5ba021c873a3c0c88781ef84ffa9993c02aa1173
[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 * external API header
27 */
28
29 #include <errno.h>
30 #include "libavutil/samplefmt.h"
31 #include "libavutil/avutil.h"
32 #include "libavutil/cpu.h"
33 #include "libavutil/dict.h"
34 #include "libavutil/log.h"
35 #include "libavutil/pixfmt.h"
36 #include "libavutil/rational.h"
37
38 #include "libavcodec/version.h"
39 /**
40 * @defgroup libavc Encoding/Decoding Library
41 * @{
42 *
43 * @defgroup lavc_decoding Decoding
44 * @{
45 * @}
46 *
47 * @defgroup lavc_encoding Encoding
48 * @{
49 * @}
50 *
51 * @defgroup lavc_codec Codecs
52 * @{
53 * @defgroup lavc_codec_native Native Codecs
54 * @{
55 * @}
56 * @defgroup lavc_codec_wrappers External library wrappers
57 * @{
58 * @}
59 * @defgroup lavc_codec_hwaccel Hardware Accelerators bridge
60 * @{
61 * @}
62 * @}
63 * @defgroup lavc_internal Internal
64 * @{
65 * @}
66 * @}
67 *
68 */
69
70 /**
71 * @defgroup lavc_core Core functions/structures.
72 * @ingroup libavc
73 *
74 * Basic definitions, functions for querying libavcodec capabilities,
75 * allocating core structures, etc.
76 * @{
77 */
78
79 /**
80 * Identify the syntax and semantics of the bitstream.
81 * The principle is roughly:
82 * Two decoders with the same ID can decode the same streams.
83 * Two encoders with the same ID can encode compatible streams.
84 * There may be slight deviations from the principle due to implementation
85 * details.
86 *
87 * If you add a codec ID to this list, add it so that
88 * 1. no value of a existing codec ID changes (that would break ABI),
89 * 2. it is as close as possible to similar codecs.
90 */
91 enum CodecID {
92 CODEC_ID_NONE,
93
94 /* video codecs */
95 CODEC_ID_MPEG1VIDEO,
96 CODEC_ID_MPEG2VIDEO, ///< preferred ID for MPEG-1/2 video decoding
97 CODEC_ID_MPEG2VIDEO_XVMC,
98 CODEC_ID_H261,
99 CODEC_ID_H263,
100 CODEC_ID_RV10,
101 CODEC_ID_RV20,
102 CODEC_ID_MJPEG,
103 CODEC_ID_MJPEGB,
104 CODEC_ID_LJPEG,
105 CODEC_ID_SP5X,
106 CODEC_ID_JPEGLS,
107 CODEC_ID_MPEG4,
108 CODEC_ID_RAWVIDEO,
109 CODEC_ID_MSMPEG4V1,
110 CODEC_ID_MSMPEG4V2,
111 CODEC_ID_MSMPEG4V3,
112 CODEC_ID_WMV1,
113 CODEC_ID_WMV2,
114 CODEC_ID_H263P,
115 CODEC_ID_H263I,
116 CODEC_ID_FLV1,
117 CODEC_ID_SVQ1,
118 CODEC_ID_SVQ3,
119 CODEC_ID_DVVIDEO,
120 CODEC_ID_HUFFYUV,
121 CODEC_ID_CYUV,
122 CODEC_ID_H264,
123 CODEC_ID_INDEO3,
124 CODEC_ID_VP3,
125 CODEC_ID_THEORA,
126 CODEC_ID_ASV1,
127 CODEC_ID_ASV2,
128 CODEC_ID_FFV1,
129 CODEC_ID_4XM,
130 CODEC_ID_VCR1,
131 CODEC_ID_CLJR,
132 CODEC_ID_MDEC,
133 CODEC_ID_ROQ,
134 CODEC_ID_INTERPLAY_VIDEO,
135 CODEC_ID_XAN_WC3,
136 CODEC_ID_XAN_WC4,
137 CODEC_ID_RPZA,
138 CODEC_ID_CINEPAK,
139 CODEC_ID_WS_VQA,
140 CODEC_ID_MSRLE,
141 CODEC_ID_MSVIDEO1,
142 CODEC_ID_IDCIN,
143 CODEC_ID_8BPS,
144 CODEC_ID_SMC,
145 CODEC_ID_FLIC,
146 CODEC_ID_TRUEMOTION1,
147 CODEC_ID_VMDVIDEO,
148 CODEC_ID_MSZH,
149 CODEC_ID_ZLIB,
150 CODEC_ID_QTRLE,
151 CODEC_ID_SNOW,
152 CODEC_ID_TSCC,
153 CODEC_ID_ULTI,
154 CODEC_ID_QDRAW,
155 CODEC_ID_VIXL,
156 CODEC_ID_QPEG,
157 CODEC_ID_PNG,
158 CODEC_ID_PPM,
159 CODEC_ID_PBM,
160 CODEC_ID_PGM,
161 CODEC_ID_PGMYUV,
162 CODEC_ID_PAM,
163 CODEC_ID_FFVHUFF,
164 CODEC_ID_RV30,
165 CODEC_ID_RV40,
166 CODEC_ID_VC1,
167 CODEC_ID_WMV3,
168 CODEC_ID_LOCO,
169 CODEC_ID_WNV1,
170 CODEC_ID_AASC,
171 CODEC_ID_INDEO2,
172 CODEC_ID_FRAPS,
173 CODEC_ID_TRUEMOTION2,
174 CODEC_ID_BMP,
175 CODEC_ID_CSCD,
176 CODEC_ID_MMVIDEO,
177 CODEC_ID_ZMBV,
178 CODEC_ID_AVS,
179 CODEC_ID_SMACKVIDEO,
180 CODEC_ID_NUV,
181 CODEC_ID_KMVC,
182 CODEC_ID_FLASHSV,
183 CODEC_ID_CAVS,
184 CODEC_ID_JPEG2000,
185 CODEC_ID_VMNC,
186 CODEC_ID_VP5,
187 CODEC_ID_VP6,
188 CODEC_ID_VP6F,
189 CODEC_ID_TARGA,
190 CODEC_ID_DSICINVIDEO,
191 CODEC_ID_TIERTEXSEQVIDEO,
192 CODEC_ID_TIFF,
193 CODEC_ID_GIF,
194 CODEC_ID_DXA,
195 CODEC_ID_DNXHD,
196 CODEC_ID_THP,
197 CODEC_ID_SGI,
198 CODEC_ID_C93,
199 CODEC_ID_BETHSOFTVID,
200 CODEC_ID_PTX,
201 CODEC_ID_TXD,
202 CODEC_ID_VP6A,
203 CODEC_ID_AMV,
204 CODEC_ID_VB,
205 CODEC_ID_PCX,
206 CODEC_ID_SUNRAST,
207 CODEC_ID_INDEO4,
208 CODEC_ID_INDEO5,
209 CODEC_ID_MIMIC,
210 CODEC_ID_RL2,
211 CODEC_ID_ESCAPE124,
212 CODEC_ID_DIRAC,
213 CODEC_ID_BFI,
214 CODEC_ID_CMV,
215 CODEC_ID_MOTIONPIXELS,
216 CODEC_ID_TGV,
217 CODEC_ID_TGQ,
218 CODEC_ID_TQI,
219 CODEC_ID_AURA,
220 CODEC_ID_AURA2,
221 CODEC_ID_V210X,
222 CODEC_ID_TMV,
223 CODEC_ID_V210,
224 CODEC_ID_DPX,
225 CODEC_ID_MAD,
226 CODEC_ID_FRWU,
227 CODEC_ID_FLASHSV2,
228 CODEC_ID_CDGRAPHICS,
229 CODEC_ID_R210,
230 CODEC_ID_ANM,
231 CODEC_ID_BINKVIDEO,
232 CODEC_ID_IFF_ILBM,
233 CODEC_ID_IFF_BYTERUN1,
234 CODEC_ID_KGV1,
235 CODEC_ID_YOP,
236 CODEC_ID_VP8,
237 CODEC_ID_PICTOR,
238 CODEC_ID_ANSI,
239 CODEC_ID_A64_MULTI,
240 CODEC_ID_A64_MULTI5,
241 CODEC_ID_R10K,
242 CODEC_ID_MXPEG,
243 CODEC_ID_LAGARITH,
244 CODEC_ID_PRORES,
245 CODEC_ID_JV,
246 CODEC_ID_DFA,
247 CODEC_ID_WMV3IMAGE,
248 CODEC_ID_VC1IMAGE,
249 CODEC_ID_UTVIDEO,
250 CODEC_ID_BMV_VIDEO,
251 CODEC_ID_VBLE,
252 CODEC_ID_DXTORY,
253 CODEC_ID_V410,
254 CODEC_ID_XWD,
255 CODEC_ID_CDXL,
256 CODEC_ID_XBM,
257 CODEC_ID_ZEROCODEC,
258 CODEC_ID_MSS1,
259
260 /* various PCM "codecs" */
261 CODEC_ID_FIRST_AUDIO = 0x10000, ///< A dummy id pointing at the start of audio codecs
262 CODEC_ID_PCM_S16LE = 0x10000,
263 CODEC_ID_PCM_S16BE,
264 CODEC_ID_PCM_U16LE,
265 CODEC_ID_PCM_U16BE,
266 CODEC_ID_PCM_S8,
267 CODEC_ID_PCM_U8,
268 CODEC_ID_PCM_MULAW,
269 CODEC_ID_PCM_ALAW,
270 CODEC_ID_PCM_S32LE,
271 CODEC_ID_PCM_S32BE,
272 CODEC_ID_PCM_U32LE,
273 CODEC_ID_PCM_U32BE,
274 CODEC_ID_PCM_S24LE,
275 CODEC_ID_PCM_S24BE,
276 CODEC_ID_PCM_U24LE,
277 CODEC_ID_PCM_U24BE,
278 CODEC_ID_PCM_S24DAUD,
279 CODEC_ID_PCM_ZORK,
280 CODEC_ID_PCM_S16LE_PLANAR,
281 CODEC_ID_PCM_DVD,
282 CODEC_ID_PCM_F32BE,
283 CODEC_ID_PCM_F32LE,
284 CODEC_ID_PCM_F64BE,
285 CODEC_ID_PCM_F64LE,
286 CODEC_ID_PCM_BLURAY,
287 CODEC_ID_PCM_LXF,
288 CODEC_ID_S302M,
289 CODEC_ID_PCM_S8_PLANAR,
290
291 /* various ADPCM codecs */
292 CODEC_ID_ADPCM_IMA_QT = 0x11000,
293 CODEC_ID_ADPCM_IMA_WAV,
294 CODEC_ID_ADPCM_IMA_DK3,
295 CODEC_ID_ADPCM_IMA_DK4,
296 CODEC_ID_ADPCM_IMA_WS,
297 CODEC_ID_ADPCM_IMA_SMJPEG,
298 CODEC_ID_ADPCM_MS,
299 CODEC_ID_ADPCM_4XM,
300 CODEC_ID_ADPCM_XA,
301 CODEC_ID_ADPCM_ADX,
302 CODEC_ID_ADPCM_EA,
303 CODEC_ID_ADPCM_G726,
304 CODEC_ID_ADPCM_CT,
305 CODEC_ID_ADPCM_SWF,
306 CODEC_ID_ADPCM_YAMAHA,
307 CODEC_ID_ADPCM_SBPRO_4,
308 CODEC_ID_ADPCM_SBPRO_3,
309 CODEC_ID_ADPCM_SBPRO_2,
310 CODEC_ID_ADPCM_THP,
311 CODEC_ID_ADPCM_IMA_AMV,
312 CODEC_ID_ADPCM_EA_R1,
313 CODEC_ID_ADPCM_EA_R3,
314 CODEC_ID_ADPCM_EA_R2,
315 CODEC_ID_ADPCM_IMA_EA_SEAD,
316 CODEC_ID_ADPCM_IMA_EA_EACS,
317 CODEC_ID_ADPCM_EA_XAS,
318 CODEC_ID_ADPCM_EA_MAXIS_XA,
319 CODEC_ID_ADPCM_IMA_ISS,
320 CODEC_ID_ADPCM_G722,
321 CODEC_ID_ADPCM_IMA_APC,
322
323 /* AMR */
324 CODEC_ID_AMR_NB = 0x12000,
325 CODEC_ID_AMR_WB,
326
327 /* RealAudio codecs*/
328 CODEC_ID_RA_144 = 0x13000,
329 CODEC_ID_RA_288,
330
331 /* various DPCM codecs */
332 CODEC_ID_ROQ_DPCM = 0x14000,
333 CODEC_ID_INTERPLAY_DPCM,
334 CODEC_ID_XAN_DPCM,
335 CODEC_ID_SOL_DPCM,
336
337 /* audio codecs */
338 CODEC_ID_MP2 = 0x15000,
339 CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3
340 CODEC_ID_AAC,
341 CODEC_ID_AC3,
342 CODEC_ID_DTS,
343 CODEC_ID_VORBIS,
344 CODEC_ID_DVAUDIO,
345 CODEC_ID_WMAV1,
346 CODEC_ID_WMAV2,
347 CODEC_ID_MACE3,
348 CODEC_ID_MACE6,
349 CODEC_ID_VMDAUDIO,
350 CODEC_ID_FLAC,
351 CODEC_ID_MP3ADU,
352 CODEC_ID_MP3ON4,
353 CODEC_ID_SHORTEN,
354 CODEC_ID_ALAC,
355 CODEC_ID_WESTWOOD_SND1,
356 CODEC_ID_GSM, ///< as in Berlin toast format
357 CODEC_ID_QDM2,
358 CODEC_ID_COOK,
359 CODEC_ID_TRUESPEECH,
360 CODEC_ID_TTA,
361 CODEC_ID_SMACKAUDIO,
362 CODEC_ID_QCELP,
363 CODEC_ID_WAVPACK,
364 CODEC_ID_DSICINAUDIO,
365 CODEC_ID_IMC,
366 CODEC_ID_MUSEPACK7,
367 CODEC_ID_MLP,
368 CODEC_ID_GSM_MS, /* as found in WAV */
369 CODEC_ID_ATRAC3,
370 CODEC_ID_VOXWARE,
371 CODEC_ID_APE,
372 CODEC_ID_NELLYMOSER,
373 CODEC_ID_MUSEPACK8,
374 CODEC_ID_SPEEX,
375 CODEC_ID_WMAVOICE,
376 CODEC_ID_WMAPRO,
377 CODEC_ID_WMALOSSLESS,
378 CODEC_ID_ATRAC3P,
379 CODEC_ID_EAC3,
380 CODEC_ID_SIPR,
381 CODEC_ID_MP1,
382 CODEC_ID_TWINVQ,
383 CODEC_ID_TRUEHD,
384 CODEC_ID_MP4ALS,
385 CODEC_ID_ATRAC1,
386 CODEC_ID_BINKAUDIO_RDFT,
387 CODEC_ID_BINKAUDIO_DCT,
388 CODEC_ID_AAC_LATM,
389 CODEC_ID_QDMC,
390 CODEC_ID_CELT,
391 CODEC_ID_G723_1,
392 CODEC_ID_G729,
393 CODEC_ID_8SVX_EXP,
394 CODEC_ID_8SVX_FIB,
395 CODEC_ID_BMV_AUDIO,
396 CODEC_ID_RALF,
397 CODEC_ID_IAC,
398 CODEC_ID_ILBC,
399
400 /* subtitle codecs */
401 CODEC_ID_FIRST_SUBTITLE = 0x17000, ///< A dummy ID pointing at the start of subtitle codecs.
402 CODEC_ID_DVD_SUBTITLE = 0x17000,
403 CODEC_ID_DVB_SUBTITLE,
404 CODEC_ID_TEXT, ///< raw UTF-8 text
405 CODEC_ID_XSUB,
406 CODEC_ID_SSA,
407 CODEC_ID_MOV_TEXT,
408 CODEC_ID_HDMV_PGS_SUBTITLE,
409 CODEC_ID_DVB_TELETEXT,
410 CODEC_ID_SRT,
411
412 /* other specific kind of codecs (generally used for attachments) */
413 CODEC_ID_FIRST_UNKNOWN = 0x18000, ///< A dummy ID pointing at the start of various fake codecs.
414 CODEC_ID_TTF = 0x18000,
415
416 CODEC_ID_PROBE = 0x19000, ///< codec_id is not known (like CODEC_ID_NONE) but lavf should attempt to identify it
417
418 CODEC_ID_MPEG2TS = 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS
419 * stream (only used by libavformat) */
420 CODEC_ID_MPEG4SYSTEMS = 0x20001, /**< _FAKE_ codec to indicate a MPEG-4 Systems
421 * stream (only used by libavformat) */
422 CODEC_ID_FFMETADATA = 0x21000, ///< Dummy codec for streams containing only metadata information.
423 };
424
425 #if FF_API_OLD_DECODE_AUDIO
426 /* in bytes */
427 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
428 #endif
429
430 /**
431 * @ingroup lavc_decoding
432 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
433 * This is mainly needed because some optimized bitstream readers read
434 * 32 or 64 bit at once and could read over the end.<br>
435 * Note: If the first 23 bits of the additional bytes are not 0, then damaged
436 * MPEG bitstreams could cause overread and segfault.
437 */
438 #define FF_INPUT_BUFFER_PADDING_SIZE 8
439
440 /**
441 * @ingroup lavc_encoding
442 * minimum encoding buffer size
443 * Used to avoid some checks during header writing.
444 */
445 #define FF_MIN_BUFFER_SIZE 16384
446
447
448 /**
449 * @ingroup lavc_encoding
450 * motion estimation type.
451 */
452 enum Motion_Est_ID {
453 ME_ZERO = 1, ///< no search, that is use 0,0 vector whenever one is needed
454 ME_FULL,
455 ME_LOG,
456 ME_PHODS,
457 ME_EPZS, ///< enhanced predictive zonal search
458 ME_X1, ///< reserved for experiments
459 ME_HEX, ///< hexagon based search
460 ME_UMH, ///< uneven multi-hexagon search
461 ME_ITER, ///< iterative search
462 ME_TESA, ///< transformed exhaustive search algorithm
463 };
464
465 /**
466 * @ingroup lavc_decoding
467 */
468 enum AVDiscard{
469 /* We leave some space between them for extensions (drop some
470 * keyframes for intra-only or drop just some bidir frames). */
471 AVDISCARD_NONE =-16, ///< discard nothing
472 AVDISCARD_DEFAULT = 0, ///< discard useless packets like 0 size packets in avi
473 AVDISCARD_NONREF = 8, ///< discard all non reference
474 AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
475 AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
476 AVDISCARD_ALL = 48, ///< discard all
477 };
478
479 enum AVColorPrimaries{
480 AVCOL_PRI_BT709 = 1, ///< also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP177 Annex B
481 AVCOL_PRI_UNSPECIFIED = 2,
482 AVCOL_PRI_BT470M = 4,
483 AVCOL_PRI_BT470BG = 5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM
484 AVCOL_PRI_SMPTE170M = 6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC
485 AVCOL_PRI_SMPTE240M = 7, ///< functionally identical to above
486 AVCOL_PRI_FILM = 8,
487 AVCOL_PRI_NB , ///< Not part of ABI
488 };
489
490 enum AVColorTransferCharacteristic{
491 AVCOL_TRC_BT709 = 1, ///< also ITU-R BT1361
492 AVCOL_TRC_UNSPECIFIED = 2,
493 AVCOL_TRC_GAMMA22 = 4, ///< also ITU-R BT470M / ITU-R BT1700 625 PAL & SECAM
494 AVCOL_TRC_GAMMA28 = 5, ///< also ITU-R BT470BG
495 AVCOL_TRC_SMPTE240M = 7,
496 AVCOL_TRC_NB , ///< Not part of ABI
497 };
498
499 enum AVColorSpace{
500 AVCOL_SPC_RGB = 0,
501 AVCOL_SPC_BT709 = 1, ///< also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
502 AVCOL_SPC_UNSPECIFIED = 2,
503 AVCOL_SPC_FCC = 4,
504 AVCOL_SPC_BT470BG = 5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM / IEC 61966-2-4 xvYCC601
505 AVCOL_SPC_SMPTE170M = 6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC / functionally identical to above
506 AVCOL_SPC_SMPTE240M = 7,
507 AVCOL_SPC_YCOCG = 8, ///< Used by Dirac / VC-2 and H.264 FRext, see ITU-T SG16
508 AVCOL_SPC_NB , ///< Not part of ABI
509 };
510
511 enum AVColorRange{
512 AVCOL_RANGE_UNSPECIFIED = 0,
513 AVCOL_RANGE_MPEG = 1, ///< the normal 219*2^(n-8) "MPEG" YUV ranges
514 AVCOL_RANGE_JPEG = 2, ///< the normal 2^n-1 "JPEG" YUV ranges
515 AVCOL_RANGE_NB , ///< Not part of ABI
516 };
517
518 /**
519 * X X 3 4 X X are luma samples,
520 * 1 2 1-6 are possible chroma positions
521 * X X 5 6 X 0 is undefined/unknown position
522 */
523 enum AVChromaLocation{
524 AVCHROMA_LOC_UNSPECIFIED = 0,
525 AVCHROMA_LOC_LEFT = 1, ///< mpeg2/4, h264 default
526 AVCHROMA_LOC_CENTER = 2, ///< mpeg1, jpeg, h263
527 AVCHROMA_LOC_TOPLEFT = 3, ///< DV
528 AVCHROMA_LOC_TOP = 4,
529 AVCHROMA_LOC_BOTTOMLEFT = 5,
530 AVCHROMA_LOC_BOTTOM = 6,
531 AVCHROMA_LOC_NB , ///< Not part of ABI
532 };
533
534 enum AVAudioServiceType {
535 AV_AUDIO_SERVICE_TYPE_MAIN = 0,
536 AV_AUDIO_SERVICE_TYPE_EFFECTS = 1,
537 AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED = 2,
538 AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED = 3,
539 AV_AUDIO_SERVICE_TYPE_DIALOGUE = 4,
540 AV_AUDIO_SERVICE_TYPE_COMMENTARY = 5,
541 AV_AUDIO_SERVICE_TYPE_EMERGENCY = 6,
542 AV_AUDIO_SERVICE_TYPE_VOICE_OVER = 7,
543 AV_AUDIO_SERVICE_TYPE_KARAOKE = 8,
544 AV_AUDIO_SERVICE_TYPE_NB , ///< Not part of ABI
545 };
546
547 /**
548 * @ingroup lavc_encoding
549 */
550 typedef struct RcOverride{
551 int start_frame;
552 int end_frame;
553 int qscale; // If this is 0 then quality_factor will be used instead.
554 float quality_factor;
555 } RcOverride;
556
557 #define FF_MAX_B_FRAMES 16
558
559 /* encoding support
560 These flags can be passed in AVCodecContext.flags before initialization.
561 Note: Not everything is supported yet.
562 */
563
564 #define CODEC_FLAG_QSCALE 0x0002 ///< Use fixed qscale.
565 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / advanced prediction for H.263.
566 #define CODEC_FLAG_QPEL 0x0010 ///< Use qpel MC.
567 #define CODEC_FLAG_GMC 0x0020 ///< Use GMC.
568 #define CODEC_FLAG_MV0 0x0040 ///< Always try a MB with MV=<0,0>.
569 /**
570 * The parent program guarantees that the input for B-frames containing
571 * streams is not written to for at least s->max_b_frames+1 frames, if
572 * this is not set the input will be copied.
573 */
574 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
575 #define CODEC_FLAG_PASS1 0x0200 ///< Use internal 2pass ratecontrol in first pass mode.
576 #define CODEC_FLAG_PASS2 0x0400 ///< Use internal 2pass ratecontrol in second pass mode.
577 #define CODEC_FLAG_GRAY 0x2000 ///< Only decode/encode grayscale.
578 #define CODEC_FLAG_EMU_EDGE 0x4000 ///< Don't draw edges.
579 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding.
580 #define CODEC_FLAG_TRUNCATED 0x00010000 /** Input bitstream might be truncated at a random
581 location instead of only at frame boundaries. */
582 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< Normalize adaptive quantization.
583 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT.
584 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< Force low delay.
585 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< Place global headers in extradata instead of every keyframe.
586 #define CODEC_FLAG_BITEXACT 0x00800000 ///< Use only bitexact stuff (except (I)DCT).
587 /* Fx : Flag for h263+ extra options */
588 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction
589 #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
590 #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
591 #define CODEC_FLAG_CLOSED_GOP 0x80000000
592 #define CODEC_FLAG2_FAST 0x00000001 ///< Allow non spec compliant speedup tricks.
593 #define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< Skip bitstream encoding.
594 #define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< Place global headers at every keyframe instead of in extradata.
595 #if FF_API_MPV_GLOBAL_OPTS
596 #define CODEC_FLAG_CBP_RD 0x04000000 ///< Use rate distortion optimization for cbp.
597 #define CODEC_FLAG_QP_RD 0x08000000 ///< Use rate distortion optimization for qp selectioon.
598 #define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< Strictly enforce GOP size.
599 #define CODEC_FLAG2_SKIP_RD 0x00004000 ///< RD optimal MB level residual skipping
600 #endif
601 #define CODEC_FLAG2_CHUNKS 0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
602
603 /* Unsupported options :
604 * Syntax Arithmetic coding (SAC)
605 * Reference Picture Selection
606 * Independent Segment Decoding */
607 /* /Fx */
608 /* codec capabilities */
609
610 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback.
611 /**
612 * Codec uses get_buffer() for allocating buffers and supports custom allocators.
613 * If not set, it might not use get_buffer() at all or use operations that
614 * assume the buffer was allocated by avcodec_default_get_buffer.
615 */
616 #define CODEC_CAP_DR1 0x0002
617 #define CODEC_CAP_TRUNCATED 0x0008
618 /* Codec can export data for HW decoding (XvMC). */
619 #define CODEC_CAP_HWACCEL 0x0010
620 /**
621 * Encoder or decoder requires flushing with NULL input at the end in order to
622 * give the complete and correct output.
623 *
624 * NOTE: If this flag is not set, the codec is guaranteed to never be fed with
625 * with NULL data. The user can still send NULL data to the public encode
626 * or decode function, but libavcodec will not pass it along to the codec
627 * unless this flag is set.
628 *
629 * Decoders:
630 * The decoder has a non-zero delay and needs to be fed with avpkt->data=NULL,
631 * avpkt->size=0 at the end to get the delayed data until the decoder no longer
632 * returns frames.
633 *
634 * Encoders:
635 * The encoder needs to be fed with NULL data at the end of encoding until the
636 * encoder no longer returns data.
637 *
638 * NOTE: For encoders implementing the AVCodec.encode2() function, setting this
639 * flag also means that the encoder must set the pts and duration for
640 * each output packet. If this flag is not set, the pts and duration will
641 * be determined by libavcodec from the input frame.
642 */
643 #define CODEC_CAP_DELAY 0x0020
644 /**
645 * Codec can be fed a final frame with a smaller size.
646 * This can be used to prevent truncation of the last audio samples.
647 */
648 #define CODEC_CAP_SMALL_LAST_FRAME 0x0040
649 /**
650 * Codec can export data for HW decoding (VDPAU).
651 */
652 #define CODEC_CAP_HWACCEL_VDPAU 0x0080
653 /**
654 * Codec can output multiple frames per AVPacket
655 * Normally demuxers return one frame at a time, demuxers which do not do
656 * are connected to a parser to split what they return into proper frames.
657 * This flag is reserved to the very rare category of codecs which have a
658 * bitstream that cannot be split into frames without timeconsuming
659 * operations like full decoding. Demuxers carring such bitstreams thus
660 * may return multiple frames in a packet. This has many disadvantages like
661 * prohibiting stream copy in many cases thus it should only be considered
662 * as a last resort.
663 */
664 #define CODEC_CAP_SUBFRAMES 0x0100
665 /**
666 * Codec is experimental and is thus avoided in favor of non experimental
667 * encoders
668 */
669 #define CODEC_CAP_EXPERIMENTAL 0x0200
670 /**
671 * Codec should fill in channel configuration and samplerate instead of container
672 */
673 #define CODEC_CAP_CHANNEL_CONF 0x0400
674 /**
675 * Codec is able to deal with negative linesizes
676 */
677 #define CODEC_CAP_NEG_LINESIZES 0x0800
678 /**
679 * Codec supports frame-level multithreading.
680 */
681 #define CODEC_CAP_FRAME_THREADS 0x1000
682 /**
683 * Codec supports slice-based (or partition-based) multithreading.
684 */
685 #define CODEC_CAP_SLICE_THREADS 0x2000
686 /**
687 * Codec supports changed parameters at any point.
688 */
689 #define CODEC_CAP_PARAM_CHANGE 0x4000
690 /**
691 * Codec supports avctx->thread_count == 0 (auto).
692 */
693 #define CODEC_CAP_AUTO_THREADS 0x8000
694 /**
695 * Audio encoder supports receiving a different number of samples in each call.
696 */
697 #define CODEC_CAP_VARIABLE_FRAME_SIZE 0x10000
698
699 //The following defines may change, don't expect compatibility if you use them.
700 #define MB_TYPE_INTRA4x4 0x0001
701 #define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
702 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME H.264-specific
703 #define MB_TYPE_16x16 0x0008
704 #define MB_TYPE_16x8 0x0010
705 #define MB_TYPE_8x16 0x0020
706 #define MB_TYPE_8x8 0x0040
707 #define MB_TYPE_INTERLACED 0x0080
708 #define MB_TYPE_DIRECT2 0x0100 //FIXME
709 #define MB_TYPE_ACPRED 0x0200
710 #define MB_TYPE_GMC 0x0400
711 #define MB_TYPE_SKIP 0x0800
712 #define MB_TYPE_P0L0 0x1000
713 #define MB_TYPE_P1L0 0x2000
714 #define MB_TYPE_P0L1 0x4000
715 #define MB_TYPE_P1L1 0x8000
716 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
717 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
718 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
719 #define MB_TYPE_QUANT 0x00010000
720 #define MB_TYPE_CBP 0x00020000
721 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
722
723 /**
724 * Pan Scan area.
725 * This specifies the area which should be displayed.
726 * Note there may be multiple such areas for one frame.
727 */
728 typedef struct AVPanScan{
729 /**
730 * id
731 * - encoding: Set by user.
732 * - decoding: Set by libavcodec.
733 */
734 int id;
735
736 /**
737 * width and height in 1/16 pel
738 * - encoding: Set by user.
739 * - decoding: Set by libavcodec.
740 */
741 int width;
742 int height;
743
744 /**
745 * position of the top left corner in 1/16 pel for up to 3 fields/frames
746 * - encoding: Set by user.
747 * - decoding: Set by libavcodec.
748 */
749 int16_t position[3][2];
750 }AVPanScan;
751
752 #define FF_QSCALE_TYPE_MPEG1 0
753 #define FF_QSCALE_TYPE_MPEG2 1
754 #define FF_QSCALE_TYPE_H264 2
755 #define FF_QSCALE_TYPE_VP56 3
756
757 #define FF_BUFFER_TYPE_INTERNAL 1
758 #define FF_BUFFER_TYPE_USER 2 ///< direct rendering buffers (image is (de)allocated by user)
759 #define FF_BUFFER_TYPE_SHARED 4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared.
760 #define FF_BUFFER_TYPE_COPY 8 ///< Just a (modified) copy of some other buffer, don't deallocate anything.
761
762 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore).
763 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer.
764 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content.
765 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update).
766
767 /**
768 * @defgroup lavc_packet AVPacket
769 *
770 * Types and functions for working with AVPacket.
771 * @{
772 */
773 enum AVPacketSideDataType {
774 AV_PKT_DATA_PALETTE,
775 AV_PKT_DATA_NEW_EXTRADATA,
776
777 /**
778 * An AV_PKT_DATA_PARAM_CHANGE side data packet is laid out as follows:
779 * @code
780 * u32le param_flags
781 * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT)
782 * s32le channel_count
783 * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT)
784 * u64le channel_layout
785 * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE)
786 * s32le sample_rate
787 * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS)
788 * s32le width
789 * s32le height
790 * @endcode
791 */
792 AV_PKT_DATA_PARAM_CHANGE,
793
794 /**
795 * An AV_PKT_DATA_H263_MB_INFO side data packet contains a number of
796 * structures with info about macroblocks relevant to splitting the
797 * packet into smaller packets on macroblock edges (e.g. as for RFC 2190).
798 * That is, it does not necessarily contain info about all macroblocks,
799 * as long as the distance between macroblocks in the info is smaller
800 * than the target payload size.
801 * Each MB info structure is 12 bytes, and is laid out as follows:
802 * @code
803 * u32le bit offset from the start of the packet
804 * u8 current quantizer at the start of the macroblock
805 * u8 GOB number
806 * u16le macroblock address within the GOB
807 * u8 horizontal MV predictor
808 * u8 vertical MV predictor
809 * u8 horizontal MV predictor for block number 3
810 * u8 vertical MV predictor for block number 3
811 * @endcode
812 */
813 AV_PKT_DATA_H263_MB_INFO,
814 };
815
816 typedef struct AVPacket {
817 /**
818 * Presentation timestamp in AVStream->time_base units; the time at which
819 * the decompressed packet will be presented to the user.
820 * Can be AV_NOPTS_VALUE if it is not stored in the file.
821 * pts MUST be larger or equal to dts as presentation cannot happen before
822 * decompression, unless one wants to view hex dumps. Some formats misuse
823 * the terms dts and pts/cts to mean something different. Such timestamps
824 * must be converted to true pts/dts before they are stored in AVPacket.
825 */
826 int64_t pts;
827 /**
828 * Decompression timestamp in AVStream->time_base units; the time at which
829 * the packet is decompressed.
830 * Can be AV_NOPTS_VALUE if it is not stored in the file.
831 */
832 int64_t dts;
833 uint8_t *data;
834 int size;
835 int stream_index;
836 /**
837 * A combination of AV_PKT_FLAG values
838 */
839 int flags;
840 /**
841 * Additional packet data that can be provided by the container.
842 * Packet can contain several types of side information.
843 */
844 struct {
845 uint8_t *data;
846 int size;
847 enum AVPacketSideDataType type;
848 } *side_data;
849 int side_data_elems;
850
851 /**
852 * Duration of this packet in AVStream->time_base units, 0 if unknown.
853 * Equals next_pts - this_pts in presentation order.
854 */
855 int duration;
856 void (*destruct)(struct AVPacket *);
857 void *priv;
858 int64_t pos; ///< byte position in stream, -1 if unknown
859
860 /**
861 * Time difference in AVStream->time_base units from the pts of this
862 * packet to the point at which the output from the decoder has converged
863 * independent from the availability of previous frames. That is, the
864 * frames are virtually identical no matter if decoding started from
865 * the very first frame or from this keyframe.
866 * Is AV_NOPTS_VALUE if unknown.
867 * This field is not the display duration of the current packet.
868 * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
869 * set.
870 *
871 * The purpose of this field is to allow seeking in streams that have no
872 * keyframes in the conventional sense. It corresponds to the
873 * recovery point SEI in H.264 and match_time_delta in NUT. It is also
874 * essential for some types of subtitle streams to ensure that all
875 * subtitles are correctly displayed after seeking.
876 */
877 int64_t convergence_duration;
878 } AVPacket;
879 #define AV_PKT_FLAG_KEY 0x0001 ///< The packet contains a keyframe
880 #define AV_PKT_FLAG_CORRUPT 0x0002 ///< The packet content is corrupted
881
882 enum AVSideDataParamChangeFlags {
883 AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT = 0x0001,
884 AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT = 0x0002,
885 AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE = 0x0004,
886 AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS = 0x0008,
887 };
888 /**
889 * @}
890 */
891
892 /**
893 * Audio Video Frame.
894 * New fields can be added to the end of AVFRAME with minor version
895 * bumps. Removal, reordering and changes to existing fields require
896 * a major version bump.
897 * sizeof(AVFrame) must not be used outside libav*.
898 */
899 typedef struct AVFrame {
900 #define AV_NUM_DATA_POINTERS 8
901 /**
902 * pointer to the picture/channel planes.
903 * This might be different from the first allocated byte
904 * - encoding: Set by user
905 * - decoding: set by AVCodecContext.get_buffer()
906 */
907 uint8_t *data[AV_NUM_DATA_POINTERS];
908
909 /**
910 * Size, in bytes, of the data for each picture/channel plane.
911 *
912 * For audio, only linesize[0] may be set. For planar audio, each channel
913 * plane must be the same size.
914 *
915 * - encoding: Set by user
916 * - decoding: set by AVCodecContext.get_buffer()
917 */
918 int linesize[AV_NUM_DATA_POINTERS];
919
920 /**
921 * pointers to the data planes/channels.
922 *
923 * For video, this should simply point to data[].
924 *
925 * For planar audio, each channel has a separate data pointer, and
926 * linesize[0] contains the size of each channel buffer.
927 * For packed audio, there is just one data pointer, and linesize[0]
928 * contains the total size of the buffer for all channels.
929 *
930 * Note: Both data and extended_data will always be set by get_buffer(),
931 * but for planar audio with more channels that can fit in data,
932 * extended_data must be used by the decoder in order to access all
933 * channels.
934 *
935 * encoding: unused
936 * decoding: set by AVCodecContext.get_buffer()
937 */
938 uint8_t **extended_data;
939
940 /**
941 * width and height of the video frame
942 * - encoding: unused
943 * - decoding: Read by user.
944 */
945 int width, height;
946
947 /**
948 * number of audio samples (per channel) described by this frame
949 * - encoding: Set by user
950 * - decoding: Set by libavcodec
951 */
952 int nb_samples;
953
954 /**
955 * format of the frame, -1 if unknown or unset
956 * Values correspond to enum PixelFormat for video frames,
957 * enum AVSampleFormat for audio)
958 * - encoding: unused
959 * - decoding: Read by user.
960 */
961 int format;
962
963 /**
964 * 1 -> keyframe, 0-> not
965 * - encoding: Set by libavcodec.
966 * - decoding: Set by libavcodec.
967 */
968 int key_frame;
969
970 /**
971 * Picture type of the frame, see ?_TYPE below.
972 * - encoding: Set by libavcodec. for coded_picture (and set by user for input).
973 * - decoding: Set by libavcodec.
974 */
975 enum AVPictureType pict_type;
976
977 /**
978 * pointer to the first allocated byte of the picture. Can be used in get_buffer/release_buffer.
979 * This isn't used by libavcodec unless the default get/release_buffer() is used.
980 * - encoding:
981 * - decoding:
982 */
983 uint8_t *base[AV_NUM_DATA_POINTERS];
984
985 /**
986 * sample aspect ratio for the video frame, 0/1 if unknown/unspecified
987 * - encoding: unused
988 * - decoding: Read by user.
989 */
990 AVRational sample_aspect_ratio;
991
992 /**
993 * presentation timestamp in time_base units (time when frame should be shown to user)
994 * If AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed.
995 * - encoding: MUST be set by user.
996 * - decoding: Set by libavcodec.
997 */
998 int64_t pts;
999
1000 /**
1001 * reordered pts from the last AVPacket that has been input into the decoder
1002 * - encoding: unused
1003 * - decoding: Read by user.
1004 */
1005 int64_t pkt_pts;
1006
1007 /**
1008 * dts from the last AVPacket that has been input into the decoder
1009 * - encoding: unused
1010 * - decoding: Read by user.
1011 */
1012 int64_t pkt_dts;
1013
1014 /**
1015 * picture number in bitstream order
1016 * - encoding: set by
1017 * - decoding: Set by libavcodec.
1018 */
1019 int coded_picture_number;
1020 /**
1021 * picture number in display order
1022 * - encoding: set by
1023 * - decoding: Set by libavcodec.
1024 */
1025 int display_picture_number;
1026
1027 /**
1028 * quality (between 1 (good) and FF_LAMBDA_MAX (bad))
1029 * - encoding: Set by libavcodec. for coded_picture (and set by user for input).
1030 * - decoding: Set by libavcodec.
1031 */
1032 int quality;
1033
1034 /**
1035 * is this picture used as reference
1036 * The values for this are the same as the MpegEncContext.picture_structure
1037 * variable, that is 1->top field, 2->bottom field, 3->frame/both fields.
1038 * Set to 4 for delayed, non-reference frames.
1039 * - encoding: unused
1040 * - decoding: Set by libavcodec. (before get_buffer() call)).
1041 */
1042 int reference;
1043
1044 /**
1045 * QP table
1046 * - encoding: unused
1047 * - decoding: Set by libavcodec.
1048 */
1049 int8_t *qscale_table;
1050 /**
1051 * QP store stride
1052 * - encoding: unused
1053 * - decoding: Set by libavcodec.
1054 */
1055 int qstride;
1056
1057 /**
1058 *
1059 */
1060 int qscale_type;
1061
1062 /**
1063 * mbskip_table[mb]>=1 if MB didn't change
1064 * stride= mb_width = (width+15)>>4
1065 * - encoding: unused
1066 * - decoding: Set by libavcodec.
1067 */
1068 uint8_t *mbskip_table;
1069
1070 /**
1071 * motion vector table
1072 * @code
1073 * example:
1074 * int mv_sample_log2= 4 - motion_subsample_log2;
1075 * int mb_width= (width+15)>>4;
1076 * int mv_stride= (mb_width << mv_sample_log2) + 1;
1077 * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];
1078 * @endcode
1079 * - encoding: Set by user.
1080 * - decoding: Set by libavcodec.
1081 */
1082 int16_t (*motion_val[2])[2];
1083
1084 /**
1085 * macroblock type table
1086 * mb_type_base + mb_width + 2
1087 * - encoding: Set by user.
1088 * - decoding: Set by libavcodec.
1089 */
1090 uint32_t *mb_type;
1091
1092 /**
1093 * DCT coefficients
1094 * - encoding: unused
1095 * - decoding: Set by libavcodec.
1096 */
1097 short *dct_coeff;
1098
1099 /**
1100 * motion reference frame index
1101 * the order in which these are stored can depend on the codec.
1102 * - encoding: Set by user.
1103 * - decoding: Set by libavcodec.
1104 */
1105 int8_t *ref_index[2];
1106
1107 /**
1108 * for some private data of the user
1109 * - encoding: unused
1110 * - decoding: Set by user.
1111 */
1112 void *opaque;
1113
1114 /**
1115 * error
1116 * - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR.
1117 * - decoding: unused
1118 */
1119 uint64_t error[AV_NUM_DATA_POINTERS];
1120
1121 /**
1122 * type of the buffer (to keep track of who has to deallocate data[*])
1123 * - encoding: Set by the one who allocates it.
1124 * - decoding: Set by the one who allocates it.
1125 * Note: User allocated (direct rendering) & internal buffers cannot coexist currently.
1126 */
1127 int type;
1128
1129 /**
1130 * When decoding, this signals how much the picture must be delayed.
1131 * extra_delay = repeat_pict / (2*fps)
1132 * - encoding: unused
1133 * - decoding: Set by libavcodec.
1134 */
1135 int repeat_pict;
1136
1137 /**
1138 * The content of the picture is interlaced.
1139 * - encoding: Set by user.
1140 * - decoding: Set by libavcodec. (default 0)
1141 */
1142 int interlaced_frame;
1143
1144 /**
1145 * If the content is interlaced, is top field displayed first.
1146 * - encoding: Set by user.
1147 * - decoding: Set by libavcodec.
1148 */
1149 int top_field_first;
1150
1151 /**
1152 * Tell user application that palette has changed from previous frame.
1153 * - encoding: ??? (no palette-enabled encoder yet)
1154 * - decoding: Set by libavcodec. (default 0).
1155 */
1156 int palette_has_changed;
1157
1158 /**
1159 * codec suggestion on buffer type if != 0
1160 * - encoding: unused
1161 * - decoding: Set by libavcodec. (before get_buffer() call)).
1162 */
1163 int buffer_hints;
1164
1165 /**
1166 * Pan scan.
1167 * - encoding: Set by user.
1168 * - decoding: Set by libavcodec.
1169 */
1170 AVPanScan *pan_scan;
1171
1172 /**
1173 * reordered opaque 64bit (generally an integer or a double precision float
1174 * PTS but can be anything).
1175 * The user sets AVCodecContext.reordered_opaque to represent the input at
1176 * that time,
1177 * the decoder reorders values as needed and sets AVFrame.reordered_opaque
1178 * to exactly one of the values provided by the user through AVCodecContext.reordered_opaque
1179 * @deprecated in favor of pkt_pts
1180 * - encoding: unused
1181 * - decoding: Read by user.
1182 */
1183 int64_t reordered_opaque;
1184
1185 /**
1186 * hardware accelerator private data (Libav-allocated)
1187 * - encoding: unused
1188 * - decoding: Set by libavcodec
1189 */
1190 void *hwaccel_picture_private;
1191
1192 /**
1193 * the AVCodecContext which ff_thread_get_buffer() was last called on
1194 * - encoding: Set by libavcodec.
1195 * - decoding: Set by libavcodec.
1196 */
1197 struct AVCodecContext *owner;
1198
1199 /**
1200 * used by multithreading to store frame-specific info
1201 * - encoding: Set by libavcodec.
1202 * - decoding: Set by libavcodec.
1203 */
1204 void *thread_opaque;
1205
1206 /**
1207 * log2 of the size of the block which a single vector in motion_val represents:
1208 * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)
1209 * - encoding: unused
1210 * - decoding: Set by libavcodec.
1211 */
1212 uint8_t motion_subsample_log2;
1213
1214 /**
1215 * Sample rate of the audio data.
1216 *
1217 * - encoding: unused
1218 * - decoding: set by get_buffer()
1219 */
1220 int sample_rate;
1221
1222 /**
1223 * Channel layout of the audio data.
1224 *
1225 * - encoding: unused
1226 * - decoding: set by get_buffer()
1227 */
1228 uint64_t channel_layout;
1229 } AVFrame;
1230
1231 struct AVCodecInternal;
1232
1233 enum AVFieldOrder {
1234 AV_FIELD_UNKNOWN,
1235 AV_FIELD_PROGRESSIVE,
1236 AV_FIELD_TT, //< Top coded_first, top displayed first
1237 AV_FIELD_BB, //< Bottom coded first, bottom displayed first
1238 AV_FIELD_TB, //< Top coded first, bottom displayed first
1239 AV_FIELD_BT, //< Bottom coded first, top displayed first
1240 };
1241
1242 /**
1243 * main external API structure.
1244 * New fields can be added to the end with minor version bumps.
1245 * Removal, reordering and changes to existing fields require a major
1246 * version bump.
1247 * sizeof(AVCodecContext) must not be used outside libav*.
1248 */
1249 typedef struct AVCodecContext {
1250 /**
1251 * information on struct for av_log
1252 * - set by avcodec_alloc_context3
1253 */
1254 const AVClass *av_class;
1255 int log_level_offset;
1256
1257 enum AVMediaType codec_type; /* see AVMEDIA_TYPE_xxx */
1258 struct AVCodec *codec;
1259 char codec_name[32];
1260 enum CodecID codec_id; /* see CODEC_ID_xxx */
1261
1262 /**
1263 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1264 * This is used to work around some encoder bugs.
1265 * A demuxer should set this to what is stored in the field used to identify the codec.
1266 * If there are multiple such fields in a container then the demuxer should choose the one
1267 * which maximizes the information about the used codec.
1268 * If the codec tag field in a container is larger than 32 bits then the demuxer should
1269 * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
1270 * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
1271 * first.
1272 * - encoding: Set by user, if not then the default based on codec_id will be used.
1273 * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1274 */
1275 unsigned int codec_tag;
1276
1277 /**
1278 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1279 * This is used to work around some encoder bugs.
1280 * - encoding: unused
1281 * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1282 */
1283 unsigned int stream_codec_tag;
1284
1285 #if FF_API_SUB_ID
1286 /**
1287 * @deprecated this field is unused
1288 */
1289 attribute_deprecated int sub_id;
1290 #endif
1291
1292 void *priv_data;
1293
1294 /**
1295 * Private context used for internal data.
1296 *
1297 * Unlike priv_data, this is not codec-specific. It is used in general
1298 * libavcodec functions.
1299 */
1300 struct AVCodecInternal *internal;
1301
1302 /**
1303 * Private data of the user, can be used to carry app specific stuff.
1304 * - encoding: Set by user.
1305 * - decoding: Set by user.
1306 */
1307 void *opaque;
1308
1309 /**
1310 * the average bitrate
1311 * - encoding: Set by user; unused for constant quantizer encoding.
1312 * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.
1313 */
1314 int bit_rate;
1315
1316 /**
1317 * number of bits the bitstream is allowed to diverge from the reference.
1318 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
1319 * - encoding: Set by user; unused for constant quantizer encoding.
1320 * - decoding: unused
1321 */
1322 int bit_rate_tolerance;
1323
1324 /**
1325 * Global quality for codecs which cannot change it per frame.
1326 * This should be proportional to MPEG-1/2/4 qscale.
1327 * - encoding: Set by user.
1328 * - decoding: unused
1329 */
1330 int global_quality;
1331
1332 /**
1333 * - encoding: Set by user.
1334 * - decoding: unused
1335 */
1336 int compression_level;
1337 #define FF_COMPRESSION_DEFAULT -1
1338
1339 /**
1340 * CODEC_FLAG_*.
1341 * - encoding: Set by user.
1342 * - decoding: Set by user.
1343 */
1344 int flags;
1345
1346 /**
1347 * CODEC_FLAG2_*
1348 * - encoding: Set by user.
1349 * - decoding: Set by user.
1350 */
1351 int flags2;
1352
1353 /**
1354 * some codecs need / can use extradata like Huffman tables.
1355 * mjpeg: Huffman tables
1356 * rv10: additional flags
1357 * mpeg4: global headers (they can be in the bitstream or here)
1358 * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
1359 * than extradata_size to avoid prolems if it is read with the bitstream reader.
1360 * The bytewise contents of extradata must not depend on the architecture or CPU endianness.
1361 * - encoding: Set/allocated/freed by libavcodec.
1362 * - decoding: Set/allocated/freed by user.
1363 */
1364 uint8_t *extradata;
1365 int extradata_size;
1366
1367 /**
1368 * This is the fundamental unit of time (in seconds) in terms
1369 * of which frame timestamps are represented. For fixed-fps content,
1370 * timebase should be 1/framerate and timestamp increments should be
1371 * identically 1.
1372 * - encoding: MUST be set by user.
1373 * - decoding: Set by libavcodec.
1374 */
1375 AVRational time_base;
1376
1377 /**
1378 * For some codecs, the time base is closer to the field rate than the frame rate.
1379 * Most notably, H.264 and MPEG-2 specify time_base as half of frame duration
1380 * if no telecine is used ...
1381 *
1382 * Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2.
1383 */
1384 int ticks_per_frame;
1385
1386 /**
1387 * Encoder delay.
1388 *
1389 * Video:
1390 * Number of frames the decoded output will be delayed relative to the
1391 * encoded input.
1392 *
1393 * Audio:
1394 * Number of "priming" samples added to the beginning of the stream
1395 * during encoding. The decoded output will be delayed by this many
1396 * samples relative to the input to the encoder. Note that this field is
1397 * purely informational and does not directly affect the pts output by
1398 * the encoder, which should always be based on the actual presentation
1399 * time, including any delay.
1400 *
1401 * - encoding: Set by libavcodec.
1402 * - decoding: unused
1403 */
1404 int delay;
1405
1406
1407 /* video only */
1408 /**
1409 * picture width / height.
1410 * - encoding: MUST be set by user.
1411 * - decoding: Set by libavcodec.
1412 * Note: For compatibility it is possible to set this instead of
1413 * coded_width/height before decoding.
1414 */
1415 int width, height;
1416
1417 /**
1418 * Bitstream width / height, may be different from width/height.
1419 * - encoding: unused
1420 * - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
1421 */
1422 int coded_width, coded_height;
1423
1424 #define FF_ASPECT_EXTENDED 15
1425
1426 /**
1427 * the number of pictures in a group of pictures, or 0 for intra_only
1428 * - encoding: Set by user.
1429 * - decoding: unused
1430 */
1431 int gop_size;
1432
1433 /**
1434 * Pixel format, see PIX_FMT_xxx.
1435 * May be set by the demuxer if known from headers.
1436 * May be overriden by the decoder if it knows better.
1437 * - encoding: Set by user.
1438 * - decoding: Set by user if known, overridden by libavcodec if known
1439 */
1440 enum PixelFormat pix_fmt;
1441
1442 /**
1443 * Motion estimation algorithm used for video coding.
1444 * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
1445 * 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific]
1446 * - encoding: MUST be set by user.
1447 * - decoding: unused
1448 */
1449 int me_method;
1450
1451 /**
1452 * If non NULL, 'draw_horiz_band' is called by the libavcodec
1453 * decoder to draw a horizontal band. It improves cache usage. Not
1454 * all codecs can do that. You must check the codec capabilities
1455 * beforehand.
1456 * When multithreading is used, it may be called from multiple threads
1457 * at the same time; threads might draw different parts of the same AVFrame,
1458 * or multiple AVFrames, and there is no guarantee that slices will be drawn
1459 * in order.
1460 * The function is also used by hardware acceleration APIs.
1461 * It is called at least once during frame decoding to pass
1462 * the data needed for hardware render.
1463 * In that mode instead of pixel data, AVFrame points to
1464 * a structure specific to the acceleration API. The application
1465 * reads the structure and can change some fields to indicate progress
1466 * or mark state.
1467 * - encoding: unused
1468 * - decoding: Set by user.
1469 * @param height the height of the slice
1470 * @param y the y position of the slice
1471 * @param type 1->top field, 2->bottom field, 3->frame
1472 * @param offset offset into the AVFrame.data from which the slice should be read
1473 */
1474 void (*draw_horiz_band)(struct AVCodecContext *s,
1475 const AVFrame *src, int offset[AV_NUM_DATA_POINTERS],
1476 int y, int type, int height);
1477
1478 /**
1479 * callback to negotiate the pixelFormat
1480 * @param fmt is the list of formats which are supported by the codec,
1481 * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
1482 * The first is always the native one.
1483 * @return the chosen format
1484 * - encoding: unused
1485 * - decoding: Set by user, if not set the native format will be chosen.
1486 */
1487 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1488
1489 /**
1490 * maximum number of B-frames between non-B-frames
1491 * Note: The output will be delayed by max_b_frames+1 relative to the input.
1492 * - encoding: Set by user.
1493 * - decoding: unused
1494 */
1495 int max_b_frames;
1496
1497 /**
1498 * qscale factor between IP and B-frames
1499 * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
1500 * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1501 * - encoding: Set by user.
1502 * - decoding: unused
1503 */
1504 float b_quant_factor;
1505
1506 /** obsolete FIXME remove */
1507 int rc_strategy;
1508 #define FF_RC_STRATEGY_XVID 1
1509
1510 int b_frame_strategy;
1511
1512 #if FF_API_MPV_GLOBAL_OPTS
1513 /**
1514 * luma single coefficient elimination threshold
1515 * - encoding: Set by user.
1516 * - decoding: unused
1517 */
1518 attribute_deprecated int luma_elim_threshold;
1519
1520 /**
1521 * chroma single coeff elimination threshold
1522 * - encoding: Set by user.
1523 * - decoding: unused
1524 */
1525 attribute_deprecated int chroma_elim_threshold;
1526 #endif
1527
1528 /**
1529 * qscale offset between IP and B-frames
1530 * - encoding: Set by user.
1531 * - decoding: unused
1532 */
1533 float b_quant_offset;
1534
1535 /**
1536 * Size of the frame reordering buffer in the decoder.
1537 * For MPEG-2 it is 1 IPB or 0 low delay IP.
1538 * - encoding: Set by libavcodec.
1539 * - decoding: Set by libavcodec.
1540 */
1541 int has_b_frames;
1542
1543 /**
1544 * 0-> h263 quant 1-> mpeg quant
1545 * - encoding: Set by user.
1546 * - decoding: unused
1547 */
1548 int mpeg_quant;
1549
1550 /**
1551 * qscale factor between P and I-frames
1552 * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
1553 * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1554 * - encoding: Set by user.
1555 * - decoding: unused
1556 */
1557 float i_quant_factor;
1558
1559 /**
1560 * qscale offset between P and I-frames
1561 * - encoding: Set by user.
1562 * - decoding: unused
1563 */
1564 float i_quant_offset;
1565
1566 /**
1567 * luminance masking (0-> disabled)
1568 * - encoding: Set by user.
1569 * - decoding: unused
1570 */
1571 float lumi_masking;
1572
1573 /**
1574 * temporary complexity masking (0-> disabled)
1575 * - encoding: Set by user.
1576 * - decoding: unused
1577 */
1578 float temporal_cplx_masking;
1579
1580 /**
1581 * spatial complexity masking (0-> disabled)
1582 * - encoding: Set by user.
1583 * - decoding: unused
1584 */
1585 float spatial_cplx_masking;
1586
1587 /**
1588 * p block masking (0-> disabled)
1589 * - encoding: Set by user.
1590 * - decoding: unused
1591 */
1592 float p_masking;
1593
1594 /**
1595 * darkness masking (0-> disabled)
1596 * - encoding: Set by user.
1597 * - decoding: unused
1598 */
1599 float dark_masking;
1600
1601 /**
1602 * slice count
1603 * - encoding: Set by libavcodec.
1604 * - decoding: Set by user (or 0).
1605 */
1606 int slice_count;
1607 /**
1608 * prediction method (needed for huffyuv)
1609 * - encoding: Set by user.
1610 * - decoding: unused
1611 */
1612 int prediction_method;
1613 #define FF_PRED_LEFT 0
1614 #define FF_PRED_PLANE 1
1615 #define FF_PRED_MEDIAN 2
1616
1617 /**
1618 * slice offsets in the frame in bytes
1619 * - encoding: Set/allocated by libavcodec.
1620 * - decoding: Set/allocated by user (or NULL).
1621 */
1622 int *slice_offset;
1623
1624 /**
1625 * sample aspect ratio (0 if unknown)
1626 * That is the width of a pixel divided by the height of the pixel.
1627 * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
1628 * - encoding: Set by user.
1629 * - decoding: Set by libavcodec.
1630 */
1631 AVRational sample_aspect_ratio;
1632
1633 /**
1634 * motion estimation comparison function
1635 * - encoding: Set by user.
1636 * - decoding: unused
1637 */
1638 int me_cmp;
1639 /**
1640 * subpixel motion estimation comparison function
1641 * - encoding: Set by user.
1642 * - decoding: unused
1643 */
1644 int me_sub_cmp;
1645 /**
1646 * macroblock comparison function (not supported yet)
1647 * - encoding: Set by user.
1648 * - decoding: unused
1649 */
1650 int mb_cmp;
1651 /**
1652 * interlaced DCT comparison function
1653 * - encoding: Set by user.
1654 * - decoding: unused
1655 */
1656 int ildct_cmp;
1657 #define FF_CMP_SAD 0
1658 #define FF_CMP_SSE 1
1659 #define FF_CMP_SATD 2
1660 #define FF_CMP_DCT 3
1661 #define FF_CMP_PSNR 4
1662 #define FF_CMP_BIT 5
1663 #define FF_CMP_RD 6
1664 #define FF_CMP_ZERO 7
1665 #define FF_CMP_VSAD 8
1666 #define FF_CMP_VSSE 9
1667 #define FF_CMP_NSSE 10
1668 #define FF_CMP_W53 11
1669 #define FF_CMP_W97 12
1670 #define FF_CMP_DCTMAX 13
1671 #define FF_CMP_DCT264 14
1672 #define FF_CMP_CHROMA 256
1673
1674 /**
1675 * ME diamond size & shape
1676 * - encoding: Set by user.
1677 * - decoding: unused
1678 */
1679 int dia_size;
1680
1681 /**
1682 * amount of previous MV predictors (2a+1 x 2a+1 square)
1683 * - encoding: Set by user.
1684 * - decoding: unused
1685 */
1686 int last_predictor_count;
1687
1688 /**
1689 * prepass for motion estimation
1690 * - encoding: Set by user.
1691 * - decoding: unused
1692 */
1693 int pre_me;
1694
1695 /**
1696 * motion estimation prepass comparison function
1697 * - encoding: Set by user.
1698 * - decoding: unused
1699 */
1700 int me_pre_cmp;
1701
1702 /**
1703 * ME prepass diamond size & shape
1704 * - encoding: Set by user.
1705 * - decoding: unused
1706 */
1707 int pre_dia_size;
1708
1709 /**
1710 * subpel ME quality
1711 * - encoding: Set by user.
1712 * - decoding: unused
1713 */
1714 int me_subpel_quality;
1715
1716 /**
1717 * DTG active format information (additional aspect ratio
1718 * information only used in DVB MPEG-2 transport streams)
1719 * 0 if not set.
1720 *
1721 * - encoding: unused
1722 * - decoding: Set by decoder.
1723 */
1724 int dtg_active_format;
1725 #define FF_DTG_AFD_SAME 8
1726 #define FF_DTG_AFD_4_3 9
1727 #define FF_DTG_AFD_16_9 10
1728 #define FF_DTG_AFD_14_9 11
1729 #define FF_DTG_AFD_4_3_SP_14_9 13
1730 #define FF_DTG_AFD_16_9_SP_14_9 14
1731 #define FF_DTG_AFD_SP_4_3 15
1732
1733 /**
1734 * maximum motion estimation search range in subpel units
1735 * If 0 then no limit.
1736 *
1737 * - encoding: Set by user.
1738 * - decoding: unused
1739 */
1740 int me_range;
1741
1742 /**
1743 * intra quantizer bias
1744 * - encoding: Set by user.
1745 * - decoding: unused
1746 */
1747 int intra_quant_bias;
1748 #define FF_DEFAULT_QUANT_BIAS 999999
1749
1750 /**
1751 * inter quantizer bias
1752 * - encoding: Set by user.
1753 * - decoding: unused
1754 */
1755 int inter_quant_bias;
1756
1757 #if FF_API_COLOR_TABLE_ID
1758 /**
1759 * color table ID
1760 * - encoding: unused
1761 * - decoding: Which clrtable should be used for 8bit RGB images.
1762 * Tables have to be stored somewhere. FIXME
1763 */
1764 attribute_deprecated int color_table_id;
1765 #endif
1766
1767 /**
1768 * slice flags
1769 * - encoding: unused
1770 * - decoding: Set by user.
1771 */
1772 int slice_flags;
1773 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1774 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1775 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1776
1777 /**
1778 * XVideo Motion Acceleration
1779 * - encoding: forbidden
1780 * - decoding: set by decoder
1781 */
1782 int xvmc_acceleration;
1783
1784 /**
1785 * macroblock decision mode
1786 * - encoding: Set by user.
1787 * - decoding: unused
1788 */
1789 int mb_decision;
1790 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1791 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1792 #define FF_MB_DECISION_RD 2 ///< rate distortion
1793
1794 /**
1795 * custom intra quantization matrix
1796 * - encoding: Set by user, can be NULL.
1797 * - decoding: Set by libavcodec.
1798 */
1799 uint16_t *intra_matrix;
1800
1801 /**
1802 * custom inter quantization matrix
1803 * - encoding: Set by user, can be NULL.
1804 * - decoding: Set by libavcodec.
1805 */
1806 uint16_t *inter_matrix;
1807
1808 /**
1809 * scene change detection threshold
1810 * 0 is default, larger means fewer detected scene changes.
1811 * - encoding: Set by user.
1812 * - decoding: unused
1813 */
1814 int scenechange_threshold;
1815
1816 /**
1817 * noise reduction strength
1818 * - encoding: Set by user.
1819 * - decoding: unused
1820 */
1821 int noise_reduction;
1822
1823 #if FF_API_INTER_THRESHOLD
1824 /**
1825 * @deprecated this field is unused
1826 */
1827 attribute_deprecated int inter_threshold;
1828 #endif
1829
1830 #if FF_API_MPV_GLOBAL_OPTS
1831 /**
1832 * @deprecated use mpegvideo private options instead
1833 */
1834 attribute_deprecated int quantizer_noise_shaping;
1835 #endif
1836
1837 /**
1838 * Motion estimation threshold below which no motion estimation is
1839 * performed, but instead the user specified motion vectors are used.
1840 *
1841 * - encoding: Set by user.
1842 * - decoding: unused
1843 */
1844 int me_threshold;
1845
1846 /**
1847 * Macroblock threshold below which the user specified macroblock types will be used.
1848 * - encoding: Set by user.
1849 * - decoding: unused
1850 */
1851 int mb_threshold;
1852
1853 /**
1854 * precision of the intra DC coefficient - 8
1855 * - encoding: Set by user.
1856 * - decoding: unused
1857 */
1858 int intra_dc_precision;
1859
1860 /**
1861 * Number of macroblock rows at the top which are skipped.
1862 * - encoding: unused
1863 * - decoding: Set by user.
1864 */
1865 int skip_top;
1866
1867 /**
1868 * Number of macroblock rows at the bottom which are skipped.
1869 * - encoding: unused
1870 * - decoding: Set by user.
1871 */
1872 int skip_bottom;
1873
1874 /**
1875 * Border processing masking, raises the quantizer for mbs on the borders
1876 * of the picture.
1877 * - encoding: Set by user.
1878 * - decoding: unused
1879 */
1880 float border_masking;
1881
1882 /**
1883 * minimum MB lagrange multipler
1884 * - encoding: Set by user.
1885 * - decoding: unused
1886 */
1887 int mb_lmin;
1888
1889 /**
1890 * maximum MB lagrange multipler
1891 * - encoding: Set by user.
1892 * - decoding: unused
1893 */
1894 int mb_lmax;
1895
1896 /**
1897 *
1898 * - encoding: Set by user.
1899 * - decoding: unused
1900 */
1901 int me_penalty_compensation;
1902
1903 /**
1904 *
1905 * - encoding: Set by user.
1906 * - decoding: unused
1907 */
1908 int bidir_refine;
1909
1910 /**
1911 *
1912 * - encoding: Set by user.
1913 * - decoding: unused
1914 */
1915 int brd_scale;
1916
1917 /**
1918 * minimum GOP size
1919 * - encoding: Set by user.
1920 * - decoding: unused
1921 */
1922 int keyint_min;
1923
1924 /**
1925 * number of reference frames
1926 * - encoding: Set by user.
1927 * - decoding: Set by lavc.
1928 */
1929 int refs;
1930
1931 /**
1932 * chroma qp offset from luma
1933 * - encoding: Set by user.
1934 * - decoding: unused
1935 */
1936 int chromaoffset;
1937
1938 /**
1939 * Multiplied by qscale for each frame and added to scene_change_score.
1940 * - encoding: Set by user.
1941 * - decoding: unused
1942 */
1943 int scenechange_factor;
1944
1945 /**
1946 *
1947 * Note: Value depends upon the compare function used for fullpel ME.
1948 * - encoding: Set by user.
1949 * - decoding: unused
1950 */
1951 int mv0_threshold;
1952
1953 /**
1954 * Adjust sensitivity of b_frame_strategy 1.
1955 * - encoding: Set by user.
1956 * - decoding: unused
1957 */
1958 int b_sensitivity;
1959
1960 /**
1961 * Chromaticity coordinates of the source primaries.
1962 * - encoding: Set by user
1963 * - decoding: Set by libavcodec
1964 */
1965 enum AVColorPrimaries color_primaries;
1966
1967 /**
1968 * Color Transfer Characteristic.
1969 * - encoding: Set by user
1970 * - decoding: Set by libavcodec
1971 */
1972 enum AVColorTransferCharacteristic color_trc;
1973
1974 /**
1975 * YUV colorspace type.
1976 * - encoding: Set by user
1977 * - decoding: Set by libavcodec
1978 */
1979 enum AVColorSpace colorspace;
1980
1981 /**
1982 * MPEG vs JPEG YUV range.
1983 * - encoding: Set by user
1984 * - decoding: Set by libavcodec
1985 */
1986 enum AVColorRange color_range;
1987
1988 /**
1989 * This defines the location of chroma samples.
1990 * - encoding: Set by user
1991 * - decoding: Set by libavcodec
1992 */
1993 enum AVChromaLocation chroma_sample_location;
1994
1995 /**
1996 * Number of slices.
1997 * Indicates number of picture subdivisions. Used for parallelized
1998 * decoding.
1999 * - encoding: Set by user
2000 * - decoding: unused
2001 */
2002 int slices;
2003
2004 /** Field order
2005 * - encoding: set by libavcodec
2006 * - decoding: Set by libavcodec
2007 */
2008 enum AVFieldOrder field_order;
2009
2010 /* audio only */
2011 int sample_rate; ///< samples per second
2012 int channels; ///< number of audio channels
2013
2014 /**
2015 * audio sample format
2016 * - encoding: Set by user.
2017 * - decoding: Set by libavcodec.
2018 */
2019 enum AVSampleFormat sample_fmt; ///< sample format
2020
2021 /* The following data should not be initialized. */
2022 /**
2023 * Samples per packet, initialized when calling 'init'.
2024 */
2025 int frame_size;
2026
2027 /**
2028 * Frame counter, set by libavcodec.
2029 *
2030 * - decoding: total number of frames returned from the decoder so far.
2031 * - encoding: total number of frames passed to the encoder so far.
2032 *
2033 * @note the counter is not incremented if encoding/decoding resulted in
2034 * an error.
2035 */
2036 int frame_number;
2037
2038 /**
2039 * number of bytes per packet if constant and known or 0
2040 * Used by some WAV based audio codecs.
2041 */
2042 int block_align;
2043
2044 /**
2045 * Audio cutoff bandwidth (0 means "automatic")
2046 * - encoding: Set by user.
2047 * - decoding: unused
2048 */
2049 int cutoff;
2050
2051 #if FF_API_REQUEST_CHANNELS
2052 /**
2053 * Decoder should decode to this many channels if it can (0 for default)
2054 * - encoding: unused
2055 * - decoding: Set by user.
2056 * @deprecated Deprecated in favor of request_channel_layout.
2057 */
2058 int request_channels;
2059 #endif
2060
2061 /**
2062 * Audio channel layout.
2063 * - encoding: set by user.
2064 * - decoding: set by libavcodec.
2065 */
2066 uint64_t channel_layout;
2067
2068 /**
2069 * Request decoder to use this channel layout if it can (0 for default)
2070 * - encoding: unused
2071 * - decoding: Set by user.
2072 */
2073 uint64_t request_channel_layout;
2074
2075 /**
2076 * Type of service that the audio stream conveys.
2077 * - encoding: Set by user.
2078 * - decoding: Set by libavcodec.
2079 */
2080 enum AVAudioServiceType audio_service_type;
2081
2082 /**
2083 * Used to request a sample format from the decoder.
2084 * - encoding: unused.
2085 * - decoding: Set by user.
2086 */
2087 enum AVSampleFormat request_sample_fmt;
2088
2089 /**
2090 * Called at the beginning of each frame to get a buffer for it.
2091 *
2092 * The function will set AVFrame.data[], AVFrame.linesize[].
2093 * AVFrame.extended_data[] must also be set, but it should be the same as
2094 * AVFrame.data[] except for planar audio with more channels than can fit
2095 * in AVFrame.data[]. In that case, AVFrame.data[] shall still contain as
2096 * many data pointers as it can hold.
2097 *
2098 * if CODEC_CAP_DR1 is not set then get_buffer() must call
2099 * avcodec_default_get_buffer() instead of providing buffers allocated by
2100 * some other means.
2101 *
2102 * AVFrame.data[] should be 32- or 16-byte-aligned unless the CPU doesn't
2103 * need it. avcodec_default_get_buffer() aligns the output buffer properly,
2104 * but if get_buffer() is overridden then alignment considerations should
2105 * be taken into account.
2106 *
2107 * @see avcodec_default_get_buffer()
2108 *
2109 * Video:
2110 *
2111 * If pic.reference is set then the frame will be read later by libavcodec.
2112 * avcodec_align_dimensions2() should be used to find the required width and
2113 * height, as they normally need to be rounded up to the next multiple of 16.
2114 *
2115 * If frame multithreading is used and thread_safe_callbacks is set,
2116 * it may be called from a different thread, but not from more than one at
2117 * once. Does not need to be reentrant.
2118 *
2119 * @see release_buffer(), reget_buffer()
2120 * @see avcodec_align_dimensions2()
2121 *
2122 * Audio:
2123 *
2124 * Decoders request a buffer of a particular size by setting
2125 * AVFrame.nb_samples prior to calling get_buffer(). The decoder may,
2126 * however, utilize only part of the buffer by setting AVFrame.nb_samples
2127 * to a smaller value in the output frame.
2128 *
2129 * Decoders cannot use the buffer after returning from
2130 * avcodec_decode_audio4(), so they will not call release_buffer(), as it
2131 * is assumed to be released immediately upon return.
2132 *
2133 * As a convenience, av_samples_get_buffer_size() and
2134 * av_samples_fill_arrays() in libavutil may be used by custom get_buffer()
2135 * functions to find the required data size and to fill data pointers and
2136 * linesize. In AVFrame.linesize, only linesize[0] may be set for audio
2137 * since all planes must be the same size.
2138 *
2139 * @see av_samples_get_buffer_size(), av_samples_fill_arrays()
2140 *
2141 * - encoding: unused
2142 * - decoding: Set by libavcodec, user can override.
2143 */
2144 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
2145
2146 /**
2147 * Called to release buffers which were allocated with get_buffer.
2148 * A released buffer can be reused in get_buffer().
2149 * pic.data[*] must be set to NULL.
2150 * May be called from a different thread if frame multithreading is used,
2151 * but not by more than one thread at once, so does not need to be reentrant.
2152 * - encoding: unused
2153 * - decoding: Set by libavcodec, user can override.
2154 */
2155 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
2156
2157 /**
2158 * Called at the beginning of a frame to get cr buffer for it.
2159 * Buffer type (size, hints) must be the same. libavcodec won't check it.
2160 * libavcodec will pass previous buffer in pic, function should return
2161 * same buffer or new buffer with old frame "painted" into it.
2162 * If pic.data[0] == NULL must behave like get_buffer().
2163 * if CODEC_CAP_DR1 is not set then reget_buffer() must call
2164 * avcodec_default_reget_buffer() instead of providing buffers allocated by
2165 * some other means.
2166 * - encoding: unused
2167 * - decoding: Set by libavcodec, user can override.
2168 */
2169 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
2170
2171
2172 /* - encoding parameters */
2173 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
2174 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
2175
2176 /**
2177 * minimum quantizer
2178 * - encoding: Set by user.
2179 * - decoding: unused
2180 */
2181 int qmin;
2182
2183 /**
2184 * maximum quantizer
2185 * - encoding: Set by user.
2186 * - decoding: unused
2187 */
2188 int qmax;
2189
2190 /**
2191 * maximum quantizer difference between frames
2192 * - encoding: Set by user.
2193 * - decoding: unused
2194 */
2195 int max_qdiff;
2196
2197 /**
2198 * ratecontrol qmin qmax limiting method
2199 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
2200 * - encoding: Set by user.
2201 * - decoding: unused
2202 */
2203 float rc_qsquish;
2204
2205 float rc_qmod_amp;
2206 int rc_qmod_freq;
2207
2208 /**
2209 * decoder bitstream buffer size
2210 * - encoding: Set by user.
2211 * - decoding: unused
2212 */
2213 int rc_buffer_size;
2214
2215 /**
2216 * ratecontrol override, see RcOverride
2217 * - encoding: Allocated/set/freed by user.
2218 * - decoding: unused
2219 */
2220 int rc_override_count;
2221 RcOverride *rc_override;
2222
2223 /**
2224 * rate control equation
2225 * - encoding: Set by user
2226 * - decoding: unused
2227 */
2228 const char *rc_eq;
2229
2230 /**
2231 * maximum bitrate
2232 * - encoding: Set by user.
2233 * - decoding: unused
2234 */
2235 int rc_max_rate;
2236
2237 /**
2238 * minimum bitrate
2239 * - encoding: Set by user.
2240 * - decoding: unused
2241 */
2242 int rc_min_rate;
2243
2244 float rc_buffer_aggressivity;
2245
2246 /**
2247 * initial complexity for pass1 ratecontrol
2248 * - encoding: Set by user.
2249 * - decoding: unused
2250 */
2251 float rc_initial_cplx;
2252
2253 /**
2254 * Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow.
2255 * - encoding: Set by user.
2256 * - decoding: unused.
2257 */
2258 float rc_max_available_vbv_use;
2259
2260 /**
2261 * Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow.
2262 * - encoding: Set by user.
2263 * - decoding: unused.
2264 */
2265 float rc_min_vbv_overflow_use;
2266
2267 /**
2268 * Number of bits which should be loaded into the rc buffer before decoding starts.
2269 * - encoding: Set by user.
2270 * - decoding: unused
2271 */
2272 int rc_initial_buffer_occupancy;
2273
2274 #define FF_CODER_TYPE_VLC 0
2275 #define FF_CODER_TYPE_AC 1
2276 #define FF_CODER_TYPE_RAW 2
2277 #define FF_CODER_TYPE_RLE 3
2278 #define FF_CODER_TYPE_DEFLATE 4
2279 /**
2280 * coder type
2281 * - encoding: Set by user.
2282 * - decoding: unused
2283 */
2284 int coder_type;
2285
2286 /**
2287 * context model
2288 * - encoding: Set by user.
2289 * - decoding: unused
2290 */
2291 int context_model;
2292
2293 /**
2294 * minimum Lagrange multipler
2295 * - encoding: Set by user.
2296 * - decoding: unused
2297 */
2298 int lmin;
2299
2300 /**
2301 * maximum Lagrange multipler
2302 * - encoding: Set by user.
2303 * - decoding: unused
2304 */
2305 int lmax;
2306
2307 /**
2308 * frame skip threshold
2309 * - encoding: Set by user.
2310 * - decoding: unused
2311 */
2312 int frame_skip_threshold;
2313
2314 /**
2315 * frame skip factor
2316 * - encoding: Set by user.
2317 * - decoding: unused
2318 */
2319 int frame_skip_factor;
2320
2321 /**
2322 * frame skip exponent
2323 * - encoding: Set by user.
2324 * - decoding: unused
2325 */
2326 int frame_skip_exp;
2327
2328 /**
2329 * frame skip comparison function
2330 * - encoding: Set by user.
2331 * - decoding: unused
2332 */
2333 int frame_skip_cmp;
2334
2335 /**
2336 * trellis RD quantization
2337 * - encoding: Set by user.
2338 * - decoding: unused
2339 */
2340 int trellis;
2341
2342 /**
2343 * - encoding: Set by user.
2344 * - decoding: unused
2345 */
2346 int min_prediction_order;
2347
2348 /**
2349 * - encoding: Set by user.
2350 * - decoding: unused
2351 */
2352 int max_prediction_order;
2353
2354 /**
2355 * GOP timecode frame start number, in non drop frame format
2356 * - encoding: Set by user.
2357 * - decoding: unused
2358 */
2359 int64_t timecode_frame_start;
2360
2361 /* The RTP callback: This function is called */
2362 /* every time the encoder has a packet to send. */
2363 /* It depends on the encoder if the data starts */
2364 /* with a Start Code (it should). H.263 does. */
2365 /* mb_nb contains the number of macroblocks */
2366 /* encoded in the RTP payload. */
2367 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
2368
2369 int rtp_payload_size; /* The size of the RTP payload: the coder will */
2370 /* do its best to deliver a chunk with size */
2371 /* below rtp_payload_size, the chunk will start */
2372 /* with a start code on some codecs like H.263. */
2373 /* This doesn't take account of any particular */
2374 /* headers inside the transmitted RTP payload. */
2375
2376 /* statistics, used for 2-pass encoding */
2377 int mv_bits;
2378 int header_bits;
2379 int i_tex_bits;
2380 int p_tex_bits;
2381 int i_count;
2382 int p_count;
2383 int skip_count;
2384 int misc_bits;
2385
2386 /**
2387 * number of bits used for the previously encoded frame
2388 * - encoding: Set by libavcodec.
2389 * - decoding: unused
2390 */
2391 int frame_bits;
2392
2393 /**
2394 * pass1 encoding statistics output buffer
2395 * - encoding: Set by libavcodec.
2396 * - decoding: unused
2397 */
2398 char *stats_out;
2399
2400 /**
2401 * pass2 encoding statistics input buffer
2402 * Concatenated stuff from stats_out of pass1 should be placed here.
2403 * - encoding: Allocated/set/freed by user.
2404 * - decoding: unused
2405 */
2406 char *stats_in;
2407
2408 /**
2409 * Work around bugs in encoders which sometimes cannot be detected automatically.
2410 * - encoding: Set by user
2411 * - decoding: Set by user
2412 */
2413 int workaround_bugs;
2414 #define FF_BUG_AUTODETECT 1 ///< autodetection
2415 #define FF_BUG_OLD_MSMPEG4 2
2416 #define FF_BUG_XVID_ILACE 4
2417 #define FF_BUG_UMP4 8
2418 #define FF_BUG_NO_PADDING 16
2419 #define FF_BUG_AMV 32
2420 #define FF_BUG_AC_VLC 0 ///< Will be removed, libavcodec can now handle these non-compliant files by default.
2421 #define FF_BUG_QPEL_CHROMA 64
2422 #define FF_BUG_STD_QPEL 128
2423 #define FF_BUG_QPEL_CHROMA2 256
2424 #define FF_BUG_DIRECT_BLOCKSIZE 512
2425 #define FF_BUG_EDGE 1024
2426 #define FF_BUG_HPEL_CHROMA 2048
2427 #define FF_BUG_DC_CLIP 4096
2428 #define FF_BUG_MS 8192 ///< Work around various bugs in Microsoft's broken decoders.
2429 #define FF_BUG_TRUNCATED 16384
2430
2431 /**
2432 * strictly follow the standard (MPEG4, ...).
2433 * - encoding: Set by user.
2434 * - decoding: Set by user.
2435 * Setting this to STRICT or higher means the encoder and decoder will
2436 * generally do stupid things, whereas setting it to unofficial or lower
2437 * will mean the encoder might produce output that is not supported by all
2438 * spec-compliant decoders. Decoders don't differentiate between normal,
2439 * unofficial and experimental (that is, they always try to decode things
2440 * when they can) unless they are explicitly asked to behave stupidly
2441 * (=strictly conform to the specs)
2442 */
2443 int strict_std_compliance;
2444 #define FF_COMPLIANCE_VERY_STRICT 2 ///< Strictly conform to an older more strict version of the spec or reference software.
2445 #define FF_COMPLIANCE_STRICT 1 ///< Strictly conform to all the things in the spec no matter what consequences.
2446 #define FF_COMPLIANCE_NORMAL 0
2447 #define FF_COMPLIANCE_UNOFFICIAL -1 ///< Allow unofficial extensions
2448 #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
2449
2450 /**
2451 * error concealment flags
2452 * - encoding: unused
2453 * - decoding: Set by user.
2454 */
2455 int error_concealment;
2456 #define FF_EC_GUESS_MVS 1
2457 #define FF_EC_DEBLOCK 2
2458
2459 /**
2460 * debug
2461 * - encoding: Set by user.
2462 * - decoding: Set by user.
2463 */
2464 int debug;
2465 #define FF_DEBUG_PICT_INFO 1
2466 #define FF_DEBUG_RC 2
2467 #define FF_DEBUG_BITSTREAM 4
2468 #define FF_DEBUG_MB_TYPE 8
2469 #define FF_DEBUG_QP 16
2470 #define FF_DEBUG_MV 32
2471 #define FF_DEBUG_DCT_COEFF 0x00000040
2472 #define FF_DEBUG_SKIP 0x00000080
2473 #define FF_DEBUG_STARTCODE 0x00000100
2474 #define FF_DEBUG_PTS 0x00000200
2475 #define FF_DEBUG_ER 0x00000400
2476 #define FF_DEBUG_MMCO 0x00000800
2477 #define FF_DEBUG_BUGS 0x00001000
2478 #define FF_DEBUG_VIS_QP 0x00002000
2479 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
2480 #define FF_DEBUG_BUFFERS 0x00008000
2481 #define FF_DEBUG_THREADS 0x00010000
2482
2483 /**
2484 * debug
2485 * - encoding: Set by user.
2486 * - decoding: Set by user.
2487 */
2488 int debug_mv;
2489 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
2490 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
2491 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
2492
2493 /**
2494 * Error recognition; may misdetect some more or less valid parts as errors.
2495 * - encoding: unused
2496 * - decoding: Set by user.
2497 */
2498 int err_recognition;
2499 #define AV_EF_CRCCHECK (1<<0)
2500 #define AV_EF_BITSTREAM (1<<1)
2501 #define AV_EF_BUFFER (1<<2)
2502 #define AV_EF_EXPLODE (1<<3)
2503
2504 /**
2505 * opaque 64bit number (generally a PTS) that will be reordered and
2506 * output in AVFrame.reordered_opaque
2507 * @deprecated in favor of pkt_pts
2508 * - encoding: unused
2509 * - decoding: Set by user.
2510 */
2511 int64_t reordered_opaque;
2512
2513 /**
2514 * Hardware accelerator in use
2515 * - encoding: unused.
2516 * - decoding: Set by libavcodec
2517 */
2518 struct AVHWAccel *hwaccel;
2519
2520 /**
2521 * Hardware accelerator context.
2522 * For some hardware accelerators, a global context needs to be
2523 * provided by the user. In that case, this holds display-dependent
2524 * data Libav cannot instantiate itself. Please refer to the
2525 * Libav HW accelerator documentation to know how to fill this
2526 * is. e.g. for VA API, this is a struct vaapi_context.
2527 * - encoding: unused
2528 * - decoding: Set by user
2529 */
2530 void *hwaccel_context;
2531
2532 /**
2533 * error
2534 * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
2535 * - decoding: unused
2536 */
2537 uint64_t error[AV_NUM_DATA_POINTERS];
2538
2539 /**
2540 * DCT algorithm, see FF_DCT_* below
2541 * - encoding: Set by user.
2542 * - decoding: unused
2543 */
2544 int dct_algo;
2545 #define FF_DCT_AUTO 0
2546 #define FF_DCT_FASTINT 1
2547 #define FF_DCT_INT 2
2548 #define FF_DCT_MMX 3
2549 #define FF_DCT_ALTIVEC 5
2550 #define FF_DCT_FAAN 6
2551
2552 /**
2553 * IDCT algorithm, see FF_IDCT_* below.
2554 * - encoding: Set by user.
2555 * - decoding: Set by user.
2556 */
2557 int idct_algo;
2558 #define FF_IDCT_AUTO 0
2559 #define FF_IDCT_INT 1
2560 #define FF_IDCT_SIMPLE 2
2561 #define FF_IDCT_SIMPLEMMX 3
2562 #define FF_IDCT_LIBMPEG2MMX 4
2563 #define FF_IDCT_MMI 5
2564 #define FF_IDCT_ARM 7
2565 #define FF_IDCT_ALTIVEC 8
2566 #define FF_IDCT_SH4 9
2567 #define FF_IDCT_SIMPLEARM 10
2568 #define FF_IDCT_H264 11
2569 #define FF_IDCT_VP3 12
2570 #define FF_IDCT_IPP 13
2571 #define FF_IDCT_XVIDMMX 14
2572 #define FF_IDCT_CAVS 15
2573 #define FF_IDCT_SIMPLEARMV5TE 16
2574 #define FF_IDCT_SIMPLEARMV6 17
2575 #define FF_IDCT_SIMPLEVIS 18
2576 #define FF_IDCT_WMV2 19
2577 #define FF_IDCT_FAAN 20
2578 #define FF_IDCT_EA 21
2579 #define FF_IDCT_SIMPLENEON 22
2580 #define FF_IDCT_SIMPLEALPHA 23
2581 #define FF_IDCT_BINK 24
2582
2583 #if FF_API_DSP_MASK
2584 /**
2585 * Unused.
2586 * @deprecated use av_set_cpu_flags_mask() instead.
2587 */
2588 attribute_deprecated unsigned dsp_mask;
2589 #endif
2590
2591 /**
2592 * bits per sample/pixel from the demuxer (needed for huffyuv).
2593 * - encoding: Set by libavcodec.
2594 * - decoding: Set by user.
2595 */
2596 int bits_per_coded_sample;
2597
2598 /**
2599 * Bits per sample/pixel of internal libavcodec pixel/sample format.
2600 * - encoding: set by user.
2601 * - decoding: set by libavcodec.
2602 */
2603 int bits_per_raw_sample;
2604
2605 /**
2606 * low resolution decoding, 1-> 1/2 size, 2->1/4 size
2607 * - encoding: unused
2608 * - decoding: Set by user.
2609 */
2610 attribute_deprecated int lowres;
2611
2612 /**
2613 * the picture in the bitstream
2614 * - encoding: Set by libavcodec.
2615 * - decoding: Set by libavcodec.
2616 */
2617 AVFrame *coded_frame;
2618
2619 /**
2620 * thread count
2621 * is used to decide how many independent tasks should be passed to execute()
2622 * - encoding: Set by user.
2623 * - decoding: Set by user.
2624 */
2625 int thread_count;
2626
2627 /**
2628 * Which multithreading methods to use.
2629 * Use of FF_THREAD_FRAME will increase decoding delay by one frame per thread,
2630 * so clients which cannot provide future frames should not use it.
2631 *
2632 * - encoding: Set by user, otherwise the default is used.
2633 * - decoding: Set by user, otherwise the default is used.
2634 */
2635 int thread_type;
2636 #define FF_THREAD_FRAME 1 ///< Decode more than one frame at once
2637 #define FF_THREAD_SLICE 2 ///< Decode more than one part of a single frame at once
2638
2639 /**
2640 * Which multithreading methods are in use by the codec.
2641 * - encoding: Set by libavcodec.
2642 * - decoding: Set by libavcodec.
2643 */
2644 int active_thread_type;
2645
2646 /**
2647 * Set by the client if its custom get_buffer() callback can be called
2648 * synchronously from another thread, which allows faster multithreaded decoding.
2649 * draw_horiz_band() will be called from other threads regardless of this setting.
2650 * Ignored if the default get_buffer() is used.
2651 * - encoding: Set by user.
2652 * - decoding: Set by user.
2653 */
2654 int thread_safe_callbacks;
2655
2656 /**
2657 * The codec may call this to execute several independent things.
2658 * It will return only after finishing all tasks.
2659 * The user may replace this with some multithreaded implementation,
2660 * the default implementation will execute the parts serially.
2661 * @param count the number of things to execute
2662 * - encoding: Set by libavcodec, user can override.
2663 * - decoding: Set by libavcodec, user can override.
2664 */
2665 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size);
2666
2667 /**
2668 * The codec may call this to execute several independent things.
2669 * It will return only after finishing all tasks.
2670 * The user may replace this with some multithreaded implementation,
2671 * the default implementation will execute the parts serially.
2672 * Also see avcodec_thread_init and e.g. the --enable-pthread configure option.
2673 * @param c context passed also to func
2674 * @param count the number of things to execute
2675 * @param arg2 argument passed unchanged to func
2676 * @param ret return values of executed functions, must have space for "count" values. May be NULL.
2677 * @param func function that will be called count times, with jobnr from 0 to count-1.
2678 * threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no
2679 * two instances of func executing at the same time will have the same threadnr.
2680 * @return always 0 currently, but code should handle a future improvement where when any call to func
2681 * returns < 0 no further calls to func may be done and < 0 is returned.
2682 * - encoding: Set by libavcodec, user can override.
2683 * - decoding: Set by libavcodec, user can override.
2684 */
2685 int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count);
2686
2687 /**
2688 * thread opaque
2689 * Can be used by execute() to store some per AVCodecContext stuff.
2690 * - encoding: set by execute()
2691 * - decoding: set by execute()
2692 */
2693 void *thread_opaque;
2694
2695 /**
2696 * noise vs. sse weight for the nsse comparsion function
2697 * - encoding: Set by user.
2698 * - decoding: unused
2699 */
2700 int nsse_weight;
2701
2702 /**
2703 * profile
2704 * - encoding: Set by user.
2705 * - decoding: Set by libavcodec.
2706 */
2707 int profile;
2708 #define FF_PROFILE_UNKNOWN -99
2709 #define FF_PROFILE_RESERVED -100
2710
2711 #define FF_PROFILE_AAC_MAIN 0
2712 #define FF_PROFILE_AAC_LOW 1
2713 #define FF_PROFILE_AAC_SSR 2
2714 #define FF_PROFILE_AAC_LTP 3
2715
2716 #define FF_PROFILE_DTS 20
2717 #define FF_PROFILE_DTS_ES 30
2718 #define FF_PROFILE_DTS_96_24 40
2719 #define FF_PROFILE_DTS_HD_HRA 50
2720 #define FF_PROFILE_DTS_HD_MA 60
2721
2722 #define FF_PROFILE_MPEG2_422 0
2723 #define FF_PROFILE_MPEG2_HIGH 1
2724 #define FF_PROFILE_MPEG2_SS 2
2725 #define FF_PROFILE_MPEG2_SNR_SCALABLE 3
2726 #define FF_PROFILE_MPEG2_MAIN 4
2727 #define FF_PROFILE_MPEG2_SIMPLE 5
2728
2729 #define FF_PROFILE_H264_CONSTRAINED (1<<9) // 8+1; constraint_set1_flag
2730 #define FF_PROFILE_H264_INTRA (1<<11) // 8+3; constraint_set3_flag
2731
2732 #define FF_PROFILE_H264_BASELINE 66
2733 #define FF_PROFILE_H264_CONSTRAINED_BASELINE (66|FF_PROFILE_H264_CONSTRAINED)
2734 #define FF_PROFILE_H264_MAIN 77
2735 #define FF_PROFILE_H264_EXTENDED 88
2736 #define FF_PROFILE_H264_HIGH 100
2737 #define FF_PROFILE_H264_HIGH_10 110
2738 #define FF_PROFILE_H264_HIGH_10_INTRA (110|FF_PROFILE_H264_INTRA)
2739 #define FF_PROFILE_H264_HIGH_422 122
2740 #define FF_PROFILE_H264_HIGH_422_INTRA (122|FF_PROFILE_H264_INTRA)
2741 #define FF_PROFILE_H264_HIGH_444 144
2742 #define FF_PROFILE_H264_HIGH_444_PREDICTIVE 244
2743 #define FF_PROFILE_H264_HIGH_444_INTRA (244|FF_PROFILE_H264_INTRA)
2744 #define FF_PROFILE_H264_CAVLC_444 44
2745
2746 #define FF_PROFILE_VC1_SIMPLE 0
2747 #define FF_PROFILE_VC1_MAIN 1
2748 #define FF_PROFILE_VC1_COMPLEX 2
2749 #define FF_PROFILE_VC1_ADVANCED 3
2750
2751 #define FF_PROFILE_MPEG4_SIMPLE 0
2752 #define FF_PROFILE_MPEG4_SIMPLE_SCALABLE 1
2753 #define FF_PROFILE_MPEG4_CORE 2
2754 #define FF_PROFILE_MPEG4_MAIN 3
2755 #define FF_PROFILE_MPEG4_N_BIT 4
2756 #define FF_PROFILE_MPEG4_SCALABLE_TEXTURE 5
2757 #define FF_PROFILE_MPEG4_SIMPLE_FACE_ANIMATION 6
2758 #define FF_PROFILE_MPEG4_BASIC_ANIMATED_TEXTURE 7
2759 #define FF_PROFILE_MPEG4_HYBRID 8
2760 #define FF_PROFILE_MPEG4_ADVANCED_REAL_TIME 9
2761 #define FF_PROFILE_MPEG4_CORE_SCALABLE 10
2762 #define FF_PROFILE_MPEG4_ADVANCED_CODING 11
2763 #define FF_PROFILE_MPEG4_ADVANCED_CORE 12
2764 #define FF_PROFILE_MPEG4_ADVANCED_SCALABLE_TEXTURE 13
2765 #define FF_PROFILE_MPEG4_SIMPLE_STUDIO 14
2766 #define FF_PROFILE_MPEG4_ADVANCED_SIMPLE 15
2767
2768 /**
2769 * level
2770 * - encoding: Set by user.
2771 * - decoding: Set by libavcodec.
2772 */
2773 int level;
2774 #define FF_LEVEL_UNKNOWN -99
2775
2776 /**
2777 *
2778 * - encoding: unused
2779 * - decoding: Set by user.
2780 */
2781 enum AVDiscard skip_loop_filter;
2782
2783 /**
2784 *
2785 * - encoding: unused
2786 * - decoding: Set by user.
2787 */
2788 enum AVDiscard skip_idct;
2789
2790 /**
2791 *
2792 * - encoding: unused
2793 * - decoding: Set by user.
2794 */
2795 enum AVDiscard skip_frame;
2796
2797 /**
2798 * Header containing style information for text subtitles.
2799 * For SUBTITLE_ASS subtitle type, it should contain the whole ASS
2800 * [Script Info] and [V4+ Styles] section, plus the [Events] line and
2801 * the Format line following. It shouldn't include any Dialogue line.
2802 * - encoding: Set/allocated/freed by user (before avcodec_open2())
2803 * - decoding: Set/allocated/freed by libavcodec (by avcodec_open2())
2804 */
2805 uint8_t *subtitle_header;
2806 int subtitle_header_size;
2807
2808 /**
2809 * Simulates errors in the bitstream to test error concealment.
2810 * - encoding: Set by user.
2811 * - decoding: unused
2812 */
2813 int error_rate;
2814
2815 /**
2816 * Current packet as passed into the decoder, to avoid having
2817 * to pass the packet into every function. Currently only valid
2818 * inside lavc and get/release_buffer callbacks.
2819 * - decoding: set by avcodec_decode_*, read by get_buffer() for setting pkt_pts
2820 * - encoding: unused
2821 */
2822 AVPacket *pkt;
2823
2824 /**
2825 * VBV delay coded in the last frame (in periods of a 27 MHz clock).
2826 * Used for compliant TS muxing.
2827 * - encoding: Set by libavcodec.
2828 * - decoding: unused.
2829 */
2830 uint64_t vbv_delay;
2831 } AVCodecContext;
2832
2833 /**
2834 * AVProfile.
2835 */
2836 typedef struct AVProfile {
2837 int profile;
2838 const char *name; ///< short name for the profile
2839 } AVProfile;
2840
2841 typedef struct AVCodecDefault AVCodecDefault;
2842
2843 /**
2844 * AVCodec.
2845 */
2846 typedef struct AVCodec {
2847 /**
2848 * Name of the codec implementation.
2849 * The name is globally unique among encoders and among decoders (but an
2850 * encoder and a decoder can share the same name).
2851 * This is the primary way to find a codec from the user perspective.
2852 */
2853 const char *name;
2854 /**
2855 * Descriptive name for the codec, meant to be more human readable than name.
2856 * You should use the NULL_IF_CONFIG_SMALL() macro to define it.
2857 */
2858 const char *long_name;
2859 enum AVMediaType type;
2860 enum CodecID id;
2861 /**
2862 * Codec capabilities.
2863 * see CODEC_CAP_*
2864 */
2865 int capabilities;
2866 const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0}
2867 const enum PixelFormat *pix_fmts; ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1
2868 const int *supported_samplerates; ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
2869 const enum AVSampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1
2870 const uint64_t *channel_layouts; ///< array of support channel layouts, or NULL if unknown. array is terminated by 0
2871 attribute_deprecated uint8_t max_lowres; ///< maximum value for lowres supported by the decoder
2872 const AVClass *priv_class; ///< AVClass for the private context
2873 const AVProfile *profiles; ///< array of recognized profiles, or NULL if unknown, array is terminated by {FF_PROFILE_UNKNOWN}
2874
2875 /*****************************************************************
2876 * No fields below this line are part of the public API. They
2877 * may not be used outside of libavcodec and can be changed and
2878 * removed at will.
2879 * New public fields should be added right above.
2880 *****************************************************************
2881 */
2882 int priv_data_size;
2883 struct AVCodec *next;
2884 /**
2885 * @name Frame-level threading support functions
2886 * @{
2887 */
2888 /**
2889 * If defined, called on thread contexts when they are created.
2890 * If the codec allocates writable tables in init(), re-allocate them here.
2891 * priv_data will be set to a copy of the original.
2892 */
2893 int (*init_thread_copy)(AVCodecContext *);
2894 /**
2895 * Copy necessary context variables from a previous thread context to the current one.
2896 * If not defined, the next thread will start automatically; otherwise, the codec
2897 * must call ff_thread_finish_setup().
2898 *
2899 * dst and src will (rarely) point to the same context, in which case memcpy should be skipped.
2900 */
2901 int (*update_thread_context)(AVCodecContext *dst, const AVCodecContext *src);
2902 /** @} */
2903
2904 /**
2905 * Private codec-specific defaults.
2906 */
2907 const AVCodecDefault *defaults;
2908
2909 /**
2910 * Initialize codec static data, called from avcodec_register().
2911 */
2912 void (*init_static_data)(struct AVCodec *codec);
2913
2914 int (*init)(AVCodecContext *);
2915 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2916 /**
2917 * Encode data to an AVPacket.
2918 *
2919 * @param avctx codec context
2920 * @param avpkt output AVPacket (may contain a user-provided buffer)
2921 * @param[in] frame AVFrame containing the raw data to be encoded
2922 * @param[out] got_packet_ptr encoder sets to 0 or 1 to indicate that a
2923 * non-empty packet was returned in avpkt.
2924 * @return 0 on success, negative error code on failure
2925 */
2926 int (*encode2)(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame,
2927 int *got_packet_ptr);
2928 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt);
2929 int (*close)(AVCodecContext *);
2930 /**
2931 * Flush buffers.
2932 * Will be called when seeking
2933 */
2934 void (*flush)(AVCodecContext *);
2935 } AVCodec;
2936
2937 /**
2938 * AVHWAccel.
2939 */
2940 typedef struct AVHWAccel {
2941 /**
2942 * Name of the hardware accelerated codec.
2943 * The name is globally unique among encoders and among decoders (but an
2944 * encoder and a decoder can share the same name).
2945 */
2946 const char *name;
2947
2948 /**
2949 * Type of codec implemented by the hardware accelerator.
2950 *
2951 * See AVMEDIA_TYPE_xxx
2952 */
2953 enum AVMediaType type;
2954
2955 /**
2956 * Codec implemented by the hardware accelerator.
2957 *
2958 * See CODEC_ID_xxx
2959 */
2960 enum CodecID id;
2961
2962 /**
2963 * Supported pixel format.
2964 *
2965 * Only hardware accelerated formats are supported here.
2966 */
2967 enum PixelFormat pix_fmt;
2968
2969 /**
2970 * Hardware accelerated codec capabilities.
2971 * see FF_HWACCEL_CODEC_CAP_*
2972 */
2973 int capabilities;
2974
2975 struct AVHWAccel *next;
2976
2977 /**
2978 * Called at the beginning of each frame or field picture.
2979 *
2980 * Meaningful frame information (codec specific) is guaranteed to
2981 * be parsed at this point. This function is mandatory.
2982 *
2983 * Note that buf can be NULL along with buf_size set to 0.
2984 * Otherwise, this means the whole frame is available at this point.
2985 *
2986 * @param avctx the codec context
2987 * @param buf the frame data buffer base
2988 * @param buf_size the size of the frame in bytes
2989 * @return zero if successful, a negative value otherwise
2990 */
2991 int (*start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
2992
2993 /**
2994 * Callback for each slice.
2995 *
2996 * Meaningful slice information (codec specific) is guaranteed to
2997 * be parsed at this point. This function is mandatory.
2998 *
2999 * @param avctx the codec context
3000 * @param buf the slice data buffer base
3001 * @param buf_size the size of the slice in bytes
3002 * @return zero if successful, a negative value otherwise
3003 */
3004 int (*decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
3005
3006 /**
3007 * Called at the end of each frame or field picture.
3008 *
3009 * The whole picture is parsed at this point and can now be sent
3010 * to the hardware accelerator. This function is mandatory.
3011 *
3012 * @param avctx the codec context
3013 * @return zero if successful, a negative value otherwise
3014 */
3015 int (*end_frame)(AVCodecContext *avctx);
3016
3017 /**
3018 * Size of HW accelerator private data.
3019 *
3020 * Private data is allocated with av_mallocz() before
3021 * AVCodecContext.get_buffer() and deallocated after
3022 * AVCodecContext.release_buffer().
3023 */
3024 int priv_data_size;
3025 } AVHWAccel;
3026
3027 /**
3028 * @defgroup lavc_picture AVPicture
3029 *
3030 * Functions for working with AVPicture
3031 * @{
3032 */
3033
3034 /**
3035 * four components are given, that's all.
3036 * the last component is alpha
3037 */
3038 typedef struct AVPicture {
3039 uint8_t *data[AV_NUM_DATA_POINTERS];
3040 int linesize[AV_NUM_DATA_POINTERS]; ///< number of bytes per line
3041 } AVPicture;
3042
3043 /**
3044 * @}
3045 */
3046
3047 #define AVPALETTE_SIZE 1024
3048 #define AVPALETTE_COUNT 256
3049
3050 enum AVSubtitleType {
3051 SUBTITLE_NONE,
3052
3053 SUBTITLE_BITMAP, ///< A bitmap, pict will be set
3054
3055 /**
3056 * Plain text, the text field must be set by the decoder and is
3057 * authoritative. ass and pict fields may contain approximations.
3058 */
3059 SUBTITLE_TEXT,
3060
3061 /**
3062 * Formatted text, the ass field must be set by the decoder and is
3063 * authoritative. pict and text fields may contain approximations.
3064 */
3065 SUBTITLE_ASS,
3066 };
3067
3068 typedef struct AVSubtitleRect {
3069 int x; ///< top left corner of pict, undefined when pict is not set
3070 int y; ///< top left corner of pict, undefined when pict is not set
3071 int w; ///< width of pict, undefined when pict is not set
3072 int h; ///< height of pict, undefined when pict is not set
3073 int nb_colors; ///< number of colors in pict, undefined when pict is not set
3074
3075 /**
3076 * data+linesize for the bitmap of this subtitle.
3077 * can be set for text/ass as well once they where rendered
3078 */
3079 AVPicture pict;
3080 enum AVSubtitleType type;
3081
3082 char *text; ///< 0 terminated plain UTF-8 text
3083
3084 /**
3085 * 0 terminated ASS/SSA compatible event line.
3086 * The pressentation of this is unaffected by the other values in this
3087 * struct.
3088 */
3089 char *ass;
3090 } AVSubtitleRect;
3091
3092 typedef struct AVSubtitle {
3093 uint16_t format; /* 0 = graphics */
3094 uint32_t start_display_time; /* relative to packet pts, in ms */
3095 uint32_t end_display_time; /* relative to packet pts, in ms */
3096 unsigned num_rects;
3097 AVSubtitleRect **rects;
3098 int64_t pts; ///< Same as packet pts, in AV_TIME_BASE
3099 } AVSubtitle;
3100
3101 /**
3102 * If c is NULL, returns the first registered codec,
3103 * if c is non-NULL, returns the next registered codec after c,
3104 * or NULL if c is the last one.
3105 */
3106 AVCodec *av_codec_next(AVCodec *c);
3107
3108 /**
3109 * Return the LIBAVCODEC_VERSION_INT constant.
3110 */
3111 unsigned avcodec_version(void);
3112
3113 /**
3114 * Return the libavcodec build-time configuration.
3115 */
3116 const char *avcodec_configuration(void);
3117
3118 /**
3119 * Return the libavcodec license.
3120 */
3121 const char *avcodec_license(void);
3122
3123 /**
3124 * Register the codec codec and initialize libavcodec.
3125 *
3126 * @warning either this function or avcodec_register_all() must be called
3127 * before any other libavcodec functions.
3128 *
3129 * @see avcodec_register_all()
3130 */
3131 void avcodec_register(AVCodec *codec);
3132
3133 /**
3134 * Register all the codecs, parsers and bitstream filters which were enabled at
3135 * configuration time. If you do not call this function you can select exactly
3136 * which formats you want to support, by using the individual registration
3137 * functions.
3138 *
3139 * @see avcodec_register
3140 * @see av_register_codec_parser
3141 * @see av_register_bitstream_filter
3142 */
3143 void avcodec_register_all(void);
3144
3145 /**
3146 * Allocate an AVCodecContext and set its fields to default values. The
3147 * resulting struct can be deallocated by calling avcodec_close() on it followed
3148 * by av_free().
3149 *
3150 * @param codec if non-NULL, allocate private data and initialize defaults
3151 * for the given codec. It is illegal to then call avcodec_open2()
3152 * with a different codec.
3153 * If NULL, then the codec-specific defaults won't be initialized,
3154 * which may result in suboptimal default settings (this is
3155 * important mainly for encoders, e.g. libx264).
3156 *
3157 * @return An AVCodecContext filled with default values or NULL on failure.
3158 * @see avcodec_get_context_defaults
3159 */
3160 AVCodecContext *avcodec_alloc_context3(AVCodec *codec);
3161
3162 /**
3163 * Set the fields of the given AVCodecContext to default values corresponding
3164 * to the given codec (defaults may be codec-dependent).
3165 *
3166 * Do not call this function if a non-NULL codec has been passed
3167 * to avcodec_alloc_context3() that allocated this AVCodecContext.
3168 * If codec is non-NULL, it is illegal to call avcodec_open2() with a
3169 * different codec on this AVCodecContext.
3170 */
3171 int avcodec_get_context_defaults3(AVCodecContext *s, AVCodec *codec);
3172
3173 /**
3174 * Get the AVClass for AVCodecContext. It can be used in combination with
3175 * AV_OPT_SEARCH_FAKE_OBJ for examining options.
3176 *
3177 * @see av_opt_find().
3178 */
3179 const AVClass *avcodec_get_class(void);
3180
3181 /**
3182 * Copy the settings of the source AVCodecContext into the destination
3183 * AVCodecContext. The resulting destination codec context will be
3184 * unopened, i.e. you are required to call avcodec_open2() before you
3185 * can use this AVCodecContext to decode/encode video/audio data.
3186 *
3187 * @param dest target codec context, should be initialized with
3188 * avcodec_alloc_context3(), but otherwise uninitialized
3189 * @param src source codec context
3190 * @return AVERROR() on error (e.g. memory allocation error), 0 on success
3191 */
3192 int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src);
3193
3194 /**
3195 * Allocate an AVFrame and set its fields to default values. The resulting
3196 * struct can be deallocated by simply calling av_free().
3197 *
3198 * @return An AVFrame filled with default values or NULL on failure.
3199 * @see avcodec_get_frame_defaults
3200 */
3201 AVFrame *avcodec_alloc_frame(void);
3202
3203 /**
3204 * Set the fields of the given AVFrame to default values.
3205 *
3206 * @param pic The AVFrame of which the fields should be set to default values.
3207 */
3208 void avcodec_get_frame_defaults(AVFrame *pic);
3209
3210 /**
3211 * Initialize the AVCodecContext to use the given AVCodec. Prior to using this
3212 * function the context has to be allocated with avcodec_alloc_context3().
3213 *
3214 * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
3215 * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
3216 * retrieving a codec.
3217 *
3218 * @warning This function is not thread safe!
3219 *
3220 * @code
3221 * avcodec_register_all();
3222 * av_dict_set(&opts, "b", "2.5M", 0);
3223 * codec = avcodec_find_decoder(CODEC_ID_H264);
3224 * if (!codec)
3225 * exit(1);
3226 *
3227 * context = avcodec_alloc_context3(codec);
3228 *
3229 * if (avcodec_open2(context, codec, opts) < 0)
3230 * exit(1);
3231 * @endcode
3232 *
3233 * @param avctx The context to initialize.
3234 * @param codec The codec to open this context for. If a non-NULL codec has been
3235 * previously passed to avcodec_alloc_context3() or
3236 * avcodec_get_context_defaults3() for this context, then this
3237 * parameter MUST be either NULL or equal to the previously passed
3238 * codec.
3239 * @param options A dictionary filled with AVCodecContext and codec-private options.
3240 * On return this object will be filled with options that were not found.
3241 *
3242 * @return zero on success, a negative value on error
3243 * @see avcodec_alloc_context3(), avcodec_find_decoder(), avcodec_find_encoder(),
3244 * av_dict_set(), av_opt_find().
3245 */
3246 int avcodec_open2(AVCodecContext *avctx, AVCodec *codec, AVDictionary **options);
3247
3248 /**
3249 * Close a given AVCodecContext and free all the data associated with it
3250 * (but not the AVCodecContext itself).
3251 *
3252 * Calling this function on an AVCodecContext that hasn't been opened will free
3253 * the codec-specific data allocated in avcodec_alloc_context3() /
3254 * avcodec_get_context_defaults3() with a non-NULL codec. Subsequent calls will
3255 * do nothing.
3256 */
3257 int avcodec_close(AVCodecContext *avctx);
3258
3259 /**
3260 * Free all allocated data in the given subtitle struct.
3261 *
3262 * @param sub AVSubtitle to free.
3263 */
3264 void avsubtitle_free(AVSubtitle *sub);
3265
3266 /**
3267 * @}
3268 */
3269
3270 /**
3271 * @addtogroup lavc_packet
3272 * @{
3273 */
3274
3275 /**
3276 * @deprecated use NULL instead
3277 */
3278 attribute_deprecated void av_destruct_packet_nofree(AVPacket *pkt);
3279
3280 /**
3281 * Default packet destructor.
3282 */
3283 void av_destruct_packet(AVPacket *pkt);
3284
3285 /**
3286 * Initialize optional fields of a packet with default values.
3287 *
3288 * Note, this does not touch the data and size members, which have to be
3289 * initialized separately.
3290 *
3291 * @param pkt packet
3292 */
3293 void av_init_packet(AVPacket *pkt);
3294
3295 /**
3296 * Allocate the payload of a packet and initialize its fields with
3297 * default values.
3298 *
3299 * @param pkt packet
3300 * @param size wanted payload size
3301 * @return 0 if OK, AVERROR_xxx otherwise
3302 */
3303 int av_new_packet(AVPacket *pkt, int size);
3304
3305 /**
3306 * Reduce packet size, correctly zeroing padding
3307 *
3308 * @param pkt packet
3309 * @param size new size
3310 */
3311 void av_shrink_packet(AVPacket *pkt, int size);
3312
3313 /**
3314 * Increase packet size, correctly zeroing padding
3315 *
3316 * @param pkt packet
3317 * @param grow_by number of bytes by which to increase the size of the packet
3318 */
3319 int av_grow_packet(AVPacket *pkt, int grow_by);
3320
3321 /**
3322 * @warning This is a hack - the packet memory allocation stuff is broken. The
3323 * packet is allocated if it was not really allocated.
3324 */
3325 int av_dup_packet(AVPacket *pkt);
3326
3327 /**
3328 * Free a packet.
3329 *
3330 * @param pkt packet to free
3331 */
3332 void av_free_packet(AVPacket *pkt);
3333
3334 /**
3335 * Allocate new information of a packet.
3336 *
3337 * @param pkt packet
3338 * @param type side information type
3339 * @param size side information size
3340 * @return pointer to fresh allocated data or NULL otherwise
3341 */
3342 uint8_t* av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
3343 int size);
3344
3345 /**
3346 * Shrink the already allocated side data buffer
3347 *
3348 * @param pkt packet
3349 * @param type side information type
3350 * @param size new side information size
3351 * @return 0 on success, < 0 on failure
3352 */
3353 int av_packet_shrink_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
3354 int size);
3355
3356 /**
3357 * Get side information from packet.
3358 *
3359 * @param pkt packet
3360 * @param type desired side information type
3361 * @param size pointer for side information size to store (optional)
3362 * @return pointer to data if present or NULL otherwise
3363 */
3364 uint8_t* av_packet_get_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
3365 int *size);
3366
3367 /**
3368 * @}
3369 */
3370
3371 /**
3372 * @addtogroup lavc_decoding
3373 * @{
3374 */
3375
3376 /**
3377 * Find a registered decoder with a matching codec ID.
3378 *
3379 * @param id CodecID of the requested decoder
3380 * @return A decoder if one was found, NULL otherwise.
3381 */
3382 AVCodec *avcodec_find_decoder(enum CodecID id);
3383
3384 /**
3385 * Find a registered decoder with the specified name.
3386 *
3387 * @param name name of the requested decoder
3388 * @return A decoder if one was found, NULL otherwise.
3389 */
3390 AVCodec *avcodec_find_decoder_by_name(const char *name);
3391
3392 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
3393 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
3394 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
3395
3396 /**
3397 * Return the amount of padding in pixels which the get_buffer callback must
3398 * provide around the edge of the image for codecs which do not have the
3399 * CODEC_FLAG_EMU_EDGE flag.
3400 *
3401 * @return Required padding in pixels.
3402 */
3403 unsigned avcodec_get_edge_width(void);
3404
3405 /**
3406 * Modify width and height values so that they will result in a memory
3407 * buffer that is acceptable for the codec if you do not use any horizontal
3408 * padding.
3409 *
3410 * May only be used if a codec with CODEC_CAP_DR1 has been opened.
3411 * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
3412 * according to avcodec_get_edge_width() before.
3413 */
3414 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
3415
3416 /**
3417 * Modify width and height values so that they will result in a memory
3418 * buffer that is acceptable for the codec if you also ensure that all
3419 * line sizes are a multiple of the respective linesize_align[i].
3420 *
3421 * May only be used if a codec with CODEC_CAP_DR1 has been opened.
3422 * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
3423 * according to avcodec_get_edge_width() before.
3424 */
3425 void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
3426 int linesize_align[AV_NUM_DATA_POINTERS]);
3427
3428 #if FF_API_OLD_DECODE_AUDIO
3429 /**
3430 * Wrapper function which calls avcodec_decode_audio4.
3431 *
3432 * @deprecated Use avcodec_decode_audio4 instead.
3433 *
3434 * Decode the audio frame of size avpkt->size from avpkt->data into samples.
3435 * Some decoders may support multiple frames in a single AVPacket, such
3436 * decoders would then just decode the first frame. In this case,
3437 * avcodec_decode_audio3 has to be called again with an AVPacket that contains
3438 * the remaining data in order to decode the second frame etc.
3439 * If no frame
3440 * could be outputted, frame_size_ptr is zero. Otherwise, it is the
3441 * decompressed frame size in bytes.
3442 *
3443 * @warning You must set frame_size_ptr to the allocated size of the
3444 * output buffer before calling avcodec_decode_audio3().
3445 *
3446 * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
3447 * the actual read bytes because some optimized bitstream readers read 32 or 64
3448 * bits at once and could read over the end.
3449 *
3450 * @warning The end of the input buffer avpkt->data should be set to 0 to ensure that
3451 * no overreading happens for damaged MPEG streams.
3452 *
3453 * @warning You must not provide a custom get_buffer() when using
3454 * avcodec_decode_audio3(). Doing so will override it with
3455 * avcodec_default_get_buffer. Use avcodec_decode_audio4() instead,
3456 * which does allow the application to provide a custom get_buffer().
3457 *
3458 * @note You might have to align the input buffer avpkt->data and output buffer
3459 * samples. The alignment requirements depend on the CPU: On some CPUs it isn't
3460 * necessary at all, on others it won't work at all if not aligned and on others
3461 * it will work but it will have an impact on performance.
3462 *
3463 * In practice, avpkt->data should have 4 byte alignment at minimum and
3464 * samples should be 16 byte aligned unless the CPU doesn't need it
3465 * (AltiVec and SSE do).
3466 *
3467 * @note Codecs which have the CODEC_CAP_DELAY capability set have a delay
3468 * between input and output, these need to be fed with avpkt->data=NULL,
3469 * avpkt->size=0 at the end to return the remaining frames.
3470 *
3471 * @param avctx the codec context
3472 * @param[out] samples the output buffer, sample type in avctx->sample_fmt
3473 * If the sample format is planar, each channel plane will
3474 * be the same size, with no padding between channels.
3475 * @param[in,out] frame_size_ptr the output buffer size in bytes
3476 * @param[in] avpkt The input AVPacket containing the input buffer.
3477 * You can create such packet with av_init_packet() and by then setting
3478 * data and size, some decoders might in addition need other fields.
3479 * All decoders are designed to use the least fields possible though.
3480 * @return On error a negative value is returned, otherwise the number of bytes
3481 * used or zero if no frame data was decompressed (used) from the input AVPacket.
3482 */
3483 attribute_deprecated int avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
3484 int *frame_size_ptr,
3485 AVPacket *avpkt);
3486 #endif
3487
3488 /**
3489 * Decode the audio frame of size avpkt->size from avpkt->data into frame.
3490 *
3491 * Some decoders may support multiple frames in a single AVPacket. Such
3492 * decoders would then just decode the first frame. In this case,
3493 * avcodec_decode_audio4 has to be called again with an AVPacket containing
3494 * the remaining data in order to decode the second frame, etc...
3495 * Even if no frames are returned, the packet needs to be fed to the decoder
3496 * with remaining data until it is completely consumed or an error occurs.
3497 *
3498 * @warning The input buffer, avpkt->data must be FF_INPUT_BUFFER_PADDING_SIZE
3499 * larger than the actual read bytes because some optimized bitstream
3500 * readers read 32 or 64 bits at once and could read over the end.
3501 *
3502 * @note You might have to align the input buffer. The alignment requirements
3503 * depend on the CPU and the decoder.
3504 *
3505 * @param avctx the codec context
3506 * @param[out] frame The AVFrame in which to store decoded audio samples.
3507 * Decoders request a buffer of a particular size by setting
3508 * AVFrame.nb_samples prior to calling get_buffer(). The
3509 * decoder may, however, only utilize part of the buffer by
3510 * setting AVFrame.nb_samples to a smaller value in the
3511 * output frame.
3512 * @param[out] got_frame_ptr Zero if no frame could be decoded, otherwise it is
3513 * non-zero.
3514 * @param[in] avpkt The input AVPacket containing the input buffer.
3515 * At least avpkt->data and avpkt->size should be set. Some
3516 * decoders might also require additional fields to be set.
3517 * @return A negative error code is returned if an error occurred during
3518 * decoding, otherwise the number of bytes consumed from the input
3519 * AVPacket is returned.
3520 */
3521 int avcodec_decode_audio4(AVCodecContext *avctx, AVFrame *frame,
3522 int *got_frame_ptr, AVPacket *avpkt);
3523
3524 /**
3525 * Decode the video frame of size avpkt->size from avpkt->data into picture.
3526 * Some decoders may support multiple frames in a single AVPacket, such
3527 * decoders would then just decode the first frame.
3528 *
3529 * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
3530 * the actual read bytes because some optimized bitstream readers read 32 or 64
3531 * bits at once and could read over the end.
3532 *
3533 * @warning The end of the input buffer buf should be set to 0 to ensure that
3534 * no overreading happens for damaged MPEG streams.
3535 *
3536 * @note You might have to align the input buffer avpkt->data.
3537 * The alignment requirements depend on the CPU: on some CPUs it isn't
3538 * necessary at all, on others it won't work at all if not aligned and on others
3539 * it will work but it will have an impact on performance.
3540 *
3541 * In practice, avpkt->data should have 4 byte alignment at minimum.
3542 *
3543 * @note Codecs which have the CODEC_CAP_DELAY capability set have a delay
3544 * between input and output, these need to be fed with avpkt->data=NULL,
3545 * avpkt->size=0 at the end to return the remaining frames.
3546 *
3547 * @param avctx the codec context
3548 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
3549 * Use avcodec_alloc_frame to get an AVFrame, the codec will
3550 * allocate memory for the actual bitmap.
3551 * with default get/release_buffer(), the decoder frees/reuses the bitmap as it sees fit.
3552 * with overridden get/release_buffer() (needs CODEC_CAP_DR1) the user decides into what buffer the decoder
3553 * decodes and the decoder tells the user once it does not need the data anymore,
3554 * the user app can at this point free/reuse/keep the memory as it sees fit.
3555 *
3556 * @param[in] avpkt The input AVpacket containing the input buffer.
3557 * You can create such packet with av_init_packet() and by then setting
3558 * data and size, some decoders might in addition need other fields like
3559 * flags&AV_PKT_FLAG_KEY. All decoders are designed to use the least
3560 * fields possible.
3561 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
3562 * @return On error a negative value is returned, otherwise the number of bytes
3563 * used or zero if no frame could be decompressed.
3564 */
3565 int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
3566 int *got_picture_ptr,
3567 AVPacket *avpkt);
3568
3569 /**
3570 * Decode a subtitle message.
3571 * Return a negative value on error, otherwise return the number of bytes used.
3572 * If no subtitle could be decompressed, got_sub_ptr is zero.
3573 * Otherwise, the subtitle is stored in *sub.
3574 * Note that CODEC_CAP_DR1 is not available for subtitle codecs. This is for
3575 * simplicity, because the performance difference is expect to be negligible
3576 * and reusing a get_buffer written for video codecs would probably perform badly
3577 * due to a potentially very different allocation pattern.
3578 *
3579 * @param avctx the codec context
3580 * @param[out] sub The AVSubtitle in which the decoded subtitle will be stored, must be
3581 freed with avsubtitle_free if *got_sub_ptr is set.
3582 * @param[in,out] got_sub_ptr Zero if no subtitle could be decompressed, otherwise, it is nonzero.
3583 * @param[in] avpkt The input AVPacket containing the input buffer.
3584 */
3585 int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
3586 int *got_sub_ptr,
3587 AVPacket *avpkt);
3588
3589 /**
3590 * @defgroup lavc_parsing Frame parsing
3591 * @{
3592 */
3593
3594 typedef struct AVCodecParserContext {
3595 void *priv_data;
3596 struct AVCodecParser *parser;
3597 int64_t frame_offset; /* offset of the current frame */
3598 int64_t cur_offset; /* current offset
3599 (incremented by each av_parser_parse()) */
3600 int64_t next_frame_offset; /* offset of the next frame */
3601 /* video info */
3602 int pict_type; /* XXX: Put it back in AVCodecContext. */
3603 /**
3604 * This field is used for proper frame duration computation in lavf.
3605 * It signals, how much longer the frame duration of the current frame
3606 * is compared to normal frame duration.
3607 *
3608 * frame_duration = (1 + repeat_pict) * time_base
3609 *
3610 * It is used by codecs like H.264 to display telecined material.
3611 */
3612 int repeat_pict; /* XXX: Put it back in AVCodecContext. */
3613 int64_t pts; /* pts of the current frame */
3614 int64_t dts; /* dts of the current frame */
3615
3616 /* private data */
3617 int64_t last_pts;
3618 int64_t last_dts;
3619 int fetch_timestamp;
3620
3621 #define AV_PARSER_PTS_NB 4
3622 int cur_frame_start_index;
3623 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
3624 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
3625 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
3626
3627 int flags;
3628 #define PARSER_FLAG_COMPLETE_FRAMES 0x0001
3629 #define PARSER_FLAG_ONCE 0x0002
3630 /// Set if the parser has a valid file offset
3631 #define PARSER_FLAG_FETCHED_OFFSET 0x0004
3632
3633 int64_t offset; ///< byte offset from starting packet start
3634 int64_t cur_frame_end[AV_PARSER_PTS_NB];
3635
3636 /**
3637 * Set by parser to 1 for key frames and 0 for non-key frames.
3638 * It is initialized to -1, so if the parser doesn't set this flag,
3639 * old-style fallback using AV_PICTURE_TYPE_I picture type as key frames
3640 * will be used.
3641 */
3642 int key_frame;
3643
3644 /**
3645 * Time difference in stream time base units from the pts of this
3646 * packet to the point at which the output from the decoder has converged
3647 * independent from the availability of previous frames. That is, the
3648 * frames are virtually identical no matter if decoding started from
3649 * the very first frame or from this keyframe.
3650 * Is AV_NOPTS_VALUE if unknown.
3651 * This field is not the display duration of the current frame.
3652 * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
3653 * set.
3654 *
3655 * The purpose of this field is to allow seeking in streams that have no
3656 * keyframes in the conventional sense. It corresponds to the
3657 * recovery point SEI in H.264 and match_time_delta in NUT. It is also
3658 * essential for some types of subtitle streams to ensure that all
3659 * subtitles are correctly displayed after seeking.
3660 */
3661 int64_t convergence_duration;
3662
3663 // Timestamp generation support:
3664 /**
3665 * Synchronization point for start of timestamp generation.
3666 *
3667 * Set to >0 for sync point, 0 for no sync point and <0 for undefined
3668 * (default).
3669 *
3670 * For example, this corresponds to presence of H.264 buffering period
3671 * SEI message.
3672 */
3673 int dts_sync_point;
3674
3675 /**
3676 * Offset of the current timestamp against last timestamp sync point in
3677 * units of AVCodecContext.time_base.
3678 *
3679 * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
3680 * contain a valid timestamp offset.
3681 *
3682 * Note that the timestamp of sync point has usually a nonzero
3683 * dts_ref_dts_delta, which refers to the previous sync point. Offset of
3684 * the next frame after timestamp sync point will be usually 1.
3685 *
3686 * For example, this corresponds to H.264 cpb_removal_delay.
3687 */
3688 int dts_ref_dts_delta;
3689
3690 /**
3691 * Presentation delay of current frame in units of AVCodecContext.time_base.
3692 *
3693 * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
3694 * contain valid non-negative timestamp delta (presentation time of a frame
3695 * must not lie in the past).
3696 *
3697 * This delay represents the difference between decoding and presentation
3698 * time of the frame.
3699 *
3700 * For example, this corresponds to H.264 dpb_output_delay.
3701 */
3702 int pts_dts_delta;
3703
3704 /**
3705 * Position of the packet in file.
3706 *
3707 * Analogous to cur_frame_pts/dts
3708 */
3709 int64_t cur_frame_pos[AV_PARSER_PTS_NB];
3710
3711 /**
3712 * Byte position of currently parsed frame in stream.
3713 */
3714 int64_t pos;
3715
3716 /**
3717 * Previous frame byte position.
3718 */
3719 int64_t last_pos;
3720
3721 /**
3722 * Duration of the current frame.
3723 * For audio, this is in units of 1 / AVCodecContext.sample_rate.
3724 * For all other types, this is in units of AVCodecContext.time_base.
3725 */
3726 int duration;
3727 } AVCodecParserContext;
3728
3729 typedef struct AVCodecParser {
3730 int codec_ids[5]; /* several codec IDs are permitted */
3731 int priv_data_size;
3732 int (*parser_init)(AVCodecParserContext *s);
3733 int (*parser_parse)(AVCodecParserContext *s,
3734 AVCodecContext *avctx,
3735 const uint8_t **poutbuf, int *poutbuf_size,
3736 const uint8_t *buf, int buf_size);
3737 void (*parser_close)(AVCodecParserContext *s);
3738 int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
3739 struct AVCodecParser *next;
3740 } AVCodecParser;
3741
3742 AVCodecParser *av_parser_next(AVCodecParser *c);
3743
3744 void av_register_codec_parser(AVCodecParser *parser);
3745 AVCodecParserContext *av_parser_init(int codec_id);
3746
3747 /**
3748 * Parse a packet.
3749 *
3750 * @param s parser context.
3751 * @param avctx codec context.
3752 * @param poutbuf set to pointer to parsed buffer or NULL if not yet finished.
3753 * @param poutbuf_size set to size of parsed buffer or zero if not yet finished.
3754 * @param buf input buffer.
3755 * @param buf_size input length, to signal EOF, this should be 0 (so that the last frame can be output).
3756 * @param pts input presentation timestamp.
3757 * @param dts input decoding timestamp.
3758 * @param pos input byte position in stream.
3759 * @return the number of bytes of the input bitstream used.
3760 *
3761 * Example:
3762 * @code
3763 * while(in_len){
3764 * len = av_parser_parse2(myparser, AVCodecContext, &data, &size,
3765 * in_data, in_len,
3766 * pts, dts, pos);
3767 * in_data += len;
3768 * in_len -= len;
3769 *
3770 * if(size)
3771 * decode_frame(data, size);
3772 * }
3773 * @endcode
3774 */
3775 int av_parser_parse2(AVCodecParserContext *s,
3776 AVCodecContext *avctx,
3777 uint8_t **poutbuf, int *poutbuf_size,
3778 const uint8_t *buf, int buf_size,
3779 int64_t pts, int64_t dts,
3780 int64_t pos);
3781
3782 int av_parser_change(AVCodecParserContext *s,
3783 AVCodecContext *avctx,
3784 uint8_t **poutbuf, int *poutbuf_size,
3785 const uint8_t *buf, int buf_size, int keyframe);
3786 void av_parser_close(AVCodecParserContext *s);
3787
3788 /**
3789 * @}
3790 * @}
3791 */
3792
3793 /**
3794 * @addtogroup lavc_encoding
3795 * @{
3796 */
3797
3798 /**
3799 * Find a registered encoder with a matching codec ID.
3800 *
3801 * @param id CodecID of the requested encoder
3802 * @return An encoder if one was found, NULL otherwise.
3803 */
3804 AVCodec *avcodec_find_encoder(enum CodecID id);
3805
3806 /**
3807 * Find a registered encoder with the specified name.
3808 *
3809 * @param name name of the requested encoder
3810 * @return An encoder if one was found, NULL otherwise.
3811 */
3812 AVCodec *avcodec_find_encoder_by_name(const char *name);
3813
3814 #if FF_API_OLD_ENCODE_AUDIO
3815 /**
3816 * Encode an audio frame from samples into buf.
3817 *
3818 * @deprecated Use avcodec_encode_audio2 instead.
3819 *
3820 * @note The output buffer should be at least FF_MIN_BUFFER_SIZE bytes large.
3821 * However, for codecs with avctx->frame_size equal to 0 (e.g. PCM) the user
3822 * will know how much space is needed because it depends on the value passed
3823 * in buf_size as described below. In that case a lower value can be used.
3824 *
3825 * @param avctx the codec context
3826 * @param[out] buf the output buffer
3827 * @param[in] buf_size the output buffer size
3828 * @param[in] samples the input buffer containing the samples
3829 * The number of samples read from this buffer is frame_size*channels,
3830 * both of which are defined in avctx.
3831 * For codecs which have avctx->frame_size equal to 0 (e.g. PCM) the number of
3832 * samples read from samples is equal to:
3833 * buf_size * 8 / (avctx->channels * av_get_bits_per_sample(avctx->codec_id))
3834 * This also implies that av_get_bits_per_sample() must not return 0 for these
3835 * codecs.
3836 * @return On error a negative value is returned, on success zero or the number
3837 * of bytes used to encode the data read from the input buffer.
3838 */
3839 int attribute_deprecated avcodec_encode_audio(AVCodecContext *avctx,
3840 uint8_t *buf, int buf_size,
3841 const short *samples);
3842 #endif
3843
3844 /**
3845 * Encode a frame of audio.
3846 *
3847 * Takes input samples from frame and writes the next output packet, if
3848 * available, to avpkt. The output packet does not necessarily contain data for
3849 * the most recent frame, as encoders can delay, split, and combine input frames
3850 * internally as needed.
3851 *
3852 * @param avctx codec context
3853 * @param avpkt output AVPacket.
3854 * The user can supply an output buffer by setting
3855 * avpkt->data and avpkt->size prior to calling the
3856 * function, but if the size of the user-provided data is not
3857 * large enough, encoding will fail. All other AVPacket fields
3858 * will be reset by the encoder using av_init_packet(). If
3859 * avpkt->data is NULL, the encoder will allocate it.
3860 * The encoder will set avpkt->size to the size of the
3861 * output packet.
3862 *
3863 * If this function fails or produces no output, avpkt will be
3864 * freed using av_free_packet() (i.e. avpkt->destruct will be
3865 * called to free the user supplied buffer).
3866 * @param[in] frame AVFrame containing the raw audio data to be encoded.
3867 * May be NULL when flushing an encoder that has the
3868 * CODEC_CAP_DELAY capability set.
3869 * If CODEC_CAP_VARIABLE_FRAME_SIZE is set, then each frame
3870 * can have any number of samples.
3871 * If it is not set, frame->nb_samples must be equal to
3872 * avctx->frame_size for all frames except the last.
3873 * The final frame may be smaller than avctx->frame_size.
3874 * @param[out] got_packet_ptr This field is set to 1 by libavcodec if the
3875 * output packet is non-empty, and to 0 if it is
3876 * empty. If the function returns an error, the
3877 * packet can be assumed to be invalid, and the
3878 * value of got_packet_ptr is undefined and should
3879 * not be used.
3880 * @return 0 on success, negative error code on failure
3881 */
3882 int avcodec_encode_audio2(AVCodecContext *avctx, AVPacket *avpkt,
3883 const AVFrame *frame, int *got_packet_ptr);
3884
3885 #if FF_API_OLD_ENCODE_VIDEO
3886 /**
3887 * @deprecated use avcodec_encode_video2() instead.
3888 *
3889 * Encode a video frame from pict into buf.
3890 * The input picture should be
3891 * stored using a specific format, namely avctx.pix_fmt.
3892 *
3893 * @param avctx the codec context
3894 * @param[out] buf the output buffer for the bitstream of encoded frame
3895 * @param[in] buf_size the size of the output buffer in bytes
3896 * @param[in] pict the input picture to encode
3897 * @return On error a negative value is returned, on success zero or the number
3898 * of bytes used from the output buffer.
3899 */
3900 attribute_deprecated
3901 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3902 const AVFrame *pict);
3903 #endif
3904
3905 /**
3906 * Encode a frame of video.
3907 *
3908 * Takes input raw video data from frame and writes the next output packet, if
3909 * available, to avpkt. The output packet does not necessarily contain data for
3910 * the most recent frame, as encoders can delay and reorder input frames
3911 * internally as needed.
3912 *
3913 * @param avctx codec context
3914 * @param avpkt output AVPacket.
3915 * The user can supply an output buffer by setting
3916 * avpkt->data and avpkt->size prior to calling the
3917 * function, but if the size of the user-provided data is not
3918 * large enough, encoding will fail. All other AVPacket fields
3919 * will be reset by the encoder using av_init_packet(). If
3920 * avpkt->data is NULL, the encoder will allocate it.
3921 * The encoder will set avpkt->size to the size of the
3922 * output packet. The returned data (if any) belongs to the
3923 * caller, he is responsible for freeing it.
3924 *
3925 * If this function fails or produces no output, avpkt will be
3926 * freed using av_free_packet() (i.e. avpkt->destruct will be
3927 * called to free the user supplied buffer).
3928 * @param[in] frame AVFrame containing the raw video data to be encoded.
3929 * May be NULL when flushing an encoder that has the
3930 * CODEC_CAP_DELAY capability set.
3931 * @param[out] got_packet_ptr This field is set to 1 by libavcodec if the
3932 * output packet is non-empty, and to 0 if it is
3933 * empty. If the function returns an error, the
3934 * packet can be assumed to be invalid, and the
3935 * value of got_packet_ptr is undefined and should
3936 * not be used.
3937 * @return 0 on success, negative error code on failure
3938 */
3939 int avcodec_encode_video2(AVCodecContext *avctx, AVPacket *avpkt,
3940 const AVFrame *frame, int *got_packet_ptr);
3941
3942 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3943 const AVSubtitle *sub);
3944
3945
3946 /**
3947 * @}
3948 */
3949
3950 /**
3951 * @defgroup lavc_resample Audio resampling
3952 * @ingroup libavc
3953 *
3954 * @{
3955 */
3956 struct ReSampleContext;
3957 struct AVResampleContext;
3958
3959 typedef struct ReSampleContext ReSampleContext;
3960
3961 /**
3962 * Initialize audio resampling context.
3963 *
3964 * @param output_channels number of output channels
3965 * @param input_channels number of input channels
3966 * @param output_rate output sample rate
3967 * @param input_rate input sample rate
3968 * @param sample_fmt_out requested output sample format
3969 * @param sample_fmt_in input sample format
3970 * @param filter_length length of each FIR filter in the filterbank relative to the cutoff frequency
3971 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
3972 * @param linear if 1 then the used FIR filter will be linearly interpolated
3973 between the 2 closest, if 0 the closest will be used
3974 * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
3975 * @return allocated ReSampleContext, NULL if error occurred
3976 */
3977 ReSampleContext *av_audio_resample_init(int output_channels, int input_channels,
3978 int output_rate, int input_rate,
3979 enum AVSampleFormat sample_fmt_out,
3980 enum AVSampleFormat sample_fmt_in,
3981 int filter_length, int log2_phase_count,
3982 int linear, double cutoff);
3983
3984 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
3985
3986 /**
3987 * Free resample context.
3988 *
3989 * @param s a non-NULL pointer to a resample context previously
3990 * created with av_audio_resample_init()
3991 */
3992 void audio_resample_close(ReSampleContext *s);
3993
3994
3995 /**
3996 * Initialize an audio resampler.
3997 * Note, if either rate is not an integer then simply scale both rates up so they are.
3998 * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
3999 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
4000 * @param linear If 1 then the used FIR filter will be linearly interpolated
4001 between the 2 closest, if 0 the closest will be used
4002 * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
4003 */
4004 struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
4005
4006 /**
4007 * Resample an array of samples using a previously configured context.
4008 * @param src an array of unconsumed samples
4009 * @param consumed the number of samples of src which have been consumed are returned here
4010 * @param src_size the number of unconsumed samples available
4011 * @param dst_size the amount of space in samples available in dst
4012 * @param update_ctx If this is 0 then the context will not be modified, that way several channels can be resampled with the same context.
4013 * @return the number of samples written in dst or -1 if an error occurred
4014 */
4015 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
4016
4017
4018 /**
4019 * Compensate samplerate/timestamp drift. The compensation is done by changing
4020 * the resampler parameters, so no audible clicks or similar distortions occur
4021 * @param compensation_distance distance in output samples over which the compensation should be performed
4022 * @param sample_delta number of output samples which should be output less
4023 *
4024 * example: av_resample_compensate(c, 10, 500)
4025 * here instead of 510 samples only 500 samples would be output
4026 *
4027 * note, due to rounding the actual compensation might be slightly different,
4028 * especially if the compensation_distance is large and the in_rate used during init is small
4029 */
4030 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
4031 void av_resample_close(struct AVResampleContext *c);
4032
4033 /**
4034 * @}
4035 */
4036
4037 /**
4038 * @addtogroup lavc_picture
4039 * @{
4040 */
4041
4042 /**
4043 * Allocate memory for a picture. Call avpicture_free() to free it.
4044 *
4045 * @see avpicture_fill()
4046 *
4047 * @param picture the picture to be filled in
4048 * @param pix_fmt the format of the picture
4049 * @param width the width of the picture
4050 * @param height the height of the picture
4051 * @return zero if successful, a negative value if not
4052 */
4053 int avpicture_alloc(AVPicture *picture, enum PixelFormat pix_fmt, int width, int height);
4054
4055 /**
4056 * Free a picture previously allocated by avpicture_alloc().
4057 * The data buffer used by the AVPicture is freed, but the AVPicture structure
4058 * itself is not.
4059 *
4060 * @param picture the AVPicture to be freed
4061 */
4062 void avpicture_free(AVPicture *picture);
4063
4064 /**
4065 * Fill in the AVPicture fields.
4066 * The fields of the given AVPicture are filled in by using the 'ptr' address
4067 * which points to the image data buffer. Depending on the specified picture
4068 * format, one or multiple image data pointers and line sizes will be set.
4069 * If a planar format is specified, several pointers will be set pointing to
4070 * the different picture planes and the line sizes of the different planes
4071 * will be stored in the lines_sizes array.
4072 * Call with ptr == NULL to get the required size for the ptr buffer.
4073 *
4074 * To allocate the buffer and fill in the AVPicture fields in one call,
4075 * use avpicture_alloc().
4076 *
4077 * @param picture AVPicture whose fields are to be filled in
4078 * @param ptr Buffer which will contain or contains the actual image data
4079 * @param pix_fmt The format in which the picture data is stored.
4080 * @param width the width of the image in pixels
4081 * @param height the height of the image in pixels
4082 * @return size of the image data in bytes
4083 */
4084 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
4085 enum PixelFormat pix_fmt, int width, int height);
4086
4087 /**
4088 * Copy pixel data from an AVPicture into a buffer.
4089 * The data is stored compactly, without any gaps for alignment or padding
4090 * which may be applied by avpicture_fill().
4091 *
4092 * @see avpicture_get_size()
4093 *
4094 * @param[in] src AVPicture containing image data
4095 * @param[in] pix_fmt The format in which the picture data is stored.
4096 * @param[in] width the width of the image in pixels.
4097 * @param[in] height the height of the image in pixels.
4098 * @param[out] dest A buffer into which picture data will be copied.
4099 * @param[in] dest_size The size of 'dest'.
4100 * @return The number of bytes written to dest, or a negative value (error code) on error.
4101 */
4102 int avpicture_layout(const AVPicture* src, enum PixelFormat pix_fmt, int width, int height,
4103 unsigned char *dest, int dest_size);
4104
4105 /**
4106 * Calculate the size in bytes that a picture of the given width and height
4107 * would occupy if stored in the given picture format.
4108 * Note that this returns the size of a compact representation as generated
4109 * by avpicture_layout(), which can be smaller than the size required for e.g.
4110 * avpicture_fill().
4111 *
4112 * @param pix_fmt the given picture format
4113 * @param width the width of the image
4114 * @param height the height of the image
4115 * @return Image data size in bytes or -1 on error (e.g. too large dimensions).
4116 */
4117 int avpicture_get_size(enum PixelFormat pix_fmt, int width, int height);
4118
4119 /**
4120 * deinterlace - if not supported return -1
4121 */
4122 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
4123 enum PixelFormat pix_fmt, int width, int height);
4124 /**
4125 * Copy image src to dst. Wraps av_picture_data_copy() above.
4126 */
4127 void av_picture_copy(AVPicture *dst, const AVPicture *src,
4128 enum PixelFormat pix_fmt, int width, int height);
4129
4130 /**
4131 * Crop image top and left side.
4132 */
4133 int av_picture_crop(AVPicture *dst, const AVPicture *src,
4134 enum PixelFormat pix_fmt, int top_band, int left_band);
4135
4136 /**
4137 * Pad image.
4138 */
4139 int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, enum PixelFormat pix_fmt,
4140 int padtop, int padbottom, int padleft, int padright, int *color);
4141
4142 /**
4143 * @}
4144 */
4145
4146 /**
4147 * @defgroup lavc_misc Utility functions
4148 * @ingroup libavc
4149 *
4150 * Miscellaneous utility functions related to both encoding and decoding
4151 * (or neither).
4152 * @{
4153 */
4154
4155 /**
4156 * @defgroup lavc_misc_pixfmt Pixel formats
4157 *
4158 * Functions for working with pixel formats.
4159 * @{
4160 */
4161
4162 void avcodec_get_chroma_sub_sample(enum PixelFormat pix_fmt, int *h_shift, int *v_shift);
4163
4164 /**
4165 * Return a value representing the fourCC code associated to the
4166 * pixel format pix_fmt, or 0 if no associated fourCC code can be
4167 * found.
4168 */
4169 unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat pix_fmt);
4170
4171 #define FF_LOSS_RESOLUTION 0x0001 /**< loss due to resolution change */
4172 #define FF_LOSS_DEPTH 0x0002 /**< loss due to color depth change */
4173 #define FF_LOSS_COLORSPACE 0x0004 /**< loss due to color space conversion */
4174 #define FF_LOSS_ALPHA 0x0008 /**< loss of alpha bits */
4175 #define FF_LOSS_COLORQUANT 0x0010 /**< loss due to color quantization */
4176 #define FF_LOSS_CHROMA 0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
4177
4178 /**
4179 * Compute what kind of losses will occur when converting from one specific
4180 * pixel format to another.
4181 * When converting from one pixel format to another, information loss may occur.
4182 * For example, when converting from RGB24 to GRAY, the color information will
4183 * be lost. Similarly, other losses occur when converting from some formats to
4184 * other formats. These losses can involve loss of chroma, but also loss of
4185 * resolution, loss of color depth, loss due to the color space conversion, loss
4186 * of the alpha bits or loss due to color quantization.
4187 * avcodec_get_fix_fmt_loss() informs you about the various types of losses
4188 * which will occur when converting from one pixel format to another.
4189 *
4190 * @param[in] dst_pix_fmt destination pixel format
4191 * @param[in] src_pix_fmt source pixel format
4192 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
4193 * @return Combination of flags informing you what kind of losses will occur.
4194 */
4195 int avcodec_get_pix_fmt_loss(enum PixelFormat dst_pix_fmt, enum PixelFormat src_pix_fmt,
4196 int has_alpha);
4197
4198 /**
4199 * Find the best pixel format to convert to given a certain source pixel
4200 * format. When converting from one pixel format to another, information loss
4201 * may occur. For example, when converting from RGB24 to GRAY, the color
4202 * information will be lost. Similarly, other losses occur when converting from
4203 * some formats to other formats. avcodec_find_best_pix_fmt() searches which of
4204 * the given pixel formats should be used to suffer the least amount of loss.
4205 * The pixel formats from which it chooses one, are determined by the
4206 * pix_fmt_mask parameter.
4207 *
4208 * @code
4209 * src_pix_fmt = PIX_FMT_YUV420P;
4210 * pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << PIX_FMT_RGB24);
4211 * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
4212 * @endcode
4213 *
4214 * @param[in] pix_fmt_mask bitmask determining which pixel format to choose from
4215 * @param[in] src_pix_fmt source pixel format
4216 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
4217 * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
4218 * @return The best pixel format to convert to or -1 if none was found.
4219 */
4220 enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt,
4221 int has_alpha, int *loss_ptr);
4222
4223 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
4224
4225 /**
4226 * @}
4227 */
4228
4229 void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
4230
4231 /**
4232 * Put a string representing the codec tag codec_tag in buf.
4233 *
4234 * @param buf_size size in bytes of buf
4235 * @return the length of the string that would have been generated if
4236 * enough space had been available, excluding the trailing null
4237 */
4238 size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag);
4239
4240 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
4241
4242 /**
4243 * Return a name for the specified profile, if available.
4244 *
4245 * @param codec the codec that is searched for the given profile
4246 * @param profile the profile value for which a name is requested
4247 * @return A name for the profile if found, NULL otherwise.
4248 */
4249 const char *av_get_profile_name(const AVCodec *codec, int profile);
4250
4251 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size);
4252 int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int, int),void *arg, int *ret, int count);
4253 //FIXME func typedef
4254
4255 /**
4256 * Fill audio frame data and linesize.
4257 * AVFrame extended_data channel pointers are allocated if necessary for
4258 * planar audio.
4259 *
4260 * @param frame the AVFrame
4261 * frame->nb_samples must be set prior to calling the
4262 * function. This function fills in frame->data,
4263 * frame->extended_data, frame->linesize[0].
4264 * @param nb_channels channel count
4265 * @param sample_fmt sample format
4266 * @param buf buffer to use for frame data
4267 * @param buf_size size of buffer
4268 * @param align plane size sample alignment (0 = default)
4269 * @return 0 on success, negative error code on failure
4270 */
4271 int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels,
4272 enum AVSampleFormat sample_fmt, const uint8_t *buf,
4273 int buf_size, int align);
4274
4275 /**
4276 * Flush buffers, should be called when seeking or when switching to a different stream.
4277 */
4278 void avcodec_flush_buffers(AVCodecContext *avctx);
4279
4280 void avcodec_default_free_buffers(AVCodecContext *s);
4281
4282 /**
4283 * Return codec bits per sample.
4284 *
4285 * @param[in] codec_id the codec
4286 * @return Number of bits per sample or zero if unknown for the given codec.
4287 */
4288 int av_get_bits_per_sample(enum CodecID codec_id);
4289
4290 /**
4291 * Return codec bits per sample.
4292 * Only return non-zero if the bits per sample is exactly correct, not an
4293 * approximation.
4294 *
4295 * @param[in] codec_id the codec
4296 * @return Number of bits per sample or zero if unknown for the given codec.
4297 */
4298 int av_get_exact_bits_per_sample(enum CodecID codec_id);
4299
4300 /**
4301 * Return audio frame duration.
4302 *
4303 * @param avctx codec context
4304 * @param frame_bytes size of the frame, or 0 if unknown
4305 * @return frame duration, in samples, if known. 0 if not able to
4306 * determine.
4307 */
4308 int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes);
4309
4310
4311 typedef struct AVBitStreamFilterContext {
4312 void *priv_data;
4313 struct AVBitStreamFilter *filter;
4314 AVCodecParserContext *parser;
4315 struct AVBitStreamFilterContext *next;
4316 } AVBitStreamFilterContext;
4317
4318
4319 typedef struct AVBitStreamFilter {
4320 const char *name;
4321 int priv_data_size;
4322 int (*filter)(AVBitStreamFilterContext *bsfc,
4323 AVCodecContext *avctx, const char *args,
4324 uint8_t **poutbuf, int *poutbuf_size,
4325 const uint8_t *buf, int buf_size, int keyframe);
4326 void (*close)(AVBitStreamFilterContext *bsfc);
4327 struct AVBitStreamFilter *next;
4328 } AVBitStreamFilter;
4329
4330 void av_register_bitstream_filter(AVBitStreamFilter *bsf);
4331 AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
4332 int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
4333 AVCodecContext *avctx, const char *args,
4334 uint8_t **poutbuf, int *poutbuf_size,
4335 const uint8_t *buf, int buf_size, int keyframe);
4336 void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
4337
4338 AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f);
4339
4340 /* memory */
4341
4342 /**
4343 * Reallocate the given block if it is not large enough, otherwise do nothing.
4344 *
4345 * @see av_realloc
4346 */
4347 void *av_fast_realloc(void *ptr, unsigned int *size, size_t min_size);
4348
4349 /**
4350 * Allocate a buffer, reusing the given one if large enough.
4351 *
4352 * Contrary to av_fast_realloc the current buffer contents might not be
4353 * preserved and on error the old buffer is freed, thus no special
4354 * handling to avoid memleaks is necessary.
4355 *
4356 * @param ptr pointer to pointer to already allocated buffer, overwritten with pointer to new buffer
4357 * @param size size of the buffer *ptr points to
4358 * @param min_size minimum size of *ptr buffer after returning, *ptr will be NULL and
4359 * *size 0 if an error occurred.
4360 */
4361 void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size);
4362
4363 /**
4364 * Allocate a buffer with padding, reusing the given one if large enough.
4365 *
4366 * Same behaviour av_fast_malloc but the buffer has additional
4367 * FF_INPUT_PADDING_SIZE at the end which will always memset to 0.
4368 *
4369 */
4370 void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size);
4371
4372 /**
4373 * Encode extradata length to a buffer. Used by xiph codecs.
4374 *
4375 * @param s buffer to write to; must be at least (v/255+1) bytes long
4376 * @param v size of extradata in bytes
4377 * @return number of bytes written to the buffer.
4378 */
4379 unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
4380
4381 /**
4382 * Log a generic warning message about a missing feature. This function is
4383 * intended to be used internally by Libav (libavcodec, libavformat, etc.)
4384 * only, and would normally not be used by applications.
4385 * @param[in] avc a pointer to an arbitrary struct of which the first field is
4386 * a pointer to an AVClass struct
4387 * @param[in] feature string containing the name of the missing feature
4388 * @param[in] want_sample indicates if samples are wanted which exhibit this feature.
4389 * If want_sample is non-zero, additional verbage will be added to the log
4390 * message which tells the user how to report samples to the development
4391 * mailing list.
4392 */
4393 void av_log_missing_feature(void *avc, const char *feature, int want_sample);
4394
4395 /**
4396 * Log a generic warning message asking for a sample. This function is
4397 * intended to be used internally by Libav (libavcodec, libavformat, etc.)
4398 * only, and would normally not be used by applications.
4399 * @param[in] avc a pointer to an arbitrary struct of which the first field is
4400 * a pointer to an AVClass struct
4401 * @param[in] msg string containing an optional message, or NULL if no message
4402 */
4403 void av_log_ask_for_sample(void *avc, const char *msg, ...) av_printf_format(2, 3);
4404
4405 /**
4406 * Register the hardware accelerator hwaccel.
4407 */
4408 void av_register_hwaccel(AVHWAccel *hwaccel);
4409
4410 /**
4411 * If hwaccel is NULL, returns the first registered hardware accelerator,
4412 * if hwaccel is non-NULL, returns the next registered hardware accelerator
4413 * after hwaccel, or NULL if hwaccel is the last one.
4414 */
4415 AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel);
4416
4417
4418 /**
4419 * Lock operation used by lockmgr
4420 */
4421 enum AVLockOp {
4422 AV_LOCK_CREATE, ///< Create a mutex
4423 AV_LOCK_OBTAIN, ///< Lock the mutex
4424 AV_LOCK_RELEASE, ///< Unlock the mutex
4425 AV_LOCK_DESTROY, ///< Free mutex resources
4426 };
4427
4428 /**
4429 * Register a user provided lock manager supporting the operations
4430 * specified by AVLockOp. mutex points to a (void *) where the
4431 * lockmgr should store/get a pointer to a user allocated mutex. It's
4432 * NULL upon AV_LOCK_CREATE and != NULL for all other ops.
4433 *
4434 * @param cb User defined callback. Note: Libav may invoke calls to this
4435 * callback during the call to av_lockmgr_register().
4436 * Thus, the application must be prepared to handle that.
4437 * If cb is set to NULL the lockmgr will be unregistered.
4438 * Also note that during unregistration the previously registered
4439 * lockmgr callback may also be invoked.
4440 */
4441 int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op));
4442
4443 /**
4444 * Get the type of the given codec.
4445 */
4446 enum AVMediaType avcodec_get_type(enum CodecID codec_id);
4447
4448 /**
4449 * @return a positive value if s is open (i.e. avcodec_open2() was called on it
4450 * with no corresponding avcodec_close()), 0 otherwise.
4451 */
4452 int avcodec_is_open(AVCodecContext *s);
4453
4454 /**
4455 * @return a non-zero number if codec is an encoder, zero otherwise
4456 */
4457 int av_codec_is_encoder(AVCodec *codec);
4458
4459 /**
4460 * @return a non-zero number if codec is a decoder, zero otherwise
4461 */
4462 int av_codec_is_decoder(AVCodec *codec);
4463
4464 /**
4465 * @}
4466 */
4467
4468 #endif /* AVCODEC_AVCODEC_H */