zerocodec: check if the previous frame is missing
[libav.git] / libavcodec / avcodec.h
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1/*
2 * copyright (c) 2001 Fabrice Bellard
3 *
2912e87a 4 * This file is part of Libav.
b78e7197 5 *
2912e87a 6 * Libav is free software; you can redistribute it and/or
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7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
b78e7197 9 * version 2.1 of the License, or (at your option) any later version.
04d7f601 10 *
2912e87a 11 * Libav is distributed in the hope that it will be useful,
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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
2912e87a 17 * License along with Libav; if not, write to the Free Software
e5a389a1 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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19 */
20
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21#ifndef AVCODEC_AVCODEC_H
22#define AVCODEC_AVCODEC_H
a96b68b7 23
36df8805 24/**
ba87f080 25 * @file
f5bccd85 26 * external API header
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27 */
28
c60208e7 29#include <errno.h>
737eb597 30#include "libavutil/samplefmt.h"
76a448ed 31#include "libavutil/avutil.h"
7160bb71 32#include "libavutil/cpu.h"
0b950fe2 33#include "libavutil/dict.h"
abc78a5a 34#include "libavutil/log.h"
d49ea4af 35#include "libavutil/pixfmt.h"
e91709ca 36#include "libavutil/rational.h"
de6d9b64 37
3dd851c4 38#include "libavcodec/version.h"
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39/**
40 * @defgroup libavc Encoding/Decoding Library
41 * @{
42 *
43 * @defgroup lavc_decoding Decoding
44 * @{
45 * @}
46 *
47 * @defgroup lavc_encoding Encoding
48 * @{
49 * @}
50 *
51 * @defgroup lavc_codec Codecs
52 * @{
53 * @defgroup lavc_codec_native Native Codecs
54 * @{
55 * @}
56 * @defgroup lavc_codec_wrappers External library wrappers
57 * @{
58 * @}
59 * @defgroup lavc_codec_hwaccel Hardware Accelerators bridge
60 * @{
61 * @}
62 * @}
63 * @defgroup lavc_internal Internal
64 * @{
65 * @}
66 * @}
67 *
68 */
69
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70/**
71 * @defgroup lavc_core Core functions/structures.
72 * @ingroup libavc
73 *
74 * Basic definitions, functions for querying libavcodec capabilities,
75 * allocating core structures, etc.
76 * @{
77 */
eda7c983 78
7ebf5927 79/**
48966b02 80 * Identify the syntax and semantics of the bitstream.
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81 * The principle is roughly:
82 * Two decoders with the same ID can decode the same streams.
83 * Two encoders with the same ID can encode compatible streams.
84 * There may be slight deviations from the principle due to implementation
85 * details.
7ebf5927 86 *
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87 * If you add a codec ID to this list, add it so that
88 * 1. no value of a existing codec ID changes (that would break ABI),
89 * 2. it is as close as possible to similar codecs.
7ebf5927 90 */
de6d9b64 91enum CodecID {
115329f1 92 CODEC_ID_NONE,
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93
94 /* video codecs */
de6d9b64 95 CODEC_ID_MPEG1VIDEO,
0e373b95 96 CODEC_ID_MPEG2VIDEO, ///< preferred ID for MPEG-1/2 video decoding
fb364ada 97 CODEC_ID_MPEG2VIDEO_XVMC,
c6148de2 98 CODEC_ID_H261,
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99 CODEC_ID_H263,
100 CODEC_ID_RV10,
68b94c35 101 CODEC_ID_RV20,
de6d9b64 102 CODEC_ID_MJPEG,
b135d9fb 103 CODEC_ID_MJPEGB,
b1e6b355 104 CODEC_ID_LJPEG,
5e83dec4 105 CODEC_ID_SP5X,
5639729b 106 CODEC_ID_JPEGLS,
bf89e6b1 107 CODEC_ID_MPEG4,
de6d9b64 108 CODEC_ID_RAWVIDEO,
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109 CODEC_ID_MSMPEG4V1,
110 CODEC_ID_MSMPEG4V2,
111 CODEC_ID_MSMPEG4V3,
e1a9dbff 112 CODEC_ID_WMV1,
b50eef3a 113 CODEC_ID_WMV2,
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114 CODEC_ID_H263P,
115 CODEC_ID_H263I,
d4f5d74a 116 CODEC_ID_FLV1,
be8ffec9 117 CODEC_ID_SVQ1,
8b82a956 118 CODEC_ID_SVQ3,
020fcc94 119 CODEC_ID_DVVIDEO,
11f18faf 120 CODEC_ID_HUFFYUV,
f70f7c6d 121 CODEC_ID_CYUV,
0da71265 122 CODEC_ID_H264,
deabd4fd 123 CODEC_ID_INDEO3,
d86053a4 124 CODEC_ID_VP3,
f44ee2c3 125 CODEC_ID_THEORA,
3d2e8cce 126 CODEC_ID_ASV1,
9b56edf5 127 CODEC_ID_ASV2,
5e20f836 128 CODEC_ID_FFV1,
e2a7bb28 129 CODEC_ID_4XM,
be3564ed 130 CODEC_ID_VCR1,
3aff069b 131 CODEC_ID_CLJR,
c3bf0288 132 CODEC_ID_MDEC,
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133 CODEC_ID_ROQ,
134 CODEC_ID_INTERPLAY_VIDEO,
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135 CODEC_ID_XAN_WC3,
136 CODEC_ID_XAN_WC4,
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137 CODEC_ID_RPZA,
138 CODEC_ID_CINEPAK,
139 CODEC_ID_WS_VQA,
140 CODEC_ID_MSRLE,
141 CODEC_ID_MSVIDEO1,
4120a53a 142 CODEC_ID_IDCIN,
1dc1ed99 143 CODEC_ID_8BPS,
11e29a41 144 CODEC_ID_SMC,
42cad81a 145 CODEC_ID_FLIC,
9a4117d5 146 CODEC_ID_TRUEMOTION1,
fafa0b75 147 CODEC_ID_VMDVIDEO,
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148 CODEC_ID_MSZH,
149 CODEC_ID_ZLIB,
070ed1bc 150 CODEC_ID_QTRLE,
791e7b83 151 CODEC_ID_SNOW,
9d53d58e 152 CODEC_ID_TSCC,
d0a0bbd2 153 CODEC_ID_ULTI,
d08d7142 154 CODEC_ID_QDRAW,
ab711b3c 155 CODEC_ID_VIXL,
acfd8f0f 156 CODEC_ID_QPEG,
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157 CODEC_ID_PNG,
158 CODEC_ID_PPM,
159 CODEC_ID_PBM,
160 CODEC_ID_PGM,
161 CODEC_ID_PGMYUV,
162 CODEC_ID_PAM,
f37b9768 163 CODEC_ID_FFVHUFF,
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164 CODEC_ID_RV30,
165 CODEC_ID_RV40,
10b9c374 166 CODEC_ID_VC1,
21aa398f 167 CODEC_ID_WMV3,
9c7fb608 168 CODEC_ID_LOCO,
a8a15e9d 169 CODEC_ID_WNV1,
589f8220 170 CODEC_ID_AASC,
856dbbff 171 CODEC_ID_INDEO2,
b81f8949 172 CODEC_ID_FRAPS,
64af6168 173 CODEC_ID_TRUEMOTION2,
9fa62f2a 174 CODEC_ID_BMP,
e0f80bd7 175 CODEC_ID_CSCD,
4e114829 176 CODEC_ID_MMVIDEO,
9c8d8e84 177 CODEC_ID_ZMBV,
26376701 178 CODEC_ID_AVS,
348efc18 179 CODEC_ID_SMACKVIDEO,
dfca23e3 180 CODEC_ID_NUV,
fd7b1991 181 CODEC_ID_KMVC,
0919e788 182 CODEC_ID_FLASHSV,
20ffddb9 183 CODEC_ID_CAVS,
f31065f6 184 CODEC_ID_JPEG2000,
eb57c889 185 CODEC_ID_VMNC,
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186 CODEC_ID_VP5,
187 CODEC_ID_VP6,
188 CODEC_ID_VP6F,
3689cf16 189 CODEC_ID_TARGA,
72450e50 190 CODEC_ID_DSICINVIDEO,
29f86228 191 CODEC_ID_TIERTEXSEQVIDEO,
a991b1fe 192 CODEC_ID_TIFF,
06d392a7 193 CODEC_ID_GIF,
33a0dd37 194 CODEC_ID_DXA,
52b6bad2 195 CODEC_ID_DNXHD,
efb0c399 196 CODEC_ID_THP,
2d99eed1 197 CODEC_ID_SGI,
9a0ddd09 198 CODEC_ID_C93,
1e6c6759 199 CODEC_ID_BETHSOFTVID,
b46d68c6 200 CODEC_ID_PTX,
1ca779e7 201 CODEC_ID_TXD,
91fc2cf1 202 CODEC_ID_VP6A,
8787d837 203 CODEC_ID_AMV,
66f7679c 204 CODEC_ID_VB,
b4abe1d1 205 CODEC_ID_PCX,
d43df959 206 CODEC_ID_SUNRAST,
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207 CODEC_ID_INDEO4,
208 CODEC_ID_INDEO5,
a7129de5 209 CODEC_ID_MIMIC,
975cdc8f 210 CODEC_ID_RL2,
40d26273 211 CODEC_ID_ESCAPE124,
782a58ec 212 CODEC_ID_DIRAC,
b64c096b 213 CODEC_ID_BFI,
495900f7 214 CODEC_ID_CMV,
974e0eee 215 CODEC_ID_MOTIONPIXELS,
cfc78718 216 CODEC_ID_TGV,
42b30357 217 CODEC_ID_TGQ,
d8964f3a 218 CODEC_ID_TQI,
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219 CODEC_ID_AURA,
220 CODEC_ID_AURA2,
97f92143 221 CODEC_ID_V210X,
a1fd2bc3 222 CODEC_ID_TMV,
ca0bb1c4 223 CODEC_ID_V210,
94d3d6a4 224 CODEC_ID_DPX,
c63ea92b 225 CODEC_ID_MAD,
d8b35b85 226 CODEC_ID_FRWU,
0aa6a518 227 CODEC_ID_FLASHSV2,
a3d995c1 228 CODEC_ID_CDGRAPHICS,
4aaab0a3 229 CODEC_ID_R210,
a1ae40fd 230 CODEC_ID_ANM,
4e5f42dd 231 CODEC_ID_BINKVIDEO,
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232 CODEC_ID_IFF_ILBM,
233 CODEC_ID_IFF_BYTERUN1,
bf354122 234 CODEC_ID_KGV1,
148bcae9 235 CODEC_ID_YOP,
a98c2dfa 236 CODEC_ID_VP8,
a526d619 237 CODEC_ID_PICTOR,
beaa963c 238 CODEC_ID_ANSI,
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239 CODEC_ID_A64_MULTI,
240 CODEC_ID_A64_MULTI5,
43836928 241 CODEC_ID_R10K,
9d09ebf1 242 CODEC_ID_MXPEG,
d267b339 243 CODEC_ID_LAGARITH,
f5b82f45 244 CODEC_ID_PRORES,
0697440c 245 CODEC_ID_JV,
42315dab 246 CODEC_ID_DFA,
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247 CODEC_ID_WMV3IMAGE,
248 CODEC_ID_VC1IMAGE,
0d8506b8 249 CODEC_ID_UTVIDEO,
f545e006 250 CODEC_ID_BMV_VIDEO,
c433a3f9 251 CODEC_ID_VBLE,
19341c58 252 CODEC_ID_DXTORY,
80f6c0bb 253 CODEC_ID_V410,
27ed027b 254 CODEC_ID_XWD,
dc4e5748 255 CODEC_ID_CDXL,
0afd8f12 256 CODEC_ID_XBM,
0e714f88 257 CODEC_ID_ZEROCODEC,
40c5ee99 258
f5bccd85 259 /* various PCM "codecs" */
bca06e77 260 CODEC_ID_FIRST_AUDIO = 0x10000, ///< A dummy id pointing at the start of audio codecs
66760b30 261 CODEC_ID_PCM_S16LE = 0x10000,
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262 CODEC_ID_PCM_S16BE,
263 CODEC_ID_PCM_U16LE,
264 CODEC_ID_PCM_U16BE,
265 CODEC_ID_PCM_S8,
266 CODEC_ID_PCM_U8,
267 CODEC_ID_PCM_MULAW,
268 CODEC_ID_PCM_ALAW,
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269 CODEC_ID_PCM_S32LE,
270 CODEC_ID_PCM_S32BE,
271 CODEC_ID_PCM_U32LE,
272 CODEC_ID_PCM_U32BE,
273 CODEC_ID_PCM_S24LE,
274 CODEC_ID_PCM_S24BE,
275 CODEC_ID_PCM_U24LE,
276 CODEC_ID_PCM_U24BE,
277 CODEC_ID_PCM_S24DAUD,
a11c2a2c 278 CODEC_ID_PCM_ZORK,
725d86bf 279 CODEC_ID_PCM_S16LE_PLANAR,
1472b7dd 280 CODEC_ID_PCM_DVD,
aa29709e 281 CODEC_ID_PCM_F32BE,
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282 CODEC_ID_PCM_F32LE,
283 CODEC_ID_PCM_F64BE,
284 CODEC_ID_PCM_F64LE,
5dd3707b 285 CODEC_ID_PCM_BLURAY,
fbeabfca 286 CODEC_ID_PCM_LXF,
9aa91043 287 CODEC_ID_S302M,
f1f6d361 288 CODEC_ID_PCM_S8_PLANAR,
0147f198 289
f5bccd85 290 /* various ADPCM codecs */
66760b30 291 CODEC_ID_ADPCM_IMA_QT = 0x11000,
0147f198 292 CODEC_ID_ADPCM_IMA_WAV,
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293 CODEC_ID_ADPCM_IMA_DK3,
294 CODEC_ID_ADPCM_IMA_DK4,
2fdf638b 295 CODEC_ID_ADPCM_IMA_WS,
7d8379f2 296 CODEC_ID_ADPCM_IMA_SMJPEG,
0147f198 297 CODEC_ID_ADPCM_MS,
e2a7bb28 298 CODEC_ID_ADPCM_4XM,
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299 CODEC_ID_ADPCM_XA,
300 CODEC_ID_ADPCM_ADX,
7d8379f2 301 CODEC_ID_ADPCM_EA,
e5966052 302 CODEC_ID_ADPCM_G726,
b3bfb299 303 CODEC_ID_ADPCM_CT,
659c3692 304 CODEC_ID_ADPCM_SWF,
2ff4524e 305 CODEC_ID_ADPCM_YAMAHA,
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306 CODEC_ID_ADPCM_SBPRO_4,
307 CODEC_ID_ADPCM_SBPRO_3,
308 CODEC_ID_ADPCM_SBPRO_2,
d1e0d21f 309 CODEC_ID_ADPCM_THP,
3a7f5d07 310 CODEC_ID_ADPCM_IMA_AMV,
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311 CODEC_ID_ADPCM_EA_R1,
312 CODEC_ID_ADPCM_EA_R3,
313 CODEC_ID_ADPCM_EA_R2,
7bb65d89 314 CODEC_ID_ADPCM_IMA_EA_SEAD,
fac84d3c 315 CODEC_ID_ADPCM_IMA_EA_EACS,
271b4095 316 CODEC_ID_ADPCM_EA_XAS,
861c63a2 317 CODEC_ID_ADPCM_EA_MAXIS_XA,
055dc116 318 CODEC_ID_ADPCM_IMA_ISS,
58e37eaf 319 CODEC_ID_ADPCM_G722,
220506d2 320 CODEC_ID_ADPCM_IMA_APC,
891f64b3 321
17179d2d 322 /* AMR */
66760b30 323 CODEC_ID_AMR_NB = 0x12000,
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324 CODEC_ID_AMR_WB,
325
b8414bbd 326 /* RealAudio codecs*/
66760b30 327 CODEC_ID_RA_144 = 0x13000,
b8414bbd 328 CODEC_ID_RA_288,
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329
330 /* various DPCM codecs */
66760b30 331 CODEC_ID_ROQ_DPCM = 0x14000,
3ef8be2b 332 CODEC_ID_INTERPLAY_DPCM,
9937e686 333 CODEC_ID_XAN_DPCM,
d08d7142 334 CODEC_ID_SOL_DPCM,
115329f1 335
ba0dabbf 336 /* audio codecs */
66760b30 337 CODEC_ID_MP2 = 0x15000,
0e373b95 338 CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3
17179d2d 339 CODEC_ID_AAC,
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340 CODEC_ID_AC3,
341 CODEC_ID_DTS,
342 CODEC_ID_VORBIS,
343 CODEC_ID_DVAUDIO,
344 CODEC_ID_WMAV1,
345 CODEC_ID_WMAV2,
346 CODEC_ID_MACE3,
347 CODEC_ID_MACE6,
348 CODEC_ID_VMDAUDIO,
ac2570a8 349 CODEC_ID_FLAC,
1ede228a 350 CODEC_ID_MP3ADU,
d2a7718d 351 CODEC_ID_MP3ON4,
85ad5695 352 CODEC_ID_SHORTEN,
5df8a0c6 353 CODEC_ID_ALAC,
034eeaa1 354 CODEC_ID_WESTWOOD_SND1,
0e373b95 355 CODEC_ID_GSM, ///< as in Berlin toast format
d9b1c197 356 CODEC_ID_QDM2,
e0f7e329 357 CODEC_ID_COOK,
bf3027c8 358 CODEC_ID_TRUESPEECH,
a24c4a2a 359 CODEC_ID_TTA,
348efc18 360 CODEC_ID_SMACKAUDIO,
6c496518 361 CODEC_ID_QCELP,
730581f3 362 CODEC_ID_WAVPACK,
72450e50 363 CODEC_ID_DSICINAUDIO,
84ed36da 364 CODEC_ID_IMC,
185c7b6b 365 CODEC_ID_MUSEPACK7,
aad512b4 366 CODEC_ID_MLP,
f5bccd85 367 CODEC_ID_GSM_MS, /* as found in WAV */
10e26bc7 368 CODEC_ID_ATRAC3,
8950f828 369 CODEC_ID_VOXWARE,
bf4a1f17 370 CODEC_ID_APE,
636b13c5 371 CODEC_ID_NELLYMOSER,
12877faf 372 CODEC_ID_MUSEPACK8,
cb4ddf77 373 CODEC_ID_SPEEX,
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374 CODEC_ID_WMAVOICE,
375 CODEC_ID_WMAPRO,
800b9c24 376 CODEC_ID_WMALOSSLESS,
b339f0c6 377 CODEC_ID_ATRAC3P,
2988c93d 378 CODEC_ID_EAC3,
faeedbbb 379 CODEC_ID_SIPR,
7f507b2d 380 CODEC_ID_MP1,
616e899c 381 CODEC_ID_TWINVQ,
9ba4821d 382 CODEC_ID_TRUEHD,
b24bbbb4 383 CODEC_ID_MP4ALS,
223e8df1 384 CODEC_ID_ATRAC1,
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385 CODEC_ID_BINKAUDIO_RDFT,
386 CODEC_ID_BINKAUDIO_DCT,
136e19e1 387 CODEC_ID_AAC_LATM,
ed19fafd 388 CODEC_ID_QDMC,
4ca59d19 389 CODEC_ID_CELT,
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390 CODEC_ID_G723_1,
391 CODEC_ID_G729,
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392 CODEC_ID_8SVX_EXP,
393 CODEC_ID_8SVX_FIB,
f545e006 394 CODEC_ID_BMV_AUDIO,
b8560637 395 CODEC_ID_RALF,
115329f1 396
240c1657 397 /* subtitle codecs */
bca06e77 398 CODEC_ID_FIRST_SUBTITLE = 0x17000, ///< A dummy ID pointing at the start of subtitle codecs.
66760b30 399 CODEC_ID_DVD_SUBTITLE = 0x17000,
115329f1 400 CODEC_ID_DVB_SUBTITLE,
0e373b95 401 CODEC_ID_TEXT, ///< raw UTF-8 text
7e2643ae 402 CODEC_ID_XSUB,
f9a9b350 403 CODEC_ID_SSA,
cc8c2c6a 404 CODEC_ID_MOV_TEXT,
c58b82a2 405 CODEC_ID_HDMV_PGS_SUBTITLE,
e58992e4 406 CODEC_ID_DVB_TELETEXT,
ba2c508d 407 CODEC_ID_SRT,
115329f1 408
7ce68923 409 /* other specific kind of codecs (generally used for attachments) */
bca06e77 410 CODEC_ID_FIRST_UNKNOWN = 0x18000, ///< A dummy ID pointing at the start of various fake codecs.
66760b30 411 CODEC_ID_TTF = 0x18000,
f8d7c9d3 412
66760b30 413 CODEC_ID_PROBE = 0x19000, ///< codec_id is not known (like CODEC_ID_NONE) but lavf should attempt to identify it
0bef08e5 414
66760b30 415 CODEC_ID_MPEG2TS = 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS
f5bccd85 416 * stream (only used by libavformat) */
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417 CODEC_ID_MPEG4SYSTEMS = 0x20001, /**< _FAKE_ codec to indicate a MPEG-4 Systems
418 * stream (only used by libavformat) */
66760b30 419 CODEC_ID_FFMETADATA = 0x21000, ///< Dummy codec for streams containing only metadata information.
de6d9b64 420};
dcedf586 421
0eea2129 422#if FF_API_OLD_DECODE_AUDIO
de6d9b64 423/* in bytes */
8170e5fb 424#define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
0eea2129 425#endif
de6d9b64 426
d7425f59 427/**
c8ef8464 428 * @ingroup lavc_decoding
cf713bb8 429 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
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430 * This is mainly needed because some optimized bitstream readers read
431 * 32 or 64 bit at once and could read over the end.<br>
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432 * Note: If the first 23 bits of the additional bytes are not 0, then damaged
433 * MPEG bitstreams could cause overread and segfault.
d7425f59 434 */
171b7b91 435#define FF_INPUT_BUFFER_PADDING_SIZE 8
d7425f59 436
0ecca7a4 437/**
f038515f 438 * @ingroup lavc_encoding
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439 * minimum encoding buffer size
440 * Used to avoid some checks during header writing.
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441 */
442#define FF_MIN_BUFFER_SIZE 16384
443
47146dfb 444
0e373b95 445/**
f038515f 446 * @ingroup lavc_encoding
bafc102b 447 * motion estimation type.
0e373b95 448 */
e4986da9 449enum Motion_Est_ID {
9b4dd1b8 450 ME_ZERO = 1, ///< no search, that is use 0,0 vector whenever one is needed
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451 ME_FULL,
452 ME_LOG,
453 ME_PHODS,
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454 ME_EPZS, ///< enhanced predictive zonal search
455 ME_X1, ///< reserved for experiments
456 ME_HEX, ///< hexagon based search
457 ME_UMH, ///< uneven multi-hexagon search
458 ME_ITER, ///< iterative search
359bbdab 459 ME_TESA, ///< transformed exhaustive search algorithm
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460};
461
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462/**
463 * @ingroup lavc_decoding
464 */
8c3eba7c 465enum AVDiscard{
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466 /* We leave some space between them for extensions (drop some
467 * keyframes for intra-only or drop just some bidir frames). */
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468 AVDISCARD_NONE =-16, ///< discard nothing
469 AVDISCARD_DEFAULT = 0, ///< discard useless packets like 0 size packets in avi
470 AVDISCARD_NONREF = 8, ///< discard all non reference
471 AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
472 AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
473 AVDISCARD_ALL = 48, ///< discard all
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474};
475
4ee6a5c1 476enum AVColorPrimaries{
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477 AVCOL_PRI_BT709 = 1, ///< also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP177 Annex B
478 AVCOL_PRI_UNSPECIFIED = 2,
479 AVCOL_PRI_BT470M = 4,
480 AVCOL_PRI_BT470BG = 5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM
481 AVCOL_PRI_SMPTE170M = 6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC
482 AVCOL_PRI_SMPTE240M = 7, ///< functionally identical to above
483 AVCOL_PRI_FILM = 8,
484 AVCOL_PRI_NB , ///< Not part of ABI
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485};
486
487enum AVColorTransferCharacteristic{
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488 AVCOL_TRC_BT709 = 1, ///< also ITU-R BT1361
489 AVCOL_TRC_UNSPECIFIED = 2,
490 AVCOL_TRC_GAMMA22 = 4, ///< also ITU-R BT470M / ITU-R BT1700 625 PAL & SECAM
491 AVCOL_TRC_GAMMA28 = 5, ///< also ITU-R BT470BG
ca93f0fa 492 AVCOL_TRC_SMPTE240M = 7,
ccc2dfbc 493 AVCOL_TRC_NB , ///< Not part of ABI
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494};
495
496enum AVColorSpace{
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497 AVCOL_SPC_RGB = 0,
498 AVCOL_SPC_BT709 = 1, ///< also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
499 AVCOL_SPC_UNSPECIFIED = 2,
500 AVCOL_SPC_FCC = 4,
501 AVCOL_SPC_BT470BG = 5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM / IEC 61966-2-4 xvYCC601
502 AVCOL_SPC_SMPTE170M = 6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC / functionally identical to above
503 AVCOL_SPC_SMPTE240M = 7,
85395ba7 504 AVCOL_SPC_YCOCG = 8, ///< Used by Dirac / VC-2 and H.264 FRext, see ITU-T SG16
ccc2dfbc 505 AVCOL_SPC_NB , ///< Not part of ABI
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506};
507
508enum AVColorRange{
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509 AVCOL_RANGE_UNSPECIFIED = 0,
510 AVCOL_RANGE_MPEG = 1, ///< the normal 219*2^(n-8) "MPEG" YUV ranges
511 AVCOL_RANGE_JPEG = 2, ///< the normal 2^n-1 "JPEG" YUV ranges
512 AVCOL_RANGE_NB , ///< Not part of ABI
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513};
514
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515/**
516 * X X 3 4 X X are luma samples,
517 * 1 2 1-6 are possible chroma positions
518 * X X 5 6 X 0 is undefined/unknown position
519 */
520enum AVChromaLocation{
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521 AVCHROMA_LOC_UNSPECIFIED = 0,
522 AVCHROMA_LOC_LEFT = 1, ///< mpeg2/4, h264 default
523 AVCHROMA_LOC_CENTER = 2, ///< mpeg1, jpeg, h263
524 AVCHROMA_LOC_TOPLEFT = 3, ///< DV
525 AVCHROMA_LOC_TOP = 4,
526 AVCHROMA_LOC_BOTTOMLEFT = 5,
527 AVCHROMA_LOC_BOTTOM = 6,
528 AVCHROMA_LOC_NB , ///< Not part of ABI
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529};
530
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531enum AVAudioServiceType {
532 AV_AUDIO_SERVICE_TYPE_MAIN = 0,
533 AV_AUDIO_SERVICE_TYPE_EFFECTS = 1,
534 AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED = 2,
535 AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED = 3,
536 AV_AUDIO_SERVICE_TYPE_DIALOGUE = 4,
537 AV_AUDIO_SERVICE_TYPE_COMMENTARY = 5,
538 AV_AUDIO_SERVICE_TYPE_EMERGENCY = 6,
539 AV_AUDIO_SERVICE_TYPE_VOICE_OVER = 7,
540 AV_AUDIO_SERVICE_TYPE_KARAOKE = 8,
541 AV_AUDIO_SERVICE_TYPE_NB , ///< Not part of ABI
542};
543
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544/**
545 * @ingroup lavc_encoding
546 */
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547typedef struct RcOverride{
548 int start_frame;
549 int end_frame;
f5bccd85 550 int qscale; // If this is 0 then quality_factor will be used instead.
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551 float quality_factor;
552} RcOverride;
553
b0ec9efd 554#define FF_MAX_B_FRAMES 16
9dbcbd92 555
a949d72e 556/* encoding support
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557 These flags can be passed in AVCodecContext.flags before initialization.
558 Note: Not everything is supported yet.
a949d72e 559*/
de6d9b64 560
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561#define CODEC_FLAG_QSCALE 0x0002 ///< Use fixed qscale.
562#define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / advanced prediction for H.263.
563#define CODEC_FLAG_QPEL 0x0010 ///< Use qpel MC.
564#define CODEC_FLAG_GMC 0x0020 ///< Use GMC.
565#define CODEC_FLAG_MV0 0x0040 ///< Always try a MB with MV=<0,0>.
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566/**
567 * The parent program guarantees that the input for B-frames containing
f5bccd85 568 * streams is not written to for at least s->max_b_frames+1 frames, if
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569 * this is not set the input will be copied.
570 */
8b4c7dbc 571#define CODEC_FLAG_INPUT_PRESERVED 0x0100
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572#define CODEC_FLAG_PASS1 0x0200 ///< Use internal 2pass ratecontrol in first pass mode.
573#define CODEC_FLAG_PASS2 0x0400 ///< Use internal 2pass ratecontrol in second pass mode.
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574#define CODEC_FLAG_GRAY 0x2000 ///< Only decode/encode grayscale.
575#define CODEC_FLAG_EMU_EDGE 0x4000 ///< Don't draw edges.
576#define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding.
577#define CODEC_FLAG_TRUNCATED 0x00010000 /** Input bitstream might be truncated at a random
578 location instead of only at frame boundaries. */
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579#define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< Normalize adaptive quantization.
580#define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT.
581#define CODEC_FLAG_LOW_DELAY 0x00080000 ///< Force low delay.
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582#define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< Place global headers in extradata instead of every keyframe.
583#define CODEC_FLAG_BITEXACT 0x00800000 ///< Use only bitexact stuff (except (I)DCT).
21e59552 584/* Fx : Flag for h263+ extra options */
f5bccd85 585#define CODEC_FLAG_AC_PRED 0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction
332f9ac4 586#define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
bb198e19 587#define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
f3eec1cf 588#define CODEC_FLAG_CLOSED_GOP 0x80000000
f5bccd85 589#define CODEC_FLAG2_FAST 0x00000001 ///< Allow non spec compliant speedup tricks.
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590#define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< Skip bitstream encoding.
591#define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< Place global headers at every keyframe instead of in extradata.
ed019b8e 592#if FF_API_MPV_GLOBAL_OPTS
af3d804f 593#define CODEC_FLAG_CBP_RD 0x04000000 ///< Use rate distortion optimization for cbp.
ff71a383 594#define CODEC_FLAG_QP_RD 0x08000000 ///< Use rate distortion optimization for qp selectioon.
a249f0cc 595#define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< Strictly enforce GOP size.
f013cb81 596#define CODEC_FLAG2_SKIP_RD 0x00004000 ///< RD optimal MB level residual skipping
ed019b8e 597#endif
f013cb81 598#define CODEC_FLAG2_CHUNKS 0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
6fc5b059 599
21e59552 600/* Unsupported options :
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601 * Syntax Arithmetic coding (SAC)
602 * Reference Picture Selection
eafcac6a 603 * Independent Segment Decoding */
21e59552 604/* /Fx */
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605/* codec capabilities */
606
f5bccd85 607#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback.
6814a25c 608/**
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609 * Codec uses get_buffer() for allocating buffers and supports custom allocators.
610 * If not set, it might not use get_buffer() at all or use operations that
611 * assume the buffer was allocated by avcodec_default_get_buffer.
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612 */
613#define CODEC_CAP_DR1 0x0002
d7425f59 614#define CODEC_CAP_TRUNCATED 0x0008
f5bccd85 615/* Codec can export data for HW decoding (XvMC). */
5e5c247a 616#define CODEC_CAP_HWACCEL 0x0010
115329f1 617/**
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618 * Encoder or decoder requires flushing with NULL input at the end in order to
619 * give the complete and correct output.
620 *
621 * NOTE: If this flag is not set, the codec is guaranteed to never be fed with
622 * with NULL data. The user can still send NULL data to the public encode
623 * or decode function, but libavcodec will not pass it along to the codec
624 * unless this flag is set.
625 *
626 * Decoders:
627 * The decoder has a non-zero delay and needs to be fed with avpkt->data=NULL,
ffeeae92 628 * avpkt->size=0 at the end to get the delayed data until the decoder no longer
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629 * returns frames.
630 *
631 * Encoders:
632 * The encoder needs to be fed with NULL data at the end of encoding until the
633 * encoder no longer returns data.
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634 *
635 * NOTE: For encoders implementing the AVCodec.encode2() function, setting this
636 * flag also means that the encoder must set the pts and duration for
637 * each output packet. If this flag is not set, the pts and duration will
638 * be determined by libavcodec from the input frame.
934982c4 639 */
6f824977 640#define CODEC_CAP_DELAY 0x0020
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641/**
642 * Codec can be fed a final frame with a smaller size.
643 * This can be used to prevent truncation of the last audio samples.
644 */
645#define CODEC_CAP_SMALL_LAST_FRAME 0x0040
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646/**
647 * Codec can export data for HW decoding (VDPAU).
648 */
649#define CODEC_CAP_HWACCEL_VDPAU 0x0080
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650/**
651 * Codec can output multiple frames per AVPacket
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652 * Normally demuxers return one frame at a time, demuxers which do not do
653 * are connected to a parser to split what they return into proper frames.
654 * This flag is reserved to the very rare category of codecs which have a
655 * bitstream that cannot be split into frames without timeconsuming
656 * operations like full decoding. Demuxers carring such bitstreams thus
657 * may return multiple frames in a packet. This has many disadvantages like
658 * prohibiting stream copy in many cases thus it should only be considered
659 * as a last resort.
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SS
660 */
661#define CODEC_CAP_SUBFRAMES 0x0100
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662/**
663 * Codec is experimental and is thus avoided in favor of non experimental
664 * encoders
665 */
666#define CODEC_CAP_EXPERIMENTAL 0x0200
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667/**
668 * Codec should fill in channel configuration and samplerate instead of container
669 */
670#define CODEC_CAP_CHANNEL_CONF 0x0400
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671/**
672 * Codec is able to deal with negative linesizes
673 */
674#define CODEC_CAP_NEG_LINESIZES 0x0800
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675/**
676 * Codec supports frame-level multithreading.
677 */
678#define CODEC_CAP_FRAME_THREADS 0x1000
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679/**
680 * Codec supports slice-based (or partition-based) multithreading.
681 */
682#define CODEC_CAP_SLICE_THREADS 0x2000
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683/**
684 * Codec supports changed parameters at any point.
685 */
686#define CODEC_CAP_PARAM_CHANGE 0x4000
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687/**
688 * Codec supports avctx->thread_count == 0 (auto).
689 */
690#define CODEC_CAP_AUTO_THREADS 0x8000
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691/**
692 * Audio encoder supports receiving a different number of samples in each call.
693 */
694#define CODEC_CAP_VARIABLE_FRAME_SIZE 0x10000
bf89e6b1 695
f5bccd85 696//The following defines may change, don't expect compatibility if you use them.
8d7ec294 697#define MB_TYPE_INTRA4x4 0x0001
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698#define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
699#define MB_TYPE_INTRA_PCM 0x0004 //FIXME H.264-specific
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700#define MB_TYPE_16x16 0x0008
701#define MB_TYPE_16x8 0x0010
702#define MB_TYPE_8x16 0x0020
703#define MB_TYPE_8x8 0x0040
704#define MB_TYPE_INTERLACED 0x0080
273b0cd3 705#define MB_TYPE_DIRECT2 0x0100 //FIXME
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706#define MB_TYPE_ACPRED 0x0200
707#define MB_TYPE_GMC 0x0400
708#define MB_TYPE_SKIP 0x0800
709#define MB_TYPE_P0L0 0x1000
710#define MB_TYPE_P1L0 0x2000
711#define MB_TYPE_P0L1 0x4000
712#define MB_TYPE_P1L1 0x8000
713#define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
714#define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
715#define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
716#define MB_TYPE_QUANT 0x00010000
717#define MB_TYPE_CBP 0x00020000
718//Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
719
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720/**
721 * Pan Scan area.
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722 * This specifies the area which should be displayed.
723 * Note there may be multiple such areas for one frame.
fa384dcc
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724 */
725typedef struct AVPanScan{
726 /**
f5bccd85
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727 * id
728 * - encoding: Set by user.
729 * - decoding: Set by libavcodec.
fa384dcc
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730 */
731 int id;
732
733 /**
734 * width and height in 1/16 pel
f5bccd85
DB
735 * - encoding: Set by user.
736 * - decoding: Set by libavcodec.
fa384dcc
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737 */
738 int width;
739 int height;
740
741 /**
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742 * position of the top left corner in 1/16 pel for up to 3 fields/frames
743 * - encoding: Set by user.
744 * - decoding: Set by libavcodec.
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745 */
746 int16_t position[3][2];
747}AVPanScan;
748
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749#define FF_QSCALE_TYPE_MPEG1 0
750#define FF_QSCALE_TYPE_MPEG2 1
751#define FF_QSCALE_TYPE_H264 2
800274f8 752#define FF_QSCALE_TYPE_VP56 3
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753
754#define FF_BUFFER_TYPE_INTERNAL 1
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755#define FF_BUFFER_TYPE_USER 2 ///< direct rendering buffers (image is (de)allocated by user)
756#define FF_BUFFER_TYPE_SHARED 4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared.
757#define FF_BUFFER_TYPE_COPY 8 ///< Just a (modified) copy of some other buffer, don't deallocate anything.
4e00e76b 758
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759#define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore).
760#define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer.
761#define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content.
762#define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update).
074c4ca7 763
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764/**
765 * @defgroup lavc_packet AVPacket
766 *
767 * Types and functions for working with AVPacket.
768 * @{
769 */
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770enum AVPacketSideDataType {
771 AV_PKT_DATA_PALETTE,
195c123c 772 AV_PKT_DATA_NEW_EXTRADATA,
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773
774 /**
775 * An AV_PKT_DATA_PARAM_CHANGE side data packet is laid out as follows:
199ada49 776 * @code
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777 * u32le param_flags
778 * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT)
779 * s32le channel_count
780 * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT)
781 * u64le channel_layout
782 * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE)
783 * s32le sample_rate
784 * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS)
785 * s32le width
786 * s32le height
199ada49 787 * @endcode
30f3f625 788 */
fe75dc85 789 AV_PKT_DATA_PARAM_CHANGE,
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790
791 /**
792 * An AV_PKT_DATA_H263_MB_INFO side data packet contains a number of
793 * structures with info about macroblocks relevant to splitting the
794 * packet into smaller packets on macroblock edges (e.g. as for RFC 2190).
795 * That is, it does not necessarily contain info about all macroblocks,
796 * as long as the distance between macroblocks in the info is smaller
797 * than the target payload size.
798 * Each MB info structure is 12 bytes, and is laid out as follows:
199ada49 799 * @code
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800 * u32le bit offset from the start of the packet
801 * u8 current quantizer at the start of the macroblock
802 * u8 GOB number
803 * u16le macroblock address within the GOB
804 * u8 horizontal MV predictor
805 * u8 vertical MV predictor
806 * u8 horizontal MV predictor for block number 3
807 * u8 vertical MV predictor for block number 3
199ada49 808 * @endcode
30f3f625 809 */
bdc1220e 810 AV_PKT_DATA_H263_MB_INFO,
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811};
812
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813typedef struct AVPacket {
814 /**
7b356d39
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815 * Presentation timestamp in AVStream->time_base units; the time at which
816 * the decompressed packet will be presented to the user.
18c915ee
TB
817 * Can be AV_NOPTS_VALUE if it is not stored in the file.
818 * pts MUST be larger or equal to dts as presentation cannot happen before
819 * decompression, unless one wants to view hex dumps. Some formats misuse
820 * the terms dts and pts/cts to mean something different. Such timestamps
821 * must be converted to true pts/dts before they are stored in AVPacket.
822 */
823 int64_t pts;
824 /**
7b356d39
RS
825 * Decompression timestamp in AVStream->time_base units; the time at which
826 * the packet is decompressed.
18c915ee
TB
827 * Can be AV_NOPTS_VALUE if it is not stored in the file.
828 */
829 int64_t dts;
830 uint8_t *data;
831 int size;
832 int stream_index;
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833 /**
834 * A combination of AV_PKT_FLAG values
835 */
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836 int flags;
837 /**
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838 * Additional packet data that can be provided by the container.
839 * Packet can contain several types of side information.
840 */
841 struct {
842 uint8_t *data;
843 int size;
844 enum AVPacketSideDataType type;
845 } *side_data;
846 int side_data_elems;
847
848 /**
7b356d39 849 * Duration of this packet in AVStream->time_base units, 0 if unknown.
18c915ee
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850 * Equals next_pts - this_pts in presentation order.
851 */
852 int duration;
853 void (*destruct)(struct AVPacket *);
854 void *priv;
855 int64_t pos; ///< byte position in stream, -1 if unknown
856
857 /**
7b356d39 858 * Time difference in AVStream->time_base units from the pts of this
18c915ee
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859 * packet to the point at which the output from the decoder has converged
860 * independent from the availability of previous frames. That is, the
861 * frames are virtually identical no matter if decoding started from
862 * the very first frame or from this keyframe.
863 * Is AV_NOPTS_VALUE if unknown.
864 * This field is not the display duration of the current packet.
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865 * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
866 * set.
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867 *
868 * The purpose of this field is to allow seeking in streams that have no
869 * keyframes in the conventional sense. It corresponds to the
870 * recovery point SEI in H.264 and match_time_delta in NUT. It is also
871 * essential for some types of subtitle streams to ensure that all
872 * subtitles are correctly displayed after seeking.
873 */
874 int64_t convergence_duration;
875} AVPacket;
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876#define AV_PKT_FLAG_KEY 0x0001 ///< The packet contains a keyframe
877#define AV_PKT_FLAG_CORRUPT 0x0002 ///< The packet content is corrupted
18c915ee 878
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879enum AVSideDataParamChangeFlags {
880 AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT = 0x0001,
881 AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT = 0x0002,
882 AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE = 0x0004,
883 AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS = 0x0008,
884};
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885/**
886 * @}
887 */
fe75dc85
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888
889/**
0da71265 890 * Audio Video Frame.
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891 * New fields can be added to the end of AVFRAME with minor version
892 * bumps. Removal, reordering and changes to existing fields require
893 * a major version bump.
8bfb108b 894 * sizeof(AVFrame) must not be used outside libav*.
0da71265 895 */
492cd3a9 896typedef struct AVFrame {
560f773c 897#define AV_NUM_DATA_POINTERS 8
657ccb5a 898 /**
0eea2129 899 * pointer to the picture/channel planes.
657ccb5a 900 * This might be different from the first allocated byte
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901 * - encoding: Set by user
902 * - decoding: set by AVCodecContext.get_buffer()
657ccb5a 903 */
560f773c 904 uint8_t *data[AV_NUM_DATA_POINTERS];
0eea2129
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905
906 /**
907 * Size, in bytes, of the data for each picture/channel plane.
908 *
909 * For audio, only linesize[0] may be set. For planar audio, each channel
910 * plane must be the same size.
911 *
9814974d 912 * - encoding: Set by user
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913 * - decoding: set by AVCodecContext.get_buffer()
914 */
560f773c 915 int linesize[AV_NUM_DATA_POINTERS];
0eea2129 916
657ccb5a 917 /**
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918 * pointers to the data planes/channels.
919 *
920 * For video, this should simply point to data[].
921 *
922 * For planar audio, each channel has a separate data pointer, and
923 * linesize[0] contains the size of each channel buffer.
924 * For packed audio, there is just one data pointer, and linesize[0]
925 * contains the total size of the buffer for all channels.
926 *
927 * Note: Both data and extended_data will always be set by get_buffer(),
928 * but for planar audio with more channels that can fit in data,
929 * extended_data must be used by the decoder in order to access all
930 * channels.
931 *
932 * encoding: unused
933 * decoding: set by AVCodecContext.get_buffer()
657ccb5a 934 */
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935 uint8_t **extended_data;
936
937 /**
938 * width and height of the video frame
939 * - encoding: unused
940 * - decoding: Read by user.
941 */
942 int width, height;
943
944 /**
945 * number of audio samples (per channel) described by this frame
946 * - encoding: Set by user
947 * - decoding: Set by libavcodec
948 */
949 int nb_samples;
950
951 /**
952 * format of the frame, -1 if unknown or unset
953 * Values correspond to enum PixelFormat for video frames,
954 * enum AVSampleFormat for audio)
955 * - encoding: unused
956 * - decoding: Read by user.
957 */
958 int format;
959
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960 /**
961 * 1 -> keyframe, 0-> not
962 * - encoding: Set by libavcodec.
963 * - decoding: Set by libavcodec.
964 */
965 int key_frame;
966
967 /**
968 * Picture type of the frame, see ?_TYPE below.
969 * - encoding: Set by libavcodec. for coded_picture (and set by user for input).
970 * - decoding: Set by libavcodec.
971 */
972 enum AVPictureType pict_type;
973
974 /**
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975 * pointer to the first allocated byte of the picture. Can be used in get_buffer/release_buffer.
976 * This isn't used by libavcodec unless the default get/release_buffer() is used.
977 * - encoding:
978 * - decoding:
979 */
980 uint8_t *base[AV_NUM_DATA_POINTERS];
981
982 /**
40ca0e6a 983 * sample aspect ratio for the video frame, 0/1 if unknown/unspecified
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984 * - encoding: unused
985 * - decoding: Read by user.
986 */
987 AVRational sample_aspect_ratio;
988
989 /**
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990 * presentation timestamp in time_base units (time when frame should be shown to user)
991 * If AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed.
992 * - encoding: MUST be set by user.
993 * - decoding: Set by libavcodec.
994 */
995 int64_t pts;
996
997 /**
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998 * reordered pts from the last AVPacket that has been input into the decoder
999 * - encoding: unused
1000 * - decoding: Read by user.
1001 */
1002 int64_t pkt_pts;
1003
1004 /**
1005 * dts from the last AVPacket that has been input into the decoder
1006 * - encoding: unused
1007 * - decoding: Read by user.
1008 */
1009 int64_t pkt_dts;
1010
1011 /**
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1012 * picture number in bitstream order
1013 * - encoding: set by
1014 * - decoding: Set by libavcodec.
1015 */
1016 int coded_picture_number;
1017 /**
1018 * picture number in display order
1019 * - encoding: set by
1020 * - decoding: Set by libavcodec.
1021 */
1022 int display_picture_number;
1023
1024 /**
1025 * quality (between 1 (good) and FF_LAMBDA_MAX (bad))
1026 * - encoding: Set by libavcodec. for coded_picture (and set by user for input).
1027 * - decoding: Set by libavcodec.
1028 */
1029 int quality;
1030
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1031 /**
1032 * is this picture used as reference
1033 * The values for this are the same as the MpegEncContext.picture_structure
1034 * variable, that is 1->top field, 2->bottom field, 3->frame/both fields.
1035 * Set to 4 for delayed, non-reference frames.
1036 * - encoding: unused
1037 * - decoding: Set by libavcodec. (before get_buffer() call)).
1038 */
1039 int reference;
1040
1041 /**
1042 * QP table
1043 * - encoding: unused
1044 * - decoding: Set by libavcodec.
1045 */
1046 int8_t *qscale_table;
1047 /**
1048 * QP store stride
1049 * - encoding: unused
1050 * - decoding: Set by libavcodec.
1051 */
1052 int qstride;
1053
1054 /**
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1055 *
1056 */
1057 int qscale_type;
1058
1059 /**
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1060 * mbskip_table[mb]>=1 if MB didn't change
1061 * stride= mb_width = (width+15)>>4
1062 * - encoding: unused
1063 * - decoding: Set by libavcodec.
1064 */
1065 uint8_t *mbskip_table;
1066
1067 /**
1068 * motion vector table
1069 * @code
1070 * example:
1071 * int mv_sample_log2= 4 - motion_subsample_log2;
1072 * int mb_width= (width+15)>>4;
1073 * int mv_stride= (mb_width << mv_sample_log2) + 1;
1074 * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];
1075 * @endcode
1076 * - encoding: Set by user.
1077 * - decoding: Set by libavcodec.
1078 */
1079 int16_t (*motion_val[2])[2];
1080
1081 /**
1082 * macroblock type table
1083 * mb_type_base + mb_width + 2
1084 * - encoding: Set by user.
1085 * - decoding: Set by libavcodec.
1086 */
1087 uint32_t *mb_type;
1088
1089 /**
1d428004 1090 * DCT coefficients
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1091 * - encoding: unused
1092 * - decoding: Set by libavcodec.
1093 */
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1094 short *dct_coeff;
1095
1096 /**
1097 * motion reference frame index
1098 * the order in which these are stored can depend on the codec.
1099 * - encoding: Set by user.
1100 * - decoding: Set by libavcodec.
1101 */
1102 int8_t *ref_index[2];
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1103
1104 /**
1105 * for some private data of the user
1106 * - encoding: unused
1107 * - decoding: Set by user.
1108 */
1109 void *opaque;
1110
1111 /**
1112 * error
1113 * - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR.
1114 * - decoding: unused
1115 */
560f773c 1116 uint64_t error[AV_NUM_DATA_POINTERS];
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DB
1117
1118 /**
1119 * type of the buffer (to keep track of who has to deallocate data[*])
1120 * - encoding: Set by the one who allocates it.
1121 * - decoding: Set by the one who allocates it.
1122 * Note: User allocated (direct rendering) & internal buffers cannot coexist currently.
1123 */
1124 int type;
1125
1126 /**
1127 * When decoding, this signals how much the picture must be delayed.
1128 * extra_delay = repeat_pict / (2*fps)
1129 * - encoding: unused
1130 * - decoding: Set by libavcodec.
1131 */
1132 int repeat_pict;
1133
1134 /**
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DB
1135 * The content of the picture is interlaced.
1136 * - encoding: Set by user.
1137 * - decoding: Set by libavcodec. (default 0)
1138 */
1139 int interlaced_frame;
1140
1141 /**
1142 * If the content is interlaced, is top field displayed first.
1143 * - encoding: Set by user.
1144 * - decoding: Set by libavcodec.
1145 */
1146 int top_field_first;
1147
1148 /**
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DB
1149 * Tell user application that palette has changed from previous frame.
1150 * - encoding: ??? (no palette-enabled encoder yet)
1151 * - decoding: Set by libavcodec. (default 0).
1152 */
1153 int palette_has_changed;
1154
1155 /**
1156 * codec suggestion on buffer type if != 0
1157 * - encoding: unused
1158 * - decoding: Set by libavcodec. (before get_buffer() call)).
1159 */
1160 int buffer_hints;
1161
1162 /**
1d428004 1163 * Pan scan.
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DB
1164 * - encoding: Set by user.
1165 * - decoding: Set by libavcodec.
1166 */
1d428004 1167 AVPanScan *pan_scan;
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DB
1168
1169 /**
1170 * reordered opaque 64bit (generally an integer or a double precision float
1171 * PTS but can be anything).
1172 * The user sets AVCodecContext.reordered_opaque to represent the input at
1173 * that time,
1174 * the decoder reorders values as needed and sets AVFrame.reordered_opaque
1175 * to exactly one of the values provided by the user through AVCodecContext.reordered_opaque
1176 * @deprecated in favor of pkt_pts
1177 * - encoding: unused
1178 * - decoding: Read by user.
1179 */
1180 int64_t reordered_opaque;
1181
1182 /**
1183 * hardware accelerator private data (Libav-allocated)
1184 * - encoding: unused
1185 * - decoding: Set by libavcodec
1186 */
1187 void *hwaccel_picture_private;
1188
1189 /**
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DB
1190 * the AVCodecContext which ff_thread_get_buffer() was last called on
1191 * - encoding: Set by libavcodec.
1192 * - decoding: Set by libavcodec.
1193 */
1194 struct AVCodecContext *owner;
1195
1196 /**
1197 * used by multithreading to store frame-specific info
1198 * - encoding: Set by libavcodec.
1199 * - decoding: Set by libavcodec.
1200 */
1201 void *thread_opaque;
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1202
1203 /**
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1204 * log2 of the size of the block which a single vector in motion_val represents:
1205 * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)
8a4a5f6f 1206 * - encoding: unused
1d428004 1207 * - decoding: Set by libavcodec.
8a4a5f6f 1208 */
1d428004 1209 uint8_t motion_subsample_log2;
492cd3a9 1210} AVFrame;
1e491e29 1211
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JR
1212struct AVCodecInternal;
1213
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AC
1214enum AVFieldOrder {
1215 AV_FIELD_UNKNOWN,
1216 AV_FIELD_PROGRESSIVE,
1217 AV_FIELD_TT, //< Top coded_first, top displayed first
1218 AV_FIELD_BB, //< Bottom coded first, bottom displayed first
1219 AV_FIELD_TB, //< Top coded first, bottom displayed first
1220 AV_FIELD_BT, //< Bottom coded first, top displayed first
1221};
1222
d33c949c 1223/**
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1224 * main external API structure.
1225 * New fields can be added to the end with minor version bumps.
8bfb108b 1226 * Removal, reordering and changes to existing fields require a major
252f17e2 1227 * version bump.
8bfb108b 1228 * sizeof(AVCodecContext) must not be used outside libav*.
d33c949c 1229 */
de6d9b64 1230typedef struct AVCodecContext {
b71901e6 1231 /**
f5bccd85 1232 * information on struct for av_log
488eec10 1233 * - set by avcodec_alloc_context3
bc874dae 1234 */
d42a814e 1235 const AVClass *av_class;
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1236 int log_level_offset;
1237
1238 enum AVMediaType codec_type; /* see AVMEDIA_TYPE_xxx */
1239 struct AVCodec *codec;
1240 char codec_name[32];
1241 enum CodecID codec_id; /* see CODEC_ID_xxx */
1242
1243 /**
1244 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1245 * This is used to work around some encoder bugs.
1246 * A demuxer should set this to what is stored in the field used to identify the codec.
1247 * If there are multiple such fields in a container then the demuxer should choose the one
1248 * which maximizes the information about the used codec.
1249 * If the codec tag field in a container is larger than 32 bits then the demuxer should
1250 * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
1251 * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
1252 * first.
1253 * - encoding: Set by user, if not then the default based on codec_id will be used.
1254 * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1255 */
1256 unsigned int codec_tag;
1257
1258 /**
1259 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1260 * This is used to work around some encoder bugs.
1261 * - encoding: unused
1262 * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1263 */
1264 unsigned int stream_codec_tag;
1265
02beb982 1266#if FF_API_SUB_ID
b1edfce0 1267 /**
02beb982 1268 * @deprecated this field is unused
b1edfce0 1269 */
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1270 attribute_deprecated int sub_id;
1271#endif
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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
bc874dae 1290 /**
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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.
b71901e6 1294 */
de6d9b64 1295 int bit_rate;
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1296
1297 /**
64863965 1298 * number of bits the bitstream is allowed to diverge from the reference.
b71901e6 1299 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
f5bccd85 1300 * - encoding: Set by user; unused for constant quantizer encoding.
64863965 1301 * - decoding: unused
b71901e6 1302 */
115329f1 1303 int bit_rate_tolerance;
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1304
1305 /**
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1306 * Global quality for codecs which cannot change it per frame.
1307 * This should be proportional to MPEG-1/2/4 qscale.
f5bccd85 1308 * - encoding: Set by user.
b1edfce0 1309 * - decoding: unused
b71901e6 1310 */
b1edfce0 1311 int global_quality;
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1312
1313 /**
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1314 * - encoding: Set by user.
1315 * - decoding: unused
b71901e6 1316 */
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1317 int compression_level;
1318#define FF_COMPRESSION_DEFAULT -1
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1319
1320 /**
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1321 * CODEC_FLAG_*.
1322 * - encoding: Set by user.
1323 * - decoding: Set by user.
b71901e6 1324 */
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1325 int flags;
1326
1327 /**
1328 * CODEC_FLAG2_*
1329 * - encoding: Set by user.
1330 * - decoding: Set by user.
1331 */
1332 int flags2;
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MN
1333
1334 /**
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DB
1335 * some codecs need / can use extradata like Huffman tables.
1336 * mjpeg: Huffman tables
b71901e6 1337 * rv10: additional flags
b704e742 1338 * mpeg4: global headers (they can be in the bitstream or here)
f5bccd85
DB
1339 * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
1340 * than extradata_size to avoid prolems 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.
b71901e6 1344 */
58f2a4b0 1345 uint8_t *extradata;
e84c31dc 1346 int extradata_size;
115329f1 1347
b71901e6 1348 /**
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DB
1349 * This is the fundamental unit of time (in seconds) in terms
1350 * of which frame timestamps are represented. For fixed-fps content,
5b28c8c3
MN
1351 * timebase should be 1/framerate and timestamp increments should be
1352 * identically 1.
f5bccd85
DB
1353 * - encoding: MUST be set by user.
1354 * - decoding: Set by libavcodec.
b71901e6 1355 */
c0df9d75 1356 AVRational time_base;
115329f1 1357
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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 * Encoder delay.
1369 *
1370 * Video:
1371 * Number of frames the decoded output will be delayed relative to the
1372 * encoded input.
1373 *
1374 * Audio:
1375 * Number of "priming" samples added to the beginning of the stream
1376 * during encoding. The decoded output will be delayed by this many
1377 * samples relative to the input to the encoder. Note that this field is
1378 * purely informational and does not directly affect the pts output by
1379 * the encoder, which should always be based on the actual presentation
1380 * time, including any delay.
1381 *
1382 * - encoding: Set by libavcodec.
1383 * - decoding: unused
1384 */
1385 int delay;
1386
1387
5b28c8c3 1388 /* video only */
14bea432 1389 /**
21adafec 1390 * picture width / height.
115329f1 1391 * - encoding: MUST be set by user.
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1392 * - decoding: Set by libavcodec.
1393 * Note: For compatibility it is possible to set this instead of
1394 * coded_width/height before decoding.
b71901e6 1395 */
de6d9b64 1396 int width, height;
115329f1 1397
b1edfce0 1398 /**
2bcbd984 1399 * Bitstream width / height, may be different from width/height.
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1400 * - encoding: unused
1401 * - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
1402 */
1403 int coded_width, coded_height;
1404
e769f053 1405#define FF_ASPECT_EXTENDED 15
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1406
1407 /**
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DB
1408 * the number of pictures in a group of pictures, or 0 for intra_only
1409 * - encoding: Set by user.
64863965 1410 * - decoding: unused
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1411 */
1412 int gop_size;
1413
1414 /**
f5bccd85 1415 * Pixel format, see PIX_FMT_xxx.
c1bdc930
TH
1416 * May be set by the demuxer if known from headers.
1417 * May be overriden by the decoder if it knows better.
f5bccd85 1418 * - encoding: Set by user.
c1bdc930 1419 * - decoding: Set by user if known, overridden by libavcodec if known
b71901e6 1420 */
e4eadb4b 1421 enum PixelFormat pix_fmt;
115329f1 1422
b71901e6 1423 /**
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1424 * Motion estimation algorithm used for video coding.
1425 * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
1426 * 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific]
1427 * - encoding: MUST be set by user.
1428 * - decoding: unused
1429 */
1430 int me_method;
1431
1432 /**
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DB
1433 * If non NULL, 'draw_horiz_band' is called by the libavcodec
1434 * decoder to draw a horizontal band. It improves cache usage. Not
b71901e6 1435 * all codecs can do that. You must check the codec capabilities
f5bccd85 1436 * beforehand.
37b00b47
AS
1437 * When multithreading is used, it may be called from multiple threads
1438 * at the same time; threads might draw different parts of the same AVFrame,
1439 * or multiple AVFrames, and there is no guarantee that slices will be drawn
1440 * in order.
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IK
1441 * The function is also used by hardware acceleration APIs.
1442 * It is called at least once during frame decoding to pass
1443 * the data needed for hardware render.
1444 * In that mode instead of pixel data, AVFrame points to
1445 * a structure specific to the acceleration API. The application
1446 * reads the structure and can change some fields to indicate progress
1447 * or mark state.
64863965 1448 * - encoding: unused
f5bccd85 1449 * - decoding: Set by user.
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1450 * @param height the height of the slice
1451 * @param y the y position of the slice
1452 * @param type 1->top field, 2->bottom field, 3->frame
1453 * @param offset offset into the AVFrame.data from which the slice should be read
b71901e6 1454 */
bf89e6b1 1455 void (*draw_horiz_band)(struct AVCodecContext *s,
560f773c 1456 const AVFrame *src, int offset[AV_NUM_DATA_POINTERS],
3bb07d61 1457 int y, int type, int height);
bf89e6b1 1458
a3a5f4d6 1459 /**
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1460 * callback to negotiate the pixelFormat
1461 * @param fmt is the list of formats which are supported by the codec,
1462 * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
1463 * The first is always the native one.
1464 * @return the chosen format
1465 * - encoding: unused
1466 * - decoding: Set by user, if not set the native format will be chosen.
a3a5f4d6 1467 */
b1edfce0 1468 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
de6d9b64 1469
718b27a7 1470 /**
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1471 * maximum number of B-frames between non-B-frames
1472 * Note: The output will be delayed by max_b_frames+1 relative to the input.
1473 * - encoding: Set by user.
1474 * - decoding: unused
718b27a7 1475 */
b1edfce0 1476 int max_b_frames;
115329f1 1477
b71901e6 1478 /**
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1479 * qscale factor between IP and B-frames
1480 * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
1481 * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1482 * - encoding: Set by user.
64863965 1483 * - decoding: unused
b71901e6 1484 */
b1edfce0 1485 float b_quant_factor;
115329f1 1486
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1487 /** obsolete FIXME remove */
1488 int rc_strategy;
1489#define FF_RC_STRATEGY_XVID 1
1490
1491 int b_frame_strategy;
115329f1 1492
63efd83a 1493#if FF_API_MPV_GLOBAL_OPTS
b71901e6 1494 /**
b1edfce0 1495 * luma single coefficient elimination threshold
f5bccd85 1496 * - encoding: Set by user.
64863965 1497 * - decoding: unused
b71901e6 1498 */
63efd83a 1499 attribute_deprecated int luma_elim_threshold;
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1500
1501 /**
b1edfce0 1502 * chroma single coeff elimination threshold
f5bccd85 1503 * - encoding: Set by user.
64863965 1504 * - decoding: unused
b71901e6 1505 */
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1506 attribute_deprecated int chroma_elim_threshold;
1507#endif
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MN
1508
1509 /**
b1edfce0 1510 * qscale offset between IP and B-frames
f5bccd85 1511 * - encoding: Set by user.
64863965 1512 * - decoding: unused
b71901e6 1513 */
b1edfce0 1514 float b_quant_offset;
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1515
1516 /**
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1517 * Size of the frame reordering buffer in the decoder.
1518 * For MPEG-2 it is 1 IPB or 0 low delay IP.
1519 * - encoding: Set by libavcodec.
1520 * - decoding: Set by libavcodec.
1521 */
1522 int has_b_frames;
1523
1524 /**
1525 * 0-> h263 quant 1-> mpeg quant
f5bccd85 1526 * - encoding: Set by user.
64863965 1527 * - decoding: unused
b71901e6 1528 */
b1edfce0 1529 int mpeg_quant;
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MN
1530
1531 /**
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1532 * qscale factor between P and I-frames
1533 * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
662e5411 1534 * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
f5bccd85 1535 * - encoding: Set by user.
64863965 1536 * - decoding: unused
b71901e6 1537 */
b1edfce0 1538 float i_quant_factor;
64b7c5b6 1539
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1540 /**
1541 * qscale offset between P and I-frames
1542 * - encoding: Set by user.
1543 * - decoding: unused
1544 */
1545 float i_quant_offset;
9dbcbd92 1546
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1547 /**
1548 * luminance masking (0-> disabled)
1549 * - encoding: Set by user.
1550 * - decoding: unused
1551 */
1552 float lumi_masking;
115329f1 1553
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1554 /**
1555 * temporary complexity masking (0-> disabled)
1556 * - encoding: Set by user.
1557 * - decoding: unused
1558 */
1559 float temporal_cplx_masking;
de6d9b64 1560
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1561 /**
1562 * spatial complexity masking (0-> disabled)
1563 * - encoding: Set by user.
1564 * - decoding: unused
1565 */
1566 float spatial_cplx_masking;
115329f1 1567
b71901e6 1568 /**
b1edfce0 1569 * p block masking (0-> disabled)
f5bccd85 1570 * - encoding: Set by user.
64863965 1571 * - decoding: unused
b71901e6 1572 */
b1edfce0 1573 float p_masking;
115329f1 1574
b71901e6 1575 /**
b1edfce0 1576 * darkness masking (0-> disabled)
f5bccd85 1577 * - encoding: Set by user.
64863965 1578 * - decoding: unused
b71901e6 1579 */
b1edfce0 1580 float dark_masking;
115329f1 1581
b71901e6 1582 /**
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1583 * slice count
1584 * - encoding: Set by libavcodec.
1585 * - decoding: Set by user (or 0).
b71901e6 1586 */
b1edfce0 1587 int slice_count;
b71901e6 1588 /**
b1edfce0 1589 * prediction method (needed for huffyuv)
f5bccd85 1590 * - encoding: Set by user.
64863965 1591 * - decoding: unused
b71901e6 1592 */
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1593 int prediction_method;
1594#define FF_PRED_LEFT 0
1595#define FF_PRED_PLANE 1
1596#define FF_PRED_MEDIAN 2
115329f1 1597
b71901e6 1598 /**
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1599 * slice offsets in the frame in bytes
1600 * - encoding: Set/allocated by libavcodec.
1601 * - decoding: Set/allocated by user (or NULL).
b71901e6 1602 */
b1edfce0 1603 int *slice_offset;
0fd90455 1604
b71901e6 1605 /**
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1606 * sample aspect ratio (0 if unknown)
1607 * That is the width of a pixel divided by the height of the pixel.
1608 * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
1609 * - encoding: Set by user.
f5bccd85 1610 * - decoding: Set by libavcodec.
b71901e6 1611 */
b1edfce0 1612 AVRational sample_aspect_ratio;
115329f1 1613
b71901e6 1614 /**
b1edfce0 1615 * motion estimation comparison function
f5bccd85 1616 * - encoding: Set by user.
64863965 1617 * - decoding: unused
b71901e6 1618 */
b1edfce0 1619 int me_cmp;
b71901e6 1620 /**
b1edfce0 1621 * subpixel motion estimation comparison function
f5bccd85 1622 * - encoding: Set by user.
64863965 1623 * - decoding: unused
b71901e6 1624 */
b1edfce0 1625 int me_sub_cmp;
b71901e6 1626 /**
b1edfce0 1627 * macroblock comparison function (not supported yet)
f5bccd85 1628 * - encoding: Set by user.
64863965 1629 * - decoding: unused
b71901e6 1630 */
b1edfce0 1631 int mb_cmp;
b71901e6 1632 /**
b1edfce0 1633 * interlaced DCT comparison function
f5bccd85 1634 * - encoding: Set by user.
64863965 1635 * - decoding: unused
b71901e6 1636 */
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1637 int ildct_cmp;
1638#define FF_CMP_SAD 0
1639#define FF_CMP_SSE 1
1640#define FF_CMP_SATD 2
1641#define FF_CMP_DCT 3
1642#define FF_CMP_PSNR 4
1643#define FF_CMP_BIT 5
1644#define FF_CMP_RD 6
1645#define FF_CMP_ZERO 7
1646#define FF_CMP_VSAD 8
1647#define FF_CMP_VSSE 9
1648#define FF_CMP_NSSE 10
1649#define FF_CMP_W53 11
1650#define FF_CMP_W97 12
1651#define FF_CMP_DCTMAX 13
1652#define FF_CMP_DCT264 14
1653#define FF_CMP_CHROMA 256
115329f1 1654
b71901e6 1655 /**
b1edfce0 1656 * ME diamond size & shape
f5bccd85 1657 * - encoding: Set by user.
64863965 1658 * - decoding: unused
b71901e6 1659 */
b1edfce0 1660 int dia_size;
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1661
1662 /**
b1edfce0 1663 * amount of previous MV predictors (2a+1 x 2a+1 square)
f5bccd85 1664 * - encoding: Set by user.
64863965 1665 * - decoding: unused
b71901e6 1666 */
b1edfce0 1667 int last_predictor_count;
115329f1 1668
b71901e6 1669 /**
b1edfce0 1670 * prepass for motion estimation
f5bccd85 1671 * - encoding: Set by user.
64863965 1672 * - decoding: unused
b71901e6 1673 */
b1edfce0 1674 int pre_me;
115329f1 1675
b71901e6 1676 /**
b1edfce0 1677 * motion estimation prepass comparison function
f5bccd85 1678 * - encoding: Set by user.
64863965 1679 * - decoding: unused
b71901e6 1680 */
b1edfce0 1681 int me_pre_cmp;
917e06c8 1682
b71901e6 1683 /**
b1edfce0 1684 * ME prepass diamond size & shape
f5bccd85 1685 * - encoding: Set by user.
64863965 1686 * - decoding: unused
b71901e6 1687 */
b1edfce0 1688 int pre_dia_size;
115329f1 1689
c5d309f2 1690 /**
b1edfce0 1691 * subpel ME quality
f5bccd85 1692 * - encoding: Set by user.
64863965 1693 * - decoding: unused
c5d309f2 1694 */
b1edfce0 1695 int me_subpel_quality;
115329f1 1696
c5d309f2 1697 /**
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1698 * DTG active format information (additional aspect ratio
1699 * information only used in DVB MPEG-2 transport streams)
1700 * 0 if not set.
1701 *
1702 * - encoding: unused
1703 * - decoding: Set by decoder.
c5d309f2 1704 */
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1705 int dtg_active_format;
1706#define FF_DTG_AFD_SAME 8
1707#define FF_DTG_AFD_4_3 9
1708#define FF_DTG_AFD_16_9 10
1709#define FF_DTG_AFD_14_9 11
1710#define FF_DTG_AFD_4_3_SP_14_9 13
1711#define FF_DTG_AFD_16_9_SP_14_9 14
1712#define FF_DTG_AFD_SP_4_3 15
115329f1 1713
c5d309f2 1714 /**
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1715 * maximum motion estimation search range in subpel units
1716 * If 0 then no limit.
1717 *
f5bccd85 1718 * - encoding: Set by user.
64863965 1719 * - decoding: unused
c5d309f2 1720 */
b1edfce0 1721 int me_range;
115329f1 1722
c5d309f2 1723 /**
b1edfce0 1724 * intra quantizer bias
f5bccd85 1725 * - encoding: Set by user.
64863965 1726 * - decoding: unused
c5d309f2 1727 */
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1728 int intra_quant_bias;
1729#define FF_DEFAULT_QUANT_BIAS 999999
15415af4 1730
5e746b99 1731 /**
b1edfce0 1732 * inter quantizer bias
f5bccd85 1733 * - encoding: Set by user.
64863965 1734 * - decoding: unused
5e746b99 1735 */
b1edfce0 1736 int inter_quant_bias;
115329f1 1737
4f07f819 1738#if FF_API_COLOR_TABLE_ID
0c2dd16e 1739 /**
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1740 * color table ID
1741 * - encoding: unused
1742 * - decoding: Which clrtable should be used for 8bit RGB images.
1743 * Tables have to be stored somewhere. FIXME
2ad1516a 1744 */
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1745 attribute_deprecated int color_table_id;
1746#endif
2ad1516a 1747
144f0625 1748 /**
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1749 * slice flags
1750 * - encoding: unused
1751 * - decoding: Set by user.
144f0625 1752 */
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1753 int slice_flags;
1754#define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1755#define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1756#define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1757
144f0625 1758 /**
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1759 * XVideo Motion Acceleration
1760 * - encoding: forbidden
1761 * - decoding: set by decoder
144f0625 1762 */
b1edfce0 1763 int xvmc_acceleration;
144f0625 1764
4d2858de 1765 /**
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1766 * macroblock decision mode
1767 * - encoding: Set by user.
1768 * - decoding: unused
4d2858de 1769 */
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1770 int mb_decision;
1771#define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1772#define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1773#define FF_MB_DECISION_RD 2 ///< rate distortion
4d2858de 1774
6b72ac63 1775 /**
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1776 * custom intra quantization matrix
1777 * - encoding: Set by user, can be NULL.
1778 * - decoding: Set by libavcodec.
bec89a84 1779 */
b1edfce0 1780 uint16_t *intra_matrix;
7160bb71 1781
11f18faf 1782 /**
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1783 * custom inter quantization matrix
1784 * - encoding: Set by user, can be NULL.
1785 * - decoding: Set by libavcodec.
11f18faf 1786 */
b1edfce0 1787 uint16_t *inter_matrix;
115329f1 1788
11f18faf 1789 /**
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1790 * scene change detection threshold
1791 * 0 is default, larger means fewer detected scene changes.
f5bccd85 1792 * - encoding: Set by user.
64863965 1793 * - decoding: unused
11f18faf 1794 */
b1edfce0 1795 int scenechange_threshold;
115329f1 1796
5d3cea3a 1797 /**
b1edfce0 1798 * noise reduction strength
f5bccd85 1799 * - encoding: Set by user.
b1edfce0 1800 * - decoding: unused
5d3cea3a 1801 */
b1edfce0 1802 int noise_reduction;
1e491e29 1803
16b7557b 1804#if FF_API_INTER_THRESHOLD
1e491e29 1805 /**
16b7557b 1806 * @deprecated this field is unused
1e491e29 1807 */
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1808 attribute_deprecated int inter_threshold;
1809#endif
c8c437bc 1810
23bfcc06 1811#if FF_API_MPV_GLOBAL_OPTS
c8c437bc 1812 /**
23bfcc06 1813 * @deprecated use mpegvideo private options instead
c8c437bc 1814 */
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1815 attribute_deprecated int quantizer_noise_shaping;
1816#endif
115329f1 1817
140cb663 1818 /**
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1819 * Motion estimation threshold below which no motion estimation is
1820 * performed, but instead the user specified motion vectors are used.
1821 *
f5bccd85 1822 * - encoding: Set by user.
b1edfce0 1823 * - decoding: unused
0c9bbaec 1824 */
b1edfce0 1825 int me_threshold;
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1826
1827 /**
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1828 * Macroblock threshold below which the user specified macroblock types will be used.
1829 * - encoding: Set by user.
64863965 1830 * - decoding: unused
140cb663 1831 */
b1edfce0 1832 int mb_threshold;
115329f1 1833
1457ab52 1834 /**
b1edfce0 1835 * precision of the intra DC coefficient - 8
f5bccd85 1836 * - encoding: Set by user.
64863965 1837 * - decoding: unused
1457ab52 1838 */
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1839 int intra_dc_precision;
1840
1457ab52 1841 /**
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1842 * Number of macroblock rows at the top which are skipped.
1843 * - encoding: unused
1844 * - decoding: Set by user.
1457ab52 1845 */
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1846 int skip_top;
1847
1457ab52 1848 /**
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1849 * Number of macroblock rows at the bottom which are skipped.
1850 * - encoding: unused
1851 * - decoding: Set by user.
1457ab52 1852 */
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1853 int skip_bottom;
1854
622348f9 1855 /**
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1856 * Border processing masking, raises the quantizer for mbs on the borders
1857 * of the picture.
f5bccd85 1858 * - encoding: Set by user.
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1859 * - decoding: unused
1860 */
b1edfce0 1861 float border_masking;
115329f1 1862
1457ab52 1863 /**
b1edfce0 1864 * minimum MB lagrange multipler
f5bccd85 1865 * - encoding: Set by user.
64863965 1866 * - decoding: unused
1457ab52 1867 */
b1edfce0 1868 int mb_lmin;
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1869
1870 /**
b1edfce0 1871 * maximum MB lagrange multipler
f5bccd85 1872 * - encoding: Set by user.
64863965 1873 * - decoding: unused
b07a5980 1874 */
b1edfce0 1875 int mb_lmax;
70ac76c0 1876
f5fb6b34 1877 /**
b1edfce0 1878 *
f5bccd85 1879 * - encoding: Set by user.
64863965 1880 * - decoding: unused
f5fb6b34 1881 */
b1edfce0 1882 int me_penalty_compensation;
b07a5980 1883
70ac76c0 1884 /**
b1edfce0 1885 *
f5bccd85 1886 * - encoding: Set by user.
64863965 1887 * - decoding: unused
70ac76c0 1888 */
b1edfce0 1889 int bidir_refine;
826f429a 1890
70ac76c0 1891 /**
b1edfce0 1892 *
f5bccd85 1893 * - encoding: Set by user.
64863965 1894 * - decoding: unused
70ac76c0 1895 */
b1edfce0 1896 int brd_scale;
70ac76c0 1897
826f429a 1898 /**
b1edfce0 1899 * minimum GOP size
f5bccd85 1900 * - encoding: Set by user.
64863965 1901 * - decoding: unused
826f429a 1902 */
b1edfce0 1903 int keyint_min;
826f429a 1904
a33c7159 1905 /**
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1906 * number of reference frames
1907 * - encoding: Set by user.
1908 * - decoding: Set by lavc.
a33c7159 1909 */
b1edfce0 1910 int refs;
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FB
1911
1912 /**
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1913 * chroma qp offset from luma
1914 * - encoding: Set by user.
1915 * - decoding: unused
e2f9490e 1916 */
b1edfce0 1917 int chromaoffset;
e2f9490e 1918
ebbcdc9a 1919 /**
b1edfce0 1920 * Multiplied by qscale for each frame and added to scene_change_score.
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DB
1921 * - encoding: Set by user.
1922 * - decoding: unused
ebbcdc9a 1923 */
b1edfce0 1924 int scenechange_factor;
ebbcdc9a 1925
65f7062d 1926 /**
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1927 *
1928 * Note: Value depends upon the compare function used for fullpel ME.
f5bccd85 1929 * - encoding: Set by user.
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1930 * - decoding: unused
1931 */
b1edfce0 1932 int mv0_threshold;
115329f1 1933
1984f635 1934 /**
b1edfce0 1935 * Adjust sensitivity of b_frame_strategy 1.
f5bccd85 1936 * - encoding: Set by user.
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1937 * - decoding: unused
1938 */
b1edfce0 1939 int b_sensitivity;
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ZK
1940
1941 /**
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1942 * Chromaticity coordinates of the source primaries.
1943 * - encoding: Set by user
1944 * - decoding: Set by libavcodec
5cd62665 1945 */
b1edfce0 1946 enum AVColorPrimaries color_primaries;
115329f1 1947
3d2e8cce 1948 /**
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1949 * Color Transfer Characteristic.
1950 * - encoding: Set by user
1951 * - decoding: Set by libavcodec
3d2e8cce 1952 */
b1edfce0 1953 enum AVColorTransferCharacteristic color_trc;
115329f1 1954
11e659c2 1955 /**
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1956 * YUV colorspace type.
1957 * - encoding: Set by user
1958 * - decoding: Set by libavcodec
1959 */
1960 enum AVColorSpace colorspace;
1961
1962 /**
1963 * MPEG vs JPEG YUV range.
1964 * - encoding: Set by user
1965 * - decoding: Set by libavcodec
1966 */
1967 enum AVColorRange color_range;
1968
1969 /**
1970 * This defines the location of chroma samples.
1971 * - encoding: Set by user
1972 * - decoding: Set by libavcodec
1973 */
1974 enum AVChromaLocation chroma_sample_location;
1975
1976 /**
1977 * Number of slices.
1978 * Indicates number of picture subdivisions. Used for parallelized
1979 * decoding.
1980 * - encoding: Set by user
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1981 * - decoding: unused
1982 */
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1983 int slices;
1984
1985 /** Field order
1986 * - encoding: set by libavcodec
1987 * - decoding: Set by libavcodec
1988 */
1989 enum AVFieldOrder field_order;
1990
1991 /* audio only */
1992 int sample_rate; ///< samples per second
1993 int channels; ///< number of audio channels
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1994
1995 /**
b1edfce0 1996 * audio sample format
f5bccd85 1997 * - encoding: Set by user.
b1edfce0 1998 * - decoding: Set by libavcodec.
11e659c2 1999 */
b1edfce0 2000 enum AVSampleFormat sample_fmt; ///< sample format
115329f1 2001
b1edfce0 2002 /* The following data should not be initialized. */
3bb07d61 2003 /**
b1edfce0 2004 * Samples per packet, initialized when calling 'init'.
3bb07d61 2005 */
b1edfce0 2006 int frame_size;
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2007
2008 /**
2009 * Frame counter, set by libavcodec.
2010 *
2011 * - decoding: total number of frames returned from the decoder so far.
2012 * - encoding: total number of frames passed to the encoder so far.
2013 *
2014 * @note the counter is not incremented if encoding/decoding resulted in
2015 * an error.
2016 */
2017 int frame_number;
3bb07d61 2018
fb364ada 2019 /**
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2020 * number of bytes per packet if constant and known or 0
2021 * Used by some WAV based audio codecs.
fb364ada 2022 */
b1edfce0 2023 int block_align;
115329f1 2024
7d1c3fc1 2025 /**
b1edfce0 2026 * Audio cutoff bandwidth (0 means "automatic")
f5bccd85 2027 * - encoding: Set by user.
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2028 * - decoding: unused
2029 */
b1edfce0 2030 int cutoff;
d6eb3c50 2031
b1edfce0 2032#if FF_API_REQUEST_CHANNELS
d6eb3c50 2033 /**
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2034 * Decoder should decode to this many channels if it can (0 for default)
2035 * - encoding: unused
2036 * - decoding: Set by user.
2037 * @deprecated Deprecated in favor of request_channel_layout.
d6eb3c50 2038 */
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2039 int request_channels;
2040#endif
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MN
2041
2042 /**
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2043 * Audio channel layout.
2044 * - encoding: set by user.
2045 * - decoding: set by libavcodec.
d6eb3c50 2046 */
b1edfce0 2047 uint64_t channel_layout;
115329f1 2048
541ae140 2049 /**
b1edfce0 2050 * Request decoder to use this channel layout if it can (0 for default)
541ae140 2051 * - encoding: unused
b1edfce0 2052 * - decoding: Set by user.
541ae140 2053 */
b1edfce0 2054 uint64_t request_channel_layout;
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2055
2056 /**
b1edfce0 2057 * Type of service that the audio stream conveys.
f5bccd85 2058 * - encoding: Set by user.
b1edfce0 2059 * - decoding: Set by libavcodec.
05fbd0a2 2060 */
b1edfce0 2061 enum AVAudioServiceType audio_service_type;
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2062
2063 /**
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2064 * Used to request a sample format from the decoder.
2065 * - encoding: unused.
2066 * - decoding: Set by user.
158c7f05 2067 */
b1edfce0 2068 enum AVSampleFormat request_sample_fmt;
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2069
2070 /**
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2071 * Called at the beginning of each frame to get a buffer for it.
2072 *
2073 * The function will set AVFrame.data[], AVFrame.linesize[].
2074 * AVFrame.extended_data[] must also be set, but it should be the same as
2075 * AVFrame.data[] except for planar audio with more channels than can fit
2076 * in AVFrame.data[]. In that case, AVFrame.data[] shall still contain as
2077 * many data pointers as it can hold.
2078 *
2079 * if CODEC_CAP_DR1 is not set then get_buffer() must call
2080 * avcodec_default_get_buffer() instead of providing buffers allocated by
2081 * some other means.
2082 *
2083 * AVFrame.data[] should be 32- or 16-byte-aligned unless the CPU doesn't
2084 * need it. avcodec_default_get_buffer() aligns the output buffer properly,
2085 * but if get_buffer() is overridden then alignment considerations should
2086 * be taken into account.
2087 *
2088 * @see avcodec_default_get_buffer()
2089 *
2090 * Video:
2091 *
2092 * If pic.reference is set then the frame will be read later by libavcodec.
2093 * avcodec_align_dimensions2() should be used to find the required width and
2094 * height, as they normally need to be rounded up to the next multiple of 16.
2095 *
2096 * If frame multithreading is used and thread_safe_callbacks is set,
2097 * it may be called from a different thread, but not from more than one at
2098 * once. Does not need to be reentrant.
2099 *
2100 * @see release_buffer(), reget_buffer()
2101 * @see avcodec_align_dimensions2()
2102 *
2103 * Audio:
2104 *
2105 * Decoders request a buffer of a particular size by setting
2106 * AVFrame.nb_samples prior to calling get_buffer(). The decoder may,
2107 * however, utilize only part of the buffer by setting AVFrame.nb_samples
2108 * to a smaller value in the output frame.
2109 *
2110 * Decoders cannot use the buffer after returning from
2111 * avcodec_decode_audio4(), so they will not call release_buffer(), as it
2112 * is assumed to be released immediately upon return.
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.
158c7f05 2124 */
b1edfce0 2125 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
2a2bbcb0 2126
821cb11f 2127 /**
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2128 * Called to release buffers which were allocated with get_buffer.
2129 * A released buffer can be reused in get_buffer().
2130 * pic.data[*] must be set to NULL.
2131 * May be called from a different thread if frame multithreading is used,
2132 * but not by more than one thread at once, so does not need to be reentrant.
2133 * - encoding: unused
2134 * - decoding: Set by libavcodec, user can override.
821cb11f 2135 */
b1edfce0 2136 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
115329f1 2137
074c4ca7 2138 /**
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2139 * Called at the beginning of a frame to get cr buffer for it.
2140 * Buffer type (size, hints) must be the same. libavcodec won't check it.
2141 * libavcodec will pass previous buffer in pic, function should return
e1c2a5a0 2142 * same buffer or new buffer with old frame "painted" into it.
f5bccd85 2143 * If pic.data[0] == NULL must behave like get_buffer().
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2144 * if CODEC_CAP_DR1 is not set then reget_buffer() must call
2145 * avcodec_default_reget_buffer() instead of providing buffers allocated by
2146 * some other means.
074c4ca7 2147 * - encoding: unused
53128bc3 2148 * - decoding: Set by libavcodec, user can override.
074c4ca7 2149 */
e1c2a5a0 2150 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
ba58dabc 2151
ba58dabc 2152
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2153 /* - encoding parameters */
2154 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
2155 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
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2156
2157 /**
b1edfce0 2158 * minimum quantizer
f5bccd85 2159 * - encoding: Set by user.
b1edfce0 2160 * - decoding: unused
ba58dabc 2161 */
b1edfce0 2162 int qmin;
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2163
2164 /**
b1edfce0 2165 * maximum quantizer
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2166 * - encoding: Set by user.
2167 * - decoding: unused
7ebfc0ea 2168 */
b1edfce0 2169 int qmax;
115329f1 2170
77ea0d4b 2171 /**
b1edfce0 2172 * maximum quantizer difference between frames
f5bccd85 2173 * - encoding: Set by user.
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2174 * - decoding: unused
2175 */
b1edfce0 2176 int max_qdiff;
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2177
2178 /**
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2179 * ratecontrol qmin qmax limiting method
2180 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
f5bccd85 2181 * - encoding: Set by user.
b1edfce0 2182 * - decoding: unused
9c3d33d6 2183 */
b1edfce0 2184 float rc_qsquish;
115329f1 2185
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2186 float rc_qmod_amp;
2187 int rc_qmod_freq;
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2188
2189 /**
b1edfce0 2190 * decoder bitstream buffer size
f5bccd85 2191 * - encoding: Set by user.
f20f8a8b 2192 * - decoding: unused
a4d36c11 2193 */
b1edfce0 2194 int rc_buffer_size;
f20f8a8b
MN
2195
2196 /**
b1edfce0
AK
2197 * ratecontrol override, see RcOverride
2198 * - encoding: Allocated/set/freed by user.
f20f8a8b
MN
2199 * - decoding: unused
2200 */
b1edfce0
AK
2201 int rc_override_count;
2202 RcOverride *rc_override;
bf266e19
MN
2203
2204 /**
b1edfce0
AK
2205 * rate control equation
2206 * - encoding: Set by user
bf266e19
MN
2207 * - decoding: unused
2208 */
b1edfce0 2209 const char *rc_eq;
d4c5d2ad
MN
2210
2211 /**
b1edfce0 2212 * maximum bitrate
f5bccd85 2213 * - encoding: Set by user.
d4c5d2ad
MN
2214 * - decoding: unused
2215 */
b1edfce0 2216 int rc_max_rate;
baced9f5
MN
2217
2218 /**
b1edfce0 2219 * minimum bitrate
f5bccd85 2220 * - encoding: Set by user.
b1edfce0 2221 * - decoding: unused
baced9f5 2222 */
b1edfce0 2223 int rc_min_rate;
0215006a 2224
b1edfce0 2225 float rc_buffer_aggressivity;
c4ab43ff 2226
baced9f5 2227 /**
b1edfce0 2228 * initial complexity for pass1 ratecontrol
f5bccd85 2229 * - encoding: Set by user.
b1edfce0 2230 * - decoding: unused
178fcca8 2231 */
b1edfce0 2232 float rc_initial_cplx;
21adafec
MN
2233
2234 /**
b1edfce0
AK
2235 * Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow.
2236 * - encoding: Set by user.
2237 * - decoding: unused.
21adafec 2238 */
b1edfce0 2239 float rc_max_available_vbv_use;
bbf18b21
MN
2240
2241 /**
b1edfce0 2242 * Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow.
f5bccd85 2243 * - encoding: Set by user.
b1edfce0 2244 * - decoding: unused.
bbf18b21 2245 */
b1edfce0 2246 float rc_min_vbv_overflow_use;
bbf18b21
MN
2247
2248 /**
b1edfce0 2249 * Number of bits which should be loaded into the rc buffer before decoding starts.
f5bccd85 2250 * - encoding: Set by user.
bbf18b21
MN
2251 * - decoding: unused
2252 */
b1edfce0 2253 int rc_initial_buffer_occupancy;
0fd6aea1 2254
b1edfce0
AK
2255#define FF_CODER_TYPE_VLC 0
2256#define FF_CODER_TYPE_AC 1
2257#define FF_CODER_TYPE_RAW 2
2258#define FF_CODER_TYPE_RLE 3
2259#define FF_CODER_TYPE_DEFLATE 4
0fd6aea1 2260 /**
b1edfce0 2261 * coder type
f5bccd85 2262 * - encoding: Set by user.
0fd6aea1
MN
2263 * - decoding: unused
2264 */
b1edfce0 2265 int coder_type;
0fd6aea1
MN
2266
2267 /**
b1edfce0 2268 * context model
f5bccd85 2269 * - encoding: Set by user.
0fd6aea1
MN
2270 * - decoding: unused
2271 */
b1edfce0 2272 int context_model;
957c743a
CM
2273
2274 /**
b1edfce0 2275 * minimum Lagrange multipler
f5bccd85 2276 * - encoding: Set by user.
957c743a
CM
2277 * - decoding: unused
2278 */
b1edfce0 2279 int lmin;
6e0d8c06
MN
2280
2281 /**
b1edfce0 2282 * maximum Lagrange multipler
f5bccd85 2283 * - encoding: Set by user.
6e0d8c06
MN
2284 * - decoding: unused
2285 */
b1edfce0 2286 int lmax;
6e0d8c06
MN
2287
2288 /**
b1edfce0 2289 * frame skip threshold
f5bccd85 2290 * - encoding: Set by user.
6e0d8c06
MN
2291 * - decoding: unused
2292 */
b1edfce0 2293 int frame_skip_threshold;
09c3e44e
MN
2294
2295 /**
b1edfce0 2296 * frame skip factor
f5bccd85 2297 * - encoding: Set by user.
09c3e44e
MN
2298 * - decoding: unused
2299 */
b1edfce0 2300 int frame_skip_factor;
316a2ec8
MN
2301
2302 /**
b1edfce0 2303 * frame skip exponent
f5bccd85 2304 * - encoding: Set by user.
316a2ec8
MN
2305 * - decoding: unused
2306 */
b1edfce0 2307 int frame_skip_exp;
e8501c93
MN
2308
2309 /**
b1edfce0 2310 * frame skip comparison function
f5bccd85 2311 * - encoding: Set by user.
e8501c93
MN
2312 * - decoding: unused
2313 */
b1edfce0 2314 int frame_skip_cmp;
58f7833e 2315
58f7833e 2316 /**
b1edfce0 2317 * trellis RD quantization
f5bccd85 2318 * - encoding: Set by user.
58f7833e
RS
2319 * - decoding: unused
2320 */
b1edfce0 2321 int trellis;
58f7833e
RS
2322
2323 /**
f5bccd85 2324 * - encoding: Set by user.
b1edfce0 2325 * - decoding: unused
58f7833e 2326 */
b1edfce0 2327 int min_prediction_order;
58f7833e
RS
2328
2329 /**
f5bccd85 2330 * - encoding: Set by user.
58f7833e
RS
2331 * - decoding: unused
2332 */
b1edfce0 2333 int max_prediction_order;
58f7833e 2334
58f7833e 2335 /**
b1edfce0 2336 * GOP timecode frame start number, in non drop frame format
f5bccd85 2337 * - encoding: Set by user.
58f7833e
RS
2338 * - decoding: unused
2339 */
b1edfce0
AK
2340 int64_t timecode_frame_start;
2341
2342 /* The RTP callback: This function is called */
2343 /* every time the encoder has a packet to send. */
2344 /* It depends on the encoder if the data starts */
2345 /* with a Start Code (it should). H.263 does. */
2346 /* mb_nb contains the number of macroblocks */
2347 /* encoded in the RTP payload. */
2348 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
2349
2350 int rtp_payload_size; /* The size of the RTP payload: the coder will */
2351 /* do its best to deliver a chunk with size */
2352 /* below rtp_payload_size, the chunk will start */
2353 /* with a start code on some codecs like H.263. */
2354 /* This doesn't take account of any particular */
2355 /* headers inside the transmitted RTP payload. */
2356
2357 /* statistics, used for 2-pass encoding */
2358 int mv_bits;
2359 int header_bits;
2360 int i_tex_bits;
2361 int p_tex_bits;
2362 int i_count;
2363 int p_count;
2364 int skip_count;
2365 int misc_bits;
58f7833e 2366
14f0c8e2 2367 /**
b1edfce0
AK
2368 * number of bits used for the previously encoded frame
2369 * - encoding: Set by libavcodec.
14f0c8e2
LA
2370 * - decoding: unused
2371 */
b1edfce0 2372 int frame_bits;
39a64e30
CH
2373
2374 /**
b1edfce0
AK
2375 * pass1 encoding statistics output buffer
2376 * - encoding: Set by libavcodec.
39a64e30
CH
2377 * - decoding: unused
2378 */
b1edfce0 2379 char *stats_out;
1dd509b1
MN
2380
2381 /**
b1edfce0
AK
2382 * pass2 encoding statistics input buffer
2383 * Concatenated stuff from stats_out of pass1 should be placed here.
2384 * - encoding: Allocated/set/freed by user.
1dd509b1
MN
2385 * - decoding: unused
2386 */
b1edfce0 2387 char *stats_in;
f9243d34
CH
2388
2389 /**
b1edfce0
AK
2390 * Work around bugs in encoders which sometimes cannot be detected automatically.
2391 * - encoding: Set by user
2392 * - decoding: Set by user
f9243d34 2393 */
b1edfce0
AK
2394 int workaround_bugs;
2395#define FF_BUG_AUTODETECT 1 ///< autodetection
2396#define FF_BUG_OLD_MSMPEG4 2
2397#define FF_BUG_XVID_ILACE 4
2398#define FF_BUG_UMP4 8
2399#define FF_BUG_NO_PADDING 16
2400#define FF_BUG_AMV 32
2401#define FF_BUG_AC_VLC 0 ///< Will be removed, libavcodec can now handle these non-compliant files by default.
2402#define FF_BUG_QPEL_CHROMA 64
2403#define FF_BUG_STD_QPEL 128
2404#define FF_BUG_QPEL_CHROMA2 256
2405#define FF_BUG_DIRECT_BLOCKSIZE 512
2406#define FF_BUG_EDGE 1024
2407#define FF_BUG_HPEL_CHROMA 2048
2408#define FF_BUG_DC_CLIP 4096
2409#define FF_BUG_MS 8192 ///< Work around various bugs in Microsoft's broken decoders.
2410#define FF_BUG_TRUNCATED 16384
a403fc03
JR
2411
2412 /**
b1edfce0 2413 * strictly follow the standard (MPEG4, ...).
f5bccd85 2414 * - encoding: Set by user.
b1edfce0
AK
2415 * - decoding: Set by user.
2416 * Setting this to STRICT or higher means the encoder and decoder will
2417 * generally do stupid things, whereas setting it to unofficial or lower
2418 * will mean the encoder might produce output that is not supported by all
2419 * spec-compliant decoders. Decoders don't differentiate between normal,
2420 * unofficial and experimental (that is, they always try to decode things
2421 * when they can) unless they are explicitly asked to behave stupidly
2422 * (=strictly conform to the specs)
a403fc03 2423 */
b1edfce0
AK
2424 int strict_std_compliance;
2425#define FF_COMPLIANCE_VERY_STRICT 2 ///< Strictly conform to an older more strict version of the spec or reference software.
2426#define FF_COMPLIANCE_STRICT 1 ///< Strictly conform to all the things in the spec no matter what consequences.
2427#define FF_COMPLIANCE_NORMAL 0
2428#define FF_COMPLIANCE_UNOFFICIAL -1 ///< Allow unofficial extensions
2429#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
a403fc03 2430
a403fc03 2431 /**
b1edfce0
AK
2432 * error concealment flags
2433 * - encoding: unused
2434 * - decoding: Set by user.
a403fc03 2435 */
b1edfce0
AK
2436 int error_concealment;
2437#define FF_EC_GUESS_MVS 1
2438#define FF_EC_DEBLOCK 2
a403fc03
JR
2439
2440 /**
b1edfce0 2441 * debug
f5bccd85 2442 * - encoding: Set by user.
b1edfce0 2443 * - decoding: Set by user.
a403fc03 2444 */
b1edfce0
AK
2445 int debug;
2446#define FF_DEBUG_PICT_INFO 1
2447#define FF_DEBUG_RC 2
2448#define FF_DEBUG_BITSTREAM 4
2449#define FF_DEBUG_MB_TYPE 8
2450#define FF_DEBUG_QP 16
2451#define FF_DEBUG_MV 32
2452#define FF_DEBUG_DCT_COEFF 0x00000040
2453#define FF_DEBUG_SKIP 0x00000080
2454#define FF_DEBUG_STARTCODE 0x00000100
2455#define FF_DEBUG_PTS 0x00000200
2456#define FF_DEBUG_ER 0x00000400
2457#define FF_DEBUG_MMCO 0x00000800
2458#define FF_DEBUG_BUGS 0x00001000
2459#define FF_DEBUG_VIS_QP 0x00002000
2460#define FF_DEBUG_VIS_MB_TYPE 0x00004000
2461#define FF_DEBUG_BUFFERS 0x00008000
2462#define FF_DEBUG_THREADS 0x00010000
188dea1d 2463
80d617f5 2464 /**
b1edfce0 2465 * debug
f5bccd85 2466 * - encoding: Set by user.
b1edfce0 2467 * - decoding: Set by user.
80d617f5 2468 */
b1edfce0
AK
2469 int debug_mv;
2470#define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
2471#define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
2472#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
b1ec601f
RD
2473
2474 /**
b1edfce0 2475 * Error recognition; may misdetect some more or less valid parts as errors.
85947156
VS
2476 * - encoding: unused
2477 * - decoding: Set by user.
b1ec601f 2478 */
b1edfce0
AK
2479 int err_recognition;
2480#define AV_EF_CRCCHECK (1<<0)
2481#define AV_EF_BITSTREAM (1<<1)
2482#define AV_EF_BUFFER (1<<2)
2483#define AV_EF_EXPLODE (1<<3)
1408352a 2484
79de84f2
MN
2485 /**
2486 * opaque 64bit number (generally a PTS) that will be reordered and
2487 * output in AVFrame.reordered_opaque
81c623fa 2488 * @deprecated in favor of pkt_pts
79de84f2
MN
2489 * - encoding: unused
2490 * - decoding: Set by user.
2491 */
2492 int64_t reordered_opaque;
312420f3
PR
2493
2494 /**
b1edfce0
AK
2495 * Hardware accelerator in use
2496 * - encoding: unused.
2497 * - decoding: Set by libavcodec
312420f3 2498 */
b1edfce0 2499 struct AVHWAccel *hwaccel;
0d72e7d0
PR
2500
2501 /**
b1edfce0
AK
2502 * Hardware accelerator context.
2503 * For some hardware accelerators, a global context needs to be
2504 * provided by the user. In that case, this holds display-dependent
2505 * data Libav cannot instantiate itself. Please refer to the
2506 * Libav HW accelerator documentation to know how to fill this
2507 * is. e.g. for VA API, this is a struct vaapi_context.
2508 * - encoding: unused
2509 * - decoding: Set by user
0d72e7d0 2510 */
b1edfce0 2511 void *hwaccel_context;
0d72e7d0
PR
2512
2513 /**
b1edfce0
AK
2514 * error
2515 * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
2516 * - decoding: unused
0d72e7d0 2517 */
b1edfce0 2518 uint64_t error[AV_NUM_DATA_POINTERS];
3bff4d8b
BC
2519
2520 /**
b1edfce0 2521 * DCT algorithm, see FF_DCT_* below
3bff4d8b 2522 * - encoding: Set by user.
b1edfce0 2523 * - decoding: unused
3bff4d8b 2524 */
b1edfce0
AK
2525 int dct_algo;
2526#define FF_DCT_AUTO 0
2527#define FF_DCT_FASTINT 1
2528#define FF_DCT_INT 2
2529#define FF_DCT_MMX 3
2530#define FF_DCT_ALTIVEC 5
2531#define FF_DCT_FAAN 6
3bff4d8b
BC
2532
2533 /**
b1edfce0 2534 * IDCT algorithm, see FF_IDCT_* below.
3bff4d8b 2535 * - encoding: Set by user.
b1edfce0 2536 * - decoding: Set by user.
3bff4d8b 2537 */
b1edfce0
AK
2538 int idct_algo;
2539#define FF_IDCT_AUTO 0
2540#define FF_IDCT_INT 1
2541#define FF_IDCT_SIMPLE 2
2542#define FF_IDCT_SIMPLEMMX 3
2543#define FF_IDCT_LIBMPEG2MMX 4
2544#define FF_IDCT_MMI 5
2545#define FF_IDCT_ARM 7
2546#define FF_IDCT_ALTIVEC 8
2547#define FF_IDCT_SH4 9
2548#define FF_IDCT_SIMPLEARM 10
2549#define FF_IDCT_H264 11
2550#define FF_IDCT_VP3 12
2551#define FF_IDCT_IPP 13
2552#define FF_IDCT_XVIDMMX 14
2553#define FF_IDCT_CAVS 15
2554#define FF_IDCT_SIMPLEARMV5TE 16
2555#define FF_IDCT_SIMPLEARMV6 17
2556#define FF_IDCT_SIMPLEVIS 18
2557#define FF_IDCT_WMV2 19
2558#define FF_IDCT_FAAN 20
2559#define FF_IDCT_EA 21
2560#define FF_IDCT_SIMPLENEON 22
2561#define FF_IDCT_SIMPLEALPHA 23
2562#define FF_IDCT_BINK 24
40e5d31b 2563
95510be8 2564#if FF_API_DSP_MASK
40e5d31b 2565 /**
95510be8
MR
2566 * Unused.
2567 * @deprecated use av_set_cpu_flags_mask() instead.
40e5d31b 2568 */
95510be8
MR
2569 attribute_deprecated unsigned dsp_mask;
2570#endif
b1edfce0
AK
2571
2572 /**
2573 * bits per sample/pixel from the demuxer (needed for huffyuv).
2574 * - encoding: Set by libavcodec.
2575 * - decoding: Set by user.
2576 */
2577 int bits_per_coded_sample;
2578
2579 /**
2580 * Bits per sample/pixel of internal libavcodec pixel/sample format.
2581 * - encoding: set by user.
2582 * - decoding: set by libavcodec.
2583 */
2584 int bits_per_raw_sample;
3797c74b
MN
2585
2586 /**
b1edfce0
AK
2587 * low resolution decoding, 1-> 1/2 size, 2->1/4 size
2588 * - encoding: unused
2589 * - decoding: Set by user.
3797c74b 2590 */
2bcbd984 2591 attribute_deprecated int lowres;
1aea7018
GB
2592
2593 /**
b1edfce0
AK
2594 * the picture in the bitstream
2595 * - encoding: Set by libavcodec.
2596 * - decoding: Set by libavcodec.
1aea7018 2597 */
b1edfce0 2598 AVFrame *coded_frame;
4ee6a5c1
MN
2599
2600 /**
b1edfce0
AK
2601 * thread count
2602 * is used to decide how many independent tasks should be passed to execute()
2603 * - encoding: Set by user.
2604 * - decoding: Set by user.
4ee6a5c1 2605 */
b1edfce0 2606 int thread_count;
4ee6a5c1
MN
2607
2608 /**
b1edfce0
AK
2609 * Which multithreading methods to use.
2610 * Use of FF_THREAD_FRAME will increase decoding delay by one frame per thread,
2611 * so clients which cannot provide future frames should not use it.
2612 *
2613 * - encoding: Set by user, otherwise the default is used.
2614 * - decoding: Set by user, otherwise the default is used.
4ee6a5c1 2615 */
b1edfce0
AK
2616 int thread_type;
2617#define FF_THREAD_FRAME 1 ///< Decode more than one frame at once
2618#define FF_THREAD_SLICE 2 ///< Decode more than one part of a single frame at once
4ee6a5c1
MN
2619
2620 /**
b1edfce0
AK
2621 * Which multithreading methods are in use by the codec.
2622 * - encoding: Set by libavcodec.
2623 * - decoding: Set by libavcodec.
4ee6a5c1 2624 */
b1edfce0 2625 int active_thread_type;
4ee6a5c1
MN
2626
2627 /**
b1edfce0 2628 * Set by the client if its custom get_buffer() callback can be called
ad027866 2629 * synchronously from another thread, which allows faster multithreaded decoding.
b1edfce0
AK
2630 * draw_horiz_band() will be called from other threads regardless of this setting.
2631 * Ignored if the default get_buffer() is used.
2632 * - encoding: Set by user.
2633 * - decoding: Set by user.
4ee6a5c1 2634 */
b1edfce0 2635 int thread_safe_callbacks;
580a7465
DC
2636
2637 /**
b1edfce0
AK
2638 * The codec may call this to execute several independent things.
2639 * It will return only after finishing all tasks.
2640 * The user may replace this with some multithreaded implementation,
2641 * the default implementation will execute the parts serially.
2642 * @param count the number of things to execute
2643 * - encoding: Set by libavcodec, user can override.
2644 * - decoding: Set by libavcodec, user can override.
580a7465 2645 */
b1edfce0 2646 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size);
8d23a86f
RD
2647
2648 /**
2649 * The codec may call this to execute several independent things.
2650 * It will return only after finishing all tasks.
2651 * The user may replace this with some multithreaded implementation,
2652 * the default implementation will execute the parts serially.
2653 * Also see avcodec_thread_init and e.g. the --enable-pthread configure option.
2654 * @param c context passed also to func
2655 * @param count the number of things to execute
2656 * @param arg2 argument passed unchanged to func
2657 * @param ret return values of executed functions, must have space for "count" values. May be NULL.
2658 * @param func function that will be called count times, with jobnr from 0 to count-1.
2659 * threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no
2660 * two instances of func executing at the same time will have the same threadnr.
2661 * @return always 0 currently, but code should handle a future improvement where when any call to func
2662 * returns < 0 no further calls to func may be done and < 0 is returned.
2663 * - encoding: Set by libavcodec, user can override.
2664 * - decoding: Set by libavcodec, user can override.
2665 */
2666 int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count);
096c87f6 2667
b1edfce0
AK
2668 /**
2669 * thread opaque
2670 * Can be used by execute() to store some per AVCodecContext stuff.
2671 * - encoding: set by execute()
2672 * - decoding: set by execute()
2673 */
2674 void *thread_opaque;
23940f14 2675
2aa72ecc 2676 /**
b1edfce0
AK
2677 * noise vs. sse weight for the nsse comparsion function
2678 * - encoding: Set by user.
2aa72ecc
JZ
2679 * - decoding: unused
2680 */
b1edfce0 2681 int nsse_weight;
cb2c971d
AJ
2682
2683 /**
b1edfce0
AK
2684 * profile
2685 * - encoding: Set by user.
2686 * - decoding: Set by libavcodec.
cb2c971d 2687 */
b1edfce0
AK
2688 int profile;
2689#define FF_PROFILE_UNKNOWN -99
2690#define FF_PROFILE_RESERVED -100
2691
2692#define FF_PROFILE_AAC_MAIN 0
2693#define FF_PROFILE_AAC_LOW 1
2694#define FF_PROFILE_AAC_SSR 2
2695#define FF_PROFILE_AAC_LTP 3
2696
2697#define FF_PROFILE_DTS 20
2698#define FF_PROFILE_DTS_ES 30
2699#define FF_PROFILE_DTS_96_24 40
2700#define FF_PROFILE_DTS_HD_HRA 50
2701#define FF_PROFILE_DTS_HD_MA 60
2702
2703#define FF_PROFILE_MPEG2_422 0
2704#define FF_PROFILE_MPEG2_HIGH 1
2705#define FF_PROFILE_MPEG2_SS 2
2706#define FF_PROFILE_MPEG2_SNR_SCALABLE 3
2707#define FF_PROFILE_MPEG2_MAIN 4
2708#define FF_PROFILE_MPEG2_SIMPLE 5
2709
2710#define FF_PROFILE_H264_CONSTRAINED (1<<9) // 8+1; constraint_set1_flag
2711#define FF_PROFILE_H264_INTRA (1<<11) // 8+3; constraint_set3_flag
2712
2713#define FF_PROFILE_H264_BASELINE 66
2714#define FF_PROFILE_H264_CONSTRAINED_BASELINE (66|FF_PROFILE_H264_CONSTRAINED)
2715#define FF_PROFILE_H264_MAIN 77
2716#define FF_PROFILE_H264_EXTENDED 88
2717#define FF_PROFILE_H264_HIGH 100
2718#define FF_PROFILE_H264_HIGH_10 110
2719#define FF_PROFILE_H264_HIGH_10_INTRA (110|FF_PROFILE_H264_INTRA)
2720#define FF_PROFILE_H264_HIGH_422 122
2721#define FF_PROFILE_H264_HIGH_422_INTRA (122|FF_PROFILE_H264_INTRA)
2722#define FF_PROFILE_H264_HIGH_444 144
2723#define FF_PROFILE_H264_HIGH_444_PREDICTIVE 244
2724#define FF_PROFILE_H264_HIGH_444_INTRA (244|FF_PROFILE_H264_INTRA)
2725#define FF_PROFILE_H264_CAVLC_444 44
2726
2727#define FF_PROFILE_VC1_SIMPLE 0
2728#define FF_PROFILE_VC1_MAIN 1
2729#define FF_PROFILE_VC1_COMPLEX 2
2730#define FF_PROFILE_VC1_ADVANCED 3
2731
2732#define FF_PROFILE_MPEG4_SIMPLE 0
2733#define FF_PROFILE_MPEG4_SIMPLE_SCALABLE 1
2734#define FF_PROFILE_MPEG4_CORE 2
2735#define FF_PROFILE_MPEG4_MAIN 3
2736#define FF_PROFILE_MPEG4_N_BIT 4
2737#define FF_PROFILE_MPEG4_SCALABLE_TEXTURE 5
2738#define FF_PROFILE_MPEG4_SIMPLE_FACE_ANIMATION 6
2739#define FF_PROFILE_MPEG4_BASIC_ANIMATED_TEXTURE 7
2740#define FF_PROFILE_MPEG4_HYBRID 8
2741#define FF_PROFILE_MPEG4_ADVANCED_REAL_TIME 9
2742#define FF_PROFILE_MPEG4_CORE_SCALABLE 10
2743#define FF_PROFILE_MPEG4_ADVANCED_CODING 11
2744#define FF_PROFILE_MPEG4_ADVANCED_CORE 12
2745#define FF_PROFILE_MPEG4_ADVANCED_SCALABLE_TEXTURE 13
2746#define FF_PROFILE_MPEG4_SIMPLE_STUDIO 14
2747#define FF_PROFILE_MPEG4_ADVANCED_SIMPLE 15
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2748
2749 /**
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2750 * level
2751 * - encoding: Set by user.
2752 * - decoding: Set by libavcodec.
393cbb96 2753 */
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2754 int level;
2755#define FF_LEVEL_UNKNOWN -99
37b00b47 2756
37b00b47 2757 /**
37b00b47 2758 *
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2759 * - encoding: unused
2760 * - decoding: Set by user.
37b00b47 2761 */
b1edfce0 2762 enum AVDiscard skip_loop_filter;
37b00b47
AS
2763
2764 /**
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2765 *
2766 * - encoding: unused
2767 * - decoding: Set by user.
37b00b47 2768 */
b1edfce0 2769 enum AVDiscard skip_idct;
37b00b47
AS
2770
2771 /**
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2772 *
2773 * - encoding: unused
37b00b47
AS
2774 * - decoding: Set by user.
2775 */
b1edfce0 2776 enum AVDiscard skip_frame;
55bad0c6
CM
2777
2778 /**
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AK
2779 * Header containing style information for text subtitles.
2780 * For SUBTITLE_ASS subtitle type, it should contain the whole ASS
2781 * [Script Info] and [V4+ Styles] section, plus the [Events] line and
2782 * the Format line following. It shouldn't include any Dialogue line.
2783 * - encoding: Set/allocated/freed by user (before avcodec_open2())
2784 * - decoding: Set/allocated/freed by libavcodec (by avcodec_open2())
55bad0c6 2785 */
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2786 uint8_t *subtitle_header;
2787 int subtitle_header_size;
34b47d7c
JR
2788
2789 /**
b1edfce0 2790 * Simulates errors in the bitstream to test error concealment.
34b47d7c 2791 * - encoding: Set by user.
b1edfce0 2792 * - decoding: unused
64150ff0 2793 */
b1edfce0 2794 int error_rate;
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DB
2795
2796 /**
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2797 * Current packet as passed into the decoder, to avoid having
2798 * to pass the packet into every function. Currently only valid
2799 * inside lavc and get/release_buffer callbacks.
2800 * - decoding: set by avcodec_decode_*, read by get_buffer() for setting pkt_pts
582f2311 2801 * - encoding: unused
582f2311 2802 */
b1edfce0 2803 AVPacket *pkt;
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JR
2804
2805 /**
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2806 * VBV delay coded in the last frame (in periods of a 27 MHz clock).
2807 * Used for compliant TS muxing.
2808 * - encoding: Set by libavcodec.
2809 * - decoding: unused.
4bf3c8f2 2810 */
b1edfce0 2811 uint64_t vbv_delay;
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FB
2812} AVCodecContext;
2813
64863965 2814/**
060ec0a8
AH
2815 * AVProfile.
2816 */
2817typedef struct AVProfile {
2818 int profile;
2819 const char *name; ///< short name for the profile
2820} AVProfile;
2821
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2822typedef struct AVCodecDefault AVCodecDefault;
2823
060ec0a8 2824/**
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MN
2825 * AVCodec.
2826 */
de6d9b64 2827typedef struct AVCodec {
6b0cdb6e
NG
2828 /**
2829 * Name of the codec implementation.
2830 * The name is globally unique among encoders and among decoders (but an
2831 * encoder and a decoder can share the same name).
2832 * This is the primary way to find a codec from the user perspective.
2833 */
18f77016 2834 const char *name;
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2835 /**
2836 * Descriptive name for the codec, meant to be more human readable than name.
2837 * You should use the NULL_IF_CONFIG_SMALL() macro to define it.
2838 */
2839 const char *long_name;
72415b2a 2840 enum AVMediaType type;
9297ddd3 2841 enum CodecID id;
a2d11246
MN
2842 /**
2843 * Codec capabilities.
2844 * see CODEC_CAP_*
2845 */
bf89e6b1 2846 int capabilities;
716e31ea 2847 const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0}
1beb670a 2848 const enum PixelFormat *pix_fmts; ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1
3ade5d56 2849 const int *supported_samplerates; ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
5d6e4c16 2850 const enum AVSampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1
cc276c85 2851 const uint64_t *channel_layouts; ///< array of support channel layouts, or NULL if unknown. array is terminated by 0
2bcbd984 2852 attribute_deprecated uint8_t max_lowres; ///< maximum value for lowres supported by the decoder
567ad0e3 2853 const AVClass *priv_class; ///< AVClass for the private context
060ec0a8 2854 const AVProfile *profiles; ///< array of recognized profiles, or NULL if unknown, array is terminated by {FF_PROFILE_UNKNOWN}
37b00b47 2855
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2856 /*****************************************************************
2857 * No fields below this line are part of the public API. They
2858 * may not be used outside of libavcodec and can be changed and
2859 * removed at will.
2860 * New public fields should be added right above.
2861 *****************************************************************
2862 */
2863 int priv_data_size;
2864 struct AVCodec *next;
37b00b47 2865 /**
21a19b79 2866 * @name Frame-level threading support functions
37b00b47
AS
2867 * @{
2868 */
2869 /**
2870 * If defined, called on thread contexts when they are created.
2871 * If the codec allocates writable tables in init(), re-allocate them here.
2872 * priv_data will be set to a copy of the original.
2873 */
2874 int (*init_thread_copy)(AVCodecContext *);
2875 /**
2876 * Copy necessary context variables from a previous thread context to the current one.
2877 * If not defined, the next thread will start automatically; otherwise, the codec
2878 * must call ff_thread_finish_setup().
2879 *
2880 * dst and src will (rarely) point to the same context, in which case memcpy should be skipped.
2881 */
2882 int (*update_thread_context)(AVCodecContext *dst, const AVCodecContext *src);
2883 /** @} */
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2884
2885 /**
2886 * Private codec-specific defaults.
2887 */
2888 const AVCodecDefault *defaults;
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2889
2890 /**
2891 * Initialize codec static data, called from avcodec_register().
2892 */
2893 void (*init_static_data)(struct AVCodec *codec);
b2c75b6e 2894
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2895 int (*init)(AVCodecContext *);
2896 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
b2c75b6e
JR
2897 /**
2898 * Encode data to an AVPacket.
2899 *
2900 * @param avctx codec context
2901 * @param avpkt output AVPacket (may contain a user-provided buffer)
2902 * @param[in] frame AVFrame containing the raw data to be encoded
2903 * @param[out] got_packet_ptr encoder sets to 0 or 1 to indicate that a
2904 * non-empty packet was returned in avpkt.
2905 * @return 0 on success, negative error code on failure
2906 */
2907 int (*encode2)(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame,
2908 int *got_packet_ptr);
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2909 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt);
2910 int (*close)(AVCodecContext *);
2911 /**
2912 * Flush buffers.
2913 * Will be called when seeking
2914 */
2915 void (*flush)(AVCodecContext *);
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FB
2916} AVCodec;
2917
97d96aaa 2918/**
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GB
2919 * AVHWAccel.
2920 */
2921typedef struct AVHWAccel {
2922 /**
2923 * Name of the hardware accelerated codec.
2924 * The name is globally unique among encoders and among decoders (but an
2925 * encoder and a decoder can share the same name).
2926 */
2927 const char *name;
2928
2929 /**
2930 * Type of codec implemented by the hardware accelerator.
2931 *
72415b2a 2932 * See AVMEDIA_TYPE_xxx
40e5d31b 2933 */
72415b2a 2934 enum AVMediaType type;
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GB
2935
2936 /**
2937 * Codec implemented by the hardware accelerator.
2938 *
2939 * See CODEC_ID_xxx
2940 */
2941 enum CodecID id;
2942
2943 /**
2944 * Supported pixel format.
2945 *
2946 * Only hardware accelerated formats are supported here.
2947 */
2948 enum PixelFormat pix_fmt;
2949
2950 /**
2951 * Hardware accelerated codec capabilities.
2952 * see FF_HWACCEL_CODEC_CAP_*
2953 */
2954 int capabilities;
2955
2956 struct AVHWAccel *next;
2957
2958 /**
2959 * Called at the beginning of each frame or field picture.
2960 *
2961 * Meaningful frame information (codec specific) is guaranteed to
2962 * be parsed at this point. This function is mandatory.
2963 *
bf7e799c 2964 * Note that buf can be NULL along with buf_size set to 0.
40e5d31b
GB
2965 * Otherwise, this means the whole frame is available at this point.
2966 *
2967 * @param avctx the codec context
2968 * @param buf the frame data buffer base
2969 * @param buf_size the size of the frame in bytes
2970 * @return zero if successful, a negative value otherwise
2971 */
2972 int (*start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
2973
2974 /**
2975 * Callback for each slice.
2976 *
2977 * Meaningful slice information (codec specific) is guaranteed to
2978 * be parsed at this point. This function is mandatory.
2979 *
2980 * @param avctx the codec context
2981 * @param buf the slice data buffer base
2982 * @param buf_size the size of the slice in bytes
2983 * @return zero if successful, a negative value otherwise
2984 */
2985 int (*decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
2986
2987 /**
2988 * Called at the end of each frame or field picture.
2989 *
2990 * The whole picture is parsed at this point and can now be sent
2991 * to the hardware accelerator. This function is mandatory.
2992 *
2993 * @param avctx the codec context
2994 * @return zero if successful, a negative value otherwise
2995 */
2996 int (*end_frame)(AVCodecContext *avctx);
68e5d523
GB
2997
2998 /**
2999 * Size of HW accelerator private data.
3000 *
cd823ff9
GB
3001 * Private data is allocated with av_mallocz() before
3002 * AVCodecContext.get_buffer() and deallocated after
3003 * AVCodecContext.release_buffer().
68e5d523
GB
3004 */
3005 int priv_data_size;
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GB
3006} AVHWAccel;
3007
3008/**
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3009 * @defgroup lavc_picture AVPicture
3010 *
3011 * Functions for working with AVPicture
3012 * @{
3013 */
3014
3015/**
d7425f59
MN
3016 * four components are given, that's all.
3017 * the last component is alpha
3018 */
de6d9b64 3019typedef struct AVPicture {
560f773c
JR
3020 uint8_t *data[AV_NUM_DATA_POINTERS];
3021 int linesize[AV_NUM_DATA_POINTERS]; ///< number of bytes per line
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FB
3022} AVPicture;
3023
6aadfbda
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3024/**
3025 * @}
3026 */
3027
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3028#define AVPALETTE_SIZE 1024
3029#define AVPALETTE_COUNT 256
ba118447 3030
c66216ed
MN
3031enum AVSubtitleType {
3032 SUBTITLE_NONE,
3033
3034 SUBTITLE_BITMAP, ///< A bitmap, pict will be set
3035
3036 /**
3037 * Plain text, the text field must be set by the decoder and is
3038 * authoritative. ass and pict fields may contain approximations.
3039 */
3040 SUBTITLE_TEXT,
3041
3042 /**
3043 * Formatted text, the ass field must be set by the decoder and is
3044 * authoritative. pict and text fields may contain approximations.
3045 */
3046 SUBTITLE_ASS,
3047};
3048
c6ec28b1 3049typedef struct AVSubtitleRect {
ebc466bb
MN
3050 int x; ///< top left corner of pict, undefined when pict is not set
3051 int y; ///< top left corner of pict, undefined when pict is not set
3052 int w; ///< width of pict, undefined when pict is not set
3053 int h; ///< height of pict, undefined when pict is not set
3054 int nb_colors; ///< number of colors in pict, undefined when pict is not set
25b4c651
MN
3055
3056 /**
3057 * data+linesize for the bitmap of this subtitle.
3058 * can be set for text/ass as well once they where rendered
3059 */
3060 AVPicture pict;
f656106f
MN
3061 enum AVSubtitleType type;
3062
3063 char *text; ///< 0 terminated plain UTF-8 text
3064
3065 /**
3066 * 0 terminated ASS/SSA compatible event line.
3067 * The pressentation of this is unaffected by the other values in this
3068 * struct.
3069 */
3070 char *ass;
c6ec28b1
MN
3071} AVSubtitleRect;
3072
3073typedef struct AVSubtitle {
3074 uint16_t format; /* 0 = graphics */
3075 uint32_t start_display_time; /* relative to packet pts, in ms */
3076 uint32_t end_display_time; /* relative to packet pts, in ms */
ebc466bb 3077 unsigned num_rects;
db4fac64 3078 AVSubtitleRect **rects;
4bbe788a 3079 int64_t pts; ///< Same as packet pts, in AV_TIME_BASE
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FB
3080} AVSubtitle;
3081
294b3a50
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3082/**
3083 * If c is NULL, returns the first registered codec,
3084 * if c is non-NULL, returns the next registered codec after c,
3085 * or NULL if c is the last one.
3086 */
3087AVCodec *av_codec_next(AVCodec *c);
3088
3089/**
3090 * Return the LIBAVCODEC_VERSION_INT constant.
3091 */
3092unsigned avcodec_version(void);
3093
3094/**
3095 * Return the libavcodec build-time configuration.
3096 */
3097const char *avcodec_configuration(void);
3098
3099/**
3100 * Return the libavcodec license.
3101 */
3102const char *avcodec_license(void);
3103
3104/**
3105 * Register the codec codec and initialize libavcodec.
3106 *
3107 * @warning either this function or avcodec_register_all() must be called
3108 * before any other libavcodec functions.
3109 *
3110 * @see avcodec_register_all()
3111 */
3112void avcodec_register(AVCodec *codec);
3113
3114/**
3115 * Register all the codecs, parsers and bitstream filters which were enabled at
3116 * configuration time. If you do not call this function you can select exactly
3117 * which formats you want to support, by using the individual registration
3118 * functions.
3119 *
3120 * @see avcodec_register
3121 * @see av_register_codec_parser
3122 * @see av_register_bitstream_filter
3123 */
3124void avcodec_register_all(void);
3125
3126/**
3127 * Allocate an AVCodecContext and set its fields to default values. The
3128 * resulting struct can be deallocated by calling avcodec_close() on it followed
3129 * by av_free().
3130 *
3131 * @param codec if non-NULL, allocate private data and initialize defaults
3132 * for the given codec. It is illegal to then call avcodec_open2()
3133 * with a different codec.
3134 * If NULL, then the codec-specific defaults won't be initialized,
3135 * which may result in suboptimal default settings (this is
3136 * important mainly for encoders, e.g. libx264).
3137 *
3138 * @return An AVCodecContext filled with default values or NULL on failure.
3139 * @see avcodec_get_context_defaults
3140 */
3141AVCodecContext *avcodec_alloc_context3(AVCodec *codec);
3142
3143/**
3144 * Set the fields of the given AVCodecContext to default values corresponding
3145 * to the given codec (defaults may be codec-dependent).
3146 *
3147 * Do not call this function if a non-NULL codec has been passed
3148 * to avcodec_alloc_context3() that allocated this AVCodecContext.
3149 * If codec is non-NULL, it is illegal to call avcodec_open2() with a
3150 * different codec on this AVCodecContext.
3151 */
3152int avcodec_get_context_defaults3(AVCodecContext *s, AVCodec *codec);
3153
3154/**
3155 * Get the AVClass for AVCodecContext. It can be used in combination with
3156 * AV_OPT_SEARCH_FAKE_OBJ for examining options.
3157 *
3158 * @see av_opt_find().
3159 */
3160const AVClass *avcodec_get_class(void);
3161
3162/**
3163 * Copy the settings of the source AVCodecContext into the destination
3164 * AVCodecContext. The resulting destination codec context will be
3165 * unopened, i.e. you are required to call avcodec_open2() before you
3166 * can use this AVCodecContext to decode/encode video/audio data.
3167 *
3168 * @param dest target codec context, should be initialized with
3169 * avcodec_alloc_context3(), but otherwise uninitialized
3170 * @param src source codec context
3171 * @return AVERROR() on error (e.g. memory allocation error), 0 on success
3172 */
3173int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src);
3174
3175/**
3176 * Allocate an AVFrame and set its fields to default values. The resulting
3177 * struct can be deallocated by simply calling av_free().
3178 *
3179 * @return An AVFrame filled with default values or NULL on failure.
3180 * @see avcodec_get_frame_defaults
3181 */
3182AVFrame *avcodec_alloc_frame(void);
3183
3184/**
3185 * Set the fields of the given AVFrame to default values.
3186 *
3187 * @param pic The AVFrame of which the fields should be set to default values.
3188 */
3189void avcodec_get_frame_defaults(AVFrame *pic);
3190
3191/**
3192 * Initialize the AVCodecContext to use the given AVCodec. Prior to using this
3193 * function the context has to be allocated with avcodec_alloc_context3().
3194 *
3195 * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
3196 * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
3197 * retrieving a codec.
3198 *
3199 * @warning This function is not thread safe!
3200 *
3201 * @code
3202 * avcodec_register_all();
3203 * av_dict_set(&opts, "b", "2.5M", 0);
3204 * codec = avcodec_find_decoder(CODEC_ID_H264);
3205 * if (!codec)
3206 * exit(1);
3207 *
3208 * context = avcodec_alloc_context3(codec);
3209 *
3210 * if (avcodec_open2(context, codec, opts) < 0)
3211 * exit(1);
3212 * @endcode
3213 *
3214 * @param avctx The context to initialize.
3215 * @param codec The codec to open this context for. If a non-NULL codec has been
3216 * previously passed to avcodec_alloc_context3() or
3217 * avcodec_get_context_defaults3() for this context, then this
3218 * parameter MUST be either NULL or equal to the previously passed
3219 * codec.
3220 * @param options A dictionary filled with AVCodecContext and codec-private options.
3221 * On return this object will be filled with options that were not found.
3222 *
3223 * @return zero on success, a negative value on error
3224 * @see avcodec_alloc_context3(), avcodec_find_decoder(), avcodec_find_encoder(),
3225 * av_dict_set(), av_opt_find().
3226 */
3227int avcodec_open2(AVCodecContext *avctx, AVCodec *codec, AVDictionary **options);
3228
3229/**
3230 * Close a given AVCodecContext and free all the data associated with it
3231 * (but not the AVCodecContext itself).
3232 *
3233 * Calling this function on an AVCodecContext that hasn't been opened will free
3234 * the codec-specific data allocated in avcodec_alloc_context3() /
3235 * avcodec_get_context_defaults3() with a non-NULL codec. Subsequent calls will
3236 * do nothing.
3237 */
3238int avcodec_close(AVCodecContext *avctx);