d128cb9c1824f8ac3bd350156ae790ca4afc8b53
[libav.git] / libavcodec / avcodec.h
1 #ifndef AVCODEC_H
2 #define AVCODEC_H
3
4 /**
5 * @file avcodec.h
6 * external api header.
7 */
8
9
10 #ifdef __cplusplus
11 extern "C" {
12 #endif
13
14 #include "avutil.h"
15 #include <sys/types.h> /* size_t */
16
17 //FIXME the following 2 really dont belong in here
18 #define FFMPEG_VERSION_INT 0x000409
19 #define FFMPEG_VERSION "HEAD"
20
21 #define AV_STRINGIFY(s) AV_TOSTRING(s)
22 #define AV_TOSTRING(s) #s
23
24 #define LIBAVCODEC_VERSION_INT ((51<<16)+(9<<8)+0)
25 #define LIBAVCODEC_VERSION 51.9.0
26 #define LIBAVCODEC_BUILD LIBAVCODEC_VERSION_INT
27
28 #define LIBAVCODEC_IDENT "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
29
30 #define AV_NOPTS_VALUE int64_t_C(0x8000000000000000)
31 #define AV_TIME_BASE 1000000
32 #define AV_TIME_BASE_Q (AVRational){1, AV_TIME_BASE}
33
34 enum CodecID {
35 CODEC_ID_NONE,
36 CODEC_ID_MPEG1VIDEO,
37 CODEC_ID_MPEG2VIDEO, /* prefered ID for MPEG Video 1 or 2 decoding */
38 CODEC_ID_MPEG2VIDEO_XVMC,
39 CODEC_ID_H261,
40 CODEC_ID_H263,
41 CODEC_ID_RV10,
42 CODEC_ID_RV20,
43 CODEC_ID_MJPEG,
44 CODEC_ID_MJPEGB,
45 CODEC_ID_LJPEG,
46 CODEC_ID_SP5X,
47 CODEC_ID_JPEGLS,
48 CODEC_ID_MPEG4,
49 CODEC_ID_RAWVIDEO,
50 CODEC_ID_MSMPEG4V1,
51 CODEC_ID_MSMPEG4V2,
52 CODEC_ID_MSMPEG4V3,
53 CODEC_ID_WMV1,
54 CODEC_ID_WMV2,
55 CODEC_ID_H263P,
56 CODEC_ID_H263I,
57 CODEC_ID_FLV1,
58 CODEC_ID_SVQ1,
59 CODEC_ID_SVQ3,
60 CODEC_ID_DVVIDEO,
61 CODEC_ID_HUFFYUV,
62 CODEC_ID_CYUV,
63 CODEC_ID_H264,
64 CODEC_ID_INDEO3,
65 CODEC_ID_VP3,
66 CODEC_ID_THEORA,
67 CODEC_ID_ASV1,
68 CODEC_ID_ASV2,
69 CODEC_ID_FFV1,
70 CODEC_ID_4XM,
71 CODEC_ID_VCR1,
72 CODEC_ID_CLJR,
73 CODEC_ID_MDEC,
74 CODEC_ID_ROQ,
75 CODEC_ID_INTERPLAY_VIDEO,
76 CODEC_ID_XAN_WC3,
77 CODEC_ID_XAN_WC4,
78 CODEC_ID_RPZA,
79 CODEC_ID_CINEPAK,
80 CODEC_ID_WS_VQA,
81 CODEC_ID_MSRLE,
82 CODEC_ID_MSVIDEO1,
83 CODEC_ID_IDCIN,
84 CODEC_ID_8BPS,
85 CODEC_ID_SMC,
86 CODEC_ID_FLIC,
87 CODEC_ID_TRUEMOTION1,
88 CODEC_ID_VMDVIDEO,
89 CODEC_ID_MSZH,
90 CODEC_ID_ZLIB,
91 CODEC_ID_QTRLE,
92 CODEC_ID_SNOW,
93 CODEC_ID_TSCC,
94 CODEC_ID_ULTI,
95 CODEC_ID_QDRAW,
96 CODEC_ID_VIXL,
97 CODEC_ID_QPEG,
98 CODEC_ID_XVID,
99 CODEC_ID_PNG,
100 CODEC_ID_PPM,
101 CODEC_ID_PBM,
102 CODEC_ID_PGM,
103 CODEC_ID_PGMYUV,
104 CODEC_ID_PAM,
105 CODEC_ID_FFVHUFF,
106 CODEC_ID_RV30,
107 CODEC_ID_RV40,
108 CODEC_ID_VC9,
109 CODEC_ID_WMV3,
110 CODEC_ID_LOCO,
111 CODEC_ID_WNV1,
112 CODEC_ID_AASC,
113 CODEC_ID_INDEO2,
114 CODEC_ID_FRAPS,
115 CODEC_ID_TRUEMOTION2,
116 CODEC_ID_BMP,
117 CODEC_ID_CSCD,
118 CODEC_ID_MMVIDEO,
119 CODEC_ID_ZMBV,
120 CODEC_ID_AVS,
121 CODEC_ID_SMACKVIDEO,
122 CODEC_ID_NUV,
123 CODEC_ID_KMVC,
124 CODEC_ID_FLASHSV,
125
126 /* various pcm "codecs" */
127 CODEC_ID_PCM_S16LE= 0x10000,
128 CODEC_ID_PCM_S16BE,
129 CODEC_ID_PCM_U16LE,
130 CODEC_ID_PCM_U16BE,
131 CODEC_ID_PCM_S8,
132 CODEC_ID_PCM_U8,
133 CODEC_ID_PCM_MULAW,
134 CODEC_ID_PCM_ALAW,
135 CODEC_ID_PCM_S32LE,
136 CODEC_ID_PCM_S32BE,
137 CODEC_ID_PCM_U32LE,
138 CODEC_ID_PCM_U32BE,
139 CODEC_ID_PCM_S24LE,
140 CODEC_ID_PCM_S24BE,
141 CODEC_ID_PCM_U24LE,
142 CODEC_ID_PCM_U24BE,
143 CODEC_ID_PCM_S24DAUD,
144
145 /* various adpcm codecs */
146 CODEC_ID_ADPCM_IMA_QT= 0x11000,
147 CODEC_ID_ADPCM_IMA_WAV,
148 CODEC_ID_ADPCM_IMA_DK3,
149 CODEC_ID_ADPCM_IMA_DK4,
150 CODEC_ID_ADPCM_IMA_WS,
151 CODEC_ID_ADPCM_IMA_SMJPEG,
152 CODEC_ID_ADPCM_MS,
153 CODEC_ID_ADPCM_4XM,
154 CODEC_ID_ADPCM_XA,
155 CODEC_ID_ADPCM_ADX,
156 CODEC_ID_ADPCM_EA,
157 CODEC_ID_ADPCM_G726,
158 CODEC_ID_ADPCM_CT,
159 CODEC_ID_ADPCM_SWF,
160 CODEC_ID_ADPCM_YAMAHA,
161 CODEC_ID_ADPCM_SBPRO_4,
162 CODEC_ID_ADPCM_SBPRO_3,
163 CODEC_ID_ADPCM_SBPRO_2,
164
165 /* AMR */
166 CODEC_ID_AMR_NB= 0x12000,
167 CODEC_ID_AMR_WB,
168
169 /* RealAudio codecs*/
170 CODEC_ID_RA_144= 0x13000,
171 CODEC_ID_RA_288,
172
173 /* various DPCM codecs */
174 CODEC_ID_ROQ_DPCM= 0x14000,
175 CODEC_ID_INTERPLAY_DPCM,
176 CODEC_ID_XAN_DPCM,
177 CODEC_ID_SOL_DPCM,
178
179 CODEC_ID_MP2= 0x15000,
180 CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
181 CODEC_ID_AAC,
182 CODEC_ID_MPEG4AAC,
183 CODEC_ID_AC3,
184 CODEC_ID_DTS,
185 CODEC_ID_VORBIS,
186 CODEC_ID_DVAUDIO,
187 CODEC_ID_WMAV1,
188 CODEC_ID_WMAV2,
189 CODEC_ID_MACE3,
190 CODEC_ID_MACE6,
191 CODEC_ID_VMDAUDIO,
192 CODEC_ID_SONIC,
193 CODEC_ID_SONIC_LS,
194 CODEC_ID_FLAC,
195 CODEC_ID_MP3ADU,
196 CODEC_ID_MP3ON4,
197 CODEC_ID_SHORTEN,
198 CODEC_ID_ALAC,
199 CODEC_ID_WESTWOOD_SND1,
200 CODEC_ID_GSM,
201 CODEC_ID_QDM2,
202 CODEC_ID_COOK,
203 CODEC_ID_TRUESPEECH,
204 CODEC_ID_TTA,
205 CODEC_ID_SMACKAUDIO,
206
207 CODEC_ID_OGGTHEORA= 0x16000,
208
209 /* subtitle codecs */
210 CODEC_ID_DVD_SUBTITLE= 0x17000,
211 CODEC_ID_DVB_SUBTITLE,
212
213 CODEC_ID_MPEG2TS= 0x20000, /* _FAKE_ codec to indicate a raw MPEG2 transport
214 stream (only used by libavformat) */
215 };
216
217 /* CODEC_ID_MP3LAME is absolete */
218 #define CODEC_ID_MP3LAME CODEC_ID_MP3
219
220 enum CodecType {
221 CODEC_TYPE_UNKNOWN = -1,
222 CODEC_TYPE_VIDEO,
223 CODEC_TYPE_AUDIO,
224 CODEC_TYPE_DATA,
225 CODEC_TYPE_SUBTITLE,
226 };
227
228 /* currently unused, may be used if 24/32 bits samples ever supported */
229 /* all in native endian */
230 enum SampleFormat {
231 SAMPLE_FMT_NONE = -1,
232 SAMPLE_FMT_U8, ///< unsigned 8 bits
233 SAMPLE_FMT_S16, ///< signed 16 bits
234 SAMPLE_FMT_S24, ///< signed 24 bits
235 SAMPLE_FMT_S32, ///< signed 32 bits
236 SAMPLE_FMT_FLT, ///< float
237 };
238
239 /* in bytes */
240 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
241
242 /**
243 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
244 * this is mainly needed because some optimized bitstream readers read
245 * 32 or 64 bit at once and could read over the end<br>
246 * Note, if the first 23 bits of the additional bytes are not 0 then damaged
247 * MPEG bitstreams could cause overread and segfault
248 */
249 #define FF_INPUT_BUFFER_PADDING_SIZE 8
250
251 /**
252 * minimum encoding buffer size.
253 * used to avoid some checks during header writing
254 */
255 #define FF_MIN_BUFFER_SIZE 16384
256
257 /* motion estimation type, EPZS by default */
258 enum Motion_Est_ID {
259 ME_ZERO = 1,
260 ME_FULL,
261 ME_LOG,
262 ME_PHODS,
263 ME_EPZS,
264 ME_X1,
265 ME_HEX,
266 ME_UMH,
267 ME_ITER,
268 };
269
270 enum AVDiscard{
271 //we leave some space between them for extensions (drop some keyframes for intra only or drop just some bidir frames)
272 AVDISCARD_NONE =-16, ///< discard nothing
273 AVDISCARD_DEFAULT= 0, ///< discard useless packets like 0 size packets in avi
274 AVDISCARD_NONREF = 8, ///< discard all non reference
275 AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
276 AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
277 AVDISCARD_ALL = 48, ///< discard all
278 };
279
280 typedef struct RcOverride{
281 int start_frame;
282 int end_frame;
283 int qscale; // if this is 0 then quality_factor will be used instead
284 float quality_factor;
285 } RcOverride;
286
287 /* only for ME compatiblity with old apps */
288 extern int motion_estimation_method;
289
290 #define FF_MAX_B_FRAMES 16
291
292 /* encoding support
293 these flags can be passed in AVCodecContext.flags before initing
294 Note: not everything is supported yet.
295 */
296
297 #define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
298 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / Advanced prediction for H263
299 #define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
300 #define CODEC_FLAG_GMC 0x0020 ///< use GMC
301 #define CODEC_FLAG_MV0 0x0040 ///< always try a MB with MV=<0,0>
302 #define CODEC_FLAG_PART 0x0080 ///< use data partitioning
303 /* parent program gurantees that the input for b-frame containing streams is not written to
304 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
305 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
306 #define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
307 #define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
308 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
309 #define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
310 #define CODEC_FLAG_EMU_EDGE 0x4000///< don't draw edges
311 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
312 #define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
313 of only at frame boundaries */
314 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
315 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
316 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay
317 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
318 #define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
319 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
320 #define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
321 /* Fx : Flag for h263+ extra options */
322 #define CODEC_FLAG_H263P_AIC 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
323 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
324 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
325 #define CODEC_FLAG_CBP_RD 0x04000000 ///< use rate distortion optimization for cbp
326 #define CODEC_FLAG_QP_RD 0x08000000 ///< use rate distortion optimization for qp selectioon
327 #define CODEC_FLAG_H263P_AIV 0x00000008 ///< H263 Alternative inter vlc
328 #define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
329 #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
330 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
331 #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
332 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
333 #define CODEC_FLAG_CLOSED_GOP ((int)0x80000000)
334 #define CODEC_FLAG2_FAST 0x00000001 ///< allow non spec compliant speedup tricks
335 #define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< strictly enforce GOP size
336 #define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< skip bitstream encoding
337 #define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< place global headers at every keyframe instead of in extradata
338 #define CODEC_FLAG2_BPYRAMID 0x00000010 ///< H.264 allow b-frames to be used as references
339 #define CODEC_FLAG2_WPRED 0x00000020 ///< H.264 weighted biprediction for b-frames
340 #define CODEC_FLAG2_MIXED_REFS 0x00000040 ///< H.264 multiple references per partition
341 #define CODEC_FLAG2_8X8DCT 0x00000080 ///< H.264 high profile 8x8 transform
342 #define CODEC_FLAG2_FASTPSKIP 0x00000100 ///< H.264 fast pskip
343 #define CODEC_FLAG2_AUD 0x00000200 ///< H.264 access unit delimiters
344 #define CODEC_FLAG2_BRDO 0x00000400 ///< b-frame rate-distortion optimization
345 #define CODEC_FLAG2_INTRA_VLC 0x00000800 ///< use MPEG-2 intra VLC table
346 #define CODEC_FLAG2_MEMC_ONLY 0x00001000 ///< only do ME/MC (I frames -> ref, P frame -> ME+MC)
347
348 /* Unsupported options :
349 * Syntax Arithmetic coding (SAC)
350 * Reference Picture Selection
351 * Independant Segment Decoding */
352 /* /Fx */
353 /* codec capabilities */
354
355 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
356 /**
357 * Codec uses get_buffer() for allocating buffers.
358 * direct rendering method 1
359 */
360 #define CODEC_CAP_DR1 0x0002
361 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
362 used */
363 #define CODEC_CAP_PARSE_ONLY 0x0004
364 #define CODEC_CAP_TRUNCATED 0x0008
365 /* codec can export data for HW decoding (XvMC) */
366 #define CODEC_CAP_HWACCEL 0x0010
367 /**
368 * codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data.
369 * if this is not set, the codec is guranteed to never be feeded with NULL data
370 */
371 #define CODEC_CAP_DELAY 0x0020
372
373 //the following defines may change, don't expect compatibility if you use them
374 #define MB_TYPE_INTRA4x4 0x0001
375 #define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
376 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME h264 specific
377 #define MB_TYPE_16x16 0x0008
378 #define MB_TYPE_16x8 0x0010
379 #define MB_TYPE_8x16 0x0020
380 #define MB_TYPE_8x8 0x0040
381 #define MB_TYPE_INTERLACED 0x0080
382 #define MB_TYPE_DIRECT2 0x0100 //FIXME
383 #define MB_TYPE_ACPRED 0x0200
384 #define MB_TYPE_GMC 0x0400
385 #define MB_TYPE_SKIP 0x0800
386 #define MB_TYPE_P0L0 0x1000
387 #define MB_TYPE_P1L0 0x2000
388 #define MB_TYPE_P0L1 0x4000
389 #define MB_TYPE_P1L1 0x8000
390 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
391 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
392 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
393 #define MB_TYPE_QUANT 0x00010000
394 #define MB_TYPE_CBP 0x00020000
395 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
396
397 /**
398 * Pan Scan area.
399 * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
400 */
401 typedef struct AVPanScan{
402 /**
403 * id.
404 * - encoding: set by user.
405 * - decoding: set by lavc
406 */
407 int id;
408
409 /**
410 * width and height in 1/16 pel
411 * - encoding: set by user.
412 * - decoding: set by lavc
413 */
414 int width;
415 int height;
416
417 /**
418 * position of the top left corner in 1/16 pel for up to 3 fields/frames.
419 * - encoding: set by user.
420 * - decoding: set by lavc
421 */
422 int16_t position[3][2];
423 }AVPanScan;
424
425 #define FF_COMMON_FRAME \
426 /**\
427 * pointer to the picture planes.\
428 * this might be different from the first allocated byte\
429 * - encoding: \
430 * - decoding: \
431 */\
432 uint8_t *data[4];\
433 int linesize[4];\
434 /**\
435 * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
436 * this isn't used by lavc unless the default get/release_buffer() is used\
437 * - encoding: \
438 * - decoding: \
439 */\
440 uint8_t *base[4];\
441 /**\
442 * 1 -> keyframe, 0-> not\
443 * - encoding: set by lavc\
444 * - decoding: set by lavc\
445 */\
446 int key_frame;\
447 \
448 /**\
449 * picture type of the frame, see ?_TYPE below.\
450 * - encoding: set by lavc for coded_picture (and set by user for input)\
451 * - decoding: set by lavc\
452 */\
453 int pict_type;\
454 \
455 /**\
456 * presentation timestamp in time_base units (time when frame should be shown to user)\
457 * if AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed\
458 * - encoding: MUST be set by user\
459 * - decoding: set by lavc\
460 */\
461 int64_t pts;\
462 \
463 /**\
464 * picture number in bitstream order.\
465 * - encoding: set by\
466 * - decoding: set by lavc\
467 */\
468 int coded_picture_number;\
469 /**\
470 * picture number in display order.\
471 * - encoding: set by\
472 * - decoding: set by lavc\
473 */\
474 int display_picture_number;\
475 \
476 /**\
477 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
478 * - encoding: set by lavc for coded_picture (and set by user for input)\
479 * - decoding: set by lavc\
480 */\
481 int quality; \
482 \
483 /**\
484 * buffer age (1->was last buffer and dint change, 2->..., ...).\
485 * set to INT_MAX if the buffer has not been used yet \
486 * - encoding: unused\
487 * - decoding: MUST be set by get_buffer()\
488 */\
489 int age;\
490 \
491 /**\
492 * is this picture used as reference\
493 * - encoding: unused\
494 * - decoding: set by lavc (before get_buffer() call))\
495 */\
496 int reference;\
497 \
498 /**\
499 * QP table\
500 * - encoding: unused\
501 * - decoding: set by lavc\
502 */\
503 int8_t *qscale_table;\
504 /**\
505 * QP store stride\
506 * - encoding: unused\
507 * - decoding: set by lavc\
508 */\
509 int qstride;\
510 \
511 /**\
512 * mbskip_table[mb]>=1 if MB didnt change\
513 * stride= mb_width = (width+15)>>4\
514 * - encoding: unused\
515 * - decoding: set by lavc\
516 */\
517 uint8_t *mbskip_table;\
518 \
519 /**\
520 * Motion vector table.\
521 * @code\
522 * example:\
523 * int mv_sample_log2= 4 - motion_subsample_log2;\
524 * int mb_width= (width+15)>>4;\
525 * int mv_stride= (mb_width << mv_sample_log2) + 1;\
526 * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
527 * @endcode\
528 * - encoding: set by user\
529 * - decoding: set by lavc\
530 */\
531 int16_t (*motion_val[2])[2];\
532 \
533 /**\
534 * Macroblock type table\
535 * mb_type_base + mb_width + 2\
536 * - encoding: set by user\
537 * - decoding: set by lavc\
538 */\
539 uint32_t *mb_type;\
540 \
541 /**\
542 * log2 of the size of the block which a single vector in motion_val represents: \
543 * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
544 * - encoding: unused\
545 * - decoding: set by lavc\
546 */\
547 uint8_t motion_subsample_log2;\
548 \
549 /**\
550 * for some private data of the user\
551 * - encoding: unused\
552 * - decoding: set by user\
553 */\
554 void *opaque;\
555 \
556 /**\
557 * error\
558 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
559 * - decoding: unused\
560 */\
561 uint64_t error[4];\
562 \
563 /**\
564 * type of the buffer (to keep track of who has to dealloc data[*])\
565 * - encoding: set by the one who allocs it\
566 * - decoding: set by the one who allocs it\
567 * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
568 */\
569 int type;\
570 \
571 /**\
572 * when decoding, this signal how much the picture must be delayed.\
573 * extra_delay = repeat_pict / (2*fps)\
574 * - encoding: unused\
575 * - decoding: set by lavc\
576 */\
577 int repeat_pict;\
578 \
579 /**\
580 * \
581 */\
582 int qscale_type;\
583 \
584 /**\
585 * The content of the picture is interlaced.\
586 * - encoding: set by user\
587 * - decoding: set by lavc (default 0)\
588 */\
589 int interlaced_frame;\
590 \
591 /**\
592 * if the content is interlaced, is top field displayed first.\
593 * - encoding: set by user\
594 * - decoding: set by lavc\
595 */\
596 int top_field_first;\
597 \
598 /**\
599 * Pan scan.\
600 * - encoding: set by user\
601 * - decoding: set by lavc\
602 */\
603 AVPanScan *pan_scan;\
604 \
605 /**\
606 * tell user application that palette has changed from previous frame.\
607 * - encoding: ??? (no palette-enabled encoder yet)\
608 * - decoding: set by lavc (default 0)\
609 */\
610 int palette_has_changed;\
611 \
612 /**\
613 * Codec suggestion on buffer type if != 0\
614 * - encoding: unused\
615 * - decoding: set by lavc (before get_buffer() call))\
616 */\
617 int buffer_hints;\
618 \
619 /**\
620 * DCT coeffitients\
621 * - encoding: unused\
622 * - decoding: set by lavc\
623 */\
624 short *dct_coeff;\
625 \
626 /**\
627 * Motion referece frame index\
628 * - encoding: set by user\
629 * - decoding: set by lavc\
630 */\
631 int8_t *ref_index[2];
632
633 #define FF_QSCALE_TYPE_MPEG1 0
634 #define FF_QSCALE_TYPE_MPEG2 1
635 #define FF_QSCALE_TYPE_H264 2
636
637 #define FF_BUFFER_TYPE_INTERNAL 1
638 #define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
639 #define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewhere else, don't dealloc image (data/base), all other tables are not shared
640 #define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, don't dealloc anything
641
642
643 #define FF_I_TYPE 1 // Intra
644 #define FF_P_TYPE 2 // Predicted
645 #define FF_B_TYPE 3 // Bi-dir predicted
646 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
647 #define FF_SI_TYPE 5
648 #define FF_SP_TYPE 6
649
650 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore)
651 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
652 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
653 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
654
655 /**
656 * Audio Video Frame.
657 */
658 typedef struct AVFrame {
659 FF_COMMON_FRAME
660 } AVFrame;
661
662 #define DEFAULT_FRAME_RATE_BASE 1001000
663
664 /**
665 * Used by av_log
666 */
667 typedef struct AVCLASS AVClass;
668 struct AVCLASS {
669 const char* class_name;
670 const char* (*item_name)(void*); /* actually passing a pointer to an AVCodecContext
671 or AVFormatContext, which begin with an AVClass.
672 Needed because av_log is in libavcodec and has no visibility
673 of AVIn/OutputFormat */
674 struct AVOption *option;
675 };
676
677 /**
678 * main external api structure.
679 */
680 typedef struct AVCodecContext {
681 /**
682 * Info on struct for av_log
683 * - set by avcodec_alloc_context
684 */
685 AVClass *av_class;
686 /**
687 * the average bitrate.
688 * - encoding: set by user. unused for constant quantizer encoding
689 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
690 */
691 int bit_rate;
692
693 /**
694 * number of bits the bitstream is allowed to diverge from the reference.
695 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
696 * - encoding: set by user. unused for constant quantizer encoding
697 * - decoding: unused
698 */
699 int bit_rate_tolerance;
700
701 /**
702 * CODEC_FLAG_*.
703 * - encoding: set by user.
704 * - decoding: set by user.
705 */
706 int flags;
707
708 /**
709 * some codecs needs additionnal format info. It is stored here
710 * - encoding: set by user.
711 * - decoding: set by lavc. (FIXME is this ok?)
712 */
713 int sub_id;
714
715 /**
716 * motion estimation algorithm used for video coding.
717 * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
718 * 8 (umh), 9 (iter) [7, 8 are x264 specific, 9 is snow specific]
719 * - encoding: MUST be set by user.
720 * - decoding: unused
721 */
722 int me_method;
723
724 /**
725 * some codecs need / can use extra-data like huffman tables.
726 * mjpeg: huffman tables
727 * rv10: additional flags
728 * mpeg4: global headers (they can be in the bitstream or here)
729 * the allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
730 * then extradata_size to avoid prolems if its read with the bitstream reader
731 * the bytewise contents of extradata must not depend on the architecture or cpu endianness
732 * - encoding: set/allocated/freed by lavc.
733 * - decoding: set/allocated/freed by user.
734 */
735 void *extradata;
736 int extradata_size;
737
738 /**
739 * this is the fundamental unit of time (in seconds) in terms
740 * of which frame timestamps are represented. for fixed-fps content,
741 * timebase should be 1/framerate and timestamp increments should be
742 * identically 1.
743 * - encoding: MUST be set by user
744 * - decoding: set by lavc.
745 */
746 AVRational time_base;
747
748 /* video only */
749 /**
750 * picture width / height.
751 * - encoding: MUST be set by user.
752 * - decoding: set by lavc.
753 * Note, for compatibility its possible to set this instead of
754 * coded_width/height before decoding
755 */
756 int width, height;
757
758 #define FF_ASPECT_EXTENDED 15
759
760 /**
761 * the number of pictures in a group of pitures, or 0 for intra_only.
762 * - encoding: set by user.
763 * - decoding: unused
764 */
765 int gop_size;
766
767 /**
768 * pixel format, see PIX_FMT_xxx.
769 * - encoding: set by user.
770 * - decoding: set by lavc.
771 */
772 enum PixelFormat pix_fmt;
773
774 /**
775 * Frame rate emulation. If not zero lower layer (i.e. format handler)
776 * has to read frames at native frame rate.
777 * - encoding: set by user.
778 * - decoding: unused.
779 */
780 int rate_emu;
781
782 /**
783 * if non NULL, 'draw_horiz_band' is called by the libavcodec
784 * decoder to draw an horizontal band. It improve cache usage. Not
785 * all codecs can do that. You must check the codec capabilities
786 * before
787 * - encoding: unused
788 * - decoding: set by user.
789 * @param height the height of the slice
790 * @param y the y position of the slice
791 * @param type 1->top field, 2->bottom field, 3->frame
792 * @param offset offset into the AVFrame.data from which the slice should be read
793 */
794 void (*draw_horiz_band)(struct AVCodecContext *s,
795 const AVFrame *src, int offset[4],
796 int y, int type, int height);
797
798 /* audio only */
799 int sample_rate; ///< samples per sec
800 int channels;
801
802 /**
803 * audio sample format.
804 * - encoding: set by user.
805 * - decoding: set by lavc.
806 */
807 enum SampleFormat sample_fmt; ///< sample format, currenly unused
808
809 /* the following data should not be initialized */
810 /**
811 * samples per packet. initialized when calling 'init'
812 */
813 int frame_size;
814 int frame_number; ///< audio or video frame number
815 int real_pict_num; ///< returns the real picture number of previous encoded frame
816
817 /**
818 * number of frames the decoded output will be delayed relative to
819 * the encoded input.
820 * - encoding: set by lavc.
821 * - decoding: unused
822 */
823 int delay;
824
825 /* - encoding parameters */
826 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
827 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
828
829 /**
830 * minimum quantizer.
831 * - encoding: set by user.
832 * - decoding: unused
833 */
834 int qmin;
835
836 /**
837 * maximum quantizer.
838 * - encoding: set by user.
839 * - decoding: unused
840 */
841 int qmax;
842
843 /**
844 * maximum quantizer difference etween frames.
845 * - encoding: set by user.
846 * - decoding: unused
847 */
848 int max_qdiff;
849
850 /**
851 * maximum number of b frames between non b frames.
852 * note: the output will be delayed by max_b_frames+1 relative to the input
853 * - encoding: set by user.
854 * - decoding: unused
855 */
856 int max_b_frames;
857
858 /**
859 * qscale factor between ip and b frames.
860 * - encoding: set by user.
861 * - decoding: unused
862 */
863 float b_quant_factor;
864
865 /** obsolete FIXME remove */
866 int rc_strategy;
867 #define FF_RC_STRATEGY_XVID 1
868
869 int b_frame_strategy;
870
871 /**
872 * hurry up amount.
873 * deprecated in favor of skip_idct and skip_frame
874 * - encoding: unused
875 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
876 */
877 int hurry_up;
878
879 struct AVCodec *codec;
880
881 void *priv_data;
882
883 /* unused, FIXME remove*/
884 int rtp_mode;
885
886 int rtp_payload_size; /* The size of the RTP payload: the coder will */
887 /* do it's best to deliver a chunk with size */
888 /* below rtp_payload_size, the chunk will start */
889 /* with a start code on some codecs like H.263 */
890 /* This doesn't take account of any particular */
891 /* headers inside the transmited RTP payload */
892
893
894 /* The RTP callback: This function is called */
895 /* every time the encoder has a packet to send */
896 /* Depends on the encoder if the data starts */
897 /* with a Start Code (it should) H.263 does. */
898 /* mb_nb contains the number of macroblocks */
899 /* encoded in the RTP payload */
900 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
901
902 /* statistics, used for 2-pass encoding */
903 int mv_bits;
904 int header_bits;
905 int i_tex_bits;
906 int p_tex_bits;
907 int i_count;
908 int p_count;
909 int skip_count;
910 int misc_bits;
911
912 /**
913 * number of bits used for the previously encoded frame.
914 * - encoding: set by lavc
915 * - decoding: unused
916 */
917 int frame_bits;
918
919 /**
920 * private data of the user, can be used to carry app specific stuff.
921 * - encoding: set by user
922 * - decoding: set by user
923 */
924 void *opaque;
925
926 char codec_name[32];
927 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
928 enum CodecID codec_id; /* see CODEC_ID_xxx */
929
930 /**
931 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
932 * this is used to workaround some encoder bugs
933 * - encoding: set by user, if not then the default based on codec_id will be used
934 * - decoding: set by user, will be converted to upper case by lavc during init
935 */
936 unsigned int codec_tag;
937
938 /**
939 * workaround bugs in encoders which sometimes cannot be detected automatically.
940 * - encoding: set by user
941 * - decoding: set by user
942 */
943 int workaround_bugs;
944 #define FF_BUG_AUTODETECT 1 ///< autodetection
945 #define FF_BUG_OLD_MSMPEG4 2
946 #define FF_BUG_XVID_ILACE 4
947 #define FF_BUG_UMP4 8
948 #define FF_BUG_NO_PADDING 16
949 #define FF_BUG_AMV 32
950 #define FF_BUG_AC_VLC 0 ///< will be removed, libavcodec can now handle these non compliant files by default
951 #define FF_BUG_QPEL_CHROMA 64
952 #define FF_BUG_STD_QPEL 128
953 #define FF_BUG_QPEL_CHROMA2 256
954 #define FF_BUG_DIRECT_BLOCKSIZE 512
955 #define FF_BUG_EDGE 1024
956 #define FF_BUG_HPEL_CHROMA 2048
957 #define FF_BUG_DC_CLIP 4096
958 #define FF_BUG_MS 8192 ///< workaround various bugs in microsofts broken decoders
959 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
960
961 /**
962 * luma single coeff elimination threshold.
963 * - encoding: set by user
964 * - decoding: unused
965 */
966 int luma_elim_threshold;
967
968 /**
969 * chroma single coeff elimination threshold.
970 * - encoding: set by user
971 * - decoding: unused
972 */
973 int chroma_elim_threshold;
974
975 /**
976 * strictly follow the std (MPEG4, ...).
977 * - encoding: set by user
978 * - decoding: unused
979 */
980 int strict_std_compliance;
981 #define FF_COMPLIANCE_VERY_STRICT 2 ///< strictly conform to a older more strict version of the spec or reference software
982 #define FF_COMPLIANCE_STRICT 1 ///< strictly conform to all the things in the spec no matter what consequences
983 #define FF_COMPLIANCE_NORMAL 0
984 #define FF_COMPLIANCE_INOFFICIAL -1 ///< allow inofficial extensions
985 #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< allow non standarized experimental things
986
987 /**
988 * qscale offset between ip and b frames.
989 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
990 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
991 * - encoding: set by user.
992 * - decoding: unused
993 */
994 float b_quant_offset;
995
996 /**
997 * error resilience higher values will detect more errors but may missdetect
998 * some more or less valid parts as errors.
999 * - encoding: unused
1000 * - decoding: set by user
1001 */
1002 int error_resilience;
1003 #define FF_ER_CAREFUL 1
1004 #define FF_ER_COMPLIANT 2
1005 #define FF_ER_AGGRESSIVE 3
1006 #define FF_ER_VERY_AGGRESSIVE 4
1007
1008 /**
1009 * called at the beginning of each frame to get a buffer for it.
1010 * if pic.reference is set then the frame will be read later by lavc
1011 * avcodec_align_dimensions() should be used to find the required width and
1012 * height, as they normally need to be rounded up to the next multiple of 16
1013 * - encoding: unused
1014 * - decoding: set by lavc, user can override
1015 */
1016 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1017
1018 /**
1019 * called to release buffers which where allocated with get_buffer.
1020 * a released buffer can be reused in get_buffer()
1021 * pic.data[*] must be set to NULL
1022 * - encoding: unused
1023 * - decoding: set by lavc, user can override
1024 */
1025 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1026
1027 /**
1028 * if 1 the stream has a 1 frame delay during decoding.
1029 * - encoding: set by lavc
1030 * - decoding: set by lavc
1031 */
1032 int has_b_frames;
1033
1034 /**
1035 * number of bytes per packet if constant and known or 0
1036 * used by some WAV based audio codecs
1037 */
1038 int block_align;
1039
1040 int parse_only; /* - decoding only: if true, only parsing is done
1041 (function avcodec_parse_frame()). The frame
1042 data is returned. Only MPEG codecs support this now. */
1043
1044 /**
1045 * 0-> h263 quant 1-> mpeg quant.
1046 * - encoding: set by user.
1047 * - decoding: unused
1048 */
1049 int mpeg_quant;
1050
1051 /**
1052 * pass1 encoding statistics output buffer.
1053 * - encoding: set by lavc
1054 * - decoding: unused
1055 */
1056 char *stats_out;
1057
1058 /**
1059 * pass2 encoding statistics input buffer.
1060 * concatenated stuff from stats_out of pass1 should be placed here
1061 * - encoding: allocated/set/freed by user
1062 * - decoding: unused
1063 */
1064 char *stats_in;
1065
1066 /**
1067 * ratecontrol qmin qmax limiting method.
1068 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
1069 * - encoding: set by user.
1070 * - decoding: unused
1071 */
1072 float rc_qsquish;
1073
1074 float rc_qmod_amp;
1075 int rc_qmod_freq;
1076
1077 /**
1078 * ratecontrol override, see RcOverride.
1079 * - encoding: allocated/set/freed by user.
1080 * - decoding: unused
1081 */
1082 RcOverride *rc_override;
1083 int rc_override_count;
1084
1085 /**
1086 * rate control equation.
1087 * - encoding: set by user
1088 * - decoding: unused
1089 */
1090 char *rc_eq;
1091
1092 /**
1093 * maximum bitrate.
1094 * - encoding: set by user.
1095 * - decoding: unused
1096 */
1097 int rc_max_rate;
1098
1099 /**
1100 * minimum bitrate.
1101 * - encoding: set by user.
1102 * - decoding: unused
1103 */
1104 int rc_min_rate;
1105
1106 /**
1107 * decoder bitstream buffer size.
1108 * - encoding: set by user.
1109 * - decoding: unused
1110 */
1111 int rc_buffer_size;
1112 float rc_buffer_aggressivity;
1113
1114 /**
1115 * qscale factor between p and i frames.
1116 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1117 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1118 * - encoding: set by user.
1119 * - decoding: unused
1120 */
1121 float i_quant_factor;
1122
1123 /**
1124 * qscale offset between p and i frames.
1125 * - encoding: set by user.
1126 * - decoding: unused
1127 */
1128 float i_quant_offset;
1129
1130 /**
1131 * initial complexity for pass1 ratecontrol.
1132 * - encoding: set by user.
1133 * - decoding: unused
1134 */
1135 float rc_initial_cplx;
1136
1137 /**
1138 * dct algorithm, see FF_DCT_* below.
1139 * - encoding: set by user
1140 * - decoding: unused
1141 */
1142 int dct_algo;
1143 #define FF_DCT_AUTO 0
1144 #define FF_DCT_FASTINT 1
1145 #define FF_DCT_INT 2
1146 #define FF_DCT_MMX 3
1147 #define FF_DCT_MLIB 4
1148 #define FF_DCT_ALTIVEC 5
1149 #define FF_DCT_FAAN 6
1150
1151 /**
1152 * luminance masking (0-> disabled).
1153 * - encoding: set by user
1154 * - decoding: unused
1155 */
1156 float lumi_masking;
1157
1158 /**
1159 * temporary complexity masking (0-> disabled).
1160 * - encoding: set by user
1161 * - decoding: unused
1162 */
1163 float temporal_cplx_masking;
1164
1165 /**
1166 * spatial complexity masking (0-> disabled).
1167 * - encoding: set by user
1168 * - decoding: unused
1169 */
1170 float spatial_cplx_masking;
1171
1172 /**
1173 * p block masking (0-> disabled).
1174 * - encoding: set by user
1175 * - decoding: unused
1176 */
1177 float p_masking;
1178
1179 /**
1180 * darkness masking (0-> disabled).
1181 * - encoding: set by user
1182 * - decoding: unused
1183 */
1184 float dark_masking;
1185
1186
1187 /* for binary compatibility */
1188 int unused;
1189
1190 /**
1191 * idct algorithm, see FF_IDCT_* below.
1192 * - encoding: set by user
1193 * - decoding: set by user
1194 */
1195 int idct_algo;
1196 #define FF_IDCT_AUTO 0
1197 #define FF_IDCT_INT 1
1198 #define FF_IDCT_SIMPLE 2
1199 #define FF_IDCT_SIMPLEMMX 3
1200 #define FF_IDCT_LIBMPEG2MMX 4
1201 #define FF_IDCT_PS2 5
1202 #define FF_IDCT_MLIB 6
1203 #define FF_IDCT_ARM 7
1204 #define FF_IDCT_ALTIVEC 8
1205 #define FF_IDCT_SH4 9
1206 #define FF_IDCT_SIMPLEARM 10
1207 #define FF_IDCT_H264 11
1208 #define FF_IDCT_VP3 12
1209 #define FF_IDCT_IPP 13
1210 #define FF_IDCT_XVIDMMX 14
1211
1212 /**
1213 * slice count.
1214 * - encoding: set by lavc
1215 * - decoding: set by user (or 0)
1216 */
1217 int slice_count;
1218 /**
1219 * slice offsets in the frame in bytes.
1220 * - encoding: set/allocated by lavc
1221 * - decoding: set/allocated by user (or NULL)
1222 */
1223 int *slice_offset;
1224
1225 /**
1226 * error concealment flags.
1227 * - encoding: unused
1228 * - decoding: set by user
1229 */
1230 int error_concealment;
1231 #define FF_EC_GUESS_MVS 1
1232 #define FF_EC_DEBLOCK 2
1233
1234 /**
1235 * dsp_mask could be add used to disable unwanted CPU features
1236 * CPU features (i.e. MMX, SSE. ...)
1237 *
1238 * with FORCE flag you may instead enable given CPU features
1239 * (Dangerous: usable in case of misdetection, improper usage however will
1240 * result into program crash)
1241 */
1242 unsigned dsp_mask;
1243 #define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
1244 /* lower 16 bits - CPU features */
1245 #ifdef HAVE_MMX
1246 #define FF_MM_MMX 0x0001 /* standard MMX */
1247 #define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
1248 #define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
1249 #define FF_MM_SSE 0x0008 /* SSE functions */
1250 #define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
1251 #define FF_MM_3DNOWEXT 0x0020 /* AMD 3DNowExt */
1252 #endif /* HAVE_MMX */
1253 #ifdef HAVE_IWMMXT
1254 #define FF_MM_IWMMXT 0x0100 /* XScale IWMMXT */
1255 #endif /* HAVE_IWMMXT */
1256
1257 /**
1258 * bits per sample/pixel from the demuxer (needed for huffyuv).
1259 * - encoding: set by lavc
1260 * - decoding: set by user
1261 */
1262 int bits_per_sample;
1263
1264 /**
1265 * prediction method (needed for huffyuv).
1266 * - encoding: set by user
1267 * - decoding: unused
1268 */
1269 int prediction_method;
1270 #define FF_PRED_LEFT 0
1271 #define FF_PRED_PLANE 1
1272 #define FF_PRED_MEDIAN 2
1273
1274 /**
1275 * sample aspect ratio (0 if unknown).
1276 * numerator and denominator must be relative prime and smaller then 256 for some video standards
1277 * - encoding: set by user.
1278 * - decoding: set by lavc.
1279 */
1280 AVRational sample_aspect_ratio;
1281
1282 /**
1283 * the picture in the bitstream.
1284 * - encoding: set by lavc
1285 * - decoding: set by lavc
1286 */
1287 AVFrame *coded_frame;
1288
1289 /**
1290 * debug.
1291 * - encoding: set by user.
1292 * - decoding: set by user.
1293 */
1294 int debug;
1295 #define FF_DEBUG_PICT_INFO 1
1296 #define FF_DEBUG_RC 2
1297 #define FF_DEBUG_BITSTREAM 4
1298 #define FF_DEBUG_MB_TYPE 8
1299 #define FF_DEBUG_QP 16
1300 #define FF_DEBUG_MV 32
1301 #define FF_DEBUG_DCT_COEFF 0x00000040
1302 #define FF_DEBUG_SKIP 0x00000080
1303 #define FF_DEBUG_STARTCODE 0x00000100
1304 #define FF_DEBUG_PTS 0x00000200
1305 #define FF_DEBUG_ER 0x00000400
1306 #define FF_DEBUG_MMCO 0x00000800
1307 #define FF_DEBUG_BUGS 0x00001000
1308 #define FF_DEBUG_VIS_QP 0x00002000
1309 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1310
1311 /**
1312 * debug.
1313 * - encoding: set by user.
1314 * - decoding: set by user.
1315 */
1316 int debug_mv;
1317 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1318 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1319 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1320
1321 /**
1322 * error.
1323 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1324 * - decoding: unused
1325 */
1326 uint64_t error[4];
1327
1328 /**
1329 * minimum MB quantizer.
1330 * - encoding: unused
1331 * - decoding: unused
1332 */
1333 int mb_qmin;
1334
1335 /**
1336 * maximum MB quantizer.
1337 * - encoding: unused
1338 * - decoding: unused
1339 */
1340 int mb_qmax;
1341
1342 /**
1343 * motion estimation compare function.
1344 * - encoding: set by user.
1345 * - decoding: unused
1346 */
1347 int me_cmp;
1348 /**
1349 * subpixel motion estimation compare function.
1350 * - encoding: set by user.
1351 * - decoding: unused
1352 */
1353 int me_sub_cmp;
1354 /**
1355 * macroblock compare function (not supported yet).
1356 * - encoding: set by user.
1357 * - decoding: unused
1358 */
1359 int mb_cmp;
1360 /**
1361 * interlaced dct compare function
1362 * - encoding: set by user.
1363 * - decoding: unused
1364 */
1365 int ildct_cmp;
1366 #define FF_CMP_SAD 0
1367 #define FF_CMP_SSE 1
1368 #define FF_CMP_SATD 2
1369 #define FF_CMP_DCT 3
1370 #define FF_CMP_PSNR 4
1371 #define FF_CMP_BIT 5
1372 #define FF_CMP_RD 6
1373 #define FF_CMP_ZERO 7
1374 #define FF_CMP_VSAD 8
1375 #define FF_CMP_VSSE 9
1376 #define FF_CMP_NSSE 10
1377 #define FF_CMP_W53 11
1378 #define FF_CMP_W97 12
1379 #define FF_CMP_DCTMAX 13
1380 #define FF_CMP_DCT264 14
1381 #define FF_CMP_CHROMA 256
1382
1383 /**
1384 * ME diamond size & shape.
1385 * - encoding: set by user.
1386 * - decoding: unused
1387 */
1388 int dia_size;
1389
1390 /**
1391 * amount of previous MV predictors (2a+1 x 2a+1 square).
1392 * - encoding: set by user.
1393 * - decoding: unused
1394 */
1395 int last_predictor_count;
1396
1397 /**
1398 * pre pass for motion estimation.
1399 * - encoding: set by user.
1400 * - decoding: unused
1401 */
1402 int pre_me;
1403
1404 /**
1405 * motion estimation pre pass compare function.
1406 * - encoding: set by user.
1407 * - decoding: unused
1408 */
1409 int me_pre_cmp;
1410
1411 /**
1412 * ME pre pass diamond size & shape.
1413 * - encoding: set by user.
1414 * - decoding: unused
1415 */
1416 int pre_dia_size;
1417
1418 /**
1419 * subpel ME quality.
1420 * - encoding: set by user.
1421 * - decoding: unused
1422 */
1423 int me_subpel_quality;
1424
1425 /**
1426 * callback to negotiate the pixelFormat.
1427 * @param fmt is the list of formats which are supported by the codec,
1428 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1429 * the first is allways the native one
1430 * @return the choosen format
1431 * - encoding: unused
1432 * - decoding: set by user, if not set then the native format will always be choosen
1433 */
1434 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1435
1436 /**
1437 * DTG active format information (additionnal aspect ratio
1438 * information only used in DVB MPEG2 transport streams). 0 if
1439 * not set.
1440 *
1441 * - encoding: unused.
1442 * - decoding: set by decoder
1443 */
1444 int dtg_active_format;
1445 #define FF_DTG_AFD_SAME 8
1446 #define FF_DTG_AFD_4_3 9
1447 #define FF_DTG_AFD_16_9 10
1448 #define FF_DTG_AFD_14_9 11
1449 #define FF_DTG_AFD_4_3_SP_14_9 13
1450 #define FF_DTG_AFD_16_9_SP_14_9 14
1451 #define FF_DTG_AFD_SP_4_3 15
1452
1453 /**
1454 * Maximum motion estimation search range in subpel units.
1455 * if 0 then no limit
1456 *
1457 * - encoding: set by user.
1458 * - decoding: unused.
1459 */
1460 int me_range;
1461
1462 /**
1463 * intra quantizer bias.
1464 * - encoding: set by user.
1465 * - decoding: unused
1466 */
1467 int intra_quant_bias;
1468 #define FF_DEFAULT_QUANT_BIAS 999999
1469
1470 /**
1471 * inter quantizer bias.
1472 * - encoding: set by user.
1473 * - decoding: unused
1474 */
1475 int inter_quant_bias;
1476
1477 /**
1478 * color table ID.
1479 * - encoding: unused.
1480 * - decoding: which clrtable should be used for 8bit RGB images
1481 * table have to be stored somewhere FIXME
1482 */
1483 int color_table_id;
1484
1485 /**
1486 * internal_buffer count.
1487 * Don't touch, used by lavc default_get_buffer()
1488 */
1489 int internal_buffer_count;
1490
1491 /**
1492 * internal_buffers.
1493 * Don't touch, used by lavc default_get_buffer()
1494 */
1495 void *internal_buffer;
1496
1497 #define FF_LAMBDA_SHIFT 7
1498 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1499 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1500 #define FF_LAMBDA_MAX (256*128-1)
1501
1502 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1503 /**
1504 * global quality for codecs which cannot change it per frame.
1505 * this should be proportional to MPEG1/2/4 qscale.
1506 * - encoding: set by user.
1507 * - decoding: unused
1508 */
1509 int global_quality;
1510
1511 #define FF_CODER_TYPE_VLC 0
1512 #define FF_CODER_TYPE_AC 1
1513 /**
1514 * coder type
1515 * - encoding: set by user.
1516 * - decoding: unused
1517 */
1518 int coder_type;
1519
1520 /**
1521 * context model
1522 * - encoding: set by user.
1523 * - decoding: unused
1524 */
1525 int context_model;
1526 #if 0
1527 /**
1528 *
1529 * - encoding: unused
1530 * - decoding: set by user.
1531 */
1532 uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1533 #endif
1534
1535 /**
1536 * slice flags
1537 * - encoding: unused
1538 * - decoding: set by user.
1539 */
1540 int slice_flags;
1541 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1542 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1543 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1544
1545 /**
1546 * XVideo Motion Acceleration
1547 * - encoding: forbidden
1548 * - decoding: set by decoder
1549 */
1550 int xvmc_acceleration;
1551
1552 /**
1553 * macroblock decision mode
1554 * - encoding: set by user.
1555 * - decoding: unused
1556 */
1557 int mb_decision;
1558 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1559 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1560 #define FF_MB_DECISION_RD 2 ///< rate distoration
1561
1562 /**
1563 * custom intra quantization matrix
1564 * - encoding: set by user, can be NULL
1565 * - decoding: set by lavc
1566 */
1567 uint16_t *intra_matrix;
1568
1569 /**
1570 * custom inter quantization matrix
1571 * - encoding: set by user, can be NULL
1572 * - decoding: set by lavc
1573 */
1574 uint16_t *inter_matrix;
1575
1576 /**
1577 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1578 * this is used to workaround some encoder bugs
1579 * - encoding: unused
1580 * - decoding: set by user, will be converted to upper case by lavc during init
1581 */
1582 unsigned int stream_codec_tag;
1583
1584 /**
1585 * scene change detection threshold.
1586 * 0 is default, larger means fewer detected scene changes
1587 * - encoding: set by user.
1588 * - decoding: unused
1589 */
1590 int scenechange_threshold;
1591
1592 /**
1593 * minimum lagrange multipler
1594 * - encoding: set by user.
1595 * - decoding: unused
1596 */
1597 int lmin;
1598
1599 /**
1600 * maximum lagrange multipler
1601 * - encoding: set by user.
1602 * - decoding: unused
1603 */
1604 int lmax;
1605
1606 /**
1607 * Palette control structure
1608 * - encoding: ??? (no palette-enabled encoder yet)
1609 * - decoding: set by user.
1610 */
1611 struct AVPaletteControl *palctrl;
1612
1613 /**
1614 * noise reduction strength
1615 * - encoding: set by user.
1616 * - decoding: unused
1617 */
1618 int noise_reduction;
1619
1620 /**
1621 * called at the beginning of a frame to get cr buffer for it.
1622 * buffer type (size, hints) must be the same. lavc won't check it.
1623 * lavc will pass previous buffer in pic, function should return
1624 * same buffer or new buffer with old frame "painted" into it.
1625 * if pic.data[0] == NULL must behave like get_buffer().
1626 * - encoding: unused
1627 * - decoding: set by lavc, user can override
1628 */
1629 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1630
1631 /**
1632 * number of bits which should be loaded into the rc buffer before decoding starts
1633 * - encoding: set by user.
1634 * - decoding: unused
1635 */
1636 int rc_initial_buffer_occupancy;
1637
1638 /**
1639 *
1640 * - encoding: set by user.
1641 * - decoding: unused
1642 */
1643 int inter_threshold;
1644
1645 /**
1646 * CODEC_FLAG2_*.
1647 * - encoding: set by user.
1648 * - decoding: set by user.
1649 */
1650 int flags2;
1651
1652 /**
1653 * simulates errors in the bitstream to test error concealment.
1654 * - encoding: set by user.
1655 * - decoding: unused.
1656 */
1657 int error_rate;
1658
1659 /**
1660 * MP3 antialias algorithm, see FF_AA_* below.
1661 * - encoding: unused
1662 * - decoding: set by user
1663 */
1664 int antialias_algo;
1665 #define FF_AA_AUTO 0
1666 #define FF_AA_FASTINT 1 //not implemented yet
1667 #define FF_AA_INT 2
1668 #define FF_AA_FLOAT 3
1669 /**
1670 * Quantizer noise shaping.
1671 * - encoding: set by user
1672 * - decoding: unused
1673 */
1674 int quantizer_noise_shaping;
1675
1676 /**
1677 * Thread count.
1678 * is used to decide how many independant tasks should be passed to execute()
1679 * - encoding: set by user
1680 * - decoding: set by user
1681 */
1682 int thread_count;
1683
1684 /**
1685 * the codec may call this to execute several independant things. it will return only after
1686 * finishing all tasks, the user may replace this with some multithreaded implementation, the
1687 * default implementation will execute the parts serially
1688 * @param count the number of things to execute
1689 * - encoding: set by lavc, user can override
1690 * - decoding: set by lavc, user can override
1691 */
1692 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1693
1694 /**
1695 * Thread opaque.
1696 * can be used by execute() to store some per AVCodecContext stuff.
1697 * - encoding: set by execute()
1698 * - decoding: set by execute()
1699 */
1700 void *thread_opaque;
1701
1702 /**
1703 * Motion estimation threshold. under which no motion estimation is
1704 * performed, but instead the user specified motion vectors are used
1705 *
1706 * - encoding: set by user
1707 * - decoding: unused
1708 */
1709 int me_threshold;
1710
1711 /**
1712 * Macroblock threshold. under which the user specified macroblock types will be used
1713 * - encoding: set by user
1714 * - decoding: unused
1715 */
1716 int mb_threshold;
1717
1718 /**
1719 * precision of the intra dc coefficient - 8.
1720 * - encoding: set by user
1721 * - decoding: unused
1722 */
1723 int intra_dc_precision;
1724
1725 /**
1726 * noise vs. sse weight for the nsse comparsion function.
1727 * - encoding: set by user
1728 * - decoding: unused
1729 */
1730 int nsse_weight;
1731
1732 /**
1733 * number of macroblock rows at the top which are skipped.
1734 * - encoding: unused
1735 * - decoding: set by user
1736 */
1737 int skip_top;
1738
1739 /**
1740 * number of macroblock rows at the bottom which are skipped.
1741 * - encoding: unused
1742 * - decoding: set by user
1743 */
1744 int skip_bottom;
1745
1746 /**
1747 * profile
1748 * - encoding: set by user
1749 * - decoding: set by lavc
1750 */
1751 int profile;
1752 #define FF_PROFILE_UNKNOWN -99
1753
1754 /**
1755 * level
1756 * - encoding: set by user
1757 * - decoding: set by lavc
1758 */
1759 int level;
1760 #define FF_LEVEL_UNKNOWN -99
1761
1762 /**
1763 * low resolution decoding. 1-> 1/2 size, 2->1/4 size
1764 * - encoding: unused
1765 * - decoding: set by user
1766 */
1767 int lowres;
1768
1769 /**
1770 * bitsream width / height. may be different from width/height if lowres
1771 * or other things are used
1772 * - encoding: unused
1773 * - decoding: set by user before init if known, codec should override / dynamically change if needed
1774 */
1775 int coded_width, coded_height;
1776
1777 /**
1778 * frame skip threshold
1779 * - encoding: set by user
1780 * - decoding: unused
1781 */
1782 int frame_skip_threshold;
1783
1784 /**
1785 * frame skip factor
1786 * - encoding: set by user
1787 * - decoding: unused
1788 */
1789 int frame_skip_factor;
1790
1791 /**
1792 * frame skip exponent
1793 * - encoding: set by user
1794 * - decoding: unused
1795 */
1796 int frame_skip_exp;
1797
1798 /**
1799 * frame skip comparission function
1800 * - encoding: set by user.
1801 * - decoding: unused
1802 */
1803 int frame_skip_cmp;
1804
1805 /**
1806 * border processing masking. raises the quantizer for mbs on the borders
1807 * of the picture.
1808 * - encoding: set by user
1809 * - decoding: unused
1810 */
1811 float border_masking;
1812
1813 /**
1814 * minimum MB lagrange multipler.
1815 * - encoding: set by user.
1816 * - decoding: unused
1817 */
1818 int mb_lmin;
1819
1820 /**
1821 * maximum MB lagrange multipler.
1822 * - encoding: set by user.
1823 * - decoding: unused
1824 */
1825 int mb_lmax;
1826
1827 /**
1828 *
1829 * - encoding: set by user.
1830 * - decoding: unused
1831 */
1832 int me_penalty_compensation;
1833
1834 /**
1835 *
1836 * - encoding: unused
1837 * - decoding: set by user.
1838 */
1839 enum AVDiscard skip_loop_filter;
1840
1841 /**
1842 *
1843 * - encoding: unused
1844 * - decoding: set by user.
1845 */
1846 enum AVDiscard skip_idct;
1847
1848 /**
1849 *
1850 * - encoding: unused
1851 * - decoding: set by user.
1852 */
1853 enum AVDiscard skip_frame;
1854
1855 /**
1856 *
1857 * - encoding: set by user.
1858 * - decoding: unused
1859 */
1860 int bidir_refine;
1861
1862 /**
1863 *
1864 * - encoding: set by user.
1865 * - decoding: unused
1866 */
1867 int brd_scale;
1868
1869 /**
1870 * constant rate factor - quality-based VBR - values ~correspond to qps
1871 * - encoding: set by user.
1872 * - decoding: unused
1873 */
1874 int crf;
1875
1876 /**
1877 * constant quantization parameter rate control method
1878 * - encoding: set by user.
1879 * - decoding: unused
1880 */
1881 int cqp;
1882
1883 /**
1884 * minimum gop size
1885 * - encoding: set by user.
1886 * - decoding: unused
1887 */
1888 int keyint_min;
1889
1890 /**
1891 * number of reference frames
1892 * - encoding: set by user.
1893 * - decoding: unused
1894 */
1895 int refs;
1896
1897 /**
1898 * chroma qp offset from luma
1899 * - encoding: set by user.
1900 * - decoding: unused
1901 */
1902 int chromaoffset;
1903
1904 /**
1905 * influences how often b-frames are used
1906 * - encoding: set by user.
1907 * - decoding: unused
1908 */
1909 int bframebias;
1910
1911 /**
1912 * trellis RD quantization
1913 * - encoding: set by user.
1914 * - decoding: unused
1915 */
1916 int trellis;
1917
1918 /**
1919 * reduce fluctuations in qp (before curve compression)
1920 * - encoding: set by user.
1921 * - decoding: unused
1922 */
1923 float complexityblur;
1924
1925 /**
1926 * in-loop deblocking filter alphac0 parameter
1927 * alpha is in the range -6...6
1928 * - encoding: set by user.
1929 * - decoding: unused
1930 */
1931 int deblockalpha;
1932
1933 /**
1934 * in-loop deblocking filter beta parameter
1935 * beta is in the range -6...6
1936 * - encoding: set by user.
1937 * - decoding: unused
1938 */
1939 int deblockbeta;
1940
1941 /**
1942 * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
1943 * - encoding: set by user.
1944 * - decoding: unused
1945 */
1946 int partitions;
1947 #define X264_PART_I4X4 0x001 /* Analyse i4x4 */
1948 #define X264_PART_I8X8 0x002 /* Analyse i8x8 (requires 8x8 transform) */
1949 #define X264_PART_P8X8 0x010 /* Analyse p16x8, p8x16 and p8x8 */
1950 #define X264_PART_P4X4 0x020 /* Analyse p8x4, p4x8, p4x4 */
1951 #define X264_PART_B8X8 0x100 /* Analyse b16x8, b8x16 and b8x8 */
1952
1953 /**
1954 * direct mv prediction mode - 0 (none), 1 (spatial), 2 (temporal)
1955 * - encoding: set by user.
1956 * - decoding: unused
1957 */
1958 int directpred;
1959
1960 /**
1961 * audio cutoff bandwidth (0 means "automatic") . Currently used only by FAAC
1962 * - encoding: set by user.
1963 * - decoding: unused
1964 */
1965 int cutoff;
1966
1967 /**
1968 * multiplied by qscale for each frame and added to scene_change_score
1969 * - encoding: set by user.
1970 * - decoding: unused
1971 */
1972 int scenechange_factor;
1973
1974 /**
1975 *
1976 * note: value depends upon the compare functin used for fullpel ME
1977 * - encoding: set by user.
1978 * - decoding: unused
1979 */
1980 int mv0_threshold;
1981
1982 /**
1983 * adjusts sensitivity of b_frame_strategy 1
1984 * - encoding: set by user.
1985 * - decoding: unused
1986 */
1987 int b_sensitivity;
1988 } AVCodecContext;
1989
1990 /**
1991 * AVCodec.
1992 */
1993 typedef struct AVCodec {
1994 const char *name;
1995 enum CodecType type;
1996 enum CodecID id;
1997 int priv_data_size;
1998 int (*init)(AVCodecContext *);
1999 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2000 int (*close)(AVCodecContext *);
2001 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
2002 uint8_t *buf, int buf_size);
2003 int capabilities;
2004 #if LIBAVCODEC_VERSION_INT < ((50<<16)+(0<<8)+0)
2005 void *dummy; // FIXME remove next time we break binary compatibility
2006 #endif
2007 struct AVCodec *next;
2008 void (*flush)(AVCodecContext *);
2009 const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
2010 const enum PixelFormat *pix_fmts; ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
2011 } AVCodec;
2012
2013 /**
2014 * four components are given, that's all.
2015 * the last component is alpha
2016 */
2017 typedef struct AVPicture {
2018 uint8_t *data[4];
2019 int linesize[4]; ///< number of bytes per line
2020 } AVPicture;
2021
2022 /**
2023 * AVPaletteControl
2024 * This structure defines a method for communicating palette changes
2025 * between and demuxer and a decoder.
2026 */
2027 #define AVPALETTE_SIZE 1024
2028 #define AVPALETTE_COUNT 256
2029 typedef struct AVPaletteControl {
2030
2031 /* demuxer sets this to 1 to indicate the palette has changed;
2032 * decoder resets to 0 */
2033 int palette_changed;
2034
2035 /* 4-byte ARGB palette entries, stored in native byte order; note that
2036 * the individual palette components should be on a 8-bit scale; if
2037 * the palette data comes from a IBM VGA native format, the component
2038 * data is probably 6 bits in size and needs to be scaled */
2039 unsigned int palette[AVPALETTE_COUNT];
2040
2041 } AVPaletteControl;
2042
2043 typedef struct AVSubtitleRect {
2044 uint16_t x;
2045 uint16_t y;
2046 uint16_t w;
2047 uint16_t h;
2048 uint16_t nb_colors;
2049 int linesize;
2050 uint32_t *rgba_palette;
2051 uint8_t *bitmap;
2052 } AVSubtitleRect;
2053
2054 typedef struct AVSubtitle {
2055 uint16_t format; /* 0 = graphics */
2056 uint32_t start_display_time; /* relative to packet pts, in ms */
2057 uint32_t end_display_time; /* relative to packet pts, in ms */
2058 uint32_t num_rects;
2059 AVSubtitleRect *rects;
2060 } AVSubtitle;
2061
2062 extern AVCodec ac3_encoder;
2063 extern AVCodec mp2_encoder;
2064 extern AVCodec mp3lame_encoder;
2065 extern AVCodec oggvorbis_encoder;
2066 extern AVCodec oggtheora_encoder;
2067 extern AVCodec faac_encoder;
2068 extern AVCodec xvid_encoder;
2069 extern AVCodec mpeg1video_encoder;
2070 extern AVCodec mpeg2video_encoder;
2071 extern AVCodec h261_encoder;
2072 extern AVCodec h263_encoder;
2073 extern AVCodec h263p_encoder;
2074 extern AVCodec flv_encoder;
2075 extern AVCodec rv10_encoder;
2076 extern AVCodec rv20_encoder;
2077 extern AVCodec dvvideo_encoder;
2078 extern AVCodec mjpeg_encoder;
2079 extern AVCodec ljpeg_encoder;
2080 extern AVCodec jpegls_encoder;
2081 extern AVCodec png_encoder;
2082 extern AVCodec ppm_encoder;
2083 extern AVCodec pgm_encoder;
2084 extern AVCodec pgmyuv_encoder;
2085 extern AVCodec pbm_encoder;
2086 extern AVCodec pam_encoder;
2087 extern AVCodec mpeg4_encoder;
2088 extern AVCodec msmpeg4v1_encoder;
2089 extern AVCodec msmpeg4v2_encoder;
2090 extern AVCodec msmpeg4v3_encoder;
2091 extern AVCodec wmv1_encoder;
2092 extern AVCodec wmv2_encoder;
2093 extern AVCodec huffyuv_encoder;
2094 extern AVCodec ffvhuff_encoder;
2095 extern AVCodec h264_encoder;
2096 extern AVCodec asv1_encoder;
2097 extern AVCodec asv2_encoder;
2098 extern AVCodec vcr1_encoder;
2099 extern AVCodec ffv1_encoder;
2100 extern AVCodec snow_encoder;
2101 extern AVCodec mdec_encoder;
2102 extern AVCodec zlib_encoder;
2103 extern AVCodec sonic_encoder;
2104 extern AVCodec sonic_ls_encoder;
2105 extern AVCodec svq1_encoder;
2106 extern AVCodec x264_encoder;
2107
2108 extern AVCodec h263_decoder;
2109 extern AVCodec h261_decoder;
2110 extern AVCodec mpeg4_decoder;
2111 extern AVCodec msmpeg4v1_decoder;
2112 extern AVCodec msmpeg4v2_decoder;
2113 extern AVCodec msmpeg4v3_decoder;
2114 extern AVCodec wmv1_decoder;
2115 extern AVCodec wmv2_decoder;
2116 extern AVCodec vc9_decoder;
2117 extern AVCodec wmv3_decoder;
2118 extern AVCodec mpeg1video_decoder;
2119 extern AVCodec mpeg2video_decoder;
2120 extern AVCodec mpegvideo_decoder;
2121 extern AVCodec mpeg_xvmc_decoder;
2122 extern AVCodec h263i_decoder;
2123 extern AVCodec flv_decoder;
2124 extern AVCodec rv10_decoder;
2125 extern AVCodec rv20_decoder;
2126 extern AVCodec rv30_decoder;
2127 extern AVCodec rv40_decoder;
2128 extern AVCodec svq1_decoder;
2129 extern AVCodec svq3_decoder;
2130 extern AVCodec dvvideo_decoder;
2131 extern AVCodec wmav1_decoder;
2132 extern AVCodec wmav2_decoder;
2133 extern AVCodec mjpeg_decoder;
2134 extern AVCodec mjpegb_decoder;
2135 extern AVCodec sp5x_decoder;
2136 extern AVCodec png_decoder;
2137 extern AVCodec mp2_decoder;
2138 extern AVCodec mp3_decoder;
2139 extern AVCodec mp3adu_decoder;
2140 extern AVCodec mp3on4_decoder;
2141 extern AVCodec qdm2_decoder;
2142 extern AVCodec cook_decoder;
2143 extern AVCodec truespeech_decoder;
2144 extern AVCodec tta_decoder;
2145 extern AVCodec mace3_decoder;
2146 extern AVCodec mace6_decoder;
2147 extern AVCodec huffyuv_decoder;
2148 extern AVCodec ffvhuff_decoder;
2149 extern AVCodec oggvorbis_decoder;
2150 extern AVCodec oggtheora_decoder;
2151 extern AVCodec cyuv_decoder;
2152 extern AVCodec h264_decoder;
2153 extern AVCodec indeo3_decoder;
2154 extern AVCodec vp3_decoder;
2155 extern AVCodec theora_decoder;
2156 extern AVCodec amr_nb_decoder;
2157 extern AVCodec amr_nb_encoder;
2158 extern AVCodec amr_wb_encoder;
2159 extern AVCodec amr_wb_decoder;
2160 extern AVCodec aac_decoder;
2161 extern AVCodec mpeg4aac_decoder;
2162 extern AVCodec asv1_decoder;
2163 extern AVCodec asv2_decoder;
2164 extern AVCodec vcr1_decoder;
2165 extern AVCodec cljr_decoder;
2166 extern AVCodec ffv1_decoder;
2167 extern AVCodec snow_decoder;
2168 extern AVCodec fourxm_decoder;
2169 extern AVCodec mdec_decoder;
2170 extern AVCodec roq_decoder;
2171 extern AVCodec interplay_video_decoder;
2172 extern AVCodec xan_wc3_decoder;
2173 extern AVCodec rpza_decoder;
2174 extern AVCodec cinepak_decoder;
2175 extern AVCodec msrle_decoder;
2176 extern AVCodec msvideo1_decoder;
2177 extern AVCodec vqa_decoder;
2178 extern AVCodec idcin_decoder;
2179 extern AVCodec eightbps_decoder;
2180 extern AVCodec smc_decoder;
2181 extern AVCodec flic_decoder;
2182 extern AVCodec vmdvideo_decoder;
2183 extern AVCodec vmdaudio_decoder;
2184 extern AVCodec truemotion1_decoder;
2185 extern AVCodec truemotion2_decoder;
2186 extern AVCodec mszh_decoder;
2187 extern AVCodec zlib_decoder;
2188 extern AVCodec ra_144_decoder;
2189 extern AVCodec ra_288_decoder;
2190 extern AVCodec roq_dpcm_decoder;
2191 extern AVCodec interplay_dpcm_decoder;
2192 extern AVCodec xan_dpcm_decoder;
2193 extern AVCodec sol_dpcm_decoder;
2194 extern AVCodec sonic_decoder;
2195 extern AVCodec qtrle_decoder;
2196 extern AVCodec flac_decoder;
2197 extern AVCodec tscc_decoder;
2198 extern AVCodec cscd_decoder;
2199 extern AVCodec nuv_decoder;
2200 extern AVCodec ulti_decoder;
2201 extern AVCodec qdraw_decoder;
2202 extern AVCodec xl_decoder;
2203 extern AVCodec qpeg_decoder;
2204 extern AVCodec shorten_decoder;
2205 extern AVCodec loco_decoder;
2206 extern AVCodec wnv1_decoder;
2207 extern AVCodec aasc_decoder;
2208 extern AVCodec alac_decoder;
2209 extern AVCodec ws_snd1_decoder;
2210 extern AVCodec indeo2_decoder;
2211 extern AVCodec vorbis_decoder;
2212 extern AVCodec fraps_decoder;
2213 extern AVCodec libgsm_encoder;
2214 extern AVCodec libgsm_decoder;
2215 extern AVCodec bmp_decoder;
2216 extern AVCodec mmvideo_decoder;
2217 extern AVCodec zmbv_decoder;
2218 extern AVCodec avs_decoder;
2219 extern AVCodec smacker_decoder;
2220 extern AVCodec smackaud_decoder;
2221 extern AVCodec kmvc_decoder;
2222 extern AVCodec flashsv_decoder;
2223
2224 /* pcm codecs */
2225 #define PCM_CODEC(id, name) \
2226 extern AVCodec name ## _decoder; \
2227 extern AVCodec name ## _encoder
2228
2229 PCM_CODEC(CODEC_ID_PCM_S32LE, pcm_s32le);
2230 PCM_CODEC(CODEC_ID_PCM_S32BE, pcm_s32be);
2231 PCM_CODEC(CODEC_ID_PCM_U32LE, pcm_u32le);
2232 PCM_CODEC(CODEC_ID_PCM_U32BE, pcm_u32be);
2233 PCM_CODEC(CODEC_ID_PCM_S24LE, pcm_s24le);
2234 PCM_CODEC(CODEC_ID_PCM_S24BE, pcm_s24be);
2235 PCM_CODEC(CODEC_ID_PCM_U24LE, pcm_u24le);
2236 PCM_CODEC(CODEC_ID_PCM_U24BE, pcm_u24be);
2237 PCM_CODEC(CODEC_ID_PCM_S24DAUD, pcm_s24daud);
2238 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
2239 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
2240 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
2241 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
2242 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
2243 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
2244 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
2245 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
2246
2247 /* adpcm codecs */
2248
2249 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
2250 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
2251 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
2252 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
2253 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
2254 PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
2255 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
2256 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
2257 PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
2258 PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
2259 PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
2260 PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
2261 PCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
2262 PCM_CODEC(CODEC_ID_ADPCM_SWF, adpcm_swf);
2263 PCM_CODEC(CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha);
2264 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4);
2265 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3);
2266 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_2, adpcm_sbpro_2);
2267
2268 #undef PCM_CODEC
2269
2270 /* dummy raw video codec */
2271 extern AVCodec rawvideo_encoder;
2272 extern AVCodec rawvideo_decoder;
2273
2274 /* the following codecs use external GPL libs */
2275 extern AVCodec ac3_decoder;
2276 extern AVCodec dts_decoder;
2277
2278 /* subtitles */
2279 extern AVCodec dvdsub_encoder;
2280 extern AVCodec dvdsub_decoder;
2281 extern AVCodec dvbsub_encoder;
2282 extern AVCodec dvbsub_decoder;
2283
2284 /* resample.c */
2285
2286 struct ReSampleContext;
2287 struct AVResampleContext;
2288
2289 typedef struct ReSampleContext ReSampleContext;
2290
2291 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2292 int output_rate, int input_rate);
2293 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2294 void audio_resample_close(ReSampleContext *s);
2295
2296 struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2297 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2298 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2299 void av_resample_close(struct AVResampleContext *c);
2300
2301 /* YUV420 format is assumed ! */
2302
2303 struct ImgReSampleContext;
2304
2305 typedef struct ImgReSampleContext ImgReSampleContext;
2306
2307 ImgReSampleContext *img_resample_init(int output_width, int output_height,
2308 int input_width, int input_height);
2309
2310 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
2311 int iwidth, int iheight,
2312 int topBand, int bottomBand,
2313 int leftBand, int rightBand,
2314 int padtop, int padbottom,
2315 int padleft, int padright);
2316
2317
2318 void img_resample(ImgReSampleContext *s,
2319 AVPicture *output, const AVPicture *input);
2320
2321 void img_resample_close(ImgReSampleContext *s);
2322
2323 /**
2324 * Allocate memory for a picture. Call avpicture_free to free it.
2325 *
2326 * @param picture the picture to be filled in.
2327 * @param pix_fmt the format of the picture.
2328 * @param width the width of the picture.
2329 * @param height the height of the picture.
2330 * @return 0 if successful, -1 if not.
2331 */
2332 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2333
2334 /* Free a picture previously allocated by avpicture_alloc. */
2335 void avpicture_free(AVPicture *picture);
2336
2337 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2338 int pix_fmt, int width, int height);
2339 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2340 unsigned char *dest, int dest_size);
2341 int avpicture_get_size(int pix_fmt, int width, int height);
2342 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2343 const char *avcodec_get_pix_fmt_name(int pix_fmt);
2344 void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2345 enum PixelFormat avcodec_get_pix_fmt(const char* name);
2346 unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2347
2348 #define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
2349 #define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
2350 #define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
2351 #define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
2352 #define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
2353 #define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
2354
2355 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2356 int has_alpha);
2357 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2358 int has_alpha, int *loss_ptr);
2359
2360 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
2361 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
2362 int img_get_alpha_info(const AVPicture *src,
2363 int pix_fmt, int width, int height);
2364
2365 /* convert among pixel formats */
2366 int img_convert(AVPicture *dst, int dst_pix_fmt,
2367 const AVPicture *src, int pix_fmt,
2368 int width, int height);
2369
2370 /* deinterlace a picture */
2371 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2372 int pix_fmt, int width, int height);
2373
2374 /* external high level API */
2375
2376 extern AVCodec *first_avcodec;
2377
2378 /* returns LIBAVCODEC_VERSION_INT constant */
2379 unsigned avcodec_version(void);
2380 /* returns LIBAVCODEC_BUILD constant */
2381 unsigned avcodec_build(void);
2382 void avcodec_init(void);
2383
2384 void register_avcodec(AVCodec *format);
2385 AVCodec *avcodec_find_encoder(enum CodecID id);
2386 AVCodec *avcodec_find_encoder_by_name(const char *name);
2387 AVCodec *avcodec_find_decoder(enum CodecID id);
2388 AVCodec *avcodec_find_decoder_by_name(const char *name);
2389 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2390
2391 void avcodec_get_context_defaults(AVCodecContext *s);
2392 AVCodecContext *avcodec_alloc_context(void);
2393 void avcodec_get_frame_defaults(AVFrame *pic);
2394 AVFrame *avcodec_alloc_frame(void);
2395
2396 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2397 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2398 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2399 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2400 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2401 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2402
2403 int avcodec_thread_init(AVCodecContext *s, int thread_count);
2404 void avcodec_thread_free(AVCodecContext *s);
2405 int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2406 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2407 //FIXME func typedef
2408
2409 /**
2410 * opens / inits the AVCodecContext.
2411 * not thread save!
2412 */
2413 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2414
2415 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2416 int *frame_size_ptr,
2417 uint8_t *buf, int buf_size);
2418 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2419 int *got_picture_ptr,
2420 uint8_t *buf, int buf_size);
2421 int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
2422 int *got_sub_ptr,
2423 const uint8_t *buf, int buf_size);
2424 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2425 int *data_size_ptr,
2426 uint8_t *buf, int buf_size);
2427 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2428 const short *samples);
2429 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2430 const AVFrame *pict);
2431 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2432 const AVSubtitle *sub);
2433
2434 int avcodec_close(AVCodecContext *avctx);
2435
2436 void avcodec_register_all(void);
2437
2438 void avcodec_flush_buffers(AVCodecContext *avctx);
2439
2440 void avcodec_default_free_buffers(AVCodecContext *s);
2441
2442 /* misc usefull functions */
2443
2444 /**
2445 * returns a single letter to describe the picture type
2446 */
2447 char av_get_pict_type_char(int pict_type);
2448
2449
2450 /* frame parsing */
2451 typedef struct AVCodecParserContext {
2452 void *priv_data;
2453 struct AVCodecParser *parser;
2454 int64_t frame_offset; /* offset of the current frame */
2455 int64_t cur_offset; /* current offset
2456 (incremented by each av_parser_parse()) */
2457 int64_t last_frame_offset; /* offset of the last frame */
2458 /* video info */
2459 int pict_type; /* XXX: put it back in AVCodecContext */
2460 int repeat_pict; /* XXX: put it back in AVCodecContext */
2461 int64_t pts; /* pts of the current frame */
2462 int64_t dts; /* dts of the current frame */
2463
2464 /* private data */
2465 int64_t last_pts;
2466 int64_t last_dts;
2467 int fetch_timestamp;
2468
2469 #define AV_PARSER_PTS_NB 4
2470 int cur_frame_start_index;
2471 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2472 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2473 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2474
2475 int flags;
2476 #define PARSER_FLAG_COMPLETE_FRAMES 0x0001
2477 } AVCodecParserContext;
2478
2479 typedef struct AVCodecParser {
2480 int codec_ids[5]; /* several codec IDs are permitted */
2481 int priv_data_size;
2482 int (*parser_init)(AVCodecParserContext *s);
2483 int (*parser_parse)(AVCodecParserContext *s,
2484 AVCodecContext *avctx,
2485 uint8_t **poutbuf, int *poutbuf_size,
2486 const uint8_t *buf, int buf_size);
2487 void (*parser_close)(AVCodecParserContext *s);
2488 int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
2489 struct AVCodecParser *next;
2490 } AVCodecParser;
2491
2492 extern AVCodecParser *av_first_parser;
2493
2494 void av_register_codec_parser(AVCodecParser *parser);
2495 AVCodecParserContext *av_parser_init(int codec_id);
2496 int av_parser_parse(AVCodecParserContext *s,
2497 AVCodecContext *avctx,
2498 uint8_t **poutbuf, int *poutbuf_size,
2499 const uint8_t *buf, int buf_size,
2500 int64_t pts, int64_t dts);
2501 int av_parser_change(AVCodecParserContext *s,
2502 AVCodecContext *avctx,
2503 uint8_t **poutbuf, int *poutbuf_size,
2504 const uint8_t *buf, int buf_size, int keyframe);
2505 void av_parser_close(AVCodecParserContext *s);
2506
2507 extern AVCodecParser mpegvideo_parser;
2508 extern AVCodecParser mpeg4video_parser;
2509 extern AVCodecParser h261_parser;
2510 extern AVCodecParser h263_parser;
2511 extern AVCodecParser h264_parser;
2512 extern AVCodecParser mjpeg_parser;
2513 extern AVCodecParser pnm_parser;
2514 extern AVCodecParser mpegaudio_parser;
2515 extern AVCodecParser ac3_parser;
2516 extern AVCodecParser dvdsub_parser;
2517 extern AVCodecParser dvbsub_parser;
2518 extern AVCodecParser aac_parser;
2519
2520 /* memory */
2521 void *av_malloc(unsigned int size);
2522 void *av_mallocz(unsigned int size);
2523 void *av_realloc(void *ptr, unsigned int size);
2524 void av_free(void *ptr);
2525 char *av_strdup(const char *s);
2526 void av_freep(void *ptr);
2527 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2528 /* for static data only */
2529 /* call av_free_static to release all staticaly allocated tables */
2530 void av_free_static(void);
2531 void *av_mallocz_static(unsigned int size);
2532 void *av_realloc_static(void *ptr, unsigned int size);
2533
2534 /* add by bero : in adx.c */
2535 int is_adx(const unsigned char *buf,size_t bufsize);
2536
2537 void img_copy(AVPicture *dst, const AVPicture *src,
2538 int pix_fmt, int width, int height);
2539
2540 int img_crop(AVPicture *dst, const AVPicture *src,
2541 int pix_fmt, int top_band, int left_band);
2542
2543 int img_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
2544 int padtop, int padbottom, int padleft, int padright, int *color);
2545
2546 /* av_log API */
2547
2548 #include <stdarg.h>
2549
2550 #define AV_LOG_QUIET -1
2551 #define AV_LOG_ERROR 0
2552 #define AV_LOG_INFO 1
2553 #define AV_LOG_DEBUG 2
2554
2555 #ifdef __GNUC__
2556 extern void av_log(void*, int level, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 3, 4)));
2557 #else
2558 extern void av_log(void*, int level, const char *fmt, ...);
2559 #endif
2560
2561 extern void av_vlog(void*, int level, const char *fmt, va_list);
2562 extern int av_log_get_level(void);
2563 extern void av_log_set_level(int);
2564 extern void av_log_set_callback(void (*)(void*, int, const char*, va_list));
2565
2566 /* endian macros */
2567 #if !defined(BE_16) || !defined(BE_32) || !defined(LE_16) || !defined(LE_32)
2568 #define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
2569 #define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
2570 (((uint8_t*)(x))[1] << 16) | \
2571 (((uint8_t*)(x))[2] << 8) | \
2572 ((uint8_t*)(x))[3])
2573 #define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
2574 #define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \
2575 (((uint8_t*)(x))[2] << 16) | \
2576 (((uint8_t*)(x))[1] << 8) | \
2577 ((uint8_t*)(x))[0])
2578 #endif
2579
2580 extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
2581
2582 #ifdef __cplusplus
2583 }
2584 #endif
2585
2586 #endif /* AVCODEC_H */