Statistics
| Branch: | Revision:

ffmpeg / libavcodec / avcodec.h @ 9dc92a38

History | View | Annotate | Download (92.6 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 FFMPEG_AVCODEC_H
22
#define FFMPEG_AVCODEC_H
23

    
24
/**
25
 * @file avcodec.h
26
 * external API header
27
 */
28

    
29

    
30
#include "libavutil/avutil.h"
31
#include <sys/types.h> /* size_t */
32

    
33
#define LIBAVCODEC_VERSION_MAJOR 51
34
#define LIBAVCODEC_VERSION_MINOR 51
35
#define LIBAVCODEC_VERSION_MICRO  0
36

    
37
#define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
38
                                               LIBAVCODEC_VERSION_MINOR, \
39
                                               LIBAVCODEC_VERSION_MICRO)
40
#define LIBAVCODEC_VERSION      AV_VERSION(LIBAVCODEC_VERSION_MAJOR,    \
41
                                           LIBAVCODEC_VERSION_MINOR,    \
42
                                           LIBAVCODEC_VERSION_MICRO)
43
#define LIBAVCODEC_BUILD        LIBAVCODEC_VERSION_INT
44

    
45
#define LIBAVCODEC_IDENT        "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
46

    
47
#define AV_NOPTS_VALUE          INT64_C(0x8000000000000000)
48
#define AV_TIME_BASE            1000000
49
#define AV_TIME_BASE_Q          (AVRational){1, AV_TIME_BASE}
50

    
51
/**
52
 * Identifies the syntax and semantics of the bitstream.
53
 * The principle is roughly:
54
 * Two decoders with the same ID can decode the same streams.
55
 * Two encoders with the same ID can encode compatible streams.
56
 * There may be slight deviations from the principle due to implementation
57
 * details.
58
 *
59
 * If you add a codec ID to this list, add it so that
60
 * 1. no value of a existing codec ID changes (that would break ABI),
61
 * 2. it is as close as possible to similar codecs.
62
 */
63
enum CodecID {
64
    CODEC_ID_NONE,
65
    CODEC_ID_MPEG1VIDEO,
66
    CODEC_ID_MPEG2VIDEO, ///< preferred ID for MPEG-1/2 video decoding
67
    CODEC_ID_MPEG2VIDEO_XVMC,
68
    CODEC_ID_H261,
69
    CODEC_ID_H263,
70
    CODEC_ID_RV10,
71
    CODEC_ID_RV20,
72
    CODEC_ID_MJPEG,
73
    CODEC_ID_MJPEGB,
74
    CODEC_ID_LJPEG,
75
    CODEC_ID_SP5X,
76
    CODEC_ID_JPEGLS,
77
    CODEC_ID_MPEG4,
78
    CODEC_ID_RAWVIDEO,
79
    CODEC_ID_MSMPEG4V1,
80
    CODEC_ID_MSMPEG4V2,
81
    CODEC_ID_MSMPEG4V3,
82
    CODEC_ID_WMV1,
83
    CODEC_ID_WMV2,
84
    CODEC_ID_H263P,
85
    CODEC_ID_H263I,
86
    CODEC_ID_FLV1,
87
    CODEC_ID_SVQ1,
88
    CODEC_ID_SVQ3,
89
    CODEC_ID_DVVIDEO,
90
    CODEC_ID_HUFFYUV,
91
    CODEC_ID_CYUV,
92
    CODEC_ID_H264,
93
    CODEC_ID_INDEO3,
94
    CODEC_ID_VP3,
95
    CODEC_ID_THEORA,
96
    CODEC_ID_ASV1,
97
    CODEC_ID_ASV2,
98
    CODEC_ID_FFV1,
99
    CODEC_ID_4XM,
100
    CODEC_ID_VCR1,
101
    CODEC_ID_CLJR,
102
    CODEC_ID_MDEC,
103
    CODEC_ID_ROQ,
104
    CODEC_ID_INTERPLAY_VIDEO,
105
    CODEC_ID_XAN_WC3,
106
    CODEC_ID_XAN_WC4,
107
    CODEC_ID_RPZA,
108
    CODEC_ID_CINEPAK,
109
    CODEC_ID_WS_VQA,
110
    CODEC_ID_MSRLE,
111
    CODEC_ID_MSVIDEO1,
112
    CODEC_ID_IDCIN,
113
    CODEC_ID_8BPS,
114
    CODEC_ID_SMC,
115
    CODEC_ID_FLIC,
116
    CODEC_ID_TRUEMOTION1,
117
    CODEC_ID_VMDVIDEO,
118
    CODEC_ID_MSZH,
119
    CODEC_ID_ZLIB,
120
    CODEC_ID_QTRLE,
121
    CODEC_ID_SNOW,
122
    CODEC_ID_TSCC,
123
    CODEC_ID_ULTI,
124
    CODEC_ID_QDRAW,
125
    CODEC_ID_VIXL,
126
    CODEC_ID_QPEG,
127
    CODEC_ID_XVID,
128
    CODEC_ID_PNG,
129
    CODEC_ID_PPM,
130
    CODEC_ID_PBM,
131
    CODEC_ID_PGM,
132
    CODEC_ID_PGMYUV,
133
    CODEC_ID_PAM,
134
    CODEC_ID_FFVHUFF,
135
    CODEC_ID_RV30,
136
    CODEC_ID_RV40,
137
    CODEC_ID_VC1,
138
    CODEC_ID_WMV3,
139
    CODEC_ID_LOCO,
140
    CODEC_ID_WNV1,
141
    CODEC_ID_AASC,
142
    CODEC_ID_INDEO2,
143
    CODEC_ID_FRAPS,
144
    CODEC_ID_TRUEMOTION2,
145
    CODEC_ID_BMP,
146
    CODEC_ID_CSCD,
147
    CODEC_ID_MMVIDEO,
148
    CODEC_ID_ZMBV,
149
    CODEC_ID_AVS,
150
    CODEC_ID_SMACKVIDEO,
151
    CODEC_ID_NUV,
152
    CODEC_ID_KMVC,
153
    CODEC_ID_FLASHSV,
154
    CODEC_ID_CAVS,
155
    CODEC_ID_JPEG2000,
156
    CODEC_ID_VMNC,
157
    CODEC_ID_VP5,
158
    CODEC_ID_VP6,
159
    CODEC_ID_VP6F,
160
    CODEC_ID_TARGA,
161
    CODEC_ID_DSICINVIDEO,
162
    CODEC_ID_TIERTEXSEQVIDEO,
163
    CODEC_ID_TIFF,
164
    CODEC_ID_GIF,
165
    CODEC_ID_FFH264,
166
    CODEC_ID_DXA,
167
    CODEC_ID_DNXHD,
168
    CODEC_ID_THP,
169
    CODEC_ID_SGI,
170
    CODEC_ID_C93,
171
    CODEC_ID_BETHSOFTVID,
172
    CODEC_ID_PTX,
173
    CODEC_ID_TXD,
174
    CODEC_ID_VP6A,
175
    CODEC_ID_AMV,
176
    CODEC_ID_VB,
177
    CODEC_ID_PCX,
178
    CODEC_ID_SUNRAST,
179
    CODEC_ID_INDEO4,
180
    CODEC_ID_INDEO5,
181

    
182
    /* various PCM "codecs" */
183
    CODEC_ID_PCM_S16LE= 0x10000,
184
    CODEC_ID_PCM_S16BE,
185
    CODEC_ID_PCM_U16LE,
186
    CODEC_ID_PCM_U16BE,
187
    CODEC_ID_PCM_S8,
188
    CODEC_ID_PCM_U8,
189
    CODEC_ID_PCM_MULAW,
190
    CODEC_ID_PCM_ALAW,
191
    CODEC_ID_PCM_S32LE,
192
    CODEC_ID_PCM_S32BE,
193
    CODEC_ID_PCM_U32LE,
194
    CODEC_ID_PCM_U32BE,
195
    CODEC_ID_PCM_S24LE,
196
    CODEC_ID_PCM_S24BE,
197
    CODEC_ID_PCM_U24LE,
198
    CODEC_ID_PCM_U24BE,
199
    CODEC_ID_PCM_S24DAUD,
200
    CODEC_ID_PCM_ZORK,
201
    CODEC_ID_PCM_S16LE_PLANAR,
202

    
203
    /* various ADPCM codecs */
204
    CODEC_ID_ADPCM_IMA_QT= 0x11000,
205
    CODEC_ID_ADPCM_IMA_WAV,
206
    CODEC_ID_ADPCM_IMA_DK3,
207
    CODEC_ID_ADPCM_IMA_DK4,
208
    CODEC_ID_ADPCM_IMA_WS,
209
    CODEC_ID_ADPCM_IMA_SMJPEG,
210
    CODEC_ID_ADPCM_MS,
211
    CODEC_ID_ADPCM_4XM,
212
    CODEC_ID_ADPCM_XA,
213
    CODEC_ID_ADPCM_ADX,
214
    CODEC_ID_ADPCM_EA,
215
    CODEC_ID_ADPCM_G726,
216
    CODEC_ID_ADPCM_CT,
217
    CODEC_ID_ADPCM_SWF,
218
    CODEC_ID_ADPCM_YAMAHA,
219
    CODEC_ID_ADPCM_SBPRO_4,
220
    CODEC_ID_ADPCM_SBPRO_3,
221
    CODEC_ID_ADPCM_SBPRO_2,
222
    CODEC_ID_ADPCM_THP,
223
    CODEC_ID_ADPCM_IMA_AMV,
224
    CODEC_ID_ADPCM_EA_R1,
225
    CODEC_ID_ADPCM_EA_R3,
226
    CODEC_ID_ADPCM_EA_R2,
227
    CODEC_ID_ADPCM_IMA_EA_SEAD,
228
    CODEC_ID_ADPCM_IMA_EA_EACS,
229
    CODEC_ID_ADPCM_EA_XAS,
230

    
231
    /* AMR */
232
    CODEC_ID_AMR_NB= 0x12000,
233
    CODEC_ID_AMR_WB,
234

    
235
    /* RealAudio codecs*/
236
    CODEC_ID_RA_144= 0x13000,
237
    CODEC_ID_RA_288,
238

    
239
    /* various DPCM codecs */
240
    CODEC_ID_ROQ_DPCM= 0x14000,
241
    CODEC_ID_INTERPLAY_DPCM,
242
    CODEC_ID_XAN_DPCM,
243
    CODEC_ID_SOL_DPCM,
244

    
245
    CODEC_ID_MP2= 0x15000,
246
    CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3
247
    CODEC_ID_AAC,
248
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
249
    CODEC_ID_MPEG4AAC,
250
#endif
251
    CODEC_ID_AC3,
252
    CODEC_ID_DTS,
253
    CODEC_ID_VORBIS,
254
    CODEC_ID_DVAUDIO,
255
    CODEC_ID_WMAV1,
256
    CODEC_ID_WMAV2,
257
    CODEC_ID_MACE3,
258
    CODEC_ID_MACE6,
259
    CODEC_ID_VMDAUDIO,
260
    CODEC_ID_SONIC,
261
    CODEC_ID_SONIC_LS,
262
    CODEC_ID_FLAC,
263
    CODEC_ID_MP3ADU,
264
    CODEC_ID_MP3ON4,
265
    CODEC_ID_SHORTEN,
266
    CODEC_ID_ALAC,
267
    CODEC_ID_WESTWOOD_SND1,
268
    CODEC_ID_GSM, ///< as in Berlin toast format
269
    CODEC_ID_QDM2,
270
    CODEC_ID_COOK,
271
    CODEC_ID_TRUESPEECH,
272
    CODEC_ID_TTA,
273
    CODEC_ID_SMACKAUDIO,
274
    CODEC_ID_QCELP,
275
    CODEC_ID_WAVPACK,
276
    CODEC_ID_DSICINAUDIO,
277
    CODEC_ID_IMC,
278
    CODEC_ID_MUSEPACK7,
279
    CODEC_ID_MLP,
280
    CODEC_ID_GSM_MS, /* as found in WAV */
281
    CODEC_ID_ATRAC3,
282
    CODEC_ID_VOXWARE,
283
    CODEC_ID_APE,
284
    CODEC_ID_NELLYMOSER,
285
    CODEC_ID_MUSEPACK8,
286
    CODEC_ID_SPEEX,
287
    CODEC_ID_WMAVOICE,
288
    CODEC_ID_WMAPRO,
289
    CODEC_ID_WMALOSSLESS,
290

    
291
    /* subtitle codecs */
292
    CODEC_ID_DVD_SUBTITLE= 0x17000,
293
    CODEC_ID_DVB_SUBTITLE,
294
    CODEC_ID_TEXT,  ///< raw UTF-8 text
295
    CODEC_ID_XSUB,
296
    CODEC_ID_SSA,
297
    CODEC_ID_MOV_TEXT,
298

    
299
    /* other specific kind of codecs (generaly used for attachments) */
300
    CODEC_ID_TTF= 0x18000,
301

    
302
    CODEC_ID_MPEG2TS= 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS
303
                                * stream (only used by libavformat) */
304
};
305

    
306
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
307
/* CODEC_ID_MP3LAME is obsolete */
308
#define CODEC_ID_MP3LAME CODEC_ID_MP3
309
#define CODEC_ID_MPEG4AAC CODEC_ID_AAC
310
#endif
311

    
312
enum CodecType {
313
    CODEC_TYPE_UNKNOWN = -1,
314
    CODEC_TYPE_VIDEO,
315
    CODEC_TYPE_AUDIO,
316
    CODEC_TYPE_DATA,
317
    CODEC_TYPE_SUBTITLE,
318
    CODEC_TYPE_ATTACHMENT,
319
    CODEC_TYPE_NB
320
};
321

    
322
/**
323
 * Currently unused, may be used if 24/32 bits samples are ever supported.
324
 * all in native-endian format
325
 */
326
enum SampleFormat {
327
    SAMPLE_FMT_NONE = -1,
328
    SAMPLE_FMT_U8,              ///< unsigned 8 bits
329
    SAMPLE_FMT_S16,             ///< signed 16 bits
330
    SAMPLE_FMT_S24,             ///< signed 24 bits
331
    SAMPLE_FMT_S32,             ///< signed 32 bits
332
    SAMPLE_FMT_FLT,             ///< float
333
};
334

    
335
/* in bytes */
336
#define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
337

    
338
/**
339
 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
340
 * This is mainly needed because some optimized bitstream readers read
341
 * 32 or 64 bit at once and could read over the end.<br>
342
 * Note: If the first 23 bits of the additional bytes are not 0, then damaged
343
 * MPEG bitstreams could cause overread and segfault.
344
 */
345
#define FF_INPUT_BUFFER_PADDING_SIZE 8
346

    
347
/**
348
 * minimum encoding buffer size
349
 * Used to avoid some checks during header writing.
350
 */
351
#define FF_MIN_BUFFER_SIZE 16384
352

    
353
/**
354
 * motion estimation type.
355
 */
356
enum Motion_Est_ID {
357
    ME_ZERO = 1,    ///< no search, that is use 0,0 vector whenever one is needed
358
    ME_FULL,
359
    ME_LOG,
360
    ME_PHODS,
361
    ME_EPZS,        ///< enhanced predictive zonal search
362
    ME_X1,          ///< reserved for experiments
363
    ME_HEX,         ///< hexagon based search
364
    ME_UMH,         ///< uneven multi-hexagon search
365
    ME_ITER,        ///< iterative search
366
};
367

    
368
enum AVDiscard{
369
    /* We leave some space between them for extensions (drop some
370
     * keyframes for intra-only or drop just some bidir frames). */
371
    AVDISCARD_NONE   =-16, ///< discard nothing
372
    AVDISCARD_DEFAULT=  0, ///< discard useless packets like 0 size packets in avi
373
    AVDISCARD_NONREF =  8, ///< discard all non reference
374
    AVDISCARD_BIDIR  = 16, ///< discard all bidirectional frames
375
    AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
376
    AVDISCARD_ALL    = 48, ///< discard all
377
};
378

    
379
typedef struct RcOverride{
380
    int start_frame;
381
    int end_frame;
382
    int qscale; // If this is 0 then quality_factor will be used instead.
383
    float quality_factor;
384
} RcOverride;
385

    
386
#define FF_MAX_B_FRAMES 16
387

    
388
/* encoding support
389
   These flags can be passed in AVCodecContext.flags before initialization.
390
   Note: Not everything is supported yet.
391
*/
392

    
393
#define CODEC_FLAG_QSCALE 0x0002  ///< Use fixed qscale.
394
#define CODEC_FLAG_4MV    0x0004  ///< 4 MV per MB allowed / advanced prediction for H.263.
395
#define CODEC_FLAG_QPEL   0x0010  ///< Use qpel MC.
396
#define CODEC_FLAG_GMC    0x0020  ///< Use GMC.
397
#define CODEC_FLAG_MV0    0x0040  ///< Always try a MB with MV=<0,0>.
398
#define CODEC_FLAG_PART   0x0080  ///< Use data partitioning.
399
/**
400
 * The parent program guarantees that the input for B-frames containing
401
 * streams is not written to for at least s->max_b_frames+1 frames, if
402
 * this is not set the input will be copied.
403
 */
404
#define CODEC_FLAG_INPUT_PRESERVED 0x0100
405
#define CODEC_FLAG_PASS1           0x0200   ///< Use internal 2pass ratecontrol in first pass mode.
406
#define CODEC_FLAG_PASS2           0x0400   ///< Use internal 2pass ratecontrol in second pass mode.
407
#define CODEC_FLAG_EXTERN_HUFF     0x1000   ///< Use external Huffman table (for MJPEG).
408
#define CODEC_FLAG_GRAY            0x2000   ///< Only decode/encode grayscale.
409
#define CODEC_FLAG_EMU_EDGE        0x4000   ///< Don't draw edges.
410
#define CODEC_FLAG_PSNR            0x8000   ///< error[?] variables will be set during encoding.
411
#define CODEC_FLAG_TRUNCATED       0x00010000 /** Input bitstream might be truncated at a random
412
                                                  location instead of only at frame boundaries. */
413
#define CODEC_FLAG_NORMALIZE_AQP  0x00020000 ///< Normalize adaptive quantization.
414
#define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT.
415
#define CODEC_FLAG_LOW_DELAY      0x00080000 ///< Force low delay.
416
#define CODEC_FLAG_ALT_SCAN       0x00100000 ///< Use alternate scan.
417
#define CODEC_FLAG_TRELLIS_QUANT  0x00200000 ///< Use trellis quantization.
418
#define CODEC_FLAG_GLOBAL_HEADER  0x00400000 ///< Place global headers in extradata instead of every keyframe.
419
#define CODEC_FLAG_BITEXACT       0x00800000 ///< Use only bitexact stuff (except (I)DCT).
420
/* Fx : Flag for h263+ extra options */
421
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
422
#define CODEC_FLAG_H263P_AIC      0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction (remove this)
423
#endif
424
#define CODEC_FLAG_AC_PRED        0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction
425
#define CODEC_FLAG_H263P_UMV      0x02000000 ///< unlimited motion vector
426
#define CODEC_FLAG_CBP_RD         0x04000000 ///< Use rate distortion optimization for cbp.
427
#define CODEC_FLAG_QP_RD          0x08000000 ///< Use rate distortion optimization for qp selectioon.
428
#define CODEC_FLAG_H263P_AIV      0x00000008 ///< H.263 alternative inter VLC
429
#define CODEC_FLAG_OBMC           0x00000001 ///< OBMC
430
#define CODEC_FLAG_LOOP_FILTER    0x00000800 ///< loop filter
431
#define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
432
#define CODEC_FLAG_INTERLACED_ME  0x20000000 ///< interlaced motion estimation
433
#define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< Will reserve space for SVCD scan offset user data.
434
#define CODEC_FLAG_CLOSED_GOP     ((int)0x80000000)
435
#define CODEC_FLAG2_FAST          0x00000001 ///< Allow non spec compliant speedup tricks.
436
#define CODEC_FLAG2_STRICT_GOP    0x00000002 ///< Strictly enforce GOP size.
437
#define CODEC_FLAG2_NO_OUTPUT     0x00000004 ///< Skip bitstream encoding.
438
#define CODEC_FLAG2_LOCAL_HEADER  0x00000008 ///< Place global headers at every keyframe instead of in extradata.
439
#define CODEC_FLAG2_BPYRAMID      0x00000010 ///< H.264 allow B-frames to be used as references.
440
#define CODEC_FLAG2_WPRED         0x00000020 ///< H.264 weighted biprediction for B-frames
441
#define CODEC_FLAG2_MIXED_REFS    0x00000040 ///< H.264 one reference per partition, as opposed to one reference per macroblock
442
#define CODEC_FLAG2_8X8DCT        0x00000080 ///< H.264 high profile 8x8 transform
443
#define CODEC_FLAG2_FASTPSKIP     0x00000100 ///< H.264 fast pskip
444
#define CODEC_FLAG2_AUD           0x00000200 ///< H.264 access unit delimiters
445
#define CODEC_FLAG2_BRDO          0x00000400 ///< B-frame rate-distortion optimization
446
#define CODEC_FLAG2_INTRA_VLC     0x00000800 ///< Use MPEG-2 intra VLC table.
447
#define CODEC_FLAG2_MEMC_ONLY     0x00001000 ///< Only do ME/MC (I frames -> ref, P frame -> ME+MC).
448
#define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format.
449
#define CODEC_FLAG2_SKIP_RD       0x00004000 ///< RD optimal MB level residual skipping
450
#define CODEC_FLAG2_CHUNKS        0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
451
#define CODEC_FLAG2_NON_LINEAR_QUANT 0x00010000 ///< Use MPEG-2 nonlinear quantizer.
452
#define CODEC_FLAG2_BIT_RESERVOIR 0x00020000 ///< Use a bit reservoir when encoding if possible
453

    
454
/* Unsupported options :
455
 *              Syntax Arithmetic coding (SAC)
456
 *              Reference Picture Selection
457
 *              Independent Segment Decoding */
458
/* /Fx */
459
/* codec capabilities */
460

    
461
#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback.
462
/**
463
 * Codec uses get_buffer() for allocating buffers.
464
 * direct rendering method 1
465
 */
466
#define CODEC_CAP_DR1             0x0002
467
/* If 'parse_only' field is true, then avcodec_parse_frame() can be used. */
468
#define CODEC_CAP_PARSE_ONLY      0x0004
469
#define CODEC_CAP_TRUNCATED       0x0008
470
/* Codec can export data for HW decoding (XvMC). */
471
#define CODEC_CAP_HWACCEL         0x0010
472
/**
473
 * Codec has a nonzero delay and needs to be fed with NULL at the end to get the delayed data.
474
 * If this is not set, the codec is guaranteed to never be fed with NULL data.
475
 */
476
#define CODEC_CAP_DELAY           0x0020
477
/**
478
 * Codec can be fed a final frame with a smaller size.
479
 * This can be used to prevent truncation of the last audio samples.
480
 */
481
#define CODEC_CAP_SMALL_LAST_FRAME 0x0040
482

    
483
//The following defines may change, don't expect compatibility if you use them.
484
#define MB_TYPE_INTRA4x4   0x0001
485
#define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
486
#define MB_TYPE_INTRA_PCM  0x0004 //FIXME H.264-specific
487
#define MB_TYPE_16x16      0x0008
488
#define MB_TYPE_16x8       0x0010
489
#define MB_TYPE_8x16       0x0020
490
#define MB_TYPE_8x8        0x0040
491
#define MB_TYPE_INTERLACED 0x0080
492
#define MB_TYPE_DIRECT2    0x0100 //FIXME
493
#define MB_TYPE_ACPRED     0x0200
494
#define MB_TYPE_GMC        0x0400
495
#define MB_TYPE_SKIP       0x0800
496
#define MB_TYPE_P0L0       0x1000
497
#define MB_TYPE_P1L0       0x2000
498
#define MB_TYPE_P0L1       0x4000
499
#define MB_TYPE_P1L1       0x8000
500
#define MB_TYPE_L0         (MB_TYPE_P0L0 | MB_TYPE_P1L0)
501
#define MB_TYPE_L1         (MB_TYPE_P0L1 | MB_TYPE_P1L1)
502
#define MB_TYPE_L0L1       (MB_TYPE_L0   | MB_TYPE_L1)
503
#define MB_TYPE_QUANT      0x00010000
504
#define MB_TYPE_CBP        0x00020000
505
//Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
506

    
507
/**
508
 * Pan Scan area.
509
 * This specifies the area which should be displayed.
510
 * Note there may be multiple such areas for one frame.
511
 */
512
typedef struct AVPanScan{
513
    /**
514
     * id
515
     * - encoding: Set by user.
516
     * - decoding: Set by libavcodec.
517
     */
518
    int id;
519

    
520
    /**
521
     * width and height in 1/16 pel
522
     * - encoding: Set by user.
523
     * - decoding: Set by libavcodec.
524
     */
525
    int width;
526
    int height;
527

    
528
    /**
529
     * position of the top left corner in 1/16 pel for up to 3 fields/frames
530
     * - encoding: Set by user.
531
     * - decoding: Set by libavcodec.
532
     */
533
    int16_t position[3][2];
534
}AVPanScan;
535

    
536
#define FF_COMMON_FRAME \
537
    /**\
538
     * pointer to the picture planes.\
539
     * This might be different from the first allocated byte\
540
     * - encoding: \
541
     * - decoding: \
542
     */\
543
    uint8_t *data[4];\
544
    int linesize[4];\
545
    /**\
546
     * pointer to the first allocated byte of the picture. Can be used in get_buffer/release_buffer.\
547
     * This isn't used by libavcodec unless the default get/release_buffer() is used.\
548
     * - encoding: \
549
     * - decoding: \
550
     */\
551
    uint8_t *base[4];\
552
    /**\
553
     * 1 -> keyframe, 0-> not\
554
     * - encoding: Set by libavcodec.\
555
     * - decoding: Set by libavcodec.\
556
     */\
557
    int key_frame;\
558
\
559
    /**\
560
     * Picture type of the frame, see ?_TYPE below.\
561
     * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
562
     * - decoding: Set by libavcodec.\
563
     */\
564
    int pict_type;\
565
\
566
    /**\
567
     * presentation timestamp in time_base units (time when frame should be shown to user)\
568
     * If AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed.\
569
     * - encoding: MUST be set by user.\
570
     * - decoding: Set by libavcodec.\
571
     */\
572
    int64_t pts;\
573
\
574
    /**\
575
     * picture number in bitstream order\
576
     * - encoding: set by\
577
     * - decoding: Set by libavcodec.\
578
     */\
579
    int coded_picture_number;\
580
    /**\
581
     * picture number in display order\
582
     * - encoding: set by\
583
     * - decoding: Set by libavcodec.\
584
     */\
585
    int display_picture_number;\
586
\
587
    /**\
588
     * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
589
     * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
590
     * - decoding: Set by libavcodec.\
591
     */\
592
    int quality; \
593
\
594
    /**\
595
     * buffer age (1->was last buffer and dint change, 2->..., ...).\
596
     * Set to INT_MAX if the buffer has not been used yet.\
597
     * - encoding: unused\
598
     * - decoding: MUST be set by get_buffer().\
599
     */\
600
    int age;\
601
\
602
    /**\
603
     * is this picture used as reference\
604
     * - encoding: unused\
605
     * - decoding: Set by libavcodec. (before get_buffer() call)).\
606
     */\
607
    int reference;\
608
\
609
    /**\
610
     * QP table\
611
     * - encoding: unused\
612
     * - decoding: Set by libavcodec.\
613
     */\
614
    int8_t *qscale_table;\
615
    /**\
616
     * QP store stride\
617
     * - encoding: unused\
618
     * - decoding: Set by libavcodec.\
619
     */\
620
    int qstride;\
621
\
622
    /**\
623
     * mbskip_table[mb]>=1 if MB didn't change\
624
     * stride= mb_width = (width+15)>>4\
625
     * - encoding: unused\
626
     * - decoding: Set by libavcodec.\
627
     */\
628
    uint8_t *mbskip_table;\
629
\
630
    /**\
631
     * motion vector table\
632
     * @code\
633
     * example:\
634
     * int mv_sample_log2= 4 - motion_subsample_log2;\
635
     * int mb_width= (width+15)>>4;\
636
     * int mv_stride= (mb_width << mv_sample_log2) + 1;\
637
     * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
638
     * @endcode\
639
     * - encoding: Set by user.\
640
     * - decoding: Set by libavcodec.\
641
     */\
642
    int16_t (*motion_val[2])[2];\
643
\
644
    /**\
645
     * macroblock type table\
646
     * mb_type_base + mb_width + 2\
647
     * - encoding: Set by user.\
648
     * - decoding: Set by libavcodec.\
649
     */\
650
    uint32_t *mb_type;\
651
\
652
    /**\
653
     * log2 of the size of the block which a single vector in motion_val represents: \
654
     * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
655
     * - encoding: unused\
656
     * - decoding: Set by libavcodec.\
657
     */\
658
    uint8_t motion_subsample_log2;\
659
\
660
    /**\
661
     * for some private data of the user\
662
     * - encoding: unused\
663
     * - decoding: Set by user.\
664
     */\
665
    void *opaque;\
666
\
667
    /**\
668
     * error\
669
     * - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR.\
670
     * - decoding: unused\
671
     */\
672
    uint64_t error[4];\
673
\
674
    /**\
675
     * type of the buffer (to keep track of who has to deallocate data[*])\
676
     * - encoding: Set by the one who allocates it.\
677
     * - decoding: Set by the one who allocates it.\
678
     * Note: User allocated (direct rendering) & internal buffers cannot coexist currently.\
679
     */\
680
    int type;\
681
    \
682
    /**\
683
     * When decoding, this signals how much the picture must be delayed.\
684
     * extra_delay = repeat_pict / (2*fps)\
685
     * - encoding: unused\
686
     * - decoding: Set by libavcodec.\
687
     */\
688
    int repeat_pict;\
689
    \
690
    /**\
691
     * \
692
     */\
693
    int qscale_type;\
694
    \
695
    /**\
696
     * The content of the picture is interlaced.\
697
     * - encoding: Set by user.\
698
     * - decoding: Set by libavcodec. (default 0)\
699
     */\
700
    int interlaced_frame;\
701
    \
702
    /**\
703
     * If the content is interlaced, is top field displayed first.\
704
     * - encoding: Set by user.\
705
     * - decoding: Set by libavcodec.\
706
     */\
707
    int top_field_first;\
708
    \
709
    /**\
710
     * Pan scan.\
711
     * - encoding: Set by user.\
712
     * - decoding: Set by libavcodec.\
713
     */\
714
    AVPanScan *pan_scan;\
715
    \
716
    /**\
717
     * Tell user application that palette has changed from previous frame.\
718
     * - encoding: ??? (no palette-enabled encoder yet)\
719
     * - decoding: Set by libavcodec. (default 0).\
720
     */\
721
    int palette_has_changed;\
722
    \
723
    /**\
724
     * codec suggestion on buffer type if != 0\
725
     * - encoding: unused\
726
     * - decoding: Set by libavcodec. (before get_buffer() call)).\
727
     */\
728
    int buffer_hints;\
729
\
730
    /**\
731
     * DCT coefficients\
732
     * - encoding: unused\
733
     * - decoding: Set by libavcodec.\
734
     */\
735
    short *dct_coeff;\
736
\
737
    /**\
738
     * motion referece frame index\
739
     * - encoding: Set by user.\
740
     * - decoding: Set by libavcodec.\
741
     */\
742
    int8_t *ref_index[2];
743

    
744
#define FF_QSCALE_TYPE_MPEG1 0
745
#define FF_QSCALE_TYPE_MPEG2 1
746
#define FF_QSCALE_TYPE_H264  2
747

    
748
#define FF_BUFFER_TYPE_INTERNAL 1
749
#define FF_BUFFER_TYPE_USER     2 ///< direct rendering buffers (image is (de)allocated by user)
750
#define FF_BUFFER_TYPE_SHARED   4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared.
751
#define FF_BUFFER_TYPE_COPY     8 ///< Just a (modified) copy of some other buffer, don't deallocate anything.
752

    
753

    
754
#define FF_I_TYPE  1 ///< Intra
755
#define FF_P_TYPE  2 ///< Predicted
756
#define FF_B_TYPE  3 ///< Bi-dir predicted
757
#define FF_S_TYPE  4 ///< S(GMC)-VOP MPEG4
758
#define FF_SI_TYPE 5 ///< Switching Intra
759
#define FF_SP_TYPE 6 ///< Switching Predicted
760
#define FF_BI_TYPE 7
761

    
762
#define FF_BUFFER_HINTS_VALID    0x01 // Buffer hints value is meaningful (if 0 ignore).
763
#define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer.
764
#define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content.
765
#define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update).
766

    
767
/**
768
 * Audio Video Frame.
769
 * New fields can be added to the end of FF_COMMON_FRAME with minor version
770
 * bumps.
771
 * Removal, reordering and changes to existing fields require a major
772
 * version bump. No fields should be added into AVFrame before or after
773
 * FF_COMMON_FRAME!
774
 * sizeof(AVFrame) must not be used outside libav*.
775
 */
776
typedef struct AVFrame {
777
    FF_COMMON_FRAME
778
} AVFrame;
779

    
780
#define DEFAULT_FRAME_RATE_BASE 1001000
781

    
782
/**
783
 * main external API structure.
784
 * New fields can be added to the end with minor version bumps.
785
 * Removal, reordering and changes to existing fields require a major
786
 * version bump.
787
 * sizeof(AVCodecContext) must not be used outside libav*.
788
 */
789
typedef struct AVCodecContext {
790
    /**
791
     * information on struct for av_log
792
     * - set by avcodec_alloc_context
793
     */
794
    AVClass *av_class;
795
    /**
796
     * the average bitrate
797
     * - encoding: Set by user; unused for constant quantizer encoding.
798
     * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.
799
     */
800
    int bit_rate;
801

    
802
    /**
803
     * number of bits the bitstream is allowed to diverge from the reference.
804
     *           the reference can be CBR (for CBR pass1) or VBR (for pass2)
805
     * - encoding: Set by user; unused for constant quantizer encoding.
806
     * - decoding: unused
807
     */
808
    int bit_rate_tolerance;
809

    
810
    /**
811
     * CODEC_FLAG_*.
812
     * - encoding: Set by user.
813
     * - decoding: Set by user.
814
     */
815
    int flags;
816

    
817
    /**
818
     * Some codecs need additional format info. It is stored here.
819
     * If any muxer uses this then ALL demuxers/parsers AND encoders for the
820
     * specific codec MUST set it correctly otherwise stream copy breaks.
821
     * In general use of this field by muxers is not recommanded.
822
     * - encoding: Set by libavcodec.
823
     * - decoding: Set by libavcodec. (FIXME: Is this OK?)
824
     */
825
    int sub_id;
826

    
827
    /**
828
     * Motion estimation algorithm used for video coding.
829
     * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
830
     * 8 (umh), 9 (iter) [7, 8 are x264 specific, 9 is snow specific]
831
     * - encoding: MUST be set by user.
832
     * - decoding: unused
833
     */
834
    int me_method;
835

    
836
    /**
837
     * some codecs need / can use extradata like Huffman tables.
838
     * mjpeg: Huffman tables
839
     * rv10: additional flags
840
     * mpeg4: global headers (they can be in the bitstream or here)
841
     * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
842
     * than extradata_size to avoid prolems if it is read with the bitstream reader.
843
     * The bytewise contents of extradata must not depend on the architecture or CPU endianness.
844
     * - encoding: Set/allocated/freed by libavcodec.
845
     * - decoding: Set/allocated/freed by user.
846
     */
847
    uint8_t *extradata;
848
    int extradata_size;
849

    
850
    /**
851
     * This is the fundamental unit of time (in seconds) in terms
852
     * of which frame timestamps are represented. For fixed-fps content,
853
     * timebase should be 1/framerate and timestamp increments should be
854
     * identically 1.
855
     * - encoding: MUST be set by user.
856
     * - decoding: Set by libavcodec.
857
     */
858
    AVRational time_base;
859

    
860
    /* video only */
861
    /**
862
     * picture width / height.
863
     * - encoding: MUST be set by user.
864
     * - decoding: Set by libavcodec.
865
     * Note: For compatibility it is possible to set this instead of
866
     * coded_width/height before decoding.
867
     */
868
    int width, height;
869

    
870
#define FF_ASPECT_EXTENDED 15
871

    
872
    /**
873
     * the number of pictures in a group of pictures, or 0 for intra_only
874
     * - encoding: Set by user.
875
     * - decoding: unused
876
     */
877
    int gop_size;
878

    
879
    /**
880
     * Pixel format, see PIX_FMT_xxx.
881
     * - encoding: Set by user.
882
     * - decoding: Set by libavcodec.
883
     */
884
    enum PixelFormat pix_fmt;
885

    
886
    /**
887
     * Frame rate emulation. If not zero, the lower layer (i.e. format handler)
888
     * has to read frames at native frame rate.
889
     * - encoding: Set by user.
890
     * - decoding: unused
891
     */
892
    int rate_emu;
893

    
894
    /**
895
     * If non NULL, 'draw_horiz_band' is called by the libavcodec
896
     * decoder to draw a horizontal band. It improves cache usage. Not
897
     * all codecs can do that. You must check the codec capabilities
898
     * beforehand.
899
     * - encoding: unused
900
     * - decoding: Set by user.
901
     * @param height the height of the slice
902
     * @param y the y position of the slice
903
     * @param type 1->top field, 2->bottom field, 3->frame
904
     * @param offset offset into the AVFrame.data from which the slice should be read
905
     */
906
    void (*draw_horiz_band)(struct AVCodecContext *s,
907
                            const AVFrame *src, int offset[4],
908
                            int y, int type, int height);
909

    
910
    /* audio only */
911
    int sample_rate; ///< samples per second
912
    int channels;
913

    
914
    /**
915
     * audio sample format
916
     * - encoding: Set by user.
917
     * - decoding: Set by libavcodec.
918
     */
919
    enum SampleFormat sample_fmt;  ///< sample format, currently unused
920

    
921
    /* The following data should not be initialized. */
922
    /**
923
     * Samples per packet, initialized when calling 'init'.
924
     */
925
    int frame_size;
926
    int frame_number;   ///< audio or video frame number
927
    int real_pict_num;  ///< Returns the real picture number of previous encoded frame.
928

    
929
    /**
930
     * Number of frames the decoded output will be delayed relative to
931
     * the encoded input.
932
     * - encoding: Set by libavcodec.
933
     * - decoding: unused
934
     */
935
    int delay;
936

    
937
    /* - encoding parameters */
938
    float qcompress;  ///< amount of qscale change between easy & hard scenes (0.0-1.0)
939
    float qblur;      ///< amount of qscale smoothing over time (0.0-1.0)
940

    
941
    /**
942
     * minimum quantizer
943
     * - encoding: Set by user.
944
     * - decoding: unused
945
     */
946
    int qmin;
947

    
948
    /**
949
     * maximum quantizer
950
     * - encoding: Set by user.
951
     * - decoding: unused
952
     */
953
    int qmax;
954

    
955
    /**
956
     * maximum quantizer difference between frames
957
     * - encoding: Set by user.
958
     * - decoding: unused
959
     */
960
    int max_qdiff;
961

    
962
    /**
963
     * maximum number of B-frames between non-B-frames
964
     * Note: The output will be delayed by max_b_frames+1 relative to the input.
965
     * - encoding: Set by user.
966
     * - decoding: unused
967
     */
968
    int max_b_frames;
969

    
970
    /**
971
     * qscale factor between IP and B-frames
972
     * - encoding: Set by user.
973
     * - decoding: unused
974
     */
975
    float b_quant_factor;
976

    
977
    /** obsolete FIXME remove */
978
    int rc_strategy;
979
#define FF_RC_STRATEGY_XVID 1
980

    
981
    int b_frame_strategy;
982

    
983
    /**
984
     * hurry up amount
985
     * - encoding: unused
986
     * - decoding: Set by user. 1-> Skip B-frames, 2-> Skip IDCT/dequant too, 5-> Skip everything except header
987
     * @deprecated Deprecated in favor of skip_idct and skip_frame.
988
     */
989
    int hurry_up;
990

    
991
    struct AVCodec *codec;
992

    
993
    void *priv_data;
994

    
995
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
996
    /* unused, FIXME remove*/
997
    int rtp_mode;
998
#endif
999

    
1000
    int rtp_payload_size;   /* The size of the RTP payload: the coder will  */
1001
                            /* do its best to deliver a chunk with size     */
1002
                            /* below rtp_payload_size, the chunk will start */
1003
                            /* with a start code on some codecs like H.263. */
1004
                            /* This doesn't take account of any particular  */
1005
                            /* headers inside the transmitted RTP payload.  */
1006

    
1007

    
1008
    /* The RTP callback: This function is called    */
1009
    /* every time the encoder has a packet to send. */
1010
    /* It depends on the encoder if the data starts */
1011
    /* with a Start Code (it should). H.263 does.   */
1012
    /* mb_nb contains the number of macroblocks     */
1013
    /* encoded in the RTP payload.                  */
1014
    void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
1015

    
1016
    /* statistics, used for 2-pass encoding */
1017
    int mv_bits;
1018
    int header_bits;
1019
    int i_tex_bits;
1020
    int p_tex_bits;
1021
    int i_count;
1022
    int p_count;
1023
    int skip_count;
1024
    int misc_bits;
1025

    
1026
    /**
1027
     * number of bits used for the previously encoded frame
1028
     * - encoding: Set by libavcodec.
1029
     * - decoding: unused
1030
     */
1031
    int frame_bits;
1032

    
1033
    /**
1034
     * Private data of the user, can be used to carry app specific stuff.
1035
     * - encoding: Set by user.
1036
     * - decoding: Set by user.
1037
     */
1038
    void *opaque;
1039

    
1040
    char codec_name[32];
1041
    enum CodecType codec_type; /* see CODEC_TYPE_xxx */
1042
    enum CodecID codec_id; /* see CODEC_ID_xxx */
1043

    
1044
    /**
1045
     * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1046
     * This is used to work around some encoder bugs.
1047
     * A demuxer should set this to what is stored in the field used to identify the codec.
1048
     * If there are multiple such fields in a container then the demuxer should choose the one
1049
     * which maximizes the information about the used codec.
1050
     * If the codec tag field in a container is larger then 32 bits then the demuxer should
1051
     * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
1052
     * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
1053
     * first.
1054
     * - encoding: Set by user, if not then the default based on codec_id will be used.
1055
     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1056
     */
1057
    unsigned int codec_tag;
1058

    
1059
    /**
1060
     * Work around bugs in encoders which sometimes cannot be detected automatically.
1061
     * - encoding: Set by user
1062
     * - decoding: Set by user
1063
     */
1064
    int workaround_bugs;
1065
#define FF_BUG_AUTODETECT       1  ///< autodetection
1066
#define FF_BUG_OLD_MSMPEG4      2
1067
#define FF_BUG_XVID_ILACE       4
1068
#define FF_BUG_UMP4             8
1069
#define FF_BUG_NO_PADDING       16
1070
#define FF_BUG_AMV              32
1071
#define FF_BUG_AC_VLC           0  ///< Will be removed, libavcodec can now handle these non-compliant files by default.
1072
#define FF_BUG_QPEL_CHROMA      64
1073
#define FF_BUG_STD_QPEL         128
1074
#define FF_BUG_QPEL_CHROMA2     256
1075
#define FF_BUG_DIRECT_BLOCKSIZE 512
1076
#define FF_BUG_EDGE             1024
1077
#define FF_BUG_HPEL_CHROMA      2048
1078
#define FF_BUG_DC_CLIP          4096
1079
#define FF_BUG_MS               8192 ///< Work around various bugs in Microsoft's broken decoders.
1080
//#define FF_BUG_FAKE_SCALABILITY 16 //Autodetection should work 100%.
1081

    
1082
    /**
1083
     * luma single coefficient elimination threshold
1084
     * - encoding: Set by user.
1085
     * - decoding: unused
1086
     */
1087
    int luma_elim_threshold;
1088

    
1089
    /**
1090
     * chroma single coeff elimination threshold
1091
     * - encoding: Set by user.
1092
     * - decoding: unused
1093
     */
1094
    int chroma_elim_threshold;
1095

    
1096
    /**
1097
     * strictly follow the standard (MPEG4, ...).
1098
     * - encoding: Set by user.
1099
     * - decoding: unused
1100
     */
1101
    int strict_std_compliance;
1102
#define FF_COMPLIANCE_VERY_STRICT   2 ///< Strictly conform to a older more strict version of the spec or reference software.
1103
#define FF_COMPLIANCE_STRICT        1 ///< Strictly conform to all the things in the spec no matter what consequences.
1104
#define FF_COMPLIANCE_NORMAL        0
1105
#define FF_COMPLIANCE_INOFFICIAL   -1 ///< Allow inofficial extensions.
1106
#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
1107

    
1108
    /**
1109
     * qscale offset between IP and B-frames
1110
     * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
1111
     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1112
     * - encoding: Set by user.
1113
     * - decoding: unused
1114
     */
1115
    float b_quant_offset;
1116

    
1117
    /**
1118
     * Error resilience; higher values will detect more errors but may
1119
     * misdetect some more or less valid parts as errors.
1120
     * - encoding: unused
1121
     * - decoding: Set by user.
1122
     */
1123
    int error_resilience;
1124
#define FF_ER_CAREFUL         1
1125
#define FF_ER_COMPLIANT       2
1126
#define FF_ER_AGGRESSIVE      3
1127
#define FF_ER_VERY_AGGRESSIVE 4
1128

    
1129
    /**
1130
     * Called at the beginning of each frame to get a buffer for it.
1131
     * If pic.reference is set then the frame will be read later by libavcodec.
1132
     * avcodec_align_dimensions() should be used to find the required width and
1133
     * height, as they normally need to be rounded up to the next multiple of 16.
1134
     * - encoding: unused
1135
     * - decoding: Set by libavcodec., user can override.
1136
     */
1137
    int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1138

    
1139
    /**
1140
     * Called to release buffers which where allocated with get_buffer.
1141
     * A released buffer can be reused in get_buffer().
1142
     * pic.data[*] must be set to NULL.
1143
     * - encoding: unused
1144
     * - decoding: Set by libavcodec., user can override.
1145
     */
1146
    void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1147

    
1148
    /**
1149
     * If 1 the stream has a 1 frame delay during decoding.
1150
     * - encoding: Set by libavcodec.
1151
     * - decoding: Set by libavcodec.
1152
     */
1153
    int has_b_frames;
1154

    
1155
    /**
1156
     * number of bytes per packet if constant and known or 0
1157
     * Used by some WAV based audio codecs.
1158
     */
1159
    int block_align;
1160

    
1161
    int parse_only; /* - decoding only: If true, only parsing is done
1162
                       (function avcodec_parse_frame()). The frame
1163
                       data is returned. Only MPEG codecs support this now. */
1164

    
1165
    /**
1166
     * 0-> h263 quant 1-> mpeg quant
1167
     * - encoding: Set by user.
1168
     * - decoding: unused
1169
     */
1170
    int mpeg_quant;
1171

    
1172
    /**
1173
     * pass1 encoding statistics output buffer
1174
     * - encoding: Set by libavcodec.
1175
     * - decoding: unused
1176
     */
1177
    char *stats_out;
1178

    
1179
    /**
1180
     * pass2 encoding statistics input buffer
1181
     * Concatenated stuff from stats_out of pass1 should be placed here.
1182
     * - encoding: Allocated/set/freed by user.
1183
     * - decoding: unused
1184
     */
1185
    char *stats_in;
1186

    
1187
    /**
1188
     * ratecontrol qmin qmax limiting method
1189
     * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
1190
     * - encoding: Set by user.
1191
     * - decoding: unused
1192
     */
1193
    float rc_qsquish;
1194

    
1195
    float rc_qmod_amp;
1196
    int rc_qmod_freq;
1197

    
1198
    /**
1199
     * ratecontrol override, see RcOverride
1200
     * - encoding: Allocated/set/freed by user.
1201
     * - decoding: unused
1202
     */
1203
    RcOverride *rc_override;
1204
    int rc_override_count;
1205

    
1206
    /**
1207
     * rate control equation
1208
     * - encoding: Set by user
1209
     * - decoding: unused
1210
     */
1211
    const char *rc_eq;
1212

    
1213
    /**
1214
     * maximum bitrate
1215
     * - encoding: Set by user.
1216
     * - decoding: unused
1217
     */
1218
    int rc_max_rate;
1219

    
1220
    /**
1221
     * minimum bitrate
1222
     * - encoding: Set by user.
1223
     * - decoding: unused
1224
     */
1225
    int rc_min_rate;
1226

    
1227
    /**
1228
     * decoder bitstream buffer size
1229
     * - encoding: Set by user.
1230
     * - decoding: unused
1231
     */
1232
    int rc_buffer_size;
1233
    float rc_buffer_aggressivity;
1234

    
1235
    /**
1236
     * qscale factor between P and I-frames
1237
     * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
1238
     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1239
     * - encoding: Set by user.
1240
     * - decoding: unused
1241
     */
1242
    float i_quant_factor;
1243

    
1244
    /**
1245
     * qscale offset between P and I-frames
1246
     * - encoding: Set by user.
1247
     * - decoding: unused
1248
     */
1249
    float i_quant_offset;
1250

    
1251
    /**
1252
     * initial complexity for pass1 ratecontrol
1253
     * - encoding: Set by user.
1254
     * - decoding: unused
1255
     */
1256
    float rc_initial_cplx;
1257

    
1258
    /**
1259
     * DCT algorithm, see FF_DCT_* below
1260
     * - encoding: Set by user.
1261
     * - decoding: unused
1262
     */
1263
    int dct_algo;
1264
#define FF_DCT_AUTO    0
1265
#define FF_DCT_FASTINT 1
1266
#define FF_DCT_INT     2
1267
#define FF_DCT_MMX     3
1268
#define FF_DCT_MLIB    4
1269
#define FF_DCT_ALTIVEC 5
1270
#define FF_DCT_FAAN    6
1271

    
1272
    /**
1273
     * luminance masking (0-> disabled)
1274
     * - encoding: Set by user.
1275
     * - decoding: unused
1276
     */
1277
    float lumi_masking;
1278

    
1279
    /**
1280
     * temporary complexity masking (0-> disabled)
1281
     * - encoding: Set by user.
1282
     * - decoding: unused
1283
     */
1284
    float temporal_cplx_masking;
1285

    
1286
    /**
1287
     * spatial complexity masking (0-> disabled)
1288
     * - encoding: Set by user.
1289
     * - decoding: unused
1290
     */
1291
    float spatial_cplx_masking;
1292

    
1293
    /**
1294
     * p block masking (0-> disabled)
1295
     * - encoding: Set by user.
1296
     * - decoding: unused
1297
     */
1298
    float p_masking;
1299

    
1300
    /**
1301
     * darkness masking (0-> disabled)
1302
     * - encoding: Set by user.
1303
     * - decoding: unused
1304
     */
1305
    float dark_masking;
1306

    
1307

    
1308
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
1309
    /* for binary compatibility */
1310
    int unused;
1311
#endif
1312

    
1313
    /**
1314
     * IDCT algorithm, see FF_IDCT_* below.
1315
     * - encoding: Set by user.
1316
     * - decoding: Set by user.
1317
     */
1318
    int idct_algo;
1319
#define FF_IDCT_AUTO          0
1320
#define FF_IDCT_INT           1
1321
#define FF_IDCT_SIMPLE        2
1322
#define FF_IDCT_SIMPLEMMX     3
1323
#define FF_IDCT_LIBMPEG2MMX   4
1324
#define FF_IDCT_PS2           5
1325
#define FF_IDCT_MLIB          6
1326
#define FF_IDCT_ARM           7
1327
#define FF_IDCT_ALTIVEC       8
1328
#define FF_IDCT_SH4           9
1329
#define FF_IDCT_SIMPLEARM     10
1330
#define FF_IDCT_H264          11
1331
#define FF_IDCT_VP3           12
1332
#define FF_IDCT_IPP           13
1333
#define FF_IDCT_XVIDMMX       14
1334
#define FF_IDCT_CAVS          15
1335
#define FF_IDCT_SIMPLEARMV5TE 16
1336
#define FF_IDCT_SIMPLEARMV6   17
1337
#define FF_IDCT_SIMPLEVIS     18
1338
#define FF_IDCT_WMV2          19
1339
#define FF_IDCT_FAAN          20
1340

    
1341
    /**
1342
     * slice count
1343
     * - encoding: Set by libavcodec.
1344
     * - decoding: Set by user (or 0).
1345
     */
1346
    int slice_count;
1347
    /**
1348
     * slice offsets in the frame in bytes
1349
     * - encoding: Set/allocated by libavcodec.
1350
     * - decoding: Set/allocated by user (or NULL).
1351
     */
1352
    int *slice_offset;
1353

    
1354
    /**
1355
     * error concealment flags
1356
     * - encoding: unused
1357
     * - decoding: Set by user.
1358
     */
1359
    int error_concealment;
1360
#define FF_EC_GUESS_MVS   1
1361
#define FF_EC_DEBLOCK     2
1362

    
1363
    /**
1364
     * dsp_mask could be add used to disable unwanted CPU features
1365
     * CPU features (i.e. MMX, SSE. ...)
1366
     *
1367
     * With the FORCE flag you may instead enable given CPU features.
1368
     * (Dangerous: Usable in case of misdetection, improper usage however will
1369
     * result into program crash.)
1370
     */
1371
    unsigned dsp_mask;
1372
#define FF_MM_FORCE    0x80000000 /* Force usage of selected flags (OR) */
1373
    /* lower 16 bits - CPU features */
1374
#define FF_MM_MMX      0x0001 ///< standard MMX
1375
#define FF_MM_3DNOW    0x0004 ///< AMD 3DNOW
1376
#define FF_MM_MMXEXT   0x0002 ///< SSE integer functions or AMD MMX ext
1377
#define FF_MM_SSE      0x0008 ///< SSE functions
1378
#define FF_MM_SSE2     0x0010 ///< PIV SSE2 functions
1379
#define FF_MM_3DNOWEXT 0x0020 ///< AMD 3DNowExt
1380
#define FF_MM_SSE3     0x0040 ///< Prescott SSE3 functions
1381
#define FF_MM_SSSE3    0x0080 ///< Conroe SSSE3 functions
1382
#define FF_MM_IWMMXT   0x0100 ///< XScale IWMMXT
1383

    
1384
    /**
1385
     * bits per sample/pixel from the demuxer (needed for huffyuv).
1386
     * - encoding: Set by libavcodec.
1387
     * - decoding: Set by user.
1388
     */
1389
     int bits_per_sample;
1390

    
1391
    /**
1392
     * prediction method (needed for huffyuv)
1393
     * - encoding: Set by user.
1394
     * - decoding: unused
1395
     */
1396
     int prediction_method;
1397
#define FF_PRED_LEFT   0
1398
#define FF_PRED_PLANE  1
1399
#define FF_PRED_MEDIAN 2
1400

    
1401
    /**
1402
     * sample aspect ratio (0 if unknown)
1403
     * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
1404
     * - encoding: Set by user.
1405
     * - decoding: Set by libavcodec.
1406
     */
1407
    AVRational sample_aspect_ratio;
1408

    
1409
    /**
1410
     * the picture in the bitstream
1411
     * - encoding: Set by libavcodec.
1412
     * - decoding: Set by libavcodec.
1413
     */
1414
    AVFrame *coded_frame;
1415

    
1416
    /**
1417
     * debug
1418
     * - encoding: Set by user.
1419
     * - decoding: Set by user.
1420
     */
1421
    int debug;
1422
#define FF_DEBUG_PICT_INFO   1
1423
#define FF_DEBUG_RC          2
1424
#define FF_DEBUG_BITSTREAM   4
1425
#define FF_DEBUG_MB_TYPE     8
1426
#define FF_DEBUG_QP          16
1427
#define FF_DEBUG_MV          32
1428
#define FF_DEBUG_DCT_COEFF   0x00000040
1429
#define FF_DEBUG_SKIP        0x00000080
1430
#define FF_DEBUG_STARTCODE   0x00000100
1431
#define FF_DEBUG_PTS         0x00000200
1432
#define FF_DEBUG_ER          0x00000400
1433
#define FF_DEBUG_MMCO        0x00000800
1434
#define FF_DEBUG_BUGS        0x00001000
1435
#define FF_DEBUG_VIS_QP      0x00002000
1436
#define FF_DEBUG_VIS_MB_TYPE 0x00004000
1437

    
1438
    /**
1439
     * debug
1440
     * - encoding: Set by user.
1441
     * - decoding: Set by user.
1442
     */
1443
    int debug_mv;
1444
#define FF_DEBUG_VIS_MV_P_FOR  0x00000001 //visualize forward predicted MVs of P frames
1445
#define FF_DEBUG_VIS_MV_B_FOR  0x00000002 //visualize forward predicted MVs of B frames
1446
#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1447

    
1448
    /**
1449
     * error
1450
     * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
1451
     * - decoding: unused
1452
     */
1453
    uint64_t error[4];
1454

    
1455
    /**
1456
     * minimum MB quantizer
1457
     * - encoding: unused
1458
     * - decoding: unused
1459
     */
1460
    int mb_qmin;
1461

    
1462
    /**
1463
     * maximum MB quantizer
1464
     * - encoding: unused
1465
     * - decoding: unused
1466
     */
1467
    int mb_qmax;
1468

    
1469
    /**
1470
     * motion estimation comparison function
1471
     * - encoding: Set by user.
1472
     * - decoding: unused
1473
     */
1474
    int me_cmp;
1475
    /**
1476
     * subpixel motion estimation comparison function
1477
     * - encoding: Set by user.
1478
     * - decoding: unused
1479
     */
1480
    int me_sub_cmp;
1481
    /**
1482
     * macroblock comparison function (not supported yet)
1483
     * - encoding: Set by user.
1484
     * - decoding: unused
1485
     */
1486
    int mb_cmp;
1487
    /**
1488
     * interlaced DCT comparison function
1489
     * - encoding: Set by user.
1490
     * - decoding: unused
1491
     */
1492
    int ildct_cmp;
1493
#define FF_CMP_SAD    0
1494
#define FF_CMP_SSE    1
1495
#define FF_CMP_SATD   2
1496
#define FF_CMP_DCT    3
1497
#define FF_CMP_PSNR   4
1498
#define FF_CMP_BIT    5
1499
#define FF_CMP_RD     6
1500
#define FF_CMP_ZERO   7
1501
#define FF_CMP_VSAD   8
1502
#define FF_CMP_VSSE   9
1503
#define FF_CMP_NSSE   10
1504
#define FF_CMP_W53    11
1505
#define FF_CMP_W97    12
1506
#define FF_CMP_DCTMAX 13
1507
#define FF_CMP_DCT264 14
1508
#define FF_CMP_CHROMA 256
1509

    
1510
    /**
1511
     * ME diamond size & shape
1512
     * - encoding: Set by user.
1513
     * - decoding: unused
1514
     */
1515
    int dia_size;
1516

    
1517
    /**
1518
     * amount of previous MV predictors (2a+1 x 2a+1 square)
1519
     * - encoding: Set by user.
1520
     * - decoding: unused
1521
     */
1522
    int last_predictor_count;
1523

    
1524
    /**
1525
     * prepass for motion estimation
1526
     * - encoding: Set by user.
1527
     * - decoding: unused
1528
     */
1529
    int pre_me;
1530

    
1531
    /**
1532
     * motion estimation prepass comparison function
1533
     * - encoding: Set by user.
1534
     * - decoding: unused
1535
     */
1536
    int me_pre_cmp;
1537

    
1538
    /**
1539
     * ME prepass diamond size & shape
1540
     * - encoding: Set by user.
1541
     * - decoding: unused
1542
     */
1543
    int pre_dia_size;
1544

    
1545
    /**
1546
     * subpel ME quality
1547
     * - encoding: Set by user.
1548
     * - decoding: unused
1549
     */
1550
    int me_subpel_quality;
1551

    
1552
    /**
1553
     * callback to negotiate the pixelFormat
1554
     * @param fmt is the list of formats which are supported by the codec,
1555
     * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
1556
     * The first is always the native one.
1557
     * @return the chosen format
1558
     * - encoding: unused
1559
     * - decoding: Set by user, if not set the native format will be chosen.
1560
     */
1561
    enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1562

    
1563
    /**
1564
     * DTG active format information (additional aspect ratio
1565
     * information only used in DVB MPEG-2 transport streams)
1566
     * 0 if not set.
1567
     *
1568
     * - encoding: unused
1569
     * - decoding: Set by decoder.
1570
     */
1571
    int dtg_active_format;
1572
#define FF_DTG_AFD_SAME         8
1573
#define FF_DTG_AFD_4_3          9
1574
#define FF_DTG_AFD_16_9         10
1575
#define FF_DTG_AFD_14_9         11
1576
#define FF_DTG_AFD_4_3_SP_14_9  13
1577
#define FF_DTG_AFD_16_9_SP_14_9 14
1578
#define FF_DTG_AFD_SP_4_3       15
1579

    
1580
    /**
1581
     * maximum motion estimation search range in subpel units
1582
     * If 0 then no limit.
1583
     *
1584
     * - encoding: Set by user.
1585
     * - decoding: unused
1586
     */
1587
    int me_range;
1588

    
1589
    /**
1590
     * intra quantizer bias
1591
     * - encoding: Set by user.
1592
     * - decoding: unused
1593
     */
1594
    int intra_quant_bias;
1595
#define FF_DEFAULT_QUANT_BIAS 999999
1596

    
1597
    /**
1598
     * inter quantizer bias
1599
     * - encoding: Set by user.
1600
     * - decoding: unused
1601
     */
1602
    int inter_quant_bias;
1603

    
1604
    /**
1605
     * color table ID
1606
     * - encoding: unused
1607
     * - decoding: Which clrtable should be used for 8bit RGB images.
1608
     *             Tables have to be stored somewhere. FIXME
1609
     */
1610
    int color_table_id;
1611

    
1612
    /**
1613
     * internal_buffer count
1614
     * Don't touch, used by libavcodec default_get_buffer().
1615
     */
1616
    int internal_buffer_count;
1617

    
1618
    /**
1619
     * internal_buffers
1620
     * Don't touch, used by libavcodec default_get_buffer().
1621
     */
1622
    void *internal_buffer;
1623

    
1624
#define FF_LAMBDA_SHIFT 7
1625
#define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1626
#define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1627
#define FF_LAMBDA_MAX (256*128-1)
1628

    
1629
#define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1630
    /**
1631
     * Global quality for codecs which cannot change it per frame.
1632
     * This should be proportional to MPEG-1/2/4 qscale.
1633
     * - encoding: Set by user.
1634
     * - decoding: unused
1635
     */
1636
    int global_quality;
1637

    
1638
#define FF_CODER_TYPE_VLC       0
1639
#define FF_CODER_TYPE_AC        1
1640
#define FF_CODER_TYPE_RAW       2
1641
#define FF_CODER_TYPE_RLE       3
1642
#define FF_CODER_TYPE_DEFLATE   4
1643
    /**
1644
     * coder type
1645
     * - encoding: Set by user.
1646
     * - decoding: unused
1647
     */
1648
    int coder_type;
1649

    
1650
    /**
1651
     * context model
1652
     * - encoding: Set by user.
1653
     * - decoding: unused
1654
     */
1655
    int context_model;
1656
#if 0
1657
    /**
1658
     *
1659
     * - encoding: unused
1660
     * - decoding: Set by user.
1661
     */
1662
    uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1663
#endif
1664

    
1665
    /**
1666
     * slice flags
1667
     * - encoding: unused
1668
     * - decoding: Set by user.
1669
     */
1670
    int slice_flags;
1671
#define SLICE_FLAG_CODED_ORDER    0x0001 ///< draw_horiz_band() is called in coded order instead of display
1672
#define SLICE_FLAG_ALLOW_FIELD    0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1673
#define SLICE_FLAG_ALLOW_PLANE    0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1674

    
1675
    /**
1676
     * XVideo Motion Acceleration
1677
     * - encoding: forbidden
1678
     * - decoding: set by decoder
1679
     */
1680
    int xvmc_acceleration;
1681

    
1682
    /**
1683
     * macroblock decision mode
1684
     * - encoding: Set by user.
1685
     * - decoding: unused
1686
     */
1687
    int mb_decision;
1688
#define FF_MB_DECISION_SIMPLE 0        ///< uses mb_cmp
1689
#define FF_MB_DECISION_BITS   1        ///< chooses the one which needs the fewest bits
1690
#define FF_MB_DECISION_RD     2        ///< rate distoration
1691

    
1692
    /**
1693
     * custom intra quantization matrix
1694
     * - encoding: Set by user, can be NULL.
1695
     * - decoding: Set by libavcodec.
1696
     */
1697
    uint16_t *intra_matrix;
1698

    
1699
    /**
1700
     * custom inter quantization matrix
1701
     * - encoding: Set by user, can be NULL.
1702
     * - decoding: Set by libavcodec.
1703
     */
1704
    uint16_t *inter_matrix;
1705

    
1706
    /**
1707
     * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1708
     * This is used to work around some encoder bugs.
1709
     * - encoding: unused
1710
     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1711
     */
1712
    unsigned int stream_codec_tag;
1713

    
1714
    /**
1715
     * scene change detection threshold
1716
     * 0 is default, larger means fewer detected scene changes.
1717
     * - encoding: Set by user.
1718
     * - decoding: unused
1719
     */
1720
    int scenechange_threshold;
1721

    
1722
    /**
1723
     * minimum Lagrange multipler
1724
     * - encoding: Set by user.
1725
     * - decoding: unused
1726
     */
1727
    int lmin;
1728

    
1729
    /**
1730
     * maximum Lagrange multipler
1731
     * - encoding: Set by user.
1732
     * - decoding: unused
1733
     */
1734
    int lmax;
1735

    
1736
    /**
1737
     * palette control structure
1738
     * - encoding: ??? (no palette-enabled encoder yet)
1739
     * - decoding: Set by user.
1740
     */
1741
    struct AVPaletteControl *palctrl;
1742

    
1743
    /**
1744
     * noise reduction strength
1745
     * - encoding: Set by user.
1746
     * - decoding: unused
1747
     */
1748
    int noise_reduction;
1749

    
1750
    /**
1751
     * Called at the beginning of a frame to get cr buffer for it.
1752
     * Buffer type (size, hints) must be the same. libavcodec won't check it.
1753
     * libavcodec will pass previous buffer in pic, function should return
1754
     * same buffer or new buffer with old frame "painted" into it.
1755
     * If pic.data[0] == NULL must behave like get_buffer().
1756
     * - encoding: unused
1757
     * - decoding: Set by libavcodec., user can override
1758
     */
1759
    int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1760

    
1761
    /**
1762
     * Number of bits which should be loaded into the rc buffer before decoding starts.
1763
     * - encoding: Set by user.
1764
     * - decoding: unused
1765
     */
1766
    int rc_initial_buffer_occupancy;
1767

    
1768
    /**
1769
     *
1770
     * - encoding: Set by user.
1771
     * - decoding: unused
1772
     */
1773
    int inter_threshold;
1774

    
1775
    /**
1776
     * CODEC_FLAG2_*
1777
     * - encoding: Set by user.
1778
     * - decoding: Set by user.
1779
     */
1780
    int flags2;
1781

    
1782
    /**
1783
     * Simulates errors in the bitstream to test error concealment.
1784
     * - encoding: Set by user.
1785
     * - decoding: unused
1786
     */
1787
    int error_rate;
1788

    
1789
    /**
1790
     * MP3 antialias algorithm, see FF_AA_* below.
1791
     * - encoding: unused
1792
     * - decoding: Set by user.
1793
     */
1794
    int antialias_algo;
1795
#define FF_AA_AUTO    0
1796
#define FF_AA_FASTINT 1 //not implemented yet
1797
#define FF_AA_INT     2
1798
#define FF_AA_FLOAT   3
1799
    /**
1800
     * quantizer noise shaping
1801
     * - encoding: Set by user.
1802
     * - decoding: unused
1803
     */
1804
    int quantizer_noise_shaping;
1805

    
1806
    /**
1807
     * thread count
1808
     * is used to decide how many independent tasks should be passed to execute()
1809
     * - encoding: Set by user.
1810
     * - decoding: Set by user.
1811
     */
1812
    int thread_count;
1813

    
1814
    /**
1815
     * The codec may call this to execute several independent things.
1816
     * It will return only after finishing all tasks.
1817
     * The user may replace this with some multithreaded implementation,
1818
     * the default implementation will execute the parts serially.
1819
     * @param count the number of things to execute
1820
     * - encoding: Set by libavcodec, user can override.
1821
     * - decoding: Set by libavcodec, user can override.
1822
     */
1823
    int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1824

    
1825
    /**
1826
     * thread opaque
1827
     * Can be used by execute() to store some per AVCodecContext stuff.
1828
     * - encoding: set by execute()
1829
     * - decoding: set by execute()
1830
     */
1831
    void *thread_opaque;
1832

    
1833
    /**
1834
     * Motion estimation threshold below which no motion estimation is
1835
     * performed, but instead the user specified motion vectors are used.
1836
     *
1837
     * - encoding: Set by user.
1838
     * - decoding: unused
1839
     */
1840
     int me_threshold;
1841

    
1842
    /**
1843
     * Macroblock threshold below which the user specified macroblock types will be used.
1844
     * - encoding: Set by user.
1845
     * - decoding: unused
1846
     */
1847
     int mb_threshold;
1848

    
1849
    /**
1850
     * precision of the intra DC coefficient - 8
1851
     * - encoding: Set by user.
1852
     * - decoding: unused
1853
     */
1854
     int intra_dc_precision;
1855

    
1856
    /**
1857
     * noise vs. sse weight for the nsse comparsion function
1858
     * - encoding: Set by user.
1859
     * - decoding: unused
1860
     */
1861
     int nsse_weight;
1862

    
1863
    /**
1864
     * Number of macroblock rows at the top which are skipped.
1865
     * - encoding: unused
1866
     * - decoding: Set by user.
1867
     */
1868
     int skip_top;
1869

    
1870
    /**
1871
     * Number of macroblock rows at the bottom which are skipped.
1872
     * - encoding: unused
1873
     * - decoding: Set by user.
1874
     */
1875
     int skip_bottom;
1876

    
1877
    /**
1878
     * profile
1879
     * - encoding: Set by user.
1880
     * - decoding: Set by libavcodec.
1881
     */
1882
     int profile;
1883
#define FF_PROFILE_UNKNOWN -99
1884
#define FF_PROFILE_AAC_MAIN 0
1885
#define FF_PROFILE_AAC_LOW  1
1886
#define FF_PROFILE_AAC_SSR  2
1887
#define FF_PROFILE_AAC_LTP  3
1888

    
1889
    /**
1890
     * level
1891
     * - encoding: Set by user.
1892
     * - decoding: Set by libavcodec.
1893
     */
1894
     int level;
1895
#define FF_LEVEL_UNKNOWN -99
1896

    
1897
    /**
1898
     * low resolution decoding, 1-> 1/2 size, 2->1/4 size
1899
     * - encoding: unused
1900
     * - decoding: Set by user.
1901
     */
1902
     int lowres;
1903

    
1904
    /**
1905
     * Bitstream width / height, may be different from width/height if lowres
1906
     * or other things are used.
1907
     * - encoding: unused
1908
     * - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
1909
     */
1910
    int coded_width, coded_height;
1911

    
1912
    /**
1913
     * frame skip threshold
1914
     * - encoding: Set by user.
1915
     * - decoding: unused
1916
     */
1917
    int frame_skip_threshold;
1918

    
1919
    /**
1920
     * frame skip factor
1921
     * - encoding: Set by user.
1922
     * - decoding: unused
1923
     */
1924
    int frame_skip_factor;
1925

    
1926
    /**
1927
     * frame skip exponent
1928
     * - encoding: Set by user.
1929
     * - decoding: unused
1930
     */
1931
    int frame_skip_exp;
1932

    
1933
    /**
1934
     * frame skip comparison function
1935
     * - encoding: Set by user.
1936
     * - decoding: unused
1937
     */
1938
    int frame_skip_cmp;
1939

    
1940
    /**
1941
     * Border processing masking, raises the quantizer for mbs on the borders
1942
     * of the picture.
1943
     * - encoding: Set by user.
1944
     * - decoding: unused
1945
     */
1946
    float border_masking;
1947

    
1948
    /**
1949
     * minimum MB lagrange multipler
1950
     * - encoding: Set by user.
1951
     * - decoding: unused
1952
     */
1953
    int mb_lmin;
1954

    
1955
    /**
1956
     * maximum MB lagrange multipler
1957
     * - encoding: Set by user.
1958
     * - decoding: unused
1959
     */
1960
    int mb_lmax;
1961

    
1962
    /**
1963
     *
1964
     * - encoding: Set by user.
1965
     * - decoding: unused
1966
     */
1967
    int me_penalty_compensation;
1968

    
1969
    /**
1970
     *
1971
     * - encoding: unused
1972
     * - decoding: Set by user.
1973
     */
1974
    enum AVDiscard skip_loop_filter;
1975

    
1976
    /**
1977
     *
1978
     * - encoding: unused
1979
     * - decoding: Set by user.
1980
     */
1981
    enum AVDiscard skip_idct;
1982

    
1983
    /**
1984
     *
1985
     * - encoding: unused
1986
     * - decoding: Set by user.
1987
     */
1988
    enum AVDiscard skip_frame;
1989

    
1990
    /**
1991
     *
1992
     * - encoding: Set by user.
1993
     * - decoding: unused
1994
     */
1995
    int bidir_refine;
1996

    
1997
    /**
1998
     *
1999
     * - encoding: Set by user.
2000
     * - decoding: unused
2001
     */
2002
    int brd_scale;
2003

    
2004
    /**
2005
     * constant rate factor - quality-based VBR - values ~correspond to qps
2006
     * - encoding: Set by user.
2007
     * - decoding: unused
2008
     */
2009
    float crf;
2010

    
2011
    /**
2012
     * constant quantization parameter rate control method
2013
     * - encoding: Set by user.
2014
     * - decoding: unused
2015
     */
2016
    int cqp;
2017

    
2018
    /**
2019
     * minimum GOP size
2020
     * - encoding: Set by user.
2021
     * - decoding: unused
2022
     */
2023
    int keyint_min;
2024

    
2025
    /**
2026
     * number of reference frames
2027
     * - encoding: Set by user.
2028
     * - decoding: unused
2029
     */
2030
    int refs;
2031

    
2032
    /**
2033
     * chroma qp offset from luma
2034
     * - encoding: Set by user.
2035
     * - decoding: unused
2036
     */
2037
    int chromaoffset;
2038

    
2039
    /**
2040
     * Influences how often B-frames are used.
2041
     * - encoding: Set by user.
2042
     * - decoding: unused
2043
     */
2044
    int bframebias;
2045

    
2046
    /**
2047
     * trellis RD quantization
2048
     * - encoding: Set by user.
2049
     * - decoding: unused
2050
     */
2051
    int trellis;
2052

    
2053
    /**
2054
     * Reduce fluctuations in qp (before curve compression).
2055
     * - encoding: Set by user.
2056
     * - decoding: unused
2057
     */
2058
    float complexityblur;
2059

    
2060
    /**
2061
     * in-loop deblocking filter alphac0 parameter
2062
     * alpha is in the range -6...6
2063
     * - encoding: Set by user.
2064
     * - decoding: unused
2065
     */
2066
    int deblockalpha;
2067

    
2068
    /**
2069
     * in-loop deblocking filter beta parameter
2070
     * beta is in the range -6...6
2071
     * - encoding: Set by user.
2072
     * - decoding: unused
2073
     */
2074
    int deblockbeta;
2075

    
2076
    /**
2077
     * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
2078
     * - encoding: Set by user.
2079
     * - decoding: unused
2080
     */
2081
    int partitions;
2082
#define X264_PART_I4X4 0x001  /* Analyze i4x4 */
2083
#define X264_PART_I8X8 0x002  /* Analyze i8x8 (requires 8x8 transform) */
2084
#define X264_PART_P8X8 0x010  /* Analyze p16x8, p8x16 and p8x8 */
2085
#define X264_PART_P4X4 0x020  /* Analyze p8x4, p4x8, p4x4 */
2086
#define X264_PART_B8X8 0x100  /* Analyze b16x8, b8x16 and b8x8 */
2087

    
2088
    /**
2089
     * direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal)
2090
     * - encoding: Set by user.
2091
     * - decoding: unused
2092
     */
2093
    int directpred;
2094

    
2095
    /**
2096
     * Audio cutoff bandwidth (0 means "automatic")
2097
     * - encoding: Set by user.
2098
     * - decoding: unused
2099
     */
2100
    int cutoff;
2101

    
2102
    /**
2103
     * Multiplied by qscale for each frame and added to scene_change_score.
2104
     * - encoding: Set by user.
2105
     * - decoding: unused
2106
     */
2107
    int scenechange_factor;
2108

    
2109
    /**
2110
     *
2111
     * Note: Value depends upon the compare function used for fullpel ME.
2112
     * - encoding: Set by user.
2113
     * - decoding: unused
2114
     */
2115
    int mv0_threshold;
2116

    
2117
    /**
2118
     * Adjusts sensitivity of b_frame_strategy 1.
2119
     * - encoding: Set by user.
2120
     * - decoding: unused
2121
     */
2122
    int b_sensitivity;
2123

    
2124
    /**
2125
     * - encoding: Set by user.
2126
     * - decoding: unused
2127
     */
2128
    int compression_level;
2129
#define FF_COMPRESSION_DEFAULT -1
2130

    
2131
    /**
2132
     * Sets whether to use LPC mode - used by FLAC encoder.
2133
     * - encoding: Set by user.
2134
     * - decoding: unused
2135
     */
2136
    int use_lpc;
2137

    
2138
    /**
2139
     * LPC coefficient precision - used by FLAC encoder
2140
     * - encoding: Set by user.
2141
     * - decoding: unused
2142
     */
2143
    int lpc_coeff_precision;
2144

    
2145
    /**
2146
     * - encoding: Set by user.
2147
     * - decoding: unused
2148
     */
2149
    int min_prediction_order;
2150

    
2151
    /**
2152
     * - encoding: Set by user.
2153
     * - decoding: unused
2154
     */
2155
    int max_prediction_order;
2156

    
2157
    /**
2158
     * search method for selecting prediction order
2159
     * - encoding: Set by user.
2160
     * - decoding: unused
2161
     */
2162
    int prediction_order_method;
2163

    
2164
    /**
2165
     * - encoding: Set by user.
2166
     * - decoding: unused
2167
     */
2168
    int min_partition_order;
2169

    
2170
    /**
2171
     * - encoding: Set by user.
2172
     * - decoding: unused
2173
     */
2174
    int max_partition_order;
2175

    
2176
    /**
2177
     * GOP timecode frame start number, in non drop frame format
2178
     * - encoding: Set by user.
2179
     * - decoding: unused
2180
     */
2181
    int64_t timecode_frame_start;
2182

    
2183
    /**
2184
     * Decoder should decode to this many channels if it can (0 for default)
2185
     * - encoding: unused
2186
     * - decoding: Set by user.
2187
     */
2188
    int request_channels;
2189

    
2190
    /**
2191
     * Percentage of dynamic range compression to be applied by the decoder.
2192
     * The default value is 1.0, corresponding to full compression.
2193
     * - encoding: unused
2194
     * - decoding: Set by user.
2195
     */
2196
    float drc_scale;
2197
} AVCodecContext;
2198

    
2199
/**
2200
 * AVCodec.
2201
 */
2202
typedef struct AVCodec {
2203
    /**
2204
     * Name of the codec implementation.
2205
     * The name is globally unique among encoders and among decoders (but an
2206
     * encoder and a decoder can share the same name).
2207
     * This is the primary way to find a codec from the user perspective.
2208
     */
2209
    const char *name;
2210
    enum CodecType type;
2211
    enum CodecID id;
2212
    int priv_data_size;
2213
    int (*init)(AVCodecContext *);
2214
    int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2215
    int (*close)(AVCodecContext *);
2216
    int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
2217
                  const uint8_t *buf, int buf_size);
2218
    int capabilities;
2219
    struct AVCodec *next;
2220
    void (*flush)(AVCodecContext *);
2221
    const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
2222
    const enum PixelFormat *pix_fmts;       ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
2223
} AVCodec;
2224

    
2225
/**
2226
 * four components are given, that's all.
2227
 * the last component is alpha
2228
 */
2229
typedef struct AVPicture {
2230
    uint8_t *data[4];
2231
    int linesize[4];       ///< number of bytes per line
2232
} AVPicture;
2233

    
2234
/**
2235
 * AVPaletteControl
2236
 * This structure defines a method for communicating palette changes
2237
 * between and demuxer and a decoder.
2238
 *
2239
 * @deprecated Use AVPacket to send palette changes instead.
2240
 * This is totally broken.
2241
 */
2242
#define AVPALETTE_SIZE 1024
2243
#define AVPALETTE_COUNT 256
2244
typedef struct AVPaletteControl {
2245

    
2246
    /* Demuxer sets this to 1 to indicate the palette has changed;
2247
     * decoder resets to 0. */
2248
    int palette_changed;
2249

    
2250
    /* 4-byte ARGB palette entries, stored in native byte order; note that
2251
     * the individual palette components should be on a 8-bit scale; if
2252
     * the palette data comes from an IBM VGA native format, the component
2253
     * data is probably 6 bits in size and needs to be scaled. */
2254
    unsigned int palette[AVPALETTE_COUNT];
2255

    
2256
} AVPaletteControl attribute_deprecated;
2257

    
2258
typedef struct AVSubtitleRect {
2259
    uint16_t x;
2260
    uint16_t y;
2261
    uint16_t w;
2262
    uint16_t h;
2263
    uint16_t nb_colors;
2264
    int linesize;
2265
    uint32_t *rgba_palette;
2266
    uint8_t *bitmap;
2267
} AVSubtitleRect;
2268

    
2269
typedef struct AVSubtitle {
2270
    uint16_t format; /* 0 = graphics */
2271
    uint32_t start_display_time; /* relative to packet pts, in ms */
2272
    uint32_t end_display_time; /* relative to packet pts, in ms */
2273
    uint32_t num_rects;
2274
    AVSubtitleRect *rects;
2275
} AVSubtitle;
2276

    
2277

    
2278
/* resample.c */
2279

    
2280
struct ReSampleContext;
2281
struct AVResampleContext;
2282

    
2283
typedef struct ReSampleContext ReSampleContext;
2284

    
2285
ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2286
                                     int output_rate, int input_rate);
2287
int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2288
void audio_resample_close(ReSampleContext *s);
2289

    
2290
struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2291
int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2292
void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2293
void av_resample_close(struct AVResampleContext *c);
2294

    
2295
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2296
/* YUV420 format is assumed ! */
2297

    
2298
/**
2299
 * @deprecated Use the software scaler (swscale) instead.
2300
 */
2301
typedef struct ImgReSampleContext ImgReSampleContext attribute_deprecated;
2302

    
2303
/**
2304
 * @deprecated Use the software scaler (swscale) instead.
2305
 */
2306
attribute_deprecated ImgReSampleContext *img_resample_init(int output_width, int output_height,
2307
                                      int input_width, int input_height);
2308

    
2309
/**
2310
 * @deprecated Use the software scaler (swscale) instead.
2311
 */
2312
attribute_deprecated ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
2313
                                      int iwidth, int iheight,
2314
                                      int topBand, int bottomBand,
2315
                                      int leftBand, int rightBand,
2316
                                      int padtop, int padbottom,
2317
                                      int padleft, int padright);
2318

    
2319
/**
2320
 * @deprecated Use the software scaler (swscale) instead.
2321
 */
2322
attribute_deprecated void img_resample(struct ImgReSampleContext *s,
2323
                  AVPicture *output, const AVPicture *input);
2324

    
2325
/**
2326
 * @deprecated Use the software scaler (swscale) instead.
2327
 */
2328
attribute_deprecated void img_resample_close(struct ImgReSampleContext *s);
2329

    
2330
#endif
2331

    
2332
/**
2333
 * Allocate memory for a picture.  Call avpicture_free to free it.
2334
 *
2335
 * @param picture the picture to be filled in
2336
 * @param pix_fmt the format of the picture
2337
 * @param width the width of the picture
2338
 * @param height the height of the picture
2339
 * @return zero if successful, a negative value if not
2340
 */
2341
int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2342

    
2343
/**
2344
 * Free a picture previously allocated by avpicture_alloc().
2345
 *
2346
 * @param picture the AVPicture to be freed
2347
 */
2348
void avpicture_free(AVPicture *picture);
2349

    
2350
/**
2351
 * Fill in the AVPicture fields.
2352
 * The fields of the given AVPicture are filled in by using the 'ptr' address
2353
 * which points to the image data buffer. Depending on the specified picture
2354
 * format, one or multiple image data pointers and line sizes will be set.
2355
 * If a planar format is specified, several pointers will be set pointing to
2356
 * the different picture planes and the line sizes of the different planes
2357
 * will be stored in the lines_sizes array.
2358
 *
2359
 * @param picture AVPicture whose fields are to be filled in
2360
 * @param ptr Buffer which will contain or contains the actual image data
2361
 * @param pix_fmt The format in which the picture data is stored.
2362
 * @param width the width of the image in pixels
2363
 * @param height the height of the image in pixels
2364
 * @return size of the image data in bytes
2365
 */
2366
int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2367
                   int pix_fmt, int width, int height);
2368
int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2369
                     unsigned char *dest, int dest_size);
2370

    
2371
/**
2372
 * Calculate the size in bytes that a picture of the given width and height
2373
 * would occupy if stored in the given picture format.
2374
 *
2375
 * @param pix_fmt the given picture format
2376
 * @param width the width of the image
2377
 * @param height the height of the image
2378
 * @return Image data size in bytes
2379
 */
2380
int avpicture_get_size(int pix_fmt, int width, int height);
2381
void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2382
const char *avcodec_get_pix_fmt_name(int pix_fmt);
2383
void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2384
enum PixelFormat avcodec_get_pix_fmt(const char* name);
2385
unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2386

    
2387
#define FF_LOSS_RESOLUTION  0x0001 /**< loss due to resolution change */
2388
#define FF_LOSS_DEPTH       0x0002 /**< loss due to color depth change */
2389
#define FF_LOSS_COLORSPACE  0x0004 /**< loss due to color space conversion */
2390
#define FF_LOSS_ALPHA       0x0008 /**< loss of alpha bits */
2391
#define FF_LOSS_COLORQUANT  0x0010 /**< loss due to color quantization */
2392
#define FF_LOSS_CHROMA      0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
2393

    
2394
/**
2395
 * Computes what kind of losses will occur when converting from one specific
2396
 * pixel format to another.
2397
 * When converting from one pixel format to another, information loss may occur.
2398
 * For example, when converting from RGB24 to GRAY, the color information will
2399
 * be lost. Similarly, other losses occur when converting from some formats to
2400
 * other formats. These losses can involve loss of chroma, but also loss of
2401
 * resolution, loss of color depth, loss due to the color space conversion, loss
2402
 * of the alpha bits or loss due to color quantization.
2403
 * avcodec_get_fix_fmt_loss() informs you about the various types of losses
2404
 * which will occur when converting from one pixel format to another.
2405
 *
2406
 * @param[in] dst_pix_fmt destination pixel format
2407
 * @param[in] src_pix_fmt source pixel format
2408
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
2409
 * @return Combination of flags informing you what kind of losses will occur.
2410
 */
2411
int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2412
                             int has_alpha);
2413

    
2414
/**
2415
 * Finds the best pixel format to convert to given a certain source pixel
2416
 * format.  When converting from one pixel format to another, information loss
2417
 * may occur.  For example, when converting from RGB24 to GRAY, the color
2418
 * information will be lost. Similarly, other losses occur when converting from
2419
 * some formats to other formats. avcodec_find_best_pix_fmt() searches which of
2420
 * the given pixel formats should be used to suffer the least amount of loss.
2421
 * The pixel formats from which it chooses one, are determined by the
2422
 * \p pix_fmt_mask parameter.
2423
 *
2424
 * @code
2425
 * src_pix_fmt = PIX_FMT_YUV420P;
2426
 * pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << PIX_FMT_RGB24);
2427
 * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
2428
 * @endcode
2429
 *
2430
 * @param[in] pix_fmt_mask bitmask determining which pixel format to choose from
2431
 * @param[in] src_pix_fmt source pixel format
2432
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
2433
 * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
2434
 * @return The best pixel format to convert to or -1 if none was found.
2435
 */
2436
int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2437
                              int has_alpha, int *loss_ptr);
2438

    
2439

    
2440
/**
2441
 * Print in buf the string corresponding to the pixel format with
2442
 * number pix_fmt, or an header if pix_fmt is negative.
2443
 *
2444
 * @param[in] buf the buffer where to write the string
2445
 * @param[in] buf_size the size of buf
2446
 * @param[in] pix_fmt the number of the pixel format to print the corresponding info string, or
2447
 * a negative value to print the corresponding header.
2448
 * Meaningful values for obtaining a pixel format info vary from 0 to PIX_FMT_NB -1.
2449
 */
2450
void avcodec_pix_fmt_string (char *buf, int buf_size, int pix_fmt);
2451

    
2452
#define FF_ALPHA_TRANSP       0x0001 /* image has some totally transparent pixels */
2453
#define FF_ALPHA_SEMI_TRANSP  0x0002 /* image has some transparent pixels */
2454

    
2455
/**
2456
 * Tell if an image really has transparent alpha values.
2457
 * @return ored mask of FF_ALPHA_xxx constants
2458
 */
2459
int img_get_alpha_info(const AVPicture *src,
2460
                       int pix_fmt, int width, int height);
2461

    
2462
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2463
/**
2464
 * convert among pixel formats
2465
 * @deprecated Use the software scaler (swscale) instead.
2466
 */
2467
attribute_deprecated int img_convert(AVPicture *dst, int dst_pix_fmt,
2468
                const AVPicture *src, int pix_fmt,
2469
                int width, int height);
2470
#endif
2471

    
2472
/* deinterlace a picture */
2473
/* deinterlace - if not supported return -1 */
2474
int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2475
                          int pix_fmt, int width, int height);
2476

    
2477
/* external high level API */
2478

    
2479
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2480
extern AVCodec *first_avcodec;
2481
#endif
2482
AVCodec *av_codec_next(AVCodec *c);
2483

    
2484
/* returns LIBAVCODEC_VERSION_INT constant */
2485
unsigned avcodec_version(void);
2486
/* returns LIBAVCODEC_BUILD constant */
2487
unsigned avcodec_build(void);
2488

    
2489
/**
2490
 * Initializes libavcodec.
2491
 *
2492
 * @warning This function \e must be called before any other libavcodec
2493
 * function.
2494
 */
2495
void avcodec_init(void);
2496

    
2497
void register_avcodec(AVCodec *format);
2498

    
2499
/**
2500
 * Finds a registered encoder with a matching codec ID.
2501
 *
2502
 * @param id CodecID of the requested encoder
2503
 * @return An encoder if one was found, NULL otherwise.
2504
 */
2505
AVCodec *avcodec_find_encoder(enum CodecID id);
2506

    
2507
/**
2508
 * Finds a registered encoder with the specified name.
2509
 *
2510
 * @param name name of the requested encoder
2511
 * @return An encoder if one was found, NULL otherwise.
2512
 */
2513
AVCodec *avcodec_find_encoder_by_name(const char *name);
2514

    
2515
/**
2516
 * Finds a registered decoder with a matching codec ID.
2517
 *
2518
 * @param id CodecID of the requested decoder
2519
 * @return A decoder if one was found, NULL otherwise.
2520
 */
2521
AVCodec *avcodec_find_decoder(enum CodecID id);
2522

    
2523
/**
2524
 * Finds a registered decoder with the specified name.
2525
 *
2526
 * @param name name of the requested decoder
2527
 * @return A decoder if one was found, NULL otherwise.
2528
 */
2529
AVCodec *avcodec_find_decoder_by_name(const char *name);
2530
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2531

    
2532
/**
2533
 * Sets the fields of the given AVCodecContext to default values.
2534
 *
2535
 * @param s The AVCodecContext of which the fields should be set to default values.
2536
 */
2537
void avcodec_get_context_defaults(AVCodecContext *s);
2538

    
2539
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
2540
 *  we WILL change its arguments and name a few times! */
2541
void avcodec_get_context_defaults2(AVCodecContext *s, enum CodecType);
2542

    
2543
/**
2544
 * Allocates an AVCodecContext and sets its fields to default values.  The
2545
 * resulting struct can be deallocated by simply calling av_free().
2546
 *
2547
 * @return An AVCodecContext filled with default values or NULL on failure.
2548
 * @see avcodec_get_context_defaults
2549
 */
2550
AVCodecContext *avcodec_alloc_context(void);
2551

    
2552
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
2553
 *  we WILL change its arguments and name a few times! */
2554
AVCodecContext *avcodec_alloc_context2(enum CodecType);
2555

    
2556
/**
2557
 * Sets the fields of the given AVFrame to default values.
2558
 *
2559
 * @param pic The AVFrame of which the fields should be set to default values.
2560
 */
2561
void avcodec_get_frame_defaults(AVFrame *pic);
2562

    
2563
/**
2564
 * Allocates an AVFrame and sets its fields to default values.  The resulting
2565
 * struct can be deallocated by simply calling av_free().
2566
 *
2567
 * @return An AVFrame filled with default values or NULL on failure.
2568
 * @see avcodec_get_frame_defaults
2569
 */
2570
AVFrame *avcodec_alloc_frame(void);
2571

    
2572
int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2573
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2574
int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2575
void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2576

    
2577
/**
2578
 * Checks if the given dimension of a picture is valid, meaning that all
2579
 * bytes of the picture can be addressed with a signed int.
2580
 *
2581
 * @param[in] w Width of the picture.
2582
 * @param[in] h Height of the picture.
2583
 * @return Zero if valid, a negative value if invalid.
2584
 */
2585
int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2586
enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2587

    
2588
int avcodec_thread_init(AVCodecContext *s, int thread_count);
2589
void avcodec_thread_free(AVCodecContext *s);
2590
int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2591
int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2592
//FIXME func typedef
2593

    
2594
/**
2595
 * Initializes the AVCodecContext to use the given AVCodec. Prior to using this
2596
 * function the context has to be allocated.
2597
 *
2598
 * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
2599
 * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
2600
 * retrieving a codec.
2601
 *
2602
 * @warning This function is not thread safe!
2603
 *
2604
 * @code
2605
 * avcodec_register_all();
2606
 * codec = avcodec_find_decoder(CODEC_ID_H264);
2607
 * if (!codec)
2608
 *     exit(1);
2609
 *
2610
 * context = avcodec_alloc_context();
2611
 *
2612
 * if (avcodec_open(context, codec) < 0)
2613
 *     exit(1);
2614
 * @endcode
2615
 *
2616
 * @param avctx The context which will be set up to use the given codec.
2617
 * @param codec The codec to use within the context.
2618
 * @return zero on success, a negative value on error
2619
 * @see avcodec_alloc_context, avcodec_find_decoder, avcodec_find_encoder
2620
 */
2621
int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2622

    
2623
/**
2624
 * @deprecated Use avcodec_decode_audio2() instead.
2625
 */
2626
attribute_deprecated int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2627
                         int *frame_size_ptr,
2628
                         const uint8_t *buf, int buf_size);
2629

    
2630
/**
2631
 * Decodes an audio frame from \p buf into \p samples.
2632
 * The avcodec_decode_audio2() function decodes an audio frame from the input
2633
 * buffer \p buf of size \p buf_size. To decode it, it makes use of the
2634
 * audio codec which was coupled with \p avctx using avcodec_open(). The
2635
 * resulting decoded frame is stored in output buffer \p samples.  If no frame
2636
 * could be decompressed, \p frame_size_ptr is zero. Otherwise, it is the
2637
 * decompressed frame size in \e bytes.
2638
 *
2639
 * @warning You \e must set \p frame_size_ptr to the allocated size of the
2640
 * output buffer before calling avcodec_decode_audio2().
2641
 *
2642
 * @warning The input buffer must be \c FF_INPUT_BUFFER_PADDING_SIZE larger than
2643
 * the actual read bytes because some optimized bitstream readers read 32 or 64
2644
 * bits at once and could read over the end.
2645
 *
2646
 * @warning The end of the input buffer \p buf should be set to 0 to ensure that
2647
 * no overreading happens for damaged MPEG streams.
2648
 *
2649
 * @note You might have to align the input buffer \p buf and output buffer \p
2650
 * samples. The alignment requirements depend on the CPU: On some CPUs it isn't
2651
 * necessary at all, on others it won't work at all if not aligned and on others
2652
 * it will work but it will have an impact on performance. In practice, the
2653
 * bitstream should have 4 byte alignment at minimum and all sample data should
2654
 * be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If
2655
 * the linesize is not a multiple of 16 then there's no sense in aligning the
2656
 * start of the buffer to 16.
2657
 *
2658
 * @param avctx the codec context
2659
 * @param[out] samples the output buffer
2660
 * @param[in,out] frame_size_ptr the output buffer size in bytes
2661
 * @param[in] buf the input buffer
2662
 * @param[in] buf_size the input buffer size in bytes
2663
 * @return On error a negative value is returned, otherwise the number of bytes
2664
 * used or zero if no frame could be decompressed.
2665
 */
2666
int avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
2667
                         int *frame_size_ptr,
2668
                         const uint8_t *buf, int buf_size);
2669

    
2670
/**
2671
 * Decodes a video frame from \p buf into \p picture.
2672
 * The avcodec_decode_video() function decodes a video frame from the input
2673
 * buffer \p buf of size \p buf_size. To decode it, it makes use of the
2674
 * video codec which was coupled with \p avctx using avcodec_open(). The
2675
 * resulting decoded frame is stored in \p picture.
2676
 *
2677
 * @warning The input buffer must be \c FF_INPUT_BUFFER_PADDING_SIZE larger than
2678
 * the actual read bytes because some optimized bitstream readers read 32 or 64
2679
 * bits at once and could read over the end.
2680
 *
2681
 * @warning The end of the input buffer \p buf should be set to 0 to ensure that
2682
 * no overreading happens for damaged MPEG streams.
2683
 *
2684
 * @note You might have to align the input buffer \p buf and output buffer \p
2685
 * samples. The alignment requirements depend on the CPU: on some CPUs it isn't
2686
 * necessary at all, on others it won't work at all if not aligned and on others
2687
 * it will work but it will have an impact on performance. In practice, the
2688
 * bitstream should have 4 byte alignment at minimum and all sample data should
2689
 * be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If
2690
 * the linesize is not a multiple of 16 then there's no sense in aligning the
2691
 * start of the buffer to 16.
2692
 *
2693
 * @param avctx the codec context
2694
 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
2695
 * @param[in] buf the input buffer
2696
 * @param[in] buf_size the size of the input buffer in bytes
2697
 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
2698
 * @return On error a negative value is returned, otherwise the number of bytes
2699
 * used or zero if no frame could be decompressed.
2700
 */
2701
int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2702
                         int *got_picture_ptr,
2703
                         const uint8_t *buf, int buf_size);
2704

    
2705
/* Decode a subtitle message. Return -1 if error, otherwise return the
2706
 * number of bytes used. If no subtitle could be decompressed,
2707
 * got_sub_ptr is zero. Otherwise, the subtitle is stored in *sub. */
2708
int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
2709
                            int *got_sub_ptr,
2710
                            const uint8_t *buf, int buf_size);
2711
int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2712
                        int *data_size_ptr,
2713
                        uint8_t *buf, int buf_size);
2714

    
2715
/**
2716
 * Encodes an audio frame from \p samples into \p buf.
2717
 * The avcodec_encode_audio() function encodes an audio frame from the input
2718
 * buffer \p samples. To encode it, it makes use of the audio codec which was
2719
 * coupled with \p avctx using avcodec_open(). The resulting encoded frame is
2720
 * stored in output buffer \p buf.
2721
 *
2722
 * @note The output buffer should be at least \c FF_MIN_BUFFER_SIZE bytes large.
2723
 *
2724
 * @param avctx the codec context
2725
 * @param[out] buf the output buffer
2726
 * @param[in] buf_size the output buffer size
2727
 * @param[in] samples the input buffer containing the samples
2728
 * The number of samples read from this buffer is frame_size*channels,
2729
 * both of which are defined in \p avctx.
2730
 * @return On error a negative value is returned, on success zero or the number
2731
 * of bytes used to encode the data read from the input buffer.
2732
 */
2733
int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2734
                         const short *samples);
2735

    
2736
/**
2737
 * Encodes a video frame from \p pict into \p buf.
2738
 * The avcodec_encode_video() function encodes a video frame from the input
2739
 * \p pict. To encode it, it makes use of the video codec which was coupled with
2740
 * \p avctx using avcodec_open(). The resulting encoded bytes representing the
2741
 * frame are stored in the output buffer \p buf. The input picture should be
2742
 * stored using a specific format, namely \c avctx.pix_fmt.
2743
 *
2744
 * @param avctx the codec context
2745
 * @param[out] buf the output buffer for the bitstream of encoded frame
2746
 * @param[in] buf_size the size of the output buffer in bytes
2747
 * @param[in] pict the input picture to encode
2748
 * @return On error a negative value is returned, on success zero or the number
2749
 * of bytes used from the input buffer.
2750
 */
2751
int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2752
                         const AVFrame *pict);
2753
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2754
                            const AVSubtitle *sub);
2755

    
2756
int avcodec_close(AVCodecContext *avctx);
2757

    
2758
void avcodec_register_all(void);
2759

    
2760
/**
2761
 * Flush buffers, should be called when seeking or when switching to a different stream.
2762
 */
2763
void avcodec_flush_buffers(AVCodecContext *avctx);
2764

    
2765
void avcodec_default_free_buffers(AVCodecContext *s);
2766

    
2767
/* misc useful functions */
2768

    
2769
/**
2770
 * Returns a single letter to describe the given picture type \p pict_type.
2771
 *
2772
 * @param[in] pict_type the picture type
2773
 * @return A single character representing the picture type.
2774
 */
2775
char av_get_pict_type_char(int pict_type);
2776

    
2777
/**
2778
 * Returns codec bits per sample.
2779
 *
2780
 * @param[in] codec_id the codec
2781
 * @return Number of bits per sample or zero if unknown for the given codec.
2782
 */
2783
int av_get_bits_per_sample(enum CodecID codec_id);
2784

    
2785
/**
2786
 * Returns sample format bits per sample.
2787
 *
2788
 * @param[in] sample_fmt the sample format
2789
 * @return Number of bits per sample or zero if unknown for the given sample format.
2790
 */
2791
int av_get_bits_per_sample_format(enum SampleFormat sample_fmt);
2792

    
2793
/* frame parsing */
2794
typedef struct AVCodecParserContext {
2795
    void *priv_data;
2796
    struct AVCodecParser *parser;
2797
    int64_t frame_offset; /* offset of the current frame */
2798
    int64_t cur_offset; /* current offset
2799
                           (incremented by each av_parser_parse()) */
2800
    int64_t last_frame_offset; /* offset of the last frame */
2801
    /* video info */
2802
    int pict_type; /* XXX: Put it back in AVCodecContext. */
2803
    int repeat_pict; /* XXX: Put it back in AVCodecContext. */
2804
    int64_t pts;     /* pts of the current frame */
2805
    int64_t dts;     /* dts of the current frame */
2806

    
2807
    /* private data */
2808
    int64_t last_pts;
2809
    int64_t last_dts;
2810
    int fetch_timestamp;
2811

    
2812
#define AV_PARSER_PTS_NB 4
2813
    int cur_frame_start_index;
2814
    int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2815
    int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2816
    int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2817

    
2818
    int flags;
2819
#define PARSER_FLAG_COMPLETE_FRAMES           0x0001
2820

    
2821
    int64_t offset;      ///< byte offset from starting packet start
2822
    int64_t last_offset;
2823
} AVCodecParserContext;
2824

    
2825
typedef struct AVCodecParser {
2826
    int codec_ids[5]; /* several codec IDs are permitted */
2827
    int priv_data_size;
2828
    int (*parser_init)(AVCodecParserContext *s);
2829
    int (*parser_parse)(AVCodecParserContext *s,
2830
                        AVCodecContext *avctx,
2831
                        const uint8_t **poutbuf, int *poutbuf_size,
2832
                        const uint8_t *buf, int buf_size);
2833
    void (*parser_close)(AVCodecParserContext *s);
2834
    int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
2835
    struct AVCodecParser *next;
2836
} AVCodecParser;
2837

    
2838
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2839
extern AVCodecParser *av_first_parser;
2840
#endif
2841
AVCodecParser *av_parser_next(AVCodecParser *c);
2842

    
2843
void av_register_codec_parser(AVCodecParser *parser);
2844
AVCodecParserContext *av_parser_init(int codec_id);
2845
int av_parser_parse(AVCodecParserContext *s,
2846
                    AVCodecContext *avctx,
2847
                    uint8_t **poutbuf, int *poutbuf_size,
2848
                    const uint8_t *buf, int buf_size,
2849
                    int64_t pts, int64_t dts);
2850
int av_parser_change(AVCodecParserContext *s,
2851
                     AVCodecContext *avctx,
2852
                     uint8_t **poutbuf, int *poutbuf_size,
2853
                     const uint8_t *buf, int buf_size, int keyframe);
2854
void av_parser_close(AVCodecParserContext *s);
2855

    
2856

    
2857
typedef struct AVBitStreamFilterContext {
2858
    void *priv_data;
2859
    struct AVBitStreamFilter *filter;
2860
    AVCodecParserContext *parser;
2861
    struct AVBitStreamFilterContext *next;
2862
} AVBitStreamFilterContext;
2863

    
2864

    
2865
typedef struct AVBitStreamFilter {
2866
    const char *name;
2867
    int priv_data_size;
2868
    int (*filter)(AVBitStreamFilterContext *bsfc,
2869
                  AVCodecContext *avctx, const char *args,
2870
                  uint8_t **poutbuf, int *poutbuf_size,
2871
                  const uint8_t *buf, int buf_size, int keyframe);
2872
    void (*close)(AVBitStreamFilterContext *bsfc);
2873
    struct AVBitStreamFilter *next;
2874
} AVBitStreamFilter;
2875

    
2876
void av_register_bitstream_filter(AVBitStreamFilter *bsf);
2877
AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
2878
int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
2879
                               AVCodecContext *avctx, const char *args,
2880
                               uint8_t **poutbuf, int *poutbuf_size,
2881
                               const uint8_t *buf, int buf_size, int keyframe);
2882
void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
2883

    
2884
AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f);
2885

    
2886
/* memory */
2887

    
2888
/**
2889
 * Reallocates the given block if it is not large enough, otherwise it
2890
 * does nothing.
2891
 *
2892
 * @see av_realloc
2893
 */
2894
void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2895

    
2896
/* for static data only */
2897

    
2898
/**
2899
 * Frees all static arrays and resets their pointers to 0.
2900
 * Call this function to release all statically allocated tables.
2901
 *
2902
 * @deprecated. Code which uses av_free_static is broken/misdesigned
2903
 * and should correctly use static arrays
2904
 *
2905
 */
2906
attribute_deprecated void av_free_static(void);
2907

    
2908
/**
2909
 * Allocation of static arrays.
2910
 *
2911
 * @warning Do not use for normal allocation.
2912
 *
2913
 * @param[in] size The amount of memory you need in bytes.
2914
 * @return block of memory of the requested size
2915
 * @deprecated. Code which uses av_mallocz_static is broken/misdesigned
2916
 * and should correctly use static arrays
2917
 */
2918
attribute_deprecated void *av_mallocz_static(unsigned int size);
2919

    
2920
/**
2921
 * Copy image 'src' to 'dst'.
2922
 */
2923
void av_picture_copy(AVPicture *dst, const AVPicture *src,
2924
              int pix_fmt, int width, int height);
2925

    
2926
/**
2927
 * Crop image top and left side.
2928
 */
2929
int av_picture_crop(AVPicture *dst, const AVPicture *src,
2930
             int pix_fmt, int top_band, int left_band);
2931

    
2932
/**
2933
 * Pad image.
2934
 */
2935
int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
2936
            int padtop, int padbottom, int padleft, int padright, int *color);
2937

    
2938
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2939
/**
2940
 * @deprecated Use the software scaler (swscale) instead.
2941
 */
2942
attribute_deprecated void img_copy(AVPicture *dst, const AVPicture *src,
2943
              int pix_fmt, int width, int height);
2944

    
2945
/**
2946
 * @deprecated Use the software scaler (swscale) instead.
2947
 */
2948
attribute_deprecated int img_crop(AVPicture *dst, const AVPicture *src,
2949
             int pix_fmt, int top_band, int left_band);
2950

    
2951
/**
2952
 * @deprecated Use the software scaler (swscale) instead.
2953
 */
2954
attribute_deprecated int img_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
2955
            int padtop, int padbottom, int padleft, int padright, int *color);
2956
#endif
2957

    
2958
extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
2959

    
2960
/**
2961
 * Parses \p str and put in \p width_ptr and \p height_ptr the detected values.
2962
 *
2963
 * @return 0 in case of a successful parsing, a negative value otherwise
2964
 * @param[in] str the string to parse: it has to be a string in the format
2965
 * <width>x<height> or a valid video frame size abbreviation.
2966
 * @param[in,out] width_ptr pointer to the variable which will contain the detected
2967
 * frame width value
2968
 * @param[in,out] height_ptr pointer to the variable which will contain the detected
2969
 * frame height value
2970
 */
2971
int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str);
2972

    
2973
/**
2974
 * Parses \p str and put in \p frame_rate the detected values.
2975
 *
2976
 * @return 0 in case of a successful parsing, a negative value otherwise
2977
 * @param[in] str the string to parse: it has to be a string in the format
2978
 * <frame_rate_nom>/<frame_rate_den>, a float number or a valid video rate abbreviation
2979
 * @param[in,out] frame_rate pointer to the AVRational which will contain the detected
2980
 * frame rate
2981
 */
2982
int av_parse_video_frame_rate(AVRational *frame_rate, const char *str);
2983

    
2984
/* error handling */
2985
#if EINVAL > 0
2986
#define AVERROR(e) (-(e)) /**< Returns a negative error code from a POSIX error code, to return from library functions. */
2987
#define AVUNERROR(e) (-(e)) /**< Returns a POSIX error code from a library function error return value. */
2988
#else
2989
/* Some platforms have E* and errno already negated. */
2990
#define AVERROR(e) (e)
2991
#define AVUNERROR(e) (e)
2992
#endif
2993
#define AVERROR_UNKNOWN     AVERROR(EINVAL)  /**< unknown error */
2994
#define AVERROR_IO          AVERROR(EIO)     /**< I/O error */
2995
#define AVERROR_NUMEXPECTED AVERROR(EDOM)    /**< Number syntax expected in filename. */
2996
#define AVERROR_INVALIDDATA AVERROR(EINVAL)  /**< invalid data found */
2997
#define AVERROR_NOMEM       AVERROR(ENOMEM)  /**< not enough memory */
2998
#define AVERROR_NOFMT       AVERROR(EILSEQ)  /**< unknown format */
2999
#define AVERROR_NOTSUPP     AVERROR(ENOSYS)  /**< Operation not supported. */
3000
#define AVERROR_NOENT       AVERROR(ENOENT)  /**< No such file or directory. */
3001
#define AVERROR_PATCHWELCOME    -MKTAG('P','A','W','E') /**< Not yet implemented in FFmpeg. Patches welcome. */
3002

    
3003
#endif /* FFMPEG_AVCODEC_H */