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source: vbox/trunk/src/libs/ffmpeg-20060710/libavcodec/avcodec.h@ 11551

Last change on this file since 11551 was 5776, checked in by vboxsync, 17 years ago

ffmpeg: exported to OSE
File size: 76.9 KB
Line 
1#ifndef AVCODEC_H
2#define AVCODEC_H
3
4/**
5 * @file avcodec.h
6 * external api header.
7 */
8
9
10#ifdef __cplusplus
11extern "C" {
12#endif
13
14#include "avutil.h"
15#include <sys/types.h> /* size_t */
16
17#define AV_STRINGIFY(s) AV_TOSTRING(s)
18#define AV_TOSTRING(s) #s
19
20#define LIBAVCODEC_VERSION_INT ((51<<16)+(10<<8)+0)
21#define LIBAVCODEC_VERSION 51.10.0
22#define LIBAVCODEC_BUILD LIBAVCODEC_VERSION_INT
23
24#define LIBAVCODEC_IDENT "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
25
26#define AV_NOPTS_VALUE int64_t_C(0x8000000000000000)
27#define AV_TIME_BASE 1000000
28#define AV_TIME_BASE_Q (AVRational){1, AV_TIME_BASE}
29
30enum CodecID {
31 CODEC_ID_NONE,
32 CODEC_ID_MPEG1VIDEO,
33 CODEC_ID_MPEG2VIDEO, /* prefered ID for MPEG Video 1 or 2 decoding */
34 CODEC_ID_MPEG2VIDEO_XVMC,
35 CODEC_ID_H261,
36 CODEC_ID_H263,
37 CODEC_ID_RV10,
38 CODEC_ID_RV20,
39 CODEC_ID_MJPEG,
40 CODEC_ID_MJPEGB,
41 CODEC_ID_LJPEG,
42 CODEC_ID_SP5X,
43 CODEC_ID_JPEGLS,
44 CODEC_ID_MPEG4,
45 CODEC_ID_RAWVIDEO,
46 CODEC_ID_MSMPEG4V1,
47 CODEC_ID_MSMPEG4V2,
48 CODEC_ID_MSMPEG4V3,
49 CODEC_ID_WMV1,
50 CODEC_ID_WMV2,
51 CODEC_ID_H263P,
52 CODEC_ID_H263I,
53 CODEC_ID_FLV1,
54 CODEC_ID_SVQ1,
55 CODEC_ID_SVQ3,
56 CODEC_ID_DVVIDEO,
57 CODEC_ID_HUFFYUV,
58 CODEC_ID_CYUV,
59 CODEC_ID_H264,
60 CODEC_ID_INDEO3,
61 CODEC_ID_VP3,
62 CODEC_ID_THEORA,
63 CODEC_ID_ASV1,
64 CODEC_ID_ASV2,
65 CODEC_ID_FFV1,
66 CODEC_ID_4XM,
67 CODEC_ID_VCR1,
68 CODEC_ID_CLJR,
69 CODEC_ID_MDEC,
70 CODEC_ID_ROQ,
71 CODEC_ID_INTERPLAY_VIDEO,
72 CODEC_ID_XAN_WC3,
73 CODEC_ID_XAN_WC4,
74 CODEC_ID_RPZA,
75 CODEC_ID_CINEPAK,
76 CODEC_ID_WS_VQA,
77 CODEC_ID_MSRLE,
78 CODEC_ID_MSVIDEO1,
79 CODEC_ID_IDCIN,
80 CODEC_ID_8BPS,
81 CODEC_ID_SMC,
82 CODEC_ID_FLIC,
83 CODEC_ID_TRUEMOTION1,
84 CODEC_ID_VMDVIDEO,
85 CODEC_ID_MSZH,
86 CODEC_ID_ZLIB,
87 CODEC_ID_QTRLE,
88 CODEC_ID_SNOW,
89 CODEC_ID_TSCC,
90 CODEC_ID_ULTI,
91 CODEC_ID_QDRAW,
92 CODEC_ID_VIXL,
93 CODEC_ID_QPEG,
94 CODEC_ID_XVID,
95 CODEC_ID_PNG,
96 CODEC_ID_PPM,
97 CODEC_ID_PBM,
98 CODEC_ID_PGM,
99 CODEC_ID_PGMYUV,
100 CODEC_ID_PAM,
101 CODEC_ID_FFVHUFF,
102 CODEC_ID_RV30,
103 CODEC_ID_RV40,
104 CODEC_ID_VC1,
105 CODEC_ID_WMV3,
106 CODEC_ID_LOCO,
107 CODEC_ID_WNV1,
108 CODEC_ID_AASC,
109 CODEC_ID_INDEO2,
110 CODEC_ID_FRAPS,
111 CODEC_ID_TRUEMOTION2,
112 CODEC_ID_BMP,
113 CODEC_ID_CSCD,
114 CODEC_ID_MMVIDEO,
115 CODEC_ID_ZMBV,
116 CODEC_ID_AVS,
117 CODEC_ID_SMACKVIDEO,
118 CODEC_ID_NUV,
119 CODEC_ID_KMVC,
120 CODEC_ID_FLASHSV,
121 CODEC_ID_CAVS,
122
123 /* various pcm "codecs" */
124 CODEC_ID_PCM_S16LE= 0x10000,
125 CODEC_ID_PCM_S16BE,
126 CODEC_ID_PCM_U16LE,
127 CODEC_ID_PCM_U16BE,
128 CODEC_ID_PCM_S8,
129 CODEC_ID_PCM_U8,
130 CODEC_ID_PCM_MULAW,
131 CODEC_ID_PCM_ALAW,
132 CODEC_ID_PCM_S32LE,
133 CODEC_ID_PCM_S32BE,
134 CODEC_ID_PCM_U32LE,
135 CODEC_ID_PCM_U32BE,
136 CODEC_ID_PCM_S24LE,
137 CODEC_ID_PCM_S24BE,
138 CODEC_ID_PCM_U24LE,
139 CODEC_ID_PCM_U24BE,
140 CODEC_ID_PCM_S24DAUD,
141
142 /* various adpcm codecs */
143 CODEC_ID_ADPCM_IMA_QT= 0x11000,
144 CODEC_ID_ADPCM_IMA_WAV,
145 CODEC_ID_ADPCM_IMA_DK3,
146 CODEC_ID_ADPCM_IMA_DK4,
147 CODEC_ID_ADPCM_IMA_WS,
148 CODEC_ID_ADPCM_IMA_SMJPEG,
149 CODEC_ID_ADPCM_MS,
150 CODEC_ID_ADPCM_4XM,
151 CODEC_ID_ADPCM_XA,
152 CODEC_ID_ADPCM_ADX,
153 CODEC_ID_ADPCM_EA,
154 CODEC_ID_ADPCM_G726,
155 CODEC_ID_ADPCM_CT,
156 CODEC_ID_ADPCM_SWF,
157 CODEC_ID_ADPCM_YAMAHA,
158 CODEC_ID_ADPCM_SBPRO_4,
159 CODEC_ID_ADPCM_SBPRO_3,
160 CODEC_ID_ADPCM_SBPRO_2,
161
162 /* AMR */
163 CODEC_ID_AMR_NB= 0x12000,
164 CODEC_ID_AMR_WB,
165
166 /* RealAudio codecs*/
167 CODEC_ID_RA_144= 0x13000,
168 CODEC_ID_RA_288,
169
170 /* various DPCM codecs */
171 CODEC_ID_ROQ_DPCM= 0x14000,
172 CODEC_ID_INTERPLAY_DPCM,
173 CODEC_ID_XAN_DPCM,
174 CODEC_ID_SOL_DPCM,
175
176 CODEC_ID_MP2= 0x15000,
177 CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
178 CODEC_ID_AAC,
179 CODEC_ID_MPEG4AAC,
180 CODEC_ID_AC3,
181 CODEC_ID_DTS,
182 CODEC_ID_VORBIS,
183 CODEC_ID_DVAUDIO,
184 CODEC_ID_WMAV1,
185 CODEC_ID_WMAV2,
186 CODEC_ID_MACE3,
187 CODEC_ID_MACE6,
188 CODEC_ID_VMDAUDIO,
189 CODEC_ID_SONIC,
190 CODEC_ID_SONIC_LS,
191 CODEC_ID_FLAC,
192 CODEC_ID_MP3ADU,
193 CODEC_ID_MP3ON4,
194 CODEC_ID_SHORTEN,
195 CODEC_ID_ALAC,
196 CODEC_ID_WESTWOOD_SND1,
197 CODEC_ID_GSM,
198 CODEC_ID_QDM2,
199 CODEC_ID_COOK,
200 CODEC_ID_TRUESPEECH,
201 CODEC_ID_TTA,
202 CODEC_ID_SMACKAUDIO,
203
204 CODEC_ID_OGGTHEORA= 0x16000,
205
206 /* subtitle codecs */
207 CODEC_ID_DVD_SUBTITLE= 0x17000,
208 CODEC_ID_DVB_SUBTITLE,
209
210 CODEC_ID_MPEG2TS= 0x20000, /* _FAKE_ codec to indicate a raw MPEG2 transport
211 stream (only used by libavformat) */
212};
213
214/* CODEC_ID_MP3LAME is absolete */
215#define CODEC_ID_MP3LAME CODEC_ID_MP3
216
217enum CodecType {
218 CODEC_TYPE_UNKNOWN = -1,
219 CODEC_TYPE_VIDEO,
220 CODEC_TYPE_AUDIO,
221 CODEC_TYPE_DATA,
222 CODEC_TYPE_SUBTITLE,
223};
224
225/* currently unused, may be used if 24/32 bits samples ever supported */
226/* all in native endian */
227enum SampleFormat {
228 SAMPLE_FMT_NONE = -1,
229 SAMPLE_FMT_U8, ///< unsigned 8 bits
230 SAMPLE_FMT_S16, ///< signed 16 bits
231 SAMPLE_FMT_S24, ///< signed 24 bits
232 SAMPLE_FMT_S32, ///< signed 32 bits
233 SAMPLE_FMT_FLT, ///< float
234};
235
236/* in bytes */
237#define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
238
239/**
240 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
241 * this is mainly needed because some optimized bitstream readers read
242 * 32 or 64 bit at once and could read over the end<br>
243 * Note, if the first 23 bits of the additional bytes are not 0 then damaged
244 * MPEG bitstreams could cause overread and segfault
245 */
246#define FF_INPUT_BUFFER_PADDING_SIZE 8
247
248/**
249 * minimum encoding buffer size.
250 * used to avoid some checks during header writing
251 */
252#define FF_MIN_BUFFER_SIZE 16384
253
254/* motion estimation type, EPZS by default */
255enum Motion_Est_ID {
256 ME_ZERO = 1,
257 ME_FULL,
258 ME_LOG,
259 ME_PHODS,
260 ME_EPZS,
261 ME_X1,
262 ME_HEX,
263 ME_UMH,
264 ME_ITER,
265};
266
267enum AVDiscard{
268//we leave some space between them for extensions (drop some keyframes for intra only or drop just some bidir frames)
269 AVDISCARD_NONE =-16, ///< discard nothing
270 AVDISCARD_DEFAULT= 0, ///< discard useless packets like 0 size packets in avi
271 AVDISCARD_NONREF = 8, ///< discard all non reference
272 AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
273 AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
274 AVDISCARD_ALL = 48, ///< discard all
275};
276
277typedef struct RcOverride{
278 int start_frame;
279 int end_frame;
280 int qscale; // if this is 0 then quality_factor will be used instead
281 float quality_factor;
282} RcOverride;
283
284#define FF_MAX_B_FRAMES 16
285
286/* encoding support
287 these flags can be passed in AVCodecContext.flags before initing
288 Note: not everything is supported yet.
289*/
290
291#define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
292#define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / Advanced prediction for H263
293#define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
294#define CODEC_FLAG_GMC 0x0020 ///< use GMC
295#define CODEC_FLAG_MV0 0x0040 ///< always try a MB with MV=<0,0>
296#define CODEC_FLAG_PART 0x0080 ///< use data partitioning
297/* parent program gurantees that the input for b-frame containing streams is not written to
298 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
299#define CODEC_FLAG_INPUT_PRESERVED 0x0100
300#define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
301#define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
302#define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
303#define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
304#define CODEC_FLAG_EMU_EDGE 0x4000///< don't draw edges
305#define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
306#define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
307 of only at frame boundaries */
308#define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
309#define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
310#define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay
311#define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
312#define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
313#define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
314#define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
315/* Fx : Flag for h263+ extra options */
316#define CODEC_FLAG_H263P_AIC 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
317#define CODEC_FLAG_AC_PRED 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
318#define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
319#define CODEC_FLAG_CBP_RD 0x04000000 ///< use rate distortion optimization for cbp
320#define CODEC_FLAG_QP_RD 0x08000000 ///< use rate distortion optimization for qp selectioon
321#define CODEC_FLAG_H263P_AIV 0x00000008 ///< H263 Alternative inter vlc
322#define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
323#define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
324#define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
325#define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
326#define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
327#define CODEC_FLAG_CLOSED_GOP ((int)0x80000000)
328#define CODEC_FLAG2_FAST 0x00000001 ///< allow non spec compliant speedup tricks
329#define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< strictly enforce GOP size
330#define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< skip bitstream encoding
331#define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< place global headers at every keyframe instead of in extradata
332#define CODEC_FLAG2_BPYRAMID 0x00000010 ///< H.264 allow b-frames to be used as references
333#define CODEC_FLAG2_WPRED 0x00000020 ///< H.264 weighted biprediction for b-frames
334#define CODEC_FLAG2_MIXED_REFS 0x00000040 ///< H.264 multiple references per partition
335#define CODEC_FLAG2_8X8DCT 0x00000080 ///< H.264 high profile 8x8 transform
336#define CODEC_FLAG2_FASTPSKIP 0x00000100 ///< H.264 fast pskip
337#define CODEC_FLAG2_AUD 0x00000200 ///< H.264 access unit delimiters
338#define CODEC_FLAG2_BRDO 0x00000400 ///< b-frame rate-distortion optimization
339#define CODEC_FLAG2_INTRA_VLC 0x00000800 ///< use MPEG-2 intra VLC table
340#define CODEC_FLAG2_MEMC_ONLY 0x00001000 ///< only do ME/MC (I frames -> ref, P frame -> ME+MC)
341
342/* Unsupported options :
343 * Syntax Arithmetic coding (SAC)
344 * Reference Picture Selection
345 * Independant Segment Decoding */
346/* /Fx */
347/* codec capabilities */
348
349#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
350/**
351 * Codec uses get_buffer() for allocating buffers.
352 * direct rendering method 1
353 */
354#define CODEC_CAP_DR1 0x0002
355/* if 'parse_only' field is true, then avcodec_parse_frame() can be
356 used */
357#define CODEC_CAP_PARSE_ONLY 0x0004
358#define CODEC_CAP_TRUNCATED 0x0008
359/* codec can export data for HW decoding (XvMC) */
360#define CODEC_CAP_HWACCEL 0x0010
361/**
362 * codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data.
363 * if this is not set, the codec is guranteed to never be feeded with NULL data
364 */
365#define CODEC_CAP_DELAY 0x0020
366/**
367 * Codec can be fed a final frame with a smaller size.
368 * This can be used to prevent truncation of the last audio samples.
369 */
370#define CODEC_CAP_SMALL_LAST_FRAME 0x0040
371
372//the following defines may change, don't expect compatibility if you use them
373#define MB_TYPE_INTRA4x4 0x0001
374#define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
375#define MB_TYPE_INTRA_PCM 0x0004 //FIXME h264 specific
376#define MB_TYPE_16x16 0x0008
377#define MB_TYPE_16x8 0x0010
378#define MB_TYPE_8x16 0x0020
379#define MB_TYPE_8x8 0x0040
380#define MB_TYPE_INTERLACED 0x0080
381#define MB_TYPE_DIRECT2 0x0100 //FIXME
382#define MB_TYPE_ACPRED 0x0200
383#define MB_TYPE_GMC 0x0400
384#define MB_TYPE_SKIP 0x0800
385#define MB_TYPE_P0L0 0x1000
386#define MB_TYPE_P1L0 0x2000
387#define MB_TYPE_P0L1 0x4000
388#define MB_TYPE_P1L1 0x8000
389#define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
390#define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
391#define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
392#define MB_TYPE_QUANT 0x00010000
393#define MB_TYPE_CBP 0x00020000
394//Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
395
396/**
397 * Pan Scan area.
398 * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
399 */
400typedef struct AVPanScan{
401 /**
402 * id.
403 * - encoding: set by user.
404 * - decoding: set by lavc
405 */
406 int id;
407
408 /**
409 * width and height in 1/16 pel
410 * - encoding: set by user.
411 * - decoding: set by lavc
412 */
413 int width;
414 int height;
415
416 /**
417 * position of the top left corner in 1/16 pel for up to 3 fields/frames.
418 * - encoding: set by user.
419 * - decoding: set by lavc
420 */
421 int16_t position[3][2];
422}AVPanScan;
423
424#define FF_COMMON_FRAME \
425 /**\
426 * pointer to the picture planes.\
427 * this might be different from the first allocated byte\
428 * - encoding: \
429 * - decoding: \
430 */\
431 uint8_t *data[4];\
432 int linesize[4];\
433 /**\
434 * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
435 * this isn't used by lavc unless the default get/release_buffer() is used\
436 * - encoding: \
437 * - decoding: \
438 */\
439 uint8_t *base[4];\
440 /**\
441 * 1 -> keyframe, 0-> not\
442 * - encoding: set by lavc\
443 * - decoding: set by lavc\
444 */\
445 int key_frame;\
446\
447 /**\
448 * picture type of the frame, see ?_TYPE below.\
449 * - encoding: set by lavc for coded_picture (and set by user for input)\
450 * - decoding: set by lavc\
451 */\
452 int pict_type;\
453\
454 /**\
455 * presentation timestamp in time_base units (time when frame should be shown to user)\
456 * if AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed\
457 * - encoding: MUST be set by user\
458 * - decoding: set by lavc\
459 */\
460 int64_t pts;\
461\
462 /**\
463 * picture number in bitstream order.\
464 * - encoding: set by\
465 * - decoding: set by lavc\
466 */\
467 int coded_picture_number;\
468 /**\
469 * picture number in display order.\
470 * - encoding: set by\
471 * - decoding: set by lavc\
472 */\
473 int display_picture_number;\
474\
475 /**\
476 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
477 * - encoding: set by lavc for coded_picture (and set by user for input)\
478 * - decoding: set by lavc\
479 */\
480 int quality; \
481\
482 /**\
483 * buffer age (1->was last buffer and dint change, 2->..., ...).\
484 * set to INT_MAX if the buffer has not been used yet \
485 * - encoding: unused\
486 * - decoding: MUST be set by get_buffer()\
487 */\
488 int age;\
489\
490 /**\
491 * is this picture used as reference\
492 * - encoding: unused\
493 * - decoding: set by lavc (before get_buffer() call))\
494 */\
495 int reference;\
496\
497 /**\
498 * QP table\
499 * - encoding: unused\
500 * - decoding: set by lavc\
501 */\
502 int8_t *qscale_table;\
503 /**\
504 * QP store stride\
505 * - encoding: unused\
506 * - decoding: set by lavc\
507 */\
508 int qstride;\
509\
510 /**\
511 * mbskip_table[mb]>=1 if MB didnt change\
512 * stride= mb_width = (width+15)>>4\
513 * - encoding: unused\
514 * - decoding: set by lavc\
515 */\
516 uint8_t *mbskip_table;\
517\
518 /**\
519 * Motion vector table.\
520 * @code\
521 * example:\
522 * int mv_sample_log2= 4 - motion_subsample_log2;\
523 * int mb_width= (width+15)>>4;\
524 * int mv_stride= (mb_width << mv_sample_log2) + 1;\
525 * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
526 * @endcode\
527 * - encoding: set by user\
528 * - decoding: set by lavc\
529 */\
530 int16_t (*motion_val[2])[2];\
531\
532 /**\
533 * Macroblock type table\
534 * mb_type_base + mb_width + 2\
535 * - encoding: set by user\
536 * - decoding: set by lavc\
537 */\
538 uint32_t *mb_type;\
539\
540 /**\
541 * log2 of the size of the block which a single vector in motion_val represents: \
542 * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
543 * - encoding: unused\
544 * - decoding: set by lavc\
545 */\
546 uint8_t motion_subsample_log2;\
547\
548 /**\
549 * for some private data of the user\
550 * - encoding: unused\
551 * - decoding: set by user\
552 */\
553 void *opaque;\
554\
555 /**\
556 * error\
557 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
558 * - decoding: unused\
559 */\
560 uint64_t error[4];\
561\
562 /**\
563 * type of the buffer (to keep track of who has to dealloc data[*])\
564 * - encoding: set by the one who allocs it\
565 * - decoding: set by the one who allocs it\
566 * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
567 */\
568 int type;\
569 \
570 /**\
571 * when decoding, this signal how much the picture must be delayed.\
572 * extra_delay = repeat_pict / (2*fps)\
573 * - encoding: unused\
574 * - decoding: set by lavc\
575 */\
576 int repeat_pict;\
577 \
578 /**\
579 * \
580 */\
581 int qscale_type;\
582 \
583 /**\
584 * The content of the picture is interlaced.\
585 * - encoding: set by user\
586 * - decoding: set by lavc (default 0)\
587 */\
588 int interlaced_frame;\
589 \
590 /**\
591 * if the content is interlaced, is top field displayed first.\
592 * - encoding: set by user\
593 * - decoding: set by lavc\
594 */\
595 int top_field_first;\
596 \
597 /**\
598 * Pan scan.\
599 * - encoding: set by user\
600 * - decoding: set by lavc\
601 */\
602 AVPanScan *pan_scan;\
603 \
604 /**\
605 * tell user application that palette has changed from previous frame.\
606 * - encoding: ??? (no palette-enabled encoder yet)\
607 * - decoding: set by lavc (default 0)\
608 */\
609 int palette_has_changed;\
610 \
611 /**\
612 * Codec suggestion on buffer type if != 0\
613 * - encoding: unused\
614 * - decoding: set by lavc (before get_buffer() call))\
615 */\
616 int buffer_hints;\
617\
618 /**\
619 * DCT coeffitients\
620 * - encoding: unused\
621 * - decoding: set by lavc\
622 */\
623 short *dct_coeff;\
624\
625 /**\
626 * Motion referece frame index\
627 * - encoding: set by user\
628 * - decoding: set by lavc\
629 */\
630 int8_t *ref_index[2];
631
632#define FF_QSCALE_TYPE_MPEG1 0
633#define FF_QSCALE_TYPE_MPEG2 1
634#define FF_QSCALE_TYPE_H264 2
635
636#define FF_BUFFER_TYPE_INTERNAL 1
637#define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
638#define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewhere else, don't dealloc image (data/base), all other tables are not shared
639#define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, don't dealloc anything
640
641
642#define FF_I_TYPE 1 // Intra
643#define FF_P_TYPE 2 // Predicted
644#define FF_B_TYPE 3 // Bi-dir predicted
645#define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
646#define FF_SI_TYPE 5
647#define FF_SP_TYPE 6
648
649#define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore)
650#define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
651#define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
652#define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
653
654/**
655 * Audio Video Frame.
656 */
657typedef struct AVFrame {
658 FF_COMMON_FRAME
659} AVFrame;
660
661#define DEFAULT_FRAME_RATE_BASE 1001000
662
663/**
664 * Used by av_log
665 */
666typedef struct AVCLASS AVClass;
667struct AVCLASS {
668 const char* class_name;
669 const char* (*item_name)(void*); /* actually passing a pointer to an AVCodecContext
670 or AVFormatContext, which begin with an AVClass.
671 Needed because av_log is in libavcodec and has no visibility
672 of AVIn/OutputFormat */
673 struct AVOption *option;
674};
675
676/**
677 * main external api structure.
678 */
679typedef struct AVCodecContext {
680 /**
681 * Info on struct for av_log
682 * - set by avcodec_alloc_context
683 */
684 AVClass *av_class;
685 /**
686 * the average bitrate.
687 * - encoding: set by user. unused for constant quantizer encoding
688 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
689 */
690 int bit_rate;
691
692 /**
693 * number of bits the bitstream is allowed to diverge from the reference.
694 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
695 * - encoding: set by user. unused for constant quantizer encoding
696 * - decoding: unused
697 */
698 int bit_rate_tolerance;
699
700 /**
701 * CODEC_FLAG_*.
702 * - encoding: set by user.
703 * - decoding: set by user.
704 */
705 int flags;
706
707 /**
708 * some codecs needs additionnal format info. It is stored here
709 * - encoding: set by user.
710 * - decoding: set by lavc. (FIXME is this ok?)
711 */
712 int sub_id;
713
714 /**
715 * motion estimation algorithm used for video coding.
716 * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
717 * 8 (umh), 9 (iter) [7, 8 are x264 specific, 9 is snow specific]
718 * - encoding: MUST be set by user.
719 * - decoding: unused
720 */
721 int me_method;
722
723 /**
724 * some codecs need / can use extra-data like huffman tables.
725 * mjpeg: huffman tables
726 * rv10: additional flags
727 * mpeg4: global headers (they can be in the bitstream or here)
728 * the allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
729 * then extradata_size to avoid prolems if its read with the bitstream reader
730 * the bytewise contents of extradata must not depend on the architecture or cpu endianness
731 * - encoding: set/allocated/freed by lavc.
732 * - decoding: set/allocated/freed by user.
733 */
734 void *extradata;
735 int extradata_size;
736
737 /**
738 * this is the fundamental unit of time (in seconds) in terms
739 * of which frame timestamps are represented. for fixed-fps content,
740 * timebase should be 1/framerate and timestamp increments should be
741 * identically 1.
742 * - encoding: MUST be set by user
743 * - decoding: set by lavc.
744 */
745 AVRational time_base;
746
747 /* video only */
748 /**
749 * picture width / height.
750 * - encoding: MUST be set by user.
751 * - decoding: set by lavc.
752 * Note, for compatibility its possible to set this instead of
753 * coded_width/height before decoding
754 */
755 int width, height;
756
757#define FF_ASPECT_EXTENDED 15
758
759 /**
760 * the number of pictures in a group of pitures, or 0 for intra_only.
761 * - encoding: set by user.
762 * - decoding: unused
763 */
764 int gop_size;
765
766 /**
767 * pixel format, see PIX_FMT_xxx.
768 * - encoding: set by user.
769 * - decoding: set by lavc.
770 */
771 enum PixelFormat pix_fmt;
772
773 /**
774 * Frame rate emulation. If not zero lower layer (i.e. format handler)
775 * has to read frames at native frame rate.
776 * - encoding: set by user.
777 * - decoding: unused.
778 */
779 int rate_emu;
780
781 /**
782 * if non NULL, 'draw_horiz_band' is called by the libavcodec
783 * decoder to draw an horizontal band. It improve cache usage. Not
784 * all codecs can do that. You must check the codec capabilities
785 * before
786 * - encoding: unused
787 * - decoding: set by user.
788 * @param height the height of the slice
789 * @param y the y position of the slice
790 * @param type 1->top field, 2->bottom field, 3->frame
791 * @param offset offset into the AVFrame.data from which the slice should be read
792 */
793 void (*draw_horiz_band)(struct AVCodecContext *s,
794 const AVFrame *src, int offset[4],
795 int y, int type, int height);
796
797 /* audio only */
798 int sample_rate; ///< samples per sec
799 int channels;
800
801 /**
802 * audio sample format.
803 * - encoding: set by user.
804 * - decoding: set by lavc.
805 */
806 enum SampleFormat sample_fmt; ///< sample format, currenly unused
807
808 /* the following data should not be initialized */
809 /**
810 * samples per packet. initialized when calling 'init'
811 */
812 int frame_size;
813 int frame_number; ///< audio or video frame number
814 int real_pict_num; ///< returns the real picture number of previous encoded frame
815
816 /**
817 * number of frames the decoded output will be delayed relative to
818 * the encoded input.
819 * - encoding: set by lavc.
820 * - decoding: unused
821 */
822 int delay;
823
824 /* - encoding parameters */
825 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
826 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
827
828 /**
829 * minimum quantizer.
830 * - encoding: set by user.
831 * - decoding: unused
832 */
833 int qmin;
834
835 /**
836 * maximum quantizer.
837 * - encoding: set by user.
838 * - decoding: unused
839 */
840 int qmax;
841
842 /**
843 * maximum quantizer difference etween frames.
844 * - encoding: set by user.
845 * - decoding: unused
846 */
847 int max_qdiff;
848
849 /**
850 * maximum number of b frames between non b frames.
851 * note: the output will be delayed by max_b_frames+1 relative to the input
852 * - encoding: set by user.
853 * - decoding: unused
854 */
855 int max_b_frames;
856
857 /**
858 * qscale factor between ip and b frames.
859 * - encoding: set by user.
860 * - decoding: unused
861 */
862 float b_quant_factor;
863
864 /** obsolete FIXME remove */
865 int rc_strategy;
866#define FF_RC_STRATEGY_XVID 1
867
868 int b_frame_strategy;
869
870 /**
871 * hurry up amount.
872 * deprecated in favor of skip_idct and skip_frame
873 * - encoding: unused
874 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
875 */
876 int hurry_up;
877
878 struct AVCodec *codec;
879
880 void *priv_data;
881
882 /* unused, FIXME remove*/
883 int rtp_mode;
884
885 int rtp_payload_size; /* The size of the RTP payload: the coder will */
886 /* do it's best to deliver a chunk with size */
887 /* below rtp_payload_size, the chunk will start */
888 /* with a start code on some codecs like H.263 */
889 /* This doesn't take account of any particular */
890 /* headers inside the transmited RTP payload */
891
892
893 /* The RTP callback: This function is called */
894 /* every time the encoder has a packet to send */
895 /* Depends on the encoder if the data starts */
896 /* with a Start Code (it should) H.263 does. */
897 /* mb_nb contains the number of macroblocks */
898 /* encoded in the RTP payload */
899 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
900
901 /* statistics, used for 2-pass encoding */
902 int mv_bits;
903 int header_bits;
904 int i_tex_bits;
905 int p_tex_bits;
906 int i_count;
907 int p_count;
908 int skip_count;
909 int misc_bits;
910
911 /**
912 * number of bits used for the previously encoded frame.
913 * - encoding: set by lavc
914 * - decoding: unused
915 */
916 int frame_bits;
917
918 /**
919 * private data of the user, can be used to carry app specific stuff.
920 * - encoding: set by user
921 * - decoding: set by user
922 */
923 void *opaque;
924
925 char codec_name[32];
926 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
927 enum CodecID codec_id; /* see CODEC_ID_xxx */
928
929 /**
930 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
931 * this is used to workaround some encoder bugs
932 * - encoding: set by user, if not then the default based on codec_id will be used
933 * - decoding: set by user, will be converted to upper case by lavc during init
934 */
935 unsigned int codec_tag;
936
937 /**
938 * workaround bugs in encoders which sometimes cannot be detected automatically.
939 * - encoding: set by user
940 * - decoding: set by user
941 */
942 int workaround_bugs;
943#define FF_BUG_AUTODETECT 1 ///< autodetection
944#define FF_BUG_OLD_MSMPEG4 2
945#define FF_BUG_XVID_ILACE 4
946#define FF_BUG_UMP4 8
947#define FF_BUG_NO_PADDING 16
948#define FF_BUG_AMV 32
949#define FF_BUG_AC_VLC 0 ///< will be removed, libavcodec can now handle these non compliant files by default
950#define FF_BUG_QPEL_CHROMA 64
951#define FF_BUG_STD_QPEL 128
952#define FF_BUG_QPEL_CHROMA2 256
953#define FF_BUG_DIRECT_BLOCKSIZE 512
954#define FF_BUG_EDGE 1024
955#define FF_BUG_HPEL_CHROMA 2048
956#define FF_BUG_DC_CLIP 4096
957#define FF_BUG_MS 8192 ///< workaround various bugs in microsofts broken decoders
958//#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
959
960 /**
961 * luma single coeff elimination threshold.
962 * - encoding: set by user
963 * - decoding: unused
964 */
965 int luma_elim_threshold;
966
967 /**
968 * chroma single coeff elimination threshold.
969 * - encoding: set by user
970 * - decoding: unused
971 */
972 int chroma_elim_threshold;
973
974 /**
975 * strictly follow the std (MPEG4, ...).
976 * - encoding: set by user
977 * - decoding: unused
978 */
979 int strict_std_compliance;
980#define FF_COMPLIANCE_VERY_STRICT 2 ///< strictly conform to a older more strict version of the spec or reference software
981#define FF_COMPLIANCE_STRICT 1 ///< strictly conform to all the things in the spec no matter what consequences
982#define FF_COMPLIANCE_NORMAL 0
983#define FF_COMPLIANCE_INOFFICIAL -1 ///< allow inofficial extensions
984#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< allow non standarized experimental things
985
986 /**
987 * qscale offset between ip and b frames.
988 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
989 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
990 * - encoding: set by user.
991 * - decoding: unused
992 */
993 float b_quant_offset;
994
995 /**
996 * error resilience higher values will detect more errors but may missdetect
997 * some more or less valid parts as errors.
998 * - encoding: unused
999 * - decoding: set by user
1000 */
1001 int error_resilience;
1002#define FF_ER_CAREFUL 1
1003#define FF_ER_COMPLIANT 2
1004#define FF_ER_AGGRESSIVE 3
1005#define FF_ER_VERY_AGGRESSIVE 4
1006
1007 /**
1008 * called at the beginning of each frame to get a buffer for it.
1009 * if pic.reference is set then the frame will be read later by lavc
1010 * avcodec_align_dimensions() should be used to find the required width and
1011 * height, as they normally need to be rounded up to the next multiple of 16
1012 * - encoding: unused
1013 * - decoding: set by lavc, user can override
1014 */
1015 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1016
1017 /**
1018 * called to release buffers which where allocated with get_buffer.
1019 * a released buffer can be reused in get_buffer()
1020 * pic.data[*] must be set to NULL
1021 * - encoding: unused
1022 * - decoding: set by lavc, user can override
1023 */
1024 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1025
1026 /**
1027 * if 1 the stream has a 1 frame delay during decoding.
1028 * - encoding: set by lavc
1029 * - decoding: set by lavc
1030 */
1031 int has_b_frames;
1032
1033 /**
1034 * number of bytes per packet if constant and known or 0
1035 * used by some WAV based audio codecs
1036 */
1037 int block_align;
1038
1039 int parse_only; /* - decoding only: if true, only parsing is done
1040 (function avcodec_parse_frame()). The frame
1041 data is returned. Only MPEG codecs support this now. */
1042
1043 /**
1044 * 0-> h263 quant 1-> mpeg quant.
1045 * - encoding: set by user.
1046 * - decoding: unused
1047 */
1048 int mpeg_quant;
1049
1050 /**
1051 * pass1 encoding statistics output buffer.
1052 * - encoding: set by lavc
1053 * - decoding: unused
1054 */
1055 char *stats_out;
1056
1057 /**
1058 * pass2 encoding statistics input buffer.
1059 * concatenated stuff from stats_out of pass1 should be placed here
1060 * - encoding: allocated/set/freed by user
1061 * - decoding: unused
1062 */
1063 char *stats_in;
1064
1065 /**
1066 * ratecontrol qmin qmax limiting method.
1067 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
1068 * - encoding: set by user.
1069 * - decoding: unused
1070 */
1071 float rc_qsquish;
1072
1073 float rc_qmod_amp;
1074 int rc_qmod_freq;
1075
1076 /**
1077 * ratecontrol override, see RcOverride.
1078 * - encoding: allocated/set/freed by user.
1079 * - decoding: unused
1080 */
1081 RcOverride *rc_override;
1082 int rc_override_count;
1083
1084 /**
1085 * rate control equation.
1086 * - encoding: set by user
1087 * - decoding: unused
1088 */
1089 char *rc_eq;
1090
1091 /**
1092 * maximum bitrate.
1093 * - encoding: set by user.
1094 * - decoding: unused
1095 */
1096 int rc_max_rate;
1097
1098 /**
1099 * minimum bitrate.
1100 * - encoding: set by user.
1101 * - decoding: unused
1102 */
1103 int rc_min_rate;
1104
1105 /**
1106 * decoder bitstream buffer size.
1107 * - encoding: set by user.
1108 * - decoding: unused
1109 */
1110 int rc_buffer_size;
1111 float rc_buffer_aggressivity;
1112
1113 /**
1114 * qscale factor between p and i frames.
1115 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1116 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1117 * - encoding: set by user.
1118 * - decoding: unused
1119 */
1120 float i_quant_factor;
1121
1122 /**
1123 * qscale offset between p and i frames.
1124 * - encoding: set by user.
1125 * - decoding: unused
1126 */
1127 float i_quant_offset;
1128
1129 /**
1130 * initial complexity for pass1 ratecontrol.
1131 * - encoding: set by user.
1132 * - decoding: unused
1133 */
1134 float rc_initial_cplx;
1135
1136 /**
1137 * dct algorithm, see FF_DCT_* below.
1138 * - encoding: set by user
1139 * - decoding: unused
1140 */
1141 int dct_algo;
1142#define FF_DCT_AUTO 0
1143#define FF_DCT_FASTINT 1
1144#define FF_DCT_INT 2
1145#define FF_DCT_MMX 3
1146#define FF_DCT_MLIB 4
1147#define FF_DCT_ALTIVEC 5
1148#define FF_DCT_FAAN 6
1149
1150 /**
1151 * luminance masking (0-> disabled).
1152 * - encoding: set by user
1153 * - decoding: unused
1154 */
1155 float lumi_masking;
1156
1157 /**
1158 * temporary complexity masking (0-> disabled).
1159 * - encoding: set by user
1160 * - decoding: unused
1161 */
1162 float temporal_cplx_masking;
1163
1164 /**
1165 * spatial complexity masking (0-> disabled).
1166 * - encoding: set by user
1167 * - decoding: unused
1168 */
1169 float spatial_cplx_masking;
1170
1171 /**
1172 * p block masking (0-> disabled).
1173 * - encoding: set by user
1174 * - decoding: unused
1175 */
1176 float p_masking;
1177
1178 /**
1179 * darkness masking (0-> disabled).
1180 * - encoding: set by user
1181 * - decoding: unused
1182 */
1183 float dark_masking;
1184
1185
1186 /* for binary compatibility */
1187 int unused;
1188
1189 /**
1190 * idct algorithm, see FF_IDCT_* below.
1191 * - encoding: set by user
1192 * - decoding: set by user
1193 */
1194 int idct_algo;
1195#define FF_IDCT_AUTO 0
1196#define FF_IDCT_INT 1
1197#define FF_IDCT_SIMPLE 2
1198#define FF_IDCT_SIMPLEMMX 3
1199#define FF_IDCT_LIBMPEG2MMX 4
1200#define FF_IDCT_PS2 5
1201#define FF_IDCT_MLIB 6
1202#define FF_IDCT_ARM 7
1203#define FF_IDCT_ALTIVEC 8
1204#define FF_IDCT_SH4 9
1205#define FF_IDCT_SIMPLEARM 10
1206#define FF_IDCT_H264 11
1207#define FF_IDCT_VP3 12
1208#define FF_IDCT_IPP 13
1209#define FF_IDCT_XVIDMMX 14
1210
1211 /**
1212 * slice count.
1213 * - encoding: set by lavc
1214 * - decoding: set by user (or 0)
1215 */
1216 int slice_count;
1217 /**
1218 * slice offsets in the frame in bytes.
1219 * - encoding: set/allocated by lavc
1220 * - decoding: set/allocated by user (or NULL)
1221 */
1222 int *slice_offset;
1223
1224 /**
1225 * error concealment flags.
1226 * - encoding: unused
1227 * - decoding: set by user
1228 */
1229 int error_concealment;
1230#define FF_EC_GUESS_MVS 1
1231#define FF_EC_DEBLOCK 2
1232
1233 /**
1234 * dsp_mask could be add used to disable unwanted CPU features
1235 * CPU features (i.e. MMX, SSE. ...)
1236 *
1237 * with FORCE flag you may instead enable given CPU features
1238 * (Dangerous: usable in case of misdetection, improper usage however will
1239 * result into program crash)
1240 */
1241 unsigned dsp_mask;
1242#define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
1243 /* lower 16 bits - CPU features */
1244#ifdef HAVE_MMX
1245#define FF_MM_MMX 0x0001 /* standard MMX */
1246#define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
1247#define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
1248#define FF_MM_SSE 0x0008 /* SSE functions */
1249#define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
1250#define FF_MM_3DNOWEXT 0x0020 /* AMD 3DNowExt */
1251#endif /* HAVE_MMX */
1252#ifdef HAVE_IWMMXT
1253#define FF_MM_IWMMXT 0x0100 /* XScale IWMMXT */
1254#endif /* HAVE_IWMMXT */
1255
1256 /**
1257 * bits per sample/pixel from the demuxer (needed for huffyuv).
1258 * - encoding: set by lavc
1259 * - decoding: set by user
1260 */
1261 int bits_per_sample;
1262
1263 /**
1264 * prediction method (needed for huffyuv).
1265 * - encoding: set by user
1266 * - decoding: unused
1267 */
1268 int prediction_method;
1269#define FF_PRED_LEFT 0
1270#define FF_PRED_PLANE 1
1271#define FF_PRED_MEDIAN 2
1272
1273 /**
1274 * sample aspect ratio (0 if unknown).
1275 * numerator and denominator must be relative prime and smaller then 256 for some video standards
1276 * - encoding: set by user.
1277 * - decoding: set by lavc.
1278 */
1279 AVRational sample_aspect_ratio;
1280
1281 /**
1282 * the picture in the bitstream.
1283 * - encoding: set by lavc
1284 * - decoding: set by lavc
1285 */
1286 AVFrame *coded_frame;
1287
1288 /**
1289 * debug.
1290 * - encoding: set by user.
1291 * - decoding: set by user.
1292 */
1293 int debug;
1294#define FF_DEBUG_PICT_INFO 1
1295#define FF_DEBUG_RC 2
1296#define FF_DEBUG_BITSTREAM 4
1297#define FF_DEBUG_MB_TYPE 8
1298#define FF_DEBUG_QP 16
1299#define FF_DEBUG_MV 32
1300#define FF_DEBUG_DCT_COEFF 0x00000040
1301#define FF_DEBUG_SKIP 0x00000080
1302#define FF_DEBUG_STARTCODE 0x00000100
1303#define FF_DEBUG_PTS 0x00000200
1304#define FF_DEBUG_ER 0x00000400
1305#define FF_DEBUG_MMCO 0x00000800
1306#define FF_DEBUG_BUGS 0x00001000
1307#define FF_DEBUG_VIS_QP 0x00002000
1308#define FF_DEBUG_VIS_MB_TYPE 0x00004000
1309
1310 /**
1311 * debug.
1312 * - encoding: set by user.
1313 * - decoding: set by user.
1314 */
1315 int debug_mv;
1316#define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1317#define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1318#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1319
1320 /**
1321 * error.
1322 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1323 * - decoding: unused
1324 */
1325 uint64_t error[4];
1326
1327 /**
1328 * minimum MB quantizer.
1329 * - encoding: unused
1330 * - decoding: unused
1331 */
1332 int mb_qmin;
1333
1334 /**
1335 * maximum MB quantizer.
1336 * - encoding: unused
1337 * - decoding: unused
1338 */
1339 int mb_qmax;
1340
1341 /**
1342 * motion estimation compare function.
1343 * - encoding: set by user.
1344 * - decoding: unused
1345 */
1346 int me_cmp;
1347 /**
1348 * subpixel motion estimation compare function.
1349 * - encoding: set by user.
1350 * - decoding: unused
1351 */
1352 int me_sub_cmp;
1353 /**
1354 * macroblock compare function (not supported yet).
1355 * - encoding: set by user.
1356 * - decoding: unused
1357 */
1358 int mb_cmp;
1359 /**
1360 * interlaced dct compare function
1361 * - encoding: set by user.
1362 * - decoding: unused
1363 */
1364 int ildct_cmp;
1365#define FF_CMP_SAD 0
1366#define FF_CMP_SSE 1
1367#define FF_CMP_SATD 2
1368#define FF_CMP_DCT 3
1369#define FF_CMP_PSNR 4
1370#define FF_CMP_BIT 5
1371#define FF_CMP_RD 6
1372#define FF_CMP_ZERO 7
1373#define FF_CMP_VSAD 8
1374#define FF_CMP_VSSE 9
1375#define FF_CMP_NSSE 10
1376#define FF_CMP_W53 11
1377#define FF_CMP_W97 12
1378#define FF_CMP_DCTMAX 13
1379#define FF_CMP_DCT264 14
1380#define FF_CMP_CHROMA 256
1381
1382 /**
1383 * ME diamond size & shape.
1384 * - encoding: set by user.
1385 * - decoding: unused
1386 */
1387 int dia_size;
1388
1389 /**
1390 * amount of previous MV predictors (2a+1 x 2a+1 square).
1391 * - encoding: set by user.
1392 * - decoding: unused
1393 */
1394 int last_predictor_count;
1395
1396 /**
1397 * pre pass for motion estimation.
1398 * - encoding: set by user.
1399 * - decoding: unused
1400 */
1401 int pre_me;
1402
1403 /**
1404 * motion estimation pre pass compare function.
1405 * - encoding: set by user.
1406 * - decoding: unused
1407 */
1408 int me_pre_cmp;
1409
1410 /**
1411 * ME pre pass diamond size & shape.
1412 * - encoding: set by user.
1413 * - decoding: unused
1414 */
1415 int pre_dia_size;
1416
1417 /**
1418 * subpel ME quality.
1419 * - encoding: set by user.
1420 * - decoding: unused
1421 */
1422 int me_subpel_quality;
1423
1424 /**
1425 * callback to negotiate the pixelFormat.
1426 * @param fmt is the list of formats which are supported by the codec,
1427 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1428 * the first is allways the native one
1429 * @return the choosen format
1430 * - encoding: unused
1431 * - decoding: set by user, if not set then the native format will always be choosen
1432 */
1433 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1434
1435 /**
1436 * DTG active format information (additionnal aspect ratio
1437 * information only used in DVB MPEG2 transport streams). 0 if
1438 * not set.
1439 *
1440 * - encoding: unused.
1441 * - decoding: set by decoder
1442 */
1443 int dtg_active_format;
1444#define FF_DTG_AFD_SAME 8
1445#define FF_DTG_AFD_4_3 9
1446#define FF_DTG_AFD_16_9 10
1447#define FF_DTG_AFD_14_9 11
1448#define FF_DTG_AFD_4_3_SP_14_9 13
1449#define FF_DTG_AFD_16_9_SP_14_9 14
1450#define FF_DTG_AFD_SP_4_3 15
1451
1452 /**
1453 * Maximum motion estimation search range in subpel units.
1454 * if 0 then no limit
1455 *
1456 * - encoding: set by user.
1457 * - decoding: unused.
1458 */
1459 int me_range;
1460
1461 /**
1462 * intra quantizer bias.
1463 * - encoding: set by user.
1464 * - decoding: unused
1465 */
1466 int intra_quant_bias;
1467#define FF_DEFAULT_QUANT_BIAS 999999
1468
1469 /**
1470 * inter quantizer bias.
1471 * - encoding: set by user.
1472 * - decoding: unused
1473 */
1474 int inter_quant_bias;
1475
1476 /**
1477 * color table ID.
1478 * - encoding: unused.
1479 * - decoding: which clrtable should be used for 8bit RGB images
1480 * table have to be stored somewhere FIXME
1481 */
1482 int color_table_id;
1483
1484 /**
1485 * internal_buffer count.
1486 * Don't touch, used by lavc default_get_buffer()
1487 */
1488 int internal_buffer_count;
1489
1490 /**
1491 * internal_buffers.
1492 * Don't touch, used by lavc default_get_buffer()
1493 */
1494 void *internal_buffer;
1495
1496#define FF_LAMBDA_SHIFT 7
1497#define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1498#define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1499#define FF_LAMBDA_MAX (256*128-1)
1500
1501#define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1502 /**
1503 * global quality for codecs which cannot change it per frame.
1504 * this should be proportional to MPEG1/2/4 qscale.
1505 * - encoding: set by user.
1506 * - decoding: unused
1507 */
1508 int global_quality;
1509
1510#define FF_CODER_TYPE_VLC 0
1511#define FF_CODER_TYPE_AC 1
1512 /**
1513 * coder type
1514 * - encoding: set by user.
1515 * - decoding: unused
1516 */
1517 int coder_type;
1518
1519 /**
1520 * context model
1521 * - encoding: set by user.
1522 * - decoding: unused
1523 */
1524 int context_model;
1525#if 0
1526 /**
1527 *
1528 * - encoding: unused
1529 * - decoding: set by user.
1530 */
1531 uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1532#endif
1533
1534 /**
1535 * slice flags
1536 * - encoding: unused
1537 * - decoding: set by user.
1538 */
1539 int slice_flags;
1540#define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1541#define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1542#define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1543
1544 /**
1545 * XVideo Motion Acceleration
1546 * - encoding: forbidden
1547 * - decoding: set by decoder
1548 */
1549 int xvmc_acceleration;
1550
1551 /**
1552 * macroblock decision mode
1553 * - encoding: set by user.
1554 * - decoding: unused
1555 */
1556 int mb_decision;
1557#define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1558#define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1559#define FF_MB_DECISION_RD 2 ///< rate distoration
1560
1561 /**
1562 * custom intra quantization matrix
1563 * - encoding: set by user, can be NULL
1564 * - decoding: set by lavc
1565 */
1566 uint16_t *intra_matrix;
1567
1568 /**
1569 * custom inter quantization matrix
1570 * - encoding: set by user, can be NULL
1571 * - decoding: set by lavc
1572 */
1573 uint16_t *inter_matrix;
1574
1575 /**
1576 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1577 * this is used to workaround some encoder bugs
1578 * - encoding: unused
1579 * - decoding: set by user, will be converted to upper case by lavc during init
1580 */
1581 unsigned int stream_codec_tag;
1582
1583 /**
1584 * scene change detection threshold.
1585 * 0 is default, larger means fewer detected scene changes
1586 * - encoding: set by user.
1587 * - decoding: unused
1588 */
1589 int scenechange_threshold;
1590
1591 /**
1592 * minimum lagrange multipler
1593 * - encoding: set by user.
1594 * - decoding: unused
1595 */
1596 int lmin;
1597
1598 /**
1599 * maximum lagrange multipler
1600 * - encoding: set by user.
1601 * - decoding: unused
1602 */
1603 int lmax;
1604
1605 /**
1606 * Palette control structure
1607 * - encoding: ??? (no palette-enabled encoder yet)
1608 * - decoding: set by user.
1609 */
1610 struct AVPaletteControl *palctrl;
1611
1612 /**
1613 * noise reduction strength
1614 * - encoding: set by user.
1615 * - decoding: unused
1616 */
1617 int noise_reduction;
1618
1619 /**
1620 * called at the beginning of a frame to get cr buffer for it.
1621 * buffer type (size, hints) must be the same. lavc won't check it.
1622 * lavc will pass previous buffer in pic, function should return
1623 * same buffer or new buffer with old frame "painted" into it.
1624 * if pic.data[0] == NULL must behave like get_buffer().
1625 * - encoding: unused
1626 * - decoding: set by lavc, user can override
1627 */
1628 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1629
1630 /**
1631 * number of bits which should be loaded into the rc buffer before decoding starts
1632 * - encoding: set by user.
1633 * - decoding: unused
1634 */
1635 int rc_initial_buffer_occupancy;
1636
1637 /**
1638 *
1639 * - encoding: set by user.
1640 * - decoding: unused
1641 */
1642 int inter_threshold;
1643
1644 /**
1645 * CODEC_FLAG2_*.
1646 * - encoding: set by user.
1647 * - decoding: set by user.
1648 */
1649 int flags2;
1650
1651 /**
1652 * simulates errors in the bitstream to test error concealment.
1653 * - encoding: set by user.
1654 * - decoding: unused.
1655 */
1656 int error_rate;
1657
1658 /**
1659 * MP3 antialias algorithm, see FF_AA_* below.
1660 * - encoding: unused
1661 * - decoding: set by user
1662 */
1663 int antialias_algo;
1664#define FF_AA_AUTO 0
1665#define FF_AA_FASTINT 1 //not implemented yet
1666#define FF_AA_INT 2
1667#define FF_AA_FLOAT 3
1668 /**
1669 * Quantizer noise shaping.
1670 * - encoding: set by user
1671 * - decoding: unused
1672 */
1673 int quantizer_noise_shaping;
1674
1675 /**
1676 * Thread count.
1677 * is used to decide how many independant tasks should be passed to execute()
1678 * - encoding: set by user
1679 * - decoding: set by user
1680 */
1681 int thread_count;
1682
1683 /**
1684 * the codec may call this to execute several independant things. it will return only after
1685 * finishing all tasks, the user may replace this with some multithreaded implementation, the
1686 * default implementation will execute the parts serially
1687 * @param count the number of things to execute
1688 * - encoding: set by lavc, user can override
1689 * - decoding: set by lavc, user can override
1690 */
1691 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1692
1693 /**
1694 * Thread opaque.
1695 * can be used by execute() to store some per AVCodecContext stuff.
1696 * - encoding: set by execute()
1697 * - decoding: set by execute()
1698 */
1699 void *thread_opaque;
1700
1701 /**
1702 * Motion estimation threshold. under which no motion estimation is
1703 * performed, but instead the user specified motion vectors are used
1704 *
1705 * - encoding: set by user
1706 * - decoding: unused
1707 */
1708 int me_threshold;
1709
1710 /**
1711 * Macroblock threshold. under which the user specified macroblock types will be used
1712 * - encoding: set by user
1713 * - decoding: unused
1714 */
1715 int mb_threshold;
1716
1717 /**
1718 * precision of the intra dc coefficient - 8.
1719 * - encoding: set by user
1720 * - decoding: unused
1721 */
1722 int intra_dc_precision;
1723
1724 /**
1725 * noise vs. sse weight for the nsse comparsion function.
1726 * - encoding: set by user
1727 * - decoding: unused
1728 */
1729 int nsse_weight;
1730
1731 /**
1732 * number of macroblock rows at the top which are skipped.
1733 * - encoding: unused
1734 * - decoding: set by user
1735 */
1736 int skip_top;
1737
1738 /**
1739 * number of macroblock rows at the bottom which are skipped.
1740 * - encoding: unused
1741 * - decoding: set by user
1742 */
1743 int skip_bottom;
1744
1745 /**
1746 * profile
1747 * - encoding: set by user
1748 * - decoding: set by lavc
1749 */
1750 int profile;
1751#define FF_PROFILE_UNKNOWN -99
1752
1753 /**
1754 * level
1755 * - encoding: set by user
1756 * - decoding: set by lavc
1757 */
1758 int level;
1759#define FF_LEVEL_UNKNOWN -99
1760
1761 /**
1762 * low resolution decoding. 1-> 1/2 size, 2->1/4 size
1763 * - encoding: unused
1764 * - decoding: set by user
1765 */
1766 int lowres;
1767
1768 /**
1769 * bitsream width / height. may be different from width/height if lowres
1770 * or other things are used
1771 * - encoding: unused
1772 * - decoding: set by user before init if known, codec should override / dynamically change if needed
1773 */
1774 int coded_width, coded_height;
1775
1776 /**
1777 * frame skip threshold
1778 * - encoding: set by user
1779 * - decoding: unused
1780 */
1781 int frame_skip_threshold;
1782
1783 /**
1784 * frame skip factor
1785 * - encoding: set by user
1786 * - decoding: unused
1787 */
1788 int frame_skip_factor;
1789
1790 /**
1791 * frame skip exponent
1792 * - encoding: set by user
1793 * - decoding: unused
1794 */
1795 int frame_skip_exp;
1796
1797 /**
1798 * frame skip comparission function
1799 * - encoding: set by user.
1800 * - decoding: unused
1801 */
1802 int frame_skip_cmp;
1803
1804 /**
1805 * border processing masking. raises the quantizer for mbs on the borders
1806 * of the picture.
1807 * - encoding: set by user
1808 * - decoding: unused
1809 */
1810 float border_masking;
1811
1812 /**
1813 * minimum MB lagrange multipler.
1814 * - encoding: set by user.
1815 * - decoding: unused
1816 */
1817 int mb_lmin;
1818
1819 /**
1820 * maximum MB lagrange multipler.
1821 * - encoding: set by user.
1822 * - decoding: unused
1823 */
1824 int mb_lmax;
1825
1826 /**
1827 *
1828 * - encoding: set by user.
1829 * - decoding: unused
1830 */
1831 int me_penalty_compensation;
1832
1833 /**
1834 *
1835 * - encoding: unused
1836 * - decoding: set by user.
1837 */
1838 enum AVDiscard skip_loop_filter;
1839
1840 /**
1841 *
1842 * - encoding: unused
1843 * - decoding: set by user.
1844 */
1845 enum AVDiscard skip_idct;
1846
1847 /**
1848 *
1849 * - encoding: unused
1850 * - decoding: set by user.
1851 */
1852 enum AVDiscard skip_frame;
1853
1854 /**
1855 *
1856 * - encoding: set by user.
1857 * - decoding: unused
1858 */
1859 int bidir_refine;
1860
1861 /**
1862 *
1863 * - encoding: set by user.
1864 * - decoding: unused
1865 */
1866 int brd_scale;
1867
1868 /**
1869 * constant rate factor - quality-based VBR - values ~correspond to qps
1870 * - encoding: set by user.
1871 * - decoding: unused
1872 */
1873 int crf;
1874
1875 /**
1876 * constant quantization parameter rate control method
1877 * - encoding: set by user.
1878 * - decoding: unused
1879 */
1880 int cqp;
1881
1882 /**
1883 * minimum gop size
1884 * - encoding: set by user.
1885 * - decoding: unused
1886 */
1887 int keyint_min;
1888
1889 /**
1890 * number of reference frames
1891 * - encoding: set by user.
1892 * - decoding: unused
1893 */
1894 int refs;
1895
1896 /**
1897 * chroma qp offset from luma
1898 * - encoding: set by user.
1899 * - decoding: unused
1900 */
1901 int chromaoffset;
1902
1903 /**
1904 * influences how often b-frames are used
1905 * - encoding: set by user.
1906 * - decoding: unused
1907 */
1908 int bframebias;
1909
1910 /**
1911 * trellis RD quantization
1912 * - encoding: set by user.
1913 * - decoding: unused
1914 */
1915 int trellis;
1916
1917 /**
1918 * reduce fluctuations in qp (before curve compression)
1919 * - encoding: set by user.
1920 * - decoding: unused
1921 */
1922 float complexityblur;
1923
1924 /**
1925 * in-loop deblocking filter alphac0 parameter
1926 * alpha is in the range -6...6
1927 * - encoding: set by user.
1928 * - decoding: unused
1929 */
1930 int deblockalpha;
1931
1932 /**
1933 * in-loop deblocking filter beta parameter
1934 * beta is in the range -6...6
1935 * - encoding: set by user.
1936 * - decoding: unused
1937 */
1938 int deblockbeta;
1939
1940 /**
1941 * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
1942 * - encoding: set by user.
1943 * - decoding: unused
1944 */
1945 int partitions;
1946#define X264_PART_I4X4 0x001 /* Analyse i4x4 */
1947#define X264_PART_I8X8 0x002 /* Analyse i8x8 (requires 8x8 transform) */
1948#define X264_PART_P8X8 0x010 /* Analyse p16x8, p8x16 and p8x8 */
1949#define X264_PART_P4X4 0x020 /* Analyse p8x4, p4x8, p4x4 */
1950#define X264_PART_B8X8 0x100 /* Analyse b16x8, b8x16 and b8x8 */
1951
1952 /**
1953 * direct mv prediction mode - 0 (none), 1 (spatial), 2 (temporal)
1954 * - encoding: set by user.
1955 * - decoding: unused
1956 */
1957 int directpred;
1958
1959 /**
1960 * audio cutoff bandwidth (0 means "automatic") . Currently used only by FAAC
1961 * - encoding: set by user.
1962 * - decoding: unused
1963 */
1964 int cutoff;
1965
1966 /**
1967 * multiplied by qscale for each frame and added to scene_change_score
1968 * - encoding: set by user.
1969 * - decoding: unused
1970 */
1971 int scenechange_factor;
1972
1973 /**
1974 *
1975 * note: value depends upon the compare functin used for fullpel ME
1976 * - encoding: set by user.
1977 * - decoding: unused
1978 */
1979 int mv0_threshold;
1980
1981 /**
1982 * adjusts sensitivity of b_frame_strategy 1
1983 * - encoding: set by user.
1984 * - decoding: unused
1985 */
1986 int b_sensitivity;
1987
1988 /**
1989 * - encoding: set by user.
1990 * - decoding: unused
1991 */
1992 int compression_level;
1993#define FF_COMPRESSION_DEFAULT -1
1994
1995 /**
1996 * sets whether to use LPC mode - used by FLAC encoder
1997 * - encoding: set by user.
1998 * - decoding: unused.
1999 */
2000 int use_lpc;
2001
2002 /**
2003 * LPC coefficient precision - used by FLAC encoder
2004 * - encoding: set by user.
2005 * - decoding: unused.
2006 */
2007 int lpc_coeff_precision;
2008
2009 /**
2010 * - encoding: set by user.
2011 * - decoding: unused.
2012 */
2013 int min_prediction_order;
2014
2015 /**
2016 * - encoding: set by user.
2017 * - decoding: unused.
2018 */
2019 int max_prediction_order;
2020
2021 /**
2022 * search method for selecting prediction order
2023 * - encoding: set by user.
2024 * - decoding: unused.
2025 */
2026 int prediction_order_method;
2027
2028 /**
2029 * - encoding: set by user.
2030 * - decoding: unused.
2031 */
2032 int min_partition_order;
2033
2034 /**
2035 * - encoding: set by user.
2036 * - decoding: unused.
2037 */
2038 int max_partition_order;
2039} AVCodecContext;
2040
2041/**
2042 * AVCodec.
2043 */
2044typedef struct AVCodec {
2045 const char *name;
2046 enum CodecType type;
2047 enum CodecID id;
2048 int priv_data_size;
2049 int (*init)(AVCodecContext *);
2050 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2051 int (*close)(AVCodecContext *);
2052 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
2053 uint8_t *buf, int buf_size);
2054 int capabilities;
2055#if LIBAVCODEC_VERSION_INT < ((50<<16)+(0<<8)+0)
2056 void *dummy; // FIXME remove next time we break binary compatibility
2057#endif
2058 struct AVCodec *next;
2059 void (*flush)(AVCodecContext *);
2060 const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
2061 const enum PixelFormat *pix_fmts; ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
2062} AVCodec;
2063
2064/**
2065 * four components are given, that's all.
2066 * the last component is alpha
2067 */
2068typedef struct AVPicture {
2069 uint8_t *data[4];
2070 int linesize[4]; ///< number of bytes per line
2071} AVPicture;
2072
2073/**
2074 * AVPaletteControl
2075 * This structure defines a method for communicating palette changes
2076 * between and demuxer and a decoder.
2077 */
2078#define AVPALETTE_SIZE 1024
2079#define AVPALETTE_COUNT 256
2080typedef struct AVPaletteControl {
2081
2082 /* demuxer sets this to 1 to indicate the palette has changed;
2083 * decoder resets to 0 */
2084 int palette_changed;
2085
2086 /* 4-byte ARGB palette entries, stored in native byte order; note that
2087 * the individual palette components should be on a 8-bit scale; if
2088 * the palette data comes from a IBM VGA native format, the component
2089 * data is probably 6 bits in size and needs to be scaled */
2090 unsigned int palette[AVPALETTE_COUNT];
2091
2092} AVPaletteControl;
2093
2094typedef struct AVSubtitleRect {
2095 uint16_t x;
2096 uint16_t y;
2097 uint16_t w;
2098 uint16_t h;
2099 uint16_t nb_colors;
2100 int linesize;
2101 uint32_t *rgba_palette;
2102 uint8_t *bitmap;
2103} AVSubtitleRect;
2104
2105typedef struct AVSubtitle {
2106 uint16_t format; /* 0 = graphics */
2107 uint32_t start_display_time; /* relative to packet pts, in ms */
2108 uint32_t end_display_time; /* relative to packet pts, in ms */
2109 uint32_t num_rects;
2110 AVSubtitleRect *rects;
2111} AVSubtitle;
2112
2113extern AVCodec ac3_encoder;
2114extern AVCodec mp2_encoder;
2115extern AVCodec mp3lame_encoder;
2116extern AVCodec oggvorbis_encoder;
2117extern AVCodec oggtheora_encoder;
2118extern AVCodec faac_encoder;
2119extern AVCodec flac_encoder;
2120extern AVCodec xvid_encoder;
2121extern AVCodec mpeg1video_encoder;
2122extern AVCodec mpeg2video_encoder;
2123extern AVCodec h261_encoder;
2124extern AVCodec h263_encoder;
2125extern AVCodec h263p_encoder;
2126extern AVCodec flv_encoder;
2127extern AVCodec rv10_encoder;
2128extern AVCodec rv20_encoder;
2129extern AVCodec dvvideo_encoder;
2130extern AVCodec mjpeg_encoder;
2131extern AVCodec ljpeg_encoder;
2132extern AVCodec jpegls_encoder;
2133extern AVCodec png_encoder;
2134extern AVCodec ppm_encoder;
2135extern AVCodec pgm_encoder;
2136extern AVCodec pgmyuv_encoder;
2137extern AVCodec pbm_encoder;
2138extern AVCodec pam_encoder;
2139extern AVCodec mpeg4_encoder;
2140extern AVCodec msmpeg4v1_encoder;
2141extern AVCodec msmpeg4v2_encoder;
2142extern AVCodec msmpeg4v3_encoder;
2143extern AVCodec wmv1_encoder;
2144extern AVCodec wmv2_encoder;
2145extern AVCodec huffyuv_encoder;
2146extern AVCodec ffvhuff_encoder;
2147extern AVCodec h264_encoder;
2148extern AVCodec asv1_encoder;
2149extern AVCodec asv2_encoder;
2150extern AVCodec vcr1_encoder;
2151extern AVCodec ffv1_encoder;
2152extern AVCodec snow_encoder;
2153extern AVCodec mdec_encoder;
2154extern AVCodec zlib_encoder;
2155extern AVCodec sonic_encoder;
2156extern AVCodec sonic_ls_encoder;
2157extern AVCodec svq1_encoder;
2158extern AVCodec x264_encoder;
2159
2160extern AVCodec h263_decoder;
2161extern AVCodec h261_decoder;
2162extern AVCodec mpeg4_decoder;
2163extern AVCodec msmpeg4v1_decoder;
2164extern AVCodec msmpeg4v2_decoder;
2165extern AVCodec msmpeg4v3_decoder;
2166extern AVCodec wmv1_decoder;
2167extern AVCodec wmv2_decoder;
2168extern AVCodec vc1_decoder;
2169extern AVCodec wmv3_decoder;
2170extern AVCodec mpeg1video_decoder;
2171extern AVCodec mpeg2video_decoder;
2172extern AVCodec mpegvideo_decoder;
2173extern AVCodec mpeg_xvmc_decoder;
2174extern AVCodec h263i_decoder;
2175extern AVCodec flv_decoder;
2176extern AVCodec rv10_decoder;
2177extern AVCodec rv20_decoder;
2178extern AVCodec rv30_decoder;
2179extern AVCodec rv40_decoder;
2180extern AVCodec svq1_decoder;
2181extern AVCodec svq3_decoder;
2182extern AVCodec dvvideo_decoder;
2183extern AVCodec wmav1_decoder;
2184extern AVCodec wmav2_decoder;
2185extern AVCodec mjpeg_decoder;
2186extern AVCodec mjpegb_decoder;
2187extern AVCodec sp5x_decoder;
2188extern AVCodec png_decoder;
2189extern AVCodec mp2_decoder;
2190extern AVCodec mp3_decoder;
2191extern AVCodec mp3adu_decoder;
2192extern AVCodec mp3on4_decoder;
2193extern AVCodec qdm2_decoder;
2194extern AVCodec cook_decoder;
2195extern AVCodec truespeech_decoder;
2196extern AVCodec tta_decoder;
2197extern AVCodec mace3_decoder;
2198extern AVCodec mace6_decoder;
2199extern AVCodec huffyuv_decoder;
2200extern AVCodec ffvhuff_decoder;
2201extern AVCodec oggvorbis_decoder;
2202extern AVCodec oggtheora_decoder;
2203extern AVCodec cyuv_decoder;
2204extern AVCodec h264_decoder;
2205extern AVCodec indeo3_decoder;
2206extern AVCodec vp3_decoder;
2207extern AVCodec theora_decoder;
2208extern AVCodec amr_nb_decoder;
2209extern AVCodec amr_nb_encoder;
2210extern AVCodec amr_wb_encoder;
2211extern AVCodec amr_wb_decoder;
2212extern AVCodec aac_decoder;
2213extern AVCodec mpeg4aac_decoder;
2214extern AVCodec asv1_decoder;
2215extern AVCodec asv2_decoder;
2216extern AVCodec vcr1_decoder;
2217extern AVCodec cljr_decoder;
2218extern AVCodec ffv1_decoder;
2219extern AVCodec snow_decoder;
2220extern AVCodec fourxm_decoder;
2221extern AVCodec mdec_decoder;
2222extern AVCodec roq_decoder;
2223extern AVCodec interplay_video_decoder;
2224extern AVCodec xan_wc3_decoder;
2225extern AVCodec rpza_decoder;
2226extern AVCodec cinepak_decoder;
2227extern AVCodec msrle_decoder;
2228extern AVCodec msvideo1_decoder;
2229extern AVCodec vqa_decoder;
2230extern AVCodec idcin_decoder;
2231extern AVCodec eightbps_decoder;
2232extern AVCodec smc_decoder;
2233extern AVCodec flic_decoder;
2234extern AVCodec vmdvideo_decoder;
2235extern AVCodec vmdaudio_decoder;
2236extern AVCodec truemotion1_decoder;
2237extern AVCodec truemotion2_decoder;
2238extern AVCodec mszh_decoder;
2239extern AVCodec zlib_decoder;
2240extern AVCodec ra_144_decoder;
2241extern AVCodec ra_288_decoder;
2242extern AVCodec roq_dpcm_decoder;
2243extern AVCodec interplay_dpcm_decoder;
2244extern AVCodec xan_dpcm_decoder;
2245extern AVCodec sol_dpcm_decoder;
2246extern AVCodec sonic_decoder;
2247extern AVCodec qtrle_decoder;
2248extern AVCodec flac_decoder;
2249extern AVCodec tscc_decoder;
2250extern AVCodec cscd_decoder;
2251extern AVCodec nuv_decoder;
2252extern AVCodec ulti_decoder;
2253extern AVCodec qdraw_decoder;
2254extern AVCodec xl_decoder;
2255extern AVCodec qpeg_decoder;
2256extern AVCodec shorten_decoder;
2257extern AVCodec loco_decoder;
2258extern AVCodec wnv1_decoder;
2259extern AVCodec aasc_decoder;
2260extern AVCodec alac_decoder;
2261extern AVCodec ws_snd1_decoder;
2262extern AVCodec indeo2_decoder;
2263extern AVCodec vorbis_decoder;
2264extern AVCodec fraps_decoder;
2265extern AVCodec libgsm_encoder;
2266extern AVCodec libgsm_decoder;
2267extern AVCodec bmp_decoder;
2268extern AVCodec mmvideo_decoder;
2269extern AVCodec zmbv_decoder;
2270extern AVCodec avs_decoder;
2271extern AVCodec smacker_decoder;
2272extern AVCodec smackaud_decoder;
2273extern AVCodec kmvc_decoder;
2274extern AVCodec flashsv_decoder;
2275extern AVCodec cavs_decoder;
2276
2277/* pcm codecs */
2278#define PCM_CODEC(id, name) \
2279extern AVCodec name ## _decoder; \
2280extern AVCodec name ## _encoder
2281
2282PCM_CODEC(CODEC_ID_PCM_S32LE, pcm_s32le);
2283PCM_CODEC(CODEC_ID_PCM_S32BE, pcm_s32be);
2284PCM_CODEC(CODEC_ID_PCM_U32LE, pcm_u32le);
2285PCM_CODEC(CODEC_ID_PCM_U32BE, pcm_u32be);
2286PCM_CODEC(CODEC_ID_PCM_S24LE, pcm_s24le);
2287PCM_CODEC(CODEC_ID_PCM_S24BE, pcm_s24be);
2288PCM_CODEC(CODEC_ID_PCM_U24LE, pcm_u24le);
2289PCM_CODEC(CODEC_ID_PCM_U24BE, pcm_u24be);
2290PCM_CODEC(CODEC_ID_PCM_S24DAUD, pcm_s24daud);
2291PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
2292PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
2293PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
2294PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
2295PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
2296PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
2297PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
2298PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
2299
2300/* adpcm codecs */
2301
2302PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
2303PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
2304PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
2305PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
2306PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
2307PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
2308PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
2309PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
2310PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
2311PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
2312PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
2313PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
2314PCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
2315PCM_CODEC(CODEC_ID_ADPCM_SWF, adpcm_swf);
2316PCM_CODEC(CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha);
2317PCM_CODEC(CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4);
2318PCM_CODEC(CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3);
2319PCM_CODEC(CODEC_ID_ADPCM_SBPRO_2, adpcm_sbpro_2);
2320
2321#undef PCM_CODEC
2322
2323/* dummy raw video codec */
2324extern AVCodec rawvideo_encoder;
2325extern AVCodec rawvideo_decoder;
2326
2327/* the following codecs use external GPL libs */
2328extern AVCodec ac3_decoder;
2329extern AVCodec dts_decoder;
2330
2331/* subtitles */
2332extern AVCodec dvdsub_encoder;
2333extern AVCodec dvdsub_decoder;
2334extern AVCodec dvbsub_encoder;
2335extern AVCodec dvbsub_decoder;
2336
2337/* resample.c */
2338
2339struct ReSampleContext;
2340struct AVResampleContext;
2341
2342typedef struct ReSampleContext ReSampleContext;
2343
2344ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2345 int output_rate, int input_rate);
2346int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2347void audio_resample_close(ReSampleContext *s);
2348
2349struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2350int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2351void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2352void av_resample_close(struct AVResampleContext *c);
2353
2354/* YUV420 format is assumed ! */
2355
2356struct ImgReSampleContext;
2357
2358typedef struct ImgReSampleContext ImgReSampleContext;
2359
2360ImgReSampleContext *img_resample_init(int output_width, int output_height,
2361 int input_width, int input_height);
2362
2363ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
2364 int iwidth, int iheight,
2365 int topBand, int bottomBand,
2366 int leftBand, int rightBand,
2367 int padtop, int padbottom,
2368 int padleft, int padright);
2369
2370
2371void img_resample(ImgReSampleContext *s,
2372 AVPicture *output, const AVPicture *input);
2373
2374void img_resample_close(ImgReSampleContext *s);
2375
2376/**
2377 * Allocate memory for a picture. Call avpicture_free to free it.
2378 *
2379 * @param picture the picture to be filled in.
2380 * @param pix_fmt the format of the picture.
2381 * @param width the width of the picture.
2382 * @param height the height of the picture.
2383 * @return 0 if successful, -1 if not.
2384 */
2385int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2386
2387/* Free a picture previously allocated by avpicture_alloc. */
2388void avpicture_free(AVPicture *picture);
2389
2390int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2391 int pix_fmt, int width, int height);
2392int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2393 unsigned char *dest, int dest_size);
2394int avpicture_get_size(int pix_fmt, int width, int height);
2395void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2396const char *avcodec_get_pix_fmt_name(int pix_fmt);
2397void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2398enum PixelFormat avcodec_get_pix_fmt(const char* name);
2399unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2400
2401#define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
2402#define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
2403#define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
2404#define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
2405#define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
2406#define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
2407
2408int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2409 int has_alpha);
2410int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2411 int has_alpha, int *loss_ptr);
2412
2413#define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
2414#define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
2415int img_get_alpha_info(const AVPicture *src,
2416 int pix_fmt, int width, int height);
2417
2418/* convert among pixel formats */
2419int img_convert(AVPicture *dst, int dst_pix_fmt,
2420 const AVPicture *src, int pix_fmt,
2421 int width, int height);
2422
2423/* deinterlace a picture */
2424int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2425 int pix_fmt, int width, int height);
2426
2427/* external high level API */
2428
2429extern AVCodec *first_avcodec;
2430
2431/* returns LIBAVCODEC_VERSION_INT constant */
2432unsigned avcodec_version(void);
2433/* returns LIBAVCODEC_BUILD constant */
2434unsigned avcodec_build(void);
2435void avcodec_init(void);
2436
2437void register_avcodec(AVCodec *format);
2438AVCodec *avcodec_find_encoder(enum CodecID id);
2439AVCodec *avcodec_find_encoder_by_name(const char *name);
2440AVCodec *avcodec_find_decoder(enum CodecID id);
2441AVCodec *avcodec_find_decoder_by_name(const char *name);
2442void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2443
2444void avcodec_get_context_defaults(AVCodecContext *s);
2445AVCodecContext *avcodec_alloc_context(void);
2446void avcodec_get_frame_defaults(AVFrame *pic);
2447AVFrame *avcodec_alloc_frame(void);
2448
2449int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2450void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2451int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2452void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2453int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2454enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2455
2456int avcodec_thread_init(AVCodecContext *s, int thread_count);
2457void avcodec_thread_free(AVCodecContext *s);
2458int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2459int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2460//FIXME func typedef
2461
2462/**
2463 * opens / inits the AVCodecContext.
2464 * not thread save!
2465 */
2466int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2467
2468int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2469 int *frame_size_ptr,
2470 uint8_t *buf, int buf_size);
2471int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2472 int *got_picture_ptr,
2473 uint8_t *buf, int buf_size);
2474int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
2475 int *got_sub_ptr,
2476 const uint8_t *buf, int buf_size);
2477int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2478 int *data_size_ptr,
2479 uint8_t *buf, int buf_size);
2480int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2481 const short *samples);
2482int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2483 const AVFrame *pict);
2484int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2485 const AVSubtitle *sub);
2486
2487int avcodec_close(AVCodecContext *avctx);
2488
2489void avcodec_register_all(void);
2490
2491void avcodec_flush_buffers(AVCodecContext *avctx);
2492
2493void avcodec_default_free_buffers(AVCodecContext *s);
2494
2495/* misc usefull functions */
2496
2497/**
2498 * returns a single letter to describe the picture type
2499 */
2500char av_get_pict_type_char(int pict_type);
2501
2502/**
2503 * returns codec bits per sample
2504 */
2505int av_get_bits_per_sample(enum CodecID codec_id);
2506
2507/* frame parsing */
2508typedef struct AVCodecParserContext {
2509 void *priv_data;
2510 struct AVCodecParser *parser;
2511 int64_t frame_offset; /* offset of the current frame */
2512 int64_t cur_offset; /* current offset
2513 (incremented by each av_parser_parse()) */
2514 int64_t last_frame_offset; /* offset of the last frame */
2515 /* video info */
2516 int pict_type; /* XXX: put it back in AVCodecContext */
2517 int repeat_pict; /* XXX: put it back in AVCodecContext */
2518 int64_t pts; /* pts of the current frame */
2519 int64_t dts; /* dts of the current frame */
2520
2521 /* private data */
2522 int64_t last_pts;
2523 int64_t last_dts;
2524 int fetch_timestamp;
2525
2526#define AV_PARSER_PTS_NB 4
2527 int cur_frame_start_index;
2528 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2529 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2530 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2531
2532 int flags;
2533#define PARSER_FLAG_COMPLETE_FRAMES 0x0001
2534} AVCodecParserContext;
2535
2536typedef struct AVCodecParser {
2537 int codec_ids[5]; /* several codec IDs are permitted */
2538 int priv_data_size;
2539 int (*parser_init)(AVCodecParserContext *s);
2540 int (*parser_parse)(AVCodecParserContext *s,
2541 AVCodecContext *avctx,
2542 uint8_t **poutbuf, int *poutbuf_size,
2543 const uint8_t *buf, int buf_size);
2544 void (*parser_close)(AVCodecParserContext *s);
2545 int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
2546 struct AVCodecParser *next;
2547} AVCodecParser;
2548
2549extern AVCodecParser *av_first_parser;
2550
2551void av_register_codec_parser(AVCodecParser *parser);
2552AVCodecParserContext *av_parser_init(int codec_id);
2553int av_parser_parse(AVCodecParserContext *s,
2554 AVCodecContext *avctx,
2555 uint8_t **poutbuf, int *poutbuf_size,
2556 const uint8_t *buf, int buf_size,
2557 int64_t pts, int64_t dts);
2558int av_parser_change(AVCodecParserContext *s,
2559 AVCodecContext *avctx,
2560 uint8_t **poutbuf, int *poutbuf_size,
2561 const uint8_t *buf, int buf_size, int keyframe);
2562void av_parser_close(AVCodecParserContext *s);
2563
2564extern AVCodecParser mpegvideo_parser;
2565extern AVCodecParser mpeg4video_parser;
2566extern AVCodecParser cavsvideo_parser;
2567extern AVCodecParser h261_parser;
2568extern AVCodecParser h263_parser;
2569extern AVCodecParser h264_parser;
2570extern AVCodecParser mjpeg_parser;
2571extern AVCodecParser pnm_parser;
2572extern AVCodecParser mpegaudio_parser;
2573extern AVCodecParser ac3_parser;
2574extern AVCodecParser dvdsub_parser;
2575extern AVCodecParser dvbsub_parser;
2576extern AVCodecParser aac_parser;
2577
2578
2579typedef struct AVBitStreamFilterContext {
2580 void *priv_data;
2581 struct AVBitStreamFilter *filter;
2582 AVCodecParserContext *parser;
2583 struct AVBitStreamFilterContext *next;
2584} AVBitStreamFilterContext;
2585
2586
2587typedef struct AVBitStreamFilter {
2588 const char *name;
2589 int priv_data_size;
2590 int (*filter)(AVBitStreamFilterContext *bsfc,
2591 AVCodecContext *avctx, const char *args,
2592 uint8_t **poutbuf, int *poutbuf_size,
2593 const uint8_t *buf, int buf_size, int keyframe);
2594 struct AVBitStreamFilter *next;
2595} AVBitStreamFilter;
2596
2597extern AVBitStreamFilter *av_first_bitstream_filter;
2598
2599void av_register_bitstream_filter(AVBitStreamFilter *bsf);
2600AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
2601int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
2602 AVCodecContext *avctx, const char *args,
2603 uint8_t **poutbuf, int *poutbuf_size,
2604 const uint8_t *buf, int buf_size, int keyframe);
2605void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
2606
2607extern AVBitStreamFilter dump_extradata_bsf;
2608extern AVBitStreamFilter remove_extradata_bsf;
2609extern AVBitStreamFilter noise_bsf;
2610
2611
2612/* memory */
2613void *av_malloc(unsigned int size);
2614void *av_mallocz(unsigned int size);
2615void *av_realloc(void *ptr, unsigned int size);
2616void av_free(void *ptr);
2617char *av_strdup(const char *s);
2618void av_freep(void *ptr);
2619void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2620/* for static data only */
2621/* call av_free_static to release all staticaly allocated tables */
2622void av_free_static(void);
2623void *av_mallocz_static(unsigned int size);
2624void *av_realloc_static(void *ptr, unsigned int size);
2625
2626void img_copy(AVPicture *dst, const AVPicture *src,
2627 int pix_fmt, int width, int height);
2628
2629int img_crop(AVPicture *dst, const AVPicture *src,
2630 int pix_fmt, int top_band, int left_band);
2631
2632int img_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
2633 int padtop, int padbottom, int padleft, int padright, int *color);
2634
2635/* av_log API */
2636
2637#include <stdarg.h>
2638
2639#define AV_LOG_QUIET -1
2640#define AV_LOG_ERROR 0
2641#define AV_LOG_INFO 1
2642#define AV_LOG_DEBUG 2
2643
2644#ifdef __GNUC__
2645extern void av_log(void*, int level, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 3, 4)));
2646#else
2647extern void av_log(void*, int level, const char *fmt, ...);
2648#endif
2649
2650extern void av_vlog(void*, int level, const char *fmt, va_list);
2651extern int av_log_get_level(void);
2652extern void av_log_set_level(int);
2653extern void av_log_set_callback(void (*)(void*, int, const char*, va_list));
2654
2655/* endian macros */
2656#if !defined(BE_16) || !defined(BE_32) || !defined(LE_16) || !defined(LE_32)
2657#define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
2658#define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
2659 (((uint8_t*)(x))[1] << 16) | \
2660 (((uint8_t*)(x))[2] << 8) | \
2661 ((uint8_t*)(x))[3])
2662#define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
2663#define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \
2664 (((uint8_t*)(x))[2] << 16) | \
2665 (((uint8_t*)(x))[1] << 8) | \
2666 ((uint8_t*)(x))[0])
2667#endif
2668
2669extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
2670
2671#ifdef __cplusplus
2672}
2673#endif
2674
2675#endif /* AVCODEC_H */
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