Clearer CODEC_CAP_DR1 documentation.
[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 libavcodec/avcodec.h
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 61
34 #define LIBAVCODEC_VERSION_MICRO 0
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
213 /* various PCM "codecs" */
214 CODEC_ID_PCM_S16LE= 0x10000,
215 CODEC_ID_PCM_S16BE,
216 CODEC_ID_PCM_U16LE,
217 CODEC_ID_PCM_U16BE,
218 CODEC_ID_PCM_S8,
219 CODEC_ID_PCM_U8,
220 CODEC_ID_PCM_MULAW,
221 CODEC_ID_PCM_ALAW,
222 CODEC_ID_PCM_S32LE,
223 CODEC_ID_PCM_S32BE,
224 CODEC_ID_PCM_U32LE,
225 CODEC_ID_PCM_U32BE,
226 CODEC_ID_PCM_S24LE,
227 CODEC_ID_PCM_S24BE,
228 CODEC_ID_PCM_U24LE,
229 CODEC_ID_PCM_U24BE,
230 CODEC_ID_PCM_S24DAUD,
231 CODEC_ID_PCM_ZORK,
232 CODEC_ID_PCM_S16LE_PLANAR,
233 CODEC_ID_PCM_DVD,
234 CODEC_ID_PCM_F32BE,
235 CODEC_ID_PCM_F32LE,
236 CODEC_ID_PCM_F64BE,
237 CODEC_ID_PCM_F64LE,
238 CODEC_ID_PCM_BLURAY,
239
240 /* various ADPCM codecs */
241 CODEC_ID_ADPCM_IMA_QT= 0x11000,
242 CODEC_ID_ADPCM_IMA_WAV,
243 CODEC_ID_ADPCM_IMA_DK3,
244 CODEC_ID_ADPCM_IMA_DK4,
245 CODEC_ID_ADPCM_IMA_WS,
246 CODEC_ID_ADPCM_IMA_SMJPEG,
247 CODEC_ID_ADPCM_MS,
248 CODEC_ID_ADPCM_4XM,
249 CODEC_ID_ADPCM_XA,
250 CODEC_ID_ADPCM_ADX,
251 CODEC_ID_ADPCM_EA,
252 CODEC_ID_ADPCM_G726,
253 CODEC_ID_ADPCM_CT,
254 CODEC_ID_ADPCM_SWF,
255 CODEC_ID_ADPCM_YAMAHA,
256 CODEC_ID_ADPCM_SBPRO_4,
257 CODEC_ID_ADPCM_SBPRO_3,
258 CODEC_ID_ADPCM_SBPRO_2,
259 CODEC_ID_ADPCM_THP,
260 CODEC_ID_ADPCM_IMA_AMV,
261 CODEC_ID_ADPCM_EA_R1,
262 CODEC_ID_ADPCM_EA_R3,
263 CODEC_ID_ADPCM_EA_R2,
264 CODEC_ID_ADPCM_IMA_EA_SEAD,
265 CODEC_ID_ADPCM_IMA_EA_EACS,
266 CODEC_ID_ADPCM_EA_XAS,
267 CODEC_ID_ADPCM_EA_MAXIS_XA,
268 CODEC_ID_ADPCM_IMA_ISS,
269
270 /* AMR */
271 CODEC_ID_AMR_NB= 0x12000,
272 CODEC_ID_AMR_WB,
273
274 /* RealAudio codecs*/
275 CODEC_ID_RA_144= 0x13000,
276 CODEC_ID_RA_288,
277
278 /* various DPCM codecs */
279 CODEC_ID_ROQ_DPCM= 0x14000,
280 CODEC_ID_INTERPLAY_DPCM,
281 CODEC_ID_XAN_DPCM,
282 CODEC_ID_SOL_DPCM,
283
284 /* audio codecs */
285 CODEC_ID_MP2= 0x15000,
286 CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3
287 CODEC_ID_AAC,
288 CODEC_ID_AC3,
289 CODEC_ID_DTS,
290 CODEC_ID_VORBIS,
291 CODEC_ID_DVAUDIO,
292 CODEC_ID_WMAV1,
293 CODEC_ID_WMAV2,
294 CODEC_ID_MACE3,
295 CODEC_ID_MACE6,
296 CODEC_ID_VMDAUDIO,
297 CODEC_ID_SONIC,
298 CODEC_ID_SONIC_LS,
299 CODEC_ID_FLAC,
300 CODEC_ID_MP3ADU,
301 CODEC_ID_MP3ON4,
302 CODEC_ID_SHORTEN,
303 CODEC_ID_ALAC,
304 CODEC_ID_WESTWOOD_SND1,
305 CODEC_ID_GSM, ///< as in Berlin toast format
306 CODEC_ID_QDM2,
307 CODEC_ID_COOK,
308 CODEC_ID_TRUESPEECH,
309 CODEC_ID_TTA,
310 CODEC_ID_SMACKAUDIO,
311 CODEC_ID_QCELP,
312 CODEC_ID_WAVPACK,
313 CODEC_ID_DSICINAUDIO,
314 CODEC_ID_IMC,
315 CODEC_ID_MUSEPACK7,
316 CODEC_ID_MLP,
317 CODEC_ID_GSM_MS, /* as found in WAV */
318 CODEC_ID_ATRAC3,
319 CODEC_ID_VOXWARE,
320 CODEC_ID_APE,
321 CODEC_ID_NELLYMOSER,
322 CODEC_ID_MUSEPACK8,
323 CODEC_ID_SPEEX,
324 CODEC_ID_WMAVOICE,
325 CODEC_ID_WMAPRO,
326 CODEC_ID_WMALOSSLESS,
327 CODEC_ID_ATRAC3P,
328 CODEC_ID_EAC3,
329 CODEC_ID_SIPR,
330 CODEC_ID_MP1,
331 CODEC_ID_TWINVQ,
332 CODEC_ID_TRUEHD,
333 CODEC_ID_MP4ALS,
334 CODEC_ID_ATRAC1,
335 CODEC_ID_BINKAUDIO_RDFT,
336 CODEC_ID_BINKAUDIO_DCT,
337
338 /* subtitle codecs */
339 CODEC_ID_DVD_SUBTITLE= 0x17000,
340 CODEC_ID_DVB_SUBTITLE,
341 CODEC_ID_TEXT, ///< raw UTF-8 text
342 CODEC_ID_XSUB,
343 CODEC_ID_SSA,
344 CODEC_ID_MOV_TEXT,
345 CODEC_ID_HDMV_PGS_SUBTITLE,
346 CODEC_ID_DVB_TELETEXT,
347
348 /* other specific kind of codecs (generally used for attachments) */
349 CODEC_ID_TTF= 0x18000,
350
351 CODEC_ID_PROBE= 0x19000, ///< codec_id is not known (like CODEC_ID_NONE) but lavf should attempt to identify it
352
353 CODEC_ID_MPEG2TS= 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS
354 * stream (only used by libavformat) */
355 };
356
357 enum CodecType {
358 CODEC_TYPE_UNKNOWN = -1,
359 CODEC_TYPE_VIDEO,
360 CODEC_TYPE_AUDIO,
361 CODEC_TYPE_DATA,
362 CODEC_TYPE_SUBTITLE,
363 CODEC_TYPE_ATTACHMENT,
364 CODEC_TYPE_NB
365 };
366
367 /**
368 * all in native-endian format
369 */
370 enum SampleFormat {
371 SAMPLE_FMT_NONE = -1,
372 SAMPLE_FMT_U8, ///< unsigned 8 bits
373 SAMPLE_FMT_S16, ///< signed 16 bits
374 SAMPLE_FMT_S32, ///< signed 32 bits
375 SAMPLE_FMT_FLT, ///< float
376 SAMPLE_FMT_DBL, ///< double
377 SAMPLE_FMT_NB ///< Number of sample formats. DO NOT USE if dynamically linking to libavcodec
378 };
379
380 /* Audio channel masks */
381 #define CH_FRONT_LEFT 0x00000001
382 #define CH_FRONT_RIGHT 0x00000002
383 #define CH_FRONT_CENTER 0x00000004
384 #define CH_LOW_FREQUENCY 0x00000008
385 #define CH_BACK_LEFT 0x00000010
386 #define CH_BACK_RIGHT 0x00000020
387 #define CH_FRONT_LEFT_OF_CENTER 0x00000040
388 #define CH_FRONT_RIGHT_OF_CENTER 0x00000080
389 #define CH_BACK_CENTER 0x00000100
390 #define CH_SIDE_LEFT 0x00000200
391 #define CH_SIDE_RIGHT 0x00000400
392 #define CH_TOP_CENTER 0x00000800
393 #define CH_TOP_FRONT_LEFT 0x00001000
394 #define CH_TOP_FRONT_CENTER 0x00002000
395 #define CH_TOP_FRONT_RIGHT 0x00004000
396 #define CH_TOP_BACK_LEFT 0x00008000
397 #define CH_TOP_BACK_CENTER 0x00010000
398 #define CH_TOP_BACK_RIGHT 0x00020000
399 #define CH_STEREO_LEFT 0x20000000 ///< Stereo downmix.
400 #define CH_STEREO_RIGHT 0x40000000 ///< See CH_STEREO_LEFT.
401
402 /** Channel mask value used for AVCodecContext.request_channel_layout
403 to indicate that the user requests the channel order of the decoder output
404 to be the native codec channel order. */
405 #define CH_LAYOUT_NATIVE 0x8000000000000000LL
406
407 /* Audio channel convenience macros */
408 #define CH_LAYOUT_MONO (CH_FRONT_CENTER)
409 #define CH_LAYOUT_STEREO (CH_FRONT_LEFT|CH_FRONT_RIGHT)
410 #define CH_LAYOUT_2_1 (CH_LAYOUT_STEREO|CH_BACK_CENTER)
411 #define CH_LAYOUT_SURROUND (CH_LAYOUT_STEREO|CH_FRONT_CENTER)
412 #define CH_LAYOUT_4POINT0 (CH_LAYOUT_SURROUND|CH_BACK_CENTER)
413 #define CH_LAYOUT_2_2 (CH_LAYOUT_STEREO|CH_SIDE_LEFT|CH_SIDE_RIGHT)
414 #define CH_LAYOUT_QUAD (CH_LAYOUT_STEREO|CH_BACK_LEFT|CH_BACK_RIGHT)
415 #define CH_LAYOUT_5POINT0 (CH_LAYOUT_SURROUND|CH_SIDE_LEFT|CH_SIDE_RIGHT)
416 #define CH_LAYOUT_5POINT1 (CH_LAYOUT_5POINT0|CH_LOW_FREQUENCY)
417 #define CH_LAYOUT_5POINT0_BACK (CH_LAYOUT_SURROUND|CH_BACK_LEFT|CH_BACK_RIGHT)
418 #define CH_LAYOUT_5POINT1_BACK (CH_LAYOUT_5POINT0_BACK|CH_LOW_FREQUENCY)
419 #define CH_LAYOUT_7POINT0 (CH_LAYOUT_5POINT0|CH_BACK_LEFT|CH_BACK_RIGHT)
420 #define CH_LAYOUT_7POINT1 (CH_LAYOUT_5POINT1|CH_BACK_LEFT|CH_BACK_RIGHT)
421 #define CH_LAYOUT_7POINT1_WIDE (CH_LAYOUT_5POINT1_BACK|\
422 CH_FRONT_LEFT_OF_CENTER|CH_FRONT_RIGHT_OF_CENTER)
423 #define CH_LAYOUT_STEREO_DOWNMIX (CH_STEREO_LEFT|CH_STEREO_RIGHT)
424
425 /* in bytes */
426 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
427
428 /**
429 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
430 * This is mainly needed because some optimized bitstream readers read
431 * 32 or 64 bit at once and could read over the end.<br>
432 * Note: If the first 23 bits of the additional bytes are not 0, then damaged
433 * MPEG bitstreams could cause overread and segfault.
434 */
435 #define FF_INPUT_BUFFER_PADDING_SIZE 8
436
437 /**
438 * minimum encoding buffer size
439 * Used to avoid some checks during header writing.
440 */
441 #define FF_MIN_BUFFER_SIZE 16384
442
443
444 /**
445 * motion estimation type.
446 */
447 enum Motion_Est_ID {
448 ME_ZERO = 1, ///< no search, that is use 0,0 vector whenever one is needed
449 ME_FULL,
450 ME_LOG,
451 ME_PHODS,
452 ME_EPZS, ///< enhanced predictive zonal search
453 ME_X1, ///< reserved for experiments
454 ME_HEX, ///< hexagon based search
455 ME_UMH, ///< uneven multi-hexagon search
456 ME_ITER, ///< iterative search
457 ME_TESA, ///< transformed exhaustive search algorithm
458 };
459
460 enum AVDiscard{
461 /* We leave some space between them for extensions (drop some
462 * keyframes for intra-only or drop just some bidir frames). */
463 AVDISCARD_NONE =-16, ///< discard nothing
464 AVDISCARD_DEFAULT= 0, ///< discard useless packets like 0 size packets in avi
465 AVDISCARD_NONREF = 8, ///< discard all non reference
466 AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
467 AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
468 AVDISCARD_ALL = 48, ///< discard all
469 };
470
471 enum AVColorPrimaries{
472 AVCOL_PRI_BT709 =1, ///< also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP177 Annex B
473 AVCOL_PRI_UNSPECIFIED=2,
474 AVCOL_PRI_BT470M =4,
475 AVCOL_PRI_BT470BG =5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM
476 AVCOL_PRI_SMPTE170M =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC
477 AVCOL_PRI_SMPTE240M =7, ///< functionally identical to above
478 AVCOL_PRI_FILM =8,
479 AVCOL_PRI_NB , ///< Not part of ABI
480 };
481
482 enum AVColorTransferCharacteristic{
483 AVCOL_TRC_BT709 =1, ///< also ITU-R BT1361
484 AVCOL_TRC_UNSPECIFIED=2,
485 AVCOL_TRC_GAMMA22 =4, ///< also ITU-R BT470M / ITU-R BT1700 625 PAL & SECAM
486 AVCOL_TRC_GAMMA28 =5, ///< also ITU-R BT470BG
487 AVCOL_TRC_NB , ///< Not part of ABI
488 };
489
490 enum AVColorSpace{
491 AVCOL_SPC_RGB =0,
492 AVCOL_SPC_BT709 =1, ///< also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
493 AVCOL_SPC_UNSPECIFIED=2,
494 AVCOL_SPC_FCC =4,
495 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
496 AVCOL_SPC_SMPTE170M =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC / functionally identical to above
497 AVCOL_SPC_SMPTE240M =7,
498 AVCOL_SPC_NB , ///< Not part of ABI
499 };
500
501 enum AVColorRange{
502 AVCOL_RANGE_UNSPECIFIED=0,
503 AVCOL_RANGE_MPEG =1, ///< the normal 219*2^(n-8) "MPEG" YUV ranges
504 AVCOL_RANGE_JPEG =2, ///< the normal 2^n-1 "JPEG" YUV ranges
505 AVCOL_RANGE_NB , ///< Not part of ABI
506 };
507
508 /**
509 * X X 3 4 X X are luma samples,
510 * 1 2 1-6 are possible chroma positions
511 * X X 5 6 X 0 is undefined/unknown position
512 */
513 enum AVChromaLocation{
514 AVCHROMA_LOC_UNSPECIFIED=0,
515 AVCHROMA_LOC_LEFT =1, ///< mpeg2/4, h264 default
516 AVCHROMA_LOC_CENTER =2, ///< mpeg1, jpeg, h263
517 AVCHROMA_LOC_TOPLEFT =3, ///< DV
518 AVCHROMA_LOC_TOP =4,
519 AVCHROMA_LOC_BOTTOMLEFT =5,
520 AVCHROMA_LOC_BOTTOM =6,
521 AVCHROMA_LOC_NB , ///< Not part of ABI
522 };
523
524 typedef struct RcOverride{
525 int start_frame;
526 int end_frame;
527 int qscale; // If this is 0 then quality_factor will be used instead.
528 float quality_factor;
529 } RcOverride;
530
531 #define FF_MAX_B_FRAMES 16
532
533 /* encoding support
534 These flags can be passed in AVCodecContext.flags before initialization.
535 Note: Not everything is supported yet.
536 */
537
538 #define CODEC_FLAG_QSCALE 0x0002 ///< Use fixed qscale.
539 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / advanced prediction for H.263.
540 #define CODEC_FLAG_QPEL 0x0010 ///< Use qpel MC.
541 #define CODEC_FLAG_GMC 0x0020 ///< Use GMC.
542 #define CODEC_FLAG_MV0 0x0040 ///< Always try a MB with MV=<0,0>.
543 #define CODEC_FLAG_PART 0x0080 ///< Use data partitioning.
544 /**
545 * The parent program guarantees that the input for B-frames containing
546 * streams is not written to for at least s->max_b_frames+1 frames, if
547 * this is not set the input will be copied.
548 */
549 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
550 #define CODEC_FLAG_PASS1 0x0200 ///< Use internal 2pass ratecontrol in first pass mode.
551 #define CODEC_FLAG_PASS2 0x0400 ///< Use internal 2pass ratecontrol in second pass mode.
552 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< Use external Huffman table (for MJPEG).
553 #define CODEC_FLAG_GRAY 0x2000 ///< Only decode/encode grayscale.
554 #define CODEC_FLAG_EMU_EDGE 0x4000 ///< Don't draw edges.
555 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding.
556 #define CODEC_FLAG_TRUNCATED 0x00010000 /** Input bitstream might be truncated at a random
557 location instead of only at frame boundaries. */
558 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< Normalize adaptive quantization.
559 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT.
560 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< Force low delay.
561 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< Use alternate scan.
562 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< Place global headers in extradata instead of every keyframe.
563 #define CODEC_FLAG_BITEXACT 0x00800000 ///< Use only bitexact stuff (except (I)DCT).
564 /* Fx : Flag for h263+ extra options */
565 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction
566 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< unlimited motion vector
567 #define CODEC_FLAG_CBP_RD 0x04000000 ///< Use rate distortion optimization for cbp.
568 #define CODEC_FLAG_QP_RD 0x08000000 ///< Use rate distortion optimization for qp selectioon.
569 #define CODEC_FLAG_H263P_AIV 0x00000008 ///< H.263 alternative inter VLC
570 #define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
571 #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
572 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
573 #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
574 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< Will reserve space for SVCD scan offset user data.
575 #define CODEC_FLAG_CLOSED_GOP 0x80000000
576 #define CODEC_FLAG2_FAST 0x00000001 ///< Allow non spec compliant speedup tricks.
577 #define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< Strictly enforce GOP size.
578 #define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< Skip bitstream encoding.
579 #define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< Place global headers at every keyframe instead of in extradata.
580 #define CODEC_FLAG2_BPYRAMID 0x00000010 ///< H.264 allow B-frames to be used as references.
581 #define CODEC_FLAG2_WPRED 0x00000020 ///< H.264 weighted biprediction for B-frames
582 #define CODEC_FLAG2_MIXED_REFS 0x00000040 ///< H.264 one reference per partition, as opposed to one reference per macroblock
583 #define CODEC_FLAG2_8X8DCT 0x00000080 ///< H.264 high profile 8x8 transform
584 #define CODEC_FLAG2_FASTPSKIP 0x00000100 ///< H.264 fast pskip
585 #define CODEC_FLAG2_AUD 0x00000200 ///< H.264 access unit delimiters
586 #define CODEC_FLAG2_BRDO 0x00000400 ///< B-frame rate-distortion optimization
587 #define CODEC_FLAG2_INTRA_VLC 0x00000800 ///< Use MPEG-2 intra VLC table.
588 #define CODEC_FLAG2_MEMC_ONLY 0x00001000 ///< Only do ME/MC (I frames -> ref, P frame -> ME+MC).
589 #define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format.
590 #define CODEC_FLAG2_SKIP_RD 0x00004000 ///< RD optimal MB level residual skipping
591 #define CODEC_FLAG2_CHUNKS 0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
592 #define CODEC_FLAG2_NON_LINEAR_QUANT 0x00010000 ///< Use MPEG-2 nonlinear quantizer.
593 #define CODEC_FLAG2_BIT_RESERVOIR 0x00020000 ///< Use a bit reservoir when encoding if possible
594 #define CODEC_FLAG2_MBTREE 0x00040000 ///< Use macroblock tree ratecontrol (x264 only)
595 #define CODEC_FLAG2_PSY 0x00080000 ///< Use psycho visual optimizations.
596 #define CODEC_FLAG2_SSIM 0x00100000 ///< Compute SSIM during encoding, error[] values are undefined.
597
598 /* Unsupported options :
599 * Syntax Arithmetic coding (SAC)
600 * Reference Picture Selection
601 * Independent Segment Decoding */
602 /* /Fx */
603 /* codec capabilities */
604
605 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback.
606 /**
607 * Codec uses get_buffer() for allocating buffers and supports custom allocators.
608 * If not set, it might not use get_buffer() at all or use operations that
609 * assume the buffer was allocated by avcodec_default_get_buffer.
610 */
611 #define CODEC_CAP_DR1 0x0002
612 /* If 'parse_only' field is true, then avcodec_parse_frame() can be used. */
613 #define CODEC_CAP_PARSE_ONLY 0x0004
614 #define CODEC_CAP_TRUNCATED 0x0008
615 /* Codec can export data for HW decoding (XvMC). */
616 #define CODEC_CAP_HWACCEL 0x0010
617 /**
618 * Codec has a nonzero delay and needs to be fed with NULL at the end to get the delayed data.
619 * If this is not set, the codec is guaranteed to never be fed with NULL data.
620 */
621 #define CODEC_CAP_DELAY 0x0020
622 /**
623 * Codec can be fed a final frame with a smaller size.
624 * This can be used to prevent truncation of the last audio samples.
625 */
626 #define CODEC_CAP_SMALL_LAST_FRAME 0x0040
627 /**
628 * Codec can export data for HW decoding (VDPAU).
629 */
630 #define CODEC_CAP_HWACCEL_VDPAU 0x0080
631 /**
632 * Codec can output multiple frames per AVPacket
633 * Normally demuxers return one frame at a time, demuxers which do not do
634 * are connected to a parser to split what they return into proper frames.
635 * This flag is reserved to the very rare category of codecs which have a
636 * bitstream that cannot be split into frames without timeconsuming
637 * operations like full decoding. Demuxers carring such bitstreams thus
638 * may return multiple frames in a packet. This has many disadvantages like
639 * prohibiting stream copy in many cases thus it should only be considered
640 * as a last resort.
641 */
642 #define CODEC_CAP_SUBFRAMES 0x0100
643
644 //The following defines may change, don't expect compatibility if you use them.
645 #define MB_TYPE_INTRA4x4 0x0001
646 #define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
647 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME H.264-specific
648 #define MB_TYPE_16x16 0x0008
649 #define MB_TYPE_16x8 0x0010
650 #define MB_TYPE_8x16 0x0020
651 #define MB_TYPE_8x8 0x0040
652 #define MB_TYPE_INTERLACED 0x0080
653 #define MB_TYPE_DIRECT2 0x0100 //FIXME
654 #define MB_TYPE_ACPRED 0x0200
655 #define MB_TYPE_GMC 0x0400
656 #define MB_TYPE_SKIP 0x0800
657 #define MB_TYPE_P0L0 0x1000
658 #define MB_TYPE_P1L0 0x2000
659 #define MB_TYPE_P0L1 0x4000
660 #define MB_TYPE_P1L1 0x8000
661 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
662 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
663 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
664 #define MB_TYPE_QUANT 0x00010000
665 #define MB_TYPE_CBP 0x00020000
666 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
667
668 /**
669 * Pan Scan area.
670 * This specifies the area which should be displayed.
671 * Note there may be multiple such areas for one frame.
672 */
673 typedef struct AVPanScan{
674 /**
675 * id
676 * - encoding: Set by user.
677 * - decoding: Set by libavcodec.
678 */
679 int id;
680
681 /**
682 * width and height in 1/16 pel
683 * - encoding: Set by user.
684 * - decoding: Set by libavcodec.
685 */
686 int width;
687 int height;
688
689 /**
690 * position of the top left corner in 1/16 pel for up to 3 fields/frames
691 * - encoding: Set by user.
692 * - decoding: Set by libavcodec.
693 */
694 int16_t position[3][2];
695 }AVPanScan;
696
697 #define FF_COMMON_FRAME \
698 /**\
699 * pointer to the picture planes.\
700 * This might be different from the first allocated byte\
701 * - encoding: \
702 * - decoding: \
703 */\
704 uint8_t *data[4];\
705 int linesize[4];\
706 /**\
707 * pointer to the first allocated byte of the picture. Can be used in get_buffer/release_buffer.\
708 * This isn't used by libavcodec unless the default get/release_buffer() is used.\
709 * - encoding: \
710 * - decoding: \
711 */\
712 uint8_t *base[4];\
713 /**\
714 * 1 -> keyframe, 0-> not\
715 * - encoding: Set by libavcodec.\
716 * - decoding: Set by libavcodec.\
717 */\
718 int key_frame;\
719 \
720 /**\
721 * Picture type of the frame, see ?_TYPE below.\
722 * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
723 * - decoding: Set by libavcodec.\
724 */\
725 int pict_type;\
726 \
727 /**\
728 * presentation timestamp in time_base units (time when frame should be shown to user)\
729 * If AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed.\
730 * - encoding: MUST be set by user.\
731 * - decoding: Set by libavcodec.\
732 */\
733 int64_t pts;\
734 \
735 /**\
736 * picture number in bitstream order\
737 * - encoding: set by\
738 * - decoding: Set by libavcodec.\
739 */\
740 int coded_picture_number;\
741 /**\
742 * picture number in display order\
743 * - encoding: set by\
744 * - decoding: Set by libavcodec.\
745 */\
746 int display_picture_number;\
747 \
748 /**\
749 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
750 * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
751 * - decoding: Set by libavcodec.\
752 */\
753 int quality; \
754 \
755 /**\
756 * buffer age (1->was last buffer and dint change, 2->..., ...).\
757 * Set to INT_MAX if the buffer has not been used yet.\
758 * - encoding: unused\
759 * - decoding: MUST be set by get_buffer().\
760 */\
761 int age;\
762 \
763 /**\
764 * is this picture used as reference\
765 * The values for this are the same as the MpegEncContext.picture_structure\
766 * variable, that is 1->top field, 2->bottom field, 3->frame/both fields.\
767 * Set to 4 for delayed, non-reference frames.\
768 * - encoding: unused\
769 * - decoding: Set by libavcodec. (before get_buffer() call)).\
770 */\
771 int reference;\
772 \
773 /**\
774 * QP table\
775 * - encoding: unused\
776 * - decoding: Set by libavcodec.\
777 */\
778 int8_t *qscale_table;\
779 /**\
780 * QP store stride\
781 * - encoding: unused\
782 * - decoding: Set by libavcodec.\
783 */\
784 int qstride;\
785 \
786 /**\
787 * mbskip_table[mb]>=1 if MB didn't change\
788 * stride= mb_width = (width+15)>>4\
789 * - encoding: unused\
790 * - decoding: Set by libavcodec.\
791 */\
792 uint8_t *mbskip_table;\
793 \
794 /**\
795 * motion vector table\
796 * @code\
797 * example:\
798 * int mv_sample_log2= 4 - motion_subsample_log2;\
799 * int mb_width= (width+15)>>4;\
800 * int mv_stride= (mb_width << mv_sample_log2) + 1;\
801 * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
802 * @endcode\
803 * - encoding: Set by user.\
804 * - decoding: Set by libavcodec.\
805 */\
806 int16_t (*motion_val[2])[2];\
807 \
808 /**\
809 * macroblock type table\
810 * mb_type_base + mb_width + 2\
811 * - encoding: Set by user.\
812 * - decoding: Set by libavcodec.\
813 */\
814 uint32_t *mb_type;\
815 \
816 /**\
817 * log2 of the size of the block which a single vector in motion_val represents: \
818 * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
819 * - encoding: unused\
820 * - decoding: Set by libavcodec.\
821 */\
822 uint8_t motion_subsample_log2;\
823 \
824 /**\
825 * for some private data of the user\
826 * - encoding: unused\
827 * - decoding: Set by user.\
828 */\
829 void *opaque;\
830 \
831 /**\
832 * error\
833 * - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR.\
834 * - decoding: unused\
835 */\
836 uint64_t error[4];\
837 \
838 /**\
839 * type of the buffer (to keep track of who has to deallocate data[*])\
840 * - encoding: Set by the one who allocates it.\
841 * - decoding: Set by the one who allocates it.\
842 * Note: User allocated (direct rendering) & internal buffers cannot coexist currently.\
843 */\
844 int type;\
845 \
846 /**\
847 * When decoding, this signals how much the picture must be delayed.\
848 * extra_delay = repeat_pict / (2*fps)\
849 * - encoding: unused\
850 * - decoding: Set by libavcodec.\
851 */\
852 int repeat_pict;\
853 \
854 /**\
855 * \
856 */\
857 int qscale_type;\
858 \
859 /**\
860 * The content of the picture is interlaced.\
861 * - encoding: Set by user.\
862 * - decoding: Set by libavcodec. (default 0)\
863 */\
864 int interlaced_frame;\
865 \
866 /**\
867 * If the content is interlaced, is top field displayed first.\
868 * - encoding: Set by user.\
869 * - decoding: Set by libavcodec.\
870 */\
871 int top_field_first;\
872 \
873 /**\
874 * Pan scan.\
875 * - encoding: Set by user.\
876 * - decoding: Set by libavcodec.\
877 */\
878 AVPanScan *pan_scan;\
879 \
880 /**\
881 * Tell user application that palette has changed from previous frame.\
882 * - encoding: ??? (no palette-enabled encoder yet)\
883 * - decoding: Set by libavcodec. (default 0).\
884 */\
885 int palette_has_changed;\
886 \
887 /**\
888 * codec suggestion on buffer type if != 0\
889 * - encoding: unused\
890 * - decoding: Set by libavcodec. (before get_buffer() call)).\
891 */\
892 int buffer_hints;\
893 \
894 /**\
895 * DCT coefficients\
896 * - encoding: unused\
897 * - decoding: Set by libavcodec.\
898 */\
899 short *dct_coeff;\
900 \
901 /**\
902 * motion reference frame index\
903 * the order in which these are stored can depend on the codec.\
904 * - encoding: Set by user.\
905 * - decoding: Set by libavcodec.\
906 */\
907 int8_t *ref_index[2];\
908 \
909 /**\
910 * reordered opaque 64bit number (generally a PTS) from AVCodecContext.reordered_opaque\
911 * output in AVFrame.reordered_opaque\
912 * - encoding: unused\
913 * - decoding: Read by user.\
914 */\
915 int64_t reordered_opaque;\
916 \
917 /**\
918 * hardware accelerator private data (FFmpeg allocated)\
919 * - encoding: unused\
920 * - decoding: Set by libavcodec\
921 */\
922 void *hwaccel_picture_private;\
923
924
925 #define FF_QSCALE_TYPE_MPEG1 0
926 #define FF_QSCALE_TYPE_MPEG2 1
927 #define FF_QSCALE_TYPE_H264 2
928 #define FF_QSCALE_TYPE_VP56 3
929
930 #define FF_BUFFER_TYPE_INTERNAL 1
931 #define FF_BUFFER_TYPE_USER 2 ///< direct rendering buffers (image is (de)allocated by user)
932 #define FF_BUFFER_TYPE_SHARED 4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared.
933 #define FF_BUFFER_TYPE_COPY 8 ///< Just a (modified) copy of some other buffer, don't deallocate anything.
934
935
936 #define FF_I_TYPE 1 ///< Intra
937 #define FF_P_TYPE 2 ///< Predicted
938 #define FF_B_TYPE 3 ///< Bi-dir predicted
939 #define FF_S_TYPE 4 ///< S(GMC)-VOP MPEG4
940 #define FF_SI_TYPE 5 ///< Switching Intra
941 #define FF_SP_TYPE 6 ///< Switching Predicted
942 #define FF_BI_TYPE 7
943
944 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore).
945 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer.
946 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content.
947 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update).
948
949 typedef struct AVPacket {
950 /**
951 * Presentation timestamp in AVStream->time_base units; the time at which
952 * the decompressed packet will be presented to the user.
953 * Can be AV_NOPTS_VALUE if it is not stored in the file.
954 * pts MUST be larger or equal to dts as presentation cannot happen before
955 * decompression, unless one wants to view hex dumps. Some formats misuse
956 * the terms dts and pts/cts to mean something different. Such timestamps
957 * must be converted to true pts/dts before they are stored in AVPacket.
958 */
959 int64_t pts;
960 /**
961 * Decompression timestamp in AVStream->time_base units; the time at which
962 * the packet is decompressed.
963 * Can be AV_NOPTS_VALUE if it is not stored in the file.
964 */
965 int64_t dts;
966 uint8_t *data;
967 int size;
968 int stream_index;
969 int flags;
970 /**
971 * Duration of this packet in AVStream->time_base units, 0 if unknown.
972 * Equals next_pts - this_pts in presentation order.
973 */
974 int duration;
975 void (*destruct)(struct AVPacket *);
976 void *priv;
977 int64_t pos; ///< byte position in stream, -1 if unknown
978
979 /**
980 * Time difference in AVStream->time_base units from the pts of this
981 * packet to the point at which the output from the decoder has converged
982 * independent from the availability of previous frames. That is, the
983 * frames are virtually identical no matter if decoding started from
984 * the very first frame or from this keyframe.
985 * Is AV_NOPTS_VALUE if unknown.
986 * This field is not the display duration of the current packet.
987 *
988 * The purpose of this field is to allow seeking in streams that have no
989 * keyframes in the conventional sense. It corresponds to the
990 * recovery point SEI in H.264 and match_time_delta in NUT. It is also
991 * essential for some types of subtitle streams to ensure that all
992 * subtitles are correctly displayed after seeking.
993 */
994 int64_t convergence_duration;
995 } AVPacket;
996 #define AV_PKT_FLAG_KEY 0x0001
997 #if LIBAVCODEC_VERSION_MAJOR < 53
998 #define PKT_FLAG_KEY AV_PKT_FLAG_KEY
999 #endif
1000
1001 /**
1002 * Audio Video Frame.
1003 * New fields can be added to the end of FF_COMMON_FRAME with minor version
1004 * bumps.
1005 * Removal, reordering and changes to existing fields require a major
1006 * version bump. No fields should be added into AVFrame before or after
1007 * FF_COMMON_FRAME!
1008 * sizeof(AVFrame) must not be used outside libav*.
1009 */
1010 typedef struct AVFrame {
1011 FF_COMMON_FRAME
1012 } AVFrame;
1013
1014 /**
1015 * main external API structure.
1016 * New fields can be added to the end with minor version bumps.
1017 * Removal, reordering and changes to existing fields require a major
1018 * version bump.
1019 * sizeof(AVCodecContext) must not be used outside libav*.
1020 */
1021 typedef struct AVCodecContext {
1022 /**
1023 * information on struct for av_log
1024 * - set by avcodec_alloc_context
1025 */
1026 const AVClass *av_class;
1027 /**
1028 * the average bitrate
1029 * - encoding: Set by user; unused for constant quantizer encoding.
1030 * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.
1031 */
1032 int bit_rate;
1033
1034 /**
1035 * number of bits the bitstream is allowed to diverge from the reference.
1036 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
1037 * - encoding: Set by user; unused for constant quantizer encoding.
1038 * - decoding: unused
1039 */
1040 int bit_rate_tolerance;
1041
1042 /**
1043 * CODEC_FLAG_*.
1044 * - encoding: Set by user.
1045 * - decoding: Set by user.
1046 */
1047 int flags;
1048
1049 /**
1050 * Some codecs need additional format info. It is stored here.
1051 * If any muxer uses this then ALL demuxers/parsers AND encoders for the
1052 * specific codec MUST set it correctly otherwise stream copy breaks.
1053 * In general use of this field by muxers is not recommanded.
1054 * - encoding: Set by libavcodec.
1055 * - decoding: Set by libavcodec. (FIXME: Is this OK?)
1056 */
1057 int sub_id;
1058
1059 /**
1060 * Motion estimation algorithm used for video coding.
1061 * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
1062 * 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific]
1063 * - encoding: MUST be set by user.
1064 * - decoding: unused
1065 */
1066 int me_method;
1067
1068 /**
1069 * some codecs need / can use extradata like Huffman tables.
1070 * mjpeg: Huffman tables
1071 * rv10: additional flags
1072 * mpeg4: global headers (they can be in the bitstream or here)
1073 * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
1074 * than extradata_size to avoid prolems if it is read with the bitstream reader.
1075 * The bytewise contents of extradata must not depend on the architecture or CPU endianness.
1076 * - encoding: Set/allocated/freed by libavcodec.
1077 * - decoding: Set/allocated/freed by user.
1078 */
1079 uint8_t *extradata;
1080 int extradata_size;
1081
1082 /**
1083 * This is the fundamental unit of time (in seconds) in terms
1084 * of which frame timestamps are represented. For fixed-fps content,
1085 * timebase should be 1/framerate and timestamp increments should be
1086 * identically 1.
1087 * - encoding: MUST be set by user.
1088 * - decoding: Set by libavcodec.
1089 */
1090 AVRational time_base;
1091
1092 /* video only */
1093 /**
1094 * picture width / height.
1095 * - encoding: MUST be set by user.
1096 * - decoding: Set by libavcodec.
1097 * Note: For compatibility it is possible to set this instead of
1098 * coded_width/height before decoding.
1099 */
1100 int width, height;
1101
1102 #define FF_ASPECT_EXTENDED 15
1103
1104 /**
1105 * the number of pictures in a group of pictures, or 0 for intra_only
1106 * - encoding: Set by user.
1107 * - decoding: unused
1108 */
1109 int gop_size;
1110
1111 /**
1112 * Pixel format, see PIX_FMT_xxx.
1113 * - encoding: Set by user.
1114 * - decoding: Set by libavcodec.
1115 */
1116 enum PixelFormat pix_fmt;
1117
1118 /**
1119 * Frame rate emulation. If not zero, the lower layer (i.e. format handler)
1120 * has to read frames at native frame rate.
1121 * - encoding: Set by user.
1122 * - decoding: unused
1123 */
1124 int rate_emu;
1125
1126 /**
1127 * If non NULL, 'draw_horiz_band' is called by the libavcodec
1128 * decoder to draw a horizontal band. It improves cache usage. Not
1129 * all codecs can do that. You must check the codec capabilities
1130 * beforehand.
1131 * The function is also used by hardware acceleration APIs.
1132 * It is called at least once during frame decoding to pass
1133 * the data needed for hardware render.
1134 * In that mode instead of pixel data, AVFrame points to
1135 * a structure specific to the acceleration API. The application
1136 * reads the structure and can change some fields to indicate progress
1137 * or mark state.
1138 * - encoding: unused
1139 * - decoding: Set by user.
1140 * @param height the height of the slice
1141 * @param y the y position of the slice
1142 * @param type 1->top field, 2->bottom field, 3->frame
1143 * @param offset offset into the AVFrame.data from which the slice should be read
1144 */
1145 void (*draw_horiz_band)(struct AVCodecContext *s,
1146 const AVFrame *src, int offset[4],
1147 int y, int type, int height);
1148
1149 /* audio only */
1150 int sample_rate; ///< samples per second
1151 int channels; ///< number of audio channels
1152
1153 /**
1154 * audio sample format
1155 * - encoding: Set by user.
1156 * - decoding: Set by libavcodec.
1157 */
1158 enum SampleFormat sample_fmt; ///< sample format
1159
1160 /* The following data should not be initialized. */
1161 /**
1162 * Samples per packet, initialized when calling 'init'.
1163 */
1164 int frame_size;
1165 int frame_number; ///< audio or video frame number
1166 #if LIBAVCODEC_VERSION_MAJOR < 53
1167 int real_pict_num; ///< Returns the real picture number of previous encoded frame.
1168 #endif
1169
1170 /**
1171 * Number of frames the decoded output will be delayed relative to
1172 * the encoded input.
1173 * - encoding: Set by libavcodec.
1174 * - decoding: unused
1175 */
1176 int delay;
1177
1178 /* - encoding parameters */
1179 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
1180 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
1181
1182 /**
1183 * minimum quantizer
1184 * - encoding: Set by user.
1185 * - decoding: unused
1186 */
1187 int qmin;
1188
1189 /**
1190 * maximum quantizer
1191 * - encoding: Set by user.
1192 * - decoding: unused
1193 */
1194 int qmax;
1195
1196 /**
1197 * maximum quantizer difference between frames
1198 * - encoding: Set by user.
1199 * - decoding: unused
1200 */
1201 int max_qdiff;
1202
1203 /**
1204 * maximum number of B-frames between non-B-frames
1205 * Note: The output will be delayed by max_b_frames+1 relative to the input.
1206 * - encoding: Set by user.
1207 * - decoding: unused
1208 */
1209 int max_b_frames;
1210
1211 /**
1212 * qscale factor between IP and B-frames
1213 * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
1214 * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1215 * - encoding: Set by user.
1216 * - decoding: unused
1217 */
1218 float b_quant_factor;
1219
1220 /** obsolete FIXME remove */
1221 int rc_strategy;
1222 #define FF_RC_STRATEGY_XVID 1
1223
1224 int b_frame_strategy;
1225
1226 /**
1227 * hurry up amount
1228 * - encoding: unused
1229 * - decoding: Set by user. 1-> Skip B-frames, 2-> Skip IDCT/dequant too, 5-> Skip everything except header
1230 * @deprecated Deprecated in favor of skip_idct and skip_frame.
1231 */
1232 int hurry_up;
1233
1234 struct AVCodec *codec;
1235
1236 void *priv_data;
1237
1238 int rtp_payload_size; /* The size of the RTP payload: the coder will */
1239 /* do its best to deliver a chunk with size */
1240 /* below rtp_payload_size, the chunk will start */
1241 /* with a start code on some codecs like H.263. */
1242 /* This doesn't take account of any particular */
1243 /* headers inside the transmitted RTP payload. */
1244
1245
1246 /* The RTP callback: This function is called */
1247 /* every time the encoder has a packet to send. */
1248 /* It depends on the encoder if the data starts */
1249 /* with a Start Code (it should). H.263 does. */
1250 /* mb_nb contains the number of macroblocks */
1251 /* encoded in the RTP payload. */
1252 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
1253
1254 /* statistics, used for 2-pass encoding */
1255 int mv_bits;
1256 int header_bits;
1257 int i_tex_bits;
1258 int p_tex_bits;
1259 int i_count;
1260 int p_count;
1261 int skip_count;
1262 int misc_bits;
1263
1264 /**
1265 * number of bits used for the previously encoded frame
1266 * - encoding: Set by libavcodec.
1267 * - decoding: unused
1268 */
1269 int frame_bits;
1270
1271 /**
1272 * Private data of the user, can be used to carry app specific stuff.
1273 * - encoding: Set by user.
1274 * - decoding: Set by user.
1275 */
1276 void *opaque;
1277
1278 char codec_name[32];
1279 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
1280 enum CodecID codec_id; /* see CODEC_ID_xxx */
1281
1282 /**
1283 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1284 * This is used to work around some encoder bugs.
1285 * A demuxer should set this to what is stored in the field used to identify the codec.
1286 * If there are multiple such fields in a container then the demuxer should choose the one
1287 * which maximizes the information about the used codec.
1288 * If the codec tag field in a container is larger then 32 bits then the demuxer should
1289 * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
1290 * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
1291 * first.
1292 * - encoding: Set by user, if not then the default based on codec_id will be used.
1293 * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1294 */
1295 unsigned int codec_tag;
1296
1297 /**
1298 * Work around bugs in encoders which sometimes cannot be detected automatically.
1299 * - encoding: Set by user
1300 * - decoding: Set by user
1301 */
1302 int workaround_bugs;
1303 #define FF_BUG_AUTODETECT 1 ///< autodetection
1304 #define FF_BUG_OLD_MSMPEG4 2
1305 #define FF_BUG_XVID_ILACE 4
1306 #define FF_BUG_UMP4 8
1307 #define FF_BUG_NO_PADDING 16
1308 #define FF_BUG_AMV 32
1309 #define FF_BUG_AC_VLC 0 ///< Will be removed, libavcodec can now handle these non-compliant files by default.
1310 #define FF_BUG_QPEL_CHROMA 64
1311 #define FF_BUG_STD_QPEL 128
1312 #define FF_BUG_QPEL_CHROMA2 256
1313 #define FF_BUG_DIRECT_BLOCKSIZE 512
1314 #define FF_BUG_EDGE 1024
1315 #define FF_BUG_HPEL_CHROMA 2048
1316 #define FF_BUG_DC_CLIP 4096
1317 #define FF_BUG_MS 8192 ///< Work around various bugs in Microsoft's broken decoders.
1318 #define FF_BUG_TRUNCATED 16384
1319 //#define FF_BUG_FAKE_SCALABILITY 16 //Autodetection should work 100%.
1320
1321 /**
1322 * luma single coefficient elimination threshold
1323 * - encoding: Set by user.
1324 * - decoding: unused
1325 */
1326 int luma_elim_threshold;
1327
1328 /**
1329 * chroma single coeff elimination threshold
1330 * - encoding: Set by user.
1331 * - decoding: unused
1332 */
1333 int chroma_elim_threshold;
1334
1335 /**
1336 * strictly follow the standard (MPEG4, ...).
1337 * - encoding: Set by user.
1338 * - decoding: Set by user.
1339 * Setting this to STRICT or higher means the encoder and decoder will
1340 * generally do stupid things. While setting it to inofficial or lower
1341 * will mean the encoder might use things that are not supported by all
1342 * spec compliant decoders. Decoders make no difference between normal,
1343 * inofficial and experimental, that is they always try to decode things
1344 * when they can unless they are explicitly asked to behave stupid
1345 * (=strictly conform to the specs)
1346 */
1347 int strict_std_compliance;
1348 #define FF_COMPLIANCE_VERY_STRICT 2 ///< Strictly conform to a older more strict version of the spec or reference software.
1349 #define FF_COMPLIANCE_STRICT 1 ///< Strictly conform to all the things in the spec no matter what consequences.
1350 #define FF_COMPLIANCE_NORMAL 0
1351 #define FF_COMPLIANCE_INOFFICIAL -1 ///< Allow inofficial extensions.
1352 #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
1353
1354 /**
1355 * qscale offset between IP and B-frames
1356 * - encoding: Set by user.
1357 * - decoding: unused
1358 */
1359 float b_quant_offset;
1360
1361 /**
1362 * Error recognization; higher values will detect more errors but may
1363 * misdetect some more or less valid parts as errors.
1364 * - encoding: unused
1365 * - decoding: Set by user.
1366 */
1367 int error_recognition;
1368 #define FF_ER_CAREFUL 1
1369 #define FF_ER_COMPLIANT 2
1370 #define FF_ER_AGGRESSIVE 3
1371 #define FF_ER_VERY_AGGRESSIVE 4
1372
1373 /**
1374 * Called at the beginning of each frame to get a buffer for it.
1375 * If pic.reference is set then the frame will be read later by libavcodec.
1376 * avcodec_align_dimensions2() should be used to find the required width and
1377 * height, as they normally need to be rounded up to the next multiple of 16.
1378 * if CODEC_CAP_DR1 is not set then get_buffer() must call
1379 * avcodec_default_get_buffer() instead of providing buffers allocated by
1380 * some other means.
1381 * - encoding: unused
1382 * - decoding: Set by libavcodec., user can override.
1383 */
1384 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1385
1386 /**
1387 * Called to release buffers which were allocated with get_buffer.
1388 * A released buffer can be reused in get_buffer().
1389 * pic.data[*] must be set to NULL.
1390 * - encoding: unused
1391 * - decoding: Set by libavcodec., user can override.
1392 */
1393 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1394
1395 /**
1396 * Size of the frame reordering buffer in the decoder.
1397 * For MPEG-2 it is 1 IPB or 0 low delay IP.
1398 * - encoding: Set by libavcodec.
1399 * - decoding: Set by libavcodec.
1400 */
1401 int has_b_frames;
1402
1403 /**
1404 * number of bytes per packet if constant and known or 0
1405 * Used by some WAV based audio codecs.
1406 */
1407 int block_align;
1408
1409 int parse_only; /* - decoding only: If true, only parsing is done
1410 (function avcodec_parse_frame()). The frame
1411 data is returned. Only MPEG codecs support this now. */
1412
1413 /**
1414 * 0-> h263 quant 1-> mpeg quant
1415 * - encoding: Set by user.
1416 * - decoding: unused
1417 */
1418 int mpeg_quant;
1419
1420 /**
1421 * pass1 encoding statistics output buffer
1422 * - encoding: Set by libavcodec.
1423 * - decoding: unused
1424 */
1425 char *stats_out;
1426
1427 /**
1428 * pass2 encoding statistics input buffer
1429 * Concatenated stuff from stats_out of pass1 should be placed here.
1430 * - encoding: Allocated/set/freed by user.
1431 * - decoding: unused
1432 */
1433 char *stats_in;
1434
1435 /**
1436 * ratecontrol qmin qmax limiting method
1437 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
1438 * - encoding: Set by user.
1439 * - decoding: unused
1440 */
1441 float rc_qsquish;
1442
1443 float rc_qmod_amp;
1444 int rc_qmod_freq;
1445
1446 /**
1447 * ratecontrol override, see RcOverride
1448 * - encoding: Allocated/set/freed by user.
1449 * - decoding: unused
1450 */
1451 RcOverride *rc_override;
1452 int rc_override_count;
1453
1454 /**
1455 * rate control equation
1456 * - encoding: Set by user
1457 * - decoding: unused
1458 */
1459 const char *rc_eq;
1460
1461 /**
1462 * maximum bitrate
1463 * - encoding: Set by user.
1464 * - decoding: unused
1465 */
1466 int rc_max_rate;
1467
1468 /**
1469 * minimum bitrate
1470 * - encoding: Set by user.
1471 * - decoding: unused
1472 */
1473 int rc_min_rate;
1474
1475 /**
1476 * decoder bitstream buffer size
1477 * - encoding: Set by user.
1478 * - decoding: unused
1479 */
1480 int rc_buffer_size;
1481 float rc_buffer_aggressivity;
1482
1483 /**
1484 * qscale factor between P and I-frames
1485 * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
1486 * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1487 * - encoding: Set by user.
1488 * - decoding: unused
1489 */
1490 float i_quant_factor;
1491
1492 /**
1493 * qscale offset between P and I-frames
1494 * - encoding: Set by user.
1495 * - decoding: unused
1496 */
1497 float i_quant_offset;
1498
1499 /**
1500 * initial complexity for pass1 ratecontrol
1501 * - encoding: Set by user.
1502 * - decoding: unused
1503 */
1504 float rc_initial_cplx;
1505
1506 /**
1507 * DCT algorithm, see FF_DCT_* below
1508 * - encoding: Set by user.
1509 * - decoding: unused
1510 */
1511 int dct_algo;
1512 #define FF_DCT_AUTO 0
1513 #define FF_DCT_FASTINT 1
1514 #define FF_DCT_INT 2
1515 #define FF_DCT_MMX 3
1516 #define FF_DCT_MLIB 4
1517 #define FF_DCT_ALTIVEC 5
1518 #define FF_DCT_FAAN 6
1519
1520 /**
1521 * luminance masking (0-> disabled)
1522 * - encoding: Set by user.
1523 * - decoding: unused
1524 */
1525 float lumi_masking;
1526
1527 /**
1528 * temporary complexity masking (0-> disabled)
1529 * - encoding: Set by user.
1530 * - decoding: unused
1531 */
1532 float temporal_cplx_masking;
1533
1534 /**
1535 * spatial complexity masking (0-> disabled)
1536 * - encoding: Set by user.
1537 * - decoding: unused
1538 */
1539 float spatial_cplx_masking;
1540
1541 /**
1542 * p block masking (0-> disabled)
1543 * - encoding: Set by user.
1544 * - decoding: unused
1545 */
1546 float p_masking;
1547
1548 /**
1549 * darkness masking (0-> disabled)
1550 * - encoding: Set by user.
1551 * - decoding: unused
1552 */
1553 float dark_masking;
1554
1555 /**
1556 * IDCT algorithm, see FF_IDCT_* below.
1557 * - encoding: Set by user.
1558 * - decoding: Set by user.
1559 */
1560 int idct_algo;
1561 #define FF_IDCT_AUTO 0
1562 #define FF_IDCT_INT 1
1563 #define FF_IDCT_SIMPLE 2
1564 #define FF_IDCT_SIMPLEMMX 3
1565 #define FF_IDCT_LIBMPEG2MMX 4
1566 #define FF_IDCT_PS2 5
1567 #define FF_IDCT_MLIB 6
1568 #define FF_IDCT_ARM 7
1569 #define FF_IDCT_ALTIVEC 8
1570 #define FF_IDCT_SH4 9
1571 #define FF_IDCT_SIMPLEARM 10
1572 #define FF_IDCT_H264 11
1573 #define FF_IDCT_VP3 12
1574 #define FF_IDCT_IPP 13
1575 #define FF_IDCT_XVIDMMX 14
1576 #define FF_IDCT_CAVS 15
1577 #define FF_IDCT_SIMPLEARMV5TE 16
1578 #define FF_IDCT_SIMPLEARMV6 17
1579 #define FF_IDCT_SIMPLEVIS 18
1580 #define FF_IDCT_WMV2 19
1581 #define FF_IDCT_FAAN 20
1582 #define FF_IDCT_EA 21
1583 #define FF_IDCT_SIMPLENEON 22
1584 #define FF_IDCT_SIMPLEALPHA 23
1585 #define FF_IDCT_BINK 24
1586
1587 /**
1588 * slice count
1589 * - encoding: Set by libavcodec.
1590 * - decoding: Set by user (or 0).
1591 */
1592 int slice_count;
1593 /**
1594 * slice offsets in the frame in bytes
1595 * - encoding: Set/allocated by libavcodec.
1596 * - decoding: Set/allocated by user (or NULL).
1597 */
1598 int *slice_offset;
1599
1600 /**
1601 * error concealment flags
1602 * - encoding: unused
1603 * - decoding: Set by user.
1604 */
1605 int error_concealment;
1606 #define FF_EC_GUESS_MVS 1
1607 #define FF_EC_DEBLOCK 2
1608
1609 /**
1610 * dsp_mask could be add used to disable unwanted CPU features
1611 * CPU features (i.e. MMX, SSE. ...)
1612 *
1613 * With the FORCE flag you may instead enable given CPU features.
1614 * (Dangerous: Usable in case of misdetection, improper usage however will
1615 * result into program crash.)
1616 */
1617 unsigned dsp_mask;
1618 #define FF_MM_FORCE 0x80000000 /* Force usage of selected flags (OR) */
1619 /* lower 16 bits - CPU features */
1620 #define FF_MM_MMX 0x0001 ///< standard MMX
1621 #define FF_MM_3DNOW 0x0004 ///< AMD 3DNOW
1622 #if LIBAVCODEC_VERSION_MAJOR < 53
1623 #define FF_MM_MMXEXT 0x0002 ///< SSE integer functions or AMD MMX ext
1624 #endif
1625 #define FF_MM_MMX2 0x0002 ///< SSE integer functions or AMD MMX ext
1626 #define FF_MM_SSE 0x0008 ///< SSE functions
1627 #define FF_MM_SSE2 0x0010 ///< PIV SSE2 functions
1628 #define FF_MM_3DNOWEXT 0x0020 ///< AMD 3DNowExt
1629 #define FF_MM_SSE3 0x0040 ///< Prescott SSE3 functions
1630 #define FF_MM_SSSE3 0x0080 ///< Conroe SSSE3 functions
1631 #define FF_MM_SSE4 0x0100 ///< Penryn SSE4.1 functions
1632 #define FF_MM_SSE42 0x0200 ///< Nehalem SSE4.2 functions
1633 #define FF_MM_IWMMXT 0x0100 ///< XScale IWMMXT
1634 #define FF_MM_ALTIVEC 0x0001 ///< standard AltiVec
1635
1636 /**
1637 * bits per sample/pixel from the demuxer (needed for huffyuv).
1638 * - encoding: Set by libavcodec.
1639 * - decoding: Set by user.
1640 */
1641 int bits_per_coded_sample;
1642
1643 /**
1644 * prediction method (needed for huffyuv)
1645 * - encoding: Set by user.
1646 * - decoding: unused
1647 */
1648 int prediction_method;
1649 #define FF_PRED_LEFT 0
1650 #define FF_PRED_PLANE 1
1651 #define FF_PRED_MEDIAN 2
1652
1653 /**
1654 * sample aspect ratio (0 if unknown)
1655 * That is the width of a pixel divided by the height of the pixel.
1656 * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
1657 * - encoding: Set by user.
1658 * - decoding: Set by libavcodec.
1659 */
1660 AVRational sample_aspect_ratio;
1661
1662 /**
1663 * the picture in the bitstream
1664 * - encoding: Set by libavcodec.
1665 * - decoding: Set by libavcodec.
1666 */
1667 AVFrame *coded_frame;
1668
1669 /**
1670 * debug
1671 * - encoding: Set by user.
1672 * - decoding: Set by user.
1673 */
1674 int debug;
1675 #define FF_DEBUG_PICT_INFO 1
1676 #define FF_DEBUG_RC 2
1677 #define FF_DEBUG_BITSTREAM 4
1678 #define FF_DEBUG_MB_TYPE 8
1679 #define FF_DEBUG_QP 16
1680 #define FF_DEBUG_MV 32
1681 #define FF_DEBUG_DCT_COEFF 0x00000040
1682 #define FF_DEBUG_SKIP 0x00000080
1683 #define FF_DEBUG_STARTCODE 0x00000100
1684 #define FF_DEBUG_PTS 0x00000200
1685 #define FF_DEBUG_ER 0x00000400
1686 #define FF_DEBUG_MMCO 0x00000800
1687 #define FF_DEBUG_BUGS 0x00001000
1688 #define FF_DEBUG_VIS_QP 0x00002000
1689 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1690 #define FF_DEBUG_BUFFERS 0x00008000
1691
1692 /**
1693 * debug
1694 * - encoding: Set by user.
1695 * - decoding: Set by user.
1696 */
1697 int debug_mv;
1698 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1699 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1700 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1701
1702 /**
1703 * error
1704 * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
1705 * - decoding: unused
1706 */
1707 uint64_t error[4];
1708
1709 /**
1710 * minimum MB quantizer
1711 * - encoding: unused
1712 * - decoding: unused
1713 */
1714 int mb_qmin;
1715
1716 /**
1717 * maximum MB quantizer
1718 * - encoding: unused
1719 * - decoding: unused
1720 */
1721 int mb_qmax;
1722
1723 /**
1724 * motion estimation comparison function
1725 * - encoding: Set by user.
1726 * - decoding: unused
1727 */
1728 int me_cmp;
1729 /**
1730 * subpixel motion estimation comparison function
1731 * - encoding: Set by user.
1732 * - decoding: unused
1733 */
1734 int me_sub_cmp;
1735 /**
1736 * macroblock comparison function (not supported yet)
1737 * - encoding: Set by user.
1738 * - decoding: unused
1739 */
1740 int mb_cmp;
1741 /**
1742 * interlaced DCT comparison function
1743 * - encoding: Set by user.
1744 * - decoding: unused
1745 */
1746 int ildct_cmp;
1747 #define FF_CMP_SAD 0
1748 #define FF_CMP_SSE 1
1749 #define FF_CMP_SATD 2
1750 #define FF_CMP_DCT 3
1751 #define FF_CMP_PSNR 4
1752 #define FF_CMP_BIT 5
1753 #define FF_CMP_RD 6
1754 #define FF_CMP_ZERO 7
1755 #define FF_CMP_VSAD 8
1756 #define FF_CMP_VSSE 9
1757 #define FF_CMP_NSSE 10
1758 #define FF_CMP_W53 11
1759 #define FF_CMP_W97 12
1760 #define FF_CMP_DCTMAX 13
1761 #define FF_CMP_DCT264 14
1762 #define FF_CMP_CHROMA 256
1763
1764 /**
1765 * ME diamond size & shape
1766 * - encoding: Set by user.
1767 * - decoding: unused
1768 */
1769 int dia_size;
1770
1771 /**
1772 * amount of previous MV predictors (2a+1 x 2a+1 square)
1773 * - encoding: Set by user.
1774 * - decoding: unused
1775 */
1776 int last_predictor_count;
1777
1778 /**
1779 * prepass for motion estimation
1780 * - encoding: Set by user.
1781 * - decoding: unused
1782 */
1783 int pre_me;
1784
1785 /**
1786 * motion estimation prepass comparison function
1787 * - encoding: Set by user.
1788 * - decoding: unused
1789 */
1790 int me_pre_cmp;
1791
1792 /**
1793 * ME prepass diamond size & shape
1794 * - encoding: Set by user.
1795 * - decoding: unused
1796 */
1797 int pre_dia_size;
1798
1799 /**
1800 * subpel ME quality
1801 * - encoding: Set by user.
1802 * - decoding: unused
1803 */
1804 int me_subpel_quality;
1805
1806 /**
1807 * callback to negotiate the pixelFormat
1808 * @param fmt is the list of formats which are supported by the codec,
1809 * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
1810 * The first is always the native one.
1811 * @return the chosen format
1812 * - encoding: unused
1813 * - decoding: Set by user, if not set the native format will be chosen.
1814 */
1815 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1816
1817 /**
1818 * DTG active format information (additional aspect ratio
1819 * information only used in DVB MPEG-2 transport streams)
1820 * 0 if not set.
1821 *
1822 * - encoding: unused
1823 * - decoding: Set by decoder.
1824 */
1825 int dtg_active_format;
1826 #define FF_DTG_AFD_SAME 8
1827 #define FF_DTG_AFD_4_3 9
1828 #define FF_DTG_AFD_16_9 10
1829 #define FF_DTG_AFD_14_9 11
1830 #define FF_DTG_AFD_4_3_SP_14_9 13
1831 #define FF_DTG_AFD_16_9_SP_14_9 14
1832 #define FF_DTG_AFD_SP_4_3 15
1833
1834 /**
1835 * maximum motion estimation search range in subpel units
1836 * If 0 then no limit.
1837 *
1838 * - encoding: Set by user.
1839 * - decoding: unused
1840 */
1841 int me_range;
1842
1843 /**
1844 * intra quantizer bias
1845 * - encoding: Set by user.
1846 * - decoding: unused
1847 */
1848 int intra_quant_bias;
1849 #define FF_DEFAULT_QUANT_BIAS 999999
1850
1851 /**
1852 * inter quantizer bias
1853 * - encoding: Set by user.
1854 * - decoding: unused
1855 */
1856 int inter_quant_bias;
1857
1858 /**
1859 * color table ID
1860 * - encoding: unused
1861 * - decoding: Which clrtable should be used for 8bit RGB images.
1862 * Tables have to be stored somewhere. FIXME
1863 */
1864 int color_table_id;
1865
1866 /**
1867 * internal_buffer count
1868 * Don't touch, used by libavcodec default_get_buffer().
1869 */
1870 int internal_buffer_count;
1871
1872 /**
1873 * internal_buffers
1874 * Don't touch, used by libavcodec default_get_buffer().
1875 */
1876 void *internal_buffer;
1877
1878 #define FF_LAMBDA_SHIFT 7
1879 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1880 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1881 #define FF_LAMBDA_MAX (256*128-1)
1882
1883 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1884 /**
1885 * Global quality for codecs which cannot change it per frame.
1886 * This should be proportional to MPEG-1/2/4 qscale.
1887 * - encoding: Set by user.
1888 * - decoding: unused
1889 */
1890 int global_quality;
1891
1892 #define FF_CODER_TYPE_VLC 0
1893 #define FF_CODER_TYPE_AC 1
1894 #define FF_CODER_TYPE_RAW 2
1895 #define FF_CODER_TYPE_RLE 3
1896 #define FF_CODER_TYPE_DEFLATE 4
1897 /**
1898 * coder type
1899 * - encoding: Set by user.
1900 * - decoding: unused
1901 */
1902 int coder_type;
1903
1904 /**
1905 * context model
1906 * - encoding: Set by user.
1907 * - decoding: unused
1908 */
1909 int context_model;
1910 #if 0
1911 /**
1912 *
1913 * - encoding: unused
1914 * - decoding: Set by user.
1915 */
1916 uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1917 #endif
1918
1919 /**
1920 * slice flags
1921 * - encoding: unused
1922 * - decoding: Set by user.
1923 */
1924 int slice_flags;
1925 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1926 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1927 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1928
1929 /**
1930 * XVideo Motion Acceleration
1931 * - encoding: forbidden
1932 * - decoding: set by decoder
1933 */
1934 int xvmc_acceleration;
1935
1936 /**
1937 * macroblock decision mode
1938 * - encoding: Set by user.
1939 * - decoding: unused
1940 */
1941 int mb_decision;
1942 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1943 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1944 #define FF_MB_DECISION_RD 2 ///< rate distortion
1945
1946 /**
1947 * custom intra quantization matrix
1948 * - encoding: Set by user, can be NULL.
1949 * - decoding: Set by libavcodec.
1950 */
1951 uint16_t *intra_matrix;
1952
1953 /**
1954 * custom inter quantization matrix
1955 * - encoding: Set by user, can be NULL.
1956 * - decoding: Set by libavcodec.
1957 */
1958 uint16_t *inter_matrix;
1959
1960 /**
1961 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1962 * This is used to work around some encoder bugs.
1963 * - encoding: unused
1964 * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1965 */
1966 unsigned int stream_codec_tag;
1967
1968 /**
1969 * scene change detection threshold
1970 * 0 is default, larger means fewer detected scene changes.
1971 * - encoding: Set by user.
1972 * - decoding: unused
1973 */
1974 int scenechange_threshold;
1975
1976 /**
1977 * minimum Lagrange multipler
1978 * - encoding: Set by user.
1979 * - decoding: unused
1980 */
1981 int lmin;
1982
1983 /**
1984 * maximum Lagrange multipler
1985 * - encoding: Set by user.
1986 * - decoding: unused
1987 */
1988 int lmax;
1989
1990 /**
1991 * palette control structure
1992 * - encoding: ??? (no palette-enabled encoder yet)
1993 * - decoding: Set by user.
1994 */
1995 struct AVPaletteControl *palctrl;
1996
1997 /**
1998 * noise reduction strength
1999 * - encoding: Set by user.
2000 * - decoding: unused
2001 */
2002 int noise_reduction;
2003
2004 /**
2005 * Called at the beginning of a frame to get cr buffer for it.
2006 * Buffer type (size, hints) must be the same. libavcodec won't check it.
2007 * libavcodec will pass previous buffer in pic, function should return
2008 * same buffer or new buffer with old frame "painted" into it.
2009 * If pic.data[0] == NULL must behave like get_buffer().
2010 * if CODEC_CAP_DR1 is not set then reget_buffer() must call
2011 * avcodec_default_reget_buffer() instead of providing buffers allocated by
2012 * some other means.
2013 * - encoding: unused
2014 * - decoding: Set by libavcodec., user can override
2015 */
2016 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
2017
2018 /**
2019 * Number of bits which should be loaded into the rc buffer before decoding starts.
2020 * - encoding: Set by user.
2021 * - decoding: unused
2022 */
2023 int rc_initial_buffer_occupancy;
2024
2025 /**
2026 *
2027 * - encoding: Set by user.
2028 * - decoding: unused
2029 */
2030 int inter_threshold;
2031
2032 /**
2033 * CODEC_FLAG2_*
2034 * - encoding: Set by user.
2035 * - decoding: Set by user.
2036 */
2037 int flags2;
2038
2039 /**
2040 * Simulates errors in the bitstream to test error concealment.
2041 * - encoding: Set by user.
2042 * - decoding: unused
2043 */
2044 int error_rate;
2045
2046 /**
2047 * MP3 antialias algorithm, see FF_AA_* below.
2048 * - encoding: unused
2049 * - decoding: Set by user.
2050 */
2051 int antialias_algo;
2052 #define FF_AA_AUTO 0
2053 #define FF_AA_FASTINT 1 //not implemented yet
2054 #define FF_AA_INT 2
2055 #define FF_AA_FLOAT 3
2056 /**
2057 * quantizer noise shaping
2058 * - encoding: Set by user.
2059 * - decoding: unused
2060 */
2061 int quantizer_noise_shaping;
2062
2063 /**
2064 * thread count
2065 * is used to decide how many independent tasks should be passed to execute()
2066 * - encoding: Set by user.
2067 * - decoding: Set by user.
2068 */
2069 int thread_count;
2070
2071 /**
2072 * The codec may call this to execute several independent things.
2073 * It will return only after finishing all tasks.
2074 * The user may replace this with some multithreaded implementation,
2075 * the default implementation will execute the parts serially.
2076 * @param count the number of things to execute
2077 * - encoding: Set by libavcodec, user can override.
2078 * - decoding: Set by libavcodec, user can override.
2079 */
2080 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size);
2081
2082 /**
2083 * thread opaque
2084 * Can be used by execute() to store some per AVCodecContext stuff.
2085 * - encoding: set by execute()
2086 * - decoding: set by execute()
2087 */
2088 void *thread_opaque;
2089
2090 /**
2091 * Motion estimation threshold below which no motion estimation is
2092 * performed, but instead the user specified motion vectors are used.
2093 *
2094 * - encoding: Set by user.
2095 * - decoding: unused
2096 */
2097 int me_threshold;
2098
2099 /**
2100 * Macroblock threshold below which the user specified macroblock types will be used.
2101 * - encoding: Set by user.
2102 * - decoding: unused
2103 */
2104 int mb_threshold;
2105
2106 /**
2107 * precision of the intra DC coefficient - 8
2108 * - encoding: Set by user.
2109 * - decoding: unused
2110 */
2111 int intra_dc_precision;
2112
2113 /**
2114 * noise vs. sse weight for the nsse comparsion function
2115 * - encoding: Set by user.
2116 * - decoding: unused
2117 */
2118 int nsse_weight;
2119
2120 /**
2121 * Number of macroblock rows at the top which are skipped.
2122 * - encoding: unused
2123 * - decoding: Set by user.
2124 */
2125 int skip_top;
2126
2127 /**
2128 * Number of macroblock rows at the bottom which are skipped.
2129 * - encoding: unused
2130 * - decoding: Set by user.
2131 */
2132 int skip_bottom;
2133
2134 /**
2135 * profile
2136 * - encoding: Set by user.
2137 * - decoding: Set by libavcodec.
2138 */
2139 int profile;
2140 #define FF_PROFILE_UNKNOWN -99
2141
2142 #define FF_PROFILE_AAC_MAIN 0
2143 #define FF_PROFILE_AAC_LOW 1
2144 #define FF_PROFILE_AAC_SSR 2
2145 #define FF_PROFILE_AAC_LTP 3
2146
2147 #define FF_PROFILE_H264_BASELINE 66
2148 #define FF_PROFILE_H264_MAIN 77
2149 #define FF_PROFILE_H264_EXTENDED 88
2150 #define FF_PROFILE_H264_HIGH 100
2151 #define FF_PROFILE_H264_HIGH_10 110
2152 #define FF_PROFILE_H264_HIGH_422 122
2153 #define FF_PROFILE_H264_HIGH_444 244
2154 #define FF_PROFILE_H264_CAVLC_444 44
2155
2156 /**
2157 * level
2158 * - encoding: Set by user.
2159 * - decoding: Set by libavcodec.
2160 */
2161 int level;
2162 #define FF_LEVEL_UNKNOWN -99
2163
2164 /**
2165 * low resolution decoding, 1-> 1/2 size, 2->1/4 size
2166 * - encoding: unused
2167 * - decoding: Set by user.
2168 */
2169 int lowres;
2170
2171 /**
2172 * Bitstream width / height, may be different from width/height if lowres
2173 * or other things are used.
2174 * - encoding: unused
2175 * - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
2176 */
2177 int coded_width, coded_height;
2178
2179 /**
2180 * frame skip threshold
2181 * - encoding: Set by user.
2182 * - decoding: unused
2183 */
2184 int frame_skip_threshold;
2185
2186 /**
2187 * frame skip factor
2188 * - encoding: Set by user.
2189 * - decoding: unused
2190 */
2191 int frame_skip_factor;
2192
2193 /**
2194 * frame skip exponent
2195 * - encoding: Set by user.
2196 * - decoding: unused
2197 */
2198 int frame_skip_exp;
2199
2200 /**
2201 * frame skip comparison function
2202 * - encoding: Set by user.
2203 * - decoding: unused
2204 */
2205 int frame_skip_cmp;
2206
2207 /**
2208 * Border processing masking, raises the quantizer for mbs on the borders
2209 * of the picture.
2210 * - encoding: Set by user.
2211 * - decoding: unused
2212 */
2213 float border_masking;
2214
2215 /**
2216 * minimum MB lagrange multipler
2217 * - encoding: Set by user.
2218 * - decoding: unused
2219 */
2220 int mb_lmin;
2221
2222 /**
2223 * maximum MB lagrange multipler
2224 * - encoding: Set by user.
2225 * - decoding: unused
2226 */
2227 int mb_lmax;
2228
2229 /**
2230 *
2231 * - encoding: Set by user.
2232 * - decoding: unused
2233 */
2234 int me_penalty_compensation;
2235
2236 /**
2237 *
2238 * - encoding: unused
2239 * - decoding: Set by user.
2240 */
2241 enum AVDiscard skip_loop_filter;
2242
2243 /**
2244 *
2245 * - encoding: unused
2246 * - decoding: Set by user.
2247 */
2248 enum AVDiscard skip_idct;
2249
2250 /**
2251 *
2252 * - encoding: unused
2253 * - decoding: Set by user.
2254 */
2255 enum AVDiscard skip_frame;
2256
2257 /**
2258 *
2259 * - encoding: Set by user.
2260 * - decoding: unused
2261 */
2262 int bidir_refine;
2263
2264 /**
2265 *
2266 * - encoding: Set by user.
2267 * - decoding: unused
2268 */
2269 int brd_scale;
2270
2271 /**
2272 * constant rate factor - quality-based VBR - values ~correspond to qps
2273 * - encoding: Set by user.
2274 * - decoding: unused
2275 */
2276 float crf;
2277
2278 /**
2279 * constant quantization parameter rate control method
2280 * - encoding: Set by user.
2281 * - decoding: unused
2282 */
2283 int cqp;
2284
2285 /**
2286 * minimum GOP size
2287 * - encoding: Set by user.
2288 * - decoding: unused
2289 */
2290 int keyint_min;
2291
2292 /**
2293 * number of reference frames
2294 * - encoding: Set by user.
2295 * - decoding: Set by lavc.
2296 */
2297 int refs;
2298
2299 /**
2300 * chroma qp offset from luma
2301 * - encoding: Set by user.
2302 * - decoding: unused
2303 */
2304 int chromaoffset;
2305
2306 /**
2307 * Influences how often B-frames are used.
2308 * - encoding: Set by user.
2309 * - decoding: unused
2310 */
2311 int bframebias;
2312
2313 /**
2314 * trellis RD quantization
2315 * - encoding: Set by user.
2316 * - decoding: unused
2317 */
2318 int trellis;
2319
2320 /**
2321 * Reduce fluctuations in qp (before curve compression).
2322 * - encoding: Set by user.
2323 * - decoding: unused
2324 */
2325 float complexityblur;
2326
2327 /**
2328 * in-loop deblocking filter alphac0 parameter
2329 * alpha is in the range -6...6
2330 * - encoding: Set by user.
2331 * - decoding: unused
2332 */
2333 int deblockalpha;
2334
2335 /**
2336 * in-loop deblocking filter beta parameter
2337 * beta is in the range -6...6
2338 * - encoding: Set by user.
2339 * - decoding: unused
2340 */
2341 int deblockbeta;
2342
2343 /**
2344 * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
2345 * - encoding: Set by user.
2346 * - decoding: unused
2347 */
2348 int partitions;
2349 #define X264_PART_I4X4 0x001 /* Analyze i4x4 */
2350 #define X264_PART_I8X8 0x002 /* Analyze i8x8 (requires 8x8 transform) */
2351 #define X264_PART_P8X8 0x010 /* Analyze p16x8, p8x16 and p8x8 */
2352 #define X264_PART_P4X4 0x020 /* Analyze p8x4, p4x8, p4x4 */
2353 #define X264_PART_B8X8 0x100 /* Analyze b16x8, b8x16 and b8x8 */
2354
2355 /**
2356 * direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal), 3 (auto)
2357 * - encoding: Set by user.
2358 * - decoding: unused
2359 */
2360 int directpred;
2361
2362 /**
2363 * Audio cutoff bandwidth (0 means "automatic")
2364 * - encoding: Set by user.
2365 * - decoding: unused
2366 */
2367 int cutoff;
2368
2369 /**
2370 * Multiplied by qscale for each frame and added to scene_change_score.
2371 * - encoding: Set by user.
2372 * - decoding: unused
2373 */
2374 int scenechange_factor;
2375
2376 /**
2377 *
2378 * Note: Value depends upon the compare function used for fullpel ME.
2379 * - encoding: Set by user.
2380 * - decoding: unused
2381 */
2382 int mv0_threshold;
2383
2384 /**
2385 * Adjusts sensitivity of b_frame_strategy 1.
2386 * - encoding: Set by user.
2387 * - decoding: unused
2388 */
2389 int b_sensitivity;
2390
2391 /**
2392 * - encoding: Set by user.
2393 * - decoding: unused
2394 */
2395 int compression_level;
2396 #define FF_COMPRESSION_DEFAULT -1
2397
2398 /**
2399 * Sets whether to use LPC mode - used by FLAC encoder.
2400 * - encoding: Set by user.
2401 * - decoding: unused
2402 */
2403 int use_lpc;
2404
2405 /**
2406 * LPC coefficient precision - used by FLAC encoder
2407 * - encoding: Set by user.
2408 * - decoding: unused
2409 */
2410 int lpc_coeff_precision;
2411
2412 /**
2413 * - encoding: Set by user.
2414 * - decoding: unused
2415 */
2416 int min_prediction_order;
2417
2418 /**
2419 * - encoding: Set by user.
2420 * - decoding: unused
2421 */
2422 int max_prediction_order;
2423
2424 /**
2425 * search method for selecting prediction order
2426 * - encoding: Set by user.
2427 * - decoding: unused
2428 */
2429 int prediction_order_method;
2430
2431 /**
2432 * - encoding: Set by user.
2433 * - decoding: unused
2434 */
2435 int min_partition_order;
2436
2437 /**
2438 * - encoding: Set by user.
2439 * - decoding: unused
2440 */
2441 int max_partition_order;
2442
2443 /**
2444 * GOP timecode frame start number, in non drop frame format
2445 * - encoding: Set by user.
2446 * - decoding: unused
2447 */
2448 int64_t timecode_frame_start;
2449
2450 #if LIBAVCODEC_VERSION_MAJOR < 53
2451 /**
2452 * Decoder should decode to this many channels if it can (0 for default)
2453 * - encoding: unused
2454 * - decoding: Set by user.
2455 * @deprecated Deprecated in favor of request_channel_layout.
2456 */
2457 int request_channels;
2458 #endif
2459
2460 /**
2461 * Percentage of dynamic range compression to be applied by the decoder.
2462 * The default value is 1.0, corresponding to full compression.
2463 * - encoding: unused
2464 * - decoding: Set by user.
2465 */
2466 float drc_scale;
2467
2468 /**
2469 * opaque 64bit number (generally a PTS) that will be reordered and
2470 * output in AVFrame.reordered_opaque
2471 * - encoding: unused
2472 * - decoding: Set by user.
2473 */
2474 int64_t reordered_opaque;
2475
2476 /**
2477 * Bits per sample/pixel of internal libavcodec pixel/sample format.
2478 * This field is applicable only when sample_fmt is SAMPLE_FMT_S32.
2479 * - encoding: set by user.
2480 * - decoding: set by libavcodec.
2481 */
2482 int bits_per_raw_sample;
2483
2484 /**
2485 * Audio channel layout.
2486 * - encoding: set by user.
2487 * - decoding: set by libavcodec.
2488 */
2489 int64_t channel_layout;
2490
2491 /**
2492 * Request decoder to use this channel layout if it can (0 for default)
2493 * - encoding: unused
2494 * - decoding: Set by user.
2495 */
2496 int64_t request_channel_layout;
2497
2498 /**
2499 * Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow.
2500 * - encoding: Set by user.
2501 * - decoding: unused.
2502 */
2503 float rc_max_available_vbv_use;
2504
2505 /**
2506 * Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow.
2507 * - encoding: Set by user.
2508 * - decoding: unused.
2509 */
2510 float rc_min_vbv_overflow_use;
2511
2512 /**
2513 * Hardware accelerator in use
2514 * - encoding: unused.
2515 * - decoding: Set by libavcodec
2516 */
2517 struct AVHWAccel *hwaccel;
2518
2519 /**
2520 * For some codecs, the time base is closer to the field rate than the frame rate.
2521 * Most notably, H.264 and MPEG-2 specify time_base as half of frame duration
2522 * if no telecine is used ...
2523 *
2524 * Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2.
2525 */
2526 int ticks_per_frame;
2527
2528 /**
2529 * Hardware accelerator context.
2530 * For some hardware accelerators, a global context needs to be
2531 * provided by the user. In that case, this holds display-dependent
2532 * data FFmpeg cannot instantiate itself. Please refer to the
2533 * FFmpeg HW accelerator documentation to know how to fill this
2534 * is. e.g. for VA API, this is a struct vaapi_context.
2535 * - encoding: unused
2536 * - decoding: Set by user
2537 */
2538 void *hwaccel_context;
2539
2540 /**
2541 * Chromaticity coordinates of the source primaries.
2542 * - encoding: Set by user
2543 * - decoding: Set by libavcodec
2544 */
2545 enum AVColorPrimaries color_primaries;
2546
2547 /**
2548 * Color Transfer Characteristic.
2549 * - encoding: Set by user
2550 * - decoding: Set by libavcodec
2551 */
2552 enum AVColorTransferCharacteristic color_trc;
2553
2554 /**
2555 * YUV colorspace type.
2556 * - encoding: Set by user
2557 * - decoding: Set by libavcodec
2558 */
2559 enum AVColorSpace colorspace;
2560
2561 /**
2562 * MPEG vs JPEG YUV range.
2563 * - encoding: Set by user
2564 * - decoding: Set by libavcodec
2565 */
2566 enum AVColorRange color_range;
2567
2568 /**
2569 * This defines the location of chroma samples.
2570 * - encoding: Set by user
2571 * - decoding: Set by libavcodec
2572 */
2573 enum AVChromaLocation chroma_sample_location;
2574
2575 /**
2576 * The codec may call this to execute several independent things.
2577 * It will return only after finishing all tasks.
2578 * The user may replace this with some multithreaded implementation,
2579 * the default implementation will execute the parts serially.
2580 * Also see avcodec_thread_init and e.g. the --enable-pthread configure option.
2581 * @param c context passed also to func
2582 * @param count the number of things to execute
2583 * @param arg2 argument passed unchanged to func
2584 * @param ret return values of executed functions, must have space for "count" values. May be NULL.
2585 * @param func function that will be called count times, with jobnr from 0 to count-1.
2586 * threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no
2587 * two instances of func executing at the same time will have the same threadnr.
2588 * @return always 0 currently, but code should handle a future improvement where when any call to func
2589 * returns < 0 no further calls to func may be done and < 0 is returned.
2590 * - encoding: Set by libavcodec, user can override.
2591 * - decoding: Set by libavcodec, user can override.
2592 */
2593 int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count);
2594
2595 /**
2596 * explicit P-frame weighted prediction analysis method
2597 * 0: off
2598 * 1: fast blind weighting (one reference duplicate with -1 offset)
2599 * 2: smart weighting (full fade detection analysis)
2600 * - encoding: Set by user.
2601 * - decoding: unused
2602 */
2603 int weighted_p_pred;
2604
2605 /**
2606 * AQ mode
2607 * 0: Disabled
2608 * 1: Variance AQ (complexity mask)
2609 * 2: Auto-variance AQ (experimental)
2610 * - encoding: Set by user
2611 * - decoding: unused
2612 */
2613 int aq_mode;
2614
2615 /**
2616 * AQ strength
2617 * Reduces blocking and blurring in flat and textured areas.
2618 * - encoding: Set by user
2619 * - decoding: unused
2620 */
2621 float aq_strength;
2622
2623 /**
2624 * PSY RD
2625 * Strength of psychovisual optimization
2626 * - encoding: Set by user
2627 * - decoding: unused
2628 */
2629 float psy_rd;
2630
2631 /**
2632 * PSY trellis
2633 * Strength of psychovisual optimization
2634 * - encoding: Set by user
2635 * - decoding: unused
2636 */
2637 float psy_trellis;
2638
2639 /**
2640 * RC lookahead
2641 * Number of frames for frametype and ratecontrol lookahead
2642 * - encoding: Set by user
2643 * - decoding: unused
2644 */
2645 int rc_lookahead;
2646 } AVCodecContext;
2647
2648 /**
2649 * AVCodec.
2650 */
2651 typedef struct AVCodec {
2652 /**
2653 * Name of the codec implementation.
2654 * The name is globally unique among encoders and among decoders (but an
2655 * encoder and a decoder can share the same name).
2656 * This is the primary way to find a codec from the user perspective.
2657 */
2658 const char *name;
2659 enum CodecType type;
2660 enum CodecID id;
2661 int priv_data_size;
2662 int (*init)(AVCodecContext *);
2663 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2664 int (*close)(AVCodecContext *);
2665 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt);
2666 /**
2667 * Codec capabilities.
2668 * see CODEC_CAP_*
2669 */
2670 int capabilities;
2671 struct AVCodec *next;
2672 /**
2673 * Flush buffers.
2674 * Will be called when seeking
2675 */
2676 void (*flush)(AVCodecContext *);
2677 const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0}
2678 const enum PixelFormat *pix_fmts; ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1
2679 /**
2680 * Descriptive name for the codec, meant to be more human readable than name.
2681 * You should use the NULL_IF_CONFIG_SMALL() macro to define it.
2682 */
2683 const char *long_name;
2684 const int *supported_samplerates; ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
2685 const enum SampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1
2686 const int64_t *channel_layouts; ///< array of support channel layouts, or NULL if unknown. array is terminated by 0
2687 } AVCodec;
2688
2689 /**
2690 * AVHWAccel.
2691 */
2692 typedef struct AVHWAccel {
2693 /**
2694 * Name of the hardware accelerated codec.
2695 * The name is globally unique among encoders and among decoders (but an
2696 * encoder and a decoder can share the same name).
2697 */
2698 const char *name;
2699
2700 /**
2701 * Type of codec implemented by the hardware accelerator.
2702 *
2703 * See CODEC_TYPE_xxx
2704 */
2705 enum CodecType type;
2706
2707 /**
2708 * Codec implemented by the hardware accelerator.
2709 *
2710 * See CODEC_ID_xxx
2711 */
2712 enum CodecID id;
2713
2714 /**
2715 * Supported pixel format.
2716 *
2717 * Only hardware accelerated formats are supported here.
2718 */
2719 enum PixelFormat pix_fmt;
2720
2721 /**
2722 * Hardware accelerated codec capabilities.
2723 * see FF_HWACCEL_CODEC_CAP_*
2724 */
2725 int capabilities;
2726
2727 struct AVHWAccel *next;
2728
2729 /**
2730 * Called at the beginning of each frame or field picture.
2731 *
2732 * Meaningful frame information (codec specific) is guaranteed to
2733 * be parsed at this point. This function is mandatory.
2734 *
2735 * Note that buf can be NULL along with buf_size set to 0.
2736 * Otherwise, this means the whole frame is available at this point.
2737 *
2738 * @param avctx the codec context
2739 * @param buf the frame data buffer base
2740 * @param buf_size the size of the frame in bytes
2741 * @return zero if successful, a negative value otherwise
2742 */
2743 int (*start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
2744
2745 /**
2746 * Callback for each slice.
2747 *
2748 * Meaningful slice information (codec specific) is guaranteed to
2749 * be parsed at this point. This function is mandatory.
2750 *
2751 * @param avctx the codec context
2752 * @param buf the slice data buffer base
2753 * @param buf_size the size of the slice in bytes
2754 * @return zero if successful, a negative value otherwise
2755 */
2756 int (*decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
2757
2758 /**
2759 * Called at the end of each frame or field picture.
2760 *
2761 * The whole picture is parsed at this point and can now be sent
2762 * to the hardware accelerator. This function is mandatory.
2763 *
2764 * @param avctx the codec context
2765 * @return zero if successful, a negative value otherwise
2766 */
2767 int (*end_frame)(AVCodecContext *avctx);
2768
2769 /**
2770 * Size of HW accelerator private data.
2771 *
2772 * Private data is allocated with av_mallocz() before
2773 * AVCodecContext.get_buffer() and deallocated after
2774 * AVCodecContext.release_buffer().
2775 */
2776 int priv_data_size;
2777 } AVHWAccel;
2778
2779 /**
2780 * four components are given, that's all.
2781 * the last component is alpha
2782 */
2783 typedef struct AVPicture {
2784 uint8_t *data[4];
2785 int linesize[4]; ///< number of bytes per line
2786 } AVPicture;
2787
2788 #if LIBAVCODEC_VERSION_MAJOR < 53
2789 /**
2790 * AVPaletteControl
2791 * This structure defines a method for communicating palette changes
2792 * between and demuxer and a decoder.
2793 *
2794 * @deprecated Use AVPacket to send palette changes instead.
2795 * This is totally broken.
2796 */
2797 #define AVPALETTE_SIZE 1024
2798 #define AVPALETTE_COUNT 256
2799 typedef struct AVPaletteControl {
2800
2801 /* Demuxer sets this to 1 to indicate the palette has changed;
2802 * decoder resets to 0. */
2803 int palette_changed;
2804
2805 /* 4-byte ARGB palette entries, stored in native byte order; note that
2806 * the individual palette components should be on a 8-bit scale; if
2807 * the palette data comes from an IBM VGA native format, the component
2808 * data is probably 6 bits in size and needs to be scaled. */
2809 unsigned int palette[AVPALETTE_COUNT];
2810
2811 } AVPaletteControl attribute_deprecated;
2812 #endif
2813
2814 enum AVSubtitleType {
2815 SUBTITLE_NONE,
2816
2817 SUBTITLE_BITMAP, ///< A bitmap, pict will be set
2818
2819 /**
2820 * Plain text, the text field must be set by the decoder and is
2821 * authoritative. ass and pict fields may contain approximations.
2822 */
2823 SUBTITLE_TEXT,
2824
2825 /**
2826 * Formatted text, the ass field must be set by the decoder and is
2827 * authoritative. pict and text fields may contain approximations.
2828 */
2829 SUBTITLE_ASS,
2830 };
2831
2832 typedef struct AVSubtitleRect {
2833 int x; ///< top left corner of pict, undefined when pict is not set
2834 int y; ///< top left corner of pict, undefined when pict is not set
2835 int w; ///< width of pict, undefined when pict is not set
2836 int h; ///< height of pict, undefined when pict is not set
2837 int nb_colors; ///< number of colors in pict, undefined when pict is not set
2838
2839 /**
2840 * data+linesize for the bitmap of this subtitle.
2841 * can be set for text/ass as well once they where rendered
2842 */
2843 AVPicture pict;
2844 enum AVSubtitleType type;
2845
2846 char *text; ///< 0 terminated plain UTF-8 text
2847
2848 /**
2849 * 0 terminated ASS/SSA compatible event line.
2850 * The pressentation of this is unaffected by the other values in this
2851 * struct.
2852 */
2853 char *ass;
2854 } AVSubtitleRect;
2855
2856 typedef struct AVSubtitle {
2857 uint16_t format; /* 0 = graphics */
2858 uint32_t start_display_time; /* relative to packet pts, in ms */
2859 uint32_t end_display_time; /* relative to packet pts, in ms */
2860 unsigned num_rects;
2861 AVSubtitleRect **rects;
2862 int64_t pts; ///< Same as packet pts, in AV_TIME_BASE
2863 } AVSubtitle;
2864
2865 /* packet functions */
2866
2867 /**
2868 * @deprecated use NULL instead
2869 */
2870 attribute_deprecated void av_destruct_packet_nofree(AVPacket *pkt);
2871
2872 /**
2873 * Default packet destructor.
2874 */
2875 void av_destruct_packet(AVPacket *pkt);
2876
2877 /**
2878 * Initialize optional fields of a packet with default values.
2879 *
2880 * @param pkt packet
2881 */
2882 void av_init_packet(AVPacket *pkt);
2883
2884 /**
2885 * Allocate the payload of a packet and initialize its fields with
2886 * default values.
2887 *
2888 * @param pkt packet
2889 * @param size wanted payload size
2890 * @return 0 if OK, AVERROR_xxx otherwise
2891 */
2892 int av_new_packet(AVPacket *pkt, int size);
2893
2894 /**
2895 * Reduce packet size, correctly zeroing padding
2896 *
2897 * @param pkt packet
2898 * @param size new size
2899 */
2900 void av_shrink_packet(AVPacket *pkt, int size);
2901
2902 /**
2903 * @warning This is a hack - the packet memory allocation stuff is broken. The
2904 * packet is allocated if it was not really allocated.
2905 */
2906 int av_dup_packet(AVPacket *pkt);
2907
2908 /**
2909 * Free a packet.
2910 *
2911 * @param pkt packet to free
2912 */
2913 void av_free_packet(AVPacket *pkt);
2914
2915 /* resample.c */
2916
2917 struct ReSampleContext;
2918 struct AVResampleContext;
2919
2920 typedef struct ReSampleContext ReSampleContext;
2921
2922 #if LIBAVCODEC_VERSION_MAJOR < 53
2923 /**
2924 * @deprecated Use av_audio_resample_init() instead.
2925 */
2926 attribute_deprecated ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2927 int output_rate, int input_rate);
2928 #endif
2929 /**
2930 * Initializes audio resampling context
2931 *
2932 * @param output_channels number of output channels
2933 * @param input_channels number of input channels
2934 * @param output_rate output sample rate
2935 * @param input_rate input sample rate
2936 * @param sample_fmt_out requested output sample format
2937 * @param sample_fmt_in input sample format
2938 * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
2939 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
2940 * @param linear If 1 then the used FIR filter will be linearly interpolated
2941 between the 2 closest, if 0 the closest will be used
2942 * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
2943 * @return allocated ReSampleContext, NULL if error occured
2944 */
2945 ReSampleContext *av_audio_resample_init(int output_channels, int input_channels,
2946 int output_rate, int input_rate,
2947 enum SampleFormat sample_fmt_out,
2948 enum SampleFormat sample_fmt_in,
2949 int filter_length, int log2_phase_count,
2950 int linear, double cutoff);
2951
2952 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2953 void audio_resample_close(ReSampleContext *s);
2954
2955
2956 /**
2957 * Initializes an audio resampler.
2958 * Note, if either rate is not an integer then simply scale both rates up so they are.
2959 * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
2960 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
2961 * @param linear If 1 then the used FIR filter will be linearly interpolated
2962 between the 2 closest, if 0 the closest will be used
2963 * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
2964 */
2965 struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2966
2967 /**
2968 * resamples.
2969 * @param src an array of unconsumed samples
2970 * @param consumed the number of samples of src which have been consumed are returned here
2971 * @param src_size the number of unconsumed samples available
2972 * @param dst_size the amount of space in samples available in dst
2973 * @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.
2974 * @return the number of samples written in dst or -1 if an error occurred
2975 */
2976 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2977
2978
2979 /**
2980 * Compensates samplerate/timestamp drift. The compensation is done by changing
2981 * the resampler parameters, so no audible clicks or similar distortions occur
2982 * @param compensation_distance distance in output samples over which the compensation should be performed
2983 * @param sample_delta number of output samples which should be output less
2984 *
2985 * example: av_resample_compensate(c, 10, 500)
2986 * here instead of 510 samples only 500 samples would be output
2987 *
2988 * note, due to rounding the actual compensation might be slightly different,
2989 * especially if the compensation_distance is large and the in_rate used during init is small
2990 */
2991 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2992 void av_resample_close(struct AVResampleContext *c);
2993
2994 /**
2995 * Allocate memory for a picture. Call avpicture_free to free it.
2996 *
2997 * @param picture the picture to be filled in
2998 * @param pix_fmt the format of the picture
2999 * @param width the width of the picture
3000 * @param height the height of the picture
3001 * @return zero if successful, a negative value if not
3002 */
3003 int avpicture_alloc(AVPicture *picture, enum PixelFormat pix_fmt, int width, int height);
3004
3005 /**
3006 * Free a picture previously allocated by avpicture_alloc().
3007 *
3008 * @param picture the AVPicture to be freed
3009 */
3010 void avpicture_free(AVPicture *picture);
3011
3012 /**
3013 * Fill in the AVPicture fields.
3014 * The fields of the given AVPicture are filled in by using the 'ptr' address
3015 * which points to the image data buffer. Depending on the specified picture
3016 * format, one or multiple image data pointers and line sizes will be set.
3017 * If a planar format is specified, several pointers will be set pointing to
3018 * the different picture planes and the line sizes of the different planes
3019 * will be stored in the lines_sizes array.
3020 * Call with ptr == NULL to get the required size for the ptr buffer.
3021 *
3022 * @param picture AVPicture whose fields are to be filled in
3023 * @param ptr Buffer which will contain or contains the actual image data
3024 * @param pix_fmt The format in which the picture data is stored.
3025 * @param width the width of the image in pixels
3026 * @param height the height of the image in pixels
3027 * @return size of the image data in bytes
3028 */
3029 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
3030 enum PixelFormat pix_fmt, int width, int height);
3031 int avpicture_layout(const AVPicture* src, enum PixelFormat pix_fmt, int width, int height,
3032 unsigned char *dest, int dest_size);
3033
3034 /**
3035 * Calculate the size in bytes that a picture of the given width and height
3036 * would occupy if stored in the given picture format.
3037 * Note that this returns the size of a compact representation as generated
3038 * by avpicture_layout, which can be smaller than the size required for e.g.
3039 * avpicture_fill.
3040 *
3041 * @param pix_fmt the given picture format
3042 * @param width the width of the image
3043 * @param height the height of the image
3044 * @return Image data size in bytes or -1 on error (e.g. too large dimensions).
3045 */
3046 int avpicture_get_size(enum PixelFormat pix_fmt, int width, int height);
3047 void avcodec_get_chroma_sub_sample(enum PixelFormat pix_fmt, int *h_shift, int *v_shift);
3048 const char *avcodec_get_pix_fmt_name(enum PixelFormat pix_fmt);
3049 void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
3050
3051 #if LIBAVCODEC_VERSION_MAJOR < 53
3052 /**
3053 * Returns the pixel format corresponding to the name name.
3054 *
3055 * If there is no pixel format with name name, then looks for a
3056 * pixel format with the name corresponding to the native endian
3057 * format of name.
3058 * For example in a little-endian system, first looks for "gray16",
3059 * then for "gray16le".
3060 *
3061 * Finally if no pixel format has been found, returns PIX_FMT_NONE.
3062 *
3063 * @deprecated Deprecated in favor of av_get_pix_fmt().
3064 */
3065 attribute_deprecated enum PixelFormat avcodec_get_pix_fmt(const char* name);
3066 #endif
3067
3068 /**
3069 * Returns a value representing the fourCC code associated to the
3070 * pixel format pix_fmt, or 0 if no associated fourCC code can be
3071 * found.
3072 */
3073 unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat pix_fmt);
3074
3075 #define FF_LOSS_RESOLUTION 0x0001 /**< loss due to resolution change */
3076 #define FF_LOSS_DEPTH 0x0002 /**< loss due to color depth change */
3077 #define FF_LOSS_COLORSPACE 0x0004 /**< loss due to color space conversion */
3078 #define FF_LOSS_ALPHA 0x0008 /**< loss of alpha bits */
3079 #define FF_LOSS_COLORQUANT 0x0010 /**< loss due to color quantization */
3080 #define FF_LOSS_CHROMA 0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
3081
3082 /**
3083 * Computes what kind of losses will occur when converting from one specific
3084 * pixel format to another.
3085 * When converting from one pixel format to another, information loss may occur.
3086 * For example, when converting from RGB24 to GRAY, the color information will
3087 * be lost. Similarly, other losses occur when converting from some formats to
3088 * other formats. These losses can involve loss of chroma, but also loss of
3089 * resolution, loss of color depth, loss due to the color space conversion, loss
3090 * of the alpha bits or loss due to color quantization.
3091 * avcodec_get_fix_fmt_loss() informs you about the various types of losses
3092 * which will occur when converting from one pixel format to another.
3093 *
3094 * @param[in] dst_pix_fmt destination pixel format
3095 * @param[in] src_pix_fmt source pixel format
3096 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
3097 * @return Combination of flags informing you what kind of losses will occur.
3098 */
3099 int avcodec_get_pix_fmt_loss(enum PixelFormat dst_pix_fmt, enum PixelFormat src_pix_fmt,
3100 int has_alpha);
3101
3102 /**
3103 * Finds the best pixel format to convert to given a certain source pixel
3104 * format. When converting from one pixel format to another, information loss
3105 * may occur. For example, when converting from RGB24 to GRAY, the color
3106 * information will be lost. Similarly, other losses occur when converting from
3107 * some formats to other formats. avcodec_find_best_pix_fmt() searches which of
3108 * the given pixel formats should be used to suffer the least amount of loss.
3109 * The pixel formats from which it chooses one, are determined by the
3110 * pix_fmt_mask parameter.
3111 *
3112 * @code
3113 * src_pix_fmt = PIX_FMT_YUV420P;
3114 * pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << PIX_FMT_RGB24);
3115 * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
3116 * @endcode
3117 *
3118 * @param[in] pix_fmt_mask bitmask determining which pixel format to choose from
3119 * @param[in] src_pix_fmt source pixel format
3120 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
3121 * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
3122 * @return The best pixel format to convert to or -1 if none was found.
3123 */
3124 enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt,
3125 int has_alpha, int *loss_ptr);
3126
3127
3128 /**
3129 * Print in buf the string corresponding to the pixel format with
3130 * number pix_fmt, or an header if pix_fmt is negative.
3131 *
3132 * @param[in] buf the buffer where to write the string
3133 * @param[in] buf_size the size of buf
3134 * @param[in] pix_fmt the number of the pixel format to print the corresponding info string, or
3135 * a negative value to print the corresponding header.
3136 * Meaningful values for obtaining a pixel format info vary from 0 to PIX_FMT_NB -1.
3137 */
3138 void avcodec_pix_fmt_string (char *buf, int buf_size, enum PixelFormat pix_fmt);
3139
3140 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
3141 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
3142
3143 /**
3144 * Tell if an image really has transparent alpha values.
3145 * @return ored mask of FF_ALPHA_xxx constants
3146 */
3147 int img_get_alpha_info(const AVPicture *src,
3148 enum PixelFormat pix_fmt, int width, int height);
3149
3150 /* deinterlace a picture */
3151 /* deinterlace - if not supported return -1 */
3152 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
3153 enum PixelFormat pix_fmt, int width, int height);
3154
3155 /* external high level API */
3156
3157 /**
3158 * If c is NULL, returns the first registered codec,
3159 * if c is non-NULL, returns the next registered codec after c,
3160 * or NULL if c is the last one.
3161 */
3162 AVCodec *av_codec_next(AVCodec *c);
3163
3164 /**
3165 * Returns the LIBAVCODEC_VERSION_INT constant.
3166 */
3167 unsigned avcodec_version(void);
3168
3169 /**
3170 * Returns the libavcodec build-time configuration.
3171 */
3172 const char *avcodec_configuration(void);
3173
3174 /**
3175 * Returns the libavcodec license.
3176 */
3177 const char *avcodec_license(void);
3178
3179 /**
3180 * Initializes libavcodec.
3181 *
3182 * @warning This function must be called before any other libavcodec
3183 * function.
3184 */
3185 void avcodec_init(void);
3186
3187 #if LIBAVCODEC_VERSION_MAJOR < 53
3188 /**
3189 * @deprecated Deprecated in favor of avcodec_register().
3190 */
3191 attribute_deprecated void register_avcodec(AVCodec *codec);
3192 #endif
3193
3194 /**
3195 * Register the codec codec and initialize libavcodec.
3196 *
3197 * @see avcodec_init()
3198 */
3199 void avcodec_register(AVCodec *codec);
3200
3201 /**
3202 * Finds a registered encoder with a matching codec ID.
3203 *
3204 * @param id CodecID of the requested encoder
3205 * @return An encoder if one was found, NULL otherwise.
3206 */
3207 AVCodec *avcodec_find_encoder(enum CodecID id);
3208
3209 /**
3210 * Finds a registered encoder with the specified name.
3211 *
3212 * @param name name of the requested encoder
3213 * @return An encoder if one was found, NULL otherwise.
3214 */
3215 AVCodec *avcodec_find_encoder_by_name(const char *name);
3216
3217 /**
3218 * Finds a registered decoder with a matching codec ID.
3219 *
3220 * @param id CodecID of the requested decoder
3221 * @return A decoder if one was found, NULL otherwise.
3222 */
3223 AVCodec *avcodec_find_decoder(enum CodecID id);
3224
3225 /**
3226 * Finds a registered decoder with the specified name.
3227 *
3228 * @param name name of the requested decoder
3229 * @return A decoder if one was found, NULL otherwise.
3230 */
3231 AVCodec *avcodec_find_decoder_by_name(const char *name);
3232 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
3233
3234 /**
3235 * Sets the fields of the given AVCodecContext to default values.
3236 *
3237 * @param s The AVCodecContext of which the fields should be set to default values.
3238 */
3239 void avcodec_get_context_defaults(AVCodecContext *s);
3240
3241 /** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3242 * we WILL change its arguments and name a few times! */
3243 void avcodec_get_context_defaults2(AVCodecContext *s, enum CodecType);
3244
3245 /**
3246 * Allocates an AVCodecContext and sets its fields to default values. The
3247 * resulting struct can be deallocated by simply calling av_free().
3248 *
3249 * @return An AVCodecContext filled with default values or NULL on failure.
3250 * @see avcodec_get_context_defaults
3251 */
3252 AVCodecContext *avcodec_alloc_context(void);
3253
3254 /** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3255 * we WILL change its arguments and name a few times! */
3256 AVCodecContext *avcodec_alloc_context2(enum CodecType);
3257
3258 /**
3259 * Sets the fields of the given AVFrame to default values.
3260 *
3261 * @param pic The AVFrame of which the fields should be set to default values.
3262 */
3263 void avcodec_get_frame_defaults(AVFrame *pic);
3264
3265 /**
3266 * Allocates an AVFrame and sets its fields to default values. The resulting
3267 * struct can be deallocated by simply calling av_free().
3268 *
3269 * @return An AVFrame filled with default values or NULL on failure.
3270 * @see avcodec_get_frame_defaults
3271 */
3272 AVFrame *avcodec_alloc_frame(void);
3273
3274 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
3275 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
3276 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
3277 /**
3278 * Modifies width and height values so that they will result in a memory
3279 * buffer that is acceptable for the codec if you do not use any horizontal
3280 * padding.
3281 */
3282 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
3283 /**
3284 * Modifies width and height values so that they will result in a memory
3285 * buffer that is acceptable for the codec if you also ensure that all
3286 * line sizes are a multiple of the respective linesize_align[i].
3287 */
3288 void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
3289 int linesize_align[4]);
3290
3291 /**
3292 * Checks if the given dimension of a picture is valid, meaning that all
3293 * bytes of the picture can be addressed with a signed int.
3294 *
3295 * @param[in] w Width of the picture.
3296 * @param[in] h Height of the picture.
3297 * @return Zero if valid, a negative value if invalid.
3298 */
3299 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
3300 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
3301
3302 int avcodec_thread_init(AVCodecContext *s, int thread_count);
3303 void avcodec_thread_free(AVCodecContext *s);
3304 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size);
3305 int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int, int),void *arg, int *ret, int count);
3306 //FIXME func typedef
3307
3308 /**
3309 * Initializes the AVCodecContext to use the given AVCodec. Prior to using this
3310 * function the context has to be allocated.
3311 *
3312 * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
3313 * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
3314 * retrieving a codec.
3315 *
3316 * @warning This function is not thread safe!
3317 *
3318 * @code
3319 * avcodec_register_all();
3320 * codec = avcodec_find_decoder(CODEC_ID_H264);
3321 * if (!codec)
3322 * exit(1);
3323 *
3324 * context = avcodec_alloc_context();
3325 *
3326 * if (avcodec_open(context, codec) < 0)
3327 * exit(1);
3328 * @endcode
3329 *
3330 * @param avctx The context which will be set up to use the given codec.
3331 * @param codec The codec to use within the context.
3332 * @return zero on success, a negative value on error
3333 * @see avcodec_alloc_context, avcodec_find_decoder, avcodec_find_encoder
3334 */
3335 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
3336
3337 #if LIBAVCODEC_VERSION_MAJOR < 53
3338 /**
3339 * Decodes an audio frame from buf into samples.
3340 * Wrapper function which calls avcodec_decode_audio3.
3341 *
3342 * @deprecated Use avcodec_decode_audio3 instead.
3343 * @param avctx the codec context
3344 * @param[out] samples the output buffer
3345 * @param[in,out] frame_size_ptr the output buffer size in bytes
3346 * @param[in] buf the input buffer
3347 * @param[in] buf_size the input buffer size in bytes
3348 * @return On error a negative value is returned, otherwise the number of bytes
3349 * used or zero if no frame could be decompressed.
3350 */
3351 attribute_deprecated int avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
3352 int *frame_size_ptr,
3353 const uint8_t *buf, int buf_size);
3354 #endif
3355
3356 /**
3357 * Decodes the audio frame of size avpkt->size from avpkt->data into samples.
3358 * Some decoders may support multiple frames in a single AVPacket, such
3359 * decoders would then just decode the first frame. In this case,
3360 * avcodec_decode_audio3 has to be called again with an AVPacket that contains
3361 * the remaining data in order to decode the second frame etc.
3362 * If no frame
3363 * could be outputted, frame_size_ptr is zero. Otherwise, it is the
3364 * decompressed frame size in bytes.
3365 *
3366 * @warning You must set frame_size_ptr to the allocated size of the
3367 * output buffer before calling avcodec_decode_audio3().
3368 *
3369 * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
3370 * the actual read bytes because some optimized bitstream readers read 32 or 64
3371 * bits at once and could read over the end.
3372 *
3373 * @warning The end of the input buffer avpkt->data should be set to 0 to ensure that
3374 * no overreading happens for damaged MPEG streams.
3375 *
3376 * @note You might have to align the input buffer avpkt->data and output buffer
3377 * samples. The alignment requirements depend on the CPU: On some CPUs it isn't
3378 * necessary at all, on others it won't work at all if not aligned and on others
3379 * it will work but it will have an impact on performance.
3380 *
3381 * In practice, avpkt->data should have 4 byte alignment at minimum and
3382 * samples should be 16 byte aligned unless the CPU doesn't need it
3383 * (AltiVec and SSE do).
3384 *
3385 * @param avctx the codec context
3386 * @param[out] samples the output buffer, sample type in avctx->sample_fmt
3387 * @param[in,out] frame_size_ptr the output buffer size in bytes
3388 * @param[in] avpkt The input AVPacket containing the input buffer.
3389 * You can create such packet with av_init_packet() and by then setting
3390 * data and size, some decoders might in addition need other fields.
3391 * All decoders are designed to use the least fields possible though.
3392 * @return On error a negative value is returned, otherwise the number of bytes
3393 * used or zero if no frame data was decompressed (used) from the input AVPacket.
3394 */
3395 int avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
3396 int *frame_size_ptr,
3397 AVPacket *avpkt);
3398
3399 #if LIBAVCODEC_VERSION_MAJOR < 53
3400 /**
3401 * Decodes a video frame from buf into picture.
3402 * Wrapper function which calls avcodec_decode_video2.
3403 *
3404 * @deprecated Use avcodec_decode_video2 instead.
3405 * @param avctx the codec context
3406 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
3407 * @param[in] buf the input buffer
3408 * @param[in] buf_size the size of the input buffer in bytes
3409 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
3410 * @return On error a negative value is returned, otherwise the number of bytes
3411 * used or zero if no frame could be decompressed.
3412 */
3413 attribute_deprecated int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
3414 int *got_picture_ptr,
3415 const uint8_t *buf, int buf_size);
3416 #endif
3417
3418 /**
3419 * Decodes the video frame of size avpkt->size from avpkt->data into picture.
3420 * Some decoders may support multiple frames in a single AVPacket, such
3421 * decoders would then just decode the first frame.
3422 *
3423 * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
3424 * the actual read bytes because some optimized bitstream readers read 32 or 64
3425 * bits at once and could read over the end.
3426 *
3427 * @warning The end of the input buffer buf should be set to 0 to ensure that
3428 * no overreading happens for damaged MPEG streams.
3429 *
3430 * @note You might have to align the input buffer avpkt->data.
3431 * The alignment requirements depend on the CPU: on some CPUs it isn't
3432 * necessary at all, on others it won't work at all if not aligned and on others
3433 * it will work but it will have an impact on performance.
3434 *
3435 * In practice, avpkt->data should have 4 byte alignment at minimum.
3436 *
3437 * @note Some codecs have a delay between input and output, these need to be
3438 * fed with avpkt->data=NULL, avpkt->size=0 at the end to return the remaining frames.
3439 *
3440 * @param avctx the codec context
3441 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
3442 * @param[in] avpkt The input AVpacket containing the input buffer.
3443 * You can create such packet with av_init_packet() and by then setting
3444 * data and size, some decoders might in addition need other fields like
3445 * flags&PKT_FLAG_KEY. All decoders are designed to use the least
3446 * fields possible.
3447 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
3448 * @return On error a negative value is returned, otherwise the number of bytes
3449 * used or zero if no frame could be decompressed.
3450 */
3451 int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
3452 int *got_picture_ptr,
3453 AVPacket *avpkt);
3454
3455 #if LIBAVCODEC_VERSION_MAJOR < 53
3456 /* Decode a subtitle message. Return -1 if error, otherwise return the
3457 * number of bytes used. If no subtitle could be decompressed,
3458 * got_sub_ptr is zero. Otherwise, the subtitle is stored in *sub. */
3459 attribute_deprecated int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
3460 int *got_sub_ptr,
3461 const uint8_t *buf, int buf_size);
3462 #endif
3463
3464 /**
3465 * Decodes a subtitle message.
3466 * Returns a negative value on error, otherwise returns the number of bytes used.
3467 * If no subtitle could be decompressed, got_sub_ptr is zero.
3468 * Otherwise, the subtitle is stored in *sub.
3469 *
3470 * @param avctx the codec context
3471 * @param[out] sub The AVSubtitle in which the decoded subtitle will be stored.
3472 * @param[in,out] got_sub_ptr Zero if no subtitle could be decompressed, otherwise, it is nonzero.
3473 * @param[in] avpkt The input AVPacket containing the input buffer.
3474 */
3475 int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
3476 int *got_sub_ptr,
3477 AVPacket *avpkt);
3478 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
3479 int *data_size_ptr,
3480 uint8_t *buf, int buf_size);
3481
3482 /**
3483 * Encodes an audio frame from samples into buf.
3484 *
3485 * @note The output buffer should be at least FF_MIN_BUFFER_SIZE bytes large.
3486 * However, for PCM audio the user will know how much space is needed
3487 * because it depends on the value passed in buf_size as described
3488 * below. In that case a lower value can be used.
3489 *
3490 * @param avctx the codec context
3491 * @param[out] buf the output buffer
3492 * @param[in] buf_size the output buffer size
3493 * @param[in] samples the input buffer containing the samples
3494 * The number of samples read from this buffer is frame_size*channels,
3495 * both of which are defined in avctx.
3496 * For PCM audio the number of samples read from samples is equal to
3497 * buf_size * input_sample_size / output_sample_size.
3498 * @return On error a negative value is returned, on success zero or the number
3499 * of bytes used to encode the data read from the input buffer.
3500 */
3501 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3502 const short *samples);
3503
3504 /**
3505 * Encodes a video frame from pict into buf.
3506 * The input picture should be
3507 * stored using a specific format, namely avctx.pix_fmt.
3508 *
3509 * @param avctx the codec context
3510 * @param[out] buf the output buffer for the bitstream of encoded frame
3511 * @param[in] buf_size the size of the output buffer in bytes
3512 * @param[in] pict the input picture to encode
3513 * @return On error a negative value is returned, on success zero or the number
3514 * of bytes used from the output buffer.
3515 */
3516 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3517 const AVFrame *pict);
3518 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3519 const AVSubtitle *sub);
3520
3521 int avcodec_close(AVCodecContext *avctx);
3522
3523 /**
3524 * Register all the codecs, parsers and bitstream filters which were enabled at
3525 * configuration time. If you do not call this function you can select exactly
3526 * which formats you want to support, by using the individual registration
3527 * functions.
3528 *
3529 * @see avcodec_register
3530 * @see av_register_codec_parser
3531 * @see av_register_bitstream_filter
3532 */
3533 void avcodec_register_all(void);
3534
3535 /**
3536 * Flush buffers, should be called when seeking or when switching to a different stream.
3537 */
3538 void avcodec_flush_buffers(AVCodecContext *avctx);
3539
3540 void avcodec_default_free_buffers(AVCodecContext *s);
3541
3542 /* misc useful functions */
3543
3544 /**
3545 * Returns a single letter to describe the given picture type pict_type.
3546 *
3547 * @param[in] pict_type the picture type
3548 * @return A single character representing the picture type.
3549 */
3550 char av_get_pict_type_char(int pict_type);
3551
3552 /**
3553 * Returns codec bits per sample.
3554 *
3555 * @param[in] codec_id the codec
3556 * @return Number of bits per sample or zero if unknown for the given codec.
3557 */
3558 int av_get_bits_per_sample(enum CodecID codec_id);
3559
3560 /**
3561 * Returns sample format bits per sample.
3562 *
3563 * @param[in] sample_fmt the sample format
3564 * @return Number of bits per sample or zero if unknown for the given sample format.
3565 */
3566 int av_get_bits_per_sample_format(enum SampleFormat sample_fmt);
3567
3568 /* frame parsing */
3569 typedef struct AVCodecParserContext {
3570 void *priv_data;
3571 struct AVCodecParser *parser;
3572 int64_t frame_offset; /* offset of the current frame */
3573 int64_t cur_offset; /* current offset
3574 (incremented by each av_parser_parse()) */
3575 int64_t next_frame_offset; /* offset of the next frame */
3576 /* video info */
3577 int pict_type; /* XXX: Put it back in AVCodecContext. */
3578 /**
3579 * This field is used for proper frame duration computation in lavf.
3580 * It signals, how much longer the frame duration of the current frame
3581 * is compared to normal frame duration.
3582 *
3583 * frame_duration = (1 + repeat_pict) * time_base
3584 *
3585 * It is used by codecs like H.264 to display telecined material.
3586 */
3587 int repeat_pict; /* XXX: Put it back in AVCodecContext. */
3588 int64_t pts; /* pts of the current frame */
3589 int64_t dts; /* dts of the current frame */
3590
3591 /* private data */
3592 int64_t last_pts;
3593 int64_t last_dts;
3594 int fetch_timestamp;
3595
3596 #define AV_PARSER_PTS_NB 4
3597 int cur_frame_start_index;
3598 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
3599 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
3600 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
3601
3602 int flags;
3603 #define PARSER_FLAG_COMPLETE_FRAMES 0x0001
3604
3605 int64_t offset; ///< byte offset from starting packet start
3606 int64_t cur_frame_end[AV_PARSER_PTS_NB];
3607
3608 /*!
3609 * Set by parser to 1 for key frames and 0 for non-key frames.
3610 * It is initialized to -1, so if the parser doesn't set this flag,
3611 * old-style fallback using FF_I_TYPE picture type as key frames
3612 * will be used.
3613 */
3614 int key_frame;
3615
3616 /**
3617 * Time difference in stream time base units from the pts of this
3618 * packet to the point at which the output from the decoder has converged
3619 * independent from the availability of previous frames. That is, the
3620 * frames are virtually identical no matter if decoding started from
3621 * the very first frame or from this keyframe.
3622 * Is AV_NOPTS_VALUE if unknown.
3623 * This field is not the display duration of the current frame.
3624 *
3625 * The purpose of this field is to allow seeking in streams that have no
3626 * keyframes in the conventional sense. It corresponds to the
3627 * recovery point SEI in H.264 and match_time_delta in NUT. It is also
3628 * essential for some types of subtitle streams to ensure that all
3629 * subtitles are correctly displayed after seeking.
3630 */
3631 int64_t convergence_duration;
3632
3633 // Timestamp generation support:
3634 /**
3635 * Synchronization point for start of timestamp generation.
3636 *
3637 * Set to >0 for sync point, 0 for no sync point and <0 for undefined
3638 * (default).
3639 *
3640 * For example, this corresponds to presence of H.264 buffering period
3641 * SEI message.
3642 */
3643 int dts_sync_point;
3644
3645 /**
3646 * Offset of the current timestamp against last timestamp sync point in
3647 * units of AVCodecContext.time_base.
3648 *
3649 * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
3650 * contain a valid timestamp offset.
3651 *
3652 * Note that the timestamp of sync point has usually a nonzero
3653 * dts_ref_dts_delta, which refers to the previous sync point. Offset of
3654 * the next frame after timestamp sync point will be usually 1.
3655 *
3656 * For example, this corresponds to H.264 cpb_removal_delay.
3657 */
3658 int dts_ref_dts_delta;
3659
3660 /**
3661 * Presentation delay of current frame in units of AVCodecContext.time_base.
3662 *
3663 * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
3664 * contain valid non-negative timestamp delta (presentation time of a frame
3665 * must not lie in the past).
3666 *
3667 * This delay represents the difference between decoding and presentation
3668 * time of the frame.
3669 *
3670 * For example, this corresponds to H.264 dpb_output_delay.
3671 */
3672 int pts_dts_delta;
3673
3674 /**
3675 * Position of the packet in file.
3676 *
3677 * Analogous to cur_frame_pts/dts
3678 */
3679 int64_t cur_frame_pos[AV_PARSER_PTS_NB];
3680
3681 /**
3682 * Byte position of currently parsed frame in stream.
3683 */
3684 int64_t pos;
3685
3686 /**
3687 * Previous frame byte position.
3688 */
3689 int64_t last_pos;
3690 } AVCodecParserContext;
3691
3692 typedef struct AVCodecParser {
3693 int codec_ids[5]; /* several codec IDs are permitted */
3694 int priv_data_size;
3695 int (*parser_init)(AVCodecParserContext *s);
3696 int (*parser_parse)(AVCodecParserContext *s,
3697 AVCodecContext *avctx,
3698 const uint8_t **poutbuf, int *poutbuf_size,
3699 const uint8_t *buf, int buf_size);
3700 void (*parser_close)(AVCodecParserContext *s);
3701 int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
3702 struct AVCodecParser *next;
3703 } AVCodecParser;
3704
3705 AVCodecParser *av_parser_next(AVCodecParser *c);
3706
3707 void av_register_codec_parser(AVCodecParser *parser);
3708 AVCodecParserContext *av_parser_init(int codec_id);
3709
3710 #if LIBAVCODEC_VERSION_MAJOR < 53
3711 attribute_deprecated
3712 int av_parser_parse(AVCodecParserContext *s,
3713 AVCodecContext *avctx,
3714 uint8_t **poutbuf, int *poutbuf_size,
3715 const uint8_t *buf, int buf_size,
3716 int64_t pts, int64_t dts);
3717 #endif
3718
3719 /**
3720 * Parse a packet.
3721 *
3722 * @param s parser context.
3723 * @param avctx codec context.
3724 * @param poutbuf set to pointer to parsed buffer or NULL if not yet finished.
3725 * @param poutbuf_size set to size of parsed buffer or zero if not yet finished.
3726 * @param buf input buffer.
3727 * @param buf_size input length, to signal EOF, this should be 0 (so that the last frame can be output).
3728 * @param pts input presentation timestamp.
3729 * @param dts input decoding timestamp.
3730 * @param pos input byte position in stream.
3731 * @return the number of bytes of the input bitstream used.
3732 *
3733 * Example:
3734 * @code
3735 * while(in_len){
3736 * len = av_parser_parse2(myparser, AVCodecContext, &data, &size,
3737 * in_data, in_len,
3738 * pts, dts, pos);
3739 * in_data += len;
3740 * in_len -= len;
3741 *
3742 * if(size)
3743 * decode_frame(data, size);
3744 * }
3745 * @endcode
3746 */
3747 int av_parser_parse2(AVCodecParserContext *s,
3748 AVCodecContext *avctx,
3749 uint8_t **poutbuf, int *poutbuf_size,
3750 const uint8_t *buf, int buf_size,
3751 int64_t pts, int64_t dts,
3752 int64_t pos);
3753
3754 int av_parser_change(AVCodecParserContext *s,
3755 AVCodecContext *avctx,
3756 uint8_t **poutbuf, int *poutbuf_size,
3757 const uint8_t *buf, int buf_size, int keyframe);
3758 void av_parser_close(AVCodecParserContext *s);
3759
3760
3761 typedef struct AVBitStreamFilterContext {
3762 void *priv_data;
3763 struct AVBitStreamFilter *filter;
3764 AVCodecParserContext *parser;
3765 struct AVBitStreamFilterContext *next;
3766 } AVBitStreamFilterContext;
3767
3768
3769 typedef struct AVBitStreamFilter {
3770 const char *name;
3771 int priv_data_size;
3772 int (*filter)(AVBitStreamFilterContext *bsfc,
3773 AVCodecContext *avctx, const char *args,
3774 uint8_t **poutbuf, int *poutbuf_size,
3775 const uint8_t *buf, int buf_size, int keyframe);
3776 void (*close)(AVBitStreamFilterContext *bsfc);
3777 struct AVBitStreamFilter *next;
3778 } AVBitStreamFilter;
3779
3780 void av_register_bitstream_filter(AVBitStreamFilter *bsf);
3781 AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
3782 int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
3783 AVCodecContext *avctx, const char *args,