libavcodec/vaapi.h

   1 /*
   2  * Video Acceleration API (shared data between Libav and the video player)
   3  * HW decode acceleration for MPEG-2, MPEG-4, H.264 and VC-1
   4  *
   5  * Copyright (C) 2008-2009 Splitted-Desktop Systems
   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_VAAPI_H
  25 #define AVCODEC_VAAPI_H
  26
  27 /**
  28  * @file
  29  * @ingroup lavc_codec_hwaccel_vaapi
  30  * Public libavcodec VA API header.
  31  */
  32
  33 #include <stdint.h>
  34
  35 /**
  36  * @defgroup lavc_codec_hwaccel_vaapi VA API Decoding
  37  * @ingroup lavc_codec_hwaccel
  38  * @{
  39  */
  40
  41 /**
  42  * This structure is used to share data between the Libav library and
  43  * the client video application.
  44  * This shall be zero-allocated and available as
  45  * AVCodecContext.hwaccel_context. All user members can be set once
  46  * during initialization or through each AVCodecContext.get_buffer()
  47  * function call. In any case, they must be valid prior to calling
  48  * decoding functions.
  49  */
  50 struct vaapi_context {
  51     /**
  52      * Window system dependent data
  53      *
  54      * - encoding: unused
  55      * - decoding: Set by user
  56      */
  57     void *display;
  58
  59     /**
  60      * Configuration ID
  61      *
  62      * - encoding: unused
  63      * - decoding: Set by user
  64      */
  65     uint32_t config_id;
  66
  67     /**
  68      * Context ID (video decode pipeline)
  69      *
  70      * - encoding: unused
  71      * - decoding: Set by user
  72      */
  73     uint32_t context_id;
  74
  75     /**
  76      * VAPictureParameterBuffer ID
  77      *
  78      * - encoding: unused
  79      * - decoding: Set by libavcodec
  80      */
  81     uint32_t pic_param_buf_id;
  82
  83     /**
  84      * VAIQMatrixBuffer ID
  85      *
  86      * - encoding: unused
  87      * - decoding: Set by libavcodec
  88      */
  89     uint32_t iq_matrix_buf_id;
  90
  91     /**
  92      * VABitPlaneBuffer ID (for VC-1 decoding)
  93      *
  94      * - encoding: unused
  95      * - decoding: Set by libavcodec
  96      */
  97     uint32_t bitplane_buf_id;
  98
  99     /**
 100      * Slice parameter/data buffer IDs
 101      *
 102      * - encoding: unused
 103      * - decoding: Set by libavcodec
 104      */
 105     uint32_t *slice_buf_ids;
 106
 107     /**
 108      * Number of effective slice buffer IDs to send to the HW
 109      *
 110      * - encoding: unused
 111      * - decoding: Set by libavcodec
 112      */
 113     unsigned int n_slice_buf_ids;
 114
 115     /**
 116      * Size of pre-allocated slice_buf_ids
 117      *
 118      * - encoding: unused
 119      * - decoding: Set by libavcodec
 120      */
 121     unsigned int slice_buf_ids_alloc;
 122
 123     /**
 124      * Pointer to VASliceParameterBuffers
 125      *
 126      * - encoding: unused
 127      * - decoding: Set by libavcodec
 128      */
 129     void *slice_params;
 130
 131     /**
 132      * Size of a VASliceParameterBuffer element
 133      *
 134      * - encoding: unused
 135      * - decoding: Set by libavcodec
 136      */
 137     unsigned int slice_param_size;
 138
 139     /**
 140      * Size of pre-allocated slice_params
 141      *
 142      * - encoding: unused
 143      * - decoding: Set by libavcodec
 144      */
 145     unsigned int slice_params_alloc;
 146
 147     /**
 148      * Number of slices currently filled in
 149      *
 150      * - encoding: unused
 151      * - decoding: Set by libavcodec
 152      */
 153     unsigned int slice_count;
 154
 155     /**
 156      * Pointer to slice data buffer base
 157      * - encoding: unused
 158      * - decoding: Set by libavcodec
 159      */
 160     const uint8_t *slice_data;
 161
 162     /**
 163      * Current size of slice data
 164      *
 165      * - encoding: unused
 166      * - decoding: Set by libavcodec
 167      */
 168     uint32_t slice_data_size;
 169 };
 170
 171 /* @} */
 172
 173 #endif /* AVCODEC_VAAPI_H */