Statistics
| Branch: | Revision:

ffmpeg / libavcodec / avcodec.h @ 2f46a0af

History | View | Annotate | Download (140 KB)

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/samplefmt.h"
31
#include "libavutil/avutil.h"
32
#include "libavutil/cpu.h"
33

    
34
#define LIBAVCODEC_VERSION_MAJOR 52
35
#define LIBAVCODEC_VERSION_MINOR 114
36
#define LIBAVCODEC_VERSION_MICRO  0
37

    
38
#define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
39
                                               LIBAVCODEC_VERSION_MINOR, \
40
                                               LIBAVCODEC_VERSION_MICRO)
41
#define LIBAVCODEC_VERSION      AV_VERSION(LIBAVCODEC_VERSION_MAJOR,    \
42
                                           LIBAVCODEC_VERSION_MINOR,    \
43
                                           LIBAVCODEC_VERSION_MICRO)
44
#define LIBAVCODEC_BUILD        LIBAVCODEC_VERSION_INT
45

    
46
#define LIBAVCODEC_IDENT        "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
47

    
48
/**
49
 * Those FF_API_* defines are not part of public API.
50
 * They may change, break or disappear at any time.
51
 */
52
#ifndef FF_API_PALETTE_CONTROL
53
#define FF_API_PALETTE_CONTROL  (LIBAVCODEC_VERSION_MAJOR < 54)
54
#endif
55
#ifndef FF_API_MM_FLAGS
56
#define FF_API_MM_FLAGS         (LIBAVCODEC_VERSION_MAJOR < 53)
57
#endif
58
#ifndef FF_API_OPT_SHOW
59
#define FF_API_OPT_SHOW         (LIBAVCODEC_VERSION_MAJOR < 53)
60
#endif
61
#ifndef FF_API_AUDIO_OLD
62
#define FF_API_AUDIO_OLD        (LIBAVCODEC_VERSION_MAJOR < 53)
63
#endif
64
#ifndef FF_API_VIDEO_OLD
65
#define FF_API_VIDEO_OLD        (LIBAVCODEC_VERSION_MAJOR < 53)
66
#endif
67
#ifndef FF_API_SUBTITLE_OLD
68
#define FF_API_SUBTITLE_OLD     (LIBAVCODEC_VERSION_MAJOR < 53)
69
#endif
70
#ifndef FF_API_USE_LPC
71
#define FF_API_USE_LPC          (LIBAVCODEC_VERSION_MAJOR < 53)
72
#endif
73
#ifndef FF_API_SET_STRING_OLD
74
#define FF_API_SET_STRING_OLD   (LIBAVCODEC_VERSION_MAJOR < 53)
75
#endif
76
#ifndef FF_API_INOFFICIAL
77
#define FF_API_INOFFICIAL       (LIBAVCODEC_VERSION_MAJOR < 53)
78
#endif
79
#ifndef FF_API_OLD_SAMPLE_FMT
80
#define FF_API_OLD_SAMPLE_FMT   (LIBAVCODEC_VERSION_MAJOR < 53)
81
#endif
82
#ifndef FF_API_OLD_AUDIOCONVERT
83
#define FF_API_OLD_AUDIOCONVERT (LIBAVCODEC_VERSION_MAJOR < 53)
84
#endif
85

    
86
#if LIBAVCODEC_VERSION_MAJOR < 53
87
#   define FF_INTERNALC_MEM_TYPE unsigned int
88
#else
89
#   define FF_INTERNALC_MEM_TYPE size_t
90
#endif
91

    
92
/**
93
 * Identify the syntax and semantics of the bitstream.
94
 * The principle is roughly:
95
 * Two decoders with the same ID can decode the same streams.
96
 * Two encoders with the same ID can encode compatible streams.
97
 * There may be slight deviations from the principle due to implementation
98
 * details.
99
 *
100
 * If you add a codec ID to this list, add it so that
101
 * 1. no value of a existing codec ID changes (that would break ABI),
102
 * 2. it is as close as possible to similar codecs.
103
 */
104
enum CodecID {
105
    CODEC_ID_NONE,
106

    
107
    /* video codecs */
108
    CODEC_ID_MPEG1VIDEO,
109
    CODEC_ID_MPEG2VIDEO, ///< preferred ID for MPEG-1/2 video decoding
110
    CODEC_ID_MPEG2VIDEO_XVMC,
111
    CODEC_ID_H261,
112
    CODEC_ID_H263,
113
    CODEC_ID_RV10,
114
    CODEC_ID_RV20,
115
    CODEC_ID_MJPEG,
116
    CODEC_ID_MJPEGB,
117
    CODEC_ID_LJPEG,
118
    CODEC_ID_SP5X,
119
    CODEC_ID_JPEGLS,
120
    CODEC_ID_MPEG4,
121
    CODEC_ID_RAWVIDEO,
122
    CODEC_ID_MSMPEG4V1,
123
    CODEC_ID_MSMPEG4V2,
124
    CODEC_ID_MSMPEG4V3,
125
    CODEC_ID_WMV1,
126
    CODEC_ID_WMV2,
127
    CODEC_ID_H263P,
128
    CODEC_ID_H263I,
129
    CODEC_ID_FLV1,
130
    CODEC_ID_SVQ1,
131
    CODEC_ID_SVQ3,
132
    CODEC_ID_DVVIDEO,
133
    CODEC_ID_HUFFYUV,
134
    CODEC_ID_CYUV,
135
    CODEC_ID_H264,
136
    CODEC_ID_INDEO3,
137
    CODEC_ID_VP3,
138
    CODEC_ID_THEORA,
139
    CODEC_ID_ASV1,
140
    CODEC_ID_ASV2,
141
    CODEC_ID_FFV1,
142
    CODEC_ID_4XM,
143
    CODEC_ID_VCR1,
144
    CODEC_ID_CLJR,
145
    CODEC_ID_MDEC,
146
    CODEC_ID_ROQ,
147
    CODEC_ID_INTERPLAY_VIDEO,
148
    CODEC_ID_XAN_WC3,
149
    CODEC_ID_XAN_WC4,
150
    CODEC_ID_RPZA,
151
    CODEC_ID_CINEPAK,
152
    CODEC_ID_WS_VQA,
153
    CODEC_ID_MSRLE,
154
    CODEC_ID_MSVIDEO1,
155
    CODEC_ID_IDCIN,
156
    CODEC_ID_8BPS,
157
    CODEC_ID_SMC,
158
    CODEC_ID_FLIC,
159
    CODEC_ID_TRUEMOTION1,
160
    CODEC_ID_VMDVIDEO,
161
    CODEC_ID_MSZH,
162
    CODEC_ID_ZLIB,
163
    CODEC_ID_QTRLE,
164
    CODEC_ID_SNOW,
165
    CODEC_ID_TSCC,
166
    CODEC_ID_ULTI,
167
    CODEC_ID_QDRAW,
168
    CODEC_ID_VIXL,
169
    CODEC_ID_QPEG,
170
#if LIBAVCODEC_VERSION_MAJOR < 53
171
    CODEC_ID_XVID,
172
#endif
173
    CODEC_ID_PNG,
174
    CODEC_ID_PPM,
175
    CODEC_ID_PBM,
176
    CODEC_ID_PGM,
177
    CODEC_ID_PGMYUV,
178
    CODEC_ID_PAM,
179
    CODEC_ID_FFVHUFF,
180
    CODEC_ID_RV30,
181
    CODEC_ID_RV40,
182
    CODEC_ID_VC1,
183
    CODEC_ID_WMV3,
184
    CODEC_ID_LOCO,
185
    CODEC_ID_WNV1,
186
    CODEC_ID_AASC,
187
    CODEC_ID_INDEO2,
188
    CODEC_ID_FRAPS,
189
    CODEC_ID_TRUEMOTION2,
190
    CODEC_ID_BMP,
191
    CODEC_ID_CSCD,
192
    CODEC_ID_MMVIDEO,
193
    CODEC_ID_ZMBV,
194
    CODEC_ID_AVS,
195
    CODEC_ID_SMACKVIDEO,
196
    CODEC_ID_NUV,
197
    CODEC_ID_KMVC,
198
    CODEC_ID_FLASHSV,
199
    CODEC_ID_CAVS,
200
    CODEC_ID_JPEG2000,
201
    CODEC_ID_VMNC,
202
    CODEC_ID_VP5,
203
    CODEC_ID_VP6,
204
    CODEC_ID_VP6F,
205
    CODEC_ID_TARGA,
206
    CODEC_ID_DSICINVIDEO,
207
    CODEC_ID_TIERTEXSEQVIDEO,
208
    CODEC_ID_TIFF,
209
    CODEC_ID_GIF,
210
    CODEC_ID_FFH264,
211
    CODEC_ID_DXA,
212
    CODEC_ID_DNXHD,
213
    CODEC_ID_THP,
214
    CODEC_ID_SGI,
215
    CODEC_ID_C93,
216
    CODEC_ID_BETHSOFTVID,
217
    CODEC_ID_PTX,
218
    CODEC_ID_TXD,
219
    CODEC_ID_VP6A,
220
    CODEC_ID_AMV,
221
    CODEC_ID_VB,
222
    CODEC_ID_PCX,
223
    CODEC_ID_SUNRAST,
224
    CODEC_ID_INDEO4,
225
    CODEC_ID_INDEO5,
226
    CODEC_ID_MIMIC,
227
    CODEC_ID_RL2,
228
    CODEC_ID_8SVX_EXP,
229
    CODEC_ID_8SVX_FIB,
230
    CODEC_ID_ESCAPE124,
231
    CODEC_ID_DIRAC,
232
    CODEC_ID_BFI,
233
    CODEC_ID_CMV,
234
    CODEC_ID_MOTIONPIXELS,
235
    CODEC_ID_TGV,
236
    CODEC_ID_TGQ,
237
    CODEC_ID_TQI,
238
    CODEC_ID_AURA,
239
    CODEC_ID_AURA2,
240
    CODEC_ID_V210X,
241
    CODEC_ID_TMV,
242
    CODEC_ID_V210,
243
    CODEC_ID_DPX,
244
    CODEC_ID_MAD,
245
    CODEC_ID_FRWU,
246
    CODEC_ID_FLASHSV2,
247
    CODEC_ID_CDGRAPHICS,
248
    CODEC_ID_R210,
249
    CODEC_ID_ANM,
250
    CODEC_ID_BINKVIDEO,
251
    CODEC_ID_IFF_ILBM,
252
    CODEC_ID_IFF_BYTERUN1,
253
    CODEC_ID_KGV1,
254
    CODEC_ID_YOP,
255
    CODEC_ID_VP8,
256
    CODEC_ID_PICTOR,
257
    CODEC_ID_ANSI,
258
    CODEC_ID_A64_MULTI,
259
    CODEC_ID_A64_MULTI5,
260
    CODEC_ID_R10K,
261
    CODEC_ID_MXPEG,
262
    CODEC_ID_LAGARITH,
263
    CODEC_ID_PRORES,
264
    CODEC_ID_JV,
265

    
266
    /* various PCM "codecs" */
267
    CODEC_ID_PCM_S16LE= 0x10000,
268
    CODEC_ID_PCM_S16BE,
269
    CODEC_ID_PCM_U16LE,
270
    CODEC_ID_PCM_U16BE,
271
    CODEC_ID_PCM_S8,
272
    CODEC_ID_PCM_U8,
273
    CODEC_ID_PCM_MULAW,
274
    CODEC_ID_PCM_ALAW,
275
    CODEC_ID_PCM_S32LE,
276
    CODEC_ID_PCM_S32BE,
277
    CODEC_ID_PCM_U32LE,
278
    CODEC_ID_PCM_U32BE,
279
    CODEC_ID_PCM_S24LE,
280
    CODEC_ID_PCM_S24BE,
281
    CODEC_ID_PCM_U24LE,
282
    CODEC_ID_PCM_U24BE,
283
    CODEC_ID_PCM_S24DAUD,
284
    CODEC_ID_PCM_ZORK,
285
    CODEC_ID_PCM_S16LE_PLANAR,
286
    CODEC_ID_PCM_DVD,
287
    CODEC_ID_PCM_F32BE,
288
    CODEC_ID_PCM_F32LE,
289
    CODEC_ID_PCM_F64BE,
290
    CODEC_ID_PCM_F64LE,
291
    CODEC_ID_PCM_BLURAY,
292
    CODEC_ID_PCM_LXF,
293

    
294
    /* various ADPCM codecs */
295
    CODEC_ID_ADPCM_IMA_QT= 0x11000,
296
    CODEC_ID_ADPCM_IMA_WAV,
297
    CODEC_ID_ADPCM_IMA_DK3,
298
    CODEC_ID_ADPCM_IMA_DK4,
299
    CODEC_ID_ADPCM_IMA_WS,
300
    CODEC_ID_ADPCM_IMA_SMJPEG,
301
    CODEC_ID_ADPCM_MS,
302
    CODEC_ID_ADPCM_4XM,
303
    CODEC_ID_ADPCM_XA,
304
    CODEC_ID_ADPCM_ADX,
305
    CODEC_ID_ADPCM_EA,
306
    CODEC_ID_ADPCM_G726,
307
    CODEC_ID_ADPCM_CT,
308
    CODEC_ID_ADPCM_SWF,
309
    CODEC_ID_ADPCM_YAMAHA,
310
    CODEC_ID_ADPCM_SBPRO_4,
311
    CODEC_ID_ADPCM_SBPRO_3,
312
    CODEC_ID_ADPCM_SBPRO_2,
313
    CODEC_ID_ADPCM_THP,
314
    CODEC_ID_ADPCM_IMA_AMV,
315
    CODEC_ID_ADPCM_EA_R1,
316
    CODEC_ID_ADPCM_EA_R3,
317
    CODEC_ID_ADPCM_EA_R2,
318
    CODEC_ID_ADPCM_IMA_EA_SEAD,
319
    CODEC_ID_ADPCM_IMA_EA_EACS,
320
    CODEC_ID_ADPCM_EA_XAS,
321
    CODEC_ID_ADPCM_EA_MAXIS_XA,
322
    CODEC_ID_ADPCM_IMA_ISS,
323
    CODEC_ID_ADPCM_G722,
324

    
325
    /* AMR */
326
    CODEC_ID_AMR_NB= 0x12000,
327
    CODEC_ID_AMR_WB,
328

    
329
    /* RealAudio codecs*/
330
    CODEC_ID_RA_144= 0x13000,
331
    CODEC_ID_RA_288,
332

    
333
    /* various DPCM codecs */
334
    CODEC_ID_ROQ_DPCM= 0x14000,
335
    CODEC_ID_INTERPLAY_DPCM,
336
    CODEC_ID_XAN_DPCM,
337
    CODEC_ID_SOL_DPCM,
338

    
339
    /* audio codecs */
340
    CODEC_ID_MP2= 0x15000,
341
    CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3
342
    CODEC_ID_AAC,
343
    CODEC_ID_AC3,
344
    CODEC_ID_DTS,
345
    CODEC_ID_VORBIS,
346
    CODEC_ID_DVAUDIO,
347
    CODEC_ID_WMAV1,
348
    CODEC_ID_WMAV2,
349
    CODEC_ID_MACE3,
350
    CODEC_ID_MACE6,
351
    CODEC_ID_VMDAUDIO,
352
    CODEC_ID_SONIC,
353
    CODEC_ID_SONIC_LS,
354
    CODEC_ID_FLAC,
355
    CODEC_ID_MP3ADU,
356
    CODEC_ID_MP3ON4,
357
    CODEC_ID_SHORTEN,
358
    CODEC_ID_ALAC,
359
    CODEC_ID_WESTWOOD_SND1,
360
    CODEC_ID_GSM, ///< as in Berlin toast format
361
    CODEC_ID_QDM2,
362
    CODEC_ID_COOK,
363
    CODEC_ID_TRUESPEECH,
364
    CODEC_ID_TTA,
365
    CODEC_ID_SMACKAUDIO,
366
    CODEC_ID_QCELP,
367
    CODEC_ID_WAVPACK,
368
    CODEC_ID_DSICINAUDIO,
369
    CODEC_ID_IMC,
370
    CODEC_ID_MUSEPACK7,
371
    CODEC_ID_MLP,
372
    CODEC_ID_GSM_MS, /* as found in WAV */
373
    CODEC_ID_ATRAC3,
374
    CODEC_ID_VOXWARE,
375
    CODEC_ID_APE,
376
    CODEC_ID_NELLYMOSER,
377
    CODEC_ID_MUSEPACK8,
378
    CODEC_ID_SPEEX,
379
    CODEC_ID_WMAVOICE,
380
    CODEC_ID_WMAPRO,
381
    CODEC_ID_WMALOSSLESS,
382
    CODEC_ID_ATRAC3P,
383
    CODEC_ID_EAC3,
384
    CODEC_ID_SIPR,
385
    CODEC_ID_MP1,
386
    CODEC_ID_TWINVQ,
387
    CODEC_ID_TRUEHD,
388
    CODEC_ID_MP4ALS,
389
    CODEC_ID_ATRAC1,
390
    CODEC_ID_BINKAUDIO_RDFT,
391
    CODEC_ID_BINKAUDIO_DCT,
392
    CODEC_ID_AAC_LATM,
393
    CODEC_ID_QDMC,
394

    
395
    /* subtitle codecs */
396
    CODEC_ID_DVD_SUBTITLE= 0x17000,
397
    CODEC_ID_DVB_SUBTITLE,
398
    CODEC_ID_TEXT,  ///< raw UTF-8 text
399
    CODEC_ID_XSUB,
400
    CODEC_ID_SSA,
401
    CODEC_ID_MOV_TEXT,
402
    CODEC_ID_HDMV_PGS_SUBTITLE,
403
    CODEC_ID_DVB_TELETEXT,
404
    CODEC_ID_SRT,
405

    
406
    /* other specific kind of codecs (generally used for attachments) */
407
    CODEC_ID_TTF= 0x18000,
408

    
409
    CODEC_ID_PROBE= 0x19000, ///< codec_id is not known (like CODEC_ID_NONE) but lavf should attempt to identify it
410

    
411
    CODEC_ID_MPEG2TS= 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS
412
                                * stream (only used by libavformat) */
413
    CODEC_ID_FFMETADATA=0x21000,   ///< Dummy codec for streams containing only metadata information.
414
};
415

    
416
#if LIBAVCODEC_VERSION_MAJOR < 53
417
#define CodecType AVMediaType
418

    
419
#define CODEC_TYPE_UNKNOWN    AVMEDIA_TYPE_UNKNOWN
420
#define CODEC_TYPE_VIDEO      AVMEDIA_TYPE_VIDEO
421
#define CODEC_TYPE_AUDIO      AVMEDIA_TYPE_AUDIO
422
#define CODEC_TYPE_DATA       AVMEDIA_TYPE_DATA
423
#define CODEC_TYPE_SUBTITLE   AVMEDIA_TYPE_SUBTITLE
424
#define CODEC_TYPE_ATTACHMENT AVMEDIA_TYPE_ATTACHMENT
425
#define CODEC_TYPE_NB         AVMEDIA_TYPE_NB
426
#endif
427

    
428
#if FF_API_OLD_SAMPLE_FMT
429
#define SampleFormat AVSampleFormat
430

    
431
#define SAMPLE_FMT_NONE AV_SAMPLE_FMT_NONE
432
#define SAMPLE_FMT_U8   AV_SAMPLE_FMT_U8
433
#define SAMPLE_FMT_S16  AV_SAMPLE_FMT_S16
434
#define SAMPLE_FMT_S32  AV_SAMPLE_FMT_S32
435
#define SAMPLE_FMT_FLT  AV_SAMPLE_FMT_FLT
436
#define SAMPLE_FMT_DBL  AV_SAMPLE_FMT_DBL
437
#define SAMPLE_FMT_NB   AV_SAMPLE_FMT_NB
438
#endif
439

    
440
#if FF_API_OLD_AUDIOCONVERT
441
#include "libavutil/audioconvert.h"
442

    
443
/* Audio channel masks */
444
#define CH_FRONT_LEFT            AV_CH_FRONT_LEFT
445
#define CH_FRONT_RIGHT           AV_CH_FRONT_RIGHT
446
#define CH_FRONT_CENTER          AV_CH_FRONT_CENTER
447
#define CH_LOW_FREQUENCY         AV_CH_LOW_FREQUENCY
448
#define CH_BACK_LEFT             AV_CH_BACK_LEFT
449
#define CH_BACK_RIGHT            AV_CH_BACK_RIGHT
450
#define CH_FRONT_LEFT_OF_CENTER  AV_CH_FRONT_LEFT_OF_CENTER
451
#define CH_FRONT_RIGHT_OF_CENTER AV_CH_FRONT_RIGHT_OF_CENTER
452
#define CH_BACK_CENTER           AV_CH_BACK_CENTER
453
#define CH_SIDE_LEFT             AV_CH_SIDE_LEFT
454
#define CH_SIDE_RIGHT            AV_CH_SIDE_RIGHT
455
#define CH_TOP_CENTER            AV_CH_TOP_CENTER
456
#define CH_TOP_FRONT_LEFT        AV_CH_TOP_FRONT_LEFT
457
#define CH_TOP_FRONT_CENTER      AV_CH_TOP_FRONT_CENTER
458
#define CH_TOP_FRONT_RIGHT       AV_CH_TOP_FRONT_RIGHT
459
#define CH_TOP_BACK_LEFT         AV_CH_TOP_BACK_LEFT
460
#define CH_TOP_BACK_CENTER       AV_CH_TOP_BACK_CENTER
461
#define CH_TOP_BACK_RIGHT        AV_CH_TOP_BACK_RIGHT
462
#define CH_STEREO_LEFT           AV_CH_STEREO_LEFT
463
#define CH_STEREO_RIGHT          AV_CH_STEREO_RIGHT
464

    
465
/** Channel mask value used for AVCodecContext.request_channel_layout
466
    to indicate that the user requests the channel order of the decoder output
467
    to be the native codec channel order. */
468
#define CH_LAYOUT_NATIVE         AV_CH_LAYOUT_NATIVE
469

    
470
/* Audio channel convenience macros */
471
#define CH_LAYOUT_MONO           AV_CH_LAYOUT_MONO
472
#define CH_LAYOUT_STEREO         AV_CH_LAYOUT_STEREO
473
#define CH_LAYOUT_2_1            AV_CH_LAYOUT_2_1
474
#define CH_LAYOUT_SURROUND       AV_CH_LAYOUT_SURROUND
475
#define CH_LAYOUT_4POINT0        AV_CH_LAYOUT_4POINT0
476
#define CH_LAYOUT_2_2            AV_CH_LAYOUT_2_2
477
#define CH_LAYOUT_QUAD           AV_CH_LAYOUT_QUAD
478
#define CH_LAYOUT_5POINT0        AV_CH_LAYOUT_5POINT0
479
#define CH_LAYOUT_5POINT1        AV_CH_LAYOUT_5POINT1
480
#define CH_LAYOUT_5POINT0_BACK   AV_CH_LAYOUT_5POINT0_BACK
481
#define CH_LAYOUT_5POINT1_BACK   AV_CH_LAYOUT_5POINT1_BACK
482
#define CH_LAYOUT_7POINT0        AV_CH_LAYOUT_7POINT0
483
#define CH_LAYOUT_7POINT1        AV_CH_LAYOUT_7POINT1
484
#define CH_LAYOUT_7POINT1_WIDE   AV_CH_LAYOUT_7POINT1_WIDE
485
#define CH_LAYOUT_STEREO_DOWNMIX AV_CH_LAYOUT_STEREO_DOWNMIX
486
#endif
487

    
488
/* in bytes */
489
#define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
490

    
491
/**
492
 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
493
 * This is mainly needed because some optimized bitstream readers read
494
 * 32 or 64 bit at once and could read over the end.<br>
495
 * Note: If the first 23 bits of the additional bytes are not 0, then damaged
496
 * MPEG bitstreams could cause overread and segfault.
497
 */
498
#define FF_INPUT_BUFFER_PADDING_SIZE 8
499

    
500
/**
501
 * minimum encoding buffer size
502
 * Used to avoid some checks during header writing.
503
 */
504
#define FF_MIN_BUFFER_SIZE 16384
505

    
506

    
507
/**
508
 * motion estimation type.
509
 */
510
enum Motion_Est_ID {
511
    ME_ZERO = 1,    ///< no search, that is use 0,0 vector whenever one is needed
512
    ME_FULL,
513
    ME_LOG,
514
    ME_PHODS,
515
    ME_EPZS,        ///< enhanced predictive zonal search
516
    ME_X1,          ///< reserved for experiments
517
    ME_HEX,         ///< hexagon based search
518
    ME_UMH,         ///< uneven multi-hexagon search
519
    ME_ITER,        ///< iterative search
520
    ME_TESA,        ///< transformed exhaustive search algorithm
521
};
522

    
523
enum AVDiscard{
524
    /* We leave some space between them for extensions (drop some
525
     * keyframes for intra-only or drop just some bidir frames). */
526
    AVDISCARD_NONE   =-16, ///< discard nothing
527
    AVDISCARD_DEFAULT=  0, ///< discard useless packets like 0 size packets in avi
528
    AVDISCARD_NONREF =  8, ///< discard all non reference
529
    AVDISCARD_BIDIR  = 16, ///< discard all bidirectional frames
530
    AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
531
    AVDISCARD_ALL    = 48, ///< discard all
532
};
533

    
534
enum AVColorPrimaries{
535
    AVCOL_PRI_BT709      =1, ///< also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP177 Annex B
536
    AVCOL_PRI_UNSPECIFIED=2,
537
    AVCOL_PRI_BT470M     =4,
538
    AVCOL_PRI_BT470BG    =5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM
539
    AVCOL_PRI_SMPTE170M  =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC
540
    AVCOL_PRI_SMPTE240M  =7, ///< functionally identical to above
541
    AVCOL_PRI_FILM       =8,
542
    AVCOL_PRI_NB           , ///< Not part of ABI
543
};
544

    
545
enum AVColorTransferCharacteristic{
546
    AVCOL_TRC_BT709      =1, ///< also ITU-R BT1361
547
    AVCOL_TRC_UNSPECIFIED=2,
548
    AVCOL_TRC_GAMMA22    =4, ///< also ITU-R BT470M / ITU-R BT1700 625 PAL & SECAM
549
    AVCOL_TRC_GAMMA28    =5, ///< also ITU-R BT470BG
550
    AVCOL_TRC_NB           , ///< Not part of ABI
551
};
552

    
553
enum AVColorSpace{
554
    AVCOL_SPC_RGB        =0,
555
    AVCOL_SPC_BT709      =1, ///< also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
556
    AVCOL_SPC_UNSPECIFIED=2,
557
    AVCOL_SPC_FCC        =4,
558
    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
559
    AVCOL_SPC_SMPTE170M  =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC / functionally identical to above
560
    AVCOL_SPC_SMPTE240M  =7,
561
    AVCOL_SPC_NB           , ///< Not part of ABI
562
};
563

    
564
enum AVColorRange{
565
    AVCOL_RANGE_UNSPECIFIED=0,
566
    AVCOL_RANGE_MPEG       =1, ///< the normal 219*2^(n-8) "MPEG" YUV ranges
567
    AVCOL_RANGE_JPEG       =2, ///< the normal     2^n-1   "JPEG" YUV ranges
568
    AVCOL_RANGE_NB           , ///< Not part of ABI
569
};
570

    
571
/**
572
 *  X   X      3 4 X      X are luma samples,
573
 *             1 2        1-6 are possible chroma positions
574
 *  X   X      5 6 X      0 is undefined/unknown position
575
 */
576
enum AVChromaLocation{
577
    AVCHROMA_LOC_UNSPECIFIED=0,
578
    AVCHROMA_LOC_LEFT       =1, ///< mpeg2/4, h264 default
579
    AVCHROMA_LOC_CENTER     =2, ///< mpeg1, jpeg, h263
580
    AVCHROMA_LOC_TOPLEFT    =3, ///< DV
581
    AVCHROMA_LOC_TOP        =4,
582
    AVCHROMA_LOC_BOTTOMLEFT =5,
583
    AVCHROMA_LOC_BOTTOM     =6,
584
    AVCHROMA_LOC_NB           , ///< Not part of ABI
585
};
586

    
587
/**
588
 * LPC analysis type
589
 */
590
enum AVLPCType {
591
    AV_LPC_TYPE_DEFAULT     = -1, ///< use the codec default LPC type
592
    AV_LPC_TYPE_NONE        =  0, ///< do not use LPC prediction or use all zero coefficients
593
    AV_LPC_TYPE_FIXED       =  1, ///< fixed LPC coefficients
594
    AV_LPC_TYPE_LEVINSON    =  2, ///< Levinson-Durbin recursion
595
    AV_LPC_TYPE_CHOLESKY    =  3, ///< Cholesky factorization
596
    AV_LPC_TYPE_NB              , ///< Not part of ABI
597
};
598

    
599
typedef struct RcOverride{
600
    int start_frame;
601
    int end_frame;
602
    int qscale; // If this is 0 then quality_factor will be used instead.
603
    float quality_factor;
604
} RcOverride;
605

    
606
#define FF_MAX_B_FRAMES 16
607

    
608
/* encoding support
609
   These flags can be passed in AVCodecContext.flags before initialization.
610
   Note: Not everything is supported yet.
611
*/
612

    
613
#define CODEC_FLAG_QSCALE 0x0002  ///< Use fixed qscale.
614
#define CODEC_FLAG_4MV    0x0004  ///< 4 MV per MB allowed / advanced prediction for H.263.
615
#define CODEC_FLAG_QPEL   0x0010  ///< Use qpel MC.
616
#define CODEC_FLAG_GMC    0x0020  ///< Use GMC.
617
#define CODEC_FLAG_MV0    0x0040  ///< Always try a MB with MV=<0,0>.
618
#define CODEC_FLAG_PART   0x0080  ///< Use data partitioning.
619
/**
620
 * The parent program guarantees that the input for B-frames containing
621
 * streams is not written to for at least s->max_b_frames+1 frames, if
622
 * this is not set the input will be copied.
623
 */
624
#define CODEC_FLAG_INPUT_PRESERVED 0x0100
625
#define CODEC_FLAG_PASS1           0x0200   ///< Use internal 2pass ratecontrol in first pass mode.
626
#define CODEC_FLAG_PASS2           0x0400   ///< Use internal 2pass ratecontrol in second pass mode.
627
#define CODEC_FLAG_EXTERN_HUFF     0x1000   ///< Use external Huffman table (for MJPEG).
628
#define CODEC_FLAG_GRAY            0x2000   ///< Only decode/encode grayscale.
629
#define CODEC_FLAG_EMU_EDGE        0x4000   ///< Don't draw edges.
630
#define CODEC_FLAG_PSNR            0x8000   ///< error[?] variables will be set during encoding.
631
#define CODEC_FLAG_TRUNCATED       0x00010000 /** Input bitstream might be truncated at a random
632
                                                  location instead of only at frame boundaries. */
633
#define CODEC_FLAG_NORMALIZE_AQP  0x00020000 ///< Normalize adaptive quantization.
634
#define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT.
635
#define CODEC_FLAG_LOW_DELAY      0x00080000 ///< Force low delay.
636
#define CODEC_FLAG_ALT_SCAN       0x00100000 ///< Use alternate scan.
637
#define CODEC_FLAG_GLOBAL_HEADER  0x00400000 ///< Place global headers in extradata instead of every keyframe.
638
#define CODEC_FLAG_BITEXACT       0x00800000 ///< Use only bitexact stuff (except (I)DCT).
639
/* Fx : Flag for h263+ extra options */
640
#define CODEC_FLAG_AC_PRED        0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction
641
#define CODEC_FLAG_H263P_UMV      0x02000000 ///< unlimited motion vector
642
#define CODEC_FLAG_CBP_RD         0x04000000 ///< Use rate distortion optimization for cbp.
643
#define CODEC_FLAG_QP_RD          0x08000000 ///< Use rate distortion optimization for qp selectioon.
644
#define CODEC_FLAG_H263P_AIV      0x00000008 ///< H.263 alternative inter VLC
645
#define CODEC_FLAG_OBMC           0x00000001 ///< OBMC
646
#define CODEC_FLAG_LOOP_FILTER    0x00000800 ///< loop filter
647
#define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
648
#define CODEC_FLAG_INTERLACED_ME  0x20000000 ///< interlaced motion estimation
649
#define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< Will reserve space for SVCD scan offset user data.
650
#define CODEC_FLAG_CLOSED_GOP     0x80000000
651
#define CODEC_FLAG2_FAST          0x00000001 ///< Allow non spec compliant speedup tricks.
652
#define CODEC_FLAG2_STRICT_GOP    0x00000002 ///< Strictly enforce GOP size.
653
#define CODEC_FLAG2_NO_OUTPUT     0x00000004 ///< Skip bitstream encoding.
654
#define CODEC_FLAG2_LOCAL_HEADER  0x00000008 ///< Place global headers at every keyframe instead of in extradata.
655
#define CODEC_FLAG2_BPYRAMID      0x00000010 ///< H.264 allow B-frames to be used as references.
656
#define CODEC_FLAG2_WPRED         0x00000020 ///< H.264 weighted biprediction for B-frames
657
#define CODEC_FLAG2_MIXED_REFS    0x00000040 ///< H.264 one reference per partition, as opposed to one reference per macroblock
658
#define CODEC_FLAG2_8X8DCT        0x00000080 ///< H.264 high profile 8x8 transform
659
#define CODEC_FLAG2_FASTPSKIP     0x00000100 ///< H.264 fast pskip
660
#define CODEC_FLAG2_AUD           0x00000200 ///< H.264 access unit delimiters
661
#define CODEC_FLAG2_BRDO          0x00000400 ///< B-frame rate-distortion optimization
662
#define CODEC_FLAG2_INTRA_VLC     0x00000800 ///< Use MPEG-2 intra VLC table.
663
#define CODEC_FLAG2_MEMC_ONLY     0x00001000 ///< Only do ME/MC (I frames -> ref, P frame -> ME+MC).
664
#define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format.
665
#define CODEC_FLAG2_SKIP_RD       0x00004000 ///< RD optimal MB level residual skipping
666
#define CODEC_FLAG2_CHUNKS        0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
667
#define CODEC_FLAG2_NON_LINEAR_QUANT 0x00010000 ///< Use MPEG-2 nonlinear quantizer.
668
#define CODEC_FLAG2_BIT_RESERVOIR 0x00020000 ///< Use a bit reservoir when encoding if possible
669
#define CODEC_FLAG2_MBTREE        0x00040000 ///< Use macroblock tree ratecontrol (x264 only)
670
#define CODEC_FLAG2_PSY           0x00080000 ///< Use psycho visual optimizations.
671
#define CODEC_FLAG2_SSIM          0x00100000 ///< Compute SSIM during encoding, error[] values are undefined.
672
#define CODEC_FLAG2_INTRA_REFRESH 0x00200000 ///< Use periodic insertion of intra blocks instead of keyframes.
673

    
674
/* Unsupported options :
675
 *              Syntax Arithmetic coding (SAC)
676
 *              Reference Picture Selection
677
 *              Independent Segment Decoding */
678
/* /Fx */
679
/* codec capabilities */
680

    
681
#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback.
682
/**
683
 * Codec uses get_buffer() for allocating buffers and supports custom allocators.
684
 * If not set, it might not use get_buffer() at all or use operations that
685
 * assume the buffer was allocated by avcodec_default_get_buffer.
686
 */
687
#define CODEC_CAP_DR1             0x0002
688
/* If 'parse_only' field is true, then avcodec_parse_frame() can be used. */
689
#define CODEC_CAP_PARSE_ONLY      0x0004
690
#define CODEC_CAP_TRUNCATED       0x0008
691
/* Codec can export data for HW decoding (XvMC). */
692
#define CODEC_CAP_HWACCEL         0x0010
693
/**
694
 * Codec has a nonzero delay and needs to be fed with NULL at the end to get the delayed data.
695
 * If this is not set, the codec is guaranteed to never be fed with NULL data.
696
 */
697
#define CODEC_CAP_DELAY           0x0020
698
/**
699
 * Codec can be fed a final frame with a smaller size.
700
 * This can be used to prevent truncation of the last audio samples.
701
 */
702
#define CODEC_CAP_SMALL_LAST_FRAME 0x0040
703
/**
704
 * Codec can export data for HW decoding (VDPAU).
705
 */
706
#define CODEC_CAP_HWACCEL_VDPAU    0x0080
707
/**
708
 * Codec can output multiple frames per AVPacket
709
 * Normally demuxers return one frame at a time, demuxers which do not do
710
 * are connected to a parser to split what they return into proper frames.
711
 * This flag is reserved to the very rare category of codecs which have a
712
 * bitstream that cannot be split into frames without timeconsuming
713
 * operations like full decoding. Demuxers carring such bitstreams thus
714
 * may return multiple frames in a packet. This has many disadvantages like
715
 * prohibiting stream copy in many cases thus it should only be considered
716
 * as a last resort.
717
 */
718
#define CODEC_CAP_SUBFRAMES        0x0100
719
/**
720
 * Codec is experimental and is thus avoided in favor of non experimental
721
 * encoders
722
 */
723
#define CODEC_CAP_EXPERIMENTAL     0x0200
724
/**
725
 * Codec should fill in channel configuration and samplerate instead of container
726
 */
727
#define CODEC_CAP_CHANNEL_CONF     0x0400
728
/**
729
 * Codec is able to deal with negative linesizes
730
 */
731
#define CODEC_CAP_NEG_LINESIZES    0x0800
732
/**
733
 * Codec supports frame-level multithreading.
734
 */
735
#define CODEC_CAP_FRAME_THREADS    0x1000
736

    
737
//The following defines may change, don't expect compatibility if you use them.
738
#define MB_TYPE_INTRA4x4   0x0001
739
#define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
740
#define MB_TYPE_INTRA_PCM  0x0004 //FIXME H.264-specific
741
#define MB_TYPE_16x16      0x0008
742
#define MB_TYPE_16x8       0x0010
743
#define MB_TYPE_8x16       0x0020
744
#define MB_TYPE_8x8        0x0040
745
#define MB_TYPE_INTERLACED 0x0080
746
#define MB_TYPE_DIRECT2    0x0100 //FIXME
747
#define MB_TYPE_ACPRED     0x0200
748
#define MB_TYPE_GMC        0x0400
749
#define MB_TYPE_SKIP       0x0800
750
#define MB_TYPE_P0L0       0x1000
751
#define MB_TYPE_P1L0       0x2000
752
#define MB_TYPE_P0L1       0x4000
753
#define MB_TYPE_P1L1       0x8000
754
#define MB_TYPE_L0         (MB_TYPE_P0L0 | MB_TYPE_P1L0)
755
#define MB_TYPE_L1         (MB_TYPE_P0L1 | MB_TYPE_P1L1)
756
#define MB_TYPE_L0L1       (MB_TYPE_L0   | MB_TYPE_L1)
757
#define MB_TYPE_QUANT      0x00010000
758
#define MB_TYPE_CBP        0x00020000
759
//Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
760

    
761
/**
762
 * Pan Scan area.
763
 * This specifies the area which should be displayed.
764
 * Note there may be multiple such areas for one frame.
765
 */
766
typedef struct AVPanScan{
767
    /**
768
     * id
769
     * - encoding: Set by user.
770
     * - decoding: Set by libavcodec.
771
     */
772
    int id;
773

    
774
    /**
775
     * width and height in 1/16 pel
776
     * - encoding: Set by user.
777
     * - decoding: Set by libavcodec.
778
     */
779
    int width;
780
    int height;
781

    
782
    /**
783
     * position of the top left corner in 1/16 pel for up to 3 fields/frames
784
     * - encoding: Set by user.
785
     * - decoding: Set by libavcodec.
786
     */
787
    int16_t position[3][2];
788
}AVPanScan;
789

    
790
#define FF_COMMON_FRAME \
791
    /**\
792
     * pointer to the picture planes.\
793
     * This might be different from the first allocated byte\
794
     * - encoding: \
795
     * - decoding: \
796
     */\
797
    uint8_t *data[4];\
798
    int linesize[4];\
799
    /**\
800
     * pointer to the first allocated byte of the picture. Can be used in get_buffer/release_buffer.\
801
     * This isn't used by libavcodec unless the default get/release_buffer() is used.\
802
     * - encoding: \
803
     * - decoding: \
804
     */\
805
    uint8_t *base[4];\
806
    /**\
807
     * 1 -> keyframe, 0-> not\
808
     * - encoding: Set by libavcodec.\
809
     * - decoding: Set by libavcodec.\
810
     */\
811
    int key_frame;\
812
\
813
    /**\
814
     * Picture type of the frame, see ?_TYPE below.\
815
     * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
816
     * - decoding: Set by libavcodec.\
817
     */\
818
    int pict_type;\
819
\
820
    /**\
821
     * presentation timestamp in time_base units (time when frame should be shown to user)\
822
     * If AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed.\
823
     * - encoding: MUST be set by user.\
824
     * - decoding: Set by libavcodec.\
825
     */\
826
    int64_t pts;\
827
\
828
    /**\
829
     * picture number in bitstream order\
830
     * - encoding: set by\
831
     * - decoding: Set by libavcodec.\
832
     */\
833
    int coded_picture_number;\
834
    /**\
835
     * picture number in display order\
836
     * - encoding: set by\
837
     * - decoding: Set by libavcodec.\
838
     */\
839
    int display_picture_number;\
840
\
841
    /**\
842
     * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
843
     * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
844
     * - decoding: Set by libavcodec.\
845
     */\
846
    int quality; \
847
\
848
    /**\
849
     * buffer age (1->was last buffer and dint change, 2->..., ...).\
850
     * Set to INT_MAX if the buffer has not been used yet.\
851
     * - encoding: unused\
852
     * - decoding: MUST be set by get_buffer().\
853
     */\
854
    int age;\
855
\
856
    /**\
857
     * is this picture used as reference\
858
     * The values for this are the same as the MpegEncContext.picture_structure\
859
     * variable, that is 1->top field, 2->bottom field, 3->frame/both fields.\
860
     * Set to 4 for delayed, non-reference frames.\
861
     * - encoding: unused\
862
     * - decoding: Set by libavcodec. (before get_buffer() call)).\
863
     */\
864
    int reference;\
865
\
866
    /**\
867
     * QP table\
868
     * - encoding: unused\
869
     * - decoding: Set by libavcodec.\
870
     */\
871
    int8_t *qscale_table;\
872
    /**\
873
     * QP store stride\
874
     * - encoding: unused\
875
     * - decoding: Set by libavcodec.\
876
     */\
877
    int qstride;\
878
\
879
    /**\
880
     * mbskip_table[mb]>=1 if MB didn't change\
881
     * stride= mb_width = (width+15)>>4\
882
     * - encoding: unused\
883
     * - decoding: Set by libavcodec.\
884
     */\
885
    uint8_t *mbskip_table;\
886
\
887
    /**\
888
     * motion vector table\
889
     * @code\
890
     * example:\
891
     * int mv_sample_log2= 4 - motion_subsample_log2;\
892
     * int mb_width= (width+15)>>4;\
893
     * int mv_stride= (mb_width << mv_sample_log2) + 1;\
894
     * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
895
     * @endcode\
896
     * - encoding: Set by user.\
897
     * - decoding: Set by libavcodec.\
898
     */\
899
    int16_t (*motion_val[2])[2];\
900
\
901
    /**\
902
     * macroblock type table\
903
     * mb_type_base + mb_width + 2\
904
     * - encoding: Set by user.\
905
     * - decoding: Set by libavcodec.\
906
     */\
907
    uint32_t *mb_type;\
908
\
909
    /**\
910
     * log2 of the size of the block which a single vector in motion_val represents: \
911
     * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
912
     * - encoding: unused\
913
     * - decoding: Set by libavcodec.\
914
     */\
915
    uint8_t motion_subsample_log2;\
916
\
917
    /**\
918
     * for some private data of the user\
919
     * - encoding: unused\
920
     * - decoding: Set by user.\
921
     */\
922
    void *opaque;\
923
\
924
    /**\
925
     * error\
926
     * - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR.\
927
     * - decoding: unused\
928
     */\
929
    uint64_t error[4];\
930
\
931
    /**\
932
     * type of the buffer (to keep track of who has to deallocate data[*])\
933
     * - encoding: Set by the one who allocates it.\
934
     * - decoding: Set by the one who allocates it.\
935
     * Note: User allocated (direct rendering) & internal buffers cannot coexist currently.\
936
     */\
937
    int type;\
938
    \
939
    /**\
940
     * When decoding, this signals how much the picture must be delayed.\
941
     * extra_delay = repeat_pict / (2*fps)\
942
     * - encoding: unused\
943
     * - decoding: Set by libavcodec.\
944
     */\
945
    int repeat_pict;\
946
    \
947
    /**\
948
     * \
949
     */\
950
    int qscale_type;\
951
    \
952
    /**\
953
     * The content of the picture is interlaced.\
954
     * - encoding: Set by user.\
955
     * - decoding: Set by libavcodec. (default 0)\
956
     */\
957
    int interlaced_frame;\
958
    \
959
    /**\
960
     * If the content is interlaced, is top field displayed first.\
961
     * - encoding: Set by user.\
962
     * - decoding: Set by libavcodec.\
963
     */\
964
    int top_field_first;\
965
    \
966
    /**\
967
     * Pan scan.\
968
     * - encoding: Set by user.\
969
     * - decoding: Set by libavcodec.\
970
     */\
971
    AVPanScan *pan_scan;\
972
    \
973
    /**\
974
     * Tell user application that palette has changed from previous frame.\
975
     * - encoding: ??? (no palette-enabled encoder yet)\
976
     * - decoding: Set by libavcodec. (default 0).\
977
     */\
978
    int palette_has_changed;\
979
    \
980
    /**\
981
     * codec suggestion on buffer type if != 0\
982
     * - encoding: unused\
983
     * - decoding: Set by libavcodec. (before get_buffer() call)).\
984
     */\
985
    int buffer_hints;\
986
\
987
    /**\
988
     * DCT coefficients\
989
     * - encoding: unused\
990
     * - decoding: Set by libavcodec.\
991
     */\
992
    short *dct_coeff;\
993
\
994
    /**\
995
     * motion reference frame index\
996
     * the order in which these are stored can depend on the codec.\
997
     * - encoding: Set by user.\
998
     * - decoding: Set by libavcodec.\
999
     */\
1000
    int8_t *ref_index[2];\
1001
\
1002
    /**\
1003
     * reordered opaque 64bit (generally an integer or a double precision float\
1004
     * PTS but can be anything). \
1005
     * The user sets AVCodecContext.reordered_opaque to represent the input at\
1006
     * that time,\
1007
     * the decoder reorders values as needed and sets AVFrame.reordered_opaque\
1008
     * to exactly one of the values provided by the user through AVCodecContext.reordered_opaque \
1009
     * @deprecated in favor of pkt_pts\
1010
     * - encoding: unused\
1011
     * - decoding: Read by user.\
1012
     */\
1013
    int64_t reordered_opaque;\
1014
\
1015
    /**\
1016
     * hardware accelerator private data (FFmpeg allocated)\
1017
     * - encoding: unused\
1018
     * - decoding: Set by libavcodec\
1019
     */\
1020
    void *hwaccel_picture_private;\
1021
\
1022
    /**\
1023
     * reordered pts from the last AVPacket that has been input into the decoder\
1024
     * - encoding: unused\
1025
     * - decoding: Read by user.\
1026
     */\
1027
    int64_t pkt_pts;\
1028
\
1029
    /**\
1030
     * dts from the last AVPacket that has been input into the decoder\
1031
     * - encoding: unused\
1032
     * - decoding: Read by user.\
1033
     */\
1034
    int64_t pkt_dts;\
1035
\
1036
    /**\
1037
     * the AVCodecContext which ff_thread_get_buffer() was last called on\
1038
     * - encoding: Set by libavcodec.\
1039
     * - decoding: Set by libavcodec.\
1040
     */\
1041
    struct AVCodecContext *owner;\
1042
\
1043
    /**\
1044
     * used by multithreading to store frame-specific info\
1045
     * - encoding: Set by libavcodec.\
1046
     * - decoding: Set by libavcodec.\
1047
     */\
1048
    void *thread_opaque;\
1049
\
1050
    /**\
1051
     * frame timestamp estimated using various heuristics, in stream time base\
1052
     * - encoding: unused\
1053
     * - decoding: set by libavcodec, read by user.\
1054
     */\
1055
    int64_t best_effort_timestamp;\
1056

    
1057

    
1058
#define FF_QSCALE_TYPE_MPEG1 0
1059
#define FF_QSCALE_TYPE_MPEG2 1
1060
#define FF_QSCALE_TYPE_H264  2
1061
#define FF_QSCALE_TYPE_VP56  3
1062

    
1063
#define FF_BUFFER_TYPE_INTERNAL 1
1064
#define FF_BUFFER_TYPE_USER     2 ///< direct rendering buffers (image is (de)allocated by user)
1065
#define FF_BUFFER_TYPE_SHARED   4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared.
1066
#define FF_BUFFER_TYPE_COPY     8 ///< Just a (modified) copy of some other buffer, don't deallocate anything.
1067

    
1068

    
1069
#define FF_I_TYPE  1 ///< Intra
1070
#define FF_P_TYPE  2 ///< Predicted
1071
#define FF_B_TYPE  3 ///< Bi-dir predicted
1072
#define FF_S_TYPE  4 ///< S(GMC)-VOP MPEG4
1073
#define FF_SI_TYPE 5 ///< Switching Intra
1074
#define FF_SP_TYPE 6 ///< Switching Predicted
1075
#define FF_BI_TYPE 7
1076

    
1077
#define FF_BUFFER_HINTS_VALID    0x01 // Buffer hints value is meaningful (if 0 ignore).
1078
#define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer.
1079
#define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content.
1080
#define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update).
1081

    
1082
typedef struct AVPacket {
1083
    /**
1084
     * Presentation timestamp in AVStream->time_base units; the time at which
1085
     * the decompressed packet will be presented to the user.
1086
     * Can be AV_NOPTS_VALUE if it is not stored in the file.
1087
     * pts MUST be larger or equal to dts as presentation cannot happen before
1088
     * decompression, unless one wants to view hex dumps. Some formats misuse
1089
     * the terms dts and pts/cts to mean something different. Such timestamps
1090
     * must be converted to true pts/dts before they are stored in AVPacket.
1091
     */
1092
    int64_t pts;
1093
    /**
1094
     * Decompression timestamp in AVStream->time_base units; the time at which
1095
     * the packet is decompressed.
1096
     * Can be AV_NOPTS_VALUE if it is not stored in the file.
1097
     */
1098
    int64_t dts;
1099
    uint8_t *data;
1100
    int   size;
1101
    int   stream_index;
1102
    int   flags;
1103
    /**
1104
     * Duration of this packet in AVStream->time_base units, 0 if unknown.
1105
     * Equals next_pts - this_pts in presentation order.
1106
     */
1107
    int   duration;
1108
    void  (*destruct)(struct AVPacket *);
1109
    void  *priv;
1110
    int64_t pos;                            ///< byte position in stream, -1 if unknown
1111

    
1112
    /**
1113
     * Time difference in AVStream->time_base units from the pts of this
1114
     * packet to the point at which the output from the decoder has converged
1115
     * independent from the availability of previous frames. That is, the
1116
     * frames are virtually identical no matter if decoding started from
1117
     * the very first frame or from this keyframe.
1118
     * Is AV_NOPTS_VALUE if unknown.
1119
     * This field is not the display duration of the current packet.
1120
     * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
1121
     * set.
1122
     *
1123
     * The purpose of this field is to allow seeking in streams that have no
1124
     * keyframes in the conventional sense. It corresponds to the
1125
     * recovery point SEI in H.264 and match_time_delta in NUT. It is also
1126
     * essential for some types of subtitle streams to ensure that all
1127
     * subtitles are correctly displayed after seeking.
1128
     */
1129
    int64_t convergence_duration;
1130
} AVPacket;
1131
#define AV_PKT_FLAG_KEY   0x0001
1132
#if LIBAVCODEC_VERSION_MAJOR < 53
1133
#define PKT_FLAG_KEY AV_PKT_FLAG_KEY
1134
#endif
1135

    
1136
/**
1137
 * Audio Video Frame.
1138
 * New fields can be added to the end of FF_COMMON_FRAME with minor version
1139
 * bumps.
1140
 * Removal, reordering and changes to existing fields require a major
1141
 * version bump. No fields should be added into AVFrame before or after
1142
 * FF_COMMON_FRAME!
1143
 * sizeof(AVFrame) must not be used outside libav*.
1144
 */
1145
typedef struct AVFrame {
1146
    FF_COMMON_FRAME
1147
} AVFrame;
1148

    
1149
/**
1150
 * main external API structure.
1151
 * New fields can be added to the end with minor version bumps.
1152
 * Removal, reordering and changes to existing fields require a major
1153
 * version bump.
1154
 * sizeof(AVCodecContext) must not be used outside libav*.
1155
 */
1156
typedef struct AVCodecContext {
1157
    /**
1158
     * information on struct for av_log
1159
     * - set by avcodec_alloc_context
1160
     */
1161
    const AVClass *av_class;
1162
    /**
1163
     * the average bitrate
1164
     * - encoding: Set by user; unused for constant quantizer encoding.
1165
     * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.
1166
     */
1167
    int bit_rate;
1168

    
1169
    /**
1170
     * number of bits the bitstream is allowed to diverge from the reference.
1171
     *           the reference can be CBR (for CBR pass1) or VBR (for pass2)
1172
     * - encoding: Set by user; unused for constant quantizer encoding.
1173
     * - decoding: unused
1174
     */
1175
    int bit_rate_tolerance;
1176

    
1177
    /**
1178
     * CODEC_FLAG_*.
1179
     * - encoding: Set by user.
1180
     * - decoding: Set by user.
1181
     */
1182
    int flags;
1183

    
1184
    /**
1185
     * Some codecs need additional format info. It is stored here.
1186
     * If any muxer uses this then ALL demuxers/parsers AND encoders for the
1187
     * specific codec MUST set it correctly otherwise stream copy breaks.
1188
     * In general use of this field by muxers is not recommanded.
1189
     * - encoding: Set by libavcodec.
1190
     * - decoding: Set by libavcodec. (FIXME: Is this OK?)
1191
     */
1192
    int sub_id;
1193

    
1194
    /**
1195
     * Motion estimation algorithm used for video coding.
1196
     * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
1197
     * 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific]
1198
     * - encoding: MUST be set by user.
1199
     * - decoding: unused
1200
     */
1201
    int me_method;
1202

    
1203
    /**
1204
     * some codecs need / can use extradata like Huffman tables.
1205
     * mjpeg: Huffman tables
1206
     * rv10: additional flags
1207
     * mpeg4: global headers (they can be in the bitstream or here)
1208
     * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
1209
     * than extradata_size to avoid prolems if it is read with the bitstream reader.
1210
     * The bytewise contents of extradata must not depend on the architecture or CPU endianness.
1211
     * - encoding: Set/allocated/freed by libavcodec.
1212
     * - decoding: Set/allocated/freed by user.
1213
     */
1214
    uint8_t *extradata;
1215
    int extradata_size;
1216

    
1217
    /**
1218
     * This is the fundamental unit of time (in seconds) in terms
1219
     * of which frame timestamps are represented. For fixed-fps content,
1220
     * timebase should be 1/framerate and timestamp increments should be
1221
     * identically 1.
1222
     * - encoding: MUST be set by user.
1223
     * - decoding: Set by libavcodec.
1224
     */
1225
    AVRational time_base;
1226

    
1227
    /* video only */
1228
    /**
1229
     * picture width / height.
1230
     * - encoding: MUST be set by user.
1231
     * - decoding: Set by libavcodec.
1232
     * Note: For compatibility it is possible to set this instead of
1233
     * coded_width/height before decoding.
1234
     */
1235
    int width, height;
1236

    
1237
#define FF_ASPECT_EXTENDED 15
1238

    
1239
    /**
1240
     * the number of pictures in a group of pictures, or 0 for intra_only
1241
     * - encoding: Set by user.
1242
     * - decoding: unused
1243
     */
1244
    int gop_size;
1245

    
1246
    /**
1247
     * Pixel format, see PIX_FMT_xxx.
1248
     * May be set by the demuxer if known from headers.
1249
     * May be overriden by the decoder if it knows better.
1250
     * - encoding: Set by user.
1251
     * - decoding: Set by user if known, overridden by libavcodec if known
1252
     */
1253
    enum PixelFormat pix_fmt;
1254

    
1255
    /**
1256
     * Frame rate emulation. If not zero, the lower layer (i.e. format handler)
1257
     * has to read frames at native frame rate.
1258
     * - encoding: Set by user.
1259
     * - decoding: unused
1260
     */
1261
    int rate_emu;
1262

    
1263
    /**
1264
     * If non NULL, 'draw_horiz_band' is called by the libavcodec
1265
     * decoder to draw a horizontal band. It improves cache usage. Not
1266
     * all codecs can do that. You must check the codec capabilities
1267
     * beforehand.
1268
     * When multithreading is used, it may be called from multiple threads
1269
     * at the same time; threads might draw different parts of the same AVFrame,
1270
     * or multiple AVFrames, and there is no guarantee that slices will be drawn
1271
     * in order.
1272
     * The function is also used by hardware acceleration APIs.
1273
     * It is called at least once during frame decoding to pass
1274
     * the data needed for hardware render.
1275
     * In that mode instead of pixel data, AVFrame points to
1276
     * a structure specific to the acceleration API. The application
1277
     * reads the structure and can change some fields to indicate progress
1278
     * or mark state.
1279
     * - encoding: unused
1280
     * - decoding: Set by user.
1281
     * @param height the height of the slice
1282
     * @param y the y position of the slice
1283
     * @param type 1->top field, 2->bottom field, 3->frame
1284
     * @param offset offset into the AVFrame.data from which the slice should be read
1285
     */
1286
    void (*draw_horiz_band)(struct AVCodecContext *s,
1287
                            const AVFrame *src, int offset[4],
1288
                            int y, int type, int height);
1289

    
1290
    /* audio only */
1291
    int sample_rate; ///< samples per second
1292
    int channels;    ///< number of audio channels
1293

    
1294
    /**
1295
     * audio sample format
1296
     * - encoding: Set by user.
1297
     * - decoding: Set by libavcodec.
1298
     */
1299
    enum AVSampleFormat sample_fmt;  ///< sample format
1300

    
1301
    /* The following data should not be initialized. */
1302
    /**
1303
     * Samples per packet, initialized when calling 'init'.
1304
     */
1305
    int frame_size;
1306
    int frame_number;   ///< audio or video frame number
1307
#if LIBAVCODEC_VERSION_MAJOR < 53
1308
    int real_pict_num;  ///< Returns the real picture number of previous encoded frame.
1309
#endif
1310

    
1311
    /**
1312
     * Number of frames the decoded output will be delayed relative to
1313
     * the encoded input.
1314
     * - encoding: Set by libavcodec.
1315
     * - decoding: unused
1316
     */
1317
    int delay;
1318

    
1319
    /* - encoding parameters */
1320
    float qcompress;  ///< amount of qscale change between easy & hard scenes (0.0-1.0)
1321
    float qblur;      ///< amount of qscale smoothing over time (0.0-1.0)
1322

    
1323
    /**
1324
     * minimum quantizer
1325
     * - encoding: Set by user.
1326
     * - decoding: unused
1327
     */
1328
    int qmin;
1329

    
1330
    /**
1331
     * maximum quantizer
1332
     * - encoding: Set by user.
1333
     * - decoding: unused
1334
     */
1335
    int qmax;
1336

    
1337
    /**
1338
     * maximum quantizer difference between frames
1339
     * - encoding: Set by user.
1340
     * - decoding: unused
1341
     */
1342
    int max_qdiff;
1343

    
1344
    /**
1345
     * maximum number of B-frames between non-B-frames
1346
     * Note: The output will be delayed by max_b_frames+1 relative to the input.
1347
     * - encoding: Set by user.
1348
     * - decoding: unused
1349
     */
1350
    int max_b_frames;
1351

    
1352
    /**
1353
     * qscale factor between IP and B-frames
1354
     * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
1355
     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1356
     * - encoding: Set by user.
1357
     * - decoding: unused
1358
     */
1359
    float b_quant_factor;
1360

    
1361
    /** obsolete FIXME remove */
1362
    int rc_strategy;
1363
#define FF_RC_STRATEGY_XVID 1
1364

    
1365
    int b_frame_strategy;
1366

    
1367
    /**
1368
     * hurry up amount
1369
     * - encoding: unused
1370
     * - decoding: Set by user. 1-> Skip B-frames, 2-> Skip IDCT/dequant too, 5-> Skip everything except header
1371
     * @deprecated Deprecated in favor of skip_idct and skip_frame.
1372
     */
1373
    int hurry_up;
1374

    
1375
    struct AVCodec *codec;
1376

    
1377
    void *priv_data;
1378

    
1379
    int rtp_payload_size;   /* The size of the RTP payload: the coder will  */
1380
                            /* do its best to deliver a chunk with size     */
1381
                            /* below rtp_payload_size, the chunk will start */
1382
                            /* with a start code on some codecs like H.263. */
1383
                            /* This doesn't take account of any particular  */
1384
                            /* headers inside the transmitted RTP payload.  */
1385

    
1386

    
1387
    /* The RTP callback: This function is called    */
1388
    /* every time the encoder has a packet to send. */
1389
    /* It depends on the encoder if the data starts */
1390
    /* with a Start Code (it should). H.263 does.   */
1391
    /* mb_nb contains the number of macroblocks     */
1392
    /* encoded in the RTP payload.                  */
1393
    void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
1394

    
1395
    /* statistics, used for 2-pass encoding */
1396
    int mv_bits;
1397
    int header_bits;
1398
    int i_tex_bits;
1399
    int p_tex_bits;
1400
    int i_count;
1401
    int p_count;
1402
    int skip_count;
1403
    int misc_bits;
1404

    
1405
    /**
1406
     * number of bits used for the previously encoded frame
1407
     * - encoding: Set by libavcodec.
1408
     * - decoding: unused
1409
     */
1410
    int frame_bits;
1411

    
1412
    /**
1413
     * Private data of the user, can be used to carry app specific stuff.
1414
     * - encoding: Set by user.
1415
     * - decoding: Set by user.
1416
     */
1417
    void *opaque;
1418

    
1419
    char codec_name[32];
1420
    enum AVMediaType codec_type; /* see AVMEDIA_TYPE_xxx */
1421
    enum CodecID codec_id; /* see CODEC_ID_xxx */
1422

    
1423
    /**
1424
     * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1425
     * This is used to work around some encoder bugs.
1426
     * A demuxer should set this to what is stored in the field used to identify the codec.
1427
     * If there are multiple such fields in a container then the demuxer should choose the one
1428
     * which maximizes the information about the used codec.
1429
     * If the codec tag field in a container is larger then 32 bits then the demuxer should
1430
     * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
1431
     * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
1432
     * first.
1433
     * - encoding: Set by user, if not then the default based on codec_id will be used.
1434
     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1435
     */
1436
    unsigned int codec_tag;
1437

    
1438
    /**
1439
     * Work around bugs in encoders which sometimes cannot be detected automatically.
1440
     * - encoding: Set by user
1441
     * - decoding: Set by user
1442
     */
1443
    int workaround_bugs;
1444
#define FF_BUG_AUTODETECT       1  ///< autodetection
1445
#define FF_BUG_OLD_MSMPEG4      2
1446
#define FF_BUG_XVID_ILACE       4
1447
#define FF_BUG_UMP4             8
1448
#define FF_BUG_NO_PADDING       16
1449
#define FF_BUG_AMV              32
1450
#define FF_BUG_AC_VLC           0  ///< Will be removed, libavcodec can now handle these non-compliant files by default.
1451
#define FF_BUG_QPEL_CHROMA      64
1452
#define FF_BUG_STD_QPEL         128
1453
#define FF_BUG_QPEL_CHROMA2     256
1454
#define FF_BUG_DIRECT_BLOCKSIZE 512
1455
#define FF_BUG_EDGE             1024
1456
#define FF_BUG_HPEL_CHROMA      2048
1457
#define FF_BUG_DC_CLIP          4096
1458
#define FF_BUG_MS               8192 ///< Work around various bugs in Microsoft's broken decoders.
1459
#define FF_BUG_TRUNCATED       16384
1460
//#define FF_BUG_FAKE_SCALABILITY 16 //Autodetection should work 100%.
1461

    
1462
    /**
1463
     * luma single coefficient elimination threshold
1464
     * - encoding: Set by user.
1465
     * - decoding: unused
1466
     */
1467
    int luma_elim_threshold;
1468

    
1469
    /**
1470
     * chroma single coeff elimination threshold
1471
     * - encoding: Set by user.
1472
     * - decoding: unused
1473
     */
1474
    int chroma_elim_threshold;
1475

    
1476
    /**
1477
     * strictly follow the standard (MPEG4, ...).
1478
     * - encoding: Set by user.
1479
     * - decoding: Set by user.
1480
     * Setting this to STRICT or higher means the encoder and decoder will
1481
     * generally do stupid things, whereas setting it to unofficial or lower
1482
     * will mean the encoder might produce output that is not supported by all
1483
     * spec-compliant decoders. Decoders don't differentiate between normal,
1484
     * unofficial and experimental (that is, they always try to decode things
1485
     * when they can) unless they are explicitly asked to behave stupidly
1486
     * (=strictly conform to the specs)
1487
     */
1488
    int strict_std_compliance;
1489
#define FF_COMPLIANCE_VERY_STRICT   2 ///< Strictly conform to an older more strict version of the spec or reference software.
1490
#define FF_COMPLIANCE_STRICT        1 ///< Strictly conform to all the things in the spec no matter what consequences.
1491
#define FF_COMPLIANCE_NORMAL        0
1492
#if FF_API_INOFFICIAL
1493
#define FF_COMPLIANCE_INOFFICIAL   -1 ///< Allow inofficial extensions (deprecated - use FF_COMPLIANCE_UNOFFICIAL instead).
1494
#endif
1495
#define FF_COMPLIANCE_UNOFFICIAL   -1 ///< Allow unofficial extensions
1496
#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
1497

    
1498
    /**
1499
     * qscale offset between IP and B-frames
1500
     * - encoding: Set by user.
1501
     * - decoding: unused
1502
     */
1503
    float b_quant_offset;
1504

    
1505
    /**
1506
     * Error recognization; higher values will detect more errors but may
1507
     * misdetect some more or less valid parts as errors.
1508
     * - encoding: unused
1509
     * - decoding: Set by user.
1510
     */
1511
    int error_recognition;
1512
#define FF_ER_CAREFUL         1
1513
#define FF_ER_COMPLIANT       2
1514
#define FF_ER_AGGRESSIVE      3
1515
#define FF_ER_VERY_AGGRESSIVE 4
1516

    
1517
    /**
1518
     * Called at the beginning of each frame to get a buffer for it.
1519
     * If pic.reference is set then the frame will be read later by libavcodec.
1520
     * avcodec_align_dimensions2() should be used to find the required width and
1521
     * height, as they normally need to be rounded up to the next multiple of 16.
1522
     * if CODEC_CAP_DR1 is not set then get_buffer() must call
1523
     * avcodec_default_get_buffer() instead of providing buffers allocated by
1524
     * some other means.
1525
     * If frame multithreading is used and thread_safe_callbacks is set,
1526
     * it may be called from a different thread, but not from more than one at once.
1527
     * Does not need to be reentrant.
1528
     * - encoding: unused
1529
     * - decoding: Set by libavcodec, user can override.
1530
     */
1531
    int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1532

    
1533
    /**
1534
     * Called to release buffers which were allocated with get_buffer.
1535
     * A released buffer can be reused in get_buffer().
1536
     * pic.data[*] must be set to NULL.
1537
     * May be called from a different thread if frame multithreading is used,
1538
     * but not by more than one thread at once, so does not need to be reentrant.
1539
     * - encoding: unused
1540
     * - decoding: Set by libavcodec, user can override.
1541
     */
1542
    void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1543

    
1544
    /**
1545
     * Size of the frame reordering buffer in the decoder.
1546
     * For MPEG-2 it is 1 IPB or 0 low delay IP.
1547
     * - encoding: Set by libavcodec.
1548
     * - decoding: Set by libavcodec.
1549
     */
1550
    int has_b_frames;
1551

    
1552
    /**
1553
     * number of bytes per packet if constant and known or 0
1554
     * Used by some WAV based audio codecs.
1555
     */
1556
    int block_align;
1557

    
1558
    int parse_only; /* - decoding only: If true, only parsing is done
1559
                       (function avcodec_parse_frame()). The frame
1560
                       data is returned. Only MPEG codecs support this now. */
1561

    
1562
    /**
1563
     * 0-> h263 quant 1-> mpeg quant
1564
     * - encoding: Set by user.
1565
     * - decoding: unused
1566
     */
1567
    int mpeg_quant;
1568

    
1569
    /**
1570
     * pass1 encoding statistics output buffer
1571
     * - encoding: Set by libavcodec.
1572
     * - decoding: unused
1573
     */
1574
    char *stats_out;
1575

    
1576
    /**
1577
     * pass2 encoding statistics input buffer
1578
     * Concatenated stuff from stats_out of pass1 should be placed here.
1579
     * - encoding: Allocated/set/freed by user.
1580
     * - decoding: unused
1581
     */
1582
    char *stats_in;
1583

    
1584
    /**
1585
     * ratecontrol qmin qmax limiting method
1586
     * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
1587
     * - encoding: Set by user.
1588
     * - decoding: unused
1589
     */
1590
    float rc_qsquish;
1591

    
1592
    float rc_qmod_amp;
1593
    int rc_qmod_freq;
1594

    
1595
    /**
1596
     * ratecontrol override, see RcOverride
1597
     * - encoding: Allocated/set/freed by user.
1598
     * - decoding: unused
1599
     */
1600
    RcOverride *rc_override;
1601
    int rc_override_count;
1602

    
1603
    /**
1604
     * rate control equation
1605
     * - encoding: Set by user
1606
     * - decoding: unused
1607
     */
1608
    const char *rc_eq;
1609

    
1610
    /**
1611
     * maximum bitrate
1612
     * - encoding: Set by user.
1613
     * - decoding: unused
1614
     */
1615
    int rc_max_rate;
1616

    
1617
    /**
1618
     * minimum bitrate
1619
     * - encoding: Set by user.
1620
     * - decoding: unused
1621
     */
1622
    int rc_min_rate;
1623

    
1624
    /**
1625
     * decoder bitstream buffer size
1626
     * - encoding: Set by user.
1627
     * - decoding: unused
1628
     */
1629
    int rc_buffer_size;
1630
    float rc_buffer_aggressivity;
1631

    
1632
    /**
1633
     * qscale factor between P and I-frames
1634
     * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
1635
     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1636
     * - encoding: Set by user.
1637
     * - decoding: unused
1638
     */
1639
    float i_quant_factor;
1640

    
1641
    /**
1642
     * qscale offset between P and I-frames
1643
     * - encoding: Set by user.
1644
     * - decoding: unused
1645
     */
1646
    float i_quant_offset;
1647

    
1648
    /**
1649
     * initial complexity for pass1 ratecontrol
1650
     * - encoding: Set by user.
1651
     * - decoding: unused
1652
     */
1653
    float rc_initial_cplx;
1654

    
1655
    /**
1656
     * DCT algorithm, see FF_DCT_* below
1657
     * - encoding: Set by user.
1658
     * - decoding: unused
1659
     */
1660
    int dct_algo;
1661
#define FF_DCT_AUTO    0
1662
#define FF_DCT_FASTINT 1
1663
#define FF_DCT_INT     2
1664
#define FF_DCT_MMX     3
1665
#define FF_DCT_MLIB    4
1666
#define FF_DCT_ALTIVEC 5
1667
#define FF_DCT_FAAN    6
1668

    
1669
    /**
1670
     * luminance masking (0-> disabled)
1671
     * - encoding: Set by user.
1672
     * - decoding: unused
1673
     */
1674
    float lumi_masking;
1675

    
1676
    /**
1677
     * temporary complexity masking (0-> disabled)
1678
     * - encoding: Set by user.
1679
     * - decoding: unused
1680
     */
1681
    float temporal_cplx_masking;
1682

    
1683
    /**
1684
     * spatial complexity masking (0-> disabled)
1685
     * - encoding: Set by user.
1686
     * - decoding: unused
1687
     */
1688
    float spatial_cplx_masking;
1689

    
1690
    /**
1691
     * p block masking (0-> disabled)
1692
     * - encoding: Set by user.
1693
     * - decoding: unused
1694
     */
1695
    float p_masking;
1696

    
1697
    /**
1698
     * darkness masking (0-> disabled)
1699
     * - encoding: Set by user.
1700
     * - decoding: unused
1701
     */
1702
    float dark_masking;
1703

    
1704
    /**
1705
     * IDCT algorithm, see FF_IDCT_* below.
1706
     * - encoding: Set by user.
1707
     * - decoding: Set by user.
1708
     */
1709
    int idct_algo;
1710
#define FF_IDCT_AUTO          0
1711
#define FF_IDCT_INT           1
1712
#define FF_IDCT_SIMPLE        2
1713
#define FF_IDCT_SIMPLEMMX     3
1714
#define FF_IDCT_LIBMPEG2MMX   4
1715
#define FF_IDCT_PS2           5
1716
#define FF_IDCT_MLIB          6
1717
#define FF_IDCT_ARM           7
1718
#define FF_IDCT_ALTIVEC       8
1719
#define FF_IDCT_SH4           9
1720
#define FF_IDCT_SIMPLEARM     10
1721
#define FF_IDCT_H264          11
1722
#define FF_IDCT_VP3           12
1723
#define FF_IDCT_IPP           13
1724
#define FF_IDCT_XVIDMMX       14
1725
#define FF_IDCT_CAVS          15
1726
#define FF_IDCT_SIMPLEARMV5TE 16
1727
#define FF_IDCT_SIMPLEARMV6   17
1728
#define FF_IDCT_SIMPLEVIS     18
1729
#define FF_IDCT_WMV2          19
1730
#define FF_IDCT_FAAN          20
1731
#define FF_IDCT_EA            21
1732
#define FF_IDCT_SIMPLENEON    22
1733
#define FF_IDCT_SIMPLEALPHA   23
1734
#define FF_IDCT_BINK          24
1735

    
1736
    /**
1737
     * slice count
1738
     * - encoding: Set by libavcodec.
1739
     * - decoding: Set by user (or 0).
1740
     */
1741
    int slice_count;
1742
    /**
1743
     * slice offsets in the frame in bytes
1744
     * - encoding: Set/allocated by libavcodec.
1745
     * - decoding: Set/allocated by user (or NULL).
1746
     */
1747
    int *slice_offset;
1748

    
1749
    /**
1750
     * error concealment flags
1751
     * - encoding: unused
1752
     * - decoding: Set by user.
1753
     */
1754
    int error_concealment;
1755
#define FF_EC_GUESS_MVS   1
1756
#define FF_EC_DEBLOCK     2
1757

    
1758
    /**
1759
     * dsp_mask could be add used to disable unwanted CPU features
1760
     * CPU features (i.e. MMX, SSE. ...)
1761
     *
1762
     * With the FORCE flag you may instead enable given CPU features.
1763
     * (Dangerous: Usable in case of misdetection, improper usage however will
1764
     * result into program crash.)
1765
     */
1766
    unsigned dsp_mask;
1767

    
1768
#if FF_API_MM_FLAGS
1769
#define FF_MM_FORCE      AV_CPU_FLAG_FORCE
1770
#define FF_MM_MMX        AV_CPU_FLAG_MMX
1771
#define FF_MM_3DNOW      AV_CPU_FLAG_3DNOW
1772
#define FF_MM_MMXEXT     AV_CPU_FLAG_MMX2
1773
#define FF_MM_MMX2       AV_CPU_FLAG_MMX2
1774
#define FF_MM_SSE        AV_CPU_FLAG_SSE
1775
#define FF_MM_SSE2       AV_CPU_FLAG_SSE2
1776
#define FF_MM_SSE2SLOW   AV_CPU_FLAG_SSE2SLOW
1777
#define FF_MM_3DNOWEXT   AV_CPU_FLAG_3DNOWEXT
1778
#define FF_MM_SSE3       AV_CPU_FLAG_SSE3
1779
#define FF_MM_SSE3SLOW   AV_CPU_FLAG_SSE3SLOW
1780
#define FF_MM_SSSE3      AV_CPU_FLAG_SSSE3
1781
#define FF_MM_SSE4       AV_CPU_FLAG_SSE4
1782
#define FF_MM_SSE42      AV_CPU_FLAG_SSE42
1783
#define FF_MM_IWMMXT     AV_CPU_FLAG_IWMMXT
1784
#define FF_MM_ALTIVEC    AV_CPU_FLAG_ALTIVEC
1785
#endif
1786

    
1787
    /**
1788
     * bits per sample/pixel from the demuxer (needed for huffyuv).
1789
     * - encoding: Set by libavcodec.
1790
     * - decoding: Set by user.
1791
     */
1792
     int bits_per_coded_sample;
1793

    
1794
    /**
1795
     * prediction method (needed for huffyuv)
1796
     * - encoding: Set by user.
1797
     * - decoding: unused
1798
     */
1799
     int prediction_method;
1800
#define FF_PRED_LEFT   0
1801
#define FF_PRED_PLANE  1
1802
#define FF_PRED_MEDIAN 2
1803

    
1804
    /**
1805
     * sample aspect ratio (0 if unknown)
1806
     * That is the width of a pixel divided by the height of the pixel.
1807
     * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
1808
     * - encoding: Set by user.
1809
     * - decoding: Set by libavcodec.
1810
     */
1811
    AVRational sample_aspect_ratio;
1812

    
1813
    /**
1814
     * the picture in the bitstream
1815
     * - encoding: Set by libavcodec.
1816
     * - decoding: Set by libavcodec.
1817
     */
1818
    AVFrame *coded_frame;
1819

    
1820
    /**
1821
     * debug
1822
     * - encoding: Set by user.
1823
     * - decoding: Set by user.
1824
     */
1825
    int debug;
1826
#define FF_DEBUG_PICT_INFO   1
1827
#define FF_DEBUG_RC          2
1828
#define FF_DEBUG_BITSTREAM   4
1829
#define FF_DEBUG_MB_TYPE     8
1830
#define FF_DEBUG_QP          16
1831
#define FF_DEBUG_MV          32
1832
#define FF_DEBUG_DCT_COEFF   0x00000040
1833
#define FF_DEBUG_SKIP        0x00000080
1834
#define FF_DEBUG_STARTCODE   0x00000100
1835
#define FF_DEBUG_PTS         0x00000200
1836
#define FF_DEBUG_ER          0x00000400
1837
#define FF_DEBUG_MMCO        0x00000800
1838
#define FF_DEBUG_BUGS        0x00001000
1839
#define FF_DEBUG_VIS_QP      0x00002000
1840
#define FF_DEBUG_VIS_MB_TYPE 0x00004000
1841
#define FF_DEBUG_BUFFERS     0x00008000
1842
#define FF_DEBUG_THREADS     0x00010000
1843

    
1844
    /**
1845
     * debug
1846
     * - encoding: Set by user.
1847
     * - decoding: Set by user.
1848
     */
1849
    int debug_mv;
1850
#define FF_DEBUG_VIS_MV_P_FOR  0x00000001 //visualize forward predicted MVs of P frames
1851
#define FF_DEBUG_VIS_MV_B_FOR  0x00000002 //visualize forward predicted MVs of B frames
1852
#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1853

    
1854
    /**
1855
     * error
1856
     * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
1857
     * - decoding: unused
1858
     */
1859
    uint64_t error[4];
1860

    
1861
    /**
1862
     * minimum MB quantizer
1863
     * - encoding: unused
1864
     * - decoding: unused
1865
     */
1866
    int mb_qmin;
1867

    
1868
    /**
1869
     * maximum MB quantizer
1870
     * - encoding: unused
1871
     * - decoding: unused
1872
     */
1873
    int mb_qmax;
1874

    
1875
    /**
1876
     * motion estimation comparison function
1877
     * - encoding: Set by user.
1878
     * - decoding: unused
1879
     */
1880
    int me_cmp;
1881
    /**
1882
     * subpixel motion estimation comparison function
1883
     * - encoding: Set by user.
1884
     * - decoding: unused
1885
     */
1886
    int me_sub_cmp;
1887
    /**
1888
     * macroblock comparison function (not supported yet)
1889
     * - encoding: Set by user.
1890
     * - decoding: unused
1891
     */
1892
    int mb_cmp;
1893
    /**
1894
     * interlaced DCT comparison function
1895
     * - encoding: Set by user.
1896
     * - decoding: unused
1897
     */
1898
    int ildct_cmp;
1899
#define FF_CMP_SAD    0
1900
#define FF_CMP_SSE    1
1901
#define FF_CMP_SATD   2
1902
#define FF_CMP_DCT    3
1903
#define FF_CMP_PSNR   4
1904
#define FF_CMP_BIT    5
1905
#define FF_CMP_RD     6
1906
#define FF_CMP_ZERO   7
1907
#define FF_CMP_VSAD   8
1908
#define FF_CMP_VSSE   9
1909
#define FF_CMP_NSSE   10
1910
#define FF_CMP_W53    11
1911
#define FF_CMP_W97    12
1912
#define FF_CMP_DCTMAX 13
1913
#define FF_CMP_DCT264 14
1914
#define FF_CMP_CHROMA 256
1915

    
1916
    /**
1917
     * ME diamond size & shape
1918
     * - encoding: Set by user.
1919
     * - decoding: unused
1920
     */
1921
    int dia_size;
1922

    
1923
    /**
1924
     * amount of previous MV predictors (2a+1 x 2a+1 square)
1925
     * - encoding: Set by user.
1926
     * - decoding: unused
1927
     */
1928
    int last_predictor_count;
1929

    
1930
    /**
1931
     * prepass for motion estimation
1932
     * - encoding: Set by user.
1933
     * - decoding: unused
1934
     */
1935
    int pre_me;
1936

    
1937
    /**
1938
     * motion estimation prepass comparison function
1939
     * - encoding: Set by user.
1940
     * - decoding: unused
1941
     */
1942
    int me_pre_cmp;
1943

    
1944
    /**
1945
     * ME prepass diamond size & shape
1946
     * - encoding: Set by user.
1947
     * - decoding: unused
1948
     */
1949
    int pre_dia_size;
1950

    
1951
    /**
1952
     * subpel ME quality
1953
     * - encoding: Set by user.
1954
     * - decoding: unused
1955
     */
1956
    int me_subpel_quality;
1957

    
1958
    /**
1959
     * callback to negotiate the pixelFormat
1960
     * @param fmt is the list of formats which are supported by the codec,
1961
     * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
1962
     * The first is always the native one.
1963
     * @return the chosen format
1964
     * - encoding: unused
1965
     * - decoding: Set by user, if not set the native format will be chosen.
1966
     */
1967
    enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1968

    
1969
    /**
1970
     * DTG active format information (additional aspect ratio
1971
     * information only used in DVB MPEG-2 transport streams)
1972
     * 0 if not set.
1973
     *
1974
     * - encoding: unused
1975
     * - decoding: Set by decoder.
1976
     */
1977
    int dtg_active_format;
1978
#define FF_DTG_AFD_SAME         8
1979
#define FF_DTG_AFD_4_3          9
1980
#define FF_DTG_AFD_16_9         10
1981
#define FF_DTG_AFD_14_9         11
1982
#define FF_DTG_AFD_4_3_SP_14_9  13
1983
#define FF_DTG_AFD_16_9_SP_14_9 14
1984
#define FF_DTG_AFD_SP_4_3       15
1985

    
1986
    /**
1987
     * maximum motion estimation search range in subpel units
1988
     * If 0 then no limit.
1989
     *
1990
     * - encoding: Set by user.
1991
     * - decoding: unused
1992
     */
1993
    int me_range;
1994

    
1995
    /**
1996
     * intra quantizer bias
1997
     * - encoding: Set by user.
1998
     * - decoding: unused
1999
     */
2000
    int intra_quant_bias;
2001
#define FF_DEFAULT_QUANT_BIAS 999999
2002

    
2003
    /**
2004
     * inter quantizer bias
2005
     * - encoding: Set by user.
2006
     * - decoding: unused
2007
     */
2008
    int inter_quant_bias;
2009

    
2010
    /**
2011
     * color table ID
2012
     * - encoding: unused
2013
     * - decoding: Which clrtable should be used for 8bit RGB images.
2014
     *             Tables have to be stored somewhere. FIXME
2015
     */
2016
    int color_table_id;
2017

    
2018
    /**
2019
     * internal_buffer count
2020
     * Don't touch, used by libavcodec default_get_buffer().
2021
     */
2022
    int internal_buffer_count;
2023

    
2024
    /**
2025
     * internal_buffers
2026
     * Don't touch, used by libavcodec default_get_buffer().
2027
     */
2028
    void *internal_buffer;
2029

    
2030
    /**
2031
     * Global quality for codecs which cannot change it per frame.
2032
     * This should be proportional to MPEG-1/2/4 qscale.
2033
     * - encoding: Set by user.
2034
     * - decoding: unused
2035
     */
2036
    int global_quality;
2037

    
2038
#define FF_CODER_TYPE_VLC       0
2039
#define FF_CODER_TYPE_AC        1
2040
#define FF_CODER_TYPE_RAW       2
2041
#define FF_CODER_TYPE_RLE       3
2042
#define FF_CODER_TYPE_DEFLATE   4
2043
    /**
2044
     * coder type
2045
     * - encoding: Set by user.
2046
     * - decoding: unused
2047
     */
2048
    int coder_type;
2049

    
2050
    /**
2051
     * context model
2052
     * - encoding: Set by user.
2053
     * - decoding: unused
2054
     */
2055
    int context_model;
2056
#if 0
2057
    /**
2058
     *
2059
     * - encoding: unused
2060
     * - decoding: Set by user.
2061
     */
2062
    uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
2063
#endif
2064

    
2065
    /**
2066
     * slice flags
2067
     * - encoding: unused
2068
     * - decoding: Set by user.
2069
     */
2070
    int slice_flags;
2071
#define SLICE_FLAG_CODED_ORDER    0x0001 ///< draw_horiz_band() is called in coded order instead of display
2072
#define SLICE_FLAG_ALLOW_FIELD    0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
2073
#define SLICE_FLAG_ALLOW_PLANE    0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
2074

    
2075
    /**
2076
     * XVideo Motion Acceleration
2077
     * - encoding: forbidden
2078
     * - decoding: set by decoder
2079
     */
2080
    int xvmc_acceleration;
2081

    
2082
    /**
2083
     * macroblock decision mode
2084
     * - encoding: Set by user.
2085
     * - decoding: unused
2086
     */
2087
    int mb_decision;
2088
#define FF_MB_DECISION_SIMPLE 0        ///< uses mb_cmp
2089
#define FF_MB_DECISION_BITS   1        ///< chooses the one which needs the fewest bits
2090
#define FF_MB_DECISION_RD     2        ///< rate distortion
2091

    
2092
    /**
2093
     * custom intra quantization matrix
2094
     * - encoding: Set by user, can be NULL.
2095
     * - decoding: Set by libavcodec.
2096
     */
2097
    uint16_t *intra_matrix;
2098

    
2099
    /**
2100
     * custom inter quantization matrix
2101
     * - encoding: Set by user, can be NULL.
2102
     * - decoding: Set by libavcodec.
2103
     */
2104
    uint16_t *inter_matrix;
2105

    
2106
    /**
2107
     * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
2108
     * This is used to work around some encoder bugs.
2109
     * - encoding: unused
2110
     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
2111
     */
2112
    unsigned int stream_codec_tag;
2113

    
2114
    /**
2115
     * scene change detection threshold
2116
     * 0 is default, larger means fewer detected scene changes.
2117
     * - encoding: Set by user.
2118
     * - decoding: unused
2119
     */
2120
    int scenechange_threshold;
2121

    
2122
    /**
2123
     * minimum Lagrange multipler
2124
     * - encoding: Set by user.
2125
     * - decoding: unused
2126
     */
2127
    int lmin;
2128

    
2129
    /**
2130
     * maximum Lagrange multipler
2131
     * - encoding: Set by user.
2132
     * - decoding: unused
2133
     */
2134
    int lmax;
2135

    
2136
#if FF_API_PALETTE_CONTROL
2137
    /**
2138
     * palette control structure
2139
     * - encoding: ??? (no palette-enabled encoder yet)
2140
     * - decoding: Set by user.
2141
     */
2142
    struct AVPaletteControl *palctrl;
2143
#endif
2144

    
2145
    /**
2146
     * noise reduction strength
2147
     * - encoding: Set by user.
2148
     * - decoding: unused
2149
     */
2150
    int noise_reduction;
2151

    
2152
    /**
2153
     * Called at the beginning of a frame to get cr buffer for it.
2154
     * Buffer type (size, hints) must be the same. libavcodec won't check it.
2155
     * libavcodec will pass previous buffer in pic, function should return
2156
     * same buffer or new buffer with old frame "painted" into it.
2157
     * If pic.data[0] == NULL must behave like get_buffer().
2158
     * if CODEC_CAP_DR1 is not set then reget_buffer() must call
2159
     * avcodec_default_reget_buffer() instead of providing buffers allocated by
2160
     * some other means.
2161
     * - encoding: unused
2162
     * - decoding: Set by libavcodec, user can override.
2163
     */
2164
    int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
2165

    
2166
    /**
2167
     * Number of bits which should be loaded into the rc buffer before decoding starts.
2168
     * - encoding: Set by user.
2169
     * - decoding: unused
2170
     */
2171
    int rc_initial_buffer_occupancy;
2172

    
2173
    /**
2174
     *
2175
     * - encoding: Set by user.
2176
     * - decoding: unused
2177
     */
2178
    int inter_threshold;
2179

    
2180
    /**
2181
     * CODEC_FLAG2_*
2182
     * - encoding: Set by user.
2183
     * - decoding: Set by user.
2184
     */
2185
    int flags2;
2186

    
2187
    /**
2188
     * Simulates errors in the bitstream to test error concealment.
2189
     * - encoding: Set by user.
2190
     * - decoding: unused
2191
     */
2192
    int error_rate;
2193

    
2194
    /**
2195
     * MP3 antialias algorithm, see FF_AA_* below.
2196
     * - encoding: unused
2197
     * - decoding: Set by user.
2198
     */
2199
    int antialias_algo;
2200
#define FF_AA_AUTO    0
2201
#define FF_AA_FASTINT 1 //not implemented yet
2202
#define FF_AA_INT     2
2203
#define FF_AA_FLOAT   3
2204
    /**
2205
     * quantizer noise shaping
2206
     * - encoding: Set by user.
2207
     * - decoding: unused
2208
     */
2209
    int quantizer_noise_shaping;
2210

    
2211
    /**
2212
     * thread count
2213
     * is used to decide how many independent tasks should be passed to execute()
2214
     * - encoding: Set by user.
2215
     * - decoding: Set by user.
2216
     */
2217
    int thread_count;
2218

    
2219
    /**
2220
     * The codec may call this to execute several independent things.
2221
     * It will return only after finishing all tasks.
2222
     * The user may replace this with some multithreaded implementation,
2223
     * the default implementation will execute the parts serially.
2224
     * @param count the number of things to execute
2225
     * - encoding: Set by libavcodec, user can override.
2226
     * - decoding: Set by libavcodec, user can override.
2227
     */
2228
    int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size);
2229

    
2230
    /**
2231
     * thread opaque
2232
     * Can be used by execute() to store some per AVCodecContext stuff.
2233
     * - encoding: set by execute()
2234
     * - decoding: set by execute()
2235
     */
2236
    void *thread_opaque;
2237

    
2238
    /**
2239
     * Motion estimation threshold below which no motion estimation is
2240
     * performed, but instead the user specified motion vectors are used.
2241
     *
2242
     * - encoding: Set by user.
2243
     * - decoding: unused
2244
     */
2245
     int me_threshold;
2246

    
2247
    /**
2248
     * Macroblock threshold below which the user specified macroblock types will be used.
2249
     * - encoding: Set by user.
2250
     * - decoding: unused
2251
     */
2252
     int mb_threshold;
2253

    
2254
    /**
2255
     * precision of the intra DC coefficient - 8
2256
     * - encoding: Set by user.
2257
     * - decoding: unused
2258
     */
2259
     int intra_dc_precision;
2260

    
2261
    /**
2262
     * noise vs. sse weight for the nsse comparsion function
2263
     * - encoding: Set by user.
2264
     * - decoding: unused
2265
     */
2266
     int nsse_weight;
2267

    
2268
    /**
2269
     * Number of macroblock rows at the top which are skipped.
2270
     * - encoding: unused
2271
     * - decoding: Set by user.
2272
     */
2273
     int skip_top;
2274

    
2275
    /**
2276
     * Number of macroblock rows at the bottom which are skipped.
2277
     * - encoding: unused
2278
     * - decoding: Set by user.
2279
     */
2280
     int skip_bottom;
2281

    
2282
    /**
2283
     * profile
2284
     * - encoding: Set by user.
2285
     * - decoding: Set by libavcodec.
2286
     */
2287
     int profile;
2288
#define FF_PROFILE_UNKNOWN -99
2289

    
2290
#define FF_PROFILE_AAC_MAIN 0
2291
#define FF_PROFILE_AAC_LOW  1
2292
#define FF_PROFILE_AAC_SSR  2
2293
#define FF_PROFILE_AAC_LTP  3
2294

    
2295
#define FF_PROFILE_DTS         20
2296
#define FF_PROFILE_DTS_ES      30
2297
#define FF_PROFILE_DTS_96_24   40
2298
#define FF_PROFILE_DTS_HD_HRA  50
2299
#define FF_PROFILE_DTS_HD_MA   60
2300

    
2301
#define FF_PROFILE_H264_CONSTRAINED  (1<<9)  // 8+1; constraint_set1_flag
2302
#define FF_PROFILE_H264_INTRA        (1<<11) // 8+3; constraint_set3_flag
2303

    
2304
#define FF_PROFILE_H264_BASELINE             66
2305
#define FF_PROFILE_H264_CONSTRAINED_BASELINE (66|FF_PROFILE_H264_CONSTRAINED)
2306
#define FF_PROFILE_H264_MAIN                 77
2307
#define FF_PROFILE_H264_EXTENDED             88
2308
#define FF_PROFILE_H264_HIGH                 100
2309
#define FF_PROFILE_H264_HIGH_10              110
2310
#define FF_PROFILE_H264_HIGH_10_INTRA        (110|FF_PROFILE_H264_INTRA)
2311
#define FF_PROFILE_H264_HIGH_422             122
2312
#define FF_PROFILE_H264_HIGH_422_INTRA       (122|FF_PROFILE_H264_INTRA)
2313
#define FF_PROFILE_H264_HIGH_444             144
2314
#define FF_PROFILE_H264_HIGH_444_PREDICTIVE  244
2315
#define FF_PROFILE_H264_HIGH_444_INTRA       (244|FF_PROFILE_H264_INTRA)
2316
#define FF_PROFILE_H264_CAVLC_444            44
2317

    
2318
    /**
2319
     * level
2320
     * - encoding: Set by user.
2321
     * - decoding: Set by libavcodec.
2322
     */
2323
     int level;
2324
#define FF_LEVEL_UNKNOWN -99
2325

    
2326
    /**
2327
     * low resolution decoding, 1-> 1/2 size, 2->1/4 size
2328
     * - encoding: unused
2329
     * - decoding: Set by user.
2330
     */
2331
     int lowres;
2332

    
2333
    /**
2334
     * Bitstream width / height, may be different from width/height if lowres
2335
     * or other things are used.
2336
     * - encoding: unused
2337
     * - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
2338
     */
2339
    int coded_width, coded_height;
2340

    
2341
    /**
2342
     * frame skip threshold
2343
     * - encoding: Set by user.
2344
     * - decoding: unused
2345
     */
2346
    int frame_skip_threshold;
2347

    
2348
    /**
2349
     * frame skip factor
2350
     * - encoding: Set by user.
2351
     * - decoding: unused
2352
     */
2353
    int frame_skip_factor;
2354

    
2355
    /**
2356
     * frame skip exponent
2357
     * - encoding: Set by user.
2358
     * - decoding: unused
2359
     */
2360
    int frame_skip_exp;
2361

    
2362
    /**
2363
     * frame skip comparison function
2364
     * - encoding: Set by user.
2365
     * - decoding: unused
2366
     */
2367
    int frame_skip_cmp;
2368

    
2369
    /**
2370
     * Border processing masking, raises the quantizer for mbs on the borders
2371
     * of the picture.
2372
     * - encoding: Set by user.
2373
     * - decoding: unused
2374
     */
2375
    float border_masking;
2376

    
2377
    /**
2378
     * minimum MB lagrange multipler
2379
     * - encoding: Set by user.
2380
     * - decoding: unused
2381
     */
2382
    int mb_lmin;
2383

    
2384
    /**
2385
     * maximum MB lagrange multipler
2386
     * - encoding: Set by user.
2387
     * - decoding: unused
2388
     */
2389
    int mb_lmax;
2390

    
2391
    /**
2392
     *
2393
     * - encoding: Set by user.
2394
     * - decoding: unused
2395
     */
2396
    int me_penalty_compensation;
2397

    
2398
    /**
2399
     *
2400
     * - encoding: unused
2401
     * - decoding: Set by user.
2402
     */
2403
    enum AVDiscard skip_loop_filter;
2404

    
2405
    /**
2406
     *
2407
     * - encoding: unused
2408
     * - decoding: Set by user.
2409
     */
2410
    enum AVDiscard skip_idct;
2411

    
2412
    /**
2413
     *
2414
     * - encoding: unused
2415
     * - decoding: Set by user.
2416
     */
2417
    enum AVDiscard skip_frame;
2418

    
2419
    /**
2420
     *
2421
     * - encoding: Set by user.
2422
     * - decoding: unused
2423
     */
2424
    int bidir_refine;
2425

    
2426
    /**
2427
     *
2428
     * - encoding: Set by user.
2429
     * - decoding: unused
2430
     */
2431
    int brd_scale;
2432

    
2433
    /**
2434
     * constant rate factor - quality-based VBR - values ~correspond to qps
2435
     * - encoding: Set by user.
2436
     * - decoding: unused
2437
     */
2438
    float crf;
2439

    
2440
    /**
2441
     * constant quantization parameter rate control method
2442
     * - encoding: Set by user.
2443
     * - decoding: unused
2444
     */
2445
    int cqp;
2446

    
2447
    /**
2448
     * minimum GOP size
2449
     * - encoding: Set by user.
2450
     * - decoding: unused
2451
     */
2452
    int keyint_min;
2453

    
2454
    /**
2455
     * number of reference frames
2456
     * - encoding: Set by user.
2457
     * - decoding: Set by lavc.
2458
     */
2459
    int refs;
2460

    
2461
    /**
2462
     * chroma qp offset from luma
2463
     * - encoding: Set by user.
2464
     * - decoding: unused
2465
     */
2466
    int chromaoffset;
2467

    
2468
    /**
2469
     * Influences how often B-frames are used.
2470
     * - encoding: Set by user.
2471
     * - decoding: unused
2472
     */
2473
    int bframebias;
2474

    
2475
    /**
2476
     * trellis RD quantization
2477
     * - encoding: Set by user.
2478
     * - decoding: unused
2479
     */
2480
    int trellis;
2481

    
2482
    /**
2483
     * Reduce fluctuations in qp (before curve compression).
2484
     * - encoding: Set by user.
2485
     * - decoding: unused
2486
     */
2487
    float complexityblur;
2488

    
2489
    /**
2490
     * in-loop deblocking filter alphac0 parameter
2491
     * alpha is in the range -6...6
2492
     * - encoding: Set by user.
2493
     * - decoding: unused
2494
     */
2495
    int deblockalpha;
2496

    
2497
    /**
2498
     * in-loop deblocking filter beta parameter
2499
     * beta is in the range -6...6
2500
     * - encoding: Set by user.
2501
     * - decoding: unused
2502
     */
2503
    int deblockbeta;
2504

    
2505
    /**
2506
     * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
2507
     * - encoding: Set by user.
2508
     * - decoding: unused
2509
     */
2510
    int partitions;
2511
#define X264_PART_I4X4 0x001  /* Analyze i4x4 */
2512
#define X264_PART_I8X8 0x002  /* Analyze i8x8 (requires 8x8 transform) */
2513
#define X264_PART_P8X8 0x010  /* Analyze p16x8, p8x16 and p8x8 */
2514
#define X264_PART_P4X4 0x020  /* Analyze p8x4, p4x8, p4x4 */
2515
#define X264_PART_B8X8 0x100  /* Analyze b16x8, b8x16 and b8x8 */
2516

    
2517
    /**
2518
     * direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal), 3 (auto)
2519
     * - encoding: Set by user.
2520
     * - decoding: unused
2521
     */
2522
    int directpred;
2523

    
2524
    /**
2525
     * Audio cutoff bandwidth (0 means "automatic")
2526
     * - encoding: Set by user.
2527
     * - decoding: unused
2528
     */
2529
    int cutoff;
2530

    
2531
    /**
2532
     * Multiplied by qscale for each frame and added to scene_change_score.
2533
     * - encoding: Set by user.
2534
     * - decoding: unused
2535
     */
2536
    int scenechange_factor;
2537

    
2538
    /**
2539
     *
2540
     * Note: Value depends upon the compare function used for fullpel ME.
2541
     * - encoding: Set by user.
2542
     * - decoding: unused
2543
     */
2544
    int mv0_threshold;
2545

    
2546
    /**
2547
     * Adjusts sensitivity of b_frame_strategy 1.
2548
     * - encoding: Set by user.
2549
     * - decoding: unused
2550
     */
2551
    int b_sensitivity;
2552

    
2553
    /**
2554
     * - encoding: Set by user.
2555
     * - decoding: unused
2556
     */
2557
    int compression_level;
2558
#define FF_COMPRESSION_DEFAULT -1
2559

    
2560
#if FF_API_USE_LPC
2561
    /**
2562
     * Sets whether to use LPC mode - used by FLAC encoder.
2563
     * - encoding: Set by user.
2564
     * - decoding: unused
2565
     * @deprecated Deprecated in favor of lpc_type and lpc_passes.
2566
     */
2567
    int use_lpc;
2568
#endif
2569

    
2570
    /**
2571
     * LPC coefficient precision - used by FLAC encoder
2572
     * - encoding: Set by user.
2573
     * - decoding: unused
2574
     */
2575
    int lpc_coeff_precision;
2576

    
2577
    /**
2578
     * - encoding: Set by user.
2579
     * - decoding: unused
2580
     */
2581
    int min_prediction_order;
2582

    
2583
    /**
2584
     * - encoding: Set by user.
2585
     * - decoding: unused
2586
     */
2587
    int max_prediction_order;
2588

    
2589
    /**
2590
     * search method for selecting prediction order
2591
     * - encoding: Set by user.
2592
     * - decoding: unused
2593
     */
2594
    int prediction_order_method;
2595

    
2596
    /**
2597
     * - encoding: Set by user.
2598
     * - decoding: unused
2599
     */
2600
    int min_partition_order;
2601

    
2602
    /**
2603
     * - encoding: Set by user.
2604
     * - decoding: unused
2605
     */
2606
    int max_partition_order;
2607

    
2608
    /**
2609
     * GOP timecode frame start number, in non drop frame format
2610
     * - encoding: Set by user.
2611
     * - decoding: unused
2612
     */
2613
    int64_t timecode_frame_start;
2614

    
2615
#if LIBAVCODEC_VERSION_MAJOR < 53
2616
    /**
2617
     * Decoder should decode to this many channels if it can (0 for default)
2618
     * - encoding: unused
2619
     * - decoding: Set by user.
2620
     * @deprecated Deprecated in favor of request_channel_layout.
2621
     */
2622
    int request_channels;
2623
#endif
2624

    
2625
    /**
2626
     * Percentage of dynamic range compression to be applied by the decoder.
2627
     * The default value is 1.0, corresponding to full compression.
2628
     * - encoding: unused
2629
     * - decoding: Set by user.
2630
     */
2631
    float drc_scale;
2632

    
2633
    /**
2634
     * opaque 64bit number (generally a PTS) that will be reordered and
2635
     * output in AVFrame.reordered_opaque
2636
     * @deprecated in favor of pkt_pts
2637
     * - encoding: unused
2638
     * - decoding: Set by user.
2639
     */
2640
    int64_t reordered_opaque;
2641

    
2642
    /**
2643
     * Bits per sample/pixel of internal libavcodec pixel/sample format.
2644
     * This field is applicable only when sample_fmt is AV_SAMPLE_FMT_S32.
2645
     * - encoding: set by user.
2646
     * - decoding: set by libavcodec.
2647
     */
2648
    int bits_per_raw_sample;
2649

    
2650
    /**
2651
     * Audio channel layout.
2652
     * - encoding: set by user.
2653
     * - decoding: set by libavcodec.
2654
     */
2655
    int64_t channel_layout;
2656

    
2657
    /**
2658
     * Request decoder to use this channel layout if it can (0 for default)
2659
     * - encoding: unused
2660
     * - decoding: Set by user.
2661
     */
2662
    int64_t request_channel_layout;
2663

    
2664
    /**
2665
     * Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow.
2666
     * - encoding: Set by user.
2667
     * - decoding: unused.
2668
     */
2669
    float rc_max_available_vbv_use;
2670

    
2671
    /**
2672
     * Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow.
2673
     * - encoding: Set by user.
2674
     * - decoding: unused.
2675
     */
2676
    float rc_min_vbv_overflow_use;
2677

    
2678
    /**
2679
     * Hardware accelerator in use
2680
     * - encoding: unused.
2681
     * - decoding: Set by libavcodec
2682
     */
2683
    struct AVHWAccel *hwaccel;
2684

    
2685
    /**
2686
     * For some codecs, the time base is closer to the field rate than the frame rate.
2687
     * Most notably, H.264 and MPEG-2 specify time_base as half of frame duration
2688
     * if no telecine is used ...
2689
     *
2690
     * Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2.
2691
     */
2692
    int ticks_per_frame;
2693

    
2694
    /**
2695
     * Hardware accelerator context.
2696
     * For some hardware accelerators, a global context needs to be
2697
     * provided by the user. In that case, this holds display-dependent
2698
     * data FFmpeg cannot instantiate itself. Please refer to the
2699
     * FFmpeg HW accelerator documentation to know how to fill this
2700
     * is. e.g. for VA API, this is a struct vaapi_context.
2701
     * - encoding: unused
2702
     * - decoding: Set by user
2703
     */
2704
    void *hwaccel_context;
2705

    
2706
    /**
2707
     * Chromaticity coordinates of the source primaries.
2708
     * - encoding: Set by user
2709
     * - decoding: Set by libavcodec
2710
     */
2711
    enum AVColorPrimaries color_primaries;
2712

    
2713
    /**
2714
     * Color Transfer Characteristic.
2715
     * - encoding: Set by user
2716
     * - decoding: Set by libavcodec
2717
     */
2718
    enum AVColorTransferCharacteristic color_trc;
2719

    
2720
    /**
2721
     * YUV colorspace type.
2722
     * - encoding: Set by user
2723
     * - decoding: Set by libavcodec
2724
     */
2725
    enum AVColorSpace colorspace;
2726

    
2727
    /**
2728
     * MPEG vs JPEG YUV range.
2729
     * - encoding: Set by user
2730
     * - decoding: Set by libavcodec
2731
     */
2732
    enum AVColorRange color_range;
2733

    
2734
    /**
2735
     * This defines the location of chroma samples.
2736
     * - encoding: Set by user
2737
     * - decoding: Set by libavcodec
2738
     */
2739
    enum AVChromaLocation chroma_sample_location;
2740

    
2741
    /**
2742
     * The codec may call this to execute several independent things.
2743
     * It will return only after finishing all tasks.
2744
     * The user may replace this with some multithreaded implementation,
2745
     * the default implementation will execute the parts serially.
2746
     * Also see avcodec_thread_init and e.g. the --enable-pthread configure option.
2747
     * @param c context passed also to func
2748
     * @param count the number of things to execute
2749
     * @param arg2 argument passed unchanged to func
2750
     * @param ret return values of executed functions, must have space for "count" values. May be NULL.
2751
     * @param func function that will be called count times, with jobnr from 0 to count-1.
2752
     *             threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no
2753
     *             two instances of func executing at the same time will have the same threadnr.
2754
     * @return always 0 currently, but code should handle a future improvement where when any call to func
2755
     *         returns < 0 no further calls to func may be done and < 0 is returned.
2756
     * - encoding: Set by libavcodec, user can override.
2757
     * - decoding: Set by libavcodec, user can override.
2758
     */
2759
    int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count);
2760

    
2761
    /**
2762
     * explicit P-frame weighted prediction analysis method
2763
     * 0: off
2764
     * 1: fast blind weighting (one reference duplicate with -1 offset)
2765
     * 2: smart weighting (full fade detection analysis)
2766
     * - encoding: Set by user.
2767
     * - decoding: unused
2768
     */
2769
    int weighted_p_pred;
2770

    
2771
    /**
2772
     * AQ mode
2773
     * 0: Disabled
2774
     * 1: Variance AQ (complexity mask)
2775
     * 2: Auto-variance AQ (experimental)
2776
     * - encoding: Set by user
2777
     * - decoding: unused
2778
     */
2779
    int aq_mode;
2780

    
2781
    /**
2782
     * AQ strength
2783
     * Reduces blocking and blurring in flat and textured areas.
2784
     * - encoding: Set by user
2785
     * - decoding: unused
2786
     */
2787
    float aq_strength;
2788

    
2789
    /**
2790
     * PSY RD
2791
     * Strength of psychovisual optimization
2792
     * - encoding: Set by user
2793
     * - decoding: unused
2794
     */
2795
    float psy_rd;
2796

    
2797
    /**
2798
     * PSY trellis
2799
     * Strength of psychovisual optimization
2800
     * - encoding: Set by user
2801
     * - decoding: unused
2802
     */
2803
    float psy_trellis;
2804

    
2805
    /**
2806
     * RC lookahead
2807
     * Number of frames for frametype and ratecontrol lookahead
2808
     * - encoding: Set by user
2809
     * - decoding: unused
2810
     */
2811
    int rc_lookahead;
2812

    
2813
    /**
2814
     * Constant rate factor maximum
2815
     * With CRF encoding mode and VBV restrictions enabled, prevents quality from being worse
2816
     * than crf_max, even if doing so would violate VBV restrictions.
2817
     * - encoding: Set by user.
2818
     * - decoding: unused
2819
     */
2820
    float crf_max;
2821

    
2822
    int log_level_offset;
2823

    
2824
    /**
2825
     * Determines which LPC analysis algorithm to use.
2826
     * - encoding: Set by user
2827
     * - decoding: unused
2828
     */
2829
    enum AVLPCType lpc_type;
2830

    
2831
    /**
2832
     * Number of passes to use for Cholesky factorization during LPC analysis
2833
     * - encoding: Set by user
2834
     * - decoding: unused
2835
     */
2836
    int lpc_passes;
2837

    
2838
    /**
2839
     * Number of slices.
2840
     * Indicates number of picture subdivisions. Used for parallelized
2841
     * decoding.
2842
     * - encoding: Set by user
2843
     * - decoding: unused
2844
     */
2845
    int slices;
2846

    
2847
    /**
2848
     * Header containing style information for text subtitles.
2849
     * For SUBTITLE_ASS subtitle type, it should contain the whole ASS
2850
     * [Script Info] and [V4+ Styles] section, plus the [Events] line and
2851
     * the Format line following. It shouldn't include any Dialogue line.
2852
     * - encoding: Set/allocated/freed by user (before avcodec_open())
2853
     * - decoding: Set/allocated/freed by libavcodec (by avcodec_open())
2854
     */
2855
    uint8_t *subtitle_header;
2856
    int subtitle_header_size;
2857

    
2858
    /**
2859
     * Current packet as passed into the decoder, to avoid having
2860
     * to pass the packet into every function. Currently only valid
2861
     * inside lavc and get/release_buffer callbacks.
2862
     * - decoding: set by avcodec_decode_*, read by get_buffer() for setting pkt_pts
2863
     * - encoding: unused
2864
     */
2865
    AVPacket *pkt;
2866

    
2867
    /**
2868
     * Whether this is a copy of the context which had init() called on it.
2869
     * This is used by multithreading - shared tables and picture pointers
2870
     * should be freed from the original context only.
2871
     * - encoding: Set by libavcodec.
2872
     * - decoding: Set by libavcodec.
2873
     */
2874
    int is_copy;
2875

    
2876
    /**
2877
     * Which multithreading methods to use.
2878
     * Use of FF_THREAD_FRAME will increase decoding delay by one frame per thread,
2879
     * so clients which cannot provide future frames should not use it.
2880
     *
2881
     * - encoding: Set by user, otherwise the default is used.
2882
     * - decoding: Set by user, otherwise the default is used.
2883
     */
2884
    int thread_type;
2885
#define FF_THREAD_FRAME   1 //< Decode more than one frame at once
2886
#define FF_THREAD_SLICE   2 //< Decode more than one part of a single frame at once
2887

    
2888
    /**
2889
     * Which multithreading methods are in use by the codec.
2890
     * - encoding: Set by libavcodec.
2891
     * - decoding: Set by libavcodec.
2892
     */
2893
    int active_thread_type;
2894

    
2895
    /**
2896
     * Set by the client if its custom get_buffer() callback can be called
2897
     * from another thread, which allows faster multithreaded decoding.
2898
     * draw_horiz_band() will be called from other threads regardless of this setting.
2899
     * Ignored if the default get_buffer() is used.
2900
     * - encoding: Set by user.
2901
     * - decoding: Set by user.
2902
     */
2903
    int thread_safe_callbacks;
2904

    
2905
    /**
2906
     * VBV delay coded in the last frame (in periods of a 27 MHz clock).
2907
     * Used for compliant TS muxing.
2908
     * - encoding: Set by libavcodec.
2909
     * - decoding: unused.
2910
     */
2911
    uint64_t vbv_delay;
2912

    
2913
    /**
2914
     * Current statistics for PTS correction.
2915
     * - decoding: maintained and used by libavcodec, not intended to be used by user apps
2916
     * - encoding: unused
2917
     */
2918
    int64_t pts_correction_num_faulty_pts; /// Number of incorrect PTS values so far
2919
    int64_t pts_correction_num_faulty_dts; /// Number of incorrect DTS values so far
2920
    int64_t pts_correction_last_pts;       /// PTS of the last frame
2921
    int64_t pts_correction_last_dts;       /// DTS of the last frame
2922

    
2923
} AVCodecContext;
2924

    
2925
/**
2926
 * AVProfile.
2927
 */
2928
typedef struct AVProfile {
2929
    int profile;
2930
    const char *name; ///< short name for the profile
2931
} AVProfile;
2932

    
2933
/**
2934
 * AVCodec.
2935
 */
2936
typedef struct AVCodec {
2937
    /**
2938
     * Name of the codec implementation.
2939
     * The name is globally unique among encoders and among decoders (but an
2940
     * encoder and a decoder can share the same name).
2941
     * This is the primary way to find a codec from the user perspective.
2942
     */
2943
    const char *name;
2944
    enum AVMediaType type;
2945
    enum CodecID id;
2946
    int priv_data_size;
2947
    int (*init)(AVCodecContext *);
2948
    int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2949
    int (*close)(AVCodecContext *);
2950
    int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt);
2951
    /**
2952
     * Codec capabilities.
2953
     * see CODEC_CAP_*
2954
     */
2955
    int capabilities;
2956
    struct AVCodec *next;
2957
    /**
2958
     * Flush buffers.
2959
     * Will be called when seeking
2960
     */
2961
    void (*flush)(AVCodecContext *);
2962
    const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0}
2963
    const enum PixelFormat *pix_fmts;       ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1
2964
    /**
2965
     * Descriptive name for the codec, meant to be more human readable than name.
2966
     * You should use the NULL_IF_CONFIG_SMALL() macro to define it.
2967
     */
2968
    const char *long_name;
2969
    const int *supported_samplerates;       ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
2970
    const enum AVSampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1
2971
    const int64_t *channel_layouts;         ///< array of support channel layouts, or NULL if unknown. array is terminated by 0
2972
    uint8_t max_lowres;                     ///< maximum value for lowres supported by the decoder
2973
    AVClass *priv_class;                    ///< AVClass for the private context
2974
    const AVProfile *profiles;              ///< array of recognized profiles, or NULL if unknown, array is terminated by {FF_PROFILE_UNKNOWN}
2975

    
2976
    /**
2977
     * @defgroup framethreading Frame-level threading support functions.
2978
     * @{
2979
     */
2980
    /**
2981
     * If defined, called on thread contexts when they are created.
2982
     * If the codec allocates writable tables in init(), re-allocate them here.
2983
     * priv_data will be set to a copy of the original.
2984
     */
2985
    int (*init_thread_copy)(AVCodecContext *);
2986
    /**
2987
     * Copy necessary context variables from a previous thread context to the current one.
2988
     * If not defined, the next thread will start automatically; otherwise, the codec
2989
     * must call ff_thread_finish_setup().
2990
     *
2991
     * dst and src will (rarely) point to the same context, in which case memcpy should be skipped.
2992
     */
2993
    int (*update_thread_context)(AVCodecContext *dst, const AVCodecContext *src);
2994
    /** @} */
2995
} AVCodec;
2996

    
2997
/**
2998
 * AVHWAccel.
2999
 */
3000
typedef struct AVHWAccel {
3001
    /**
3002
     * Name of the hardware accelerated codec.
3003
     * The name is globally unique among encoders and among decoders (but an
3004
     * encoder and a decoder can share the same name).
3005
     */
3006
    const char *name;
3007

    
3008
    /**
3009
     * Type of codec implemented by the hardware accelerator.
3010
     *
3011
     * See AVMEDIA_TYPE_xxx
3012
     */
3013
    enum AVMediaType type;
3014

    
3015
    /**
3016
     * Codec implemented by the hardware accelerator.
3017
     *
3018
     * See CODEC_ID_xxx
3019
     */
3020
    enum CodecID id;
3021

    
3022
    /**
3023
     * Supported pixel format.
3024
     *
3025
     * Only hardware accelerated formats are supported here.
3026
     */
3027
    enum PixelFormat pix_fmt;
3028

    
3029
    /**
3030
     * Hardware accelerated codec capabilities.
3031
     * see FF_HWACCEL_CODEC_CAP_*
3032
     */
3033
    int capabilities;
3034

    
3035
    struct AVHWAccel *next;
3036

    
3037
    /**
3038
     * Called at the beginning of each frame or field picture.
3039
     *
3040
     * Meaningful frame information (codec specific) is guaranteed to
3041
     * be parsed at this point. This function is mandatory.
3042
     *
3043
     * Note that buf can be NULL along with buf_size set to 0.
3044
     * Otherwise, this means the whole frame is available at this point.
3045
     *
3046
     * @param avctx the codec context
3047
     * @param buf the frame data buffer base
3048
     * @param buf_size the size of the frame in bytes
3049
     * @return zero if successful, a negative value otherwise
3050
     */
3051
    int (*start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
3052

    
3053
    /**
3054
     * Callback for each slice.
3055
     *
3056
     * Meaningful slice information (codec specific) is guaranteed to
3057
     * be parsed at this point. This function is mandatory.
3058
     *
3059
     * @param avctx the codec context
3060
     * @param buf the slice data buffer base
3061
     * @param buf_size the size of the slice in bytes
3062
     * @return zero if successful, a negative value otherwise
3063
     */
3064
    int (*decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
3065

    
3066
    /**
3067
     * Called at the end of each frame or field picture.
3068
     *
3069
     * The whole picture is parsed at this point and can now be sent
3070
     * to the hardware accelerator. This function is mandatory.
3071
     *
3072
     * @param avctx the codec context
3073
     * @return zero if successful, a negative value otherwise
3074
     */
3075
    int (*end_frame)(AVCodecContext *avctx);
3076

    
3077
    /**
3078
     * Size of HW accelerator private data.
3079
     *
3080
     * Private data is allocated with av_mallocz() before
3081
     * AVCodecContext.get_buffer() and deallocated after
3082
     * AVCodecContext.release_buffer().
3083
     */
3084
    int priv_data_size;
3085
} AVHWAccel;
3086

    
3087
/**
3088
 * four components are given, that's all.
3089
 * the last component is alpha
3090
 */
3091
typedef struct AVPicture {
3092
    uint8_t *data[4];
3093
    int linesize[4];       ///< number of bytes per line
3094
} AVPicture;
3095

    
3096
#if FF_API_PALETTE_CONTROL
3097
/**
3098
 * AVPaletteControl
3099
 * This structure defines a method for communicating palette changes
3100
 * between and demuxer and a decoder.
3101
 *
3102
 * @deprecated Use AVPacket to send palette changes instead.
3103
 * This is totally broken.
3104
 */
3105
#define AVPALETTE_SIZE 1024
3106
#define AVPALETTE_COUNT 256
3107
typedef struct AVPaletteControl {
3108

    
3109
    /* Demuxer sets this to 1 to indicate the palette has changed;
3110
     * decoder resets to 0. */
3111
    int palette_changed;
3112

    
3113
    /* 4-byte ARGB palette entries, stored in native byte order; note that
3114
     * the individual palette components should be on a 8-bit scale; if
3115
     * the palette data comes from an IBM VGA native format, the component
3116
     * data is probably 6 bits in size and needs to be scaled. */
3117
    unsigned int palette[AVPALETTE_COUNT];
3118

    
3119
} AVPaletteControl attribute_deprecated;
3120
#endif
3121

    
3122
enum AVSubtitleType {
3123
    SUBTITLE_NONE,
3124

    
3125
    SUBTITLE_BITMAP,                ///< A bitmap, pict will be set
3126

    
3127
    /**
3128
     * Plain text, the text field must be set by the decoder and is
3129
     * authoritative. ass and pict fields may contain approximations.
3130
     */
3131
    SUBTITLE_TEXT,
3132

    
3133
    /**
3134
     * Formatted text, the ass field must be set by the decoder and is
3135
     * authoritative. pict and text fields may contain approximations.
3136
     */
3137
    SUBTITLE_ASS,
3138
};
3139

    
3140
typedef struct AVSubtitleRect {
3141
    int x;         ///< top left corner  of pict, undefined when pict is not set
3142
    int y;         ///< top left corner  of pict, undefined when pict is not set
3143
    int w;         ///< width            of pict, undefined when pict is not set
3144
    int h;         ///< height           of pict, undefined when pict is not set
3145
    int nb_colors; ///< number of colors in pict, undefined when pict is not set
3146

    
3147
    /**
3148
     * data+linesize for the bitmap of this subtitle.
3149
     * can be set for text/ass as well once they where rendered
3150
     */
3151
    AVPicture pict;
3152
    enum AVSubtitleType type;
3153

    
3154
    char *text;                     ///< 0 terminated plain UTF-8 text
3155

    
3156
    /**
3157
     * 0 terminated ASS/SSA compatible event line.
3158
     * The pressentation of this is unaffected by the other values in this
3159
     * struct.
3160
     */
3161
    char *ass;
3162
} AVSubtitleRect;
3163

    
3164
typedef struct AVSubtitle {
3165
    uint16_t format; /* 0 = graphics */
3166
    uint32_t start_display_time; /* relative to packet pts, in ms */
3167
    uint32_t end_display_time; /* relative to packet pts, in ms */
3168
    unsigned num_rects;
3169
    AVSubtitleRect **rects;
3170
    int64_t pts;    ///< Same as packet pts, in AV_TIME_BASE
3171
} AVSubtitle;
3172

    
3173
/* packet functions */
3174

    
3175
/**
3176
 * @deprecated use NULL instead
3177
 */
3178
attribute_deprecated void av_destruct_packet_nofree(AVPacket *pkt);
3179

    
3180
/**
3181
 * Default packet destructor.
3182
 */
3183
void av_destruct_packet(AVPacket *pkt);
3184

    
3185
/**
3186
 * Initialize optional fields of a packet with default values.
3187
 *
3188
 * @param pkt packet
3189
 */
3190
void av_init_packet(AVPacket *pkt);
3191

    
3192
/**
3193
 * Allocate the payload of a packet and initialize its fields with
3194
 * default values.
3195
 *
3196
 * @param pkt packet
3197
 * @param size wanted payload size
3198
 * @return 0 if OK, AVERROR_xxx otherwise
3199
 */
3200
int av_new_packet(AVPacket *pkt, int size);
3201

    
3202
/**
3203
 * Reduce packet size, correctly zeroing padding
3204
 *
3205
 * @param pkt packet
3206
 * @param size new size
3207
 */
3208
void av_shrink_packet(AVPacket *pkt, int size);
3209

    
3210
/**
3211
 * Increase packet size, correctly zeroing padding
3212
 *
3213
 * @param pkt packet
3214
 * @param grow_by number of bytes by which to increase the size of the packet
3215
 */
3216
int av_grow_packet(AVPacket *pkt, int grow_by);
3217

    
3218
/**
3219
 * @warning This is a hack - the packet memory allocation stuff is broken. The
3220
 * packet is allocated if it was not really allocated.
3221
 */
3222
int av_dup_packet(AVPacket *pkt);
3223

    
3224
/**
3225
 * Free a packet.
3226
 *
3227
 * @param pkt packet to free
3228
 */
3229
void av_free_packet(AVPacket *pkt);
3230

    
3231
/* resample.c */
3232

    
3233
struct ReSampleContext;
3234
struct AVResampleContext;
3235

    
3236
typedef struct ReSampleContext ReSampleContext;
3237

    
3238
#if FF_API_AUDIO_OLD
3239
/**
3240
 * @deprecated Use av_audio_resample_init() instead.
3241
 */
3242
attribute_deprecated ReSampleContext *audio_resample_init(int output_channels, int input_channels,
3243
                                                          int output_rate, int input_rate);
3244
#endif
3245

    
3246
/**
3247
 *  Initialize audio resampling context.
3248
 *
3249
 * @param output_channels  number of output channels
3250
 * @param input_channels   number of input channels
3251
 * @param output_rate      output sample rate
3252
 * @param input_rate       input sample rate
3253
 * @param sample_fmt_out   requested output sample format
3254
 * @param sample_fmt_in    input sample format
3255
 * @param filter_length    length of each FIR filter in the filterbank relative to the cutoff frequency
3256
 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
3257
 * @param linear           if 1 then the used FIR filter will be linearly interpolated
3258
                           between the 2 closest, if 0 the closest will be used
3259
 * @param cutoff           cutoff frequency, 1.0 corresponds to half the output sampling rate
3260
 * @return allocated ReSampleContext, NULL if error occured
3261
 */
3262
ReSampleContext *av_audio_resample_init(int output_channels, int input_channels,
3263
                                        int output_rate, int input_rate,
3264
                                        enum AVSampleFormat sample_fmt_out,
3265
                                        enum AVSampleFormat sample_fmt_in,
3266
                                        int filter_length, int log2_phase_count,
3267
                                        int linear, double cutoff);
3268

    
3269
int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
3270

    
3271
/**
3272
 * Free resample context.
3273
 *
3274
 * @param s a non-NULL pointer to a resample context previously
3275
 *          created with av_audio_resample_init()
3276
 */
3277
void audio_resample_close(ReSampleContext *s);
3278

    
3279

    
3280
/**
3281
 * Initialize an audio resampler.
3282
 * Note, if either rate is not an integer then simply scale both rates up so they are.
3283
 * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
3284
 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
3285
 * @param linear If 1 then the used FIR filter will be linearly interpolated
3286
                 between the 2 closest, if 0 the closest will be used
3287
 * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
3288
 */
3289
struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
3290

    
3291
/**
3292
 * Resample an array of samples using a previously configured context.
3293
 * @param src an array of unconsumed samples
3294
 * @param consumed the number of samples of src which have been consumed are returned here
3295
 * @param src_size the number of unconsumed samples available
3296
 * @param dst_size the amount of space in samples available in dst
3297
 * @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.
3298
 * @return the number of samples written in dst or -1 if an error occurred
3299
 */
3300
int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
3301

    
3302

    
3303
/**
3304
 * Compensate samplerate/timestamp drift. The compensation is done by changing
3305
 * the resampler parameters, so no audible clicks or similar distortions occur
3306
 * @param compensation_distance distance in output samples over which the compensation should be performed
3307
 * @param sample_delta number of output samples which should be output less
3308
 *
3309
 * example: av_resample_compensate(c, 10, 500)
3310
 * here instead of 510 samples only 500 samples would be output
3311
 *
3312
 * note, due to rounding the actual compensation might be slightly different,
3313
 * especially if the compensation_distance is large and the in_rate used during init is small
3314
 */
3315
void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
3316
void av_resample_close(struct AVResampleContext *c);
3317

    
3318
/**
3319
 * Allocate memory for a picture.  Call avpicture_free to free it.
3320
 *
3321
 * @param picture the picture to be filled in
3322
 * @param pix_fmt the format of the picture
3323
 * @param width the width of the picture
3324
 * @param height the height of the picture
3325
 * @return zero if successful, a negative value if not
3326
 */
3327
int avpicture_alloc(AVPicture *picture, enum PixelFormat pix_fmt, int width, int height);
3328

    
3329
/**
3330
 * Free a picture previously allocated by avpicture_alloc().
3331
 *
3332
 * @param picture the AVPicture to be freed
3333
 */
3334
void avpicture_free(AVPicture *picture);
3335

    
3336
/**
3337
 * Fill in the AVPicture fields.
3338
 * The fields of the given AVPicture are filled in by using the 'ptr' address
3339
 * which points to the image data buffer. Depending on the specified picture
3340
 * format, one or multiple image data pointers and line sizes will be set.
3341
 * If a planar format is specified, several pointers will be set pointing to
3342
 * the different picture planes and the line sizes of the different planes
3343
 * will be stored in the lines_sizes array.
3344
 * Call with ptr == NULL to get the required size for the ptr buffer.
3345
 *
3346
 * @param picture AVPicture whose fields are to be filled in
3347
 * @param ptr Buffer which will contain or contains the actual image data
3348
 * @param pix_fmt The format in which the picture data is stored.
3349
 * @param width the width of the image in pixels
3350
 * @param height the height of the image in pixels
3351
 * @return size of the image data in bytes
3352
 */
3353
int avpicture_fill(AVPicture *picture, uint8_t *ptr,
3354
                   enum PixelFormat pix_fmt, int width, int height);
3355
int avpicture_layout(const AVPicture* src, enum PixelFormat pix_fmt, int width, int height,
3356
                     unsigned char *dest, int dest_size);
3357

    
3358
/**
3359
 * Calculate the size in bytes that a picture of the given width and height
3360
 * would occupy if stored in the given picture format.
3361
 * Note that this returns the size of a compact representation as generated
3362
 * by avpicture_layout, which can be smaller than the size required for e.g.
3363
 * avpicture_fill.
3364
 *
3365
 * @param pix_fmt the given picture format
3366
 * @param width the width of the image
3367
 * @param height the height of the image
3368
 * @return Image data size in bytes or -1 on error (e.g. too large dimensions).
3369
 */
3370
int avpicture_get_size(enum PixelFormat pix_fmt, int width, int height);
3371
void avcodec_get_chroma_sub_sample(enum PixelFormat pix_fmt, int *h_shift, int *v_shift);
3372
const char *avcodec_get_pix_fmt_name(enum PixelFormat pix_fmt);
3373
void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
3374

    
3375
#if LIBAVCODEC_VERSION_MAJOR < 53
3376
/**
3377
 * Return the pixel format corresponding to the name name.
3378
 *
3379
 * If there is no pixel format with name name, then look for a
3380
 * pixel format with the name corresponding to the native endian
3381
 * format of name.
3382
 * For example in a little-endian system, first look for "gray16",
3383
 * then for "gray16le".
3384
 *
3385
 * Finally if no pixel format has been found, return PIX_FMT_NONE.
3386
 *
3387
 * @deprecated Deprecated in favor of av_get_pix_fmt().
3388
 */
3389
attribute_deprecated enum PixelFormat avcodec_get_pix_fmt(const char* name);
3390
#endif
3391

    
3392
/**
3393
 * Return a value representing the fourCC code associated to the
3394
 * pixel format pix_fmt, or 0 if no associated fourCC code can be
3395
 * found.
3396
 */
3397
unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat pix_fmt);
3398

    
3399
/**
3400
 * Put a string representing the codec tag codec_tag in buf.
3401
 *
3402
 * @param buf_size size in bytes of buf
3403
 * @return the length of the string that would have been generated if
3404
 * enough space had been available, excluding the trailing null
3405
 */
3406
size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag);
3407

    
3408
#define FF_LOSS_RESOLUTION  0x0001 /**< loss due to resolution change */
3409
#define FF_LOSS_DEPTH       0x0002 /**< loss due to color depth change */
3410
#define FF_LOSS_COLORSPACE  0x0004 /**< loss due to color space conversion */
3411
#define FF_LOSS_ALPHA       0x0008 /**< loss of alpha bits */
3412
#define FF_LOSS_COLORQUANT  0x0010 /**< loss due to color quantization */
3413
#define FF_LOSS_CHROMA      0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
3414

    
3415
/**
3416
 * Compute what kind of losses will occur when converting from one specific
3417
 * pixel format to another.
3418
 * When converting from one pixel format to another, information loss may occur.
3419
 * For example, when converting from RGB24 to GRAY, the color information will
3420
 * be lost. Similarly, other losses occur when converting from some formats to
3421
 * other formats. These losses can involve loss of chroma, but also loss of
3422
 * resolution, loss of color depth, loss due to the color space conversion, loss
3423
 * of the alpha bits or loss due to color quantization.
3424
 * avcodec_get_fix_fmt_loss() informs you about the various types of losses
3425
 * which will occur when converting from one pixel format to another.
3426
 *
3427
 * @param[in] dst_pix_fmt destination pixel format
3428
 * @param[in] src_pix_fmt source pixel format
3429
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
3430
 * @return Combination of flags informing you what kind of losses will occur.
3431
 */
3432
int avcodec_get_pix_fmt_loss(enum PixelFormat dst_pix_fmt, enum PixelFormat src_pix_fmt,
3433
                             int has_alpha);
3434

    
3435
/**
3436
 * Find the best pixel format to convert to given a certain source pixel
3437
 * format.  When converting from one pixel format to another, information loss
3438
 * may occur.  For example, when converting from RGB24 to GRAY, the color
3439
 * information will be lost. Similarly, other losses occur when converting from
3440
 * some formats to other formats. avcodec_find_best_pix_fmt() searches which of
3441
 * the given pixel formats should be used to suffer the least amount of loss.
3442
 * The pixel formats from which it chooses one, are determined by the
3443
 * pix_fmt_mask parameter.
3444
 *
3445
 * @code
3446
 * src_pix_fmt = PIX_FMT_YUV420P;
3447
 * pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << PIX_FMT_RGB24);
3448
 * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
3449
 * @endcode
3450
 *
3451
 * @param[in] pix_fmt_mask bitmask determining which pixel format to choose from
3452
 * @param[in] src_pix_fmt source pixel format
3453
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
3454
 * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
3455
 * @return The best pixel format to convert to or -1 if none was found.
3456
 */
3457
enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt,
3458
                              int has_alpha, int *loss_ptr);
3459

    
3460
#if LIBAVCODEC_VERSION_MAJOR < 53
3461
/**
3462
 * @deprecated Use av_get_pix_fmt_string() instead.
3463
 */
3464
attribute_deprecated
3465
void avcodec_pix_fmt_string (char *buf, int buf_size, enum PixelFormat pix_fmt);
3466
#endif
3467

    
3468
#define FF_ALPHA_TRANSP       0x0001 /* image has some totally transparent pixels */
3469
#define FF_ALPHA_SEMI_TRANSP  0x0002 /* image has some transparent pixels */
3470

    
3471
/**
3472
 * Tell if an image really has transparent alpha values.
3473
 * @return ored mask of FF_ALPHA_xxx constants
3474
 */
3475
int img_get_alpha_info(const AVPicture *src,
3476
                       enum PixelFormat pix_fmt, int width, int height);
3477

    
3478
/* deinterlace a picture */
3479
/* deinterlace - if not supported return -1 */
3480
int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
3481
                          enum PixelFormat pix_fmt, int width, int height);
3482

    
3483
/* external high level API */
3484

    
3485
/**
3486
 * If c is NULL, returns the first registered codec,
3487
 * if c is non-NULL, returns the next registered codec after c,
3488
 * or NULL if c is the last one.
3489
 */
3490
AVCodec *av_codec_next(AVCodec *c);
3491

    
3492
/**
3493
 * Return the LIBAVCODEC_VERSION_INT constant.
3494
 */
3495
unsigned avcodec_version(void);
3496

    
3497
/**
3498
 * Return the libavcodec build-time configuration.
3499
 */
3500
const char *avcodec_configuration(void);
3501

    
3502
/**
3503
 * Return the libavcodec license.
3504
 */
3505
const char *avcodec_license(void);
3506

    
3507
/**
3508
 * Initialize libavcodec.
3509
 *
3510
 * @warning This function must be called before any other libavcodec
3511
 * function.
3512
 */
3513
void avcodec_init(void);
3514

    
3515
#if LIBAVCODEC_VERSION_MAJOR < 53
3516
/**
3517
 * @deprecated Deprecated in favor of avcodec_register().
3518
 */
3519
attribute_deprecated void register_avcodec(AVCodec *codec);
3520
#endif
3521

    
3522
/**
3523
 * Register the codec codec and initialize libavcodec.
3524
 *
3525
 * @see avcodec_init()
3526
 */
3527
void avcodec_register(AVCodec *codec);
3528

    
3529
/**
3530
 * Find a registered encoder with a matching codec ID.
3531
 *
3532
 * @param id CodecID of the requested encoder
3533
 * @return An encoder if one was found, NULL otherwise.
3534
 */
3535
AVCodec *avcodec_find_encoder(enum CodecID id);
3536

    
3537
/**
3538
 * Find a registered encoder with the specified name.
3539
 *
3540
 * @param name name of the requested encoder
3541
 * @return An encoder if one was found, NULL otherwise.
3542
 */
3543
AVCodec *avcodec_find_encoder_by_name(const char *name);
3544

    
3545
/**
3546
 * Find a registered decoder with a matching codec ID.
3547
 *
3548
 * @param id CodecID of the requested decoder
3549
 * @return A decoder if one was found, NULL otherwise.
3550
 */
3551
AVCodec *avcodec_find_decoder(enum CodecID id);
3552

    
3553
/**
3554
 * Find a registered decoder with the specified name.
3555
 *
3556
 * @param name name of the requested decoder
3557
 * @return A decoder if one was found, NULL otherwise.
3558
 */
3559
AVCodec *avcodec_find_decoder_by_name(const char *name);
3560
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
3561

    
3562
/**
3563
 * Return a name for the specified profile, if available.
3564
 *
3565
 * @param codec the codec that is searched for the given profile
3566
 * @param profile the profile value for which a name is requested
3567
 * @return A name for the profile if found, NULL otherwise.
3568
 */
3569
const char *av_get_profile_name(const AVCodec *codec, int profile);
3570

    
3571
/**
3572
 * Set the fields of the given AVCodecContext to default values.
3573
 *
3574
 * @param s The AVCodecContext of which the fields should be set to default values.
3575
 */
3576
void avcodec_get_context_defaults(AVCodecContext *s);
3577

    
3578
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3579
 *  we WILL change its arguments and name a few times! */
3580
void avcodec_get_context_defaults2(AVCodecContext *s, enum AVMediaType);
3581

    
3582
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3583
 *  we WILL change its arguments and name a few times! */
3584
int avcodec_get_context_defaults3(AVCodecContext *s, AVCodec *codec);
3585

    
3586
/**
3587
 * Allocate an AVCodecContext and set its fields to default values.  The
3588
 * resulting struct can be deallocated by simply calling av_free().
3589
 *
3590
 * @return An AVCodecContext filled with default values or NULL on failure.
3591
 * @see avcodec_get_context_defaults
3592
 */
3593
AVCodecContext *avcodec_alloc_context(void);
3594

    
3595
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3596
 *  we WILL change its arguments and name a few times! */
3597
AVCodecContext *avcodec_alloc_context2(enum AVMediaType);
3598

    
3599
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3600
 *  we WILL change its arguments and name a few times! */
3601
AVCodecContext *avcodec_alloc_context3(AVCodec *codec);
3602

    
3603
/**
3604
 * Copy the settings of the source AVCodecContext into the destination
3605
 * AVCodecContext. The resulting destination codec context will be
3606
 * unopened, i.e. you are required to call avcodec_open() before you
3607
 * can use this AVCodecContext to decode/encode video/audio data.
3608
 *
3609
 * @param dest target codec context, should be initialized with
3610
 *             avcodec_alloc_context(), but otherwise uninitialized
3611
 * @param src source codec context
3612
 * @return AVERROR() on error (e.g. memory allocation error), 0 on success
3613
 */
3614
int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src);
3615

    
3616
/**
3617
 * Set the fields of the given AVFrame to default values.
3618
 *
3619
 * @param pic The AVFrame of which the fields should be set to default values.
3620
 */
3621
void avcodec_get_frame_defaults(AVFrame *pic);
3622

    
3623
/**
3624
 * Allocate an AVFrame and set its fields to default values.  The resulting
3625
 * struct can be deallocated by simply calling av_free().
3626
 *
3627
 * @return An AVFrame filled with default values or NULL on failure.
3628
 * @see avcodec_get_frame_defaults
3629
 */
3630
AVFrame *avcodec_alloc_frame(void);
3631

    
3632
int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
3633
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
3634
int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
3635

    
3636
/**
3637
 * Return the amount of padding in pixels which the get_buffer callback must
3638
 * provide around the edge of the image for codecs which do not have the
3639
 * CODEC_FLAG_EMU_EDGE flag.
3640
 *
3641
 * @return Required padding in pixels.
3642
 */
3643
unsigned avcodec_get_edge_width(void);
3644
/**
3645
 * Modify width and height values so that they will result in a memory
3646
 * buffer that is acceptable for the codec if you do not use any horizontal
3647
 * padding.
3648
 *
3649
 * May only be used if a codec with CODEC_CAP_DR1 has been opened.
3650
 * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
3651
 * according to avcodec_get_edge_width() before.
3652
 */
3653
void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
3654
/**
3655
 * Modify width and height values so that they will result in a memory
3656
 * buffer that is acceptable for the codec if you also ensure that all
3657
 * line sizes are a multiple of the respective linesize_align[i].
3658
 *
3659
 * May only be used if a codec with CODEC_CAP_DR1 has been opened.
3660
 * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
3661
 * according to avcodec_get_edge_width() before.
3662
 */
3663
void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
3664
                               int linesize_align[4]);
3665

    
3666
#if LIBAVCODEC_VERSION_MAJOR < 53
3667
/**
3668
 * @deprecated Deprecated in favor of av_check_image_size().
3669
 */
3670
attribute_deprecated
3671
int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
3672
#endif
3673

    
3674
enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
3675

    
3676
#if LIBAVCODEC_VERSION_MAJOR < 53
3677
/**
3678
 * @deprecated Set s->thread_count before calling avcodec_open() instead of calling this.
3679
 */
3680
attribute_deprecated
3681
int avcodec_thread_init(AVCodecContext *s, int thread_count);
3682
void avcodec_thread_free(AVCodecContext *s);
3683
#endif
3684
int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size);
3685
int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int, int),void *arg, int *ret, int count);
3686
//FIXME func typedef
3687

    
3688
/**
3689
 * Initialize the AVCodecContext to use the given AVCodec. Prior to using this
3690
 * function the context has to be allocated.
3691
 *
3692
 * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
3693
 * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
3694
 * retrieving a codec.
3695
 *
3696
 * @warning This function is not thread safe!
3697
 *
3698
 * @code
3699
 * avcodec_register_all();
3700
 * codec = avcodec_find_decoder(CODEC_ID_H264);
3701
 * if (!codec)
3702
 *     exit(1);
3703
 *
3704
 * context = avcodec_alloc_context();
3705
 *
3706
 * if (avcodec_open(context, codec) < 0)
3707
 *     exit(1);
3708
 * @endcode
3709
 *
3710
 * @param avctx The context which will be set up to use the given codec.
3711
 * @param codec The codec to use within the context.
3712
 * @return zero on success, a negative value on error
3713
 * @see avcodec_alloc_context, avcodec_find_decoder, avcodec_find_encoder
3714
 */
3715
int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
3716

    
3717
#if FF_API_AUDIO_OLD
3718
/**
3719
 * Decode an audio frame from buf into samples.
3720
 * Wrapper function which calls avcodec_decode_audio3.
3721
 *
3722
 * @deprecated Use avcodec_decode_audio3 instead.
3723
 * @param avctx the codec context
3724
 * @param[out] samples the output buffer
3725
 * @param[in,out] frame_size_ptr the output buffer size in bytes
3726
 * @param[in] buf the input buffer
3727
 * @param[in] buf_size the input buffer size in bytes
3728
 * @return On error a negative value is returned, otherwise the number of bytes
3729
 * used or zero if no frame could be decompressed.
3730
 */
3731
attribute_deprecated int avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
3732
                         int *frame_size_ptr,
3733
                         const uint8_t *buf, int buf_size);
3734
#endif
3735

    
3736
/**
3737
 * Decode the audio frame of size avpkt->size from avpkt->data into samples.
3738
 * Some decoders may support multiple frames in a single AVPacket, such
3739
 * decoders would then just decode the first frame. In this case,
3740
 * avcodec_decode_audio3 has to be called again with an AVPacket that contains
3741
 * the remaining data in order to decode the second frame etc.
3742
 * If no frame
3743
 * could be outputted, frame_size_ptr is zero. Otherwise, it is the
3744
 * decompressed frame size in bytes.
3745
 *
3746
 * @warning You must set frame_size_ptr to the allocated size of the
3747
 * output buffer before calling avcodec_decode_audio3().
3748
 *
3749
 * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
3750
 * the actual read bytes because some optimized bitstream readers read 32 or 64
3751
 * bits at once and could read over the end.
3752
 *
3753
 * @warning The end of the input buffer avpkt->data should be set to 0 to ensure that
3754
 * no overreading happens for damaged MPEG streams.
3755
 *
3756
 * @note You might have to align the input buffer avpkt->data and output buffer
3757
 * samples. The alignment requirements depend on the CPU: On some CPUs it isn't
3758
 * necessary at all, on others it won't work at all if not aligned and on others
3759
 * it will work but it will have an impact on performance.
3760
 *
3761
 * In practice, avpkt->data should have 4 byte alignment at minimum and
3762
 * samples should be 16 byte aligned unless the CPU doesn't need it
3763
 * (AltiVec and SSE do).
3764
 *
3765
 * @param avctx the codec context
3766
 * @param[out] samples the output buffer, sample type in avctx->sample_fmt
3767
 * @param[in,out] frame_size_ptr the output buffer size in bytes
3768
 * @param[in] avpkt The input AVPacket containing the input buffer.
3769
 *            You can create such packet with av_init_packet() and by then setting
3770
 *            data and size, some decoders might in addition need other fields.
3771
 *            All decoders are designed to use the least fields possible though.
3772
 * @return On error a negative value is returned, otherwise the number of bytes
3773
 * used or zero if no frame data was decompressed (used) from the input AVPacket.
3774
 */
3775
int avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
3776
                         int *frame_size_ptr,
3777
                         AVPacket *avpkt);
3778

    
3779
#if FF_API_VIDEO_OLD
3780
/**
3781
 * Decode a video frame from buf into picture.
3782
 * Wrapper function which calls avcodec_decode_video2.
3783
 *
3784
 * @deprecated Use avcodec_decode_video2 instead.
3785
 * @param avctx the codec context
3786
 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
3787
 * @param[in] buf the input buffer
3788
 * @param[in] buf_size the size of the input buffer in bytes
3789
 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
3790
 * @return On error a negative value is returned, otherwise the number of bytes
3791
 * used or zero if no frame could be decompressed.
3792
 */
3793
attribute_deprecated int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
3794
                         int *got_picture_ptr,
3795
                         const uint8_t *buf, int buf_size);
3796
#endif
3797

    
3798
/**
3799
 * Decode the video frame of size avpkt->size from avpkt->data into picture.
3800
 * Some decoders may support multiple frames in a single AVPacket, such
3801
 * decoders would then just decode the first frame.
3802
 *
3803
 * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
3804
 * the actual read bytes because some optimized bitstream readers read 32 or 64
3805
 * bits at once and could read over the end.
3806
 *
3807
 * @warning The end of the input buffer buf should be set to 0 to ensure that
3808
 * no overreading happens for damaged MPEG streams.
3809
 *
3810
 * @note You might have to align the input buffer avpkt->data.
3811
 * The alignment requirements depend on the CPU: on some CPUs it isn't
3812
 * necessary at all, on others it won't work at all if not aligned and on others
3813
 * it will work but it will have an impact on performance.
3814
 *
3815
 * In practice, avpkt->data should have 4 byte alignment at minimum.
3816
 *
3817
 * @note Some codecs have a delay between input and output, these need to be
3818
 * fed with avpkt->data=NULL, avpkt->size=0 at the end to return the remaining frames.
3819
 *
3820
 * @param avctx the codec context
3821
 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
3822
 *             Use avcodec_alloc_frame to get an AVFrame, the codec will
3823
 *             allocate memory for the actual bitmap.
3824
 *             with default get/release_buffer(), the decoder frees/reuses the bitmap as it sees fit.
3825
 *             with overridden get/release_buffer() (needs CODEC_CAP_DR1) the user decides into what buffer the decoder
3826
 *                   decodes and the decoder tells the user once it does not need the data anymore,
3827
 *                   the user app can at this point free/reuse/keep the memory as it sees fit.
3828
 *
3829
 * @param[in] avpkt The input AVpacket containing the input buffer.
3830
 *            You can create such packet with av_init_packet() and by then setting
3831
 *            data and size, some decoders might in addition need other fields like
3832
 *            flags&AV_PKT_FLAG_KEY. All decoders are designed to use the least
3833
 *            fields possible.
3834
 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
3835
 * @return On error a negative value is returned, otherwise the number of bytes
3836
 * used or zero if no frame could be decompressed.
3837
 */
3838
int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
3839
                         int *got_picture_ptr,
3840
                         AVPacket *avpkt);
3841

    
3842
#if FF_API_SUBTITLE_OLD
3843
/* Decode a subtitle message. Return -1 if error, otherwise return the
3844
 * number of bytes used. If no subtitle could be decompressed,
3845
 * got_sub_ptr is zero. Otherwise, the subtitle is stored in *sub. */
3846
attribute_deprecated int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
3847
                            int *got_sub_ptr,
3848
                            const uint8_t *buf, int buf_size);
3849
#endif
3850

    
3851
/**
3852
 * Decode a subtitle message.
3853
 * Return a negative value on error, otherwise return the number of bytes used.
3854
 * If no subtitle could be decompressed, got_sub_ptr is zero.
3855
 * Otherwise, the subtitle is stored in *sub.
3856
 * Note that CODEC_CAP_DR1 is not available for subtitle codecs. This is for
3857
 * simplicity, because the performance difference is expect to be negligible
3858
 * and reusing a get_buffer written for video codecs would probably perform badly
3859
 * due to a potentially very different allocation pattern.
3860
 *
3861
 * @param avctx the codec context
3862
 * @param[out] sub The AVSubtitle in which the decoded subtitle will be stored, must be
3863
                   freed with avsubtitle_free if *got_sub_ptr is set.
3864
 * @param[in,out] got_sub_ptr Zero if no subtitle could be decompressed, otherwise, it is nonzero.
3865
 * @param[in] avpkt The input AVPacket containing the input buffer.
3866
 */
3867
int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
3868
                            int *got_sub_ptr,
3869
                            AVPacket *avpkt);
3870

    
3871
/**
3872
 * Frees all allocated data in the given subtitle struct.
3873
 *
3874
 * @param sub AVSubtitle to free.
3875
 */
3876
void avsubtitle_free(AVSubtitle *sub);
3877

    
3878
int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
3879
                        int *data_size_ptr,
3880
                        uint8_t *buf, int buf_size);
3881

    
3882
/**
3883
 * Encode an audio frame from samples into buf.
3884
 *
3885
 * @note The output buffer should be at least FF_MIN_BUFFER_SIZE bytes large.
3886
 * However, for PCM audio the user will know how much space is needed
3887
 * because it depends on the value passed in buf_size as described
3888
 * below. In that case a lower value can be used.
3889
 *
3890
 * @param avctx the codec context
3891
 * @param[out] buf the output buffer
3892
 * @param[in] buf_size the output buffer size
3893
 * @param[in] samples the input buffer containing the samples
3894
 * The number of samples read from this buffer is frame_size*channels,
3895
 * both of which are defined in avctx.
3896
 * For PCM audio the number of samples read from samples is equal to
3897
 * buf_size * input_sample_size / output_sample_size.
3898
 * @return On error a negative value is returned, on success zero or the number
3899
 * of bytes used to encode the data read from the input buffer.
3900
 */
3901
int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3902
                         const short *samples);
3903

    
3904
/**
3905
 * Encode a video frame from pict into buf.
3906
 * The input picture should be
3907
 * stored using a specific format, namely avctx.pix_fmt.
3908
 *
3909
 * @param avctx the codec context
3910
 * @param[out] buf the output buffer for the bitstream of encoded frame
3911
 * @param[in] buf_size the size of the output buffer in bytes
3912
 * @param[in] pict the input picture to encode
3913
 * @return On error a negative value is returned, on success zero or the number
3914
 * of bytes used from the output buffer.
3915
 */
3916
int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3917
                         const AVFrame *pict);
3918
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3919
                            const AVSubtitle *sub);
3920

    
3921
int avcodec_close(AVCodecContext *avctx);
3922

    
3923
/**
3924
 * Register all the codecs, parsers and bitstream filters which were enabled at
3925
 * configuration time. If you do not call this function you can select exactly
3926
 * which formats you want to support, by using the individual registration
3927
 * functions.
3928
 *
3929
 * @see avcodec_register
3930
 * @see av_register_codec_parser
3931
 * @see av_register_bitstream_filter
3932
 */
3933
void avcodec_register_all(void);
3934

    
3935
/**
3936
 * Flush buffers, should be called when seeking or when switching to a different stream.
3937
 */
3938
void avcodec_flush_buffers(AVCodecContext *avctx);
3939

    
3940
void avcodec_default_free_buffers(AVCodecContext *s);
3941

    
3942
/* misc useful functions */
3943

    
3944
/**
3945
 * Return a single letter to describe the given picture type pict_type.
3946
 *
3947
 * @param[in] pict_type the picture type
3948
 * @return A single character representing the picture type.
3949
 */
3950
char av_get_pict_type_char(int pict_type);
3951

    
3952
/**
3953
 * Return codec bits per sample.
3954
 *
3955
 * @param[in] codec_id the codec
3956
 * @return Number of bits per sample or zero if unknown for the given codec.
3957
 */
3958
int av_get_bits_per_sample(enum CodecID codec_id);
3959

    
3960
#if FF_API_OLD_SAMPLE_FMT
3961
/**
3962
 * @deprecated Use av_get_bits_per_sample_fmt() instead.
3963
 */
3964
attribute_deprecated
3965
int av_get_bits_per_sample_format(enum AVSampleFormat sample_fmt);
3966
#endif
3967

    
3968
/* frame parsing */
3969
typedef struct AVCodecParserContext {
3970
    void *priv_data;
3971
    struct AVCodecParser *parser;
3972
    int64_t frame_offset; /* offset of the current frame */
3973
    int64_t cur_offset; /* current offset
3974
                           (incremented by each av_parser_parse()) */
3975
    int64_t next_frame_offset; /* offset of the next frame */
3976
    /* video info */
3977
    int pict_type; /* XXX: Put it back in AVCodecContext. */
3978
    /**
3979
     * This field is used for proper frame duration computation in lavf.
3980
     * It signals, how much longer the frame duration of the current frame
3981
     * is compared to normal frame duration.
3982
     *
3983
     * frame_duration = (1 + repeat_pict) * time_base
3984
     *
3985
     * It is used by codecs like H.264 to display telecined material.
3986
     */
3987
    int repeat_pict; /* XXX: Put it back in AVCodecContext. */
3988
    int64_t pts;     /* pts of the current frame */
3989
    int64_t dts;     /* dts of the current frame */
3990

    
3991
    /* private data */
3992
    int64_t last_pts;
3993
    int64_t last_dts;
3994
    int fetch_timestamp;
3995

    
3996
#define AV_PARSER_PTS_NB 4
3997
    int cur_frame_start_index;
3998
    int64_t cur_frame_offset[AV_PARSER_PTS_NB];
3999
    int64_t cur_frame_pts[AV_PARSER_PTS_NB];
4000
    int64_t cur_frame_dts[AV_PARSER_PTS_NB];
4001

    
4002
    int flags;
4003
#define PARSER_FLAG_COMPLETE_FRAMES           0x0001
4004
#define PARSER_FLAG_ONCE                      0x0002
4005
/// Set if the parser has a valid file offset
4006
#define PARSER_FLAG_FETCHED_OFFSET            0x0004
4007

    
4008
    int64_t offset;      ///< byte offset from starting packet start
4009
    int64_t cur_frame_end[AV_PARSER_PTS_NB];
4010

    
4011
    /*!
4012
     * Set by parser to 1 for key frames and 0 for non-key frames.
4013
     * It is initialized to -1, so if the parser doesn't set this flag,
4014
     * old-style fallback using FF_I_TYPE picture type as key frames
4015
     * will be used.
4016
     */
4017
    int key_frame;
4018

    
4019
    /**
4020
     * Time difference in stream time base units from the pts of this
4021
     * packet to the point at which the output from the decoder has converged
4022
     * independent from the availability of previous frames. That is, the
4023
     * frames are virtually identical no matter if decoding started from
4024
     * the very first frame or from this keyframe.
4025
     * Is AV_NOPTS_VALUE if unknown.
4026
     * This field is not the display duration of the current frame.
4027
     * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
4028
     * set.
4029
     *
4030
     * The purpose of this field is to allow seeking in streams that have no
4031
     * keyframes in the conventional sense. It corresponds to the
4032
     * recovery point SEI in H.264 and match_time_delta in NUT. It is also
4033
     * essential for some types of subtitle streams to ensure that all
4034
     * subtitles are correctly displayed after seeking.
4035
     */
4036
    int64_t convergence_duration;
4037

    
4038
    // Timestamp generation support:
4039
    /**
4040
     * Synchronization point for start of timestamp generation.
4041
     *
4042
     * Set to >0 for sync point, 0 for no sync point and <0 for undefined
4043
     * (default).
4044
     *
4045
     * For example, this corresponds to presence of H.264 buffering period
4046
     * SEI message.
4047
     */
4048
    int dts_sync_point;
4049

    
4050
    /**
4051
     * Offset of the current timestamp against last timestamp sync point in
4052
     * units of AVCodecContext.time_base.
4053
     *
4054
     * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
4055
     * contain a valid timestamp offset.
4056
     *
4057
     * Note that the timestamp of sync point has usually a nonzero
4058
     * dts_ref_dts_delta, which refers to the previous sync point. Offset of
4059
     * the next frame after timestamp sync point will be usually 1.
4060
     *
4061
     * For example, this corresponds to H.264 cpb_removal_delay.
4062
     */
4063
    int dts_ref_dts_delta;
4064

    
4065
    /**
4066
     * Presentation delay of current frame in units of AVCodecContext.time_base.
4067
     *
4068
     * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
4069
     * contain valid non-negative timestamp delta (presentation time of a frame
4070
     * must not lie in the past).
4071
     *
4072
     * This delay represents the difference between decoding and presentation
4073
     * time of the frame.
4074
     *
4075
     * For example, this corresponds to H.264 dpb_output_delay.
4076
     */
4077
    int pts_dts_delta;
4078

    
4079
    /**
4080
     * Position of the packet in file.
4081
     *
4082
     * Analogous to cur_frame_pts/dts
4083
     */
4084
    int64_t cur_frame_pos[AV_PARSER_PTS_NB];
4085

    
4086
    /**
4087
     * Byte position of currently parsed frame in stream.
4088
     */
4089
    int64_t pos;
4090

    
4091
    /**
4092
     * Previous frame byte position.
4093
     */
4094
    int64_t last_pos;
4095
} AVCodecParserContext;
4096

    
4097
typedef struct AVCodecParser {
4098
    int codec_ids[5]; /* several codec IDs are permitted */
4099
    int priv_data_size;
4100
    int (*parser_init)(AVCodecParserContext *s);
4101
    int (*parser_parse)(AVCodecParserContext *s,
4102
                        AVCodecContext *avctx,
4103
                        const uint8_t **poutbuf, int *poutbuf_size,
4104
                        const uint8_t *buf, int buf_size);
4105
    void (*parser_close)(AVCodecParserContext *s);
4106
    int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
4107
    struct AVCodecParser *next;
4108
} AVCodecParser;
4109

    
4110
AVCodecParser *av_parser_next(AVCodecParser *c);
4111

    
4112
void av_register_codec_parser(AVCodecParser *parser);
4113
AVCodecParserContext *av_parser_init(int codec_id);
4114

    
4115
#if LIBAVCODEC_VERSION_MAJOR < 53
4116
attribute_deprecated
4117
int av_parser_parse(AVCodecParserContext *s,
4118
                    AVCodecContext *avctx,
4119
                    uint8_t **poutbuf, int *poutbuf_size,
4120
                    const uint8_t *buf, int buf_size,
4121
                    int64_t pts, int64_t dts);
4122
#endif
4123

    
4124
/**
4125
 * Parse a packet.
4126
 *
4127
 * @param s             parser context.
4128
 * @param avctx         codec context.
4129
 * @param poutbuf       set to pointer to parsed buffer or NULL if not yet finished.
4130
 * @param poutbuf_size  set to size of parsed buffer or zero if not yet finished.
4131
 * @param buf           input buffer.
4132
 * @param buf_size      input length, to signal EOF, this should be 0 (so that the last frame can be output).
4133
 * @param pts           input presentation timestamp.
4134
 * @param dts           input decoding timestamp.
4135
 * @param pos           input byte position in stream.
4136
 * @return the number of bytes of the input bitstream used.
4137
 *
4138
 * Example:
4139
 * @code
4140
 *   while(in_len){
4141
 *       len = av_parser_parse2(myparser, AVCodecContext, &data, &size,
4142
 *                                        in_data, in_len,
4143
 *                                        pts, dts, pos);
4144
 *       in_data += len;
4145
 *       in_len  -= len;
4146
 *
4147
 *       if(size)
4148
 *          decode_frame(data, size);
4149
 *   }
4150
 * @endcode
4151
 */
4152
int av_parser_parse2(AVCodecParserContext *s,
4153
                     AVCodecContext *avctx,
4154
                     uint8_t **poutbuf, int *poutbuf_size,
4155
                     const uint8_t *buf, int buf_size,
4156
                     int64_t pts, int64_t dts,
4157
                     int64_t pos);
4158

    
4159
int av_parser_change(AVCodecParserContext *s,
4160
                     AVCodecContext *avctx,
4161
                     uint8_t **poutbuf, int *poutbuf_size,
4162
                     const uint8_t *buf, int buf_size, int keyframe);
4163
void av_parser_close(AVCodecParserContext *s);
4164

    
4165

    
4166
typedef struct AVBitStreamFilterContext {
4167
    void *priv_data;
4168
    struct AVBitStreamFilter *filter;
4169
    AVCodecParserContext *parser;
4170
    struct AVBitStreamFilterContext *next;
4171
} AVBitStreamFilterContext;
4172

    
4173

    
4174
typedef struct AVBitStreamFilter {
4175
    const char *name;
4176
    int priv_data_size;
4177
    int (*filter)(AVBitStreamFilterContext *bsfc,
4178
                  AVCodecContext *avctx, const char *args,
4179
                  uint8_t **poutbuf, int *poutbuf_size,
4180
                  const uint8_t *buf, int buf_size, int keyframe);
4181
    void (*close)(AVBitStreamFilterContext *bsfc);
4182
    struct AVBitStreamFilter *next;
4183
} AVBitStreamFilter;
4184

    
4185
void av_register_bitstream_filter(AVBitStreamFilter *bsf);
4186
AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
4187
int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
4188
                               AVCodecContext *avctx, const char *args,
4189
                               uint8_t **poutbuf, int *poutbuf_size,
4190
                               const uint8_t *buf, int buf_size, int keyframe);
4191
void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
4192

    
4193
AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f);
4194

    
4195
/* memory */
4196

    
4197
/**
4198
 * Reallocate the given block if it is not large enough, otherwise do nothing.
4199
 *
4200
 * @see av_realloc
4201
 */
4202
void *av_fast_realloc(void *ptr, unsigned int *size, FF_INTERNALC_MEM_TYPE min_size);
4203

    
4204
/**
4205
 * Allocate a buffer, reusing the given one if large enough.
4206
 *
4207
 * Contrary to av_fast_realloc the current buffer contents might not be
4208
 * preserved and on error the old buffer is freed, thus no special
4209
 * handling to avoid memleaks is necessary.
4210
 *
4211
 * @param ptr pointer to pointer to already allocated buffer, overwritten with pointer to new buffer
4212
 * @param size size of the buffer *ptr points to
4213
 * @param min_size minimum size of *ptr buffer after returning, *ptr will be NULL and
4214
 *                 *size 0 if an error occurred.
4215
 */
4216
void av_fast_malloc(void *ptr, unsigned int *size, FF_INTERNALC_MEM_TYPE min_size);
4217

    
4218
#if LIBAVCODEC_VERSION_MAJOR < 53
4219
/**
4220
 * @deprecated Deprecated in favor of av_image_copy().
4221
 */
4222
attribute_deprecated
4223
void av_picture_data_copy(uint8_t *dst_data[4], int dst_linesize[4],
4224
                          uint8_t *src_data[4], int src_linesize[4],
4225
                          enum PixelFormat pix_fmt, int width, int height);
4226
#endif
4227

    
4228
/**
4229
 * Copy image src to dst. Wraps av_picture_data_copy() above.
4230
 */
4231
void av_picture_copy(AVPicture *dst, const AVPicture *src,
4232
                     enum PixelFormat pix_fmt, int width, int height);
4233

    
4234
/**
4235
 * Crop image top and left side.
4236
 */
4237
int av_picture_crop(AVPicture *dst, const AVPicture *src,
4238
                    enum PixelFormat pix_fmt, int top_band, int left_band);
4239

    
4240
/**
4241
 * Pad image.
4242
 */
4243
int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, enum PixelFormat pix_fmt,
4244
            int padtop, int padbottom, int padleft, int padright, int *color);
4245

    
4246
/**
4247
 * Encode extradata length to a buffer. Used by xiph codecs.
4248
 *
4249
 * @param s buffer to write to; must be at least (v/255+1) bytes long
4250
 * @param v size of extradata in bytes
4251
 * @return number of bytes written to the buffer.
4252
 */
4253
unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
4254

    
4255
#if LIBAVCODEC_VERSION_MAJOR < 53
4256
/**
4257
 * Parse str and put in width_ptr and height_ptr the detected values.
4258
 *
4259
 * @deprecated Deprecated in favor of av_parse_video_size().
4260
 */
4261
attribute_deprecated int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str);
4262

    
4263
/**
4264
 * Parse str and store the detected values in *frame_rate.
4265
 *
4266
 * @deprecated Deprecated in favor of av_parse_video_rate().
4267
 */
4268
attribute_deprecated int av_parse_video_frame_rate(AVRational *frame_rate, const char *str);
4269
#endif
4270

    
4271
/**
4272
 * Logs a generic warning message about a missing feature. This function is
4273
 * intended to be used internally by FFmpeg (libavcodec, libavformat, etc.)
4274
 * only, and would normally not be used by applications.
4275
 * @param[in] avc a pointer to an arbitrary struct of which the first field is
4276
 * a pointer to an AVClass struct
4277
 * @param[in] feature string containing the name of the missing feature
4278
 * @param[in] want_sample indicates if samples are wanted which exhibit this feature.
4279
 * If want_sample is non-zero, additional verbage will be added to the log
4280
 * message which tells the user how to report samples to the development
4281
 * mailing list.
4282
 */
4283
void av_log_missing_feature(void *avc, const char *feature, int want_sample);
4284

    
4285
/**
4286
 * Log a generic warning message asking for a sample. This function is
4287
 * intended to be used internally by FFmpeg (libavcodec, libavformat, etc.)
4288
 * only, and would normally not be used by applications.
4289
 * @param[in] avc a pointer to an arbitrary struct of which the first field is
4290
 * a pointer to an AVClass struct
4291
 * @param[in] msg string containing an optional message, or NULL if no message
4292
 */
4293
void av_log_ask_for_sample(void *avc, const char *msg);
4294

    
4295
/**
4296
 * Register the hardware accelerator hwaccel.
4297
 */
4298
void av_register_hwaccel(AVHWAccel *hwaccel);
4299

    
4300
/**
4301
 * If hwaccel is NULL, returns the first registered hardware accelerator,
4302
 * if hwaccel is non-NULL, returns the next registered hardware accelerator
4303
 * after hwaccel, or NULL if hwaccel is the last one.
4304
 */
4305
AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel);
4306

    
4307

    
4308
/**
4309
 * Lock operation used by lockmgr
4310
 */
4311
enum AVLockOp {
4312
  AV_LOCK_CREATE,  ///< Create a mutex
4313
  AV_LOCK_OBTAIN,  ///< Lock the mutex
4314
  AV_LOCK_RELEASE, ///< Unlock the mutex
4315
  AV_LOCK_DESTROY, ///< Free mutex resources
4316
};
4317

    
4318
/**
4319
 * Register a user provided lock manager supporting the operations
4320
 * specified by AVLockOp. mutex points to a (void *) where the
4321
 * lockmgr should store/get a pointer to a user allocated mutex. It's
4322
 * NULL upon AV_LOCK_CREATE and != NULL for all other ops.
4323
 *
4324
 * @param cb User defined callback. Note: FFmpeg may invoke calls to this
4325
 *           callback during the call to av_lockmgr_register().
4326
 *           Thus, the application must be prepared to handle that.
4327
 *           If cb is set to NULL the lockmgr will be unregistered.
4328
 *           Also note that during unregistration the previously registered
4329
 *           lockmgr callback may also be invoked.
4330
 */
4331
int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op));
4332

    
4333
#endif /* AVCODEC_AVCODEC_H */