Enable more libx264 options, aq, psy, rc lookahead and ssim
[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.
608 * direct rendering method 1
609 */
610 #define CODEC_CAP_DR1 0x0002
611 /* If 'parse_only' field is true, then avcodec_parse_frame() can be used. */
612 #define CODEC_CAP_PARSE_ONLY 0x0004
613 #define CODEC_CAP_TRUNCATED 0x0008
614 /* Codec can export data for HW decoding (XvMC). */
615 #define CODEC_CAP_HWACCEL 0x0010
616 /**
617 * Codec has a nonzero delay and needs to be fed with NULL at the end to get the delayed data.
618 * If this is not set, the codec is guaranteed to never be fed with NULL data.
619 */
620 #define CODEC_CAP_DELAY 0x0020
621 /**
622 * Codec can be fed a final frame with a smaller size.
623 * This can be used to prevent truncation of the last audio samples.
624 */
625 #define CODEC_CAP_SMALL_LAST_FRAME 0x0040
626 /**
627 * Codec can export data for HW decoding (VDPAU).
628 */
629 #define CODEC_CAP_HWACCEL_VDPAU 0x0080
630 /**
631 * Codec can output multiple frames per AVPacket
632 * Normally demuxers return one frame at a time, demuxers which do not do
633 * are connected to a parser to split what they return into proper frames.
634 * This flag is reserved to the very rare category of codecs which have a
635 * bitstream that cannot be split into frames without timeconsuming
636 * operations like full decoding. Demuxers carring such bitstreams thus
637 * may return multiple frames in a packet. This has many disadvantages like
638 * prohibiting stream copy in many cases thus it should only be considered
639 * as a last resort.
640 */
641 #define CODEC_CAP_SUBFRAMES 0x0100
642
643 //The following defines may change, don't expect compatibility if you use them.
644 #define MB_TYPE_INTRA4x4 0x0001
645 #define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
646 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME H.264-specific
647 #define MB_TYPE_16x16 0x0008
648 #define MB_TYPE_16x8 0x0010
649 #define MB_TYPE_8x16 0x0020
650 #define MB_TYPE_8x8 0x0040
651 #define MB_TYPE_INTERLACED 0x0080
652 #define MB_TYPE_DIRECT2 0x0100 //FIXME
653 #define MB_TYPE_ACPRED 0x0200
654 #define MB_TYPE_GMC 0x0400
655 #define MB_TYPE_SKIP 0x0800
656 #define MB_TYPE_P0L0 0x1000
657 #define MB_TYPE_P1L0 0x2000
658 #define MB_TYPE_P0L1 0x4000
659 #define MB_TYPE_P1L1 0x8000
660 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
661 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
662 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
663 #define MB_TYPE_QUANT 0x00010000
664 #define MB_TYPE_CBP 0x00020000
665 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
666
667 /**
668 * Pan Scan area.
669 * This specifies the area which should be displayed.
670 * Note there may be multiple such areas for one frame.
671 */
672 typedef struct AVPanScan{
673 /**
674 * id
675 * - encoding: Set by user.
676 * - decoding: Set by libavcodec.
677 */
678 int id;
679
680 /**
681 * width and height in 1/16 pel
682 * - encoding: Set by user.
683 * - decoding: Set by libavcodec.
684 */
685 int width;
686 int height;
687
688 /**
689 * position of the top left corner in 1/16 pel for up to 3 fields/frames
690 * - encoding: Set by user.
691 * - decoding: Set by libavcodec.
692 */
693 int16_t position[3][2];
694 }AVPanScan;
695
696 #define FF_COMMON_FRAME \
697 /**\
698 * pointer to the picture planes.\
699 * This might be different from the first allocated byte\
700 * - encoding: \
701 * - decoding: \
702 */\
703 uint8_t *data[4];\
704 int linesize[4];\
705 /**\
706 * pointer to the first allocated byte of the picture. Can be used in get_buffer/release_buffer.\
707 * This isn't used by libavcodec unless the default get/release_buffer() is used.\
708 * - encoding: \
709 * - decoding: \
710 */\
711 uint8_t *base[4];\
712 /**\
713 * 1 -> keyframe, 0-> not\
714 * - encoding: Set by libavcodec.\
715 * - decoding: Set by libavcodec.\
716 */\
717 int key_frame;\
718 \
719 /**\
720 * Picture type of the frame, see ?_TYPE below.\
721 * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
722 * - decoding: Set by libavcodec.\
723 */\
724 int pict_type;\
725 \
726 /**\
727 * presentation timestamp in time_base units (time when frame should be shown to user)\
728 * If AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed.\
729 * - encoding: MUST be set by user.\
730 * - decoding: Set by libavcodec.\
731 */\
732 int64_t pts;\
733 \
734 /**\
735 * picture number in bitstream order\
736 * - encoding: set by\
737 * - decoding: Set by libavcodec.\
738 */\
739 int coded_picture_number;\
740 /**\
741 * picture number in display order\
742 * - encoding: set by\
743 * - decoding: Set by libavcodec.\
744 */\
745 int display_picture_number;\
746 \
747 /**\
748 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
749 * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
750 * - decoding: Set by libavcodec.\
751 */\
752 int quality; \
753 \
754 /**\
755 * buffer age (1->was last buffer and dint change, 2->..., ...).\
756 * Set to INT_MAX if the buffer has not been used yet.\
757 * - encoding: unused\
758 * - decoding: MUST be set by get_buffer().\
759 */\
760 int age;\
761 \
762 /**\
763 * is this picture used as reference\
764 * The values for this are the same as the MpegEncContext.picture_structure\
765 * variable, that is 1->top field, 2->bottom field, 3->frame/both fields.\
766 * Set to 4 for delayed, non-reference frames.\
767 * - encoding: unused\
768 * - decoding: Set by libavcodec. (before get_buffer() call)).\
769 */\
770 int reference;\
771 \
772 /**\
773 * QP table\
774 * - encoding: unused\
775 * - decoding: Set by libavcodec.\
776 */\
777 int8_t *qscale_table;\
778 /**\
779 * QP store stride\
780 * - encoding: unused\
781 * - decoding: Set by libavcodec.\
782 */\
783 int qstride;\
784 \
785 /**\
786 * mbskip_table[mb]>=1 if MB didn't change\
787 * stride= mb_width = (width+15)>>4\
788 * - encoding: unused\
789 * - decoding: Set by libavcodec.\
790 */\
791 uint8_t *mbskip_table;\
792 \
793 /**\
794 * motion vector table\
795 * @code\
796 * example:\
797 * int mv_sample_log2= 4 - motion_subsample_log2;\
798 * int mb_width= (width+15)>>4;\
799 * int mv_stride= (mb_width << mv_sample_log2) + 1;\
800 * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
801 * @endcode\
802 * - encoding: Set by user.\
803 * - decoding: Set by libavcodec.\
804 */\
805 int16_t (*motion_val[2])[2];\
806 \
807 /**\
808 * macroblock type table\
809 * mb_type_base + mb_width + 2\
810 * - encoding: Set by user.\
811 * - decoding: Set by libavcodec.\
812 */\
813 uint32_t *mb_type;\
814 \
815 /**\
816 * log2 of the size of the block which a single vector in motion_val represents: \
817 * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
818 * - encoding: unused\
819 * - decoding: Set by libavcodec.\
820 */\
821 uint8_t motion_subsample_log2;\
822 \
823 /**\
824 * for some private data of the user\
825 * - encoding: unused\
826 * - decoding: Set by user.\
827 */\
828 void *opaque;\
829 \
830 /**\
831 * error\
832 * - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR.\
833 * - decoding: unused\
834 */\
835 uint64_t error[4];\
836 \
837 /**\
838 * type of the buffer (to keep track of who has to deallocate data[*])\
839 * - encoding: Set by the one who allocates it.\
840 * - decoding: Set by the one who allocates it.\
841 * Note: User allocated (direct rendering) & internal buffers cannot coexist currently.\
842 */\
843 int type;\
844 \
845 /**\
846 * When decoding, this signals how much the picture must be delayed.\
847 * extra_delay = repeat_pict / (2*fps)\
848 * - encoding: unused\
849 * - decoding: Set by libavcodec.\
850 */\
851 int repeat_pict;\
852 \
853 /**\
854 * \
855 */\
856 int qscale_type;\
857 \
858 /**\
859 * The content of the picture is interlaced.\
860 * - encoding: Set by user.\
861 * - decoding: Set by libavcodec. (default 0)\
862 */\
863 int interlaced_frame;\
864 \
865 /**\
866 * If the content is interlaced, is top field displayed first.\
867 * - encoding: Set by user.\
868 * - decoding: Set by libavcodec.\
869 */\
870 int top_field_first;\
871 \
872 /**\
873 * Pan scan.\
874 * - encoding: Set by user.\
875 * - decoding: Set by libavcodec.\
876 */\
877 AVPanScan *pan_scan;\
878 \
879 /**\
880 * Tell user application that palette has changed from previous frame.\
881 * - encoding: ??? (no palette-enabled encoder yet)\
882 * - decoding: Set by libavcodec. (default 0).\
883 */\
884 int palette_has_changed;\
885 \
886 /**\
887 * codec suggestion on buffer type if != 0\
888 * - encoding: unused\
889 * - decoding: Set by libavcodec. (before get_buffer() call)).\
890 */\
891 int buffer_hints;\
892 \
893 /**\
894 * DCT coefficients\
895 * - encoding: unused\
896 * - decoding: Set by libavcodec.\
897 */\
898 short *dct_coeff;\
899 \
900 /**\
901 * motion reference frame index\
902 * the order in which these are stored can depend on the codec.\
903 * - encoding: Set by user.\
904 * - decoding: Set by libavcodec.\
905 */\
906 int8_t *ref_index[2];\
907 \
908 /**\
909 * reordered opaque 64bit number (generally a PTS) from AVCodecContext.reordered_opaque\
910 * output in AVFrame.reordered_opaque\
911 * - encoding: unused\
912 * - decoding: Read by user.\
913 */\
914 int64_t reordered_opaque;\
915 \
916 /**\
917 * hardware accelerator private data (FFmpeg allocated)\
918 * - encoding: unused\
919 * - decoding: Set by libavcodec\
920 */\
921 void *hwaccel_picture_private;\
922
923
924 #define FF_QSCALE_TYPE_MPEG1 0
925 #define FF_QSCALE_TYPE_MPEG2 1
926 #define FF_QSCALE_TYPE_H264 2
927 #define FF_QSCALE_TYPE_VP56 3
928
929 #define FF_BUFFER_TYPE_INTERNAL 1
930 #define FF_BUFFER_TYPE_USER 2 ///< direct rendering buffers (image is (de)allocated by user)
931 #define FF_BUFFER_TYPE_SHARED 4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared.
932 #define FF_BUFFER_TYPE_COPY 8 ///< Just a (modified) copy of some other buffer, don't deallocate anything.
933
934
935 #define FF_I_TYPE 1 ///< Intra
936 #define FF_P_TYPE 2 ///< Predicted
937 #define FF_B_TYPE 3 ///< Bi-dir predicted
938 #define FF_S_TYPE 4 ///< S(GMC)-VOP MPEG4
939 #define FF_SI_TYPE 5 ///< Switching Intra
940 #define FF_SP_TYPE 6 ///< Switching Predicted
941 #define FF_BI_TYPE 7
942
943 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore).
944 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer.
945 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content.
946 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update).
947
948 typedef struct AVPacket {
949 /**
950 * Presentation timestamp in AVStream->time_base units; the time at which
951 * the decompressed packet will be presented to the user.
952 * Can be AV_NOPTS_VALUE if it is not stored in the file.
953 * pts MUST be larger or equal to dts as presentation cannot happen before
954 * decompression, unless one wants to view hex dumps. Some formats misuse
955 * the terms dts and pts/cts to mean something different. Such timestamps
956 * must be converted to true pts/dts before they are stored in AVPacket.
957 */
958 int64_t pts;
959 /**
960 * Decompression timestamp in AVStream->time_base units; the time at which
961 * the packet is decompressed.
962 * Can be AV_NOPTS_VALUE if it is not stored in the file.
963 */
964 int64_t dts;
965 uint8_t *data;
966 int size;
967 int stream_index;
968 int flags;
969 /**
970 * Duration of this packet in AVStream->time_base units, 0 if unknown.
971 * Equals next_pts - this_pts in presentation order.
972 */
973 int duration;
974 void (*destruct)(struct AVPacket *);
975 void *priv;
976 int64_t pos; ///< byte position in stream, -1 if unknown
977
978 /**
979 * Time difference in AVStream->time_base units from the pts of this
980 * packet to the point at which the output from the decoder has converged
981 * independent from the availability of previous frames. That is, the
982 * frames are virtually identical no matter if decoding started from
983 * the very first frame or from this keyframe.
984 * Is AV_NOPTS_VALUE if unknown.
985 * This field is not the display duration of the current packet.
986 *
987 * The purpose of this field is to allow seeking in streams that have no
988 * keyframes in the conventional sense. It corresponds to the
989 * recovery point SEI in H.264 and match_time_delta in NUT. It is also
990 * essential for some types of subtitle streams to ensure that all
991 * subtitles are correctly displayed after seeking.
992 */
993 int64_t convergence_duration;
994 } AVPacket;
995 #define AV_PKT_FLAG_KEY 0x0001
996 #if LIBAVCODEC_VERSION_MAJOR < 53
997 #define PKT_FLAG_KEY AV_PKT_FLAG_KEY
998 #endif
999
1000 /**
1001 * Audio Video Frame.
1002 * New fields can be added to the end of FF_COMMON_FRAME with minor version
1003 * bumps.
1004 * Removal, reordering and changes to existing fields require a major
1005 * version bump. No fields should be added into AVFrame before or after
1006 * FF_COMMON_FRAME!
1007 * sizeof(AVFrame) must not be used outside libav*.
1008 */
1009 typedef struct AVFrame {
1010 FF_COMMON_FRAME
1011 } AVFrame;
1012
1013 /**
1014 * main external API structure.
1015 * New fields can be added to the end with minor version bumps.
1016 * Removal, reordering and changes to existing fields require a major
1017 * version bump.
1018 * sizeof(AVCodecContext) must not be used outside libav*.
1019 */
1020 typedef struct AVCodecContext {
1021 /**
1022 * information on struct for av_log
1023 * - set by avcodec_alloc_context
1024 */
1025 const AVClass *av_class;
1026 /**
1027 * the average bitrate
1028 * - encoding: Set by user; unused for constant quantizer encoding.
1029 * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.
1030 */
1031 int bit_rate;
1032
1033 /**
1034 * number of bits the bitstream is allowed to diverge from the reference.
1035 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
1036 * - encoding: Set by user; unused for constant quantizer encoding.
1037 * - decoding: unused
1038 */
1039 int bit_rate_tolerance;
1040
1041 /**
1042 * CODEC_FLAG_*.
1043 * - encoding: Set by user.
1044 * - decoding: Set by user.
1045 */
1046 int flags;
1047
1048 /**
1049 * Some codecs need additional format info. It is stored here.
1050 * If any muxer uses this then ALL demuxers/parsers AND encoders for the
1051 * specific codec MUST set it correctly otherwise stream copy breaks.
1052 * In general use of this field by muxers is not recommanded.
1053 * - encoding: Set by libavcodec.
1054 * - decoding: Set by libavcodec. (FIXME: Is this OK?)
1055 */
1056 int sub_id;
1057
1058 /**
1059 * Motion estimation algorithm used for video coding.
1060 * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
1061 * 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific]
1062 * - encoding: MUST be set by user.
1063 * - decoding: unused
1064 */
1065 int me_method;
1066
1067 /**
1068 * some codecs need / can use extradata like Huffman tables.
1069 * mjpeg: Huffman tables
1070 * rv10: additional flags
1071 * mpeg4: global headers (they can be in the bitstream or here)
1072 * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
1073 * than extradata_size to avoid prolems if it is read with the bitstream reader.
1074 * The bytewise contents of extradata must not depend on the architecture or CPU endianness.
1075 * - encoding: Set/allocated/freed by libavcodec.
1076 * - decoding: Set/allocated/freed by user.
1077 */
1078 uint8_t *extradata;
1079 int extradata_size;
1080
1081 /**
1082 * This is the fundamental unit of time (in seconds) in terms
1083 * of which frame timestamps are represented. For fixed-fps content,
1084 * timebase should be 1/framerate and timestamp increments should be
1085 * identically 1.
1086 * - encoding: MUST be set by user.
1087 * - decoding: Set by libavcodec.
1088 */
1089 AVRational time_base;
1090
1091 /* video only */
1092 /**
1093 * picture width / height.
1094 * - encoding: MUST be set by user.
1095 * - decoding: Set by libavcodec.
1096 * Note: For compatibility it is possible to set this instead of
1097 * coded_width/height before decoding.
1098 */
1099 int width, height;
1100
1101 #define FF_ASPECT_EXTENDED 15
1102
1103 /**
1104 * the number of pictures in a group of pictures, or 0 for intra_only
1105 * - encoding: Set by user.
1106 * - decoding: unused
1107 */
1108 int gop_size;
1109
1110 /**
1111 * Pixel format, see PIX_FMT_xxx.
1112 * - encoding: Set by user.
1113 * - decoding: Set by libavcodec.
1114 */
1115 enum PixelFormat pix_fmt;
1116
1117 /**
1118 * Frame rate emulation. If not zero, the lower layer (i.e. format handler)
1119 * has to read frames at native frame rate.
1120 * - encoding: Set by user.
1121 * - decoding: unused
1122 */
1123 int rate_emu;
1124
1125 /**
1126 * If non NULL, 'draw_horiz_band' is called by the libavcodec
1127 * decoder to draw a horizontal band. It improves cache usage. Not
1128 * all codecs can do that. You must check the codec capabilities
1129 * beforehand.
1130 * The function is also used by hardware acceleration APIs.
1131 * It is called at least once during frame decoding to pass
1132 * the data needed for hardware render.
1133 * In that mode instead of pixel data, AVFrame points to
1134 * a structure specific to the acceleration API. The application
1135 * reads the structure and can change some fields to indicate progress
1136 * or mark state.
1137 * - encoding: unused
1138 * - decoding: Set by user.
1139 * @param height the height of the slice
1140 * @param y the y position of the slice
1141 * @param type 1->top field, 2->bottom field, 3->frame
1142 * @param offset offset into the AVFrame.data from which the slice should be read
1143 */
1144 void (*draw_horiz_band)(struct AVCodecContext *s,
1145 const AVFrame *src, int offset[4],
1146 int y, int type, int height);
1147
1148 /* audio only */
1149 int sample_rate; ///< samples per second
1150 int channels; ///< number of audio channels
1151
1152 /**
1153 * audio sample format
1154 * - encoding: Set by user.
1155 * - decoding: Set by libavcodec.
1156 */
1157 enum SampleFormat sample_fmt; ///< sample format
1158
1159 /* The following data should not be initialized. */
1160 /**
1161 * Samples per packet, initialized when calling 'init'.
1162 */
1163 int frame_size;
1164 int frame_number; ///< audio or video frame number
1165 #if LIBAVCODEC_VERSION_MAJOR < 53
1166 int real_pict_num; ///< Returns the real picture number of previous encoded frame.
1167 #endif
1168
1169 /**
1170 * Number of frames the decoded output will be delayed relative to
1171 * the encoded input.
1172 * - encoding: Set by libavcodec.
1173 * - decoding: unused
1174 */
1175 int delay;
1176
1177 /* - encoding parameters */
1178 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
1179 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
1180
1181 /**
1182 * minimum quantizer
1183 * - encoding: Set by user.
1184 * - decoding: unused
1185 */
1186 int qmin;
1187
1188 /**
1189 * maximum quantizer
1190 * - encoding: Set by user.
1191 * - decoding: unused
1192 */
1193 int qmax;
1194
1195 /**
1196 * maximum quantizer difference between frames
1197 * - encoding: Set by user.
1198 * - decoding: unused
1199 */
1200 int max_qdiff;
1201
1202 /**
1203 * maximum number of B-frames between non-B-frames
1204 * Note: The output will be delayed by max_b_frames+1 relative to the input.
1205 * - encoding: Set by user.
1206 * - decoding: unused
1207 */
1208 int max_b_frames;
1209
1210 /**
1211 * qscale factor between IP and B-frames
1212 * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
1213 * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1214 * - encoding: Set by user.
1215 * - decoding: unused
1216 */
1217 float b_quant_factor;
1218
1219 /** obsolete FIXME remove */
1220 int rc_strategy;
1221 #define FF_RC_STRATEGY_XVID 1
1222
1223 int b_frame_strategy;
1224
1225 /**
1226 * hurry up amount
1227 * - encoding: unused
1228 * - decoding: Set by user. 1-> Skip B-frames, 2-> Skip IDCT/dequant too, 5-> Skip everything except header
1229 * @deprecated Deprecated in favor of skip_idct and skip_frame.
1230 */
1231 int hurry_up;
1232
1233 struct AVCodec *codec;
1234
1235 void *priv_data;
1236
1237 int rtp_payload_size; /* The size of the RTP payload: the coder will */
1238 /* do its best to deliver a chunk with size */
1239 /* below rtp_payload_size, the chunk will start */
1240 /* with a start code on some codecs like H.263. */
1241 /* This doesn't take account of any particular */
1242 /* headers inside the transmitted RTP payload. */
1243
1244
1245 /* The RTP callback: This function is called */
1246 /* every time the encoder has a packet to send. */
1247 /* It depends on the encoder if the data starts */
1248 /* with a Start Code (it should). H.263 does. */
1249 /* mb_nb contains the number of macroblocks */
1250 /* encoded in the RTP payload. */
1251 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
1252
1253 /* statistics, used for 2-pass encoding */
1254 int mv_bits;
1255 int header_bits;
1256 int i_tex_bits;
1257 int p_tex_bits;
1258 int i_count;
1259 int p_count;
1260 int skip_count;
1261 int misc_bits;
1262
1263 /**
1264 * number of bits used for the previously encoded frame
1265 * - encoding: Set by libavcodec.
1266 * - decoding: unused
1267 */
1268 int frame_bits;
1269
1270 /**
1271 * Private data of the user, can be used to carry app specific stuff.
1272 * - encoding: Set by user.
1273 * - decoding: Set by user.
1274 */
1275 void *opaque;
1276
1277 char codec_name[32];
1278 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
1279 enum CodecID codec_id; /* see CODEC_ID_xxx */
1280
1281 /**
1282 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1283 * This is used to work around some encoder bugs.
1284 * A demuxer should set this to what is stored in the field used to identify the codec.
1285 * If there are multiple such fields in a container then the demuxer should choose the one
1286 * which maximizes the information about the used codec.
1287 * If the codec tag field in a container is larger then 32 bits then the demuxer should
1288 * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
1289 * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
1290 * first.
1291 * - encoding: Set by user, if not then the default based on codec_id will be used.
1292 * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1293 */
1294 unsigned int codec_tag;
1295
1296 /**
1297 * Work around bugs in encoders which sometimes cannot be detected automatically.
1298 * - encoding: Set by user
1299 * - decoding: Set by user
1300 */
1301 int workaround_bugs;
1302 #define FF_BUG_AUTODETECT 1 ///< autodetection
1303 #define FF_BUG_OLD_MSMPEG4 2
1304 #define FF_BUG_XVID_ILACE 4
1305 #define FF_BUG_UMP4 8
1306 #define FF_BUG_NO_PADDING 16
1307 #define FF_BUG_AMV 32
1308 #define FF_BUG_AC_VLC 0 ///< Will be removed, libavcodec can now handle these non-compliant files by default.
1309 #define FF_BUG_QPEL_CHROMA 64
1310 #define FF_BUG_STD_QPEL 128
1311 #define FF_BUG_QPEL_CHROMA2 256
1312 #define FF_BUG_DIRECT_BLOCKSIZE 512
1313 #define FF_BUG_EDGE 1024
1314 #define FF_BUG_HPEL_CHROMA 2048
1315 #define FF_BUG_DC_CLIP 4096
1316 #define FF_BUG_MS 8192 ///< Work around various bugs in Microsoft's broken decoders.
1317 #define FF_BUG_TRUNCATED 16384
1318 //#define FF_BUG_FAKE_SCALABILITY 16 //Autodetection should work 100%.
1319
1320 /**
1321 * luma single coefficient elimination threshold
1322 * - encoding: Set by user.
1323 * - decoding: unused
1324 */
1325 int luma_elim_threshold;
1326
1327 /**
1328 * chroma single coeff elimination threshold
1329 * - encoding: Set by user.
1330 * - decoding: unused
1331 */
1332 int chroma_elim_threshold;
1333
1334 /**
1335 * strictly follow the standard (MPEG4, ...).
1336 * - encoding: Set by user.
1337 * - decoding: Set by user.
1338 * Setting this to STRICT or higher means the encoder and decoder will
1339 * generally do stupid things. While setting it to inofficial or lower
1340 * will mean the encoder might use things that are not supported by all
1341 * spec compliant decoders. Decoders make no difference between normal,
1342 * inofficial and experimental, that is they always try to decode things
1343 * when they can unless they are explicitly asked to behave stupid
1344 * (=strictly conform to the specs)
1345 */
1346 int strict_std_compliance;
1347 #define FF_COMPLIANCE_VERY_STRICT 2 ///< Strictly conform to a older more strict version of the spec or reference software.
1348 #define FF_COMPLIANCE_STRICT 1 ///< Strictly conform to all the things in the spec no matter what consequences.
1349 #define FF_COMPLIANCE_NORMAL 0
1350 #define FF_COMPLIANCE_INOFFICIAL -1 ///< Allow inofficial extensions.
1351 #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
1352
1353 /**
1354 * qscale offset between IP and B-frames
1355 * - encoding: Set by user.
1356 * - decoding: unused
1357 */
1358 float b_quant_offset;
1359
1360 /**
1361 * Error recognization; higher values will detect more errors but may
1362 * misdetect some more or less valid parts as errors.
1363 * - encoding: unused
1364 * - decoding: Set by user.
1365 */
1366 int error_recognition;
1367 #define FF_ER_CAREFUL 1
1368 #define FF_ER_COMPLIANT 2
1369 #define FF_ER_AGGRESSIVE 3
1370 #define FF_ER_VERY_AGGRESSIVE 4
1371
1372 /**
1373 * Called at the beginning of each frame to get a buffer for it.
1374 * If pic.reference is set then the frame will be read later by libavcodec.
1375 * avcodec_align_dimensions2() should be used to find the required width and
1376 * height, as they normally need to be rounded up to the next multiple of 16.
1377 * if CODEC_CAP_DR1 is not set then get_buffer() must call
1378 * avcodec_default_get_buffer() instead of providing buffers allocated by
1379 * some other means.
1380 * - encoding: unused
1381 * - decoding: Set by libavcodec., user can override.
1382 */
1383 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1384
1385 /**
1386 * Called to release buffers which were allocated with get_buffer.
1387 * A released buffer can be reused in get_buffer().
1388 * pic.data[*] must be set to NULL.
1389 * - encoding: unused
1390 * - decoding: Set by libavcodec., user can override.
1391 */
1392 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1393
1394 /**
1395 * Size of the frame reordering buffer in the decoder.
1396 * For MPEG-2 it is 1 IPB or 0 low delay IP.
1397 * - encoding: Set by libavcodec.
1398 * - decoding: Set by libavcodec.
1399 */
1400 int has_b_frames;
1401
1402 /**
1403 * number of bytes per packet if constant and known or 0
1404 * Used by some WAV based audio codecs.
1405 */
1406 int block_align;
1407
1408 int parse_only; /* - decoding only: If true, only parsing is done
1409 (function avcodec_parse_frame()). The frame
1410 data is returned. Only MPEG codecs support this now. */
1411
1412 /**
1413 * 0-> h263 quant 1-> mpeg quant
1414 * - encoding: Set by user.
1415 * - decoding: unused
1416 */
1417 int mpeg_quant;
1418
1419 /**
1420 * pass1 encoding statistics output buffer
1421 * - encoding: Set by libavcodec.
1422 * - decoding: unused
1423 */
1424 char *stats_out;
1425
1426 /**
1427 * pass2 encoding statistics input buffer
1428 * Concatenated stuff from stats_out of pass1 should be placed here.
1429 * - encoding: Allocated/set/freed by user.
1430 * - decoding: unused
1431 */
1432 char *stats_in;
1433
1434 /**
1435 * ratecontrol qmin qmax limiting method
1436 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
1437 * - encoding: Set by user.
1438 * - decoding: unused
1439 */
1440 float rc_qsquish;
1441
1442 float rc_qmod_amp;
1443 int rc_qmod_freq;
1444
1445 /**
1446 * ratecontrol override, see RcOverride
1447 * - encoding: Allocated/set/freed by user.
1448 * - decoding: unused
1449 */
1450 RcOverride *rc_override;
1451 int rc_override_count;
1452
1453 /**
1454 * rate control equation
1455 * - encoding: Set by user
1456 * - decoding: unused
1457 */
1458 const char *rc_eq;
1459
1460 /**
1461 * maximum bitrate
1462 * - encoding: Set by user.
1463 * - decoding: unused
1464 */
1465 int rc_max_rate;
1466
1467 /**
1468 * minimum bitrate
1469 * - encoding: Set by user.
1470 * - decoding: unused
1471 */
1472 int rc_min_rate;
1473
1474 /**
1475 * decoder bitstream buffer size
1476 * - encoding: Set by user.
1477 * - decoding: unused
1478 */
1479 int rc_buffer_size;
1480 float rc_buffer_aggressivity;
1481
1482 /**
1483 * qscale factor between P and I-frames
1484 * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
1485 * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1486 * - encoding: Set by user.
1487 * - decoding: unused
1488 */
1489 float i_quant_factor;
1490
1491 /**
1492 * qscale offset between P and I-frames
1493 * - encoding: Set by user.
1494 * - decoding: unused
1495 */
1496 float i_quant_offset;
1497
1498 /**
1499 * initial complexity for pass1 ratecontrol
1500 * - encoding: Set by user.
1501 * - decoding: unused
1502 */
1503 float rc_initial_cplx;
1504
1505 /**
1506 * DCT algorithm, see FF_DCT_* below
1507 * - encoding: Set by user.
1508 * - decoding: unused
1509 */
1510 int dct_algo;
1511 #define FF_DCT_AUTO 0
1512 #define FF_DCT_FASTINT 1
1513 #define FF_DCT_INT 2
1514 #define FF_DCT_MMX 3
1515 #define FF_DCT_MLIB 4
1516 #define FF_DCT_ALTIVEC 5
1517 #define FF_DCT_FAAN 6
1518
1519 /**
1520 * luminance masking (0-> disabled)
1521 * - encoding: Set by user.
1522 * - decoding: unused
1523 */
1524 float lumi_masking;
1525
1526 /**
1527 * temporary complexity masking (0-> disabled)
1528 * - encoding: Set by user.
1529 * - decoding: unused
1530 */
1531 float temporal_cplx_masking;
1532
1533 /**
1534 * spatial complexity masking (0-> disabled)
1535 * - encoding: Set by user.
1536 * - decoding: unused
1537 */
1538 float spatial_cplx_masking;
1539
1540 /**
1541 * p block masking (0-> disabled)
1542 * - encoding: Set by user.
1543 * - decoding: unused
1544 */
1545 float p_masking;
1546
1547 /**
1548 * darkness masking (0-> disabled)
1549 * - encoding: Set by user.
1550 * - decoding: unused
1551 */
1552 float dark_masking;
1553
1554 /**
1555 * IDCT algorithm, see FF_IDCT_* below.
1556 * - encoding: Set by user.
1557 * - decoding: Set by user.
1558 */
1559 int idct_algo;
1560 #define FF_IDCT_AUTO 0
1561 #define FF_IDCT_INT 1
1562 #define FF_IDCT_SIMPLE 2
1563 #define FF_IDCT_SIMPLEMMX 3
1564 #define FF_IDCT_LIBMPEG2MMX 4
1565 #define FF_IDCT_PS2 5
1566 #define FF_IDCT_MLIB 6
1567 #define FF_IDCT_ARM 7
1568 #define FF_IDCT_ALTIVEC 8
1569 #define FF_IDCT_SH4 9
1570 #define FF_IDCT_SIMPLEARM 10
1571 #define FF_IDCT_H264 11
1572 #define FF_IDCT_VP3 12
1573 #define FF_IDCT_IPP 13
1574 #define FF_IDCT_XVIDMMX 14
1575 #define FF_IDCT_CAVS 15
1576 #define FF_IDCT_SIMPLEARMV5TE 16
1577 #define FF_IDCT_SIMPLEARMV6 17
1578 #define FF_IDCT_SIMPLEVIS 18
1579 #define FF_IDCT_WMV2 19
1580 #define FF_IDCT_FAAN 20
1581 #define FF_IDCT_EA 21
1582 #define FF_IDCT_SIMPLENEON 22
1583 #define FF_IDCT_SIMPLEALPHA 23
1584 #define FF_IDCT_BINK 24
1585
1586 /**
1587 * slice count
1588 * - encoding: Set by libavcodec.
1589 * - decoding: Set by user (or 0).
1590 */
1591 int slice_count;
1592 /**
1593 * slice offsets in the frame in bytes
1594 * - encoding: Set/allocated by libavcodec.
1595 * - decoding: Set/allocated by user (or NULL).
1596 */
1597 int *slice_offset;
1598
1599 /**
1600 * error concealment flags
1601 * - encoding: unused
1602 * - decoding: Set by user.
1603 */
1604 int error_concealment;
1605 #define FF_EC_GUESS_MVS 1
1606 #define FF_EC_DEBLOCK 2
1607
1608 /**
1609 * dsp_mask could be add used to disable unwanted CPU features
1610 * CPU features (i.e. MMX, SSE. ...)
1611 *
1612 * With the FORCE flag you may instead enable given CPU features.
1613 * (Dangerous: Usable in case of misdetection, improper usage however will
1614 * result into program crash.)
1615 */
1616 unsigned dsp_mask;
1617 #define FF_MM_FORCE 0x80000000 /* Force usage of selected flags (OR) */
1618 /* lower 16 bits - CPU features */
1619 #define FF_MM_MMX 0x0001 ///< standard MMX
1620 #define FF_MM_3DNOW 0x0004 ///< AMD 3DNOW
1621 #if LIBAVCODEC_VERSION_MAJOR < 53
1622 #define FF_MM_MMXEXT 0x0002 ///< SSE integer functions or AMD MMX ext
1623 #endif
1624 #define FF_MM_MMX2 0x0002 ///< SSE integer functions or AMD MMX ext
1625 #define FF_MM_SSE 0x0008 ///< SSE functions
1626 #define FF_MM_SSE2 0x0010 ///< PIV SSE2 functions
1627 #define FF_MM_3DNOWEXT 0x0020 ///< AMD 3DNowExt
1628 #define FF_MM_SSE3 0x0040 ///< Prescott SSE3 functions
1629 #define FF_MM_SSSE3 0x0080 ///< Conroe SSSE3 functions
1630 #define FF_MM_SSE4 0x0100 ///< Penryn SSE4.1 functions
1631 #define FF_MM_SSE42 0x0200 ///< Nehalem SSE4.2 functions
1632 #define FF_MM_IWMMXT 0x0100 ///< XScale IWMMXT
1633 #define FF_MM_ALTIVEC 0x0001 ///< standard AltiVec
1634
1635 /**
1636 * bits per sample/pixel from the demuxer (needed for huffyuv).
1637 * - encoding: Set by libavcodec.
1638 * - decoding: Set by user.
1639 */
1640 int bits_per_coded_sample;
1641
1642 /**
1643 * prediction method (needed for huffyuv)
1644 * - encoding: Set by user.
1645 * - decoding: unused
1646 */
1647 int prediction_method;
1648 #define FF_PRED_LEFT 0
1649 #define FF_PRED_PLANE 1
1650 #define FF_PRED_MEDIAN 2
1651
1652 /**
1653 * sample aspect ratio (0 if unknown)
1654 * That is the width of a pixel divided by the height of the pixel.
1655 * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
1656 * - encoding: Set by user.
1657 * - decoding: Set by libavcodec.
1658 */
1659 AVRational sample_aspect_ratio;
1660
1661 /**
1662 * the picture in the bitstream
1663 * - encoding: Set by libavcodec.
1664 * - decoding: Set by libavcodec.
1665 */
1666 AVFrame *coded_frame;
1667
1668 /**
1669 * debug
1670 * - encoding: Set by user.
1671 * - decoding: Set by user.
1672 */
1673 int debug;
1674 #define FF_DEBUG_PICT_INFO 1
1675 #define FF_DEBUG_RC 2
1676 #define FF_DEBUG_BITSTREAM 4
1677 #define FF_DEBUG_MB_TYPE 8
1678 #define FF_DEBUG_QP 16
1679 #define FF_DEBUG_MV 32
1680 #define FF_DEBUG_DCT_COEFF 0x00000040
1681 #define FF_DEBUG_SKIP 0x00000080
1682 #define FF_DEBUG_STARTCODE 0x00000100
1683 #define FF_DEBUG_PTS 0x00000200
1684 #define FF_DEBUG_ER 0x00000400
1685 #define FF_DEBUG_MMCO 0x00000800
1686 #define FF_DEBUG_BUGS 0x00001000
1687 #define FF_DEBUG_VIS_QP 0x00002000
1688 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1689 #define FF_DEBUG_BUFFERS 0x00008000
1690
1691 /**
1692 * debug
1693 * - encoding: Set by user.
1694 * - decoding: Set by user.
1695 */
1696 int debug_mv;
1697 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1698 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1699 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1700
1701 /**
1702 * error
1703 * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
1704 * - decoding: unused
1705 */
1706 uint64_t error[4];
1707
1708 /**
1709 * minimum MB quantizer
1710 * - encoding: unused
1711 * - decoding: unused
1712 */
1713 int mb_qmin;
1714
1715 /**
1716 * maximum MB quantizer
1717 * - encoding: unused
1718 * - decoding: unused
1719 */
1720 int mb_qmax;
1721
1722 /**
1723 * motion estimation comparison function
1724 * - encoding: Set by user.
1725 * - decoding: unused
1726 */
1727 int me_cmp;
1728 /**
1729 * subpixel motion estimation comparison function
1730 * - encoding: Set by user.
1731 * - decoding: unused
1732 */
1733 int me_sub_cmp;
1734 /**
1735 * macroblock comparison function (not supported yet)
1736 * - encoding: Set by user.
1737 * - decoding: unused
1738 */
1739 int mb_cmp;
1740 /**
1741 * interlaced DCT comparison function
1742 * - encoding: Set by user.
1743 * - decoding: unused
1744 */
1745 int ildct_cmp;
1746 #define FF_CMP_SAD 0
1747 #define FF_CMP_SSE 1
1748 #define FF_CMP_SATD 2
1749 #define FF_CMP_DCT 3
1750 #define FF_CMP_PSNR 4
1751 #define FF_CMP_BIT 5
1752 #define FF_CMP_RD 6
1753 #define FF_CMP_ZERO 7
1754 #define FF_CMP_VSAD 8
1755 #define FF_CMP_VSSE 9
1756 #define FF_CMP_NSSE 10
1757 #define FF_CMP_W53 11
1758 #define FF_CMP_W97 12
1759 #define FF_CMP_DCTMAX 13
1760 #define FF_CMP_DCT264 14
1761 #define FF_CMP_CHROMA 256
1762
1763 /**
1764 * ME diamond size & shape
1765 * - encoding: Set by user.
1766 * - decoding: unused
1767 */
1768 int dia_size;
1769
1770 /**
1771 * amount of previous MV predictors (2a+1 x 2a+1 square)
1772 * - encoding: Set by user.
1773 * - decoding: unused
1774 */
1775 int last_predictor_count;
1776
1777 /**
1778 * prepass for motion estimation
1779 * - encoding: Set by user.
1780 * - decoding: unused
1781 */
1782 int pre_me;
1783
1784 /**
1785 * motion estimation prepass comparison function
1786 * - encoding: Set by user.
1787 * - decoding: unused
1788 */
1789 int me_pre_cmp;
1790
1791 /**
1792 * ME prepass diamond size & shape
1793 * - encoding: Set by user.
1794 * - decoding: unused
1795 */
1796 int pre_dia_size;
1797
1798 /**
1799 * subpel ME quality
1800 * - encoding: Set by user.
1801 * - decoding: unused
1802 */
1803 int me_subpel_quality;
1804
1805 /**
1806 * callback to negotiate the pixelFormat
1807 * @param fmt is the list of formats which are supported by the codec,
1808 * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
1809 * The first is always the native one.
1810 * @return the chosen format
1811 * - encoding: unused
1812 * - decoding: Set by user, if not set the native format will be chosen.
1813 */
1814 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1815
1816 /**
1817 * DTG active format information (additional aspect ratio
1818 * information only used in DVB MPEG-2 transport streams)
1819 * 0 if not set.
1820 *
1821 * - encoding: unused
1822 * - decoding: Set by decoder.
1823 */
1824 int dtg_active_format;
1825 #define FF_DTG_AFD_SAME 8
1826 #define FF_DTG_AFD_4_3 9
1827 #define FF_DTG_AFD_16_9 10
1828 #define FF_DTG_AFD_14_9 11
1829 #define FF_DTG_AFD_4_3_SP_14_9 13
1830 #define FF_DTG_AFD_16_9_SP_14_9 14
1831 #define FF_DTG_AFD_SP_4_3 15
1832
1833 /**
1834 * maximum motion estimation search range in subpel units
1835 * If 0 then no limit.
1836 *
1837 * - encoding: Set by user.
1838 * - decoding: unused
1839 */
1840 int me_range;
1841
1842 /**
1843 * intra quantizer bias
1844 * - encoding: Set by user.
1845 * - decoding: unused
1846 */
1847 int intra_quant_bias;
1848 #define FF_DEFAULT_QUANT_BIAS 999999
1849
1850 /**
1851 * inter quantizer bias
1852 * - encoding: Set by user.
1853 * - decoding: unused
1854 */
1855 int inter_quant_bias;
1856
1857 /**
1858 * color table ID
1859 * - encoding: unused
1860 * - decoding: Which clrtable should be used for 8bit RGB images.
1861 * Tables have to be stored somewhere. FIXME
1862 */
1863 int color_table_id;
1864
1865 /**
1866 * internal_buffer count
1867 * Don't touch, used by libavcodec default_get_buffer().
1868 */
1869 int internal_buffer_count;
1870
1871 /**
1872 * internal_buffers
1873 * Don't touch, used by libavcodec default_get_buffer().
1874 */
1875 void *internal_buffer;
1876
1877 #define FF_LAMBDA_SHIFT 7
1878 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1879 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1880 #define FF_LAMBDA_MAX (256*128-1)
1881
1882 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1883 /**
1884 * Global quality for codecs which cannot change it per frame.
1885 * This should be proportional to MPEG-1/2/4 qscale.
1886 * - encoding: Set by user.
1887 * - decoding: unused
1888 */
1889 int global_quality;
1890
1891 #define FF_CODER_TYPE_VLC 0
1892 #define FF_CODER_TYPE_AC 1
1893 #define FF_CODER_TYPE_RAW 2
1894 #define FF_CODER_TYPE_RLE 3
1895 #define FF_CODER_TYPE_DEFLATE 4
1896 /**
1897 * coder type
1898 * - encoding: Set by user.
1899 * - decoding: unused
1900 */
1901 int coder_type;
1902
1903 /**
1904 * context model
1905 * - encoding: Set by user.
1906 * - decoding: unused
1907 */
1908 int context_model;
1909 #if 0
1910 /**
1911 *
1912 * - encoding: unused
1913 * - decoding: Set by user.
1914 */
1915 uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1916 #endif
1917
1918 /**
1919 * slice flags
1920 * - encoding: unused
1921 * - decoding: Set by user.
1922 */
1923 int slice_flags;
1924 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1925 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1926 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1927
1928 /**
1929 * XVideo Motion Acceleration
1930 * - encoding: forbidden
1931 * - decoding: set by decoder
1932 */
1933 int xvmc_acceleration;
1934
1935 /**
1936 * macroblock decision mode
1937 * - encoding: Set by user.
1938 * - decoding: unused
1939 */
1940 int mb_decision;
1941 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1942 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1943 #define FF_MB_DECISION_RD 2 ///< rate distortion
1944
1945 /**
1946 * custom intra quantization matrix
1947 * - encoding: Set by user, can be NULL.
1948 * - decoding: Set by libavcodec.
1949 */
1950 uint16_t *intra_matrix;
1951
1952 /**
1953 * custom inter quantization matrix
1954 * - encoding: Set by user, can be NULL.
1955 * - decoding: Set by libavcodec.
1956 */
1957 uint16_t *inter_matrix;
1958
1959 /**
1960 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1961 * This is used to work around some encoder bugs.
1962 * - encoding: unused
1963 * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1964 */
1965 unsigned int stream_codec_tag;
1966
1967 /**
1968 * scene change detection threshold
1969 * 0 is default, larger means fewer detected scene changes.
1970 * - encoding: Set by user.
1971 * - decoding: unused
1972 */
1973 int scenechange_threshold;
1974
1975 /**
1976 * minimum Lagrange multipler
1977 * - encoding: Set by user.
1978 * - decoding: unused
1979 */
1980 int lmin;
1981
1982 /**
1983 * maximum Lagrange multipler
1984 * - encoding: Set by user.
1985 * - decoding: unused
1986 */
1987 int lmax;
1988
1989 /**
1990 * palette control structure
1991 * - encoding: ??? (no palette-enabled encoder yet)
1992 * - decoding: Set by user.
1993 */
1994 struct AVPaletteControl *palctrl;
1995
1996 /**
1997 * noise reduction strength
1998 * - encoding: Set by user.
1999 * - decoding: unused
2000 */
2001 int noise_reduction;
2002
2003 /**
2004 * Called at the beginning of a frame to get cr buffer for it.
2005 * Buffer type (size, hints) must be the same. libavcodec won't check it.
2006 * libavcodec will pass previous buffer in pic, function should return
2007 * same buffer or new buffer with old frame "painted" into it.
2008 * If pic.data[0] == NULL must behave like get_buffer().
2009 * if CODEC_CAP_DR1 is not set then reget_buffer() must call
2010 * avcodec_default_reget_buffer() instead of providing buffers allocated by
2011 * some other means.
2012 * - encoding: unused
2013 * - decoding: Set by libavcodec., user can override
2014 */
2015 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
2016
2017 /**
2018 * Number of bits which should be loaded into the rc buffer before decoding starts.
2019 * - encoding: Set by user.
2020 * - decoding: unused
2021 */
2022 int rc_initial_buffer_occupancy;
2023
2024 /**
2025 *
2026 * - encoding: Set by user.
2027 * - decoding: unused
2028 */
2029 int inter_threshold;
2030
2031 /**
2032 * CODEC_FLAG2_*
2033 * - encoding: Set by user.
2034 * - decoding: Set by user.
2035 */
2036 int flags2;
2037
2038 /**
2039 * Simulates errors in the bitstream to test error concealment.
2040 * - encoding: Set by user.
2041 * - decoding: unused
2042 */
2043 int error_rate;
2044
2045 /**
2046 * MP3 antialias algorithm, see FF_AA_* below.
2047 * - encoding: unused
2048 * - decoding: Set by user.
2049 */
2050 int antialias_algo;
2051 #define FF_AA_AUTO 0
2052 #define FF_AA_FASTINT 1 //not implemented yet
2053 #define FF_AA_INT 2
2054 #define FF_AA_FLOAT 3
2055 /**
2056 * quantizer noise shaping
2057 * - encoding: Set by user.
2058 * - decoding: unused
2059 */
2060 int quantizer_noise_shaping;
2061
2062 /**
2063 * thread count
2064 * is used to decide how many independent tasks should be passed to execute()
2065 * - encoding: Set by user.
2066 * - decoding: Set by user.
2067 */
2068 int thread_count;
2069
2070 /**
2071 * The codec may call this to execute several independent things.
2072 * It will return only after finishing all tasks.
2073 * The user may replace this with some multithreaded implementation,
2074 * the default implementation will execute the parts serially.
2075 * @param count the number of things to execute
2076 * - encoding: Set by libavcodec, user can override.
2077 * - decoding: Set by libavcodec, user can override.
2078 */
2079 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size);
2080
2081 /**
2082 * thread opaque
2083 * Can be used by execute() to store some per AVCodecContext stuff.
2084 * - encoding: set by execute()
2085 * - decoding: set by execute()
2086 */
2087 void *thread_opaque;
2088
2089 /**
2090 * Motion estimation threshold below which no motion estimation is
2091 * performed, but instead the user specified motion vectors are used.
2092 *
2093 * - encoding: Set by user.
2094 * - decoding: unused
2095 */
2096 int me_threshold;
2097
2098 /**
2099 * Macroblock threshold below which the user specified macroblock types will be used.
2100 * - encoding: Set by user.
2101 * - decoding: unused
2102 */
2103 int mb_threshold;
2104
2105 /**
2106 * precision of the intra DC coefficient - 8
2107 * - encoding: Set by user.
2108 * - decoding: unused
2109 */
2110 int intra_dc_precision;
2111
2112 /**
2113 * noise vs. sse weight for the nsse comparsion function
2114 * - encoding: Set by user.
2115 * - decoding: unused
2116 */
2117 int nsse_weight;
2118
2119 /**
2120 * Number of macroblock rows at the top which are skipped.
2121 * - encoding: unused
2122 * - decoding: Set by user.
2123 */
2124 int skip_top;
2125
2126 /**
2127 * Number of macroblock rows at the bottom which are skipped.
2128 * - encoding: unused
2129 * - decoding: Set by user.
2130 */
2131 int skip_bottom;
2132
2133 /**
2134 * profile
2135 * - encoding: Set by user.
2136 * - decoding: Set by libavcodec.
2137 */
2138 int profile;
2139 #define FF_PROFILE_UNKNOWN -99
2140
2141 #define FF_PROFILE_AAC_MAIN 0
2142 #define FF_PROFILE_AAC_LOW 1
2143 #define FF_PROFILE_AAC_SSR 2
2144 #define FF_PROFILE_AAC_LTP 3
2145
2146 #define FF_PROFILE_H264_BASELINE 66
2147 #define FF_PROFILE_H264_MAIN 77
2148 #define FF_PROFILE_H264_EXTENDED 88
2149 #define FF_PROFILE_H264_HIGH 100
2150 #define FF_PROFILE_H264_HIGH_10 110
2151 #define FF_PROFILE_H264_HIGH_422 122
2152 #define FF_PROFILE_H264_HIGH_444 244
2153 #define FF_PROFILE_H264_CAVLC_444 44
2154
2155 /**
2156 * level
2157 * - encoding: Set by user.
2158 * - decoding: Set by libavcodec.
2159 */
2160 int level;
2161 #define FF_LEVEL_UNKNOWN -99
2162
2163 /**
2164 * low resolution decoding, 1-> 1/2 size, 2->1/4 size
2165 * - encoding: unused
2166 * - decoding: Set by user.
2167 */
2168 int lowres;
2169
2170 /**
2171 * Bitstream width / height, may be different from width/height if lowres
2172 * or other things are used.
2173 * - encoding: unused
2174 * - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
2175 */
2176 int coded_width, coded_height;
2177
2178 /**
2179 * frame skip threshold
2180 * - encoding: Set by user.
2181 * - decoding: unused
2182 */
2183 int frame_skip_threshold;
2184
2185 /**
2186 * frame skip factor
2187 * - encoding: Set by user.
2188 * - decoding: unused
2189 */
2190 int frame_skip_factor;
2191
2192 /**
2193 * frame skip exponent
2194 * - encoding: Set by user.
2195 * - decoding: unused
2196 */
2197 int frame_skip_exp;
2198
2199 /**
2200 * frame skip comparison function
2201 * - encoding: Set by user.
2202 * - decoding: unused
2203 */
2204 int frame_skip_cmp;
2205
2206 /**
2207 * Border processing masking, raises the quantizer for mbs on the borders
2208 * of the picture.
2209 * - encoding: Set by user.
2210 * - decoding: unused
2211 */
2212 float border_masking;
2213
2214 /**
2215 * minimum MB lagrange multipler
2216 * - encoding: Set by user.
2217 * - decoding: unused
2218 */
2219 int mb_lmin;
2220
2221 /**
2222 * maximum MB lagrange multipler
2223 * - encoding: Set by user.
2224 * - decoding: unused
2225 */
2226 int mb_lmax;
2227
2228 /**
2229 *
2230 * - encoding: Set by user.
2231 * - decoding: unused
2232 */
2233 int me_penalty_compensation;
2234
2235 /**
2236 *
2237 * - encoding: unused
2238 * - decoding: Set by user.
2239 */
2240 enum AVDiscard skip_loop_filter;
2241
2242 /**
2243 *
2244 * - encoding: unused
2245 * - decoding: Set by user.
2246 */
2247 enum AVDiscard skip_idct;
2248
2249 /**
2250 *
2251 * - encoding: unused
2252 * - decoding: Set by user.
2253 */
2254 enum AVDiscard skip_frame;
2255
2256 /**
2257 *
2258 * - encoding: Set by user.
2259 * - decoding: unused
2260 */
2261 int bidir_refine;
2262
2263 /**
2264 *
2265 * - encoding: Set by user.
2266 * - decoding: unused
2267 */
2268 int brd_scale;
2269
2270 /**
2271 * constant rate factor - quality-based VBR - values ~correspond to qps
2272 * - encoding: Set by user.
2273 * - decoding: unused
2274 */
2275 float crf;
2276
2277 /**
2278 * constant quantization parameter rate control method
2279 * - encoding: Set by user.
2280 * - decoding: unused
2281 */
2282 int cqp;
2283
2284 /**
2285 * minimum GOP size
2286 * - encoding: Set by user.
2287 * - decoding: unused
2288 */
2289 int keyint_min;
2290
2291 /**
2292 * number of reference frames
2293 * - encoding: Set by user.
2294 * - decoding: Set by lavc.
2295 */
2296 int refs;
2297
2298 /**
2299 * chroma qp offset from luma
2300 * - encoding: Set by user.
2301 * - decoding: unused
2302 */
2303 int chromaoffset;
2304
2305 /**
2306 * Influences how often B-frames are used.
2307 * - encoding: Set by user.
2308 * - decoding: unused
2309 */
2310 int bframebias;
2311
2312 /**
2313 * trellis RD quantization
2314 * - encoding: Set by user.
2315 * - decoding: unused
2316 */
2317 int trellis;
2318
2319 /**
2320 * Reduce fluctuations in qp (before curve compression).
2321 * - encoding: Set by user.
2322 * - decoding: unused
2323 */
2324 float complexityblur;
2325
2326 /**
2327 * in-loop deblocking filter alphac0 parameter
2328 * alpha is in the range -6...6
2329 * - encoding: Set by user.
2330 * - decoding: unused
2331 */
2332 int deblockalpha;
2333
2334 /**
2335 * in-loop deblocking filter beta parameter
2336 * beta is in the range -6...6
2337 * - encoding: Set by user.
2338 * - decoding: unused
2339 */
2340 int deblockbeta;
2341
2342 /**
2343 * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
2344 * - encoding: Set by user.
2345 * - decoding: unused
2346 */
2347 int partitions;
2348 #define X264_PART_I4X4 0x001 /* Analyze i4x4 */
2349 #define X264_PART_I8X8 0x002 /* Analyze i8x8 (requires 8x8 transform) */
2350 #define X264_PART_P8X8 0x010 /* Analyze p16x8, p8x16 and p8x8 */
2351 #define X264_PART_P4X4 0x020 /* Analyze p8x4, p4x8, p4x4 */
2352 #define X264_PART_B8X8 0x100 /* Analyze b16x8, b8x16 and b8x8 */
2353
2354 /**
2355 * direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal), 3 (auto)
2356 * - encoding: Set by user.
2357 * - decoding: unused
2358 */
2359 int directpred;
2360
2361 /**
2362 * Audio cutoff bandwidth (0 means "automatic")
2363 * - encoding: Set by user.
2364 * - decoding: unused
2365 */
2366 int cutoff;
2367
2368 /**
2369 * Multiplied by qscale for each frame and added to scene_change_score.
2370 * - encoding: Set by user.
2371 * - decoding: unused
2372 */
2373 int scenechange_factor;
2374
2375 /**
2376 *
2377 * Note: Value depends upon the compare function used for fullpel ME.
2378 * - encoding: Set by user.
2379 * - decoding: unused
2380 */
2381 int mv0_threshold;
2382
2383 /**
2384 * Adjusts sensitivity of b_frame_strategy 1.
2385 * - encoding: Set by user.
2386 * - decoding: unused
2387 */
2388 int b_sensitivity;
2389
2390 /**
2391 * - encoding: Set by user.
2392 * - decoding: unused
2393 */
2394 int compression_level;
2395 #define FF_COMPRESSION_DEFAULT -1
2396
2397 /**
2398 * Sets whether to use LPC mode - used by FLAC encoder.
2399 * - encoding: Set by user.
2400 * - decoding: unused
2401 */
2402 int use_lpc;
2403
2404 /**
2405 * LPC coefficient precision - used by FLAC encoder
2406 * - encoding: Set by user.
2407 * - decoding: unused
2408 */
2409 int lpc_coeff_precision;
2410
2411 /**
2412 * - encoding: Set by user.
2413 * - decoding: unused
2414 */
2415 int min_prediction_order;
2416
2417 /**
2418 * - encoding: Set by user.
2419 * - decoding: unused
2420 */
2421 int max_prediction_order;
2422
2423 /**
2424 * search method for selecting prediction order
2425 * - encoding: Set by user.
2426 * - decoding: unused
2427 */
2428 int prediction_order_method;
2429
2430 /**
2431 * - encoding: Set by user.
2432 * - decoding: unused
2433 */
2434 int min_partition_order;
2435
2436 /**
2437 * - encoding: Set by user.
2438 * - decoding: unused
2439 */
2440 int max_partition_order;
2441
2442 /**
2443 * GOP timecode frame start number, in non drop frame format
2444 * - encoding: Set by user.
2445 * - decoding: unused
2446 */
2447 int64_t timecode_frame_start;
2448
2449 #if LIBAVCODEC_VERSION_MAJOR < 53
2450 /**
2451 * Decoder should decode to this many channels if it can (0 for default)
2452 * - encoding: unused
2453 * - decoding: Set by user.
2454 * @deprecated Deprecated in favor of request_channel_layout.
2455 */
2456 int request_channels;
2457 #endif
2458
2459 /**
2460 * Percentage of dynamic range compression to be applied by the decoder.
2461 * The default value is 1.0, corresponding to full compression.
2462 * - encoding: unused
2463 * - decoding: Set by user.
2464 */
2465 float drc_scale;
2466
2467 /**
2468 * opaque 64bit number (generally a PTS) that will be reordered and
2469 * output in AVFrame.reordered_opaque
2470 * - encoding: unused
2471 * - decoding: Set by user.
2472 */
2473 int64_t reordered_opaque;
2474
2475 /**
2476 * Bits per sample/pixel of internal libavcodec pixel/sample format.
2477 * This field is applicable only when sample_fmt is SAMPLE_FMT_S32.
2478 * - encoding: set by user.
2479 * - decoding: set by libavcodec.
2480 */
2481 int bits_per_raw_sample;
2482
2483 /**
2484 * Audio channel layout.
2485 * - encoding: set by user.
2486 * - decoding: set by libavcodec.
2487 */
2488 int64_t channel_layout;
2489
2490 /**
2491 * Request decoder to use this channel layout if it can (0 for default)
2492 * - encoding: unused
2493 * - decoding: Set by user.
2494 */
2495 int64_t request_channel_layout;
2496
2497 /**
2498 * Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow.
2499 * - encoding: Set by user.
2500 * - decoding: unused.
2501 */
2502 float rc_max_available_vbv_use;
2503
2504 /**
2505 * Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow.
2506 * - encoding: Set by user.
2507 * - decoding: unused.
2508 */
2509 float rc_min_vbv_overflow_use;
2510
2511 /**
2512 * Hardware accelerator in use
2513 * - encoding: unused.
2514 * - decoding: Set by libavcodec
2515 */
2516 struct AVHWAccel *hwaccel;
2517
2518 /**
2519 * For some codecs, the time base is closer to the field rate than the frame rate.
2520 * Most notably, H.264 and MPEG-2 specify time_base as half of frame duration
2521 * if no telecine is used ...
2522 *
2523 * Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2.
2524 */
2525 int ticks_per_frame;
2526
2527 /**
2528 * Hardware accelerator context.
2529 * For some hardware accelerators, a global context needs to be
2530 * provided by the user. In that case, this holds display-dependent
2531 * data FFmpeg cannot instantiate itself. Please refer to the
2532 * FFmpeg HW accelerator documentation to know how to fill this
2533 * is. e.g. for VA API, this is a struct vaapi_context.
2534 * - encoding: unused
2535 * - decoding: Set by user
2536 */
2537 void *hwaccel_context;
2538
2539 /**
2540 * Chromaticity coordinates of the source primaries.
2541 * - encoding: Set by user
2542 * - decoding: Set by libavcodec
2543 */
2544 enum AVColorPrimaries color_primaries;
2545
2546 /**
2547 * Color Transfer Characteristic.
2548 * - encoding: Set by user
2549 * - decoding: Set by libavcodec
2550 */
2551 enum AVColorTransferCharacteristic color_trc;
2552
2553 /**
2554 * YUV colorspace type.
2555 * - encoding: Set by user
2556 * - decoding: Set by libavcodec
2557 */
2558 enum AVColorSpace colorspace;
2559
2560 /**
2561 * MPEG vs JPEG YUV range.
2562 * - encoding: Set by user
2563 * - decoding: Set by libavcodec
2564 */
2565 enum AVColorRange color_range;
2566
2567 /**
2568 * This defines the location of chroma samples.
2569 * - encoding: Set by user
2570 * - decoding: Set by libavcodec
2571 */
2572 enum AVChromaLocation chroma_sample_location;
2573
2574 /**
2575 * The codec may call this to execute several independent things.
2576 * It will return only after finishing all tasks.
2577 * The user may replace this with some multithreaded implementation,
2578 * the default implementation will execute the parts serially.
2579 * Also see avcodec_thread_init and e.g. the --enable-pthread configure option.
2580 * @param c context passed also to func
2581 * @param count the number of things to execute
2582 * @param arg2 argument passed unchanged to func
2583 * @param ret return values of executed functions, must have space for "count" values. May be NULL.
2584 * @param func function that will be called count times, with jobnr from 0 to count-1.
2585 * threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no
2586 * two instances of func executing at the same time will have the same threadnr.
2587 * @return always 0 currently, but code should handle a future improvement where when any call to func
2588 * returns < 0 no further calls to func may be done and < 0 is returned.
2589 * - encoding: Set by libavcodec, user can override.
2590 * - decoding: Set by libavcodec, user can override.
2591 */
2592 int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count);
2593
2594 /**
2595 * explicit P-frame weighted prediction analysis method
2596 * 0: off
2597 * 1: fast blind weighting (one reference duplicate with -1 offset)
2598 * 2: smart weighting (full fade detection analysis)
2599 * - encoding: Set by user.
2600 * - decoding: unused
2601 */
2602 int weighted_p_pred;
2603
2604 /**
2605 * AQ mode
2606 * 0: Disabled
2607 * 1: Variance AQ (complexity mask)
2608 * 2: Auto-variance AQ (experimental)
2609 * - encoding: Set by user
2610 * - decoding: unused
2611 */
2612 int aq_mode;
2613
2614 /**
2615 * AQ strength
2616 * Reduces blocking and blurring in flat and textured areas.
2617 * - encoding: Set by user
2618 * - decoding: unused
2619 */
2620 float aq_strength;
2621
2622 /**
2623 * PSY RD
2624 * Strength of psychovisual optimization
2625 * - encoding: Set by user
2626 * - decoding: unused
2627 */
2628 float psy_rd;
2629
2630 /**
2631 * PSY trellis
2632 * Strength of psychovisual optimization
2633 * - encoding: Set by user
2634 * - decoding: unused
2635 */
2636 float psy_trellis;
2637
2638 /**
2639 * RC lookahead
2640 * Number of frames for frametype and ratecontrol lookahead
2641 * - encoding: Set by user
2642 * - decoding: unused
2643 */
2644 int rc_lookahead;
2645 } AVCodecContext;
2646
2647 /**
2648 * AVCodec.
2649 */
2650 typedef struct AVCodec {
2651 /**
2652 * Name of the codec implementation.
2653 * The name is globally unique among encoders and among decoders (but an
2654 * encoder and a decoder can share the same name).
2655 * This is the primary way to find a codec from the user perspective.
2656 */
2657 const char *name;
2658 enum CodecType type;
2659 enum CodecID id;
2660 int priv_data_size;
2661 int (*init)(AVCodecContext *);
2662 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2663 int (*close)(AVCodecContext *);
2664 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt);
2665 /**
2666 * Codec capabilities.
2667 * see CODEC_CAP_*
2668 */
2669 int capabilities;
2670 struct AVCodec *next;
2671 /**
2672 * Flush buffers.
2673 * Will be called when seeking
2674 */
2675 void (*flush)(AVCodecContext *);
2676 const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0}
2677 const enum PixelFormat *pix_fmts; ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1
2678 /**
2679 * Descriptive name for the codec, meant to be more human readable than name.
2680 * You should use the NULL_IF_CONFIG_SMALL() macro to define it.
2681 */
2682 const char *long_name;
2683 const int *supported_samplerates; ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
2684 const enum SampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1
2685 const int64_t *channel_layouts; ///< array of support channel layouts, or NULL if unknown. array is terminated by 0
2686 } AVCodec;
2687
2688 /**
2689 * AVHWAccel.
2690 */
2691 typedef struct AVHWAccel {
2692 /**
2693 * Name of the hardware accelerated codec.
2694 * The name is globally unique among encoders and among decoders (but an
2695 * encoder and a decoder can share the same name).
2696 */
2697 const char *name;
2698
2699 /**
2700 * Type of codec implemented by the hardware accelerator.
2701 *
2702 * See CODEC_TYPE_xxx
2703 */
2704 enum CodecType type;
2705
2706 /**
2707 * Codec implemented by the hardware accelerator.
2708 *
2709 * See CODEC_ID_xxx
2710 */
2711 enum CodecID id;
2712
2713 /**
2714 * Supported pixel format.
2715 *
2716 * Only hardware accelerated formats are supported here.
2717 */
2718 enum PixelFormat pix_fmt;
2719
2720 /**
2721 * Hardware accelerated codec capabilities.
2722 * see FF_HWACCEL_CODEC_CAP_*
2723 */
2724 int capabilities;
2725
2726 struct AVHWAccel *next;
2727
2728 /**
2729 * Called at the beginning of each frame or field picture.
2730 *
2731 * Meaningful frame information (codec specific) is guaranteed to
2732 * be parsed at this point. This function is mandatory.
2733 *
2734 * Note that buf can be NULL along with buf_size set to 0.
2735 * Otherwise, this means the whole frame is available at this point.
2736 *
2737 * @param avctx the codec context
2738 * @param buf the frame data buffer base
2739 * @param buf_size the size of the frame in bytes
2740 * @return zero if successful, a negative value otherwise
2741 */
2742 int (*start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
2743
2744 /**
2745 * Callback for each slice.
2746 *
2747 * Meaningful slice information (codec specific) is guaranteed to
2748 * be parsed at this point. This function is mandatory.
2749 *
2750 * @param avctx the codec context
2751 * @param buf the slice data buffer base
2752 * @param buf_size the size of the slice in bytes
2753 * @return zero if successful, a negative value otherwise
2754 */
2755 int (*decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
2756
2757 /**
2758 * Called at the end of each frame or field picture.
2759 *
2760 * The whole picture is parsed at this point and can now be sent
2761 * to the hardware accelerator. This function is mandatory.
2762 *
2763 * @param avctx the codec context
2764 * @return zero if successful, a negative value otherwise
2765 */
2766 int (*end_frame)(AVCodecContext *avctx);
2767
2768 /**
2769 * Size of HW accelerator private data.
2770 *
2771 * Private data is allocated with av_mallocz() before
2772 * AVCodecContext.get_buffer() and deallocated after
2773 * AVCodecContext.release_buffer().
2774 */
2775 int priv_data_size;
2776 } AVHWAccel;
2777
2778 /**
2779 * four components are given, that's all.
2780 * the last component is alpha
2781 */
2782 typedef struct AVPicture {
2783 uint8_t *data[4];
2784 int linesize[4]; ///< number of bytes per line
2785 } AVPicture;
2786
2787 #if LIBAVCODEC_VERSION_MAJOR < 53
2788 /**
2789 * AVPaletteControl
2790 * This structure defines a method for communicating palette changes
2791 * between and demuxer and a decoder.
2792 *
2793 * @deprecated Use AVPacket to send palette changes instead.
2794 * This is totally broken.
2795 */
2796 #define AVPALETTE_SIZE 1024
2797 #define AVPALETTE_COUNT 256
2798 typedef struct AVPaletteControl {
2799
2800 /* Demuxer sets this to 1 to indicate the palette has changed;
2801 * decoder resets to 0. */
2802 int palette_changed;
2803
2804 /* 4-byte ARGB palette entries, stored in native byte order; note that
2805 * the individual palette components should be on a 8-bit scale; if
2806 * the palette data comes from an IBM VGA native format, the component
2807 * data is probably 6 bits in size and needs to be scaled. */
2808 unsigned int palette[AVPALETTE_COUNT];
2809
2810 } AVPaletteControl attribute_deprecated;
2811 #endif
2812
2813 enum AVSubtitleType {
2814 SUBTITLE_NONE,
2815
2816 SUBTITLE_BITMAP, ///< A bitmap, pict will be set
2817
2818 /**
2819 * Plain text, the text field must be set by the decoder and is
2820 * authoritative. ass and pict fields may contain approximations.
2821 */
2822 SUBTITLE_TEXT,
2823
2824 /**
2825 * Formatted text, the ass field must be set by the decoder and is
2826 * authoritative. pict and text fields may contain approximations.
2827 */
2828 SUBTITLE_ASS,
2829 };
2830
2831 typedef struct AVSubtitleRect {
2832 int x; ///< top left corner of pict, undefined when pict is not set
2833 int y; ///< top left corner of pict, undefined when pict is not set
2834 int w; ///< width of pict, undefined when pict is not set
2835 int h; ///< height of pict, undefined when pict is not set
2836 int nb_colors; ///< number of colors in pict, undefined when pict is not set
2837
2838 /**
2839 * data+linesize for the bitmap of this subtitle.
2840 * can be set for text/ass as well once they where rendered
2841 */
2842 AVPicture pict;
2843 enum AVSubtitleType type;
2844
2845 char *text; ///< 0 terminated plain UTF-8 text
2846
2847 /**
2848 * 0 terminated ASS/SSA compatible event line.
2849 * The pressentation of this is unaffected by the other values in this
2850 * struct.
2851 */
2852 char *ass;
2853 } AVSubtitleRect;
2854
2855 typedef struct AVSubtitle {
2856 uint16_t format; /* 0 = graphics */
2857 uint32_t start_display_time; /* relative to packet pts, in ms */
2858 uint32_t end_display_time; /* relative to packet pts, in ms */
2859 unsigned num_rects;
2860 AVSubtitleRect **rects;
2861 int64_t pts; ///< Same as packet pts, in AV_TIME_BASE
2862 } AVSubtitle;
2863
2864 /* packet functions */
2865
2866 /**
2867 * @deprecated use NULL instead
2868 */
2869 attribute_deprecated void av_destruct_packet_nofree(AVPacket *pkt);
2870
2871 /**
2872 * Default packet destructor.
2873 */
2874 void av_destruct_packet(AVPacket *pkt);
2875
2876 /**
2877 * Initialize optional fields of a packet with default values.
2878 *
2879 * @param pkt packet
2880 */
2881 void av_init_packet(AVPacket *pkt);
2882
2883 /**
2884 * Allocate the payload of a packet and initialize its fields with
2885 * default values.
2886 *
2887 * @param pkt packet
2888 * @param size wanted payload size
2889 * @return 0 if OK, AVERROR_xxx otherwise
2890 */
2891 int av_new_packet(AVPacket *pkt, int size);
2892
2893 /**
2894 * Reduce packet size, correctly zeroing padding
2895 *
2896 * @param pkt packet
2897 * @param size new size
2898 */
2899 void av_shrink_packet(AVPacket *pkt, int size);
2900
2901 /**
2902 * @warning This is a hack - the packet memory allocation stuff is broken. The
2903 * packet is allocated if it was not really allocated.
2904 */
2905 int av_dup_packet(AVPacket *pkt);
2906
2907 /**
2908 * Free a packet.
2909 *
2910 * @param pkt packet to free
2911 */
2912 void av_free_packet(AVPacket *pkt);
2913
2914 /* resample.c */
2915
2916 struct ReSampleContext;
2917 struct AVResampleContext;
2918
2919 typedef struct ReSampleContext ReSampleContext;
2920
2921 #if LIBAVCODEC_VERSION_MAJOR < 53
2922 /**
2923 * @deprecated Use av_audio_resample_init() instead.
2924 */
2925 attribute_deprecated ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2926 int output_rate, int input_rate);
2927 #endif
2928 /**
2929 * Initializes audio resampling context
2930 *
2931 * @param output_channels number of output channels
2932 * @param input_channels number of input channels
2933 * @param output_rate output sample rate
2934 * @param input_rate input sample rate
2935 * @param sample_fmt_out requested output sample format
2936 * @param sample_fmt_in input sample format
2937 * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
2938 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
2939 * @param linear If 1 then the used FIR filter will be linearly interpolated
2940 between the 2 closest, if 0 the closest will be used
2941 * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
2942 * @return allocated ReSampleContext, NULL if error occured
2943 */
2944 ReSampleContext *av_audio_resample_init(int output_channels, int input_channels,
2945 int output_rate, int input_rate,
2946 enum SampleFormat sample_fmt_out,
2947 enum SampleFormat sample_fmt_in,
2948 int filter_length, int log2_phase_count,
2949 int linear, double cutoff);
2950
2951 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2952 void audio_resample_close(ReSampleContext *s);
2953
2954
2955 /**
2956 * Initializes an audio resampler.
2957 * Note, if either rate is not an integer then simply scale both rates up so they are.
2958 * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
2959 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
2960 * @param linear If 1 then the used FIR filter will be linearly interpolated
2961 between the 2 closest, if 0 the closest will be used
2962 * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
2963 */
2964 struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2965
2966 /**
2967 * resamples.
2968 * @param src an array of unconsumed samples
2969 * @param consumed the number of samples of src which have been consumed are returned here
2970 * @param src_size the number of unconsumed samples available
2971 * @param dst_size the amount of space in samples available in dst
2972 * @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.
2973 * @return the number of samples written in dst or -1 if an error occurred
2974 */
2975 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2976
2977
2978 /**
2979 * Compensates samplerate/timestamp drift. The compensation is done by changing
2980 * the resampler parameters, so no audible clicks or similar distortions occur
2981 * @param compensation_distance distance in output samples over which the compensation should be performed
2982 * @param sample_delta number of output samples which should be output less
2983 *
2984 * example: av_resample_compensate(c, 10, 500)
2985 * here instead of 510 samples only 500 samples would be output
2986 *
2987 * note, due to rounding the actual compensation might be slightly different,
2988 * especially if the compensation_distance is large and the in_rate used during init is small
2989 */
2990 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2991 void av_resample_close(struct AVResampleContext *c);
2992
2993 /**
2994 * Allocate memory for a picture. Call avpicture_free to free it.
2995 *
2996 * @param picture the picture to be filled in
2997 * @param pix_fmt the format of the picture
2998 * @param width the width of the picture
2999 * @param height the height of the picture
3000 * @return zero if successful, a negative value if not
3001 */
3002 int avpicture_alloc(AVPicture *picture, enum PixelFormat pix_fmt, int width, int height);
3003
3004 /**
3005 * Free a picture previously allocated by avpicture_alloc().
3006 *
3007 * @param picture the AVPicture to be freed
3008 */
3009 void avpicture_free(AVPicture *picture);
3010
3011 /**
3012 * Fill in the AVPicture fields.
3013 * The fields of the given AVPicture are filled in by using the 'ptr' address
3014 * which points to the image data buffer. Depending on the specified picture
3015 * format, one or multiple image data pointers and line sizes will be set.
3016 * If a planar format is specified, several pointers will be set pointing to
3017 * the different picture planes and the line sizes of the different planes
3018 * will be stored in the lines_sizes array.
3019 * Call with ptr == NULL to get the required size for the ptr buffer.
3020 *
3021 * @param picture AVPicture whose fields are to be filled in
3022 * @param ptr Buffer which will contain or contains the actual image data
3023 * @param pix_fmt The format in which the picture data is stored.
3024 * @param width the width of the image in pixels
3025 * @param height the height of the image in pixels
3026 * @return size of the image data in bytes
3027 */
3028 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
3029 enum PixelFormat pix_fmt, int width, int height);
3030 int avpicture_layout(const AVPicture* src, enum PixelFormat pix_fmt, int width, int height,
3031 unsigned char *dest, int dest_size);
3032
3033 /**
3034 * Calculate the size in bytes that a picture of the given width and height
3035 * would occupy if stored in the given picture format.
3036 * Note that this returns the size of a compact representation as generated
3037 * by avpicture_layout, which can be smaller than the size required for e.g.
3038 * avpicture_fill.
3039 *
3040 * @param pix_fmt the given picture format
3041 * @param width the width of the image
3042 * @param height the height of the image
3043 * @return Image data size in bytes or -1 on error (e.g. too large dimensions).
3044 */
3045 int avpicture_get_size(enum PixelFormat pix_fmt, int width, int height);
3046 void avcodec_get_chroma_sub_sample(enum PixelFormat pix_fmt, int *h_shift, int *v_shift);
3047 const char *avcodec_get_pix_fmt_name(enum PixelFormat pix_fmt);
3048 void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
3049
3050 #if LIBAVCODEC_VERSION_MAJOR < 53
3051 /**
3052 * Returns the pixel format corresponding to the name name.
3053 *
3054 * If there is no pixel format with name name, then looks for a
3055 * pixel format with the name corresponding to the native endian
3056 * format of name.
3057 * For example in a little-endian system, first looks for "gray16",
3058 * then for "gray16le".
3059 *
3060 * Finally if no pixel format has been found, returns PIX_FMT_NONE.
3061 *
3062 * @deprecated Deprecated in favor of av_get_pix_fmt().
3063 */
3064 attribute_deprecated enum PixelFormat avcodec_get_pix_fmt(const char* name);
3065 #endif
3066
3067 /**
3068 * Returns a value representing the fourCC code associated to the
3069 * pixel format pix_fmt, or 0 if no associated fourCC code can be
3070 * found.
3071 */
3072 unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat pix_fmt);
3073
3074 #define FF_LOSS_RESOLUTION 0x0001 /**< loss due to resolution change */
3075 #define FF_LOSS_DEPTH 0x0002 /**< loss due to color depth change */
3076 #define FF_LOSS_COLORSPACE 0x0004 /**< loss due to color space conversion */
3077 #define FF_LOSS_ALPHA 0x0008 /**< loss of alpha bits */
3078 #define FF_LOSS_COLORQUANT 0x0010 /**< loss due to color quantization */
3079 #define FF_LOSS_CHROMA 0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
3080
3081 /**
3082 * Computes what kind of losses will occur when converting from one specific
3083 * pixel format to another.
3084 * When converting from one pixel format to another, information loss may occur.
3085 * For example, when converting from RGB24 to GRAY, the color information will
3086 * be lost. Similarly, other losses occur when converting from some formats to
3087 * other formats. These losses can involve loss of chroma, but also loss of
3088 * resolution, loss of color depth, loss due to the color space conversion, loss
3089 * of the alpha bits or loss due to color quantization.
3090 * avcodec_get_fix_fmt_loss() informs you about the various types of losses
3091 * which will occur when converting from one pixel format to another.
3092 *
3093 * @param[in] dst_pix_fmt destination pixel format
3094 * @param[in] src_pix_fmt source pixel format
3095 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
3096 * @return Combination of flags informing you what kind of losses will occur.
3097 */
3098 int avcodec_get_pix_fmt_loss(enum PixelFormat dst_pix_fmt, enum PixelFormat src_pix_fmt,
3099 int has_alpha);
3100
3101 /**
3102 * Finds the best pixel format to convert to given a certain source pixel
3103 * format. When converting from one pixel format to another, information loss
3104 * may occur. For example, when converting from RGB24 to GRAY, the color
3105 * information will be lost. Similarly, other losses occur when converting from
3106 * some formats to other formats. avcodec_find_best_pix_fmt() searches which of
3107 * the given pixel formats should be used to suffer the least amount of loss.
3108 * The pixel formats from which it chooses one, are determined by the
3109 * pix_fmt_mask parameter.
3110 *
3111 * @code
3112 * src_pix_fmt = PIX_FMT_YUV420P;
3113 * pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << PIX_FMT_RGB24);
3114 * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
3115 * @endcode
3116 *
3117 * @param[in] pix_fmt_mask bitmask determining which pixel format to choose from
3118 * @param[in] src_pix_fmt source pixel format
3119 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
3120 * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
3121 * @return The best pixel format to convert to or -1 if none was found.
3122 */
3123 enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt,
3124 int has_alpha, int *loss_ptr);
3125
3126
3127 /**
3128 * Print in buf the string corresponding to the pixel format with
3129 * number pix_fmt, or an header if pix_fmt is negative.
3130 *
3131 * @param[in] buf the buffer where to write the string
3132 * @param[in] buf_size the size of buf
3133 * @param[in] pix_fmt the number of the pixel format to print the corresponding info string, or
3134 * a negative value to print the corresponding header.
3135 * Meaningful values for obtaining a pixel format info vary from 0 to PIX_FMT_NB -1.
3136 */
3137 void avcodec_pix_fmt_string (char *buf, int buf_size, enum PixelFormat pix_fmt);
3138
3139 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
3140 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
3141
3142 /**
3143 * Tell if an image really has transparent alpha values.
3144 * @return ored mask of FF_ALPHA_xxx constants
3145 */
3146 int img_get_alpha_info(const AVPicture *src,
3147 enum PixelFormat pix_fmt, int width, int height);
3148
3149 /* deinterlace a picture */
3150 /* deinterlace - if not supported return -1 */
3151 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
3152 enum PixelFormat pix_fmt, int width, int height);
3153
3154 /* external high level API */
3155
3156 /**
3157 * If c is NULL, returns the first registered codec,
3158 * if c is non-NULL, returns the next registered codec after c,
3159 * or NULL if c is the last one.
3160 */
3161 AVCodec *av_codec_next(AVCodec *c);
3162
3163 /**
3164 * Returns the LIBAVCODEC_VERSION_INT constant.
3165 */
3166 unsigned avcodec_version(void);
3167
3168 /**
3169 * Returns the libavcodec build-time configuration.
3170 */
3171 const char *avcodec_configuration(void);
3172
3173 /**
3174 * Returns the libavcodec license.
3175 */
3176 const char *avcodec_license(void);
3177
3178 /**
3179 * Initializes libavcodec.
3180 *
3181 * @warning This function must be called before any other libavcodec
3182 * function.
3183 */
3184 void avcodec_init(void);
3185
3186 #if LIBAVCODEC_VERSION_MAJOR < 53
3187 /**
3188 * @deprecated Deprecated in favor of avcodec_register().
3189 */
3190 attribute_deprecated void register_avcodec(AVCodec *codec);
3191 #endif
3192
3193 /**
3194 * Register the codec codec and initialize libavcodec.
3195 *
3196 * @see avcodec_init()
3197 */
3198 void avcodec_register(AVCodec *codec);
3199
3200 /**
3201 * Finds a registered encoder with a matching codec ID.
3202 *
3203 * @param id CodecID of the requested encoder
3204 * @return An encoder if one was found, NULL otherwise.
3205 */
3206 AVCodec *avcodec_find_encoder(enum CodecID id);
3207
3208 /**
3209 * Finds a registered encoder with the specified name.
3210 *
3211 * @param name name of the requested encoder
3212 * @return An encoder if one was found, NULL otherwise.
3213 */
3214 AVCodec *avcodec_find_encoder_by_name(const char *name);
3215
3216 /**
3217 * Finds a registered decoder with a matching codec ID.
3218 *
3219 * @param id CodecID of the requested decoder
3220 * @return A decoder if one was found, NULL otherwise.
3221 */
3222 AVCodec *avcodec_find_decoder(enum CodecID id);
3223
3224 /**
3225 * Finds a registered decoder with the specified name.
3226 *
3227 * @param name name of the requested decoder
3228 * @return A decoder if one was found, NULL otherwise.
3229 */
3230 AVCodec *avcodec_find_decoder_by_name(const char *name);
3231 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
3232
3233 /**
3234 * Sets the fields of the given AVCodecContext to default values.
3235 *
3236 * @param s The AVCodecContext of which the fields should be set to default values.
3237 */
3238 void avcodec_get_context_defaults(AVCodecContext *s);
3239
3240 /** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3241 * we WILL change its arguments and name a few times! */
3242 void avcodec_get_context_defaults2(AVCodecContext *s, enum CodecType);
3243
3244 /**
3245 * Allocates an AVCodecContext and sets its fields to default values. The
3246 * resulting struct can be deallocated by simply calling av_free().
3247 *
3248 * @return An AVCodecContext filled with default values or NULL on failure.
3249 * @see avcodec_get_context_defaults
3250 */
3251 AVCodecContext *avcodec_alloc_context(void);
3252
3253 /** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3254 * we WILL change its arguments and name a few times! */
3255 AVCodecContext *avcodec_alloc_context2(enum CodecType);
3256
3257 /**
3258 * Sets the fields of the given AVFrame to default values.
3259 *
3260 * @param pic The AVFrame of which the fields should be set to default values.
3261 */
3262 void avcodec_get_frame_defaults(AVFrame *pic);
3263
3264 /**
3265 * Allocates an AVFrame and sets its fields to default values. The resulting
3266 * struct can be deallocated by simply calling av_free().
3267 *
3268 * @return An AVFrame filled with default values or NULL on failure.
3269 * @see avcodec_get_frame_defaults
3270 */
3271 AVFrame *avcodec_alloc_frame(void);
3272
3273 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
3274 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
3275 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
3276 /**
3277 * Modifies width and height values so that they will result in a memory
3278 * buffer that is acceptable for the codec if you do not use any horizontal
3279 * padding.
3280 */
3281 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
3282 /**
3283 * Modifies width and height values so that they will result in a memory
3284 * buffer that is acceptable for the codec if you also ensure that all
3285 * line sizes are a multiple of the respective linesize_align[i].
3286 */
3287 void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
3288 int linesize_align[4]);
3289
3290 /**
3291 * Checks if the given dimension of a picture is valid, meaning that all
3292 * bytes of the picture can be addressed with a signed int.
3293 *
3294 * @param[in] w Width of the picture.
3295 * @param[in] h Height of the picture.
3296 * @return Zero if valid, a negative value if invalid.
3297 */
3298 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
3299 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
3300
3301 int avcodec_thread_init(AVCodecContext *s, int thread_count);
3302 void avcodec_thread_free(AVCodecContext *s);
3303 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size);
3304 int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int, int),void *arg, int *ret, int count);
3305 //FIXME func typedef
3306
3307 /**
3308 * Initializes the AVCodecContext to use the given AVCodec. Prior to using this
3309 * function the context has to be allocated.
3310 *
3311 * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
3312 * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
3313 * retrieving a codec.
3314 *
3315 * @warning This function is not thread safe!
3316 *
3317 * @code
3318 * avcodec_register_all();
3319 * codec = avcodec_find_decoder(CODEC_ID_H264);
3320 * if (!codec)
3321 * exit(1);
3322 *
3323 * context = avcodec_alloc_context();
3324 *
3325 * if (avcodec_open(context, codec) < 0)
3326 * exit(1);
3327 * @endcode
3328 *
3329 * @param avctx The context which will be set up to use the given codec.
3330 * @param codec The codec to use within the context.
3331 * @return zero on success, a negative value on error
3332 * @see avcodec_alloc_context, avcodec_find_decoder, avcodec_find_encoder
3333 */
3334 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
3335
3336 #if LIBAVCODEC_VERSION_MAJOR < 53
3337 /**
3338 * Decodes an audio frame from buf into samples.
3339 * Wrapper function which calls avcodec_decode_audio3.
3340 *
3341 * @deprecated Use avcodec_decode_audio3 instead.
3342 * @param avctx the codec context
3343 * @param[out] samples the output buffer
3344 * @param[in,out] frame_size_ptr the output buffer size in bytes
3345 * @param[in] buf the input buffer
3346 * @param[in] buf_size the input buffer size in bytes
3347 * @return On error a negative value is returned, otherwise the number of bytes
3348 * used or zero if no frame could be decompressed.
3349 */
3350 attribute_deprecated int avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
3351 int *frame_size_ptr,
3352 const uint8_t *buf, int buf_size);
3353 #endif
3354
3355 /**
3356 * Decodes the audio frame of size avpkt->size from avpkt->data into samples.
3357 * Some decoders may support multiple frames in a single AVPacket, such
3358 * decoders would then just decode the first frame. In this case,
3359 * avcodec_decode_audio3 has to be called again with an AVPacket that contains
3360 * the remaining data in order to decode the second frame etc.
3361 * If no frame
3362 * could be outputted, frame_size_ptr is zero. Otherwise, it is the
3363 * decompressed frame size in bytes.
3364 *
3365 * @warning You must set frame_size_ptr to the allocated size of the
3366 * output buffer before calling avcodec_decode_audio3().
3367 *
3368 * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
3369 * the actual read bytes because some optimized bitstream readers read 32 or 64
3370 * bits at once and could read over the end.
3371 *
3372 * @warning The end of the input buffer avpkt->data should be set to 0 to ensure that
3373 * no overreading happens for damaged MPEG streams.
3374 *
3375 * @note You might have to align the input buffer avpkt->data and output buffer
3376 * samples. The alignment requirements depend on the CPU: On some CPUs it isn't
3377 * necessary at all, on others it won't work at all if not aligned and on others
3378 * it will work but it will have an impact on performance.
3379 *
3380 * In practice, avpkt->data should have 4 byte alignment at minimum and
3381 * samples should be 16 byte aligned unless the CPU doesn't need it
3382 * (AltiVec and SSE do).
3383 *
3384 * @param avctx the codec context
3385 * @param[out] samples the output buffer, sample type in avctx->sample_fmt
3386 * @param[in,out] frame_size_ptr the output buffer size in bytes
3387 * @param[in] avpkt The input AVPacket containing the input buffer.
3388 * You can create such packet with av_init_packet() and by then setting
3389 * data and size, some decoders might in addition need other fields.
3390 * All decoders are designed to use the least fields possible though.
3391 * @return On error a negative value is returned, otherwise the number of bytes
3392 * used or zero if no frame data was decompressed (used) from the input AVPacket.
3393 */
3394 int avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
3395 int *frame_size_ptr,
3396 AVPacket *avpkt);
3397
3398 #if LIBAVCODEC_VERSION_MAJOR < 53
3399 /**
3400 * Decodes a video frame from buf into picture.
3401 * Wrapper function which calls avcodec_decode_video2.
3402 *
3403 * @deprecated Use avcodec_decode_video2 instead.
3404 * @param avctx the codec context
3405 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
3406 * @param[in] buf the input buffer
3407 * @param[in] buf_size the size of the input buffer in bytes
3408 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
3409 * @return On error a negative value is returned, otherwise the number of bytes
3410 * used or zero if no frame could be decompressed.
3411 */
3412 attribute_deprecated int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
3413 int *got_picture_ptr,
3414 const uint8_t *buf, int buf_size);
3415 #endif
3416
3417 /**
3418 * Decodes the video frame of size avpkt->size from avpkt->data into picture.
3419 * Some decoders may support multiple frames in a single AVPacket, such
3420 * decoders would then just decode the first frame.
3421 *
3422 * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
3423 * the actual read bytes because some optimized bitstream readers read 32 or 64
3424 * bits at once and could read over the end.
3425 *
3426 * @warning The end of the input buffer buf should be set to 0 to ensure that
3427 * no overreading happens for damaged MPEG streams.
3428 *
3429 * @note You might have to align the input buffer avpkt->data.
3430 * The alignment requirements depend on the CPU: on some CPUs it isn't
3431 * necessary at all, on others it won't work at all if not aligned and on others
3432 * it will work but it will have an impact on performance.
3433 *
3434 * In practice, avpkt->data should have 4 byte alignment at minimum.
3435 *
3436 * @note Some codecs have a delay between input and output, these need to be
3437 * fed with avpkt->data=NULL, avpkt->size=0 at the end to return the remaining frames.
3438 *
3439 * @param avctx the codec context
3440 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
3441 * @param[in] avpkt The input AVpacket containing the input buffer.
3442 * You can create such packet with av_init_packet() and by then setting
3443 * data and size, some decoders might in addition need other fields like
3444 * flags&PKT_FLAG_KEY. All decoders are designed to use the least
3445 * fields possible.
3446 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
3447 * @return On error a negative value is returned, otherwise the number of bytes
3448 * used or zero if no frame could be decompressed.
3449 */
3450 int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
3451 int *got_picture_ptr,
3452 AVPacket *avpkt);
3453
3454 #if LIBAVCODEC_VERSION_MAJOR < 53
3455 /* Decode a subtitle message. Return -1 if error, otherwise return the
3456 * number of bytes used. If no subtitle could be decompressed,
3457 * got_sub_ptr is zero. Otherwise, the subtitle is stored in *sub. */
3458 attribute_deprecated int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
3459 int *got_sub_ptr,
3460 const uint8_t *buf, int buf_size);
3461 #endif
3462
3463 /**
3464 * Decodes a subtitle message.
3465 * Returns a negative value on error, otherwise returns the number of bytes used.
3466 * If no subtitle could be decompressed, got_sub_ptr is zero.
3467 * Otherwise, the subtitle is stored in *sub.
3468 *
3469 * @param avctx the codec context
3470 * @param[out] sub The AVSubtitle in which the decoded subtitle will be stored.
3471 * @param[in,out] got_sub_ptr Zero if no subtitle could be decompressed, otherwise, it is nonzero.
3472 * @param[in] avpkt The input AVPacket containing the input buffer.
3473 */
3474 int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
3475 int *got_sub_ptr,
3476 AVPacket *avpkt);
3477 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
3478 int *data_size_ptr,
3479 uint8_t *buf, int buf_size);
3480
3481 /**
3482 * Encodes an audio frame from samples into buf.
3483 *
3484 * @note The output buffer should be at least FF_MIN_BUFFER_SIZE bytes large.
3485 * However, for PCM audio the user will know how much space is needed
3486 * because it depends on the value passed in buf_size as described
3487 * below. In that case a lower value can be used.
3488 *
3489 * @param avctx the codec context
3490 * @param[out] buf the output buffer
3491 * @param[in] buf_size the output buffer size
3492 * @param[in] samples the input buffer containing the samples
3493 * The number of samples read from this buffer is frame_size*channels,
3494 * both of which are defined in avctx.
3495 * For PCM audio the number of samples read from samples is equal to
3496 * buf_size * input_sample_size / output_sample_size.
3497 * @return On error a negative value is returned, on success zero or the number
3498 * of bytes used to encode the data read from the input buffer.
3499 */
3500 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3501 const short *samples);
3502
3503 /**
3504 * Encodes a video frame from pict into buf.
3505 * The input picture should be
3506 * stored using a specific format, namely avctx.pix_fmt.
3507 *
3508 * @param avctx the codec context
3509 * @param[out] buf the output buffer for the bitstream of encoded frame
3510 * @param[in] buf_size the size of the output buffer in bytes
3511 * @param[in] pict the input picture to encode
3512 * @return On error a negative value is returned, on success zero or the number
3513 * of bytes used from the output buffer.
3514 */
3515 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3516 const AVFrame *pict);
3517 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3518 const AVSubtitle *sub);
3519
3520 int avcodec_close(AVCodecContext *avctx);
3521
3522 /**
3523 * Register all the codecs, parsers and bitstream filters which were enabled at
3524 * configuration time. If you do not call this function you can select exactly
3525 * which formats you want to support, by using the individual registration
3526 * functions.
3527 *
3528 * @see avcodec_register
3529 * @see av_register_codec_parser
3530 * @see av_register_bitstream_filter
3531 */
3532 void avcodec_register_all(void);
3533
3534 /**
3535 * Flush buffers, should be called when seeking or when switching to a different stream.
3536 */
3537 void avcodec_flush_buffers(AVCodecContext *avctx);
3538
3539 void avcodec_default_free_buffers(AVCodecContext *s);
3540
3541 /* misc useful functions */
3542
3543 /**
3544 * Returns a single letter to describe the given picture type pict_type.
3545 *
3546 * @param[in] pict_type the picture type
3547 * @return A single character representing the picture type.
3548 */
3549 char av_get_pict_type_char(int pict_type);
3550
3551 /**
3552 * Returns codec bits per sample.
3553 *
3554 * @param[in] codec_id the codec
3555 * @return Number of bits per sample or zero if unknown for the given codec.
3556 */
3557 int av_get_bits_per_sample(enum CodecID codec_id);
3558
3559 /**
3560 * Returns sample format bits per sample.
3561 *
3562 * @param[in] sample_fmt the sample format
3563 * @return Number of bits per sample or zero if unknown for the given sample format.
3564 */
3565 int av_get_bits_per_sample_format(enum SampleFormat sample_fmt);
3566
3567 /* frame parsing */
3568 typedef struct AVCodecParserContext {
3569 void *priv_data;
3570 struct AVCodecParser *parser;
3571 int64_t frame_offset; /* offset of the current frame */
3572 int64_t cur_offset; /* current offset
3573 (incremented by each av_parser_parse()) */
3574 int64_t next_frame_offset; /* offset of the next frame */
3575 /* video info */
3576 int pict_type; /* XXX: Put it back in AVCodecContext. */
3577 /**
3578 * This field is used for proper frame duration computation in lavf.
3579 * It signals, how much longer the frame duration of the current frame
3580 * is compared to normal frame duration.
3581 *
3582 * frame_duration = (1 + repeat_pict) * time_base
3583 *
3584 * It is used by codecs like H.264 to display telecined material.
3585 */
3586 int repeat_pict; /* XXX: Put it back in AVCodecContext. */
3587 int64_t pts; /* pts of the current frame */
3588 int64_t dts; /* dts of the current frame */
3589
3590 /* private data */
3591 int64_t last_pts;
3592 int64_t last_dts;
3593 int fetch_timestamp;
3594
3595 #define AV_PARSER_PTS_NB 4
3596 int cur_frame_start_index;
3597 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
3598 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
3599 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
3600
3601 int flags;
3602 #define PARSER_FLAG_COMPLETE_FRAMES 0x0001
3603
3604 int64_t offset; ///< byte offset from starting packet start
3605 int64_t cur_frame_end[AV_PARSER_PTS_NB];
3606
3607 /*!
3608 * Set by parser to 1 for key frames and 0 for non-key frames.
3609 * It is initialized to -1, so if the parser doesn't set this flag,
3610 * old-style fallback using FF_I_TYPE picture type as key frames
3611 * will be used.
3612 */
3613 int key_frame;
3614
3615 /**
3616 * Time difference in stream time base units from the pts of this
3617 * packet to the point at which the output from the decoder has converged
3618 * independent from the availability of previous frames. That is, the
3619 * frames are virtually identical no matter if decoding started from
3620 * the very first frame or from this keyframe.
3621 * Is AV_NOPTS_VALUE if unknown.
3622 * This field is not the display duration of the current frame.
3623 *
3624 * The purpose of this field is to allow seeking in streams that have no
3625 * keyframes in the conventional sense. It corresponds to the
3626 * recovery point SEI in H.264 and match_time_delta in NUT. It is also
3627 * essential for some types of subtitle streams to ensure that all
3628 * subtitles are correctly displayed after seeking.
3629 */
3630 int64_t convergence_duration;
3631
3632 // Timestamp generation support:
3633 /**
3634 * Synchronization point for start of timestamp generation.
3635 *
3636 * Set to >0 for sync point, 0 for no sync point and <0 for undefined
3637 * (default).
3638 *
3639 * For example, this corresponds to presence of H.264 buffering period
3640 * SEI message.
3641 */
3642 int dts_sync_point;
3643
3644 /**
3645 * Offset of the current timestamp against last timestamp sync point in
3646 * units of AVCodecContext.time_base.
3647 *
3648 * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
3649 * contain a valid timestamp offset.
3650 *
3651 * Note that the timestamp of sync point has usually a nonzero
3652 * dts_ref_dts_delta, which refers to the previous sync point. Offset of
3653 * the next frame after timestamp sync point will be usually 1.
3654 *
3655 * For example, this corresponds to H.264 cpb_removal_delay.
3656 */
3657 int dts_ref_dts_delta;
3658
3659 /**
3660 * Presentation delay of current frame in units of AVCodecContext.time_base.
3661 *
3662 * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
3663 * contain valid non-negative timestamp delta (presentation time of a frame
3664 * must not lie in the past).
3665 *
3666 * This delay represents the difference between decoding and presentation
3667 * time of the frame.
3668 *
3669 * For example, this corresponds to H.264 dpb_output_delay.
3670 */
3671 int pts_dts_delta;
3672
3673 /**
3674 * Position of the packet in file.
3675 *
3676 * Analogous to cur_frame_pts/dts
3677 */
3678 int64_t cur_frame_pos[AV_PARSER_PTS_NB];
3679
3680 /**
3681 * Byte position of currently parsed frame in stream.
3682 */
3683 int64_t pos;
3684
3685 /**
3686 * Previous frame byte position.
3687 */
3688 int64_t last_pos;
3689 } AVCodecParserContext;
3690
3691 typedef struct AVCodecParser {
3692 int codec_ids[5]; /* several codec IDs are permitted */
3693 int priv_data_size;
3694 int (*parser_init)(AVCodecParserContext *s);
3695 int (*parser_parse)(AVCodecParserContext *s,
3696 AVCodecContext *avctx,
3697 const uint8_t **poutbuf, int *poutbuf_size,
3698 const uint8_t *buf, int buf_size);
3699 void (*parser_close)(AVCodecParserContext *s);
3700 int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
3701 struct AVCodecParser *next;
3702 } AVCodecParser;
3703
3704 AVCodecParser *av_parser_next(AVCodecParser *c);
3705
3706 void av_register_codec_parser(AVCodecParser *parser);
3707 AVCodecParserContext *av_parser_init(int codec_id);
3708
3709 #if LIBAVCODEC_VERSION_MAJOR < 53
3710 attribute_deprecated
3711 int av_parser_parse(AVCodecParserContext *s,
3712 AVCodecContext *avctx,
3713 uint8_t **poutbuf, int *poutbuf_size,
3714 const uint8_t *buf, int buf_size,
3715 int64_t pts, int64_t dts);
3716 #endif
3717
3718 /**
3719 * Parse a packet.
3720 *
3721 * @param s parser context.
3722 * @param avctx codec context.
3723 * @param poutbuf set to pointer to parsed buffer or NULL if not yet finished.
3724 * @param poutbuf_size set to size of parsed buffer or zero if not yet finished.
3725 * @param buf input buffer.
3726 * @param buf_size input length, to signal EOF, this should be 0 (so that the last frame can be output).
3727 * @param pts input presentation timestamp.
3728 * @param dts input decoding timestamp.
3729 * @param pos input byte position in stream.
3730 * @return the number of bytes of the input bitstream used.
3731 *
3732 * Example:
3733 * @code
3734 * while(in_len){
3735 * len = av_parser_parse2(myparser, AVCodecContext, &data, &size,
3736 * in_data, in_len,
3737 * pts, dts, pos);
3738 * in_data += len;
3739 * in_len -= len;
3740 *
3741 * if(size)
3742 * decode_frame(data, size);
3743 * }
3744 * @endcode
3745 */
3746 int av_parser_parse2(AVCodecParserContext *s,
3747 AVCodecContext *avctx,
3748 uint8_t **poutbuf, int *poutbuf_size,
3749 const uint8_t *buf, int buf_size,
3750 int64_t pts, int64_t dts,
3751 int64_t pos);
3752
3753 int av_parser_change(AVCodecParserContext *s,
3754 AVCodecContext *avctx,
3755 uint8_t **poutbuf, int *poutbuf_size,
3756 const uint8_t *buf, int buf_size, int keyframe);
3757 void av_parser_close(AVCodecParserContext *s);
3758
3759
3760 typedef struct AVBitStreamFilterContext {
3761 void *priv_data;
3762 struct AVBitStreamFilter *filter;
3763 AVCodecParserContext *parser;
3764 struct AVBitStreamFilterContext *next;
3765 } AVBitStreamFilterContext;
3766
3767
3768 typedef struct AVBitStreamFilter {
3769 const char *name;
3770 int priv_data_size;
3771 int (*filter)(AVBitStreamFilterContext *bsfc,
3772 AVCodecContext *avctx, const char *args,
3773 uint8_t **poutbuf, int *poutbuf_size,
3774 const uint8_t *buf, int buf_size, int keyframe);
3775 void (*close)(AVBitStreamFilterContext *bsfc);
3776 struct AVBitStreamFilter *next;
3777 } AVBitStreamFilter;
3778
3779 void av_register_bitstream_filter(AVBitStreamFilter *bsf);
3780 AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
3781 int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
3782 AVCodecContext *avctx, const char *args,
3783 uint8_t **poutbuf, int *poutbuf_size