avidec: do not export stream_codec_tag
[libav.git] / libavcodec / avcodec.h
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1/*
2 * copyright (c) 2001 Fabrice Bellard
3 *
2912e87a 4 * This file is part of Libav.
b78e7197 5 *
2912e87a 6 * Libav is free software; you can redistribute it and/or
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7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
b78e7197 9 * version 2.1 of the License, or (at your option) any later version.
04d7f601 10 *
2912e87a 11 * Libav is distributed in the hope that it will be useful,
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
2912e87a 17 * License along with Libav; if not, write to the Free Software
e5a389a1 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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19 */
20
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21#ifndef AVCODEC_AVCODEC_H
22#define AVCODEC_AVCODEC_H
a96b68b7 23
36df8805 24/**
ba87f080 25 * @file
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26 * @ingroup libavc
27 * Libavcodec external API header
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28 */
29
c60208e7 30#include <errno.h>
737eb597 31#include "libavutil/samplefmt.h"
bf4b0ed1 32#include "libavutil/attributes.h"
76a448ed 33#include "libavutil/avutil.h"
1afddbe5 34#include "libavutil/buffer.h"
7160bb71 35#include "libavutil/cpu.h"
0b950fe2 36#include "libavutil/dict.h"
7ecc2d40 37#include "libavutil/frame.h"
abc78a5a 38#include "libavutil/log.h"
d49ea4af 39#include "libavutil/pixfmt.h"
e91709ca 40#include "libavutil/rational.h"
de6d9b64 41
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42#include "version.h"
43
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44#if FF_API_FAST_MALLOC
45// to provide fast_*alloc
46#include "libavutil/mem.h"
47#endif
48
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49/**
50 * @defgroup libavc Encoding/Decoding Library
51 * @{
52 *
53 * @defgroup lavc_decoding Decoding
54 * @{
55 * @}
56 *
57 * @defgroup lavc_encoding Encoding
58 * @{
59 * @}
60 *
61 * @defgroup lavc_codec Codecs
62 * @{
63 * @defgroup lavc_codec_native Native Codecs
64 * @{
65 * @}
66 * @defgroup lavc_codec_wrappers External library wrappers
67 * @{
68 * @}
69 * @defgroup lavc_codec_hwaccel Hardware Accelerators bridge
70 * @{
71 * @}
72 * @}
73 * @defgroup lavc_internal Internal
74 * @{
75 * @}
76 * @}
77 *
78 */
79
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80/**
81 * @defgroup lavc_core Core functions/structures.
82 * @ingroup libavc
83 *
84 * Basic definitions, functions for querying libavcodec capabilities,
85 * allocating core structures, etc.
86 * @{
87 */
eda7c983 88
104e10fb 89
7ebf5927 90/**
48966b02 91 * Identify the syntax and semantics of the bitstream.
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92 * The principle is roughly:
93 * Two decoders with the same ID can decode the same streams.
94 * Two encoders with the same ID can encode compatible streams.
95 * There may be slight deviations from the principle due to implementation
96 * details.
7ebf5927 97 *
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98 * If you add a codec ID to this list, add it so that
99 * 1. no value of a existing codec ID changes (that would break ABI),
100 * 2. it is as close as possible to similar codecs.
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101 *
102 * After adding new codec IDs, do not forget to add an entry to the codec
103 * descriptor list and bump libavcodec minor version.
7ebf5927 104 */
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105enum AVCodecID {
106 AV_CODEC_ID_NONE,
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107
108 /* video codecs */
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109 AV_CODEC_ID_MPEG1VIDEO,
110 AV_CODEC_ID_MPEG2VIDEO, ///< preferred ID for MPEG-1/2 video decoding
19e30a58 111#if FF_API_XVMC
104e10fb 112 AV_CODEC_ID_MPEG2VIDEO_XVMC,
19e30a58 113#endif /* FF_API_XVMC */
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114 AV_CODEC_ID_H261,
115 AV_CODEC_ID_H263,
116 AV_CODEC_ID_RV10,
117 AV_CODEC_ID_RV20,
118 AV_CODEC_ID_MJPEG,
119 AV_CODEC_ID_MJPEGB,
120 AV_CODEC_ID_LJPEG,
121 AV_CODEC_ID_SP5X,
122 AV_CODEC_ID_JPEGLS,
123 AV_CODEC_ID_MPEG4,
124 AV_CODEC_ID_RAWVIDEO,
125 AV_CODEC_ID_MSMPEG4V1,
126 AV_CODEC_ID_MSMPEG4V2,
127 AV_CODEC_ID_MSMPEG4V3,
128 AV_CODEC_ID_WMV1,
129 AV_CODEC_ID_WMV2,
130 AV_CODEC_ID_H263P,
131 AV_CODEC_ID_H263I,
132 AV_CODEC_ID_FLV1,
133 AV_CODEC_ID_SVQ1,
134 AV_CODEC_ID_SVQ3,
135 AV_CODEC_ID_DVVIDEO,
136 AV_CODEC_ID_HUFFYUV,
137 AV_CODEC_ID_CYUV,
138 AV_CODEC_ID_H264,
139 AV_CODEC_ID_INDEO3,
140 AV_CODEC_ID_VP3,
141 AV_CODEC_ID_THEORA,
142 AV_CODEC_ID_ASV1,
143 AV_CODEC_ID_ASV2,
144 AV_CODEC_ID_FFV1,
145 AV_CODEC_ID_4XM,
146 AV_CODEC_ID_VCR1,
147 AV_CODEC_ID_CLJR,
148 AV_CODEC_ID_MDEC,
149 AV_CODEC_ID_ROQ,
150 AV_CODEC_ID_INTERPLAY_VIDEO,
151 AV_CODEC_ID_XAN_WC3,
152 AV_CODEC_ID_XAN_WC4,
153 AV_CODEC_ID_RPZA,
154 AV_CODEC_ID_CINEPAK,
155 AV_CODEC_ID_WS_VQA,
156 AV_CODEC_ID_MSRLE,
157 AV_CODEC_ID_MSVIDEO1,
158 AV_CODEC_ID_IDCIN,
159 AV_CODEC_ID_8BPS,
160 AV_CODEC_ID_SMC,
161 AV_CODEC_ID_FLIC,
162 AV_CODEC_ID_TRUEMOTION1,
163 AV_CODEC_ID_VMDVIDEO,
164 AV_CODEC_ID_MSZH,
165 AV_CODEC_ID_ZLIB,
166 AV_CODEC_ID_QTRLE,
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167 AV_CODEC_ID_TSCC,
168 AV_CODEC_ID_ULTI,
169 AV_CODEC_ID_QDRAW,
170 AV_CODEC_ID_VIXL,
171 AV_CODEC_ID_QPEG,
172 AV_CODEC_ID_PNG,
173 AV_CODEC_ID_PPM,
174 AV_CODEC_ID_PBM,
175 AV_CODEC_ID_PGM,
176 AV_CODEC_ID_PGMYUV,
177 AV_CODEC_ID_PAM,
178 AV_CODEC_ID_FFVHUFF,
179 AV_CODEC_ID_RV30,
180 AV_CODEC_ID_RV40,
181 AV_CODEC_ID_VC1,
182 AV_CODEC_ID_WMV3,
183 AV_CODEC_ID_LOCO,
184 AV_CODEC_ID_WNV1,
185 AV_CODEC_ID_AASC,
186 AV_CODEC_ID_INDEO2,
187 AV_CODEC_ID_FRAPS,
188 AV_CODEC_ID_TRUEMOTION2,
189 AV_CODEC_ID_BMP,
190 AV_CODEC_ID_CSCD,
191 AV_CODEC_ID_MMVIDEO,
192 AV_CODEC_ID_ZMBV,
193 AV_CODEC_ID_AVS,
194 AV_CODEC_ID_SMACKVIDEO,
195 AV_CODEC_ID_NUV,
196 AV_CODEC_ID_KMVC,
197 AV_CODEC_ID_FLASHSV,
198 AV_CODEC_ID_CAVS,
199 AV_CODEC_ID_JPEG2000,
200 AV_CODEC_ID_VMNC,
201 AV_CODEC_ID_VP5,
202 AV_CODEC_ID_VP6,
203 AV_CODEC_ID_VP6F,
204 AV_CODEC_ID_TARGA,
205 AV_CODEC_ID_DSICINVIDEO,
206 AV_CODEC_ID_TIERTEXSEQVIDEO,
207 AV_CODEC_ID_TIFF,
208 AV_CODEC_ID_GIF,
209 AV_CODEC_ID_DXA,
210 AV_CODEC_ID_DNXHD,
211 AV_CODEC_ID_THP,
212 AV_CODEC_ID_SGI,
213 AV_CODEC_ID_C93,
214 AV_CODEC_ID_BETHSOFTVID,
215 AV_CODEC_ID_PTX,
216 AV_CODEC_ID_TXD,
217 AV_CODEC_ID_VP6A,
218 AV_CODEC_ID_AMV,
219 AV_CODEC_ID_VB,
220 AV_CODEC_ID_PCX,
221 AV_CODEC_ID_SUNRAST,
222 AV_CODEC_ID_INDEO4,
223 AV_CODEC_ID_INDEO5,
224 AV_CODEC_ID_MIMIC,
225 AV_CODEC_ID_RL2,
226 AV_CODEC_ID_ESCAPE124,
227 AV_CODEC_ID_DIRAC,
228 AV_CODEC_ID_BFI,
229 AV_CODEC_ID_CMV,
230 AV_CODEC_ID_MOTIONPIXELS,
231 AV_CODEC_ID_TGV,
232 AV_CODEC_ID_TGQ,
233 AV_CODEC_ID_TQI,
234 AV_CODEC_ID_AURA,
235 AV_CODEC_ID_AURA2,
236 AV_CODEC_ID_V210X,
237 AV_CODEC_ID_TMV,
238 AV_CODEC_ID_V210,
239 AV_CODEC_ID_DPX,
240 AV_CODEC_ID_MAD,
241 AV_CODEC_ID_FRWU,
242 AV_CODEC_ID_FLASHSV2,
243 AV_CODEC_ID_CDGRAPHICS,
244 AV_CODEC_ID_R210,
245 AV_CODEC_ID_ANM,
246 AV_CODEC_ID_BINKVIDEO,
247 AV_CODEC_ID_IFF_ILBM,
248 AV_CODEC_ID_IFF_BYTERUN1,
249 AV_CODEC_ID_KGV1,
250 AV_CODEC_ID_YOP,
251 AV_CODEC_ID_VP8,
252 AV_CODEC_ID_PICTOR,
253 AV_CODEC_ID_ANSI,
254 AV_CODEC_ID_A64_MULTI,
255 AV_CODEC_ID_A64_MULTI5,
256 AV_CODEC_ID_R10K,
257 AV_CODEC_ID_MXPEG,
258 AV_CODEC_ID_LAGARITH,
259 AV_CODEC_ID_PRORES,
260 AV_CODEC_ID_JV,
261 AV_CODEC_ID_DFA,
262 AV_CODEC_ID_WMV3IMAGE,
263 AV_CODEC_ID_VC1IMAGE,
264 AV_CODEC_ID_UTVIDEO,
265 AV_CODEC_ID_BMV_VIDEO,
266 AV_CODEC_ID_VBLE,
267 AV_CODEC_ID_DXTORY,
268 AV_CODEC_ID_V410,
269 AV_CODEC_ID_XWD,
270 AV_CODEC_ID_CDXL,
271 AV_CODEC_ID_XBM,
272 AV_CODEC_ID_ZEROCODEC,
273 AV_CODEC_ID_MSS1,
274 AV_CODEC_ID_MSA1,
275 AV_CODEC_ID_TSCC2,
276 AV_CODEC_ID_MTS2,
277 AV_CODEC_ID_CLLC,
ee769c6a 278 AV_CODEC_ID_MSS2,
66aabd76 279 AV_CODEC_ID_VP9,
1232a164 280 AV_CODEC_ID_AIC,
350914fc 281 AV_CODEC_ID_ESCAPE130,
2d66a58c 282 AV_CODEC_ID_G2M,
c4bfa098 283 AV_CODEC_ID_WEBP,
9af7a852 284 AV_CODEC_ID_HNM4_VIDEO,
064698d3 285 AV_CODEC_ID_HEVC,
cde7df25 286 AV_CODEC_ID_FIC,
e50f5d3c 287 AV_CODEC_ID_ALIAS_PIX,
ae17878f 288 AV_CODEC_ID_BRENDER_PIX,
70daeacd 289 AV_CODEC_ID_PAF_VIDEO,
38389058 290 AV_CODEC_ID_EXR,
ac4b32df 291 AV_CODEC_ID_VP7,
a420ccd4 292 AV_CODEC_ID_SANM,
07761294 293 AV_CODEC_ID_SGIRLE,
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294 AV_CODEC_ID_MVC1,
295 AV_CODEC_ID_MVC2,
40c5ee99 296
f5bccd85 297 /* various PCM "codecs" */
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298 AV_CODEC_ID_FIRST_AUDIO = 0x10000, ///< A dummy id pointing at the start of audio codecs
299 AV_CODEC_ID_PCM_S16LE = 0x10000,
300 AV_CODEC_ID_PCM_S16BE,
301 AV_CODEC_ID_PCM_U16LE,
302 AV_CODEC_ID_PCM_U16BE,
303 AV_CODEC_ID_PCM_S8,
304 AV_CODEC_ID_PCM_U8,
305 AV_CODEC_ID_PCM_MULAW,
306 AV_CODEC_ID_PCM_ALAW,
307 AV_CODEC_ID_PCM_S32LE,
308 AV_CODEC_ID_PCM_S32BE,
309 AV_CODEC_ID_PCM_U32LE,
310 AV_CODEC_ID_PCM_U32BE,
311 AV_CODEC_ID_PCM_S24LE,
312 AV_CODEC_ID_PCM_S24BE,
313 AV_CODEC_ID_PCM_U24LE,
314 AV_CODEC_ID_PCM_U24BE,
315 AV_CODEC_ID_PCM_S24DAUD,
316 AV_CODEC_ID_PCM_ZORK,
317 AV_CODEC_ID_PCM_S16LE_PLANAR,
318 AV_CODEC_ID_PCM_DVD,
319 AV_CODEC_ID_PCM_F32BE,
320 AV_CODEC_ID_PCM_F32LE,
321 AV_CODEC_ID_PCM_F64BE,
322 AV_CODEC_ID_PCM_F64LE,
323 AV_CODEC_ID_PCM_BLURAY,
324 AV_CODEC_ID_PCM_LXF,
325 AV_CODEC_ID_S302M,
326 AV_CODEC_ID_PCM_S8_PLANAR,
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327 AV_CODEC_ID_PCM_S24LE_PLANAR,
328 AV_CODEC_ID_PCM_S32LE_PLANAR,
0147f198 329
f5bccd85 330 /* various ADPCM codecs */
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331 AV_CODEC_ID_ADPCM_IMA_QT = 0x11000,
332 AV_CODEC_ID_ADPCM_IMA_WAV,
333 AV_CODEC_ID_ADPCM_IMA_DK3,
334 AV_CODEC_ID_ADPCM_IMA_DK4,
335 AV_CODEC_ID_ADPCM_IMA_WS,
336 AV_CODEC_ID_ADPCM_IMA_SMJPEG,
337 AV_CODEC_ID_ADPCM_MS,
338 AV_CODEC_ID_ADPCM_4XM,
339 AV_CODEC_ID_ADPCM_XA,
340 AV_CODEC_ID_ADPCM_ADX,
341 AV_CODEC_ID_ADPCM_EA,
342 AV_CODEC_ID_ADPCM_G726,
343 AV_CODEC_ID_ADPCM_CT,
344 AV_CODEC_ID_ADPCM_SWF,
345 AV_CODEC_ID_ADPCM_YAMAHA,
346 AV_CODEC_ID_ADPCM_SBPRO_4,
347 AV_CODEC_ID_ADPCM_SBPRO_3,
348 AV_CODEC_ID_ADPCM_SBPRO_2,
349 AV_CODEC_ID_ADPCM_THP,
350 AV_CODEC_ID_ADPCM_IMA_AMV,
351 AV_CODEC_ID_ADPCM_EA_R1,
352 AV_CODEC_ID_ADPCM_EA_R3,
353 AV_CODEC_ID_ADPCM_EA_R2,
354 AV_CODEC_ID_ADPCM_IMA_EA_SEAD,
355 AV_CODEC_ID_ADPCM_IMA_EA_EACS,
356 AV_CODEC_ID_ADPCM_EA_XAS,
357 AV_CODEC_ID_ADPCM_EA_MAXIS_XA,
358 AV_CODEC_ID_ADPCM_IMA_ISS,
359 AV_CODEC_ID_ADPCM_G722,
360 AV_CODEC_ID_ADPCM_IMA_APC,
6f273093 361 AV_CODEC_ID_ADPCM_VIMA,
891f64b3 362
17179d2d 363 /* AMR */
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364 AV_CODEC_ID_AMR_NB = 0x12000,
365 AV_CODEC_ID_AMR_WB,
d663a1fd 366
b8414bbd 367 /* RealAudio codecs*/
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368 AV_CODEC_ID_RA_144 = 0x13000,
369 AV_CODEC_ID_RA_288,
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370
371 /* various DPCM codecs */
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372 AV_CODEC_ID_ROQ_DPCM = 0x14000,
373 AV_CODEC_ID_INTERPLAY_DPCM,
374 AV_CODEC_ID_XAN_DPCM,
375 AV_CODEC_ID_SOL_DPCM,
115329f1 376
ba0dabbf 377 /* audio codecs */
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378 AV_CODEC_ID_MP2 = 0x15000,
379 AV_CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3
380 AV_CODEC_ID_AAC,
381 AV_CODEC_ID_AC3,
382 AV_CODEC_ID_DTS,
383 AV_CODEC_ID_VORBIS,
384 AV_CODEC_ID_DVAUDIO,
385 AV_CODEC_ID_WMAV1,
386 AV_CODEC_ID_WMAV2,
387 AV_CODEC_ID_MACE3,
388 AV_CODEC_ID_MACE6,
389 AV_CODEC_ID_VMDAUDIO,
390 AV_CODEC_ID_FLAC,
391 AV_CODEC_ID_MP3ADU,
392 AV_CODEC_ID_MP3ON4,
393 AV_CODEC_ID_SHORTEN,
394 AV_CODEC_ID_ALAC,
395 AV_CODEC_ID_WESTWOOD_SND1,
396 AV_CODEC_ID_GSM, ///< as in Berlin toast format
397 AV_CODEC_ID_QDM2,
398 AV_CODEC_ID_COOK,
399 AV_CODEC_ID_TRUESPEECH,
400 AV_CODEC_ID_TTA,
401 AV_CODEC_ID_SMACKAUDIO,
402 AV_CODEC_ID_QCELP,
403 AV_CODEC_ID_WAVPACK,
404 AV_CODEC_ID_DSICINAUDIO,
405 AV_CODEC_ID_IMC,
406 AV_CODEC_ID_MUSEPACK7,
407 AV_CODEC_ID_MLP,
408 AV_CODEC_ID_GSM_MS, /* as found in WAV */
409 AV_CODEC_ID_ATRAC3,
f544c586 410#if FF_API_VOXWARE
104e10fb 411 AV_CODEC_ID_VOXWARE,
f544c586 412#endif
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413 AV_CODEC_ID_APE,
414 AV_CODEC_ID_NELLYMOSER,
415 AV_CODEC_ID_MUSEPACK8,
416 AV_CODEC_ID_SPEEX,
417 AV_CODEC_ID_WMAVOICE,
418 AV_CODEC_ID_WMAPRO,
419 AV_CODEC_ID_WMALOSSLESS,
420 AV_CODEC_ID_ATRAC3P,
421 AV_CODEC_ID_EAC3,
422 AV_CODEC_ID_SIPR,
423 AV_CODEC_ID_MP1,
424 AV_CODEC_ID_TWINVQ,
425 AV_CODEC_ID_TRUEHD,
426 AV_CODEC_ID_MP4ALS,
427 AV_CODEC_ID_ATRAC1,
428 AV_CODEC_ID_BINKAUDIO_RDFT,
429 AV_CODEC_ID_BINKAUDIO_DCT,
430 AV_CODEC_ID_AAC_LATM,
431 AV_CODEC_ID_QDMC,
432 AV_CODEC_ID_CELT,
433 AV_CODEC_ID_G723_1,
434 AV_CODEC_ID_G729,
435 AV_CODEC_ID_8SVX_EXP,
436 AV_CODEC_ID_8SVX_FIB,
437 AV_CODEC_ID_BMV_AUDIO,
438 AV_CODEC_ID_RALF,
439 AV_CODEC_ID_IAC,
440 AV_CODEC_ID_ILBC,
2a3d82ab 441 AV_CODEC_ID_OPUS,
9b500b8f 442 AV_CODEC_ID_COMFORT_NOISE,
57231e4d 443 AV_CODEC_ID_TAK,
f544c586 444 AV_CODEC_ID_METASOUND,
70daeacd 445 AV_CODEC_ID_PAF_AUDIO,
e2834567 446 AV_CODEC_ID_ON2AVC,
115329f1 447
240c1657 448 /* subtitle codecs */
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449 AV_CODEC_ID_FIRST_SUBTITLE = 0x17000, ///< A dummy ID pointing at the start of subtitle codecs.
450 AV_CODEC_ID_DVD_SUBTITLE = 0x17000,
451 AV_CODEC_ID_DVB_SUBTITLE,
452 AV_CODEC_ID_TEXT, ///< raw UTF-8 text
453 AV_CODEC_ID_XSUB,
454 AV_CODEC_ID_SSA,
455 AV_CODEC_ID_MOV_TEXT,
456 AV_CODEC_ID_HDMV_PGS_SUBTITLE,
457 AV_CODEC_ID_DVB_TELETEXT,
458 AV_CODEC_ID_SRT,
115329f1 459
7ce68923 460 /* other specific kind of codecs (generally used for attachments) */
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461 AV_CODEC_ID_FIRST_UNKNOWN = 0x18000, ///< A dummy ID pointing at the start of various fake codecs.
462 AV_CODEC_ID_TTF = 0x18000,
f8d7c9d3 463
104e10fb 464 AV_CODEC_ID_PROBE = 0x19000, ///< codec_id is not known (like AV_CODEC_ID_NONE) but lavf should attempt to identify it
0bef08e5 465
104e10fb 466 AV_CODEC_ID_MPEG2TS = 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS
f5bccd85 467 * stream (only used by libavformat) */
104e10fb 468 AV_CODEC_ID_MPEG4SYSTEMS = 0x20001, /**< _FAKE_ codec to indicate a MPEG-4 Systems
77b5c82b 469 * stream (only used by libavformat) */
104e10fb 470 AV_CODEC_ID_FFMETADATA = 0x21000, ///< Dummy codec for streams containing only metadata information.
de6d9b64 471};
dcedf586 472
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473/**
474 * This struct describes the properties of a single codec described by an
475 * AVCodecID.
d07ddc93 476 * @see avcodec_descriptor_get()
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477 */
478typedef struct AVCodecDescriptor {
479 enum AVCodecID id;
480 enum AVMediaType type;
481 /**
482 * Name of the codec described by this descriptor. It is non-empty and
483 * unique for each codec descriptor. It should contain alphanumeric
484 * characters and '_' only.
485 */
486 const char *name;
487 /**
488 * A more descriptive name for this codec. May be NULL.
489 */
490 const char *long_name;
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491 /**
492 * Codec properties, a combination of AV_CODEC_PROP_* flags.
493 */
494 int props;
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495} AVCodecDescriptor;
496
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497/**
498 * Codec uses only intra compression.
499 * Video codecs only.
500 */
501#define AV_CODEC_PROP_INTRA_ONLY (1 << 0)
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502/**
503 * Codec supports lossy compression. Audio and video codecs only.
504 * @note a codec may support both lossy and lossless
505 * compression modes
506 */
507#define AV_CODEC_PROP_LOSSY (1 << 1)
508/**
509 * Codec supports lossless compression. Audio and video codecs only.
510 */
511#define AV_CODEC_PROP_LOSSLESS (1 << 2)
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512/**
513 * Codec supports frame reordering. That is, the coded order (the order in which
514 * the encoded packets are output by the encoders / stored / input to the
515 * decoders) may be different from the presentation order of the corresponding
516 * frames.
517 *
518 * For codecs that do not have this property set, PTS and DTS should always be
519 * equal.
520 */
521#define AV_CODEC_PROP_REORDER (1 << 3)
51efed15 522
d7425f59 523/**
c8ef8464 524 * @ingroup lavc_decoding
cf713bb8 525 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
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526 * This is mainly needed because some optimized bitstream readers read
527 * 32 or 64 bit at once and could read over the end.<br>
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528 * Note: If the first 23 bits of the additional bytes are not 0, then damaged
529 * MPEG bitstreams could cause overread and segfault.
d7425f59 530 */
171b7b91 531#define FF_INPUT_BUFFER_PADDING_SIZE 8
d7425f59 532
0ecca7a4 533/**
f038515f 534 * @ingroup lavc_encoding
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535 * minimum encoding buffer size
536 * Used to avoid some checks during header writing.
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537 */
538#define FF_MIN_BUFFER_SIZE 16384
539
47146dfb 540
0e373b95 541/**
f038515f 542 * @ingroup lavc_encoding
bafc102b 543 * motion estimation type.
0e373b95 544 */
e4986da9 545enum Motion_Est_ID {
9b4dd1b8 546 ME_ZERO = 1, ///< no search, that is use 0,0 vector whenever one is needed
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547 ME_FULL,
548 ME_LOG,
549 ME_PHODS,
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550 ME_EPZS, ///< enhanced predictive zonal search
551 ME_X1, ///< reserved for experiments
552 ME_HEX, ///< hexagon based search
553 ME_UMH, ///< uneven multi-hexagon search
359bbdab 554 ME_TESA, ///< transformed exhaustive search algorithm
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555};
556
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557/**
558 * @ingroup lavc_decoding
559 */
8c3eba7c 560enum AVDiscard{
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561 /* We leave some space between them for extensions (drop some
562 * keyframes for intra-only or drop just some bidir frames). */
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563 AVDISCARD_NONE =-16, ///< discard nothing
564 AVDISCARD_DEFAULT = 0, ///< discard useless packets like 0 size packets in avi
565 AVDISCARD_NONREF = 8, ///< discard all non reference
566 AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
567 AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
568 AVDISCARD_ALL = 48, ///< discard all
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569};
570
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571enum AVAudioServiceType {
572 AV_AUDIO_SERVICE_TYPE_MAIN = 0,
573 AV_AUDIO_SERVICE_TYPE_EFFECTS = 1,
574 AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED = 2,
575 AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED = 3,
576 AV_AUDIO_SERVICE_TYPE_DIALOGUE = 4,
577 AV_AUDIO_SERVICE_TYPE_COMMENTARY = 5,
578 AV_AUDIO_SERVICE_TYPE_EMERGENCY = 6,
579 AV_AUDIO_SERVICE_TYPE_VOICE_OVER = 7,
580 AV_AUDIO_SERVICE_TYPE_KARAOKE = 8,
581 AV_AUDIO_SERVICE_TYPE_NB , ///< Not part of ABI
582};
583
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584/**
585 * @ingroup lavc_encoding
586 */
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587typedef struct RcOverride{
588 int start_frame;
589 int end_frame;
f5bccd85 590 int qscale; // If this is 0 then quality_factor will be used instead.
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591 float quality_factor;
592} RcOverride;
593
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594#if FF_API_MAX_BFRAMES
595/**
596 * @deprecated there is no libavcodec-wide limit on the number of B-frames
597 */
b0ec9efd 598#define FF_MAX_B_FRAMES 16
aa241229 599#endif
9dbcbd92 600
a949d72e 601/* encoding support
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602 These flags can be passed in AVCodecContext.flags before initialization.
603 Note: Not everything is supported yet.
a949d72e 604*/
de6d9b64 605
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606/**
607 * Allow decoders to produce frames with data planes that are not aligned
608 * to CPU requirements (e.g. due to cropping).
609 */
610#define CODEC_FLAG_UNALIGNED 0x0001
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611#define CODEC_FLAG_QSCALE 0x0002 ///< Use fixed qscale.
612#define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / advanced prediction for H.263.
28096e0a 613#define CODEC_FLAG_OUTPUT_CORRUPT 0x0008 ///< Output even those frames that might be corrupted
f5bccd85 614#define CODEC_FLAG_QPEL 0x0010 ///< Use qpel MC.
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615#if FF_API_GMC
616/**
617 * @deprecated use the "gmc" private option of the libxvid encoder
618 */
f5bccd85 619#define CODEC_FLAG_GMC 0x0020 ///< Use GMC.
64841491 620#endif
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621#if FF_API_MV0
622/**
623 * @deprecated use the flag "mv0" in the "mpv_flags" private option of the
624 * mpegvideo encoders
625 */
626#define CODEC_FLAG_MV0 0x0040
627#endif
5fccedaa 628#if FF_API_INPUT_PRESERVED
1ba8f5eb 629/**
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630 * @deprecated passing reference-counted frames to the encoders replaces this
631 * flag
1ba8f5eb 632 */
8b4c7dbc 633#define CODEC_FLAG_INPUT_PRESERVED 0x0100
5fccedaa 634#endif
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635#define CODEC_FLAG_PASS1 0x0200 ///< Use internal 2pass ratecontrol in first pass mode.
636#define CODEC_FLAG_PASS2 0x0400 ///< Use internal 2pass ratecontrol in second pass mode.
273b0cd3 637#define CODEC_FLAG_GRAY 0x2000 ///< Only decode/encode grayscale.
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638#if FF_API_EMU_EDGE
639/**
640 * @deprecated edges are not used/required anymore. I.e. this flag is now always
641 * set.
642 */
643#define CODEC_FLAG_EMU_EDGE 0x4000
644#endif
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645#define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding.
646#define CODEC_FLAG_TRUNCATED 0x00010000 /** Input bitstream might be truncated at a random
647 location instead of only at frame boundaries. */
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648#if FF_API_NORMALIZE_AQP
649/**
650 * @deprecated use the flag "naq" in the "mpv_flags" private option of the
651 * mpegvideo encoders
652 */
653#define CODEC_FLAG_NORMALIZE_AQP 0x00020000
654#endif
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655#define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT.
656#define CODEC_FLAG_LOW_DELAY 0x00080000 ///< Force low delay.
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657#define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< Place global headers in extradata instead of every keyframe.
658#define CODEC_FLAG_BITEXACT 0x00800000 ///< Use only bitexact stuff (except (I)DCT).
21e59552 659/* Fx : Flag for h263+ extra options */
f5bccd85 660#define CODEC_FLAG_AC_PRED 0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction
332f9ac4 661#define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
bb198e19 662#define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
f3eec1cf 663#define CODEC_FLAG_CLOSED_GOP 0x80000000
f5bccd85 664#define CODEC_FLAG2_FAST 0x00000001 ///< Allow non spec compliant speedup tricks.
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665#define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< Skip bitstream encoding.
666#define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< Place global headers at every keyframe instead of in extradata.
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667#define CODEC_FLAG2_IGNORE_CROP 0x00010000 ///< Discard cropping information from SPS.
668
f013cb81 669#define CODEC_FLAG2_CHUNKS 0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
6fc5b059 670
21e59552 671/* Unsupported options :
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672 * Syntax Arithmetic coding (SAC)
673 * Reference Picture Selection
eafcac6a 674 * Independent Segment Decoding */
21e59552 675/* /Fx */
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676/* codec capabilities */
677
f5bccd85 678#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback.
6814a25c 679/**
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680 * Codec uses get_buffer() for allocating buffers and supports custom allocators.
681 * If not set, it might not use get_buffer() at all or use operations that
682 * assume the buffer was allocated by avcodec_default_get_buffer.
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683 */
684#define CODEC_CAP_DR1 0x0002
d7425f59 685#define CODEC_CAP_TRUNCATED 0x0008
19e30a58 686#if FF_API_XVMC
f5bccd85 687/* Codec can export data for HW decoding (XvMC). */
5e5c247a 688#define CODEC_CAP_HWACCEL 0x0010
19e30a58 689#endif /* FF_API_XVMC */
115329f1 690/**
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691 * Encoder or decoder requires flushing with NULL input at the end in order to
692 * give the complete and correct output.
693 *
694 * NOTE: If this flag is not set, the codec is guaranteed to never be fed with
695 * with NULL data. The user can still send NULL data to the public encode
696 * or decode function, but libavcodec will not pass it along to the codec
697 * unless this flag is set.
698 *
699 * Decoders:
700 * The decoder has a non-zero delay and needs to be fed with avpkt->data=NULL,
ffeeae92 701 * avpkt->size=0 at the end to get the delayed data until the decoder no longer
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702 * returns frames.
703 *
704 * Encoders:
705 * The encoder needs to be fed with NULL data at the end of encoding until the
706 * encoder no longer returns data.
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707 *
708 * NOTE: For encoders implementing the AVCodec.encode2() function, setting this
709 * flag also means that the encoder must set the pts and duration for
710 * each output packet. If this flag is not set, the pts and duration will
711 * be determined by libavcodec from the input frame.
934982c4 712 */
6f824977 713#define CODEC_CAP_DELAY 0x0020
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714/**
715 * Codec can be fed a final frame with a smaller size.
716 * This can be used to prevent truncation of the last audio samples.
717 */
718#define CODEC_CAP_SMALL_LAST_FRAME 0x0040
549294fb 719#if FF_API_CAP_VDPAU
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720/**
721 * Codec can export data for HW decoding (VDPAU).
722 */
723#define CODEC_CAP_HWACCEL_VDPAU 0x0080
549294fb 724#endif
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725/**
726 * Codec can output multiple frames per AVPacket
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727 * Normally demuxers return one frame at a time, demuxers which do not do
728 * are connected to a parser to split what they return into proper frames.
729 * This flag is reserved to the very rare category of codecs which have a
730 * bitstream that cannot be split into frames without timeconsuming
731 * operations like full decoding. Demuxers carring such bitstreams thus
732 * may return multiple frames in a packet. This has many disadvantages like
733 * prohibiting stream copy in many cases thus it should only be considered
734 * as a last resort.
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735 */
736#define CODEC_CAP_SUBFRAMES 0x0100
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737/**
738 * Codec is experimental and is thus avoided in favor of non experimental
739 * encoders
740 */
741#define CODEC_CAP_EXPERIMENTAL 0x0200
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742/**
743 * Codec should fill in channel configuration and samplerate instead of container
744 */
745#define CODEC_CAP_CHANNEL_CONF 0x0400
b068660f 746#if FF_API_NEG_LINESIZES
16cfc961 747/**
b068660f 748 * @deprecated no codecs use this capability
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749 */
750#define CODEC_CAP_NEG_LINESIZES 0x0800
b068660f 751#endif
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752/**
753 * Codec supports frame-level multithreading.
754 */
755#define CODEC_CAP_FRAME_THREADS 0x1000
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756/**
757 * Codec supports slice-based (or partition-based) multithreading.
758 */
759#define CODEC_CAP_SLICE_THREADS 0x2000
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760/**
761 * Codec supports changed parameters at any point.
762 */
763#define CODEC_CAP_PARAM_CHANGE 0x4000
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764/**
765 * Codec supports avctx->thread_count == 0 (auto).
766 */
767#define CODEC_CAP_AUTO_THREADS 0x8000
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768/**
769 * Audio encoder supports receiving a different number of samples in each call.
770 */
771#define CODEC_CAP_VARIABLE_FRAME_SIZE 0x10000
bf89e6b1 772
b6094811 773#if FF_API_MB_TYPE
f5bccd85 774//The following defines may change, don't expect compatibility if you use them.
8d7ec294 775#define MB_TYPE_INTRA4x4 0x0001
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776#define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
777#define MB_TYPE_INTRA_PCM 0x0004 //FIXME H.264-specific
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778#define MB_TYPE_16x16 0x0008
779#define MB_TYPE_16x8 0x0010
780#define MB_TYPE_8x16 0x0020
781#define MB_TYPE_8x8 0x0040
782#define MB_TYPE_INTERLACED 0x0080
273b0cd3 783#define MB_TYPE_DIRECT2 0x0100 //FIXME
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784#define MB_TYPE_ACPRED 0x0200
785#define MB_TYPE_GMC 0x0400
786#define MB_TYPE_SKIP 0x0800
787#define MB_TYPE_P0L0 0x1000
788#define MB_TYPE_P1L0 0x2000
789#define MB_TYPE_P0L1 0x4000
790#define MB_TYPE_P1L1 0x8000
791#define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
792#define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
793#define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
794#define MB_TYPE_QUANT 0x00010000
795#define MB_TYPE_CBP 0x00020000
796//Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
b6094811 797#endif
8d7ec294 798
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799/**
800 * Pan Scan area.
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801 * This specifies the area which should be displayed.
802 * Note there may be multiple such areas for one frame.
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803 */
804typedef struct AVPanScan{
805 /**
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806 * id
807 * - encoding: Set by user.
808 * - decoding: Set by libavcodec.
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809 */
810 int id;
811
812 /**
813 * width and height in 1/16 pel
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814 * - encoding: Set by user.
815 * - decoding: Set by libavcodec.
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816 */
817 int width;
818 int height;
819
820 /**
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821 * position of the top left corner in 1/16 pel for up to 3 fields/frames
822 * - encoding: Set by user.
823 * - decoding: Set by libavcodec.
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824 */
825 int16_t position[3][2];
826}AVPanScan;
827
b45c8708 828#if FF_API_QSCALE_TYPE
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829#define FF_QSCALE_TYPE_MPEG1 0
830#define FF_QSCALE_TYPE_MPEG2 1
831#define FF_QSCALE_TYPE_H264 2
800274f8 832#define FF_QSCALE_TYPE_VP56 3
b45c8708 833#endif
4e00e76b 834
759001c5 835#if FF_API_GET_BUFFER
4e00e76b 836#define FF_BUFFER_TYPE_INTERNAL 1
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837#define FF_BUFFER_TYPE_USER 2 ///< direct rendering buffers (image is (de)allocated by user)
838#define FF_BUFFER_TYPE_SHARED 4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared.
839#define FF_BUFFER_TYPE_COPY 8 ///< Just a (modified) copy of some other buffer, don't deallocate anything.
4e00e76b 840
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841#define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore).
842#define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer.
843#define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content.
844#define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update).
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845#endif
846
847/**
848 * The decoder will keep a reference to the frame and may reuse it later.
849 */
850#define AV_GET_BUFFER_FLAG_REF (1 << 0)
074c4ca7 851
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852/**
853 * @defgroup lavc_packet AVPacket
854 *
855 * Types and functions for working with AVPacket.
856 * @{
857 */
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858enum AVPacketSideDataType {
859 AV_PKT_DATA_PALETTE,
195c123c 860 AV_PKT_DATA_NEW_EXTRADATA,
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861
862 /**
863 * An AV_PKT_DATA_PARAM_CHANGE side data packet is laid out as follows:
199ada49 864 * @code
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865 * u32le param_flags
866 * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT)
867 * s32le channel_count
868 * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT)
869 * u64le channel_layout
870 * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE)
871 * s32le sample_rate
872 * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS)
873 * s32le width
874 * s32le height
199ada49 875 * @endcode
30f3f625 876 */
fe75dc85 877 AV_PKT_DATA_PARAM_CHANGE,
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878
879 /**
880 * An AV_PKT_DATA_H263_MB_INFO side data packet contains a number of
881 * structures with info about macroblocks relevant to splitting the
882 * packet into smaller packets on macroblock edges (e.g. as for RFC 2190).
883 * That is, it does not necessarily contain info about all macroblocks,
884 * as long as the distance between macroblocks in the info is smaller
885 * than the target payload size.
886 * Each MB info structure is 12 bytes, and is laid out as follows:
199ada49 887 * @code
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888 * u32le bit offset from the start of the packet
889 * u8 current quantizer at the start of the macroblock
890 * u8 GOB number
891 * u16le macroblock address within the GOB
892 * u8 horizontal MV predictor
893 * u8 vertical MV predictor
894 * u8 horizontal MV predictor for block number 3
895 * u8 vertical MV predictor for block number 3
199ada49 896 * @endcode
30f3f625 897 */
bdc1220e 898 AV_PKT_DATA_H263_MB_INFO,
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899
900 /**
901 * This side data should be associated with an audio stream and contains
902 * ReplayGain information in form of the AVReplayGain struct.
903 */
904 AV_PKT_DATA_REPLAYGAIN,
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905
906 /**
907 * This side data contains a 3x3 transformation matrix describing an affine
908 * transformation that needs to be applied to the decoded video frames for
909 * correct presentation.
910 *
911 * See libavutil/display.h for a detailed description of the data.
912 */
913 AV_PKT_DATA_DISPLAYMATRIX,
93014864 914
37c46743 915 /**
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916 * This side data should be associated with a video stream and contains
917 * Stereoscopic 3D information in form of the AVStereo3D struct.
918 */
919 AV_PKT_DATA_STEREO3D,
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920};
921
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922typedef struct AVPacketSideData {
923 uint8_t *data;
924 int size;
925 enum AVPacketSideDataType type;
926} AVPacketSideData;
927
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928/**
929 * This structure stores compressed data. It is typically exported by demuxers
930 * and then passed as input to decoders, or received as output from encoders and
931 * then passed to muxers.
932 *
933 * For video, it should typically contain one compressed frame. For audio it may
934 * contain several compressed frames.
935 *
936 * AVPacket is one of the few structs in Libav, whose size is a part of public
937 * ABI. Thus it may be allocated on stack and no new fields can be added to it
938 * without libavcodec and libavformat major bump.
939 *
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940 * The semantics of data ownership depends on the buf or destruct (deprecated)
941 * fields. If either is set, the packet data is dynamically allocated and is
942 * valid indefinitely until av_free_packet() is called (which in turn calls
943 * av_buffer_unref()/the destruct callback to free the data). If neither is set,
944 * the packet data is typically backed by some static buffer somewhere and is
945 * only valid for a limited time (e.g. until the next read call when demuxing).
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946 *
947 * The side data is always allocated with av_malloc() and is freed in
948 * av_free_packet().
949 */
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950typedef struct AVPacket {
951 /**
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952 * A reference to the reference-counted buffer where the packet data is
953 * stored.
954 * May be NULL, then the packet data is not reference-counted.
955 */
956 AVBufferRef *buf;
957 /**
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958 * Presentation timestamp in AVStream->time_base units; the time at which
959 * the decompressed packet will be presented to the user.
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960 * Can be AV_NOPTS_VALUE if it is not stored in the file.
961 * pts MUST be larger or equal to dts as presentation cannot happen before
962 * decompression, unless one wants to view hex dumps. Some formats misuse
963 * the terms dts and pts/cts to mean something different. Such timestamps
964 * must be converted to true pts/dts before they are stored in AVPacket.
965 */
966 int64_t pts;
967 /**
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968 * Decompression timestamp in AVStream->time_base units; the time at which
969 * the packet is decompressed.
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970 * Can be AV_NOPTS_VALUE if it is not stored in the file.
971 */
972 int64_t dts;
973 uint8_t *data;
974 int size;
975 int stream_index;
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976 /**
977 * A combination of AV_PKT_FLAG values
978 */
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979 int flags;
980 /**
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981 * Additional packet data that can be provided by the container.
982 * Packet can contain several types of side information.
983 */
0e2c3ee9 984 AVPacketSideData *side_data;
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985 int side_data_elems;
986
987 /**
7b356d39 988 * Duration of this packet in AVStream->time_base units, 0 if unknown.
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989 * Equals next_pts - this_pts in presentation order.
990 */
991 int duration;
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992#if FF_API_DESTRUCT_PACKET
993 attribute_deprecated
18c915ee 994 void (*destruct)(struct AVPacket *);
1afddbe5 995 attribute_deprecated
18c915ee 996 void *priv;
1afddbe5 997#endif
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998 int64_t pos; ///< byte position in stream, -1 if unknown
999
1000 /**
7b356d39 1001 * Time difference in AVStream->time_base units from the pts of this
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1002 * packet to the point at which the output from the decoder has converged
1003 * independent from the availability of previous frames. That is, the
1004 * frames are virtually identical no matter if decoding started from
1005 * the very first frame or from this keyframe.
1006 * Is AV_NOPTS_VALUE if unknown.
1007 * This field is not the display duration of the current packet.
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1008 * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
1009 * set.
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1010 *
1011 * The purpose of this field is to allow seeking in streams that have no
1012 * keyframes in the conventional sense. It corresponds to the
1013 * recovery point SEI in H.264 and match_time_delta in NUT. It is also
1014 * essential for some types of subtitle streams to ensure that all
1015 * subtitles are correctly displayed after seeking.
1016 */
1017 int64_t convergence_duration;
1018} AVPacket;
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1019#define AV_PKT_FLAG_KEY 0x0001 ///< The packet contains a keyframe
1020#define AV_PKT_FLAG_CORRUPT 0x0002 ///< The packet content is corrupted
18c915ee 1021
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1022enum AVSideDataParamChangeFlags {
1023 AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT = 0x0001,
1024 AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT = 0x0002,
1025 AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE = 0x0004,
1026 AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS = 0x0008,
1027};
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1028/**
1029 * @}
1030 */
fe75dc85 1031
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1032struct AVCodecInternal;
1033
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1034enum AVFieldOrder {
1035 AV_FIELD_UNKNOWN,
1036 AV_FIELD_PROGRESSIVE,
1037 AV_FIELD_TT, //< Top coded_first, top displayed first
1038 AV_FIELD_BB, //< Bottom coded first, bottom displayed first
1039 AV_FIELD_TB, //< Top coded first, bottom displayed first
1040 AV_FIELD_BT, //< Bottom coded first, top displayed first
1041};
1042
d33c949c 1043/**
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1044 * main external API structure.
1045 * New fields can be added to the end with minor version bumps.
8bfb108b 1046 * Removal, reordering and changes to existing fields require a major
252f17e2 1047 * version bump.
8bfb108b 1048 * sizeof(AVCodecContext) must not be used outside libav*.
d33c949c 1049 */
de6d9b64 1050typedef struct AVCodecContext {
b71901e6 1051 /**
f5bccd85 1052 * information on struct for av_log
488eec10 1053 * - set by avcodec_alloc_context3
bc874dae 1054 */
d42a814e 1055 const AVClass *av_class;
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1056 int log_level_offset;
1057
1058 enum AVMediaType codec_type; /* see AVMEDIA_TYPE_xxx */
0a0f19b5 1059 const struct AVCodec *codec;
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1060#if FF_API_CODEC_NAME
1061 /**
1062 * @deprecated this field is not used for anything in libavcodec
1063 */
1064 attribute_deprecated
b1edfce0 1065 char codec_name[32];
ba71c740 1066#endif
36ef5369 1067 enum AVCodecID codec_id; /* see AV_CODEC_ID_xxx */
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1068
1069 /**
1070 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1071 * This is used to work around some encoder bugs.
1072 * A demuxer should set this to what is stored in the field used to identify the codec.
1073 * If there are multiple such fields in a container then the demuxer should choose the one
1074 * which maximizes the information about the used codec.
1075 * If the codec tag field in a container is larger than 32 bits then the demuxer should
1076 * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
1077 * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
1078 * first.
1079 * - encoding: Set by user, if not then the default based on codec_id will be used.
1080 * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1081 */
1082 unsigned int codec_tag;
1083
1084 /**
1085 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1086 * This is used to work around some encoder bugs.
1087 * - encoding: unused
1088 * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1089 */
1090 unsigned int stream_codec_tag;
1091
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1092 void *priv_data;
1093
1094 /**
1095 * Private context used for internal data.
1096 *
1097 * Unlike priv_data, this is not codec-specific. It is used in general
1098 * libavcodec functions.
1099 */
1100 struct AVCodecInternal *internal;
1101
1102 /**
1103 * Private data of the user, can be used to carry app specific stuff.
1104 * - encoding: Set by user.
1105 * - decoding: Set by user.
1106 */
1107 void *opaque;
1108
bc874dae 1109 /**
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1110 * the average bitrate
1111 * - encoding: Set by user; unused for constant quantizer encoding.
1112 * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.
b71901e6 1113 */
de6d9b64 1114 int bit_rate;
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1115
1116 /**
64863965 1117 * number of bits the bitstream is allowed to diverge from the reference.
b71901e6 1118 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
f5bccd85 1119 * - encoding: Set by user; unused for constant quantizer encoding.
64863965 1120 * - decoding: unused
b71901e6 1121 */
115329f1 1122 int bit_rate_tolerance;
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1123
1124 /**
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1125 * Global quality for codecs which cannot change it per frame.
1126 * This should be proportional to MPEG-1/2/4 qscale.
f5bccd85 1127 * - encoding: Set by user.
b1edfce0 1128 * - decoding: unused
b71901e6 1129 */
b1edfce0 1130 int global_quality;
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1131
1132 /**
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1133 * - encoding: Set by user.
1134 * - decoding: unused
b71901e6 1135 */
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1136 int compression_level;
1137#define FF_COMPRESSION_DEFAULT -1
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1138
1139 /**
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1140 * CODEC_FLAG_*.
1141 * - encoding: Set by user.
1142 * - decoding: Set by user.
b71901e6 1143 */
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1144 int flags;
1145
1146 /**
1147 * CODEC_FLAG2_*
1148 * - encoding: Set by user.
1149 * - decoding: Set by user.
1150 */
1151 int flags2;
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1152
1153 /**
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1154 * some codecs need / can use extradata like Huffman tables.
1155 * mjpeg: Huffman tables
b71901e6 1156 * rv10: additional flags
b704e742 1157 * mpeg4: global headers (they can be in the bitstream or here)
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DB
1158 * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
1159 * than extradata_size to avoid prolems if it is read with the bitstream reader.
1160 * The bytewise contents of extradata must not depend on the architecture or CPU endianness.
1161 * - encoding: Set/allocated/freed by libavcodec.
1162 * - decoding: Set/allocated/freed by user.
b71901e6 1163 */
58f2a4b0 1164 uint8_t *extradata;
e84c31dc 1165 int extradata_size;
115329f1 1166
b71901e6 1167 /**
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1168 * This is the fundamental unit of time (in seconds) in terms
1169 * of which frame timestamps are represented. For fixed-fps content,
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1170 * timebase should be 1/framerate and timestamp increments should be
1171 * identically 1.
f5bccd85 1172 * - encoding: MUST be set by user.
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1173 * - decoding: the use of this field for decoding is deprecated.
1174 * Use framerate instead.
b71901e6 1175 */
c0df9d75 1176 AVRational time_base;
115329f1 1177
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1178 /**
1179 * For some codecs, the time base is closer to the field rate than the frame rate.
1180 * Most notably, H.264 and MPEG-2 specify time_base as half of frame duration
1181 * if no telecine is used ...
1182 *
1183 * Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2.
1184 */
1185 int ticks_per_frame;
1186
1187 /**
c68317eb 1188 * Codec delay.
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1189 *
1190 * Video:
1191 * Number of frames the decoded output will be delayed relative to the
1192 * encoded input.
1193 *
1194 * Audio:
2df0c32e 1195 * For encoding, this field is unused (see initial_padding).
b19a5e51 1196 *
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1197 * For decoding, this is the number of samples the decoder needs to
1198 * output before the decoder's output is valid. When seeking, you should
1199 * start decoding this many samples prior to your desired seek point.
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1200 *
1201 * - encoding: Set by libavcodec.
e4aa3831 1202 * - decoding: Set by libavcodec.
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1203 */
1204 int delay;
1205
1206
5b28c8c3 1207 /* video only */
14bea432 1208 /**
21adafec 1209 * picture width / height.
115329f1 1210 * - encoding: MUST be set by user.
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1211 * - decoding: May be set by the user before opening the decoder if known e.g.
1212 * from the container. Some decoders will require the dimensions
1213 * to be set by the caller. During decoding, the decoder may
1214 * overwrite those values as required.
b71901e6 1215 */
de6d9b64 1216 int width, height;
115329f1 1217
b1edfce0 1218 /**
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1219 * Bitstream width / height, may be different from width/height e.g. when
1220 * the decoded frame is cropped before being output.
b1edfce0 1221 * - encoding: unused
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1222 * - decoding: May be set by the user before opening the decoder if known
1223 * e.g. from the container. During decoding, the decoder may
1224 * overwrite those values as required.
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1225 */
1226 int coded_width, coded_height;
1227
28240a60 1228#if FF_API_ASPECT_EXTENDED
e769f053 1229#define FF_ASPECT_EXTENDED 15
28240a60 1230#endif
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1231
1232 /**
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1233 * the number of pictures in a group of pictures, or 0 for intra_only
1234 * - encoding: Set by user.
64863965 1235 * - decoding: unused
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1236 */
1237 int gop_size;
1238
1239 /**
716d413c 1240 * Pixel format, see AV_PIX_FMT_xxx.
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1241 * May be set by the demuxer if known from headers.
1242 * May be overriden by the decoder if it knows better.
f5bccd85 1243 * - encoding: Set by user.
c1bdc930 1244 * - decoding: Set by user if known, overridden by libavcodec if known
b71901e6 1245 */
716d413c 1246 enum AVPixelFormat pix_fmt;
115329f1 1247
b71901e6 1248 /**
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1249 * Motion estimation algorithm used for video coding.
1250 * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
a0c5917f 1251 * 8 (umh), 10 (tesa) [7, 8, 10 are x264 specific]
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1252 * - encoding: MUST be set by user.
1253 * - decoding: unused
1254 */
1255 int me_method;
1256
1257 /**
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1258 * If non NULL, 'draw_horiz_band' is called by the libavcodec
1259 * decoder to draw a horizontal band. It improves cache usage. Not
b71901e6 1260 * all codecs can do that. You must check the codec capabilities
f5bccd85 1261 * beforehand.
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AS
1262 * When multithreading is used, it may be called from multiple threads
1263 * at the same time; threads might draw different parts of the same AVFrame,
1264 * or multiple AVFrames, and there is no guarantee that slices will be drawn
1265 * in order.
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1266 * The function is also used by hardware acceleration APIs.
1267 * It is called at least once during frame decoding to pass
1268 * the data needed for hardware render.
1269 * In that mode instead of pixel data, AVFrame points to
1270 * a structure specific to the acceleration API. The application
1271 * reads the structure and can change some fields to indicate progress
1272 * or mark state.
64863965 1273 * - encoding: unused
f5bccd85 1274 * - decoding: Set by user.
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1275 * @param height the height of the slice
1276 * @param y the y position of the slice
1277 * @param type 1->top field, 2->bottom field, 3->frame
1278 * @param offset offset into the AVFrame.data from which the slice should be read
b71901e6 1279 */
bf89e6b1 1280 void (*draw_horiz_band)(struct AVCodecContext *s,
560f773c 1281 const AVFrame *src, int offset[AV_NUM_DATA_POINTERS],
3bb07d61 1282 int y, int type, int height);
bf89e6b1 1283
a3a5f4d6 1284 /**
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1285 * callback to negotiate the pixelFormat
1286 * @param fmt is the list of formats which are supported by the codec,
1287 * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
1288 * The first is always the native one.
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RDC
1289 * @note The callback may be called again immediately if initialization for
1290 * the selected (hardware-accelerated) pixel format failed.
1291 * @warning Behavior is undefined if the callback returns a value not
1292 * in the fmt list of formats.
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1293 * @return the chosen format
1294 * - encoding: unused
1295 * - decoding: Set by user, if not set the native format will be chosen.
a3a5f4d6 1296 */
716d413c 1297 enum AVPixelFormat (*get_format)(struct AVCodecContext *s, const enum AVPixelFormat * fmt);
de6d9b64 1298
718b27a7 1299 /**
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1300 * maximum number of B-frames between non-B-frames
1301 * Note: The output will be delayed by max_b_frames+1 relative to the input.
1302 * - encoding: Set by user.
1303 * - decoding: unused
718b27a7 1304 */
b1edfce0 1305 int max_b_frames;
115329f1 1306
b71901e6 1307 /**
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1308 * qscale factor between IP and B-frames
1309 * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
1310 * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1311 * - encoding: Set by user.
64863965 1312 * - decoding: unused
b71901e6 1313 */
b1edfce0 1314 float b_quant_factor;
115329f1 1315
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1316 /** obsolete FIXME remove */
1317 int rc_strategy;
1318#define FF_RC_STRATEGY_XVID 1
1319
1320 int b_frame_strategy;
115329f1 1321
b71901e6 1322 /**
b1edfce0 1323 * qscale offset between IP and B-frames
f5bccd85 1324 * - encoding: Set by user.
64863965 1325 * - decoding: unused
b71901e6 1326 */
b1edfce0 1327 float b_quant_offset;
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1328
1329 /**
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1330 * Size of the frame reordering buffer in the decoder.
1331 * For MPEG-2 it is 1 IPB or 0 low delay IP.
1332 * - encoding: Set by libavcodec.
1333 * - decoding: Set by libavcodec.
1334 */
1335 int has_b_frames;
1336
1337 /**
1338 * 0-> h263 quant 1-> mpeg quant
f5bccd85 1339 * - encoding: Set by user.
64863965 1340 * - decoding: unused
b71901e6 1341 */
b1edfce0 1342 int mpeg_quant;
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1343
1344 /**
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1345 * qscale factor between P and I-frames
1346 * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
662e5411 1347 * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
f5bccd85 1348 * - encoding: Set by user.
64863965 1349 * - decoding: unused
b71901e6 1350 */
b1edfce0 1351 float i_quant_factor;
64b7c5b6 1352
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1353 /**
1354 * qscale offset between P and I-frames
1355 * - encoding: Set by user.
1356 * - decoding: unused
1357 */
1358 float i_quant_offset;
9dbcbd92 1359
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1360 /**
1361 * luminance masking (0-> disabled)
1362 * - encoding: Set by user.
1363 * - decoding: unused
1364 */
1365 float lumi_masking;
115329f1 1366
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1367 /**
1368 * temporary complexity masking (0-> disabled)
1369 * - encoding: Set by user.
1370 * - decoding: unused
1371 */
1372 float temporal_cplx_masking;
de6d9b64 1373
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1374 /**
1375 * spatial complexity masking (0-> disabled)
1376 * - encoding: Set by user.
1377 * - decoding: unused
1378 */
1379 float spatial_cplx_masking;
115329f1 1380
b71901e6 1381 /**
b1edfce0 1382 * p block masking (0-> disabled)
f5bccd85 1383 * - encoding: Set by user.
64863965 1384 * - decoding: unused
b71901e6 1385 */
b1edfce0 1386 float p_masking;
115329f1 1387
b71901e6 1388 /**
b1edfce0 1389 * darkness masking (0-> disabled)
f5bccd85 1390 * - encoding: Set by user.
64863965 1391 * - decoding: unused
b71901e6 1392 */
b1edfce0 1393 float dark_masking;
115329f1 1394
b71901e6 1395 /**
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1396 * slice count
1397 * - encoding: Set by libavcodec.
1398 * - decoding: Set by user (or 0).
b71901e6 1399 */
b1edfce0 1400 int slice_count;
b71901e6 1401 /**
b1edfce0 1402 * prediction method (needed for huffyuv)
f5bccd85 1403 * - encoding: Set by user.
64863965 1404 * - decoding: unused
b71901e6 1405 */
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1406 int prediction_method;
1407#define FF_PRED_LEFT 0
1408#define FF_PRED_PLANE 1
1409#define FF_PRED_MEDIAN 2
115329f1 1410
b71901e6 1411 /**
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1412 * slice offsets in the frame in bytes
1413 * - encoding: Set/allocated by libavcodec.
1414 * - decoding: Set/allocated by user (or NULL).
b71901e6 1415 */
b1edfce0 1416 int *slice_offset;
0fd90455 1417
b71901e6 1418 /**
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1419 * sample aspect ratio (0 if unknown)
1420 * That is the width of a pixel divided by the height of the pixel.
1421 * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
1422 * - encoding: Set by user.
f5bccd85 1423 * - decoding: Set by libavcodec.
b71901e6 1424 */
b1edfce0 1425 AVRational sample_aspect_ratio;
115329f1 1426
b71901e6 1427 /**
b1edfce0 1428 * motion estimation comparison function
f5bccd85 1429 * - encoding: Set by user.
64863965 1430 * - decoding: unused
b71901e6 1431 */
b1edfce0 1432 int me_cmp;
b71901e6 1433 /**
b1edfce0 1434 * subpixel motion estimation comparison function
f5bccd85 1435 * - encoding: Set by user.
64863965 1436 * - decoding: unused
b71901e6 1437 */
b1edfce0 1438 int me_sub_cmp;
b71901e6 1439 /**
b1edfce0 1440 * macroblock comparison function (not supported yet)
f5bccd85 1441 * - encoding: Set by user.
64863965 1442 * - decoding: unused
b71901e6 1443 */
b1edfce0 1444 int mb_cmp;
b71901e6 1445 /**
b1edfce0 1446 * interlaced DCT comparison function
f5bccd85 1447 * - encoding: Set by user.
64863965 1448 * - decoding: unused
b71901e6 1449 */
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1450 int ildct_cmp;
1451#define FF_CMP_SAD 0
1452#define FF_CMP_SSE 1
1453#define FF_CMP_SATD 2
1454#define FF_CMP_DCT 3
1455#define FF_CMP_PSNR 4
1456#define FF_CMP_BIT 5
1457#define FF_CMP_RD 6
1458#define FF_CMP_ZERO 7
1459#define FF_CMP_VSAD 8
1460#define FF_CMP_VSSE 9
1461#define FF_CMP_NSSE 10
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1462#define FF_CMP_DCTMAX 13
1463#define FF_CMP_DCT264 14
1464#define FF_CMP_CHROMA 256
115329f1 1465
b71901e6 1466 /**
b1edfce0 1467 * ME diamond size & shape
f5bccd85 1468 * - encoding: Set by user.
64863965 1469 * - decoding: unused
b71901e6 1470 */
b1edfce0 1471 int dia_size;
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MN
1472
1473 /**
b1edfce0 1474 * amount of previous MV predictors (2a+1 x 2a+1 square)
f5bccd85 1475 * - encoding: Set by user.
64863965 1476 * - decoding: unused
b71901e6 1477 */
b1edfce0 1478 int last_predictor_count;
115329f1 1479
b71901e6 1480 /**
b1edfce0 1481 * prepass for motion estimation
f5bccd85 1482 * - encoding: Set by user.
64863965 1483 * - decoding: unused
b71901e6 1484 */
b1edfce0 1485 int pre_me;
115329f1 1486
b71901e6 1487 /**
b1edfce0 1488 * motion estimation prepass comparison function
f5bccd85 1489 * - encoding: Set by user.
64863965 1490 * - decoding: unused
b71901e6 1491 */
b1edfce0 1492 int me_pre_cmp;
917e06c8 1493
b71901e6 1494 /**
b1edfce0 1495 * ME prepass diamond size & shape
f5bccd85 1496 * - encoding: Set by user.
64863965 1497 * - decoding: unused
b71901e6 1498 */
b1edfce0 1499 int pre_dia_size;
115329f1 1500
c5d309f2 1501 /**
b1edfce0 1502 * subpel ME quality
f5bccd85 1503 * - encoding: Set by user.
64863965 1504 * - decoding: unused
c5d309f2 1505 */
b1edfce0 1506 int me_subpel_quality;
115329f1 1507
1ef9e837 1508#if FF_API_AFD
c5d309f2 1509 /**
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1510 * DTG active format information (additional aspect ratio
1511 * information only used in DVB MPEG-2 transport streams)
1512 * 0 if not set.
1513 *
1514 * - encoding: unused
1515 * - decoding: Set by decoder.
1ef9e837 1516 * @deprecated Deprecated in favor of AVSideData
c5d309f2 1517 */
1ef9e837 1518 attribute_deprecated int dtg_active_format;
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1519#define FF_DTG_AFD_SAME 8
1520#define FF_DTG_AFD_4_3 9
1521#define FF_DTG_AFD_16_9 10
1522#define FF_DTG_AFD_14_9 11
1523#define FF_DTG_AFD_4_3_SP_14_9 13
1524#define FF_DTG_AFD_16_9_SP_14_9 14
1525#define FF_DTG_AFD_SP_4_3 15
1ef9e837 1526#endif /* FF_API_AFD */
115329f1 1527
c5d309f2 1528 /**
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1529 * maximum motion estimation search range in subpel units
1530 * If 0 then no limit.
1531 *
f5bccd85 1532 * - encoding: Set by user.
64863965 1533 * - decoding: unused
c5d309f2 1534 */
b1edfce0 1535 int me_range;
115329f1 1536
c5d309f2 1537 /**
b1edfce0 1538 * intra quantizer bias
f5bccd85 1539 * - encoding: Set by user.
64863965 1540 * - decoding: unused
c5d309f2 1541 */
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1542 int intra_quant_bias;
1543#define FF_DEFAULT_QUANT_BIAS 999999
15415af4 1544
5e746b99 1545 /**
b1edfce0 1546 * inter quantizer bias
f5bccd85 1547 * - encoding: Set by user.
64863965 1548 * - decoding: unused
5e746b99 1549 */
b1edfce0 1550 int inter_quant_bias;
115329f1 1551
144f0625 1552 /**
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1553 * slice flags
1554 * - encoding: unused
1555 * - decoding: Set by user.
144f0625 1556 */
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1557 int slice_flags;
1558#define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1559#define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1560#define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1561
19e30a58 1562#if FF_API_XVMC
144f0625 1563 /**
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1564 * XVideo Motion Acceleration
1565 * - encoding: forbidden
1566 * - decoding: set by decoder
19e30a58 1567 * @deprecated XvMC support is slated for removal.
144f0625 1568 */
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DB
1569 attribute_deprecated int xvmc_acceleration;
1570#endif /* FF_API_XVMC */
144f0625 1571
4d2858de 1572 /**
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1573 * macroblock decision mode
1574 * - encoding: Set by user.
1575 * - decoding: unused
4d2858de 1576 */
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1577 int mb_decision;
1578#define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1579#define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1580#define FF_MB_DECISION_RD 2 ///< rate distortion
4d2858de 1581
6b72ac63 1582 /**
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1583 * custom intra quantization matrix
1584 * - encoding: Set by user, can be NULL.
1585 * - decoding: Set by libavcodec.
bec89a84 1586 */
b1edfce0 1587 uint16_t *intra_matrix;
7160bb71 1588
11f18faf 1589 /**
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1590 * custom inter quantization matrix
1591 * - encoding: Set by user, can be NULL.
1592 * - decoding: Set by libavcodec.
11f18faf 1593 */
b1edfce0 1594 uint16_t *inter_matrix;
115329f1 1595
11f18faf 1596 /**
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1597 * scene change detection threshold
1598 * 0 is default, larger means fewer detected scene changes.
f5bccd85 1599 * - encoding: Set by user.
64863965 1600 * - decoding: unused
11f18faf 1601 */
b1edfce0 1602 int scenechange_threshold;
115329f1 1603
5d3cea3a 1604 /**
b1edfce0 1605 * noise reduction strength
f5bccd85 1606 * - encoding: Set by user.
b1edfce0 1607 * - decoding: unused
5d3cea3a 1608 */
b1edfce0 1609 int noise_reduction;
1e491e29 1610
59b55c49 1611#if FF_API_MPV_OPT
140cb663 1612 /**
59b55c49 1613 * @deprecated this field is unused
0c9bbaec 1614 */
59b55c49 1615 attribute_deprecated
b1edfce0 1616 int me_threshold;
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1617
1618 /**
c4f7bee0 1619 * @deprecated this field is unused
140cb663 1620 */
c4f7bee0 1621 attribute_deprecated
b1edfce0 1622 int mb_threshold;
c4f7bee0 1623#endif
115329f1 1624
1457ab52 1625 /**
b1edfce0 1626 * precision of the intra DC coefficient - 8
f5bccd85 1627 * - encoding: Set by user.
64863965 1628 * - decoding: unused
1457ab52 1629 */
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1630 int intra_dc_precision;
1631
1457ab52 1632 /**
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1633 * Number of macroblock rows at the top which are skipped.
1634 * - encoding: unused
1635 * - decoding: Set by user.
1457ab52 1636 */
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1637 int skip_top;
1638
1457ab52 1639 /**
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1640 * Number of macroblock rows at the bottom which are skipped.
1641 * - encoding: unused
1642 * - decoding: Set by user.
1457ab52 1643 */
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1644 int skip_bottom;
1645
15ec053c 1646#if FF_API_MPV_OPT
622348f9 1647 /**
15ec053c 1648 * @deprecated use encoder private options instead
622348f9 1649 */
15ec053c 1650 attribute_deprecated
b1edfce0 1651 float border_masking;
15ec053c 1652#endif
115329f1 1653
1457ab52 1654 /**
b1edfce0 1655 * minimum MB lagrange multipler
f5bccd85 1656 * - encoding: Set by user.
64863965 1657 * - decoding: unused
1457ab52 1658 */
b1edfce0 1659 int mb_lmin;
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1660
1661 /**
b1edfce0 1662 * maximum MB lagrange multipler
f5bccd85 1663 * - encoding: Set by user.
64863965 1664 * - decoding: unused
b07a5980 1665 */
b1edfce0 1666 int mb_lmax;
70ac76c0 1667
f5fb6b34 1668 /**
b1edfce0 1669 *
f5bccd85 1670 * - encoding: Set by user.
64863965 1671 * - decoding: unused
f5fb6b34 1672 */
b1edfce0 1673 int me_penalty_compensation;
b07a5980 1674
70ac76c0 1675 /**
b1edfce0 1676 *
f5bccd85 1677 * - encoding: Set by user.
64863965 1678 * - decoding: unused
70ac76c0 1679 */
b1edfce0 1680 int bidir_refine;
826f429a 1681
70ac76c0 1682 /**
b1edfce0 1683 *
f5bccd85 1684 * - encoding: Set by user.
64863965 1685 * - decoding: unused
70ac76c0 1686 */
b1edfce0 1687 int brd_scale;
70ac76c0 1688
826f429a 1689 /**
b1edfce0 1690 * minimum GOP size
f5bccd85 1691 * - encoding: Set by user.
64863965 1692 * - decoding: unused
826f429a 1693 */
b1edfce0 1694 int keyint_min;
826f429a 1695
a33c7159 1696 /**
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1697 * number of reference frames
1698 * - encoding: Set by user.
1699 * - decoding: Set by lavc.
a33c7159 1700 */
b1edfce0 1701 int refs;
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1702
1703 /**
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1704 * chroma qp offset from luma
1705 * - encoding: Set by user.
1706 * - decoding: unused
e2f9490e 1707 */
b1edfce0 1708 int chromaoffset;
e2f9490e 1709
9f17685d 1710#if FF_API_UNUSED_MEMBERS
ebbcdc9a 1711 /**
b1edfce0 1712 * Multiplied by qscale for each frame and added to scene_change_score.
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1713 * - encoding: Set by user.
1714 * - decoding: unused
ebbcdc9a 1715 */
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1716 attribute_deprecated int scenechange_factor;
1717#endif
ebbcdc9a 1718
65f7062d 1719 /**
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1720 *
1721 * Note: Value depends upon the compare function used for fullpel ME.
f5bccd85 1722 * - encoding: Set by user.
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1723 * - decoding: unused
1724 */
b1edfce0 1725 int mv0_threshold;
115329f1 1726
1984f635 1727 /**
b1edfce0 1728 * Adjust sensitivity of b_frame_strategy 1.
f5bccd85 1729 * - encoding: Set by user.
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1730 * - decoding: unused
1731 */
b1edfce0 1732 int b_sensitivity;
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1733
1734 /**
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1735 * Chromaticity coordinates of the source primaries.
1736 * - encoding: Set by user
1737 * - decoding: Set by libavcodec
5cd62665 1738 */
b1edfce0 1739 enum AVColorPrimaries color_primaries;
115329f1 1740
3d2e8cce 1741 /**
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1742 * Color Transfer Characteristic.
1743 * - encoding: Set by user
1744 * - decoding: Set by libavcodec
3d2e8cce 1745 */
b1edfce0 1746 enum AVColorTransferCharacteristic color_trc;
115329f1 1747
11e659c2 1748 /**
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1749 * YUV colorspace type.
1750 * - encoding: Set by user
1751 * - decoding: Set by libavcodec
1752 */
1753 enum AVColorSpace colorspace;
1754
1755 /**
1756 * MPEG vs JPEG YUV range.
1757 * - encoding: Set by user
1758 * - decoding: Set by libavcodec
1759 */
1760 enum AVColorRange color_range;
1761
1762 /**
1763 * This defines the location of chroma samples.
1764 * - encoding: Set by user
1765 * - decoding: Set by libavcodec
1766 */
1767 enum AVChromaLocation chroma_sample_location;
1768
1769 /**
1770 * Number of slices.
1771 * Indicates number of picture subdivisions. Used for parallelized
1772 * decoding.
1773 * - encoding: Set by user
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1774 * - decoding: unused
1775 */
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1776 int slices;
1777
1778 /** Field order
1779 * - encoding: set by libavcodec
1780 * - decoding: Set by libavcodec
1781 */
1782 enum AVFieldOrder field_order;
1783
1784 /* audio only */
1785 int sample_rate; ///< samples per second
1786 int channels; ///< number of audio channels
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1787
1788 /**
b1edfce0 1789 * audio sample format
f5bccd85 1790 * - encoding: Set by user.
b1edfce0 1791 * - decoding: Set by libavcodec.
11e659c2 1792 */
b1edfce0 1793 enum AVSampleFormat sample_fmt; ///< sample format
115329f1 1794
b1edfce0 1795 /* The following data should not be initialized. */
3bb07d61 1796 /**
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1797 * Number of samples per channel in an audio frame.
1798 *
1799 * - encoding: set by libavcodec in avcodec_open2(). Each submitted frame
1800 * except the last must contain exactly frame_size samples per channel.
1801 * May be 0 when the codec has CODEC_CAP_VARIABLE_FRAME_SIZE set, then the
1802 * frame size is not restricted.
1803 * - decoding: may be set by some decoders to indicate constant frame size
3bb07d61 1804 */
b1edfce0 1805 int frame_size;
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1806
1807 /**
1808 * Frame counter, set by libavcodec.
1809 *
1810 * - decoding: total number of frames returned from the decoder so far.
1811 * - encoding: total number of frames passed to the encoder so far.
1812 *
1813 * @note the counter is not incremented if encoding/decoding resulted in
1814 * an error.
1815 */
1816 int frame_number;
3bb07d61 1817
fb364ada 1818 /**
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1819 * number of bytes per packet if constant and known or 0
1820 * Used by some WAV based audio codecs.
fb364ada 1821 */
b1edfce0 1822 int block_align;
115329f1 1823
7d1c3fc1 1824 /**
b1edfce0 1825 * Audio cutoff bandwidth (0 means "automatic")
f5bccd85 1826 * - encoding: Set by user.
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1827 * - decoding: unused
1828 */
b1edfce0 1829 int cutoff;
d6eb3c50 1830
b1edfce0 1831#if FF_API_REQUEST_CHANNELS
d6eb3c50 1832 /**
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1833 * Decoder should decode to this many channels if it can (0 for default)
1834 * - encoding: unused
1835 * - decoding: Set by user.
1836 * @deprecated Deprecated in favor of request_channel_layout.
d6eb3c50 1837 */
bf4b0ed1 1838 attribute_deprecated int request_channels;
b1edfce0 1839#endif
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1840
1841 /**
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1842 * Audio channel layout.
1843 * - encoding: set by user.
1844 * - decoding: set by libavcodec.
d6eb3c50 1845 */
b1edfce0 1846 uint64_t channel_layout;
115329f1 1847
541ae140 1848 /**
b1edfce0 1849 * Request decoder to use this channel layout if it can (0 for default)
541ae140 1850 * - encoding: unused
b1edfce0 1851 * - decoding: Set by user.
541ae140 1852 */
b1edfce0 1853 uint64_t request_channel_layout;
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1854
1855 /**
b1edfce0 1856 * Type of service that the audio stream conveys.
f5bccd85 1857 * - encoding: Set by user.
b1edfce0 1858 * - decoding: Set by libavcodec.
05fbd0a2 1859 */
b1edfce0 1860 enum AVAudioServiceType audio_service_type;
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1861
1862 /**
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1863 * Used to request a sample format from the decoder.
1864 * - encoding: unused.
1865 * - decoding: Set by user.
158c7f05 1866 */
b1edfce0 1867 enum AVSampleFormat request_sample_fmt;
158c7f05 1868
759001c5 1869#if FF_API_GET_BUFFER
158c7f05 1870 /**
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1871 * Called at the beginning of each frame to get a buffer for it.
1872 *
1873 * The function will set AVFrame.data[], AVFrame.linesize[].
1874 * AVFrame.extended_data[] must also be set, but it should be the same as
1875 * AVFrame.data[] except for planar audio with more channels than can fit
1876 * in AVFrame.data[]. In that case, AVFrame.data[] shall still contain as
1877 * many data pointers as it can hold.
1878 *
1879 * if CODEC_CAP_DR1 is not set then get_buffer() must call
1880 * avcodec_default_get_buffer() instead of providing buffers allocated by
1881 * some other means.
1882 *
1883 * AVFrame.data[] should be 32- or 16-byte-aligned unless the CPU doesn't
1884 * need it. avcodec_default_get_buffer() aligns the output buffer properly,
1885 * but if get_buffer() is overridden then alignment considerations should
1886 * be taken into account.
1887 *
1888 * @see avcodec_default_get_buffer()
1889 *
1890 * Video:
1891 *
1892 * If pic.reference is set then the frame will be read later by libavcodec.
1893 * avcodec_align_dimensions2() should be used to find the required width and
1894 * height, as they normally need to be rounded up to the next multiple of 16.
1895 *
1896 * If frame multithreading is used and thread_safe_callbacks is set,
1897 * it may be called from a different thread, but not from more than one at
1898 * once. Does not need to be reentrant.
1899 *
1900 * @see release_buffer(), reget_buffer()
1901 * @see avcodec_align_dimensions2()
1902 *
1903 * Audio:
1904 *
1905 * Decoders request a buffer of a particular size by setting
1906 * AVFrame.nb_samples prior to calling get_buffer(). The decoder may,
1907 * however, utilize only part of the buffer by setting AVFrame.nb_samples
1908 * to a smaller value in the output frame.
1909 *
1910 * Decoders cannot use the buffer after returning from
1911 * avcodec_decode_audio4(), so they will not call release_buffer(), as it
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1912 * is assumed to be released immediately upon return. In some rare cases,
1913 * a decoder may need to call get_buffer() more than once in a single
1914 * call to avcodec_decode_audio4(). In that case, when get_buffer() is
1915 * called again after it has already been called once, the previously
1916 * acquired buffer is assumed to be released at that time and may not be
1917 * reused by the decoder.
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1918 *
1919 * As a convenience, av_samples_get_buffer_size() and
1920 * av_samples_fill_arrays() in libavutil may be used by custom get_buffer()
1921 * functions to find the required data size and to fill data pointers and
1922 * linesize. In AVFrame.linesize, only linesize[0] may be set for audio
1923 * since all planes must be the same size.
1924 *
1925 * @see av_samples_get_buffer_size(), av_samples_fill_arrays()
1926 *
1927 * - encoding: unused
1928 * - decoding: Set by libavcodec, user can override.
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1929 *
1930 * @deprecated use get_buffer2()
158c7f05 1931 */
759001c5 1932 attribute_deprecated
b1edfce0 1933 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
2a2bbcb0 1934
821cb11f 1935 /**
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1936 * Called to release buffers which were allocated with get_buffer.
1937 * A released buffer can be reused in get_buffer().
1938 * pic.data[*] must be set to NULL.
1939 * May be called from a different thread if frame multithreading is used,
1940 * but not by more than one thread at once, so does not need to be reentrant.
1941 * - encoding: unused
1942 * - decoding: Set by libavcodec, user can override.
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1943 *
1944 * @deprecated custom freeing callbacks should be set from get_buffer2()
821cb11f 1945 */
759001c5 1946 attribute_deprecated
b1edfce0 1947 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
115329f1 1948
074c4ca7 1949 /**
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1950 * Called at the beginning of a frame to get cr buffer for it.
1951 * Buffer type (size, hints) must be the same. libavcodec won't check it.
1952 * libavcodec will pass previous buffer in pic, function should return
e1c2a5a0 1953 * same buffer or new buffer with old frame "painted" into it.
f5bccd85 1954 * If pic.data[0] == NULL must behave like get_buffer().
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1955 * if CODEC_CAP_DR1 is not set then reget_buffer() must call
1956 * avcodec_default_reget_buffer() instead of providing buffers allocated by
1957 * some other means.
074c4ca7 1958 * - encoding: unused
53128bc3 1959 * - decoding: Set by libavcodec, user can override.
074c4ca7 1960 */
759001c5 1961 attribute_deprecated
e1c2a5a0 1962 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
759001c5 1963#endif
ba58dabc 1964
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1965 /**
1966 * This callback is called at the beginning of each frame to get data
1967 * buffer(s) for it. There may be one contiguous buffer for all the data or
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1968 * there may be a buffer per each data plane or anything in between. What
1969 * this means is, you may set however many entries in buf[] you feel necessary.
1970 * Each buffer must be reference-counted using the AVBuffer API (see description
1971 * of buf[] below).
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1972 *
1973 * The following fields will be set in the frame before this callback is
1974 * called:
1975 * - format
1976 * - width, height (video only)
1977 * - sample_rate, channel_layout, nb_samples (audio only)
1978 * Their values may differ from the corresponding values in
1979 * AVCodecContext. This callback must use the frame values, not the codec
1980 * context values, to calculate the required buffer size.
1981 *
1982 * This callback must fill the following fields in the frame:
1983 * - data[]
1984 * - linesize[]
1985 * - extended_data:
1986 * * if the data is planar audio with more than 8 channels, then this
1987 * callback must allocate and fill extended_data to contain all pointers
1988 * to all data planes. data[] must hold as many pointers as it can.
1989 * extended_data must be allocated with av_malloc() and will be freed in
1990 * av_frame_unref().
1991 * * otherwise exended_data must point to data
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1992 * - buf[] must contain one or more pointers to AVBufferRef structures. Each of
1993 * the frame's data and extended_data pointers must be contained in these. That
1994 * is, one AVBufferRef for each allocated chunk of memory, not necessarily one
1995 * AVBufferRef per data[] entry. See: av_buffer_create(), av_buffer_alloc(),
1996 * and av_buffer_ref().
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1997 * - extended_buf and nb_extended_buf must be allocated with av_malloc() by
1998 * this callback and filled with the extra buffers if there are more
1999 * buffers than buf[] can hold. extended_buf will be freed in
2000 * av_frame_unref().
2001 *
2002 * If CODEC_CAP_DR1 is not set then get_buffer2() must call
2003 * avcodec_default_get_buffer2() instead of providing buffers allocated by
2004 * some other means.
2005 *
2006 * Each data plane must be aligned to the maximum required by the target
2007 * CPU.
2008 *
2009 * @see avcodec_default_get_buffer2()
2010 *
2011 * Video:
2012 *
2013 * If AV_GET_BUFFER_FLAG_REF is set in flags then the frame may be reused
2014 * (read and/or written to if it is writable) later by libavcodec.
2015 *
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2016 * avcodec_align_dimensions2() should be used to find the required width and
2017 * height, as they normally need to be rounded up to the next multiple of 16.
2018 *
2019 * If frame multithreading is used and thread_safe_callbacks is set,
2020 * this callback may be called from a different thread, but not from more
2021 * than one at once. Does not need to be reentrant.
2022 *
2023 * @see avcodec_align_dimensions2()
2024 *
2025 * Audio:
2026 *
2027 * Decoders request a buffer of a particular size by setting
2028 * AVFrame.nb_samples prior to calling get_buffer2(). The decoder may,
2029 * however, utilize only part of the buffer by setting AVFrame.nb_samples
2030 * to a smaller value in the output frame.
2031 *
2032 * As a convenience, av_samples_get_buffer_size() and
2033 * av_samples_fill_arrays() in libavutil may be used by custom get_buffer2()
2034 * functions to find the required data size and to fill data pointers and
2035 * linesize. In AVFrame.linesize, only linesize[0] may be set for audio
2036 * since all planes must be the same size.
2037 *
2038 * @see av_samples_get_buffer_size(), av_samples_fill_arrays()
2039 *
2040 * - encoding: unused
2041 * - decoding: Set by libavcodec, user can override.
2042 */
2043 int (*get_buffer2)(struct AVCodecContext *s, AVFrame *frame, int flags);
2044
2045 /**
2046 * If non-zero, the decoded audio and video frames returned from
2047 * avcodec_decode_video2() and avcodec_decode_audio4() are reference-counted
2048 * and are valid indefinitely. The caller must free them with
2049 * av_frame_unref() when they are not needed anymore.
2050 * Otherwise, the decoded frames must not be freed by the caller and are
2051 * only valid until the next decode call.
2052 *
2053 * - encoding: unused
2054 * - decoding: set by the caller before avcodec_open2().
2055 */
2056 int refcounted_frames;
ba58dabc 2057
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2058 /* - encoding parameters */
2059 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
2060 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
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2061
2062 /**
b1edfce0 2063 * minimum quantizer
f5bccd85 2064 * - encoding: Set by user.
b1edfce0 2065 * - decoding: unused
ba58dabc 2066 */
b1edfce0 2067 int qmin;
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2068
2069 /**
b1edfce0 2070 * maximum quantizer
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2071 * - encoding: Set by user.
2072 * - decoding: unused
7ebfc0ea 2073 */
b1edfce0 2074 int qmax;
115329f1 2075
77ea0d4b 2076 /**
b1edfce0 2077 * maximum quantizer difference between frames
f5bccd85 2078 * - encoding: Set by user.
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2079 * - decoding: unused
2080 */
b1edfce0 2081 int max_qdiff;
9c3d33d6 2082
a6e4ce9f 2083#if FF_API_MPV_OPT
9c3d33d6 2084 /**
a6e4ce9f 2085 * @deprecated use encoder private options instead
9c3d33d6 2086 */
a6e4ce9f 2087 attribute_deprecated
b1edfce0 2088 float rc_qsquish;
115329f1 2089
946f9535 2090 attribute_deprecated
b1edfce0 2091 float rc_qmod_amp;
946f9535 2092 attribute_deprecated
b1edfce0 2093 int rc_qmod_freq;
946f9535 2094#endif
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2095
2096 /**
b1edfce0 2097 * decoder bitstream buffer size
f5bccd85 2098 * - encoding: Set by user.
f20f8a8b 2099 * - decoding: unused
a4d36c11 2100 */
b1edfce0 2101 int rc_buffer_size;
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2102
2103 /**
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2104 * ratecontrol override, see RcOverride
2105 * - encoding: Allocated/set/freed by user.
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2106 * - decoding: unused
2107 */
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2108 int rc_override_count;
2109 RcOverride *rc_override;
bf266e19 2110
a75c2eb2 2111#if FF_API_MPV_OPT
bf266e19 2112 /**
a75c2eb2 2113 * @deprecated use encoder private options instead
bf266e19 2114 */
a75c2eb2 2115 attribute_deprecated
b1edfce0 2116 const char *rc_eq;
a75c2eb2 2117#endif
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2118
2119 /**
b1edfce0 2120 * maximum bitrate
f5bccd85 2121 * - encoding: Set by user.
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2122 * - decoding: unused
2123 */
b1edfce0 2124 int rc_max_rate;
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2125
2126 /**
b1edfce0 2127 * minimum bitrate
f5bccd85 2128 * - encoding: Set by user.
b1edfce0 2129 * - decoding: unused
baced9f5 2130 */
b1edfce0 2131 int rc_min_rate;
0215006a 2132
66a68ddd 2133#if FF_API_MPV_OPT
baced9f5 2134 /**
66a68ddd 2135 * @deprecated use encoder private options instead
178fcca8 2136 */
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2137 attribute_deprecated
2138 float rc_buffer_aggressivity;
2139
2140 attribute_deprecated
b1edfce0 2141 float rc_initial_cplx;
66a68ddd 2142#endif
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2143
2144 /**
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2145 * Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow.
2146 * - encoding: Set by user.
2147 * - decoding: unused.
21adafec 2148 */
b1edfce0 2149 float rc_max_available_vbv_use;
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2150
2151 /**
b1edfce0 2152 * Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow.
f5bccd85 2153 * - encoding: Set by user.
b1edfce0 2154 * - decoding: unused.
bbf18b21 2155 */
b1edfce0 2156 float rc_min_vbv_overflow_use;
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MN
2157
2158 /**
b1edfce0 2159 * Number of bits which should be loaded into the rc buffer before decoding starts.
f5bccd85 2160 * - encoding: Set by user.
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2161 * - decoding: unused
2162 */
b1edfce0 2163 int rc_initial_buffer_occupancy;
0fd6aea1 2164
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2165#define FF_CODER_TYPE_VLC 0
2166#define FF_CODER_TYPE_AC 1
2167#define FF_CODER_TYPE_RAW 2
2168#define FF_CODER_TYPE_RLE 3
9f17685d 2169#if FF_API_UNUSED_MEMBERS
b1edfce0 2170#define FF_CODER_TYPE_DEFLATE 4
9f17685d 2171#endif /* FF_API_UNUSED_MEMBERS */
0fd6aea1 2172 /**
b1edfce0 2173 * coder type
f5bccd85 2174 * - encoding: Set by user.
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2175 * - decoding: unused
2176 */
b1edfce0 2177 int coder_type;
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MN
2178
2179 /**
b1edfce0 2180 * context model
f5bccd85 2181 * - encoding: Set by user.
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2182 * - decoding: unused
2183 */
b1edfce0 2184 int context_model;
957c743a 2185
530c1441 2186#if FF_API_MPV_OPT
957c743a 2187 /**
530c1441 2188 * @deprecated use encoder private options instead
957c743a 2189 */
530c1441 2190 attribute_deprecated
b1edfce0 2191 int lmin;
6e0d8c06
MN
2192
2193 /**
530c1441 2194 * @deprecated use encoder private options instead
6e0d8c06 2195 */
530c1441 2196 attribute_deprecated
b1edfce0 2197 int lmax;
530c1441 2198#endif
6e0d8c06
MN
2199
2200 /**
b1edfce0 2201 * frame skip threshold
f5bccd85 2202 * - encoding: Set by user.
6e0d8c06
MN
2203 * - decoding: unused
2204 */
b1edfce0 2205 int frame_skip_threshold;
09c3e44e
MN
2206
2207 /**
b1edfce0 2208 * frame skip factor
f5bccd85 2209 * - encoding: Set by user.
09c3e44e
MN
2210 * - decoding: unused
2211 */
b1edfce0 2212 int frame_skip_factor;
316a2ec8
MN
2213
2214 /**
b1edfce0 2215 * frame skip exponent
f5bccd85 2216 * - encoding: Set by user.
316a2ec8
MN
2217 * - decoding: unused
2218 */
b1edfce0 2219 int frame_skip_exp;
e8501c93
MN
2220
2221 /**
b1edfce0 2222 * frame skip comparison function
f5bccd85 2223 * - encoding: Set by user.
e8501c93
MN
2224 * - decoding: unused
2225 */
b1edfce0 2226 int frame_skip_cmp;
58f7833e 2227
58f7833e 2228 /**
b1edfce0 2229 * trellis RD quantization
f5bccd85 2230 * - encoding: Set by user.
58f7833e
RS
2231 * - decoding: unused
2232 */
b1edfce0 2233 int trellis;
58f7833e
RS
2234
2235 /**
f5bccd85 2236 * - encoding: Set by user.
b1edfce0 2237 * - decoding: unused
58f7833e 2238 */
b1edfce0 2239 int min_prediction_order;
58f7833e
RS
2240
2241 /**
f5bccd85 2242 * - encoding: Set by user.
58f7833e
RS
2243 * - decoding: unused
2244 */
b1edfce0 2245 int max_prediction_order;
58f7833e 2246
58f7833e 2247 /**
b1edfce0 2248 * GOP timecode frame start number, in non drop frame format
f5bccd85 2249 * - encoding: Set by user.
58f7833e
RS
2250 * - decoding: unused
2251 */
b1edfce0
AK
2252 int64_t timecode_frame_start;
2253
2254 /* The RTP callback: This function is called */
2255 /* every time the encoder has a packet to send. */
2256 /* It depends on the encoder if the data starts */
2257 /* with a Start Code (it should). H.263 does. */
2258 /* mb_nb contains the number of macroblocks */
2259 /* encoded in the RTP payload. */
2260 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
2261
2262 int rtp_payload_size; /* The size of the RTP payload: the coder will */
2263 /* do its best to deliver a chunk with size */
2264 /* below rtp_payload_size, the chunk will start */
2265 /* with a start code on some codecs like H.263. */
2266 /* This doesn't take account of any particular */
2267 /* headers inside the transmitted RTP payload. */
2268
2269 /* statistics, used for 2-pass encoding */
2270 int mv_bits;
2271 int header_bits;
2272 int i_tex_bits;
2273 int p_tex_bits;
2274 int i_count;
2275 int p_count;
2276 int skip_count;
2277 int misc_bits;
58f7833e 2278
14f0c8e2 2279 /**
b1edfce0
AK
2280 * number of bits used for the previously encoded frame
2281 * - encoding: Set by libavcodec.
14f0c8e2
LA
2282 * - decoding: unused
2283 */
b1edfce0 2284 int frame_bits;
39a64e30
CH
2285
2286 /**
b1edfce0
AK
2287 * pass1 encoding statistics output buffer
2288 * - encoding: Set by libavcodec.
39a64e30
CH
2289 * - decoding: unused
2290 */
b1edfce0 2291 char *stats_out;
1dd509b1
MN
2292
2293 /**
b1edfce0
AK
2294 * pass2 encoding statistics input buffer
2295 * Concatenated stuff from stats_out of pass1 should be placed here.
2296 * - encoding: Allocated/set/freed by user.
1dd509b1
MN
2297 * - decoding: unused
2298 */
b1edfce0 2299 char *stats_in;
f9243d34
CH
2300
2301 /**
b1edfce0
AK
2302 * Work around bugs in encoders which sometimes cannot be detected automatically.
2303 * - encoding: Set by user
2304 * - decoding: Set by user
f9243d34 2305 */
b1edfce0
AK
2306 int workaround_bugs;
2307#define FF_BUG_AUTODETECT 1 ///< autodetection
eb5920c1 2308#if FF_API_OLD_MSMPEG4
b1edfce0 2309#define FF_BUG_OLD_MSMPEG4 2
eb5920c1 2310#endif
b1edfce0
AK
2311#define FF_BUG_XVID_ILACE 4
2312#define FF_BUG_UMP4 8
2313#define FF_BUG_NO_PADDING 16
2314#define FF_BUG_AMV 32
0300962b 2315#if FF_API_AC_VLC
b1edfce0 2316#define FF_BUG_AC_VLC 0 ///< Will be removed, libavcodec can now handle these non-compliant files by default.
0300962b 2317#endif
b1edfce0
AK
2318#define FF_BUG_QPEL_CHROMA 64
2319#define FF_BUG_STD_QPEL 128
2320#define FF_BUG_QPEL_CHROMA2 256
2321#define FF_BUG_DIRECT_BLOCKSIZE 512
2322#define FF_BUG_EDGE 1024
2323#define FF_BUG_HPEL_CHROMA 2048
2324#define FF_BUG_DC_CLIP 4096
2325#define FF_BUG_MS 8192 ///< Work around various bugs in Microsoft's broken decoders.
2326#define FF_BUG_TRUNCATED 16384
a403fc03
JR
2327
2328 /**
b1edfce0 2329 * strictly follow the standard (MPEG4, ...).
f5bccd85 2330 * - encoding: Set by user.
b1edfce0
AK
2331 * - decoding: Set by user.
2332 * Setting this to STRICT or higher means the encoder and decoder will
2333 * generally do stupid things, whereas setting it to unofficial or lower
2334 * will mean the encoder might produce output that is not supported by all
2335 * spec-compliant decoders. Decoders don't differentiate between normal,
2336 * unofficial and experimental (that is, they always try to decode things
2337 * when they can) unless they are explicitly asked to behave stupidly
2338 * (=strictly conform to the specs)
a403fc03 2339 */
b1edfce0
AK
2340 int strict_std_compliance;
2341#define FF_COMPLIANCE_VERY_STRICT 2 ///< Strictly conform to an older more strict version of the spec or reference software.
2342#define FF_COMPLIANCE_STRICT 1 ///< Strictly conform to all the things in the spec no matter what consequences.
2343#define FF_COMPLIANCE_NORMAL 0
2344#define FF_COMPLIANCE_UNOFFICIAL -1 ///< Allow unofficial extensions
2345#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
a403fc03 2346
a403fc03 2347 /**
b1edfce0
AK
2348 * error concealment flags
2349 * - encoding: unused
2350 * - decoding: Set by user.
a403fc03 2351 */
b1edfce0
AK
2352 int error_concealment;
2353#define FF_EC_GUESS_MVS 1
2354#define FF_EC_DEBLOCK 2
a403fc03
JR
2355
2356 /**
b1edfce0 2357 * debug
f5bccd85 2358 * - encoding: Set by user.
b1edfce0 2359 * - decoding: Set by user.
a403fc03 2360 */
b1edfce0
AK
2361 int debug;
2362#define FF_DEBUG_PICT_INFO 1
2363#define FF_DEBUG_RC 2
2364#define FF_DEBUG_BITSTREAM 4
2365#define FF_DEBUG_MB_TYPE 8
2366#define FF_DEBUG_QP 16
ccc71298
AK
2367#if FF_API_DEBUG_MV
2368/**
2369 * @deprecated this option does nothing
2370 */
b1edfce0 2371#define FF_DEBUG_MV 32
ccc71298 2372#endif
b1edfce0
AK
2373#define FF_DEBUG_DCT_COEFF 0x00000040
2374#define FF_DEBUG_SKIP 0x00000080
2375#define FF_DEBUG_STARTCODE 0x00000100
9f17685d 2376#if FF_API_UNUSED_MEMBERS
b1edfce0 2377#define FF_DEBUG_PTS 0x00000200
9f17685d 2378#endif /* FF_API_UNUSED_MEMBERS */
b1edfce0
AK
2379#define FF_DEBUG_ER 0x00000400
2380#define FF_DEBUG_MMCO 0x00000800
2381#define FF_DEBUG_BUGS 0x00001000
f8b2bcd2 2382#if FF_API_DEBUG_MV
b1edfce0
AK
2383#define FF_DEBUG_VIS_QP 0x00002000
2384#define FF_DEBUG_VIS_MB_TYPE 0x00004000
f8b2bcd2 2385#endif
b1edfce0
AK
2386#define FF_DEBUG_BUFFERS 0x00008000
2387#define FF_DEBUG_THREADS 0x00010000
188dea1d 2388
a1504eee 2389#if FF_API_DEBUG_MV
80d617f5 2390 /**
a1504eee 2391 * @deprecated this option does not have any effect
80d617f5 2392 */
a1504eee 2393 attribute_deprecated
b1edfce0
AK
2394 int debug_mv;
2395#define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
2396#define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
2397#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
a1504eee 2398#endif
b1ec601f
RD
2399
2400 /**
b1edfce0 2401 * Error recognition; may misdetect some more or less valid parts as errors.
85947156
VS
2402 * - encoding: unused
2403 * - decoding: Set by user.
b1ec601f 2404 */
b1edfce0 2405 int err_recognition;
23a211cb
AK
2406
2407/**
2408 * Verify checksums embedded in the bitstream (could be of either encoded or
2409 * decoded data, depending on the codec) and print an error message on mismatch.
2410 * If AV_EF_EXPLODE is also set, a mismatching checksum will result in the
2411 * decoder returning an error.
2412 */
b1edfce0
AK
2413#define AV_EF_CRCCHECK (1<<0)
2414#define AV_EF_BITSTREAM (1<<1)
2415#define AV_EF_BUFFER (1<<2)
2416#define AV_EF_EXPLODE (1<<3)
1408352a 2417
79de84f2
MN
2418 /**
2419 * opaque 64bit number (generally a PTS) that will be reordered and
2420 * output in AVFrame.reordered_opaque
2421 * - encoding: unused
2422 * - decoding: Set by user.
2423 */
2424 int64_t reordered_opaque;
312420f3
PR
2425
2426 /**
b1edfce0
AK
2427 * Hardware accelerator in use
2428 * - encoding: unused.
2429 * - decoding: Set by libavcodec
312420f3 2430 */
b1edfce0 2431 struct AVHWAccel *hwaccel;
0d72e7d0
PR
2432
2433 /**
b1edfce0
AK
2434 * Hardware accelerator context.
2435 * For some hardware accelerators, a global context needs to be
2436 * provided by the user. In that case, this holds display-dependent
2437 * data Libav cannot instantiate itself. Please refer to the
2438 * Libav HW accelerator documentation to know how to fill this
2439 * is. e.g. for VA API, this is a struct vaapi_context.
2440 * - encoding: unused
2441 * - decoding: Set by user
0d72e7d0 2442 */
b1edfce0 2443 void *hwaccel_context;
0d72e7d0
PR
2444
2445 /**
b1edfce0
AK
2446 * error
2447 * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
2448 * - decoding: unused
0d72e7d0 2449 */
b1edfce0 2450 uint64_t error[AV_NUM_DATA_POINTERS];
3bff4d8b
BC
2451
2452 /**
b1edfce0 2453 * DCT algorithm, see FF_DCT_* below
3bff4d8b 2454 * - encoding: Set by user.
b1edfce0 2455 * - decoding: unused
3bff4d8b 2456 */
b1edfce0
AK
2457 int dct_algo;
2458#define FF_DCT_AUTO 0
2459#define FF_DCT_FASTINT 1
9f17685d 2460#if FF_API_UNUSED_MEMBERS
b1edfce0 2461#define FF_DCT_INT 2
9f17685d 2462#endif /* FF_API_UNUSED_MEMBERS */
b1edfce0
AK
2463#define FF_DCT_MMX 3
2464#define FF_DCT_ALTIVEC 5
2465#define FF_DCT_FAAN 6
3bff4d8b
BC
2466
2467 /**
b1edfce0 2468 * IDCT algorithm, see FF_IDCT_* below.
3bff4d8b 2469 * - encoding: Set by user.
b1edfce0 2470 * - decoding: Set by user.
3bff4d8b 2471 */
b1edfce0
AK
2472 int idct_algo;
2473#define FF_IDCT_AUTO 0
2474#define FF_IDCT_INT 1
2475#define FF_IDCT_SIMPLE 2
2476#define FF_IDCT_SIMPLEMMX 3
b1edfce0
AK
2477#define FF_IDCT_ARM 7
2478#define FF_IDCT_ALTIVEC 8
d6096a67 2479#if FF_API_ARCH_SH4
b1edfce0 2480#define FF_IDCT_SH4 9
d6096a67 2481#endif
b1edfce0 2482#define FF_IDCT_SIMPLEARM 10
9f17685d 2483#if FF_API_UNUSED_MEMBERS
b1edfce0 2484#define FF_IDCT_IPP 13
9f17685d 2485#endif /* FF_API_UNUSED_MEMBERS */
d35b94fb
DB
2486#define FF_IDCT_XVID 14
2487#if FF_API_IDCT_XVIDMMX
b1edfce0 2488#define FF_IDCT_XVIDMMX 14
d35b94fb 2489#endif /* FF_API_IDCT_XVIDMMX */
b1edfce0
AK
2490#define FF_IDCT_SIMPLEARMV5TE 16
2491#define FF_IDCT_SIMPLEARMV6 17
b4dd424d 2492#if FF_API_ARCH_SPARC
b1edfce0 2493#define FF_IDCT_SIMPLEVIS 18
b4dd424d 2494#endif
b1edfce0 2495#define FF_IDCT_FAAN 20
b1edfce0 2496#define FF_IDCT_SIMPLENEON 22
c7f7bfc9 2497#if FF_API_ARCH_ALPHA
b1edfce0 2498#define FF_IDCT_SIMPLEALPHA 23
c7f7bfc9 2499#endif
40e5d31b 2500
b1edfce0
AK
2501 /**
2502 * bits per sample/pixel from the demuxer (needed for huffyuv).
2503 * - encoding: Set by libavcodec.
2504 * - decoding: Set by user.
2505 */
2506 int bits_per_coded_sample;
2507
2508 /**
2509 * Bits per sample/pixel of internal libavcodec pixel/sample format.
2510 * - encoding: set by user.
2511 * - decoding: set by libavcodec.
2512 */
2513 int bits_per_raw_sample;
3797c74b 2514
803d21f3 2515#if FF_API_LOWRES
3797c74b 2516 /**
b1edfce0
AK
2517 * low resolution decoding, 1-> 1/2 size, 2->1/4 size
2518 * - encoding: unused
2519 * - decoding: Set by user.
803d21f3
AK
2520 *
2521 * @deprecated use decoder private options instead
3797c74b 2522 */
2bcbd984 2523 attribute_deprecated int lowres;
803d21f3 2524#endif
1aea7018
GB
2525
2526 /**
b1edfce0
AK
2527 * the picture in the bitstream
2528 * - encoding: Set by libavcodec.
2ff302cb 2529 * - decoding: unused
1aea7018 2530 */
b1edfce0 2531 AVFrame *coded_frame;
4ee6a5c1
MN
2532
2533 /**
b1edfce0
AK
2534 * thread count
2535 * is used to decide how many independent tasks should be passed to execute()
2536 * - encoding: Set by user.
2537 * - decoding: Set by user.
4ee6a5c1 2538 */
b1edfce0 2539 int thread_count;
4ee6a5c1
MN
2540
2541 /**
b1edfce0
AK
2542 * Which multithreading methods to use.
2543 * Use of FF_THREAD_FRAME will increase decoding delay by one frame per thread,
2544 * so clients which cannot provide future frames should not use it.
2545 *
2546 * - encoding: Set by user, otherwise the default is used.
2547 * - decoding: Set by user, otherwise the default is used.
4ee6a5c1 2548 */
b1edfce0
AK
2549 int thread_type;
2550#define FF_THREAD_FRAME 1 ///< Decode more than one frame at once
2551#define FF_THREAD_SLICE 2 ///< Decode more than one part of a single frame at once
4ee6a5c1
MN
2552
2553 /**
b1edfce0
AK
2554 * Which multithreading methods are in use by the codec.
2555 * - encoding: Set by libavcodec.
2556 * - decoding: Set by libavcodec.
4ee6a5c1 2557 */
b1edfce0 2558 int active_thread_type;
4ee6a5c1
MN
2559
2560 /**
b1edfce0 2561 * Set by the client if its custom get_buffer() callback can be called
ad027866 2562 * synchronously from another thread, which allows faster multithreaded decoding.
b1edfce0
AK
2563 * draw_horiz_band() will be called from other threads regardless of this setting.
2564 * Ignored if the default get_buffer() is used.
2565 * - encoding: Set by user.
2566 * - decoding: Set by user.
4ee6a5c1 2567 */
b1edfce0 2568 int thread_safe_callbacks;
580a7465
DC
2569
2570 /**
b1edfce0
AK
2571 * The codec may call this to execute several independent things.
2572 * It will return only after finishing all tasks.
2573 * The user may replace this with some multithreaded implementation,
2574 * the default implementation will execute the parts serially.
2575 * @param count the number of things to execute
2576 * - encoding: Set by libavcodec, user can override.
2577 * - decoding: Set by libavcodec, user can override.
580a7465 2578 */
b1edfce0 2579 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size);
8d23a86f
RD
2580
2581 /**
2582 * The codec may call this to execute several independent things.
2583 * It will return only after finishing all tasks.
2584 * The user may replace this with some multithreaded implementation,
2585 * the default implementation will execute the parts serially.
2586 * Also see avcodec_thread_init and e.g. the --enable-pthread configure option.
2587 * @param c context passed also to func
2588 * @param count the number of things to execute
2589 * @param arg2 argument passed unchanged to func
2590 * @param ret return values of executed functions, must have space for "count" values. May be NULL.
2591 * @param func function that will be called count times, with jobnr from 0 to count-1.
2592 * threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no
2593 * two instances of func executing at the same time will have the same threadnr.
2594 * @return always 0 currently, but code should handle a future improvement where when any call to func
2595 * returns < 0 no further calls to func may be done and < 0 is returned.
2596 * - encoding: Set by libavcodec, user can override.
2597 * - decoding: Set by libavcodec, user can override.
2598 */
2599 int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count);
096c87f6 2600
38ecc370 2601#if FF_API_THREAD_OPAQUE
b1edfce0 2602 /**
38ecc370 2603 * @deprecated this field should not be used from outside of lavc
b1edfce0 2604 */
38ecc370 2605 attribute_deprecated
b1edfce0 2606 void *thread_opaque;
38ecc370 2607#endif
23940f14 2608
2aa72ecc 2609 /**
b1edfce0
AK
2610 * noise vs. sse weight for the nsse comparsion function
2611 * - encoding: Set by user.
2aa72ecc
JZ
2612 * - decoding: unused
2613 */
b1edfce0 2614 int nsse_weight;
cb2c971d
AJ
2615
2616 /**
b1edfce0
AK
2617 * profile
2618 * - encoding: Set by user.
2619 * - decoding: Set by libavcodec.
cb2c971d 2620 */
b1edfce0
AK
2621 int profile;
2622#define FF_PROFILE_UNKNOWN -99
2623#define FF_PROFILE_RESERVED -100
2624
2625#define FF_PROFILE_AAC_MAIN 0
2626#define FF_PROFILE_AAC_LOW 1
2627#define FF_PROFILE_AAC_SSR 2
2628#define FF_PROFILE_AAC_LTP 3
372597e5
MS
2629#define FF_PROFILE_AAC_HE 4
2630#define FF_PROFILE_AAC_HE_V2 28
2631#define FF_PROFILE_AAC_LD 22
2632#define FF_PROFILE_AAC_ELD 38
95d52464
KK
2633#define FF_PROFILE_MPEG2_AAC_LOW 128
2634#define FF_PROFILE_MPEG2_AAC_HE 131
b1edfce0
AK
2635
2636#define FF_PROFILE_DTS 20
2637#define FF_PROFILE_DTS_ES 30
2638#define FF_PROFILE_DTS_96_24 40
2639#define FF_PROFILE_DTS_HD_HRA 50
2640#define FF_PROFILE_DTS_HD_MA 60
2641
2642#define FF_PROFILE_MPEG2_422 0
2643#define FF_PROFILE_MPEG2_HIGH 1
2644#define FF_PROFILE_MPEG2_SS 2
2645#define FF_PROFILE_MPEG2_SNR_SCALABLE 3
2646#define FF_PROFILE_MPEG2_MAIN 4
2647#define FF_PROFILE_MPEG2_SIMPLE 5
2648
2649#define FF_PROFILE_H264_CONSTRAINED (1<<9) // 8+1; constraint_set1_flag
2650#define FF_PROFILE_H264_INTRA (1<<11) // 8+3; constraint_set3_flag
2651
2652#define FF_PROFILE_H264_BASELINE 66
2653#define FF_PROFILE_H264_CONSTRAINED_BASELINE (66|FF_PROFILE_H264_CONSTRAINED)
2654#define FF_PROFILE_H264_MAIN 77
2655#define FF_PROFILE_H264_EXTENDED 88
2656#define FF_PROFILE_H264_HIGH 100
2657#define FF_PROFILE_H264_HIGH_10 110
2658#define FF_PROFILE_H264_HIGH_10_INTRA (110|FF_PROFILE_H264_INTRA)
2659#define FF_PROFILE_H264_HIGH_422 122
2660#define FF_PROFILE_H264_HIGH_422_INTRA (122|FF_PROFILE_H264_INTRA)
2661#define FF_PROFILE_H264_HIGH_444 144
2662#define FF_PROFILE_H264_HIGH_444_PREDICTIVE 244
2663#define FF_PROFILE_H264_HIGH_444_INTRA (244|FF_PROFILE_H264_INTRA)
2664#define FF_PROFILE_H264_CAVLC_444 44
2665
2666#define FF_PROFILE_VC1_SIMPLE 0
2667#define FF_PROFILE_VC1_MAIN 1
2668#define FF_PROFILE_VC1_COMPLEX 2
2669#define FF_PROFILE_VC1_ADVANCED 3
2670
2671#define FF_PROFILE_MPEG4_SIMPLE 0
2672#define FF_PROFILE_MPEG4_SIMPLE_SCALABLE 1
2673#define FF_PROFILE_MPEG4_CORE 2
2674#define FF_PROFILE_MPEG4_MAIN 3
2675#define FF_PROFILE_MPEG4_N_BIT 4
2676#define FF_PROFILE_MPEG4_SCALABLE_TEXTURE 5
2677#define FF_PROFILE_MPEG4_SIMPLE_FACE_ANIMATION 6
2678#define FF_PROFILE_MPEG4_BASIC_ANIMATED_TEXTURE 7
2679#define FF_PROFILE_MPEG4_HYBRID 8
2680#define FF_PROFILE_MPEG4_ADVANCED_REAL_TIME 9
2681#define FF_PROFILE_MPEG4_CORE_SCALABLE 10
2682#define FF_PROFILE_MPEG4_ADVANCED_CODING 11
2683#define FF_PROFILE_MPEG4_ADVANCED_CORE 12
2684#define FF_PROFILE_MPEG4_ADVANCED_SCALABLE_TEXTURE 13
2685#define FF_PROFILE_MPEG4_SIMPLE_STUDIO 14
2686#define FF_PROFILE_MPEG4_ADVANCED_SIMPLE 15
393cbb96 2687
c81a7063
NB
2688#define FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_0 0
2689#define FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_1 1
2690#define FF_PROFILE_JPEG2000_CSTREAM_NO_RESTRICTION 2
2691#define FF_PROFILE_JPEG2000_DCINEMA_2K 3
2692#define FF_PROFILE_JPEG2000_DCINEMA_4K 4
2693
2a41826b
GC
2694
2695#define FF_PROFILE_HEVC_MAIN 1
2696#define FF_PROFILE_HEVC_MAIN_10 2
2697#define FF_PROFILE_HEVC_MAIN_STILL_PICTURE 3
2698
393cbb96 2699 /**
b1edfce0
AK
2700 * level
2701 * - encoding: Set by user.
2702 * - decoding: Set by libavcodec.
393cbb96 2703 */
b1edfce0
AK
2704 int level;
2705#define FF_LEVEL_UNKNOWN -99
37b00b47 2706
37b00b47 2707 /**
37b00b47 2708 *
b1edfce0
AK
2709 * - encoding: unused
2710 * - decoding: Set by user.
37b00b47 2711 */
b1edfce0 2712 enum AVDiscard skip_loop_filter;
37b00b47
AS
2713
2714 /**
b1edfce0
AK
2715 *
2716 * - encoding: unused
2717 * - decoding: Set by user.
37b00b47 2718 */
b1edfce0 2719 enum AVDiscard skip_idct;
37b00b47
AS
2720
2721 /**
b1edfce0
AK
2722 *
2723 * - encoding: unused
37b00b47
AS
2724 * - decoding: Set by user.
2725 */
b1edfce0 2726 enum AVDiscard skip_frame;
55bad0c6
CM
2727
2728 /**
b1edfce0
AK
2729 * Header containing style information for text subtitles.
2730 * For SUBTITLE_ASS subtitle type, it should contain the whole ASS
2731 * [Script Info] and [V4+ Styles] section, plus the [Events] line and
2732 * the Format line following. It shouldn't include any Dialogue line.
2733 * - encoding: Set/allocated/freed by user (before avcodec_open2())
2734 * - decoding: Set/allocated/freed by libavcodec (by avcodec_open2())
55bad0c6 2735 */
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AK
2736 uint8_t *subtitle_header;
2737 int subtitle_header_size;
34b47d7c 2738
8941971a 2739#if FF_API_ERROR_RATE
34b47d7c 2740 /**
8941971a
AK
2741 * @deprecated use the 'error_rate' private AVOption of the mpegvideo
2742 * encoders
64150ff0 2743 */
8941971a 2744 attribute_deprecated
b1edfce0 2745 int error_rate;
8941971a 2746#endif
582f2311 2747
da6506c6 2748#if FF_API_CODEC_PKT
582f2311 2749 /**
da6506c6 2750 * @deprecated this field is not supposed to be accessed from outside lavc
582f2311 2751 */
da6506c6 2752 attribute_deprecated
b1edfce0 2753 AVPacket *pkt;
da6506c6 2754#endif
f3a29b75
JR
2755
2756 /**
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AK
2757 * VBV delay coded in the last frame (in periods of a 27 MHz clock).
2758 * Used for compliant TS muxing.
2759 * - encoding: Set by libavcodec.
2760 * - decoding: unused.
4bf3c8f2 2761 */
b1edfce0 2762 uint64_t vbv_delay;
0957b274
AK
2763
2764 /**
2765 * Encoding only. Allow encoders to output packets that do not contain any
2766 * encoded data, only side data.
2767 *
2768 * Some encoders need to output such packets, e.g. to update some stream
2769 * parameters at the end of encoding.
2770 *
2771 * All callers are strongly recommended to set this option to 1 and update
2772 * their code to deal with such packets, since this behaviour may become
2773 * always enabled in the future (then this option will be deprecated and
2774 * later removed). To avoid ABI issues when this happens, the callers should
2775 * use AVOptions to set this field.
2776 */
2777 int side_data_only_packets;
2df0c32e
AK
2778
2779 /**
2780 * Audio only. The number of "priming" samples (padding) inserted by the
2781 * encoder at the beginning of the audio. I.e. this number of leading
2782 * decoded samples must be discarded by the caller to get the original audio
2783 * without leading padding.
2784 *
2785 * - decoding: unused
2786 * - encoding: Set by libavcodec. The timestamps on the output packets are
2787 * adjusted by the encoder so that they always refer to the
2788 * first sample of the data actually contained in the packet,
2789 * including any added padding. E.g. if the timebase is
2790 * 1/samplerate and the timestamp of the first input sample is
2791 * 0, the timestamp of the first output packet will be
2792 * -initial_padding.
2793 */
2794 int initial_padding;
7ea1b347
AK
2795
2796 /*
2797 * - decoding: For codecs that store a framerate value in the compressed
2798 * bitstream, the decoder may export it here. { 0, 1} when
2799 * unknown.
2800 * - encoding: unused
2801 */
2802 AVRational framerate;
57b6704e
RDC
2803
2804 /**
2805 * Nominal unaccelerated pixel format, see AV_PIX_FMT_xxx.
2806 * - encoding: unused.
2807 * - decoding: Set by libavcodec before calling get_format()
2808 */
2809 enum AVPixelFormat sw_pix_fmt;
de6d9b64
FB
2810} AVCodecContext;
2811
64863965 2812/**
060ec0a8
AH
2813 * AVProfile.
2814 */
2815typedef struct AVProfile {
2816 int profile;
2817 const char *name; ///< short name for the profile
2818} AVProfile;
2819
84626b36
AK
2820typedef struct AVCodecDefault AVCodecDefault;
2821
466b39ef
AK
2822struct AVSubtitle;
2823
060ec0a8 2824/**
64863965
MN
2825 * AVCodec.
2826 */
de6d9b64 2827typedef struct AVCodec {
6b0cdb6e
NG
2828 /**
2829 * Name of the codec implementation.
2830 * The name is globally unique among encoders and among decoders (but an
2831 * encoder and a decoder can share the same name).
2832 * This is the primary way to find a codec from the user perspective.
2833 */
18f77016 2834 const char *name;
f5f49a66
AK
2835 /**
2836 * Descriptive name for the codec, meant to be more human readable than name.
2837 * You should use the NULL_IF_CONFIG_SMALL() macro to define it.
2838 */
2839 const char *long_name;
72415b2a 2840 enum AVMediaType type;
36ef5369 2841 enum AVCodecID id;
a2d11246
MN
2842 /**
2843 * Codec capabilities.
2844 * see CODEC_CAP_*
2845 */
bf89e6b1 2846 int capabilities;
716e31ea 2847 const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0}
716d413c 2848 const enum AVPixelFormat *pix_fmts; ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1
3ade5d56 2849 const int *supported_samplerates; ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
5d6e4c16 2850 const enum AVSampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1
cc276c85 2851 const uint64_t *channel_layouts; ///< array of support channel layouts, or NULL if unknown. array is terminated by 0
451606f7 2852#if FF_API_LOWRES
2bcbd984 2853 attribute_deprecated uint8_t max_lowres; ///< maximum value for lowres supported by the decoder
451606f7 2854#endif
567ad0e3 2855 const AVClass *priv_class; ///< AVClass for the private context
060ec0a8 2856 const AVProfile *profiles; ///< array of recognized profiles, or NULL if unknown, array is terminated by {FF_PROFILE_UNKNOWN}
37b00b47 2857
f5f49a66
AK
2858 /*****************************************************************
2859 * No fields below this line are part of the public API. They
2860 * may not be used outside of libavcodec and can be changed and
2861 * removed at will.
2862 * New public fields should be added right above.
2863 *****************************************************************
2864 */
2865 int priv_data_size;
2866 struct AVCodec *next;
37b00b47 2867 /**
21a19b79 2868 * @name Frame-level threading support functions
37b00b47
AS
2869 * @{
2870 */
2871 /**
2872 * If defined, called on thread contexts when they are created.
2873 * If the codec allocates writable tables in init(), re-allocate them here.
2874 * priv_data will be set to a copy of the original.
2875 */
2876 int (*init_thread_copy)(AVCodecContext *);
2877 /**
2878 * Copy necessary context variables from a previous thread context to the current one.
2879 * If not defined, the next thread will start automatically; otherwise, the codec
2880 * must call ff_thread_finish_setup().
2881 *
2882 * dst and src will (rarely) point to the same context, in which case memcpy should be skipped.
2883 */
2884 int (*update_thread_context)(AVCodecContext *dst, const AVCodecContext *src);
2885 /** @} */
84626b36
AK
2886
2887 /**
2888 * Private codec-specific defaults.
2889 */
2890 const AVCodecDefault *defaults;
d97efd7f
AK
2891
2892 /**
2893 * Initialize codec static data, called from avcodec_register().
2894 */
2895 void (*init_static_data)(struct AVCodec *codec);
b2c75b6e 2896
f5f49a66 2897 int (*init)(AVCodecContext *);
466b39ef
AK
2898 int (*encode_sub)(AVCodecContext *, uint8_t *buf, int buf_size,
2899 const struct AVSubtitle *sub);
b2c75b6e
JR
2900 /**
2901 * Encode data to an AVPacket.
2902 *
2903 * @param avctx codec context
2904 * @param avpkt output AVPacket (may contain a user-provided buffer)
2905 * @param[in] frame AVFrame containing the raw data to be encoded
2906 * @param[out] got_packet_ptr encoder sets to 0 or 1 to indicate that a
2907 * non-empty packet was returned in avpkt.
2908 * @return 0 on success, negative error code on failure
2909 */
2910 int (*encode2)(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame,
2911 int *got_packet_ptr);
f5f49a66
AK
2912 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt);
2913 int (*close)(AVCodecContext *);
2914 /**
2915 * Flush buffers.
2916 * Will be called when seeking
2917 */
2918 void (*flush)(AVCodecContext *);
de6d9b64
FB
2919} AVCodec;
2920
97d96aaa 2921/**
d565fef1
RDC
2922 * @defgroup lavc_hwaccel AVHWAccel
2923 * @{
40e5d31b
GB
2924 */
2925typedef struct AVHWAccel {
2926 /**
2927 * Name of the hardware accelerated codec.
2928 * The name is globally unique among encoders and among decoders (but an
2929 * encoder and a decoder can share the same name).
2930 */
2931 const char *name;
2932
2933 /**
2934 * Type of codec implemented by the hardware accelerator.
2935 *
72415b2a 2936 * See AVMEDIA_TYPE_xxx
40e5d31b 2937 */
72415b2a 2938 enum AVMediaType type;
40e5d31b
GB
2939
2940 /**
2941 * Codec implemented by the hardware accelerator.
2942 *
36ef5369 2943 * See AV_CODEC_ID_xxx
40e5d31b 2944 */
36ef5369 2945 enum AVCodecID id;
40e5d31b
GB
2946
2947 /**
2948 * Supported pixel format.
2949 *
2950 * Only hardware accelerated formats are supported here.
2951 */
716d413c 2952 enum AVPixelFormat pix_fmt;
40e5d31b
GB
2953
2954 /**
2955 * Hardware accelerated codec capabilities.
2956 * see FF_HWACCEL_CODEC_CAP_*
2957 */
2958 int capabilities;
2959
08bb2567
AK
2960 /*****************************************************************
2961 * No fields below this line are part of the public API. They
2962 * may not be used outside of libavcodec and can be changed and
2963 * removed at will.
2964 * New public fields should be added right above.
2965 *****************************************************************
2966 */
40e5d31b
GB
2967 struct AVHWAccel *next;
2968
2969 /**
ebc29519
LB
2970 * Allocate a custom buffer
2971 */
2972 int (*alloc_frame)(AVCodecContext *avctx, AVFrame *frame);
2973
2974 /**
40e5d31b
GB
2975 * Called at the beginning of each frame or field picture.
2976 *
2977 * Meaningful frame information (codec specific) is guaranteed to
2978 * be parsed at this point. This function is mandatory.
2979 *
bf7e799c 2980 * Note that buf can be NULL along with buf_size set to 0.
40e5d31b
GB
2981 * Otherwise, this means the whole frame is available at this point.
2982 *
2983 * @param avctx the codec context
2984 * @param buf the frame data buffer base
2985 * @param buf_size the size of the frame in bytes
2986 * @return zero if successful, a negative value otherwise
2987 */
2988 int (*start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
2989
2990 /**
2991 * Callback for each slice.
2992 *
2993 * Meaningful slice information (codec specific) is guaranteed to
2994 * be parsed at this point. This function is mandatory.
2995 *
2996 * @param avctx the codec context
2997 * @param buf the slice data buffer base
2998 * @param buf_size the size of the slice in bytes
2999 * @return zero if successful, a negative value otherwise
3000 */
3001 int (*decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
3002
3003 /**
3004 * Called at the end of each frame or field picture.
3005 *
3006 * The whole picture is parsed at this point and can now be sent
3007 * to the hardware accelerator. This function is mandatory.
3008 *
3009 * @param avctx the codec context
3010 * @return zero if successful, a negative value otherwise
3011 */
3012 int (*end_frame)(AVCodecContext *avctx);
68e5d523
GB
3013
3014 /**
a871ef0c 3015 * Size of per-frame hardware accelerator private data.
68e5d523 3016 *
cd823ff9
GB
3017 * Private data is allocated with av_mallocz() before
3018 * AVCodecContext.get_buffer() and deallocated after
3019 * AVCodecContext.release_buffer().
68e5d523 3020 */
a871ef0c 3021 int frame_priv_data_size;
dd2d3b76
AK
3022
3023 /**
3024 * Initialize the hwaccel private data.
3025 *
3026 * This will be called from ff_get_format(), after hwaccel and
3027 * hwaccel_context are set and the hwaccel private data in AVCodecInternal
3028 * is allocated.
3029 */
3030 int (*init)(AVCodecContext *avctx);
3031
3032 /**
3033 * Uninitialize the hwaccel private data.
3034 *
3035 * This will be called from get_format() or avcodec_close(), after hwaccel
3036 * and hwaccel_context are already uninitialized.
3037 */
3038 int (*uninit)(AVCodecContext *avctx);
3039
3040 /**
3041 * Size of the private data to allocate in
3042 * AVCodecInternal.hwaccel_priv_data.
3043 */
3044 int priv_data_size;
40e5d31b
GB
3045} AVHWAccel;
3046
3047/**
d565fef1
RDC
3048 * Hardware acceleration should be used for decoding even if the codec level
3049 * used is unknown or higher than the maximum supported level reported by the
3050 * hardware driver.
3051 */
3052#define AV_HWACCEL_FLAG_IGNORE_LEVEL (1 << 0)
3053
3054/**
6c99c92a
RDC
3055 * Hardware acceleration can output YUV pixel formats with a different chroma
3056 * sampling than 4:2:0 and/or other than 8 bits per component.
3057 */
3058#define AV_HWACCEL_FLAG_ALLOW_HIGH_DEPTH (1 << 1)
3059
3060/**
d565fef1
RDC
3061 * @}
3062 */
3063
3064/**
6aadfbda
AK
3065 * @defgroup lavc_picture AVPicture
3066 *
3067 * Functions for working with AVPicture
3068 * @{
3069 */
3070
3071/**
d7425f59
MN
3072 * four components are given, that's all.
3073 * the last component is alpha
3074 */
de6d9b64 3075typedef struct AVPicture {
560f773c
JR
3076 uint8_t *data[AV_NUM_DATA_POINTERS];
3077 int linesize[AV_NUM_DATA_POINTERS]; ///< number of bytes per line
de6d9b64
FB
3078} AVPicture;
3079
6aadfbda
AK
3080/**
3081 * @}
3082 */
3083
63e4c8a6
AK
3084#define AVPALETTE_SIZE 1024
3085#define AVPALETTE_COUNT 256
ba118447 3086
c66216ed
MN
3087enum AVSubtitleType {
3088 SUBTITLE_NONE,
3089
3090 SUBTITLE_BITMAP, ///< A bitmap, pict will be set
3091
3092 /**
3093 * Plain text, the text field must be set by the decoder and is
3094 * authoritative. ass and pict fields may contain approximations.
3095 */
3096 SUBTITLE_TEXT,
3097
3098 /**
3099 * Formatted text, the ass field must be set by the decoder and is
3100 * authoritative. pict and text fields may contain approximations.
3101 */
3102 SUBTITLE_ASS,
3103};
3104
85f67c48
JS
3105#define AV_SUBTITLE_FLAG_FORCED 0x00000001
3106
c6ec28b1 3107typedef struct AVSubtitleRect {
ebc466bb
MN
3108 int x; ///< top left corner of pict, undefined when pict is not set
3109 int y; ///< top left corner of pict, undefined when pict is not set
3110 int w; ///< width of pict, undefined when pict is not set
3111 int h; ///< height of pict, undefined when pict is not set
3112 int nb_colors; ///< number of colors in pict, undefined when pict is not set
25b4c651
MN
3113
3114 /**
3115 * data+linesize for the bitmap of this subtitle.
3116 * can be set for text/ass as well once they where rendered
3117 */
3118 AVPicture pict;
f656106f
MN
3119 enum AVSubtitleType type;
3120
3121 char *text; ///< 0 terminated plain UTF-8 text
3122
3123 /**
3124 * 0 terminated ASS/SSA compatible event line.
3125 * The pressentation of this is unaffected by the other values in this
3126 * struct.
3127 */
3128 char *ass;
85f67c48 3129 int flags;
c6ec28b1
MN
3130} AVSubtitleRect;
3131
3132typedef struct AVSubtitle {
3133 uint16_t format; /* 0 = graphics */
3134 uint32_t start_display_time; /* relative to packet pts, in ms */
3135 uint32_t end_display_time; /* relative to packet pts, in ms */
ebc466bb 3136 unsigned num_rects;
db4fac64 3137 AVSubtitleRect **rects;
4bbe788a 3138 int64_t pts; ///< Same as packet pts, in AV_TIME_BASE
240c1657
FB
3139} AVSubtitle;
3140
294b3a50
AK
3141/**
3142 * If c is NULL, returns the first registered codec,
3143 * if c is non-NULL, returns the next registered codec after c,
3144 * or NULL if c is the last one.
3145 */
0a0f19b5 3146AVCodec *av_codec_next(const AVCodec *c);
294b3a50
AK
3147
3148/**
3149 * Return the LIBAVCODEC_VERSION_INT constant.
3150 */
3151unsigned avcodec_version(void);
3152
3153/**
3154 * Return the libavcodec build-time configuration.
3155 */
3156const char *avcodec_configuration(void);
3157
3158/**
3159 * Return the libavcodec license.
3160 */
3161const char *avcodec_license(void);
3162
3163/**
3164 * Register the codec codec and initialize libavcodec.
3165 *
3166 * @warning either this function or avcodec_register_all() must be called
3167 * before any other libavcodec functions.
3168 *
3169 * @see avcodec_register_all()
3170 */
3171void avcodec_register(AVCodec *codec);
3172
3173/**
3174 * Register all the codecs, parsers and bitstream filters which were enabled at
3175 * configuration time. If you do not call this function you can select exactly
3176 * which formats you want to support, by using the individual registration
3177 * functions.
3178 *
3179 * @see avcodec_register
3180 * @see av_register_codec_parser
3181 * @see av_register_bitstream_filter
3182 */
3183void avcodec_register_all(void);
3184
3185/**
fd056029
AK
3186 * Allocate an AVCodecContext and set its fields to default values. The
3187 * resulting struct should be freed with avcodec_free_context().
294b3a50
AK
3188 *
3189 * @param codec if non-NULL, allocate private data and initialize defaults
3190 * for the given codec. It is illegal to then call avcodec_open2()
3191 * with a different codec.
3192 * If NULL, then the codec-specific defaults won't be initialized,
3193 * which may result in suboptimal default settings (this is
3194 * important mainly for encoders, e.g. libx264).
3195 *
3196 * @return An AVCodecContext filled with default values or NULL on failure.
3197 * @see avcodec_get_context_defaults
3198 */
0a0f19b5 3199AVCodecContext *avcodec_alloc_context3(const AVCodec *codec);
294b3a50
AK
3200
3201/**
fd056029
AK
3202 * Free the codec context and everything associated with it and write NULL to
3203 * the provided pointer.
3204 */
3205void avcodec_free_context(AVCodecContext **avctx);
3206
3207/**
294b3a50
AK
3208 * Set the fields of the given AVCodecContext to default values corresponding
3209 * to the given codec (defaults may be codec-dependent).
3210 *
3211 * Do not call this function if a non-NULL codec has been passed
3212 * to avcodec_alloc_context3() that allocated this AVCodecContext.
3213 * If codec is non-NULL, it is illegal to call avcodec_open2() with a
3214 * different codec on this AVCodecContext.
3215 */
0a0f19b5 3216int avcodec_get_context_defaults3(AVCodecContext *s, const AVCodec *codec);
294b3a50
AK
3217
3218/**
3219 * Get the AVClass for AVCodecContext. It can be used in combination with
3220 * AV_OPT_SEARCH_FAKE_OBJ for examining options.
3221 *
3222 * @see av_opt_find().
3223 */
3224const AVClass *avcodec_get_class(void);
3225
3226/**
3227 * Copy the settings of the source AVCodecContext into the destination
3228 * AVCodecContext. The resulting destination codec context will be
3229 * unopened, i.e. you are required to call avcodec_open2() before you
3230 * can use this AVCodecContext to decode/encode video/audio data.
3231 *
3232 * @param dest target codec context, should be initialized with
3233 * avcodec_alloc_context3(), but otherwise uninitialized
3234 * @param src source codec context
3235 * @return AVERROR() on error (e.g. memory allocation error), 0 on success
3236 */
3237int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src);
3238
b9fb59d2 3239#if FF_API_AVFRAME_LAVC
294b3a50 3240/**
b9fb59d2 3241 * @deprecated use av_frame_alloc()
294b3a50 3242 */
b9fb59d2 3243attribute_deprecated
294b3a50
AK
3244AVFrame *avcodec_alloc_frame(void);
3245
3246/**
3247 * Set the fields of the given AVFrame to default values.
3248 *
a83499b1 3249 * @param frame The AVFrame of which the fields should be set to default values.
d7b3ee9a
AK
3250 *
3251 * @deprecated use av_frame_unref()
294b3a50 3252 */
d7b3ee9a 3253attribute_deprecated
a83499b1 3254void avcodec_get_frame_defaults(AVFrame *frame);
294b3a50
AK
3255
3256/**
a42aadab
AK
3257 * Free the frame and any dynamically allocated objects in it,
3258 * e.g. extended_data.
3259 *
3260 * @param frame frame to be freed. The pointer will be set to NULL.
3261 *
3262 * @warning this function does NOT free the data buffers themselves
3263 * (it does not know how, since they might have been allocated with
3264 * a custom get_buffer()).
94313562
AK
3265 *
3266 * @deprecated use av_frame_free()
a42aadab 3267 */
94313562 3268attribute_deprecated
a42aadab 3269void avcodec_free_frame(AVFrame **frame);
94313562 3270#endif
a42aadab
AK
3271
3272/**
294b3a50
AK
3273 * Initialize the AVCodecContext to use the given AVCodec. Prior to using this
3274 * function the context has to be allocated with avcodec_alloc_context3().
3275 *
3276 * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
3277 * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
3278 * retrieving a codec.
3279 *
3280 * @warning This function is not thread safe!