FFmpeg/libavcodec/vdpau.h

/*
 * 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 Libav.
 *
 * Libav 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.
 *
 * Libav 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 Libav; 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 Libav
 * 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 <vdpau/vdpau_x11.h>

/** @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 Libav
 * 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 Libav 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 VdpPictureInfo {
        VdpPictureInfoH264        h264;
        VdpPictureInfoMPEG1Or2    mpeg;
        VdpPictureInfoVC1          vc1;
        VdpPictureInfoMPEG4Part2 mpeg4;
    } 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 /* AVCODEC_VDPAU_H */