configure: in check_ld, place new -l flags before existing ones
[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"
de6d9b64 33
3dd851c4 34#include "libavcodec/version.h"
eda7c983 35
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36#if LIBAVCODEC_VERSION_MAJOR < 53
37# define FF_INTERNALC_MEM_TYPE unsigned int
38#else
39# define FF_INTERNALC_MEM_TYPE size_t
40#endif
41
7ebf5927 42/**
48966b02 43 * Identify the syntax and semantics of the bitstream.
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44 * The principle is roughly:
45 * Two decoders with the same ID can decode the same streams.
46 * Two encoders with the same ID can encode compatible streams.
47 * There may be slight deviations from the principle due to implementation
48 * details.
7ebf5927 49 *
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50 * If you add a codec ID to this list, add it so that
51 * 1. no value of a existing codec ID changes (that would break ABI),
52 * 2. it is as close as possible to similar codecs.
7ebf5927 53 */
de6d9b64 54enum CodecID {
115329f1 55 CODEC_ID_NONE,
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56
57 /* video codecs */
de6d9b64 58 CODEC_ID_MPEG1VIDEO,
0e373b95 59 CODEC_ID_MPEG2VIDEO, ///< preferred ID for MPEG-1/2 video decoding
fb364ada 60 CODEC_ID_MPEG2VIDEO_XVMC,
c6148de2 61 CODEC_ID_H261,
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62 CODEC_ID_H263,
63 CODEC_ID_RV10,
68b94c35 64 CODEC_ID_RV20,
de6d9b64 65 CODEC_ID_MJPEG,
b135d9fb 66 CODEC_ID_MJPEGB,
b1e6b355 67 CODEC_ID_LJPEG,
5e83dec4 68 CODEC_ID_SP5X,
5639729b 69 CODEC_ID_JPEGLS,
bf89e6b1 70 CODEC_ID_MPEG4,
de6d9b64 71 CODEC_ID_RAWVIDEO,
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72 CODEC_ID_MSMPEG4V1,
73 CODEC_ID_MSMPEG4V2,
74 CODEC_ID_MSMPEG4V3,
e1a9dbff 75 CODEC_ID_WMV1,
b50eef3a 76 CODEC_ID_WMV2,
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77 CODEC_ID_H263P,
78 CODEC_ID_H263I,
d4f5d74a 79 CODEC_ID_FLV1,
be8ffec9 80 CODEC_ID_SVQ1,
8b82a956 81 CODEC_ID_SVQ3,
020fcc94 82 CODEC_ID_DVVIDEO,
11f18faf 83 CODEC_ID_HUFFYUV,
f70f7c6d 84 CODEC_ID_CYUV,
0da71265 85 CODEC_ID_H264,
deabd4fd 86 CODEC_ID_INDEO3,
d86053a4 87 CODEC_ID_VP3,
f44ee2c3 88 CODEC_ID_THEORA,
3d2e8cce 89 CODEC_ID_ASV1,
9b56edf5 90 CODEC_ID_ASV2,
5e20f836 91 CODEC_ID_FFV1,
e2a7bb28 92 CODEC_ID_4XM,
be3564ed 93 CODEC_ID_VCR1,
3aff069b 94 CODEC_ID_CLJR,
c3bf0288 95 CODEC_ID_MDEC,
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96 CODEC_ID_ROQ,
97 CODEC_ID_INTERPLAY_VIDEO,
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98 CODEC_ID_XAN_WC3,
99 CODEC_ID_XAN_WC4,
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100 CODEC_ID_RPZA,
101 CODEC_ID_CINEPAK,
102 CODEC_ID_WS_VQA,
103 CODEC_ID_MSRLE,
104 CODEC_ID_MSVIDEO1,
4120a53a 105 CODEC_ID_IDCIN,
1dc1ed99 106 CODEC_ID_8BPS,
11e29a41 107 CODEC_ID_SMC,
42cad81a 108 CODEC_ID_FLIC,
9a4117d5 109 CODEC_ID_TRUEMOTION1,
fafa0b75 110 CODEC_ID_VMDVIDEO,
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111 CODEC_ID_MSZH,
112 CODEC_ID_ZLIB,
070ed1bc 113 CODEC_ID_QTRLE,
791e7b83 114 CODEC_ID_SNOW,
9d53d58e 115 CODEC_ID_TSCC,
d0a0bbd2 116 CODEC_ID_ULTI,
d08d7142 117 CODEC_ID_QDRAW,
ab711b3c 118 CODEC_ID_VIXL,
acfd8f0f 119 CODEC_ID_QPEG,
382b5b3a 120#if LIBAVCODEC_VERSION_MAJOR < 53
17179d2d 121 CODEC_ID_XVID,
382b5b3a 122#endif
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123 CODEC_ID_PNG,
124 CODEC_ID_PPM,
125 CODEC_ID_PBM,
126 CODEC_ID_PGM,
127 CODEC_ID_PGMYUV,
128 CODEC_ID_PAM,
f37b9768 129 CODEC_ID_FFVHUFF,
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130 CODEC_ID_RV30,
131 CODEC_ID_RV40,
10b9c374 132 CODEC_ID_VC1,
21aa398f 133 CODEC_ID_WMV3,
9c7fb608 134 CODEC_ID_LOCO,
a8a15e9d 135 CODEC_ID_WNV1,
589f8220 136 CODEC_ID_AASC,
856dbbff 137 CODEC_ID_INDEO2,
b81f8949 138 CODEC_ID_FRAPS,
64af6168 139 CODEC_ID_TRUEMOTION2,
9fa62f2a 140 CODEC_ID_BMP,
e0f80bd7 141 CODEC_ID_CSCD,
4e114829 142 CODEC_ID_MMVIDEO,
9c8d8e84 143 CODEC_ID_ZMBV,
26376701 144 CODEC_ID_AVS,
348efc18 145 CODEC_ID_SMACKVIDEO,
dfca23e3 146 CODEC_ID_NUV,
fd7b1991 147 CODEC_ID_KMVC,
0919e788 148 CODEC_ID_FLASHSV,
20ffddb9 149 CODEC_ID_CAVS,
f31065f6 150 CODEC_ID_JPEG2000,
eb57c889 151 CODEC_ID_VMNC,
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152 CODEC_ID_VP5,
153 CODEC_ID_VP6,
154 CODEC_ID_VP6F,
3689cf16 155 CODEC_ID_TARGA,
72450e50 156 CODEC_ID_DSICINVIDEO,
29f86228 157 CODEC_ID_TIERTEXSEQVIDEO,
a991b1fe 158 CODEC_ID_TIFF,
06d392a7 159 CODEC_ID_GIF,
3edeab82 160 CODEC_ID_FFH264,
33a0dd37 161 CODEC_ID_DXA,
52b6bad2 162 CODEC_ID_DNXHD,
efb0c399 163 CODEC_ID_THP,
2d99eed1 164 CODEC_ID_SGI,
9a0ddd09 165 CODEC_ID_C93,
1e6c6759 166 CODEC_ID_BETHSOFTVID,
b46d68c6 167 CODEC_ID_PTX,
1ca779e7 168 CODEC_ID_TXD,
91fc2cf1 169 CODEC_ID_VP6A,
8787d837 170 CODEC_ID_AMV,
66f7679c 171 CODEC_ID_VB,
b4abe1d1 172 CODEC_ID_PCX,
d43df959 173 CODEC_ID_SUNRAST,
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174 CODEC_ID_INDEO4,
175 CODEC_ID_INDEO5,
a7129de5 176 CODEC_ID_MIMIC,
975cdc8f 177 CODEC_ID_RL2,
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178 CODEC_ID_8SVX_EXP,
179 CODEC_ID_8SVX_FIB,
40d26273 180 CODEC_ID_ESCAPE124,
782a58ec 181 CODEC_ID_DIRAC,
b64c096b 182 CODEC_ID_BFI,
495900f7 183 CODEC_ID_CMV,
974e0eee 184 CODEC_ID_MOTIONPIXELS,
cfc78718 185 CODEC_ID_TGV,
42b30357 186 CODEC_ID_TGQ,
d8964f3a 187 CODEC_ID_TQI,
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188 CODEC_ID_AURA,
189 CODEC_ID_AURA2,
97f92143 190 CODEC_ID_V210X,
a1fd2bc3 191 CODEC_ID_TMV,
ca0bb1c4 192 CODEC_ID_V210,
94d3d6a4 193 CODEC_ID_DPX,
c63ea92b 194 CODEC_ID_MAD,
d8b35b85 195 CODEC_ID_FRWU,
0aa6a518 196 CODEC_ID_FLASHSV2,
a3d995c1 197 CODEC_ID_CDGRAPHICS,
4aaab0a3 198 CODEC_ID_R210,
a1ae40fd 199 CODEC_ID_ANM,
4e5f42dd 200 CODEC_ID_BINKVIDEO,
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201 CODEC_ID_IFF_ILBM,
202 CODEC_ID_IFF_BYTERUN1,
bf354122 203 CODEC_ID_KGV1,
148bcae9 204 CODEC_ID_YOP,
a98c2dfa 205 CODEC_ID_VP8,
a526d619 206 CODEC_ID_PICTOR,
beaa963c 207 CODEC_ID_ANSI,
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208 CODEC_ID_A64_MULTI,
209 CODEC_ID_A64_MULTI5,
43836928 210 CODEC_ID_R10K,
9d09ebf1 211 CODEC_ID_MXPEG,
d267b339 212 CODEC_ID_LAGARITH,
f5b82f45 213 CODEC_ID_PRORES,
0697440c 214 CODEC_ID_JV,
40c5ee99 215
f5bccd85 216 /* various PCM "codecs" */
17179d2d 217 CODEC_ID_PCM_S16LE= 0x10000,
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218 CODEC_ID_PCM_S16BE,
219 CODEC_ID_PCM_U16LE,
220 CODEC_ID_PCM_U16BE,
221 CODEC_ID_PCM_S8,
222 CODEC_ID_PCM_U8,
223 CODEC_ID_PCM_MULAW,
224 CODEC_ID_PCM_ALAW,
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225 CODEC_ID_PCM_S32LE,
226 CODEC_ID_PCM_S32BE,
227 CODEC_ID_PCM_U32LE,
228 CODEC_ID_PCM_U32BE,
229 CODEC_ID_PCM_S24LE,
230 CODEC_ID_PCM_S24BE,
231 CODEC_ID_PCM_U24LE,
232 CODEC_ID_PCM_U24BE,
233 CODEC_ID_PCM_S24DAUD,
a11c2a2c 234 CODEC_ID_PCM_ZORK,
725d86bf 235 CODEC_ID_PCM_S16LE_PLANAR,
1472b7dd 236 CODEC_ID_PCM_DVD,
aa29709e 237 CODEC_ID_PCM_F32BE,
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238 CODEC_ID_PCM_F32LE,
239 CODEC_ID_PCM_F64BE,
240 CODEC_ID_PCM_F64LE,
5dd3707b 241 CODEC_ID_PCM_BLURAY,
fbeabfca 242 CODEC_ID_PCM_LXF,
0147f198 243
f5bccd85 244 /* various ADPCM codecs */
17179d2d 245 CODEC_ID_ADPCM_IMA_QT= 0x11000,
0147f198 246 CODEC_ID_ADPCM_IMA_WAV,
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247 CODEC_ID_ADPCM_IMA_DK3,
248 CODEC_ID_ADPCM_IMA_DK4,
2fdf638b 249 CODEC_ID_ADPCM_IMA_WS,
7d8379f2 250 CODEC_ID_ADPCM_IMA_SMJPEG,
0147f198 251 CODEC_ID_ADPCM_MS,
e2a7bb28 252 CODEC_ID_ADPCM_4XM,
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253 CODEC_ID_ADPCM_XA,
254 CODEC_ID_ADPCM_ADX,
7d8379f2 255 CODEC_ID_ADPCM_EA,
e5966052 256 CODEC_ID_ADPCM_G726,
b3bfb299 257 CODEC_ID_ADPCM_CT,
659c3692 258 CODEC_ID_ADPCM_SWF,
2ff4524e 259 CODEC_ID_ADPCM_YAMAHA,
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260 CODEC_ID_ADPCM_SBPRO_4,
261 CODEC_ID_ADPCM_SBPRO_3,
262 CODEC_ID_ADPCM_SBPRO_2,
d1e0d21f 263 CODEC_ID_ADPCM_THP,
3a7f5d07 264 CODEC_ID_ADPCM_IMA_AMV,
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265 CODEC_ID_ADPCM_EA_R1,
266 CODEC_ID_ADPCM_EA_R3,
267 CODEC_ID_ADPCM_EA_R2,
7bb65d89 268 CODEC_ID_ADPCM_IMA_EA_SEAD,
fac84d3c 269 CODEC_ID_ADPCM_IMA_EA_EACS,
271b4095 270 CODEC_ID_ADPCM_EA_XAS,
861c63a2 271 CODEC_ID_ADPCM_EA_MAXIS_XA,
055dc116 272 CODEC_ID_ADPCM_IMA_ISS,
58e37eaf 273 CODEC_ID_ADPCM_G722,
891f64b3 274
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275 /* AMR */
276 CODEC_ID_AMR_NB= 0x12000,
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277 CODEC_ID_AMR_WB,
278
b8414bbd 279 /* RealAudio codecs*/
17179d2d 280 CODEC_ID_RA_144= 0x13000,
b8414bbd 281 CODEC_ID_RA_288,
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282
283 /* various DPCM codecs */
17179d2d 284 CODEC_ID_ROQ_DPCM= 0x14000,
3ef8be2b 285 CODEC_ID_INTERPLAY_DPCM,
9937e686 286 CODEC_ID_XAN_DPCM,
d08d7142 287 CODEC_ID_SOL_DPCM,
115329f1 288
ba0dabbf 289 /* audio codecs */
17179d2d 290 CODEC_ID_MP2= 0x15000,
0e373b95 291 CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3
17179d2d 292 CODEC_ID_AAC,
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293 CODEC_ID_AC3,
294 CODEC_ID_DTS,
295 CODEC_ID_VORBIS,
296 CODEC_ID_DVAUDIO,
297 CODEC_ID_WMAV1,
298 CODEC_ID_WMAV2,
299 CODEC_ID_MACE3,
300 CODEC_ID_MACE6,
301 CODEC_ID_VMDAUDIO,
302 CODEC_ID_SONIC,
303 CODEC_ID_SONIC_LS,
ac2570a8 304 CODEC_ID_FLAC,
1ede228a 305 CODEC_ID_MP3ADU,
d2a7718d 306 CODEC_ID_MP3ON4,
85ad5695 307 CODEC_ID_SHORTEN,
5df8a0c6 308 CODEC_ID_ALAC,
034eeaa1 309 CODEC_ID_WESTWOOD_SND1,
0e373b95 310 CODEC_ID_GSM, ///< as in Berlin toast format
d9b1c197 311 CODEC_ID_QDM2,
e0f7e329 312 CODEC_ID_COOK,
bf3027c8 313 CODEC_ID_TRUESPEECH,
a24c4a2a 314 CODEC_ID_TTA,
348efc18 315 CODEC_ID_SMACKAUDIO,
6c496518 316 CODEC_ID_QCELP,
730581f3 317 CODEC_ID_WAVPACK,
72450e50 318 CODEC_ID_DSICINAUDIO,
84ed36da 319 CODEC_ID_IMC,
185c7b6b 320 CODEC_ID_MUSEPACK7,
aad512b4 321 CODEC_ID_MLP,
f5bccd85 322 CODEC_ID_GSM_MS, /* as found in WAV */
10e26bc7 323 CODEC_ID_ATRAC3,
8950f828 324 CODEC_ID_VOXWARE,
bf4a1f17 325 CODEC_ID_APE,
636b13c5 326 CODEC_ID_NELLYMOSER,
12877faf 327 CODEC_ID_MUSEPACK8,
cb4ddf77 328 CODEC_ID_SPEEX,
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329 CODEC_ID_WMAVOICE,
330 CODEC_ID_WMAPRO,
800b9c24 331 CODEC_ID_WMALOSSLESS,
b339f0c6 332 CODEC_ID_ATRAC3P,
2988c93d 333 CODEC_ID_EAC3,
faeedbbb 334 CODEC_ID_SIPR,
7f507b2d 335 CODEC_ID_MP1,
616e899c 336 CODEC_ID_TWINVQ,
9ba4821d 337 CODEC_ID_TRUEHD,
b24bbbb4 338 CODEC_ID_MP4ALS,
223e8df1 339 CODEC_ID_ATRAC1,
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340 CODEC_ID_BINKAUDIO_RDFT,
341 CODEC_ID_BINKAUDIO_DCT,
136e19e1 342 CODEC_ID_AAC_LATM,
ed19fafd 343 CODEC_ID_QDMC,
115329f1 344
240c1657 345 /* subtitle codecs */
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346 CODEC_ID_DVD_SUBTITLE= 0x17000,
347 CODEC_ID_DVB_SUBTITLE,
0e373b95 348 CODEC_ID_TEXT, ///< raw UTF-8 text
7e2643ae 349 CODEC_ID_XSUB,
f9a9b350 350 CODEC_ID_SSA,
cc8c2c6a 351 CODEC_ID_MOV_TEXT,
c58b82a2 352 CODEC_ID_HDMV_PGS_SUBTITLE,
e58992e4 353 CODEC_ID_DVB_TELETEXT,
ba2c508d 354 CODEC_ID_SRT,
115329f1 355
7ce68923 356 /* other specific kind of codecs (generally used for attachments) */
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357 CODEC_ID_TTF= 0x18000,
358
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359 CODEC_ID_PROBE= 0x19000, ///< codec_id is not known (like CODEC_ID_NONE) but lavf should attempt to identify it
360
0e373b95 361 CODEC_ID_MPEG2TS= 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS
f5bccd85 362 * stream (only used by libavformat) */
fd5b124d 363 CODEC_ID_FFMETADATA=0x21000, ///< Dummy codec for streams containing only metadata information.
de6d9b64 364};
dcedf586 365
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366#if LIBAVCODEC_VERSION_MAJOR < 53
367#define CodecType AVMediaType
368
369#define CODEC_TYPE_UNKNOWN AVMEDIA_TYPE_UNKNOWN
370#define CODEC_TYPE_VIDEO AVMEDIA_TYPE_VIDEO
371#define CODEC_TYPE_AUDIO AVMEDIA_TYPE_AUDIO
372#define CODEC_TYPE_DATA AVMEDIA_TYPE_DATA
373#define CODEC_TYPE_SUBTITLE AVMEDIA_TYPE_SUBTITLE
374#define CODEC_TYPE_ATTACHMENT AVMEDIA_TYPE_ATTACHMENT
375#define CODEC_TYPE_NB AVMEDIA_TYPE_NB
376#endif
377
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378#if FF_API_OLD_SAMPLE_FMT
379#define SampleFormat AVSampleFormat
380
381#define SAMPLE_FMT_NONE AV_SAMPLE_FMT_NONE
382#define SAMPLE_FMT_U8 AV_SAMPLE_FMT_U8
383#define SAMPLE_FMT_S16 AV_SAMPLE_FMT_S16
384#define SAMPLE_FMT_S32 AV_SAMPLE_FMT_S32
385#define SAMPLE_FMT_FLT AV_SAMPLE_FMT_FLT
386#define SAMPLE_FMT_DBL AV_SAMPLE_FMT_DBL
387#define SAMPLE_FMT_NB AV_SAMPLE_FMT_NB
388#endif
a96b68b7 389
176a6157 390#if FF_API_OLD_AUDIOCONVERT
737eb597 391#include "libavutil/audioconvert.h"
176a6157 392
0d72e7d0 393/* Audio channel masks */
176a6157
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394#define CH_FRONT_LEFT AV_CH_FRONT_LEFT
395#define CH_FRONT_RIGHT AV_CH_FRONT_RIGHT
396#define CH_FRONT_CENTER AV_CH_FRONT_CENTER
397#define CH_LOW_FREQUENCY AV_CH_LOW_FREQUENCY
398#define CH_BACK_LEFT AV_CH_BACK_LEFT
399#define CH_BACK_RIGHT AV_CH_BACK_RIGHT
400#define CH_FRONT_LEFT_OF_CENTER AV_CH_FRONT_LEFT_OF_CENTER
401#define CH_FRONT_RIGHT_OF_CENTER AV_CH_FRONT_RIGHT_OF_CENTER
402#define CH_BACK_CENTER AV_CH_BACK_CENTER
403#define CH_SIDE_LEFT AV_CH_SIDE_LEFT
404#define CH_SIDE_RIGHT AV_CH_SIDE_RIGHT
405#define CH_TOP_CENTER AV_CH_TOP_CENTER
406#define CH_TOP_FRONT_LEFT AV_CH_TOP_FRONT_LEFT
407#define CH_TOP_FRONT_CENTER AV_CH_TOP_FRONT_CENTER
408#define CH_TOP_FRONT_RIGHT AV_CH_TOP_FRONT_RIGHT
409#define CH_TOP_BACK_LEFT AV_CH_TOP_BACK_LEFT
410#define CH_TOP_BACK_CENTER AV_CH_TOP_BACK_CENTER
411#define CH_TOP_BACK_RIGHT AV_CH_TOP_BACK_RIGHT
412#define CH_STEREO_LEFT AV_CH_STEREO_LEFT
413#define CH_STEREO_RIGHT AV_CH_STEREO_RIGHT
0d72e7d0 414
31557166
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415/** Channel mask value used for AVCodecContext.request_channel_layout
416 to indicate that the user requests the channel order of the decoder output
417 to be the native codec channel order. */
176a6157 418#define CH_LAYOUT_NATIVE AV_CH_LAYOUT_NATIVE
31557166 419
0d72e7d0 420/* Audio channel convenience macros */
176a6157
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421#define CH_LAYOUT_MONO AV_CH_LAYOUT_MONO
422#define CH_LAYOUT_STEREO AV_CH_LAYOUT_STEREO
423#define CH_LAYOUT_2_1 AV_CH_LAYOUT_2_1
424#define CH_LAYOUT_SURROUND AV_CH_LAYOUT_SURROUND
425#define CH_LAYOUT_4POINT0 AV_CH_LAYOUT_4POINT0
426#define CH_LAYOUT_2_2 AV_CH_LAYOUT_2_2
427#define CH_LAYOUT_QUAD AV_CH_LAYOUT_QUAD
428#define CH_LAYOUT_5POINT0 AV_CH_LAYOUT_5POINT0
429#define CH_LAYOUT_5POINT1 AV_CH_LAYOUT_5POINT1
430#define CH_LAYOUT_5POINT0_BACK AV_CH_LAYOUT_5POINT0_BACK
431#define CH_LAYOUT_5POINT1_BACK AV_CH_LAYOUT_5POINT1_BACK
432#define CH_LAYOUT_7POINT0 AV_CH_LAYOUT_7POINT0
433#define CH_LAYOUT_7POINT1 AV_CH_LAYOUT_7POINT1
434#define CH_LAYOUT_7POINT1_WIDE AV_CH_LAYOUT_7POINT1_WIDE
435#define CH_LAYOUT_STEREO_DOWNMIX AV_CH_LAYOUT_STEREO_DOWNMIX
436#endif
0d72e7d0 437
de6d9b64 438/* in bytes */
8170e5fb 439#define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
de6d9b64 440
d7425f59 441/**
cf713bb8 442 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
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443 * This is mainly needed because some optimized bitstream readers read
444 * 32 or 64 bit at once and could read over the end.<br>
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445 * Note: If the first 23 bits of the additional bytes are not 0, then damaged
446 * MPEG bitstreams could cause overread and segfault.
d7425f59 447 */
171b7b91 448#define FF_INPUT_BUFFER_PADDING_SIZE 8
d7425f59 449
0ecca7a4 450/**
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451 * minimum encoding buffer size
452 * Used to avoid some checks during header writing.
0ecca7a4
MN
453 */
454#define FF_MIN_BUFFER_SIZE 16384
455
47146dfb 456
0e373b95 457/**
bafc102b 458 * motion estimation type.
0e373b95 459 */
e4986da9 460enum Motion_Est_ID {
9b4dd1b8 461 ME_ZERO = 1, ///< no search, that is use 0,0 vector whenever one is needed
e4986da9
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462 ME_FULL,
463 ME_LOG,
464 ME_PHODS,
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465 ME_EPZS, ///< enhanced predictive zonal search
466 ME_X1, ///< reserved for experiments
467 ME_HEX, ///< hexagon based search
468 ME_UMH, ///< uneven multi-hexagon search
469 ME_ITER, ///< iterative search
359bbdab 470 ME_TESA, ///< transformed exhaustive search algorithm
e4986da9
J
471};
472
8c3eba7c 473enum AVDiscard{
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474 /* We leave some space between them for extensions (drop some
475 * keyframes for intra-only or drop just some bidir frames). */
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476 AVDISCARD_NONE =-16, ///< discard nothing
477 AVDISCARD_DEFAULT= 0, ///< discard useless packets like 0 size packets in avi
478 AVDISCARD_NONREF = 8, ///< discard all non reference
479 AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
480 AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
481 AVDISCARD_ALL = 48, ///< discard all
482};
483
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484enum AVColorPrimaries{
485 AVCOL_PRI_BT709 =1, ///< also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP177 Annex B
486 AVCOL_PRI_UNSPECIFIED=2,
487 AVCOL_PRI_BT470M =4,
488 AVCOL_PRI_BT470BG =5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM
489 AVCOL_PRI_SMPTE170M =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC
490 AVCOL_PRI_SMPTE240M =7, ///< functionally identical to above
491 AVCOL_PRI_FILM =8,
492 AVCOL_PRI_NB , ///< Not part of ABI
493};
494
495enum AVColorTransferCharacteristic{
496 AVCOL_TRC_BT709 =1, ///< also ITU-R BT1361
497 AVCOL_TRC_UNSPECIFIED=2,
498 AVCOL_TRC_GAMMA22 =4, ///< also ITU-R BT470M / ITU-R BT1700 625 PAL & SECAM
499 AVCOL_TRC_GAMMA28 =5, ///< also ITU-R BT470BG
500 AVCOL_TRC_NB , ///< Not part of ABI
501};
502
503enum AVColorSpace{
504 AVCOL_SPC_RGB =0,
505 AVCOL_SPC_BT709 =1, ///< also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
506 AVCOL_SPC_UNSPECIFIED=2,
507 AVCOL_SPC_FCC =4,
508 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
509 AVCOL_SPC_SMPTE170M =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC / functionally identical to above
510 AVCOL_SPC_SMPTE240M =7,
511 AVCOL_SPC_NB , ///< Not part of ABI
512};
513
514enum AVColorRange{
515 AVCOL_RANGE_UNSPECIFIED=0,
516 AVCOL_RANGE_MPEG =1, ///< the normal 219*2^(n-8) "MPEG" YUV ranges
517 AVCOL_RANGE_JPEG =2, ///< the normal 2^n-1 "JPEG" YUV ranges
518 AVCOL_RANGE_NB , ///< Not part of ABI
519};
520
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521/**
522 * X X 3 4 X X are luma samples,
523 * 1 2 1-6 are possible chroma positions
524 * X X 5 6 X 0 is undefined/unknown position
525 */
526enum AVChromaLocation{
527 AVCHROMA_LOC_UNSPECIFIED=0,
528 AVCHROMA_LOC_LEFT =1, ///< mpeg2/4, h264 default
529 AVCHROMA_LOC_CENTER =2, ///< mpeg1, jpeg, h263
530 AVCHROMA_LOC_TOPLEFT =3, ///< DV
531 AVCHROMA_LOC_TOP =4,
532 AVCHROMA_LOC_BOTTOMLEFT =5,
533 AVCHROMA_LOC_BOTTOM =6,
534 AVCHROMA_LOC_NB , ///< Not part of ABI
535};
536
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537/**
538 * LPC analysis type
539 */
540enum AVLPCType {
541 AV_LPC_TYPE_DEFAULT = -1, ///< use the codec default LPC type
542 AV_LPC_TYPE_NONE = 0, ///< do not use LPC prediction or use all zero coefficients
543 AV_LPC_TYPE_FIXED = 1, ///< fixed LPC coefficients
544 AV_LPC_TYPE_LEVINSON = 2, ///< Levinson-Durbin recursion
545 AV_LPC_TYPE_CHOLESKY = 3, ///< Cholesky factorization
546 AV_LPC_TYPE_NB , ///< Not part of ABI
547};
548
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549typedef struct RcOverride{
550 int start_frame;
551 int end_frame;
f5bccd85 552 int qscale; // If this is 0 then quality_factor will be used instead.
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553 float quality_factor;
554} RcOverride;
555
b0ec9efd 556#define FF_MAX_B_FRAMES 16
9dbcbd92 557
a949d72e 558/* encoding support
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559 These flags can be passed in AVCodecContext.flags before initialization.
560 Note: Not everything is supported yet.
a949d72e 561*/
de6d9b64 562
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563#define CODEC_FLAG_QSCALE 0x0002 ///< Use fixed qscale.
564#define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / advanced prediction for H.263.
565#define CODEC_FLAG_QPEL 0x0010 ///< Use qpel MC.
566#define CODEC_FLAG_GMC 0x0020 ///< Use GMC.
567#define CODEC_FLAG_MV0 0x0040 ///< Always try a MB with MV=<0,0>.
568#define CODEC_FLAG_PART 0x0080 ///< Use data partitioning.
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569/**
570 * The parent program guarantees that the input for B-frames containing
f5bccd85 571 * streams is not written to for at least s->max_b_frames+1 frames, if
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572 * this is not set the input will be copied.
573 */
8b4c7dbc 574#define CODEC_FLAG_INPUT_PRESERVED 0x0100
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575#define CODEC_FLAG_PASS1 0x0200 ///< Use internal 2pass ratecontrol in first pass mode.
576#define CODEC_FLAG_PASS2 0x0400 ///< Use internal 2pass ratecontrol in second pass mode.
577#define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< Use external Huffman table (for MJPEG).
578#define CODEC_FLAG_GRAY 0x2000 ///< Only decode/encode grayscale.
579#define CODEC_FLAG_EMU_EDGE 0x4000 ///< Don't draw edges.
580#define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding.
581#define CODEC_FLAG_TRUNCATED 0x00010000 /** Input bitstream might be truncated at a random
582 location instead of only at frame boundaries. */
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583#define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< Normalize adaptive quantization.
584#define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT.
585#define CODEC_FLAG_LOW_DELAY 0x00080000 ///< Force low delay.
586#define CODEC_FLAG_ALT_SCAN 0x00100000 ///< Use alternate scan.
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587#define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< Place global headers in extradata instead of every keyframe.
588#define CODEC_FLAG_BITEXACT 0x00800000 ///< Use only bitexact stuff (except (I)DCT).
21e59552 589/* Fx : Flag for h263+ extra options */
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590#define CODEC_FLAG_AC_PRED 0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction
591#define CODEC_FLAG_H263P_UMV 0x02000000 ///< unlimited motion vector
592#define CODEC_FLAG_CBP_RD 0x04000000 ///< Use rate distortion optimization for cbp.
593#define CODEC_FLAG_QP_RD 0x08000000 ///< Use rate distortion optimization for qp selectioon.
594#define CODEC_FLAG_H263P_AIV 0x00000008 ///< H.263 alternative inter VLC
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595#define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
596#define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
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597#define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
598#define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
f5bccd85 599#define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< Will reserve space for SVCD scan offset user data.
f3eec1cf 600#define CODEC_FLAG_CLOSED_GOP 0x80000000
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601#define CODEC_FLAG2_FAST 0x00000001 ///< Allow non spec compliant speedup tricks.
602#define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< Strictly enforce GOP size.
603#define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< Skip bitstream encoding.
604#define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< Place global headers at every keyframe instead of in extradata.
605#define CODEC_FLAG2_BPYRAMID 0x00000010 ///< H.264 allow B-frames to be used as references.
606#define CODEC_FLAG2_WPRED 0x00000020 ///< H.264 weighted biprediction for B-frames
d3075ed5 607#define CODEC_FLAG2_MIXED_REFS 0x00000040 ///< H.264 one reference per partition, as opposed to one reference per macroblock
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608#define CODEC_FLAG2_8X8DCT 0x00000080 ///< H.264 high profile 8x8 transform
609#define CODEC_FLAG2_FASTPSKIP 0x00000100 ///< H.264 fast pskip
610#define CODEC_FLAG2_AUD 0x00000200 ///< H.264 access unit delimiters
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611#define CODEC_FLAG2_BRDO 0x00000400 ///< B-frame rate-distortion optimization
612#define CODEC_FLAG2_INTRA_VLC 0x00000800 ///< Use MPEG-2 intra VLC table.
613#define CODEC_FLAG2_MEMC_ONLY 0x00001000 ///< Only do ME/MC (I frames -> ref, P frame -> ME+MC).
614#define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format.
615#define CODEC_FLAG2_SKIP_RD 0x00004000 ///< RD optimal MB level residual skipping
616#define CODEC_FLAG2_CHUNKS 0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
617#define CODEC_FLAG2_NON_LINEAR_QUANT 0x00010000 ///< Use MPEG-2 nonlinear quantizer.
f1618fd9 618#define CODEC_FLAG2_BIT_RESERVOIR 0x00020000 ///< Use a bit reservoir when encoding if possible
25a42948 619#define CODEC_FLAG2_MBTREE 0x00040000 ///< Use macroblock tree ratecontrol (x264 only)
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620#define CODEC_FLAG2_PSY 0x00080000 ///< Use psycho visual optimizations.
621#define CODEC_FLAG2_SSIM 0x00100000 ///< Compute SSIM during encoding, error[] values are undefined.
e8c7fca9 622#define CODEC_FLAG2_INTRA_REFRESH 0x00200000 ///< Use periodic insertion of intra blocks instead of keyframes.
6fc5b059 623
21e59552 624/* Unsupported options :
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625 * Syntax Arithmetic coding (SAC)
626 * Reference Picture Selection
eafcac6a 627 * Independent Segment Decoding */
21e59552 628/* /Fx */
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629/* codec capabilities */
630
f5bccd85 631#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback.
6814a25c 632/**
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633 * Codec uses get_buffer() for allocating buffers and supports custom allocators.
634 * If not set, it might not use get_buffer() at all or use operations that
635 * assume the buffer was allocated by avcodec_default_get_buffer.
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636 */
637#define CODEC_CAP_DR1 0x0002
f5bccd85 638/* If 'parse_only' field is true, then avcodec_parse_frame() can be used. */
917e06c8 639#define CODEC_CAP_PARSE_ONLY 0x0004
d7425f59 640#define CODEC_CAP_TRUNCATED 0x0008
f5bccd85 641/* Codec can export data for HW decoding (XvMC). */
5e5c247a 642#define CODEC_CAP_HWACCEL 0x0010
115329f1 643/**
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644 * Codec has a nonzero delay and needs to be fed with NULL at the end to get the delayed data.
645 * If this is not set, the codec is guaranteed to never be fed with NULL data.
934982c4 646 */
6f824977 647#define CODEC_CAP_DELAY 0x0020
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648/**
649 * Codec can be fed a final frame with a smaller size.
650 * This can be used to prevent truncation of the last audio samples.
651 */
652#define CODEC_CAP_SMALL_LAST_FRAME 0x0040
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653/**
654 * Codec can export data for HW decoding (VDPAU).
655 */
656#define CODEC_CAP_HWACCEL_VDPAU 0x0080
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657/**
658 * Codec can output multiple frames per AVPacket
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659 * Normally demuxers return one frame at a time, demuxers which do not do
660 * are connected to a parser to split what they return into proper frames.
661 * This flag is reserved to the very rare category of codecs which have a
662 * bitstream that cannot be split into frames without timeconsuming
663 * operations like full decoding. Demuxers carring such bitstreams thus
664 * may return multiple frames in a packet. This has many disadvantages like
665 * prohibiting stream copy in many cases thus it should only be considered
666 * as a last resort.
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667 */
668#define CODEC_CAP_SUBFRAMES 0x0100
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669/**
670 * Codec is experimental and is thus avoided in favor of non experimental
671 * encoders
672 */
673#define CODEC_CAP_EXPERIMENTAL 0x0200
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674/**
675 * Codec should fill in channel configuration and samplerate instead of container
676 */
677#define CODEC_CAP_CHANNEL_CONF 0x0400
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678/**
679 * Codec is able to deal with negative linesizes
680 */
681#define CODEC_CAP_NEG_LINESIZES 0x0800
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682/**
683 * Codec supports frame-level multithreading.
684 */
685#define CODEC_CAP_FRAME_THREADS 0x1000
bf89e6b1 686
f5bccd85 687//The following defines may change, don't expect compatibility if you use them.
8d7ec294 688#define MB_TYPE_INTRA4x4 0x0001
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689#define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
690#define MB_TYPE_INTRA_PCM 0x0004 //FIXME H.264-specific
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691#define MB_TYPE_16x16 0x0008
692#define MB_TYPE_16x8 0x0010
693#define MB_TYPE_8x16 0x0020
694#define MB_TYPE_8x8 0x0040
695#define MB_TYPE_INTERLACED 0x0080
273b0cd3 696#define MB_TYPE_DIRECT2 0x0100 //FIXME
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697#define MB_TYPE_ACPRED 0x0200
698#define MB_TYPE_GMC 0x0400
699#define MB_TYPE_SKIP 0x0800
700#define MB_TYPE_P0L0 0x1000
701#define MB_TYPE_P1L0 0x2000
702#define MB_TYPE_P0L1 0x4000
703#define MB_TYPE_P1L1 0x8000
704#define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
705#define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
706#define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
707#define MB_TYPE_QUANT 0x00010000
708#define MB_TYPE_CBP 0x00020000
709//Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
710
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711/**
712 * Pan Scan area.
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713 * This specifies the area which should be displayed.
714 * Note there may be multiple such areas for one frame.
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715 */
716typedef struct AVPanScan{
717 /**
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718 * id
719 * - encoding: Set by user.
720 * - decoding: Set by libavcodec.
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721 */
722 int id;
723
724 /**
725 * width and height in 1/16 pel
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726 * - encoding: Set by user.
727 * - decoding: Set by libavcodec.
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728 */
729 int width;
730 int height;
731
732 /**
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733 * position of the top left corner in 1/16 pel for up to 3 fields/frames
734 * - encoding: Set by user.
735 * - decoding: Set by libavcodec.
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736 */
737 int16_t position[3][2];
738}AVPanScan;
739
492cd3a9 740#define FF_COMMON_FRAME \
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741 /**\
742 * pointer to the picture planes.\
f5bccd85 743 * This might be different from the first allocated byte\
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744 * - encoding: \
745 * - decoding: \
746 */\
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747 uint8_t *data[4];\
748 int linesize[4];\
749 /**\
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750 * pointer to the first allocated byte of the picture. Can be used in get_buffer/release_buffer.\
751 * This isn't used by libavcodec unless the default get/release_buffer() is used.\
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752 * - encoding: \
753 * - decoding: \
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754 */\
755 uint8_t *base[4];\
756 /**\
757 * 1 -> keyframe, 0-> not\
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758 * - encoding: Set by libavcodec.\
759 * - decoding: Set by libavcodec.\
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760 */\
761 int key_frame;\
762\
763 /**\
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764 * Picture type of the frame, see ?_TYPE below.\
765 * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
766 * - decoding: Set by libavcodec.\
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767 */\
768 int pict_type;\
769\
770 /**\
c0df9d75 771 * presentation timestamp in time_base units (time when frame should be shown to user)\
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772 * If AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed.\
773 * - encoding: MUST be set by user.\
774 * - decoding: Set by libavcodec.\
1e491e29 775 */\
be6784dc 776 int64_t pts;\
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777\
778 /**\
f5bccd85 779 * picture number in bitstream order\
64863965 780 * - encoding: set by\
f5bccd85 781 * - decoding: Set by libavcodec.\
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782 */\
783 int coded_picture_number;\
784 /**\
f5bccd85 785 * picture number in display order\
64863965 786 * - encoding: set by\
f5bccd85 787 * - decoding: Set by libavcodec.\
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788 */\
789 int display_picture_number;\
790\
791 /**\
158c7f05 792 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
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793 * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
794 * - decoding: Set by libavcodec.\
1e491e29 795 */\
158c7f05 796 int quality; \
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797\
798 /**\
799 * buffer age (1->was last buffer and dint change, 2->..., ...).\
f5bccd85 800 * Set to INT_MAX if the buffer has not been used yet.\
64863965 801 * - encoding: unused\
f5bccd85 802 * - decoding: MUST be set by get_buffer().\
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803 */\
804 int age;\
805\
806 /**\
807 * is this picture used as reference\
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808 * The values for this are the same as the MpegEncContext.picture_structure\
809 * variable, that is 1->top field, 2->bottom field, 3->frame/both fields.\
5fe2a515 810 * Set to 4 for delayed, non-reference frames.\
64863965 811 * - encoding: unused\
f5bccd85 812 * - decoding: Set by libavcodec. (before get_buffer() call)).\
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813 */\
814 int reference;\
815\
816 /**\
817 * QP table\
64863965 818 * - encoding: unused\
f5bccd85 819 * - decoding: Set by libavcodec.\
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820 */\
821 int8_t *qscale_table;\
822 /**\
823 * QP store stride\
64863965 824 * - encoding: unused\
f5bccd85 825 * - decoding: Set by libavcodec.\
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826 */\
827 int qstride;\
828\
829 /**\
f5bccd85 830 * mbskip_table[mb]>=1 if MB didn't change\
1e491e29 831 * stride= mb_width = (width+15)>>4\
64863965 832 * - encoding: unused\
f5bccd85 833 * - decoding: Set by libavcodec.\
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834 */\
835 uint8_t *mbskip_table;\
836\
837 /**\
f5bccd85 838 * motion vector table\
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839 * @code\
840 * example:\
841 * int mv_sample_log2= 4 - motion_subsample_log2;\
842 * int mb_width= (width+15)>>4;\
843 * int mv_stride= (mb_width << mv_sample_log2) + 1;\
844 * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
845 * @endcode\
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846 * - encoding: Set by user.\
847 * - decoding: Set by libavcodec.\
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848 */\
849 int16_t (*motion_val[2])[2];\
850\
851 /**\
f5bccd85 852 * macroblock type table\
8d7ec294 853 * mb_type_base + mb_width + 2\
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854 * - encoding: Set by user.\
855 * - decoding: Set by libavcodec.\
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856 */\
857 uint32_t *mb_type;\
858\
859 /**\
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860 * log2 of the size of the block which a single vector in motion_val represents: \
861 * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
8d7ec294 862 * - encoding: unused\
f5bccd85 863 * - decoding: Set by libavcodec.\
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864 */\
865 uint8_t motion_subsample_log2;\
866\
867 /**\
1e491e29 868 * for some private data of the user\
64863965 869 * - encoding: unused\
f5bccd85 870 * - decoding: Set by user.\
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871 */\
872 void *opaque;\
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873\
874 /**\
875 * error\
f5bccd85 876 * - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR.\
64863965 877 * - decoding: unused\
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878 */\
879 uint64_t error[4];\
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880\
881 /**\
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882 * type of the buffer (to keep track of who has to deallocate data[*])\
883 * - encoding: Set by the one who allocates it.\
884 * - decoding: Set by the one who allocates it.\
885 * Note: User allocated (direct rendering) & internal buffers cannot coexist currently.\
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886 */\
887 int type;\
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888 \
889 /**\
f5bccd85 890 * When decoding, this signals how much the picture must be delayed.\
2ec23b6d 891 * extra_delay = repeat_pict / (2*fps)\
64863965 892 * - encoding: unused\
f5bccd85 893 * - decoding: Set by libavcodec.\
2ec23b6d 894 */\
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895 int repeat_pict;\
896 \
897 /**\
898 * \
899 */\
900 int qscale_type;\
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901 \
902 /**\
903 * The content of the picture is interlaced.\
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904 * - encoding: Set by user.\
905 * - decoding: Set by libavcodec. (default 0)\
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906 */\
907 int interlaced_frame;\
908 \
909 /**\
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910 * If the content is interlaced, is top field displayed first.\
911 * - encoding: Set by user.\
912 * - decoding: Set by libavcodec.\
2744ca9a 913 */\
9dad924e 914 int top_field_first;\
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915 \
916 /**\
917 * Pan scan.\
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918 * - encoding: Set by user.\
919 * - decoding: Set by libavcodec.\
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920 */\
921 AVPanScan *pan_scan;\
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922 \
923 /**\
f5bccd85 924 * Tell user application that palette has changed from previous frame.\
2a2bbcb0 925 * - encoding: ??? (no palette-enabled encoder yet)\
f5bccd85 926 * - decoding: Set by libavcodec. (default 0).\
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927 */\
928 int palette_has_changed;\
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RT
929 \
930 /**\
f5bccd85 931 * codec suggestion on buffer type if != 0\
074c4ca7 932 * - encoding: unused\
f5bccd85 933 * - decoding: Set by libavcodec. (before get_buffer() call)).\
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934 */\
935 int buffer_hints;\
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936\
937 /**\
f5bccd85 938 * DCT coefficients\
8289c6fa 939 * - encoding: unused\
f5bccd85 940 * - decoding: Set by libavcodec.\
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941 */\
942 short *dct_coeff;\
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943\
944 /**\
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945 * motion reference frame index\
946 * the order in which these are stored can depend on the codec.\
f5bccd85
DB
947 * - encoding: Set by user.\
948 * - decoding: Set by libavcodec.\
a4d36c11 949 */\
79de84f2
MN
950 int8_t *ref_index[2];\
951\
952 /**\
421167b0 953 * reordered opaque 64bit (generally an integer or a double precision float\
e75229fa
MN
954 * PTS but can be anything). \
955 * The user sets AVCodecContext.reordered_opaque to represent the input at\
421167b0
SS
956 * that time,\
957 * the decoder reorders values as needed and sets AVFrame.reordered_opaque\
e75229fa 958 * to exactly one of the values provided by the user through AVCodecContext.reordered_opaque \
81c623fa 959 * @deprecated in favor of pkt_pts\
79de84f2
MN
960 * - encoding: unused\
961 * - decoding: Read by user.\
962 */\
963 int64_t reordered_opaque;\
68e5d523
GB
964\
965 /**\
966 * hardware accelerator private data (FFmpeg allocated)\
967 * - encoding: unused\
968 * - decoding: Set by libavcodec\
969 */\
952e2083 970 void *hwaccel_picture_private;\
393cbb96
MN
971\
972 /**\
973 * reordered pts from the last AVPacket that has been input into the decoder\
974 * - encoding: unused\
975 * - decoding: Read by user.\
976 */\
977 int64_t pkt_pts;\
1919feaf
MN
978\
979 /**\
980 * dts from the last AVPacket that has been input into the decoder\
981 * - encoding: unused\
982 * - decoding: Read by user.\
983 */\
984 int64_t pkt_dts;\
37b00b47
AS
985\
986 /**\
987 * the AVCodecContext which ff_thread_get_buffer() was last called on\
988 * - encoding: Set by libavcodec.\
989 * - decoding: Set by libavcodec.\
990 */\
991 struct AVCodecContext *owner;\
992\
993 /**\
994 * used by multithreading to store frame-specific info\
995 * - encoding: Set by libavcodec.\
996 * - decoding: Set by libavcodec.\
997 */\
2a03e873 998 void *thread_opaque;\
2ec23b6d 999
bb270c08
DB
1000#define FF_QSCALE_TYPE_MPEG1 0
1001#define FF_QSCALE_TYPE_MPEG2 1
1002#define FF_QSCALE_TYPE_H264 2
800274f8 1003#define FF_QSCALE_TYPE_VP56 3
4e00e76b
MN
1004
1005#define FF_BUFFER_TYPE_INTERNAL 1
f5bccd85
DB
1006#define FF_BUFFER_TYPE_USER 2 ///< direct rendering buffers (image is (de)allocated by user)
1007#define FF_BUFFER_TYPE_SHARED 4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared.
1008#define FF_BUFFER_TYPE_COPY 8 ///< Just a (modified) copy of some other buffer, don't deallocate anything.
4e00e76b 1009
1e491e29 1010
dc85e859
AJ
1011#define FF_I_TYPE 1 ///< Intra
1012#define FF_P_TYPE 2 ///< Predicted
1013#define FF_B_TYPE 3 ///< Bi-dir predicted
1014#define FF_S_TYPE 4 ///< S(GMC)-VOP MPEG4
1015#define FF_SI_TYPE 5 ///< Switching Intra
1016#define FF_SP_TYPE 6 ///< Switching Predicted
48d533e6 1017#define FF_BI_TYPE 7
1e491e29 1018
f5bccd85
DB
1019#define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore).
1020#define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer.
1021#define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content.
1022#define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update).
074c4ca7 1023
18c915ee
TB
1024typedef struct AVPacket {
1025 /**
7b356d39
RS
1026 * Presentation timestamp in AVStream->time_base units; the time at which
1027 * the decompressed packet will be presented to the user.
18c915ee
TB
1028 * Can be AV_NOPTS_VALUE if it is not stored in the file.
1029 * pts MUST be larger or equal to dts as presentation cannot happen before
1030 * decompression, unless one wants to view hex dumps. Some formats misuse
1031 * the terms dts and pts/cts to mean something different. Such timestamps
1032 * must be converted to true pts/dts before they are stored in AVPacket.
1033 */
1034 int64_t pts;
1035 /**
7b356d39
RS
1036 * Decompression timestamp in AVStream->time_base units; the time at which
1037 * the packet is decompressed.
18c915ee
TB
1038 * Can be AV_NOPTS_VALUE if it is not stored in the file.
1039 */
1040 int64_t dts;
1041 uint8_t *data;
1042 int size;
1043 int stream_index;
1044 int flags;
1045 /**
7b356d39 1046 * Duration of this packet in AVStream->time_base units, 0 if unknown.
18c915ee
TB
1047 * Equals next_pts - this_pts in presentation order.
1048 */
1049 int duration;
1050 void (*destruct)(struct AVPacket *);
1051 void *priv;
1052 int64_t pos; ///< byte position in stream, -1 if unknown
1053
1054 /**
7b356d39 1055 * Time difference in AVStream->time_base units from the pts of this
18c915ee
TB
1056 * packet to the point at which the output from the decoder has converged
1057 * independent from the availability of previous frames. That is, the
1058 * frames are virtually identical no matter if decoding started from
1059 * the very first frame or from this keyframe.
1060 * Is AV_NOPTS_VALUE if unknown.
1061 * This field is not the display duration of the current packet.
8ee82f40
AJ
1062 * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
1063 * set.
18c915ee
TB
1064 *
1065 * The purpose of this field is to allow seeking in streams that have no
1066 * keyframes in the conventional sense. It corresponds to the
1067 * recovery point SEI in H.264 and match_time_delta in NUT. It is also
1068 * essential for some types of subtitle streams to ensure that all
1069 * subtitles are correctly displayed after seeking.
1070 */
1071 int64_t convergence_duration;
1072} AVPacket;
8f3f2e06
RD
1073#define AV_PKT_FLAG_KEY 0x0001
1074#if LIBAVCODEC_VERSION_MAJOR < 53
1075#define PKT_FLAG_KEY AV_PKT_FLAG_KEY
1076#endif
18c915ee 1077
0da71265
MN
1078/**
1079 * Audio Video Frame.
ba66ae94
MN
1080 * New fields can be added to the end of FF_COMMON_FRAME with minor version
1081 * bumps.
8bfb108b 1082 * Removal, reordering and changes to existing fields require a major
ba66ae94
MN
1083 * version bump. No fields should be added into AVFrame before or after
1084 * FF_COMMON_FRAME!
8bfb108b 1085 * sizeof(AVFrame) must not be used outside libav*.
0da71265 1086 */
492cd3a9
MN
1087typedef struct AVFrame {
1088 FF_COMMON_FRAME
1089} AVFrame;
1e491e29 1090
d33c949c 1091/**
252f17e2
MN
1092 * main external API structure.
1093 * New fields can be added to the end with minor version bumps.
8bfb108b 1094 * Removal, reordering and changes to existing fields require a major
252f17e2 1095 * version bump.
8bfb108b 1096 * sizeof(AVCodecContext) must not be used outside libav*.
d33c949c 1097 */
de6d9b64 1098typedef struct AVCodecContext {
b71901e6 1099 /**
f5bccd85 1100 * information on struct for av_log
bc874dae
MB
1101 * - set by avcodec_alloc_context
1102 */
d42a814e 1103 const AVClass *av_class;
bc874dae 1104 /**
f5bccd85
DB
1105 * the average bitrate
1106 * - encoding: Set by user; unused for constant quantizer encoding.
1107 * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.
b71901e6 1108 */
de6d9b64 1109 int bit_rate;
b71901e6
MN
1110
1111 /**
64863965 1112 * number of bits the bitstream is allowed to diverge from the reference.
b71901e6 1113 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
f5bccd85 1114 * - encoding: Set by user; unused for constant quantizer encoding.
64863965 1115 * - decoding: unused
b71901e6 1116 */
115329f1 1117 int bit_rate_tolerance;
b71901e6
MN
1118
1119 /**
64863965 1120 * CODEC_FLAG_*.
f5bccd85
DB
1121 * - encoding: Set by user.
1122 * - decoding: Set by user.
b71901e6 1123 */
de6d9b64 1124 int flags;
b71901e6
MN
1125
1126 /**
f5bccd85
DB
1127 * Some codecs need additional format info. It is stored here.
1128 * If any muxer uses this then ALL demuxers/parsers AND encoders for the
1129 * specific codec MUST set it correctly otherwise stream copy breaks.
1130 * In general use of this field by muxers is not recommanded.
1131 * - encoding: Set by libavcodec.
1132 * - decoding: Set by libavcodec. (FIXME: Is this OK?)
b71901e6
MN
1133 */
1134 int sub_id;
1135
1136 /**
f5bccd85 1137 * Motion estimation algorithm used for video coding.
58f7833e 1138 * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
89223ef6 1139 * 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific]
64863965
MN
1140 * - encoding: MUST be set by user.
1141 * - decoding: unused
b71901e6
MN
1142 */
1143 int me_method;
1144
1145 /**
f5bccd85
DB
1146 * some codecs need / can use extradata like Huffman tables.
1147 * mjpeg: Huffman tables
b71901e6 1148 * rv10: additional flags
b704e742 1149 * mpeg4: global headers (they can be in the bitstream or here)
f5bccd85
DB
1150 * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
1151 * than extradata_size to avoid prolems if it is read with the bitstream reader.
1152 * The bytewise contents of extradata must not depend on the architecture or CPU endianness.
1153 * - encoding: Set/allocated/freed by libavcodec.
1154 * - decoding: Set/allocated/freed by user.
b71901e6 1155 */
58f2a4b0 1156 uint8_t *extradata;
e84c31dc 1157 int extradata_size;
115329f1 1158
b71901e6 1159 /**
f5bccd85
DB
1160 * This is the fundamental unit of time (in seconds) in terms
1161 * of which frame timestamps are represented. For fixed-fps content,
5b28c8c3
MN
1162 * timebase should be 1/framerate and timestamp increments should be
1163 * identically 1.
f5bccd85
DB
1164 * - encoding: MUST be set by user.
1165 * - decoding: Set by libavcodec.
b71901e6 1166 */
c0df9d75 1167 AVRational time_base;
115329f1 1168
5b28c8c3 1169 /* video only */
14bea432 1170 /**
21adafec 1171 * picture width / height.
115329f1 1172 * - encoding: MUST be set by user.
f5bccd85
DB
1173 * - decoding: Set by libavcodec.
1174 * Note: For compatibility it is possible to set this instead of
1175 * coded_width/height before decoding.
b71901e6 1176 */
de6d9b64 1177 int width, height;
115329f1 1178
e769f053 1179#define FF_ASPECT_EXTENDED 15
b71901e6
MN
1180
1181 /**
f5bccd85
DB
1182 * the number of pictures in a group of pictures, or 0 for intra_only
1183 * - encoding: Set by user.
64863965 1184 * - decoding: unused
b71901e6
MN
1185 */
1186 int gop_size;
1187
1188 /**
f5bccd85 1189 * Pixel format, see PIX_FMT_xxx.
c1bdc930
TH
1190 * May be set by the demuxer if known from headers.
1191 * May be overriden by the decoder if it knows better.
f5bccd85 1192 * - encoding: Set by user.
c1bdc930 1193 * - decoding: Set by user if known, overridden by libavcodec if known
b71901e6 1194 */
e4eadb4b 1195 enum PixelFormat pix_fmt;
115329f1 1196
bdfcbbed 1197 /**
f5bccd85 1198 * Frame rate emulation. If not zero, the lower layer (i.e. format handler)
bdfcbbed 1199 * has to read frames at native frame rate.
f5bccd85
DB
1200 * - encoding: Set by user.
1201 * - decoding: unused
bdfcbbed
MK
1202 */
1203 int rate_emu;
115329f1 1204
b71901e6 1205 /**
f5bccd85
DB
1206 * If non NULL, 'draw_horiz_band' is called by the libavcodec
1207 * decoder to draw a horizontal band. It improves cache usage. Not
b71901e6 1208 * all codecs can do that. You must check the codec capabilities
f5bccd85 1209 * beforehand.
37b00b47
AS
1210 * When multithreading is used, it may be called from multiple threads
1211 * at the same time; threads might draw different parts of the same AVFrame,
1212 * or multiple AVFrames, and there is no guarantee that slices will be drawn
1213 * in order.
24b1583a
IK
1214 * The function is also used by hardware acceleration APIs.
1215 * It is called at least once during frame decoding to pass
1216 * the data needed for hardware render.
1217 * In that mode instead of pixel data, AVFrame points to
1218 * a structure specific to the acceleration API. The application
1219 * reads the structure and can change some fields to indicate progress
1220 * or mark state.
64863965 1221 * - encoding: unused
f5bccd85 1222 * - decoding: Set by user.
3bb07d61
MN
1223 * @param height the height of the slice
1224 * @param y the y position of the slice
1225 * @param type 1->top field, 2->bottom field, 3->frame
1226 * @param offset offset into the AVFrame.data from which the slice should be read
b71901e6 1227 */
bf89e6b1 1228 void (*draw_horiz_band)(struct AVCodecContext *s,
da64ecc3 1229 const AVFrame *src, int offset[4],
3bb07d61 1230 int y, int type, int height);
bf89e6b1 1231
de6d9b64 1232 /* audio only */
f5bccd85 1233 int sample_rate; ///< samples per second
5fcc4a23 1234 int channels; ///< number of audio channels
a3a5f4d6
MN
1235
1236 /**
f5bccd85
DB
1237 * audio sample format
1238 * - encoding: Set by user.
1239 * - decoding: Set by libavcodec.
a3a5f4d6 1240 */
5d6e4c16 1241 enum AVSampleFormat sample_fmt; ///< sample format
de6d9b64 1242
f5bccd85 1243 /* The following data should not be initialized. */
718b27a7 1244 /**
f5bccd85 1245 * Samples per packet, initialized when calling 'init'.
718b27a7
MN
1246 */
1247 int frame_size;
115329f1 1248 int frame_number; ///< audio or video frame number
c0601d70 1249#if LIBAVCODEC_VERSION_MAJOR < 53
f5bccd85 1250 int real_pict_num; ///< Returns the real picture number of previous encoded frame.
c0601d70 1251#endif
115329f1 1252
b71901e6 1253 /**
f5bccd85 1254 * Number of frames the decoded output will be delayed relative to
64863965 1255 * the encoded input.
f5bccd85 1256 * - encoding: Set by libavcodec.
64863965 1257 * - decoding: unused
b71901e6
MN
1258 */
1259 int delay;
115329f1 1260
64863965
MN
1261 /* - encoding parameters */
1262 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
115329f1
DB
1263 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
1264
b71901e6 1265 /**
f5bccd85
DB
1266 * minimum quantizer
1267 * - encoding: Set by user.
64863965 1268 * - decoding: unused
b71901e6
MN
1269 */
1270 int qmin;
1271
1272 /**
f5bccd85
DB
1273 * maximum quantizer
1274 * - encoding: Set by user.
64863965 1275 * - decoding: unused
b71901e6
MN
1276 */
1277 int qmax;
1278
1279 /**
f5bccd85
DB
1280 * maximum quantizer difference between frames
1281 * - encoding: Set by user.
64863965 1282 * - decoding: unused
b71901e6
MN
1283 */
1284 int max_qdiff;
1285
1286 /**
f5bccd85
DB
1287 * maximum number of B-frames between non-B-frames
1288 * Note: The output will be delayed by max_b_frames+1 relative to the input.
1289 * - encoding: Set by user.
64863965 1290 * - decoding: unused
b71901e6
MN
1291 */
1292 int max_b_frames;
1293
1294 /**
f5bccd85 1295 * qscale factor between IP and B-frames
662e5411 1296 * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
1297 * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
f5bccd85 1298 * - encoding: Set by user.
64863965 1299 * - decoding: unused
b71901e6
MN
1300 */
1301 float b_quant_factor;
115329f1 1302
b71901e6
MN
1303 /** obsolete FIXME remove */
1304 int rc_strategy;
64b7c5b6
MN
1305#define FF_RC_STRATEGY_XVID 1
1306
8b4c7dbc 1307 int b_frame_strategy;
9dbcbd92 1308
b71901e6 1309 /**
85947156
VS
1310 * hurry up amount
1311 * - encoding: unused
1312 * - decoding: Set by user. 1-> Skip B-frames, 2-> Skip IDCT/dequant too, 5-> Skip everything except header
f9ec0aa1 1313 * @deprecated Deprecated in favor of skip_idct and skip_frame.
b71901e6
MN
1314 */
1315 int hurry_up;
115329f1 1316
de6d9b64 1317 struct AVCodec *codec;
115329f1 1318
de6d9b64
FB
1319 void *priv_data;
1320
bb628dae 1321 int rtp_payload_size; /* The size of the RTP payload: the coder will */
f5bccd85 1322 /* do its best to deliver a chunk with size */
644d98a4 1323 /* below rtp_payload_size, the chunk will start */
f5bccd85 1324 /* with a start code on some codecs like H.263. */
644d98a4 1325 /* This doesn't take account of any particular */
f5bccd85 1326 /* headers inside the transmitted RTP payload. */
81401c1f 1327
115329f1 1328
f5bccd85
DB
1329 /* The RTP callback: This function is called */
1330 /* every time the encoder has a packet to send. */
1331 /* It depends on the encoder if the data starts */
1332 /* with a Start Code (it should). H.263 does. */
1333 /* mb_nb contains the number of macroblocks */
1334 /* encoded in the RTP payload. */
115329f1 1335 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
81401c1f 1336
098eefe1
MN
1337 /* statistics, used for 2-pass encoding */
1338 int mv_bits;
1339 int header_bits;
1340 int i_tex_bits;
1341 int p_tex_bits;
1342 int i_count;
1343 int p_count;
1344 int skip_count;
b71901e6 1345 int misc_bits;
115329f1 1346
b71901e6 1347 /**
f5bccd85
DB
1348 * number of bits used for the previously encoded frame
1349 * - encoding: Set by libavcodec.
7004ffb3 1350 * - decoding: unused
b71901e6 1351 */
098eefe1 1352 int frame_bits;
7004ffb3 1353
b71901e6 1354 /**
f5bccd85
DB
1355 * Private data of the user, can be used to carry app specific stuff.
1356 * - encoding: Set by user.
1357 * - decoding: Set by user.
b71901e6
MN
1358 */
1359 void *opaque;
1360
de6d9b64 1361 char codec_name[32];
72415b2a 1362 enum AVMediaType codec_type; /* see AVMEDIA_TYPE_xxx */
4a663d80 1363 enum CodecID codec_id; /* see CODEC_ID_xxx */
115329f1 1364
7004ffb3
MN
1365 /**
1366 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
f5bccd85
DB
1367 * This is used to work around some encoder bugs.
1368 * A demuxer should set this to what is stored in the field used to identify the codec.
1369 * If there are multiple such fields in a container then the demuxer should choose the one
1370 * which maximizes the information about the used codec.
1371 * If the codec tag field in a container is larger then 32 bits then the demuxer should
1372 * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
47bbf8a7 1373 * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
f5bccd85
DB
1374 * first.
1375 * - encoding: Set by user, if not then the default based on codec_id will be used.
1376 * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
7004ffb3
MN
1377 */
1378 unsigned int codec_tag;
115329f1 1379
b71901e6 1380 /**
f5bccd85
DB
1381 * Work around bugs in encoders which sometimes cannot be detected automatically.
1382 * - encoding: Set by user
1383 * - decoding: Set by user
b71901e6
MN
1384 */
1385 int workaround_bugs;
64863965 1386#define FF_BUG_AUTODETECT 1 ///< autodetection
4d2858de
MN
1387#define FF_BUG_OLD_MSMPEG4 2
1388#define FF_BUG_XVID_ILACE 4
1389#define FF_BUG_UMP4 8
1390#define FF_BUG_NO_PADDING 16
3116cb14 1391#define FF_BUG_AMV 32
f5bccd85 1392#define FF_BUG_AC_VLC 0 ///< Will be removed, libavcodec can now handle these non-compliant files by default.
03e93d35 1393#define FF_BUG_QPEL_CHROMA 64
db794953 1394#define FF_BUG_STD_QPEL 128
36df8805 1395#define FF_BUG_QPEL_CHROMA2 256
c40c3482 1396#define FF_BUG_DIRECT_BLOCKSIZE 512
1c6dcb0f 1397#define FF_BUG_EDGE 1024
b44bdf7e 1398#define FF_BUG_HPEL_CHROMA 2048
4ccde216 1399#define FF_BUG_DC_CLIP 4096
f5bccd85 1400#define FF_BUG_MS 8192 ///< Work around various bugs in Microsoft's broken decoders.
3566042a 1401#define FF_BUG_TRUNCATED 16384
f5bccd85 1402//#define FF_BUG_FAKE_SCALABILITY 16 //Autodetection should work 100%.
115329f1 1403
b71901e6 1404 /**
f5bccd85
DB
1405 * luma single coefficient elimination threshold
1406 * - encoding: Set by user.
64863965 1407 * - decoding: unused
b71901e6 1408 */
1f6b6e50 1409 int luma_elim_threshold;
115329f1 1410
b71901e6 1411 /**
f5bccd85
DB
1412 * chroma single coeff elimination threshold
1413 * - encoding: Set by user.
64863965 1414 * - decoding: unused
b71901e6 1415 */
1f6b6e50 1416 int chroma_elim_threshold;
115329f1 1417
b71901e6 1418 /**
f5bccd85
DB
1419 * strictly follow the standard (MPEG4, ...).
1420 * - encoding: Set by user.
5771b2c3
MN
1421 * - decoding: Set by user.
1422 * Setting this to STRICT or higher means the encoder and decoder will
2d525ef4 1423 * generally do stupid things, whereas setting it to unofficial or lower
538c0e13
RB
1424 * will mean the encoder might produce output that is not supported by all
1425 * spec-compliant decoders. Decoders don't differentiate between normal,
2d525ef4 1426 * unofficial and experimental (that is, they always try to decode things
538c0e13 1427 * when they can) unless they are explicitly asked to behave stupidly
5771b2c3 1428 * (=strictly conform to the specs)
b71901e6
MN
1429 */
1430 int strict_std_compliance;
538c0e13 1431#define FF_COMPLIANCE_VERY_STRICT 2 ///< Strictly conform to an older more strict version of the spec or reference software.
f5bccd85 1432#define FF_COMPLIANCE_STRICT 1 ///< Strictly conform to all the things in the spec no matter what consequences.
9cd81798 1433#define FF_COMPLIANCE_NORMAL 0
59b4e5ba 1434#if FF_API_INOFFICIAL
2d525ef4
RB
1435#define FF_COMPLIANCE_INOFFICIAL -1 ///< Allow inofficial extensions (deprecated - use FF_COMPLIANCE_UNOFFICIAL instead).
1436#endif
1437#define FF_COMPLIANCE_UNOFFICIAL -1 ///< Allow unofficial extensions
f5bccd85 1438#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
9cd81798 1439
b71901e6 1440 /**
f5bccd85 1441 * qscale offset between IP and B-frames
f5bccd85 1442 * - encoding: Set by user.
64863965 1443 * - decoding: unused
b71901e6
MN
1444 */
1445 float b_quant_offset;
115329f1 1446
b71901e6 1447 /**
047599a4 1448 * Error recognization; higher values will detect more errors but may
f5bccd85 1449 * misdetect some more or less valid parts as errors.
64863965 1450 * - encoding: unused
f5bccd85 1451 * - decoding: Set by user.
b71901e6 1452 */
047599a4 1453 int error_recognition;
1471c6c2 1454#define FF_ER_CAREFUL 1
ce3bcaed
MN
1455#define FF_ER_COMPLIANT 2
1456#define FF_ER_AGGRESSIVE 3
1457#define FF_ER_VERY_AGGRESSIVE 4
115329f1 1458
6b72ac63 1459 /**
f5bccd85
DB
1460 * Called at the beginning of each frame to get a buffer for it.
1461 * If pic.reference is set then the frame will be read later by libavcodec.
eb285cfe 1462 * avcodec_align_dimensions2() should be used to find the required width and
f5bccd85 1463 * height, as they normally need to be rounded up to the next multiple of 16.
f1b99cc6
MN
1464 * if CODEC_CAP_DR1 is not set then get_buffer() must call
1465 * avcodec_default_get_buffer() instead of providing buffers allocated by
1466 * some other means.
37b00b47
AS
1467 * If frame multithreading is used and thread_safe_callbacks is set,
1468 * it may be called from a different thread, but not from more than one at once.
1469 * Does not need to be reentrant.
64863965 1470 * - encoding: unused
53128bc3 1471 * - decoding: Set by libavcodec, user can override.
b71901e6 1472 */
492cd3a9 1473 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
115329f1 1474
b71901e6 1475 /**
69b192ac 1476 * Called to release buffers which were allocated with get_buffer.
f5bccd85
DB
1477 * A released buffer can be reused in get_buffer().
1478 * pic.data[*] must be set to NULL.
37b00b47
AS
1479 * May be called from a different thread if frame multithreading is used,
1480 * but not by more than one thread at once, so does not need to be reentrant.
64863965 1481 * - encoding: unused
53128bc3 1482 * - decoding: Set by libavcodec, user can override.
b71901e6 1483 */
492cd3a9 1484 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
0fd90455 1485
b71901e6 1486 /**
eb8a25c8 1487 * Size of the frame reordering buffer in the decoder.
2d7b0560 1488 * For MPEG-2 it is 1 IPB or 0 low delay IP.
f5bccd85
DB
1489 * - encoding: Set by libavcodec.
1490 * - decoding: Set by libavcodec.
b71901e6
MN
1491 */
1492 int has_b_frames;
718b27a7
MN
1493
1494 /**
1495 * number of bytes per packet if constant and known or 0
f5bccd85 1496 * Used by some WAV based audio codecs.
718b27a7
MN
1497 */
1498 int block_align;
115329f1 1499
f5bccd85 1500 int parse_only; /* - decoding only: If true, only parsing is done
917e06c8
FB
1501 (function avcodec_parse_frame()). The frame
1502 data is returned. Only MPEG codecs support this now. */
115329f1 1503
b71901e6 1504 /**
f5bccd85
DB
1505 * 0-> h263 quant 1-> mpeg quant
1506 * - encoding: Set by user.
64863965 1507 * - decoding: unused
b71901e6
MN
1508 */
1509 int mpeg_quant;
115329f1 1510
b71901e6 1511 /**
f5bccd85
DB
1512 * pass1 encoding statistics output buffer
1513 * - encoding: Set by libavcodec.
64863965 1514 * - decoding: unused
b71901e6 1515 */
64863965 1516 char *stats_out;
115329f1 1517
b71901e6 1518 /**
f5bccd85
DB
1519 * pass2 encoding statistics input buffer
1520 * Concatenated stuff from stats_out of pass1 should be placed here.
1521 * - encoding: Allocated/set/freed by user.
64863965 1522 * - decoding: unused
b71901e6
MN
1523 */
1524 char *stats_in;
115329f1 1525
b71901e6 1526 /**
f5bccd85
DB
1527 * ratecontrol qmin qmax limiting method
1528 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
1529 * - encoding: Set by user.
64863965 1530 * - decoding: unused
b71901e6 1531 */
ce980a95 1532 float rc_qsquish;
b71901e6 1533
ce980a95
MN
1534 float rc_qmod_amp;
1535 int rc_qmod_freq;
115329f1 1536
b71901e6 1537 /**
f5bccd85
DB
1538 * ratecontrol override, see RcOverride
1539 * - encoding: Allocated/set/freed by user.
64863965 1540 * - decoding: unused
b71901e6 1541 */
ce980a95
MN
1542 RcOverride *rc_override;
1543 int rc_override_count;
115329f1 1544
b71901e6 1545 /**
f5bccd85
DB
1546 * rate control equation
1547 * - encoding: Set by user
64863965 1548 * - decoding: unused
b71901e6 1549 */
6881b8e5 1550 const char *rc_eq;
115329f1 1551
b71901e6 1552 /**
f5bccd85
DB
1553 * maximum bitrate
1554 * - encoding: Set by user.
64863965 1555 * - decoding: unused
b71901e6 1556 */
ce980a95 1557 int rc_max_rate;
115329f1 1558
b71901e6 1559 /**
f5bccd85
DB
1560 * minimum bitrate
1561 * - encoding: Set by user.
64863965 1562 * - decoding: unused
b71901e6 1563 */
ce980a95 1564 int rc_min_rate;
115329f1 1565
b71901e6 1566 /**
f5bccd85
DB
1567 * decoder bitstream buffer size
1568 * - encoding: Set by user.
64863965 1569 * - decoding: unused
b71901e6 1570 */
ce980a95
MN
1571 int rc_buffer_size;
1572 float rc_buffer_aggressivity;
b71901e6
MN
1573
1574 /**
f5bccd85
DB
1575 * qscale factor between P and I-frames
1576 * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
1577 * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1578 * - encoding: Set by user.
64863965 1579 * - decoding: unused
b71901e6
MN
1580 */
1581 float i_quant_factor;
115329f1 1582
b71901e6 1583 /**
f5bccd85
DB
1584 * qscale offset between P and I-frames
1585 * - encoding: Set by user.
64863965 1586 * - decoding: unused
b71901e6
MN
1587 */
1588 float i_quant_offset;
115329f1 1589
b71901e6 1590 /**
f5bccd85
DB
1591 * initial complexity for pass1 ratecontrol
1592 * - encoding: Set by user.
64863965 1593 * - decoding: unused
b71901e6 1594 */
ce980a95 1595 float rc_initial_cplx;
917e06c8 1596
b71901e6 1597 /**
f5bccd85
DB
1598 * DCT algorithm, see FF_DCT_* below
1599 * - encoding: Set by user.
64863965 1600 * - decoding: unused
b71901e6 1601 */
28db7fce 1602 int dct_algo;
c7e07931 1603#define FF_DCT_AUTO 0
28db7fce 1604#define FF_DCT_FASTINT 1
c7e07931
MO
1605#define FF_DCT_INT 2
1606#define FF_DCT_MMX 3
1607#define FF_DCT_MLIB 4
05c4072b 1608#define FF_DCT_ALTIVEC 5
65e4c8c9 1609#define FF_DCT_FAAN 6
115329f1 1610
c5d309f2 1611 /**
f5bccd85
DB
1612 * luminance masking (0-> disabled)
1613 * - encoding: Set by user.
64863965 1614 * - decoding: unused
c5d309f2
MN
1615 */
1616 float lumi_masking;
115329f1 1617
c5d309f2 1618 /**
f5bccd85
DB
1619 * temporary complexity masking (0-> disabled)
1620 * - encoding: Set by user.
64863965 1621 * - decoding: unused
c5d309f2
MN
1622 */
1623 float temporal_cplx_masking;
115329f1 1624
c5d309f2 1625 /**
f5bccd85
DB
1626 * spatial complexity masking (0-> disabled)
1627 * - encoding: Set by user.
64863965 1628 * - decoding: unused
c5d309f2
MN
1629 */
1630 float spatial_cplx_masking;
115329f1 1631
c5d309f2 1632 /**
f5bccd85
DB
1633 * p block masking (0-> disabled)
1634 * - encoding: Set by user.
64863965 1635 * - decoding: unused
c5d309f2
MN
1636 */
1637 float p_masking;
15415af4 1638
5e746b99 1639 /**
f5bccd85
DB
1640 * darkness masking (0-> disabled)
1641 * - encoding: Set by user.
64863965 1642 * - decoding: unused
5e746b99
MN
1643 */
1644 float dark_masking;
115329f1 1645
0c2dd16e 1646 /**
f5bccd85
DB
1647 * IDCT algorithm, see FF_IDCT_* below.
1648 * - encoding: Set by user.
1649 * - decoding: Set by user.
2ad1516a
MN
1650 */
1651 int idct_algo;
273b0cd3
DB
1652#define FF_IDCT_AUTO 0
1653#define FF_IDCT_INT 1
1654#define FF_IDCT_SIMPLE 2
1655#define FF_IDCT_SIMPLEMMX 3
1656#define FF_IDCT_LIBMPEG2MMX 4
1657#define FF_IDCT_PS2 5
1658#define FF_IDCT_MLIB 6
1659#define FF_IDCT_ARM 7
1660#define FF_IDCT_ALTIVEC 8
1661#define FF_IDCT_SH4 9
1662#define FF_IDCT_SIMPLEARM 10
1663#define FF_IDCT_H264 11
1664#define FF_IDCT_VP3 12
1665#define FF_IDCT_IPP 13
1666#define FF_IDCT_XVIDMMX 14
1667#define FF_IDCT_CAVS 15
a0403006 1668#define FF_IDCT_SIMPLEARMV5TE 16
273b0cd3 1669#define FF_IDCT_SIMPLEARMV6 17
d9420d4d 1670#define FF_IDCT_SIMPLEVIS 18
9abc7e0f 1671#define FF_IDCT_WMV2 19
6f08c541 1672#define FF_IDCT_FAAN 20
42b30357 1673#define FF_IDCT_EA 21
7eec4328 1674#define FF_IDCT_SIMPLENEON 22
74c47463 1675#define FF_IDCT_SIMPLEALPHA 23
342c7dfd 1676#define FF_IDCT_BINK 24
2ad1516a 1677
144f0625 1678 /**
f5bccd85
DB
1679 * slice count
1680 * - encoding: Set by libavcodec.
1681 * - decoding: Set by user (or 0).
144f0625
MN
1682 */
1683 int slice_count;
1684 /**
f5bccd85
DB
1685 * slice offsets in the frame in bytes
1686 * - encoding: Set/allocated by libavcodec.
1687 * - decoding: Set/allocated by user (or NULL).
144f0625
MN
1688 */
1689 int *slice_offset;
1690
4d2858de 1691 /**
f5bccd85 1692 * error concealment flags
64863965 1693 * - encoding: unused
f5bccd85 1694 * - decoding: Set by user.
4d2858de
MN
1695 */
1696 int error_concealment;
1697#define FF_EC_GUESS_MVS 1
1698#define FF_EC_DEBLOCK 2
1699
6b72ac63 1700 /**
bec89a84 1701 * dsp_mask could be add used to disable unwanted CPU features
8350df97 1702 * CPU features (i.e. MMX, SSE. ...)
bec89a84 1703 *
f5bccd85
DB
1704 * With the FORCE flag you may instead enable given CPU features.
1705 * (Dangerous: Usable in case of misdetection, improper usage however will
1706 * result into program crash.)
bec89a84
ZK
1707 */
1708 unsigned dsp_mask;
7160bb71
SS
1709
1710#if FF_API_MM_FLAGS
1711#define FF_MM_FORCE AV_CPU_FLAG_FORCE
1712#define FF_MM_MMX AV_CPU_FLAG_MMX
1713#define FF_MM_3DNOW AV_CPU_FLAG_3DNOW
1714#define FF_MM_MMXEXT AV_CPU_FLAG_MMX2
1715#define FF_MM_MMX2 AV_CPU_FLAG_MMX2
1716#define FF_MM_SSE AV_CPU_FLAG_SSE
1717#define FF_MM_SSE2 AV_CPU_FLAG_SSE2
1718#define FF_MM_SSE2SLOW AV_CPU_FLAG_SSE2SLOW
1719#define FF_MM_3DNOWEXT AV_CPU_FLAG_3DNOWEXT
1720#define FF_MM_SSE3 AV_CPU_FLAG_SSE3
1721#define FF_MM_SSE3SLOW AV_CPU_FLAG_SSE3SLOW
1722#define FF_MM_SSSE3 AV_CPU_FLAG_SSSE3
1723#define FF_MM_SSE4 AV_CPU_FLAG_SSE4
1724#define FF_MM_SSE42 AV_CPU_FLAG_SSE42
1725#define FF_MM_IWMMXT AV_CPU_FLAG_IWMMXT
1726#define FF_MM_ALTIVEC AV_CPU_FLAG_ALTIVEC
6b434361 1727#endif
11f18faf
MN
1728
1729 /**
64863965 1730 * bits per sample/pixel from the demuxer (needed for huffyuv).
f5bccd85
DB
1731 * - encoding: Set by libavcodec.
1732 * - decoding: Set by user.
11f18faf 1733 */
46a73068 1734 int bits_per_coded_sample;
115329f1 1735
11f18faf 1736 /**
f5bccd85
DB
1737 * prediction method (needed for huffyuv)
1738 * - encoding: Set by user.
64863965 1739 * - decoding: unused
11f18faf
MN
1740 */
1741 int prediction_method;
1742#define FF_PRED_LEFT 0
1743#define FF_PRED_PLANE 1
1744#define FF_PRED_MEDIAN 2
115329f1 1745
5d3cea3a 1746 /**
f5bccd85 1747 * sample aspect ratio (0 if unknown)
8e5af7a6 1748 * That is the width of a pixel divided by the height of the pixel.
f5bccd85
DB
1749 * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
1750 * - encoding: Set by user.
1751 * - decoding: Set by libavcodec.
5d3cea3a 1752 */
5ff85f1d 1753 AVRational sample_aspect_ratio;
1e491e29
MN
1754
1755 /**
f5bccd85
DB
1756 * the picture in the bitstream
1757 * - encoding: Set by libavcodec.
1758 * - decoding: Set by libavcodec.
1e491e29 1759 */
492cd3a9 1760 AVFrame *coded_frame;
c8c437bc
MN
1761
1762 /**
f5bccd85
DB
1763 * debug
1764 * - encoding: Set by user.
1765 * - decoding: Set by user.
c8c437bc
MN
1766 */
1767 int debug;
273b0cd3
DB
1768#define FF_DEBUG_PICT_INFO 1
1769#define FF_DEBUG_RC 2
1770#define FF_DEBUG_BITSTREAM 4
1771#define FF_DEBUG_MB_TYPE 8
1772#define FF_DEBUG_QP 16
1773#define FF_DEBUG_MV 32
1774#define FF_DEBUG_DCT_COEFF 0x00000040
1775#define FF_DEBUG_SKIP 0x00000080
1776#define FF_DEBUG_STARTCODE 0x00000100
1777#define FF_DEBUG_PTS 0x00000200
1778#define FF_DEBUG_ER 0x00000400
1779#define FF_DEBUG_MMCO 0x00000800
1780#define FF_DEBUG_BUGS 0x00001000
1781#define FF_DEBUG_VIS_QP 0x00002000
864119b6 1782#define FF_DEBUG_VIS_MB_TYPE 0x00004000
385c820b 1783#define FF_DEBUG_BUFFERS 0x00008000
37b00b47 1784#define FF_DEBUG_THREADS 0x00010000
115329f1 1785
140cb663 1786 /**
f5bccd85
DB
1787 * debug
1788 * - encoding: Set by user.
1789 * - decoding: Set by user.
0c9bbaec
WH
1790 */
1791 int debug_mv;
1792#define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1793#define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1794#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1795
1796 /**
f5bccd85
DB
1797 * error
1798 * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
64863965 1799 * - decoding: unused
140cb663
MN
1800 */
1801 uint64_t error[4];
115329f1 1802
17a70fde 1803 /**
f5bccd85 1804 * minimum MB quantizer
6e0d8c06 1805 * - encoding: unused
64863965 1806 * - decoding: unused
17a70fde
MN
1807 */
1808 int mb_qmin;
1809
1810 /**
f5bccd85 1811 * maximum MB quantizer
6e0d8c06 1812 * - encoding: unused
64863965 1813 * - decoding: unused
17a70fde
MN
1814 */
1815 int mb_qmax;
115329f1 1816
1457ab52 1817 /**
f5bccd85
DB
1818 * motion estimation comparison function
1819 * - encoding: Set by user.
64863965 1820 * - decoding: unused
1457ab52
MN
1821 */
1822 int me_cmp;
1823 /**
f5bccd85
DB
1824 * subpixel motion estimation comparison function
1825 * - encoding: Set by user.
64863965 1826 * - decoding: unused
1457ab52
MN
1827 */
1828 int me_sub_cmp;
1829 /**
f5bccd85
DB
1830 * macroblock comparison function (not supported yet)
1831 * - encoding: Set by user.
64863965 1832 * - decoding: unused
1457ab52
MN
1833 */
1834 int mb_cmp;
622348f9 1835 /**
f5bccd85
DB
1836 * interlaced DCT comparison function
1837 * - encoding: Set by user.
622348f9
MN
1838 * - decoding: unused
1839 */
1840 int ildct_cmp;
273b0cd3
DB
1841#define FF_CMP_SAD 0
1842#define FF_CMP_SSE 1
1843#define FF_CMP_SATD 2
1844#define FF_CMP_DCT 3
1845#define FF_CMP_PSNR 4
1846#define FF_CMP_BIT 5
1847#define FF_CMP_RD 6
1848#define FF_CMP_ZERO 7
1849#define FF_CMP_VSAD 8
1850#define FF_CMP_VSSE 9
1851#define FF_CMP_NSSE 10
1852#define FF_CMP_W53 11
1853#define FF_CMP_W97 12
0fd6aea1 1854#define FF_CMP_DCTMAX 13
27c61ac5 1855#define FF_CMP_DCT264 14
1457ab52 1856#define FF_CMP_CHROMA 256
115329f1 1857
1457ab52 1858 /**
f5bccd85
DB
1859 * ME diamond size & shape
1860 * - encoding: Set by user.
64863965 1861 * - decoding: unused
1457ab52
MN
1862 */
1863 int dia_size;
b07a5980
MN
1864
1865 /**
f5bccd85
DB
1866 * amount of previous MV predictors (2a+1 x 2a+1 square)
1867 * - encoding: Set by user.
64863965 1868 * - decoding: unused
b07a5980
MN
1869 */
1870 int last_predictor_count;
70ac76c0 1871
f5fb6b34 1872 /**
f5bccd85
DB
1873 * prepass for motion estimation
1874 * - encoding: Set by user.
64863965 1875 * - decoding: unused
f5fb6b34
MN
1876 */
1877 int pre_me;
b07a5980 1878
70ac76c0 1879 /**
f5bccd85
DB
1880 * motion estimation prepass comparison function
1881 * - encoding: Set by user.
64863965 1882 * - decoding: unused
70ac76c0
MN
1883 */
1884 int me_pre_cmp;
826f429a 1885
70ac76c0 1886 /**
f5bccd85
DB
1887 * ME prepass diamond size & shape
1888 * - encoding: Set by user.
64863965 1889 * - decoding: unused
70ac76c0
MN
1890 */
1891 int pre_dia_size;
1892
826f429a 1893 /**
f5bccd85
DB
1894 * subpel ME quality
1895 * - encoding: Set by user.
64863965 1896 * - decoding: unused
826f429a
MN
1897 */
1898 int me_subpel_quality;
1899
a33c7159 1900 /**
f5bccd85 1901 * callback to negotiate the pixelFormat
a33c7159 1902 * @param fmt is the list of formats which are supported by the codec,
f5bccd85
DB
1903 * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
1904 * The first is always the native one.
1905 * @return the chosen format
64863965 1906 * - encoding: unused
f5bccd85 1907 * - decoding: Set by user, if not set the native format will be chosen.
a33c7159 1908 */
494c56d3 1909 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
e2f9490e
FB
1910
1911 /**
f5bccd85
DB
1912 * DTG active format information (additional aspect ratio
1913 * information only used in DVB MPEG-2 transport streams)
1914 * 0 if not set.
115329f1 1915 *
f5bccd85
DB
1916 * - encoding: unused
1917 * - decoding: Set by decoder.
e2f9490e
FB
1918 */
1919 int dtg_active_format;
1920#define FF_DTG_AFD_SAME 8
1921#define FF_DTG_AFD_4_3 9
1922#define FF_DTG_AFD_16_9 10
1923#define FF_DTG_AFD_14_9 11
1924#define FF_DTG_AFD_4_3_SP_14_9 13
1925#define FF_DTG_AFD_16_9_SP_14_9 14
1926#define FF_DTG_AFD_SP_4_3 15
1927
ebbcdc9a 1928 /**
f5bccd85
DB
1929 * maximum motion estimation search range in subpel units
1930 * If 0 then no limit.
115329f1 1931 *
f5bccd85
DB
1932 * - encoding: Set by user.
1933 * - decoding: unused
ebbcdc9a 1934 */
59e0ac8e 1935 int me_range;
ebbcdc9a 1936
65f7062d 1937 /**
f5bccd85
DB
1938 * intra quantizer bias
1939 * - encoding: Set by user.
1984f635
MN
1940 * - decoding: unused
1941 */
1942 int intra_quant_bias;
1943#define FF_DEFAULT_QUANT_BIAS 999999
115329f1 1944
1984f635 1945 /**
f5bccd85
DB
1946 * inter quantizer bias
1947 * - encoding: Set by user.
1984f635
MN
1948 * - decoding: unused
1949 */
1950 int inter_quant_bias;
5cd62665
ZK
1951
1952 /**
f5bccd85
DB
1953 * color table ID
1954 * - encoding: unused
1955 * - decoding: Which clrtable should be used for 8bit RGB images.
1956 * Tables have to be stored somewhere. FIXME
5cd62665
ZK
1957 */
1958 int color_table_id;
115329f1 1959
d90cf87b 1960 /**
f5bccd85
DB
1961 * internal_buffer count
1962 * Don't touch, used by libavcodec default_get_buffer().
d90cf87b
MN
1963 */
1964 int internal_buffer_count;
115329f1 1965
d90cf87b 1966 /**
f5bccd85
DB
1967 * internal_buffers
1968 * Don't touch, used by libavcodec default_get_buffer().
d90cf87b
MN
1969 */
1970 void *internal_buffer;
158c7f05 1971
3d2e8cce 1972 /**
f5bccd85
DB
1973 * Global quality for codecs which cannot change it per frame.
1974 * This should be proportional to MPEG-1/2/4 qscale.
1975 * - encoding: Set by user.
3d2e8cce
MN
1976 * - decoding: unused
1977 */
1978 int global_quality;
115329f1 1979
bd446bb1
MN
1980#define FF_CODER_TYPE_VLC 0
1981#define FF_CODER_TYPE_AC 1
f87459e4
KN
1982#define FF_CODER_TYPE_RAW 2
1983#define FF_CODER_TYPE_RLE 3
1984#define FF_CODER_TYPE_DEFLATE 4
11e659c2
MN
1985 /**
1986 * coder type
f5bccd85 1987 * - encoding: Set by user.
11e659c2
MN
1988 * - decoding: unused
1989 */
1990 int coder_type;
1991
1992 /**
1993 * context model
f5bccd85 1994 * - encoding: Set by user.
11e659c2
MN
1995 * - decoding: unused
1996 */
1997 int context_model;
5639729b
MN
1998#if 0
1999 /**
2000 *
2001 * - encoding: unused
f5bccd85 2002 * - decoding: Set by user.
5639729b
MN
2003 */
2004 uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
2005#endif
115329f1 2006
3bb07d61
MN
2007 /**
2008 * slice flags
2009 * - encoding: unused
f5bccd85 2010 * - decoding: Set by user.
3bb07d61
MN
2011 */
2012 int slice_flags;
2013#define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
2014#define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
2015#define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
2016
fb364ada
IK
2017 /**
2018 * XVideo Motion Acceleration
2019 * - encoding: forbidden
2020 * - decoding: set by decoder
2021 */
2022 int xvmc_acceleration;
115329f1 2023
7d1c3fc1
MN
2024 /**
2025 * macroblock decision mode
f5bccd85 2026 * - encoding: Set by user.
7d1c3fc1
MN
2027 * - decoding: unused
2028 */
2029 int mb_decision;
2030#define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
2031#define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
e6dba5df 2032#define FF_MB_DECISION_RD 2 ///< rate distortion
d6eb3c50
MN
2033
2034 /**
2035 * custom intra quantization matrix
f5bccd85
DB
2036 * - encoding: Set by user, can be NULL.
2037 * - decoding: Set by libavcodec.
d6eb3c50
MN
2038 */
2039 uint16_t *intra_matrix;
2040
2041 /**
2042 * custom inter quantization matrix
f5bccd85
DB
2043 * - encoding: Set by user, can be NULL.
2044 * - decoding: Set by libavcodec.
d6eb3c50
MN
2045 */
2046 uint16_t *inter_matrix;
115329f1 2047
541ae140
MN
2048 /**
2049 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
f5bccd85 2050 * This is used to work around some encoder bugs.
541ae140 2051 * - encoding: unused
f5bccd85 2052 * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
541ae140
MN
2053 */
2054 unsigned int stream_codec_tag;
05fbd0a2
MN
2055
2056 /**
f5bccd85
DB
2057 * scene change detection threshold
2058 * 0 is default, larger means fewer detected scene changes.
2059 * - encoding: Set by user.
05fbd0a2
MN
2060 * - decoding: unused
2061 */
2062 int scenechange_threshold;
158c7f05
MN
2063
2064 /**
f5bccd85
DB
2065 * minimum Lagrange multipler
2066 * - encoding: Set by user.
158c7f05
MN
2067 * - decoding: unused
2068 */
2069 int lmin;
2070
2071 /**
f5bccd85
DB
2072 * maximum Lagrange multipler
2073 * - encoding: Set by user.
158c7f05
MN
2074 * - decoding: unused
2075 */
2076 int lmax;
2a2bbcb0 2077
eda7c983 2078#if FF_API_PALETTE_CONTROL
2a2bbcb0 2079 /**
f5bccd85 2080 * palette control structure
2a2bbcb0 2081 * - encoding: ??? (no palette-enabled encoder yet)
f5bccd85 2082 * - decoding: Set by user.
2a2bbcb0
MM
2083 */
2084 struct AVPaletteControl *palctrl;
eda7c983 2085#endif
821cb11f
MN
2086
2087 /**
2088 * noise reduction strength
f5bccd85 2089 * - encoding: Set by user.
821cb11f
MN
2090 * - decoding: unused
2091 */
2092 int noise_reduction;
115329f1 2093
074c4ca7 2094 /**
f5bccd85
DB
2095 * Called at the beginning of a frame to get cr buffer for it.
2096 * Buffer type (size, hints) must be the same. libavcodec won't check it.
2097 * libavcodec will pass previous buffer in pic, function should return
e1c2a5a0 2098 * same buffer or new buffer with old frame "painted" into it.
f5bccd85 2099 * If pic.data[0] == NULL must behave like get_buffer().
f1b99cc6
MN
2100 * if CODEC_CAP_DR1 is not set then reget_buffer() must call
2101 * avcodec_default_reget_buffer() instead of providing buffers allocated by
2102 * some other means.
074c4ca7 2103 * - encoding: unused
53128bc3 2104 * - decoding: Set by libavcodec, user can override.
074c4ca7 2105 */
e1c2a5a0 2106 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
ba58dabc
MN
2107
2108 /**
f5bccd85
DB
2109 * Number of bits which should be loaded into the rc buffer before decoding starts.
2110 * - encoding: Set by user.
ba58dabc
MN
2111 * - decoding: unused
2112 */
2113 int rc_initial_buffer_occupancy;
2114
2115 /**
2116 *
f5bccd85 2117 * - encoding: Set by user.
ba58dabc
MN
2118 * - decoding: unused
2119 */
2120 int inter_threshold;
2121
2122 /**
f5bccd85
DB
2123 * CODEC_FLAG2_*
2124 * - encoding: Set by user.
2125 * - decoding: Set by user.
ba58dabc
MN
2126 */
2127 int flags2;
7ebfc0ea
MN
2128
2129 /**
f5bccd85
DB
2130 * Simulates errors in the bitstream to test error concealment.
2131 * - encoding: Set by user.
2132 * - decoding: unused
7ebfc0ea
MN
2133 */
2134 int error_rate;
115329f1 2135
a1e257b2
MN
2136 /**
2137 * MP3 antialias algorithm, see FF_AA_* below.
2138 * - encoding: unused
f5bccd85 2139 * - decoding: Set by user.
a1e257b2
MN
2140 */
2141 int antialias_algo;
2142#define FF_AA_AUTO 0
2143#define FF_AA_FASTINT 1 //not implemented yet
2144#define FF_AA_INT 2
2145#define FF_AA_FLOAT 3
77ea0d4b 2146 /**
f5bccd85
DB
2147 * quantizer noise shaping
2148 * - encoding: Set by user.
77ea0d4b
MN
2149 * - decoding: unused
2150 */
2151 int quantizer_noise_shaping;
9c3d33d6
MN
2152
2153 /**
f5bccd85 2154 * thread count
eafcac6a 2155 * is used to decide how many independent tasks should be passed to execute()
f5bccd85
DB
2156 * - encoding: Set by user.
2157 * - decoding: Set by user.
9c3d33d6
MN
2158 */
2159 int thread_count;
115329f1 2160
9c3d33d6 2161 /**
f5bccd85
DB
2162 * The codec may call this to execute several independent things.
2163 * It will return only after finishing all tasks.
2164 * The user may replace this with some multithreaded implementation,
2165 * the default implementation will execute the parts serially.
399cec2f 2166 * @param count the number of things to execute
f5bccd85
DB
2167 * - encoding: Set by libavcodec, user can override.
2168 * - decoding: Set by libavcodec, user can override.
9c3d33d6 2169 */
3a84713a 2170 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size);
115329f1 2171
9c3d33d6 2172 /**
f5bccd85
DB
2173 * thread opaque
2174 * Can be used by execute() to store some per AVCodecContext stuff.
9c3d33d6
MN
2175 * - encoding: set by execute()
2176 * - decoding: set by execute()
2177 */
2178 void *thread_opaque;
a4d36c11
MN
2179
2180 /**
f5bccd85
DB
2181 * Motion estimation threshold below which no motion estimation is
2182 * performed, but instead the user specified motion vectors are used.
115329f1 2183 *
f5bccd85 2184 * - encoding: Set by user.
f20f8a8b 2185 * - decoding: unused
a4d36c11 2186 */
2750b827 2187 int me_threshold;
f20f8a8b
MN
2188
2189 /**
f5bccd85
DB
2190 * Macroblock threshold below which the user specified macroblock types will be used.
2191 * - encoding: Set by user.
f20f8a8b
MN
2192 * - decoding: unused
2193 */
2194 int mb_threshold;
bf266e19
MN
2195
2196 /**
f5bccd85
DB
2197 * precision of the intra DC coefficient - 8
2198 * - encoding: Set by user.
bf266e19
MN
2199 * - decoding: unused
2200 */
2201 int intra_dc_precision;
d4c5d2ad
MN
2202
2203 /**
f5bccd85
DB
2204 * noise vs. sse weight for the nsse comparsion function
2205 * - encoding: Set by user.
d4c5d2ad
MN
2206 * - decoding: unused
2207 */
2208 int nsse_weight;
0dfd33c3
MN
2209
2210 /**
f5bccd85 2211 * Number of macroblock rows at the top which are skipped.
0dfd33c3 2212 * - encoding: unused
f5bccd85 2213 * - decoding: Set by user.
0dfd33c3
MN
2214 */
2215 int skip_top;
2216
2217 /**
f5bccd85 2218 * Number of macroblock rows at the bottom which are skipped.
0dfd33c3 2219 * - encoding: unused
f5bccd85 2220 * - decoding: Set by user.
0dfd33c3
MN
2221 */
2222 int skip_bottom;
baced9f5
MN
2223
2224 /**
2225 * profile
f5bccd85
DB
2226 * - encoding: Set by user.
2227 * - decoding: Set by libavcodec.
baced9f5
MN
2228 */
2229 int profile;
2230#define FF_PROFILE_UNKNOWN -99
aecd0a44 2231#define FF_PROFILE_RESERVED -100
dd0cd3d2 2232
4f2c36ac 2233#define FF_PROFILE_AAC_MAIN 0
273b0cd3
DB
2234#define FF_PROFILE_AAC_LOW 1
2235#define FF_PROFILE_AAC_SSR 2
2236#define FF_PROFILE_AAC_LTP 3
baced9f5 2237
f5a2d285
AH
2238#define FF_PROFILE_DTS 20
2239#define FF_PROFILE_DTS_ES 30
2240#define FF_PROFILE_DTS_96_24 40
2241#define FF_PROFILE_DTS_HD_HRA 50
2242#define FF_PROFILE_DTS_HD_MA 60
2243
aecd0a44
BL
2244#define FF_PROFILE_MPEG2_422 0
2245#define FF_PROFILE_MPEG2_HIGH 1
2246#define FF_PROFILE_MPEG2_SS 2
2247#define FF_PROFILE_MPEG2_SNR_SCALABLE 3
2248#define FF_PROFILE_MPEG2_MAIN 4
2249#define FF_PROFILE_MPEG2_SIMPLE 5
2250
fe9a3fbe
JG
2251#define FF_PROFILE_H264_CONSTRAINED (1<<9) // 8+1; constraint_set1_flag
2252#define FF_PROFILE_H264_INTRA (1<<11) // 8+3; constraint_set3_flag
2253
2254#define FF_PROFILE_H264_BASELINE 66
2255#define FF_PROFILE_H264_CONSTRAINED_BASELINE (66|FF_PROFILE_H264_CONSTRAINED)
2256#define FF_PROFILE_H264_MAIN 77
2257#define FF_PROFILE_H264_EXTENDED 88
2258#define FF_PROFILE_H264_HIGH 100
2259#define FF_PROFILE_H264_HIGH_10 110
2260#define FF_PROFILE_H264_HIGH_10_INTRA (110|FF_PROFILE_H264_INTRA)
2261#define FF_PROFILE_H264_HIGH_422 122
2262#define FF_PROFILE_H264_HIGH_422_INTRA (122|FF_PROFILE_H264_INTRA)
440b6169 2263#define FF_PROFILE_H264_HIGH_444 144
fe9a3fbe
JG
2264#define FF_PROFILE_H264_HIGH_444_PREDICTIVE 244
2265#define FF_PROFILE_H264_HIGH_444_INTRA (244|FF_PROFILE_H264_INTRA)
2266#define FF_PROFILE_H264_CAVLC_444 44
dd0cd3d2 2267
0215006a
HL
2268#define FF_PROFILE_VC1_SIMPLE 0
2269#define FF_PROFILE_VC1_MAIN 1
2270#define FF_PROFILE_VC1_COMPLEX 2
2271#define FF_PROFILE_VC1_ADVANCED 3
2272
baced9f5
MN
2273 /**
2274 * level
f5bccd85
DB
2275 * - encoding: Set by user.
2276 * - decoding: Set by libavcodec.
baced9f5
MN
2277 */
2278 int level;
2279#define FF_LEVEL_UNKNOWN -99
178fcca8
MN
2280
2281 /**
f5bccd85 2282 * low resolution decoding, 1-> 1/2 size, 2->1/4 size
178fcca8 2283 * - encoding: unused
f5bccd85 2284 * - decoding: Set by user.
178fcca8
MN
2285 */
2286 int lowres;
21adafec
MN
2287
2288 /**
f5bccd85
DB
2289 * Bitstream width / height, may be different from width/height if lowres
2290 * or other things are used.
21adafec 2291 * - encoding: unused
f5bccd85 2292 * - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
21adafec
MN
2293 */
2294 int coded_width, coded_height;
bbf18b21
MN
2295
2296 /**
2297 * frame skip threshold
f5bccd85 2298 * - encoding: Set by user.
bbf18b21
MN
2299 * - decoding: unused
2300 */
2301 int frame_skip_threshold;
2302
2303 /**
2304 * frame skip factor
f5bccd85 2305 * - encoding: Set by user.
bbf18b21
MN
2306 * - decoding: unused
2307 */
2308 int frame_skip_factor;
0fd6aea1
MN
2309
2310 /**
2311 * frame skip exponent
f5bccd85 2312 * - encoding: Set by user.
0fd6aea1
MN
2313 * - decoding: unused
2314 */
2315 int frame_skip_exp;
2316
2317 /**
f5bccd85
DB
2318 * frame skip comparison function
2319 * - encoding: Set by user.
0fd6aea1
MN
2320 * - decoding: unused
2321 */
2322 int frame_skip_cmp;
957c743a
CM
2323
2324 /**
f5bccd85 2325 * Border processing masking, raises the quantizer for mbs on the borders
957c743a 2326 * of the picture.
f5bccd85 2327 * - encoding: Set by user.
957c743a
CM
2328 * - decoding: unused
2329 */
2330 float border_masking;
6e0d8c06
MN
2331
2332 /**
f5bccd85
DB
2333 * minimum MB lagrange multipler
2334 * - encoding: Set by user.
6e0d8c06
MN
2335 * - decoding: unused
2336 */
2337 int mb_lmin;
2338
2339 /**
f5bccd85
DB
2340 * maximum MB lagrange multipler
2341 * - encoding: Set by user.
6e0d8c06
MN
2342 * - decoding: unused
2343 */
2344 int mb_lmax;
09c3e44e
MN
2345
2346 /**
115329f1 2347 *
f5bccd85 2348 * - encoding: Set by user.
09c3e44e
MN
2349 * - decoding: unused
2350 */
2351 int me_penalty_compensation;
8c3eba7c
MN
2352
2353 /**
115329f1 2354 *
8c3eba7c 2355 * - encoding: unused
f5bccd85 2356 * - decoding: Set by user.
8c3eba7c
MN
2357 */
2358 enum AVDiscard skip_loop_filter;
2359
2360 /**
115329f1 2361 *
8c3eba7c 2362 * - encoding: unused
f5bccd85 2363 * - decoding: Set by user.
8c3eba7c
MN
2364 */
2365 enum AVDiscard skip_idct;
2366
2367 /**
115329f1 2368 *
8c3eba7c 2369 * - encoding: unused
f5bccd85 2370 * - decoding: Set by user.
8c3eba7c
MN
2371 */
2372 enum AVDiscard skip_frame;
316a2ec8
MN
2373
2374 /**
2375 *
f5bccd85 2376 * - encoding: Set by user.
316a2ec8
MN
2377 * - decoding: unused
2378 */
2379 int bidir_refine;
e8501c93
MN
2380
2381 /**
2382 *
f5bccd85 2383 * - encoding: Set by user.
e8501c93
MN
2384 * - decoding: unused
2385 */
2386 int brd_scale;
58f7833e
RS
2387
2388 /**
2389 * constant rate factor - quality-based VBR - values ~correspond to qps
f5bccd85 2390 * - encoding: Set by user.
58f7833e
RS
2391 * - decoding: unused
2392 */
9f1c1c99 2393 float crf;
58f7833e
RS
2394
2395 /**
2396 * constant quantization parameter rate control method
f5bccd85 2397 * - encoding: Set by user.
58f7833e
RS
2398 * - decoding: unused
2399 */
2400 int cqp;
2401
2402 /**
f5bccd85
DB
2403 * minimum GOP size
2404 * - encoding: Set by user.
58f7833e
RS
2405 * - decoding: unused
2406 */
2407 int keyint_min;
2408
2409 /**
2410 * number of reference frames
f5bccd85 2411 * - encoding: Set by user.
53d55e9e 2412 * - decoding: Set by lavc.
58f7833e
RS
2413 */
2414 int refs;
2415
2416 /**
2417 * chroma qp offset from luma
f5bccd85 2418 * - encoding: Set by user.
58f7833e
RS
2419 * - decoding: unused
2420 */
2421 int chromaoffset;
2422
2423 /**
f5bccd85
DB
2424 * Influences how often B-frames are used.
2425 * - encoding: Set by user.
58f7833e
RS
2426 * - decoding: unused
2427 */
2428 int bframebias;
2429
2430 /**
2431 * trellis RD quantization
f5bccd85 2432 * - encoding: Set by user.
58f7833e
RS
2433 * - decoding: unused
2434 */
2435 int trellis;
2436
2437 /**
f5bccd85
DB
2438 * Reduce fluctuations in qp (before curve compression).
2439 * - encoding: Set by user.
58f7833e
RS
2440 * - decoding: unused
2441 */
2442 float complexityblur;
2443
2444 /**
2445 * in-loop deblocking filter alphac0 parameter
2446 * alpha is in the range -6...6
f5bccd85 2447 * - encoding: Set by user.
58f7833e
RS
2448 * - decoding: unused
2449 */
2450 int deblockalpha;
2451
2452 /**
2453 * in-loop deblocking filter beta parameter
2454 * beta is in the range -6...6
f5bccd85 2455 * - encoding: Set by user.
58f7833e
RS
2456 * - decoding: unused
2457 */
2458 int deblockbeta;
2459
2460 /**
2461 * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
f5bccd85 2462 * - encoding: Set by user.
58f7833e
RS
2463 * - decoding: unused
2464 */
2465 int partitions;
56cc85a0
DB
2466#define X264_PART_I4X4 0x001 /* Analyze i4x4 */
2467#define X264_PART_I8X8 0x002 /* Analyze i8x8 (requires 8x8 transform) */
2468#define X264_PART_P8X8 0x010 /* Analyze p16x8, p8x16 and p8x8 */
2469#define X264_PART_P4X4 0x020 /* Analyze p8x4, p4x8, p4x4 */
2470#define X264_PART_B8X8 0x100 /* Analyze b16x8, b8x16 and b8x8 */
58f7833e
RS
2471
2472 /**
30ab4ded 2473 * direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal), 3 (auto)
f5bccd85 2474 * - encoding: Set by user.
58f7833e
RS
2475 * - decoding: unused
2476 */
2477 int directpred;
4f59b684 2478
14f0c8e2 2479 /**
02c164c1 2480 * Audio cutoff bandwidth (0 means "automatic")
f5bccd85 2481 * - encoding: Set by user.
14f0c8e2
LA
2482 * - decoding: unused
2483 */
2484 int cutoff;
39a64e30
CH
2485
2486 /**
f5bccd85
DB
2487 * Multiplied by qscale for each frame and added to scene_change_score.
2488 * - encoding: Set by user.
39a64e30
CH
2489 * - decoding: unused
2490 */
2491 int scenechange_factor;
1dd509b1
MN
2492
2493 /**
2494 *
f5bccd85
DB
2495 * Note: Value depends upon the compare function used for fullpel ME.
2496 * - encoding: Set by user.
1dd509b1
MN
2497 * - decoding: unused
2498 */
2499 int mv0_threshold;
f9243d34
CH
2500
2501 /**
f5bccd85
DB
2502 * Adjusts sensitivity of b_frame_strategy 1.
2503 * - encoding: Set by user.
f9243d34
CH
2504 * - decoding: unused
2505 */
2506 int b_sensitivity;
a403fc03
JR
2507
2508 /**
f5bccd85 2509 * - encoding: Set by user.
a403fc03
JR
2510 * - decoding: unused
2511 */
2512 int compression_level;
2513#define FF_COMPRESSION_DEFAULT -1
2514
0743de4f 2515#if FF_API_USE_LPC
a403fc03 2516 /**
f5bccd85
DB
2517 * Sets whether to use LPC mode - used by FLAC encoder.
2518 * - encoding: Set by user.
2519 * - decoding: unused
23940f14 2520 * @deprecated Deprecated in favor of lpc_type and lpc_passes.
a403fc03
JR
2521 */
2522 int use_lpc;
23940f14 2523#endif
a403fc03
JR
2524
2525 /**
2526 * LPC coefficient precision - used by FLAC encoder
f5bccd85
DB
2527 * - encoding: Set by user.
2528 * - decoding: unused
a403fc03
JR
2529 */
2530 int lpc_coeff_precision;
2531
2532 /**
f5bccd85
DB
2533 * - encoding: Set by user.
2534 * - decoding: unused
a403fc03
JR
2535 */
2536 int min_prediction_order;
2537
2538 /**
f5bccd85
DB
2539 * - encoding: Set by user.
2540 * - decoding: unused
a403fc03
JR
2541 */
2542 int max_prediction_order;
2543
2544 /**
2545 * search method for selecting prediction order
f5bccd85
DB
2546 * - encoding: Set by user.
2547 * - decoding: unused
a403fc03
JR
2548 */
2549 int prediction_order_method;
2550
2551 /**
f5bccd85
DB
2552 * - encoding: Set by user.
2553 * - decoding: unused
a403fc03
JR
2554 */
2555 int min_partition_order;
2556
2557 /**
f5bccd85
DB
2558 * - encoding: Set by user.
2559 * - decoding: unused
a403fc03
JR
2560 */
2561 int max_partition_order;
80d617f5
BC
2562
2563 /**
2564 * GOP timecode frame start number, in non drop frame format
f5bccd85
DB
2565 * - encoding: Set by user.
2566 * - decoding: unused
80d617f5
BC
2567 */
2568 int64_t timecode_frame_start;
b1ec601f 2569
0d72e7d0 2570#if LIBAVCODEC_VERSION_MAJOR < 53
b1ec601f 2571 /**
85947156
VS
2572 * Decoder should decode to this many channels if it can (0 for default)
2573 * - encoding: unused
2574 * - decoding: Set by user.
0d72e7d0 2575 * @deprecated Deprecated in favor of request_channel_layout.
b1ec601f
RD
2576 */
2577 int request_channels;
0d72e7d0 2578#endif
1408352a
JR
2579
2580 /**
2581 * Percentage of dynamic range compression to be applied by the decoder.
2582 * The default value is 1.0, corresponding to full compression.
2583 * - encoding: unused
2584 * - decoding: Set by user.
2585 */
2586 float drc_scale;
79de84f2
MN
2587
2588 /**
2589 * opaque 64bit number (generally a PTS) that will be reordered and
2590 * output in AVFrame.reordered_opaque
81c623fa 2591 * @deprecated in favor of pkt_pts
79de84f2
MN
2592 * - encoding: unused
2593 * - decoding: Set by user.
2594 */
2595 int64_t reordered_opaque;
312420f3
PR
2596
2597 /**
2598 * Bits per sample/pixel of internal libavcodec pixel/sample format.
5d6e4c16 2599 * This field is applicable only when sample_fmt is AV_SAMPLE_FMT_S32.
312420f3
PR
2600 * - encoding: set by user.
2601 * - decoding: set by libavcodec.
2602 */
2603 int bits_per_raw_sample;
0d72e7d0
PR
2604
2605 /**
2606 * Audio channel layout.
2607 * - encoding: set by user.
2608 * - decoding: set by libavcodec.
2609 */
2610 int64_t channel_layout;
2611
2612 /**
2613 * Request decoder to use this channel layout if it can (0 for default)
2614 * - encoding: unused
2615 * - decoding: Set by user.
2616 */
2617 int64_t request_channel_layout;
3bff4d8b
BC
2618
2619 /**
2620 * Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow.
2621 * - encoding: Set by user.
2622 * - decoding: unused.
2623 */
2624 float rc_max_available_vbv_use;
2625
2626 /**
2627 * Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow.
2628 * - encoding: Set by user.
2629 * - decoding: unused.
2630 */
2631 float rc_min_vbv_overflow_use;
40e5d31b
GB
2632
2633 /**
2634 * Hardware accelerator in use
2635 * - encoding: unused.
2636 * - decoding: Set by libavcodec
2637 */
2638 struct AVHWAccel *hwaccel;
3797c74b
MN
2639
2640 /**
2641 * For some codecs, the time base is closer to the field rate than the frame rate.
2642 * Most notably, H.264 and MPEG-2 specify time_base as half of frame duration
2643 * if no telecine is used ...
2644 *
2645 * Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2.
2646 */
2647 int ticks_per_frame;
1aea7018
GB
2648
2649 /**
2650 * Hardware accelerator context.
2651 * For some hardware accelerators, a global context needs to be
2652 * provided by the user. In that case, this holds display-dependent
2653 * data FFmpeg cannot instantiate itself. Please refer to the
2654 * FFmpeg HW accelerator documentation to know how to fill this
2655 * is. e.g. for VA API, this is a struct vaapi_context.
2656 * - encoding: unused
2657 * - decoding: Set by user
2658 */
2659 void *hwaccel_context;
4ee6a5c1
MN
2660
2661 /**
2662 * Chromaticity coordinates of the source primaries.
2663 * - encoding: Set by user
2664 * - decoding: Set by libavcodec
2665 */
2666 enum AVColorPrimaries color_primaries;
2667
2668 /**
2669 * Color Transfer Characteristic.
2670 * - encoding: Set by user
2671 * - decoding: Set by libavcodec
2672 */
2673 enum AVColorTransferCharacteristic color_trc;
2674
2675 /**
2676 * YUV colorspace type.
2677 * - encoding: Set by user
2678 * - decoding: Set by libavcodec
2679 */
2680 enum AVColorSpace colorspace;
2681
2682 /**
2683 * MPEG vs JPEG YUV range.
2684 * - encoding: Set by user
2685 * - decoding: Set by libavcodec
2686 */
2687 enum AVColorRange color_range;
580a7465
DC
2688
2689 /**
2690 * This defines the location of chroma samples.
2691 * - encoding: Set by user
2692 * - decoding: Set by libavcodec
2693 */
8ea08bec 2694 enum AVChromaLocation chroma_sample_location;
8d23a86f
RD
2695
2696 /**
2697 * The codec may call this to execute several independent things.
2698 * It will return only after finishing all tasks.
2699 * The user may replace this with some multithreaded implementation,
2700 * the default implementation will execute the parts serially.
2701 * Also see avcodec_thread_init and e.g. the --enable-pthread configure option.
2702 * @param c context passed also to func
2703 * @param count the number of things to execute
2704 * @param arg2 argument passed unchanged to func
2705 * @param ret return values of executed functions, must have space for "count" values. May be NULL.
2706 * @param func function that will be called count times, with jobnr from 0 to count-1.
2707 * threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no
2708 * two instances of func executing at the same time will have the same threadnr.
2709 * @return always 0 currently, but code should handle a future improvement where when any call to func
2710 * returns < 0 no further calls to func may be done and < 0 is returned.
2711 * - encoding: Set by libavcodec, user can override.
2712 * - decoding: Set by libavcodec, user can override.
2713 */
2714 int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count);
096c87f6
JGG
2715
2716 /**
2717 * explicit P-frame weighted prediction analysis method
2718 * 0: off
2719 * 1: fast blind weighting (one reference duplicate with -1 offset)
2720 * 2: smart weighting (full fade detection analysis)
2721 * - encoding: Set by user.
2722 * - decoding: unused
2723 */
2724 int weighted_p_pred;
f3b3b489
BC
2725
2726 /**
2727 * AQ mode
2728 * 0: Disabled
2729 * 1: Variance AQ (complexity mask)
2730 * 2: Auto-variance AQ (experimental)
2731 * - encoding: Set by user
2732 * - decoding: unused
2733 */
2734 int aq_mode;
2735
2736 /**
2737 * AQ strength
2738 * Reduces blocking and blurring in flat and textured areas.
2739 * - encoding: Set by user
2740 * - decoding: unused
2741 */
2742 float aq_strength;
2743
2744 /**
2745 * PSY RD
2746 * Strength of psychovisual optimization
2747 * - encoding: Set by user
2748 * - decoding: unused
2749 */
2750 float psy_rd;
2751
2752 /**
2753 * PSY trellis
2754 * Strength of psychovisual optimization
2755 * - encoding: Set by user
2756 * - decoding: unused
2757 */
2758 float psy_trellis;
2759
2760 /**
2761 * RC lookahead
2762 * Number of frames for frametype and ratecontrol lookahead
2763 * - encoding: Set by user
2764 * - decoding: unused
2765 */
2766 int rc_lookahead;
e8c7fca9
JGG
2767
2768 /**
2769 * Constant rate factor maximum
2770 * With CRF encoding mode and VBV restrictions enabled, prevents quality from being worse
2771 * than crf_max, even if doing so would violate VBV restrictions.
2772 * - encoding: Set by user.
2773 * - decoding: unused
2774 */
2775 float crf_max;
fecd7b45
SS
2776
2777 int log_level_offset;
23940f14
JR
2778
2779 /**
2780 * Determines which LPC analysis algorithm to use.
2781 * - encoding: Set by user
2782 * - decoding: unused
2783 */
2784 enum AVLPCType lpc_type;
2785
2786 /**
2787 * Number of passes to use for Cholesky factorization during LPC analysis
2788 * - encoding: Set by user
2789 * - decoding: unused
2790 */
2791 int lpc_passes;
2aa72ecc
JZ
2792
2793 /**
2794 * Number of slices.
2795 * Indicates number of picture subdivisions. Used for parallelized
2796 * decoding.
2797 * - encoding: Set by user
2798 * - decoding: unused
2799 */
2800 int slices;
cb2c971d
AJ
2801
2802 /**
2803 * Header containing style information for text subtitles.
2804 * For SUBTITLE_ASS subtitle type, it should contain the whole ASS
2805 * [Script Info] and [V4+ Styles] section, plus the [Events] line and
2806 * the Format line following. It shouldn't include any Dialogue line.
2807 * - encoding: Set/allocated/freed by user (before avcodec_open())
2808 * - decoding: Set/allocated/freed by libavcodec (by avcodec_open())
2809 */
2810 uint8_t *subtitle_header;
2811 int subtitle_header_size;
393cbb96
MN
2812
2813 /**
2814 * Current packet as passed into the decoder, to avoid having
2815 * to pass the packet into every function. Currently only valid
2816 * inside lavc and get/release_buffer callbacks.
2817 * - decoding: set by avcodec_decode_*, read by get_buffer() for setting pkt_pts
2818 * - encoding: unused
2819 */
2820 AVPacket *pkt;
37b00b47
AS
2821
2822 /**
2823 * Whether this is a copy of the context which had init() called on it.
2824 * This is used by multithreading - shared tables and picture pointers
2825 * should be freed from the original context only.
2826 * - encoding: Set by libavcodec.
2827 * - decoding: Set by libavcodec.
2828 */
2829 int is_copy;
2830
2831 /**
2832 * Which multithreading methods to use.
2833 * Use of FF_THREAD_FRAME will increase decoding delay by one frame per thread,
2834 * so clients which cannot provide future frames should not use it.
2835 *
2836 * - encoding: Set by user, otherwise the default is used.
2837 * - decoding: Set by user, otherwise the default is used.
2838 */
2839 int thread_type;
2840#define FF_THREAD_FRAME 1 //< Decode more than one frame at once
2841#define FF_THREAD_SLICE 2 //< Decode more than one part of a single frame at once
2842
2843 /**
2844 * Which multithreading methods are in use by the codec.
2845 * - encoding: Set by libavcodec.
2846 * - decoding: Set by libavcodec.
2847 */
2848 int active_thread_type;
2849
2850 /**
2851 * Set by the client if its custom get_buffer() callback can be called
2852 * from another thread, which allows faster multithreaded decoding.
2853 * draw_horiz_band() will be called from other threads regardless of this setting.
2854 * Ignored if the default get_buffer() is used.
2855 * - encoding: Set by user.
2856 * - decoding: Set by user.
2857 */
2858 int thread_safe_callbacks;
55bad0c6
CM
2859
2860 /**
2861 * VBV delay coded in the last frame (in periods of a 27 MHz clock).
2862 * Used for compliant TS muxing.
2863 * - encoding: Set by libavcodec.
2864 * - decoding: unused.
2865 */
2866 uint64_t vbv_delay;
de6d9b64
FB
2867} AVCodecContext;
2868
64863965 2869/**
060ec0a8
AH
2870 * AVProfile.
2871 */
2872typedef struct AVProfile {
2873 int profile;
2874 const char *name; ///< short name for the profile
2875} AVProfile;
2876
2877/**
64863965
MN
2878 * AVCodec.
2879 */
de6d9b64 2880typedef struct AVCodec {
6b0cdb6e
NG
2881 /**
2882 * Name of the codec implementation.
2883 * The name is globally unique among encoders and among decoders (but an
2884 * encoder and a decoder can share the same name).
2885 * This is the primary way to find a codec from the user perspective.
2886 */
18f77016 2887 const char *name;
72415b2a 2888 enum AVMediaType type;
9297ddd3 2889 enum CodecID id;
de6d9b64
FB
2890 int priv_data_size;
2891 int (*init)(AVCodecContext *);
0c1a9eda 2892 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
de6d9b64 2893 int (*close)(AVCodecContext *);
7a00bbad 2894 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt);
a2d11246
MN
2895 /**
2896 * Codec capabilities.
2897 * see CODEC_CAP_*
2898 */
bf89e6b1 2899 int capabilities;
de6d9b64 2900 struct AVCodec *next;
c8cf325a
MN
2901 /**
2902 * Flush buffers.
2903 * Will be called when seeking
2904 */
7a06ff14 2905 void (*flush)(AVCodecContext *);
716e31ea 2906 const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0}
1beb670a 2907 const enum PixelFormat *pix_fmts; ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1
fe4bf374 2908 /**
bf7e799c
SS
2909 * Descriptive name for the codec, meant to be more human readable than name.
2910 * You should use the NULL_IF_CONFIG_SMALL() macro to define it.
fe4bf374
SS
2911 */
2912 const char *long_name;
3ade5d56 2913 const int *supported_samplerates; ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
5d6e4c16 2914 const enum AVSampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1
0d72e7d0 2915 const int64_t *channel_layouts; ///< array of support channel layouts, or NULL if unknown. array is terminated by 0
0fd0ef79 2916 uint8_t max_lowres; ///< maximum value for lowres supported by the decoder
655c36b2 2917 AVClass *priv_class; ///< AVClass for the private context
060ec0a8 2918 const AVProfile *profiles; ///< array of recognized profiles, or NULL if unknown, array is terminated by {FF_PROFILE_UNKNOWN}
37b00b47
AS
2919
2920 /**
2921 * @defgroup framethreading Frame-level threading support functions.
2922 * @{
2923 */
2924 /**
2925 * If defined, called on thread contexts when they are created.
2926 * If the codec allocates writable tables in init(), re-allocate them here.
2927 * priv_data will be set to a copy of the original.
2928 */
2929 int (*init_thread_copy)(AVCodecContext *);
2930 /**
2931 * Copy necessary context variables from a previous thread context to the current one.
2932 * If not defined, the next thread will start automatically; otherwise, the codec
2933 * must call ff_thread_finish_setup().
2934 *
2935 * dst and src will (rarely) point to the same context, in which case memcpy should be skipped.
2936 */
2937 int (*update_thread_context)(AVCodecContext *dst, const AVCodecContext *src);
2938 /** @} */
de6d9b64
FB
2939} AVCodec;
2940
97d96aaa 2941/**
40e5d31b
GB
2942 * AVHWAccel.
2943 */
2944typedef struct AVHWAccel {
2945 /**
2946 * Name of the hardware accelerated codec.
2947 * The name is globally unique among encoders and among decoders (but an
2948 * encoder and a decoder can share the same name).
2949 */
2950 const char *name;
2951
2952 /**
2953 * Type of codec implemented by the hardware accelerator.
2954 *
72415b2a 2955 * See AVMEDIA_TYPE_xxx
40e5d31b 2956 */
72415b2a 2957 enum AVMediaType type;
40e5d31b
GB
2958
2959 /**
2960 * Codec implemented by the hardware accelerator.
2961 *
2962 * See CODEC_ID_xxx
2963 */
2964 enum CodecID id;
2965
2966 /**
2967 * Supported pixel format.
2968 *
2969 * Only hardware accelerated formats are supported here.
2970 */
2971 enum PixelFormat pix_fmt;
2972
2973 /**
2974 * Hardware accelerated codec capabilities.
2975 * see FF_HWACCEL_CODEC_CAP_*
2976 */
2977 int capabilities;
2978
2979 struct AVHWAccel *next;
2980
2981 /**
2982 * Called at the beginning of each frame or field picture.
2983 *
2984 * Meaningful frame information (codec specific) is guaranteed to
2985 * be parsed at this point. This function is mandatory.
2986 *
bf7e799c 2987 * Note that buf can be NULL along with buf_size set to 0.
40e5d31b
GB
2988 * Otherwise, this means the whole frame is available at this point.
2989 *
2990 * @param avctx the codec context
2991 * @param buf the frame data buffer base
2992 * @param buf_size the size of the frame in bytes
2993 * @return zero if successful, a negative value otherwise
2994 */
2995 int (*start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
2996
2997 /**
2998 * Callback for each slice.
2999 *
3000 * Meaningful slice information (codec specific) is guaranteed to
3001 * be parsed at this point. This function is mandatory.
3002 *
3003 * @param avctx the codec context
3004 * @param buf the slice data buffer base
3005 * @param buf_size the size of the slice in bytes
3006 * @return zero if successful, a negative value otherwise
3007 */
3008 int (*decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
3009
3010 /**
3011 * Called at the end of each frame or field picture.
3012 *
3013 * The whole picture is parsed at this point and can now be sent
3014 * to the hardware accelerator. This function is mandatory.
3015 *
3016 * @param avctx the codec context
3017 * @return zero if successful, a negative value otherwise
3018 */
3019 int (*end_frame)(AVCodecContext *avctx);
68e5d523
GB
3020
3021 /**
3022 * Size of HW accelerator private data.
3023 *
cd823ff9
GB
3024 * Private data is allocated with av_mallocz() before
3025 * AVCodecContext.get_buffer() and deallocated after
3026 * AVCodecContext.release_buffer().
68e5d523
GB
3027 */
3028 int priv_data_size;
40e5d31b
GB
3029} AVHWAccel;
3030
3031/**
d7425f59
MN
3032 * four components are given, that's all.
3033 * the last component is alpha
3034 */
de6d9b64 3035typedef struct AVPicture {
0c1a9eda 3036 uint8_t *data[4];
cd394651 3037 int linesize[4]; ///< number of bytes per line
de6d9b64
FB
3038} AVPicture;
3039
eda7c983 3040#if FF_API_PALETTE_CONTROL
ba118447 3041/**
85947156
VS
3042 * AVPaletteControl
3043 * This structure defines a method for communicating palette changes
3044 * between and demuxer and a decoder.
3045 *
671adb17 3046 * @deprecated Use AVPacket to send palette changes instead.
85947156 3047 * This is totally broken.
ba118447 3048 */
2e99641b 3049#define AVPALETTE_SIZE 1024
432d84c3 3050#define AVPALETTE_COUNT 256
ba118447
MM
3051typedef struct AVPaletteControl {
3052
f5bccd85
DB
3053 /* Demuxer sets this to 1 to indicate the palette has changed;
3054 * decoder resets to 0. */
ba118447
MM
3055 int palette_changed;
3056
2a2bbcb0
MM
3057 /* 4-byte ARGB palette entries, stored in native byte order; note that
3058 * the individual palette components should be on a 8-bit scale; if
f5bccd85
DB
3059 * the palette data comes from an IBM VGA native format, the component
3060 * data is probably 6 bits in size and needs to be scaled. */
2e99641b 3061 unsigned int palette[AVPALETTE_COUNT];
ba118447 3062
18239edf 3063} AVPaletteControl attribute_deprecated;
2bbd8571 3064#endif
ba118447 3065
c66216ed
MN
3066enum AVSubtitleType {
3067 SUBTITLE_NONE,
3068
3069 SUBTITLE_BITMAP, ///< A bitmap, pict will be set
3070
3071 /**
3072 * Plain text, the text field must be set by the decoder and is
3073 * authoritative. ass and pict fields may contain approximations.
3074 */
3075 SUBTITLE_TEXT,
3076
3077 /**
3078 * Formatted text, the ass field must be set by the decoder and is
3079 * authoritative. pict and text fields may contain approximations.
3080 */
3081 SUBTITLE_ASS,
3082};
3083
c6ec28b1 3084typedef struct AVSubtitleRect {
ebc466bb
MN
3085 int x; ///< top left corner of pict, undefined when pict is not set
3086 int y; ///< top left corner of pict, undefined when pict is not set
3087 int w; ///< width of pict, undefined when pict is not set
3088 int h; ///< height of pict, undefined when pict is not set
3089 int nb_colors; ///< number of colors in pict, undefined when pict is not set
25b4c651
MN
3090
3091 /**
3092 * data+linesize for the bitmap of this subtitle.
3093 * can be set for text/ass as well once they where rendered
3094 */
3095 AVPicture pict;
f656106f
MN
3096 enum AVSubtitleType type;
3097
3098 char *text; ///< 0 terminated plain UTF-8 text
3099
3100 /**
3101 * 0 terminated ASS/SSA compatible event line.
3102 * The pressentation of this is unaffected by the other values in this
3103 * struct.
3104 */
3105 char *ass;
c6ec28b1
MN
3106} AVSubtitleRect;
3107
3108typedef struct AVSubtitle {
3109 uint16_t format; /* 0 = graphics */
3110 uint32_t start_display_time; /* relative to packet pts, in ms */
3111 uint32_t end_display_time; /* relative to packet pts, in ms */
ebc466bb 3112 unsigned num_rects;
db4fac64 3113 AVSubtitleRect **rects;
4bbe788a 3114 int64_t pts; ///< Same as packet pts, in AV_TIME_BASE
240c1657
FB
3115} AVSubtitle;
3116
cdd8930e
TB
3117/* packet functions */
3118
80d403fc
RD
3119/**
3120 * @deprecated use NULL instead
3121 */
3122attribute_deprecated void av_destruct_packet_nofree(AVPacket *pkt);
cdd8930e
TB
3123
3124/**
3125 * Default packet destructor.
3126 */
3127void av_destruct_packet(AVPacket *pkt);
3128
3129/**
3130 * Initialize optional fields of a packet with default values.
3131 *
3132 * @param pkt packet
3133 */
3134void av_init_packet(AVPacket *pkt);
3135
3136/**
3137 * Allocate the payload of a packet and initialize its fields with
3138 * default values.
3139 *
3140 * @param pkt packet
3141 * @param size wanted payload size
3142 * @return 0 if OK, AVERROR_xxx otherwise
3143 */
3144int av_new_packet(AVPacket *pkt, int size);
3145
3146/**
feb993e5
RD
3147 * Reduce packet size, correctly zeroing padding
3148 *
3149 * @param pkt packet
3150 * @param size new size
3151 */
3152void av_shrink_packet(AVPacket *pkt, int size);
3153
3154/**
a08d918e
RD
3155 * Increase packet size, correctly zeroing padding
3156 *
3157 * @param pkt packet
3158 * @param grow_by number of bytes by which to increase the size of the packet
3159 */
3160int av_grow_packet(AVPacket *pkt, int grow_by);
3161
3162/**
cdd8930e
TB
3163 * @warning This is a hack - the packet memory allocation stuff is broken. The
3164 * packet is allocated if it was not really allocated.
3165 */
3166int av_dup_packet(AVPacket *pkt);
3167
3168/**
3169 * Free a packet.
3170 *
3171 * @param pkt packet to free
3172 */
ce1d9c85 3173void av_free_packet(AVPacket *pkt);
240c1657 3174
de6d9b64
FB
3175/* resample.c */
3176
3177struct ReSampleContext;
aaaf1635 3178struct AVResampleContext;
de6d9b64
FB
3179
3180typedef struct ReSampleContext ReSampleContext;
3181
a377cfa6 3182#if FF_API_AUDIO_OLD
d1e3c6fd
BC