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152 lines
4.1 KiB
C
152 lines
4.1 KiB
C
/*
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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 Libav.
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*
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* Libav 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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* Libav 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 Libav; 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 Libav
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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 <vdpau/vdpau_x11.h>
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union VdpPictureInfo {
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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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/**
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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 zero-allocate the structure 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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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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/**
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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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union VdpPictureInfo 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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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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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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VdpBitstreamBuffer *bitstream_buffers;
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} AVVDPAUContext;
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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 Libav
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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 Libav 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 VdpPictureInfo 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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/* @}*/
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#endif /* AVCODEC_VDPAU_H */
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