Add log_level_offset to AVCodecContext.
[libav.git] / libavcodec / avcodec.h
1 /*
2 * copyright (c) 2001 Fabrice Bellard
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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/avutil.h"
31
32 #define LIBAVCODEC_VERSION_MAJOR 52
33 #define LIBAVCODEC_VERSION_MINOR 67
34 #define LIBAVCODEC_VERSION_MICRO 2
35
36 #define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
37 LIBAVCODEC_VERSION_MINOR, \
38 LIBAVCODEC_VERSION_MICRO)
39 #define LIBAVCODEC_VERSION AV_VERSION(LIBAVCODEC_VERSION_MAJOR, \
40 LIBAVCODEC_VERSION_MINOR, \
41 LIBAVCODEC_VERSION_MICRO)
42 #define LIBAVCODEC_BUILD LIBAVCODEC_VERSION_INT
43
44 #define LIBAVCODEC_IDENT "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
45
46 #define AV_NOPTS_VALUE INT64_C(0x8000000000000000)
47 #define AV_TIME_BASE 1000000
48 #define AV_TIME_BASE_Q (AVRational){1, AV_TIME_BASE}
49
50 /**
51 * Identifies the syntax and semantics of the bitstream.
52 * The principle is roughly:
53 * Two decoders with the same ID can decode the same streams.
54 * Two encoders with the same ID can encode compatible streams.
55 * There may be slight deviations from the principle due to implementation
56 * details.
57 *
58 * If you add a codec ID to this list, add it so that
59 * 1. no value of a existing codec ID changes (that would break ABI),
60 * 2. it is as close as possible to similar codecs.
61 */
62 enum CodecID {
63 CODEC_ID_NONE,
64
65 /* video codecs */
66 CODEC_ID_MPEG1VIDEO,
67 CODEC_ID_MPEG2VIDEO, ///< preferred ID for MPEG-1/2 video decoding
68 CODEC_ID_MPEG2VIDEO_XVMC,
69 CODEC_ID_H261,
70 CODEC_ID_H263,
71 CODEC_ID_RV10,
72 CODEC_ID_RV20,
73 CODEC_ID_MJPEG,
74 CODEC_ID_MJPEGB,
75 CODEC_ID_LJPEG,
76 CODEC_ID_SP5X,
77 CODEC_ID_JPEGLS,
78 CODEC_ID_MPEG4,
79 CODEC_ID_RAWVIDEO,
80 CODEC_ID_MSMPEG4V1,
81 CODEC_ID_MSMPEG4V2,
82 CODEC_ID_MSMPEG4V3,
83 CODEC_ID_WMV1,
84 CODEC_ID_WMV2,
85 CODEC_ID_H263P,
86 CODEC_ID_H263I,
87 CODEC_ID_FLV1,
88 CODEC_ID_SVQ1,
89 CODEC_ID_SVQ3,
90 CODEC_ID_DVVIDEO,
91 CODEC_ID_HUFFYUV,
92 CODEC_ID_CYUV,
93 CODEC_ID_H264,
94 CODEC_ID_INDEO3,
95 CODEC_ID_VP3,
96 CODEC_ID_THEORA,
97 CODEC_ID_ASV1,
98 CODEC_ID_ASV2,
99 CODEC_ID_FFV1,
100 CODEC_ID_4XM,
101 CODEC_ID_VCR1,
102 CODEC_ID_CLJR,
103 CODEC_ID_MDEC,
104 CODEC_ID_ROQ,
105 CODEC_ID_INTERPLAY_VIDEO,
106 CODEC_ID_XAN_WC3,
107 CODEC_ID_XAN_WC4,
108 CODEC_ID_RPZA,
109 CODEC_ID_CINEPAK,
110 CODEC_ID_WS_VQA,
111 CODEC_ID_MSRLE,
112 CODEC_ID_MSVIDEO1,
113 CODEC_ID_IDCIN,
114 CODEC_ID_8BPS,
115 CODEC_ID_SMC,
116 CODEC_ID_FLIC,
117 CODEC_ID_TRUEMOTION1,
118 CODEC_ID_VMDVIDEO,
119 CODEC_ID_MSZH,
120 CODEC_ID_ZLIB,
121 CODEC_ID_QTRLE,
122 CODEC_ID_SNOW,
123 CODEC_ID_TSCC,
124 CODEC_ID_ULTI,
125 CODEC_ID_QDRAW,
126 CODEC_ID_VIXL,
127 CODEC_ID_QPEG,
128 #if LIBAVCODEC_VERSION_MAJOR < 53
129 CODEC_ID_XVID,
130 #endif
131 CODEC_ID_PNG,
132 CODEC_ID_PPM,
133 CODEC_ID_PBM,
134 CODEC_ID_PGM,
135 CODEC_ID_PGMYUV,
136 CODEC_ID_PAM,
137 CODEC_ID_FFVHUFF,
138 CODEC_ID_RV30,
139 CODEC_ID_RV40,
140 CODEC_ID_VC1,
141 CODEC_ID_WMV3,
142 CODEC_ID_LOCO,
143 CODEC_ID_WNV1,
144 CODEC_ID_AASC,
145 CODEC_ID_INDEO2,
146 CODEC_ID_FRAPS,
147 CODEC_ID_TRUEMOTION2,
148 CODEC_ID_BMP,
149 CODEC_ID_CSCD,
150 CODEC_ID_MMVIDEO,
151 CODEC_ID_ZMBV,
152 CODEC_ID_AVS,
153 CODEC_ID_SMACKVIDEO,
154 CODEC_ID_NUV,
155 CODEC_ID_KMVC,
156 CODEC_ID_FLASHSV,
157 CODEC_ID_CAVS,
158 CODEC_ID_JPEG2000,
159 CODEC_ID_VMNC,
160 CODEC_ID_VP5,
161 CODEC_ID_VP6,
162 CODEC_ID_VP6F,
163 CODEC_ID_TARGA,
164 CODEC_ID_DSICINVIDEO,
165 CODEC_ID_TIERTEXSEQVIDEO,
166 CODEC_ID_TIFF,
167 CODEC_ID_GIF,
168 CODEC_ID_FFH264,
169 CODEC_ID_DXA,
170 CODEC_ID_DNXHD,
171 CODEC_ID_THP,
172 CODEC_ID_SGI,
173 CODEC_ID_C93,
174 CODEC_ID_BETHSOFTVID,
175 CODEC_ID_PTX,
176 CODEC_ID_TXD,
177 CODEC_ID_VP6A,
178 CODEC_ID_AMV,
179 CODEC_ID_VB,
180 CODEC_ID_PCX,
181 CODEC_ID_SUNRAST,
182 CODEC_ID_INDEO4,
183 CODEC_ID_INDEO5,
184 CODEC_ID_MIMIC,
185 CODEC_ID_RL2,
186 CODEC_ID_8SVX_EXP,
187 CODEC_ID_8SVX_FIB,
188 CODEC_ID_ESCAPE124,
189 CODEC_ID_DIRAC,
190 CODEC_ID_BFI,
191 CODEC_ID_CMV,
192 CODEC_ID_MOTIONPIXELS,
193 CODEC_ID_TGV,
194 CODEC_ID_TGQ,
195 CODEC_ID_TQI,
196 CODEC_ID_AURA,
197 CODEC_ID_AURA2,
198 CODEC_ID_V210X,
199 CODEC_ID_TMV,
200 CODEC_ID_V210,
201 CODEC_ID_DPX,
202 CODEC_ID_MAD,
203 CODEC_ID_FRWU,
204 CODEC_ID_FLASHSV2,
205 CODEC_ID_CDGRAPHICS,
206 CODEC_ID_R210,
207 CODEC_ID_ANM,
208 CODEC_ID_BINKVIDEO,
209 CODEC_ID_IFF_ILBM,
210 CODEC_ID_IFF_BYTERUN1,
211 CODEC_ID_KGV1,
212 CODEC_ID_YOP,
213
214 /* various PCM "codecs" */
215 CODEC_ID_PCM_S16LE= 0x10000,
216 CODEC_ID_PCM_S16BE,
217 CODEC_ID_PCM_U16LE,
218 CODEC_ID_PCM_U16BE,
219 CODEC_ID_PCM_S8,
220 CODEC_ID_PCM_U8,
221 CODEC_ID_PCM_MULAW,
222 CODEC_ID_PCM_ALAW,
223 CODEC_ID_PCM_S32LE,
224 CODEC_ID_PCM_S32BE,
225 CODEC_ID_PCM_U32LE,
226 CODEC_ID_PCM_U32BE,
227 CODEC_ID_PCM_S24LE,
228 CODEC_ID_PCM_S24BE,
229 CODEC_ID_PCM_U24LE,
230 CODEC_ID_PCM_U24BE,
231 CODEC_ID_PCM_S24DAUD,
232 CODEC_ID_PCM_ZORK,
233 CODEC_ID_PCM_S16LE_PLANAR,
234 CODEC_ID_PCM_DVD,
235 CODEC_ID_PCM_F32BE,
236 CODEC_ID_PCM_F32LE,
237 CODEC_ID_PCM_F64BE,
238 CODEC_ID_PCM_F64LE,
239 CODEC_ID_PCM_BLURAY,
240
241 /* various ADPCM codecs */
242 CODEC_ID_ADPCM_IMA_QT= 0x11000,
243 CODEC_ID_ADPCM_IMA_WAV,
244 CODEC_ID_ADPCM_IMA_DK3,
245 CODEC_ID_ADPCM_IMA_DK4,
246 CODEC_ID_ADPCM_IMA_WS,
247 CODEC_ID_ADPCM_IMA_SMJPEG,
248 CODEC_ID_ADPCM_MS,
249 CODEC_ID_ADPCM_4XM,
250 CODEC_ID_ADPCM_XA,
251 CODEC_ID_ADPCM_ADX,
252 CODEC_ID_ADPCM_EA,
253 CODEC_ID_ADPCM_G726,
254 CODEC_ID_ADPCM_CT,
255 CODEC_ID_ADPCM_SWF,
256 CODEC_ID_ADPCM_YAMAHA,
257 CODEC_ID_ADPCM_SBPRO_4,
258 CODEC_ID_ADPCM_SBPRO_3,
259 CODEC_ID_ADPCM_SBPRO_2,
260 CODEC_ID_ADPCM_THP,
261 CODEC_ID_ADPCM_IMA_AMV,
262 CODEC_ID_ADPCM_EA_R1,
263 CODEC_ID_ADPCM_EA_R3,
264 CODEC_ID_ADPCM_EA_R2,
265 CODEC_ID_ADPCM_IMA_EA_SEAD,
266 CODEC_ID_ADPCM_IMA_EA_EACS,
267 CODEC_ID_ADPCM_EA_XAS,
268 CODEC_ID_ADPCM_EA_MAXIS_XA,
269 CODEC_ID_ADPCM_IMA_ISS,
270
271 /* AMR */
272 CODEC_ID_AMR_NB= 0x12000,
273 CODEC_ID_AMR_WB,
274
275 /* RealAudio codecs*/
276 CODEC_ID_RA_144= 0x13000,
277 CODEC_ID_RA_288,
278
279 /* various DPCM codecs */
280 CODEC_ID_ROQ_DPCM= 0x14000,
281 CODEC_ID_INTERPLAY_DPCM,
282 CODEC_ID_XAN_DPCM,
283 CODEC_ID_SOL_DPCM,
284
285 /* audio codecs */
286 CODEC_ID_MP2= 0x15000,
287 CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3
288 CODEC_ID_AAC,
289 CODEC_ID_AC3,
290 CODEC_ID_DTS,
291 CODEC_ID_VORBIS,
292 CODEC_ID_DVAUDIO,
293 CODEC_ID_WMAV1,
294 CODEC_ID_WMAV2,
295 CODEC_ID_MACE3,
296 CODEC_ID_MACE6,
297 CODEC_ID_VMDAUDIO,
298 CODEC_ID_SONIC,
299 CODEC_ID_SONIC_LS,
300 CODEC_ID_FLAC,
301 CODEC_ID_MP3ADU,
302 CODEC_ID_MP3ON4,
303 CODEC_ID_SHORTEN,
304 CODEC_ID_ALAC,
305 CODEC_ID_WESTWOOD_SND1,
306 CODEC_ID_GSM, ///< as in Berlin toast format
307 CODEC_ID_QDM2,
308 CODEC_ID_COOK,
309 CODEC_ID_TRUESPEECH,
310 CODEC_ID_TTA,
311 CODEC_ID_SMACKAUDIO,
312 CODEC_ID_QCELP,
313 CODEC_ID_WAVPACK,
314 CODEC_ID_DSICINAUDIO,
315 CODEC_ID_IMC,
316 CODEC_ID_MUSEPACK7,
317 CODEC_ID_MLP,
318 CODEC_ID_GSM_MS, /* as found in WAV */
319 CODEC_ID_ATRAC3,
320 CODEC_ID_VOXWARE,
321 CODEC_ID_APE,
322 CODEC_ID_NELLYMOSER,
323 CODEC_ID_MUSEPACK8,
324 CODEC_ID_SPEEX,
325 CODEC_ID_WMAVOICE,
326 CODEC_ID_WMAPRO,
327 CODEC_ID_WMALOSSLESS,
328 CODEC_ID_ATRAC3P,
329 CODEC_ID_EAC3,
330 CODEC_ID_SIPR,
331 CODEC_ID_MP1,
332 CODEC_ID_TWINVQ,
333 CODEC_ID_TRUEHD,
334 CODEC_ID_MP4ALS,
335 CODEC_ID_ATRAC1,
336 CODEC_ID_BINKAUDIO_RDFT,
337 CODEC_ID_BINKAUDIO_DCT,
338
339 /* subtitle codecs */
340 CODEC_ID_DVD_SUBTITLE= 0x17000,
341 CODEC_ID_DVB_SUBTITLE,
342 CODEC_ID_TEXT, ///< raw UTF-8 text
343 CODEC_ID_XSUB,
344 CODEC_ID_SSA,
345 CODEC_ID_MOV_TEXT,
346 CODEC_ID_HDMV_PGS_SUBTITLE,
347 CODEC_ID_DVB_TELETEXT,
348
349 /* other specific kind of codecs (generally used for attachments) */
350 CODEC_ID_TTF= 0x18000,
351
352 CODEC_ID_PROBE= 0x19000, ///< codec_id is not known (like CODEC_ID_NONE) but lavf should attempt to identify it
353
354 CODEC_ID_MPEG2TS= 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS
355 * stream (only used by libavformat) */
356 };
357
358 #if LIBAVCODEC_VERSION_MAJOR < 53
359 #define CodecType AVMediaType
360
361 #define CODEC_TYPE_UNKNOWN AVMEDIA_TYPE_UNKNOWN
362 #define CODEC_TYPE_VIDEO AVMEDIA_TYPE_VIDEO
363 #define CODEC_TYPE_AUDIO AVMEDIA_TYPE_AUDIO
364 #define CODEC_TYPE_DATA AVMEDIA_TYPE_DATA
365 #define CODEC_TYPE_SUBTITLE AVMEDIA_TYPE_SUBTITLE
366 #define CODEC_TYPE_ATTACHMENT AVMEDIA_TYPE_ATTACHMENT
367 #define CODEC_TYPE_NB AVMEDIA_TYPE_NB
368 #endif
369
370 /**
371 * all in native-endian format
372 */
373 enum SampleFormat {
374 SAMPLE_FMT_NONE = -1,
375 SAMPLE_FMT_U8, ///< unsigned 8 bits
376 SAMPLE_FMT_S16, ///< signed 16 bits
377 SAMPLE_FMT_S32, ///< signed 32 bits
378 SAMPLE_FMT_FLT, ///< float
379 SAMPLE_FMT_DBL, ///< double
380 SAMPLE_FMT_NB ///< Number of sample formats. DO NOT USE if dynamically linking to libavcodec
381 };
382
383 /* Audio channel masks */
384 #define CH_FRONT_LEFT 0x00000001
385 #define CH_FRONT_RIGHT 0x00000002
386 #define CH_FRONT_CENTER 0x00000004
387 #define CH_LOW_FREQUENCY 0x00000008
388 #define CH_BACK_LEFT 0x00000010
389 #define CH_BACK_RIGHT 0x00000020
390 #define CH_FRONT_LEFT_OF_CENTER 0x00000040
391 #define CH_FRONT_RIGHT_OF_CENTER 0x00000080
392 #define CH_BACK_CENTER 0x00000100
393 #define CH_SIDE_LEFT 0x00000200
394 #define CH_SIDE_RIGHT 0x00000400
395 #define CH_TOP_CENTER 0x00000800
396 #define CH_TOP_FRONT_LEFT 0x00001000
397 #define CH_TOP_FRONT_CENTER 0x00002000
398 #define CH_TOP_FRONT_RIGHT 0x00004000
399 #define CH_TOP_BACK_LEFT 0x00008000
400 #define CH_TOP_BACK_CENTER 0x00010000
401 #define CH_TOP_BACK_RIGHT 0x00020000
402 #define CH_STEREO_LEFT 0x20000000 ///< Stereo downmix.
403 #define CH_STEREO_RIGHT 0x40000000 ///< See CH_STEREO_LEFT.
404
405 /** Channel mask value used for AVCodecContext.request_channel_layout
406 to indicate that the user requests the channel order of the decoder output
407 to be the native codec channel order. */
408 #define CH_LAYOUT_NATIVE 0x8000000000000000LL
409
410 /* Audio channel convenience macros */
411 #define CH_LAYOUT_MONO (CH_FRONT_CENTER)
412 #define CH_LAYOUT_STEREO (CH_FRONT_LEFT|CH_FRONT_RIGHT)
413 #define CH_LAYOUT_2_1 (CH_LAYOUT_STEREO|CH_BACK_CENTER)
414 #define CH_LAYOUT_SURROUND (CH_LAYOUT_STEREO|CH_FRONT_CENTER)
415 #define CH_LAYOUT_4POINT0 (CH_LAYOUT_SURROUND|CH_BACK_CENTER)
416 #define CH_LAYOUT_2_2 (CH_LAYOUT_STEREO|CH_SIDE_LEFT|CH_SIDE_RIGHT)
417 #define CH_LAYOUT_QUAD (CH_LAYOUT_STEREO|CH_BACK_LEFT|CH_BACK_RIGHT)
418 #define CH_LAYOUT_5POINT0 (CH_LAYOUT_SURROUND|CH_SIDE_LEFT|CH_SIDE_RIGHT)
419 #define CH_LAYOUT_5POINT1 (CH_LAYOUT_5POINT0|CH_LOW_FREQUENCY)
420 #define CH_LAYOUT_5POINT0_BACK (CH_LAYOUT_SURROUND|CH_BACK_LEFT|CH_BACK_RIGHT)
421 #define CH_LAYOUT_5POINT1_BACK (CH_LAYOUT_5POINT0_BACK|CH_LOW_FREQUENCY)
422 #define CH_LAYOUT_7POINT0 (CH_LAYOUT_5POINT0|CH_BACK_LEFT|CH_BACK_RIGHT)
423 #define CH_LAYOUT_7POINT1 (CH_LAYOUT_5POINT1|CH_BACK_LEFT|CH_BACK_RIGHT)
424 #define CH_LAYOUT_7POINT1_WIDE (CH_LAYOUT_5POINT1_BACK|\
425 CH_FRONT_LEFT_OF_CENTER|CH_FRONT_RIGHT_OF_CENTER)
426 #define CH_LAYOUT_STEREO_DOWNMIX (CH_STEREO_LEFT|CH_STEREO_RIGHT)
427
428 /* in bytes */
429 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
430
431 /**
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 * minimum encoding buffer size
442 * Used to avoid some checks during header writing.
443 */
444 #define FF_MIN_BUFFER_SIZE 16384
445
446
447 /**
448 * motion estimation type.
449 */
450 enum Motion_Est_ID {
451 ME_ZERO = 1, ///< no search, that is use 0,0 vector whenever one is needed
452 ME_FULL,
453 ME_LOG,
454 ME_PHODS,
455 ME_EPZS, ///< enhanced predictive zonal search
456 ME_X1, ///< reserved for experiments
457 ME_HEX, ///< hexagon based search
458 ME_UMH, ///< uneven multi-hexagon search
459 ME_ITER, ///< iterative search
460 ME_TESA, ///< transformed exhaustive search algorithm
461 };
462
463 enum AVDiscard{
464 /* We leave some space between them for extensions (drop some
465 * keyframes for intra-only or drop just some bidir frames). */
466 AVDISCARD_NONE =-16, ///< discard nothing
467 AVDISCARD_DEFAULT= 0, ///< discard useless packets like 0 size packets in avi
468 AVDISCARD_NONREF = 8, ///< discard all non reference
469 AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
470 AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
471 AVDISCARD_ALL = 48, ///< discard all
472 };
473
474 enum AVColorPrimaries{
475 AVCOL_PRI_BT709 =1, ///< also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP177 Annex B
476 AVCOL_PRI_UNSPECIFIED=2,
477 AVCOL_PRI_BT470M =4,
478 AVCOL_PRI_BT470BG =5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM
479 AVCOL_PRI_SMPTE170M =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC
480 AVCOL_PRI_SMPTE240M =7, ///< functionally identical to above
481 AVCOL_PRI_FILM =8,
482 AVCOL_PRI_NB , ///< Not part of ABI
483 };
484
485 enum AVColorTransferCharacteristic{
486 AVCOL_TRC_BT709 =1, ///< also ITU-R BT1361
487 AVCOL_TRC_UNSPECIFIED=2,
488 AVCOL_TRC_GAMMA22 =4, ///< also ITU-R BT470M / ITU-R BT1700 625 PAL & SECAM
489 AVCOL_TRC_GAMMA28 =5, ///< also ITU-R BT470BG
490 AVCOL_TRC_NB , ///< Not part of ABI
491 };
492
493 enum AVColorSpace{
494 AVCOL_SPC_RGB =0,
495 AVCOL_SPC_BT709 =1, ///< also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
496 AVCOL_SPC_UNSPECIFIED=2,
497 AVCOL_SPC_FCC =4,
498 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
499 AVCOL_SPC_SMPTE170M =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC / functionally identical to above
500 AVCOL_SPC_SMPTE240M =7,
501 AVCOL_SPC_NB , ///< Not part of ABI
502 };
503
504 enum AVColorRange{
505 AVCOL_RANGE_UNSPECIFIED=0,
506 AVCOL_RANGE_MPEG =1, ///< the normal 219*2^(n-8) "MPEG" YUV ranges
507 AVCOL_RANGE_JPEG =2, ///< the normal 2^n-1 "JPEG" YUV ranges
508 AVCOL_RANGE_NB , ///< Not part of ABI
509 };
510
511 /**
512 * X X 3 4 X X are luma samples,
513 * 1 2 1-6 are possible chroma positions
514 * X X 5 6 X 0 is undefined/unknown position
515 */
516 enum AVChromaLocation{
517 AVCHROMA_LOC_UNSPECIFIED=0,
518 AVCHROMA_LOC_LEFT =1, ///< mpeg2/4, h264 default
519 AVCHROMA_LOC_CENTER =2, ///< mpeg1, jpeg, h263
520 AVCHROMA_LOC_TOPLEFT =3, ///< DV
521 AVCHROMA_LOC_TOP =4,
522 AVCHROMA_LOC_BOTTOMLEFT =5,
523 AVCHROMA_LOC_BOTTOM =6,
524 AVCHROMA_LOC_NB , ///< Not part of ABI
525 };
526
527 typedef struct RcOverride{
528 int start_frame;
529 int end_frame;
530 int qscale; // If this is 0 then quality_factor will be used instead.
531 float quality_factor;
532 } RcOverride;
533
534 #define FF_MAX_B_FRAMES 16
535
536 /* encoding support
537 These flags can be passed in AVCodecContext.flags before initialization.
538 Note: Not everything is supported yet.
539 */
540
541 #define CODEC_FLAG_QSCALE 0x0002 ///< Use fixed qscale.
542 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / advanced prediction for H.263.
543 #define CODEC_FLAG_QPEL 0x0010 ///< Use qpel MC.
544 #define CODEC_FLAG_GMC 0x0020 ///< Use GMC.
545 #define CODEC_FLAG_MV0 0x0040 ///< Always try a MB with MV=<0,0>.
546 #define CODEC_FLAG_PART 0x0080 ///< Use data partitioning.
547 /**
548 * The parent program guarantees that the input for B-frames containing
549 * streams is not written to for at least s->max_b_frames+1 frames, if
550 * this is not set the input will be copied.
551 */
552 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
553 #define CODEC_FLAG_PASS1 0x0200 ///< Use internal 2pass ratecontrol in first pass mode.
554 #define CODEC_FLAG_PASS2 0x0400 ///< Use internal 2pass ratecontrol in second pass mode.
555 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< Use external Huffman table (for MJPEG).
556 #define CODEC_FLAG_GRAY 0x2000 ///< Only decode/encode grayscale.
557 #define CODEC_FLAG_EMU_EDGE 0x4000 ///< Don't draw edges.
558 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding.
559 #define CODEC_FLAG_TRUNCATED 0x00010000 /** Input bitstream might be truncated at a random
560 location instead of only at frame boundaries. */
561 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< Normalize adaptive quantization.
562 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT.
563 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< Force low delay.
564 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< Use alternate scan.
565 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< Place global headers in extradata instead of every keyframe.
566 #define CODEC_FLAG_BITEXACT 0x00800000 ///< Use only bitexact stuff (except (I)DCT).
567 /* Fx : Flag for h263+ extra options */
568 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction
569 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< unlimited motion vector
570 #define CODEC_FLAG_CBP_RD 0x04000000 ///< Use rate distortion optimization for cbp.
571 #define CODEC_FLAG_QP_RD 0x08000000 ///< Use rate distortion optimization for qp selectioon.
572 #define CODEC_FLAG_H263P_AIV 0x00000008 ///< H.263 alternative inter VLC
573 #define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
574 #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
575 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
576 #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
577 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< Will reserve space for SVCD scan offset user data.
578 #define CODEC_FLAG_CLOSED_GOP 0x80000000
579 #define CODEC_FLAG2_FAST 0x00000001 ///< Allow non spec compliant speedup tricks.
580 #define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< Strictly enforce GOP size.
581 #define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< Skip bitstream encoding.
582 #define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< Place global headers at every keyframe instead of in extradata.
583 #define CODEC_FLAG2_BPYRAMID 0x00000010 ///< H.264 allow B-frames to be used as references.
584 #define CODEC_FLAG2_WPRED 0x00000020 ///< H.264 weighted biprediction for B-frames
585 #define CODEC_FLAG2_MIXED_REFS 0x00000040 ///< H.264 one reference per partition, as opposed to one reference per macroblock
586 #define CODEC_FLAG2_8X8DCT 0x00000080 ///< H.264 high profile 8x8 transform
587 #define CODEC_FLAG2_FASTPSKIP 0x00000100 ///< H.264 fast pskip
588 #define CODEC_FLAG2_AUD 0x00000200 ///< H.264 access unit delimiters
589 #define CODEC_FLAG2_BRDO 0x00000400 ///< B-frame rate-distortion optimization
590 #define CODEC_FLAG2_INTRA_VLC 0x00000800 ///< Use MPEG-2 intra VLC table.
591 #define CODEC_FLAG2_MEMC_ONLY 0x00001000 ///< Only do ME/MC (I frames -> ref, P frame -> ME+MC).
592 #define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format.
593 #define CODEC_FLAG2_SKIP_RD 0x00004000 ///< RD optimal MB level residual skipping
594 #define CODEC_FLAG2_CHUNKS 0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
595 #define CODEC_FLAG2_NON_LINEAR_QUANT 0x00010000 ///< Use MPEG-2 nonlinear quantizer.
596 #define CODEC_FLAG2_BIT_RESERVOIR 0x00020000 ///< Use a bit reservoir when encoding if possible
597 #define CODEC_FLAG2_MBTREE 0x00040000 ///< Use macroblock tree ratecontrol (x264 only)
598 #define CODEC_FLAG2_PSY 0x00080000 ///< Use psycho visual optimizations.
599 #define CODEC_FLAG2_SSIM 0x00100000 ///< Compute SSIM during encoding, error[] values are undefined.
600 #define CODEC_FLAG2_INTRA_REFRESH 0x00200000 ///< Use periodic insertion of intra blocks instead of keyframes.
601
602 /* Unsupported options :
603 * Syntax Arithmetic coding (SAC)
604 * Reference Picture Selection
605 * Independent Segment Decoding */
606 /* /Fx */
607 /* codec capabilities */
608
609 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback.
610 /**
611 * Codec uses get_buffer() for allocating buffers and supports custom allocators.
612 * If not set, it might not use get_buffer() at all or use operations that
613 * assume the buffer was allocated by avcodec_default_get_buffer.
614 */
615 #define CODEC_CAP_DR1 0x0002
616 /* If 'parse_only' field is true, then avcodec_parse_frame() can be used. */
617 #define CODEC_CAP_PARSE_ONLY 0x0004
618 #define CODEC_CAP_TRUNCATED 0x0008
619 /* Codec can export data for HW decoding (XvMC). */
620 #define CODEC_CAP_HWACCEL 0x0010
621 /**
622 * Codec has a nonzero delay and needs to be fed with NULL at the end to get the delayed data.
623 * If this is not set, the codec is guaranteed to never be fed with NULL data.
624 */
625 #define CODEC_CAP_DELAY 0x0020
626 /**
627 * Codec can be fed a final frame with a smaller size.
628 * This can be used to prevent truncation of the last audio samples.
629 */
630 #define CODEC_CAP_SMALL_LAST_FRAME 0x0040
631 /**
632 * Codec can export data for HW decoding (VDPAU).
633 */
634 #define CODEC_CAP_HWACCEL_VDPAU 0x0080
635 /**
636 * Codec can output multiple frames per AVPacket
637 * Normally demuxers return one frame at a time, demuxers which do not do
638 * are connected to a parser to split what they return into proper frames.
639 * This flag is reserved to the very rare category of codecs which have a
640 * bitstream that cannot be split into frames without timeconsuming
641 * operations like full decoding. Demuxers carring such bitstreams thus
642 * may return multiple frames in a packet. This has many disadvantages like
643 * prohibiting stream copy in many cases thus it should only be considered
644 * as a last resort.
645 */
646 #define CODEC_CAP_SUBFRAMES 0x0100
647
648 //The following defines may change, don't expect compatibility if you use them.
649 #define MB_TYPE_INTRA4x4 0x0001
650 #define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
651 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME H.264-specific
652 #define MB_TYPE_16x16 0x0008
653 #define MB_TYPE_16x8 0x0010
654 #define MB_TYPE_8x16 0x0020
655 #define MB_TYPE_8x8 0x0040
656 #define MB_TYPE_INTERLACED 0x0080
657 #define MB_TYPE_DIRECT2 0x0100 //FIXME
658 #define MB_TYPE_ACPRED 0x0200
659 #define MB_TYPE_GMC 0x0400
660 #define MB_TYPE_SKIP 0x0800
661 #define MB_TYPE_P0L0 0x1000
662 #define MB_TYPE_P1L0 0x2000
663 #define MB_TYPE_P0L1 0x4000
664 #define MB_TYPE_P1L1 0x8000
665 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
666 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
667 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
668 #define MB_TYPE_QUANT 0x00010000
669 #define MB_TYPE_CBP 0x00020000
670 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
671
672 /**
673 * Pan Scan area.
674 * This specifies the area which should be displayed.
675 * Note there may be multiple such areas for one frame.
676 */
677 typedef struct AVPanScan{
678 /**
679 * id
680 * - encoding: Set by user.
681 * - decoding: Set by libavcodec.
682 */
683 int id;
684
685 /**
686 * width and height in 1/16 pel
687 * - encoding: Set by user.
688 * - decoding: Set by libavcodec.
689 */
690 int width;
691 int height;
692
693 /**
694 * position of the top left corner in 1/16 pel for up to 3 fields/frames
695 * - encoding: Set by user.
696 * - decoding: Set by libavcodec.
697 */
698 int16_t position[3][2];
699 }AVPanScan;
700
701 #define FF_COMMON_FRAME \
702 /**\
703 * pointer to the picture planes.\
704 * This might be different from the first allocated byte\
705 * - encoding: \
706 * - decoding: \
707 */\
708 uint8_t *data[4];\
709 int linesize[4];\
710 /**\
711 * pointer to the first allocated byte of the picture. Can be used in get_buffer/release_buffer.\
712 * This isn't used by libavcodec unless the default get/release_buffer() is used.\
713 * - encoding: \
714 * - decoding: \
715 */\
716 uint8_t *base[4];\
717 /**\
718 * 1 -> keyframe, 0-> not\
719 * - encoding: Set by libavcodec.\
720 * - decoding: Set by libavcodec.\
721 */\
722 int key_frame;\
723 \
724 /**\
725 * Picture type of the frame, see ?_TYPE below.\
726 * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
727 * - decoding: Set by libavcodec.\
728 */\
729 int pict_type;\
730 \
731 /**\
732 * presentation timestamp in time_base units (time when frame should be shown to user)\
733 * If AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed.\
734 * - encoding: MUST be set by user.\
735 * - decoding: Set by libavcodec.\
736 */\
737 int64_t pts;\
738 \
739 /**\
740 * picture number in bitstream order\
741 * - encoding: set by\
742 * - decoding: Set by libavcodec.\
743 */\
744 int coded_picture_number;\
745 /**\
746 * picture number in display order\
747 * - encoding: set by\
748 * - decoding: Set by libavcodec.\
749 */\
750 int display_picture_number;\
751 \
752 /**\
753 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
754 * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
755 * - decoding: Set by libavcodec.\
756 */\
757 int quality; \
758 \
759 /**\
760 * buffer age (1->was last buffer and dint change, 2->..., ...).\
761 * Set to INT_MAX if the buffer has not been used yet.\
762 * - encoding: unused\
763 * - decoding: MUST be set by get_buffer().\
764 */\
765 int age;\
766 \
767 /**\
768 * is this picture used as reference\
769 * The values for this are the same as the MpegEncContext.picture_structure\
770 * variable, that is 1->top field, 2->bottom field, 3->frame/both fields.\
771 * Set to 4 for delayed, non-reference frames.\
772 * - encoding: unused\
773 * - decoding: Set by libavcodec. (before get_buffer() call)).\
774 */\
775 int reference;\
776 \
777 /**\
778 * QP table\
779 * - encoding: unused\
780 * - decoding: Set by libavcodec.\
781 */\
782 int8_t *qscale_table;\
783 /**\
784 * QP store stride\
785 * - encoding: unused\
786 * - decoding: Set by libavcodec.\
787 */\
788 int qstride;\
789 \
790 /**\
791 * mbskip_table[mb]>=1 if MB didn't change\
792 * stride= mb_width = (width+15)>>4\
793 * - encoding: unused\
794 * - decoding: Set by libavcodec.\
795 */\
796 uint8_t *mbskip_table;\
797 \
798 /**\
799 * motion vector table\
800 * @code\
801 * example:\
802 * int mv_sample_log2= 4 - motion_subsample_log2;\
803 * int mb_width= (width+15)>>4;\
804 * int mv_stride= (mb_width << mv_sample_log2) + 1;\
805 * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
806 * @endcode\
807 * - encoding: Set by user.\
808 * - decoding: Set by libavcodec.\
809 */\
810 int16_t (*motion_val[2])[2];\
811 \
812 /**\
813 * macroblock type table\
814 * mb_type_base + mb_width + 2\
815 * - encoding: Set by user.\
816 * - decoding: Set by libavcodec.\
817 */\
818 uint32_t *mb_type;\
819 \
820 /**\
821 * log2 of the size of the block which a single vector in motion_val represents: \
822 * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
823 * - encoding: unused\
824 * - decoding: Set by libavcodec.\
825 */\
826 uint8_t motion_subsample_log2;\
827 \
828 /**\
829 * for some private data of the user\
830 * - encoding: unused\
831 * - decoding: Set by user.\
832 */\
833 void *opaque;\
834 \
835 /**\
836 * error\
837 * - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR.\
838 * - decoding: unused\
839 */\
840 uint64_t error[4];\
841 \
842 /**\
843 * type of the buffer (to keep track of who has to deallocate data[*])\
844 * - encoding: Set by the one who allocates it.\
845 * - decoding: Set by the one who allocates it.\
846 * Note: User allocated (direct rendering) & internal buffers cannot coexist currently.\
847 */\
848 int type;\
849 \
850 /**\
851 * When decoding, this signals how much the picture must be delayed.\
852 * extra_delay = repeat_pict / (2*fps)\
853 * - encoding: unused\
854 * - decoding: Set by libavcodec.\
855 */\
856 int repeat_pict;\
857 \
858 /**\
859 * \
860 */\
861 int qscale_type;\
862 \
863 /**\
864 * The content of the picture is interlaced.\
865 * - encoding: Set by user.\
866 * - decoding: Set by libavcodec. (default 0)\
867 */\
868 int interlaced_frame;\
869 \
870 /**\
871 * If the content is interlaced, is top field displayed first.\
872 * - encoding: Set by user.\
873 * - decoding: Set by libavcodec.\
874 */\
875 int top_field_first;\
876 \
877 /**\
878 * Pan scan.\
879 * - encoding: Set by user.\
880 * - decoding: Set by libavcodec.\
881 */\
882 AVPanScan *pan_scan;\
883 \
884 /**\
885 * Tell user application that palette has changed from previous frame.\
886 * - encoding: ??? (no palette-enabled encoder yet)\
887 * - decoding: Set by libavcodec. (default 0).\
888 */\
889 int palette_has_changed;\
890 \
891 /**\
892 * codec suggestion on buffer type if != 0\
893 * - encoding: unused\
894 * - decoding: Set by libavcodec. (before get_buffer() call)).\
895 */\
896 int buffer_hints;\
897 \
898 /**\
899 * DCT coefficients\
900 * - encoding: unused\
901 * - decoding: Set by libavcodec.\
902 */\
903 short *dct_coeff;\
904 \
905 /**\
906 * motion reference frame index\
907 * the order in which these are stored can depend on the codec.\
908 * - encoding: Set by user.\
909 * - decoding: Set by libavcodec.\
910 */\
911 int8_t *ref_index[2];\
912 \
913 /**\
914 * reordered opaque 64bit number (generally a PTS) from AVCodecContext.reordered_opaque\
915 * output in AVFrame.reordered_opaque\
916 * - encoding: unused\
917 * - decoding: Read by user.\
918 */\
919 int64_t reordered_opaque;\
920 \
921 /**\
922 * hardware accelerator private data (FFmpeg allocated)\
923 * - encoding: unused\
924 * - decoding: Set by libavcodec\
925 */\
926 void *hwaccel_picture_private;\
927
928
929 #define FF_QSCALE_TYPE_MPEG1 0
930 #define FF_QSCALE_TYPE_MPEG2 1
931 #define FF_QSCALE_TYPE_H264 2
932 #define FF_QSCALE_TYPE_VP56 3
933
934 #define FF_BUFFER_TYPE_INTERNAL 1
935 #define FF_BUFFER_TYPE_USER 2 ///< direct rendering buffers (image is (de)allocated by user)
936 #define FF_BUFFER_TYPE_SHARED 4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared.
937 #define FF_BUFFER_TYPE_COPY 8 ///< Just a (modified) copy of some other buffer, don't deallocate anything.
938
939
940 #define FF_I_TYPE 1 ///< Intra
941 #define FF_P_TYPE 2 ///< Predicted
942 #define FF_B_TYPE 3 ///< Bi-dir predicted
943 #define FF_S_TYPE 4 ///< S(GMC)-VOP MPEG4
944 #define FF_SI_TYPE 5 ///< Switching Intra
945 #define FF_SP_TYPE 6 ///< Switching Predicted
946 #define FF_BI_TYPE 7
947
948 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore).
949 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer.
950 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content.
951 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update).
952
953 typedef struct AVPacket {
954 /**
955 * Presentation timestamp in AVStream->time_base units; the time at which
956 * the decompressed packet will be presented to the user.
957 * Can be AV_NOPTS_VALUE if it is not stored in the file.
958 * pts MUST be larger or equal to dts as presentation cannot happen before
959 * decompression, unless one wants to view hex dumps. Some formats misuse
960 * the terms dts and pts/cts to mean something different. Such timestamps
961 * must be converted to true pts/dts before they are stored in AVPacket.
962 */
963 int64_t pts;
964 /**
965 * Decompression timestamp in AVStream->time_base units; the time at which
966 * the packet is decompressed.
967 * Can be AV_NOPTS_VALUE if it is not stored in the file.
968 */
969 int64_t dts;
970 uint8_t *data;
971 int size;
972 int stream_index;
973 int flags;
974 /**
975 * Duration of this packet in AVStream->time_base units, 0 if unknown.
976 * Equals next_pts - this_pts in presentation order.
977 */
978 int duration;
979 void (*destruct)(struct AVPacket *);
980 void *priv;
981 int64_t pos; ///< byte position in stream, -1 if unknown
982
983 /**
984 * Time difference in AVStream->time_base units from the pts of this
985 * packet to the point at which the output from the decoder has converged
986 * independent from the availability of previous frames. That is, the
987 * frames are virtually identical no matter if decoding started from
988 * the very first frame or from this keyframe.
989 * Is AV_NOPTS_VALUE if unknown.
990 * This field is not the display duration of the current packet.
991 *
992 * The purpose of this field is to allow seeking in streams that have no
993 * keyframes in the conventional sense. It corresponds to the
994 * recovery point SEI in H.264 and match_time_delta in NUT. It is also
995 * essential for some types of subtitle streams to ensure that all
996 * subtitles are correctly displayed after seeking.
997 */
998 int64_t convergence_duration;
999 } AVPacket;
1000 #define AV_PKT_FLAG_KEY 0x0001
1001 #if LIBAVCODEC_VERSION_MAJOR < 53
1002 #define PKT_FLAG_KEY AV_PKT_FLAG_KEY
1003 #endif
1004
1005 /**
1006 * Audio Video Frame.
1007 * New fields can be added to the end of FF_COMMON_FRAME with minor version
1008 * bumps.
1009 * Removal, reordering and changes to existing fields require a major
1010 * version bump. No fields should be added into AVFrame before or after
1011 * FF_COMMON_FRAME!
1012 * sizeof(AVFrame) must not be used outside libav*.
1013 */
1014 typedef struct AVFrame {
1015 FF_COMMON_FRAME
1016 } AVFrame;
1017
1018 /**
1019 * main external API structure.
1020 * New fields can be added to the end with minor version bumps.
1021 * Removal, reordering and changes to existing fields require a major
1022 * version bump.
1023 * sizeof(AVCodecContext) must not be used outside libav*.
1024 */
1025 typedef struct AVCodecContext {
1026 /**
1027 * information on struct for av_log
1028 * - set by avcodec_alloc_context
1029 */
1030 const AVClass *av_class;
1031 /**
1032 * the average bitrate
1033 * - encoding: Set by user; unused for constant quantizer encoding.
1034 * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.
1035 */
1036 int bit_rate;
1037
1038 /**
1039 * number of bits the bitstream is allowed to diverge from the reference.
1040 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
1041 * - encoding: Set by user; unused for constant quantizer encoding.
1042 * - decoding: unused
1043 */
1044 int bit_rate_tolerance;
1045
1046 /**
1047 * CODEC_FLAG_*.
1048 * - encoding: Set by user.
1049 * - decoding: Set by user.
1050 */
1051 int flags;
1052
1053 /**
1054 * Some codecs need additional format info. It is stored here.
1055 * If any muxer uses this then ALL demuxers/parsers AND encoders for the
1056 * specific codec MUST set it correctly otherwise stream copy breaks.
1057 * In general use of this field by muxers is not recommanded.
1058 * - encoding: Set by libavcodec.
1059 * - decoding: Set by libavcodec. (FIXME: Is this OK?)
1060 */
1061 int sub_id;
1062
1063 /**
1064 * Motion estimation algorithm used for video coding.
1065 * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
1066 * 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific]
1067 * - encoding: MUST be set by user.
1068 * - decoding: unused
1069 */
1070 int me_method;
1071
1072 /**
1073 * some codecs need / can use extradata like Huffman tables.
1074 * mjpeg: Huffman tables
1075 * rv10: additional flags
1076 * mpeg4: global headers (they can be in the bitstream or here)
1077 * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
1078 * than extradata_size to avoid prolems if it is read with the bitstream reader.
1079 * The bytewise contents of extradata must not depend on the architecture or CPU endianness.
1080 * - encoding: Set/allocated/freed by libavcodec.
1081 * - decoding: Set/allocated/freed by user.
1082 */
1083 uint8_t *extradata;
1084 int extradata_size;
1085
1086 /**
1087 * This is the fundamental unit of time (in seconds) in terms
1088 * of which frame timestamps are represented. For fixed-fps content,
1089 * timebase should be 1/framerate and timestamp increments should be
1090 * identically 1.
1091 * - encoding: MUST be set by user.
1092 * - decoding: Set by libavcodec.
1093 */
1094 AVRational time_base;
1095
1096 /* video only */
1097 /**
1098 * picture width / height.
1099 * - encoding: MUST be set by user.
1100 * - decoding: Set by libavcodec.
1101 * Note: For compatibility it is possible to set this instead of
1102 * coded_width/height before decoding.
1103 */
1104 int width, height;
1105
1106 #define FF_ASPECT_EXTENDED 15
1107
1108 /**
1109 * the number of pictures in a group of pictures, or 0 for intra_only
1110 * - encoding: Set by user.
1111 * - decoding: unused
1112 */
1113 int gop_size;
1114
1115 /**
1116 * Pixel format, see PIX_FMT_xxx.
1117 * - encoding: Set by user.
1118 * - decoding: Set by libavcodec.
1119 */
1120 enum PixelFormat pix_fmt;
1121
1122 /**
1123 * Frame rate emulation. If not zero, the lower layer (i.e. format handler)
1124 * has to read frames at native frame rate.
1125 * - encoding: Set by user.
1126 * - decoding: unused
1127 */
1128 int rate_emu;
1129
1130 /**
1131 * If non NULL, 'draw_horiz_band' is called by the libavcodec
1132 * decoder to draw a horizontal band. It improves cache usage. Not
1133 * all codecs can do that. You must check the codec capabilities
1134 * beforehand.
1135 * The function is also used by hardware acceleration APIs.
1136 * It is called at least once during frame decoding to pass
1137 * the data needed for hardware render.
1138 * In that mode instead of pixel data, AVFrame points to
1139 * a structure specific to the acceleration API. The application
1140 * reads the structure and can change some fields to indicate progress
1141 * or mark state.
1142 * - encoding: unused
1143 * - decoding: Set by user.
1144 * @param height the height of the slice
1145 * @param y the y position of the slice
1146 * @param type 1->top field, 2->bottom field, 3->frame
1147 * @param offset offset into the AVFrame.data from which the slice should be read
1148 */
1149 void (*draw_horiz_band)(struct AVCodecContext *s,
1150 const AVFrame *src, int offset[4],
1151 int y, int type, int height);
1152
1153 /* audio only */
1154 int sample_rate; ///< samples per second
1155 int channels; ///< number of audio channels
1156
1157 /**
1158 * audio sample format
1159 * - encoding: Set by user.
1160 * - decoding: Set by libavcodec.
1161 */
1162 enum SampleFormat sample_fmt; ///< sample format
1163
1164 /* The following data should not be initialized. */
1165 /**
1166 * Samples per packet, initialized when calling 'init'.
1167 */
1168 int frame_size;
1169 int frame_number; ///< audio or video frame number
1170 #if LIBAVCODEC_VERSION_MAJOR < 53
1171 int real_pict_num; ///< Returns the real picture number of previous encoded frame.
1172 #endif
1173
1174 /**
1175 * Number of frames the decoded output will be delayed relative to
1176 * the encoded input.
1177 * - encoding: Set by libavcodec.
1178 * - decoding: unused
1179 */
1180 int delay;
1181
1182 /* - encoding parameters */
1183 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
1184 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
1185
1186 /**
1187 * minimum quantizer
1188 * - encoding: Set by user.
1189 * - decoding: unused
1190 */
1191 int qmin;
1192
1193 /**
1194 * maximum quantizer
1195 * - encoding: Set by user.
1196 * - decoding: unused
1197 */
1198 int qmax;
1199
1200 /**
1201 * maximum quantizer difference between frames
1202 * - encoding: Set by user.
1203 * - decoding: unused
1204 */
1205 int max_qdiff;
1206
1207 /**
1208 * maximum number of B-frames between non-B-frames
1209 * Note: The output will be delayed by max_b_frames+1 relative to the input.
1210 * - encoding: Set by user.
1211 * - decoding: unused
1212 */
1213 int max_b_frames;
1214
1215 /**
1216 * qscale factor between IP and B-frames
1217 * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
1218 * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1219 * - encoding: Set by user.
1220 * - decoding: unused
1221 */
1222 float b_quant_factor;
1223
1224 /** obsolete FIXME remove */
1225 int rc_strategy;
1226 #define FF_RC_STRATEGY_XVID 1
1227
1228 int b_frame_strategy;
1229
1230 /**
1231 * hurry up amount
1232 * - encoding: unused
1233 * - decoding: Set by user. 1-> Skip B-frames, 2-> Skip IDCT/dequant too, 5-> Skip everything except header
1234 * @deprecated Deprecated in favor of skip_idct and skip_frame.
1235 */
1236 int hurry_up;
1237
1238 struct AVCodec *codec;
1239
1240 void *priv_data;
1241
1242 int rtp_payload_size; /* The size of the RTP payload: the coder will */
1243 /* do its best to deliver a chunk with size */
1244 /* below rtp_payload_size, the chunk will start */
1245 /* with a start code on some codecs like H.263. */
1246 /* This doesn't take account of any particular */
1247 /* headers inside the transmitted RTP payload. */
1248
1249
1250 /* The RTP callback: This function is called */
1251 /* every time the encoder has a packet to send. */
1252 /* It depends on the encoder if the data starts */
1253 /* with a Start Code (it should). H.263 does. */
1254 /* mb_nb contains the number of macroblocks */
1255 /* encoded in the RTP payload. */
1256 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
1257
1258 /* statistics, used for 2-pass encoding */
1259 int mv_bits;
1260 int header_bits;
1261 int i_tex_bits;
1262 int p_tex_bits;
1263 int i_count;
1264 int p_count;
1265 int skip_count;
1266 int misc_bits;
1267
1268 /**
1269 * number of bits used for the previously encoded frame
1270 * - encoding: Set by libavcodec.
1271 * - decoding: unused
1272 */
1273 int frame_bits;
1274
1275 /**
1276 * Private data of the user, can be used to carry app specific stuff.
1277 * - encoding: Set by user.
1278 * - decoding: Set by user.
1279 */
1280 void *opaque;
1281
1282 char codec_name[32];
1283 enum AVMediaType codec_type; /* see AVMEDIA_TYPE_xxx */
1284 enum CodecID codec_id; /* see CODEC_ID_xxx */
1285
1286 /**
1287 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1288 * This is used to work around some encoder bugs.
1289 * A demuxer should set this to what is stored in the field used to identify the codec.
1290 * If there are multiple such fields in a container then the demuxer should choose the one
1291 * which maximizes the information about the used codec.
1292 * If the codec tag field in a container is larger then 32 bits then the demuxer should
1293 * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
1294 * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
1295 * first.
1296 * - encoding: Set by user, if not then the default based on codec_id will be used.
1297 * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1298 */
1299 unsigned int codec_tag;
1300
1301 /**
1302 * Work around bugs in encoders which sometimes cannot be detected automatically.
1303 * - encoding: Set by user
1304 * - decoding: Set by user
1305 */
1306 int workaround_bugs;
1307 #define FF_BUG_AUTODETECT 1 ///< autodetection
1308 #define FF_BUG_OLD_MSMPEG4 2
1309 #define FF_BUG_XVID_ILACE 4
1310 #define FF_BUG_UMP4 8
1311 #define FF_BUG_NO_PADDING 16
1312 #define FF_BUG_AMV 32
1313 #define FF_BUG_AC_VLC 0 ///< Will be removed, libavcodec can now handle these non-compliant files by default.
1314 #define FF_BUG_QPEL_CHROMA 64
1315 #define FF_BUG_STD_QPEL 128
1316 #define FF_BUG_QPEL_CHROMA2 256
1317 #define FF_BUG_DIRECT_BLOCKSIZE 512
1318 #define FF_BUG_EDGE 1024
1319 #define FF_BUG_HPEL_CHROMA 2048
1320 #define FF_BUG_DC_CLIP 4096
1321 #define FF_BUG_MS 8192 ///< Work around various bugs in Microsoft's broken decoders.
1322 #define FF_BUG_TRUNCATED 16384
1323 //#define FF_BUG_FAKE_SCALABILITY 16 //Autodetection should work 100%.
1324
1325 /**
1326 * luma single coefficient elimination threshold
1327 * - encoding: Set by user.
1328 * - decoding: unused
1329 */
1330 int luma_elim_threshold;
1331
1332 /**
1333 * chroma single coeff elimination threshold
1334 * - encoding: Set by user.
1335 * - decoding: unused
1336 */
1337 int chroma_elim_threshold;
1338
1339 /**
1340 * strictly follow the standard (MPEG4, ...).
1341 * - encoding: Set by user.
1342 * - decoding: Set by user.
1343 * Setting this to STRICT or higher means the encoder and decoder will
1344 * generally do stupid things. While setting it to inofficial or lower
1345 * will mean the encoder might use things that are not supported by all
1346 * spec compliant decoders. Decoders make no difference between normal,
1347 * inofficial and experimental, that is they always try to decode things
1348 * when they can unless they are explicitly asked to behave stupid
1349 * (=strictly conform to the specs)
1350 */
1351 int strict_std_compliance;
1352 #define FF_COMPLIANCE_VERY_STRICT 2 ///< Strictly conform to a older more strict version of the spec or reference software.
1353 #define FF_COMPLIANCE_STRICT 1 ///< Strictly conform to all the things in the spec no matter what consequences.
1354 #define FF_COMPLIANCE_NORMAL 0
1355 #define FF_COMPLIANCE_INOFFICIAL -1 ///< Allow inofficial extensions.
1356 #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
1357
1358 /**
1359 * qscale offset between IP and B-frames
1360 * - encoding: Set by user.
1361 * - decoding: unused
1362 */
1363 float b_quant_offset;
1364
1365 /**
1366 * Error recognization; higher values will detect more errors but may
1367 * misdetect some more or less valid parts as errors.
1368 * - encoding: unused
1369 * - decoding: Set by user.
1370 */
1371 int error_recognition;
1372 #define FF_ER_CAREFUL 1
1373 #define FF_ER_COMPLIANT 2
1374 #define FF_ER_AGGRESSIVE 3
1375 #define FF_ER_VERY_AGGRESSIVE 4
1376
1377 /**
1378 * Called at the beginning of each frame to get a buffer for it.
1379 * If pic.reference is set then the frame will be read later by libavcodec.
1380 * avcodec_align_dimensions2() should be used to find the required width and
1381 * height, as they normally need to be rounded up to the next multiple of 16.
1382 * if CODEC_CAP_DR1 is not set then get_buffer() must call
1383 * avcodec_default_get_buffer() instead of providing buffers allocated by
1384 * some other means.
1385 * - encoding: unused
1386 * - decoding: Set by libavcodec., user can override.
1387 */
1388 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1389
1390 /**
1391 * Called to release buffers which were allocated with get_buffer.
1392 * A released buffer can be reused in get_buffer().
1393 * pic.data[*] must be set to NULL.
1394 * - encoding: unused
1395 * - decoding: Set by libavcodec., user can override.
1396 */
1397 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1398
1399 /**
1400 * Size of the frame reordering buffer in the decoder.
1401 * For MPEG-2 it is 1 IPB or 0 low delay IP.
1402 * - encoding: Set by libavcodec.
1403 * - decoding: Set by libavcodec.
1404 */
1405 int has_b_frames;
1406
1407 /**
1408 * number of bytes per packet if constant and known or 0
1409 * Used by some WAV based audio codecs.
1410 */
1411 int block_align;
1412
1413 int parse_only; /* - decoding only: If true, only parsing is done
1414 (function avcodec_parse_frame()). The frame
1415 data is returned. Only MPEG codecs support this now. */
1416
1417 /**
1418 * 0-> h263 quant 1-> mpeg quant
1419 * - encoding: Set by user.
1420 * - decoding: unused
1421 */
1422 int mpeg_quant;
1423
1424 /**
1425 * pass1 encoding statistics output buffer
1426 * - encoding: Set by libavcodec.
1427 * - decoding: unused
1428 */
1429 char *stats_out;
1430
1431 /**
1432 * pass2 encoding statistics input buffer
1433 * Concatenated stuff from stats_out of pass1 should be placed here.
1434 * - encoding: Allocated/set/freed by user.
1435 * - decoding: unused
1436 */
1437 char *stats_in;
1438
1439 /**
1440 * ratecontrol qmin qmax limiting method
1441 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
1442 * - encoding: Set by user.
1443 * - decoding: unused
1444 */
1445 float rc_qsquish;
1446
1447 float rc_qmod_amp;
1448 int rc_qmod_freq;
1449
1450 /**
1451 * ratecontrol override, see RcOverride
1452 * - encoding: Allocated/set/freed by user.
1453 * - decoding: unused
1454 */
1455 RcOverride *rc_override;
1456 int rc_override_count;
1457
1458 /**
1459 * rate control equation
1460 * - encoding: Set by user
1461 * - decoding: unused
1462 */
1463 const char *rc_eq;
1464
1465 /**
1466 * maximum bitrate
1467 * - encoding: Set by user.
1468 * - decoding: unused
1469 */
1470 int rc_max_rate;
1471
1472 /**
1473 * minimum bitrate
1474 * - encoding: Set by user.
1475 * - decoding: unused
1476 */
1477 int rc_min_rate;
1478
1479 /**
1480 * decoder bitstream buffer size
1481 * - encoding: Set by user.
1482 * - decoding: unused
1483 */
1484 int rc_buffer_size;
1485 float rc_buffer_aggressivity;
1486
1487 /**
1488 * qscale factor between P and I-frames
1489 * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
1490 * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1491 * - encoding: Set by user.
1492 * - decoding: unused
1493 */
1494 float i_quant_factor;
1495
1496 /**
1497 * qscale offset between P and I-frames
1498 * - encoding: Set by user.
1499 * - decoding: unused
1500 */
1501 float i_quant_offset;
1502
1503 /**
1504 * initial complexity for pass1 ratecontrol
1505 * - encoding: Set by user.
1506 * - decoding: unused
1507 */
1508 float rc_initial_cplx;
1509
1510 /**
1511 * DCT algorithm, see FF_DCT_* below
1512 * - encoding: Set by user.
1513 * - decoding: unused
1514 */
1515 int dct_algo;
1516 #define FF_DCT_AUTO 0
1517 #define FF_DCT_FASTINT 1
1518 #define FF_DCT_INT 2
1519 #define FF_DCT_MMX 3
1520 #define FF_DCT_MLIB 4
1521 #define FF_DCT_ALTIVEC 5
1522 #define FF_DCT_FAAN 6
1523
1524 /**
1525 * luminance masking (0-> disabled)
1526 * - encoding: Set by user.
1527 * - decoding: unused
1528 */
1529 float lumi_masking;
1530
1531 /**
1532 * temporary complexity masking (0-> disabled)
1533 * - encoding: Set by user.
1534 * - decoding: unused
1535 */
1536 float temporal_cplx_masking;
1537
1538 /**
1539 * spatial complexity masking (0-> disabled)
1540 * - encoding: Set by user.
1541 * - decoding: unused
1542 */
1543 float spatial_cplx_masking;
1544
1545 /**
1546 * p block masking (0-> disabled)
1547 * - encoding: Set by user.
1548 * - decoding: unused
1549 */
1550 float p_masking;
1551
1552 /**
1553 * darkness masking (0-> disabled)
1554 * - encoding: Set by user.
1555 * - decoding: unused
1556 */
1557 float dark_masking;
1558
1559 /**
1560 * IDCT algorithm, see FF_IDCT_* below.
1561 * - encoding: Set by user.
1562 * - decoding: Set by user.
1563 */
1564 int idct_algo;
1565 #define FF_IDCT_AUTO 0
1566 #define FF_IDCT_INT 1
1567 #define FF_IDCT_SIMPLE 2
1568 #define FF_IDCT_SIMPLEMMX 3
1569 #define FF_IDCT_LIBMPEG2MMX 4
1570 #define FF_IDCT_PS2 5
1571 #define FF_IDCT_MLIB 6
1572 #define FF_IDCT_ARM 7
1573 #define FF_IDCT_ALTIVEC 8
1574 #define FF_IDCT_SH4 9
1575 #define FF_IDCT_SIMPLEARM 10
1576 #define FF_IDCT_H264 11
1577 #define FF_IDCT_VP3 12
1578 #define FF_IDCT_IPP 13
1579 #define FF_IDCT_XVIDMMX 14
1580 #define FF_IDCT_CAVS 15
1581 #define FF_IDCT_SIMPLEARMV5TE 16
1582 #define FF_IDCT_SIMPLEARMV6 17
1583 #define FF_IDCT_SIMPLEVIS 18
1584 #define FF_IDCT_WMV2 19
1585 #define FF_IDCT_FAAN 20
1586 #define FF_IDCT_EA 21
1587 #define FF_IDCT_SIMPLENEON 22
1588 #define FF_IDCT_SIMPLEALPHA 23
1589 #define FF_IDCT_BINK 24
1590
1591 /**
1592 * slice count
1593 * - encoding: Set by libavcodec.
1594 * - decoding: Set by user (or 0).
1595 */
1596 int slice_count;
1597 /**
1598 * slice offsets in the frame in bytes
1599 * - encoding: Set/allocated by libavcodec.
1600 * - decoding: Set/allocated by user (or NULL).
1601 */
1602 int *slice_offset;
1603
1604 /**
1605 * error concealment flags
1606 * - encoding: unused
1607 * - decoding: Set by user.
1608 */
1609 int error_concealment;
1610 #define FF_EC_GUESS_MVS 1
1611 #define FF_EC_DEBLOCK 2
1612
1613 /**
1614 * dsp_mask could be add used to disable unwanted CPU features
1615 * CPU features (i.e. MMX, SSE. ...)
1616 *
1617 * With the FORCE flag you may instead enable given CPU features.
1618 * (Dangerous: Usable in case of misdetection, improper usage however will
1619 * result into program crash.)
1620 */
1621 unsigned dsp_mask;
1622 #define FF_MM_FORCE 0x80000000 /* Force usage of selected flags (OR) */
1623 /* lower 16 bits - CPU features */
1624 #define FF_MM_MMX 0x0001 ///< standard MMX
1625 #define FF_MM_3DNOW 0x0004 ///< AMD 3DNOW
1626 #if LIBAVCODEC_VERSION_MAJOR < 53
1627 #define FF_MM_MMXEXT 0x0002 ///< SSE integer functions or AMD MMX ext
1628 #endif
1629 #define FF_MM_MMX2 0x0002 ///< SSE integer functions or AMD MMX ext
1630 #define FF_MM_SSE 0x0008 ///< SSE functions
1631 #define FF_MM_SSE2 0x0010 ///< PIV SSE2 functions
1632 #define FF_MM_3DNOWEXT 0x0020 ///< AMD 3DNowExt
1633 #define FF_MM_SSE3 0x0040 ///< Prescott SSE3 functions
1634 #define FF_MM_SSSE3 0x0080 ///< Conroe SSSE3 functions
1635 #define FF_MM_SSE4 0x0100 ///< Penryn SSE4.1 functions
1636 #define FF_MM_SSE42 0x0200 ///< Nehalem SSE4.2 functions
1637 #define FF_MM_IWMMXT 0x0100 ///< XScale IWMMXT
1638 #define FF_MM_ALTIVEC 0x0001 ///< standard AltiVec
1639
1640 /**
1641 * bits per sample/pixel from the demuxer (needed for huffyuv).
1642 * - encoding: Set by libavcodec.
1643 * - decoding: Set by user.
1644 */
1645 int bits_per_coded_sample;
1646
1647 /**
1648 * prediction method (needed for huffyuv)
1649 * - encoding: Set by user.
1650 * - decoding: unused
1651 */
1652 int prediction_method;
1653 #define FF_PRED_LEFT 0
1654 #define FF_PRED_PLANE 1
1655 #define FF_PRED_MEDIAN 2
1656
1657 /**
1658 * sample aspect ratio (0 if unknown)
1659 * That is the width of a pixel divided by the height of the pixel.
1660 * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
1661 * - encoding: Set by user.
1662 * - decoding: Set by libavcodec.
1663 */
1664 AVRational sample_aspect_ratio;
1665
1666 /**
1667 * the picture in the bitstream
1668 * - encoding: Set by libavcodec.
1669 * - decoding: Set by libavcodec.
1670 */
1671 AVFrame *coded_frame;
1672
1673 /**
1674 * debug
1675 * - encoding: Set by user.
1676 * - decoding: Set by user.
1677 */
1678 int debug;
1679 #define FF_DEBUG_PICT_INFO 1
1680 #define FF_DEBUG_RC 2
1681 #define FF_DEBUG_BITSTREAM 4
1682 #define FF_DEBUG_MB_TYPE 8
1683 #define FF_DEBUG_QP 16
1684 #define FF_DEBUG_MV 32
1685 #define FF_DEBUG_DCT_COEFF 0x00000040
1686 #define FF_DEBUG_SKIP 0x00000080
1687 #define FF_DEBUG_STARTCODE 0x00000100
1688 #define FF_DEBUG_PTS 0x00000200
1689 #define FF_DEBUG_ER 0x00000400
1690 #define FF_DEBUG_MMCO 0x00000800
1691 #define FF_DEBUG_BUGS 0x00001000
1692 #define FF_DEBUG_VIS_QP 0x00002000
1693 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1694 #define FF_DEBUG_BUFFERS 0x00008000
1695
1696 /**
1697 * debug
1698 * - encoding: Set by user.
1699 * - decoding: Set by user.
1700 */
1701 int debug_mv;
1702 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1703 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1704 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1705
1706 /**
1707 * error
1708 * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
1709 * - decoding: unused
1710 */
1711 uint64_t error[4];
1712
1713 /**
1714 * minimum MB quantizer
1715 * - encoding: unused
1716 * - decoding: unused
1717 */
1718 int mb_qmin;
1719
1720 /**
1721 * maximum MB quantizer
1722 * - encoding: unused
1723 * - decoding: unused
1724 */
1725 int mb_qmax;
1726
1727 /**
1728 * motion estimation comparison function
1729 * - encoding: Set by user.
1730 * - decoding: unused
1731 */
1732 int me_cmp;
1733 /**
1734 * subpixel motion estimation comparison function
1735 * - encoding: Set by user.
1736 * - decoding: unused
1737 */
1738 int me_sub_cmp;
1739 /**
1740 * macroblock comparison function (not supported yet)
1741 * - encoding: Set by user.
1742 * - decoding: unused
1743 */
1744 int mb_cmp;
1745 /**
1746 * interlaced DCT comparison function
1747 * - encoding: Set by user.
1748 * - decoding: unused
1749 */
1750 int ildct_cmp;
1751 #define FF_CMP_SAD 0
1752 #define FF_CMP_SSE 1
1753 #define FF_CMP_SATD 2
1754 #define FF_CMP_DCT 3
1755 #define FF_CMP_PSNR 4
1756 #define FF_CMP_BIT 5
1757 #define FF_CMP_RD 6
1758 #define FF_CMP_ZERO 7
1759 #define FF_CMP_VSAD 8
1760 #define FF_CMP_VSSE 9
1761 #define FF_CMP_NSSE 10
1762 #define FF_CMP_W53 11
1763 #define FF_CMP_W97 12
1764 #define FF_CMP_DCTMAX 13
1765 #define FF_CMP_DCT264 14
1766 #define FF_CMP_CHROMA 256
1767
1768 /**
1769 * ME diamond size & shape
1770 * - encoding: Set by user.
1771 * - decoding: unused
1772 */
1773 int dia_size;
1774
1775 /**
1776 * amount of previous MV predictors (2a+1 x 2a+1 square)
1777 * - encoding: Set by user.
1778 * - decoding: unused
1779 */
1780 int last_predictor_count;
1781
1782 /**
1783 * prepass for motion estimation
1784 * - encoding: Set by user.
1785 * - decoding: unused
1786 */
1787 int pre_me;
1788
1789 /**
1790 * motion estimation prepass comparison function
1791 * - encoding: Set by user.
1792 * - decoding: unused
1793 */
1794 int me_pre_cmp;
1795
1796 /**
1797 * ME prepass diamond size & shape
1798 * - encoding: Set by user.
1799 * - decoding: unused
1800 */
1801 int pre_dia_size;
1802
1803 /**
1804 * subpel ME quality
1805 * - encoding: Set by user.
1806 * - decoding: unused
1807 */
1808 int me_subpel_quality;
1809
1810 /**
1811 * callback to negotiate the pixelFormat
1812 * @param fmt is the list of formats which are supported by the codec,
1813 * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
1814 * The first is always the native one.
1815 * @return the chosen format
1816 * - encoding: unused
1817 * - decoding: Set by user, if not set the native format will be chosen.
1818 */
1819 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1820
1821 /**
1822 * DTG active format information (additional aspect ratio
1823 * information only used in DVB MPEG-2 transport streams)
1824 * 0 if not set.
1825 *
1826 * - encoding: unused
1827 * - decoding: Set by decoder.
1828 */
1829 int dtg_active_format;
1830 #define FF_DTG_AFD_SAME 8
1831 #define FF_DTG_AFD_4_3 9
1832 #define FF_DTG_AFD_16_9 10
1833 #define FF_DTG_AFD_14_9 11
1834 #define FF_DTG_AFD_4_3_SP_14_9 13
1835 #define FF_DTG_AFD_16_9_SP_14_9 14
1836 #define FF_DTG_AFD_SP_4_3 15
1837
1838 /**
1839 * maximum motion estimation search range in subpel units
1840 * If 0 then no limit.
1841 *
1842 * - encoding: Set by user.
1843 * - decoding: unused
1844 */
1845 int me_range;
1846
1847 /**
1848 * intra quantizer bias
1849 * - encoding: Set by user.
1850 * - decoding: unused
1851 */
1852 int intra_quant_bias;
1853 #define FF_DEFAULT_QUANT_BIAS 999999
1854
1855 /**
1856 * inter quantizer bias
1857 * - encoding: Set by user.
1858 * - decoding: unused
1859 */
1860 int inter_quant_bias;
1861
1862 /**
1863 * color table ID
1864 * - encoding: unused
1865 * - decoding: Which clrtable should be used for 8bit RGB images.
1866 * Tables have to be stored somewhere. FIXME
1867 */
1868 int color_table_id;
1869
1870 /**
1871 * internal_buffer count
1872 * Don't touch, used by libavcodec default_get_buffer().
1873 */
1874 int internal_buffer_count;
1875
1876 /**
1877 * internal_buffers
1878 * Don't touch, used by libavcodec default_get_buffer().
1879 */
1880 void *internal_buffer;
1881
1882 #define FF_LAMBDA_SHIFT 7
1883 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1884 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1885 #define FF_LAMBDA_MAX (256*128-1)
1886
1887 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1888 /**
1889 * Global quality for codecs which cannot change it per frame.
1890 * This should be proportional to MPEG-1/2/4 qscale.
1891 * - encoding: Set by user.
1892 * - decoding: unused
1893 */
1894 int global_quality;
1895
1896 #define FF_CODER_TYPE_VLC 0
1897 #define FF_CODER_TYPE_AC 1
1898 #define FF_CODER_TYPE_RAW 2
1899 #define FF_CODER_TYPE_RLE 3
1900 #define FF_CODER_TYPE_DEFLATE 4
1901 /**
1902 * coder type
1903 * - encoding: Set by user.
1904 * - decoding: unused
1905 */
1906 int coder_type;
1907
1908 /**
1909 * context model
1910 * - encoding: Set by user.
1911 * - decoding: unused
1912 */
1913 int context_model;
1914 #if 0
1915 /**
1916 *
1917 * - encoding: unused
1918 * - decoding: Set by user.
1919 */
1920 uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1921 #endif
1922
1923 /**
1924 * slice flags
1925 * - encoding: unused
1926 * - decoding: Set by user.
1927 */
1928 int slice_flags;
1929 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1930 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1931 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1932
1933 /**
1934 * XVideo Motion Acceleration
1935 * - encoding: forbidden
1936 * - decoding: set by decoder
1937 */
1938 int xvmc_acceleration;
1939
1940 /**
1941 * macroblock decision mode
1942 * - encoding: Set by user.
1943 * - decoding: unused
1944 */
1945 int mb_decision;
1946 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1947 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1948 #define FF_MB_DECISION_RD 2 ///< rate distortion
1949
1950 /**
1951 * custom intra quantization matrix
1952 * - encoding: Set by user, can be NULL.
1953 * - decoding: Set by libavcodec.
1954 */
1955 uint16_t *intra_matrix;
1956
1957 /**
1958 * custom inter quantization matrix
1959 * - encoding: Set by user, can be NULL.
1960 * - decoding: Set by libavcodec.
1961 */
1962 uint16_t *inter_matrix;
1963
1964 /**
1965 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1966 * This is used to work around some encoder bugs.
1967 * - encoding: unused
1968 * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1969 */
1970 unsigned int stream_codec_tag;
1971
1972 /**
1973 * scene change detection threshold
1974 * 0 is default, larger means fewer detected scene changes.
1975 * - encoding: Set by user.
1976 * - decoding: unused
1977 */
1978 int scenechange_threshold;
1979
1980 /**
1981 * minimum Lagrange multipler
1982 * - encoding: Set by user.
1983 * - decoding: unused
1984 */
1985 int lmin;
1986
1987 /**
1988 * maximum Lagrange multipler
1989 * - encoding: Set by user.
1990 * - decoding: unused
1991 */
1992 int lmax;
1993
1994 /**
1995 * palette control structure
1996 * - encoding: ??? (no palette-enabled encoder yet)
1997 * - decoding: Set by user.
1998 */
1999 struct AVPaletteControl *palctrl;
2000
2001 /**
2002 * noise reduction strength
2003 * - encoding: Set by user.
2004 * - decoding: unused
2005 */
2006 int noise_reduction;
2007
2008 /**
2009 * Called at the beginning of a frame to get cr buffer for it.
2010 * Buffer type (size, hints) must be the same. libavcodec won't check it.
2011 * libavcodec will pass previous buffer in pic, function should return
2012 * same buffer or new buffer with old frame "painted" into it.
2013 * If pic.data[0] == NULL must behave like get_buffer().
2014 * if CODEC_CAP_DR1 is not set then reget_buffer() must call
2015 * avcodec_default_reget_buffer() instead of providing buffers allocated by
2016 * some other means.
2017 * - encoding: unused
2018 * - decoding: Set by libavcodec., user can override
2019 */
2020 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
2021
2022 /**
2023 * Number of bits which should be loaded into the rc buffer before decoding starts.
2024 * - encoding: Set by user.
2025 * - decoding: unused
2026 */
2027 int rc_initial_buffer_occupancy;
2028
2029 /**
2030 *
2031 * - encoding: Set by user.
2032 * - decoding: unused
2033 */
2034 int inter_threshold;
2035
2036 /**
2037 * CODEC_FLAG2_*
2038 * - encoding: Set by user.
2039 * - decoding: Set by user.
2040 */
2041 int flags2;
2042
2043 /**
2044 * Simulates errors in the bitstream to test error concealment.
2045 * - encoding: Set by user.
2046 * - decoding: unused
2047 */
2048 int error_rate;
2049
2050 /**
2051 * MP3 antialias algorithm, see FF_AA_* below.
2052 * - encoding: unused
2053 * - decoding: Set by user.
2054 */
2055 int antialias_algo;
2056 #define FF_AA_AUTO 0
2057 #define FF_AA_FASTINT 1 //not implemented yet
2058 #define FF_AA_INT 2
2059 #define FF_AA_FLOAT 3
2060 /**
2061 * quantizer noise shaping
2062 * - encoding: Set by user.
2063 * - decoding: unused
2064 */
2065 int quantizer_noise_shaping;
2066
2067 /**
2068 * thread count
2069 * is used to decide how many independent tasks should be passed to execute()
2070 * - encoding: Set by user.
2071 * - decoding: Set by user.
2072 */
2073 int thread_count;
2074
2075 /**
2076 * The codec may call this to execute several independent things.
2077 * It will return only after finishing all tasks.
2078 * The user may replace this with some multithreaded implementation,
2079 * the default implementation will execute the parts serially.
2080 * @param count the number of things to execute
2081 * - encoding: Set by libavcodec, user can override.
2082 * - decoding: Set by libavcodec, user can override.
2083 */
2084 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size);
2085
2086 /**
2087 * thread opaque
2088 * Can be used by execute() to store some per AVCodecContext stuff.
2089 * - encoding: set by execute()
2090 * - decoding: set by execute()
2091 */
2092 void *thread_opaque;
2093
2094 /**
2095 * Motion estimation threshold below which no motion estimation is
2096 * performed, but instead the user specified motion vectors are used.
2097 *
2098 * - encoding: Set by user.
2099 * - decoding: unused
2100 */
2101 int me_threshold;
2102
2103 /**
2104 * Macroblock threshold below which the user specified macroblock types will be used.
2105 * - encoding: Set by user.
2106 * - decoding: unused
2107 */
2108 int mb_threshold;
2109
2110 /**
2111 * precision of the intra DC coefficient - 8
2112 * - encoding: Set by user.
2113 * - decoding: unused
2114 */
2115 int intra_dc_precision;
2116
2117 /**
2118 * noise vs. sse weight for the nsse comparsion function
2119 * - encoding: Set by user.
2120 * - decoding: unused
2121 */
2122 int nsse_weight;
2123
2124 /**
2125 * Number of macroblock rows at the top which are skipped.
2126 * - encoding: unused
2127 * - decoding: Set by user.
2128 */
2129 int skip_top;
2130
2131 /**
2132 * Number of macroblock rows at the bottom which are skipped.
2133 * - encoding: unused
2134 * - decoding: Set by user.
2135 */
2136 int skip_bottom;
2137
2138 /**
2139 * profile
2140 * - encoding: Set by user.
2141 * - decoding: Set by libavcodec.
2142 */
2143 int profile;
2144 #define FF_PROFILE_UNKNOWN -99
2145
2146 #define FF_PROFILE_AAC_MAIN 0
2147 #define FF_PROFILE_AAC_LOW 1
2148 #define FF_PROFILE_AAC_SSR 2
2149 #define FF_PROFILE_AAC_LTP 3
2150
2151 #define FF_PROFILE_H264_BASELINE 66
2152 #define FF_PROFILE_H264_MAIN 77
2153 #define FF_PROFILE_H264_EXTENDED 88
2154 #define FF_PROFILE_H264_HIGH 100
2155 #define FF_PROFILE_H264_HIGH_10 110
2156 #define FF_PROFILE_H264_HIGH_422 122
2157 #define FF_PROFILE_H264_HIGH_444 244
2158 #define FF_PROFILE_H264_CAVLC_444 44
2159
2160 /**
2161 * level
2162 * - encoding: Set by user.
2163 * - decoding: Set by libavcodec.
2164 */
2165 int level;
2166 #define FF_LEVEL_UNKNOWN -99
2167
2168 /**
2169 * low resolution decoding, 1-> 1/2 size, 2->1/4 size
2170 * - encoding: unused
2171 * - decoding: Set by user.
2172 */
2173 int lowres;
2174
2175 /**
2176 * Bitstream width / height, may be different from width/height if lowres
2177 * or other things are used.
2178 * - encoding: unused
2179 * - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
2180 */
2181 int coded_width, coded_height;
2182
2183 /**
2184 * frame skip threshold
2185 * - encoding: Set by user.
2186 * - decoding: unused
2187 */
2188 int frame_skip_threshold;
2189
2190 /**
2191 * frame skip factor
2192 * - encoding: Set by user.
2193 * - decoding: unused
2194 */
2195 int frame_skip_factor;
2196
2197 /**
2198 * frame skip exponent
2199 * - encoding: Set by user.
2200 * - decoding: unused
2201 */
2202 int frame_skip_exp;
2203
2204 /**
2205 * frame skip comparison function
2206 * - encoding: Set by user.
2207 * - decoding: unused
2208 */
2209 int frame_skip_cmp;
2210
2211 /**
2212 * Border processing masking, raises the quantizer for mbs on the borders
2213 * of the picture.
2214 * - encoding: Set by user.
2215 * - decoding: unused
2216 */
2217 float border_masking;
2218
2219 /**
2220 * minimum MB lagrange multipler
2221 * - encoding: Set by user.
2222 * - decoding: unused
2223 */
2224 int mb_lmin;
2225
2226 /**
2227 * maximum MB lagrange multipler
2228 * - encoding: Set by user.
2229 * - decoding: unused
2230 */
2231 int mb_lmax;
2232
2233 /**
2234 *
2235 * - encoding: Set by user.
2236 * - decoding: unused
2237 */
2238 int me_penalty_compensation;
2239
2240 /**
2241 *
2242 * - encoding: unused
2243 * - decoding: Set by user.
2244 */
2245 enum AVDiscard skip_loop_filter;
2246
2247 /**
2248 *
2249 * - encoding: unused
2250 * - decoding: Set by user.
2251 */
2252 enum AVDiscard skip_idct;
2253
2254 /**
2255 *
2256 * - encoding: unused
2257 * - decoding: Set by user.
2258 */
2259 enum AVDiscard skip_frame;
2260
2261 /**
2262 *
2263 * - encoding: Set by user.
2264 * - decoding: unused
2265 */
2266 int bidir_refine;
2267
2268 /**
2269 *
2270 * - encoding: Set by user.
2271 * - decoding: unused
2272 */
2273 int brd_scale;
2274
2275 /**
2276 * constant rate factor - quality-based VBR - values ~correspond to qps
2277 * - encoding: Set by user.
2278 * - decoding: unused
2279 */
2280 float crf;
2281
2282 /**
2283 * constant quantization parameter rate control method
2284 * - encoding: Set by user.
2285 * - decoding: unused
2286 */
2287 int cqp;
2288
2289 /**
2290 * minimum GOP size
2291 * - encoding: Set by user.
2292 * - decoding: unused
2293 */
2294 int keyint_min;
2295
2296 /**
2297 * number of reference frames
2298 * - encoding: Set by user.
2299 * - decoding: Set by lavc.
2300 */
2301 int refs;
2302
2303 /**
2304 * chroma qp offset from luma
2305 * - encoding: Set by user.
2306 * - decoding: unused
2307 */
2308 int chromaoffset;
2309
2310 /**
2311 * Influences how often B-frames are used.
2312 * - encoding: Set by user.
2313 * - decoding: unused
2314 */
2315 int bframebias;
2316
2317 /**
2318 * trellis RD quantization
2319 * - encoding: Set by user.
2320 * - decoding: unused
2321 */
2322 int trellis;
2323
2324 /**
2325 * Reduce fluctuations in qp (before curve compression).
2326 * - encoding: Set by user.
2327 * - decoding: unused
2328 */
2329 float complexityblur;
2330
2331 /**
2332 * in-loop deblocking filter alphac0 parameter
2333 * alpha is in the range -6...6
2334 * - encoding: Set by user.
2335 * - decoding: unused
2336 */
2337 int deblockalpha;
2338
2339 /**
2340 * in-loop deblocking filter beta parameter
2341 * beta is in the range -6...6
2342 * - encoding: Set by user.
2343 * - decoding: unused
2344 */
2345 int deblockbeta;
2346
2347 /**
2348 * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
2349 * - encoding: Set by user.
2350 * - decoding: unused
2351 */
2352 int partitions;
2353 #define X264_PART_I4X4 0x001 /* Analyze i4x4 */
2354 #define X264_PART_I8X8 0x002 /* Analyze i8x8 (requires 8x8 transform) */
2355 #define X264_PART_P8X8 0x010 /* Analyze p16x8, p8x16 and p8x8 */
2356 #define X264_PART_P4X4 0x020 /* Analyze p8x4, p4x8, p4x4 */
2357 #define X264_PART_B8X8 0x100 /* Analyze b16x8, b8x16 and b8x8 */
2358
2359 /**
2360 * direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal), 3 (auto)
2361 * - encoding: Set by user.
2362 * - decoding: unused
2363 */
2364 int directpred;
2365
2366 /**
2367 * Audio cutoff bandwidth (0 means "automatic")
2368 * - encoding: Set by user.
2369 * - decoding: unused
2370 */
2371 int cutoff;
2372
2373 /**
2374 * Multiplied by qscale for each frame and added to scene_change_score.
2375 * - encoding: Set by user.
2376 * - decoding: unused
2377 */
2378 int scenechange_factor;
2379
2380 /**
2381 *
2382 * Note: Value depends upon the compare function used for fullpel ME.
2383 * - encoding: Set by user.
2384 * - decoding: unused
2385 */
2386 int mv0_threshold;
2387
2388 /**
2389 * Adjusts sensitivity of b_frame_strategy 1.
2390 * - encoding: Set by user.
2391 * - decoding: unused
2392 */
2393 int b_sensitivity;
2394
2395 /**
2396 * - encoding: Set by user.
2397 * - decoding: unused
2398 */
2399 int compression_level;
2400 #define FF_COMPRESSION_DEFAULT -1
2401
2402 /**
2403 * Sets whether to use LPC mode - used by FLAC encoder.
2404 * - encoding: Set by user.
2405 * - decoding: unused
2406 */
2407 int use_lpc;
2408
2409 /**
2410 * LPC coefficient precision - used by FLAC encoder
2411 * - encoding: Set by user.
2412 * - decoding: unused
2413 */
2414 int lpc_coeff_precision;
2415
2416 /**
2417 * - encoding: Set by user.
2418 * - decoding: unused
2419 */
2420 int min_prediction_order;
2421
2422 /**
2423 * - encoding: Set by user.
2424 * - decoding: unused
2425 */
2426 int max_prediction_order;
2427
2428 /**
2429 * search method for selecting prediction order
2430 * - encoding: Set by user.
2431 * - decoding: unused
2432 */
2433 int prediction_order_method;
2434
2435 /**
2436 * - encoding: Set by user.
2437 * - decoding: unused
2438 */
2439 int min_partition_order;
2440
2441 /**
2442 * - encoding: Set by user.
2443 * - decoding: unused
2444 */
2445 int max_partition_order;
2446
2447 /**
2448 * GOP timecode frame start number, in non drop frame format
2449 * - encoding: Set by user.
2450 * - decoding: unused
2451 */
2452 int64_t timecode_frame_start;
2453
2454 #if LIBAVCODEC_VERSION_MAJOR < 53
2455 /**
2456 * Decoder should decode to this many channels if it can (0 for default)
2457 * - encoding: unused
2458 * - decoding: Set by user.
2459 * @deprecated Deprecated in favor of request_channel_layout.
2460 */
2461 int request_channels;
2462 #endif
2463
2464 /**
2465 * Percentage of dynamic range compression to be applied by the decoder.
2466 * The default value is 1.0, corresponding to full compression.
2467 * - encoding: unused
2468 * - decoding: Set by user.
2469 */
2470 float drc_scale;
2471
2472 /**
2473 * opaque 64bit number (generally a PTS) that will be reordered and
2474 * output in AVFrame.reordered_opaque
2475 * - encoding: unused
2476 * - decoding: Set by user.
2477 */
2478 int64_t reordered_opaque;
2479
2480 /**
2481 * Bits per sample/pixel of internal libavcodec pixel/sample format.
2482 * This field is applicable only when sample_fmt is SAMPLE_FMT_S32.
2483 * - encoding: set by user.
2484 * - decoding: set by libavcodec.
2485 */
2486 int bits_per_raw_sample;
2487
2488 /**
2489 * Audio channel layout.
2490 * - encoding: set by user.
2491 * - decoding: set by libavcodec.
2492 */
2493 int64_t channel_layout;
2494
2495 /**
2496 * Request decoder to use this channel layout if it can (0 for default)
2497 * - encoding: unused
2498 * - decoding: Set by user.
2499 */
2500 int64_t request_channel_layout;
2501
2502 /**
2503 * Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow.
2504 * - encoding: Set by user.
2505 * - decoding: unused.
2506 */
2507 float rc_max_available_vbv_use;
2508
2509 /**
2510 * Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow.
2511 * - encoding: Set by user.
2512 * - decoding: unused.
2513 */
2514 float rc_min_vbv_overflow_use;
2515
2516 /**
2517 * Hardware accelerator in use
2518 * - encoding: unused.
2519 * - decoding: Set by libavcodec
2520 */
2521 struct AVHWAccel *hwaccel;
2522
2523 /**
2524 * For some codecs, the time base is closer to the field rate than the frame rate.
2525 * Most notably, H.264 and MPEG-2 specify time_base as half of frame duration
2526 * if no telecine is used ...
2527 *
2528 * Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2.
2529 */
2530 int ticks_per_frame;
2531
2532 /**
2533 * Hardware accelerator context.
2534 * For some hardware accelerators, a global context needs to be
2535 * provided by the user. In that case, this holds display-dependent
2536 * data FFmpeg cannot instantiate itself. Please refer to the
2537 * FFmpeg HW accelerator documentation to know how to fill this
2538 * is. e.g. for VA API, this is a struct vaapi_context.
2539 * - encoding: unused
2540 * - decoding: Set by user
2541 */
2542 void *hwaccel_context;
2543
2544 /**
2545 * Chromaticity coordinates of the source primaries.
2546 * - encoding: Set by user
2547 * - decoding: Set by libavcodec
2548 */
2549 enum AVColorPrimaries color_primaries;
2550
2551 /**
2552 * Color Transfer Characteristic.
2553 * - encoding: Set by user
2554 * - decoding: Set by libavcodec
2555 */
2556 enum AVColorTransferCharacteristic color_trc;
2557
2558 /**
2559 * YUV colorspace type.
2560 * - encoding: Set by user
2561 * - decoding: Set by libavcodec
2562 */
2563 enum AVColorSpace colorspace;
2564
2565 /**
2566 * MPEG vs JPEG YUV range.
2567 * - encoding: Set by user
2568 * - decoding: Set by libavcodec
2569 */
2570 enum AVColorRange color_range;
2571
2572 /**
2573 * This defines the location of chroma samples.
2574 * - encoding: Set by user
2575 * - decoding: Set by libavcodec
2576 */
2577 enum AVChromaLocation chroma_sample_location;
2578
2579 /**
2580 * The codec may call this to execute several independent things.
2581 * It will return only after finishing all tasks.
2582 * The user may replace this with some multithreaded implementation,
2583 * the default implementation will execute the parts serially.
2584 * Also see avcodec_thread_init and e.g. the --enable-pthread configure option.
2585 * @param c context passed also to func
2586 * @param count the number of things to execute
2587 * @param arg2 argument passed unchanged to func
2588 * @param ret return values of executed functions, must have space for "count" values. May be NULL.
2589 * @param func function that will be called count times, with jobnr from 0 to count-1.
2590 * threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no
2591 * two instances of func executing at the same time will have the same threadnr.
2592 * @return always 0 currently, but code should handle a future improvement where when any call to func
2593 * returns < 0 no further calls to func may be done and < 0 is returned.
2594 * - encoding: Set by libavcodec, user can override.
2595 * - decoding: Set by libavcodec, user can override.
2596 */
2597 int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count);
2598
2599 /**
2600 * explicit P-frame weighted prediction analysis method
2601 * 0: off
2602 * 1: fast blind weighting (one reference duplicate with -1 offset)
2603 * 2: smart weighting (full fade detection analysis)
2604 * - encoding: Set by user.
2605 * - decoding: unused
2606 */
2607 int weighted_p_pred;
2608
2609 /**
2610 * AQ mode
2611 * 0: Disabled
2612 * 1: Variance AQ (complexity mask)
2613 * 2: Auto-variance AQ (experimental)
2614 * - encoding: Set by user
2615 * - decoding: unused
2616 */
2617 int aq_mode;
2618
2619 /**
2620 * AQ strength
2621 * Reduces blocking and blurring in flat and textured areas.
2622 * - encoding: Set by user
2623 * - decoding: unused
2624 */
2625 float aq_strength;
2626
2627 /**
2628 * PSY RD
2629 * Strength of psychovisual optimization
2630 * - encoding: Set by user
2631 * - decoding: unused
2632 */
2633 float psy_rd;
2634
2635 /**
2636 * PSY trellis
2637 * Strength of psychovisual optimization
2638 * - encoding: Set by user
2639 * - decoding: unused
2640 */
2641 float psy_trellis;
2642
2643 /**
2644 * RC lookahead
2645 * Number of frames for frametype and ratecontrol lookahead
2646 * - encoding: Set by user
2647 * - decoding: unused
2648 */
2649 int rc_lookahead;
2650
2651 /**
2652 * Constant rate factor maximum
2653 * With CRF encoding mode and VBV restrictions enabled, prevents quality from being worse
2654 * than crf_max, even if doing so would violate VBV restrictions.
2655 * - encoding: Set by user.
2656 * - decoding: unused
2657 */
2658 float crf_max;
2659
2660 int log_level_offset;
2661 } AVCodecContext;
2662
2663 /**
2664 * AVCodec.
2665 */
2666 typedef struct AVCodec {
2667 /**
2668 * Name of the codec implementation.
2669 * The name is globally unique among encoders and among decoders (but an
2670 * encoder and a decoder can share the same name).
2671 * This is the primary way to find a codec from the user perspective.
2672 */
2673 const char *name;
2674 enum AVMediaType type;
2675 enum CodecID id;
2676 int priv_data_size;
2677 int (*init)(AVCodecContext *);
2678 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2679 int (*close)(AVCodecContext *);
2680 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt);
2681 /**
2682 * Codec capabilities.
2683 * see CODEC_CAP_*
2684 */
2685 int capabilities;
2686 struct AVCodec *next;
2687 /**
2688 * Flush buffers.
2689 * Will be called when seeking
2690 */
2691 void (*flush)(AVCodecContext *);
2692 const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0}
2693 const enum PixelFormat *pix_fmts; ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1
2694 /**
2695 * Descriptive name for the codec, meant to be more human readable than name.
2696 * You should use the NULL_IF_CONFIG_SMALL() macro to define it.
2697 */
2698 const char *long_name;
2699 const int *supported_samplerates; ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
2700 const enum SampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1
2701 const int64_t *channel_layouts; ///< array of support channel layouts, or NULL if unknown. array is terminated by 0
2702 } AVCodec;
2703
2704 /**
2705 * AVHWAccel.
2706 */
2707 typedef struct AVHWAccel {
2708 /**
2709 * Name of the hardware accelerated codec.
2710 * The name is globally unique among encoders and among decoders (but an
2711 * encoder and a decoder can share the same name).
2712 */
2713 const char *name;
2714
2715 /**
2716 * Type of codec implemented by the hardware accelerator.
2717 *
2718 * See AVMEDIA_TYPE_xxx
2719 */
2720 enum AVMediaType type;
2721
2722 /**
2723 * Codec implemented by the hardware accelerator.
2724 *
2725 * See CODEC_ID_xxx
2726 */
2727 enum CodecID id;
2728
2729 /**
2730 * Supported pixel format.
2731 *
2732 * Only hardware accelerated formats are supported here.
2733 */
2734 enum PixelFormat pix_fmt;
2735
2736 /**
2737 * Hardware accelerated codec capabilities.
2738 * see FF_HWACCEL_CODEC_CAP_*
2739 */
2740 int capabilities;
2741
2742 struct AVHWAccel *next;
2743
2744 /**
2745 * Called at the beginning of each frame or field picture.
2746 *
2747 * Meaningful frame information (codec specific) is guaranteed to
2748 * be parsed at this point. This function is mandatory.
2749 *
2750 * Note that buf can be NULL along with buf_size set to 0.
2751 * Otherwise, this means the whole frame is available at this point.
2752 *
2753 * @param avctx the codec context
2754 * @param buf the frame data buffer base
2755 * @param buf_size the size of the frame in bytes
2756 * @return zero if successful, a negative value otherwise
2757 */
2758 int (*start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
2759
2760 /**
2761 * Callback for each slice.
2762 *
2763 * Meaningful slice information (codec specific) is guaranteed to
2764 * be parsed at this point. This function is mandatory.
2765 *
2766 * @param avctx the codec context
2767 * @param buf the slice data buffer base
2768 * @param buf_size the size of the slice in bytes
2769 * @return zero if successful, a negative value otherwise
2770 */
2771 int (*decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
2772
2773 /**
2774 * Called at the end of each frame or field picture.
2775 *
2776 * The whole picture is parsed at this point and can now be sent
2777 * to the hardware accelerator. This function is mandatory.
2778 *
2779 * @param avctx the codec context
2780 * @return zero if successful, a negative value otherwise
2781 */
2782 int (*end_frame)(AVCodecContext *avctx);
2783
2784 /**
2785 * Size of HW accelerator private data.
2786 *
2787 * Private data is allocated with av_mallocz() before
2788 * AVCodecContext.get_buffer() and deallocated after
2789 * AVCodecContext.release_buffer().
2790 */
2791 int priv_data_size;
2792 } AVHWAccel;
2793
2794 /**
2795 * four components are given, that's all.
2796 * the last component is alpha
2797 */
2798 typedef struct AVPicture {
2799 uint8_t *data[4];
2800 int linesize[4]; ///< number of bytes per line
2801 } AVPicture;
2802
2803 #if LIBAVCODEC_VERSION_MAJOR < 53
2804 /**
2805 * AVPaletteControl
2806 * This structure defines a method for communicating palette changes
2807 * between and demuxer and a decoder.
2808 *
2809 * @deprecated Use AVPacket to send palette changes instead.
2810 * This is totally broken.
2811 */
2812 #define AVPALETTE_SIZE 1024
2813 #define AVPALETTE_COUNT 256
2814 typedef struct AVPaletteControl {
2815
2816 /* Demuxer sets this to 1 to indicate the palette has changed;
2817 * decoder resets to 0. */
2818 int palette_changed;
2819
2820 /* 4-byte ARGB palette entries, stored in native byte order; note that
2821 * the individual palette components should be on a 8-bit scale; if
2822 * the palette data comes from an IBM VGA native format, the component
2823 * data is probably 6 bits in size and needs to be scaled. */
2824 unsigned int palette[AVPALETTE_COUNT];
2825
2826 } AVPaletteControl attribute_deprecated;
2827 #endif
2828
2829 enum AVSubtitleType {
2830 SUBTITLE_NONE,
2831
2832 SUBTITLE_BITMAP, ///< A bitmap, pict will be set
2833
2834 /**
2835 * Plain text, the text field must be set by the decoder and is
2836 * authoritative. ass and pict fields may contain approximations.
2837 */
2838 SUBTITLE_TEXT,
2839
2840 /**
2841 * Formatted text, the ass field must be set by the decoder and is
2842 * authoritative. pict and text fields may contain approximations.
2843 */
2844 SUBTITLE_ASS,
2845 };
2846
2847 typedef struct AVSubtitleRect {
2848 int x; ///< top left corner of pict, undefined when pict is not set
2849 int y; ///< top left corner of pict, undefined when pict is not set
2850 int w; ///< width of pict, undefined when pict is not set
2851 int h; ///< height of pict, undefined when pict is not set
2852 int nb_colors; ///< number of colors in pict, undefined when pict is not set
2853
2854 /**
2855 * data+linesize for the bitmap of this subtitle.
2856 * can be set for text/ass as well once they where rendered
2857 */
2858 AVPicture pict;
2859 enum AVSubtitleType type;
2860
2861 char *text; ///< 0 terminated plain UTF-8 text
2862
2863 /**
2864 * 0 terminated ASS/SSA compatible event line.
2865 * The pressentation of this is unaffected by the other values in this
2866 * struct.
2867 */
2868 char *ass;
2869 } AVSubtitleRect;
2870
2871 typedef struct AVSubtitle {
2872 uint16_t format; /* 0 = graphics */
2873 uint32_t start_display_time; /* relative to packet pts, in ms */
2874 uint32_t end_display_time; /* relative to packet pts, in ms */
2875 unsigned num_rects;
2876 AVSubtitleRect **rects;
2877 int64_t pts; ///< Same as packet pts, in AV_TIME_BASE
2878 } AVSubtitle;
2879
2880 /* packet functions */
2881
2882 /**
2883 * @deprecated use NULL instead
2884 */
2885 attribute_deprecated void av_destruct_packet_nofree(AVPacket *pkt);
2886
2887 /**
2888 * Default packet destructor.
2889 */
2890 void av_destruct_packet(AVPacket *pkt);
2891
2892 /**
2893 * Initialize optional fields of a packet with default values.
2894 *
2895 * @param pkt packet
2896 */
2897 void av_init_packet(AVPacket *pkt);
2898
2899 /**
2900 * Allocate the payload of a packet and initialize its fields with
2901 * default values.
2902 *
2903 * @param pkt packet
2904 * @param size wanted payload size
2905 * @return 0 if OK, AVERROR_xxx otherwise
2906 */
2907 int av_new_packet(AVPacket *pkt, int size);
2908
2909 /**
2910 * Reduce packet size, correctly zeroing padding
2911 *
2912 * @param pkt packet
2913 * @param size new size
2914 */
2915 void av_shrink_packet(AVPacket *pkt, int size);
2916
2917 /**
2918 * @warning This is a hack - the packet memory allocation stuff is broken. The
2919 * packet is allocated if it was not really allocated.
2920 */
2921 int av_dup_packet(AVPacket *pkt);
2922
2923 /**
2924 * Free a packet.
2925 *
2926 * @param pkt packet to free
2927 */
2928 void av_free_packet(AVPacket *pkt);
2929
2930 /* resample.c */
2931
2932 struct ReSampleContext;
2933 struct AVResampleContext;
2934
2935 typedef struct ReSampleContext ReSampleContext;
2936
2937 #if LIBAVCODEC_VERSION_MAJOR < 53
2938 /**
2939 * @deprecated Use av_audio_resample_init() instead.
2940 */
2941 attribute_deprecated ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2942 int output_rate, int input_rate);
2943 #endif
2944 /**
2945 * Initializes audio resampling context
2946 *
2947 * @param output_channels number of output channels
2948 * @param input_channels number of input channels
2949 * @param output_rate output sample rate
2950 * @param input_rate input sample rate
2951 * @param sample_fmt_out requested output sample format
2952 * @param sample_fmt_in input sample format
2953 * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
2954 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
2955 * @param linear If 1 then the used FIR filter will be linearly interpolated
2956 between the 2 closest, if 0 the closest will be used
2957 * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
2958 * @return allocated ReSampleContext, NULL if error occured
2959 */
2960 ReSampleContext *av_audio_resample_init(int output_channels, int input_channels,
2961 int output_rate, int input_rate,
2962 enum SampleFormat sample_fmt_out,
2963 enum SampleFormat sample_fmt_in,
2964 int filter_length, int log2_phase_count,
2965 int linear, double cutoff);
2966
2967 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2968 void audio_resample_close(ReSampleContext *s);
2969
2970
2971 /**
2972 * Initializes an audio resampler.
2973 * Note, if either rate is not an integer then simply scale both rates up so they are.
2974 * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
2975 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
2976 * @param linear If 1 then the used FIR filter will be linearly interpolated
2977 between the 2 closest, if 0 the closest will be used
2978 * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
2979 */
2980 struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2981
2982 /**
2983 * resamples.
2984 * @param src an array of unconsumed samples
2985 * @param consumed the number of samples of src which have been consumed are returned here
2986 * @param src_size the number of unconsumed samples available
2987 * @param dst_size the amount of space in samples available in dst
2988 * @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.
2989 * @return the number of samples written in dst or -1 if an error occurred
2990 */
2991 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2992
2993
2994 /**
2995 * Compensates samplerate/timestamp drift. The compensation is done by changing
2996 * the resampler parameters, so no audible clicks or similar distortions occur
2997 * @param compensation_distance distance in output samples over which the compensation should be performed
2998 * @param sample_delta number of output samples which should be output less
2999 *
3000 * example: av_resample_compensate(c, 10, 500)
3001 * here instead of 510 samples only 500 samples would be output
3002 *
3003 * note, due to rounding the actual compensation might be slightly different,
3004 * especially if the compensation_distance is large and the in_rate used during init is small
3005 */
3006 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
3007 void av_resample_close(struct AVResampleContext *c);
3008
3009 /**
3010 * Allocate memory for a picture. Call avpicture_free to free it.
3011 *
3012 * @param picture the picture to be filled in
3013 * @param pix_fmt the format of the picture
3014 * @param width the width of the picture
3015 * @param height the height of the picture
3016 * @return zero if successful, a negative value if not
3017 */
3018 int avpicture_alloc(AVPicture *picture, enum PixelFormat pix_fmt, int width, int height);
3019
3020 /**
3021 * Free a picture previously allocated by avpicture_alloc().
3022 *
3023 * @param picture the AVPicture to be freed
3024 */
3025 void avpicture_free(AVPicture *picture);
3026
3027 /**
3028 * Fill in the AVPicture fields.
3029 * The fields of the given AVPicture are filled in by using the 'ptr' address
3030 * which points to the image data buffer. Depending on the specified picture
3031 * format, one or multiple image data pointers and line sizes will be set.
3032 * If a planar format is specified, several pointers will be set pointing to
3033 * the different picture planes and the line sizes of the different planes
3034 * will be stored in the lines_sizes array.
3035 * Call with ptr == NULL to get the required size for the ptr buffer.
3036 *
3037 * @param picture AVPicture whose fields are to be filled in
3038 * @param ptr Buffer which will contain or contains the actual image data
3039 * @param pix_fmt The format in which the picture data is stored.
3040 * @param width the width of the image in pixels
3041 * @param height the height of the image in pixels
3042 * @return size of the image data in bytes
3043 */
3044 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
3045 enum PixelFormat pix_fmt, int width, int height);
3046 int avpicture_layout(const AVPicture* src, enum PixelFormat pix_fmt, int width, int height,
3047 unsigned char *dest, int dest_size);
3048
3049 /**
3050 * Calculate the size in bytes that a picture of the given width and height
3051 * would occupy if stored in the given picture format.
3052 * Note that this returns the size of a compact representation as generated
3053 * by avpicture_layout, which can be smaller than the size required for e.g.
3054 * avpicture_fill.
3055 *
3056 * @param pix_fmt the given picture format
3057 * @param width the width of the image
3058 * @param height the height of the image
3059 * @return Image data size in bytes or -1 on error (e.g. too large dimensions).
3060 */
3061 int avpicture_get_size(enum PixelFormat pix_fmt, int width, int height);
3062 void avcodec_get_chroma_sub_sample(enum PixelFormat pix_fmt, int *h_shift, int *v_shift);
3063 const char *avcodec_get_pix_fmt_name(enum PixelFormat pix_fmt);
3064 void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
3065
3066 #if LIBAVCODEC_VERSION_MAJOR < 53
3067 /**
3068 * Returns the pixel format corresponding to the name name.
3069 *
3070 * If there is no pixel format with name name, then looks for a
3071 * pixel format with the name corresponding to the native endian
3072 * format of name.
3073 * For example in a little-endian system, first looks for "gray16",
3074 * then for "gray16le".
3075 *
3076 * Finally if no pixel format has been found, returns PIX_FMT_NONE.
3077 *
3078 * @deprecated Deprecated in favor of av_get_pix_fmt().
3079 */
3080 attribute_deprecated enum PixelFormat avcodec_get_pix_fmt(const char* name);
3081 #endif
3082
3083 /**
3084 * Returns a value representing the fourCC code associated to the
3085 * pixel format pix_fmt, or 0 if no associated fourCC code can be
3086 * found.
3087 */
3088 unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat pix_fmt);
3089
3090 #define FF_LOSS_RESOLUTION 0x0001 /**< loss due to resolution change */
3091 #define FF_LOSS_DEPTH 0x0002 /**< loss due to color depth change */
3092 #define FF_LOSS_COLORSPACE 0x0004 /**< loss due to color space conversion */
3093 #define FF_LOSS_ALPHA 0x0008 /**< loss of alpha bits */
3094 #define FF_LOSS_COLORQUANT 0x0010 /**< loss due to color quantization */
3095 #define FF_LOSS_CHROMA 0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
3096
3097 /**
3098 * Computes what kind of losses will occur when converting from one specific
3099 * pixel format to another.
3100 * When converting from one pixel format to another, information loss may occur.
3101 * For example, when converting from RGB24 to GRAY, the color information will
3102 * be lost. Similarly, other losses occur when converting from some formats to
3103 * other formats. These losses can involve loss of chroma, but also loss of
3104 * resolution, loss of color depth, loss due to the color space conversion, loss
3105 * of the alpha bits or loss due to color quantization.
3106 * avcodec_get_fix_fmt_loss() informs you about the various types of losses
3107 * which will occur when converting from one pixel format to another.
3108 *
3109 * @param[in] dst_pix_fmt destination pixel format
3110 * @param[in] src_pix_fmt source pixel format
3111 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
3112 * @return Combination of flags informing you what kind of losses will occur.
3113 */
3114 int avcodec_get_pix_fmt_loss(enum PixelFormat dst_pix_fmt, enum PixelFormat src_pix_fmt,
3115 int has_alpha);
3116
3117 /**
3118 * Finds the best pixel format to convert to given a certain source pixel
3119 * format. When converting from one pixel format to another, information loss
3120 * may occur. For example, when converting from RGB24 to GRAY, the color
3121 * information will be lost. Similarly, other losses occur when converting from
3122 * some formats to other formats. avcodec_find_best_pix_fmt() searches which of
3123 * the given pixel formats should be used to suffer the least amount of loss.
3124 * The pixel formats from which it chooses one, are determined by the
3125 * pix_fmt_mask parameter.
3126 *
3127 * @code
3128 * src_pix_fmt = PIX_FMT_YUV420P;
3129 * pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << PIX_FMT_RGB24);
3130 * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
3131 * @endcode
3132 *
3133 * @param[in] pix_fmt_mask bitmask determining which pixel format to choose from
3134 * @param[in] src_pix_fmt source pixel format
3135 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
3136 * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
3137 * @return The best pixel format to convert to or -1 if none was found.
3138 */
3139 enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt,
3140 int has_alpha, int *loss_ptr);
3141
3142
3143 /**
3144 * Print in buf the string corresponding to the pixel format with
3145 * number pix_fmt, or an header if pix_fmt is negative.
3146 *
3147 * @param[in] buf the buffer where to write the string
3148 * @param[in] buf_size the size of buf
3149 * @param[in] pix_fmt the number of the pixel format to print the corresponding info string, or
3150 * a negative value to print the corresponding header.
3151 * Meaningful values for obtaining a pixel format info vary from 0 to PIX_FMT_NB -1.
3152 */
3153 void avcodec_pix_fmt_string (char *buf, int buf_size, enum PixelFormat pix_fmt);
3154
3155 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
3156 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
3157
3158 /**
3159 * Tell if an image really has transparent alpha values.
3160 * @return ored mask of FF_ALPHA_xxx constants
3161 */
3162 int img_get_alpha_info(const AVPicture *src,
3163 enum PixelFormat pix_fmt, int width, int height);
3164
3165 /* deinterlace a picture */
3166 /* deinterlace - if not supported return -1 */
3167 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
3168 enum PixelFormat pix_fmt, int width, int height);
3169
3170 /* external high level API */
3171
3172 /**
3173 * If c is NULL, returns the first registered codec,
3174 * if c is non-NULL, returns the next registered codec after c,
3175 * or NULL if c is the last one.
3176 */
3177 AVCodec *av_codec_next(AVCodec *c);
3178
3179 /**
3180 * Returns the LIBAVCODEC_VERSION_INT constant.
3181 */
3182 unsigned avcodec_version(void);
3183
3184 /**
3185 * Returns the libavcodec build-time configuration.
3186 */
3187 const char *avcodec_configuration(void);
3188
3189 /**
3190 * Returns the libavcodec license.
3191 */
3192 const char *avcodec_license(void);
3193
3194 /**
3195 * Initializes libavcodec.
3196 *
3197 * @warning This function must be called before any other libavcodec
3198 * function.
3199 */
3200 void avcodec_init(void);
3201
3202 #if LIBAVCODEC_VERSION_MAJOR < 53
3203 /**
3204 * @deprecated Deprecated in favor of avcodec_register().
3205 */
3206 attribute_deprecated void register_avcodec(AVCodec *codec);
3207 #endif
3208
3209 /**
3210 * Register the codec codec and initialize libavcodec.
3211 *
3212 * @see avcodec_init()
3213 */
3214 void avcodec_register(AVCodec *codec);
3215
3216 /**
3217 * Finds a registered encoder with a matching codec ID.
3218 *
3219 * @param id CodecID of the requested encoder
3220 * @return An encoder if one was found, NULL otherwise.
3221 */
3222 AVCodec *avcodec_find_encoder(enum CodecID id);
3223
3224 /**
3225 * Finds a registered encoder with the specified name.
3226 *
3227 * @param name name of the requested encoder
3228 * @return An encoder if one was found, NULL otherwise.
3229 */
3230 AVCodec *avcodec_find_encoder_by_name(const char *name);
3231
3232 /**
3233 * Finds a registered decoder with a matching codec ID.
3234 *
3235 * @param id CodecID of the requested decoder
3236 * @return A decoder if one was found, NULL otherwise.
3237 */
3238 AVCodec *avcodec_find_decoder(enum CodecID id);
3239
3240 /**
3241 * Finds a registered decoder with the specified name.
3242 *
3243 * @param name name of the requested decoder
3244 * @return A decoder if one was found, NULL otherwise.
3245 */
3246 AVCodec *avcodec_find_decoder_by_name(const char *name);
3247 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
3248
3249 /**
3250 * Sets the fields of the given AVCodecContext to default values.
3251 *
3252 * @param s The AVCodecContext of which the fields should be set to default values.
3253 */
3254 void avcodec_get_context_defaults(AVCodecContext *s);
3255
3256 /** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3257 * we WILL change its arguments and name a few times! */
3258 void avcodec_get_context_defaults2(AVCodecContext *s, enum AVMediaType);
3259
3260 /**
3261 * Allocates an AVCodecContext and sets its fields to default values. The
3262 * resulting struct can be deallocated by simply calling av_free().
3263 *
3264 * @return An AVCodecContext filled with default values or NULL on failure.
3265 * @see avcodec_get_context_defaults
3266 */
3267 AVCodecContext *avcodec_alloc_context(void);
3268
3269 /** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3270 * we WILL change its arguments and name a few times! */
3271 AVCodecContext *avcodec_alloc_context2(enum AVMediaType);
3272
3273 /**
3274 * Copy the settings of the source AVCodecContext into the destination
3275 * AVCodecContext. The resulting destination codec context will be
3276 * unopened, i.e. you are required to call avcodec_open() before you
3277 * can use this AVCodecContext to decode/encode video/audio data.
3278 *
3279 * @param dest target codec context, should be initialized with
3280 * avcodec_alloc_context(), but otherwise uninitialized
3281 * @param src source codec context
3282 * @return AVERROR() on error (e.g. memory allocation error), 0 on success
3283 */
3284 int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src);
3285
3286 /**
3287 * Sets the fields of the given AVFrame to default values.
3288 *
3289 * @param pic The AVFrame of which the fields should be set to default values.
3290 */
3291 void avcodec_get_frame_defaults(AVFrame *pic);
3292
3293 /**
3294 * Allocates an AVFrame and sets its fields to default values. The resulting
3295 * struct can be deallocated by simply calling av_free().
3296 *
3297 * @return An AVFrame filled with default values or NULL on failure.
3298 * @see avcodec_get_frame_defaults
3299 */
3300 AVFrame *avcodec_alloc_frame(void);
3301
3302 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
3303 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
3304 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
3305
3306 /**
3307 * Returns the amount of padding in pixels which the get_buffer callback must
3308 * provide around the edge of the image for codecs which do not have the
3309 * CODEC_FLAG_EMU_EDGE flag.
3310 *
3311 * @return Required padding in pixels.
3312 */
3313 unsigned avcodec_get_edge_width(void);
3314 /**
3315 * Modifies width and height values so that they will result in a memory
3316 * buffer that is acceptable for the codec if you do not use any horizontal
3317 * padding.
3318 */
3319 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
3320 /**
3321 * Modifies width and height values so that they will result in a memory
3322 * buffer that is acceptable for the codec if you also ensure that all
3323 * line sizes are a multiple of the respective linesize_align[i].
3324 */
3325 void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
3326 int linesize_align[4]);
3327
3328 /**
3329 * Checks if the given dimension of a picture is valid, meaning that all
3330 * bytes of the picture can be addressed with a signed int.
3331 *
3332 * @param[in] w Width of the picture.
3333 * @param[in] h Height of the picture.
3334 * @return Zero if valid, a negative value if invalid.
3335 */
3336 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
3337 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
3338
3339 int avcodec_thread_init(AVCodecContext *s, int thread_count);
3340 void avcodec_thread_free(AVCodecContext *s);
3341 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size);
3342 int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int, int),void *arg, int *ret, int count);
3343 //FIXME func typedef
3344
3345 /**
3346 * Initializes the AVCodecContext to use the given AVCodec. Prior to using this
3347 * function the context has to be allocated.
3348 *
3349 * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
3350 * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
3351 * retrieving a codec.
3352 *
3353 * @warning This function is not thread safe!
3354 *
3355 * @code
3356 * avcodec_register_all();
3357 * codec = avcodec_find_decoder(CODEC_ID_H264);
3358 * if (!codec)
3359 * exit(1);
3360 *
3361 * context = avcodec_alloc_context();
3362 *
3363 * if (avcodec_open(context, codec) < 0)
3364 * exit(1);
3365 * @endcode
3366 *
3367 * @param avctx The context which will be set up to use the given codec.
3368 * @param codec The codec to use within the context.
3369 * @return zero on success, a negative value on error
3370 * @see avcodec_alloc_context, avcodec_find_decoder, avcodec_find_encoder
3371 */
3372 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
3373
3374 #if LIBAVCODEC_VERSION_MAJOR < 53
3375 /**
3376 * Decodes an audio frame from buf into samples.
3377 * Wrapper function which calls avcodec_decode_audio3.
3378 *
3379 * @deprecated Use avcodec_decode_audio3 instead.
3380 * @param avctx the codec context
3381 * @param[out] samples the output buffer
3382 * @param[in,out] frame_size_ptr the output buffer size in bytes
3383 * @param[in] buf the input buffer
3384 * @param[in] buf_size the input buffer size in bytes
3385 * @return On error a negative value is returned, otherwise the number of bytes
3386 * used or zero if no frame could be decompressed.
3387 */
3388 attribute_deprecated int avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
3389 int *frame_size_ptr,
3390 const uint8_t *buf, int buf_size);
3391 #endif
3392
3393 /**
3394 * Decodes the audio frame of size avpkt->size from avpkt->data into samples.
3395 * Some decoders may support multiple frames in a single AVPacket, such
3396 * decoders would then just decode the first frame. In this case,
3397 * avcodec_decode_audio3 has to be called again with an AVPacket that contains
3398 * the remaining data in order to decode the second frame etc.
3399 * If no frame
3400 * could be outputted, frame_size_ptr is zero. Otherwise, it is the
3401 * decompressed frame size in bytes.
3402 *
3403 * @warning You must set frame_size_ptr to the allocated size of the
3404 * output buffer before calling avcodec_decode_audio3().
3405 *
3406 * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
3407 * the actual read bytes because some optimized bitstream readers read 32 or 64
3408 * bits at once and could read over the end.
3409 *
3410 * @warning The end of the input buffer avpkt->data should be set to 0 to ensure that
3411 * no overreading happens for damaged MPEG streams.
3412 *
3413 * @note You might have to align the input buffer avpkt->data and output buffer
3414 * samples. The alignment requirements depend on the CPU: On some CPUs it isn't
3415 * necessary at all, on others it won't work at all if not aligned and on others
3416 * it will work but it will have an impact on performance.
3417 *
3418 * In practice, avpkt->data should have 4 byte alignment at minimum and
3419 * samples should be 16 byte aligned unless the CPU doesn't need it
3420 * (AltiVec and SSE do).
3421 *
3422 * @param avctx the codec context
3423 * @param[out] samples the output buffer, sample type in avctx->sample_fmt
3424 * @param[in,out] frame_size_ptr the output buffer size in bytes
3425 * @param[in] avpkt The input AVPacket containing the input buffer.
3426 * You can create such packet with av_init_packet() and by then setting
3427 * data and size, some decoders might in addition need other fields.
3428 * All decoders are designed to use the least fields possible though.
3429 * @return On error a negative value is returned, otherwise the number of bytes
3430 * used or zero if no frame data was decompressed (used) from the input AVPacket.
3431 */
3432 int avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
3433 int *frame_size_ptr,
3434 AVPacket *avpkt);
3435
3436 #if LIBAVCODEC_VERSION_MAJOR < 53
3437 /**
3438 * Decodes a video frame from buf into picture.
3439 * Wrapper function which calls avcodec_decode_video2.
3440 *
3441 * @deprecated Use avcodec_decode_video2 instead.
3442 * @param avctx the codec context
3443 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
3444 * @param[in] buf the input buffer
3445 * @param[in] buf_size the size of the input buffer in bytes
3446 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
3447 * @return On error a negative value is returned, otherwise the number of bytes
3448 * used or zero if no frame could be decompressed.
3449 */
3450 attribute_deprecated int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
3451 int *got_picture_ptr,
3452 const uint8_t *buf, int buf_size);
3453 #endif
3454
3455 /**
3456 * Decodes the video frame of size avpkt->size from avpkt->data into picture.
3457 * Some decoders may support multiple frames in a single AVPacket, such
3458 * decoders would then just decode the first frame.
3459 *
3460 * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
3461 * the actual read bytes because some optimized bitstream readers read 32 or 64
3462 * bits at once and could read over the end.
3463 *
3464 * @warning The end of the input buffer buf should be set to 0 to ensure that
3465 * no overreading happens for damaged MPEG streams.
3466 *
3467 * @note You might have to align the input buffer avpkt->data.
3468 * The alignment requirements depend on the CPU: on some CPUs it isn't
3469 * necessary at all, on others it won't work at all if not aligned and on others
3470 * it will work but it will have an impact on performance.
3471 *
3472 * In practice, avpkt->data should have 4 byte alignment at minimum.
3473 *
3474 * @note Some codecs have a delay between input and output, these need to be
3475 * fed with avpkt->data=NULL, avpkt->size=0 at the end to return the remaining frames.
3476 *
3477 * @param avctx the codec context
3478 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
3479 * Use avcodec_alloc_frame to get an AVFrame, the codec will
3480 * allocate memory for the actual bitmap.
3481 * @param[in] avpkt The input AVpacket containing the input buffer.
3482 * You can create such packet with av_init_packet() and by then setting
3483 * data and size, some decoders might in addition need other fields like
3484 * flags&AV_PKT_FLAG_KEY. All decoders are designed to use the least
3485 * fields possible.
3486 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
3487 * @return On error a negative value is returned, otherwise the number of bytes
3488 * used or zero if no frame could be decompressed.
3489 */
3490 int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
3491 int *got_picture_ptr,
3492 AVPacket *avpkt);
3493
3494 #if LIBAVCODEC_VERSION_MAJOR < 53
3495 /* Decode a subtitle message. Return -1 if error, otherwise return the
3496 * number of bytes used. If no subtitle could be decompressed,
3497 * got_sub_ptr is zero. Otherwise, the subtitle is stored in *sub. */
3498 attribute_deprecated int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
3499 int *got_sub_ptr,
3500 const uint8_t *buf, int buf_size);
3501 #endif
3502
3503 /**
3504 * Decodes a subtitle message.
3505 * Returns a negative value on error, otherwise returns the number of bytes used.
3506 * If no subtitle could be decompressed, got_sub_ptr is zero.
3507 * Otherwise, the subtitle is stored in *sub.
3508 *
3509 * @param avctx the codec context
3510 * @param[out] sub The AVSubtitle in which the decoded subtitle will be stored.
3511 * @param[in,out] got_sub_ptr Zero if no subtitle could be decompressed, otherwise, it is nonzero.
3512 * @param[in] avpkt The input AVPacket containing the input buffer.
3513 */
3514 int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
3515 int *got_sub_ptr,
3516 AVPacket *avpkt);
3517 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
3518 int *data_size_ptr,
3519 uint8_t *buf, int buf_size);
3520
3521 /**
3522 * Encodes an audio frame from samples into buf.
3523 *
3524 * @note The output buffer should be at least FF_MIN_BUFFER_SIZE bytes large.
3525 * However, for PCM audio the user will know how much space is needed
3526 * because it depends on the value passed in buf_size as described
3527 * below. In that case a lower value can be used.
3528 *
3529 * @param avctx the codec context
3530 * @param[out] buf the output buffer
3531 * @param[in] buf_size the output buffer size
3532 * @param[in] samples the input buffer containing the samples
3533 * The number of samples read from this buffer is frame_size*channels,
3534 * both of which are defined in avctx.
3535 * For PCM audio the number of samples read from samples is equal to
3536 * buf_size * input_sample_size / output_sample_size.
3537 * @return On error a negative value is returned, on success zero or the number
3538 * of bytes used to encode the data read from the input buffer.
3539 */
3540 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3541 const short *samples);
3542
3543 /**
3544 * Encodes a video frame from pict into buf.
3545 * The input picture should be
3546 * stored using a specific format, namely avctx.pix_fmt.
3547 *
3548 * @param avctx the codec context
3549 * @param[out] buf the output buffer for the bitstream of encoded frame
3550 * @param[in] buf_size the size of the output buffer in bytes
3551 * @param[in] pict the input picture to encode
3552 * @return On error a negative value is returned, on success zero or the number
3553 * of bytes used from the output buffer.
3554 */
3555 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3556 const AVFrame *pict);
3557 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3558 const AVSubtitle *sub);
3559
3560 int avcodec_close(AVCodecContext *avctx);
3561
3562 /**
3563 * Register all the codecs, parsers and bitstream filters which were enabled at
3564 * configuration time. If you do not call this function you can select exactly
3565 * which formats you want to support, by using the individual registration
3566 * functions.
3567 *
3568 * @see avcodec_register
3569 * @see av_register_codec_parser
3570 * @see av_register_bitstream_filter
3571 */
3572 void avcodec_register_all(void);
3573
3574 /**
3575 * Flush buffers, should be called when seeking or when switching to a different stream.
3576 */
3577 void avcodec_flush_buffers(AVCodecContext *avctx);
3578
3579 void avcodec_default_free_buffers(AVCodecContext *s);
3580
3581 /* misc useful functions */
3582
3583 /**
3584 * Returns a single letter to describe the given picture type pict_type.
3585 *
3586 * @param[in] pict_type the picture type
3587 * @return A single character representing the picture type.
3588 */
3589 char av_get_pict_type_char(int pict_type);
3590
3591 /**
3592 * Returns codec bits per sample.
3593 *
3594 * @param[in] codec_id the codec
3595 * @return Number of bits per sample or zero if unknown for the given codec.
3596 */
3597 int av_get_bits_per_sample(enum CodecID codec_id);
3598
3599 /**
3600 * Returns sample format bits per sample.
3601 *
3602 * @param[in] sample_fmt the sample format
3603 * @return Number of bits per sample or zero if unknown for the given sample format.
3604 */
3605 int av_get_bits_per_sample_format(enum SampleFormat sample_fmt);
3606
3607 /* frame parsing */
3608 typedef struct AVCodecParserContext {
3609 void *priv_data;
3610 struct AVCodecParser *parser;
3611 int64_t frame_offset; /* offset of the current frame */
3612 int64_t cur_offset; /* current offset
3613 (incremented by each av_parser_parse()) */
3614 int64_t next_frame_offset; /* offset of the next frame */
3615 /* video info */
3616 int pict_type; /* XXX: Put it back in AVCodecContext. */
3617 /**
3618 * This field is used for proper frame duration computation in lavf.
3619 * It signals, how much longer the frame duration of the current frame
3620 * is compared to normal frame duration.
3621 *
3622 * frame_duration = (1 + repeat_pict) * time_base
3623 *
3624 * It is used by codecs like H.264 to display telecined material.
3625 */
3626 int repeat_pict; /* XXX: Put it back in AVCodecContext. */
3627 int64_t pts; /* pts of the current frame */
3628 int64_t dts; /* dts of the current frame */
3629
3630 /* private data */
3631 int64_t last_pts;
3632 int64_t last_dts;
3633 int fetch_timestamp;
3634
3635 #define AV_PARSER_PTS_NB 4
3636 int cur_frame_start_index;
3637 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
3638 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
3639 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
3640
3641 int flags;
3642 #define PARSER_FLAG_COMPLETE_FRAMES 0x0001
3643
3644 int64_t offset; ///< byte offset from starting packet start
3645 int64_t cur_frame_end[AV_PARSER_PTS_NB];
3646
3647 /*!
3648 * Set by parser to 1 for key frames and 0 for non-key frames.
3649 * It is initialized to -1, so if the parser doesn't set this flag,
3650 * old-style fallback using FF_I_TYPE picture type as key frames
3651 * will be used.
3652 */
3653 int key_frame;
3654
3655 /**
3656 * Time difference in stream time base units from the pts of this
3657 * packet to the point at which the output from the decoder has converged
3658 * independent from the availability of previous frames. That is, the
3659 * frames are virtually identical no matter if decoding started from
3660 * the very first frame or from this keyframe.
3661 * Is AV_NOPTS_VALUE if unknown.
3662 * This field is not the display duration of the current frame.
3663 *
3664 * The purpose of this field is to allow seeking in streams that have no
3665 * keyframes in the conventional sense. It corresponds to the
3666 * recovery point SEI in H.264 and match_time_delta in NUT. It is also
3667 * essential for some types of subtitle streams to ensure that all
3668 * subtitles are correctly displayed after seeking.
3669 */
3670 int64_t convergence_duration;
3671
3672 // Timestamp generation support:
3673 /**
3674 * Synchronization point for start of timestamp generation.
3675 *
3676 * Set to >0 for sync point, 0 for no sync point and <0 for undefined
3677 * (default).
3678 *
3679 * For example, this corresponds to presence of H.264 buffering period
3680 * SEI message.
3681 */
3682 int dts_sync_point;
3683
3684 /**
3685 * Offset of the current timestamp against last timestamp sync point in
3686 * units of AVCodecContext.time_base.
3687 *
3688 * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
3689 * contain a valid timestamp offset.
3690 *
3691 * Note that the timestamp of sync point has usually a nonzero
3692 * dts_ref_dts_delta, which refers to the previous sync point. Offset of
3693 * the next frame after timestamp sync point will be usually 1.
3694 *
3695 * For example, this corresponds to H.264 cpb_removal_delay.
3696 */
3697 int dts_ref_dts_delta;
3698
3699 /**
3700 * Presentation delay of current frame in units of AVCodecContext.time_base.
3701 *
3702 * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
3703 * contain valid non-negative timestamp delta (presentation time of a frame
3704 * must not lie in the past).
3705 *
3706 * This delay represents the difference between decoding and presentation
3707 * time of the frame.
3708 *
3709 * For example, this corresponds to H.264 dpb_output_delay.
3710 */
3711 int pts_dts_delta;
3712
3713 /**
3714 * Position of the packet in file.
3715 *
3716 * Analogous to cur_frame_pts/dts
3717 */
3718 int64_t cur_frame_pos[AV_PARSER_PTS_NB];
3719
3720 /**
3721 * Byte position of currently parsed frame in stream.
3722 */
3723 int64_t pos;
3724
3725 /**
3726 * Previous frame byte position.
3727 */
3728 int64_t last_pos;
3729 } AVCodecParserContext;
3730
3731 typedef struct AVCodecParser {
3732 int codec_ids[5]; /* several codec IDs are permitted */
3733 int priv_data_size;
3734 int (*parser_init)(AVCodecParserContext *s);
3735 int (*parser_parse)(AVCodecParserContext *s,
3736 AVCodecContext *avctx,
3737 const uint8_t **poutbuf, int *poutbuf_size,
3738 const uint8_t *buf, int buf_size);
3739 void (*parser_close)(AVCodecParserContext *s);
3740 int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
3741 struct AVCodecParser *next;
3742 } AVCodecParser;
3743
3744 AVCodecParser *av_parser_next(AVCodecParser *c);
3745
3746 void av_register_codec_parser(AVCodecParser *parser);
3747 AVCodecParserContext *av_parser_init(int codec_id);
3748
3749 #if LIBAVCODEC_VERSION_MAJOR < 53
3750 attribute_deprecated
3751 int av_parser_parse(AVCodecParserContext *s,
3752 AVCodecContext *avctx,
3753 uint8_t **poutbuf, int *poutbuf_size,
3754 const uint8_t *buf, int buf_size,
3755 int64_t pts, int64_t dts);
3756 #endif
3757
3758 /**
3759 * Parse a packet.
3760 *
3761 * @param s parser context.
3762 * @param avctx codec context.
3763 * @param poutbuf set to pointer to parsed buffer or NULL if not yet finished.
3764 * @param poutbuf_size set to size of parsed buffer or zero if not yet finished.
3765 * @param buf input buffer.
3766 * @param buf_size input length, to signal EOF, this should be 0 (so that the last frame can be output).
3767 * @param pts input presentation timestamp.
3768 * @param dts input decoding timestamp.
3769 * @param pos input byte position in stream.
3770 * @return the number of bytes of the input bitstream used.
3771 *
3772 * Example:
3773 * @code
3774 * while(in_len){
3775 * len = av_parser_parse2(myparser, AVCodecContext, &data, &size,
3776 * in_data, in_len,
3777 * pts, dts, pos);
3778 * in_data += len;
3779 * in_len -= len;
3780 *
3781 * if(size)
3782 * decode_frame(data, size);
3783 * }
3784 * @endcode
3785 */
3786 int av_parser_parse2(AVCodecParserContext *s,
3787 AVCodecContext *avctx,
3788 uint8_t **poutbuf, int *poutbuf_size,
3789 const uint8_t *buf, int buf_size,