Indeo 5 decoder
[libav.git] / libavcodec / avcodec.h
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1/*
2 * copyright (c) 2001 Fabrice Bellard
3 *
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4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
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7 * modify it under the terms of the GNU Lesser General Public
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 *
b78e7197 11 * FFmpeg is distributed in the hope that it will be useful,
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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
b78e7197 17 * License along with FFmpeg; 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/**
bad5537e 25 * @file libavcodec/avcodec.h
f5bccd85 26 * external API header
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27 */
28
c60208e7 29#include <errno.h>
76a448ed 30#include "libavutil/avutil.h"
de6d9b64 31
dd1c8f3e 32#define LIBAVCODEC_VERSION_MAJOR 52
5bebe94d 33#define LIBAVCODEC_VERSION_MINOR 53
5aea268d 34#define LIBAVCODEC_VERSION_MICRO 0
e97ac1e6 35
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36#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
37 LIBAVCODEC_VERSION_MINOR, \
38 LIBAVCODEC_VERSION_MICRO)
39#define LIBAVCODEC_VERSION AV_VERSION(LIBAVCODEC_VERSION_MAJOR, \
40 LIBAVCODEC_VERSION_MINOR, \
41 LIBAVCODEC_VERSION_MICRO)
bb270c08 42#define LIBAVCODEC_BUILD LIBAVCODEC_VERSION_INT
5aa083ee 43
bb270c08 44#define LIBAVCODEC_IDENT "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
ce2749d2 45
8da9266c 46#define AV_NOPTS_VALUE INT64_C(0x8000000000000000)
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47#define AV_TIME_BASE 1000000
48#define AV_TIME_BASE_Q (AVRational){1, AV_TIME_BASE}
9740beff 49
7ebf5927 50/**
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51 * Identifies the syntax and semantics of the bitstream.
52 * The principle is roughly:
53 * Two decoders with the same ID can decode the same streams.
54 * Two encoders with the same ID can encode compatible streams.
55 * There may be slight deviations from the principle due to implementation
56 * details.
7ebf5927 57 *
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58 * If you add a codec ID to this list, add it so that
59 * 1. no value of a existing codec ID changes (that would break ABI),
60 * 2. it is as close as possible to similar codecs.
7ebf5927 61 */
de6d9b64 62enum CodecID {
115329f1 63 CODEC_ID_NONE,
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64
65 /* video codecs */
de6d9b64 66 CODEC_ID_MPEG1VIDEO,
0e373b95 67 CODEC_ID_MPEG2VIDEO, ///< preferred ID for MPEG-1/2 video decoding
fb364ada 68 CODEC_ID_MPEG2VIDEO_XVMC,
c6148de2 69 CODEC_ID_H261,
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70 CODEC_ID_H263,
71 CODEC_ID_RV10,
68b94c35 72 CODEC_ID_RV20,
de6d9b64 73 CODEC_ID_MJPEG,
b135d9fb 74 CODEC_ID_MJPEGB,
b1e6b355 75 CODEC_ID_LJPEG,
5e83dec4 76 CODEC_ID_SP5X,
5639729b 77 CODEC_ID_JPEGLS,
bf89e6b1 78 CODEC_ID_MPEG4,
de6d9b64 79 CODEC_ID_RAWVIDEO,
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80 CODEC_ID_MSMPEG4V1,
81 CODEC_ID_MSMPEG4V2,
82 CODEC_ID_MSMPEG4V3,
e1a9dbff 83 CODEC_ID_WMV1,
b50eef3a 84 CODEC_ID_WMV2,
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85 CODEC_ID_H263P,
86 CODEC_ID_H263I,
d4f5d74a 87 CODEC_ID_FLV1,
be8ffec9 88 CODEC_ID_SVQ1,
8b82a956 89 CODEC_ID_SVQ3,
020fcc94 90 CODEC_ID_DVVIDEO,
11f18faf 91 CODEC_ID_HUFFYUV,
f70f7c6d 92 CODEC_ID_CYUV,
0da71265 93 CODEC_ID_H264,
deabd4fd 94 CODEC_ID_INDEO3,
d86053a4 95 CODEC_ID_VP3,
f44ee2c3 96 CODEC_ID_THEORA,
3d2e8cce 97 CODEC_ID_ASV1,
9b56edf5 98 CODEC_ID_ASV2,
5e20f836 99 CODEC_ID_FFV1,
e2a7bb28 100 CODEC_ID_4XM,
be3564ed 101 CODEC_ID_VCR1,
3aff069b 102 CODEC_ID_CLJR,
c3bf0288 103 CODEC_ID_MDEC,
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104 CODEC_ID_ROQ,
105 CODEC_ID_INTERPLAY_VIDEO,
9937e686
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106 CODEC_ID_XAN_WC3,
107 CODEC_ID_XAN_WC4,
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108 CODEC_ID_RPZA,
109 CODEC_ID_CINEPAK,
110 CODEC_ID_WS_VQA,
111 CODEC_ID_MSRLE,
112 CODEC_ID_MSVIDEO1,
4120a53a 113 CODEC_ID_IDCIN,
1dc1ed99 114 CODEC_ID_8BPS,
11e29a41 115 CODEC_ID_SMC,
42cad81a 116 CODEC_ID_FLIC,
9a4117d5 117 CODEC_ID_TRUEMOTION1,
fafa0b75 118 CODEC_ID_VMDVIDEO,
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119 CODEC_ID_MSZH,
120 CODEC_ID_ZLIB,
070ed1bc 121 CODEC_ID_QTRLE,
791e7b83 122 CODEC_ID_SNOW,
9d53d58e 123 CODEC_ID_TSCC,
d0a0bbd2 124 CODEC_ID_ULTI,
d08d7142 125 CODEC_ID_QDRAW,
ab711b3c 126 CODEC_ID_VIXL,
acfd8f0f 127 CODEC_ID_QPEG,
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128 CODEC_ID_XVID,
129 CODEC_ID_PNG,
130 CODEC_ID_PPM,
131 CODEC_ID_PBM,
132 CODEC_ID_PGM,
133 CODEC_ID_PGMYUV,
134 CODEC_ID_PAM,
f37b9768 135 CODEC_ID_FFVHUFF,
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136 CODEC_ID_RV30,
137 CODEC_ID_RV40,
10b9c374 138 CODEC_ID_VC1,
21aa398f 139 CODEC_ID_WMV3,
9c7fb608 140 CODEC_ID_LOCO,
a8a15e9d 141 CODEC_ID_WNV1,
589f8220 142 CODEC_ID_AASC,
856dbbff 143 CODEC_ID_INDEO2,
b81f8949 144 CODEC_ID_FRAPS,
64af6168 145 CODEC_ID_TRUEMOTION2,
9fa62f2a 146 CODEC_ID_BMP,
e0f80bd7 147 CODEC_ID_CSCD,
4e114829 148 CODEC_ID_MMVIDEO,
9c8d8e84 149 CODEC_ID_ZMBV,
26376701 150 CODEC_ID_AVS,
348efc18 151 CODEC_ID_SMACKVIDEO,
dfca23e3 152 CODEC_ID_NUV,
fd7b1991 153 CODEC_ID_KMVC,
0919e788 154 CODEC_ID_FLASHSV,
20ffddb9 155 CODEC_ID_CAVS,
f31065f6 156 CODEC_ID_JPEG2000,
eb57c889 157 CODEC_ID_VMNC,
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158 CODEC_ID_VP5,
159 CODEC_ID_VP6,
160 CODEC_ID_VP6F,
3689cf16 161 CODEC_ID_TARGA,
72450e50 162 CODEC_ID_DSICINVIDEO,
29f86228 163 CODEC_ID_TIERTEXSEQVIDEO,
a991b1fe 164 CODEC_ID_TIFF,
06d392a7 165 CODEC_ID_GIF,
3edeab82 166 CODEC_ID_FFH264,
33a0dd37 167 CODEC_ID_DXA,
52b6bad2 168 CODEC_ID_DNXHD,
efb0c399 169 CODEC_ID_THP,
2d99eed1 170 CODEC_ID_SGI,
9a0ddd09 171 CODEC_ID_C93,
1e6c6759 172 CODEC_ID_BETHSOFTVID,
b46d68c6 173 CODEC_ID_PTX,
1ca779e7 174 CODEC_ID_TXD,
91fc2cf1 175 CODEC_ID_VP6A,
8787d837 176 CODEC_ID_AMV,
66f7679c 177 CODEC_ID_VB,
b4abe1d1 178 CODEC_ID_PCX,
d43df959 179 CODEC_ID_SUNRAST,
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180 CODEC_ID_INDEO4,
181 CODEC_ID_INDEO5,
a7129de5 182 CODEC_ID_MIMIC,
975cdc8f 183 CODEC_ID_RL2,
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184 CODEC_ID_8SVX_EXP,
185 CODEC_ID_8SVX_FIB,
40d26273 186 CODEC_ID_ESCAPE124,
782a58ec 187 CODEC_ID_DIRAC,
b64c096b 188 CODEC_ID_BFI,
495900f7 189 CODEC_ID_CMV,
974e0eee 190 CODEC_ID_MOTIONPIXELS,
cfc78718 191 CODEC_ID_TGV,
42b30357 192 CODEC_ID_TGQ,
d8964f3a 193 CODEC_ID_TQI,
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194 CODEC_ID_AURA,
195 CODEC_ID_AURA2,
97f92143 196 CODEC_ID_V210X,
a1fd2bc3 197 CODEC_ID_TMV,
ca0bb1c4 198 CODEC_ID_V210,
94d3d6a4 199 CODEC_ID_DPX,
c63ea92b 200 CODEC_ID_MAD,
d8b35b85 201 CODEC_ID_FRWU,
0aa6a518 202 CODEC_ID_FLASHSV2,
a3d995c1 203 CODEC_ID_CDGRAPHICS,
4aaab0a3 204 CODEC_ID_R210,
a1ae40fd 205 CODEC_ID_ANM,
4e5f42dd 206 CODEC_ID_BINKVIDEO,
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207 CODEC_ID_IFF_ILBM,
208 CODEC_ID_IFF_BYTERUN1,
a96b68b7 209
f5bccd85 210 /* various PCM "codecs" */
17179d2d 211 CODEC_ID_PCM_S16LE= 0x10000,
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212 CODEC_ID_PCM_S16BE,
213 CODEC_ID_PCM_U16LE,
214 CODEC_ID_PCM_U16BE,
215 CODEC_ID_PCM_S8,
216 CODEC_ID_PCM_U8,
217 CODEC_ID_PCM_MULAW,
218 CODEC_ID_PCM_ALAW,
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219 CODEC_ID_PCM_S32LE,
220 CODEC_ID_PCM_S32BE,
221 CODEC_ID_PCM_U32LE,
222 CODEC_ID_PCM_U32BE,
223 CODEC_ID_PCM_S24LE,
224 CODEC_ID_PCM_S24BE,
225 CODEC_ID_PCM_U24LE,
226 CODEC_ID_PCM_U24BE,
227 CODEC_ID_PCM_S24DAUD,
a11c2a2c 228 CODEC_ID_PCM_ZORK,
725d86bf 229 CODEC_ID_PCM_S16LE_PLANAR,
1472b7dd 230 CODEC_ID_PCM_DVD,
aa29709e 231 CODEC_ID_PCM_F32BE,
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232 CODEC_ID_PCM_F32LE,
233 CODEC_ID_PCM_F64BE,
234 CODEC_ID_PCM_F64LE,
5dd3707b 235 CODEC_ID_PCM_BLURAY,
0147f198 236
f5bccd85 237 /* various ADPCM codecs */
17179d2d 238 CODEC_ID_ADPCM_IMA_QT= 0x11000,
0147f198 239 CODEC_ID_ADPCM_IMA_WAV,
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240 CODEC_ID_ADPCM_IMA_DK3,
241 CODEC_ID_ADPCM_IMA_DK4,
2fdf638b 242 CODEC_ID_ADPCM_IMA_WS,
7d8379f2 243 CODEC_ID_ADPCM_IMA_SMJPEG,
0147f198 244 CODEC_ID_ADPCM_MS,
e2a7bb28 245 CODEC_ID_ADPCM_4XM,
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246 CODEC_ID_ADPCM_XA,
247 CODEC_ID_ADPCM_ADX,
7d8379f2 248 CODEC_ID_ADPCM_EA,
e5966052 249 CODEC_ID_ADPCM_G726,
b3bfb299 250 CODEC_ID_ADPCM_CT,
659c3692 251 CODEC_ID_ADPCM_SWF,
2ff4524e 252 CODEC_ID_ADPCM_YAMAHA,
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253 CODEC_ID_ADPCM_SBPRO_4,
254 CODEC_ID_ADPCM_SBPRO_3,
255 CODEC_ID_ADPCM_SBPRO_2,
d1e0d21f 256 CODEC_ID_ADPCM_THP,
3a7f5d07 257 CODEC_ID_ADPCM_IMA_AMV,
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258 CODEC_ID_ADPCM_EA_R1,
259 CODEC_ID_ADPCM_EA_R3,
260 CODEC_ID_ADPCM_EA_R2,
7bb65d89 261 CODEC_ID_ADPCM_IMA_EA_SEAD,
fac84d3c 262 CODEC_ID_ADPCM_IMA_EA_EACS,
271b4095 263 CODEC_ID_ADPCM_EA_XAS,
861c63a2 264 CODEC_ID_ADPCM_EA_MAXIS_XA,
055dc116 265 CODEC_ID_ADPCM_IMA_ISS,
891f64b3 266
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267 /* AMR */
268 CODEC_ID_AMR_NB= 0x12000,
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269 CODEC_ID_AMR_WB,
270
b8414bbd 271 /* RealAudio codecs*/
17179d2d 272 CODEC_ID_RA_144= 0x13000,
b8414bbd 273 CODEC_ID_RA_288,
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274
275 /* various DPCM codecs */
17179d2d 276 CODEC_ID_ROQ_DPCM= 0x14000,
3ef8be2b 277 CODEC_ID_INTERPLAY_DPCM,
9937e686 278 CODEC_ID_XAN_DPCM,
d08d7142 279 CODEC_ID_SOL_DPCM,
115329f1 280
ba0dabbf 281 /* audio codecs */
17179d2d 282 CODEC_ID_MP2= 0x15000,
0e373b95 283 CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3
17179d2d 284 CODEC_ID_AAC,
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285 CODEC_ID_AC3,
286 CODEC_ID_DTS,
287 CODEC_ID_VORBIS,
288 CODEC_ID_DVAUDIO,
289 CODEC_ID_WMAV1,
290 CODEC_ID_WMAV2,
291 CODEC_ID_MACE3,
292 CODEC_ID_MACE6,
293 CODEC_ID_VMDAUDIO,
294 CODEC_ID_SONIC,
295 CODEC_ID_SONIC_LS,
ac2570a8 296 CODEC_ID_FLAC,
1ede228a 297 CODEC_ID_MP3ADU,
d2a7718d 298 CODEC_ID_MP3ON4,
85ad5695 299 CODEC_ID_SHORTEN,
5df8a0c6 300 CODEC_ID_ALAC,
034eeaa1 301 CODEC_ID_WESTWOOD_SND1,
0e373b95 302 CODEC_ID_GSM, ///< as in Berlin toast format
d9b1c197 303 CODEC_ID_QDM2,
e0f7e329 304 CODEC_ID_COOK,
bf3027c8 305 CODEC_ID_TRUESPEECH,
a24c4a2a 306 CODEC_ID_TTA,
348efc18 307 CODEC_ID_SMACKAUDIO,
6c496518 308 CODEC_ID_QCELP,
730581f3 309 CODEC_ID_WAVPACK,
72450e50 310 CODEC_ID_DSICINAUDIO,
84ed36da 311 CODEC_ID_IMC,
185c7b6b 312 CODEC_ID_MUSEPACK7,
aad512b4 313 CODEC_ID_MLP,
f5bccd85 314 CODEC_ID_GSM_MS, /* as found in WAV */
10e26bc7 315 CODEC_ID_ATRAC3,
8950f828 316 CODEC_ID_VOXWARE,
bf4a1f17 317 CODEC_ID_APE,
636b13c5 318 CODEC_ID_NELLYMOSER,
12877faf 319 CODEC_ID_MUSEPACK8,
cb4ddf77 320 CODEC_ID_SPEEX,
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321 CODEC_ID_WMAVOICE,
322 CODEC_ID_WMAPRO,
800b9c24 323 CODEC_ID_WMALOSSLESS,
b339f0c6 324 CODEC_ID_ATRAC3P,
2988c93d 325 CODEC_ID_EAC3,
faeedbbb 326 CODEC_ID_SIPR,
7f507b2d 327 CODEC_ID_MP1,
616e899c 328 CODEC_ID_TWINVQ,
9ba4821d 329 CODEC_ID_TRUEHD,
b24bbbb4 330 CODEC_ID_MP4ALS,
223e8df1 331 CODEC_ID_ATRAC1,
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332 CODEC_ID_BINKAUDIO_RDFT,
333 CODEC_ID_BINKAUDIO_DCT,
115329f1 334
240c1657 335 /* subtitle codecs */
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336 CODEC_ID_DVD_SUBTITLE= 0x17000,
337 CODEC_ID_DVB_SUBTITLE,
0e373b95 338 CODEC_ID_TEXT, ///< raw UTF-8 text
7e2643ae 339 CODEC_ID_XSUB,
f9a9b350 340 CODEC_ID_SSA,
cc8c2c6a 341 CODEC_ID_MOV_TEXT,
c58b82a2 342 CODEC_ID_HDMV_PGS_SUBTITLE,
e58992e4 343 CODEC_ID_DVB_TELETEXT,
115329f1 344
7ce68923 345 /* other specific kind of codecs (generally used for attachments) */
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346 CODEC_ID_TTF= 0x18000,
347
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348 CODEC_ID_PROBE= 0x19000, ///< codec_id is not known (like CODEC_ID_NONE) but lavf should attempt to identify it
349
0e373b95 350 CODEC_ID_MPEG2TS= 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS
f5bccd85 351 * stream (only used by libavformat) */
de6d9b64 352};
dcedf586 353
de6d9b64 354enum CodecType {
4a663d80 355 CODEC_TYPE_UNKNOWN = -1,
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356 CODEC_TYPE_VIDEO,
357 CODEC_TYPE_AUDIO,
985180a1 358 CODEC_TYPE_DATA,
240c1657 359 CODEC_TYPE_SUBTITLE,
f8d7c9d3 360 CODEC_TYPE_ATTACHMENT,
9ff77d17 361 CODEC_TYPE_NB
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362};
363
0e373b95 364/**
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365 * all in native-endian format
366 */
a96b68b7 367enum SampleFormat {
9076fee4 368 SAMPLE_FMT_NONE = -1,
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369 SAMPLE_FMT_U8, ///< unsigned 8 bits
370 SAMPLE_FMT_S16, ///< signed 16 bits
115329f1 371 SAMPLE_FMT_S32, ///< signed 32 bits
a3a5f4d6 372 SAMPLE_FMT_FLT, ///< float
e06b00f3 373 SAMPLE_FMT_DBL, ///< double
88a07af7 374 SAMPLE_FMT_NB ///< Number of sample formats. DO NOT USE if dynamically linking to libavcodec
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375};
376
0d72e7d0 377/* Audio channel masks */
9d9b9d32
378#define CH_FRONT_LEFT 0x00000001
379#define CH_FRONT_RIGHT 0x00000002
380#define CH_FRONT_CENTER 0x00000004
381#define CH_LOW_FREQUENCY 0x00000008
382#define CH_BACK_LEFT 0x00000010
383#define CH_BACK_RIGHT 0x00000020
384#define CH_FRONT_LEFT_OF_CENTER 0x00000040
385#define CH_FRONT_RIGHT_OF_CENTER 0x00000080
386#define CH_BACK_CENTER 0x00000100
387#define CH_SIDE_LEFT 0x00000200
388#define CH_SIDE_RIGHT 0x00000400
389#define CH_TOP_CENTER 0x00000800
390#define CH_TOP_FRONT_LEFT 0x00001000
391#define CH_TOP_FRONT_CENTER 0x00002000
392#define CH_TOP_FRONT_RIGHT 0x00004000
393#define CH_TOP_BACK_LEFT 0x00008000
394#define CH_TOP_BACK_CENTER 0x00010000
395#define CH_TOP_BACK_RIGHT 0x00020000
396#define CH_STEREO_LEFT 0x20000000 ///< Stereo downmix.
397#define CH_STEREO_RIGHT 0x40000000 ///< See CH_STEREO_LEFT.
0d72e7d0 398
31557166
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399/** Channel mask value used for AVCodecContext.request_channel_layout
400 to indicate that the user requests the channel order of the decoder output
401 to be the native codec channel order. */
402#define CH_LAYOUT_NATIVE 0x8000000000000000LL
403
0d72e7d0 404/* Audio channel convenience macros */
9d9b9d32
405#define CH_LAYOUT_MONO (CH_FRONT_CENTER)
406#define CH_LAYOUT_STEREO (CH_FRONT_LEFT|CH_FRONT_RIGHT)
1b7bc4a2 407#define CH_LAYOUT_2_1 (CH_LAYOUT_STEREO|CH_BACK_CENTER)
9d9b9d32 408#define CH_LAYOUT_SURROUND (CH_LAYOUT_STEREO|CH_FRONT_CENTER)
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409#define CH_LAYOUT_4POINT0 (CH_LAYOUT_SURROUND|CH_BACK_CENTER)
410#define CH_LAYOUT_2_2 (CH_LAYOUT_STEREO|CH_SIDE_LEFT|CH_SIDE_RIGHT)
9d9b9d32
411#define CH_LAYOUT_QUAD (CH_LAYOUT_STEREO|CH_BACK_LEFT|CH_BACK_RIGHT)
412#define CH_LAYOUT_5POINT0 (CH_LAYOUT_SURROUND|CH_SIDE_LEFT|CH_SIDE_RIGHT)
413#define CH_LAYOUT_5POINT1 (CH_LAYOUT_5POINT0|CH_LOW_FREQUENCY)
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414#define CH_LAYOUT_5POINT0_BACK (CH_LAYOUT_SURROUND|CH_BACK_LEFT|CH_BACK_RIGHT)
415#define CH_LAYOUT_5POINT1_BACK (CH_LAYOUT_5POINT0_BACK|CH_LOW_FREQUENCY)
5dd3707b 416#define CH_LAYOUT_7POINT0 (CH_LAYOUT_5POINT0|CH_BACK_LEFT|CH_BACK_RIGHT)
9d9b9d32 417#define CH_LAYOUT_7POINT1 (CH_LAYOUT_5POINT1|CH_BACK_LEFT|CH_BACK_RIGHT)
8613af0a 418#define CH_LAYOUT_7POINT1_WIDE (CH_LAYOUT_5POINT1_BACK|\
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419 CH_FRONT_LEFT_OF_CENTER|CH_FRONT_RIGHT_OF_CENTER)
420#define CH_LAYOUT_STEREO_DOWNMIX (CH_STEREO_LEFT|CH_STEREO_RIGHT)
0d72e7d0 421
de6d9b64 422/* in bytes */
8170e5fb 423#define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
de6d9b64 424
d7425f59 425/**
cf713bb8 426 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
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DB
427 * This is mainly needed because some optimized bitstream readers read
428 * 32 or 64 bit at once and could read over the end.<br>
429 * Note: If the first 23 bits of the additional bytes are not 0, then damaged
430 * MPEG bitstreams could cause overread and segfault.
d7425f59
MN
431 */
432#define FF_INPUT_BUFFER_PADDING_SIZE 8
433
0ecca7a4 434/**
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435 * minimum encoding buffer size
436 * Used to avoid some checks during header writing.
0ecca7a4
MN
437 */
438#define FF_MIN_BUFFER_SIZE 16384
439
47146dfb 440
0e373b95 441/**
bafc102b 442 * motion estimation type.
0e373b95 443 */
e4986da9 444enum Motion_Est_ID {
9b4dd1b8 445 ME_ZERO = 1, ///< no search, that is use 0,0 vector whenever one is needed
e4986da9
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446 ME_FULL,
447 ME_LOG,
448 ME_PHODS,
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449 ME_EPZS, ///< enhanced predictive zonal search
450 ME_X1, ///< reserved for experiments
451 ME_HEX, ///< hexagon based search
452 ME_UMH, ///< uneven multi-hexagon search
453 ME_ITER, ///< iterative search
359bbdab 454 ME_TESA, ///< transformed exhaustive search algorithm
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J
455};
456
8c3eba7c 457enum AVDiscard{
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DB
458 /* We leave some space between them for extensions (drop some
459 * keyframes for intra-only or drop just some bidir frames). */
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MN
460 AVDISCARD_NONE =-16, ///< discard nothing
461 AVDISCARD_DEFAULT= 0, ///< discard useless packets like 0 size packets in avi
462 AVDISCARD_NONREF = 8, ///< discard all non reference
463 AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
464 AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
465 AVDISCARD_ALL = 48, ///< discard all
466};
467
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468enum AVColorPrimaries{
469 AVCOL_PRI_BT709 =1, ///< also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP177 Annex B
470 AVCOL_PRI_UNSPECIFIED=2,
471 AVCOL_PRI_BT470M =4,
472 AVCOL_PRI_BT470BG =5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM
473 AVCOL_PRI_SMPTE170M =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC
474 AVCOL_PRI_SMPTE240M =7, ///< functionally identical to above
475 AVCOL_PRI_FILM =8,
476 AVCOL_PRI_NB , ///< Not part of ABI
477};
478
479enum AVColorTransferCharacteristic{
480 AVCOL_TRC_BT709 =1, ///< also ITU-R BT1361
481 AVCOL_TRC_UNSPECIFIED=2,
482 AVCOL_TRC_GAMMA22 =4, ///< also ITU-R BT470M / ITU-R BT1700 625 PAL & SECAM
483 AVCOL_TRC_GAMMA28 =5, ///< also ITU-R BT470BG
484 AVCOL_TRC_NB , ///< Not part of ABI
485};
486
487enum AVColorSpace{
488 AVCOL_SPC_RGB =0,
489 AVCOL_SPC_BT709 =1, ///< also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
490 AVCOL_SPC_UNSPECIFIED=2,
491 AVCOL_SPC_FCC =4,
492 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
493 AVCOL_SPC_SMPTE170M =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC / functionally identical to above
494 AVCOL_SPC_SMPTE240M =7,
495 AVCOL_SPC_NB , ///< Not part of ABI
496};
497
498enum AVColorRange{
499 AVCOL_RANGE_UNSPECIFIED=0,
500 AVCOL_RANGE_MPEG =1, ///< the normal 219*2^(n-8) "MPEG" YUV ranges
501 AVCOL_RANGE_JPEG =2, ///< the normal 2^n-1 "JPEG" YUV ranges
502 AVCOL_RANGE_NB , ///< Not part of ABI
503};
504
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505/**
506 * X X 3 4 X X are luma samples,
507 * 1 2 1-6 are possible chroma positions
508 * X X 5 6 X 0 is undefined/unknown position
509 */
510enum AVChromaLocation{
511 AVCHROMA_LOC_UNSPECIFIED=0,
512 AVCHROMA_LOC_LEFT =1, ///< mpeg2/4, h264 default
513 AVCHROMA_LOC_CENTER =2, ///< mpeg1, jpeg, h263
514 AVCHROMA_LOC_TOPLEFT =3, ///< DV
515 AVCHROMA_LOC_TOP =4,
516 AVCHROMA_LOC_BOTTOMLEFT =5,
517 AVCHROMA_LOC_BOTTOM =6,
518 AVCHROMA_LOC_NB , ///< Not part of ABI
519};
520
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521typedef struct RcOverride{
522 int start_frame;
523 int end_frame;
f5bccd85 524 int qscale; // If this is 0 then quality_factor will be used instead.
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525 float quality_factor;
526} RcOverride;
527
b0ec9efd 528#define FF_MAX_B_FRAMES 16
9dbcbd92 529
a949d72e 530/* encoding support
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531 These flags can be passed in AVCodecContext.flags before initialization.
532 Note: Not everything is supported yet.
a949d72e 533*/
de6d9b64 534
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535#define CODEC_FLAG_QSCALE 0x0002 ///< Use fixed qscale.
536#define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / advanced prediction for H.263.
537#define CODEC_FLAG_QPEL 0x0010 ///< Use qpel MC.
538#define CODEC_FLAG_GMC 0x0020 ///< Use GMC.
539#define CODEC_FLAG_MV0 0x0040 ///< Always try a MB with MV=<0,0>.
540#define CODEC_FLAG_PART 0x0080 ///< Use data partitioning.
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541/**
542 * The parent program guarantees that the input for B-frames containing
f5bccd85 543 * streams is not written to for at least s->max_b_frames+1 frames, if
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544 * this is not set the input will be copied.
545 */
8b4c7dbc 546#define CODEC_FLAG_INPUT_PRESERVED 0x0100
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547#define CODEC_FLAG_PASS1 0x0200 ///< Use internal 2pass ratecontrol in first pass mode.
548#define CODEC_FLAG_PASS2 0x0400 ///< Use internal 2pass ratecontrol in second pass mode.
549#define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< Use external Huffman table (for MJPEG).
550#define CODEC_FLAG_GRAY 0x2000 ///< Only decode/encode grayscale.
551#define CODEC_FLAG_EMU_EDGE 0x4000 ///< Don't draw edges.
552#define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding.
553#define CODEC_FLAG_TRUNCATED 0x00010000 /** Input bitstream might be truncated at a random
554 location instead of only at frame boundaries. */
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555#define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< Normalize adaptive quantization.
556#define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT.
557#define CODEC_FLAG_LOW_DELAY 0x00080000 ///< Force low delay.
558#define CODEC_FLAG_ALT_SCAN 0x00100000 ///< Use alternate scan.
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559#define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< Place global headers in extradata instead of every keyframe.
560#define CODEC_FLAG_BITEXACT 0x00800000 ///< Use only bitexact stuff (except (I)DCT).
21e59552 561/* Fx : Flag for h263+ extra options */
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562#define CODEC_FLAG_AC_PRED 0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction
563#define CODEC_FLAG_H263P_UMV 0x02000000 ///< unlimited motion vector
564#define CODEC_FLAG_CBP_RD 0x04000000 ///< Use rate distortion optimization for cbp.
565#define CODEC_FLAG_QP_RD 0x08000000 ///< Use rate distortion optimization for qp selectioon.
566#define CODEC_FLAG_H263P_AIV 0x00000008 ///< H.263 alternative inter VLC
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567#define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
568#define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
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569#define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
570#define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
f5bccd85 571#define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< Will reserve space for SVCD scan offset user data.
f3eec1cf 572#define CODEC_FLAG_CLOSED_GOP 0x80000000
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573#define CODEC_FLAG2_FAST 0x00000001 ///< Allow non spec compliant speedup tricks.
574#define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< Strictly enforce GOP size.
575#define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< Skip bitstream encoding.
576#define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< Place global headers at every keyframe instead of in extradata.
577#define CODEC_FLAG2_BPYRAMID 0x00000010 ///< H.264 allow B-frames to be used as references.
578#define CODEC_FLAG2_WPRED 0x00000020 ///< H.264 weighted biprediction for B-frames
d3075ed5 579#define CODEC_FLAG2_MIXED_REFS 0x00000040 ///< H.264 one reference per partition, as opposed to one reference per macroblock
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580#define CODEC_FLAG2_8X8DCT 0x00000080 ///< H.264 high profile 8x8 transform
581#define CODEC_FLAG2_FASTPSKIP 0x00000100 ///< H.264 fast pskip
582#define CODEC_FLAG2_AUD 0x00000200 ///< H.264 access unit delimiters
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583#define CODEC_FLAG2_BRDO 0x00000400 ///< B-frame rate-distortion optimization
584#define CODEC_FLAG2_INTRA_VLC 0x00000800 ///< Use MPEG-2 intra VLC table.
585#define CODEC_FLAG2_MEMC_ONLY 0x00001000 ///< Only do ME/MC (I frames -> ref, P frame -> ME+MC).
586#define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format.
587#define CODEC_FLAG2_SKIP_RD 0x00004000 ///< RD optimal MB level residual skipping
588#define CODEC_FLAG2_CHUNKS 0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
589#define CODEC_FLAG2_NON_LINEAR_QUANT 0x00010000 ///< Use MPEG-2 nonlinear quantizer.
f1618fd9 590#define CODEC_FLAG2_BIT_RESERVOIR 0x00020000 ///< Use a bit reservoir when encoding if possible
25a42948 591#define CODEC_FLAG2_MBTREE 0x00040000 ///< Use macroblock tree ratecontrol (x264 only)
6fc5b059 592
21e59552 593/* Unsupported options :
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594 * Syntax Arithmetic coding (SAC)
595 * Reference Picture Selection
eafcac6a 596 * Independent Segment Decoding */
21e59552 597/* /Fx */
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598/* codec capabilities */
599
f5bccd85 600#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback.
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601/**
602 * Codec uses get_buffer() for allocating buffers.
603 * direct rendering method 1
604 */
605#define CODEC_CAP_DR1 0x0002
f5bccd85 606/* If 'parse_only' field is true, then avcodec_parse_frame() can be used. */
917e06c8 607#define CODEC_CAP_PARSE_ONLY 0x0004
d7425f59 608#define CODEC_CAP_TRUNCATED 0x0008
f5bccd85 609/* Codec can export data for HW decoding (XvMC). */
5e5c247a 610#define CODEC_CAP_HWACCEL 0x0010
115329f1 611/**
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612 * Codec has a nonzero delay and needs to be fed with NULL at the end to get the delayed data.
613 * If this is not set, the codec is guaranteed to never be fed with NULL data.
934982c4 614 */
6f824977 615#define CODEC_CAP_DELAY 0x0020
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616/**
617 * Codec can be fed a final frame with a smaller size.
618 * This can be used to prevent truncation of the last audio samples.
619 */
620#define CODEC_CAP_SMALL_LAST_FRAME 0x0040
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621/**
622 * Codec can export data for HW decoding (VDPAU).
623 */
624#define CODEC_CAP_HWACCEL_VDPAU 0x0080
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625/**
626 * Codec can output multiple frames per AVPacket
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627 * Normally demuxers return one frame at a time, demuxers which do not do
628 * are connected to a parser to split what they return into proper frames.
629 * This flag is reserved to the very rare category of codecs which have a
630 * bitstream that cannot be split into frames without timeconsuming
631 * operations like full decoding. Demuxers carring such bitstreams thus
632 * may return multiple frames in a packet. This has many disadvantages like
633 * prohibiting stream copy in many cases thus it should only be considered
634 * as a last resort.
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635 */
636#define CODEC_CAP_SUBFRAMES 0x0100
bf89e6b1 637
f5bccd85 638//The following defines may change, don't expect compatibility if you use them.
8d7ec294 639#define MB_TYPE_INTRA4x4 0x0001
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640#define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
641#define MB_TYPE_INTRA_PCM 0x0004 //FIXME H.264-specific
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642#define MB_TYPE_16x16 0x0008
643#define MB_TYPE_16x8 0x0010
644#define MB_TYPE_8x16 0x0020
645#define MB_TYPE_8x8 0x0040
646#define MB_TYPE_INTERLACED 0x0080
273b0cd3 647#define MB_TYPE_DIRECT2 0x0100 //FIXME
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648#define MB_TYPE_ACPRED 0x0200
649#define MB_TYPE_GMC 0x0400
650#define MB_TYPE_SKIP 0x0800
651#define MB_TYPE_P0L0 0x1000
652#define MB_TYPE_P1L0 0x2000
653#define MB_TYPE_P0L1 0x4000
654#define MB_TYPE_P1L1 0x8000
655#define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
656#define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
657#define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
658#define MB_TYPE_QUANT 0x00010000
659#define MB_TYPE_CBP 0x00020000
660//Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
661
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662/**
663 * Pan Scan area.
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664 * This specifies the area which should be displayed.
665 * Note there may be multiple such areas for one frame.
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666 */
667typedef struct AVPanScan{
668 /**
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669 * id
670 * - encoding: Set by user.
671 * - decoding: Set by libavcodec.
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672 */
673 int id;
674
675 /**
676 * width and height in 1/16 pel
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677 * - encoding: Set by user.
678 * - decoding: Set by libavcodec.
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679 */
680 int width;
681 int height;
682
683 /**
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684 * position of the top left corner in 1/16 pel for up to 3 fields/frames
685 * - encoding: Set by user.
686 * - decoding: Set by libavcodec.
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687 */
688 int16_t position[3][2];
689}AVPanScan;
690
492cd3a9 691#define FF_COMMON_FRAME \
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692 /**\
693 * pointer to the picture planes.\
f5bccd85 694 * This might be different from the first allocated byte\
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695 * - encoding: \
696 * - decoding: \
697 */\
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698 uint8_t *data[4];\
699 int linesize[4];\
700 /**\
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701 * pointer to the first allocated byte of the picture. Can be used in get_buffer/release_buffer.\
702 * This isn't used by libavcodec unless the default get/release_buffer() is used.\
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703 * - encoding: \
704 * - decoding: \
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705 */\
706 uint8_t *base[4];\
707 /**\
708 * 1 -> keyframe, 0-> not\
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709 * - encoding: Set by libavcodec.\
710 * - decoding: Set by libavcodec.\
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711 */\
712 int key_frame;\
713\
714 /**\
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715 * Picture type of the frame, see ?_TYPE below.\
716 * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
717 * - decoding: Set by libavcodec.\
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718 */\
719 int pict_type;\
720\
721 /**\
c0df9d75 722 * presentation timestamp in time_base units (time when frame should be shown to user)\
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723 * If AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed.\
724 * - encoding: MUST be set by user.\
725 * - decoding: Set by libavcodec.\
1e491e29 726 */\
be6784dc 727 int64_t pts;\
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728\
729 /**\
f5bccd85 730 * picture number in bitstream order\
64863965 731 * - encoding: set by\
f5bccd85 732 * - decoding: Set by libavcodec.\
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733 */\
734 int coded_picture_number;\
735 /**\
f5bccd85 736 * picture number in display order\
64863965 737 * - encoding: set by\
f5bccd85 738 * - decoding: Set by libavcodec.\
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739 */\
740 int display_picture_number;\
741\
742 /**\
158c7f05 743 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
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744 * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
745 * - decoding: Set by libavcodec.\
1e491e29 746 */\
158c7f05 747 int quality; \
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748\
749 /**\
750 * buffer age (1->was last buffer and dint change, 2->..., ...).\
f5bccd85 751 * Set to INT_MAX if the buffer has not been used yet.\
64863965 752 * - encoding: unused\
f5bccd85 753 * - decoding: MUST be set by get_buffer().\
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754 */\
755 int age;\
756\
757 /**\
758 * is this picture used as reference\
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759 * The values for this are the same as the MpegEncContext.picture_structure\
760 * variable, that is 1->top field, 2->bottom field, 3->frame/both fields.\
5fe2a515 761 * Set to 4 for delayed, non-reference frames.\
64863965 762 * - encoding: unused\
f5bccd85 763 * - decoding: Set by libavcodec. (before get_buffer() call)).\
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764 */\
765 int reference;\
766\
767 /**\
768 * QP table\
64863965 769 * - encoding: unused\
f5bccd85 770 * - decoding: Set by libavcodec.\
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771 */\
772 int8_t *qscale_table;\
773 /**\
774 * QP store stride\
64863965 775 * - encoding: unused\
f5bccd85 776 * - decoding: Set by libavcodec.\
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777 */\
778 int qstride;\
779\
780 /**\
f5bccd85 781 * mbskip_table[mb]>=1 if MB didn't change\
1e491e29 782 * stride= mb_width = (width+15)>>4\
64863965 783 * - encoding: unused\
f5bccd85 784 * - decoding: Set by libavcodec.\
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785 */\
786 uint8_t *mbskip_table;\
787\
788 /**\
f5bccd85 789 * motion vector table\
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790 * @code\
791 * example:\
792 * int mv_sample_log2= 4 - motion_subsample_log2;\
793 * int mb_width= (width+15)>>4;\
794 * int mv_stride= (mb_width << mv_sample_log2) + 1;\
795 * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
796 * @endcode\
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797 * - encoding: Set by user.\
798 * - decoding: Set by libavcodec.\
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799 */\
800 int16_t (*motion_val[2])[2];\
801\
802 /**\
f5bccd85 803 * macroblock type table\
8d7ec294 804 * mb_type_base + mb_width + 2\
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805 * - encoding: Set by user.\
806 * - decoding: Set by libavcodec.\
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807 */\
808 uint32_t *mb_type;\
809\
810 /**\
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811 * log2 of the size of the block which a single vector in motion_val represents: \
812 * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
8d7ec294 813 * - encoding: unused\
f5bccd85 814 * - decoding: Set by libavcodec.\
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815 */\
816 uint8_t motion_subsample_log2;\
817\
818 /**\
1e491e29 819 * for some private data of the user\
64863965 820 * - encoding: unused\
f5bccd85 821 * - decoding: Set by user.\
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822 */\
823 void *opaque;\
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824\
825 /**\
826 * error\
f5bccd85 827 * - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR.\
64863965 828 * - decoding: unused\
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829 */\
830 uint64_t error[4];\
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831\
832 /**\
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833 * type of the buffer (to keep track of who has to deallocate data[*])\
834 * - encoding: Set by the one who allocates it.\
835 * - decoding: Set by the one who allocates it.\
836 * Note: User allocated (direct rendering) & internal buffers cannot coexist currently.\
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837 */\
838 int type;\
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839 \
840 /**\
f5bccd85 841 * When decoding, this signals how much the picture must be delayed.\
2ec23b6d 842 * extra_delay = repeat_pict / (2*fps)\
64863965 843 * - encoding: unused\
f5bccd85 844 * - decoding: Set by libavcodec.\
2ec23b6d 845 */\
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846 int repeat_pict;\
847 \
848 /**\
849 * \
850 */\
851 int qscale_type;\
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852 \
853 /**\
854 * The content of the picture is interlaced.\
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855 * - encoding: Set by user.\
856 * - decoding: Set by libavcodec. (default 0)\
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857 */\
858 int interlaced_frame;\
859 \
860 /**\
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861 * If the content is interlaced, is top field displayed first.\
862 * - encoding: Set by user.\
863 * - decoding: Set by libavcodec.\
2744ca9a 864 */\
9dad924e 865 int top_field_first;\
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866 \
867 /**\
868 * Pan scan.\
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869 * - encoding: Set by user.\
870 * - decoding: Set by libavcodec.\
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871 */\
872 AVPanScan *pan_scan;\
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873 \
874 /**\
f5bccd85 875 * Tell user application that palette has changed from previous frame.\
2a2bbcb0 876 * - encoding: ??? (no palette-enabled encoder yet)\
f5bccd85 877 * - decoding: Set by libavcodec. (default 0).\
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878 */\
879 int palette_has_changed;\
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880 \
881 /**\
f5bccd85 882 * codec suggestion on buffer type if != 0\
074c4ca7 883 * - encoding: unused\
f5bccd85 884 * - decoding: Set by libavcodec. (before get_buffer() call)).\
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885 */\
886 int buffer_hints;\
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887\
888 /**\
f5bccd85 889 * DCT coefficients\
8289c6fa 890 * - encoding: unused\
f5bccd85 891 * - decoding: Set by libavcodec.\
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892 */\
893 short *dct_coeff;\
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894\
895 /**\
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896 * motion referece frame index\
897 * - encoding: Set by user.\
898 * - decoding: Set by libavcodec.\
a4d36c11 899 */\
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900 int8_t *ref_index[2];\
901\
902 /**\
903 * reordered opaque 64bit number (generally a PTS) from AVCodecContext.reordered_opaque\
904 * output in AVFrame.reordered_opaque\
905 * - encoding: unused\
906 * - decoding: Read by user.\
907 */\
908 int64_t reordered_opaque;\
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909\
910 /**\
911 * hardware accelerator private data (FFmpeg allocated)\
912 * - encoding: unused\
913 * - decoding: Set by libavcodec\
914 */\
952e2083 915 void *hwaccel_picture_private;\
79de84f2 916
2ec23b6d 917
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918#define FF_QSCALE_TYPE_MPEG1 0
919#define FF_QSCALE_TYPE_MPEG2 1
920#define FF_QSCALE_TYPE_H264 2
800274f8 921#define FF_QSCALE_TYPE_VP56 3
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922
923#define FF_BUFFER_TYPE_INTERNAL 1
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924#define FF_BUFFER_TYPE_USER 2 ///< direct rendering buffers (image is (de)allocated by user)
925#define FF_BUFFER_TYPE_SHARED 4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared.
926#define FF_BUFFER_TYPE_COPY 8 ///< Just a (modified) copy of some other buffer, don't deallocate anything.
4e00e76b 927
1e491e29 928
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929#define FF_I_TYPE 1 ///< Intra
930#define FF_P_TYPE 2 ///< Predicted
931#define FF_B_TYPE 3 ///< Bi-dir predicted
932#define FF_S_TYPE 4 ///< S(GMC)-VOP MPEG4
933#define FF_SI_TYPE 5 ///< Switching Intra
934#define FF_SP_TYPE 6 ///< Switching Predicted
48d533e6 935#define FF_BI_TYPE 7
1e491e29 936
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937#define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore).
938#define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer.
939#define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content.
940#define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update).
074c4ca7 941
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942typedef struct AVPacket {
943 /**
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RS
944 * Presentation timestamp in AVStream->time_base units; the time at which
945 * the decompressed packet will be presented to the user.
18c915ee
TB
946 * Can be AV_NOPTS_VALUE if it is not stored in the file.
947 * pts MUST be larger or equal to dts as presentation cannot happen before
948 * decompression, unless one wants to view hex dumps. Some formats misuse
949 * the terms dts and pts/cts to mean something different. Such timestamps
950 * must be converted to true pts/dts before they are stored in AVPacket.
951 */
952 int64_t pts;
953 /**
7b356d39
RS
954 * Decompression timestamp in AVStream->time_base units; the time at which
955 * the packet is decompressed.
18c915ee
TB
956 * Can be AV_NOPTS_VALUE if it is not stored in the file.
957 */
958 int64_t dts;
959 uint8_t *data;
960 int size;
961 int stream_index;
962 int flags;
963 /**
7b356d39 964 * Duration of this packet in AVStream->time_base units, 0 if unknown.
18c915ee
TB
965 * Equals next_pts - this_pts in presentation order.
966 */
967 int duration;
968 void (*destruct)(struct AVPacket *);
969 void *priv;
970 int64_t pos; ///< byte position in stream, -1 if unknown
971
972 /**
7b356d39 973 * Time difference in AVStream->time_base units from the pts of this
18c915ee
TB
974 * packet to the point at which the output from the decoder has converged
975 * independent from the availability of previous frames. That is, the
976 * frames are virtually identical no matter if decoding started from
977 * the very first frame or from this keyframe.
978 * Is AV_NOPTS_VALUE if unknown.
979 * This field is not the display duration of the current packet.
980 *
981 * The purpose of this field is to allow seeking in streams that have no
982 * keyframes in the conventional sense. It corresponds to the
983 * recovery point SEI in H.264 and match_time_delta in NUT. It is also
984 * essential for some types of subtitle streams to ensure that all
985 * subtitles are correctly displayed after seeking.
986 */
987 int64_t convergence_duration;
988} AVPacket;
8f3f2e06
RD
989#define AV_PKT_FLAG_KEY 0x0001
990#if LIBAVCODEC_VERSION_MAJOR < 53
991#define PKT_FLAG_KEY AV_PKT_FLAG_KEY
992#endif
18c915ee 993
0da71265
MN
994/**
995 * Audio Video Frame.
ba66ae94
MN
996 * New fields can be added to the end of FF_COMMON_FRAME with minor version
997 * bumps.
8bfb108b 998 * Removal, reordering and changes to existing fields require a major
ba66ae94
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999 * version bump. No fields should be added into AVFrame before or after
1000 * FF_COMMON_FRAME!
8bfb108b 1001 * sizeof(AVFrame) must not be used outside libav*.
0da71265 1002 */
492cd3a9
MN
1003typedef struct AVFrame {
1004 FF_COMMON_FRAME
1005} AVFrame;
1e491e29 1006
d33c949c 1007/**
252f17e2
MN
1008 * main external API structure.
1009 * New fields can be added to the end with minor version bumps.
8bfb108b 1010 * Removal, reordering and changes to existing fields require a major
252f17e2 1011 * version bump.
8bfb108b 1012 * sizeof(AVCodecContext) must not be used outside libav*.
d33c949c 1013 */
de6d9b64 1014typedef struct AVCodecContext {
b71901e6 1015 /**
f5bccd85 1016 * information on struct for av_log
bc874dae
MB
1017 * - set by avcodec_alloc_context
1018 */
d42a814e 1019 const AVClass *av_class;
bc874dae 1020 /**
f5bccd85
DB
1021 * the average bitrate
1022 * - encoding: Set by user; unused for constant quantizer encoding.
1023 * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.
b71901e6 1024 */
de6d9b64 1025 int bit_rate;
b71901e6
MN
1026
1027 /**
64863965 1028 * number of bits the bitstream is allowed to diverge from the reference.
b71901e6 1029 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
f5bccd85 1030 * - encoding: Set by user; unused for constant quantizer encoding.
64863965 1031 * - decoding: unused
b71901e6 1032 */
115329f1 1033 int bit_rate_tolerance;
b71901e6
MN
1034
1035 /**
64863965 1036 * CODEC_FLAG_*.
f5bccd85
DB
1037 * - encoding: Set by user.
1038 * - decoding: Set by user.
b71901e6 1039 */
de6d9b64 1040 int flags;
b71901e6
MN
1041
1042 /**
f5bccd85
DB
1043 * Some codecs need additional format info. It is stored here.
1044 * If any muxer uses this then ALL demuxers/parsers AND encoders for the
1045 * specific codec MUST set it correctly otherwise stream copy breaks.
1046 * In general use of this field by muxers is not recommanded.
1047 * - encoding: Set by libavcodec.
1048 * - decoding: Set by libavcodec. (FIXME: Is this OK?)
b71901e6
MN
1049 */
1050 int sub_id;
1051
1052 /**
f5bccd85 1053 * Motion estimation algorithm used for video coding.
58f7833e 1054 * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
89223ef6 1055 * 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific]
64863965
MN
1056 * - encoding: MUST be set by user.
1057 * - decoding: unused
b71901e6
MN
1058 */
1059 int me_method;
1060
1061 /**
f5bccd85
DB
1062 * some codecs need / can use extradata like Huffman tables.
1063 * mjpeg: Huffman tables
b71901e6 1064 * rv10: additional flags
b704e742 1065 * mpeg4: global headers (they can be in the bitstream or here)
f5bccd85
DB
1066 * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
1067 * than extradata_size to avoid prolems if it is read with the bitstream reader.
1068 * The bytewise contents of extradata must not depend on the architecture or CPU endianness.
1069 * - encoding: Set/allocated/freed by libavcodec.
1070 * - decoding: Set/allocated/freed by user.
b71901e6 1071 */
58f2a4b0 1072 uint8_t *extradata;
e84c31dc 1073 int extradata_size;
115329f1 1074
b71901e6 1075 /**
f5bccd85
DB
1076 * This is the fundamental unit of time (in seconds) in terms
1077 * of which frame timestamps are represented. For fixed-fps content,
5b28c8c3
MN
1078 * timebase should be 1/framerate and timestamp increments should be
1079 * identically 1.
f5bccd85
DB
1080 * - encoding: MUST be set by user.
1081 * - decoding: Set by libavcodec.
b71901e6 1082 */
c0df9d75 1083 AVRational time_base;
115329f1 1084
5b28c8c3 1085 /* video only */
14bea432 1086 /**
21adafec 1087 * picture width / height.
115329f1 1088 * - encoding: MUST be set by user.
f5bccd85
DB
1089 * - decoding: Set by libavcodec.
1090 * Note: For compatibility it is possible to set this instead of
1091 * coded_width/height before decoding.
b71901e6 1092 */
de6d9b64 1093 int width, height;
115329f1 1094
e769f053 1095#define FF_ASPECT_EXTENDED 15
b71901e6
MN
1096
1097 /**
f5bccd85
DB
1098 * the number of pictures in a group of pictures, or 0 for intra_only
1099 * - encoding: Set by user.
64863965 1100 * - decoding: unused
b71901e6
MN
1101 */
1102 int gop_size;
1103
1104 /**
f5bccd85
DB
1105 * Pixel format, see PIX_FMT_xxx.
1106 * - encoding: Set by user.
1107 * - decoding: Set by libavcodec.
b71901e6 1108 */
e4eadb4b 1109 enum PixelFormat pix_fmt;
115329f1 1110
bdfcbbed 1111 /**
f5bccd85 1112 * Frame rate emulation. If not zero, the lower layer (i.e. format handler)
bdfcbbed 1113 * has to read frames at native frame rate.
f5bccd85
DB
1114 * - encoding: Set by user.
1115 * - decoding: unused
bdfcbbed
MK
1116 */
1117 int rate_emu;
115329f1 1118
b71901e6 1119 /**
f5bccd85
DB
1120 * If non NULL, 'draw_horiz_band' is called by the libavcodec
1121 * decoder to draw a horizontal band. It improves cache usage. Not
b71901e6 1122 * all codecs can do that. You must check the codec capabilities
f5bccd85 1123 * beforehand.
24b1583a
IK
1124 * The function is also used by hardware acceleration APIs.
1125 * It is called at least once during frame decoding to pass
1126 * the data needed for hardware render.
1127 * In that mode instead of pixel data, AVFrame points to
1128 * a structure specific to the acceleration API. The application
1129 * reads the structure and can change some fields to indicate progress
1130 * or mark state.
64863965 1131 * - encoding: unused
f5bccd85 1132 * - decoding: Set by user.
3bb07d61
MN
1133 * @param height the height of the slice
1134 * @param y the y position of the slice
1135 * @param type 1->top field, 2->bottom field, 3->frame
1136 * @param offset offset into the AVFrame.data from which the slice should be read
b71901e6 1137 */
bf89e6b1 1138 void (*draw_horiz_band)(struct AVCodecContext *s,
da64ecc3 1139 const AVFrame *src, int offset[4],
3bb07d61 1140 int y, int type, int height);
bf89e6b1 1141
de6d9b64 1142 /* audio only */
f5bccd85 1143 int sample_rate; ///< samples per second
5fcc4a23 1144 int channels; ///< number of audio channels
a3a5f4d6
MN
1145
1146 /**
f5bccd85
DB
1147 * audio sample format
1148 * - encoding: Set by user.
1149 * - decoding: Set by libavcodec.
a3a5f4d6 1150 */
ce9dd8f5 1151 enum SampleFormat sample_fmt; ///< sample format
de6d9b64 1152
f5bccd85 1153 /* The following data should not be initialized. */
718b27a7 1154 /**
f5bccd85 1155 * Samples per packet, initialized when calling 'init'.
718b27a7
MN
1156 */
1157 int frame_size;
115329f1 1158 int frame_number; ///< audio or video frame number
c0601d70 1159#if LIBAVCODEC_VERSION_MAJOR < 53
f5bccd85 1160 int real_pict_num; ///< Returns the real picture number of previous encoded frame.
c0601d70 1161#endif
115329f1 1162
b71901e6 1163 /**
f5bccd85 1164 * Number of frames the decoded output will be delayed relative to
64863965 1165 * the encoded input.
f5bccd85 1166 * - encoding: Set by libavcodec.
64863965 1167 * - decoding: unused
b71901e6
MN
1168 */
1169 int delay;
115329f1 1170
64863965
MN
1171 /* - encoding parameters */
1172 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
115329f1
DB
1173 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
1174
b71901e6 1175 /**
f5bccd85
DB
1176 * minimum quantizer
1177 * - encoding: Set by user.
64863965 1178 * - decoding: unused
b71901e6
MN
1179 */
1180 int qmin;
1181
1182 /**
f5bccd85
DB
1183 * maximum quantizer
1184 * - encoding: Set by user.
64863965 1185 * - decoding: unused
b71901e6
MN
1186 */
1187 int qmax;
1188
1189 /**
f5bccd85
DB
1190 * maximum quantizer difference between frames
1191 * - encoding: Set by user.
64863965 1192 * - decoding: unused
b71901e6
MN
1193 */
1194 int max_qdiff;
1195
1196 /**
f5bccd85
DB
1197 * maximum number of B-frames between non-B-frames
1198 * Note: The output will be delayed by max_b_frames+1 relative to the input.
1199 * - encoding: Set by user.
64863965 1200 * - decoding: unused
b71901e6
MN
1201 */
1202 int max_b_frames;
1203
1204 /**
f5bccd85 1205 * qscale factor between IP and B-frames
662e5411 1206 * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
1207 * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
f5bccd85 1208 * - encoding: Set by user.
64863965 1209 * - decoding: unused
b71901e6
MN
1210 */
1211 float b_quant_factor;
115329f1 1212
b71901e6
MN
1213 /** obsolete FIXME remove */
1214 int rc_strategy;
64b7c5b6
MN
1215#define FF_RC_STRATEGY_XVID 1
1216
8b4c7dbc 1217 int b_frame_strategy;
9dbcbd92 1218
b71901e6 1219 /**
85947156
VS
1220 * hurry up amount
1221 * - encoding: unused
1222 * - decoding: Set by user. 1-> Skip B-frames, 2-> Skip IDCT/dequant too, 5-> Skip everything except header
f9ec0aa1 1223 * @deprecated Deprecated in favor of skip_idct and skip_frame.
b71901e6
MN
1224 */
1225 int hurry_up;
115329f1 1226
de6d9b64 1227 struct AVCodec *codec;
115329f1 1228
de6d9b64
FB
1229 void *priv_data;
1230
bb628dae 1231 int rtp_payload_size; /* The size of the RTP payload: the coder will */
f5bccd85 1232 /* do its best to deliver a chunk with size */
644d98a4 1233 /* below rtp_payload_size, the chunk will start */
f5bccd85 1234 /* with a start code on some codecs like H.263. */
644d98a4 1235 /* This doesn't take account of any particular */
f5bccd85 1236 /* headers inside the transmitted RTP payload. */
81401c1f 1237
115329f1 1238
f5bccd85
DB
1239 /* The RTP callback: This function is called */
1240 /* every time the encoder has a packet to send. */
1241 /* It depends on the encoder if the data starts */
1242 /* with a Start Code (it should). H.263 does. */
1243 /* mb_nb contains the number of macroblocks */
1244 /* encoded in the RTP payload. */
115329f1 1245 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
81401c1f 1246
098eefe1
MN
1247 /* statistics, used for 2-pass encoding */
1248 int mv_bits;
1249 int header_bits;
1250 int i_tex_bits;
1251 int p_tex_bits;
1252 int i_count;
1253 int p_count;
1254 int skip_count;
b71901e6 1255 int misc_bits;
115329f1 1256
b71901e6 1257 /**
f5bccd85
DB
1258 * number of bits used for the previously encoded frame
1259 * - encoding: Set by libavcodec.
7004ffb3 1260 * - decoding: unused
b71901e6 1261 */
098eefe1 1262 int frame_bits;
7004ffb3 1263
b71901e6 1264 /**
f5bccd85
DB
1265 * Private data of the user, can be used to carry app specific stuff.
1266 * - encoding: Set by user.
1267 * - decoding: Set by user.
b71901e6
MN
1268 */
1269 void *opaque;
1270
de6d9b64 1271 char codec_name[32];
4a663d80
PG
1272 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
1273 enum CodecID codec_id; /* see CODEC_ID_xxx */
115329f1 1274
7004ffb3
MN
1275 /**
1276 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
f5bccd85
DB
1277 * This is used to work around some encoder bugs.
1278 * A demuxer should set this to what is stored in the field used to identify the codec.
1279 * If there are multiple such fields in a container then the demuxer should choose the one
1280 * which maximizes the information about the used codec.
1281 * If the codec tag field in a container is larger then 32 bits then the demuxer should
1282 * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
47bbf8a7 1283 * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
f5bccd85
DB
1284 * first.
1285 * - encoding: Set by user, if not then the default based on codec_id will be used.
1286 * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
7004ffb3
MN
1287 */
1288 unsigned int codec_tag;
115329f1 1289
b71901e6 1290 /**
f5bccd85
DB
1291 * Work around bugs in encoders which sometimes cannot be detected automatically.
1292 * - encoding: Set by user
1293 * - decoding: Set by user
b71901e6
MN
1294 */
1295 int workaround_bugs;
64863965 1296#define FF_BUG_AUTODETECT 1 ///< autodetection
4d2858de
MN
1297#define FF_BUG_OLD_MSMPEG4 2
1298#define FF_BUG_XVID_ILACE 4
1299#define FF_BUG_UMP4 8
1300#define FF_BUG_NO_PADDING 16
3116cb14 1301#define FF_BUG_AMV 32
f5bccd85 1302#define FF_BUG_AC_VLC 0 ///< Will be removed, libavcodec can now handle these non-compliant files by default.
03e93d35 1303#define FF_BUG_QPEL_CHROMA 64
db794953 1304#define FF_BUG_STD_QPEL 128
36df8805 1305#define FF_BUG_QPEL_CHROMA2 256
c40c3482 1306#define FF_BUG_DIRECT_BLOCKSIZE 512
1c6dcb0f 1307#define FF_BUG_EDGE 1024
b44bdf7e 1308#define FF_BUG_HPEL_CHROMA 2048
4ccde216 1309#define FF_BUG_DC_CLIP 4096
f5bccd85
DB
1310#define FF_BUG_MS 8192 ///< Work around various bugs in Microsoft's broken decoders.
1311//#define FF_BUG_FAKE_SCALABILITY 16 //Autodetection should work 100%.
115329f1 1312
b71901e6 1313 /**
f5bccd85
DB
1314 * luma single coefficient elimination threshold
1315 * - encoding: Set by user.
64863965 1316 * - decoding: unused
b71901e6 1317 */
1f6b6e50 1318 int luma_elim_threshold;
115329f1 1319
b71901e6 1320 /**
f5bccd85
DB
1321 * chroma single coeff elimination threshold
1322 * - encoding: Set by user.
64863965 1323 * - decoding: unused
b71901e6 1324 */
1f6b6e50 1325 int chroma_elim_threshold;
115329f1 1326
b71901e6 1327 /**
f5bccd85
DB
1328 * strictly follow the standard (MPEG4, ...).
1329 * - encoding: Set by user.
5771b2c3
MN
1330 * - decoding: Set by user.
1331 * Setting this to STRICT or higher means the encoder and decoder will
1332 * generally do stupid things. While setting it to inofficial or lower
1333 * will mean the encoder might use things that are not supported by all
1334 * spec compliant decoders. Decoders make no difference between normal,
1335 * inofficial and experimental, that is they always try to decode things
1336 * when they can unless they are explicitly asked to behave stupid
1337 * (=strictly conform to the specs)
b71901e6
MN
1338 */
1339 int strict_std_compliance;
f5bccd85
DB
1340#define FF_COMPLIANCE_VERY_STRICT 2 ///< Strictly conform to a older more strict version of the spec or reference software.
1341#define FF_COMPLIANCE_STRICT 1 ///< Strictly conform to all the things in the spec no matter what consequences.
9cd81798 1342#define FF_COMPLIANCE_NORMAL 0
f5bccd85
DB
1343#define FF_COMPLIANCE_INOFFICIAL -1 ///< Allow inofficial extensions.
1344#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
9cd81798 1345
b71901e6 1346 /**
f5bccd85 1347 * qscale offset between IP and B-frames
f5bccd85 1348 * - encoding: Set by user.
64863965 1349 * - decoding: unused
b71901e6
MN
1350 */
1351 float b_quant_offset;
115329f1 1352
b71901e6 1353 /**
047599a4 1354 * Error recognization; higher values will detect more errors but may
f5bccd85 1355 * misdetect some more or less valid parts as errors.
64863965 1356 * - encoding: unused
f5bccd85 1357 * - decoding: Set by user.
b71901e6 1358 */
047599a4 1359 int error_recognition;
1471c6c2 1360#define FF_ER_CAREFUL 1
ce3bcaed
MN
1361#define FF_ER_COMPLIANT 2
1362#define FF_ER_AGGRESSIVE 3
1363#define FF_ER_VERY_AGGRESSIVE 4
115329f1 1364
6b72ac63 1365 /**
f5bccd85
DB
1366 * Called at the beginning of each frame to get a buffer for it.
1367 * If pic.reference is set then the frame will be read later by libavcodec.
2b5296d2 1368 * avcodec_align_dimensions() should be used to find the required width and
f5bccd85 1369 * height, as they normally need to be rounded up to the next multiple of 16.
f1b99cc6
MN
1370 * if CODEC_CAP_DR1 is not set then get_buffer() must call
1371 * avcodec_default_get_buffer() instead of providing buffers allocated by
1372 * some other means.
64863965 1373 * - encoding: unused
f5bccd85 1374 * - decoding: Set by libavcodec., user can override.
b71901e6 1375 */
492cd3a9 1376 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
115329f1 1377
b71901e6 1378 /**
69b192ac 1379 * Called to release buffers which were allocated with get_buffer.
f5bccd85
DB
1380 * A released buffer can be reused in get_buffer().
1381 * pic.data[*] must be set to NULL.
64863965 1382 * - encoding: unused
f5bccd85 1383 * - decoding: Set by libavcodec., user can override.
b71901e6 1384 */
492cd3a9 1385 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
0fd90455 1386
b71901e6 1387 /**
eb8a25c8 1388 * Size of the frame reordering buffer in the decoder.
2d7b0560 1389 * For MPEG-2 it is 1 IPB or 0 low delay IP.
f5bccd85
DB
1390 * - encoding: Set by libavcodec.
1391 * - decoding: Set by libavcodec.
b71901e6
MN
1392 */
1393 int has_b_frames;
718b27a7
MN
1394
1395 /**
1396 * number of bytes per packet if constant and known or 0
f5bccd85 1397 * Used by some WAV based audio codecs.
718b27a7
MN
1398 */
1399 int block_align;
115329f1 1400
f5bccd85 1401 int parse_only; /* - decoding only: If true, only parsing is done
917e06c8
FB
1402 (function avcodec_parse_frame()). The frame
1403 data is returned. Only MPEG codecs support this now. */
115329f1 1404
b71901e6 1405 /**
f5bccd85
DB
1406 * 0-> h263 quant 1-> mpeg quant
1407 * - encoding: Set by user.
64863965 1408 * - decoding: unused
b71901e6
MN
1409 */
1410 int mpeg_quant;
115329f1 1411
b71901e6 1412 /**
f5bccd85
DB
1413 * pass1 encoding statistics output buffer
1414 * - encoding: Set by libavcodec.
64863965 1415 * - decoding: unused
b71901e6 1416 */
64863965 1417 char *stats_out;
115329f1 1418
b71901e6 1419 /**
f5bccd85
DB
1420 * pass2 encoding statistics input buffer
1421 * Concatenated stuff from stats_out of pass1 should be placed here.
1422 * - encoding: Allocated/set/freed by user.
64863965 1423 * - decoding: unused
b71901e6
MN
1424 */
1425 char *stats_in;
115329f1 1426
b71901e6 1427 /**
f5bccd85
DB
1428 * ratecontrol qmin qmax limiting method
1429 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
1430 * - encoding: Set by user.
64863965 1431 * - decoding: unused
b71901e6 1432 */
ce980a95 1433 float rc_qsquish;
b71901e6 1434
ce980a95
MN
1435 float rc_qmod_amp;
1436 int rc_qmod_freq;
115329f1 1437
b71901e6 1438 /**
f5bccd85
DB
1439 * ratecontrol override, see RcOverride
1440 * - encoding: Allocated/set/freed by user.
64863965 1441 * - decoding: unused
b71901e6 1442 */
ce980a95
MN
1443 RcOverride *rc_override;
1444 int rc_override_count;
115329f1 1445
b71901e6 1446 /**
f5bccd85
DB
1447 * rate control equation
1448 * - encoding: Set by user
64863965 1449 * - decoding: unused
b71901e6 1450 */
6881b8e5 1451 const char *rc_eq;
115329f1 1452
b71901e6 1453 /**
f5bccd85
DB
1454 * maximum bitrate
1455 * - encoding: Set by user.
64863965 1456 * - decoding: unused
b71901e6 1457 */
ce980a95 1458 int rc_max_rate;
115329f1 1459
b71901e6 1460 /**
f5bccd85
DB
1461 * minimum bitrate
1462 * - encoding: Set by user.
64863965 1463 * - decoding: unused
b71901e6 1464 */
ce980a95 1465 int rc_min_rate;
115329f1 1466
b71901e6 1467 /**
f5bccd85
DB
1468 * decoder bitstream buffer size
1469 * - encoding: Set by user.
64863965 1470 * - decoding: unused
b71901e6 1471 */
ce980a95
MN
1472 int rc_buffer_size;
1473 float rc_buffer_aggressivity;
b71901e6
MN
1474
1475 /**
f5bccd85
DB
1476 * qscale factor between P and I-frames
1477 * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
1478 * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1479 * - encoding: Set by user.
64863965 1480 * - decoding: unused
b71901e6
MN
1481 */
1482 float i_quant_factor;
115329f1 1483
b71901e6 1484 /**
f5bccd85
DB
1485 * qscale offset between P and I-frames
1486 * - encoding: Set by user.
64863965 1487 * - decoding: unused
b71901e6
MN
1488 */
1489 float i_quant_offset;
115329f1 1490
b71901e6 1491 /**
f5bccd85
DB
1492 * initial complexity for pass1 ratecontrol
1493 * - encoding: Set by user.
64863965 1494 * - decoding: unused
b71901e6 1495 */
ce980a95 1496 float rc_initial_cplx;
917e06c8 1497
b71901e6 1498 /**
f5bccd85
DB
1499 * DCT algorithm, see FF_DCT_* below
1500 * - encoding: Set by user.
64863965 1501 * - decoding: unused
b71901e6 1502 */
28db7fce 1503 int dct_algo;
c7e07931 1504#define FF_DCT_AUTO 0
28db7fce 1505#define FF_DCT_FASTINT 1
c7e07931
MO
1506#define FF_DCT_INT 2
1507#define FF_DCT_MMX 3
1508#define FF_DCT_MLIB 4
05c4072b 1509#define FF_DCT_ALTIVEC 5
65e4c8c9 1510#define FF_DCT_FAAN 6
115329f1 1511
c5d309f2 1512 /**
f5bccd85
DB
1513 * luminance masking (0-> disabled)
1514 * - encoding: Set by user.
64863965 1515 * - decoding: unused
c5d309f2
MN
1516 */
1517 float lumi_masking;
115329f1 1518
c5d309f2 1519 /**
f5bccd85
DB
1520 * temporary complexity masking (0-> disabled)
1521 * - encoding: Set by user.
64863965 1522 * - decoding: unused
c5d309f2
MN
1523 */
1524 float temporal_cplx_masking;
115329f1 1525
c5d309f2 1526 /**
f5bccd85
DB
1527 * spatial complexity masking (0-> disabled)
1528 * - encoding: Set by user.
64863965 1529 * - decoding: unused
c5d309f2
MN
1530 */
1531 float spatial_cplx_masking;
115329f1 1532
c5d309f2 1533 /**
f5bccd85
DB
1534 * p block masking (0-> disabled)
1535 * - encoding: Set by user.
64863965 1536 * - decoding: unused
c5d309f2
MN
1537 */
1538 float p_masking;
15415af4 1539
5e746b99 1540 /**
f5bccd85
DB
1541 * darkness masking (0-> disabled)
1542 * - encoding: Set by user.
64863965 1543 * - decoding: unused
5e746b99
MN
1544 */
1545 float dark_masking;
115329f1 1546
0c2dd16e 1547 /**
f5bccd85
DB
1548 * IDCT algorithm, see FF_IDCT_* below.
1549 * - encoding: Set by user.
1550 * - decoding: Set by user.
2ad1516a
MN
1551 */
1552 int idct_algo;
273b0cd3
DB
1553#define FF_IDCT_AUTO 0
1554#define FF_IDCT_INT 1
1555#define FF_IDCT_SIMPLE 2
1556#define FF_IDCT_SIMPLEMMX 3
1557#define FF_IDCT_LIBMPEG2MMX 4
1558#define FF_IDCT_PS2 5
1559#define FF_IDCT_MLIB 6
1560#define FF_IDCT_ARM 7
1561#define FF_IDCT_ALTIVEC 8
1562#define FF_IDCT_SH4 9
1563#define FF_IDCT_SIMPLEARM 10
1564#define FF_IDCT_H264 11
1565#define FF_IDCT_VP3 12
1566#define FF_IDCT_IPP 13
1567#define FF_IDCT_XVIDMMX 14
1568#define FF_IDCT_CAVS 15
a0403006 1569#define FF_IDCT_SIMPLEARMV5TE 16
273b0cd3 1570#define FF_IDCT_SIMPLEARMV6 17
d9420d4d 1571#define FF_IDCT_SIMPLEVIS 18
9abc7e0f 1572#define FF_IDCT_WMV2 19
6f08c541 1573#define FF_IDCT_FAAN 20
42b30357 1574#define FF_IDCT_EA 21
7eec4328 1575#define FF_IDCT_SIMPLENEON 22
74c47463 1576#define FF_IDCT_SIMPLEALPHA 23
2ad1516a 1577
144f0625 1578 /**
f5bccd85
DB
1579 * slice count
1580 * - encoding: Set by libavcodec.
1581 * - decoding: Set by user (or 0).
144f0625
MN
1582 */
1583 int slice_count;
1584 /**
f5bccd85
DB
1585 * slice offsets in the frame in bytes
1586 * - encoding: Set/allocated by libavcodec.
1587 * - decoding: Set/allocated by user (or NULL).
144f0625
MN
1588 */
1589 int *slice_offset;
1590
4d2858de 1591 /**
f5bccd85 1592 * error concealment flags
64863965 1593 * - encoding: unused
f5bccd85 1594 * - decoding: Set by user.
4d2858de
MN
1595 */
1596 int error_concealment;
1597#define FF_EC_GUESS_MVS 1
1598#define FF_EC_DEBLOCK 2
1599
6b72ac63 1600 /**
bec89a84 1601 * dsp_mask could be add used to disable unwanted CPU features
8350df97 1602 * CPU features (i.e. MMX, SSE. ...)
bec89a84 1603 *
f5bccd85
DB
1604 * With the FORCE flag you may instead enable given CPU features.
1605 * (Dangerous: Usable in case of misdetection, improper usage however will
1606 * result into program crash.)
bec89a84
ZK
1607 */
1608 unsigned dsp_mask;
f5bccd85 1609#define FF_MM_FORCE 0x80000000 /* Force usage of selected flags (OR) */
bec89a84 1610 /* lower 16 bits - CPU features */
0cd60abf
MN
1611#define FF_MM_MMX 0x0001 ///< standard MMX
1612#define FF_MM_3DNOW 0x0004 ///< AMD 3DNOW
6b434361 1613#if LIBAVCODEC_VERSION_MAJOR < 53
0cd60abf 1614#define FF_MM_MMXEXT 0x0002 ///< SSE integer functions or AMD MMX ext
6b434361
SS
1615#endif
1616#define FF_MM_MMX2 0x0002 ///< SSE integer functions or AMD MMX ext
0cd60abf
MN
1617#define FF_MM_SSE 0x0008 ///< SSE functions
1618#define FF_MM_SSE2 0x0010 ///< PIV SSE2 functions
1619#define FF_MM_3DNOWEXT 0x0020 ///< AMD 3DNowExt
1620#define FF_MM_SSE3 0x0040 ///< Prescott SSE3 functions
1621#define FF_MM_SSSE3 0x0080 ///< Conroe SSSE3 functions
710441c2
DC
1622#define FF_MM_SSE4 0x0100 ///< Penryn SSE4.1 functions
1623#define FF_MM_SSE42 0x0200 ///< Nehalem SSE4.2 functions
0cd60abf 1624#define FF_MM_IWMMXT 0x0100 ///< XScale IWMMXT
82d1605f 1625#define FF_MM_ALTIVEC 0x0001 ///< standard AltiVec
11f18faf
MN
1626
1627 /**
64863965 1628 * bits per sample/pixel from the demuxer (needed for huffyuv).
f5bccd85
DB
1629 * - encoding: Set by libavcodec.
1630 * - decoding: Set by user.
11f18faf 1631 */
46a73068 1632 int bits_per_coded_sample;
115329f1 1633
11f18faf 1634 /**
f5bccd85
DB
1635 * prediction method (needed for huffyuv)
1636 * - encoding: Set by user.
64863965 1637 * - decoding: unused
11f18faf
MN
1638 */
1639 int prediction_method;
1640#define FF_PRED_LEFT 0
1641#define FF_PRED_PLANE 1
1642#define FF_PRED_MEDIAN 2
115329f1 1643
5d3cea3a 1644 /**
f5bccd85 1645 * sample aspect ratio (0 if unknown)
8e5af7a6 1646 * That is the width of a pixel divided by the height of the pixel.
f5bccd85
DB
1647 * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
1648 * - encoding: Set by user.
1649 * - decoding: Set by libavcodec.
5d3cea3a 1650 */
5ff85f1d 1651 AVRational sample_aspect_ratio;
1e491e29
MN
1652
1653 /**
f5bccd85
DB
1654 * the picture in the bitstream
1655 * - encoding: Set by libavcodec.
1656 * - decoding: Set by libavcodec.
1e491e29 1657 */
492cd3a9 1658 AVFrame *coded_frame;
c8c437bc
MN
1659
1660 /**
f5bccd85
DB
1661 * debug
1662 * - encoding: Set by user.
1663 * - decoding: Set by user.
c8c437bc
MN
1664 */
1665 int debug;
273b0cd3
DB
1666#define FF_DEBUG_PICT_INFO 1
1667#define FF_DEBUG_RC 2
1668#define FF_DEBUG_BITSTREAM 4
1669#define FF_DEBUG_MB_TYPE 8
1670#define FF_DEBUG_QP 16
1671#define FF_DEBUG_MV 32
1672#define FF_DEBUG_DCT_COEFF 0x00000040
1673#define FF_DEBUG_SKIP 0x00000080
1674#define FF_DEBUG_STARTCODE 0x00000100
1675#define FF_DEBUG_PTS 0x00000200
1676#define FF_DEBUG_ER 0x00000400
1677#define FF_DEBUG_MMCO 0x00000800
1678#define FF_DEBUG_BUGS 0x00001000
1679#define FF_DEBUG_VIS_QP 0x00002000
864119b6 1680#define FF_DEBUG_VIS_MB_TYPE 0x00004000
385c820b 1681#define FF_DEBUG_BUFFERS 0x00008000
115329f1 1682
140cb663 1683 /**
f5bccd85
DB
1684 * debug
1685 * - encoding: Set by user.
1686 * - decoding: Set by user.
0c9bbaec
WH
1687 */
1688 int debug_mv;
1689#define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1690#define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1691#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1692
1693 /**
f5bccd85
DB
1694 * error
1695 * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
64863965 1696 * - decoding: unused
140cb663
MN
1697 */
1698 uint64_t error[4];
115329f1 1699
17a70fde 1700 /**
f5bccd85 1701 * minimum MB quantizer
6e0d8c06 1702 * - encoding: unused
64863965 1703 * - decoding: unused
17a70fde
MN
1704 */
1705 int mb_qmin;
1706
1707 /**
f5bccd85 1708 * maximum MB quantizer
6e0d8c06 1709 * - encoding: unused
64863965 1710 * - decoding: unused
17a70fde
MN
1711 */
1712 int mb_qmax;
115329f1 1713
1457ab52 1714 /**
f5bccd85
DB
1715 * motion estimation comparison function
1716 * - encoding: Set by user.
64863965 1717 * - decoding: unused
1457ab52
MN
1718 */
1719 int me_cmp;
1720 /**
f5bccd85
DB
1721 * subpixel motion estimation comparison function
1722 * - encoding: Set by user.
64863965 1723 * - decoding: unused
1457ab52
MN
1724 */
1725 int me_sub_cmp;
1726 /**
f5bccd85
DB
1727 * macroblock comparison function (not supported yet)
1728 * - encoding: Set by user.
64863965 1729 * - decoding: unused
1457ab52
MN
1730 */
1731 int mb_cmp;
622348f9 1732 /**
f5bccd85
DB
1733 * interlaced DCT comparison function
1734 * - encoding: Set by user.
622348f9
MN
1735 * - decoding: unused
1736 */
1737 int ildct_cmp;
273b0cd3
DB
1738#define FF_CMP_SAD 0
1739#define FF_CMP_SSE 1
1740#define FF_CMP_SATD 2
1741#define FF_CMP_DCT 3
1742#define FF_CMP_PSNR 4
1743#define FF_CMP_BIT 5
1744#define FF_CMP_RD 6
1745#define FF_CMP_ZERO 7
1746#define FF_CMP_VSAD 8
1747#define FF_CMP_VSSE 9
1748#define FF_CMP_NSSE 10
1749#define FF_CMP_W53 11
1750#define FF_CMP_W97 12
0fd6aea1 1751#define FF_CMP_DCTMAX 13
27c61ac5 1752#define FF_CMP_DCT264 14
1457ab52 1753#define FF_CMP_CHROMA 256
115329f1 1754
1457ab52 1755 /**
f5bccd85
DB
1756 * ME diamond size & shape
1757 * - encoding: Set by user.
64863965 1758 * - decoding: unused
1457ab52
MN
1759 */
1760 int dia_size;
b07a5980
MN
1761
1762 /**
f5bccd85
DB
1763 * amount of previous MV predictors (2a+1 x 2a+1 square)
1764 * - encoding: Set by user.
64863965 1765 * - decoding: unused
b07a5980
MN
1766 */
1767 int last_predictor_count;
70ac76c0 1768
f5fb6b34 1769 /**
f5bccd85
DB
1770 * prepass for motion estimation
1771 * - encoding: Set by user.
64863965 1772 * - decoding: unused
f5fb6b34
MN
1773 */
1774 int pre_me;
b07a5980 1775
70ac76c0 1776 /**
f5bccd85
DB
1777 * motion estimation prepass comparison function
1778 * - encoding: Set by user.
64863965 1779 * - decoding: unused
70ac76c0
MN
1780 */
1781 int me_pre_cmp;
826f429a 1782
70ac76c0 1783 /**
f5bccd85
DB
1784 * ME prepass diamond size & shape
1785 * - encoding: Set by user.
64863965 1786 * - decoding: unused
70ac76c0
MN
1787 */
1788 int pre_dia_size;
1789
826f429a 1790 /**
f5bccd85
DB
1791 * subpel ME quality
1792 * - encoding: Set by user.
64863965 1793 * - decoding: unused
826f429a
MN
1794 */
1795 int me_subpel_quality;
1796
a33c7159 1797 /**
f5bccd85 1798 * callback to negotiate the pixelFormat
a33c7159 1799 * @param fmt is the list of formats which are supported by the codec,
f5bccd85
DB
1800 * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
1801 * The first is always the native one.
1802 * @return the chosen format
64863965 1803 * - encoding: unused
f5bccd85 1804 * - decoding: Set by user, if not set the native format will be chosen.
a33c7159 1805 */
494c56d3 1806 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
e2f9490e
FB
1807
1808 /**
f5bccd85
DB
1809 * DTG active format information (additional aspect ratio
1810 * information only used in DVB MPEG-2 transport streams)
1811 * 0 if not set.
115329f1 1812 *
f5bccd85
DB
1813 * - encoding: unused
1814 * - decoding: Set by decoder.
e2f9490e
FB
1815 */
1816 int dtg_active_format;
1817#define FF_DTG_AFD_SAME 8
1818#define FF_DTG_AFD_4_3 9
1819#define FF_DTG_AFD_16_9 10
1820#define FF_DTG_AFD_14_9 11
1821#define FF_DTG_AFD_4_3_SP_14_9 13
1822#define FF_DTG_AFD_16_9_SP_14_9 14
1823#define FF_DTG_AFD_SP_4_3 15
1824
ebbcdc9a 1825 /**
f5bccd85
DB
1826 * maximum motion estimation search range in subpel units
1827 * If 0 then no limit.
115329f1 1828 *
f5bccd85
DB
1829 * - encoding: Set by user.
1830 * - decoding: unused
ebbcdc9a 1831 */
59e0ac8e 1832 int me_range;
ebbcdc9a 1833
65f7062d 1834 /**
f5bccd85
DB
1835 * intra quantizer bias
1836 * - encoding: Set by user.
1984f635
MN
1837 * - decoding: unused
1838 */
1839 int intra_quant_bias;
1840#define FF_DEFAULT_QUANT_BIAS 999999
115329f1 1841
1984f635 1842 /**
f5bccd85
DB
1843 * inter quantizer bias
1844 * - encoding: Set by user.
1984f635
MN
1845 * - decoding: unused
1846 */
1847 int inter_quant_bias;
5cd62665
ZK
1848
1849 /**
f5bccd85
DB
1850 * color table ID
1851 * - encoding: unused
1852 * - decoding: Which clrtable should be used for 8bit RGB images.
1853 * Tables have to be stored somewhere. FIXME
5cd62665
ZK
1854 */
1855 int color_table_id;
115329f1 1856
d90cf87b 1857 /**
f5bccd85
DB
1858 * internal_buffer count
1859 * Don't touch, used by libavcodec default_get_buffer().
d90cf87b
MN
1860 */
1861 int internal_buffer_count;
115329f1 1862
d90cf87b 1863 /**
f5bccd85
DB
1864 * internal_buffers
1865 * Don't touch, used by libavcodec default_get_buffer().
d90cf87b
MN
1866 */
1867 void *internal_buffer;
158c7f05
MN
1868
1869#define FF_LAMBDA_SHIFT 7
1870#define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1871#define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1872#define FF_LAMBDA_MAX (256*128-1)
1873
1874#define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
3d2e8cce 1875 /**
f5bccd85
DB
1876 * Global quality for codecs which cannot change it per frame.
1877 * This should be proportional to MPEG-1/2/4 qscale.
1878 * - encoding: Set by user.
3d2e8cce
MN
1879 * - decoding: unused
1880 */
1881 int global_quality;
115329f1 1882
bd446bb1
MN
1883#define FF_CODER_TYPE_VLC 0
1884#define FF_CODER_TYPE_AC 1
f87459e4
KN
1885#define FF_CODER_TYPE_RAW 2
1886#define FF_CODER_TYPE_RLE 3
1887#define FF_CODER_TYPE_DEFLATE 4
11e659c2
MN
1888 /**
1889 * coder type
f5bccd85 1890 * - encoding: Set by user.
11e659c2
MN
1891 * - decoding: unused
1892 */
1893 int coder_type;
1894
1895 /**
1896 * context model
f5bccd85 1897 * - encoding: Set by user.
11e659c2
MN
1898 * - decoding: unused
1899 */
1900 int context_model;
5639729b
MN
1901#if 0
1902 /**
1903 *
1904 * - encoding: unused
f5bccd85 1905 * - decoding: Set by user.
5639729b
MN
1906 */
1907 uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1908#endif
115329f1 1909
3bb07d61
MN
1910 /**
1911 * slice flags
1912 * - encoding: unused
f5bccd85 1913 * - decoding: Set by user.
3bb07d61
MN
1914 */
1915 int slice_flags;
1916#define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1917#define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1918#define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1919
fb364ada
IK
1920 /**
1921 * XVideo Motion Acceleration
1922 * - encoding: forbidden
1923 * - decoding: set by decoder
1924 */
1925 int xvmc_acceleration;
115329f1 1926
7d1c3fc1
MN
1927 /**
1928 * macroblock decision mode
f5bccd85 1929 * - encoding: Set by user.
7d1c3fc1
MN
1930 * - decoding: unused
1931 */
1932 int mb_decision;
1933#define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1934#define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
e6dba5df 1935#define FF_MB_DECISION_RD 2 ///< rate distortion
d6eb3c50
MN
1936
1937 /**
1938 * custom intra quantization matrix
f5bccd85
DB
1939 * - encoding: Set by user, can be NULL.
1940 * - decoding: Set by libavcodec.
d6eb3c50
MN
1941 */
1942 uint16_t *intra_matrix;
1943
1944 /**
1945 * custom inter quantization matrix
f5bccd85
DB
1946 * - encoding: Set by user, can be NULL.
1947 * - decoding: Set by libavcodec.
d6eb3c50
MN
1948 */
1949 uint16_t *inter_matrix;
115329f1 1950
541ae140
MN
1951 /**
1952 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
f5bccd85 1953 * This is used to work around some encoder bugs.
541ae140 1954 * - encoding: unused
f5bccd85 1955 * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
541ae140
MN
1956 */
1957 unsigned int stream_codec_tag;
05fbd0a2
MN
1958
1959 /**
f5bccd85
DB
1960 * scene change detection threshold
1961 * 0 is default, larger means fewer detected scene changes.
1962 * - encoding: Set by user.
05fbd0a2
MN
1963 * - decoding: unused
1964 */
1965 int scenechange_threshold;
158c7f05
MN
1966
1967 /**
f5bccd85
DB
1968 * minimum Lagrange multipler
1969 * - encoding: Set by user.
158c7f05
MN
1970 * - decoding: unused
1971 */
1972 int lmin;
1973
1974 /**
f5bccd85
DB
1975 * maximum Lagrange multipler
1976 * - encoding: Set by user.
158c7f05
MN
1977 * - decoding: unused
1978 */
1979 int lmax;
2a2bbcb0
MM
1980
1981 /**
f5bccd85 1982 * palette control structure
2a2bbcb0 1983 * - encoding: ??? (no palette-enabled encoder yet)
f5bccd85 1984 * - decoding: Set by user.
2a2bbcb0
MM
1985 */
1986 struct AVPaletteControl *palctrl;
821cb11f
MN
1987
1988 /**
1989 * noise reduction strength
f5bccd85 1990 * - encoding: Set by user.
821cb11f
MN
1991 * - decoding: unused
1992 */
1993 int noise_reduction;
115329f1 1994
074c4ca7 1995 /**
f5bccd85
DB
1996 * Called at the beginning of a frame to get cr buffer for it.
1997 * Buffer type (size, hints) must be the same. libavcodec won't check it.
1998 * libavcodec will pass previous buffer in pic, function should return
e1c2a5a0 1999 * same buffer or new buffer with old frame "painted" into it.
f5bccd85 2000 * If pic.data[0] == NULL must behave like get_buffer().
f1b99cc6
MN
2001 * if CODEC_CAP_DR1 is not set then reget_buffer() must call
2002 * avcodec_default_reget_buffer() instead of providing buffers allocated by
2003 * some other means.
074c4ca7 2004 * - encoding: unused
f5bccd85 2005 * - decoding: Set by libavcodec., user can override
074c4ca7 2006 */
e1c2a5a0 2007 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
ba58dabc
MN
2008
2009 /**
f5bccd85
DB
2010 * Number of bits which should be loaded into the rc buffer before decoding starts.
2011 * - encoding: Set by user.
ba58dabc
MN
2012 * - decoding: unused
2013 */
2014 int rc_initial_buffer_occupancy;
2015
2016 /**
2017 *
f5bccd85 2018 * - encoding: Set by user.
ba58dabc
MN
2019 * - decoding: unused
2020 */
2021 int inter_threshold;
2022
2023 /**
f5bccd85
DB
2024 * CODEC_FLAG2_*
2025 * - encoding: Set by user.
2026 * - decoding: Set by user.
ba58dabc
MN
2027 */
2028 int flags2;
7ebfc0ea
MN
2029
2030 /**
f5bccd85
DB
2031 * Simulates errors in the bitstream to test error concealment.
2032 * - encoding: Set by user.
2033 * - decoding: unused
7ebfc0ea
MN
2034 */
2035 int error_rate;
115329f1 2036
a1e257b2
MN
2037 /**
2038 * MP3 antialias algorithm, see FF_AA_* below.
2039 * - encoding: unused
f5bccd85 2040 * - decoding: Set by user.
a1e257b2
MN
2041 */
2042 int antialias_algo;
2043#define FF_AA_AUTO 0
2044#define FF_AA_FASTINT 1 //not implemented yet
2045#define FF_AA_INT 2
2046#define FF_AA_FLOAT 3
77ea0d4b 2047 /**
f5bccd85
DB
2048 * quantizer noise shaping
2049 * - encoding: Set by user.
77ea0d4b
MN
2050 * - decoding: unused
2051 */
2052 int quantizer_noise_shaping;
9c3d33d6
MN
2053
2054 /**
f5bccd85 2055 * thread count
eafcac6a 2056 * is used to decide how many independent tasks should be passed to execute()
f5bccd85
DB
2057 * - encoding: Set by user.
2058 * - decoding: Set by user.
9c3d33d6
MN
2059 */
2060 int thread_count;
115329f1 2061
9c3d33d6 2062 /**
f5bccd85
DB
2063 * The codec may call this to execute several independent things.
2064 * It will return only after finishing all tasks.
2065 * The user may replace this with some multithreaded implementation,
2066 * the default implementation will execute the parts serially.
399cec2f 2067 * @param count the number of things to execute
f5bccd85
DB
2068 * - encoding: Set by libavcodec, user can override.
2069 * - decoding: Set by libavcodec, user can override.
9c3d33d6 2070 */
3a84713a 2071 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size);
115329f1 2072
9c3d33d6 2073 /**
f5bccd85
DB
2074 * thread opaque
2075 * Can be used by execute() to store some per AVCodecContext stuff.
9c3d33d6
MN
2076 * - encoding: set by execute()
2077 * - decoding: set by execute()
2078 */
2079 void *thread_opaque;
a4d36c11
MN
2080
2081 /**
f5bccd85
DB
2082 * Motion estimation threshold below which no motion estimation is
2083 * performed, but instead the user specified motion vectors are used.
115329f1 2084 *
f5bccd85 2085 * - encoding: Set by user.
f20f8a8b 2086 * - decoding: unused
a4d36c11 2087 */
2750b827 2088 int me_threshold;
f20f8a8b
MN
2089
2090 /**
f5bccd85
DB
2091 * Macroblock threshold below which the user specified macroblock types will be used.
2092 * - encoding: Set by user.
f20f8a8b
MN
2093 * - decoding: unused
2094 */
2095 int mb_threshold;
bf266e19
MN
2096
2097 /**
f5bccd85
DB
2098 * precision of the intra DC coefficient - 8
2099 * - encoding: Set by user.
bf266e19
MN
2100 * - decoding: unused
2101 */
2102 int intra_dc_precision;
d4c5d2ad
MN
2103
2104 /**
f5bccd85
DB
2105 * noise vs. sse weight for the nsse comparsion function
2106 * - encoding: Set by user.
d4c5d2ad
MN
2107 * - decoding: unused
2108 */
2109 int nsse_weight;
0dfd33c3
MN
2110
2111 /**
f5bccd85 2112 * Number of macroblock rows at the top which are skipped.
0dfd33c3 2113 * - encoding: unused
f5bccd85 2114 * - decoding: Set by user.
0dfd33c3
MN
2115 */
2116 int skip_top;
2117
2118 /**
f5bccd85 2119 * Number of macroblock rows at the bottom which are skipped.
0dfd33c3 2120 * - encoding: unused
f5bccd85 2121 * - decoding: Set by user.
0dfd33c3
MN
2122 */
2123 int skip_bottom;
baced9f5
MN
2124
2125 /**
2126 * profile
f5bccd85
DB
2127 * - encoding: Set by user.
2128 * - decoding: Set by libavcodec.
baced9f5
MN
2129 */
2130 int profile;
2131#define FF_PROFILE_UNKNOWN -99
dd0cd3d2 2132
4f2c36ac 2133#define FF_PROFILE_AAC_MAIN 0
273b0cd3
DB
2134#define FF_PROFILE_AAC_LOW 1
2135#define FF_PROFILE_AAC_SSR 2
2136#define FF_PROFILE_AAC_LTP 3
baced9f5 2137
dd0cd3d2
RC
2138#define FF_PROFILE_H264_BASELINE 66
2139#define FF_PROFILE_H264_MAIN 77
2140#define FF_PROFILE_H264_EXTENDED 88
2141#define FF_PROFILE_H264_HIGH 100
2142#define FF_PROFILE_H264_HIGH_10 110
2143#define FF_PROFILE_H264_HIGH_422 122
2144#define FF_PROFILE_H264_HIGH_444 244
2145#define FF_PROFILE_H264_CAVLC_444 44
2146
baced9f5
MN
2147 /**
2148 * level
f5bccd85
DB
2149 * - encoding: Set by user.
2150 * - decoding: Set by libavcodec.
baced9f5
MN
2151 */
2152 int level;
2153#define FF_LEVEL_UNKNOWN -99
178fcca8
MN
2154
2155 /**
f5bccd85 2156 * low resolution decoding, 1-> 1/2 size, 2->1/4 size
178fcca8 2157 * - encoding: unused
f5bccd85 2158 * - decoding: Set by user.
178fcca8
MN
2159 */
2160 int lowres;
21adafec
MN
2161
2162 /**
f5bccd85
DB
2163 * Bitstream width / height, may be different from width/height if lowres
2164 * or other things are used.
21adafec 2165 * - encoding: unused
f5bccd85 2166 * - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
21adafec
MN
2167 */
2168 int coded_width, coded_height;
bbf18b21
MN
2169
2170 /**
2171 * frame skip threshold
f5bccd85 2172 * - encoding: Set by user.
bbf18b21
MN
2173 * - decoding: unused
2174 */
2175 int frame_skip_threshold;
2176
2177 /**
2178 * frame skip factor
f5bccd85 2179 * - encoding: Set by user.
bbf18b21
MN
2180 * - decoding: unused
2181 */
2182 int frame_skip_factor;
0fd6aea1
MN
2183
2184 /**
2185 * frame skip exponent
f5bccd85 2186 * - encoding: Set by user.
0fd6aea1
MN
2187 * - decoding: unused
2188 */
2189 int frame_skip_exp;
2190
2191 /**
f5bccd85
DB
2192 * frame skip comparison function
2193 * - encoding: Set by user.
0fd6aea1
MN
2194 * - decoding: unused
2195 */
2196 int frame_skip_cmp;
957c743a
CM
2197
2198 /**
f5bccd85 2199 * Border processing masking, raises the quantizer for mbs on the borders
957c743a 2200 * of the picture.
f5bccd85 2201 * - encoding: Set by user.
957c743a
CM
2202 * - decoding: unused
2203 */
2204 float border_masking;
6e0d8c06
MN
2205
2206 /**
f5bccd85
DB
2207 * minimum MB lagrange multipler
2208 * - encoding: Set by user.
6e0d8c06
MN
2209 * - decoding: unused
2210 */
2211 int mb_lmin;
2212
2213 /**
f5bccd85
DB
2214 * maximum MB lagrange multipler
2215 * - encoding: Set by user.
6e0d8c06
MN
2216 * - decoding: unused
2217 */
2218 int mb_lmax;
09c3e44e
MN
2219
2220 /**
115329f1 2221 *
f5bccd85 2222 * - encoding: Set by user.
09c3e44e
MN
2223 * - decoding: unused
2224 */
2225 int me_penalty_compensation;
8c3eba7c
MN
2226
2227 /**
115329f1 2228 *
8c3eba7c 2229 * - encoding: unused
f5bccd85 2230 * - decoding: Set by user.
8c3eba7c
MN
2231 */
2232 enum AVDiscard skip_loop_filter;
2233
2234 /**
115329f1 2235 *
8c3eba7c 2236 * - encoding: unused
f5bccd85 2237 * - decoding: Set by user.
8c3eba7c
MN
2238 */
2239 enum AVDiscard skip_idct;
2240
2241 /**
115329f1 2242 *
8c3eba7c 2243 * - encoding: unused
f5bccd85 2244 * - decoding: Set by user.
8c3eba7c
MN
2245 */
2246 enum AVDiscard skip_frame;
316a2ec8
MN
2247
2248 /**
2249 *
f5bccd85 2250 * - encoding: Set by user.
316a2ec8
MN
2251 * - decoding: unused
2252 */
2253 int bidir_refine;
e8501c93
MN
2254
2255 /**
2256 *
f5bccd85 2257 * - encoding: Set by user.
e8501c93
MN
2258 * - decoding: unused
2259 */
2260 int brd_scale;
58f7833e
RS
2261
2262 /**
2263 * constant rate factor - quality-based VBR - values ~correspond to qps
f5bccd85 2264 * - encoding: Set by user.
58f7833e
RS
2265 * - decoding: unused
2266 */
9f1c1c99 2267 float crf;
58f7833e
RS
2268
2269 /**
2270 * constant quantization parameter rate control method
f5bccd85 2271 * - encoding: Set by user.
58f7833e
RS
2272 * - decoding: unused
2273 */
2274 int cqp;
2275
2276 /**
f5bccd85
DB
2277 * minimum GOP size
2278 * - encoding: Set by user.
58f7833e
RS
2279 * - decoding: unused
2280 */
2281 int keyint_min;
2282
2283 /**
2284 * number of reference frames
f5bccd85 2285 * - encoding: Set by user.
53d55e9e 2286 * - decoding: Set by lavc.
58f7833e
RS
2287 */
2288 int refs;
2289
2290 /**
2291 * chroma qp offset from luma
f5bccd85 2292 * - encoding: Set by user.
58f7833e
RS
2293 * - decoding: unused
2294 */
2295 int chromaoffset;
2296
2297 /**
f5bccd85
DB
2298 * Influences how often B-frames are used.
2299 * - encoding: Set by user.
58f7833e
RS
2300 * - decoding: unused
2301 */
2302 int bframebias;
2303
2304 /**
2305 * trellis RD quantization
f5bccd85 2306 * - encoding: Set by user.
58f7833e
RS
2307 * - decoding: unused
2308 */
2309 int trellis;
2310
2311 /**
f5bccd85
DB
2312 * Reduce fluctuations in qp (before curve compression).
2313 * - encoding: Set by user.
58f7833e
RS
2314 * - decoding: unused
2315 */
2316 float complexityblur;
2317
2318 /**
2319 * in-loop deblocking filter alphac0 parameter
2320 * alpha is in the range -6...6
f5bccd85 2321 * - encoding: Set by user.
58f7833e
RS
2322 * - decoding: unused
2323 */
2324 int deblockalpha;
2325
2326 /**
2327 * in-loop deblocking filter beta parameter
2328 * beta is in the range -6...6
f5bccd85 2329 * - encoding: Set by user.
58f7833e
RS
2330 * - decoding: unused
2331 */
2332 int deblockbeta;
2333
2334 /**
2335 * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
f5bccd85 2336 * - encoding: Set by user.
58f7833e
RS
2337 * - decoding: unused
2338 */
2339 int partitions;
56cc85a0
DB
2340#define X264_PART_I4X4 0x001 /* Analyze i4x4 */
2341#define X264_PART_I8X8 0x002 /* Analyze i8x8 (requires 8x8 transform) */
2342#define X264_PART_P8X8 0x010 /* Analyze p16x8, p8x16 and p8x8 */
2343#define X264_PART_P4X4 0x020 /* Analyze p8x4, p4x8, p4x4 */
2344#define X264_PART_B8X8 0x100 /* Analyze b16x8, b8x16 and b8x8 */
58f7833e
RS
2345
2346 /**
30ab4ded 2347 * direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal), 3 (auto)
f5bccd85 2348 * - encoding: Set by user.
58f7833e
RS
2349 * - decoding: unused
2350 */
2351 int directpred;
4f59b684 2352
14f0c8e2 2353 /**
02c164c1 2354 * Audio cutoff bandwidth (0 means "automatic")
f5bccd85 2355 * - encoding: Set by user.
14f0c8e2
LA
2356 * - decoding: unused
2357 */
2358 int cutoff;
39a64e30
CH
2359
2360 /**
f5bccd85
DB
2361 * Multiplied by qscale for each frame and added to scene_change_score.
2362 * - encoding: Set by user.
39a64e30
CH
2363 * - decoding: unused
2364 */
2365 int scenechange_factor;
1dd509b1
MN
2366
2367 /**
2368 *
f5bccd85
DB
2369 * Note: Value depends upon the compare function used for fullpel ME.
2370 * - encoding: Set by user.
1dd509b1
MN
2371 * - decoding: unused
2372 */
2373 int mv0_threshold;
f9243d34
CH
2374
2375 /**
f5bccd85
DB
2376 * Adjusts sensitivity of b_frame_strategy 1.
2377 * - encoding: Set by user.
f9243d34
CH
2378 * - decoding: unused
2379 */
2380 int b_sensitivity;
a403fc03
JR
2381
2382 /**
f5bccd85 2383 * - encoding: Set by user.
a403fc03
JR
2384 * - decoding: unused
2385 */
2386 int compression_level;
2387#define FF_COMPRESSION_DEFAULT -1
2388
2389 /**
f5bccd85
DB
2390 * Sets whether to use LPC mode - used by FLAC encoder.
2391 * - encoding: Set by user.
2392 * - decoding: unused
a403fc03
JR
2393 */
2394 int use_lpc;
2395
2396 /**
2397 * LPC coefficient precision - used by FLAC encoder
f5bccd85
DB
2398 * - encoding: Set by user.
2399 * - decoding: unused
a403fc03
JR
2400 */
2401 int lpc_coeff_precision;
2402
2403 /**
f5bccd85
DB
2404 * - encoding: Set by user.
2405 * - decoding: unused
a403fc03
JR
2406 */
2407 int min_prediction_order;
2408
2409 /**
f5bccd85
DB
2410 * - encoding: Set by user.
2411 * - decoding: unused
a403fc03
JR
2412 */
2413 int max_prediction_order;
2414
2415 /**
2416 * search method for selecting prediction order
f5bccd85
DB
2417 * - encoding: Set by user.
2418 * - decoding: unused
a403fc03
JR
2419 */
2420 int prediction_order_method;
2421
2422 /**
f5bccd85
DB
2423 * - encoding: Set by user.
2424 * - decoding: unused
a403fc03
JR
2425 */
2426 int min_partition_order;
2427
2428 /**
f5bccd85
DB
2429 * - encoding: Set by user.
2430 * - decoding: unused
a403fc03
JR
2431 */
2432 int max_partition_order;
80d617f5
BC
2433
2434 /**
2435 * GOP timecode frame start number, in non drop frame format
f5bccd85
DB
2436 * - encoding: Set by user.
2437 * - decoding: unused
80d617f5
BC
2438 */
2439 int64_t timecode_frame_start;
b1ec601f 2440
0d72e7d0 2441#if LIBAVCODEC_VERSION_MAJOR < 53
b1ec601f 2442 /**
85947156
VS
2443 * Decoder should decode to this many channels if it can (0 for default)
2444 * - encoding: unused
2445 * - decoding: Set by user.
0d72e7d0 2446 * @deprecated Deprecated in favor of request_channel_layout.
b1ec601f
RD
2447 */
2448 int request_channels;
0d72e7d0 2449#endif
1408352a
JR
2450
2451 /**
2452 * Percentage of dynamic range compression to be applied by the decoder.
2453 * The default value is 1.0, corresponding to full compression.
2454 * - encoding: unused
2455 * - decoding: Set by user.
2456 */
2457 float drc_scale;
79de84f2
MN
2458
2459 /**
2460 * opaque 64bit number (generally a PTS) that will be reordered and
2461 * output in AVFrame.reordered_opaque
2462 * - encoding: unused
2463 * - decoding: Set by user.
2464 */
2465 int64_t reordered_opaque;
312420f3
PR
2466
2467 /**
2468 * Bits per sample/pixel of internal libavcodec pixel/sample format.
2469 * This field is applicable only when sample_fmt is SAMPLE_FMT_S32.
2470 * - encoding: set by user.
2471 * - decoding: set by libavcodec.
2472 */
2473 int bits_per_raw_sample;
0d72e7d0
PR
2474
2475 /**
2476 * Audio channel layout.
2477 * - encoding: set by user.
2478 * - decoding: set by libavcodec.
2479 */
2480 int64_t channel_layout;
2481
2482 /**
2483 * Request decoder to use this channel layout if it can (0 for default)
2484 * - encoding: unused
2485 * - decoding: Set by user.
2486 */
2487 int64_t request_channel_layout;
3bff4d8b
BC
2488
2489 /**
2490 * Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow.
2491 * - encoding: Set by user.
2492 * - decoding: unused.
2493 */
2494 float rc_max_available_vbv_use;
2495
2496 /**
2497 * Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow.
2498 * - encoding: Set by user.
2499 * - decoding: unused.
2500 */
2501 float rc_min_vbv_overflow_use;
40e5d31b
GB
2502
2503 /**
2504 * Hardware accelerator in use
2505 * - encoding: unused.
2506 * - decoding: Set by libavcodec
2507 */
2508 struct AVHWAccel *hwaccel;
3797c74b
MN
2509
2510 /**
2511 * For some codecs, the time base is closer to the field rate than the frame rate.
2512 * Most notably, H.264 and MPEG-2 specify time_base as half of frame duration
2513 * if no telecine is used ...
2514 *
2515 * Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2.
2516 */
2517 int ticks_per_frame;
1aea7018
GB
2518
2519 /**
2520 * Hardware accelerator context.
2521 * For some hardware accelerators, a global context needs to be
2522 * provided by the user. In that case, this holds display-dependent
2523 * data FFmpeg cannot instantiate itself. Please refer to the
2524 * FFmpeg HW accelerator documentation to know how to fill this
2525 * is. e.g. for VA API, this is a struct vaapi_context.
2526 * - encoding: unused
2527 * - decoding: Set by user
2528 */
2529 void *hwaccel_context;
4ee6a5c1
MN
2530
2531 /**
2532 * Chromaticity coordinates of the source primaries.
2533 * - encoding: Set by user
2534 * - decoding: Set by libavcodec
2535 */
2536 enum AVColorPrimaries color_primaries;
2537
2538 /**
2539 * Color Transfer Characteristic.
2540 * - encoding: Set by user
2541 * - decoding: Set by libavcodec
2542 */
2543 enum AVColorTransferCharacteristic color_trc;
2544
2545 /**
2546 * YUV colorspace type.
2547 * - encoding: Set by user
2548 * - decoding: Set by libavcodec
2549 */
2550 enum AVColorSpace colorspace;
2551
2552 /**
2553 * MPEG vs JPEG YUV range.
2554 * - encoding: Set by user
2555 * - decoding: Set by libavcodec
2556 */
2557 enum AVColorRange color_range;
580a7465
DC
2558
2559 /**
2560 * This defines the location of chroma samples.
2561 * - encoding: Set by user
2562 * - decoding: Set by libavcodec
2563 */
8ea08bec 2564 enum AVChromaLocation chroma_sample_location;
8d23a86f
RD
2565
2566 /**
2567 * The codec may call this to execute several independent things.
2568 * It will return only after finishing all tasks.
2569 * The user may replace this with some multithreaded implementation,
2570 * the default implementation will execute the parts serially.
2571 * Also see avcodec_thread_init and e.g. the --enable-pthread configure option.
2572 * @param c context passed also to func
2573 * @param count the number of things to execute
2574 * @param arg2 argument passed unchanged to func
2575 * @param ret return values of executed functions, must have space for "count" values. May be NULL.
2576 * @param func function that will be called count times, with jobnr from 0 to count-1.
2577 * threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no
2578 * two instances of func executing at the same time will have the same threadnr.
2579 * @return always 0 currently, but code should handle a future improvement where when any call to func
2580 * returns < 0 no further calls to func may be done and < 0 is returned.
2581 * - encoding: Set by libavcodec, user can override.
2582 * - decoding: Set by libavcodec, user can override.
2583 */
2584 int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count);
096c87f6
JGG
2585
2586 /**
2587 * explicit P-frame weighted prediction analysis method
2588 * 0: off
2589 * 1: fast blind weighting (one reference duplicate with -1 offset)
2590 * 2: smart weighting (full fade detection analysis)
2591 * - encoding: Set by user.
2592 * - decoding: unused
2593 */
2594 int weighted_p_pred;
de6d9b64
FB
2595} AVCodecContext;
2596
64863965
MN
2597/**
2598 * AVCodec.
2599 */
de6d9b64 2600typedef struct AVCodec {
6b0cdb6e
NG
2601 /**
2602 * Name of the codec implementation.
2603 * The name is globally unique among encoders and among decoders (but an
2604 * encoder and a decoder can share the same name).
2605 * This is the primary way to find a codec from the user perspective.
2606 */
18f77016 2607 const char *name;
5d234974 2608 enum CodecType type;
9297ddd3 2609 enum CodecID id;
de6d9b64
FB
2610 int priv_data_size;
2611 int (*init)(AVCodecContext *);
0c1a9eda 2612 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
de6d9b64 2613 int (*close)(AVCodecContext *);
7a00bbad 2614 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt);
a2d11246
MN
2615 /**
2616 * Codec capabilities.
2617 * see CODEC_CAP_*
2618 */
bf89e6b1 2619 int capabilities;
de6d9b64 2620 struct AVCodec *next;
c8cf325a
MN
2621 /**
2622 * Flush buffers.
2623 * Will be called when seeking
2624 */
7a06ff14 2625 void (*flush)(AVCodecContext *);
716e31ea 2626 const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0}
1beb670a 2627 const enum PixelFormat *pix_fmts; ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1
fe4bf374 2628 /**
bf7e799c
SS
2629 * Descriptive name for the codec, meant to be more human readable than name.
2630 * You should use the NULL_IF_CONFIG_SMALL() macro to define it.
fe4bf374
SS
2631 */
2632 const char *long_name;
3ade5d56 2633 const int *supported_samplerates; ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
88a07af7 2634 const enum SampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1
0d72e7d0 2635 const int64_t *channel_layouts; ///< array of support channel layouts, or NULL if unknown. array is terminated by 0
de6d9b64
FB
2636} AVCodec;
2637
97d96aaa 2638/**
40e5d31b
GB
2639 * AVHWAccel.
2640 */
2641typedef struct AVHWAccel {
2642 /**
2643 * Name of the hardware accelerated codec.
2644 * The name is globally unique among encoders and among decoders (but an
2645 * encoder and a decoder can share the same name).
2646 */
2647 const char *name;
2648
2649 /**
2650 * Type of codec implemented by the hardware accelerator.
2651 *
2652 * See CODEC_TYPE_xxx
2653 */
2654 enum CodecType type;
2655
2656 /**
2657 * Codec implemented by the hardware accelerator.
2658 *
2659 * See CODEC_ID_xxx
2660 */
2661 enum CodecID id;
2662
2663 /**
2664 * Supported pixel format.
2665 *
2666 * Only hardware accelerated formats are supported here.
2667 */
2668 enum PixelFormat pix_fmt;
2669
2670 /**
2671 * Hardware accelerated codec capabilities.
2672 * see FF_HWACCEL_CODEC_CAP_*
2673 */
2674 int capabilities;
2675
2676 struct AVHWAccel *next;
2677
2678 /**
2679 * Called at the beginning of each frame or field picture.
2680 *
2681 * Meaningful frame information (codec specific) is guaranteed to
2682 * be parsed at this point. This function is mandatory.
2683 *
bf7e799c 2684 * Note that buf can be NULL along with buf_size set to 0.
40e5d31b
GB
2685 * Otherwise, this means the whole frame is available at this point.
2686 *
2687 * @param avctx the codec context
2688 * @param buf the frame data buffer base
2689 * @param buf_size the size of the frame in bytes
2690 * @return zero if successful, a negative value otherwise
2691 */
2692 int (*start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
2693
2694 /**
2695 * Callback for each slice.
2696 *
2697 * Meaningful slice information (codec specific) is guaranteed to
2698 * be parsed at this point. This function is mandatory.
2699 *
2700 * @param avctx the codec context
2701 * @param buf the slice data buffer base
2702 * @param buf_size the size of the slice in bytes
2703 * @return zero if successful, a negative value otherwise
2704 */
2705 int (*decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
2706
2707 /**
2708 * Called at the end of each frame or field picture.
2709 *
2710 * The whole picture is parsed at this point and can now be sent
2711 * to the hardware accelerator. This function is mandatory.
2712 *
2713 * @param avctx the codec context
2714 * @return zero if successful, a negative value otherwise
2715 */
2716 int (*end_frame)(AVCodecContext *avctx);
68e5d523
GB
2717
2718 /**
2719 * Size of HW accelerator private data.
2720 *
cd823ff9
GB
2721 * Private data is allocated with av_mallocz() before
2722 * AVCodecContext.get_buffer() and deallocated after
2723 * AVCodecContext.release_buffer().
68e5d523
GB
2724 */
2725 int priv_data_size;
40e5d31b
GB
2726} AVHWAccel;
2727
2728/**
d7425f59
MN
2729 * four components are given, that's all.
2730 * the last component is alpha
2731 */
de6d9b64 2732typedef struct AVPicture {
0c1a9eda 2733 uint8_t *data[4];
cd394651 2734 int linesize[4]; ///< number of bytes per line
de6d9b64
FB
2735} AVPicture;
2736
2bbd8571 2737#if LIBAVCODEC_VERSION_MAJOR < 53
ba118447 2738/**
85947156
VS
2739 * AVPaletteControl
2740 * This structure defines a method for communicating palette changes
2741 * between and demuxer and a decoder.
2742 *
671adb17 2743 * @deprecated Use AVPacket to send palette changes instead.
85947156 2744 * This is totally broken.
ba118447 2745 */
2e99641b 2746#define AVPALETTE_SIZE 1024
432d84c3 2747#define AVPALETTE_COUNT 256
ba118447
MM
2748typedef struct AVPaletteControl {
2749
f5bccd85
DB
2750 /* Demuxer sets this to 1 to indicate the palette has changed;
2751 * decoder resets to 0. */
ba118447
MM
2752 int palette_changed;
2753
2a2bbcb0
MM
2754 /* 4-byte ARGB palette entries, stored in native byte order; note that
2755 * the individual palette components should be on a 8-bit scale; if
f5bccd85
DB
2756 * the palette data comes from an IBM VGA native format, the component
2757 * data is probably 6 bits in size and needs to be scaled. */
2e99641b 2758 unsigned int palette[AVPALETTE_COUNT];
ba118447 2759
18239edf 2760} AVPaletteControl attribute_deprecated;
2bbd8571 2761#endif
ba118447 2762
c66216ed
MN
2763enum AVSubtitleType {
2764 SUBTITLE_NONE,
2765
2766 SUBTITLE_BITMAP, ///< A bitmap, pict will be set
2767
2768 /**
2769 * Plain text, the text field must be set by the decoder and is
2770 * authoritative. ass and pict fields may contain approximations.
2771 */
2772 SUBTITLE_TEXT,
2773
2774 /**
2775 * Formatted text, the ass field must be set by the decoder and is
2776 * authoritative. pict and text fields may contain approximations.
2777 */
2778 SUBTITLE_ASS,
2779};
2780
c6ec28b1 2781typedef struct AVSubtitleRect {
ebc466bb
MN
2782 int x; ///< top left corner of pict, undefined when pict is not set
2783 int y; ///< top left corner of pict, undefined when pict is not set
2784 int w; ///< width of pict, undefined when pict is not set
2785 int h; ///< height of pict, undefined when pict is not set
2786 int nb_colors; ///< number of colors in pict, undefined when pict is not set
25b4c651
MN
2787
2788 /**
2789 * data+linesize for the bitmap of this subtitle.
2790 * can be set for text/ass as well once they where rendered
2791 */
2792 AVPicture pict;
f656106f
MN
2793 enum AVSubtitleType type;
2794
2795 char *text; ///< 0 terminated plain UTF-8 text
2796
2797 /**
2798 * 0 terminated ASS/SSA compatible event line.
2799 * The pressentation of this is unaffected by the other values in this
2800 * struct.
2801 */
2802 char *ass;
c6ec28b1
MN
2803} AVSubtitleRect;
2804
2805typedef struct AVSubtitle {
2806 uint16_t format; /* 0 = graphics */
2807 uint32_t start_display_time; /* relative to packet pts, in ms */
2808 uint32_t end_display_time; /* relative to packet pts, in ms */
ebc466bb 2809 unsigned num_rects;
db4fac64 2810 AVSubtitleRect **rects;
4bbe788a 2811 int64_t pts; ///< Same as packet pts, in AV_TIME_BASE
240c1657
FB
2812} AVSubtitle;
2813
cdd8930e
TB
2814/* packet functions */
2815
80d403fc
RD
2816/**
2817 * @deprecated use NULL instead
2818 */
2819attribute_deprecated void av_destruct_packet_nofree(AVPacket *pkt);
cdd8930e
TB
2820
2821/**
2822 * Default packet destructor.
2823 */
2824void av_destruct_packet(AVPacket *pkt);
2825
2826/**
2827 * Initialize optional fields of a packet with default values.
2828 *
2829 * @param pkt packet
2830 */
2831void av_init_packet(AVPacket *pkt);
2832
2833/**
2834 * Allocate the payload of a packet and initialize its fields with
2835 * default values.
2836 *
2837 * @param pkt packet
2838 * @param size wanted payload size
2839 * @return 0 if OK, AVERROR_xxx otherwise
2840 */
2841int av_new_packet(AVPacket *pkt, int size);
2842
2843/**
feb993e5
RD
2844 * Reduce packet size, correctly zeroing padding
2845 *
2846 * @param pkt packet
2847 * @param size new size
2848 */
2849void av_shrink_packet(AVPacket *pkt, int size);
2850
2851/**
cdd8930e
TB
2852 * @warning This is a hack - the packet memory allocation stuff is broken. The
2853 * packet is allocated if it was not really allocated.
2854 */
2855int av_dup_packet(AVPacket *pkt);
2856
2857/**
2858 * Free a packet.
2859 *
2860 * @param pkt packet to free
2861 */
ce1d9c85 2862void av_free_packet(AVPacket *pkt);
240c1657 2863
de6d9b64
FB
2864/* resample.c */
2865
2866struct ReSampleContext;
aaaf1635 2867struct AVResampleContext;
de6d9b64
FB
2868
2869typedef struct ReSampleContext ReSampleContext;
2870
d1e3c6fd
BC
2871#if LIBAVCODEC_VERSION_MAJOR < 53
2872/**
2873 * @deprecated Use av_audio_resample_init() instead.
2874 */
2875attribute_deprecated ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2876 int output_rate, int input_rate);
2877#endif
2878/**
2879 * Initializes audio resampling context
2880 *
2881 * @param output_channels number of output channels
2882 * @param input_channels number of input channels
2883 * @param output_rate output sample rate
2884 * @param input_rate input sample rate
2885 * @param sample_fmt_out requested output sample format
2886 * @param sample_fmt_in input sample format
2887 * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
2888 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
2889 * @param linear If 1 then the used FIR filter will be linearly interpolated
2890 between the 2 closest, if 0 the closest will be used
2891 * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
2892 * @return allocated ReSampleContext, NULL if error occured
2893 */
2894ReSampleContext *av_audio_resample_init(int output_channels, int input_channels,
2895 int output_rate, int input_rate,
2896 enum SampleFormat sample_fmt_out,
2897 enum SampleFormat sample_fmt_in,
2898 int filter_length, int log2_phase_count,
2899 int linear, double cutoff);
2900
de6d9b64
FB
2901int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2902void audio_resample_close(ReSampleContext *s);
2903
3136fcf4
MN
2904
2905/**
2906 * Initializes an audio resampler.
2907 * Note, if either rate is not an integer then simply scale both rates up so they are.
990058bd
MN
2908 * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
2909 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
2910 * @param linear If 1 then the used FIR filter will be linearly interpolated
2911 between the 2 closest, if 0 the closest will be used
2912 * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
3136fcf4 2913 */
6e225de2 2914struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
3136fcf4
MN
2915
2916/**
2917 * resamples.
2918 * @param src an array of unconsumed samples
2919 * @param consumed the number of samples of src which have been consumed are returned here
2920 * @param src_size the number of unconsumed samples available
2921 * @param dst_size the amount of space in samples available in dst
2922 * @param update_ctx If this is 0 then the context will not be modified, that way several channels can be resampled with the same context.
2923 * @return the number of samples written in dst or -1 if an error occurred
2924 */
aaaf1635 2925int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
3136fcf4
MN
2926
2927
2928/**
2929 * Compensates samplerate/timestamp drift. The compensation is done by changing
2930 * the resampler parameters, so no audible clicks or similar distortions occur
2931 * @param compensation_distance distance in output samples over which the compensation should be performed
2932 * @param sample_delta number of output samples which should be output less
2933 *
2934 * example: av_resample_compensate(c, 10, 500)
2935 * here instead of 510 samples only 500 samples would be output
2936 *
2937 * note, due to rounding the actual compensation might be slightly different,
2938 * especially if the compensation_distance is large and the in_rate used during init is small
2939 */
2d48eddd 2940void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
d88443ae 2941void av_resample_close(struct AVResampleContext *c);
aaaf1635 2942
75917b88
DH
2943/**
2944 * Allocate memory for a picture. Call avpicture_free to free it.
2945 *
f5bccd85
DB
2946 * @param picture the picture to be filled in
2947 * @param pix_fmt the format of the picture
2948 * @param width the width of the picture
2949 * @param height the height of the picture
2950 * @return zero if successful, a negative value if not
75917b88 2951 */
a61ec8e7 2952int avpicture_alloc(AVPicture *picture, enum PixelFormat pix_fmt, int width, int height);
75917b88 2953
8fc3d25c
PI
2954/**
2955 * Free a picture previously allocated by avpicture_alloc().
2956 *
f5bccd85 2957 * @param picture the AVPicture to be freed
8fc3d25c 2958 */
75917b88
DH
2959void avpicture_free(AVPicture *picture);
2960
392cf77a 2961/**
f5bccd85 2962 * Fill in the AVPicture fields.
392cf77a
PI
2963 * The fields of the given AVPicture are filled in by using the 'ptr' address
2964 * which points to the image data buffer. Depending on the specified picture
2965 * format, one or multiple image data pointers and line sizes will be set.
2966 * If a planar format is specified, several pointers will be set pointing to
2967 * the different picture planes and the line sizes of the different planes
2968 * will be stored in the lines_sizes array.
899a8fa1 2969 * Call with ptr == NULL to get the required size for the ptr buffer.
392cf77a 2970 *
f5bccd85 2971 * @param picture AVPicture whose fields are to be filled in
392cf77a 2972 * @param ptr Buffer which will contain or contains the actual image data
f5bccd85
DB
2973 * @param pix_fmt The format in which the picture data is stored.
2974 * @param width the width of the image in pixels
2975 * @param height the height of the image in pixels
2976 * @return size of the image data in bytes
392cf77a 2977 */
0c1a9eda 2978int avpicture_fill(AVPicture *picture, uint8_t *ptr,
4a30fff6 2979 enum PixelFormat pix_fmt, int width, int height);
a61ec8e7 2980int avpicture_layout(const AVPicture* src, enum PixelFormat pix_fmt, int width, int height,
63167088 2981 unsigned char *dest, int dest_size);
392cf77a
PI
2982
2983/**
2984 * Calculate the size in bytes that a picture of the given width and height
2985 * would occupy if stored in the given picture format.
899a8fa1
RD
2986 * Note that this returns the size of a compact representation as generated
2987 * by avpicture_layout, which can be smaller than the size required for e.g.
2988 * avpicture_fill.
392cf77a 2989 *
f5bccd85
DB
2990 * @param pix_fmt the given picture format
2991 * @param width the width of the image
2992 * @param height the height of the image
899a8fa1 2993 * @return Image data size in bytes or -1 on error (e.g. too large dimensions).
392cf77a 2994 */
a61ec8e7
SS
2995int avpicture_get_size(enum PixelFormat pix_fmt, int width, int height);
2996void avcodec_get_chroma_sub_sample(enum PixelFormat pix_fmt, int *h_shift, int *v_shift);
2997const char *avcodec_get_pix_fmt_name(enum PixelFormat pix_fmt);
21adafec 2998void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
d89f692f 2999
80a07f6e 3000#if LIBAVCODEC_VERSION_MAJOR < 53
d89f692f 3001/**
bf7e799c 3002 * Returns the pixel format corresponding to the name name.
d89f692f 3003 *
bf7e799c 3004 * If there is no pixel format with name name, then looks for a
d89f692f 3005 * pixel format with the name corresponding to the native endian
bf7e799c 3006 * format of name.
d89f692f
SS
3007 * For example in a little-endian system, first looks for "gray16",
3008 * then for "gray16le".
3009 *
bf7e799c 3010 * Finally if no pixel format has been found, returns PIX_FMT_NONE.
80a07f6e
SS
3011 *
3012 * @deprecated Deprecated in favor of av_get_pix_fmt().
d89f692f 3013 */
80a07f6e
SS
3014attribute_deprecated enum PixelFormat avcodec_get_pix_fmt(const char* name);
3015#endif
fa4dc9f0
SS
3016
3017/**
3018 * Returns a value representing the fourCC code associated to the
3019 * pixel format pix_fmt, or 0 if no associated fourCC code can be
3020 * found.
3021 */
3022unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat pix_fmt);
219b06c6 3023
81299d42
PI
3024#define FF_LOSS_RESOLUTION 0x0001 /**< loss due to resolution change */
3025#define FF_LOSS_DEPTH 0x0002 /**< loss due to color depth change */
3026#define FF_LOSS_COLORSPACE 0x0004 /**< loss due to color space conversion */
3027#define FF_LOSS_ALPHA 0x0008 /**< loss of alpha bits */
3028#define FF_LOSS_COLORQUANT 0x0010 /**< loss due to color quantization */
3029#define FF_LOSS_CHROMA 0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
fab21997 3030
392cf77a 3031/**
81299d42
PI
3032 * Computes what kind of losses will occur when converting from one specific
3033 * pixel format to another.
3034 * When converting from one pixel format to another, information loss may occur.
3035 * For example, when converting from RGB24 to GRAY, the color information will
3036 * be lost. Similarly, other losses occur when converting from some formats to
3037 * other formats. These losses can involve loss of chroma, but also loss of
3038 * resolution, loss of color depth, loss due to the color space conversion, loss
3039 * of the alpha bits or loss due to color quantization.
f5bccd85
DB
3040 * avcodec_get_fix_fmt_loss() informs you about the various types of losses
3041 * which will occur when converting from one pixel format to another.
81299d42 3042 *
f5bccd85
DB
3043 * @param[in] dst_pix_fmt destination pixel format
3044 * @param[in] src_pix_fmt source pixel format
81299d42
PI
3045 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
3046 * @return Combination of flags informing you what kind of losses will occur.
392cf77a 3047 */
a61ec8e7 3048int avcodec_get_pix_fmt_loss(enum PixelFormat dst_pix_fmt, enum PixelFormat src_pix_fmt,
fab21997 3049 int has_alpha);
392cf77a
PI
3050
3051/**
81299d42
PI
3052 * Finds the best pixel format to convert to given a certain source pixel
3053 * format. When converting from one pixel format to another, information loss
3054 * may occur. For example, when converting from RGB24 to GRAY, the color
3055 * information will be lost. Similarly, other losses occur when converting from
3056 * some formats to other formats. avcodec_find_best_pix_fmt() searches which of
f5bccd85
DB
3057 * the given pixel formats should be used to suffer the least amount of loss.
3058 * The pixel formats from which it chooses one, are determined by the
bf7e799c 3059 * pix_fmt_mask parameter.
81299d42
PI
3060 *
3061 * @code
3062 * src_pix_fmt = PIX_FMT_YUV420P;
3063 * pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << PIX_FMT_RGB24);
3064 * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
3065 * @endcode
3066 *
f5bccd85
DB
3067 * @param[in] pix_fmt_mask bitmask determining which pixel format to choose from
3068 * @param[in] src_pix_fmt source pixel format
81299d42
PI
3069 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
3070 * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
3071 * @return The best pixel format to convert to or -1 if none was found.
392cf77a 3072 */
a61ec8e7 3073enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt,
fab21997
FB
3074 int has_alpha, int *loss_ptr);
3075
c3b95b1d
SS
3076
3077/**
3078 * Print in buf the string corresponding to the pixel format with
3079 * number pix_fmt, or an header if pix_fmt is negative.
3080 *
9bd51b9a
PI
3081 * @param[in] buf the buffer where to write the string
3082 * @param[in] buf_size the size of buf
3083 * @param[in] pix_fmt the number of the pixel format to print the corresponding info string, or
c3b95b1d
SS
3084 * a negative value to print the corresponding header.
3085 * Meaningful values for obtaining a pixel format info vary from 0 to PIX_FMT_NB -1.
3086 */
a61ec8e7 3087void avcodec_pix_fmt_string (char *buf, int buf_size, enum PixelFormat pix_fmt);
c3b95b1d 3088
0469baf1
FB
3089#define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
3090#define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
392cf77a
PI
3091
3092/**
3093 * Tell if an image really has transparent alpha values.
3094 * @return ored mask of FF_ALPHA_xxx constants
3095 */
da64ecc3 3096int img_get_alpha_info(const AVPicture *src,
a61ec8e7 3097 enum PixelFormat pix_fmt, int width, int height);
0469baf1 3098
219b06c6 3099/* deinterlace a picture */
392cf77a 3100/* deinterlace - if not supported return -1 */
da64ecc3 3101int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
a61ec8e7 3102 enum PixelFormat pix_fmt, int width, int height);
de6d9b64
FB
3103
3104/* external high level API */
3105
0334f799
SS
3106/**
3107 * If c is NULL, returns the first registered codec,
c1b02101 3108 * if c is non-NULL, returns the next registered codec after c,
0334f799
SS
3109 * or NULL if c is the last one.
3110 */
55b9e69a 3111AVCodec *av_codec_next(AVCodec *c);
de6d9b64 3112
96afa6be
SS
3113/**
3114 * Returns the LIBAVCODEC_VERSION_INT constant.
3115 */
51a49663 3116unsigned avcodec_version(void);
96afa6be 3117
f9ec0aa1 3118/**
c1736936
DB
3119 * Returns the libavcodec build-time configuration.
3120 */
41600690 3121const char *avcodec_configuration(void);
c1736936
DB
3122
3123/**
3124 * Returns the libavcodec license.
3125 */
41600690 3126const char *avcodec_license(void);
c1736936
DB
3127
3128/**
f9ec0aa1
PI
3129 * Initializes libavcodec.
3130 *
bf7e799c 3131 * @warning This function must be called before any other libavcodec
f9ec0aa1
PI
3132 * function.
3133 */
de6d9b64
FB
3134void avcodec_init(void);
3135
9d385cfe 3136#if LIBAVCODEC_VERSION_