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Theora encoding via libtheora.
[libav.git] / libavcodec / avcodec.h
1 /*
2 * copyright (c) 2001 Fabrice Bellard
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #ifndef AVCODEC_H
22 #define AVCODEC_H
23
24 /**
25 * @file avcodec.h
26 * external api header.
27 */
28
29
30 #ifdef __cplusplus
31 extern "C" {
32 #endif
33
34 #include "avutil.h"
35 #include <sys/types.h> /* size_t */
36
37 #define AV_STRINGIFY(s) AV_TOSTRING(s)
38 #define AV_TOSTRING(s) #s
39
40 #define LIBAVCODEC_VERSION_INT ((51<<16)+(29<<8)+0)
41 #define LIBAVCODEC_VERSION 51.29.0
42 #define LIBAVCODEC_BUILD LIBAVCODEC_VERSION_INT
43
44 #define LIBAVCODEC_IDENT "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
45
46 #define AV_NOPTS_VALUE INT64_C(0x8000000000000000)
47 #define AV_TIME_BASE 1000000
48 #define AV_TIME_BASE_Q (AVRational){1, AV_TIME_BASE}
49
50 enum CodecID {
51 CODEC_ID_NONE,
52 CODEC_ID_MPEG1VIDEO,
53 CODEC_ID_MPEG2VIDEO, /* prefered ID for MPEG Video 1 or 2 decoding */
54 CODEC_ID_MPEG2VIDEO_XVMC,
55 CODEC_ID_H261,
56 CODEC_ID_H263,
57 CODEC_ID_RV10,
58 CODEC_ID_RV20,
59 CODEC_ID_MJPEG,
60 CODEC_ID_MJPEGB,
61 CODEC_ID_LJPEG,
62 CODEC_ID_SP5X,
63 CODEC_ID_JPEGLS,
64 CODEC_ID_MPEG4,
65 CODEC_ID_RAWVIDEO,
66 CODEC_ID_MSMPEG4V1,
67 CODEC_ID_MSMPEG4V2,
68 CODEC_ID_MSMPEG4V3,
69 CODEC_ID_WMV1,
70 CODEC_ID_WMV2,
71 CODEC_ID_H263P,
72 CODEC_ID_H263I,
73 CODEC_ID_FLV1,
74 CODEC_ID_SVQ1,
75 CODEC_ID_SVQ3,
76 CODEC_ID_DVVIDEO,
77 CODEC_ID_HUFFYUV,
78 CODEC_ID_CYUV,
79 CODEC_ID_H264,
80 CODEC_ID_INDEO3,
81 CODEC_ID_VP3,
82 CODEC_ID_THEORA,
83 CODEC_ID_ASV1,
84 CODEC_ID_ASV2,
85 CODEC_ID_FFV1,
86 CODEC_ID_4XM,
87 CODEC_ID_VCR1,
88 CODEC_ID_CLJR,
89 CODEC_ID_MDEC,
90 CODEC_ID_ROQ,
91 CODEC_ID_INTERPLAY_VIDEO,
92 CODEC_ID_XAN_WC3,
93 CODEC_ID_XAN_WC4,
94 CODEC_ID_RPZA,
95 CODEC_ID_CINEPAK,
96 CODEC_ID_WS_VQA,
97 CODEC_ID_MSRLE,
98 CODEC_ID_MSVIDEO1,
99 CODEC_ID_IDCIN,
100 CODEC_ID_8BPS,
101 CODEC_ID_SMC,
102 CODEC_ID_FLIC,
103 CODEC_ID_TRUEMOTION1,
104 CODEC_ID_VMDVIDEO,
105 CODEC_ID_MSZH,
106 CODEC_ID_ZLIB,
107 CODEC_ID_QTRLE,
108 CODEC_ID_SNOW,
109 CODEC_ID_TSCC,
110 CODEC_ID_ULTI,
111 CODEC_ID_QDRAW,
112 CODEC_ID_VIXL,
113 CODEC_ID_QPEG,
114 CODEC_ID_XVID,
115 CODEC_ID_PNG,
116 CODEC_ID_PPM,
117 CODEC_ID_PBM,
118 CODEC_ID_PGM,
119 CODEC_ID_PGMYUV,
120 CODEC_ID_PAM,
121 CODEC_ID_FFVHUFF,
122 CODEC_ID_RV30,
123 CODEC_ID_RV40,
124 CODEC_ID_VC1,
125 CODEC_ID_WMV3,
126 CODEC_ID_LOCO,
127 CODEC_ID_WNV1,
128 CODEC_ID_AASC,
129 CODEC_ID_INDEO2,
130 CODEC_ID_FRAPS,
131 CODEC_ID_TRUEMOTION2,
132 CODEC_ID_BMP,
133 CODEC_ID_CSCD,
134 CODEC_ID_MMVIDEO,
135 CODEC_ID_ZMBV,
136 CODEC_ID_AVS,
137 CODEC_ID_SMACKVIDEO,
138 CODEC_ID_NUV,
139 CODEC_ID_KMVC,
140 CODEC_ID_FLASHSV,
141 CODEC_ID_CAVS,
142 CODEC_ID_JPEG2000,
143 CODEC_ID_VMNC,
144 CODEC_ID_VP5,
145 CODEC_ID_VP6,
146 CODEC_ID_VP6F,
147 CODEC_ID_TARGA,
148 CODEC_ID_DSICINVIDEO,
149 CODEC_ID_TIERTEXSEQVIDEO,
150 CODEC_ID_TIFF,
151 CODEC_ID_GIF,
152 CODEC_ID_FFH264,
153
154 /* various pcm "codecs" */
155 CODEC_ID_PCM_S16LE= 0x10000,
156 CODEC_ID_PCM_S16BE,
157 CODEC_ID_PCM_U16LE,
158 CODEC_ID_PCM_U16BE,
159 CODEC_ID_PCM_S8,
160 CODEC_ID_PCM_U8,
161 CODEC_ID_PCM_MULAW,
162 CODEC_ID_PCM_ALAW,
163 CODEC_ID_PCM_S32LE,
164 CODEC_ID_PCM_S32BE,
165 CODEC_ID_PCM_U32LE,
166 CODEC_ID_PCM_U32BE,
167 CODEC_ID_PCM_S24LE,
168 CODEC_ID_PCM_S24BE,
169 CODEC_ID_PCM_U24LE,
170 CODEC_ID_PCM_U24BE,
171 CODEC_ID_PCM_S24DAUD,
172
173 /* various adpcm codecs */
174 CODEC_ID_ADPCM_IMA_QT= 0x11000,
175 CODEC_ID_ADPCM_IMA_WAV,
176 CODEC_ID_ADPCM_IMA_DK3,
177 CODEC_ID_ADPCM_IMA_DK4,
178 CODEC_ID_ADPCM_IMA_WS,
179 CODEC_ID_ADPCM_IMA_SMJPEG,
180 CODEC_ID_ADPCM_MS,
181 CODEC_ID_ADPCM_4XM,
182 CODEC_ID_ADPCM_XA,
183 CODEC_ID_ADPCM_ADX,
184 CODEC_ID_ADPCM_EA,
185 CODEC_ID_ADPCM_G726,
186 CODEC_ID_ADPCM_CT,
187 CODEC_ID_ADPCM_SWF,
188 CODEC_ID_ADPCM_YAMAHA,
189 CODEC_ID_ADPCM_SBPRO_4,
190 CODEC_ID_ADPCM_SBPRO_3,
191 CODEC_ID_ADPCM_SBPRO_2,
192
193 /* AMR */
194 CODEC_ID_AMR_NB= 0x12000,
195 CODEC_ID_AMR_WB,
196
197 /* RealAudio codecs*/
198 CODEC_ID_RA_144= 0x13000,
199 CODEC_ID_RA_288,
200
201 /* various DPCM codecs */
202 CODEC_ID_ROQ_DPCM= 0x14000,
203 CODEC_ID_INTERPLAY_DPCM,
204 CODEC_ID_XAN_DPCM,
205 CODEC_ID_SOL_DPCM,
206
207 CODEC_ID_MP2= 0x15000,
208 CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
209 CODEC_ID_AAC,
210 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
211 CODEC_ID_MPEG4AAC,
212 #endif
213 CODEC_ID_AC3,
214 CODEC_ID_DTS,
215 CODEC_ID_VORBIS,
216 CODEC_ID_DVAUDIO,
217 CODEC_ID_WMAV1,
218 CODEC_ID_WMAV2,
219 CODEC_ID_MACE3,
220 CODEC_ID_MACE6,
221 CODEC_ID_VMDAUDIO,
222 CODEC_ID_SONIC,
223 CODEC_ID_SONIC_LS,
224 CODEC_ID_FLAC,
225 CODEC_ID_MP3ADU,
226 CODEC_ID_MP3ON4,
227 CODEC_ID_SHORTEN,
228 CODEC_ID_ALAC,
229 CODEC_ID_WESTWOOD_SND1,
230 CODEC_ID_GSM,
231 CODEC_ID_QDM2,
232 CODEC_ID_COOK,
233 CODEC_ID_TRUESPEECH,
234 CODEC_ID_TTA,
235 CODEC_ID_SMACKAUDIO,
236 CODEC_ID_QCELP,
237 CODEC_ID_WAVPACK,
238 CODEC_ID_DSICINAUDIO,
239 CODEC_ID_IMC,
240 CODEC_ID_MUSEPACK7,
241
242 /* subtitle codecs */
243 CODEC_ID_DVD_SUBTITLE= 0x17000,
244 CODEC_ID_DVB_SUBTITLE,
245
246 CODEC_ID_MPEG2TS= 0x20000, /* _FAKE_ codec to indicate a raw MPEG2 transport
247 stream (only used by libavformat) */
248 };
249
250 /* CODEC_ID_MP3LAME is absolete */
251 #define CODEC_ID_MP3LAME CODEC_ID_MP3
252
253 enum CodecType {
254 CODEC_TYPE_UNKNOWN = -1,
255 CODEC_TYPE_VIDEO,
256 CODEC_TYPE_AUDIO,
257 CODEC_TYPE_DATA,
258 CODEC_TYPE_SUBTITLE,
259 };
260
261 /* currently unused, may be used if 24/32 bits samples ever supported */
262 /* all in native endian */
263 enum SampleFormat {
264 SAMPLE_FMT_NONE = -1,
265 SAMPLE_FMT_U8, ///< unsigned 8 bits
266 SAMPLE_FMT_S16, ///< signed 16 bits
267 SAMPLE_FMT_S24, ///< signed 24 bits
268 SAMPLE_FMT_S32, ///< signed 32 bits
269 SAMPLE_FMT_FLT, ///< float
270 };
271
272 /* in bytes */
273 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
274
275 /**
276 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
277 * this is mainly needed because some optimized bitstream readers read
278 * 32 or 64 bit at once and could read over the end<br>
279 * Note, if the first 23 bits of the additional bytes are not 0 then damaged
280 * MPEG bitstreams could cause overread and segfault
281 */
282 #define FF_INPUT_BUFFER_PADDING_SIZE 8
283
284 /**
285 * minimum encoding buffer size.
286 * used to avoid some checks during header writing
287 */
288 #define FF_MIN_BUFFER_SIZE 16384
289
290 /* motion estimation type, EPZS by default */
291 enum Motion_Est_ID {
292 ME_ZERO = 1,
293 ME_FULL,
294 ME_LOG,
295 ME_PHODS,
296 ME_EPZS,
297 ME_X1,
298 ME_HEX,
299 ME_UMH,
300 ME_ITER,
301 };
302
303 enum AVDiscard{
304 //we leave some space between them for extensions (drop some keyframes for intra only or drop just some bidir frames)
305 AVDISCARD_NONE =-16, ///< discard nothing
306 AVDISCARD_DEFAULT= 0, ///< discard useless packets like 0 size packets in avi
307 AVDISCARD_NONREF = 8, ///< discard all non reference
308 AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
309 AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
310 AVDISCARD_ALL = 48, ///< discard all
311 };
312
313 typedef struct RcOverride{
314 int start_frame;
315 int end_frame;
316 int qscale; // if this is 0 then quality_factor will be used instead
317 float quality_factor;
318 } RcOverride;
319
320 #define FF_MAX_B_FRAMES 16
321
322 /* encoding support
323 these flags can be passed in AVCodecContext.flags before initing
324 Note: not everything is supported yet.
325 */
326
327 #define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
328 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / Advanced prediction for H263
329 #define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
330 #define CODEC_FLAG_GMC 0x0020 ///< use GMC
331 #define CODEC_FLAG_MV0 0x0040 ///< always try a MB with MV=<0,0>
332 #define CODEC_FLAG_PART 0x0080 ///< use data partitioning
333 /* parent program gurantees that the input for b-frame containing streams is not written to
334 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
335 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
336 #define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
337 #define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
338 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
339 #define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
340 #define CODEC_FLAG_EMU_EDGE 0x4000///< don't draw edges
341 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
342 #define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
343 of only at frame boundaries */
344 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
345 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
346 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay
347 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
348 #define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
349 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
350 #define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
351 /* Fx : Flag for h263+ extra options */
352 #define CODEC_FLAG_H263P_AIC 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
353 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
354 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
355 #define CODEC_FLAG_CBP_RD 0x04000000 ///< use rate distortion optimization for cbp
356 #define CODEC_FLAG_QP_RD 0x08000000 ///< use rate distortion optimization for qp selectioon
357 #define CODEC_FLAG_H263P_AIV 0x00000008 ///< H263 Alternative inter vlc
358 #define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
359 #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
360 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
361 #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
362 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
363 #define CODEC_FLAG_CLOSED_GOP ((int)0x80000000)
364 #define CODEC_FLAG2_FAST 0x00000001 ///< allow non spec compliant speedup tricks
365 #define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< strictly enforce GOP size
366 #define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< skip bitstream encoding
367 #define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< place global headers at every keyframe instead of in extradata
368 #define CODEC_FLAG2_BPYRAMID 0x00000010 ///< H.264 allow b-frames to be used as references
369 #define CODEC_FLAG2_WPRED 0x00000020 ///< H.264 weighted biprediction for b-frames
370 #define CODEC_FLAG2_MIXED_REFS 0x00000040 ///< H.264 one reference per partition, as opposed to one reference per macroblock
371 #define CODEC_FLAG2_8X8DCT 0x00000080 ///< H.264 high profile 8x8 transform
372 #define CODEC_FLAG2_FASTPSKIP 0x00000100 ///< H.264 fast pskip
373 #define CODEC_FLAG2_AUD 0x00000200 ///< H.264 access unit delimiters
374 #define CODEC_FLAG2_BRDO 0x00000400 ///< b-frame rate-distortion optimization
375 #define CODEC_FLAG2_INTRA_VLC 0x00000800 ///< use MPEG-2 intra VLC table
376 #define CODEC_FLAG2_MEMC_ONLY 0x00001000 ///< only do ME/MC (I frames -> ref, P frame -> ME+MC)
377 #define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format
378 #define CODEC_FLAG2_SKIP_RD 0x00004000 ///< RD optimal MB level residual skiping
379
380 /* Unsupported options :
381 * Syntax Arithmetic coding (SAC)
382 * Reference Picture Selection
383 * Independant Segment Decoding */
384 /* /Fx */
385 /* codec capabilities */
386
387 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
388 /**
389 * Codec uses get_buffer() for allocating buffers.
390 * direct rendering method 1
391 */
392 #define CODEC_CAP_DR1 0x0002
393 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
394 used */
395 #define CODEC_CAP_PARSE_ONLY 0x0004
396 #define CODEC_CAP_TRUNCATED 0x0008
397 /* codec can export data for HW decoding (XvMC) */
398 #define CODEC_CAP_HWACCEL 0x0010
399 /**
400 * codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data.
401 * if this is not set, the codec is guranteed to never be feeded with NULL data
402 */
403 #define CODEC_CAP_DELAY 0x0020
404 /**
405 * Codec can be fed a final frame with a smaller size.
406 * This can be used to prevent truncation of the last audio samples.
407 */
408 #define CODEC_CAP_SMALL_LAST_FRAME 0x0040
409
410 //the following defines may change, don't expect compatibility if you use them
411 #define MB_TYPE_INTRA4x4 0x0001
412 #define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
413 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME h264 specific
414 #define MB_TYPE_16x16 0x0008
415 #define MB_TYPE_16x8 0x0010
416 #define MB_TYPE_8x16 0x0020
417 #define MB_TYPE_8x8 0x0040
418 #define MB_TYPE_INTERLACED 0x0080
419 #define MB_TYPE_DIRECT2 0x0100 //FIXME
420 #define MB_TYPE_ACPRED 0x0200
421 #define MB_TYPE_GMC 0x0400
422 #define MB_TYPE_SKIP 0x0800
423 #define MB_TYPE_P0L0 0x1000
424 #define MB_TYPE_P1L0 0x2000
425 #define MB_TYPE_P0L1 0x4000
426 #define MB_TYPE_P1L1 0x8000
427 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
428 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
429 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
430 #define MB_TYPE_QUANT 0x00010000
431 #define MB_TYPE_CBP 0x00020000
432 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
433
434 /**
435 * Pan Scan area.
436 * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
437 */
438 typedef struct AVPanScan{
439 /**
440 * id.
441 * - encoding: set by user.
442 * - decoding: set by lavc
443 */
444 int id;
445
446 /**
447 * width and height in 1/16 pel
448 * - encoding: set by user.
449 * - decoding: set by lavc
450 */
451 int width;
452 int height;
453
454 /**
455 * position of the top left corner in 1/16 pel for up to 3 fields/frames.
456 * - encoding: set by user.
457 * - decoding: set by lavc
458 */
459 int16_t position[3][2];
460 }AVPanScan;
461
462 #define FF_COMMON_FRAME \
463 /**\
464 * pointer to the picture planes.\
465 * this might be different from the first allocated byte\
466 * - encoding: \
467 * - decoding: \
468 */\
469 uint8_t *data[4];\
470 int linesize[4];\
471 /**\
472 * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
473 * this isn't used by lavc unless the default get/release_buffer() is used\
474 * - encoding: \
475 * - decoding: \
476 */\
477 uint8_t *base[4];\
478 /**\
479 * 1 -> keyframe, 0-> not\
480 * - encoding: set by lavc\
481 * - decoding: set by lavc\
482 */\
483 int key_frame;\
484 \
485 /**\
486 * picture type of the frame, see ?_TYPE below.\
487 * - encoding: set by lavc for coded_picture (and set by user for input)\
488 * - decoding: set by lavc\
489 */\
490 int pict_type;\
491 \
492 /**\
493 * presentation timestamp in time_base units (time when frame should be shown to user)\
494 * if AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed\
495 * - encoding: MUST be set by user\
496 * - decoding: set by lavc\
497 */\
498 int64_t pts;\
499 \
500 /**\
501 * picture number in bitstream order.\
502 * - encoding: set by\
503 * - decoding: set by lavc\
504 */\
505 int coded_picture_number;\
506 /**\
507 * picture number in display order.\
508 * - encoding: set by\
509 * - decoding: set by lavc\
510 */\
511 int display_picture_number;\
512 \
513 /**\
514 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
515 * - encoding: set by lavc for coded_picture (and set by user for input)\
516 * - decoding: set by lavc\
517 */\
518 int quality; \
519 \
520 /**\
521 * buffer age (1->was last buffer and dint change, 2->..., ...).\
522 * set to INT_MAX if the buffer has not been used yet \
523 * - encoding: unused\
524 * - decoding: MUST be set by get_buffer()\
525 */\
526 int age;\
527 \
528 /**\
529 * is this picture used as reference\
530 * - encoding: unused\
531 * - decoding: set by lavc (before get_buffer() call))\
532 */\
533 int reference;\
534 \
535 /**\
536 * QP table\
537 * - encoding: unused\
538 * - decoding: set by lavc\
539 */\
540 int8_t *qscale_table;\
541 /**\
542 * QP store stride\
543 * - encoding: unused\
544 * - decoding: set by lavc\
545 */\
546 int qstride;\
547 \
548 /**\
549 * mbskip_table[mb]>=1 if MB didnt change\
550 * stride= mb_width = (width+15)>>4\
551 * - encoding: unused\
552 * - decoding: set by lavc\
553 */\
554 uint8_t *mbskip_table;\
555 \
556 /**\
557 * Motion vector table.\
558 * @code\
559 * example:\
560 * int mv_sample_log2= 4 - motion_subsample_log2;\
561 * int mb_width= (width+15)>>4;\
562 * int mv_stride= (mb_width << mv_sample_log2) + 1;\
563 * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
564 * @endcode\
565 * - encoding: set by user\
566 * - decoding: set by lavc\
567 */\
568 int16_t (*motion_val[2])[2];\
569 \
570 /**\
571 * Macroblock type table\
572 * mb_type_base + mb_width + 2\
573 * - encoding: set by user\
574 * - decoding: set by lavc\
575 */\
576 uint32_t *mb_type;\
577 \
578 /**\
579 * log2 of the size of the block which a single vector in motion_val represents: \
580 * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
581 * - encoding: unused\
582 * - decoding: set by lavc\
583 */\
584 uint8_t motion_subsample_log2;\
585 \
586 /**\
587 * for some private data of the user\
588 * - encoding: unused\
589 * - decoding: set by user\
590 */\
591 void *opaque;\
592 \
593 /**\
594 * error\
595 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
596 * - decoding: unused\
597 */\
598 uint64_t error[4];\
599 \
600 /**\
601 * type of the buffer (to keep track of who has to dealloc data[*])\
602 * - encoding: set by the one who allocs it\
603 * - decoding: set by the one who allocs it\
604 * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
605 */\
606 int type;\
607 \
608 /**\
609 * when decoding, this signal how much the picture must be delayed.\
610 * extra_delay = repeat_pict / (2*fps)\
611 * - encoding: unused\
612 * - decoding: set by lavc\
613 */\
614 int repeat_pict;\
615 \
616 /**\
617 * \
618 */\
619 int qscale_type;\
620 \
621 /**\
622 * The content of the picture is interlaced.\
623 * - encoding: set by user\
624 * - decoding: set by lavc (default 0)\
625 */\
626 int interlaced_frame;\
627 \
628 /**\
629 * if the content is interlaced, is top field displayed first.\
630 * - encoding: set by user\
631 * - decoding: set by lavc\
632 */\
633 int top_field_first;\
634 \
635 /**\
636 * Pan scan.\
637 * - encoding: set by user\
638 * - decoding: set by lavc\
639 */\
640 AVPanScan *pan_scan;\
641 \
642 /**\
643 * tell user application that palette has changed from previous frame.\
644 * - encoding: ??? (no palette-enabled encoder yet)\
645 * - decoding: set by lavc (default 0)\
646 */\
647 int palette_has_changed;\
648 \
649 /**\
650 * Codec suggestion on buffer type if != 0\
651 * - encoding: unused\
652 * - decoding: set by lavc (before get_buffer() call))\
653 */\
654 int buffer_hints;\
655 \
656 /**\
657 * DCT coeffitients\
658 * - encoding: unused\
659 * - decoding: set by lavc\
660 */\
661 short *dct_coeff;\
662 \
663 /**\
664 * Motion referece frame index\
665 * - encoding: set by user\
666 * - decoding: set by lavc\
667 */\
668 int8_t *ref_index[2];
669
670 #define FF_QSCALE_TYPE_MPEG1 0
671 #define FF_QSCALE_TYPE_MPEG2 1
672 #define FF_QSCALE_TYPE_H264 2
673
674 #define FF_BUFFER_TYPE_INTERNAL 1
675 #define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
676 #define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewhere else, don't dealloc image (data/base), all other tables are not shared
677 #define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, don't dealloc anything
678
679
680 #define FF_I_TYPE 1 // Intra
681 #define FF_P_TYPE 2 // Predicted
682 #define FF_B_TYPE 3 // Bi-dir predicted
683 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
684 #define FF_SI_TYPE 5
685 #define FF_SP_TYPE 6
686
687 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore)
688 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
689 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
690 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
691
692 /**
693 * Audio Video Frame.
694 */
695 typedef struct AVFrame {
696 FF_COMMON_FRAME
697 } AVFrame;
698
699 #define DEFAULT_FRAME_RATE_BASE 1001000
700
701 /**
702 * main external api structure.
703 */
704 typedef struct AVCodecContext {
705 /**
706 * Info on struct for av_log
707 * - set by avcodec_alloc_context
708 */
709 AVClass *av_class;
710 /**
711 * the average bitrate.
712 * - encoding: set by user. unused for constant quantizer encoding
713 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
714 */
715 int bit_rate;
716
717 /**
718 * number of bits the bitstream is allowed to diverge from the reference.
719 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
720 * - encoding: set by user. unused for constant quantizer encoding
721 * - decoding: unused
722 */
723 int bit_rate_tolerance;
724
725 /**
726 * CODEC_FLAG_*.
727 * - encoding: set by user.
728 * - decoding: set by user.
729 */
730 int flags;
731
732 /**
733 * some codecs needs additionnal format info. It is stored here
734 * - encoding: set by user.
735 * - decoding: set by lavc. (FIXME is this ok?)
736 */
737 int sub_id;
738
739 /**
740 * motion estimation algorithm used for video coding.
741 * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
742 * 8 (umh), 9 (iter) [7, 8 are x264 specific, 9 is snow specific]
743 * - encoding: MUST be set by user.
744 * - decoding: unused
745 */
746 int me_method;
747
748 /**
749 * some codecs need / can use extra-data like huffman tables.
750 * mjpeg: huffman tables
751 * rv10: additional flags
752 * mpeg4: global headers (they can be in the bitstream or here)
753 * the allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
754 * then extradata_size to avoid prolems if its read with the bitstream reader
755 * the bytewise contents of extradata must not depend on the architecture or cpu endianness
756 * - encoding: set/allocated/freed by lavc.
757 * - decoding: set/allocated/freed by user.
758 */
759 uint8_t *extradata;
760 int extradata_size;
761
762 /**
763 * this is the fundamental unit of time (in seconds) in terms
764 * of which frame timestamps are represented. for fixed-fps content,
765 * timebase should be 1/framerate and timestamp increments should be
766 * identically 1.
767 * - encoding: MUST be set by user
768 * - decoding: set by lavc.
769 */
770 AVRational time_base;
771
772 /* video only */
773 /**
774 * picture width / height.
775 * - encoding: MUST be set by user.
776 * - decoding: set by lavc.
777 * Note, for compatibility its possible to set this instead of
778 * coded_width/height before decoding
779 */
780 int width, height;
781
782 #define FF_ASPECT_EXTENDED 15
783
784 /**
785 * the number of pictures in a group of pitures, or 0 for intra_only.
786 * - encoding: set by user.
787 * - decoding: unused
788 */
789 int gop_size;
790
791 /**
792 * pixel format, see PIX_FMT_xxx.
793 * - encoding: set by user.
794 * - decoding: set by lavc.
795 */
796 enum PixelFormat pix_fmt;
797
798 /**
799 * Frame rate emulation. If not zero lower layer (i.e. format handler)
800 * has to read frames at native frame rate.
801 * - encoding: set by user.
802 * - decoding: unused.
803 */
804 int rate_emu;
805
806 /**
807 * if non NULL, 'draw_horiz_band' is called by the libavcodec
808 * decoder to draw an horizontal band. It improve cache usage. Not
809 * all codecs can do that. You must check the codec capabilities
810 * before
811 * - encoding: unused
812 * - decoding: set by user.
813 * @param height the height of the slice
814 * @param y the y position of the slice
815 * @param type 1->top field, 2->bottom field, 3->frame
816 * @param offset offset into the AVFrame.data from which the slice should be read
817 */
818 void (*draw_horiz_band)(struct AVCodecContext *s,
819 const AVFrame *src, int offset[4],
820 int y, int type, int height);
821
822 /* audio only */
823 int sample_rate; ///< samples per sec
824 int channels;
825
826 /**
827 * audio sample format.
828 * - encoding: set by user.
829 * - decoding: set by lavc.
830 */
831 enum SampleFormat sample_fmt; ///< sample format, currenly unused
832
833 /* the following data should not be initialized */
834 /**
835 * samples per packet. initialized when calling 'init'
836 */
837 int frame_size;
838 int frame_number; ///< audio or video frame number
839 int real_pict_num; ///< returns the real picture number of previous encoded frame
840
841 /**
842 * number of frames the decoded output will be delayed relative to
843 * the encoded input.
844 * - encoding: set by lavc.
845 * - decoding: unused
846 */
847 int delay;
848
849 /* - encoding parameters */
850 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
851 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
852
853 /**
854 * minimum quantizer.
855 * - encoding: set by user.
856 * - decoding: unused
857 */
858 int qmin;
859
860 /**
861 * maximum quantizer.
862 * - encoding: set by user.
863 * - decoding: unused
864 */
865 int qmax;
866
867 /**
868 * maximum quantizer difference etween frames.
869 * - encoding: set by user.
870 * - decoding: unused
871 */
872 int max_qdiff;
873
874 /**
875 * maximum number of b frames between non b frames.
876 * note: the output will be delayed by max_b_frames+1 relative to the input
877 * - encoding: set by user.
878 * - decoding: unused
879 */
880 int max_b_frames;
881
882 /**
883 * qscale factor between ip and b frames.
884 * - encoding: set by user.
885 * - decoding: unused
886 */
887 float b_quant_factor;
888
889 /** obsolete FIXME remove */
890 int rc_strategy;
891 #define FF_RC_STRATEGY_XVID 1
892
893 int b_frame_strategy;
894
895 /**
896 * hurry up amount.
897 * deprecated in favor of skip_idct and skip_frame
898 * - encoding: unused
899 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
900 */
901 int hurry_up;
902
903 struct AVCodec *codec;
904
905 void *priv_data;
906
907 /* unused, FIXME remove*/
908 int rtp_mode;
909
910 int rtp_payload_size; /* The size of the RTP payload: the coder will */
911 /* do it's best to deliver a chunk with size */
912 /* below rtp_payload_size, the chunk will start */
913 /* with a start code on some codecs like H.263 */
914 /* This doesn't take account of any particular */
915 /* headers inside the transmited RTP payload */
916
917
918 /* The RTP callback: This function is called */
919 /* every time the encoder has a packet to send */
920 /* Depends on the encoder if the data starts */
921 /* with a Start Code (it should) H.263 does. */
922 /* mb_nb contains the number of macroblocks */
923 /* encoded in the RTP payload */
924 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
925
926 /* statistics, used for 2-pass encoding */
927 int mv_bits;
928 int header_bits;
929 int i_tex_bits;
930 int p_tex_bits;
931 int i_count;
932 int p_count;
933 int skip_count;
934 int misc_bits;
935
936 /**
937 * number of bits used for the previously encoded frame.
938 * - encoding: set by lavc
939 * - decoding: unused
940 */
941 int frame_bits;
942
943 /**
944 * private data of the user, can be used to carry app specific stuff.
945 * - encoding: set by user
946 * - decoding: set by user
947 */
948 void *opaque;
949
950 char codec_name[32];
951 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
952 enum CodecID codec_id; /* see CODEC_ID_xxx */
953
954 /**
955 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
956 * this is used to workaround some encoder bugs
957 * - encoding: set by user, if not then the default based on codec_id will be used
958 * - decoding: set by user, will be converted to upper case by lavc during init
959 */
960 unsigned int codec_tag;
961
962 /**
963 * workaround bugs in encoders which sometimes cannot be detected automatically.
964 * - encoding: set by user
965 * - decoding: set by user
966 */
967 int workaround_bugs;
968 #define FF_BUG_AUTODETECT 1 ///< autodetection
969 #define FF_BUG_OLD_MSMPEG4 2
970 #define FF_BUG_XVID_ILACE 4
971 #define FF_BUG_UMP4 8
972 #define FF_BUG_NO_PADDING 16
973 #define FF_BUG_AMV 32
974 #define FF_BUG_AC_VLC 0 ///< will be removed, libavcodec can now handle these non compliant files by default
975 #define FF_BUG_QPEL_CHROMA 64
976 #define FF_BUG_STD_QPEL 128
977 #define FF_BUG_QPEL_CHROMA2 256
978 #define FF_BUG_DIRECT_BLOCKSIZE 512
979 #define FF_BUG_EDGE 1024
980 #define FF_BUG_HPEL_CHROMA 2048
981 #define FF_BUG_DC_CLIP 4096
982 #define FF_BUG_MS 8192 ///< workaround various bugs in microsofts broken decoders
983 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
984
985 /**
986 * luma single coeff elimination threshold.
987 * - encoding: set by user
988 * - decoding: unused
989 */
990 int luma_elim_threshold;
991
992 /**
993 * chroma single coeff elimination threshold.
994 * - encoding: set by user
995 * - decoding: unused
996 */
997 int chroma_elim_threshold;
998
999 /**
1000 * strictly follow the std (MPEG4, ...).
1001 * - encoding: set by user
1002 * - decoding: unused
1003 */
1004 int strict_std_compliance;
1005 #define FF_COMPLIANCE_VERY_STRICT 2 ///< strictly conform to a older more strict version of the spec or reference software
1006 #define FF_COMPLIANCE_STRICT 1 ///< strictly conform to all the things in the spec no matter what consequences
1007 #define FF_COMPLIANCE_NORMAL 0
1008 #define FF_COMPLIANCE_INOFFICIAL -1 ///< allow inofficial extensions
1009 #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< allow non standarized experimental things
1010
1011 /**
1012 * qscale offset between ip and b frames.
1013 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1014 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1015 * - encoding: set by user.
1016 * - decoding: unused
1017 */
1018 float b_quant_offset;
1019
1020 /**
1021 * error resilience higher values will detect more errors but may missdetect
1022 * some more or less valid parts as errors.
1023 * - encoding: unused
1024 * - decoding: set by user
1025 */
1026 int error_resilience;
1027 #define FF_ER_CAREFUL 1
1028 #define FF_ER_COMPLIANT 2
1029 #define FF_ER_AGGRESSIVE 3
1030 #define FF_ER_VERY_AGGRESSIVE 4
1031
1032 /**
1033 * called at the beginning of each frame to get a buffer for it.
1034 * if pic.reference is set then the frame will be read later by lavc
1035 * avcodec_align_dimensions() should be used to find the required width and
1036 * height, as they normally need to be rounded up to the next multiple of 16
1037 * - encoding: unused
1038 * - decoding: set by lavc, user can override
1039 */
1040 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1041
1042 /**
1043 * called to release buffers which where allocated with get_buffer.
1044 * a released buffer can be reused in get_buffer()
1045 * pic.data[*] must be set to NULL
1046 * - encoding: unused
1047 * - decoding: set by lavc, user can override
1048 */
1049 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1050
1051 /**
1052 * if 1 the stream has a 1 frame delay during decoding.
1053 * - encoding: set by lavc
1054 * - decoding: set by lavc
1055 */
1056 int has_b_frames;
1057
1058 /**
1059 * number of bytes per packet if constant and known or 0
1060 * used by some WAV based audio codecs
1061 */
1062 int block_align;
1063
1064 int parse_only; /* - decoding only: if true, only parsing is done
1065 (function avcodec_parse_frame()). The frame
1066 data is returned. Only MPEG codecs support this now. */
1067
1068 /**
1069 * 0-> h263 quant 1-> mpeg quant.
1070 * - encoding: set by user.
1071 * - decoding: unused
1072 */
1073 int mpeg_quant;
1074
1075 /**
1076 * pass1 encoding statistics output buffer.
1077 * - encoding: set by lavc
1078 * - decoding: unused
1079 */
1080 char *stats_out;
1081
1082 /**
1083 * pass2 encoding statistics input buffer.
1084 * concatenated stuff from stats_out of pass1 should be placed here
1085 * - encoding: allocated/set/freed by user
1086 * - decoding: unused
1087 */
1088 char *stats_in;
1089
1090 /**
1091 * ratecontrol qmin qmax limiting method.
1092 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
1093 * - encoding: set by user.
1094 * - decoding: unused
1095 */
1096 float rc_qsquish;
1097
1098 float rc_qmod_amp;
1099 int rc_qmod_freq;
1100
1101 /**
1102 * ratecontrol override, see RcOverride.
1103 * - encoding: allocated/set/freed by user.
1104 * - decoding: unused
1105 */
1106 RcOverride *rc_override;
1107 int rc_override_count;
1108
1109 /**
1110 * rate control equation.
1111 * - encoding: set by user
1112 * - decoding: unused
1113 */
1114 char *rc_eq;
1115
1116 /**
1117 * maximum bitrate.
1118 * - encoding: set by user.
1119 * - decoding: unused
1120 */
1121 int rc_max_rate;
1122
1123 /**
1124 * minimum bitrate.
1125 * - encoding: set by user.
1126 * - decoding: unused
1127 */
1128 int rc_min_rate;
1129
1130 /**
1131 * decoder bitstream buffer size.
1132 * - encoding: set by user.
1133 * - decoding: unused
1134 */
1135 int rc_buffer_size;
1136 float rc_buffer_aggressivity;
1137
1138 /**
1139 * qscale factor between p and i frames.
1140 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1141 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1142 * - encoding: set by user.
1143 * - decoding: unused
1144 */
1145 float i_quant_factor;
1146
1147 /**
1148 * qscale offset between p and i frames.
1149 * - encoding: set by user.
1150 * - decoding: unused
1151 */
1152 float i_quant_offset;
1153
1154 /**
1155 * initial complexity for pass1 ratecontrol.
1156 * - encoding: set by user.
1157 * - decoding: unused
1158 */
1159 float rc_initial_cplx;
1160
1161 /**
1162 * dct algorithm, see FF_DCT_* below.
1163 * - encoding: set by user
1164 * - decoding: unused
1165 */
1166 int dct_algo;
1167 #define FF_DCT_AUTO 0
1168 #define FF_DCT_FASTINT 1
1169 #define FF_DCT_INT 2
1170 #define FF_DCT_MMX 3
1171 #define FF_DCT_MLIB 4
1172 #define FF_DCT_ALTIVEC 5
1173 #define FF_DCT_FAAN 6
1174
1175 /**
1176 * luminance masking (0-> disabled).
1177 * - encoding: set by user
1178 * - decoding: unused
1179 */
1180 float lumi_masking;
1181
1182 /**
1183 * temporary complexity masking (0-> disabled).
1184 * - encoding: set by user
1185 * - decoding: unused
1186 */
1187 float temporal_cplx_masking;
1188
1189 /**
1190 * spatial complexity masking (0-> disabled).
1191 * - encoding: set by user
1192 * - decoding: unused
1193 */
1194 float spatial_cplx_masking;
1195
1196 /**
1197 * p block masking (0-> disabled).
1198 * - encoding: set by user
1199 * - decoding: unused
1200 */
1201 float p_masking;
1202
1203 /**
1204 * darkness masking (0-> disabled).
1205 * - encoding: set by user
1206 * - decoding: unused
1207 */
1208 float dark_masking;
1209
1210
1211 /* for binary compatibility */
1212 int unused;
1213
1214 /**
1215 * idct algorithm, see FF_IDCT_* below.
1216 * - encoding: set by user
1217 * - decoding: set by user
1218 */
1219 int idct_algo;
1220 #define FF_IDCT_AUTO 0
1221 #define FF_IDCT_INT 1
1222 #define FF_IDCT_SIMPLE 2
1223 #define FF_IDCT_SIMPLEMMX 3
1224 #define FF_IDCT_LIBMPEG2MMX 4
1225 #define FF_IDCT_PS2 5
1226 #define FF_IDCT_MLIB 6
1227 #define FF_IDCT_ARM 7
1228 #define FF_IDCT_ALTIVEC 8
1229 #define FF_IDCT_SH4 9
1230 #define FF_IDCT_SIMPLEARM 10
1231 #define FF_IDCT_H264 11
1232 #define FF_IDCT_VP3 12
1233 #define FF_IDCT_IPP 13
1234 #define FF_IDCT_XVIDMMX 14
1235 #define FF_IDCT_CAVS 15
1236 #define FF_IDCT_SIMPLEARMV5TE 16
1237
1238 /**
1239 * slice count.
1240 * - encoding: set by lavc
1241 * - decoding: set by user (or 0)
1242 */
1243 int slice_count;
1244 /**
1245 * slice offsets in the frame in bytes.
1246 * - encoding: set/allocated by lavc
1247 * - decoding: set/allocated by user (or NULL)
1248 */
1249 int *slice_offset;
1250
1251 /**
1252 * error concealment flags.
1253 * - encoding: unused
1254 * - decoding: set by user
1255 */
1256 int error_concealment;
1257 #define FF_EC_GUESS_MVS 1
1258 #define FF_EC_DEBLOCK 2
1259
1260 /**
1261 * dsp_mask could be add used to disable unwanted CPU features
1262 * CPU features (i.e. MMX, SSE. ...)
1263 *
1264 * with FORCE flag you may instead enable given CPU features
1265 * (Dangerous: usable in case of misdetection, improper usage however will
1266 * result into program crash)
1267 */
1268 unsigned dsp_mask;
1269 #define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
1270 /* lower 16 bits - CPU features */
1271 #ifdef HAVE_MMX
1272 #define FF_MM_MMX 0x0001 /* standard MMX */
1273 #define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
1274 #define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
1275 #define FF_MM_SSE 0x0008 /* SSE functions */
1276 #define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
1277 #define FF_MM_3DNOWEXT 0x0020 /* AMD 3DNowExt */
1278 #endif /* HAVE_MMX */
1279 #ifdef HAVE_IWMMXT
1280 #define FF_MM_IWMMXT 0x0100 /* XScale IWMMXT */
1281 #endif /* HAVE_IWMMXT */
1282
1283 /**
1284 * bits per sample/pixel from the demuxer (needed for huffyuv).
1285 * - encoding: set by lavc
1286 * - decoding: set by user
1287 */
1288 int bits_per_sample;
1289
1290 /**
1291 * prediction method (needed for huffyuv).
1292 * - encoding: set by user
1293 * - decoding: unused
1294 */
1295 int prediction_method;
1296 #define FF_PRED_LEFT 0
1297 #define FF_PRED_PLANE 1
1298 #define FF_PRED_MEDIAN 2
1299
1300 /**
1301 * sample aspect ratio (0 if unknown).
1302 * numerator and denominator must be relative prime and smaller then 256 for some video standards
1303 * - encoding: set by user.
1304 * - decoding: set by lavc.
1305 */
1306 AVRational sample_aspect_ratio;
1307
1308 /**
1309 * the picture in the bitstream.
1310 * - encoding: set by lavc
1311 * - decoding: set by lavc
1312 */
1313 AVFrame *coded_frame;
1314
1315 /**
1316 * debug.
1317 * - encoding: set by user.
1318 * - decoding: set by user.
1319 */
1320 int debug;
1321 #define FF_DEBUG_PICT_INFO 1
1322 #define FF_DEBUG_RC 2
1323 #define FF_DEBUG_BITSTREAM 4
1324 #define FF_DEBUG_MB_TYPE 8
1325 #define FF_DEBUG_QP 16
1326 #define FF_DEBUG_MV 32
1327 #define FF_DEBUG_DCT_COEFF 0x00000040
1328 #define FF_DEBUG_SKIP 0x00000080
1329 #define FF_DEBUG_STARTCODE 0x00000100
1330 #define FF_DEBUG_PTS 0x00000200
1331 #define FF_DEBUG_ER 0x00000400
1332 #define FF_DEBUG_MMCO 0x00000800
1333 #define FF_DEBUG_BUGS 0x00001000
1334 #define FF_DEBUG_VIS_QP 0x00002000
1335 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1336
1337 /**
1338 * debug.
1339 * - encoding: set by user.
1340 * - decoding: set by user.
1341 */
1342 int debug_mv;
1343 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1344 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1345 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1346
1347 /**
1348 * error.
1349 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1350 * - decoding: unused
1351 */
1352 uint64_t error[4];
1353
1354 /**
1355 * minimum MB quantizer.
1356 * - encoding: unused
1357 * - decoding: unused
1358 */
1359 int mb_qmin;
1360
1361 /**
1362 * maximum MB quantizer.
1363 * - encoding: unused
1364 * - decoding: unused
1365 */
1366 int mb_qmax;
1367
1368 /**
1369 * motion estimation compare function.
1370 * - encoding: set by user.
1371 * - decoding: unused
1372 */
1373 int me_cmp;
1374 /**
1375 * subpixel motion estimation compare function.
1376 * - encoding: set by user.
1377 * - decoding: unused
1378 */
1379 int me_sub_cmp;
1380 /**
1381 * macroblock compare function (not supported yet).
1382 * - encoding: set by user.
1383 * - decoding: unused
1384 */
1385 int mb_cmp;
1386 /**
1387 * interlaced dct compare function
1388 * - encoding: set by user.
1389 * - decoding: unused
1390 */
1391 int ildct_cmp;
1392 #define FF_CMP_SAD 0
1393 #define FF_CMP_SSE 1
1394 #define FF_CMP_SATD 2
1395 #define FF_CMP_DCT 3
1396 #define FF_CMP_PSNR 4
1397 #define FF_CMP_BIT 5
1398 #define FF_CMP_RD 6
1399 #define FF_CMP_ZERO 7
1400 #define FF_CMP_VSAD 8
1401 #define FF_CMP_VSSE 9
1402 #define FF_CMP_NSSE 10
1403 #define FF_CMP_W53 11
1404 #define FF_CMP_W97 12
1405 #define FF_CMP_DCTMAX 13
1406 #define FF_CMP_DCT264 14
1407 #define FF_CMP_CHROMA 256
1408
1409 /**
1410 * ME diamond size & shape.
1411 * - encoding: set by user.
1412 * - decoding: unused
1413 */
1414 int dia_size;
1415
1416 /**
1417 * amount of previous MV predictors (2a+1 x 2a+1 square).
1418 * - encoding: set by user.
1419 * - decoding: unused
1420 */
1421 int last_predictor_count;
1422
1423 /**
1424 * pre pass for motion estimation.
1425 * - encoding: set by user.
1426 * - decoding: unused
1427 */
1428 int pre_me;
1429
1430 /**
1431 * motion estimation pre pass compare function.
1432 * - encoding: set by user.
1433 * - decoding: unused
1434 */
1435 int me_pre_cmp;
1436
1437 /**
1438 * ME pre pass diamond size & shape.
1439 * - encoding: set by user.
1440 * - decoding: unused
1441 */
1442 int pre_dia_size;
1443
1444 /**
1445 * subpel ME quality.
1446 * - encoding: set by user.
1447 * - decoding: unused
1448 */
1449 int me_subpel_quality;
1450
1451 /**
1452 * callback to negotiate the pixelFormat.
1453 * @param fmt is the list of formats which are supported by the codec,
1454 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1455 * the first is allways the native one
1456 * @return the choosen format
1457 * - encoding: unused
1458 * - decoding: set by user, if not set then the native format will always be choosen
1459 */
1460 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1461
1462 /**
1463 * DTG active format information (additionnal aspect ratio
1464 * information only used in DVB MPEG2 transport streams). 0 if
1465 * not set.
1466 *
1467 * - encoding: unused.
1468 * - decoding: set by decoder
1469 */
1470 int dtg_active_format;
1471 #define FF_DTG_AFD_SAME 8
1472 #define FF_DTG_AFD_4_3 9
1473 #define FF_DTG_AFD_16_9 10
1474 #define FF_DTG_AFD_14_9 11
1475 #define FF_DTG_AFD_4_3_SP_14_9 13
1476 #define FF_DTG_AFD_16_9_SP_14_9 14
1477 #define FF_DTG_AFD_SP_4_3 15
1478
1479 /**
1480 * Maximum motion estimation search range in subpel units.
1481 * if 0 then no limit
1482 *
1483 * - encoding: set by user.
1484 * - decoding: unused.
1485 */
1486 int me_range;
1487
1488 /**
1489 * intra quantizer bias.
1490 * - encoding: set by user.
1491 * - decoding: unused
1492 */
1493 int intra_quant_bias;
1494 #define FF_DEFAULT_QUANT_BIAS 999999
1495
1496 /**
1497 * inter quantizer bias.
1498 * - encoding: set by user.
1499 * - decoding: unused
1500 */
1501 int inter_quant_bias;
1502
1503 /**
1504 * color table ID.
1505 * - encoding: unused.
1506 * - decoding: which clrtable should be used for 8bit RGB images
1507 * table have to be stored somewhere FIXME
1508 */
1509 int color_table_id;
1510
1511 /**
1512 * internal_buffer count.
1513 * Don't touch, used by lavc default_get_buffer()
1514 */
1515 int internal_buffer_count;
1516
1517 /**
1518 * internal_buffers.
1519 * Don't touch, used by lavc default_get_buffer()
1520 */
1521 void *internal_buffer;
1522
1523 #define FF_LAMBDA_SHIFT 7
1524 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1525 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1526 #define FF_LAMBDA_MAX (256*128-1)
1527
1528 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1529 /**
1530 * global quality for codecs which cannot change it per frame.
1531 * this should be proportional to MPEG1/2/4 qscale.
1532 * - encoding: set by user.
1533 * - decoding: unused
1534 */
1535 int global_quality;
1536
1537 #define FF_CODER_TYPE_VLC 0
1538 #define FF_CODER_TYPE_AC 1
1539 /**
1540 * coder type
1541 * - encoding: set by user.
1542 * - decoding: unused
1543 */
1544 int coder_type;
1545
1546 /**
1547 * context model
1548 * - encoding: set by user.
1549 * - decoding: unused
1550 */
1551 int context_model;
1552 #if 0
1553 /**
1554 *
1555 * - encoding: unused
1556 * - decoding: set by user.
1557 */
1558 uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1559 #endif
1560
1561 /**
1562 * slice flags
1563 * - encoding: unused
1564 * - decoding: set by user.
1565 */
1566 int slice_flags;
1567 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1568 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1569 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1570
1571 /**
1572 * XVideo Motion Acceleration
1573 * - encoding: forbidden
1574 * - decoding: set by decoder
1575 */
1576 int xvmc_acceleration;
1577
1578 /**
1579 * macroblock decision mode
1580 * - encoding: set by user.
1581 * - decoding: unused
1582 */
1583 int mb_decision;
1584 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1585 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1586 #define FF_MB_DECISION_RD 2 ///< rate distoration
1587
1588 /**
1589 * custom intra quantization matrix
1590 * - encoding: set by user, can be NULL
1591 * - decoding: set by lavc
1592 */
1593 uint16_t *intra_matrix;
1594
1595 /**
1596 * custom inter quantization matrix
1597 * - encoding: set by user, can be NULL
1598 * - decoding: set by lavc
1599 */
1600 uint16_t *inter_matrix;
1601
1602 /**
1603 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1604 * this is used to workaround some encoder bugs
1605 * - encoding: unused
1606 * - decoding: set by user, will be converted to upper case by lavc during init
1607 */
1608 unsigned int stream_codec_tag;
1609
1610 /**
1611 * scene change detection threshold.
1612 * 0 is default, larger means fewer detected scene changes
1613 * - encoding: set by user.
1614 * - decoding: unused
1615 */
1616 int scenechange_threshold;
1617
1618 /**
1619 * minimum lagrange multipler
1620 * - encoding: set by user.
1621 * - decoding: unused
1622 */
1623 int lmin;
1624
1625 /**
1626 * maximum lagrange multipler
1627 * - encoding: set by user.
1628 * - decoding: unused
1629 */
1630 int lmax;
1631
1632 /**
1633 * Palette control structure
1634 * - encoding: ??? (no palette-enabled encoder yet)
1635 * - decoding: set by user.
1636 */
1637 struct AVPaletteControl *palctrl;
1638
1639 /**
1640 * noise reduction strength
1641 * - encoding: set by user.
1642 * - decoding: unused
1643 */
1644 int noise_reduction;
1645
1646 /**
1647 * called at the beginning of a frame to get cr buffer for it.
1648 * buffer type (size, hints) must be the same. lavc won't check it.
1649 * lavc will pass previous buffer in pic, function should return
1650 * same buffer or new buffer with old frame "painted" into it.
1651 * if pic.data[0] == NULL must behave like get_buffer().
1652 * - encoding: unused
1653 * - decoding: set by lavc, user can override
1654 */
1655 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1656
1657 /**
1658 * number of bits which should be loaded into the rc buffer before decoding starts
1659 * - encoding: set by user.
1660 * - decoding: unused
1661 */
1662 int rc_initial_buffer_occupancy;
1663
1664 /**
1665 *
1666 * - encoding: set by user.
1667 * - decoding: unused
1668 */
1669 int inter_threshold;
1670
1671 /**
1672 * CODEC_FLAG2_*.
1673 * - encoding: set by user.
1674 * - decoding: set by user.
1675 */
1676 int flags2;
1677
1678 /**
1679 * simulates errors in the bitstream to test error concealment.
1680 * - encoding: set by user.
1681 * - decoding: unused.
1682 */
1683 int error_rate;
1684
1685 /**
1686 * MP3 antialias algorithm, see FF_AA_* below.
1687 * - encoding: unused
1688 * - decoding: set by user
1689 */
1690 int antialias_algo;
1691 #define FF_AA_AUTO 0
1692 #define FF_AA_FASTINT 1 //not implemented yet
1693 #define FF_AA_INT 2
1694 #define FF_AA_FLOAT 3
1695 /**
1696 * Quantizer noise shaping.
1697 * - encoding: set by user
1698 * - decoding: unused
1699 */
1700 int quantizer_noise_shaping;
1701
1702 /**
1703 * Thread count.
1704 * is used to decide how many independant tasks should be passed to execute()
1705 * - encoding: set by user
1706 * - decoding: set by user
1707 */
1708 int thread_count;
1709
1710 /**
1711 * the codec may call this to execute several independant things. it will return only after
1712 * finishing all tasks, the user may replace this with some multithreaded implementation, the
1713 * default implementation will execute the parts serially
1714 * @param count the number of things to execute
1715 * - encoding: set by lavc, user can override
1716 * - decoding: set by lavc, user can override
1717 */
1718 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1719
1720 /**
1721 * Thread opaque.
1722 * can be used by execute() to store some per AVCodecContext stuff.
1723 * - encoding: set by execute()
1724 * - decoding: set by execute()
1725 */
1726 void *thread_opaque;
1727
1728 /**
1729 * Motion estimation threshold. under which no motion estimation is
1730 * performed, but instead the user specified motion vectors are used
1731 *
1732 * - encoding: set by user
1733 * - decoding: unused
1734 */
1735 int me_threshold;
1736
1737 /**
1738 * Macroblock threshold. under which the user specified macroblock types will be used
1739 * - encoding: set by user
1740 * - decoding: unused
1741 */
1742 int mb_threshold;
1743
1744 /**
1745 * precision of the intra dc coefficient - 8.
1746 * - encoding: set by user
1747 * - decoding: unused
1748 */
1749 int intra_dc_precision;
1750
1751 /**
1752 * noise vs. sse weight for the nsse comparsion function.
1753 * - encoding: set by user
1754 * - decoding: unused
1755 */
1756 int nsse_weight;
1757
1758 /**
1759 * number of macroblock rows at the top which are skipped.
1760 * - encoding: unused
1761 * - decoding: set by user
1762 */
1763 int skip_top;
1764
1765 /**
1766 * number of macroblock rows at the bottom which are skipped.
1767 * - encoding: unused
1768 * - decoding: set by user
1769 */
1770 int skip_bottom;
1771
1772 /**
1773 * profile
1774 * - encoding: set by user
1775 * - decoding: set by lavc
1776 */
1777 int profile;
1778 #define FF_PROFILE_UNKNOWN -99
1779
1780 /**
1781 * level
1782 * - encoding: set by user
1783 * - decoding: set by lavc
1784 */
1785 int level;
1786 #define FF_LEVEL_UNKNOWN -99
1787
1788 /**
1789 * low resolution decoding. 1-> 1/2 size, 2->1/4 size
1790 * - encoding: unused
1791 * - decoding: set by user
1792 */
1793 int lowres;
1794
1795 /**
1796 * bitsream width / height. may be different from width/height if lowres
1797 * or other things are used
1798 * - encoding: unused
1799 * - decoding: set by user before init if known, codec should override / dynamically change if needed
1800 */
1801 int coded_width, coded_height;
1802
1803 /**
1804 * frame skip threshold
1805 * - encoding: set by user
1806 * - decoding: unused
1807 */
1808 int frame_skip_threshold;
1809
1810 /**
1811 * frame skip factor
1812 * - encoding: set by user
1813 * - decoding: unused
1814 */
1815 int frame_skip_factor;
1816
1817 /**
1818 * frame skip exponent
1819 * - encoding: set by user
1820 * - decoding: unused
1821 */
1822 int frame_skip_exp;
1823
1824 /**
1825 * frame skip comparission function
1826 * - encoding: set by user.
1827 * - decoding: unused
1828 */
1829 int frame_skip_cmp;
1830
1831 /**
1832 * border processing masking. raises the quantizer for mbs on the borders
1833 * of the picture.
1834 * - encoding: set by user
1835 * - decoding: unused
1836 */
1837 float border_masking;
1838
1839 /**
1840 * minimum MB lagrange multipler.
1841 * - encoding: set by user.
1842 * - decoding: unused
1843 */
1844 int mb_lmin;
1845
1846 /**
1847 * maximum MB lagrange multipler.
1848 * - encoding: set by user.
1849 * - decoding: unused
1850 */
1851 int mb_lmax;
1852
1853 /**
1854 *
1855 * - encoding: set by user.
1856 * - decoding: unused
1857 */
1858 int me_penalty_compensation;
1859
1860 /**
1861 *
1862 * - encoding: unused
1863 * - decoding: set by user.
1864 */
1865 enum AVDiscard skip_loop_filter;
1866
1867 /**
1868 *
1869 * - encoding: unused
1870 * - decoding: set by user.
1871 */
1872 enum AVDiscard skip_idct;
1873
1874 /**
1875 *
1876 * - encoding: unused
1877 * - decoding: set by user.
1878 */
1879 enum AVDiscard skip_frame;
1880
1881 /**
1882 *
1883 * - encoding: set by user.
1884 * - decoding: unused
1885 */
1886 int bidir_refine;
1887
1888 /**
1889 *
1890 * - encoding: set by user.
1891 * - decoding: unused
1892 */
1893 int brd_scale;
1894
1895 /**
1896 * constant rate factor - quality-based VBR - values ~correspond to qps
1897 * - encoding: set by user.
1898 * - decoding: unused
1899 */
1900 float crf;
1901
1902 /**
1903 * constant quantization parameter rate control method
1904 * - encoding: set by user.
1905 * - decoding: unused
1906 */
1907 int cqp;
1908
1909 /**
1910 * minimum gop size
1911 * - encoding: set by user.
1912 * - decoding: unused
1913 */
1914 int keyint_min;
1915
1916 /**
1917 * number of reference frames
1918 * - encoding: set by user.
1919 * - decoding: unused
1920 */
1921 int refs;
1922
1923 /**
1924 * chroma qp offset from luma
1925 * - encoding: set by user.
1926 * - decoding: unused
1927 */
1928 int chromaoffset;
1929
1930 /**
1931 * influences how often b-frames are used
1932 * - encoding: set by user.
1933 * - decoding: unused
1934 */
1935 int bframebias;
1936
1937 /**
1938 * trellis RD quantization
1939 * - encoding: set by user.
1940 * - decoding: unused
1941 */
1942 int trellis;
1943
1944 /**
1945 * reduce fluctuations in qp (before curve compression)
1946 * - encoding: set by user.
1947 * - decoding: unused
1948 */
1949 float complexityblur;
1950
1951 /**
1952 * in-loop deblocking filter alphac0 parameter
1953 * alpha is in the range -6...6
1954 * - encoding: set by user.
1955 * - decoding: unused
1956 */
1957 int deblockalpha;
1958
1959 /**
1960 * in-loop deblocking filter beta parameter
1961 * beta is in the range -6...6
1962 * - encoding: set by user.
1963 * - decoding: unused
1964 */
1965 int deblockbeta;
1966
1967 /**
1968 * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
1969 * - encoding: set by user.
1970 * - decoding: unused
1971 */
1972 int partitions;
1973 #define X264_PART_I4X4 0x001 /* Analyse i4x4 */
1974 #define X264_PART_I8X8 0x002 /* Analyse i8x8 (requires 8x8 transform) */
1975 #define X264_PART_P8X8 0x010 /* Analyse p16x8, p8x16 and p8x8 */
1976 #define X264_PART_P4X4 0x020 /* Analyse p8x4, p4x8, p4x4 */
1977 #define X264_PART_B8X8 0x100 /* Analyse b16x8, b8x16 and b8x8 */
1978
1979 /**
1980 * direct mv prediction mode - 0 (none), 1 (spatial), 2 (temporal)
1981 * - encoding: set by user.
1982 * - decoding: unused
1983 */
1984 int directpred;
1985
1986 /**
1987 * audio cutoff bandwidth (0 means "automatic") . Currently used only by FAAC
1988 * - encoding: set by user.
1989 * - decoding: unused
1990 */
1991 int cutoff;
1992
1993 /**
1994 * multiplied by qscale for each frame and added to scene_change_score
1995 * - encoding: set by user.
1996 * - decoding: unused
1997 */
1998 int scenechange_factor;
1999
2000 /**
2001 *
2002 * note: value depends upon the compare functin used for fullpel ME
2003 * - encoding: set by user.
2004 * - decoding: unused
2005 */
2006 int mv0_threshold;
2007
2008 /**
2009 * adjusts sensitivity of b_frame_strategy 1
2010 * - encoding: set by user.
2011 * - decoding: unused
2012 */
2013 int b_sensitivity;
2014
2015 /**
2016 * - encoding: set by user.
2017 * - decoding: unused
2018 */
2019 int compression_level;
2020 #define FF_COMPRESSION_DEFAULT -1
2021
2022 /**
2023 * sets whether to use LPC mode - used by FLAC encoder
2024 * - encoding: set by user.
2025 * - decoding: unused.
2026 */
2027 int use_lpc;
2028
2029 /**
2030 * LPC coefficient precision - used by FLAC encoder
2031 * - encoding: set by user.
2032 * - decoding: unused.
2033 */
2034 int lpc_coeff_precision;
2035
2036 /**
2037 * - encoding: set by user.
2038 * - decoding: unused.
2039 */
2040 int min_prediction_order;
2041
2042 /**
2043 * - encoding: set by user.
2044 * - decoding: unused.
2045 */
2046 int max_prediction_order;
2047
2048 /**
2049 * search method for selecting prediction order
2050 * - encoding: set by user.
2051 * - decoding: unused.
2052 */
2053 int prediction_order_method;
2054
2055 /**
2056 * - encoding: set by user.
2057 * - decoding: unused.
2058 */
2059 int min_partition_order;
2060
2061 /**
2062 * - encoding: set by user.
2063 * - decoding: unused.
2064 */
2065 int max_partition_order;
2066
2067 /**
2068 * GOP timecode frame start number, in non drop frame format
2069 * - encoding: set by user.
2070 * - decoding: unused.
2071 */
2072 int64_t timecode_frame_start;
2073 } AVCodecContext;
2074
2075 /**
2076 * AVCodec.
2077 */
2078 typedef struct AVCodec {
2079 const char *name;
2080 enum CodecType type;
2081 enum CodecID id;
2082 int priv_data_size;
2083 int (*init)(AVCodecContext *);
2084 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2085 int (*close)(AVCodecContext *);
2086 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
2087 uint8_t *buf, int buf_size);
2088 int capabilities;
2089 struct AVCodec *next;
2090 void (*flush)(AVCodecContext *);
2091 const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
2092 const enum PixelFormat *pix_fmts; ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
2093 } AVCodec;
2094
2095 /**
2096 * four components are given, that's all.
2097 * the last component is alpha
2098 */
2099 typedef struct AVPicture {
2100 uint8_t *data[4];
2101 int linesize[4]; ///< number of bytes per line
2102 } AVPicture;
2103
2104 /**
2105 * AVPaletteControl
2106 * This structure defines a method for communicating palette changes
2107 * between and demuxer and a decoder.
2108 * this is totally broken, palette changes should be sent as AVPackets
2109 */
2110 #define AVPALETTE_SIZE 1024
2111 #define AVPALETTE_COUNT 256
2112 typedef struct AVPaletteControl {
2113
2114 /* demuxer sets this to 1 to indicate the palette has changed;
2115 * decoder resets to 0 */
2116 int palette_changed;
2117
2118 /* 4-byte ARGB palette entries, stored in native byte order; note that
2119 * the individual palette components should be on a 8-bit scale; if
2120 * the palette data comes from a IBM VGA native format, the component
2121 * data is probably 6 bits in size and needs to be scaled */
2122 unsigned int palette[AVPALETTE_COUNT];
2123
2124 } AVPaletteControl attribute_deprecated;
2125
2126 typedef struct AVSubtitleRect {
2127 uint16_t x;
2128 uint16_t y;
2129 uint16_t w;
2130 uint16_t h;
2131 uint16_t nb_colors;
2132 int linesize;
2133 uint32_t *rgba_palette;
2134 uint8_t *bitmap;
2135 } AVSubtitleRect;
2136
2137 typedef struct AVSubtitle {
2138 uint16_t format; /* 0 = graphics */
2139 uint32_t start_display_time; /* relative to packet pts, in ms */
2140 uint32_t end_display_time; /* relative to packet pts, in ms */
2141 uint32_t num_rects;
2142 AVSubtitleRect *rects;
2143 } AVSubtitle;
2144
2145 extern AVCodec ac3_encoder;
2146 extern AVCodec amr_nb_encoder;
2147 extern AVCodec amr_wb_encoder;
2148 extern AVCodec asv1_encoder;
2149 extern AVCodec asv2_encoder;
2150 extern AVCodec dvvideo_encoder;
2151 extern AVCodec faac_encoder;
2152 extern AVCodec ffv1_encoder;
2153 extern AVCodec ffvhuff_encoder;
2154 extern AVCodec flac_encoder;
2155 extern AVCodec flashsv_encoder;
2156 extern AVCodec flv_encoder;
2157 extern AVCodec gif_encoder;
2158 extern AVCodec h261_encoder;
2159 extern AVCodec h263_encoder;
2160 extern AVCodec h263p_encoder;
2161 extern AVCodec h264_encoder;
2162 extern AVCodec huffyuv_encoder;
2163 extern AVCodec jpegls_encoder;
2164 extern AVCodec libgsm_encoder;
2165 extern AVCodec libtheora_encoder;
2166 extern AVCodec ljpeg_encoder;
2167 extern AVCodec mdec_encoder;
2168 extern AVCodec mjpeg_encoder;
2169 extern AVCodec mp2_encoder;
2170 extern AVCodec mp3lame_encoder;
2171 extern AVCodec mpeg1video_encoder;
2172 extern AVCodec mpeg2video_encoder;
2173 extern AVCodec mpeg4_encoder;
2174 extern AVCodec msmpeg4v1_encoder;
2175 extern AVCodec msmpeg4v2_encoder;
2176 extern AVCodec msmpeg4v3_encoder;
2177 extern AVCodec oggvorbis_encoder;
2178 extern AVCodec pam_encoder;
2179 extern AVCodec pbm_encoder;
2180 extern AVCodec pgm_encoder;
2181 extern AVCodec pgmyuv_encoder;
2182 extern AVCodec png_encoder;
2183 extern AVCodec ppm_encoder;
2184 extern AVCodec rv10_encoder;
2185 extern AVCodec rv20_encoder;
2186 extern AVCodec snow_encoder;
2187 extern AVCodec sonic_encoder;
2188 extern AVCodec sonic_ls_encoder;
2189 extern AVCodec svq1_encoder;
2190 extern AVCodec vcr1_encoder;
2191 extern AVCodec vorbis_encoder;
2192 extern AVCodec wmv1_encoder;
2193 extern AVCodec wmv2_encoder;
2194 extern AVCodec x264_encoder;
2195 extern AVCodec xvid_encoder;
2196 extern AVCodec zlib_encoder;
2197 extern AVCodec zmbv_encoder;
2198
2199 extern AVCodec aac_decoder;
2200 extern AVCodec aasc_decoder;
2201 extern AVCodec alac_decoder;
2202 extern AVCodec amr_nb_decoder;
2203 extern AVCodec amr_wb_decoder;
2204 extern AVCodec asv1_decoder;
2205 extern AVCodec asv2_decoder;
2206 extern AVCodec avs_decoder;
2207 extern AVCodec bmp_decoder;
2208 extern AVCodec cavs_decoder;
2209 extern AVCodec cinepak_decoder;
2210 extern AVCodec cljr_decoder;
2211 extern AVCodec cook_decoder;
2212 extern AVCodec cscd_decoder;
2213 extern AVCodec cyuv_decoder;
2214 extern AVCodec dsicinaudio_decoder;
2215 extern AVCodec dsicinvideo_decoder;
2216 extern AVCodec dvvideo_decoder;
2217 extern AVCodec eightbps_decoder;
2218 extern AVCodec ffv1_decoder;
2219 extern AVCodec ffvhuff_decoder;
2220 extern AVCodec flac_decoder;
2221 extern AVCodec flashsv_decoder;
2222 extern AVCodec flic_decoder;
2223 extern AVCodec flv_decoder;
2224 extern AVCodec fourxm_decoder;
2225 extern AVCodec fraps_decoder;
2226 extern AVCodec gif_decoder;
2227 extern AVCodec h261_decoder;
2228 extern AVCodec h263_decoder;
2229 extern AVCodec h263i_decoder;
2230 extern AVCodec h264_decoder;
2231 extern AVCodec huffyuv_decoder;
2232 extern AVCodec idcin_decoder;
2233 extern AVCodec imc_decoder;
2234 extern AVCodec indeo2_decoder;
2235 extern AVCodec indeo3_decoder;
2236 extern AVCodec interplay_dpcm_decoder;
2237 extern AVCodec interplay_video_decoder;
2238 extern AVCodec kmvc_decoder;
2239 extern AVCodec libgsm_decoder;
2240 extern AVCodec loco_decoder;
2241 extern AVCodec mace3_decoder;
2242 extern AVCodec mace6_decoder;
2243 extern AVCodec mdec_decoder;
2244 extern AVCodec mjpeg_decoder;
2245 extern AVCodec mjpegb_decoder;
2246 extern AVCodec mmvideo_decoder;
2247 extern AVCodec mp2_decoder;
2248 extern AVCodec mp3_decoder;
2249 extern AVCodec mp3adu_decoder;
2250 extern AVCodec mp3on4_decoder;
2251 extern AVCodec mpc7_decoder;
2252 extern AVCodec mpeg1video_decoder;
2253 extern AVCodec mpeg2video_decoder;
2254 extern AVCodec mpeg4_decoder;
2255 extern AVCodec mpeg4aac_decoder;
2256 extern AVCodec mpeg_xvmc_decoder;
2257 extern AVCodec mpegvideo_decoder;
2258 extern AVCodec msmpeg4v1_decoder;
2259 extern AVCodec msmpeg4v2_decoder;
2260 extern AVCodec msmpeg4v3_decoder;
2261 extern AVCodec msrle_decoder;
2262 extern AVCodec msvideo1_decoder;
2263 extern AVCodec mszh_decoder;
2264 extern AVCodec nuv_decoder;
2265 extern AVCodec oggvorbis_decoder;
2266 extern AVCodec png_decoder;
2267 extern AVCodec qdm2_decoder;
2268 extern AVCodec qdraw_decoder;
2269 extern AVCodec qpeg_decoder;
2270 extern AVCodec qtrle_decoder;
2271 extern AVCodec ra_144_decoder;
2272 extern AVCodec ra_288_decoder;
2273 extern AVCodec roq_decoder;
2274 extern AVCodec roq_dpcm_decoder;
2275 extern AVCodec rpza_decoder;
2276 extern AVCodec rv10_decoder;
2277 extern AVCodec rv20_decoder;
2278 extern AVCodec rv30_decoder;
2279 extern AVCodec rv40_decoder;
2280 extern AVCodec shorten_decoder;
2281 extern AVCodec smackaud_decoder;
2282 extern AVCodec smacker_decoder;
2283 extern AVCodec smc_decoder;
2284 extern AVCodec snow_decoder;
2285 extern AVCodec sol_dpcm_decoder;
2286 extern AVCodec sonic_decoder;
2287 extern AVCodec sp5x_decoder;
2288 extern AVCodec svq1_decoder;
2289 extern AVCodec svq3_decoder;
2290 extern AVCodec targa_decoder;
2291 extern AVCodec theora_decoder;
2292 extern AVCodec tiertexseqvideo_decoder;
2293 extern AVCodec tiff_decoder;
2294 extern AVCodec truemotion1_decoder;
2295 extern AVCodec truemotion2_decoder;
2296 extern AVCodec truespeech_decoder;
2297 extern AVCodec tscc_decoder;
2298 extern AVCodec tta_decoder;
2299 extern AVCodec ulti_decoder;
2300 extern AVCodec vc1_decoder;
2301 extern AVCodec vcr1_decoder;
2302 extern AVCodec vmdaudio_decoder;
2303 extern AVCodec vmdvideo_decoder;
2304 extern AVCodec vmnc_decoder;
2305 extern AVCodec vorbis_decoder;
2306 extern AVCodec vp3_decoder;
2307 extern AVCodec vp5_decoder;
2308 extern AVCodec vp6_decoder;
2309 extern AVCodec vp6f_decoder;
2310 extern AVCodec vqa_decoder;
2311 extern AVCodec wavpack_decoder;
2312 extern AVCodec wmav1_decoder;
2313 extern AVCodec wmav2_decoder;
2314 extern AVCodec wmv1_decoder;
2315 extern AVCodec wmv2_decoder;
2316 extern AVCodec wmv3_decoder;
2317 extern AVCodec wnv1_decoder;
2318 extern AVCodec ws_snd1_decoder;
2319 extern AVCodec xan_dpcm_decoder;
2320 extern AVCodec xan_wc3_decoder;
2321 extern AVCodec xl_decoder;
2322 extern AVCodec zlib_decoder;
2323 extern AVCodec zmbv_decoder;
2324
2325 /* pcm codecs */
2326 #define PCM_CODEC(id, name) \
2327 extern AVCodec name ## _decoder; \
2328 extern AVCodec name ## _encoder
2329
2330 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
2331 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
2332 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
2333 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
2334 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
2335 PCM_CODEC(CODEC_ID_PCM_S24BE, pcm_s24be);
2336 PCM_CODEC(CODEC_ID_PCM_S24DAUD, pcm_s24daud);
2337 PCM_CODEC(CODEC_ID_PCM_S24LE, pcm_s24le);
2338 PCM_CODEC(CODEC_ID_PCM_S32BE, pcm_s32be);
2339 PCM_CODEC(CODEC_ID_PCM_S32LE, pcm_s32le);
2340 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
2341 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
2342 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
2343 PCM_CODEC(CODEC_ID_PCM_U24BE, pcm_u24be);
2344 PCM_CODEC(CODEC_ID_PCM_U24LE, pcm_u24le);
2345 PCM_CODEC(CODEC_ID_PCM_U32BE, pcm_u32be);
2346 PCM_CODEC(CODEC_ID_PCM_U32LE, pcm_u32le);
2347
2348 /* adpcm codecs */
2349
2350 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
2351 PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
2352 PCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
2353 PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
2354 PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
2355 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
2356 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
2357 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
2358 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
2359 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
2360 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
2361 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_2, adpcm_sbpro_2);
2362 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3);
2363 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4);
2364 PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
2365 PCM_CODEC(CODEC_ID_ADPCM_SWF, adpcm_swf);
2366 PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
2367 PCM_CODEC(CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha);
2368
2369 #undef PCM_CODEC
2370
2371 /* dummy raw video codec */
2372 extern AVCodec rawvideo_decoder;
2373 extern AVCodec rawvideo_encoder;
2374
2375 /* the following codecs use external GPL libs */
2376 extern AVCodec ac3_decoder;
2377 extern AVCodec dts_decoder;
2378
2379 /* subtitles */
2380 extern AVCodec dvbsub_decoder;
2381 extern AVCodec dvbsub_encoder;
2382 extern AVCodec dvdsub_decoder;
2383 extern AVCodec dvdsub_encoder;
2384
2385 /* resample.c */
2386
2387 struct ReSampleContext;
2388 struct AVResampleContext;
2389
2390 typedef struct ReSampleContext ReSampleContext;
2391
2392 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2393 int output_rate, int input_rate);
2394 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2395 void audio_resample_close(ReSampleContext *s);
2396
2397 struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2398 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2399 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2400 void av_resample_close(struct AVResampleContext *c);
2401
2402 /* YUV420 format is assumed ! */
2403
2404 struct ImgReSampleContext;
2405
2406 typedef struct ImgReSampleContext ImgReSampleContext;
2407
2408 ImgReSampleContext *img_resample_init(int output_width, int output_height,
2409 int input_width, int input_height);
2410
2411 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
2412 int iwidth, int iheight,
2413 int topBand, int bottomBand,
2414 int leftBand, int rightBand,
2415 int padtop, int padbottom,
2416 int padleft, int padright);
2417
2418
2419 void img_resample(ImgReSampleContext *s,
2420 AVPicture *output, const AVPicture *input);
2421
2422 void img_resample_close(ImgReSampleContext *s);
2423
2424 /**
2425 * Allocate memory for a picture. Call avpicture_free to free it.
2426 *
2427 * @param picture the picture to be filled in.
2428 * @param pix_fmt the format of the picture.
2429 * @param width the width of the picture.
2430 * @param height the height of the picture.
2431 * @return 0 if successful, -1 if not.
2432 */
2433 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2434
2435 /* Free a picture previously allocated by avpicture_alloc. */
2436 void avpicture_free(AVPicture *picture);
2437
2438 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2439 int pix_fmt, int width, int height);
2440 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2441 unsigned char *dest, int dest_size);
2442 int avpicture_get_size(int pix_fmt, int width, int height);
2443 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2444 const char *avcodec_get_pix_fmt_name(int pix_fmt);
2445 void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2446 enum PixelFormat avcodec_get_pix_fmt(const char* name);
2447 unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2448
2449 #define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
2450 #define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
2451 #define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
2452 #define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
2453 #define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
2454 #define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
2455
2456 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2457 int has_alpha);
2458 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2459 int has_alpha, int *loss_ptr);
2460
2461 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
2462 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
2463 int img_get_alpha_info(const AVPicture *src,
2464 int pix_fmt, int width, int height);
2465
2466 /* convert among pixel formats */
2467 int img_convert(AVPicture *dst, int dst_pix_fmt,
2468 const AVPicture *src, int pix_fmt,
2469 int width, int height);
2470
2471 /* deinterlace a picture */
2472 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2473 int pix_fmt, int width, int height);
2474
2475 /* external high level API */
2476
2477 extern AVCodec *first_avcodec;
2478
2479 /* returns LIBAVCODEC_VERSION_INT constant */
2480 unsigned avcodec_version(void);
2481 /* returns LIBAVCODEC_BUILD constant */
2482 unsigned avcodec_build(void);
2483 void avcodec_init(void);
2484
2485 void register_avcodec(AVCodec *format);
2486 AVCodec *avcodec_find_encoder(enum CodecID id);
2487 AVCodec *avcodec_find_encoder_by_name(const char *name);
2488 AVCodec *avcodec_find_decoder(enum CodecID id);
2489 AVCodec *avcodec_find_decoder_by_name(const char *name);
2490 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2491
2492 void avcodec_get_context_defaults(AVCodecContext *s);
2493 AVCodecContext *avcodec_alloc_context(void);
2494 void avcodec_get_frame_defaults(AVFrame *pic);
2495 AVFrame *avcodec_alloc_frame(void);
2496
2497 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2498 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2499 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2500 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2501 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2502 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2503
2504 int avcodec_thread_init(AVCodecContext *s, int thread_count);
2505 void avcodec_thread_free(AVCodecContext *s);
2506 int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2507 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2508 //FIXME func typedef
2509
2510 /**
2511 * opens / inits the AVCodecContext.
2512 * not thread save!
2513 */
2514 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2515
2516
2517 attribute_deprecated int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2518 int *frame_size_ptr,
2519 uint8_t *buf, int buf_size);
2520 /**
2521 * Decode an audio frame.
2522 *
2523 * @param avctx the codec context.
2524 * @param samples output buffer, 16 byte aligned
2525 * @param frame_size_ptr the output buffer size in bytes (you MUST set this to the allocated size before calling avcodec_decode_audio2()), zero if no frame could be compressed
2526 * @param buf input buffer, 16 byte aligned
2527 * @param buf_size the input buffer size
2528 * @return 0 if successful, -1 if not.
2529 */
2530 int avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
2531 int *frame_size_ptr,
2532 uint8_t *buf, int buf_size);
2533 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2534 int *got_picture_ptr,
2535 uint8_t *buf, int buf_size);
2536 int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
2537 int *got_sub_ptr,
2538 const uint8_t *buf, int buf_size);
2539 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2540 int *data_size_ptr,
2541 uint8_t *buf, int buf_size);
2542 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2543 const short *samples);
2544 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2545 const AVFrame *pict);
2546 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2547 const AVSubtitle *sub);
2548
2549 int avcodec_close(AVCodecContext *avctx);
2550
2551 void avcodec_register_all(void);
2552
2553 void avcodec_flush_buffers(AVCodecContext *avctx);
2554
2555 void avcodec_default_free_buffers(AVCodecContext *s);
2556
2557 /* misc usefull functions */
2558
2559 /**
2560 * returns a single letter to describe the picture type
2561 */
2562 char av_get_pict_type_char(int pict_type);
2563
2564 /**
2565 * returns codec bits per sample
2566 */
2567 int av_get_bits_per_sample(enum CodecID codec_id);
2568
2569 /* frame parsing */
2570 typedef struct AVCodecParserContext {
2571 void *priv_data;
2572 struct AVCodecParser *parser;
2573 int64_t frame_offset; /* offset of the current frame */
2574 int64_t cur_offset; /* current offset
2575 (incremented by each av_parser_parse()) */
2576 int64_t last_frame_offset; /* offset of the last frame */
2577 /* video info */
2578 int pict_type; /* XXX: put it back in AVCodecContext */
2579 int repeat_pict; /* XXX: put it back in AVCodecContext */
2580 int64_t pts; /* pts of the current frame */
2581 int64_t dts; /* dts of the current frame */
2582
2583 /* private data */
2584 int64_t last_pts;
2585 int64_t last_dts;
2586 int fetch_timestamp;
2587
2588 #define AV_PARSER_PTS_NB 4
2589 int cur_frame_start_index;
2590 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2591 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2592 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2593
2594 int flags;
2595 #define PARSER_FLAG_COMPLETE_FRAMES 0x0001
2596 } AVCodecParserContext;
2597
2598 typedef struct AVCodecParser {
2599 int codec_ids[5]; /* several codec IDs are permitted */
2600 int priv_data_size;
2601 int (*parser_init)(AVCodecParserContext *s);
2602 int (*parser_parse)(AVCodecParserContext *s,
2603 AVCodecContext *avctx,
2604 uint8_t **poutbuf, int *poutbuf_size,
2605 const uint8_t *buf, int buf_size);
2606 void (*parser_close)(AVCodecParserContext *s);
2607 int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
2608 struct AVCodecParser *next;
2609 } AVCodecParser;
2610
2611 extern AVCodecParser *av_first_parser;
2612
2613 void av_register_codec_parser(AVCodecParser *parser);
2614 AVCodecParserContext *av_parser_init(int codec_id);
2615 int av_parser_parse(AVCodecParserContext *s,
2616 AVCodecContext *avctx,
2617 uint8_t **poutbuf, int *poutbuf_size,
2618 const uint8_t *buf, int buf_size,
2619 int64_t pts, int64_t dts);
2620 int av_parser_change(AVCodecParserContext *s,
2621 AVCodecContext *avctx,
2622 uint8_t **poutbuf, int *poutbuf_size,
2623 const uint8_t *buf, int buf_size, int keyframe);
2624 void av_parser_close(AVCodecParserContext *s);
2625
2626 extern AVCodecParser aac_parser;
2627 extern AVCodecParser ac3_parser;
2628 extern AVCodecParser cavsvideo_parser;
2629 extern AVCodecParser dvbsub_parser;
2630 extern AVCodecParser dvdsub_parser;
2631 extern AVCodecParser h261_parser;
2632 extern AVCodecParser h263_parser;
2633 extern AVCodecParser h264_parser;
2634 extern AVCodecParser mjpeg_parser;
2635 extern AVCodecParser mpeg4video_parser;
2636 extern AVCodecParser mpegaudio_parser;
2637 extern AVCodecParser mpegvideo_parser;
2638 extern AVCodecParser pnm_parser;
2639
2640
2641 typedef struct AVBitStreamFilterContext {
2642 void *priv_data;
2643 struct AVBitStreamFilter *filter;
2644 AVCodecParserContext *parser;
2645 struct AVBitStreamFilterContext *next;
2646 } AVBitStreamFilterContext;
2647
2648
2649 typedef struct AVBitStreamFilter {
2650 const char *name;
2651 int priv_data_size;
2652 int (*filter)(AVBitStreamFilterContext *bsfc,
2653 AVCodecContext *avctx, const char *args,
2654 uint8_t **poutbuf, int *poutbuf_size,
2655 const uint8_t *buf, int buf_size, int keyframe);
2656 struct AVBitStreamFilter *next;
2657 } AVBitStreamFilter;
2658
2659 extern AVBitStreamFilter *av_first_bitstream_filter;
2660
2661 void av_register_bitstream_filter(AVBitStreamFilter *bsf);
2662 AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
2663 int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
2664 AVCodecContext *avctx, const char *args,
2665 uint8_t **poutbuf, int *poutbuf_size,
2666 const uint8_t *buf, int buf_size, int keyframe);
2667 void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
2668
2669 extern AVBitStreamFilter dump_extradata_bsf;
2670 extern AVBitStreamFilter remove_extradata_bsf;
2671 extern AVBitStreamFilter noise_bsf;
2672 extern AVBitStreamFilter mp3_header_compress_bsf;
2673 extern AVBitStreamFilter mp3_header_decompress_bsf;
2674 extern AVBitStreamFilter mjpega_dump_header_bsf;
2675
2676
2677 /* memory */
2678 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2679 /* for static data only */
2680 /* call av_free_static to release all staticaly allocated tables */
2681 void av_free_static(void);
2682 void *av_mallocz_static(unsigned int size);
2683 void *av_realloc_static(void *ptr, unsigned int size);
2684
2685 void img_copy(AVPicture *dst, const AVPicture *src,
2686 int pix_fmt, int width, int height);
2687
2688 int img_crop(AVPicture *dst, const AVPicture *src,
2689 int pix_fmt, int top_band, int left_band);
2690
2691 int img_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
2692 int padtop, int padbottom, int padleft, int padright, int *color);
2693
2694 extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
2695
2696 #ifdef __cplusplus
2697 }
2698 #endif
2699
2700 #endif /* AVCODEC_H */
Libav master