Make DECLARE_ALIGNED macros work with external array specifiers
[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
98790382
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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
d140b025 33#define LIBAVCODEC_VERSION_MINOR 48
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,
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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,
a96b68b7 206
f5bccd85 207 /* various PCM "codecs" */
17179d2d 208 CODEC_ID_PCM_S16LE= 0x10000,
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209 CODEC_ID_PCM_S16BE,
210 CODEC_ID_PCM_U16LE,
211 CODEC_ID_PCM_U16BE,
212 CODEC_ID_PCM_S8,
213 CODEC_ID_PCM_U8,
214 CODEC_ID_PCM_MULAW,
215 CODEC_ID_PCM_ALAW,
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216 CODEC_ID_PCM_S32LE,
217 CODEC_ID_PCM_S32BE,
218 CODEC_ID_PCM_U32LE,
219 CODEC_ID_PCM_U32BE,
220 CODEC_ID_PCM_S24LE,
221 CODEC_ID_PCM_S24BE,
222 CODEC_ID_PCM_U24LE,
223 CODEC_ID_PCM_U24BE,
224 CODEC_ID_PCM_S24DAUD,
a11c2a2c 225 CODEC_ID_PCM_ZORK,
725d86bf 226 CODEC_ID_PCM_S16LE_PLANAR,
1472b7dd 227 CODEC_ID_PCM_DVD,
aa29709e 228 CODEC_ID_PCM_F32BE,
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229 CODEC_ID_PCM_F32LE,
230 CODEC_ID_PCM_F64BE,
231 CODEC_ID_PCM_F64LE,
5dd3707b 232 CODEC_ID_PCM_BLURAY,
0147f198 233
f5bccd85 234 /* various ADPCM codecs */
17179d2d 235 CODEC_ID_ADPCM_IMA_QT= 0x11000,
0147f198 236 CODEC_ID_ADPCM_IMA_WAV,
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237 CODEC_ID_ADPCM_IMA_DK3,
238 CODEC_ID_ADPCM_IMA_DK4,
2fdf638b 239 CODEC_ID_ADPCM_IMA_WS,
7d8379f2 240 CODEC_ID_ADPCM_IMA_SMJPEG,
0147f198 241 CODEC_ID_ADPCM_MS,
e2a7bb28 242 CODEC_ID_ADPCM_4XM,
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243 CODEC_ID_ADPCM_XA,
244 CODEC_ID_ADPCM_ADX,
7d8379f2 245 CODEC_ID_ADPCM_EA,
e5966052 246 CODEC_ID_ADPCM_G726,
b3bfb299 247 CODEC_ID_ADPCM_CT,
659c3692 248 CODEC_ID_ADPCM_SWF,
2ff4524e 249 CODEC_ID_ADPCM_YAMAHA,
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250 CODEC_ID_ADPCM_SBPRO_4,
251 CODEC_ID_ADPCM_SBPRO_3,
252 CODEC_ID_ADPCM_SBPRO_2,
d1e0d21f 253 CODEC_ID_ADPCM_THP,
3a7f5d07 254 CODEC_ID_ADPCM_IMA_AMV,
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255 CODEC_ID_ADPCM_EA_R1,
256 CODEC_ID_ADPCM_EA_R3,
257 CODEC_ID_ADPCM_EA_R2,
7bb65d89 258 CODEC_ID_ADPCM_IMA_EA_SEAD,
fac84d3c 259 CODEC_ID_ADPCM_IMA_EA_EACS,
271b4095 260 CODEC_ID_ADPCM_EA_XAS,
861c63a2 261 CODEC_ID_ADPCM_EA_MAXIS_XA,
055dc116 262 CODEC_ID_ADPCM_IMA_ISS,
891f64b3 263
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264 /* AMR */
265 CODEC_ID_AMR_NB= 0x12000,
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266 CODEC_ID_AMR_WB,
267
b8414bbd 268 /* RealAudio codecs*/
17179d2d 269 CODEC_ID_RA_144= 0x13000,
b8414bbd 270 CODEC_ID_RA_288,
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271
272 /* various DPCM codecs */
17179d2d 273 CODEC_ID_ROQ_DPCM= 0x14000,
3ef8be2b 274 CODEC_ID_INTERPLAY_DPCM,
9937e686 275 CODEC_ID_XAN_DPCM,
d08d7142 276 CODEC_ID_SOL_DPCM,
115329f1 277
ba0dabbf 278 /* audio codecs */
17179d2d 279 CODEC_ID_MP2= 0x15000,
0e373b95 280 CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3
17179d2d 281 CODEC_ID_AAC,
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282 CODEC_ID_AC3,
283 CODEC_ID_DTS,
284 CODEC_ID_VORBIS,
285 CODEC_ID_DVAUDIO,
286 CODEC_ID_WMAV1,
287 CODEC_ID_WMAV2,
288 CODEC_ID_MACE3,
289 CODEC_ID_MACE6,
290 CODEC_ID_VMDAUDIO,
291 CODEC_ID_SONIC,
292 CODEC_ID_SONIC_LS,
ac2570a8 293 CODEC_ID_FLAC,
1ede228a 294 CODEC_ID_MP3ADU,
d2a7718d 295 CODEC_ID_MP3ON4,
85ad5695 296 CODEC_ID_SHORTEN,
5df8a0c6 297 CODEC_ID_ALAC,
034eeaa1 298 CODEC_ID_WESTWOOD_SND1,
0e373b95 299 CODEC_ID_GSM, ///< as in Berlin toast format
d9b1c197 300 CODEC_ID_QDM2,
e0f7e329 301 CODEC_ID_COOK,
bf3027c8 302 CODEC_ID_TRUESPEECH,
a24c4a2a 303 CODEC_ID_TTA,
348efc18 304 CODEC_ID_SMACKAUDIO,
6c496518 305 CODEC_ID_QCELP,
730581f3 306 CODEC_ID_WAVPACK,
72450e50 307 CODEC_ID_DSICINAUDIO,
84ed36da 308 CODEC_ID_IMC,
185c7b6b 309 CODEC_ID_MUSEPACK7,
aad512b4 310 CODEC_ID_MLP,
f5bccd85 311 CODEC_ID_GSM_MS, /* as found in WAV */
10e26bc7 312 CODEC_ID_ATRAC3,
8950f828 313 CODEC_ID_VOXWARE,
bf4a1f17 314 CODEC_ID_APE,
636b13c5 315 CODEC_ID_NELLYMOSER,
12877faf 316 CODEC_ID_MUSEPACK8,
cb4ddf77 317 CODEC_ID_SPEEX,
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318 CODEC_ID_WMAVOICE,
319 CODEC_ID_WMAPRO,
800b9c24 320 CODEC_ID_WMALOSSLESS,
b339f0c6 321 CODEC_ID_ATRAC3P,
2988c93d 322 CODEC_ID_EAC3,
faeedbbb 323 CODEC_ID_SIPR,
7f507b2d 324 CODEC_ID_MP1,
616e899c 325 CODEC_ID_TWINVQ,
9ba4821d 326 CODEC_ID_TRUEHD,
b24bbbb4 327 CODEC_ID_MP4ALS,
223e8df1 328 CODEC_ID_ATRAC1,
115329f1 329
240c1657 330 /* subtitle codecs */
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331 CODEC_ID_DVD_SUBTITLE= 0x17000,
332 CODEC_ID_DVB_SUBTITLE,
0e373b95 333 CODEC_ID_TEXT, ///< raw UTF-8 text
7e2643ae 334 CODEC_ID_XSUB,
f9a9b350 335 CODEC_ID_SSA,
cc8c2c6a 336 CODEC_ID_MOV_TEXT,
c58b82a2 337 CODEC_ID_HDMV_PGS_SUBTITLE,
e58992e4 338 CODEC_ID_DVB_TELETEXT,
115329f1 339
7ce68923 340 /* other specific kind of codecs (generally used for attachments) */
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341 CODEC_ID_TTF= 0x18000,
342
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343 CODEC_ID_PROBE= 0x19000, ///< codec_id is not known (like CODEC_ID_NONE) but lavf should attempt to identify it
344
0e373b95 345 CODEC_ID_MPEG2TS= 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS
f5bccd85 346 * stream (only used by libavformat) */
de6d9b64 347};
dcedf586 348
de6d9b64 349enum CodecType {
4a663d80 350 CODEC_TYPE_UNKNOWN = -1,
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351 CODEC_TYPE_VIDEO,
352 CODEC_TYPE_AUDIO,
985180a1 353 CODEC_TYPE_DATA,
240c1657 354 CODEC_TYPE_SUBTITLE,
f8d7c9d3 355 CODEC_TYPE_ATTACHMENT,
9ff77d17 356 CODEC_TYPE_NB
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357};
358
0e373b95 359/**
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360 * all in native-endian format
361 */
a96b68b7 362enum SampleFormat {
9076fee4 363 SAMPLE_FMT_NONE = -1,
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364 SAMPLE_FMT_U8, ///< unsigned 8 bits
365 SAMPLE_FMT_S16, ///< signed 16 bits
115329f1 366 SAMPLE_FMT_S32, ///< signed 32 bits
a3a5f4d6 367 SAMPLE_FMT_FLT, ///< float
e06b00f3 368 SAMPLE_FMT_DBL, ///< double
88a07af7 369 SAMPLE_FMT_NB ///< Number of sample formats. DO NOT USE if dynamically linking to libavcodec
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370};
371
0d72e7d0 372/* Audio channel masks */
9d9b9d32
373#define CH_FRONT_LEFT 0x00000001
374#define CH_FRONT_RIGHT 0x00000002
375#define CH_FRONT_CENTER 0x00000004
376#define CH_LOW_FREQUENCY 0x00000008
377#define CH_BACK_LEFT 0x00000010
378#define CH_BACK_RIGHT 0x00000020
379#define CH_FRONT_LEFT_OF_CENTER 0x00000040
380#define CH_FRONT_RIGHT_OF_CENTER 0x00000080
381#define CH_BACK_CENTER 0x00000100
382#define CH_SIDE_LEFT 0x00000200
383#define CH_SIDE_RIGHT 0x00000400
384#define CH_TOP_CENTER 0x00000800
385#define CH_TOP_FRONT_LEFT 0x00001000
386#define CH_TOP_FRONT_CENTER 0x00002000
387#define CH_TOP_FRONT_RIGHT 0x00004000
388#define CH_TOP_BACK_LEFT 0x00008000
389#define CH_TOP_BACK_CENTER 0x00010000
390#define CH_TOP_BACK_RIGHT 0x00020000
391#define CH_STEREO_LEFT 0x20000000 ///< Stereo downmix.
392#define CH_STEREO_RIGHT 0x40000000 ///< See CH_STEREO_LEFT.
0d72e7d0 393
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394/** Channel mask value used for AVCodecContext.request_channel_layout
395 to indicate that the user requests the channel order of the decoder output
396 to be the native codec channel order. */
397#define CH_LAYOUT_NATIVE 0x8000000000000000LL
398
0d72e7d0 399/* Audio channel convenience macros */
9d9b9d32
400#define CH_LAYOUT_MONO (CH_FRONT_CENTER)
401#define CH_LAYOUT_STEREO (CH_FRONT_LEFT|CH_FRONT_RIGHT)
1b7bc4a2 402#define CH_LAYOUT_2_1 (CH_LAYOUT_STEREO|CH_BACK_CENTER)
9d9b9d32 403#define CH_LAYOUT_SURROUND (CH_LAYOUT_STEREO|CH_FRONT_CENTER)
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404#define CH_LAYOUT_4POINT0 (CH_LAYOUT_SURROUND|CH_BACK_CENTER)
405#define CH_LAYOUT_2_2 (CH_LAYOUT_STEREO|CH_SIDE_LEFT|CH_SIDE_RIGHT)
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406#define CH_LAYOUT_QUAD (CH_LAYOUT_STEREO|CH_BACK_LEFT|CH_BACK_RIGHT)
407#define CH_LAYOUT_5POINT0 (CH_LAYOUT_SURROUND|CH_SIDE_LEFT|CH_SIDE_RIGHT)
408#define CH_LAYOUT_5POINT1 (CH_LAYOUT_5POINT0|CH_LOW_FREQUENCY)
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409#define CH_LAYOUT_5POINT0_BACK (CH_LAYOUT_SURROUND|CH_BACK_LEFT|CH_BACK_RIGHT)
410#define CH_LAYOUT_5POINT1_BACK (CH_LAYOUT_5POINT0_BACK|CH_LOW_FREQUENCY)
5dd3707b 411#define CH_LAYOUT_7POINT0 (CH_LAYOUT_5POINT0|CH_BACK_LEFT|CH_BACK_RIGHT)
9d9b9d32 412#define CH_LAYOUT_7POINT1 (CH_LAYOUT_5POINT1|CH_BACK_LEFT|CH_BACK_RIGHT)
8613af0a 413#define CH_LAYOUT_7POINT1_WIDE (CH_LAYOUT_5POINT1_BACK|\
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414 CH_FRONT_LEFT_OF_CENTER|CH_FRONT_RIGHT_OF_CENTER)
415#define CH_LAYOUT_STEREO_DOWNMIX (CH_STEREO_LEFT|CH_STEREO_RIGHT)
0d72e7d0 416
de6d9b64 417/* in bytes */
8170e5fb 418#define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
de6d9b64 419
d7425f59 420/**
cf713bb8 421 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
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422 * This is mainly needed because some optimized bitstream readers read
423 * 32 or 64 bit at once and could read over the end.<br>
424 * Note: If the first 23 bits of the additional bytes are not 0, then damaged
425 * MPEG bitstreams could cause overread and segfault.
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426 */
427#define FF_INPUT_BUFFER_PADDING_SIZE 8
428
0ecca7a4 429/**
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430 * minimum encoding buffer size
431 * Used to avoid some checks during header writing.
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432 */
433#define FF_MIN_BUFFER_SIZE 16384
434
47146dfb 435
0e373b95 436/**
bafc102b 437 * motion estimation type.
0e373b95 438 */
e4986da9 439enum Motion_Est_ID {
9b4dd1b8 440 ME_ZERO = 1, ///< no search, that is use 0,0 vector whenever one is needed
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441 ME_FULL,
442 ME_LOG,
443 ME_PHODS,
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444 ME_EPZS, ///< enhanced predictive zonal search
445 ME_X1, ///< reserved for experiments
446 ME_HEX, ///< hexagon based search
447 ME_UMH, ///< uneven multi-hexagon search
448 ME_ITER, ///< iterative search
359bbdab 449 ME_TESA, ///< transformed exhaustive search algorithm
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450};
451
8c3eba7c 452enum AVDiscard{
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453 /* We leave some space between them for extensions (drop some
454 * keyframes for intra-only or drop just some bidir frames). */
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455 AVDISCARD_NONE =-16, ///< discard nothing
456 AVDISCARD_DEFAULT= 0, ///< discard useless packets like 0 size packets in avi
457 AVDISCARD_NONREF = 8, ///< discard all non reference
458 AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
459 AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
460 AVDISCARD_ALL = 48, ///< discard all
461};
462
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MN
463enum AVColorPrimaries{
464 AVCOL_PRI_BT709 =1, ///< also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP177 Annex B
465 AVCOL_PRI_UNSPECIFIED=2,
466 AVCOL_PRI_BT470M =4,
467 AVCOL_PRI_BT470BG =5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM
468 AVCOL_PRI_SMPTE170M =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC
469 AVCOL_PRI_SMPTE240M =7, ///< functionally identical to above
470 AVCOL_PRI_FILM =8,
471 AVCOL_PRI_NB , ///< Not part of ABI
472};
473
474enum AVColorTransferCharacteristic{
475 AVCOL_TRC_BT709 =1, ///< also ITU-R BT1361
476 AVCOL_TRC_UNSPECIFIED=2,
477 AVCOL_TRC_GAMMA22 =4, ///< also ITU-R BT470M / ITU-R BT1700 625 PAL & SECAM
478 AVCOL_TRC_GAMMA28 =5, ///< also ITU-R BT470BG
479 AVCOL_TRC_NB , ///< Not part of ABI
480};
481
482enum AVColorSpace{
483 AVCOL_SPC_RGB =0,
484 AVCOL_SPC_BT709 =1, ///< also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
485 AVCOL_SPC_UNSPECIFIED=2,
486 AVCOL_SPC_FCC =4,
487 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
488 AVCOL_SPC_SMPTE170M =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC / functionally identical to above
489 AVCOL_SPC_SMPTE240M =7,
490 AVCOL_SPC_NB , ///< Not part of ABI
491};
492
493enum AVColorRange{
494 AVCOL_RANGE_UNSPECIFIED=0,
495 AVCOL_RANGE_MPEG =1, ///< the normal 219*2^(n-8) "MPEG" YUV ranges
496 AVCOL_RANGE_JPEG =2, ///< the normal 2^n-1 "JPEG" YUV ranges
497 AVCOL_RANGE_NB , ///< Not part of ABI
498};
499
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500/**
501 * X X 3 4 X X are luma samples,
502 * 1 2 1-6 are possible chroma positions
503 * X X 5 6 X 0 is undefined/unknown position
504 */
505enum AVChromaLocation{
506 AVCHROMA_LOC_UNSPECIFIED=0,
507 AVCHROMA_LOC_LEFT =1, ///< mpeg2/4, h264 default
508 AVCHROMA_LOC_CENTER =2, ///< mpeg1, jpeg, h263
509 AVCHROMA_LOC_TOPLEFT =3, ///< DV
510 AVCHROMA_LOC_TOP =4,
511 AVCHROMA_LOC_BOTTOMLEFT =5,
512 AVCHROMA_LOC_BOTTOM =6,
513 AVCHROMA_LOC_NB , ///< Not part of ABI
514};
515
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516typedef struct RcOverride{
517 int start_frame;
518 int end_frame;
f5bccd85 519 int qscale; // If this is 0 then quality_factor will be used instead.
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520 float quality_factor;
521} RcOverride;
522
b0ec9efd 523#define FF_MAX_B_FRAMES 16
9dbcbd92 524
a949d72e 525/* encoding support
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526 These flags can be passed in AVCodecContext.flags before initialization.
527 Note: Not everything is supported yet.
a949d72e 528*/
de6d9b64 529
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530#define CODEC_FLAG_QSCALE 0x0002 ///< Use fixed qscale.
531#define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / advanced prediction for H.263.
532#define CODEC_FLAG_QPEL 0x0010 ///< Use qpel MC.
533#define CODEC_FLAG_GMC 0x0020 ///< Use GMC.
534#define CODEC_FLAG_MV0 0x0040 ///< Always try a MB with MV=<0,0>.
535#define CODEC_FLAG_PART 0x0080 ///< Use data partitioning.
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536/**
537 * The parent program guarantees that the input for B-frames containing
f5bccd85 538 * streams is not written to for at least s->max_b_frames+1 frames, if
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539 * this is not set the input will be copied.
540 */
8b4c7dbc 541#define CODEC_FLAG_INPUT_PRESERVED 0x0100
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542#define CODEC_FLAG_PASS1 0x0200 ///< Use internal 2pass ratecontrol in first pass mode.
543#define CODEC_FLAG_PASS2 0x0400 ///< Use internal 2pass ratecontrol in second pass mode.
544#define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< Use external Huffman table (for MJPEG).
545#define CODEC_FLAG_GRAY 0x2000 ///< Only decode/encode grayscale.
546#define CODEC_FLAG_EMU_EDGE 0x4000 ///< Don't draw edges.
547#define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding.
548#define CODEC_FLAG_TRUNCATED 0x00010000 /** Input bitstream might be truncated at a random
549 location instead of only at frame boundaries. */
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550#define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< Normalize adaptive quantization.
551#define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT.
552#define CODEC_FLAG_LOW_DELAY 0x00080000 ///< Force low delay.
553#define CODEC_FLAG_ALT_SCAN 0x00100000 ///< Use alternate scan.
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554#define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< Place global headers in extradata instead of every keyframe.
555#define CODEC_FLAG_BITEXACT 0x00800000 ///< Use only bitexact stuff (except (I)DCT).
21e59552 556/* Fx : Flag for h263+ extra options */
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557#define CODEC_FLAG_AC_PRED 0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction
558#define CODEC_FLAG_H263P_UMV 0x02000000 ///< unlimited motion vector
559#define CODEC_FLAG_CBP_RD 0x04000000 ///< Use rate distortion optimization for cbp.
560#define CODEC_FLAG_QP_RD 0x08000000 ///< Use rate distortion optimization for qp selectioon.
561#define CODEC_FLAG_H263P_AIV 0x00000008 ///< H.263 alternative inter VLC
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562#define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
563#define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
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564#define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
565#define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
f5bccd85 566#define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< Will reserve space for SVCD scan offset user data.
f3eec1cf 567#define CODEC_FLAG_CLOSED_GOP 0x80000000
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568#define CODEC_FLAG2_FAST 0x00000001 ///< Allow non spec compliant speedup tricks.
569#define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< Strictly enforce GOP size.
570#define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< Skip bitstream encoding.
571#define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< Place global headers at every keyframe instead of in extradata.
572#define CODEC_FLAG2_BPYRAMID 0x00000010 ///< H.264 allow B-frames to be used as references.
573#define CODEC_FLAG2_WPRED 0x00000020 ///< H.264 weighted biprediction for B-frames
d3075ed5 574#define CODEC_FLAG2_MIXED_REFS 0x00000040 ///< H.264 one reference per partition, as opposed to one reference per macroblock
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575#define CODEC_FLAG2_8X8DCT 0x00000080 ///< H.264 high profile 8x8 transform
576#define CODEC_FLAG2_FASTPSKIP 0x00000100 ///< H.264 fast pskip
577#define CODEC_FLAG2_AUD 0x00000200 ///< H.264 access unit delimiters
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578#define CODEC_FLAG2_BRDO 0x00000400 ///< B-frame rate-distortion optimization
579#define CODEC_FLAG2_INTRA_VLC 0x00000800 ///< Use MPEG-2 intra VLC table.
580#define CODEC_FLAG2_MEMC_ONLY 0x00001000 ///< Only do ME/MC (I frames -> ref, P frame -> ME+MC).
581#define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format.
582#define CODEC_FLAG2_SKIP_RD 0x00004000 ///< RD optimal MB level residual skipping
583#define CODEC_FLAG2_CHUNKS 0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
584#define CODEC_FLAG2_NON_LINEAR_QUANT 0x00010000 ///< Use MPEG-2 nonlinear quantizer.
f1618fd9 585#define CODEC_FLAG2_BIT_RESERVOIR 0x00020000 ///< Use a bit reservoir when encoding if possible
25a42948 586#define CODEC_FLAG2_MBTREE 0x00040000 ///< Use macroblock tree ratecontrol (x264 only)
6fc5b059 587
21e59552 588/* Unsupported options :
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589 * Syntax Arithmetic coding (SAC)
590 * Reference Picture Selection
eafcac6a 591 * Independent Segment Decoding */
21e59552 592/* /Fx */
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593/* codec capabilities */
594
f5bccd85 595#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback.
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596/**
597 * Codec uses get_buffer() for allocating buffers.
598 * direct rendering method 1
599 */
600#define CODEC_CAP_DR1 0x0002
f5bccd85 601/* If 'parse_only' field is true, then avcodec_parse_frame() can be used. */
917e06c8 602#define CODEC_CAP_PARSE_ONLY 0x0004
d7425f59 603#define CODEC_CAP_TRUNCATED 0x0008
f5bccd85 604/* Codec can export data for HW decoding (XvMC). */
5e5c247a 605#define CODEC_CAP_HWACCEL 0x0010
115329f1 606/**
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607 * Codec has a nonzero delay and needs to be fed with NULL at the end to get the delayed data.
608 * If this is not set, the codec is guaranteed to never be fed with NULL data.
934982c4 609 */
6f824977 610#define CODEC_CAP_DELAY 0x0020
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611/**
612 * Codec can be fed a final frame with a smaller size.
613 * This can be used to prevent truncation of the last audio samples.
614 */
615#define CODEC_CAP_SMALL_LAST_FRAME 0x0040
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616/**
617 * Codec can export data for HW decoding (VDPAU).
618 */
619#define CODEC_CAP_HWACCEL_VDPAU 0x0080
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620/**
621 * Codec can output multiple frames per AVPacket
622 */
623#define CODEC_CAP_SUBFRAMES 0x0100
bf89e6b1 624
f5bccd85 625//The following defines may change, don't expect compatibility if you use them.
8d7ec294 626#define MB_TYPE_INTRA4x4 0x0001
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627#define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
628#define MB_TYPE_INTRA_PCM 0x0004 //FIXME H.264-specific
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629#define MB_TYPE_16x16 0x0008
630#define MB_TYPE_16x8 0x0010
631#define MB_TYPE_8x16 0x0020
632#define MB_TYPE_8x8 0x0040
633#define MB_TYPE_INTERLACED 0x0080
273b0cd3 634#define MB_TYPE_DIRECT2 0x0100 //FIXME
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635#define MB_TYPE_ACPRED 0x0200
636#define MB_TYPE_GMC 0x0400
637#define MB_TYPE_SKIP 0x0800
638#define MB_TYPE_P0L0 0x1000
639#define MB_TYPE_P1L0 0x2000
640#define MB_TYPE_P0L1 0x4000
641#define MB_TYPE_P1L1 0x8000
642#define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
643#define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
644#define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
645#define MB_TYPE_QUANT 0x00010000
646#define MB_TYPE_CBP 0x00020000
647//Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
648
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649/**
650 * Pan Scan area.
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651 * This specifies the area which should be displayed.
652 * Note there may be multiple such areas for one frame.
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653 */
654typedef struct AVPanScan{
655 /**
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DB
656 * id
657 * - encoding: Set by user.
658 * - decoding: Set by libavcodec.
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659 */
660 int id;
661
662 /**
663 * width and height in 1/16 pel
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DB
664 * - encoding: Set by user.
665 * - decoding: Set by libavcodec.
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666 */
667 int width;
668 int height;
669
670 /**
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671 * position of the top left corner in 1/16 pel for up to 3 fields/frames
672 * - encoding: Set by user.
673 * - decoding: Set by libavcodec.
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674 */
675 int16_t position[3][2];
676}AVPanScan;
677
492cd3a9 678#define FF_COMMON_FRAME \
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679 /**\
680 * pointer to the picture planes.\
f5bccd85 681 * This might be different from the first allocated byte\
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682 * - encoding: \
683 * - decoding: \
684 */\
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685 uint8_t *data[4];\
686 int linesize[4];\
687 /**\
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688 * pointer to the first allocated byte of the picture. Can be used in get_buffer/release_buffer.\
689 * This isn't used by libavcodec unless the default get/release_buffer() is used.\
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690 * - encoding: \
691 * - decoding: \
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692 */\
693 uint8_t *base[4];\
694 /**\
695 * 1 -> keyframe, 0-> not\
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696 * - encoding: Set by libavcodec.\
697 * - decoding: Set by libavcodec.\
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698 */\
699 int key_frame;\
700\
701 /**\
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702 * Picture type of the frame, see ?_TYPE below.\
703 * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
704 * - decoding: Set by libavcodec.\
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705 */\
706 int pict_type;\
707\
708 /**\
c0df9d75 709 * presentation timestamp in time_base units (time when frame should be shown to user)\
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710 * If AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed.\
711 * - encoding: MUST be set by user.\
712 * - decoding: Set by libavcodec.\
1e491e29 713 */\
be6784dc 714 int64_t pts;\
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715\
716 /**\
f5bccd85 717 * picture number in bitstream order\
64863965 718 * - encoding: set by\
f5bccd85 719 * - decoding: Set by libavcodec.\
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720 */\
721 int coded_picture_number;\
722 /**\
f5bccd85 723 * picture number in display order\
64863965 724 * - encoding: set by\
f5bccd85 725 * - decoding: Set by libavcodec.\
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726 */\
727 int display_picture_number;\
728\
729 /**\
158c7f05 730 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
f5bccd85
DB
731 * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
732 * - decoding: Set by libavcodec.\
1e491e29 733 */\
158c7f05 734 int quality; \
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735\
736 /**\
737 * buffer age (1->was last buffer and dint change, 2->..., ...).\
f5bccd85 738 * Set to INT_MAX if the buffer has not been used yet.\
64863965 739 * - encoding: unused\
f5bccd85 740 * - decoding: MUST be set by get_buffer().\
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741 */\
742 int age;\
743\
744 /**\
745 * is this picture used as reference\
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746 * The values for this are the same as the MpegEncContext.picture_structure\
747 * variable, that is 1->top field, 2->bottom field, 3->frame/both fields.\
5fe2a515 748 * Set to 4 for delayed, non-reference frames.\
64863965 749 * - encoding: unused\
f5bccd85 750 * - decoding: Set by libavcodec. (before get_buffer() call)).\
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751 */\
752 int reference;\
753\
754 /**\
755 * QP table\
64863965 756 * - encoding: unused\
f5bccd85 757 * - decoding: Set by libavcodec.\
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758 */\
759 int8_t *qscale_table;\
760 /**\
761 * QP store stride\
64863965 762 * - encoding: unused\
f5bccd85 763 * - decoding: Set by libavcodec.\
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764 */\
765 int qstride;\
766\
767 /**\
f5bccd85 768 * mbskip_table[mb]>=1 if MB didn't change\
1e491e29 769 * stride= mb_width = (width+15)>>4\
64863965 770 * - encoding: unused\
f5bccd85 771 * - decoding: Set by libavcodec.\
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772 */\
773 uint8_t *mbskip_table;\
774\
775 /**\
f5bccd85 776 * motion vector table\
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777 * @code\
778 * example:\
779 * int mv_sample_log2= 4 - motion_subsample_log2;\
780 * int mb_width= (width+15)>>4;\
781 * int mv_stride= (mb_width << mv_sample_log2) + 1;\
782 * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
783 * @endcode\
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784 * - encoding: Set by user.\
785 * - decoding: Set by libavcodec.\
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WH
786 */\
787 int16_t (*motion_val[2])[2];\
788\
789 /**\
f5bccd85 790 * macroblock type table\
8d7ec294 791 * mb_type_base + mb_width + 2\
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DB
792 * - encoding: Set by user.\
793 * - decoding: Set by libavcodec.\
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794 */\
795 uint32_t *mb_type;\
796\
797 /**\
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MN
798 * log2 of the size of the block which a single vector in motion_val represents: \
799 * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
8d7ec294 800 * - encoding: unused\
f5bccd85 801 * - decoding: Set by libavcodec.\
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802 */\
803 uint8_t motion_subsample_log2;\
804\
805 /**\
1e491e29 806 * for some private data of the user\
64863965 807 * - encoding: unused\
f5bccd85 808 * - decoding: Set by user.\
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809 */\
810 void *opaque;\
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811\
812 /**\
813 * error\
f5bccd85 814 * - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR.\
64863965 815 * - decoding: unused\
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816 */\
817 uint64_t error[4];\
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818\
819 /**\
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DB
820 * type of the buffer (to keep track of who has to deallocate data[*])\
821 * - encoding: Set by the one who allocates it.\
822 * - decoding: Set by the one who allocates it.\
823 * Note: User allocated (direct rendering) & internal buffers cannot coexist currently.\
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824 */\
825 int type;\
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826 \
827 /**\
f5bccd85 828 * When decoding, this signals how much the picture must be delayed.\
2ec23b6d 829 * extra_delay = repeat_pict / (2*fps)\
64863965 830 * - encoding: unused\
f5bccd85 831 * - decoding: Set by libavcodec.\
2ec23b6d 832 */\
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833 int repeat_pict;\
834 \
835 /**\
836 * \
837 */\
838 int qscale_type;\
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RS
839 \
840 /**\
841 * The content of the picture is interlaced.\
f5bccd85
DB
842 * - encoding: Set by user.\
843 * - decoding: Set by libavcodec. (default 0)\
2744ca9a
RS
844 */\
845 int interlaced_frame;\
846 \
847 /**\
f5bccd85
DB
848 * If the content is interlaced, is top field displayed first.\
849 * - encoding: Set by user.\
850 * - decoding: Set by libavcodec.\
2744ca9a 851 */\
9dad924e 852 int top_field_first;\
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853 \
854 /**\
855 * Pan scan.\
f5bccd85
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856 * - encoding: Set by user.\
857 * - decoding: Set by libavcodec.\
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858 */\
859 AVPanScan *pan_scan;\
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860 \
861 /**\
f5bccd85 862 * Tell user application that palette has changed from previous frame.\
2a2bbcb0 863 * - encoding: ??? (no palette-enabled encoder yet)\
f5bccd85 864 * - decoding: Set by libavcodec. (default 0).\
2a2bbcb0
MM
865 */\
866 int palette_has_changed;\
074c4ca7
RT
867 \
868 /**\
f5bccd85 869 * codec suggestion on buffer type if != 0\
074c4ca7 870 * - encoding: unused\
f5bccd85 871 * - decoding: Set by libavcodec. (before get_buffer() call)).\
074c4ca7
RT
872 */\
873 int buffer_hints;\
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874\
875 /**\
f5bccd85 876 * DCT coefficients\
8289c6fa 877 * - encoding: unused\
f5bccd85 878 * - decoding: Set by libavcodec.\
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879 */\
880 short *dct_coeff;\
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MN
881\
882 /**\
f5bccd85
DB
883 * motion referece frame index\
884 * - encoding: Set by user.\
885 * - decoding: Set by libavcodec.\
a4d36c11 886 */\
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887 int8_t *ref_index[2];\
888\
889 /**\
890 * reordered opaque 64bit number (generally a PTS) from AVCodecContext.reordered_opaque\
891 * output in AVFrame.reordered_opaque\
892 * - encoding: unused\
893 * - decoding: Read by user.\
894 */\
895 int64_t reordered_opaque;\
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GB
896\
897 /**\
898 * hardware accelerator private data (FFmpeg allocated)\
899 * - encoding: unused\
900 * - decoding: Set by libavcodec\
901 */\
952e2083 902 void *hwaccel_picture_private;\
79de84f2 903
2ec23b6d 904
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DB
905#define FF_QSCALE_TYPE_MPEG1 0
906#define FF_QSCALE_TYPE_MPEG2 1
907#define FF_QSCALE_TYPE_H264 2
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908
909#define FF_BUFFER_TYPE_INTERNAL 1
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910#define FF_BUFFER_TYPE_USER 2 ///< direct rendering buffers (image is (de)allocated by user)
911#define FF_BUFFER_TYPE_SHARED 4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared.
912#define FF_BUFFER_TYPE_COPY 8 ///< Just a (modified) copy of some other buffer, don't deallocate anything.
4e00e76b 913
1e491e29 914
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915#define FF_I_TYPE 1 ///< Intra
916#define FF_P_TYPE 2 ///< Predicted
917#define FF_B_TYPE 3 ///< Bi-dir predicted
918#define FF_S_TYPE 4 ///< S(GMC)-VOP MPEG4
919#define FF_SI_TYPE 5 ///< Switching Intra
920#define FF_SP_TYPE 6 ///< Switching Predicted
48d533e6 921#define FF_BI_TYPE 7
1e491e29 922
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923#define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore).
924#define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer.
925#define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content.
926#define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update).
074c4ca7 927
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TB
928typedef struct AVPacket {
929 /**
7b356d39
RS
930 * Presentation timestamp in AVStream->time_base units; the time at which
931 * the decompressed packet will be presented to the user.
18c915ee
TB
932 * Can be AV_NOPTS_VALUE if it is not stored in the file.
933 * pts MUST be larger or equal to dts as presentation cannot happen before
934 * decompression, unless one wants to view hex dumps. Some formats misuse
935 * the terms dts and pts/cts to mean something different. Such timestamps
936 * must be converted to true pts/dts before they are stored in AVPacket.
937 */
938 int64_t pts;
939 /**
7b356d39
RS
940 * Decompression timestamp in AVStream->time_base units; the time at which
941 * the packet is decompressed.
18c915ee
TB
942 * Can be AV_NOPTS_VALUE if it is not stored in the file.
943 */
944 int64_t dts;
945 uint8_t *data;
946 int size;
947 int stream_index;
948 int flags;
949 /**
7b356d39 950 * Duration of this packet in AVStream->time_base units, 0 if unknown.
18c915ee
TB
951 * Equals next_pts - this_pts in presentation order.
952 */
953 int duration;
954 void (*destruct)(struct AVPacket *);
955 void *priv;
956 int64_t pos; ///< byte position in stream, -1 if unknown
957
958 /**
7b356d39 959 * Time difference in AVStream->time_base units from the pts of this
18c915ee
TB
960 * packet to the point at which the output from the decoder has converged
961 * independent from the availability of previous frames. That is, the
962 * frames are virtually identical no matter if decoding started from
963 * the very first frame or from this keyframe.
964 * Is AV_NOPTS_VALUE if unknown.
965 * This field is not the display duration of the current packet.
966 *
967 * The purpose of this field is to allow seeking in streams that have no
968 * keyframes in the conventional sense. It corresponds to the
969 * recovery point SEI in H.264 and match_time_delta in NUT. It is also
970 * essential for some types of subtitle streams to ensure that all
971 * subtitles are correctly displayed after seeking.
972 */
973 int64_t convergence_duration;
974} AVPacket;
8f3f2e06
RD
975#define AV_PKT_FLAG_KEY 0x0001
976#if LIBAVCODEC_VERSION_MAJOR < 53
977#define PKT_FLAG_KEY AV_PKT_FLAG_KEY
978#endif
18c915ee 979
0da71265
MN
980/**
981 * Audio Video Frame.
ba66ae94
MN
982 * New fields can be added to the end of FF_COMMON_FRAME with minor version
983 * bumps.
8bfb108b 984 * Removal, reordering and changes to existing fields require a major
ba66ae94
MN
985 * version bump. No fields should be added into AVFrame before or after
986 * FF_COMMON_FRAME!
8bfb108b 987 * sizeof(AVFrame) must not be used outside libav*.
0da71265 988 */
492cd3a9
MN
989typedef struct AVFrame {
990 FF_COMMON_FRAME
991} AVFrame;
1e491e29 992
d33c949c 993/**
252f17e2
MN
994 * main external API structure.
995 * New fields can be added to the end with minor version bumps.
8bfb108b 996 * Removal, reordering and changes to existing fields require a major
252f17e2 997 * version bump.
8bfb108b 998 * sizeof(AVCodecContext) must not be used outside libav*.
d33c949c 999 */
de6d9b64 1000typedef struct AVCodecContext {
b71901e6 1001 /**
f5bccd85 1002 * information on struct for av_log
bc874dae
MB
1003 * - set by avcodec_alloc_context
1004 */
d42a814e 1005 const AVClass *av_class;
bc874dae 1006 /**
f5bccd85
DB
1007 * the average bitrate
1008 * - encoding: Set by user; unused for constant quantizer encoding.
1009 * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.
b71901e6 1010 */
de6d9b64 1011 int bit_rate;
b71901e6
MN
1012
1013 /**
64863965 1014 * number of bits the bitstream is allowed to diverge from the reference.
b71901e6 1015 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
f5bccd85 1016 * - encoding: Set by user; unused for constant quantizer encoding.
64863965 1017 * - decoding: unused
b71901e6 1018 */
115329f1 1019 int bit_rate_tolerance;
b71901e6
MN
1020
1021 /**
64863965 1022 * CODEC_FLAG_*.
f5bccd85
DB
1023 * - encoding: Set by user.
1024 * - decoding: Set by user.
b71901e6 1025 */
de6d9b64 1026 int flags;
b71901e6
MN
1027
1028 /**
f5bccd85
DB
1029 * Some codecs need additional format info. It is stored here.
1030 * If any muxer uses this then ALL demuxers/parsers AND encoders for the
1031 * specific codec MUST set it correctly otherwise stream copy breaks.
1032 * In general use of this field by muxers is not recommanded.
1033 * - encoding: Set by libavcodec.
1034 * - decoding: Set by libavcodec. (FIXME: Is this OK?)
b71901e6
MN
1035 */
1036 int sub_id;
1037
1038 /**
f5bccd85 1039 * Motion estimation algorithm used for video coding.
58f7833e 1040 * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
89223ef6 1041 * 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific]
64863965
MN
1042 * - encoding: MUST be set by user.
1043 * - decoding: unused
b71901e6
MN
1044 */
1045 int me_method;
1046
1047 /**
f5bccd85
DB
1048 * some codecs need / can use extradata like Huffman tables.
1049 * mjpeg: Huffman tables
b71901e6 1050 * rv10: additional flags
b704e742 1051 * mpeg4: global headers (they can be in the bitstream or here)
f5bccd85
DB
1052 * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
1053 * than extradata_size to avoid prolems if it is read with the bitstream reader.
1054 * The bytewise contents of extradata must not depend on the architecture or CPU endianness.
1055 * - encoding: Set/allocated/freed by libavcodec.
1056 * - decoding: Set/allocated/freed by user.
b71901e6 1057 */
58f2a4b0 1058 uint8_t *extradata;
e84c31dc 1059 int extradata_size;
115329f1 1060
b71901e6 1061 /**
f5bccd85
DB
1062 * This is the fundamental unit of time (in seconds) in terms
1063 * of which frame timestamps are represented. For fixed-fps content,
5b28c8c3
MN
1064 * timebase should be 1/framerate and timestamp increments should be
1065 * identically 1.
f5bccd85
DB
1066 * - encoding: MUST be set by user.
1067 * - decoding: Set by libavcodec.
b71901e6 1068 */
c0df9d75 1069 AVRational time_base;
115329f1 1070
5b28c8c3 1071 /* video only */
14bea432 1072 /**
21adafec 1073 * picture width / height.
115329f1 1074 * - encoding: MUST be set by user.
f5bccd85
DB
1075 * - decoding: Set by libavcodec.
1076 * Note: For compatibility it is possible to set this instead of
1077 * coded_width/height before decoding.
b71901e6 1078 */
de6d9b64 1079 int width, height;
115329f1 1080
e769f053 1081#define FF_ASPECT_EXTENDED 15
b71901e6
MN
1082
1083 /**
f5bccd85
DB
1084 * the number of pictures in a group of pictures, or 0 for intra_only
1085 * - encoding: Set by user.
64863965 1086 * - decoding: unused
b71901e6
MN
1087 */
1088 int gop_size;
1089
1090 /**
f5bccd85
DB
1091 * Pixel format, see PIX_FMT_xxx.
1092 * - encoding: Set by user.
1093 * - decoding: Set by libavcodec.
b71901e6 1094 */
e4eadb4b 1095 enum PixelFormat pix_fmt;
115329f1 1096
bdfcbbed 1097 /**
f5bccd85 1098 * Frame rate emulation. If not zero, the lower layer (i.e. format handler)
bdfcbbed 1099 * has to read frames at native frame rate.
f5bccd85
DB
1100 * - encoding: Set by user.
1101 * - decoding: unused
bdfcbbed
MK
1102 */
1103 int rate_emu;
115329f1 1104
b71901e6 1105 /**
f5bccd85
DB
1106 * If non NULL, 'draw_horiz_band' is called by the libavcodec
1107 * decoder to draw a horizontal band. It improves cache usage. Not
b71901e6 1108 * all codecs can do that. You must check the codec capabilities
f5bccd85 1109 * beforehand.
24b1583a
IK
1110 * The function is also used by hardware acceleration APIs.
1111 * It is called at least once during frame decoding to pass
1112 * the data needed for hardware render.
1113 * In that mode instead of pixel data, AVFrame points to
1114 * a structure specific to the acceleration API. The application
1115 * reads the structure and can change some fields to indicate progress
1116 * or mark state.
64863965 1117 * - encoding: unused
f5bccd85 1118 * - decoding: Set by user.
3bb07d61
MN
1119 * @param height the height of the slice
1120 * @param y the y position of the slice
1121 * @param type 1->top field, 2->bottom field, 3->frame
1122 * @param offset offset into the AVFrame.data from which the slice should be read
b71901e6 1123 */
bf89e6b1 1124 void (*draw_horiz_band)(struct AVCodecContext *s,
da64ecc3 1125 const AVFrame *src, int offset[4],
3bb07d61 1126 int y, int type, int height);
bf89e6b1 1127
de6d9b64 1128 /* audio only */
f5bccd85 1129 int sample_rate; ///< samples per second
5fcc4a23 1130 int channels; ///< number of audio channels
a3a5f4d6
MN
1131
1132 /**
f5bccd85
DB
1133 * audio sample format
1134 * - encoding: Set by user.
1135 * - decoding: Set by libavcodec.
a3a5f4d6 1136 */
ce9dd8f5 1137 enum SampleFormat sample_fmt; ///< sample format
de6d9b64 1138
f5bccd85 1139 /* The following data should not be initialized. */
718b27a7 1140 /**
f5bccd85 1141 * Samples per packet, initialized when calling 'init'.
718b27a7
MN
1142 */
1143 int frame_size;
115329f1 1144 int frame_number; ///< audio or video frame number
c0601d70 1145#if LIBAVCODEC_VERSION_MAJOR < 53
f5bccd85 1146 int real_pict_num; ///< Returns the real picture number of previous encoded frame.
c0601d70 1147#endif
115329f1 1148
b71901e6 1149 /**
f5bccd85 1150 * Number of frames the decoded output will be delayed relative to
64863965 1151 * the encoded input.
f5bccd85 1152 * - encoding: Set by libavcodec.
64863965 1153 * - decoding: unused
b71901e6
MN
1154 */
1155 int delay;
115329f1 1156
64863965
MN
1157 /* - encoding parameters */
1158 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
115329f1
DB
1159 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
1160
b71901e6 1161 /**
f5bccd85
DB
1162 * minimum quantizer
1163 * - encoding: Set by user.
64863965 1164 * - decoding: unused
b71901e6
MN
1165 */
1166 int qmin;
1167
1168 /**
f5bccd85
DB
1169 * maximum quantizer
1170 * - encoding: Set by user.
64863965 1171 * - decoding: unused
b71901e6
MN
1172 */
1173 int qmax;
1174
1175 /**
f5bccd85
DB
1176 * maximum quantizer difference between frames
1177 * - encoding: Set by user.
64863965 1178 * - decoding: unused
b71901e6
MN
1179 */
1180 int max_qdiff;
1181
1182 /**
f5bccd85
DB
1183 * maximum number of B-frames between non-B-frames
1184 * Note: The output will be delayed by max_b_frames+1 relative to the input.
1185 * - encoding: Set by user.
64863965 1186 * - decoding: unused
b71901e6
MN
1187 */
1188 int max_b_frames;
1189
1190 /**
f5bccd85 1191 * qscale factor between IP and B-frames
662e5411 1192 * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
1193 * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
f5bccd85 1194 * - encoding: Set by user.
64863965 1195 * - decoding: unused
b71901e6
MN
1196 */
1197 float b_quant_factor;
115329f1 1198
b71901e6
MN
1199 /** obsolete FIXME remove */
1200 int rc_strategy;
64b7c5b6
MN
1201#define FF_RC_STRATEGY_XVID 1
1202
8b4c7dbc 1203 int b_frame_strategy;
9dbcbd92 1204
b71901e6 1205 /**
85947156
VS
1206 * hurry up amount
1207 * - encoding: unused
1208 * - decoding: Set by user. 1-> Skip B-frames, 2-> Skip IDCT/dequant too, 5-> Skip everything except header
f9ec0aa1 1209 * @deprecated Deprecated in favor of skip_idct and skip_frame.
b71901e6
MN
1210 */
1211 int hurry_up;
115329f1 1212
de6d9b64 1213 struct AVCodec *codec;
115329f1 1214
de6d9b64
FB
1215 void *priv_data;
1216
bb628dae 1217 int rtp_payload_size; /* The size of the RTP payload: the coder will */
f5bccd85 1218 /* do its best to deliver a chunk with size */
644d98a4 1219 /* below rtp_payload_size, the chunk will start */
f5bccd85 1220 /* with a start code on some codecs like H.263. */
644d98a4 1221 /* This doesn't take account of any particular */
f5bccd85 1222 /* headers inside the transmitted RTP payload. */
81401c1f 1223
115329f1 1224
f5bccd85
DB
1225 /* The RTP callback: This function is called */
1226 /* every time the encoder has a packet to send. */
1227 /* It depends on the encoder if the data starts */
1228 /* with a Start Code (it should). H.263 does. */
1229 /* mb_nb contains the number of macroblocks */
1230 /* encoded in the RTP payload. */
115329f1 1231 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
81401c1f 1232
098eefe1
MN
1233 /* statistics, used for 2-pass encoding */
1234 int mv_bits;
1235 int header_bits;
1236 int i_tex_bits;
1237 int p_tex_bits;
1238 int i_count;
1239 int p_count;
1240 int skip_count;
b71901e6 1241 int misc_bits;
115329f1 1242
b71901e6 1243 /**
f5bccd85
DB
1244 * number of bits used for the previously encoded frame
1245 * - encoding: Set by libavcodec.
7004ffb3 1246 * - decoding: unused
b71901e6 1247 */
098eefe1 1248 int frame_bits;
7004ffb3 1249
b71901e6 1250 /**
f5bccd85
DB
1251 * Private data of the user, can be used to carry app specific stuff.
1252 * - encoding: Set by user.
1253 * - decoding: Set by user.
b71901e6
MN
1254 */
1255 void *opaque;
1256
de6d9b64 1257 char codec_name[32];
4a663d80
PG
1258 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
1259 enum CodecID codec_id; /* see CODEC_ID_xxx */
115329f1 1260
7004ffb3
MN
1261 /**
1262 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
f5bccd85
DB
1263 * This is used to work around some encoder bugs.
1264 * A demuxer should set this to what is stored in the field used to identify the codec.
1265 * If there are multiple such fields in a container then the demuxer should choose the one
1266 * which maximizes the information about the used codec.
1267 * If the codec tag field in a container is larger then 32 bits then the demuxer should
1268 * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
47bbf8a7 1269 * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
f5bccd85
DB
1270 * first.
1271 * - encoding: Set by user, if not then the default based on codec_id will be used.
1272 * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
7004ffb3
MN
1273 */
1274 unsigned int codec_tag;
115329f1 1275
b71901e6 1276 /**
f5bccd85
DB
1277 * Work around bugs in encoders which sometimes cannot be detected automatically.
1278 * - encoding: Set by user
1279 * - decoding: Set by user
b71901e6
MN
1280 */
1281 int workaround_bugs;
64863965 1282#define FF_BUG_AUTODETECT 1 ///< autodetection
4d2858de
MN
1283#define FF_BUG_OLD_MSMPEG4 2
1284#define FF_BUG_XVID_ILACE 4
1285#define FF_BUG_UMP4 8
1286#define FF_BUG_NO_PADDING 16
3116cb14 1287#define FF_BUG_AMV 32
f5bccd85 1288#define FF_BUG_AC_VLC 0 ///< Will be removed, libavcodec can now handle these non-compliant files by default.
03e93d35 1289#define FF_BUG_QPEL_CHROMA 64
db794953 1290#define FF_BUG_STD_QPEL 128
36df8805 1291#define FF_BUG_QPEL_CHROMA2 256
c40c3482 1292#define FF_BUG_DIRECT_BLOCKSIZE 512
1c6dcb0f 1293#define FF_BUG_EDGE 1024
b44bdf7e 1294#define FF_BUG_HPEL_CHROMA 2048
4ccde216 1295#define FF_BUG_DC_CLIP 4096
f5bccd85
DB
1296#define FF_BUG_MS 8192 ///< Work around various bugs in Microsoft's broken decoders.
1297//#define FF_BUG_FAKE_SCALABILITY 16 //Autodetection should work 100%.
115329f1 1298
b71901e6 1299 /**
f5bccd85
DB
1300 * luma single coefficient elimination threshold
1301 * - encoding: Set by user.
64863965 1302 * - decoding: unused
b71901e6 1303 */
1f6b6e50 1304 int luma_elim_threshold;
115329f1 1305
b71901e6 1306 /**
f5bccd85
DB
1307 * chroma single coeff elimination threshold
1308 * - encoding: Set by user.
64863965 1309 * - decoding: unused
b71901e6 1310 */
1f6b6e50 1311 int chroma_elim_threshold;
115329f1 1312
b71901e6 1313 /**
f5bccd85
DB
1314 * strictly follow the standard (MPEG4, ...).
1315 * - encoding: Set by user.
5771b2c3
MN
1316 * - decoding: Set by user.
1317 * Setting this to STRICT or higher means the encoder and decoder will
1318 * generally do stupid things. While setting it to inofficial or lower
1319 * will mean the encoder might use things that are not supported by all
1320 * spec compliant decoders. Decoders make no difference between normal,
1321 * inofficial and experimental, that is they always try to decode things
1322 * when they can unless they are explicitly asked to behave stupid
1323 * (=strictly conform to the specs)
b71901e6
MN
1324 */
1325 int strict_std_compliance;
f5bccd85
DB
1326#define FF_COMPLIANCE_VERY_STRICT 2 ///< Strictly conform to a older more strict version of the spec or reference software.
1327#define FF_COMPLIANCE_STRICT 1 ///< Strictly conform to all the things in the spec no matter what consequences.
9cd81798 1328#define FF_COMPLIANCE_NORMAL 0
f5bccd85
DB
1329#define FF_COMPLIANCE_INOFFICIAL -1 ///< Allow inofficial extensions.
1330#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
9cd81798 1331
b71901e6 1332 /**
f5bccd85 1333 * qscale offset between IP and B-frames
f5bccd85 1334 * - encoding: Set by user.
64863965 1335 * - decoding: unused
b71901e6
MN
1336 */
1337 float b_quant_offset;
115329f1 1338
b71901e6 1339 /**
047599a4 1340 * Error recognization; higher values will detect more errors but may
f5bccd85 1341 * misdetect some more or less valid parts as errors.
64863965 1342 * - encoding: unused
f5bccd85 1343 * - decoding: Set by user.
b71901e6 1344 */
047599a4 1345 int error_recognition;
1471c6c2 1346#define FF_ER_CAREFUL 1
ce3bcaed
MN
1347#define FF_ER_COMPLIANT 2
1348#define FF_ER_AGGRESSIVE 3
1349#define FF_ER_VERY_AGGRESSIVE 4
115329f1 1350
6b72ac63 1351 /**
f5bccd85
DB
1352 * Called at the beginning of each frame to get a buffer for it.
1353 * If pic.reference is set then the frame will be read later by libavcodec.
2b5296d2 1354 * avcodec_align_dimensions() should be used to find the required width and
f5bccd85 1355 * height, as they normally need to be rounded up to the next multiple of 16.
f1b99cc6
MN
1356 * if CODEC_CAP_DR1 is not set then get_buffer() must call
1357 * avcodec_default_get_buffer() instead of providing buffers allocated by
1358 * some other means.
64863965 1359 * - encoding: unused
f5bccd85 1360 * - decoding: Set by libavcodec., user can override.
b71901e6 1361 */
492cd3a9 1362 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
115329f1 1363
b71901e6 1364 /**
69b192ac 1365 * Called to release buffers which were allocated with get_buffer.
f5bccd85
DB
1366 * A released buffer can be reused in get_buffer().
1367 * pic.data[*] must be set to NULL.
64863965 1368 * - encoding: unused
f5bccd85 1369 * - decoding: Set by libavcodec., user can override.
b71901e6 1370 */
492cd3a9 1371 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
0fd90455 1372
b71901e6 1373 /**
eb8a25c8 1374 * Size of the frame reordering buffer in the decoder.
2d7b0560 1375 * For MPEG-2 it is 1 IPB or 0 low delay IP.
f5bccd85
DB
1376 * - encoding: Set by libavcodec.
1377 * - decoding: Set by libavcodec.
b71901e6
MN
1378 */
1379 int has_b_frames;
718b27a7
MN
1380
1381 /**
1382 * number of bytes per packet if constant and known or 0
f5bccd85 1383 * Used by some WAV based audio codecs.
718b27a7
MN
1384 */
1385 int block_align;
115329f1 1386
f5bccd85 1387 int parse_only; /* - decoding only: If true, only parsing is done
917e06c8
FB
1388 (function avcodec_parse_frame()). The frame
1389 data is returned. Only MPEG codecs support this now. */
115329f1 1390
b71901e6 1391 /**
f5bccd85
DB
1392 * 0-> h263 quant 1-> mpeg quant
1393 * - encoding: Set by user.
64863965 1394 * - decoding: unused
b71901e6
MN
1395 */
1396 int mpeg_quant;
115329f1 1397
b71901e6 1398 /**
f5bccd85
DB
1399 * pass1 encoding statistics output buffer
1400 * - encoding: Set by libavcodec.
64863965 1401 * - decoding: unused
b71901e6 1402 */
64863965 1403 char *stats_out;
115329f1 1404
b71901e6 1405 /**
f5bccd85
DB
1406 * pass2 encoding statistics input buffer
1407 * Concatenated stuff from stats_out of pass1 should be placed here.
1408 * - encoding: Allocated/set/freed by user.
64863965 1409 * - decoding: unused
b71901e6
MN
1410 */
1411 char *stats_in;
115329f1 1412
b71901e6 1413 /**
f5bccd85
DB
1414 * ratecontrol qmin qmax limiting method
1415 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
1416 * - encoding: Set by user.
64863965 1417 * - decoding: unused
b71901e6 1418 */
ce980a95 1419 float rc_qsquish;
b71901e6 1420
ce980a95
MN
1421 float rc_qmod_amp;
1422 int rc_qmod_freq;
115329f1 1423
b71901e6 1424 /**
f5bccd85
DB
1425 * ratecontrol override, see RcOverride
1426 * - encoding: Allocated/set/freed by user.
64863965 1427 * - decoding: unused
b71901e6 1428 */
ce980a95
MN
1429 RcOverride *rc_override;
1430 int rc_override_count;
115329f1 1431
b71901e6 1432 /**
f5bccd85
DB
1433 * rate control equation
1434 * - encoding: Set by user
64863965 1435 * - decoding: unused
b71901e6 1436 */
6881b8e5 1437 const char *rc_eq;
115329f1 1438
b71901e6 1439 /**
f5bccd85
DB
1440 * maximum bitrate
1441 * - encoding: Set by user.
64863965 1442 * - decoding: unused
b71901e6 1443 */
ce980a95 1444 int rc_max_rate;
115329f1 1445
b71901e6 1446 /**
f5bccd85
DB
1447 * minimum bitrate
1448 * - encoding: Set by user.
64863965 1449 * - decoding: unused
b71901e6 1450 */
ce980a95 1451 int rc_min_rate;
115329f1 1452
b71901e6 1453 /**
f5bccd85
DB
1454 * decoder bitstream buffer size
1455 * - encoding: Set by user.
64863965 1456 * - decoding: unused
b71901e6 1457 */
ce980a95
MN
1458 int rc_buffer_size;
1459 float rc_buffer_aggressivity;
b71901e6
MN
1460
1461 /**
f5bccd85
DB
1462 * qscale factor between P and I-frames
1463 * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
1464 * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1465 * - encoding: Set by user.
64863965 1466 * - decoding: unused
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MN
1467 */
1468 float i_quant_factor;
115329f1 1469
b71901e6 1470 /**
f5bccd85
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1471 * qscale offset between P and I-frames
1472 * - encoding: Set by user.
64863965 1473 * - decoding: unused
b71901e6
MN
1474 */
1475 float i_quant_offset;
115329f1 1476
b71901e6 1477 /**
f5bccd85
DB
1478 * initial complexity for pass1 ratecontrol
1479 * - encoding: Set by user.
64863965 1480 * - decoding: unused
b71901e6 1481 */
ce980a95 1482 float rc_initial_cplx;
917e06c8 1483
b71901e6 1484 /**
f5bccd85
DB
1485 * DCT algorithm, see FF_DCT_* below
1486 * - encoding: Set by user.
64863965 1487 * - decoding: unused
b71901e6 1488 */
28db7fce 1489 int dct_algo;
c7e07931 1490#define FF_DCT_AUTO 0
28db7fce 1491#define FF_DCT_FASTINT 1
c7e07931
MO
1492#define FF_DCT_INT 2
1493#define FF_DCT_MMX 3
1494#define FF_DCT_MLIB 4
05c4072b 1495#define FF_DCT_ALTIVEC 5
65e4c8c9 1496#define FF_DCT_FAAN 6
115329f1 1497
c5d309f2 1498 /**
f5bccd85
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1499 * luminance masking (0-> disabled)
1500 * - encoding: Set by user.
64863965 1501 * - decoding: unused
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MN
1502 */
1503 float lumi_masking;
115329f1 1504
c5d309f2 1505 /**
f5bccd85
DB
1506 * temporary complexity masking (0-> disabled)
1507 * - encoding: Set by user.
64863965 1508 * - decoding: unused
c5d309f2
MN
1509 */
1510 float temporal_cplx_masking;
115329f1 1511
c5d309f2 1512 /**
f5bccd85
DB
1513 * spatial complexity masking (0-> disabled)
1514 * - encoding: Set by user.
64863965 1515 * - decoding: unused
c5d309f2
MN
1516 */
1517 float spatial_cplx_masking;
115329f1 1518
c5d309f2 1519 /**
f5bccd85
DB
1520 * p block masking (0-> disabled)
1521 * - encoding: Set by user.
64863965 1522 * - decoding: unused
c5d309f2
MN
1523 */
1524 float p_masking;
15415af4 1525
5e746b99 1526 /**
f5bccd85
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1527 * darkness masking (0-> disabled)
1528 * - encoding: Set by user.
64863965 1529 * - decoding: unused
5e746b99
MN
1530 */
1531 float dark_masking;
115329f1 1532
0c2dd16e 1533 /**
f5bccd85
DB
1534 * IDCT algorithm, see FF_IDCT_* below.
1535 * - encoding: Set by user.
1536 * - decoding: Set by user.
2ad1516a
MN
1537 */
1538 int idct_algo;
273b0cd3
DB
1539#define FF_IDCT_AUTO 0
1540#define FF_IDCT_INT 1
1541#define FF_IDCT_SIMPLE 2
1542#define FF_IDCT_SIMPLEMMX 3
1543#define FF_IDCT_LIBMPEG2MMX 4
1544#define FF_IDCT_PS2 5
1545#define FF_IDCT_MLIB 6
1546#define FF_IDCT_ARM 7
1547#define FF_IDCT_ALTIVEC 8
1548#define FF_IDCT_SH4 9
1549#define FF_IDCT_SIMPLEARM 10
1550#define FF_IDCT_H264 11
1551#define FF_IDCT_VP3 12
1552#define FF_IDCT_IPP 13
1553#define FF_IDCT_XVIDMMX 14
1554#define FF_IDCT_CAVS 15
a0403006 1555#define FF_IDCT_SIMPLEARMV5TE 16
273b0cd3 1556#define FF_IDCT_SIMPLEARMV6 17
d9420d4d 1557#define FF_IDCT_SIMPLEVIS 18
9abc7e0f 1558#define FF_IDCT_WMV2 19
6f08c541 1559#define FF_IDCT_FAAN 20
42b30357 1560#define FF_IDCT_EA 21
7eec4328 1561#define FF_IDCT_SIMPLENEON 22
74c47463 1562#define FF_IDCT_SIMPLEALPHA 23
2ad1516a 1563
144f0625 1564 /**
f5bccd85
DB
1565 * slice count
1566 * - encoding: Set by libavcodec.
1567 * - decoding: Set by user (or 0).
144f0625
MN
1568 */
1569 int slice_count;
1570 /**
f5bccd85
DB
1571 * slice offsets in the frame in bytes
1572 * - encoding: Set/allocated by libavcodec.
1573 * - decoding: Set/allocated by user (or NULL).
144f0625
MN
1574 */
1575 int *slice_offset;
1576
4d2858de 1577 /**
f5bccd85 1578 * error concealment flags
64863965 1579 * - encoding: unused
f5bccd85 1580 * - decoding: Set by user.
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MN
1581 */
1582 int error_concealment;
1583#define FF_EC_GUESS_MVS 1
1584#define FF_EC_DEBLOCK 2
1585
6b72ac63 1586 /**
bec89a84 1587 * dsp_mask could be add used to disable unwanted CPU features
8350df97 1588 * CPU features (i.e. MMX, SSE. ...)
bec89a84 1589 *
f5bccd85
DB
1590 * With the FORCE flag you may instead enable given CPU features.
1591 * (Dangerous: Usable in case of misdetection, improper usage however will
1592 * result into program crash.)
bec89a84
ZK
1593 */
1594 unsigned dsp_mask;
f5bccd85 1595#define FF_MM_FORCE 0x80000000 /* Force usage of selected flags (OR) */
bec89a84 1596 /* lower 16 bits - CPU features */
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MN
1597#define FF_MM_MMX 0x0001 ///< standard MMX
1598#define FF_MM_3DNOW 0x0004 ///< AMD 3DNOW
6b434361 1599#if LIBAVCODEC_VERSION_MAJOR < 53
0cd60abf 1600#define FF_MM_MMXEXT 0x0002 ///< SSE integer functions or AMD MMX ext
6b434361
SS
1601#endif
1602#define FF_MM_MMX2 0x0002 ///< SSE integer functions or AMD MMX ext
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MN
1603#define FF_MM_SSE 0x0008 ///< SSE functions
1604#define FF_MM_SSE2 0x0010 ///< PIV SSE2 functions
1605#define FF_MM_3DNOWEXT 0x0020 ///< AMD 3DNowExt
1606#define FF_MM_SSE3 0x0040 ///< Prescott SSE3 functions
1607#define FF_MM_SSSE3 0x0080 ///< Conroe SSSE3 functions
710441c2
DC
1608#define FF_MM_SSE4 0x0100 ///< Penryn SSE4.1 functions
1609#define FF_MM_SSE42 0x0200 ///< Nehalem SSE4.2 functions
0cd60abf 1610#define FF_MM_IWMMXT 0x0100 ///< XScale IWMMXT
82d1605f 1611#define FF_MM_ALTIVEC 0x0001 ///< standard AltiVec
11f18faf
MN
1612
1613 /**
64863965 1614 * bits per sample/pixel from the demuxer (needed for huffyuv).
f5bccd85
DB
1615 * - encoding: Set by libavcodec.
1616 * - decoding: Set by user.
11f18faf 1617 */
46a73068 1618 int bits_per_coded_sample;
115329f1 1619
11f18faf 1620 /**
f5bccd85
DB
1621 * prediction method (needed for huffyuv)
1622 * - encoding: Set by user.
64863965 1623 * - decoding: unused
11f18faf
MN
1624 */
1625 int prediction_method;
1626#define FF_PRED_LEFT 0
1627#define FF_PRED_PLANE 1
1628#define FF_PRED_MEDIAN 2
115329f1 1629
5d3cea3a 1630 /**
f5bccd85 1631 * sample aspect ratio (0 if unknown)
8e5af7a6 1632 * That is the width of a pixel divided by the height of the pixel.
f5bccd85
DB
1633 * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
1634 * - encoding: Set by user.
1635 * - decoding: Set by libavcodec.
5d3cea3a 1636 */
5ff85f1d 1637 AVRational sample_aspect_ratio;
1e491e29
MN
1638
1639 /**
f5bccd85
DB
1640 * the picture in the bitstream
1641 * - encoding: Set by libavcodec.
1642 * - decoding: Set by libavcodec.
1e491e29 1643 */
492cd3a9 1644 AVFrame *coded_frame;
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MN
1645
1646 /**
f5bccd85
DB
1647 * debug
1648 * - encoding: Set by user.
1649 * - decoding: Set by user.
c8c437bc
MN
1650 */
1651 int debug;
273b0cd3
DB
1652#define FF_DEBUG_PICT_INFO 1
1653#define FF_DEBUG_RC 2
1654#define FF_DEBUG_BITSTREAM 4
1655#define FF_DEBUG_MB_TYPE 8
1656#define FF_DEBUG_QP 16
1657#define FF_DEBUG_MV 32
1658#define FF_DEBUG_DCT_COEFF 0x00000040
1659#define FF_DEBUG_SKIP 0x00000080
1660#define FF_DEBUG_STARTCODE 0x00000100
1661#define FF_DEBUG_PTS 0x00000200
1662#define FF_DEBUG_ER 0x00000400
1663#define FF_DEBUG_MMCO 0x00000800
1664#define FF_DEBUG_BUGS 0x00001000
1665#define FF_DEBUG_VIS_QP 0x00002000
864119b6 1666#define FF_DEBUG_VIS_MB_TYPE 0x00004000
385c820b 1667#define FF_DEBUG_BUFFERS 0x00008000
115329f1 1668
140cb663 1669 /**
f5bccd85
DB
1670 * debug
1671 * - encoding: Set by user.
1672 * - decoding: Set by user.
0c9bbaec
WH
1673 */
1674 int debug_mv;
1675#define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1676#define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1677#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1678
1679 /**
f5bccd85
DB
1680 * error
1681 * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
64863965 1682 * - decoding: unused
140cb663
MN
1683 */
1684 uint64_t error[4];
115329f1 1685
17a70fde 1686 /**
f5bccd85 1687 * minimum MB quantizer
6e0d8c06 1688 * - encoding: unused
64863965 1689 * - decoding: unused
17a70fde
MN
1690 */
1691 int mb_qmin;
1692
1693 /**
f5bccd85 1694 * maximum MB quantizer
6e0d8c06 1695 * - encoding: unused
64863965 1696 * - decoding: unused
17a70fde
MN
1697 */
1698 int mb_qmax;
115329f1 1699
1457ab52 1700 /**
f5bccd85
DB
1701 * motion estimation comparison function
1702 * - encoding: Set by user.
64863965 1703 * - decoding: unused
1457ab52
MN
1704 */
1705 int me_cmp;
1706 /**
f5bccd85
DB
1707 * subpixel motion estimation comparison function
1708 * - encoding: Set by user.
64863965 1709 * - decoding: unused
1457ab52
MN
1710 */
1711 int me_sub_cmp;
1712 /**
f5bccd85
DB
1713 * macroblock comparison function (not supported yet)
1714 * - encoding: Set by user.
64863965 1715 * - decoding: unused
1457ab52
MN
1716 */
1717 int mb_cmp;
622348f9 1718 /**
f5bccd85
DB
1719 * interlaced DCT comparison function
1720 * - encoding: Set by user.
622348f9
MN
1721 * - decoding: unused
1722 */
1723 int ildct_cmp;
273b0cd3
DB
1724#define FF_CMP_SAD 0
1725#define FF_CMP_SSE 1
1726#define FF_CMP_SATD 2
1727#define FF_CMP_DCT 3
1728#define FF_CMP_PSNR 4
1729#define FF_CMP_BIT 5
1730#define FF_CMP_RD 6
1731#define FF_CMP_ZERO 7
1732#define FF_CMP_VSAD 8
1733#define FF_CMP_VSSE 9
1734#define FF_CMP_NSSE 10
1735#define FF_CMP_W53 11
1736#define FF_CMP_W97 12
0fd6aea1 1737#define FF_CMP_DCTMAX 13
27c61ac5 1738#define FF_CMP_DCT264 14
1457ab52 1739#define FF_CMP_CHROMA 256
115329f1 1740
1457ab52 1741 /**
f5bccd85
DB
1742 * ME diamond size & shape
1743 * - encoding: Set by user.
64863965 1744 * - decoding: unused
1457ab52
MN
1745 */
1746 int dia_size;
b07a5980
MN
1747
1748 /**
f5bccd85
DB
1749 * amount of previous MV predictors (2a+1 x 2a+1 square)
1750 * - encoding: Set by user.
64863965 1751 * - decoding: unused
b07a5980
MN
1752 */
1753 int last_predictor_count;
70ac76c0 1754
f5fb6b34 1755 /**
f5bccd85
DB
1756 * prepass for motion estimation
1757 * - encoding: Set by user.
64863965 1758 * - decoding: unused
f5fb6b34
MN
1759 */
1760 int pre_me;
b07a5980 1761
70ac76c0 1762 /**
f5bccd85
DB
1763 * motion estimation prepass comparison function
1764 * - encoding: Set by user.
64863965 1765 * - decoding: unused
70ac76c0
MN
1766 */
1767 int me_pre_cmp;
826f429a 1768
70ac76c0 1769 /**
f5bccd85
DB
1770 * ME prepass diamond size & shape
1771 * - encoding: Set by user.
64863965 1772 * - decoding: unused
70ac76c0
MN
1773 */
1774 int pre_dia_size;
1775
826f429a 1776 /**
f5bccd85
DB
1777 * subpel ME quality
1778 * - encoding: Set by user.
64863965 1779 * - decoding: unused
826f429a
MN
1780 */
1781 int me_subpel_quality;
1782
a33c7159 1783 /**
f5bccd85 1784 * callback to negotiate the pixelFormat
a33c7159 1785 * @param fmt is the list of formats which are supported by the codec,
f5bccd85
DB
1786 * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
1787 * The first is always the native one.
1788 * @return the chosen format
64863965 1789 * - encoding: unused
f5bccd85 1790 * - decoding: Set by user, if not set the native format will be chosen.
a33c7159 1791 */
494c56d3 1792 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
e2f9490e
FB
1793
1794 /**
f5bccd85
DB
1795 * DTG active format information (additional aspect ratio
1796 * information only used in DVB MPEG-2 transport streams)
1797 * 0 if not set.
115329f1 1798 *
f5bccd85
DB
1799 * - encoding: unused
1800 * - decoding: Set by decoder.
e2f9490e
FB
1801 */
1802 int dtg_active_format;
1803#define FF_DTG_AFD_SAME 8
1804#define FF_DTG_AFD_4_3 9
1805#define FF_DTG_AFD_16_9 10
1806#define FF_DTG_AFD_14_9 11
1807#define FF_DTG_AFD_4_3_SP_14_9 13
1808#define FF_DTG_AFD_16_9_SP_14_9 14
1809#define FF_DTG_AFD_SP_4_3 15
1810
ebbcdc9a 1811 /**
f5bccd85
DB
1812 * maximum motion estimation search range in subpel units
1813 * If 0 then no limit.
115329f1 1814 *
f5bccd85
DB
1815 * - encoding: Set by user.
1816 * - decoding: unused
ebbcdc9a 1817 */
59e0ac8e 1818 int me_range;
ebbcdc9a 1819
65f7062d 1820 /**
f5bccd85
DB
1821 * intra quantizer bias
1822 * - encoding: Set by user.
1984f635
MN
1823 * - decoding: unused
1824 */
1825 int intra_quant_bias;
1826#define FF_DEFAULT_QUANT_BIAS 999999
115329f1 1827
1984f635 1828 /**
f5bccd85
DB
1829 * inter quantizer bias
1830 * - encoding: Set by user.
1984f635
MN
1831 * - decoding: unused
1832 */
1833 int inter_quant_bias;
5cd62665
ZK
1834
1835 /**
f5bccd85
DB
1836 * color table ID
1837 * - encoding: unused
1838 * - decoding: Which clrtable should be used for 8bit RGB images.
1839 * Tables have to be stored somewhere. FIXME
5cd62665
ZK
1840 */
1841 int color_table_id;
115329f1 1842
d90cf87b 1843 /**
f5bccd85
DB
1844 * internal_buffer count
1845 * Don't touch, used by libavcodec default_get_buffer().
d90cf87b
MN
1846 */
1847 int internal_buffer_count;
115329f1 1848
d90cf87b 1849 /**
f5bccd85
DB
1850 * internal_buffers
1851 * Don't touch, used by libavcodec default_get_buffer().
d90cf87b
MN
1852 */
1853 void *internal_buffer;
158c7f05
MN
1854
1855#define FF_LAMBDA_SHIFT 7
1856#define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1857#define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1858#define FF_LAMBDA_MAX (256*128-1)
1859
1860#define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
3d2e8cce 1861 /**
f5bccd85
DB
1862 * Global quality for codecs which cannot change it per frame.
1863 * This should be proportional to MPEG-1/2/4 qscale.
1864 * - encoding: Set by user.
3d2e8cce
MN
1865 * - decoding: unused
1866 */
1867 int global_quality;
115329f1 1868
bd446bb1
MN
1869#define FF_CODER_TYPE_VLC 0
1870#define FF_CODER_TYPE_AC 1
f87459e4
KN
1871#define FF_CODER_TYPE_RAW 2
1872#define FF_CODER_TYPE_RLE 3
1873#define FF_CODER_TYPE_DEFLATE 4
11e659c2
MN
1874 /**
1875 * coder type
f5bccd85 1876 * - encoding: Set by user.
11e659c2
MN
1877 * - decoding: unused
1878 */
1879 int coder_type;
1880
1881 /**
1882 * context model
f5bccd85 1883 * - encoding: Set by user.
11e659c2
MN
1884 * - decoding: unused
1885 */
1886 int context_model;
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MN
1887#if 0
1888 /**
1889 *
1890 * - encoding: unused
f5bccd85 1891 * - decoding: Set by user.
5639729b
MN
1892 */
1893 uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1894#endif
115329f1 1895
3bb07d61
MN
1896 /**
1897 * slice flags
1898 * - encoding: unused
f5bccd85 1899 * - decoding: Set by user.
3bb07d61
MN
1900 */
1901 int slice_flags;
1902#define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1903#define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1904#define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1905
fb364ada
IK
1906 /**
1907 * XVideo Motion Acceleration
1908 * - encoding: forbidden
1909 * - decoding: set by decoder
1910 */
1911 int xvmc_acceleration;
115329f1 1912
7d1c3fc1
MN
1913 /**
1914 * macroblock decision mode
f5bccd85 1915 * - encoding: Set by user.
7d1c3fc1
MN
1916 * - decoding: unused
1917 */
1918 int mb_decision;
1919#define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1920#define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
e6dba5df 1921#define FF_MB_DECISION_RD 2 ///< rate distortion
d6eb3c50
MN
1922
1923 /**
1924 * custom intra quantization matrix
f5bccd85
DB
1925 * - encoding: Set by user, can be NULL.
1926 * - decoding: Set by libavcodec.
d6eb3c50
MN
1927 */
1928 uint16_t *intra_matrix;
1929
1930 /**
1931 * custom inter quantization matrix
f5bccd85
DB
1932 * - encoding: Set by user, can be NULL.
1933 * - decoding: Set by libavcodec.
d6eb3c50
MN
1934 */
1935 uint16_t *inter_matrix;
115329f1 1936
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MN
1937 /**
1938 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
f5bccd85 1939 * This is used to work around some encoder bugs.
541ae140 1940 * - encoding: unused
f5bccd85 1941 * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
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MN
1942 */
1943 unsigned int stream_codec_tag;
05fbd0a2
MN
1944
1945 /**
f5bccd85
DB
1946 * scene change detection threshold
1947 * 0 is default, larger means fewer detected scene changes.
1948 * - encoding: Set by user.
05fbd0a2
MN
1949 * - decoding: unused
1950 */
1951 int scenechange_threshold;
158c7f05
MN
1952
1953 /**
f5bccd85
DB
1954 * minimum Lagrange multipler
1955 * - encoding: Set by user.
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MN
1956 * - decoding: unused
1957 */
1958 int lmin;
1959
1960 /**
f5bccd85
DB
1961 * maximum Lagrange multipler
1962 * - encoding: Set by user.
158c7f05
MN
1963 * - decoding: unused
1964 */
1965 int lmax;
2a2bbcb0
MM
1966
1967 /**
f5bccd85 1968 * palette control structure
2a2bbcb0 1969 * - encoding: ??? (no palette-enabled encoder yet)
f5bccd85 1970 * - decoding: Set by user.
2a2bbcb0
MM
1971 */
1972 struct AVPaletteControl *palctrl;
821cb11f
MN
1973
1974 /**
1975 * noise reduction strength
f5bccd85 1976 * - encoding: Set by user.
821cb11f
MN
1977 * - decoding: unused
1978 */
1979 int noise_reduction;
115329f1 1980
074c4ca7 1981 /**
f5bccd85
DB
1982 * Called at the beginning of a frame to get cr buffer for it.
1983 * Buffer type (size, hints) must be the same. libavcodec won't check it.
1984 * libavcodec will pass previous buffer in pic, function should return
e1c2a5a0 1985 * same buffer or new buffer with old frame "painted" into it.
f5bccd85 1986 * If pic.data[0] == NULL must behave like get_buffer().
f1b99cc6
MN
1987 * if CODEC_CAP_DR1 is not set then reget_buffer() must call
1988 * avcodec_default_reget_buffer() instead of providing buffers allocated by
1989 * some other means.
074c4ca7 1990 * - encoding: unused
f5bccd85 1991 * - decoding: Set by libavcodec., user can override
074c4ca7 1992 */
e1c2a5a0 1993 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
ba58dabc
MN
1994
1995 /**
f5bccd85
DB
1996 * Number of bits which should be loaded into the rc buffer before decoding starts.
1997 * - encoding: Set by user.
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MN
1998 * - decoding: unused
1999 */
2000 int rc_initial_buffer_occupancy;
2001
2002 /**
2003 *
f5bccd85 2004 * - encoding: Set by user.
ba58dabc
MN
2005 * - decoding: unused
2006 */
2007 int inter_threshold;
2008
2009 /**
f5bccd85
DB
2010 * CODEC_FLAG2_*
2011 * - encoding: Set by user.
2012 * - decoding: Set by user.
ba58dabc
MN
2013 */
2014 int flags2;
7ebfc0ea
MN
2015
2016 /**
f5bccd85
DB
2017 * Simulates errors in the bitstream to test error concealment.
2018 * - encoding: Set by user.
2019 * - decoding: unused
7ebfc0ea
MN
2020 */
2021 int error_rate;
115329f1 2022
a1e257b2
MN
2023 /**
2024 * MP3 antialias algorithm, see FF_AA_* below.
2025 * - encoding: unused
f5bccd85 2026 * - decoding: Set by user.
a1e257b2
MN
2027 */
2028 int antialias_algo;
2029#define FF_AA_AUTO 0
2030#define FF_AA_FASTINT 1 //not implemented yet
2031#define FF_AA_INT 2
2032#define FF_AA_FLOAT 3
77ea0d4b 2033 /**
f5bccd85
DB
2034 * quantizer noise shaping
2035 * - encoding: Set by user.
77ea0d4b
MN
2036 * - decoding: unused
2037 */
2038 int quantizer_noise_shaping;
9c3d33d6
MN
2039
2040 /**
f5bccd85 2041 * thread count
eafcac6a 2042 * is used to decide how many independent tasks should be passed to execute()
f5bccd85
DB
2043 * - encoding: Set by user.
2044 * - decoding: Set by user.
9c3d33d6
MN
2045 */
2046 int thread_count;
115329f1 2047
9c3d33d6 2048 /**
f5bccd85
DB
2049 * The codec may call this to execute several independent things.
2050 * It will return only after finishing all tasks.
2051 * The user may replace this with some multithreaded implementation,
2052 * the default implementation will execute the parts serially.
399cec2f 2053 * @param count the number of things to execute
f5bccd85
DB
2054 * - encoding: Set by libavcodec, user can override.
2055 * - decoding: Set by libavcodec, user can override.
9c3d33d6 2056 */
3a84713a 2057 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size);
115329f1 2058
9c3d33d6 2059 /**
f5bccd85
DB
2060 * thread opaque
2061 * Can be used by execute() to store some per AVCodecContext stuff.
9c3d33d6
MN
2062 * - encoding: set by execute()
2063 * - decoding: set by execute()
2064 */
2065 void *thread_opaque;
a4d36c11
MN
2066
2067 /**
f5bccd85
DB
2068 * Motion estimation threshold below which no motion estimation is
2069 * performed, but instead the user specified motion vectors are used.
115329f1 2070 *
f5bccd85 2071 * - encoding: Set by user.
f20f8a8b 2072 * - decoding: unused
a4d36c11 2073 */
2750b827 2074 int me_threshold;
f20f8a8b
MN
2075
2076 /**
f5bccd85
DB
2077 * Macroblock threshold below which the user specified macroblock types will be used.
2078 * - encoding: Set by user.
f20f8a8b
MN
2079 * - decoding: unused
2080 */
2081 int mb_threshold;
bf266e19
MN
2082
2083 /**
f5bccd85
DB
2084 * precision of the intra DC coefficient - 8
2085 * - encoding: Set by user.
bf266e19
MN
2086 * - decoding: unused
2087 */
2088 int intra_dc_precision;
d4c5d2ad
MN
2089
2090 /**
f5bccd85
DB
2091 * noise vs. sse weight for the nsse comparsion function
2092 * - encoding: Set by user.
d4c5d2ad
MN
2093 * - decoding: unused
2094 */
2095 int nsse_weight;
0dfd33c3
MN
2096
2097 /**
f5bccd85 2098 * Number of macroblock rows at the top which are skipped.
0dfd33c3 2099 * - encoding: unused
f5bccd85 2100 * - decoding: Set by user.
0dfd33c3
MN
2101 */
2102 int skip_top;
2103
2104 /**
f5bccd85 2105 * Number of macroblock rows at the bottom which are skipped.
0dfd33c3 2106 * - encoding: unused
f5bccd85 2107 * - decoding: Set by user.
0dfd33c3
MN
2108 */
2109 int skip_bottom;
baced9f5
MN
2110
2111 /**
2112 * profile
f5bccd85
DB
2113 * - encoding: Set by user.
2114 * - decoding: Set by libavcodec.
baced9f5
MN
2115 */
2116 int profile;
2117#define FF_PROFILE_UNKNOWN -99
4f2c36ac 2118#define FF_PROFILE_AAC_MAIN 0
273b0cd3
DB
2119#define FF_PROFILE_AAC_LOW 1
2120#define FF_PROFILE_AAC_SSR 2
2121#define FF_PROFILE_AAC_LTP 3
baced9f5
MN
2122
2123 /**
2124 * level
f5bccd85
DB
2125 * - encoding: Set by user.
2126 * - decoding: Set by libavcodec.
baced9f5
MN
2127 */
2128 int level;
2129#define FF_LEVEL_UNKNOWN -99
178fcca8
MN
2130
2131 /**
f5bccd85 2132 * low resolution decoding, 1-> 1/2 size, 2->1/4 size
178fcca8 2133 * - encoding: unused
f5bccd85 2134 * - decoding: Set by user.
178fcca8
MN
2135 */
2136 int lowres;
21adafec
MN
2137
2138 /**
f5bccd85
DB
2139 * Bitstream width / height, may be different from width/height if lowres
2140 * or other things are used.
21adafec 2141 * - encoding: unused
f5bccd85 2142 * - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
21adafec
MN
2143 */
2144 int coded_width, coded_height;
bbf18b21
MN
2145
2146 /**
2147 * frame skip threshold
f5bccd85 2148 * - encoding: Set by user.
bbf18b21
MN
2149 * - decoding: unused
2150 */
2151 int frame_skip_threshold;
2152
2153 /**
2154 * frame skip factor
f5bccd85 2155 * - encoding: Set by user.
bbf18b21
MN
2156 * - decoding: unused
2157 */
2158 int frame_skip_factor;
0fd6aea1
MN
2159
2160 /**
2161 * frame skip exponent
f5bccd85 2162 * - encoding: Set by user.
0fd6aea1
MN
2163 * - decoding: unused
2164 */
2165 int frame_skip_exp;
2166
2167 /**
f5bccd85
DB
2168 * frame skip comparison function
2169 * - encoding: Set by user.
0fd6aea1
MN
2170 * - decoding: unused
2171 */
2172 int frame_skip_cmp;
957c743a
CM
2173
2174 /**
f5bccd85 2175 * Border processing masking, raises the quantizer for mbs on the borders
957c743a 2176 * of the picture.
f5bccd85 2177 * - encoding: Set by user.
957c743a
CM
2178 * - decoding: unused
2179 */
2180 float border_masking;
6e0d8c06
MN
2181
2182 /**
f5bccd85
DB
2183 * minimum MB lagrange multipler
2184 * - encoding: Set by user.
6e0d8c06
MN
2185 * - decoding: unused
2186 */
2187 int mb_lmin;
2188
2189 /**
f5bccd85
DB
2190 * maximum MB lagrange multipler
2191 * - encoding: Set by user.
6e0d8c06
MN
2192 * - decoding: unused
2193 */
2194 int mb_lmax;
09c3e44e
MN
2195
2196 /**
115329f1 2197 *
f5bccd85 2198 * - encoding: Set by user.
09c3e44e
MN
2199 * - decoding: unused
2200 */
2201 int me_penalty_compensation;
8c3eba7c
MN
2202
2203 /**
115329f1 2204 *
8c3eba7c 2205 * - encoding: unused
f5bccd85 2206 * - decoding: Set by user.
8c3eba7c
MN
2207 */
2208 enum AVDiscard skip_loop_filter;
2209
2210 /**
115329f1 2211 *
8c3eba7c 2212 * - encoding: unused
f5bccd85 2213 * - decoding: Set by user.
8c3eba7c
MN
2214 */
2215 enum AVDiscard skip_idct;
2216
2217 /**
115329f1 2218 *
8c3eba7c 2219 * - encoding: unused
f5bccd85 2220 * - decoding: Set by user.
8c3eba7c
MN
2221 */
2222 enum AVDiscard skip_frame;
316a2ec8
MN
2223
2224 /**
2225 *
f5bccd85 2226 * - encoding: Set by user.
316a2ec8
MN
2227 * - decoding: unused
2228 */
2229 int bidir_refine;
e8501c93
MN
2230
2231 /**
2232 *
f5bccd85 2233 * - encoding: Set by user.
e8501c93
MN
2234 * - decoding: unused
2235 */
2236 int brd_scale;
58f7833e
RS
2237
2238 /**
2239 * constant rate factor - quality-based VBR - values ~correspond to qps
f5bccd85 2240 * - encoding: Set by user.
58f7833e
RS
2241 * - decoding: unused
2242 */
9f1c1c99 2243 float crf;
58f7833e
RS
2244
2245 /**
2246 * constant quantization parameter rate control method
f5bccd85 2247 * - encoding: Set by user.
58f7833e
RS
2248 * - decoding: unused
2249 */
2250 int cqp;
2251
2252 /**
f5bccd85
DB
2253 * minimum GOP size
2254 * - encoding: Set by user.
58f7833e
RS
2255 * - decoding: unused
2256 */
2257 int keyint_min;
2258
2259 /**
2260 * number of reference frames
f5bccd85 2261 * - encoding: Set by user.
53d55e9e 2262 * - decoding: Set by lavc.
58f7833e
RS
2263 */
2264 int refs;
2265
2266 /**
2267 * chroma qp offset from luma
f5bccd85 2268 * - encoding: Set by user.
58f7833e
RS
2269 * - decoding: unused
2270 */
2271 int chromaoffset;
2272
2273 /**
f5bccd85
DB
2274 * Influences how often B-frames are used.
2275 * - encoding: Set by user.
58f7833e
RS
2276 * - decoding: unused
2277 */
2278 int bframebias;
2279
2280 /**
2281 * trellis RD quantization
f5bccd85 2282 * - encoding: Set by user.
58f7833e
RS
2283 * - decoding: unused
2284 */
2285 int trellis;
2286
2287 /**
f5bccd85
DB
2288 * Reduce fluctuations in qp (before curve compression).
2289 * - encoding: Set by user.
58f7833e
RS
2290 * - decoding: unused
2291 */
2292 float complexityblur;
2293
2294 /**
2295 * in-loop deblocking filter alphac0 parameter
2296 * alpha is in the range -6...6
f5bccd85 2297 * - encoding: Set by user.
58f7833e
RS
2298 * - decoding: unused
2299 */
2300 int deblockalpha;
2301
2302 /**
2303 * in-loop deblocking filter beta parameter
2304 * beta is in the range -6...6
f5bccd85 2305 * - encoding: Set by user.
58f7833e
RS
2306 * - decoding: unused
2307 */
2308 int deblockbeta;
2309
2310 /**
2311 * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
f5bccd85 2312 * - encoding: Set by user.
58f7833e
RS
2313 * - decoding: unused
2314 */
2315 int partitions;
56cc85a0
DB
2316#define X264_PART_I4X4 0x001 /* Analyze i4x4 */
2317#define X264_PART_I8X8 0x002 /* Analyze i8x8 (requires 8x8 transform) */
2318#define X264_PART_P8X8 0x010 /* Analyze p16x8, p8x16 and p8x8 */
2319#define X264_PART_P4X4 0x020 /* Analyze p8x4, p4x8, p4x4 */
2320#define X264_PART_B8X8 0x100 /* Analyze b16x8, b8x16 and b8x8 */
58f7833e
RS
2321
2322 /**
30ab4ded 2323 * direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal), 3 (auto)
f5bccd85 2324 * - encoding: Set by user.
58f7833e
RS
2325 * - decoding: unused
2326 */
2327 int directpred;
4f59b684 2328
14f0c8e2 2329 /**
02c164c1 2330 * Audio cutoff bandwidth (0 means "automatic")
f5bccd85 2331 * - encoding: Set by user.
14f0c8e2
LA
2332 * - decoding: unused
2333 */
2334 int cutoff;
39a64e30
CH
2335
2336 /**
f5bccd85
DB
2337 * Multiplied by qscale for each frame and added to scene_change_score.
2338 * - encoding: Set by user.
39a64e30
CH
2339 * - decoding: unused
2340 */
2341 int scenechange_factor;
1dd509b1
MN
2342
2343 /**
2344 *
f5bccd85
DB
2345 * Note: Value depends upon the compare function used for fullpel ME.
2346 * - encoding: Set by user.
1dd509b1
MN
2347 * - decoding: unused
2348 */
2349 int mv0_threshold;
f9243d34
CH
2350
2351 /**
f5bccd85
DB
2352 * Adjusts sensitivity of b_frame_strategy 1.
2353 * - encoding: Set by user.
f9243d34
CH
2354 * - decoding: unused
2355 */
2356 int b_sensitivity;
a403fc03
JR
2357
2358 /**
f5bccd85 2359 * - encoding: Set by user.
a403fc03
JR
2360 * - decoding: unused
2361 */
2362 int compression_level;
2363#define FF_COMPRESSION_DEFAULT -1
2364
2365 /**
f5bccd85
DB
2366 * Sets whether to use LPC mode - used by FLAC encoder.
2367 * - encoding: Set by user.
2368 * - decoding: unused
a403fc03
JR
2369 */
2370 int use_lpc;
2371
2372 /**
2373 * LPC coefficient precision - used by FLAC encoder
f5bccd85
DB
2374 * - encoding: Set by user.
2375 * - decoding: unused
a403fc03
JR
2376 */
2377 int lpc_coeff_precision;
2378
2379 /**
f5bccd85
DB
2380 * - encoding: Set by user.
2381 * - decoding: unused
a403fc03
JR
2382 */
2383 int min_prediction_order;
2384
2385 /**
f5bccd85
DB
2386 * - encoding: Set by user.
2387 * - decoding: unused
a403fc03
JR
2388 */
2389 int max_prediction_order;
2390
2391 /**
2392 * search method for selecting prediction order
f5bccd85
DB
2393 * - encoding: Set by user.
2394 * - decoding: unused
a403fc03
JR
2395 */
2396 int prediction_order_method;
2397
2398 /**
f5bccd85
DB
2399 * - encoding: Set by user.
2400 * - decoding: unused
a403fc03
JR
2401 */
2402 int min_partition_order;
2403
2404 /**
f5bccd85
DB
2405 * - encoding: Set by user.
2406 * - decoding: unused
a403fc03
JR
2407 */
2408 int max_partition_order;
80d617f5
BC
2409
2410 /**
2411 * GOP timecode frame start number, in non drop frame format
f5bccd85
DB
2412 * - encoding: Set by user.
2413 * - decoding: unused
80d617f5
BC
2414 */
2415 int64_t timecode_frame_start;
b1ec601f 2416
0d72e7d0 2417#if LIBAVCODEC_VERSION_MAJOR < 53
b1ec601f 2418 /**
85947156
VS
2419 * Decoder should decode to this many channels if it can (0 for default)
2420 * - encoding: unused
2421 * - decoding: Set by user.
0d72e7d0 2422 * @deprecated Deprecated in favor of request_channel_layout.
b1ec601f
RD
2423 */
2424 int request_channels;
0d72e7d0 2425#endif
1408352a
JR
2426
2427 /**
2428 * Percentage of dynamic range compression to be applied by the decoder.
2429 * The default value is 1.0, corresponding to full compression.
2430 * - encoding: unused
2431 * - decoding: Set by user.
2432 */
2433 float drc_scale;
79de84f2
MN
2434
2435 /**
2436 * opaque 64bit number (generally a PTS) that will be reordered and
2437 * output in AVFrame.reordered_opaque
2438 * - encoding: unused
2439 * - decoding: Set by user.
2440 */
2441 int64_t reordered_opaque;
312420f3
PR
2442
2443 /**
2444 * Bits per sample/pixel of internal libavcodec pixel/sample format.
2445 * This field is applicable only when sample_fmt is SAMPLE_FMT_S32.
2446 * - encoding: set by user.
2447 * - decoding: set by libavcodec.
2448 */
2449 int bits_per_raw_sample;
0d72e7d0
PR
2450
2451 /**
2452 * Audio channel layout.
2453 * - encoding: set by user.
2454 * - decoding: set by libavcodec.
2455 */
2456 int64_t channel_layout;
2457
2458 /**
2459 * Request decoder to use this channel layout if it can (0 for default)
2460 * - encoding: unused
2461 * - decoding: Set by user.
2462 */
2463 int64_t request_channel_layout;
3bff4d8b
BC
2464
2465 /**
2466 * Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow.
2467 * - encoding: Set by user.
2468 * - decoding: unused.
2469 */
2470 float rc_max_available_vbv_use;
2471
2472 /**
2473 * Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow.
2474 * - encoding: Set by user.
2475 * - decoding: unused.
2476 */
2477 float rc_min_vbv_overflow_use;
40e5d31b
GB
2478
2479 /**
2480 * Hardware accelerator in use
2481 * - encoding: unused.
2482 * - decoding: Set by libavcodec
2483 */
2484 struct AVHWAccel *hwaccel;
3797c74b
MN
2485
2486 /**
2487 * For some codecs, the time base is closer to the field rate than the frame rate.
2488 * Most notably, H.264 and MPEG-2 specify time_base as half of frame duration
2489 * if no telecine is used ...
2490 *
2491 * Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2.
2492 */
2493 int ticks_per_frame;
1aea7018
GB
2494
2495 /**
2496 * Hardware accelerator context.
2497 * For some hardware accelerators, a global context needs to be
2498 * provided by the user. In that case, this holds display-dependent
2499 * data FFmpeg cannot instantiate itself. Please refer to the
2500 * FFmpeg HW accelerator documentation to know how to fill this
2501 * is. e.g. for VA API, this is a struct vaapi_context.
2502 * - encoding: unused
2503 * - decoding: Set by user
2504 */
2505 void *hwaccel_context;
4ee6a5c1
MN
2506
2507 /**
2508 * Chromaticity coordinates of the source primaries.
2509 * - encoding: Set by user
2510 * - decoding: Set by libavcodec
2511 */
2512 enum AVColorPrimaries color_primaries;
2513
2514 /**
2515 * Color Transfer Characteristic.
2516 * - encoding: Set by user
2517 * - decoding: Set by libavcodec
2518 */
2519 enum AVColorTransferCharacteristic color_trc;
2520
2521 /**
2522 * YUV colorspace type.
2523 * - encoding: Set by user
2524 * - decoding: Set by libavcodec
2525 */
2526 enum AVColorSpace colorspace;
2527
2528 /**
2529 * MPEG vs JPEG YUV range.
2530 * - encoding: Set by user
2531 * - decoding: Set by libavcodec
2532 */
2533 enum AVColorRange color_range;
580a7465
DC
2534
2535 /**
2536 * This defines the location of chroma samples.
2537 * - encoding: Set by user
2538 * - decoding: Set by libavcodec
2539 */
8ea08bec 2540 enum AVChromaLocation chroma_sample_location;
8d23a86f
RD
2541
2542 /**
2543 * The codec may call this to execute several independent things.
2544 * It will return only after finishing all tasks.
2545 * The user may replace this with some multithreaded implementation,
2546 * the default implementation will execute the parts serially.
2547 * Also see avcodec_thread_init and e.g. the --enable-pthread configure option.
2548 * @param c context passed also to func
2549 * @param count the number of things to execute
2550 * @param arg2 argument passed unchanged to func
2551 * @param ret return values of executed functions, must have space for "count" values. May be NULL.
2552 * @param func function that will be called count times, with jobnr from 0 to count-1.
2553 * threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no
2554 * two instances of func executing at the same time will have the same threadnr.
2555 * @return always 0 currently, but code should handle a future improvement where when any call to func
2556 * returns < 0 no further calls to func may be done and < 0 is returned.
2557 * - encoding: Set by libavcodec, user can override.
2558 * - decoding: Set by libavcodec, user can override.
2559 */
2560 int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count);
096c87f6
JGG
2561
2562 /**
2563 * explicit P-frame weighted prediction analysis method
2564 * 0: off
2565 * 1: fast blind weighting (one reference duplicate with -1 offset)
2566 * 2: smart weighting (full fade detection analysis)
2567 * - encoding: Set by user.
2568 * - decoding: unused
2569 */
2570 int weighted_p_pred;
de6d9b64
FB
2571} AVCodecContext;
2572
64863965
MN
2573/**
2574 * AVCodec.
2575 */
de6d9b64 2576typedef struct AVCodec {
6b0cdb6e
NG
2577 /**
2578 * Name of the codec implementation.
2579 * The name is globally unique among encoders and among decoders (but an
2580 * encoder and a decoder can share the same name).
2581 * This is the primary way to find a codec from the user perspective.
2582 */
18f77016 2583 const char *name;
5d234974 2584 enum CodecType type;
9297ddd3 2585 enum CodecID id;
de6d9b64
FB
2586 int priv_data_size;
2587 int (*init)(AVCodecContext *);
0c1a9eda 2588 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
de6d9b64 2589 int (*close)(AVCodecContext *);
7a00bbad 2590 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt);
a2d11246
MN
2591 /**
2592 * Codec capabilities.
2593 * see CODEC_CAP_*
2594 */
bf89e6b1 2595 int capabilities;
de6d9b64 2596 struct AVCodec *next;
c8cf325a
MN
2597 /**
2598 * Flush buffers.
2599 * Will be called when seeking
2600 */
7a06ff14 2601 void (*flush)(AVCodecContext *);
716e31ea 2602 const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0}
1beb670a 2603 const enum PixelFormat *pix_fmts; ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1
fe4bf374 2604 /**
bf7e799c
SS
2605 * Descriptive name for the codec, meant to be more human readable than name.
2606 * You should use the NULL_IF_CONFIG_SMALL() macro to define it.
fe4bf374
SS
2607 */
2608 const char *long_name;
3ade5d56 2609 const int *supported_samplerates; ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
88a07af7 2610 const enum SampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1
0d72e7d0 2611 const int64_t *channel_layouts; ///< array of support channel layouts, or NULL if unknown. array is terminated by 0
de6d9b64
FB
2612} AVCodec;
2613
97d96aaa 2614/**
40e5d31b
GB
2615 * AVHWAccel.
2616 */
2617typedef struct AVHWAccel {
2618 /**
2619 * Name of the hardware accelerated codec.
2620 * The name is globally unique among encoders and among decoders (but an
2621 * encoder and a decoder can share the same name).
2622 */
2623 const char *name;
2624
2625 /**
2626 * Type of codec implemented by the hardware accelerator.
2627 *
2628 * See CODEC_TYPE_xxx
2629 */
2630 enum CodecType type;
2631
2632 /**
2633 * Codec implemented by the hardware accelerator.
2634 *
2635 * See CODEC_ID_xxx
2636 */
2637 enum CodecID id;
2638
2639 /**
2640 * Supported pixel format.
2641 *
2642 * Only hardware accelerated formats are supported here.
2643 */
2644 enum PixelFormat pix_fmt;
2645
2646 /**
2647 * Hardware accelerated codec capabilities.
2648 * see FF_HWACCEL_CODEC_CAP_*
2649 */
2650 int capabilities;
2651
2652 struct AVHWAccel *next;
2653
2654 /**
2655 * Called at the beginning of each frame or field picture.
2656 *
2657 * Meaningful frame information (codec specific) is guaranteed to
2658 * be parsed at this point. This function is mandatory.
2659 *
bf7e799c 2660 * Note that buf can be NULL along with buf_size set to 0.
40e5d31b
GB
2661 * Otherwise, this means the whole frame is available at this point.
2662 *
2663 * @param avctx the codec context
2664 * @param buf the frame data buffer base
2665 * @param buf_size the size of the frame in bytes
2666 * @return zero if successful, a negative value otherwise
2667 */
2668 int (*start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
2669
2670 /**
2671 * Callback for each slice.
2672 *
2673 * Meaningful slice information (codec specific) is guaranteed to
2674 * be parsed at this point. This function is mandatory.
2675 *
2676 * @param avctx the codec context
2677 * @param buf the slice data buffer base
2678 * @param buf_size the size of the slice in bytes
2679 * @return zero if successful, a negative value otherwise
2680 */
2681 int (*decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
2682
2683 /**
2684 * Called at the end of each frame or field picture.
2685 *
2686 * The whole picture is parsed at this point and can now be sent
2687 * to the hardware accelerator. This function is mandatory.
2688 *
2689 * @param avctx the codec context
2690 * @return zero if successful, a negative value otherwise
2691 */
2692 int (*end_frame)(AVCodecContext *avctx);
68e5d523
GB
2693
2694 /**
2695 * Size of HW accelerator private data.
2696 *
cd823ff9
GB
2697 * Private data is allocated with av_mallocz() before
2698 * AVCodecContext.get_buffer() and deallocated after
2699 * AVCodecContext.release_buffer().
68e5d523
GB
2700 */
2701 int priv_data_size;
40e5d31b
GB
2702} AVHWAccel;
2703
2704/**
d7425f59
MN
2705 * four components are given, that's all.
2706 * the last component is alpha
2707 */
de6d9b64 2708typedef struct AVPicture {
0c1a9eda 2709 uint8_t *data[4];
cd394651 2710 int linesize[4]; ///< number of bytes per line
de6d9b64
FB
2711} AVPicture;
2712
2bbd8571 2713#if LIBAVCODEC_VERSION_MAJOR < 53
ba118447 2714/**
85947156
VS
2715 * AVPaletteControl
2716 * This structure defines a method for communicating palette changes
2717 * between and demuxer and a decoder.
2718 *
671adb17 2719 * @deprecated Use AVPacket to send palette changes instead.
85947156 2720 * This is totally broken.
ba118447 2721 */
2e99641b 2722#define AVPALETTE_SIZE 1024
432d84c3 2723#define AVPALETTE_COUNT 256
ba118447
MM
2724typedef struct AVPaletteControl {
2725
f5bccd85
DB
2726 /* Demuxer sets this to 1 to indicate the palette has changed;
2727 * decoder resets to 0. */
ba118447
MM
2728 int palette_changed;
2729
2a2bbcb0
MM
2730 /* 4-byte ARGB palette entries, stored in native byte order; note that
2731 * the individual palette components should be on a 8-bit scale; if
f5bccd85
DB
2732 * the palette data comes from an IBM VGA native format, the component
2733 * data is probably 6 bits in size and needs to be scaled. */
2e99641b 2734 unsigned int palette[AVPALETTE_COUNT];
ba118447 2735
18239edf 2736} AVPaletteControl attribute_deprecated;
2bbd8571 2737#endif
ba118447 2738
c66216ed
MN
2739enum AVSubtitleType {
2740 SUBTITLE_NONE,
2741
2742 SUBTITLE_BITMAP, ///< A bitmap, pict will be set
2743
2744 /**
2745 * Plain text, the text field must be set by the decoder and is
2746 * authoritative. ass and pict fields may contain approximations.
2747 */
2748 SUBTITLE_TEXT,
2749
2750 /**
2751 * Formatted text, the ass field must be set by the decoder and is
2752 * authoritative. pict and text fields may contain approximations.
2753 */
2754 SUBTITLE_ASS,
2755};
2756
c6ec28b1 2757typedef struct AVSubtitleRect {
ebc466bb
MN
2758 int x; ///< top left corner of pict, undefined when pict is not set
2759 int y; ///< top left corner of pict, undefined when pict is not set
2760 int w; ///< width of pict, undefined when pict is not set
2761 int h; ///< height of pict, undefined when pict is not set
2762 int nb_colors; ///< number of colors in pict, undefined when pict is not set
25b4c651
MN
2763
2764 /**
2765 * data+linesize for the bitmap of this subtitle.
2766 * can be set for text/ass as well once they where rendered
2767 */
2768 AVPicture pict;
f656106f
MN
2769 enum AVSubtitleType type;
2770
2771 char *text; ///< 0 terminated plain UTF-8 text
2772
2773 /**
2774 * 0 terminated ASS/SSA compatible event line.
2775 * The pressentation of this is unaffected by the other values in this
2776 * struct.
2777 */
2778 char *ass;
c6ec28b1
MN
2779} AVSubtitleRect;
2780
2781typedef struct AVSubtitle {
2782 uint16_t format; /* 0 = graphics */
2783 uint32_t start_display_time; /* relative to packet pts, in ms */
2784 uint32_t end_display_time; /* relative to packet pts, in ms */
ebc466bb 2785 unsigned num_rects;
db4fac64 2786 AVSubtitleRect **rects;
4bbe788a 2787 int64_t pts; ///< Same as packet pts, in AV_TIME_BASE
240c1657
FB
2788} AVSubtitle;
2789
cdd8930e
TB
2790/* packet functions */
2791
80d403fc
RD
2792/**
2793 * @deprecated use NULL instead
2794 */
2795attribute_deprecated void av_destruct_packet_nofree(AVPacket *pkt);
cdd8930e
TB
2796
2797/**
2798 * Default packet destructor.
2799 */
2800void av_destruct_packet(AVPacket *pkt);
2801
2802/**
2803 * Initialize optional fields of a packet with default values.
2804 *
2805 * @param pkt packet
2806 */
2807void av_init_packet(AVPacket *pkt);
2808
2809/**
2810 * Allocate the payload of a packet and initialize its fields with
2811 * default values.
2812 *
2813 * @param pkt packet
2814 * @param size wanted payload size
2815 * @return 0 if OK, AVERROR_xxx otherwise
2816 */
2817int av_new_packet(AVPacket *pkt, int size);
2818
2819/**
feb993e5
RD
2820 * Reduce packet size, correctly zeroing padding
2821 *
2822 * @param pkt packet
2823 * @param size new size
2824 */
2825void av_shrink_packet(AVPacket *pkt, int size);
2826
2827/**
cdd8930e
TB
2828 * @warning This is a hack - the packet memory allocation stuff is broken. The
2829 * packet is allocated if it was not really allocated.
2830 */
2831int av_dup_packet(AVPacket *pkt);
2832
2833/**
2834 * Free a packet.
2835 *
2836 * @param pkt packet to free
2837 */
ce1d9c85 2838void av_free_packet(AVPacket *pkt);
240c1657 2839
de6d9b64
FB
2840/* resample.c */
2841
2842struct ReSampleContext;
aaaf1635 2843struct AVResampleContext;
de6d9b64
FB
2844
2845typedef struct ReSampleContext ReSampleContext;
2846
d1e3c6fd
BC
2847#if LIBAVCODEC_VERSION_MAJOR < 53
2848/**
2849 * @deprecated Use av_audio_resample_init() instead.
2850 */
2851attribute_deprecated ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2852 int output_rate, int input_rate);
2853#endif
2854/**
2855 * Initializes audio resampling context
2856 *
2857 * @param output_channels number of output channels
2858 * @param input_channels number of input channels
2859 * @param output_rate output sample rate
2860 * @param input_rate input sample rate
2861 * @param sample_fmt_out requested output sample format
2862 * @param sample_fmt_in input sample format
2863 * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
2864 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
2865 * @param linear If 1 then the used FIR filter will be linearly interpolated
2866 between the 2 closest, if 0 the closest will be used
2867 * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
2868 * @return allocated ReSampleContext, NULL if error occured
2869 */
2870ReSampleContext *av_audio_resample_init(int output_channels, int input_channels,
2871 int output_rate, int input_rate,
2872 enum SampleFormat sample_fmt_out,
2873 enum SampleFormat sample_fmt_in,
2874 int filter_length, int log2_phase_count,
2875 int linear, double cutoff);
2876
de6d9b64
FB
2877int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2878void audio_resample_close(ReSampleContext *s);
2879
3136fcf4
MN
2880
2881/**
2882 * Initializes an audio resampler.
2883 * Note, if either rate is not an integer then simply scale both rates up so they are.
990058bd
MN
2884 * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
2885 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
2886 * @param linear If 1 then the used FIR filter will be linearly interpolated
2887 between the 2 closest, if 0 the closest will be used
2888 * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
3136fcf4 2889 */
6e225de2 2890struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
3136fcf4
MN
2891
2892/**
2893 * resamples.
2894 * @param src an array of unconsumed samples
2895 * @param consumed the number of samples of src which have been consumed are returned here
2896 * @param src_size the number of unconsumed samples available
2897 * @param dst_size the amount of space in samples available in dst
2898 * @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.
2899 * @return the number of samples written in dst or -1 if an error occurred
2900 */
aaaf1635 2901int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
3136fcf4
MN
2902
2903
2904/**
2905 * Compensates samplerate/timestamp drift. The compensation is done by changing
2906 * the resampler parameters, so no audible clicks or similar distortions occur
2907 * @param compensation_distance distance in output samples over which the compensation should be performed
2908 * @param sample_delta number of output samples which should be output less
2909 *
2910 * example: av_resample_compensate(c, 10, 500)
2911 * here instead of 510 samples only 500 samples would be output
2912 *
2913 * note, due to rounding the actual compensation might be slightly different,
2914 * especially if the compensation_distance is large and the in_rate used during init is small
2915 */
2d48eddd 2916void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
d88443ae 2917void av_resample_close(struct AVResampleContext *c);
aaaf1635 2918
75917b88
DH
2919/**
2920 * Allocate memory for a picture. Call avpicture_free to free it.
2921 *
f5bccd85
DB
2922 * @param picture the picture to be filled in
2923 * @param pix_fmt the format of the picture
2924 * @param width the width of the picture
2925 * @param height the height of the picture
2926 * @return zero if successful, a negative value if not
75917b88 2927 */
a61ec8e7 2928int avpicture_alloc(AVPicture *picture, enum PixelFormat pix_fmt, int width, int height);
75917b88 2929
8fc3d25c
PI
2930/**
2931 * Free a picture previously allocated by avpicture_alloc().
2932 *
f5bccd85 2933 * @param picture the AVPicture to be freed
8fc3d25c 2934 */
75917b88
DH
2935void avpicture_free(AVPicture *picture);
2936
392cf77a 2937/**
f5bccd85 2938 * Fill in the AVPicture fields.
392cf77a
PI
2939 * The fields of the given AVPicture are filled in by using the 'ptr' address
2940 * which points to the image data buffer. Depending on the specified picture
2941 * format, one or multiple image data pointers and line sizes will be set.
2942 * If a planar format is specified, several pointers will be set pointing to
2943 * the different picture planes and the line sizes of the different planes
2944 * will be stored in the lines_sizes array.
899a8fa1 2945 * Call with ptr == NULL to get the required size for the ptr buffer.
392cf77a 2946 *
f5bccd85 2947 * @param picture AVPicture whose fields are to be filled in
392cf77a 2948 * @param ptr Buffer which will contain or contains the actual image data
f5bccd85
DB
2949 * @param pix_fmt The format in which the picture data is stored.
2950 * @param width the width of the image in pixels
2951 * @param height the height of the image in pixels
2952 * @return size of the image data in bytes
392cf77a 2953 */
0c1a9eda 2954int avpicture_fill(AVPicture *picture, uint8_t *ptr,
4a30fff6 2955 enum PixelFormat pix_fmt, int width, int height);
a61ec8e7 2956int avpicture_layout(const AVPicture* src, enum PixelFormat pix_fmt, int width, int height,
63167088 2957 unsigned char *dest, int dest_size);
392cf77a
PI
2958
2959/**
2960 * Calculate the size in bytes that a picture of the given width and height
2961 * would occupy if stored in the given picture format.
899a8fa1
RD
2962 * Note that this returns the size of a compact representation as generated
2963 * by avpicture_layout, which can be smaller than the size required for e.g.
2964 * avpicture_fill.
392cf77a 2965 *
f5bccd85
DB
2966 * @param pix_fmt the given picture format
2967 * @param width the width of the image
2968 * @param height the height of the image
899a8fa1 2969 * @return Image data size in bytes or -1 on error (e.g. too large dimensions).
392cf77a 2970 */
a61ec8e7
SS
2971int avpicture_get_size(enum PixelFormat pix_fmt, int width, int height);
2972void avcodec_get_chroma_sub_sample(enum PixelFormat pix_fmt, int *h_shift, int *v_shift);
2973const char *avcodec_get_pix_fmt_name(enum PixelFormat pix_fmt);
21adafec 2974void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
d89f692f
SS
2975
2976/**
bf7e799c 2977 * Returns the pixel format corresponding to the name name.
d89f692f 2978 *
bf7e799c 2979 * If there is no pixel format with name name, then looks for a
d89f692f 2980 * pixel format with the name corresponding to the native endian
bf7e799c 2981 * format of name.
d89f692f
SS
2982 * For example in a little-endian system, first looks for "gray16",
2983 * then for "gray16le".
2984 *
bf7e799c 2985 * Finally if no pixel format has been found, returns PIX_FMT_NONE.
d89f692f 2986 */
63167088 2987enum PixelFormat avcodec_get_pix_fmt(const char* name);
fa4dc9f0
SS
2988
2989/**
2990 * Returns a value representing the fourCC code associated to the
2991 * pixel format pix_fmt, or 0 if no associated fourCC code can be
2992 * found.
2993 */
2994unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat pix_fmt);
219b06c6 2995
81299d42
PI
2996#define FF_LOSS_RESOLUTION 0x0001 /**< loss due to resolution change */
2997#define FF_LOSS_DEPTH 0x0002 /**< loss due to color depth change */
2998#define FF_LOSS_COLORSPACE 0x0004 /**< loss due to color space conversion */
2999#define FF_LOSS_ALPHA 0x0008 /**< loss of alpha bits */
3000#define FF_LOSS_COLORQUANT 0x0010 /**< loss due to color quantization */
3001#define FF_LOSS_CHROMA 0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
fab21997 3002
392cf77a 3003/**
81299d42
PI
3004 * Computes what kind of losses will occur when converting from one specific
3005 * pixel format to another.
3006 * When converting from one pixel format to another, information loss may occur.
3007 * For example, when converting from RGB24 to GRAY, the color information will
3008 * be lost. Similarly, other losses occur when converting from some formats to
3009 * other formats. These losses can involve loss of chroma, but also loss of
3010 * resolution, loss of color depth, loss due to the color space conversion, loss
3011 * of the alpha bits or loss due to color quantization.
f5bccd85
DB
3012 * avcodec_get_fix_fmt_loss() informs you about the various types of losses
3013 * which will occur when converting from one pixel format to another.
81299d42 3014 *
f5bccd85
DB
3015 * @param[in] dst_pix_fmt destination pixel format
3016 * @param[in] src_pix_fmt source pixel format
81299d42
PI
3017 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
3018 * @return Combination of flags informing you what kind of losses will occur.
392cf77a 3019 */
a61ec8e7 3020int avcodec_get_pix_fmt_loss(enum PixelFormat dst_pix_fmt, enum PixelFormat src_pix_fmt,
fab21997 3021 int has_alpha);
392cf77a
PI
3022
3023/**
81299d42
PI
3024 * Finds the best pixel format to convert to given a certain source pixel
3025 * format. When converting from one pixel format to another, information loss
3026 * may occur. For example, when converting from RGB24 to GRAY, the color
3027 * information will be lost. Similarly, other losses occur when converting from
3028 * some formats to other formats. avcodec_find_best_pix_fmt() searches which of
f5bccd85
DB
3029 * the given pixel formats should be used to suffer the least amount of loss.
3030 * The pixel formats from which it chooses one, are determined by the
bf7e799c 3031 * pix_fmt_mask parameter.
81299d42
PI
3032 *
3033 * @code
3034 * src_pix_fmt = PIX_FMT_YUV420P;
3035 * pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << PIX_FMT_RGB24);
3036 * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
3037 * @endcode
3038 *
f5bccd85
DB
3039 * @param[in] pix_fmt_mask bitmask determining which pixel format to choose from
3040 * @param[in] src_pix_fmt source pixel format
81299d42
PI
3041 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
3042 * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
3043 * @return The best pixel format to convert to or -1 if none was found.
392cf77a 3044 */
a61ec8e7 3045enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt,
fab21997
FB
3046 int has_alpha, int *loss_ptr);
3047
c3b95b1d
SS
3048
3049/**
3050 * Print in buf the string corresponding to the pixel format with
3051 * number pix_fmt, or an header if pix_fmt is negative.
3052 *
9bd51b9a
PI
3053 * @param[in] buf the buffer where to write the string
3054 * @param[in] buf_size the size of buf
3055 * @param[in] pix_fmt the number of the pixel format to print the corresponding info string, or
c3b95b1d
SS
3056 * a negative value to print the corresponding header.
3057 * Meaningful values for obtaining a pixel format info vary from 0 to PIX_FMT_NB -1.
3058 */
a61ec8e7 3059void avcodec_pix_fmt_string (char *buf, int buf_size, enum PixelFormat pix_fmt);
c3b95b1d 3060
0469baf1
FB
3061#define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
3062#define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
392cf77a
PI
3063
3064/**
3065 * Tell if an image really has transparent alpha values.
3066 * @return ored mask of FF_ALPHA_xxx constants
3067 */
da64ecc3 3068int img_get_alpha_info(const AVPicture *src,
a61ec8e7 3069 enum PixelFormat pix_fmt, int width, int height);
0469baf1 3070
219b06c6 3071/* deinterlace a picture */
392cf77a 3072/* deinterlace - if not supported return -1 */
da64ecc3 3073int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
a61ec8e7 3074 enum PixelFormat pix_fmt, int width, int height);
de6d9b64
FB
3075
3076/* external high level API */
3077
0334f799
SS
3078/**
3079 * If c is NULL, returns the first registered codec,
c1b02101 3080 * if c is non-NULL, returns the next registered codec after c,
0334f799
SS
3081 * or NULL if c is the last one.
3082 */
55b9e69a 3083AVCodec *av_codec_next(AVCodec *c);
de6d9b64 3084
96afa6be
SS
3085/**
3086 * Returns the LIBAVCODEC_VERSION_INT constant.
3087 */
51a49663 3088unsigned avcodec_version(void);
96afa6be 3089
f9ec0aa1 3090/**
c1736936
DB
3091 * Returns the libavcodec build-time configuration.
3092 */
41600690 3093const char *avcodec_configuration(void);
c1736936
DB
3094
3095/**
3096 * Returns the libavcodec license.
3097 */
41600690 3098const char *avcodec_license(void);
c1736936
DB
3099
3100/**
f9ec0aa1
PI
3101 * Initializes libavcodec.
3102 *
bf7e799c 3103 * @warning This function must be called before any other libavcodec
f9ec0aa1
PI
3104 * function.
3105 */
de6d9b64
FB
3106void avcodec_init(void);
3107
9d385cfe 3108#if LIBAVCODEC_VERSION_MAJOR < 53
d1ca187f 3109/**
85662f49
SS
3110 * @deprecated Deprecated in favor of avcodec_register().
3111 */
3112attribute_deprecated void register_avcodec(AVCodec *codec);
9d385cfe 3113#endif
85662f49
SS
3114
3115/**
bf7e799c 3116 * Register the codec codec and initialize libavcodec.
d1ca187f
SS
3117 *
3118 * @see avcodec_init()
3119 */
85662f49 3120void avcodec_register(AVCodec *codec);
f9ec0aa1
PI
3121
3122/**
645f7879 3123 * Finds a registered encoder with a matching codec ID.
f9ec0aa1 3124 *
f5bccd85 3125 * @param id CodecID of the requested encoder
f9ec0aa1
PI
3126 * @return An encoder if one was found, NULL otherwise.
3127 */
de6d9b64 3128AVCodec *avcodec_find_encoder(enum CodecID id);
f9ec0aa1
PI
3129
3130/**
645f7879 3131 * Finds a registered encoder with the specified name.
f9ec0aa1 3132 *
f5bccd85 3133 * @param name name of the requested encoder
f9ec0aa1
PI