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2134
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1 /*
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2 * The Video Decode and Presentation API for UNIX (VDPAU) is used for
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3 * hardware-accelerated decoding of MPEG-1/2, H.264 and VC-1.
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4 *
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5 * Copyright (C) 2008 NVIDIA
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6 *
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7 * This file is part of FFmpeg.
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8 *
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9 * FFmpeg is free software; you can redistribute it and/or
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10 * modify it under the terms of the GNU Lesser General Public
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11 * License as published by the Free Software Foundation; either
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12 * version 2.1 of the License, or (at your option) any later version.
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13 *
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14 * FFmpeg is distributed in the hope that it will be useful,
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15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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17 * Lesser General Public License for more details.
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18 *
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19 * You should have received a copy of the GNU Lesser General Public
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20 * License along with FFmpeg; if not, write to the Free Software
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21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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22 */
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23
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24 #ifndef AVCODEC_VDPAU_H
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25 #define AVCODEC_VDPAU_H
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26
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27 /**
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28 * @file
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29 * @ingroup lavc_codec_hwaccel_vdpau
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30 * Public libavcodec VDPAU header.
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31 */
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32
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33
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34 /**
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35 * @defgroup lavc_codec_hwaccel_vdpau VDPAU Decoder and Renderer
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36 * @ingroup lavc_codec_hwaccel
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37 *
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38 * VDPAU hardware acceleration has two modules
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39 * - VDPAU decoding
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40 * - VDPAU presentation
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41 *
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42 * The VDPAU decoding module parses all headers using FFmpeg
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43 * parsing mechanisms and uses VDPAU for the actual decoding.
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44 *
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45 * As per the current implementation, the actual decoding
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46 * and rendering (API calls) are done as part of the VDPAU
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47 * presentation (vo_vdpau.c) module.
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48 *
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49 * @{
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50 */
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51
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52 #include <vdpau/vdpau.h>
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53 #include <vdpau/vdpau_x11.h>
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54 #include "libavutil/avconfig.h"
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55
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56 union FFVdpPictureInfo {
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57 VdpPictureInfoH264 h264;
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58 VdpPictureInfoMPEG1Or2 mpeg;
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59 VdpPictureInfoVC1 vc1;
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60 VdpPictureInfoMPEG4Part2 mpeg4;
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61 };
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62
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63 /**
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64 * This structure is used to share data between the libavcodec library and
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65 * the client video application.
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66 * The user shall zero-allocate the structure and make it available as
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67 * AVCodecContext.hwaccel_context. Members can be set by the user once
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68 * during initialization or through each AVCodecContext.get_buffer()
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69 * function call. In any case, they must be valid prior to calling
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70 * decoding functions.
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71 */
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72 typedef struct AVVDPAUContext {
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73 /**
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74 * VDPAU decoder handle
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75 *
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76 * Set by user.
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77 */
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78 VdpDecoder decoder;
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79
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80 /**
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81 * VDPAU decoder render callback
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82 *
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83 * Set by the user.
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84 */
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85 VdpDecoderRender *render;
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86
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87 /**
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88 * VDPAU picture information
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89 *
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90 * Set by libavcodec.
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91 */
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92 union FFVdpPictureInfo info;
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93
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94 /**
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95 * Allocated size of the bitstream_buffers table.
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96 *
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97 * Set by libavcodec.
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98 */
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99 int bitstream_buffers_allocated;
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100
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101 /**
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102 * Useful bitstream buffers in the bitstream buffers table.
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103 *
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104 * Set by libavcodec.
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105 */
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106 int bitstream_buffers_used;
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107
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108 /**
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109 * Table of bitstream buffers.
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110 * The user is responsible for freeing this buffer using av_freep().
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111 *
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112 * Set by libavcodec.
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113 */
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114 VdpBitstreamBuffer *bitstream_buffers;
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115 } AVVDPAUContext;
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116
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117
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118 /** @brief The videoSurface is used for rendering. */
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119 #define FF_VDPAU_STATE_USED_FOR_RENDER 1
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120
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121 /**
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122 * @brief The videoSurface is needed for reference/prediction.
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123 * The codec manipulates this.
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124 */
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125 #define FF_VDPAU_STATE_USED_FOR_REFERENCE 2
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126
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127 /**
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128 * @brief This structure is used as a callback between the FFmpeg
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129 * decoder (vd_) and presentation (vo_) module.
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130 * This is used for defining a video frame containing surface,
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131 * picture parameter, bitstream information etc which are passed
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132 * between the FFmpeg decoder and its clients.
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133 */
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134 struct vdpau_render_state {
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135 VdpVideoSurface surface; ///< Used as rendered surface, never changed.
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136
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137 int state; ///< Holds FF_VDPAU_STATE_* values.
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138
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139 #if AV_HAVE_INCOMPATIBLE_FORK_ABI
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140 /** picture parameter information for all supported codecs */
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141 union FFVdpPictureInfo info;
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142 #endif
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143
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144 /** Describe size/location of the compressed video data.
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145 Set to 0 when freeing bitstream_buffers. */
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146 int bitstream_buffers_allocated;
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147 int bitstream_buffers_used;
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148 /** The user is responsible for freeing this buffer using av_freep(). */
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149 VdpBitstreamBuffer *bitstream_buffers;
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150
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151 #if !AV_HAVE_INCOMPATIBLE_FORK_ABI
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152 /** picture parameter information for all supported codecs */
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153 union FFVdpPictureInfo info;
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154 #endif
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155 };
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156
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157 /* @}*/
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158
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159 #endif /* AVCODEC_VDPAU_H */
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