| 1 | /* |
| 2 | * copyright (c) 2001 Fabrice Bellard |
| 3 | * |
| 4 | * This file is part of FFmpeg. |
| 5 | * |
| 6 | * FFmpeg is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2.1 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * FFmpeg is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
| 17 | * License along with FFmpeg; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 19 | */ |
| 20 | |
| 21 | #ifndef AVCODEC_AVCODEC_H |
| 22 | #define AVCODEC_AVCODEC_H |
| 23 | |
| 24 | /** |
| 25 | * @file |
| 26 | * @ingroup libavc |
| 27 | * Libavcodec external API header |
| 28 | */ |
| 29 | |
| 30 | #include <errno.h> |
| 31 | #include "libavutil/samplefmt.h" |
| 32 | #include "libavutil/attributes.h" |
| 33 | #include "libavutil/avutil.h" |
| 34 | #include "libavutil/buffer.h" |
| 35 | #include "libavutil/cpu.h" |
| 36 | #include "libavutil/channel_layout.h" |
| 37 | #include "libavutil/dict.h" |
| 38 | #include "libavutil/frame.h" |
| 39 | #include "libavutil/log.h" |
| 40 | #include "libavutil/pixfmt.h" |
| 41 | #include "libavutil/rational.h" |
| 42 | |
| 43 | #include "version.h" |
| 44 | |
| 45 | #if FF_API_FAST_MALLOC |
| 46 | // to provide fast_*alloc |
| 47 | #include "libavutil/mem.h" |
| 48 | #endif |
| 49 | |
| 50 | /** |
| 51 | * @defgroup libavc Encoding/Decoding Library |
| 52 | * @{ |
| 53 | * |
| 54 | * @defgroup lavc_decoding Decoding |
| 55 | * @{ |
| 56 | * @} |
| 57 | * |
| 58 | * @defgroup lavc_encoding Encoding |
| 59 | * @{ |
| 60 | * @} |
| 61 | * |
| 62 | * @defgroup lavc_codec Codecs |
| 63 | * @{ |
| 64 | * @defgroup lavc_codec_native Native Codecs |
| 65 | * @{ |
| 66 | * @} |
| 67 | * @defgroup lavc_codec_wrappers External library wrappers |
| 68 | * @{ |
| 69 | * @} |
| 70 | * @defgroup lavc_codec_hwaccel Hardware Accelerators bridge |
| 71 | * @{ |
| 72 | * @} |
| 73 | * @} |
| 74 | * @defgroup lavc_internal Internal |
| 75 | * @{ |
| 76 | * @} |
| 77 | * @} |
| 78 | * |
| 79 | */ |
| 80 | |
| 81 | /** |
| 82 | * @defgroup lavc_core Core functions/structures. |
| 83 | * @ingroup libavc |
| 84 | * |
| 85 | * Basic definitions, functions for querying libavcodec capabilities, |
| 86 | * allocating core structures, etc. |
| 87 | * @{ |
| 88 | */ |
| 89 | |
| 90 | |
| 91 | /** |
| 92 | * Identify the syntax and semantics of the bitstream. |
| 93 | * The principle is roughly: |
| 94 | * Two decoders with the same ID can decode the same streams. |
| 95 | * Two encoders with the same ID can encode compatible streams. |
| 96 | * There may be slight deviations from the principle due to implementation |
| 97 | * details. |
| 98 | * |
| 99 | * If you add a codec ID to this list, add it so that |
| 100 | * 1. no value of a existing codec ID changes (that would break ABI), |
| 101 | * 2. Give it a value which when taken as ASCII is recognized uniquely by a human as this specific codec. |
| 102 | * This ensures that 2 forks can independently add AVCodecIDs without producing conflicts. |
| 103 | * |
| 104 | * After adding new codec IDs, do not forget to add an entry to the codec |
| 105 | * descriptor list and bump libavcodec minor version. |
| 106 | */ |
| 107 | enum AVCodecID { |
| 108 | AV_CODEC_ID_NONE, |
| 109 | |
| 110 | /* video codecs */ |
| 111 | AV_CODEC_ID_MPEG1VIDEO, |
| 112 | AV_CODEC_ID_MPEG2VIDEO, ///< preferred ID for MPEG-1/2 video decoding |
| 113 | #if FF_API_XVMC |
| 114 | AV_CODEC_ID_MPEG2VIDEO_XVMC, |
| 115 | #endif /* FF_API_XVMC */ |
| 116 | AV_CODEC_ID_H261, |
| 117 | AV_CODEC_ID_H263, |
| 118 | AV_CODEC_ID_RV10, |
| 119 | AV_CODEC_ID_RV20, |
| 120 | AV_CODEC_ID_MJPEG, |
| 121 | AV_CODEC_ID_MJPEGB, |
| 122 | AV_CODEC_ID_LJPEG, |
| 123 | AV_CODEC_ID_SP5X, |
| 124 | AV_CODEC_ID_JPEGLS, |
| 125 | AV_CODEC_ID_MPEG4, |
| 126 | AV_CODEC_ID_RAWVIDEO, |
| 127 | AV_CODEC_ID_MSMPEG4V1, |
| 128 | AV_CODEC_ID_MSMPEG4V2, |
| 129 | AV_CODEC_ID_MSMPEG4V3, |
| 130 | AV_CODEC_ID_WMV1, |
| 131 | AV_CODEC_ID_WMV2, |
| 132 | AV_CODEC_ID_H263P, |
| 133 | AV_CODEC_ID_H263I, |
| 134 | AV_CODEC_ID_FLV1, |
| 135 | AV_CODEC_ID_SVQ1, |
| 136 | AV_CODEC_ID_SVQ3, |
| 137 | AV_CODEC_ID_DVVIDEO, |
| 138 | AV_CODEC_ID_HUFFYUV, |
| 139 | AV_CODEC_ID_CYUV, |
| 140 | AV_CODEC_ID_H264, |
| 141 | AV_CODEC_ID_INDEO3, |
| 142 | AV_CODEC_ID_VP3, |
| 143 | AV_CODEC_ID_THEORA, |
| 144 | AV_CODEC_ID_ASV1, |
| 145 | AV_CODEC_ID_ASV2, |
| 146 | AV_CODEC_ID_FFV1, |
| 147 | AV_CODEC_ID_4XM, |
| 148 | AV_CODEC_ID_VCR1, |
| 149 | AV_CODEC_ID_CLJR, |
| 150 | AV_CODEC_ID_MDEC, |
| 151 | AV_CODEC_ID_ROQ, |
| 152 | AV_CODEC_ID_INTERPLAY_VIDEO, |
| 153 | AV_CODEC_ID_XAN_WC3, |
| 154 | AV_CODEC_ID_XAN_WC4, |
| 155 | AV_CODEC_ID_RPZA, |
| 156 | AV_CODEC_ID_CINEPAK, |
| 157 | AV_CODEC_ID_WS_VQA, |
| 158 | AV_CODEC_ID_MSRLE, |
| 159 | AV_CODEC_ID_MSVIDEO1, |
| 160 | AV_CODEC_ID_IDCIN, |
| 161 | AV_CODEC_ID_8BPS, |
| 162 | AV_CODEC_ID_SMC, |
| 163 | AV_CODEC_ID_FLIC, |
| 164 | AV_CODEC_ID_TRUEMOTION1, |
| 165 | AV_CODEC_ID_VMDVIDEO, |
| 166 | AV_CODEC_ID_MSZH, |
| 167 | AV_CODEC_ID_ZLIB, |
| 168 | AV_CODEC_ID_QTRLE, |
| 169 | AV_CODEC_ID_TSCC, |
| 170 | AV_CODEC_ID_ULTI, |
| 171 | AV_CODEC_ID_QDRAW, |
| 172 | AV_CODEC_ID_VIXL, |
| 173 | AV_CODEC_ID_QPEG, |
| 174 | AV_CODEC_ID_PNG, |
| 175 | AV_CODEC_ID_PPM, |
| 176 | AV_CODEC_ID_PBM, |
| 177 | AV_CODEC_ID_PGM, |
| 178 | AV_CODEC_ID_PGMYUV, |
| 179 | AV_CODEC_ID_PAM, |
| 180 | AV_CODEC_ID_FFVHUFF, |
| 181 | AV_CODEC_ID_RV30, |
| 182 | AV_CODEC_ID_RV40, |
| 183 | AV_CODEC_ID_VC1, |
| 184 | AV_CODEC_ID_WMV3, |
| 185 | AV_CODEC_ID_LOCO, |
| 186 | AV_CODEC_ID_WNV1, |
| 187 | AV_CODEC_ID_AASC, |
| 188 | AV_CODEC_ID_INDEO2, |
| 189 | AV_CODEC_ID_FRAPS, |
| 190 | AV_CODEC_ID_TRUEMOTION2, |
| 191 | AV_CODEC_ID_BMP, |
| 192 | AV_CODEC_ID_CSCD, |
| 193 | AV_CODEC_ID_MMVIDEO, |
| 194 | AV_CODEC_ID_ZMBV, |
| 195 | AV_CODEC_ID_AVS, |
| 196 | AV_CODEC_ID_SMACKVIDEO, |
| 197 | AV_CODEC_ID_NUV, |
| 198 | AV_CODEC_ID_KMVC, |
| 199 | AV_CODEC_ID_FLASHSV, |
| 200 | AV_CODEC_ID_CAVS, |
| 201 | AV_CODEC_ID_JPEG2000, |
| 202 | AV_CODEC_ID_VMNC, |
| 203 | AV_CODEC_ID_VP5, |
| 204 | AV_CODEC_ID_VP6, |
| 205 | AV_CODEC_ID_VP6F, |
| 206 | AV_CODEC_ID_TARGA, |
| 207 | AV_CODEC_ID_DSICINVIDEO, |
| 208 | AV_CODEC_ID_TIERTEXSEQVIDEO, |
| 209 | AV_CODEC_ID_TIFF, |
| 210 | AV_CODEC_ID_GIF, |
| 211 | AV_CODEC_ID_DXA, |
| 212 | AV_CODEC_ID_DNXHD, |
| 213 | AV_CODEC_ID_THP, |
| 214 | AV_CODEC_ID_SGI, |
| 215 | AV_CODEC_ID_C93, |
| 216 | AV_CODEC_ID_BETHSOFTVID, |
| 217 | AV_CODEC_ID_PTX, |
| 218 | AV_CODEC_ID_TXD, |
| 219 | AV_CODEC_ID_VP6A, |
| 220 | AV_CODEC_ID_AMV, |
| 221 | AV_CODEC_ID_VB, |
| 222 | AV_CODEC_ID_PCX, |
| 223 | AV_CODEC_ID_SUNRAST, |
| 224 | AV_CODEC_ID_INDEO4, |
| 225 | AV_CODEC_ID_INDEO5, |
| 226 | AV_CODEC_ID_MIMIC, |
| 227 | AV_CODEC_ID_RL2, |
| 228 | AV_CODEC_ID_ESCAPE124, |
| 229 | AV_CODEC_ID_DIRAC, |
| 230 | AV_CODEC_ID_BFI, |
| 231 | AV_CODEC_ID_CMV, |
| 232 | AV_CODEC_ID_MOTIONPIXELS, |
| 233 | AV_CODEC_ID_TGV, |
| 234 | AV_CODEC_ID_TGQ, |
| 235 | AV_CODEC_ID_TQI, |
| 236 | AV_CODEC_ID_AURA, |
| 237 | AV_CODEC_ID_AURA2, |
| 238 | AV_CODEC_ID_V210X, |
| 239 | AV_CODEC_ID_TMV, |
| 240 | AV_CODEC_ID_V210, |
| 241 | AV_CODEC_ID_DPX, |
| 242 | AV_CODEC_ID_MAD, |
| 243 | AV_CODEC_ID_FRWU, |
| 244 | AV_CODEC_ID_FLASHSV2, |
| 245 | AV_CODEC_ID_CDGRAPHICS, |
| 246 | AV_CODEC_ID_R210, |
| 247 | AV_CODEC_ID_ANM, |
| 248 | AV_CODEC_ID_BINKVIDEO, |
| 249 | AV_CODEC_ID_IFF_ILBM, |
| 250 | AV_CODEC_ID_IFF_BYTERUN1, |
| 251 | AV_CODEC_ID_KGV1, |
| 252 | AV_CODEC_ID_YOP, |
| 253 | AV_CODEC_ID_VP8, |
| 254 | AV_CODEC_ID_PICTOR, |
| 255 | AV_CODEC_ID_ANSI, |
| 256 | AV_CODEC_ID_A64_MULTI, |
| 257 | AV_CODEC_ID_A64_MULTI5, |
| 258 | AV_CODEC_ID_R10K, |
| 259 | AV_CODEC_ID_MXPEG, |
| 260 | AV_CODEC_ID_LAGARITH, |
| 261 | AV_CODEC_ID_PRORES, |
| 262 | AV_CODEC_ID_JV, |
| 263 | AV_CODEC_ID_DFA, |
| 264 | AV_CODEC_ID_WMV3IMAGE, |
| 265 | AV_CODEC_ID_VC1IMAGE, |
| 266 | AV_CODEC_ID_UTVIDEO, |
| 267 | AV_CODEC_ID_BMV_VIDEO, |
| 268 | AV_CODEC_ID_VBLE, |
| 269 | AV_CODEC_ID_DXTORY, |
| 270 | AV_CODEC_ID_V410, |
| 271 | AV_CODEC_ID_XWD, |
| 272 | AV_CODEC_ID_CDXL, |
| 273 | AV_CODEC_ID_XBM, |
| 274 | AV_CODEC_ID_ZEROCODEC, |
| 275 | AV_CODEC_ID_MSS1, |
| 276 | AV_CODEC_ID_MSA1, |
| 277 | AV_CODEC_ID_TSCC2, |
| 278 | AV_CODEC_ID_MTS2, |
| 279 | AV_CODEC_ID_CLLC, |
| 280 | AV_CODEC_ID_MSS2, |
| 281 | AV_CODEC_ID_VP9, |
| 282 | AV_CODEC_ID_AIC, |
| 283 | AV_CODEC_ID_ESCAPE130_DEPRECATED, |
| 284 | AV_CODEC_ID_G2M_DEPRECATED, |
| 285 | AV_CODEC_ID_WEBP_DEPRECATED, |
| 286 | AV_CODEC_ID_HNM4_VIDEO, |
| 287 | AV_CODEC_ID_HEVC_DEPRECATED, |
| 288 | AV_CODEC_ID_FIC, |
| 289 | AV_CODEC_ID_ALIAS_PIX, |
| 290 | AV_CODEC_ID_BRENDER_PIX_DEPRECATED, |
| 291 | AV_CODEC_ID_PAF_VIDEO_DEPRECATED, |
| 292 | AV_CODEC_ID_EXR_DEPRECATED, |
| 293 | AV_CODEC_ID_VP7_DEPRECATED, |
| 294 | AV_CODEC_ID_SANM_DEPRECATED, |
| 295 | AV_CODEC_ID_SGIRLE_DEPRECATED, |
| 296 | AV_CODEC_ID_MVC1_DEPRECATED, |
| 297 | AV_CODEC_ID_MVC2_DEPRECATED, |
| 298 | |
| 299 | AV_CODEC_ID_BRENDER_PIX= MKBETAG('B','P','I','X'), |
| 300 | AV_CODEC_ID_Y41P = MKBETAG('Y','4','1','P'), |
| 301 | AV_CODEC_ID_ESCAPE130 = MKBETAG('E','1','3','0'), |
| 302 | AV_CODEC_ID_EXR = MKBETAG('0','E','X','R'), |
| 303 | AV_CODEC_ID_AVRP = MKBETAG('A','V','R','P'), |
| 304 | |
| 305 | AV_CODEC_ID_012V = MKBETAG('0','1','2','V'), |
| 306 | AV_CODEC_ID_G2M = MKBETAG( 0 ,'G','2','M'), |
| 307 | AV_CODEC_ID_AVUI = MKBETAG('A','V','U','I'), |
| 308 | AV_CODEC_ID_AYUV = MKBETAG('A','Y','U','V'), |
| 309 | AV_CODEC_ID_TARGA_Y216 = MKBETAG('T','2','1','6'), |
| 310 | AV_CODEC_ID_V308 = MKBETAG('V','3','0','8'), |
| 311 | AV_CODEC_ID_V408 = MKBETAG('V','4','0','8'), |
| 312 | AV_CODEC_ID_YUV4 = MKBETAG('Y','U','V','4'), |
| 313 | AV_CODEC_ID_SANM = MKBETAG('S','A','N','M'), |
| 314 | AV_CODEC_ID_PAF_VIDEO = MKBETAG('P','A','F','V'), |
| 315 | AV_CODEC_ID_AVRN = MKBETAG('A','V','R','n'), |
| 316 | AV_CODEC_ID_CPIA = MKBETAG('C','P','I','A'), |
| 317 | AV_CODEC_ID_XFACE = MKBETAG('X','F','A','C'), |
| 318 | AV_CODEC_ID_SGIRLE = MKBETAG('S','G','I','R'), |
| 319 | AV_CODEC_ID_MVC1 = MKBETAG('M','V','C','1'), |
| 320 | AV_CODEC_ID_MVC2 = MKBETAG('M','V','C','2'), |
| 321 | AV_CODEC_ID_SNOW = MKBETAG('S','N','O','W'), |
| 322 | AV_CODEC_ID_WEBP = MKBETAG('W','E','B','P'), |
| 323 | AV_CODEC_ID_SMVJPEG = MKBETAG('S','M','V','J'), |
| 324 | AV_CODEC_ID_HEVC = MKBETAG('H','2','6','5'), |
| 325 | #define AV_CODEC_ID_H265 AV_CODEC_ID_HEVC |
| 326 | AV_CODEC_ID_VP7 = MKBETAG('V','P','7','0'), |
| 327 | |
| 328 | /* various PCM "codecs" */ |
| 329 | AV_CODEC_ID_FIRST_AUDIO = 0x10000, ///< A dummy id pointing at the start of audio codecs |
| 330 | AV_CODEC_ID_PCM_S16LE = 0x10000, |
| 331 | AV_CODEC_ID_PCM_S16BE, |
| 332 | AV_CODEC_ID_PCM_U16LE, |
| 333 | AV_CODEC_ID_PCM_U16BE, |
| 334 | AV_CODEC_ID_PCM_S8, |
| 335 | AV_CODEC_ID_PCM_U8, |
| 336 | AV_CODEC_ID_PCM_MULAW, |
| 337 | AV_CODEC_ID_PCM_ALAW, |
| 338 | AV_CODEC_ID_PCM_S32LE, |
| 339 | AV_CODEC_ID_PCM_S32BE, |
| 340 | AV_CODEC_ID_PCM_U32LE, |
| 341 | AV_CODEC_ID_PCM_U32BE, |
| 342 | AV_CODEC_ID_PCM_S24LE, |
| 343 | AV_CODEC_ID_PCM_S24BE, |
| 344 | AV_CODEC_ID_PCM_U24LE, |
| 345 | AV_CODEC_ID_PCM_U24BE, |
| 346 | AV_CODEC_ID_PCM_S24DAUD, |
| 347 | AV_CODEC_ID_PCM_ZORK, |
| 348 | AV_CODEC_ID_PCM_S16LE_PLANAR, |
| 349 | AV_CODEC_ID_PCM_DVD, |
| 350 | AV_CODEC_ID_PCM_F32BE, |
| 351 | AV_CODEC_ID_PCM_F32LE, |
| 352 | AV_CODEC_ID_PCM_F64BE, |
| 353 | AV_CODEC_ID_PCM_F64LE, |
| 354 | AV_CODEC_ID_PCM_BLURAY, |
| 355 | AV_CODEC_ID_PCM_LXF, |
| 356 | AV_CODEC_ID_S302M, |
| 357 | AV_CODEC_ID_PCM_S8_PLANAR, |
| 358 | AV_CODEC_ID_PCM_S24LE_PLANAR_DEPRECATED, |
| 359 | AV_CODEC_ID_PCM_S32LE_PLANAR_DEPRECATED, |
| 360 | AV_CODEC_ID_PCM_S24LE_PLANAR = MKBETAG(24,'P','S','P'), |
| 361 | AV_CODEC_ID_PCM_S32LE_PLANAR = MKBETAG(32,'P','S','P'), |
| 362 | AV_CODEC_ID_PCM_S16BE_PLANAR = MKBETAG('P','S','P',16), |
| 363 | |
| 364 | /* various ADPCM codecs */ |
| 365 | AV_CODEC_ID_ADPCM_IMA_QT = 0x11000, |
| 366 | AV_CODEC_ID_ADPCM_IMA_WAV, |
| 367 | AV_CODEC_ID_ADPCM_IMA_DK3, |
| 368 | AV_CODEC_ID_ADPCM_IMA_DK4, |
| 369 | AV_CODEC_ID_ADPCM_IMA_WS, |
| 370 | AV_CODEC_ID_ADPCM_IMA_SMJPEG, |
| 371 | AV_CODEC_ID_ADPCM_MS, |
| 372 | AV_CODEC_ID_ADPCM_4XM, |
| 373 | AV_CODEC_ID_ADPCM_XA, |
| 374 | AV_CODEC_ID_ADPCM_ADX, |
| 375 | AV_CODEC_ID_ADPCM_EA, |
| 376 | AV_CODEC_ID_ADPCM_G726, |
| 377 | AV_CODEC_ID_ADPCM_CT, |
| 378 | AV_CODEC_ID_ADPCM_SWF, |
| 379 | AV_CODEC_ID_ADPCM_YAMAHA, |
| 380 | AV_CODEC_ID_ADPCM_SBPRO_4, |
| 381 | AV_CODEC_ID_ADPCM_SBPRO_3, |
| 382 | AV_CODEC_ID_ADPCM_SBPRO_2, |
| 383 | AV_CODEC_ID_ADPCM_THP, |
| 384 | AV_CODEC_ID_ADPCM_IMA_AMV, |
| 385 | AV_CODEC_ID_ADPCM_EA_R1, |
| 386 | AV_CODEC_ID_ADPCM_EA_R3, |
| 387 | AV_CODEC_ID_ADPCM_EA_R2, |
| 388 | AV_CODEC_ID_ADPCM_IMA_EA_SEAD, |
| 389 | AV_CODEC_ID_ADPCM_IMA_EA_EACS, |
| 390 | AV_CODEC_ID_ADPCM_EA_XAS, |
| 391 | AV_CODEC_ID_ADPCM_EA_MAXIS_XA, |
| 392 | AV_CODEC_ID_ADPCM_IMA_ISS, |
| 393 | AV_CODEC_ID_ADPCM_G722, |
| 394 | AV_CODEC_ID_ADPCM_IMA_APC, |
| 395 | AV_CODEC_ID_ADPCM_VIMA_DEPRECATED, |
| 396 | AV_CODEC_ID_ADPCM_VIMA = MKBETAG('V','I','M','A'), |
| 397 | AV_CODEC_ID_VIMA = MKBETAG('V','I','M','A'), |
| 398 | AV_CODEC_ID_ADPCM_AFC = MKBETAG('A','F','C',' '), |
| 399 | AV_CODEC_ID_ADPCM_IMA_OKI = MKBETAG('O','K','I',' '), |
| 400 | AV_CODEC_ID_ADPCM_DTK = MKBETAG('D','T','K',' '), |
| 401 | AV_CODEC_ID_ADPCM_IMA_RAD = MKBETAG('R','A','D',' '), |
| 402 | AV_CODEC_ID_ADPCM_G726LE = MKBETAG('6','2','7','G'), |
| 403 | |
| 404 | /* AMR */ |
| 405 | AV_CODEC_ID_AMR_NB = 0x12000, |
| 406 | AV_CODEC_ID_AMR_WB, |
| 407 | |
| 408 | /* RealAudio codecs*/ |
| 409 | AV_CODEC_ID_RA_144 = 0x13000, |
| 410 | AV_CODEC_ID_RA_288, |
| 411 | |
| 412 | /* various DPCM codecs */ |
| 413 | AV_CODEC_ID_ROQ_DPCM = 0x14000, |
| 414 | AV_CODEC_ID_INTERPLAY_DPCM, |
| 415 | AV_CODEC_ID_XAN_DPCM, |
| 416 | AV_CODEC_ID_SOL_DPCM, |
| 417 | |
| 418 | /* audio codecs */ |
| 419 | AV_CODEC_ID_MP2 = 0x15000, |
| 420 | AV_CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3 |
| 421 | AV_CODEC_ID_AAC, |
| 422 | AV_CODEC_ID_AC3, |
| 423 | AV_CODEC_ID_DTS, |
| 424 | AV_CODEC_ID_VORBIS, |
| 425 | AV_CODEC_ID_DVAUDIO, |
| 426 | AV_CODEC_ID_WMAV1, |
| 427 | AV_CODEC_ID_WMAV2, |
| 428 | AV_CODEC_ID_MACE3, |
| 429 | AV_CODEC_ID_MACE6, |
| 430 | AV_CODEC_ID_VMDAUDIO, |
| 431 | AV_CODEC_ID_FLAC, |
| 432 | AV_CODEC_ID_MP3ADU, |
| 433 | AV_CODEC_ID_MP3ON4, |
| 434 | AV_CODEC_ID_SHORTEN, |
| 435 | AV_CODEC_ID_ALAC, |
| 436 | AV_CODEC_ID_WESTWOOD_SND1, |
| 437 | AV_CODEC_ID_GSM, ///< as in Berlin toast format |
| 438 | AV_CODEC_ID_QDM2, |
| 439 | AV_CODEC_ID_COOK, |
| 440 | AV_CODEC_ID_TRUESPEECH, |
| 441 | AV_CODEC_ID_TTA, |
| 442 | AV_CODEC_ID_SMACKAUDIO, |
| 443 | AV_CODEC_ID_QCELP, |
| 444 | AV_CODEC_ID_WAVPACK, |
| 445 | AV_CODEC_ID_DSICINAUDIO, |
| 446 | AV_CODEC_ID_IMC, |
| 447 | AV_CODEC_ID_MUSEPACK7, |
| 448 | AV_CODEC_ID_MLP, |
| 449 | AV_CODEC_ID_GSM_MS, /* as found in WAV */ |
| 450 | AV_CODEC_ID_ATRAC3, |
| 451 | #if FF_API_VOXWARE |
| 452 | AV_CODEC_ID_VOXWARE, |
| 453 | #endif |
| 454 | AV_CODEC_ID_APE, |
| 455 | AV_CODEC_ID_NELLYMOSER, |
| 456 | AV_CODEC_ID_MUSEPACK8, |
| 457 | AV_CODEC_ID_SPEEX, |
| 458 | AV_CODEC_ID_WMAVOICE, |
| 459 | AV_CODEC_ID_WMAPRO, |
| 460 | AV_CODEC_ID_WMALOSSLESS, |
| 461 | AV_CODEC_ID_ATRAC3P, |
| 462 | AV_CODEC_ID_EAC3, |
| 463 | AV_CODEC_ID_SIPR, |
| 464 | AV_CODEC_ID_MP1, |
| 465 | AV_CODEC_ID_TWINVQ, |
| 466 | AV_CODEC_ID_TRUEHD, |
| 467 | AV_CODEC_ID_MP4ALS, |
| 468 | AV_CODEC_ID_ATRAC1, |
| 469 | AV_CODEC_ID_BINKAUDIO_RDFT, |
| 470 | AV_CODEC_ID_BINKAUDIO_DCT, |
| 471 | AV_CODEC_ID_AAC_LATM, |
| 472 | AV_CODEC_ID_QDMC, |
| 473 | AV_CODEC_ID_CELT, |
| 474 | AV_CODEC_ID_G723_1, |
| 475 | AV_CODEC_ID_G729, |
| 476 | AV_CODEC_ID_8SVX_EXP, |
| 477 | AV_CODEC_ID_8SVX_FIB, |
| 478 | AV_CODEC_ID_BMV_AUDIO, |
| 479 | AV_CODEC_ID_RALF, |
| 480 | AV_CODEC_ID_IAC, |
| 481 | AV_CODEC_ID_ILBC, |
| 482 | AV_CODEC_ID_OPUS_DEPRECATED, |
| 483 | AV_CODEC_ID_COMFORT_NOISE, |
| 484 | AV_CODEC_ID_TAK_DEPRECATED, |
| 485 | AV_CODEC_ID_METASOUND, |
| 486 | AV_CODEC_ID_PAF_AUDIO_DEPRECATED, |
| 487 | AV_CODEC_ID_ON2AVC, |
| 488 | AV_CODEC_ID_FFWAVESYNTH = MKBETAG('F','F','W','S'), |
| 489 | AV_CODEC_ID_SONIC = MKBETAG('S','O','N','C'), |
| 490 | AV_CODEC_ID_SONIC_LS = MKBETAG('S','O','N','L'), |
| 491 | AV_CODEC_ID_PAF_AUDIO = MKBETAG('P','A','F','A'), |
| 492 | AV_CODEC_ID_OPUS = MKBETAG('O','P','U','S'), |
| 493 | AV_CODEC_ID_TAK = MKBETAG('t','B','a','K'), |
| 494 | AV_CODEC_ID_EVRC = MKBETAG('s','e','v','c'), |
| 495 | AV_CODEC_ID_SMV = MKBETAG('s','s','m','v'), |
| 496 | AV_CODEC_ID_DSD_LSBF = MKBETAG('D','S','D','L'), |
| 497 | AV_CODEC_ID_DSD_MSBF = MKBETAG('D','S','D','M'), |
| 498 | AV_CODEC_ID_DSD_LSBF_PLANAR = MKBETAG('D','S','D','1'), |
| 499 | AV_CODEC_ID_DSD_MSBF_PLANAR = MKBETAG('D','S','D','8'), |
| 500 | |
| 501 | /* subtitle codecs */ |
| 502 | AV_CODEC_ID_FIRST_SUBTITLE = 0x17000, ///< A dummy ID pointing at the start of subtitle codecs. |
| 503 | AV_CODEC_ID_DVD_SUBTITLE = 0x17000, |
| 504 | AV_CODEC_ID_DVB_SUBTITLE, |
| 505 | AV_CODEC_ID_TEXT, ///< raw UTF-8 text |
| 506 | AV_CODEC_ID_XSUB, |
| 507 | AV_CODEC_ID_SSA, |
| 508 | AV_CODEC_ID_MOV_TEXT, |
| 509 | AV_CODEC_ID_HDMV_PGS_SUBTITLE, |
| 510 | AV_CODEC_ID_DVB_TELETEXT, |
| 511 | AV_CODEC_ID_SRT, |
| 512 | AV_CODEC_ID_MICRODVD = MKBETAG('m','D','V','D'), |
| 513 | AV_CODEC_ID_EIA_608 = MKBETAG('c','6','0','8'), |
| 514 | AV_CODEC_ID_JACOSUB = MKBETAG('J','S','U','B'), |
| 515 | AV_CODEC_ID_SAMI = MKBETAG('S','A','M','I'), |
| 516 | AV_CODEC_ID_REALTEXT = MKBETAG('R','T','X','T'), |
| 517 | AV_CODEC_ID_SUBVIEWER1 = MKBETAG('S','b','V','1'), |
| 518 | AV_CODEC_ID_SUBVIEWER = MKBETAG('S','u','b','V'), |
| 519 | AV_CODEC_ID_SUBRIP = MKBETAG('S','R','i','p'), |
| 520 | AV_CODEC_ID_WEBVTT = MKBETAG('W','V','T','T'), |
| 521 | AV_CODEC_ID_MPL2 = MKBETAG('M','P','L','2'), |
| 522 | AV_CODEC_ID_VPLAYER = MKBETAG('V','P','l','r'), |
| 523 | AV_CODEC_ID_PJS = MKBETAG('P','h','J','S'), |
| 524 | AV_CODEC_ID_ASS = MKBETAG('A','S','S',' '), ///< ASS as defined in Matroska |
| 525 | |
| 526 | /* other specific kind of codecs (generally used for attachments) */ |
| 527 | AV_CODEC_ID_FIRST_UNKNOWN = 0x18000, ///< A dummy ID pointing at the start of various fake codecs. |
| 528 | AV_CODEC_ID_TTF = 0x18000, |
| 529 | AV_CODEC_ID_BINTEXT = MKBETAG('B','T','X','T'), |
| 530 | AV_CODEC_ID_XBIN = MKBETAG('X','B','I','N'), |
| 531 | AV_CODEC_ID_IDF = MKBETAG( 0 ,'I','D','F'), |
| 532 | AV_CODEC_ID_OTF = MKBETAG( 0 ,'O','T','F'), |
| 533 | AV_CODEC_ID_SMPTE_KLV = MKBETAG('K','L','V','A'), |
| 534 | AV_CODEC_ID_DVD_NAV = MKBETAG('D','N','A','V'), |
| 535 | AV_CODEC_ID_TIMED_ID3 = MKBETAG('T','I','D','3'), |
| 536 | AV_CODEC_ID_BIN_DATA = MKBETAG('D','A','T','A'), |
| 537 | |
| 538 | |
| 539 | AV_CODEC_ID_PROBE = 0x19000, ///< codec_id is not known (like AV_CODEC_ID_NONE) but lavf should attempt to identify it |
| 540 | |
| 541 | AV_CODEC_ID_MPEG2TS = 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS |
| 542 | * stream (only used by libavformat) */ |
| 543 | AV_CODEC_ID_MPEG4SYSTEMS = 0x20001, /**< _FAKE_ codec to indicate a MPEG-4 Systems |
| 544 | * stream (only used by libavformat) */ |
| 545 | AV_CODEC_ID_FFMETADATA = 0x21000, ///< Dummy codec for streams containing only metadata information. |
| 546 | |
| 547 | #if FF_API_CODEC_ID |
| 548 | #include "old_codec_ids.h" |
| 549 | #endif |
| 550 | }; |
| 551 | |
| 552 | /** |
| 553 | * This struct describes the properties of a single codec described by an |
| 554 | * AVCodecID. |
| 555 | * @see avcodec_get_descriptor() |
| 556 | */ |
| 557 | typedef struct AVCodecDescriptor { |
| 558 | enum AVCodecID id; |
| 559 | enum AVMediaType type; |
| 560 | /** |
| 561 | * Name of the codec described by this descriptor. It is non-empty and |
| 562 | * unique for each codec descriptor. It should contain alphanumeric |
| 563 | * characters and '_' only. |
| 564 | */ |
| 565 | const char *name; |
| 566 | /** |
| 567 | * A more descriptive name for this codec. May be NULL. |
| 568 | */ |
| 569 | const char *long_name; |
| 570 | /** |
| 571 | * Codec properties, a combination of AV_CODEC_PROP_* flags. |
| 572 | */ |
| 573 | int props; |
| 574 | |
| 575 | /** |
| 576 | * MIME type(s) associated with the codec. |
| 577 | * May be NULL; if not, a NULL-terminated array of MIME types. |
| 578 | * The first item is always non-NULL and is the preferred MIME type. |
| 579 | */ |
| 580 | const char *const *mime_types; |
| 581 | } AVCodecDescriptor; |
| 582 | |
| 583 | /** |
| 584 | * Codec uses only intra compression. |
| 585 | * Video codecs only. |
| 586 | */ |
| 587 | #define AV_CODEC_PROP_INTRA_ONLY (1 << 0) |
| 588 | /** |
| 589 | * Codec supports lossy compression. Audio and video codecs only. |
| 590 | * @note a codec may support both lossy and lossless |
| 591 | * compression modes |
| 592 | */ |
| 593 | #define AV_CODEC_PROP_LOSSY (1 << 1) |
| 594 | /** |
| 595 | * Codec supports lossless compression. Audio and video codecs only. |
| 596 | */ |
| 597 | #define AV_CODEC_PROP_LOSSLESS (1 << 2) |
| 598 | /** |
| 599 | * Codec supports frame reordering. That is, the coded order (the order in which |
| 600 | * the encoded packets are output by the encoders / stored / input to the |
| 601 | * decoders) may be different from the presentation order of the corresponding |
| 602 | * frames. |
| 603 | * |
| 604 | * For codecs that do not have this property set, PTS and DTS should always be |
| 605 | * equal. |
| 606 | */ |
| 607 | #define AV_CODEC_PROP_REORDER (1 << 3) |
| 608 | /** |
| 609 | * Subtitle codec is bitmap based |
| 610 | * Decoded AVSubtitle data can be read from the AVSubtitleRect->pict field. |
| 611 | */ |
| 612 | #define AV_CODEC_PROP_BITMAP_SUB (1 << 16) |
| 613 | /** |
| 614 | * Subtitle codec is text based. |
| 615 | * Decoded AVSubtitle data can be read from the AVSubtitleRect->ass field. |
| 616 | */ |
| 617 | #define AV_CODEC_PROP_TEXT_SUB (1 << 17) |
| 618 | |
| 619 | /** |
| 620 | * @ingroup lavc_decoding |
| 621 | * Required number of additionally allocated bytes at the end of the input bitstream for decoding. |
| 622 | * This is mainly needed because some optimized bitstream readers read |
| 623 | * 32 or 64 bit at once and could read over the end.<br> |
| 624 | * Note: If the first 23 bits of the additional bytes are not 0, then damaged |
| 625 | * MPEG bitstreams could cause overread and segfault. |
| 626 | */ |
| 627 | #define FF_INPUT_BUFFER_PADDING_SIZE 32 |
| 628 | |
| 629 | /** |
| 630 | * @ingroup lavc_encoding |
| 631 | * minimum encoding buffer size |
| 632 | * Used to avoid some checks during header writing. |
| 633 | */ |
| 634 | #define FF_MIN_BUFFER_SIZE 16384 |
| 635 | |
| 636 | |
| 637 | /** |
| 638 | * @ingroup lavc_encoding |
| 639 | * motion estimation type. |
| 640 | */ |
| 641 | enum Motion_Est_ID { |
| 642 | ME_ZERO = 1, ///< no search, that is use 0,0 vector whenever one is needed |
| 643 | ME_FULL, |
| 644 | ME_LOG, |
| 645 | ME_PHODS, |
| 646 | ME_EPZS, ///< enhanced predictive zonal search |
| 647 | ME_X1, ///< reserved for experiments |
| 648 | ME_HEX, ///< hexagon based search |
| 649 | ME_UMH, ///< uneven multi-hexagon search |
| 650 | ME_TESA, ///< transformed exhaustive search algorithm |
| 651 | ME_ITER=50, ///< iterative search |
| 652 | }; |
| 653 | |
| 654 | /** |
| 655 | * @ingroup lavc_decoding |
| 656 | */ |
| 657 | enum AVDiscard{ |
| 658 | /* We leave some space between them for extensions (drop some |
| 659 | * keyframes for intra-only or drop just some bidir frames). */ |
| 660 | AVDISCARD_NONE =-16, ///< discard nothing |
| 661 | AVDISCARD_DEFAULT = 0, ///< discard useless packets like 0 size packets in avi |
| 662 | AVDISCARD_NONREF = 8, ///< discard all non reference |
| 663 | AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames |
| 664 | AVDISCARD_NONINTRA= 24, ///< discard all non intra frames |
| 665 | AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes |
| 666 | AVDISCARD_ALL = 48, ///< discard all |
| 667 | }; |
| 668 | |
| 669 | enum AVAudioServiceType { |
| 670 | AV_AUDIO_SERVICE_TYPE_MAIN = 0, |
| 671 | AV_AUDIO_SERVICE_TYPE_EFFECTS = 1, |
| 672 | AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED = 2, |
| 673 | AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED = 3, |
| 674 | AV_AUDIO_SERVICE_TYPE_DIALOGUE = 4, |
| 675 | AV_AUDIO_SERVICE_TYPE_COMMENTARY = 5, |
| 676 | AV_AUDIO_SERVICE_TYPE_EMERGENCY = 6, |
| 677 | AV_AUDIO_SERVICE_TYPE_VOICE_OVER = 7, |
| 678 | AV_AUDIO_SERVICE_TYPE_KARAOKE = 8, |
| 679 | AV_AUDIO_SERVICE_TYPE_NB , ///< Not part of ABI |
| 680 | }; |
| 681 | |
| 682 | /** |
| 683 | * @ingroup lavc_encoding |
| 684 | */ |
| 685 | typedef struct RcOverride{ |
| 686 | int start_frame; |
| 687 | int end_frame; |
| 688 | int qscale; // If this is 0 then quality_factor will be used instead. |
| 689 | float quality_factor; |
| 690 | } RcOverride; |
| 691 | |
| 692 | #if FF_API_MAX_BFRAMES |
| 693 | /** |
| 694 | * @deprecated there is no libavcodec-wide limit on the number of B-frames |
| 695 | */ |
| 696 | #define FF_MAX_B_FRAMES 16 |
| 697 | #endif |
| 698 | |
| 699 | /* encoding support |
| 700 | These flags can be passed in AVCodecContext.flags before initialization. |
| 701 | Note: Not everything is supported yet. |
| 702 | */ |
| 703 | |
| 704 | /** |
| 705 | * Allow decoders to produce frames with data planes that are not aligned |
| 706 | * to CPU requirements (e.g. due to cropping). |
| 707 | */ |
| 708 | #define CODEC_FLAG_UNALIGNED 0x0001 |
| 709 | #define CODEC_FLAG_QSCALE 0x0002 ///< Use fixed qscale. |
| 710 | #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / advanced prediction for H.263. |
| 711 | #define CODEC_FLAG_OUTPUT_CORRUPT 0x0008 ///< Output even those frames that might be corrupted |
| 712 | #define CODEC_FLAG_QPEL 0x0010 ///< Use qpel MC. |
| 713 | #if FF_API_GMC |
| 714 | /** |
| 715 | * @deprecated use the "gmc" private option of the libxvid encoder |
| 716 | */ |
| 717 | #define CODEC_FLAG_GMC 0x0020 ///< Use GMC. |
| 718 | #endif |
| 719 | #if FF_API_MV0 |
| 720 | /** |
| 721 | * @deprecated use the flag "mv0" in the "mpv_flags" private option of the |
| 722 | * mpegvideo encoders |
| 723 | */ |
| 724 | #define CODEC_FLAG_MV0 0x0040 |
| 725 | #endif |
| 726 | #if FF_API_INPUT_PRESERVED |
| 727 | /** |
| 728 | * @deprecated passing reference-counted frames to the encoders replaces this |
| 729 | * flag |
| 730 | */ |
| 731 | #define CODEC_FLAG_INPUT_PRESERVED 0x0100 |
| 732 | #endif |
| 733 | #define CODEC_FLAG_PASS1 0x0200 ///< Use internal 2pass ratecontrol in first pass mode. |
| 734 | #define CODEC_FLAG_PASS2 0x0400 ///< Use internal 2pass ratecontrol in second pass mode. |
| 735 | #define CODEC_FLAG_GRAY 0x2000 ///< Only decode/encode grayscale. |
| 736 | #if FF_API_EMU_EDGE |
| 737 | /** |
| 738 | * @deprecated edges are not used/required anymore. I.e. this flag is now always |
| 739 | * set. |
| 740 | */ |
| 741 | #define CODEC_FLAG_EMU_EDGE 0x4000 |
| 742 | #endif |
| 743 | #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding. |
| 744 | #define CODEC_FLAG_TRUNCATED 0x00010000 /** Input bitstream might be truncated at a random |
| 745 | location instead of only at frame boundaries. */ |
| 746 | #if FF_API_NORMALIZE_AQP |
| 747 | /** |
| 748 | * @deprecated use the flag "naq" in the "mpv_flags" private option of the |
| 749 | * mpegvideo encoders |
| 750 | */ |
| 751 | #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 |
| 752 | #endif |
| 753 | #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT. |
| 754 | #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< Force low delay. |
| 755 | #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< Place global headers in extradata instead of every keyframe. |
| 756 | #define CODEC_FLAG_BITEXACT 0x00800000 ///< Use only bitexact stuff (except (I)DCT). |
| 757 | /* Fx : Flag for h263+ extra options */ |
| 758 | #define CODEC_FLAG_AC_PRED 0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction |
| 759 | #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter |
| 760 | #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation |
| 761 | #define CODEC_FLAG_CLOSED_GOP 0x80000000 |
| 762 | #define CODEC_FLAG2_FAST 0x00000001 ///< Allow non spec compliant speedup tricks. |
| 763 | #define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< Skip bitstream encoding. |
| 764 | #define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< Place global headers at every keyframe instead of in extradata. |
| 765 | #define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format. DEPRECATED!!!! |
| 766 | #define CODEC_FLAG2_IGNORE_CROP 0x00010000 ///< Discard cropping information from SPS. |
| 767 | |
| 768 | #define CODEC_FLAG2_CHUNKS 0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries. |
| 769 | #define CODEC_FLAG2_SHOW_ALL 0x00400000 ///< Show all frames before the first keyframe |
| 770 | #define CODEC_FLAG2_EXPORT_MVS 0x10000000 ///< Export motion vectors through frame side data |
| 771 | |
| 772 | /* Unsupported options : |
| 773 | * Syntax Arithmetic coding (SAC) |
| 774 | * Reference Picture Selection |
| 775 | * Independent Segment Decoding */ |
| 776 | /* /Fx */ |
| 777 | /* codec capabilities */ |
| 778 | |
| 779 | #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback. |
| 780 | /** |
| 781 | * Codec uses get_buffer() for allocating buffers and supports custom allocators. |
| 782 | * If not set, it might not use get_buffer() at all or use operations that |
| 783 | * assume the buffer was allocated by avcodec_default_get_buffer. |
| 784 | */ |
| 785 | #define CODEC_CAP_DR1 0x0002 |
| 786 | #define CODEC_CAP_TRUNCATED 0x0008 |
| 787 | #if FF_API_XVMC |
| 788 | /* Codec can export data for HW decoding. This flag indicates that |
| 789 | * the codec would call get_format() with list that might contain HW accelerated |
| 790 | * pixel formats (XvMC, VDPAU, VAAPI, etc). The application can pick any of them |
| 791 | * including raw image format. |
| 792 | * The application can use the passed context to determine bitstream version, |
| 793 | * chroma format, resolution etc. |
| 794 | */ |
| 795 | #define CODEC_CAP_HWACCEL 0x0010 |
| 796 | #endif /* FF_API_XVMC */ |
| 797 | /** |
| 798 | * Encoder or decoder requires flushing with NULL input at the end in order to |
| 799 | * give the complete and correct output. |
| 800 | * |
| 801 | * NOTE: If this flag is not set, the codec is guaranteed to never be fed with |
| 802 | * with NULL data. The user can still send NULL data to the public encode |
| 803 | * or decode function, but libavcodec will not pass it along to the codec |
| 804 | * unless this flag is set. |
| 805 | * |
| 806 | * Decoders: |
| 807 | * The decoder has a non-zero delay and needs to be fed with avpkt->data=NULL, |
| 808 | * avpkt->size=0 at the end to get the delayed data until the decoder no longer |
| 809 | * returns frames. |
| 810 | * |
| 811 | * Encoders: |
| 812 | * The encoder needs to be fed with NULL data at the end of encoding until the |
| 813 | * encoder no longer returns data. |
| 814 | * |
| 815 | * NOTE: For encoders implementing the AVCodec.encode2() function, setting this |
| 816 | * flag also means that the encoder must set the pts and duration for |
| 817 | * each output packet. If this flag is not set, the pts and duration will |
| 818 | * be determined by libavcodec from the input frame. |
| 819 | */ |
| 820 | #define CODEC_CAP_DELAY 0x0020 |
| 821 | /** |
| 822 | * Codec can be fed a final frame with a smaller size. |
| 823 | * This can be used to prevent truncation of the last audio samples. |
| 824 | */ |
| 825 | #define CODEC_CAP_SMALL_LAST_FRAME 0x0040 |
| 826 | #if FF_API_CAP_VDPAU |
| 827 | /** |
| 828 | * Codec can export data for HW decoding (VDPAU). |
| 829 | */ |
| 830 | #define CODEC_CAP_HWACCEL_VDPAU 0x0080 |
| 831 | #endif |
| 832 | /** |
| 833 | * Codec can output multiple frames per AVPacket |
| 834 | * Normally demuxers return one frame at a time, demuxers which do not do |
| 835 | * are connected to a parser to split what they return into proper frames. |
| 836 | * This flag is reserved to the very rare category of codecs which have a |
| 837 | * bitstream that cannot be split into frames without timeconsuming |
| 838 | * operations like full decoding. Demuxers carring such bitstreams thus |
| 839 | * may return multiple frames in a packet. This has many disadvantages like |
| 840 | * prohibiting stream copy in many cases thus it should only be considered |
| 841 | * as a last resort. |
| 842 | */ |
| 843 | #define CODEC_CAP_SUBFRAMES 0x0100 |
| 844 | /** |
| 845 | * Codec is experimental and is thus avoided in favor of non experimental |
| 846 | * encoders |
| 847 | */ |
| 848 | #define CODEC_CAP_EXPERIMENTAL 0x0200 |
| 849 | /** |
| 850 | * Codec should fill in channel configuration and samplerate instead of container |
| 851 | */ |
| 852 | #define CODEC_CAP_CHANNEL_CONF 0x0400 |
| 853 | #if FF_API_NEG_LINESIZES |
| 854 | /** |
| 855 | * @deprecated no codecs use this capability |
| 856 | */ |
| 857 | #define CODEC_CAP_NEG_LINESIZES 0x0800 |
| 858 | #endif |
| 859 | /** |
| 860 | * Codec supports frame-level multithreading. |
| 861 | */ |
| 862 | #define CODEC_CAP_FRAME_THREADS 0x1000 |
| 863 | /** |
| 864 | * Codec supports slice-based (or partition-based) multithreading. |
| 865 | */ |
| 866 | #define CODEC_CAP_SLICE_THREADS 0x2000 |
| 867 | /** |
| 868 | * Codec supports changed parameters at any point. |
| 869 | */ |
| 870 | #define CODEC_CAP_PARAM_CHANGE 0x4000 |
| 871 | /** |
| 872 | * Codec supports avctx->thread_count == 0 (auto). |
| 873 | */ |
| 874 | #define CODEC_CAP_AUTO_THREADS 0x8000 |
| 875 | /** |
| 876 | * Audio encoder supports receiving a different number of samples in each call. |
| 877 | */ |
| 878 | #define CODEC_CAP_VARIABLE_FRAME_SIZE 0x10000 |
| 879 | /** |
| 880 | * Codec is intra only. |
| 881 | */ |
| 882 | #define CODEC_CAP_INTRA_ONLY 0x40000000 |
| 883 | /** |
| 884 | * Codec is lossless. |
| 885 | */ |
| 886 | #define CODEC_CAP_LOSSLESS 0x80000000 |
| 887 | |
| 888 | #if FF_API_MB_TYPE |
| 889 | //The following defines may change, don't expect compatibility if you use them. |
| 890 | #define MB_TYPE_INTRA4x4 0x0001 |
| 891 | #define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific |
| 892 | #define MB_TYPE_INTRA_PCM 0x0004 //FIXME H.264-specific |
| 893 | #define MB_TYPE_16x16 0x0008 |
| 894 | #define MB_TYPE_16x8 0x0010 |
| 895 | #define MB_TYPE_8x16 0x0020 |
| 896 | #define MB_TYPE_8x8 0x0040 |
| 897 | #define MB_TYPE_INTERLACED 0x0080 |
| 898 | #define MB_TYPE_DIRECT2 0x0100 //FIXME |
| 899 | #define MB_TYPE_ACPRED 0x0200 |
| 900 | #define MB_TYPE_GMC 0x0400 |
| 901 | #define MB_TYPE_SKIP 0x0800 |
| 902 | #define MB_TYPE_P0L0 0x1000 |
| 903 | #define MB_TYPE_P1L0 0x2000 |
| 904 | #define MB_TYPE_P0L1 0x4000 |
| 905 | #define MB_TYPE_P1L1 0x8000 |
| 906 | #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0) |
| 907 | #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1) |
| 908 | #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1) |
| 909 | #define MB_TYPE_QUANT 0x00010000 |
| 910 | #define MB_TYPE_CBP 0x00020000 |
| 911 | //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...) |
| 912 | #endif |
| 913 | |
| 914 | /** |
| 915 | * Pan Scan area. |
| 916 | * This specifies the area which should be displayed. |
| 917 | * Note there may be multiple such areas for one frame. |
| 918 | */ |
| 919 | typedef struct AVPanScan{ |
| 920 | /** |
| 921 | * id |
| 922 | * - encoding: Set by user. |
| 923 | * - decoding: Set by libavcodec. |
| 924 | */ |
| 925 | int id; |
| 926 | |
| 927 | /** |
| 928 | * width and height in 1/16 pel |
| 929 | * - encoding: Set by user. |
| 930 | * - decoding: Set by libavcodec. |
| 931 | */ |
| 932 | int width; |
| 933 | int height; |
| 934 | |
| 935 | /** |
| 936 | * position of the top left corner in 1/16 pel for up to 3 fields/frames |
| 937 | * - encoding: Set by user. |
| 938 | * - decoding: Set by libavcodec. |
| 939 | */ |
| 940 | int16_t position[3][2]; |
| 941 | }AVPanScan; |
| 942 | |
| 943 | #if FF_API_QSCALE_TYPE |
| 944 | #define FF_QSCALE_TYPE_MPEG1 0 |
| 945 | #define FF_QSCALE_TYPE_MPEG2 1 |
| 946 | #define FF_QSCALE_TYPE_H264 2 |
| 947 | #define FF_QSCALE_TYPE_VP56 3 |
| 948 | #endif |
| 949 | |
| 950 | #if FF_API_GET_BUFFER |
| 951 | #define FF_BUFFER_TYPE_INTERNAL 1 |
| 952 | #define FF_BUFFER_TYPE_USER 2 ///< direct rendering buffers (image is (de)allocated by user) |
| 953 | #define FF_BUFFER_TYPE_SHARED 4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared. |
| 954 | #define FF_BUFFER_TYPE_COPY 8 ///< Just a (modified) copy of some other buffer, don't deallocate anything. |
| 955 | |
| 956 | #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore). |
| 957 | #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer. |
| 958 | #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content. |
| 959 | #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update). |
| 960 | #endif |
| 961 | |
| 962 | /** |
| 963 | * The decoder will keep a reference to the frame and may reuse it later. |
| 964 | */ |
| 965 | #define AV_GET_BUFFER_FLAG_REF (1 << 0) |
| 966 | |
| 967 | /** |
| 968 | * @defgroup lavc_packet AVPacket |
| 969 | * |
| 970 | * Types and functions for working with AVPacket. |
| 971 | * @{ |
| 972 | */ |
| 973 | enum AVPacketSideDataType { |
| 974 | AV_PKT_DATA_PALETTE, |
| 975 | AV_PKT_DATA_NEW_EXTRADATA, |
| 976 | |
| 977 | /** |
| 978 | * An AV_PKT_DATA_PARAM_CHANGE side data packet is laid out as follows: |
| 979 | * @code |
| 980 | * u32le param_flags |
| 981 | * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT) |
| 982 | * s32le channel_count |
| 983 | * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT) |
| 984 | * u64le channel_layout |
| 985 | * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE) |
| 986 | * s32le sample_rate |
| 987 | * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS) |
| 988 | * s32le width |
| 989 | * s32le height |
| 990 | * @endcode |
| 991 | */ |
| 992 | AV_PKT_DATA_PARAM_CHANGE, |
| 993 | |
| 994 | /** |
| 995 | * An AV_PKT_DATA_H263_MB_INFO side data packet contains a number of |
| 996 | * structures with info about macroblocks relevant to splitting the |
| 997 | * packet into smaller packets on macroblock edges (e.g. as for RFC 2190). |
| 998 | * That is, it does not necessarily contain info about all macroblocks, |
| 999 | * as long as the distance between macroblocks in the info is smaller |
| 1000 | * than the target payload size. |
| 1001 | * Each MB info structure is 12 bytes, and is laid out as follows: |
| 1002 | * @code |
| 1003 | * u32le bit offset from the start of the packet |
| 1004 | * u8 current quantizer at the start of the macroblock |
| 1005 | * u8 GOB number |
| 1006 | * u16le macroblock address within the GOB |
| 1007 | * u8 horizontal MV predictor |
| 1008 | * u8 vertical MV predictor |
| 1009 | * u8 horizontal MV predictor for block number 3 |
| 1010 | * u8 vertical MV predictor for block number 3 |
| 1011 | * @endcode |
| 1012 | */ |
| 1013 | AV_PKT_DATA_H263_MB_INFO, |
| 1014 | |
| 1015 | /** |
| 1016 | * This side data should be associated with an audio stream and contains |
| 1017 | * ReplayGain information in form of the AVReplayGain struct. |
| 1018 | */ |
| 1019 | AV_PKT_DATA_REPLAYGAIN, |
| 1020 | |
| 1021 | /** |
| 1022 | * This side data contains a 3x3 transformation matrix describing an affine |
| 1023 | * transformation that needs to be applied to the decoded video frames for |
| 1024 | * correct presentation. |
| 1025 | * |
| 1026 | * See libavutil/display.h for a detailed description of the data. |
| 1027 | */ |
| 1028 | AV_PKT_DATA_DISPLAYMATRIX, |
| 1029 | |
| 1030 | /** |
| 1031 | * This side data should be associated with a video stream and contains |
| 1032 | * Stereoscopic 3D information in form of the AVStereo3D struct. |
| 1033 | */ |
| 1034 | AV_PKT_DATA_STEREO3D, |
| 1035 | |
| 1036 | /** |
| 1037 | * Recommmends skipping the specified number of samples |
| 1038 | * @code |
| 1039 | * u32le number of samples to skip from start of this packet |
| 1040 | * u32le number of samples to skip from end of this packet |
| 1041 | * u8 reason for start skip |
| 1042 | * u8 reason for end skip (0=padding silence, 1=convergence) |
| 1043 | * @endcode |
| 1044 | */ |
| 1045 | AV_PKT_DATA_SKIP_SAMPLES=70, |
| 1046 | |
| 1047 | /** |
| 1048 | * An AV_PKT_DATA_JP_DUALMONO side data packet indicates that |
| 1049 | * the packet may contain "dual mono" audio specific to Japanese DTV |
| 1050 | * and if it is true, recommends only the selected channel to be used. |
| 1051 | * @code |
| 1052 | * u8 selected channels (0=mail/left, 1=sub/right, 2=both) |
| 1053 | * @endcode |
| 1054 | */ |
| 1055 | AV_PKT_DATA_JP_DUALMONO, |
| 1056 | |
| 1057 | /** |
| 1058 | * A list of zero terminated key/value strings. There is no end marker for |
| 1059 | * the list, so it is required to rely on the side data size to stop. |
| 1060 | */ |
| 1061 | AV_PKT_DATA_STRINGS_METADATA, |
| 1062 | |
| 1063 | /** |
| 1064 | * Subtitle event position |
| 1065 | * @code |
| 1066 | * u32le x1 |
| 1067 | * u32le y1 |
| 1068 | * u32le x2 |
| 1069 | * u32le y2 |
| 1070 | * @endcode |
| 1071 | */ |
| 1072 | AV_PKT_DATA_SUBTITLE_POSITION, |
| 1073 | |
| 1074 | /** |
| 1075 | * Data found in BlockAdditional element of matroska container. There is |
| 1076 | * no end marker for the data, so it is required to rely on the side data |
| 1077 | * size to recognize the end. 8 byte id (as found in BlockAddId) followed |
| 1078 | * by data. |
| 1079 | */ |
| 1080 | AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL, |
| 1081 | |
| 1082 | /** |
| 1083 | * The optional first identifier line of a WebVTT cue. |
| 1084 | */ |
| 1085 | AV_PKT_DATA_WEBVTT_IDENTIFIER, |
| 1086 | |
| 1087 | /** |
| 1088 | * The optional settings (rendering instructions) that immediately |
| 1089 | * follow the timestamp specifier of a WebVTT cue. |
| 1090 | */ |
| 1091 | AV_PKT_DATA_WEBVTT_SETTINGS, |
| 1092 | |
| 1093 | /** |
| 1094 | * A list of zero terminated key/value strings. There is no end marker for |
| 1095 | * the list, so it is required to rely on the side data size to stop. This |
| 1096 | * side data includes updated metadata which appeared in the stream. |
| 1097 | */ |
| 1098 | AV_PKT_DATA_METADATA_UPDATE, |
| 1099 | }; |
| 1100 | |
| 1101 | typedef struct AVPacketSideData { |
| 1102 | uint8_t *data; |
| 1103 | int size; |
| 1104 | enum AVPacketSideDataType type; |
| 1105 | } AVPacketSideData; |
| 1106 | |
| 1107 | /** |
| 1108 | * This structure stores compressed data. It is typically exported by demuxers |
| 1109 | * and then passed as input to decoders, or received as output from encoders and |
| 1110 | * then passed to muxers. |
| 1111 | * |
| 1112 | * For video, it should typically contain one compressed frame. For audio it may |
| 1113 | * contain several compressed frames. |
| 1114 | * |
| 1115 | * AVPacket is one of the few structs in FFmpeg, whose size is a part of public |
| 1116 | * ABI. Thus it may be allocated on stack and no new fields can be added to it |
| 1117 | * without libavcodec and libavformat major bump. |
| 1118 | * |
| 1119 | * The semantics of data ownership depends on the buf or destruct (deprecated) |
| 1120 | * fields. If either is set, the packet data is dynamically allocated and is |
| 1121 | * valid indefinitely until av_free_packet() is called (which in turn calls |
| 1122 | * av_buffer_unref()/the destruct callback to free the data). If neither is set, |
| 1123 | * the packet data is typically backed by some static buffer somewhere and is |
| 1124 | * only valid for a limited time (e.g. until the next read call when demuxing). |
| 1125 | * |
| 1126 | * The side data is always allocated with av_malloc() and is freed in |
| 1127 | * av_free_packet(). |
| 1128 | */ |
| 1129 | typedef struct AVPacket { |
| 1130 | /** |
| 1131 | * A reference to the reference-counted buffer where the packet data is |
| 1132 | * stored. |
| 1133 | * May be NULL, then the packet data is not reference-counted. |
| 1134 | */ |
| 1135 | AVBufferRef *buf; |
| 1136 | /** |
| 1137 | * Presentation timestamp in AVStream->time_base units; the time at which |
| 1138 | * the decompressed packet will be presented to the user. |
| 1139 | * Can be AV_NOPTS_VALUE if it is not stored in the file. |
| 1140 | * pts MUST be larger or equal to dts as presentation cannot happen before |
| 1141 | * decompression, unless one wants to view hex dumps. Some formats misuse |
| 1142 | * the terms dts and pts/cts to mean something different. Such timestamps |
| 1143 | * must be converted to true pts/dts before they are stored in AVPacket. |
| 1144 | */ |
| 1145 | int64_t pts; |
| 1146 | /** |
| 1147 | * Decompression timestamp in AVStream->time_base units; the time at which |
| 1148 | * the packet is decompressed. |
| 1149 | * Can be AV_NOPTS_VALUE if it is not stored in the file. |
| 1150 | */ |
| 1151 | int64_t dts; |
| 1152 | uint8_t *data; |
| 1153 | int size; |
| 1154 | int stream_index; |
| 1155 | /** |
| 1156 | * A combination of AV_PKT_FLAG values |
| 1157 | */ |
| 1158 | int flags; |
| 1159 | /** |
| 1160 | * Additional packet data that can be provided by the container. |
| 1161 | * Packet can contain several types of side information. |
| 1162 | */ |
| 1163 | AVPacketSideData *side_data; |
| 1164 | int side_data_elems; |
| 1165 | |
| 1166 | /** |
| 1167 | * Duration of this packet in AVStream->time_base units, 0 if unknown. |
| 1168 | * Equals next_pts - this_pts in presentation order. |
| 1169 | */ |
| 1170 | int duration; |
| 1171 | #if FF_API_DESTRUCT_PACKET |
| 1172 | attribute_deprecated |
| 1173 | void (*destruct)(struct AVPacket *); |
| 1174 | attribute_deprecated |
| 1175 | void *priv; |
| 1176 | #endif |
| 1177 | int64_t pos; ///< byte position in stream, -1 if unknown |
| 1178 | |
| 1179 | /** |
| 1180 | * Time difference in AVStream->time_base units from the pts of this |
| 1181 | * packet to the point at which the output from the decoder has converged |
| 1182 | * independent from the availability of previous frames. That is, the |
| 1183 | * frames are virtually identical no matter if decoding started from |
| 1184 | * the very first frame or from this keyframe. |
| 1185 | * Is AV_NOPTS_VALUE if unknown. |
| 1186 | * This field is not the display duration of the current packet. |
| 1187 | * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY |
| 1188 | * set. |
| 1189 | * |
| 1190 | * The purpose of this field is to allow seeking in streams that have no |
| 1191 | * keyframes in the conventional sense. It corresponds to the |
| 1192 | * recovery point SEI in H.264 and match_time_delta in NUT. It is also |
| 1193 | * essential for some types of subtitle streams to ensure that all |
| 1194 | * subtitles are correctly displayed after seeking. |
| 1195 | */ |
| 1196 | int64_t convergence_duration; |
| 1197 | } AVPacket; |
| 1198 | #define AV_PKT_FLAG_KEY 0x0001 ///< The packet contains a keyframe |
| 1199 | #define AV_PKT_FLAG_CORRUPT 0x0002 ///< The packet content is corrupted |
| 1200 | |
| 1201 | enum AVSideDataParamChangeFlags { |
| 1202 | AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT = 0x0001, |
| 1203 | AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT = 0x0002, |
| 1204 | AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE = 0x0004, |
| 1205 | AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS = 0x0008, |
| 1206 | }; |
| 1207 | /** |
| 1208 | * @} |
| 1209 | */ |
| 1210 | |
| 1211 | struct AVCodecInternal; |
| 1212 | |
| 1213 | enum AVFieldOrder { |
| 1214 | AV_FIELD_UNKNOWN, |
| 1215 | AV_FIELD_PROGRESSIVE, |
| 1216 | AV_FIELD_TT, //< Top coded_first, top displayed first |
| 1217 | AV_FIELD_BB, //< Bottom coded first, bottom displayed first |
| 1218 | AV_FIELD_TB, //< Top coded first, bottom displayed first |
| 1219 | AV_FIELD_BT, //< Bottom coded first, top displayed first |
| 1220 | }; |
| 1221 | |
| 1222 | /** |
| 1223 | * main external API structure. |
| 1224 | * New fields can be added to the end with minor version bumps. |
| 1225 | * Removal, reordering and changes to existing fields require a major |
| 1226 | * version bump. |
| 1227 | * Please use AVOptions (av_opt* / av_set/get*()) to access these fields from user |
| 1228 | * applications. |
| 1229 | * sizeof(AVCodecContext) must not be used outside libav*. |
| 1230 | */ |
| 1231 | typedef struct AVCodecContext { |
| 1232 | /** |
| 1233 | * information on struct for av_log |
| 1234 | * - set by avcodec_alloc_context3 |
| 1235 | */ |
| 1236 | const AVClass *av_class; |
| 1237 | int log_level_offset; |
| 1238 | |
| 1239 | enum AVMediaType codec_type; /* see AVMEDIA_TYPE_xxx */ |
| 1240 | const struct AVCodec *codec; |
| 1241 | #if FF_API_CODEC_NAME |
| 1242 | /** |
| 1243 | * @deprecated this field is not used for anything in libavcodec |
| 1244 | */ |
| 1245 | attribute_deprecated |
| 1246 | char codec_name[32]; |
| 1247 | #endif |
| 1248 | enum AVCodecID codec_id; /* see AV_CODEC_ID_xxx */ |
| 1249 | |
| 1250 | /** |
| 1251 | * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A'). |
| 1252 | * This is used to work around some encoder bugs. |
| 1253 | * A demuxer should set this to what is stored in the field used to identify the codec. |
| 1254 | * If there are multiple such fields in a container then the demuxer should choose the one |
| 1255 | * which maximizes the information about the used codec. |
| 1256 | * If the codec tag field in a container is larger than 32 bits then the demuxer should |
| 1257 | * remap the longer ID to 32 bits with a table or other structure. Alternatively a new |
| 1258 | * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated |
| 1259 | * first. |
| 1260 | * - encoding: Set by user, if not then the default based on codec_id will be used. |
| 1261 | * - decoding: Set by user, will be converted to uppercase by libavcodec during init. |
| 1262 | */ |
| 1263 | unsigned int codec_tag; |
| 1264 | |
| 1265 | /** |
| 1266 | * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A'). |
| 1267 | * This is used to work around some encoder bugs. |
| 1268 | * - encoding: unused |
| 1269 | * - decoding: Set by user, will be converted to uppercase by libavcodec during init. |
| 1270 | */ |
| 1271 | unsigned int stream_codec_tag; |
| 1272 | |
| 1273 | void *priv_data; |
| 1274 | |
| 1275 | /** |
| 1276 | * Private context used for internal data. |
| 1277 | * |
| 1278 | * Unlike priv_data, this is not codec-specific. It is used in general |
| 1279 | * libavcodec functions. |
| 1280 | */ |
| 1281 | struct AVCodecInternal *internal; |
| 1282 | |
| 1283 | /** |
| 1284 | * Private data of the user, can be used to carry app specific stuff. |
| 1285 | * - encoding: Set by user. |
| 1286 | * - decoding: Set by user. |
| 1287 | */ |
| 1288 | void *opaque; |
| 1289 | |
| 1290 | /** |
| 1291 | * the average bitrate |
| 1292 | * - encoding: Set by user; unused for constant quantizer encoding. |
| 1293 | * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream. |
| 1294 | */ |
| 1295 | int bit_rate; |
| 1296 | |
| 1297 | /** |
| 1298 | * number of bits the bitstream is allowed to diverge from the reference. |
| 1299 | * the reference can be CBR (for CBR pass1) or VBR (for pass2) |
| 1300 | * - encoding: Set by user; unused for constant quantizer encoding. |
| 1301 | * - decoding: unused |
| 1302 | */ |
| 1303 | int bit_rate_tolerance; |
| 1304 | |
| 1305 | /** |
| 1306 | * Global quality for codecs which cannot change it per frame. |
| 1307 | * This should be proportional to MPEG-1/2/4 qscale. |
| 1308 | * - encoding: Set by user. |
| 1309 | * - decoding: unused |
| 1310 | */ |
| 1311 | int global_quality; |
| 1312 | |
| 1313 | /** |
| 1314 | * - encoding: Set by user. |
| 1315 | * - decoding: unused |
| 1316 | */ |
| 1317 | int compression_level; |
| 1318 | #define FF_COMPRESSION_DEFAULT -1 |
| 1319 | |
| 1320 | /** |
| 1321 | * CODEC_FLAG_*. |
| 1322 | * - encoding: Set by user. |
| 1323 | * - decoding: Set by user. |
| 1324 | */ |
| 1325 | int flags; |
| 1326 | |
| 1327 | /** |
| 1328 | * CODEC_FLAG2_* |
| 1329 | * - encoding: Set by user. |
| 1330 | * - decoding: Set by user. |
| 1331 | */ |
| 1332 | int flags2; |
| 1333 | |
| 1334 | /** |
| 1335 | * some codecs need / can use extradata like Huffman tables. |
| 1336 | * mjpeg: Huffman tables |
| 1337 | * rv10: additional flags |
| 1338 | * mpeg4: global headers (they can be in the bitstream or here) |
| 1339 | * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger |
| 1340 | * than extradata_size to avoid problems if it is read with the bitstream reader. |
| 1341 | * The bytewise contents of extradata must not depend on the architecture or CPU endianness. |
| 1342 | * - encoding: Set/allocated/freed by libavcodec. |
| 1343 | * - decoding: Set/allocated/freed by user. |
| 1344 | */ |
| 1345 | uint8_t *extradata; |
| 1346 | int extradata_size; |
| 1347 | |
| 1348 | /** |
| 1349 | * This is the fundamental unit of time (in seconds) in terms |
| 1350 | * of which frame timestamps are represented. For fixed-fps content, |
| 1351 | * timebase should be 1/framerate and timestamp increments should be |
| 1352 | * identically 1. |
| 1353 | * - encoding: MUST be set by user. |
| 1354 | * - decoding: Set by libavcodec. |
| 1355 | */ |
| 1356 | AVRational time_base; |
| 1357 | |
| 1358 | /** |
| 1359 | * For some codecs, the time base is closer to the field rate than the frame rate. |
| 1360 | * Most notably, H.264 and MPEG-2 specify time_base as half of frame duration |
| 1361 | * if no telecine is used ... |
| 1362 | * |
| 1363 | * Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2. |
| 1364 | */ |
| 1365 | int ticks_per_frame; |
| 1366 | |
| 1367 | /** |
| 1368 | * Codec delay. |
| 1369 | * |
| 1370 | * Encoding: Number of frames delay there will be from the encoder input to |
| 1371 | * the decoder output. (we assume the decoder matches the spec) |
| 1372 | * Decoding: Number of frames delay in addition to what a standard decoder |
| 1373 | * as specified in the spec would produce. |
| 1374 | * |
| 1375 | * Video: |
| 1376 | * Number of frames the decoded output will be delayed relative to the |
| 1377 | * encoded input. |
| 1378 | * |
| 1379 | * Audio: |
| 1380 | * For encoding, this is the number of "priming" samples added by the |
| 1381 | * encoder to the beginning of the stream. The decoded output will be |
| 1382 | * delayed by this many samples relative to the input to the encoder (or |
| 1383 | * more, if the decoder adds its own padding). |
| 1384 | * The timestamps on the output packets are adjusted by the encoder so |
| 1385 | * that they always refer to the first sample of the data actually |
| 1386 | * contained in the packet, including any added padding. |
| 1387 | * E.g. if the timebase is 1/samplerate and the timestamp of the first |
| 1388 | * input sample is 0, the timestamp of the first output packet will be |
| 1389 | * -delay. |
| 1390 | * |
| 1391 | * For decoding, this is the number of samples the decoder needs to |
| 1392 | * output before the decoder's output is valid. When seeking, you should |
| 1393 | * start decoding this many samples prior to your desired seek point. |
| 1394 | * |
| 1395 | * - encoding: Set by libavcodec. |
| 1396 | * - decoding: Set by libavcodec. |
| 1397 | */ |
| 1398 | int delay; |
| 1399 | |
| 1400 | |
| 1401 | /* video only */ |
| 1402 | /** |
| 1403 | * picture width / height. |
| 1404 | * - encoding: MUST be set by user. |
| 1405 | * - decoding: May be set by the user before opening the decoder if known e.g. |
| 1406 | * from the container. Some decoders will require the dimensions |
| 1407 | * to be set by the caller. During decoding, the decoder may |
| 1408 | * overwrite those values as required. |
| 1409 | */ |
| 1410 | int width, height; |
| 1411 | |
| 1412 | /** |
| 1413 | * Bitstream width / height, may be different from width/height e.g. when |
| 1414 | * the decoded frame is cropped before being output or lowres is enabled. |
| 1415 | * - encoding: unused |
| 1416 | * - decoding: May be set by the user before opening the decoder if known |
| 1417 | * e.g. from the container. During decoding, the decoder may |
| 1418 | * overwrite those values as required. |
| 1419 | */ |
| 1420 | int coded_width, coded_height; |
| 1421 | |
| 1422 | #if FF_API_ASPECT_EXTENDED |
| 1423 | #define FF_ASPECT_EXTENDED 15 |
| 1424 | #endif |
| 1425 | |
| 1426 | /** |
| 1427 | * the number of pictures in a group of pictures, or 0 for intra_only |
| 1428 | * - encoding: Set by user. |
| 1429 | * - decoding: unused |
| 1430 | */ |
| 1431 | int gop_size; |
| 1432 | |
| 1433 | /** |
| 1434 | * Pixel format, see AV_PIX_FMT_xxx. |
| 1435 | * May be set by the demuxer if known from headers. |
| 1436 | * May be overridden by the decoder if it knows better. |
| 1437 | * - encoding: Set by user. |
| 1438 | * - decoding: Set by user if known, overridden by libavcodec if known |
| 1439 | */ |
| 1440 | enum AVPixelFormat pix_fmt; |
| 1441 | |
| 1442 | /** |
| 1443 | * Motion estimation algorithm used for video coding. |
| 1444 | * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex), |
| 1445 | * 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific] |
| 1446 | * - encoding: MUST be set by user. |
| 1447 | * - decoding: unused |
| 1448 | */ |
| 1449 | int me_method; |
| 1450 | |
| 1451 | /** |
| 1452 | * If non NULL, 'draw_horiz_band' is called by the libavcodec |
| 1453 | * decoder to draw a horizontal band. It improves cache usage. Not |
| 1454 | * all codecs can do that. You must check the codec capabilities |
| 1455 | * beforehand. |
| 1456 | * When multithreading is used, it may be called from multiple threads |
| 1457 | * at the same time; threads might draw different parts of the same AVFrame, |
| 1458 | * or multiple AVFrames, and there is no guarantee that slices will be drawn |
| 1459 | * in order. |
| 1460 | * The function is also used by hardware acceleration APIs. |
| 1461 | * It is called at least once during frame decoding to pass |
| 1462 | * the data needed for hardware render. |
| 1463 | * In that mode instead of pixel data, AVFrame points to |
| 1464 | * a structure specific to the acceleration API. The application |
| 1465 | * reads the structure and can change some fields to indicate progress |
| 1466 | * or mark state. |
| 1467 | * - encoding: unused |
| 1468 | * - decoding: Set by user. |
| 1469 | * @param height the height of the slice |
| 1470 | * @param y the y position of the slice |
| 1471 | * @param type 1->top field, 2->bottom field, 3->frame |
| 1472 | * @param offset offset into the AVFrame.data from which the slice should be read |
| 1473 | */ |
| 1474 | void (*draw_horiz_band)(struct AVCodecContext *s, |
| 1475 | const AVFrame *src, int offset[AV_NUM_DATA_POINTERS], |
| 1476 | int y, int type, int height); |
| 1477 | |
| 1478 | /** |
| 1479 | * callback to negotiate the pixelFormat |
| 1480 | * @param fmt is the list of formats which are supported by the codec, |
| 1481 | * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality. |
| 1482 | * The first is always the native one. |
| 1483 | * @return the chosen format |
| 1484 | * - encoding: unused |
| 1485 | * - decoding: Set by user, if not set the native format will be chosen. |
| 1486 | */ |
| 1487 | enum AVPixelFormat (*get_format)(struct AVCodecContext *s, const enum AVPixelFormat * fmt); |
| 1488 | |
| 1489 | /** |
| 1490 | * maximum number of B-frames between non-B-frames |
| 1491 | * Note: The output will be delayed by max_b_frames+1 relative to the input. |
| 1492 | * - encoding: Set by user. |
| 1493 | * - decoding: unused |
| 1494 | */ |
| 1495 | int max_b_frames; |
| 1496 | |
| 1497 | /** |
| 1498 | * qscale factor between IP and B-frames |
| 1499 | * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset). |
| 1500 | * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset). |
| 1501 | * - encoding: Set by user. |
| 1502 | * - decoding: unused |
| 1503 | */ |
| 1504 | float b_quant_factor; |
| 1505 | |
| 1506 | /** obsolete FIXME remove */ |
| 1507 | int rc_strategy; |
| 1508 | #define FF_RC_STRATEGY_XVID 1 |
| 1509 | |
| 1510 | int b_frame_strategy; |
| 1511 | |
| 1512 | /** |
| 1513 | * qscale offset between IP and B-frames |
| 1514 | * - encoding: Set by user. |
| 1515 | * - decoding: unused |
| 1516 | */ |
| 1517 | float b_quant_offset; |
| 1518 | |
| 1519 | /** |
| 1520 | * Size of the frame reordering buffer in the decoder. |
| 1521 | * For MPEG-2 it is 1 IPB or 0 low delay IP. |
| 1522 | * - encoding: Set by libavcodec. |
| 1523 | * - decoding: Set by libavcodec. |
| 1524 | */ |
| 1525 | int has_b_frames; |
| 1526 | |
| 1527 | /** |
| 1528 | * 0-> h263 quant 1-> mpeg quant |
| 1529 | * - encoding: Set by user. |
| 1530 | * - decoding: unused |
| 1531 | */ |
| 1532 | int mpeg_quant; |
| 1533 | |
| 1534 | /** |
| 1535 | * qscale factor between P and I-frames |
| 1536 | * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset). |
| 1537 | * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset). |
| 1538 | * - encoding: Set by user. |
| 1539 | * - decoding: unused |
| 1540 | */ |
| 1541 | float i_quant_factor; |
| 1542 | |
| 1543 | /** |
| 1544 | * qscale offset between P and I-frames |
| 1545 | * - encoding: Set by user. |
| 1546 | * - decoding: unused |
| 1547 | */ |
| 1548 | float i_quant_offset; |
| 1549 | |
| 1550 | /** |
| 1551 | * luminance masking (0-> disabled) |
| 1552 | * - encoding: Set by user. |
| 1553 | * - decoding: unused |
| 1554 | */ |
| 1555 | float lumi_masking; |
| 1556 | |
| 1557 | /** |
| 1558 | * temporary complexity masking (0-> disabled) |
| 1559 | * - encoding: Set by user. |
| 1560 | * - decoding: unused |
| 1561 | */ |
| 1562 | float temporal_cplx_masking; |
| 1563 | |
| 1564 | /** |
| 1565 | * spatial complexity masking (0-> disabled) |
| 1566 | * - encoding: Set by user. |
| 1567 | * - decoding: unused |
| 1568 | */ |
| 1569 | float spatial_cplx_masking; |
| 1570 | |
| 1571 | /** |
| 1572 | * p block masking (0-> disabled) |
| 1573 | * - encoding: Set by user. |
| 1574 | * - decoding: unused |
| 1575 | */ |
| 1576 | float p_masking; |
| 1577 | |
| 1578 | /** |
| 1579 | * darkness masking (0-> disabled) |
| 1580 | * - encoding: Set by user. |
| 1581 | * - decoding: unused |
| 1582 | */ |
| 1583 | float dark_masking; |
| 1584 | |
| 1585 | /** |
| 1586 | * slice count |
| 1587 | * - encoding: Set by libavcodec. |
| 1588 | * - decoding: Set by user (or 0). |
| 1589 | */ |
| 1590 | int slice_count; |
| 1591 | /** |
| 1592 | * prediction method (needed for huffyuv) |
| 1593 | * - encoding: Set by user. |
| 1594 | * - decoding: unused |
| 1595 | */ |
| 1596 | int prediction_method; |
| 1597 | #define FF_PRED_LEFT 0 |
| 1598 | #define FF_PRED_PLANE 1 |
| 1599 | #define FF_PRED_MEDIAN 2 |
| 1600 | |
| 1601 | /** |
| 1602 | * slice offsets in the frame in bytes |
| 1603 | * - encoding: Set/allocated by libavcodec. |
| 1604 | * - decoding: Set/allocated by user (or NULL). |
| 1605 | */ |
| 1606 | int *slice_offset; |
| 1607 | |
| 1608 | /** |
| 1609 | * sample aspect ratio (0 if unknown) |
| 1610 | * That is the width of a pixel divided by the height of the pixel. |
| 1611 | * Numerator and denominator must be relatively prime and smaller than 256 for some video standards. |
| 1612 | * - encoding: Set by user. |
| 1613 | * - decoding: Set by libavcodec. |
| 1614 | */ |
| 1615 | AVRational sample_aspect_ratio; |
| 1616 | |
| 1617 | /** |
| 1618 | * motion estimation comparison function |
| 1619 | * - encoding: Set by user. |
| 1620 | * - decoding: unused |
| 1621 | */ |
| 1622 | int me_cmp; |
| 1623 | /** |
| 1624 | * subpixel motion estimation comparison function |
| 1625 | * - encoding: Set by user. |
| 1626 | * - decoding: unused |
| 1627 | */ |
| 1628 | int me_sub_cmp; |
| 1629 | /** |
| 1630 | * macroblock comparison function (not supported yet) |
| 1631 | * - encoding: Set by user. |
| 1632 | * - decoding: unused |
| 1633 | */ |
| 1634 | int mb_cmp; |
| 1635 | /** |
| 1636 | * interlaced DCT comparison function |
| 1637 | * - encoding: Set by user. |
| 1638 | * - decoding: unused |
| 1639 | */ |
| 1640 | int ildct_cmp; |
| 1641 | #define FF_CMP_SAD 0 |
| 1642 | #define FF_CMP_SSE 1 |
| 1643 | #define FF_CMP_SATD 2 |
| 1644 | #define FF_CMP_DCT 3 |
| 1645 | #define FF_CMP_PSNR 4 |
| 1646 | #define FF_CMP_BIT 5 |
| 1647 | #define FF_CMP_RD 6 |
| 1648 | #define FF_CMP_ZERO 7 |
| 1649 | #define FF_CMP_VSAD 8 |
| 1650 | #define FF_CMP_VSSE 9 |
| 1651 | #define FF_CMP_NSSE 10 |
| 1652 | #define FF_CMP_W53 11 |
| 1653 | #define FF_CMP_W97 12 |
| 1654 | #define FF_CMP_DCTMAX 13 |
| 1655 | #define FF_CMP_DCT264 14 |
| 1656 | #define FF_CMP_CHROMA 256 |
| 1657 | |
| 1658 | /** |
| 1659 | * ME diamond size & shape |
| 1660 | * - encoding: Set by user. |
| 1661 | * - decoding: unused |
| 1662 | */ |
| 1663 | int dia_size; |
| 1664 | |
| 1665 | /** |
| 1666 | * amount of previous MV predictors (2a+1 x 2a+1 square) |
| 1667 | * - encoding: Set by user. |
| 1668 | * - decoding: unused |
| 1669 | */ |
| 1670 | int last_predictor_count; |
| 1671 | |
| 1672 | /** |
| 1673 | * prepass for motion estimation |
| 1674 | * - encoding: Set by user. |
| 1675 | * - decoding: unused |
| 1676 | */ |
| 1677 | int pre_me; |
| 1678 | |
| 1679 | /** |
| 1680 | * motion estimation prepass comparison function |
| 1681 | * - encoding: Set by user. |
| 1682 | * - decoding: unused |
| 1683 | */ |
| 1684 | int me_pre_cmp; |
| 1685 | |
| 1686 | /** |
| 1687 | * ME prepass diamond size & shape |
| 1688 | * - encoding: Set by user. |
| 1689 | * - decoding: unused |
| 1690 | */ |
| 1691 | int pre_dia_size; |
| 1692 | |
| 1693 | /** |
| 1694 | * subpel ME quality |
| 1695 | * - encoding: Set by user. |
| 1696 | * - decoding: unused |
| 1697 | */ |
| 1698 | int me_subpel_quality; |
| 1699 | |
| 1700 | #if FF_API_AFD |
| 1701 | /** |
| 1702 | * DTG active format information (additional aspect ratio |
| 1703 | * information only used in DVB MPEG-2 transport streams) |
| 1704 | * 0 if not set. |
| 1705 | * |
| 1706 | * - encoding: unused |
| 1707 | * - decoding: Set by decoder. |
| 1708 | * @deprecated Deprecated in favor of AVSideData |
| 1709 | */ |
| 1710 | attribute_deprecated int dtg_active_format; |
| 1711 | #define FF_DTG_AFD_SAME 8 |
| 1712 | #define FF_DTG_AFD_4_3 9 |
| 1713 | #define FF_DTG_AFD_16_9 10 |
| 1714 | #define FF_DTG_AFD_14_9 11 |
| 1715 | #define FF_DTG_AFD_4_3_SP_14_9 13 |
| 1716 | #define FF_DTG_AFD_16_9_SP_14_9 14 |
| 1717 | #define FF_DTG_AFD_SP_4_3 15 |
| 1718 | #endif /* FF_API_AFD */ |
| 1719 | |
| 1720 | /** |
| 1721 | * maximum motion estimation search range in subpel units |
| 1722 | * If 0 then no limit. |
| 1723 | * |
| 1724 | * - encoding: Set by user. |
| 1725 | * - decoding: unused |
| 1726 | */ |
| 1727 | int me_range; |
| 1728 | |
| 1729 | /** |
| 1730 | * intra quantizer bias |
| 1731 | * - encoding: Set by user. |
| 1732 | * - decoding: unused |
| 1733 | */ |
| 1734 | int intra_quant_bias; |
| 1735 | #define FF_DEFAULT_QUANT_BIAS 999999 |
| 1736 | |
| 1737 | /** |
| 1738 | * inter quantizer bias |
| 1739 | * - encoding: Set by user. |
| 1740 | * - decoding: unused |
| 1741 | */ |
| 1742 | int inter_quant_bias; |
| 1743 | |
| 1744 | /** |
| 1745 | * slice flags |
| 1746 | * - encoding: unused |
| 1747 | * - decoding: Set by user. |
| 1748 | */ |
| 1749 | int slice_flags; |
| 1750 | #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display |
| 1751 | #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics) |
| 1752 | #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1) |
| 1753 | |
| 1754 | #if FF_API_XVMC |
| 1755 | /** |
| 1756 | * XVideo Motion Acceleration |
| 1757 | * - encoding: forbidden |
| 1758 | * - decoding: set by decoder |
| 1759 | * @deprecated XvMC doesn't need it anymore. |
| 1760 | */ |
| 1761 | attribute_deprecated int xvmc_acceleration; |
| 1762 | #endif /* FF_API_XVMC */ |
| 1763 | |
| 1764 | /** |
| 1765 | * macroblock decision mode |
| 1766 | * - encoding: Set by user. |
| 1767 | * - decoding: unused |
| 1768 | */ |
| 1769 | int mb_decision; |
| 1770 | #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp |
| 1771 | #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits |
| 1772 | #define FF_MB_DECISION_RD 2 ///< rate distortion |
| 1773 | |
| 1774 | /** |
| 1775 | * custom intra quantization matrix |
| 1776 | * - encoding: Set by user, can be NULL. |
| 1777 | * - decoding: Set by libavcodec. |
| 1778 | */ |
| 1779 | uint16_t *intra_matrix; |
| 1780 | |
| 1781 | /** |
| 1782 | * custom inter quantization matrix |
| 1783 | * - encoding: Set by user, can be NULL. |
| 1784 | * - decoding: Set by libavcodec. |
| 1785 | */ |
| 1786 | uint16_t *inter_matrix; |
| 1787 | |
| 1788 | /** |
| 1789 | * scene change detection threshold |
| 1790 | * 0 is default, larger means fewer detected scene changes. |
| 1791 | * - encoding: Set by user. |
| 1792 | * - decoding: unused |
| 1793 | */ |
| 1794 | int scenechange_threshold; |
| 1795 | |
| 1796 | /** |
| 1797 | * noise reduction strength |
| 1798 | * - encoding: Set by user. |
| 1799 | * - decoding: unused |
| 1800 | */ |
| 1801 | int noise_reduction; |
| 1802 | |
| 1803 | /** |
| 1804 | * Motion estimation threshold below which no motion estimation is |
| 1805 | * performed, but instead the user specified motion vectors are used. |
| 1806 | * |
| 1807 | * - encoding: Set by user. |
| 1808 | * - decoding: unused |
| 1809 | */ |
| 1810 | int me_threshold; |
| 1811 | |
| 1812 | /** |
| 1813 | * Macroblock threshold below which the user specified macroblock types will be used. |
| 1814 | * - encoding: Set by user. |
| 1815 | * - decoding: unused |
| 1816 | */ |
| 1817 | int mb_threshold; |
| 1818 | |
| 1819 | /** |
| 1820 | * precision of the intra DC coefficient - 8 |
| 1821 | * - encoding: Set by user. |
| 1822 | * - decoding: unused |
| 1823 | */ |
| 1824 | int intra_dc_precision; |
| 1825 | |
| 1826 | /** |
| 1827 | * Number of macroblock rows at the top which are skipped. |
| 1828 | * - encoding: unused |
| 1829 | * - decoding: Set by user. |
| 1830 | */ |
| 1831 | int skip_top; |
| 1832 | |
| 1833 | /** |
| 1834 | * Number of macroblock rows at the bottom which are skipped. |
| 1835 | * - encoding: unused |
| 1836 | * - decoding: Set by user. |
| 1837 | */ |
| 1838 | int skip_bottom; |
| 1839 | |
| 1840 | /** |
| 1841 | * Border processing masking, raises the quantizer for mbs on the borders |
| 1842 | * of the picture. |
| 1843 | * - encoding: Set by user. |
| 1844 | * - decoding: unused |
| 1845 | */ |
| 1846 | float border_masking; |
| 1847 | |
| 1848 | /** |
| 1849 | * minimum MB lagrange multipler |
| 1850 | * - encoding: Set by user. |
| 1851 | * - decoding: unused |
| 1852 | */ |
| 1853 | int mb_lmin; |
| 1854 | |
| 1855 | /** |
| 1856 | * maximum MB lagrange multipler |
| 1857 | * - encoding: Set by user. |
| 1858 | * - decoding: unused |
| 1859 | */ |
| 1860 | int mb_lmax; |
| 1861 | |
| 1862 | /** |
| 1863 | * |
| 1864 | * - encoding: Set by user. |
| 1865 | * - decoding: unused |
| 1866 | */ |
| 1867 | int me_penalty_compensation; |
| 1868 | |
| 1869 | /** |
| 1870 | * |
| 1871 | * - encoding: Set by user. |
| 1872 | * - decoding: unused |
| 1873 | */ |
| 1874 | int bidir_refine; |
| 1875 | |
| 1876 | /** |
| 1877 | * |
| 1878 | * - encoding: Set by user. |
| 1879 | * - decoding: unused |
| 1880 | */ |
| 1881 | int brd_scale; |
| 1882 | |
| 1883 | /** |
| 1884 | * minimum GOP size |
| 1885 | * - encoding: Set by user. |
| 1886 | * - decoding: unused |
| 1887 | */ |
| 1888 | int keyint_min; |
| 1889 | |
| 1890 | /** |
| 1891 | * number of reference frames |
| 1892 | * - encoding: Set by user. |
| 1893 | * - decoding: Set by lavc. |
| 1894 | */ |
| 1895 | int refs; |
| 1896 | |
| 1897 | /** |
| 1898 | * chroma qp offset from luma |
| 1899 | * - encoding: Set by user. |
| 1900 | * - decoding: unused |
| 1901 | */ |
| 1902 | int chromaoffset; |
| 1903 | |
| 1904 | #if FF_API_UNUSED_MEMBERS |
| 1905 | /** |
| 1906 | * Multiplied by qscale for each frame and added to scene_change_score. |
| 1907 | * - encoding: Set by user. |
| 1908 | * - decoding: unused |
| 1909 | */ |
| 1910 | attribute_deprecated int scenechange_factor; |
| 1911 | #endif |
| 1912 | |
| 1913 | /** |
| 1914 | * |
| 1915 | * Note: Value depends upon the compare function used for fullpel ME. |
| 1916 | * - encoding: Set by user. |
| 1917 | * - decoding: unused |
| 1918 | */ |
| 1919 | int mv0_threshold; |
| 1920 | |
| 1921 | /** |
| 1922 | * Adjust sensitivity of b_frame_strategy 1. |
| 1923 | * - encoding: Set by user. |
| 1924 | * - decoding: unused |
| 1925 | */ |
| 1926 | int b_sensitivity; |
| 1927 | |
| 1928 | /** |
| 1929 | * Chromaticity coordinates of the source primaries. |
| 1930 | * - encoding: Set by user |
| 1931 | * - decoding: Set by libavcodec |
| 1932 | */ |
| 1933 | enum AVColorPrimaries color_primaries; |
| 1934 | |
| 1935 | /** |
| 1936 | * Color Transfer Characteristic. |
| 1937 | * - encoding: Set by user |
| 1938 | * - decoding: Set by libavcodec |
| 1939 | */ |
| 1940 | enum AVColorTransferCharacteristic color_trc; |
| 1941 | |
| 1942 | /** |
| 1943 | * YUV colorspace type. |
| 1944 | * - encoding: Set by user |
| 1945 | * - decoding: Set by libavcodec |
| 1946 | */ |
| 1947 | enum AVColorSpace colorspace; |
| 1948 | |
| 1949 | /** |
| 1950 | * MPEG vs JPEG YUV range. |
| 1951 | * - encoding: Set by user |
| 1952 | * - decoding: Set by libavcodec |
| 1953 | */ |
| 1954 | enum AVColorRange color_range; |
| 1955 | |
| 1956 | /** |
| 1957 | * This defines the location of chroma samples. |
| 1958 | * - encoding: Set by user |
| 1959 | * - decoding: Set by libavcodec |
| 1960 | */ |
| 1961 | enum AVChromaLocation chroma_sample_location; |
| 1962 | |
| 1963 | /** |
| 1964 | * Number of slices. |
| 1965 | * Indicates number of picture subdivisions. Used for parallelized |
| 1966 | * decoding. |
| 1967 | * - encoding: Set by user |
| 1968 | * - decoding: unused |
| 1969 | */ |
| 1970 | int slices; |
| 1971 | |
| 1972 | /** Field order |
| 1973 | * - encoding: set by libavcodec |
| 1974 | * - decoding: Set by user. |
| 1975 | */ |
| 1976 | enum AVFieldOrder field_order; |
| 1977 | |
| 1978 | /* audio only */ |
| 1979 | int sample_rate; ///< samples per second |
| 1980 | int channels; ///< number of audio channels |
| 1981 | |
| 1982 | /** |
| 1983 | * audio sample format |
| 1984 | * - encoding: Set by user. |
| 1985 | * - decoding: Set by libavcodec. |
| 1986 | */ |
| 1987 | enum AVSampleFormat sample_fmt; ///< sample format |
| 1988 | |
| 1989 | /* The following data should not be initialized. */ |
| 1990 | /** |
| 1991 | * Number of samples per channel in an audio frame. |
| 1992 | * |
| 1993 | * - encoding: set by libavcodec in avcodec_open2(). Each submitted frame |
| 1994 | * except the last must contain exactly frame_size samples per channel. |
| 1995 | * May be 0 when the codec has CODEC_CAP_VARIABLE_FRAME_SIZE set, then the |
| 1996 | * frame size is not restricted. |
| 1997 | * - decoding: may be set by some decoders to indicate constant frame size |
| 1998 | */ |
| 1999 | int frame_size; |
| 2000 | |
| 2001 | /** |
| 2002 | * Frame counter, set by libavcodec. |
| 2003 | * |
| 2004 | * - decoding: total number of frames returned from the decoder so far. |
| 2005 | * - encoding: total number of frames passed to the encoder so far. |
| 2006 | * |
| 2007 | * @note the counter is not incremented if encoding/decoding resulted in |
| 2008 | * an error. |
| 2009 | */ |
| 2010 | int frame_number; |
| 2011 | |
| 2012 | /** |
| 2013 | * number of bytes per packet if constant and known or 0 |
| 2014 | * Used by some WAV based audio codecs. |
| 2015 | */ |
| 2016 | int block_align; |
| 2017 | |
| 2018 | /** |
| 2019 | * Audio cutoff bandwidth (0 means "automatic") |
| 2020 | * - encoding: Set by user. |
| 2021 | * - decoding: unused |
| 2022 | */ |
| 2023 | int cutoff; |
| 2024 | |
| 2025 | #if FF_API_REQUEST_CHANNELS |
| 2026 | /** |
| 2027 | * Decoder should decode to this many channels if it can (0 for default) |
| 2028 | * - encoding: unused |
| 2029 | * - decoding: Set by user. |
| 2030 | * @deprecated Deprecated in favor of request_channel_layout. |
| 2031 | */ |
| 2032 | attribute_deprecated int request_channels; |
| 2033 | #endif |
| 2034 | |
| 2035 | /** |
| 2036 | * Audio channel layout. |
| 2037 | * - encoding: set by user. |
| 2038 | * - decoding: set by user, may be overwritten by libavcodec. |
| 2039 | */ |
| 2040 | uint64_t channel_layout; |
| 2041 | |
| 2042 | /** |
| 2043 | * Request decoder to use this channel layout if it can (0 for default) |
| 2044 | * - encoding: unused |
| 2045 | * - decoding: Set by user. |
| 2046 | */ |
| 2047 | uint64_t request_channel_layout; |
| 2048 | |
| 2049 | /** |
| 2050 | * Type of service that the audio stream conveys. |
| 2051 | * - encoding: Set by user. |
| 2052 | * - decoding: Set by libavcodec. |
| 2053 | */ |
| 2054 | enum AVAudioServiceType audio_service_type; |
| 2055 | |
| 2056 | /** |
| 2057 | * desired sample format |
| 2058 | * - encoding: Not used. |
| 2059 | * - decoding: Set by user. |
| 2060 | * Decoder will decode to this format if it can. |
| 2061 | */ |
| 2062 | enum AVSampleFormat request_sample_fmt; |
| 2063 | |
| 2064 | #if FF_API_GET_BUFFER |
| 2065 | /** |
| 2066 | * Called at the beginning of each frame to get a buffer for it. |
| 2067 | * |
| 2068 | * The function will set AVFrame.data[], AVFrame.linesize[]. |
| 2069 | * AVFrame.extended_data[] must also be set, but it should be the same as |
| 2070 | * AVFrame.data[] except for planar audio with more channels than can fit |
| 2071 | * in AVFrame.data[]. In that case, AVFrame.data[] shall still contain as |
| 2072 | * many data pointers as it can hold. |
| 2073 | * |
| 2074 | * if CODEC_CAP_DR1 is not set then get_buffer() must call |
| 2075 | * avcodec_default_get_buffer() instead of providing buffers allocated by |
| 2076 | * some other means. |
| 2077 | * |
| 2078 | * AVFrame.data[] should be 32- or 16-byte-aligned unless the CPU doesn't |
| 2079 | * need it. avcodec_default_get_buffer() aligns the output buffer properly, |
| 2080 | * but if get_buffer() is overridden then alignment considerations should |
| 2081 | * be taken into account. |
| 2082 | * |
| 2083 | * @see avcodec_default_get_buffer() |
| 2084 | * |
| 2085 | * Video: |
| 2086 | * |
| 2087 | * If pic.reference is set then the frame will be read later by libavcodec. |
| 2088 | * avcodec_align_dimensions2() should be used to find the required width and |
| 2089 | * height, as they normally need to be rounded up to the next multiple of 16. |
| 2090 | * |
| 2091 | * If frame multithreading is used and thread_safe_callbacks is set, |
| 2092 | * it may be called from a different thread, but not from more than one at |
| 2093 | * once. Does not need to be reentrant. |
| 2094 | * |
| 2095 | * @see release_buffer(), reget_buffer() |
| 2096 | * @see avcodec_align_dimensions2() |
| 2097 | * |
| 2098 | * Audio: |
| 2099 | * |
| 2100 | * Decoders request a buffer of a particular size by setting |
| 2101 | * AVFrame.nb_samples prior to calling get_buffer(). The decoder may, |
| 2102 | * however, utilize only part of the buffer by setting AVFrame.nb_samples |
| 2103 | * to a smaller value in the output frame. |
| 2104 | * |
| 2105 | * Decoders cannot use the buffer after returning from |
| 2106 | * avcodec_decode_audio4(), so they will not call release_buffer(), as it |
| 2107 | * is assumed to be released immediately upon return. In some rare cases, |
| 2108 | * a decoder may need to call get_buffer() more than once in a single |
| 2109 | * call to avcodec_decode_audio4(). In that case, when get_buffer() is |
| 2110 | * called again after it has already been called once, the previously |
| 2111 | * acquired buffer is assumed to be released at that time and may not be |
| 2112 | * reused by the decoder. |
| 2113 | * |
| 2114 | * As a convenience, av_samples_get_buffer_size() and |
| 2115 | * av_samples_fill_arrays() in libavutil may be used by custom get_buffer() |
| 2116 | * functions to find the required data size and to fill data pointers and |
| 2117 | * linesize. In AVFrame.linesize, only linesize[0] may be set for audio |
| 2118 | * since all planes must be the same size. |
| 2119 | * |
| 2120 | * @see av_samples_get_buffer_size(), av_samples_fill_arrays() |
| 2121 | * |
| 2122 | * - encoding: unused |
| 2123 | * - decoding: Set by libavcodec, user can override. |
| 2124 | * |
| 2125 | * @deprecated use get_buffer2() |
| 2126 | */ |
| 2127 | attribute_deprecated |
| 2128 | int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic); |
| 2129 | |
| 2130 | /** |
| 2131 | * Called to release buffers which were allocated with get_buffer. |
| 2132 | * A released buffer can be reused in get_buffer(). |
| 2133 | * pic.data[*] must be set to NULL. |
| 2134 | * May be called from a different thread if frame multithreading is used, |
| 2135 | * but not by more than one thread at once, so does not need to be reentrant. |
| 2136 | * - encoding: unused |
| 2137 | * - decoding: Set by libavcodec, user can override. |
| 2138 | * |
| 2139 | * @deprecated custom freeing callbacks should be set from get_buffer2() |
| 2140 | */ |
| 2141 | attribute_deprecated |
| 2142 | void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic); |
| 2143 | |
| 2144 | /** |
| 2145 | * Called at the beginning of a frame to get cr buffer for it. |
| 2146 | * Buffer type (size, hints) must be the same. libavcodec won't check it. |
| 2147 | * libavcodec will pass previous buffer in pic, function should return |
| 2148 | * same buffer or new buffer with old frame "painted" into it. |
| 2149 | * If pic.data[0] == NULL must behave like get_buffer(). |
| 2150 | * if CODEC_CAP_DR1 is not set then reget_buffer() must call |
| 2151 | * avcodec_default_reget_buffer() instead of providing buffers allocated by |
| 2152 | * some other means. |
| 2153 | * - encoding: unused |
| 2154 | * - decoding: Set by libavcodec, user can override. |
| 2155 | */ |
| 2156 | attribute_deprecated |
| 2157 | int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic); |
| 2158 | #endif |
| 2159 | |
| 2160 | /** |
| 2161 | * This callback is called at the beginning of each frame to get data |
| 2162 | * buffer(s) for it. There may be one contiguous buffer for all the data or |
| 2163 | * there may be a buffer per each data plane or anything in between. What |
| 2164 | * this means is, you may set however many entries in buf[] you feel necessary. |
| 2165 | * Each buffer must be reference-counted using the AVBuffer API (see description |
| 2166 | * of buf[] below). |
| 2167 | * |
| 2168 | * The following fields will be set in the frame before this callback is |
| 2169 | * called: |
| 2170 | * - format |
| 2171 | * - width, height (video only) |
| 2172 | * - sample_rate, channel_layout, nb_samples (audio only) |
| 2173 | * Their values may differ from the corresponding values in |
| 2174 | * AVCodecContext. This callback must use the frame values, not the codec |
| 2175 | * context values, to calculate the required buffer size. |
| 2176 | * |
| 2177 | * This callback must fill the following fields in the frame: |
| 2178 | * - data[] |
| 2179 | * - linesize[] |
| 2180 | * - extended_data: |
| 2181 | * * if the data is planar audio with more than 8 channels, then this |
| 2182 | * callback must allocate and fill extended_data to contain all pointers |
| 2183 | * to all data planes. data[] must hold as many pointers as it can. |
| 2184 | * extended_data must be allocated with av_malloc() and will be freed in |
| 2185 | * av_frame_unref(). |
| 2186 | * * otherwise exended_data must point to data |
| 2187 | * - buf[] must contain one or more pointers to AVBufferRef structures. Each of |
| 2188 | * the frame's data and extended_data pointers must be contained in these. That |
| 2189 | * is, one AVBufferRef for each allocated chunk of memory, not necessarily one |
| 2190 | * AVBufferRef per data[] entry. See: av_buffer_create(), av_buffer_alloc(), |
| 2191 | * and av_buffer_ref(). |
| 2192 | * - extended_buf and nb_extended_buf must be allocated with av_malloc() by |
| 2193 | * this callback and filled with the extra buffers if there are more |
| 2194 | * buffers than buf[] can hold. extended_buf will be freed in |
| 2195 | * av_frame_unref(). |
| 2196 | * |
| 2197 | * If CODEC_CAP_DR1 is not set then get_buffer2() must call |
| 2198 | * avcodec_default_get_buffer2() instead of providing buffers allocated by |
| 2199 | * some other means. |
| 2200 | * |
| 2201 | * Each data plane must be aligned to the maximum required by the target |
| 2202 | * CPU. |
| 2203 | * |
| 2204 | * @see avcodec_default_get_buffer2() |
| 2205 | * |
| 2206 | * Video: |
| 2207 | * |
| 2208 | * If AV_GET_BUFFER_FLAG_REF is set in flags then the frame may be reused |
| 2209 | * (read and/or written to if it is writable) later by libavcodec. |
| 2210 | * |
| 2211 | * avcodec_align_dimensions2() should be used to find the required width and |
| 2212 | * height, as they normally need to be rounded up to the next multiple of 16. |
| 2213 | * |
| 2214 | * Some decoders do not support linesizes changing between frames. |
| 2215 | * |
| 2216 | * If frame multithreading is used and thread_safe_callbacks is set, |
| 2217 | * this callback may be called from a different thread, but not from more |
| 2218 | * than one at once. Does not need to be reentrant. |
| 2219 | * |
| 2220 | * @see avcodec_align_dimensions2() |
| 2221 | * |
| 2222 | * Audio: |
| 2223 | * |
| 2224 | * Decoders request a buffer of a particular size by setting |
| 2225 | * AVFrame.nb_samples prior to calling get_buffer2(). The decoder may, |
| 2226 | * however, utilize only part of the buffer by setting AVFrame.nb_samples |
| 2227 | * to a smaller value in the output frame. |
| 2228 | * |
| 2229 | * As a convenience, av_samples_get_buffer_size() and |
| 2230 | * av_samples_fill_arrays() in libavutil may be used by custom get_buffer2() |
| 2231 | * functions to find the required data size and to fill data pointers and |
| 2232 | * linesize. In AVFrame.linesize, only linesize[0] may be set for audio |
| 2233 | * since all planes must be the same size. |
| 2234 | * |
| 2235 | * @see av_samples_get_buffer_size(), av_samples_fill_arrays() |
| 2236 | * |
| 2237 | * - encoding: unused |
| 2238 | * - decoding: Set by libavcodec, user can override. |
| 2239 | */ |
| 2240 | int (*get_buffer2)(struct AVCodecContext *s, AVFrame *frame, int flags); |
| 2241 | |
| 2242 | /** |
| 2243 | * If non-zero, the decoded audio and video frames returned from |
| 2244 | * avcodec_decode_video2() and avcodec_decode_audio4() are reference-counted |
| 2245 | * and are valid indefinitely. The caller must free them with |
| 2246 | * av_frame_unref() when they are not needed anymore. |
| 2247 | * Otherwise, the decoded frames must not be freed by the caller and are |
| 2248 | * only valid until the next decode call. |
| 2249 | * |
| 2250 | * - encoding: unused |
| 2251 | * - decoding: set by the caller before avcodec_open2(). |
| 2252 | */ |
| 2253 | int refcounted_frames; |
| 2254 | |
| 2255 | /* - encoding parameters */ |
| 2256 | float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0) |
| 2257 | float qblur; ///< amount of qscale smoothing over time (0.0-1.0) |
| 2258 | |
| 2259 | /** |
| 2260 | * minimum quantizer |
| 2261 | * - encoding: Set by user. |
| 2262 | * - decoding: unused |
| 2263 | */ |
| 2264 | int qmin; |
| 2265 | |
| 2266 | /** |
| 2267 | * maximum quantizer |
| 2268 | * - encoding: Set by user. |
| 2269 | * - decoding: unused |
| 2270 | */ |
| 2271 | int qmax; |
| 2272 | |
| 2273 | /** |
| 2274 | * maximum quantizer difference between frames |
| 2275 | * - encoding: Set by user. |
| 2276 | * - decoding: unused |
| 2277 | */ |
| 2278 | int max_qdiff; |
| 2279 | |
| 2280 | /** |
| 2281 | * ratecontrol qmin qmax limiting method |
| 2282 | * 0-> clipping, 1-> use a nice continuous function to limit qscale within qmin/qmax. |
| 2283 | * - encoding: Set by user. |
| 2284 | * - decoding: unused |
| 2285 | */ |
| 2286 | float rc_qsquish; |
| 2287 | |
| 2288 | float rc_qmod_amp; |
| 2289 | int rc_qmod_freq; |
| 2290 | |
| 2291 | /** |
| 2292 | * decoder bitstream buffer size |
| 2293 | * - encoding: Set by user. |
| 2294 | * - decoding: unused |
| 2295 | */ |
| 2296 | int rc_buffer_size; |
| 2297 | |
| 2298 | /** |
| 2299 | * ratecontrol override, see RcOverride |
| 2300 | * - encoding: Allocated/set/freed by user. |
| 2301 | * - decoding: unused |
| 2302 | */ |
| 2303 | int rc_override_count; |
| 2304 | RcOverride *rc_override; |
| 2305 | |
| 2306 | /** |
| 2307 | * rate control equation |
| 2308 | * - encoding: Set by user |
| 2309 | * - decoding: unused |
| 2310 | */ |
| 2311 | const char *rc_eq; |
| 2312 | |
| 2313 | /** |
| 2314 | * maximum bitrate |
| 2315 | * - encoding: Set by user. |
| 2316 | * - decoding: Set by libavcodec. |
| 2317 | */ |
| 2318 | int rc_max_rate; |
| 2319 | |
| 2320 | /** |
| 2321 | * minimum bitrate |
| 2322 | * - encoding: Set by user. |
| 2323 | * - decoding: unused |
| 2324 | */ |
| 2325 | int rc_min_rate; |
| 2326 | |
| 2327 | float rc_buffer_aggressivity; |
| 2328 | |
| 2329 | /** |
| 2330 | * initial complexity for pass1 ratecontrol |
| 2331 | * - encoding: Set by user. |
| 2332 | * - decoding: unused |
| 2333 | */ |
| 2334 | float rc_initial_cplx; |
| 2335 | |
| 2336 | /** |
| 2337 | * Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow. |
| 2338 | * - encoding: Set by user. |
| 2339 | * - decoding: unused. |
| 2340 | */ |
| 2341 | float rc_max_available_vbv_use; |
| 2342 | |
| 2343 | /** |
| 2344 | * Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow. |
| 2345 | * - encoding: Set by user. |
| 2346 | * - decoding: unused. |
| 2347 | */ |
| 2348 | float rc_min_vbv_overflow_use; |
| 2349 | |
| 2350 | /** |
| 2351 | * Number of bits which should be loaded into the rc buffer before decoding starts. |
| 2352 | * - encoding: Set by user. |
| 2353 | * - decoding: unused |
| 2354 | */ |
| 2355 | int rc_initial_buffer_occupancy; |
| 2356 | |
| 2357 | #define FF_CODER_TYPE_VLC 0 |
| 2358 | #define FF_CODER_TYPE_AC 1 |
| 2359 | #define FF_CODER_TYPE_RAW 2 |
| 2360 | #define FF_CODER_TYPE_RLE 3 |
| 2361 | #if FF_API_UNUSED_MEMBERS |
| 2362 | #define FF_CODER_TYPE_DEFLATE 4 |
| 2363 | #endif /* FF_API_UNUSED_MEMBERS */ |
| 2364 | /** |
| 2365 | * coder type |
| 2366 | * - encoding: Set by user. |
| 2367 | * - decoding: unused |
| 2368 | */ |
| 2369 | int coder_type; |
| 2370 | |
| 2371 | /** |
| 2372 | * context model |
| 2373 | * - encoding: Set by user. |
| 2374 | * - decoding: unused |
| 2375 | */ |
| 2376 | int context_model; |
| 2377 | |
| 2378 | /** |
| 2379 | * minimum Lagrange multiplier |
| 2380 | * - encoding: Set by user. |
| 2381 | * - decoding: unused |
| 2382 | */ |
| 2383 | int lmin; |
| 2384 | |
| 2385 | /** |
| 2386 | * maximum Lagrange multiplier |
| 2387 | * - encoding: Set by user. |
| 2388 | * - decoding: unused |
| 2389 | */ |
| 2390 | int lmax; |
| 2391 | |
| 2392 | /** |
| 2393 | * frame skip threshold |
| 2394 | * - encoding: Set by user. |
| 2395 | * - decoding: unused |
| 2396 | */ |
| 2397 | int frame_skip_threshold; |
| 2398 | |
| 2399 | /** |
| 2400 | * frame skip factor |
| 2401 | * - encoding: Set by user. |
| 2402 | * - decoding: unused |
| 2403 | */ |
| 2404 | int frame_skip_factor; |
| 2405 | |
| 2406 | /** |
| 2407 | * frame skip exponent |
| 2408 | * - encoding: Set by user. |
| 2409 | * - decoding: unused |
| 2410 | */ |
| 2411 | int frame_skip_exp; |
| 2412 | |
| 2413 | /** |
| 2414 | * frame skip comparison function |
| 2415 | * - encoding: Set by user. |
| 2416 | * - decoding: unused |
| 2417 | */ |
| 2418 | int frame_skip_cmp; |
| 2419 | |
| 2420 | /** |
| 2421 | * trellis RD quantization |
| 2422 | * - encoding: Set by user. |
| 2423 | * - decoding: unused |
| 2424 | */ |
| 2425 | int trellis; |
| 2426 | |
| 2427 | /** |
| 2428 | * - encoding: Set by user. |
| 2429 | * - decoding: unused |
| 2430 | */ |
| 2431 | int min_prediction_order; |
| 2432 | |
| 2433 | /** |
| 2434 | * - encoding: Set by user. |
| 2435 | * - decoding: unused |
| 2436 | */ |
| 2437 | int max_prediction_order; |
| 2438 | |
| 2439 | /** |
| 2440 | * GOP timecode frame start number |
| 2441 | * - encoding: Set by user, in non drop frame format |
| 2442 | * - decoding: Set by libavcodec (timecode in the 25 bits format, -1 if unset) |
| 2443 | */ |
| 2444 | int64_t timecode_frame_start; |
| 2445 | |
| 2446 | /* The RTP callback: This function is called */ |
| 2447 | /* every time the encoder has a packet to send. */ |
| 2448 | /* It depends on the encoder if the data starts */ |
| 2449 | /* with a Start Code (it should). H.263 does. */ |
| 2450 | /* mb_nb contains the number of macroblocks */ |
| 2451 | /* encoded in the RTP payload. */ |
| 2452 | void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb); |
| 2453 | |
| 2454 | int rtp_payload_size; /* The size of the RTP payload: the coder will */ |
| 2455 | /* do its best to deliver a chunk with size */ |
| 2456 | /* below rtp_payload_size, the chunk will start */ |
| 2457 | /* with a start code on some codecs like H.263. */ |
| 2458 | /* This doesn't take account of any particular */ |
| 2459 | /* headers inside the transmitted RTP payload. */ |
| 2460 | |
| 2461 | /* statistics, used for 2-pass encoding */ |
| 2462 | int mv_bits; |
| 2463 | int header_bits; |
| 2464 | int i_tex_bits; |
| 2465 | int p_tex_bits; |
| 2466 | int i_count; |
| 2467 | int p_count; |
| 2468 | int skip_count; |
| 2469 | int misc_bits; |
| 2470 | |
| 2471 | /** |
| 2472 | * number of bits used for the previously encoded frame |
| 2473 | * - encoding: Set by libavcodec. |
| 2474 | * - decoding: unused |
| 2475 | */ |
| 2476 | int frame_bits; |
| 2477 | |
| 2478 | /** |
| 2479 | * pass1 encoding statistics output buffer |
| 2480 | * - encoding: Set by libavcodec. |
| 2481 | * - decoding: unused |
| 2482 | */ |
| 2483 | char *stats_out; |
| 2484 | |
| 2485 | /** |
| 2486 | * pass2 encoding statistics input buffer |
| 2487 | * Concatenated stuff from stats_out of pass1 should be placed here. |
| 2488 | * - encoding: Allocated/set/freed by user. |
| 2489 | * - decoding: unused |
| 2490 | */ |
| 2491 | char *stats_in; |
| 2492 | |
| 2493 | /** |
| 2494 | * Work around bugs in encoders which sometimes cannot be detected automatically. |
| 2495 | * - encoding: Set by user |
| 2496 | * - decoding: Set by user |
| 2497 | */ |
| 2498 | int workaround_bugs; |
| 2499 | #define FF_BUG_AUTODETECT 1 ///< autodetection |
| 2500 | #if FF_API_OLD_MSMPEG4 |
| 2501 | #define FF_BUG_OLD_MSMPEG4 2 |
| 2502 | #endif |
| 2503 | #define FF_BUG_XVID_ILACE 4 |
| 2504 | #define FF_BUG_UMP4 8 |
| 2505 | #define FF_BUG_NO_PADDING 16 |
| 2506 | #define FF_BUG_AMV 32 |
| 2507 | #if FF_API_AC_VLC |
| 2508 | #define FF_BUG_AC_VLC 0 ///< Will be removed, libavcodec can now handle these non-compliant files by default. |
| 2509 | #endif |
| 2510 | #define FF_BUG_QPEL_CHROMA 64 |
| 2511 | #define FF_BUG_STD_QPEL 128 |
| 2512 | #define FF_BUG_QPEL_CHROMA2 256 |
| 2513 | #define FF_BUG_DIRECT_BLOCKSIZE 512 |
| 2514 | #define FF_BUG_EDGE 1024 |
| 2515 | #define FF_BUG_HPEL_CHROMA 2048 |
| 2516 | #define FF_BUG_DC_CLIP 4096 |
| 2517 | #define FF_BUG_MS 8192 ///< Work around various bugs in Microsoft's broken decoders. |
| 2518 | #define FF_BUG_TRUNCATED 16384 |
| 2519 | |
| 2520 | /** |
| 2521 | * strictly follow the standard (MPEG4, ...). |
| 2522 | * - encoding: Set by user. |
| 2523 | * - decoding: Set by user. |
| 2524 | * Setting this to STRICT or higher means the encoder and decoder will |
| 2525 | * generally do stupid things, whereas setting it to unofficial or lower |
| 2526 | * will mean the encoder might produce output that is not supported by all |
| 2527 | * spec-compliant decoders. Decoders don't differentiate between normal, |
| 2528 | * unofficial and experimental (that is, they always try to decode things |
| 2529 | * when they can) unless they are explicitly asked to behave stupidly |
| 2530 | * (=strictly conform to the specs) |
| 2531 | */ |
| 2532 | int strict_std_compliance; |
| 2533 | #define FF_COMPLIANCE_VERY_STRICT 2 ///< Strictly conform to an older more strict version of the spec or reference software. |
| 2534 | #define FF_COMPLIANCE_STRICT 1 ///< Strictly conform to all the things in the spec no matter what consequences. |
| 2535 | #define FF_COMPLIANCE_NORMAL 0 |
| 2536 | #define FF_COMPLIANCE_UNOFFICIAL -1 ///< Allow unofficial extensions |
| 2537 | #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things. |
| 2538 | |
| 2539 | /** |
| 2540 | * error concealment flags |
| 2541 | * - encoding: unused |
| 2542 | * - decoding: Set by user. |
| 2543 | */ |
| 2544 | int error_concealment; |
| 2545 | #define FF_EC_GUESS_MVS 1 |
| 2546 | #define FF_EC_DEBLOCK 2 |
| 2547 | #define FF_EC_FAVOR_INTER 256 |
| 2548 | |
| 2549 | /** |
| 2550 | * debug |
| 2551 | * - encoding: Set by user. |
| 2552 | * - decoding: Set by user. |
| 2553 | */ |
| 2554 | int debug; |
| 2555 | #define FF_DEBUG_PICT_INFO 1 |
| 2556 | #define FF_DEBUG_RC 2 |
| 2557 | #define FF_DEBUG_BITSTREAM 4 |
| 2558 | #define FF_DEBUG_MB_TYPE 8 |
| 2559 | #define FF_DEBUG_QP 16 |
| 2560 | #if FF_API_DEBUG_MV |
| 2561 | /** |
| 2562 | * @deprecated this option does nothing |
| 2563 | */ |
| 2564 | #define FF_DEBUG_MV 32 |
| 2565 | #endif |
| 2566 | #define FF_DEBUG_DCT_COEFF 0x00000040 |
| 2567 | #define FF_DEBUG_SKIP 0x00000080 |
| 2568 | #define FF_DEBUG_STARTCODE 0x00000100 |
| 2569 | #if FF_API_UNUSED_MEMBERS |
| 2570 | #define FF_DEBUG_PTS 0x00000200 |
| 2571 | #endif /* FF_API_UNUSED_MEMBERS */ |
| 2572 | #define FF_DEBUG_ER 0x00000400 |
| 2573 | #define FF_DEBUG_MMCO 0x00000800 |
| 2574 | #define FF_DEBUG_BUGS 0x00001000 |
| 2575 | #if FF_API_DEBUG_MV |
| 2576 | #define FF_DEBUG_VIS_QP 0x00002000 ///< only access through AVOptions from outside libavcodec |
| 2577 | #define FF_DEBUG_VIS_MB_TYPE 0x00004000 ///< only access through AVOptions from outside libavcodec |
| 2578 | #endif |
| 2579 | #define FF_DEBUG_BUFFERS 0x00008000 |
| 2580 | #define FF_DEBUG_THREADS 0x00010000 |
| 2581 | #define FF_DEBUG_NOMC 0x01000000 |
| 2582 | |
| 2583 | #if FF_API_DEBUG_MV |
| 2584 | /** |
| 2585 | * debug |
| 2586 | * Code outside libavcodec should access this field using AVOptions |
| 2587 | * - encoding: Set by user. |
| 2588 | * - decoding: Set by user. |
| 2589 | */ |
| 2590 | int debug_mv; |
| 2591 | #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames |
| 2592 | #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames |
| 2593 | #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames |
| 2594 | #endif |
| 2595 | |
| 2596 | /** |
| 2597 | * Error recognition; may misdetect some more or less valid parts as errors. |
| 2598 | * - encoding: unused |
| 2599 | * - decoding: Set by user. |
| 2600 | */ |
| 2601 | int err_recognition; |
| 2602 | |
| 2603 | /** |
| 2604 | * Verify checksums embedded in the bitstream (could be of either encoded or |
| 2605 | * decoded data, depending on the codec) and print an error message on mismatch. |
| 2606 | * If AV_EF_EXPLODE is also set, a mismatching checksum will result in the |
| 2607 | * decoder returning an error. |
| 2608 | */ |
| 2609 | #define AV_EF_CRCCHECK (1<<0) |
| 2610 | #define AV_EF_BITSTREAM (1<<1) ///< detect bitstream specification deviations |
| 2611 | #define AV_EF_BUFFER (1<<2) ///< detect improper bitstream length |
| 2612 | #define AV_EF_EXPLODE (1<<3) ///< abort decoding on minor error detection |
| 2613 | |
| 2614 | #define AV_EF_IGNORE_ERR (1<<15) ///< ignore errors and continue |
| 2615 | #define AV_EF_CAREFUL (1<<16) ///< consider things that violate the spec, are fast to calculate and have not been seen in the wild as errors |
| 2616 | #define AV_EF_COMPLIANT (1<<17) ///< consider all spec non compliances as errors |
| 2617 | #define AV_EF_AGGRESSIVE (1<<18) ///< consider things that a sane encoder should not do as an error |
| 2618 | |
| 2619 | |
| 2620 | /** |
| 2621 | * opaque 64bit number (generally a PTS) that will be reordered and |
| 2622 | * output in AVFrame.reordered_opaque |
| 2623 | * - encoding: unused |
| 2624 | * - decoding: Set by user. |
| 2625 | */ |
| 2626 | int64_t reordered_opaque; |
| 2627 | |
| 2628 | /** |
| 2629 | * Hardware accelerator in use |
| 2630 | * - encoding: unused. |
| 2631 | * - decoding: Set by libavcodec |
| 2632 | */ |
| 2633 | struct AVHWAccel *hwaccel; |
| 2634 | |
| 2635 | /** |
| 2636 | * Hardware accelerator context. |
| 2637 | * For some hardware accelerators, a global context needs to be |
| 2638 | * provided by the user. In that case, this holds display-dependent |
| 2639 | * data FFmpeg cannot instantiate itself. Please refer to the |
| 2640 | * FFmpeg HW accelerator documentation to know how to fill this |
| 2641 | * is. e.g. for VA API, this is a struct vaapi_context. |
| 2642 | * - encoding: unused |
| 2643 | * - decoding: Set by user |
| 2644 | */ |
| 2645 | void *hwaccel_context; |
| 2646 | |
| 2647 | /** |
| 2648 | * error |
| 2649 | * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR. |
| 2650 | * - decoding: unused |
| 2651 | */ |
| 2652 | uint64_t error[AV_NUM_DATA_POINTERS]; |
| 2653 | |
| 2654 | /** |
| 2655 | * DCT algorithm, see FF_DCT_* below |
| 2656 | * - encoding: Set by user. |
| 2657 | * - decoding: unused |
| 2658 | */ |
| 2659 | int dct_algo; |
| 2660 | #define FF_DCT_AUTO 0 |
| 2661 | #define FF_DCT_FASTINT 1 |
| 2662 | #if FF_API_UNUSED_MEMBERS |
| 2663 | #define FF_DCT_INT 2 |
| 2664 | #endif /* FF_API_UNUSED_MEMBERS */ |
| 2665 | #define FF_DCT_MMX 3 |
| 2666 | #define FF_DCT_ALTIVEC 5 |
| 2667 | #define FF_DCT_FAAN 6 |
| 2668 | |
| 2669 | /** |
| 2670 | * IDCT algorithm, see FF_IDCT_* below. |
| 2671 | * - encoding: Set by user. |
| 2672 | * - decoding: Set by user. |
| 2673 | */ |
| 2674 | int idct_algo; |
| 2675 | #define FF_IDCT_AUTO 0 |
| 2676 | #define FF_IDCT_INT 1 |
| 2677 | #define FF_IDCT_SIMPLE 2 |
| 2678 | #define FF_IDCT_SIMPLEMMX 3 |
| 2679 | #define FF_IDCT_ARM 7 |
| 2680 | #define FF_IDCT_ALTIVEC 8 |
| 2681 | #if FF_API_ARCH_SH4 |
| 2682 | #define FF_IDCT_SH4 9 |
| 2683 | #endif |
| 2684 | #define FF_IDCT_SIMPLEARM 10 |
| 2685 | #if FF_API_UNUSED_MEMBERS |
| 2686 | #define FF_IDCT_IPP 13 |
| 2687 | #endif /* FF_API_UNUSED_MEMBERS */ |
| 2688 | #define FF_IDCT_XVID 14 |
| 2689 | #if FF_API_IDCT_XVIDMMX |
| 2690 | #define FF_IDCT_XVIDMMX 14 |
| 2691 | #endif /* FF_API_IDCT_XVIDMMX */ |
| 2692 | #define FF_IDCT_SIMPLEARMV5TE 16 |
| 2693 | #define FF_IDCT_SIMPLEARMV6 17 |
| 2694 | #if FF_API_ARCH_SPARC |
| 2695 | #define FF_IDCT_SIMPLEVIS 18 |
| 2696 | #endif |
| 2697 | #define FF_IDCT_FAAN 20 |
| 2698 | #define FF_IDCT_SIMPLENEON 22 |
| 2699 | #if FF_API_ARCH_ALPHA |
| 2700 | #define FF_IDCT_SIMPLEALPHA 23 |
| 2701 | #endif |
| 2702 | #define FF_IDCT_SIMPLEAUTO 128 |
| 2703 | |
| 2704 | /** |
| 2705 | * bits per sample/pixel from the demuxer (needed for huffyuv). |
| 2706 | * - encoding: Set by libavcodec. |
| 2707 | * - decoding: Set by user. |
| 2708 | */ |
| 2709 | int bits_per_coded_sample; |
| 2710 | |
| 2711 | /** |
| 2712 | * Bits per sample/pixel of internal libavcodec pixel/sample format. |
| 2713 | * - encoding: set by user. |
| 2714 | * - decoding: set by libavcodec. |
| 2715 | */ |
| 2716 | int bits_per_raw_sample; |
| 2717 | |
| 2718 | #if FF_API_LOWRES |
| 2719 | /** |
| 2720 | * low resolution decoding, 1-> 1/2 size, 2->1/4 size |
| 2721 | * - encoding: unused |
| 2722 | * - decoding: Set by user. |
| 2723 | * Code outside libavcodec should access this field using: |
| 2724 | * av_codec_{get,set}_lowres(avctx) |
| 2725 | */ |
| 2726 | int lowres; |
| 2727 | #endif |
| 2728 | |
| 2729 | /** |
| 2730 | * the picture in the bitstream |
| 2731 | * - encoding: Set by libavcodec. |
| 2732 | * - decoding: unused |
| 2733 | */ |
| 2734 | AVFrame *coded_frame; |
| 2735 | |
| 2736 | /** |
| 2737 | * thread count |
| 2738 | * is used to decide how many independent tasks should be passed to execute() |
| 2739 | * - encoding: Set by user. |
| 2740 | * - decoding: Set by user. |
| 2741 | */ |
| 2742 | int thread_count; |
| 2743 | |
| 2744 | /** |
| 2745 | * Which multithreading methods to use. |
| 2746 | * Use of FF_THREAD_FRAME will increase decoding delay by one frame per thread, |
| 2747 | * so clients which cannot provide future frames should not use it. |
| 2748 | * |
| 2749 | * - encoding: Set by user, otherwise the default is used. |
| 2750 | * - decoding: Set by user, otherwise the default is used. |
| 2751 | */ |
| 2752 | int thread_type; |
| 2753 | #define FF_THREAD_FRAME 1 ///< Decode more than one frame at once |
| 2754 | #define FF_THREAD_SLICE 2 ///< Decode more than one part of a single frame at once |
| 2755 | |
| 2756 | /** |
| 2757 | * Which multithreading methods are in use by the codec. |
| 2758 | * - encoding: Set by libavcodec. |
| 2759 | * - decoding: Set by libavcodec. |
| 2760 | */ |
| 2761 | int active_thread_type; |
| 2762 | |
| 2763 | /** |
| 2764 | * Set by the client if its custom get_buffer() callback can be called |
| 2765 | * synchronously from another thread, which allows faster multithreaded decoding. |
| 2766 | * draw_horiz_band() will be called from other threads regardless of this setting. |
| 2767 | * Ignored if the default get_buffer() is used. |
| 2768 | * - encoding: Set by user. |
| 2769 | * - decoding: Set by user. |
| 2770 | */ |
| 2771 | int thread_safe_callbacks; |
| 2772 | |
| 2773 | /** |
| 2774 | * The codec may call this to execute several independent things. |
| 2775 | * It will return only after finishing all tasks. |
| 2776 | * The user may replace this with some multithreaded implementation, |
| 2777 | * the default implementation will execute the parts serially. |
| 2778 | * @param count the number of things to execute |
| 2779 | * - encoding: Set by libavcodec, user can override. |
| 2780 | * - decoding: Set by libavcodec, user can override. |
| 2781 | */ |
| 2782 | int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size); |
| 2783 | |
| 2784 | /** |
| 2785 | * The codec may call this to execute several independent things. |
| 2786 | * It will return only after finishing all tasks. |
| 2787 | * The user may replace this with some multithreaded implementation, |
| 2788 | * the default implementation will execute the parts serially. |
| 2789 | * Also see avcodec_thread_init and e.g. the --enable-pthread configure option. |
| 2790 | * @param c context passed also to func |
| 2791 | * @param count the number of things to execute |
| 2792 | * @param arg2 argument passed unchanged to func |
| 2793 | * @param ret return values of executed functions, must have space for "count" values. May be NULL. |
| 2794 | * @param func function that will be called count times, with jobnr from 0 to count-1. |
| 2795 | * threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no |
| 2796 | * two instances of func executing at the same time will have the same threadnr. |
| 2797 | * @return always 0 currently, but code should handle a future improvement where when any call to func |
| 2798 | * returns < 0 no further calls to func may be done and < 0 is returned. |
| 2799 | * - encoding: Set by libavcodec, user can override. |
| 2800 | * - decoding: Set by libavcodec, user can override. |
| 2801 | */ |
| 2802 | int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count); |
| 2803 | |
| 2804 | #if FF_API_THREAD_OPAQUE |
| 2805 | /** |
| 2806 | * @deprecated this field should not be used from outside of lavc |
| 2807 | */ |
| 2808 | attribute_deprecated |
| 2809 | void *thread_opaque; |
| 2810 | #endif |
| 2811 | |
| 2812 | /** |
| 2813 | * noise vs. sse weight for the nsse comparison function |
| 2814 | * - encoding: Set by user. |
| 2815 | * - decoding: unused |
| 2816 | */ |
| 2817 | int nsse_weight; |
| 2818 | |
| 2819 | /** |
| 2820 | * profile |
| 2821 | * - encoding: Set by user. |
| 2822 | * - decoding: Set by libavcodec. |
| 2823 | */ |
| 2824 | int profile; |
| 2825 | #define FF_PROFILE_UNKNOWN -99 |
| 2826 | #define FF_PROFILE_RESERVED -100 |
| 2827 | |
| 2828 | #define FF_PROFILE_AAC_MAIN 0 |
| 2829 | #define FF_PROFILE_AAC_LOW 1 |
| 2830 | #define FF_PROFILE_AAC_SSR 2 |
| 2831 | #define FF_PROFILE_AAC_LTP 3 |
| 2832 | #define FF_PROFILE_AAC_HE 4 |
| 2833 | #define FF_PROFILE_AAC_HE_V2 28 |
| 2834 | #define FF_PROFILE_AAC_LD 22 |
| 2835 | #define FF_PROFILE_AAC_ELD 38 |
| 2836 | #define FF_PROFILE_MPEG2_AAC_LOW 128 |
| 2837 | #define FF_PROFILE_MPEG2_AAC_HE 131 |
| 2838 | |
| 2839 | #define FF_PROFILE_DTS 20 |
| 2840 | #define FF_PROFILE_DTS_ES 30 |
| 2841 | #define FF_PROFILE_DTS_96_24 40 |
| 2842 | #define FF_PROFILE_DTS_HD_HRA 50 |
| 2843 | #define FF_PROFILE_DTS_HD_MA 60 |
| 2844 | |
| 2845 | #define FF_PROFILE_MPEG2_422 0 |
| 2846 | #define FF_PROFILE_MPEG2_HIGH 1 |
| 2847 | #define FF_PROFILE_MPEG2_SS 2 |
| 2848 | #define FF_PROFILE_MPEG2_SNR_SCALABLE 3 |
| 2849 | #define FF_PROFILE_MPEG2_MAIN 4 |
| 2850 | #define FF_PROFILE_MPEG2_SIMPLE 5 |
| 2851 | |
| 2852 | #define FF_PROFILE_H264_CONSTRAINED (1<<9) // 8+1; constraint_set1_flag |
| 2853 | #define FF_PROFILE_H264_INTRA (1<<11) // 8+3; constraint_set3_flag |
| 2854 | |
| 2855 | #define FF_PROFILE_H264_BASELINE 66 |
| 2856 | #define FF_PROFILE_H264_CONSTRAINED_BASELINE (66|FF_PROFILE_H264_CONSTRAINED) |
| 2857 | #define FF_PROFILE_H264_MAIN 77 |
| 2858 | #define FF_PROFILE_H264_EXTENDED 88 |
| 2859 | #define FF_PROFILE_H264_HIGH 100 |
| 2860 | #define FF_PROFILE_H264_HIGH_10 110 |
| 2861 | #define FF_PROFILE_H264_HIGH_10_INTRA (110|FF_PROFILE_H264_INTRA) |
| 2862 | #define FF_PROFILE_H264_HIGH_422 122 |
| 2863 | #define FF_PROFILE_H264_HIGH_422_INTRA (122|FF_PROFILE_H264_INTRA) |
| 2864 | #define FF_PROFILE_H264_HIGH_444 144 |
| 2865 | #define FF_PROFILE_H264_HIGH_444_PREDICTIVE 244 |
| 2866 | #define FF_PROFILE_H264_HIGH_444_INTRA (244|FF_PROFILE_H264_INTRA) |
| 2867 | #define FF_PROFILE_H264_CAVLC_444 44 |
| 2868 | |
| 2869 | #define FF_PROFILE_VC1_SIMPLE 0 |
| 2870 | #define FF_PROFILE_VC1_MAIN 1 |
| 2871 | #define FF_PROFILE_VC1_COMPLEX 2 |
| 2872 | #define FF_PROFILE_VC1_ADVANCED 3 |
| 2873 | |
| 2874 | #define FF_PROFILE_MPEG4_SIMPLE 0 |
| 2875 | #define FF_PROFILE_MPEG4_SIMPLE_SCALABLE 1 |
| 2876 | #define FF_PROFILE_MPEG4_CORE 2 |
| 2877 | #define FF_PROFILE_MPEG4_MAIN 3 |
| 2878 | #define FF_PROFILE_MPEG4_N_BIT 4 |
| 2879 | #define FF_PROFILE_MPEG4_SCALABLE_TEXTURE 5 |
| 2880 | #define FF_PROFILE_MPEG4_SIMPLE_FACE_ANIMATION 6 |
| 2881 | #define FF_PROFILE_MPEG4_BASIC_ANIMATED_TEXTURE 7 |
| 2882 | #define FF_PROFILE_MPEG4_HYBRID 8 |
| 2883 | #define FF_PROFILE_MPEG4_ADVANCED_REAL_TIME 9 |
| 2884 | #define FF_PROFILE_MPEG4_CORE_SCALABLE 10 |
| 2885 | #define FF_PROFILE_MPEG4_ADVANCED_CODING 11 |
| 2886 | #define FF_PROFILE_MPEG4_ADVANCED_CORE 12 |
| 2887 | #define FF_PROFILE_MPEG4_ADVANCED_SCALABLE_TEXTURE 13 |
| 2888 | #define FF_PROFILE_MPEG4_SIMPLE_STUDIO 14 |
| 2889 | #define FF_PROFILE_MPEG4_ADVANCED_SIMPLE 15 |
| 2890 | |
| 2891 | #define FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_0 0 |
| 2892 | #define FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_1 1 |
| 2893 | #define FF_PROFILE_JPEG2000_CSTREAM_NO_RESTRICTION 2 |
| 2894 | #define FF_PROFILE_JPEG2000_DCINEMA_2K 3 |
| 2895 | #define FF_PROFILE_JPEG2000_DCINEMA_4K 4 |
| 2896 | |
| 2897 | |
| 2898 | #define FF_PROFILE_HEVC_MAIN 1 |
| 2899 | #define FF_PROFILE_HEVC_MAIN_10 2 |
| 2900 | #define FF_PROFILE_HEVC_MAIN_STILL_PICTURE 3 |
| 2901 | #define FF_PROFILE_HEVC_REXT 4 |
| 2902 | |
| 2903 | /** |
| 2904 | * level |
| 2905 | * - encoding: Set by user. |
| 2906 | * - decoding: Set by libavcodec. |
| 2907 | */ |
| 2908 | int level; |
| 2909 | #define FF_LEVEL_UNKNOWN -99 |
| 2910 | |
| 2911 | /** |
| 2912 | * Skip loop filtering for selected frames. |
| 2913 | * - encoding: unused |
| 2914 | * - decoding: Set by user. |
| 2915 | */ |
| 2916 | enum AVDiscard skip_loop_filter; |
| 2917 | |
| 2918 | /** |
| 2919 | * Skip IDCT/dequantization for selected frames. |
| 2920 | * - encoding: unused |
| 2921 | * - decoding: Set by user. |
| 2922 | */ |
| 2923 | enum AVDiscard skip_idct; |
| 2924 | |
| 2925 | /** |
| 2926 | * Skip decoding for selected frames. |
| 2927 | * - encoding: unused |
| 2928 | * - decoding: Set by user. |
| 2929 | */ |
| 2930 | enum AVDiscard skip_frame; |
| 2931 | |
| 2932 | /** |
| 2933 | * Header containing style information for text subtitles. |
| 2934 | * For SUBTITLE_ASS subtitle type, it should contain the whole ASS |
| 2935 | * [Script Info] and [V4+ Styles] section, plus the [Events] line and |
| 2936 | * the Format line following. It shouldn't include any Dialogue line. |
| 2937 | * - encoding: Set/allocated/freed by user (before avcodec_open2()) |
| 2938 | * - decoding: Set/allocated/freed by libavcodec (by avcodec_open2()) |
| 2939 | */ |
| 2940 | uint8_t *subtitle_header; |
| 2941 | int subtitle_header_size; |
| 2942 | |
| 2943 | #if FF_API_ERROR_RATE |
| 2944 | /** |
| 2945 | * @deprecated use the 'error_rate' private AVOption of the mpegvideo |
| 2946 | * encoders |
| 2947 | */ |
| 2948 | attribute_deprecated |
| 2949 | int error_rate; |
| 2950 | #endif |
| 2951 | |
| 2952 | #if FF_API_CODEC_PKT |
| 2953 | /** |
| 2954 | * @deprecated this field is not supposed to be accessed from outside lavc |
| 2955 | */ |
| 2956 | attribute_deprecated |
| 2957 | AVPacket *pkt; |
| 2958 | #endif |
| 2959 | |
| 2960 | /** |
| 2961 | * VBV delay coded in the last frame (in periods of a 27 MHz clock). |
| 2962 | * Used for compliant TS muxing. |
| 2963 | * - encoding: Set by libavcodec. |
| 2964 | * - decoding: unused. |
| 2965 | */ |
| 2966 | uint64_t vbv_delay; |
| 2967 | |
| 2968 | /** |
| 2969 | * Encoding only. Allow encoders to output packets that do not contain any |
| 2970 | * encoded data, only side data. |
| 2971 | * |
| 2972 | * Some encoders need to output such packets, e.g. to update some stream |
| 2973 | * parameters at the end of encoding. |
| 2974 | * |
| 2975 | * All callers are strongly recommended to set this option to 1 and update |
| 2976 | * their code to deal with such packets, since this behaviour may become |
| 2977 | * always enabled in the future (then this option will be deprecated and |
| 2978 | * later removed). To avoid ABI issues when this happens, the callers should |
| 2979 | * use AVOptions to set this field. |
| 2980 | */ |
| 2981 | int side_data_only_packets; |
| 2982 | |
| 2983 | /** |
| 2984 | * Timebase in which pkt_dts/pts and AVPacket.dts/pts are. |
| 2985 | * Code outside libavcodec should access this field using: |
| 2986 | * av_codec_{get,set}_pkt_timebase(avctx) |
| 2987 | * - encoding unused. |
| 2988 | * - decoding set by user. |
| 2989 | */ |
| 2990 | AVRational pkt_timebase; |
| 2991 | |
| 2992 | /** |
| 2993 | * AVCodecDescriptor |
| 2994 | * Code outside libavcodec should access this field using: |
| 2995 | * av_codec_{get,set}_codec_descriptor(avctx) |
| 2996 | * - encoding: unused. |
| 2997 | * - decoding: set by libavcodec. |
| 2998 | */ |
| 2999 | const AVCodecDescriptor *codec_descriptor; |
| 3000 | |
| 3001 | #if !FF_API_LOWRES |
| 3002 | /** |
| 3003 | * low resolution decoding, 1-> 1/2 size, 2->1/4 size |
| 3004 | * - encoding: unused |
| 3005 | * - decoding: Set by user. |
| 3006 | * Code outside libavcodec should access this field using: |
| 3007 | * av_codec_{get,set}_lowres(avctx) |
| 3008 | */ |
| 3009 | int lowres; |
| 3010 | #endif |
| 3011 | |
| 3012 | /** |
| 3013 | * Current statistics for PTS correction. |
| 3014 | * - decoding: maintained and used by libavcodec, not intended to be used by user apps |
| 3015 | * - encoding: unused |
| 3016 | */ |
| 3017 | int64_t pts_correction_num_faulty_pts; /// Number of incorrect PTS values so far |
| 3018 | int64_t pts_correction_num_faulty_dts; /// Number of incorrect DTS values so far |
| 3019 | int64_t pts_correction_last_pts; /// PTS of the last frame |
| 3020 | int64_t pts_correction_last_dts; /// DTS of the last frame |
| 3021 | |
| 3022 | /** |
| 3023 | * Character encoding of the input subtitles file. |
| 3024 | * - decoding: set by user |
| 3025 | * - encoding: unused |
| 3026 | */ |
| 3027 | char *sub_charenc; |
| 3028 | |
| 3029 | /** |
| 3030 | * Subtitles character encoding mode. Formats or codecs might be adjusting |
| 3031 | * this setting (if they are doing the conversion themselves for instance). |
| 3032 | * - decoding: set by libavcodec |
| 3033 | * - encoding: unused |
| 3034 | */ |
| 3035 | int sub_charenc_mode; |
| 3036 | #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) |
| 3037 | #define FF_SUB_CHARENC_MODE_AUTOMATIC 0 ///< libavcodec will select the mode itself |
| 3038 | #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 |
| 3039 | |
| 3040 | /** |
| 3041 | * Skip processing alpha if supported by codec. |
| 3042 | * Note that if the format uses pre-multiplied alpha (common with VP6, |
| 3043 | * and recommended due to better video quality/compression) |
| 3044 | * the image will look as if alpha-blended onto a black background. |
| 3045 | * However for formats that do not use pre-multiplied alpha |
| 3046 | * there might be serious artefacts (though e.g. libswscale currently |
| 3047 | * assumes pre-multiplied alpha anyway). |
| 3048 | * Code outside libavcodec should access this field using AVOptions |
| 3049 | * |
| 3050 | * - decoding: set by user |
| 3051 | * - encoding: unused |
| 3052 | */ |
| 3053 | int skip_alpha; |
| 3054 | |
| 3055 | /** |
| 3056 | * Number of samples to skip after a discontinuity |
| 3057 | * - decoding: unused |
| 3058 | * - encoding: set by libavcodec |
| 3059 | */ |
| 3060 | int seek_preroll; |
| 3061 | |
| 3062 | #if !FF_API_DEBUG_MV |
| 3063 | /** |
| 3064 | * debug motion vectors |
| 3065 | * Code outside libavcodec should access this field using AVOptions |
| 3066 | * - encoding: Set by user. |
| 3067 | * - decoding: Set by user. |
| 3068 | */ |
| 3069 | int debug_mv; |
| 3070 | #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames |
| 3071 | #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames |
| 3072 | #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames |
| 3073 | #endif |
| 3074 | |
| 3075 | /** |
| 3076 | * custom intra quantization matrix |
| 3077 | * Code outside libavcodec should access this field using av_codec_g/set_chroma_intra_matrix() |
| 3078 | * - encoding: Set by user, can be NULL. |
| 3079 | * - decoding: unused. |
| 3080 | */ |
| 3081 | uint16_t *chroma_intra_matrix; |
| 3082 | } AVCodecContext; |
| 3083 | |
| 3084 | AVRational av_codec_get_pkt_timebase (const AVCodecContext *avctx); |
| 3085 | void av_codec_set_pkt_timebase (AVCodecContext *avctx, AVRational val); |
| 3086 | |
| 3087 | const AVCodecDescriptor *av_codec_get_codec_descriptor(const AVCodecContext *avctx); |
| 3088 | void av_codec_set_codec_descriptor(AVCodecContext *avctx, const AVCodecDescriptor *desc); |
| 3089 | |
| 3090 | int av_codec_get_lowres(const AVCodecContext *avctx); |
| 3091 | void av_codec_set_lowres(AVCodecContext *avctx, int val); |
| 3092 | |
| 3093 | int av_codec_get_seek_preroll(const AVCodecContext *avctx); |
| 3094 | void av_codec_set_seek_preroll(AVCodecContext *avctx, int val); |
| 3095 | |
| 3096 | uint16_t *av_codec_get_chroma_intra_matrix(const AVCodecContext *avctx); |
| 3097 | void av_codec_set_chroma_intra_matrix(AVCodecContext *avctx, uint16_t *val); |
| 3098 | |
| 3099 | /** |
| 3100 | * AVProfile. |
| 3101 | */ |
| 3102 | typedef struct AVProfile { |
| 3103 | int profile; |
| 3104 | const char *name; ///< short name for the profile |
| 3105 | } AVProfile; |
| 3106 | |
| 3107 | typedef struct AVCodecDefault AVCodecDefault; |
| 3108 | |
| 3109 | struct AVSubtitle; |
| 3110 | |
| 3111 | /** |
| 3112 | * AVCodec. |
| 3113 | */ |
| 3114 | typedef struct AVCodec { |
| 3115 | /** |
| 3116 | * Name of the codec implementation. |
| 3117 | * The name is globally unique among encoders and among decoders (but an |
| 3118 | * encoder and a decoder can share the same name). |
| 3119 | * This is the primary way to find a codec from the user perspective. |
| 3120 | */ |
| 3121 | const char *name; |
| 3122 | /** |
| 3123 | * Descriptive name for the codec, meant to be more human readable than name. |
| 3124 | * You should use the NULL_IF_CONFIG_SMALL() macro to define it. |
| 3125 | */ |
| 3126 | const char *long_name; |
| 3127 | enum AVMediaType type; |
| 3128 | enum AVCodecID id; |
| 3129 | /** |
| 3130 | * Codec capabilities. |
| 3131 | * see CODEC_CAP_* |
| 3132 | */ |
| 3133 | int capabilities; |
| 3134 | const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0} |
| 3135 | const enum AVPixelFormat *pix_fmts; ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1 |
| 3136 | const int *supported_samplerates; ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0 |
| 3137 | const enum AVSampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1 |
| 3138 | const uint64_t *channel_layouts; ///< array of support channel layouts, or NULL if unknown. array is terminated by 0 |
| 3139 | #if FF_API_LOWRES |
| 3140 | uint8_t max_lowres; ///< maximum value for lowres supported by the decoder, no direct access, use av_codec_get_max_lowres() |
| 3141 | #endif |
| 3142 | const AVClass *priv_class; ///< AVClass for the private context |
| 3143 | const AVProfile *profiles; ///< array of recognized profiles, or NULL if unknown, array is terminated by {FF_PROFILE_UNKNOWN} |
| 3144 | |
| 3145 | /***************************************************************** |
| 3146 | * No fields below this line are part of the public API. They |
| 3147 | * may not be used outside of libavcodec and can be changed and |
| 3148 | * removed at will. |
| 3149 | * New public fields should be added right above. |
| 3150 | ***************************************************************** |
| 3151 | */ |
| 3152 | int priv_data_size; |
| 3153 | struct AVCodec *next; |
| 3154 | /** |
| 3155 | * @name Frame-level threading support functions |
| 3156 | * @{ |
| 3157 | */ |
| 3158 | /** |
| 3159 | * If defined, called on thread contexts when they are created. |
| 3160 | * If the codec allocates writable tables in init(), re-allocate them here. |
| 3161 | * priv_data will be set to a copy of the original. |
| 3162 | */ |
| 3163 | int (*init_thread_copy)(AVCodecContext *); |
| 3164 | /** |
| 3165 | * Copy necessary context variables from a previous thread context to the current one. |
| 3166 | * If not defined, the next thread will start automatically; otherwise, the codec |
| 3167 | * must call ff_thread_finish_setup(). |
| 3168 | * |
| 3169 | * dst and src will (rarely) point to the same context, in which case memcpy should be skipped. |
| 3170 | */ |
| 3171 | int (*update_thread_context)(AVCodecContext *dst, const AVCodecContext *src); |
| 3172 | /** @} */ |
| 3173 | |
| 3174 | /** |
| 3175 | * Private codec-specific defaults. |
| 3176 | */ |
| 3177 | const AVCodecDefault *defaults; |
| 3178 | |
| 3179 | /** |
| 3180 | * Initialize codec static data, called from avcodec_register(). |
| 3181 | */ |
| 3182 | void (*init_static_data)(struct AVCodec *codec); |
| 3183 | |
| 3184 | int (*init)(AVCodecContext *); |
| 3185 | int (*encode_sub)(AVCodecContext *, uint8_t *buf, int buf_size, |
| 3186 | const struct AVSubtitle *sub); |
| 3187 | /** |
| 3188 | * Encode data to an AVPacket. |
| 3189 | * |
| 3190 | * @param avctx codec context |
| 3191 | * @param avpkt output AVPacket (may contain a user-provided buffer) |
| 3192 | * @param[in] frame AVFrame containing the raw data to be encoded |
| 3193 | * @param[out] got_packet_ptr encoder sets to 0 or 1 to indicate that a |
| 3194 | * non-empty packet was returned in avpkt. |
| 3195 | * @return 0 on success, negative error code on failure |
| 3196 | */ |
| 3197 | int (*encode2)(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, |
| 3198 | int *got_packet_ptr); |
| 3199 | int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt); |
| 3200 | int (*close)(AVCodecContext *); |
| 3201 | /** |
| 3202 | * Flush buffers. |
| 3203 | * Will be called when seeking |
| 3204 | */ |
| 3205 | void (*flush)(AVCodecContext *); |
| 3206 | } AVCodec; |
| 3207 | |
| 3208 | int av_codec_get_max_lowres(const AVCodec *codec); |
| 3209 | |
| 3210 | struct MpegEncContext; |
| 3211 | |
| 3212 | /** |
| 3213 | * AVHWAccel. |
| 3214 | */ |
| 3215 | typedef struct AVHWAccel { |
| 3216 | /** |
| 3217 | * Name of the hardware accelerated codec. |
| 3218 | * The name is globally unique among encoders and among decoders (but an |
| 3219 | * encoder and a decoder can share the same name). |
| 3220 | */ |
| 3221 | const char *name; |
| 3222 | |
| 3223 | /** |
| 3224 | * Type of codec implemented by the hardware accelerator. |
| 3225 | * |
| 3226 | * See AVMEDIA_TYPE_xxx |
| 3227 | */ |
| 3228 | enum AVMediaType type; |
| 3229 | |
| 3230 | /** |
| 3231 | * Codec implemented by the hardware accelerator. |
| 3232 | * |
| 3233 | * See AV_CODEC_ID_xxx |
| 3234 | */ |
| 3235 | enum AVCodecID id; |
| 3236 | |
| 3237 | /** |
| 3238 | * Supported pixel format. |
| 3239 | * |
| 3240 | * Only hardware accelerated formats are supported here. |
| 3241 | */ |
| 3242 | enum AVPixelFormat pix_fmt; |
| 3243 | |
| 3244 | /** |
| 3245 | * Hardware accelerated codec capabilities. |
| 3246 | * see FF_HWACCEL_CODEC_CAP_* |
| 3247 | */ |
| 3248 | int capabilities; |
| 3249 | |
| 3250 | /***************************************************************** |
| 3251 | * No fields below this line are part of the public API. They |
| 3252 | * may not be used outside of libavcodec and can be changed and |
| 3253 | * removed at will. |
| 3254 | * New public fields should be added right above. |
| 3255 | ***************************************************************** |
| 3256 | */ |
| 3257 | struct AVHWAccel *next; |
| 3258 | |
| 3259 | /** |
| 3260 | * Allocate a custom buffer |
| 3261 | */ |
| 3262 | int (*alloc_frame)(AVCodecContext *avctx, AVFrame *frame); |
| 3263 | |
| 3264 | /** |
| 3265 | * Called at the beginning of each frame or field picture. |
| 3266 | * |
| 3267 | * Meaningful frame information (codec specific) is guaranteed to |
| 3268 | * be parsed at this point. This function is mandatory. |
| 3269 | * |
| 3270 | * Note that buf can be NULL along with buf_size set to 0. |
| 3271 | * Otherwise, this means the whole frame is available at this point. |
| 3272 | * |
| 3273 | * @param avctx the codec context |
| 3274 | * @param buf the frame data buffer base |
| 3275 | * @param buf_size the size of the frame in bytes |
| 3276 | * @return zero if successful, a negative value otherwise |
| 3277 | */ |
| 3278 | int (*start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size); |
| 3279 | |
| 3280 | /** |
| 3281 | * Callback for each slice. |
| 3282 | * |
| 3283 | * Meaningful slice information (codec specific) is guaranteed to |
| 3284 | * be parsed at this point. This function is mandatory. |
| 3285 | * The only exception is XvMC, that works on MB level. |
| 3286 | * |
| 3287 | * @param avctx the codec context |
| 3288 | * @param buf the slice data buffer base |
| 3289 | * @param buf_size the size of the slice in bytes |
| 3290 | * @return zero if successful, a negative value otherwise |
| 3291 | */ |
| 3292 | int (*decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size); |
| 3293 | |
| 3294 | /** |
| 3295 | * Called at the end of each frame or field picture. |
| 3296 | * |
| 3297 | * The whole picture is parsed at this point and can now be sent |
| 3298 | * to the hardware accelerator. This function is mandatory. |
| 3299 | * |
| 3300 | * @param avctx the codec context |
| 3301 | * @return zero if successful, a negative value otherwise |
| 3302 | */ |
| 3303 | int (*end_frame)(AVCodecContext *avctx); |
| 3304 | |
| 3305 | /** |
| 3306 | * Size of per-frame hardware accelerator private data. |
| 3307 | * |
| 3308 | * Private data is allocated with av_mallocz() before |
| 3309 | * AVCodecContext.get_buffer() and deallocated after |
| 3310 | * AVCodecContext.release_buffer(). |
| 3311 | */ |
| 3312 | int frame_priv_data_size; |
| 3313 | |
| 3314 | /** |
| 3315 | * Called for every Macroblock in a slice. |
| 3316 | * |
| 3317 | * XvMC uses it to replace the ff_mpv_decode_mb(). |
| 3318 | * Instead of decoding to raw picture, MB parameters are |
| 3319 | * stored in an array provided by the video driver. |
| 3320 | * |
| 3321 | * @param s the mpeg context |
| 3322 | */ |
| 3323 | void (*decode_mb)(struct MpegEncContext *s); |
| 3324 | |
| 3325 | /** |
| 3326 | * Initialize the hwaccel private data. |
| 3327 | * |
| 3328 | * This will be called from ff_get_format(), after hwaccel and |
| 3329 | * hwaccel_context are set and the hwaccel private data in AVCodecInternal |
| 3330 | * is allocated. |
| 3331 | */ |
| 3332 | int (*init)(AVCodecContext *avctx); |
| 3333 | |
| 3334 | /** |
| 3335 | * Uninitialize the hwaccel private data. |
| 3336 | * |
| 3337 | * This will be called from get_format() or avcodec_close(), after hwaccel |
| 3338 | * and hwaccel_context are already uninitialized. |
| 3339 | */ |
| 3340 | int (*uninit)(AVCodecContext *avctx); |
| 3341 | |
| 3342 | /** |
| 3343 | * Size of the private data to allocate in |
| 3344 | * AVCodecInternal.hwaccel_priv_data. |
| 3345 | */ |
| 3346 | int priv_data_size; |
| 3347 | } AVHWAccel; |
| 3348 | |
| 3349 | /** |
| 3350 | * @defgroup lavc_picture AVPicture |
| 3351 | * |
| 3352 | * Functions for working with AVPicture |
| 3353 | * @{ |
| 3354 | */ |
| 3355 | |
| 3356 | /** |
| 3357 | * Picture data structure. |
| 3358 | * |
| 3359 | * Up to four components can be stored into it, the last component is |
| 3360 | * alpha. |
| 3361 | */ |
| 3362 | typedef struct AVPicture { |
| 3363 | uint8_t *data[AV_NUM_DATA_POINTERS]; ///< pointers to the image data planes |
| 3364 | int linesize[AV_NUM_DATA_POINTERS]; ///< number of bytes per line |
| 3365 | } AVPicture; |
| 3366 | |
| 3367 | /** |
| 3368 | * @} |
| 3369 | */ |
| 3370 | |
| 3371 | enum AVSubtitleType { |
| 3372 | SUBTITLE_NONE, |
| 3373 | |
| 3374 | SUBTITLE_BITMAP, ///< A bitmap, pict will be set |
| 3375 | |
| 3376 | /** |
| 3377 | * Plain text, the text field must be set by the decoder and is |
| 3378 | * authoritative. ass and pict fields may contain approximations. |
| 3379 | */ |
| 3380 | SUBTITLE_TEXT, |
| 3381 | |
| 3382 | /** |
| 3383 | * Formatted text, the ass field must be set by the decoder and is |
| 3384 | * authoritative. pict and text fields may contain approximations. |
| 3385 | */ |
| 3386 | SUBTITLE_ASS, |
| 3387 | }; |
| 3388 | |
| 3389 | #define AV_SUBTITLE_FLAG_FORCED 0x00000001 |
| 3390 | |
| 3391 | typedef struct AVSubtitleRect { |
| 3392 | int x; ///< top left corner of pict, undefined when pict is not set |
| 3393 | int y; ///< top left corner of pict, undefined when pict is not set |
| 3394 | int w; ///< width of pict, undefined when pict is not set |
| 3395 | int h; ///< height of pict, undefined when pict is not set |
| 3396 | int nb_colors; ///< number of colors in pict, undefined when pict is not set |
| 3397 | |
| 3398 | /** |
| 3399 | * data+linesize for the bitmap of this subtitle. |
| 3400 | * can be set for text/ass as well once they where rendered |
| 3401 | */ |
| 3402 | AVPicture pict; |
| 3403 | enum AVSubtitleType type; |
| 3404 | |
| 3405 | char *text; ///< 0 terminated plain UTF-8 text |
| 3406 | |
| 3407 | /** |
| 3408 | * 0 terminated ASS/SSA compatible event line. |
| 3409 | * The presentation of this is unaffected by the other values in this |
| 3410 | * struct. |
| 3411 | */ |
| 3412 | char *ass; |
| 3413 | |
| 3414 | int flags; |
| 3415 | } AVSubtitleRect; |
| 3416 | |
| 3417 | typedef struct AVSubtitle { |
| 3418 | uint16_t format; /* 0 = graphics */ |
| 3419 | uint32_t start_display_time; /* relative to packet pts, in ms */ |
| 3420 | uint32_t end_display_time; /* relative to packet pts, in ms */ |
| 3421 | unsigned num_rects; |
| 3422 | AVSubtitleRect **rects; |
| 3423 | int64_t pts; ///< Same as packet pts, in AV_TIME_BASE |
| 3424 | } AVSubtitle; |
| 3425 | |
| 3426 | /** |
| 3427 | * If c is NULL, returns the first registered codec, |
| 3428 | * if c is non-NULL, returns the next registered codec after c, |
| 3429 | * or NULL if c is the last one. |
| 3430 | */ |
| 3431 | AVCodec *av_codec_next(const AVCodec *c); |
| 3432 | |
| 3433 | /** |
| 3434 | * Return the LIBAVCODEC_VERSION_INT constant. |
| 3435 | */ |
| 3436 | unsigned avcodec_version(void); |
| 3437 | |
| 3438 | /** |
| 3439 | * Return the libavcodec build-time configuration. |
| 3440 | */ |
| 3441 | const char *avcodec_configuration(void); |
| 3442 | |
| 3443 | /** |
| 3444 | * Return the libavcodec license. |
| 3445 | */ |
| 3446 | const char *avcodec_license(void); |
| 3447 | |
| 3448 | /** |
| 3449 | * Register the codec codec and initialize libavcodec. |
| 3450 | * |
| 3451 | * @warning either this function or avcodec_register_all() must be called |
| 3452 | * before any other libavcodec functions. |
| 3453 | * |
| 3454 | * @see avcodec_register_all() |
| 3455 | */ |
| 3456 | void avcodec_register(AVCodec *codec); |
| 3457 | |
| 3458 | /** |
| 3459 | * Register all the codecs, parsers and bitstream filters which were enabled at |
| 3460 | * configuration time. If you do not call this function you can select exactly |
| 3461 | * which formats you want to support, by using the individual registration |
| 3462 | * functions. |
| 3463 | * |
| 3464 | * @see avcodec_register |
| 3465 | * @see av_register_codec_parser |
| 3466 | * @see av_register_bitstream_filter |
| 3467 | */ |
| 3468 | void avcodec_register_all(void); |
| 3469 | |
| 3470 | /** |
| 3471 | * Allocate an AVCodecContext and set its fields to default values. The |
| 3472 | * resulting struct should be freed with avcodec_free_context(). |
| 3473 | * |
| 3474 | * @param codec if non-NULL, allocate private data and initialize defaults |
| 3475 | * for the given codec. It is illegal to then call avcodec_open2() |
| 3476 | * with a different codec. |
| 3477 | * If NULL, then the codec-specific defaults won't be initialized, |
| 3478 | * which may result in suboptimal default settings (this is |
| 3479 | * important mainly for encoders, e.g. libx264). |
| 3480 | * |
| 3481 | * @return An AVCodecContext filled with default values or NULL on failure. |
| 3482 | * @see avcodec_get_context_defaults |
| 3483 | */ |
| 3484 | AVCodecContext *avcodec_alloc_context3(const AVCodec *codec); |
| 3485 | |
| 3486 | /** |
| 3487 | * Free the codec context and everything associated with it and write NULL to |
| 3488 | * the provided pointer. |
| 3489 | */ |
| 3490 | void avcodec_free_context(AVCodecContext **avctx); |
| 3491 | |
| 3492 | /** |
| 3493 | * Set the fields of the given AVCodecContext to default values corresponding |
| 3494 | * to the given codec (defaults may be codec-dependent). |
| 3495 | * |
| 3496 | * Do not call this function if a non-NULL codec has been passed |
| 3497 | * to avcodec_alloc_context3() that allocated this AVCodecContext. |
| 3498 | * If codec is non-NULL, it is illegal to call avcodec_open2() with a |
| 3499 | * different codec on this AVCodecContext. |
| 3500 | */ |
| 3501 | int avcodec_get_context_defaults3(AVCodecContext *s, const AVCodec *codec); |
| 3502 | |
| 3503 | /** |
| 3504 | * Get the AVClass for AVCodecContext. It can be used in combination with |
| 3505 | * AV_OPT_SEARCH_FAKE_OBJ for examining options. |
| 3506 | * |
| 3507 | * @see av_opt_find(). |
| 3508 | */ |
| 3509 | const AVClass *avcodec_get_class(void); |
| 3510 | |
| 3511 | /** |
| 3512 | * Get the AVClass for AVFrame. It can be used in combination with |
| 3513 | * AV_OPT_SEARCH_FAKE_OBJ for examining options. |
| 3514 | * |
| 3515 | * @see av_opt_find(). |
| 3516 | */ |
| 3517 | const AVClass *avcodec_get_frame_class(void); |
| 3518 | |
| 3519 | /** |
| 3520 | * Get the AVClass for AVSubtitleRect. It can be used in combination with |
| 3521 | * AV_OPT_SEARCH_FAKE_OBJ for examining options. |
| 3522 | * |
| 3523 | * @see av_opt_find(). |
| 3524 | */ |
| 3525 | const AVClass *avcodec_get_subtitle_rect_class(void); |
| 3526 | |
| 3527 | /** |
| 3528 | * Copy the settings of the source AVCodecContext into the destination |
| 3529 | * AVCodecContext. The resulting destination codec context will be |
| 3530 | * unopened, i.e. you are required to call avcodec_open2() before you |
| 3531 | * can use this AVCodecContext to decode/encode video/audio data. |
| 3532 | * |
| 3533 | * @param dest target codec context, should be initialized with |
| 3534 | * avcodec_alloc_context3(NULL), but otherwise uninitialized |
| 3535 | * @param src source codec context |
| 3536 | * @return AVERROR() on error (e.g. memory allocation error), 0 on success |
| 3537 | */ |
| 3538 | int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src); |
| 3539 | |
| 3540 | #if FF_API_AVFRAME_LAVC |
| 3541 | /** |
| 3542 | * @deprecated use av_frame_alloc() |
| 3543 | */ |
| 3544 | attribute_deprecated |
| 3545 | AVFrame *avcodec_alloc_frame(void); |
| 3546 | |
| 3547 | /** |
| 3548 | * Set the fields of the given AVFrame to default values. |
| 3549 | * |
| 3550 | * @param frame The AVFrame of which the fields should be set to default values. |
| 3551 | * |
| 3552 | * @deprecated use av_frame_unref() |
| 3553 | */ |
| 3554 | attribute_deprecated |
| 3555 | void avcodec_get_frame_defaults(AVFrame *frame); |
| 3556 | |
| 3557 | /** |
| 3558 | * Free the frame and any dynamically allocated objects in it, |
| 3559 | * e.g. extended_data. |
| 3560 | * |
| 3561 | * @param frame frame to be freed. The pointer will be set to NULL. |
| 3562 | * |
| 3563 | * @warning this function does NOT free the data buffers themselves |
| 3564 | * (it does not know how, since they might have been allocated with |
| 3565 | * a custom get_buffer()). |
| 3566 | * |
| 3567 | * @deprecated use av_frame_free() |
| 3568 | */ |
| 3569 | attribute_deprecated |
| 3570 | void avcodec_free_frame(AVFrame **frame); |
| 3571 | #endif |
| 3572 | |
| 3573 | /** |
| 3574 | * Initialize the AVCodecContext to use the given AVCodec. Prior to using this |
| 3575 | * function the context has to be allocated with avcodec_alloc_context3(). |
| 3576 | * |
| 3577 | * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(), |
| 3578 | * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for |
| 3579 | * retrieving a codec. |
| 3580 | * |
| 3581 | * @warning This function is not thread safe! |
| 3582 | * |
| 3583 | * @code |
| 3584 | * avcodec_register_all(); |
| 3585 | * av_dict_set(&opts, "b", "2.5M", 0); |
| 3586 | * codec = avcodec_find_decoder(AV_CODEC_ID_H264); |
| 3587 | * if (!codec) |
| 3588 | * exit(1); |
| 3589 | * |
| 3590 | * context = avcodec_alloc_context3(codec); |
| 3591 | * |
| 3592 | * if (avcodec_open2(context, codec, opts) < 0) |
| 3593 | * exit(1); |
| 3594 | * @endcode |
| 3595 | * |
| 3596 | * @param avctx The context to initialize. |
| 3597 | * @param codec The codec to open this context for. If a non-NULL codec has been |
| 3598 | * previously passed to avcodec_alloc_context3() or |
| 3599 | * avcodec_get_context_defaults3() for this context, then this |
| 3600 | * parameter MUST be either NULL or equal to the previously passed |
| 3601 | * codec. |
| 3602 | * @param options A dictionary filled with AVCodecContext and codec-private options. |
| 3603 | * On return this object will be filled with options that were not found. |
| 3604 | * |
| 3605 | * @return zero on success, a negative value on error |
| 3606 | * @see avcodec_alloc_context3(), avcodec_find_decoder(), avcodec_find_encoder(), |
| 3607 | * av_dict_set(), av_opt_find(). |
| 3608 | */ |
| 3609 | int avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options); |
| 3610 | |
| 3611 | /** |
| 3612 | * Close a given AVCodecContext and free all the data associated with it |
| 3613 | * (but not the AVCodecContext itself). |
| 3614 | * |
| 3615 | * Calling this function on an AVCodecContext that hasn't been opened will free |
| 3616 | * the codec-specific data allocated in avcodec_alloc_context3() / |
| 3617 | * avcodec_get_context_defaults3() with a non-NULL codec. Subsequent calls will |
| 3618 | * do nothing. |
| 3619 | */ |
| 3620 | int avcodec_close(AVCodecContext *avctx); |
| 3621 | |
| 3622 | /** |
| 3623 | * Free all allocated data in the given subtitle struct. |
| 3624 | * |
| 3625 | * @param sub AVSubtitle to free. |
| 3626 | */ |
| 3627 | void avsubtitle_free(AVSubtitle *sub); |
| 3628 | |
| 3629 | /** |
| 3630 | * @} |
| 3631 | */ |
| 3632 | |
| 3633 | /** |
| 3634 | * @addtogroup lavc_packet |
| 3635 | * @{ |
| 3636 | */ |
| 3637 | |
| 3638 | #if FF_API_DESTRUCT_PACKET |
| 3639 | /** |
| 3640 | * Default packet destructor. |
| 3641 | * @deprecated use the AVBuffer API instead |
| 3642 | */ |
| 3643 | attribute_deprecated |
| 3644 | void av_destruct_packet(AVPacket *pkt); |
| 3645 | #endif |
| 3646 | |
| 3647 | /** |
| 3648 | * Initialize optional fields of a packet with default values. |
| 3649 | * |
| 3650 | * Note, this does not touch the data and size members, which have to be |
| 3651 | * initialized separately. |
| 3652 | * |
| 3653 | * @param pkt packet |
| 3654 | */ |
| 3655 | void av_init_packet(AVPacket *pkt); |
| 3656 | |
| 3657 | /** |
| 3658 | * Allocate the payload of a packet and initialize its fields with |
| 3659 | * default values. |
| 3660 | * |
| 3661 | * @param pkt packet |
| 3662 | * @param size wanted payload size |
| 3663 | * @return 0 if OK, AVERROR_xxx otherwise |
| 3664 | */ |
| 3665 | int av_new_packet(AVPacket *pkt, int size); |
| 3666 | |
| 3667 | /** |
| 3668 | * Reduce packet size, correctly zeroing padding |
| 3669 | * |
| 3670 | * @param pkt packet |
| 3671 | * @param size new size |
| 3672 | */ |
| 3673 | void av_shrink_packet(AVPacket *pkt, int size); |
| 3674 | |
| 3675 | /** |
| 3676 | * Increase packet size, correctly zeroing padding |
| 3677 | * |
| 3678 | * @param pkt packet |
| 3679 | * @param grow_by number of bytes by which to increase the size of the packet |
| 3680 | */ |
| 3681 | int av_grow_packet(AVPacket *pkt, int grow_by); |
| 3682 | |
| 3683 | /** |
| 3684 | * Initialize a reference-counted packet from av_malloc()ed data. |
| 3685 | * |
| 3686 | * @param pkt packet to be initialized. This function will set the data, size, |
| 3687 | * buf and destruct fields, all others are left untouched. |
| 3688 | * @param data Data allocated by av_malloc() to be used as packet data. If this |
| 3689 | * function returns successfully, the data is owned by the underlying AVBuffer. |
| 3690 | * The caller may not access the data through other means. |
| 3691 | * @param size size of data in bytes, without the padding. I.e. the full buffer |
| 3692 | * size is assumed to be size + FF_INPUT_BUFFER_PADDING_SIZE. |
| 3693 | * |
| 3694 | * @return 0 on success, a negative AVERROR on error |
| 3695 | */ |
| 3696 | int av_packet_from_data(AVPacket *pkt, uint8_t *data, int size); |
| 3697 | |
| 3698 | /** |
| 3699 | * @warning This is a hack - the packet memory allocation stuff is broken. The |
| 3700 | * packet is allocated if it was not really allocated. |
| 3701 | */ |
| 3702 | int av_dup_packet(AVPacket *pkt); |
| 3703 | |
| 3704 | /** |
| 3705 | * Copy packet, including contents |
| 3706 | * |
| 3707 | * @return 0 on success, negative AVERROR on fail |
| 3708 | */ |
| 3709 | int av_copy_packet(AVPacket *dst, const AVPacket *src); |
| 3710 | |
| 3711 | /** |
| 3712 | * Copy packet side data |
| 3713 | * |
| 3714 | * @return 0 on success, negative AVERROR on fail |
| 3715 | */ |
| 3716 | int av_copy_packet_side_data(AVPacket *dst, const AVPacket *src); |
| 3717 | |
| 3718 | /** |
| 3719 | * Free a packet. |
| 3720 | * |
| 3721 | * @param pkt packet to free |
| 3722 | */ |
| 3723 | void av_free_packet(AVPacket *pkt); |
| 3724 | |
| 3725 | /** |
| 3726 | * Allocate new information of a packet. |
| 3727 | * |
| 3728 | * @param pkt packet |
| 3729 | * @param type side information type |
| 3730 | * @param size side information size |
| 3731 | * @return pointer to fresh allocated data or NULL otherwise |
| 3732 | */ |
| 3733 | uint8_t* av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, |
| 3734 | int size); |
| 3735 | |
| 3736 | /** |
| 3737 | * Shrink the already allocated side data buffer |
| 3738 | * |
| 3739 | * @param pkt packet |
| 3740 | * @param type side information type |
| 3741 | * @param size new side information size |
| 3742 | * @return 0 on success, < 0 on failure |
| 3743 | */ |
| 3744 | int av_packet_shrink_side_data(AVPacket *pkt, enum AVPacketSideDataType type, |
| 3745 | int size); |
| 3746 | |
| 3747 | /** |
| 3748 | * Get side information from packet. |
| 3749 | * |
| 3750 | * @param pkt packet |
| 3751 | * @param type desired side information type |
| 3752 | * @param size pointer for side information size to store (optional) |
| 3753 | * @return pointer to data if present or NULL otherwise |
| 3754 | */ |
| 3755 | uint8_t* av_packet_get_side_data(AVPacket *pkt, enum AVPacketSideDataType type, |
| 3756 | int *size); |
| 3757 | |
| 3758 | int av_packet_merge_side_data(AVPacket *pkt); |
| 3759 | |
| 3760 | int av_packet_split_side_data(AVPacket *pkt); |
| 3761 | |
| 3762 | /** |
| 3763 | * Pack a dictionary for use in side_data. |
| 3764 | * |
| 3765 | * @param dict The dictionary to pack. |
| 3766 | * @param size pointer to store the size of the returned data |
| 3767 | * @return pointer to data if successful, NULL otherwise |
| 3768 | */ |
| 3769 | uint8_t *av_packet_pack_dictionary(AVDictionary *dict, int *size); |
| 3770 | /** |
| 3771 | * Unpack a dictionary from side_data. |
| 3772 | * |
| 3773 | * @param data data from side_data |
| 3774 | * @param size size of the data |
| 3775 | * @param dict the metadata storage dictionary |
| 3776 | * @return 0 on success, < 0 on failure |
| 3777 | */ |
| 3778 | int av_packet_unpack_dictionary(const uint8_t *data, int size, AVDictionary **dict); |
| 3779 | |
| 3780 | |
| 3781 | /** |
| 3782 | * Convenience function to free all the side data stored. |
| 3783 | * All the other fields stay untouched. |
| 3784 | * |
| 3785 | * @param pkt packet |
| 3786 | */ |
| 3787 | void av_packet_free_side_data(AVPacket *pkt); |
| 3788 | |
| 3789 | /** |
| 3790 | * Setup a new reference to the data described by a given packet |
| 3791 | * |
| 3792 | * If src is reference-counted, setup dst as a new reference to the |
| 3793 | * buffer in src. Otherwise allocate a new buffer in dst and copy the |
| 3794 | * data from src into it. |
| 3795 | * |
| 3796 | * All the other fields are copied from src. |
| 3797 | * |
| 3798 | * @see av_packet_unref |
| 3799 | * |
| 3800 | * @param dst Destination packet |
| 3801 | * @param src Source packet |
| 3802 | * |
| 3803 | * @return 0 on success, a negative AVERROR on error. |
| 3804 | */ |
| 3805 | int av_packet_ref(AVPacket *dst, const AVPacket *src); |
| 3806 | |
| 3807 | /** |
| 3808 | * Wipe the packet. |
| 3809 | * |
| 3810 | * Unreference the buffer referenced by the packet and reset the |
| 3811 | * remaining packet fields to their default values. |
| 3812 | * |
| 3813 | * @param pkt The packet to be unreferenced. |
| 3814 | */ |
| 3815 | void av_packet_unref(AVPacket *pkt); |
| 3816 | |
| 3817 | /** |
| 3818 | * Move every field in src to dst and reset src. |
| 3819 | * |
| 3820 | * @see av_packet_unref |
| 3821 | * |
| 3822 | * @param src Source packet, will be reset |
| 3823 | * @param dst Destination packet |
| 3824 | */ |
| 3825 | void av_packet_move_ref(AVPacket *dst, AVPacket *src); |
| 3826 | |
| 3827 | /** |
| 3828 | * Copy only "properties" fields from src to dst. |
| 3829 | * |
| 3830 | * Properties for the purpose of this function are all the fields |
| 3831 | * beside those related to the packet data (buf, data, size) |
| 3832 | * |
| 3833 | * @param dst Destination packet |
| 3834 | * @param src Source packet |
| 3835 | * |
| 3836 | * @return 0 on success AVERROR on failure. |
| 3837 | * |
| 3838 | */ |
| 3839 | int av_packet_copy_props(AVPacket *dst, const AVPacket *src); |
| 3840 | |
| 3841 | /** |
| 3842 | * Convert valid timing fields (timestamps / durations) in a packet from one |
| 3843 | * timebase to another. Timestamps with unknown values (AV_NOPTS_VALUE) will be |
| 3844 | * ignored. |
| 3845 | * |
| 3846 | * @param pkt packet on which the conversion will be performed |
| 3847 | * @param tb_src source timebase, in which the timing fields in pkt are |
| 3848 | * expressed |
| 3849 | * @param tb_dst destination timebase, to which the timing fields will be |
| 3850 | * converted |
| 3851 | */ |
| 3852 | void av_packet_rescale_ts(AVPacket *pkt, AVRational tb_src, AVRational tb_dst); |
| 3853 | |
| 3854 | /** |
| 3855 | * @} |
| 3856 | */ |
| 3857 | |
| 3858 | /** |
| 3859 | * @addtogroup lavc_decoding |
| 3860 | * @{ |
| 3861 | */ |
| 3862 | |
| 3863 | /** |
| 3864 | * Find a registered decoder with a matching codec ID. |
| 3865 | * |
| 3866 | * @param id AVCodecID of the requested decoder |
| 3867 | * @return A decoder if one was found, NULL otherwise. |
| 3868 | */ |
| 3869 | AVCodec *avcodec_find_decoder(enum AVCodecID id); |
| 3870 | |
| 3871 | /** |
| 3872 | * Find a registered decoder with the specified name. |
| 3873 | * |
| 3874 | * @param name name of the requested decoder |
| 3875 | * @return A decoder if one was found, NULL otherwise. |
| 3876 | */ |
| 3877 | AVCodec *avcodec_find_decoder_by_name(const char *name); |
| 3878 | |
| 3879 | #if FF_API_GET_BUFFER |
| 3880 | attribute_deprecated int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic); |
| 3881 | attribute_deprecated void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic); |
| 3882 | attribute_deprecated int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic); |
| 3883 | #endif |
| 3884 | |
| 3885 | /** |
| 3886 | * The default callback for AVCodecContext.get_buffer2(). It is made public so |
| 3887 | * it can be called by custom get_buffer2() implementations for decoders without |
| 3888 | * CODEC_CAP_DR1 set. |
| 3889 | */ |
| 3890 | int avcodec_default_get_buffer2(AVCodecContext *s, AVFrame *frame, int flags); |
| 3891 | |
| 3892 | #if FF_API_EMU_EDGE |
| 3893 | /** |
| 3894 | * Return the amount of padding in pixels which the get_buffer callback must |
| 3895 | * provide around the edge of the image for codecs which do not have the |
| 3896 | * CODEC_FLAG_EMU_EDGE flag. |
| 3897 | * |
| 3898 | * @return Required padding in pixels. |
| 3899 | * |
| 3900 | * @deprecated CODEC_FLAG_EMU_EDGE is deprecated, so this function is no longer |
| 3901 | * needed |
| 3902 | */ |
| 3903 | attribute_deprecated |
| 3904 | unsigned avcodec_get_edge_width(void); |
| 3905 | #endif |
| 3906 | |
| 3907 | /** |
| 3908 | * Modify width and height values so that they will result in a memory |
| 3909 | * buffer that is acceptable for the codec if you do not use any horizontal |
| 3910 | * padding. |
| 3911 | * |
| 3912 | * May only be used if a codec with CODEC_CAP_DR1 has been opened. |
| 3913 | */ |
| 3914 | void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height); |
| 3915 | |
| 3916 | /** |
| 3917 | * Modify width and height values so that they will result in a memory |
| 3918 | * buffer that is acceptable for the codec if you also ensure that all |
| 3919 | * line sizes are a multiple of the respective linesize_align[i]. |
| 3920 | * |
| 3921 | * May only be used if a codec with CODEC_CAP_DR1 has been opened. |
| 3922 | */ |
| 3923 | void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height, |
| 3924 | int linesize_align[AV_NUM_DATA_POINTERS]); |
| 3925 | |
| 3926 | /** |
| 3927 | * Converts AVChromaLocation to swscale x/y chroma position. |
| 3928 | * |
| 3929 | * The positions represent the chroma (0,0) position in a coordinates system |
| 3930 | * with luma (0,0) representing the origin and luma(1,1) representing 256,256 |
| 3931 | * |
| 3932 | * @param xpos horizontal chroma sample position |
| 3933 | * @param ypos vertical chroma sample position |
| 3934 | */ |
| 3935 | int avcodec_enum_to_chroma_pos(int *xpos, int *ypos, enum AVChromaLocation pos); |
| 3936 | |
| 3937 | /** |
| 3938 | * Converts swscale x/y chroma position to AVChromaLocation. |
| 3939 | * |
| 3940 | * The positions represent the chroma (0,0) position in a coordinates system |
| 3941 | * with luma (0,0) representing the origin and luma(1,1) representing 256,256 |
| 3942 | * |
| 3943 | * @param xpos horizontal chroma sample position |
| 3944 | * @param ypos vertical chroma sample position |
| 3945 | */ |
| 3946 | enum AVChromaLocation avcodec_chroma_pos_to_enum(int xpos, int ypos); |
| 3947 | |
| 3948 | #if FF_API_OLD_DECODE_AUDIO |
| 3949 | /** |
| 3950 | * Wrapper function which calls avcodec_decode_audio4. |
| 3951 | * |
| 3952 | * @deprecated Use avcodec_decode_audio4 instead. |
| 3953 | * |
| 3954 | * Decode the audio frame of size avpkt->size from avpkt->data into samples. |
| 3955 | * Some decoders may support multiple frames in a single AVPacket, such |
| 3956 | * decoders would then just decode the first frame. In this case, |
| 3957 | * avcodec_decode_audio3 has to be called again with an AVPacket that contains |
| 3958 | * the remaining data in order to decode the second frame etc. |
| 3959 | * If no frame |
| 3960 | * could be outputted, frame_size_ptr is zero. Otherwise, it is the |
| 3961 | * decompressed frame size in bytes. |
| 3962 | * |
| 3963 | * @warning You must set frame_size_ptr to the allocated size of the |
| 3964 | * output buffer before calling avcodec_decode_audio3(). |
| 3965 | * |
| 3966 | * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than |
| 3967 | * the actual read bytes because some optimized bitstream readers read 32 or 64 |
| 3968 | * bits at once and could read over the end. |
| 3969 | * |
| 3970 | * @warning The end of the input buffer avpkt->data should be set to 0 to ensure that |
| 3971 | * no overreading happens for damaged MPEG streams. |
| 3972 | * |
| 3973 | * @warning You must not provide a custom get_buffer() when using |
| 3974 | * avcodec_decode_audio3(). Doing so will override it with |
| 3975 | * avcodec_default_get_buffer. Use avcodec_decode_audio4() instead, |
| 3976 | * which does allow the application to provide a custom get_buffer(). |
| 3977 | * |
| 3978 | * @note You might have to align the input buffer avpkt->data and output buffer |
| 3979 | * samples. The alignment requirements depend on the CPU: On some CPUs it isn't |
| 3980 | * necessary at all, on others it won't work at all if not aligned and on others |
| 3981 | * it will work but it will have an impact on performance. |
| 3982 | * |
| 3983 | * In practice, avpkt->data should have 4 byte alignment at minimum and |
| 3984 | * samples should be 16 byte aligned unless the CPU doesn't need it |
| 3985 | * (AltiVec and SSE do). |
| 3986 | * |
| 3987 | * @note Codecs which have the CODEC_CAP_DELAY capability set have a delay |
| 3988 | * between input and output, these need to be fed with avpkt->data=NULL, |
| 3989 | * avpkt->size=0 at the end to return the remaining frames. |
| 3990 | * |
| 3991 | * @param avctx the codec context |
| 3992 | * @param[out] samples the output buffer, sample type in avctx->sample_fmt |
| 3993 | * If the sample format is planar, each channel plane will |
| 3994 | * be the same size, with no padding between channels. |
| 3995 | * @param[in,out] frame_size_ptr the output buffer size in bytes |
| 3996 | * @param[in] avpkt The input AVPacket containing the input buffer. |
| 3997 | * You can create such packet with av_init_packet() and by then setting |
| 3998 | * data and size, some decoders might in addition need other fields. |
| 3999 | * All decoders are designed to use the least fields possible though. |
| 4000 | * @return On error a negative value is returned, otherwise the number of bytes |
| 4001 | * used or zero if no frame data was decompressed (used) from the input AVPacket. |
| 4002 | */ |
| 4003 | attribute_deprecated int avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples, |
| 4004 | int *frame_size_ptr, |
| 4005 | AVPacket *avpkt); |
| 4006 | #endif |
| 4007 | |
| 4008 | /** |
| 4009 | * Decode the audio frame of size avpkt->size from avpkt->data into frame. |
| 4010 | * |
| 4011 | * Some decoders may support multiple frames in a single AVPacket. Such |
| 4012 | * decoders would then just decode the first frame and the return value would be |
| 4013 | * less than the packet size. In this case, avcodec_decode_audio4 has to be |
| 4014 | * called again with an AVPacket containing the remaining data in order to |
| 4015 | * decode the second frame, etc... Even if no frames are returned, the packet |
| 4016 | * needs to be fed to the decoder with remaining data until it is completely |
| 4017 | * consumed or an error occurs. |
| 4018 | * |
| 4019 | * Some decoders (those marked with CODEC_CAP_DELAY) have a delay between input |
| 4020 | * and output. This means that for some packets they will not immediately |
| 4021 | * produce decoded output and need to be flushed at the end of decoding to get |
| 4022 | * all the decoded data. Flushing is done by calling this function with packets |
| 4023 | * with avpkt->data set to NULL and avpkt->size set to 0 until it stops |
| 4024 | * returning samples. It is safe to flush even those decoders that are not |
| 4025 | * marked with CODEC_CAP_DELAY, then no samples will be returned. |
| 4026 | * |
| 4027 | * @warning The input buffer, avpkt->data must be FF_INPUT_BUFFER_PADDING_SIZE |
| 4028 | * larger than the actual read bytes because some optimized bitstream |
| 4029 | * readers read 32 or 64 bits at once and could read over the end. |
| 4030 | * |
| 4031 | * @param avctx the codec context |
| 4032 | * @param[out] frame The AVFrame in which to store decoded audio samples. |
| 4033 | * The decoder will allocate a buffer for the decoded frame by |
| 4034 | * calling the AVCodecContext.get_buffer2() callback. |
| 4035 | * When AVCodecContext.refcounted_frames is set to 1, the frame is |
| 4036 | * reference counted and the returned reference belongs to the |
| 4037 | * caller. The caller must release the frame using av_frame_unref() |
| 4038 | * when the frame is no longer needed. The caller may safely write |
| 4039 | * to the frame if av_frame_is_writable() returns 1. |
| 4040 | * When AVCodecContext.refcounted_frames is set to 0, the returned |
| 4041 | * reference belongs to the decoder and is valid only until the |
| 4042 | * next call to this function or until closing or flushing the |
| 4043 | * decoder. The caller may not write to it. |
| 4044 | * @param[out] got_frame_ptr Zero if no frame could be decoded, otherwise it is |
| 4045 | * non-zero. Note that this field being set to zero |
| 4046 | * does not mean that an error has occurred. For |
| 4047 | * decoders with CODEC_CAP_DELAY set, no given decode |
| 4048 | * call is guaranteed to produce a frame. |
| 4049 | * @param[in] avpkt The input AVPacket containing the input buffer. |
| 4050 | * At least avpkt->data and avpkt->size should be set. Some |
| 4051 | * decoders might also require additional fields to be set. |
| 4052 | * @return A negative error code is returned if an error occurred during |
| 4053 | * decoding, otherwise the number of bytes consumed from the input |
| 4054 | * AVPacket is returned. |
| 4055 | */ |
| 4056 | int avcodec_decode_audio4(AVCodecContext *avctx, AVFrame *frame, |
| 4057 | int *got_frame_ptr, const AVPacket *avpkt); |
| 4058 | |
| 4059 | /** |
| 4060 | * Decode the video frame of size avpkt->size from avpkt->data into picture. |
| 4061 | * Some decoders may support multiple frames in a single AVPacket, such |
| 4062 | * decoders would then just decode the first frame. |
| 4063 | * |
| 4064 | * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than |
| 4065 | * the actual read bytes because some optimized bitstream readers read 32 or 64 |
| 4066 | * bits at once and could read over the end. |
| 4067 | * |
| 4068 | * @warning The end of the input buffer buf should be set to 0 to ensure that |
| 4069 | * no overreading happens for damaged MPEG streams. |
| 4070 | * |
| 4071 | * @note Codecs which have the CODEC_CAP_DELAY capability set have a delay |
| 4072 | * between input and output, these need to be fed with avpkt->data=NULL, |
| 4073 | * avpkt->size=0 at the end to return the remaining frames. |
| 4074 | * |
| 4075 | * @param avctx the codec context |
| 4076 | * @param[out] picture The AVFrame in which the decoded video frame will be stored. |
| 4077 | * Use av_frame_alloc() to get an AVFrame. The codec will |
| 4078 | * allocate memory for the actual bitmap by calling the |
| 4079 | * AVCodecContext.get_buffer2() callback. |
| 4080 | * When AVCodecContext.refcounted_frames is set to 1, the frame is |
| 4081 | * reference counted and the returned reference belongs to the |
| 4082 | * caller. The caller must release the frame using av_frame_unref() |
| 4083 | * when the frame is no longer needed. The caller may safely write |
| 4084 | * to the frame if av_frame_is_writable() returns 1. |
| 4085 | * When AVCodecContext.refcounted_frames is set to 0, the returned |
| 4086 | * reference belongs to the decoder and is valid only until the |
| 4087 | * next call to this function or until closing or flushing the |
| 4088 | * decoder. The caller may not write to it. |
| 4089 | * |
| 4090 | * @param[in] avpkt The input AVPacket containing the input buffer. |
| 4091 | * You can create such packet with av_init_packet() and by then setting |
| 4092 | * data and size, some decoders might in addition need other fields like |
| 4093 | * flags&AV_PKT_FLAG_KEY. All decoders are designed to use the least |
| 4094 | * fields possible. |
| 4095 | * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero. |
| 4096 | * @return On error a negative value is returned, otherwise the number of bytes |
| 4097 | * used or zero if no frame could be decompressed. |
| 4098 | */ |
| 4099 | int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture, |
| 4100 | int *got_picture_ptr, |
| 4101 | const AVPacket *avpkt); |
| 4102 | |
| 4103 | /** |
| 4104 | * Decode a subtitle message. |
| 4105 | * Return a negative value on error, otherwise return the number of bytes used. |
| 4106 | * If no subtitle could be decompressed, got_sub_ptr is zero. |
| 4107 | * Otherwise, the subtitle is stored in *sub. |
| 4108 | * Note that CODEC_CAP_DR1 is not available for subtitle codecs. This is for |
| 4109 | * simplicity, because the performance difference is expect to be negligible |
| 4110 | * and reusing a get_buffer written for video codecs would probably perform badly |
| 4111 | * due to a potentially very different allocation pattern. |
| 4112 | * |
| 4113 | * Some decoders (those marked with CODEC_CAP_DELAY) have a delay between input |
| 4114 | * and output. This means that for some packets they will not immediately |
| 4115 | * produce decoded output and need to be flushed at the end of decoding to get |
| 4116 | * all the decoded data. Flushing is done by calling this function with packets |
| 4117 | * with avpkt->data set to NULL and avpkt->size set to 0 until it stops |
| 4118 | * returning subtitles. It is safe to flush even those decoders that are not |
| 4119 | * marked with CODEC_CAP_DELAY, then no subtitles will be returned. |
| 4120 | * |
| 4121 | * @param avctx the codec context |
| 4122 | * @param[out] sub The Preallocated AVSubtitle in which the decoded subtitle will be stored, |
| 4123 | * must be freed with avsubtitle_free if *got_sub_ptr is set. |
| 4124 | * @param[in,out] got_sub_ptr Zero if no subtitle could be decompressed, otherwise, it is nonzero. |
| 4125 | * @param[in] avpkt The input AVPacket containing the input buffer. |
| 4126 | */ |
| 4127 | int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub, |
| 4128 | int *got_sub_ptr, |
| 4129 | AVPacket *avpkt); |
| 4130 | |
| 4131 | /** |
| 4132 | * @defgroup lavc_parsing Frame parsing |
| 4133 | * @{ |
| 4134 | */ |
| 4135 | |
| 4136 | enum AVPictureStructure { |
| 4137 | AV_PICTURE_STRUCTURE_UNKNOWN, //< unknown |
| 4138 | AV_PICTURE_STRUCTURE_TOP_FIELD, //< coded as top field |
| 4139 | AV_PICTURE_STRUCTURE_BOTTOM_FIELD, //< coded as bottom field |
| 4140 | AV_PICTURE_STRUCTURE_FRAME, //< coded as frame |
| 4141 | }; |
| 4142 | |
| 4143 | typedef struct AVCodecParserContext { |
| 4144 | void *priv_data; |
| 4145 | struct AVCodecParser *parser; |
| 4146 | int64_t frame_offset; /* offset of the current frame */ |
| 4147 | int64_t cur_offset; /* current offset |
| 4148 | (incremented by each av_parser_parse()) */ |
| 4149 | int64_t next_frame_offset; /* offset of the next frame */ |
| 4150 | /* video info */ |
| 4151 | int pict_type; /* XXX: Put it back in AVCodecContext. */ |
| 4152 | /** |
| 4153 | * This field is used for proper frame duration computation in lavf. |
| 4154 | * It signals, how much longer the frame duration of the current frame |
| 4155 | * is compared to normal frame duration. |
| 4156 | * |
| 4157 | * frame_duration = (1 + repeat_pict) * time_base |
| 4158 | * |
| 4159 | * It is used by codecs like H.264 to display telecined material. |
| 4160 | */ |
| 4161 | int repeat_pict; /* XXX: Put it back in AVCodecContext. */ |
| 4162 | int64_t pts; /* pts of the current frame */ |
| 4163 | int64_t dts; /* dts of the current frame */ |
| 4164 | |
| 4165 | /* private data */ |
| 4166 | int64_t last_pts; |
| 4167 | int64_t last_dts; |
| 4168 | int fetch_timestamp; |
| 4169 | |
| 4170 | #define AV_PARSER_PTS_NB 4 |
| 4171 | int cur_frame_start_index; |
| 4172 | int64_t cur_frame_offset[AV_PARSER_PTS_NB]; |
| 4173 | int64_t cur_frame_pts[AV_PARSER_PTS_NB]; |
| 4174 | int64_t cur_frame_dts[AV_PARSER_PTS_NB]; |
| 4175 | |
| 4176 | int flags; |
| 4177 | #define PARSER_FLAG_COMPLETE_FRAMES 0x0001 |
| 4178 | #define PARSER_FLAG_ONCE 0x0002 |
| 4179 | /// Set if the parser has a valid file offset |
| 4180 | #define PARSER_FLAG_FETCHED_OFFSET 0x0004 |
| 4181 | #define PARSER_FLAG_USE_CODEC_TS 0x1000 |
| 4182 | |
| 4183 | int64_t offset; ///< byte offset from starting packet start |
| 4184 | int64_t cur_frame_end[AV_PARSER_PTS_NB]; |
| 4185 | |
| 4186 | /** |
| 4187 | * Set by parser to 1 for key frames and 0 for non-key frames. |
| 4188 | * It is initialized to -1, so if the parser doesn't set this flag, |
| 4189 | * old-style fallback using AV_PICTURE_TYPE_I picture type as key frames |
| 4190 | * will be used. |
| 4191 | */ |
| 4192 | int key_frame; |
| 4193 | |
| 4194 | /** |
| 4195 | * Time difference in stream time base units from the pts of this |
| 4196 | * packet to the point at which the output from the decoder has converged |
| 4197 | * independent from the availability of previous frames. That is, the |
| 4198 | * frames are virtually identical no matter if decoding started from |
| 4199 | * the very first frame or from this keyframe. |
| 4200 | * Is AV_NOPTS_VALUE if unknown. |
| 4201 | * This field is not the display duration of the current frame. |
| 4202 | * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY |
| 4203 | * set. |
| 4204 | * |
| 4205 | * The purpose of this field is to allow seeking in streams that have no |
| 4206 | * keyframes in the conventional sense. It corresponds to the |
| 4207 | * recovery point SEI in H.264 and match_time_delta in NUT. It is also |
| 4208 | * essential for some types of subtitle streams to ensure that all |
| 4209 | * subtitles are correctly displayed after seeking. |
| 4210 | */ |
| 4211 | int64_t convergence_duration; |
| 4212 | |
| 4213 | // Timestamp generation support: |
| 4214 | /** |
| 4215 | * Synchronization point for start of timestamp generation. |
| 4216 | * |
| 4217 | * Set to >0 for sync point, 0 for no sync point and <0 for undefined |
| 4218 | * (default). |
| 4219 | * |
| 4220 | * For example, this corresponds to presence of H.264 buffering period |
| 4221 | * SEI message. |
| 4222 | */ |
| 4223 | int dts_sync_point; |
| 4224 | |
| 4225 | /** |
| 4226 | * Offset of the current timestamp against last timestamp sync point in |
| 4227 | * units of AVCodecContext.time_base. |
| 4228 | * |
| 4229 | * Set to INT_MIN when dts_sync_point unused. Otherwise, it must |
| 4230 | * contain a valid timestamp offset. |
| 4231 | * |
| 4232 | * Note that the timestamp of sync point has usually a nonzero |
| 4233 | * dts_ref_dts_delta, which refers to the previous sync point. Offset of |
| 4234 | * the next frame after timestamp sync point will be usually 1. |
| 4235 | * |
| 4236 | * For example, this corresponds to H.264 cpb_removal_delay. |
| 4237 | */ |
| 4238 | int dts_ref_dts_delta; |
| 4239 | |
| 4240 | /** |
| 4241 | * Presentation delay of current frame in units of AVCodecContext.time_base. |
| 4242 | * |
| 4243 | * Set to INT_MIN when dts_sync_point unused. Otherwise, it must |
| 4244 | * contain valid non-negative timestamp delta (presentation time of a frame |
| 4245 | * must not lie in the past). |
| 4246 | * |
| 4247 | * This delay represents the difference between decoding and presentation |
| 4248 | * time of the frame. |
| 4249 | * |
| 4250 | * For example, this corresponds to H.264 dpb_output_delay. |
| 4251 | */ |
| 4252 | int pts_dts_delta; |
| 4253 | |
| 4254 | /** |
| 4255 | * Position of the packet in file. |
| 4256 | * |
| 4257 | * Analogous to cur_frame_pts/dts |
| 4258 | */ |
| 4259 | int64_t cur_frame_pos[AV_PARSER_PTS_NB]; |
| 4260 | |
| 4261 | /** |
| 4262 | * Byte position of currently parsed frame in stream. |
| 4263 | */ |
| 4264 | int64_t pos; |
| 4265 | |
| 4266 | /** |
| 4267 | * Previous frame byte position. |
| 4268 | */ |
| 4269 | int64_t last_pos; |
| 4270 | |
| 4271 | /** |
| 4272 | * Duration of the current frame. |
| 4273 | * For audio, this is in units of 1 / AVCodecContext.sample_rate. |
| 4274 | * For all other types, this is in units of AVCodecContext.time_base. |
| 4275 | */ |
| 4276 | int duration; |
| 4277 | |
| 4278 | enum AVFieldOrder field_order; |
| 4279 | |
| 4280 | /** |
| 4281 | * Indicate whether a picture is coded as a frame, top field or bottom field. |
| 4282 | * |
| 4283 | * For example, H.264 field_pic_flag equal to 0 corresponds to |
| 4284 | * AV_PICTURE_STRUCTURE_FRAME. An H.264 picture with field_pic_flag |
| 4285 | * equal to 1 and bottom_field_flag equal to 0 corresponds to |
| 4286 | * AV_PICTURE_STRUCTURE_TOP_FIELD. |
| 4287 | */ |
| 4288 | enum AVPictureStructure picture_structure; |
| 4289 | |
| 4290 | /** |
| 4291 | * Picture number incremented in presentation or output order. |
| 4292 | * This field may be reinitialized at the first picture of a new sequence. |
| 4293 | * |
| 4294 | * For example, this corresponds to H.264 PicOrderCnt. |
| 4295 | */ |
| 4296 | int output_picture_number; |
| 4297 | } AVCodecParserContext; |
| 4298 | |
| 4299 | typedef struct AVCodecParser { |
| 4300 | int codec_ids[5]; /* several codec IDs are permitted */ |
| 4301 | int priv_data_size; |
| 4302 | int (*parser_init)(AVCodecParserContext *s); |
| 4303 | int (*parser_parse)(AVCodecParserContext *s, |
| 4304 | AVCodecContext *avctx, |
| 4305 | const uint8_t **poutbuf, int *poutbuf_size, |
| 4306 | const uint8_t *buf, int buf_size); |
| 4307 | void (*parser_close)(AVCodecParserContext *s); |
| 4308 | int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size); |
| 4309 | struct AVCodecParser *next; |
| 4310 | } AVCodecParser; |
| 4311 | |
| 4312 | AVCodecParser *av_parser_next(const AVCodecParser *c); |
| 4313 | |
| 4314 | void av_register_codec_parser(AVCodecParser *parser); |
| 4315 | AVCodecParserContext *av_parser_init(int codec_id); |
| 4316 | |
| 4317 | /** |
| 4318 | * Parse a packet. |
| 4319 | * |
| 4320 | * @param s parser context. |
| 4321 | * @param avctx codec context. |
| 4322 | * @param poutbuf set to pointer to parsed buffer or NULL if not yet finished. |
| 4323 | * @param poutbuf_size set to size of parsed buffer or zero if not yet finished. |
| 4324 | * @param buf input buffer. |
| 4325 | * @param buf_size input length, to signal EOF, this should be 0 (so that the last frame can be output). |
| 4326 | * @param pts input presentation timestamp. |
| 4327 | * @param dts input decoding timestamp. |
| 4328 | * @param pos input byte position in stream. |
| 4329 | * @return the number of bytes of the input bitstream used. |
| 4330 | * |
| 4331 | * Example: |
| 4332 | * @code |
| 4333 | * while(in_len){ |
| 4334 | * len = av_parser_parse2(myparser, AVCodecContext, &data, &size, |
| 4335 | * in_data, in_len, |
| 4336 | * pts, dts, pos); |
| 4337 | * in_data += len; |
| 4338 | * in_len -= len; |
| 4339 | * |
| 4340 | * if(size) |
| 4341 | * decode_frame(data, size); |
| 4342 | * } |
| 4343 | * @endcode |
| 4344 | */ |
| 4345 | int av_parser_parse2(AVCodecParserContext *s, |
| 4346 | AVCodecContext *avctx, |
| 4347 | uint8_t **poutbuf, int *poutbuf_size, |
| 4348 | const uint8_t *buf, int buf_size, |
| 4349 | int64_t pts, int64_t dts, |
| 4350 | int64_t pos); |
| 4351 | |
| 4352 | /** |
| 4353 | * @return 0 if the output buffer is a subset of the input, 1 if it is allocated and must be freed |
| 4354 | * @deprecated use AVBitStreamFilter |
| 4355 | */ |
| 4356 | int av_parser_change(AVCodecParserContext *s, |
| 4357 | AVCodecContext *avctx, |
| 4358 | uint8_t **poutbuf, int *poutbuf_size, |
| 4359 | const uint8_t *buf, int buf_size, int keyframe); |
| 4360 | void av_parser_close(AVCodecParserContext *s); |
| 4361 | |
| 4362 | /** |
| 4363 | * @} |
| 4364 | * @} |
| 4365 | */ |
| 4366 | |
| 4367 | /** |
| 4368 | * @addtogroup lavc_encoding |
| 4369 | * @{ |
| 4370 | */ |
| 4371 | |
| 4372 | /** |
| 4373 | * Find a registered encoder with a matching codec ID. |
| 4374 | * |
| 4375 | * @param id AVCodecID of the requested encoder |
| 4376 | * @return An encoder if one was found, NULL otherwise. |
| 4377 | */ |
| 4378 | AVCodec *avcodec_find_encoder(enum AVCodecID id); |
| 4379 | |
| 4380 | /** |
| 4381 | * Find a registered encoder with the specified name. |
| 4382 | * |
| 4383 | * @param name name of the requested encoder |
| 4384 | * @return An encoder if one was found, NULL otherwise. |
| 4385 | */ |
| 4386 | AVCodec *avcodec_find_encoder_by_name(const char *name); |
| 4387 | |
| 4388 | #if FF_API_OLD_ENCODE_AUDIO |
| 4389 | /** |
| 4390 | * Encode an audio frame from samples into buf. |
| 4391 | * |
| 4392 | * @deprecated Use avcodec_encode_audio2 instead. |
| 4393 | * |
| 4394 | * @note The output buffer should be at least FF_MIN_BUFFER_SIZE bytes large. |
| 4395 | * However, for codecs with avctx->frame_size equal to 0 (e.g. PCM) the user |
| 4396 | * will know how much space is needed because it depends on the value passed |
| 4397 | * in buf_size as described below. In that case a lower value can be used. |
| 4398 | * |
| 4399 | * @param avctx the codec context |
| 4400 | * @param[out] buf the output buffer |
| 4401 | * @param[in] buf_size the output buffer size |
| 4402 | * @param[in] samples the input buffer containing the samples |
| 4403 | * The number of samples read from this buffer is frame_size*channels, |
| 4404 | * both of which are defined in avctx. |
| 4405 | * For codecs which have avctx->frame_size equal to 0 (e.g. PCM) the number of |
| 4406 | * samples read from samples is equal to: |
| 4407 | * buf_size * 8 / (avctx->channels * av_get_bits_per_sample(avctx->codec_id)) |
| 4408 | * This also implies that av_get_bits_per_sample() must not return 0 for these |
| 4409 | * codecs. |
| 4410 | * @return On error a negative value is returned, on success zero or the number |
| 4411 | * of bytes used to encode the data read from the input buffer. |
| 4412 | */ |
| 4413 | int attribute_deprecated avcodec_encode_audio(AVCodecContext *avctx, |
| 4414 | uint8_t *buf, int buf_size, |
| 4415 | const short *samples); |
| 4416 | #endif |
| 4417 | |
| 4418 | /** |
| 4419 | * Encode a frame of audio. |
| 4420 | * |
| 4421 | * Takes input samples from frame and writes the next output packet, if |
| 4422 | * available, to avpkt. The output packet does not necessarily contain data for |
| 4423 | * the most recent frame, as encoders can delay, split, and combine input frames |
| 4424 | * internally as needed. |
| 4425 | * |
| 4426 | * @param avctx codec context |
| 4427 | * @param avpkt output AVPacket. |
| 4428 | * The user can supply an output buffer by setting |
| 4429 | * avpkt->data and avpkt->size prior to calling the |
| 4430 | * function, but if the size of the user-provided data is not |
| 4431 | * large enough, encoding will fail. If avpkt->data and |
| 4432 | * avpkt->size are set, avpkt->destruct must also be set. All |
| 4433 | * other AVPacket fields will be reset by the encoder using |
| 4434 | * av_init_packet(). If avpkt->data is NULL, the encoder will |
| 4435 | * allocate it. The encoder will set avpkt->size to the size |
| 4436 | * of the output packet. |
| 4437 | * |
| 4438 | * If this function fails or produces no output, avpkt will be |
| 4439 | * freed using av_free_packet() (i.e. avpkt->destruct will be |
| 4440 | * called to free the user supplied buffer). |
| 4441 | * @param[in] frame AVFrame containing the raw audio data to be encoded. |
| 4442 | * May be NULL when flushing an encoder that has the |
| 4443 | * CODEC_CAP_DELAY capability set. |
| 4444 | * If CODEC_CAP_VARIABLE_FRAME_SIZE is set, then each frame |
| 4445 | * can have any number of samples. |
| 4446 | * If it is not set, frame->nb_samples must be equal to |
| 4447 | * avctx->frame_size for all frames except the last. |
| 4448 | * The final frame may be smaller than avctx->frame_size. |
| 4449 | * @param[out] got_packet_ptr This field is set to 1 by libavcodec if the |
| 4450 | * output packet is non-empty, and to 0 if it is |
| 4451 | * empty. If the function returns an error, the |
| 4452 | * packet can be assumed to be invalid, and the |
| 4453 | * value of got_packet_ptr is undefined and should |
| 4454 | * not be used. |
| 4455 | * @return 0 on success, negative error code on failure |
| 4456 | */ |
| 4457 | int avcodec_encode_audio2(AVCodecContext *avctx, AVPacket *avpkt, |
| 4458 | const AVFrame *frame, int *got_packet_ptr); |
| 4459 | |
| 4460 | #if FF_API_OLD_ENCODE_VIDEO |
| 4461 | /** |
| 4462 | * @deprecated use avcodec_encode_video2() instead. |
| 4463 | * |
| 4464 | * Encode a video frame from pict into buf. |
| 4465 | * The input picture should be |
| 4466 | * stored using a specific format, namely avctx.pix_fmt. |
| 4467 | * |
| 4468 | * @param avctx the codec context |
| 4469 | * @param[out] buf the output buffer for the bitstream of encoded frame |
| 4470 | * @param[in] buf_size the size of the output buffer in bytes |
| 4471 | * @param[in] pict the input picture to encode |
| 4472 | * @return On error a negative value is returned, on success zero or the number |
| 4473 | * of bytes used from the output buffer. |
| 4474 | */ |
| 4475 | attribute_deprecated |
| 4476 | int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size, |
| 4477 | const AVFrame *pict); |
| 4478 | #endif |
| 4479 | |
| 4480 | /** |
| 4481 | * Encode a frame of video. |
| 4482 | * |
| 4483 | * Takes input raw video data from frame and writes the next output packet, if |
| 4484 | * available, to avpkt. The output packet does not necessarily contain data for |
| 4485 | * the most recent frame, as encoders can delay and reorder input frames |
| 4486 | * internally as needed. |
| 4487 | * |
| 4488 | * @param avctx codec context |
| 4489 | * @param avpkt output AVPacket. |
| 4490 | * The user can supply an output buffer by setting |
| 4491 | * avpkt->data and avpkt->size prior to calling the |
| 4492 | * function, but if the size of the user-provided data is not |
| 4493 | * large enough, encoding will fail. All other AVPacket fields |
| 4494 | * will be reset by the encoder using av_init_packet(). If |
| 4495 | * avpkt->data is NULL, the encoder will allocate it. |
| 4496 | * The encoder will set avpkt->size to the size of the |
| 4497 | * output packet. The returned data (if any) belongs to the |
| 4498 | * caller, he is responsible for freeing it. |
| 4499 | * |
| 4500 | * If this function fails or produces no output, avpkt will be |
| 4501 | * freed using av_free_packet() (i.e. avpkt->destruct will be |
| 4502 | * called to free the user supplied buffer). |
| 4503 | * @param[in] frame AVFrame containing the raw video data to be encoded. |
| 4504 | * May be NULL when flushing an encoder that has the |
| 4505 | * CODEC_CAP_DELAY capability set. |
| 4506 | * @param[out] got_packet_ptr This field is set to 1 by libavcodec if the |
| 4507 | * output packet is non-empty, and to 0 if it is |
| 4508 | * empty. If the function returns an error, the |
| 4509 | * packet can be assumed to be invalid, and the |
| 4510 | * value of got_packet_ptr is undefined and should |
| 4511 | * not be used. |
| 4512 | * @return 0 on success, negative error code on failure |
| 4513 | */ |
| 4514 | int avcodec_encode_video2(AVCodecContext *avctx, AVPacket *avpkt, |
| 4515 | const AVFrame *frame, int *got_packet_ptr); |
| 4516 | |
| 4517 | int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size, |
| 4518 | const AVSubtitle *sub); |
| 4519 | |
| 4520 | |
| 4521 | /** |
| 4522 | * @} |
| 4523 | */ |
| 4524 | |
| 4525 | #if FF_API_AVCODEC_RESAMPLE |
| 4526 | /** |
| 4527 | * @defgroup lavc_resample Audio resampling |
| 4528 | * @ingroup libavc |
| 4529 | * @deprecated use libswresample instead |
| 4530 | * |
| 4531 | * @{ |
| 4532 | */ |
| 4533 | struct ReSampleContext; |
| 4534 | struct AVResampleContext; |
| 4535 | |
| 4536 | typedef struct ReSampleContext ReSampleContext; |
| 4537 | |
| 4538 | /** |
| 4539 | * Initialize audio resampling context. |
| 4540 | * |
| 4541 | * @param output_channels number of output channels |
| 4542 | * @param input_channels number of input channels |
| 4543 | * @param output_rate output sample rate |
| 4544 | * @param input_rate input sample rate |
| 4545 | * @param sample_fmt_out requested output sample format |
| 4546 | * @param sample_fmt_in input sample format |
| 4547 | * @param filter_length length of each FIR filter in the filterbank relative to the cutoff frequency |
| 4548 | * @param log2_phase_count log2 of the number of entries in the polyphase filterbank |
| 4549 | * @param linear if 1 then the used FIR filter will be linearly interpolated |
| 4550 | between the 2 closest, if 0 the closest will be used |
| 4551 | * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate |
| 4552 | * @return allocated ReSampleContext, NULL if error occurred |
| 4553 | */ |
| 4554 | attribute_deprecated |
| 4555 | ReSampleContext *av_audio_resample_init(int output_channels, int input_channels, |
| 4556 | int output_rate, int input_rate, |
| 4557 | enum AVSampleFormat sample_fmt_out, |
| 4558 | enum AVSampleFormat sample_fmt_in, |
| 4559 | int filter_length, int log2_phase_count, |
| 4560 | int linear, double cutoff); |
| 4561 | |
| 4562 | attribute_deprecated |
| 4563 | int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples); |
| 4564 | |
| 4565 | /** |
| 4566 | * Free resample context. |
| 4567 | * |
| 4568 | * @param s a non-NULL pointer to a resample context previously |
| 4569 | * created with av_audio_resample_init() |
| 4570 | */ |
| 4571 | attribute_deprecated |
| 4572 | void audio_resample_close(ReSampleContext *s); |
| 4573 | |
| 4574 | |
| 4575 | /** |
| 4576 | * Initialize an audio resampler. |
| 4577 | * Note, if either rate is not an integer then simply scale both rates up so they are. |
| 4578 | * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq |
| 4579 | * @param log2_phase_count log2 of the number of entries in the polyphase filterbank |
| 4580 | * @param linear If 1 then the used FIR filter will be linearly interpolated |
| 4581 | between the 2 closest, if 0 the closest will be used |
| 4582 | * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate |
| 4583 | */ |
| 4584 | attribute_deprecated |
| 4585 | struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff); |
| 4586 | |
| 4587 | /** |
| 4588 | * Resample an array of samples using a previously configured context. |
| 4589 | * @param src an array of unconsumed samples |
| 4590 | * @param consumed the number of samples of src which have been consumed are returned here |
| 4591 | * @param src_size the number of unconsumed samples available |
| 4592 | * @param dst_size the amount of space in samples available in dst |
| 4593 | * @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. |
| 4594 | * @return the number of samples written in dst or -1 if an error occurred |
| 4595 | */ |
| 4596 | attribute_deprecated |
| 4597 | int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx); |
| 4598 | |
| 4599 | |
| 4600 | /** |
| 4601 | * Compensate samplerate/timestamp drift. The compensation is done by changing |
| 4602 | * the resampler parameters, so no audible clicks or similar distortions occur |
| 4603 | * @param compensation_distance distance in output samples over which the compensation should be performed |
| 4604 | * @param sample_delta number of output samples which should be output less |
| 4605 | * |
| 4606 | * example: av_resample_compensate(c, 10, 500) |
| 4607 | * here instead of 510 samples only 500 samples would be output |
| 4608 | * |
| 4609 | * note, due to rounding the actual compensation might be slightly different, |
| 4610 | * especially if the compensation_distance is large and the in_rate used during init is small |
| 4611 | */ |
| 4612 | attribute_deprecated |
| 4613 | void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance); |
| 4614 | attribute_deprecated |
| 4615 | void av_resample_close(struct AVResampleContext *c); |
| 4616 | |
| 4617 | /** |
| 4618 | * @} |
| 4619 | */ |
| 4620 | #endif |
| 4621 | |
| 4622 | /** |
| 4623 | * @addtogroup lavc_picture |
| 4624 | * @{ |
| 4625 | */ |
| 4626 | |
| 4627 | /** |
| 4628 | * Allocate memory for the pixels of a picture and setup the AVPicture |
| 4629 | * fields for it. |
| 4630 | * |
| 4631 | * Call avpicture_free() to free it. |
| 4632 | * |
| 4633 | * @param picture the picture structure to be filled in |
| 4634 | * @param pix_fmt the pixel format of the picture |
| 4635 | * @param width the width of the picture |
| 4636 | * @param height the height of the picture |
| 4637 | * @return zero if successful, a negative error code otherwise |
| 4638 | * |
| 4639 | * @see av_image_alloc(), avpicture_fill() |
| 4640 | */ |
| 4641 | int avpicture_alloc(AVPicture *picture, enum AVPixelFormat pix_fmt, int width, int height); |
| 4642 | |
| 4643 | /** |
| 4644 | * Free a picture previously allocated by avpicture_alloc(). |
| 4645 | * The data buffer used by the AVPicture is freed, but the AVPicture structure |
| 4646 | * itself is not. |
| 4647 | * |
| 4648 | * @param picture the AVPicture to be freed |
| 4649 | */ |
| 4650 | void avpicture_free(AVPicture *picture); |
| 4651 | |
| 4652 | /** |
| 4653 | * Setup the picture fields based on the specified image parameters |
| 4654 | * and the provided image data buffer. |
| 4655 | * |
| 4656 | * The picture fields are filled in by using the image data buffer |
| 4657 | * pointed to by ptr. |
| 4658 | * |
| 4659 | * If ptr is NULL, the function will fill only the picture linesize |
| 4660 | * array and return the required size for the image buffer. |
| 4661 | * |
| 4662 | * To allocate an image buffer and fill the picture data in one call, |
| 4663 | * use avpicture_alloc(). |
| 4664 | * |
| 4665 | * @param picture the picture to be filled in |
| 4666 | * @param ptr buffer where the image data is stored, or NULL |
| 4667 | * @param pix_fmt the pixel format of the image |
| 4668 | * @param width the width of the image in pixels |
| 4669 | * @param height the height of the image in pixels |
| 4670 | * @return the size in bytes required for src, a negative error code |
| 4671 | * in case of failure |
| 4672 | * |
| 4673 | * @see av_image_fill_arrays() |
| 4674 | */ |
| 4675 | int avpicture_fill(AVPicture *picture, const uint8_t *ptr, |
| 4676 | enum AVPixelFormat pix_fmt, int width, int height); |
| 4677 | |
| 4678 | /** |
| 4679 | * Copy pixel data from an AVPicture into a buffer. |
| 4680 | * |
| 4681 | * avpicture_get_size() can be used to compute the required size for |
| 4682 | * the buffer to fill. |
| 4683 | * |
| 4684 | * @param src source picture with filled data |
| 4685 | * @param pix_fmt picture pixel format |
| 4686 | * @param width picture width |
| 4687 | * @param height picture height |
| 4688 | * @param dest destination buffer |
| 4689 | * @param dest_size destination buffer size in bytes |
| 4690 | * @return the number of bytes written to dest, or a negative value |
| 4691 | * (error code) on error, for example if the destination buffer is not |
| 4692 | * big enough |
| 4693 | * |
| 4694 | * @see av_image_copy_to_buffer() |
| 4695 | */ |
| 4696 | int avpicture_layout(const AVPicture *src, enum AVPixelFormat pix_fmt, |
| 4697 | int width, int height, |
| 4698 | unsigned char *dest, int dest_size); |
| 4699 | |
| 4700 | /** |
| 4701 | * Calculate the size in bytes that a picture of the given width and height |
| 4702 | * would occupy if stored in the given picture format. |
| 4703 | * |
| 4704 | * @param pix_fmt picture pixel format |
| 4705 | * @param width picture width |
| 4706 | * @param height picture height |
| 4707 | * @return the computed picture buffer size or a negative error code |
| 4708 | * in case of error |
| 4709 | * |
| 4710 | * @see av_image_get_buffer_size(). |
| 4711 | */ |
| 4712 | int avpicture_get_size(enum AVPixelFormat pix_fmt, int width, int height); |
| 4713 | |
| 4714 | #if FF_API_DEINTERLACE |
| 4715 | /** |
| 4716 | * deinterlace - if not supported return -1 |
| 4717 | * |
| 4718 | * @deprecated - use yadif (in libavfilter) instead |
| 4719 | */ |
| 4720 | attribute_deprecated |
| 4721 | int avpicture_deinterlace(AVPicture *dst, const AVPicture *src, |
| 4722 | enum AVPixelFormat pix_fmt, int width, int height); |
| 4723 | #endif |
| 4724 | /** |
| 4725 | * Copy image src to dst. Wraps av_image_copy(). |
| 4726 | */ |
| 4727 | void av_picture_copy(AVPicture *dst, const AVPicture *src, |
| 4728 | enum AVPixelFormat pix_fmt, int width, int height); |
| 4729 | |
| 4730 | /** |
| 4731 | * Crop image top and left side. |
| 4732 | */ |
| 4733 | int av_picture_crop(AVPicture *dst, const AVPicture *src, |
| 4734 | enum AVPixelFormat pix_fmt, int top_band, int left_band); |
| 4735 | |
| 4736 | /** |
| 4737 | * Pad image. |
| 4738 | */ |
| 4739 | int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, enum AVPixelFormat pix_fmt, |
| 4740 | int padtop, int padbottom, int padleft, int padright, int *color); |
| 4741 | |
| 4742 | /** |
| 4743 | * @} |
| 4744 | */ |
| 4745 | |
| 4746 | /** |
| 4747 | * @defgroup lavc_misc Utility functions |
| 4748 | * @ingroup libavc |
| 4749 | * |
| 4750 | * Miscellaneous utility functions related to both encoding and decoding |
| 4751 | * (or neither). |
| 4752 | * @{ |
| 4753 | */ |
| 4754 | |
| 4755 | /** |
| 4756 | * @defgroup lavc_misc_pixfmt Pixel formats |
| 4757 | * |
| 4758 | * Functions for working with pixel formats. |
| 4759 | * @{ |
| 4760 | */ |
| 4761 | |
| 4762 | /** |
| 4763 | * Utility function to access log2_chroma_w log2_chroma_h from |
| 4764 | * the pixel format AVPixFmtDescriptor. |
| 4765 | * |
| 4766 | * This function asserts that pix_fmt is valid. See av_pix_fmt_get_chroma_sub_sample |
| 4767 | * for one that returns a failure code and continues in case of invalid |
| 4768 | * pix_fmts. |
| 4769 | * |
| 4770 | * @param[in] pix_fmt the pixel format |
| 4771 | * @param[out] h_shift store log2_chroma_w |
| 4772 | * @param[out] v_shift store log2_chroma_h |
| 4773 | * |
| 4774 | * @see av_pix_fmt_get_chroma_sub_sample |
| 4775 | */ |
| 4776 | |
| 4777 | void avcodec_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int *v_shift); |
| 4778 | |
| 4779 | /** |
| 4780 | * Return a value representing the fourCC code associated to the |
| 4781 | * pixel format pix_fmt, or 0 if no associated fourCC code can be |
| 4782 | * found. |
| 4783 | */ |
| 4784 | unsigned int avcodec_pix_fmt_to_codec_tag(enum AVPixelFormat pix_fmt); |
| 4785 | |
| 4786 | /** |
| 4787 | * @deprecated see av_get_pix_fmt_loss() |
| 4788 | */ |
| 4789 | int avcodec_get_pix_fmt_loss(enum AVPixelFormat dst_pix_fmt, enum AVPixelFormat src_pix_fmt, |
| 4790 | int has_alpha); |
| 4791 | |
| 4792 | /** |
| 4793 | * Find the best pixel format to convert to given a certain source pixel |
| 4794 | * format. When converting from one pixel format to another, information loss |
| 4795 | * may occur. For example, when converting from RGB24 to GRAY, the color |
| 4796 | * information will be lost. Similarly, other losses occur when converting from |
| 4797 | * some formats to other formats. avcodec_find_best_pix_fmt_of_2() searches which of |
| 4798 | * the given pixel formats should be used to suffer the least amount of loss. |
| 4799 | * The pixel formats from which it chooses one, are determined by the |
| 4800 | * pix_fmt_list parameter. |
| 4801 | * |
| 4802 | * |
| 4803 | * @param[in] pix_fmt_list AV_PIX_FMT_NONE terminated array of pixel formats to choose from |
| 4804 | * @param[in] src_pix_fmt source pixel format |
| 4805 | * @param[in] has_alpha Whether the source pixel format alpha channel is used. |
| 4806 | * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur. |
| 4807 | * @return The best pixel format to convert to or -1 if none was found. |
| 4808 | */ |
| 4809 | enum AVPixelFormat avcodec_find_best_pix_fmt_of_list(const enum AVPixelFormat *pix_fmt_list, |
| 4810 | enum AVPixelFormat src_pix_fmt, |
| 4811 | int has_alpha, int *loss_ptr); |
| 4812 | |
| 4813 | /** |
| 4814 | * @deprecated see av_find_best_pix_fmt_of_2() |
| 4815 | */ |
| 4816 | enum AVPixelFormat avcodec_find_best_pix_fmt_of_2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2, |
| 4817 | enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr); |
| 4818 | |
| 4819 | attribute_deprecated |
| 4820 | #if AV_HAVE_INCOMPATIBLE_LIBAV_ABI |
| 4821 | enum AVPixelFormat avcodec_find_best_pix_fmt2(const enum AVPixelFormat *pix_fmt_list, |
| 4822 | enum AVPixelFormat src_pix_fmt, |
| 4823 | int has_alpha, int *loss_ptr); |
| 4824 | #else |
| 4825 | enum AVPixelFormat avcodec_find_best_pix_fmt2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2, |
| 4826 | enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr); |
| 4827 | #endif |
| 4828 | |
| 4829 | |
| 4830 | enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum AVPixelFormat * fmt); |
| 4831 | |
| 4832 | /** |
| 4833 | * @} |
| 4834 | */ |
| 4835 | |
| 4836 | #if FF_API_SET_DIMENSIONS |
| 4837 | /** |
| 4838 | * @deprecated this function is not supposed to be used from outside of lavc |
| 4839 | */ |
| 4840 | attribute_deprecated |
| 4841 | void avcodec_set_dimensions(AVCodecContext *s, int width, int height); |
| 4842 | #endif |
| 4843 | |
| 4844 | /** |
| 4845 | * Put a string representing the codec tag codec_tag in buf. |
| 4846 | * |
| 4847 | * @param buf buffer to place codec tag in |
| 4848 | * @param buf_size size in bytes of buf |
| 4849 | * @param codec_tag codec tag to assign |
| 4850 | * @return the length of the string that would have been generated if |
| 4851 | * enough space had been available, excluding the trailing null |
| 4852 | */ |
| 4853 | size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag); |
| 4854 | |
| 4855 | void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode); |
| 4856 | |
| 4857 | /** |
| 4858 | * Return a name for the specified profile, if available. |
| 4859 | * |
| 4860 | * @param codec the codec that is searched for the given profile |
| 4861 | * @param profile the profile value for which a name is requested |
| 4862 | * @return A name for the profile if found, NULL otherwise. |
| 4863 | */ |
| 4864 | const char *av_get_profile_name(const AVCodec *codec, int profile); |
| 4865 | |
| 4866 | int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size); |
| 4867 | int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int, int),void *arg, int *ret, int count); |
| 4868 | //FIXME func typedef |
| 4869 | |
| 4870 | /** |
| 4871 | * Fill AVFrame audio data and linesize pointers. |
| 4872 | * |
| 4873 | * The buffer buf must be a preallocated buffer with a size big enough |
| 4874 | * to contain the specified samples amount. The filled AVFrame data |
| 4875 | * pointers will point to this buffer. |
| 4876 | * |
| 4877 | * AVFrame extended_data channel pointers are allocated if necessary for |
| 4878 | * planar audio. |
| 4879 | * |
| 4880 | * @param frame the AVFrame |
| 4881 | * frame->nb_samples must be set prior to calling the |
| 4882 | * function. This function fills in frame->data, |
| 4883 | * frame->extended_data, frame->linesize[0]. |
| 4884 | * @param nb_channels channel count |
| 4885 | * @param sample_fmt sample format |
| 4886 | * @param buf buffer to use for frame data |
| 4887 | * @param buf_size size of buffer |
| 4888 | * @param align plane size sample alignment (0 = default) |
| 4889 | * @return >=0 on success, negative error code on failure |
| 4890 | * @todo return the size in bytes required to store the samples in |
| 4891 | * case of success, at the next libavutil bump |
| 4892 | */ |
| 4893 | int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels, |
| 4894 | enum AVSampleFormat sample_fmt, const uint8_t *buf, |
| 4895 | int buf_size, int align); |
| 4896 | |
| 4897 | /** |
| 4898 | * Reset the internal decoder state / flush internal buffers. Should be called |
| 4899 | * e.g. when seeking or when switching to a different stream. |
| 4900 | * |
| 4901 | * @note when refcounted frames are not used (i.e. avctx->refcounted_frames is 0), |
| 4902 | * this invalidates the frames previously returned from the decoder. When |
| 4903 | * refcounted frames are used, the decoder just releases any references it might |
| 4904 | * keep internally, but the caller's reference remains valid. |
| 4905 | */ |
| 4906 | void avcodec_flush_buffers(AVCodecContext *avctx); |
| 4907 | |
| 4908 | /** |
| 4909 | * Return codec bits per sample. |
| 4910 | * |
| 4911 | * @param[in] codec_id the codec |
| 4912 | * @return Number of bits per sample or zero if unknown for the given codec. |
| 4913 | */ |
| 4914 | int av_get_bits_per_sample(enum AVCodecID codec_id); |
| 4915 | |
| 4916 | /** |
| 4917 | * Return the PCM codec associated with a sample format. |
| 4918 | * @param be endianness, 0 for little, 1 for big, |
| 4919 | * -1 (or anything else) for native |
| 4920 | * @return AV_CODEC_ID_PCM_* or AV_CODEC_ID_NONE |
| 4921 | */ |
| 4922 | enum AVCodecID av_get_pcm_codec(enum AVSampleFormat fmt, int be); |
| 4923 | |
| 4924 | /** |
| 4925 | * Return codec bits per sample. |
| 4926 | * Only return non-zero if the bits per sample is exactly correct, not an |
| 4927 | * approximation. |
| 4928 | * |
| 4929 | * @param[in] codec_id the codec |
| 4930 | * @return Number of bits per sample or zero if unknown for the given codec. |
| 4931 | */ |
| 4932 | int av_get_exact_bits_per_sample(enum AVCodecID codec_id); |
| 4933 | |
| 4934 | /** |
| 4935 | * Return audio frame duration. |
| 4936 | * |
| 4937 | * @param avctx codec context |
| 4938 | * @param frame_bytes size of the frame, or 0 if unknown |
| 4939 | * @return frame duration, in samples, if known. 0 if not able to |
| 4940 | * determine. |
| 4941 | */ |
| 4942 | int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes); |
| 4943 | |
| 4944 | |
| 4945 | typedef struct AVBitStreamFilterContext { |
| 4946 | void *priv_data; |
| 4947 | struct AVBitStreamFilter *filter; |
| 4948 | AVCodecParserContext *parser; |
| 4949 | struct AVBitStreamFilterContext *next; |
| 4950 | } AVBitStreamFilterContext; |
| 4951 | |
| 4952 | |
| 4953 | typedef struct AVBitStreamFilter { |
| 4954 | const char *name; |
| 4955 | int priv_data_size; |
| 4956 | int (*filter)(AVBitStreamFilterContext *bsfc, |
| 4957 | AVCodecContext *avctx, const char *args, |
| 4958 | uint8_t **poutbuf, int *poutbuf_size, |
| 4959 | const uint8_t *buf, int buf_size, int keyframe); |
| 4960 | void (*close)(AVBitStreamFilterContext *bsfc); |
| 4961 | struct AVBitStreamFilter *next; |
| 4962 | } AVBitStreamFilter; |
| 4963 | |
| 4964 | /** |
| 4965 | * Register a bitstream filter. |
| 4966 | * |
| 4967 | * The filter will be accessible to the application code through |
| 4968 | * av_bitstream_filter_next() or can be directly initialized with |
| 4969 | * av_bitstream_filter_init(). |
| 4970 | * |
| 4971 | * @see avcodec_register_all() |
| 4972 | */ |
| 4973 | void av_register_bitstream_filter(AVBitStreamFilter *bsf); |
| 4974 | |
| 4975 | /** |
| 4976 | * Create and initialize a bitstream filter context given a bitstream |
| 4977 | * filter name. |
| 4978 | * |
| 4979 | * The returned context must be freed with av_bitstream_filter_close(). |
| 4980 | * |
| 4981 | * @param name the name of the bitstream filter |
| 4982 | * @return a bitstream filter context if a matching filter was found |
| 4983 | * and successfully initialized, NULL otherwise |
| 4984 | */ |
| 4985 | AVBitStreamFilterContext *av_bitstream_filter_init(const char *name); |
| 4986 | |
| 4987 | /** |
| 4988 | * Filter bitstream. |
| 4989 | * |
| 4990 | * This function filters the buffer buf with size buf_size, and places the |
| 4991 | * filtered buffer in the buffer pointed to by poutbuf. |
| 4992 | * |
| 4993 | * The output buffer must be freed by the caller. |
| 4994 | * |
| 4995 | * @param bsfc bitstream filter context created by av_bitstream_filter_init() |
| 4996 | * @param avctx AVCodecContext accessed by the filter, may be NULL. |
| 4997 | * If specified, this must point to the encoder context of the |
| 4998 | * output stream the packet is sent to. |
| 4999 | * @param args arguments which specify the filter configuration, may be NULL |
| 5000 | * @param poutbuf pointer which is updated to point to the filtered buffer |
| 5001 | * @param poutbuf_size pointer which is updated to the filtered buffer size in bytes |
| 5002 | * @param buf buffer containing the data to filter |
| 5003 | * @param buf_size size in bytes of buf |
| 5004 | * @param keyframe set to non-zero if the buffer to filter corresponds to a key-frame packet data |
| 5005 | * @return >= 0 in case of success, or a negative error code in case of failure |
| 5006 | * |
| 5007 | * If the return value is positive, an output buffer is allocated and |
| 5008 | * is available in *poutbuf, and is distinct from the input buffer. |
| 5009 | * |
| 5010 | * If the return value is 0, the output buffer is not allocated and |
| 5011 | * should be considered identical to the input buffer, or in case |
| 5012 | * *poutbuf was set it points to the input buffer (not necessarily to |
| 5013 | * its starting address). |
| 5014 | */ |
| 5015 | int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc, |
| 5016 | AVCodecContext *avctx, const char *args, |
| 5017 | uint8_t **poutbuf, int *poutbuf_size, |
| 5018 | const uint8_t *buf, int buf_size, int keyframe); |
| 5019 | |
| 5020 | /** |
| 5021 | * Release bitstream filter context. |
| 5022 | * |
| 5023 | * @param bsf the bitstream filter context created with |
| 5024 | * av_bitstream_filter_init(), can be NULL |
| 5025 | */ |
| 5026 | void av_bitstream_filter_close(AVBitStreamFilterContext *bsf); |
| 5027 | |
| 5028 | /** |
| 5029 | * If f is NULL, return the first registered bitstream filter, |
| 5030 | * if f is non-NULL, return the next registered bitstream filter |
| 5031 | * after f, or NULL if f is the last one. |
| 5032 | * |
| 5033 | * This function can be used to iterate over all registered bitstream |
| 5034 | * filters. |
| 5035 | */ |
| 5036 | AVBitStreamFilter *av_bitstream_filter_next(const AVBitStreamFilter *f); |
| 5037 | |
| 5038 | /* memory */ |
| 5039 | |
| 5040 | /** |
| 5041 | * Same behaviour av_fast_malloc but the buffer has additional |
| 5042 | * FF_INPUT_BUFFER_PADDING_SIZE at the end which will always be 0. |
| 5043 | * |
| 5044 | * In addition the whole buffer will initially and after resizes |
| 5045 | * be 0-initialized so that no uninitialized data will ever appear. |
| 5046 | */ |
| 5047 | void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size); |
| 5048 | |
| 5049 | /** |
| 5050 | * Same behaviour av_fast_padded_malloc except that buffer will always |
| 5051 | * be 0-initialized after call. |
| 5052 | */ |
| 5053 | void av_fast_padded_mallocz(void *ptr, unsigned int *size, size_t min_size); |
| 5054 | |
| 5055 | /** |
| 5056 | * Encode extradata length to a buffer. Used by xiph codecs. |
| 5057 | * |
| 5058 | * @param s buffer to write to; must be at least (v/255+1) bytes long |
| 5059 | * @param v size of extradata in bytes |
| 5060 | * @return number of bytes written to the buffer. |
| 5061 | */ |
| 5062 | unsigned int av_xiphlacing(unsigned char *s, unsigned int v); |
| 5063 | |
| 5064 | #if FF_API_MISSING_SAMPLE |
| 5065 | /** |
| 5066 | * Log a generic warning message about a missing feature. This function is |
| 5067 | * intended to be used internally by FFmpeg (libavcodec, libavformat, etc.) |
| 5068 | * only, and would normally not be used by applications. |
| 5069 | * @param[in] avc a pointer to an arbitrary struct of which the first field is |
| 5070 | * a pointer to an AVClass struct |
| 5071 | * @param[in] feature string containing the name of the missing feature |
| 5072 | * @param[in] want_sample indicates if samples are wanted which exhibit this feature. |
| 5073 | * If want_sample is non-zero, additional verbage will be added to the log |
| 5074 | * message which tells the user how to report samples to the development |
| 5075 | * mailing list. |
| 5076 | * @deprecated Use avpriv_report_missing_feature() instead. |
| 5077 | */ |
| 5078 | attribute_deprecated |
| 5079 | void av_log_missing_feature(void *avc, const char *feature, int want_sample); |
| 5080 | |
| 5081 | /** |
| 5082 | * Log a generic warning message asking for a sample. This function is |
| 5083 | * intended to be used internally by FFmpeg (libavcodec, libavformat, etc.) |
| 5084 | * only, and would normally not be used by applications. |
| 5085 | * @param[in] avc a pointer to an arbitrary struct of which the first field is |
| 5086 | * a pointer to an AVClass struct |
| 5087 | * @param[in] msg string containing an optional message, or NULL if no message |
| 5088 | * @deprecated Use avpriv_request_sample() instead. |
| 5089 | */ |
| 5090 | attribute_deprecated |
| 5091 | void av_log_ask_for_sample(void *avc, const char *msg, ...) av_printf_format(2, 3); |
| 5092 | #endif /* FF_API_MISSING_SAMPLE */ |
| 5093 | |
| 5094 | /** |
| 5095 | * Register the hardware accelerator hwaccel. |
| 5096 | */ |
| 5097 | void av_register_hwaccel(AVHWAccel *hwaccel); |
| 5098 | |
| 5099 | /** |
| 5100 | * If hwaccel is NULL, returns the first registered hardware accelerator, |
| 5101 | * if hwaccel is non-NULL, returns the next registered hardware accelerator |
| 5102 | * after hwaccel, or NULL if hwaccel is the last one. |
| 5103 | */ |
| 5104 | AVHWAccel *av_hwaccel_next(const AVHWAccel *hwaccel); |
| 5105 | |
| 5106 | |
| 5107 | /** |
| 5108 | * Lock operation used by lockmgr |
| 5109 | */ |
| 5110 | enum AVLockOp { |
| 5111 | AV_LOCK_CREATE, ///< Create a mutex |
| 5112 | AV_LOCK_OBTAIN, ///< Lock the mutex |
| 5113 | AV_LOCK_RELEASE, ///< Unlock the mutex |
| 5114 | AV_LOCK_DESTROY, ///< Free mutex resources |
| 5115 | }; |
| 5116 | |
| 5117 | /** |
| 5118 | * Register a user provided lock manager supporting the operations |
| 5119 | * specified by AVLockOp. mutex points to a (void *) where the |
| 5120 | * lockmgr should store/get a pointer to a user allocated mutex. It's |
| 5121 | * NULL upon AV_LOCK_CREATE and != NULL for all other ops. |
| 5122 | * |
| 5123 | * @param cb User defined callback. Note: FFmpeg may invoke calls to this |
| 5124 | * callback during the call to av_lockmgr_register(). |
| 5125 | * Thus, the application must be prepared to handle that. |
| 5126 | * If cb is set to NULL the lockmgr will be unregistered. |
| 5127 | * Also note that during unregistration the previously registered |
| 5128 | * lockmgr callback may also be invoked. |
| 5129 | */ |
| 5130 | int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op)); |
| 5131 | |
| 5132 | /** |
| 5133 | * Get the type of the given codec. |
| 5134 | */ |
| 5135 | enum AVMediaType avcodec_get_type(enum AVCodecID codec_id); |
| 5136 | |
| 5137 | /** |
| 5138 | * Get the name of a codec. |
| 5139 | * @return a static string identifying the codec; never NULL |
| 5140 | */ |
| 5141 | const char *avcodec_get_name(enum AVCodecID id); |
| 5142 | |
| 5143 | /** |
| 5144 | * @return a positive value if s is open (i.e. avcodec_open2() was called on it |
| 5145 | * with no corresponding avcodec_close()), 0 otherwise. |
| 5146 | */ |
| 5147 | int avcodec_is_open(AVCodecContext *s); |
| 5148 | |
| 5149 | /** |
| 5150 | * @return a non-zero number if codec is an encoder, zero otherwise |
| 5151 | */ |
| 5152 | int av_codec_is_encoder(const AVCodec *codec); |
| 5153 | |
| 5154 | /** |
| 5155 | * @return a non-zero number if codec is a decoder, zero otherwise |
| 5156 | */ |
| 5157 | int av_codec_is_decoder(const AVCodec *codec); |
| 5158 | |
| 5159 | /** |
| 5160 | * @return descriptor for given codec ID or NULL if no descriptor exists. |
| 5161 | */ |
| 5162 | const AVCodecDescriptor *avcodec_descriptor_get(enum AVCodecID id); |
| 5163 | |
| 5164 | /** |
| 5165 | * Iterate over all codec descriptors known to libavcodec. |
| 5166 | * |
| 5167 | * @param prev previous descriptor. NULL to get the first descriptor. |
| 5168 | * |
| 5169 | * @return next descriptor or NULL after the last descriptor |
| 5170 | */ |
| 5171 | const AVCodecDescriptor *avcodec_descriptor_next(const AVCodecDescriptor *prev); |
| 5172 | |
| 5173 | /** |
| 5174 | * @return codec descriptor with the given name or NULL if no such descriptor |
| 5175 | * exists. |
| 5176 | */ |
| 5177 | const AVCodecDescriptor *avcodec_descriptor_get_by_name(const char *name); |
| 5178 | |
| 5179 | /** |
| 5180 | * @} |
| 5181 | */ |
| 5182 | |
| 5183 | #endif /* AVCODEC_AVCODEC_H */ |