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feat（添加ffmpeg库）

This commit is contained in:
“Diviner66”， 2024-11-05 21:58:53 +08:00
parent 646637e209
commit 0a203af2ff
233 changed files with 61246 additions and 127 deletions
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267
HX_CameraLoopPlay/CameraLoopPlay.ui
View File

@ -203,10 +203,13 @@ QPushButton:hover{
<number>0</number>
</property>
<item>
<layout class="QHBoxLayout" name="horizontalLayout" stretch="0,0,9">
<layout class="QHBoxLayout" name="horizontalLayout" stretch="0,0,1">
<property name="spacing">
<number>0</number>
</property>
<property name="rightMargin">
<number>0</number>
</property>
<property name="bottomMargin">
<number>0</number>
</property>
@ -945,114 +948,6 @@ border:none;</string>
</item>
</layout>
</item>
<item>
<layout class="QHBoxLayout" name="horizontalLayout_7">
<property name="spacing">
<number>0</number>
</property>
<item>
<widget class="QLabel" name="label_windowsNum">
<property name="minimumSize">
<size>
<width>0</width>
<height>28</height>
</size>
</property>
<property name="styleSheet">
<string notr="true">#label_windowsNum{
color:white;
border-image: url(:/CameraLoopPlay/Resource/image/windowNum.png);
}</string>
</property>
<property name="text">
<string>画面窗口数</string>
</property>
<property name="alignment">
<set>Qt::AlignCenter</set>
</property>
</widget>
</item>
<item>
<widget class="QComboBox" name="comboBox_windowNumber">
<property name="minimumSize">
<size>
<width>0</width>
<height>28</height>
</size>
</property>
<property name="styleSheet">
<string notr="true">QComboBox {
border: 1px solid #007BFF; /* 边框颜色为蓝色 */
padding: 5px;
color:white;
background-color: rgba(30, 31, 54, 255);
}
QComboBox::drop-down {
subcontrol-origin: padding;
subcontrol-position: top right;
width: 20px;
border-left: 1px solid #007BFF; /* 下拉按钮的左边框 */
background-color: rgba(27, 48, 107, 255); /* 下拉按钮的背景颜色为蓝色 */
}
QComboBox::down-arrow {
image: url(:/Resource/image/combox_open.png); /* 替换下拉箭头图片 */
width: 10px;
height: 10px;
}
QComboBox QAbstractItemView {
border: 1px solid #007BFF; /* 下拉列表边框颜色为蓝色 */
selection-background-color: #007BFF; /* 选中项的背景颜色为蓝色 */
selection-color: white; /* 选中项的文本颜色为白色 */
color:white;
background-color: rgba(30, 31, 54, 255);
}
QComboBox:disabled {
background-color: #E0E0E0; /* 禁用时的背景颜色 */
color: #A0A0A0; /* 禁用时的文字颜色 */
}
</string>
</property>
<item>
<property name="text">
<string>1</string>
</property>
</item>
<item>
<property name="text">
<string>4</string>
</property>
</item>
<item>
<property name="text">
<string>9</string>
</property>
</item>
<item>
<property name="text">
<string>16</string>
</property>
</item>
<item>
<property name="text">
<string>20</string>
</property>
</item>
<item>
<property name="text">
<string>36</string>
</property>
</item>
</widget>
</item>
</layout>
</item>
<item>
<layout class="QHBoxLayout" name="horizontalLayout_8">
<item>
@ -1206,6 +1101,21 @@ color:white;
</layout>
</widget>
</item>
<item>
<widget class="QWidget" name="widget" native="true">
<layout class="QVBoxLayout" name="verticalLayout_5" stretch="1,0">
<property name="leftMargin">
<number>0</number>
</property>
<property name="topMargin">
<number>0</number>
</property>
<property name="rightMargin">
<number>0</number>
</property>
<property name="bottomMargin">
<number>0</number>
</property>
<item>
<widget class="QWidget" name="widget_right" native="true">
<property name="styleSheet">
@ -1239,6 +1149,145 @@ color:white;
</layout>
</widget>
</item>
<item>
<widget class="QWidget" name="widget_2" native="true">
<layout class="QHBoxLayout" name="horizontalLayout_21">
<item>
<spacer name="horizontalSpacer_9">
<property name="orientation">
<enum>Qt::Horizontal</enum>
</property>
<property name="sizeHint" stdset="0">
<size>
<width>40</width>
<height>20</height>
</size>
</property>
</spacer>
</item>
<item>
<widget class="QPushButton" name="pushButton_2">
<property name="text">
<string>PushButton</string>
</property>
</widget>
</item>
<item>
<widget class="QPushButton" name="pushButton">
<property name="text">
<string>PushButton</string>
</property>
</widget>
</item>
<item>
<widget class="QPushButton" name="pushButton_3">
<property name="text">
<string>PushButton</string>
</property>
</widget>
</item>
<item>
<widget class="QComboBox" name="comboBox_windowNumber">
<property name="minimumSize">
<size>
<width>0</width>
<height>28</height>
</size>
</property>
<property name="styleSheet">
<string notr="true">QComboBox {
border: 1px solid #007BFF; /* 边框颜色为蓝色 */
padding: 5px;
color:white;
background-color: rgba(30, 31, 54, 255);
}
QComboBox::drop-down {
subcontrol-origin: padding;
subcontrol-position: top right;
width: 20px;
border-left: 1px solid #007BFF; /* 下拉按钮的左边框 */
background-color: rgba(27, 48, 107, 255); /* 下拉按钮的背景颜色为蓝色 */
}
QComboBox::down-arrow {
image: url(:/Resource/image/combox_open.png); /* 替换下拉箭头图片 */
width: 10px;
height: 10px;
}
QComboBox QAbstractItemView {
border: 1px solid #007BFF; /* 下拉列表边框颜色为蓝色 */
selection-background-color: #007BFF; /* 选中项的背景颜色为蓝色 */
selection-color: white; /* 选中项的文本颜色为白色 */
color:white;
background-color: rgba(30, 31, 54, 255);
}
QComboBox:disabled {
background-color: #E0E0E0; /* 禁用时的背景颜色 */
color: #A0A0A0; /* 禁用时的文字颜色 */
}
</string>
</property>
<item>
<property name="text">
<string>1</string>
</property>
</item>
<item>
<property name="text">
<string>4</string>
</property>
</item>
<item>
<property name="text">
<string>9</string>
</property>
</item>
<item>
<property name="text">
<string>16</string>
</property>
</item>
<item>
<property name="text">
<string>20</string>
</property>
</item>
<item>
<property name="text">
<string>36</string>
</property>
</item>
</widget>
</item>
<item>
<widget class="QComboBox" name="comboBox"/>
</item>
<item>
<widget class="QPushButton" name="pushButton_4">
<property name="text">
<string>PushButton</string>
</property>
</widget>
</item>
<item>
<widget class="QPushButton" name="pushButton_5">
<property name="text">
<string>PushButton</string>
</property>
</widget>
</item>
</layout>
</widget>
</item>
</layout>
</widget>
</item>
</layout>
</item>
</layout>

9
HX_CameraLoopPlay/HX_CameraLoopPlay.vcxproj
View File

@ -65,12 +65,12 @@
</PropertyGroup>
<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
<ClCompile>
<AdditionalIncludeDirectories>..\external\CH-HCNetSDK\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
<AdditionalIncludeDirectories>..\external\CH-HCNetSDK\include;.\ffmpeg\ffmpeg4\include;$(QTDIR)\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
<Optimization>Disabled</Optimization>
</ClCompile>
<Link>
<AdditionalLibraryDirectories>..\external\CH-HCNetSDK\lib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
<AdditionalDependencies>HCNetSDK.lib;HCCore.lib;PlayCtrl.lib;GdiPlus.lib;%(AdditionalDependencies)</AdditionalDependencies>
<AdditionalLibraryDirectories>..\external\CH-HCNetSDK\lib;.\ffmpeg\ffmpeg4\libwin64;$(QTDIR)\lib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
<AdditionalDependencies>Qt5Core.lib;Qt5Gui.lib;Qt5Widgets.lib;HCNetSDK.lib;HCCore.lib;PlayCtrl.lib;GdiPlus.lib;avcodec.lib;avdevice.lib;avfilter.lib;avformat.lib;avutil.lib;postproc.lib;swresample.lib;swscale.lib;%(AdditionalDependencies)</AdditionalDependencies>
</Link>
</ItemDefinitionGroup>
<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)' == 'Debug|x64'" Label="Configuration">
@ -104,6 +104,7 @@
<ItemGroup>
<ClCompile Include="component\videowindowscomponent.cpp" />
<ClCompile Include="ControlptzWidget.cpp" />
<ClCompile Include="ffmpeg\ffmpeg.cpp" />
<ClCompile Include="SingleCameraWidget.cpp" />
<QtRcc Include="CameraLoopPlay.qrc" />
<QtUic Include="CameraLoopPlay.ui" />
@ -119,6 +120,8 @@
</ItemGroup>
<ItemGroup>
<ClInclude Include="cameradeviceinfo.h" />
<QtMoc Include="ffmpeg\ffmpeg.h" />
<ClInclude Include="ffmpeg\ffmpeginclude.h" />
<ClInclude Include="model\CameraDeviceInfo.h" />
<QtMoc Include="component\videowindowscomponent.h" />
<QtMoc Include="ControlptzWidget.h" />

15
HX_CameraLoopPlay/HX_CameraLoopPlay.vcxproj.filters
View File

@ -27,6 +27,12 @@
<Filter Include="Source Files\component">
<UniqueIdentifier>{36367f84-7f0a-45d9-8b96-53eaa0db232d}</UniqueIdentifier>
</Filter>
<Filter Include="Source Files\ffmpeg">
<UniqueIdentifier>{494fd474-b2b7-4836-addd-c1ab32bc677d}</UniqueIdentifier>
</Filter>
<Filter Include="Header Files\ffmpeg">
<UniqueIdentifier>{159a4a57-a400-4f5e-9da4-5395d3a54d37}</UniqueIdentifier>
</Filter>
</ItemGroup>
<ItemGroup>
<QtRcc Include="CameraLoopPlay.qrc">
@ -58,6 +64,9 @@
<ClCompile Include="component\videowindowscomponent.cpp">
<Filter>Source Files\component</Filter>
</ClCompile>
<ClCompile Include="ffmpeg\ffmpeg.cpp">
<Filter>Source Files\ffmpeg</Filter>
</ClCompile>
</ItemGroup>
<ItemGroup>
<QtMoc Include="CameraThread.h">
@ -72,6 +81,9 @@
<QtMoc Include="component\videowindowscomponent.h">
<Filter>Header Files\component</Filter>
</QtMoc>
<QtMoc Include="ffmpeg\ffmpeg.h">
<Filter>Header Files\ffmpeg</Filter>
</QtMoc>
</ItemGroup>
<ItemGroup>
<ClInclude Include="cameradeviceinfo.h">
@ -80,6 +92,9 @@
<ClInclude Include="model\CameraDeviceInfo.h">
<Filter>Header Files</Filter>
</ClInclude>
<ClInclude Include="ffmpeg\ffmpeginclude.h">
<Filter>Header Files\ffmpeg</Filter>
</ClInclude>
</ItemGroup>
<ItemGroup>
<QtUic Include="SingleCameraWidget.ui">

474
HX_CameraLoopPlay/ffmpeg/ffmpeg.cpp Normal file
View File

@ -0,0 +1,474 @@
#include "ffmpeg.h"
FFmpegThread::FFmpegThread(QObject *parent) : QThread(parent) {
setObjectName("FFmpegThread");
stopped = false;
isPlay = false;
frameFinish = false;
videoWidth = 0;
videoHeight = 0;
videoStreamIndex = -1;
audioStreamIndex = -1;
url = "rtsp://192.168.111.11:8554/1";
buffer = NULL;
avPacket = NULL;
yuvFrame = NULL;
rgbFrame = NULL;
formatCtx = NULL;
videoCodecCtx = NULL;
audioCodecCtx = NULL;
swsContext = NULL;
options = NULL;
videoCodec = NULL;
audioCodec = NULL;
//初始化注册,一个软件中只注册一次即可
FFmpegThread::initlib();
}
//一个软件中只需要初始化一次就行
void FFmpegThread::initlib() {
static QMutex mutex;
QMutexLocker locker(&mutex);
static bool isInit = false;
if (!isInit) {
//注册库中所有可用的文件格式和解码器
//av_register_all();
//注册所有设备,主要用于本地摄像机播放支持
#ifdef ffmpegdevice
avdevice_register_all();
#endif
//初始化网络流格式,使用网络流时必须先执行
avformat_network_init();
isInit = true;
qDebug() << TIMEMS << "init ffmpeg lib ok"
<< " version:" << FFMPEG_VERSION;
#if 0
//输出所有支持的解码器名称
QStringList listCodeName;
AVCodec *code = av_codec_next(NULL);
while (code != NULL) {
listCodeName << code->name;
code = code->next;
}
qDebug() << TIMEMS << listCodeName;
#endif
}
}
bool FFmpegThread::init() {
//在打开码流前指定各种参数比如:探测时间/超时时间/最大延时等
//设置缓存大小,1080p可将值调大
av_dict_set(&options, "buffer_size", "8192000", 0);
//以tcp方式打开,如果以udp方式打开将tcp替换为udp
av_dict_set(&options, "rtsp_transport", "tcp", 0);
//设置超时断开连接时间,单位微秒,3000000表示3秒
av_dict_set(&options, "stimeout", "3000000", 0);
//设置最大时延,单位微秒,1000000表示1秒
av_dict_set(&options, "max_delay", "1000000", 0);
//自动开启线程数
av_dict_set(&options, "threads", "auto", 0);
//打开视频流
formatCtx = avformat_alloc_context();
int result =
avformat_open_input(&formatCtx, url.toStdString().data(), NULL, &options);
if (result < 0) {
qDebug() << TIMEMS << "open input error" << url;
return false;
}
//释放设置参数
if (options != NULL) {
av_dict_free(&options);
}
//获取流信息
result = avformat_find_stream_info(formatCtx, NULL);
if (result < 0) {
qDebug() << TIMEMS << "find stream info error";
return false;
}
//----------视频流部分开始,打个标记方便折叠代码----------
if (1) {
videoStreamIndex = av_find_best_stream(formatCtx, AVMEDIA_TYPE_VIDEO, -1,
-1, &videoCodec, 0);
if (videoStreamIndex < 0) {
qDebug() << TIMEMS << "find video stream index error";
return false;
}
// 获取视频流
AVStream* videoStream = formatCtx->streams[videoStreamIndex];
// 获取视频流的编解码器参数
AVCodecParameters* codecPar = videoStream->codecpar; // 获取编解码器参数
// 查找解码器
AVCodec* videoCodec = avcodec_find_decoder(codecPar->codec_id); // 根据 codec_id 查找解码器
if (videoCodec == NULL) {
qDebug() << TIMEMS << "video decoder not found";
return false;
}
// 创建解码器上下文
videoCodecCtx = avcodec_alloc_context3(videoCodec);
if (!videoCodecCtx) {
qDebug() << TIMEMS << "Could not allocate codec context";
return false;
}
// 将编解码器参数拷贝到解码器上下文
if (avcodec_parameters_to_context(videoCodecCtx, codecPar) < 0) {
qDebug() << TIMEMS << "Failed to copy codec parameters to codec context";
return false;
}
// 打开解码器
if (avcodec_open2(videoCodecCtx, videoCodec, nullptr) < 0) {
qDebug() << TIMEMS << "Failed to open codec";
return false;
}
//设置加速解码
videoCodecCtx->lowres = videoCodec->max_lowres;
videoCodecCtx->flags2 |= AV_CODEC_FLAG2_FAST;
//打开视频解码器
result = avcodec_open2(videoCodecCtx, videoCodec, NULL);
if (result < 0) {
qDebug() << TIMEMS << "open video codec error";
return false;
}
//获取分辨率大小
videoWidth = videoCodecCtx->width;
videoHeight = videoCodecCtx->height;
//如果没有获取到宽高则返回
if (videoWidth == 0 || videoHeight == 0) {
qDebug() << TIMEMS << "find width height error";
return false;
}
QString videoInfo = QString("视频流信息 -> 索引: %1 解码: %2 格式: %3 "
"时长: %4 秒 分辨率: %5*%6")
.arg(videoStreamIndex)
.arg(videoCodec->name)
.arg(formatCtx->iformat->name)
.arg((formatCtx->duration) / 1000000)
.arg(videoWidth)
.arg(videoHeight);
qDebug() << TIMEMS << videoInfo;
}
//----------视频流部分开始----------
//----------音频流部分开始,打个标记方便折叠代码----------
//----------音频流部分开始,打个标记方便折叠代码----------
if (1) {
// 循环查找音频流索引
audioStreamIndex = -1;
for (uint i = 0; i < formatCtx->nb_streams; i++) {
if (formatCtx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
audioStreamIndex = i;
break;
}
}
// 有些没有音频流,所以这里不用返回
if (audioStreamIndex == -1) {
qDebug() << TIMEMS << "find audio stream index error";
}
else {
// 获取音频流
AVStream* audioStream = formatCtx->streams[audioStreamIndex];
// 获取音频流的编解码器参数
AVCodecParameters* audioCodecPar = audioStream->codecpar;
// 查找解码器
audioCodec = avcodec_find_decoder(audioCodecPar->codec_id);
if (audioCodec == NULL) {
qDebug() << TIMEMS << "audio codec not found";
return false;
}
// 创建解码器上下文
audioCodecCtx = avcodec_alloc_context3(audioCodec);
if (!audioCodecCtx) {
qDebug() << TIMEMS << "Could not allocate audio codec context";
return false;
}
// 将编解码器参数拷贝到解码器上下文
if (avcodec_parameters_to_context(audioCodecCtx, audioCodecPar) < 0) {
qDebug() << TIMEMS << "Failed to copy audio codec parameters to codec context";
return false;
}
// 打开音频解码器
int result = avcodec_open2(audioCodecCtx, audioCodec, NULL);
if (result < 0) {
qDebug() << TIMEMS << "open audio codec error";
return false;
}
// 输出音频流信息
QString audioInfo = QString("音频流信息 -> 索引: %1 解码: %2 比特率: "
"%3 声道数: %4 采样: %5")
.arg(audioStreamIndex)
.arg(audioCodec->name)
.arg(formatCtx->bit_rate)
.arg(audioCodecCtx->channels)
.arg(audioCodecCtx->sample_rate);
qDebug() << TIMEMS << audioInfo;
}
}
//----------音频流部分结束----------
//预分配好内存
avPacket = av_packet_alloc();
yuvFrame = av_frame_alloc();
rgbFrame = av_frame_alloc();
int byte = av_image_get_buffer_size(AV_PIX_FMT_RGB32, videoWidth, videoHeight,1);
buffer = (uint8_t *)av_malloc(byte * sizeof(uint8_t));
//定义像素格式
AVPixelFormat srcFormat = AV_PIX_FMT_YUV420P;
AVPixelFormat dstFormat = AV_PIX_FMT_RGB32;
//通过解码器获取解码格式
srcFormat = videoCodecCtx->pix_fmt;
//默认最快速度的解码采用的SWS_FAST_BILINEAR参数,可能会丢失部分图片数据,可以自行更改成其他参数
int flags = SWS_FAST_BILINEAR;
//开辟缓存存储一帧数据
//以下两种方法都可以,avpicture_fill已经逐渐被废弃
// avpicture_fill((AVPicture *)rgbFrame, buffer, dstFormat, videoWidth,
// videoHeight);
av_image_fill_arrays(rgbFrame->data, rgbFrame->linesize, buffer, dstFormat,
videoWidth, videoHeight, 1);
//图像转换
swsContext = sws_getContext(videoWidth, videoHeight, srcFormat, videoWidth,
videoHeight, dstFormat, flags, NULL, NULL, NULL);
//输出视频信息
// av_dump_format(formatCtx, 0, url.toStdString().data(), 0);
// qDebug() << TIMEMS << "init ffmpeg finsh";
return true;
}
void FFmpegThread::run() {
qint64 startTime = av_gettime();
while (!stopped) {
//根据标志位执行初始化操作
if (isPlay) {
this->init();
isPlay = false;
continue;
}
frameFinish = av_read_frame(formatCtx, avPacket);
if (frameFinish >= 0) {
//下面演示倍速播放
if (0) {
double speed = 2.0;
avPacket->pts = avPacket->pts / speed;
avPacket->dts = avPacket->dts / speed;
}
//判断当前包是视频还是音频
int index = avPacket->stream_index;
if (index == videoStreamIndex) {
//解码视频流 avcodec_decode_video2 方法已被废弃
#if 0
avcodec_decode_video2(videoCodecCtx, yuvFrame, &frameFinish, avPacket);
#else
frameFinish = avcodec_send_packet(videoCodecCtx, avPacket);
if (frameFinish < 0) {
continue;
}
frameFinish = avcodec_receive_frame(videoCodecCtx, yuvFrame);
if (frameFinish < 0) {
continue;
}
#endif
if (frameFinish >= 0) {
//将数据转成一张图片
sws_scale(swsContext, (const uint8_t *const *)yuvFrame->data,
yuvFrame->linesize, 0, videoHeight, rgbFrame->data,
rgbFrame->linesize);
//以下两种方法都可以
// QImage image(rgbFrame->data[0], videoWidth, videoHeight,
// QImage::Format_RGB32);
QImage image((uchar *)buffer, videoWidth, videoHeight,
QImage::Format_RGB32);
if (!image.isNull()) {
emit receiveImage(image);
}
usleep(1);
}
#if 1
//延时(不然文件会立即全部播放完)
AVRational timeBase = {1, AV_TIME_BASE};
int64_t ptsTime = av_rescale_q(
avPacket->dts, formatCtx->streams[videoStreamIndex]->time_base,
timeBase);
int64_t nowTime = av_gettime() - startTime;
if (ptsTime > nowTime) {
av_usleep(ptsTime - nowTime);
}
#endif
} else if (index == audioStreamIndex) {
//解码音频流,自行处理
}
}
av_packet_unref(avPacket);
av_freep(avPacket);
usleep(1);
}
//线程结束后释放资源
free();
stopped = false;
isPlay = false;
qDebug() << TIMEMS << "stop ffmpeg thread";
}
void FFmpegThread::setUrl(const QString &url) { this->url = url; }
void FFmpegThread::free() {
if (swsContext != NULL) {
sws_freeContext(swsContext);
swsContext = NULL;
}
if (avPacket != NULL) {
av_packet_unref(avPacket);
avPacket = NULL;
}
if (yuvFrame != NULL) {
av_frame_free(&yuvFrame);
yuvFrame = NULL;
}
if (rgbFrame != NULL) {
av_frame_free(&rgbFrame);
rgbFrame = NULL;
}
if (videoCodecCtx != NULL) {
avcodec_close(videoCodecCtx);
videoCodecCtx = NULL;
}
if (audioCodecCtx != NULL) {
avcodec_close(audioCodecCtx);
audioCodecCtx = NULL;
}
if (formatCtx != NULL) {
avformat_close_input(&formatCtx);
formatCtx = NULL;
}
av_dict_free(&options);
// qDebug() << TIMEMS << "close ffmpeg ok";
}
void FFmpegThread::play() {
//通过标志位让线程执行初始化
isPlay = true;
}
void FFmpegThread::pause() {}
void FFmpegThread::next() {}
void FFmpegThread::stop() {
//通过标志位让线程停止
stopped = true;
}
//实时视频显示窗体类
FFmpegWidget::FFmpegWidget(QWidget *parent) : QWidget(parent) {
thread = new FFmpegThread(this);
connect(thread, SIGNAL(receiveImage(QImage)), this,
SLOT(updateImage(QImage)));
image = QImage();
}
FFmpegWidget::~FFmpegWidget() { close(); }
void FFmpegWidget::paintEvent(QPaintEvent *) {
if (image.isNull()) {
return;
}
// qDebug() << TIMEMS << "paintEvent" << objectName();
QPainter painter(this);
#if 0
//image = image.scaled(this->size(), Qt::KeepAspectRatio);
//按照比例自动居中绘制
int pixX = rect().center().x() - image.width() / 2;
int pixY = rect().center().y() - image.height() / 2;
QPoint point(pixX, pixY);
painter.drawImage(point, image);
#else
painter.drawImage(this->rect(), image);
#endif
}
void FFmpegWidget::updateImage(const QImage &image) {
// this->image = image.copy();
this->image = image;
this->update();
}
void FFmpegWidget::setUrl(const QString &url) { thread->setUrl(url); }
void FFmpegWidget::open() {
// qDebug() << TIMEMS << "open video" << objectName();
clear();
thread->play();
thread->start();
}
void FFmpegWidget::pause() { thread->pause(); }
void FFmpegWidget::next() { thread->next(); }
void FFmpegWidget::close() {
// qDebug() << TIMEMS << "close video" << objectName();
if (thread->isRunning()) {
thread->stop();
thread->quit();
thread->wait(500);
}
QTimer::singleShot(1, this, SLOT(clear()));
}
void FFmpegWidget::clear() {
image = QImage();
update();
}

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#ifndef FFMPEG_H
#define FFMPEG_H
#include <QtGui>
#if (QT_VERSION >= QT_VERSION_CHECK(5,0,0))
#include <QtWidgets>
#endif
#include "ffmpeginclude.h"
class FFmpegThread : public QThread
{
Q_OBJECT
public:
explicit FFmpegThread(QObject *parent = 0);
static void initlib();
protected:
void run();
private:
volatile bool stopped; //线程停止标志位
volatile bool isPlay; //播放视频标志位
int frameFinish; //一帧完成
int videoWidth; //视频宽度
int videoHeight; //视频高度
int videoStreamIndex; //视频流索引
int audioStreamIndex; //音频流索引
QString url; //视频流地址
uint8_t *buffer; //存储解码后图片buffer
AVPacket *avPacket; //包对象
AVFrame *yuvFrame; //原始视频帧
AVFrame *rgbFrame; //转图片视频帧
AVFormatContext *formatCtx; //格式上下文
AVCodecContext *videoCodecCtx; //视频解码器上下文
AVCodecContext *audioCodecCtx; //音频解码器上下文
SwsContext *swsContext; //处理图片数据对象
AVDictionary *options; //参数对象
AVCodec *videoCodec; //视频解码器
AVCodec *audioCodec; //音频解码器
signals:
//收到图片信号
void receiveImage(const QImage &image);
public slots:
//设置视频流地址
void setUrl(const QString &url);
//初始化视频对象
bool init();
//释放对象
void free();
//播放视频对象
void play();
//暂停播放
void pause();
//继续播放
void next();
//停止采集线程
void stop();
};
//实时视频显示窗体类
class FFmpegWidget : public QWidget
{
Q_OBJECT
public:
explicit FFmpegWidget(QWidget *parent = 0);
~FFmpegWidget();
protected:
void paintEvent(QPaintEvent *);
private:
FFmpegThread *thread;
QImage image;
private slots:
//接收图像并绘制
void updateImage(const QImage &image);
public slots:
//设置视频流地址
void setUrl(const QString &url);
//打开设备
void open();
//暂停
void pause();
//继续
void next();
//关闭设备
void close();
//清空
void clear();
};
#endif // FFMPEG_H

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#如果用的是ffmpeg4内核请将ffmpeg3改成ffmpeg4
DEFINES += ffmpeg4
contains(DEFINES, ffmpeg4) {
path_main = ffmpeg4
} else {
path_main = ffmpeg3
}
contains(QT_ARCH, x86_64) {
path_lib = libwin64
} else {
path_lib = libwin32
}
#包含头文件
INCLUDEPATH += $$PWD/$$path_main/include
#链接库文件
LIBS += -L$$PWD/$$path_main/$$path_lib/ -lavformat -lavfilter -lavcodec -lswresample -lswscale -lavutil
HEADERS += $$PWD/ffmpeginclude.h
HEADERS += $$PWD/ffmpeg.h
SOURCES += $$PWD/ffmpeg.cpp

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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_AVDCT_H
#define AVCODEC_AVDCT_H
#include "libavutil/opt.h"
/**
* AVDCT context.
* @note function pointers can be NULL if the specific features have been
* disabled at build time.
*/
typedef struct AVDCT {
const AVClass *av_class;
void (*idct)(int16_t *block /* align 16 */);
/**
* IDCT input permutation.
* Several optimized IDCTs need a permutated input (relative to the
* normal order of the reference IDCT).
* This permutation must be performed before the idct_put/add.
* Note, normally this can be merged with the zigzag/alternate scan<br>
* An example to avoid confusion:
* - (->decode coeffs -> zigzag reorder -> dequant -> reference IDCT -> ...)
* - (x -> reference DCT -> reference IDCT -> x)
* - (x -> reference DCT -> simple_mmx_perm = idct_permutation
* -> simple_idct_mmx -> x)
* - (-> decode coeffs -> zigzag reorder -> simple_mmx_perm -> dequant
* -> simple_idct_mmx -> ...)
*/
uint8_t idct_permutation[64];
void (*fdct)(int16_t *block /* align 16 */);
/**
* DCT algorithm.
* must use AVOptions to set this field.
*/
int dct_algo;
/**
* IDCT algorithm.
* must use AVOptions to set this field.
*/
int idct_algo;
void (*get_pixels)(int16_t *block /* align 16 */,
const uint8_t *pixels /* align 8 */,
ptrdiff_t line_size);
int bits_per_sample;
} AVDCT;
/**
* Allocates a AVDCT context.
* This needs to be initialized with avcodec_dct_init() after optionally
* configuring it with AVOptions.
*
* To free it use av_free()
*/
AVDCT *avcodec_dct_alloc(void);
int avcodec_dct_init(AVDCT *);
const AVClass *avcodec_dct_get_class(void);
#endif /* AVCODEC_AVDCT_H */

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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_AVFFT_H
#define AVCODEC_AVFFT_H
/**
* @file
* @ingroup lavc_fft
* FFT functions
*/
/**
* @defgroup lavc_fft FFT functions
* @ingroup lavc_misc
*
* @{
*/
typedef float FFTSample;
typedef struct FFTComplex {
FFTSample re, im;
} FFTComplex;
typedef struct FFTContext FFTContext;
/**
* Set up a complex FFT.
* @param nbits log2 of the length of the input array
* @param inverse if 0 perform the forward transform, if 1 perform the inverse
*/
FFTContext *av_fft_init(int nbits, int inverse);
/**
* Do the permutation needed BEFORE calling ff_fft_calc().
*/
void av_fft_permute(FFTContext *s, FFTComplex *z);
/**
* Do a complex FFT with the parameters defined in av_fft_init(). The
* input data must be permuted before. No 1.0/sqrt(n) normalization is done.
*/
void av_fft_calc(FFTContext *s, FFTComplex *z);
void av_fft_end(FFTContext *s);
FFTContext *av_mdct_init(int nbits, int inverse, double scale);
void av_imdct_calc(FFTContext *s, FFTSample *output, const FFTSample *input);
void av_imdct_half(FFTContext *s, FFTSample *output, const FFTSample *input);
void av_mdct_calc(FFTContext *s, FFTSample *output, const FFTSample *input);
void av_mdct_end(FFTContext *s);
/* Real Discrete Fourier Transform */
enum RDFTransformType {
DFT_R2C,
IDFT_C2R,
IDFT_R2C,
DFT_C2R,
};
typedef struct RDFTContext RDFTContext;
/**
* Set up a real FFT.
* @param nbits log2 of the length of the input array
* @param trans the type of transform
*/
RDFTContext *av_rdft_init(int nbits, enum RDFTransformType trans);
void av_rdft_calc(RDFTContext *s, FFTSample *data);
void av_rdft_end(RDFTContext *s);
/* Discrete Cosine Transform */
typedef struct DCTContext DCTContext;
enum DCTTransformType {
DCT_II = 0,
DCT_III,
DCT_I,
DST_I,
};
/**
* Set up DCT.
*
* @param nbits size of the input array:
* (1 << nbits) for DCT-II, DCT-III and DST-I
* (1 << nbits) + 1 for DCT-I
* @param type the type of transform
*
* @note the first element of the input of DST-I is ignored
*/
DCTContext *av_dct_init(int nbits, enum DCTTransformType type);
void av_dct_calc(DCTContext *s, FFTSample *data);
void av_dct_end (DCTContext *s);
/**
* @}
*/
#endif /* AVCODEC_AVFFT_H */

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/*
* Direct3D11 HW acceleration
*
* copyright (c) 2009 Laurent Aimar
* copyright (c) 2015 Steve Lhomme
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_D3D11VA_H
#define AVCODEC_D3D11VA_H
/**
* @file
* @ingroup lavc_codec_hwaccel_d3d11va
* Public libavcodec D3D11VA header.
*/
#if !defined(_WIN32_WINNT) || _WIN32_WINNT < 0x0602
#undef _WIN32_WINNT
#define _WIN32_WINNT 0x0602
#endif
#include <stdint.h>
#include <d3d11.h>
/**
* @defgroup lavc_codec_hwaccel_d3d11va Direct3D11
* @ingroup lavc_codec_hwaccel
*
* @{
*/
#define FF_DXVA2_WORKAROUND_SCALING_LIST_ZIGZAG 1 ///< Work around for Direct3D11 and old UVD/UVD+ ATI video cards
#define FF_DXVA2_WORKAROUND_INTEL_CLEARVIDEO 2 ///< Work around for Direct3D11 and old Intel GPUs with ClearVideo interface
/**
* This structure is used to provides the necessary configurations and data
* to the Direct3D11 FFmpeg HWAccel implementation.
*
* The application must make it available as AVCodecContext.hwaccel_context.
*
* Use av_d3d11va_alloc_context() exclusively to allocate an AVD3D11VAContext.
*/
typedef struct AVD3D11VAContext {
/**
* D3D11 decoder object
*/
ID3D11VideoDecoder *decoder;
/**
* D3D11 VideoContext
*/
ID3D11VideoContext *video_context;
/**
* D3D11 configuration used to create the decoder
*/
D3D11_VIDEO_DECODER_CONFIG *cfg;
/**
* The number of surface in the surface array
*/
unsigned surface_count;
/**
* The array of Direct3D surfaces used to create the decoder
*/
ID3D11VideoDecoderOutputView **surface;
/**
* A bit field configuring the workarounds needed for using the decoder
*/
uint64_t workaround;
/**
* Private to the FFmpeg AVHWAccel implementation
*/
unsigned report_id;
/**
* Mutex to access video_context
*/
HANDLE context_mutex;
} AVD3D11VAContext;
/**
* Allocate an AVD3D11VAContext.
*
* @return Newly-allocated AVD3D11VAContext or NULL on failure.
*/
AVD3D11VAContext *av_d3d11va_alloc_context(void);
/**
* @}
*/
#endif /* AVCODEC_D3D11VA_H */

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/*
* Copyright (C) 2007 Marco Gerards <marco@gnu.org>
* Copyright (C) 2009 David Conrad
* Copyright (C) 2011 Jordi Ortiz
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_DIRAC_H
#define AVCODEC_DIRAC_H
/**
* @file
* Interface to Dirac Decoder/Encoder
* @author Marco Gerards <marco@gnu.org>
* @author David Conrad
* @author Jordi Ortiz
*/
#include "avcodec.h"
/**
* The spec limits the number of wavelet decompositions to 4 for both
* level 1 (VC-2) and 128 (long-gop default).
* 5 decompositions is the maximum before >16-bit buffers are needed.
* Schroedinger allows this for DD 9,7 and 13,7 wavelets only, limiting
* the others to 4 decompositions (or 3 for the fidelity filter).
*
* We use this instead of MAX_DECOMPOSITIONS to save some memory.
*/
#define MAX_DWT_LEVELS 5
/**
* Parse code values:
*
* Dirac Specification ->
* 9.6.1 Table 9.1
*
* VC-2 Specification ->
* 10.4.1 Table 10.1
*/
enum DiracParseCodes {
DIRAC_PCODE_SEQ_HEADER = 0x00,
DIRAC_PCODE_END_SEQ = 0x10,
DIRAC_PCODE_AUX = 0x20,
DIRAC_PCODE_PAD = 0x30,
DIRAC_PCODE_PICTURE_CODED = 0x08,
DIRAC_PCODE_PICTURE_RAW = 0x48,
DIRAC_PCODE_PICTURE_LOW_DEL = 0xC8,
DIRAC_PCODE_PICTURE_HQ = 0xE8,
DIRAC_PCODE_INTER_NOREF_CO1 = 0x0A,
DIRAC_PCODE_INTER_NOREF_CO2 = 0x09,
DIRAC_PCODE_INTER_REF_CO1 = 0x0D,
DIRAC_PCODE_INTER_REF_CO2 = 0x0E,
DIRAC_PCODE_INTRA_REF_CO = 0x0C,
DIRAC_PCODE_INTRA_REF_RAW = 0x4C,
DIRAC_PCODE_INTRA_REF_PICT = 0xCC,
DIRAC_PCODE_MAGIC = 0x42424344,
};
typedef struct DiracVersionInfo {
int major;
int minor;
} DiracVersionInfo;
typedef struct AVDiracSeqHeader {
unsigned width;
unsigned height;
uint8_t chroma_format; ///< 0: 444 1: 422 2: 420
uint8_t interlaced;
uint8_t top_field_first;
uint8_t frame_rate_index; ///< index into dirac_frame_rate[]
uint8_t aspect_ratio_index; ///< index into dirac_aspect_ratio[]
uint16_t clean_width;
uint16_t clean_height;
uint16_t clean_left_offset;
uint16_t clean_right_offset;
uint8_t pixel_range_index; ///< index into dirac_pixel_range_presets[]
uint8_t color_spec_index; ///< index into dirac_color_spec_presets[]
int profile;
int level;
AVRational framerate;
AVRational sample_aspect_ratio;
enum AVPixelFormat pix_fmt;
enum AVColorRange color_range;
enum AVColorPrimaries color_primaries;
enum AVColorTransferCharacteristic color_trc;
enum AVColorSpace colorspace;
DiracVersionInfo version;
int bit_depth;
} AVDiracSeqHeader;
/**
* Parse a Dirac sequence header.
*
* @param dsh this function will allocate and fill an AVDiracSeqHeader struct
* and write it into this pointer. The caller must free it with
* av_free().
* @param buf the data buffer
* @param buf_size the size of the data buffer in bytes
* @param log_ctx if non-NULL, this function will log errors here
* @return 0 on success, a negative AVERROR code on failure
*/
int av_dirac_parse_sequence_header(AVDiracSeqHeader **dsh,
const uint8_t *buf, size_t buf_size,
void *log_ctx);
#endif /* AVCODEC_DIRAC_H */

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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_DV_PROFILE_H
#define AVCODEC_DV_PROFILE_H
#include <stdint.h>
#include "libavutil/pixfmt.h"
#include "libavutil/rational.h"
#include "avcodec.h"
/* minimum number of bytes to read from a DV stream in order to
* determine the profile */
#define DV_PROFILE_BYTES (6 * 80) /* 6 DIF blocks */
/*
* AVDVProfile is used to express the differences between various
* DV flavors. For now it's primarily used for differentiating
* 525/60 and 625/50, but the plans are to use it for various
* DV specs as well (e.g. SMPTE314M vs. IEC 61834).
*/
typedef struct AVDVProfile {
int dsf; /* value of the dsf in the DV header */
int video_stype; /* stype for VAUX source pack */
int frame_size; /* total size of one frame in bytes */
int difseg_size; /* number of DIF segments per DIF channel */
int n_difchan; /* number of DIF channels per frame */
AVRational time_base; /* 1/framerate */
int ltc_divisor; /* FPS from the LTS standpoint */
int height; /* picture height in pixels */
int width; /* picture width in pixels */
AVRational sar[2]; /* sample aspect ratios for 4:3 and 16:9 */
enum AVPixelFormat pix_fmt; /* picture pixel format */
int bpm; /* blocks per macroblock */
const uint8_t *block_sizes; /* AC block sizes, in bits */
int audio_stride; /* size of audio_shuffle table */
int audio_min_samples[3]; /* min amount of audio samples */
/* for 48kHz, 44.1kHz and 32kHz */
int audio_samples_dist[5]; /* how many samples are supposed to be */
/* in each frame in a 5 frames window */
const uint8_t (*audio_shuffle)[9]; /* PCM shuffling table */
} AVDVProfile;
/**
* Get a DV profile for the provided compressed frame.
*
* @param sys the profile used for the previous frame, may be NULL
* @param frame the compressed data buffer
* @param buf_size size of the buffer in bytes
* @return the DV profile for the supplied data or NULL on failure
*/
const AVDVProfile *av_dv_frame_profile(const AVDVProfile *sys,
const uint8_t *frame, unsigned buf_size);
/**
* Get a DV profile for the provided stream parameters.
*/
const AVDVProfile *av_dv_codec_profile(int width, int height, enum AVPixelFormat pix_fmt);
/**
* Get a DV profile for the provided stream parameters.
* The frame rate is used as a best-effort parameter.
*/
const AVDVProfile *av_dv_codec_profile2(int width, int height, enum AVPixelFormat pix_fmt, AVRational frame_rate);
#endif /* AVCODEC_DV_PROFILE_H */

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/*
* DXVA2 HW acceleration
*
* copyright (c) 2009 Laurent Aimar
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_DXVA2_H
#define AVCODEC_DXVA2_H
/**
* @file
* @ingroup lavc_codec_hwaccel_dxva2
* Public libavcodec DXVA2 header.
*/
#if !defined(_WIN32_WINNT) || _WIN32_WINNT < 0x0602
#undef _WIN32_WINNT
#define _WIN32_WINNT 0x0602
#endif
#include <stdint.h>
#include <d3d9.h>
#include <dxva2api.h>
/**
* @defgroup lavc_codec_hwaccel_dxva2 DXVA2
* @ingroup lavc_codec_hwaccel
*
* @{
*/
#define FF_DXVA2_WORKAROUND_SCALING_LIST_ZIGZAG 1 ///< Work around for DXVA2 and old UVD/UVD+ ATI video cards
#define FF_DXVA2_WORKAROUND_INTEL_CLEARVIDEO 2 ///< Work around for DXVA2 and old Intel GPUs with ClearVideo interface
/**
* This structure is used to provides the necessary configurations and data
* to the DXVA2 FFmpeg HWAccel implementation.
*
* The application must make it available as AVCodecContext.hwaccel_context.
*/
struct dxva_context {
/**
* DXVA2 decoder object
*/
IDirectXVideoDecoder *decoder;
/**
* DXVA2 configuration used to create the decoder
*/
const DXVA2_ConfigPictureDecode *cfg;
/**
* The number of surface in the surface array
*/
unsigned surface_count;
/**
* The array of Direct3D surfaces used to create the decoder
*/
LPDIRECT3DSURFACE9 *surface;
/**
* A bit field configuring the workarounds needed for using the decoder
*/
uint64_t workaround;
/**
* Private to the FFmpeg AVHWAccel implementation
*/
unsigned report_id;
};
/**
* @}
*/
#endif /* AVCODEC_DXVA2_H */

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/*
* JNI public API functions
*
* Copyright (c) 2015-2016 Matthieu Bouron <matthieu.bouron stupeflix.com>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_JNI_H
#define AVCODEC_JNI_H
/*
* Manually set a Java virtual machine which will be used to retrieve the JNI
* environment. Once a Java VM is set it cannot be changed afterwards, meaning
* you can call multiple times av_jni_set_java_vm with the same Java VM pointer
* however it will error out if you try to set a different Java VM.
*
* @param vm Java virtual machine
* @param log_ctx context used for logging, can be NULL
* @return 0 on success, < 0 otherwise
*/
int av_jni_set_java_vm(void *vm, void *log_ctx);
/*
* Get the Java virtual machine which has been set with av_jni_set_java_vm.
*
* @param vm Java virtual machine
* @return a pointer to the Java virtual machine
*/
void *av_jni_get_java_vm(void *log_ctx);
#endif /* AVCODEC_JNI_H */

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/*
* Android MediaCodec public API
*
* Copyright (c) 2016 Matthieu Bouron <matthieu.bouron stupeflix.com>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_MEDIACODEC_H
#define AVCODEC_MEDIACODEC_H
#include "libavcodec/avcodec.h"
/**
* This structure holds a reference to a android/view/Surface object that will
* be used as output by the decoder.
*
*/
typedef struct AVMediaCodecContext {
/**
* android/view/Surface object reference.
*/
void *surface;
} AVMediaCodecContext;
/**
* Allocate and initialize a MediaCodec context.
*
* When decoding with MediaCodec is finished, the caller must free the
* MediaCodec context with av_mediacodec_default_free.
*
* @return a pointer to a newly allocated AVMediaCodecContext on success, NULL otherwise
*/
AVMediaCodecContext *av_mediacodec_alloc_context(void);
/**
* Convenience function that sets up the MediaCodec context.
*
* @param avctx codec context
* @param ctx MediaCodec context to initialize
* @param surface reference to an android/view/Surface
* @return 0 on success, < 0 otherwise
*/
int av_mediacodec_default_init(AVCodecContext *avctx, AVMediaCodecContext *ctx, void *surface);
/**
* This function must be called to free the MediaCodec context initialized with
* av_mediacodec_default_init().
*
* @param avctx codec context
*/
void av_mediacodec_default_free(AVCodecContext *avctx);
/**
* Opaque structure representing a MediaCodec buffer to render.
*/
typedef struct MediaCodecBuffer AVMediaCodecBuffer;
/**
* Release a MediaCodec buffer and render it to the surface that is associated
* with the decoder. This function should only be called once on a given
* buffer, once released the underlying buffer returns to the codec, thus
* subsequent calls to this function will have no effect.
*
* @param buffer the buffer to render
* @param render 1 to release and render the buffer to the surface or 0 to
* discard the buffer
* @return 0 on success, < 0 otherwise
*/
int av_mediacodec_release_buffer(AVMediaCodecBuffer *buffer, int render);
#endif /* AVCODEC_MEDIACODEC_H */

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/*
* Intel MediaSDK QSV public API
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_QSV_H
#define AVCODEC_QSV_H
#include <mfx/mfxvideo.h>
#include "libavutil/buffer.h"
/**
* This struct is used for communicating QSV parameters between libavcodec and
* the caller. It is managed by the caller and must be assigned to
* AVCodecContext.hwaccel_context.
* - decoding: hwaccel_context must be set on return from the get_format()
* callback
* - encoding: hwaccel_context must be set before avcodec_open2()
*/
typedef struct AVQSVContext {
/**
* If non-NULL, the session to use for encoding or decoding.
* Otherwise, libavcodec will try to create an internal session.
*/
mfxSession session;
/**
* The IO pattern to use.
*/
int iopattern;
/**
* Extra buffers to pass to encoder or decoder initialization.
*/
mfxExtBuffer **ext_buffers;
int nb_ext_buffers;
/**
* Encoding only. If this field is set to non-zero by the caller, libavcodec
* will create an mfxExtOpaqueSurfaceAlloc extended buffer and pass it to
* the encoder initialization. This only makes sense if iopattern is also
* set to MFX_IOPATTERN_IN_OPAQUE_MEMORY.
*
* The number of allocated opaque surfaces will be the sum of the number
* required by the encoder and the user-provided value nb_opaque_surfaces.
* The array of the opaque surfaces will be exported to the caller through
* the opaque_surfaces field.
*/
int opaque_alloc;
/**
* Encoding only, and only if opaque_alloc is set to non-zero. Before
* calling avcodec_open2(), the caller should set this field to the number
* of extra opaque surfaces to allocate beyond what is required by the
* encoder.
*
* On return from avcodec_open2(), this field will be set by libavcodec to
* the total number of allocated opaque surfaces.
*/
int nb_opaque_surfaces;
/**
* Encoding only, and only if opaque_alloc is set to non-zero. On return
* from avcodec_open2(), this field will be used by libavcodec to export the
* array of the allocated opaque surfaces to the caller, so they can be
* passed to other parts of the pipeline.
*
* The buffer reference exported here is owned and managed by libavcodec,
* the callers should make their own reference with av_buffer_ref() and free
* it with av_buffer_unref() when it is no longer needed.
*
* The buffer data is an nb_opaque_surfaces-sized array of mfxFrameSurface1.
*/
AVBufferRef *opaque_surfaces;
/**
* Encoding only, and only if opaque_alloc is set to non-zero. On return
* from avcodec_open2(), this field will be set to the surface type used in
* the opaque allocation request.
*/
int opaque_alloc_type;
} AVQSVContext;
/**
* Allocate a new context.
*
* It must be freed by the caller with av_free().
*/
AVQSVContext *av_qsv_alloc_context(void);
#endif /* AVCODEC_QSV_H */

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/*
* Video Acceleration API (shared data between FFmpeg and the video player)
* HW decode acceleration for MPEG-2, MPEG-4, H.264 and VC-1
*
* Copyright (C) 2008-2009 Splitted-Desktop Systems
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_VAAPI_H
#define AVCODEC_VAAPI_H
/**
* @file
* @ingroup lavc_codec_hwaccel_vaapi
* Public libavcodec VA API header.
*/
#include <stdint.h>
#include "libavutil/attributes.h"
#include "version.h"
#if FF_API_STRUCT_VAAPI_CONTEXT
/**
* @defgroup lavc_codec_hwaccel_vaapi VA API Decoding
* @ingroup lavc_codec_hwaccel
* @{
*/
/**
* This structure is used to share data between the FFmpeg library and
* the client video application.
* This shall be zero-allocated and available as
* AVCodecContext.hwaccel_context. All user members can be set once
* during initialization or through each AVCodecContext.get_buffer()
* function call. In any case, they must be valid prior to calling
* decoding functions.
*
* Deprecated: use AVCodecContext.hw_frames_ctx instead.
*/
struct attribute_deprecated vaapi_context {
/**
* Window system dependent data
*
* - encoding: unused
* - decoding: Set by user
*/
void *display;
/**
* Configuration ID
*
* - encoding: unused
* - decoding: Set by user
*/
uint32_t config_id;
/**
* Context ID (video decode pipeline)
*
* - encoding: unused
* - decoding: Set by user
*/
uint32_t context_id;
#if FF_API_VAAPI_CONTEXT
/**
* VAPictureParameterBuffer ID
*
* - encoding: unused
* - decoding: Set by libavcodec
*/
attribute_deprecated
uint32_t pic_param_buf_id;
/**
* VAIQMatrixBuffer ID
*
* - encoding: unused
* - decoding: Set by libavcodec
*/
attribute_deprecated
uint32_t iq_matrix_buf_id;
/**
* VABitPlaneBuffer ID (for VC-1 decoding)
*
* - encoding: unused
* - decoding: Set by libavcodec
*/
attribute_deprecated
uint32_t bitplane_buf_id;
/**
* Slice parameter/data buffer IDs
*
* - encoding: unused
* - decoding: Set by libavcodec
*/
attribute_deprecated
uint32_t *slice_buf_ids;
/**
* Number of effective slice buffer IDs to send to the HW
*
* - encoding: unused
* - decoding: Set by libavcodec
*/
attribute_deprecated
unsigned int n_slice_buf_ids;
/**
* Size of pre-allocated slice_buf_ids
*
* - encoding: unused
* - decoding: Set by libavcodec
*/
attribute_deprecated
unsigned int slice_buf_ids_alloc;
/**
* Pointer to VASliceParameterBuffers
*
* - encoding: unused
* - decoding: Set by libavcodec
*/
attribute_deprecated
void *slice_params;
/**
* Size of a VASliceParameterBuffer element
*
* - encoding: unused
* - decoding: Set by libavcodec
*/
attribute_deprecated
unsigned int slice_param_size;
/**
* Size of pre-allocated slice_params
*
* - encoding: unused
* - decoding: Set by libavcodec
*/
attribute_deprecated
unsigned int slice_params_alloc;
/**
* Number of slices currently filled in
*
* - encoding: unused
* - decoding: Set by libavcodec
*/
attribute_deprecated
unsigned int slice_count;
/**
* Pointer to slice data buffer base
* - encoding: unused
* - decoding: Set by libavcodec
*/
attribute_deprecated
const uint8_t *slice_data;
/**
* Current size of slice data
*
* - encoding: unused
* - decoding: Set by libavcodec
*/
attribute_deprecated
uint32_t slice_data_size;
#endif
};
/* @} */
#endif /* FF_API_STRUCT_VAAPI_CONTEXT */
#endif /* AVCODEC_VAAPI_H */

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/*
* VDA HW acceleration
*
* copyright (c) 2011 Sebastien Zwickert
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_VDA_H
#define AVCODEC_VDA_H
/**
* @file
* @ingroup lavc_codec_hwaccel_vda
* Public libavcodec VDA header.
*/
#include "libavcodec/avcodec.h"
#include <stdint.h>
// emmintrin.h is unable to compile with -std=c99 -Werror=missing-prototypes
// http://openradar.appspot.com/8026390
#undef __GNUC_STDC_INLINE__
#define Picture QuickdrawPicture
#include <VideoDecodeAcceleration/VDADecoder.h>
#undef Picture
#include "libavcodec/version.h"
// extra flags not defined in VDADecoder.h
enum {
kVDADecodeInfo_Asynchronous = 1UL << 0,
kVDADecodeInfo_FrameDropped = 1UL << 1
};
/**
* @defgroup lavc_codec_hwaccel_vda VDA
* @ingroup lavc_codec_hwaccel
*
* @{
*/
/**
* This structure is used to provide the necessary configurations and data
* to the VDA FFmpeg HWAccel implementation.
*
* The application must make it available as AVCodecContext.hwaccel_context.
*/
struct vda_context {
/**
* VDA decoder object.
*
* - encoding: unused
* - decoding: Set/Unset by libavcodec.
*/
VDADecoder decoder;
/**
* The Core Video pixel buffer that contains the current image data.
*
* encoding: unused
* decoding: Set by libavcodec. Unset by user.
*/
CVPixelBufferRef cv_buffer;
/**
* Use the hardware decoder in synchronous mode.
*
* encoding: unused
* decoding: Set by user.
*/
int use_sync_decoding;
/**
* The frame width.
*
* - encoding: unused
* - decoding: Set/Unset by user.
*/
int width;
/**
* The frame height.
*
* - encoding: unused
* - decoding: Set/Unset by user.
*/
int height;
/**
* The frame format.
*
* - encoding: unused
* - decoding: Set/Unset by user.
*/
int format;
/**
* The pixel format for output image buffers.
*
* - encoding: unused
* - decoding: Set/Unset by user.
*/
OSType cv_pix_fmt_type;
/**
* unused
*/
uint8_t *priv_bitstream;
/**
* unused
*/
int priv_bitstream_size;
/**
* unused
*/
int priv_allocated_size;
/**
* Use av_buffer to manage buffer.
* When the flag is set, the CVPixelBuffers returned by the decoder will
* be released automatically, so you have to retain them if necessary.
* Not setting this flag may cause memory leak.
*
* encoding: unused
* decoding: Set by user.
*/
int use_ref_buffer;
};
/** Create the video decoder. */
int ff_vda_create_decoder(struct vda_context *vda_ctx,
uint8_t *extradata,
int extradata_size);
/** Destroy the video decoder. */
int ff_vda_destroy_decoder(struct vda_context *vda_ctx);
/**
* This struct holds all the information that needs to be passed
* between the caller and libavcodec for initializing VDA decoding.
* Its size is not a part of the public ABI, it must be allocated with
* av_vda_alloc_context() and freed with av_free().
*/
typedef struct AVVDAContext {
/**
* VDA decoder object. Created and freed by the caller.
*/
VDADecoder decoder;
/**
* The output callback that must be passed to VDADecoderCreate.
* Set by av_vda_alloc_context().
*/
VDADecoderOutputCallback output_callback;
/**
* CVPixelBuffer Format Type that VDA will use for decoded frames; set by
* the caller.
*/
OSType cv_pix_fmt_type;
} AVVDAContext;
/**
* Allocate and initialize a VDA context.
*
* This function should be called from the get_format() callback when the caller
* selects the AV_PIX_FMT_VDA format. The caller must then create the decoder
* object (using the output callback provided by libavcodec) that will be used
* for VDA-accelerated decoding.
*
* When decoding with VDA is finished, the caller must destroy the decoder
* object and free the VDA context using av_free().
*
* @return the newly allocated context or NULL on failure
*/
AVVDAContext *av_vda_alloc_context(void);
/**
* This is a convenience function that creates and sets up the VDA context using
* an internal implementation.
*
* @param avctx the corresponding codec context
*
* @return >= 0 on success, a negative AVERROR code on failure
*/
int av_vda_default_init(AVCodecContext *avctx);
/**
* This is a convenience function that creates and sets up the VDA context using
* an internal implementation.
*
* @param avctx the corresponding codec context
* @param vdactx the VDA context to use
*
* @return >= 0 on success, a negative AVERROR code on failure
*/
int av_vda_default_init2(AVCodecContext *avctx, AVVDAContext *vdactx);
/**
* This function must be called to free the VDA context initialized with
* av_vda_default_init().
*
* @param avctx the corresponding codec context
*/
void av_vda_default_free(AVCodecContext *avctx);
/**
* @}
*/
#endif /* AVCODEC_VDA_H */

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/*
* The Video Decode and Presentation API for UNIX (VDPAU) is used for
* hardware-accelerated decoding of MPEG-1/2, H.264 and VC-1.
*
* Copyright (C) 2008 NVIDIA
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_VDPAU_H
#define AVCODEC_VDPAU_H
/**
* @file
* @ingroup lavc_codec_hwaccel_vdpau
* Public libavcodec VDPAU header.
*/
/**
* @defgroup lavc_codec_hwaccel_vdpau VDPAU Decoder and Renderer
* @ingroup lavc_codec_hwaccel
*
* VDPAU hardware acceleration has two modules
* - VDPAU decoding
* - VDPAU presentation
*
* The VDPAU decoding module parses all headers using FFmpeg
* parsing mechanisms and uses VDPAU for the actual decoding.
*
* As per the current implementation, the actual decoding
* and rendering (API calls) are done as part of the VDPAU
* presentation (vo_vdpau.c) module.
*
* @{
*/
#include <vdpau/vdpau.h>
#include "libavutil/avconfig.h"
#include "libavutil/attributes.h"
#include "avcodec.h"
#include "version.h"
#if FF_API_BUFS_VDPAU
union AVVDPAUPictureInfo {
VdpPictureInfoH264 h264;
VdpPictureInfoMPEG1Or2 mpeg;
VdpPictureInfoVC1 vc1;
VdpPictureInfoMPEG4Part2 mpeg4;
};
#endif
struct AVCodecContext;
struct AVFrame;
typedef int (*AVVDPAU_Render2)(struct AVCodecContext *, struct AVFrame *,
const VdpPictureInfo *, uint32_t,
const VdpBitstreamBuffer *);
/**
* This structure is used to share data between the libavcodec library and
* the client video application.
* The user shall allocate the structure via the av_alloc_vdpau_hwaccel
* function and make it available as
* AVCodecContext.hwaccel_context. Members can be set by the user once
* during initialization or through each AVCodecContext.get_buffer()
* function call. In any case, they must be valid prior to calling
* decoding functions.
*
* The size of this structure is not a part of the public ABI and must not
* be used outside of libavcodec. Use av_vdpau_alloc_context() to allocate an
* AVVDPAUContext.
*/
typedef struct AVVDPAUContext {
/**
* VDPAU decoder handle
*
* Set by user.
*/
VdpDecoder decoder;
/**
* VDPAU decoder render callback
*
* Set by the user.
*/
VdpDecoderRender *render;
#if FF_API_BUFS_VDPAU
/**
* VDPAU picture information
*
* Set by libavcodec.
*/
attribute_deprecated
union AVVDPAUPictureInfo info;
/**
* Allocated size of the bitstream_buffers table.
*
* Set by libavcodec.
*/
attribute_deprecated
int bitstream_buffers_allocated;
/**
* Useful bitstream buffers in the bitstream buffers table.
*
* Set by libavcodec.
*/
attribute_deprecated
int bitstream_buffers_used;
/**
* Table of bitstream buffers.
* The user is responsible for freeing this buffer using av_freep().
*
* Set by libavcodec.
*/
attribute_deprecated
VdpBitstreamBuffer *bitstream_buffers;
#endif
AVVDPAU_Render2 render2;
} AVVDPAUContext;
/**
* @brief allocation function for AVVDPAUContext
*
* Allows extending the struct without breaking API/ABI
*/
AVVDPAUContext *av_alloc_vdpaucontext(void);
AVVDPAU_Render2 av_vdpau_hwaccel_get_render2(const AVVDPAUContext *);
void av_vdpau_hwaccel_set_render2(AVVDPAUContext *, AVVDPAU_Render2);
/**
* Associate a VDPAU device with a codec context for hardware acceleration.
* This function is meant to be called from the get_format() codec callback,
* or earlier. It can also be called after avcodec_flush_buffers() to change
* the underlying VDPAU device mid-stream (e.g. to recover from non-transparent
* display preemption).
*
* @note get_format() must return AV_PIX_FMT_VDPAU if this function completes
* successfully.
*
* @param avctx decoding context whose get_format() callback is invoked
* @param device VDPAU device handle to use for hardware acceleration
* @param get_proc_address VDPAU device driver
* @param flags zero of more OR'd AV_HWACCEL_FLAG_* flags
*
* @return 0 on success, an AVERROR code on failure.
*/
int av_vdpau_bind_context(AVCodecContext *avctx, VdpDevice device,
VdpGetProcAddress *get_proc_address, unsigned flags);
/**
* Gets the parameters to create an adequate VDPAU video surface for the codec
* context using VDPAU hardware decoding acceleration.
*
* @note Behavior is undefined if the context was not successfully bound to a
* VDPAU device using av_vdpau_bind_context().
*
* @param avctx the codec context being used for decoding the stream
* @param type storage space for the VDPAU video surface chroma type
* (or NULL to ignore)
* @param width storage space for the VDPAU video surface pixel width
* (or NULL to ignore)
* @param height storage space for the VDPAU video surface pixel height
* (or NULL to ignore)
*
* @return 0 on success, a negative AVERROR code on failure.
*/
int av_vdpau_get_surface_parameters(AVCodecContext *avctx, VdpChromaType *type,
uint32_t *width, uint32_t *height);
/**
* Allocate an AVVDPAUContext.
*
* @return Newly-allocated AVVDPAUContext or NULL on failure.
*/
AVVDPAUContext *av_vdpau_alloc_context(void);
#if FF_API_VDPAU_PROFILE
/**
* Get a decoder profile that should be used for initializing a VDPAU decoder.
* Should be called from the AVCodecContext.get_format() callback.
*
* @deprecated Use av_vdpau_bind_context() instead.
*
* @param avctx the codec context being used for decoding the stream
* @param profile a pointer into which the result will be written on success.
* The contents of profile are undefined if this function returns
* an error.
*
* @return 0 on success (non-negative), a negative AVERROR on failure.
*/
attribute_deprecated
int av_vdpau_get_profile(AVCodecContext *avctx, VdpDecoderProfile *profile);
#endif
#if FF_API_CAP_VDPAU
/** @brief The videoSurface is used for rendering. */
#define FF_VDPAU_STATE_USED_FOR_RENDER 1
/**
* @brief The videoSurface is needed for reference/prediction.
* The codec manipulates this.
*/
#define FF_VDPAU_STATE_USED_FOR_REFERENCE 2
/**
* @brief This structure is used as a callback between the FFmpeg
* decoder (vd_) and presentation (vo_) module.
* This is used for defining a video frame containing surface,
* picture parameter, bitstream information etc which are passed
* between the FFmpeg decoder and its clients.
*/
struct vdpau_render_state {
VdpVideoSurface surface; ///< Used as rendered surface, never changed.
int state; ///< Holds FF_VDPAU_STATE_* values.
/** picture parameter information for all supported codecs */
union AVVDPAUPictureInfo info;
/** Describe size/location of the compressed video data.
Set to 0 when freeing bitstream_buffers. */
int bitstream_buffers_allocated;
int bitstream_buffers_used;
/** The user is responsible for freeing this buffer using av_freep(). */
VdpBitstreamBuffer *bitstream_buffers;
};
#endif
/* @}*/
#endif /* AVCODEC_VDPAU_H */

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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_VERSION_H
#define AVCODEC_VERSION_H
/**
* @file
* @ingroup libavc
* Libavcodec version macros.
*/
#include "libavutil/version.h"
#define LIBAVCODEC_VERSION_MAJOR 57
#define LIBAVCODEC_VERSION_MINOR 107
#define LIBAVCODEC_VERSION_MICRO 100
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
LIBAVCODEC_VERSION_MINOR, \
LIBAVCODEC_VERSION_MICRO)
#define LIBAVCODEC_VERSION AV_VERSION(LIBAVCODEC_VERSION_MAJOR, \
LIBAVCODEC_VERSION_MINOR, \
LIBAVCODEC_VERSION_MICRO)
#define LIBAVCODEC_BUILD LIBAVCODEC_VERSION_INT
#define LIBAVCODEC_IDENT "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
/**
* FF_API_* defines may be placed below to indicate public API that will be
* dropped at a future version bump. The defines themselves are not part of
* the public API and may change, break or disappear at any time.
*
* @note, when bumping the major version it is recommended to manually
* disable each FF_API_* in its own commit instead of disabling them all
* at once through the bump. This improves the git bisect-ability of the change.
*/
#ifndef FF_API_VIMA_DECODER
#define FF_API_VIMA_DECODER (LIBAVCODEC_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_AUDIO_CONVERT
#define FF_API_AUDIO_CONVERT (LIBAVCODEC_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_AVCODEC_RESAMPLE
#define FF_API_AVCODEC_RESAMPLE FF_API_AUDIO_CONVERT
#endif
#ifndef FF_API_MISSING_SAMPLE
#define FF_API_MISSING_SAMPLE (LIBAVCODEC_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_LOWRES
#define FF_API_LOWRES (LIBAVCODEC_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_CAP_VDPAU
#define FF_API_CAP_VDPAU (LIBAVCODEC_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_BUFS_VDPAU
#define FF_API_BUFS_VDPAU (LIBAVCODEC_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_VOXWARE
#define FF_API_VOXWARE (LIBAVCODEC_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_SET_DIMENSIONS
#define FF_API_SET_DIMENSIONS (LIBAVCODEC_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_DEBUG_MV
#define FF_API_DEBUG_MV (LIBAVCODEC_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_AC_VLC
#define FF_API_AC_VLC (LIBAVCODEC_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_OLD_MSMPEG4
#define FF_API_OLD_MSMPEG4 (LIBAVCODEC_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_ASPECT_EXTENDED
#define FF_API_ASPECT_EXTENDED (LIBAVCODEC_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_ARCH_ALPHA
#define FF_API_ARCH_ALPHA (LIBAVCODEC_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_XVMC
#define FF_API_XVMC (LIBAVCODEC_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_ERROR_RATE
#define FF_API_ERROR_RATE (LIBAVCODEC_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_QSCALE_TYPE
#define FF_API_QSCALE_TYPE (LIBAVCODEC_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_MB_TYPE
#define FF_API_MB_TYPE (LIBAVCODEC_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_MAX_BFRAMES
#define FF_API_MAX_BFRAMES (LIBAVCODEC_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_NEG_LINESIZES
#define FF_API_NEG_LINESIZES (LIBAVCODEC_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_EMU_EDGE
#define FF_API_EMU_EDGE (LIBAVCODEC_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_ARCH_SH4
#define FF_API_ARCH_SH4 (LIBAVCODEC_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_ARCH_SPARC
#define FF_API_ARCH_SPARC (LIBAVCODEC_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_UNUSED_MEMBERS
#define FF_API_UNUSED_MEMBERS (LIBAVCODEC_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_IDCT_XVIDMMX
#define FF_API_IDCT_XVIDMMX (LIBAVCODEC_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_INPUT_PRESERVED
#define FF_API_INPUT_PRESERVED (LIBAVCODEC_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_NORMALIZE_AQP
#define FF_API_NORMALIZE_AQP (LIBAVCODEC_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_GMC
#define FF_API_GMC (LIBAVCODEC_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_MV0
#define FF_API_MV0 (LIBAVCODEC_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_CODEC_NAME
#define FF_API_CODEC_NAME (LIBAVCODEC_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_AFD
#define FF_API_AFD (LIBAVCODEC_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_VISMV
/* XXX: don't forget to drop the -vismv documentation */
#define FF_API_VISMV (LIBAVCODEC_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_AUDIOENC_DELAY
#define FF_API_AUDIOENC_DELAY (LIBAVCODEC_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_VAAPI_CONTEXT
#define FF_API_VAAPI_CONTEXT (LIBAVCODEC_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_MERGE_SD
#define FF_API_MERGE_SD (LIBAVCODEC_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_AVCTX_TIMEBASE
#define FF_API_AVCTX_TIMEBASE (LIBAVCODEC_VERSION_MAJOR < 59)
#endif
#ifndef FF_API_MPV_OPT
#define FF_API_MPV_OPT (LIBAVCODEC_VERSION_MAJOR < 59)
#endif
#ifndef FF_API_STREAM_CODEC_TAG
#define FF_API_STREAM_CODEC_TAG (LIBAVCODEC_VERSION_MAJOR < 59)
#endif
#ifndef FF_API_QUANT_BIAS
#define FF_API_QUANT_BIAS (LIBAVCODEC_VERSION_MAJOR < 59)
#endif
#ifndef FF_API_RC_STRATEGY
#define FF_API_RC_STRATEGY (LIBAVCODEC_VERSION_MAJOR < 59)
#endif
#ifndef FF_API_CODED_FRAME
#define FF_API_CODED_FRAME (LIBAVCODEC_VERSION_MAJOR < 59)
#endif
#ifndef FF_API_MOTION_EST
#define FF_API_MOTION_EST (LIBAVCODEC_VERSION_MAJOR < 59)
#endif
#ifndef FF_API_WITHOUT_PREFIX
#define FF_API_WITHOUT_PREFIX (LIBAVCODEC_VERSION_MAJOR < 59)
#endif
#ifndef FF_API_SIDEDATA_ONLY_PKT
#define FF_API_SIDEDATA_ONLY_PKT (LIBAVCODEC_VERSION_MAJOR < 59)
#endif
#ifndef FF_API_VDPAU_PROFILE
#define FF_API_VDPAU_PROFILE (LIBAVCODEC_VERSION_MAJOR < 59)
#endif
#ifndef FF_API_CONVERGENCE_DURATION
#define FF_API_CONVERGENCE_DURATION (LIBAVCODEC_VERSION_MAJOR < 59)
#endif
#ifndef FF_API_AVPICTURE
#define FF_API_AVPICTURE (LIBAVCODEC_VERSION_MAJOR < 59)
#endif
#ifndef FF_API_AVPACKET_OLD_API
#define FF_API_AVPACKET_OLD_API (LIBAVCODEC_VERSION_MAJOR < 59)
#endif
#ifndef FF_API_RTP_CALLBACK
#define FF_API_RTP_CALLBACK (LIBAVCODEC_VERSION_MAJOR < 59)
#endif
#ifndef FF_API_VBV_DELAY
#define FF_API_VBV_DELAY (LIBAVCODEC_VERSION_MAJOR < 59)
#endif
#ifndef FF_API_CODER_TYPE
#define FF_API_CODER_TYPE (LIBAVCODEC_VERSION_MAJOR < 59)
#endif
#ifndef FF_API_STAT_BITS
#define FF_API_STAT_BITS (LIBAVCODEC_VERSION_MAJOR < 59)
#endif
#ifndef FF_API_PRIVATE_OPT
#define FF_API_PRIVATE_OPT (LIBAVCODEC_VERSION_MAJOR < 59)
#endif
#ifndef FF_API_ASS_TIMING
#define FF_API_ASS_TIMING (LIBAVCODEC_VERSION_MAJOR < 59)
#endif
#ifndef FF_API_OLD_BSF
#define FF_API_OLD_BSF (LIBAVCODEC_VERSION_MAJOR < 59)
#endif
#ifndef FF_API_COPY_CONTEXT
#define FF_API_COPY_CONTEXT (LIBAVCODEC_VERSION_MAJOR < 59)
#endif
#ifndef FF_API_GET_CONTEXT_DEFAULTS
#define FF_API_GET_CONTEXT_DEFAULTS (LIBAVCODEC_VERSION_MAJOR < 59)
#endif
#ifndef FF_API_NVENC_OLD_NAME
#define FF_API_NVENC_OLD_NAME (LIBAVCODEC_VERSION_MAJOR < 59)
#endif
#ifndef FF_API_STRUCT_VAAPI_CONTEXT
#define FF_API_STRUCT_VAAPI_CONTEXT (LIBAVCODEC_VERSION_MAJOR < 59)
#endif
#ifndef FF_API_MERGE_SD_API
#define FF_API_MERGE_SD_API (LIBAVCODEC_VERSION_MAJOR < 59)
#endif
#ifndef FF_API_TAG_STRING
#define FF_API_TAG_STRING (LIBAVCODEC_VERSION_MAJOR < 59)
#endif
#ifndef FF_API_GETCHROMA
#define FF_API_GETCHROMA (LIBAVCODEC_VERSION_MAJOR < 59)
#endif
#endif /* AVCODEC_VERSION_H */

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/*
* Videotoolbox hardware acceleration
*
* copyright (c) 2012 Sebastien Zwickert
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_VIDEOTOOLBOX_H
#define AVCODEC_VIDEOTOOLBOX_H
/**
* @file
* @ingroup lavc_codec_hwaccel_videotoolbox
* Public libavcodec Videotoolbox header.
*/
#include <stdint.h>
#define Picture QuickdrawPicture
#include <VideoToolbox/VideoToolbox.h>
#undef Picture
#include "libavcodec/avcodec.h"
/**
* This struct holds all the information that needs to be passed
* between the caller and libavcodec for initializing Videotoolbox decoding.
* Its size is not a part of the public ABI, it must be allocated with
* av_videotoolbox_alloc_context() and freed with av_free().
*/
typedef struct AVVideotoolboxContext {
/**
* Videotoolbox decompression session object.
* Created and freed the caller.
*/
VTDecompressionSessionRef session;
/**
* The output callback that must be passed to the session.
* Set by av_videottoolbox_default_init()
*/
VTDecompressionOutputCallback output_callback;
/**
* CVPixelBuffer Format Type that Videotoolbox will use for decoded frames.
* set by the caller. If this is set to 0, then no specific format is
* requested from the decoder, and its native format is output.
*/
OSType cv_pix_fmt_type;
/**
* CoreMedia Format Description that Videotoolbox will use to create the decompression session.
* Set by the caller.
*/
CMVideoFormatDescriptionRef cm_fmt_desc;
/**
* CoreMedia codec type that Videotoolbox will use to create the decompression session.
* Set by the caller.
*/
int cm_codec_type;
} AVVideotoolboxContext;
/**
* Allocate and initialize a Videotoolbox context.
*
* This function should be called from the get_format() callback when the caller
* selects the AV_PIX_FMT_VIDETOOLBOX format. The caller must then create
* the decoder object (using the output callback provided by libavcodec) that
* will be used for Videotoolbox-accelerated decoding.
*
* When decoding with Videotoolbox is finished, the caller must destroy the decoder
* object and free the Videotoolbox context using av_free().
*
* @return the newly allocated context or NULL on failure
*/
AVVideotoolboxContext *av_videotoolbox_alloc_context(void);
/**
* This is a convenience function that creates and sets up the Videotoolbox context using
* an internal implementation.
*
* @param avctx the corresponding codec context
*
* @return >= 0 on success, a negative AVERROR code on failure
*/
int av_videotoolbox_default_init(AVCodecContext *avctx);
/**
* This is a convenience function that creates and sets up the Videotoolbox context using
* an internal implementation.
*
* @param avctx the corresponding codec context
* @param vtctx the Videotoolbox context to use
*
* @return >= 0 on success, a negative AVERROR code on failure
*/
int av_videotoolbox_default_init2(AVCodecContext *avctx, AVVideotoolboxContext *vtctx);
/**
* This function must be called to free the Videotoolbox context initialized with
* av_videotoolbox_default_init().
*
* @param avctx the corresponding codec context
*/
void av_videotoolbox_default_free(AVCodecContext *avctx);
/**
* @}
*/
#endif /* AVCODEC_VIDEOTOOLBOX_H */

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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* A public API for Vorbis parsing
*
* Determines the duration for each packet.
*/
#ifndef AVCODEC_VORBIS_PARSER_H
#define AVCODEC_VORBIS_PARSER_H
#include <stdint.h>
typedef struct AVVorbisParseContext AVVorbisParseContext;
/**
* Allocate and initialize the Vorbis parser using headers in the extradata.
*/
AVVorbisParseContext *av_vorbis_parse_init(const uint8_t *extradata,
int extradata_size);
/**
* Free the parser and everything associated with it.
*/
void av_vorbis_parse_free(AVVorbisParseContext **s);
#define VORBIS_FLAG_HEADER 0x00000001
#define VORBIS_FLAG_COMMENT 0x00000002
#define VORBIS_FLAG_SETUP 0x00000004
/**
* Get the duration for a Vorbis packet.
*
* If @p flags is @c NULL,
* special frames are considered invalid.
*
* @param s Vorbis parser context
* @param buf buffer containing a Vorbis frame
* @param buf_size size of the buffer
* @param flags flags for special frames
*/
int av_vorbis_parse_frame_flags(AVVorbisParseContext *s, const uint8_t *buf,
int buf_size, int *flags);
/**
* Get the duration for a Vorbis packet.
*
* @param s Vorbis parser context
* @param buf buffer containing a Vorbis frame
* @param buf_size size of the buffer
*/
int av_vorbis_parse_frame(AVVorbisParseContext *s, const uint8_t *buf,
int buf_size);
void av_vorbis_parse_reset(AVVorbisParseContext *s);
#endif /* AVCODEC_VORBIS_PARSER_H */

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/*
* Copyright (C) 2003 Ivan Kalvachev
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_XVMC_H
#define AVCODEC_XVMC_H
/**
* @file
* @ingroup lavc_codec_hwaccel_xvmc
* Public libavcodec XvMC header.
*/
#include <X11/extensions/XvMC.h>
#include "libavutil/attributes.h"
#include "version.h"
#include "avcodec.h"
/**
* @defgroup lavc_codec_hwaccel_xvmc XvMC
* @ingroup lavc_codec_hwaccel
*
* @{
*/
#define AV_XVMC_ID 0x1DC711C0 /**< special value to ensure that regular pixel routines haven't corrupted the struct
the number is 1337 speak for the letters IDCT MCo (motion compensation) */
struct attribute_deprecated xvmc_pix_fmt {
/** The field contains the special constant value AV_XVMC_ID.
It is used as a test that the application correctly uses the API,
and that there is no corruption caused by pixel routines.
- application - set during initialization
- libavcodec - unchanged
*/
int xvmc_id;
/** Pointer to the block array allocated by XvMCCreateBlocks().
The array has to be freed by XvMCDestroyBlocks().
Each group of 64 values represents one data block of differential
pixel information (in MoCo mode) or coefficients for IDCT.
- application - set the pointer during initialization
- libavcodec - fills coefficients/pixel data into the array
*/
short* data_blocks;
/** Pointer to the macroblock description array allocated by
XvMCCreateMacroBlocks() and freed by XvMCDestroyMacroBlocks().
- application - set the pointer during initialization
- libavcodec - fills description data into the array
*/
XvMCMacroBlock* mv_blocks;
/** Number of macroblock descriptions that can be stored in the mv_blocks
array.
- application - set during initialization
- libavcodec - unchanged
*/
int allocated_mv_blocks;
/** Number of blocks that can be stored at once in the data_blocks array.
- application - set during initialization
- libavcodec - unchanged
*/
int allocated_data_blocks;
/** Indicate that the hardware would interpret data_blocks as IDCT
coefficients and perform IDCT on them.
- application - set during initialization
- libavcodec - unchanged
*/
int idct;
/** In MoCo mode it indicates that intra macroblocks are assumed to be in
unsigned format; same as the XVMC_INTRA_UNSIGNED flag.
- application - set during initialization
- libavcodec - unchanged
*/
int unsigned_intra;
/** Pointer to the surface allocated by XvMCCreateSurface().
It has to be freed by XvMCDestroySurface() on application exit.
It identifies the frame and its state on the video hardware.
- application - set during initialization
- libavcodec - unchanged
*/
XvMCSurface* p_surface;
/** Set by the decoder before calling ff_draw_horiz_band(),
needed by the XvMCRenderSurface function. */
//@{
/** Pointer to the surface used as past reference
- application - unchanged
- libavcodec - set
*/
XvMCSurface* p_past_surface;
/** Pointer to the surface used as future reference
- application - unchanged
- libavcodec - set
*/
XvMCSurface* p_future_surface;
/** top/bottom field or frame
- application - unchanged
- libavcodec - set
*/
unsigned int picture_structure;
/** XVMC_SECOND_FIELD - 1st or 2nd field in the sequence
- application - unchanged
- libavcodec - set
*/
unsigned int flags;
//}@
/** Number of macroblock descriptions in the mv_blocks array
that have already been passed to the hardware.
- application - zeroes it on get_buffer().
A successful ff_draw_horiz_band() may increment it
with filled_mb_block_num or zero both.
- libavcodec - unchanged
*/
int start_mv_blocks_num;
/** Number of new macroblock descriptions in the mv_blocks array (after
start_mv_blocks_num) that are filled by libavcodec and have to be
passed to the hardware.
- application - zeroes it on get_buffer() or after successful
ff_draw_horiz_band().
- libavcodec - increment with one of each stored MB
*/
int filled_mv_blocks_num;
/** Number of the next free data block; one data block consists of
64 short values in the data_blocks array.
All blocks before this one have already been claimed by placing their
position into the corresponding block description structure field,
that are part of the mv_blocks array.
- application - zeroes it on get_buffer().
A successful ff_draw_horiz_band() may zero it together
with start_mb_blocks_num.
- libavcodec - each decoded macroblock increases it by the number
of coded blocks it contains.
*/
int next_free_data_block_num;
};
/**
* @}
*/
#endif /* AVCODEC_XVMC_H */

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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVDEVICE_AVDEVICE_H
#define AVDEVICE_AVDEVICE_H
#include "version.h"
/**
* @file
* @ingroup lavd
* Main libavdevice API header
*/
/**
* @defgroup lavd libavdevice
* Special devices muxing/demuxing library.
*
* Libavdevice is a complementary library to @ref libavf "libavformat". It
* provides various "special" platform-specific muxers and demuxers, e.g. for
* grabbing devices, audio capture and playback etc. As a consequence, the
* (de)muxers in libavdevice are of the AVFMT_NOFILE type (they use their own
* I/O functions). The filename passed to avformat_open_input() often does not
* refer to an actually existing file, but has some special device-specific
* meaning - e.g. for xcbgrab it is the display name.
*
* To use libavdevice, simply call avdevice_register_all() to register all
* compiled muxers and demuxers. They all use standard libavformat API.
*
* @{
*/
#include "libavutil/log.h"
#include "libavutil/opt.h"
#include "libavutil/dict.h"
#include "libavformat/avformat.h"
/**
* Return the LIBAVDEVICE_VERSION_INT constant.
*/
unsigned avdevice_version(void);
/**
* Return the libavdevice build-time configuration.
*/
const char *avdevice_configuration(void);
/**
* Return the libavdevice license.
*/
const char *avdevice_license(void);
/**
* Initialize libavdevice and register all the input and output devices.
*/
void avdevice_register_all(void);
/**
* Audio input devices iterator.
*
* If d is NULL, returns the first registered input audio/video device,
* if d is non-NULL, returns the next registered input audio/video device after d
* or NULL if d is the last one.
*/
AVInputFormat *av_input_audio_device_next(AVInputFormat *d);
/**
* Video input devices iterator.
*
* If d is NULL, returns the first registered input audio/video device,
* if d is non-NULL, returns the next registered input audio/video device after d
* or NULL if d is the last one.
*/
AVInputFormat *av_input_video_device_next(AVInputFormat *d);
/**
* Audio output devices iterator.
*
* If d is NULL, returns the first registered output audio/video device,
* if d is non-NULL, returns the next registered output audio/video device after d
* or NULL if d is the last one.
*/
AVOutputFormat *av_output_audio_device_next(AVOutputFormat *d);
/**
* Video output devices iterator.
*
* If d is NULL, returns the first registered output audio/video device,
* if d is non-NULL, returns the next registered output audio/video device after d
* or NULL if d is the last one.
*/
AVOutputFormat *av_output_video_device_next(AVOutputFormat *d);
typedef struct AVDeviceRect {
int x; /**< x coordinate of top left corner */
int y; /**< y coordinate of top left corner */
int width; /**< width */
int height; /**< height */
} AVDeviceRect;
/**
* Message types used by avdevice_app_to_dev_control_message().
*/
enum AVAppToDevMessageType {
/**
* Dummy message.
*/
AV_APP_TO_DEV_NONE = MKBETAG('N','O','N','E'),
/**
* Window size change message.
*
* Message is sent to the device every time the application changes the size
* of the window device renders to.
* Message should also be sent right after window is created.
*
* data: AVDeviceRect: new window size.
*/
AV_APP_TO_DEV_WINDOW_SIZE = MKBETAG('G','E','O','M'),
/**
* Repaint request message.
*
* Message is sent to the device when window has to be repainted.
*
* data: AVDeviceRect: area required to be repainted.
* NULL: whole area is required to be repainted.
*/
AV_APP_TO_DEV_WINDOW_REPAINT = MKBETAG('R','E','P','A'),
/**
* Request pause/play.
*
* Application requests pause/unpause playback.
* Mostly usable with devices that have internal buffer.
* By default devices are not paused.
*
* data: NULL
*/
AV_APP_TO_DEV_PAUSE = MKBETAG('P', 'A', 'U', ' '),
AV_APP_TO_DEV_PLAY = MKBETAG('P', 'L', 'A', 'Y'),
AV_APP_TO_DEV_TOGGLE_PAUSE = MKBETAG('P', 'A', 'U', 'T'),
/**
* Volume control message.
*
* Set volume level. It may be device-dependent if volume
* is changed per stream or system wide. Per stream volume
* change is expected when possible.
*
* data: double: new volume with range of 0.0 - 1.0.
*/
AV_APP_TO_DEV_SET_VOLUME = MKBETAG('S', 'V', 'O', 'L'),
/**
* Mute control messages.
*
* Change mute state. It may be device-dependent if mute status
* is changed per stream or system wide. Per stream mute status
* change is expected when possible.
*
* data: NULL.
*/
AV_APP_TO_DEV_MUTE = MKBETAG(' ', 'M', 'U', 'T'),
AV_APP_TO_DEV_UNMUTE = MKBETAG('U', 'M', 'U', 'T'),
AV_APP_TO_DEV_TOGGLE_MUTE = MKBETAG('T', 'M', 'U', 'T'),
/**
* Get volume/mute messages.
*
* Force the device to send AV_DEV_TO_APP_VOLUME_LEVEL_CHANGED or
* AV_DEV_TO_APP_MUTE_STATE_CHANGED command respectively.
*
* data: NULL.
*/
AV_APP_TO_DEV_GET_VOLUME = MKBETAG('G', 'V', 'O', 'L'),
AV_APP_TO_DEV_GET_MUTE = MKBETAG('G', 'M', 'U', 'T'),
};
/**
* Message types used by avdevice_dev_to_app_control_message().
*/
enum AVDevToAppMessageType {
/**
* Dummy message.
*/
AV_DEV_TO_APP_NONE = MKBETAG('N','O','N','E'),
/**
* Create window buffer message.
*
* Device requests to create a window buffer. Exact meaning is device-
* and application-dependent. Message is sent before rendering first
* frame and all one-shot initializations should be done here.
* Application is allowed to ignore preferred window buffer size.
*
* @note: Application is obligated to inform about window buffer size
* with AV_APP_TO_DEV_WINDOW_SIZE message.
*
* data: AVDeviceRect: preferred size of the window buffer.
* NULL: no preferred size of the window buffer.
*/
AV_DEV_TO_APP_CREATE_WINDOW_BUFFER = MKBETAG('B','C','R','E'),
/**
* Prepare window buffer message.
*
* Device requests to prepare a window buffer for rendering.
* Exact meaning is device- and application-dependent.
* Message is sent before rendering of each frame.
*
* data: NULL.
*/
AV_DEV_TO_APP_PREPARE_WINDOW_BUFFER = MKBETAG('B','P','R','E'),
/**
* Display window buffer message.
*
* Device requests to display a window buffer.
* Message is sent when new frame is ready to be displayed.
* Usually buffers need to be swapped in handler of this message.
*
* data: NULL.
*/
AV_DEV_TO_APP_DISPLAY_WINDOW_BUFFER = MKBETAG('B','D','I','S'),
/**
* Destroy window buffer message.
*
* Device requests to destroy a window buffer.
* Message is sent when device is about to be destroyed and window
* buffer is not required anymore.
*
* data: NULL.
*/
AV_DEV_TO_APP_DESTROY_WINDOW_BUFFER = MKBETAG('B','D','E','S'),
/**
* Buffer fullness status messages.
*
* Device signals buffer overflow/underflow.
*
* data: NULL.
*/
AV_DEV_TO_APP_BUFFER_OVERFLOW = MKBETAG('B','O','F','L'),
AV_DEV_TO_APP_BUFFER_UNDERFLOW = MKBETAG('B','U','F','L'),
/**
* Buffer readable/writable.
*
* Device informs that buffer is readable/writable.
* When possible, device informs how many bytes can be read/write.
*
* @warning Device may not inform when number of bytes than can be read/write changes.
*
* data: int64_t: amount of bytes available to read/write.
* NULL: amount of bytes available to read/write is not known.
*/
AV_DEV_TO_APP_BUFFER_READABLE = MKBETAG('B','R','D',' '),
AV_DEV_TO_APP_BUFFER_WRITABLE = MKBETAG('B','W','R',' '),
/**
* Mute state change message.
*
* Device informs that mute state has changed.
*
* data: int: 0 for not muted state, non-zero for muted state.
*/
AV_DEV_TO_APP_MUTE_STATE_CHANGED = MKBETAG('C','M','U','T'),
/**
* Volume level change message.
*
* Device informs that volume level has changed.
*
* data: double: new volume with range of 0.0 - 1.0.
*/
AV_DEV_TO_APP_VOLUME_LEVEL_CHANGED = MKBETAG('C','V','O','L'),
};
/**
* Send control message from application to device.
*
* @param s device context.
* @param type message type.
* @param data message data. Exact type depends on message type.
* @param data_size size of message data.
* @return >= 0 on success, negative on error.
* AVERROR(ENOSYS) when device doesn't implement handler of the message.
*/
int avdevice_app_to_dev_control_message(struct AVFormatContext *s,
enum AVAppToDevMessageType type,
void *data, size_t data_size);
/**
* Send control message from device to application.
*
* @param s device context.
* @param type message type.
* @param data message data. Can be NULL.
* @param data_size size of message data.
* @return >= 0 on success, negative on error.
* AVERROR(ENOSYS) when application doesn't implement handler of the message.
*/
int avdevice_dev_to_app_control_message(struct AVFormatContext *s,
enum AVDevToAppMessageType type,
void *data, size_t data_size);
/**
* Following API allows user to probe device capabilities (supported codecs,
* pixel formats, sample formats, resolutions, channel counts, etc).
* It is build on top op AVOption API.
* Queried capabilities make it possible to set up converters of video or audio
* parameters that fit to the device.
*
* List of capabilities that can be queried:
* - Capabilities valid for both audio and video devices:
* - codec: supported audio/video codecs.
* type: AV_OPT_TYPE_INT (AVCodecID value)
* - Capabilities valid for audio devices:
* - sample_format: supported sample formats.
* type: AV_OPT_TYPE_INT (AVSampleFormat value)
* - sample_rate: supported sample rates.
* type: AV_OPT_TYPE_INT
* - channels: supported number of channels.
* type: AV_OPT_TYPE_INT
* - channel_layout: supported channel layouts.
* type: AV_OPT_TYPE_INT64
* - Capabilities valid for video devices:
* - pixel_format: supported pixel formats.
* type: AV_OPT_TYPE_INT (AVPixelFormat value)
* - window_size: supported window sizes (describes size of the window size presented to the user).
* type: AV_OPT_TYPE_IMAGE_SIZE
* - frame_size: supported frame sizes (describes size of provided video frames).
* type: AV_OPT_TYPE_IMAGE_SIZE
* - fps: supported fps values
* type: AV_OPT_TYPE_RATIONAL
*
* Value of the capability may be set by user using av_opt_set() function
* and AVDeviceCapabilitiesQuery object. Following queries will
* limit results to the values matching already set capabilities.
* For example, setting a codec may impact number of formats or fps values
* returned during next query. Setting invalid value may limit results to zero.
*
* Example of the usage basing on opengl output device:
*
* @code
* AVFormatContext *oc = NULL;
* AVDeviceCapabilitiesQuery *caps = NULL;
* AVOptionRanges *ranges;
* int ret;
*
* if ((ret = avformat_alloc_output_context2(&oc, NULL, "opengl", NULL)) < 0)
* goto fail;
* if (avdevice_capabilities_create(&caps, oc, NULL) < 0)
* goto fail;
*
* //query codecs
* if (av_opt_query_ranges(&ranges, caps, "codec", AV_OPT_MULTI_COMPONENT_RANGE)) < 0)
* goto fail;
* //pick codec here and set it
* av_opt_set(caps, "codec", AV_CODEC_ID_RAWVIDEO, 0);
*
* //query format
* if (av_opt_query_ranges(&ranges, caps, "pixel_format", AV_OPT_MULTI_COMPONENT_RANGE)) < 0)
* goto fail;
* //pick format here and set it
* av_opt_set(caps, "pixel_format", AV_PIX_FMT_YUV420P, 0);
*
* //query and set more capabilities
*
* fail:
* //clean up code
* avdevice_capabilities_free(&query, oc);
* avformat_free_context(oc);
* @endcode
*/
/**
* Structure describes device capabilities.
*
* It is used by devices in conjunction with av_device_capabilities AVOption table
* to implement capabilities probing API based on AVOption API. Should not be used directly.
*/
typedef struct AVDeviceCapabilitiesQuery {
const AVClass *av_class;
AVFormatContext *device_context;
enum AVCodecID codec;
enum AVSampleFormat sample_format;
enum AVPixelFormat pixel_format;
int sample_rate;
int channels;
int64_t channel_layout;
int window_width;
int window_height;
int frame_width;
int frame_height;
AVRational fps;
} AVDeviceCapabilitiesQuery;
/**
* AVOption table used by devices to implement device capabilities API. Should not be used by a user.
*/
extern const AVOption av_device_capabilities[];
/**
* Initialize capabilities probing API based on AVOption API.
*
* avdevice_capabilities_free() must be called when query capabilities API is
* not used anymore.
*
* @param[out] caps Device capabilities data. Pointer to a NULL pointer must be passed.
* @param s Context of the device.
* @param device_options An AVDictionary filled with device-private options.
* On return this parameter will be destroyed and replaced with a dict
* containing options that were not found. May be NULL.
* The same options must be passed later to avformat_write_header() for output
* devices or avformat_open_input() for input devices, or at any other place
* that affects device-private options.
*
* @return >= 0 on success, negative otherwise.
*/
int avdevice_capabilities_create(AVDeviceCapabilitiesQuery **caps, AVFormatContext *s,
AVDictionary **device_options);
/**
* Free resources created by avdevice_capabilities_create()
*
* @param caps Device capabilities data to be freed.
* @param s Context of the device.
*/
void avdevice_capabilities_free(AVDeviceCapabilitiesQuery **caps, AVFormatContext *s);
/**
* Structure describes basic parameters of the device.
*/
typedef struct AVDeviceInfo {
char *device_name; /**< device name, format depends on device */
char *device_description; /**< human friendly name */
} AVDeviceInfo;
/**
* List of devices.
*/
typedef struct AVDeviceInfoList {
AVDeviceInfo **devices; /**< list of autodetected devices */
int nb_devices; /**< number of autodetected devices */
int default_device; /**< index of default device or -1 if no default */
} AVDeviceInfoList;
/**
* List devices.
*
* Returns available device names and their parameters.
*
* @note: Some devices may accept system-dependent device names that cannot be
* autodetected. The list returned by this function cannot be assumed to
* be always completed.
*
* @param s device context.
* @param[out] device_list list of autodetected devices.
* @return count of autodetected devices, negative on error.
*/
int avdevice_list_devices(struct AVFormatContext *s, AVDeviceInfoList **device_list);
/**
* Convenient function to free result of avdevice_list_devices().
*
* @param devices device list to be freed.
*/
void avdevice_free_list_devices(AVDeviceInfoList **device_list);
/**
* List devices.
*
* Returns available device names and their parameters.
* These are convinient wrappers for avdevice_list_devices().
* Device context is allocated and deallocated internally.
*
* @param device device format. May be NULL if device name is set.
* @param device_name device name. May be NULL if device format is set.
* @param device_options An AVDictionary filled with device-private options. May be NULL.
* The same options must be passed later to avformat_write_header() for output
* devices or avformat_open_input() for input devices, or at any other place
* that affects device-private options.
* @param[out] device_list list of autodetected devices
* @return count of autodetected devices, negative on error.
* @note device argument takes precedence over device_name when both are set.
*/
int avdevice_list_input_sources(struct AVInputFormat *device, const char *device_name,
AVDictionary *device_options, AVDeviceInfoList **device_list);
int avdevice_list_output_sinks(struct AVOutputFormat *device, const char *device_name,
AVDictionary *device_options, AVDeviceInfoList **device_list);
/**
* @}
*/
#endif /* AVDEVICE_AVDEVICE_H */

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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVDEVICE_VERSION_H
#define AVDEVICE_VERSION_H
/**
* @file
* @ingroup lavd
* Libavdevice version macros
*/
#include "libavutil/version.h"
#define LIBAVDEVICE_VERSION_MAJOR 57
#define LIBAVDEVICE_VERSION_MINOR 10
#define LIBAVDEVICE_VERSION_MICRO 100
#define LIBAVDEVICE_VERSION_INT AV_VERSION_INT(LIBAVDEVICE_VERSION_MAJOR, \
LIBAVDEVICE_VERSION_MINOR, \
LIBAVDEVICE_VERSION_MICRO)
#define LIBAVDEVICE_VERSION AV_VERSION(LIBAVDEVICE_VERSION_MAJOR, \
LIBAVDEVICE_VERSION_MINOR, \
LIBAVDEVICE_VERSION_MICRO)
#define LIBAVDEVICE_BUILD LIBAVDEVICE_VERSION_INT
#define LIBAVDEVICE_IDENT "Lavd" AV_STRINGIFY(LIBAVDEVICE_VERSION)
/**
* FF_API_* defines may be placed below to indicate public API that will be
* dropped at a future version bump. The defines themselves are not part of
* the public API and may change, break or disappear at any time.
*/
#endif /* AVDEVICE_VERSION_H */

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/*
* Filter graphs
* copyright (c) 2007 Bobby Bingham
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVFILTER_AVFILTERGRAPH_H
#define AVFILTER_AVFILTERGRAPH_H
#include "avfilter.h"
#include "libavutil/log.h"
#endif /* AVFILTER_AVFILTERGRAPH_H */

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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVFILTER_BUFFERSINK_H
#define AVFILTER_BUFFERSINK_H
/**
* @file
* @ingroup lavfi_buffersink
* memory buffer sink API for audio and video
*/
#include "avfilter.h"
/**
* @defgroup lavfi_buffersink Buffer sink API
* @ingroup lavfi
* @{
*/
/**
* Get a frame with filtered data from sink and put it in frame.
*
* @param ctx pointer to a buffersink or abuffersink filter context.
* @param frame pointer to an allocated frame that will be filled with data.
* The data must be freed using av_frame_unref() / av_frame_free()
* @param flags a combination of AV_BUFFERSINK_FLAG_* flags
*
* @return >= 0 in for success, a negative AVERROR code for failure.
*/
int av_buffersink_get_frame_flags(AVFilterContext *ctx, AVFrame *frame, int flags);
/**
* Tell av_buffersink_get_buffer_ref() to read video/samples buffer
* reference, but not remove it from the buffer. This is useful if you
* need only to read a video/samples buffer, without to fetch it.
*/
#define AV_BUFFERSINK_FLAG_PEEK 1
/**
* Tell av_buffersink_get_buffer_ref() not to request a frame from its input.
* If a frame is already buffered, it is read (and removed from the buffer),
* but if no frame is present, return AVERROR(EAGAIN).
*/
#define AV_BUFFERSINK_FLAG_NO_REQUEST 2
/**
* Struct to use for initializing a buffersink context.
*/
typedef struct AVBufferSinkParams {
const enum AVPixelFormat *pixel_fmts; ///< list of allowed pixel formats, terminated by AV_PIX_FMT_NONE
} AVBufferSinkParams;
/**
* Create an AVBufferSinkParams structure.
*
* Must be freed with av_free().
*/
AVBufferSinkParams *av_buffersink_params_alloc(void);
/**
* Struct to use for initializing an abuffersink context.
*/
typedef struct AVABufferSinkParams {
const enum AVSampleFormat *sample_fmts; ///< list of allowed sample formats, terminated by AV_SAMPLE_FMT_NONE
const int64_t *channel_layouts; ///< list of allowed channel layouts, terminated by -1
const int *channel_counts; ///< list of allowed channel counts, terminated by -1
int all_channel_counts; ///< if not 0, accept any channel count or layout
int *sample_rates; ///< list of allowed sample rates, terminated by -1
} AVABufferSinkParams;
/**
* Create an AVABufferSinkParams structure.
*
* Must be freed with av_free().
*/
AVABufferSinkParams *av_abuffersink_params_alloc(void);
/**
* Set the frame size for an audio buffer sink.
*
* All calls to av_buffersink_get_buffer_ref will return a buffer with
* exactly the specified number of samples, or AVERROR(EAGAIN) if there is
* not enough. The last buffer at EOF will be padded with 0.
*/
void av_buffersink_set_frame_size(AVFilterContext *ctx, unsigned frame_size);
/**
* @defgroup lavfi_buffersink_accessors Buffer sink accessors
* Get the properties of the stream
* @{
*/
enum AVMediaType av_buffersink_get_type (const AVFilterContext *ctx);
AVRational av_buffersink_get_time_base (const AVFilterContext *ctx);
int av_buffersink_get_format (const AVFilterContext *ctx);
AVRational av_buffersink_get_frame_rate (const AVFilterContext *ctx);
int av_buffersink_get_w (const AVFilterContext *ctx);
int av_buffersink_get_h (const AVFilterContext *ctx);
AVRational av_buffersink_get_sample_aspect_ratio (const AVFilterContext *ctx);
int av_buffersink_get_channels (const AVFilterContext *ctx);
uint64_t av_buffersink_get_channel_layout (const AVFilterContext *ctx);
int av_buffersink_get_sample_rate (const AVFilterContext *ctx);
AVBufferRef * av_buffersink_get_hw_frames_ctx (const AVFilterContext *ctx);
/** @} */
/**
* Get a frame with filtered data from sink and put it in frame.
*
* @param ctx pointer to a context of a buffersink or abuffersink AVFilter.
* @param frame pointer to an allocated frame that will be filled with data.
* The data must be freed using av_frame_unref() / av_frame_free()
*
* @return
* - >= 0 if a frame was successfully returned.
* - AVERROR(EAGAIN) if no frames are available at this point; more
* input frames must be added to the filtergraph to get more output.
* - AVERROR_EOF if there will be no more output frames on this sink.
* - A different negative AVERROR code in other failure cases.
*/
int av_buffersink_get_frame(AVFilterContext *ctx, AVFrame *frame);
/**
* Same as av_buffersink_get_frame(), but with the ability to specify the number
* of samples read. This function is less efficient than
* av_buffersink_get_frame(), because it copies the data around.
*
* @param ctx pointer to a context of the abuffersink AVFilter.
* @param frame pointer to an allocated frame that will be filled with data.
* The data must be freed using av_frame_unref() / av_frame_free()
* frame will contain exactly nb_samples audio samples, except at
* the end of stream, when it can contain less than nb_samples.
*
* @return The return codes have the same meaning as for
* av_buffersink_get_samples().
*
* @warning do not mix this function with av_buffersink_get_frame(). Use only one or
* the other with a single sink, not both.
*/
int av_buffersink_get_samples(AVFilterContext *ctx, AVFrame *frame, int nb_samples);
/**
* @}
*/
#endif /* AVFILTER_BUFFERSINK_H */

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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVFILTER_BUFFERSRC_H
#define AVFILTER_BUFFERSRC_H
/**
* @file
* @ingroup lavfi_buffersrc
* Memory buffer source API.
*/
#include "avfilter.h"
/**
* @defgroup lavfi_buffersrc Buffer source API
* @ingroup lavfi
* @{
*/
enum {
/**
* Do not check for format changes.
*/
AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT = 1,
/**
* Immediately push the frame to the output.
*/
AV_BUFFERSRC_FLAG_PUSH = 4,
/**
* Keep a reference to the frame.
* If the frame if reference-counted, create a new reference; otherwise
* copy the frame data.
*/
AV_BUFFERSRC_FLAG_KEEP_REF = 8,
};
/**
* Get the number of failed requests.
*
* A failed request is when the request_frame method is called while no
* frame is present in the buffer.
* The number is reset when a frame is added.
*/
unsigned av_buffersrc_get_nb_failed_requests(AVFilterContext *buffer_src);
/**
* This structure contains the parameters describing the frames that will be
* passed to this filter.
*
* It should be allocated with av_buffersrc_parameters_alloc() and freed with
* av_free(). All the allocated fields in it remain owned by the caller.
*/
typedef struct AVBufferSrcParameters {
/**
* video: the pixel format, value corresponds to enum AVPixelFormat
* audio: the sample format, value corresponds to enum AVSampleFormat
*/
int format;
/**
* The timebase to be used for the timestamps on the input frames.
*/
AVRational time_base;
/**
* Video only, the display dimensions of the input frames.
*/
int width, height;
/**
* Video only, the sample (pixel) aspect ratio.
*/
AVRational sample_aspect_ratio;
/**
* Video only, the frame rate of the input video. This field must only be
* set to a non-zero value if input stream has a known constant framerate
* and should be left at its initial value if the framerate is variable or
* unknown.
*/
AVRational frame_rate;
/**
* Video with a hwaccel pixel format only. This should be a reference to an
* AVHWFramesContext instance describing the input frames.
*/
AVBufferRef *hw_frames_ctx;
/**
* Audio only, the audio sampling rate in samples per secon.
*/
int sample_rate;
/**
* Audio only, the audio channel layout
*/
uint64_t channel_layout;
} AVBufferSrcParameters;
/**
* Allocate a new AVBufferSrcParameters instance. It should be freed by the
* caller with av_free().
*/
AVBufferSrcParameters *av_buffersrc_parameters_alloc(void);
/**
* Initialize the buffersrc or abuffersrc filter with the provided parameters.
* This function may be called multiple times, the later calls override the
* previous ones. Some of the parameters may also be set through AVOptions, then
* whatever method is used last takes precedence.
*
* @param ctx an instance of the buffersrc or abuffersrc filter
* @param param the stream parameters. The frames later passed to this filter
* must conform to those parameters. All the allocated fields in
* param remain owned by the caller, libavfilter will make internal
* copies or references when necessary.
* @return 0 on success, a negative AVERROR code on failure.
*/
int av_buffersrc_parameters_set(AVFilterContext *ctx, AVBufferSrcParameters *param);
/**
* Add a frame to the buffer source.
*
* @param ctx an instance of the buffersrc filter
* @param frame frame to be added. If the frame is reference counted, this
* function will make a new reference to it. Otherwise the frame data will be
* copied.
*
* @return 0 on success, a negative AVERROR on error
*
* This function is equivalent to av_buffersrc_add_frame_flags() with the
* AV_BUFFERSRC_FLAG_KEEP_REF flag.
*/
av_warn_unused_result
int av_buffersrc_write_frame(AVFilterContext *ctx, const AVFrame *frame);
/**
* Add a frame to the buffer source.
*
* @param ctx an instance of the buffersrc filter
* @param frame frame to be added. If the frame is reference counted, this
* function will take ownership of the reference(s) and reset the frame.
* Otherwise the frame data will be copied. If this function returns an error,
* the input frame is not touched.
*
* @return 0 on success, a negative AVERROR on error.
*
* @note the difference between this function and av_buffersrc_write_frame() is
* that av_buffersrc_write_frame() creates a new reference to the input frame,
* while this function takes ownership of the reference passed to it.
*
* This function is equivalent to av_buffersrc_add_frame_flags() without the
* AV_BUFFERSRC_FLAG_KEEP_REF flag.
*/
av_warn_unused_result
int av_buffersrc_add_frame(AVFilterContext *ctx, AVFrame *frame);
/**
* Add a frame to the buffer source.
*
* By default, if the frame is reference-counted, this function will take
* ownership of the reference(s) and reset the frame. This can be controlled
* using the flags.
*
* If this function returns an error, the input frame is not touched.
*
* @param buffer_src pointer to a buffer source context
* @param frame a frame, or NULL to mark EOF
* @param flags a combination of AV_BUFFERSRC_FLAG_*
* @return >= 0 in case of success, a negative AVERROR code
* in case of failure
*/
av_warn_unused_result
int av_buffersrc_add_frame_flags(AVFilterContext *buffer_src,
AVFrame *frame, int flags);
/**
* Close the buffer source after EOF.
*
* This is similar to passing NULL to av_buffersrc_add_frame_flags()
* except it takes the timestamp of the EOF, i.e. the timestamp of the end
* of the last frame.
*/
int av_buffersrc_close(AVFilterContext *ctx, int64_t pts, unsigned flags);
/**
* @}
*/
#endif /* AVFILTER_BUFFERSRC_H */

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/*
* Version macros.
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVFILTER_VERSION_H
#define AVFILTER_VERSION_H
/**
* @file
* @ingroup lavfi
* Libavfilter version macros
*/
#include "libavutil/version.h"
#define LIBAVFILTER_VERSION_MAJOR 6
#define LIBAVFILTER_VERSION_MINOR 107
#define LIBAVFILTER_VERSION_MICRO 100
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
LIBAVFILTER_VERSION_MINOR, \
LIBAVFILTER_VERSION_MICRO)
#define LIBAVFILTER_VERSION AV_VERSION(LIBAVFILTER_VERSION_MAJOR, \
LIBAVFILTER_VERSION_MINOR, \
LIBAVFILTER_VERSION_MICRO)
#define LIBAVFILTER_BUILD LIBAVFILTER_VERSION_INT
#define LIBAVFILTER_IDENT "Lavfi" AV_STRINGIFY(LIBAVFILTER_VERSION)
/**
* FF_API_* defines may be placed below to indicate public API that will be
* dropped at a future version bump. The defines themselves are not part of
* the public API and may change, break or disappear at any time.
*/
#ifndef FF_API_OLD_FILTER_OPTS
#define FF_API_OLD_FILTER_OPTS (LIBAVFILTER_VERSION_MAJOR < 7)
#endif
#ifndef FF_API_OLD_FILTER_OPTS_ERROR
#define FF_API_OLD_FILTER_OPTS_ERROR (LIBAVFILTER_VERSION_MAJOR < 7)
#endif
#ifndef FF_API_AVFILTER_OPEN
#define FF_API_AVFILTER_OPEN (LIBAVFILTER_VERSION_MAJOR < 7)
#endif
#ifndef FF_API_AVFILTER_INIT_FILTER
#define FF_API_AVFILTER_INIT_FILTER (LIBAVFILTER_VERSION_MAJOR < 7)
#endif
#ifndef FF_API_OLD_FILTER_REGISTER
#define FF_API_OLD_FILTER_REGISTER (LIBAVFILTER_VERSION_MAJOR < 7)
#endif
#ifndef FF_API_NOCONST_GET_NAME
#define FF_API_NOCONST_GET_NAME (LIBAVFILTER_VERSION_MAJOR < 7)
#endif
#ifndef FF_API_LAVR_OPTS
#define FF_API_LAVR_OPTS (LIBAVFILTER_VERSION_MAJOR < 7)
#endif
#endif /* AVFILTER_VERSION_H */

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/*
* copyright (c) 2001 Fabrice Bellard
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVFORMAT_AVIO_H
#define AVFORMAT_AVIO_H
/**
* @file
* @ingroup lavf_io
* Buffered I/O operations
*/
#include <stdint.h>
#include "libavutil/common.h"
#include "libavutil/dict.h"
#include "libavutil/log.h"
#include "libavformat/version.h"
/**
* Seeking works like for a local file.
*/
#define AVIO_SEEKABLE_NORMAL (1 << 0)
/**
* Seeking by timestamp with avio_seek_time() is possible.
*/
#define AVIO_SEEKABLE_TIME (1 << 1)
/**
* Callback for checking whether to abort blocking functions.
* AVERROR_EXIT is returned in this case by the interrupted
* function. During blocking operations, callback is called with
* opaque as parameter. If the callback returns 1, the
* blocking operation will be aborted.
*
* No members can be added to this struct without a major bump, if
* new elements have been added after this struct in AVFormatContext
* or AVIOContext.
*/
typedef struct AVIOInterruptCB {
int (*callback)(void*);
void *opaque;
} AVIOInterruptCB;
/**
* Directory entry types.
*/
enum AVIODirEntryType {
AVIO_ENTRY_UNKNOWN,
AVIO_ENTRY_BLOCK_DEVICE,
AVIO_ENTRY_CHARACTER_DEVICE,
AVIO_ENTRY_DIRECTORY,
AVIO_ENTRY_NAMED_PIPE,
AVIO_ENTRY_SYMBOLIC_LINK,
AVIO_ENTRY_SOCKET,
AVIO_ENTRY_FILE,
AVIO_ENTRY_SERVER,
AVIO_ENTRY_SHARE,
AVIO_ENTRY_WORKGROUP,
};
/**
* Describes single entry of the directory.
*
* Only name and type fields are guaranteed be set.
* Rest of fields are protocol or/and platform dependent and might be unknown.
*/
typedef struct AVIODirEntry {
char *name; /**< Filename */
int type; /**< Type of the entry */
int utf8; /**< Set to 1 when name is encoded with UTF-8, 0 otherwise.
Name can be encoded with UTF-8 even though 0 is set. */
int64_t size; /**< File size in bytes, -1 if unknown. */
int64_t modification_timestamp; /**< Time of last modification in microseconds since unix
epoch, -1 if unknown. */
int64_t access_timestamp; /**< Time of last access in microseconds since unix epoch,
-1 if unknown. */
int64_t status_change_timestamp; /**< Time of last status change in microseconds since unix
epoch, -1 if unknown. */
int64_t user_id; /**< User ID of owner, -1 if unknown. */
int64_t group_id; /**< Group ID of owner, -1 if unknown. */
int64_t filemode; /**< Unix file mode, -1 if unknown. */
} AVIODirEntry;
typedef struct AVIODirContext {
struct URLContext *url_context;
} AVIODirContext;
/**
* Different data types that can be returned via the AVIO
* write_data_type callback.
*/
enum AVIODataMarkerType {
/**
* Header data; this needs to be present for the stream to be decodeable.
*/
AVIO_DATA_MARKER_HEADER,
/**
* A point in the output bytestream where a decoder can start decoding
* (i.e. a keyframe). A demuxer/decoder given the data flagged with
* AVIO_DATA_MARKER_HEADER, followed by any AVIO_DATA_MARKER_SYNC_POINT,
* should give decodeable results.
*/
AVIO_DATA_MARKER_SYNC_POINT,
/**
* A point in the output bytestream where a demuxer can start parsing
* (for non self synchronizing bytestream formats). That is, any
* non-keyframe packet start point.
*/
AVIO_DATA_MARKER_BOUNDARY_POINT,
/**
* This is any, unlabelled data. It can either be a muxer not marking
* any positions at all, it can be an actual boundary/sync point
* that the muxer chooses not to mark, or a later part of a packet/fragment
* that is cut into multiple write callbacks due to limited IO buffer size.
*/
AVIO_DATA_MARKER_UNKNOWN,
/**
* Trailer data, which doesn't contain actual content, but only for
* finalizing the output file.
*/
AVIO_DATA_MARKER_TRAILER,
/**
* A point in the output bytestream where the underlying AVIOContext might
* flush the buffer depending on latency or buffering requirements. Typically
* means the end of a packet.
*/
AVIO_DATA_MARKER_FLUSH_POINT,
};
/**
* Bytestream IO Context.
* New fields can be added to the end with minor version bumps.
* Removal, reordering and changes to existing fields require a major
* version bump.
* sizeof(AVIOContext) must not be used outside libav*.
*
* @note None of the function pointers in AVIOContext should be called
* directly, they should only be set by the client application
* when implementing custom I/O. Normally these are set to the
* function pointers specified in avio_alloc_context()
*/
typedef struct AVIOContext {
/**
* A class for private options.
*
* If this AVIOContext is created by avio_open2(), av_class is set and
* passes the options down to protocols.
*
* If this AVIOContext is manually allocated, then av_class may be set by
* the caller.
*
* warning -- this field can be NULL, be sure to not pass this AVIOContext
* to any av_opt_* functions in that case.
*/
const AVClass *av_class;
/*
* The following shows the relationship between buffer, buf_ptr,
* buf_ptr_max, buf_end, buf_size, and pos, when reading and when writing
* (since AVIOContext is used for both):
*
**********************************************************************************
* READING
**********************************************************************************
*
* | buffer_size |
* |---------------------------------------|
* | |
*
* buffer buf_ptr buf_end
* +---------------+-----------------------+
* |/ / / / / / / /|/ / / / / / /| |
* read buffer: |/ / consumed / | to be read /| |
* |/ / / / / / / /|/ / / / / / /| |
* +---------------+-----------------------+
*
* pos
* +-------------------------------------------+-----------------+
* input file: | | |
* +-------------------------------------------+-----------------+
*
*
**********************************************************************************
* WRITING
**********************************************************************************
*
* | buffer_size |
* |--------------------------------------|
* | |
*
* buf_ptr_max
* buffer (buf_ptr) buf_end
* +-----------------------+--------------+
* |/ / / / / / / / / / / /| |
* write buffer: | / / to be flushed / / | |
* |/ / / / / / / / / / / /| |
* +-----------------------+--------------+
* buf_ptr can be in this
* due to a backward seek
*
* pos
* +-------------+----------------------------------------------+
* output file: | | |
* +-------------+----------------------------------------------+
*
*/
unsigned char *buffer; /**< Start of the buffer. */
int buffer_size; /**< Maximum buffer size */
unsigned char *buf_ptr; /**< Current position in the buffer */
unsigned char *buf_end; /**< End of the data, may be less than
buffer+buffer_size if the read function returned
less data than requested, e.g. for streams where
no more data has been received yet. */
void *opaque; /**< A private pointer, passed to the read/write/seek/...
functions. */
int (*read_packet)(void *opaque, uint8_t *buf, int buf_size);
int (*write_packet)(void *opaque, uint8_t *buf, int buf_size);
int64_t (*seek)(void *opaque, int64_t offset, int whence);
int64_t pos; /**< position in the file of the current buffer */
int must_flush; /**< unused */
int eof_reached; /**< true if eof reached */
int write_flag; /**< true if open for writing */
int max_packet_size;
unsigned long checksum;
unsigned char *checksum_ptr;
unsigned long (*update_checksum)(unsigned long checksum, const uint8_t *buf, unsigned int size);
int error; /**< contains the error code or 0 if no error happened */
/**
* Pause or resume playback for network streaming protocols - e.g. MMS.
*/
int (*read_pause)(void *opaque, int pause);
/**
* Seek to a given timestamp in stream with the specified stream_index.
* Needed for some network streaming protocols which don't support seeking
* to byte position.
*/
int64_t (*read_seek)(void *opaque, int stream_index,
int64_t timestamp, int flags);
/**
* A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
*/
int seekable;
/**
* max filesize, used to limit allocations
* This field is internal to libavformat and access from outside is not allowed.
*/
int64_t maxsize;
/**
* avio_read and avio_write should if possible be satisfied directly
* instead of going through a buffer, and avio_seek will always
* call the underlying seek function directly.
*/
int direct;
/**
* Bytes read statistic
* This field is internal to libavformat and access from outside is not allowed.
*/
int64_t bytes_read;
/**
* seek statistic
* This field is internal to libavformat and access from outside is not allowed.
*/
int seek_count;
/**
* writeout statistic
* This field is internal to libavformat and access from outside is not allowed.
*/
int writeout_count;
/**
* Original buffer size
* used internally after probing and ensure seekback to reset the buffer size
* This field is internal to libavformat and access from outside is not allowed.
*/
int orig_buffer_size;
/**
* Threshold to favor readahead over seek.
* This is current internal only, do not use from outside.
*/
int short_seek_threshold;
/**
* ',' separated list of allowed protocols.
*/
const char *protocol_whitelist;
/**
* ',' separated list of disallowed protocols.
*/
const char *protocol_blacklist;
/**
* A callback that is used instead of write_packet.
*/
int (*write_data_type)(void *opaque, uint8_t *buf, int buf_size,
enum AVIODataMarkerType type, int64_t time);
/**
* If set, don't call write_data_type separately for AVIO_DATA_MARKER_BOUNDARY_POINT,
* but ignore them and treat them as AVIO_DATA_MARKER_UNKNOWN (to avoid needlessly
* small chunks of data returned from the callback).
*/
int ignore_boundary_point;
/**
* Internal, not meant to be used from outside of AVIOContext.
*/
enum AVIODataMarkerType current_type;
int64_t last_time;
/**
* A callback that is used instead of short_seek_threshold.
* This is current internal only, do not use from outside.
*/
int (*short_seek_get)(void *opaque);
int64_t written;
/**
* Maximum reached position before a backward seek in the write buffer,
* used keeping track of already written data for a later flush.
*/
unsigned char *buf_ptr_max;
/**
* Try to buffer at least this amount of data before flushing it
*/
int min_packet_size;
} AVIOContext;
/**
* Return the name of the protocol that will handle the passed URL.
*
* NULL is returned if no protocol could be found for the given URL.
*
* @return Name of the protocol or NULL.
*/
const char *avio_find_protocol_name(const char *url);
/**
* Return AVIO_FLAG_* access flags corresponding to the access permissions
* of the resource in url, or a negative value corresponding to an
* AVERROR code in case of failure. The returned access flags are
* masked by the value in flags.
*
* @note This function is intrinsically unsafe, in the sense that the
* checked resource may change its existence or permission status from
* one call to another. Thus you should not trust the returned value,
* unless you are sure that no other processes are accessing the
* checked resource.
*/
int avio_check(const char *url, int flags);
/**
* Move or rename a resource.
*
* @note url_src and url_dst should share the same protocol and authority.
*
* @param url_src url to resource to be moved
* @param url_dst new url to resource if the operation succeeded
* @return >=0 on success or negative on error.
*/
int avpriv_io_move(const char *url_src, const char *url_dst);
/**
* Delete a resource.
*
* @param url resource to be deleted.
* @return >=0 on success or negative on error.
*/
int avpriv_io_delete(const char *url);
/**
* Open directory for reading.
*
* @param s directory read context. Pointer to a NULL pointer must be passed.
* @param url directory to be listed.
* @param options A dictionary filled with protocol-private options. On return
* this parameter will be destroyed and replaced with a dictionary
* containing options that were not found. May be NULL.
* @return >=0 on success or negative on error.
*/
int avio_open_dir(AVIODirContext **s, const char *url, AVDictionary **options);
/**
* Get next directory entry.
*
* Returned entry must be freed with avio_free_directory_entry(). In particular
* it may outlive AVIODirContext.
*
* @param s directory read context.
* @param[out] next next entry or NULL when no more entries.
* @return >=0 on success or negative on error. End of list is not considered an
* error.
*/
int avio_read_dir(AVIODirContext *s, AVIODirEntry **next);
/**
* Close directory.
*
* @note Entries created using avio_read_dir() are not deleted and must be
* freeded with avio_free_directory_entry().
*
* @param s directory read context.
* @return >=0 on success or negative on error.
*/
int avio_close_dir(AVIODirContext **s);
/**
* Free entry allocated by avio_read_dir().
*
* @param entry entry to be freed.
*/
void avio_free_directory_entry(AVIODirEntry **entry);
/**
* Allocate and initialize an AVIOContext for buffered I/O. It must be later
* freed with avio_context_free().
*
* @param buffer Memory block for input/output operations via AVIOContext.
* The buffer must be allocated with av_malloc() and friends.
* It may be freed and replaced with a new buffer by libavformat.
* AVIOContext.buffer holds the buffer currently in use,
* which must be later freed with av_free().
* @param buffer_size The buffer size is very important for performance.
* For protocols with fixed blocksize it should be set to this blocksize.
* For others a typical size is a cache page, e.g. 4kb.
* @param write_flag Set to 1 if the buffer should be writable, 0 otherwise.
* @param opaque An opaque pointer to user-specific data.
* @param read_packet A function for refilling the buffer, may be NULL.
* @param write_packet A function for writing the buffer contents, may be NULL.
* The function may not change the input buffers content.
* @param seek A function for seeking to specified byte position, may be NULL.
*
* @return Allocated AVIOContext or NULL on failure.
*/
AVIOContext *avio_alloc_context(
unsigned char *buffer,
int buffer_size,
int write_flag,
void *opaque,
int (*read_packet)(void *opaque, uint8_t *buf, int buf_size),
int (*write_packet)(void *opaque, uint8_t *buf, int buf_size),
int64_t (*seek)(void *opaque, int64_t offset, int whence));
/**
* Free the supplied IO context and everything associated with it.
*
* @param s Double pointer to the IO context. This function will write NULL
* into s.
*/
void avio_context_free(AVIOContext **s);
void avio_w8(AVIOContext *s, int b);
void avio_write(AVIOContext *s, const unsigned char *buf, int size);
void avio_wl64(AVIOContext *s, uint64_t val);
void avio_wb64(AVIOContext *s, uint64_t val);
void avio_wl32(AVIOContext *s, unsigned int val);
void avio_wb32(AVIOContext *s, unsigned int val);
void avio_wl24(AVIOContext *s, unsigned int val);
void avio_wb24(AVIOContext *s, unsigned int val);
void avio_wl16(AVIOContext *s, unsigned int val);
void avio_wb16(AVIOContext *s, unsigned int val);
/**
* Write a NULL-terminated string.
* @return number of bytes written.
*/
int avio_put_str(AVIOContext *s, const char *str);
/**
* Convert an UTF-8 string to UTF-16LE and write it.
* @param s the AVIOContext
* @param str NULL-terminated UTF-8 string
*
* @return number of bytes written.
*/
int avio_put_str16le(AVIOContext *s, const char *str);
/**
* Convert an UTF-8 string to UTF-16BE and write it.
* @param s the AVIOContext
* @param str NULL-terminated UTF-8 string
*
* @return number of bytes written.
*/
int avio_put_str16be(AVIOContext *s, const char *str);
/**
* Mark the written bytestream as a specific type.
*
* Zero-length ranges are omitted from the output.
*
* @param time the stream time the current bytestream pos corresponds to
* (in AV_TIME_BASE units), or AV_NOPTS_VALUE if unknown or not
* applicable
* @param type the kind of data written starting at the current pos
*/
void avio_write_marker(AVIOContext *s, int64_t time, enum AVIODataMarkerType type);
/**
* ORing this as the "whence" parameter to a seek function causes it to
* return the filesize without seeking anywhere. Supporting this is optional.
* If it is not supported then the seek function will return <0.
*/
#define AVSEEK_SIZE 0x10000
/**
* Passing this flag as the "whence" parameter to a seek function causes it to
* seek by any means (like reopening and linear reading) or other normally unreasonable
* means that can be extremely slow.
* This may be ignored by the seek code.
*/
#define AVSEEK_FORCE 0x20000
/**
* fseek() equivalent for AVIOContext.
* @return new position or AVERROR.
*/
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence);
/**
* Skip given number of bytes forward
* @return new position or AVERROR.
*/
int64_t avio_skip(AVIOContext *s, int64_t offset);
/**
* ftell() equivalent for AVIOContext.
* @return position or AVERROR.
*/
static av_always_inline int64_t avio_tell(AVIOContext *s)
{
return avio_seek(s, 0, SEEK_CUR);
}
/**
* Get the filesize.
* @return filesize or AVERROR
*/
int64_t avio_size(AVIOContext *s);
/**
* feof() equivalent for AVIOContext.
* @return non zero if and only if end of file
*/
int avio_feof(AVIOContext *s);
#if FF_API_URL_FEOF
/**
* @deprecated use avio_feof()
*/
attribute_deprecated
int url_feof(AVIOContext *s);
#endif
/** @warning Writes up to 4 KiB per call */
int avio_printf(AVIOContext *s, const char *fmt, ...) av_printf_format(2, 3);
/**
* Force flushing of buffered data.
*
* For write streams, force the buffered data to be immediately written to the output,
* without to wait to fill the internal buffer.
*
* For read streams, discard all currently buffered data, and advance the
* reported file position to that of the underlying stream. This does not
* read new data, and does not perform any seeks.
*/
void avio_flush(AVIOContext *s);
/**
* Read size bytes from AVIOContext into buf.
* @return number of bytes read or AVERROR
*/
int avio_read(AVIOContext *s, unsigned char *buf, int size);
/**
* Read size bytes from AVIOContext into buf. Unlike avio_read(), this is allowed
* to read fewer bytes than requested. The missing bytes can be read in the next
* call. This always tries to read at least 1 byte.
* Useful to reduce latency in certain cases.
* @return number of bytes read or AVERROR
*/
int avio_read_partial(AVIOContext *s, unsigned char *buf, int size);
/**
* @name Functions for reading from AVIOContext
* @{
*
* @note return 0 if EOF, so you cannot use it if EOF handling is
* necessary
*/
int avio_r8 (AVIOContext *s);
unsigned int avio_rl16(AVIOContext *s);
unsigned int avio_rl24(AVIOContext *s);
unsigned int avio_rl32(AVIOContext *s);
uint64_t avio_rl64(AVIOContext *s);
unsigned int avio_rb16(AVIOContext *s);
unsigned int avio_rb24(AVIOContext *s);
unsigned int avio_rb32(AVIOContext *s);
uint64_t avio_rb64(AVIOContext *s);
/**
* @}
*/
/**
* Read a string from pb into buf. The reading will terminate when either
* a NULL character was encountered, maxlen bytes have been read, or nothing
* more can be read from pb. The result is guaranteed to be NULL-terminated, it
* will be truncated if buf is too small.
* Note that the string is not interpreted or validated in any way, it
* might get truncated in the middle of a sequence for multi-byte encodings.
*
* @return number of bytes read (is always <= maxlen).
* If reading ends on EOF or error, the return value will be one more than
* bytes actually read.
*/
int avio_get_str(AVIOContext *pb, int maxlen, char *buf, int buflen);
/**
* Read a UTF-16 string from pb and convert it to UTF-8.
* The reading will terminate when either a null or invalid character was
* encountered or maxlen bytes have been read.
* @return number of bytes read (is always <= maxlen)
*/
int avio_get_str16le(AVIOContext *pb, int maxlen, char *buf, int buflen);
int avio_get_str16be(AVIOContext *pb, int maxlen, char *buf, int buflen);
/**
* @name URL open modes
* The flags argument to avio_open must be one of the following
* constants, optionally ORed with other flags.
* @{
*/
#define AVIO_FLAG_READ 1 /**< read-only */
#define AVIO_FLAG_WRITE 2 /**< write-only */
#define AVIO_FLAG_READ_WRITE (AVIO_FLAG_READ|AVIO_FLAG_WRITE) /**< read-write pseudo flag */
/**
* @}
*/
/**
* Use non-blocking mode.
* If this flag is set, operations on the context will return
* AVERROR(EAGAIN) if they can not be performed immediately.
* If this flag is not set, operations on the context will never return
* AVERROR(EAGAIN).
* Note that this flag does not affect the opening/connecting of the
* context. Connecting a protocol will always block if necessary (e.g. on
* network protocols) but never hang (e.g. on busy devices).
* Warning: non-blocking protocols is work-in-progress; this flag may be
* silently ignored.
*/
#define AVIO_FLAG_NONBLOCK 8
/**
* Use direct mode.
* avio_read and avio_write should if possible be satisfied directly
* instead of going through a buffer, and avio_seek will always
* call the underlying seek function directly.
*/
#define AVIO_FLAG_DIRECT 0x8000
/**
* Create and initialize a AVIOContext for accessing the
* resource indicated by url.
* @note When the resource indicated by url has been opened in
* read+write mode, the AVIOContext can be used only for writing.
*
* @param s Used to return the pointer to the created AVIOContext.
* In case of failure the pointed to value is set to NULL.
* @param url resource to access
* @param flags flags which control how the resource indicated by url
* is to be opened
* @return >= 0 in case of success, a negative value corresponding to an
* AVERROR code in case of failure
*/
int avio_open(AVIOContext **s, const char *url, int flags);
/**
* Create and initialize a AVIOContext for accessing the
* resource indicated by url.
* @note When the resource indicated by url has been opened in
* read+write mode, the AVIOContext can be used only for writing.
*
* @param s Used to return the pointer to the created AVIOContext.
* In case of failure the pointed to value is set to NULL.
* @param url resource to access
* @param flags flags which control how the resource indicated by url
* is to be opened
* @param int_cb an interrupt callback to be used at the protocols level
* @param options A dictionary filled with protocol-private options. On return
* this parameter will be destroyed and replaced with a dict containing options
* that were not found. May be NULL.
* @return >= 0 in case of success, a negative value corresponding to an
* AVERROR code in case of failure
*/
int avio_open2(AVIOContext **s, const char *url, int flags,
const AVIOInterruptCB *int_cb, AVDictionary **options);
/**
* Close the resource accessed by the AVIOContext s and free it.
* This function can only be used if s was opened by avio_open().
*
* The internal buffer is automatically flushed before closing the
* resource.
*
* @return 0 on success, an AVERROR < 0 on error.
* @see avio_closep
*/
int avio_close(AVIOContext *s);
/**
* Close the resource accessed by the AVIOContext *s, free it
* and set the pointer pointing to it to NULL.
* This function can only be used if s was opened by avio_open().
*
* The internal buffer is automatically flushed before closing the
* resource.
*
* @return 0 on success, an AVERROR < 0 on error.
* @see avio_close
*/
int avio_closep(AVIOContext **s);
/**
* Open a write only memory stream.
*
* @param s new IO context
* @return zero if no error.
*/
int avio_open_dyn_buf(AVIOContext **s);
/**
* Return the written size and a pointer to the buffer.
* The AVIOContext stream is left intact.
* The buffer must NOT be freed.
* No padding is added to the buffer.
*
* @param s IO context
* @param pbuffer pointer to a byte buffer
* @return the length of the byte buffer
*/
int avio_get_dyn_buf(AVIOContext *s, uint8_t **pbuffer);
/**
* Return the written size and a pointer to the buffer. The buffer
* must be freed with av_free().
* Padding of AV_INPUT_BUFFER_PADDING_SIZE is added to the buffer.
*
* @param s IO context
* @param pbuffer pointer to a byte buffer
* @return the length of the byte buffer
*/
int avio_close_dyn_buf(AVIOContext *s, uint8_t **pbuffer);
/**
* Iterate through names of available protocols.
*
* @param opaque A private pointer representing current protocol.
* It must be a pointer to NULL on first iteration and will
* be updated by successive calls to avio_enum_protocols.
* @param output If set to 1, iterate over output protocols,
* otherwise over input protocols.
*
* @return A static string containing the name of current protocol or NULL
*/
const char *avio_enum_protocols(void **opaque, int output);
/**
* Pause and resume playing - only meaningful if using a network streaming
* protocol (e.g. MMS).
*
* @param h IO context from which to call the read_pause function pointer
* @param pause 1 for pause, 0 for resume
*/
int avio_pause(AVIOContext *h, int pause);
/**
* Seek to a given timestamp relative to some component stream.
* Only meaningful if using a network streaming protocol (e.g. MMS.).
*
* @param h IO context from which to call the seek function pointers
* @param stream_index The stream index that the timestamp is relative to.
* If stream_index is (-1) the timestamp should be in AV_TIME_BASE
* units from the beginning of the presentation.
* If a stream_index >= 0 is used and the protocol does not support
* seeking based on component streams, the call will fail.
* @param timestamp timestamp in AVStream.time_base units
* or if there is no stream specified then in AV_TIME_BASE units.
* @param flags Optional combination of AVSEEK_FLAG_BACKWARD, AVSEEK_FLAG_BYTE
* and AVSEEK_FLAG_ANY. The protocol may silently ignore
* AVSEEK_FLAG_BACKWARD and AVSEEK_FLAG_ANY, but AVSEEK_FLAG_BYTE will
* fail if used and not supported.
* @return >= 0 on success
* @see AVInputFormat::read_seek
*/
int64_t avio_seek_time(AVIOContext *h, int stream_index,
int64_t timestamp, int flags);
/* Avoid a warning. The header can not be included because it breaks c++. */
struct AVBPrint;
/**
* Read contents of h into print buffer, up to max_size bytes, or up to EOF.
*
* @return 0 for success (max_size bytes read or EOF reached), negative error
* code otherwise
*/
int avio_read_to_bprint(AVIOContext *h, struct AVBPrint *pb, size_t max_size);
/**
* Accept and allocate a client context on a server context.
* @param s the server context
* @param c the client context, must be unallocated
* @return >= 0 on success or a negative value corresponding
* to an AVERROR on failure
*/
int avio_accept(AVIOContext *s, AVIOContext **c);
/**
* Perform one step of the protocol handshake to accept a new client.
* This function must be called on a client returned by avio_accept() before
* using it as a read/write context.
* It is separate from avio_accept() because it may block.
* A step of the handshake is defined by places where the application may
* decide to change the proceedings.
* For example, on a protocol with a request header and a reply header, each
* one can constitute a step because the application may use the parameters
* from the request to change parameters in the reply; or each individual
* chunk of the request can constitute a step.
* If the handshake is already finished, avio_handshake() does nothing and
* returns 0 immediately.
*
* @param c the client context to perform the handshake on
* @return 0 on a complete and successful handshake
* > 0 if the handshake progressed, but is not complete
* < 0 for an AVERROR code
*/
int avio_handshake(AVIOContext *c);
#endif /* AVFORMAT_AVIO_H */

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/*
* Version macros.
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVFORMAT_VERSION_H
#define AVFORMAT_VERSION_H
/**
* @file
* @ingroup libavf
* Libavformat version macros
*/
#include "libavutil/version.h"
// Major bumping may affect Ticket5467, 5421, 5451(compatibility with Chromium)
// Also please add any ticket numbers that you believe might be affected here
#define LIBAVFORMAT_VERSION_MAJOR 57
#define LIBAVFORMAT_VERSION_MINOR 83
#define LIBAVFORMAT_VERSION_MICRO 100
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
LIBAVFORMAT_VERSION_MINOR, \
LIBAVFORMAT_VERSION_MICRO)
#define LIBAVFORMAT_VERSION AV_VERSION(LIBAVFORMAT_VERSION_MAJOR, \
LIBAVFORMAT_VERSION_MINOR, \
LIBAVFORMAT_VERSION_MICRO)
#define LIBAVFORMAT_BUILD LIBAVFORMAT_VERSION_INT
#define LIBAVFORMAT_IDENT "Lavf" AV_STRINGIFY(LIBAVFORMAT_VERSION)
/**
* FF_API_* defines may be placed below to indicate public API that will be
* dropped at a future version bump. The defines themselves are not part of
* the public API and may change, break or disappear at any time.
*
* @note, when bumping the major version it is recommended to manually
* disable each FF_API_* in its own commit instead of disabling them all
* at once through the bump. This improves the git bisect-ability of the change.
*
*/
#ifndef FF_API_LAVF_BITEXACT
#define FF_API_LAVF_BITEXACT (LIBAVFORMAT_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_LAVF_FRAC
#define FF_API_LAVF_FRAC (LIBAVFORMAT_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_LAVF_CODEC_TB
#define FF_API_LAVF_CODEC_TB (LIBAVFORMAT_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_URL_FEOF
#define FF_API_URL_FEOF (LIBAVFORMAT_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_LAVF_FMT_RAWPICTURE
#define FF_API_LAVF_FMT_RAWPICTURE (LIBAVFORMAT_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_COMPUTE_PKT_FIELDS2
#define FF_API_COMPUTE_PKT_FIELDS2 (LIBAVFORMAT_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_OLD_OPEN_CALLBACKS
#define FF_API_OLD_OPEN_CALLBACKS (LIBAVFORMAT_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_LAVF_AVCTX
#define FF_API_LAVF_AVCTX (LIBAVFORMAT_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_NOCONST_GET_SIDE_DATA
#define FF_API_NOCONST_GET_SIDE_DATA (LIBAVFORMAT_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_HTTP_USER_AGENT
#define FF_API_HTTP_USER_AGENT (LIBAVFORMAT_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_HLS_WRAP
#define FF_API_HLS_WRAP (LIBAVFORMAT_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_LAVF_MERGE_SD
#define FF_API_LAVF_MERGE_SD (LIBAVFORMAT_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_LAVF_KEEPSIDE_FLAG
#define FF_API_LAVF_KEEPSIDE_FLAG (LIBAVFORMAT_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_OLD_ROTATE_API
#define FF_API_OLD_ROTATE_API (LIBAVFORMAT_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_R_FRAME_RATE
#define FF_API_R_FRAME_RATE 1
#endif
#endif /* AVFORMAT_VERSION_H */

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/*
* copyright (c) 2006 Mans Rullgard
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* @ingroup lavu_adler32
* Public header for Adler-32 hash function implementation.
*/
#ifndef AVUTIL_ADLER32_H
#define AVUTIL_ADLER32_H
#include <stdint.h>
#include "attributes.h"
/**
* @defgroup lavu_adler32 Adler-32
* @ingroup lavu_hash
* Adler-32 hash function implementation.
*
* @{
*/
/**
* Calculate the Adler32 checksum of a buffer.
*
* Passing the return value to a subsequent av_adler32_update() call
* allows the checksum of multiple buffers to be calculated as though
* they were concatenated.
*
* @param adler initial checksum value
* @param buf pointer to input buffer
* @param len size of input buffer
* @return updated checksum
*/
unsigned long av_adler32_update(unsigned long adler, const uint8_t *buf,
unsigned int len) av_pure;
/**
* @}
*/
#endif /* AVUTIL_ADLER32_H */

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/*
* copyright (c) 2007 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_AES_H
#define AVUTIL_AES_H
#include <stdint.h>
#include "attributes.h"
#include "version.h"
/**
* @defgroup lavu_aes AES
* @ingroup lavu_crypto
* @{
*/
extern const int av_aes_size;
struct AVAES;
/**
* Allocate an AVAES context.
*/
struct AVAES *av_aes_alloc(void);
/**
* Initialize an AVAES context.
* @param key_bits 128, 192 or 256
* @param decrypt 0 for encryption, 1 for decryption
*/
int av_aes_init(struct AVAES *a, const uint8_t *key, int key_bits, int decrypt);
/**
* Encrypt or decrypt a buffer using a previously initialized context.
* @param count number of 16 byte blocks
* @param dst destination array, can be equal to src
* @param src source array, can be equal to dst
* @param iv initialization vector for CBC mode, if NULL then ECB will be used
* @param decrypt 0 for encryption, 1 for decryption
*/
void av_aes_crypt(struct AVAES *a, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt);
/**
* @}
*/
#endif /* AVUTIL_AES_H */

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/*
* AES-CTR cipher
* Copyright (c) 2015 Eran Kornblau <erankor at gmail dot com>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_AES_CTR_H
#define AVUTIL_AES_CTR_H
#include <stdint.h>
#include "attributes.h"
#include "version.h"
#define AES_CTR_KEY_SIZE (16)
#define AES_CTR_IV_SIZE (8)
struct AVAESCTR;
/**
* Allocate an AVAESCTR context.
*/
struct AVAESCTR *av_aes_ctr_alloc(void);
/**
* Initialize an AVAESCTR context.
* @param key encryption key, must have a length of AES_CTR_KEY_SIZE
*/
int av_aes_ctr_init(struct AVAESCTR *a, const uint8_t *key);
/**
* Release an AVAESCTR context.
*/
void av_aes_ctr_free(struct AVAESCTR *a);
/**
* Process a buffer using a previously initialized context.
* @param dst destination array, can be equal to src
* @param src source array, can be equal to dst
* @param size the size of src and dst
*/
void av_aes_ctr_crypt(struct AVAESCTR *a, uint8_t *dst, const uint8_t *src, int size);
/**
* Get the current iv
*/
const uint8_t* av_aes_ctr_get_iv(struct AVAESCTR *a);
/**
* Generate a random iv
*/
void av_aes_ctr_set_random_iv(struct AVAESCTR *a);
/**
* Forcefully change the iv
*/
void av_aes_ctr_set_iv(struct AVAESCTR *a, const uint8_t* iv);
/**
* Increment the top 64 bit of the iv (performed after each frame)
*/
void av_aes_ctr_increment_iv(struct AVAESCTR *a);
/**
* @}
*/
#endif /* AVUTIL_AES_CTR_H */

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/*
* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* Macro definitions for various function/variable attributes
*/
#ifndef AVUTIL_ATTRIBUTES_H
#define AVUTIL_ATTRIBUTES_H
#ifdef __GNUC__
# define AV_GCC_VERSION_AT_LEAST(x,y) (__GNUC__ > (x) || __GNUC__ == (x) && __GNUC_MINOR__ >= (y))
# define AV_GCC_VERSION_AT_MOST(x,y) (__GNUC__ < (x) || __GNUC__ == (x) && __GNUC_MINOR__ <= (y))
#else
# define AV_GCC_VERSION_AT_LEAST(x,y) 0
# define AV_GCC_VERSION_AT_MOST(x,y) 0
#endif
#ifndef av_always_inline
#if AV_GCC_VERSION_AT_LEAST(3,1)
# define av_always_inline __attribute__((always_inline)) inline
#elif defined(_MSC_VER)
# define av_always_inline __forceinline
#else
# define av_always_inline inline
#endif
#endif
#ifndef av_extern_inline
#if defined(__ICL) && __ICL >= 1210 || defined(__GNUC_STDC_INLINE__)
# define av_extern_inline extern inline
#else
# define av_extern_inline inline
#endif
#endif
#if AV_GCC_VERSION_AT_LEAST(3,4)
# define av_warn_unused_result __attribute__((warn_unused_result))
#else
# define av_warn_unused_result
#endif
#if AV_GCC_VERSION_AT_LEAST(3,1)
# define av_noinline __attribute__((noinline))
#elif defined(_MSC_VER)
# define av_noinline __declspec(noinline)
#else
# define av_noinline
#endif
#if AV_GCC_VERSION_AT_LEAST(3,1)
# define av_pure __attribute__((pure))
#else
# define av_pure
#endif
#if AV_GCC_VERSION_AT_LEAST(2,6)
# define av_const __attribute__((const))
#else
# define av_const
#endif
#if AV_GCC_VERSION_AT_LEAST(4,3)
# define av_cold __attribute__((cold))
#else
# define av_cold
#endif
#if AV_GCC_VERSION_AT_LEAST(4,1) && !defined(__llvm__)
# define av_flatten __attribute__((flatten))
#else
# define av_flatten
#endif
#if AV_GCC_VERSION_AT_LEAST(3,1)
# define attribute_deprecated __attribute__((deprecated))
#elif defined(_MSC_VER)
# define attribute_deprecated __declspec(deprecated)
#else
# define attribute_deprecated
#endif
/**
* Disable warnings about deprecated features
* This is useful for sections of code kept for backward compatibility and
* scheduled for removal.
*/
#ifndef AV_NOWARN_DEPRECATED
#if AV_GCC_VERSION_AT_LEAST(4,6)
# define AV_NOWARN_DEPRECATED(code) \
_Pragma("GCC diagnostic push") \
_Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") \
code \
_Pragma("GCC diagnostic pop")
#elif defined(_MSC_VER)
# define AV_NOWARN_DEPRECATED(code) \
__pragma(warning(push)) \
__pragma(warning(disable : 4996)) \
code; \
__pragma(warning(pop))
#else
# define AV_NOWARN_DEPRECATED(code) code
#endif
#endif
#if defined(__GNUC__) || defined(__clang__)
# define av_unused __attribute__((unused))
#else
# define av_unused
#endif
/**
* Mark a variable as used and prevent the compiler from optimizing it
* away. This is useful for variables accessed only from inline
* assembler without the compiler being aware.
*/
#if AV_GCC_VERSION_AT_LEAST(3,1) || defined(__clang__)
# define av_used __attribute__((used))
#else
# define av_used
#endif
#if AV_GCC_VERSION_AT_LEAST(3,3)
# define av_alias __attribute__((may_alias))
#else
# define av_alias
#endif
#if defined(__GNUC__) && !defined(__INTEL_COMPILER) && !defined(__clang__)
# define av_uninit(x) x=x
#else
# define av_uninit(x) x
#endif
#ifdef __GNUC__
# define av_builtin_constant_p __builtin_constant_p
# define av_printf_format(fmtpos, attrpos) __attribute__((__format__(__printf__, fmtpos, attrpos)))
#else
# define av_builtin_constant_p(x) 0
# define av_printf_format(fmtpos, attrpos)
#endif
#if AV_GCC_VERSION_AT_LEAST(2,5)
# define av_noreturn __attribute__((noreturn))
#else
# define av_noreturn
#endif
#endif /* AVUTIL_ATTRIBUTES_H */

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/*
* Audio FIFO
* Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* Audio FIFO Buffer
*/
#ifndef AVUTIL_AUDIO_FIFO_H
#define AVUTIL_AUDIO_FIFO_H
#include "avutil.h"
#include "fifo.h"
#include "samplefmt.h"
/**
* @addtogroup lavu_audio
* @{
*
* @defgroup lavu_audiofifo Audio FIFO Buffer
* @{
*/
/**
* Context for an Audio FIFO Buffer.
*
* - Operates at the sample level rather than the byte level.
* - Supports multiple channels with either planar or packed sample format.
* - Automatic reallocation when writing to a full buffer.
*/
typedef struct AVAudioFifo AVAudioFifo;
/**
* Free an AVAudioFifo.
*
* @param af AVAudioFifo to free
*/
void av_audio_fifo_free(AVAudioFifo *af);
/**
* Allocate an AVAudioFifo.
*
* @param sample_fmt sample format
* @param channels number of channels
* @param nb_samples initial allocation size, in samples
* @return newly allocated AVAudioFifo, or NULL on error
*/
AVAudioFifo *av_audio_fifo_alloc(enum AVSampleFormat sample_fmt, int channels,
int nb_samples);
/**
* Reallocate an AVAudioFifo.
*
* @param af AVAudioFifo to reallocate
* @param nb_samples new allocation size, in samples
* @return 0 if OK, or negative AVERROR code on failure
*/
av_warn_unused_result
int av_audio_fifo_realloc(AVAudioFifo *af, int nb_samples);
/**
* Write data to an AVAudioFifo.
*
* The AVAudioFifo will be reallocated automatically if the available space
* is less than nb_samples.
*
* @see enum AVSampleFormat
* The documentation for AVSampleFormat describes the data layout.
*
* @param af AVAudioFifo to write to
* @param data audio data plane pointers
* @param nb_samples number of samples to write
* @return number of samples actually written, or negative AVERROR
* code on failure. If successful, the number of samples
* actually written will always be nb_samples.
*/
int av_audio_fifo_write(AVAudioFifo *af, void **data, int nb_samples);
/**
* Peek data from an AVAudioFifo.
*
* @see enum AVSampleFormat
* The documentation for AVSampleFormat describes the data layout.
*
* @param af AVAudioFifo to read from
* @param data audio data plane pointers
* @param nb_samples number of samples to peek
* @return number of samples actually peek, or negative AVERROR code
* on failure. The number of samples actually peek will not
* be greater than nb_samples, and will only be less than
* nb_samples if av_audio_fifo_size is less than nb_samples.
*/
int av_audio_fifo_peek(AVAudioFifo *af, void **data, int nb_samples);
/**
* Peek data from an AVAudioFifo.
*
* @see enum AVSampleFormat
* The documentation for AVSampleFormat describes the data layout.
*
* @param af AVAudioFifo to read from
* @param data audio data plane pointers
* @param nb_samples number of samples to peek
* @param offset offset from current read position
* @return number of samples actually peek, or negative AVERROR code
* on failure. The number of samples actually peek will not
* be greater than nb_samples, and will only be less than
* nb_samples if av_audio_fifo_size is less than nb_samples.
*/
int av_audio_fifo_peek_at(AVAudioFifo *af, void **data, int nb_samples, int offset);
/**
* Read data from an AVAudioFifo.
*
* @see enum AVSampleFormat
* The documentation for AVSampleFormat describes the data layout.
*
* @param af AVAudioFifo to read from
* @param data audio data plane pointers
* @param nb_samples number of samples to read
* @return number of samples actually read, or negative AVERROR code
* on failure. The number of samples actually read will not
* be greater than nb_samples, and will only be less than
* nb_samples if av_audio_fifo_size is less than nb_samples.
*/
int av_audio_fifo_read(AVAudioFifo *af, void **data, int nb_samples);
/**
* Drain data from an AVAudioFifo.
*
* Removes the data without reading it.
*
* @param af AVAudioFifo to drain
* @param nb_samples number of samples to drain
* @return 0 if OK, or negative AVERROR code on failure
*/
int av_audio_fifo_drain(AVAudioFifo *af, int nb_samples);
/**
* Reset the AVAudioFifo buffer.
*
* This empties all data in the buffer.
*
* @param af AVAudioFifo to reset
*/
void av_audio_fifo_reset(AVAudioFifo *af);
/**
* Get the current number of samples in the AVAudioFifo available for reading.
*
* @param af the AVAudioFifo to query
* @return number of samples available for reading
*/
int av_audio_fifo_size(AVAudioFifo *af);
/**
* Get the current number of samples in the AVAudioFifo available for writing.
*
* @param af the AVAudioFifo to query
* @return number of samples available for writing
*/
int av_audio_fifo_space(AVAudioFifo *af);
/**
* @}
* @}
*/
#endif /* AVUTIL_AUDIO_FIFO_H */

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/*
* copyright (c) 2010 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* simple assert() macros that are a bit more flexible than ISO C assert().
* @author Michael Niedermayer <michaelni@gmx.at>
*/
#ifndef AVUTIL_AVASSERT_H
#define AVUTIL_AVASSERT_H
#include <stdlib.h>
#include "avutil.h"
#include "log.h"
/**
* assert() equivalent, that is always enabled.
*/
#define av_assert0(cond) do { \
if (!(cond)) { \
av_log(NULL, AV_LOG_PANIC, "Assertion %s failed at %s:%d\n", \
AV_STRINGIFY(cond), __FILE__, __LINE__); \
abort(); \
} \
} while (0)
/**
* assert() equivalent, that does not lie in speed critical code.
* These asserts() thus can be enabled without fearing speed loss.
*/
#if defined(ASSERT_LEVEL) && ASSERT_LEVEL > 0
#define av_assert1(cond) av_assert0(cond)
#else
#define av_assert1(cond) ((void)0)
#endif
/**
* assert() equivalent, that does lie in speed critical code.
*/
#if defined(ASSERT_LEVEL) && ASSERT_LEVEL > 1
#define av_assert2(cond) av_assert0(cond)
#define av_assert2_fpu() av_assert0_fpu()
#else
#define av_assert2(cond) ((void)0)
#define av_assert2_fpu() ((void)0)
#endif
/**
* Assert that floating point opperations can be executed.
*
* This will av_assert0() that the cpu is not in MMX state on X86
*/
void av_assert0_fpu(void);
#endif /* AVUTIL_AVASSERT_H */

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/* Generated by ffconf */
#ifndef AVUTIL_AVCONFIG_H
#define AVUTIL_AVCONFIG_H
#define AV_HAVE_BIGENDIAN 0
#define AV_HAVE_FAST_UNALIGNED 1
#endif /* AVUTIL_AVCONFIG_H */

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/*
* Copyright (c) 2007 Mans Rullgard
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_AVSTRING_H
#define AVUTIL_AVSTRING_H
#include <stddef.h>
#include <stdint.h>
#include "attributes.h"
/**
* @addtogroup lavu_string
* @{
*/
/**
* Return non-zero if pfx is a prefix of str. If it is, *ptr is set to
* the address of the first character in str after the prefix.
*
* @param str input string
* @param pfx prefix to test
* @param ptr updated if the prefix is matched inside str
* @return non-zero if the prefix matches, zero otherwise
*/
int av_strstart(const char *str, const char *pfx, const char **ptr);
/**
* Return non-zero if pfx is a prefix of str independent of case. If
* it is, *ptr is set to the address of the first character in str
* after the prefix.
*
* @param str input string
* @param pfx prefix to test
* @param ptr updated if the prefix is matched inside str
* @return non-zero if the prefix matches, zero otherwise
*/
int av_stristart(const char *str, const char *pfx, const char **ptr);
/**
* Locate the first case-independent occurrence in the string haystack
* of the string needle. A zero-length string needle is considered to
* match at the start of haystack.
*
* This function is a case-insensitive version of the standard strstr().
*
* @param haystack string to search in
* @param needle string to search for
* @return pointer to the located match within haystack
* or a null pointer if no match
*/
char *av_stristr(const char *haystack, const char *needle);
/**
* Locate the first occurrence of the string needle in the string haystack
* where not more than hay_length characters are searched. A zero-length
* string needle is considered to match at the start of haystack.
*
* This function is a length-limited version of the standard strstr().
*
* @param haystack string to search in
* @param needle string to search for
* @param hay_length length of string to search in
* @return pointer to the located match within haystack
* or a null pointer if no match
*/
char *av_strnstr(const char *haystack, const char *needle, size_t hay_length);
/**
* Copy the string src to dst, but no more than size - 1 bytes, and
* null-terminate dst.
*
* This function is the same as BSD strlcpy().
*
* @param dst destination buffer
* @param src source string
* @param size size of destination buffer
* @return the length of src
*
* @warning since the return value is the length of src, src absolutely
* _must_ be a properly 0-terminated string, otherwise this will read beyond
* the end of the buffer and possibly crash.
*/
size_t av_strlcpy(char *dst, const char *src, size_t size);
/**
* Append the string src to the string dst, but to a total length of
* no more than size - 1 bytes, and null-terminate dst.
*
* This function is similar to BSD strlcat(), but differs when
* size <= strlen(dst).
*
* @param dst destination buffer
* @param src source string
* @param size size of destination buffer
* @return the total length of src and dst
*
* @warning since the return value use the length of src and dst, these
* absolutely _must_ be a properly 0-terminated strings, otherwise this
* will read beyond the end of the buffer and possibly crash.
*/
size_t av_strlcat(char *dst, const char *src, size_t size);
/**
* Append output to a string, according to a format. Never write out of
* the destination buffer, and always put a terminating 0 within
* the buffer.
* @param dst destination buffer (string to which the output is
* appended)
* @param size total size of the destination buffer
* @param fmt printf-compatible format string, specifying how the
* following parameters are used
* @return the length of the string that would have been generated
* if enough space had been available
*/
size_t av_strlcatf(char *dst, size_t size, const char *fmt, ...) av_printf_format(3, 4);
/**
* Get the count of continuous non zero chars starting from the beginning.
*
* @param len maximum number of characters to check in the string, that
* is the maximum value which is returned by the function
*/
static inline size_t av_strnlen(const char *s, size_t len)
{
size_t i;
for (i = 0; i < len && s[i]; i++)
;
return i;
}
/**
* Print arguments following specified format into a large enough auto
* allocated buffer. It is similar to GNU asprintf().
* @param fmt printf-compatible format string, specifying how the
* following parameters are used.
* @return the allocated string
* @note You have to free the string yourself with av_free().
*/
char *av_asprintf(const char *fmt, ...) av_printf_format(1, 2);
/**
* Convert a number to an av_malloced string.
*/
char *av_d2str(double d);
/**
* Unescape the given string until a non escaped terminating char,
* and return the token corresponding to the unescaped string.
*
* The normal \ and ' escaping is supported. Leading and trailing
* whitespaces are removed, unless they are escaped with '\' or are
* enclosed between ''.
*
* @param buf the buffer to parse, buf will be updated to point to the
* terminating char
* @param term a 0-terminated list of terminating chars
* @return the malloced unescaped string, which must be av_freed by
* the user, NULL in case of allocation failure
*/
char *av_get_token(const char **buf, const char *term);
/**
* Split the string into several tokens which can be accessed by
* successive calls to av_strtok().
*
* A token is defined as a sequence of characters not belonging to the
* set specified in delim.
*
* On the first call to av_strtok(), s should point to the string to
* parse, and the value of saveptr is ignored. In subsequent calls, s
* should be NULL, and saveptr should be unchanged since the previous
* call.
*
* This function is similar to strtok_r() defined in POSIX.1.
*
* @param s the string to parse, may be NULL
* @param delim 0-terminated list of token delimiters, must be non-NULL
* @param saveptr user-provided pointer which points to stored
* information necessary for av_strtok() to continue scanning the same
* string. saveptr is updated to point to the next character after the
* first delimiter found, or to NULL if the string was terminated
* @return the found token, or NULL when no token is found
*/
char *av_strtok(char *s, const char *delim, char **saveptr);
/**
* Locale-independent conversion of ASCII isdigit.
*/
static inline av_const int av_isdigit(int c)
{
return c >= '0' && c <= '9';
}
/**
* Locale-independent conversion of ASCII isgraph.
*/
static inline av_const int av_isgraph(int c)
{
return c > 32 && c < 127;
}
/**
* Locale-independent conversion of ASCII isspace.
*/
static inline av_const int av_isspace(int c)
{
return c == ' ' || c == '\f' || c == '\n' || c == '\r' || c == '\t' ||
c == '\v';
}
/**
* Locale-independent conversion of ASCII characters to uppercase.
*/
static inline av_const int av_toupper(int c)
{
if (c >= 'a' && c <= 'z')
c ^= 0x20;
return c;
}
/**
* Locale-independent conversion of ASCII characters to lowercase.
*/
static inline av_const int av_tolower(int c)
{
if (c >= 'A' && c <= 'Z')
c ^= 0x20;
return c;
}
/**
* Locale-independent conversion of ASCII isxdigit.
*/
static inline av_const int av_isxdigit(int c)
{
c = av_tolower(c);
return av_isdigit(c) || (c >= 'a' && c <= 'f');
}
/**
* Locale-independent case-insensitive compare.
* @note This means only ASCII-range characters are case-insensitive
*/
int av_strcasecmp(const char *a, const char *b);
/**
* Locale-independent case-insensitive compare.
* @note This means only ASCII-range characters are case-insensitive
*/
int av_strncasecmp(const char *a, const char *b, size_t n);
/**
* Locale-independent strings replace.
* @note This means only ASCII-range characters are replace
*/
char *av_strireplace(const char *str, const char *from, const char *to);
/**
* Thread safe basename.
* @param path the path, on DOS both \ and / are considered separators.
* @return pointer to the basename substring.
*/
const char *av_basename(const char *path);
/**
* Thread safe dirname.
* @param path the path, on DOS both \ and / are considered separators.
* @return the path with the separator replaced by the string terminator or ".".
* @note the function may change the input string.
*/
const char *av_dirname(char *path);
/**
* Match instances of a name in a comma-separated list of names.
* List entries are checked from the start to the end of the names list,
* the first match ends further processing. If an entry prefixed with '-'
* matches, then 0 is returned. The "ALL" list entry is considered to
* match all names.
*
* @param name Name to look for.
* @param names List of names.
* @return 1 on match, 0 otherwise.
*/
int av_match_name(const char *name, const char *names);
/**
* Append path component to the existing path.
* Path separator '/' is placed between when needed.
* Resulting string have to be freed with av_free().
* @param path base path
* @param component component to be appended
* @return new path or NULL on error.
*/
char *av_append_path_component(const char *path, const char *component);
enum AVEscapeMode {
AV_ESCAPE_MODE_AUTO, ///< Use auto-selected escaping mode.
AV_ESCAPE_MODE_BACKSLASH, ///< Use backslash escaping.
AV_ESCAPE_MODE_QUOTE, ///< Use single-quote escaping.
};
/**
* Consider spaces special and escape them even in the middle of the
* string.
*
* This is equivalent to adding the whitespace characters to the special
* characters lists, except it is guaranteed to use the exact same list
* of whitespace characters as the rest of libavutil.
*/
#define AV_ESCAPE_FLAG_WHITESPACE (1 << 0)
/**
* Escape only specified special characters.
* Without this flag, escape also any characters that may be considered
* special by av_get_token(), such as the single quote.
*/
#define AV_ESCAPE_FLAG_STRICT (1 << 1)
/**
* Escape string in src, and put the escaped string in an allocated
* string in *dst, which must be freed with av_free().
*
* @param dst pointer where an allocated string is put
* @param src string to escape, must be non-NULL
* @param special_chars string containing the special characters which
* need to be escaped, can be NULL
* @param mode escape mode to employ, see AV_ESCAPE_MODE_* macros.
* Any unknown value for mode will be considered equivalent to
* AV_ESCAPE_MODE_BACKSLASH, but this behaviour can change without
* notice.
* @param flags flags which control how to escape, see AV_ESCAPE_FLAG_ macros
* @return the length of the allocated string, or a negative error code in case of error
* @see av_bprint_escape()
*/
av_warn_unused_result
int av_escape(char **dst, const char *src, const char *special_chars,
enum AVEscapeMode mode, int flags);
#define AV_UTF8_FLAG_ACCEPT_INVALID_BIG_CODES 1 ///< accept codepoints over 0x10FFFF
#define AV_UTF8_FLAG_ACCEPT_NON_CHARACTERS 2 ///< accept non-characters - 0xFFFE and 0xFFFF
#define AV_UTF8_FLAG_ACCEPT_SURROGATES 4 ///< accept UTF-16 surrogates codes
#define AV_UTF8_FLAG_EXCLUDE_XML_INVALID_CONTROL_CODES 8 ///< exclude control codes not accepted by XML
#define AV_UTF8_FLAG_ACCEPT_ALL \
AV_UTF8_FLAG_ACCEPT_INVALID_BIG_CODES|AV_UTF8_FLAG_ACCEPT_NON_CHARACTERS|AV_UTF8_FLAG_ACCEPT_SURROGATES
/**
* Read and decode a single UTF-8 code point (character) from the
* buffer in *buf, and update *buf to point to the next byte to
* decode.
*
* In case of an invalid byte sequence, the pointer will be updated to
* the next byte after the invalid sequence and the function will
* return an error code.
*
* Depending on the specified flags, the function will also fail in
* case the decoded code point does not belong to a valid range.
*
* @note For speed-relevant code a carefully implemented use of
* GET_UTF8() may be preferred.
*
* @param codep pointer used to return the parsed code in case of success.
* The value in *codep is set even in case the range check fails.
* @param bufp pointer to the address the first byte of the sequence
* to decode, updated by the function to point to the
* byte next after the decoded sequence
* @param buf_end pointer to the end of the buffer, points to the next
* byte past the last in the buffer. This is used to
* avoid buffer overreads (in case of an unfinished
* UTF-8 sequence towards the end of the buffer).
* @param flags a collection of AV_UTF8_FLAG_* flags
* @return >= 0 in case a sequence was successfully read, a negative
* value in case of invalid sequence
*/
av_warn_unused_result
int av_utf8_decode(int32_t *codep, const uint8_t **bufp, const uint8_t *buf_end,
unsigned int flags);
/**
* Check if a name is in a list.
* @returns 0 if not found, or the 1 based index where it has been found in the
* list.
*/
int av_match_list(const char *name, const char *list, char separator);
/**
* @}
*/
#endif /* AVUTIL_AVSTRING_H */

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/*
* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_AVUTIL_H
#define AVUTIL_AVUTIL_H
/**
* @file
* @ingroup lavu
* Convenience header that includes @ref lavu "libavutil"'s core.
*/
/**
* @mainpage
*
* @section ffmpeg_intro Introduction
*
* This document describes the usage of the different libraries
* provided by FFmpeg.
*
* @li @ref libavc "libavcodec" encoding/decoding library
* @li @ref lavfi "libavfilter" graph-based frame editing library
* @li @ref libavf "libavformat" I/O and muxing/demuxing library
* @li @ref lavd "libavdevice" special devices muxing/demuxing library
* @li @ref lavu "libavutil" common utility library
* @li @ref lswr "libswresample" audio resampling, format conversion and mixing
* @li @ref lpp "libpostproc" post processing library
* @li @ref libsws "libswscale" color conversion and scaling library
*
* @section ffmpeg_versioning Versioning and compatibility
*
* Each of the FFmpeg libraries contains a version.h header, which defines a
* major, minor and micro version number with the
* <em>LIBRARYNAME_VERSION_{MAJOR,MINOR,MICRO}</em> macros. The major version
* number is incremented with backward incompatible changes - e.g. removing
* parts of the public API, reordering public struct members, etc. The minor
* version number is incremented for backward compatible API changes or major
* new features - e.g. adding a new public function or a new decoder. The micro
* version number is incremented for smaller changes that a calling program
* might still want to check for - e.g. changing behavior in a previously
* unspecified situation.
*
* FFmpeg guarantees backward API and ABI compatibility for each library as long
* as its major version number is unchanged. This means that no public symbols
* will be removed or renamed. Types and names of the public struct members and
* values of public macros and enums will remain the same (unless they were
* explicitly declared as not part of the public API). Documented behavior will
* not change.
*
* In other words, any correct program that works with a given FFmpeg snapshot
* should work just as well without any changes with any later snapshot with the
* same major versions. This applies to both rebuilding the program against new
* FFmpeg versions or to replacing the dynamic FFmpeg libraries that a program
* links against.
*
* However, new public symbols may be added and new members may be appended to
* public structs whose size is not part of public ABI (most public structs in
* FFmpeg). New macros and enum values may be added. Behavior in undocumented
* situations may change slightly (and be documented). All those are accompanied
* by an entry in doc/APIchanges and incrementing either the minor or micro
* version number.
*/
/**
* @defgroup lavu libavutil
* Common code shared across all FFmpeg libraries.
*
* @note
* libavutil is designed to be modular. In most cases, in order to use the
* functions provided by one component of libavutil you must explicitly include
* the specific header containing that feature. If you are only using
* media-related components, you could simply include libavutil/avutil.h, which
* brings in most of the "core" components.
*
* @{
*
* @defgroup lavu_crypto Crypto and Hashing
*
* @{
* @}
*
* @defgroup lavu_math Mathematics
* @{
*
* @}
*
* @defgroup lavu_string String Manipulation
*
* @{
*
* @}
*
* @defgroup lavu_mem Memory Management
*
* @{
*
* @}
*
* @defgroup lavu_data Data Structures
* @{
*
* @}
*
* @defgroup lavu_video Video related
*
* @{
*
* @}
*
* @defgroup lavu_audio Audio related
*
* @{
*
* @}
*
* @defgroup lavu_error Error Codes
*
* @{
*
* @}
*
* @defgroup lavu_log Logging Facility
*
* @{
*
* @}
*
* @defgroup lavu_misc Other
*
* @{
*
* @defgroup preproc_misc Preprocessor String Macros
*
* @{
*
* @}
*
* @defgroup version_utils Library Version Macros
*
* @{
*
* @}
*/
/**
* @addtogroup lavu_ver
* @{
*/
/**
* Return the LIBAVUTIL_VERSION_INT constant.
*/
unsigned avutil_version(void);
/**
* Return an informative version string. This usually is the actual release
* version number or a git commit description. This string has no fixed format
* and can change any time. It should never be parsed by code.
*/
const char *av_version_info(void);
/**
* Return the libavutil build-time configuration.
*/
const char *avutil_configuration(void);
/**
* Return the libavutil license.
*/
const char *avutil_license(void);
/**
* @}
*/
/**
* @addtogroup lavu_media Media Type
* @brief Media Type
*/
enum AVMediaType {
AVMEDIA_TYPE_UNKNOWN = -1, ///< Usually treated as AVMEDIA_TYPE_DATA
AVMEDIA_TYPE_VIDEO,
AVMEDIA_TYPE_AUDIO,
AVMEDIA_TYPE_DATA, ///< Opaque data information usually continuous
AVMEDIA_TYPE_SUBTITLE,
AVMEDIA_TYPE_ATTACHMENT, ///< Opaque data information usually sparse
AVMEDIA_TYPE_NB
};
/**
* Return a string describing the media_type enum, NULL if media_type
* is unknown.
*/
const char *av_get_media_type_string(enum AVMediaType media_type);
/**
* @defgroup lavu_const Constants
* @{
*
* @defgroup lavu_enc Encoding specific
*
* @note those definition should move to avcodec
* @{
*/
#define FF_LAMBDA_SHIFT 7
#define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
#define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
#define FF_LAMBDA_MAX (256*128-1)
#define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
/**
* @}
* @defgroup lavu_time Timestamp specific
*
* FFmpeg internal timebase and timestamp definitions
*
* @{
*/
/**
* @brief Undefined timestamp value
*
* Usually reported by demuxer that work on containers that do not provide
* either pts or dts.
*/
#define AV_NOPTS_VALUE ((int64_t)UINT64_C(0x8000000000000000))
/**
* Internal time base represented as integer
*/
#define AV_TIME_BASE 1000000
/**
* Internal time base represented as fractional value
*/
#define AV_TIME_BASE_Q (AVRational){1, AV_TIME_BASE}
/**
* @}
* @}
* @defgroup lavu_picture Image related
*
* AVPicture types, pixel formats and basic image planes manipulation.
*
* @{
*/
enum AVPictureType {
AV_PICTURE_TYPE_NONE = 0, ///< Undefined
AV_PICTURE_TYPE_I, ///< Intra
AV_PICTURE_TYPE_P, ///< Predicted
AV_PICTURE_TYPE_B, ///< Bi-dir predicted
AV_PICTURE_TYPE_S, ///< S(GMC)-VOP MPEG-4
AV_PICTURE_TYPE_SI, ///< Switching Intra
AV_PICTURE_TYPE_SP, ///< Switching Predicted
AV_PICTURE_TYPE_BI, ///< BI type
};
/**
* Return a single letter to describe the given picture type
* pict_type.
*
* @param[in] pict_type the picture type @return a single character
* representing the picture type, '?' if pict_type is unknown
*/
char av_get_picture_type_char(enum AVPictureType pict_type);
/**
* @}
*/
#include "common.h"
#include "error.h"
#include "rational.h"
#include "version.h"
#include "macros.h"
#include "mathematics.h"
#include "log.h"
#include "pixfmt.h"
/**
* Return x default pointer in case p is NULL.
*/
static inline void *av_x_if_null(const void *p, const void *x)
{
return (void *)(intptr_t)(p ? p : x);
}
/**
* Compute the length of an integer list.
*
* @param elsize size in bytes of each list element (only 1, 2, 4 or 8)
* @param term list terminator (usually 0 or -1)
* @param list pointer to the list
* @return length of the list, in elements, not counting the terminator
*/
unsigned av_int_list_length_for_size(unsigned elsize,
const void *list, uint64_t term) av_pure;
/**
* Compute the length of an integer list.
*
* @param term list terminator (usually 0 or -1)
* @param list pointer to the list
* @return length of the list, in elements, not counting the terminator
*/
#define av_int_list_length(list, term) \
av_int_list_length_for_size(sizeof(*(list)), list, term)
/**
* Open a file using a UTF-8 filename.
* The API of this function matches POSIX fopen(), errors are returned through
* errno.
*/
FILE *av_fopen_utf8(const char *path, const char *mode);
/**
* Return the fractional representation of the internal time base.
*/
AVRational av_get_time_base_q(void);
#define AV_FOURCC_MAX_STRING_SIZE 32
#define av_fourcc2str(fourcc) av_fourcc_make_string((char[AV_FOURCC_MAX_STRING_SIZE]){0}, fourcc)
/**
* Fill the provided buffer with a string containing a FourCC (four-character
* code) representation.
*
* @param buf a buffer with size in bytes of at least AV_FOURCC_MAX_STRING_SIZE
* @param fourcc the fourcc to represent
* @return the buffer in input
*/
char *av_fourcc_make_string(char *buf, uint32_t fourcc);
/**
* @}
* @}
*/
#endif /* AVUTIL_AVUTIL_H */

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/*
* Copyright (c) 2006 Ryan Martell. (rdm4@martellventures.com)
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_BASE64_H
#define AVUTIL_BASE64_H
#include <stdint.h>
/**
* @defgroup lavu_base64 Base64
* @ingroup lavu_crypto
* @{
*/
/**
* Decode a base64-encoded string.
*
* @param out buffer for decoded data
* @param in null-terminated input string
* @param out_size size in bytes of the out buffer, must be at
* least 3/4 of the length of in, that is AV_BASE64_DECODE_SIZE(strlen(in))
* @return number of bytes written, or a negative value in case of
* invalid input
*/
int av_base64_decode(uint8_t *out, const char *in, int out_size);
/**
* Calculate the output size in bytes needed to decode a base64 string
* with length x to a data buffer.
*/
#define AV_BASE64_DECODE_SIZE(x) ((x) * 3LL / 4)
/**
* Encode data to base64 and null-terminate.
*
* @param out buffer for encoded data
* @param out_size size in bytes of the out buffer (including the
* null terminator), must be at least AV_BASE64_SIZE(in_size)
* @param in input buffer containing the data to encode
* @param in_size size in bytes of the in buffer
* @return out or NULL in case of error
*/
char *av_base64_encode(char *out, int out_size, const uint8_t *in, int in_size);
/**
* Calculate the output size needed to base64-encode x bytes to a
* null-terminated string.
*/
#define AV_BASE64_SIZE(x) (((x)+2) / 3 * 4 + 1)
/**
* @}
*/
#endif /* AVUTIL_BASE64_H */

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/*
* Blowfish algorithm
* Copyright (c) 2012 Samuel Pitoiset
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_BLOWFISH_H
#define AVUTIL_BLOWFISH_H
#include <stdint.h>
/**
* @defgroup lavu_blowfish Blowfish
* @ingroup lavu_crypto
* @{
*/
#define AV_BF_ROUNDS 16
typedef struct AVBlowfish {
uint32_t p[AV_BF_ROUNDS + 2];
uint32_t s[4][256];
} AVBlowfish;
/**
* Allocate an AVBlowfish context.
*/
AVBlowfish *av_blowfish_alloc(void);
/**
* Initialize an AVBlowfish context.
*
* @param ctx an AVBlowfish context
* @param key a key
* @param key_len length of the key
*/
void av_blowfish_init(struct AVBlowfish *ctx, const uint8_t *key, int key_len);
/**
* Encrypt or decrypt a buffer using a previously initialized context.
*
* @param ctx an AVBlowfish context
* @param xl left four bytes halves of input to be encrypted
* @param xr right four bytes halves of input to be encrypted
* @param decrypt 0 for encryption, 1 for decryption
*/
void av_blowfish_crypt_ecb(struct AVBlowfish *ctx, uint32_t *xl, uint32_t *xr,
int decrypt);
/**
* Encrypt or decrypt a buffer using a previously initialized context.
*
* @param ctx an AVBlowfish context
* @param dst destination array, can be equal to src
* @param src source array, can be equal to dst
* @param count number of 8 byte blocks
* @param iv initialization vector for CBC mode, if NULL ECB will be used
* @param decrypt 0 for encryption, 1 for decryption
*/
void av_blowfish_crypt(struct AVBlowfish *ctx, uint8_t *dst, const uint8_t *src,
int count, uint8_t *iv, int decrypt);
/**
* @}
*/
#endif /* AVUTIL_BLOWFISH_H */

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/*
* Copyright (c) 2012 Nicolas George
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_BPRINT_H
#define AVUTIL_BPRINT_H
#include <stdarg.h>
#include "attributes.h"
#include "avstring.h"
/**
* Define a structure with extra padding to a fixed size
* This helps ensuring binary compatibility with future versions.
*/
#define FF_PAD_STRUCTURE(name, size, ...) \
struct ff_pad_helper_##name { __VA_ARGS__ }; \
typedef struct name { \
__VA_ARGS__ \
char reserved_padding[size - sizeof(struct ff_pad_helper_##name)]; \
} name;
/**
* Buffer to print data progressively
*
* The string buffer grows as necessary and is always 0-terminated.
* The content of the string is never accessed, and thus is
* encoding-agnostic and can even hold binary data.
*
* Small buffers are kept in the structure itself, and thus require no
* memory allocation at all (unless the contents of the buffer is needed
* after the structure goes out of scope). This is almost as lightweight as
* declaring a local "char buf[512]".
*
* The length of the string can go beyond the allocated size: the buffer is
* then truncated, but the functions still keep account of the actual total
* length.
*
* In other words, buf->len can be greater than buf->size and records the
* total length of what would have been to the buffer if there had been
* enough memory.
*
* Append operations do not need to be tested for failure: if a memory
* allocation fails, data stop being appended to the buffer, but the length
* is still updated. This situation can be tested with
* av_bprint_is_complete().
*
* The size_max field determines several possible behaviours:
*
* size_max = -1 (= UINT_MAX) or any large value will let the buffer be
* reallocated as necessary, with an amortized linear cost.
*
* size_max = 0 prevents writing anything to the buffer: only the total
* length is computed. The write operations can then possibly be repeated in
* a buffer with exactly the necessary size
* (using size_init = size_max = len + 1).
*
* size_max = 1 is automatically replaced by the exact size available in the
* structure itself, thus ensuring no dynamic memory allocation. The
* internal buffer is large enough to hold a reasonable paragraph of text,
* such as the current paragraph.
*/
FF_PAD_STRUCTURE(AVBPrint, 1024,
char *str; /**< string so far */
unsigned len; /**< length so far */
unsigned size; /**< allocated memory */
unsigned size_max; /**< maximum allocated memory */
char reserved_internal_buffer[1];
)
/**
* Convenience macros for special values for av_bprint_init() size_max
* parameter.
*/
#define AV_BPRINT_SIZE_UNLIMITED ((unsigned)-1)
#define AV_BPRINT_SIZE_AUTOMATIC 1
#define AV_BPRINT_SIZE_COUNT_ONLY 0
/**
* Init a print buffer.
*
* @param buf buffer to init
* @param size_init initial size (including the final 0)
* @param size_max maximum size;
* 0 means do not write anything, just count the length;
* 1 is replaced by the maximum value for automatic storage;
* any large value means that the internal buffer will be
* reallocated as needed up to that limit; -1 is converted to
* UINT_MAX, the largest limit possible.
* Check also AV_BPRINT_SIZE_* macros.
*/
void av_bprint_init(AVBPrint *buf, unsigned size_init, unsigned size_max);
/**
* Init a print buffer using a pre-existing buffer.
*
* The buffer will not be reallocated.
*
* @param buf buffer structure to init
* @param buffer byte buffer to use for the string data
* @param size size of buffer
*/
void av_bprint_init_for_buffer(AVBPrint *buf, char *buffer, unsigned size);
/**
* Append a formatted string to a print buffer.
*/
void av_bprintf(AVBPrint *buf, const char *fmt, ...) av_printf_format(2, 3);
/**
* Append a formatted string to a print buffer.
*/
void av_vbprintf(AVBPrint *buf, const char *fmt, va_list vl_arg);
/**
* Append char c n times to a print buffer.
*/
void av_bprint_chars(AVBPrint *buf, char c, unsigned n);
/**
* Append data to a print buffer.
*
* param buf bprint buffer to use
* param data pointer to data
* param size size of data
*/
void av_bprint_append_data(AVBPrint *buf, const char *data, unsigned size);
struct tm;
/**
* Append a formatted date and time to a print buffer.
*
* param buf bprint buffer to use
* param fmt date and time format string, see strftime()
* param tm broken-down time structure to translate
*
* @note due to poor design of the standard strftime function, it may
* produce poor results if the format string expands to a very long text and
* the bprint buffer is near the limit stated by the size_max option.
*/
void av_bprint_strftime(AVBPrint *buf, const char *fmt, const struct tm *tm);
/**
* Allocate bytes in the buffer for external use.
*
* @param[in] buf buffer structure
* @param[in] size required size
* @param[out] mem pointer to the memory area
* @param[out] actual_size size of the memory area after allocation;
* can be larger or smaller than size
*/
void av_bprint_get_buffer(AVBPrint *buf, unsigned size,
unsigned char **mem, unsigned *actual_size);
/**
* Reset the string to "" but keep internal allocated data.
*/
void av_bprint_clear(AVBPrint *buf);
/**
* Test if the print buffer is complete (not truncated).
*
* It may have been truncated due to a memory allocation failure
* or the size_max limit (compare size and size_max if necessary).
*/
static inline int av_bprint_is_complete(const AVBPrint *buf)
{
return buf->len < buf->size;
}
/**
* Finalize a print buffer.
*
* The print buffer can no longer be used afterwards,
* but the len and size fields are still valid.
*
* @arg[out] ret_str if not NULL, used to return a permanent copy of the
* buffer contents, or NULL if memory allocation fails;
* if NULL, the buffer is discarded and freed
* @return 0 for success or error code (probably AVERROR(ENOMEM))
*/
int av_bprint_finalize(AVBPrint *buf, char **ret_str);
/**
* Escape the content in src and append it to dstbuf.
*
* @param dstbuf already inited destination bprint buffer
* @param src string containing the text to escape
* @param special_chars string containing the special characters which
* need to be escaped, can be NULL
* @param mode escape mode to employ, see AV_ESCAPE_MODE_* macros.
* Any unknown value for mode will be considered equivalent to
* AV_ESCAPE_MODE_BACKSLASH, but this behaviour can change without
* notice.
* @param flags flags which control how to escape, see AV_ESCAPE_FLAG_* macros
*/
void av_bprint_escape(AVBPrint *dstbuf, const char *src, const char *special_chars,
enum AVEscapeMode mode, int flags);
#endif /* AVUTIL_BPRINT_H */

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/*
* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* byte swapping routines
*/
#ifndef AVUTIL_BSWAP_H
#define AVUTIL_BSWAP_H
#include <stdint.h>
#include "libavutil/avconfig.h"
#include "attributes.h"
#ifdef HAVE_AV_CONFIG_H
#include "config.h"
#if ARCH_AARCH64
# include "aarch64/bswap.h"
#elif ARCH_ARM
# include "arm/bswap.h"
#elif ARCH_AVR32
# include "avr32/bswap.h"
#elif ARCH_SH4
# include "sh4/bswap.h"
#elif ARCH_X86
# include "x86/bswap.h"
#endif
#endif /* HAVE_AV_CONFIG_H */
#define AV_BSWAP16C(x) (((x) << 8 & 0xff00) | ((x) >> 8 & 0x00ff))
#define AV_BSWAP32C(x) (AV_BSWAP16C(x) << 16 | AV_BSWAP16C((x) >> 16))
#define AV_BSWAP64C(x) (AV_BSWAP32C(x) << 32 | AV_BSWAP32C((x) >> 32))
#define AV_BSWAPC(s, x) AV_BSWAP##s##C(x)
#ifndef av_bswap16
static av_always_inline av_const uint16_t av_bswap16(uint16_t x)
{
x= (x>>8) | (x<<8);
return x;
}
#endif
#ifndef av_bswap32
static av_always_inline av_const uint32_t av_bswap32(uint32_t x)
{
return AV_BSWAP32C(x);
}
#endif
#ifndef av_bswap64
static inline uint64_t av_const av_bswap64(uint64_t x)
{
return (uint64_t)av_bswap32(x) << 32 | av_bswap32(x >> 32);
}
#endif
// be2ne ... big-endian to native-endian
// le2ne ... little-endian to native-endian
#if AV_HAVE_BIGENDIAN
#define av_be2ne16(x) (x)
#define av_be2ne32(x) (x)
#define av_be2ne64(x) (x)
#define av_le2ne16(x) av_bswap16(x)
#define av_le2ne32(x) av_bswap32(x)
#define av_le2ne64(x) av_bswap64(x)
#define AV_BE2NEC(s, x) (x)
#define AV_LE2NEC(s, x) AV_BSWAPC(s, x)
#else
#define av_be2ne16(x) av_bswap16(x)
#define av_be2ne32(x) av_bswap32(x)
#define av_be2ne64(x) av_bswap64(x)
#define av_le2ne16(x) (x)
#define av_le2ne32(x) (x)
#define av_le2ne64(x) (x)
#define AV_BE2NEC(s, x) AV_BSWAPC(s, x)
#define AV_LE2NEC(s, x) (x)
#endif
#define AV_BE2NE16C(x) AV_BE2NEC(16, x)
#define AV_BE2NE32C(x) AV_BE2NEC(32, x)
#define AV_BE2NE64C(x) AV_BE2NEC(64, x)
#define AV_LE2NE16C(x) AV_LE2NEC(16, x)
#define AV_LE2NE32C(x) AV_LE2NEC(32, x)
#define AV_LE2NE64C(x) AV_LE2NEC(64, x)
#endif /* AVUTIL_BSWAP_H */

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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* @ingroup lavu_buffer
* refcounted data buffer API
*/
#ifndef AVUTIL_BUFFER_H
#define AVUTIL_BUFFER_H
#include <stdint.h>
/**
* @defgroup lavu_buffer AVBuffer
* @ingroup lavu_data
*
* @{
* AVBuffer is an API for reference-counted data buffers.
*
* There are two core objects in this API -- AVBuffer and AVBufferRef. AVBuffer
* represents the data buffer itself; it is opaque and not meant to be accessed
* by the caller directly, but only through AVBufferRef. However, the caller may
* e.g. compare two AVBuffer pointers to check whether two different references
* are describing the same data buffer. AVBufferRef represents a single
* reference to an AVBuffer and it is the object that may be manipulated by the
* caller directly.
*
* There are two functions provided for creating a new AVBuffer with a single
* reference -- av_buffer_alloc() to just allocate a new buffer, and
* av_buffer_create() to wrap an existing array in an AVBuffer. From an existing
* reference, additional references may be created with av_buffer_ref().
* Use av_buffer_unref() to free a reference (this will automatically free the
* data once all the references are freed).
*
* The convention throughout this API and the rest of FFmpeg is such that the
* buffer is considered writable if there exists only one reference to it (and
* it has not been marked as read-only). The av_buffer_is_writable() function is
* provided to check whether this is true and av_buffer_make_writable() will
* automatically create a new writable buffer when necessary.
* Of course nothing prevents the calling code from violating this convention,
* however that is safe only when all the existing references are under its
* control.
*
* @note Referencing and unreferencing the buffers is thread-safe and thus
* may be done from multiple threads simultaneously without any need for
* additional locking.
*
* @note Two different references to the same buffer can point to different
* parts of the buffer (i.e. their AVBufferRef.data will not be equal).
*/
/**
* A reference counted buffer type. It is opaque and is meant to be used through
* references (AVBufferRef).
*/
typedef struct AVBuffer AVBuffer;
/**
* A reference to a data buffer.
*
* The size of this struct is not a part of the public ABI and it is not meant
* to be allocated directly.
*/
typedef struct AVBufferRef {
AVBuffer *buffer;
/**
* The data buffer. It is considered writable if and only if
* this is the only reference to the buffer, in which case
* av_buffer_is_writable() returns 1.
*/
uint8_t *data;
/**
* Size of data in bytes.
*/
int size;
} AVBufferRef;
/**
* Allocate an AVBuffer of the given size using av_malloc().
*
* @return an AVBufferRef of given size or NULL when out of memory
*/
AVBufferRef *av_buffer_alloc(int size);
/**
* Same as av_buffer_alloc(), except the returned buffer will be initialized
* to zero.
*/
AVBufferRef *av_buffer_allocz(int size);
/**
* Always treat the buffer as read-only, even when it has only one
* reference.
*/
#define AV_BUFFER_FLAG_READONLY (1 << 0)
/**
* Create an AVBuffer from an existing array.
*
* If this function is successful, data is owned by the AVBuffer. The caller may
* only access data through the returned AVBufferRef and references derived from
* it.
* If this function fails, data is left untouched.
* @param data data array
* @param size size of data in bytes
* @param free a callback for freeing this buffer's data
* @param opaque parameter to be got for processing or passed to free
* @param flags a combination of AV_BUFFER_FLAG_*
*
* @return an AVBufferRef referring to data on success, NULL on failure.
*/
AVBufferRef *av_buffer_create(uint8_t *data, int size,
void (*free)(void *opaque, uint8_t *data),
void *opaque, int flags);
/**
* Default free callback, which calls av_free() on the buffer data.
* This function is meant to be passed to av_buffer_create(), not called
* directly.
*/
void av_buffer_default_free(void *opaque, uint8_t *data);
/**
* Create a new reference to an AVBuffer.
*
* @return a new AVBufferRef referring to the same AVBuffer as buf or NULL on
* failure.
*/
AVBufferRef *av_buffer_ref(AVBufferRef *buf);
/**
* Free a given reference and automatically free the buffer if there are no more
* references to it.
*
* @param buf the reference to be freed. The pointer is set to NULL on return.
*/
void av_buffer_unref(AVBufferRef **buf);
/**
* @return 1 if the caller may write to the data referred to by buf (which is
* true if and only if buf is the only reference to the underlying AVBuffer).
* Return 0 otherwise.
* A positive answer is valid until av_buffer_ref() is called on buf.
*/
int av_buffer_is_writable(const AVBufferRef *buf);
/**
* @return the opaque parameter set by av_buffer_create.
*/
void *av_buffer_get_opaque(const AVBufferRef *buf);
int av_buffer_get_ref_count(const AVBufferRef *buf);
/**
* Create a writable reference from a given buffer reference, avoiding data copy
* if possible.
*
* @param buf buffer reference to make writable. On success, buf is either left
* untouched, or it is unreferenced and a new writable AVBufferRef is
* written in its place. On failure, buf is left untouched.
* @return 0 on success, a negative AVERROR on failure.
*/
int av_buffer_make_writable(AVBufferRef **buf);
/**
* Reallocate a given buffer.
*
* @param buf a buffer reference to reallocate. On success, buf will be
* unreferenced and a new reference with the required size will be
* written in its place. On failure buf will be left untouched. *buf
* may be NULL, then a new buffer is allocated.
* @param size required new buffer size.
* @return 0 on success, a negative AVERROR on failure.
*
* @note the buffer is actually reallocated with av_realloc() only if it was
* initially allocated through av_buffer_realloc(NULL) and there is only one
* reference to it (i.e. the one passed to this function). In all other cases
* a new buffer is allocated and the data is copied.
*/
int av_buffer_realloc(AVBufferRef **buf, int size);
/**
* @}
*/
/**
* @defgroup lavu_bufferpool AVBufferPool
* @ingroup lavu_data
*
* @{
* AVBufferPool is an API for a lock-free thread-safe pool of AVBuffers.
*
* Frequently allocating and freeing large buffers may be slow. AVBufferPool is
* meant to solve this in cases when the caller needs a set of buffers of the
* same size (the most obvious use case being buffers for raw video or audio
* frames).
*
* At the beginning, the user must call av_buffer_pool_init() to create the
* buffer pool. Then whenever a buffer is needed, call av_buffer_pool_get() to
* get a reference to a new buffer, similar to av_buffer_alloc(). This new
* reference works in all aspects the same way as the one created by
* av_buffer_alloc(). However, when the last reference to this buffer is
* unreferenced, it is returned to the pool instead of being freed and will be
* reused for subsequent av_buffer_pool_get() calls.
*
* When the caller is done with the pool and no longer needs to allocate any new
* buffers, av_buffer_pool_uninit() must be called to mark the pool as freeable.
* Once all the buffers are released, it will automatically be freed.
*
* Allocating and releasing buffers with this API is thread-safe as long as
* either the default alloc callback is used, or the user-supplied one is
* thread-safe.
*/
/**
* The buffer pool. This structure is opaque and not meant to be accessed
* directly. It is allocated with av_buffer_pool_init() and freed with
* av_buffer_pool_uninit().
*/
typedef struct AVBufferPool AVBufferPool;
/**
* Allocate and initialize a buffer pool.
*
* @param size size of each buffer in this pool
* @param alloc a function that will be used to allocate new buffers when the
* pool is empty. May be NULL, then the default allocator will be used
* (av_buffer_alloc()).
* @return newly created buffer pool on success, NULL on error.
*/
AVBufferPool *av_buffer_pool_init(int size, AVBufferRef* (*alloc)(int size));
/**
* Allocate and initialize a buffer pool with a more complex allocator.
*
* @param size size of each buffer in this pool
* @param opaque arbitrary user data used by the allocator
* @param alloc a function that will be used to allocate new buffers when the
* pool is empty.
* @param pool_free a function that will be called immediately before the pool
* is freed. I.e. after av_buffer_pool_uninit() is called
* by the caller and all the frames are returned to the pool
* and freed. It is intended to uninitialize the user opaque
* data.
* @return newly created buffer pool on success, NULL on error.
*/
AVBufferPool *av_buffer_pool_init2(int size, void *opaque,
AVBufferRef* (*alloc)(void *opaque, int size),
void (*pool_free)(void *opaque));
/**
* Mark the pool as being available for freeing. It will actually be freed only
* once all the allocated buffers associated with the pool are released. Thus it
* is safe to call this function while some of the allocated buffers are still
* in use.
*
* @param pool pointer to the pool to be freed. It will be set to NULL.
*/
void av_buffer_pool_uninit(AVBufferPool **pool);
/**
* Allocate a new AVBuffer, reusing an old buffer from the pool when available.
* This function may be called simultaneously from multiple threads.
*
* @return a reference to the new buffer on success, NULL on error.
*/
AVBufferRef *av_buffer_pool_get(AVBufferPool *pool);
/**
* @}
*/
#endif /* AVUTIL_BUFFER_H */

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/*
* An implementation of the CAMELLIA algorithm as mentioned in RFC3713
* Copyright (c) 2014 Supraja Meedinti
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_CAMELLIA_H
#define AVUTIL_CAMELLIA_H
#include <stdint.h>
/**
* @file
* @brief Public header for libavutil CAMELLIA algorithm
* @defgroup lavu_camellia CAMELLIA
* @ingroup lavu_crypto
* @{
*/
extern const int av_camellia_size;
struct AVCAMELLIA;
/**
* Allocate an AVCAMELLIA context
* To free the struct: av_free(ptr)
*/
struct AVCAMELLIA *av_camellia_alloc(void);
/**
* Initialize an AVCAMELLIA context.
*
* @param ctx an AVCAMELLIA context
* @param key a key of 16, 24, 32 bytes used for encryption/decryption
* @param key_bits number of keybits: possible are 128, 192, 256
*/
int av_camellia_init(struct AVCAMELLIA *ctx, const uint8_t *key, int key_bits);
/**
* Encrypt or decrypt a buffer using a previously initialized context
*
* @param ctx an AVCAMELLIA context
* @param dst destination array, can be equal to src
* @param src source array, can be equal to dst
* @param count number of 16 byte blocks
* @paran iv initialization vector for CBC mode, NULL for ECB mode
* @param decrypt 0 for encryption, 1 for decryption
*/
void av_camellia_crypt(struct AVCAMELLIA *ctx, uint8_t *dst, const uint8_t *src, int count, uint8_t* iv, int decrypt);
/**
* @}
*/
#endif /* AVUTIL_CAMELLIA_H */

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/*
* An implementation of the CAST128 algorithm as mentioned in RFC2144
* Copyright (c) 2014 Supraja Meedinti
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_CAST5_H
#define AVUTIL_CAST5_H
#include <stdint.h>
/**
* @file
* @brief Public header for libavutil CAST5 algorithm
* @defgroup lavu_cast5 CAST5
* @ingroup lavu_crypto
* @{
*/
extern const int av_cast5_size;
struct AVCAST5;
/**
* Allocate an AVCAST5 context
* To free the struct: av_free(ptr)
*/
struct AVCAST5 *av_cast5_alloc(void);
/**
* Initialize an AVCAST5 context.
*
* @param ctx an AVCAST5 context
* @param key a key of 5,6,...16 bytes used for encryption/decryption
* @param key_bits number of keybits: possible are 40,48,...,128
* @return 0 on success, less than 0 on failure
*/
int av_cast5_init(struct AVCAST5 *ctx, const uint8_t *key, int key_bits);
/**
* Encrypt or decrypt a buffer using a previously initialized context, ECB mode only
*
* @param ctx an AVCAST5 context
* @param dst destination array, can be equal to src
* @param src source array, can be equal to dst
* @param count number of 8 byte blocks
* @param decrypt 0 for encryption, 1 for decryption
*/
void av_cast5_crypt(struct AVCAST5 *ctx, uint8_t *dst, const uint8_t *src, int count, int decrypt);
/**
* Encrypt or decrypt a buffer using a previously initialized context
*
* @param ctx an AVCAST5 context
* @param dst destination array, can be equal to src
* @param src source array, can be equal to dst
* @param count number of 8 byte blocks
* @param iv initialization vector for CBC mode, NULL for ECB mode
* @param decrypt 0 for encryption, 1 for decryption
*/
void av_cast5_crypt2(struct AVCAST5 *ctx, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt);
/**
* @}
*/
#endif /* AVUTIL_CAST5_H */

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/*
* Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
* Copyright (c) 2008 Peter Ross
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_CHANNEL_LAYOUT_H
#define AVUTIL_CHANNEL_LAYOUT_H
#include <stdint.h>
/**
* @file
* audio channel layout utility functions
*/
/**
* @addtogroup lavu_audio
* @{
*/
/**
* @defgroup channel_masks Audio channel masks
*
* A channel layout is a 64-bits integer with a bit set for every channel.
* The number of bits set must be equal to the number of channels.
* The value 0 means that the channel layout is not known.
* @note this data structure is not powerful enough to handle channels
* combinations that have the same channel multiple times, such as
* dual-mono.
*
* @{
*/
#define AV_CH_FRONT_LEFT 0x00000001
#define AV_CH_FRONT_RIGHT 0x00000002
#define AV_CH_FRONT_CENTER 0x00000004
#define AV_CH_LOW_FREQUENCY 0x00000008
#define AV_CH_BACK_LEFT 0x00000010
#define AV_CH_BACK_RIGHT 0x00000020
#define AV_CH_FRONT_LEFT_OF_CENTER 0x00000040
#define AV_CH_FRONT_RIGHT_OF_CENTER 0x00000080
#define AV_CH_BACK_CENTER 0x00000100
#define AV_CH_SIDE_LEFT 0x00000200
#define AV_CH_SIDE_RIGHT 0x00000400
#define AV_CH_TOP_CENTER 0x00000800
#define AV_CH_TOP_FRONT_LEFT 0x00001000
#define AV_CH_TOP_FRONT_CENTER 0x00002000
#define AV_CH_TOP_FRONT_RIGHT 0x00004000
#define AV_CH_TOP_BACK_LEFT 0x00008000
#define AV_CH_TOP_BACK_CENTER 0x00010000
#define AV_CH_TOP_BACK_RIGHT 0x00020000
#define AV_CH_STEREO_LEFT 0x20000000 ///< Stereo downmix.
#define AV_CH_STEREO_RIGHT 0x40000000 ///< See AV_CH_STEREO_LEFT.
#define AV_CH_WIDE_LEFT 0x0000000080000000ULL
#define AV_CH_WIDE_RIGHT 0x0000000100000000ULL
#define AV_CH_SURROUND_DIRECT_LEFT 0x0000000200000000ULL
#define AV_CH_SURROUND_DIRECT_RIGHT 0x0000000400000000ULL
#define AV_CH_LOW_FREQUENCY_2 0x0000000800000000ULL
/** Channel mask value used for AVCodecContext.request_channel_layout
to indicate that the user requests the channel order of the decoder output
to be the native codec channel order. */
#define AV_CH_LAYOUT_NATIVE 0x8000000000000000ULL
/**
* @}
* @defgroup channel_mask_c Audio channel layouts
* @{
* */
#define AV_CH_LAYOUT_MONO (AV_CH_FRONT_CENTER)
#define AV_CH_LAYOUT_STEREO (AV_CH_FRONT_LEFT|AV_CH_FRONT_RIGHT)
#define AV_CH_LAYOUT_2POINT1 (AV_CH_LAYOUT_STEREO|AV_CH_LOW_FREQUENCY)
#define AV_CH_LAYOUT_2_1 (AV_CH_LAYOUT_STEREO|AV_CH_BACK_CENTER)
#define AV_CH_LAYOUT_SURROUND (AV_CH_LAYOUT_STEREO|AV_CH_FRONT_CENTER)
#define AV_CH_LAYOUT_3POINT1 (AV_CH_LAYOUT_SURROUND|AV_CH_LOW_FREQUENCY)
#define AV_CH_LAYOUT_4POINT0 (AV_CH_LAYOUT_SURROUND|AV_CH_BACK_CENTER)
#define AV_CH_LAYOUT_4POINT1 (AV_CH_LAYOUT_4POINT0|AV_CH_LOW_FREQUENCY)
#define AV_CH_LAYOUT_2_2 (AV_CH_LAYOUT_STEREO|AV_CH_SIDE_LEFT|AV_CH_SIDE_RIGHT)
#define AV_CH_LAYOUT_QUAD (AV_CH_LAYOUT_STEREO|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT)
#define AV_CH_LAYOUT_5POINT0 (AV_CH_LAYOUT_SURROUND|AV_CH_SIDE_LEFT|AV_CH_SIDE_RIGHT)
#define AV_CH_LAYOUT_5POINT1 (AV_CH_LAYOUT_5POINT0|AV_CH_LOW_FREQUENCY)
#define AV_CH_LAYOUT_5POINT0_BACK (AV_CH_LAYOUT_SURROUND|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT)
#define AV_CH_LAYOUT_5POINT1_BACK (AV_CH_LAYOUT_5POINT0_BACK|AV_CH_LOW_FREQUENCY)
#define AV_CH_LAYOUT_6POINT0 (AV_CH_LAYOUT_5POINT0|AV_CH_BACK_CENTER)
#define AV_CH_LAYOUT_6POINT0_FRONT (AV_CH_LAYOUT_2_2|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
#define AV_CH_LAYOUT_HEXAGONAL (AV_CH_LAYOUT_5POINT0_BACK|AV_CH_BACK_CENTER)
#define AV_CH_LAYOUT_6POINT1 (AV_CH_LAYOUT_5POINT1|AV_CH_BACK_CENTER)
#define AV_CH_LAYOUT_6POINT1_BACK (AV_CH_LAYOUT_5POINT1_BACK|AV_CH_BACK_CENTER)
#define AV_CH_LAYOUT_6POINT1_FRONT (AV_CH_LAYOUT_6POINT0_FRONT|AV_CH_LOW_FREQUENCY)
#define AV_CH_LAYOUT_7POINT0 (AV_CH_LAYOUT_5POINT0|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT)
#define AV_CH_LAYOUT_7POINT0_FRONT (AV_CH_LAYOUT_5POINT0|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
#define AV_CH_LAYOUT_7POINT1 (AV_CH_LAYOUT_5POINT1|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT)
#define AV_CH_LAYOUT_7POINT1_WIDE (AV_CH_LAYOUT_5POINT1|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
#define AV_CH_LAYOUT_7POINT1_WIDE_BACK (AV_CH_LAYOUT_5POINT1_BACK|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
#define AV_CH_LAYOUT_OCTAGONAL (AV_CH_LAYOUT_5POINT0|AV_CH_BACK_LEFT|AV_CH_BACK_CENTER|AV_CH_BACK_RIGHT)
#define AV_CH_LAYOUT_HEXADECAGONAL (AV_CH_LAYOUT_OCTAGONAL|AV_CH_WIDE_LEFT|AV_CH_WIDE_RIGHT|AV_CH_TOP_BACK_LEFT|AV_CH_TOP_BACK_RIGHT|AV_CH_TOP_BACK_CENTER|AV_CH_TOP_FRONT_CENTER|AV_CH_TOP_FRONT_LEFT|AV_CH_TOP_FRONT_RIGHT)
#define AV_CH_LAYOUT_STEREO_DOWNMIX (AV_CH_STEREO_LEFT|AV_CH_STEREO_RIGHT)
enum AVMatrixEncoding {
AV_MATRIX_ENCODING_NONE,
AV_MATRIX_ENCODING_DOLBY,
AV_MATRIX_ENCODING_DPLII,
AV_MATRIX_ENCODING_DPLIIX,
AV_MATRIX_ENCODING_DPLIIZ,
AV_MATRIX_ENCODING_DOLBYEX,
AV_MATRIX_ENCODING_DOLBYHEADPHONE,
AV_MATRIX_ENCODING_NB
};
/**
* Return a channel layout id that matches name, or 0 if no match is found.
*
* name can be one or several of the following notations,
* separated by '+' or '|':
* - the name of an usual channel layout (mono, stereo, 4.0, quad, 5.0,
* 5.0(side), 5.1, 5.1(side), 7.1, 7.1(wide), downmix);
* - the name of a single channel (FL, FR, FC, LFE, BL, BR, FLC, FRC, BC,
* SL, SR, TC, TFL, TFC, TFR, TBL, TBC, TBR, DL, DR);
* - a number of channels, in decimal, followed by 'c', yielding
* the default channel layout for that number of channels (@see
* av_get_default_channel_layout);
* - a channel layout mask, in hexadecimal starting with "0x" (see the
* AV_CH_* macros).
*
* Example: "stereo+FC" = "2c+FC" = "2c+1c" = "0x7"
*/
uint64_t av_get_channel_layout(const char *name);
/**
* Return a channel layout and the number of channels based on the specified name.
*
* This function is similar to (@see av_get_channel_layout), but can also parse
* unknown channel layout specifications.
*
* @param[in] name channel layout specification string
* @param[out] channel_layout parsed channel layout (0 if unknown)
* @param[out] nb_channels number of channels
*
* @return 0 on success, AVERROR(EINVAL) if the parsing fails.
*/
int av_get_extended_channel_layout(const char *name, uint64_t* channel_layout, int* nb_channels);
/**
* Return a description of a channel layout.
* If nb_channels is <= 0, it is guessed from the channel_layout.
*
* @param buf put here the string containing the channel layout
* @param buf_size size in bytes of the buffer
*/
void av_get_channel_layout_string(char *buf, int buf_size, int nb_channels, uint64_t channel_layout);
struct AVBPrint;
/**
* Append a description of a channel layout to a bprint buffer.
*/
void av_bprint_channel_layout(struct AVBPrint *bp, int nb_channels, uint64_t channel_layout);
/**
* Return the number of channels in the channel layout.
*/
int av_get_channel_layout_nb_channels(uint64_t channel_layout);
/**
* Return default channel layout for a given number of channels.
*/
int64_t av_get_default_channel_layout(int nb_channels);
/**
* Get the index of a channel in channel_layout.
*
* @param channel a channel layout describing exactly one channel which must be
* present in channel_layout.
*
* @return index of channel in channel_layout on success, a negative AVERROR
* on error.
*/
int av_get_channel_layout_channel_index(uint64_t channel_layout,
uint64_t channel);
/**
* Get the channel with the given index in channel_layout.
*/
uint64_t av_channel_layout_extract_channel(uint64_t channel_layout, int index);
/**
* Get the name of a given channel.
*
* @return channel name on success, NULL on error.
*/
const char *av_get_channel_name(uint64_t channel);
/**
* Get the description of a given channel.
*
* @param channel a channel layout with a single channel
* @return channel description on success, NULL on error
*/
const char *av_get_channel_description(uint64_t channel);
/**
* Get the value and name of a standard channel layout.
*
* @param[in] index index in an internal list, starting at 0
* @param[out] layout channel layout mask
* @param[out] name name of the layout
* @return 0 if the layout exists,
* <0 if index is beyond the limits
*/
int av_get_standard_channel_layout(unsigned index, uint64_t *layout,
const char **name);
/**
* @}
* @}
*/
#endif /* AVUTIL_CHANNEL_LAYOUT_H */

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/*
* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* common internal and external API header
*/
#ifndef AVUTIL_COMMON_H
#define AVUTIL_COMMON_H
#if defined(__cplusplus) && !defined(__STDC_CONSTANT_MACROS) && !defined(UINT64_C)
#error missing -D__STDC_CONSTANT_MACROS / #define __STDC_CONSTANT_MACROS
#endif
#include <errno.h>
#include <inttypes.h>
#include <limits.h>
#include <math.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "attributes.h"
#include "macros.h"
#include "version.h"
#include "libavutil/avconfig.h"
#if AV_HAVE_BIGENDIAN
# define AV_NE(be, le) (be)
#else
# define AV_NE(be, le) (le)
#endif
//rounded division & shift
#define RSHIFT(a,b) ((a) > 0 ? ((a) + ((1<<(b))>>1))>>(b) : ((a) + ((1<<(b))>>1)-1)>>(b))
/* assume b>0 */
#define ROUNDED_DIV(a,b) (((a)>0 ? (a) + ((b)>>1) : (a) - ((b)>>1))/(b))
/* Fast a/(1<<b) rounded toward +inf. Assume a>=0 and b>=0 */
#define AV_CEIL_RSHIFT(a,b) (!av_builtin_constant_p(b) ? -((-(a)) >> (b)) \
: ((a) + (1<<(b)) - 1) >> (b))
/* Backwards compat. */
#define FF_CEIL_RSHIFT AV_CEIL_RSHIFT
#define FFUDIV(a,b) (((a)>0 ?(a):(a)-(b)+1) / (b))
#define FFUMOD(a,b) ((a)-(b)*FFUDIV(a,b))
/**
* Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they
* are not representable as absolute values of their type. This is the same
* as with *abs()
* @see FFNABS()
*/
#define FFABS(a) ((a) >= 0 ? (a) : (-(a)))
#define FFSIGN(a) ((a) > 0 ? 1 : -1)
/**
* Negative Absolute value.
* this works for all integers of all types.
* As with many macros, this evaluates its argument twice, it thus must not have
* a sideeffect, that is FFNABS(x++) has undefined behavior.
*/
#define FFNABS(a) ((a) <= 0 ? (a) : (-(a)))
/**
* Comparator.
* For two numerical expressions x and y, gives 1 if x > y, -1 if x < y, and 0
* if x == y. This is useful for instance in a qsort comparator callback.
* Furthermore, compilers are able to optimize this to branchless code, and
* there is no risk of overflow with signed types.
* As with many macros, this evaluates its argument multiple times, it thus
* must not have a side-effect.
*/
#define FFDIFFSIGN(x,y) (((x)>(y)) - ((x)<(y)))
#define FFMAX(a,b) ((a) > (b) ? (a) : (b))
#define FFMAX3(a,b,c) FFMAX(FFMAX(a,b),c)
#define FFMIN(a,b) ((a) > (b) ? (b) : (a))
#define FFMIN3(a,b,c) FFMIN(FFMIN(a,b),c)
#define FFSWAP(type,a,b) do{type SWAP_tmp= b; b= a; a= SWAP_tmp;}while(0)
#define FF_ARRAY_ELEMS(a) (sizeof(a) / sizeof((a)[0]))
/* misc math functions */
#ifdef HAVE_AV_CONFIG_H
# include "config.h"
# include "intmath.h"
#endif
/* Pull in unguarded fallback defines at the end of this file. */
#include "common.h"
#ifndef av_log2
av_const int av_log2(unsigned v);
#endif
#ifndef av_log2_16bit
av_const int av_log2_16bit(unsigned v);
#endif
/**
* Clip a signed integer value into the amin-amax range.
* @param a value to clip
* @param amin minimum value of the clip range
* @param amax maximum value of the clip range
* @return clipped value
*/
static av_always_inline av_const int av_clip_c(int a, int amin, int amax)
{
#if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
if (amin > amax) abort();
#endif
if (a < amin) return amin;
else if (a > amax) return amax;
else return a;
}
/**
* Clip a signed 64bit integer value into the amin-amax range.
* @param a value to clip
* @param amin minimum value of the clip range
* @param amax maximum value of the clip range
* @return clipped value
*/
static av_always_inline av_const int64_t av_clip64_c(int64_t a, int64_t amin, int64_t amax)
{
#if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
if (amin > amax) abort();
#endif
if (a < amin) return amin;
else if (a > amax) return amax;
else return a;
}
/**
* Clip a signed integer value into the 0-255 range.
* @param a value to clip
* @return clipped value
*/
static av_always_inline av_const uint8_t av_clip_uint8_c(int a)
{
if (a&(~0xFF)) return (~a)>>31;
else return a;
}
/**
* Clip a signed integer value into the -128,127 range.
* @param a value to clip
* @return clipped value
*/
static av_always_inline av_const int8_t av_clip_int8_c(int a)
{
if ((a+0x80U) & ~0xFF) return (a>>31) ^ 0x7F;
else return a;
}
/**
* Clip a signed integer value into the 0-65535 range.
* @param a value to clip
* @return clipped value
*/
static av_always_inline av_const uint16_t av_clip_uint16_c(int a)
{
if (a&(~0xFFFF)) return (~a)>>31;
else return a;
}
/**
* Clip a signed integer value into the -32768,32767 range.
* @param a value to clip
* @return clipped value
*/
static av_always_inline av_const int16_t av_clip_int16_c(int a)
{
if ((a+0x8000U) & ~0xFFFF) return (a>>31) ^ 0x7FFF;
else return a;
}
/**
* Clip a signed 64-bit integer value into the -2147483648,2147483647 range.
* @param a value to clip
* @return clipped value
*/
static av_always_inline av_const int32_t av_clipl_int32_c(int64_t a)
{
if ((a+0x80000000u) & ~UINT64_C(0xFFFFFFFF)) return (int32_t)((a>>63) ^ 0x7FFFFFFF);
else return (int32_t)a;
}
/**
* Clip a signed integer into the -(2^p),(2^p-1) range.
* @param a value to clip
* @param p bit position to clip at
* @return clipped value
*/
static av_always_inline av_const int av_clip_intp2_c(int a, int p)
{
if (((unsigned)a + (1 << p)) & ~((2 << p) - 1))
return (a >> 31) ^ ((1 << p) - 1);
else
return a;
}
/**
* Clip a signed integer to an unsigned power of two range.
* @param a value to clip
* @param p bit position to clip at
* @return clipped value
*/
static av_always_inline av_const unsigned av_clip_uintp2_c(int a, int p)
{
if (a & ~((1<<p) - 1)) return (~a) >> 31 & ((1<<p) - 1);
else return a;
}
/**
* Clear high bits from an unsigned integer starting with specific bit position
* @param a value to clip
* @param p bit position to clip at
* @return clipped value
*/
static av_always_inline av_const unsigned av_mod_uintp2_c(unsigned a, unsigned p)
{
return a & ((1 << p) - 1);
}
/**
* Add two signed 32-bit values with saturation.
*
* @param a one value
* @param b another value
* @return sum with signed saturation
*/
static av_always_inline int av_sat_add32_c(int a, int b)
{
return av_clipl_int32((int64_t)a + b);
}
/**
* Add a doubled value to another value with saturation at both stages.
*
* @param a first value
* @param b value doubled and added to a
* @return sum with signed saturation
*/
static av_always_inline int av_sat_dadd32_c(int a, int b)
{
return av_sat_add32(a, av_sat_add32(b, b));
}
/**
* Clip a float value into the amin-amax range.
* @param a value to clip
* @param amin minimum value of the clip range
* @param amax maximum value of the clip range
* @return clipped value
*/
static av_always_inline av_const float av_clipf_c(float a, float amin, float amax)
{
#if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
if (amin > amax) abort();
#endif
if (a < amin) return amin;
else if (a > amax) return amax;
else return a;
}
/**
* Clip a double value into the amin-amax range.
* @param a value to clip
* @param amin minimum value of the clip range
* @param amax maximum value of the clip range
* @return clipped value
*/
static av_always_inline av_const double av_clipd_c(double a, double amin, double amax)
{
#if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
if (amin > amax) abort();
#endif
if (a < amin) return amin;
else if (a > amax) return amax;
else return a;
}
/** Compute ceil(log2(x)).
* @param x value used to compute ceil(log2(x))
* @return computed ceiling of log2(x)
*/
static av_always_inline av_const int av_ceil_log2_c(int x)
{
return av_log2((x - 1) << 1);
}
/**
* Count number of bits set to one in x
* @param x value to count bits of
* @return the number of bits set to one in x
*/
static av_always_inline av_const int av_popcount_c(uint32_t x)
{
x -= (x >> 1) & 0x55555555;
x = (x & 0x33333333) + ((x >> 2) & 0x33333333);
x = (x + (x >> 4)) & 0x0F0F0F0F;
x += x >> 8;
return (x + (x >> 16)) & 0x3F;
}
/**
* Count number of bits set to one in x
* @param x value to count bits of
* @return the number of bits set to one in x
*/
static av_always_inline av_const int av_popcount64_c(uint64_t x)
{
return av_popcount((uint32_t)x) + av_popcount((uint32_t)(x >> 32));
}
static av_always_inline av_const int av_parity_c(uint32_t v)
{
return av_popcount(v) & 1;
}
#define MKTAG(a,b,c,d) ((a) | ((b) << 8) | ((c) << 16) | ((unsigned)(d) << 24))
#define MKBETAG(a,b,c,d) ((d) | ((c) << 8) | ((b) << 16) | ((unsigned)(a) << 24))
/**
* Convert a UTF-8 character (up to 4 bytes) to its 32-bit UCS-4 encoded form.
*
* @param val Output value, must be an lvalue of type uint32_t.
* @param GET_BYTE Expression reading one byte from the input.
* Evaluated up to 7 times (4 for the currently
* assigned Unicode range). With a memory buffer
* input, this could be *ptr++.
* @param ERROR Expression to be evaluated on invalid input,
* typically a goto statement.
*
* @warning ERROR should not contain a loop control statement which
* could interact with the internal while loop, and should force an
* exit from the macro code (e.g. through a goto or a return) in order
* to prevent undefined results.
*/
#define GET_UTF8(val, GET_BYTE, ERROR)\
val= (GET_BYTE);\
{\
uint32_t top = (val & 128) >> 1;\
if ((val & 0xc0) == 0x80 || val >= 0xFE)\
ERROR\
while (val & top) {\
int tmp= (GET_BYTE) - 128;\
if(tmp>>6)\
ERROR\
val= (val<<6) + tmp;\
top <<= 5;\
}\
val &= (top << 1) - 1;\
}
/**
* Convert a UTF-16 character (2 or 4 bytes) to its 32-bit UCS-4 encoded form.
*
* @param val Output value, must be an lvalue of type uint32_t.
* @param GET_16BIT Expression returning two bytes of UTF-16 data converted
* to native byte order. Evaluated one or two times.
* @param ERROR Expression to be evaluated on invalid input,
* typically a goto statement.
*/
#define GET_UTF16(val, GET_16BIT, ERROR)\
val = GET_16BIT;\
{\
unsigned int hi = val - 0xD800;\
if (hi < 0x800) {\
val = GET_16BIT - 0xDC00;\
if (val > 0x3FFU || hi > 0x3FFU)\
ERROR\
val += (hi<<10) + 0x10000;\
}\
}\
/**
* @def PUT_UTF8(val, tmp, PUT_BYTE)
* Convert a 32-bit Unicode character to its UTF-8 encoded form (up to 4 bytes long).
* @param val is an input-only argument and should be of type uint32_t. It holds
* a UCS-4 encoded Unicode character that is to be converted to UTF-8. If
* val is given as a function it is executed only once.
* @param tmp is a temporary variable and should be of type uint8_t. It
* represents an intermediate value during conversion that is to be
* output by PUT_BYTE.
* @param PUT_BYTE writes the converted UTF-8 bytes to any proper destination.
* It could be a function or a statement, and uses tmp as the input byte.
* For example, PUT_BYTE could be "*output++ = tmp;" PUT_BYTE will be
* executed up to 4 times for values in the valid UTF-8 range and up to
* 7 times in the general case, depending on the length of the converted
* Unicode character.
*/
#define PUT_UTF8(val, tmp, PUT_BYTE)\
{\
int bytes, shift;\
uint32_t in = val;\
if (in < 0x80) {\
tmp = in;\
PUT_BYTE\
} else {\
bytes = (av_log2(in) + 4) / 5;\
shift = (bytes - 1) * 6;\
tmp = (256 - (256 >> bytes)) | (in >> shift);\
PUT_BYTE\
while (shift >= 6) {\
shift -= 6;\
tmp = 0x80 | ((in >> shift) & 0x3f);\
PUT_BYTE\
}\
}\
}
/**
* @def PUT_UTF16(val, tmp, PUT_16BIT)
* Convert a 32-bit Unicode character to its UTF-16 encoded form (2 or 4 bytes).
* @param val is an input-only argument and should be of type uint32_t. It holds
* a UCS-4 encoded Unicode character that is to be converted to UTF-16. If
* val is given as a function it is executed only once.
* @param tmp is a temporary variable and should be of type uint16_t. It
* represents an intermediate value during conversion that is to be
* output by PUT_16BIT.
* @param PUT_16BIT writes the converted UTF-16 data to any proper destination
* in desired endianness. It could be a function or a statement, and uses tmp
* as the input byte. For example, PUT_BYTE could be "*output++ = tmp;"
* PUT_BYTE will be executed 1 or 2 times depending on input character.
*/
#define PUT_UTF16(val, tmp, PUT_16BIT)\
{\
uint32_t in = val;\
if (in < 0x10000) {\
tmp = in;\
PUT_16BIT\
} else {\
tmp = 0xD800 | ((in - 0x10000) >> 10);\
PUT_16BIT\
tmp = 0xDC00 | ((in - 0x10000) & 0x3FF);\
PUT_16BIT\
}\
}\
#include "mem.h"
#ifdef HAVE_AV_CONFIG_H
# include "internal.h"
#endif /* HAVE_AV_CONFIG_H */
#endif /* AVUTIL_COMMON_H */
/*
* The following definitions are outside the multiple inclusion guard
* to ensure they are immediately available in intmath.h.
*/
#ifndef av_ceil_log2
# define av_ceil_log2 av_ceil_log2_c
#endif
#ifndef av_clip
# define av_clip av_clip_c
#endif
#ifndef av_clip64
# define av_clip64 av_clip64_c
#endif
#ifndef av_clip_uint8
# define av_clip_uint8 av_clip_uint8_c
#endif
#ifndef av_clip_int8
# define av_clip_int8 av_clip_int8_c
#endif
#ifndef av_clip_uint16
# define av_clip_uint16 av_clip_uint16_c
#endif
#ifndef av_clip_int16
# define av_clip_int16 av_clip_int16_c
#endif
#ifndef av_clipl_int32
# define av_clipl_int32 av_clipl_int32_c
#endif
#ifndef av_clip_intp2
# define av_clip_intp2 av_clip_intp2_c
#endif
#ifndef av_clip_uintp2
# define av_clip_uintp2 av_clip_uintp2_c
#endif
#ifndef av_mod_uintp2
# define av_mod_uintp2 av_mod_uintp2_c
#endif
#ifndef av_sat_add32
# define av_sat_add32 av_sat_add32_c
#endif
#ifndef av_sat_dadd32
# define av_sat_dadd32 av_sat_dadd32_c
#endif
#ifndef av_clipf
# define av_clipf av_clipf_c
#endif
#ifndef av_clipd
# define av_clipd av_clipd_c
#endif
#ifndef av_popcount
# define av_popcount av_popcount_c
#endif
#ifndef av_popcount64
# define av_popcount64 av_popcount64_c
#endif
#ifndef av_parity
# define av_parity av_parity_c
#endif

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/*
* Copyright (c) 2000, 2001, 2002 Fabrice Bellard
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_CPU_H
#define AVUTIL_CPU_H
#include <stddef.h>
#include "attributes.h"
#define AV_CPU_FLAG_FORCE 0x80000000 /* force usage of selected flags (OR) */
/* lower 16 bits - CPU features */
#define AV_CPU_FLAG_MMX 0x0001 ///< standard MMX
#define AV_CPU_FLAG_MMXEXT 0x0002 ///< SSE integer functions or AMD MMX ext
#define AV_CPU_FLAG_MMX2 0x0002 ///< SSE integer functions or AMD MMX ext
#define AV_CPU_FLAG_3DNOW 0x0004 ///< AMD 3DNOW
#define AV_CPU_FLAG_SSE 0x0008 ///< SSE functions
#define AV_CPU_FLAG_SSE2 0x0010 ///< PIV SSE2 functions
#define AV_CPU_FLAG_SSE2SLOW 0x40000000 ///< SSE2 supported, but usually not faster
///< than regular MMX/SSE (e.g. Core1)
#define AV_CPU_FLAG_3DNOWEXT 0x0020 ///< AMD 3DNowExt
#define AV_CPU_FLAG_SSE3 0x0040 ///< Prescott SSE3 functions
#define AV_CPU_FLAG_SSE3SLOW 0x20000000 ///< SSE3 supported, but usually not faster
///< than regular MMX/SSE (e.g. Core1)
#define AV_CPU_FLAG_SSSE3 0x0080 ///< Conroe SSSE3 functions
#define AV_CPU_FLAG_SSSE3SLOW 0x4000000 ///< SSSE3 supported, but usually not faster
#define AV_CPU_FLAG_ATOM 0x10000000 ///< Atom processor, some SSSE3 instructions are slower
#define AV_CPU_FLAG_SSE4 0x0100 ///< Penryn SSE4.1 functions
#define AV_CPU_FLAG_SSE42 0x0200 ///< Nehalem SSE4.2 functions
#define AV_CPU_FLAG_AESNI 0x80000 ///< Advanced Encryption Standard functions
#define AV_CPU_FLAG_AVX 0x4000 ///< AVX functions: requires OS support even if YMM registers aren't used
#define AV_CPU_FLAG_AVXSLOW 0x8000000 ///< AVX supported, but slow when using YMM registers (e.g. Bulldozer)
#define AV_CPU_FLAG_XOP 0x0400 ///< Bulldozer XOP functions
#define AV_CPU_FLAG_FMA4 0x0800 ///< Bulldozer FMA4 functions
#define AV_CPU_FLAG_CMOV 0x1000 ///< supports cmov instruction
#define AV_CPU_FLAG_AVX2 0x8000 ///< AVX2 functions: requires OS support even if YMM registers aren't used
#define AV_CPU_FLAG_FMA3 0x10000 ///< Haswell FMA3 functions
#define AV_CPU_FLAG_BMI1 0x20000 ///< Bit Manipulation Instruction Set 1
#define AV_CPU_FLAG_BMI2 0x40000 ///< Bit Manipulation Instruction Set 2
#define AV_CPU_FLAG_ALTIVEC 0x0001 ///< standard
#define AV_CPU_FLAG_VSX 0x0002 ///< ISA 2.06
#define AV_CPU_FLAG_POWER8 0x0004 ///< ISA 2.07
#define AV_CPU_FLAG_ARMV5TE (1 << 0)
#define AV_CPU_FLAG_ARMV6 (1 << 1)
#define AV_CPU_FLAG_ARMV6T2 (1 << 2)
#define AV_CPU_FLAG_VFP (1 << 3)
#define AV_CPU_FLAG_VFPV3 (1 << 4)
#define AV_CPU_FLAG_NEON (1 << 5)
#define AV_CPU_FLAG_ARMV8 (1 << 6)
#define AV_CPU_FLAG_VFP_VM (1 << 7) ///< VFPv2 vector mode, deprecated in ARMv7-A and unavailable in various CPUs implementations
#define AV_CPU_FLAG_SETEND (1 <<16)
/**
* Return the flags which specify extensions supported by the CPU.
* The returned value is affected by av_force_cpu_flags() if that was used
* before. So av_get_cpu_flags() can easily be used in an application to
* detect the enabled cpu flags.
*/
int av_get_cpu_flags(void);
/**
* Disables cpu detection and forces the specified flags.
* -1 is a special case that disables forcing of specific flags.
*/
void av_force_cpu_flags(int flags);
/**
* Set a mask on flags returned by av_get_cpu_flags().
* This function is mainly useful for testing.
* Please use av_force_cpu_flags() and av_get_cpu_flags() instead which are more flexible
*/
attribute_deprecated void av_set_cpu_flags_mask(int mask);
/**
* Parse CPU flags from a string.
*
* The returned flags contain the specified flags as well as related unspecified flags.
*
* This function exists only for compatibility with libav.
* Please use av_parse_cpu_caps() when possible.
* @return a combination of AV_CPU_* flags, negative on error.
*/
attribute_deprecated
int av_parse_cpu_flags(const char *s);
/**
* Parse CPU caps from a string and update the given AV_CPU_* flags based on that.
*
* @return negative on error.
*/
int av_parse_cpu_caps(unsigned *flags, const char *s);
/**
* @return the number of logical CPU cores present.
*/
int av_cpu_count(void);
/**
* Get the maximum data alignment that may be required by FFmpeg.
*
* Note that this is affected by the build configuration and the CPU flags mask,
* so e.g. if the CPU supports AVX, but libavutil has been built with
* --disable-avx or the AV_CPU_FLAG_AVX flag has been disabled through
* av_set_cpu_flags_mask(), then this function will behave as if AVX is not
* present.
*/
size_t av_cpu_max_align(void);
#endif /* AVUTIL_CPU_H */

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/*
* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* @ingroup lavu_crc32
* Public header for CRC hash function implementation.
*/
#ifndef AVUTIL_CRC_H
#define AVUTIL_CRC_H
#include <stdint.h>
#include <stddef.h>
#include "attributes.h"
#include "version.h"
/**
* @defgroup lavu_crc32 CRC
* @ingroup lavu_hash
* CRC (Cyclic Redundancy Check) hash function implementation.
*
* This module supports numerous CRC polynomials, in addition to the most
* widely used CRC-32-IEEE. See @ref AVCRCId for a list of available
* polynomials.
*
* @{
*/
typedef uint32_t AVCRC;
typedef enum {
AV_CRC_8_ATM,
AV_CRC_16_ANSI,
AV_CRC_16_CCITT,
AV_CRC_32_IEEE,
AV_CRC_32_IEEE_LE, /*< reversed bitorder version of AV_CRC_32_IEEE */
AV_CRC_16_ANSI_LE, /*< reversed bitorder version of AV_CRC_16_ANSI */
#if FF_API_CRC_BIG_TABLE
AV_CRC_24_IEEE = 12,
#else
AV_CRC_24_IEEE,
#endif /* FF_API_CRC_BIG_TABLE */
AV_CRC_MAX, /*< Not part of public API! Do not use outside libavutil. */
}AVCRCId;
/**
* Initialize a CRC table.
* @param ctx must be an array of size sizeof(AVCRC)*257 or sizeof(AVCRC)*1024
* @param le If 1, the lowest bit represents the coefficient for the highest
* exponent of the corresponding polynomial (both for poly and
* actual CRC).
* If 0, you must swap the CRC parameter and the result of av_crc
* if you need the standard representation (can be simplified in
* most cases to e.g. bswap16):
* av_bswap32(crc << (32-bits))
* @param bits number of bits for the CRC
* @param poly generator polynomial without the x**bits coefficient, in the
* representation as specified by le
* @param ctx_size size of ctx in bytes
* @return <0 on failure
*/
int av_crc_init(AVCRC *ctx, int le, int bits, uint32_t poly, int ctx_size);
/**
* Get an initialized standard CRC table.
* @param crc_id ID of a standard CRC
* @return a pointer to the CRC table or NULL on failure
*/
const AVCRC *av_crc_get_table(AVCRCId crc_id);
/**
* Calculate the CRC of a block.
* @param crc CRC of previous blocks if any or initial value for CRC
* @return CRC updated with the data from the given block
*
* @see av_crc_init() "le" parameter
*/
uint32_t av_crc(const AVCRC *ctx, uint32_t crc,
const uint8_t *buffer, size_t length) av_pure;
/**
* @}
*/
#endif /* AVUTIL_CRC_H */

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/*
* DES encryption/decryption
* Copyright (c) 2007 Reimar Doeffinger
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_DES_H
#define AVUTIL_DES_H
#include <stdint.h>
/**
* @defgroup lavu_des DES
* @ingroup lavu_crypto
* @{
*/
typedef struct AVDES {
uint64_t round_keys[3][16];
int triple_des;
} AVDES;
/**
* Allocate an AVDES context.
*/
AVDES *av_des_alloc(void);
/**
* @brief Initializes an AVDES context.
*
* @param key_bits must be 64 or 192
* @param decrypt 0 for encryption/CBC-MAC, 1 for decryption
* @return zero on success, negative value otherwise
*/
int av_des_init(struct AVDES *d, const uint8_t *key, int key_bits, int decrypt);
/**
* @brief Encrypts / decrypts using the DES algorithm.
*
* @param count number of 8 byte blocks
* @param dst destination array, can be equal to src, must be 8-byte aligned
* @param src source array, can be equal to dst, must be 8-byte aligned, may be NULL
* @param iv initialization vector for CBC mode, if NULL then ECB will be used,
* must be 8-byte aligned
* @param decrypt 0 for encryption, 1 for decryption
*/
void av_des_crypt(struct AVDES *d, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt);
/**
* @brief Calculates CBC-MAC using the DES algorithm.
*
* @param count number of 8 byte blocks
* @param dst destination array, can be equal to src, must be 8-byte aligned
* @param src source array, can be equal to dst, must be 8-byte aligned, may be NULL
*/
void av_des_mac(struct AVDES *d, uint8_t *dst, const uint8_t *src, int count);
/**
* @}
*/
#endif /* AVUTIL_DES_H */

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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* Public dictionary API.
* @deprecated
* AVDictionary is provided for compatibility with libav. It is both in
* implementation as well as API inefficient. It does not scale and is
* extremely slow with large dictionaries.
* It is recommended that new code uses our tree container from tree.c/h
* where applicable, which uses AVL trees to achieve O(log n) performance.
*/
#ifndef AVUTIL_DICT_H
#define AVUTIL_DICT_H
#include <stdint.h>
#include "version.h"
/**
* @addtogroup lavu_dict AVDictionary
* @ingroup lavu_data
*
* @brief Simple key:value store
*
* @{
* Dictionaries are used for storing key:value pairs. To create
* an AVDictionary, simply pass an address of a NULL pointer to
* av_dict_set(). NULL can be used as an empty dictionary wherever
* a pointer to an AVDictionary is required.
* Use av_dict_get() to retrieve an entry or iterate over all
* entries and finally av_dict_free() to free the dictionary
* and all its contents.
*
@code
AVDictionary *d = NULL; // "create" an empty dictionary
AVDictionaryEntry *t = NULL;
av_dict_set(&d, "foo", "bar", 0); // add an entry
char *k = av_strdup("key"); // if your strings are already allocated,
char *v = av_strdup("value"); // you can avoid copying them like this
av_dict_set(&d, k, v, AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL);
while (t = av_dict_get(d, "", t, AV_DICT_IGNORE_SUFFIX)) {
<....> // iterate over all entries in d
}
av_dict_free(&d);
@endcode
*/
#define AV_DICT_MATCH_CASE 1 /**< Only get an entry with exact-case key match. Only relevant in av_dict_get(). */
#define AV_DICT_IGNORE_SUFFIX 2 /**< Return first entry in a dictionary whose first part corresponds to the search key,
ignoring the suffix of the found key string. Only relevant in av_dict_get(). */
#define AV_DICT_DONT_STRDUP_KEY 4 /**< Take ownership of a key that's been
allocated with av_malloc() or another memory allocation function. */
#define AV_DICT_DONT_STRDUP_VAL 8 /**< Take ownership of a value that's been
allocated with av_malloc() or another memory allocation function. */
#define AV_DICT_DONT_OVERWRITE 16 ///< Don't overwrite existing entries.
#define AV_DICT_APPEND 32 /**< If the entry already exists, append to it. Note that no
delimiter is added, the strings are simply concatenated. */
#define AV_DICT_MULTIKEY 64 /**< Allow to store several equal keys in the dictionary */
typedef struct AVDictionaryEntry {
char *key;
char *value;
} AVDictionaryEntry;
typedef struct AVDictionary AVDictionary;
/**
* Get a dictionary entry with matching key.
*
* The returned entry key or value must not be changed, or it will
* cause undefined behavior.
*
* To iterate through all the dictionary entries, you can set the matching key
* to the null string "" and set the AV_DICT_IGNORE_SUFFIX flag.
*
* @param prev Set to the previous matching element to find the next.
* If set to NULL the first matching element is returned.
* @param key matching key
* @param flags a collection of AV_DICT_* flags controlling how the entry is retrieved
* @return found entry or NULL in case no matching entry was found in the dictionary
*/
AVDictionaryEntry *av_dict_get(const AVDictionary *m, const char *key,
const AVDictionaryEntry *prev, int flags);
/**
* Get number of entries in dictionary.
*
* @param m dictionary
* @return number of entries in dictionary
*/
int av_dict_count(const AVDictionary *m);
/**
* Set the given entry in *pm, overwriting an existing entry.
*
* Note: If AV_DICT_DONT_STRDUP_KEY or AV_DICT_DONT_STRDUP_VAL is set,
* these arguments will be freed on error.
*
* Warning: Adding a new entry to a dictionary invalidates all existing entries
* previously returned with av_dict_get.
*
* @param pm pointer to a pointer to a dictionary struct. If *pm is NULL
* a dictionary struct is allocated and put in *pm.
* @param key entry key to add to *pm (will either be av_strduped or added as a new key depending on flags)
* @param value entry value to add to *pm (will be av_strduped or added as a new key depending on flags).
* Passing a NULL value will cause an existing entry to be deleted.
* @return >= 0 on success otherwise an error code <0
*/
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags);
/**
* Convenience wrapper for av_dict_set that converts the value to a string
* and stores it.
*
* Note: If AV_DICT_DONT_STRDUP_KEY is set, key will be freed on error.
*/
int av_dict_set_int(AVDictionary **pm, const char *key, int64_t value, int flags);
/**
* Parse the key/value pairs list and add the parsed entries to a dictionary.
*
* In case of failure, all the successfully set entries are stored in
* *pm. You may need to manually free the created dictionary.
*
* @param key_val_sep a 0-terminated list of characters used to separate
* key from value
* @param pairs_sep a 0-terminated list of characters used to separate
* two pairs from each other
* @param flags flags to use when adding to dictionary.
* AV_DICT_DONT_STRDUP_KEY and AV_DICT_DONT_STRDUP_VAL
* are ignored since the key/value tokens will always
* be duplicated.
* @return 0 on success, negative AVERROR code on failure
*/
int av_dict_parse_string(AVDictionary **pm, const char *str,
const char *key_val_sep, const char *pairs_sep,
int flags);
/**
* Copy entries from one AVDictionary struct into another.
* @param dst pointer to a pointer to a AVDictionary struct. If *dst is NULL,
* this function will allocate a struct for you and put it in *dst
* @param src pointer to source AVDictionary struct
* @param flags flags to use when setting entries in *dst
* @note metadata is read using the AV_DICT_IGNORE_SUFFIX flag
* @return 0 on success, negative AVERROR code on failure. If dst was allocated
* by this function, callers should free the associated memory.
*/
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags);
/**
* Free all the memory allocated for an AVDictionary struct
* and all keys and values.
*/
void av_dict_free(AVDictionary **m);
/**
* Get dictionary entries as a string.
*
* Create a string containing dictionary's entries.
* Such string may be passed back to av_dict_parse_string().
* @note String is escaped with backslashes ('\').
*
* @param[in] m dictionary
* @param[out] buffer Pointer to buffer that will be allocated with string containg entries.
* Buffer must be freed by the caller when is no longer needed.
* @param[in] key_val_sep character used to separate key from value
* @param[in] pairs_sep character used to separate two pairs from each other
* @return >= 0 on success, negative on error
* @warning Separators cannot be neither '\\' nor '\0'. They also cannot be the same.
*/
int av_dict_get_string(const AVDictionary *m, char **buffer,
const char key_val_sep, const char pairs_sep);
/**
* @}
*/
#endif /* AVUTIL_DICT_H */

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/*
* Copyright (c) 2014 Vittorio Giovara <vittorio.giovara@gmail.com>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* Display matrix
*/
#ifndef AVUTIL_DISPLAY_H
#define AVUTIL_DISPLAY_H
#include <stdint.h>
#include "common.h"
/**
* @addtogroup lavu_video
* @{
*
* @defgroup lavu_video_display Display transformation matrix functions
* @{
*/
/**
* @addtogroup lavu_video_display
* The display transformation matrix specifies an affine transformation that
* should be applied to video frames for correct presentation. It is compatible
* with the matrices stored in the ISO/IEC 14496-12 container format.
*
* The data is a 3x3 matrix represented as a 9-element array:
*
* @code{.unparsed}
* | a b u |
* (a, b, u, c, d, v, x, y, w) -> | c d v |
* | x y w |
* @endcode
*
* All numbers are stored in native endianness, as 16.16 fixed-point values,
* except for u, v and w, which are stored as 2.30 fixed-point values.
*
* The transformation maps a point (p, q) in the source (pre-transformation)
* frame to the point (p', q') in the destination (post-transformation) frame as
* follows:
*
* @code{.unparsed}
* | a b u |
* (p, q, 1) . | c d v | = z * (p', q', 1)
* | x y w |
* @endcode
*
* The transformation can also be more explicitly written in components as
* follows:
*
* @code{.unparsed}
* p' = (a * p + c * q + x) / z;
* q' = (b * p + d * q + y) / z;
* z = u * p + v * q + w
* @endcode
*/
/**
* Extract the rotation component of the transformation matrix.
*
* @param matrix the transformation matrix
* @return the angle (in degrees) by which the transformation rotates the frame
* counterclockwise. The angle will be in range [-180.0, 180.0],
* or NaN if the matrix is singular.
*
* @note floating point numbers are inherently inexact, so callers are
* recommended to round the return value to nearest integer before use.
*/
double av_display_rotation_get(const int32_t matrix[9]);
/**
* Initialize a transformation matrix describing a pure counterclockwise
* rotation by the specified angle (in degrees).
*
* @param matrix an allocated transformation matrix (will be fully overwritten
* by this function)
* @param angle rotation angle in degrees.
*/
void av_display_rotation_set(int32_t matrix[9], double angle);
/**
* Flip the input matrix horizontally and/or vertically.
*
* @param matrix an allocated transformation matrix
* @param hflip whether the matrix should be flipped horizontally
* @param vflip whether the matrix should be flipped vertically
*/
void av_display_matrix_flip(int32_t matrix[9], int hflip, int vflip);
/**
* @}
* @}
*/
#endif /* AVUTIL_DISPLAY_H */

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/*
* Copyright (c) 2014 Tim Walker <tdskywalker@gmail.com>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_DOWNMIX_INFO_H
#define AVUTIL_DOWNMIX_INFO_H
#include "frame.h"
/**
* @file
* audio downmix medatata
*/
/**
* @addtogroup lavu_audio
* @{
*/
/**
* @defgroup downmix_info Audio downmix metadata
* @{
*/
/**
* Possible downmix types.
*/
enum AVDownmixType {
AV_DOWNMIX_TYPE_UNKNOWN, /**< Not indicated. */
AV_DOWNMIX_TYPE_LORO, /**< Lo/Ro 2-channel downmix (Stereo). */
AV_DOWNMIX_TYPE_LTRT, /**< Lt/Rt 2-channel downmix, Dolby Surround compatible. */
AV_DOWNMIX_TYPE_DPLII, /**< Lt/Rt 2-channel downmix, Dolby Pro Logic II compatible. */
AV_DOWNMIX_TYPE_NB /**< Number of downmix types. Not part of ABI. */
};
/**
* This structure describes optional metadata relevant to a downmix procedure.
*
* All fields are set by the decoder to the value indicated in the audio
* bitstream (if present), or to a "sane" default otherwise.
*/
typedef struct AVDownmixInfo {
/**
* Type of downmix preferred by the mastering engineer.
*/
enum AVDownmixType preferred_downmix_type;
/**
* Absolute scale factor representing the nominal level of the center
* channel during a regular downmix.
*/
double center_mix_level;
/**
* Absolute scale factor representing the nominal level of the center
* channel during an Lt/Rt compatible downmix.
*/
double center_mix_level_ltrt;
/**
* Absolute scale factor representing the nominal level of the surround
* channels during a regular downmix.
*/
double surround_mix_level;
/**
* Absolute scale factor representing the nominal level of the surround
* channels during an Lt/Rt compatible downmix.
*/
double surround_mix_level_ltrt;
/**
* Absolute scale factor representing the level at which the LFE data is
* mixed into L/R channels during downmixing.
*/
double lfe_mix_level;
} AVDownmixInfo;
/**
* Get a frame's AV_FRAME_DATA_DOWNMIX_INFO side data for editing.
*
* If the side data is absent, it is created and added to the frame.
*
* @param frame the frame for which the side data is to be obtained or created
*
* @return the AVDownmixInfo structure to be edited by the caller, or NULL if
* the structure cannot be allocated.
*/
AVDownmixInfo *av_downmix_info_update_side_data(AVFrame *frame);
/**
* @}
*/
/**
* @}
*/
#endif /* AVUTIL_DOWNMIX_INFO_H */

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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* error code definitions
*/
#ifndef AVUTIL_ERROR_H
#define AVUTIL_ERROR_H
#include <errno.h>
#include <stddef.h>
/**
* @addtogroup lavu_error
*
* @{
*/
/* error handling */
#if EDOM > 0
#define AVERROR(e) (-(e)) ///< Returns a negative error code from a POSIX error code, to return from library functions.
#define AVUNERROR(e) (-(e)) ///< Returns a POSIX error code from a library function error return value.
#else
/* Some platforms have E* and errno already negated. */
#define AVERROR(e) (e)
#define AVUNERROR(e) (e)
#endif
#define FFERRTAG(a, b, c, d) (-(int)MKTAG(a, b, c, d))
#define AVERROR_BSF_NOT_FOUND FFERRTAG(0xF8,'B','S','F') ///< Bitstream filter not found
#define AVERROR_BUG FFERRTAG( 'B','U','G','!') ///< Internal bug, also see AVERROR_BUG2
#define AVERROR_BUFFER_TOO_SMALL FFERRTAG( 'B','U','F','S') ///< Buffer too small
#define AVERROR_DECODER_NOT_FOUND FFERRTAG(0xF8,'D','E','C') ///< Decoder not found
#define AVERROR_DEMUXER_NOT_FOUND FFERRTAG(0xF8,'D','E','M') ///< Demuxer not found
#define AVERROR_ENCODER_NOT_FOUND FFERRTAG(0xF8,'E','N','C') ///< Encoder not found
#define AVERROR_EOF FFERRTAG( 'E','O','F',' ') ///< End of file
#define AVERROR_EXIT FFERRTAG( 'E','X','I','T') ///< Immediate exit was requested; the called function should not be restarted
#define AVERROR_EXTERNAL FFERRTAG( 'E','X','T',' ') ///< Generic error in an external library
#define AVERROR_FILTER_NOT_FOUND FFERRTAG(0xF8,'F','I','L') ///< Filter not found
#define AVERROR_INVALIDDATA FFERRTAG( 'I','N','D','A') ///< Invalid data found when processing input
#define AVERROR_MUXER_NOT_FOUND FFERRTAG(0xF8,'M','U','X') ///< Muxer not found
#define AVERROR_OPTION_NOT_FOUND FFERRTAG(0xF8,'O','P','T') ///< Option not found
#define AVERROR_PATCHWELCOME FFERRTAG( 'P','A','W','E') ///< Not yet implemented in FFmpeg, patches welcome
#define AVERROR_PROTOCOL_NOT_FOUND FFERRTAG(0xF8,'P','R','O') ///< Protocol not found
#define AVERROR_STREAM_NOT_FOUND FFERRTAG(0xF8,'S','T','R') ///< Stream not found
/**
* This is semantically identical to AVERROR_BUG
* it has been introduced in Libav after our AVERROR_BUG and with a modified value.
*/
#define AVERROR_BUG2 FFERRTAG( 'B','U','G',' ')
#define AVERROR_UNKNOWN FFERRTAG( 'U','N','K','N') ///< Unknown error, typically from an external library
#define AVERROR_EXPERIMENTAL (-0x2bb2afa8) ///< Requested feature is flagged experimental. Set strict_std_compliance if you really want to use it.
#define AVERROR_INPUT_CHANGED (-0x636e6701) ///< Input changed between calls. Reconfiguration is required. (can be OR-ed with AVERROR_OUTPUT_CHANGED)
#define AVERROR_OUTPUT_CHANGED (-0x636e6702) ///< Output changed between calls. Reconfiguration is required. (can be OR-ed with AVERROR_INPUT_CHANGED)
/* HTTP & RTSP errors */
#define AVERROR_HTTP_BAD_REQUEST FFERRTAG(0xF8,'4','0','0')
#define AVERROR_HTTP_UNAUTHORIZED FFERRTAG(0xF8,'4','0','1')
#define AVERROR_HTTP_FORBIDDEN FFERRTAG(0xF8,'4','0','3')
#define AVERROR_HTTP_NOT_FOUND FFERRTAG(0xF8,'4','0','4')
#define AVERROR_HTTP_OTHER_4XX FFERRTAG(0xF8,'4','X','X')
#define AVERROR_HTTP_SERVER_ERROR FFERRTAG(0xF8,'5','X','X')
#define AV_ERROR_MAX_STRING_SIZE 64
/**
* Put a description of the AVERROR code errnum in errbuf.
* In case of failure the global variable errno is set to indicate the
* error. Even in case of failure av_strerror() will print a generic
* error message indicating the errnum provided to errbuf.
*
* @param errnum error code to describe
* @param errbuf buffer to which description is written
* @param errbuf_size the size in bytes of errbuf
* @return 0 on success, a negative value if a description for errnum
* cannot be found
*/
int av_strerror(int errnum, char *errbuf, size_t errbuf_size);
/**
* Fill the provided buffer with a string containing an error string
* corresponding to the AVERROR code errnum.
*
* @param errbuf a buffer
* @param errbuf_size size in bytes of errbuf
* @param errnum error code to describe
* @return the buffer in input, filled with the error description
* @see av_strerror()
*/
static inline char *av_make_error_string(char *errbuf, size_t errbuf_size, int errnum)
{
av_strerror(errnum, errbuf, errbuf_size);
return errbuf;
}
/**
* Convenience macro, the return value should be used only directly in
* function arguments but never stand-alone.
*/
#define av_err2str(errnum) \
av_make_error_string((char[AV_ERROR_MAX_STRING_SIZE]){0}, AV_ERROR_MAX_STRING_SIZE, errnum)
/**
* @}
*/
#endif /* AVUTIL_ERROR_H */

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/*
* Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* simple arithmetic expression evaluator
*/
#ifndef AVUTIL_EVAL_H
#define AVUTIL_EVAL_H
#include "avutil.h"
typedef struct AVExpr AVExpr;
/**
* Parse and evaluate an expression.
* Note, this is significantly slower than av_expr_eval().
*
* @param res a pointer to a double where is put the result value of
* the expression, or NAN in case of error
* @param s expression as a zero terminated string, for example "1+2^3+5*5+sin(2/3)"
* @param const_names NULL terminated array of zero terminated strings of constant identifiers, for example {"PI", "E", 0}
* @param const_values a zero terminated array of values for the identifiers from const_names
* @param func1_names NULL terminated array of zero terminated strings of funcs1 identifiers
* @param funcs1 NULL terminated array of function pointers for functions which take 1 argument
* @param func2_names NULL terminated array of zero terminated strings of funcs2 identifiers
* @param funcs2 NULL terminated array of function pointers for functions which take 2 arguments
* @param opaque a pointer which will be passed to all functions from funcs1 and funcs2
* @param log_ctx parent logging context
* @return >= 0 in case of success, a negative value corresponding to an
* AVERROR code otherwise
*/
int av_expr_parse_and_eval(double *res, const char *s,
const char * const *const_names, const double *const_values,
const char * const *func1_names, double (* const *funcs1)(void *, double),
const char * const *func2_names, double (* const *funcs2)(void *, double, double),
void *opaque, int log_offset, void *log_ctx);
/**
* Parse an expression.
*
* @param expr a pointer where is put an AVExpr containing the parsed
* value in case of successful parsing, or NULL otherwise.
* The pointed to AVExpr must be freed with av_expr_free() by the user
* when it is not needed anymore.
* @param s expression as a zero terminated string, for example "1+2^3+5*5+sin(2/3)"
* @param const_names NULL terminated array of zero terminated strings of constant identifiers, for example {"PI", "E", 0}
* @param func1_names NULL terminated array of zero terminated strings of funcs1 identifiers
* @param funcs1 NULL terminated array of function pointers for functions which take 1 argument
* @param func2_names NULL terminated array of zero terminated strings of funcs2 identifiers
* @param funcs2 NULL terminated array of function pointers for functions which take 2 arguments
* @param log_ctx parent logging context
* @return >= 0 in case of success, a negative value corresponding to an
* AVERROR code otherwise
*/
int av_expr_parse(AVExpr **expr, const char *s,
const char * const *const_names,
const char * const *func1_names, double (* const *funcs1)(void *, double),
const char * const *func2_names, double (* const *funcs2)(void *, double, double),
int log_offset, void *log_ctx);
/**
* Evaluate a previously parsed expression.
*
* @param const_values a zero terminated array of values for the identifiers from av_expr_parse() const_names
* @param opaque a pointer which will be passed to all functions from funcs1 and funcs2
* @return the value of the expression
*/
double av_expr_eval(AVExpr *e, const double *const_values, void *opaque);
/**
* Free a parsed expression previously created with av_expr_parse().
*/
void av_expr_free(AVExpr *e);
/**
* Parse the string in numstr and return its value as a double. If
* the string is empty, contains only whitespaces, or does not contain
* an initial substring that has the expected syntax for a
* floating-point number, no conversion is performed. In this case,
* returns a value of zero and the value returned in tail is the value
* of numstr.
*
* @param numstr a string representing a number, may contain one of
* the International System number postfixes, for example 'K', 'M',
* 'G'. If 'i' is appended after the postfix, powers of 2 are used
* instead of powers of 10. The 'B' postfix multiplies the value by
* 8, and can be appended after another postfix or used alone. This
* allows using for example 'KB', 'MiB', 'G' and 'B' as postfix.
* @param tail if non-NULL puts here the pointer to the char next
* after the last parsed character
*/
double av_strtod(const char *numstr, char **tail);
#endif /* AVUTIL_EVAL_H */

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/* Automatically generated by version.sh, do not manually edit! */
#ifndef AVUTIL_FFVERSION_H
#define AVUTIL_FFVERSION_H
#define FFMPEG_VERSION "3.4.5"
#endif /* AVUTIL_FFVERSION_H */

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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* a very simple circular buffer FIFO implementation
*/
#ifndef AVUTIL_FIFO_H
#define AVUTIL_FIFO_H
#include <stdint.h>
#include "avutil.h"
#include "attributes.h"
typedef struct AVFifoBuffer {
uint8_t *buffer;
uint8_t *rptr, *wptr, *end;
uint32_t rndx, wndx;
} AVFifoBuffer;
/**
* Initialize an AVFifoBuffer.
* @param size of FIFO
* @return AVFifoBuffer or NULL in case of memory allocation failure
*/
AVFifoBuffer *av_fifo_alloc(unsigned int size);
/**
* Initialize an AVFifoBuffer.
* @param nmemb number of elements
* @param size size of the single element
* @return AVFifoBuffer or NULL in case of memory allocation failure
*/
AVFifoBuffer *av_fifo_alloc_array(size_t nmemb, size_t size);
/**
* Free an AVFifoBuffer.
* @param f AVFifoBuffer to free
*/
void av_fifo_free(AVFifoBuffer *f);
/**
* Free an AVFifoBuffer and reset pointer to NULL.
* @param f AVFifoBuffer to free
*/
void av_fifo_freep(AVFifoBuffer **f);
/**
* Reset the AVFifoBuffer to the state right after av_fifo_alloc, in particular it is emptied.
* @param f AVFifoBuffer to reset
*/
void av_fifo_reset(AVFifoBuffer *f);
/**
* Return the amount of data in bytes in the AVFifoBuffer, that is the
* amount of data you can read from it.
* @param f AVFifoBuffer to read from
* @return size
*/
int av_fifo_size(const AVFifoBuffer *f);
/**
* Return the amount of space in bytes in the AVFifoBuffer, that is the
* amount of data you can write into it.
* @param f AVFifoBuffer to write into
* @return size
*/
int av_fifo_space(const AVFifoBuffer *f);
/**
* Feed data at specific position from an AVFifoBuffer to a user-supplied callback.
* Similar as av_fifo_gereric_read but without discarding data.
* @param f AVFifoBuffer to read from
* @param offset offset from current read position
* @param buf_size number of bytes to read
* @param func generic read function
* @param dest data destination
*/
int av_fifo_generic_peek_at(AVFifoBuffer *f, void *dest, int offset, int buf_size, void (*func)(void*, void*, int));
/**
* Feed data from an AVFifoBuffer to a user-supplied callback.
* Similar as av_fifo_gereric_read but without discarding data.
* @param f AVFifoBuffer to read from
* @param buf_size number of bytes to read
* @param func generic read function
* @param dest data destination
*/
int av_fifo_generic_peek(AVFifoBuffer *f, void *dest, int buf_size, void (*func)(void*, void*, int));
/**
* Feed data from an AVFifoBuffer to a user-supplied callback.
* @param f AVFifoBuffer to read from
* @param buf_size number of bytes to read
* @param func generic read function
* @param dest data destination
*/
int av_fifo_generic_read(AVFifoBuffer *f, void *dest, int buf_size, void (*func)(void*, void*, int));
/**
* Feed data from a user-supplied callback to an AVFifoBuffer.
* @param f AVFifoBuffer to write to
* @param src data source; non-const since it may be used as a
* modifiable context by the function defined in func
* @param size number of bytes to write
* @param func generic write function; the first parameter is src,
* the second is dest_buf, the third is dest_buf_size.
* func must return the number of bytes written to dest_buf, or <= 0 to
* indicate no more data available to write.
* If func is NULL, src is interpreted as a simple byte array for source data.
* @return the number of bytes written to the FIFO
*/
int av_fifo_generic_write(AVFifoBuffer *f, void *src, int size, int (*func)(void*, void*, int));
/**
* Resize an AVFifoBuffer.
* In case of reallocation failure, the old FIFO is kept unchanged.
*
* @param f AVFifoBuffer to resize
* @param size new AVFifoBuffer size in bytes
* @return <0 for failure, >=0 otherwise
*/
int av_fifo_realloc2(AVFifoBuffer *f, unsigned int size);
/**
* Enlarge an AVFifoBuffer.
* In case of reallocation failure, the old FIFO is kept unchanged.
* The new fifo size may be larger than the requested size.
*
* @param f AVFifoBuffer to resize
* @param additional_space the amount of space in bytes to allocate in addition to av_fifo_size()
* @return <0 for failure, >=0 otherwise
*/
int av_fifo_grow(AVFifoBuffer *f, unsigned int additional_space);
/**
* Read and discard the specified amount of data from an AVFifoBuffer.
* @param f AVFifoBuffer to read from
* @param size amount of data to read in bytes
*/
void av_fifo_drain(AVFifoBuffer *f, int size);
/**
* Return a pointer to the data stored in a FIFO buffer at a certain offset.
* The FIFO buffer is not modified.
*
* @param f AVFifoBuffer to peek at, f must be non-NULL
* @param offs an offset in bytes, its absolute value must be less
* than the used buffer size or the returned pointer will
* point outside to the buffer data.
* The used buffer size can be checked with av_fifo_size().
*/
static inline uint8_t *av_fifo_peek2(const AVFifoBuffer *f, int offs)
{
uint8_t *ptr = f->rptr + offs;
if (ptr >= f->end)
ptr = f->buffer + (ptr - f->end);
else if (ptr < f->buffer)
ptr = f->end - (f->buffer - ptr);
return ptr;
}
#endif /* AVUTIL_FIFO_H */

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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_FILE_H
#define AVUTIL_FILE_H
#include <stdint.h>
#include "avutil.h"
/**
* @file
* Misc file utilities.
*/
/**
* Read the file with name filename, and put its content in a newly
* allocated buffer or map it with mmap() when available.
* In case of success set *bufptr to the read or mmapped buffer, and
* *size to the size in bytes of the buffer in *bufptr.
* The returned buffer must be released with av_file_unmap().
*
* @param log_offset loglevel offset used for logging
* @param log_ctx context used for logging
* @return a non negative number in case of success, a negative value
* corresponding to an AVERROR error code in case of failure
*/
av_warn_unused_result
int av_file_map(const char *filename, uint8_t **bufptr, size_t *size,
int log_offset, void *log_ctx);
/**
* Unmap or free the buffer bufptr created by av_file_map().
*
* @param size size in bytes of bufptr, must be the same as returned
* by av_file_map()
*/
void av_file_unmap(uint8_t *bufptr, size_t size);
/**
* Wrapper to work around the lack of mkstemp() on mingw.
* Also, tries to create file in /tmp first, if possible.
* *prefix can be a character constant; *filename will be allocated internally.
* @return file descriptor of opened file (or negative value corresponding to an
* AVERROR code on error)
* and opened file name in **filename.
* @note On very old libcs it is necessary to set a secure umask before
* calling this, av_tempfile() can't call umask itself as it is used in
* libraries and could interfere with the calling application.
* @deprecated as fd numbers cannot be passed saftely between libs on some platforms
*/
int av_tempfile(const char *prefix, char **filename, int log_offset, void *log_ctx);
#endif /* AVUTIL_FILE_H */

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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* @ingroup lavu_frame
* reference-counted frame API
*/
#ifndef AVUTIL_FRAME_H
#define AVUTIL_FRAME_H
#include <stddef.h>
#include <stdint.h>
#include "avutil.h"
#include "buffer.h"
#include "dict.h"
#include "rational.h"
#include "samplefmt.h"
#include "pixfmt.h"
#include "version.h"
/**
* @defgroup lavu_frame AVFrame
* @ingroup lavu_data
*
* @{
* AVFrame is an abstraction for reference-counted raw multimedia data.
*/
enum AVFrameSideDataType {
/**
* The data is the AVPanScan struct defined in libavcodec.
*/
AV_FRAME_DATA_PANSCAN,
/**
* ATSC A53 Part 4 Closed Captions.
* A53 CC bitstream is stored as uint8_t in AVFrameSideData.data.
* The number of bytes of CC data is AVFrameSideData.size.
*/
AV_FRAME_DATA_A53_CC,
/**
* Stereoscopic 3d metadata.
* The data is the AVStereo3D struct defined in libavutil/stereo3d.h.
*/
AV_FRAME_DATA_STEREO3D,
/**
* The data is the AVMatrixEncoding enum defined in libavutil/channel_layout.h.
*/
AV_FRAME_DATA_MATRIXENCODING,
/**
* Metadata relevant to a downmix procedure.
* The data is the AVDownmixInfo struct defined in libavutil/downmix_info.h.
*/
AV_FRAME_DATA_DOWNMIX_INFO,
/**
* ReplayGain information in the form of the AVReplayGain struct.
*/
AV_FRAME_DATA_REPLAYGAIN,
/**
* This side data contains a 3x3 transformation matrix describing an affine
* transformation that needs to be applied to the frame for correct
* presentation.
*
* See libavutil/display.h for a detailed description of the data.
*/
AV_FRAME_DATA_DISPLAYMATRIX,
/**
* Active Format Description data consisting of a single byte as specified
* in ETSI TS 101 154 using AVActiveFormatDescription enum.
*/
AV_FRAME_DATA_AFD,
/**
* Motion vectors exported by some codecs (on demand through the export_mvs
* flag set in the libavcodec AVCodecContext flags2 option).
* The data is the AVMotionVector struct defined in
* libavutil/motion_vector.h.
*/
AV_FRAME_DATA_MOTION_VECTORS,
/**
* Recommmends skipping the specified number of samples. This is exported
* only if the "skip_manual" AVOption is set in libavcodec.
* This has the same format as AV_PKT_DATA_SKIP_SAMPLES.
* @code
* u32le number of samples to skip from start of this packet
* u32le number of samples to skip from end of this packet
* u8 reason for start skip
* u8 reason for end skip (0=padding silence, 1=convergence)
* @endcode
*/
AV_FRAME_DATA_SKIP_SAMPLES,
/**
* This side data must be associated with an audio frame and corresponds to
* enum AVAudioServiceType defined in avcodec.h.
*/
AV_FRAME_DATA_AUDIO_SERVICE_TYPE,
/**
* Mastering display metadata associated with a video frame. The payload is
* an AVMasteringDisplayMetadata type and contains information about the
* mastering display color volume.
*/
AV_FRAME_DATA_MASTERING_DISPLAY_METADATA,
/**
* The GOP timecode in 25 bit timecode format. Data format is 64-bit integer.
* This is set on the first frame of a GOP that has a temporal reference of 0.
*/
AV_FRAME_DATA_GOP_TIMECODE,
/**
* The data represents the AVSphericalMapping structure defined in
* libavutil/spherical.h.
*/
AV_FRAME_DATA_SPHERICAL,
/**
* Content light level (based on CTA-861.3). This payload contains data in
* the form of the AVContentLightMetadata struct.
*/
AV_FRAME_DATA_CONTENT_LIGHT_LEVEL,
/**
* The data contains an ICC profile as an opaque octet buffer following the
* format described by ISO 15076-1 with an optional name defined in the
* metadata key entry "name".
*/
AV_FRAME_DATA_ICC_PROFILE,
};
enum AVActiveFormatDescription {
AV_AFD_SAME = 8,
AV_AFD_4_3 = 9,
AV_AFD_16_9 = 10,
AV_AFD_14_9 = 11,
AV_AFD_4_3_SP_14_9 = 13,
AV_AFD_16_9_SP_14_9 = 14,
AV_AFD_SP_4_3 = 15,
};
/**
* Structure to hold side data for an AVFrame.
*
* sizeof(AVFrameSideData) is not a part of the public ABI, so new fields may be added
* to the end with a minor bump.
*/
typedef struct AVFrameSideData {
enum AVFrameSideDataType type;
uint8_t *data;
int size;
AVDictionary *metadata;
AVBufferRef *buf;
} AVFrameSideData;
/**
* This structure describes decoded (raw) audio or video data.
*
* AVFrame must be allocated using av_frame_alloc(). Note that this only
* allocates the AVFrame itself, the buffers for the data must be managed
* through other means (see below).
* AVFrame must be freed with av_frame_free().
*
* AVFrame is typically allocated once and then reused multiple times to hold
* different data (e.g. a single AVFrame to hold frames received from a
* decoder). In such a case, av_frame_unref() will free any references held by
* the frame and reset it to its original clean state before it
* is reused again.
*
* The data described by an AVFrame is usually reference counted through the
* AVBuffer API. The underlying buffer references are stored in AVFrame.buf /
* AVFrame.extended_buf. An AVFrame is considered to be reference counted if at
* least one reference is set, i.e. if AVFrame.buf[0] != NULL. In such a case,
* every single data plane must be contained in one of the buffers in
* AVFrame.buf or AVFrame.extended_buf.
* There may be a single buffer for all the data, or one separate buffer for
* each plane, or anything in between.
*
* sizeof(AVFrame) is not a part of the public ABI, so new fields may be added
* to the end with a minor bump.
*
* Fields can be accessed through AVOptions, the name string used, matches the
* C structure field name for fields accessible through AVOptions. The AVClass
* for AVFrame can be obtained from avcodec_get_frame_class()
*/
typedef struct AVFrame {
#define AV_NUM_DATA_POINTERS 8
/**
* pointer to the picture/channel planes.
* This might be different from the first allocated byte
*
* Some decoders access areas outside 0,0 - width,height, please
* see avcodec_align_dimensions2(). Some filters and swscale can read
* up to 16 bytes beyond the planes, if these filters are to be used,
* then 16 extra bytes must be allocated.
*
* NOTE: Except for hwaccel formats, pointers not needed by the format
* MUST be set to NULL.
*/
uint8_t *data[AV_NUM_DATA_POINTERS];
/**
* For video, size in bytes of each picture line.
* For audio, size in bytes of each plane.
*
* For audio, only linesize[0] may be set. For planar audio, each channel
* plane must be the same size.
*
* For video the linesizes should be multiples of the CPUs alignment
* preference, this is 16 or 32 for modern desktop CPUs.
* Some code requires such alignment other code can be slower without
* correct alignment, for yet other it makes no difference.
*
* @note The linesize may be larger than the size of usable data -- there
* may be extra padding present for performance reasons.
*/
int linesize[AV_NUM_DATA_POINTERS];
/**
* pointers to the data planes/channels.
*
* For video, this should simply point to data[].
*
* For planar audio, each channel has a separate data pointer, and
* linesize[0] contains the size of each channel buffer.
* For packed audio, there is just one data pointer, and linesize[0]
* contains the total size of the buffer for all channels.
*
* Note: Both data and extended_data should always be set in a valid frame,
* but for planar audio with more channels that can fit in data,
* extended_data must be used in order to access all channels.
*/
uint8_t **extended_data;
/**
* @name Video dimensions
* Video frames only. The coded dimensions (in pixels) of the video frame,
* i.e. the size of the rectangle that contains some well-defined values.
*
* @note The part of the frame intended for display/presentation is further
* restricted by the @ref cropping "Cropping rectangle".
* @{
*/
int width, height;
/**
* @}
*/
/**
* number of audio samples (per channel) described by this frame
*/
int nb_samples;
/**
* format of the frame, -1 if unknown or unset
* Values correspond to enum AVPixelFormat for video frames,
* enum AVSampleFormat for audio)
*/
int format;
/**
* 1 -> keyframe, 0-> not
*/
int key_frame;
/**
* Picture type of the frame.
*/
enum AVPictureType pict_type;
/**
* Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
*/
AVRational sample_aspect_ratio;
/**
* Presentation timestamp in time_base units (time when frame should be shown to user).
*/
int64_t pts;
#if FF_API_PKT_PTS
/**
* PTS copied from the AVPacket that was decoded to produce this frame.
* @deprecated use the pts field instead
*/
attribute_deprecated
int64_t pkt_pts;
#endif
/**
* DTS copied from the AVPacket that triggered returning this frame. (if frame threading isn't used)
* This is also the Presentation time of this AVFrame calculated from
* only AVPacket.dts values without pts values.
*/
int64_t pkt_dts;
/**
* picture number in bitstream order
*/
int coded_picture_number;
/**
* picture number in display order
*/
int display_picture_number;
/**
* quality (between 1 (good) and FF_LAMBDA_MAX (bad))
*/
int quality;
/**
* for some private data of the user
*/
void *opaque;
#if FF_API_ERROR_FRAME
/**
* @deprecated unused
*/
attribute_deprecated
uint64_t error[AV_NUM_DATA_POINTERS];
#endif
/**
* When decoding, this signals how much the picture must be delayed.
* extra_delay = repeat_pict / (2*fps)
*/
int repeat_pict;
/**
* The content of the picture is interlaced.
*/
int interlaced_frame;
/**
* If the content is interlaced, is top field displayed first.
*/
int top_field_first;
/**
* Tell user application that palette has changed from previous frame.
*/
int palette_has_changed;
/**
* reordered opaque 64 bits (generally an integer or a double precision float
* PTS but can be anything).
* The user sets AVCodecContext.reordered_opaque to represent the input at
* that time,
* the decoder reorders values as needed and sets AVFrame.reordered_opaque
* to exactly one of the values provided by the user through AVCodecContext.reordered_opaque
* @deprecated in favor of pkt_pts
*/
int64_t reordered_opaque;
/**
* Sample rate of the audio data.
*/
int sample_rate;
/**
* Channel layout of the audio data.
*/
uint64_t channel_layout;
/**
* AVBuffer references backing the data for this frame. If all elements of
* this array are NULL, then this frame is not reference counted. This array
* must be filled contiguously -- if buf[i] is non-NULL then buf[j] must
* also be non-NULL for all j < i.
*
* There may be at most one AVBuffer per data plane, so for video this array
* always contains all the references. For planar audio with more than
* AV_NUM_DATA_POINTERS channels, there may be more buffers than can fit in
* this array. Then the extra AVBufferRef pointers are stored in the
* extended_buf array.
*/
AVBufferRef *buf[AV_NUM_DATA_POINTERS];
/**
* For planar audio which requires more than AV_NUM_DATA_POINTERS
* AVBufferRef pointers, this array will hold all the references which
* cannot fit into AVFrame.buf.
*
* Note that this is different from AVFrame.extended_data, which always
* contains all the pointers. This array only contains the extra pointers,
* which cannot fit into AVFrame.buf.
*
* This array is always allocated using av_malloc() by whoever constructs
* the frame. It is freed in av_frame_unref().
*/
AVBufferRef **extended_buf;
/**
* Number of elements in extended_buf.
*/
int nb_extended_buf;
AVFrameSideData **side_data;
int nb_side_data;
/**
* @defgroup lavu_frame_flags AV_FRAME_FLAGS
* @ingroup lavu_frame
* Flags describing additional frame properties.
*
* @{
*/
/**
* The frame data may be corrupted, e.g. due to decoding errors.
*/
#define AV_FRAME_FLAG_CORRUPT (1 << 0)
/**
* A flag to mark the frames which need to be decoded, but shouldn't be output.
*/
#define AV_FRAME_FLAG_DISCARD (1 << 2)
/**
* @}
*/
/**
* Frame flags, a combination of @ref lavu_frame_flags
*/
int flags;
/**
* MPEG vs JPEG YUV range.
* - encoding: Set by user
* - decoding: Set by libavcodec
*/
enum AVColorRange color_range;
enum AVColorPrimaries color_primaries;
enum AVColorTransferCharacteristic color_trc;
/**
* YUV colorspace type.
* - encoding: Set by user
* - decoding: Set by libavcodec
*/
enum AVColorSpace colorspace;
enum AVChromaLocation chroma_location;
/**
* frame timestamp estimated using various heuristics, in stream time base
* - encoding: unused
* - decoding: set by libavcodec, read by user.
*/
int64_t best_effort_timestamp;
/**
* reordered pos from the last AVPacket that has been input into the decoder
* - encoding: unused
* - decoding: Read by user.
*/
int64_t pkt_pos;
/**
* duration of the corresponding packet, expressed in
* AVStream->time_base units, 0 if unknown.
* - encoding: unused
* - decoding: Read by user.
*/
int64_t pkt_duration;
/**
* metadata.
* - encoding: Set by user.
* - decoding: Set by libavcodec.
*/
AVDictionary *metadata;
/**
* decode error flags of the frame, set to a combination of
* FF_DECODE_ERROR_xxx flags if the decoder produced a frame, but there
* were errors during the decoding.
* - encoding: unused
* - decoding: set by libavcodec, read by user.
*/
int decode_error_flags;
#define FF_DECODE_ERROR_INVALID_BITSTREAM 1
#define FF_DECODE_ERROR_MISSING_REFERENCE 2
/**
* number of audio channels, only used for audio.
* - encoding: unused
* - decoding: Read by user.
*/
int channels;
/**
* size of the corresponding packet containing the compressed
* frame.
* It is set to a negative value if unknown.
* - encoding: unused
* - decoding: set by libavcodec, read by user.
*/
int pkt_size;
#if FF_API_FRAME_QP
/**
* QP table
*/
attribute_deprecated
int8_t *qscale_table;
/**
* QP store stride
*/
attribute_deprecated
int qstride;
attribute_deprecated
int qscale_type;
AVBufferRef *qp_table_buf;
#endif
/**
* For hwaccel-format frames, this should be a reference to the
* AVHWFramesContext describing the frame.
*/
AVBufferRef *hw_frames_ctx;
/**
* AVBufferRef for free use by the API user. FFmpeg will never check the
* contents of the buffer ref. FFmpeg calls av_buffer_unref() on it when
* the frame is unreferenced. av_frame_copy_props() calls create a new
* reference with av_buffer_ref() for the target frame's opaque_ref field.
*
* This is unrelated to the opaque field, although it serves a similar
* purpose.
*/
AVBufferRef *opaque_ref;
/**
* @anchor cropping
* @name Cropping
* Video frames only. The number of pixels to discard from the the
* top/bottom/left/right border of the frame to obtain the sub-rectangle of
* the frame intended for presentation.
* @{
*/
size_t crop_top;
size_t crop_bottom;
size_t crop_left;
size_t crop_right;
/**
* @}
*/
} AVFrame;
/**
* Accessors for some AVFrame fields. These used to be provided for ABI
* compatibility, and do not need to be used anymore.
*/
int64_t av_frame_get_best_effort_timestamp(const AVFrame *frame);
void av_frame_set_best_effort_timestamp(AVFrame *frame, int64_t val);
int64_t av_frame_get_pkt_duration (const AVFrame *frame);
void av_frame_set_pkt_duration (AVFrame *frame, int64_t val);
int64_t av_frame_get_pkt_pos (const AVFrame *frame);
void av_frame_set_pkt_pos (AVFrame *frame, int64_t val);
int64_t av_frame_get_channel_layout (const AVFrame *frame);
void av_frame_set_channel_layout (AVFrame *frame, int64_t val);
int av_frame_get_channels (const AVFrame *frame);
void av_frame_set_channels (AVFrame *frame, int val);
int av_frame_get_sample_rate (const AVFrame *frame);
void av_frame_set_sample_rate (AVFrame *frame, int val);
AVDictionary *av_frame_get_metadata (const AVFrame *frame);
void av_frame_set_metadata (AVFrame *frame, AVDictionary *val);
int av_frame_get_decode_error_flags (const AVFrame *frame);
void av_frame_set_decode_error_flags (AVFrame *frame, int val);
int av_frame_get_pkt_size(const AVFrame *frame);
void av_frame_set_pkt_size(AVFrame *frame, int val);
AVDictionary **avpriv_frame_get_metadatap(AVFrame *frame);
#if FF_API_FRAME_QP
int8_t *av_frame_get_qp_table(AVFrame *f, int *stride, int *type);
int av_frame_set_qp_table(AVFrame *f, AVBufferRef *buf, int stride, int type);
#endif
enum AVColorSpace av_frame_get_colorspace(const AVFrame *frame);
void av_frame_set_colorspace(AVFrame *frame, enum AVColorSpace val);
enum AVColorRange av_frame_get_color_range(const AVFrame *frame);
void av_frame_set_color_range(AVFrame *frame, enum AVColorRange val);
/**
* Get the name of a colorspace.
* @return a static string identifying the colorspace; can be NULL.
*/
const char *av_get_colorspace_name(enum AVColorSpace val);
/**
* Allocate an AVFrame and set its fields to default values. The resulting
* struct must be freed using av_frame_free().
*
* @return An AVFrame filled with default values or NULL on failure.
*
* @note this only allocates the AVFrame itself, not the data buffers. Those
* must be allocated through other means, e.g. with av_frame_get_buffer() or
* manually.
*/
AVFrame *av_frame_alloc(void);
/**
* Free the frame and any dynamically allocated objects in it,
* e.g. extended_data. If the frame is reference counted, it will be
* unreferenced first.
*
* @param frame frame to be freed. The pointer will be set to NULL.
*/
void av_frame_free(AVFrame **frame);
/**
* Set up a new reference to the data described by the source frame.
*
* Copy frame properties from src to dst and create a new reference for each
* AVBufferRef from src.
*
* If src is not reference counted, new buffers are allocated and the data is
* copied.
*
* @warning: dst MUST have been either unreferenced with av_frame_unref(dst),
* or newly allocated with av_frame_alloc() before calling this
* function, or undefined behavior will occur.
*
* @return 0 on success, a negative AVERROR on error
*/
int av_frame_ref(AVFrame *dst, const AVFrame *src);
/**
* Create a new frame that references the same data as src.
*
* This is a shortcut for av_frame_alloc()+av_frame_ref().
*
* @return newly created AVFrame on success, NULL on error.
*/
AVFrame *av_frame_clone(const AVFrame *src);
/**
* Unreference all the buffers referenced by frame and reset the frame fields.
*/
void av_frame_unref(AVFrame *frame);
/**
* Move everything contained in src to dst and reset src.
*
* @warning: dst is not unreferenced, but directly overwritten without reading
* or deallocating its contents. Call av_frame_unref(dst) manually
* before calling this function to ensure that no memory is leaked.
*/
void av_frame_move_ref(AVFrame *dst, AVFrame *src);
/**
* Allocate new buffer(s) for audio or video data.
*
* The following fields must be set on frame before calling this function:
* - format (pixel format for video, sample format for audio)
* - width and height for video
* - nb_samples and channel_layout for audio
*
* This function will fill AVFrame.data and AVFrame.buf arrays and, if
* necessary, allocate and fill AVFrame.extended_data and AVFrame.extended_buf.
* For planar formats, one buffer will be allocated for each plane.
*
* @warning: if frame already has been allocated, calling this function will
* leak memory. In addition, undefined behavior can occur in certain
* cases.
*
* @param frame frame in which to store the new buffers.
* @param align Required buffer size alignment. If equal to 0, alignment will be
* chosen automatically for the current CPU. It is highly
* recommended to pass 0 here unless you know what you are doing.
*
* @return 0 on success, a negative AVERROR on error.
*/
int av_frame_get_buffer(AVFrame *frame, int align);
/**
* Check if the frame data is writable.
*
* @return A positive value if the frame data is writable (which is true if and
* only if each of the underlying buffers has only one reference, namely the one
* stored in this frame). Return 0 otherwise.
*
* If 1 is returned the answer is valid until av_buffer_ref() is called on any
* of the underlying AVBufferRefs (e.g. through av_frame_ref() or directly).
*
* @see av_frame_make_writable(), av_buffer_is_writable()
*/
int av_frame_is_writable(AVFrame *frame);
/**
* Ensure that the frame data is writable, avoiding data copy if possible.
*
* Do nothing if the frame is writable, allocate new buffers and copy the data
* if it is not.
*
* @return 0 on success, a negative AVERROR on error.
*
* @see av_frame_is_writable(), av_buffer_is_writable(),
* av_buffer_make_writable()
*/
int av_frame_make_writable(AVFrame *frame);
/**
* Copy the frame data from src to dst.
*
* This function does not allocate anything, dst must be already initialized and
* allocated with the same parameters as src.
*
* This function only copies the frame data (i.e. the contents of the data /
* extended data arrays), not any other properties.
*
* @return >= 0 on success, a negative AVERROR on error.
*/
int av_frame_copy(AVFrame *dst, const AVFrame *src);
/**
* Copy only "metadata" fields from src to dst.
*
* Metadata for the purpose of this function are those fields that do not affect
* the data layout in the buffers. E.g. pts, sample rate (for audio) or sample
* aspect ratio (for video), but not width/height or channel layout.
* Side data is also copied.
*/
int av_frame_copy_props(AVFrame *dst, const AVFrame *src);
/**
* Get the buffer reference a given data plane is stored in.
*
* @param plane index of the data plane of interest in frame->extended_data.
*
* @return the buffer reference that contains the plane or NULL if the input
* frame is not valid.
*/
AVBufferRef *av_frame_get_plane_buffer(AVFrame *frame, int plane);
/**
* Add a new side data to a frame.
*
* @param frame a frame to which the side data should be added
* @param type type of the added side data
* @param size size of the side data
*
* @return newly added side data on success, NULL on error
*/
AVFrameSideData *av_frame_new_side_data(AVFrame *frame,
enum AVFrameSideDataType type,
int size);
/**
* @return a pointer to the side data of a given type on success, NULL if there
* is no side data with such type in this frame.
*/
AVFrameSideData *av_frame_get_side_data(const AVFrame *frame,
enum AVFrameSideDataType type);
/**
* If side data of the supplied type exists in the frame, free it and remove it
* from the frame.
*/
void av_frame_remove_side_data(AVFrame *frame, enum AVFrameSideDataType type);
/**
* Flags for frame cropping.
*/
enum {
/**
* Apply the maximum possible cropping, even if it requires setting the
* AVFrame.data[] entries to unaligned pointers. Passing unaligned data
* to FFmpeg API is generally not allowed, and causes undefined behavior
* (such as crashes). You can pass unaligned data only to FFmpeg APIs that
* are explicitly documented to accept it. Use this flag only if you
* absolutely know what you are doing.
*/
AV_FRAME_CROP_UNALIGNED = 1 << 0,
};
/**
* Crop the given video AVFrame according to its crop_left/crop_top/crop_right/
* crop_bottom fields. If cropping is successful, the function will adjust the
* data pointers and the width/height fields, and set the crop fields to 0.
*
* In all cases, the cropping boundaries will be rounded to the inherent
* alignment of the pixel format. In some cases, such as for opaque hwaccel
* formats, the left/top cropping is ignored. The crop fields are set to 0 even
* if the cropping was rounded or ignored.
*
* @param frame the frame which should be cropped
* @param flags Some combination of AV_FRAME_CROP_* flags, or 0.
*
* @return >= 0 on success, a negative AVERROR on error. If the cropping fields
* were invalid, AVERROR(ERANGE) is returned, and nothing is changed.
*/
int av_frame_apply_cropping(AVFrame *frame, int flags);
/**
* @return a string identifying the side data type
*/
const char *av_frame_side_data_name(enum AVFrameSideDataType type);
/**
* @}
*/
#endif /* AVUTIL_FRAME_H */

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/*
* Copyright (C) 2013 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* @ingroup lavu_hash_generic
* Generic hashing API
*/
#ifndef AVUTIL_HASH_H
#define AVUTIL_HASH_H
#include <stdint.h>
/**
* @defgroup lavu_hash Hash Functions
* @ingroup lavu_crypto
* Hash functions useful in multimedia.
*
* Hash functions are widely used in multimedia, from error checking and
* concealment to internal regression testing. libavutil has efficient
* implementations of a variety of hash functions that may be useful for
* FFmpeg and other multimedia applications.
*
* @{
*
* @defgroup lavu_hash_generic Generic Hashing API
* An abstraction layer for all hash functions supported by libavutil.
*
* If your application needs to support a wide range of different hash
* functions, then the Generic Hashing API is for you. It provides a generic,
* reusable API for @ref lavu_hash "all hash functions" implemented in libavutil.
* If you just need to use one particular hash function, use the @ref lavu_hash
* "individual hash" directly.
*
* @section Sample Code
*
* A basic template for using the Generic Hashing API follows:
*
* @code
* struct AVHashContext *ctx = NULL;
* const char *hash_name = NULL;
* uint8_t *output_buf = NULL;
*
* // Select from a string returned by av_hash_names()
* hash_name = ...;
*
* // Allocate a hash context
* ret = av_hash_alloc(&ctx, hash_name);
* if (ret < 0)
* return ret;
*
* // Initialize the hash context
* av_hash_init(ctx);
*
* // Update the hash context with data
* while (data_left) {
* av_hash_update(ctx, data, size);
* }
*
* // Now we have no more data, so it is time to finalize the hash and get the
* // output. But we need to first allocate an output buffer. Note that you can
* // use any memory allocation function, including malloc(), not just
* // av_malloc().
* output_buf = av_malloc(av_hash_get_size(ctx));
* if (!output_buf)
* return AVERROR(ENOMEM);
*
* // Finalize the hash context.
* // You can use any of the av_hash_final*() functions provided, for other
* // output formats. If you do so, be sure to adjust the memory allocation
* // above. See the function documentation below for the exact amount of extra
* // memory needed.
* av_hash_final(ctx, output_buffer);
*
* // Free the context
* av_hash_freep(&ctx);
* @endcode
*
* @section Hash Function-Specific Information
* If the CRC32 hash is selected, the #AV_CRC_32_IEEE polynomial will be
* used.
*
* If the Murmur3 hash is selected, the default seed will be used. See @ref
* lavu_murmur3_seedinfo "Murmur3" for more information.
*
* @{
*/
/**
* @example ffhash.c
* This example is a simple command line application that takes one or more
* arguments. It demonstrates a typical use of the hashing API with allocation,
* initialization, updating, and finalizing.
*/
struct AVHashContext;
/**
* Allocate a hash context for the algorithm specified by name.
*
* @return >= 0 for success, a negative error code for failure
*
* @note The context is not initialized after a call to this function; you must
* call av_hash_init() to do so.
*/
int av_hash_alloc(struct AVHashContext **ctx, const char *name);
/**
* Get the names of available hash algorithms.
*
* This function can be used to enumerate the algorithms.
*
* @param[in] i Index of the hash algorithm, starting from 0
* @return Pointer to a static string or `NULL` if `i` is out of range
*/
const char *av_hash_names(int i);
/**
* Get the name of the algorithm corresponding to the given hash context.
*/
const char *av_hash_get_name(const struct AVHashContext *ctx);
/**
* Maximum value that av_hash_get_size() will currently return.
*
* You can use this if you absolutely want or need to use static allocation for
* the output buffer and are fine with not supporting hashes newly added to
* libavutil without recompilation.
*
* @warning
* Adding new hashes with larger sizes, and increasing the macro while doing
* so, will not be considered an ABI change. To prevent your code from
* overflowing a buffer, either dynamically allocate the output buffer with
* av_hash_get_size(), or limit your use of the Hashing API to hashes that are
* already in FFmpeg during the time of compilation.
*/
#define AV_HASH_MAX_SIZE 64
/**
* Get the size of the resulting hash value in bytes.
*
* The maximum value this function will currently return is available as macro
* #AV_HASH_MAX_SIZE.
*
* @param[in] ctx Hash context
* @return Size of the hash value in bytes
*/
int av_hash_get_size(const struct AVHashContext *ctx);
/**
* Initialize or reset a hash context.
*
* @param[in,out] ctx Hash context
*/
void av_hash_init(struct AVHashContext *ctx);
/**
* Update a hash context with additional data.
*
* @param[in,out] ctx Hash context
* @param[in] src Data to be added to the hash context
* @param[in] len Size of the additional data
*/
void av_hash_update(struct AVHashContext *ctx, const uint8_t *src, int len);
/**
* Finalize a hash context and compute the actual hash value.
*
* The minimum size of `dst` buffer is given by av_hash_get_size() or
* #AV_HASH_MAX_SIZE. The use of the latter macro is discouraged.
*
* It is not safe to update or finalize a hash context again, if it has already
* been finalized.
*
* @param[in,out] ctx Hash context
* @param[out] dst Where the final hash value will be stored
*
* @see av_hash_final_bin() provides an alternative API
*/
void av_hash_final(struct AVHashContext *ctx, uint8_t *dst);
/**
* Finalize a hash context and store the actual hash value in a buffer.
*
* It is not safe to update or finalize a hash context again, if it has already
* been finalized.
*
* If `size` is smaller than the hash size (given by av_hash_get_size()), the
* hash is truncated; if size is larger, the buffer is padded with 0.
*
* @param[in,out] ctx Hash context
* @param[out] dst Where the final hash value will be stored
* @param[in] size Number of bytes to write to `dst`
*/
void av_hash_final_bin(struct AVHashContext *ctx, uint8_t *dst, int size);
/**
* Finalize a hash context and store the hexadecimal representation of the
* actual hash value as a string.
*
* It is not safe to update or finalize a hash context again, if it has already
* been finalized.
*
* The string is always 0-terminated.
*
* If `size` is smaller than `2 * hash_size + 1`, where `hash_size` is the
* value returned by av_hash_get_size(), the string will be truncated.
*
* @param[in,out] ctx Hash context
* @param[out] dst Where the string will be stored
* @param[in] size Maximum number of bytes to write to `dst`
*/
void av_hash_final_hex(struct AVHashContext *ctx, uint8_t *dst, int size);
/**
* Finalize a hash context and store the Base64 representation of the
* actual hash value as a string.
*
* It is not safe to update or finalize a hash context again, if it has already
* been finalized.
*
* The string is always 0-terminated.
*
* If `size` is smaller than AV_BASE64_SIZE(hash_size), where `hash_size` is
* the value returned by av_hash_get_size(), the string will be truncated.
*
* @param[in,out] ctx Hash context
* @param[out] dst Where the final hash value will be stored
* @param[in] size Maximum number of bytes to write to `dst`
*/
void av_hash_final_b64(struct AVHashContext *ctx, uint8_t *dst, int size);
/**
* Free hash context and set hash context pointer to `NULL`.
*
* @param[in,out] ctx Pointer to hash context
*/
void av_hash_freep(struct AVHashContext **ctx);
/**
* @}
* @}
*/
#endif /* AVUTIL_HASH_H */

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/*
* Copyright (C) 2012 Martin Storsjo
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_HMAC_H
#define AVUTIL_HMAC_H
#include <stdint.h>
#include "version.h"
/**
* @defgroup lavu_hmac HMAC
* @ingroup lavu_crypto
* @{
*/
enum AVHMACType {
AV_HMAC_MD5,
AV_HMAC_SHA1,
AV_HMAC_SHA224,
AV_HMAC_SHA256,
AV_HMAC_SHA384 = 12,
AV_HMAC_SHA512,
};
typedef struct AVHMAC AVHMAC;
/**
* Allocate an AVHMAC context.
* @param type The hash function used for the HMAC.
*/
AVHMAC *av_hmac_alloc(enum AVHMACType type);
/**
* Free an AVHMAC context.
* @param ctx The context to free, may be NULL
*/
void av_hmac_free(AVHMAC *ctx);
/**
* Initialize an AVHMAC context with an authentication key.
* @param ctx The HMAC context
* @param key The authentication key
* @param keylen The length of the key, in bytes
*/
void av_hmac_init(AVHMAC *ctx, const uint8_t *key, unsigned int keylen);
/**
* Hash data with the HMAC.
* @param ctx The HMAC context
* @param data The data to hash
* @param len The length of the data, in bytes
*/
void av_hmac_update(AVHMAC *ctx, const uint8_t *data, unsigned int len);
/**
* Finish hashing and output the HMAC digest.
* @param ctx The HMAC context
* @param out The output buffer to write the digest into
* @param outlen The length of the out buffer, in bytes
* @return The number of bytes written to out, or a negative error code.
*/
int av_hmac_final(AVHMAC *ctx, uint8_t *out, unsigned int outlen);
/**
* Hash an array of data with a key.
* @param ctx The HMAC context
* @param data The data to hash
* @param len The length of the data, in bytes
* @param key The authentication key
* @param keylen The length of the key, in bytes
* @param out The output buffer to write the digest into
* @param outlen The length of the out buffer, in bytes
* @return The number of bytes written to out, or a negative error code.
*/
int av_hmac_calc(AVHMAC *ctx, const uint8_t *data, unsigned int len,
const uint8_t *key, unsigned int keylen,
uint8_t *out, unsigned int outlen);
/**
* @}
*/
#endif /* AVUTIL_HMAC_H */

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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_HWCONTEXT_H
#define AVUTIL_HWCONTEXT_H
#include "buffer.h"
#include "frame.h"
#include "log.h"
#include "pixfmt.h"
enum AVHWDeviceType {
AV_HWDEVICE_TYPE_VDPAU,
AV_HWDEVICE_TYPE_CUDA,
AV_HWDEVICE_TYPE_VAAPI,
AV_HWDEVICE_TYPE_DXVA2,
AV_HWDEVICE_TYPE_QSV,
AV_HWDEVICE_TYPE_VIDEOTOOLBOX,
AV_HWDEVICE_TYPE_NONE,
AV_HWDEVICE_TYPE_D3D11VA,
AV_HWDEVICE_TYPE_DRM,
};
typedef struct AVHWDeviceInternal AVHWDeviceInternal;
/**
* This struct aggregates all the (hardware/vendor-specific) "high-level" state,
* i.e. state that is not tied to a concrete processing configuration.
* E.g., in an API that supports hardware-accelerated encoding and decoding,
* this struct will (if possible) wrap the state that is common to both encoding
* and decoding and from which specific instances of encoders or decoders can be
* derived.
*
* This struct is reference-counted with the AVBuffer mechanism. The
* av_hwdevice_ctx_alloc() constructor yields a reference, whose data field
* points to the actual AVHWDeviceContext. Further objects derived from
* AVHWDeviceContext (such as AVHWFramesContext, describing a frame pool with
* specific properties) will hold an internal reference to it. After all the
* references are released, the AVHWDeviceContext itself will be freed,
* optionally invoking a user-specified callback for uninitializing the hardware
* state.
*/
typedef struct AVHWDeviceContext {
/**
* A class for logging. Set by av_hwdevice_ctx_alloc().
*/
const AVClass *av_class;
/**
* Private data used internally by libavutil. Must not be accessed in any
* way by the caller.
*/
AVHWDeviceInternal *internal;
/**
* This field identifies the underlying API used for hardware access.
*
* This field is set when this struct is allocated and never changed
* afterwards.
*/
enum AVHWDeviceType type;
/**
* The format-specific data, allocated and freed by libavutil along with
* this context.
*
* Should be cast by the user to the format-specific context defined in the
* corresponding header (hwcontext_*.h) and filled as described in the
* documentation before calling av_hwdevice_ctx_init().
*
* After calling av_hwdevice_ctx_init() this struct should not be modified
* by the caller.
*/
void *hwctx;
/**
* This field may be set by the caller before calling av_hwdevice_ctx_init().
*
* If non-NULL, this callback will be called when the last reference to
* this context is unreferenced, immediately before it is freed.
*
* @note when other objects (e.g an AVHWFramesContext) are derived from this
* struct, this callback will be invoked after all such child objects
* are fully uninitialized and their respective destructors invoked.
*/
void (*free)(struct AVHWDeviceContext *ctx);
/**
* Arbitrary user data, to be used e.g. by the free() callback.
*/
void *user_opaque;
} AVHWDeviceContext;
typedef struct AVHWFramesInternal AVHWFramesInternal;
/**
* This struct describes a set or pool of "hardware" frames (i.e. those with
* data not located in normal system memory). All the frames in the pool are
* assumed to be allocated in the same way and interchangeable.
*
* This struct is reference-counted with the AVBuffer mechanism and tied to a
* given AVHWDeviceContext instance. The av_hwframe_ctx_alloc() constructor
* yields a reference, whose data field points to the actual AVHWFramesContext
* struct.
*/
typedef struct AVHWFramesContext {
/**
* A class for logging.
*/
const AVClass *av_class;
/**
* Private data used internally by libavutil. Must not be accessed in any
* way by the caller.
*/
AVHWFramesInternal *internal;
/**
* A reference to the parent AVHWDeviceContext. This reference is owned and
* managed by the enclosing AVHWFramesContext, but the caller may derive
* additional references from it.
*/
AVBufferRef *device_ref;
/**
* The parent AVHWDeviceContext. This is simply a pointer to
* device_ref->data provided for convenience.
*
* Set by libavutil in av_hwframe_ctx_init().
*/
AVHWDeviceContext *device_ctx;
/**
* The format-specific data, allocated and freed automatically along with
* this context.
*
* Should be cast by the user to the format-specific context defined in the
* corresponding header (hwframe_*.h) and filled as described in the
* documentation before calling av_hwframe_ctx_init().
*
* After any frames using this context are created, the contents of this
* struct should not be modified by the caller.
*/
void *hwctx;
/**
* This field may be set by the caller before calling av_hwframe_ctx_init().
*
* If non-NULL, this callback will be called when the last reference to
* this context is unreferenced, immediately before it is freed.
*/
void (*free)(struct AVHWFramesContext *ctx);
/**
* Arbitrary user data, to be used e.g. by the free() callback.
*/
void *user_opaque;
/**
* A pool from which the frames are allocated by av_hwframe_get_buffer().
* This field may be set by the caller before calling av_hwframe_ctx_init().
* The buffers returned by calling av_buffer_pool_get() on this pool must
* have the properties described in the documentation in the corresponding hw
* type's header (hwcontext_*.h). The pool will be freed strictly before
* this struct's free() callback is invoked.
*
* This field may be NULL, then libavutil will attempt to allocate a pool
* internally. Note that certain device types enforce pools allocated at
* fixed size (frame count), which cannot be extended dynamically. In such a
* case, initial_pool_size must be set appropriately.
*/
AVBufferPool *pool;
/**
* Initial size of the frame pool. If a device type does not support
* dynamically resizing the pool, then this is also the maximum pool size.
*
* May be set by the caller before calling av_hwframe_ctx_init(). Must be
* set if pool is NULL and the device type does not support dynamic pools.
*/
int initial_pool_size;
/**
* The pixel format identifying the underlying HW surface type.
*
* Must be a hwaccel format, i.e. the corresponding descriptor must have the
* AV_PIX_FMT_FLAG_HWACCEL flag set.
*
* Must be set by the user before calling av_hwframe_ctx_init().
*/
enum AVPixelFormat format;
/**
* The pixel format identifying the actual data layout of the hardware
* frames.
*
* Must be set by the caller before calling av_hwframe_ctx_init().
*
* @note when the underlying API does not provide the exact data layout, but
* only the colorspace/bit depth, this field should be set to the fully
* planar version of that format (e.g. for 8-bit 420 YUV it should be
* AV_PIX_FMT_YUV420P, not AV_PIX_FMT_NV12 or anything else).
*/
enum AVPixelFormat sw_format;
/**
* The allocated dimensions of the frames in this pool.
*
* Must be set by the user before calling av_hwframe_ctx_init().
*/
int width, height;
} AVHWFramesContext;
/**
* Look up an AVHWDeviceType by name.
*
* @param name String name of the device type (case-insensitive).
* @return The type from enum AVHWDeviceType, or AV_HWDEVICE_TYPE_NONE if
* not found.
*/
enum AVHWDeviceType av_hwdevice_find_type_by_name(const char *name);
/** Get the string name of an AVHWDeviceType.
*
* @param type Type from enum AVHWDeviceType.
* @return Pointer to a static string containing the name, or NULL if the type
* is not valid.
*/
const char *av_hwdevice_get_type_name(enum AVHWDeviceType type);
/**
* Iterate over supported device types.
*
* @param type AV_HWDEVICE_TYPE_NONE initially, then the previous type
* returned by this function in subsequent iterations.
* @return The next usable device type from enum AVHWDeviceType, or
* AV_HWDEVICE_TYPE_NONE if there are no more.
*/
enum AVHWDeviceType av_hwdevice_iterate_types(enum AVHWDeviceType prev);
/**
* Allocate an AVHWDeviceContext for a given hardware type.
*
* @param type the type of the hardware device to allocate.
* @return a reference to the newly created AVHWDeviceContext on success or NULL
* on failure.
*/
AVBufferRef *av_hwdevice_ctx_alloc(enum AVHWDeviceType type);
/**
* Finalize the device context before use. This function must be called after
* the context is filled with all the required information and before it is
* used in any way.
*
* @param ref a reference to the AVHWDeviceContext
* @return 0 on success, a negative AVERROR code on failure
*/
int av_hwdevice_ctx_init(AVBufferRef *ref);
/**
* Open a device of the specified type and create an AVHWDeviceContext for it.
*
* This is a convenience function intended to cover the simple cases. Callers
* who need to fine-tune device creation/management should open the device
* manually and then wrap it in an AVHWDeviceContext using
* av_hwdevice_ctx_alloc()/av_hwdevice_ctx_init().
*
* The returned context is already initialized and ready for use, the caller
* should not call av_hwdevice_ctx_init() on it. The user_opaque/free fields of
* the created AVHWDeviceContext are set by this function and should not be
* touched by the caller.
*
* @param device_ctx On success, a reference to the newly-created device context
* will be written here. The reference is owned by the caller
* and must be released with av_buffer_unref() when no longer
* needed. On failure, NULL will be written to this pointer.
* @param type The type of the device to create.
* @param device A type-specific string identifying the device to open.
* @param opts A dictionary of additional (type-specific) options to use in
* opening the device. The dictionary remains owned by the caller.
* @param flags currently unused
*
* @return 0 on success, a negative AVERROR code on failure.
*/
int av_hwdevice_ctx_create(AVBufferRef **device_ctx, enum AVHWDeviceType type,
const char *device, AVDictionary *opts, int flags);
/**
* Create a new device of the specified type from an existing device.
*
* If the source device is a device of the target type or was originally
* derived from such a device (possibly through one or more intermediate
* devices of other types), then this will return a reference to the
* existing device of the same type as is requested.
*
* Otherwise, it will attempt to derive a new device from the given source
* device. If direct derivation to the new type is not implemented, it will
* attempt the same derivation from each ancestor of the source device in
* turn looking for an implemented derivation method.
*
* @param dst_ctx On success, a reference to the newly-created
* AVHWDeviceContext.
* @param type The type of the new device to create.
* @param src_ctx A reference to an existing AVHWDeviceContext which will be
* used to create the new device.
* @param flags Currently unused; should be set to zero.
* @return Zero on success, a negative AVERROR code on failure.
*/
int av_hwdevice_ctx_create_derived(AVBufferRef **dst_ctx,
enum AVHWDeviceType type,
AVBufferRef *src_ctx, int flags);
/**
* Allocate an AVHWFramesContext tied to a given device context.
*
* @param device_ctx a reference to a AVHWDeviceContext. This function will make
* a new reference for internal use, the one passed to the
* function remains owned by the caller.
* @return a reference to the newly created AVHWFramesContext on success or NULL
* on failure.
*/
AVBufferRef *av_hwframe_ctx_alloc(AVBufferRef *device_ctx);
/**
* Finalize the context before use. This function must be called after the
* context is filled with all the required information and before it is attached
* to any frames.
*
* @param ref a reference to the AVHWFramesContext
* @return 0 on success, a negative AVERROR code on failure
*/
int av_hwframe_ctx_init(AVBufferRef *ref);
/**
* Allocate a new frame attached to the given AVHWFramesContext.
*
* @param hwframe_ctx a reference to an AVHWFramesContext
* @param frame an empty (freshly allocated or unreffed) frame to be filled with
* newly allocated buffers.
* @param flags currently unused, should be set to zero
* @return 0 on success, a negative AVERROR code on failure
*/
int av_hwframe_get_buffer(AVBufferRef *hwframe_ctx, AVFrame *frame, int flags);
/**
* Copy data to or from a hw surface. At least one of dst/src must have an
* AVHWFramesContext attached.
*
* If src has an AVHWFramesContext attached, then the format of dst (if set)
* must use one of the formats returned by av_hwframe_transfer_get_formats(src,
* AV_HWFRAME_TRANSFER_DIRECTION_FROM).
* If dst has an AVHWFramesContext attached, then the format of src must use one
* of the formats returned by av_hwframe_transfer_get_formats(dst,
* AV_HWFRAME_TRANSFER_DIRECTION_TO)
*
* dst may be "clean" (i.e. with data/buf pointers unset), in which case the
* data buffers will be allocated by this function using av_frame_get_buffer().
* If dst->format is set, then this format will be used, otherwise (when
* dst->format is AV_PIX_FMT_NONE) the first acceptable format will be chosen.
*
* The two frames must have matching allocated dimensions (i.e. equal to
* AVHWFramesContext.width/height), since not all device types support
* transferring a sub-rectangle of the whole surface. The display dimensions
* (i.e. AVFrame.width/height) may be smaller than the allocated dimensions, but
* also have to be equal for both frames. When the display dimensions are
* smaller than the allocated dimensions, the content of the padding in the
* destination frame is unspecified.
*
* @param dst the destination frame. dst is not touched on failure.
* @param src the source frame.
* @param flags currently unused, should be set to zero
* @return 0 on success, a negative AVERROR error code on failure.
*/
int av_hwframe_transfer_data(AVFrame *dst, const AVFrame *src, int flags);
enum AVHWFrameTransferDirection {
/**
* Transfer the data from the queried hw frame.
*/
AV_HWFRAME_TRANSFER_DIRECTION_FROM,
/**
* Transfer the data to the queried hw frame.
*/
AV_HWFRAME_TRANSFER_DIRECTION_TO,
};
/**
* Get a list of possible source or target formats usable in
* av_hwframe_transfer_data().
*
* @param hwframe_ctx the frame context to obtain the information for
* @param dir the direction of the transfer
* @param formats the pointer to the output format list will be written here.
* The list is terminated with AV_PIX_FMT_NONE and must be freed
* by the caller when no longer needed using av_free().
* If this function returns successfully, the format list will
* have at least one item (not counting the terminator).
* On failure, the contents of this pointer are unspecified.
* @param flags currently unused, should be set to zero
* @return 0 on success, a negative AVERROR code on failure.
*/
int av_hwframe_transfer_get_formats(AVBufferRef *hwframe_ctx,
enum AVHWFrameTransferDirection dir,
enum AVPixelFormat **formats, int flags);
/**
* This struct describes the constraints on hardware frames attached to
* a given device with a hardware-specific configuration. This is returned
* by av_hwdevice_get_hwframe_constraints() and must be freed by
* av_hwframe_constraints_free() after use.
*/
typedef struct AVHWFramesConstraints {
/**
* A list of possible values for format in the hw_frames_ctx,
* terminated by AV_PIX_FMT_NONE. This member will always be filled.
*/
enum AVPixelFormat *valid_hw_formats;
/**
* A list of possible values for sw_format in the hw_frames_ctx,
* terminated by AV_PIX_FMT_NONE. Can be NULL if this information is
* not known.
*/
enum AVPixelFormat *valid_sw_formats;
/**
* The minimum size of frames in this hw_frames_ctx.
* (Zero if not known.)
*/
int min_width;
int min_height;
/**
* The maximum size of frames in this hw_frames_ctx.
* (INT_MAX if not known / no limit.)
*/
int max_width;
int max_height;
} AVHWFramesConstraints;
/**
* Allocate a HW-specific configuration structure for a given HW device.
* After use, the user must free all members as required by the specific
* hardware structure being used, then free the structure itself with
* av_free().
*
* @param device_ctx a reference to the associated AVHWDeviceContext.
* @return The newly created HW-specific configuration structure on
* success or NULL on failure.
*/
void *av_hwdevice_hwconfig_alloc(AVBufferRef *device_ctx);
/**
* Get the constraints on HW frames given a device and the HW-specific
* configuration to be used with that device. If no HW-specific
* configuration is provided, returns the maximum possible capabilities
* of the device.
*
* @param ref a reference to the associated AVHWDeviceContext.
* @param hwconfig a filled HW-specific configuration structure, or NULL
* to return the maximum possible capabilities of the device.
* @return AVHWFramesConstraints structure describing the constraints
* on the device, or NULL if not available.
*/
AVHWFramesConstraints *av_hwdevice_get_hwframe_constraints(AVBufferRef *ref,
const void *hwconfig);
/**
* Free an AVHWFrameConstraints structure.
*
* @param constraints The (filled or unfilled) AVHWFrameConstraints structure.
*/
void av_hwframe_constraints_free(AVHWFramesConstraints **constraints);
/**
* Flags to apply to frame mappings.
*/
enum {
/**
* The mapping must be readable.
*/
AV_HWFRAME_MAP_READ = 1 << 0,
/**
* The mapping must be writeable.
*/
AV_HWFRAME_MAP_WRITE = 1 << 1,
/**
* The mapped frame will be overwritten completely in subsequent
* operations, so the current frame data need not be loaded. Any values
* which are not overwritten are unspecified.
*/
AV_HWFRAME_MAP_OVERWRITE = 1 << 2,
/**
* The mapping must be direct. That is, there must not be any copying in
* the map or unmap steps. Note that performance of direct mappings may
* be much lower than normal memory.
*/
AV_HWFRAME_MAP_DIRECT = 1 << 3,
};
/**
* Map a hardware frame.
*
* This has a number of different possible effects, depending on the format
* and origin of the src and dst frames. On input, src should be a usable
* frame with valid buffers and dst should be blank (typically as just created
* by av_frame_alloc()). src should have an associated hwframe context, and
* dst may optionally have a format and associated hwframe context.
*
* If src was created by mapping a frame from the hwframe context of dst,
* then this function undoes the mapping - dst is replaced by a reference to
* the frame that src was originally mapped from.
*
* If both src and dst have an associated hwframe context, then this function
* attempts to map the src frame from its hardware context to that of dst and
* then fill dst with appropriate data to be usable there. This will only be
* possible if the hwframe contexts and associated devices are compatible -
* given compatible devices, av_hwframe_ctx_create_derived() can be used to
* create a hwframe context for dst in which mapping should be possible.
*
* If src has a hwframe context but dst does not, then the src frame is
* mapped to normal memory and should thereafter be usable as a normal frame.
* If the format is set on dst, then the mapping will attempt to create dst
* with that format and fail if it is not possible. If format is unset (is
* AV_PIX_FMT_NONE) then dst will be mapped with whatever the most appropriate
* format to use is (probably the sw_format of the src hwframe context).
*
* A return value of AVERROR(ENOSYS) indicates that the mapping is not
* possible with the given arguments and hwframe setup, while other return
* values indicate that it failed somehow.
*
* @param dst Destination frame, to contain the mapping.
* @param src Source frame, to be mapped.
* @param flags Some combination of AV_HWFRAME_MAP_* flags.
* @return Zero on success, negative AVERROR code on failure.
*/
int av_hwframe_map(AVFrame *dst, const AVFrame *src, int flags);
/**
* Create and initialise an AVHWFramesContext as a mapping of another existing
* AVHWFramesContext on a different device.
*
* av_hwframe_ctx_init() should not be called after this.
*
* @param derived_frame_ctx On success, a reference to the newly created
* AVHWFramesContext.
* @param derived_device_ctx A reference to the device to create the new
* AVHWFramesContext on.
* @param source_frame_ctx A reference to an existing AVHWFramesContext
* which will be mapped to the derived context.
* @param flags Some combination of AV_HWFRAME_MAP_* flags, defining the
* mapping parameters to apply to frames which are allocated
* in the derived device.
* @return Zero on success, negative AVERROR code on failure.
*/
int av_hwframe_ctx_create_derived(AVBufferRef **derived_frame_ctx,
enum AVPixelFormat format,
AVBufferRef *derived_device_ctx,
AVBufferRef *source_frame_ctx,
int flags);
#endif /* AVUTIL_HWCONTEXT_H */

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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_HWCONTEXT_CUDA_H
#define AVUTIL_HWCONTEXT_CUDA_H
#ifndef CUDA_VERSION
#include <cuda.h>
#endif
#include "pixfmt.h"
/**
* @file
* An API-specific header for AV_HWDEVICE_TYPE_CUDA.
*
* This API supports dynamic frame pools. AVHWFramesContext.pool must return
* AVBufferRefs whose data pointer is a CUdeviceptr.
*/
typedef struct AVCUDADeviceContextInternal AVCUDADeviceContextInternal;
/**
* This struct is allocated as AVHWDeviceContext.hwctx
*/
typedef struct AVCUDADeviceContext {
CUcontext cuda_ctx;
AVCUDADeviceContextInternal *internal;
} AVCUDADeviceContext;
/**
* AVHWFramesContext.hwctx is currently not used
*/
#endif /* AVUTIL_HWCONTEXT_CUDA_H */

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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_HWCONTEXT_D3D11VA_H
#define AVUTIL_HWCONTEXT_D3D11VA_H
/**
* @file
* An API-specific header for AV_HWDEVICE_TYPE_D3D11VA.
*
* The default pool implementation will be fixed-size if initial_pool_size is
* set (and allocate elements from an array texture). Otherwise it will allocate
* individual textures. Be aware that decoding requires a single array texture.
*
* Using sw_format==AV_PIX_FMT_YUV420P has special semantics, and maps to
* DXGI_FORMAT_420_OPAQUE. av_hwframe_transfer_data() is not supported for
* this format. Refer to MSDN for details.
*
* av_hwdevice_ctx_create() for this device type supports a key named "debug"
* for the AVDictionary entry. If this is set to any value, the device creation
* code will try to load various supported D3D debugging layers.
*/
#include <d3d11.h>
/**
* This struct is allocated as AVHWDeviceContext.hwctx
*/
typedef struct AVD3D11VADeviceContext {
/**
* Device used for texture creation and access. This can also be used to
* set the libavcodec decoding device.
*
* Must be set by the user. This is the only mandatory field - the other
* device context fields are set from this and are available for convenience.
*
* Deallocating the AVHWDeviceContext will always release this interface,
* and it does not matter whether it was user-allocated.
*/
ID3D11Device *device;
/**
* If unset, this will be set from the device field on init.
*
* Deallocating the AVHWDeviceContext will always release this interface,
* and it does not matter whether it was user-allocated.
*/
ID3D11DeviceContext *device_context;
/**
* If unset, this will be set from the device field on init.
*
* Deallocating the AVHWDeviceContext will always release this interface,
* and it does not matter whether it was user-allocated.
*/
ID3D11VideoDevice *video_device;
/**
* If unset, this will be set from the device_context field on init.
*
* Deallocating the AVHWDeviceContext will always release this interface,
* and it does not matter whether it was user-allocated.
*/
ID3D11VideoContext *video_context;
/**
* Callbacks for locking. They protect accesses to device_context and
* video_context calls. They also protect access to the internal staging
* texture (for av_hwframe_transfer_data() calls). They do NOT protect
* access to hwcontext or decoder state in general.
*
* If unset on init, the hwcontext implementation will set them to use an
* internal mutex.
*
* The underlying lock must be recursive. lock_ctx is for free use by the
* locking implementation.
*/
void (*lock)(void *lock_ctx);
void (*unlock)(void *lock_ctx);
void *lock_ctx;
} AVD3D11VADeviceContext;
/**
* D3D11 frame descriptor for pool allocation.
*
* In user-allocated pools, AVHWFramesContext.pool must return AVBufferRefs
* with the data pointer pointing at an object of this type describing the
* planes of the frame.
*
* This has no use outside of custom allocation, and AVFrame AVBufferRef do not
* necessarily point to an instance of this struct.
*/
typedef struct AVD3D11FrameDescriptor {
/**
* The texture in which the frame is located. The reference count is
* managed by the AVBufferRef, and destroying the reference will release
* the interface.
*
* Normally stored in AVFrame.data[0].
*/
ID3D11Texture2D *texture;
/**
* The index into the array texture element representing the frame, or 0
* if the texture is not an array texture.
*
* Normally stored in AVFrame.data[1] (cast from intptr_t).
*/
intptr_t index;
} AVD3D11FrameDescriptor;
/**
* This struct is allocated as AVHWFramesContext.hwctx
*/
typedef struct AVD3D11VAFramesContext {
/**
* The canonical texture used for pool allocation. If this is set to NULL
* on init, the hwframes implementation will allocate and set an array
* texture if initial_pool_size > 0.
*
* The only situation when the API user should set this is:
* - the user wants to do manual pool allocation (setting
* AVHWFramesContext.pool), instead of letting AVHWFramesContext
* allocate the pool
* - of an array texture
* - and wants it to use it for decoding
* - this has to be done before calling av_hwframe_ctx_init()
*
* Deallocating the AVHWFramesContext will always release this interface,
* and it does not matter whether it was user-allocated.
*
* This is in particular used by the libavcodec D3D11VA hwaccel, which
* requires a single array texture. It will create ID3D11VideoDecoderOutputView
* objects for each array texture element on decoder initialization.
*/
ID3D11Texture2D *texture;
/**
* D3D11_TEXTURE2D_DESC.BindFlags used for texture creation. The user must
* at least set D3D11_BIND_DECODER if the frames context is to be used for
* video decoding.
* This field is ignored/invalid if a user-allocated texture is provided.
*/
UINT BindFlags;
/**
* D3D11_TEXTURE2D_DESC.MiscFlags used for texture creation.
* This field is ignored/invalid if a user-allocated texture is provided.
*/
UINT MiscFlags;
} AVD3D11VAFramesContext;
#endif /* AVUTIL_HWCONTEXT_D3D11VA_H */

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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_HWCONTEXT_DRM_H
#define AVUTIL_HWCONTEXT_DRM_H
#include <stddef.h>
#include <stdint.h>
/**
* @file
* API-specific header for AV_HWDEVICE_TYPE_DRM.
*
* Internal frame allocation is not currently supported - all frames
* must be allocated by the user. Thus AVHWFramesContext is always
* NULL, though this may change if support for frame allocation is
* added in future.
*/
enum {
/**
* The maximum number of layers/planes in a DRM frame.
*/
AV_DRM_MAX_PLANES = 4
};
/**
* DRM object descriptor.
*
* Describes a single DRM object, addressing it as a PRIME file
* descriptor.
*/
typedef struct AVDRMObjectDescriptor {
/**
* DRM PRIME fd for the object.
*/
int fd;
/**
* Total size of the object.
*
* (This includes any parts not which do not contain image data.)
*/
size_t size;
/**
* Format modifier applied to the object (DRM_FORMAT_MOD_*).
*/
uint64_t format_modifier;
} AVDRMObjectDescriptor;
/**
* DRM plane descriptor.
*
* Describes a single plane of a layer, which is contained within
* a single object.
*/
typedef struct AVDRMPlaneDescriptor {
/**
* Index of the object containing this plane in the objects
* array of the enclosing frame descriptor.
*/
int object_index;
/**
* Offset within that object of this plane.
*/
ptrdiff_t offset;
/**
* Pitch (linesize) of this plane.
*/
ptrdiff_t pitch;
} AVDRMPlaneDescriptor;
/**
* DRM layer descriptor.
*
* Describes a single layer within a frame. This has the structure
* defined by its format, and will contain one or more planes.
*/
typedef struct AVDRMLayerDescriptor {
/**
* Format of the layer (DRM_FORMAT_*).
*/
uint32_t format;
/**
* Number of planes in the layer.
*
* This must match the number of planes required by format.
*/
int nb_planes;
/**
* Array of planes in this layer.
*/
AVDRMPlaneDescriptor planes[AV_DRM_MAX_PLANES];
} AVDRMLayerDescriptor;
/**
* DRM frame descriptor.
*
* This is used as the data pointer for AV_PIX_FMT_DRM_PRIME frames.
* It is also used by user-allocated frame pools - allocating in
* AVHWFramesContext.pool must return AVBufferRefs which contain
* an object of this type.
*
* The fields of this structure should be set such it can be
* imported directly by EGL using the EGL_EXT_image_dma_buf_import
* and EGL_EXT_image_dma_buf_import_modifiers extensions.
* (Note that the exact layout of a particular format may vary between
* platforms - we only specify that the same platform should be able
* to import it.)
*
* The total number of planes must not exceed AV_DRM_MAX_PLANES, and
* the order of the planes by increasing layer index followed by
* increasing plane index must be the same as the order which would
* be used for the data pointers in the equivalent software format.
*/
typedef struct AVDRMFrameDescriptor {
/**
* Number of DRM objects making up this frame.
*/
int nb_objects;
/**
* Array of objects making up the frame.
*/
AVDRMObjectDescriptor objects[AV_DRM_MAX_PLANES];
/**
* Number of layers in the frame.
*/
int nb_layers;
/**
* Array of layers in the frame.
*/
AVDRMLayerDescriptor layers[AV_DRM_MAX_PLANES];
} AVDRMFrameDescriptor;
/**
* DRM device.
*
* Allocated as AVHWDeviceContext.hwctx.
*/
typedef struct AVDRMDeviceContext {
/**
* File descriptor of DRM device.
*
* This is used as the device to create frames on, and may also be
* used in some derivation and mapping operations.
*
* If no device is required, set to -1.
*/
int fd;
} AVDRMDeviceContext;
#endif /* AVUTIL_HWCONTEXT_DRM_H */

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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_HWCONTEXT_DXVA2_H
#define AVUTIL_HWCONTEXT_DXVA2_H
/**
* @file
* An API-specific header for AV_HWDEVICE_TYPE_DXVA2.
*
* Only fixed-size pools are supported.
*
* For user-allocated pools, AVHWFramesContext.pool must return AVBufferRefs
* with the data pointer set to a pointer to IDirect3DSurface9.
*/
#include <d3d9.h>
#include <dxva2api.h>
/**
* This struct is allocated as AVHWDeviceContext.hwctx
*/
typedef struct AVDXVA2DeviceContext {
IDirect3DDeviceManager9 *devmgr;
} AVDXVA2DeviceContext;
/**
* This struct is allocated as AVHWFramesContext.hwctx
*/
typedef struct AVDXVA2FramesContext {
/**
* The surface type (e.g. DXVA2_VideoProcessorRenderTarget or
* DXVA2_VideoDecoderRenderTarget). Must be set by the caller.
*/
DWORD surface_type;
/**
* The surface pool. When an external pool is not provided by the caller,
* this will be managed (allocated and filled on init, freed on uninit) by
* libavutil.
*/
IDirect3DSurface9 **surfaces;
int nb_surfaces;
/**
* Certain drivers require the decoder to be destroyed before the surfaces.
* To allow internally managed pools to work properly in such cases, this
* field is provided.
*
* If it is non-NULL, libavutil will call IDirectXVideoDecoder_Release() on
* it just before the internal surface pool is freed.
*
* This is for convenience only. Some code uses other methods to manage the
* decoder reference.
*/
IDirectXVideoDecoder *decoder_to_release;
} AVDXVA2FramesContext;
#endif /* AVUTIL_HWCONTEXT_DXVA2_H */

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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_HWCONTEXT_QSV_H
#define AVUTIL_HWCONTEXT_QSV_H
#include <mfx/mfxvideo.h>
/**
* @file
* An API-specific header for AV_HWDEVICE_TYPE_QSV.
*
* This API does not support dynamic frame pools. AVHWFramesContext.pool must
* contain AVBufferRefs whose data pointer points to an mfxFrameSurface1 struct.
*/
/**
* This struct is allocated as AVHWDeviceContext.hwctx
*/
typedef struct AVQSVDeviceContext {
mfxSession session;
} AVQSVDeviceContext;
/**
* This struct is allocated as AVHWFramesContext.hwctx
*/
typedef struct AVQSVFramesContext {
mfxFrameSurface1 *surfaces;
int nb_surfaces;
/**
* A combination of MFX_MEMTYPE_* describing the frame pool.
*/
int frame_type;
} AVQSVFramesContext;
#endif /* AVUTIL_HWCONTEXT_QSV_H */

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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_HWCONTEXT_VAAPI_H
#define AVUTIL_HWCONTEXT_VAAPI_H
#include <va/va.h>
/**
* @file
* API-specific header for AV_HWDEVICE_TYPE_VAAPI.
*
* Dynamic frame pools are supported, but note that any pool used as a render
* target is required to be of fixed size in order to be be usable as an
* argument to vaCreateContext().
*
* For user-allocated pools, AVHWFramesContext.pool must return AVBufferRefs
* with the data pointer set to a VASurfaceID.
*/
enum {
/**
* The quirks field has been set by the user and should not be detected
* automatically by av_hwdevice_ctx_init().
*/
AV_VAAPI_DRIVER_QUIRK_USER_SET = (1 << 0),
/**
* The driver does not destroy parameter buffers when they are used by
* vaRenderPicture(). Additional code will be required to destroy them
* separately afterwards.
*/
AV_VAAPI_DRIVER_QUIRK_RENDER_PARAM_BUFFERS = (1 << 1),
/**
* The driver does not support the VASurfaceAttribMemoryType attribute,
* so the surface allocation code will not try to use it.
*/
AV_VAAPI_DRIVER_QUIRK_ATTRIB_MEMTYPE = (1 << 2),
/**
* The driver does not support surface attributes at all.
* The surface allocation code will never pass them to surface allocation,
* and the results of the vaQuerySurfaceAttributes() call will be faked.
*/
AV_VAAPI_DRIVER_QUIRK_SURFACE_ATTRIBUTES = (1 << 3),
};
/**
* VAAPI connection details.
*
* Allocated as AVHWDeviceContext.hwctx
*/
typedef struct AVVAAPIDeviceContext {
/**
* The VADisplay handle, to be filled by the user.
*/
VADisplay display;
/**
* Driver quirks to apply - this is filled by av_hwdevice_ctx_init(),
* with reference to a table of known drivers, unless the
* AV_VAAPI_DRIVER_QUIRK_USER_SET bit is already present. The user
* may need to refer to this field when performing any later
* operations using VAAPI with the same VADisplay.
*/
unsigned int driver_quirks;
} AVVAAPIDeviceContext;
/**
* VAAPI-specific data associated with a frame pool.
*
* Allocated as AVHWFramesContext.hwctx.
*/
typedef struct AVVAAPIFramesContext {
/**
* Set by the user to apply surface attributes to all surfaces in
* the frame pool. If null, default settings are used.
*/
VASurfaceAttrib *attributes;
int nb_attributes;
/**
* The surfaces IDs of all surfaces in the pool after creation.
* Only valid if AVHWFramesContext.initial_pool_size was positive.
* These are intended to be used as the render_targets arguments to
* vaCreateContext().
*/
VASurfaceID *surface_ids;
int nb_surfaces;
} AVVAAPIFramesContext;
/**
* VAAPI hardware pipeline configuration details.
*
* Allocated with av_hwdevice_hwconfig_alloc().
*/
typedef struct AVVAAPIHWConfig {
/**
* ID of a VAAPI pipeline configuration.
*/
VAConfigID config_id;
} AVVAAPIHWConfig;
#endif /* AVUTIL_HWCONTEXT_VAAPI_H */

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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_HWCONTEXT_VDPAU_H
#define AVUTIL_HWCONTEXT_VDPAU_H
#include <vdpau/vdpau.h>
/**
* @file
* An API-specific header for AV_HWDEVICE_TYPE_VDPAU.
*
* This API supports dynamic frame pools. AVHWFramesContext.pool must return
* AVBufferRefs whose data pointer is a VdpVideoSurface.
*/
/**
* This struct is allocated as AVHWDeviceContext.hwctx
*/
typedef struct AVVDPAUDeviceContext {
VdpDevice device;
VdpGetProcAddress *get_proc_address;
} AVVDPAUDeviceContext;
/**
* AVHWFramesContext.hwctx is currently not used
*/
#endif /* AVUTIL_HWCONTEXT_VDPAU_H */

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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_HWCONTEXT_VIDEOTOOLBOX_H
#define AVUTIL_HWCONTEXT_VIDEOTOOLBOX_H
#include <stdint.h>
#include <VideoToolbox/VideoToolbox.h>
#include "pixfmt.h"
/**
* @file
* An API-specific header for AV_HWDEVICE_TYPE_VIDEOTOOLBOX.
*
* This API currently does not support frame allocation, as the raw VideoToolbox
* API does allocation, and FFmpeg itself never has the need to allocate frames.
*
* If the API user sets a custom pool, AVHWFramesContext.pool must return
* AVBufferRefs whose data pointer is a CVImageBufferRef or CVPixelBufferRef.
*
* Currently AVHWDeviceContext.hwctx and AVHWFramesContext.hwctx are always
* NULL.
*/
/**
* Convert a VideoToolbox (actually CoreVideo) format to AVPixelFormat.
* Returns AV_PIX_FMT_NONE if no known equivalent was found.
*/
enum AVPixelFormat av_map_videotoolbox_format_to_pixfmt(uint32_t cv_fmt);
/**
* Convert an AVPixelFormat to a VideoToolbox (actually CoreVideo) format.
* Returns 0 if no known equivalent was found.
*/
uint32_t av_map_videotoolbox_format_from_pixfmt(enum AVPixelFormat pix_fmt);
#endif /* AVUTIL_HWCONTEXT_VIDEOTOOLBOX_H */

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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_IMGUTILS_H
#define AVUTIL_IMGUTILS_H
/**
* @file
* misc image utilities
*
* @addtogroup lavu_picture
* @{
*/
#include "avutil.h"
#include "pixdesc.h"
#include "rational.h"
/**
* Compute the max pixel step for each plane of an image with a
* format described by pixdesc.
*
* The pixel step is the distance in bytes between the first byte of
* the group of bytes which describe a pixel component and the first
* byte of the successive group in the same plane for the same
* component.
*
* @param max_pixsteps an array which is filled with the max pixel step
* for each plane. Since a plane may contain different pixel
* components, the computed max_pixsteps[plane] is relative to the
* component in the plane with the max pixel step.
* @param max_pixstep_comps an array which is filled with the component
* for each plane which has the max pixel step. May be NULL.
*/
void av_image_fill_max_pixsteps(int max_pixsteps[4], int max_pixstep_comps[4],
const AVPixFmtDescriptor *pixdesc);
/**
* Compute the size of an image line with format pix_fmt and width
* width for the plane plane.
*
* @return the computed size in bytes
*/
int av_image_get_linesize(enum AVPixelFormat pix_fmt, int width, int plane);
/**
* Fill plane linesizes for an image with pixel format pix_fmt and
* width width.
*
* @param linesizes array to be filled with the linesize for each plane
* @return >= 0 in case of success, a negative error code otherwise
*/
int av_image_fill_linesizes(int linesizes[4], enum AVPixelFormat pix_fmt, int width);
/**
* Fill plane data pointers for an image with pixel format pix_fmt and
* height height.
*
* @param data pointers array to be filled with the pointer for each image plane
* @param ptr the pointer to a buffer which will contain the image
* @param linesizes the array containing the linesize for each
* plane, should be filled by av_image_fill_linesizes()
* @return the size in bytes required for the image buffer, a negative
* error code in case of failure
*/
int av_image_fill_pointers(uint8_t *data[4], enum AVPixelFormat pix_fmt, int height,
uint8_t *ptr, const int linesizes[4]);
/**
* Allocate an image with size w and h and pixel format pix_fmt, and
* fill pointers and linesizes accordingly.
* The allocated image buffer has to be freed by using
* av_freep(&pointers[0]).
*
* @param align the value to use for buffer size alignment
* @return the size in bytes required for the image buffer, a negative
* error code in case of failure
*/
int av_image_alloc(uint8_t *pointers[4], int linesizes[4],
int w, int h, enum AVPixelFormat pix_fmt, int align);
/**
* Copy image plane from src to dst.
* That is, copy "height" number of lines of "bytewidth" bytes each.
* The first byte of each successive line is separated by *_linesize
* bytes.
*
* bytewidth must be contained by both absolute values of dst_linesize
* and src_linesize, otherwise the function behavior is undefined.
*
* @param dst_linesize linesize for the image plane in dst
* @param src_linesize linesize for the image plane in src
*/
void av_image_copy_plane(uint8_t *dst, int dst_linesize,
const uint8_t *src, int src_linesize,
int bytewidth, int height);
/**
* Copy image in src_data to dst_data.
*
* @param dst_linesizes linesizes for the image in dst_data
* @param src_linesizes linesizes for the image in src_data
*/
void av_image_copy(uint8_t *dst_data[4], int dst_linesizes[4],
const uint8_t *src_data[4], const int src_linesizes[4],
enum AVPixelFormat pix_fmt, int width, int height);
/**
* Copy image data located in uncacheable (e.g. GPU mapped) memory. Where
* available, this function will use special functionality for reading from such
* memory, which may result in greatly improved performance compared to plain
* av_image_copy().
*
* The data pointers and the linesizes must be aligned to the maximum required
* by the CPU architecture.
*
* @note The linesize parameters have the type ptrdiff_t here, while they are
* int for av_image_copy().
* @note On x86, the linesizes currently need to be aligned to the cacheline
* size (i.e. 64) to get improved performance.
*/
void av_image_copy_uc_from(uint8_t *dst_data[4], const ptrdiff_t dst_linesizes[4],
const uint8_t *src_data[4], const ptrdiff_t src_linesizes[4],
enum AVPixelFormat pix_fmt, int width, int height);
/**
* Setup the data pointers and linesizes based on the specified image
* parameters and the provided array.
*
* The fields of the given image are filled in by using the src
* address which points to the image data buffer. Depending on the
* specified pixel format, one or multiple image data pointers and
* line sizes will be set. If a planar format is specified, several
* pointers will be set pointing to the different picture planes and
* the line sizes of the different planes will be stored in the
* lines_sizes array. Call with src == NULL to get the required
* size for the src buffer.
*
* To allocate the buffer and fill in the dst_data and dst_linesize in
* one call, use av_image_alloc().
*
* @param dst_data data pointers to be filled in
* @param dst_linesize linesizes for the image in dst_data to be filled in
* @param src buffer which will contain or contains the actual image data, can be NULL
* @param pix_fmt the pixel format of the image
* @param width the width of the image in pixels
* @param height the height of the image in pixels
* @param align the value used in src for linesize alignment
* @return the size in bytes required for src, a negative error code
* in case of failure
*/
int av_image_fill_arrays(uint8_t *dst_data[4], int dst_linesize[4],
const uint8_t *src,
enum AVPixelFormat pix_fmt, int width, int height, int align);
/**
* Return the size in bytes of the amount of data required to store an
* image with the given parameters.
*
* @param pix_fmt the pixel format of the image
* @param width the width of the image in pixels
* @param height the height of the image in pixels
* @param align the assumed linesize alignment
* @return the buffer size in bytes, a negative error code in case of failure
*/
int av_image_get_buffer_size(enum AVPixelFormat pix_fmt, int width, int height, int align);
/**
* Copy image data from an image into a buffer.
*
* av_image_get_buffer_size() can be used to compute the required size
* for the buffer to fill.
*
* @param dst a buffer into which picture data will be copied
* @param dst_size the size in bytes of dst
* @param src_data pointers containing the source image data
* @param src_linesize linesizes for the image in src_data
* @param pix_fmt the pixel format of the source image
* @param width the width of the source image in pixels
* @param height the height of the source image in pixels
* @param align the assumed linesize alignment for dst
* @return the number of bytes written to dst, or a negative value
* (error code) on error
*/
int av_image_copy_to_buffer(uint8_t *dst, int dst_size,
const uint8_t * const src_data[4], const int src_linesize[4],
enum AVPixelFormat pix_fmt, int width, int height, int align);
/**
* Check if the given dimension of an image is valid, meaning that all
* bytes of the image can be addressed with a signed int.
*
* @param w the width of the picture
* @param h the height of the picture
* @param log_offset the offset to sum to the log level for logging with log_ctx
* @param log_ctx the parent logging context, it may be NULL
* @return >= 0 if valid, a negative error code otherwise
*/
int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx);
/**
* Check if the given dimension of an image is valid, meaning that all
* bytes of a plane of an image with the specified pix_fmt can be addressed
* with a signed int.
*
* @param w the width of the picture
* @param h the height of the picture
* @param max_pixels the maximum number of pixels the user wants to accept
* @param pix_fmt the pixel format, can be AV_PIX_FMT_NONE if unknown.
* @param log_offset the offset to sum to the log level for logging with log_ctx
* @param log_ctx the parent logging context, it may be NULL
* @return >= 0 if valid, a negative error code otherwise
*/
int av_image_check_size2(unsigned int w, unsigned int h, int64_t max_pixels, enum AVPixelFormat pix_fmt, int log_offset, void *log_ctx);
/**
* Check if the given sample aspect ratio of an image is valid.
*
* It is considered invalid if the denominator is 0 or if applying the ratio
* to the image size would make the smaller dimension less than 1. If the
* sar numerator is 0, it is considered unknown and will return as valid.
*
* @param w width of the image
* @param h height of the image
* @param sar sample aspect ratio of the image
* @return 0 if valid, a negative AVERROR code otherwise
*/
int av_image_check_sar(unsigned int w, unsigned int h, AVRational sar);
/**
* Overwrite the image data with black. This is suitable for filling a
* sub-rectangle of an image, meaning the padding between the right most pixel
* and the left most pixel on the next line will not be overwritten. For some
* formats, the image size might be rounded up due to inherent alignment.
*
* If the pixel format has alpha, the alpha is cleared to opaque.
*
* This can return an error if the pixel format is not supported. Normally, all
* non-hwaccel pixel formats should be supported.
*
* Passing NULL for dst_data is allowed. Then the function returns whether the
* operation would have succeeded. (It can return an error if the pix_fmt is
* not supported.)
*
* @param dst_data data pointers to destination image
* @param dst_linesize linesizes for the destination image
* @param pix_fmt the pixel format of the image
* @param range the color range of the image (important for colorspaces such as YUV)
* @param width the width of the image in pixels
* @param height the height of the image in pixels
* @return 0 if the image data was cleared, a negative AVERROR code otherwise
*/
int av_image_fill_black(uint8_t *dst_data[4], const ptrdiff_t dst_linesize[4],
enum AVPixelFormat pix_fmt, enum AVColorRange range,
int width, int height);
/**
* @}
*/
#endif /* AVUTIL_IMGUTILS_H */

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/*
* Copyright (c) 2011 Mans Rullgard
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_INTFLOAT_H
#define AVUTIL_INTFLOAT_H
#include <stdint.h>
#include "attributes.h"
union av_intfloat32 {
uint32_t i;
float f;
};
union av_intfloat64 {
uint64_t i;
double f;
};
/**
* Reinterpret a 32-bit integer as a float.
*/
static av_always_inline float av_int2float(uint32_t i)
{
union av_intfloat32 v;
v.i = i;
return v.f;
}
/**
* Reinterpret a float as a 32-bit integer.
*/
static av_always_inline uint32_t av_float2int(float f)
{
union av_intfloat32 v;
v.f = f;
return v.i;
}
/**
* Reinterpret a 64-bit integer as a double.
*/
static av_always_inline double av_int2double(uint64_t i)
{
union av_intfloat64 v;
v.i = i;
return v.f;
}
/**
* Reinterpret a double as a 64-bit integer.
*/
static av_always_inline uint64_t av_double2int(double f)
{
union av_intfloat64 v;
v.f = f;
return v.i;
}
#endif /* AVUTIL_INTFLOAT_H */

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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_INTREADWRITE_H
#define AVUTIL_INTREADWRITE_H
#include <stdint.h>
#include "libavutil/avconfig.h"
#include "attributes.h"
#include "bswap.h"
typedef union {
uint64_t u64;
uint32_t u32[2];
uint16_t u16[4];
uint8_t u8 [8];
double f64;
float f32[2];
} av_alias av_alias64;
typedef union {
uint32_t u32;
uint16_t u16[2];
uint8_t u8 [4];
float f32;
} av_alias av_alias32;
typedef union {
uint16_t u16;
uint8_t u8 [2];
} av_alias av_alias16;
/*
* Arch-specific headers can provide any combination of
* AV_[RW][BLN](16|24|32|48|64) and AV_(COPY|SWAP|ZERO)(64|128) macros.
* Preprocessor symbols must be defined, even if these are implemented
* as inline functions.
*
* R/W means read/write, B/L/N means big/little/native endianness.
* The following macros require aligned access, compared to their
* unaligned variants: AV_(COPY|SWAP|ZERO)(64|128), AV_[RW]N[8-64]A.
* Incorrect usage may range from abysmal performance to crash
* depending on the platform.
*
* The unaligned variants are AV_[RW][BLN][8-64] and AV_COPY*U.
*/
#ifdef HAVE_AV_CONFIG_H
#include "config.h"
#if ARCH_ARM
# include "arm/intreadwrite.h"
#elif ARCH_AVR32
# include "avr32/intreadwrite.h"
#elif ARCH_MIPS
# include "mips/intreadwrite.h"
#elif ARCH_PPC
# include "ppc/intreadwrite.h"
#elif ARCH_TOMI
# include "tomi/intreadwrite.h"
#elif ARCH_X86
# include "x86/intreadwrite.h"
#endif
#endif /* HAVE_AV_CONFIG_H */
/*
* Map AV_RNXX <-> AV_R[BL]XX for all variants provided by per-arch headers.
*/
#if AV_HAVE_BIGENDIAN
# if defined(AV_RN16) && !defined(AV_RB16)
# define AV_RB16(p) AV_RN16(p)
# elif !defined(AV_RN16) && defined(AV_RB16)
# define AV_RN16(p) AV_RB16(p)
# endif
# if defined(AV_WN16) && !defined(AV_WB16)
# define AV_WB16(p, v) AV_WN16(p, v)
# elif !defined(AV_WN16) && defined(AV_WB16)
# define AV_WN16(p, v) AV_WB16(p, v)
# endif
# if defined(AV_RN24) && !defined(AV_RB24)
# define AV_RB24(p) AV_RN24(p)
# elif !defined(AV_RN24) && defined(AV_RB24)
# define AV_RN24(p) AV_RB24(p)
# endif
# if defined(AV_WN24) && !defined(AV_WB24)
# define AV_WB24(p, v) AV_WN24(p, v)
# elif !defined(AV_WN24) && defined(AV_WB24)
# define AV_WN24(p, v) AV_WB24(p, v)
# endif
# if defined(AV_RN32) && !defined(AV_RB32)
# define AV_RB32(p) AV_RN32(p)
# elif !defined(AV_RN32) && defined(AV_RB32)
# define AV_RN32(p) AV_RB32(p)
# endif
# if defined(AV_WN32) && !defined(AV_WB32)
# define AV_WB32(p, v) AV_WN32(p, v)
# elif !defined(AV_WN32) && defined(AV_WB32)
# define AV_WN32(p, v) AV_WB32(p, v)
# endif
# if defined(AV_RN48) && !defined(AV_RB48)
# define AV_RB48(p) AV_RN48(p)
# elif !defined(AV_RN48) && defined(AV_RB48)
# define AV_RN48(p) AV_RB48(p)
# endif
# if defined(AV_WN48) && !defined(AV_WB48)
# define AV_WB48(p, v) AV_WN48(p, v)
# elif !defined(AV_WN48) && defined(AV_WB48)
# define AV_WN48(p, v) AV_WB48(p, v)
# endif
# if defined(AV_RN64) && !defined(AV_RB64)
# define AV_RB64(p) AV_RN64(p)
# elif !defined(AV_RN64) && defined(AV_RB64)
# define AV_RN64(p) AV_RB64(p)
# endif
# if defined(AV_WN64) && !defined(AV_WB64)
# define AV_WB64(p, v) AV_WN64(p, v)
# elif !defined(AV_WN64) && defined(AV_WB64)
# define AV_WN64(p, v) AV_WB64(p, v)
# endif
#else /* AV_HAVE_BIGENDIAN */
# if defined(AV_RN16) && !defined(AV_RL16)
# define AV_RL16(p) AV_RN16(p)
# elif !defined(AV_RN16) && defined(AV_RL16)
# define AV_RN16(p) AV_RL16(p)
# endif
# if defined(AV_WN16) && !defined(AV_WL16)
# define AV_WL16(p, v) AV_WN16(p, v)
# elif !defined(AV_WN16) && defined(AV_WL16)
# define AV_WN16(p, v) AV_WL16(p, v)
# endif
# if defined(AV_RN24) && !defined(AV_RL24)
# define AV_RL24(p) AV_RN24(p)
# elif !defined(AV_RN24) && defined(AV_RL24)
# define AV_RN24(p) AV_RL24(p)
# endif
# if defined(AV_WN24) && !defined(AV_WL24)
# define AV_WL24(p, v) AV_WN24(p, v)
# elif !defined(AV_WN24) && defined(AV_WL24)
# define AV_WN24(p, v) AV_WL24(p, v)
# endif
# if defined(AV_RN32) && !defined(AV_RL32)
# define AV_RL32(p) AV_RN32(p)
# elif !defined(AV_RN32) && defined(AV_RL32)
# define AV_RN32(p) AV_RL32(p)
# endif
# if defined(AV_WN32) && !defined(AV_WL32)
# define AV_WL32(p, v) AV_WN32(p, v)
# elif !defined(AV_WN32) && defined(AV_WL32)
# define AV_WN32(p, v) AV_WL32(p, v)
# endif
# if defined(AV_RN48) && !defined(AV_RL48)
# define AV_RL48(p) AV_RN48(p)
# elif !defined(AV_RN48) && defined(AV_RL48)
# define AV_RN48(p) AV_RL48(p)
# endif
# if defined(AV_WN48) && !defined(AV_WL48)
# define AV_WL48(p, v) AV_WN48(p, v)
# elif !defined(AV_WN48) && defined(AV_WL48)
# define AV_WN48(p, v) AV_WL48(p, v)
# endif
# if defined(AV_RN64) && !defined(AV_RL64)
# define AV_RL64(p) AV_RN64(p)
# elif !defined(AV_RN64) && defined(AV_RL64)
# define AV_RN64(p) AV_RL64(p)
# endif
# if defined(AV_WN64) && !defined(AV_WL64)
# define AV_WL64(p, v) AV_WN64(p, v)
# elif !defined(AV_WN64) && defined(AV_WL64)
# define AV_WN64(p, v) AV_WL64(p, v)
# endif
#endif /* !AV_HAVE_BIGENDIAN */
/*
* Define AV_[RW]N helper macros to simplify definitions not provided
* by per-arch headers.
*/
#if defined(__GNUC__) && !defined(__TI_COMPILER_VERSION__)
union unaligned_64 { uint64_t l; } __attribute__((packed)) av_alias;
union unaligned_32 { uint32_t l; } __attribute__((packed)) av_alias;
union unaligned_16 { uint16_t l; } __attribute__((packed)) av_alias;
# define AV_RN(s, p) (((const union unaligned_##s *) (p))->l)
# define AV_WN(s, p, v) ((((union unaligned_##s *) (p))->l) = (v))
#elif defined(__DECC)
# define AV_RN(s, p) (*((const __unaligned uint##s##_t*)(p)))
# define AV_WN(s, p, v) (*((__unaligned uint##s##_t*)(p)) = (v))
#elif defined(_MSC_VER) && (defined(_M_ARM) || defined(_M_X64)) && AV_HAVE_FAST_UNALIGNED
# define AV_RN(s, p) (*((const __unaligned uint##s##_t*)(p)))
# define AV_WN(s, p, v) (*((__unaligned uint##s##_t*)(p)) = (v))
#elif AV_HAVE_FAST_UNALIGNED
# define AV_RN(s, p) (((const av_alias##s*)(p))->u##s)
# define AV_WN(s, p, v) (((av_alias##s*)(p))->u##s = (v))
#else
#ifndef AV_RB16
# define AV_RB16(x) \
((((const uint8_t*)(x))[0] << 8) | \
((const uint8_t*)(x))[1])
#endif
#ifndef AV_WB16
# define AV_WB16(p, val) do { \
uint16_t d = (val); \
((uint8_t*)(p))[1] = (d); \
((uint8_t*)(p))[0] = (d)>>8; \
} while(0)
#endif
#ifndef AV_RL16
# define AV_RL16(x) \
((((const uint8_t*)(x))[1] << 8) | \
((const uint8_t*)(x))[0])
#endif
#ifndef AV_WL16
# define AV_WL16(p, val) do { \
uint16_t d = (val); \
((uint8_t*)(p))[0] = (d); \
((uint8_t*)(p))[1] = (d)>>8; \
} while(0)
#endif
#ifndef AV_RB32
# define AV_RB32(x) \
(((uint32_t)((const uint8_t*)(x))[0] << 24) | \
(((const uint8_t*)(x))[1] << 16) | \
(((const uint8_t*)(x))[2] << 8) | \
((const uint8_t*)(x))[3])
#endif
#ifndef AV_WB32
# define AV_WB32(p, val) do { \
uint32_t d = (val); \
((uint8_t*)(p))[3] = (d); \
((uint8_t*)(p))[2] = (d)>>8; \
((uint8_t*)(p))[1] = (d)>>16; \
((uint8_t*)(p))[0] = (d)>>24; \
} while(0)
#endif
#ifndef AV_RL32
# define AV_RL32(x) \
(((uint32_t)((const uint8_t*)(x))[3] << 24) | \
(((const uint8_t*)(x))[2] << 16) | \
(((const uint8_t*)(x))[1] << 8) | \
((const uint8_t*)(x))[0])
#endif
#ifndef AV_WL32
# define AV_WL32(p, val) do { \
uint32_t d = (val); \
((uint8_t*)(p))[0] = (d); \
((uint8_t*)(p))[1] = (d)>>8; \
((uint8_t*)(p))[2] = (d)>>16; \
((uint8_t*)(p))[3] = (d)>>24; \
} while(0)
#endif
#ifndef AV_RB64
# define AV_RB64(x) \
(((uint64_t)((const uint8_t*)(x))[0] << 56) | \
((uint64_t)((const uint8_t*)(x))[1] << 48) | \
((uint64_t)((const uint8_t*)(x))[2] << 40) | \
((uint64_t)((const uint8_t*)(x))[3] << 32) | \
((uint64_t)((const uint8_t*)(x))[4] << 24) | \
((uint64_t)((const uint8_t*)(x))[5] << 16) | \
((uint64_t)((const uint8_t*)(x))[6] << 8) | \
(uint64_t)((const uint8_t*)(x))[7])
#endif
#ifndef AV_WB64
# define AV_WB64(p, val) do { \
uint64_t d = (val); \
((uint8_t*)(p))[7] = (d); \
((uint8_t*)(p))[6] = (d)>>8; \
((uint8_t*)(p))[5] = (d)>>16; \
((uint8_t*)(p))[4] = (d)>>24; \
((uint8_t*)(p))[3] = (d)>>32; \
((uint8_t*)(p))[2] = (d)>>40; \
((uint8_t*)(p))[1] = (d)>>48; \
((uint8_t*)(p))[0] = (d)>>56; \
} while(0)
#endif
#ifndef AV_RL64
# define AV_RL64(x) \
(((uint64_t)((const uint8_t*)(x))[7] << 56) | \
((uint64_t)((const uint8_t*)(x))[6] << 48) | \
((uint64_t)((const uint8_t*)(x))[5] << 40) | \
((uint64_t)((const uint8_t*)(x))[4] << 32) | \
((uint64_t)((const uint8_t*)(x))[3] << 24) | \
((uint64_t)((const uint8_t*)(x))[2] << 16) | \
((uint64_t)((const uint8_t*)(x))[1] << 8) | \
(uint64_t)((const uint8_t*)(x))[0])
#endif
#ifndef AV_WL64
# define AV_WL64(p, val) do { \
uint64_t d = (val); \
((uint8_t*)(p))[0] = (d); \
((uint8_t*)(p))[1] = (d)>>8; \
((uint8_t*)(p))[2] = (d)>>16; \
((uint8_t*)(p))[3] = (d)>>24; \
((uint8_t*)(p))[4] = (d)>>32; \
((uint8_t*)(p))[5] = (d)>>40; \
((uint8_t*)(p))[6] = (d)>>48; \
((uint8_t*)(p))[7] = (d)>>56; \
} while(0)
#endif
#if AV_HAVE_BIGENDIAN
# define AV_RN(s, p) AV_RB##s(p)
# define AV_WN(s, p, v) AV_WB##s(p, v)
#else
# define AV_RN(s, p) AV_RL##s(p)
# define AV_WN(s, p, v) AV_WL##s(p, v)
#endif
#endif /* HAVE_FAST_UNALIGNED */
#ifndef AV_RN16
# define AV_RN16(p) AV_RN(16, p)
#endif
#ifndef AV_RN32
# define AV_RN32(p) AV_RN(32, p)
#endif
#ifndef AV_RN64
# define AV_RN64(p) AV_RN(64, p)
#endif
#ifndef AV_WN16
# define AV_WN16(p, v) AV_WN(16, p, v)
#endif
#ifndef AV_WN32
# define AV_WN32(p, v) AV_WN(32, p, v)
#endif
#ifndef AV_WN64
# define AV_WN64(p, v) AV_WN(64, p, v)
#endif
#if AV_HAVE_BIGENDIAN
# define AV_RB(s, p) AV_RN##s(p)
# define AV_WB(s, p, v) AV_WN##s(p, v)
# define AV_RL(s, p) av_bswap##s(AV_RN##s(p))
# define AV_WL(s, p, v) AV_WN##s(p, av_bswap##s(v))
#else
# define AV_RB(s, p) av_bswap##s(AV_RN##s(p))
# define AV_WB(s, p, v) AV_WN##s(p, av_bswap##s(v))
# define AV_RL(s, p) AV_RN##s(p)
# define AV_WL(s, p, v) AV_WN##s(p, v)
#endif
#define AV_RB8(x) (((const uint8_t*)(x))[0])
#define AV_WB8(p, d) do { ((uint8_t*)(p))[0] = (d); } while(0)
#define AV_RL8(x) AV_RB8(x)
#define AV_WL8(p, d) AV_WB8(p, d)
#ifndef AV_RB16
# define AV_RB16(p) AV_RB(16, p)
#endif
#ifndef AV_WB16
# define AV_WB16(p, v) AV_WB(16, p, v)
#endif
#ifndef AV_RL16
# define AV_RL16(p) AV_RL(16, p)
#endif
#ifndef AV_WL16
# define AV_WL16(p, v) AV_WL(16, p, v)
#endif
#ifndef AV_RB32
# define AV_RB32(p) AV_RB(32, p)
#endif
#ifndef AV_WB32
# define AV_WB32(p, v) AV_WB(32, p, v)
#endif
#ifndef AV_RL32
# define AV_RL32(p) AV_RL(32, p)
#endif
#ifndef AV_WL32
# define AV_WL32(p, v) AV_WL(32, p, v)
#endif
#ifndef AV_RB64
# define AV_RB64(p) AV_RB(64, p)
#endif
#ifndef AV_WB64
# define AV_WB64(p, v) AV_WB(64, p, v)
#endif
#ifndef AV_RL64
# define AV_RL64(p) AV_RL(64, p)
#endif
#ifndef AV_WL64
# define AV_WL64(p, v) AV_WL(64, p, v)
#endif
#ifndef AV_RB24
# define AV_RB24(x) \
((((const uint8_t*)(x))[0] << 16) | \
(((const uint8_t*)(x))[1] << 8) | \
((const uint8_t*)(x))[2])
#endif
#ifndef AV_WB24
# define AV_WB24(p, d) do { \
((uint8_t*)(p))[2] = (d); \
((uint8_t*)(p))[1] = (d)>>8; \
((uint8_t*)(p))[0] = (d)>>16; \
} while(0)
#endif
#ifndef AV_RL24
# define AV_RL24(x) \
((((const uint8_t*)(x))[2] << 16) | \
(((const uint8_t*)(x))[1] << 8) | \
((const uint8_t*)(x))[0])
#endif
#ifndef AV_WL24
# define AV_WL24(p, d) do { \
((uint8_t*)(p))[0] = (d); \
((uint8_t*)(p))[1] = (d)>>8; \
((uint8_t*)(p))[2] = (d)>>16; \
} while(0)
#endif
#ifndef AV_RB48
# define AV_RB48(x) \
(((uint64_t)((const uint8_t*)(x))[0] << 40) | \
((uint64_t)((const uint8_t*)(x))[1] << 32) | \
((uint64_t)((const uint8_t*)(x))[2] << 24) | \
((uint64_t)((const uint8_t*)(x))[3] << 16) | \
((uint64_t)((const uint8_t*)(x))[4] << 8) | \
(uint64_t)((const uint8_t*)(x))[5])
#endif
#ifndef AV_WB48
# define AV_WB48(p, darg) do { \
uint64_t d = (darg); \
((uint8_t*)(p))[5] = (d); \
((uint8_t*)(p))[4] = (d)>>8; \
((uint8_t*)(p))[3] = (d)>>16; \
((uint8_t*)(p))[2] = (d)>>24; \
((uint8_t*)(p))[1] = (d)>>32; \
((uint8_t*)(p))[0] = (d)>>40; \
} while(0)
#endif
#ifndef AV_RL48
# define AV_RL48(x) \
(((uint64_t)((const uint8_t*)(x))[5] << 40) | \
((uint64_t)((const uint8_t*)(x))[4] << 32) | \
((uint64_t)((const uint8_t*)(x))[3] << 24) | \
((uint64_t)((const uint8_t*)(x))[2] << 16) | \
((uint64_t)((const uint8_t*)(x))[1] << 8) | \
(uint64_t)((const uint8_t*)(x))[0])
#endif
#ifndef AV_WL48
# define AV_WL48(p, darg) do { \
uint64_t d = (darg); \
((uint8_t*)(p))[0] = (d); \
((uint8_t*)(p))[1] = (d)>>8; \
((uint8_t*)(p))[2] = (d)>>16; \
((uint8_t*)(p))[3] = (d)>>24; \
((uint8_t*)(p))[4] = (d)>>32; \
((uint8_t*)(p))[5] = (d)>>40; \
} while(0)
#endif
/*
* The AV_[RW]NA macros access naturally aligned data
* in a type-safe way.
*/
#define AV_RNA(s, p) (((const av_alias##s*)(p))->u##s)
#define AV_WNA(s, p, v) (((av_alias##s*)(p))->u##s = (v))
#ifndef AV_RN16A
# define AV_RN16A(p) AV_RNA(16, p)
#endif
#ifndef AV_RN32A
# define AV_RN32A(p) AV_RNA(32, p)
#endif
#ifndef AV_RN64A
# define AV_RN64A(p) AV_RNA(64, p)
#endif
#ifndef AV_WN16A
# define AV_WN16A(p, v) AV_WNA(16, p, v)
#endif
#ifndef AV_WN32A
# define AV_WN32A(p, v) AV_WNA(32, p, v)
#endif
#ifndef AV_WN64A
# define AV_WN64A(p, v) AV_WNA(64, p, v)
#endif
/*
* The AV_COPYxxU macros are suitable for copying data to/from unaligned
* memory locations.
*/
#define AV_COPYU(n, d, s) AV_WN##n(d, AV_RN##n(s));
#ifndef AV_COPY16U
# define AV_COPY16U(d, s) AV_COPYU(16, d, s)
#endif
#ifndef AV_COPY32U
# define AV_COPY32U(d, s) AV_COPYU(32, d, s)
#endif
#ifndef AV_COPY64U
# define AV_COPY64U(d, s) AV_COPYU(64, d, s)
#endif
#ifndef AV_COPY128U
# define AV_COPY128U(d, s) \
do { \
AV_COPY64U(d, s); \
AV_COPY64U((char *)(d) + 8, (const char *)(s) + 8); \
} while(0)
#endif
/* Parameters for AV_COPY*, AV_SWAP*, AV_ZERO* must be
* naturally aligned. They may be implemented using MMX,
* so emms_c() must be called before using any float code
* afterwards.
*/
#define AV_COPY(n, d, s) \
(((av_alias##n*)(d))->u##n = ((const av_alias##n*)(s))->u##n)
#ifndef AV_COPY16
# define AV_COPY16(d, s) AV_COPY(16, d, s)
#endif
#ifndef AV_COPY32
# define AV_COPY32(d, s) AV_COPY(32, d, s)
#endif
#ifndef AV_COPY64
# define AV_COPY64(d, s) AV_COPY(64, d, s)
#endif
#ifndef AV_COPY128
# define AV_COPY128(d, s) \
do { \
AV_COPY64(d, s); \
AV_COPY64((char*)(d)+8, (char*)(s)+8); \
} while(0)
#endif
#define AV_SWAP(n, a, b) FFSWAP(av_alias##n, *(av_alias##n*)(a), *(av_alias##n*)(b))
#ifndef AV_SWAP64
# define AV_SWAP64(a, b) AV_SWAP(64, a, b)
#endif
#define AV_ZERO(n, d) (((av_alias##n*)(d))->u##n = 0)
#ifndef AV_ZERO16
# define AV_ZERO16(d) AV_ZERO(16, d)
#endif
#ifndef AV_ZERO32
# define AV_ZERO32(d) AV_ZERO(32, d)
#endif
#ifndef AV_ZERO64
# define AV_ZERO64(d) AV_ZERO(64, d)
#endif
#ifndef AV_ZERO128
# define AV_ZERO128(d) \
do { \
AV_ZERO64(d); \
AV_ZERO64((char*)(d)+8); \
} while(0)
#endif
#endif /* AVUTIL_INTREADWRITE_H */

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/*
* Lagged Fibonacci PRNG
* Copyright (c) 2008 Michael Niedermayer
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_LFG_H
#define AVUTIL_LFG_H
#include <stdint.h>
typedef struct AVLFG {
unsigned int state[64];
int index;
} AVLFG;
void av_lfg_init(AVLFG *c, unsigned int seed);
/**
* Seed the state of the ALFG using binary data.
*
* Return value: 0 on success, negative value (AVERROR) on failure.
*/
int av_lfg_init_from_data(AVLFG *c, const uint8_t *data, unsigned int length);
/**
* Get the next random unsigned 32-bit number using an ALFG.
*
* Please also consider a simple LCG like state= state*1664525+1013904223,
* it may be good enough and faster for your specific use case.
*/
static inline unsigned int av_lfg_get(AVLFG *c){
c->state[c->index & 63] = c->state[(c->index-24) & 63] + c->state[(c->index-55) & 63];
return c->state[c->index++ & 63];
}
/**
* Get the next random unsigned 32-bit number using a MLFG.
*
* Please also consider av_lfg_get() above, it is faster.
*/
static inline unsigned int av_mlfg_get(AVLFG *c){
unsigned int a= c->state[(c->index-55) & 63];
unsigned int b= c->state[(c->index-24) & 63];
return c->state[c->index++ & 63] = 2*a*b+a+b;
}
/**
* Get the next two numbers generated by a Box-Muller Gaussian
* generator using the random numbers issued by lfg.
*
* @param out array where the two generated numbers are placed
*/
void av_bmg_get(AVLFG *lfg, double out[2]);
#endif /* AVUTIL_LFG_H */

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/*
* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_LOG_H
#define AVUTIL_LOG_H
#include <stdarg.h>
#include "avutil.h"
#include "attributes.h"
#include "version.h"
typedef enum {
AV_CLASS_CATEGORY_NA = 0,
AV_CLASS_CATEGORY_INPUT,
AV_CLASS_CATEGORY_OUTPUT,
AV_CLASS_CATEGORY_MUXER,
AV_CLASS_CATEGORY_DEMUXER,
AV_CLASS_CATEGORY_ENCODER,
AV_CLASS_CATEGORY_DECODER,
AV_CLASS_CATEGORY_FILTER,
AV_CLASS_CATEGORY_BITSTREAM_FILTER,
AV_CLASS_CATEGORY_SWSCALER,
AV_CLASS_CATEGORY_SWRESAMPLER,
AV_CLASS_CATEGORY_DEVICE_VIDEO_OUTPUT = 40,
AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT,
AV_CLASS_CATEGORY_DEVICE_AUDIO_OUTPUT,
AV_CLASS_CATEGORY_DEVICE_AUDIO_INPUT,
AV_CLASS_CATEGORY_DEVICE_OUTPUT,
AV_CLASS_CATEGORY_DEVICE_INPUT,
AV_CLASS_CATEGORY_NB ///< not part of ABI/API
}AVClassCategory;
#define AV_IS_INPUT_DEVICE(category) \
(((category) == AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT) || \
((category) == AV_CLASS_CATEGORY_DEVICE_AUDIO_INPUT) || \
((category) == AV_CLASS_CATEGORY_DEVICE_INPUT))
#define AV_IS_OUTPUT_DEVICE(category) \
(((category) == AV_CLASS_CATEGORY_DEVICE_VIDEO_OUTPUT) || \
((category) == AV_CLASS_CATEGORY_DEVICE_AUDIO_OUTPUT) || \
((category) == AV_CLASS_CATEGORY_DEVICE_OUTPUT))
struct AVOptionRanges;
/**
* Describe the class of an AVClass context structure. That is an
* arbitrary struct of which the first field is a pointer to an
* AVClass struct (e.g. AVCodecContext, AVFormatContext etc.).
*/
typedef struct AVClass {
/**
* The name of the class; usually it is the same name as the
* context structure type to which the AVClass is associated.
*/
const char* class_name;
/**
* A pointer to a function which returns the name of a context
* instance ctx associated with the class.
*/
const char* (*item_name)(void* ctx);
/**
* a pointer to the first option specified in the class if any or NULL
*
* @see av_set_default_options()
*/
const struct AVOption *option;
/**
* LIBAVUTIL_VERSION with which this structure was created.
* This is used to allow fields to be added without requiring major
* version bumps everywhere.
*/
int version;
/**
* Offset in the structure where log_level_offset is stored.
* 0 means there is no such variable
*/
int log_level_offset_offset;
/**
* Offset in the structure where a pointer to the parent context for
* logging is stored. For example a decoder could pass its AVCodecContext
* to eval as such a parent context, which an av_log() implementation
* could then leverage to display the parent context.
* The offset can be NULL.
*/
int parent_log_context_offset;
/**
* Return next AVOptions-enabled child or NULL
*/
void* (*child_next)(void *obj, void *prev);
/**
* Return an AVClass corresponding to the next potential
* AVOptions-enabled child.
*
* The difference between child_next and this is that
* child_next iterates over _already existing_ objects, while
* child_class_next iterates over _all possible_ children.
*/
const struct AVClass* (*child_class_next)(const struct AVClass *prev);
/**
* Category used for visualization (like color)
* This is only set if the category is equal for all objects using this class.
* available since version (51 << 16 | 56 << 8 | 100)
*/
AVClassCategory category;
/**
* Callback to return the category.
* available since version (51 << 16 | 59 << 8 | 100)
*/
AVClassCategory (*get_category)(void* ctx);
/**
* Callback to return the supported/allowed ranges.
* available since version (52.12)
*/
int (*query_ranges)(struct AVOptionRanges **, void *obj, const char *key, int flags);
} AVClass;
/**
* @addtogroup lavu_log
*
* @{
*
* @defgroup lavu_log_constants Logging Constants
*
* @{
*/
/**
* Print no output.
*/
#define AV_LOG_QUIET -8
/**
* Something went really wrong and we will crash now.
*/
#define AV_LOG_PANIC 0
/**
* Something went wrong and recovery is not possible.
* For example, no header was found for a format which depends
* on headers or an illegal combination of parameters is used.
*/
#define AV_LOG_FATAL 8
/**
* Something went wrong and cannot losslessly be recovered.
* However, not all future data is affected.
*/
#define AV_LOG_ERROR 16
/**
* Something somehow does not look correct. This may or may not
* lead to problems. An example would be the use of '-vstrict -2'.
*/
#define AV_LOG_WARNING 24
/**
* Standard information.
*/
#define AV_LOG_INFO 32
/**
* Detailed information.
*/
#define AV_LOG_VERBOSE 40
/**
* Stuff which is only useful for libav* developers.
*/
#define AV_LOG_DEBUG 48
/**
* Extremely verbose debugging, useful for libav* development.
*/
#define AV_LOG_TRACE 56
#define AV_LOG_MAX_OFFSET (AV_LOG_TRACE - AV_LOG_QUIET)
/**
* @}
*/
/**
* Sets additional colors for extended debugging sessions.
* @code
av_log(ctx, AV_LOG_DEBUG|AV_LOG_C(134), "Message in purple\n");
@endcode
* Requires 256color terminal support. Uses outside debugging is not
* recommended.
*/
#define AV_LOG_C(x) ((x) << 8)
/**
* Send the specified message to the log if the level is less than or equal
* to the current av_log_level. By default, all logging messages are sent to
* stderr. This behavior can be altered by setting a different logging callback
* function.
* @see av_log_set_callback
*
* @param avcl A pointer to an arbitrary struct of which the first field is a
* pointer to an AVClass struct or NULL if general log.
* @param level The importance level of the message expressed using a @ref
* lavu_log_constants "Logging Constant".
* @param fmt The format string (printf-compatible) that specifies how
* subsequent arguments are converted to output.
*/
void av_log(void *avcl, int level, const char *fmt, ...) av_printf_format(3, 4);
/**
* Send the specified message to the log if the level is less than or equal
* to the current av_log_level. By default, all logging messages are sent to
* stderr. This behavior can be altered by setting a different logging callback
* function.
* @see av_log_set_callback
*
* @param avcl A pointer to an arbitrary struct of which the first field is a
* pointer to an AVClass struct.
* @param level The importance level of the message expressed using a @ref
* lavu_log_constants "Logging Constant".
* @param fmt The format string (printf-compatible) that specifies how
* subsequent arguments are converted to output.
* @param vl The arguments referenced by the format string.
*/
void av_vlog(void *avcl, int level, const char *fmt, va_list vl);
/**
* Get the current log level
*
* @see lavu_log_constants
*
* @return Current log level
*/
int av_log_get_level(void);
/**
* Set the log level
*
* @see lavu_log_constants
*
* @param level Logging level
*/
void av_log_set_level(int level);
/**
* Set the logging callback
*
* @note The callback must be thread safe, even if the application does not use
* threads itself as some codecs are multithreaded.
*
* @see av_log_default_callback
*
* @param callback A logging function with a compatible signature.
*/
void av_log_set_callback(void (*callback)(void*, int, const char*, va_list));
/**
* Default logging callback
*
* It prints the message to stderr, optionally colorizing it.
*
* @param avcl A pointer to an arbitrary struct of which the first field is a
* pointer to an AVClass struct.
* @param level The importance level of the message expressed using a @ref
* lavu_log_constants "Logging Constant".
* @param fmt The format string (printf-compatible) that specifies how
* subsequent arguments are converted to output.
* @param vl The arguments referenced by the format string.
*/
void av_log_default_callback(void *avcl, int level, const char *fmt,
va_list vl);
/**
* Return the context name
*
* @param ctx The AVClass context
*
* @return The AVClass class_name
*/
const char* av_default_item_name(void* ctx);
AVClassCategory av_default_get_category(void *ptr);
/**
* Format a line of log the same way as the default callback.
* @param line buffer to receive the formatted line
* @param line_size size of the buffer
* @param print_prefix used to store whether the prefix must be printed;
* must point to a persistent integer initially set to 1
*/
void av_log_format_line(void *ptr, int level, const char *fmt, va_list vl,
char *line, int line_size, int *print_prefix);
/**
* Format a line of log the same way as the default callback.
* @param line buffer to receive the formatted line;
* may be NULL if line_size is 0
* @param line_size size of the buffer; at most line_size-1 characters will
* be written to the buffer, plus one null terminator
* @param print_prefix used to store whether the prefix must be printed;
* must point to a persistent integer initially set to 1
* @return Returns a negative value if an error occurred, otherwise returns
* the number of characters that would have been written for a
* sufficiently large buffer, not including the terminating null
* character. If the return value is not less than line_size, it means
* that the log message was truncated to fit the buffer.
*/
int av_log_format_line2(void *ptr, int level, const char *fmt, va_list vl,
char *line, int line_size, int *print_prefix);
#if FF_API_DLOG
/**
* av_dlog macros
* @deprecated unused
* Useful to print debug messages that shouldn't get compiled in normally.
*/
#ifdef DEBUG
# define av_dlog(pctx, ...) av_log(pctx, AV_LOG_DEBUG, __VA_ARGS__)
#else
# define av_dlog(pctx, ...) do { if (0) av_log(pctx, AV_LOG_DEBUG, __VA_ARGS__); } while (0)
#endif
#endif /* FF_API_DLOG */
/**
* Skip repeated messages, this requires the user app to use av_log() instead of
* (f)printf as the 2 would otherwise interfere and lead to
* "Last message repeated x times" messages below (f)printf messages with some
* bad luck.
* Also to receive the last, "last repeated" line if any, the user app must
* call av_log(NULL, AV_LOG_QUIET, "%s", ""); at the end
*/
#define AV_LOG_SKIP_REPEATED 1
/**
* Include the log severity in messages originating from codecs.
*
* Results in messages such as:
* [rawvideo @ 0xDEADBEEF] [error] encode did not produce valid pts
*/
#define AV_LOG_PRINT_LEVEL 2
void av_log_set_flags(int arg);
int av_log_get_flags(void);
/**
* @}
*/
#endif /* AVUTIL_LOG_H */

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/*
* LZO 1x decompression
* copyright (c) 2006 Reimar Doeffinger
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_LZO_H
#define AVUTIL_LZO_H
/**
* @defgroup lavu_lzo LZO
* @ingroup lavu_crypto
*
* @{
*/
#include <stdint.h>
/** @name Error flags returned by av_lzo1x_decode
* @{ */
/// end of the input buffer reached before decoding finished
#define AV_LZO_INPUT_DEPLETED 1
/// decoded data did not fit into output buffer
#define AV_LZO_OUTPUT_FULL 2
/// a reference to previously decoded data was wrong
#define AV_LZO_INVALID_BACKPTR 4
/// a non-specific error in the compressed bitstream
#define AV_LZO_ERROR 8
/** @} */
#define AV_LZO_INPUT_PADDING 8
#define AV_LZO_OUTPUT_PADDING 12
/**
* @brief Decodes LZO 1x compressed data.
* @param out output buffer
* @param outlen size of output buffer, number of bytes left are returned here
* @param in input buffer
* @param inlen size of input buffer, number of bytes left are returned here
* @return 0 on success, otherwise a combination of the error flags above
*
* Make sure all buffers are appropriately padded, in must provide
* AV_LZO_INPUT_PADDING, out must provide AV_LZO_OUTPUT_PADDING additional bytes.
*/
int av_lzo1x_decode(void *out, int *outlen, const void *in, int *inlen);
/**
* @}
*/
#endif /* AVUTIL_LZO_H */

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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* @ingroup lavu
* Utility Preprocessor macros
*/
#ifndef AVUTIL_MACROS_H
#define AVUTIL_MACROS_H
/**
* @addtogroup preproc_misc Preprocessor String Macros
*
* String manipulation macros
*
* @{
*/
#define AV_STRINGIFY(s) AV_TOSTRING(s)
#define AV_TOSTRING(s) #s
#define AV_GLUE(a, b) a ## b
#define AV_JOIN(a, b) AV_GLUE(a, b)
/**
* @}
*/
#define AV_PRAGMA(s) _Pragma(#s)
#define FFALIGN(x, a) (((x)+(a)-1)&~((a)-1))
#endif /* AVUTIL_MACROS_H */

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/**
* Copyright (c) 2016 Neil Birkbeck <neil.birkbeck@gmail.com>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_MASTERING_DISPLAY_METADATA_H
#define AVUTIL_MASTERING_DISPLAY_METADATA_H
#include "frame.h"
#include "rational.h"
/**
* Mastering display metadata capable of representing the color volume of
* the display used to master the content (SMPTE 2086:2014).
*
* To be used as payload of a AVFrameSideData or AVPacketSideData with the
* appropriate type.
*
* @note The struct should be allocated with av_mastering_display_metadata_alloc()
* and its size is not a part of the public ABI.
*/
typedef struct AVMasteringDisplayMetadata {
/**
* CIE 1931 xy chromaticity coords of color primaries (r, g, b order).
*/
AVRational display_primaries[3][2];
/**
* CIE 1931 xy chromaticity coords of white point.
*/
AVRational white_point[2];
/**
* Min luminance of mastering display (cd/m^2).
*/
AVRational min_luminance;
/**
* Max luminance of mastering display (cd/m^2).
*/
AVRational max_luminance;
/**
* Flag indicating whether the display primaries (and white point) are set.
*/
int has_primaries;
/**
* Flag indicating whether the luminance (min_ and max_) have been set.
*/
int has_luminance;
} AVMasteringDisplayMetadata;
/**
* Allocate an AVMasteringDisplayMetadata structure and set its fields to
* default values. The resulting struct can be freed using av_freep().
*
* @return An AVMasteringDisplayMetadata filled with default values or NULL
* on failure.
*/
AVMasteringDisplayMetadata *av_mastering_display_metadata_alloc(void);
/**
* Allocate a complete AVMasteringDisplayMetadata and add it to the frame.
*
* @param frame The frame which side data is added to.
*
* @return The AVMasteringDisplayMetadata structure to be filled by caller.
*/
AVMasteringDisplayMetadata *av_mastering_display_metadata_create_side_data(AVFrame *frame);
/**
* Content light level needed by to transmit HDR over HDMI (CTA-861.3).
*
* To be used as payload of a AVFrameSideData or AVPacketSideData with the
* appropriate type.
*
* @note The struct should be allocated with av_content_light_metadata_alloc()
* and its size is not a part of the public ABI.
*/
typedef struct AVContentLightMetadata {
/**
* Max content light level (cd/m^2).
*/
unsigned MaxCLL;
/**
* Max average light level per frame (cd/m^2).
*/
unsigned MaxFALL;
} AVContentLightMetadata;
/**
* Allocate an AVContentLightMetadata structure and set its fields to
* default values. The resulting struct can be freed using av_freep().
*
* @return An AVContentLightMetadata filled with default values or NULL
* on failure.
*/
AVContentLightMetadata *av_content_light_metadata_alloc(size_t *size);
/**
* Allocate a complete AVContentLightMetadata and add it to the frame.
*
* @param frame The frame which side data is added to.
*
* @return The AVContentLightMetadata structure to be filled by caller.
*/
AVContentLightMetadata *av_content_light_metadata_create_side_data(AVFrame *frame);
#endif /* AVUTIL_MASTERING_DISPLAY_METADATA_H */

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/*
* copyright (c) 2005-2012 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* @addtogroup lavu_math
* Mathematical utilities for working with timestamp and time base.
*/
#ifndef AVUTIL_MATHEMATICS_H
#define AVUTIL_MATHEMATICS_H
#include <stdint.h>
#include <math.h>
#include "attributes.h"
#include "rational.h"
#include "intfloat.h"
#ifndef M_E
#define M_E 2.7182818284590452354 /* e */
#endif
#ifndef M_LN2
#define M_LN2 0.69314718055994530942 /* log_e 2 */
#endif
#ifndef M_LN10
#define M_LN10 2.30258509299404568402 /* log_e 10 */
#endif
#ifndef M_LOG2_10
#define M_LOG2_10 3.32192809488736234787 /* log_2 10 */
#endif
#ifndef M_PHI
#define M_PHI 1.61803398874989484820 /* phi / golden ratio */
#endif
#ifndef M_PI
#define M_PI 3.14159265358979323846 /* pi */
#endif
#ifndef M_PI_2
#define M_PI_2 1.57079632679489661923 /* pi/2 */
#endif
#ifndef M_SQRT1_2
#define M_SQRT1_2 0.70710678118654752440 /* 1/sqrt(2) */
#endif
#ifndef M_SQRT2
#define M_SQRT2 1.41421356237309504880 /* sqrt(2) */
#endif
#ifndef NAN
#define NAN av_int2float(0x7fc00000)
#endif
#ifndef INFINITY
#define INFINITY av_int2float(0x7f800000)
#endif
/**
* @addtogroup lavu_math
*
* @{
*/
/**
* Rounding methods.
*/
enum AVRounding {
AV_ROUND_ZERO = 0, ///< Round toward zero.
AV_ROUND_INF = 1, ///< Round away from zero.
AV_ROUND_DOWN = 2, ///< Round toward -infinity.
AV_ROUND_UP = 3, ///< Round toward +infinity.
AV_ROUND_NEAR_INF = 5, ///< Round to nearest and halfway cases away from zero.
/**
* Flag telling rescaling functions to pass `INT64_MIN`/`MAX` through
* unchanged, avoiding special cases for #AV_NOPTS_VALUE.
*
* Unlike other values of the enumeration AVRounding, this value is a
* bitmask that must be used in conjunction with another value of the
* enumeration through a bitwise OR, in order to set behavior for normal
* cases.
*
* @code{.c}
* av_rescale_rnd(3, 1, 2, AV_ROUND_UP | AV_ROUND_PASS_MINMAX);
* // Rescaling 3:
* // Calculating 3 * 1 / 2
* // 3 / 2 is rounded up to 2
* // => 2
*
* av_rescale_rnd(AV_NOPTS_VALUE, 1, 2, AV_ROUND_UP | AV_ROUND_PASS_MINMAX);
* // Rescaling AV_NOPTS_VALUE:
* // AV_NOPTS_VALUE == INT64_MIN
* // AV_NOPTS_VALUE is passed through
* // => AV_NOPTS_VALUE
* @endcode
*/
AV_ROUND_PASS_MINMAX = 8192,
};
/**
* Compute the greatest common divisor of two integer operands.
*
* @param a,b Operands
* @return GCD of a and b up to sign; if a >= 0 and b >= 0, return value is >= 0;
* if a == 0 and b == 0, returns 0.
*/
int64_t av_const av_gcd(int64_t a, int64_t b);
/**
* Rescale a 64-bit integer with rounding to nearest.
*
* The operation is mathematically equivalent to `a * b / c`, but writing that
* directly can overflow.
*
* This function is equivalent to av_rescale_rnd() with #AV_ROUND_NEAR_INF.
*
* @see av_rescale_rnd(), av_rescale_q(), av_rescale_q_rnd()
*/
int64_t av_rescale(int64_t a, int64_t b, int64_t c) av_const;
/**
* Rescale a 64-bit integer with specified rounding.
*
* The operation is mathematically equivalent to `a * b / c`, but writing that
* directly can overflow, and does not support different rounding methods.
*
* @see av_rescale(), av_rescale_q(), av_rescale_q_rnd()
*/
int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding rnd) av_const;
/**
* Rescale a 64-bit integer by 2 rational numbers.
*
* The operation is mathematically equivalent to `a * bq / cq`.
*
* This function is equivalent to av_rescale_q_rnd() with #AV_ROUND_NEAR_INF.
*
* @see av_rescale(), av_rescale_rnd(), av_rescale_q_rnd()
*/
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq) av_const;
/**
* Rescale a 64-bit integer by 2 rational numbers with specified rounding.
*
* The operation is mathematically equivalent to `a * bq / cq`.
*
* @see av_rescale(), av_rescale_rnd(), av_rescale_q()
*/
int64_t av_rescale_q_rnd(int64_t a, AVRational bq, AVRational cq,
enum AVRounding rnd) av_const;
/**
* Compare two timestamps each in its own time base.
*
* @return One of the following values:
* - -1 if `ts_a` is before `ts_b`
* - 1 if `ts_a` is after `ts_b`
* - 0 if they represent the same position
*
* @warning
* The result of the function is undefined if one of the timestamps is outside
* the `int64_t` range when represented in the other's timebase.
*/
int av_compare_ts(int64_t ts_a, AVRational tb_a, int64_t ts_b, AVRational tb_b);
/**
* Compare the remainders of two integer operands divided by a common divisor.
*
* In other words, compare the least significant `log2(mod)` bits of integers
* `a` and `b`.
*
* @code{.c}
* av_compare_mod(0x11, 0x02, 0x10) < 0 // since 0x11 % 0x10 (0x1) < 0x02 % 0x10 (0x2)
* av_compare_mod(0x11, 0x02, 0x20) > 0 // since 0x11 % 0x20 (0x11) > 0x02 % 0x20 (0x02)
* @endcode
*
* @param a,b Operands
* @param mod Divisor; must be a power of 2
* @return
* - a negative value if `a % mod < b % mod`
* - a positive value if `a % mod > b % mod`
* - zero if `a % mod == b % mod`
*/
int64_t av_compare_mod(uint64_t a, uint64_t b, uint64_t mod);
/**
* Rescale a timestamp while preserving known durations.
*
* This function is designed to be called per audio packet to scale the input
* timestamp to a different time base. Compared to a simple av_rescale_q()
* call, this function is robust against possible inconsistent frame durations.
*
* The `last` parameter is a state variable that must be preserved for all
* subsequent calls for the same stream. For the first call, `*last` should be
* initialized to #AV_NOPTS_VALUE.
*
* @param[in] in_tb Input time base
* @param[in] in_ts Input timestamp
* @param[in] fs_tb Duration time base; typically this is finer-grained
* (greater) than `in_tb` and `out_tb`
* @param[in] duration Duration till the next call to this function (i.e.
* duration of the current packet/frame)
* @param[in,out] last Pointer to a timestamp expressed in terms of
* `fs_tb`, acting as a state variable
* @param[in] out_tb Output timebase
* @return Timestamp expressed in terms of `out_tb`
*
* @note In the context of this function, "duration" is in term of samples, not
* seconds.
*/
int64_t av_rescale_delta(AVRational in_tb, int64_t in_ts, AVRational fs_tb, int duration, int64_t *last, AVRational out_tb);
/**
* Add a value to a timestamp.
*
* This function guarantees that when the same value is repeatly added that
* no accumulation of rounding errors occurs.
*
* @param[in] ts Input timestamp
* @param[in] ts_tb Input timestamp time base
* @param[in] inc Value to be added
* @param[in] inc_tb Time base of `inc`
*/
int64_t av_add_stable(AVRational ts_tb, int64_t ts, AVRational inc_tb, int64_t inc);
/**
* @}
*/
#endif /* AVUTIL_MATHEMATICS_H */

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/*
* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* @ingroup lavu_md5
* Public header for MD5 hash function implementation.
*/
#ifndef AVUTIL_MD5_H
#define AVUTIL_MD5_H
#include <stddef.h>
#include <stdint.h>
#include "attributes.h"
#include "version.h"
/**
* @defgroup lavu_md5 MD5
* @ingroup lavu_hash
* MD5 hash function implementation.
*
* @{
*/
extern const int av_md5_size;
struct AVMD5;
/**
* Allocate an AVMD5 context.
*/
struct AVMD5 *av_md5_alloc(void);
/**
* Initialize MD5 hashing.
*
* @param ctx pointer to the function context (of size av_md5_size)
*/
void av_md5_init(struct AVMD5 *ctx);
/**
* Update hash value.
*
* @param ctx hash function context
* @param src input data to update hash with
* @param len input data length
*/
#if FF_API_CRYPTO_SIZE_T
void av_md5_update(struct AVMD5 *ctx, const uint8_t *src, int len);
#else
void av_md5_update(struct AVMD5 *ctx, const uint8_t *src, size_t len);
#endif
/**
* Finish hashing and output digest value.
*
* @param ctx hash function context
* @param dst buffer where output digest value is stored
*/
void av_md5_final(struct AVMD5 *ctx, uint8_t *dst);
/**
* Hash an array of data.
*
* @param dst The output buffer to write the digest into
* @param src The data to hash
* @param len The length of the data, in bytes
*/
#if FF_API_CRYPTO_SIZE_T
void av_md5_sum(uint8_t *dst, const uint8_t *src, const int len);
#else
void av_md5_sum(uint8_t *dst, const uint8_t *src, size_t len);
#endif
/**
* @}
*/
#endif /* AVUTIL_MD5_H */

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/*
* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* @ingroup lavu_mem
* Memory handling functions
*/
#ifndef AVUTIL_MEM_H
#define AVUTIL_MEM_H
#include <limits.h>
#include <stdint.h>
#include "attributes.h"
#include "error.h"
#include "avutil.h"
/**
* @addtogroup lavu_mem
* Utilities for manipulating memory.
*
* FFmpeg has several applications of memory that are not required of a typical
* program. For example, the computing-heavy components like video decoding and
* encoding can be sped up significantly through the use of aligned memory.
*
* However, for each of FFmpeg's applications of memory, there might not be a
* recognized or standardized API for that specific use. Memory alignment, for
* instance, varies wildly depending on operating systems, architectures, and
* compilers. Hence, this component of @ref libavutil is created to make
* dealing with memory consistently possible on all platforms.
*
* @{
*
* @defgroup lavu_mem_macros Alignment Macros
* Helper macros for declaring aligned variables.
* @{
*/
/**
* @def DECLARE_ALIGNED(n,t,v)
* Declare a variable that is aligned in memory.
*
* @code{.c}
* DECLARE_ALIGNED(16, uint16_t, aligned_int) = 42;
* DECLARE_ALIGNED(32, uint8_t, aligned_array)[128];
*
* // The default-alignment equivalent would be
* uint16_t aligned_int = 42;
* uint8_t aligned_array[128];
* @endcode
*
* @param n Minimum alignment in bytes
* @param t Type of the variable (or array element)
* @param v Name of the variable
*/
/**
* @def DECLARE_ASM_CONST(n,t,v)
* Declare a static constant aligned variable appropriate for use in inline
* assembly code.
*
* @code{.c}
* DECLARE_ASM_CONST(16, uint64_t, pw_08) = UINT64_C(0x0008000800080008);
* @endcode
*
* @param n Minimum alignment in bytes
* @param t Type of the variable (or array element)
* @param v Name of the variable
*/
#if defined(__INTEL_COMPILER) && __INTEL_COMPILER < 1110 || defined(__SUNPRO_C)
#define DECLARE_ALIGNED(n,t,v) t __attribute__ ((aligned (n))) v
#define DECLARE_ASM_CONST(n,t,v) const t __attribute__ ((aligned (n))) v
#elif defined(__TI_COMPILER_VERSION__)
#define DECLARE_ALIGNED(n,t,v) \
AV_PRAGMA(DATA_ALIGN(v,n)) \
t __attribute__((aligned(n))) v
#define DECLARE_ASM_CONST(n,t,v) \
AV_PRAGMA(DATA_ALIGN(v,n)) \
static const t __attribute__((aligned(n))) v
#elif defined(__DJGPP__)
#define DECLARE_ALIGNED(n,t,v) t __attribute__ ((aligned (FFMIN(n, 16)))) v
#define DECLARE_ASM_CONST(n,t,v) static const t av_used __attribute__ ((aligned (FFMIN(n, 16)))) v
#elif defined(__GNUC__) || defined(__clang__)
#define DECLARE_ALIGNED(n,t,v) t __attribute__ ((aligned (n))) v
#define DECLARE_ASM_CONST(n,t,v) static const t av_used __attribute__ ((aligned (n))) v
#elif defined(_MSC_VER)
#define DECLARE_ALIGNED(n,t,v) __declspec(align(n)) t v
#define DECLARE_ASM_CONST(n,t,v) __declspec(align(n)) static const t v
#else
#define DECLARE_ALIGNED(n,t,v) t v
#define DECLARE_ASM_CONST(n,t,v) static const t v
#endif
/**
* @}
*/
/**
* @defgroup lavu_mem_attrs Function Attributes
* Function attributes applicable to memory handling functions.
*
* These function attributes can help compilers emit more useful warnings, or
* generate better code.
* @{
*/
/**
* @def av_malloc_attrib
* Function attribute denoting a malloc-like function.
*
* @see <a href="https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-g_t_0040code_007bmalloc_007d-function-attribute-3251">Function attribute `malloc` in GCC's documentation</a>
*/
#if AV_GCC_VERSION_AT_LEAST(3,1)
#define av_malloc_attrib __attribute__((__malloc__))
#else
#define av_malloc_attrib
#endif
/**
* @def av_alloc_size(...)
* Function attribute used on a function that allocates memory, whose size is
* given by the specified parameter(s).
*
* @code{.c}
* void *av_malloc(size_t size) av_alloc_size(1);
* void *av_calloc(size_t nmemb, size_t size) av_alloc_size(1, 2);
* @endcode
*
* @param ... One or two parameter indexes, separated by a comma
*
* @see <a href="https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-g_t_0040code_007balloc_005fsize_007d-function-attribute-3220">Function attribute `alloc_size` in GCC's documentation</a>
*/
#if AV_GCC_VERSION_AT_LEAST(4,3)
#define av_alloc_size(...) __attribute__((alloc_size(__VA_ARGS__)))
#else
#define av_alloc_size(...)
#endif
/**
* @}
*/
/**
* @defgroup lavu_mem_funcs Heap Management
* Functions responsible for allocating, freeing, and copying memory.
*
* All memory allocation functions have a built-in upper limit of `INT_MAX`
* bytes. This may be changed with av_max_alloc(), although exercise extreme
* caution when doing so.
*
* @{
*/
/**
* Allocate a memory block with alignment suitable for all memory accesses
* (including vectors if available on the CPU).
*
* @param size Size in bytes for the memory block to be allocated
* @return Pointer to the allocated block, or `NULL` if the block cannot
* be allocated
* @see av_mallocz()
*/
void *av_malloc(size_t size) av_malloc_attrib av_alloc_size(1);
/**
* Allocate a memory block with alignment suitable for all memory accesses
* (including vectors if available on the CPU) and zero all the bytes of the
* block.
*
* @param size Size in bytes for the memory block to be allocated
* @return Pointer to the allocated block, or `NULL` if it cannot be allocated
* @see av_malloc()
*/
void *av_mallocz(size_t size) av_malloc_attrib av_alloc_size(1);
/**
* Allocate a memory block for an array with av_malloc().
*
* The allocated memory will have size `size * nmemb` bytes.
*
* @param nmemb Number of element
* @param size Size of a single element
* @return Pointer to the allocated block, or `NULL` if the block cannot
* be allocated
* @see av_malloc()
*/
av_alloc_size(1, 2) static inline void *av_malloc_array(size_t nmemb, size_t size)
{
if (!size || nmemb >= INT_MAX / size)
return NULL;
return av_malloc(nmemb * size);
}
/**
* Allocate a memory block for an array with av_mallocz().
*
* The allocated memory will have size `size * nmemb` bytes.
*
* @param nmemb Number of elements
* @param size Size of the single element
* @return Pointer to the allocated block, or `NULL` if the block cannot
* be allocated
*
* @see av_mallocz()
* @see av_malloc_array()
*/
av_alloc_size(1, 2) static inline void *av_mallocz_array(size_t nmemb, size_t size)
{
if (!size || nmemb >= INT_MAX / size)
return NULL;
return av_mallocz(nmemb * size);
}
/**
* Non-inlined equivalent of av_mallocz_array().
*
* Created for symmetry with the calloc() C function.
*/
void *av_calloc(size_t nmemb, size_t size) av_malloc_attrib;
/**
* Allocate, reallocate, or free a block of memory.
*
* If `ptr` is `NULL` and `size` > 0, allocate a new block. If `size` is
* zero, free the memory block pointed to by `ptr`. Otherwise, expand or
* shrink that block of memory according to `size`.
*
* @param ptr Pointer to a memory block already allocated with
* av_realloc() or `NULL`
* @param size Size in bytes of the memory block to be allocated or
* reallocated
*
* @return Pointer to a newly-reallocated block or `NULL` if the block
* cannot be reallocated or the function is used to free the memory block
*
* @warning Unlike av_malloc(), the returned pointer is not guaranteed to be
* correctly aligned.
* @see av_fast_realloc()
* @see av_reallocp()
*/
void *av_realloc(void *ptr, size_t size) av_alloc_size(2);
/**
* Allocate, reallocate, or free a block of memory through a pointer to a
* pointer.
*
* If `*ptr` is `NULL` and `size` > 0, allocate a new block. If `size` is
* zero, free the memory block pointed to by `*ptr`. Otherwise, expand or
* shrink that block of memory according to `size`.
*
* @param[in,out] ptr Pointer to a pointer to a memory block already allocated
* with av_realloc(), or a pointer to `NULL`. The pointer
* is updated on success, or freed on failure.
* @param[in] size Size in bytes for the memory block to be allocated or
* reallocated
*
* @return Zero on success, an AVERROR error code on failure
*
* @warning Unlike av_malloc(), the allocated memory is not guaranteed to be
* correctly aligned.
*/
av_warn_unused_result
int av_reallocp(void *ptr, size_t size);
/**
* Allocate, reallocate, or free a block of memory.
*
* This function does the same thing as av_realloc(), except:
* - It takes two size arguments and allocates `nelem * elsize` bytes,
* after checking the result of the multiplication for integer overflow.
* - It frees the input block in case of failure, thus avoiding the memory
* leak with the classic
* @code{.c}
* buf = realloc(buf);
* if (!buf)
* return -1;
* @endcode
* pattern.
*/
void *av_realloc_f(void *ptr, size_t nelem, size_t elsize);
/**
* Allocate, reallocate, or free an array.
*
* If `ptr` is `NULL` and `nmemb` > 0, allocate a new block. If
* `nmemb` is zero, free the memory block pointed to by `ptr`.
*
* @param ptr Pointer to a memory block already allocated with
* av_realloc() or `NULL`
* @param nmemb Number of elements in the array
* @param size Size of the single element of the array
*
* @return Pointer to a newly-reallocated block or NULL if the block
* cannot be reallocated or the function is used to free the memory block
*
* @warning Unlike av_malloc(), the allocated memory is not guaranteed to be
* correctly aligned.
* @see av_reallocp_array()
*/
av_alloc_size(2, 3) void *av_realloc_array(void *ptr, size_t nmemb, size_t size);
/**
* Allocate, reallocate, or free an array through a pointer to a pointer.
*
* If `*ptr` is `NULL` and `nmemb` > 0, allocate a new block. If `nmemb` is
* zero, free the memory block pointed to by `*ptr`.
*
* @param[in,out] ptr Pointer to a pointer to a memory block already
* allocated with av_realloc(), or a pointer to `NULL`.
* The pointer is updated on success, or freed on failure.
* @param[in] nmemb Number of elements
* @param[in] size Size of the single element
*
* @return Zero on success, an AVERROR error code on failure
*
* @warning Unlike av_malloc(), the allocated memory is not guaranteed to be
* correctly aligned.
*/
av_alloc_size(2, 3) int av_reallocp_array(void *ptr, size_t nmemb, size_t size);
/**
* Reallocate the given buffer if it is not large enough, otherwise do nothing.
*
* If the given buffer is `NULL`, then a new uninitialized buffer is allocated.
*
* If the given buffer is not large enough, and reallocation fails, `NULL` is
* returned and `*size` is set to 0, but the original buffer is not changed or
* freed.
*
* A typical use pattern follows:
*
* @code{.c}
* uint8_t *buf = ...;
* uint8_t *new_buf = av_fast_realloc(buf, &current_size, size_needed);
* if (!new_buf) {
* // Allocation failed; clean up original buffer
* av_freep(&buf);
* return AVERROR(ENOMEM);
* }
* @endcode
*
* @param[in,out] ptr Already allocated buffer, or `NULL`
* @param[in,out] size Pointer to current size of buffer `ptr`. `*size` is
* changed to `min_size` in case of success or 0 in
* case of failure
* @param[in] min_size New size of buffer `ptr`
* @return `ptr` if the buffer is large enough, a pointer to newly reallocated
* buffer if the buffer was not large enough, or `NULL` in case of
* error
* @see av_realloc()
* @see av_fast_malloc()
*/
void *av_fast_realloc(void *ptr, unsigned int *size, size_t min_size);
/**
* Allocate a buffer, reusing the given one if large enough.
*
* Contrary to av_fast_realloc(), the current buffer contents might not be
* preserved and on error the old buffer is freed, thus no special handling to
* avoid memleaks is necessary.
*
* `*ptr` is allowed to be `NULL`, in which case allocation always happens if
* `size_needed` is greater than 0.
*
* @code{.c}
* uint8_t *buf = ...;
* av_fast_malloc(&buf, &current_size, size_needed);
* if (!buf) {
* // Allocation failed; buf already freed
* return AVERROR(ENOMEM);
* }
* @endcode
*
* @param[in,out] ptr Pointer to pointer to an already allocated buffer.
* `*ptr` will be overwritten with pointer to new
* buffer on success or `NULL` on failure
* @param[in,out] size Pointer to current size of buffer `*ptr`. `*size` is
* changed to `min_size` in case of success or 0 in
* case of failure
* @param[in] min_size New size of buffer `*ptr`
* @see av_realloc()
* @see av_fast_mallocz()
*/
void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size);
/**
* Allocate and clear a buffer, reusing the given one if large enough.
*
* Like av_fast_malloc(), but all newly allocated space is initially cleared.
* Reused buffer is not cleared.
*
* `*ptr` is allowed to be `NULL`, in which case allocation always happens if
* `size_needed` is greater than 0.
*
* @param[in,out] ptr Pointer to pointer to an already allocated buffer.
* `*ptr` will be overwritten with pointer to new
* buffer on success or `NULL` on failure
* @param[in,out] size Pointer to current size of buffer `*ptr`. `*size` is
* changed to `min_size` in case of success or 0 in
* case of failure
* @param[in] min_size New size of buffer `*ptr`
* @see av_fast_malloc()
*/
void av_fast_mallocz(void *ptr, unsigned int *size, size_t min_size);
/**
* Free a memory block which has been allocated with a function of av_malloc()
* or av_realloc() family.
*
* @param ptr Pointer to the memory block which should be freed.
*
* @note `ptr = NULL` is explicitly allowed.
* @note It is recommended that you use av_freep() instead, to prevent leaving
* behind dangling pointers.
* @see av_freep()
*/
void av_free(void *ptr);
/**
* Free a memory block which has been allocated with a function of av_malloc()
* or av_realloc() family, and set the pointer pointing to it to `NULL`.
*
* @code{.c}
* uint8_t *buf = av_malloc(16);
* av_free(buf);
* // buf now contains a dangling pointer to freed memory, and accidental
* // dereference of buf will result in a use-after-free, which may be a
* // security risk.
*
* uint8_t *buf = av_malloc(16);
* av_freep(&buf);
* // buf is now NULL, and accidental dereference will only result in a
* // NULL-pointer dereference.
* @endcode
*
* @param ptr Pointer to the pointer to the memory block which should be freed
* @note `*ptr = NULL` is safe and leads to no action.
* @see av_free()
*/
void av_freep(void *ptr);
/**
* Duplicate a string.
*
* @param s String to be duplicated
* @return Pointer to a newly-allocated string containing a
* copy of `s` or `NULL` if the string cannot be allocated
* @see av_strndup()
*/
char *av_strdup(const char *s) av_malloc_attrib;
/**
* Duplicate a substring of a string.
*
* @param s String to be duplicated
* @param len Maximum length of the resulting string (not counting the
* terminating byte)
* @return Pointer to a newly-allocated string containing a
* substring of `s` or `NULL` if the string cannot be allocated
*/
char *av_strndup(const char *s, size_t len) av_malloc_attrib;
/**
* Duplicate a buffer with av_malloc().
*
* @param p Buffer to be duplicated
* @param size Size in bytes of the buffer copied
* @return Pointer to a newly allocated buffer containing a
* copy of `p` or `NULL` if the buffer cannot be allocated
*/
void *av_memdup(const void *p, size_t size);
/**
* Overlapping memcpy() implementation.
*
* @param dst Destination buffer
* @param back Number of bytes back to start copying (i.e. the initial size of
* the overlapping window); must be > 0
* @param cnt Number of bytes to copy; must be >= 0
*
* @note `cnt > back` is valid, this will copy the bytes we just copied,
* thus creating a repeating pattern with a period length of `back`.
*/
void av_memcpy_backptr(uint8_t *dst, int back, int cnt);
/**
* @}
*/
/**
* @defgroup lavu_mem_dynarray Dynamic Array
*
* Utilities to make an array grow when needed.
*
* Sometimes, the programmer would want to have an array that can grow when
* needed. The libavutil dynamic array utilities fill that need.
*
* libavutil supports two systems of appending elements onto a dynamically
* allocated array, the first one storing the pointer to the value in the
* array, and the second storing the value directly. In both systems, the
* caller is responsible for maintaining a variable containing the length of
* the array, as well as freeing of the array after use.
*
* The first system stores pointers to values in a block of dynamically
* allocated memory. Since only pointers are stored, the function does not need
* to know the size of the type. Both av_dynarray_add() and
* av_dynarray_add_nofree() implement this system.
*
* @code
* type **array = NULL; //< an array of pointers to values
* int nb = 0; //< a variable to keep track of the length of the array
*
* type to_be_added = ...;
* type to_be_added2 = ...;
*
* av_dynarray_add(&array, &nb, &to_be_added);
* if (nb == 0)
* return AVERROR(ENOMEM);
*
* av_dynarray_add(&array, &nb, &to_be_added2);
* if (nb == 0)
* return AVERROR(ENOMEM);
*
* // Now:
* // nb == 2
* // &to_be_added == array[0]
* // &to_be_added2 == array[1]
*
* av_freep(&array);
* @endcode
*
* The second system stores the value directly in a block of memory. As a
* result, the function has to know the size of the type. av_dynarray2_add()
* implements this mechanism.
*
* @code
* type *array = NULL; //< an array of values
* int nb = 0; //< a variable to keep track of the length of the array
*
* type to_be_added = ...;
* type to_be_added2 = ...;
*
* type *addr = av_dynarray2_add((void **)&array, &nb, sizeof(*array), NULL);
* if (!addr)
* return AVERROR(ENOMEM);
* memcpy(addr, &to_be_added, sizeof(to_be_added));
*
* // Shortcut of the above.
* type *addr = av_dynarray2_add((void **)&array, &nb, sizeof(*array),
* (const void *)&to_be_added2);
* if (!addr)
* return AVERROR(ENOMEM);
*
* // Now:
* // nb == 2
* // to_be_added == array[0]
* // to_be_added2 == array[1]
*
* av_freep(&array);
* @endcode
*
* @{
*/
/**
* Add the pointer to an element to a dynamic array.
*
* The array to grow is supposed to be an array of pointers to
* structures, and the element to add must be a pointer to an already
* allocated structure.
*
* The array is reallocated when its size reaches powers of 2.
* Therefore, the amortized cost of adding an element is constant.
*
* In case of success, the pointer to the array is updated in order to
* point to the new grown array, and the number pointed to by `nb_ptr`
* is incremented.
* In case of failure, the array is freed, `*tab_ptr` is set to `NULL` and
* `*nb_ptr` is set to 0.
*
* @param[in,out] tab_ptr Pointer to the array to grow
* @param[in,out] nb_ptr Pointer to the number of elements in the array
* @param[in] elem Element to add
* @see av_dynarray_add_nofree(), av_dynarray2_add()
*/
void av_dynarray_add(void *tab_ptr, int *nb_ptr, void *elem);
/**
* Add an element to a dynamic array.
*
* Function has the same functionality as av_dynarray_add(),
* but it doesn't free memory on fails. It returns error code
* instead and leave current buffer untouched.
*
* @return >=0 on success, negative otherwise
* @see av_dynarray_add(), av_dynarray2_add()
*/
av_warn_unused_result
int av_dynarray_add_nofree(void *tab_ptr, int *nb_ptr, void *elem);
/**
* Add an element of size `elem_size` to a dynamic array.
*
* The array is reallocated when its number of elements reaches powers of 2.
* Therefore, the amortized cost of adding an element is constant.
*
* In case of success, the pointer to the array is updated in order to
* point to the new grown array, and the number pointed to by `nb_ptr`
* is incremented.
* In case of failure, the array is freed, `*tab_ptr` is set to `NULL` and
* `*nb_ptr` is set to 0.
*
* @param[in,out] tab_ptr Pointer to the array to grow
* @param[in,out] nb_ptr Pointer to the number of elements in the array
* @param[in] elem_size Size in bytes of an element in the array
* @param[in] elem_data Pointer to the data of the element to add. If
* `NULL`, the space of the newly added element is
* allocated but left uninitialized.
*
* @return Pointer to the data of the element to copy in the newly allocated
* space
* @see av_dynarray_add(), av_dynarray_add_nofree()
*/
void *av_dynarray2_add(void **tab_ptr, int *nb_ptr, size_t elem_size,
const uint8_t *elem_data);
/**
* @}
*/
/**
* @defgroup lavu_mem_misc Miscellaneous Functions
*
* Other functions related to memory allocation.
*
* @{
*/
/**
* Multiply two `size_t` values checking for overflow.
*
* @param[in] a,b Operands of multiplication
* @param[out] r Pointer to the result of the operation
* @return 0 on success, AVERROR(EINVAL) on overflow
*/
static inline int av_size_mult(size_t a, size_t b, size_t *r)
{
size_t t = a * b;
/* Hack inspired from glibc: don't try the division if nelem and elsize
* are both less than sqrt(SIZE_MAX). */
if ((a | b) >= ((size_t)1 << (sizeof(size_t) * 4)) && a && t / a != b)
return AVERROR(EINVAL);
*r = t;
return 0;
}
/**
* Set the maximum size that may be allocated in one block.
*
* The value specified with this function is effective for all libavutil's @ref
* lavu_mem_funcs "heap management functions."
*
* By default, the max value is defined as `INT_MAX`.
*
* @param max Value to be set as the new maximum size
*
* @warning Exercise extreme caution when using this function. Don't touch
* this if you do not understand the full consequence of doing so.
*/
void av_max_alloc(size_t max);
/**
* @}
* @}
*/
#endif /* AVUTIL_MEM_H */

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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_MOTION_VECTOR_H
#define AVUTIL_MOTION_VECTOR_H
#include <stdint.h>
typedef struct AVMotionVector {
/**
* Where the current macroblock comes from; negative value when it comes
* from the past, positive value when it comes from the future.
* XXX: set exact relative ref frame reference instead of a +/- 1 "direction".
*/
int32_t source;
/**
* Width and height of the block.
*/
uint8_t w, h;
/**
* Absolute source position. Can be outside the frame area.
*/
int16_t src_x, src_y;
/**
* Absolute destination position. Can be outside the frame area.
*/
int16_t dst_x, dst_y;
/**
* Extra flag information.
* Currently unused.
*/
uint64_t flags;
/**
* Motion vector
* src_x = dst_x + motion_x / motion_scale
* src_y = dst_y + motion_y / motion_scale
*/
int32_t motion_x, motion_y;
uint16_t motion_scale;
} AVMotionVector;
#endif /* AVUTIL_MOTION_VECTOR_H */

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/*
* Copyright (C) 2013 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* @ingroup lavu_murmur3
* Public header for MurmurHash3 hash function implementation.
*/
#ifndef AVUTIL_MURMUR3_H
#define AVUTIL_MURMUR3_H
#include <stdint.h>
/**
* @defgroup lavu_murmur3 Murmur3
* @ingroup lavu_hash
* MurmurHash3 hash function implementation.
*
* MurmurHash3 is a non-cryptographic hash function, of which three
* incompatible versions were created by its inventor Austin Appleby:
*
* - 32-bit output
* - 128-bit output for 32-bit platforms
* - 128-bit output for 64-bit platforms
*
* FFmpeg only implements the last variant: 128-bit output designed for 64-bit
* platforms. Even though the hash function was designed for 64-bit platforms,
* the function in reality works on 32-bit systems too, only with reduced
* performance.
*
* @anchor lavu_murmur3_seedinfo
* By design, MurmurHash3 requires a seed to operate. In response to this,
* libavutil provides two functions for hash initiation, one that requires a
* seed (av_murmur3_init_seeded()) and one that uses a fixed arbitrary integer
* as the seed, and therefore does not (av_murmur3_init()).
*
* To make hashes comparable, you should provide the same seed for all calls to
* this hash function -- if you are supplying one yourself, that is.
*
* @{
*/
/**
* Allocate an AVMurMur3 hash context.
*
* @return Uninitialized hash context or `NULL` in case of error
*/
struct AVMurMur3 *av_murmur3_alloc(void);
/**
* Initialize or reinitialize an AVMurMur3 hash context with a seed.
*
* @param[out] c Hash context
* @param[in] seed Random seed
*
* @see av_murmur3_init()
* @see @ref lavu_murmur3_seedinfo "Detailed description" on a discussion of
* seeds for MurmurHash3.
*/
void av_murmur3_init_seeded(struct AVMurMur3 *c, uint64_t seed);
/**
* Initialize or reinitialize an AVMurMur3 hash context.
*
* Equivalent to av_murmur3_init_seeded() with a built-in seed.
*
* @param[out] c Hash context
*
* @see av_murmur3_init_seeded()
* @see @ref lavu_murmur3_seedinfo "Detailed description" on a discussion of
* seeds for MurmurHash3.
*/
void av_murmur3_init(struct AVMurMur3 *c);
/**
* Update hash context with new data.
*
* @param[out] c Hash context
* @param[in] src Input data to update hash with
* @param[in] len Number of bytes to read from `src`
*/
void av_murmur3_update(struct AVMurMur3 *c, const uint8_t *src, int len);
/**
* Finish hashing and output digest value.
*
* @param[in,out] c Hash context
* @param[out] dst Buffer where output digest value is stored
*/
void av_murmur3_final(struct AVMurMur3 *c, uint8_t dst[16]);
/**
* @}
*/
#endif /* AVUTIL_MURMUR3_H */

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/*
* AVOptions
* copyright (c) 2005 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_OPT_H
#define AVUTIL_OPT_H
/**
* @file
* AVOptions
*/
#include "rational.h"
#include "avutil.h"
#include "dict.h"
#include "log.h"
#include "pixfmt.h"
#include "samplefmt.h"
#include "version.h"
/**
* @defgroup avoptions AVOptions
* @ingroup lavu_data
* @{
* AVOptions provide a generic system to declare options on arbitrary structs
* ("objects"). An option can have a help text, a type and a range of possible
* values. Options may then be enumerated, read and written to.
*
* @section avoptions_implement Implementing AVOptions
* This section describes how to add AVOptions capabilities to a struct.
*
* All AVOptions-related information is stored in an AVClass. Therefore
* the first member of the struct should be a pointer to an AVClass describing it.
* The option field of the AVClass must be set to a NULL-terminated static array
* of AVOptions. Each AVOption must have a non-empty name, a type, a default
* value and for number-type AVOptions also a range of allowed values. It must
* also declare an offset in bytes from the start of the struct, where the field
* associated with this AVOption is located. Other fields in the AVOption struct
* should also be set when applicable, but are not required.
*
* The following example illustrates an AVOptions-enabled struct:
* @code
* typedef struct test_struct {
* const AVClass *class;
* int int_opt;
* char *str_opt;
* uint8_t *bin_opt;
* int bin_len;
* } test_struct;
*
* static const AVOption test_options[] = {
* { "test_int", "This is a test option of int type.", offsetof(test_struct, int_opt),
* AV_OPT_TYPE_INT, { .i64 = -1 }, INT_MIN, INT_MAX },
* { "test_str", "This is a test option of string type.", offsetof(test_struct, str_opt),
* AV_OPT_TYPE_STRING },
* { "test_bin", "This is a test option of binary type.", offsetof(test_struct, bin_opt),
* AV_OPT_TYPE_BINARY },
* { NULL },
* };
*
* static const AVClass test_class = {
* .class_name = "test class",
* .item_name = av_default_item_name,
* .option = test_options,
* .version = LIBAVUTIL_VERSION_INT,
* };
* @endcode
*
* Next, when allocating your struct, you must ensure that the AVClass pointer
* is set to the correct value. Then, av_opt_set_defaults() can be called to
* initialize defaults. After that the struct is ready to be used with the
* AVOptions API.
*
* When cleaning up, you may use the av_opt_free() function to automatically
* free all the allocated string and binary options.
*
* Continuing with the above example:
*
* @code
* test_struct *alloc_test_struct(void)
* {
* test_struct *ret = av_mallocz(sizeof(*ret));
* ret->class = &test_class;
* av_opt_set_defaults(ret);
* return ret;
* }
* void free_test_struct(test_struct **foo)
* {
* av_opt_free(*foo);
* av_freep(foo);
* }
* @endcode
*
* @subsection avoptions_implement_nesting Nesting
* It may happen that an AVOptions-enabled struct contains another
* AVOptions-enabled struct as a member (e.g. AVCodecContext in
* libavcodec exports generic options, while its priv_data field exports
* codec-specific options). In such a case, it is possible to set up the
* parent struct to export a child's options. To do that, simply
* implement AVClass.child_next() and AVClass.child_class_next() in the
* parent struct's AVClass.
* Assuming that the test_struct from above now also contains a
* child_struct field:
*
* @code
* typedef struct child_struct {
* AVClass *class;
* int flags_opt;
* } child_struct;
* static const AVOption child_opts[] = {
* { "test_flags", "This is a test option of flags type.",
* offsetof(child_struct, flags_opt), AV_OPT_TYPE_FLAGS, { .i64 = 0 }, INT_MIN, INT_MAX },
* { NULL },
* };
* static const AVClass child_class = {
* .class_name = "child class",
* .item_name = av_default_item_name,
* .option = child_opts,
* .version = LIBAVUTIL_VERSION_INT,
* };
*
* void *child_next(void *obj, void *prev)
* {
* test_struct *t = obj;
* if (!prev && t->child_struct)
* return t->child_struct;
* return NULL
* }
* const AVClass child_class_next(const AVClass *prev)
* {
* return prev ? NULL : &child_class;
* }
* @endcode
* Putting child_next() and child_class_next() as defined above into
* test_class will now make child_struct's options accessible through
* test_struct (again, proper setup as described above needs to be done on
* child_struct right after it is created).
*
* From the above example it might not be clear why both child_next()
* and child_class_next() are needed. The distinction is that child_next()
* iterates over actually existing objects, while child_class_next()
* iterates over all possible child classes. E.g. if an AVCodecContext
* was initialized to use a codec which has private options, then its
* child_next() will return AVCodecContext.priv_data and finish
* iterating. OTOH child_class_next() on AVCodecContext.av_class will
* iterate over all available codecs with private options.
*
* @subsection avoptions_implement_named_constants Named constants
* It is possible to create named constants for options. Simply set the unit
* field of the option the constants should apply to a string and
* create the constants themselves as options of type AV_OPT_TYPE_CONST
* with their unit field set to the same string.
* Their default_val field should contain the value of the named
* constant.
* For example, to add some named constants for the test_flags option
* above, put the following into the child_opts array:
* @code
* { "test_flags", "This is a test option of flags type.",
* offsetof(child_struct, flags_opt), AV_OPT_TYPE_FLAGS, { .i64 = 0 }, INT_MIN, INT_MAX, "test_unit" },
* { "flag1", "This is a flag with value 16", 0, AV_OPT_TYPE_CONST, { .i64 = 16 }, 0, 0, "test_unit" },
* @endcode
*
* @section avoptions_use Using AVOptions
* This section deals with accessing options in an AVOptions-enabled struct.
* Such structs in FFmpeg are e.g. AVCodecContext in libavcodec or
* AVFormatContext in libavformat.
*
* @subsection avoptions_use_examine Examining AVOptions
* The basic functions for examining options are av_opt_next(), which iterates
* over all options defined for one object, and av_opt_find(), which searches
* for an option with the given name.
*
* The situation is more complicated with nesting. An AVOptions-enabled struct
* may have AVOptions-enabled children. Passing the AV_OPT_SEARCH_CHILDREN flag
* to av_opt_find() will make the function search children recursively.
*
* For enumerating there are basically two cases. The first is when you want to
* get all options that may potentially exist on the struct and its children
* (e.g. when constructing documentation). In that case you should call
* av_opt_child_class_next() recursively on the parent struct's AVClass. The
* second case is when you have an already initialized struct with all its
* children and you want to get all options that can be actually written or read
* from it. In that case you should call av_opt_child_next() recursively (and
* av_opt_next() on each result).
*
* @subsection avoptions_use_get_set Reading and writing AVOptions
* When setting options, you often have a string read directly from the
* user. In such a case, simply passing it to av_opt_set() is enough. For
* non-string type options, av_opt_set() will parse the string according to the
* option type.
*
* Similarly av_opt_get() will read any option type and convert it to a string
* which will be returned. Do not forget that the string is allocated, so you
* have to free it with av_free().
*
* In some cases it may be more convenient to put all options into an
* AVDictionary and call av_opt_set_dict() on it. A specific case of this
* are the format/codec open functions in lavf/lavc which take a dictionary
* filled with option as a parameter. This makes it possible to set some options
* that cannot be set otherwise, since e.g. the input file format is not known
* before the file is actually opened.
*/
enum AVOptionType{
AV_OPT_TYPE_FLAGS,
AV_OPT_TYPE_INT,
AV_OPT_TYPE_INT64,
AV_OPT_TYPE_DOUBLE,
AV_OPT_TYPE_FLOAT,
AV_OPT_TYPE_STRING,
AV_OPT_TYPE_RATIONAL,
AV_OPT_TYPE_BINARY, ///< offset must point to a pointer immediately followed by an int for the length
AV_OPT_TYPE_DICT,
AV_OPT_TYPE_UINT64,
AV_OPT_TYPE_CONST = 128,
AV_OPT_TYPE_IMAGE_SIZE = MKBETAG('S','I','Z','E'), ///< offset must point to two consecutive integers
AV_OPT_TYPE_PIXEL_FMT = MKBETAG('P','F','M','T'),
AV_OPT_TYPE_SAMPLE_FMT = MKBETAG('S','F','M','T'),
AV_OPT_TYPE_VIDEO_RATE = MKBETAG('V','R','A','T'), ///< offset must point to AVRational
AV_OPT_TYPE_DURATION = MKBETAG('D','U','R',' '),
AV_OPT_TYPE_COLOR = MKBETAG('C','O','L','R'),
AV_OPT_TYPE_CHANNEL_LAYOUT = MKBETAG('C','H','L','A'),
AV_OPT_TYPE_BOOL = MKBETAG('B','O','O','L'),
};
/**
* AVOption
*/
typedef struct AVOption {
const char *name;
/**
* short English help text
* @todo What about other languages?
*/
const char *help;
/**
* The offset relative to the context structure where the option
* value is stored. It should be 0 for named constants.
*/
int offset;
enum AVOptionType type;
/**
* the default value for scalar options
*/
union {
int64_t i64;
double dbl;
const char *str;
/* TODO those are unused now */
AVRational q;
} default_val;
double min; ///< minimum valid value for the option
double max; ///< maximum valid value for the option
int flags;
#define AV_OPT_FLAG_ENCODING_PARAM 1 ///< a generic parameter which can be set by the user for muxing or encoding
#define AV_OPT_FLAG_DECODING_PARAM 2 ///< a generic parameter which can be set by the user for demuxing or decoding
#if FF_API_OPT_TYPE_METADATA
#define AV_OPT_FLAG_METADATA 4 ///< some data extracted or inserted into the file like title, comment, ...
#endif
#define AV_OPT_FLAG_AUDIO_PARAM 8
#define AV_OPT_FLAG_VIDEO_PARAM 16
#define AV_OPT_FLAG_SUBTITLE_PARAM 32
/**
* The option is intended for exporting values to the caller.
*/
#define AV_OPT_FLAG_EXPORT 64
/**
* The option may not be set through the AVOptions API, only read.
* This flag only makes sense when AV_OPT_FLAG_EXPORT is also set.
*/
#define AV_OPT_FLAG_READONLY 128
#define AV_OPT_FLAG_FILTERING_PARAM (1<<16) ///< a generic parameter which can be set by the user for filtering
//FIXME think about enc-audio, ... style flags
/**
* The logical unit to which the option belongs. Non-constant
* options and corresponding named constants share the same
* unit. May be NULL.
*/
const char *unit;
} AVOption;
/**
* A single allowed range of values, or a single allowed value.
*/
typedef struct AVOptionRange {
const char *str;
/**
* Value range.
* For string ranges this represents the min/max length.
* For dimensions this represents the min/max pixel count or width/height in multi-component case.
*/
double value_min, value_max;
/**
* Value's component range.
* For string this represents the unicode range for chars, 0-127 limits to ASCII.
*/
double component_min, component_max;
/**
* Range flag.
* If set to 1 the struct encodes a range, if set to 0 a single value.
*/
int is_range;
} AVOptionRange;
/**
* List of AVOptionRange structs.
*/
typedef struct AVOptionRanges {
/**
* Array of option ranges.
*
* Most of option types use just one component.
* Following describes multi-component option types:
*
* AV_OPT_TYPE_IMAGE_SIZE:
* component index 0: range of pixel count (width * height).
* component index 1: range of width.
* component index 2: range of height.
*
* @note To obtain multi-component version of this structure, user must
* provide AV_OPT_MULTI_COMPONENT_RANGE to av_opt_query_ranges or
* av_opt_query_ranges_default function.
*
* Multi-component range can be read as in following example:
*
* @code
* int range_index, component_index;
* AVOptionRanges *ranges;
* AVOptionRange *range[3]; //may require more than 3 in the future.
* av_opt_query_ranges(&ranges, obj, key, AV_OPT_MULTI_COMPONENT_RANGE);
* for (range_index = 0; range_index < ranges->nb_ranges; range_index++) {
* for (component_index = 0; component_index < ranges->nb_components; component_index++)
* range[component_index] = ranges->range[ranges->nb_ranges * component_index + range_index];
* //do something with range here.
* }
* av_opt_freep_ranges(&ranges);
* @endcode
*/
AVOptionRange **range;
/**
* Number of ranges per component.
*/
int nb_ranges;
/**
* Number of componentes.
*/
int nb_components;
} AVOptionRanges;
/**
* Show the obj options.
*
* @param req_flags requested flags for the options to show. Show only the
* options for which it is opt->flags & req_flags.
* @param rej_flags rejected flags for the options to show. Show only the
* options for which it is !(opt->flags & req_flags).
* @param av_log_obj log context to use for showing the options
*/
int av_opt_show2(void *obj, void *av_log_obj, int req_flags, int rej_flags);
/**
* Set the values of all AVOption fields to their default values.
*
* @param s an AVOption-enabled struct (its first member must be a pointer to AVClass)
*/
void av_opt_set_defaults(void *s);
/**
* Set the values of all AVOption fields to their default values. Only these
* AVOption fields for which (opt->flags & mask) == flags will have their
* default applied to s.
*
* @param s an AVOption-enabled struct (its first member must be a pointer to AVClass)
* @param mask combination of AV_OPT_FLAG_*
* @param flags combination of AV_OPT_FLAG_*
*/
void av_opt_set_defaults2(void *s, int mask, int flags);
/**
* Parse the key/value pairs list in opts. For each key/value pair
* found, stores the value in the field in ctx that is named like the
* key. ctx must be an AVClass context, storing is done using
* AVOptions.
*
* @param opts options string to parse, may be NULL
* @param key_val_sep a 0-terminated list of characters used to
* separate key from value
* @param pairs_sep a 0-terminated list of characters used to separate
* two pairs from each other
* @return the number of successfully set key/value pairs, or a negative
* value corresponding to an AVERROR code in case of error:
* AVERROR(EINVAL) if opts cannot be parsed,
* the error code issued by av_opt_set() if a key/value pair
* cannot be set
*/
int av_set_options_string(void *ctx, const char *opts,
const char *key_val_sep, const char *pairs_sep);
/**
* Parse the key-value pairs list in opts. For each key=value pair found,
* set the value of the corresponding option in ctx.
*
* @param ctx the AVClass object to set options on
* @param opts the options string, key-value pairs separated by a
* delimiter
* @param shorthand a NULL-terminated array of options names for shorthand
* notation: if the first field in opts has no key part,
* the key is taken from the first element of shorthand;
* then again for the second, etc., until either opts is
* finished, shorthand is finished or a named option is
* found; after that, all options must be named
* @param key_val_sep a 0-terminated list of characters used to separate
* key from value, for example '='
* @param pairs_sep a 0-terminated list of characters used to separate
* two pairs from each other, for example ':' or ','
* @return the number of successfully set key=value pairs, or a negative
* value corresponding to an AVERROR code in case of error:
* AVERROR(EINVAL) if opts cannot be parsed,
* the error code issued by av_set_string3() if a key/value pair
* cannot be set
*
* Options names must use only the following characters: a-z A-Z 0-9 - . / _
* Separators must use characters distinct from option names and from each
* other.
*/
int av_opt_set_from_string(void *ctx, const char *opts,
const char *const *shorthand,
const char *key_val_sep, const char *pairs_sep);
/**
* Free all allocated objects in obj.
*/
void av_opt_free(void *obj);
/**
* Check whether a particular flag is set in a flags field.
*
* @param field_name the name of the flag field option
* @param flag_name the name of the flag to check
* @return non-zero if the flag is set, zero if the flag isn't set,
* isn't of the right type, or the flags field doesn't exist.
*/
int av_opt_flag_is_set(void *obj, const char *field_name, const char *flag_name);
/**
* Set all the options from a given dictionary on an object.
*
* @param obj a struct whose first element is a pointer to AVClass
* @param options options to process. This dictionary will be freed and replaced
* by a new one containing all options not found in obj.
* Of course this new dictionary needs to be freed by caller
* with av_dict_free().
*
* @return 0 on success, a negative AVERROR if some option was found in obj,
* but could not be set.
*
* @see av_dict_copy()
*/
int av_opt_set_dict(void *obj, struct AVDictionary **options);
/**
* Set all the options from a given dictionary on an object.
*
* @param obj a struct whose first element is a pointer to AVClass
* @param options options to process. This dictionary will be freed and replaced
* by a new one containing all options not found in obj.
* Of course this new dictionary needs to be freed by caller
* with av_dict_free().
* @param search_flags A combination of AV_OPT_SEARCH_*.
*
* @return 0 on success, a negative AVERROR if some option was found in obj,
* but could not be set.
*
* @see av_dict_copy()
*/
int av_opt_set_dict2(void *obj, struct AVDictionary **options, int search_flags);
/**
* Extract a key-value pair from the beginning of a string.
*
* @param ropts pointer to the options string, will be updated to
* point to the rest of the string (one of the pairs_sep
* or the final NUL)
* @param key_val_sep a 0-terminated list of characters used to separate
* key from value, for example '='
* @param pairs_sep a 0-terminated list of characters used to separate
* two pairs from each other, for example ':' or ','
* @param flags flags; see the AV_OPT_FLAG_* values below
* @param rkey parsed key; must be freed using av_free()
* @param rval parsed value; must be freed using av_free()
*
* @return >=0 for success, or a negative value corresponding to an
* AVERROR code in case of error; in particular:
* AVERROR(EINVAL) if no key is present
*
*/
int av_opt_get_key_value(const char **ropts,
const char *key_val_sep, const char *pairs_sep,
unsigned flags,
char **rkey, char **rval);
enum {
/**
* Accept to parse a value without a key; the key will then be returned
* as NULL.
*/
AV_OPT_FLAG_IMPLICIT_KEY = 1,
};
/**
* @defgroup opt_eval_funcs Evaluating option strings
* @{
* This group of functions can be used to evaluate option strings
* and get numbers out of them. They do the same thing as av_opt_set(),
* except the result is written into the caller-supplied pointer.
*
* @param obj a struct whose first element is a pointer to AVClass.
* @param o an option for which the string is to be evaluated.
* @param val string to be evaluated.
* @param *_out value of the string will be written here.
*
* @return 0 on success, a negative number on failure.
*/
int av_opt_eval_flags (void *obj, const AVOption *o, const char *val, int *flags_out);
int av_opt_eval_int (void *obj, const AVOption *o, const char *val, int *int_out);
int av_opt_eval_int64 (void *obj, const AVOption *o, const char *val, int64_t *int64_out);
int av_opt_eval_float (void *obj, const AVOption *o, const char *val, float *float_out);
int av_opt_eval_double(void *obj, const AVOption *o, const char *val, double *double_out);
int av_opt_eval_q (void *obj, const AVOption *o, const char *val, AVRational *q_out);
/**
* @}
*/
#define AV_OPT_SEARCH_CHILDREN (1 << 0) /**< Search in possible children of the
given object first. */
/**
* The obj passed to av_opt_find() is fake -- only a double pointer to AVClass
* instead of a required pointer to a struct containing AVClass. This is
* useful for searching for options without needing to allocate the corresponding
* object.
*/
#define AV_OPT_SEARCH_FAKE_OBJ (1 << 1)
/**
* In av_opt_get, return NULL if the option has a pointer type and is set to NULL,
* rather than returning an empty string.
*/
#define AV_OPT_ALLOW_NULL (1 << 2)
/**
* Allows av_opt_query_ranges and av_opt_query_ranges_default to return more than
* one component for certain option types.
* @see AVOptionRanges for details.
*/
#define AV_OPT_MULTI_COMPONENT_RANGE (1 << 12)
/**
* Look for an option in an object. Consider only options which
* have all the specified flags set.
*
* @param[in] obj A pointer to a struct whose first element is a
* pointer to an AVClass.
* Alternatively a double pointer to an AVClass, if
* AV_OPT_SEARCH_FAKE_OBJ search flag is set.
* @param[in] name The name of the option to look for.
* @param[in] unit When searching for named constants, name of the unit
* it belongs to.
* @param opt_flags Find only options with all the specified flags set (AV_OPT_FLAG).
* @param search_flags A combination of AV_OPT_SEARCH_*.
*
* @return A pointer to the option found, or NULL if no option
* was found.
*
* @note Options found with AV_OPT_SEARCH_CHILDREN flag may not be settable
* directly with av_opt_set(). Use special calls which take an options
* AVDictionary (e.g. avformat_open_input()) to set options found with this
* flag.
*/
const AVOption *av_opt_find(void *obj, const char *name, const char *unit,
int opt_flags, int search_flags);
/**
* Look for an option in an object. Consider only options which
* have all the specified flags set.
*
* @param[in] obj A pointer to a struct whose first element is a
* pointer to an AVClass.
* Alternatively a double pointer to an AVClass, if
* AV_OPT_SEARCH_FAKE_OBJ search flag is set.
* @param[in] name The name of the option to look for.
* @param[in] unit When searching for named constants, name of the unit
* it belongs to.
* @param opt_flags Find only options with all the specified flags set (AV_OPT_FLAG).
* @param search_flags A combination of AV_OPT_SEARCH_*.
* @param[out] target_obj if non-NULL, an object to which the option belongs will be
* written here. It may be different from obj if AV_OPT_SEARCH_CHILDREN is present
* in search_flags. This parameter is ignored if search_flags contain
* AV_OPT_SEARCH_FAKE_OBJ.
*
* @return A pointer to the option found, or NULL if no option
* was found.
*/
const AVOption *av_opt_find2(void *obj, const char *name, const char *unit,
int opt_flags, int search_flags, void **target_obj);
/**
* Iterate over all AVOptions belonging to obj.
*
* @param obj an AVOptions-enabled struct or a double pointer to an
* AVClass describing it.
* @param prev result of the previous call to av_opt_next() on this object
* or NULL
* @return next AVOption or NULL
*/
const AVOption *av_opt_next(const void *obj, const AVOption *prev);
/**
* Iterate over AVOptions-enabled children of obj.
*
* @param prev result of a previous call to this function or NULL
* @return next AVOptions-enabled child or NULL
*/
void *av_opt_child_next(void *obj, void *prev);
/**
* Iterate over potential AVOptions-enabled children of parent.
*
* @param prev result of a previous call to this function or NULL
* @return AVClass corresponding to next potential child or NULL
*/
const AVClass *av_opt_child_class_next(const AVClass *parent, const AVClass *prev);
/**
* @defgroup opt_set_funcs Option setting functions
* @{
* Those functions set the field of obj with the given name to value.
*
* @param[in] obj A struct whose first element is a pointer to an AVClass.
* @param[in] name the name of the field to set
* @param[in] val The value to set. In case of av_opt_set() if the field is not
* of a string type, then the given string is parsed.
* SI postfixes and some named scalars are supported.
* If the field is of a numeric type, it has to be a numeric or named
* scalar. Behavior with more than one scalar and +- infix operators
* is undefined.
* If the field is of a flags type, it has to be a sequence of numeric
* scalars or named flags separated by '+' or '-'. Prefixing a flag
* with '+' causes it to be set without affecting the other flags;
* similarly, '-' unsets a flag.
* @param search_flags flags passed to av_opt_find2. I.e. if AV_OPT_SEARCH_CHILDREN
* is passed here, then the option may be set on a child of obj.
*
* @return 0 if the value has been set, or an AVERROR code in case of
* error:
* AVERROR_OPTION_NOT_FOUND if no matching option exists
* AVERROR(ERANGE) if the value is out of range
* AVERROR(EINVAL) if the value is not valid
*/
int av_opt_set (void *obj, const char *name, const char *val, int search_flags);
int av_opt_set_int (void *obj, const char *name, int64_t val, int search_flags);
int av_opt_set_double (void *obj, const char *name, double val, int search_flags);
int av_opt_set_q (void *obj, const char *name, AVRational val, int search_flags);
int av_opt_set_bin (void *obj, const char *name, const uint8_t *val, int size, int search_flags);
int av_opt_set_image_size(void *obj, const char *name, int w, int h, int search_flags);
int av_opt_set_pixel_fmt (void *obj, const char *name, enum AVPixelFormat fmt, int search_flags);
int av_opt_set_sample_fmt(void *obj, const char *name, enum AVSampleFormat fmt, int search_flags);
int av_opt_set_video_rate(void *obj, const char *name, AVRational val, int search_flags);
int av_opt_set_channel_layout(void *obj, const char *name, int64_t ch_layout, int search_flags);
/**
* @note Any old dictionary present is discarded and replaced with a copy of the new one. The
* caller still owns val is and responsible for freeing it.
*/
int av_opt_set_dict_val(void *obj, const char *name, const AVDictionary *val, int search_flags);
/**
* Set a binary option to an integer list.
*
* @param obj AVClass object to set options on
* @param name name of the binary option
* @param val pointer to an integer list (must have the correct type with
* regard to the contents of the list)
* @param term list terminator (usually 0 or -1)
* @param flags search flags
*/
#define av_opt_set_int_list(obj, name, val, term, flags) \
(av_int_list_length(val, term) > INT_MAX / sizeof(*(val)) ? \
AVERROR(EINVAL) : \
av_opt_set_bin(obj, name, (const uint8_t *)(val), \
av_int_list_length(val, term) * sizeof(*(val)), flags))
/**
* @}
*/
/**
* @defgroup opt_get_funcs Option getting functions
* @{
* Those functions get a value of the option with the given name from an object.
*
* @param[in] obj a struct whose first element is a pointer to an AVClass.
* @param[in] name name of the option to get.
* @param[in] search_flags flags passed to av_opt_find2. I.e. if AV_OPT_SEARCH_CHILDREN
* is passed here, then the option may be found in a child of obj.
* @param[out] out_val value of the option will be written here
* @return >=0 on success, a negative error code otherwise
*/
/**
* @note the returned string will be av_malloc()ed and must be av_free()ed by the caller
*
* @note if AV_OPT_ALLOW_NULL is set in search_flags in av_opt_get, and the option has
* AV_OPT_TYPE_STRING or AV_OPT_TYPE_BINARY and is set to NULL, *out_val will be set
* to NULL instead of an allocated empty string.
*/
int av_opt_get (void *obj, const char *name, int search_flags, uint8_t **out_val);
int av_opt_get_int (void *obj, const char *name, int search_flags, int64_t *out_val);
int av_opt_get_double (void *obj, const char *name, int search_flags, double *out_val);
int av_opt_get_q (void *obj, const char *name, int search_flags, AVRational *out_val);
int av_opt_get_image_size(void *obj, const char *name, int search_flags, int *w_out, int *h_out);
int av_opt_get_pixel_fmt (void *obj, const char *name, int search_flags, enum AVPixelFormat *out_fmt);
int av_opt_get_sample_fmt(void *obj, const char *name, int search_flags, enum AVSampleFormat *out_fmt);
int av_opt_get_video_rate(void *obj, const char *name, int search_flags, AVRational *out_val);
int av_opt_get_channel_layout(void *obj, const char *name, int search_flags, int64_t *ch_layout);
/**
* @param[out] out_val The returned dictionary is a copy of the actual value and must
* be freed with av_dict_free() by the caller
*/
int av_opt_get_dict_val(void *obj, const char *name, int search_flags, AVDictionary **out_val);
/**
* @}
*/
/**
* Gets a pointer to the requested field in a struct.
* This function allows accessing a struct even when its fields are moved or
* renamed since the application making the access has been compiled,
*
* @returns a pointer to the field, it can be cast to the correct type and read
* or written to.
*/
void *av_opt_ptr(const AVClass *avclass, void *obj, const char *name);
/**
* Free an AVOptionRanges struct and set it to NULL.
*/
void av_opt_freep_ranges(AVOptionRanges **ranges);
/**
* Get a list of allowed ranges for the given option.
*
* The returned list may depend on other fields in obj like for example profile.
*
* @param flags is a bitmask of flags, undefined flags should not be set and should be ignored
* AV_OPT_SEARCH_FAKE_OBJ indicates that the obj is a double pointer to a AVClass instead of a full instance
* AV_OPT_MULTI_COMPONENT_RANGE indicates that function may return more than one component, @see AVOptionRanges
*
* The result must be freed with av_opt_freep_ranges.
*
* @return number of compontents returned on success, a negative errro code otherwise
*/
int av_opt_query_ranges(AVOptionRanges **, void *obj, const char *key, int flags);
/**
* Copy options from src object into dest object.
*
* Options that require memory allocation (e.g. string or binary) are malloc'ed in dest object.
* Original memory allocated for such options is freed unless both src and dest options points to the same memory.
*
* @param dest Object to copy from
* @param src Object to copy into
* @return 0 on success, negative on error
*/
int av_opt_copy(void *dest, const void *src);
/**
* Get a default list of allowed ranges for the given option.
*
* This list is constructed without using the AVClass.query_ranges() callback
* and can be used as fallback from within the callback.
*
* @param flags is a bitmask of flags, undefined flags should not be set and should be ignored
* AV_OPT_SEARCH_FAKE_OBJ indicates that the obj is a double pointer to a AVClass instead of a full instance
* AV_OPT_MULTI_COMPONENT_RANGE indicates that function may return more than one component, @see AVOptionRanges
*
* The result must be freed with av_opt_free_ranges.
*
* @return number of compontents returned on success, a negative errro code otherwise
*/
int av_opt_query_ranges_default(AVOptionRanges **, void *obj, const char *key, int flags);
/**
* Check if given option is set to its default value.
*
* Options o must belong to the obj. This function must not be called to check child's options state.
* @see av_opt_is_set_to_default_by_name().
*
* @param obj AVClass object to check option on
* @param o option to be checked
* @return >0 when option is set to its default,
* 0 when option is not set its default,
* <0 on error
*/
int av_opt_is_set_to_default(void *obj, const AVOption *o);
/**
* Check if given option is set to its default value.
*
* @param obj AVClass object to check option on
* @param name option name
* @param search_flags combination of AV_OPT_SEARCH_*
* @return >0 when option is set to its default,
* 0 when option is not set its default,
* <0 on error
*/
int av_opt_is_set_to_default_by_name(void *obj, const char *name, int search_flags);
#define AV_OPT_SERIALIZE_SKIP_DEFAULTS 0x00000001 ///< Serialize options that are not set to default values only.
#define AV_OPT_SERIALIZE_OPT_FLAGS_EXACT 0x00000002 ///< Serialize options that exactly match opt_flags only.
/**
* Serialize object's options.
*
* Create a string containing object's serialized options.
* Such string may be passed back to av_opt_set_from_string() in order to restore option values.
* A key/value or pairs separator occurring in the serialized value or
* name string are escaped through the av_escape() function.
*
* @param[in] obj AVClass object to serialize
* @param[in] opt_flags serialize options with all the specified flags set (AV_OPT_FLAG)
* @param[in] flags combination of AV_OPT_SERIALIZE_* flags
* @param[out] buffer Pointer to buffer that will be allocated with string containg serialized options.
* Buffer must be freed by the caller when is no longer needed.
* @param[in] key_val_sep character used to separate key from value
* @param[in] pairs_sep character used to separate two pairs from each other
* @return >= 0 on success, negative on error
* @warning Separators cannot be neither '\\' nor '\0'. They also cannot be the same.
*/
int av_opt_serialize(void *obj, int opt_flags, int flags, char **buffer,
const char key_val_sep, const char pairs_sep);
/**
* @}
*/
#endif /* AVUTIL_OPT_H */

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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_PARSEUTILS_H
#define AVUTIL_PARSEUTILS_H
#include <time.h>
#include "rational.h"
/**
* @file
* misc parsing utilities
*/
/**
* Parse str and store the parsed ratio in q.
*
* Note that a ratio with infinite (1/0) or negative value is
* considered valid, so you should check on the returned value if you
* want to exclude those values.
*
* The undefined value can be expressed using the "0:0" string.
*
* @param[in,out] q pointer to the AVRational which will contain the ratio
* @param[in] str the string to parse: it has to be a string in the format
* num:den, a float number or an expression
* @param[in] max the maximum allowed numerator and denominator
* @param[in] log_offset log level offset which is applied to the log
* level of log_ctx
* @param[in] log_ctx parent logging context
* @return >= 0 on success, a negative error code otherwise
*/
int av_parse_ratio(AVRational *q, const char *str, int max,
int log_offset, void *log_ctx);
#define av_parse_ratio_quiet(rate, str, max) \
av_parse_ratio(rate, str, max, AV_LOG_MAX_OFFSET, NULL)
/**
* Parse str and put in width_ptr and height_ptr the detected values.
*
* @param[in,out] width_ptr pointer to the variable which will contain the detected
* width value
* @param[in,out] height_ptr pointer to the variable which will contain the detected
* height value
* @param[in] str the string to parse: it has to be a string in the format
* width x height or a valid video size abbreviation.
* @return >= 0 on success, a negative error code otherwise
*/
int av_parse_video_size(int *width_ptr, int *height_ptr, const char *str);
/**
* Parse str and store the detected values in *rate.
*
* @param[in,out] rate pointer to the AVRational which will contain the detected
* frame rate
* @param[in] str the string to parse: it has to be a string in the format
* rate_num / rate_den, a float number or a valid video rate abbreviation
* @return >= 0 on success, a negative error code otherwise
*/
int av_parse_video_rate(AVRational *rate, const char *str);
/**
* Put the RGBA values that correspond to color_string in rgba_color.
*
* @param color_string a string specifying a color. It can be the name of
* a color (case insensitive match) or a [0x|#]RRGGBB[AA] sequence,
* possibly followed by "@" and a string representing the alpha
* component.
* The alpha component may be a string composed by "0x" followed by an
* hexadecimal number or a decimal number between 0.0 and 1.0, which
* represents the opacity value (0x00/0.0 means completely transparent,
* 0xff/1.0 completely opaque).
* If the alpha component is not specified then 0xff is assumed.
* The string "random" will result in a random color.
* @param slen length of the initial part of color_string containing the
* color. It can be set to -1 if color_string is a null terminated string
* containing nothing else than the color.
* @return >= 0 in case of success, a negative value in case of
* failure (for example if color_string cannot be parsed).
*/
int av_parse_color(uint8_t *rgba_color, const char *color_string, int slen,
void *log_ctx);
/**
* Get the name of a color from the internal table of hard-coded named
* colors.
*
* This function is meant to enumerate the color names recognized by
* av_parse_color().
*
* @param color_idx index of the requested color, starting from 0
* @param rgbp if not NULL, will point to a 3-elements array with the color value in RGB
* @return the color name string or NULL if color_idx is not in the array
*/
const char *av_get_known_color_name(int color_idx, const uint8_t **rgb);
/**
* Parse timestr and return in *time a corresponding number of
* microseconds.
*
* @param timeval puts here the number of microseconds corresponding
* to the string in timestr. If the string represents a duration, it
* is the number of microseconds contained in the time interval. If
* the string is a date, is the number of microseconds since 1st of
* January, 1970 up to the time of the parsed date. If timestr cannot
* be successfully parsed, set *time to INT64_MIN.
* @param timestr a string representing a date or a duration.
* - If a date the syntax is:
* @code
* [{YYYY-MM-DD|YYYYMMDD}[T|t| ]]{{HH:MM:SS[.m...]]]}|{HHMMSS[.m...]]]}}[Z]
* now
* @endcode
* If the value is "now" it takes the current time.
* Time is local time unless Z is appended, in which case it is
* interpreted as UTC.
* If the year-month-day part is not specified it takes the current
* year-month-day.
* - If a duration the syntax is:
* @code
* [-][HH:]MM:SS[.m...]
* [-]S+[.m...]
* @endcode
* @param duration flag which tells how to interpret timestr, if not
* zero timestr is interpreted as a duration, otherwise as a date
* @return >= 0 in case of success, a negative value corresponding to an
* AVERROR code otherwise
*/
int av_parse_time(int64_t *timeval, const char *timestr, int duration);
/**
* Attempt to find a specific tag in a URL.
*
* syntax: '?tag1=val1&tag2=val2...'. Little URL decoding is done.
* Return 1 if found.
*/
int av_find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
/**
* Simplified version of strptime
*
* Parse the input string p according to the format string fmt and
* store its results in the structure dt.
* This implementation supports only a subset of the formats supported
* by the standard strptime().
*
* The supported input field descriptors are listed below.
* - %H: the hour as a decimal number, using a 24-hour clock, in the
* range '00' through '23'
* - %J: hours as a decimal number, in the range '0' through INT_MAX
* - %M: the minute as a decimal number, using a 24-hour clock, in the
* range '00' through '59'
* - %S: the second as a decimal number, using a 24-hour clock, in the
* range '00' through '59'
* - %Y: the year as a decimal number, using the Gregorian calendar
* - %m: the month as a decimal number, in the range '1' through '12'
* - %d: the day of the month as a decimal number, in the range '1'
* through '31'
* - %T: alias for '%H:%M:%S'
* - %%: a literal '%'
*
* @return a pointer to the first character not processed in this function
* call. In case the input string contains more characters than
* required by the format string the return value points right after
* the last consumed input character. In case the whole input string
* is consumed the return value points to the null byte at the end of
* the string. On failure NULL is returned.
*/
char *av_small_strptime(const char *p, const char *fmt, struct tm *dt);
/**
* Convert the decomposed UTC time in tm to a time_t value.
*/
time_t av_timegm(struct tm *tm);
#endif /* AVUTIL_PARSEUTILS_H */

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/*
* pixel format descriptor
* Copyright (c) 2009 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_PIXDESC_H
#define AVUTIL_PIXDESC_H
#include <inttypes.h>
#include "attributes.h"
#include "pixfmt.h"
#include "version.h"
typedef struct AVComponentDescriptor {
/**
* Which of the 4 planes contains the component.
*/
int plane;
/**
* Number of elements between 2 horizontally consecutive pixels.
* Elements are bits for bitstream formats, bytes otherwise.
*/
int step;
/**
* Number of elements before the component of the first pixel.
* Elements are bits for bitstream formats, bytes otherwise.
*/
int offset;
/**
* Number of least significant bits that must be shifted away
* to get the value.
*/
int shift;
/**
* Number of bits in the component.
*/
int depth;
#if FF_API_PLUS1_MINUS1
/** deprecated, use step instead */
attribute_deprecated int step_minus1;
/** deprecated, use depth instead */
attribute_deprecated int depth_minus1;
/** deprecated, use offset instead */
attribute_deprecated int offset_plus1;
#endif
} AVComponentDescriptor;
/**
* Descriptor that unambiguously describes how the bits of a pixel are
* stored in the up to 4 data planes of an image. It also stores the
* subsampling factors and number of components.
*
* @note This is separate of the colorspace (RGB, YCbCr, YPbPr, JPEG-style YUV
* and all the YUV variants) AVPixFmtDescriptor just stores how values
* are stored not what these values represent.
*/
typedef struct AVPixFmtDescriptor {
const char *name;
uint8_t nb_components; ///< The number of components each pixel has, (1-4)
/**
* Amount to shift the luma width right to find the chroma width.
* For YV12 this is 1 for example.
* chroma_width = AV_CEIL_RSHIFT(luma_width, log2_chroma_w)
* The note above is needed to ensure rounding up.
* This value only refers to the chroma components.
*/
uint8_t log2_chroma_w;
/**
* Amount to shift the luma height right to find the chroma height.
* For YV12 this is 1 for example.
* chroma_height= AV_CEIL_RSHIFT(luma_height, log2_chroma_h)
* The note above is needed to ensure rounding up.
* This value only refers to the chroma components.
*/
uint8_t log2_chroma_h;
/**
* Combination of AV_PIX_FMT_FLAG_... flags.
*/
uint64_t flags;
/**
* Parameters that describe how pixels are packed.
* If the format has 1 or 2 components, then luma is 0.
* If the format has 3 or 4 components:
* if the RGB flag is set then 0 is red, 1 is green and 2 is blue;
* otherwise 0 is luma, 1 is chroma-U and 2 is chroma-V.
*
* If present, the Alpha channel is always the last component.
*/
AVComponentDescriptor comp[4];
/**
* Alternative comma-separated names.
*/
const char *alias;
} AVPixFmtDescriptor;
/**
* Pixel format is big-endian.
*/
#define AV_PIX_FMT_FLAG_BE (1 << 0)
/**
* Pixel format has a palette in data[1], values are indexes in this palette.
*/
#define AV_PIX_FMT_FLAG_PAL (1 << 1)
/**
* All values of a component are bit-wise packed end to end.
*/
#define AV_PIX_FMT_FLAG_BITSTREAM (1 << 2)
/**
* Pixel format is an HW accelerated format.
*/
#define AV_PIX_FMT_FLAG_HWACCEL (1 << 3)
/**
* At least one pixel component is not in the first data plane.
*/
#define AV_PIX_FMT_FLAG_PLANAR (1 << 4)
/**
* The pixel format contains RGB-like data (as opposed to YUV/grayscale).
*/
#define AV_PIX_FMT_FLAG_RGB (1 << 5)
/**
* The pixel format is "pseudo-paletted". This means that it contains a
* fixed palette in the 2nd plane but the palette is fixed/constant for each
* PIX_FMT. This allows interpreting the data as if it was PAL8, which can
* in some cases be simpler. Or the data can be interpreted purely based on
* the pixel format without using the palette.
* An example of a pseudo-paletted format is AV_PIX_FMT_GRAY8
*/
#define AV_PIX_FMT_FLAG_PSEUDOPAL (1 << 6)
/**
* The pixel format has an alpha channel. This is set on all formats that
* support alpha in some way. The exception is AV_PIX_FMT_PAL8, which can
* carry alpha as part of the palette. Details are explained in the
* AVPixelFormat enum, and are also encoded in the corresponding
* AVPixFmtDescriptor.
*
* The alpha is always straight, never pre-multiplied.
*
* If a codec or a filter does not support alpha, it should set all alpha to
* opaque, or use the equivalent pixel formats without alpha component, e.g.
* AV_PIX_FMT_RGB0 (or AV_PIX_FMT_RGB24 etc.) instead of AV_PIX_FMT_RGBA.
*/
#define AV_PIX_FMT_FLAG_ALPHA (1 << 7)
/**
* The pixel format is following a Bayer pattern
*/
#define AV_PIX_FMT_FLAG_BAYER (1 << 8)
/**
* The pixel format contains IEEE-754 floating point values. Precision (double,
* single, or half) should be determined by the pixel size (64, 32, or 16 bits).
*/
#define AV_PIX_FMT_FLAG_FLOAT (1 << 9)
/**
* Return the number of bits per pixel used by the pixel format
* described by pixdesc. Note that this is not the same as the number
* of bits per sample.
*
* The returned number of bits refers to the number of bits actually
* used for storing the pixel information, that is padding bits are
* not counted.
*/
int av_get_bits_per_pixel(const AVPixFmtDescriptor *pixdesc);
/**
* Return the number of bits per pixel for the pixel format
* described by pixdesc, including any padding or unused bits.
*/
int av_get_padded_bits_per_pixel(const AVPixFmtDescriptor *pixdesc);
/**
* @return a pixel format descriptor for provided pixel format or NULL if
* this pixel format is unknown.
*/
const AVPixFmtDescriptor *av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt);
/**
* Iterate over all pixel format descriptors known to libavutil.
*
* @param prev previous descriptor. NULL to get the first descriptor.
*
* @return next descriptor or NULL after the last descriptor
*/
const AVPixFmtDescriptor *av_pix_fmt_desc_next(const AVPixFmtDescriptor *prev);
/**
* @return an AVPixelFormat id described by desc, or AV_PIX_FMT_NONE if desc
* is not a valid pointer to a pixel format descriptor.
*/
enum AVPixelFormat av_pix_fmt_desc_get_id(const AVPixFmtDescriptor *desc);
/**
* Utility function to access log2_chroma_w log2_chroma_h from
* the pixel format AVPixFmtDescriptor.
*
* See av_get_chroma_sub_sample() for a function that asserts a
* valid pixel format instead of returning an error code.
* Its recommended that you use avcodec_get_chroma_sub_sample unless
* you do check the return code!
*
* @param[in] pix_fmt the pixel format
* @param[out] h_shift store log2_chroma_w (horizontal/width shift)
* @param[out] v_shift store log2_chroma_h (vertical/height shift)
*
* @return 0 on success, AVERROR(ENOSYS) on invalid or unknown pixel format
*/
int av_pix_fmt_get_chroma_sub_sample(enum AVPixelFormat pix_fmt,
int *h_shift, int *v_shift);
/**
* @return number of planes in pix_fmt, a negative AVERROR if pix_fmt is not a
* valid pixel format.
*/
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt);
/**
* @return the name for provided color range or NULL if unknown.
*/
const char *av_color_range_name(enum AVColorRange range);
/**
* @return the AVColorRange value for name or an AVError if not found.
*/
int av_color_range_from_name(const char *name);
/**
* @return the name for provided color primaries or NULL if unknown.
*/
const char *av_color_primaries_name(enum AVColorPrimaries primaries);
/**
* @return the AVColorPrimaries value for name or an AVError if not found.
*/
int av_color_primaries_from_name(const char *name);
/**
* @return the name for provided color transfer or NULL if unknown.
*/
const char *av_color_transfer_name(enum AVColorTransferCharacteristic transfer);
/**
* @return the AVColorTransferCharacteristic value for name or an AVError if not found.
*/
int av_color_transfer_from_name(const char *name);
/**
* @return the name for provided color space or NULL if unknown.
*/
const char *av_color_space_name(enum AVColorSpace space);
/**
* @return the AVColorSpace value for name or an AVError if not found.
*/
int av_color_space_from_name(const char *name);
/**
* @return the name for provided chroma location or NULL if unknown.
*/
const char *av_chroma_location_name(enum AVChromaLocation location);
/**
* @return the AVChromaLocation value for name or an AVError if not found.
*/
int av_chroma_location_from_name(const char *name);
/**
* Return the pixel format corresponding to name.
*
* If there is no pixel format with name name, then looks for a
* pixel format with the name corresponding to the native endian
* format of name.
* For example in a little-endian system, first looks for "gray16",
* then for "gray16le".
*
* Finally if no pixel format has been found, returns AV_PIX_FMT_NONE.
*/
enum AVPixelFormat av_get_pix_fmt(const char *name);
/**
* Return the short name for a pixel format, NULL in case pix_fmt is
* unknown.
*
* @see av_get_pix_fmt(), av_get_pix_fmt_string()
*/
const char *av_get_pix_fmt_name(enum AVPixelFormat pix_fmt);
/**
* Print in buf the string corresponding to the pixel format with
* number pix_fmt, or a header if pix_fmt is negative.
*
* @param buf the buffer where to write the string
* @param buf_size the size of buf
* @param pix_fmt the number of the pixel format to print the
* corresponding info string, or a negative value to print the
* corresponding header.
*/
char *av_get_pix_fmt_string(char *buf, int buf_size,
enum AVPixelFormat pix_fmt);
/**
* Read a line from an image, and write the values of the
* pixel format component c to dst.
*
* @param data the array containing the pointers to the planes of the image
* @param linesize the array containing the linesizes of the image
* @param desc the pixel format descriptor for the image
* @param x the horizontal coordinate of the first pixel to read
* @param y the vertical coordinate of the first pixel to read
* @param w the width of the line to read, that is the number of
* values to write to dst
* @param read_pal_component if not zero and the format is a paletted
* format writes the values corresponding to the palette
* component c in data[1] to dst, rather than the palette indexes in
* data[0]. The behavior is undefined if the format is not paletted.
*/
void av_read_image_line(uint16_t *dst, const uint8_t *data[4],
const int linesize[4], const AVPixFmtDescriptor *desc,
int x, int y, int c, int w, int read_pal_component);
/**
* Write the values from src to the pixel format component c of an
* image line.
*
* @param src array containing the values to write
* @param data the array containing the pointers to the planes of the
* image to write into. It is supposed to be zeroed.
* @param linesize the array containing the linesizes of the image
* @param desc the pixel format descriptor for the image
* @param x the horizontal coordinate of the first pixel to write
* @param y the vertical coordinate of the first pixel to write
* @param w the width of the line to write, that is the number of
* values to write to the image line
*/
void av_write_image_line(const uint16_t *src, uint8_t *data[4],
const int linesize[4], const AVPixFmtDescriptor *desc,
int x, int y, int c, int w);
/**
* Utility function to swap the endianness of a pixel format.
*
* @param[in] pix_fmt the pixel format
*
* @return pixel format with swapped endianness if it exists,
* otherwise AV_PIX_FMT_NONE
*/
enum AVPixelFormat av_pix_fmt_swap_endianness(enum AVPixelFormat pix_fmt);
#define FF_LOSS_RESOLUTION 0x0001 /**< loss due to resolution change */
#define FF_LOSS_DEPTH 0x0002 /**< loss due to color depth change */
#define FF_LOSS_COLORSPACE 0x0004 /**< loss due to color space conversion */
#define FF_LOSS_ALPHA 0x0008 /**< loss of alpha bits */
#define FF_LOSS_COLORQUANT 0x0010 /**< loss due to color quantization */
#define FF_LOSS_CHROMA 0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
/**
* Compute what kind of losses will occur when converting from one specific
* pixel format to another.
* When converting from one pixel format to another, information loss may occur.
* For example, when converting from RGB24 to GRAY, the color information will
* be lost. Similarly, other losses occur when converting from some formats to
* other formats. These losses can involve loss of chroma, but also loss of
* resolution, loss of color depth, loss due to the color space conversion, loss
* of the alpha bits or loss due to color quantization.
* av_get_fix_fmt_loss() informs you about the various types of losses
* which will occur when converting from one pixel format to another.
*
* @param[in] dst_pix_fmt destination pixel format
* @param[in] src_pix_fmt source pixel format
* @param[in] has_alpha Whether the source pixel format alpha channel is used.
* @return Combination of flags informing you what kind of losses will occur
* (maximum loss for an invalid dst_pix_fmt).
*/
int av_get_pix_fmt_loss(enum AVPixelFormat dst_pix_fmt,
enum AVPixelFormat src_pix_fmt,
int has_alpha);
/**
* Compute what kind of losses will occur when converting from one specific
* pixel format to another.
* When converting from one pixel format to another, information loss may occur.
* For example, when converting from RGB24 to GRAY, the color information will
* be lost. Similarly, other losses occur when converting from some formats to
* other formats. These losses can involve loss of chroma, but also loss of
* resolution, loss of color depth, loss due to the color space conversion, loss
* of the alpha bits or loss due to color quantization.
* av_get_fix_fmt_loss() informs you about the various types of losses
* which will occur when converting from one pixel format to another.
*
* @param[in] dst_pix_fmt destination pixel format
* @param[in] src_pix_fmt source pixel format
* @param[in] has_alpha Whether the source pixel format alpha channel is used.
* @return Combination of flags informing you what kind of losses will occur
* (maximum loss for an invalid dst_pix_fmt).
*/
enum AVPixelFormat av_find_best_pix_fmt_of_2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2,
enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr);
#endif /* AVUTIL_PIXDESC_H */

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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_PIXELUTILS_H
#define AVUTIL_PIXELUTILS_H
#include <stddef.h>
#include <stdint.h>
#include "common.h"
/**
* Sum of abs(src1[x] - src2[x])
*/
typedef int (*av_pixelutils_sad_fn)(const uint8_t *src1, ptrdiff_t stride1,
const uint8_t *src2, ptrdiff_t stride2);
/**
* Get a potentially optimized pointer to a Sum-of-absolute-differences
* function (see the av_pixelutils_sad_fn prototype).
*
* @param w_bits 1<<w_bits is the requested width of the block size
* @param h_bits 1<<h_bits is the requested height of the block size
* @param aligned If set to 2, the returned sad function will assume src1 and
* src2 addresses are aligned on the block size.
* If set to 1, the returned sad function will assume src1 is
* aligned on the block size.
* If set to 0, the returned sad function assume no particular
* alignment.
* @param log_ctx context used for logging, can be NULL
*
* @return a pointer to the SAD function or NULL in case of error (because of
* invalid parameters)
*/
av_pixelutils_sad_fn av_pixelutils_get_sad_fn(int w_bits, int h_bits,
int aligned, void *log_ctx);
#endif /* AVUTIL_PIXELUTILS_H */

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/*
* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_PIXFMT_H
#define AVUTIL_PIXFMT_H
/**
* @file
* pixel format definitions
*/
#include "libavutil/avconfig.h"
#include "version.h"
#define AVPALETTE_SIZE 1024
#define AVPALETTE_COUNT 256
/**
* Pixel format.
*
* @note
* AV_PIX_FMT_RGB32 is handled in an endian-specific manner. An RGBA
* color is put together as:
* (A << 24) | (R << 16) | (G << 8) | B
* This is stored as BGRA on little-endian CPU architectures and ARGB on
* big-endian CPUs.
*
* @note
* If the resolution is not a multiple of the chroma subsampling factor
* then the chroma plane resolution must be rounded up.
*
* @par
* When the pixel format is palettized RGB32 (AV_PIX_FMT_PAL8), the palettized
* image data is stored in AVFrame.data[0]. The palette is transported in
* AVFrame.data[1], is 1024 bytes long (256 4-byte entries) and is
* formatted the same as in AV_PIX_FMT_RGB32 described above (i.e., it is
* also endian-specific). Note also that the individual RGB32 palette
* components stored in AVFrame.data[1] should be in the range 0..255.
* This is important as many custom PAL8 video codecs that were designed
* to run on the IBM VGA graphics adapter use 6-bit palette components.
*
* @par
* For all the 8 bits per pixel formats, an RGB32 palette is in data[1] like
* for pal8. This palette is filled in automatically by the function
* allocating the picture.
*/
enum AVPixelFormat {
AV_PIX_FMT_NONE = -1,
AV_PIX_FMT_YUV420P, ///< planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
AV_PIX_FMT_YUYV422, ///< packed YUV 4:2:2, 16bpp, Y0 Cb Y1 Cr
AV_PIX_FMT_RGB24, ///< packed RGB 8:8:8, 24bpp, RGBRGB...
AV_PIX_FMT_BGR24, ///< packed RGB 8:8:8, 24bpp, BGRBGR...
AV_PIX_FMT_YUV422P, ///< planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
AV_PIX_FMT_YUV444P, ///< planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
AV_PIX_FMT_YUV410P, ///< planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
AV_PIX_FMT_YUV411P, ///< planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
AV_PIX_FMT_GRAY8, ///< Y , 8bpp
AV_PIX_FMT_MONOWHITE, ///< Y , 1bpp, 0 is white, 1 is black, in each byte pixels are ordered from the msb to the lsb
AV_PIX_FMT_MONOBLACK, ///< Y , 1bpp, 0 is black, 1 is white, in each byte pixels are ordered from the msb to the lsb
AV_PIX_FMT_PAL8, ///< 8 bits with AV_PIX_FMT_RGB32 palette
AV_PIX_FMT_YUVJ420P, ///< planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting color_range
AV_PIX_FMT_YUVJ422P, ///< planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV422P and setting color_range
AV_PIX_FMT_YUVJ444P, ///< planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting color_range
#if FF_API_XVMC
AV_PIX_FMT_XVMC_MPEG2_MC,///< XVideo Motion Acceleration via common packet passing
AV_PIX_FMT_XVMC_MPEG2_IDCT,
AV_PIX_FMT_XVMC = AV_PIX_FMT_XVMC_MPEG2_IDCT,
#endif /* FF_API_XVMC */
AV_PIX_FMT_UYVY422, ///< packed YUV 4:2:2, 16bpp, Cb Y0 Cr Y1
AV_PIX_FMT_UYYVYY411, ///< packed YUV 4:1:1, 12bpp, Cb Y0 Y1 Cr Y2 Y3
AV_PIX_FMT_BGR8, ///< packed RGB 3:3:2, 8bpp, (msb)2B 3G 3R(lsb)
AV_PIX_FMT_BGR4, ///< packed RGB 1:2:1 bitstream, 4bpp, (msb)1B 2G 1R(lsb), a byte contains two pixels, the first pixel in the byte is the one composed by the 4 msb bits
AV_PIX_FMT_BGR4_BYTE, ///< packed RGB 1:2:1, 8bpp, (msb)1B 2G 1R(lsb)
AV_PIX_FMT_RGB8, ///< packed RGB 3:3:2, 8bpp, (msb)2R 3G 3B(lsb)
AV_PIX_FMT_RGB4, ///< packed RGB 1:2:1 bitstream, 4bpp, (msb)1R 2G 1B(lsb), a byte contains two pixels, the first pixel in the byte is the one composed by the 4 msb bits
AV_PIX_FMT_RGB4_BYTE, ///< packed RGB 1:2:1, 8bpp, (msb)1R 2G 1B(lsb)
AV_PIX_FMT_NV12, ///< planar YUV 4:2:0, 12bpp, 1 plane for Y and 1 plane for the UV components, which are interleaved (first byte U and the following byte V)
AV_PIX_FMT_NV21, ///< as above, but U and V bytes are swapped
AV_PIX_FMT_ARGB, ///< packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
AV_PIX_FMT_RGBA, ///< packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
AV_PIX_FMT_ABGR, ///< packed ABGR 8:8:8:8, 32bpp, ABGRABGR...
AV_PIX_FMT_BGRA, ///< packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
AV_PIX_FMT_GRAY16BE, ///< Y , 16bpp, big-endian
AV_PIX_FMT_GRAY16LE, ///< Y , 16bpp, little-endian
AV_PIX_FMT_YUV440P, ///< planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
AV_PIX_FMT_YUVJ440P, ///< planar YUV 4:4:0 full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV440P and setting color_range
AV_PIX_FMT_YUVA420P, ///< planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
#if FF_API_VDPAU
AV_PIX_FMT_VDPAU_H264,///< H.264 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstream of the slices as well as various fields extracted from headers
AV_PIX_FMT_VDPAU_MPEG1,///< MPEG-1 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstream of the slices as well as various fields extracted from headers
AV_PIX_FMT_VDPAU_MPEG2,///< MPEG-2 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstream of the slices as well as various fields extracted from headers
AV_PIX_FMT_VDPAU_WMV3,///< WMV3 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstream of the slices as well as various fields extracted from headers
AV_PIX_FMT_VDPAU_VC1, ///< VC-1 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstream of the slices as well as various fields extracted from headers
#endif
AV_PIX_FMT_RGB48BE, ///< packed RGB 16:16:16, 48bpp, 16R, 16G, 16B, the 2-byte value for each R/G/B component is stored as big-endian
AV_PIX_FMT_RGB48LE, ///< packed RGB 16:16:16, 48bpp, 16R, 16G, 16B, the 2-byte value for each R/G/B component is stored as little-endian
AV_PIX_FMT_RGB565BE, ///< packed RGB 5:6:5, 16bpp, (msb) 5R 6G 5B(lsb), big-endian
AV_PIX_FMT_RGB565LE, ///< packed RGB 5:6:5, 16bpp, (msb) 5R 6G 5B(lsb), little-endian
AV_PIX_FMT_RGB555BE, ///< packed RGB 5:5:5, 16bpp, (msb)1X 5R 5G 5B(lsb), big-endian , X=unused/undefined
AV_PIX_FMT_RGB555LE, ///< packed RGB 5:5:5, 16bpp, (msb)1X 5R 5G 5B(lsb), little-endian, X=unused/undefined
AV_PIX_FMT_BGR565BE, ///< packed BGR 5:6:5, 16bpp, (msb) 5B 6G 5R(lsb), big-endian
AV_PIX_FMT_BGR565LE, ///< packed BGR 5:6:5, 16bpp, (msb) 5B 6G 5R(lsb), little-endian
AV_PIX_FMT_BGR555BE, ///< packed BGR 5:5:5, 16bpp, (msb)1X 5B 5G 5R(lsb), big-endian , X=unused/undefined
AV_PIX_FMT_BGR555LE, ///< packed BGR 5:5:5, 16bpp, (msb)1X 5B 5G 5R(lsb), little-endian, X=unused/undefined
#if FF_API_VAAPI
/** @name Deprecated pixel formats */
/**@{*/
AV_PIX_FMT_VAAPI_MOCO, ///< HW acceleration through VA API at motion compensation entry-point, Picture.data[3] contains a vaapi_render_state struct which contains macroblocks as well as various fields extracted from headers
AV_PIX_FMT_VAAPI_IDCT, ///< HW acceleration through VA API at IDCT entry-point, Picture.data[3] contains a vaapi_render_state struct which contains fields extracted from headers
AV_PIX_FMT_VAAPI_VLD, ///< HW decoding through VA API, Picture.data[3] contains a VASurfaceID
/**@}*/
AV_PIX_FMT_VAAPI = AV_PIX_FMT_VAAPI_VLD,
#else
/**
* Hardware acceleration through VA-API, data[3] contains a
* VASurfaceID.
*/
AV_PIX_FMT_VAAPI,
#endif
AV_PIX_FMT_YUV420P16LE, ///< planar YUV 4:2:0, 24bpp, (1 Cr & Cb sample per 2x2 Y samples), little-endian
AV_PIX_FMT_YUV420P16BE, ///< planar YUV 4:2:0, 24bpp, (1 Cr & Cb sample per 2x2 Y samples), big-endian
AV_PIX_FMT_YUV422P16LE, ///< planar YUV 4:2:2, 32bpp, (1 Cr & Cb sample per 2x1 Y samples), little-endian
AV_PIX_FMT_YUV422P16BE, ///< planar YUV 4:2:2, 32bpp, (1 Cr & Cb sample per 2x1 Y samples), big-endian
AV_PIX_FMT_YUV444P16LE, ///< planar YUV 4:4:4, 48bpp, (1 Cr & Cb sample per 1x1 Y samples), little-endian
AV_PIX_FMT_YUV444P16BE, ///< planar YUV 4:4:4, 48bpp, (1 Cr & Cb sample per 1x1 Y samples), big-endian
#if FF_API_VDPAU
AV_PIX_FMT_VDPAU_MPEG4, ///< MPEG-4 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstream of the slices as well as various fields extracted from headers
#endif
AV_PIX_FMT_DXVA2_VLD, ///< HW decoding through DXVA2, Picture.data[3] contains a LPDIRECT3DSURFACE9 pointer
AV_PIX_FMT_RGB444LE, ///< packed RGB 4:4:4, 16bpp, (msb)4X 4R 4G 4B(lsb), little-endian, X=unused/undefined
AV_PIX_FMT_RGB444BE, ///< packed RGB 4:4:4, 16bpp, (msb)4X 4R 4G 4B(lsb), big-endian, X=unused/undefined
AV_PIX_FMT_BGR444LE, ///< packed BGR 4:4:4, 16bpp, (msb)4X 4B 4G 4R(lsb), little-endian, X=unused/undefined
AV_PIX_FMT_BGR444BE, ///< packed BGR 4:4:4, 16bpp, (msb)4X 4B 4G 4R(lsb), big-endian, X=unused/undefined
AV_PIX_FMT_YA8, ///< 8 bits gray, 8 bits alpha
AV_PIX_FMT_Y400A = AV_PIX_FMT_YA8, ///< alias for AV_PIX_FMT_YA8
AV_PIX_FMT_GRAY8A= AV_PIX_FMT_YA8, ///< alias for AV_PIX_FMT_YA8
AV_PIX_FMT_BGR48BE, ///< packed RGB 16:16:16, 48bpp, 16B, 16G, 16R, the 2-byte value for each R/G/B component is stored as big-endian
AV_PIX_FMT_BGR48LE, ///< packed RGB 16:16:16, 48bpp, 16B, 16G, 16R, the 2-byte value for each R/G/B component is stored as little-endian
/**
* The following 12 formats have the disadvantage of needing 1 format for each bit depth.
* Notice that each 9/10 bits sample is stored in 16 bits with extra padding.
* If you want to support multiple bit depths, then using AV_PIX_FMT_YUV420P16* with the bpp stored separately is better.
*/
AV_PIX_FMT_YUV420P9BE, ///< planar YUV 4:2:0, 13.5bpp, (1 Cr & Cb sample per 2x2 Y samples), big-endian
AV_PIX_FMT_YUV420P9LE, ///< planar YUV 4:2:0, 13.5bpp, (1 Cr & Cb sample per 2x2 Y samples), little-endian
AV_PIX_FMT_YUV420P10BE,///< planar YUV 4:2:0, 15bpp, (1 Cr & Cb sample per 2x2 Y samples), big-endian
AV_PIX_FMT_YUV420P10LE,///< planar YUV 4:2:0, 15bpp, (1 Cr & Cb sample per 2x2 Y samples), little-endian
AV_PIX_FMT_YUV422P10BE,///< planar YUV 4:2:2, 20bpp, (1 Cr & Cb sample per 2x1 Y samples), big-endian
AV_PIX_FMT_YUV422P10LE,///< planar YUV 4:2:2, 20bpp, (1 Cr & Cb sample per 2x1 Y samples), little-endian
AV_PIX_FMT_YUV444P9BE, ///< planar YUV 4:4:4, 27bpp, (1 Cr & Cb sample per 1x1 Y samples), big-endian
AV_PIX_FMT_YUV444P9LE, ///< planar YUV 4:4:4, 27bpp, (1 Cr & Cb sample per 1x1 Y samples), little-endian
AV_PIX_FMT_YUV444P10BE,///< planar YUV 4:4:4, 30bpp, (1 Cr & Cb sample per 1x1 Y samples), big-endian
AV_PIX_FMT_YUV444P10LE,///< planar YUV 4:4:4, 30bpp, (1 Cr & Cb sample per 1x1 Y samples), little-endian
AV_PIX_FMT_YUV422P9BE, ///< planar YUV 4:2:2, 18bpp, (1 Cr & Cb sample per 2x1 Y samples), big-endian
AV_PIX_FMT_YUV422P9LE, ///< planar YUV 4:2:2, 18bpp, (1 Cr & Cb sample per 2x1 Y samples), little-endian
AV_PIX_FMT_VDA_VLD, ///< hardware decoding through VDA
AV_PIX_FMT_GBRP, ///< planar GBR 4:4:4 24bpp
AV_PIX_FMT_GBR24P = AV_PIX_FMT_GBRP, // alias for #AV_PIX_FMT_GBRP
AV_PIX_FMT_GBRP9BE, ///< planar GBR 4:4:4 27bpp, big-endian
AV_PIX_FMT_GBRP9LE, ///< planar GBR 4:4:4 27bpp, little-endian
AV_PIX_FMT_GBRP10BE, ///< planar GBR 4:4:4 30bpp, big-endian
AV_PIX_FMT_GBRP10LE, ///< planar GBR 4:4:4 30bpp, little-endian
AV_PIX_FMT_GBRP16BE, ///< planar GBR 4:4:4 48bpp, big-endian
AV_PIX_FMT_GBRP16LE, ///< planar GBR 4:4:4 48bpp, little-endian
AV_PIX_FMT_YUVA422P, ///< planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
AV_PIX_FMT_YUVA444P, ///< planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
AV_PIX_FMT_YUVA420P9BE, ///< planar YUV 4:2:0 22.5bpp, (1 Cr & Cb sample per 2x2 Y & A samples), big-endian
AV_PIX_FMT_YUVA420P9LE, ///< planar YUV 4:2:0 22.5bpp, (1 Cr & Cb sample per 2x2 Y & A samples), little-endian
AV_PIX_FMT_YUVA422P9BE, ///< planar YUV 4:2:2 27bpp, (1 Cr & Cb sample per 2x1 Y & A samples), big-endian
AV_PIX_FMT_YUVA422P9LE, ///< planar YUV 4:2:2 27bpp, (1 Cr & Cb sample per 2x1 Y & A samples), little-endian
AV_PIX_FMT_YUVA444P9BE, ///< planar YUV 4:4:4 36bpp, (1 Cr & Cb sample per 1x1 Y & A samples), big-endian
AV_PIX_FMT_YUVA444P9LE, ///< planar YUV 4:4:4 36bpp, (1 Cr & Cb sample per 1x1 Y & A samples), little-endian
AV_PIX_FMT_YUVA420P10BE, ///< planar YUV 4:2:0 25bpp, (1 Cr & Cb sample per 2x2 Y & A samples, big-endian)
AV_PIX_FMT_YUVA420P10LE, ///< planar YUV 4:2:0 25bpp, (1 Cr & Cb sample per 2x2 Y & A samples, little-endian)
AV_PIX_FMT_YUVA422P10BE, ///< planar YUV 4:2:2 30bpp, (1 Cr & Cb sample per 2x1 Y & A samples, big-endian)
AV_PIX_FMT_YUVA422P10LE, ///< planar YUV 4:2:2 30bpp, (1 Cr & Cb sample per 2x1 Y & A samples, little-endian)
AV_PIX_FMT_YUVA444P10BE, ///< planar YUV 4:4:4 40bpp, (1 Cr & Cb sample per 1x1 Y & A samples, big-endian)
AV_PIX_FMT_YUVA444P10LE, ///< planar YUV 4:4:4 40bpp, (1 Cr & Cb sample per 1x1 Y & A samples, little-endian)
AV_PIX_FMT_YUVA420P16BE, ///< planar YUV 4:2:0 40bpp, (1 Cr & Cb sample per 2x2 Y & A samples, big-endian)
AV_PIX_FMT_YUVA420P16LE, ///< planar YUV 4:2:0 40bpp, (1 Cr & Cb sample per 2x2 Y & A samples, little-endian)
AV_PIX_FMT_YUVA422P16BE, ///< planar YUV 4:2:2 48bpp, (1 Cr & Cb sample per 2x1 Y & A samples, big-endian)
AV_PIX_FMT_YUVA422P16LE, ///< planar YUV 4:2:2 48bpp, (1 Cr & Cb sample per 2x1 Y & A samples, little-endian)
AV_PIX_FMT_YUVA444P16BE, ///< planar YUV 4:4:4 64bpp, (1 Cr & Cb sample per 1x1 Y & A samples, big-endian)
AV_PIX_FMT_YUVA444P16LE, ///< planar YUV 4:4:4 64bpp, (1 Cr & Cb sample per 1x1 Y & A samples, little-endian)
AV_PIX_FMT_VDPAU, ///< HW acceleration through VDPAU, Picture.data[3] contains a VdpVideoSurface
AV_PIX_FMT_XYZ12LE, ///< packed XYZ 4:4:4, 36 bpp, (msb) 12X, 12Y, 12Z (lsb), the 2-byte value for each X/Y/Z is stored as little-endian, the 4 lower bits are set to 0
AV_PIX_FMT_XYZ12BE, ///< packed XYZ 4:4:4, 36 bpp, (msb) 12X, 12Y, 12Z (lsb), the 2-byte value for each X/Y/Z is stored as big-endian, the 4 lower bits are set to 0
AV_PIX_FMT_NV16, ///< interleaved chroma YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
AV_PIX_FMT_NV20LE, ///< interleaved chroma YUV 4:2:2, 20bpp, (1 Cr & Cb sample per 2x1 Y samples), little-endian
AV_PIX_FMT_NV20BE, ///< interleaved chroma YUV 4:2:2, 20bpp, (1 Cr & Cb sample per 2x1 Y samples), big-endian
AV_PIX_FMT_RGBA64BE, ///< packed RGBA 16:16:16:16, 64bpp, 16R, 16G, 16B, 16A, the 2-byte value for each R/G/B/A component is stored as big-endian
AV_PIX_FMT_RGBA64LE, ///< packed RGBA 16:16:16:16, 64bpp, 16R, 16G, 16B, 16A, the 2-byte value for each R/G/B/A component is stored as little-endian
AV_PIX_FMT_BGRA64BE, ///< packed RGBA 16:16:16:16, 64bpp, 16B, 16G, 16R, 16A, the 2-byte value for each R/G/B/A component is stored as big-endian
AV_PIX_FMT_BGRA64LE, ///< packed RGBA 16:16:16:16, 64bpp, 16B, 16G, 16R, 16A, the 2-byte value for each R/G/B/A component is stored as little-endian
AV_PIX_FMT_YVYU422, ///< packed YUV 4:2:2, 16bpp, Y0 Cr Y1 Cb
AV_PIX_FMT_VDA, ///< HW acceleration through VDA, data[3] contains a CVPixelBufferRef
AV_PIX_FMT_YA16BE, ///< 16 bits gray, 16 bits alpha (big-endian)
AV_PIX_FMT_YA16LE, ///< 16 bits gray, 16 bits alpha (little-endian)
AV_PIX_FMT_GBRAP, ///< planar GBRA 4:4:4:4 32bpp
AV_PIX_FMT_GBRAP16BE, ///< planar GBRA 4:4:4:4 64bpp, big-endian
AV_PIX_FMT_GBRAP16LE, ///< planar GBRA 4:4:4:4 64bpp, little-endian
/**
* HW acceleration through QSV, data[3] contains a pointer to the
* mfxFrameSurface1 structure.
*/
AV_PIX_FMT_QSV,
/**
* HW acceleration though MMAL, data[3] contains a pointer to the
* MMAL_BUFFER_HEADER_T structure.
*/
AV_PIX_FMT_MMAL,
AV_PIX_FMT_D3D11VA_VLD, ///< HW decoding through Direct3D11 via old API, Picture.data[3] contains a ID3D11VideoDecoderOutputView pointer
/**
* HW acceleration through CUDA. data[i] contain CUdeviceptr pointers
* exactly as for system memory frames.
*/
AV_PIX_FMT_CUDA,
AV_PIX_FMT_0RGB=0x123+4,///< packed RGB 8:8:8, 32bpp, XRGBXRGB... X=unused/undefined
AV_PIX_FMT_RGB0, ///< packed RGB 8:8:8, 32bpp, RGBXRGBX... X=unused/undefined
AV_PIX_FMT_0BGR, ///< packed BGR 8:8:8, 32bpp, XBGRXBGR... X=unused/undefined
AV_PIX_FMT_BGR0, ///< packed BGR 8:8:8, 32bpp, BGRXBGRX... X=unused/undefined
AV_PIX_FMT_YUV420P12BE, ///< planar YUV 4:2:0,18bpp, (1 Cr & Cb sample per 2x2 Y samples), big-endian
AV_PIX_FMT_YUV420P12LE, ///< planar YUV 4:2:0,18bpp, (1 Cr & Cb sample per 2x2 Y samples), little-endian
AV_PIX_FMT_YUV420P14BE, ///< planar YUV 4:2:0,21bpp, (1 Cr & Cb sample per 2x2 Y samples), big-endian
AV_PIX_FMT_YUV420P14LE, ///< planar YUV 4:2:0,21bpp, (1 Cr & Cb sample per 2x2 Y samples), little-endian
AV_PIX_FMT_YUV422P12BE, ///< planar YUV 4:2:2,24bpp, (1 Cr & Cb sample per 2x1 Y samples), big-endian
AV_PIX_FMT_YUV422P12LE, ///< planar YUV 4:2:2,24bpp, (1 Cr & Cb sample per 2x1 Y samples), little-endian
AV_PIX_FMT_YUV422P14BE, ///< planar YUV 4:2:2,28bpp, (1 Cr & Cb sample per 2x1 Y samples), big-endian
AV_PIX_FMT_YUV422P14LE, ///< planar YUV 4:2:2,28bpp, (1 Cr & Cb sample per 2x1 Y samples), little-endian
AV_PIX_FMT_YUV444P12BE, ///< planar YUV 4:4:4,36bpp, (1 Cr & Cb sample per 1x1 Y samples), big-endian
AV_PIX_FMT_YUV444P12LE, ///< planar YUV 4:4:4,36bpp, (1 Cr & Cb sample per 1x1 Y samples), little-endian
AV_PIX_FMT_YUV444P14BE, ///< planar YUV 4:4:4,42bpp, (1 Cr & Cb sample per 1x1 Y samples), big-endian
AV_PIX_FMT_YUV444P14LE, ///< planar YUV 4:4:4,42bpp, (1 Cr & Cb sample per 1x1 Y samples), little-endian
AV_PIX_FMT_GBRP12BE, ///< planar GBR 4:4:4 36bpp, big-endian
AV_PIX_FMT_GBRP12LE, ///< planar GBR 4:4:4 36bpp, little-endian
AV_PIX_FMT_GBRP14BE, ///< planar GBR 4:4:4 42bpp, big-endian
AV_PIX_FMT_GBRP14LE, ///< planar GBR 4:4:4 42bpp, little-endian
AV_PIX_FMT_YUVJ411P, ///< planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples) full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV411P and setting color_range
AV_PIX_FMT_BAYER_BGGR8, ///< bayer, BGBG..(odd line), GRGR..(even line), 8-bit samples */
AV_PIX_FMT_BAYER_RGGB8, ///< bayer, RGRG..(odd line), GBGB..(even line), 8-bit samples */
AV_PIX_FMT_BAYER_GBRG8, ///< bayer, GBGB..(odd line), RGRG..(even line), 8-bit samples */
AV_PIX_FMT_BAYER_GRBG8, ///< bayer, GRGR..(odd line), BGBG..(even line), 8-bit samples */
AV_PIX_FMT_BAYER_BGGR16LE, ///< bayer, BGBG..(odd line), GRGR..(even line), 16-bit samples, little-endian */
AV_PIX_FMT_BAYER_BGGR16BE, ///< bayer, BGBG..(odd line), GRGR..(even line), 16-bit samples, big-endian */
AV_PIX_FMT_BAYER_RGGB16LE, ///< bayer, RGRG..(odd line), GBGB..(even line), 16-bit samples, little-endian */
AV_PIX_FMT_BAYER_RGGB16BE, ///< bayer, RGRG..(odd line), GBGB..(even line), 16-bit samples, big-endian */
AV_PIX_FMT_BAYER_GBRG16LE, ///< bayer, GBGB..(odd line), RGRG..(even line), 16-bit samples, little-endian */
AV_PIX_FMT_BAYER_GBRG16BE, ///< bayer, GBGB..(odd line), RGRG..(even line), 16-bit samples, big-endian */
AV_PIX_FMT_BAYER_GRBG16LE, ///< bayer, GRGR..(odd line), BGBG..(even line), 16-bit samples, little-endian */
AV_PIX_FMT_BAYER_GRBG16BE, ///< bayer, GRGR..(odd line), BGBG..(even line), 16-bit samples, big-endian */
#if !FF_API_XVMC
AV_PIX_FMT_XVMC,///< XVideo Motion Acceleration via common packet passing
#endif /* !FF_API_XVMC */
AV_PIX_FMT_YUV440P10LE, ///< planar YUV 4:4:0,20bpp, (1 Cr & Cb sample per 1x2 Y samples), little-endian
AV_PIX_FMT_YUV440P10BE, ///< planar YUV 4:4:0,20bpp, (1 Cr & Cb sample per 1x2 Y samples), big-endian
AV_PIX_FMT_YUV440P12LE, ///< planar YUV 4:4:0,24bpp, (1 Cr & Cb sample per 1x2 Y samples), little-endian
AV_PIX_FMT_YUV440P12BE, ///< planar YUV 4:4:0,24bpp, (1 Cr & Cb sample per 1x2 Y samples), big-endian
AV_PIX_FMT_AYUV64LE, ///< packed AYUV 4:4:4,64bpp (1 Cr & Cb sample per 1x1 Y & A samples), little-endian
AV_PIX_FMT_AYUV64BE, ///< packed AYUV 4:4:4,64bpp (1 Cr & Cb sample per 1x1 Y & A samples), big-endian
AV_PIX_FMT_VIDEOTOOLBOX, ///< hardware decoding through Videotoolbox
AV_PIX_FMT_P010LE, ///< like NV12, with 10bpp per component, data in the high bits, zeros in the low bits, little-endian
AV_PIX_FMT_P010BE, ///< like NV12, with 10bpp per component, data in the high bits, zeros in the low bits, big-endian
AV_PIX_FMT_GBRAP12BE, ///< planar GBR 4:4:4:4 48bpp, big-endian
AV_PIX_FMT_GBRAP12LE, ///< planar GBR 4:4:4:4 48bpp, little-endian
AV_PIX_FMT_GBRAP10BE, ///< planar GBR 4:4:4:4 40bpp, big-endian
AV_PIX_FMT_GBRAP10LE, ///< planar GBR 4:4:4:4 40bpp, little-endian
AV_PIX_FMT_MEDIACODEC, ///< hardware decoding through MediaCodec
AV_PIX_FMT_GRAY12BE, ///< Y , 12bpp, big-endian
AV_PIX_FMT_GRAY12LE, ///< Y , 12bpp, little-endian
AV_PIX_FMT_GRAY10BE, ///< Y , 10bpp, big-endian
AV_PIX_FMT_GRAY10LE, ///< Y , 10bpp, little-endian
AV_PIX_FMT_P016LE, ///< like NV12, with 16bpp per component, little-endian
AV_PIX_FMT_P016BE, ///< like NV12, with 16bpp per component, big-endian
/**
* Hardware surfaces for Direct3D11.
*
* This is preferred over the legacy AV_PIX_FMT_D3D11VA_VLD. The new D3D11
* hwaccel API and filtering support AV_PIX_FMT_D3D11 only.
*
* data[0] contains a ID3D11Texture2D pointer, and data[1] contains the
* texture array index of the frame as intptr_t if the ID3D11Texture2D is
* an array texture (or always 0 if it's a normal texture).
*/
AV_PIX_FMT_D3D11,
AV_PIX_FMT_GRAY9BE, ///< Y , 9bpp, big-endian
AV_PIX_FMT_GRAY9LE, ///< Y , 9bpp, little-endian
AV_PIX_FMT_GBRPF32BE, ///< IEEE-754 single precision planar GBR 4:4:4, 96bpp, big-endian
AV_PIX_FMT_GBRPF32LE, ///< IEEE-754 single precision planar GBR 4:4:4, 96bpp, little-endian
AV_PIX_FMT_GBRAPF32BE, ///< IEEE-754 single precision planar GBRA 4:4:4:4, 128bpp, big-endian
AV_PIX_FMT_GBRAPF32LE, ///< IEEE-754 single precision planar GBRA 4:4:4:4, 128bpp, little-endian
/**
* DRM-managed buffers exposed through PRIME buffer sharing.
*
* data[0] points to an AVDRMFrameDescriptor.
*/
AV_PIX_FMT_DRM_PRIME,
AV_PIX_FMT_NB ///< number of pixel formats, DO NOT USE THIS if you want to link with shared libav* because the number of formats might differ between versions
};
#if AV_HAVE_BIGENDIAN
# define AV_PIX_FMT_NE(be, le) AV_PIX_FMT_##be
#else
# define AV_PIX_FMT_NE(be, le) AV_PIX_FMT_##le
#endif
#define AV_PIX_FMT_RGB32 AV_PIX_FMT_NE(ARGB, BGRA)
#define AV_PIX_FMT_RGB32_1 AV_PIX_FMT_NE(RGBA, ABGR)
#define AV_PIX_FMT_BGR32 AV_PIX_FMT_NE(ABGR, RGBA)
#define AV_PIX_FMT_BGR32_1 AV_PIX_FMT_NE(BGRA, ARGB)
#define AV_PIX_FMT_0RGB32 AV_PIX_FMT_NE(0RGB, BGR0)
#define AV_PIX_FMT_0BGR32 AV_PIX_FMT_NE(0BGR, RGB0)
#define AV_PIX_FMT_GRAY9 AV_PIX_FMT_NE(GRAY9BE, GRAY9LE)
#define AV_PIX_FMT_GRAY10 AV_PIX_FMT_NE(GRAY10BE, GRAY10LE)
#define AV_PIX_FMT_GRAY12 AV_PIX_FMT_NE(GRAY12BE, GRAY12LE)
#define AV_PIX_FMT_GRAY16 AV_PIX_FMT_NE(GRAY16BE, GRAY16LE)
#define AV_PIX_FMT_YA16 AV_PIX_FMT_NE(YA16BE, YA16LE)
#define AV_PIX_FMT_RGB48 AV_PIX_FMT_NE(RGB48BE, RGB48LE)
#define AV_PIX_FMT_RGB565 AV_PIX_FMT_NE(RGB565BE, RGB565LE)
#define AV_PIX_FMT_RGB555 AV_PIX_FMT_NE(RGB555BE, RGB555LE)
#define AV_PIX_FMT_RGB444 AV_PIX_FMT_NE(RGB444BE, RGB444LE)
#define AV_PIX_FMT_RGBA64 AV_PIX_FMT_NE(RGBA64BE, RGBA64LE)
#define AV_PIX_FMT_BGR48 AV_PIX_FMT_NE(BGR48BE, BGR48LE)
#define AV_PIX_FMT_BGR565 AV_PIX_FMT_NE(BGR565BE, BGR565LE)
#define AV_PIX_FMT_BGR555 AV_PIX_FMT_NE(BGR555BE, BGR555LE)
#define AV_PIX_FMT_BGR444 AV_PIX_FMT_NE(BGR444BE, BGR444LE)
#define AV_PIX_FMT_BGRA64 AV_PIX_FMT_NE(BGRA64BE, BGRA64LE)
#define AV_PIX_FMT_YUV420P9 AV_PIX_FMT_NE(YUV420P9BE , YUV420P9LE)
#define AV_PIX_FMT_YUV422P9 AV_PIX_FMT_NE(YUV422P9BE , YUV422P9LE)
#define AV_PIX_FMT_YUV444P9 AV_PIX_FMT_NE(YUV444P9BE , YUV444P9LE)
#define AV_PIX_FMT_YUV420P10 AV_PIX_FMT_NE(YUV420P10BE, YUV420P10LE)
#define AV_PIX_FMT_YUV422P10 AV_PIX_FMT_NE(YUV422P10BE, YUV422P10LE)
#define AV_PIX_FMT_YUV440P10 AV_PIX_FMT_NE(YUV440P10BE, YUV440P10LE)
#define AV_PIX_FMT_YUV444P10 AV_PIX_FMT_NE(YUV444P10BE, YUV444P10LE)
#define AV_PIX_FMT_YUV420P12 AV_PIX_FMT_NE(YUV420P12BE, YUV420P12LE)
#define AV_PIX_FMT_YUV422P12 AV_PIX_FMT_NE(YUV422P12BE, YUV422P12LE)
#define AV_PIX_FMT_YUV440P12 AV_PIX_FMT_NE(YUV440P12BE, YUV440P12LE)
#define AV_PIX_FMT_YUV444P12 AV_PIX_FMT_NE(YUV444P12BE, YUV444P12LE)
#define AV_PIX_FMT_YUV420P14 AV_PIX_FMT_NE(YUV420P14BE, YUV420P14LE)
#define AV_PIX_FMT_YUV422P14 AV_PIX_FMT_NE(YUV422P14BE, YUV422P14LE)
#define AV_PIX_FMT_YUV444P14 AV_PIX_FMT_NE(YUV444P14BE, YUV444P14LE)
#define AV_PIX_FMT_YUV420P16 AV_PIX_FMT_NE(YUV420P16BE, YUV420P16LE)
#define AV_PIX_FMT_YUV422P16 AV_PIX_FMT_NE(YUV422P16BE, YUV422P16LE)
#define AV_PIX_FMT_YUV444P16 AV_PIX_FMT_NE(YUV444P16BE, YUV444P16LE)
#define AV_PIX_FMT_GBRP9 AV_PIX_FMT_NE(GBRP9BE , GBRP9LE)
#define AV_PIX_FMT_GBRP10 AV_PIX_FMT_NE(GBRP10BE, GBRP10LE)
#define AV_PIX_FMT_GBRP12 AV_PIX_FMT_NE(GBRP12BE, GBRP12LE)
#define AV_PIX_FMT_GBRP14 AV_PIX_FMT_NE(GBRP14BE, GBRP14LE)
#define AV_PIX_FMT_GBRP16 AV_PIX_FMT_NE(GBRP16BE, GBRP16LE)
#define AV_PIX_FMT_GBRAP10 AV_PIX_FMT_NE(GBRAP10BE, GBRAP10LE)
#define AV_PIX_FMT_GBRAP12 AV_PIX_FMT_NE(GBRAP12BE, GBRAP12LE)
#define AV_PIX_FMT_GBRAP16 AV_PIX_FMT_NE(GBRAP16BE, GBRAP16LE)
#define AV_PIX_FMT_BAYER_BGGR16 AV_PIX_FMT_NE(BAYER_BGGR16BE, BAYER_BGGR16LE)
#define AV_PIX_FMT_BAYER_RGGB16 AV_PIX_FMT_NE(BAYER_RGGB16BE, BAYER_RGGB16LE)
#define AV_PIX_FMT_BAYER_GBRG16 AV_PIX_FMT_NE(BAYER_GBRG16BE, BAYER_GBRG16LE)
#define AV_PIX_FMT_BAYER_GRBG16 AV_PIX_FMT_NE(BAYER_GRBG16BE, BAYER_GRBG16LE)
#define AV_PIX_FMT_GBRPF32 AV_PIX_FMT_NE(GBRPF32BE, GBRPF32LE)
#define AV_PIX_FMT_GBRAPF32 AV_PIX_FMT_NE(GBRAPF32BE, GBRAPF32LE)
#define AV_PIX_FMT_YUVA420P9 AV_PIX_FMT_NE(YUVA420P9BE , YUVA420P9LE)
#define AV_PIX_FMT_YUVA422P9 AV_PIX_FMT_NE(YUVA422P9BE , YUVA422P9LE)
#define AV_PIX_FMT_YUVA444P9 AV_PIX_FMT_NE(YUVA444P9BE , YUVA444P9LE)
#define AV_PIX_FMT_YUVA420P10 AV_PIX_FMT_NE(YUVA420P10BE, YUVA420P10LE)
#define AV_PIX_FMT_YUVA422P10 AV_PIX_FMT_NE(YUVA422P10BE, YUVA422P10LE)
#define AV_PIX_FMT_YUVA444P10 AV_PIX_FMT_NE(YUVA444P10BE, YUVA444P10LE)
#define AV_PIX_FMT_YUVA420P16 AV_PIX_FMT_NE(YUVA420P16BE, YUVA420P16LE)
#define AV_PIX_FMT_YUVA422P16 AV_PIX_FMT_NE(YUVA422P16BE, YUVA422P16LE)
#define AV_PIX_FMT_YUVA444P16 AV_PIX_FMT_NE(YUVA444P16BE, YUVA444P16LE)
#define AV_PIX_FMT_XYZ12 AV_PIX_FMT_NE(XYZ12BE, XYZ12LE)
#define AV_PIX_FMT_NV20 AV_PIX_FMT_NE(NV20BE, NV20LE)
#define AV_PIX_FMT_AYUV64 AV_PIX_FMT_NE(AYUV64BE, AYUV64LE)
#define AV_PIX_FMT_P010 AV_PIX_FMT_NE(P010BE, P010LE)
#define AV_PIX_FMT_P016 AV_PIX_FMT_NE(P016BE, P016LE)
/**
* Chromaticity coordinates of the source primaries.
* These values match the ones defined by ISO/IEC 23001-8_2013 § 7.1.
*/
enum AVColorPrimaries {
AVCOL_PRI_RESERVED0 = 0,
AVCOL_PRI_BT709 = 1, ///< also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP177 Annex B
AVCOL_PRI_UNSPECIFIED = 2,
AVCOL_PRI_RESERVED = 3,
AVCOL_PRI_BT470M = 4, ///< also FCC Title 47 Code of Federal Regulations 73.682 (a)(20)
AVCOL_PRI_BT470BG = 5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM
AVCOL_PRI_SMPTE170M = 6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC
AVCOL_PRI_SMPTE240M = 7, ///< functionally identical to above
AVCOL_PRI_FILM = 8, ///< colour filters using Illuminant C
AVCOL_PRI_BT2020 = 9, ///< ITU-R BT2020
AVCOL_PRI_SMPTE428 = 10, ///< SMPTE ST 428-1 (CIE 1931 XYZ)
AVCOL_PRI_SMPTEST428_1 = AVCOL_PRI_SMPTE428,
AVCOL_PRI_SMPTE431 = 11, ///< SMPTE ST 431-2 (2011) / DCI P3
AVCOL_PRI_SMPTE432 = 12, ///< SMPTE ST 432-1 (2010) / P3 D65 / Display P3
AVCOL_PRI_JEDEC_P22 = 22, ///< JEDEC P22 phosphors
AVCOL_PRI_NB ///< Not part of ABI
};
/**
* Color Transfer Characteristic.
* These values match the ones defined by ISO/IEC 23001-8_2013 § 7.2.
*/
enum AVColorTransferCharacteristic {
AVCOL_TRC_RESERVED0 = 0,
AVCOL_TRC_BT709 = 1, ///< also ITU-R BT1361
AVCOL_TRC_UNSPECIFIED = 2,
AVCOL_TRC_RESERVED = 3,
AVCOL_TRC_GAMMA22 = 4, ///< also ITU-R BT470M / ITU-R BT1700 625 PAL & SECAM
AVCOL_TRC_GAMMA28 = 5, ///< also ITU-R BT470BG
AVCOL_TRC_SMPTE170M = 6, ///< also ITU-R BT601-6 525 or 625 / ITU-R BT1358 525 or 625 / ITU-R BT1700 NTSC
AVCOL_TRC_SMPTE240M = 7,
AVCOL_TRC_LINEAR = 8, ///< "Linear transfer characteristics"
AVCOL_TRC_LOG = 9, ///< "Logarithmic transfer characteristic (100:1 range)"
AVCOL_TRC_LOG_SQRT = 10, ///< "Logarithmic transfer characteristic (100 * Sqrt(10) : 1 range)"
AVCOL_TRC_IEC61966_2_4 = 11, ///< IEC 61966-2-4
AVCOL_TRC_BT1361_ECG = 12, ///< ITU-R BT1361 Extended Colour Gamut
AVCOL_TRC_IEC61966_2_1 = 13, ///< IEC 61966-2-1 (sRGB or sYCC)
AVCOL_TRC_BT2020_10 = 14, ///< ITU-R BT2020 for 10-bit system
AVCOL_TRC_BT2020_12 = 15, ///< ITU-R BT2020 for 12-bit system
AVCOL_TRC_SMPTE2084 = 16, ///< SMPTE ST 2084 for 10-, 12-, 14- and 16-bit systems
AVCOL_TRC_SMPTEST2084 = AVCOL_TRC_SMPTE2084,
AVCOL_TRC_SMPTE428 = 17, ///< SMPTE ST 428-1
AVCOL_TRC_SMPTEST428_1 = AVCOL_TRC_SMPTE428,
AVCOL_TRC_ARIB_STD_B67 = 18, ///< ARIB STD-B67, known as "Hybrid log-gamma"
AVCOL_TRC_NB ///< Not part of ABI
};
/**
* YUV colorspace type.
* These values match the ones defined by ISO/IEC 23001-8_2013 § 7.3.
*/
enum AVColorSpace {
AVCOL_SPC_RGB = 0, ///< order of coefficients is actually GBR, also IEC 61966-2-1 (sRGB)
AVCOL_SPC_BT709 = 1, ///< also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
AVCOL_SPC_UNSPECIFIED = 2,
AVCOL_SPC_RESERVED = 3,
AVCOL_SPC_FCC = 4, ///< FCC Title 47 Code of Federal Regulations 73.682 (a)(20)
AVCOL_SPC_BT470BG = 5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM / IEC 61966-2-4 xvYCC601
AVCOL_SPC_SMPTE170M = 6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC
AVCOL_SPC_SMPTE240M = 7, ///< functionally identical to above
AVCOL_SPC_YCGCO = 8, ///< Used by Dirac / VC-2 and H.264 FRext, see ITU-T SG16
AVCOL_SPC_YCOCG = AVCOL_SPC_YCGCO,
AVCOL_SPC_BT2020_NCL = 9, ///< ITU-R BT2020 non-constant luminance system
AVCOL_SPC_BT2020_CL = 10, ///< ITU-R BT2020 constant luminance system
AVCOL_SPC_SMPTE2085 = 11, ///< SMPTE 2085, Y'D'zD'x
AVCOL_SPC_CHROMA_DERIVED_NCL = 12, ///< Chromaticity-derived non-constant luminance system
AVCOL_SPC_CHROMA_DERIVED_CL = 13, ///< Chromaticity-derived constant luminance system
AVCOL_SPC_ICTCP = 14, ///< ITU-R BT.2100-0, ICtCp
AVCOL_SPC_NB ///< Not part of ABI
};
/**
* MPEG vs JPEG YUV range.
*/
enum AVColorRange {
AVCOL_RANGE_UNSPECIFIED = 0,
AVCOL_RANGE_MPEG = 1, ///< the normal 219*2^(n-8) "MPEG" YUV ranges
AVCOL_RANGE_JPEG = 2, ///< the normal 2^n-1 "JPEG" YUV ranges
AVCOL_RANGE_NB ///< Not part of ABI
};
/**
* Location of chroma samples.
*
* Illustration showing the location of the first (top left) chroma sample of the
* image, the left shows only luma, the right
* shows the location of the chroma sample, the 2 could be imagined to overlay
* each other but are drawn separately due to limitations of ASCII
*
* 1st 2nd 1st 2nd horizontal luma sample positions
* v v v v
* ______ ______
*1st luma line > |X X ... |3 4 X ... X are luma samples,
* | |1 2 1-6 are possible chroma positions
*2nd luma line > |X X ... |5 6 X ... 0 is undefined/unknown position
*/
enum AVChromaLocation {
AVCHROMA_LOC_UNSPECIFIED = 0,
AVCHROMA_LOC_LEFT = 1, ///< MPEG-2/4 4:2:0, H.264 default for 4:2:0
AVCHROMA_LOC_CENTER = 2, ///< MPEG-1 4:2:0, JPEG 4:2:0, H.263 4:2:0
AVCHROMA_LOC_TOPLEFT = 3, ///< ITU-R 601, SMPTE 274M 296M S314M(DV 4:1:1), mpeg2 4:2:2
AVCHROMA_LOC_TOP = 4,
AVCHROMA_LOC_BOTTOMLEFT = 5,
AVCHROMA_LOC_BOTTOM = 6,
AVCHROMA_LOC_NB ///< Not part of ABI
};
#endif /* AVUTIL_PIXFMT_H */

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/*
* Copyright (c) 2009 Baptiste Coudurier <baptiste.coudurier@gmail.com>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_RANDOM_SEED_H
#define AVUTIL_RANDOM_SEED_H
#include <stdint.h>
/**
* @addtogroup lavu_crypto
* @{
*/
/**
* Get a seed to use in conjunction with random functions.
* This function tries to provide a good seed at a best effort bases.
* Its possible to call this function multiple times if more bits are needed.
* It can be quite slow, which is why it should only be used as seed for a faster
* PRNG. The quality of the seed depends on the platform.
*/
uint32_t av_get_random_seed(void);
/**
* @}
*/
#endif /* AVUTIL_RANDOM_SEED_H */

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/*
* rational numbers
* Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* @ingroup lavu_math_rational
* Utilties for rational number calculation.
* @author Michael Niedermayer <michaelni@gmx.at>
*/
#ifndef AVUTIL_RATIONAL_H
#define AVUTIL_RATIONAL_H
#include <stdint.h>
#include <limits.h>
#include "attributes.h"
/**
* @defgroup lavu_math_rational AVRational
* @ingroup lavu_math
* Rational number calculation.
*
* While rational numbers can be expressed as floating-point numbers, the
* conversion process is a lossy one, so are floating-point operations. On the
* other hand, the nature of FFmpeg demands highly accurate calculation of
* timestamps. This set of rational number utilities serves as a generic
* interface for manipulating rational numbers as pairs of numerators and
* denominators.
*
* Many of the functions that operate on AVRational's have the suffix `_q`, in
* reference to the mathematical symbol "ℚ" (Q) which denotes the set of all
* rational numbers.
*
* @{
*/
/**
* Rational number (pair of numerator and denominator).
*/
typedef struct AVRational{
int num; ///< Numerator
int den; ///< Denominator
} AVRational;
/**
* Create an AVRational.
*
* Useful for compilers that do not support compound literals.
*
* @note The return value is not reduced.
* @see av_reduce()
*/
static inline AVRational av_make_q(int num, int den)
{
AVRational r = { num, den };
return r;
}
/**
* Compare two rationals.
*
* @param a First rational
* @param b Second rational
*
* @return One of the following values:
* - 0 if `a == b`
* - 1 if `a > b`
* - -1 if `a < b`
* - `INT_MIN` if one of the values is of the form `0 / 0`
*/
static inline int av_cmp_q(AVRational a, AVRational b){
const int64_t tmp= a.num * (int64_t)b.den - b.num * (int64_t)a.den;
if(tmp) return (int)((tmp ^ a.den ^ b.den)>>63)|1;
else if(b.den && a.den) return 0;
else if(a.num && b.num) return (a.num>>31) - (b.num>>31);
else return INT_MIN;
}
/**
* Convert an AVRational to a `double`.
* @param a AVRational to convert
* @return `a` in floating-point form
* @see av_d2q()
*/
static inline double av_q2d(AVRational a){
return a.num / (double) a.den;
}
/**
* Reduce a fraction.
*
* This is useful for framerate calculations.
*
* @param[out] dst_num Destination numerator
* @param[out] dst_den Destination denominator
* @param[in] num Source numerator
* @param[in] den Source denominator
* @param[in] max Maximum allowed values for `dst_num` & `dst_den`
* @return 1 if the operation is exact, 0 otherwise
*/
int av_reduce(int *dst_num, int *dst_den, int64_t num, int64_t den, int64_t max);
/**
* Multiply two rationals.
* @param b First rational
* @param c Second rational
* @return b*c
*/
AVRational av_mul_q(AVRational b, AVRational c) av_const;
/**
* Divide one rational by another.
* @param b First rational
* @param c Second rational
* @return b/c
*/
AVRational av_div_q(AVRational b, AVRational c) av_const;
/**
* Add two rationals.
* @param b First rational
* @param c Second rational
* @return b+c
*/
AVRational av_add_q(AVRational b, AVRational c) av_const;
/**
* Subtract one rational from another.
* @param b First rational
* @param c Second rational
* @return b-c
*/
AVRational av_sub_q(AVRational b, AVRational c) av_const;
/**
* Invert a rational.
* @param q value
* @return 1 / q
*/
static av_always_inline AVRational av_inv_q(AVRational q)
{
AVRational r = { q.den, q.num };
return r;
}
/**
* Convert a double precision floating point number to a rational.
*
* In case of infinity, the returned value is expressed as `{1, 0}` or
* `{-1, 0}` depending on the sign.
*
* @param d `double` to convert
* @param max Maximum allowed numerator and denominator
* @return `d` in AVRational form
* @see av_q2d()
*/
AVRational av_d2q(double d, int max) av_const;
/**
* Find which of the two rationals is closer to another rational.
*
* @param q Rational to be compared against
* @param q1,q2 Rationals to be tested
* @return One of the following values:
* - 1 if `q1` is nearer to `q` than `q2`
* - -1 if `q2` is nearer to `q` than `q1`
* - 0 if they have the same distance
*/
int av_nearer_q(AVRational q, AVRational q1, AVRational q2);
/**
* Find the value in a list of rationals nearest a given reference rational.
*
* @param q Reference rational
* @param q_list Array of rationals terminated by `{0, 0}`
* @return Index of the nearest value found in the array
*/
int av_find_nearest_q_idx(AVRational q, const AVRational* q_list);
/**
* Convert an AVRational to a IEEE 32-bit `float` expressed in fixed-point
* format.
*
* @param q Rational to be converted
* @return Equivalent floating-point value, expressed as an unsigned 32-bit
* integer.
* @note The returned value is platform-indepedant.
*/
uint32_t av_q2intfloat(AVRational q);
/**
* @}
*/
#endif /* AVUTIL_RATIONAL_H */

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/*
* RC4 encryption/decryption/pseudo-random number generator
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_RC4_H
#define AVUTIL_RC4_H
#include <stdint.h>
/**
* @defgroup lavu_rc4 RC4
* @ingroup lavu_crypto
* @{
*/
typedef struct AVRC4 {
uint8_t state[256];
int x, y;
} AVRC4;
/**
* Allocate an AVRC4 context.
*/
AVRC4 *av_rc4_alloc(void);
/**
* @brief Initializes an AVRC4 context.
*
* @param key_bits must be a multiple of 8
* @param decrypt 0 for encryption, 1 for decryption, currently has no effect
* @return zero on success, negative value otherwise
*/
int av_rc4_init(struct AVRC4 *d, const uint8_t *key, int key_bits, int decrypt);
/**
* @brief Encrypts / decrypts using the RC4 algorithm.
*
* @param count number of bytes
* @param dst destination array, can be equal to src
* @param src source array, can be equal to dst, may be NULL
* @param iv not (yet) used for RC4, should be NULL
* @param decrypt 0 for encryption, 1 for decryption, not (yet) used
*/
void av_rc4_crypt(struct AVRC4 *d, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt);
/**
* @}
*/
#endif /* AVUTIL_RC4_H */

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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_REPLAYGAIN_H
#define AVUTIL_REPLAYGAIN_H
#include <stdint.h>
/**
* ReplayGain information (see
* http://wiki.hydrogenaudio.org/index.php?title=ReplayGain_1.0_specification).
* The size of this struct is a part of the public ABI.
*/
typedef struct AVReplayGain {
/**
* Track replay gain in microbels (divide by 100000 to get the value in dB).
* Should be set to INT32_MIN when unknown.
*/
int32_t track_gain;
/**
* Peak track amplitude, with 100000 representing full scale (but values
* may overflow). 0 when unknown.
*/
uint32_t track_peak;
/**
* Same as track_gain, but for the whole album.
*/
int32_t album_gain;
/**
* Same as track_peak, but for the whole album,
*/
uint32_t album_peak;
} AVReplayGain;
#endif /* AVUTIL_REPLAYGAIN_H */

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/*
* Copyright (C) 2007 Michael Niedermayer <michaelni@gmx.at>
* Copyright (C) 2013 James Almer <jamrial@gmail.com>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* @ingroup lavu_ripemd
* Public header for RIPEMD hash function implementation.
*/
#ifndef AVUTIL_RIPEMD_H
#define AVUTIL_RIPEMD_H
#include <stdint.h>
#include "attributes.h"
#include "version.h"
/**
* @defgroup lavu_ripemd RIPEMD
* @ingroup lavu_hash
* RIPEMD hash function implementation.
*
* @{
*/
extern const int av_ripemd_size;
struct AVRIPEMD;
/**
* Allocate an AVRIPEMD context.
*/
struct AVRIPEMD *av_ripemd_alloc(void);
/**
* Initialize RIPEMD hashing.
*
* @param context pointer to the function context (of size av_ripemd_size)
* @param bits number of bits in digest (128, 160, 256 or 320 bits)
* @return zero if initialization succeeded, -1 otherwise
*/
int av_ripemd_init(struct AVRIPEMD* context, int bits);
/**
* Update hash value.
*
* @param context hash function context
* @param data input data to update hash with
* @param len input data length
*/
void av_ripemd_update(struct AVRIPEMD* context, const uint8_t* data, unsigned int len);
/**
* Finish hashing and output digest value.
*
* @param context hash function context
* @param digest buffer where output digest value is stored
*/
void av_ripemd_final(struct AVRIPEMD* context, uint8_t *digest);
/**
* @}
*/
#endif /* AVUTIL_RIPEMD_H */

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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_SAMPLEFMT_H
#define AVUTIL_SAMPLEFMT_H
#include <stdint.h>
#include "avutil.h"
#include "attributes.h"
/**
* @addtogroup lavu_audio
* @{
*
* @defgroup lavu_sampfmts Audio sample formats
*
* Audio sample format enumeration and related convenience functions.
* @{
*/
/**
* Audio sample formats
*
* - The data described by the sample format is always in native-endian order.
* Sample values can be expressed by native C types, hence the lack of a signed
* 24-bit sample format even though it is a common raw audio data format.
*
* - The floating-point formats are based on full volume being in the range
* [-1.0, 1.0]. Any values outside this range are beyond full volume level.
*
* - The data layout as used in av_samples_fill_arrays() and elsewhere in FFmpeg
* (such as AVFrame in libavcodec) is as follows:
*
* @par
* For planar sample formats, each audio channel is in a separate data plane,
* and linesize is the buffer size, in bytes, for a single plane. All data
* planes must be the same size. For packed sample formats, only the first data
* plane is used, and samples for each channel are interleaved. In this case,
* linesize is the buffer size, in bytes, for the 1 plane.
*
*/
enum AVSampleFormat {
AV_SAMPLE_FMT_NONE = -1,
AV_SAMPLE_FMT_U8, ///< unsigned 8 bits
AV_SAMPLE_FMT_S16, ///< signed 16 bits
AV_SAMPLE_FMT_S32, ///< signed 32 bits
AV_SAMPLE_FMT_FLT, ///< float
AV_SAMPLE_FMT_DBL, ///< double
AV_SAMPLE_FMT_U8P, ///< unsigned 8 bits, planar
AV_SAMPLE_FMT_S16P, ///< signed 16 bits, planar
AV_SAMPLE_FMT_S32P, ///< signed 32 bits, planar
AV_SAMPLE_FMT_FLTP, ///< float, planar
AV_SAMPLE_FMT_DBLP, ///< double, planar
AV_SAMPLE_FMT_S64, ///< signed 64 bits
AV_SAMPLE_FMT_S64P, ///< signed 64 bits, planar
AV_SAMPLE_FMT_NB ///< Number of sample formats. DO NOT USE if linking dynamically
};
/**
* Return the name of sample_fmt, or NULL if sample_fmt is not
* recognized.
*/
const char *av_get_sample_fmt_name(enum AVSampleFormat sample_fmt);
/**
* Return a sample format corresponding to name, or AV_SAMPLE_FMT_NONE
* on error.
*/
enum AVSampleFormat av_get_sample_fmt(const char *name);
/**
* Return the planar<->packed alternative form of the given sample format, or
* AV_SAMPLE_FMT_NONE on error. If the passed sample_fmt is already in the
* requested planar/packed format, the format returned is the same as the
* input.
*/
enum AVSampleFormat av_get_alt_sample_fmt(enum AVSampleFormat sample_fmt, int planar);
/**
* Get the packed alternative form of the given sample format.
*
* If the passed sample_fmt is already in packed format, the format returned is
* the same as the input.
*
* @return the packed alternative form of the given sample format or
AV_SAMPLE_FMT_NONE on error.
*/
enum AVSampleFormat av_get_packed_sample_fmt(enum AVSampleFormat sample_fmt);
/**
* Get the planar alternative form of the given sample format.
*
* If the passed sample_fmt is already in planar format, the format returned is
* the same as the input.
*
* @return the planar alternative form of the given sample format or
AV_SAMPLE_FMT_NONE on error.
*/
enum AVSampleFormat av_get_planar_sample_fmt(enum AVSampleFormat sample_fmt);
/**
* Generate a string corresponding to the sample format with
* sample_fmt, or a header if sample_fmt is negative.
*
* @param buf the buffer where to write the string
* @param buf_size the size of buf
* @param sample_fmt the number of the sample format to print the
* corresponding info string, or a negative value to print the
* corresponding header.
* @return the pointer to the filled buffer or NULL if sample_fmt is
* unknown or in case of other errors
*/
char *av_get_sample_fmt_string(char *buf, int buf_size, enum AVSampleFormat sample_fmt);
/**
* Return number of bytes per sample.
*
* @param sample_fmt the sample format
* @return number of bytes per sample or zero if unknown for the given
* sample format
*/
int av_get_bytes_per_sample(enum AVSampleFormat sample_fmt);
/**
* Check if the sample format is planar.
*
* @param sample_fmt the sample format to inspect
* @return 1 if the sample format is planar, 0 if it is interleaved
*/
int av_sample_fmt_is_planar(enum AVSampleFormat sample_fmt);
/**
* Get the required buffer size for the given audio parameters.
*
* @param[out] linesize calculated linesize, may be NULL
* @param nb_channels the number of channels
* @param nb_samples the number of samples in a single channel
* @param sample_fmt the sample format
* @param align buffer size alignment (0 = default, 1 = no alignment)
* @return required buffer size, or negative error code on failure
*/
int av_samples_get_buffer_size(int *linesize, int nb_channels, int nb_samples,
enum AVSampleFormat sample_fmt, int align);
/**
* @}
*
* @defgroup lavu_sampmanip Samples manipulation
*
* Functions that manipulate audio samples
* @{
*/
/**
* Fill plane data pointers and linesize for samples with sample
* format sample_fmt.
*
* The audio_data array is filled with the pointers to the samples data planes:
* for planar, set the start point of each channel's data within the buffer,
* for packed, set the start point of the entire buffer only.
*
* The value pointed to by linesize is set to the aligned size of each
* channel's data buffer for planar layout, or to the aligned size of the
* buffer for all channels for packed layout.
*
* The buffer in buf must be big enough to contain all the samples
* (use av_samples_get_buffer_size() to compute its minimum size),
* otherwise the audio_data pointers will point to invalid data.
*
* @see enum AVSampleFormat
* The documentation for AVSampleFormat describes the data layout.
*
* @param[out] audio_data array to be filled with the pointer for each channel
* @param[out] linesize calculated linesize, may be NULL
* @param buf the pointer to a buffer containing the samples
* @param nb_channels the number of channels
* @param nb_samples the number of samples in a single channel
* @param sample_fmt the sample format
* @param align buffer size alignment (0 = default, 1 = no alignment)
* @return >=0 on success or a negative error code on failure
* @todo return minimum size in bytes required for the buffer in case
* of success at the next bump
*/
int av_samples_fill_arrays(uint8_t **audio_data, int *linesize,
const uint8_t *buf,
int nb_channels, int nb_samples,
enum AVSampleFormat sample_fmt, int align);
/**
* Allocate a samples buffer for nb_samples samples, and fill data pointers and
* linesize accordingly.
* The allocated samples buffer can be freed by using av_freep(&audio_data[0])
* Allocated data will be initialized to silence.
*
* @see enum AVSampleFormat
* The documentation for AVSampleFormat describes the data layout.
*
* @param[out] audio_data array to be filled with the pointer for each channel
* @param[out] linesize aligned size for audio buffer(s), may be NULL
* @param nb_channels number of audio channels
* @param nb_samples number of samples per channel
* @param align buffer size alignment (0 = default, 1 = no alignment)
* @return >=0 on success or a negative error code on failure
* @todo return the size of the allocated buffer in case of success at the next bump
* @see av_samples_fill_arrays()
* @see av_samples_alloc_array_and_samples()
*/
int av_samples_alloc(uint8_t **audio_data, int *linesize, int nb_channels,
int nb_samples, enum AVSampleFormat sample_fmt, int align);
/**
* Allocate a data pointers array, samples buffer for nb_samples
* samples, and fill data pointers and linesize accordingly.
*
* This is the same as av_samples_alloc(), but also allocates the data
* pointers array.
*
* @see av_samples_alloc()
*/
int av_samples_alloc_array_and_samples(uint8_t ***audio_data, int *linesize, int nb_channels,
int nb_samples, enum AVSampleFormat sample_fmt, int align);
/**
* Copy samples from src to dst.
*
* @param dst destination array of pointers to data planes
* @param src source array of pointers to data planes
* @param dst_offset offset in samples at which the data will be written to dst
* @param src_offset offset in samples at which the data will be read from src
* @param nb_samples number of samples to be copied
* @param nb_channels number of audio channels
* @param sample_fmt audio sample format
*/
int av_samples_copy(uint8_t **dst, uint8_t * const *src, int dst_offset,
int src_offset, int nb_samples, int nb_channels,
enum AVSampleFormat sample_fmt);
/**
* Fill an audio buffer with silence.
*
* @param audio_data array of pointers to data planes
* @param offset offset in samples at which to start filling
* @param nb_samples number of samples to fill
* @param nb_channels number of audio channels
* @param sample_fmt audio sample format
*/
int av_samples_set_silence(uint8_t **audio_data, int offset, int nb_samples,
int nb_channels, enum AVSampleFormat sample_fmt);
/**
* @}
* @}
*/
#endif /* AVUTIL_SAMPLEFMT_H */

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/*
* Copyright (C) 2007 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* @ingroup lavu_sha
* Public header for SHA-1 & SHA-256 hash function implementations.
*/
#ifndef AVUTIL_SHA_H
#define AVUTIL_SHA_H
#include <stddef.h>
#include <stdint.h>
#include "attributes.h"
#include "version.h"
/**
* @defgroup lavu_sha SHA
* @ingroup lavu_hash
* SHA-1 and SHA-256 (Secure Hash Algorithm) hash function implementations.
*
* This module supports the following SHA hash functions:
*
* - SHA-1: 160 bits
* - SHA-224: 224 bits, as a variant of SHA-2
* - SHA-256: 256 bits, as a variant of SHA-2
*
* @see For SHA-384, SHA-512, and variants thereof, see @ref lavu_sha512.
*
* @{
*/
extern const int av_sha_size;
struct AVSHA;
/**
* Allocate an AVSHA context.
*/
struct AVSHA *av_sha_alloc(void);
/**
* Initialize SHA-1 or SHA-2 hashing.
*
* @param context pointer to the function context (of size av_sha_size)
* @param bits number of bits in digest (SHA-1 - 160 bits, SHA-2 224 or 256 bits)
* @return zero if initialization succeeded, -1 otherwise
*/
int av_sha_init(struct AVSHA* context, int bits);
/**
* Update hash value.
*
* @param ctx hash function context
* @param data input data to update hash with
* @param len input data length
*/
#if FF_API_CRYPTO_SIZE_T
void av_sha_update(struct AVSHA *ctx, const uint8_t *data, unsigned int len);
#else
void av_sha_update(struct AVSHA *ctx, const uint8_t *data, size_t len);
#endif
/**
* Finish hashing and output digest value.
*
* @param context hash function context
* @param digest buffer where output digest value is stored
*/
void av_sha_final(struct AVSHA* context, uint8_t *digest);
/**
* @}
*/
#endif /* AVUTIL_SHA_H */

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/*
* Copyright (C) 2007 Michael Niedermayer <michaelni@gmx.at>
* Copyright (C) 2013 James Almer <jamrial@gmail.com>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* @ingroup lavu_sha512
* Public header for SHA-512 implementation.
*/
#ifndef AVUTIL_SHA512_H
#define AVUTIL_SHA512_H
#include <stddef.h>
#include <stdint.h>
#include "attributes.h"
#include "version.h"
/**
* @defgroup lavu_sha512 SHA-512
* @ingroup lavu_hash
* SHA-512 (Secure Hash Algorithm) hash function implementations.
*
* This module supports the following SHA-2 hash functions:
*
* - SHA-512/224: 224 bits
* - SHA-512/256: 256 bits
* - SHA-384: 384 bits
* - SHA-512: 512 bits
*
* @see For SHA-1, SHA-256, and variants thereof, see @ref lavu_sha.
*
* @{
*/
extern const int av_sha512_size;
struct AVSHA512;
/**
* Allocate an AVSHA512 context.
*/
struct AVSHA512 *av_sha512_alloc(void);
/**
* Initialize SHA-2 512 hashing.
*
* @param context pointer to the function context (of size av_sha512_size)
* @param bits number of bits in digest (224, 256, 384 or 512 bits)
* @return zero if initialization succeeded, -1 otherwise
*/
int av_sha512_init(struct AVSHA512* context, int bits);
/**
* Update hash value.
*
* @param context hash function context
* @param data input data to update hash with
* @param len input data length
*/
#if FF_API_CRYPTO_SIZE_T
void av_sha512_update(struct AVSHA512* context, const uint8_t* data, unsigned int len);
#else
void av_sha512_update(struct AVSHA512* context, const uint8_t* data, size_t len);
#endif
/**
* Finish hashing and output digest value.
*
* @param context hash function context
* @param digest buffer where output digest value is stored
*/
void av_sha512_final(struct AVSHA512* context, uint8_t *digest);
/**
* @}
*/
#endif /* AVUTIL_SHA512_H */

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