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