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1/*
2 * copyright (c) 2001 Fabrice Bellard
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21#ifndef AVCODEC_AVCODEC_H
22#define AVCODEC_AVCODEC_H
23
24/**
25 * @file
26 * external API header
27 */
28
29#include <errno.h>
30#include "libavutil/avutil.h"
31
32#define LIBAVCODEC_VERSION_MAJOR 52
33#define LIBAVCODEC_VERSION_MINOR 84
34#define LIBAVCODEC_VERSION_MICRO 3
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 * Identify 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 */
62enum CodecID {
63 CODEC_ID_NONE,
64
65 /* video codecs */
66 CODEC_ID_MPEG1VIDEO,
67 CODEC_ID_MPEG2VIDEO, ///< preferred ID for MPEG-1/2 video decoding
68 CODEC_ID_MPEG2VIDEO_XVMC,
69 CODEC_ID_H261,
70 CODEC_ID_H263,
71 CODEC_ID_RV10,
72 CODEC_ID_RV20,
73 CODEC_ID_MJPEG,
74 CODEC_ID_MJPEGB,
75 CODEC_ID_LJPEG,
76 CODEC_ID_SP5X,
77 CODEC_ID_JPEGLS,
78 CODEC_ID_MPEG4,
79 CODEC_ID_RAWVIDEO,
80 CODEC_ID_MSMPEG4V1,
81 CODEC_ID_MSMPEG4V2,
82 CODEC_ID_MSMPEG4V3,
83 CODEC_ID_WMV1,
84 CODEC_ID_WMV2,
85 CODEC_ID_H263P,
86 CODEC_ID_H263I,
87 CODEC_ID_FLV1,
88 CODEC_ID_SVQ1,
89 CODEC_ID_SVQ3,
90 CODEC_ID_DVVIDEO,
91 CODEC_ID_HUFFYUV,
92 CODEC_ID_CYUV,
93 CODEC_ID_H264,
94 CODEC_ID_INDEO3,
95 CODEC_ID_VP3,
96 CODEC_ID_THEORA,
97 CODEC_ID_ASV1,
98 CODEC_ID_ASV2,
99 CODEC_ID_FFV1,
100 CODEC_ID_4XM,
101 CODEC_ID_VCR1,
102 CODEC_ID_CLJR,
103 CODEC_ID_MDEC,
104 CODEC_ID_ROQ,
105 CODEC_ID_INTERPLAY_VIDEO,
106 CODEC_ID_XAN_WC3,
107 CODEC_ID_XAN_WC4,
108 CODEC_ID_RPZA,
109 CODEC_ID_CINEPAK,
110 CODEC_ID_WS_VQA,
111 CODEC_ID_MSRLE,
112 CODEC_ID_MSVIDEO1,
113 CODEC_ID_IDCIN,
114 CODEC_ID_8BPS,
115 CODEC_ID_SMC,
116 CODEC_ID_FLIC,
117 CODEC_ID_TRUEMOTION1,
118 CODEC_ID_VMDVIDEO,
119 CODEC_ID_MSZH,
120 CODEC_ID_ZLIB,
121 CODEC_ID_QTRLE,
122 CODEC_ID_SNOW,
123 CODEC_ID_TSCC,
124 CODEC_ID_ULTI,
125 CODEC_ID_QDRAW,
126 CODEC_ID_VIXL,
127 CODEC_ID_QPEG,
128#if LIBAVCODEC_VERSION_MAJOR < 53
129 CODEC_ID_XVID,
130#endif
131 CODEC_ID_PNG,
132 CODEC_ID_PPM,
133 CODEC_ID_PBM,
134 CODEC_ID_PGM,
135 CODEC_ID_PGMYUV,
136 CODEC_ID_PAM,
137 CODEC_ID_FFVHUFF,
138 CODEC_ID_RV30,
139 CODEC_ID_RV40,
140 CODEC_ID_VC1,
141 CODEC_ID_WMV3,
142 CODEC_ID_LOCO,
143 CODEC_ID_WNV1,
144 CODEC_ID_AASC,
145 CODEC_ID_INDEO2,
146 CODEC_ID_FRAPS,
147 CODEC_ID_TRUEMOTION2,
148 CODEC_ID_BMP,
149 CODEC_ID_CSCD,
150 CODEC_ID_MMVIDEO,
151 CODEC_ID_ZMBV,
152 CODEC_ID_AVS,
153 CODEC_ID_SMACKVIDEO,
154 CODEC_ID_NUV,
155 CODEC_ID_KMVC,
156 CODEC_ID_FLASHSV,
157 CODEC_ID_CAVS,
158 CODEC_ID_JPEG2000,
159 CODEC_ID_VMNC,
160 CODEC_ID_VP5,
161 CODEC_ID_VP6,
162 CODEC_ID_VP6F,
163 CODEC_ID_TARGA,
164 CODEC_ID_DSICINVIDEO,
165 CODEC_ID_TIERTEXSEQVIDEO,
166 CODEC_ID_TIFF,
167 CODEC_ID_GIF,
168 CODEC_ID_FFH264,
169 CODEC_ID_DXA,
170 CODEC_ID_DNXHD,
171 CODEC_ID_THP,
172 CODEC_ID_SGI,
173 CODEC_ID_C93,
174 CODEC_ID_BETHSOFTVID,
175 CODEC_ID_PTX,
176 CODEC_ID_TXD,
177 CODEC_ID_VP6A,
178 CODEC_ID_AMV,
179 CODEC_ID_VB,
180 CODEC_ID_PCX,
181 CODEC_ID_SUNRAST,
182 CODEC_ID_INDEO4,
183 CODEC_ID_INDEO5,
184 CODEC_ID_MIMIC,
185 CODEC_ID_RL2,
186 CODEC_ID_8SVX_EXP,
187 CODEC_ID_8SVX_FIB,
188 CODEC_ID_ESCAPE124,
189 CODEC_ID_DIRAC,
190 CODEC_ID_BFI,
191 CODEC_ID_CMV,
192 CODEC_ID_MOTIONPIXELS,
193 CODEC_ID_TGV,
194 CODEC_ID_TGQ,
195 CODEC_ID_TQI,
196 CODEC_ID_AURA,
197 CODEC_ID_AURA2,
198 CODEC_ID_V210X,
199 CODEC_ID_TMV,
200 CODEC_ID_V210,
201 CODEC_ID_DPX,
202 CODEC_ID_MAD,
203 CODEC_ID_FRWU,
204 CODEC_ID_FLASHSV2,
205 CODEC_ID_CDGRAPHICS,
206 CODEC_ID_R210,
207 CODEC_ID_ANM,
208 CODEC_ID_BINKVIDEO,
209 CODEC_ID_IFF_ILBM,
210 CODEC_ID_IFF_BYTERUN1,
211 CODEC_ID_KGV1,
212 CODEC_ID_YOP,
213 CODEC_ID_VP8,
214 CODEC_ID_PICTOR,
215 CODEC_ID_ANSI,
216
217 /* various PCM "codecs" */
218 CODEC_ID_PCM_S16LE= 0x10000,
219 CODEC_ID_PCM_S16BE,
220 CODEC_ID_PCM_U16LE,
221 CODEC_ID_PCM_U16BE,
222 CODEC_ID_PCM_S8,
223 CODEC_ID_PCM_U8,
224 CODEC_ID_PCM_MULAW,
225 CODEC_ID_PCM_ALAW,
226 CODEC_ID_PCM_S32LE,
227 CODEC_ID_PCM_S32BE,
228 CODEC_ID_PCM_U32LE,
229 CODEC_ID_PCM_U32BE,
230 CODEC_ID_PCM_S24LE,
231 CODEC_ID_PCM_S24BE,
232 CODEC_ID_PCM_U24LE,
233 CODEC_ID_PCM_U24BE,
234 CODEC_ID_PCM_S24DAUD,
235 CODEC_ID_PCM_ZORK,
236 CODEC_ID_PCM_S16LE_PLANAR,
237 CODEC_ID_PCM_DVD,
238 CODEC_ID_PCM_F32BE,
239 CODEC_ID_PCM_F32LE,
240 CODEC_ID_PCM_F64BE,
241 CODEC_ID_PCM_F64LE,
242 CODEC_ID_PCM_BLURAY,
243
244 /* various ADPCM codecs */
245 CODEC_ID_ADPCM_IMA_QT= 0x11000,
246 CODEC_ID_ADPCM_IMA_WAV,
247 CODEC_ID_ADPCM_IMA_DK3,
248 CODEC_ID_ADPCM_IMA_DK4,
249 CODEC_ID_ADPCM_IMA_WS,
250 CODEC_ID_ADPCM_IMA_SMJPEG,
251 CODEC_ID_ADPCM_MS,
252 CODEC_ID_ADPCM_4XM,
253 CODEC_ID_ADPCM_XA,
254 CODEC_ID_ADPCM_ADX,
255 CODEC_ID_ADPCM_EA,
256 CODEC_ID_ADPCM_G726,
257 CODEC_ID_ADPCM_CT,
258 CODEC_ID_ADPCM_SWF,
259 CODEC_ID_ADPCM_YAMAHA,
260 CODEC_ID_ADPCM_SBPRO_4,
261 CODEC_ID_ADPCM_SBPRO_3,
262 CODEC_ID_ADPCM_SBPRO_2,
263 CODEC_ID_ADPCM_THP,
264 CODEC_ID_ADPCM_IMA_AMV,
265 CODEC_ID_ADPCM_EA_R1,
266 CODEC_ID_ADPCM_EA_R3,
267 CODEC_ID_ADPCM_EA_R2,
268 CODEC_ID_ADPCM_IMA_EA_SEAD,
269 CODEC_ID_ADPCM_IMA_EA_EACS,
270 CODEC_ID_ADPCM_EA_XAS,
271 CODEC_ID_ADPCM_EA_MAXIS_XA,
272 CODEC_ID_ADPCM_IMA_ISS,
273
274 /* AMR */
275 CODEC_ID_AMR_NB= 0x12000,
276 CODEC_ID_AMR_WB,
277
278 /* RealAudio codecs*/
279 CODEC_ID_RA_144= 0x13000,
280 CODEC_ID_RA_288,
281
282 /* various DPCM codecs */
283 CODEC_ID_ROQ_DPCM= 0x14000,
284 CODEC_ID_INTERPLAY_DPCM,
285 CODEC_ID_XAN_DPCM,
286 CODEC_ID_SOL_DPCM,
287
288 /* audio codecs */
289 CODEC_ID_MP2= 0x15000,
290 CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3
291 CODEC_ID_AAC,
292 CODEC_ID_AC3,
293 CODEC_ID_DTS,
294 CODEC_ID_VORBIS,
295 CODEC_ID_DVAUDIO,
296 CODEC_ID_WMAV1,
297 CODEC_ID_WMAV2,
298 CODEC_ID_MACE3,
299 CODEC_ID_MACE6,
300 CODEC_ID_VMDAUDIO,
301 CODEC_ID_SONIC,
302 CODEC_ID_SONIC_LS,
303 CODEC_ID_FLAC,
304 CODEC_ID_MP3ADU,
305 CODEC_ID_MP3ON4,
306 CODEC_ID_SHORTEN,
307 CODEC_ID_ALAC,
308 CODEC_ID_WESTWOOD_SND1,
309 CODEC_ID_GSM, ///< as in Berlin toast format
310 CODEC_ID_QDM2,
311 CODEC_ID_COOK,
312 CODEC_ID_TRUESPEECH,
313 CODEC_ID_TTA,
314 CODEC_ID_SMACKAUDIO,
315 CODEC_ID_QCELP,
316 CODEC_ID_WAVPACK,
317 CODEC_ID_DSICINAUDIO,
318 CODEC_ID_IMC,
319 CODEC_ID_MUSEPACK7,
320 CODEC_ID_MLP,
321 CODEC_ID_GSM_MS, /* as found in WAV */
322 CODEC_ID_ATRAC3,
323 CODEC_ID_VOXWARE,
324 CODEC_ID_APE,
325 CODEC_ID_NELLYMOSER,
326 CODEC_ID_MUSEPACK8,
327 CODEC_ID_SPEEX,
328 CODEC_ID_WMAVOICE,
329 CODEC_ID_WMAPRO,
330 CODEC_ID_WMALOSSLESS,
331 CODEC_ID_ATRAC3P,
332 CODEC_ID_EAC3,
333 CODEC_ID_SIPR,
334 CODEC_ID_MP1,
335 CODEC_ID_TWINVQ,
336 CODEC_ID_TRUEHD,
337 CODEC_ID_MP4ALS,
338 CODEC_ID_ATRAC1,
339 CODEC_ID_BINKAUDIO_RDFT,
340 CODEC_ID_BINKAUDIO_DCT,
341
342 /* subtitle codecs */
343 CODEC_ID_DVD_SUBTITLE= 0x17000,
344 CODEC_ID_DVB_SUBTITLE,
345 CODEC_ID_TEXT, ///< raw UTF-8 text
346 CODEC_ID_XSUB,
347 CODEC_ID_SSA,
348 CODEC_ID_MOV_TEXT,
349 CODEC_ID_HDMV_PGS_SUBTITLE,
350 CODEC_ID_DVB_TELETEXT,
351 CODEC_ID_SRT,
352
353 /* other specific kind of codecs (generally used for attachments) */
354 CODEC_ID_TTF= 0x18000,
355
356 CODEC_ID_PROBE= 0x19000, ///< codec_id is not known (like CODEC_ID_NONE) but lavf should attempt to identify it
357
358 CODEC_ID_MPEG2TS= 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS
359 * stream (only used by libavformat) */
360};
361
362#if LIBAVCODEC_VERSION_MAJOR < 53
363#define CodecType AVMediaType
364
365#define CODEC_TYPE_UNKNOWN AVMEDIA_TYPE_UNKNOWN
366#define CODEC_TYPE_VIDEO AVMEDIA_TYPE_VIDEO
367#define CODEC_TYPE_AUDIO AVMEDIA_TYPE_AUDIO
368#define CODEC_TYPE_DATA AVMEDIA_TYPE_DATA
369#define CODEC_TYPE_SUBTITLE AVMEDIA_TYPE_SUBTITLE
370#define CODEC_TYPE_ATTACHMENT AVMEDIA_TYPE_ATTACHMENT
371#define CODEC_TYPE_NB AVMEDIA_TYPE_NB
372#endif
373
374/**
375 * all in native-endian format
376 */
377enum SampleFormat {
378 SAMPLE_FMT_NONE = -1,
379 SAMPLE_FMT_U8, ///< unsigned 8 bits
380 SAMPLE_FMT_S16, ///< signed 16 bits
381 SAMPLE_FMT_S32, ///< signed 32 bits
382 SAMPLE_FMT_FLT, ///< float
383 SAMPLE_FMT_DBL, ///< double
384 SAMPLE_FMT_NB ///< Number of sample formats. DO NOT USE if dynamically linking to libavcodec
385};
386
387/* Audio channel masks */
388#define CH_FRONT_LEFT 0x00000001
389#define CH_FRONT_RIGHT 0x00000002
390#define CH_FRONT_CENTER 0x00000004
391#define CH_LOW_FREQUENCY 0x00000008
392#define CH_BACK_LEFT 0x00000010
393#define CH_BACK_RIGHT 0x00000020
394#define CH_FRONT_LEFT_OF_CENTER 0x00000040
395#define CH_FRONT_RIGHT_OF_CENTER 0x00000080
396#define CH_BACK_CENTER 0x00000100
397#define CH_SIDE_LEFT 0x00000200
398#define CH_SIDE_RIGHT 0x00000400
399#define CH_TOP_CENTER 0x00000800
400#define CH_TOP_FRONT_LEFT 0x00001000
401#define CH_TOP_FRONT_CENTER 0x00002000
402#define CH_TOP_FRONT_RIGHT 0x00004000
403#define CH_TOP_BACK_LEFT 0x00008000
404#define CH_TOP_BACK_CENTER 0x00010000
405#define CH_TOP_BACK_RIGHT 0x00020000
406#define CH_STEREO_LEFT 0x20000000 ///< Stereo downmix.
407#define CH_STEREO_RIGHT 0x40000000 ///< See CH_STEREO_LEFT.
408
409/** Channel mask value used for AVCodecContext.request_channel_layout
410 to indicate that the user requests the channel order of the decoder output
411 to be the native codec channel order. */
412#define CH_LAYOUT_NATIVE 0x8000000000000000LL
413
414/* Audio channel convenience macros */
415#define CH_LAYOUT_MONO (CH_FRONT_CENTER)
416#define CH_LAYOUT_STEREO (CH_FRONT_LEFT|CH_FRONT_RIGHT)
417#define CH_LAYOUT_2_1 (CH_LAYOUT_STEREO|CH_BACK_CENTER)
418#define CH_LAYOUT_SURROUND (CH_LAYOUT_STEREO|CH_FRONT_CENTER)
419#define CH_LAYOUT_4POINT0 (CH_LAYOUT_SURROUND|CH_BACK_CENTER)
420#define CH_LAYOUT_2_2 (CH_LAYOUT_STEREO|CH_SIDE_LEFT|CH_SIDE_RIGHT)
421#define CH_LAYOUT_QUAD (CH_LAYOUT_STEREO|CH_BACK_LEFT|CH_BACK_RIGHT)
422#define CH_LAYOUT_5POINT0 (CH_LAYOUT_SURROUND|CH_SIDE_LEFT|CH_SIDE_RIGHT)
423#define CH_LAYOUT_5POINT1 (CH_LAYOUT_5POINT0|CH_LOW_FREQUENCY)
424#define CH_LAYOUT_5POINT0_BACK (CH_LAYOUT_SURROUND|CH_BACK_LEFT|CH_BACK_RIGHT)
425#define CH_LAYOUT_5POINT1_BACK (CH_LAYOUT_5POINT0_BACK|CH_LOW_FREQUENCY)
426#define CH_LAYOUT_7POINT0 (CH_LAYOUT_5POINT0|CH_BACK_LEFT|CH_BACK_RIGHT)
427#define CH_LAYOUT_7POINT1 (CH_LAYOUT_5POINT1|CH_BACK_LEFT|CH_BACK_RIGHT)
428#define CH_LAYOUT_7POINT1_WIDE (CH_LAYOUT_5POINT1_BACK|\
429 CH_FRONT_LEFT_OF_CENTER|CH_FRONT_RIGHT_OF_CENTER)
430#define CH_LAYOUT_STEREO_DOWNMIX (CH_STEREO_LEFT|CH_STEREO_RIGHT)
431
432/* in bytes */
433#define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
434
435/**
436 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
437 * This is mainly needed because some optimized bitstream readers read
438 * 32 or 64 bit at once and could read over the end.<br>
439 * Note: If the first 23 bits of the additional bytes are not 0, then damaged
440 * MPEG bitstreams could cause overread and segfault.
441 */
442#define FF_INPUT_BUFFER_PADDING_SIZE 8
443
444/**
445 * minimum encoding buffer size
446 * Used to avoid some checks during header writing.
447 */
448#define FF_MIN_BUFFER_SIZE 16384
449
450
451/**
452 * motion estimation type.
453 */
454enum Motion_Est_ID {
455 ME_ZERO = 1, ///< no search, that is use 0,0 vector whenever one is needed
456 ME_FULL,
457 ME_LOG,
458 ME_PHODS,
459 ME_EPZS, ///< enhanced predictive zonal search
460 ME_X1, ///< reserved for experiments
461 ME_HEX, ///< hexagon based search
462 ME_UMH, ///< uneven multi-hexagon search
463 ME_ITER, ///< iterative search
464 ME_TESA, ///< transformed exhaustive search algorithm
465};
466
467enum AVDiscard{
468 /* We leave some space between them for extensions (drop some
469 * keyframes for intra-only or drop just some bidir frames). */
470 AVDISCARD_NONE =-16, ///< discard nothing
471 AVDISCARD_DEFAULT= 0, ///< discard useless packets like 0 size packets in avi
472 AVDISCARD_NONREF = 8, ///< discard all non reference
473 AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
474 AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
475 AVDISCARD_ALL = 48, ///< discard all
476};
477
478enum AVColorPrimaries{
479 AVCOL_PRI_BT709 =1, ///< also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP177 Annex B
480 AVCOL_PRI_UNSPECIFIED=2,
481 AVCOL_PRI_BT470M =4,
482 AVCOL_PRI_BT470BG =5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM
483 AVCOL_PRI_SMPTE170M =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC
484 AVCOL_PRI_SMPTE240M =7, ///< functionally identical to above
485 AVCOL_PRI_FILM =8,
486 AVCOL_PRI_NB , ///< Not part of ABI
487};
488
489enum AVColorTransferCharacteristic{
490 AVCOL_TRC_BT709 =1, ///< also ITU-R BT1361
491 AVCOL_TRC_UNSPECIFIED=2,
492 AVCOL_TRC_GAMMA22 =4, ///< also ITU-R BT470M / ITU-R BT1700 625 PAL & SECAM
493 AVCOL_TRC_GAMMA28 =5, ///< also ITU-R BT470BG
494 AVCOL_TRC_NB , ///< Not part of ABI
495};
496
497enum AVColorSpace{
498 AVCOL_SPC_RGB =0,
499 AVCOL_SPC_BT709 =1, ///< also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
500 AVCOL_SPC_UNSPECIFIED=2,
501 AVCOL_SPC_FCC =4,
502 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
503 AVCOL_SPC_SMPTE170M =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC / functionally identical to above
504 AVCOL_SPC_SMPTE240M =7,
505 AVCOL_SPC_NB , ///< Not part of ABI
506};
507
508enum AVColorRange{
509 AVCOL_RANGE_UNSPECIFIED=0,
510 AVCOL_RANGE_MPEG =1, ///< the normal 219*2^(n-8) "MPEG" YUV ranges
511 AVCOL_RANGE_JPEG =2, ///< the normal 2^n-1 "JPEG" YUV ranges
512 AVCOL_RANGE_NB , ///< Not part of ABI
513};
514
515/**
516 * X X 3 4 X X are luma samples,
517 * 1 2 1-6 are possible chroma positions
518 * X X 5 6 X 0 is undefined/unknown position
519 */
520enum AVChromaLocation{
521 AVCHROMA_LOC_UNSPECIFIED=0,
522 AVCHROMA_LOC_LEFT =1, ///< mpeg2/4, h264 default
523 AVCHROMA_LOC_CENTER =2, ///< mpeg1, jpeg, h263
524 AVCHROMA_LOC_TOPLEFT =3, ///< DV
525 AVCHROMA_LOC_TOP =4,
526 AVCHROMA_LOC_BOTTOMLEFT =5,
527 AVCHROMA_LOC_BOTTOM =6,
528 AVCHROMA_LOC_NB , ///< Not part of ABI
529};
530
531/**
532 * LPC analysis type
533 */
534enum AVLPCType {
535 AV_LPC_TYPE_DEFAULT = -1, ///< use the codec default LPC type
536 AV_LPC_TYPE_NONE = 0, ///< do not use LPC prediction or use all zero coefficients
537 AV_LPC_TYPE_FIXED = 1, ///< fixed LPC coefficients
538 AV_LPC_TYPE_LEVINSON = 2, ///< Levinson-Durbin recursion
539 AV_LPC_TYPE_CHOLESKY = 3, ///< Cholesky factorization
540 AV_LPC_TYPE_NB , ///< Not part of ABI
541};
542
543typedef struct RcOverride{
544 int start_frame;
545 int end_frame;
546 int qscale; // If this is 0 then quality_factor will be used instead.
547 float quality_factor;
548} RcOverride;
549
550#define FF_MAX_B_FRAMES 16
551
552/* encoding support
553 These flags can be passed in AVCodecContext.flags before initialization.
554 Note: Not everything is supported yet.
555*/
556
557#define CODEC_FLAG_QSCALE 0x0002 ///< Use fixed qscale.
558#define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / advanced prediction for H.263.
559#define CODEC_FLAG_QPEL 0x0010 ///< Use qpel MC.
560#define CODEC_FLAG_GMC 0x0020 ///< Use GMC.
561#define CODEC_FLAG_MV0 0x0040 ///< Always try a MB with MV=<0,0>.
562#define CODEC_FLAG_PART 0x0080 ///< Use data partitioning.
563/**
564 * The parent program guarantees that the input for B-frames containing
565 * streams is not written to for at least s->max_b_frames+1 frames, if
566 * this is not set the input will be copied.
567 */
568#define CODEC_FLAG_INPUT_PRESERVED 0x0100
569#define CODEC_FLAG_PASS1 0x0200 ///< Use internal 2pass ratecontrol in first pass mode.
570#define CODEC_FLAG_PASS2 0x0400 ///< Use internal 2pass ratecontrol in second pass mode.
571#define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< Use external Huffman table (for MJPEG).
572#define CODEC_FLAG_GRAY 0x2000 ///< Only decode/encode grayscale.
573#define CODEC_FLAG_EMU_EDGE 0x4000 ///< Don't draw edges.
574#define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding.
575#define CODEC_FLAG_TRUNCATED 0x00010000 /** Input bitstream might be truncated at a random
576 location instead of only at frame boundaries. */
577#define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< Normalize adaptive quantization.
578#define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT.
579#define CODEC_FLAG_LOW_DELAY 0x00080000 ///< Force low delay.
580#define CODEC_FLAG_ALT_SCAN 0x00100000 ///< Use alternate scan.
581#define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< Place global headers in extradata instead of every keyframe.
582#define CODEC_FLAG_BITEXACT 0x00800000 ///< Use only bitexact stuff (except (I)DCT).
583/* Fx : Flag for h263+ extra options */
584#define CODEC_FLAG_AC_PRED 0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction
585#define CODEC_FLAG_H263P_UMV 0x02000000 ///< unlimited motion vector
586#define CODEC_FLAG_CBP_RD 0x04000000 ///< Use rate distortion optimization for cbp.
587#define CODEC_FLAG_QP_RD 0x08000000 ///< Use rate distortion optimization for qp selectioon.
588#define CODEC_FLAG_H263P_AIV 0x00000008 ///< H.263 alternative inter VLC
589#define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
590#define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
591#define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
592#define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
593#define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< Will reserve space for SVCD scan offset user data.
594#define CODEC_FLAG_CLOSED_GOP 0x80000000
595#define CODEC_FLAG2_FAST 0x00000001 ///< Allow non spec compliant speedup tricks.
596#define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< Strictly enforce GOP size.
597#define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< Skip bitstream encoding.
598#define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< Place global headers at every keyframe instead of in extradata.
599#define CODEC_FLAG2_BPYRAMID 0x00000010 ///< H.264 allow B-frames to be used as references.
600#define CODEC_FLAG2_WPRED 0x00000020 ///< H.264 weighted biprediction for B-frames
601#define CODEC_FLAG2_MIXED_REFS 0x00000040 ///< H.264 one reference per partition, as opposed to one reference per macroblock
602#define CODEC_FLAG2_8X8DCT 0x00000080 ///< H.264 high profile 8x8 transform
603#define CODEC_FLAG2_FASTPSKIP 0x00000100 ///< H.264 fast pskip
604#define CODEC_FLAG2_AUD 0x00000200 ///< H.264 access unit delimiters
605#define CODEC_FLAG2_BRDO 0x00000400 ///< B-frame rate-distortion optimization
606#define CODEC_FLAG2_INTRA_VLC 0x00000800 ///< Use MPEG-2 intra VLC table.
607#define CODEC_FLAG2_MEMC_ONLY 0x00001000 ///< Only do ME/MC (I frames -> ref, P frame -> ME+MC).
608#define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format.
609#define CODEC_FLAG2_SKIP_RD 0x00004000 ///< RD optimal MB level residual skipping
610#define CODEC_FLAG2_CHUNKS 0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
611#define CODEC_FLAG2_NON_LINEAR_QUANT 0x00010000 ///< Use MPEG-2 nonlinear quantizer.
612#define CODEC_FLAG2_BIT_RESERVOIR 0x00020000 ///< Use a bit reservoir when encoding if possible
613#define CODEC_FLAG2_MBTREE 0x00040000 ///< Use macroblock tree ratecontrol (x264 only)
614#define CODEC_FLAG2_PSY 0x00080000 ///< Use psycho visual optimizations.
615#define CODEC_FLAG2_SSIM 0x00100000 ///< Compute SSIM during encoding, error[] values are undefined.
616#define CODEC_FLAG2_INTRA_REFRESH 0x00200000 ///< Use periodic insertion of intra blocks instead of keyframes.
617
618/* Unsupported options :
619 * Syntax Arithmetic coding (SAC)
620 * Reference Picture Selection
621 * Independent Segment Decoding */
622/* /Fx */
623/* codec capabilities */
624
625#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback.
626/**
627 * Codec uses get_buffer() for allocating buffers and supports custom allocators.
628 * If not set, it might not use get_buffer() at all or use operations that
629 * assume the buffer was allocated by avcodec_default_get_buffer.
630 */
631#define CODEC_CAP_DR1 0x0002
632/* If 'parse_only' field is true, then avcodec_parse_frame() can be used. */
633#define CODEC_CAP_PARSE_ONLY 0x0004
634#define CODEC_CAP_TRUNCATED 0x0008
635/* Codec can export data for HW decoding (XvMC). */
636#define CODEC_CAP_HWACCEL 0x0010
637/**
638 * Codec has a nonzero delay and needs to be fed with NULL at the end to get the delayed data.
639 * If this is not set, the codec is guaranteed to never be fed with NULL data.
640 */
641#define CODEC_CAP_DELAY 0x0020
642/**
643 * Codec can be fed a final frame with a smaller size.
644 * This can be used to prevent truncation of the last audio samples.
645 */
646#define CODEC_CAP_SMALL_LAST_FRAME 0x0040
647/**
648 * Codec can export data for HW decoding (VDPAU).
649 */
650#define CODEC_CAP_HWACCEL_VDPAU 0x0080
651/**
652 * Codec can output multiple frames per AVPacket
653 * Normally demuxers return one frame at a time, demuxers which do not do
654 * are connected to a parser to split what they return into proper frames.
655 * This flag is reserved to the very rare category of codecs which have a
656 * bitstream that cannot be split into frames without timeconsuming
657 * operations like full decoding. Demuxers carring such bitstreams thus
658 * may return multiple frames in a packet. This has many disadvantages like
659 * prohibiting stream copy in many cases thus it should only be considered
660 * as a last resort.
661 */
662#define CODEC_CAP_SUBFRAMES 0x0100
663/**
664 * Codec is experimental and is thus avoided in favor of non experimental
665 * encoders
666 */
667#define CODEC_CAP_EXPERIMENTAL 0x0200
668
669//The following defines may change, don't expect compatibility if you use them.
670#define MB_TYPE_INTRA4x4 0x0001
671#define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
672#define MB_TYPE_INTRA_PCM 0x0004 //FIXME H.264-specific
673#define MB_TYPE_16x16 0x0008
674#define MB_TYPE_16x8 0x0010
675#define MB_TYPE_8x16 0x0020
676#define MB_TYPE_8x8 0x0040
677#define MB_TYPE_INTERLACED 0x0080
678#define MB_TYPE_DIRECT2 0x0100 //FIXME
679#define MB_TYPE_ACPRED 0x0200
680#define MB_TYPE_GMC 0x0400
681#define MB_TYPE_SKIP 0x0800
682#define MB_TYPE_P0L0 0x1000
683#define MB_TYPE_P1L0 0x2000
684#define MB_TYPE_P0L1 0x4000
685#define MB_TYPE_P1L1 0x8000
686#define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
687#define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
688#define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
689#define MB_TYPE_QUANT 0x00010000
690#define MB_TYPE_CBP 0x00020000
691//Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
692
693/**
694 * Pan Scan area.
695 * This specifies the area which should be displayed.
696 * Note there may be multiple such areas for one frame.
697 */
698typedef struct AVPanScan{
699 /**
700 * id
701 * - encoding: Set by user.
702 * - decoding: Set by libavcodec.
703 */
704 int id;
705
706 /**
707 * width and height in 1/16 pel
708 * - encoding: Set by user.
709 * - decoding: Set by libavcodec.
710 */
711 int width;
712 int height;
713
714 /**
715 * position of the top left corner in 1/16 pel for up to 3 fields/frames
716 * - encoding: Set by user.
717 * - decoding: Set by libavcodec.
718 */
719 int16_t position[3][2];
720}AVPanScan;
721
722#define FF_COMMON_FRAME \
723 /**\
724 * pointer to the picture planes.\
725 * This might be different from the first allocated byte\
726 * - encoding: \
727 * - decoding: \
728 */\
729 uint8_t *data[4];\
730 int linesize[4];\
731 /**\
732 * pointer to the first allocated byte of the picture. Can be used in get_buffer/release_buffer.\
733 * This isn't used by libavcodec unless the default get/release_buffer() is used.\
734 * - encoding: \
735 * - decoding: \
736 */\
737 uint8_t *base[4];\
738 /**\
739 * 1 -> keyframe, 0-> not\
740 * - encoding: Set by libavcodec.\
741 * - decoding: Set by libavcodec.\
742 */\
743 int key_frame;\
744\
745 /**\
746 * Picture type of the frame, see ?_TYPE below.\
747 * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
748 * - decoding: Set by libavcodec.\
749 */\
750 int pict_type;\
751\
752 /**\
753 * presentation timestamp in time_base units (time when frame should be shown to user)\
754 * If AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed.\
755 * - encoding: MUST be set by user.\
756 * - decoding: Set by libavcodec.\
757 */\
758 int64_t pts;\
759\
760 /**\
761 * picture number in bitstream order\
762 * - encoding: set by\
763 * - decoding: Set by libavcodec.\
764 */\
765 int coded_picture_number;\
766 /**\
767 * picture number in display order\
768 * - encoding: set by\
769 * - decoding: Set by libavcodec.\
770 */\
771 int display_picture_number;\
772\
773 /**\
774 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
775 * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
776 * - decoding: Set by libavcodec.\
777 */\
778 int quality; \
779\
780 /**\
781 * buffer age (1->was last buffer and dint change, 2->..., ...).\
782 * Set to INT_MAX if the buffer has not been used yet.\
783 * - encoding: unused\
784 * - decoding: MUST be set by get_buffer().\
785 */\
786 int age;\
787\
788 /**\
789 * is this picture used as reference\
790 * The values for this are the same as the MpegEncContext.picture_structure\
791 * variable, that is 1->top field, 2->bottom field, 3->frame/both fields.\
792 * Set to 4 for delayed, non-reference frames.\
793 * - encoding: unused\
794 * - decoding: Set by libavcodec. (before get_buffer() call)).\
795 */\
796 int reference;\
797\
798 /**\
799 * QP table\
800 * - encoding: unused\
801 * - decoding: Set by libavcodec.\
802 */\
803 int8_t *qscale_table;\
804 /**\
805 * QP store stride\
806 * - encoding: unused\
807 * - decoding: Set by libavcodec.\
808 */\
809 int qstride;\
810\
811 /**\
812 * mbskip_table[mb]>=1 if MB didn't change\
813 * stride= mb_width = (width+15)>>4\
814 * - encoding: unused\
815 * - decoding: Set by libavcodec.\
816 */\
817 uint8_t *mbskip_table;\
818\
819 /**\
820 * motion vector table\
821 * @code\
822 * example:\
823 * int mv_sample_log2= 4 - motion_subsample_log2;\
824 * int mb_width= (width+15)>>4;\
825 * int mv_stride= (mb_width << mv_sample_log2) + 1;\
826 * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
827 * @endcode\
828 * - encoding: Set by user.\
829 * - decoding: Set by libavcodec.\
830 */\
831 int16_t (*motion_val[2])[2];\
832\
833 /**\
834 * macroblock type table\
835 * mb_type_base + mb_width + 2\
836 * - encoding: Set by user.\
837 * - decoding: Set by libavcodec.\
838 */\
839 uint32_t *mb_type;\
840\
841 /**\
842 * log2 of the size of the block which a single vector in motion_val represents: \
843 * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
844 * - encoding: unused\
845 * - decoding: Set by libavcodec.\
846 */\
847 uint8_t motion_subsample_log2;\
848\
849 /**\
850 * for some private data of the user\
851 * - encoding: unused\
852 * - decoding: Set by user.\
853 */\
854 void *opaque;\
855\
856 /**\
857 * error\
858 * - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR.\
859 * - decoding: unused\
860 */\
861 uint64_t error[4];\
862\
863 /**\
864 * type of the buffer (to keep track of who has to deallocate data[*])\
865 * - encoding: Set by the one who allocates it.\
866 * - decoding: Set by the one who allocates it.\
867 * Note: User allocated (direct rendering) & internal buffers cannot coexist currently.\
868 */\
869 int type;\
870 \
871 /**\
872 * When decoding, this signals how much the picture must be delayed.\
873 * extra_delay = repeat_pict / (2*fps)\
874 * - encoding: unused\
875 * - decoding: Set by libavcodec.\
876 */\
877 int repeat_pict;\
878 \
879 /**\
880 * \
881 */\
882 int qscale_type;\
883 \
884 /**\
885 * The content of the picture is interlaced.\
886 * - encoding: Set by user.\
887 * - decoding: Set by libavcodec. (default 0)\
888 */\
889 int interlaced_frame;\
890 \
891 /**\
892 * If the content is interlaced, is top field displayed first.\
893 * - encoding: Set by user.\
894 * - decoding: Set by libavcodec.\
895 */\
896 int top_field_first;\
897 \
898 /**\
899 * Pan scan.\
900 * - encoding: Set by user.\
901 * - decoding: Set by libavcodec.\
902 */\
903 AVPanScan *pan_scan;\
904 \
905 /**\
906 * Tell user application that palette has changed from previous frame.\
907 * - encoding: ??? (no palette-enabled encoder yet)\
908 * - decoding: Set by libavcodec. (default 0).\
909 */\
910 int palette_has_changed;\
911 \
912 /**\
913 * codec suggestion on buffer type if != 0\
914 * - encoding: unused\
915 * - decoding: Set by libavcodec. (before get_buffer() call)).\
916 */\
917 int buffer_hints;\
918\
919 /**\
920 * DCT coefficients\
921 * - encoding: unused\
922 * - decoding: Set by libavcodec.\
923 */\
924 short *dct_coeff;\
925\
926 /**\
927 * motion reference frame index\
928 * the order in which these are stored can depend on the codec.\
929 * - encoding: Set by user.\
930 * - decoding: Set by libavcodec.\
931 */\
932 int8_t *ref_index[2];\
933\
934 /**\
935 * reordered opaque 64bit number (generally a PTS) from AVCodecContext.reordered_opaque\
936 * output in AVFrame.reordered_opaque\
937 * - encoding: unused\
938 * - decoding: Read by user.\
939 */\
940 int64_t reordered_opaque;\
941\
942 /**\
943 * hardware accelerator private data (FFmpeg allocated)\
944 * - encoding: unused\
945 * - decoding: Set by libavcodec\
946 */\
947 void *hwaccel_picture_private;\
948
949
950#define FF_QSCALE_TYPE_MPEG1 0
951#define FF_QSCALE_TYPE_MPEG2 1
952#define FF_QSCALE_TYPE_H264 2
953#define FF_QSCALE_TYPE_VP56 3
954
955#define FF_BUFFER_TYPE_INTERNAL 1
956#define FF_BUFFER_TYPE_USER 2 ///< direct rendering buffers (image is (de)allocated by user)
957#define FF_BUFFER_TYPE_SHARED 4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared.
958#define FF_BUFFER_TYPE_COPY 8 ///< Just a (modified) copy of some other buffer, don't deallocate anything.
959
960
961#define FF_I_TYPE 1 ///< Intra
962#define FF_P_TYPE 2 ///< Predicted
963#define FF_B_TYPE 3 ///< Bi-dir predicted
964#define FF_S_TYPE 4 ///< S(GMC)-VOP MPEG4
965#define FF_SI_TYPE 5 ///< Switching Intra
966#define FF_SP_TYPE 6 ///< Switching Predicted
967#define FF_BI_TYPE 7
968
969#define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore).
970#define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer.
971#define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content.
972#define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update).
973
974typedef struct AVPacket {
975 /**
976 * Presentation timestamp in AVStream->time_base units; the time at which
977 * the decompressed packet will be presented to the user.
978 * Can be AV_NOPTS_VALUE if it is not stored in the file.
979 * pts MUST be larger or equal to dts as presentation cannot happen before
980 * decompression, unless one wants to view hex dumps. Some formats misuse
981 * the terms dts and pts/cts to mean something different. Such timestamps
982 * must be converted to true pts/dts before they are stored in AVPacket.
983 */
984 int64_t pts;
985 /**
986 * Decompression timestamp in AVStream->time_base units; the time at which
987 * the packet is decompressed.
988 * Can be AV_NOPTS_VALUE if it is not stored in the file.
989 */
990 int64_t dts;
991 uint8_t *data;
992 int size;
993 int stream_index;
994 int flags;
995 /**
996 * Duration of this packet in AVStream->time_base units, 0 if unknown.
997 * Equals next_pts - this_pts in presentation order.
998 */
999 int duration;
1000 void (*destruct)(struct AVPacket *);
1001 void *priv;
1002 int64_t pos; ///< byte position in stream, -1 if unknown
1003
1004 /**
1005 * Time difference in AVStream->time_base units from the pts of this
1006 * packet to the point at which the output from the decoder has converged
1007 * independent from the availability of previous frames. That is, the
1008 * frames are virtually identical no matter if decoding started from
1009 * the very first frame or from this keyframe.
1010 * Is AV_NOPTS_VALUE if unknown.
1011 * This field is not the display duration of the current packet.
1012 * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
1013 * set.
1014 *
1015 * The purpose of this field is to allow seeking in streams that have no
1016 * keyframes in the conventional sense. It corresponds to the
1017 * recovery point SEI in H.264 and match_time_delta in NUT. It is also
1018 * essential for some types of subtitle streams to ensure that all
1019 * subtitles are correctly displayed after seeking.
1020 */
1021 int64_t convergence_duration;
1022} AVPacket;
1023#define AV_PKT_FLAG_KEY 0x0001
1024#if LIBAVCODEC_VERSION_MAJOR < 53
1025#define PKT_FLAG_KEY AV_PKT_FLAG_KEY
1026#endif
1027
1028/**
1029 * Audio Video Frame.
1030 * New fields can be added to the end of FF_COMMON_FRAME with minor version
1031 * bumps.
1032 * Removal, reordering and changes to existing fields require a major
1033 * version bump. No fields should be added into AVFrame before or after
1034 * FF_COMMON_FRAME!
1035 * sizeof(AVFrame) must not be used outside libav*.
1036 */
1037typedef struct AVFrame {
1038 FF_COMMON_FRAME
1039} AVFrame;
1040
1041/**
1042 * main external API structure.
1043 * New fields can be added to the end with minor version bumps.
1044 * Removal, reordering and changes to existing fields require a major
1045 * version bump.
1046 * sizeof(AVCodecContext) must not be used outside libav*.
1047 */
1048typedef struct AVCodecContext {
1049 /**
1050 * information on struct for av_log
1051 * - set by avcodec_alloc_context
1052 */
1053 const AVClass *av_class;
1054 /**
1055 * the average bitrate
1056 * - encoding: Set by user; unused for constant quantizer encoding.
1057 * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.
1058 */
1059 int bit_rate;
1060
1061 /**
1062 * number of bits the bitstream is allowed to diverge from the reference.
1063 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
1064 * - encoding: Set by user; unused for constant quantizer encoding.
1065 * - decoding: unused
1066 */
1067 int bit_rate_tolerance;
1068
1069 /**
1070 * CODEC_FLAG_*.
1071 * - encoding: Set by user.
1072 * - decoding: Set by user.
1073 */
1074 int flags;
1075
1076 /**
1077 * Some codecs need additional format info. It is stored here.
1078 * If any muxer uses this then ALL demuxers/parsers AND encoders for the
1079 * specific codec MUST set it correctly otherwise stream copy breaks.
1080 * In general use of this field by muxers is not recommanded.
1081 * - encoding: Set by libavcodec.
1082 * - decoding: Set by libavcodec. (FIXME: Is this OK?)
1083 */
1084 int sub_id;
1085
1086 /**
1087 * Motion estimation algorithm used for video coding.
1088 * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
1089 * 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific]
1090 * - encoding: MUST be set by user.
1091 * - decoding: unused
1092 */
1093 int me_method;
1094
1095 /**
1096 * some codecs need / can use extradata like Huffman tables.
1097 * mjpeg: Huffman tables
1098 * rv10: additional flags
1099 * mpeg4: global headers (they can be in the bitstream or here)
1100 * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
1101 * than extradata_size to avoid prolems if it is read with the bitstream reader.
1102 * The bytewise contents of extradata must not depend on the architecture or CPU endianness.
1103 * - encoding: Set/allocated/freed by libavcodec.
1104 * - decoding: Set/allocated/freed by user.
1105 */
1106 uint8_t *extradata;
1107 int extradata_size;
1108
1109 /**
1110 * This is the fundamental unit of time (in seconds) in terms
1111 * of which frame timestamps are represented. For fixed-fps content,
1112 * timebase should be 1/framerate and timestamp increments should be
1113 * identically 1.
1114 * - encoding: MUST be set by user.
1115 * - decoding: Set by libavcodec.
1116 */
1117 //AVRational time_base;
1118
1119 /* video only */
1120 /**
1121 * picture width / height.
1122 * - encoding: MUST be set by user.
1123 * - decoding: Set by libavcodec.
1124 * Note: For compatibility it is possible to set this instead of
1125 * coded_width/height before decoding.
1126 */
1127 int width, height;
1128
1129#define FF_ASPECT_EXTENDED 15
1130
1131 /**
1132 * the number of pictures in a group of pictures, or 0 for intra_only
1133 * - encoding: Set by user.
1134 * - decoding: unused
1135 */
1136 int gop_size;
1137
1138 /**
1139 * Pixel format, see PIX_FMT_xxx.
1140 * May be set by the demuxer if known from headers.
1141 * May be overriden by the decoder if it knows better.
1142 * - encoding: Set by user.
1143 * - decoding: Set by user if known, overridden by libavcodec if known
1144 */
1145 //enum PixelFormat pix_fmt;
1146
1147 /**
1148 * Frame rate emulation. If not zero, the lower layer (i.e. format handler)
1149 * has to read frames at native frame rate.
1150 * - encoding: Set by user.
1151 * - decoding: unused
1152 */
1153 int rate_emu;
1154
1155 /**
1156 * If non NULL, 'draw_horiz_band' is called by the libavcodec
1157 * decoder to draw a horizontal band. It improves cache usage. Not
1158 * all codecs can do that. You must check the codec capabilities
1159 * beforehand.
1160 * The function is also used by hardware acceleration APIs.
1161 * It is called at least once during frame decoding to pass
1162 * the data needed for hardware render.
1163 * In that mode instead of pixel data, AVFrame points to
1164 * a structure specific to the acceleration API. The application
1165 * reads the structure and can change some fields to indicate progress
1166 * or mark state.
1167 * - encoding: unused
1168 * - decoding: Set by user.
1169 * @param height the height of the slice
1170 * @param y the y position of the slice
1171 * @param type 1->top field, 2->bottom field, 3->frame
1172 * @param offset offset into the AVFrame.data from which the slice should be read
1173 */
1174 void (*draw_horiz_band)(struct AVCodecContext *s,
1175 const AVFrame *src, int offset[4],
1176 int y, int type, int height);
1177
1178 /* audio only */
1179 int sample_rate; ///< samples per second
1180 int channels; ///< number of audio channels
1181
1182 /**
1183 * audio sample format
1184 * - encoding: Set by user.
1185 * - decoding: Set by libavcodec.
1186 */
1187 enum SampleFormat sample_fmt; ///< sample format
1188
1189 /* The following data should not be initialized. */
1190 /**
1191 * Samples per packet, initialized when calling 'init'.
1192 */
1193 int frame_size;
1194 int frame_number; ///< audio or video frame number
1195#if LIBAVCODEC_VERSION_MAJOR < 53
1196 int real_pict_num; ///< Returns the real picture number of previous encoded frame.
1197#endif
1198
1199 /**
1200 * Number of frames the decoded output will be delayed relative to
1201 * the encoded input.
1202 * - encoding: Set by libavcodec.
1203 * - decoding: unused
1204 */
1205 int delay;
1206
1207 /* - encoding parameters */
1208 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
1209 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
1210
1211 /**
1212 * minimum quantizer
1213 * - encoding: Set by user.
1214 * - decoding: unused
1215 */
1216 int qmin;
1217
1218 /**
1219 * maximum quantizer
1220 * - encoding: Set by user.
1221 * - decoding: unused
1222 */
1223 int qmax;
1224
1225 /**
1226 * maximum quantizer difference between frames
1227 * - encoding: Set by user.
1228 * - decoding: unused
1229 */
1230 int max_qdiff;
1231
1232 /**
1233 * maximum number of B-frames between non-B-frames
1234 * Note: The output will be delayed by max_b_frames+1 relative to the input.
1235 * - encoding: Set by user.
1236 * - decoding: unused
1237 */
1238 int max_b_frames;
1239
1240 /**
1241 * qscale factor between IP and B-frames
1242 * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
1243 * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1244 * - encoding: Set by user.
1245 * - decoding: unused
1246 */
1247 float b_quant_factor;
1248
1249 /** obsolete FIXME remove */
1250 int rc_strategy;
1251#define FF_RC_STRATEGY_XVID 1
1252
1253 int b_frame_strategy;
1254
1255 /**
1256 * hurry up amount
1257 * - encoding: unused
1258 * - decoding: Set by user. 1-> Skip B-frames, 2-> Skip IDCT/dequant too, 5-> Skip everything except header
1259 * @deprecated Deprecated in favor of skip_idct and skip_frame.
1260 */
1261 int hurry_up;
1262
1263 struct AVCodec *codec;
1264
1265 void *priv_data;
1266
1267 int rtp_payload_size; /* The size of the RTP payload: the coder will */
1268 /* do its best to deliver a chunk with size */
1269 /* below rtp_payload_size, the chunk will start */
1270 /* with a start code on some codecs like H.263. */
1271 /* This doesn't take account of any particular */
1272 /* headers inside the transmitted RTP payload. */
1273
1274
1275 /* The RTP callback: This function is called */
1276 /* every time the encoder has a packet to send. */
1277 /* It depends on the encoder if the data starts */
1278 /* with a Start Code (it should). H.263 does. */
1279 /* mb_nb contains the number of macroblocks */
1280 /* encoded in the RTP payload. */
1281 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
1282
1283 /* statistics, used for 2-pass encoding */
1284 int mv_bits;
1285 int header_bits;
1286 int i_tex_bits;
1287 int p_tex_bits;
1288 int i_count;
1289 int p_count;
1290 int skip_count;
1291 int misc_bits;
1292
1293 /**
1294 * number of bits used for the previously encoded frame
1295 * - encoding: Set by libavcodec.
1296 * - decoding: unused
1297 */
1298 int frame_bits;
1299
1300 /**
1301 * Private data of the user, can be used to carry app specific stuff.
1302 * - encoding: Set by user.
1303 * - decoding: Set by user.
1304 */
1305 void *opaque;
1306
1307 char codec_name[32];
1308 enum AVMediaType codec_type; /* see AVMEDIA_TYPE_xxx */
1309 enum CodecID codec_id; /* see CODEC_ID_xxx */
1310
1311 /**
1312 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1313 * This is used to work around some encoder bugs.
1314 * A demuxer should set this to what is stored in the field used to identify the codec.
1315 * If there are multiple such fields in a container then the demuxer should choose the one
1316 * which maximizes the information about the used codec.
1317 * If the codec tag field in a container is larger then 32 bits then the demuxer should
1318 * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
1319 * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
1320 * first.
1321 * - encoding: Set by user, if not then the default based on codec_id will be used.
1322 * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1323 */
1324 unsigned int codec_tag;
1325
1326 /**
1327 * Work around bugs in encoders which sometimes cannot be detected automatically.
1328 * - encoding: Set by user
1329 * - decoding: Set by user
1330 */
1331 int workaround_bugs;
1332#define FF_BUG_AUTODETECT 1 ///< autodetection
1333#define FF_BUG_OLD_MSMPEG4 2
1334#define FF_BUG_XVID_ILACE 4
1335#define FF_BUG_UMP4 8
1336#define FF_BUG_NO_PADDING 16
1337#define FF_BUG_AMV 32
1338#define FF_BUG_AC_VLC 0 ///< Will be removed, libavcodec can now handle these non-compliant files by default.
1339#define FF_BUG_QPEL_CHROMA 64
1340#define FF_BUG_STD_QPEL 128
1341#define FF_BUG_QPEL_CHROMA2 256
1342#define FF_BUG_DIRECT_BLOCKSIZE 512
1343#define FF_BUG_EDGE 1024
1344#define FF_BUG_HPEL_CHROMA 2048
1345#define FF_BUG_DC_CLIP 4096
1346#define FF_BUG_MS 8192 ///< Work around various bugs in Microsoft's broken decoders.
1347#define FF_BUG_TRUNCATED 16384
1348//#define FF_BUG_FAKE_SCALABILITY 16 //Autodetection should work 100%.
1349
1350 /**
1351 * luma single coefficient elimination threshold
1352 * - encoding: Set by user.
1353 * - decoding: unused
1354 */
1355 int luma_elim_threshold;
1356
1357 /**
1358 * chroma single coeff elimination threshold
1359 * - encoding: Set by user.
1360 * - decoding: unused
1361 */
1362 int chroma_elim_threshold;
1363
1364 /**
1365 * strictly follow the standard (MPEG4, ...).
1366 * - encoding: Set by user.
1367 * - decoding: Set by user.
1368 * Setting this to STRICT or higher means the encoder and decoder will
1369 * generally do stupid things, whereas setting it to unofficial or lower
1370 * will mean the encoder might produce output that is not supported by all
1371 * spec-compliant decoders. Decoders don't differentiate between normal,
1372 * unofficial and experimental (that is, they always try to decode things
1373 * when they can) unless they are explicitly asked to behave stupidly
1374 * (=strictly conform to the specs)
1375 */
1376 int strict_std_compliance;
1377#define FF_COMPLIANCE_VERY_STRICT 2 ///< Strictly conform to an older more strict version of the spec or reference software.
1378#define FF_COMPLIANCE_STRICT 1 ///< Strictly conform to all the things in the spec no matter what consequences.
1379#define FF_COMPLIANCE_NORMAL 0
1380#if LIBAVCODEC_VERSION_MAJOR < 53
1381#define FF_COMPLIANCE_INOFFICIAL -1 ///< Allow inofficial extensions (deprecated - use FF_COMPLIANCE_UNOFFICIAL instead).
1382#endif
1383#define FF_COMPLIANCE_UNOFFICIAL -1 ///< Allow unofficial extensions
1384#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
1385
1386 /**
1387 * qscale offset between IP and B-frames
1388 * - encoding: Set by user.
1389 * - decoding: unused
1390 */
1391 float b_quant_offset;
1392
1393 /**
1394 * Error recognization; higher values will detect more errors but may
1395 * misdetect some more or less valid parts as errors.
1396 * - encoding: unused
1397 * - decoding: Set by user.
1398 */
1399 int error_recognition;
1400#define FF_ER_CAREFUL 1
1401#define FF_ER_COMPLIANT 2
1402#define FF_ER_AGGRESSIVE 3
1403#define FF_ER_VERY_AGGRESSIVE 4
1404
1405 /**
1406 * Called at the beginning of each frame to get a buffer for it.
1407 * If pic.reference is set then the frame will be read later by libavcodec.
1408 * avcodec_align_dimensions2() should be used to find the required width and
1409 * height, as they normally need to be rounded up to the next multiple of 16.
1410 * if CODEC_CAP_DR1 is not set then get_buffer() must call
1411 * avcodec_default_get_buffer() instead of providing buffers allocated by
1412 * some other means.
1413 * - encoding: unused
1414 * - decoding: Set by libavcodec, user can override.
1415 */
1416 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1417
1418 /**
1419 * Called to release buffers which were allocated with get_buffer.
1420 * A released buffer can be reused in get_buffer().
1421 * pic.data[*] must be set to NULL.
1422 * - encoding: unused
1423 * - decoding: Set by libavcodec, user can override.
1424 */
1425 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1426
1427 /**
1428 * Size of the frame reordering buffer in the decoder.
1429 * For MPEG-2 it is 1 IPB or 0 low delay IP.
1430 * - encoding: Set by libavcodec.
1431 * - decoding: Set by libavcodec.
1432 */
1433 int has_b_frames;
1434
1435 /**
1436 * number of bytes per packet if constant and known or 0
1437 * Used by some WAV based audio codecs.
1438 */
1439 int block_align;
1440
1441 int parse_only; /* - decoding only: If true, only parsing is done
1442 (function avcodec_parse_frame()). The frame
1443 data is returned. Only MPEG codecs support this now. */
1444
1445 /**
1446 * 0-> h263 quant 1-> mpeg quant
1447 * - encoding: Set by user.
1448 * - decoding: unused
1449 */
1450 int mpeg_quant;
1451
1452 /**
1453 * pass1 encoding statistics output buffer
1454 * - encoding: Set by libavcodec.
1455 * - decoding: unused
1456 */
1457 char *stats_out;
1458
1459 /**
1460 * pass2 encoding statistics input buffer
1461 * Concatenated stuff from stats_out of pass1 should be placed here.
1462 * - encoding: Allocated/set/freed by user.
1463 * - decoding: unused
1464 */
1465 char *stats_in;
1466
1467 /**
1468 * ratecontrol qmin qmax limiting method
1469 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
1470 * - encoding: Set by user.
1471 * - decoding: unused
1472 */
1473 float rc_qsquish;
1474
1475 float rc_qmod_amp;
1476 int rc_qmod_freq;
1477
1478 /**
1479 * ratecontrol override, see RcOverride
1480 * - encoding: Allocated/set/freed by user.
1481 * - decoding: unused
1482 */
1483 RcOverride *rc_override;
1484 int rc_override_count;
1485
1486 /**
1487 * rate control equation
1488 * - encoding: Set by user
1489 * - decoding: unused
1490 */
1491 const char *rc_eq;
1492
1493 /**
1494 * maximum bitrate
1495 * - encoding: Set by user.
1496 * - decoding: unused
1497 */
1498 int rc_max_rate;
1499
1500 /**
1501 * minimum bitrate
1502 * - encoding: Set by user.
1503 * - decoding: unused
1504 */
1505 int rc_min_rate;
1506
1507 /**
1508 * decoder bitstream buffer size
1509 * - encoding: Set by user.
1510 * - decoding: unused
1511 */
1512 int rc_buffer_size;
1513 float rc_buffer_aggressivity;
1514
1515 /**
1516 * qscale factor between P and I-frames
1517 * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
1518 * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1519 * - encoding: Set by user.
1520 * - decoding: unused
1521 */
1522 float i_quant_factor;
1523
1524 /**
1525 * qscale offset between P and I-frames
1526 * - encoding: Set by user.
1527 * - decoding: unused
1528 */
1529 float i_quant_offset;
1530
1531 /**
1532 * initial complexity for pass1 ratecontrol
1533 * - encoding: Set by user.
1534 * - decoding: unused
1535 */
1536 float rc_initial_cplx;
1537
1538 /**
1539 * DCT algorithm, see FF_DCT_* below
1540 * - encoding: Set by user.
1541 * - decoding: unused
1542 */
1543 int dct_algo;
1544#define FF_DCT_AUTO 0
1545#define FF_DCT_FASTINT 1
1546#define FF_DCT_INT 2
1547#define FF_DCT_MMX 3
1548#define FF_DCT_MLIB 4
1549#define FF_DCT_ALTIVEC 5
1550#define FF_DCT_FAAN 6
1551
1552 /**
1553 * luminance masking (0-> disabled)
1554 * - encoding: Set by user.
1555 * - decoding: unused
1556 */
1557 float lumi_masking;
1558
1559 /**
1560 * temporary complexity masking (0-> disabled)
1561 * - encoding: Set by user.
1562 * - decoding: unused
1563 */
1564 float temporal_cplx_masking;
1565
1566 /**
1567 * spatial complexity masking (0-> disabled)
1568 * - encoding: Set by user.
1569 * - decoding: unused
1570 */
1571 float spatial_cplx_masking;
1572
1573 /**
1574 * p block masking (0-> disabled)
1575 * - encoding: Set by user.
1576 * - decoding: unused
1577 */
1578 float p_masking;
1579
1580 /**
1581 * darkness masking (0-> disabled)
1582 * - encoding: Set by user.
1583 * - decoding: unused
1584 */
1585 float dark_masking;
1586
1587 /**
1588 * IDCT algorithm, see FF_IDCT_* below.
1589 * - encoding: Set by user.
1590 * - decoding: Set by user.
1591 */
1592 int idct_algo;
1593#define FF_IDCT_AUTO 0
1594#define FF_IDCT_INT 1
1595#define FF_IDCT_SIMPLE 2
1596#define FF_IDCT_SIMPLEMMX 3
1597#define FF_IDCT_LIBMPEG2MMX 4
1598#define FF_IDCT_PS2 5
1599#define FF_IDCT_MLIB 6
1600#define FF_IDCT_ARM 7
1601#define FF_IDCT_ALTIVEC 8
1602#define FF_IDCT_SH4 9
1603#define FF_IDCT_SIMPLEARM 10
1604#define FF_IDCT_H264 11
1605#define FF_IDCT_VP3 12
1606#define FF_IDCT_IPP 13
1607#define FF_IDCT_XVIDMMX 14
1608#define FF_IDCT_CAVS 15
1609#define FF_IDCT_SIMPLEARMV5TE 16
1610#define FF_IDCT_SIMPLEARMV6 17
1611#define FF_IDCT_SIMPLEVIS 18
1612#define FF_IDCT_WMV2 19
1613#define FF_IDCT_FAAN 20
1614#define FF_IDCT_EA 21
1615#define FF_IDCT_SIMPLENEON 22
1616#define FF_IDCT_SIMPLEALPHA 23
1617#define FF_IDCT_BINK 24
1618
1619 /**
1620 * slice count
1621 * - encoding: Set by libavcodec.
1622 * - decoding: Set by user (or 0).
1623 */
1624 int slice_count;
1625 /**
1626 * slice offsets in the frame in bytes
1627 * - encoding: Set/allocated by libavcodec.
1628 * - decoding: Set/allocated by user (or NULL).
1629 */
1630 int *slice_offset;
1631
1632 /**
1633 * error concealment flags
1634 * - encoding: unused
1635 * - decoding: Set by user.
1636 */
1637 int error_concealment;
1638#define FF_EC_GUESS_MVS 1
1639#define FF_EC_DEBLOCK 2
1640
1641 /**
1642 * dsp_mask could be add used to disable unwanted CPU features
1643 * CPU features (i.e. MMX, SSE. ...)
1644 *
1645 * With the FORCE flag you may instead enable given CPU features.
1646 * (Dangerous: Usable in case of misdetection, improper usage however will
1647 * result into program crash.)
1648 */
1649 unsigned dsp_mask;
1650#define FF_MM_FORCE 0x80000000 /* Force usage of selected flags (OR) */
1651 /* lower 16 bits - CPU features */
1652#define FF_MM_MMX 0x0001 ///< standard MMX
1653#define FF_MM_3DNOW 0x0004 ///< AMD 3DNOW
1654#if LIBAVCODEC_VERSION_MAJOR < 53
1655#define FF_MM_MMXEXT 0x0002 ///< SSE integer functions or AMD MMX ext
1656#endif
1657#define FF_MM_MMX2 0x0002 ///< SSE integer functions or AMD MMX ext
1658#define FF_MM_SSE 0x0008 ///< SSE functions
1659#define FF_MM_SSE2 0x0010 ///< PIV SSE2 functions
1660#define FF_MM_SSE2SLOW 0x40000000 ///< SSE2 supported, but usually not faster
1661 ///< than regular MMX/SSE (e.g. Core1)
1662#define FF_MM_3DNOWEXT 0x0020 ///< AMD 3DNowExt
1663#define FF_MM_SSE3 0x0040 ///< Prescott SSE3 functions
1664#define FF_MM_SSE3SLOW 0x20000000 ///< SSE3 supported, but usually not faster
1665 ///< than regular MMX/SSE (e.g. Core1)
1666#define FF_MM_SSSE3 0x0080 ///< Conroe SSSE3 functions
1667#define FF_MM_SSE4 0x0100 ///< Penryn SSE4.1 functions
1668#define FF_MM_SSE42 0x0200 ///< Nehalem SSE4.2 functions
1669#define FF_MM_IWMMXT 0x0100 ///< XScale IWMMXT
1670#define FF_MM_ALTIVEC 0x0001 ///< standard AltiVec
1671
1672 /**
1673 * bits per sample/pixel from the demuxer (needed for huffyuv).
1674 * - encoding: Set by libavcodec.
1675 * - decoding: Set by user.
1676 */
1677 int bits_per_coded_sample;
1678
1679 /**
1680 * prediction method (needed for huffyuv)
1681 * - encoding: Set by user.
1682 * - decoding: unused
1683 */
1684 int prediction_method;
1685#define FF_PRED_LEFT 0
1686#define FF_PRED_PLANE 1
1687#define FF_PRED_MEDIAN 2
1688
1689 /**
1690 * sample aspect ratio (0 if unknown)
1691 * That is the width of a pixel divided by the height of the pixel.
1692 * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
1693 * - encoding: Set by user.
1694 * - decoding: Set by libavcodec.
1695 */
1696 //AVRational sample_aspect_ratio;
1697
1698 /**
1699 * the picture in the bitstream
1700 * - encoding: Set by libavcodec.
1701 * - decoding: Set by libavcodec.
1702 */
1703 AVFrame *coded_frame;
1704
1705 /**
1706 * debug
1707 * - encoding: Set by user.
1708 * - decoding: Set by user.
1709 */
1710 int debug;
1711#define FF_DEBUG_PICT_INFO 1
1712#define FF_DEBUG_RC 2
1713#define FF_DEBUG_BITSTREAM 4
1714#define FF_DEBUG_MB_TYPE 8
1715#define FF_DEBUG_QP 16
1716#define FF_DEBUG_MV 32
1717#define FF_DEBUG_DCT_COEFF 0x00000040
1718#define FF_DEBUG_SKIP 0x00000080
1719#define FF_DEBUG_STARTCODE 0x00000100
1720#define FF_DEBUG_PTS 0x00000200
1721#define FF_DEBUG_ER 0x00000400
1722#define FF_DEBUG_MMCO 0x00000800
1723#define FF_DEBUG_BUGS 0x00001000
1724#define FF_DEBUG_VIS_QP 0x00002000
1725#define FF_DEBUG_VIS_MB_TYPE 0x00004000
1726#define FF_DEBUG_BUFFERS 0x00008000
1727
1728 /**
1729 * debug
1730 * - encoding: Set by user.
1731 * - decoding: Set by user.
1732 */
1733 int debug_mv;
1734#define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1735#define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1736#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1737
1738 /**
1739 * error
1740 * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
1741 * - decoding: unused
1742 */
1743 uint64_t error[4];
1744
1745 /**
1746 * minimum MB quantizer
1747 * - encoding: unused
1748 * - decoding: unused
1749 */
1750 int mb_qmin;
1751
1752 /**
1753 * maximum MB quantizer
1754 * - encoding: unused
1755 * - decoding: unused
1756 */
1757 int mb_qmax;
1758
1759 /**
1760 * motion estimation comparison function
1761 * - encoding: Set by user.
1762 * - decoding: unused
1763 */
1764 int me_cmp;
1765 /**
1766 * subpixel motion estimation comparison function
1767 * - encoding: Set by user.
1768 * - decoding: unused
1769 */
1770 int me_sub_cmp;
1771 /**
1772 * macroblock comparison function (not supported yet)
1773 * - encoding: Set by user.
1774 * - decoding: unused
1775 */
1776 int mb_cmp;
1777 /**
1778 * interlaced DCT comparison function
1779 * - encoding: Set by user.
1780 * - decoding: unused
1781 */
1782 int ildct_cmp;
1783#define FF_CMP_SAD 0
1784#define FF_CMP_SSE 1
1785#define FF_CMP_SATD 2
1786#define FF_CMP_DCT 3
1787#define FF_CMP_PSNR 4
1788#define FF_CMP_BIT 5
1789#define FF_CMP_RD 6
1790#define FF_CMP_ZERO 7
1791#define FF_CMP_VSAD 8
1792#define FF_CMP_VSSE 9
1793#define FF_CMP_NSSE 10
1794#define FF_CMP_W53 11
1795#define FF_CMP_W97 12
1796#define FF_CMP_DCTMAX 13
1797#define FF_CMP_DCT264 14
1798#define FF_CMP_CHROMA 256
1799
1800 /**
1801 * ME diamond size & shape
1802 * - encoding: Set by user.
1803 * - decoding: unused
1804 */
1805 int dia_size;
1806
1807 /**
1808 * amount of previous MV predictors (2a+1 x 2a+1 square)
1809 * - encoding: Set by user.
1810 * - decoding: unused
1811 */
1812 int last_predictor_count;
1813
1814 /**
1815 * prepass for motion estimation
1816 * - encoding: Set by user.
1817 * - decoding: unused
1818 */
1819 int pre_me;
1820
1821 /**
1822 * motion estimation prepass comparison function
1823 * - encoding: Set by user.
1824 * - decoding: unused
1825 */
1826 int me_pre_cmp;
1827
1828 /**
1829 * ME prepass diamond size & shape
1830 * - encoding: Set by user.
1831 * - decoding: unused
1832 */
1833 int pre_dia_size;
1834
1835 /**
1836 * subpel ME quality
1837 * - encoding: Set by user.
1838 * - decoding: unused
1839 */
1840 int me_subpel_quality;
1841
1842 /**
1843 * callback to negotiate the pixelFormat
1844 * @param fmt is the list of formats which are supported by the codec,
1845 * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
1846 * The first is always the native one.
1847 * @return the chosen format
1848 * - encoding: unused
1849 * - decoding: Set by user, if not set the native format will be chosen.
1850 */
1851 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1852
1853 /**
1854 * DTG active format information (additional aspect ratio
1855 * information only used in DVB MPEG-2 transport streams)
1856 * 0 if not set.
1857 *
1858 * - encoding: unused
1859 * - decoding: Set by decoder.
1860 */
1861 int dtg_active_format;
1862#define FF_DTG_AFD_SAME 8
1863#define FF_DTG_AFD_4_3 9
1864#define FF_DTG_AFD_16_9 10
1865#define FF_DTG_AFD_14_9 11
1866#define FF_DTG_AFD_4_3_SP_14_9 13
1867#define FF_DTG_AFD_16_9_SP_14_9 14
1868#define FF_DTG_AFD_SP_4_3 15
1869
1870 /**
1871 * maximum motion estimation search range in subpel units
1872 * If 0 then no limit.
1873 *
1874 * - encoding: Set by user.
1875 * - decoding: unused
1876 */
1877 int me_range;
1878
1879 /**
1880 * intra quantizer bias
1881 * - encoding: Set by user.
1882 * - decoding: unused
1883 */
1884 int intra_quant_bias;
1885#define FF_DEFAULT_QUANT_BIAS 999999
1886
1887 /**
1888 * inter quantizer bias
1889 * - encoding: Set by user.
1890 * - decoding: unused
1891 */
1892 int inter_quant_bias;
1893
1894 /**
1895 * color table ID
1896 * - encoding: unused
1897 * - decoding: Which clrtable should be used for 8bit RGB images.
1898 * Tables have to be stored somewhere. FIXME
1899 */
1900 int color_table_id;
1901
1902 /**
1903 * internal_buffer count
1904 * Don't touch, used by libavcodec default_get_buffer().
1905 */
1906 int internal_buffer_count;
1907
1908 /**
1909 * internal_buffers
1910 * Don't touch, used by libavcodec default_get_buffer().
1911 */
1912 void *internal_buffer;
1913
1914#define FF_LAMBDA_SHIFT 7
1915#define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1916#define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1917#define FF_LAMBDA_MAX (256*128-1)
1918
1919#define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1920 /**
1921 * Global quality for codecs which cannot change it per frame.
1922 * This should be proportional to MPEG-1/2/4 qscale.
1923 * - encoding: Set by user.
1924 * - decoding: unused
1925 */
1926 int global_quality;
1927
1928#define FF_CODER_TYPE_VLC 0
1929#define FF_CODER_TYPE_AC 1
1930#define FF_CODER_TYPE_RAW 2
1931#define FF_CODER_TYPE_RLE 3
1932#define FF_CODER_TYPE_DEFLATE 4
1933 /**
1934 * coder type
1935 * - encoding: Set by user.
1936 * - decoding: unused
1937 */
1938 int coder_type;
1939
1940 /**
1941 * context model
1942 * - encoding: Set by user.
1943 * - decoding: unused
1944 */
1945 int context_model;
1946#if 0
1947 /**
1948 *
1949 * - encoding: unused
1950 * - decoding: Set by user.
1951 */
1952 uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1953#endif
1954
1955 /**
1956 * slice flags
1957 * - encoding: unused
1958 * - decoding: Set by user.
1959 */
1960 int slice_flags;
1961#define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1962#define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1963#define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1964
1965 /**
1966 * XVideo Motion Acceleration
1967 * - encoding: forbidden
1968 * - decoding: set by decoder
1969 */
1970 int xvmc_acceleration;
1971
1972 /**
1973 * macroblock decision mode
1974 * - encoding: Set by user.
1975 * - decoding: unused
1976 */
1977 int mb_decision;
1978#define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1979#define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1980#define FF_MB_DECISION_RD 2 ///< rate distortion
1981
1982 /**
1983 * custom intra quantization matrix
1984 * - encoding: Set by user, can be NULL.
1985 * - decoding: Set by libavcodec.
1986 */
1987 uint16_t *intra_matrix;
1988
1989 /**
1990 * custom inter quantization matrix
1991 * - encoding: Set by user, can be NULL.
1992 * - decoding: Set by libavcodec.
1993 */
1994 uint16_t *inter_matrix;
1995
1996 /**
1997 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1998 * This is used to work around some encoder bugs.
1999 * - encoding: unused
2000 * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
2001 */
2002 unsigned int stream_codec_tag;
2003
2004 /**
2005 * scene change detection threshold
2006 * 0 is default, larger means fewer detected scene changes.
2007 * - encoding: Set by user.
2008 * - decoding: unused
2009 */
2010 int scenechange_threshold;
2011
2012 /**
2013 * minimum Lagrange multipler
2014 * - encoding: Set by user.
2015 * - decoding: unused
2016 */
2017 int lmin;
2018
2019 /**
2020 * maximum Lagrange multipler
2021 * - encoding: Set by user.
2022 * - decoding: unused
2023 */
2024 int lmax;
2025
2026 /**
2027 * palette control structure
2028 * - encoding: ??? (no palette-enabled encoder yet)
2029 * - decoding: Set by user.
2030 */
2031 struct AVPaletteControl *palctrl;
2032
2033 /**
2034 * noise reduction strength
2035 * - encoding: Set by user.
2036 * - decoding: unused
2037 */
2038 int noise_reduction;
2039
2040 /**
2041 * Called at the beginning of a frame to get cr buffer for it.
2042 * Buffer type (size, hints) must be the same. libavcodec won't check it.
2043 * libavcodec will pass previous buffer in pic, function should return
2044 * same buffer or new buffer with old frame "painted" into it.
2045 * If pic.data[0] == NULL must behave like get_buffer().
2046 * if CODEC_CAP_DR1 is not set then reget_buffer() must call
2047 * avcodec_default_reget_buffer() instead of providing buffers allocated by
2048 * some other means.
2049 * - encoding: unused
2050 * - decoding: Set by libavcodec, user can override.
2051 */
2052 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
2053
2054 /**
2055 * Number of bits which should be loaded into the rc buffer before decoding starts.
2056 * - encoding: Set by user.
2057 * - decoding: unused
2058 */
2059 int rc_initial_buffer_occupancy;
2060
2061 /**
2062 *
2063 * - encoding: Set by user.
2064 * - decoding: unused
2065 */
2066 int inter_threshold;
2067
2068 /**
2069 * CODEC_FLAG2_*
2070 * - encoding: Set by user.
2071 * - decoding: Set by user.
2072 */
2073 int flags2;
2074
2075 /**
2076 * Simulates errors in the bitstream to test error concealment.
2077 * - encoding: Set by user.
2078 * - decoding: unused
2079 */
2080 int error_rate;
2081
2082 /**
2083 * MP3 antialias algorithm, see FF_AA_* below.
2084 * - encoding: unused
2085 * - decoding: Set by user.
2086 */
2087 int antialias_algo;
2088#define FF_AA_AUTO 0
2089#define FF_AA_FASTINT 1 //not implemented yet
2090#define FF_AA_INT 2
2091#define FF_AA_FLOAT 3
2092 /**
2093 * quantizer noise shaping
2094 * - encoding: Set by user.
2095 * - decoding: unused
2096 */
2097 int quantizer_noise_shaping;
2098
2099 /**
2100 * thread count
2101 * is used to decide how many independent tasks should be passed to execute()
2102 * - encoding: Set by user.
2103 * - decoding: Set by user.
2104 */
2105 int thread_count;
2106
2107 /**
2108 * The codec may call this to execute several independent things.
2109 * It will return only after finishing all tasks.
2110 * The user may replace this with some multithreaded implementation,
2111 * the default implementation will execute the parts serially.
2112 * @param count the number of things to execute
2113 * - encoding: Set by libavcodec, user can override.
2114 * - decoding: Set by libavcodec, user can override.
2115 */
2116 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size);
2117
2118 /**
2119 * thread opaque
2120 * Can be used by execute() to store some per AVCodecContext stuff.
2121 * - encoding: set by execute()
2122 * - decoding: set by execute()
2123 */
2124 void *thread_opaque;
2125
2126 /**
2127 * Motion estimation threshold below which no motion estimation is
2128 * performed, but instead the user specified motion vectors are used.
2129 *
2130 * - encoding: Set by user.
2131 * - decoding: unused
2132 */
2133 int me_threshold;
2134
2135 /**
2136 * Macroblock threshold below which the user specified macroblock types will be used.
2137 * - encoding: Set by user.
2138 * - decoding: unused
2139 */
2140 int mb_threshold;
2141
2142 /**
2143 * precision of the intra DC coefficient - 8
2144 * - encoding: Set by user.
2145 * - decoding: unused
2146 */
2147 int intra_dc_precision;
2148
2149 /**
2150 * noise vs. sse weight for the nsse comparsion function
2151 * - encoding: Set by user.
2152 * - decoding: unused
2153 */
2154 int nsse_weight;
2155
2156 /**
2157 * Number of macroblock rows at the top which are skipped.
2158 * - encoding: unused
2159 * - decoding: Set by user.
2160 */
2161 int skip_top;
2162
2163 /**
2164 * Number of macroblock rows at the bottom which are skipped.
2165 * - encoding: unused
2166 * - decoding: Set by user.
2167 */
2168 int skip_bottom;
2169
2170 /**
2171 * profile
2172 * - encoding: Set by user.
2173 * - decoding: Set by libavcodec.
2174 */
2175 int profile;
2176#define FF_PROFILE_UNKNOWN -99
2177
2178#define FF_PROFILE_AAC_MAIN 0
2179#define FF_PROFILE_AAC_LOW 1
2180#define FF_PROFILE_AAC_SSR 2
2181#define FF_PROFILE_AAC_LTP 3
2182
2183#define FF_PROFILE_H264_BASELINE 66
2184#define FF_PROFILE_H264_MAIN 77
2185#define FF_PROFILE_H264_EXTENDED 88
2186#define FF_PROFILE_H264_HIGH 100
2187#define FF_PROFILE_H264_HIGH_10 110
2188#define FF_PROFILE_H264_HIGH_422 122
2189#define FF_PROFILE_H264_HIGH_444 244
2190#define FF_PROFILE_H264_CAVLC_444 44
2191
2192 /**
2193 * level
2194 * - encoding: Set by user.
2195 * - decoding: Set by libavcodec.
2196 */
2197 int level;
2198#define FF_LEVEL_UNKNOWN -99
2199
2200 /**
2201 * low resolution decoding, 1-> 1/2 size, 2->1/4 size
2202 * - encoding: unused
2203 * - decoding: Set by user.
2204 */
2205 int lowres;
2206
2207 /**
2208 * Bitstream width / height, may be different from width/height if lowres
2209 * or other things are used.
2210 * - encoding: unused
2211 * - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
2212 */
2213 int coded_width, coded_height;
2214
2215 /**
2216 * frame skip threshold
2217 * - encoding: Set by user.
2218 * - decoding: unused
2219 */
2220 int frame_skip_threshold;
2221
2222 /**
2223 * frame skip factor
2224 * - encoding: Set by user.
2225 * - decoding: unused
2226 */
2227 int frame_skip_factor;
2228
2229 /**
2230 * frame skip exponent
2231 * - encoding: Set by user.
2232 * - decoding: unused
2233 */
2234 int frame_skip_exp;
2235
2236 /**
2237 * frame skip comparison function
2238 * - encoding: Set by user.
2239 * - decoding: unused
2240 */
2241 int frame_skip_cmp;
2242
2243 /**
2244 * Border processing masking, raises the quantizer for mbs on the borders
2245 * of the picture.
2246 * - encoding: Set by user.
2247 * - decoding: unused
2248 */
2249 float border_masking;
2250
2251 /**
2252 * minimum MB lagrange multipler
2253 * - encoding: Set by user.
2254 * - decoding: unused
2255 */
2256 int mb_lmin;
2257
2258 /**
2259 * maximum MB lagrange multipler
2260 * - encoding: Set by user.
2261 * - decoding: unused
2262 */
2263 int mb_lmax;
2264
2265 /**
2266 *
2267 * - encoding: Set by user.
2268 * - decoding: unused
2269 */
2270 int me_penalty_compensation;
2271
2272 /**
2273 *
2274 * - encoding: unused
2275 * - decoding: Set by user.
2276 */
2277 enum AVDiscard skip_loop_filter;
2278
2279 /**
2280 *
2281 * - encoding: unused
2282 * - decoding: Set by user.
2283 */
2284 enum AVDiscard skip_idct;
2285
2286 /**
2287 *
2288 * - encoding: unused
2289 * - decoding: Set by user.
2290 */
2291 enum AVDiscard skip_frame;
2292
2293 /**
2294 *
2295 * - encoding: Set by user.
2296 * - decoding: unused
2297 */
2298 int bidir_refine;
2299
2300 /**
2301 *
2302 * - encoding: Set by user.
2303 * - decoding: unused
2304 */
2305 int brd_scale;
2306
2307 /**
2308 * constant rate factor - quality-based VBR - values ~correspond to qps
2309 * - encoding: Set by user.
2310 * - decoding: unused
2311 */
2312 float crf;
2313
2314 /**
2315 * constant quantization parameter rate control method
2316 * - encoding: Set by user.
2317 * - decoding: unused
2318 */
2319 int cqp;
2320
2321 /**
2322 * minimum GOP size
2323 * - encoding: Set by user.
2324 * - decoding: unused
2325 */
2326 int keyint_min;
2327
2328 /**
2329 * number of reference frames
2330 * - encoding: Set by user.
2331 * - decoding: Set by lavc.
2332 */
2333 int refs;
2334
2335 /**
2336 * chroma qp offset from luma
2337 * - encoding: Set by user.
2338 * - decoding: unused
2339 */
2340 int chromaoffset;
2341
2342 /**
2343 * Influences how often B-frames are used.
2344 * - encoding: Set by user.
2345 * - decoding: unused
2346 */
2347 int bframebias;
2348
2349 /**
2350 * trellis RD quantization
2351 * - encoding: Set by user.
2352 * - decoding: unused
2353 */
2354 int trellis;
2355
2356 /**
2357 * Reduce fluctuations in qp (before curve compression).
2358 * - encoding: Set by user.
2359 * - decoding: unused
2360 */
2361 float complexityblur;
2362
2363 /**
2364 * in-loop deblocking filter alphac0 parameter
2365 * alpha is in the range -6...6
2366 * - encoding: Set by user.
2367 * - decoding: unused
2368 */
2369 int deblockalpha;
2370
2371 /**
2372 * in-loop deblocking filter beta parameter
2373 * beta is in the range -6...6
2374 * - encoding: Set by user.
2375 * - decoding: unused
2376 */
2377 int deblockbeta;
2378
2379 /**
2380 * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
2381 * - encoding: Set by user.
2382 * - decoding: unused
2383 */
2384 int partitions;
2385#define X264_PART_I4X4 0x001 /* Analyze i4x4 */
2386#define X264_PART_I8X8 0x002 /* Analyze i8x8 (requires 8x8 transform) */
2387#define X264_PART_P8X8 0x010 /* Analyze p16x8, p8x16 and p8x8 */
2388#define X264_PART_P4X4 0x020 /* Analyze p8x4, p4x8, p4x4 */
2389#define X264_PART_B8X8 0x100 /* Analyze b16x8, b8x16 and b8x8 */
2390
2391 /**
2392 * direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal), 3 (auto)
2393 * - encoding: Set by user.
2394 * - decoding: unused
2395 */
2396 int directpred;
2397
2398 /**
2399 * Audio cutoff bandwidth (0 means "automatic")
2400 * - encoding: Set by user.
2401 * - decoding: unused
2402 */
2403 int cutoff;
2404
2405 /**
2406 * Multiplied by qscale for each frame and added to scene_change_score.
2407 * - encoding: Set by user.
2408 * - decoding: unused
2409 */
2410 int scenechange_factor;
2411
2412 /**
2413 *
2414 * Note: Value depends upon the compare function used for fullpel ME.
2415 * - encoding: Set by user.
2416 * - decoding: unused
2417 */
2418 int mv0_threshold;
2419
2420 /**
2421 * Adjusts sensitivity of b_frame_strategy 1.
2422 * - encoding: Set by user.
2423 * - decoding: unused
2424 */
2425 int b_sensitivity;
2426
2427 /**
2428 * - encoding: Set by user.
2429 * - decoding: unused
2430 */
2431 int compression_level;
2432#define FF_COMPRESSION_DEFAULT -1
2433
2434#if LIBAVCODEC_VERSION_MAJOR < 53
2435 /**
2436 * Sets whether to use LPC mode - used by FLAC encoder.
2437 * - encoding: Set by user.
2438 * - decoding: unused
2439 * @deprecated Deprecated in favor of lpc_type and lpc_passes.
2440 */
2441 int use_lpc;
2442#endif
2443
2444 /**
2445 * LPC coefficient precision - used by FLAC encoder
2446 * - encoding: Set by user.
2447 * - decoding: unused
2448 */
2449 int lpc_coeff_precision;
2450
2451 /**
2452 * - encoding: Set by user.
2453 * - decoding: unused
2454 */
2455 int min_prediction_order;
2456
2457 /**
2458 * - encoding: Set by user.
2459 * - decoding: unused
2460 */
2461 int max_prediction_order;
2462
2463 /**
2464 * search method for selecting prediction order
2465 * - encoding: Set by user.
2466 * - decoding: unused
2467 */
2468 int prediction_order_method;
2469
2470 /**
2471 * - encoding: Set by user.
2472 * - decoding: unused
2473 */
2474 int min_partition_order;
2475
2476 /**
2477 * - encoding: Set by user.
2478 * - decoding: unused
2479 */
2480 int max_partition_order;
2481
2482 /**
2483 * GOP timecode frame start number, in non drop frame format
2484 * - encoding: Set by user.
2485 * - decoding: unused
2486 */
2487 int64_t timecode_frame_start;
2488
2489#if LIBAVCODEC_VERSION_MAJOR < 53
2490 /**
2491 * Decoder should decode to this many channels if it can (0 for default)
2492 * - encoding: unused
2493 * - decoding: Set by user.
2494 * @deprecated Deprecated in favor of request_channel_layout.
2495 */
2496 int request_channels;
2497#endif
2498
2499 /**
2500 * Percentage of dynamic range compression to be applied by the decoder.
2501 * The default value is 1.0, corresponding to full compression.
2502 * - encoding: unused
2503 * - decoding: Set by user.
2504 */
2505 float drc_scale;
2506
2507 /**
2508 * opaque 64bit number (generally a PTS) that will be reordered and
2509 * output in AVFrame.reordered_opaque
2510 * - encoding: unused
2511 * - decoding: Set by user.
2512 */
2513 int64_t reordered_opaque;
2514
2515 /**
2516 * Bits per sample/pixel of internal libavcodec pixel/sample format.
2517 * This field is applicable only when sample_fmt is SAMPLE_FMT_S32.
2518 * - encoding: set by user.
2519 * - decoding: set by libavcodec.
2520 */
2521 int bits_per_raw_sample;
2522
2523 /**
2524 * Audio channel layout.
2525 * - encoding: set by user.
2526 * - decoding: set by libavcodec.
2527 */
2528 int64_t channel_layout;
2529
2530 /**
2531 * Request decoder to use this channel layout if it can (0 for default)
2532 * - encoding: unused
2533 * - decoding: Set by user.
2534 */
2535 int64_t request_channel_layout;
2536
2537 /**
2538 * Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow.
2539 * - encoding: Set by user.
2540 * - decoding: unused.
2541 */
2542 float rc_max_available_vbv_use;
2543
2544 /**
2545 * Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow.
2546 * - encoding: Set by user.
2547 * - decoding: unused.
2548 */
2549 float rc_min_vbv_overflow_use;
2550
2551 /**
2552 * Hardware accelerator in use
2553 * - encoding: unused.
2554 * - decoding: Set by libavcodec
2555 */
2556 struct AVHWAccel *hwaccel;
2557
2558 /**
2559 * For some codecs, the time base is closer to the field rate than the frame rate.
2560 * Most notably, H.264 and MPEG-2 specify time_base as half of frame duration
2561 * if no telecine is used ...
2562 *
2563 * Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2.
2564 */
2565 int ticks_per_frame;
2566
2567 /**
2568 * Hardware accelerator context.
2569 * For some hardware accelerators, a global context needs to be
2570 * provided by the user. In that case, this holds display-dependent
2571 * data FFmpeg cannot instantiate itself. Please refer to the
2572 * FFmpeg HW accelerator documentation to know how to fill this
2573 * is. e.g. for VA API, this is a struct vaapi_context.
2574 * - encoding: unused
2575 * - decoding: Set by user
2576 */
2577 void *hwaccel_context;
2578
2579 /**
2580 * Chromaticity coordinates of the source primaries.
2581 * - encoding: Set by user
2582 * - decoding: Set by libavcodec
2583 */
2584 enum AVColorPrimaries color_primaries;
2585
2586 /**
2587 * Color Transfer Characteristic.
2588 * - encoding: Set by user
2589 * - decoding: Set by libavcodec
2590 */
2591 enum AVColorTransferCharacteristic color_trc;
2592
2593 /**
2594 * YUV colorspace type.
2595 * - encoding: Set by user
2596 * - decoding: Set by libavcodec
2597 */
2598 enum AVColorSpace colorspace;
2599
2600 /**
2601 * MPEG vs JPEG YUV range.
2602 * - encoding: Set by user
2603 * - decoding: Set by libavcodec
2604 */
2605 enum AVColorRange color_range;
2606
2607 /**
2608 * This defines the location of chroma samples.
2609 * - encoding: Set by user
2610 * - decoding: Set by libavcodec
2611 */
2612 enum AVChromaLocation chroma_sample_location;
2613
2614 /**
2615 * The codec may call this to execute several independent things.
2616 * It will return only after finishing all tasks.
2617 * The user may replace this with some multithreaded implementation,
2618 * the default implementation will execute the parts serially.
2619 * Also see avcodec_thread_init and e.g. the --enable-pthread configure option.
2620 * @param c context passed also to func
2621 * @param count the number of things to execute
2622 * @param arg2 argument passed unchanged to func
2623 * @param ret return values of executed functions, must have space for "count" values. May be NULL.
2624 * @param func function that will be called count times, with jobnr from 0 to count-1.
2625 * threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no
2626 * two instances of func executing at the same time will have the same threadnr.
2627 * @return always 0 currently, but code should handle a future improvement where when any call to func
2628 * returns < 0 no further calls to func may be done and < 0 is returned.
2629 * - encoding: Set by libavcodec, user can override.
2630 * - decoding: Set by libavcodec, user can override.
2631 */
2632 int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count);
2633
2634 /**
2635 * explicit P-frame weighted prediction analysis method
2636 * 0: off
2637 * 1: fast blind weighting (one reference duplicate with -1 offset)
2638 * 2: smart weighting (full fade detection analysis)
2639 * - encoding: Set by user.
2640 * - decoding: unused
2641 */
2642 int weighted_p_pred;
2643
2644 /**
2645 * AQ mode
2646 * 0: Disabled
2647 * 1: Variance AQ (complexity mask)
2648 * 2: Auto-variance AQ (experimental)
2649 * - encoding: Set by user
2650 * - decoding: unused
2651 */
2652 int aq_mode;
2653
2654 /**
2655 * AQ strength
2656 * Reduces blocking and blurring in flat and textured areas.
2657 * - encoding: Set by user
2658 * - decoding: unused
2659 */
2660 float aq_strength;
2661
2662 /**
2663 * PSY RD
2664 * Strength of psychovisual optimization
2665 * - encoding: Set by user
2666 * - decoding: unused
2667 */
2668 float psy_rd;
2669
2670 /**
2671 * PSY trellis
2672 * Strength of psychovisual optimization
2673 * - encoding: Set by user
2674 * - decoding: unused
2675 */
2676 float psy_trellis;
2677
2678 /**
2679 * RC lookahead
2680 * Number of frames for frametype and ratecontrol lookahead
2681 * - encoding: Set by user
2682 * - decoding: unused
2683 */
2684 int rc_lookahead;
2685
2686 /**
2687 * Constant rate factor maximum
2688 * With CRF encoding mode and VBV restrictions enabled, prevents quality from being worse
2689 * than crf_max, even if doing so would violate VBV restrictions.
2690 * - encoding: Set by user.
2691 * - decoding: unused
2692 */
2693 float crf_max;
2694
2695 int log_level_offset;
2696
2697 /**
2698 * Determines which LPC analysis algorithm to use.
2699 * - encoding: Set by user
2700 * - decoding: unused
2701 */
2702 enum AVLPCType lpc_type;
2703
2704 /**
2705 * Number of passes to use for Cholesky factorization during LPC analysis
2706 * - encoding: Set by user
2707 * - decoding: unused
2708 */
2709 int lpc_passes;
2710} AVCodecContext;
2711
2712/**
2713 * AVCodec.
2714 */
2715typedef struct AVCodec {
2716 /**
2717 * Name of the codec implementation.
2718 * The name is globally unique among encoders and among decoders (but an
2719 * encoder and a decoder can share the same name).
2720 * This is the primary way to find a codec from the user perspective.
2721 */
2722 const char *name;
2723 enum AVMediaType type;
2724 enum CodecID id;
2725 int priv_data_size;
2726 int (*init)(AVCodecContext *);
2727 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2728 int (*close)(AVCodecContext *);
2729 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt);
2730 /**
2731 * Codec capabilities.
2732 * see CODEC_CAP_*
2733 */
2734 int capabilities;
2735 struct AVCodec *next;
2736 /**
2737 * Flush buffers.
2738 * Will be called when seeking
2739 */
2740 void (*flush)(AVCodecContext *);
2741 //const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0}
2742 //const enum PixelFormat *pix_fmts; ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1
2743 /**
2744 * Descriptive name for the codec, meant to be more human readable than name.
2745 * You should use the NULL_IF_CONFIG_SMALL() macro to define it.
2746 */
2747 const char *long_name;
2748 const int *supported_samplerates; ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
2749 const enum SampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1
2750 const int64_t *channel_layouts; ///< array of support channel layouts, or NULL if unknown. array is terminated by 0
2751 uint8_t max_lowres; ///< maximum value for lowres supported by the decoder
2752} AVCodec;
2753
2754/**
2755 * AVHWAccel.
2756 */
2757typedef struct AVHWAccel {
2758 /**
2759 * Name of the hardware accelerated codec.
2760 * The name is globally unique among encoders and among decoders (but an
2761 * encoder and a decoder can share the same name).
2762 */
2763 const char *name;
2764
2765 /**
2766 * Type of codec implemented by the hardware accelerator.
2767 *
2768 * See AVMEDIA_TYPE_xxx
2769 */
2770 enum AVMediaType type;
2771
2772 /**
2773 * Codec implemented by the hardware accelerator.
2774 *
2775 * See CODEC_ID_xxx
2776 */
2777 enum CodecID id;
2778
2779 /**
2780 * Supported pixel format.
2781 *
2782 * Only hardware accelerated formats are supported here.
2783 */
2784 //enum PixelFormat pix_fmt;
2785
2786 /**
2787 * Hardware accelerated codec capabilities.
2788 * see FF_HWACCEL_CODEC_CAP_*
2789 */
2790 int capabilities;
2791
2792 struct AVHWAccel *next;
2793
2794 /**
2795 * Called at the beginning of each frame or field picture.
2796 *
2797 * Meaningful frame information (codec specific) is guaranteed to
2798 * be parsed at this point. This function is mandatory.
2799 *
2800 * Note that buf can be NULL along with buf_size set to 0.
2801 * Otherwise, this means the whole frame is available at this point.
2802 *
2803 * @param avctx the codec context
2804 * @param buf the frame data buffer base
2805 * @param buf_size the size of the frame in bytes
2806 * @return zero if successful, a negative value otherwise
2807 */
2808 int (*start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
2809
2810 /**
2811 * Callback for each slice.
2812 *
2813 * Meaningful slice information (codec specific) is guaranteed to
2814 * be parsed at this point. This function is mandatory.
2815 *
2816 * @param avctx the codec context
2817 * @param buf the slice data buffer base
2818 * @param buf_size the size of the slice in bytes
2819 * @return zero if successful, a negative value otherwise
2820 */
2821 int (*decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
2822
2823 /**
2824 * Called at the end of each frame or field picture.
2825 *
2826 * The whole picture is parsed at this point and can now be sent
2827 * to the hardware accelerator. This function is mandatory.
2828 *
2829 * @param avctx the codec context
2830 * @return zero if successful, a negative value otherwise
2831 */
2832 int (*end_frame)(AVCodecContext *avctx);
2833
2834 /**
2835 * Size of HW accelerator private data.
2836 *
2837 * Private data is allocated with av_mallocz() before
2838 * AVCodecContext.get_buffer() and deallocated after
2839 * AVCodecContext.release_buffer().
2840 */
2841 int priv_data_size;
2842} AVHWAccel;
2843
2844/**
2845 * four components are given, that's all.
2846 * the last component is alpha
2847 */
2848typedef struct AVPicture {
2849 uint8_t *data[4];
2850 int linesize[4]; ///< number of bytes per line
2851} AVPicture;
2852
2853#if LIBAVCODEC_VERSION_MAJOR < 53
2854/**
2855 * AVPaletteControl
2856 * This structure defines a method for communicating palette changes
2857 * between and demuxer and a decoder.
2858 *
2859 * @deprecated Use AVPacket to send palette changes instead.
2860 * This is totally broken.
2861 */
2862#define AVPALETTE_SIZE 1024
2863#define AVPALETTE_COUNT 256
2864typedef struct AVPaletteControl {
2865
2866 /* Demuxer sets this to 1 to indicate the palette has changed;
2867 * decoder resets to 0. */
2868 int palette_changed;
2869
2870 /* 4-byte ARGB palette entries, stored in native byte order; note that
2871 * the individual palette components should be on a 8-bit scale; if
2872 * the palette data comes from an IBM VGA native format, the component
2873 * data is probably 6 bits in size and needs to be scaled. */
2874 unsigned int palette[AVPALETTE_COUNT];
2875
2876} AVPaletteControl attribute_deprecated;
2877#endif
2878
2879enum AVSubtitleType {
2880 SUBTITLE_NONE,
2881
2882 SUBTITLE_BITMAP, ///< A bitmap, pict will be set
2883
2884 /**
2885 * Plain text, the text field must be set by the decoder and is
2886 * authoritative. ass and pict fields may contain approximations.
2887 */
2888 SUBTITLE_TEXT,
2889
2890 /**
2891 * Formatted text, the ass field must be set by the decoder and is
2892 * authoritative. pict and text fields may contain approximations.
2893 */
2894 SUBTITLE_ASS,
2895};
2896
2897typedef struct AVSubtitleRect {
2898 int x; ///< top left corner of pict, undefined when pict is not set
2899 int y; ///< top left corner of pict, undefined when pict is not set
2900 int w; ///< width of pict, undefined when pict is not set
2901 int h; ///< height of pict, undefined when pict is not set
2902 int nb_colors; ///< number of colors in pict, undefined when pict is not set
2903
2904 /**
2905 * data+linesize for the bitmap of this subtitle.
2906 * can be set for text/ass as well once they where rendered
2907 */
2908 AVPicture pict;
2909 enum AVSubtitleType type;
2910
2911 char *text; ///< 0 terminated plain UTF-8 text
2912
2913 /**
2914 * 0 terminated ASS/SSA compatible event line.
2915 * The pressentation of this is unaffected by the other values in this
2916 * struct.
2917 */
2918 char *ass;
2919} AVSubtitleRect;
2920
2921typedef struct AVSubtitle {
2922 uint16_t format; /* 0 = graphics */
2923 uint32_t start_display_time; /* relative to packet pts, in ms */
2924 uint32_t end_display_time; /* relative to packet pts, in ms */
2925 unsigned num_rects;
2926 AVSubtitleRect **rects;
2927 int64_t pts; ///< Same as packet pts, in AV_TIME_BASE
2928} AVSubtitle;
2929
2930/* packet functions */
2931
2932/**
2933 * @deprecated use NULL instead
2934 */
2935attribute_deprecated void av_destruct_packet_nofree(AVPacket *pkt);
2936
2937/**
2938 * Default packet destructor.
2939 */
2940void av_destruct_packet(AVPacket *pkt);
2941
2942/**
2943 * Initialize optional fields of a packet with default values.
2944 *
2945 * @param pkt packet
2946 */
2947void av_init_packet(AVPacket *pkt);
2948
2949/**
2950 * Allocate the payload of a packet and initialize its fields with
2951 * default values.
2952 *
2953 * @param pkt packet
2954 * @param size wanted payload size
2955 * @return 0 if OK, AVERROR_xxx otherwise
2956 */
2957int av_new_packet(AVPacket *pkt, int size);
2958
2959/**
2960 * Reduce packet size, correctly zeroing padding
2961 *
2962 * @param pkt packet
2963 * @param size new size
2964 */
2965void av_shrink_packet(AVPacket *pkt, int size);
2966
2967/**
2968 * @warning This is a hack - the packet memory allocation stuff is broken. The
2969 * packet is allocated if it was not really allocated.
2970 */
2971int av_dup_packet(AVPacket *pkt);
2972
2973/**
2974 * Free a packet.
2975 *
2976 * @param pkt packet to free
2977 */
2978void av_free_packet(AVPacket *pkt);
2979
2980/* resample.c */
2981
2982struct ReSampleContext;
2983struct AVResampleContext;
2984
2985typedef struct ReSampleContext ReSampleContext;
2986
2987#if LIBAVCODEC_VERSION_MAJOR < 53
2988/**
2989 * @deprecated Use av_audio_resample_init() instead.
2990 */
2991attribute_deprecated ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2992 int output_rate, int input_rate);
2993#endif
2994/**
2995 * Initialize audio resampling context
2996 *
2997 * @param output_channels number of output channels
2998 * @param input_channels number of input channels
2999 * @param output_rate output sample rate
3000 * @param input_rate input sample rate
3001 * @param sample_fmt_out requested output sample format
3002 * @param sample_fmt_in input sample format
3003 * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
3004 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
3005 * @param linear If 1 then the used FIR filter will be linearly interpolated
3006 between the 2 closest, if 0 the closest will be used
3007 * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
3008 * @return allocated ReSampleContext, NULL if error occured
3009 */
3010ReSampleContext *av_audio_resample_init(int output_channels, int input_channels,
3011 int output_rate, int input_rate,
3012 enum SampleFormat sample_fmt_out,
3013 enum SampleFormat sample_fmt_in,
3014 int filter_length, int log2_phase_count,
3015 int linear, double cutoff);
3016
3017int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
3018void audio_resample_close(ReSampleContext *s);
3019
3020
3021/**
3022 * Initialize an audio resampler.
3023 * Note, if either rate is not an integer then simply scale both rates up so they are.
3024 * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
3025 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
3026 * @param linear If 1 then the used FIR filter will be linearly interpolated
3027 between the 2 closest, if 0 the closest will be used
3028 * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
3029 */
3030struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
3031
3032/**
3033 * Resample an array of samples using a previously configured context.
3034 * @param src an array of unconsumed samples
3035 * @param consumed the number of samples of src which have been consumed are returned here
3036 * @param src_size the number of unconsumed samples available
3037 * @param dst_size the amount of space in samples available in dst
3038 * @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.
3039 * @return the number of samples written in dst or -1 if an error occurred
3040 */
3041int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
3042
3043
3044/**
3045 * Compensate samplerate/timestamp drift. The compensation is done by changing
3046 * the resampler parameters, so no audible clicks or similar distortions occur
3047 * @param compensation_distance distance in output samples over which the compensation should be performed
3048 * @param sample_delta number of output samples which should be output less
3049 *
3050 * example: av_resample_compensate(c, 10, 500)
3051 * here instead of 510 samples only 500 samples would be output
3052 *
3053 * note, due to rounding the actual compensation might be slightly different,
3054 * especially if the compensation_distance is large and the in_rate used during init is small
3055 */
3056void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
3057void av_resample_close(struct AVResampleContext *c);
3058
3059/**
3060 * Allocate memory for a picture. Call avpicture_free to free it.
3061 *
3062 * @param picture the picture to be filled in
3063 * @param pix_fmt the format of the picture
3064 * @param width the width of the picture
3065 * @param height the height of the picture
3066 * @return zero if successful, a negative value if not
3067 */
3068int avpicture_alloc(AVPicture *picture, enum PixelFormat pix_fmt, int width, int height);
3069
3070/**
3071 * Free a picture previously allocated by avpicture_alloc().
3072 *
3073 * @param picture the AVPicture to be freed
3074 */
3075void avpicture_free(AVPicture *picture);
3076
3077/**
3078 * Fill in the AVPicture fields.
3079 * The fields of the given AVPicture are filled in by using the 'ptr' address
3080 * which points to the image data buffer. Depending on the specified picture
3081 * format, one or multiple image data pointers and line sizes will be set.
3082 * If a planar format is specified, several pointers will be set pointing to
3083 * the different picture planes and the line sizes of the different planes
3084 * will be stored in the lines_sizes array.
3085 * Call with ptr == NULL to get the required size for the ptr buffer.
3086 *
3087 * @param picture AVPicture whose fields are to be filled in
3088 * @param ptr Buffer which will contain or contains the actual image data
3089 * @param pix_fmt The format in which the picture data is stored.
3090 * @param width the width of the image in pixels
3091 * @param height the height of the image in pixels
3092 * @return size of the image data in bytes
3093 */
3094int avpicture_fill(AVPicture *picture, uint8_t *ptr,
3095 enum PixelFormat pix_fmt, int width, int height);
3096int avpicture_layout(const AVPicture* src, enum PixelFormat pix_fmt, int width, int height,
3097 unsigned char *dest, int dest_size);
3098
3099/**
3100 * Calculate the size in bytes that a picture of the given width and height
3101 * would occupy if stored in the given picture format.
3102 * Note that this returns the size of a compact representation as generated
3103 * by avpicture_layout, which can be smaller than the size required for e.g.
3104 * avpicture_fill.
3105 *
3106 * @param pix_fmt the given picture format
3107 * @param width the width of the image
3108 * @param height the height of the image
3109 * @return Image data size in bytes or -1 on error (e.g. too large dimensions).
3110 */
3111int avpicture_get_size(enum PixelFormat pix_fmt, int width, int height);
3112void avcodec_get_chroma_sub_sample(enum PixelFormat pix_fmt, int *h_shift, int *v_shift);
3113const char *avcodec_get_pix_fmt_name(enum PixelFormat pix_fmt);
3114void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
3115
3116#if LIBAVCODEC_VERSION_MAJOR < 53
3117/**
3118 * Return the pixel format corresponding to the name name.
3119 *
3120 * If there is no pixel format with name name, then look for a
3121 * pixel format with the name corresponding to the native endian
3122 * format of name.
3123 * For example in a little-endian system, first look for "gray16",
3124 * then for "gray16le".
3125 *
3126 * Finally if no pixel format has been found, return PIX_FMT_NONE.
3127 *
3128 * @deprecated Deprecated in favor of av_get_pix_fmt().
3129 */
3130attribute_deprecated enum PixelFormat avcodec_get_pix_fmt(const char* name);
3131#endif
3132
3133/**
3134 * Return a value representing the fourCC code associated to the
3135 * pixel format pix_fmt, or 0 if no associated fourCC code can be
3136 * found.
3137 */
3138unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat pix_fmt);
3139
3140/**
3141 * Put a string representing the codec tag codec_tag in buf.
3142 *
3143 * @param buf_size size in bytes of buf
3144 * @return the length of the string that would have been generated if
3145 * enough space had been available, excluding the trailing null
3146 */
3147size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag);
3148
3149#define FF_LOSS_RESOLUTION 0x0001 /**< loss due to resolution change */
3150#define FF_LOSS_DEPTH 0x0002 /**< loss due to color depth change */
3151#define FF_LOSS_COLORSPACE 0x0004 /**< loss due to color space conversion */
3152#define FF_LOSS_ALPHA 0x0008 /**< loss of alpha bits */
3153#define FF_LOSS_COLORQUANT 0x0010 /**< loss due to color quantization */
3154#define FF_LOSS_CHROMA 0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
3155
3156/**
3157 * Compute what kind of losses will occur when converting from one specific
3158 * pixel format to another.
3159 * When converting from one pixel format to another, information loss may occur.
3160 * For example, when converting from RGB24 to GRAY, the color information will
3161 * be lost. Similarly, other losses occur when converting from some formats to
3162 * other formats. These losses can involve loss of chroma, but also loss of
3163 * resolution, loss of color depth, loss due to the color space conversion, loss
3164 * of the alpha bits or loss due to color quantization.
3165 * avcodec_get_fix_fmt_loss() informs you about the various types of losses
3166 * which will occur when converting from one pixel format to another.
3167 *
3168 * @param[in] dst_pix_fmt destination pixel format
3169 * @param[in] src_pix_fmt source pixel format
3170 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
3171 * @return Combination of flags informing you what kind of losses will occur.
3172 */
3173int avcodec_get_pix_fmt_loss(enum PixelFormat dst_pix_fmt, enum PixelFormat src_pix_fmt,
3174 int has_alpha);
3175
3176/**
3177 * Find the best pixel format to convert to given a certain source pixel
3178 * format. When converting from one pixel format to another, information loss
3179 * may occur. For example, when converting from RGB24 to GRAY, the color
3180 * information will be lost. Similarly, other losses occur when converting from
3181 * some formats to other formats. avcodec_find_best_pix_fmt() searches which of
3182 * the given pixel formats should be used to suffer the least amount of loss.
3183 * The pixel formats from which it chooses one, are determined by the
3184 * pix_fmt_mask parameter.
3185 *
3186 * @code
3187 * src_pix_fmt = PIX_FMT_YUV420P;
3188 * pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << PIX_FMT_RGB24);
3189 * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
3190 * @endcode
3191 *
3192 * @param[in] pix_fmt_mask bitmask determining which pixel format to choose from
3193 * @param[in] src_pix_fmt source pixel format
3194 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
3195 * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
3196 * @return The best pixel format to convert to or -1 if none was found.
3197 */
3198enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt,
3199 int has_alpha, int *loss_ptr);
3200
3201
3202/**
3203 * Print in buf the string corresponding to the pixel format with
3204 * number pix_fmt, or an header if pix_fmt is negative.
3205 *
3206 * @param[in] buf the buffer where to write the string
3207 * @param[in] buf_size the size of buf
3208 * @param[in] pix_fmt the number of the pixel format to print the corresponding info string, or
3209 * a negative value to print the corresponding header.
3210 * Meaningful values for obtaining a pixel format info vary from 0 to PIX_FMT_NB -1.
3211 */
3212void avcodec_pix_fmt_string (char *buf, int buf_size, enum PixelFormat pix_fmt);
3213
3214#define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
3215#define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
3216
3217/**
3218 * Tell if an image really has transparent alpha values.
3219 * @return ored mask of FF_ALPHA_xxx constants
3220 */
3221int img_get_alpha_info(const AVPicture *src,
3222 enum PixelFormat pix_fmt, int width, int height);
3223
3224/* deinterlace a picture */
3225/* deinterlace - if not supported return -1 */
3226int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
3227 enum PixelFormat pix_fmt, int width, int height);
3228
3229/* external high level API */
3230
3231/**
3232 * If c is NULL, returns the first registered codec,
3233 * if c is non-NULL, returns the next registered codec after c,
3234 * or NULL if c is the last one.
3235 */
3236AVCodec *av_codec_next(AVCodec *c);
3237
3238/**
3239 * Return the LIBAVCODEC_VERSION_INT constant.
3240 */
3241unsigned avcodec_version(void);
3242
3243/**
3244 * Return the libavcodec build-time configuration.
3245 */
3246const char *avcodec_configuration(void);
3247
3248/**
3249 * Return the libavcodec license.
3250 */
3251const char *avcodec_license(void);
3252
3253/**
3254 * Initialize libavcodec.
3255 *
3256 * @warning This function must be called before any other libavcodec
3257 * function.
3258 */
3259void avcodec_init(void);
3260
3261#if LIBAVCODEC_VERSION_MAJOR < 53
3262/**
3263 * @deprecated Deprecated in favor of avcodec_register().
3264 */
3265attribute_deprecated void register_avcodec(AVCodec *codec);
3266#endif
3267
3268/**
3269 * Register the codec codec and initialize libavcodec.
3270 *
3271 * @see avcodec_init()
3272 */
3273void avcodec_register(AVCodec *codec);
3274
3275/**
3276 * Find a registered encoder with a matching codec ID.
3277 *
3278 * @param id CodecID of the requested encoder
3279 * @return An encoder if one was found, NULL otherwise.
3280 */
3281AVCodec *avcodec_find_encoder(enum CodecID id);
3282
3283/**
3284 * Find a registered encoder with the specified name.
3285 *
3286 * @param name name of the requested encoder
3287 * @return An encoder if one was found, NULL otherwise.
3288 */
3289AVCodec *avcodec_find_encoder_by_name(const char *name);
3290
3291/**
3292 * Find a registered decoder with a matching codec ID.
3293 *
3294 * @param id CodecID of the requested decoder
3295 * @return A decoder if one was found, NULL otherwise.
3296 */
3297AVCodec *avcodec_find_decoder(enum CodecID id);
3298
3299/**
3300 * Find a registered decoder with the specified name.
3301 *
3302 * @param name name of the requested decoder
3303 * @return A decoder if one was found, NULL otherwise.
3304 */
3305AVCodec *avcodec_find_decoder_by_name(const char *name);
3306void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
3307
3308/**
3309 * Set the fields of the given AVCodecContext to default values.
3310 *
3311 * @param s The AVCodecContext of which the fields should be set to default values.
3312 */
3313void avcodec_get_context_defaults(AVCodecContext *s);
3314
3315/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3316 * we WILL change its arguments and name a few times! */
3317void avcodec_get_context_defaults2(AVCodecContext *s, enum AVMediaType);
3318
3319/**
3320 * Allocate an AVCodecContext and set its fields to default values. The
3321 * resulting struct can be deallocated by simply calling av_free().
3322 *
3323 * @return An AVCodecContext filled with default values or NULL on failure.
3324 * @see avcodec_get_context_defaults
3325 */
3326AVCodecContext *avcodec_alloc_context(void);
3327
3328/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3329 * we WILL change its arguments and name a few times! */
3330AVCodecContext *avcodec_alloc_context2(enum AVMediaType);
3331
3332/**
3333 * Copy the settings of the source AVCodecContext into the destination
3334 * AVCodecContext. The resulting destination codec context will be
3335 * unopened, i.e. you are required to call avcodec_open() before you
3336 * can use this AVCodecContext to decode/encode video/audio data.
3337 *
3338 * @param dest target codec context, should be initialized with
3339 * avcodec_alloc_context(), but otherwise uninitialized
3340 * @param src source codec context
3341 * @return AVERROR() on error (e.g. memory allocation error), 0 on success
3342 */
3343int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src);
3344
3345/**
3346 * Set the fields of the given AVFrame to default values.
3347 *
3348 * @param pic The AVFrame of which the fields should be set to default values.
3349 */
3350void avcodec_get_frame_defaults(AVFrame *pic);
3351
3352/**
3353 * Allocate an AVFrame and set its fields to default values. The resulting
3354 * struct can be deallocated by simply calling av_free().
3355 *
3356 * @return An AVFrame filled with default values or NULL on failure.
3357 * @see avcodec_get_frame_defaults
3358 */
3359AVFrame *avcodec_alloc_frame(void);
3360
3361int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
3362void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
3363int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
3364
3365/**
3366 * Return the amount of padding in pixels which the get_buffer callback must
3367 * provide around the edge of the image for codecs which do not have the
3368 * CODEC_FLAG_EMU_EDGE flag.
3369 *
3370 * @return Required padding in pixels.
3371 */
3372unsigned avcodec_get_edge_width(void);
3373/**
3374 * Modify width and height values so that they will result in a memory
3375 * buffer that is acceptable for the codec if you do not use any horizontal
3376 * padding.
3377 *
3378 * May only be used if a codec with CODEC_CAP_DR1 has been opened.
3379 * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
3380 * according to avcodec_get_edge_width() before.
3381 */
3382void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
3383/**
3384 * Modify width and height values so that they will result in a memory
3385 * buffer that is acceptable for the codec if you also ensure that all
3386 * line sizes are a multiple of the respective linesize_align[i].
3387 *
3388 * May only be used if a codec with CODEC_CAP_DR1 has been opened.
3389 * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
3390 * according to avcodec_get_edge_width() before.
3391 */
3392void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
3393 int linesize_align[4]);
3394
3395#if LIBAVCODEC_VERSION_MAJOR < 53
3396/**
3397 * @deprecated Deprecated in favor of av_check_image_size().
3398 */
3399attribute_deprecated
3400int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
3401#endif
3402
3403enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
3404
3405int avcodec_thread_init(AVCodecContext *s, int thread_count);
3406void avcodec_thread_free(AVCodecContext *s);
3407int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size);
3408int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int, int),void *arg, int *ret, int count);
3409//FIXME func typedef
3410
3411/**
3412 * Initialize the AVCodecContext to use the given AVCodec. Prior to using this
3413 * function the context has to be allocated.
3414 *
3415 * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
3416 * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
3417 * retrieving a codec.
3418 *
3419 * @warning This function is not thread safe!
3420 *
3421 * @code
3422 * avcodec_register_all();
3423 * codec = avcodec_find_decoder(CODEC_ID_H264);
3424 * if (!codec)
3425 * exit(1);
3426 *
3427 * context = avcodec_alloc_context();
3428 *
3429 * if (avcodec_open(context, codec) < 0)
3430 * exit(1);
3431 * @endcode
3432 *
3433 * @param avctx The context which will be set up to use the given codec.
3434 * @param codec The codec to use within the context.
3435 * @return zero on success, a negative value on error
3436 * @see avcodec_alloc_context, avcodec_find_decoder, avcodec_find_encoder
3437 */
3438int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
3439
3440#if LIBAVCODEC_VERSION_MAJOR < 53
3441/**
3442 * Decode an audio frame from buf into samples.
3443 * Wrapper function which calls avcodec_decode_audio3.
3444 *
3445 * @deprecated Use avcodec_decode_audio3 instead.
3446 * @param avctx the codec context
3447 * @param[out] samples the output buffer
3448 * @param[in,out] frame_size_ptr the output buffer size in bytes
3449 * @param[in] buf the input buffer
3450 * @param[in] buf_size the input buffer size in bytes
3451 * @return On error a negative value is returned, otherwise the number of bytes
3452 * used or zero if no frame could be decompressed.
3453 */
3454attribute_deprecated int avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
3455 int *frame_size_ptr,
3456 const uint8_t *buf, int buf_size);
3457#endif
3458
3459/**
3460 * Decode the audio frame of size avpkt->size from avpkt->data into samples.
3461 * Some decoders may support multiple frames in a single AVPacket, such
3462 * decoders would then just decode the first frame. In this case,
3463 * avcodec_decode_audio3 has to be called again with an AVPacket that contains
3464 * the remaining data in order to decode the second frame etc.
3465 * If no frame
3466 * could be outputted, frame_size_ptr is zero. Otherwise, it is the
3467 * decompressed frame size in bytes.
3468 *
3469 * @warning You must set frame_size_ptr to the allocated size of the
3470 * output buffer before calling avcodec_decode_audio3().
3471 *
3472 * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
3473 * the actual read bytes because some optimized bitstream readers read 32 or 64
3474 * bits at once and could read over the end.
3475 *
3476 * @warning The end of the input buffer avpkt->data should be set to 0 to ensure that
3477 * no overreading happens for damaged MPEG streams.
3478 *
3479 * @note You might have to align the input buffer avpkt->data and output buffer
3480 * samples. The alignment requirements depend on the CPU: On some CPUs it isn't
3481 * necessary at all, on others it won't work at all if not aligned and on others
3482 * it will work but it will have an impact on performance.
3483 *
3484 * In practice, avpkt->data should have 4 byte alignment at minimum and
3485 * samples should be 16 byte aligned unless the CPU doesn't need it
3486 * (AltiVec and SSE do).
3487 *
3488 * @param avctx the codec context
3489 * @param[out] samples the output buffer, sample type in avctx->sample_fmt
3490 * @param[in,out] frame_size_ptr the output buffer size in bytes
3491 * @param[in] avpkt The input AVPacket containing the input buffer.
3492 * You can create such packet with av_init_packet() and by then setting
3493 * data and size, some decoders might in addition need other fields.
3494 * All decoders are designed to use the least fields possible though.
3495 * @return On error a negative value is returned, otherwise the number of bytes
3496 * used or zero if no frame data was decompressed (used) from the input AVPacket.
3497 */
3498int avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
3499 int *frame_size_ptr,
3500 AVPacket *avpkt);
3501
3502#if LIBAVCODEC_VERSION_MAJOR < 53
3503/**
3504 * Decode a video frame from buf into picture.
3505 * Wrapper function which calls avcodec_decode_video2.
3506 *
3507 * @deprecated Use avcodec_decode_video2 instead.
3508 * @param avctx the codec context
3509 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
3510 * @param[in] buf the input buffer
3511 * @param[in] buf_size the size of the input buffer in bytes
3512 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
3513 * @return On error a negative value is returned, otherwise the number of bytes
3514 * used or zero if no frame could be decompressed.
3515 */
3516attribute_deprecated int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
3517 int *got_picture_ptr,
3518 const uint8_t *buf, int buf_size);
3519#endif
3520
3521/**
3522 * Decode the video frame of size avpkt->size from avpkt->data into picture.
3523 * Some decoders may support multiple frames in a single AVPacket, such
3524 * decoders would then just decode the first frame.
3525 *
3526 * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
3527 * the actual read bytes because some optimized bitstream readers read 32 or 64
3528 * bits at once and could read over the end.
3529 *
3530 * @warning The end of the input buffer buf should be set to 0 to ensure that
3531 * no overreading happens for damaged MPEG streams.
3532 *
3533 * @note You might have to align the input buffer avpkt->data.
3534 * The alignment requirements depend on the CPU: on some CPUs it isn't
3535 * necessary at all, on others it won't work at all if not aligned and on others
3536 * it will work but it will have an impact on performance.
3537 *
3538 * In practice, avpkt->data should have 4 byte alignment at minimum.
3539 *
3540 * @note Some codecs have a delay between input and output, these need to be
3541 * fed with avpkt->data=NULL, avpkt->size=0 at the end to return the remaining frames.
3542 *
3543 * @param avctx the codec context
3544 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
3545 * Use avcodec_alloc_frame to get an AVFrame, the codec will
3546 * allocate memory for the actual bitmap.
3547 * with default get/release_buffer(), the decoder frees/reuses the bitmap as it sees fit.
3548 * with overridden get/release_buffer() (needs CODEC_CAP_DR1) the user decides into what buffer the decoder
3549 * decodes and the decoder tells the user once it does not need the data anymore,
3550 * the user app can at this point free/reuse/keep the memory as it sees fit.
3551 *
3552 * @param[in] avpkt The input AVpacket containing the input buffer.
3553 * You can create such packet with av_init_packet() and by then setting
3554 * data and size, some decoders might in addition need other fields like
3555 * flags&AV_PKT_FLAG_KEY. All decoders are designed to use the least
3556 * fields possible.
3557 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
3558 * @return On error a negative value is returned, otherwise the number of bytes
3559 * used or zero if no frame could be decompressed.
3560 */
3561int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
3562 int *got_picture_ptr,
3563 AVPacket *avpkt);
3564
3565#if LIBAVCODEC_VERSION_MAJOR < 53
3566/* Decode a subtitle message. Return -1 if error, otherwise return the
3567 * number of bytes used. If no subtitle could be decompressed,
3568 * got_sub_ptr is zero. Otherwise, the subtitle is stored in *sub. */
3569attribute_deprecated int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
3570 int *got_sub_ptr,
3571 const uint8_t *buf, int buf_size);
3572#endif
3573
3574/**
3575 * Decode a subtitle message.
3576 * Return a negative value on error, otherwise return the number of bytes used.
3577 * If no subtitle could be decompressed, got_sub_ptr is zero.
3578 * Otherwise, the subtitle is stored in *sub.
3579 * Note that CODEC_CAP_DR1 is not available for subtitle codecs. This is for
3580 * simplicity, because the performance difference is expect to be negligible
3581 * and reusing a get_buffer written for video codecs would probably perform badly
3582 * due to a potentially very different allocation pattern.
3583 *
3584 * @param avctx the codec context
3585 * @param[out] sub The AVSubtitle in which the decoded subtitle will be stored, must be
3586 freed with avsubtitle_free if *got_sub_ptr is set.
3587 * @param[in,out] got_sub_ptr Zero if no subtitle could be decompressed, otherwise, it is nonzero.
3588 * @param[in] avpkt The input AVPacket containing the input buffer.
3589 */
3590int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
3591 int *got_sub_ptr,
3592 AVPacket *avpkt);
3593
3594/**
3595 * Frees all allocated data in the given subtitle struct.
3596 *
3597 * @param sub AVSubtitle to free.
3598 */
3599void avsubtitle_free(AVSubtitle *sub);
3600
3601int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
3602 int *data_size_ptr,
3603 uint8_t *buf, int buf_size);
3604
3605/**
3606 * Encode an audio frame from samples into buf.
3607 *
3608 * @note The output buffer should be at least FF_MIN_BUFFER_SIZE bytes large.
3609 * However, for PCM audio the user will know how much space is needed
3610 * because it depends on the value passed in buf_size as described
3611 * below. In that case a lower value can be used.
3612 *
3613 * @param avctx the codec context
3614 * @param[out] buf the output buffer
3615 * @param[in] buf_size the output buffer size
3616 * @param[in] samples the input buffer containing the samples
3617 * The number of samples read from this buffer is frame_size*channels,
3618 * both of which are defined in avctx.
3619 * For PCM audio the number of samples read from samples is equal to
3620 * buf_size * input_sample_size / output_sample_size.
3621 * @return On error a negative value is returned, on success zero or the number
3622 * of bytes used to encode the data read from the input buffer.
3623 */
3624int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3625 const short *samples);
3626
3627/**
3628 * Encode a video frame from pict into buf.
3629 * The input picture should be
3630 * stored using a specific format, namely avctx.pix_fmt.
3631 *
3632 * @param avctx the codec context
3633 * @param[out] buf the output buffer for the bitstream of encoded frame
3634 * @param[in] buf_size the size of the output buffer in bytes
3635 * @param[in] pict the input picture to encode
3636 * @return On error a negative value is returned, on success zero or the number
3637 * of bytes used from the output buffer.
3638 */
3639int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3640 const AVFrame *pict);
3641int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3642 const AVSubtitle *sub);
3643
3644int avcodec_close(AVCodecContext *avctx);
3645
3646/**
3647 * Register all the codecs, parsers and bitstream filters which were enabled at
3648 * configuration time. If you do not call this function you can select exactly
3649 * which formats you want to support, by using the individual registration
3650 * functions.
3651 *
3652 * @see avcodec_register
3653 * @see av_register_codec_parser
3654 * @see av_register_bitstream_filter
3655 */
3656void avcodec_register_all(void);
3657
3658/**
3659 * Flush buffers, should be called when seeking or when switching to a different stream.
3660 */
3661void avcodec_flush_buffers(AVCodecContext *avctx);
3662
3663void avcodec_default_free_buffers(AVCodecContext *s);
3664
3665/* misc useful functions */
3666
3667/**
3668 * Return a single letter to describe the given picture type pict_type.
3669 *
3670 * @param[in] pict_type the picture type
3671 * @return A single character representing the picture type.
3672 */
3673char av_get_pict_type_char(int pict_type);
3674
3675/**
3676 * Return codec bits per sample.
3677 *
3678 * @param[in] codec_id the codec
3679 * @return Number of bits per sample or zero if unknown for the given codec.
3680 */
3681int av_get_bits_per_sample(enum CodecID codec_id);
3682
3683/**
3684 * Return sample format bits per sample.
3685 *
3686 * @param[in] sample_fmt the sample format
3687 * @return Number of bits per sample or zero if unknown for the given sample format.
3688 */
3689int av_get_bits_per_sample_format(enum SampleFormat sample_fmt);
3690
3691/* frame parsing */
3692typedef struct AVCodecParserContext {
3693 void *priv_data;
3694 struct AVCodecParser *parser;
3695 int64_t frame_offset; /* offset of the current frame */
3696 int64_t cur_offset; /* current offset
3697 (incremented by each av_parser_parse()) */
3698 int64_t next_frame_offset; /* offset of the next frame */
3699 /* video info */
3700 int pict_type; /* XXX: Put it back in AVCodecContext. */
3701 /**
3702 * This field is used for proper frame duration computation in lavf.
3703 * It signals, how much longer the frame duration of the current frame
3704 * is compared to normal frame duration.
3705 *
3706 * frame_duration = (1 + repeat_pict) * time_base
3707 *
3708 * It is used by codecs like H.264 to display telecined material.
3709 */
3710 int repeat_pict; /* XXX: Put it back in AVCodecContext. */
3711 int64_t pts; /* pts of the current frame */
3712 int64_t dts; /* dts of the current frame */
3713
3714 /* private data */
3715 int64_t last_pts;
3716 int64_t last_dts;
3717 int fetch_timestamp;
3718
3719#define AV_PARSER_PTS_NB 4
3720 int cur_frame_start_index;
3721 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
3722 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
3723 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
3724
3725 int flags;
3726#define PARSER_FLAG_COMPLETE_FRAMES 0x0001
3727#define PARSER_FLAG_ONCE 0x0002
3728
3729 int64_t offset; ///< byte offset from starting packet start
3730 int64_t cur_frame_end[AV_PARSER_PTS_NB];
3731
3732 /*!
3733 * Set by parser to 1 for key frames and 0 for non-key frames.
3734 * It is initialized to -1, so if the parser doesn't set this flag,
3735 * old-style fallback using FF_I_TYPE picture type as key frames
3736 * will be used.
3737 */
3738 int key_frame;
3739
3740 /**
3741 * Time difference in stream time base units from the pts of this
3742 * packet to the point at which the output from the decoder has converged
3743 * independent from the availability of previous frames. That is, the
3744 * frames are virtually identical no matter if decoding started from
3745 * the very first frame or from this keyframe.
3746 * Is AV_NOPTS_VALUE if unknown.
3747 * This field is not the display duration of the current frame.
3748 * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
3749 * set.
3750 *
3751 * The purpose of this field is to allow seeking in streams that have no
3752 * keyframes in the conventional sense. It corresponds to the
3753 * recovery point SEI in H.264 and match_time_delta in NUT. It is also
3754 * essential for some types of subtitle streams to ensure that all
3755 * subtitles are correctly displayed after seeking.
3756 */
3757 int64_t convergence_duration;
3758
3759 // Timestamp generation support:
3760 /**
3761 * Synchronization point for start of timestamp generation.
3762 *
3763 * Set to >0 for sync point, 0 for no sync point and <0 for undefined
3764 * (default).
3765 *
3766 * For example, this corresponds to presence of H.264 buffering period
3767 * SEI message.
3768 */
3769 int dts_sync_point;
3770
3771 /**
3772 * Offset of the current timestamp against last timestamp sync point in
3773 * units of AVCodecContext.time_base.
3774 *
3775 * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
3776 * contain a valid timestamp offset.
3777 *
3778 * Note that the timestamp of sync point has usually a nonzero
3779 * dts_ref_dts_delta, which refers to the previous sync point. Offset of
3780 * the next frame after timestamp sync point will be usually 1.
3781 *
3782 * For example, this corresponds to H.264 cpb_removal_delay.
3783 */
3784 int dts_ref_dts_delta;
3785
3786 /**
3787 * Presentation delay of current frame in units of AVCodecContext.time_base.
3788 *
3789 * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
3790 * contain valid non-negative timestamp delta (presentation time of a frame
3791 * must not lie in the past).
3792 *
3793 * This delay represents the difference between decoding and presentation
3794 * time of the frame.
3795 *
3796 * For example, this corresponds to H.264 dpb_output_delay.
3797 */
3798 int pts_dts_delta;
3799
3800 /**
3801 * Position of the packet in file.
3802 *
3803 * Analogous to cur_frame_pts/dts
3804 */
3805 int64_t cur_frame_pos[AV_PARSER_PTS_NB];
3806
3807 /**
3808 * Byte position of currently parsed frame in stream.
3809 */
3810 int64_t pos;
3811
3812 /**
3813 * Previous frame byte position.
3814 */
3815 int64_t last_pos;
3816} AVCodecParserContext;
3817
3818typedef struct AVCodecParser {
3819 int codec_ids[5]; /* several codec IDs are permitted */
3820 int priv_data_size;
3821 int (*parser_init)(AVCodecParserContext *s);
3822 int (*parser_parse)(AVCodecParserContext *s,
3823 AVCodecContext *avctx,
3824 const uint8_t **poutbuf, int *poutbuf_size,
3825 const uint8_t *buf, int buf_size);
3826 void (*parser_close)(AVCodecParserContext *s);
3827 int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
3828 struct AVCodecParser *next;
3829} AVCodecParser;
3830
3831AVCodecParser *av_parser_next(AVCodecParser *c);
3832
3833void av_register_codec_parser(AVCodecParser *parser);
3834AVCodecParserContext *av_parser_init(int codec_id);
3835
3836#if LIBAVCODEC_VERSION_MAJOR < 53
3837attribute_deprecated
3838int av_parser_parse(AVCodecParserContext *s,
3839 AVCodecContext *avctx,
3840 uint8_t **poutbuf, int *poutbuf_size,
3841 const uint8_t *buf, int buf_size,
3842 int64_t pts, int64_t dts);
3843#endif
3844
3845/**
3846 * Parse a packet.
3847 *
3848 * @param s parser context.
3849 * @param avctx codec context.
3850 * @param poutbuf set to pointer to parsed buffer or NULL if not yet finished.
3851 * @param poutbuf_size set to size of parsed buffer or zero if not yet finished.
3852 * @param buf input buffer.
3853 * @param buf_size input length, to signal EOF, this should be 0 (so that the last frame can be output).
3854 * @param pts input presentation timestamp.
3855 * @param dts input decoding timestamp.
3856 * @param pos input byte position in stream.
3857 * @return the number of bytes of the input bitstream used.
3858 *
3859 * Example:
3860 * @code
3861 * while(in_len){
3862 * len = av_parser_parse2(myparser, AVCodecContext, &data, &size,
3863 * in_data, in_len,
3864 * pts, dts, pos);
3865 * in_data += len;
3866 * in_len -= len;
3867 *
3868 * if(size)
3869 * decode_frame(data, size);
3870 * }
3871 * @endcode
3872 */
3873int av_parser_parse2(AVCodecParserContext *s,
3874 AVCodecContext *avctx,
3875 uint8_t **poutbuf, int *poutbuf_size,
3876 const uint8_t *buf, int buf_size,
3877 int64_t pts, int64_t dts,
3878 int64_t pos);
3879
3880int av_parser_change(AVCodecParserContext *s,
3881 AVCodecContext *avctx,
3882 uint8_t **poutbuf, int *poutbuf_size,
3883 const uint8_t *buf, int buf_size, int keyframe);
3884void av_parser_close(AVCodecParserContext *s);
3885
3886
3887typedef struct AVBitStreamFilterContext {
3888 void *priv_data;
3889 struct AVBitStreamFilter *filter;
3890 AVCodecParserContext *parser;
3891 struct AVBitStreamFilterContext *next;
3892} AVBitStreamFilterContext;
3893
3894
3895typedef struct AVBitStreamFilter {
3896 const char *name;
3897 int priv_data_size;
3898 int (*filter)(AVBitStreamFilterContext *bsfc,
3899 AVCodecContext *avctx, const char *args,
3900 uint8_t **poutbuf, int *poutbuf_size,
3901 const uint8_t *buf, int buf_size, int keyframe);
3902 void (*close)(AVBitStreamFilterContext *bsfc);
3903 struct AVBitStreamFilter *next;
3904} AVBitStreamFilter;
3905
3906void av_register_bitstream_filter(AVBitStreamFilter *bsf);
3907AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
3908int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
3909 AVCodecContext *avctx, const char *args,
3910 uint8_t **poutbuf, int *poutbuf_size,
3911 const uint8_t *buf, int buf_size, int keyframe);
3912void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
3913
3914AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f);
3915
3916/* memory */
3917
3918/**
3919 * Reallocate the given block if it is not large enough, otherwise do nothing.
3920 *
3921 * @see av_realloc
3922 */
3923void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
3924
3925/**
3926 * Allocate a buffer, reusing the given one if large enough.
3927 *
3928 * Contrary to av_fast_realloc the current buffer contents might not be
3929 * preserved and on error the old buffer is freed, thus no special
3930 * handling to avoid memleaks is necessary.
3931 *
3932 * @param ptr pointer to pointer to already allocated buffer, overwritten with pointer to new buffer
3933 * @param size size of the buffer *ptr points to
3934 * @param min_size minimum size of *ptr buffer after returning, *ptr will be NULL and
3935 * *size 0 if an error occurred.
3936 */
3937void av_fast_malloc(void *ptr, unsigned int *size, unsigned int min_size);
3938
3939/**
3940 * Copy image 'src' to 'dst'.
3941 */
3942void av_picture_copy(AVPicture *dst, const AVPicture *src,
3943 enum PixelFormat pix_fmt, int width, int height);
3944
3945/**
3946 * Crop image top and left side.
3947 */
3948int av_picture_crop(AVPicture *dst, const AVPicture *src,
3949 enum PixelFormat pix_fmt, int top_band, int left_band);
3950
3951/**
3952 * Pad image.
3953 */
3954int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, enum PixelFormat pix_fmt,
3955 int padtop, int padbottom, int padleft, int padright, int *color);
3956
3957/**
3958 * Encode extradata length to a buffer. Used by xiph codecs.
3959 *
3960 * @param s buffer to write to; must be at least (v/255+1) bytes long
3961 * @param v size of extradata in bytes
3962 * @return number of bytes written to the buffer.
3963 */
3964unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
3965
3966#if LIBAVCODEC_VERSION_MAJOR < 53
3967/**
3968 * Parse str and put in width_ptr and height_ptr the detected values.
3969 *
3970 * @deprecated Deprecated in favor of av_parse_video_size().
3971 */
3972attribute_deprecated int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str);
3973
3974/**
3975 * Parse str and store the detected values in *frame_rate.
3976 *
3977 * @deprecated Deprecated in favor of av_parse_video_rate().
3978 */
3979//attribute_deprecated int av_parse_video_frame_rate(AVRational *frame_rate, const char *str);
3980#endif
3981
3982/**
3983 * Logs a generic warning message about a missing feature. This function is
3984 * intended to be used internally by FFmpeg (libavcodec, libavformat, etc.)
3985 * only, and would normally not be used by applications.
3986 * @param[in] avc a pointer to an arbitrary struct of which the first field is
3987 * a pointer to an AVClass struct
3988 * @param[in] feature string containing the name of the missing feature
3989 * @param[in] want_sample indicates if samples are wanted which exhibit this feature.
3990 * If want_sample is non-zero, additional verbage will be added to the log
3991 * message which tells the user how to report samples to the development
3992 * mailing list.
3993 */
3994void av_log_missing_feature(void *avc, const char *feature, int want_sample);
3995
3996/**
3997 * Log a generic warning message asking for a sample. This function is
3998 * intended to be used internally by FFmpeg (libavcodec, libavformat, etc.)
3999 * only, and would normally not be used by applications.
4000 * @param[in] avc a pointer to an arbitrary struct of which the first field is
4001 * a pointer to an AVClass struct
4002 * @param[in] msg string containing an optional message, or NULL if no message
4003 */
4004void av_log_ask_for_sample(void *avc, const char *msg);
4005
4006/**
4007 * Register the hardware accelerator hwaccel.
4008 */
4009void av_register_hwaccel(AVHWAccel *hwaccel);
4010
4011/**
4012 * If hwaccel is NULL, returns the first registered hardware accelerator,
4013 * if hwaccel is non-NULL, returns the next registered hardware accelerator
4014 * after hwaccel, or NULL if hwaccel is the last one.
4015 */
4016AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel);
4017
4018
4019/**
4020 * Lock operation used by lockmgr
4021 */
4022enum AVLockOp {
4023 AV_LOCK_CREATE, ///< Create a mutex
4024 AV_LOCK_OBTAIN, ///< Lock the mutex
4025 AV_LOCK_RELEASE, ///< Unlock the mutex
4026 AV_LOCK_DESTROY, ///< Free mutex resources
4027};
4028
4029/**
4030 * Register a user provided lock manager supporting the operations
4031 * specified by AVLockOp. mutex points to a (void *) where the
4032 * lockmgr should store/get a pointer to a user allocated mutex. It's
4033 * NULL upon AV_LOCK_CREATE and != NULL for all other ops.
4034 *
4035 * @param cb User defined callback. Note: FFmpeg may invoke calls to this
4036 * callback during the call to av_lockmgr_register().
4037 * Thus, the application must be prepared to handle that.
4038 * If cb is set to NULL the lockmgr will be unregistered.
4039 * Also note that during unregistration the previously registered
4040 * lockmgr callback may also be invoked.
4041 */
4042int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op));
4043
4044#endif /* AVCODEC_AVCODEC_H */
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