1 /*

     2  * The Video Decode and Presentation API for UNIX (VDPAU) is used for

     3  * hardware-accelerated decoding of MPEG-1/2, H.264 and VC-1.

     4  *

     5  * Copyright (C) 2008 NVIDIA

     6  *

     7  * This file is part of Libav.

     8  *

     9  * Libav is free software; you can redistribute it and/or

    10  * modify it under the terms of the GNU Lesser General Public

    11  * License as published by the Free Software Foundation; either

    12  * version 2.1 of the License, or (at your option) any later version.

    13  *

    14  * Libav is distributed in the hope that it will be useful,

    15  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    17  * Lesser General Public License for more details.

    18  *

    19  * You should have received a copy of the GNU Lesser General Public

    20  * License along with Libav; if not, write to the Free Software

    21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

    22  */

    23 

    24 #ifndef AVCODEC_VDPAU_H

    25 #define AVCODEC_VDPAU_H

    26 

    27 /**

    28  * @file

    29  * @ingroup lavc_codec_hwaccel_vdpau

    30  * Public libavcodec VDPAU header.

    31  */

    32 

    33 

    34 /**

    35  * @defgroup lavc_codec_hwaccel_vdpau VDPAU Decoder and Renderer

    36  * @ingroup lavc_codec_hwaccel

    37  *

    38  * VDPAU hardware acceleration has two modules

    39  * - VDPAU decoding

    40  * - VDPAU presentation

    41  *

    42  * The VDPAU decoding module parses all headers using Libav

    43  * parsing mechanisms and uses VDPAU for the actual decoding.

    44  *

    45  * As per the current implementation, the actual decoding

    46  * and rendering (API calls) are done as part of the VDPAU

    47  * presentation (vo_vdpau.c) module.

    48  *

    49  * @{

    50  */

    51 

    52 #include <vdpau/vdpau.h>

    53 #include <vdpau/vdpau_x11.h>

    54 

    55 /** @brief The videoSurface is used for rendering. */

    56 #define FF_VDPAU_STATE_USED_FOR_RENDER 1

    57 

    58 /**

    59  * @brief The videoSurface is needed for reference/prediction.

    60  * The codec manipulates this.

    61  */

    62 #define FF_VDPAU_STATE_USED_FOR_REFERENCE 2

    63 

    64 /**

    65  * @brief This structure is used as a callback between the Libav

    66  * decoder (vd_) and presentation (vo_) module.

    67  * This is used for defining a video frame containing surface,

    68  * picture parameter, bitstream information etc which are passed

    69  * between the Libav decoder and its clients.

    70  */

    71 struct vdpau_render_state {

    72     VdpVideoSurface surface; ///< Used as rendered surface, never changed.

    73 

    74     int state; ///< Holds FF_VDPAU_STATE_* values.

    75 

    76     /** picture parameter information for all supported codecs */

    77     union VdpPictureInfo {

    78         VdpPictureInfoH264        h264;

    79         VdpPictureInfoMPEG1Or2    mpeg;

    80         VdpPictureInfoVC1          vc1;

    81         VdpPictureInfoMPEG4Part2 mpeg4;

    82     } info;

    83 

    84     /** Describe size/location of the compressed video data.

    85         Set to 0 when freeing bitstream_buffers. */

    86     int bitstream_buffers_allocated;

    87     int bitstream_buffers_used;

    88     /** The user is responsible for freeing this buffer using av_freep(). */

    89     VdpBitstreamBuffer *bitstream_buffers;

    90 };

    91 

    92 /* @}*/

    93 

    94 #endif /* AVCODEC_VDPAU_H */