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2134
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1 /*
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2 * copyright (c) 2001 Fabrice Bellard
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3 *
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4 * This file is part of FFmpeg.
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5 *
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6 * FFmpeg is free software; you can redistribute it and/or
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7 * modify it under the terms of the GNU Lesser General Public
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8 * License as published by the Free Software Foundation; either
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9 * version 2.1 of the License, or (at your option) any later version.
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10 *
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11 * FFmpeg is distributed in the hope that it will be useful,
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 * Lesser General Public License for more details.
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15 *
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16 * You should have received a copy of the GNU Lesser General Public
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17 * License along with FFmpeg; if not, write to the Free Software
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18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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19 */
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20
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21 #ifndef AVCODEC_AVCODEC_H
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22 #define AVCODEC_AVCODEC_H
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23
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24 /**
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25 * @file
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26 * @ingroup libavc
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27 * Libavcodec external API header
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28 */
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29
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30 #include <errno.h>
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31 #include "../libavutil/samplefmt.h"
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32 #include "../libavutil/avutil.h"
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33 #include "../libavutil/buffer.h"
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34 #include "../libavutil/cpu.h"
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35 #include "../libavutil/channel_layout.h"
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36 #include "../libavutil/dict.h"
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37 #include "../libavutil/frame.h"
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38 #include "../libavutil/log.h"
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39 #include "../libavutil/pixfmt.h"
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40 #include "../libavutil/rational.h"
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41
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42 #include "../libavcodec/version.h"
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43 /**
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44 * @defgroup libavc Encoding/Decoding Library
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45 * @{
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46 *
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47 * @defgroup lavc_decoding Decoding
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48 * @{
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49 * @}
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50 *
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51 * @defgroup lavc_encoding Encoding
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52 * @{
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53 * @}
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54 *
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55 * @defgroup lavc_codec Codecs
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56 * @{
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57 * @defgroup lavc_codec_native Native Codecs
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58 * @{
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59 * @}
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60 * @defgroup lavc_codec_wrappers External library wrappers
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61 * @{
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62 * @}
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63 * @defgroup lavc_codec_hwaccel Hardware Accelerators bridge
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64 * @{
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65 * @}
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66 * @}
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67 * @defgroup lavc_internal Internal
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68 * @{
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69 * @}
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70 * @}
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71 *
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72 */
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73
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74 /**
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75 * @defgroup lavc_core Core functions/structures.
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76 * @ingroup libavc
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77 *
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78 * Basic definitions, functions for querying libavcodec capabilities,
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79 * allocating core structures, etc.
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80 * @{
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81 */
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82
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83
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84 /**
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85 * Identify the syntax and semantics of the bitstream.
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86 * The principle is roughly:
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87 * Two decoders with the same ID can decode the same streams.
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88 * Two encoders with the same ID can encode compatible streams.
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89 * There may be slight deviations from the principle due to implementation
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90 * details.
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91 *
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92 * If you add a codec ID to this list, add it so that
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93 * 1. no value of a existing codec ID changes (that would break ABI),
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94 * 2. Give it a value which when taken as ASCII is recognized uniquely by a human as this specific codec.
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95 * This ensures that 2 forks can independently add AVCodecIDs without producing conflicts.
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96 *
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97 * After adding new codec IDs, do not forget to add an entry to the codec
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98 * descriptor list and bump libavcodec minor version.
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99 */
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100 enum AVCodecID {
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101 AV_CODEC_ID_NONE,
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102
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103 /* video codecs */
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104 AV_CODEC_ID_MPEG1VIDEO,
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105 AV_CODEC_ID_MPEG2VIDEO, ///< preferred ID for MPEG-1/2 video decoding
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106 AV_CODEC_ID_MPEG2VIDEO_XVMC,
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107 AV_CODEC_ID_H261,
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108 AV_CODEC_ID_H263,
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109 AV_CODEC_ID_RV10,
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110 AV_CODEC_ID_RV20,
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111 AV_CODEC_ID_MJPEG,
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112 AV_CODEC_ID_MJPEGB,
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113 AV_CODEC_ID_LJPEG,
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114 AV_CODEC_ID_SP5X,
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115 AV_CODEC_ID_JPEGLS,
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116 AV_CODEC_ID_MPEG4,
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117 AV_CODEC_ID_RAWVIDEO,
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118 AV_CODEC_ID_MSMPEG4V1,
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119 AV_CODEC_ID_MSMPEG4V2,
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120 AV_CODEC_ID_MSMPEG4V3,
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121 AV_CODEC_ID_WMV1,
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122 AV_CODEC_ID_WMV2,
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123 AV_CODEC_ID_H263P,
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124 AV_CODEC_ID_H263I,
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125 AV_CODEC_ID_FLV1,
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126 AV_CODEC_ID_SVQ1,
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127 AV_CODEC_ID_SVQ3,
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128 AV_CODEC_ID_DVVIDEO,
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129 AV_CODEC_ID_HUFFYUV,
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130 AV_CODEC_ID_CYUV,
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131 AV_CODEC_ID_H264,
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132 AV_CODEC_ID_INDEO3,
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133 AV_CODEC_ID_VP3,
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134 AV_CODEC_ID_THEORA,
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135 AV_CODEC_ID_ASV1,
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136 AV_CODEC_ID_ASV2,
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137 AV_CODEC_ID_FFV1,
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138 AV_CODEC_ID_4XM,
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139 AV_CODEC_ID_VCR1,
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140 AV_CODEC_ID_CLJR,
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141 AV_CODEC_ID_MDEC,
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142 AV_CODEC_ID_ROQ,
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143 AV_CODEC_ID_INTERPLAY_VIDEO,
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144 AV_CODEC_ID_XAN_WC3,
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145 AV_CODEC_ID_XAN_WC4,
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146 AV_CODEC_ID_RPZA,
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147 AV_CODEC_ID_CINEPAK,
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148 AV_CODEC_ID_WS_VQA,
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149 AV_CODEC_ID_MSRLE,
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150 AV_CODEC_ID_MSVIDEO1,
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151 AV_CODEC_ID_IDCIN,
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152 AV_CODEC_ID_8BPS,
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153 AV_CODEC_ID_SMC,
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154 AV_CODEC_ID_FLIC,
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155 AV_CODEC_ID_TRUEMOTION1,
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156 AV_CODEC_ID_VMDVIDEO,
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157 AV_CODEC_ID_MSZH,
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158 AV_CODEC_ID_ZLIB,
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159 AV_CODEC_ID_QTRLE,
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160 AV_CODEC_ID_TSCC,
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161 AV_CODEC_ID_ULTI,
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162 AV_CODEC_ID_QDRAW,
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163 AV_CODEC_ID_VIXL,
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164 AV_CODEC_ID_QPEG,
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165 AV_CODEC_ID_PNG,
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166 AV_CODEC_ID_PPM,
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167 AV_CODEC_ID_PBM,
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168 AV_CODEC_ID_PGM,
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169 AV_CODEC_ID_PGMYUV,
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170 AV_CODEC_ID_PAM,
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171 AV_CODEC_ID_FFVHUFF,
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172 AV_CODEC_ID_RV30,
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173 AV_CODEC_ID_RV40,
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174 AV_CODEC_ID_VC1,
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175 AV_CODEC_ID_WMV3,
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176 AV_CODEC_ID_LOCO,
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177 AV_CODEC_ID_WNV1,
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178 AV_CODEC_ID_AASC,
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179 AV_CODEC_ID_INDEO2,
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180 AV_CODEC_ID_FRAPS,
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181 AV_CODEC_ID_TRUEMOTION2,
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182 AV_CODEC_ID_BMP,
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183 AV_CODEC_ID_CSCD,
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184 AV_CODEC_ID_MMVIDEO,
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185 AV_CODEC_ID_ZMBV,
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186 AV_CODEC_ID_AVS,
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187 AV_CODEC_ID_SMACKVIDEO,
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188 AV_CODEC_ID_NUV,
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189 AV_CODEC_ID_KMVC,
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190 AV_CODEC_ID_FLASHSV,
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191 AV_CODEC_ID_CAVS,
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192 AV_CODEC_ID_JPEG2000,
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193 AV_CODEC_ID_VMNC,
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194 AV_CODEC_ID_VP5,
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195 AV_CODEC_ID_VP6,
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196 AV_CODEC_ID_VP6F,
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197 AV_CODEC_ID_TARGA,
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198 AV_CODEC_ID_DSICINVIDEO,
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199 AV_CODEC_ID_TIERTEXSEQVIDEO,
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200 AV_CODEC_ID_TIFF,
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201 AV_CODEC_ID_GIF,
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202 AV_CODEC_ID_DXA,
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203 AV_CODEC_ID_DNXHD,
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204 AV_CODEC_ID_THP,
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205 AV_CODEC_ID_SGI,
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206 AV_CODEC_ID_C93,
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207 AV_CODEC_ID_BETHSOFTVID,
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208 AV_CODEC_ID_PTX,
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209 AV_CODEC_ID_TXD,
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210 AV_CODEC_ID_VP6A,
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211 AV_CODEC_ID_AMV,
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212 AV_CODEC_ID_VB,
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213 AV_CODEC_ID_PCX,
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214 AV_CODEC_ID_SUNRAST,
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215 AV_CODEC_ID_INDEO4,
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216 AV_CODEC_ID_INDEO5,
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217 AV_CODEC_ID_MIMIC,
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218 AV_CODEC_ID_RL2,
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219 AV_CODEC_ID_ESCAPE124,
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220 AV_CODEC_ID_DIRAC,
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221 AV_CODEC_ID_BFI,
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222 AV_CODEC_ID_CMV,
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223 AV_CODEC_ID_MOTIONPIXELS,
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224 AV_CODEC_ID_TGV,
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225 AV_CODEC_ID_TGQ,
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226 AV_CODEC_ID_TQI,
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227 AV_CODEC_ID_AURA,
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228 AV_CODEC_ID_AURA2,
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229 AV_CODEC_ID_V210X,
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230 AV_CODEC_ID_TMV,
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231 AV_CODEC_ID_V210,
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232 AV_CODEC_ID_DPX,
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233 AV_CODEC_ID_MAD,
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234 AV_CODEC_ID_FRWU,
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235 AV_CODEC_ID_FLASHSV2,
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236 AV_CODEC_ID_CDGRAPHICS,
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237 AV_CODEC_ID_R210,
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238 AV_CODEC_ID_ANM,
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239 AV_CODEC_ID_BINKVIDEO,
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240 AV_CODEC_ID_IFF_ILBM,
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241 AV_CODEC_ID_IFF_BYTERUN1,
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242 AV_CODEC_ID_KGV1,
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243 AV_CODEC_ID_YOP,
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244 AV_CODEC_ID_VP8,
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245 AV_CODEC_ID_PICTOR,
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246 AV_CODEC_ID_ANSI,
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247 AV_CODEC_ID_A64_MULTI,
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248 AV_CODEC_ID_A64_MULTI5,
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249 AV_CODEC_ID_R10K,
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250 AV_CODEC_ID_MXPEG,
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251 AV_CODEC_ID_LAGARITH,
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252 AV_CODEC_ID_PRORES,
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253 AV_CODEC_ID_JV,
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254 AV_CODEC_ID_DFA,
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255 AV_CODEC_ID_WMV3IMAGE,
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256 AV_CODEC_ID_VC1IMAGE,
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257 AV_CODEC_ID_UTVIDEO,
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258 AV_CODEC_ID_BMV_VIDEO,
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259 AV_CODEC_ID_VBLE,
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260 AV_CODEC_ID_DXTORY,
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261 AV_CODEC_ID_V410,
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262 AV_CODEC_ID_XWD,
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263 AV_CODEC_ID_CDXL,
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264 AV_CODEC_ID_XBM,
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265 AV_CODEC_ID_ZEROCODEC,
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266 AV_CODEC_ID_MSS1,
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267 AV_CODEC_ID_MSA1,
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268 AV_CODEC_ID_TSCC2,
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269 AV_CODEC_ID_MTS2,
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270 AV_CODEC_ID_CLLC,
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271 AV_CODEC_ID_MSS2,
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272 AV_CODEC_ID_VP9,
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273 AV_CODEC_ID_AIC,
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274 AV_CODEC_ID_ESCAPE130_DEPRECATED,
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275
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276 AV_CODEC_ID_BRENDER_PIX= MKBETAG('B','P','I','X'),
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277 AV_CODEC_ID_Y41P = MKBETAG('Y','4','1','P'),
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278 AV_CODEC_ID_ESCAPE130 = MKBETAG('E','1','3','0'),
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279 AV_CODEC_ID_EXR = MKBETAG('0','E','X','R'),
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280 AV_CODEC_ID_AVRP = MKBETAG('A','V','R','P'),
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281
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282 AV_CODEC_ID_012V = MKBETAG('0','1','2','V'),
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283 AV_CODEC_ID_G2M = MKBETAG( 0 ,'G','2','M'),
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284 AV_CODEC_ID_AVUI = MKBETAG('A','V','U','I'),
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285 AV_CODEC_ID_AYUV = MKBETAG('A','Y','U','V'),
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286 AV_CODEC_ID_TARGA_Y216 = MKBETAG('T','2','1','6'),
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287 AV_CODEC_ID_V308 = MKBETAG('V','3','0','8'),
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288 AV_CODEC_ID_V408 = MKBETAG('V','4','0','8'),
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289 AV_CODEC_ID_YUV4 = MKBETAG('Y','U','V','4'),
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290 AV_CODEC_ID_SANM = MKBETAG('S','A','N','M'),
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291 AV_CODEC_ID_PAF_VIDEO = MKBETAG('P','A','F','V'),
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292 AV_CODEC_ID_AVRN = MKBETAG('A','V','R','n'),
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293 AV_CODEC_ID_CPIA = MKBETAG('C','P','I','A'),
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294 AV_CODEC_ID_XFACE = MKBETAG('X','F','A','C'),
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295 AV_CODEC_ID_SGIRLE = MKBETAG('S','G','I','R'),
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296 AV_CODEC_ID_MVC1 = MKBETAG('M','V','C','1'),
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297 AV_CODEC_ID_MVC2 = MKBETAG('M','V','C','2'),
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298 AV_CODEC_ID_SNOW = MKBETAG('S','N','O','W'),
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299 AV_CODEC_ID_WEBP = MKBETAG('W','E','B','P'),
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300 AV_CODEC_ID_SMVJPEG = MKBETAG('S','M','V','J'),
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301
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302 /* various PCM "codecs" */
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303 AV_CODEC_ID_FIRST_AUDIO = 0x10000, ///< A dummy id pointing at the start of audio codecs
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304 AV_CODEC_ID_PCM_S16LE = 0x10000,
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305 AV_CODEC_ID_PCM_S16BE,
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306 AV_CODEC_ID_PCM_U16LE,
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307 AV_CODEC_ID_PCM_U16BE,
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308 AV_CODEC_ID_PCM_S8,
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309 AV_CODEC_ID_PCM_U8,
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310 AV_CODEC_ID_PCM_MULAW,
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311 AV_CODEC_ID_PCM_ALAW,
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312 AV_CODEC_ID_PCM_S32LE,
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313 AV_CODEC_ID_PCM_S32BE,
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314 AV_CODEC_ID_PCM_U32LE,
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315 AV_CODEC_ID_PCM_U32BE,
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316 AV_CODEC_ID_PCM_S24LE,
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317 AV_CODEC_ID_PCM_S24BE,
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318 AV_CODEC_ID_PCM_U24LE,
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319 AV_CODEC_ID_PCM_U24BE,
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320 AV_CODEC_ID_PCM_S24DAUD,
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321 AV_CODEC_ID_PCM_ZORK,
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322 AV_CODEC_ID_PCM_S16LE_PLANAR,
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323 AV_CODEC_ID_PCM_DVD,
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324 AV_CODEC_ID_PCM_F32BE,
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325 AV_CODEC_ID_PCM_F32LE,
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326 AV_CODEC_ID_PCM_F64BE,
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327 AV_CODEC_ID_PCM_F64LE,
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328 AV_CODEC_ID_PCM_BLURAY,
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329 AV_CODEC_ID_PCM_LXF,
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330 AV_CODEC_ID_S302M,
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331 AV_CODEC_ID_PCM_S8_PLANAR,
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332 AV_CODEC_ID_PCM_S24LE_PLANAR = MKBETAG(24,'P','S','P'),
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333 AV_CODEC_ID_PCM_S32LE_PLANAR = MKBETAG(32,'P','S','P'),
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334 AV_CODEC_ID_PCM_S16BE_PLANAR = MKBETAG('P','S','P',16),
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335
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336 /* various ADPCM codecs */
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337 AV_CODEC_ID_ADPCM_IMA_QT = 0x11000,
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338 AV_CODEC_ID_ADPCM_IMA_WAV,
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339 AV_CODEC_ID_ADPCM_IMA_DK3,
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340 AV_CODEC_ID_ADPCM_IMA_DK4,
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341 AV_CODEC_ID_ADPCM_IMA_WS,
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342 AV_CODEC_ID_ADPCM_IMA_SMJPEG,
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343 AV_CODEC_ID_ADPCM_MS,
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344 AV_CODEC_ID_ADPCM_4XM,
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345 AV_CODEC_ID_ADPCM_XA,
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346 AV_CODEC_ID_ADPCM_ADX,
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347 AV_CODEC_ID_ADPCM_EA,
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348 AV_CODEC_ID_ADPCM_G726,
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349 AV_CODEC_ID_ADPCM_CT,
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350 AV_CODEC_ID_ADPCM_SWF,
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351 AV_CODEC_ID_ADPCM_YAMAHA,
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352 AV_CODEC_ID_ADPCM_SBPRO_4,
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353 AV_CODEC_ID_ADPCM_SBPRO_3,
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354 AV_CODEC_ID_ADPCM_SBPRO_2,
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355 AV_CODEC_ID_ADPCM_THP,
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356 AV_CODEC_ID_ADPCM_IMA_AMV,
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357 AV_CODEC_ID_ADPCM_EA_R1,
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358 AV_CODEC_ID_ADPCM_EA_R3,
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359 AV_CODEC_ID_ADPCM_EA_R2,
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360 AV_CODEC_ID_ADPCM_IMA_EA_SEAD,
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361 AV_CODEC_ID_ADPCM_IMA_EA_EACS,
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362 AV_CODEC_ID_ADPCM_EA_XAS,
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363 AV_CODEC_ID_ADPCM_EA_MAXIS_XA,
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364 AV_CODEC_ID_ADPCM_IMA_ISS,
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365 AV_CODEC_ID_ADPCM_G722,
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366 AV_CODEC_ID_ADPCM_IMA_APC,
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367 AV_CODEC_ID_VIMA = MKBETAG('V','I','M','A'),
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368 AV_CODEC_ID_ADPCM_AFC = MKBETAG('A','F','C',' '),
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369 AV_CODEC_ID_ADPCM_IMA_OKI = MKBETAG('O','K','I',' '),
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370 AV_CODEC_ID_ADPCM_DTK = MKBETAG('D','T','K',' '),
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371 AV_CODEC_ID_ADPCM_IMA_RAD = MKBETAG('R','A','D',' '),
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372
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373 /* AMR */
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374 AV_CODEC_ID_AMR_NB = 0x12000,
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375 AV_CODEC_ID_AMR_WB,
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376
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377 /* RealAudio codecs*/
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378 AV_CODEC_ID_RA_144 = 0x13000,
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379 AV_CODEC_ID_RA_288,
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380
|
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381 /* various DPCM codecs */
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382 AV_CODEC_ID_ROQ_DPCM = 0x14000,
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383 AV_CODEC_ID_INTERPLAY_DPCM,
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384 AV_CODEC_ID_XAN_DPCM,
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385 AV_CODEC_ID_SOL_DPCM,
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386
|
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387 /* audio codecs */
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388 AV_CODEC_ID_MP2 = 0x15000,
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389 AV_CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3
|
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390 AV_CODEC_ID_AAC,
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391 AV_CODEC_ID_AC3,
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392 AV_CODEC_ID_DTS,
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393 AV_CODEC_ID_VORBIS,
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394 AV_CODEC_ID_DVAUDIO,
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395 AV_CODEC_ID_WMAV1,
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396 AV_CODEC_ID_WMAV2,
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|
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397 AV_CODEC_ID_MACE3,
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|
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398 AV_CODEC_ID_MACE6,
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|
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399 AV_CODEC_ID_VMDAUDIO,
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|
|
400 AV_CODEC_ID_FLAC,
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|
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401 AV_CODEC_ID_MP3ADU,
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|
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402 AV_CODEC_ID_MP3ON4,
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|
|
403 AV_CODEC_ID_SHORTEN,
|
|
|
404 AV_CODEC_ID_ALAC,
|
|
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405 AV_CODEC_ID_WESTWOOD_SND1,
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|
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406 AV_CODEC_ID_GSM, ///< as in Berlin toast format
|
|
|
407 AV_CODEC_ID_QDM2,
|
|
|
408 AV_CODEC_ID_COOK,
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|
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409 AV_CODEC_ID_TRUESPEECH,
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|
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410 AV_CODEC_ID_TTA,
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|
|
411 AV_CODEC_ID_SMACKAUDIO,
|
|
|
412 AV_CODEC_ID_QCELP,
|
|
|
413 AV_CODEC_ID_WAVPACK,
|
|
|
414 AV_CODEC_ID_DSICINAUDIO,
|
|
|
415 AV_CODEC_ID_IMC,
|
|
|
416 AV_CODEC_ID_MUSEPACK7,
|
|
|
417 AV_CODEC_ID_MLP,
|
|
|
418 AV_CODEC_ID_GSM_MS, /* as found in WAV */
|
|
|
419 AV_CODEC_ID_ATRAC3,
|
|
|
420 AV_CODEC_ID_VOXWARE,
|
|
|
421 AV_CODEC_ID_APE,
|
|
|
422 AV_CODEC_ID_NELLYMOSER,
|
|
|
423 AV_CODEC_ID_MUSEPACK8,
|
|
|
424 AV_CODEC_ID_SPEEX,
|
|
|
425 AV_CODEC_ID_WMAVOICE,
|
|
|
426 AV_CODEC_ID_WMAPRO,
|
|
|
427 AV_CODEC_ID_WMALOSSLESS,
|
|
|
428 AV_CODEC_ID_ATRAC3P,
|
|
|
429 AV_CODEC_ID_EAC3,
|
|
|
430 AV_CODEC_ID_SIPR,
|
|
|
431 AV_CODEC_ID_MP1,
|
|
|
432 AV_CODEC_ID_TWINVQ,
|
|
|
433 AV_CODEC_ID_TRUEHD,
|
|
|
434 AV_CODEC_ID_MP4ALS,
|
|
|
435 AV_CODEC_ID_ATRAC1,
|
|
|
436 AV_CODEC_ID_BINKAUDIO_RDFT,
|
|
|
437 AV_CODEC_ID_BINKAUDIO_DCT,
|
|
|
438 AV_CODEC_ID_AAC_LATM,
|
|
|
439 AV_CODEC_ID_QDMC,
|
|
|
440 AV_CODEC_ID_CELT,
|
|
|
441 AV_CODEC_ID_G723_1,
|
|
|
442 AV_CODEC_ID_G729,
|
|
|
443 AV_CODEC_ID_8SVX_EXP,
|
|
|
444 AV_CODEC_ID_8SVX_FIB,
|
|
|
445 AV_CODEC_ID_BMV_AUDIO,
|
|
|
446 AV_CODEC_ID_RALF,
|
|
|
447 AV_CODEC_ID_IAC,
|
|
|
448 AV_CODEC_ID_ILBC,
|
|
|
449 AV_CODEC_ID_OPUS_DEPRECATED,
|
|
|
450 AV_CODEC_ID_COMFORT_NOISE,
|
|
|
451 AV_CODEC_ID_TAK_DEPRECATED,
|
|
|
452 AV_CODEC_ID_FFWAVESYNTH = MKBETAG('F','F','W','S'),
|
|
|
453 AV_CODEC_ID_SONIC = MKBETAG('S','O','N','C'),
|
|
|
454 AV_CODEC_ID_SONIC_LS = MKBETAG('S','O','N','L'),
|
|
|
455 AV_CODEC_ID_PAF_AUDIO = MKBETAG('P','A','F','A'),
|
|
|
456 AV_CODEC_ID_OPUS = MKBETAG('O','P','U','S'),
|
|
|
457 AV_CODEC_ID_TAK = MKBETAG('t','B','a','K'),
|
|
|
458 AV_CODEC_ID_EVRC = MKBETAG('s','e','v','c'),
|
|
|
459 AV_CODEC_ID_SMV = MKBETAG('s','s','m','v'),
|
|
|
460
|
|
|
461 /* subtitle codecs */
|
|
|
462 AV_CODEC_ID_FIRST_SUBTITLE = 0x17000, ///< A dummy ID pointing at the start of subtitle codecs.
|
|
|
463 AV_CODEC_ID_DVD_SUBTITLE = 0x17000,
|
|
|
464 AV_CODEC_ID_DVB_SUBTITLE,
|
|
|
465 AV_CODEC_ID_TEXT, ///< raw UTF-8 text
|
|
|
466 AV_CODEC_ID_XSUB,
|
|
|
467 AV_CODEC_ID_SSA,
|
|
|
468 AV_CODEC_ID_MOV_TEXT,
|
|
|
469 AV_CODEC_ID_HDMV_PGS_SUBTITLE,
|
|
|
470 AV_CODEC_ID_DVB_TELETEXT,
|
|
|
471 AV_CODEC_ID_SRT,
|
|
|
472 AV_CODEC_ID_MICRODVD = MKBETAG('m','D','V','D'),
|
|
|
473 AV_CODEC_ID_EIA_608 = MKBETAG('c','6','0','8'),
|
|
|
474 AV_CODEC_ID_JACOSUB = MKBETAG('J','S','U','B'),
|
|
|
475 AV_CODEC_ID_SAMI = MKBETAG('S','A','M','I'),
|
|
|
476 AV_CODEC_ID_REALTEXT = MKBETAG('R','T','X','T'),
|
|
|
477 AV_CODEC_ID_SUBVIEWER1 = MKBETAG('S','b','V','1'),
|
|
|
478 AV_CODEC_ID_SUBVIEWER = MKBETAG('S','u','b','V'),
|
|
|
479 AV_CODEC_ID_SUBRIP = MKBETAG('S','R','i','p'),
|
|
|
480 AV_CODEC_ID_WEBVTT = MKBETAG('W','V','T','T'),
|
|
|
481 AV_CODEC_ID_MPL2 = MKBETAG('M','P','L','2'),
|
|
|
482 AV_CODEC_ID_VPLAYER = MKBETAG('V','P','l','r'),
|
|
|
483 AV_CODEC_ID_PJS = MKBETAG('P','h','J','S'),
|
|
|
484 AV_CODEC_ID_ASS = MKBETAG('A','S','S',' '), ///< ASS as defined in Matroska
|
|
|
485
|
|
|
486 /* other specific kind of codecs (generally used for attachments) */
|
|
|
487 AV_CODEC_ID_FIRST_UNKNOWN = 0x18000, ///< A dummy ID pointing at the start of various fake codecs.
|
|
|
488 AV_CODEC_ID_TTF = 0x18000,
|
|
|
489 AV_CODEC_ID_BINTEXT = MKBETAG('B','T','X','T'),
|
|
|
490 AV_CODEC_ID_XBIN = MKBETAG('X','B','I','N'),
|
|
|
491 AV_CODEC_ID_IDF = MKBETAG( 0 ,'I','D','F'),
|
|
|
492 AV_CODEC_ID_OTF = MKBETAG( 0 ,'O','T','F'),
|
|
|
493 AV_CODEC_ID_SMPTE_KLV = MKBETAG('K','L','V','A'),
|
|
|
494 AV_CODEC_ID_DVD_NAV = MKBETAG('D','N','A','V'),
|
|
|
495
|
|
|
496
|
|
|
497 AV_CODEC_ID_PROBE = 0x19000, ///< codec_id is not known (like AV_CODEC_ID_NONE) but lavf should attempt to identify it
|
|
|
498
|
|
|
499 AV_CODEC_ID_MPEG2TS = 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS
|
|
|
500 * stream (only used by libavformat) */
|
|
|
501 AV_CODEC_ID_MPEG4SYSTEMS = 0x20001, /**< _FAKE_ codec to indicate a MPEG-4 Systems
|
|
|
502 * stream (only used by libavformat) */
|
|
|
503 AV_CODEC_ID_FFMETADATA = 0x21000, ///< Dummy codec for streams containing only metadata information.
|
|
|
504
|
|
|
505 #if FF_API_CODEC_ID
|
|
|
506 #include "old_codec_ids.h"
|
|
|
507 #endif
|
|
|
508 };
|
|
|
509
|
|
|
510 /**
|
|
|
511 * This struct describes the properties of a single codec described by an
|
|
|
512 * AVCodecID.
|
|
|
513 * @see avcodec_get_descriptor()
|
|
|
514 */
|
|
|
515 typedef struct AVCodecDescriptor {
|
|
|
516 enum AVCodecID id;
|
|
|
517 enum AVMediaType type;
|
|
|
518 /**
|
|
|
519 * Name of the codec described by this descriptor. It is non-empty and
|
|
|
520 * unique for each codec descriptor. It should contain alphanumeric
|
|
|
521 * characters and '_' only.
|
|
|
522 */
|
|
|
523 const char *name;
|
|
|
524 /**
|
|
|
525 * A more descriptive name for this codec. May be NULL.
|
|
|
526 */
|
|
|
527 const char *long_name;
|
|
|
528 /**
|
|
|
529 * Codec properties, a combination of AV_CODEC_PROP_* flags.
|
|
|
530 */
|
|
|
531 int props;
|
|
|
532 } AVCodecDescriptor;
|
|
|
533
|
|
|
534 /**
|
|
|
535 * Codec uses only intra compression.
|
|
|
536 * Video codecs only.
|
|
|
537 */
|
|
|
538 #define AV_CODEC_PROP_INTRA_ONLY (1 << 0)
|
|
|
539 /**
|
|
|
540 * Codec supports lossy compression. Audio and video codecs only.
|
|
|
541 * @note a codec may support both lossy and lossless
|
|
|
542 * compression modes
|
|
|
543 */
|
|
|
544 #define AV_CODEC_PROP_LOSSY (1 << 1)
|
|
|
545 /**
|
|
|
546 * Codec supports lossless compression. Audio and video codecs only.
|
|
|
547 */
|
|
|
548 #define AV_CODEC_PROP_LOSSLESS (1 << 2)
|
|
|
549 /**
|
|
|
550 * Subtitle codec is bitmap based
|
|
|
551 * Decoded AVSubtitle data can be read from the AVSubtitleRect->pict field.
|
|
|
552 */
|
|
|
553 #define AV_CODEC_PROP_BITMAP_SUB (1 << 16)
|
|
|
554 /**
|
|
|
555 * Subtitle codec is text based.
|
|
|
556 * Decoded AVSubtitle data can be read from the AVSubtitleRect->ass field.
|
|
|
557 */
|
|
|
558 #define AV_CODEC_PROP_TEXT_SUB (1 << 17)
|
|
|
559
|
|
|
560 /**
|
|
|
561 * @ingroup lavc_decoding
|
|
|
562 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
|
|
|
563 * This is mainly needed because some optimized bitstream readers read
|
|
|
564 * 32 or 64 bit at once and could read over the end.<br>
|
|
|
565 * Note: If the first 23 bits of the additional bytes are not 0, then damaged
|
|
|
566 * MPEG bitstreams could cause overread and segfault.
|
|
|
567 */
|
|
|
568 #define FF_INPUT_BUFFER_PADDING_SIZE 16
|
|
|
569
|
|
|
570 /**
|
|
|
571 * @ingroup lavc_encoding
|
|
|
572 * minimum encoding buffer size
|
|
|
573 * Used to avoid some checks during header writing.
|
|
|
574 */
|
|
|
575 #define FF_MIN_BUFFER_SIZE 16384
|
|
|
576
|
|
|
577
|
|
|
578 /**
|
|
|
579 * @ingroup lavc_encoding
|
|
|
580 * motion estimation type.
|
|
|
581 */
|
|
|
582 enum Motion_Est_ID {
|
|
|
583 ME_ZERO = 1, ///< no search, that is use 0,0 vector whenever one is needed
|
|
|
584 ME_FULL,
|
|
|
585 ME_LOG,
|
|
|
586 ME_PHODS,
|
|
|
587 ME_EPZS, ///< enhanced predictive zonal search
|
|
|
588 ME_X1, ///< reserved for experiments
|
|
|
589 ME_HEX, ///< hexagon based search
|
|
|
590 ME_UMH, ///< uneven multi-hexagon search
|
|
|
591 ME_TESA, ///< transformed exhaustive search algorithm
|
|
|
592 ME_ITER=50, ///< iterative search
|
|
|
593 };
|
|
|
594
|
|
|
595 /**
|
|
|
596 * @ingroup lavc_decoding
|
|
|
597 */
|
|
|
598 enum AVDiscard{
|
|
|
599 /* We leave some space between them for extensions (drop some
|
|
|
600 * keyframes for intra-only or drop just some bidir frames). */
|
|
|
601 AVDISCARD_NONE =-16, ///< discard nothing
|
|
|
602 AVDISCARD_DEFAULT = 0, ///< discard useless packets like 0 size packets in avi
|
|
|
603 AVDISCARD_NONREF = 8, ///< discard all non reference
|
|
|
604 AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
|
|
|
605 AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
|
|
|
606 AVDISCARD_ALL = 48, ///< discard all
|
|
|
607 };
|
|
|
608
|
|
|
609 enum AVColorPrimaries{
|
|
|
610 AVCOL_PRI_BT709 = 1, ///< also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP177 Annex B
|
|
|
611 AVCOL_PRI_UNSPECIFIED = 2,
|
|
|
612 AVCOL_PRI_BT470M = 4,
|
|
|
613 AVCOL_PRI_BT470BG = 5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM
|
|
|
614 AVCOL_PRI_SMPTE170M = 6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC
|
|
|
615 AVCOL_PRI_SMPTE240M = 7, ///< functionally identical to above
|
|
|
616 AVCOL_PRI_FILM = 8,
|
|
|
617 AVCOL_PRI_NB , ///< Not part of ABI
|
|
|
618 };
|
|
|
619
|
|
|
620 enum AVColorTransferCharacteristic{
|
|
|
621 AVCOL_TRC_BT709 = 1, ///< also ITU-R BT1361
|
|
|
622 AVCOL_TRC_UNSPECIFIED = 2,
|
|
|
623 AVCOL_TRC_GAMMA22 = 4, ///< also ITU-R BT470M / ITU-R BT1700 625 PAL & SECAM
|
|
|
624 AVCOL_TRC_GAMMA28 = 5, ///< also ITU-R BT470BG
|
|
|
625 AVCOL_TRC_SMPTE240M = 7,
|
|
|
626 AVCOL_TRC_NB , ///< Not part of ABI
|
|
|
627 };
|
|
|
628
|
|
|
629 enum AVColorSpace{
|
|
|
630 AVCOL_SPC_RGB = 0,
|
|
|
631 AVCOL_SPC_BT709 = 1, ///< also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
|
|
|
632 AVCOL_SPC_UNSPECIFIED = 2,
|
|
|
633 AVCOL_SPC_FCC = 4,
|
|
|
634 AVCOL_SPC_BT470BG = 5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM / IEC 61966-2-4 xvYCC601
|
|
|
635 AVCOL_SPC_SMPTE170M = 6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC / functionally identical to above
|
|
|
636 AVCOL_SPC_SMPTE240M = 7,
|
|
|
637 AVCOL_SPC_YCOCG = 8, ///< Used by Dirac / VC-2 and H.264 FRext, see ITU-T SG16
|
|
|
638 AVCOL_SPC_NB , ///< Not part of ABI
|
|
|
639 };
|
|
|
640 #define AVCOL_SPC_YCGCO AVCOL_SPC_YCOCG
|
|
|
641
|
|
|
642 enum AVColorRange{
|
|
|
643 AVCOL_RANGE_UNSPECIFIED = 0,
|
|
|
644 AVCOL_RANGE_MPEG = 1, ///< the normal 219*2^(n-8) "MPEG" YUV ranges
|
|
|
645 AVCOL_RANGE_JPEG = 2, ///< the normal 2^n-1 "JPEG" YUV ranges
|
|
|
646 AVCOL_RANGE_NB , ///< Not part of ABI
|
|
|
647 };
|
|
|
648
|
|
|
649 /**
|
|
|
650 * X X 3 4 X X are luma samples,
|
|
|
651 * 1 2 1-6 are possible chroma positions
|
|
|
652 * X X 5 6 X 0 is undefined/unknown position
|
|
|
653 */
|
|
|
654 enum AVChromaLocation{
|
|
|
655 AVCHROMA_LOC_UNSPECIFIED = 0,
|
|
|
656 AVCHROMA_LOC_LEFT = 1, ///< mpeg2/4, h264 default
|
|
|
657 AVCHROMA_LOC_CENTER = 2, ///< mpeg1, jpeg, h263
|
|
|
658 AVCHROMA_LOC_TOPLEFT = 3, ///< DV
|
|
|
659 AVCHROMA_LOC_TOP = 4,
|
|
|
660 AVCHROMA_LOC_BOTTOMLEFT = 5,
|
|
|
661 AVCHROMA_LOC_BOTTOM = 6,
|
|
|
662 AVCHROMA_LOC_NB , ///< Not part of ABI
|
|
|
663 };
|
|
|
664
|
|
|
665 enum AVAudioServiceType {
|
|
|
666 AV_AUDIO_SERVICE_TYPE_MAIN = 0,
|
|
|
667 AV_AUDIO_SERVICE_TYPE_EFFECTS = 1,
|
|
|
668 AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED = 2,
|
|
|
669 AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED = 3,
|
|
|
670 AV_AUDIO_SERVICE_TYPE_DIALOGUE = 4,
|
|
|
671 AV_AUDIO_SERVICE_TYPE_COMMENTARY = 5,
|
|
|
672 AV_AUDIO_SERVICE_TYPE_EMERGENCY = 6,
|
|
|
673 AV_AUDIO_SERVICE_TYPE_VOICE_OVER = 7,
|
|
|
674 AV_AUDIO_SERVICE_TYPE_KARAOKE = 8,
|
|
|
675 AV_AUDIO_SERVICE_TYPE_NB , ///< Not part of ABI
|
|
|
676 };
|
|
|
677
|
|
|
678 /**
|
|
|
679 * @ingroup lavc_encoding
|
|
|
680 */
|
|
|
681 typedef struct RcOverride{
|
|
|
682 int start_frame;
|
|
|
683 int end_frame;
|
|
|
684 int qscale; // If this is 0 then quality_factor will be used instead.
|
|
|
685 float quality_factor;
|
|
|
686 } RcOverride;
|
|
|
687
|
|
|
688 #define FF_MAX_B_FRAMES 16
|
|
|
689
|
|
|
690 /* encoding support
|
|
|
691 These flags can be passed in AVCodecContext.flags before initialization.
|
|
|
692 Note: Not everything is supported yet.
|
|
|
693 */
|
|
|
694
|
|
|
695 /**
|
|
|
696 * Allow decoders to produce frames with data planes that are not aligned
|
|
|
697 * to CPU requirements (e.g. due to cropping).
|
|
|
698 */
|
|
|
699 #define CODEC_FLAG_UNALIGNED 0x0001
|
|
|
700 #define CODEC_FLAG_QSCALE 0x0002 ///< Use fixed qscale.
|
|
|
701 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / advanced prediction for H.263.
|
|
|
702 #define CODEC_FLAG_QPEL 0x0010 ///< Use qpel MC.
|
|
|
703 #define CODEC_FLAG_GMC 0x0020 ///< Use GMC.
|
|
|
704 #define CODEC_FLAG_MV0 0x0040 ///< Always try a MB with MV=<0,0>.
|
|
|
705 /**
|
|
|
706 * The parent program guarantees that the input for B-frames containing
|
|
|
707 * streams is not written to for at least s->max_b_frames+1 frames, if
|
|
|
708 * this is not set the input will be copied.
|
|
|
709 */
|
|
|
710 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
|
|
|
711 #define CODEC_FLAG_PASS1 0x0200 ///< Use internal 2pass ratecontrol in first pass mode.
|
|
|
712 #define CODEC_FLAG_PASS2 0x0400 ///< Use internal 2pass ratecontrol in second pass mode.
|
|
|
713 #define CODEC_FLAG_GRAY 0x2000 ///< Only decode/encode grayscale.
|
|
|
714 #define CODEC_FLAG_EMU_EDGE 0x4000 ///< Don't draw edges.
|
|
|
715 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding.
|
|
|
716 #define CODEC_FLAG_TRUNCATED 0x00010000 /** Input bitstream might be truncated at a random
|
|
|
717 location instead of only at frame boundaries. */
|
|
|
718 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< Normalize adaptive quantization.
|
|
|
719 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT.
|
|
|
720 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< Force low delay.
|
|
|
721 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< Place global headers in extradata instead of every keyframe.
|
|
|
722 #define CODEC_FLAG_BITEXACT 0x00800000 ///< Use only bitexact stuff (except (I)DCT).
|
|
|
723 /* Fx : Flag for h263+ extra options */
|
|
|
724 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction
|
|
|
725 #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
|
|
|
726 #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
|
|
|
727 #define CODEC_FLAG_CLOSED_GOP 0x80000000
|
|
|
728 #define CODEC_FLAG2_FAST 0x00000001 ///< Allow non spec compliant speedup tricks.
|
|
|
729 #define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< Skip bitstream encoding.
|
|
|
730 #define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< Place global headers at every keyframe instead of in extradata.
|
|
|
731 #define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format. DEPRECATED!!!!
|
|
|
732 #define CODEC_FLAG2_IGNORE_CROP 0x00010000 ///< Discard cropping information from SPS.
|
|
|
733
|
|
|
734 #define CODEC_FLAG2_CHUNKS 0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
|
|
|
735 #define CODEC_FLAG2_SHOW_ALL 0x00400000 ///< Show all frames before the first keyframe
|
|
|
736
|
|
|
737 /* Unsupported options :
|
|
|
738 * Syntax Arithmetic coding (SAC)
|
|
|
739 * Reference Picture Selection
|
|
|
740 * Independent Segment Decoding */
|
|
|
741 /* /Fx */
|
|
|
742 /* codec capabilities */
|
|
|
743
|
|
|
744 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback.
|
|
|
745 /**
|
|
|
746 * Codec uses get_buffer() for allocating buffers and supports custom allocators.
|
|
|
747 * If not set, it might not use get_buffer() at all or use operations that
|
|
|
748 * assume the buffer was allocated by avcodec_default_get_buffer.
|
|
|
749 */
|
|
|
750 #define CODEC_CAP_DR1 0x0002
|
|
|
751 #define CODEC_CAP_TRUNCATED 0x0008
|
|
|
752 /* Codec can export data for HW decoding (XvMC). */
|
|
|
753 #define CODEC_CAP_HWACCEL 0x0010
|
|
|
754 /**
|
|
|
755 * Encoder or decoder requires flushing with NULL input at the end in order to
|
|
|
756 * give the complete and correct output.
|
|
|
757 *
|
|
|
758 * NOTE: If this flag is not set, the codec is guaranteed to never be fed with
|
|
|
759 * with NULL data. The user can still send NULL data to the public encode
|
|
|
760 * or decode function, but libavcodec will not pass it along to the codec
|
|
|
761 * unless this flag is set.
|
|
|
762 *
|
|
|
763 * Decoders:
|
|
|
764 * The decoder has a non-zero delay and needs to be fed with avpkt->data=NULL,
|
|
|
765 * avpkt->size=0 at the end to get the delayed data until the decoder no longer
|
|
|
766 * returns frames.
|
|
|
767 *
|
|
|
768 * Encoders:
|
|
|
769 * The encoder needs to be fed with NULL data at the end of encoding until the
|
|
|
770 * encoder no longer returns data.
|
|
|
771 *
|
|
|
772 * NOTE: For encoders implementing the AVCodec.encode2() function, setting this
|
|
|
773 * flag also means that the encoder must set the pts and duration for
|
|
|
774 * each output packet. If this flag is not set, the pts and duration will
|
|
|
775 * be determined by libavcodec from the input frame.
|
|
|
776 */
|
|
|
777 #define CODEC_CAP_DELAY 0x0020
|
|
|
778 /**
|
|
|
779 * Codec can be fed a final frame with a smaller size.
|
|
|
780 * This can be used to prevent truncation of the last audio samples.
|
|
|
781 */
|
|
|
782 #define CODEC_CAP_SMALL_LAST_FRAME 0x0040
|
|
|
783 /**
|
|
|
784 * Codec can export data for HW decoding (VDPAU).
|
|
|
785 */
|
|
|
786 #define CODEC_CAP_HWACCEL_VDPAU 0x0080
|
|
|
787 /**
|
|
|
788 * Codec can output multiple frames per AVPacket
|
|
|
789 * Normally demuxers return one frame at a time, demuxers which do not do
|
|
|
790 * are connected to a parser to split what they return into proper frames.
|
|
|
791 * This flag is reserved to the very rare category of codecs which have a
|
|
|
792 * bitstream that cannot be split into frames without timeconsuming
|
|
|
793 * operations like full decoding. Demuxers carring such bitstreams thus
|
|
|
794 * may return multiple frames in a packet. This has many disadvantages like
|
|
|
795 * prohibiting stream copy in many cases thus it should only be considered
|
|
|
796 * as a last resort.
|
|
|
797 */
|
|
|
798 #define CODEC_CAP_SUBFRAMES 0x0100
|
|
|
799 /**
|
|
|
800 * Codec is experimental and is thus avoided in favor of non experimental
|
|
|
801 * encoders
|
|
|
802 */
|
|
|
803 #define CODEC_CAP_EXPERIMENTAL 0x0200
|
|
|
804 /**
|
|
|
805 * Codec should fill in channel configuration and samplerate instead of container
|
|
|
806 */
|
|
|
807 #define CODEC_CAP_CHANNEL_CONF 0x0400
|
|
|
808
|
|
|
809 /**
|
|
|
810 * Codec is able to deal with negative linesizes
|
|
|
811 */
|
|
|
812 #define CODEC_CAP_NEG_LINESIZES 0x0800
|
|
|
813
|
|
|
814 /**
|
|
|
815 * Codec supports frame-level multithreading.
|
|
|
816 */
|
|
|
817 #define CODEC_CAP_FRAME_THREADS 0x1000
|
|
|
818 /**
|
|
|
819 * Codec supports slice-based (or partition-based) multithreading.
|
|
|
820 */
|
|
|
821 #define CODEC_CAP_SLICE_THREADS 0x2000
|
|
|
822 /**
|
|
|
823 * Codec supports changed parameters at any point.
|
|
|
824 */
|
|
|
825 #define CODEC_CAP_PARAM_CHANGE 0x4000
|
|
|
826 /**
|
|
|
827 * Codec supports avctx->thread_count == 0 (auto).
|
|
|
828 */
|
|
|
829 #define CODEC_CAP_AUTO_THREADS 0x8000
|
|
|
830 /**
|
|
|
831 * Audio encoder supports receiving a different number of samples in each call.
|
|
|
832 */
|
|
|
833 #define CODEC_CAP_VARIABLE_FRAME_SIZE 0x10000
|
|
|
834 /**
|
|
|
835 * Codec is intra only.
|
|
|
836 */
|
|
|
837 #define CODEC_CAP_INTRA_ONLY 0x40000000
|
|
|
838 /**
|
|
|
839 * Codec is lossless.
|
|
|
840 */
|
|
|
841 #define CODEC_CAP_LOSSLESS 0x80000000
|
|
|
842
|
|
|
843 //The following defines may change, don't expect compatibility if you use them.
|
|
|
844 #define MB_TYPE_INTRA4x4 0x0001
|
|
|
845 #define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
|
|
|
846 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME H.264-specific
|
|
|
847 #define MB_TYPE_16x16 0x0008
|
|
|
848 #define MB_TYPE_16x8 0x0010
|
|
|
849 #define MB_TYPE_8x16 0x0020
|
|
|
850 #define MB_TYPE_8x8 0x0040
|
|
|
851 #define MB_TYPE_INTERLACED 0x0080
|
|
|
852 #define MB_TYPE_DIRECT2 0x0100 //FIXME
|
|
|
853 #define MB_TYPE_ACPRED 0x0200
|
|
|
854 #define MB_TYPE_GMC 0x0400
|
|
|
855 #define MB_TYPE_SKIP 0x0800
|
|
|
856 #define MB_TYPE_P0L0 0x1000
|
|
|
857 #define MB_TYPE_P1L0 0x2000
|
|
|
858 #define MB_TYPE_P0L1 0x4000
|
|
|
859 #define MB_TYPE_P1L1 0x8000
|
|
|
860 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
|
|
|
861 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
|
|
|
862 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
|
|
|
863 #define MB_TYPE_QUANT 0x00010000
|
|
|
864 #define MB_TYPE_CBP 0x00020000
|
|
|
865 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
|
|
|
866
|
|
|
867 /**
|
|
|
868 * Pan Scan area.
|
|
|
869 * This specifies the area which should be displayed.
|
|
|
870 * Note there may be multiple such areas for one frame.
|
|
|
871 */
|
|
|
872 typedef struct AVPanScan{
|
|
|
873 /**
|
|
|
874 * id
|
|
|
875 * - encoding: Set by user.
|
|
|
876 * - decoding: Set by libavcodec.
|
|
|
877 */
|
|
|
878 int id;
|
|
|
879
|
|
|
880 /**
|
|
|
881 * width and height in 1/16 pel
|
|
|
882 * - encoding: Set by user.
|
|
|
883 * - decoding: Set by libavcodec.
|
|
|
884 */
|
|
|
885 int width;
|
|
|
886 int height;
|
|
|
887
|
|
|
888 /**
|
|
|
889 * position of the top left corner in 1/16 pel for up to 3 fields/frames
|
|
|
890 * - encoding: Set by user.
|
|
|
891 * - decoding: Set by libavcodec.
|
|
|
892 */
|
|
|
893 int16_t position[3][2];
|
|
|
894 }AVPanScan;
|
|
|
895
|
|
|
896 #define FF_QSCALE_TYPE_MPEG1 0
|
|
|
897 #define FF_QSCALE_TYPE_MPEG2 1
|
|
|
898 #define FF_QSCALE_TYPE_H264 2
|
|
|
899 #define FF_QSCALE_TYPE_VP56 3
|
|
|
900
|
|
|
901 #if FF_API_GET_BUFFER
|
|
|
902 #define FF_BUFFER_TYPE_INTERNAL 1
|
|
|
903 #define FF_BUFFER_TYPE_USER 2 ///< direct rendering buffers (image is (de)allocated by user)
|
|
|
904 #define FF_BUFFER_TYPE_SHARED 4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared.
|
|
|
905 #define FF_BUFFER_TYPE_COPY 8 ///< Just a (modified) copy of some other buffer, don't deallocate anything.
|
|
|
906
|
|
|
907 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore).
|
|
|
908 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer.
|
|
|
909 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content.
|
|
|
910 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update).
|
|
|
911 #endif
|
|
|
912
|
|
|
913 /**
|
|
|
914 * The decoder will keep a reference to the frame and may reuse it later.
|
|
|
915 */
|
|
|
916 #define AV_GET_BUFFER_FLAG_REF (1 << 0)
|
|
|
917
|
|
|
918 /**
|
|
|
919 * @defgroup lavc_packet AVPacket
|
|
|
920 *
|
|
|
921 * Types and functions for working with AVPacket.
|
|
|
922 * @{
|
|
|
923 */
|
|
|
924 enum AVPacketSideDataType {
|
|
|
925 AV_PKT_DATA_PALETTE,
|
|
|
926 AV_PKT_DATA_NEW_EXTRADATA,
|
|
|
927
|
|
|
928 /**
|
|
|
929 * An AV_PKT_DATA_PARAM_CHANGE side data packet is laid out as follows:
|
|
|
930 * @code
|
|
|
931 * u32le param_flags
|
|
|
932 * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT)
|
|
|
933 * s32le channel_count
|
|
|
934 * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT)
|
|
|
935 * u64le channel_layout
|
|
|
936 * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE)
|
|
|
937 * s32le sample_rate
|
|
|
938 * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS)
|
|
|
939 * s32le width
|
|
|
940 * s32le height
|
|
|
941 * @endcode
|
|
|
942 */
|
|
|
943 AV_PKT_DATA_PARAM_CHANGE,
|
|
|
944
|
|
|
945 /**
|
|
|
946 * An AV_PKT_DATA_H263_MB_INFO side data packet contains a number of
|
|
|
947 * structures with info about macroblocks relevant to splitting the
|
|
|
948 * packet into smaller packets on macroblock edges (e.g. as for RFC 2190).
|
|
|
949 * That is, it does not necessarily contain info about all macroblocks,
|
|
|
950 * as long as the distance between macroblocks in the info is smaller
|
|
|
951 * than the target payload size.
|
|
|
952 * Each MB info structure is 12 bytes, and is laid out as follows:
|
|
|
953 * @code
|
|
|
954 * u32le bit offset from the start of the packet
|
|
|
955 * u8 current quantizer at the start of the macroblock
|
|
|
956 * u8 GOB number
|
|
|
957 * u16le macroblock address within the GOB
|
|
|
958 * u8 horizontal MV predictor
|
|
|
959 * u8 vertical MV predictor
|
|
|
960 * u8 horizontal MV predictor for block number 3
|
|
|
961 * u8 vertical MV predictor for block number 3
|
|
|
962 * @endcode
|
|
|
963 */
|
|
|
964 AV_PKT_DATA_H263_MB_INFO,
|
|
|
965
|
|
|
966 /**
|
|
|
967 * Recommmends skipping the specified number of samples
|
|
|
968 * @code
|
|
|
969 * u32le number of samples to skip from start of this packet
|
|
|
970 * u32le number of samples to skip from end of this packet
|
|
|
971 * u8 reason for start skip
|
|
|
972 * u8 reason for end skip (0=padding silence, 1=convergence)
|
|
|
973 * @endcode
|
|
|
974 */
|
|
|
975 AV_PKT_DATA_SKIP_SAMPLES=70,
|
|
|
976
|
|
|
977 /**
|
|
|
978 * An AV_PKT_DATA_JP_DUALMONO side data packet indicates that
|
|
|
979 * the packet may contain "dual mono" audio specific to Japanese DTV
|
|
|
980 * and if it is true, recommends only the selected channel to be used.
|
|
|
981 * @code
|
|
|
982 * u8 selected channels (0=mail/left, 1=sub/right, 2=both)
|
|
|
983 * @endcode
|
|
|
984 */
|
|
|
985 AV_PKT_DATA_JP_DUALMONO,
|
|
|
986
|
|
|
987 /**
|
|
|
988 * A list of zero terminated key/value strings. There is no end marker for
|
|
|
989 * the list, so it is required to rely on the side data size to stop.
|
|
|
990 */
|
|
|
991 AV_PKT_DATA_STRINGS_METADATA,
|
|
|
992
|
|
|
993 /**
|
|
|
994 * Subtitle event position
|
|
|
995 * @code
|
|
|
996 * u32le x1
|
|
|
997 * u32le y1
|
|
|
998 * u32le x2
|
|
|
999 * u32le y2
|
|
|
1000 * @endcode
|
|
|
1001 */
|
|
|
1002 AV_PKT_DATA_SUBTITLE_POSITION,
|
|
|
1003
|
|
|
1004 /**
|
|
|
1005 * Data found in BlockAdditional element of matroska container. There is
|
|
|
1006 * no end marker for the data, so it is required to rely on the side data
|
|
|
1007 * size to recognize the end. 8 byte id (as found in BlockAddId) followed
|
|
|
1008 * by data.
|
|
|
1009 */
|
|
|
1010 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
|
|
|
1011 };
|
|
|
1012
|
|
|
1013 /**
|
|
|
1014 * This structure stores compressed data. It is typically exported by demuxers
|
|
|
1015 * and then passed as input to decoders, or received as output from encoders and
|
|
|
1016 * then passed to muxers.
|
|
|
1017 *
|
|
|
1018 * For video, it should typically contain one compressed frame. For audio it may
|
|
|
1019 * contain several compressed frames.
|
|
|
1020 *
|
|
|
1021 * AVPacket is one of the few structs in FFmpeg, whose size is a part of public
|
|
|
1022 * ABI. Thus it may be allocated on stack and no new fields can be added to it
|
|
|
1023 * without libavcodec and libavformat major bump.
|
|
|
1024 *
|
|
|
1025 * The semantics of data ownership depends on the buf or destruct (deprecated)
|
|
|
1026 * fields. If either is set, the packet data is dynamically allocated and is
|
|
|
1027 * valid indefinitely until av_free_packet() is called (which in turn calls
|
|
|
1028 * av_buffer_unref()/the destruct callback to free the data). If neither is set,
|
|
|
1029 * the packet data is typically backed by some static buffer somewhere and is
|
|
|
1030 * only valid for a limited time (e.g. until the next read call when demuxing).
|
|
|
1031 *
|
|
|
1032 * The side data is always allocated with av_malloc() and is freed in
|
|
|
1033 * av_free_packet().
|
|
|
1034 */
|
|
|
1035 typedef struct AVPacket {
|
|
|
1036 /**
|
|
|
1037 * A reference to the reference-counted buffer where the packet data is
|
|
|
1038 * stored.
|
|
|
1039 * May be NULL, then the packet data is not reference-counted.
|
|
|
1040 */
|
|
|
1041 AVBufferRef *buf;
|
|
|
1042 /**
|
|
|
1043 * Presentation timestamp in AVStream->time_base units; the time at which
|
|
|
1044 * the decompressed packet will be presented to the user.
|
|
|
1045 * Can be AV_NOPTS_VALUE if it is not stored in the file.
|
|
|
1046 * pts MUST be larger or equal to dts as presentation cannot happen before
|
|
|
1047 * decompression, unless one wants to view hex dumps. Some formats misuse
|
|
|
1048 * the terms dts and pts/cts to mean something different. Such timestamps
|
|
|
1049 * must be converted to true pts/dts before they are stored in AVPacket.
|
|
|
1050 */
|
|
|
1051 int64_t pts;
|
|
|
1052 /**
|
|
|
1053 * Decompression timestamp in AVStream->time_base units; the time at which
|
|
|
1054 * the packet is decompressed.
|
|
|
1055 * Can be AV_NOPTS_VALUE if it is not stored in the file.
|
|
|
1056 */
|
|
|
1057 int64_t dts;
|
|
|
1058 uint8_t *data;
|
|
|
1059 int size;
|
|
|
1060 int stream_index;
|
|
|
1061 /**
|
|
|
1062 * A combination of AV_PKT_FLAG values
|
|
|
1063 */
|
|
|
1064 int flags;
|
|
|
1065 /**
|
|
|
1066 * Additional packet data that can be provided by the container.
|
|
|
1067 * Packet can contain several types of side information.
|
|
|
1068 */
|
|
|
1069 struct {
|
|
|
1070 uint8_t *data;
|
|
|
1071 int size;
|
|
|
1072 enum AVPacketSideDataType type;
|
|
|
1073 } *side_data;
|
|
|
1074 int side_data_elems;
|
|
|
1075
|
|
|
1076 /**
|
|
|
1077 * Duration of this packet in AVStream->time_base units, 0 if unknown.
|
|
|
1078 * Equals next_pts - this_pts in presentation order.
|
|
|
1079 */
|
|
|
1080 int duration;
|
|
|
1081 #if FF_API_DESTRUCT_PACKET
|
|
|
1082 attribute_deprecated
|
|
|
1083 void (*destruct)(struct AVPacket *);
|
|
|
1084 attribute_deprecated
|
|
|
1085 void *priv;
|
|
|
1086 #endif
|
|
|
1087 int64_t pos; ///< byte position in stream, -1 if unknown
|
|
|
1088
|
|
|
1089 /**
|
|
|
1090 * Time difference in AVStream->time_base units from the pts of this
|
|
|
1091 * packet to the point at which the output from the decoder has converged
|
|
|
1092 * independent from the availability of previous frames. That is, the
|
|
|
1093 * frames are virtually identical no matter if decoding started from
|
|
|
1094 * the very first frame or from this keyframe.
|
|
|
1095 * Is AV_NOPTS_VALUE if unknown.
|
|
|
1096 * This field is not the display duration of the current packet.
|
|
|
1097 * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
|
|
|
1098 * set.
|
|
|
1099 *
|
|
|
1100 * The purpose of this field is to allow seeking in streams that have no
|
|
|
1101 * keyframes in the conventional sense. It corresponds to the
|
|
|
1102 * recovery point SEI in H.264 and match_time_delta in NUT. It is also
|
|
|
1103 * essential for some types of subtitle streams to ensure that all
|
|
|
1104 * subtitles are correctly displayed after seeking.
|
|
|
1105 */
|
|
|
1106 int64_t convergence_duration;
|
|
|
1107 } AVPacket;
|
|
|
1108 #define AV_PKT_FLAG_KEY 0x0001 ///< The packet contains a keyframe
|
|
|
1109 #define AV_PKT_FLAG_CORRUPT 0x0002 ///< The packet content is corrupted
|
|
|
1110
|
|
|
1111 enum AVSideDataParamChangeFlags {
|
|
|
1112 AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT = 0x0001,
|
|
|
1113 AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT = 0x0002,
|
|
|
1114 AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE = 0x0004,
|
|
|
1115 AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS = 0x0008,
|
|
|
1116 };
|
|
|
1117 /**
|
|
|
1118 * @}
|
|
|
1119 */
|
|
|
1120
|
|
|
1121 struct AVCodecInternal;
|
|
|
1122
|
|
|
1123 enum AVFieldOrder {
|
|
|
1124 AV_FIELD_UNKNOWN,
|
|
|
1125 AV_FIELD_PROGRESSIVE,
|
|
|
1126 AV_FIELD_TT, //< Top coded_first, top displayed first
|
|
|
1127 AV_FIELD_BB, //< Bottom coded first, bottom displayed first
|
|
|
1128 AV_FIELD_TB, //< Top coded first, bottom displayed first
|
|
|
1129 AV_FIELD_BT, //< Bottom coded first, top displayed first
|
|
|
1130 };
|
|
|
1131
|
|
|
1132 /**
|
|
|
1133 * main external API structure.
|
|
|
1134 * New fields can be added to the end with minor version bumps.
|
|
|
1135 * Removal, reordering and changes to existing fields require a major
|
|
|
1136 * version bump.
|
|
|
1137 * Please use AVOptions (av_opt* / av_set/get*()) to access these fields from user
|
|
|
1138 * applications.
|
|
|
1139 * sizeof(AVCodecContext) must not be used outside libav*.
|
|
|
1140 */
|
|
|
1141 typedef struct AVCodecContext {
|
|
|
1142 /**
|
|
|
1143 * information on struct for av_log
|
|
|
1144 * - set by avcodec_alloc_context3
|
|
|
1145 */
|
|
|
1146 const AVClass *av_class;
|
|
|
1147 int log_level_offset;
|
|
|
1148
|
|
|
1149 enum AVMediaType codec_type; /* see AVMEDIA_TYPE_xxx */
|
|
|
1150 const struct AVCodec *codec;
|
|
|
1151 char codec_name[32];
|
|
|
1152 enum AVCodecID codec_id; /* see AV_CODEC_ID_xxx */
|
|
|
1153
|
|
|
1154 /**
|
|
|
1155 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
|
|
|
1156 * This is used to work around some encoder bugs.
|
|
|
1157 * A demuxer should set this to what is stored in the field used to identify the codec.
|
|
|
1158 * If there are multiple such fields in a container then the demuxer should choose the one
|
|
|
1159 * which maximizes the information about the used codec.
|
|
|
1160 * If the codec tag field in a container is larger than 32 bits then the demuxer should
|
|
|
1161 * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
|
|
|
1162 * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
|
|
|
1163 * first.
|
|
|
1164 * - encoding: Set by user, if not then the default based on codec_id will be used.
|
|
|
1165 * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
|
|
|
1166 */
|
|
|
1167 unsigned int codec_tag;
|
|
|
1168
|
|
|
1169 /**
|
|
|
1170 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
|
|
|
1171 * This is used to work around some encoder bugs.
|
|
|
1172 * - encoding: unused
|
|
|
1173 * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
|
|
|
1174 */
|
|
|
1175 unsigned int stream_codec_tag;
|
|
|
1176
|
|
|
1177 void *priv_data;
|
|
|
1178
|
|
|
1179 /**
|
|
|
1180 * Private context used for internal data.
|
|
|
1181 *
|
|
|
1182 * Unlike priv_data, this is not codec-specific. It is used in general
|
|
|
1183 * libavcodec functions.
|
|
|
1184 */
|
|
|
1185 struct AVCodecInternal *internal;
|
|
|
1186
|
|
|
1187 /**
|
|
|
1188 * Private data of the user, can be used to carry app specific stuff.
|
|
|
1189 * - encoding: Set by user.
|
|
|
1190 * - decoding: Set by user.
|
|
|
1191 */
|
|
|
1192 void *opaque;
|
|
|
1193
|
|
|
1194 /**
|
|
|
1195 * the average bitrate
|
|
|
1196 * - encoding: Set by user; unused for constant quantizer encoding.
|
|
|
1197 * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.
|
|
|
1198 */
|
|
|
1199 int bit_rate;
|
|
|
1200
|
|
|
1201 /**
|
|
|
1202 * number of bits the bitstream is allowed to diverge from the reference.
|
|
|
1203 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
|
|
|
1204 * - encoding: Set by user; unused for constant quantizer encoding.
|
|
|
1205 * - decoding: unused
|
|
|
1206 */
|
|
|
1207 int bit_rate_tolerance;
|
|
|
1208
|
|
|
1209 /**
|
|
|
1210 * Global quality for codecs which cannot change it per frame.
|
|
|
1211 * This should be proportional to MPEG-1/2/4 qscale.
|
|
|
1212 * - encoding: Set by user.
|
|
|
1213 * - decoding: unused
|
|
|
1214 */
|
|
|
1215 int global_quality;
|
|
|
1216
|
|
|
1217 /**
|
|
|
1218 * - encoding: Set by user.
|
|
|
1219 * - decoding: unused
|
|
|
1220 */
|
|
|
1221 int compression_level;
|
|
|
1222 #define FF_COMPRESSION_DEFAULT -1
|
|
|
1223
|
|
|
1224 /**
|
|
|
1225 * CODEC_FLAG_*.
|
|
|
1226 * - encoding: Set by user.
|
|
|
1227 * - decoding: Set by user.
|
|
|
1228 */
|
|
|
1229 int flags;
|
|
|
1230
|
|
|
1231 /**
|
|
|
1232 * CODEC_FLAG2_*
|
|
|
1233 * - encoding: Set by user.
|
|
|
1234 * - decoding: Set by user.
|
|
|
1235 */
|
|
|
1236 int flags2;
|
|
|
1237
|
|
|
1238 /**
|
|
|
1239 * some codecs need / can use extradata like Huffman tables.
|
|
|
1240 * mjpeg: Huffman tables
|
|
|
1241 * rv10: additional flags
|
|
|
1242 * mpeg4: global headers (they can be in the bitstream or here)
|
|
|
1243 * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
|
|
|
1244 * than extradata_size to avoid prolems if it is read with the bitstream reader.
|
|
|
1245 * The bytewise contents of extradata must not depend on the architecture or CPU endianness.
|
|
|
1246 * - encoding: Set/allocated/freed by libavcodec.
|
|
|
1247 * - decoding: Set/allocated/freed by user.
|
|
|
1248 */
|
|
|
1249 uint8_t *extradata;
|
|
|
1250 int extradata_size;
|
|
|
1251
|
|
|
1252 /**
|
|
|
1253 * This is the fundamental unit of time (in seconds) in terms
|
|
|
1254 * of which frame timestamps are represented. For fixed-fps content,
|
|
|
1255 * timebase should be 1/framerate and timestamp increments should be
|
|
|
1256 * identically 1.
|
|
|
1257 * - encoding: MUST be set by user.
|
|
|
1258 * - decoding: Set by libavcodec.
|
|
|
1259 */
|
|
|
1260 AVRational time_base;
|
|
|
1261
|
|
|
1262 /**
|
|
|
1263 * For some codecs, the time base is closer to the field rate than the frame rate.
|
|
|
1264 * Most notably, H.264 and MPEG-2 specify time_base as half of frame duration
|
|
|
1265 * if no telecine is used ...
|
|
|
1266 *
|
|
|
1267 * Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2.
|
|
|
1268 */
|
|
|
1269 int ticks_per_frame;
|
|
|
1270
|
|
|
1271 /**
|
|
|
1272 * Codec delay.
|
|
|
1273 *
|
|
|
1274 * Encoding: Number of frames delay there will be from the encoder input to
|
|
|
1275 * the decoder output. (we assume the decoder matches the spec)
|
|
|
1276 * Decoding: Number of frames delay in addition to what a standard decoder
|
|
|
1277 * as specified in the spec would produce.
|
|
|
1278 *
|
|
|
1279 * Video:
|
|
|
1280 * Number of frames the decoded output will be delayed relative to the
|
|
|
1281 * encoded input.
|
|
|
1282 *
|
|
|
1283 * Audio:
|
|
|
1284 * For encoding, this is the number of "priming" samples added to the
|
|
|
1285 * beginning of the stream. The decoded output will be delayed by this
|
|
|
1286 * many samples relative to the input to the encoder. Note that this
|
|
|
1287 * field is purely informational and does not directly affect the pts
|
|
|
1288 * output by the encoder, which should always be based on the actual
|
|
|
1289 * presentation time, including any delay.
|
|
|
1290 * For decoding, this is the number of samples the decoder needs to
|
|
|
1291 * output before the decoder's output is valid. When seeking, you should
|
|
|
1292 * start decoding this many samples prior to your desired seek point.
|
|
|
1293 *
|
|
|
1294 * - encoding: Set by libavcodec.
|
|
|
1295 * - decoding: Set by libavcodec.
|
|
|
1296 */
|
|
|
1297 int delay;
|
|
|
1298
|
|
|
1299
|
|
|
1300 /* video only */
|
|
|
1301 /**
|
|
|
1302 * picture width / height.
|
|
|
1303 * - encoding: MUST be set by user.
|
|
|
1304 * - decoding: May be set by the user before opening the decoder if known e.g.
|
|
|
1305 * from the container. Some decoders will require the dimensions
|
|
|
1306 * to be set by the caller. During decoding, the decoder may
|
|
|
1307 * overwrite those values as required.
|
|
|
1308 */
|
|
|
1309 int width, height;
|
|
|
1310
|
|
|
1311 /**
|
|
|
1312 * Bitstream width / height, may be different from width/height e.g. when
|
|
|
1313 * the decoded frame is cropped before being output or lowres is enabled.
|
|
|
1314 * - encoding: unused
|
|
|
1315 * - decoding: May be set by the user before opening the decoder if known
|
|
|
1316 * e.g. from the container. During decoding, the decoder may
|
|
|
1317 * overwrite those values as required.
|
|
|
1318 */
|
|
|
1319 int coded_width, coded_height;
|
|
|
1320
|
|
|
1321 #define FF_ASPECT_EXTENDED 15
|
|
|
1322
|
|
|
1323 /**
|
|
|
1324 * the number of pictures in a group of pictures, or 0 for intra_only
|
|
|
1325 * - encoding: Set by user.
|
|
|
1326 * - decoding: unused
|
|
|
1327 */
|
|
|
1328 int gop_size;
|
|
|
1329
|
|
|
1330 /**
|
|
|
1331 * Pixel format, see AV_PIX_FMT_xxx.
|
|
|
1332 * May be set by the demuxer if known from headers.
|
|
|
1333 * May be overridden by the decoder if it knows better.
|
|
|
1334 * - encoding: Set by user.
|
|
|
1335 * - decoding: Set by user if known, overridden by libavcodec if known
|
|
|
1336 */
|
|
|
1337 enum AVPixelFormat pix_fmt;
|
|
|
1338
|
|
|
1339 /**
|
|
|
1340 * Motion estimation algorithm used for video coding.
|
|
|
1341 * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
|
|
|
1342 * 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific]
|
|
|
1343 * - encoding: MUST be set by user.
|
|
|
1344 * - decoding: unused
|
|
|
1345 */
|
|
|
1346 int me_method;
|
|
|
1347
|
|
|
1348 /**
|
|
|
1349 * If non NULL, 'draw_horiz_band' is called by the libavcodec
|
|
|
1350 * decoder to draw a horizontal band. It improves cache usage. Not
|
|
|
1351 * all codecs can do that. You must check the codec capabilities
|
|
|
1352 * beforehand.
|
|
|
1353 * When multithreading is used, it may be called from multiple threads
|
|
|
1354 * at the same time; threads might draw different parts of the same AVFrame,
|
|
|
1355 * or multiple AVFrames, and there is no guarantee that slices will be drawn
|
|
|
1356 * in order.
|
|
|
1357 * The function is also used by hardware acceleration APIs.
|
|
|
1358 * It is called at least once during frame decoding to pass
|
|
|
1359 * the data needed for hardware render.
|
|
|
1360 * In that mode instead of pixel data, AVFrame points to
|
|
|
1361 * a structure specific to the acceleration API. The application
|
|
|
1362 * reads the structure and can change some fields to indicate progress
|
|
|
1363 * or mark state.
|
|
|
1364 * - encoding: unused
|
|
|
1365 * - decoding: Set by user.
|
|
|
1366 * @param height the height of the slice
|
|
|
1367 * @param y the y position of the slice
|
|
|
1368 * @param type 1->top field, 2->bottom field, 3->frame
|
|
|
1369 * @param offset offset into the AVFrame.data from which the slice should be read
|
|
|
1370 */
|
|
|
1371 void (*draw_horiz_band)(struct AVCodecContext *s,
|
|
|
1372 const AVFrame *src, int offset[AV_NUM_DATA_POINTERS],
|
|
|
1373 int y, int type, int height);
|
|
|
1374
|
|
|
1375 /**
|
|
|
1376 * callback to negotiate the pixelFormat
|
|
|
1377 * @param fmt is the list of formats which are supported by the codec,
|
|
|
1378 * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
|
|
|
1379 * The first is always the native one.
|
|
|
1380 * @return the chosen format
|
|
|
1381 * - encoding: unused
|
|
|
1382 * - decoding: Set by user, if not set the native format will be chosen.
|
|
|
1383 */
|
|
|
1384 enum AVPixelFormat (*get_format)(struct AVCodecContext *s, const enum AVPixelFormat * fmt);
|
|
|
1385
|
|
|
1386 /**
|
|
|
1387 * maximum number of B-frames between non-B-frames
|
|
|
1388 * Note: The output will be delayed by max_b_frames+1 relative to the input.
|
|
|
1389 * - encoding: Set by user.
|
|
|
1390 * - decoding: unused
|
|
|
1391 */
|
|
|
1392 int max_b_frames;
|
|
|
1393
|
|
|
1394 /**
|
|
|
1395 * qscale factor between IP and B-frames
|
|
|
1396 * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
|
|
|
1397 * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
|
|
|
1398 * - encoding: Set by user.
|
|
|
1399 * - decoding: unused
|
|
|
1400 */
|
|
|
1401 float b_quant_factor;
|
|
|
1402
|
|
|
1403 /** obsolete FIXME remove */
|
|
|
1404 int rc_strategy;
|
|
|
1405 #define FF_RC_STRATEGY_XVID 1
|
|
|
1406
|
|
|
1407 int b_frame_strategy;
|
|
|
1408
|
|
|
1409 /**
|
|
|
1410 * qscale offset between IP and B-frames
|
|
|
1411 * - encoding: Set by user.
|
|
|
1412 * - decoding: unused
|
|
|
1413 */
|
|
|
1414 float b_quant_offset;
|
|
|
1415
|
|
|
1416 /**
|
|
|
1417 * Size of the frame reordering buffer in the decoder.
|
|
|
1418 * For MPEG-2 it is 1 IPB or 0 low delay IP.
|
|
|
1419 * - encoding: Set by libavcodec.
|
|
|
1420 * - decoding: Set by libavcodec.
|
|
|
1421 */
|
|
|
1422 int has_b_frames;
|
|
|
1423
|
|
|
1424 /**
|
|
|
1425 * 0-> h263 quant 1-> mpeg quant
|
|
|
1426 * - encoding: Set by user.
|
|
|
1427 * - decoding: unused
|
|
|
1428 */
|
|
|
1429 int mpeg_quant;
|
|
|
1430
|
|
|
1431 /**
|
|
|
1432 * qscale factor between P and I-frames
|
|
|
1433 * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
|
|
|
1434 * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
|
|
|
1435 * - encoding: Set by user.
|
|
|
1436 * - decoding: unused
|
|
|
1437 */
|
|
|
1438 float i_quant_factor;
|
|
|
1439
|
|
|
1440 /**
|
|
|
1441 * qscale offset between P and I-frames
|
|
|
1442 * - encoding: Set by user.
|
|
|
1443 * - decoding: unused
|
|
|
1444 */
|
|
|
1445 float i_quant_offset;
|
|
|
1446
|
|
|
1447 /**
|
|
|
1448 * luminance masking (0-> disabled)
|
|
|
1449 * - encoding: Set by user.
|
|
|
1450 * - decoding: unused
|
|
|
1451 */
|
|
|
1452 float lumi_masking;
|
|
|
1453
|
|
|
1454 /**
|
|
|
1455 * temporary complexity masking (0-> disabled)
|
|
|
1456 * - encoding: Set by user.
|
|
|
1457 * - decoding: unused
|
|
|
1458 */
|
|
|
1459 float temporal_cplx_masking;
|
|
|
1460
|
|
|
1461 /**
|
|
|
1462 * spatial complexity masking (0-> disabled)
|
|
|
1463 * - encoding: Set by user.
|
|
|
1464 * - decoding: unused
|
|
|
1465 */
|
|
|
1466 float spatial_cplx_masking;
|
|
|
1467
|
|
|
1468 /**
|
|
|
1469 * p block masking (0-> disabled)
|
|
|
1470 * - encoding: Set by user.
|
|
|
1471 * - decoding: unused
|
|
|
1472 */
|
|
|
1473 float p_masking;
|
|
|
1474
|
|
|
1475 /**
|
|
|
1476 * darkness masking (0-> disabled)
|
|
|
1477 * - encoding: Set by user.
|
|
|
1478 * - decoding: unused
|
|
|
1479 */
|
|
|
1480 float dark_masking;
|
|
|
1481
|
|
|
1482 /**
|
|
|
1483 * slice count
|
|
|
1484 * - encoding: Set by libavcodec.
|
|
|
1485 * - decoding: Set by user (or 0).
|
|
|
1486 */
|
|
|
1487 int slice_count;
|
|
|
1488 /**
|
|
|
1489 * prediction method (needed for huffyuv)
|
|
|
1490 * - encoding: Set by user.
|
|
|
1491 * - decoding: unused
|
|
|
1492 */
|
|
|
1493 int prediction_method;
|
|
|
1494 #define FF_PRED_LEFT 0
|
|
|
1495 #define FF_PRED_PLANE 1
|
|
|
1496 #define FF_PRED_MEDIAN 2
|
|
|
1497
|
|
|
1498 /**
|
|
|
1499 * slice offsets in the frame in bytes
|
|
|
1500 * - encoding: Set/allocated by libavcodec.
|
|
|
1501 * - decoding: Set/allocated by user (or NULL).
|
|
|
1502 */
|
|
|
1503 int *slice_offset;
|
|
|
1504
|
|
|
1505 /**
|
|
|
1506 * sample aspect ratio (0 if unknown)
|
|
|
1507 * That is the width of a pixel divided by the height of the pixel.
|
|
|
1508 * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
|
|
|
1509 * - encoding: Set by user.
|
|
|
1510 * - decoding: Set by libavcodec.
|
|
|
1511 */
|
|
|
1512 AVRational sample_aspect_ratio;
|
|
|
1513
|
|
|
1514 /**
|
|
|
1515 * motion estimation comparison function
|
|
|
1516 * - encoding: Set by user.
|
|
|
1517 * - decoding: unused
|
|
|
1518 */
|
|
|
1519 int me_cmp;
|
|
|
1520 /**
|
|
|
1521 * subpixel motion estimation comparison function
|
|
|
1522 * - encoding: Set by user.
|
|
|
1523 * - decoding: unused
|
|
|
1524 */
|
|
|
1525 int me_sub_cmp;
|
|
|
1526 /**
|
|
|
1527 * macroblock comparison function (not supported yet)
|
|
|
1528 * - encoding: Set by user.
|
|
|
1529 * - decoding: unused
|
|
|
1530 */
|
|
|
1531 int mb_cmp;
|
|
|
1532 /**
|
|
|
1533 * interlaced DCT comparison function
|
|
|
1534 * - encoding: Set by user.
|
|
|
1535 * - decoding: unused
|
|
|
1536 */
|
|
|
1537 int ildct_cmp;
|
|
|
1538 #define FF_CMP_SAD 0
|
|
|
1539 #define FF_CMP_SSE 1
|
|
|
1540 #define FF_CMP_SATD 2
|
|
|
1541 #define FF_CMP_DCT 3
|
|
|
1542 #define FF_CMP_PSNR 4
|
|
|
1543 #define FF_CMP_BIT 5
|
|
|
1544 #define FF_CMP_RD 6
|
|
|
1545 #define FF_CMP_ZERO 7
|
|
|
1546 #define FF_CMP_VSAD 8
|
|
|
1547 #define FF_CMP_VSSE 9
|
|
|
1548 #define FF_CMP_NSSE 10
|
|
|
1549 #define FF_CMP_W53 11
|
|
|
1550 #define FF_CMP_W97 12
|
|
|
1551 #define FF_CMP_DCTMAX 13
|
|
|
1552 #define FF_CMP_DCT264 14
|
|
|
1553 #define FF_CMP_CHROMA 256
|
|
|
1554
|
|
|
1555 /**
|
|
|
1556 * ME diamond size & shape
|
|
|
1557 * - encoding: Set by user.
|
|
|
1558 * - decoding: unused
|
|
|
1559 */
|
|
|
1560 int dia_size;
|
|
|
1561
|
|
|
1562 /**
|
|
|
1563 * amount of previous MV predictors (2a+1 x 2a+1 square)
|
|
|
1564 * - encoding: Set by user.
|
|
|
1565 * - decoding: unused
|
|
|
1566 */
|
|
|
1567 int last_predictor_count;
|
|
|
1568
|
|
|
1569 /**
|
|
|
1570 * prepass for motion estimation
|
|
|
1571 * - encoding: Set by user.
|
|
|
1572 * - decoding: unused
|
|
|
1573 */
|
|
|
1574 int pre_me;
|
|
|
1575
|
|
|
1576 /**
|
|
|
1577 * motion estimation prepass comparison function
|
|
|
1578 * - encoding: Set by user.
|
|
|
1579 * - decoding: unused
|
|
|
1580 */
|
|
|
1581 int me_pre_cmp;
|
|
|
1582
|
|
|
1583 /**
|
|
|
1584 * ME prepass diamond size & shape
|
|
|
1585 * - encoding: Set by user.
|
|
|
1586 * - decoding: unused
|
|
|
1587 */
|
|
|
1588 int pre_dia_size;
|
|
|
1589
|
|
|
1590 /**
|
|
|
1591 * subpel ME quality
|
|
|
1592 * - encoding: Set by user.
|
|
|
1593 * - decoding: unused
|
|
|
1594 */
|
|
|
1595 int me_subpel_quality;
|
|
|
1596
|
|
|
1597 /**
|
|
|
1598 * DTG active format information (additional aspect ratio
|
|
|
1599 * information only used in DVB MPEG-2 transport streams)
|
|
|
1600 * 0 if not set.
|
|
|
1601 *
|
|
|
1602 * - encoding: unused
|
|
|
1603 * - decoding: Set by decoder.
|
|
|
1604 */
|
|
|
1605 int dtg_active_format;
|
|
|
1606 #define FF_DTG_AFD_SAME 8
|
|
|
1607 #define FF_DTG_AFD_4_3 9
|
|
|
1608 #define FF_DTG_AFD_16_9 10
|
|
|
1609 #define FF_DTG_AFD_14_9 11
|
|
|
1610 #define FF_DTG_AFD_4_3_SP_14_9 13
|
|
|
1611 #define FF_DTG_AFD_16_9_SP_14_9 14
|
|
|
1612 #define FF_DTG_AFD_SP_4_3 15
|
|
|
1613
|
|
|
1614 /**
|
|
|
1615 * maximum motion estimation search range in subpel units
|
|
|
1616 * If 0 then no limit.
|
|
|
1617 *
|
|
|
1618 * - encoding: Set by user.
|
|
|
1619 * - decoding: unused
|
|
|
1620 */
|
|
|
1621 int me_range;
|
|
|
1622
|
|
|
1623 /**
|
|
|
1624 * intra quantizer bias
|
|
|
1625 * - encoding: Set by user.
|
|
|
1626 * - decoding: unused
|
|
|
1627 */
|
|
|
1628 int intra_quant_bias;
|
|
|
1629 #define FF_DEFAULT_QUANT_BIAS 999999
|
|
|
1630
|
|
|
1631 /**
|
|
|
1632 * inter quantizer bias
|
|
|
1633 * - encoding: Set by user.
|
|
|
1634 * - decoding: unused
|
|
|
1635 */
|
|
|
1636 int inter_quant_bias;
|
|
|
1637
|
|
|
1638 /**
|
|
|
1639 * slice flags
|
|
|
1640 * - encoding: unused
|
|
|
1641 * - decoding: Set by user.
|
|
|
1642 */
|
|
|
1643 int slice_flags;
|
|
|
1644 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
|
|
|
1645 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
|
|
|
1646 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
|
|
|
1647
|
|
|
1648 /**
|
|
|
1649 * XVideo Motion Acceleration
|
|
|
1650 * - encoding: forbidden
|
|
|
1651 * - decoding: set by decoder
|
|
|
1652 */
|
|
|
1653 int xvmc_acceleration;
|
|
|
1654
|
|
|
1655 /**
|
|
|
1656 * macroblock decision mode
|
|
|
1657 * - encoding: Set by user.
|
|
|
1658 * - decoding: unused
|
|
|
1659 */
|
|
|
1660 int mb_decision;
|
|
|
1661 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
|
|
|
1662 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
|
|
|
1663 #define FF_MB_DECISION_RD 2 ///< rate distortion
|
|
|
1664
|
|
|
1665 /**
|
|
|
1666 * custom intra quantization matrix
|
|
|
1667 * - encoding: Set by user, can be NULL.
|
|
|
1668 * - decoding: Set by libavcodec.
|
|
|
1669 */
|
|
|
1670 uint16_t *intra_matrix;
|
|
|
1671
|
|
|
1672 /**
|
|
|
1673 * custom inter quantization matrix
|
|
|
1674 * - encoding: Set by user, can be NULL.
|
|
|
1675 * - decoding: Set by libavcodec.
|
|
|
1676 */
|
|
|
1677 uint16_t *inter_matrix;
|
|
|
1678
|
|
|
1679 /**
|
|
|
1680 * scene change detection threshold
|
|
|
1681 * 0 is default, larger means fewer detected scene changes.
|
|
|
1682 * - encoding: Set by user.
|
|
|
1683 * - decoding: unused
|
|
|
1684 */
|
|
|
1685 int scenechange_threshold;
|
|
|
1686
|
|
|
1687 /**
|
|
|
1688 * noise reduction strength
|
|
|
1689 * - encoding: Set by user.
|
|
|
1690 * - decoding: unused
|
|
|
1691 */
|
|
|
1692 int noise_reduction;
|
|
|
1693
|
|
|
1694 /**
|
|
|
1695 * Motion estimation threshold below which no motion estimation is
|
|
|
1696 * performed, but instead the user specified motion vectors are used.
|
|
|
1697 *
|
|
|
1698 * - encoding: Set by user.
|
|
|
1699 * - decoding: unused
|
|
|
1700 */
|
|
|
1701 int me_threshold;
|
|
|
1702
|
|
|
1703 /**
|
|
|
1704 * Macroblock threshold below which the user specified macroblock types will be used.
|
|
|
1705 * - encoding: Set by user.
|
|
|
1706 * - decoding: unused
|
|
|
1707 */
|
|
|
1708 int mb_threshold;
|
|
|
1709
|
|
|
1710 /**
|
|
|
1711 * precision of the intra DC coefficient - 8
|
|
|
1712 * - encoding: Set by user.
|
|
|
1713 * - decoding: unused
|
|
|
1714 */
|
|
|
1715 int intra_dc_precision;
|
|
|
1716
|
|
|
1717 /**
|
|
|
1718 * Number of macroblock rows at the top which are skipped.
|
|
|
1719 * - encoding: unused
|
|
|
1720 * - decoding: Set by user.
|
|
|
1721 */
|
|
|
1722 int skip_top;
|
|
|
1723
|
|
|
1724 /**
|
|
|
1725 * Number of macroblock rows at the bottom which are skipped.
|
|
|
1726 * - encoding: unused
|
|
|
1727 * - decoding: Set by user.
|
|
|
1728 */
|
|
|
1729 int skip_bottom;
|
|
|
1730
|
|
|
1731 /**
|
|
|
1732 * Border processing masking, raises the quantizer for mbs on the borders
|
|
|
1733 * of the picture.
|
|
|
1734 * - encoding: Set by user.
|
|
|
1735 * - decoding: unused
|
|
|
1736 */
|
|
|
1737 float border_masking;
|
|
|
1738
|
|
|
1739 /**
|
|
|
1740 * minimum MB lagrange multipler
|
|
|
1741 * - encoding: Set by user.
|
|
|
1742 * - decoding: unused
|
|
|
1743 */
|
|
|
1744 int mb_lmin;
|
|
|
1745
|
|
|
1746 /**
|
|
|
1747 * maximum MB lagrange multipler
|
|
|
1748 * - encoding: Set by user.
|
|
|
1749 * - decoding: unused
|
|
|
1750 */
|
|
|
1751 int mb_lmax;
|
|
|
1752
|
|
|
1753 /**
|
|
|
1754 *
|
|
|
1755 * - encoding: Set by user.
|
|
|
1756 * - decoding: unused
|
|
|
1757 */
|
|
|
1758 int me_penalty_compensation;
|
|
|
1759
|
|
|
1760 /**
|
|
|
1761 *
|
|
|
1762 * - encoding: Set by user.
|
|
|
1763 * - decoding: unused
|
|
|
1764 */
|
|
|
1765 int bidir_refine;
|
|
|
1766
|
|
|
1767 /**
|
|
|
1768 *
|
|
|
1769 * - encoding: Set by user.
|
|
|
1770 * - decoding: unused
|
|
|
1771 */
|
|
|
1772 int brd_scale;
|
|
|
1773
|
|
|
1774 /**
|
|
|
1775 * minimum GOP size
|
|
|
1776 * - encoding: Set by user.
|
|
|
1777 * - decoding: unused
|
|
|
1778 */
|
|
|
1779 int keyint_min;
|
|
|
1780
|
|
|
1781 /**
|
|
|
1782 * number of reference frames
|
|
|
1783 * - encoding: Set by user.
|
|
|
1784 * - decoding: Set by lavc.
|
|
|
1785 */
|
|
|
1786 int refs;
|
|
|
1787
|
|
|
1788 /**
|
|
|
1789 * chroma qp offset from luma
|
|
|
1790 * - encoding: Set by user.
|
|
|
1791 * - decoding: unused
|
|
|
1792 */
|
|
|
1793 int chromaoffset;
|
|
|
1794
|
|
|
1795 /**
|
|
|
1796 * Multiplied by qscale for each frame and added to scene_change_score.
|
|
|
1797 * - encoding: Set by user.
|
|
|
1798 * - decoding: unused
|
|
|
1799 */
|
|
|
1800 int scenechange_factor;
|
|
|
1801
|
|
|
1802 /**
|
|
|
1803 *
|
|
|
1804 * Note: Value depends upon the compare function used for fullpel ME.
|
|
|
1805 * - encoding: Set by user.
|
|
|
1806 * - decoding: unused
|
|
|
1807 */
|
|
|
1808 int mv0_threshold;
|
|
|
1809
|
|
|
1810 /**
|
|
|
1811 * Adjust sensitivity of b_frame_strategy 1.
|
|
|
1812 * - encoding: Set by user.
|
|
|
1813 * - decoding: unused
|
|
|
1814 */
|
|
|
1815 int b_sensitivity;
|
|
|
1816
|
|
|
1817 /**
|
|
|
1818 * Chromaticity coordinates of the source primaries.
|
|
|
1819 * - encoding: Set by user
|
|
|
1820 * - decoding: Set by libavcodec
|
|
|
1821 */
|
|
|
1822 enum AVColorPrimaries color_primaries;
|
|
|
1823
|
|
|
1824 /**
|
|
|
1825 * Color Transfer Characteristic.
|
|
|
1826 * - encoding: Set by user
|
|
|
1827 * - decoding: Set by libavcodec
|
|
|
1828 */
|
|
|
1829 enum AVColorTransferCharacteristic color_trc;
|
|
|
1830
|
|
|
1831 /**
|
|
|
1832 * YUV colorspace type.
|
|
|
1833 * - encoding: Set by user
|
|
|
1834 * - decoding: Set by libavcodec
|
|
|
1835 */
|
|
|
1836 enum AVColorSpace colorspace;
|
|
|
1837
|
|
|
1838 /**
|
|
|
1839 * MPEG vs JPEG YUV range.
|
|
|
1840 * - encoding: Set by user
|
|
|
1841 * - decoding: Set by libavcodec
|
|
|
1842 */
|
|
|
1843 enum AVColorRange color_range;
|
|
|
1844
|
|
|
1845 /**
|
|
|
1846 * This defines the location of chroma samples.
|
|
|
1847 * - encoding: Set by user
|
|
|
1848 * - decoding: Set by libavcodec
|
|
|
1849 */
|
|
|
1850 enum AVChromaLocation chroma_sample_location;
|
|
|
1851
|
|
|
1852 /**
|
|
|
1853 * Number of slices.
|
|
|
1854 * Indicates number of picture subdivisions. Used for parallelized
|
|
|
1855 * decoding.
|
|
|
1856 * - encoding: Set by user
|
|
|
1857 * - decoding: unused
|
|
|
1858 */
|
|
|
1859 int slices;
|
|
|
1860
|
|
|
1861 /** Field order
|
|
|
1862 * - encoding: set by libavcodec
|
|
|
1863 * - decoding: Set by user.
|
|
|
1864 */
|
|
|
1865 enum AVFieldOrder field_order;
|
|
|
1866
|
|
|
1867 /* audio only */
|
|
|
1868 int sample_rate; ///< samples per second
|
|
|
1869 int channels; ///< number of audio channels
|
|
|
1870
|
|
|
1871 /**
|
|
|
1872 * audio sample format
|
|
|
1873 * - encoding: Set by user.
|
|
|
1874 * - decoding: Set by libavcodec.
|
|
|
1875 */
|
|
|
1876 enum AVSampleFormat sample_fmt; ///< sample format
|
|
|
1877
|
|
|
1878 /* The following data should not be initialized. */
|
|
|
1879 /**
|
|
|
1880 * Number of samples per channel in an audio frame.
|
|
|
1881 *
|
|
|
1882 * - encoding: set by libavcodec in avcodec_open2(). Each submitted frame
|
|
|
1883 * except the last must contain exactly frame_size samples per channel.
|
|
|
1884 * May be 0 when the codec has CODEC_CAP_VARIABLE_FRAME_SIZE set, then the
|
|
|
1885 * frame size is not restricted.
|
|
|
1886 * - decoding: may be set by some decoders to indicate constant frame size
|
|
|
1887 */
|
|
|
1888 int frame_size;
|
|
|
1889
|
|
|
1890 /**
|
|
|
1891 * Frame counter, set by libavcodec.
|
|
|
1892 *
|
|
|
1893 * - decoding: total number of frames returned from the decoder so far.
|
|
|
1894 * - encoding: total number of frames passed to the encoder so far.
|
|
|
1895 *
|
|
|
1896 * @note the counter is not incremented if encoding/decoding resulted in
|
|
|
1897 * an error.
|
|
|
1898 */
|
|
|
1899 int frame_number;
|
|
|
1900
|
|
|
1901 /**
|
|
|
1902 * number of bytes per packet if constant and known or 0
|
|
|
1903 * Used by some WAV based audio codecs.
|
|
|
1904 */
|
|
|
1905 int block_align;
|
|
|
1906
|
|
|
1907 /**
|
|
|
1908 * Audio cutoff bandwidth (0 means "automatic")
|
|
|
1909 * - encoding: Set by user.
|
|
|
1910 * - decoding: unused
|
|
|
1911 */
|
|
|
1912 int cutoff;
|
|
|
1913
|
|
|
1914 #if FF_API_REQUEST_CHANNELS
|
|
|
1915 /**
|
|
|
1916 * Decoder should decode to this many channels if it can (0 for default)
|
|
|
1917 * - encoding: unused
|
|
|
1918 * - decoding: Set by user.
|
|
|
1919 * @deprecated Deprecated in favor of request_channel_layout.
|
|
|
1920 */
|
|
|
1921 int request_channels;
|
|
|
1922 #endif
|
|
|
1923
|
|
|
1924 /**
|
|
|
1925 * Audio channel layout.
|
|
|
1926 * - encoding: set by user.
|
|
|
1927 * - decoding: set by user, may be overwritten by libavcodec.
|
|
|
1928 */
|
|
|
1929 uint64_t channel_layout;
|
|
|
1930
|
|
|
1931 /**
|
|
|
1932 * Request decoder to use this channel layout if it can (0 for default)
|
|
|
1933 * - encoding: unused
|
|
|
1934 * - decoding: Set by user.
|
|
|
1935 */
|
|
|
1936 uint64_t request_channel_layout;
|
|
|
1937
|
|
|
1938 /**
|
|
|
1939 * Type of service that the audio stream conveys.
|
|
|
1940 * - encoding: Set by user.
|
|
|
1941 * - decoding: Set by libavcodec.
|
|
|
1942 */
|
|
|
1943 enum AVAudioServiceType audio_service_type;
|
|
|
1944
|
|
|
1945 /**
|
|
|
1946 * desired sample format
|
|
|
1947 * - encoding: Not used.
|
|
|
1948 * - decoding: Set by user.
|
|
|
1949 * Decoder will decode to this format if it can.
|
|
|
1950 */
|
|
|
1951 enum AVSampleFormat request_sample_fmt;
|
|
|
1952
|
|
|
1953 #if FF_API_GET_BUFFER
|
|
|
1954 /**
|
|
|
1955 * Called at the beginning of each frame to get a buffer for it.
|
|
|
1956 *
|
|
|
1957 * The function will set AVFrame.data[], AVFrame.linesize[].
|
|
|
1958 * AVFrame.extended_data[] must also be set, but it should be the same as
|
|
|
1959 * AVFrame.data[] except for planar audio with more channels than can fit
|
|
|
1960 * in AVFrame.data[]. In that case, AVFrame.data[] shall still contain as
|
|
|
1961 * many data pointers as it can hold.
|
|
|
1962 *
|
|
|
1963 * if CODEC_CAP_DR1 is not set then get_buffer() must call
|
|
|
1964 * avcodec_default_get_buffer() instead of providing buffers allocated by
|
|
|
1965 * some other means.
|
|
|
1966 *
|
|
|
1967 * AVFrame.data[] should be 32- or 16-byte-aligned unless the CPU doesn't
|
|
|
1968 * need it. avcodec_default_get_buffer() aligns the output buffer properly,
|
|
|
1969 * but if get_buffer() is overridden then alignment considerations should
|
|
|
1970 * be taken into account.
|
|
|
1971 *
|
|
|
1972 * @see avcodec_default_get_buffer()
|
|
|
1973 *
|
|
|
1974 * Video:
|
|
|
1975 *
|
|
|
1976 * If pic.reference is set then the frame will be read later by libavcodec.
|
|
|
1977 * avcodec_align_dimensions2() should be used to find the required width and
|
|
|
1978 * height, as they normally need to be rounded up to the next multiple of 16.
|
|
|
1979 *
|
|
|
1980 * If frame multithreading is used and thread_safe_callbacks is set,
|
|
|
1981 * it may be called from a different thread, but not from more than one at
|
|
|
1982 * once. Does not need to be reentrant.
|
|
|
1983 *
|
|
|
1984 * @see release_buffer(), reget_buffer()
|
|
|
1985 * @see avcodec_align_dimensions2()
|
|
|
1986 *
|
|
|
1987 * Audio:
|
|
|
1988 *
|
|
|
1989 * Decoders request a buffer of a particular size by setting
|
|
|
1990 * AVFrame.nb_samples prior to calling get_buffer(). The decoder may,
|
|
|
1991 * however, utilize only part of the buffer by setting AVFrame.nb_samples
|
|
|
1992 * to a smaller value in the output frame.
|
|
|
1993 *
|
|
|
1994 * Decoders cannot use the buffer after returning from
|
|
|
1995 * avcodec_decode_audio4(), so they will not call release_buffer(), as it
|
|
|
1996 * is assumed to be released immediately upon return. In some rare cases,
|
|
|
1997 * a decoder may need to call get_buffer() more than once in a single
|
|
|
1998 * call to avcodec_decode_audio4(). In that case, when get_buffer() is
|
|
|
1999 * called again after it has already been called once, the previously
|
|
|
2000 * acquired buffer is assumed to be released at that time and may not be
|
|
|
2001 * reused by the decoder.
|
|
|
2002 *
|
|
|
2003 * As a convenience, av_samples_get_buffer_size() and
|
|
|
2004 * av_samples_fill_arrays() in libavutil may be used by custom get_buffer()
|
|
|
2005 * functions to find the required data size and to fill data pointers and
|
|
|
2006 * linesize. In AVFrame.linesize, only linesize[0] may be set for audio
|
|
|
2007 * since all planes must be the same size.
|
|
|
2008 *
|
|
|
2009 * @see av_samples_get_buffer_size(), av_samples_fill_arrays()
|
|
|
2010 *
|
|
|
2011 * - encoding: unused
|
|
|
2012 * - decoding: Set by libavcodec, user can override.
|
|
|
2013 *
|
|
|
2014 * @deprecated use get_buffer2()
|
|
|
2015 */
|
|
|
2016 attribute_deprecated
|
|
|
2017 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
|
|
|
2018
|
|
|
2019 /**
|
|
|
2020 * Called to release buffers which were allocated with get_buffer.
|
|
|
2021 * A released buffer can be reused in get_buffer().
|
|
|
2022 * pic.data[*] must be set to NULL.
|
|
|
2023 * May be called from a different thread if frame multithreading is used,
|
|
|
2024 * but not by more than one thread at once, so does not need to be reentrant.
|
|
|
2025 * - encoding: unused
|
|
|
2026 * - decoding: Set by libavcodec, user can override.
|
|
|
2027 *
|
|
|
2028 * @deprecated custom freeing callbacks should be set from get_buffer2()
|
|
|
2029 */
|
|
|
2030 attribute_deprecated
|
|
|
2031 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
|
|
|
2032
|
|
|
2033 /**
|
|
|
2034 * Called at the beginning of a frame to get cr buffer for it.
|
|
|
2035 * Buffer type (size, hints) must be the same. libavcodec won't check it.
|
|
|
2036 * libavcodec will pass previous buffer in pic, function should return
|
|
|
2037 * same buffer or new buffer with old frame "painted" into it.
|
|
|
2038 * If pic.data[0] == NULL must behave like get_buffer().
|
|
|
2039 * if CODEC_CAP_DR1 is not set then reget_buffer() must call
|
|
|
2040 * avcodec_default_reget_buffer() instead of providing buffers allocated by
|
|
|
2041 * some other means.
|
|
|
2042 * - encoding: unused
|
|
|
2043 * - decoding: Set by libavcodec, user can override.
|
|
|
2044 */
|
|
|
2045 attribute_deprecated
|
|
|
2046 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
|
|
|
2047 #endif
|
|
|
2048
|
|
|
2049 /**
|
|
|
2050 * This callback is called at the beginning of each frame to get data
|
|
|
2051 * buffer(s) for it. There may be one contiguous buffer for all the data or
|
|
|
2052 * there may be a buffer per each data plane or anything in between. What
|
|
|
2053 * this means is, you may set however many entries in buf[] you feel necessary.
|
|
|
2054 * Each buffer must be reference-counted using the AVBuffer API (see description
|
|
|
2055 * of buf[] below).
|
|
|
2056 *
|
|
|
2057 * The following fields will be set in the frame before this callback is
|
|
|
2058 * called:
|
|
|
2059 * - format
|
|
|
2060 * - width, height (video only)
|
|
|
2061 * - sample_rate, channel_layout, nb_samples (audio only)
|
|
|
2062 * Their values may differ from the corresponding values in
|
|
|
2063 * AVCodecContext. This callback must use the frame values, not the codec
|
|
|
2064 * context values, to calculate the required buffer size.
|
|
|
2065 *
|
|
|
2066 * This callback must fill the following fields in the frame:
|
|
|
2067 * - data[]
|
|
|
2068 * - linesize[]
|
|
|
2069 * - extended_data:
|
|
|
2070 * * if the data is planar audio with more than 8 channels, then this
|
|
|
2071 * callback must allocate and fill extended_data to contain all pointers
|
|
|
2072 * to all data planes. data[] must hold as many pointers as it can.
|
|
|
2073 * extended_data must be allocated with av_malloc() and will be freed in
|
|
|
2074 * av_frame_unref().
|
|
|
2075 * * otherwise exended_data must point to data
|
|
|
2076 * - buf[] must contain one or more pointers to AVBufferRef structures. Each of
|
|
|
2077 * the frame's data and extended_data pointers must be contained in these. That
|
|
|
2078 * is, one AVBufferRef for each allocated chunk of memory, not necessarily one
|
|
|
2079 * AVBufferRef per data[] entry. See: av_buffer_create(), av_buffer_alloc(),
|
|
|
2080 * and av_buffer_ref().
|
|
|
2081 * - extended_buf and nb_extended_buf must be allocated with av_malloc() by
|
|
|
2082 * this callback and filled with the extra buffers if there are more
|
|
|
2083 * buffers than buf[] can hold. extended_buf will be freed in
|
|
|
2084 * av_frame_unref().
|
|
|
2085 *
|
|
|
2086 * If CODEC_CAP_DR1 is not set then get_buffer2() must call
|
|
|
2087 * avcodec_default_get_buffer2() instead of providing buffers allocated by
|
|
|
2088 * some other means.
|
|
|
2089 *
|
|
|
2090 * Each data plane must be aligned to the maximum required by the target
|
|
|
2091 * CPU.
|
|
|
2092 *
|
|
|
2093 * @see avcodec_default_get_buffer2()
|
|
|
2094 *
|
|
|
2095 * Video:
|
|
|
2096 *
|
|
|
2097 * If AV_GET_BUFFER_FLAG_REF is set in flags then the frame may be reused
|
|
|
2098 * (read and/or written to if it is writable) later by libavcodec.
|
|
|
2099 *
|
|
|
2100 * If CODEC_FLAG_EMU_EDGE is not set in s->flags, the buffer must contain an
|
|
|
2101 * edge of the size returned by avcodec_get_edge_width() on all sides.
|
|
|
2102 *
|
|
|
2103 * avcodec_align_dimensions2() should be used to find the required width and
|
|
|
2104 * height, as they normally need to be rounded up to the next multiple of 16.
|
|
|
2105 *
|
|
|
2106 * If frame multithreading is used and thread_safe_callbacks is set,
|
|
|
2107 * this callback may be called from a different thread, but not from more
|
|
|
2108 * than one at once. Does not need to be reentrant.
|
|
|
2109 *
|
|
|
2110 * @see avcodec_align_dimensions2()
|
|
|
2111 *
|
|
|
2112 * Audio:
|
|
|
2113 *
|
|
|
2114 * Decoders request a buffer of a particular size by setting
|
|
|
2115 * AVFrame.nb_samples prior to calling get_buffer2(). The decoder may,
|
|
|
2116 * however, utilize only part of the buffer by setting AVFrame.nb_samples
|
|
|
2117 * to a smaller value in the output frame.
|
|
|
2118 *
|
|
|
2119 * As a convenience, av_samples_get_buffer_size() and
|
|
|
2120 * av_samples_fill_arrays() in libavutil may be used by custom get_buffer2()
|
|
|
2121 * functions to find the required data size and to fill data pointers and
|
|
|
2122 * linesize. In AVFrame.linesize, only linesize[0] may be set for audio
|
|
|
2123 * since all planes must be the same size.
|
|
|
2124 *
|
|
|
2125 * @see av_samples_get_buffer_size(), av_samples_fill_arrays()
|
|
|
2126 *
|
|
|
2127 * - encoding: unused
|
|
|
2128 * - decoding: Set by libavcodec, user can override.
|
|
|
2129 */
|
|
|
2130 int (*get_buffer2)(struct AVCodecContext *s, AVFrame *frame, int flags);
|
|
|
2131
|
|
|
2132 /**
|
|
|
2133 * If non-zero, the decoded audio and video frames returned from
|
|
|
2134 * avcodec_decode_video2() and avcodec_decode_audio4() are reference-counted
|
|
|
2135 * and are valid indefinitely. The caller must free them with
|
|
|
2136 * av_frame_unref() when they are not needed anymore.
|
|
|
2137 * Otherwise, the decoded frames must not be freed by the caller and are
|
|
|
2138 * only valid until the next decode call.
|
|
|
2139 *
|
|
|
2140 * - encoding: unused
|
|
|
2141 * - decoding: set by the caller before avcodec_open2().
|
|
|
2142 */
|
|
|
2143 int refcounted_frames;
|
|
|
2144
|
|
|
2145 /* - encoding parameters */
|
|
|
2146 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
|
|
|
2147 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
|
|
|
2148
|
|
|
2149 /**
|
|
|
2150 * minimum quantizer
|
|
|
2151 * - encoding: Set by user.
|
|
|
2152 * - decoding: unused
|
|
|
2153 */
|
|
|
2154 int qmin;
|
|
|
2155
|
|
|
2156 /**
|
|
|
2157 * maximum quantizer
|
|
|
2158 * - encoding: Set by user.
|
|
|
2159 * - decoding: unused
|
|
|
2160 */
|
|
|
2161 int qmax;
|
|
|
2162
|
|
|
2163 /**
|
|
|
2164 * maximum quantizer difference between frames
|
|
|
2165 * - encoding: Set by user.
|
|
|
2166 * - decoding: unused
|
|
|
2167 */
|
|
|
2168 int max_qdiff;
|
|
|
2169
|
|
|
2170 /**
|
|
|
2171 * ratecontrol qmin qmax limiting method
|
|
|
2172 * 0-> clipping, 1-> use a nice continuous function to limit qscale wthin qmin/qmax.
|
|
|
2173 * - encoding: Set by user.
|
|
|
2174 * - decoding: unused
|
|
|
2175 */
|
|
|
2176 float rc_qsquish;
|
|
|
2177
|
|
|
2178 float rc_qmod_amp;
|
|
|
2179 int rc_qmod_freq;
|
|
|
2180
|
|
|
2181 /**
|
|
|
2182 * decoder bitstream buffer size
|
|
|
2183 * - encoding: Set by user.
|
|
|
2184 * - decoding: unused
|
|
|
2185 */
|
|
|
2186 int rc_buffer_size;
|
|
|
2187
|
|
|
2188 /**
|
|
|
2189 * ratecontrol override, see RcOverride
|
|
|
2190 * - encoding: Allocated/set/freed by user.
|
|
|
2191 * - decoding: unused
|
|
|
2192 */
|
|
|
2193 int rc_override_count;
|
|
|
2194 RcOverride *rc_override;
|
|
|
2195
|
|
|
2196 /**
|
|
|
2197 * rate control equation
|
|
|
2198 * - encoding: Set by user
|
|
|
2199 * - decoding: unused
|
|
|
2200 */
|
|
|
2201 const char *rc_eq;
|
|
|
2202
|
|
|
2203 /**
|
|
|
2204 * maximum bitrate
|
|
|
2205 * - encoding: Set by user.
|
|
|
2206 * - decoding: unused
|
|
|
2207 */
|
|
|
2208 int rc_max_rate;
|
|
|
2209
|
|
|
2210 /**
|
|
|
2211 * minimum bitrate
|
|
|
2212 * - encoding: Set by user.
|
|
|
2213 * - decoding: unused
|
|
|
2214 */
|
|
|
2215 int rc_min_rate;
|
|
|
2216
|
|
|
2217 float rc_buffer_aggressivity;
|
|
|
2218
|
|
|
2219 /**
|
|
|
2220 * initial complexity for pass1 ratecontrol
|
|
|
2221 * - encoding: Set by user.
|
|
|
2222 * - decoding: unused
|
|
|
2223 */
|
|
|
2224 float rc_initial_cplx;
|
|
|
2225
|
|
|
2226 /**
|
|
|
2227 * Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow.
|
|
|
2228 * - encoding: Set by user.
|
|
|
2229 * - decoding: unused.
|
|
|
2230 */
|
|
|
2231 float rc_max_available_vbv_use;
|
|
|
2232
|
|
|
2233 /**
|
|
|
2234 * Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow.
|
|
|
2235 * - encoding: Set by user.
|
|
|
2236 * - decoding: unused.
|
|
|
2237 */
|
|
|
2238 float rc_min_vbv_overflow_use;
|
|
|
2239
|
|
|
2240 /**
|
|
|
2241 * Number of bits which should be loaded into the rc buffer before decoding starts.
|
|
|
2242 * - encoding: Set by user.
|
|
|
2243 * - decoding: unused
|
|
|
2244 */
|
|
|
2245 int rc_initial_buffer_occupancy;
|
|
|
2246
|
|
|
2247 #define FF_CODER_TYPE_VLC 0
|
|
|
2248 #define FF_CODER_TYPE_AC 1
|
|
|
2249 #define FF_CODER_TYPE_RAW 2
|
|
|
2250 #define FF_CODER_TYPE_RLE 3
|
|
|
2251 #define FF_CODER_TYPE_DEFLATE 4
|
|
|
2252 /**
|
|
|
2253 * coder type
|
|
|
2254 * - encoding: Set by user.
|
|
|
2255 * - decoding: unused
|
|
|
2256 */
|
|
|
2257 int coder_type;
|
|
|
2258
|
|
|
2259 /**
|
|
|
2260 * context model
|
|
|
2261 * - encoding: Set by user.
|
|
|
2262 * - decoding: unused
|
|
|
2263 */
|
|
|
2264 int context_model;
|
|
|
2265
|
|
|
2266 /**
|
|
|
2267 * minimum Lagrange multipler
|
|
|
2268 * - encoding: Set by user.
|
|
|
2269 * - decoding: unused
|
|
|
2270 */
|
|
|
2271 int lmin;
|
|
|
2272
|
|
|
2273 /**
|
|
|
2274 * maximum Lagrange multipler
|
|
|
2275 * - encoding: Set by user.
|
|
|
2276 * - decoding: unused
|
|
|
2277 */
|
|
|
2278 int lmax;
|
|
|
2279
|
|
|
2280 /**
|
|
|
2281 * frame skip threshold
|
|
|
2282 * - encoding: Set by user.
|
|
|
2283 * - decoding: unused
|
|
|
2284 */
|
|
|
2285 int frame_skip_threshold;
|
|
|
2286
|
|
|
2287 /**
|
|
|
2288 * frame skip factor
|
|
|
2289 * - encoding: Set by user.
|
|
|
2290 * - decoding: unused
|
|
|
2291 */
|
|
|
2292 int frame_skip_factor;
|
|
|
2293
|
|
|
2294 /**
|
|
|
2295 * frame skip exponent
|
|
|
2296 * - encoding: Set by user.
|
|
|
2297 * - decoding: unused
|
|
|
2298 */
|
|
|
2299 int frame_skip_exp;
|
|
|
2300
|
|
|
2301 /**
|
|
|
2302 * frame skip comparison function
|
|
|
2303 * - encoding: Set by user.
|
|
|
2304 * - decoding: unused
|
|
|
2305 */
|
|
|
2306 int frame_skip_cmp;
|
|
|
2307
|
|
|
2308 /**
|
|
|
2309 * trellis RD quantization
|
|
|
2310 * - encoding: Set by user.
|
|
|
2311 * - decoding: unused
|
|
|
2312 */
|
|
|
2313 int trellis;
|
|
|
2314
|
|
|
2315 /**
|
|
|
2316 * - encoding: Set by user.
|
|
|
2317 * - decoding: unused
|
|
|
2318 */
|
|
|
2319 int min_prediction_order;
|
|
|
2320
|
|
|
2321 /**
|
|
|
2322 * - encoding: Set by user.
|
|
|
2323 * - decoding: unused
|
|
|
2324 */
|
|
|
2325 int max_prediction_order;
|
|
|
2326
|
|
|
2327 /**
|
|
|
2328 * GOP timecode frame start number
|
|
|
2329 * - encoding: Set by user, in non drop frame format
|
|
|
2330 * - decoding: Set by libavcodec (timecode in the 25 bits format, -1 if unset)
|
|
|
2331 */
|
|
|
2332 int64_t timecode_frame_start;
|
|
|
2333
|
|
|
2334 /* The RTP callback: This function is called */
|
|
|
2335 /* every time the encoder has a packet to send. */
|
|
|
2336 /* It depends on the encoder if the data starts */
|
|
|
2337 /* with a Start Code (it should). H.263 does. */
|
|
|
2338 /* mb_nb contains the number of macroblocks */
|
|
|
2339 /* encoded in the RTP payload. */
|
|
|
2340 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
|
|
|
2341
|
|
|
2342 int rtp_payload_size; /* The size of the RTP payload: the coder will */
|
|
|
2343 /* do its best to deliver a chunk with size */
|
|
|
2344 /* below rtp_payload_size, the chunk will start */
|
|
|
2345 /* with a start code on some codecs like H.263. */
|
|
|
2346 /* This doesn't take account of any particular */
|
|
|
2347 /* headers inside the transmitted RTP payload. */
|
|
|
2348
|
|
|
2349 /* statistics, used for 2-pass encoding */
|
|
|
2350 int mv_bits;
|
|
|
2351 int header_bits;
|
|
|
2352 int i_tex_bits;
|
|
|
2353 int p_tex_bits;
|
|
|
2354 int i_count;
|
|
|
2355 int p_count;
|
|
|
2356 int skip_count;
|
|
|
2357 int misc_bits;
|
|
|
2358
|
|
|
2359 /**
|
|
|
2360 * number of bits used for the previously encoded frame
|
|
|
2361 * - encoding: Set by libavcodec.
|
|
|
2362 * - decoding: unused
|
|
|
2363 */
|
|
|
2364 int frame_bits;
|
|
|
2365
|
|
|
2366 /**
|
|
|
2367 * pass1 encoding statistics output buffer
|
|
|
2368 * - encoding: Set by libavcodec.
|
|
|
2369 * - decoding: unused
|
|
|
2370 */
|
|
|
2371 char *stats_out;
|
|
|
2372
|
|
|
2373 /**
|
|
|
2374 * pass2 encoding statistics input buffer
|
|
|
2375 * Concatenated stuff from stats_out of pass1 should be placed here.
|
|
|
2376 * - encoding: Allocated/set/freed by user.
|
|
|
2377 * - decoding: unused
|
|
|
2378 */
|
|
|
2379 char *stats_in;
|
|
|
2380
|
|
|
2381 /**
|
|
|
2382 * Work around bugs in encoders which sometimes cannot be detected automatically.
|
|
|
2383 * - encoding: Set by user
|
|
|
2384 * - decoding: Set by user
|
|
|
2385 */
|
|
|
2386 int workaround_bugs;
|
|
|
2387 #define FF_BUG_AUTODETECT 1 ///< autodetection
|
|
|
2388 #define FF_BUG_OLD_MSMPEG4 2
|
|
|
2389 #define FF_BUG_XVID_ILACE 4
|
|
|
2390 #define FF_BUG_UMP4 8
|
|
|
2391 #define FF_BUG_NO_PADDING 16
|
|
|
2392 #define FF_BUG_AMV 32
|
|
|
2393 #define FF_BUG_AC_VLC 0 ///< Will be removed, libavcodec can now handle these non-compliant files by default.
|
|
|
2394 #define FF_BUG_QPEL_CHROMA 64
|
|
|
2395 #define FF_BUG_STD_QPEL 128
|
|
|
2396 #define FF_BUG_QPEL_CHROMA2 256
|
|
|
2397 #define FF_BUG_DIRECT_BLOCKSIZE 512
|
|
|
2398 #define FF_BUG_EDGE 1024
|
|
|
2399 #define FF_BUG_HPEL_CHROMA 2048
|
|
|
2400 #define FF_BUG_DC_CLIP 4096
|
|
|
2401 #define FF_BUG_MS 8192 ///< Work around various bugs in Microsoft's broken decoders.
|
|
|
2402 #define FF_BUG_TRUNCATED 16384
|
|
|
2403
|
|
|
2404 /**
|
|
|
2405 * strictly follow the standard (MPEG4, ...).
|
|
|
2406 * - encoding: Set by user.
|
|
|
2407 * - decoding: Set by user.
|
|
|
2408 * Setting this to STRICT or higher means the encoder and decoder will
|
|
|
2409 * generally do stupid things, whereas setting it to unofficial or lower
|
|
|
2410 * will mean the encoder might produce output that is not supported by all
|
|
|
2411 * spec-compliant decoders. Decoders don't differentiate between normal,
|
|
|
2412 * unofficial and experimental (that is, they always try to decode things
|
|
|
2413 * when they can) unless they are explicitly asked to behave stupidly
|
|
|
2414 * (=strictly conform to the specs)
|
|
|
2415 */
|
|
|
2416 int strict_std_compliance;
|
|
|
2417 #define FF_COMPLIANCE_VERY_STRICT 2 ///< Strictly conform to an older more strict version of the spec or reference software.
|
|
|
2418 #define FF_COMPLIANCE_STRICT 1 ///< Strictly conform to all the things in the spec no matter what consequences.
|
|
|
2419 #define FF_COMPLIANCE_NORMAL 0
|
|
|
2420 #define FF_COMPLIANCE_UNOFFICIAL -1 ///< Allow unofficial extensions
|
|
|
2421 #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
|
|
|
2422
|
|
|
2423 /**
|
|
|
2424 * error concealment flags
|
|
|
2425 * - encoding: unused
|
|
|
2426 * - decoding: Set by user.
|
|
|
2427 */
|
|
|
2428 int error_concealment;
|
|
|
2429 #define FF_EC_GUESS_MVS 1
|
|
|
2430 #define FF_EC_DEBLOCK 2
|
|
|
2431
|
|
|
2432 /**
|
|
|
2433 * debug
|
|
|
2434 * - encoding: Set by user.
|
|
|
2435 * - decoding: Set by user.
|
|
|
2436 */
|
|
|
2437 int debug;
|
|
|
2438 #define FF_DEBUG_PICT_INFO 1
|
|
|
2439 #define FF_DEBUG_RC 2
|
|
|
2440 #define FF_DEBUG_BITSTREAM 4
|
|
|
2441 #define FF_DEBUG_MB_TYPE 8
|
|
|
2442 #define FF_DEBUG_QP 16
|
|
|
2443 #define FF_DEBUG_MV 32
|
|
|
2444 #define FF_DEBUG_DCT_COEFF 0x00000040
|
|
|
2445 #define FF_DEBUG_SKIP 0x00000080
|
|
|
2446 #define FF_DEBUG_STARTCODE 0x00000100
|
|
|
2447 #define FF_DEBUG_PTS 0x00000200
|
|
|
2448 #define FF_DEBUG_ER 0x00000400
|
|
|
2449 #define FF_DEBUG_MMCO 0x00000800
|
|
|
2450 #define FF_DEBUG_BUGS 0x00001000
|
|
|
2451 #define FF_DEBUG_VIS_QP 0x00002000
|
|
|
2452 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
|
|
|
2453 #define FF_DEBUG_BUFFERS 0x00008000
|
|
|
2454 #define FF_DEBUG_THREADS 0x00010000
|
|
|
2455
|
|
|
2456 /**
|
|
|
2457 * debug
|
|
|
2458 * - encoding: Set by user.
|
|
|
2459 * - decoding: Set by user.
|
|
|
2460 */
|
|
|
2461 int debug_mv;
|
|
|
2462 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
|
|
|
2463 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
|
|
|
2464 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
|
|
|
2465
|
|
|
2466 /**
|
|
|
2467 * Error recognition; may misdetect some more or less valid parts as errors.
|
|
|
2468 * - encoding: unused
|
|
|
2469 * - decoding: Set by user.
|
|
|
2470 */
|
|
|
2471 int err_recognition;
|
|
|
2472 #define AV_EF_CRCCHECK (1<<0)
|
|
|
2473 #define AV_EF_BITSTREAM (1<<1)
|
|
|
2474 #define AV_EF_BUFFER (1<<2)
|
|
|
2475 #define AV_EF_EXPLODE (1<<3)
|
|
|
2476
|
|
|
2477 #define AV_EF_CAREFUL (1<<16)
|
|
|
2478 #define AV_EF_COMPLIANT (1<<17)
|
|
|
2479 #define AV_EF_AGGRESSIVE (1<<18)
|
|
|
2480
|
|
|
2481
|
|
|
2482 /**
|
|
|
2483 * opaque 64bit number (generally a PTS) that will be reordered and
|
|
|
2484 * output in AVFrame.reordered_opaque
|
|
|
2485 * @deprecated in favor of pkt_pts
|
|
|
2486 * - encoding: unused
|
|
|
2487 * - decoding: Set by user.
|
|
|
2488 */
|
|
|
2489 int64_t reordered_opaque;
|
|
|
2490
|
|
|
2491 /**
|
|
|
2492 * Hardware accelerator in use
|
|
|
2493 * - encoding: unused.
|
|
|
2494 * - decoding: Set by libavcodec
|
|
|
2495 */
|
|
|
2496 struct AVHWAccel *hwaccel;
|
|
|
2497
|
|
|
2498 /**
|
|
|
2499 * Hardware accelerator context.
|
|
|
2500 * For some hardware accelerators, a global context needs to be
|
|
|
2501 * provided by the user. In that case, this holds display-dependent
|
|
|
2502 * data FFmpeg cannot instantiate itself. Please refer to the
|
|
|
2503 * FFmpeg HW accelerator documentation to know how to fill this
|
|
|
2504 * is. e.g. for VA API, this is a struct vaapi_context.
|
|
|
2505 * - encoding: unused
|
|
|
2506 * - decoding: Set by user
|
|
|
2507 */
|
|
|
2508 void *hwaccel_context;
|
|
|
2509
|
|
|
2510 /**
|
|
|
2511 * error
|
|
|
2512 * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
|
|
|
2513 * - decoding: unused
|
|
|
2514 */
|
|
|
2515 uint64_t error[AV_NUM_DATA_POINTERS];
|
|
|
2516
|
|
|
2517 /**
|
|
|
2518 * DCT algorithm, see FF_DCT_* below
|
|
|
2519 * - encoding: Set by user.
|
|
|
2520 * - decoding: unused
|
|
|
2521 */
|
|
|
2522 int dct_algo;
|
|
|
2523 #define FF_DCT_AUTO 0
|
|
|
2524 #define FF_DCT_FASTINT 1
|
|
|
2525 #define FF_DCT_INT 2
|
|
|
2526 #define FF_DCT_MMX 3
|
|
|
2527 #define FF_DCT_ALTIVEC 5
|
|
|
2528 #define FF_DCT_FAAN 6
|
|
|
2529
|
|
|
2530 /**
|
|
|
2531 * IDCT algorithm, see FF_IDCT_* below.
|
|
|
2532 * - encoding: Set by user.
|
|
|
2533 * - decoding: Set by user.
|
|
|
2534 */
|
|
|
2535 int idct_algo;
|
|
|
2536 #define FF_IDCT_AUTO 0
|
|
|
2537 #define FF_IDCT_INT 1
|
|
|
2538 #define FF_IDCT_SIMPLE 2
|
|
|
2539 #define FF_IDCT_SIMPLEMMX 3
|
|
|
2540 #define FF_IDCT_ARM 7
|
|
|
2541 #define FF_IDCT_ALTIVEC 8
|
|
|
2542 #define FF_IDCT_SH4 9
|
|
|
2543 #define FF_IDCT_SIMPLEARM 10
|
|
|
2544 #define FF_IDCT_IPP 13
|
|
|
2545 #define FF_IDCT_XVIDMMX 14
|
|
|
2546 #define FF_IDCT_SIMPLEARMV5TE 16
|
|
|
2547 #define FF_IDCT_SIMPLEARMV6 17
|
|
|
2548 #define FF_IDCT_SIMPLEVIS 18
|
|
|
2549 #define FF_IDCT_FAAN 20
|
|
|
2550 #define FF_IDCT_SIMPLENEON 22
|
|
|
2551 #define FF_IDCT_SIMPLEALPHA 23
|
|
|
2552
|
|
|
2553 /**
|
|
|
2554 * bits per sample/pixel from the demuxer (needed for huffyuv).
|
|
|
2555 * - encoding: Set by libavcodec.
|
|
|
2556 * - decoding: Set by user.
|
|
|
2557 */
|
|
|
2558 int bits_per_coded_sample;
|
|
|
2559
|
|
|
2560 /**
|
|
|
2561 * Bits per sample/pixel of internal libavcodec pixel/sample format.
|
|
|
2562 * - encoding: set by user.
|
|
|
2563 * - decoding: set by libavcodec.
|
|
|
2564 */
|
|
|
2565 int bits_per_raw_sample;
|
|
|
2566
|
|
|
2567 #if FF_API_LOWRES
|
|
|
2568 /**
|
|
|
2569 * low resolution decoding, 1-> 1/2 size, 2->1/4 size
|
|
|
2570 * - encoding: unused
|
|
|
2571 * - decoding: Set by user.
|
|
|
2572 * Code outside libavcodec should access this field using:
|
|
|
2573 * av_codec_{get,set}_lowres(avctx)
|
|
|
2574 */
|
|
|
2575 int lowres;
|
|
|
2576 #endif
|
|
|
2577
|
|
|
2578 /**
|
|
|
2579 * the picture in the bitstream
|
|
|
2580 * - encoding: Set by libavcodec.
|
|
|
2581 * - decoding: Set by libavcodec.
|
|
|
2582 */
|
|
|
2583 AVFrame *coded_frame;
|
|
|
2584
|
|
|
2585 /**
|
|
|
2586 * thread count
|
|
|
2587 * is used to decide how many independent tasks should be passed to execute()
|
|
|
2588 * - encoding: Set by user.
|
|
|
2589 * - decoding: Set by user.
|
|
|
2590 */
|
|
|
2591 int thread_count;
|
|
|
2592
|
|
|
2593 /**
|
|
|
2594 * Which multithreading methods to use.
|
|
|
2595 * Use of FF_THREAD_FRAME will increase decoding delay by one frame per thread,
|
|
|
2596 * so clients which cannot provide future frames should not use it.
|
|
|
2597 *
|
|
|
2598 * - encoding: Set by user, otherwise the default is used.
|
|
|
2599 * - decoding: Set by user, otherwise the default is used.
|
|
|
2600 */
|
|
|
2601 int thread_type;
|
|
|
2602 #define FF_THREAD_FRAME 1 ///< Decode more than one frame at once
|
|
|
2603 #define FF_THREAD_SLICE 2 ///< Decode more than one part of a single frame at once
|
|
|
2604
|
|
|
2605 /**
|
|
|
2606 * Which multithreading methods are in use by the codec.
|
|
|
2607 * - encoding: Set by libavcodec.
|
|
|
2608 * - decoding: Set by libavcodec.
|
|
|
2609 */
|
|
|
2610 int active_thread_type;
|
|
|
2611
|
|
|
2612 /**
|
|
|
2613 * Set by the client if its custom get_buffer() callback can be called
|
|
|
2614 * synchronously from another thread, which allows faster multithreaded decoding.
|
|
|
2615 * draw_horiz_band() will be called from other threads regardless of this setting.
|
|
|
2616 * Ignored if the default get_buffer() is used.
|
|
|
2617 * - encoding: Set by user.
|
|
|
2618 * - decoding: Set by user.
|
|
|
2619 */
|
|
|
2620 int thread_safe_callbacks;
|
|
|
2621
|
|
|
2622 /**
|
|
|
2623 * The codec may call this to execute several independent things.
|
|
|
2624 * It will return only after finishing all tasks.
|
|
|
2625 * The user may replace this with some multithreaded implementation,
|
|
|
2626 * the default implementation will execute the parts serially.
|
|
|
2627 * @param count the number of things to execute
|
|
|
2628 * - encoding: Set by libavcodec, user can override.
|
|
|
2629 * - decoding: Set by libavcodec, user can override.
|
|
|
2630 */
|
|
|
2631 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size);
|
|
|
2632
|
|
|
2633 /**
|
|
|
2634 * The codec may call this to execute several independent things.
|
|
|
2635 * It will return only after finishing all tasks.
|
|
|
2636 * The user may replace this with some multithreaded implementation,
|
|
|
2637 * the default implementation will execute the parts serially.
|
|
|
2638 * Also see avcodec_thread_init and e.g. the --enable-pthread configure option.
|
|
|
2639 * @param c context passed also to func
|
|
|
2640 * @param count the number of things to execute
|
|
|
2641 * @param arg2 argument passed unchanged to func
|
|
|
2642 * @param ret return values of executed functions, must have space for "count" values. May be NULL.
|
|
|
2643 * @param func function that will be called count times, with jobnr from 0 to count-1.
|
|
|
2644 * threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no
|
|
|
2645 * two instances of func executing at the same time will have the same threadnr.
|
|
|
2646 * @return always 0 currently, but code should handle a future improvement where when any call to func
|
|
|
2647 * returns < 0 no further calls to func may be done and < 0 is returned.
|
|
|
2648 * - encoding: Set by libavcodec, user can override.
|
|
|
2649 * - decoding: Set by libavcodec, user can override.
|
|
|
2650 */
|
|
|
2651 int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count);
|
|
|
2652
|
|
|
2653 /**
|
|
|
2654 * thread opaque
|
|
|
2655 * Can be used by execute() to store some per AVCodecContext stuff.
|
|
|
2656 * - encoding: set by execute()
|
|
|
2657 * - decoding: set by execute()
|
|
|
2658 */
|
|
|
2659 void *thread_opaque;
|
|
|
2660
|
|
|
2661 /**
|
|
|
2662 * noise vs. sse weight for the nsse comparsion function
|
|
|
2663 * - encoding: Set by user.
|
|
|
2664 * - decoding: unused
|
|
|
2665 */
|
|
|
2666 int nsse_weight;
|
|
|
2667
|
|
|
2668 /**
|
|
|
2669 * profile
|
|
|
2670 * - encoding: Set by user.
|
|
|
2671 * - decoding: Set by libavcodec.
|
|
|
2672 */
|
|
|
2673 int profile;
|
|
|
2674 #define FF_PROFILE_UNKNOWN -99
|
|
|
2675 #define FF_PROFILE_RESERVED -100
|
|
|
2676
|
|
|
2677 #define FF_PROFILE_AAC_MAIN 0
|
|
|
2678 #define FF_PROFILE_AAC_LOW 1
|
|
|
2679 #define FF_PROFILE_AAC_SSR 2
|
|
|
2680 #define FF_PROFILE_AAC_LTP 3
|
|
|
2681 #define FF_PROFILE_AAC_HE 4
|
|
|
2682 #define FF_PROFILE_AAC_HE_V2 28
|
|
|
2683 #define FF_PROFILE_AAC_LD 22
|
|
|
2684 #define FF_PROFILE_AAC_ELD 38
|
|
|
2685
|
|
|
2686 #define FF_PROFILE_DTS 20
|
|
|
2687 #define FF_PROFILE_DTS_ES 30
|
|
|
2688 #define FF_PROFILE_DTS_96_24 40
|
|
|
2689 #define FF_PROFILE_DTS_HD_HRA 50
|
|
|
2690 #define FF_PROFILE_DTS_HD_MA 60
|
|
|
2691
|
|
|
2692 #define FF_PROFILE_MPEG2_422 0
|
|
|
2693 #define FF_PROFILE_MPEG2_HIGH 1
|
|
|
2694 #define FF_PROFILE_MPEG2_SS 2
|
|
|
2695 #define FF_PROFILE_MPEG2_SNR_SCALABLE 3
|
|
|
2696 #define FF_PROFILE_MPEG2_MAIN 4
|
|
|
2697 #define FF_PROFILE_MPEG2_SIMPLE 5
|
|
|
2698
|
|
|
2699 #define FF_PROFILE_H264_CONSTRAINED (1<<9) // 8+1; constraint_set1_flag
|
|
|
2700 #define FF_PROFILE_H264_INTRA (1<<11) // 8+3; constraint_set3_flag
|
|
|
2701
|
|
|
2702 #define FF_PROFILE_H264_BASELINE 66
|
|
|
2703 #define FF_PROFILE_H264_CONSTRAINED_BASELINE (66|FF_PROFILE_H264_CONSTRAINED)
|
|
|
2704 #define FF_PROFILE_H264_MAIN 77
|
|
|
2705 #define FF_PROFILE_H264_EXTENDED 88
|
|
|
2706 #define FF_PROFILE_H264_HIGH 100
|
|
|
2707 #define FF_PROFILE_H264_HIGH_10 110
|
|
|
2708 #define FF_PROFILE_H264_HIGH_10_INTRA (110|FF_PROFILE_H264_INTRA)
|
|
|
2709 #define FF_PROFILE_H264_HIGH_422 122
|
|
|
2710 #define FF_PROFILE_H264_HIGH_422_INTRA (122|FF_PROFILE_H264_INTRA)
|
|
|
2711 #define FF_PROFILE_H264_HIGH_444 144
|
|
|
2712 #define FF_PROFILE_H264_HIGH_444_PREDICTIVE 244
|
|
|
2713 #define FF_PROFILE_H264_HIGH_444_INTRA (244|FF_PROFILE_H264_INTRA)
|
|
|
2714 #define FF_PROFILE_H264_CAVLC_444 44
|
|
|
2715
|
|
|
2716 #define FF_PROFILE_VC1_SIMPLE 0
|
|
|
2717 #define FF_PROFILE_VC1_MAIN 1
|
|
|
2718 #define FF_PROFILE_VC1_COMPLEX 2
|
|
|
2719 #define FF_PROFILE_VC1_ADVANCED 3
|
|
|
2720
|
|
|
2721 #define FF_PROFILE_MPEG4_SIMPLE 0
|
|
|
2722 #define FF_PROFILE_MPEG4_SIMPLE_SCALABLE 1
|
|
|
2723 #define FF_PROFILE_MPEG4_CORE 2
|
|
|
2724 #define FF_PROFILE_MPEG4_MAIN 3
|
|
|
2725 #define FF_PROFILE_MPEG4_N_BIT 4
|
|
|
2726 #define FF_PROFILE_MPEG4_SCALABLE_TEXTURE 5
|
|
|
2727 #define FF_PROFILE_MPEG4_SIMPLE_FACE_ANIMATION 6
|
|
|
2728 #define FF_PROFILE_MPEG4_BASIC_ANIMATED_TEXTURE 7
|
|
|
2729 #define FF_PROFILE_MPEG4_HYBRID 8
|
|
|
2730 #define FF_PROFILE_MPEG4_ADVANCED_REAL_TIME 9
|
|
|
2731 #define FF_PROFILE_MPEG4_CORE_SCALABLE 10
|
|
|
2732 #define FF_PROFILE_MPEG4_ADVANCED_CODING 11
|
|
|
2733 #define FF_PROFILE_MPEG4_ADVANCED_CORE 12
|
|
|
2734 #define FF_PROFILE_MPEG4_ADVANCED_SCALABLE_TEXTURE 13
|
|
|
2735 #define FF_PROFILE_MPEG4_SIMPLE_STUDIO 14
|
|
|
2736 #define FF_PROFILE_MPEG4_ADVANCED_SIMPLE 15
|
|
|
2737
|
|
|
2738 #define FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_0 0
|
|
|
2739 #define FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_1 1
|
|
|
2740 #define FF_PROFILE_JPEG2000_CSTREAM_NO_RESTRICTION 2
|
|
|
2741 #define FF_PROFILE_JPEG2000_DCINEMA_2K 3
|
|
|
2742 #define FF_PROFILE_JPEG2000_DCINEMA_4K 4
|
|
|
2743
|
|
|
2744 /**
|
|
|
2745 * level
|
|
|
2746 * - encoding: Set by user.
|
|
|
2747 * - decoding: Set by libavcodec.
|
|
|
2748 */
|
|
|
2749 int level;
|
|
|
2750 #define FF_LEVEL_UNKNOWN -99
|
|
|
2751
|
|
|
2752 /**
|
|
|
2753 * Skip loop filtering for selected frames.
|
|
|
2754 * - encoding: unused
|
|
|
2755 * - decoding: Set by user.
|
|
|
2756 */
|
|
|
2757 enum AVDiscard skip_loop_filter;
|
|
|
2758
|
|
|
2759 /**
|
|
|
2760 * Skip IDCT/dequantization for selected frames.
|
|
|
2761 * - encoding: unused
|
|
|
2762 * - decoding: Set by user.
|
|
|
2763 */
|
|
|
2764 enum AVDiscard skip_idct;
|
|
|
2765
|
|
|
2766 /**
|
|
|
2767 * Skip decoding for selected frames.
|
|
|
2768 * - encoding: unused
|
|
|
2769 * - decoding: Set by user.
|
|
|
2770 */
|
|
|
2771 enum AVDiscard skip_frame;
|
|
|
2772
|
|
|
2773 /**
|
|
|
2774 * Header containing style information for text subtitles.
|
|
|
2775 * For SUBTITLE_ASS subtitle type, it should contain the whole ASS
|
|
|
2776 * [Script Info] and [V4+ Styles] section, plus the [Events] line and
|
|
|
2777 * the Format line following. It shouldn't include any Dialogue line.
|
|
|
2778 * - encoding: Set/allocated/freed by user (before avcodec_open2())
|
|
|
2779 * - decoding: Set/allocated/freed by libavcodec (by avcodec_open2())
|
|
|
2780 */
|
|
|
2781 uint8_t *subtitle_header;
|
|
|
2782 int subtitle_header_size;
|
|
|
2783
|
|
|
2784 /**
|
|
|
2785 * Simulates errors in the bitstream to test error concealment.
|
|
|
2786 * - encoding: Set by user.
|
|
|
2787 * - decoding: unused
|
|
|
2788 */
|
|
|
2789 int error_rate;
|
|
|
2790
|
|
|
2791 /**
|
|
|
2792 * Current packet as passed into the decoder, to avoid having
|
|
|
2793 * to pass the packet into every function. Currently only valid
|
|
|
2794 * inside lavc and get/release_buffer callbacks.
|
|
|
2795 * - decoding: set by avcodec_decode_*, read by get_buffer() for setting pkt_pts
|
|
|
2796 * - encoding: unused
|
|
|
2797 */
|
|
|
2798 AVPacket *pkt;
|
|
|
2799
|
|
|
2800 /**
|
|
|
2801 * VBV delay coded in the last frame (in periods of a 27 MHz clock).
|
|
|
2802 * Used for compliant TS muxing.
|
|
|
2803 * - encoding: Set by libavcodec.
|
|
|
2804 * - decoding: unused.
|
|
|
2805 */
|
|
|
2806 uint64_t vbv_delay;
|
|
|
2807
|
|
|
2808 /**
|
|
|
2809 * Timebase in which pkt_dts/pts and AVPacket.dts/pts are.
|
|
|
2810 * Code outside libavcodec should access this field using:
|
|
|
2811 * av_codec_{get,set}_pkt_timebase(avctx)
|
|
|
2812 * - encoding unused.
|
|
|
2813 * - decodimg set by user
|
|
|
2814 */
|
|
|
2815 AVRational pkt_timebase;
|
|
|
2816
|
|
|
2817 /**
|
|
|
2818 * AVCodecDescriptor
|
|
|
2819 * Code outside libavcodec should access this field using:
|
|
|
2820 * av_codec_{get,set}_codec_descriptor(avctx)
|
|
|
2821 * - encoding: unused.
|
|
|
2822 * - decoding: set by libavcodec.
|
|
|
2823 */
|
|
|
2824 const AVCodecDescriptor *codec_descriptor;
|
|
|
2825
|
|
|
2826 #if !FF_API_LOWRES
|
|
|
2827 /**
|
|
|
2828 * low resolution decoding, 1-> 1/2 size, 2->1/4 size
|
|
|
2829 * - encoding: unused
|
|
|
2830 * - decoding: Set by user.
|
|
|
2831 * Code outside libavcodec should access this field using:
|
|
|
2832 * av_codec_{get,set}_lowres(avctx)
|
|
|
2833 */
|
|
|
2834 int lowres;
|
|
|
2835 #endif
|
|
|
2836
|
|
|
2837 /**
|
|
|
2838 * Current statistics for PTS correction.
|
|
|
2839 * - decoding: maintained and used by libavcodec, not intended to be used by user apps
|
|
|
2840 * - encoding: unused
|
|
|
2841 */
|
|
|
2842 int64_t pts_correction_num_faulty_pts; /// Number of incorrect PTS values so far
|
|
|
2843 int64_t pts_correction_num_faulty_dts; /// Number of incorrect DTS values so far
|
|
|
2844 int64_t pts_correction_last_pts; /// PTS of the last frame
|
|
|
2845 int64_t pts_correction_last_dts; /// DTS of the last frame
|
|
|
2846
|
|
|
2847 /**
|
|
|
2848 * Character encoding of the input subtitles file.
|
|
|
2849 * - decoding: set by user
|
|
|
2850 * - encoding: unused
|
|
|
2851 */
|
|
|
2852 char *sub_charenc;
|
|
|
2853
|
|
|
2854 /**
|
|
|
2855 * Subtitles character encoding mode. Formats or codecs might be adjusting
|
|
|
2856 * this setting (if they are doing the conversion themselves for instance).
|
|
|
2857 * - decoding: set by libavcodec
|
|
|
2858 * - encoding: unused
|
|
|
2859 */
|
|
|
2860 int sub_charenc_mode;
|
|
|
2861 #define FF_SUB_CHARENC_MODE_DO_NOTHING -1 ///< do nothing (demuxer outputs a stream supposed to be already in UTF-8, or the codec is bitmap for instance)
|
|
|
2862 #define FF_SUB_CHARENC_MODE_AUTOMATIC 0 ///< libavcodec will select the mode itself
|
|
|
2863 #define FF_SUB_CHARENC_MODE_PRE_DECODER 1 ///< the AVPacket data needs to be recoded to UTF-8 before being fed to the decoder, requires iconv
|
|
|
2864
|
|
|
2865 } AVCodecContext;
|
|
|
2866
|
|
|
2867 AVRational av_codec_get_pkt_timebase (const AVCodecContext *avctx);
|
|
|
2868 void av_codec_set_pkt_timebase (AVCodecContext *avctx, AVRational val);
|
|
|
2869
|
|
|
2870 const AVCodecDescriptor *av_codec_get_codec_descriptor(const AVCodecContext *avctx);
|
|
|
2871 void av_codec_set_codec_descriptor(AVCodecContext *avctx, const AVCodecDescriptor *desc);
|
|
|
2872
|
|
|
2873 int av_codec_get_lowres(const AVCodecContext *avctx);
|
|
|
2874 void av_codec_set_lowres(AVCodecContext *avctx, int val);
|
|
|
2875
|
|
|
2876 /**
|
|
|
2877 * AVProfile.
|
|
|
2878 */
|
|
|
2879 typedef struct AVProfile {
|
|
|
2880 int profile;
|
|
|
2881 const char *name; ///< short name for the profile
|
|
|
2882 } AVProfile;
|
|
|
2883
|
|
|
2884 typedef struct AVCodecDefault AVCodecDefault;
|
|
|
2885
|
|
|
2886 struct AVSubtitle;
|
|
|
2887
|
|
|
2888 /**
|
|
|
2889 * AVCodec.
|
|
|
2890 */
|
|
|
2891 typedef struct AVCodec {
|
|
|
2892 /**
|
|
|
2893 * Name of the codec implementation.
|
|
|
2894 * The name is globally unique among encoders and among decoders (but an
|
|
|
2895 * encoder and a decoder can share the same name).
|
|
|
2896 * This is the primary way to find a codec from the user perspective.
|
|
|
2897 */
|
|
|
2898 const char *name;
|
|
|
2899 /**
|
|
|
2900 * Descriptive name for the codec, meant to be more human readable than name.
|
|
|
2901 * You should use the NULL_IF_CONFIG_SMALL() macro to define it.
|
|
|
2902 */
|
|
|
2903 const char *long_name;
|
|
|
2904 enum AVMediaType type;
|
|
|
2905 enum AVCodecID id;
|
|
|
2906 /**
|
|
|
2907 * Codec capabilities.
|
|
|
2908 * see CODEC_CAP_*
|
|
|
2909 */
|
|
|
2910 int capabilities;
|
|
|
2911 const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0}
|
|
|
2912 const enum AVPixelFormat *pix_fmts; ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1
|
|
|
2913 const int *supported_samplerates; ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
|
|
|
2914 const enum AVSampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1
|
|
|
2915 const uint64_t *channel_layouts; ///< array of support channel layouts, or NULL if unknown. array is terminated by 0
|
|
|
2916 uint8_t max_lowres; ///< maximum value for lowres supported by the decoder
|
|
|
2917 const AVClass *priv_class; ///< AVClass for the private context
|
|
|
2918 const AVProfile *profiles; ///< array of recognized profiles, or NULL if unknown, array is terminated by {FF_PROFILE_UNKNOWN}
|
|
|
2919
|
|
|
2920 /*****************************************************************
|
|
|
2921 * No fields below this line are part of the public API. They
|
|
|
2922 * may not be used outside of libavcodec and can be changed and
|
|
|
2923 * removed at will.
|
|
|
2924 * New public fields should be added right above.
|
|
|
2925 *****************************************************************
|
|
|
2926 */
|
|
|
2927 int priv_data_size;
|
|
|
2928 struct AVCodec *next;
|
|
|
2929 /**
|
|
|
2930 * @name Frame-level threading support functions
|
|
|
2931 * @{
|
|
|
2932 */
|
|
|
2933 /**
|
|
|
2934 * If defined, called on thread contexts when they are created.
|
|
|
2935 * If the codec allocates writable tables in init(), re-allocate them here.
|
|
|
2936 * priv_data will be set to a copy of the original.
|
|
|
2937 */
|
|
|
2938 int (*init_thread_copy)(AVCodecContext *);
|
|
|
2939 /**
|
|
|
2940 * Copy necessary context variables from a previous thread context to the current one.
|
|
|
2941 * If not defined, the next thread will start automatically; otherwise, the codec
|
|
|
2942 * must call ff_thread_finish_setup().
|
|
|
2943 *
|
|
|
2944 * dst and src will (rarely) point to the same context, in which case memcpy should be skipped.
|
|
|
2945 */
|
|
|
2946 int (*update_thread_context)(AVCodecContext *dst, const AVCodecContext *src);
|
|
|
2947 /** @} */
|
|
|
2948
|
|
|
2949 /**
|
|
|
2950 * Private codec-specific defaults.
|
|
|
2951 */
|
|
|
2952 const AVCodecDefault *defaults;
|
|
|
2953
|
|
|
2954 /**
|
|
|
2955 * Initialize codec static data, called from avcodec_register().
|
|
|
2956 */
|
|
|
2957 void (*init_static_data)(struct AVCodec *codec);
|
|
|
2958
|
|
|
2959 int (*init)(AVCodecContext *);
|
|
|
2960 int (*encode_sub)(AVCodecContext *, uint8_t *buf, int buf_size,
|
|
|
2961 const struct AVSubtitle *sub);
|
|
|
2962 /**
|
|
|
2963 * Encode data to an AVPacket.
|
|
|
2964 *
|
|
|
2965 * @param avctx codec context
|
|
|
2966 * @param avpkt output AVPacket (may contain a user-provided buffer)
|
|
|
2967 * @param[in] frame AVFrame containing the raw data to be encoded
|
|
|
2968 * @param[out] got_packet_ptr encoder sets to 0 or 1 to indicate that a
|
|
|
2969 * non-empty packet was returned in avpkt.
|
|
|
2970 * @return 0 on success, negative error code on failure
|
|
|
2971 */
|
|
|
2972 int (*encode2)(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame,
|
|
|
2973 int *got_packet_ptr);
|
|
|
2974 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt);
|
|
|
2975 int (*close)(AVCodecContext *);
|
|
|
2976 /**
|
|
|
2977 * Flush buffers.
|
|
|
2978 * Will be called when seeking
|
|
|
2979 */
|
|
|
2980 void (*flush)(AVCodecContext *);
|
|
|
2981 } AVCodec;
|
|
|
2982
|
|
|
2983 /**
|
|
|
2984 * AVHWAccel.
|
|
|
2985 */
|
|
|
2986 typedef struct AVHWAccel {
|
|
|
2987 /**
|
|
|
2988 * Name of the hardware accelerated codec.
|
|
|
2989 * The name is globally unique among encoders and among decoders (but an
|
|
|
2990 * encoder and a decoder can share the same name).
|
|
|
2991 */
|
|
|
2992 const char *name;
|
|
|
2993
|
|
|
2994 /**
|
|
|
2995 * Type of codec implemented by the hardware accelerator.
|
|
|
2996 *
|
|
|
2997 * See AVMEDIA_TYPE_xxx
|
|
|
2998 */
|
|
|
2999 enum AVMediaType type;
|
|
|
3000
|
|
|
3001 /**
|
|
|
3002 * Codec implemented by the hardware accelerator.
|
|
|
3003 *
|
|
|
3004 * See AV_CODEC_ID_xxx
|
|
|
3005 */
|
|
|
3006 enum AVCodecID id;
|
|
|
3007
|
|
|
3008 /**
|
|
|
3009 * Supported pixel format.
|
|
|
3010 *
|
|
|
3011 * Only hardware accelerated formats are supported here.
|
|
|
3012 */
|
|
|
3013 enum AVPixelFormat pix_fmt;
|
|
|
3014
|
|
|
3015 /**
|
|
|
3016 * Hardware accelerated codec capabilities.
|
|
|
3017 * see FF_HWACCEL_CODEC_CAP_*
|
|
|
3018 */
|
|
|
3019 int capabilities;
|
|
|
3020
|
|
|
3021 struct AVHWAccel *next;
|
|
|
3022
|
|
|
3023 /**
|
|
|
3024 * Called at the beginning of each frame or field picture.
|
|
|
3025 *
|
|
|
3026 * Meaningful frame information (codec specific) is guaranteed to
|
|
|
3027 * be parsed at this point. This function is mandatory.
|
|
|
3028 *
|
|
|
3029 * Note that buf can be NULL along with buf_size set to 0.
|
|
|
3030 * Otherwise, this means the whole frame is available at this point.
|
|
|
3031 *
|
|
|
3032 * @param avctx the codec context
|
|
|
3033 * @param buf the frame data buffer base
|
|
|
3034 * @param buf_size the size of the frame in bytes
|
|
|
3035 * @return zero if successful, a negative value otherwise
|
|
|
3036 */
|
|
|
3037 int (*start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
|
|
|
3038
|
|
|
3039 /**
|
|
|
3040 * Callback for each slice.
|
|
|
3041 *
|
|
|
3042 * Meaningful slice information (codec specific) is guaranteed to
|
|
|
3043 * be parsed at this point. This function is mandatory.
|
|
|
3044 *
|
|
|
3045 * @param avctx the codec context
|
|
|
3046 * @param buf the slice data buffer base
|
|
|
3047 * @param buf_size the size of the slice in bytes
|
|
|
3048 * @return zero if successful, a negative value otherwise
|
|
|
3049 */
|
|
|
3050 int (*decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
|
|
|
3051
|
|
|
3052 /**
|
|
|
3053 * Called at the end of each frame or field picture.
|
|
|
3054 *
|
|
|
3055 * The whole picture is parsed at this point and can now be sent
|
|
|
3056 * to the hardware accelerator. This function is mandatory.
|
|
|
3057 *
|
|
|
3058 * @param avctx the codec context
|
|
|
3059 * @return zero if successful, a negative value otherwise
|
|
|
3060 */
|
|
|
3061 int (*end_frame)(AVCodecContext *avctx);
|
|
|
3062
|
|
|
3063 /**
|
|
|
3064 * Size of HW accelerator private data.
|
|
|
3065 *
|
|
|
3066 * Private data is allocated with av_mallocz() before
|
|
|
3067 * AVCodecContext.get_buffer() and deallocated after
|
|
|
3068 * AVCodecContext.release_buffer().
|
|
|
3069 */
|
|
|
3070 int priv_data_size;
|
|
|
3071 } AVHWAccel;
|
|
|
3072
|
|
|
3073 /**
|
|
|
3074 * @defgroup lavc_picture AVPicture
|
|
|
3075 *
|
|
|
3076 * Functions for working with AVPicture
|
|
|
3077 * @{
|
|
|
3078 */
|
|
|
3079
|
|
|
3080 /**
|
|
|
3081 * four components are given, that's all.
|
|
|
3082 * the last component is alpha
|
|
|
3083 */
|
|
|
3084 typedef struct AVPicture {
|
|
|
3085 uint8_t *data[AV_NUM_DATA_POINTERS];
|
|
|
3086 int linesize[AV_NUM_DATA_POINTERS]; ///< number of bytes per line
|
|
|
3087 } AVPicture;
|
|
|
3088
|
|
|
3089 /**
|
|
|
3090 * @}
|
|
|
3091 */
|
|
|
3092
|
|
|
3093 enum AVSubtitleType {
|
|
|
3094 SUBTITLE_NONE,
|
|
|
3095
|
|
|
3096 SUBTITLE_BITMAP, ///< A bitmap, pict will be set
|
|
|
3097
|
|
|
3098 /**
|
|
|
3099 * Plain text, the text field must be set by the decoder and is
|
|
|
3100 * authoritative. ass and pict fields may contain approximations.
|
|
|
3101 */
|
|
|
3102 SUBTITLE_TEXT,
|
|
|
3103
|
|
|
3104 /**
|
|
|
3105 * Formatted text, the ass field must be set by the decoder and is
|
|
|
3106 * authoritative. pict and text fields may contain approximations.
|
|
|
3107 */
|
|
|
3108 SUBTITLE_ASS,
|
|
|
3109 };
|
|
|
3110
|
|
|
3111 #define AV_SUBTITLE_FLAG_FORCED 0x00000001
|
|
|
3112
|
|
|
3113 typedef struct AVSubtitleRect {
|
|
|
3114 int x; ///< top left corner of pict, undefined when pict is not set
|
|
|
3115 int y; ///< top left corner of pict, undefined when pict is not set
|
|
|
3116 int w; ///< width of pict, undefined when pict is not set
|
|
|
3117 int h; ///< height of pict, undefined when pict is not set
|
|
|
3118 int nb_colors; ///< number of colors in pict, undefined when pict is not set
|
|
|
3119
|
|
|
3120 /**
|
|
|
3121 * data+linesize for the bitmap of this subtitle.
|
|
|
3122 * can be set for text/ass as well once they where rendered
|
|
|
3123 */
|
|
|
3124 AVPicture pict;
|
|
|
3125 enum AVSubtitleType type;
|
|
|
3126
|
|
|
3127 char *text; ///< 0 terminated plain UTF-8 text
|
|
|
3128
|
|
|
3129 /**
|
|
|
3130 * 0 terminated ASS/SSA compatible event line.
|
|
|
3131 * The presentation of this is unaffected by the other values in this
|
|
|
3132 * struct.
|
|
|
3133 */
|
|
|
3134 char *ass;
|
|
|
3135
|
|
|
3136 int flags;
|
|
|
3137 } AVSubtitleRect;
|
|
|
3138
|
|
|
3139 typedef struct AVSubtitle {
|
|
|
3140 uint16_t format; /* 0 = graphics */
|
|
|
3141 uint32_t start_display_time; /* relative to packet pts, in ms */
|
|
|
3142 uint32_t end_display_time; /* relative to packet pts, in ms */
|
|
|
3143 unsigned num_rects;
|
|
|
3144 AVSubtitleRect **rects;
|
|
|
3145 int64_t pts; ///< Same as packet pts, in AV_TIME_BASE
|
|
|
3146 } AVSubtitle;
|
|
|
3147
|
|
|
3148 /**
|
|
|
3149 * If c is NULL, returns the first registered codec,
|
|
|
3150 * if c is non-NULL, returns the next registered codec after c,
|
|
|
3151 * or NULL if c is the last one.
|
|
|
3152 */
|
|
|
3153 AVCodec *av_codec_next(const AVCodec *c);
|
|
|
3154
|
|
|
3155 /**
|
|
|
3156 * Return the LIBAVCODEC_VERSION_INT constant.
|
|
|
3157 */
|
|
|
3158 unsigned avcodec_version(void);
|
|
|
3159
|
|
|
3160 /**
|
|
|
3161 * Return the libavcodec build-time configuration.
|
|
|
3162 */
|
|
|
3163 const char *avcodec_configuration(void);
|
|
|
3164
|
|
|
3165 /**
|
|
|
3166 * Return the libavcodec license.
|
|
|
3167 */
|
|
|
3168 const char *avcodec_license(void);
|
|
|
3169
|
|
|
3170 /**
|
|
|
3171 * Register the codec codec and initialize libavcodec.
|
|
|
3172 *
|
|
|
3173 * @warning either this function or avcodec_register_all() must be called
|
|
|
3174 * before any other libavcodec functions.
|
|
|
3175 *
|
|
|
3176 * @see avcodec_register_all()
|
|
|
3177 */
|
|
|
3178 void avcodec_register(AVCodec *codec);
|
|
|
3179
|
|
|
3180 /**
|
|
|
3181 * Register all the codecs, parsers and bitstream filters which were enabled at
|
|
|
3182 * configuration time. If you do not call this function you can select exactly
|
|
|
3183 * which formats you want to support, by using the individual registration
|
|
|
3184 * functions.
|
|
|
3185 *
|
|
|
3186 * @see avcodec_register
|
|
|
3187 * @see av_register_codec_parser
|
|
|
3188 * @see av_register_bitstream_filter
|
|
|
3189 */
|
|
|
3190 void avcodec_register_all(void);
|
|
|
3191
|
|
|
3192
|
|
|
3193 #if FF_API_ALLOC_CONTEXT
|
|
|
3194 /**
|
|
|
3195 * Allocate an AVCodecContext and set its fields to default values. The
|
|
|
3196 * resulting struct can be deallocated by simply calling av_free().
|
|
|
3197 *
|
|
|
3198 * @return An AVCodecContext filled with default values or NULL on failure.
|
|
|
3199 * @see avcodec_get_context_defaults
|
|
|
3200 *
|
|
|
3201 * @deprecated use avcodec_alloc_context3()
|
|
|
3202 */
|
|
|
3203 attribute_deprecated
|
|
|
3204 AVCodecContext *avcodec_alloc_context(void);
|
|
|
3205
|
|
|
3206 /** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
|
|
|
3207 * we WILL change its arguments and name a few times! */
|
|
|
3208 attribute_deprecated
|
|
|
3209 AVCodecContext *avcodec_alloc_context2(enum AVMediaType);
|
|
|
3210
|
|
|
3211 /**
|
|
|
3212 * Set the fields of the given AVCodecContext to default values.
|
|
|
3213 *
|
|
|
3214 * @param s The AVCodecContext of which the fields should be set to default values.
|
|
|
3215 * @deprecated use avcodec_get_context_defaults3
|
|
|
3216 */
|
|
|
3217 attribute_deprecated
|
|
|
3218 void avcodec_get_context_defaults(AVCodecContext *s);
|
|
|
3219
|
|
|
3220 /** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
|
|
|
3221 * we WILL change its arguments and name a few times! */
|
|
|
3222 attribute_deprecated
|
|
|
3223 void avcodec_get_context_defaults2(AVCodecContext *s, enum AVMediaType);
|
|
|
3224 #endif
|
|
|
3225
|
|
|
3226 /**
|
|
|
3227 * Allocate an AVCodecContext and set its fields to default values. The
|
|
|
3228 * resulting struct can be deallocated by calling avcodec_close() on it followed
|
|
|
3229 * by av_free().
|
|
|
3230 *
|
|
|
3231 * @param codec if non-NULL, allocate private data and initialize defaults
|
|
|
3232 * for the given codec. It is illegal to then call avcodec_open2()
|
|
|
3233 * with a different codec.
|
|
|
3234 * If NULL, then the codec-specific defaults won't be initialized,
|
|
|
3235 * which may result in suboptimal default settings (this is
|
|
|
3236 * important mainly for encoders, e.g. libx264).
|
|
|
3237 *
|
|
|
3238 * @return An AVCodecContext filled with default values or NULL on failure.
|
|
|
3239 * @see avcodec_get_context_defaults
|
|
|
3240 */
|
|
|
3241 AVCodecContext *avcodec_alloc_context3(const AVCodec *codec);
|
|
|
3242
|
|
|
3243 /**
|
|
|
3244 * Set the fields of the given AVCodecContext to default values corresponding
|
|
|
3245 * to the given codec (defaults may be codec-dependent).
|
|
|
3246 *
|
|
|
3247 * Do not call this function if a non-NULL codec has been passed
|
|
|
3248 * to avcodec_alloc_context3() that allocated this AVCodecContext.
|
|
|
3249 * If codec is non-NULL, it is illegal to call avcodec_open2() with a
|
|
|
3250 * different codec on this AVCodecContext.
|
|
|
3251 */
|
|
|
3252 int avcodec_get_context_defaults3(AVCodecContext *s, const AVCodec *codec);
|
|
|
3253
|
|
|
3254 /**
|
|
|
3255 * Get the AVClass for AVCodecContext. It can be used in combination with
|
|
|
3256 * AV_OPT_SEARCH_FAKE_OBJ for examining options.
|
|
|
3257 *
|
|
|
3258 * @see av_opt_find().
|
|
|
3259 */
|
|
|
3260 const AVClass *avcodec_get_class(void);
|
|
|
3261
|
|
|
3262 /**
|
|
|
3263 * Get the AVClass for AVFrame. It can be used in combination with
|
|
|
3264 * AV_OPT_SEARCH_FAKE_OBJ for examining options.
|
|
|
3265 *
|
|
|
3266 * @see av_opt_find().
|
|
|
3267 */
|
|
|
3268 const AVClass *avcodec_get_frame_class(void);
|
|
|
3269
|
|
|
3270 /**
|
|
|
3271 * Get the AVClass for AVSubtitleRect. It can be used in combination with
|
|
|
3272 * AV_OPT_SEARCH_FAKE_OBJ for examining options.
|
|
|
3273 *
|
|
|
3274 * @see av_opt_find().
|
|
|
3275 */
|
|
|
3276 const AVClass *avcodec_get_subtitle_rect_class(void);
|
|
|
3277
|
|
|
3278 /**
|
|
|
3279 * Copy the settings of the source AVCodecContext into the destination
|
|
|
3280 * AVCodecContext. The resulting destination codec context will be
|
|
|
3281 * unopened, i.e. you are required to call avcodec_open2() before you
|
|
|
3282 * can use this AVCodecContext to decode/encode video/audio data.
|
|
|
3283 *
|
|
|
3284 * @param dest target codec context, should be initialized with
|
|
|
3285 * avcodec_alloc_context3(), but otherwise uninitialized
|
|
|
3286 * @param src source codec context
|
|
|
3287 * @return AVERROR() on error (e.g. memory allocation error), 0 on success
|
|
|
3288 */
|
|
|
3289 int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src);
|
|
|
3290
|
|
|
3291 /**
|
|
|
3292 * Allocate an AVFrame and set its fields to default values. The resulting
|
|
|
3293 * struct must be freed using avcodec_free_frame().
|
|
|
3294 *
|
|
|
3295 * @return An AVFrame filled with default values or NULL on failure.
|
|
|
3296 * @see avcodec_get_frame_defaults
|
|
|
3297 */
|
|
|
3298 AVFrame *avcodec_alloc_frame(void);
|
|
|
3299
|
|
|
3300 /**
|
|
|
3301 * Set the fields of the given AVFrame to default values.
|
|
|
3302 *
|
|
|
3303 * @param frame The AVFrame of which the fields should be set to default values.
|
|
|
3304 */
|
|
|
3305 void avcodec_get_frame_defaults(AVFrame *frame);
|
|
|
3306
|
|
|
3307 /**
|
|
|
3308 * Free the frame and any dynamically allocated objects in it,
|
|
|
3309 * e.g. extended_data.
|
|
|
3310 *
|
|
|
3311 * @param frame frame to be freed. The pointer will be set to NULL.
|
|
|
3312 *
|
|
|
3313 * @warning this function does NOT free the data buffers themselves
|
|
|
3314 * (it does not know how, since they might have been allocated with
|
|
|
3315 * a custom get_buffer()).
|
|
|
3316 */
|
|
|
3317 void avcodec_free_frame(AVFrame **frame);
|
|
|
3318
|
|
|
3319 #if FF_API_AVCODEC_OPEN
|
|
|
3320 /**
|
|
|
3321 * Initialize the AVCodecContext to use the given AVCodec. Prior to using this
|
|
|
3322 * function the context has to be allocated.
|
|
|
3323 *
|
|
|
3324 * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
|
|
|
3325 * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
|
|
|
3326 * retrieving a codec.
|
|
|
3327 *
|
|
|
3328 * @warning This function is not thread safe!
|
|
|
3329 *
|
|
|
3330 * @code
|
|
|
3331 * avcodec_register_all();
|
|
|
3332 * codec = avcodec_find_decoder(AV_CODEC_ID_H264);
|
|
|
3333 * if (!codec)
|
|
|
3334 * exit(1);
|
|
|
3335 *
|
|
|
3336 * context = avcodec_alloc_context3(codec);
|
|
|
3337 *
|
|
|
3338 * if (avcodec_open(context, codec) < 0)
|
|
|
3339 * exit(1);
|
|
|
3340 * @endcode
|
|
|
3341 *
|
|
|
3342 * @param avctx The context which will be set up to use the given codec.
|
|
|
3343 * @param codec The codec to use within the context.
|
|
|
3344 * @return zero on success, a negative value on error
|
|
|
3345 * @see avcodec_alloc_context3, avcodec_find_decoder, avcodec_find_encoder, avcodec_close
|
|
|
3346 *
|
|
|
3347 * @deprecated use avcodec_open2
|
|
|
3348 */
|
|
|
3349 attribute_deprecated
|
|
|
3350 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
|
|
|
3351 #endif
|
|
|
3352
|
|
|
3353 /**
|
|
|
3354 * Initialize the AVCodecContext to use the given AVCodec. Prior to using this
|
|
|
3355 * function the context has to be allocated with avcodec_alloc_context3().
|
|
|
3356 *
|
|
|
3357 * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
|
|
|
3358 * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
|
|
|
3359 * retrieving a codec.
|
|
|
3360 *
|
|
|
3361 * @warning This function is not thread safe!
|
|
|
3362 *
|
|
|
3363 * @code
|
|
|
3364 * avcodec_register_all();
|
|
|
3365 * av_dict_set(&opts, "b", "2.5M", 0);
|
|
|
3366 * codec = avcodec_find_decoder(AV_CODEC_ID_H264);
|
|
|
3367 * if (!codec)
|
|
|
3368 * exit(1);
|
|
|
3369 *
|
|
|
3370 * context = avcodec_alloc_context3(codec);
|
|
|
3371 *
|
|
|
3372 * if (avcodec_open2(context, codec, opts) < 0)
|
|
|
3373 * exit(1);
|
|
|
3374 * @endcode
|
|
|
3375 *
|
|
|
3376 * @param avctx The context to initialize.
|
|
|
3377 * @param codec The codec to open this context for. If a non-NULL codec has been
|
|
|
3378 * previously passed to avcodec_alloc_context3() or
|
|
|
3379 * avcodec_get_context_defaults3() for this context, then this
|
|
|
3380 * parameter MUST be either NULL or equal to the previously passed
|
|
|
3381 * codec.
|
|
|
3382 * @param options A dictionary filled with AVCodecContext and codec-private options.
|
|
|
3383 * On return this object will be filled with options that were not found.
|
|
|
3384 *
|
|
|
3385 * @return zero on success, a negative value on error
|
|
|
3386 * @see avcodec_alloc_context3(), avcodec_find_decoder(), avcodec_find_encoder(),
|
|
|
3387 * av_dict_set(), av_opt_find().
|
|
|
3388 */
|
|
|
3389 int avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options);
|
|
|
3390
|
|
|
3391 /**
|
|
|
3392 * Close a given AVCodecContext and free all the data associated with it
|
|
|
3393 * (but not the AVCodecContext itself).
|
|
|
3394 *
|
|
|
3395 * Calling this function on an AVCodecContext that hasn't been opened will free
|
|
|
3396 * the codec-specific data allocated in avcodec_alloc_context3() /
|
|
|
3397 * avcodec_get_context_defaults3() with a non-NULL codec. Subsequent calls will
|
|
|
3398 * do nothing.
|
|
|
3399 */
|
|
|
3400 int avcodec_close(AVCodecContext *avctx);
|
|
|
3401
|
|
|
3402 /**
|
|
|
3403 * Free all allocated data in the given subtitle struct.
|
|
|
3404 *
|
|
|
3405 * @param sub AVSubtitle to free.
|
|
|
3406 */
|
|
|
3407 void avsubtitle_free(AVSubtitle *sub);
|
|
|
3408
|
|
|
3409 /**
|
|
|
3410 * @}
|
|
|
3411 */
|
|
|
3412
|
|
|
3413 /**
|
|
|
3414 * @addtogroup lavc_packet
|
|
|
3415 * @{
|
|
|
3416 */
|
|
|
3417
|
|
|
3418 #if FF_API_DESTRUCT_PACKET
|
|
|
3419 /**
|
|
|
3420 * Default packet destructor.
|
|
|
3421 * @deprecated use the AVBuffer API instead
|
|
|
3422 */
|
|
|
3423 attribute_deprecated
|
|
|
3424 void av_destruct_packet(AVPacket *pkt);
|
|
|
3425 #endif
|
|
|
3426
|
|
|
3427 /**
|
|
|
3428 * Initialize optional fields of a packet with default values.
|
|
|
3429 *
|
|
|
3430 * Note, this does not touch the data and size members, which have to be
|
|
|
3431 * initialized separately.
|
|
|
3432 *
|
|
|
3433 * @param pkt packet
|
|
|
3434 */
|
|
|
3435 void av_init_packet(AVPacket *pkt);
|
|
|
3436
|
|
|
3437 /**
|
|
|
3438 * Allocate the payload of a packet and initialize its fields with
|
|
|
3439 * default values.
|
|
|
3440 *
|
|
|
3441 * @param pkt packet
|
|
|
3442 * @param size wanted payload size
|
|
|
3443 * @return 0 if OK, AVERROR_xxx otherwise
|
|
|
3444 */
|
|
|
3445 int av_new_packet(AVPacket *pkt, int size);
|
|
|
3446
|
|
|
3447 /**
|
|
|
3448 * Reduce packet size, correctly zeroing padding
|
|
|
3449 *
|
|
|
3450 * @param pkt packet
|
|
|
3451 * @param size new size
|
|
|
3452 */
|
|
|
3453 void av_shrink_packet(AVPacket *pkt, int size);
|
|
|
3454
|
|
|
3455 /**
|
|
|
3456 * Increase packet size, correctly zeroing padding
|
|
|
3457 *
|
|
|
3458 * @param pkt packet
|
|
|
3459 * @param grow_by number of bytes by which to increase the size of the packet
|
|
|
3460 */
|
|
|
3461 int av_grow_packet(AVPacket *pkt, int grow_by);
|
|
|
3462
|
|
|
3463 /**
|
|
|
3464 * Initialize a reference-counted packet from av_malloc()ed data.
|
|
|
3465 *
|
|
|
3466 * @param pkt packet to be initialized. This function will set the data, size,
|
|
|
3467 * buf and destruct fields, all others are left untouched.
|
|
|
3468 * @param data Data allocated by av_malloc() to be used as packet data. If this
|
|
|
3469 * function returns successfully, the data is owned by the underlying AVBuffer.
|
|
|
3470 * The caller may not access the data through other means.
|
|
|
3471 * @param size size of data in bytes, without the padding. I.e. the full buffer
|
|
|
3472 * size is assumed to be size + FF_INPUT_BUFFER_PADDING_SIZE.
|
|
|
3473 *
|
|
|
3474 * @return 0 on success, a negative AVERROR on error
|
|
|
3475 */
|
|
|
3476 int av_packet_from_data(AVPacket *pkt, uint8_t *data, int size);
|
|
|
3477
|
|
|
3478 /**
|
|
|
3479 * @warning This is a hack - the packet memory allocation stuff is broken. The
|
|
|
3480 * packet is allocated if it was not really allocated.
|
|
|
3481 */
|
|
|
3482 int av_dup_packet(AVPacket *pkt);
|
|
|
3483
|
|
|
3484 /**
|
|
|
3485 * Copy packet, including contents
|
|
|
3486 *
|
|
|
3487 * @return 0 on success, negative AVERROR on fail
|
|
|
3488 */
|
|
|
3489 int av_copy_packet(AVPacket *dst, AVPacket *src);
|
|
|
3490
|
|
|
3491 /**
|
|
|
3492 * Copy packet side data
|
|
|
3493 *
|
|
|
3494 * @return 0 on success, negative AVERROR on fail
|
|
|
3495 */
|
|
|
3496 int av_copy_packet_side_data(AVPacket *dst, AVPacket *src);
|
|
|
3497
|
|
|
3498 /**
|
|
|
3499 * Free a packet.
|
|
|
3500 *
|
|
|
3501 * @param pkt packet to free
|
|
|
3502 */
|
|
|
3503 void av_free_packet(AVPacket *pkt);
|
|
|
3504
|
|
|
3505 /**
|
|
|
3506 * Allocate new information of a packet.
|
|
|
3507 *
|
|
|
3508 * @param pkt packet
|
|
|
3509 * @param type side information type
|
|
|
3510 * @param size side information size
|
|
|
3511 * @return pointer to fresh allocated data or NULL otherwise
|
|
|
3512 */
|
|
|
3513 uint8_t* av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
|
|
|
3514 int size);
|
|
|
3515
|
|
|
3516 /**
|
|
|
3517 * Shrink the already allocated side data buffer
|
|
|
3518 *
|
|
|
3519 * @param pkt packet
|
|
|
3520 * @param type side information type
|
|
|
3521 * @param size new side information size
|
|
|
3522 * @return 0 on success, < 0 on failure
|
|
|
3523 */
|
|
|
3524 int av_packet_shrink_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
|
|
|
3525 int size);
|
|
|
3526
|
|
|
3527 /**
|
|
|
3528 * Get side information from packet.
|
|
|
3529 *
|
|
|
3530 * @param pkt packet
|
|
|
3531 * @param type desired side information type
|
|
|
3532 * @param size pointer for side information size to store (optional)
|
|
|
3533 * @return pointer to data if present or NULL otherwise
|
|
|
3534 */
|
|
|
3535 uint8_t* av_packet_get_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
|
|
|
3536 int *size);
|
|
|
3537
|
|
|
3538 int av_packet_merge_side_data(AVPacket *pkt);
|
|
|
3539
|
|
|
3540 int av_packet_split_side_data(AVPacket *pkt);
|
|
|
3541
|
|
|
3542
|
|
|
3543 /**
|
|
|
3544 * @}
|
|
|
3545 */
|
|
|
3546
|
|
|
3547 /**
|
|
|
3548 * @addtogroup lavc_decoding
|
|
|
3549 * @{
|
|
|
3550 */
|
|
|
3551
|
|
|
3552 /**
|
|
|
3553 * Find a registered decoder with a matching codec ID.
|
|
|
3554 *
|
|
|
3555 * @param id AVCodecID of the requested decoder
|
|
|
3556 * @return A decoder if one was found, NULL otherwise.
|
|
|
3557 */
|
|
|
3558 AVCodec *avcodec_find_decoder(enum AVCodecID id);
|
|
|
3559
|
|
|
3560 /**
|
|
|
3561 * Find a registered decoder with the specified name.
|
|
|
3562 *
|
|
|
3563 * @param name name of the requested decoder
|
|
|
3564 * @return A decoder if one was found, NULL otherwise.
|
|
|
3565 */
|
|
|
3566 AVCodec *avcodec_find_decoder_by_name(const char *name);
|
|
|
3567
|
|
|
3568 #if FF_API_GET_BUFFER
|
|
|
3569 attribute_deprecated int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
|
|
|
3570 attribute_deprecated void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
|
|
|
3571 attribute_deprecated int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
|
|
|
3572 #endif
|
|
|
3573
|
|
|
3574 /**
|
|
|
3575 * The default callback for AVCodecContext.get_buffer2(). It is made public so
|
|
|
3576 * it can be called by custom get_buffer2() implementations for decoders without
|
|
|
3577 * CODEC_CAP_DR1 set.
|
|
|
3578 */
|
|
|
3579 int avcodec_default_get_buffer2(AVCodecContext *s, AVFrame *frame, int flags);
|
|
|
3580
|
|
|
3581 /**
|
|
|
3582 * Return the amount of padding in pixels which the get_buffer callback must
|
|
|
3583 * provide around the edge of the image for codecs which do not have the
|
|
|
3584 * CODEC_FLAG_EMU_EDGE flag.
|
|
|
3585 *
|
|
|
3586 * @return Required padding in pixels.
|
|
|
3587 */
|
|
|
3588 unsigned avcodec_get_edge_width(void);
|
|
|
3589
|
|
|
3590 /**
|
|
|
3591 * Modify width and height values so that they will result in a memory
|
|
|
3592 * buffer that is acceptable for the codec if you do not use any horizontal
|
|
|
3593 * padding.
|
|
|
3594 *
|
|
|
3595 * May only be used if a codec with CODEC_CAP_DR1 has been opened.
|
|
|
3596 * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
|
|
|
3597 * according to avcodec_get_edge_width() before.
|
|
|
3598 */
|
|
|
3599 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
|
|
|
3600
|
|
|
3601 /**
|
|
|
3602 * Modify width and height values so that they will result in a memory
|
|
|
3603 * buffer that is acceptable for the codec if you also ensure that all
|
|
|
3604 * line sizes are a multiple of the respective linesize_align[i].
|
|
|
3605 *
|
|
|
3606 * May only be used if a codec with CODEC_CAP_DR1 has been opened.
|
|
|
3607 * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
|
|
|
3608 * according to avcodec_get_edge_width() before.
|
|
|
3609 */
|
|
|
3610 void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
|
|
|
3611 int linesize_align[AV_NUM_DATA_POINTERS]);
|
|
|
3612
|
|
|
3613 #if FF_API_OLD_DECODE_AUDIO
|
|
|
3614 /**
|
|
|
3615 * Wrapper function which calls avcodec_decode_audio4.
|
|
|
3616 *
|
|
|
3617 * @deprecated Use avcodec_decode_audio4 instead.
|
|
|
3618 *
|
|
|
3619 * Decode the audio frame of size avpkt->size from avpkt->data into samples.
|
|
|
3620 * Some decoders may support multiple frames in a single AVPacket, such
|
|
|
3621 * decoders would then just decode the first frame. In this case,
|
|
|
3622 * avcodec_decode_audio3 has to be called again with an AVPacket that contains
|
|
|
3623 * the remaining data in order to decode the second frame etc.
|
|
|
3624 * If no frame
|
|
|
3625 * could be outputted, frame_size_ptr is zero. Otherwise, it is the
|
|
|
3626 * decompressed frame size in bytes.
|
|
|
3627 *
|
|
|
3628 * @warning You must set frame_size_ptr to the allocated size of the
|
|
|
3629 * output buffer before calling avcodec_decode_audio3().
|
|
|
3630 *
|
|
|
3631 * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
|
|
|
3632 * the actual read bytes because some optimized bitstream readers read 32 or 64
|
|
|
3633 * bits at once and could read over the end.
|
|
|
3634 *
|
|
|
3635 * @warning The end of the input buffer avpkt->data should be set to 0 to ensure that
|
|
|
3636 * no overreading happens for damaged MPEG streams.
|
|
|
3637 *
|
|
|
3638 * @warning You must not provide a custom get_buffer() when using
|
|
|
3639 * avcodec_decode_audio3(). Doing so will override it with
|
|
|
3640 * avcodec_default_get_buffer. Use avcodec_decode_audio4() instead,
|
|
|
3641 * which does allow the application to provide a custom get_buffer().
|
|
|
3642 *
|
|
|
3643 * @note You might have to align the input buffer avpkt->data and output buffer
|
|
|
3644 * samples. The alignment requirements depend on the CPU: On some CPUs it isn't
|
|
|
3645 * necessary at all, on others it won't work at all if not aligned and on others
|
|
|
3646 * it will work but it will have an impact on performance.
|
|
|
3647 *
|
|
|
3648 * In practice, avpkt->data should have 4 byte alignment at minimum and
|
|
|
3649 * samples should be 16 byte aligned unless the CPU doesn't need it
|
|
|
3650 * (AltiVec and SSE do).
|
|
|
3651 *
|
|
|
3652 * @note Codecs which have the CODEC_CAP_DELAY capability set have a delay
|
|
|
3653 * between input and output, these need to be fed with avpkt->data=NULL,
|
|
|
3654 * avpkt->size=0 at the end to return the remaining frames.
|
|
|
3655 *
|
|
|
3656 * @param avctx the codec context
|
|
|
3657 * @param[out] samples the output buffer, sample type in avctx->sample_fmt
|
|
|
3658 * If the sample format is planar, each channel plane will
|
|
|
3659 * be the same size, with no padding between channels.
|
|
|
3660 * @param[in,out] frame_size_ptr the output buffer size in bytes
|
|
|
3661 * @param[in] avpkt The input AVPacket containing the input buffer.
|
|
|
3662 * You can create such packet with av_init_packet() and by then setting
|
|
|
3663 * data and size, some decoders might in addition need other fields.
|
|
|
3664 * All decoders are designed to use the least fields possible though.
|
|
|
3665 * @return On error a negative value is returned, otherwise the number of bytes
|
|
|
3666 * used or zero if no frame data was decompressed (used) from the input AVPacket.
|
|
|
3667 */
|
|
|
3668 attribute_deprecated int avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
|
|
|
3669 int *frame_size_ptr,
|
|
|
3670 AVPacket *avpkt);
|
|
|
3671 #endif
|
|
|
3672
|
|
|
3673 /**
|
|
|
3674 * Decode the audio frame of size avpkt->size from avpkt->data into frame.
|
|
|
3675 *
|
|
|
3676 * Some decoders may support multiple frames in a single AVPacket. Such
|
|
|
3677 * decoders would then just decode the first frame. In this case,
|
|
|
3678 * avcodec_decode_audio4 has to be called again with an AVPacket containing
|
|
|
3679 * the remaining data in order to decode the second frame, etc...
|
|
|
3680 * Even if no frames are returned, the packet needs to be fed to the decoder
|
|
|
3681 * with remaining data until it is completely consumed or an error occurs.
|
|
|
3682 *
|
|
|
3683 * @warning The input buffer, avpkt->data must be FF_INPUT_BUFFER_PADDING_SIZE
|
|
|
3684 * larger than the actual read bytes because some optimized bitstream
|
|
|
3685 * readers read 32 or 64 bits at once and could read over the end.
|
|
|
3686 *
|
|
|
3687 * @note You might have to align the input buffer. The alignment requirements
|
|
|
3688 * depend on the CPU and the decoder.
|
|
|
3689 *
|
|
|
3690 * @param avctx the codec context
|
|
|
3691 * @param[out] frame The AVFrame in which to store decoded audio samples.
|
|
|
3692 * The decoder will allocate a buffer for the decoded frame by
|
|
|
3693 * calling the AVCodecContext.get_buffer2() callback.
|
|
|
3694 * When AVCodecContext.refcounted_frames is set to 1, the frame is
|
|
|
3695 * reference counted and the returned reference belongs to the
|
|
|
3696 * caller. The caller must release the frame using av_frame_unref()
|
|
|
3697 * when the frame is no longer needed. The caller may safely write
|
|
|
3698 * to the frame if av_frame_is_writable() returns 1.
|
|
|
3699 * When AVCodecContext.refcounted_frames is set to 0, the returned
|
|
|
3700 * reference belongs to the decoder and is valid only until the
|
|
|
3701 * next call to this function or until closing the decoder.
|
|
|
3702 * The caller may not write to it.
|
|
|
3703 * @param[out] got_frame_ptr Zero if no frame could be decoded, otherwise it is
|
|
|
3704 * non-zero.
|
|
|
3705 * @param[in] avpkt The input AVPacket containing the input buffer.
|
|
|
3706 * At least avpkt->data and avpkt->size should be set. Some
|
|
|
3707 * decoders might also require additional fields to be set.
|
|
|
3708 * @return A negative error code is returned if an error occurred during
|
|
|
3709 * decoding, otherwise the number of bytes consumed from the input
|
|
|
3710 * AVPacket is returned.
|
|
|
3711 */
|
|
|
3712 int avcodec_decode_audio4(AVCodecContext *avctx, AVFrame *frame,
|
|
|
3713 int *got_frame_ptr, const AVPacket *avpkt);
|
|
|
3714
|
|
|
3715 /**
|
|
|
3716 * Decode the video frame of size avpkt->size from avpkt->data into picture.
|
|
|
3717 * Some decoders may support multiple frames in a single AVPacket, such
|
|
|
3718 * decoders would then just decode the first frame.
|
|
|
3719 *
|
|
|
3720 * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
|
|
|
3721 * the actual read bytes because some optimized bitstream readers read 32 or 64
|
|
|
3722 * bits at once and could read over the end.
|
|
|
3723 *
|
|
|
3724 * @warning The end of the input buffer buf should be set to 0 to ensure that
|
|
|
3725 * no overreading happens for damaged MPEG streams.
|
|
|
3726 *
|
|
|
3727 * @note You might have to align the input buffer avpkt->data.
|
|
|
3728 * The alignment requirements depend on the CPU: on some CPUs it isn't
|
|
|
3729 * necessary at all, on others it won't work at all if not aligned and on others
|
|
|
3730 * it will work but it will have an impact on performance.
|
|
|
3731 *
|
|
|
3732 * In practice, avpkt->data should have 4 byte alignment at minimum.
|
|
|
3733 *
|
|
|
3734 * @note Codecs which have the CODEC_CAP_DELAY capability set have a delay
|
|
|
3735 * between input and output, these need to be fed with avpkt->data=NULL,
|
|
|
3736 * avpkt->size=0 at the end to return the remaining frames.
|
|
|
3737 *
|
|
|
3738 * @param avctx the codec context
|
|
|
3739 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
|
|
|
3740 * Use av_frame_alloc() to get an AVFrame. The codec will
|
|
|
3741 * allocate memory for the actual bitmap by calling the
|
|
|
3742 * AVCodecContext.get_buffer2() callback.
|
|
|
3743 * When AVCodecContext.refcounted_frames is set to 1, the frame is
|
|
|
3744 * reference counted and the returned reference belongs to the
|
|
|
3745 * caller. The caller must release the frame using av_frame_unref()
|
|
|
3746 * when the frame is no longer needed. The caller may safely write
|
|
|
3747 * to the frame if av_frame_is_writable() returns 1.
|
|
|
3748 * When AVCodecContext.refcounted_frames is set to 0, the returned
|
|
|
3749 * reference belongs to the decoder and is valid only until the
|
|
|
3750 * next call to this function or until closing the decoder. The
|
|
|
3751 * caller may not write to it.
|
|
|
3752 *
|
|
|
3753 * @param[in] avpkt The input AVpacket containing the input buffer.
|
|
|
3754 * You can create such packet with av_init_packet() and by then setting
|
|
|
3755 * data and size, some decoders might in addition need other fields like
|
|
|
3756 * flags&AV_PKT_FLAG_KEY. All decoders are designed to use the least
|
|
|
3757 * fields possible.
|
|
|
3758 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
|
|
|
3759 * @return On error a negative value is returned, otherwise the number of bytes
|
|
|
3760 * used or zero if no frame could be decompressed.
|
|
|
3761 */
|
|
|
3762 int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
|
|
|
3763 int *got_picture_ptr,
|
|
|
3764 const AVPacket *avpkt);
|
|
|
3765
|
|
|
3766 /**
|
|
|
3767 * Decode a subtitle message.
|
|
|
3768 * Return a negative value on error, otherwise return the number of bytes used.
|
|
|
3769 * If no subtitle could be decompressed, got_sub_ptr is zero.
|
|
|
3770 * Otherwise, the subtitle is stored in *sub.
|
|
|
3771 * Note that CODEC_CAP_DR1 is not available for subtitle codecs. This is for
|
|
|
3772 * simplicity, because the performance difference is expect to be negligible
|
|
|
3773 * and reusing a get_buffer written for video codecs would probably perform badly
|
|
|
3774 * due to a potentially very different allocation pattern.
|
|
|
3775 *
|
|
|
3776 * @param avctx the codec context
|
|
|
3777 * @param[out] sub The AVSubtitle in which the decoded subtitle will be stored, must be
|
|
|
3778 freed with avsubtitle_free if *got_sub_ptr is set.
|
|
|
3779 * @param[in,out] got_sub_ptr Zero if no subtitle could be decompressed, otherwise, it is nonzero.
|
|
|
3780 * @param[in] avpkt The input AVPacket containing the input buffer.
|
|
|
3781 */
|
|
|
3782 int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
|
|
|
3783 int *got_sub_ptr,
|
|
|
3784 AVPacket *avpkt);
|
|
|
3785
|
|
|
3786 /**
|
|
|
3787 * @defgroup lavc_parsing Frame parsing
|
|
|
3788 * @{
|
|
|
3789 */
|
|
|
3790
|
|
|
3791 typedef struct AVCodecParserContext {
|
|
|
3792 void *priv_data;
|
|
|
3793 struct AVCodecParser *parser;
|
|
|
3794 int64_t frame_offset; /* offset of the current frame */
|
|
|
3795 int64_t cur_offset; /* current offset
|
|
|
3796 (incremented by each av_parser_parse()) */
|
|
|
3797 int64_t next_frame_offset; /* offset of the next frame */
|
|
|
3798 /* video info */
|
|
|
3799 int pict_type; /* XXX: Put it back in AVCodecContext. */
|
|
|
3800 /**
|
|
|
3801 * This field is used for proper frame duration computation in lavf.
|
|
|
3802 * It signals, how much longer the frame duration of the current frame
|
|
|
3803 * is compared to normal frame duration.
|
|
|
3804 *
|
|
|
3805 * frame_duration = (1 + repeat_pict) * time_base
|
|
|
3806 *
|
|
|
3807 * It is used by codecs like H.264 to display telecined material.
|
|
|
3808 */
|
|
|
3809 int repeat_pict; /* XXX: Put it back in AVCodecContext. */
|
|
|
3810 int64_t pts; /* pts of the current frame */
|
|
|
3811 int64_t dts; /* dts of the current frame */
|
|
|
3812
|
|
|
3813 /* private data */
|
|
|
3814 int64_t last_pts;
|
|
|
3815 int64_t last_dts;
|
|
|
3816 int fetch_timestamp;
|
|
|
3817
|
|
|
3818 #define AV_PARSER_PTS_NB 4
|
|
|
3819 int cur_frame_start_index;
|
|
|
3820 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
|
|
|
3821 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
|
|
|
3822 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
|
|
|
3823
|
|
|
3824 int flags;
|
|
|
3825 #define PARSER_FLAG_COMPLETE_FRAMES 0x0001
|
|
|
3826 #define PARSER_FLAG_ONCE 0x0002
|
|
|
3827 /// Set if the parser has a valid file offset
|
|
|
3828 #define PARSER_FLAG_FETCHED_OFFSET 0x0004
|
|
|
3829 #define PARSER_FLAG_USE_CODEC_TS 0x1000
|
|
|
3830
|
|
|
3831 int64_t offset; ///< byte offset from starting packet start
|
|
|
3832 int64_t cur_frame_end[AV_PARSER_PTS_NB];
|
|
|
3833
|
|
|
3834 /**
|
|
|
3835 * Set by parser to 1 for key frames and 0 for non-key frames.
|
|
|
3836 * It is initialized to -1, so if the parser doesn't set this flag,
|
|
|
3837 * old-style fallback using AV_PICTURE_TYPE_I picture type as key frames
|
|
|
3838 * will be used.
|
|
|
3839 */
|
|
|
3840 int key_frame;
|
|
|
3841
|
|
|
3842 /**
|
|
|
3843 * Time difference in stream time base units from the pts of this
|
|
|
3844 * packet to the point at which the output from the decoder has converged
|
|
|
3845 * independent from the availability of previous frames. That is, the
|
|
|
3846 * frames are virtually identical no matter if decoding started from
|
|
|
3847 * the very first frame or from this keyframe.
|
|
|
3848 * Is AV_NOPTS_VALUE if unknown.
|
|
|
3849 * This field is not the display duration of the current frame.
|
|
|
3850 * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
|
|
|
3851 * set.
|
|
|
3852 *
|
|
|
3853 * The purpose of this field is to allow seeking in streams that have no
|
|
|
3854 * keyframes in the conventional sense. It corresponds to the
|
|
|
3855 * recovery point SEI in H.264 and match_time_delta in NUT. It is also
|
|
|
3856 * essential for some types of subtitle streams to ensure that all
|
|
|
3857 * subtitles are correctly displayed after seeking.
|
|
|
3858 */
|
|
|
3859 int64_t convergence_duration;
|
|
|
3860
|
|
|
3861 // Timestamp generation support:
|
|
|
3862 /**
|
|
|
3863 * Synchronization point for start of timestamp generation.
|
|
|
3864 *
|
|
|
3865 * Set to >0 for sync point, 0 for no sync point and <0 for undefined
|
|
|
3866 * (default).
|
|
|
3867 *
|
|
|
3868 * For example, this corresponds to presence of H.264 buffering period
|
|
|
3869 * SEI message.
|
|
|
3870 */
|
|
|
3871 int dts_sync_point;
|
|
|
3872
|
|
|
3873 /**
|
|
|
3874 * Offset of the current timestamp against last timestamp sync point in
|
|
|
3875 * units of AVCodecContext.time_base.
|
|
|
3876 *
|
|
|
3877 * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
|
|
|
3878 * contain a valid timestamp offset.
|
|
|
3879 *
|
|
|
3880 * Note that the timestamp of sync point has usually a nonzero
|
|
|
3881 * dts_ref_dts_delta, which refers to the previous sync point. Offset of
|
|
|
3882 * the next frame after timestamp sync point will be usually 1.
|
|
|
3883 *
|
|
|
3884 * For example, this corresponds to H.264 cpb_removal_delay.
|
|
|
3885 */
|
|
|
3886 int dts_ref_dts_delta;
|
|
|
3887
|
|
|
3888 /**
|
|
|
3889 * Presentation delay of current frame in units of AVCodecContext.time_base.
|
|
|
3890 *
|
|
|
3891 * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
|
|
|
3892 * contain valid non-negative timestamp delta (presentation time of a frame
|
|
|
3893 * must not lie in the past).
|
|
|
3894 *
|
|
|
3895 * This delay represents the difference between decoding and presentation
|
|
|
3896 * time of the frame.
|
|
|
3897 *
|
|
|
3898 * For example, this corresponds to H.264 dpb_output_delay.
|
|
|
3899 */
|
|
|
3900 int pts_dts_delta;
|
|
|
3901
|
|
|
3902 /**
|
|
|
3903 * Position of the packet in file.
|
|
|
3904 *
|
|
|
3905 * Analogous to cur_frame_pts/dts
|
|
|
3906 */
|
|
|
3907 int64_t cur_frame_pos[AV_PARSER_PTS_NB];
|
|
|
3908
|
|
|
3909 /**
|
|
|
3910 * Byte position of currently parsed frame in stream.
|
|
|
3911 */
|
|
|
3912 int64_t pos;
|
|
|
3913
|
|
|
3914 /**
|
|
|
3915 * Previous frame byte position.
|
|
|
3916 */
|
|
|
3917 int64_t last_pos;
|
|
|
3918
|
|
|
3919 /**
|
|
|
3920 * Duration of the current frame.
|
|
|
3921 * For audio, this is in units of 1 / AVCodecContext.sample_rate.
|
|
|
3922 * For all other types, this is in units of AVCodecContext.time_base.
|
|
|
3923 */
|
|
|
3924 int duration;
|
|
|
3925
|
|
|
3926 enum AVFieldOrder field_order;
|
|
|
3927 } AVCodecParserContext;
|
|
|
3928
|
|
|
3929 typedef struct AVCodecParser {
|
|
|
3930 int codec_ids[5]; /* several codec IDs are permitted */
|
|
|
3931 int priv_data_size;
|
|
|
3932 int (*parser_init)(AVCodecParserContext *s);
|
|
|
3933 int (*parser_parse)(AVCodecParserContext *s,
|
|
|
3934 AVCodecContext *avctx,
|
|
|
3935 const uint8_t **poutbuf, int *poutbuf_size,
|
|
|
3936 const uint8_t *buf, int buf_size);
|
|
|
3937 void (*parser_close)(AVCodecParserContext *s);
|
|
|
3938 int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
|
|
|
3939 struct AVCodecParser *next;
|
|
|
3940 } AVCodecParser;
|
|
|
3941
|
|
|
3942 AVCodecParser *av_parser_next(AVCodecParser *c);
|
|
|
3943
|
|
|
3944 void av_register_codec_parser(AVCodecParser *parser);
|
|
|
3945 AVCodecParserContext *av_parser_init(int codec_id);
|
|
|
3946
|
|
|
3947 /**
|
|
|
3948 * Parse a packet.
|
|
|
3949 *
|
|
|
3950 * @param s parser context.
|
|
|
3951 * @param avctx codec context.
|
|
|
3952 * @param poutbuf set to pointer to parsed buffer or NULL if not yet finished.
|
|
|
3953 * @param poutbuf_size set to size of parsed buffer or zero if not yet finished.
|
|
|
3954 * @param buf input buffer.
|
|
|
3955 * @param buf_size input length, to signal EOF, this should be 0 (so that the last frame can be output).
|
|
|
3956 * @param pts input presentation timestamp.
|
|
|
3957 * @param dts input decoding timestamp.
|
|
|
3958 * @param pos input byte position in stream.
|
|
|
3959 * @return the number of bytes of the input bitstream used.
|
|
|
3960 *
|
|
|
3961 * Example:
|
|
|
3962 * @code
|
|
|
3963 * while(in_len){
|
|
|
3964 * len = av_parser_parse2(myparser, AVCodecContext, &data, &size,
|
|
|
3965 * in_data, in_len,
|
|
|
3966 * pts, dts, pos);
|
|
|
3967 * in_data += len;
|
|
|
3968 * in_len -= len;
|
|
|
3969 *
|
|
|
3970 * if(size)
|
|
|
3971 * decode_frame(data, size);
|
|
|
3972 * }
|
|
|
3973 * @endcode
|
|
|
3974 */
|
|
|
3975 int av_parser_parse2(AVCodecParserContext *s,
|
|
|
3976 AVCodecContext *avctx,
|
|
|
3977 uint8_t **poutbuf, int *poutbuf_size,
|
|
|
3978 const uint8_t *buf, int buf_size,
|
|
|
3979 int64_t pts, int64_t dts,
|
|
|
3980 int64_t pos);
|
|
|
3981
|
|
|
3982 /**
|
|
|
3983 * @return 0 if the output buffer is a subset of the input, 1 if it is allocated and must be freed
|
|
|
3984 * @deprecated use AVBitStreamFilter
|
|
|
3985 */
|
|
|
3986 int av_parser_change(AVCodecParserContext *s,
|
|
|
3987 AVCodecContext *avctx,
|
|
|
3988 uint8_t **poutbuf, int *poutbuf_size,
|
|
|
3989 const uint8_t *buf, int buf_size, int keyframe);
|
|
|
3990 void av_parser_close(AVCodecParserContext *s);
|
|
|
3991
|
|
|
3992 /**
|
|
|
3993 * @}
|
|
|
3994 * @}
|
|
|
3995 */
|
|
|
3996
|
|
|
3997 /**
|
|
|
3998 * @addtogroup lavc_encoding
|
|
|
3999 * @{
|
|
|
4000 */
|
|
|
4001
|
|
|
4002 /**
|
|
|
4003 * Find a registered encoder with a matching codec ID.
|
|
|
4004 *
|
|
|
4005 * @param id AVCodecID of the requested encoder
|
|
|
4006 * @return An encoder if one was found, NULL otherwise.
|
|
|
4007 */
|
|
|
4008 AVCodec *avcodec_find_encoder(enum AVCodecID id);
|
|
|
4009
|
|
|
4010 /**
|
|
|
4011 * Find a registered encoder with the specified name.
|
|
|
4012 *
|
|
|
4013 * @param name name of the requested encoder
|
|
|
4014 * @return An encoder if one was found, NULL otherwise.
|
|
|
4015 */
|
|
|
4016 AVCodec *avcodec_find_encoder_by_name(const char *name);
|
|
|
4017
|
|
|
4018 #if FF_API_OLD_ENCODE_AUDIO
|
|
|
4019 /**
|
|
|
4020 * Encode an audio frame from samples into buf.
|
|
|
4021 *
|
|
|
4022 * @deprecated Use avcodec_encode_audio2 instead.
|
|
|
4023 *
|
|
|
4024 * @note The output buffer should be at least FF_MIN_BUFFER_SIZE bytes large.
|
|
|
4025 * However, for codecs with avctx->frame_size equal to 0 (e.g. PCM) the user
|
|
|
4026 * will know how much space is needed because it depends on the value passed
|
|
|
4027 * in buf_size as described below. In that case a lower value can be used.
|
|
|
4028 *
|
|
|
4029 * @param avctx the codec context
|
|
|
4030 * @param[out] buf the output buffer
|
|
|
4031 * @param[in] buf_size the output buffer size
|
|
|
4032 * @param[in] samples the input buffer containing the samples
|
|
|
4033 * The number of samples read from this buffer is frame_size*channels,
|
|
|
4034 * both of which are defined in avctx.
|
|
|
4035 * For codecs which have avctx->frame_size equal to 0 (e.g. PCM) the number of
|
|
|
4036 * samples read from samples is equal to:
|
|
|
4037 * buf_size * 8 / (avctx->channels * av_get_bits_per_sample(avctx->codec_id))
|
|
|
4038 * This also implies that av_get_bits_per_sample() must not return 0 for these
|
|
|
4039 * codecs.
|
|
|
4040 * @return On error a negative value is returned, on success zero or the number
|
|
|
4041 * of bytes used to encode the data read from the input buffer.
|
|
|
4042 */
|
|
|
4043 int attribute_deprecated avcodec_encode_audio(AVCodecContext *avctx,
|
|
|
4044 uint8_t *buf, int buf_size,
|
|
|
4045 const short *samples);
|
|
|
4046 #endif
|
|
|
4047
|
|
|
4048 /**
|
|
|
4049 * Encode a frame of audio.
|
|
|
4050 *
|
|
|
4051 * Takes input samples from frame and writes the next output packet, if
|
|
|
4052 * available, to avpkt. The output packet does not necessarily contain data for
|
|
|
4053 * the most recent frame, as encoders can delay, split, and combine input frames
|
|
|
4054 * internally as needed.
|
|
|
4055 *
|
|
|
4056 * @param avctx codec context
|
|
|
4057 * @param avpkt output AVPacket.
|
|
|
4058 * The user can supply an output buffer by setting
|
|
|
4059 * avpkt->data and avpkt->size prior to calling the
|
|
|
4060 * function, but if the size of the user-provided data is not
|
|
|
4061 * large enough, encoding will fail. If avpkt->data and
|
|
|
4062 * avpkt->size are set, avpkt->destruct must also be set. All
|
|
|
4063 * other AVPacket fields will be reset by the encoder using
|
|
|
4064 * av_init_packet(). If avpkt->data is NULL, the encoder will
|
|
|
4065 * allocate it. The encoder will set avpkt->size to the size
|
|
|
4066 * of the output packet.
|
|
|
4067 *
|
|
|
4068 * If this function fails or produces no output, avpkt will be
|
|
|
4069 * freed using av_free_packet() (i.e. avpkt->destruct will be
|
|
|
4070 * called to free the user supplied buffer).
|
|
|
4071 * @param[in] frame AVFrame containing the raw audio data to be encoded.
|
|
|
4072 * May be NULL when flushing an encoder that has the
|
|
|
4073 * CODEC_CAP_DELAY capability set.
|
|
|
4074 * If CODEC_CAP_VARIABLE_FRAME_SIZE is set, then each frame
|
|
|
4075 * can have any number of samples.
|
|
|
4076 * If it is not set, frame->nb_samples must be equal to
|
|
|
4077 * avctx->frame_size for all frames except the last.
|
|
|
4078 * The final frame may be smaller than avctx->frame_size.
|
|
|
4079 * @param[out] got_packet_ptr This field is set to 1 by libavcodec if the
|
|
|
4080 * output packet is non-empty, and to 0 if it is
|
|
|
4081 * empty. If the function returns an error, the
|
|
|
4082 * packet can be assumed to be invalid, and the
|
|
|
4083 * value of got_packet_ptr is undefined and should
|
|
|
4084 * not be used.
|
|
|
4085 * @return 0 on success, negative error code on failure
|
|
|
4086 */
|
|
|
4087 int avcodec_encode_audio2(AVCodecContext *avctx, AVPacket *avpkt,
|
|
|
4088 const AVFrame *frame, int *got_packet_ptr);
|
|
|
4089
|
|
|
4090 #if FF_API_OLD_ENCODE_VIDEO
|
|
|
4091 /**
|
|
|
4092 * @deprecated use avcodec_encode_video2() instead.
|
|
|
4093 *
|
|
|
4094 * Encode a video frame from pict into buf.
|
|
|
4095 * The input picture should be
|
|
|
4096 * stored using a specific format, namely avctx.pix_fmt.
|
|
|
4097 *
|
|
|
4098 * @param avctx the codec context
|
|
|
4099 * @param[out] buf the output buffer for the bitstream of encoded frame
|
|
|
4100 * @param[in] buf_size the size of the output buffer in bytes
|
|
|
4101 * @param[in] pict the input picture to encode
|
|
|
4102 * @return On error a negative value is returned, on success zero or the number
|
|
|
4103 * of bytes used from the output buffer.
|
|
|
4104 */
|
|
|
4105 attribute_deprecated
|
|
|
4106 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
|
|
|
4107 const AVFrame *pict);
|
|
|
4108 #endif
|
|
|
4109
|
|
|
4110 /**
|
|
|
4111 * Encode a frame of video.
|
|
|
4112 *
|
|
|
4113 * Takes input raw video data from frame and writes the next output packet, if
|
|
|
4114 * available, to avpkt. The output packet does not necessarily contain data for
|
|
|
4115 * the most recent frame, as encoders can delay and reorder input frames
|
|
|
4116 * internally as needed.
|
|
|
4117 *
|
|
|
4118 * @param avctx codec context
|
|
|
4119 * @param avpkt output AVPacket.
|
|
|
4120 * The user can supply an output buffer by setting
|
|
|
4121 * avpkt->data and avpkt->size prior to calling the
|
|
|
4122 * function, but if the size of the user-provided data is not
|
|
|
4123 * large enough, encoding will fail. All other AVPacket fields
|
|
|
4124 * will be reset by the encoder using av_init_packet(). If
|
|
|
4125 * avpkt->data is NULL, the encoder will allocate it.
|
|
|
4126 * The encoder will set avpkt->size to the size of the
|
|
|
4127 * output packet. The returned data (if any) belongs to the
|
|
|
4128 * caller, he is responsible for freeing it.
|
|
|
4129 *
|
|
|
4130 * If this function fails or produces no output, avpkt will be
|
|
|
4131 * freed using av_free_packet() (i.e. avpkt->destruct will be
|
|
|
4132 * called to free the user supplied buffer).
|
|
|
4133 * @param[in] frame AVFrame containing the raw video data to be encoded.
|
|
|
4134 * May be NULL when flushing an encoder that has the
|
|
|
4135 * CODEC_CAP_DELAY capability set.
|
|
|
4136 * @param[out] got_packet_ptr This field is set to 1 by libavcodec if the
|
|
|
4137 * output packet is non-empty, and to 0 if it is
|
|
|
4138 * empty. If the function returns an error, the
|
|
|
4139 * packet can be assumed to be invalid, and the
|
|
|
4140 * value of got_packet_ptr is undefined and should
|
|
|
4141 * not be used.
|
|
|
4142 * @return 0 on success, negative error code on failure
|
|
|
4143 */
|
|
|
4144 int avcodec_encode_video2(AVCodecContext *avctx, AVPacket *avpkt,
|
|
|
4145 const AVFrame *frame, int *got_packet_ptr);
|
|
|
4146
|
|
|
4147 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
|
|
|
4148 const AVSubtitle *sub);
|
|
|
4149
|
|
|
4150
|
|
|
4151 /**
|
|
|
4152 * @}
|
|
|
4153 */
|
|
|
4154
|
|
|
4155 #if FF_API_AVCODEC_RESAMPLE
|
|
|
4156 /**
|
|
|
4157 * @defgroup lavc_resample Audio resampling
|
|
|
4158 * @ingroup libavc
|
|
|
4159 * @deprecated use libswresample instead
|
|
|
4160 *
|
|
|
4161 * @{
|
|
|
4162 */
|
|
|
4163 struct ReSampleContext;
|
|
|
4164 struct AVResampleContext;
|
|
|
4165
|
|
|
4166 typedef struct ReSampleContext ReSampleContext;
|
|
|
4167
|
|
|
4168 /**
|
|
|
4169 * Initialize audio resampling context.
|
|
|
4170 *
|
|
|
4171 * @param output_channels number of output channels
|
|
|
4172 * @param input_channels number of input channels
|
|
|
4173 * @param output_rate output sample rate
|
|
|
4174 * @param input_rate input sample rate
|
|
|
4175 * @param sample_fmt_out requested output sample format
|
|
|
4176 * @param sample_fmt_in input sample format
|
|
|
4177 * @param filter_length length of each FIR filter in the filterbank relative to the cutoff frequency
|
|
|
4178 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
|
|
|
4179 * @param linear if 1 then the used FIR filter will be linearly interpolated
|
|
|
4180 between the 2 closest, if 0 the closest will be used
|
|
|
4181 * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
|
|
|
4182 * @return allocated ReSampleContext, NULL if error occurred
|
|
|
4183 */
|
|
|
4184 attribute_deprecated
|
|
|
4185 ReSampleContext *av_audio_resample_init(int output_channels, int input_channels,
|
|
|
4186 int output_rate, int input_rate,
|
|
|
4187 enum AVSampleFormat sample_fmt_out,
|
|
|
4188 enum AVSampleFormat sample_fmt_in,
|
|
|
4189 int filter_length, int log2_phase_count,
|
|
|
4190 int linear, double cutoff);
|
|
|
4191
|
|
|
4192 attribute_deprecated
|
|
|
4193 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
|
|
|
4194
|
|
|
4195 /**
|
|
|
4196 * Free resample context.
|
|
|
4197 *
|
|
|
4198 * @param s a non-NULL pointer to a resample context previously
|
|
|
4199 * created with av_audio_resample_init()
|
|
|
4200 */
|
|
|
4201 attribute_deprecated
|
|
|
4202 void audio_resample_close(ReSampleContext *s);
|
|
|
4203
|
|
|
4204
|
|
|
4205 /**
|
|
|
4206 * Initialize an audio resampler.
|
|
|
4207 * Note, if either rate is not an integer then simply scale both rates up so they are.
|
|
|
4208 * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
|
|
|
4209 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
|
|
|
4210 * @param linear If 1 then the used FIR filter will be linearly interpolated
|
|
|
4211 between the 2 closest, if 0 the closest will be used
|
|
|
4212 * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
|
|
|
4213 */
|
|
|
4214 attribute_deprecated
|
|
|
4215 struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
|
|
|
4216
|
|
|
4217 /**
|
|
|
4218 * Resample an array of samples using a previously configured context.
|
|
|
4219 * @param src an array of unconsumed samples
|
|
|
4220 * @param consumed the number of samples of src which have been consumed are returned here
|
|
|
4221 * @param src_size the number of unconsumed samples available
|
|
|
4222 * @param dst_size the amount of space in samples available in dst
|
|
|
4223 * @param update_ctx If this is 0 then the context will not be modified, that way several channels can be resampled with the same context.
|
|
|
4224 * @return the number of samples written in dst or -1 if an error occurred
|
|
|
4225 */
|
|
|
4226 attribute_deprecated
|
|
|
4227 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
|
|
|
4228
|
|
|
4229
|
|
|
4230 /**
|
|
|
4231 * Compensate samplerate/timestamp drift. The compensation is done by changing
|
|
|
4232 * the resampler parameters, so no audible clicks or similar distortions occur
|
|
|
4233 * @param compensation_distance distance in output samples over which the compensation should be performed
|
|
|
4234 * @param sample_delta number of output samples which should be output less
|
|
|
4235 *
|
|
|
4236 * example: av_resample_compensate(c, 10, 500)
|
|
|
4237 * here instead of 510 samples only 500 samples would be output
|
|
|
4238 *
|
|
|
4239 * note, due to rounding the actual compensation might be slightly different,
|
|
|
4240 * especially if the compensation_distance is large and the in_rate used during init is small
|
|
|
4241 */
|
|
|
4242 attribute_deprecated
|
|
|
4243 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
|
|
|
4244 attribute_deprecated
|
|
|
4245 void av_resample_close(struct AVResampleContext *c);
|
|
|
4246
|
|
|
4247 /**
|
|
|
4248 * @}
|
|
|
4249 */
|
|
|
4250 #endif
|
|
|
4251
|
|
|
4252 /**
|
|
|
4253 * @addtogroup lavc_picture
|
|
|
4254 * @{
|
|
|
4255 */
|
|
|
4256
|
|
|
4257 /**
|
|
|
4258 * Allocate memory for a picture. Call avpicture_free() to free it.
|
|
|
4259 *
|
|
|
4260 * @see avpicture_fill()
|
|
|
4261 *
|
|
|
4262 * @param picture the picture to be filled in
|
|
|
4263 * @param pix_fmt the format of the picture
|
|
|
4264 * @param width the width of the picture
|
|
|
4265 * @param height the height of the picture
|
|
|
4266 * @return zero if successful, a negative value if not
|
|
|
4267 */
|
|
|
4268 int avpicture_alloc(AVPicture *picture, enum AVPixelFormat pix_fmt, int width, int height);
|
|
|
4269
|
|
|
4270 /**
|
|
|
4271 * Free a picture previously allocated by avpicture_alloc().
|
|
|
4272 * The data buffer used by the AVPicture is freed, but the AVPicture structure
|
|
|
4273 * itself is not.
|
|
|
4274 *
|
|
|
4275 * @param picture the AVPicture to be freed
|
|
|
4276 */
|
|
|
4277 void avpicture_free(AVPicture *picture);
|
|
|
4278
|
|
|
4279 /**
|
|
|
4280 * Fill in the AVPicture fields, always assume a linesize alignment of
|
|
|
4281 * 1.
|
|
|
4282 *
|
|
|
4283 * @see av_image_fill_arrays()
|
|
|
4284 */
|
|
|
4285 int avpicture_fill(AVPicture *picture, const uint8_t *ptr,
|
|
|
4286 enum AVPixelFormat pix_fmt, int width, int height);
|
|
|
4287
|
|
|
4288 /**
|
|
|
4289 * Copy pixel data from an AVPicture into a buffer, always assume a
|
|
|
4290 * linesize alignment of 1.
|
|
|
4291 *
|
|
|
4292 * @see av_image_copy_to_buffer()
|
|
|
4293 */
|
|
|
4294 int avpicture_layout(const AVPicture* src, enum AVPixelFormat pix_fmt,
|
|
|
4295 int width, int height,
|
|
|
4296 unsigned char *dest, int dest_size);
|
|
|
4297
|
|
|
4298 /**
|
|
|
4299 * Calculate the size in bytes that a picture of the given width and height
|
|
|
4300 * would occupy if stored in the given picture format.
|
|
|
4301 * Always assume a linesize alignment of 1.
|
|
|
4302 *
|
|
|
4303 * @see av_image_get_buffer_size().
|
|
|
4304 */
|
|
|
4305 int avpicture_get_size(enum AVPixelFormat pix_fmt, int width, int height);
|
|
|
4306
|
|
|
4307 #if FF_API_DEINTERLACE
|
|
|
4308 /**
|
|
|
4309 * deinterlace - if not supported return -1
|
|
|
4310 *
|
|
|
4311 * @deprecated - use yadif (in libavfilter) instead
|
|
|
4312 */
|
|
|
4313 attribute_deprecated
|
|
|
4314 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
|
|
|
4315 enum AVPixelFormat pix_fmt, int width, int height);
|
|
|
4316 #endif
|
|
|
4317 /**
|
|
|
4318 * Copy image src to dst. Wraps av_image_copy().
|
|
|
4319 */
|
|
|
4320 void av_picture_copy(AVPicture *dst, const AVPicture *src,
|
|
|
4321 enum AVPixelFormat pix_fmt, int width, int height);
|
|
|
4322
|
|
|
4323 /**
|
|
|
4324 * Crop image top and left side.
|
|
|
4325 */
|
|
|
4326 int av_picture_crop(AVPicture *dst, const AVPicture *src,
|
|
|
4327 enum AVPixelFormat pix_fmt, int top_band, int left_band);
|
|
|
4328
|
|
|
4329 /**
|
|
|
4330 * Pad image.
|
|
|
4331 */
|
|
|
4332 int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, enum AVPixelFormat pix_fmt,
|
|
|
4333 int padtop, int padbottom, int padleft, int padright, int *color);
|
|
|
4334
|
|
|
4335 /**
|
|
|
4336 * @}
|
|
|
4337 */
|
|
|
4338
|
|
|
4339 /**
|
|
|
4340 * @defgroup lavc_misc Utility functions
|
|
|
4341 * @ingroup libavc
|
|
|
4342 *
|
|
|
4343 * Miscellaneous utility functions related to both encoding and decoding
|
|
|
4344 * (or neither).
|
|
|
4345 * @{
|
|
|
4346 */
|
|
|
4347
|
|
|
4348 /**
|
|
|
4349 * @defgroup lavc_misc_pixfmt Pixel formats
|
|
|
4350 *
|
|
|
4351 * Functions for working with pixel formats.
|
|
|
4352 * @{
|
|
|
4353 */
|
|
|
4354
|
|
|
4355 /**
|
|
|
4356 * Utility function to access log2_chroma_w log2_chroma_h from
|
|
|
4357 * the pixel format AVPixFmtDescriptor.
|
|
|
4358 *
|
|
|
4359 * This function asserts that pix_fmt is valid. See av_pix_fmt_get_chroma_sub_sample
|
|
|
4360 * for one that returns a failure code and continues in case of invalid
|
|
|
4361 * pix_fmts.
|
|
|
4362 *
|
|
|
4363 * @param[in] pix_fmt the pixel format
|
|
|
4364 * @param[out] h_shift store log2_chroma_w
|
|
|
4365 * @param[out] v_shift store log2_chroma_h
|
|
|
4366 *
|
|
|
4367 * @see av_pix_fmt_get_chroma_sub_sample
|
|
|
4368 */
|
|
|
4369
|
|
|
4370 void avcodec_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int *v_shift);
|
|
|
4371
|
|
|
4372 /**
|
|
|
4373 * Return a value representing the fourCC code associated to the
|
|
|
4374 * pixel format pix_fmt, or 0 if no associated fourCC code can be
|
|
|
4375 * found.
|
|
|
4376 */
|
|
|
4377 unsigned int avcodec_pix_fmt_to_codec_tag(enum AVPixelFormat pix_fmt);
|
|
|
4378
|
|
|
4379 #define FF_LOSS_RESOLUTION 0x0001 /**< loss due to resolution change */
|
|
|
4380 #define FF_LOSS_DEPTH 0x0002 /**< loss due to color depth change */
|
|
|
4381 #define FF_LOSS_COLORSPACE 0x0004 /**< loss due to color space conversion */
|
|
|
4382 #define FF_LOSS_ALPHA 0x0008 /**< loss of alpha bits */
|
|
|
4383 #define FF_LOSS_COLORQUANT 0x0010 /**< loss due to color quantization */
|
|
|
4384 #define FF_LOSS_CHROMA 0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
|
|
|
4385
|
|
|
4386 /**
|
|
|
4387 * Compute what kind of losses will occur when converting from one specific
|
|
|
4388 * pixel format to another.
|
|
|
4389 * When converting from one pixel format to another, information loss may occur.
|
|
|
4390 * For example, when converting from RGB24 to GRAY, the color information will
|
|
|
4391 * be lost. Similarly, other losses occur when converting from some formats to
|
|
|
4392 * other formats. These losses can involve loss of chroma, but also loss of
|
|
|
4393 * resolution, loss of color depth, loss due to the color space conversion, loss
|
|
|
4394 * of the alpha bits or loss due to color quantization.
|
|
|
4395 * avcodec_get_fix_fmt_loss() informs you about the various types of losses
|
|
|
4396 * which will occur when converting from one pixel format to another.
|
|
|
4397 *
|
|
|
4398 * @param[in] dst_pix_fmt destination pixel format
|
|
|
4399 * @param[in] src_pix_fmt source pixel format
|
|
|
4400 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
|
|
|
4401 * @return Combination of flags informing you what kind of losses will occur
|
|
|
4402 * (maximum loss for an invalid dst_pix_fmt).
|
|
|
4403 */
|
|
|
4404 int avcodec_get_pix_fmt_loss(enum AVPixelFormat dst_pix_fmt, enum AVPixelFormat src_pix_fmt,
|
|
|
4405 int has_alpha);
|
|
|
4406
|
|
|
4407 /**
|
|
|
4408 * Find the best pixel format to convert to given a certain source pixel
|
|
|
4409 * format. When converting from one pixel format to another, information loss
|
|
|
4410 * may occur. For example, when converting from RGB24 to GRAY, the color
|
|
|
4411 * information will be lost. Similarly, other losses occur when converting from
|
|
|
4412 * some formats to other formats. avcodec_find_best_pix_fmt_of_2() searches which of
|
|
|
4413 * the given pixel formats should be used to suffer the least amount of loss.
|
|
|
4414 * The pixel formats from which it chooses one, are determined by the
|
|
|
4415 * pix_fmt_list parameter.
|
|
|
4416 *
|
|
|
4417 *
|
|
|
4418 * @param[in] pix_fmt_list AV_PIX_FMT_NONE terminated array of pixel formats to choose from
|
|
|
4419 * @param[in] src_pix_fmt source pixel format
|
|
|
4420 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
|
|
|
4421 * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
|
|
|
4422 * @return The best pixel format to convert to or -1 if none was found.
|
|
|
4423 */
|
|
|
4424 enum AVPixelFormat avcodec_find_best_pix_fmt_of_list(enum AVPixelFormat *pix_fmt_list,
|
|
|
4425 enum AVPixelFormat src_pix_fmt,
|
|
|
4426 int has_alpha, int *loss_ptr);
|
|
|
4427
|
|
|
4428 /**
|
|
|
4429 * Find the best pixel format to convert to given a certain source pixel
|
|
|
4430 * format and a selection of two destination pixel formats. When converting from
|
|
|
4431 * one pixel format to another, information loss may occur. For example, when converting
|
|
|
4432 * from RGB24 to GRAY, the color information will be lost. Similarly, other losses occur when
|
|
|
4433 * converting from some formats to other formats. avcodec_find_best_pix_fmt_of_2() selects which of
|
|
|
4434 * the given pixel formats should be used to suffer the least amount of loss.
|
|
|
4435 *
|
|
|
4436 * If one of the destination formats is AV_PIX_FMT_NONE the other pixel format (if valid) will be
|
|
|
4437 * returned.
|
|
|
4438 *
|
|
|
4439 * @code
|
|
|
4440 * src_pix_fmt = AV_PIX_FMT_YUV420P;
|
|
|
4441 * dst_pix_fmt1= AV_PIX_FMT_RGB24;
|
|
|
4442 * dst_pix_fmt2= AV_PIX_FMT_GRAY8;
|
|
|
4443 * dst_pix_fmt3= AV_PIX_FMT_RGB8;
|
|
|
4444 * loss= FF_LOSS_CHROMA; // don't care about chroma loss, so chroma loss will be ignored.
|
|
|
4445 * dst_pix_fmt = avcodec_find_best_pix_fmt_of_2(dst_pix_fmt1, dst_pix_fmt2, src_pix_fmt, alpha, &loss);
|
|
|
4446 * dst_pix_fmt = avcodec_find_best_pix_fmt_of_2(dst_pix_fmt, dst_pix_fmt3, src_pix_fmt, alpha, &loss);
|
|
|
4447 * @endcode
|
|
|
4448 *
|
|
|
4449 * @param[in] dst_pix_fmt1 One of the two destination pixel formats to choose from
|
|
|
4450 * @param[in] dst_pix_fmt2 The other of the two destination pixel formats to choose from
|
|
|
4451 * @param[in] src_pix_fmt Source pixel format
|
|
|
4452 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
|
|
|
4453 * @param[in, out] loss_ptr Combination of loss flags. In: selects which of the losses to ignore, i.e.
|
|
|
4454 * NULL or value of zero means we care about all losses. Out: the loss
|
|
|
4455 * that occurs when converting from src to selected dst pixel format.
|
|
|
4456 * @return The best pixel format to convert to or -1 if none was found.
|
|
|
4457 */
|
|
|
4458 enum AVPixelFormat avcodec_find_best_pix_fmt_of_2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2,
|
|
|
4459 enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr);
|
|
|
4460
|
|
|
4461 attribute_deprecated
|
|
|
4462 #if AV_HAVE_INCOMPATIBLE_FORK_ABI
|
|
|
4463 enum AVPixelFormat avcodec_find_best_pix_fmt2(enum AVPixelFormat *pix_fmt_list,
|
|
|
4464 enum AVPixelFormat src_pix_fmt,
|
|
|
4465 int has_alpha, int *loss_ptr);
|
|
|
4466 #else
|
|
|
4467 enum AVPixelFormat avcodec_find_best_pix_fmt2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2,
|
|
|
4468 enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr);
|
|
|
4469 #endif
|
|
|
4470
|
|
|
4471
|
|
|
4472 enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum AVPixelFormat * fmt);
|
|
|
4473
|
|
|
4474 /**
|
|
|
4475 * @}
|
|
|
4476 */
|
|
|
4477
|
|
|
4478 void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
|
|
|
4479
|
|
|
4480 /**
|
|
|
4481 * Put a string representing the codec tag codec_tag in buf.
|
|
|
4482 *
|
|
|
4483 * @param buf_size size in bytes of buf
|
|
|
4484 * @return the length of the string that would have been generated if
|
|
|
4485 * enough space had been available, excluding the trailing null
|
|
|
4486 */
|
|
|
4487 size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag);
|
|
|
4488
|
|
|
4489 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
|
|
|
4490
|
|
|
4491 /**
|
|
|
4492 * Return a name for the specified profile, if available.
|
|
|
4493 *
|
|
|
4494 * @param codec the codec that is searched for the given profile
|
|
|
4495 * @param profile the profile value for which a name is requested
|
|
|
4496 * @return A name for the profile if found, NULL otherwise.
|
|
|
4497 */
|
|
|
4498 const char *av_get_profile_name(const AVCodec *codec, int profile);
|
|
|
4499
|
|
|
4500 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size);
|
|
|
4501 int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int, int),void *arg, int *ret, int count);
|
|
|
4502 //FIXME func typedef
|
|
|
4503
|
|
|
4504 /**
|
|
|
4505 * Fill AVFrame audio data and linesize pointers.
|
|
|
4506 *
|
|
|
4507 * The buffer buf must be a preallocated buffer with a size big enough
|
|
|
4508 * to contain the specified samples amount. The filled AVFrame data
|
|
|
4509 * pointers will point to this buffer.
|
|
|
4510 *
|
|
|
4511 * AVFrame extended_data channel pointers are allocated if necessary for
|
|
|
4512 * planar audio.
|
|
|
4513 *
|
|
|
4514 * @param frame the AVFrame
|
|
|
4515 * frame->nb_samples must be set prior to calling the
|
|
|
4516 * function. This function fills in frame->data,
|
|
|
4517 * frame->extended_data, frame->linesize[0].
|
|
|
4518 * @param nb_channels channel count
|
|
|
4519 * @param sample_fmt sample format
|
|
|
4520 * @param buf buffer to use for frame data
|
|
|
4521 * @param buf_size size of buffer
|
|
|
4522 * @param align plane size sample alignment (0 = default)
|
|
|
4523 * @return >=0 on success, negative error code on failure
|
|
|
4524 * @todo return the size in bytes required to store the samples in
|
|
|
4525 * case of success, at the next libavutil bump
|
|
|
4526 */
|
|
|
4527 int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels,
|
|
|
4528 enum AVSampleFormat sample_fmt, const uint8_t *buf,
|
|
|
4529 int buf_size, int align);
|
|
|
4530
|
|
|
4531 /**
|
|
|
4532 * Flush buffers, should be called when seeking or when switching to a different stream.
|
|
|
4533 */
|
|
|
4534 void avcodec_flush_buffers(AVCodecContext *avctx);
|
|
|
4535
|
|
|
4536 /**
|
|
|
4537 * Return codec bits per sample.
|
|
|
4538 *
|
|
|
4539 * @param[in] codec_id the codec
|
|
|
4540 * @return Number of bits per sample or zero if unknown for the given codec.
|
|
|
4541 */
|
|
|
4542 int av_get_bits_per_sample(enum AVCodecID codec_id);
|
|
|
4543
|
|
|
4544 /**
|
|
|
4545 * Return the PCM codec associated with a sample format.
|
|
|
4546 * @param be endianness, 0 for little, 1 for big,
|
|
|
4547 * -1 (or anything else) for native
|
|
|
4548 * @return AV_CODEC_ID_PCM_* or AV_CODEC_ID_NONE
|
|
|
4549 */
|
|
|
4550 enum AVCodecID av_get_pcm_codec(enum AVSampleFormat fmt, int be);
|
|
|
4551
|
|
|
4552 /**
|
|
|
4553 * Return codec bits per sample.
|
|
|
4554 * Only return non-zero if the bits per sample is exactly correct, not an
|
|
|
4555 * approximation.
|
|
|
4556 *
|
|
|
4557 * @param[in] codec_id the codec
|
|
|
4558 * @return Number of bits per sample or zero if unknown for the given codec.
|
|
|
4559 */
|
|
|
4560 int av_get_exact_bits_per_sample(enum AVCodecID codec_id);
|
|
|
4561
|
|
|
4562 /**
|
|
|
4563 * Return audio frame duration.
|
|
|
4564 *
|
|
|
4565 * @param avctx codec context
|
|
|
4566 * @param frame_bytes size of the frame, or 0 if unknown
|
|
|
4567 * @return frame duration, in samples, if known. 0 if not able to
|
|
|
4568 * determine.
|
|
|
4569 */
|
|
|
4570 int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes);
|
|
|
4571
|
|
|
4572
|
|
|
4573 typedef struct AVBitStreamFilterContext {
|
|
|
4574 void *priv_data;
|
|
|
4575 struct AVBitStreamFilter *filter;
|
|
|
4576 AVCodecParserContext *parser;
|
|
|
4577 struct AVBitStreamFilterContext *next;
|
|
|
4578 } AVBitStreamFilterContext;
|
|
|
4579
|
|
|
4580
|
|
|
4581 typedef struct AVBitStreamFilter {
|
|
|
4582 const char *name;
|
|
|
4583 int priv_data_size;
|
|
|
4584 int (*filter)(AVBitStreamFilterContext *bsfc,
|
|
|
4585 AVCodecContext *avctx, const char *args,
|
|
|
4586 uint8_t **poutbuf, int *poutbuf_size,
|
|
|
4587 const uint8_t *buf, int buf_size, int keyframe);
|
|
|
4588 void (*close)(AVBitStreamFilterContext *bsfc);
|
|
|
4589 struct AVBitStreamFilter *next;
|
|
|
4590 } AVBitStreamFilter;
|
|
|
4591
|
|
|
4592 void av_register_bitstream_filter(AVBitStreamFilter *bsf);
|
|
|
4593 AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
|
|
|
4594 int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
|
|
|
4595 AVCodecContext *avctx, const char *args,
|
|
|
4596 uint8_t **poutbuf, int *poutbuf_size,
|
|
|
4597 const uint8_t *buf, int buf_size, int keyframe);
|
|
|
4598 void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
|
|
|
4599
|
|
|
4600 AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f);
|
|
|
4601
|
|
|
4602 /* memory */
|
|
|
4603
|
|
|
4604 /**
|
|
|
4605 * Reallocate the given block if it is not large enough, otherwise do nothing.
|
|
|
4606 *
|
|
|
4607 * @see av_realloc
|
|
|
4608 */
|
|
|
4609 void *av_fast_realloc(void *ptr, unsigned int *size, size_t min_size);
|
|
|
4610
|
|
|
4611 /**
|
|
|
4612 * Allocate a buffer, reusing the given one if large enough.
|
|
|
4613 *
|
|
|
4614 * Contrary to av_fast_realloc the current buffer contents might not be
|
|
|
4615 * preserved and on error the old buffer is freed, thus no special
|
|
|
4616 * handling to avoid memleaks is necessary.
|
|
|
4617 *
|
|
|
4618 * @param ptr pointer to pointer to already allocated buffer, overwritten with pointer to new buffer
|
|
|
4619 * @param size size of the buffer *ptr points to
|
|
|
4620 * @param min_size minimum size of *ptr buffer after returning, *ptr will be NULL and
|
|
|
4621 * *size 0 if an error occurred.
|
|
|
4622 */
|
|
|
4623 void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size);
|
|
|
4624
|
|
|
4625 /**
|
|
|
4626 * Same behaviour av_fast_malloc but the buffer has additional
|
|
|
4627 * FF_INPUT_BUFFER_PADDING_SIZE at the end which will will always be 0.
|
|
|
4628 *
|
|
|
4629 * In addition the whole buffer will initially and after resizes
|
|
|
4630 * be 0-initialized so that no uninitialized data will ever appear.
|
|
|
4631 */
|
|
|
4632 void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size);
|
|
|
4633
|
|
|
4634 /**
|
|
|
4635 * Same behaviour av_fast_padded_malloc except that buffer will always
|
|
|
4636 * be 0-initialized after call.
|
|
|
4637 */
|
|
|
4638 void av_fast_padded_mallocz(void *ptr, unsigned int *size, size_t min_size);
|
|
|
4639
|
|
|
4640 /**
|
|
|
4641 * Encode extradata length to a buffer. Used by xiph codecs.
|
|
|
4642 *
|
|
|
4643 * @param s buffer to write to; must be at least (v/255+1) bytes long
|
|
|
4644 * @param v size of extradata in bytes
|
|
|
4645 * @return number of bytes written to the buffer.
|
|
|
4646 */
|
|
|
4647 unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
|
|
|
4648
|
|
|
4649 #if FF_API_MISSING_SAMPLE
|
|
|
4650 /**
|
|
|
4651 * Log a generic warning message about a missing feature. This function is
|
|
|
4652 * intended to be used internally by FFmpeg (libavcodec, libavformat, etc.)
|
|
|
4653 * only, and would normally not be used by applications.
|
|
|
4654 * @param[in] avc a pointer to an arbitrary struct of which the first field is
|
|
|
4655 * a pointer to an AVClass struct
|
|
|
4656 * @param[in] feature string containing the name of the missing feature
|
|
|
4657 * @param[in] want_sample indicates if samples are wanted which exhibit this feature.
|
|
|
4658 * If want_sample is non-zero, additional verbage will be added to the log
|
|
|
4659 * message which tells the user how to report samples to the development
|
|
|
4660 * mailing list.
|
|
|
4661 * @deprecated Use avpriv_report_missing_feature() instead.
|
|
|
4662 */
|
|
|
4663 attribute_deprecated
|
|
|
4664 void av_log_missing_feature(void *avc, const char *feature, int want_sample);
|
|
|
4665
|
|
|
4666 /**
|
|
|
4667 * Log a generic warning message asking for a sample. This function is
|
|
|
4668 * intended to be used internally by FFmpeg (libavcodec, libavformat, etc.)
|
|
|
4669 * only, and would normally not be used by applications.
|
|
|
4670 * @param[in] avc a pointer to an arbitrary struct of which the first field is
|
|
|
4671 * a pointer to an AVClass struct
|
|
|
4672 * @param[in] msg string containing an optional message, or NULL if no message
|
|
|
4673 * @deprecated Use avpriv_request_sample() instead.
|
|
|
4674 */
|
|
|
4675 attribute_deprecated
|
|
|
4676 void av_log_ask_for_sample(void *avc, const char *msg, ...) av_printf_format(2, 3);
|
|
|
4677 #endif /* FF_API_MISSING_SAMPLE */
|
|
|
4678
|
|
|
4679 /**
|
|
|
4680 * Register the hardware accelerator hwaccel.
|
|
|
4681 */
|
|
|
4682 void av_register_hwaccel(AVHWAccel *hwaccel);
|
|
|
4683
|
|
|
4684 /**
|
|
|
4685 * If hwaccel is NULL, returns the first registered hardware accelerator,
|
|
|
4686 * if hwaccel is non-NULL, returns the next registered hardware accelerator
|
|
|
4687 * after hwaccel, or NULL if hwaccel is the last one.
|
|
|
4688 */
|
|
|
4689 AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel);
|
|
|
4690
|
|
|
4691
|
|
|
4692 /**
|
|
|
4693 * Lock operation used by lockmgr
|
|
|
4694 */
|
|
|
4695 enum AVLockOp {
|
|
|
4696 AV_LOCK_CREATE, ///< Create a mutex
|
|
|
4697 AV_LOCK_OBTAIN, ///< Lock the mutex
|
|
|
4698 AV_LOCK_RELEASE, ///< Unlock the mutex
|
|
|
4699 AV_LOCK_DESTROY, ///< Free mutex resources
|
|
|
4700 };
|
|
|
4701
|
|
|
4702 /**
|
|
|
4703 * Register a user provided lock manager supporting the operations
|
|
|
4704 * specified by AVLockOp. mutex points to a (void *) where the
|
|
|
4705 * lockmgr should store/get a pointer to a user allocated mutex. It's
|
|
|
4706 * NULL upon AV_LOCK_CREATE and != NULL for all other ops.
|
|
|
4707 *
|
|
|
4708 * @param cb User defined callback. Note: FFmpeg may invoke calls to this
|
|
|
4709 * callback during the call to av_lockmgr_register().
|
|
|
4710 * Thus, the application must be prepared to handle that.
|
|
|
4711 * If cb is set to NULL the lockmgr will be unregistered.
|
|
|
4712 * Also note that during unregistration the previously registered
|
|
|
4713 * lockmgr callback may also be invoked.
|
|
|
4714 */
|
|
|
4715 int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op));
|
|
|
4716
|
|
|
4717 /**
|
|
|
4718 * Get the type of the given codec.
|
|
|
4719 */
|
|
|
4720 enum AVMediaType avcodec_get_type(enum AVCodecID codec_id);
|
|
|
4721
|
|
|
4722 /**
|
|
|
4723 * Get the name of a codec.
|
|
|
4724 * @return a static string identifying the codec; never NULL
|
|
|
4725 */
|
|
|
4726 const char *avcodec_get_name(enum AVCodecID id);
|
|
|
4727
|
|
|
4728 /**
|
|
|
4729 * @return a positive value if s is open (i.e. avcodec_open2() was called on it
|
|
|
4730 * with no corresponding avcodec_close()), 0 otherwise.
|
|
|
4731 */
|
|
|
4732 int avcodec_is_open(AVCodecContext *s);
|
|
|
4733
|
|
|
4734 /**
|
|
|
4735 * @return a non-zero number if codec is an encoder, zero otherwise
|
|
|
4736 */
|
|
|
4737 int av_codec_is_encoder(const AVCodec *codec);
|
|
|
4738
|
|
|
4739 /**
|
|
|
4740 * @return a non-zero number if codec is a decoder, zero otherwise
|
|
|
4741 */
|
|
|
4742 int av_codec_is_decoder(const AVCodec *codec);
|
|
|
4743
|
|
|
4744 /**
|
|
|
4745 * @return descriptor for given codec ID or NULL if no descriptor exists.
|
|
|
4746 */
|
|
|
4747 const AVCodecDescriptor *avcodec_descriptor_get(enum AVCodecID id);
|
|
|
4748
|
|
|
4749 /**
|
|
|
4750 * Iterate over all codec descriptors known to libavcodec.
|
|
|
4751 *
|
|
|
4752 * @param prev previous descriptor. NULL to get the first descriptor.
|
|
|
4753 *
|
|
|
4754 * @return next descriptor or NULL after the last descriptor
|
|
|
4755 */
|
|
|
4756 const AVCodecDescriptor *avcodec_descriptor_next(const AVCodecDescriptor *prev);
|
|
|
4757
|
|
|
4758 /**
|
|
|
4759 * @return codec descriptor with the given name or NULL if no such descriptor
|
|
|
4760 * exists.
|
|
|
4761 */
|
|
|
4762 const AVCodecDescriptor *avcodec_descriptor_get_by_name(const char *name);
|
|
|
4763
|
|
|
4764 /**
|
|
|
4765 * @}
|
|
|
4766 */
|
|
|
4767
|
|
|
4768 #endif /* AVCODEC_AVCODEC_H */
|
