9b386551c901f0fa4dabdec0b99c1825335bfb0c
[libav.git] / libavcodec / avcodec.h
1 /*
2 * copyright (c) 2001 Fabrice Bellard
3 *
4 * This file is part of Libav.
5 *
6 * Libav is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * Libav is distributed in the hope that it will be useful,
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
17 * License along with Libav; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #ifndef AVCODEC_AVCODEC_H
22 #define AVCODEC_AVCODEC_H
23
24 /**
25 * @file
26 * @ingroup libavc
27 * Libavcodec external API header
28 */
29
30 #include <errno.h>
31 #include "libavutil/samplefmt.h"
32 #include "libavutil/attributes.h"
33 #include "libavutil/avutil.h"
34 #include "libavutil/buffer.h"
35 #include "libavutil/cpu.h"
36 #include "libavutil/dict.h"
37 #include "libavutil/frame.h"
38 #include "libavutil/log.h"
39 #include "libavutil/pixfmt.h"
40 #include "libavutil/rational.h"
41
42 #include "version.h"
43
44 #if FF_API_FAST_MALLOC
45 // to provide fast_*alloc
46 #include "libavutil/mem.h"
47 #endif
48
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
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 */
88
89
90 /**
91 * Identify the syntax and semantics of the bitstream.
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.
97 *
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.
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.
104 */
105 enum AVCodecID {
106 AV_CODEC_ID_NONE,
107
108 /* video codecs */
109 AV_CODEC_ID_MPEG1VIDEO,
110 AV_CODEC_ID_MPEG2VIDEO, ///< preferred ID for MPEG-1/2 video decoding
111 #if FF_API_XVMC
112 AV_CODEC_ID_MPEG2VIDEO_XVMC,
113 #endif /* FF_API_XVMC */
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,
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,
278 AV_CODEC_ID_MSS2,
279 AV_CODEC_ID_VP9,
280 AV_CODEC_ID_AIC,
281 AV_CODEC_ID_ESCAPE130,
282 AV_CODEC_ID_G2M,
283 AV_CODEC_ID_WEBP,
284 AV_CODEC_ID_HNM4_VIDEO,
285 AV_CODEC_ID_HEVC,
286 AV_CODEC_ID_FIC,
287 AV_CODEC_ID_ALIAS_PIX,
288 AV_CODEC_ID_BRENDER_PIX,
289 AV_CODEC_ID_PAF_VIDEO,
290 AV_CODEC_ID_EXR,
291 AV_CODEC_ID_VP7,
292 AV_CODEC_ID_SANM,
293 AV_CODEC_ID_SGIRLE,
294 AV_CODEC_ID_MVC1,
295 AV_CODEC_ID_MVC2,
296 AV_CODEC_ID_HQX,
297 AV_CODEC_ID_TDSC,
298 AV_CODEC_ID_HQ_HQA,
299 AV_CODEC_ID_HAP,
300 AV_CODEC_ID_DDS,
301 AV_CODEC_ID_DXV,
302
303 /* various PCM "codecs" */
304 AV_CODEC_ID_FIRST_AUDIO = 0x10000, ///< A dummy id pointing at the start of audio codecs
305 AV_CODEC_ID_PCM_S16LE = 0x10000,
306 AV_CODEC_ID_PCM_S16BE,
307 AV_CODEC_ID_PCM_U16LE,
308 AV_CODEC_ID_PCM_U16BE,
309 AV_CODEC_ID_PCM_S8,
310 AV_CODEC_ID_PCM_U8,
311 AV_CODEC_ID_PCM_MULAW,
312 AV_CODEC_ID_PCM_ALAW,
313 AV_CODEC_ID_PCM_S32LE,
314 AV_CODEC_ID_PCM_S32BE,
315 AV_CODEC_ID_PCM_U32LE,
316 AV_CODEC_ID_PCM_U32BE,
317 AV_CODEC_ID_PCM_S24LE,
318 AV_CODEC_ID_PCM_S24BE,
319 AV_CODEC_ID_PCM_U24LE,
320 AV_CODEC_ID_PCM_U24BE,
321 AV_CODEC_ID_PCM_S24DAUD,
322 AV_CODEC_ID_PCM_ZORK,
323 AV_CODEC_ID_PCM_S16LE_PLANAR,
324 AV_CODEC_ID_PCM_DVD,
325 AV_CODEC_ID_PCM_F32BE,
326 AV_CODEC_ID_PCM_F32LE,
327 AV_CODEC_ID_PCM_F64BE,
328 AV_CODEC_ID_PCM_F64LE,
329 AV_CODEC_ID_PCM_BLURAY,
330 AV_CODEC_ID_PCM_LXF,
331 AV_CODEC_ID_S302M,
332 AV_CODEC_ID_PCM_S8_PLANAR,
333 AV_CODEC_ID_PCM_S24LE_PLANAR,
334 AV_CODEC_ID_PCM_S32LE_PLANAR,
335 AV_CODEC_ID_PCM_S16BE_PLANAR,
336
337 /* various ADPCM codecs */
338 AV_CODEC_ID_ADPCM_IMA_QT = 0x11000,
339 AV_CODEC_ID_ADPCM_IMA_WAV,
340 AV_CODEC_ID_ADPCM_IMA_DK3,
341 AV_CODEC_ID_ADPCM_IMA_DK4,
342 AV_CODEC_ID_ADPCM_IMA_WS,
343 AV_CODEC_ID_ADPCM_IMA_SMJPEG,
344 AV_CODEC_ID_ADPCM_MS,
345 AV_CODEC_ID_ADPCM_4XM,
346 AV_CODEC_ID_ADPCM_XA,
347 AV_CODEC_ID_ADPCM_ADX,
348 AV_CODEC_ID_ADPCM_EA,
349 AV_CODEC_ID_ADPCM_G726,
350 AV_CODEC_ID_ADPCM_CT,
351 AV_CODEC_ID_ADPCM_SWF,
352 AV_CODEC_ID_ADPCM_YAMAHA,
353 AV_CODEC_ID_ADPCM_SBPRO_4,
354 AV_CODEC_ID_ADPCM_SBPRO_3,
355 AV_CODEC_ID_ADPCM_SBPRO_2,
356 AV_CODEC_ID_ADPCM_THP,
357 AV_CODEC_ID_ADPCM_IMA_AMV,
358 AV_CODEC_ID_ADPCM_EA_R1,
359 AV_CODEC_ID_ADPCM_EA_R3,
360 AV_CODEC_ID_ADPCM_EA_R2,
361 AV_CODEC_ID_ADPCM_IMA_EA_SEAD,
362 AV_CODEC_ID_ADPCM_IMA_EA_EACS,
363 AV_CODEC_ID_ADPCM_EA_XAS,
364 AV_CODEC_ID_ADPCM_EA_MAXIS_XA,
365 AV_CODEC_ID_ADPCM_IMA_ISS,
366 AV_CODEC_ID_ADPCM_G722,
367 AV_CODEC_ID_ADPCM_IMA_APC,
368 AV_CODEC_ID_ADPCM_VIMA,
369
370 /* AMR */
371 AV_CODEC_ID_AMR_NB = 0x12000,
372 AV_CODEC_ID_AMR_WB,
373
374 /* RealAudio codecs*/
375 AV_CODEC_ID_RA_144 = 0x13000,
376 AV_CODEC_ID_RA_288,
377
378 /* various DPCM codecs */
379 AV_CODEC_ID_ROQ_DPCM = 0x14000,
380 AV_CODEC_ID_INTERPLAY_DPCM,
381 AV_CODEC_ID_XAN_DPCM,
382 AV_CODEC_ID_SOL_DPCM,
383
384 /* audio codecs */
385 AV_CODEC_ID_MP2 = 0x15000,
386 AV_CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3
387 AV_CODEC_ID_AAC,
388 AV_CODEC_ID_AC3,
389 AV_CODEC_ID_DTS,
390 AV_CODEC_ID_VORBIS,
391 AV_CODEC_ID_DVAUDIO,
392 AV_CODEC_ID_WMAV1,
393 AV_CODEC_ID_WMAV2,
394 AV_CODEC_ID_MACE3,
395 AV_CODEC_ID_MACE6,
396 AV_CODEC_ID_VMDAUDIO,
397 AV_CODEC_ID_FLAC,
398 AV_CODEC_ID_MP3ADU,
399 AV_CODEC_ID_MP3ON4,
400 AV_CODEC_ID_SHORTEN,
401 AV_CODEC_ID_ALAC,
402 AV_CODEC_ID_WESTWOOD_SND1,
403 AV_CODEC_ID_GSM, ///< as in Berlin toast format
404 AV_CODEC_ID_QDM2,
405 AV_CODEC_ID_COOK,
406 AV_CODEC_ID_TRUESPEECH,
407 AV_CODEC_ID_TTA,
408 AV_CODEC_ID_SMACKAUDIO,
409 AV_CODEC_ID_QCELP,
410 AV_CODEC_ID_WAVPACK,
411 AV_CODEC_ID_DSICINAUDIO,
412 AV_CODEC_ID_IMC,
413 AV_CODEC_ID_MUSEPACK7,
414 AV_CODEC_ID_MLP,
415 AV_CODEC_ID_GSM_MS, /* as found in WAV */
416 AV_CODEC_ID_ATRAC3,
417 #if FF_API_VOXWARE
418 AV_CODEC_ID_VOXWARE,
419 #endif
420 AV_CODEC_ID_APE,
421 AV_CODEC_ID_NELLYMOSER,
422 AV_CODEC_ID_MUSEPACK8,
423 AV_CODEC_ID_SPEEX,
424 AV_CODEC_ID_WMAVOICE,
425 AV_CODEC_ID_WMAPRO,
426 AV_CODEC_ID_WMALOSSLESS,
427 AV_CODEC_ID_ATRAC3P,
428 AV_CODEC_ID_EAC3,
429 AV_CODEC_ID_SIPR,
430 AV_CODEC_ID_MP1,
431 AV_CODEC_ID_TWINVQ,
432 AV_CODEC_ID_TRUEHD,
433 AV_CODEC_ID_MP4ALS,
434 AV_CODEC_ID_ATRAC1,
435 AV_CODEC_ID_BINKAUDIO_RDFT,
436 AV_CODEC_ID_BINKAUDIO_DCT,
437 AV_CODEC_ID_AAC_LATM,
438 AV_CODEC_ID_QDMC,
439 AV_CODEC_ID_CELT,
440 AV_CODEC_ID_G723_1,
441 AV_CODEC_ID_G729,
442 AV_CODEC_ID_8SVX_EXP,
443 AV_CODEC_ID_8SVX_FIB,
444 AV_CODEC_ID_BMV_AUDIO,
445 AV_CODEC_ID_RALF,
446 AV_CODEC_ID_IAC,
447 AV_CODEC_ID_ILBC,
448 AV_CODEC_ID_OPUS,
449 AV_CODEC_ID_COMFORT_NOISE,
450 AV_CODEC_ID_TAK,
451 AV_CODEC_ID_METASOUND,
452 AV_CODEC_ID_PAF_AUDIO,
453 AV_CODEC_ID_ON2AVC,
454 AV_CODEC_ID_DSS_SP,
455
456 /* subtitle codecs */
457 AV_CODEC_ID_FIRST_SUBTITLE = 0x17000, ///< A dummy ID pointing at the start of subtitle codecs.
458 AV_CODEC_ID_DVD_SUBTITLE = 0x17000,
459 AV_CODEC_ID_DVB_SUBTITLE,
460 AV_CODEC_ID_TEXT, ///< raw UTF-8 text
461 AV_CODEC_ID_XSUB,
462 AV_CODEC_ID_SSA,
463 AV_CODEC_ID_MOV_TEXT,
464 AV_CODEC_ID_HDMV_PGS_SUBTITLE,
465 AV_CODEC_ID_DVB_TELETEXT,
466 AV_CODEC_ID_SRT,
467
468 /* other specific kind of codecs (generally used for attachments) */
469 AV_CODEC_ID_FIRST_UNKNOWN = 0x18000, ///< A dummy ID pointing at the start of various fake codecs.
470 AV_CODEC_ID_TTF = 0x18000,
471
472 AV_CODEC_ID_PROBE = 0x19000, ///< codec_id is not known (like AV_CODEC_ID_NONE) but lavf should attempt to identify it
473
474 AV_CODEC_ID_MPEG2TS = 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS
475 * stream (only used by libavformat) */
476 AV_CODEC_ID_MPEG4SYSTEMS = 0x20001, /**< _FAKE_ codec to indicate a MPEG-4 Systems
477 * stream (only used by libavformat) */
478 AV_CODEC_ID_FFMETADATA = 0x21000, ///< Dummy codec for streams containing only metadata information.
479 };
480
481 /**
482 * This struct describes the properties of a single codec described by an
483 * AVCodecID.
484 * @see avcodec_descriptor_get()
485 */
486 typedef struct AVCodecDescriptor {
487 enum AVCodecID id;
488 enum AVMediaType type;
489 /**
490 * Name of the codec described by this descriptor. It is non-empty and
491 * unique for each codec descriptor. It should contain alphanumeric
492 * characters and '_' only.
493 */
494 const char *name;
495 /**
496 * A more descriptive name for this codec. May be NULL.
497 */
498 const char *long_name;
499 /**
500 * Codec properties, a combination of AV_CODEC_PROP_* flags.
501 */
502 int props;
503 } AVCodecDescriptor;
504
505 /**
506 * Codec uses only intra compression.
507 * Video codecs only.
508 */
509 #define AV_CODEC_PROP_INTRA_ONLY (1 << 0)
510 /**
511 * Codec supports lossy compression. Audio and video codecs only.
512 * @note a codec may support both lossy and lossless
513 * compression modes
514 */
515 #define AV_CODEC_PROP_LOSSY (1 << 1)
516 /**
517 * Codec supports lossless compression. Audio and video codecs only.
518 */
519 #define AV_CODEC_PROP_LOSSLESS (1 << 2)
520 /**
521 * Codec supports frame reordering. That is, the coded order (the order in which
522 * the encoded packets are output by the encoders / stored / input to the
523 * decoders) may be different from the presentation order of the corresponding
524 * frames.
525 *
526 * For codecs that do not have this property set, PTS and DTS should always be
527 * equal.
528 */
529 #define AV_CODEC_PROP_REORDER (1 << 3)
530
531 /**
532 * @ingroup lavc_decoding
533 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
534 * This is mainly needed because some optimized bitstream readers read
535 * 32 or 64 bit at once and could read over the end.<br>
536 * Note: If the first 23 bits of the additional bytes are not 0, then damaged
537 * MPEG bitstreams could cause overread and segfault.
538 */
539 #define AV_INPUT_BUFFER_PADDING_SIZE 8
540
541 /**
542 * @ingroup lavc_encoding
543 * minimum encoding buffer size
544 * Used to avoid some checks during header writing.
545 */
546 #define AV_INPUT_BUFFER_MIN_SIZE 16384
547
548 #if FF_API_WITHOUT_PREFIX
549 /**
550 * @deprecated use AV_INPUT_BUFFER_PADDING_SIZE instead
551 */
552 #define FF_INPUT_BUFFER_PADDING_SIZE 8
553
554 /**
555 * @deprecated use AV_INPUT_BUFFER_MIN_SIZE instead
556 */
557 #define FF_MIN_BUFFER_SIZE 16384
558 #endif /* FF_API_WITHOUT_PREFIX */
559
560 /**
561 * @ingroup lavc_encoding
562 * motion estimation type.
563 * @deprecated use codec private option instead
564 */
565 #if FF_API_MOTION_EST
566 enum Motion_Est_ID {
567 ME_ZERO = 1, ///< no search, that is use 0,0 vector whenever one is needed
568 ME_FULL,
569 ME_LOG,
570 ME_PHODS,
571 ME_EPZS, ///< enhanced predictive zonal search
572 ME_X1, ///< reserved for experiments
573 ME_HEX, ///< hexagon based search
574 ME_UMH, ///< uneven multi-hexagon search
575 ME_TESA, ///< transformed exhaustive search algorithm
576 };
577 #endif
578
579 /**
580 * @ingroup lavc_decoding
581 */
582 enum AVDiscard{
583 /* We leave some space between them for extensions (drop some
584 * keyframes for intra-only or drop just some bidir frames). */
585 AVDISCARD_NONE =-16, ///< discard nothing
586 AVDISCARD_DEFAULT = 0, ///< discard useless packets like 0 size packets in avi
587 AVDISCARD_NONREF = 8, ///< discard all non reference
588 AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
589 AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
590 AVDISCARD_ALL = 48, ///< discard all
591 };
592
593 enum AVAudioServiceType {
594 AV_AUDIO_SERVICE_TYPE_MAIN = 0,
595 AV_AUDIO_SERVICE_TYPE_EFFECTS = 1,
596 AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED = 2,
597 AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED = 3,
598 AV_AUDIO_SERVICE_TYPE_DIALOGUE = 4,
599 AV_AUDIO_SERVICE_TYPE_COMMENTARY = 5,
600 AV_AUDIO_SERVICE_TYPE_EMERGENCY = 6,
601 AV_AUDIO_SERVICE_TYPE_VOICE_OVER = 7,
602 AV_AUDIO_SERVICE_TYPE_KARAOKE = 8,
603 AV_AUDIO_SERVICE_TYPE_NB , ///< Not part of ABI
604 };
605
606 /**
607 * @ingroup lavc_encoding
608 */
609 typedef struct RcOverride{
610 int start_frame;
611 int end_frame;
612 int qscale; // If this is 0 then quality_factor will be used instead.
613 float quality_factor;
614 } RcOverride;
615
616 #if FF_API_MAX_BFRAMES
617 /**
618 * @deprecated there is no libavcodec-wide limit on the number of B-frames
619 */
620 #define FF_MAX_B_FRAMES 16
621 #endif
622
623 /* encoding support
624 These flags can be passed in AVCodecContext.flags before initialization.
625 Note: Not everything is supported yet.
626 */
627
628 /**
629 * Allow decoders to produce frames with data planes that are not aligned
630 * to CPU requirements (e.g. due to cropping).
631 */
632 #define AV_CODEC_FLAG_UNALIGNED (1 << 0)
633 /**
634 * Use fixed qscale.
635 */
636 #define AV_CODEC_FLAG_QSCALE (1 << 1)
637 /**
638 * 4 MV per MB allowed / advanced prediction for H.263.
639 */
640 #define AV_CODEC_FLAG_4MV (1 << 2)
641 /**
642 * Output even those frames that might be corrupted.
643 */
644 #define AV_CODEC_FLAG_OUTPUT_CORRUPT (1 << 3)
645 /**
646 * Use qpel MC.
647 */
648 #define AV_CODEC_FLAG_QPEL (1 << 4)
649 /**
650 * Use internal 2pass ratecontrol in first pass mode.
651 */
652 #define AV_CODEC_FLAG_PASS1 (1 << 9)
653 /**
654 * Use internal 2pass ratecontrol in second pass mode.
655 */
656 #define AV_CODEC_FLAG_PASS2 (1 << 10)
657 /**
658 * loop filter.
659 */
660 #define AV_CODEC_FLAG_LOOP_FILTER (1 << 11)
661 /**
662 * Only decode/encode grayscale.
663 */
664 #define AV_CODEC_FLAG_GRAY (1 << 13)
665 /**
666 * error[?] variables will be set during encoding.
667 */
668 #define AV_CODEC_FLAG_PSNR (1 << 15)
669 /**
670 * Input bitstream might be truncated at a random location
671 * instead of only at frame boundaries.
672 */
673 #define AV_CODEC_FLAG_TRUNCATED (1 << 16)
674 /**
675 * Use interlaced DCT.
676 */
677 #define AV_CODEC_FLAG_INTERLACED_DCT (1 << 18)
678 /**
679 * Force low delay.
680 */
681 #define AV_CODEC_FLAG_LOW_DELAY (1 << 19)
682 /**
683 * Place global headers in extradata instead of every keyframe.
684 */
685 #define AV_CODEC_FLAG_GLOBAL_HEADER (1 << 22)
686 /**
687 * Use only bitexact stuff (except (I)DCT).
688 */
689 #define AV_CODEC_FLAG_BITEXACT (1 << 23)
690 /* Fx : Flag for h263+ extra options */
691 /**
692 * H.263 advanced intra coding / MPEG-4 AC prediction
693 */
694 #define AV_CODEC_FLAG_AC_PRED (1 << 24)
695 /**
696 * interlaced motion estimation
697 */
698 #define AV_CODEC_FLAG_INTERLACED_ME (1 << 29)
699 /**
700 * Allow non spec compliant speedup tricks.
701 */
702 #define AV_CODEC_FLAG_CLOSED_GOP (1 << 31)
703
704 #define AV_CODEC_FLAG2_FAST (1 << 0)
705 /**
706 * Skip bitstream encoding.
707 */
708 #define AV_CODEC_FLAG2_NO_OUTPUT (1 << 2)
709 /**
710 * Place global headers at every keyframe instead of in extradata.
711 */
712 #define AV_CODEC_FLAG2_LOCAL_HEADER (1 << 3)
713 /**
714 * Input bitstream might be truncated at a packet boundaries
715 * instead of only at frame boundaries.
716 */
717 #define AV_CODEC_FLAG2_CHUNKS (1 << 15)
718 /**
719 * Discard cropping information from SPS.
720 */
721 #define AV_CODEC_FLAG2_IGNORE_CROP (1 << 16)
722
723 /* Unsupported options :
724 * Syntax Arithmetic coding (SAC)
725 * Reference Picture Selection
726 * Independent Segment Decoding */
727 /* /Fx */
728 /* codec capabilities */
729
730 /**
731 * Decoder can use draw_horiz_band callback.
732 */
733 #define AV_CODEC_CAP_DRAW_HORIZ_BAND (1 << 0)
734 /**
735 * Codec uses get_buffer() for allocating buffers and supports custom allocators.
736 * If not set, it might not use get_buffer() at all or use operations that
737 * assume the buffer was allocated by avcodec_default_get_buffer.
738 */
739 #define AV_CODEC_CAP_DR1 (1 << 1)
740 #define AV_CODEC_CAP_TRUNCATED (1 << 3)
741 /**
742 * Encoder or decoder requires flushing with NULL input at the end in order to
743 * give the complete and correct output.
744 *
745 * NOTE: If this flag is not set, the codec is guaranteed to never be fed with
746 * with NULL data. The user can still send NULL data to the public encode
747 * or decode function, but libavcodec will not pass it along to the codec
748 * unless this flag is set.
749 *
750 * Decoders:
751 * The decoder has a non-zero delay and needs to be fed with avpkt->data=NULL,
752 * avpkt->size=0 at the end to get the delayed data until the decoder no longer
753 * returns frames.
754 *
755 * Encoders:
756 * The encoder needs to be fed with NULL data at the end of encoding until the
757 * encoder no longer returns data.
758 *
759 * NOTE: For encoders implementing the AVCodec.encode2() function, setting this
760 * flag also means that the encoder must set the pts and duration for
761 * each output packet. If this flag is not set, the pts and duration will
762 * be determined by libavcodec from the input frame.
763 */
764 #define AV_CODEC_CAP_DELAY (1 << 5)
765 /**
766 * Codec can be fed a final frame with a smaller size.
767 * This can be used to prevent truncation of the last audio samples.
768 */
769 #define AV_CODEC_CAP_SMALL_LAST_FRAME (1 << 6)
770 /**
771 * Codec can output multiple frames per AVPacket
772 * Normally demuxers return one frame at a time, demuxers which do not do
773 * are connected to a parser to split what they return into proper frames.
774 * This flag is reserved to the very rare category of codecs which have a
775 * bitstream that cannot be split into frames without timeconsuming
776 * operations like full decoding. Demuxers carring such bitstreams thus
777 * may return multiple frames in a packet. This has many disadvantages like
778 * prohibiting stream copy in many cases thus it should only be considered
779 * as a last resort.
780 */
781 #define AV_CODEC_CAP_SUBFRAMES (1 << 8)
782 /**
783 * Codec is experimental and is thus avoided in favor of non experimental
784 * encoders
785 */
786 #define AV_CODEC_CAP_EXPERIMENTAL (1 << 9)
787 /**
788 * Codec should fill in channel configuration and samplerate instead of container
789 */
790 #define AV_CODEC_CAP_CHANNEL_CONF (1 << 10)
791 /**
792 * Codec supports frame-level multithreading.
793 */
794 #define AV_CODEC_CAP_FRAME_THREADS (1 << 12)
795 /**
796 * Codec supports slice-based (or partition-based) multithreading.
797 */
798 #define AV_CODEC_CAP_SLICE_THREADS (1 << 13)
799 /**
800 * Codec supports changed parameters at any point.
801 */
802 #define AV_CODEC_CAP_PARAM_CHANGE (1 << 14)
803 /**
804 * Codec supports avctx->thread_count == 0 (auto).
805 */
806 #define AV_CODEC_CAP_AUTO_THREADS (1 << 15)
807 /**
808 * Audio encoder supports receiving a different number of samples in each call.
809 */
810 #define AV_CODEC_CAP_VARIABLE_FRAME_SIZE (1 << 16)
811
812 #if FF_API_WITHOUT_PREFIX
813 /**
814 * Allow decoders to produce frames with data planes that are not aligned
815 * to CPU requirements (e.g. due to cropping).
816 */
817 #define CODEC_FLAG_UNALIGNED 0x0001
818 #define CODEC_FLAG_QSCALE 0x0002 ///< Use fixed qscale.
819 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / advanced prediction for H.263.
820 #define CODEC_FLAG_OUTPUT_CORRUPT 0x0008 ///< Output even those frames that might be corrupted
821 #define CODEC_FLAG_QPEL 0x0010 ///< Use qpel MC.
822 #if FF_API_GMC
823 /**
824 * @deprecated use the "gmc" private option of the libxvid encoder
825 */
826 #define CODEC_FLAG_GMC 0x0020 ///< Use GMC.
827 #endif
828 #if FF_API_MV0
829 /**
830 * @deprecated use the flag "mv0" in the "mpv_flags" private option of the
831 * mpegvideo encoders
832 */
833 #define CODEC_FLAG_MV0 0x0040
834 #endif
835 #if FF_API_INPUT_PRESERVED
836 /**
837 * @deprecated passing reference-counted frames to the encoders replaces this
838 * flag
839 */
840 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
841 #endif
842 #define CODEC_FLAG_PASS1 0x0200 ///< Use internal 2pass ratecontrol in first pass mode.
843 #define CODEC_FLAG_PASS2 0x0400 ///< Use internal 2pass ratecontrol in second pass mode.
844 #define CODEC_FLAG_GRAY 0x2000 ///< Only decode/encode grayscale.
845 #if FF_API_EMU_EDGE
846 /**
847 * @deprecated edges are not used/required anymore. I.e. this flag is now always
848 * set.
849 */
850 #define CODEC_FLAG_EMU_EDGE 0x4000
851 #endif
852 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding.
853 #define CODEC_FLAG_TRUNCATED 0x00010000 /** Input bitstream might be truncated at a random
854 location instead of only at frame boundaries. */
855 #if FF_API_NORMALIZE_AQP
856 /**
857 * @deprecated use the flag "naq" in the "mpv_flags" private option of the
858 * mpegvideo encoders
859 */
860 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000
861 #endif
862 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT.
863 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< Force low delay.
864 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< Place global headers in extradata instead of every keyframe.
865 #define CODEC_FLAG_BITEXACT 0x00800000 ///< Use only bitexact stuff (except (I)DCT).
866 /* Fx : Flag for h263+ extra options */
867 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction
868 #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
869 #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
870 #define CODEC_FLAG_CLOSED_GOP 0x80000000
871 #define CODEC_FLAG2_FAST 0x00000001 ///< Allow non spec compliant speedup tricks.
872 #define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< Skip bitstream encoding.
873 #define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< Place global headers at every keyframe instead of in extradata.
874 #define CODEC_FLAG2_IGNORE_CROP 0x00010000 ///< Discard cropping information from SPS.
875
876 #define CODEC_FLAG2_CHUNKS 0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
877
878 /* Unsupported options :
879 * Syntax Arithmetic coding (SAC)
880 * Reference Picture Selection
881 * Independent Segment Decoding */
882 /* /Fx */
883 /* codec capabilities */
884
885 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback.
886 /**
887 * Codec uses get_buffer() for allocating buffers and supports custom allocators.
888 * If not set, it might not use get_buffer() at all or use operations that
889 * assume the buffer was allocated by avcodec_default_get_buffer.
890 */
891 #define CODEC_CAP_DR1 0x0002
892 #define CODEC_CAP_TRUNCATED 0x0008
893 #if FF_API_XVMC
894 /* Codec can export data for HW decoding (XvMC). */
895 #define CODEC_CAP_HWACCEL 0x0010
896 #endif /* FF_API_XVMC */
897 /**
898 * Encoder or decoder requires flushing with NULL input at the end in order to
899 * give the complete and correct output.
900 *
901 * NOTE: If this flag is not set, the codec is guaranteed to never be fed with
902 * with NULL data. The user can still send NULL data to the public encode
903 * or decode function, but libavcodec will not pass it along to the codec
904 * unless this flag is set.
905 *
906 * Decoders:
907 * The decoder has a non-zero delay and needs to be fed with avpkt->data=NULL,
908 * avpkt->size=0 at the end to get the delayed data until the decoder no longer
909 * returns frames.
910 *
911 * Encoders:
912 * The encoder needs to be fed with NULL data at the end of encoding until the
913 * encoder no longer returns data.
914 *
915 * NOTE: For encoders implementing the AVCodec.encode2() function, setting this
916 * flag also means that the encoder must set the pts and duration for
917 * each output packet. If this flag is not set, the pts and duration will
918 * be determined by libavcodec from the input frame.
919 */
920 #define CODEC_CAP_DELAY 0x0020
921 /**
922 * Codec can be fed a final frame with a smaller size.
923 * This can be used to prevent truncation of the last audio samples.
924 */
925 #define CODEC_CAP_SMALL_LAST_FRAME 0x0040
926 #if FF_API_CAP_VDPAU
927 /**
928 * Codec can export data for HW decoding (VDPAU).
929 */
930 #define CODEC_CAP_HWACCEL_VDPAU 0x0080
931 #endif
932 /**
933 * Codec can output multiple frames per AVPacket
934 * Normally demuxers return one frame at a time, demuxers which do not do
935 * are connected to a parser to split what they return into proper frames.
936 * This flag is reserved to the very rare category of codecs which have a
937 * bitstream that cannot be split into frames without timeconsuming
938 * operations like full decoding. Demuxers carring such bitstreams thus
939 * may return multiple frames in a packet. This has many disadvantages like
940 * prohibiting stream copy in many cases thus it should only be considered
941 * as a last resort.
942 */
943 #define CODEC_CAP_SUBFRAMES 0x0100
944 /**
945 * Codec is experimental and is thus avoided in favor of non experimental
946 * encoders
947 */
948 #define CODEC_CAP_EXPERIMENTAL 0x0200
949 /**
950 * Codec should fill in channel configuration and samplerate instead of container
951 */
952 #define CODEC_CAP_CHANNEL_CONF 0x0400
953 #if FF_API_NEG_LINESIZES
954 /**
955 * @deprecated no codecs use this capability
956 */
957 #define CODEC_CAP_NEG_LINESIZES 0x0800
958 #endif
959 /**
960 * Codec supports frame-level multithreading.
961 */
962 #define CODEC_CAP_FRAME_THREADS 0x1000
963 /**
964 * Codec supports slice-based (or partition-based) multithreading.
965 */
966 #define CODEC_CAP_SLICE_THREADS 0x2000
967 /**
968 * Codec supports changed parameters at any point.
969 */
970 #define CODEC_CAP_PARAM_CHANGE 0x4000
971 /**
972 * Codec supports avctx->thread_count == 0 (auto).
973 */
974 #define CODEC_CAP_AUTO_THREADS 0x8000
975 /**
976 * Audio encoder supports receiving a different number of samples in each call.
977 */
978 #define CODEC_CAP_VARIABLE_FRAME_SIZE 0x10000
979 #endif /* FF_API_WITHOUT_PREFIX */
980
981 #if FF_API_MB_TYPE
982 //The following defines may change, don't expect compatibility if you use them.
983 #define MB_TYPE_INTRA4x4 0x0001
984 #define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
985 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME H.264-specific
986 #define MB_TYPE_16x16 0x0008
987 #define MB_TYPE_16x8 0x0010
988 #define MB_TYPE_8x16 0x0020
989 #define MB_TYPE_8x8 0x0040
990 #define MB_TYPE_INTERLACED 0x0080
991 #define MB_TYPE_DIRECT2 0x0100 //FIXME
992 #define MB_TYPE_ACPRED 0x0200
993 #define MB_TYPE_GMC 0x0400
994 #define MB_TYPE_SKIP 0x0800
995 #define MB_TYPE_P0L0 0x1000
996 #define MB_TYPE_P1L0 0x2000
997 #define MB_TYPE_P0L1 0x4000
998 #define MB_TYPE_P1L1 0x8000
999 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
1000 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
1001 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
1002 #define MB_TYPE_QUANT 0x00010000
1003 #define MB_TYPE_CBP 0x00020000
1004 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
1005 #endif
1006
1007 /**
1008 * Pan Scan area.
1009 * This specifies the area which should be displayed.
1010 * Note there may be multiple such areas for one frame.
1011 */
1012 typedef struct AVPanScan{
1013 /**
1014 * id
1015 * - encoding: Set by user.
1016 * - decoding: Set by libavcodec.
1017 */
1018 int id;
1019
1020 /**
1021 * width and height in 1/16 pel
1022 * - encoding: Set by user.
1023 * - decoding: Set by libavcodec.
1024 */
1025 int width;
1026 int height;
1027
1028 /**
1029 * position of the top left corner in 1/16 pel for up to 3 fields/frames
1030 * - encoding: Set by user.
1031 * - decoding: Set by libavcodec.
1032 */
1033 int16_t position[3][2];
1034 }AVPanScan;
1035
1036 #if FF_API_QSCALE_TYPE
1037 #define FF_QSCALE_TYPE_MPEG1 0
1038 #define FF_QSCALE_TYPE_MPEG2 1
1039 #define FF_QSCALE_TYPE_H264 2
1040 #define FF_QSCALE_TYPE_VP56 3
1041 #endif
1042
1043 /**
1044 * The decoder will keep a reference to the frame and may reuse it later.
1045 */
1046 #define AV_GET_BUFFER_FLAG_REF (1 << 0)
1047
1048 /**
1049 * @defgroup lavc_packet AVPacket
1050 *
1051 * Types and functions for working with AVPacket.
1052 * @{
1053 */
1054 enum AVPacketSideDataType {
1055 AV_PKT_DATA_PALETTE,
1056 AV_PKT_DATA_NEW_EXTRADATA,
1057
1058 /**
1059 * An AV_PKT_DATA_PARAM_CHANGE side data packet is laid out as follows:
1060 * @code
1061 * u32le param_flags
1062 * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT)
1063 * s32le channel_count
1064 * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT)
1065 * u64le channel_layout
1066 * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE)
1067 * s32le sample_rate
1068 * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS)
1069 * s32le width
1070 * s32le height
1071 * @endcode
1072 */
1073 AV_PKT_DATA_PARAM_CHANGE,
1074
1075 /**
1076 * An AV_PKT_DATA_H263_MB_INFO side data packet contains a number of
1077 * structures with info about macroblocks relevant to splitting the
1078 * packet into smaller packets on macroblock edges (e.g. as for RFC 2190).
1079 * That is, it does not necessarily contain info about all macroblocks,
1080 * as long as the distance between macroblocks in the info is smaller
1081 * than the target payload size.
1082 * Each MB info structure is 12 bytes, and is laid out as follows:
1083 * @code
1084 * u32le bit offset from the start of the packet
1085 * u8 current quantizer at the start of the macroblock
1086 * u8 GOB number
1087 * u16le macroblock address within the GOB
1088 * u8 horizontal MV predictor
1089 * u8 vertical MV predictor
1090 * u8 horizontal MV predictor for block number 3
1091 * u8 vertical MV predictor for block number 3
1092 * @endcode
1093 */
1094 AV_PKT_DATA_H263_MB_INFO,
1095
1096 /**
1097 * This side data should be associated with an audio stream and contains
1098 * ReplayGain information in form of the AVReplayGain struct.
1099 */
1100 AV_PKT_DATA_REPLAYGAIN,
1101
1102 /**
1103 * This side data contains a 3x3 transformation matrix describing an affine
1104 * transformation that needs to be applied to the decoded video frames for
1105 * correct presentation.
1106 *
1107 * See libavutil/display.h for a detailed description of the data.
1108 */
1109 AV_PKT_DATA_DISPLAYMATRIX,
1110
1111 /**
1112 * This side data should be associated with a video stream and contains
1113 * Stereoscopic 3D information in form of the AVStereo3D struct.
1114 */
1115 AV_PKT_DATA_STEREO3D,
1116
1117 /**
1118 * This side data should be associated with an audio stream and corresponds
1119 * to enum AVAudioServiceType.
1120 */
1121 AV_PKT_DATA_AUDIO_SERVICE_TYPE,
1122
1123 /**
1124 * This side data contains an integer value representing the quality
1125 * factor of the compressed frame. Allowed range is between 1 (good)
1126 * and FF_LAMBDA_MAX (bad).
1127 */
1128 AV_PKT_DATA_QUALITY_FACTOR,
1129 };
1130
1131 typedef struct AVPacketSideData {
1132 uint8_t *data;
1133 int size;
1134 enum AVPacketSideDataType type;
1135 } AVPacketSideData;
1136
1137 /**
1138 * This structure stores compressed data. It is typically exported by demuxers
1139 * and then passed as input to decoders, or received as output from encoders and
1140 * then passed to muxers.
1141 *
1142 * For video, it should typically contain one compressed frame. For audio it may
1143 * contain several compressed frames.
1144 *
1145 * AVPacket is one of the few structs in Libav, whose size is a part of public
1146 * ABI. Thus it may be allocated on stack and no new fields can be added to it
1147 * without libavcodec and libavformat major bump.
1148 *
1149 * The semantics of data ownership depends on the buf or destruct (deprecated)
1150 * fields. If either is set, the packet data is dynamically allocated and is
1151 * valid indefinitely until av_free_packet() is called (which in turn calls
1152 * av_buffer_unref()/the destruct callback to free the data). If neither is set,
1153 * the packet data is typically backed by some static buffer somewhere and is
1154 * only valid for a limited time (e.g. until the next read call when demuxing).
1155 *
1156 * The side data is always allocated with av_malloc() and is freed in
1157 * av_free_packet().
1158 */
1159 typedef struct AVPacket {
1160 /**
1161 * A reference to the reference-counted buffer where the packet data is
1162 * stored.
1163 * May be NULL, then the packet data is not reference-counted.
1164 */
1165 AVBufferRef *buf;
1166 /**
1167 * Presentation timestamp in AVStream->time_base units; the time at which
1168 * the decompressed packet will be presented to the user.
1169 * Can be AV_NOPTS_VALUE if it is not stored in the file.
1170 * pts MUST be larger or equal to dts as presentation cannot happen before
1171 * decompression, unless one wants to view hex dumps. Some formats misuse
1172 * the terms dts and pts/cts to mean something different. Such timestamps
1173 * must be converted to true pts/dts before they are stored in AVPacket.
1174 */
1175 int64_t pts;
1176 /**
1177 * Decompression timestamp in AVStream->time_base units; the time at which
1178 * the packet is decompressed.
1179 * Can be AV_NOPTS_VALUE if it is not stored in the file.
1180 */
1181 int64_t dts;
1182 uint8_t *data;
1183 int size;
1184 int stream_index;
1185 /**
1186 * A combination of AV_PKT_FLAG values
1187 */
1188 int flags;
1189 /**
1190 * Additional packet data that can be provided by the container.
1191 * Packet can contain several types of side information.
1192 */
1193 AVPacketSideData *side_data;
1194 int side_data_elems;
1195
1196 /**
1197 * Duration of this packet in AVStream->time_base units, 0 if unknown.
1198 * Equals next_pts - this_pts in presentation order.
1199 */
1200 int duration;
1201
1202 int64_t pos; ///< byte position in stream, -1 if unknown
1203
1204 /**
1205 * Time difference in AVStream->time_base units from the pts of this
1206 * packet to the point at which the output from the decoder has converged
1207 * independent from the availability of previous frames. That is, the
1208 * frames are virtually identical no matter if decoding started from
1209 * the very first frame or from this keyframe.
1210 * Is AV_NOPTS_VALUE if unknown.
1211 * This field is not the display duration of the current packet.
1212 * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
1213 * set.
1214 *
1215 * The purpose of this field is to allow seeking in streams that have no
1216 * keyframes in the conventional sense. It corresponds to the
1217 * recovery point SEI in H.264 and match_time_delta in NUT. It is also
1218 * essential for some types of subtitle streams to ensure that all
1219 * subtitles are correctly displayed after seeking.
1220 */
1221 int64_t convergence_duration;
1222 } AVPacket;
1223 #define AV_PKT_FLAG_KEY 0x0001 ///< The packet contains a keyframe
1224 #define AV_PKT_FLAG_CORRUPT 0x0002 ///< The packet content is corrupted
1225
1226 enum AVSideDataParamChangeFlags {
1227 AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT = 0x0001,
1228 AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT = 0x0002,
1229 AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE = 0x0004,
1230 AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS = 0x0008,
1231 };
1232 /**
1233 * @}
1234 */
1235
1236 struct AVCodecInternal;
1237
1238 enum AVFieldOrder {
1239 AV_FIELD_UNKNOWN,
1240 AV_FIELD_PROGRESSIVE,
1241 AV_FIELD_TT, //< Top coded_first, top displayed first
1242 AV_FIELD_BB, //< Bottom coded first, bottom displayed first
1243 AV_FIELD_TB, //< Top coded first, bottom displayed first
1244 AV_FIELD_BT, //< Bottom coded first, top displayed first
1245 };
1246
1247 /**
1248 * main external API structure.
1249 * New fields can be added to the end with minor version bumps.
1250 * Removal, reordering and changes to existing fields require a major
1251 * version bump.
1252 * sizeof(AVCodecContext) must not be used outside libav*.
1253 */
1254 typedef struct AVCodecContext {
1255 /**
1256 * information on struct for av_log
1257 * - set by avcodec_alloc_context3
1258 */
1259 const AVClass *av_class;
1260 int log_level_offset;
1261
1262 enum AVMediaType codec_type; /* see AVMEDIA_TYPE_xxx */
1263 const struct AVCodec *codec;
1264 #if FF_API_CODEC_NAME
1265 /**
1266 * @deprecated this field is not used for anything in libavcodec
1267 */
1268 attribute_deprecated
1269 char codec_name[32];
1270 #endif
1271 enum AVCodecID codec_id; /* see AV_CODEC_ID_xxx */
1272
1273 /**
1274 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1275 * This is used to work around some encoder bugs.
1276 * A demuxer should set this to what is stored in the field used to identify the codec.
1277 * If there are multiple such fields in a container then the demuxer should choose the one
1278 * which maximizes the information about the used codec.
1279 * If the codec tag field in a container is larger than 32 bits then the demuxer should
1280 * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
1281 * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
1282 * first.
1283 * - encoding: Set by user, if not then the default based on codec_id will be used.
1284 * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1285 */
1286 unsigned int codec_tag;
1287
1288 #if FF_API_STREAM_CODEC_TAG
1289 /**
1290 * @deprecated this field is unused
1291 */
1292 attribute_deprecated
1293 unsigned int stream_codec_tag;
1294 #endif
1295
1296 void *priv_data;
1297
1298 /**
1299 * Private context used for internal data.
1300 *
1301 * Unlike priv_data, this is not codec-specific. It is used in general
1302 * libavcodec functions.
1303 */
1304 struct AVCodecInternal *internal;
1305
1306 /**
1307 * Private data of the user, can be used to carry app specific stuff.
1308 * - encoding: Set by user.
1309 * - decoding: Set by user.
1310 */
1311 void *opaque;
1312
1313 /**
1314 * the average bitrate
1315 * - encoding: Set by user; unused for constant quantizer encoding.
1316 * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.
1317 */
1318 int bit_rate;
1319
1320 /**
1321 * number of bits the bitstream is allowed to diverge from the reference.
1322 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
1323 * - encoding: Set by user; unused for constant quantizer encoding.
1324 * - decoding: unused
1325 */
1326 int bit_rate_tolerance;
1327
1328 /**
1329 * Global quality for codecs which cannot change it per frame.
1330 * This should be proportional to MPEG-1/2/4 qscale.
1331 * - encoding: Set by user.
1332 * - decoding: unused
1333 */
1334 int global_quality;
1335
1336 /**
1337 * - encoding: Set by user.
1338 * - decoding: unused
1339 */
1340 int compression_level;
1341 #define FF_COMPRESSION_DEFAULT -1
1342
1343 /**
1344 * AV_CODEC_FLAG_*.
1345 * - encoding: Set by user.
1346 * - decoding: Set by user.
1347 */
1348 int flags;
1349
1350 /**
1351 * AV_CODEC_FLAG2_*
1352 * - encoding: Set by user.
1353 * - decoding: Set by user.
1354 */
1355 int flags2;
1356
1357 /**
1358 * some codecs need / can use extradata like Huffman tables.
1359 * mjpeg: Huffman tables
1360 * rv10: additional flags
1361 * mpeg4: global headers (they can be in the bitstream or here)
1362 * The allocated memory should be AV_INPUT_BUFFER_PADDING_SIZE bytes larger
1363 * than extradata_size to avoid prolems if it is read with the bitstream reader.
1364 * The bytewise contents of extradata must not depend on the architecture or CPU endianness.
1365 * - encoding: Set/allocated/freed by libavcodec.
1366 * - decoding: Set/allocated/freed by user.
1367 */
1368 uint8_t *extradata;
1369 int extradata_size;
1370
1371 /**
1372 * This is the fundamental unit of time (in seconds) in terms
1373 * of which frame timestamps are represented. For fixed-fps content,
1374 * timebase should be 1/framerate and timestamp increments should be
1375 * identically 1.
1376 * - encoding: MUST be set by user.
1377 * - decoding: the use of this field for decoding is deprecated.
1378 * Use framerate instead.
1379 */
1380 AVRational time_base;
1381
1382 /**
1383 * For some codecs, the time base is closer to the field rate than the frame rate.
1384 * Most notably, H.264 and MPEG-2 specify time_base as half of frame duration
1385 * if no telecine is used ...
1386 *
1387 * Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2.
1388 */
1389 int ticks_per_frame;
1390
1391 /**
1392 * Codec delay.
1393 *
1394 * Video:
1395 * Number of frames the decoded output will be delayed relative to the
1396 * encoded input.
1397 *
1398 * Audio:
1399 * For encoding, this field is unused (see initial_padding).
1400 *
1401 * For decoding, this is the number of samples the decoder needs to
1402 * output before the decoder's output is valid. When seeking, you should
1403 * start decoding this many samples prior to your desired seek point.
1404 *
1405 * - encoding: Set by libavcodec.
1406 * - decoding: Set by libavcodec.
1407 */
1408 int delay;
1409
1410
1411 /* video only */
1412 /**
1413 * picture width / height.
1414 *
1415 * @note Those fields may not match the values of the last
1416 * AVFrame outputted by avcodec_decode_video2 due frame
1417 * reordering.
1418 *
1419 * - encoding: MUST be set by user.
1420 * - decoding: May be set by the user before opening the decoder if known e.g.
1421 * from the container. Some decoders will require the dimensions
1422 * to be set by the caller. During decoding, the decoder may
1423 * overwrite those values as required while parsing the data.
1424 */
1425 int width, height;
1426
1427 /**
1428 * Bitstream width / height, may be different from width/height e.g. when
1429 * the decoded frame is cropped before being output.
1430 *
1431 * @note Those field may not match the value of the last
1432 * AVFrame outputted by avcodec_decode_video2 due frame
1433 * reordering.
1434 *
1435 * - encoding: unused
1436 * - decoding: May be set by the user before opening the decoder if known
1437 * e.g. from the container. During decoding, the decoder may
1438 * overwrite those values as required while parsing the data.
1439 */
1440 int coded_width, coded_height;
1441
1442 #if FF_API_ASPECT_EXTENDED
1443 #define FF_ASPECT_EXTENDED 15
1444 #endif
1445
1446 /**
1447 * the number of pictures in a group of pictures, or 0 for intra_only
1448 * - encoding: Set by user.
1449 * - decoding: unused
1450 */
1451 int gop_size;
1452
1453 /**
1454 * Pixel format, see AV_PIX_FMT_xxx.
1455 * May be set by the demuxer if known from headers.
1456 * May be overriden by the decoder if it knows better.
1457 *
1458 * @note This field may not match the value of the last
1459 * AVFrame outputted by avcodec_decode_video2 due frame
1460 * reordering.
1461 *
1462 * - encoding: Set by user.
1463 * - decoding: Set by user if known, overridden by libavcodec while
1464 * parsing the data.
1465 */
1466 enum AVPixelFormat pix_fmt;
1467
1468 #if FF_API_MOTION_EST
1469 /**
1470 * This option does nothing
1471 * @deprecated use codec private options instead
1472 */
1473 attribute_deprecated int me_method;
1474 #endif
1475
1476 /**
1477 * If non NULL, 'draw_horiz_band' is called by the libavcodec
1478 * decoder to draw a horizontal band. It improves cache usage. Not
1479 * all codecs can do that. You must check the codec capabilities
1480 * beforehand.
1481 * When multithreading is used, it may be called from multiple threads
1482 * at the same time; threads might draw different parts of the same AVFrame,
1483 * or multiple AVFrames, and there is no guarantee that slices will be drawn
1484 * in order.
1485 * The function is also used by hardware acceleration APIs.
1486 * It is called at least once during frame decoding to pass
1487 * the data needed for hardware render.
1488 * In that mode instead of pixel data, AVFrame points to
1489 * a structure specific to the acceleration API. The application
1490 * reads the structure and can change some fields to indicate progress
1491 * or mark state.
1492 * - encoding: unused
1493 * - decoding: Set by user.
1494 * @param height the height of the slice
1495 * @param y the y position of the slice
1496 * @param type 1->top field, 2->bottom field, 3->frame
1497 * @param offset offset into the AVFrame.data from which the slice should be read
1498 */
1499 void (*draw_horiz_band)(struct AVCodecContext *s,
1500 const AVFrame *src, int offset[AV_NUM_DATA_POINTERS],
1501 int y, int type, int height);
1502
1503 /**
1504 * callback to negotiate the pixelFormat
1505 * @param fmt is the list of formats which are supported by the codec,
1506 * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
1507 * The first is always the native one.
1508 * @note The callback may be called again immediately if initialization for
1509 * the selected (hardware-accelerated) pixel format failed.
1510 * @warning Behavior is undefined if the callback returns a value not
1511 * in the fmt list of formats.
1512 * @return the chosen format
1513 * - encoding: unused
1514 * - decoding: Set by user, if not set the native format will be chosen.
1515 */
1516 enum AVPixelFormat (*get_format)(struct AVCodecContext *s, const enum AVPixelFormat * fmt);
1517
1518 /**
1519 * maximum number of B-frames between non-B-frames
1520 * Note: The output will be delayed by max_b_frames+1 relative to the input.
1521 * - encoding: Set by user.
1522 * - decoding: unused
1523 */
1524 int max_b_frames;
1525
1526 /**
1527 * qscale factor between IP and B-frames
1528 * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
1529 * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1530 * - encoding: Set by user.
1531 * - decoding: unused
1532 */
1533 float b_quant_factor;
1534
1535 #if FF_API_RC_STRATEGY
1536 /** @deprecated use codec private option instead */
1537 attribute_deprecated int rc_strategy;
1538 #define FF_RC_STRATEGY_XVID 1
1539 #endif
1540
1541 int b_frame_strategy;
1542
1543 /**
1544 * qscale offset between IP and B-frames
1545 * - encoding: Set by user.
1546 * - decoding: unused
1547 */
1548 float b_quant_offset;
1549
1550 /**
1551 * Size of the frame reordering buffer in the decoder.
1552 * For MPEG-2 it is 1 IPB or 0 low delay IP.
1553 * - encoding: Set by libavcodec.
1554 * - decoding: Set by libavcodec.
1555 */
1556 int has_b_frames;
1557
1558 /**
1559 * 0-> h263 quant 1-> mpeg quant
1560 * - encoding: Set by user.
1561 * - decoding: unused
1562 */
1563 int mpeg_quant;
1564
1565 /**
1566 * qscale factor between P and I-frames
1567 * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
1568 * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1569 * - encoding: Set by user.
1570 * - decoding: unused
1571 */
1572 float i_quant_factor;
1573
1574 /**
1575 * qscale offset between P and I-frames
1576 * - encoding: Set by user.
1577 * - decoding: unused
1578 */
1579 float i_quant_offset;
1580
1581 /**
1582 * luminance masking (0-> disabled)
1583 * - encoding: Set by user.
1584 * - decoding: unused
1585 */
1586 float lumi_masking;
1587
1588 /**
1589 * temporary complexity masking (0-> disabled)
1590 * - encoding: Set by user.
1591 * - decoding: unused
1592 */
1593 float temporal_cplx_masking;
1594
1595 /**
1596 * spatial complexity masking (0-> disabled)
1597 * - encoding: Set by user.
1598 * - decoding: unused
1599 */
1600 float spatial_cplx_masking;
1601
1602 /**
1603 * p block masking (0-> disabled)
1604 * - encoding: Set by user.
1605 * - decoding: unused
1606 */
1607 float p_masking;
1608
1609 /**
1610 * darkness masking (0-> disabled)
1611 * - encoding: Set by user.
1612 * - decoding: unused
1613 */
1614 float dark_masking;
1615
1616 /**
1617 * slice count
1618 * - encoding: Set by libavcodec.
1619 * - decoding: Set by user (or 0).
1620 */
1621 int slice_count;
1622 /**
1623 * prediction method (needed for huffyuv)
1624 * - encoding: Set by user.
1625 * - decoding: unused
1626 */
1627 int prediction_method;
1628 #define FF_PRED_LEFT 0
1629 #define FF_PRED_PLANE 1
1630 #define FF_PRED_MEDIAN 2
1631
1632 /**
1633 * slice offsets in the frame in bytes
1634 * - encoding: Set/allocated by libavcodec.
1635 * - decoding: Set/allocated by user (or NULL).
1636 */
1637 int *slice_offset;
1638
1639 /**
1640 * sample aspect ratio (0 if unknown)
1641 * That is the width of a pixel divided by the height of the pixel.
1642 * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
1643 * - encoding: Set by user.
1644 * - decoding: Set by libavcodec.
1645 */
1646 AVRational sample_aspect_ratio;
1647
1648 /**
1649 * motion estimation comparison function
1650 * - encoding: Set by user.
1651 * - decoding: unused
1652 */
1653 int me_cmp;
1654 /**
1655 * subpixel motion estimation comparison function
1656 * - encoding: Set by user.
1657 * - decoding: unused
1658 */
1659 int me_sub_cmp;
1660 /**
1661 * macroblock comparison function (not supported yet)
1662 * - encoding: Set by user.
1663 * - decoding: unused
1664 */
1665 int mb_cmp;
1666 /**
1667 * interlaced DCT comparison function
1668 * - encoding: Set by user.
1669 * - decoding: unused
1670 */
1671 int ildct_cmp;
1672 #define FF_CMP_SAD 0
1673 #define FF_CMP_SSE 1
1674 #define FF_CMP_SATD 2
1675 #define FF_CMP_DCT 3
1676 #define FF_CMP_PSNR 4
1677 #define FF_CMP_BIT 5
1678 #define FF_CMP_RD 6
1679 #define FF_CMP_ZERO 7
1680 #define FF_CMP_VSAD 8
1681 #define FF_CMP_VSSE 9
1682 #define FF_CMP_NSSE 10
1683 #define FF_CMP_DCTMAX 13
1684 #define FF_CMP_DCT264 14
1685 #define FF_CMP_CHROMA 256
1686
1687 /**
1688 * ME diamond size & shape
1689 * - encoding: Set by user.
1690 * - decoding: unused
1691 */
1692 int dia_size;
1693
1694 /**
1695 * amount of previous MV predictors (2a+1 x 2a+1 square)
1696 * - encoding: Set by user.
1697 * - decoding: unused
1698 */
1699 int last_predictor_count;
1700
1701 /**
1702 * prepass for motion estimation
1703 * - encoding: Set by user.
1704 * - decoding: unused
1705 */
1706 int pre_me;
1707
1708 /**
1709 * motion estimation prepass comparison function
1710 * - encoding: Set by user.
1711 * - decoding: unused
1712 */
1713 int me_pre_cmp;
1714
1715 /**
1716 * ME prepass diamond size & shape
1717 * - encoding: Set by user.
1718 * - decoding: unused
1719 */
1720 int pre_dia_size;
1721
1722 /**
1723 * subpel ME quality
1724 * - encoding: Set by user.
1725 * - decoding: unused
1726 */
1727 int me_subpel_quality;
1728
1729 #if FF_API_AFD
1730 /**
1731 * DTG active format information (additional aspect ratio
1732 * information only used in DVB MPEG-2 transport streams)
1733 * 0 if not set.
1734 *
1735 * - encoding: unused
1736 * - decoding: Set by decoder.
1737 * @deprecated Deprecated in favor of AVSideData
1738 */
1739 attribute_deprecated int dtg_active_format;
1740 #define FF_DTG_AFD_SAME 8
1741 #define FF_DTG_AFD_4_3 9
1742 #define FF_DTG_AFD_16_9 10
1743 #define FF_DTG_AFD_14_9 11
1744 #define FF_DTG_AFD_4_3_SP_14_9 13
1745 #define FF_DTG_AFD_16_9_SP_14_9 14
1746 #define FF_DTG_AFD_SP_4_3 15
1747 #endif /* FF_API_AFD */
1748
1749 /**
1750 * maximum motion estimation search range in subpel units
1751 * If 0 then no limit.
1752 *
1753 * - encoding: Set by user.
1754 * - decoding: unused
1755 */
1756 int me_range;
1757
1758 #if FF_API_QUANT_BIAS
1759 /**
1760 * @deprecated use encoder private option instead
1761 */
1762 attribute_deprecated int intra_quant_bias;
1763 #define FF_DEFAULT_QUANT_BIAS 999999
1764
1765 /**
1766 * @deprecated use encoder private option instead
1767 */
1768 attribute_deprecated int inter_quant_bias;
1769 #endif
1770
1771 /**
1772 * slice flags
1773 * - encoding: unused
1774 * - decoding: Set by user.
1775 */
1776 int slice_flags;
1777 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1778 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1779 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1780
1781 #if FF_API_XVMC
1782 /**
1783 * XVideo Motion Acceleration
1784 * - encoding: forbidden
1785 * - decoding: set by decoder
1786 * @deprecated XvMC support is slated for removal.
1787 */
1788 attribute_deprecated int xvmc_acceleration;
1789 #endif /* FF_API_XVMC */
1790
1791 /**
1792 * macroblock decision mode
1793 * - encoding: Set by user.
1794 * - decoding: unused
1795 */
1796 int mb_decision;
1797 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1798 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1799 #define FF_MB_DECISION_RD 2 ///< rate distortion
1800
1801 /**
1802 * custom intra quantization matrix
1803 * - encoding: Set by user, can be NULL.
1804 * - decoding: Set by libavcodec.
1805 */
1806 uint16_t *intra_matrix;
1807
1808 /**
1809 * custom inter quantization matrix
1810 * - encoding: Set by user, can be NULL.
1811 * - decoding: Set by libavcodec.
1812 */
1813 uint16_t *inter_matrix;
1814
1815 /**
1816 * scene change detection threshold
1817 * 0 is default, larger means fewer detected scene changes.
1818 * - encoding: Set by user.
1819 * - decoding: unused
1820 */
1821 int scenechange_threshold;
1822
1823 /**
1824 * noise reduction strength
1825 * - encoding: Set by user.
1826 * - decoding: unused
1827 */
1828 int noise_reduction;
1829
1830 #if FF_API_MPV_OPT
1831 /**
1832 * @deprecated this field is unused
1833 */
1834 attribute_deprecated
1835 int me_threshold;
1836
1837 /**
1838 * @deprecated this field is unused
1839 */
1840 attribute_deprecated
1841 int mb_threshold;
1842 #endif
1843
1844 /**
1845 * precision of the intra DC coefficient - 8
1846 * - encoding: Set by user.
1847 * - decoding: unused
1848 */
1849 int intra_dc_precision;
1850
1851 /**
1852 * Number of macroblock rows at the top which are skipped.
1853 * - encoding: unused
1854 * - decoding: Set by user.
1855 */
1856 int skip_top;
1857
1858 /**
1859 * Number of macroblock rows at the bottom which are skipped.
1860 * - encoding: unused
1861 * - decoding: Set by user.
1862 */
1863 int skip_bottom;
1864
1865 #if FF_API_MPV_OPT
1866 /**
1867 * @deprecated use encoder private options instead
1868 */
1869 attribute_deprecated
1870 float border_masking;
1871 #endif
1872
1873 /**
1874 * minimum MB lagrange multipler
1875 * - encoding: Set by user.
1876 * - decoding: unused
1877 */
1878 int mb_lmin;
1879
1880 /**
1881 * maximum MB lagrange multipler
1882 * - encoding: Set by user.
1883 * - decoding: unused
1884 */
1885 int mb_lmax;
1886
1887 /**
1888 *
1889 * - encoding: Set by user.
1890 * - decoding: unused
1891 */
1892 int me_penalty_compensation;
1893
1894 /**
1895 *
1896 * - encoding: Set by user.
1897 * - decoding: unused
1898 */
1899 int bidir_refine;
1900
1901 /**
1902 *
1903 * - encoding: Set by user.
1904 * - decoding: unused
1905 */
1906 int brd_scale;
1907
1908 /**
1909 * minimum GOP size
1910 * - encoding: Set by user.
1911 * - decoding: unused
1912 */
1913 int keyint_min;
1914
1915 /**
1916 * number of reference frames
1917 * - encoding: Set by user.
1918 * - decoding: Set by lavc.
1919 */
1920 int refs;
1921
1922 /**
1923 * chroma qp offset from luma
1924 * - encoding: Set by user.
1925 * - decoding: unused
1926 */
1927 int chromaoffset;
1928
1929 #if FF_API_UNUSED_MEMBERS
1930 /**
1931 * Multiplied by qscale for each frame and added to scene_change_score.
1932 * - encoding: Set by user.
1933 * - decoding: unused
1934 */
1935 attribute_deprecated int scenechange_factor;
1936 #endif
1937
1938 /**
1939 *
1940 * Note: Value depends upon the compare function used for fullpel ME.
1941 * - encoding: Set by user.
1942 * - decoding: unused
1943 */
1944 int mv0_threshold;
1945
1946 /**
1947 * Adjust sensitivity of b_frame_strategy 1.
1948 * - encoding: Set by user.
1949 * - decoding: unused
1950 */
1951 int b_sensitivity;
1952
1953 /**
1954 * Chromaticity coordinates of the source primaries.
1955 * - encoding: Set by user
1956 * - decoding: Set by libavcodec
1957 */
1958 enum AVColorPrimaries color_primaries;
1959
1960 /**
1961 * Color Transfer Characteristic.
1962 * - encoding: Set by user
1963 * - decoding: Set by libavcodec
1964 */
1965 enum AVColorTransferCharacteristic color_trc;
1966
1967 /**
1968 * YUV colorspace type.
1969 * - encoding: Set by user
1970 * - decoding: Set by libavcodec
1971 */
1972 enum AVColorSpace colorspace;
1973
1974 /**
1975 * MPEG vs JPEG YUV range.
1976 * - encoding: Set by user
1977 * - decoding: Set by libavcodec
1978 */
1979 enum AVColorRange color_range;
1980
1981 /**
1982 * This defines the location of chroma samples.
1983 * - encoding: Set by user
1984 * - decoding: Set by libavcodec
1985 */
1986 enum AVChromaLocation chroma_sample_location;
1987
1988 /**
1989 * Number of slices.
1990 * Indicates number of picture subdivisions. Used for parallelized
1991 * decoding.
1992 * - encoding: Set by user
1993 * - decoding: unused
1994 */
1995 int slices;
1996
1997 /** Field order
1998 * - encoding: set by libavcodec
1999 * - decoding: Set by libavcodec
2000 */
2001 enum AVFieldOrder field_order;
2002
2003 /* audio only */
2004 int sample_rate; ///< samples per second
2005 int channels; ///< number of audio channels
2006
2007 /**
2008 * audio sample format
2009 * - encoding: Set by user.
2010 * - decoding: Set by libavcodec.
2011 */
2012 enum AVSampleFormat sample_fmt; ///< sample format
2013
2014 /* The following data should not be initialized. */
2015 /**
2016 * Number of samples per channel in an audio frame.
2017 *
2018 * - encoding: set by libavcodec in avcodec_open2(). Each submitted frame
2019 * except the last must contain exactly frame_size samples per channel.
2020 * May be 0 when the codec has AV_CODEC_CAP_VARIABLE_FRAME_SIZE set, then the
2021 * frame size is not restricted.
2022 * - decoding: may be set by some decoders to indicate constant frame size
2023 */
2024 int frame_size;
2025
2026 /**
2027 * Frame counter, set by libavcodec.
2028 *
2029 * - decoding: total number of frames returned from the decoder so far.
2030 * - encoding: total number of frames passed to the encoder so far.
2031 *
2032 * @note the counter is not incremented if encoding/decoding resulted in
2033 * an error.
2034 */
2035 int frame_number;
2036
2037 /**
2038 * number of bytes per packet if constant and known or 0
2039 * Used by some WAV based audio codecs.
2040 */
2041 int block_align;
2042
2043 /**
2044 * Audio cutoff bandwidth (0 means "automatic")
2045 * - encoding: Set by user.
2046 * - decoding: unused
2047 */
2048 int cutoff;
2049
2050 /**
2051 * Audio channel layout.
2052 * - encoding: set by user.
2053 * - decoding: set by libavcodec.
2054 */
2055 uint64_t channel_layout;
2056
2057 /**
2058 * Request decoder to use this channel layout if it can (0 for default)
2059 * - encoding: unused
2060 * - decoding: Set by user.
2061 */
2062 uint64_t request_channel_layout;
2063
2064 /**
2065 * Type of service that the audio stream conveys.
2066 * - encoding: Set by user.
2067 * - decoding: Set by libavcodec.
2068 */
2069 enum AVAudioServiceType audio_service_type;
2070
2071 /**
2072 * Used to request a sample format from the decoder.
2073 * - encoding: unused.
2074 * - decoding: Set by user.
2075 */
2076 enum AVSampleFormat request_sample_fmt;
2077
2078 /**
2079 * This callback is called at the beginning of each frame to get data
2080 * buffer(s) for it. There may be one contiguous buffer for all the data or
2081 * there may be a buffer per each data plane or anything in between. What
2082 * this means is, you may set however many entries in buf[] you feel necessary.
2083 * Each buffer must be reference-counted using the AVBuffer API (see description
2084 * of buf[] below).
2085 *
2086 * The following fields will be set in the frame before this callback is
2087 * called:
2088 * - format
2089 * - width, height (video only)
2090 * - sample_rate, channel_layout, nb_samples (audio only)
2091 * Their values may differ from the corresponding values in
2092 * AVCodecContext. This callback must use the frame values, not the codec
2093 * context values, to calculate the required buffer size.
2094 *
2095 * This callback must fill the following fields in the frame:
2096 * - data[]
2097 * - linesize[]
2098 * - extended_data:
2099 * * if the data is planar audio with more than 8 channels, then this
2100 * callback must allocate and fill extended_data to contain all pointers
2101 * to all data planes. data[] must hold as many pointers as it can.
2102 * extended_data must be allocated with av_malloc() and will be freed in
2103 * av_frame_unref().
2104 * * otherwise exended_data must point to data
2105 * - buf[] must contain one or more pointers to AVBufferRef structures. Each of
2106 * the frame's data and extended_data pointers must be contained in these. That
2107 * is, one AVBufferRef for each allocated chunk of memory, not necessarily one
2108 * AVBufferRef per data[] entry. See: av_buffer_create(), av_buffer_alloc(),
2109 * and av_buffer_ref().
2110 * - extended_buf and nb_extended_buf must be allocated with av_malloc() by
2111 * this callback and filled with the extra buffers if there are more
2112 * buffers than buf[] can hold. extended_buf will be freed in
2113 * av_frame_unref().
2114 *
2115 * If AV_CODEC_CAP_DR1 is not set then get_buffer2() must call
2116 * avcodec_default_get_buffer2() instead of providing buffers allocated by
2117 * some other means.
2118 *
2119 * Each data plane must be aligned to the maximum required by the target
2120 * CPU.
2121 *
2122 * @see avcodec_default_get_buffer2()
2123 *
2124 * Video:
2125 *
2126 * If AV_GET_BUFFER_FLAG_REF is set in flags then the frame may be reused
2127 * (read and/or written to if it is writable) later by libavcodec.
2128 *
2129 * avcodec_align_dimensions2() should be used to find the required width and
2130 * height, as they normally need to be rounded up to the next multiple of 16.
2131 *
2132 * If frame multithreading is used and thread_safe_callbacks is set,
2133 * this callback may be called from a different thread, but not from more
2134 * than one at once. Does not need to be reentrant.
2135 *
2136 * @see avcodec_align_dimensions2()
2137 *
2138 * Audio:
2139 *
2140 * Decoders request a buffer of a particular size by setting
2141 * AVFrame.nb_samples prior to calling get_buffer2(). The decoder may,
2142 * however, utilize only part of the buffer by setting AVFrame.nb_samples
2143 * to a smaller value in the output frame.
2144 *
2145 * As a convenience, av_samples_get_buffer_size() and
2146 * av_samples_fill_arrays() in libavutil may be used by custom get_buffer2()
2147 * functions to find the required data size and to fill data pointers and
2148 * linesize. In AVFrame.linesize, only linesize[0] may be set for audio
2149 * since all planes must be the same size.
2150 *
2151 * @see av_samples_get_buffer_size(), av_samples_fill_arrays()
2152 *
2153 * - encoding: unused
2154 * - decoding: Set by libavcodec, user can override.
2155 */
2156 int (*get_buffer2)(struct AVCodecContext *s, AVFrame *frame, int flags);
2157
2158 /**
2159 * If non-zero, the decoded audio and video frames returned from
2160 * avcodec_decode_video2() and avcodec_decode_audio4() are reference-counted
2161 * and are valid indefinitely. The caller must free them with
2162 * av_frame_unref() when they are not needed anymore.
2163 * Otherwise, the decoded frames must not be freed by the caller and are
2164 * only valid until the next decode call.
2165 *
2166 * - encoding: unused
2167 * - decoding: set by the caller before avcodec_open2().
2168 */
2169 int refcounted_frames;
2170
2171 /* - encoding parameters */
2172 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
2173 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
2174
2175 /**
2176 * minimum quantizer
2177 * - encoding: Set by user.
2178 * - decoding: unused
2179 */
2180 int qmin;
2181
2182 /**
2183 * maximum quantizer
2184 * - encoding: Set by user.
2185 * - decoding: unused
2186 */
2187 int qmax;
2188
2189 /**
2190 * maximum quantizer difference between frames
2191 * - encoding: Set by user.
2192 * - decoding: unused
2193 */
2194 int max_qdiff;
2195
2196 #if FF_API_MPV_OPT
2197 /**
2198 * @deprecated use encoder private options instead
2199 */
2200 attribute_deprecated
2201 float rc_qsquish;
2202
2203 attribute_deprecated
2204 float rc_qmod_amp;
2205 attribute_deprecated
2206 int rc_qmod_freq;
2207 #endif
2208
2209 /**
2210 * decoder bitstream buffer size
2211 * - encoding: Set by user.
2212 * - decoding: unused
2213 */
2214 int rc_buffer_size;
2215
2216 /**
2217 * ratecontrol override, see RcOverride
2218 * - encoding: Allocated/set/freed by user.
2219 * - decoding: unused
2220 */
2221 int rc_override_count;
2222 RcOverride *rc_override;
2223
2224 #if FF_API_MPV_OPT
2225 /**
2226 * @deprecated use encoder private options instead
2227 */
2228 attribute_deprecated
2229 const char *rc_eq;
2230 #endif
2231
2232 /**
2233 * maximum bitrate
2234 * - encoding: Set by user.
2235 * - decoding: unused
2236 */
2237 int rc_max_rate;
2238
2239 /**
2240 * minimum bitrate
2241 * - encoding: Set by user.
2242 * - decoding: unused
2243 */
2244 int rc_min_rate;
2245
2246 #if FF_API_MPV_OPT
2247 /**
2248 * @deprecated use encoder private options instead
2249 */
2250 attribute_deprecated
2251 float rc_buffer_aggressivity;
2252
2253 attribute_deprecated
2254 float rc_initial_cplx;
2255 #endif
2256
2257 /**
2258 * Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow.
2259 * - encoding: Set by user.
2260 * - decoding: unused.
2261 */
2262 float rc_max_available_vbv_use;
2263
2264 /**
2265 * Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow.
2266 * - encoding: Set by user.
2267 * - decoding: unused.
2268 */
2269 float rc_min_vbv_overflow_use;
2270
2271 /**
2272 * Number of bits which should be loaded into the rc buffer before decoding starts.
2273 * - encoding: Set by user.
2274 * - decoding: unused
2275 */
2276 int rc_initial_buffer_occupancy;
2277
2278 #define FF_CODER_TYPE_VLC 0
2279 #define FF_CODER_TYPE_AC 1
2280 #define FF_CODER_TYPE_RAW 2
2281 #define FF_CODER_TYPE_RLE 3
2282 #if FF_API_UNUSED_MEMBERS
2283 #define FF_CODER_TYPE_DEFLATE 4
2284 #endif /* FF_API_UNUSED_MEMBERS */
2285 /**
2286 * coder type
2287 * - encoding: Set by user.
2288 * - decoding: unused
2289 */
2290 int coder_type;
2291
2292 /**
2293 * context model
2294 * - encoding: Set by user.
2295 * - decoding: unused
2296 */
2297 int context_model;
2298
2299 #if FF_API_MPV_OPT
2300 /**
2301 * @deprecated use encoder private options instead
2302 */
2303 attribute_deprecated
2304 int lmin;
2305
2306 /**
2307 * @deprecated use encoder private options instead
2308 */
2309 attribute_deprecated
2310 int lmax;
2311 #endif
2312
2313 /**
2314 * frame skip threshold
2315 * - encoding: Set by user.
2316 * - decoding: unused
2317 */
2318 int frame_skip_threshold;
2319
2320 /**
2321 * frame skip factor
2322 * - encoding: Set by user.
2323 * - decoding: unused
2324 */
2325 int frame_skip_factor;
2326
2327 /**
2328 * frame skip exponent
2329 * - encoding: Set by user.
2330 * - decoding: unused
2331 */
2332 int frame_skip_exp;
2333
2334 /**
2335 * frame skip comparison function
2336 * - encoding: Set by user.
2337 * - decoding: unused
2338 */
2339 int frame_skip_cmp;
2340
2341 /**
2342 * trellis RD quantization
2343 * - encoding: Set by user.
2344 * - decoding: unused
2345 */
2346 int trellis;
2347
2348 /**
2349 * - encoding: Set by user.
2350 * - decoding: unused
2351 */
2352 int min_prediction_order;
2353
2354 /**
2355 * - encoding: Set by user.
2356 * - decoding: unused
2357 */
2358 int max_prediction_order;
2359
2360 /**
2361 * GOP timecode frame start number, in non drop frame format
2362 * - encoding: Set by user.
2363 * - decoding: unused
2364 */
2365 int64_t timecode_frame_start;
2366
2367 /* The RTP callback: This function is called */
2368 /* every time the encoder has a packet to send. */
2369 /* It depends on the encoder if the data starts */
2370 /* with a Start Code (it should). H.263 does. */
2371 /* mb_nb contains the number of macroblocks */
2372 /* encoded in the RTP payload. */
2373 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
2374
2375 int rtp_payload_size; /* The size of the RTP payload: the coder will */
2376 /* do its best to deliver a chunk with size */
2377 /* below rtp_payload_size, the chunk will start */
2378 /* with a start code on some codecs like H.263. */
2379 /* This doesn't take account of any particular */
2380 /* headers inside the transmitted RTP payload. */
2381
2382 /* statistics, used for 2-pass encoding */
2383 int mv_bits;
2384 int header_bits;
2385 int i_tex_bits;
2386 int p_tex_bits;
2387 int i_count;
2388 int p_count;
2389 int skip_count;
2390 int misc_bits;
2391
2392 /**
2393 * number of bits used for the previously encoded frame
2394 * - encoding: Set by libavcodec.
2395 * - decoding: unused
2396 */
2397 int frame_bits;
2398
2399 /**
2400 * pass1 encoding statistics output buffer
2401 * - encoding: Set by libavcodec.
2402 * - decoding: unused
2403 */
2404 char *stats_out;
2405
2406 /**
2407 * pass2 encoding statistics input buffer
2408 * Concatenated stuff from stats_out of pass1 should be placed here.
2409 * - encoding: Allocated/set/freed by user.
2410 * - decoding: unused
2411 */
2412 char *stats_in;
2413
2414 /**
2415 * Work around bugs in encoders which sometimes cannot be detected automatically.
2416 * - encoding: Set by user
2417 * - decoding: Set by user
2418 */
2419 int workaround_bugs;
2420 #define FF_BUG_AUTODETECT 1 ///< autodetection
2421 #if FF_API_OLD_MSMPEG4
2422 #define FF_BUG_OLD_MSMPEG4 2
2423 #endif
2424 #define FF_BUG_XVID_ILACE 4
2425 #define FF_BUG_UMP4 8
2426 #define FF_BUG_NO_PADDING 16
2427 #define FF_BUG_AMV 32
2428 #if FF_API_AC_VLC
2429 #define FF_BUG_AC_VLC 0 ///< Will be removed, libavcodec can now handle these non-compliant files by default.
2430 #endif
2431 #define FF_BUG_QPEL_CHROMA 64
2432 #define FF_BUG_STD_QPEL 128
2433 #define FF_BUG_QPEL_CHROMA2 256
2434 #define FF_BUG_DIRECT_BLOCKSIZE 512
2435 #define FF_BUG_EDGE 1024
2436 #define FF_BUG_HPEL_CHROMA 2048
2437 #define FF_BUG_DC_CLIP 4096
2438 #define FF_BUG_MS 8192 ///< Work around various bugs in Microsoft's broken decoders.
2439 #define FF_BUG_TRUNCATED 16384
2440
2441 /**
2442 * strictly follow the standard (MPEG4, ...).
2443 * - encoding: Set by user.
2444 * - decoding: Set by user.
2445 * Setting this to STRICT or higher means the encoder and decoder will
2446 * generally do stupid things, whereas setting it to unofficial or lower
2447 * will mean the encoder might produce output that is not supported by all
2448 * spec-compliant decoders. Decoders don't differentiate between normal,
2449 * unofficial and experimental (that is, they always try to decode things
2450 * when they can) unless they are explicitly asked to behave stupidly
2451 * (=strictly conform to the specs)
2452 */
2453 int strict_std_compliance;
2454 #define FF_COMPLIANCE_VERY_STRICT 2 ///< Strictly conform to an older more strict version of the spec or reference software.
2455 #define FF_COMPLIANCE_STRICT 1 ///< Strictly conform to all the things in the spec no matter what consequences.
2456 #define FF_COMPLIANCE_NORMAL 0
2457 #define FF_COMPLIANCE_UNOFFICIAL -1 ///< Allow unofficial extensions
2458 #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
2459
2460 /**
2461 * error concealment flags
2462 * - encoding: unused
2463 * - decoding: Set by user.
2464 */
2465 int error_concealment;
2466 #define FF_EC_GUESS_MVS 1
2467 #define FF_EC_DEBLOCK 2
2468
2469 /**
2470 * debug
2471 * - encoding: Set by user.
2472 * - decoding: Set by user.
2473 */
2474 int debug;
2475 #define FF_DEBUG_PICT_INFO 1
2476 #define FF_DEBUG_RC 2
2477 #define FF_DEBUG_BITSTREAM 4
2478 #define FF_DEBUG_MB_TYPE 8
2479 #define FF_DEBUG_QP 16
2480 #if FF_API_DEBUG_MV
2481 /**
2482 * @deprecated this option does nothing
2483 */
2484 #define FF_DEBUG_MV 32
2485 #endif
2486 #define FF_DEBUG_DCT_COEFF 0x00000040
2487 #define FF_DEBUG_SKIP 0x00000080
2488 #define FF_DEBUG_STARTCODE 0x00000100
2489 #if FF_API_UNUSED_MEMBERS
2490 #define FF_DEBUG_PTS 0x00000200
2491 #endif /* FF_API_UNUSED_MEMBERS */
2492 #define FF_DEBUG_ER 0x00000400
2493 #define FF_DEBUG_MMCO 0x00000800
2494 #define FF_DEBUG_BUGS 0x00001000
2495 #if FF_API_DEBUG_MV
2496 #define FF_DEBUG_VIS_QP 0x00002000
2497 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
2498 #endif
2499 #define FF_DEBUG_BUFFERS 0x00008000
2500 #define FF_DEBUG_THREADS 0x00010000
2501
2502 #if FF_API_DEBUG_MV
2503 /**
2504 * @deprecated this option does not have any effect
2505 */
2506 attribute_deprecated
2507 int debug_mv;
2508 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
2509 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
2510 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
2511 #endif
2512
2513 /**
2514 * Error recognition; may misdetect some more or less valid parts as errors.
2515 * - encoding: unused
2516 * - decoding: Set by user.
2517 */
2518 int err_recognition;
2519
2520 /**
2521 * Verify checksums embedded in the bitstream (could be of either encoded or
2522 * decoded data, depending on the codec) and print an error message on mismatch.
2523 * If AV_EF_EXPLODE is also set, a mismatching checksum will result in the
2524 * decoder returning an error.
2525 */
2526 #define AV_EF_CRCCHECK (1<<0)
2527 #define AV_EF_BITSTREAM (1<<1)
2528 #define AV_EF_BUFFER (1<<2)
2529 #define AV_EF_EXPLODE (1<<3)
2530
2531 /**
2532 * opaque 64bit number (generally a PTS) that will be reordered and
2533 * output in AVFrame.reordered_opaque
2534 * - encoding: unused
2535 * - decoding: Set by user.
2536 */
2537 int64_t reordered_opaque;
2538
2539 /**
2540 * Hardware accelerator in use
2541 * - encoding: unused.
2542 * - decoding: Set by libavcodec
2543 */
2544 struct AVHWAccel *hwaccel;
2545
2546 /**
2547 * Hardware accelerator context.
2548 * For some hardware accelerators, a global context needs to be
2549 * provided by the user. In that case, this holds display-dependent
2550 * data Libav cannot instantiate itself. Please refer to the
2551 * Libav HW accelerator documentation to know how to fill this
2552 * is. e.g. for VA API, this is a struct vaapi_context.
2553 * - encoding: unused
2554 * - decoding: Set by user
2555 */
2556 void *hwaccel_context;
2557
2558 /**
2559 * error
2560 * - encoding: Set by libavcodec if flags & AV_CODEC_FLAG_PSNR.
2561 * - decoding: unused
2562 */
2563 uint64_t error[AV_NUM_DATA_POINTERS];
2564
2565 /**
2566 * DCT algorithm, see FF_DCT_* below
2567 * - encoding: Set by user.
2568 * - decoding: unused
2569 */
2570 int dct_algo;
2571 #define FF_DCT_AUTO 0
2572 #define FF_DCT_FASTINT 1
2573 #if FF_API_UNUSED_MEMBERS
2574 #define FF_DCT_INT 2
2575 #endif /* FF_API_UNUSED_MEMBERS */
2576 #define FF_DCT_MMX 3
2577 #define FF_DCT_ALTIVEC 5
2578 #define FF_DCT_FAAN 6
2579
2580 /**
2581 * IDCT algorithm, see FF_IDCT_* below.
2582 * - encoding: Set by user.
2583 * - decoding: Set by user.
2584 */
2585 int idct_algo;
2586 #define FF_IDCT_AUTO 0
2587 #define FF_IDCT_INT 1
2588 #define FF_IDCT_SIMPLE 2
2589 #define FF_IDCT_SIMPLEMMX 3
2590 #define FF_IDCT_ARM 7
2591 #define FF_IDCT_ALTIVEC 8
2592 #if FF_API_ARCH_SH4
2593 #define FF_IDCT_SH4 9
2594 #endif
2595 #define FF_IDCT_SIMPLEARM 10
2596 #if FF_API_UNUSED_MEMBERS
2597 #define FF_IDCT_IPP 13
2598 #endif /* FF_API_UNUSED_MEMBERS */
2599 #define FF_IDCT_XVID 14
2600 #if FF_API_IDCT_XVIDMMX
2601 #define FF_IDCT_XVIDMMX 14
2602 #endif /* FF_API_IDCT_XVIDMMX */
2603 #define FF_IDCT_SIMPLEARMV5TE 16
2604 #define FF_IDCT_SIMPLEARMV6 17
2605 #if FF_API_ARCH_SPARC
2606 #define FF_IDCT_SIMPLEVIS 18
2607 #endif
2608 #define FF_IDCT_FAAN 20
2609 #define FF_IDCT_SIMPLENEON 22
2610 #if FF_API_ARCH_ALPHA
2611 #define FF_IDCT_SIMPLEALPHA 23
2612 #endif
2613
2614 /**
2615 * bits per sample/pixel from the demuxer (needed for huffyuv).
2616 * - encoding: Set by libavcodec.
2617 * - decoding: Set by user.
2618 */
2619 int bits_per_coded_sample;
2620
2621 /**
2622 * Bits per sample/pixel of internal libavcodec pixel/sample format.
2623 * - encoding: set by user.
2624 * - decoding: set by libavcodec.
2625 */
2626 int bits_per_raw_sample;
2627
2628 #if FF_API_LOWRES
2629 /**
2630 * low resolution decoding, 1-> 1/2 size, 2->1/4 size
2631 * - encoding: unused
2632 * - decoding: Set by user.
2633 *
2634 * @deprecated use decoder private options instead
2635 */
2636 attribute_deprecated int lowres;
2637 #endif
2638
2639 #if FF_API_CODED_FRAME
2640 /**
2641 * the picture in the bitstream
2642 * - encoding: Set by libavcodec.
2643 * - decoding: unused
2644 *
2645 * @deprecated use the quality factor packet side data instead
2646 */
2647 attribute_deprecated AVFrame *coded_frame;
2648 #endif
2649
2650 /**
2651 * thread count
2652 * is used to decide how many independent tasks should be passed to execute()
2653 * - encoding: Set by user.
2654 * - decoding: Set by user.
2655 */
2656 int thread_count;
2657
2658 /**
2659 * Which multithreading methods to use.
2660 * Use of FF_THREAD_FRAME will increase decoding delay by one frame per thread,
2661 * so clients which cannot provide future frames should not use it.
2662 *
2663 * - encoding: Set by user, otherwise the default is used.
2664 * - decoding: Set by user, otherwise the default is used.
2665 */
2666 int thread_type;
2667 #define FF_THREAD_FRAME 1 ///< Decode more than one frame at once
2668 #define FF_THREAD_SLICE 2 ///< Decode more than one part of a single frame at once
2669
2670 /**
2671 * Which multithreading methods are in use by the codec.
2672 * - encoding: Set by libavcodec.
2673 * - decoding: Set by libavcodec.
2674 */
2675 int active_thread_type;
2676
2677 /**
2678 * Set by the client if its custom get_buffer() callback can be called
2679 * synchronously from another thread, which allows faster multithreaded decoding.
2680 * draw_horiz_band() will be called from other threads regardless of this setting.
2681 * Ignored if the default get_buffer() is used.
2682 * - encoding: Set by user.
2683 * - decoding: Set by user.
2684 */
2685 int thread_safe_callbacks;
2686
2687 /**
2688 * The codec may call this to execute several independent things.
2689 * It will return only after finishing all tasks.
2690 * The user may replace this with some multithreaded implementation,
2691 * the default implementation will execute the parts serially.
2692 * @param count the number of things to execute
2693 * - encoding: Set by libavcodec, user can override.
2694 * - decoding: Set by libavcodec, user can override.
2695 */
2696 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size);
2697
2698 /**
2699 * The codec may call this to execute several independent things.
2700 * It will return only after finishing all tasks.
2701 * The user may replace this with some multithreaded implementation,
2702 * the default implementation will execute the parts serially.
2703 * Also see avcodec_thread_init and e.g. the --enable-pthread configure option.
2704 * @param c context passed also to func
2705 * @param count the number of things to execute
2706 * @param arg2 argument passed unchanged to func
2707 * @param ret return values of executed functions, must have space for "count" values. May be NULL.
2708 * @param func function that will be called count times, with jobnr from 0 to count-1.
2709 * threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no
2710 * two instances of func executing at the same time will have the same threadnr.
2711 * @return always 0 currently, but code should handle a future improvement where when any call to func
2712 * returns < 0 no further calls to func may be done and < 0 is returned.
2713 * - encoding: Set by libavcodec, user can override.
2714 * - decoding: Set by libavcodec, user can override.
2715 */
2716 int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count);
2717
2718 /**
2719 * noise vs. sse weight for the nsse comparsion function
2720 * - encoding: Set by user.
2721 * - decoding: unused
2722 */
2723 int nsse_weight;
2724
2725 /**
2726 * profile
2727 * - encoding: Set by user.
2728 * - decoding: Set by libavcodec.
2729 */
2730 int profile;
2731 #define FF_PROFILE_UNKNOWN -99
2732 #define FF_PROFILE_RESERVED -100
2733
2734 #define FF_PROFILE_AAC_MAIN 0
2735 #define FF_PROFILE_AAC_LOW 1
2736 #define FF_PROFILE_AAC_SSR 2
2737 #define FF_PROFILE_AAC_LTP 3
2738 #define FF_PROFILE_AAC_HE 4
2739 #define FF_PROFILE_AAC_HE_V2 28
2740 #define FF_PROFILE_AAC_LD 22
2741 #define FF_PROFILE_AAC_ELD 38
2742 #define FF_PROFILE_MPEG2_AAC_LOW 128
2743 #define FF_PROFILE_MPEG2_AAC_HE 131
2744
2745 #define FF_PROFILE_DTS 20
2746 #define FF_PROFILE_DTS_ES 30
2747 #define FF_PROFILE_DTS_96_24 40
2748 #define FF_PROFILE_DTS_HD_HRA 50
2749 #define FF_PROFILE_DTS_HD_MA 60
2750 #define FF_PROFILE_DTS_EXPRESS 70
2751
2752 #define FF_PROFILE_MPEG2_422 0
2753 #define FF_PROFILE_MPEG2_HIGH 1
2754 #define FF_PROFILE_MPEG2_SS 2
2755 #define FF_PROFILE_MPEG2_SNR_SCALABLE 3
2756 #define FF_PROFILE_MPEG2_MAIN 4
2757 #define FF_PROFILE_MPEG2_SIMPLE 5
2758
2759 #define FF_PROFILE_H264_CONSTRAINED (1<<9) // 8+1; constraint_set1_flag
2760 #define FF_PROFILE_H264_INTRA (1<<11) // 8+3; constraint_set3_flag
2761
2762 #define FF_PROFILE_H264_BASELINE 66
2763 #define FF_PROFILE_H264_CONSTRAINED_BASELINE (66|FF_PROFILE_H264_CONSTRAINED)
2764 #define FF_PROFILE_H264_MAIN 77
2765 #define FF_PROFILE_H264_EXTENDED 88
2766 #define FF_PROFILE_H264_HIGH 100
2767 #define FF_PROFILE_H264_HIGH_10 110
2768 #define FF_PROFILE_H264_HIGH_10_INTRA (110|FF_PROFILE_H264_INTRA)
2769 #define FF_PROFILE_H264_HIGH_422 122
2770 #define FF_PROFILE_H264_HIGH_422_INTRA (122|FF_PROFILE_H264_INTRA)
2771 #define FF_PROFILE_H264_HIGH_444 144
2772 #define FF_PROFILE_H264_HIGH_444_PREDICTIVE 244
2773 #define FF_PROFILE_H264_HIGH_444_INTRA (244|FF_PROFILE_H264_INTRA)
2774 #define FF_PROFILE_H264_CAVLC_444 44
2775
2776 #define FF_PROFILE_VC1_SIMPLE 0
2777 #define FF_PROFILE_VC1_MAIN 1
2778 #define FF_PROFILE_VC1_COMPLEX 2
2779 #define FF_PROFILE_VC1_ADVANCED 3
2780
2781 #define FF_PROFILE_MPEG4_SIMPLE 0
2782 #define FF_PROFILE_MPEG4_SIMPLE_SCALABLE 1
2783 #define FF_PROFILE_MPEG4_CORE 2
2784 #define FF_PROFILE_MPEG4_MAIN 3
2785 #define FF_PROFILE_MPEG4_N_BIT 4
2786 #define FF_PROFILE_MPEG4_SCALABLE_TEXTURE 5
2787 #define FF_PROFILE_MPEG4_SIMPLE_FACE_ANIMATION 6
2788 #define FF_PROFILE_MPEG4_BASIC_ANIMATED_TEXTURE 7
2789 #define FF_PROFILE_MPEG4_HYBRID 8
2790 #define FF_PROFILE_MPEG4_ADVANCED_REAL_TIME 9
2791 #define FF_PROFILE_MPEG4_CORE_SCALABLE 10
2792 #define FF_PROFILE_MPEG4_ADVANCED_CODING 11
2793 #define FF_PROFILE_MPEG4_ADVANCED_CORE 12
2794 #define FF_PROFILE_MPEG4_ADVANCED_SCALABLE_TEXTURE 13
2795 #define FF_PROFILE_MPEG4_SIMPLE_STUDIO 14
2796 #define FF_PROFILE_MPEG4_ADVANCED_SIMPLE 15
2797
2798 #define FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_0 0
2799 #define FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_1 1
2800 #define FF_PROFILE_JPEG2000_CSTREAM_NO_RESTRICTION 2
2801 #define FF_PROFILE_JPEG2000_DCINEMA_2K 3
2802 #define FF_PROFILE_JPEG2000_DCINEMA_4K 4
2803
2804 #define FF_PROFILE_VP9_0 0
2805 #define FF_PROFILE_VP9_1 1
2806 #define FF_PROFILE_VP9_2 2
2807 #define FF_PROFILE_VP9_3 3
2808
2809 #define FF_PROFILE_HEVC_MAIN 1
2810 #define FF_PROFILE_HEVC_MAIN_10 2
2811 #define FF_PROFILE_HEVC_MAIN_STILL_PICTURE 3
2812
2813 /**
2814 * level
2815 * - encoding: Set by user.
2816 * - decoding: Set by libavcodec.
2817 */
2818 int level;
2819 #define FF_LEVEL_UNKNOWN -99
2820
2821 /**
2822 *
2823 * - encoding: unused
2824 * - decoding: Set by user.
2825 */
2826 enum AVDiscard skip_loop_filter;
2827
2828 /**
2829 *
2830 * - encoding: unused
2831 * - decoding: Set by user.
2832 */
2833 enum AVDiscard skip_idct;
2834
2835 /**
2836 *
2837 * - encoding: unused
2838 * - decoding: Set by user.
2839 */
2840 enum AVDiscard skip_frame;
2841
2842 /**
2843 * Header containing style information for text subtitles.
2844 * For SUBTITLE_ASS subtitle type, it should contain the whole ASS
2845 * [Script Info] and [V4+ Styles] section, plus the [Events] line and
2846 * the Format line following. It shouldn't include any Dialogue line.
2847 * - encoding: Set/allocated/freed by user (before avcodec_open2())
2848 * - decoding: Set/allocated/freed by libavcodec (by avcodec_open2())
2849 */
2850 uint8_t *subtitle_header;
2851 int subtitle_header_size;
2852
2853 #if FF_API_ERROR_RATE
2854 /**
2855 * @deprecated use the 'error_rate' private AVOption of the mpegvideo
2856 * encoders
2857 */
2858 attribute_deprecated
2859 int error_rate;
2860 #endif
2861
2862 /**
2863 * VBV delay coded in the last frame (in periods of a 27 MHz clock).
2864 * Used for compliant TS muxing.
2865 * - encoding: Set by libavcodec.
2866 * - decoding: unused.
2867 */
2868 uint64_t vbv_delay;
2869
2870 /**
2871 * Encoding only. Allow encoders to output packets that do not contain any
2872 * encoded data, only side data.
2873 *
2874 * Some encoders need to output such packets, e.g. to update some stream
2875 * parameters at the end of encoding.
2876 *
2877 * All callers are strongly recommended to set this option to 1 and update
2878 * their code to deal with such packets, since this behaviour may become
2879 * always enabled in the future (then this option will be deprecated and
2880 * later removed). To avoid ABI issues when this happens, the callers should
2881 * use AVOptions to set this field.
2882 */
2883 int side_data_only_packets;
2884
2885 /**
2886 * Audio only. The number of "priming" samples (padding) inserted by the
2887 * encoder at the beginning of the audio. I.e. this number of leading
2888 * decoded samples must be discarded by the caller to get the original audio
2889 * without leading padding.
2890 *
2891 * - decoding: unused
2892 * - encoding: Set by libavcodec. The timestamps on the output packets are
2893 * adjusted by the encoder so that they always refer to the
2894 * first sample of the data actually contained in the packet,
2895 * including any added padding. E.g. if the timebase is
2896 * 1/samplerate and the timestamp of the first input sample is
2897 * 0, the timestamp of the first output packet will be
2898 * -initial_padding.
2899 */
2900 int initial_padding;
2901
2902 /*
2903 * - decoding: For codecs that store a framerate value in the compressed
2904 * bitstream, the decoder may export it here. { 0, 1} when
2905 * unknown.
2906 * - encoding: unused
2907 */
2908 AVRational framerate;
2909
2910 /**
2911 * Nominal unaccelerated pixel format, see AV_PIX_FMT_xxx.
2912 * - encoding: unused.
2913 * - decoding: Set by libavcodec before calling get_format()
2914 */
2915 enum AVPixelFormat sw_pix_fmt;
2916 } AVCodecContext;
2917
2918 /**
2919 * AVProfile.
2920 */
2921 typedef struct AVProfile {
2922 int profile;
2923 const char *name; ///< short name for the profile
2924 } AVProfile;
2925
2926 typedef struct AVCodecDefault AVCodecDefault;
2927
2928 struct AVSubtitle;
2929
2930 /**
2931 * AVCodec.
2932 */
2933 typedef struct AVCodec {
2934 /**
2935 * Name of the codec implementation.
2936 * The name is globally unique among encoders and among decoders (but an
2937 * encoder and a decoder can share the same name).
2938 * This is the primary way to find a codec from the user perspective.
2939 */
2940 const char *name;
2941 /**
2942 * Descriptive name for the codec, meant to be more human readable than name.
2943 * You should use the NULL_IF_CONFIG_SMALL() macro to define it.
2944 */
2945 const char *long_name;
2946 enum AVMediaType type;
2947 enum AVCodecID id;
2948 /**
2949 * Codec capabilities.
2950 * see AV_CODEC_CAP_*
2951 */
2952 int capabilities;
2953 const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0}
2954 const enum AVPixelFormat *pix_fmts; ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1
2955 const int *supported_samplerates; ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
2956 const enum AVSampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1
2957 const uint64_t *channel_layouts; ///< array of support channel layouts, or NULL if unknown. array is terminated by 0
2958 #if FF_API_LOWRES
2959 attribute_deprecated uint8_t max_lowres; ///< maximum value for lowres supported by the decoder
2960 #endif
2961 const AVClass *priv_class; ///< AVClass for the private context
2962 const AVProfile *profiles; ///< array of recognized profiles, or NULL if unknown, array is terminated by {FF_PROFILE_UNKNOWN}
2963
2964 /*****************************************************************
2965 * No fields below this line are part of the public API. They
2966 * may not be used outside of libavcodec and can be changed and
2967 * removed at will.
2968 * New public fields should be added right above.
2969 *****************************************************************
2970 */
2971 int priv_data_size;
2972 struct AVCodec *next;
2973 /**
2974 * @name Frame-level threading support functions
2975 * @{
2976 */
2977 /**
2978 * If defined, called on thread contexts when they are created.
2979 * If the codec allocates writable tables in init(), re-allocate them here.
2980 * priv_data will be set to a copy of the original.
2981 */
2982 int (*init_thread_copy)(AVCodecContext *);
2983 /**
2984 * Copy necessary context variables from a previous thread context to the current one.
2985 * If not defined, the next thread will start automatically; otherwise, the codec
2986 * must call ff_thread_finish_setup().
2987 *
2988 * dst and src will (rarely) point to the same context, in which case memcpy should be skipped.
2989 */
2990 int (*update_thread_context)(AVCodecContext *dst, const AVCodecContext *src);
2991 /** @} */
2992
2993 /**
2994 * Private codec-specific defaults.
2995 */
2996 const AVCodecDefault *defaults;
2997
2998 /**
2999 * Initialize codec static data, called from avcodec_register().
3000 */
3001 void (*init_static_data)(struct AVCodec *codec);
3002
3003 int (*init)(AVCodecContext *);
3004 int (*encode_sub)(AVCodecContext *, uint8_t *buf, int buf_size,
3005 const struct AVSubtitle *sub);
3006 /**
3007 * Encode data to an AVPacket.
3008 *
3009 * @param avctx codec context
3010 * @param avpkt output AVPacket (may contain a user-provided buffer)
3011 * @param[in] frame AVFrame containing the raw data to be encoded
3012 * @param[out] got_packet_ptr encoder sets to 0 or 1 to indicate that a
3013 * non-empty packet was returned in avpkt.
3014 * @return 0 on success, negative error code on failure
3015 */
3016 int (*encode2)(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame,
3017 int *got_packet_ptr);
3018 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt);
3019 int (*close)(AVCodecContext *);
3020 /**
3021 * Flush buffers.
3022 * Will be called when seeking
3023 */
3024 void (*flush)(AVCodecContext *);
3025 /**
3026 * Internal codec capabilities.
3027 * See FF_CODEC_CAP_* in internal.h
3028 */
3029 int caps_internal;
3030 } AVCodec;
3031
3032 /**
3033 * @defgroup lavc_hwaccel AVHWAccel
3034 * @{
3035 */
3036 typedef struct AVHWAccel {
3037 /**
3038 * Name of the hardware accelerated codec.
3039 * The name is globally unique among encoders and among decoders (but an
3040 * encoder and a decoder can share the same name).
3041 */
3042 const char *name;
3043
3044 /**
3045 * Type of codec implemented by the hardware accelerator.
3046 *
3047 * See AVMEDIA_TYPE_xxx
3048 */
3049 enum AVMediaType type;
3050
3051 /**
3052 * Codec implemented by the hardware accelerator.
3053 *
3054 * See AV_CODEC_ID_xxx
3055 */
3056 enum AVCodecID id;
3057
3058 /**
3059 * Supported pixel format.
3060 *
3061 * Only hardware accelerated formats are supported here.
3062 */
3063 enum AVPixelFormat pix_fmt;
3064
3065 /**
3066 * Hardware accelerated codec capabilities.
3067 * see FF_HWACCEL_CODEC_CAP_*
3068 */
3069 int capabilities;
3070
3071 /*****************************************************************
3072 * No fields below this line are part of the public API. They
3073 * may not be used outside of libavcodec and can be changed and
3074 * removed at will.
3075 * New public fields should be added right above.
3076 *****************************************************************
3077 */
3078 struct AVHWAccel *next;
3079
3080 /**
3081 * Allocate a custom buffer
3082 */
3083 int (*alloc_frame)(AVCodecContext *avctx, AVFrame *frame);
3084
3085 /**
3086 * Called at the beginning of each frame or field picture.
3087 *
3088 * Meaningful frame information (codec specific) is guaranteed to
3089 * be parsed at this point. This function is mandatory.
3090 *
3091 * Note that buf can be NULL along with buf_size set to 0.
3092 * Otherwise, this means the whole frame is available at this point.
3093 *
3094 * @param avctx the codec context
3095 * @param buf the frame data buffer base
3096 * @param buf_size the size of the frame in bytes
3097 * @return zero if successful, a negative value otherwise
3098 */
3099 int (*start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
3100
3101 /**
3102 * Callback for each slice.
3103 *
3104 * Meaningful slice information (codec specific) is guaranteed to
3105 * be parsed at this point. This function is mandatory.
3106 *
3107 * @param avctx the codec context
3108 * @param buf the slice data buffer base
3109 * @param buf_size the size of the slice in bytes
3110 * @return zero if successful, a negative value otherwise
3111 */
3112 int (*decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
3113
3114 /**
3115 * Called at the end of each frame or field picture.
3116 *
3117 * The whole picture is parsed at this point and can now be sent
3118 * to the hardware accelerator. This function is mandatory.
3119 *
3120 * @param avctx the codec context
3121 * @return zero if successful, a negative value otherwise
3122 */
3123 int (*end_frame)(AVCodecContext *avctx);
3124
3125 /**
3126 * Size of per-frame hardware accelerator private data.
3127 *
3128 * Private data is allocated with av_mallocz() before
3129 * AVCodecContext.get_buffer() and deallocated after
3130 * AVCodecContext.release_buffer().
3131 */
3132 int frame_priv_data_size;
3133
3134 /**
3135 * Initialize the hwaccel private data.
3136 *
3137 * This will be called from ff_get_format(), after hwaccel and
3138 * hwaccel_context are set and the hwaccel private data in AVCodecInternal
3139 * is allocated.
3140 */
3141 int (*init)(AVCodecContext *avctx);
3142
3143 /**
3144 * Uninitialize the hwaccel private data.
3145 *
3146 * This will be called from get_format() or avcodec_close(), after hwaccel
3147 * and hwaccel_context are already uninitialized.
3148 */
3149 int (*uninit)(AVCodecContext *avctx);
3150
3151 /**
3152 * Size of the private data to allocate in
3153 * AVCodecInternal.hwaccel_priv_data.
3154 */
3155 int priv_data_size;
3156 } AVHWAccel;
3157
3158 /**
3159 * Hardware acceleration should be used for decoding even if the codec level
3160 * used is unknown or higher than the maximum supported level reported by the
3161 * hardware driver.
3162 */
3163 #define AV_HWACCEL_FLAG_IGNORE_LEVEL (1 << 0)
3164
3165 /**
3166 * Hardware acceleration can output YUV pixel formats with a different chroma
3167 * sampling than 4:2:0 and/or other than 8 bits per component.
3168 */
3169 #define AV_HWACCEL_FLAG_ALLOW_HIGH_DEPTH (1 << 1)
3170
3171 /**
3172 * @}
3173 */
3174
3175 /**
3176 * @defgroup lavc_picture AVPicture
3177 *
3178 * Functions for working with AVPicture
3179 * @{
3180 */
3181
3182 /**
3183 * four components are given, that's all.
3184 * the last component is alpha
3185 */
3186 typedef struct AVPicture {
3187 uint8_t *data[AV_NUM_DATA_POINTERS];
3188 int linesize[AV_NUM_DATA_POINTERS]; ///< number of bytes per line
3189 } AVPicture;
3190
3191 /**
3192 * @}
3193 */
3194
3195 #define AVPALETTE_SIZE 1024
3196 #define AVPALETTE_COUNT 256
3197
3198 enum AVSubtitleType {
3199 SUBTITLE_NONE,
3200
3201 SUBTITLE_BITMAP, ///< A bitmap, pict will be set
3202
3203 /**
3204 * Plain text, the text field must be set by the decoder and is
3205 * authoritative. ass and pict fields may contain approximations.
3206 */
3207 SUBTITLE_TEXT,
3208
3209 /**
3210 * Formatted text, the ass field must be set by the decoder and is
3211 * authoritative. pict and text fields may contain approximations.
3212 */
3213 SUBTITLE_ASS,
3214 };
3215
3216 #define AV_SUBTITLE_FLAG_FORCED 0x00000001
3217
3218 typedef struct AVSubtitleRect {
3219 int x; ///< top left corner of pict, undefined when pict is not set
3220 int y; ///< top left corner of pict, undefined when pict is not set
3221 int w; ///< width of pict, undefined when pict is not set
3222 int h; ///< height of pict, undefined when pict is not set
3223 int nb_colors; ///< number of colors in pict, undefined when pict is not set
3224
3225 /**
3226 * data+linesize for the bitmap of this subtitle.
3227 * can be set for text/ass as well once they where rendered
3228 */
3229 AVPicture pict;
3230 enum AVSubtitleType type;
3231
3232 char *text; ///< 0 terminated plain UTF-8 text
3233
3234 /**
3235 * 0 terminated ASS/SSA compatible event line.
3236 * The pressentation of this is unaffected by the other values in this
3237 * struct.
3238 */
3239 char *ass;
3240 int flags;
3241 } AVSubtitleRect;
3242
3243 typedef struct AVSubtitle {
3244 uint16_t format; /* 0 = graphics */
3245 uint32_t start_display_time; /* relative to packet pts, in ms */
3246 uint32_t end_display_time; /* relative to packet pts, in ms */
3247 unsigned num_rects;
3248 AVSubtitleRect **rects;
3249 int64_t pts; ///< Same as packet pts, in AV_TIME_BASE
3250 } AVSubtitle;
3251
3252 /**
3253 * If c is NULL, returns the first registered codec,
3254 * if c is non-NULL, returns the next registered codec after c,
3255 * or NULL if c is the last one.
3256 */
3257 AVCodec *av_codec_next(const AVCodec *c);
3258
3259 /**
3260 * Return the LIBAVCODEC_VERSION_INT constant.
3261 */
3262 unsigned avcodec_version(void);
3263
3264 /**
3265 * Return the libavcodec build-time configuration.
3266 */
3267 const char *avcodec_configuration(void);
3268
3269 /**
3270 * Return the libavcodec license.
3271 */
3272 const char *avcodec_license(void);
3273
3274 /**
3275 * Register the codec codec and initialize libavcodec.
3276 *
3277 * @warning either this function or avcodec_register_all() must be called
3278 * before any other libavcodec functions.
3279 *
3280 * @see avcodec_register_all()
3281 */
3282 void avcodec_register(AVCodec *codec);
3283
3284 /**
3285 * Register all the codecs, parsers and bitstream filters which were enabled at
3286 * configuration time. If you do not call this function you can select exactly
3287 * which formats you want to support, by using the individual registration
3288 * functions.
3289 *
3290 * @see avcodec_register
3291 * @see av_register_codec_parser
3292 * @see av_register_bitstream_filter
3293 */
3294 void avcodec_register_all(void);
3295
3296 /**
3297 * Allocate an AVCodecContext and set its fields to default values. The
3298 * resulting struct should be freed with avcodec_free_context().
3299 *
3300 * @param codec if non-NULL, allocate private data and initialize defaults
3301 * for the given codec. It is illegal to then call avcodec_open2()
3302 * with a different codec.
3303 * If NULL, then the codec-specific defaults won't be initialized,
3304 * which may result in suboptimal default settings (this is
3305 * important mainly for encoders, e.g. libx264).
3306 *
3307 * @return An AVCodecContext filled with default values or NULL on failure.
3308 * @see avcodec_get_context_defaults
3309 */
3310 AVCodecContext *avcodec_alloc_context3(const AVCodec *codec);
3311
3312 /**
3313 * Free the codec context and everything associated with it and write NULL to
3314 * the provided pointer.
3315 */
3316 void avcodec_free_context(AVCodecContext **avctx);
3317
3318 /**
3319 * Set the fields of the given AVCodecContext to default values corresponding
3320 * to the given codec (defaults may be codec-dependent).
3321 *
3322 * Do not call this function if a non-NULL codec has been passed
3323 * to avcodec_alloc_context3() that allocated this AVCodecContext.
3324 * If codec is non-NULL, it is illegal to call avcodec_open2() with a
3325 * different codec on this AVCodecContext.
3326 */
3327 int avcodec_get_context_defaults3(AVCodecContext *s, const AVCodec *codec);
3328
3329 /**
3330 * Get the AVClass for AVCodecContext. It can be used in combination with
3331 * AV_OPT_SEARCH_FAKE_OBJ for examining options.
3332 *
3333 * @see av_opt_find().
3334 */
3335 const AVClass *avcodec_get_class(void);
3336
3337 /**
3338 * Copy the settings of the source AVCodecContext into the destination
3339 * AVCodecContext. The resulting destination codec context will be
3340 * unopened, i.e. you are required to call avcodec_open2() before you
3341 * can use this AVCodecContext to decode/encode video/audio data.
3342 *
3343 * @param dest target codec context, should be initialized with
3344 * avcodec_alloc_context3(), but otherwise uninitialized
3345 * @param src source codec context
3346 * @return AVERROR() on error (e.g. memory allocation error), 0 on success
3347 */
3348 int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src);
3349
3350 /**
3351 * Initialize the AVCodecContext to use the given AVCodec. Prior to using this
3352 * function the context has to be allocated with avcodec_alloc_context3().
3353 *
3354 * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
3355 * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
3356 * retrieving a codec.
3357 *
3358 * @warning This function is not thread safe!
3359 *
3360 * @note Always call this function before using decoding routines (such as
3361 * @ref avcodec_decode_video2()).
3362 *
3363 * @code
3364 * avcodec_register_all();
3365 * av_dict_set(&opts, "b", "2.5M", 0);
3366 * codec = avcodec_find_decoder(AV_CODEC_ID_H264);
3367 * if (!codec)
3368 * exit(1);
3369 *
3370 * context = avcodec_alloc_context3(codec);
3371 *
3372 * if (avcodec_open2(context, codec, opts) < 0)
3373 * exit(1);
3374 * @endcode
3375 *
3376 * @param avctx The context to initialize.
3377 * @param codec The codec to open this context for. If a non-NULL codec has been
3378 * previously passed to avcodec_alloc_context3() or
3379 * avcodec_get_context_defaults3() for this context, then this
3380 * parameter MUST be either NULL or equal to the previously passed
3381 * codec.
3382 * @param options A dictionary filled with AVCodecContext and codec-private options.
3383 * On return this object will be filled with options that were not found.
3384 *
3385 * @return zero on success, a negative value on error
3386 * @see avcodec_alloc_context3(), avcodec_find_decoder(), avcodec_find_encoder(),
3387 * av_dict_set(), av_opt_find().
3388 */
3389 int avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options);
3390
3391 /**
3392 * Close a given AVCodecContext and free all the data associated with it
3393 * (but not the AVCodecContext itself).
3394 *
3395 * Calling this function on an AVCodecContext that hasn't been opened will free
3396 * the codec-specific data allocated in avcodec_alloc_context3() /
3397 * avcodec_get_context_defaults3() with a non-NULL codec. Subsequent calls will
3398 * do nothing.
3399 */
3400 int avcodec_close(AVCodecContext *avctx);
3401
3402 /**
3403 * Free all allocated data in the given subtitle struct.
3404 *
3405 * @param sub AVSubtitle to free.
3406 */
3407 void avsubtitle_free(AVSubtitle *sub);
3408
3409 /**
3410 * @}
3411 */
3412
3413 /**
3414 * @addtogroup lavc_packet
3415 * @{
3416 */
3417
3418 /**
3419 * Initialize optional fields of a packet with default values.
3420 *
3421 * Note, this does not touch the data and size members, which have to be
3422 * initialized separately.
3423 *
3424 * @param pkt packet
3425 */
3426 void av_init_packet(AVPacket *pkt);
3427
3428 /**
3429 * Allocate the payload of a packet and initialize its fields with
3430 * default values.
3431 *
3432 * @param pkt packet
3433 * @param size wanted payload size
3434 * @return 0 if OK, AVERROR_xxx otherwise
3435 */
3436 int av_new_packet(AVPacket *pkt, int size);
3437
3438 /**
3439 * Reduce packet size, correctly zeroing padding
3440 *
3441 * @param pkt packet
3442 * @param size new size
3443 */
3444 void av_shrink_packet(AVPacket *pkt, int size);
3445
3446 /**
3447 * Increase packet size, correctly zeroing padding
3448 *
3449 * @param pkt packet
3450 * @param grow_by number of bytes by which to increase the size of the packet
3451 */
3452 int av_grow_packet(AVPacket *pkt, int grow_by);
3453
3454 /**
3455 * Initialize a reference-counted packet from av_malloc()ed data.
3456 *
3457 * @param pkt packet to be initialized. This function will set the data, size,
3458 * buf and destruct fields, all others are left untouched.
3459 * @param data Data allocated by av_malloc() to be used as packet data. If this
3460 * function returns successfully, the data is owned by the underlying AVBuffer.
3461 * The caller may not access the data through other means.
3462 * @param size size of data in bytes, without the padding. I.e. the full buffer
3463 * size is assumed to be size + AV_INPUT_BUFFER_PADDING_SIZE.
3464 *
3465 * @return 0 on success, a negative AVERROR on error
3466 */
3467 int av_packet_from_data(AVPacket *pkt, uint8_t *data, int size);
3468
3469 /**
3470 * @warning This is a hack - the packet memory allocation stuff is broken. The
3471 * packet is allocated if it was not really allocated.
3472 */
3473 int av_dup_packet(AVPacket *pkt);
3474
3475 /**
3476 * Free a packet.
3477 *
3478 * @param pkt packet to free
3479 */
3480 void av_free_packet(AVPacket *pkt);
3481
3482 /**
3483 * Allocate new information of a packet.
3484 *
3485 * @param pkt packet
3486 * @param type side information type
3487 * @param size side information size
3488 * @return pointer to fresh allocated data or NULL otherwise
3489 */
3490 uint8_t* av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
3491 int size);
3492
3493 /**
3494 * Shrink the already allocated side data buffer
3495 *
3496 * @param pkt packet
3497 * @param type side information type
3498 * @param size new side information size
3499 * @return 0 on success, < 0 on failure
3500 */
3501 int av_packet_shrink_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
3502 int size);
3503
3504 /**
3505 * Get side information from packet.
3506 *
3507 * @param pkt packet
3508 * @param type desired side information type
3509 * @param size pointer for side information size to store (optional)
3510 * @return pointer to data if present or NULL otherwise
3511 */
3512 uint8_t* av_packet_get_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
3513 int *size);
3514
3515 /**
3516 * Convenience function to free all the side data stored.
3517 * All the other fields stay untouched.
3518 *
3519 * @param pkt packet
3520 */
3521 void av_packet_free_side_data(AVPacket *pkt);
3522
3523 /**
3524 * Setup a new reference to the data described by a given packet
3525 *
3526 * If src is reference-counted, setup dst as a new reference to the
3527 * buffer in src. Otherwise allocate a new buffer in dst and copy the
3528 * data from src into it.
3529 *
3530 * All the other fields are copied from src.
3531 *
3532 * @see av_packet_unref
3533 *
3534 * @param dst Destination packet
3535 * @param src Source packet
3536 *
3537 * @return 0 on success, a negative AVERROR on error.
3538 */
3539 int av_packet_ref(AVPacket *dst, AVPacket *src);
3540
3541 /**
3542 * Wipe the packet.
3543 *
3544 * Unreference the buffer referenced by the packet and reset the
3545 * remaining packet fields to their default values.
3546 *
3547 * @param pkt The packet to be unreferenced.
3548 */
3549 void av_packet_unref(AVPacket *pkt);
3550
3551 /**
3552 * Move every field in src to dst and reset src.
3553 *
3554 * @see av_packet_unref
3555 *
3556 * @param src Source packet, will be reset
3557 * @param dst Destination packet
3558 */
3559 void av_packet_move_ref(AVPacket *dst, AVPacket *src);
3560
3561 /**
3562 * Copy only "properties" fields from src to dst.
3563 *
3564 * Properties for the purpose of this function are all the fields
3565 * beside those related to the packet data (buf, data, size)
3566 *
3567 * @param dst Destination packet
3568 * @param src Source packet
3569 *
3570 * @return 0 on success AVERROR on failure.
3571 *
3572 */
3573 int av_packet_copy_props(AVPacket *dst, const AVPacket *src);
3574
3575 /**
3576 * Convert valid timing fields (timestamps / durations) in a packet from one
3577 * timebase to another. Timestamps with unknown values (AV_NOPTS_VALUE) will be
3578 * ignored.
3579 *
3580 * @param pkt packet on which the conversion will be performed
3581 * @param tb_src source timebase, in which the timing fields in pkt are
3582 * expressed
3583 * @param tb_dst destination timebase, to which the timing fields will be
3584 * converted
3585 */
3586 void av_packet_rescale_ts(AVPacket *pkt, AVRational tb_src, AVRational tb_dst);
3587
3588 /**
3589 * @}
3590 */
3591
3592 /**
3593 * @addtogroup lavc_decoding
3594 * @{
3595 */
3596
3597 /**
3598 * Find a registered decoder with a matching codec ID.
3599 *
3600 * @param id AVCodecID of the requested decoder
3601 * @return A decoder if one was found, NULL otherwise.
3602 */
3603 AVCodec *avcodec_find_decoder(enum AVCodecID id);
3604
3605 /**
3606 * Find a registered decoder with the specified name.
3607 *
3608 * @param name name of the requested decoder
3609 * @return A decoder if one was found, NULL otherwise.
3610 */
3611 AVCodec *avcodec_find_decoder_by_name(const char *name);
3612
3613 /**
3614 * The default callback for AVCodecContext.get_buffer2(). It is made public so
3615 * it can be called by custom get_buffer2() implementations for decoders without
3616 * AV_CODEC_CAP_DR1 set.
3617 */
3618 int avcodec_default_get_buffer2(AVCodecContext *s, AVFrame *frame, int flags);
3619
3620 #if FF_API_EMU_EDGE
3621 /**
3622 * Return the amount of padding in pixels which the get_buffer callback must
3623 * provide around the edge of the image for codecs which do not have the
3624 * CODEC_FLAG_EMU_EDGE flag.
3625 *
3626 * @return Required padding in pixels.
3627 *
3628 * @deprecated CODEC_FLAG_EMU_EDGE is deprecated, so this function is no longer
3629 * needed
3630 */
3631 attribute_deprecated
3632 unsigned avcodec_get_edge_width(void);
3633 #endif
3634
3635 /**
3636 * Modify width and height values so that they will result in a memory
3637 * buffer that is acceptable for the codec if you do not use any horizontal
3638 * padding.
3639 *
3640 * May only be used if a codec with AV_CODEC_CAP_DR1 has been opened.
3641 */
3642 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
3643
3644 /**
3645 * Modify width and height values so that they will result in a memory
3646 * buffer that is acceptable for the codec if you also ensure that all
3647 * line sizes are a multiple of the respective linesize_align[i].
3648 *
3649 * May only be used if a codec with AV_CODEC_CAP_DR1 has been opened.
3650 */
3651 void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
3652 int linesize_align[AV_NUM_DATA_POINTERS]);
3653
3654 /**
3655 * Decode the audio frame of size avpkt->size from avpkt->data into frame.
3656 *
3657 * Some decoders may support multiple frames in a single AVPacket. Such
3658 * decoders would then just decode the first frame and the return value would be
3659 * less than the packet size. In this case, avcodec_decode_audio4 has to be
3660 * called again with an AVPacket containing the remaining data in order to
3661 * decode the second frame, etc... Even if no frames are returned, the packet
3662 * needs to be fed to the decoder with remaining data until it is completely
3663 * consumed or an error occurs.
3664 *
3665 * Some decoders (those marked with AV_CODEC_CAP_DELAY) have a delay between input
3666 * and output. This means that for some packets they will not immediately
3667 * produce decoded output and need to be flushed at the end of decoding to get
3668 * all the decoded data. Flushing is done by calling this function with packets
3669 * with avpkt->data set to NULL and avpkt->size set to 0 until it stops
3670 * returning samples. It is safe to flush even those decoders that are not
3671 * marked with AV_CODEC_CAP_DELAY, then no samples will be returned.
3672 *
3673 * @warning The input buffer, avpkt->data must be AV_INPUT_BUFFER_PADDING_SIZE
3674 * larger than the actual read bytes because some optimized bitstream
3675 * readers read 32 or 64 bits at once and could read over the end.
3676 *
3677 * @note The AVCodecContext MUST have been opened with @ref avcodec_open2()
3678 * before packets may be fed to the decoder.
3679 *
3680 * @param avctx the codec context
3681 * @param[out] frame The AVFrame in which to store decoded audio samples.
3682 * The decoder will allocate a buffer for the decoded frame by
3683 * calling the AVCodecContext.get_buffer2() callback.
3684 * When AVCodecContext.refcounted_frames is set to 1, the frame is
3685 * reference counted and the returned reference belongs to the
3686 * caller. The caller must release the frame using av_frame_unref()
3687 * when the frame is no longer needed. The caller may safely write
3688 * to the frame if av_frame_is_writable() returns 1.
3689 * When AVCodecContext.refcounted_frames is set to 0, the returned
3690 * reference belongs to the decoder and is valid only until the
3691 * next call to this function or until closing or flushing the
3692 * decoder. The caller may not write to it.
3693 * @param[out] got_frame_ptr Zero if no frame could be decoded, otherwise it is
3694 * non-zero. Note that this field being set to zero
3695 * does not mean that an error has occurred. For
3696 * decoders with AV_CODEC_CAP_DELAY set, no given decode
3697 * call is guaranteed to produce a frame.
3698 * @param[in] avpkt The input AVPacket containing the input buffer.
3699 * At least avpkt->data and avpkt->size should be set. Some
3700 * decoders might also require additional fields to be set.
3701 * @return A negative error code is returned if an error occurred during
3702 * decoding, otherwise the number of bytes consumed from the input
3703 * AVPacket is returned.
3704 */
3705 int avcodec_decode_audio4(AVCodecContext *avctx, AVFrame *frame,
3706 int *got_frame_ptr, AVPacket *avpkt);
3707
3708 /**
3709 * Decode the video frame of size avpkt->size from avpkt->data into picture.
3710 * Some decoders may support multiple frames in a single AVPacket, such
3711 * decoders would then just decode the first frame.
3712 *
3713 * @warning The input buffer must be AV_INPUT_BUFFER_PADDING_SIZE larger than
3714 * the actual read bytes because some optimized bitstream readers read 32 or 64
3715 * bits at once and could read over the end.
3716 *
3717 * @warning The end of the input buffer buf should be set to 0 to ensure that
3718 * no overreading happens for damaged MPEG streams.
3719 *
3720 * @note Codecs which have the AV_CODEC_CAP_DELAY capability set have a delay
3721 * between input and output, these need to be fed with avpkt->data=NULL,
3722 * avpkt->size=0 at the end to return the remaining frames.
3723 *
3724 * @note The AVCodecContext MUST have been opened with @ref avcodec_open2()
3725 * before packets may be fed to the decoder.
3726 *
3727 * @param avctx the codec context
3728 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
3729 * Use av_frame_alloc() to get an AVFrame. The codec will
3730 * allocate memory for the actual bitmap by calling the
3731 * AVCodecContext.get_buffer2() callback.
3732 * When AVCodecContext.refcounted_frames is set to 1, the frame is
3733 * reference counted and the returned reference belongs to the
3734 * caller. The caller must release the frame using av_frame_unref()
3735 * when the frame is no longer needed. The caller may safely write
3736 * to the frame if av_frame_is_writable() returns 1.
3737 * When AVCodecContext.refcounted_frames is set to 0, the returned
3738 * reference belongs to the decoder and is valid only until the
3739 * next call to this function or until closing or flushing the
3740 * decoder. The caller may not write to it.
3741 *
3742 * @param[in] avpkt The input AVpacket containing the input buffer.
3743 * You can create such packet with av_init_packet() and by then setting
3744 * data and size, some decoders might in addition need other fields like
3745 * flags&AV_PKT_FLAG_KEY. All decoders are designed to use the least
3746 * fields possible.
3747 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
3748 * @return On error a negative value is returned, otherwise the number of bytes
3749 * used or zero if no frame could be decompressed.
3750 */
3751 int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
3752 int *got_picture_ptr,
3753 AVPacket *avpkt);
3754
3755 /**
3756 * Decode a subtitle message.
3757 * Return a negative value on error, otherwise return the number of bytes used.
3758 * If no subtitle could be decompressed, got_sub_ptr is zero.
3759 * Otherwise, the subtitle is stored in *sub.
3760 * Note that AV_CODEC_CAP_DR1 is not available for subtitle codecs. This is for
3761 * simplicity, because the performance difference is expect to be negligible
3762 * and reusing a get_buffer written for video codecs would probably perform badly
3763 * due to a potentially very different allocation pattern.
3764 *
3765 * @note The AVCodecContext MUST have been opened with @ref avcodec_open2()
3766 * before packets may be fed to the decoder.
3767 *
3768 * @param avctx the codec context
3769 * @param[out] sub The AVSubtitle in which the decoded subtitle will be stored, must be
3770 freed with avsubtitle_free if *got_sub_ptr is set.
3771 * @param[in,out] got_sub_ptr Zero if no subtitle could be decompressed, otherwise, it is nonzero.
3772 * @param[in] avpkt The input AVPacket containing the input buffer.
3773 */
3774 int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
3775 int *got_sub_ptr,
3776 AVPacket *avpkt);
3777
3778 /**
3779 * @defgroup lavc_parsing Frame parsing
3780 * @{
3781 */
3782
3783 enum AVPictureStructure {
3784 AV_PICTURE_STRUCTURE_UNKNOWN, //< unknown
3785 AV_PICTURE_STRUCTURE_TOP_FIELD, //< coded as top field
3786 AV_PICTURE_STRUCTURE_BOTTOM_FIELD, //< coded as bottom field
3787 AV_PICTURE_STRUCTURE_FRAME, //< coded as frame
3788 };
3789
3790 typedef struct AVCodecParserContext {
3791 void *priv_data;
3792 struct AVCodecParser *parser;
3793 int64_t frame_offset; /* offset of the current frame */
3794 int64_t cur_offset; /* current offset
3795 (incremented by each av_parser_parse()) */
3796 int64_t next_frame_offset; /* offset of the next frame */
3797 /* video info */
3798 int pict_type; /* XXX: Put it back in AVCodecContext. */
3799 /**
3800 * This field is used for proper frame duration computation in lavf.
3801 * It signals, how much longer the frame duration of the current frame
3802 * is compared to normal frame duration.
3803 *
3804 * frame_duration = (1 + repeat_pict) * time_base
3805 *
3806 * It is used by codecs like H.264 to display telecined material.
3807 */
3808 int repeat_pict; /* XXX: Put it back in AVCodecContext. */
3809 int64_t pts; /* pts of the current frame */
3810 int64_t dts; /* dts of the current frame */
3811
3812 /* private data */
3813 int64_t last_pts;
3814 int64_t last_dts;
3815 int fetch_timestamp;
3816
3817 #define AV_PARSER_PTS_NB 4
3818 int cur_frame_start_index;
3819 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
3820 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
3821 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
3822
3823 int flags;
3824 #define PARSER_FLAG_COMPLETE_FRAMES 0x0001
3825 #define PARSER_FLAG_ONCE 0x0002
3826 /// Set if the parser has a valid file offset
3827 #define PARSER_FLAG_FETCHED_OFFSET 0x0004
3828
3829 int64_t offset; ///< byte offset from starting packet start
3830 int64_t cur_frame_end[AV_PARSER_PTS_NB];
3831
3832 /**
3833 * Set by parser to 1 for key frames and 0 for non-key frames.
3834 * It is initialized to -1, so if the parser doesn't set this flag,
3835 * old-style fallback using AV_PICTURE_TYPE_I picture type as key frames
3836 * will be used.
3837 */
3838 int key_frame;
3839
3840 /**
3841 * Time difference in stream time base units from the pts of this
3842 * packet to the point at which the output from the decoder has converged
3843 * independent from the availability of previous frames. That is, the
3844 * frames are virtually identical no matter if decoding started from
3845 * the very first frame or from this keyframe.
3846 * Is AV_NOPTS_VALUE if unknown.
3847 * This field is not the display duration of the current frame.
3848 * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
3849 * set.
3850 *
3851 * The purpose of this field is to allow seeking in streams that have no
3852 * keyframes in the conventional sense. It corresponds to the
3853 * recovery point SEI in H.264 and match_time_delta in NUT. It is also
3854 * essential for some types of subtitle streams to ensure that all
3855 * subtitles are correctly displayed after seeking.
3856 */
3857 int64_t convergence_duration;
3858
3859 // Timestamp generation support:
3860 /**
3861 * Synchronization point for start of timestamp generation.
3862 *
3863 * Set to >0 for sync point, 0 for no sync point and <0 for undefined
3864 * (default).
3865 *
3866 * For example, this corresponds to presence of H.264 buffering period
3867 * SEI message.
3868 */
3869 int dts_sync_point;
3870
3871 /**