e71eab76cf08437b91282452b8e0f9e28bbdbdef
[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 "CVS"
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
125 /* various pcm "codecs" */
126 CODEC_ID_PCM_S16LE= 0x10000,
127 CODEC_ID_PCM_S16BE,
128 CODEC_ID_PCM_U16LE,
129 CODEC_ID_PCM_U16BE,
130 CODEC_ID_PCM_S8,
131 CODEC_ID_PCM_U8,
132 CODEC_ID_PCM_MULAW,
133 CODEC_ID_PCM_ALAW,
134 CODEC_ID_PCM_S32LE,
135 CODEC_ID_PCM_S32BE,
136 CODEC_ID_PCM_U32LE,
137 CODEC_ID_PCM_U32BE,
138 CODEC_ID_PCM_S24LE,
139 CODEC_ID_PCM_S24BE,
140 CODEC_ID_PCM_U24LE,
141 CODEC_ID_PCM_U24BE,
142 CODEC_ID_PCM_S24DAUD,
143
144 /* various adpcm codecs */
145 CODEC_ID_ADPCM_IMA_QT= 0x11000,
146 CODEC_ID_ADPCM_IMA_WAV,
147 CODEC_ID_ADPCM_IMA_DK3,
148 CODEC_ID_ADPCM_IMA_DK4,
149 CODEC_ID_ADPCM_IMA_WS,
150 CODEC_ID_ADPCM_IMA_SMJPEG,
151 CODEC_ID_ADPCM_MS,
152 CODEC_ID_ADPCM_4XM,
153 CODEC_ID_ADPCM_XA,
154 CODEC_ID_ADPCM_ADX,
155 CODEC_ID_ADPCM_EA,
156 CODEC_ID_ADPCM_G726,
157 CODEC_ID_ADPCM_CT,
158 CODEC_ID_ADPCM_SWF,
159 CODEC_ID_ADPCM_YAMAHA,
160 CODEC_ID_ADPCM_SBPRO_4,
161 CODEC_ID_ADPCM_SBPRO_3,
162 CODEC_ID_ADPCM_SBPRO_2,
163
164 /* AMR */
165 CODEC_ID_AMR_NB= 0x12000,
166 CODEC_ID_AMR_WB,
167
168 /* RealAudio codecs*/
169 CODEC_ID_RA_144= 0x13000,
170 CODEC_ID_RA_288,
171
172 /* various DPCM codecs */
173 CODEC_ID_ROQ_DPCM= 0x14000,
174 CODEC_ID_INTERPLAY_DPCM,
175 CODEC_ID_XAN_DPCM,
176 CODEC_ID_SOL_DPCM,
177
178 CODEC_ID_MP2= 0x15000,
179 CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
180 CODEC_ID_AAC,
181 CODEC_ID_MPEG4AAC,
182 CODEC_ID_AC3,
183 CODEC_ID_DTS,
184 CODEC_ID_VORBIS,
185 CODEC_ID_DVAUDIO,
186 CODEC_ID_WMAV1,
187 CODEC_ID_WMAV2,
188 CODEC_ID_MACE3,
189 CODEC_ID_MACE6,
190 CODEC_ID_VMDAUDIO,
191 CODEC_ID_SONIC,
192 CODEC_ID_SONIC_LS,
193 CODEC_ID_FLAC,
194 CODEC_ID_MP3ADU,
195 CODEC_ID_MP3ON4,
196 CODEC_ID_SHORTEN,
197 CODEC_ID_ALAC,
198 CODEC_ID_WESTWOOD_SND1,
199 CODEC_ID_GSM,
200 CODEC_ID_QDM2,
201 CODEC_ID_COOK,
202 CODEC_ID_TRUESPEECH,
203 CODEC_ID_TTA,
204 CODEC_ID_SMACKAUDIO,
205
206 CODEC_ID_OGGTHEORA= 0x16000,
207
208 /* subtitle codecs */
209 CODEC_ID_DVD_SUBTITLE= 0x17000,
210 CODEC_ID_DVB_SUBTITLE,
211
212 CODEC_ID_MPEG2TS= 0x20000, /* _FAKE_ codec to indicate a raw MPEG2 transport
213 stream (only used by libavformat) */
214 };
215
216 /* CODEC_ID_MP3LAME is absolete */
217 #define CODEC_ID_MP3LAME CODEC_ID_MP3
218
219 enum CodecType {
220 CODEC_TYPE_UNKNOWN = -1,
221 CODEC_TYPE_VIDEO,
222 CODEC_TYPE_AUDIO,
223 CODEC_TYPE_DATA,
224 CODEC_TYPE_SUBTITLE,
225 };
226
227 /* currently unused, may be used if 24/32 bits samples ever supported */
228 /* all in native endian */
229 enum SampleFormat {
230 SAMPLE_FMT_NONE = -1,
231 SAMPLE_FMT_U8, ///< unsigned 8 bits
232 SAMPLE_FMT_S16, ///< signed 16 bits
233 SAMPLE_FMT_S24, ///< signed 24 bits
234 SAMPLE_FMT_S32, ///< signed 32 bits
235 SAMPLE_FMT_FLT, ///< float
236 };
237
238 /* in bytes */
239 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
240
241 /**
242 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
243 * this is mainly needed because some optimized bitstream readers read
244 * 32 or 64 bit at once and could read over the end<br>
245 * Note, if the first 23 bits of the additional bytes are not 0 then damaged
246 * MPEG bitstreams could cause overread and segfault
247 */
248 #define FF_INPUT_BUFFER_PADDING_SIZE 8
249
250 /**
251 * minimum encoding buffer size.
252 * used to avoid some checks during header writing
253 */
254 #define FF_MIN_BUFFER_SIZE 16384
255
256 /* motion estimation type, EPZS by default */
257 enum Motion_Est_ID {
258 ME_ZERO = 1,
259 ME_FULL,
260 ME_LOG,
261 ME_PHODS,
262 ME_EPZS,
263 ME_X1,
264 ME_HEX,
265 ME_UMH,
266 ME_ITER,
267 };
268
269 enum AVDiscard{
270 //we leave some space between them for extensions (drop some keyframes for intra only or drop just some bidir frames)
271 AVDISCARD_NONE =-16, ///< discard nothing
272 AVDISCARD_DEFAULT= 0, ///< discard useless packets like 0 size packets in avi
273 AVDISCARD_NONREF = 8, ///< discard all non reference
274 AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
275 AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
276 AVDISCARD_ALL = 48, ///< discard all
277 };
278
279 typedef struct RcOverride{
280 int start_frame;
281 int end_frame;
282 int qscale; // if this is 0 then quality_factor will be used instead
283 float quality_factor;
284 } RcOverride;
285
286 /* only for ME compatiblity with old apps */
287 extern int motion_estimation_method;
288
289 #define FF_MAX_B_FRAMES 16
290
291 /* encoding support
292 these flags can be passed in AVCodecContext.flags before initing
293 Note: not everything is supported yet.
294 */
295
296 #define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
297 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / Advanced prediction for H263
298 #define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
299 #define CODEC_FLAG_GMC 0x0020 ///< use GMC
300 #define CODEC_FLAG_MV0 0x0040 ///< always try a MB with MV=<0,0>
301 #define CODEC_FLAG_PART 0x0080 ///< use data partitioning
302 /* parent program gurantees that the input for b-frame containing streams is not written to
303 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
304 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
305 #define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
306 #define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
307 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
308 #define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
309 #define CODEC_FLAG_EMU_EDGE 0x4000///< don't draw edges
310 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
311 #define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
312 of only at frame boundaries */
313 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
314 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
315 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay
316 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
317 #define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
318 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
319 #define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
320 /* Fx : Flag for h263+ extra options */
321 #define CODEC_FLAG_H263P_AIC 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
322 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
323 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
324 #define CODEC_FLAG_CBP_RD 0x04000000 ///< use rate distortion optimization for cbp
325 #define CODEC_FLAG_QP_RD 0x08000000 ///< use rate distortion optimization for qp selectioon
326 #define CODEC_FLAG_H263P_AIV 0x00000008 ///< H263 Alternative inter vlc
327 #define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
328 #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
329 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
330 #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
331 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
332 #define CODEC_FLAG_CLOSED_GOP 0x80000000
333 #define CODEC_FLAG2_FAST 0x00000001 ///< allow non spec compliant speedup tricks
334 #define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< strictly enforce GOP size
335 #define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< skip bitstream encoding
336 #define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< place global headers at every keyframe instead of in extradata
337 #define CODEC_FLAG2_BPYRAMID 0x00000010 ///< H.264 allow b-frames to be used as references
338 #define CODEC_FLAG2_WPRED 0x00000020 ///< H.264 weighted biprediction for b-frames
339 #define CODEC_FLAG2_MIXED_REFS 0x00000040 ///< H.264 multiple references per partition
340 #define CODEC_FLAG2_8X8DCT 0x00000080 ///< H.264 high profile 8x8 transform
341 #define CODEC_FLAG2_FASTPSKIP 0x00000100 ///< H.264 fast pskip
342 #define CODEC_FLAG2_AUD 0x00000200 ///< H.264 access unit delimiters
343 #define CODEC_FLAG2_BRDO 0x00000400 ///< b-frame rate-distortion optimization
344
345 /* Unsupported options :
346 * Syntax Arithmetic coding (SAC)
347 * Reference Picture Selection
348 * Independant Segment Decoding */
349 /* /Fx */
350 /* codec capabilities */
351
352 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
353 /**
354 * Codec uses get_buffer() for allocating buffers.
355 * direct rendering method 1
356 */
357 #define CODEC_CAP_DR1 0x0002
358 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
359 used */
360 #define CODEC_CAP_PARSE_ONLY 0x0004
361 #define CODEC_CAP_TRUNCATED 0x0008
362 /* codec can export data for HW decoding (XvMC) */
363 #define CODEC_CAP_HWACCEL 0x0010
364 /**
365 * codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data.
366 * if this is not set, the codec is guranteed to never be feeded with NULL data
367 */
368 #define CODEC_CAP_DELAY 0x0020
369
370 //the following defines may change, don't expect compatibility if you use them
371 #define MB_TYPE_INTRA4x4 0x0001
372 #define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
373 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME h264 specific
374 #define MB_TYPE_16x16 0x0008
375 #define MB_TYPE_16x8 0x0010
376 #define MB_TYPE_8x16 0x0020
377 #define MB_TYPE_8x8 0x0040
378 #define MB_TYPE_INTERLACED 0x0080
379 #define MB_TYPE_DIRECT2 0x0100 //FIXME
380 #define MB_TYPE_ACPRED 0x0200
381 #define MB_TYPE_GMC 0x0400
382 #define MB_TYPE_SKIP 0x0800
383 #define MB_TYPE_P0L0 0x1000
384 #define MB_TYPE_P1L0 0x2000
385 #define MB_TYPE_P0L1 0x4000
386 #define MB_TYPE_P1L1 0x8000
387 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
388 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
389 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
390 #define MB_TYPE_QUANT 0x00010000
391 #define MB_TYPE_CBP 0x00020000
392 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
393
394 /**
395 * Pan Scan area.
396 * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
397 */
398 typedef struct AVPanScan{
399 /**
400 * id.
401 * - encoding: set by user.
402 * - decoding: set by lavc
403 */
404 int id;
405
406 /**
407 * width and height in 1/16 pel
408 * - encoding: set by user.
409 * - decoding: set by lavc
410 */
411 int width;
412 int height;
413
414 /**
415 * position of the top left corner in 1/16 pel for up to 3 fields/frames.
416 * - encoding: set by user.
417 * - decoding: set by lavc
418 */
419 int16_t position[3][2];
420 }AVPanScan;
421
422 #define FF_COMMON_FRAME \
423 /**\
424 * pointer to the picture planes.\
425 * this might be different from the first allocated byte\
426 * - encoding: \
427 * - decoding: \
428 */\
429 uint8_t *data[4];\
430 int linesize[4];\
431 /**\
432 * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
433 * this isn't used by lavc unless the default get/release_buffer() is used\
434 * - encoding: \
435 * - decoding: \
436 */\
437 uint8_t *base[4];\
438 /**\
439 * 1 -> keyframe, 0-> not\
440 * - encoding: set by lavc\
441 * - decoding: set by lavc\
442 */\
443 int key_frame;\
444 \
445 /**\
446 * picture type of the frame, see ?_TYPE below.\
447 * - encoding: set by lavc for coded_picture (and set by user for input)\
448 * - decoding: set by lavc\
449 */\
450 int pict_type;\
451 \
452 /**\
453 * presentation timestamp in time_base units (time when frame should be shown to user)\
454 * if AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed\
455 * - encoding: MUST be set by user\
456 * - decoding: set by lavc\
457 */\
458 int64_t pts;\
459 \
460 /**\
461 * picture number in bitstream order.\
462 * - encoding: set by\
463 * - decoding: set by lavc\
464 */\
465 int coded_picture_number;\
466 /**\
467 * picture number in display order.\
468 * - encoding: set by\
469 * - decoding: set by lavc\
470 */\
471 int display_picture_number;\
472 \
473 /**\
474 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
475 * - encoding: set by lavc for coded_picture (and set by user for input)\
476 * - decoding: set by lavc\
477 */\
478 int quality; \
479 \
480 /**\
481 * buffer age (1->was last buffer and dint change, 2->..., ...).\
482 * set to INT_MAX if the buffer has not been used yet \
483 * - encoding: unused\
484 * - decoding: MUST be set by get_buffer()\
485 */\
486 int age;\
487 \
488 /**\
489 * is this picture used as reference\
490 * - encoding: unused\
491 * - decoding: set by lavc (before get_buffer() call))\
492 */\
493 int reference;\
494 \
495 /**\
496 * QP table\
497 * - encoding: unused\
498 * - decoding: set by lavc\
499 */\
500 int8_t *qscale_table;\
501 /**\
502 * QP store stride\
503 * - encoding: unused\
504 * - decoding: set by lavc\
505 */\
506 int qstride;\
507 \
508 /**\
509 * mbskip_table[mb]>=1 if MB didnt change\
510 * stride= mb_width = (width+15)>>4\
511 * - encoding: unused\
512 * - decoding: set by lavc\
513 */\
514 uint8_t *mbskip_table;\
515 \
516 /**\
517 * Motion vector table.\
518 * @code\
519 * example:\
520 * int mv_sample_log2= 4 - motion_subsample_log2;\
521 * int mb_width= (width+15)>>4;\
522 * int mv_stride= (mb_width << mv_sample_log2) + 1;\
523 * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
524 * @endcode\
525 * - encoding: set by user\
526 * - decoding: set by lavc\
527 */\
528 int16_t (*motion_val[2])[2];\
529 \
530 /**\
531 * Macroblock type table\
532 * mb_type_base + mb_width + 2\
533 * - encoding: set by user\
534 * - decoding: set by lavc\
535 */\
536 uint32_t *mb_type;\
537 \
538 /**\
539 * log2 of the size of the block which a single vector in motion_val represents: \
540 * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
541 * - encoding: unused\
542 * - decoding: set by lavc\
543 */\
544 uint8_t motion_subsample_log2;\
545 \
546 /**\
547 * for some private data of the user\
548 * - encoding: unused\
549 * - decoding: set by user\
550 */\
551 void *opaque;\
552 \
553 /**\
554 * error\
555 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
556 * - decoding: unused\
557 */\
558 uint64_t error[4];\
559 \
560 /**\
561 * type of the buffer (to keep track of who has to dealloc data[*])\
562 * - encoding: set by the one who allocs it\
563 * - decoding: set by the one who allocs it\
564 * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
565 */\
566 int type;\
567 \
568 /**\
569 * when decoding, this signal how much the picture must be delayed.\
570 * extra_delay = repeat_pict / (2*fps)\
571 * - encoding: unused\
572 * - decoding: set by lavc\
573 */\
574 int repeat_pict;\
575 \
576 /**\
577 * \
578 */\
579 int qscale_type;\
580 \
581 /**\
582 * The content of the picture is interlaced.\
583 * - encoding: set by user\
584 * - decoding: set by lavc (default 0)\
585 */\
586 int interlaced_frame;\
587 \
588 /**\
589 * if the content is interlaced, is top field displayed first.\
590 * - encoding: set by user\
591 * - decoding: set by lavc\
592 */\
593 int top_field_first;\
594 \
595 /**\
596 * Pan scan.\
597 * - encoding: set by user\
598 * - decoding: set by lavc\
599 */\
600 AVPanScan *pan_scan;\
601 \
602 /**\
603 * tell user application that palette has changed from previous frame.\
604 * - encoding: ??? (no palette-enabled encoder yet)\
605 * - decoding: set by lavc (default 0)\
606 */\
607 int palette_has_changed;\
608 \
609 /**\
610 * Codec suggestion on buffer type if != 0\
611 * - encoding: unused\
612 * - decoding: set by lavc (before get_buffer() call))\
613 */\
614 int buffer_hints;\
615 \
616 /**\
617 * DCT coeffitients\
618 * - encoding: unused\
619 * - decoding: set by lavc\
620 */\
621 short *dct_coeff;\
622 \
623 /**\
624 * Motion referece frame index\
625 * - encoding: set by user\
626 * - decoding: set by lavc\
627 */\
628 int8_t *ref_index[2];
629
630 #define FF_QSCALE_TYPE_MPEG1 0
631 #define FF_QSCALE_TYPE_MPEG2 1
632 #define FF_QSCALE_TYPE_H264 2
633
634 #define FF_BUFFER_TYPE_INTERNAL 1
635 #define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
636 #define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewhere else, don't dealloc image (data/base), all other tables are not shared
637 #define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, don't dealloc anything
638
639
640 #define FF_I_TYPE 1 // Intra
641 #define FF_P_TYPE 2 // Predicted
642 #define FF_B_TYPE 3 // Bi-dir predicted
643 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
644 #define FF_SI_TYPE 5
645 #define FF_SP_TYPE 6
646
647 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore)
648 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
649 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
650 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
651
652 /**
653 * Audio Video Frame.
654 */
655 typedef struct AVFrame {
656 FF_COMMON_FRAME
657 } AVFrame;
658
659 #define DEFAULT_FRAME_RATE_BASE 1001000
660
661 /**
662 * Used by av_log
663 */
664 typedef struct AVCLASS AVClass;
665 struct AVCLASS {
666 const char* class_name;
667 const char* (*item_name)(void*); /* actually passing a pointer to an AVCodecContext
668 or AVFormatContext, which begin with an AVClass.
669 Needed because av_log is in libavcodec and has no visibility
670 of AVIn/OutputFormat */
671 struct AVOption *option;
672 };
673
674 /**
675 * main external api structure.
676 */
677 typedef struct AVCodecContext {
678 /**
679 * Info on struct for av_log
680 * - set by avcodec_alloc_context
681 */
682 AVClass *av_class;
683 /**
684 * the average bitrate.
685 * - encoding: set by user. unused for constant quantizer encoding
686 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
687 */
688 int bit_rate;
689
690 /**
691 * number of bits the bitstream is allowed to diverge from the reference.
692 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
693 * - encoding: set by user. unused for constant quantizer encoding
694 * - decoding: unused
695 */
696 int bit_rate_tolerance;
697
698 /**
699 * CODEC_FLAG_*.
700 * - encoding: set by user.
701 * - decoding: set by user.
702 */
703 int flags;
704
705 /**
706 * some codecs needs additionnal format info. It is stored here
707 * - encoding: set by user.
708 * - decoding: set by lavc. (FIXME is this ok?)
709 */
710 int sub_id;
711
712 /**
713 * motion estimation algorithm used for video coding.
714 * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
715 * 8 (umh), 9 (iter) [7, 8 are x264 specific, 9 is snow specific]
716 * - encoding: MUST be set by user.
717 * - decoding: unused
718 */
719 int me_method;
720
721 /**
722 * some codecs need / can use extra-data like huffman tables.
723 * mjpeg: huffman tables
724 * rv10: additional flags
725 * mpeg4: global headers (they can be in the bitstream or here)
726 * the allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
727 * then extradata_size to avoid prolems if its read with the bitstream reader
728 * the bytewise contents of extradata must not depend on the architecture or cpu endianness
729 * - encoding: set/allocated/freed by lavc.
730 * - decoding: set/allocated/freed by user.
731 */
732 void *extradata;
733 int extradata_size;
734
735 /**
736 * this is the fundamental unit of time (in seconds) in terms
737 * of which frame timestamps are represented. for fixed-fps content,
738 * timebase should be 1/framerate and timestamp increments should be
739 * identically 1.
740 * - encoding: MUST be set by user
741 * - decoding: set by lavc.
742 */
743 AVRational time_base;
744
745 /* video only */
746 /**
747 * picture width / height.
748 * - encoding: MUST be set by user.
749 * - decoding: set by lavc.
750 * Note, for compatibility its possible to set this instead of
751 * coded_width/height before decoding
752 */
753 int width, height;
754
755 #define FF_ASPECT_EXTENDED 15
756
757 /**
758 * the number of pictures in a group of pitures, or 0 for intra_only.
759 * - encoding: set by user.
760 * - decoding: unused
761 */
762 int gop_size;
763
764 /**
765 * pixel format, see PIX_FMT_xxx.
766 * - encoding: set by user.
767 * - decoding: set by lavc.
768 */
769 enum PixelFormat pix_fmt;
770
771 /**
772 * Frame rate emulation. If not zero lower layer (i.e. format handler)
773 * has to read frames at native frame rate.
774 * - encoding: set by user.
775 * - decoding: unused.
776 */
777 int rate_emu;
778
779 /**
780 * if non NULL, 'draw_horiz_band' is called by the libavcodec
781 * decoder to draw an horizontal band. It improve cache usage. Not
782 * all codecs can do that. You must check the codec capabilities
783 * before
784 * - encoding: unused
785 * - decoding: set by user.
786 * @param height the height of the slice
787 * @param y the y position of the slice
788 * @param type 1->top field, 2->bottom field, 3->frame
789 * @param offset offset into the AVFrame.data from which the slice should be read
790 */
791 void (*draw_horiz_band)(struct AVCodecContext *s,
792 const AVFrame *src, int offset[4],
793 int y, int type, int height);
794
795 /* audio only */
796 int sample_rate; ///< samples per sec
797 int channels;
798
799 /**
800 * audio sample format.
801 * - encoding: set by user.
802 * - decoding: set by lavc.
803 */
804 enum SampleFormat sample_fmt; ///< sample format, currenly unused
805
806 /* the following data should not be initialized */
807 /**
808 * samples per packet. initialized when calling 'init'
809 */
810 int frame_size;
811 int frame_number; ///< audio or video frame number
812 int real_pict_num; ///< returns the real picture number of previous encoded frame
813
814 /**
815 * number of frames the decoded output will be delayed relative to
816 * the encoded input.
817 * - encoding: set by lavc.
818 * - decoding: unused
819 */
820 int delay;
821
822 /* - encoding parameters */
823 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
824 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
825
826 /**
827 * minimum quantizer.
828 * - encoding: set by user.
829 * - decoding: unused
830 */
831 int qmin;
832
833 /**
834 * maximum quantizer.
835 * - encoding: set by user.
836 * - decoding: unused
837 */
838 int qmax;
839
840 /**
841 * maximum quantizer difference etween frames.
842 * - encoding: set by user.
843 * - decoding: unused
844 */
845 int max_qdiff;
846
847 /**
848 * maximum number of b frames between non b frames.
849 * note: the output will be delayed by max_b_frames+1 relative to the input
850 * - encoding: set by user.
851 * - decoding: unused
852 */
853 int max_b_frames;
854
855 /**
856 * qscale factor between ip and b frames.
857 * - encoding: set by user.
858 * - decoding: unused
859 */
860 float b_quant_factor;
861
862 /** obsolete FIXME remove */
863 int rc_strategy;
864 #define FF_RC_STRATEGY_XVID 1
865
866 int b_frame_strategy;
867
868 /**
869 * hurry up amount.
870 * deprecated in favor of skip_idct and skip_frame
871 * - encoding: unused
872 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
873 */
874 int hurry_up;
875
876 struct AVCodec *codec;
877
878 void *priv_data;
879
880 /* unused, FIXME remove*/
881 int rtp_mode;
882
883 int rtp_payload_size; /* The size of the RTP payload: the coder will */
884 /* do it's best to deliver a chunk with size */
885 /* below rtp_payload_size, the chunk will start */
886 /* with a start code on some codecs like H.263 */
887 /* This doesn't take account of any particular */
888 /* headers inside the transmited RTP payload */
889
890
891 /* The RTP callback: This function is called */
892 /* every time the encoder has a packet to send */
893 /* Depends on the encoder if the data starts */
894 /* with a Start Code (it should) H.263 does. */
895 /* mb_nb contains the number of macroblocks */
896 /* encoded in the RTP payload */
897 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
898
899 /* statistics, used for 2-pass encoding */
900 int mv_bits;
901 int header_bits;
902 int i_tex_bits;
903 int p_tex_bits;
904 int i_count;
905 int p_count;
906 int skip_count;
907 int misc_bits;
908
909 /**
910 * number of bits used for the previously encoded frame.
911 * - encoding: set by lavc
912 * - decoding: unused
913 */
914 int frame_bits;
915
916 /**
917 * private data of the user, can be used to carry app specific stuff.
918 * - encoding: set by user
919 * - decoding: set by user
920 */
921 void *opaque;
922
923 char codec_name[32];
924 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
925 enum CodecID codec_id; /* see CODEC_ID_xxx */
926
927 /**
928 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
929 * this is used to workaround some encoder bugs
930 * - encoding: set by user, if not then the default based on codec_id will be used
931 * - decoding: set by user, will be converted to upper case by lavc during init
932 */
933 unsigned int codec_tag;
934
935 /**
936 * workaround bugs in encoders which sometimes cannot be detected automatically.
937 * - encoding: set by user
938 * - decoding: set by user
939 */
940 int workaround_bugs;
941 #define FF_BUG_AUTODETECT 1 ///< autodetection
942 #define FF_BUG_OLD_MSMPEG4 2
943 #define FF_BUG_XVID_ILACE 4
944 #define FF_BUG_UMP4 8
945 #define FF_BUG_NO_PADDING 16
946 #define FF_BUG_AMV 32
947 #define FF_BUG_AC_VLC 0 ///< will be removed, libavcodec can now handle these non compliant files by default
948 #define FF_BUG_QPEL_CHROMA 64
949 #define FF_BUG_STD_QPEL 128
950 #define FF_BUG_QPEL_CHROMA2 256
951 #define FF_BUG_DIRECT_BLOCKSIZE 512
952 #define FF_BUG_EDGE 1024
953 #define FF_BUG_HPEL_CHROMA 2048
954 #define FF_BUG_DC_CLIP 4096
955 #define FF_BUG_MS 8192 ///< workaround various bugs in microsofts broken decoders
956 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
957
958 /**
959 * luma single coeff elimination threshold.
960 * - encoding: set by user
961 * - decoding: unused
962 */
963 int luma_elim_threshold;
964
965 /**
966 * chroma single coeff elimination threshold.
967 * - encoding: set by user
968 * - decoding: unused
969 */
970 int chroma_elim_threshold;
971
972 /**
973 * strictly follow the std (MPEG4, ...).
974 * - encoding: set by user
975 * - decoding: unused
976 */
977 int strict_std_compliance;
978 #define FF_COMPLIANCE_VERY_STRICT 2 ///< strictly conform to a older more strict version of the spec or reference software
979 #define FF_COMPLIANCE_STRICT 1 ///< strictly conform to all the things in the spec no matter what consequences
980 #define FF_COMPLIANCE_NORMAL 0
981 #define FF_COMPLIANCE_INOFFICIAL -1 ///< allow inofficial extensions
982 #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< allow non standarized experimental things
983
984 /**
985 * qscale offset between ip and b frames.
986 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
987 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
988 * - encoding: set by user.
989 * - decoding: unused
990 */
991 float b_quant_offset;
992
993 /**
994 * error resilience higher values will detect more errors but may missdetect
995 * some more or less valid parts as errors.
996 * - encoding: unused
997 * - decoding: set by user
998 */
999 int error_resilience;
1000 #define FF_ER_CAREFUL 1
1001 #define FF_ER_COMPLIANT 2
1002 #define FF_ER_AGGRESSIVE 3
1003 #define FF_ER_VERY_AGGRESSIVE 4
1004
1005 /**
1006 * called at the beginning of each frame to get a buffer for it.
1007 * if pic.reference is set then the frame will be read later by lavc
1008 * avcodec_align_dimensions() should be used to find the required width and
1009 * height, as they normally need to be rounded up to the next multiple of 16
1010 * - encoding: unused
1011 * - decoding: set by lavc, user can override
1012 */
1013 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1014
1015 /**
1016 * called to release buffers which where allocated with get_buffer.
1017 * a released buffer can be reused in get_buffer()
1018 * pic.data[*] must be set to NULL
1019 * - encoding: unused
1020 * - decoding: set by lavc, user can override
1021 */
1022 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1023
1024 /**
1025 * if 1 the stream has a 1 frame delay during decoding.
1026 * - encoding: set by lavc
1027 * - decoding: set by lavc
1028 */
1029 int has_b_frames;
1030
1031 /**
1032 * number of bytes per packet if constant and known or 0
1033 * used by some WAV based audio codecs
1034 */
1035 int block_align;
1036
1037 int parse_only; /* - decoding only: if true, only parsing is done
1038 (function avcodec_parse_frame()). The frame
1039 data is returned. Only MPEG codecs support this now. */
1040
1041 /**
1042 * 0-> h263 quant 1-> mpeg quant.
1043 * - encoding: set by user.
1044 * - decoding: unused
1045 */
1046 int mpeg_quant;
1047
1048 /**
1049 * pass1 encoding statistics output buffer.
1050 * - encoding: set by lavc
1051 * - decoding: unused
1052 */
1053 char *stats_out;
1054
1055 /**
1056 * pass2 encoding statistics input buffer.
1057 * concatenated stuff from stats_out of pass1 should be placed here
1058 * - encoding: allocated/set/freed by user
1059 * - decoding: unused
1060 */
1061 char *stats_in;
1062
1063 /**
1064 * ratecontrol qmin qmax limiting method.
1065 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
1066 * - encoding: set by user.
1067 * - decoding: unused
1068 */
1069 float rc_qsquish;
1070
1071 float rc_qmod_amp;
1072 int rc_qmod_freq;
1073
1074 /**
1075 * ratecontrol override, see RcOverride.
1076 * - encoding: allocated/set/freed by user.
1077 * - decoding: unused
1078 */
1079 RcOverride *rc_override;
1080 int rc_override_count;
1081
1082 /**
1083 * rate control equation.
1084 * - encoding: set by user
1085 * - decoding: unused
1086 */
1087 char *rc_eq;
1088
1089 /**
1090 * maximum bitrate.
1091 * - encoding: set by user.
1092 * - decoding: unused
1093 */
1094 int rc_max_rate;
1095
1096 /**
1097 * minimum bitrate.
1098 * - encoding: set by user.
1099 * - decoding: unused
1100 */
1101 int rc_min_rate;
1102
1103 /**
1104 * decoder bitstream buffer size.
1105 * - encoding: set by user.
1106 * - decoding: unused
1107 */
1108 int rc_buffer_size;
1109 float rc_buffer_aggressivity;
1110
1111 /**
1112 * qscale factor between p and i frames.
1113 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1114 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1115 * - encoding: set by user.
1116 * - decoding: unused
1117 */
1118 float i_quant_factor;
1119
1120 /**
1121 * qscale offset between p and i frames.
1122 * - encoding: set by user.
1123 * - decoding: unused
1124 */
1125 float i_quant_offset;
1126
1127 /**
1128 * initial complexity for pass1 ratecontrol.
1129 * - encoding: set by user.
1130 * - decoding: unused
1131 */
1132 float rc_initial_cplx;
1133
1134 /**
1135 * dct algorithm, see FF_DCT_* below.
1136 * - encoding: set by user
1137 * - decoding: unused
1138 */
1139 int dct_algo;
1140 #define FF_DCT_AUTO 0
1141 #define FF_DCT_FASTINT 1
1142 #define FF_DCT_INT 2
1143 #define FF_DCT_MMX 3
1144 #define FF_DCT_MLIB 4
1145 #define FF_DCT_ALTIVEC 5
1146 #define FF_DCT_FAAN 6
1147
1148 /**
1149 * luminance masking (0-> disabled).
1150 * - encoding: set by user
1151 * - decoding: unused
1152 */
1153 float lumi_masking;
1154
1155 /**
1156 * temporary complexity masking (0-> disabled).
1157 * - encoding: set by user
1158 * - decoding: unused
1159 */
1160 float temporal_cplx_masking;
1161
1162 /**
1163 * spatial complexity masking (0-> disabled).
1164 * - encoding: set by user
1165 * - decoding: unused
1166 */
1167 float spatial_cplx_masking;
1168
1169 /**
1170 * p block masking (0-> disabled).
1171 * - encoding: set by user
1172 * - decoding: unused
1173 */
1174 float p_masking;
1175
1176 /**
1177 * darkness masking (0-> disabled).
1178 * - encoding: set by user
1179 * - decoding: unused
1180 */
1181 float dark_masking;
1182
1183
1184 /* for binary compatibility */
1185 int unused;
1186
1187 /**
1188 * idct algorithm, see FF_IDCT_* below.
1189 * - encoding: set by user
1190 * - decoding: set by user
1191 */
1192 int idct_algo;
1193 #define FF_IDCT_AUTO 0
1194 #define FF_IDCT_INT 1
1195 #define FF_IDCT_SIMPLE 2
1196 #define FF_IDCT_SIMPLEMMX 3
1197 #define FF_IDCT_LIBMPEG2MMX 4
1198 #define FF_IDCT_PS2 5
1199 #define FF_IDCT_MLIB 6
1200 #define FF_IDCT_ARM 7
1201 #define FF_IDCT_ALTIVEC 8
1202 #define FF_IDCT_SH4 9
1203 #define FF_IDCT_SIMPLEARM 10
1204 #define FF_IDCT_H264 11
1205 #define FF_IDCT_VP3 12
1206 #define FF_IDCT_IPP 13
1207 #define FF_IDCT_XVIDMMX 14
1208
1209 /**
1210 * slice count.
1211 * - encoding: set by lavc
1212 * - decoding: set by user (or 0)
1213 */
1214 int slice_count;
1215 /**
1216 * slice offsets in the frame in bytes.
1217 * - encoding: set/allocated by lavc
1218 * - decoding: set/allocated by user (or NULL)
1219 */
1220 int *slice_offset;
1221
1222 /**
1223 * error concealment flags.
1224 * - encoding: unused
1225 * - decoding: set by user
1226 */
1227 int error_concealment;
1228 #define FF_EC_GUESS_MVS 1
1229 #define FF_EC_DEBLOCK 2
1230
1231 /**
1232 * dsp_mask could be add used to disable unwanted CPU features
1233 * CPU features (i.e. MMX, SSE. ...)
1234 *
1235 * with FORCE flag you may instead enable given CPU features
1236 * (Dangerous: usable in case of misdetection, improper usage however will
1237 * result into program crash)
1238 */
1239 unsigned dsp_mask;
1240 #define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
1241 /* lower 16 bits - CPU features */
1242 #ifdef HAVE_MMX
1243 #define FF_MM_MMX 0x0001 /* standard MMX */
1244 #define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
1245 #define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
1246 #define FF_MM_SSE 0x0008 /* SSE functions */
1247 #define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
1248 #define FF_MM_3DNOWEXT 0x0020 /* AMD 3DNowExt */
1249 #endif /* HAVE_MMX */
1250 #ifdef HAVE_IWMMXT
1251 #define FF_MM_IWMMXT 0x0100 /* XScale IWMMXT */
1252 #endif /* HAVE_IWMMXT */
1253
1254 /**
1255 * bits per sample/pixel from the demuxer (needed for huffyuv).
1256 * - encoding: set by lavc
1257 * - decoding: set by user
1258 */
1259 int bits_per_sample;
1260
1261 /**
1262 * prediction method (needed for huffyuv).
1263 * - encoding: set by user
1264 * - decoding: unused
1265 */
1266 int prediction_method;
1267 #define FF_PRED_LEFT 0
1268 #define FF_PRED_PLANE 1
1269 #define FF_PRED_MEDIAN 2
1270
1271 /**
1272 * sample aspect ratio (0 if unknown).
1273 * numerator and denominator must be relative prime and smaller then 256 for some video standards
1274 * - encoding: set by user.
1275 * - decoding: set by lavc.
1276 */
1277 AVRational sample_aspect_ratio;
1278
1279 /**
1280 * the picture in the bitstream.
1281 * - encoding: set by lavc
1282 * - decoding: set by lavc
1283 */
1284 AVFrame *coded_frame;
1285
1286 /**
1287 * debug.
1288 * - encoding: set by user.
1289 * - decoding: set by user.
1290 */
1291 int debug;
1292 #define FF_DEBUG_PICT_INFO 1
1293 #define FF_DEBUG_RC 2
1294 #define FF_DEBUG_BITSTREAM 4
1295 #define FF_DEBUG_MB_TYPE 8
1296 #define FF_DEBUG_QP 16
1297 #define FF_DEBUG_MV 32
1298 #define FF_DEBUG_DCT_COEFF 0x00000040
1299 #define FF_DEBUG_SKIP 0x00000080
1300 #define FF_DEBUG_STARTCODE 0x00000100
1301 #define FF_DEBUG_PTS 0x00000200
1302 #define FF_DEBUG_ER 0x00000400
1303 #define FF_DEBUG_MMCO 0x00000800
1304 #define FF_DEBUG_BUGS 0x00001000
1305 #define FF_DEBUG_VIS_QP 0x00002000
1306 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1307
1308 /**
1309 * debug.
1310 * - encoding: set by user.
1311 * - decoding: set by user.
1312 */
1313 int debug_mv;
1314 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1315 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1316 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1317
1318 /**
1319 * error.
1320 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1321 * - decoding: unused
1322 */
1323 uint64_t error[4];
1324
1325 /**
1326 * minimum MB quantizer.
1327 * - encoding: unused
1328 * - decoding: unused
1329 */
1330 int mb_qmin;
1331
1332 /**
1333 * maximum MB quantizer.
1334 * - encoding: unused
1335 * - decoding: unused
1336 */
1337 int mb_qmax;
1338
1339 /**
1340 * motion estimation compare function.
1341 * - encoding: set by user.
1342 * - decoding: unused
1343 */
1344 int me_cmp;
1345 /**
1346 * subpixel motion estimation compare function.
1347 * - encoding: set by user.
1348 * - decoding: unused
1349 */
1350 int me_sub_cmp;
1351 /**
1352 * macroblock compare function (not supported yet).
1353 * - encoding: set by user.
1354 * - decoding: unused
1355 */
1356 int mb_cmp;
1357 /**
1358 * interlaced dct compare function
1359 * - encoding: set by user.
1360 * - decoding: unused
1361 */
1362 int ildct_cmp;
1363 #define FF_CMP_SAD 0
1364 #define FF_CMP_SSE 1
1365 #define FF_CMP_SATD 2
1366 #define FF_CMP_DCT 3
1367 #define FF_CMP_PSNR 4
1368 #define FF_CMP_BIT 5
1369 #define FF_CMP_RD 6
1370 #define FF_CMP_ZERO 7
1371 #define FF_CMP_VSAD 8
1372 #define FF_CMP_VSSE 9
1373 #define FF_CMP_NSSE 10
1374 #define FF_CMP_W53 11
1375 #define FF_CMP_W97 12
1376 #define FF_CMP_DCTMAX 13
1377 #define FF_CMP_DCT264 14
1378 #define FF_CMP_CHROMA 256
1379
1380 /**
1381 * ME diamond size & shape.
1382 * - encoding: set by user.
1383 * - decoding: unused
1384 */
1385 int dia_size;
1386
1387 /**
1388 * amount of previous MV predictors (2a+1 x 2a+1 square).
1389 * - encoding: set by user.
1390 * - decoding: unused
1391 */
1392 int last_predictor_count;
1393
1394 /**
1395 * pre pass for motion estimation.
1396 * - encoding: set by user.
1397 * - decoding: unused
1398 */
1399 int pre_me;
1400
1401 /**
1402 * motion estimation pre pass compare function.
1403 * - encoding: set by user.
1404 * - decoding: unused
1405 */
1406 int me_pre_cmp;
1407
1408 /**
1409 * ME pre pass diamond size & shape.
1410 * - encoding: set by user.
1411 * - decoding: unused
1412 */
1413 int pre_dia_size;
1414
1415 /**
1416 * subpel ME quality.
1417 * - encoding: set by user.
1418 * - decoding: unused
1419 */
1420 int me_subpel_quality;
1421
1422 /**
1423 * callback to negotiate the pixelFormat.
1424 * @param fmt is the list of formats which are supported by the codec,
1425 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1426 * the first is allways the native one
1427 * @return the choosen format
1428 * - encoding: unused
1429 * - decoding: set by user, if not set then the native format will always be choosen
1430 */
1431 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1432
1433 /**
1434 * DTG active format information (additionnal aspect ratio
1435 * information only used in DVB MPEG2 transport streams). 0 if
1436 * not set.
1437 *
1438 * - encoding: unused.
1439 * - decoding: set by decoder
1440 */
1441 int dtg_active_format;
1442 #define FF_DTG_AFD_SAME 8
1443 #define FF_DTG_AFD_4_3 9
1444 #define FF_DTG_AFD_16_9 10
1445 #define FF_DTG_AFD_14_9 11
1446 #define FF_DTG_AFD_4_3_SP_14_9 13
1447 #define FF_DTG_AFD_16_9_SP_14_9 14
1448 #define FF_DTG_AFD_SP_4_3 15
1449
1450 /**
1451 * Maximum motion estimation search range in subpel units.
1452 * if 0 then no limit
1453 *
1454 * - encoding: set by user.
1455 * - decoding: unused.
1456 */
1457 int me_range;
1458
1459 /**
1460 * intra quantizer bias.
1461 * - encoding: set by user.
1462 * - decoding: unused
1463 */
1464 int intra_quant_bias;
1465 #define FF_DEFAULT_QUANT_BIAS 999999
1466
1467 /**
1468 * inter quantizer bias.
1469 * - encoding: set by user.
1470 * - decoding: unused
1471 */
1472 int inter_quant_bias;
1473
1474 /**
1475 * color table ID.
1476 * - encoding: unused.
1477 * - decoding: which clrtable should be used for 8bit RGB images
1478 * table have to be stored somewhere FIXME
1479 */
1480 int color_table_id;
1481
1482 /**
1483 * internal_buffer count.
1484 * Don't touch, used by lavc default_get_buffer()
1485 */
1486 int internal_buffer_count;
1487
1488 /**
1489 * internal_buffers.
1490 * Don't touch, used by lavc default_get_buffer()
1491 */
1492 void *internal_buffer;
1493
1494 #define FF_LAMBDA_SHIFT 7
1495 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1496 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1497 #define FF_LAMBDA_MAX (256*128-1)
1498
1499 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1500 /**
1501 * global quality for codecs which cannot change it per frame.
1502 * this should be proportional to MPEG1/2/4 qscale.
1503 * - encoding: set by user.
1504 * - decoding: unused
1505 */
1506 int global_quality;
1507
1508 #define FF_CODER_TYPE_VLC 0
1509 #define FF_CODER_TYPE_AC 1
1510 /**
1511 * coder type
1512 * - encoding: set by user.
1513 * - decoding: unused
1514 */
1515 int coder_type;
1516
1517 /**
1518 * context model
1519 * - encoding: set by user.
1520 * - decoding: unused
1521 */
1522 int context_model;
1523 #if 0
1524 /**
1525 *
1526 * - encoding: unused
1527 * - decoding: set by user.
1528 */
1529 uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1530 #endif
1531
1532 /**
1533 * slice flags
1534 * - encoding: unused
1535 * - decoding: set by user.
1536 */
1537 int slice_flags;
1538 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1539 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1540 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1541
1542 /**
1543 * XVideo Motion Acceleration
1544 * - encoding: forbidden
1545 * - decoding: set by decoder
1546 */
1547 int xvmc_acceleration;
1548
1549 /**
1550 * macroblock decision mode
1551 * - encoding: set by user.
1552 * - decoding: unused
1553 */
1554 int mb_decision;
1555 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1556 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1557 #define FF_MB_DECISION_RD 2 ///< rate distoration
1558
1559 /**
1560 * custom intra quantization matrix
1561 * - encoding: set by user, can be NULL
1562 * - decoding: set by lavc
1563 */
1564 uint16_t *intra_matrix;
1565
1566 /**
1567 * custom inter quantization matrix
1568 * - encoding: set by user, can be NULL
1569 * - decoding: set by lavc
1570 */
1571 uint16_t *inter_matrix;
1572
1573 /**
1574 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1575 * this is used to workaround some encoder bugs
1576 * - encoding: unused
1577 * - decoding: set by user, will be converted to upper case by lavc during init
1578 */
1579 unsigned int stream_codec_tag;
1580
1581 /**
1582 * scene change detection threshold.
1583 * 0 is default, larger means fewer detected scene changes
1584 * - encoding: set by user.
1585 * - decoding: unused
1586 */
1587 int scenechange_threshold;
1588
1589 /**
1590 * minimum lagrange multipler
1591 * - encoding: set by user.
1592 * - decoding: unused
1593 */
1594 int lmin;
1595
1596 /**
1597 * maximum lagrange multipler
1598 * - encoding: set by user.
1599 * - decoding: unused
1600 */
1601 int lmax;
1602
1603 /**
1604 * Palette control structure
1605 * - encoding: ??? (no palette-enabled encoder yet)
1606 * - decoding: set by user.
1607 */
1608 struct AVPaletteControl *palctrl;
1609
1610 /**
1611 * noise reduction strength
1612 * - encoding: set by user.
1613 * - decoding: unused
1614 */
1615 int noise_reduction;
1616
1617 /**
1618 * called at the beginning of a frame to get cr buffer for it.
1619 * buffer type (size, hints) must be the same. lavc won't check it.
1620 * lavc will pass previous buffer in pic, function should return
1621 * same buffer or new buffer with old frame "painted" into it.
1622 * if pic.data[0] == NULL must behave like get_buffer().
1623 * - encoding: unused
1624 * - decoding: set by lavc, user can override
1625 */
1626 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1627
1628 /**
1629 * number of bits which should be loaded into the rc buffer before decoding starts
1630 * - encoding: set by user.
1631 * - decoding: unused
1632 */
1633 int rc_initial_buffer_occupancy;
1634
1635 /**
1636 *
1637 * - encoding: set by user.
1638 * - decoding: unused
1639 */
1640 int inter_threshold;
1641
1642 /**
1643 * CODEC_FLAG2_*.
1644 * - encoding: set by user.
1645 * - decoding: set by user.
1646 */
1647 int flags2;
1648
1649 /**
1650 * simulates errors in the bitstream to test error concealment.
1651 * - encoding: set by user.
1652 * - decoding: unused.
1653 */
1654 int error_rate;
1655
1656 /**
1657 * MP3 antialias algorithm, see FF_AA_* below.
1658 * - encoding: unused
1659 * - decoding: set by user
1660 */
1661 int antialias_algo;
1662 #define FF_AA_AUTO 0
1663 #define FF_AA_FASTINT 1 //not implemented yet
1664 #define FF_AA_INT 2
1665 #define FF_AA_FLOAT 3
1666 /**
1667 * Quantizer noise shaping.
1668 * - encoding: set by user
1669 * - decoding: unused
1670 */
1671 int quantizer_noise_shaping;
1672
1673 /**
1674 * Thread count.
1675 * is used to decide how many independant tasks should be passed to execute()
1676 * - encoding: set by user
1677 * - decoding: set by user
1678 */
1679 int thread_count;
1680
1681 /**
1682 * the codec may call this to execute several independant things. it will return only after
1683 * finishing all tasks, the user may replace this with some multithreaded implementation, the
1684 * default implementation will execute the parts serially
1685 * @param count the number of things to execute
1686 * - encoding: set by lavc, user can override
1687 * - decoding: set by lavc, user can override
1688 */
1689 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1690
1691 /**
1692 * Thread opaque.
1693 * can be used by execute() to store some per AVCodecContext stuff.
1694 * - encoding: set by execute()
1695 * - decoding: set by execute()
1696 */
1697 void *thread_opaque;
1698
1699 /**
1700 * Motion estimation threshold. under which no motion estimation is
1701 * performed, but instead the user specified motion vectors are used
1702 *
1703 * - encoding: set by user
1704 * - decoding: unused
1705 */
1706 int me_threshold;
1707
1708 /**
1709 * Macroblock threshold. under which the user specified macroblock types will be used
1710 * - encoding: set by user
1711 * - decoding: unused
1712 */
1713 int mb_threshold;
1714
1715 /**
1716 * precision of the intra dc coefficient - 8.
1717 * - encoding: set by user
1718 * - decoding: unused
1719 */
1720 int intra_dc_precision;
1721
1722 /**
1723 * noise vs. sse weight for the nsse comparsion function.
1724 * - encoding: set by user
1725 * - decoding: unused
1726 */
1727 int nsse_weight;
1728
1729 /**
1730 * number of macroblock rows at the top which are skipped.
1731 * - encoding: unused
1732 * - decoding: set by user
1733 */
1734 int skip_top;
1735
1736 /**
1737 * number of macroblock rows at the bottom which are skipped.
1738 * - encoding: unused
1739 * - decoding: set by user
1740 */
1741 int skip_bottom;
1742
1743 /**
1744 * profile
1745 * - encoding: set by user
1746 * - decoding: set by lavc
1747 */
1748 int profile;
1749 #define FF_PROFILE_UNKNOWN -99
1750
1751 /**
1752 * level
1753 * - encoding: set by user
1754 * - decoding: set by lavc
1755 */
1756 int level;
1757 #define FF_LEVEL_UNKNOWN -99
1758
1759 /**
1760 * low resolution decoding. 1-> 1/2 size, 2->1/4 size
1761 * - encoding: unused
1762 * - decoding: set by user
1763 */
1764 int lowres;
1765
1766 /**
1767 * bitsream width / height. may be different from width/height if lowres
1768 * or other things are used
1769 * - encoding: unused
1770 * - decoding: set by user before init if known, codec should override / dynamically change if needed
1771 */
1772 int coded_width, coded_height;
1773
1774 /**
1775 * frame skip threshold
1776 * - encoding: set by user
1777 * - decoding: unused
1778 */
1779 int frame_skip_threshold;
1780
1781 /**
1782 * frame skip factor
1783 * - encoding: set by user
1784 * - decoding: unused
1785 */
1786 int frame_skip_factor;
1787
1788 /**
1789 * frame skip exponent
1790 * - encoding: set by user
1791 * - decoding: unused
1792 */
1793 int frame_skip_exp;
1794
1795 /**
1796 * frame skip comparission function
1797 * - encoding: set by user.
1798 * - decoding: unused
1799 */
1800 int frame_skip_cmp;
1801
1802 /**
1803 * border processing masking. raises the quantizer for mbs on the borders
1804 * of the picture.
1805 * - encoding: set by user
1806 * - decoding: unused
1807 */
1808 float border_masking;
1809
1810 /**
1811 * minimum MB lagrange multipler.
1812 * - encoding: set by user.
1813 * - decoding: unused
1814 */
1815 int mb_lmin;
1816
1817 /**
1818 * maximum MB lagrange multipler.
1819 * - encoding: set by user.
1820 * - decoding: unused
1821 */
1822 int mb_lmax;
1823
1824 /**
1825 *
1826 * - encoding: set by user.
1827 * - decoding: unused
1828 */
1829 int me_penalty_compensation;
1830
1831 /**
1832 *
1833 * - encoding: unused
1834 * - decoding: set by user.
1835 */
1836 enum AVDiscard skip_loop_filter;
1837
1838 /**
1839 *
1840 * - encoding: unused
1841 * - decoding: set by user.
1842 */
1843 enum AVDiscard skip_idct;
1844
1845 /**
1846 *
1847 * - encoding: unused
1848 * - decoding: set by user.
1849 */
1850 enum AVDiscard skip_frame;
1851
1852 /**
1853 *
1854 * - encoding: set by user.
1855 * - decoding: unused
1856 */
1857 int bidir_refine;
1858
1859 /**
1860 *
1861 * - encoding: set by user.
1862 * - decoding: unused
1863 */
1864 int brd_scale;
1865
1866 /**
1867 * constant rate factor - quality-based VBR - values ~correspond to qps
1868 * - encoding: set by user.
1869 * - decoding: unused
1870 */
1871 int crf;
1872
1873 /**
1874 * constant quantization parameter rate control method
1875 * - encoding: set by user.
1876 * - decoding: unused
1877 */
1878 int cqp;
1879
1880 /**
1881 * minimum gop size
1882 * - encoding: set by user.
1883 * - decoding: unused
1884 */
1885 int keyint_min;
1886
1887 /**
1888 * number of reference frames
1889 * - encoding: set by user.
1890 * - decoding: unused
1891 */
1892 int refs;
1893
1894 /**
1895 * chroma qp offset from luma
1896 * - encoding: set by user.
1897 * - decoding: unused
1898 */
1899 int chromaoffset;
1900
1901 /**
1902 * influences how often b-frames are used
1903 * - encoding: set by user.
1904 * - decoding: unused
1905 */
1906 int bframebias;
1907
1908 /**
1909 * trellis RD quantization
1910 * - encoding: set by user.
1911 * - decoding: unused
1912 */
1913 int trellis;
1914
1915 /**
1916 * reduce fluctuations in qp (before curve compression)
1917 * - encoding: set by user.
1918 * - decoding: unused
1919 */
1920 float complexityblur;
1921
1922 /**
1923 * in-loop deblocking filter alphac0 parameter
1924 * alpha is in the range -6...6
1925 * - encoding: set by user.
1926 * - decoding: unused
1927 */
1928 int deblockalpha;
1929
1930 /**
1931 * in-loop deblocking filter beta parameter
1932 * beta is in the range -6...6
1933 * - encoding: set by user.
1934 * - decoding: unused
1935 */
1936 int deblockbeta;
1937
1938 /**
1939 * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
1940 * - encoding: set by user.
1941 * - decoding: unused
1942 */
1943 int partitions;
1944 #define X264_PART_I4X4 0x001 /* Analyse i4x4 */
1945 #define X264_PART_I8X8 0x002 /* Analyse i8x8 (requires 8x8 transform) */
1946 #define X264_PART_P8X8 0x010 /* Analyse p16x8, p8x16 and p8x8 */
1947 #define X264_PART_P4X4 0x020 /* Analyse p8x4, p4x8, p4x4 */
1948 #define X264_PART_B8X8 0x100 /* Analyse b16x8, b8x16 and b8x8 */
1949
1950 /**
1951 * direct mv prediction mode - 0 (none), 1 (spatial), 2 (temporal)
1952 * - encoding: set by user.
1953 * - decoding: unused
1954 */
1955 int directpred;
1956
1957 /**
1958 * audio cutoff bandwidth (0 means "automatic") . Currently used only by FAAC
1959 * - encoding: set by user.
1960 * - decoding: unused
1961 */
1962 int cutoff;
1963
1964 /**
1965 * multiplied by qscale for each frame and added to scene_change_score
1966 * - encoding: set by user.
1967 * - decoding: unused
1968 */
1969 int scenechange_factor;
1970 } AVCodecContext;
1971
1972 /**
1973 * AVCodec.
1974 */
1975 typedef struct AVCodec {
1976 const char *name;
1977 enum CodecType type;
1978 enum CodecID id;
1979 int priv_data_size;
1980 int (*init)(AVCodecContext *);
1981 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
1982 int (*close)(AVCodecContext *);
1983 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
1984 uint8_t *buf, int buf_size);
1985 int capabilities;
1986 #if LIBAVCODEC_VERSION_INT < ((50<<16)+(0<<8)+0)
1987 void *dummy; // FIXME remove next time we break binary compatibility
1988 #endif
1989 struct AVCodec *next;
1990 void (*flush)(AVCodecContext *);
1991 const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
1992 const enum PixelFormat *pix_fmts; ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
1993 } AVCodec;
1994
1995 /**
1996 * four components are given, that's all.
1997 * the last component is alpha
1998 */
1999 typedef struct AVPicture {
2000 uint8_t *data[4];
2001 int linesize[4]; ///< number of bytes per line
2002 } AVPicture;
2003
2004 /**
2005 * AVPaletteControl
2006 * This structure defines a method for communicating palette changes
2007 * between and demuxer and a decoder.
2008 */
2009 #define AVPALETTE_SIZE 1024
2010 #define AVPALETTE_COUNT 256
2011 typedef struct AVPaletteControl {
2012
2013 /* demuxer sets this to 1 to indicate the palette has changed;
2014 * decoder resets to 0 */
2015 int palette_changed;
2016
2017 /* 4-byte ARGB palette entries, stored in native byte order; note that
2018 * the individual palette components should be on a 8-bit scale; if
2019 * the palette data comes from a IBM VGA native format, the component
2020 * data is probably 6 bits in size and needs to be scaled */
2021 unsigned int palette[AVPALETTE_COUNT];
2022
2023 } AVPaletteControl;
2024
2025 typedef struct AVSubtitleRect {
2026 uint16_t x;
2027 uint16_t y;
2028 uint16_t w;
2029 uint16_t h;
2030 uint16_t nb_colors;
2031 int linesize;
2032 uint32_t *rgba_palette;
2033 uint8_t *bitmap;
2034 } AVSubtitleRect;
2035
2036 typedef struct AVSubtitle {
2037 uint16_t format; /* 0 = graphics */
2038 uint32_t start_display_time; /* relative to packet pts, in ms */
2039 uint32_t end_display_time; /* relative to packet pts, in ms */
2040 uint32_t num_rects;
2041 AVSubtitleRect *rects;
2042 } AVSubtitle;
2043
2044 extern AVCodec ac3_encoder;
2045 extern AVCodec mp2_encoder;
2046 extern AVCodec mp3lame_encoder;
2047 extern AVCodec oggvorbis_encoder;
2048 extern AVCodec oggtheora_encoder;
2049 extern AVCodec faac_encoder;
2050 extern AVCodec xvid_encoder;
2051 extern AVCodec mpeg1video_encoder;
2052 extern AVCodec mpeg2video_encoder;
2053 extern AVCodec h261_encoder;
2054 extern AVCodec h263_encoder;
2055 extern AVCodec h263p_encoder;
2056 extern AVCodec flv_encoder;
2057 extern AVCodec rv10_encoder;
2058 extern AVCodec rv20_encoder;
2059 extern AVCodec dvvideo_encoder;
2060 extern AVCodec mjpeg_encoder;
2061 extern AVCodec ljpeg_encoder;
2062 extern AVCodec jpegls_encoder;
2063 extern AVCodec png_encoder;
2064 extern AVCodec ppm_encoder;
2065 extern AVCodec pgm_encoder;
2066 extern AVCodec pgmyuv_encoder;
2067 extern AVCodec pbm_encoder;
2068 extern AVCodec pam_encoder;
2069 extern AVCodec mpeg4_encoder;
2070 extern AVCodec msmpeg4v1_encoder;
2071 extern AVCodec msmpeg4v2_encoder;
2072 extern AVCodec msmpeg4v3_encoder;
2073 extern AVCodec wmv1_encoder;
2074 extern AVCodec wmv2_encoder;
2075 extern AVCodec huffyuv_encoder;
2076 extern AVCodec ffvhuff_encoder;
2077 extern AVCodec h264_encoder;
2078 extern AVCodec asv1_encoder;
2079 extern AVCodec asv2_encoder;
2080 extern AVCodec vcr1_encoder;
2081 extern AVCodec ffv1_encoder;
2082 extern AVCodec snow_encoder;
2083 extern AVCodec mdec_encoder;
2084 extern AVCodec zlib_encoder;
2085 extern AVCodec sonic_encoder;
2086 extern AVCodec sonic_ls_encoder;
2087 extern AVCodec svq1_encoder;
2088 extern AVCodec x264_encoder;
2089
2090 extern AVCodec h263_decoder;
2091 extern AVCodec h261_decoder;
2092 extern AVCodec mpeg4_decoder;
2093 extern AVCodec msmpeg4v1_decoder;
2094 extern AVCodec msmpeg4v2_decoder;
2095 extern AVCodec msmpeg4v3_decoder;
2096 extern AVCodec wmv1_decoder;
2097 extern AVCodec wmv2_decoder;
2098 extern AVCodec vc9_decoder;
2099 extern AVCodec wmv3_decoder;
2100 extern AVCodec mpeg1video_decoder;
2101 extern AVCodec mpeg2video_decoder;
2102 extern AVCodec mpegvideo_decoder;
2103 extern AVCodec mpeg_xvmc_decoder;
2104 extern AVCodec h263i_decoder;
2105 extern AVCodec flv_decoder;
2106 extern AVCodec rv10_decoder;
2107 extern AVCodec rv20_decoder;
2108 extern AVCodec rv30_decoder;
2109 extern AVCodec rv40_decoder;
2110 extern AVCodec svq1_decoder;
2111 extern AVCodec svq3_decoder;
2112 extern AVCodec dvvideo_decoder;
2113 extern AVCodec wmav1_decoder;
2114 extern AVCodec wmav2_decoder;
2115 extern AVCodec mjpeg_decoder;
2116 extern AVCodec mjpegb_decoder;
2117 extern AVCodec sp5x_decoder;
2118 extern AVCodec png_decoder;
2119 extern AVCodec mp2_decoder;
2120 extern AVCodec mp3_decoder;
2121 extern AVCodec mp3adu_decoder;
2122 extern AVCodec mp3on4_decoder;
2123 extern AVCodec qdm2_decoder;
2124 extern AVCodec cook_decoder;
2125 extern AVCodec truespeech_decoder;
2126 extern AVCodec tta_decoder;
2127 extern AVCodec mace3_decoder;
2128 extern AVCodec mace6_decoder;
2129 extern AVCodec huffyuv_decoder;
2130 extern AVCodec ffvhuff_decoder;
2131 extern AVCodec oggvorbis_decoder;
2132 extern AVCodec oggtheora_decoder;
2133 extern AVCodec cyuv_decoder;
2134 extern AVCodec h264_decoder;
2135 extern AVCodec indeo3_decoder;
2136 extern AVCodec vp3_decoder;
2137 extern AVCodec theora_decoder;
2138 extern AVCodec amr_nb_decoder;
2139 extern AVCodec amr_nb_encoder;
2140 extern AVCodec amr_wb_encoder;
2141 extern AVCodec amr_wb_decoder;
2142 extern AVCodec aac_decoder;
2143 extern AVCodec mpeg4aac_decoder;
2144 extern AVCodec asv1_decoder;
2145 extern AVCodec asv2_decoder;
2146 extern AVCodec vcr1_decoder;
2147 extern AVCodec cljr_decoder;
2148 extern AVCodec ffv1_decoder;
2149 extern AVCodec snow_decoder;
2150 extern AVCodec fourxm_decoder;
2151 extern AVCodec mdec_decoder;
2152 extern AVCodec roq_decoder;
2153 extern AVCodec interplay_video_decoder;
2154 extern AVCodec xan_wc3_decoder;
2155 extern AVCodec rpza_decoder;
2156 extern AVCodec cinepak_decoder;
2157 extern AVCodec msrle_decoder;
2158 extern AVCodec msvideo1_decoder;
2159 extern AVCodec vqa_decoder;
2160 extern AVCodec idcin_decoder;
2161 extern AVCodec eightbps_decoder;
2162 extern AVCodec smc_decoder;
2163 extern AVCodec flic_decoder;
2164 extern AVCodec vmdvideo_decoder;
2165 extern AVCodec vmdaudio_decoder;
2166 extern AVCodec truemotion1_decoder;
2167 extern AVCodec truemotion2_decoder;
2168 extern AVCodec mszh_decoder;
2169 extern AVCodec zlib_decoder;
2170 extern AVCodec ra_144_decoder;
2171 extern AVCodec ra_288_decoder;
2172 extern AVCodec roq_dpcm_decoder;
2173 extern AVCodec interplay_dpcm_decoder;
2174 extern AVCodec xan_dpcm_decoder;
2175 extern AVCodec sol_dpcm_decoder;
2176 extern AVCodec sonic_decoder;
2177 extern AVCodec qtrle_decoder;
2178 extern AVCodec flac_decoder;
2179 extern AVCodec tscc_decoder;
2180 extern AVCodec cscd_decoder;
2181 extern AVCodec nuv_decoder;
2182 extern AVCodec ulti_decoder;
2183 extern AVCodec qdraw_decoder;
2184 extern AVCodec xl_decoder;
2185 extern AVCodec qpeg_decoder;
2186 extern AVCodec shorten_decoder;
2187 extern AVCodec loco_decoder;
2188 extern AVCodec wnv1_decoder;
2189 extern AVCodec aasc_decoder;
2190 extern AVCodec alac_decoder;
2191 extern AVCodec ws_snd1_decoder;
2192 extern AVCodec indeo2_decoder;
2193 extern AVCodec vorbis_decoder;
2194 extern AVCodec fraps_decoder;
2195 extern AVCodec libgsm_encoder;
2196 extern AVCodec libgsm_decoder;
2197 extern AVCodec bmp_decoder;
2198 extern AVCodec mmvideo_decoder;
2199 extern AVCodec zmbv_decoder;
2200 extern AVCodec avs_decoder;
2201 extern AVCodec smacker_decoder;
2202 extern AVCodec smackaud_decoder;
2203
2204 /* pcm codecs */
2205 #define PCM_CODEC(id, name) \
2206 extern AVCodec name ## _decoder; \
2207 extern AVCodec name ## _encoder
2208
2209 PCM_CODEC(CODEC_ID_PCM_S32LE, pcm_s32le);
2210 PCM_CODEC(CODEC_ID_PCM_S32BE, pcm_s32be);
2211 PCM_CODEC(CODEC_ID_PCM_U32LE, pcm_u32le);
2212 PCM_CODEC(CODEC_ID_PCM_U32BE, pcm_u32be);
2213 PCM_CODEC(CODEC_ID_PCM_S24LE, pcm_s24le);
2214 PCM_CODEC(CODEC_ID_PCM_S24BE, pcm_s24be);
2215 PCM_CODEC(CODEC_ID_PCM_U24LE, pcm_u24le);
2216 PCM_CODEC(CODEC_ID_PCM_U24BE, pcm_u24be);
2217 PCM_CODEC(CODEC_ID_PCM_S24DAUD, pcm_s24daud);
2218 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
2219 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
2220 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
2221 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
2222 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
2223 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
2224 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
2225 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
2226
2227 /* adpcm codecs */
2228
2229 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
2230 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
2231 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
2232 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
2233 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
2234 PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
2235 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
2236 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
2237 PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
2238 PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
2239 PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
2240 PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
2241 PCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
2242 PCM_CODEC(CODEC_ID_ADPCM_SWF, adpcm_swf);
2243 PCM_CODEC(CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha);
2244 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4);
2245 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3);
2246 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_2, adpcm_sbpro_2);
2247
2248 #undef PCM_CODEC
2249
2250 /* dummy raw video codec */
2251 extern AVCodec rawvideo_encoder;
2252 extern AVCodec rawvideo_decoder;
2253
2254 /* the following codecs use external GPL libs */
2255 extern AVCodec ac3_decoder;
2256 extern AVCodec dts_decoder;
2257
2258 /* subtitles */
2259 extern AVCodec dvdsub_encoder;
2260 extern AVCodec dvdsub_decoder;
2261 extern AVCodec dvbsub_encoder;
2262 extern AVCodec dvbsub_decoder;
2263
2264 /* resample.c */
2265
2266 struct ReSampleContext;
2267 struct AVResampleContext;
2268
2269 typedef struct ReSampleContext ReSampleContext;
2270
2271 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2272 int output_rate, int input_rate);
2273 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2274 void audio_resample_close(ReSampleContext *s);
2275
2276 struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2277 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2278 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2279 void av_resample_close(struct AVResampleContext *c);
2280
2281 /* YUV420 format is assumed ! */
2282
2283 struct ImgReSampleContext;
2284
2285 typedef struct ImgReSampleContext ImgReSampleContext;
2286
2287 ImgReSampleContext *img_resample_init(int output_width, int output_height,
2288 int input_width, int input_height);
2289
2290 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
2291 int iwidth, int iheight,
2292 int topBand, int bottomBand,
2293 int leftBand, int rightBand,
2294 int padtop, int padbottom,
2295 int padleft, int padright);
2296
2297
2298 void img_resample(ImgReSampleContext *s,
2299 AVPicture *output, const AVPicture *input);
2300
2301 void img_resample_close(ImgReSampleContext *s);
2302
2303 /**
2304 * Allocate memory for a picture. Call avpicture_free to free it.
2305 *
2306 * @param picture the picture to be filled in.
2307 * @param pix_fmt the format of the picture.
2308 * @param width the width of the picture.
2309 * @param height the height of the picture.
2310 * @return 0 if successful, -1 if not.
2311 */
2312 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2313
2314 /* Free a picture previously allocated by avpicture_alloc. */
2315 void avpicture_free(AVPicture *picture);
2316
2317 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2318 int pix_fmt, int width, int height);
2319 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2320 unsigned char *dest, int dest_size);
2321 int avpicture_get_size(int pix_fmt, int width, int height);
2322 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2323 const char *avcodec_get_pix_fmt_name(int pix_fmt);
2324 void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2325 enum PixelFormat avcodec_get_pix_fmt(const char* name);
2326 unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2327
2328 #define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
2329 #define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
2330 #define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
2331 #define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
2332 #define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
2333 #define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
2334
2335 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2336 int has_alpha);
2337 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2338 int has_alpha, int *loss_ptr);
2339
2340 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
2341 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
2342 int img_get_alpha_info(const AVPicture *src,
2343 int pix_fmt, int width, int height);
2344
2345 /* convert among pixel formats */
2346 int img_convert(AVPicture *dst, int dst_pix_fmt,
2347 const AVPicture *src, int pix_fmt,
2348 int width, int height);
2349
2350 /* deinterlace a picture */
2351 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2352 int pix_fmt, int width, int height);
2353
2354 /* external high level API */
2355
2356 extern AVCodec *first_avcodec;
2357
2358 /* returns LIBAVCODEC_VERSION_INT constant */
2359 unsigned avcodec_version(void);
2360 /* returns LIBAVCODEC_BUILD constant */
2361 unsigned avcodec_build(void);
2362 void avcodec_init(void);
2363
2364 void register_avcodec(AVCodec *format);
2365 AVCodec *avcodec_find_encoder(enum CodecID id);
2366 AVCodec *avcodec_find_encoder_by_name(const char *name);
2367 AVCodec *avcodec_find_decoder(enum CodecID id);
2368 AVCodec *avcodec_find_decoder_by_name(const char *name);
2369 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2370
2371 void avcodec_get_context_defaults(AVCodecContext *s);
2372 AVCodecContext *avcodec_alloc_context(void);
2373 void avcodec_get_frame_defaults(AVFrame *pic);
2374 AVFrame *avcodec_alloc_frame(void);
2375
2376 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2377 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2378 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2379 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2380 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2381 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2382
2383 int avcodec_thread_init(AVCodecContext *s, int thread_count);
2384 void avcodec_thread_free(AVCodecContext *s);
2385 int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2386 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2387 //FIXME func typedef
2388
2389 /**
2390 * opens / inits the AVCodecContext.
2391 * not thread save!
2392 */
2393 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2394
2395 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2396 int *frame_size_ptr,
2397 uint8_t *buf, int buf_size);
2398 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2399 int *got_picture_ptr,
2400 uint8_t *buf, int buf_size);
2401 int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
2402 int *got_sub_ptr,
2403 const uint8_t *buf, int buf_size);
2404 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2405 int *data_size_ptr,
2406 uint8_t *buf, int buf_size);
2407 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2408 const short *samples);
2409 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2410 const AVFrame *pict);
2411 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2412 const AVSubtitle *sub);
2413
2414 int avcodec_close(AVCodecContext *avctx);
2415
2416 void avcodec_register_all(void);
2417
2418 void avcodec_flush_buffers(AVCodecContext *avctx);
2419
2420 void avcodec_default_free_buffers(AVCodecContext *s);
2421
2422 /* misc usefull functions */
2423
2424 /**
2425 * returns a single letter to describe the picture type
2426 */
2427 char av_get_pict_type_char(int pict_type);
2428
2429
2430 /* frame parsing */
2431 typedef struct AVCodecParserContext {
2432 void *priv_data;
2433 struct AVCodecParser *parser;
2434 int64_t frame_offset; /* offset of the current frame */
2435 int64_t cur_offset; /* current offset
2436 (incremented by each av_parser_parse()) */
2437 int64_t last_frame_offset; /* offset of the last frame */
2438 /* video info */
2439 int pict_type; /* XXX: put it back in AVCodecContext */
2440 int repeat_pict; /* XXX: put it back in AVCodecContext */
2441 int64_t pts; /* pts of the current frame */
2442 int64_t dts; /* dts of the current frame */
2443
2444 /* private data */
2445 int64_t last_pts;
2446 int64_t last_dts;
2447 int fetch_timestamp;
2448
2449 #define AV_PARSER_PTS_NB 4
2450 int cur_frame_start_index;
2451 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2452 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2453 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2454
2455 int flags;
2456 #define PARSER_FLAG_COMPLETE_FRAMES 0x0001
2457 } AVCodecParserContext;
2458
2459 typedef struct AVCodecParser {
2460 int codec_ids[5]; /* several codec IDs are permitted */
2461 int priv_data_size;
2462 int (*parser_init)(AVCodecParserContext *s);
2463 int (*parser_parse)(AVCodecParserContext *s,
2464 AVCodecContext *avctx,
2465 uint8_t **poutbuf, int *poutbuf_size,
2466 const uint8_t *buf, int buf_size);
2467 void (*parser_close)(AVCodecParserContext *s);
2468 int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
2469 struct AVCodecParser *next;
2470 } AVCodecParser;
2471
2472 extern AVCodecParser *av_first_parser;
2473
2474 void av_register_codec_parser(AVCodecParser *parser);
2475 AVCodecParserContext *av_parser_init(int codec_id);
2476 int av_parser_parse(AVCodecParserContext *s,
2477 AVCodecContext *avctx,
2478 uint8_t **poutbuf, int *poutbuf_size,
2479 const uint8_t *buf, int buf_size,
2480 int64_t pts, int64_t dts);
2481 int av_parser_change(AVCodecParserContext *s,
2482 AVCodecContext *avctx,
2483 uint8_t **poutbuf, int *poutbuf_size,
2484 const uint8_t *buf, int buf_size, int keyframe);
2485 void av_parser_close(AVCodecParserContext *s);
2486
2487 extern AVCodecParser mpegvideo_parser;
2488 extern AVCodecParser mpeg4video_parser;
2489 extern AVCodecParser h261_parser;
2490 extern AVCodecParser h263_parser;
2491 extern AVCodecParser h264_parser;
2492 extern AVCodecParser mjpeg_parser;
2493 extern AVCodecParser pnm_parser;
2494 extern AVCodecParser mpegaudio_parser;
2495 extern AVCodecParser ac3_parser;
2496 extern AVCodecParser dvdsub_parser;
2497 extern AVCodecParser dvbsub_parser;
2498 extern AVCodecParser aac_parser;
2499
2500 /* memory */
2501 void *av_malloc(unsigned int size);
2502 void *av_mallocz(unsigned int size);
2503 void *av_realloc(void *ptr, unsigned int size);
2504 void av_free(void *ptr);
2505 char *av_strdup(const char *s);
2506 void av_freep(void *ptr);
2507 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2508 /* for static data only */
2509 /* call av_free_static to release all staticaly allocated tables */
2510 void av_free_static(void);
2511 void *av_mallocz_static(unsigned int size);
2512 void *av_realloc_static(void *ptr, unsigned int size);
2513
2514 /* add by bero : in adx.c */
2515 int is_adx(const unsigned char *buf,size_t bufsize);
2516
2517 void img_copy(AVPicture *dst, const AVPicture *src,
2518 int pix_fmt, int width, int height);
2519
2520 int img_crop(AVPicture *dst, const AVPicture *src,
2521 int pix_fmt, int top_band, int left_band);
2522
2523 /* av_log API */
2524
2525 #include <stdarg.h>
2526
2527 #define AV_LOG_QUIET -1
2528 #define AV_LOG_ERROR 0
2529 #define AV_LOG_INFO 1
2530 #define AV_LOG_DEBUG 2
2531
2532 #ifdef __GNUC__
2533 extern void av_log(void*, int level, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 3, 4)));
2534 #else
2535 extern void av_log(void*, int level, const char *fmt, ...);
2536 #endif
2537
2538 extern void av_vlog(void*, int level, const char *fmt, va_list);
2539 extern int av_log_get_level(void);
2540 extern void av_log_set_level(int);
2541 extern void av_log_set_callback(void (*)(void*, int, const char*, va_list));
2542
2543 /* endian macros */
2544 #if !defined(BE_16) || !defined(BE_32) || !defined(LE_16) || !defined(LE_32)
2545 #define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
2546 #define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
2547 (((uint8_t*)(x))[1] << 16) | \
2548 (((uint8_t*)(x))[2] << 8) | \
2549 ((uint8_t*)(x))[3])
2550 #define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
2551 #define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \
2552 (((uint8_t*)(x))[2] << 16) | \
2553 (((uint8_t*)(x))[1] << 8) | \
2554 ((uint8_t*)(x))[0])
2555 #endif
2556
2557 extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
2558
2559 #ifdef __cplusplus
2560 }
2561 #endif
2562
2563 #endif /* AVCODEC_H */