Added codec id for QCELP.
[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 #define AV_STRINGIFY(s) AV_TOSTRING(s)
18 #define AV_TOSTRING(s) #s
19
20 #define LIBAVCODEC_VERSION_INT ((51<<16)+(11<<8)+0)
21 #define LIBAVCODEC_VERSION 51.11.0
22 #define LIBAVCODEC_BUILD LIBAVCODEC_VERSION_INT
23
24 #define LIBAVCODEC_IDENT "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
25
26 #define AV_NOPTS_VALUE int64_t_C(0x8000000000000000)
27 #define AV_TIME_BASE 1000000
28 #define AV_TIME_BASE_Q (AVRational){1, AV_TIME_BASE}
29
30 enum CodecID {
31 CODEC_ID_NONE,
32 CODEC_ID_MPEG1VIDEO,
33 CODEC_ID_MPEG2VIDEO, /* prefered ID for MPEG Video 1 or 2 decoding */
34 CODEC_ID_MPEG2VIDEO_XVMC,
35 CODEC_ID_H261,
36 CODEC_ID_H263,
37 CODEC_ID_RV10,
38 CODEC_ID_RV20,
39 CODEC_ID_MJPEG,
40 CODEC_ID_MJPEGB,
41 CODEC_ID_LJPEG,
42 CODEC_ID_SP5X,
43 CODEC_ID_JPEGLS,
44 CODEC_ID_MPEG4,
45 CODEC_ID_RAWVIDEO,
46 CODEC_ID_MSMPEG4V1,
47 CODEC_ID_MSMPEG4V2,
48 CODEC_ID_MSMPEG4V3,
49 CODEC_ID_WMV1,
50 CODEC_ID_WMV2,
51 CODEC_ID_H263P,
52 CODEC_ID_H263I,
53 CODEC_ID_FLV1,
54 CODEC_ID_SVQ1,
55 CODEC_ID_SVQ3,
56 CODEC_ID_DVVIDEO,
57 CODEC_ID_HUFFYUV,
58 CODEC_ID_CYUV,
59 CODEC_ID_H264,
60 CODEC_ID_INDEO3,
61 CODEC_ID_VP3,
62 CODEC_ID_THEORA,
63 CODEC_ID_ASV1,
64 CODEC_ID_ASV2,
65 CODEC_ID_FFV1,
66 CODEC_ID_4XM,
67 CODEC_ID_VCR1,
68 CODEC_ID_CLJR,
69 CODEC_ID_MDEC,
70 CODEC_ID_ROQ,
71 CODEC_ID_INTERPLAY_VIDEO,
72 CODEC_ID_XAN_WC3,
73 CODEC_ID_XAN_WC4,
74 CODEC_ID_RPZA,
75 CODEC_ID_CINEPAK,
76 CODEC_ID_WS_VQA,
77 CODEC_ID_MSRLE,
78 CODEC_ID_MSVIDEO1,
79 CODEC_ID_IDCIN,
80 CODEC_ID_8BPS,
81 CODEC_ID_SMC,
82 CODEC_ID_FLIC,
83 CODEC_ID_TRUEMOTION1,
84 CODEC_ID_VMDVIDEO,
85 CODEC_ID_MSZH,
86 CODEC_ID_ZLIB,
87 CODEC_ID_QTRLE,
88 CODEC_ID_SNOW,
89 CODEC_ID_TSCC,
90 CODEC_ID_ULTI,
91 CODEC_ID_QDRAW,
92 CODEC_ID_VIXL,
93 CODEC_ID_QPEG,
94 CODEC_ID_XVID,
95 CODEC_ID_PNG,
96 CODEC_ID_PPM,
97 CODEC_ID_PBM,
98 CODEC_ID_PGM,
99 CODEC_ID_PGMYUV,
100 CODEC_ID_PAM,
101 CODEC_ID_FFVHUFF,
102 CODEC_ID_RV30,
103 CODEC_ID_RV40,
104 CODEC_ID_VC1,
105 CODEC_ID_WMV3,
106 CODEC_ID_LOCO,
107 CODEC_ID_WNV1,
108 CODEC_ID_AASC,
109 CODEC_ID_INDEO2,
110 CODEC_ID_FRAPS,
111 CODEC_ID_TRUEMOTION2,
112 CODEC_ID_BMP,
113 CODEC_ID_CSCD,
114 CODEC_ID_MMVIDEO,
115 CODEC_ID_ZMBV,
116 CODEC_ID_AVS,
117 CODEC_ID_SMACKVIDEO,
118 CODEC_ID_NUV,
119 CODEC_ID_KMVC,
120 CODEC_ID_FLASHSV,
121 CODEC_ID_CAVS,
122
123 /* various pcm "codecs" */
124 CODEC_ID_PCM_S16LE= 0x10000,
125 CODEC_ID_PCM_S16BE,
126 CODEC_ID_PCM_U16LE,
127 CODEC_ID_PCM_U16BE,
128 CODEC_ID_PCM_S8,
129 CODEC_ID_PCM_U8,
130 CODEC_ID_PCM_MULAW,
131 CODEC_ID_PCM_ALAW,
132 CODEC_ID_PCM_S32LE,
133 CODEC_ID_PCM_S32BE,
134 CODEC_ID_PCM_U32LE,
135 CODEC_ID_PCM_U32BE,
136 CODEC_ID_PCM_S24LE,
137 CODEC_ID_PCM_S24BE,
138 CODEC_ID_PCM_U24LE,
139 CODEC_ID_PCM_U24BE,
140 CODEC_ID_PCM_S24DAUD,
141
142 /* various adpcm codecs */
143 CODEC_ID_ADPCM_IMA_QT= 0x11000,
144 CODEC_ID_ADPCM_IMA_WAV,
145 CODEC_ID_ADPCM_IMA_DK3,
146 CODEC_ID_ADPCM_IMA_DK4,
147 CODEC_ID_ADPCM_IMA_WS,
148 CODEC_ID_ADPCM_IMA_SMJPEG,
149 CODEC_ID_ADPCM_MS,
150 CODEC_ID_ADPCM_4XM,
151 CODEC_ID_ADPCM_XA,
152 CODEC_ID_ADPCM_ADX,
153 CODEC_ID_ADPCM_EA,
154 CODEC_ID_ADPCM_G726,
155 CODEC_ID_ADPCM_CT,
156 CODEC_ID_ADPCM_SWF,
157 CODEC_ID_ADPCM_YAMAHA,
158 CODEC_ID_ADPCM_SBPRO_4,
159 CODEC_ID_ADPCM_SBPRO_3,
160 CODEC_ID_ADPCM_SBPRO_2,
161
162 /* AMR */
163 CODEC_ID_AMR_NB= 0x12000,
164 CODEC_ID_AMR_WB,
165
166 /* RealAudio codecs*/
167 CODEC_ID_RA_144= 0x13000,
168 CODEC_ID_RA_288,
169
170 /* various DPCM codecs */
171 CODEC_ID_ROQ_DPCM= 0x14000,
172 CODEC_ID_INTERPLAY_DPCM,
173 CODEC_ID_XAN_DPCM,
174 CODEC_ID_SOL_DPCM,
175
176 CODEC_ID_MP2= 0x15000,
177 CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
178 CODEC_ID_AAC,
179 CODEC_ID_MPEG4AAC,
180 CODEC_ID_AC3,
181 CODEC_ID_DTS,
182 CODEC_ID_VORBIS,
183 CODEC_ID_DVAUDIO,
184 CODEC_ID_WMAV1,
185 CODEC_ID_WMAV2,
186 CODEC_ID_MACE3,
187 CODEC_ID_MACE6,
188 CODEC_ID_VMDAUDIO,
189 CODEC_ID_SONIC,
190 CODEC_ID_SONIC_LS,
191 CODEC_ID_FLAC,
192 CODEC_ID_MP3ADU,
193 CODEC_ID_MP3ON4,
194 CODEC_ID_SHORTEN,
195 CODEC_ID_ALAC,
196 CODEC_ID_WESTWOOD_SND1,
197 CODEC_ID_GSM,
198 CODEC_ID_QDM2,
199 CODEC_ID_COOK,
200 CODEC_ID_TRUESPEECH,
201 CODEC_ID_TTA,
202 CODEC_ID_SMACKAUDIO,
203 CODEC_ID_QCELP,
204
205 /* subtitle codecs */
206 CODEC_ID_DVD_SUBTITLE= 0x17000,
207 CODEC_ID_DVB_SUBTITLE,
208
209 CODEC_ID_MPEG2TS= 0x20000, /* _FAKE_ codec to indicate a raw MPEG2 transport
210 stream (only used by libavformat) */
211 };
212
213 /* CODEC_ID_MP3LAME is absolete */
214 #define CODEC_ID_MP3LAME CODEC_ID_MP3
215
216 enum CodecType {
217 CODEC_TYPE_UNKNOWN = -1,
218 CODEC_TYPE_VIDEO,
219 CODEC_TYPE_AUDIO,
220 CODEC_TYPE_DATA,
221 CODEC_TYPE_SUBTITLE,
222 };
223
224 /* currently unused, may be used if 24/32 bits samples ever supported */
225 /* all in native endian */
226 enum SampleFormat {
227 SAMPLE_FMT_NONE = -1,
228 SAMPLE_FMT_U8, ///< unsigned 8 bits
229 SAMPLE_FMT_S16, ///< signed 16 bits
230 SAMPLE_FMT_S24, ///< signed 24 bits
231 SAMPLE_FMT_S32, ///< signed 32 bits
232 SAMPLE_FMT_FLT, ///< float
233 };
234
235 /* in bytes */
236 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
237
238 /**
239 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
240 * this is mainly needed because some optimized bitstream readers read
241 * 32 or 64 bit at once and could read over the end<br>
242 * Note, if the first 23 bits of the additional bytes are not 0 then damaged
243 * MPEG bitstreams could cause overread and segfault
244 */
245 #define FF_INPUT_BUFFER_PADDING_SIZE 8
246
247 /**
248 * minimum encoding buffer size.
249 * used to avoid some checks during header writing
250 */
251 #define FF_MIN_BUFFER_SIZE 16384
252
253 /* motion estimation type, EPZS by default */
254 enum Motion_Est_ID {
255 ME_ZERO = 1,
256 ME_FULL,
257 ME_LOG,
258 ME_PHODS,
259 ME_EPZS,
260 ME_X1,
261 ME_HEX,
262 ME_UMH,
263 ME_ITER,
264 };
265
266 enum AVDiscard{
267 //we leave some space between them for extensions (drop some keyframes for intra only or drop just some bidir frames)
268 AVDISCARD_NONE =-16, ///< discard nothing
269 AVDISCARD_DEFAULT= 0, ///< discard useless packets like 0 size packets in avi
270 AVDISCARD_NONREF = 8, ///< discard all non reference
271 AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
272 AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
273 AVDISCARD_ALL = 48, ///< discard all
274 };
275
276 typedef struct RcOverride{
277 int start_frame;
278 int end_frame;
279 int qscale; // if this is 0 then quality_factor will be used instead
280 float quality_factor;
281 } RcOverride;
282
283 #define FF_MAX_B_FRAMES 16
284
285 /* encoding support
286 these flags can be passed in AVCodecContext.flags before initing
287 Note: not everything is supported yet.
288 */
289
290 #define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
291 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / Advanced prediction for H263
292 #define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
293 #define CODEC_FLAG_GMC 0x0020 ///< use GMC
294 #define CODEC_FLAG_MV0 0x0040 ///< always try a MB with MV=<0,0>
295 #define CODEC_FLAG_PART 0x0080 ///< use data partitioning
296 /* parent program gurantees that the input for b-frame containing streams is not written to
297 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
298 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
299 #define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
300 #define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
301 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
302 #define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
303 #define CODEC_FLAG_EMU_EDGE 0x4000///< don't draw edges
304 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
305 #define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
306 of only at frame boundaries */
307 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
308 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
309 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay
310 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
311 #define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
312 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
313 #define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
314 /* Fx : Flag for h263+ extra options */
315 #define CODEC_FLAG_H263P_AIC 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
316 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
317 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
318 #define CODEC_FLAG_CBP_RD 0x04000000 ///< use rate distortion optimization for cbp
319 #define CODEC_FLAG_QP_RD 0x08000000 ///< use rate distortion optimization for qp selectioon
320 #define CODEC_FLAG_H263P_AIV 0x00000008 ///< H263 Alternative inter vlc
321 #define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
322 #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
323 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
324 #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
325 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
326 #define CODEC_FLAG_CLOSED_GOP ((int)0x80000000)
327 #define CODEC_FLAG2_FAST 0x00000001 ///< allow non spec compliant speedup tricks
328 #define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< strictly enforce GOP size
329 #define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< skip bitstream encoding
330 #define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< place global headers at every keyframe instead of in extradata
331 #define CODEC_FLAG2_BPYRAMID 0x00000010 ///< H.264 allow b-frames to be used as references
332 #define CODEC_FLAG2_WPRED 0x00000020 ///< H.264 weighted biprediction for b-frames
333 #define CODEC_FLAG2_MIXED_REFS 0x00000040 ///< H.264 multiple references per partition
334 #define CODEC_FLAG2_8X8DCT 0x00000080 ///< H.264 high profile 8x8 transform
335 #define CODEC_FLAG2_FASTPSKIP 0x00000100 ///< H.264 fast pskip
336 #define CODEC_FLAG2_AUD 0x00000200 ///< H.264 access unit delimiters
337 #define CODEC_FLAG2_BRDO 0x00000400 ///< b-frame rate-distortion optimization
338 #define CODEC_FLAG2_INTRA_VLC 0x00000800 ///< use MPEG-2 intra VLC table
339 #define CODEC_FLAG2_MEMC_ONLY 0x00001000 ///< only do ME/MC (I frames -> ref, P frame -> ME+MC)
340
341 /* Unsupported options :
342 * Syntax Arithmetic coding (SAC)
343 * Reference Picture Selection
344 * Independant Segment Decoding */
345 /* /Fx */
346 /* codec capabilities */
347
348 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
349 /**
350 * Codec uses get_buffer() for allocating buffers.
351 * direct rendering method 1
352 */
353 #define CODEC_CAP_DR1 0x0002
354 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
355 used */
356 #define CODEC_CAP_PARSE_ONLY 0x0004
357 #define CODEC_CAP_TRUNCATED 0x0008
358 /* codec can export data for HW decoding (XvMC) */
359 #define CODEC_CAP_HWACCEL 0x0010
360 /**
361 * codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data.
362 * if this is not set, the codec is guranteed to never be feeded with NULL data
363 */
364 #define CODEC_CAP_DELAY 0x0020
365 /**
366 * Codec can be fed a final frame with a smaller size.
367 * This can be used to prevent truncation of the last audio samples.
368 */
369 #define CODEC_CAP_SMALL_LAST_FRAME 0x0040
370
371 //the following defines may change, don't expect compatibility if you use them
372 #define MB_TYPE_INTRA4x4 0x0001
373 #define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
374 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME h264 specific
375 #define MB_TYPE_16x16 0x0008
376 #define MB_TYPE_16x8 0x0010
377 #define MB_TYPE_8x16 0x0020
378 #define MB_TYPE_8x8 0x0040
379 #define MB_TYPE_INTERLACED 0x0080
380 #define MB_TYPE_DIRECT2 0x0100 //FIXME
381 #define MB_TYPE_ACPRED 0x0200
382 #define MB_TYPE_GMC 0x0400
383 #define MB_TYPE_SKIP 0x0800
384 #define MB_TYPE_P0L0 0x1000
385 #define MB_TYPE_P1L0 0x2000
386 #define MB_TYPE_P0L1 0x4000
387 #define MB_TYPE_P1L1 0x8000
388 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
389 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
390 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
391 #define MB_TYPE_QUANT 0x00010000
392 #define MB_TYPE_CBP 0x00020000
393 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
394
395 /**
396 * Pan Scan area.
397 * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
398 */
399 typedef struct AVPanScan{
400 /**
401 * id.
402 * - encoding: set by user.
403 * - decoding: set by lavc
404 */
405 int id;
406
407 /**
408 * width and height in 1/16 pel
409 * - encoding: set by user.
410 * - decoding: set by lavc
411 */
412 int width;
413 int height;
414
415 /**
416 * position of the top left corner in 1/16 pel for up to 3 fields/frames.
417 * - encoding: set by user.
418 * - decoding: set by lavc
419 */
420 int16_t position[3][2];
421 }AVPanScan;
422
423 #define FF_COMMON_FRAME \
424 /**\
425 * pointer to the picture planes.\
426 * this might be different from the first allocated byte\
427 * - encoding: \
428 * - decoding: \
429 */\
430 uint8_t *data[4];\
431 int linesize[4];\
432 /**\
433 * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
434 * this isn't used by lavc unless the default get/release_buffer() is used\
435 * - encoding: \
436 * - decoding: \
437 */\
438 uint8_t *base[4];\
439 /**\
440 * 1 -> keyframe, 0-> not\
441 * - encoding: set by lavc\
442 * - decoding: set by lavc\
443 */\
444 int key_frame;\
445 \
446 /**\
447 * picture type of the frame, see ?_TYPE below.\
448 * - encoding: set by lavc for coded_picture (and set by user for input)\
449 * - decoding: set by lavc\
450 */\
451 int pict_type;\
452 \
453 /**\
454 * presentation timestamp in time_base units (time when frame should be shown to user)\
455 * if AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed\
456 * - encoding: MUST be set by user\
457 * - decoding: set by lavc\
458 */\
459 int64_t pts;\
460 \
461 /**\
462 * picture number in bitstream order.\
463 * - encoding: set by\
464 * - decoding: set by lavc\
465 */\
466 int coded_picture_number;\
467 /**\
468 * picture number in display order.\
469 * - encoding: set by\
470 * - decoding: set by lavc\
471 */\
472 int display_picture_number;\
473 \
474 /**\
475 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
476 * - encoding: set by lavc for coded_picture (and set by user for input)\
477 * - decoding: set by lavc\
478 */\
479 int quality; \
480 \
481 /**\
482 * buffer age (1->was last buffer and dint change, 2->..., ...).\
483 * set to INT_MAX if the buffer has not been used yet \
484 * - encoding: unused\
485 * - decoding: MUST be set by get_buffer()\
486 */\
487 int age;\
488 \
489 /**\
490 * is this picture used as reference\
491 * - encoding: unused\
492 * - decoding: set by lavc (before get_buffer() call))\
493 */\
494 int reference;\
495 \
496 /**\
497 * QP table\
498 * - encoding: unused\
499 * - decoding: set by lavc\
500 */\
501 int8_t *qscale_table;\
502 /**\
503 * QP store stride\
504 * - encoding: unused\
505 * - decoding: set by lavc\
506 */\
507 int qstride;\
508 \
509 /**\
510 * mbskip_table[mb]>=1 if MB didnt change\
511 * stride= mb_width = (width+15)>>4\
512 * - encoding: unused\
513 * - decoding: set by lavc\
514 */\
515 uint8_t *mbskip_table;\
516 \
517 /**\
518 * Motion vector table.\
519 * @code\
520 * example:\
521 * int mv_sample_log2= 4 - motion_subsample_log2;\
522 * int mb_width= (width+15)>>4;\
523 * int mv_stride= (mb_width << mv_sample_log2) + 1;\
524 * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
525 * @endcode\
526 * - encoding: set by user\
527 * - decoding: set by lavc\
528 */\
529 int16_t (*motion_val[2])[2];\
530 \
531 /**\
532 * Macroblock type table\
533 * mb_type_base + mb_width + 2\
534 * - encoding: set by user\
535 * - decoding: set by lavc\
536 */\
537 uint32_t *mb_type;\
538 \
539 /**\
540 * log2 of the size of the block which a single vector in motion_val represents: \
541 * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
542 * - encoding: unused\
543 * - decoding: set by lavc\
544 */\
545 uint8_t motion_subsample_log2;\
546 \
547 /**\
548 * for some private data of the user\
549 * - encoding: unused\
550 * - decoding: set by user\
551 */\
552 void *opaque;\
553 \
554 /**\
555 * error\
556 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
557 * - decoding: unused\
558 */\
559 uint64_t error[4];\
560 \
561 /**\
562 * type of the buffer (to keep track of who has to dealloc data[*])\
563 * - encoding: set by the one who allocs it\
564 * - decoding: set by the one who allocs it\
565 * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
566 */\
567 int type;\
568 \
569 /**\
570 * when decoding, this signal how much the picture must be delayed.\
571 * extra_delay = repeat_pict / (2*fps)\
572 * - encoding: unused\
573 * - decoding: set by lavc\
574 */\
575 int repeat_pict;\
576 \
577 /**\
578 * \
579 */\
580 int qscale_type;\
581 \
582 /**\
583 * The content of the picture is interlaced.\
584 * - encoding: set by user\
585 * - decoding: set by lavc (default 0)\
586 */\
587 int interlaced_frame;\
588 \
589 /**\
590 * if the content is interlaced, is top field displayed first.\
591 * - encoding: set by user\
592 * - decoding: set by lavc\
593 */\
594 int top_field_first;\
595 \
596 /**\
597 * Pan scan.\
598 * - encoding: set by user\
599 * - decoding: set by lavc\
600 */\
601 AVPanScan *pan_scan;\
602 \
603 /**\
604 * tell user application that palette has changed from previous frame.\
605 * - encoding: ??? (no palette-enabled encoder yet)\
606 * - decoding: set by lavc (default 0)\
607 */\
608 int palette_has_changed;\
609 \
610 /**\
611 * Codec suggestion on buffer type if != 0\
612 * - encoding: unused\
613 * - decoding: set by lavc (before get_buffer() call))\
614 */\
615 int buffer_hints;\
616 \
617 /**\
618 * DCT coeffitients\
619 * - encoding: unused\
620 * - decoding: set by lavc\
621 */\
622 short *dct_coeff;\
623 \
624 /**\
625 * Motion referece frame index\
626 * - encoding: set by user\
627 * - decoding: set by lavc\
628 */\
629 int8_t *ref_index[2];
630
631 #define FF_QSCALE_TYPE_MPEG1 0
632 #define FF_QSCALE_TYPE_MPEG2 1
633 #define FF_QSCALE_TYPE_H264 2
634
635 #define FF_BUFFER_TYPE_INTERNAL 1
636 #define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
637 #define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewhere else, don't dealloc image (data/base), all other tables are not shared
638 #define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, don't dealloc anything
639
640
641 #define FF_I_TYPE 1 // Intra
642 #define FF_P_TYPE 2 // Predicted
643 #define FF_B_TYPE 3 // Bi-dir predicted
644 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
645 #define FF_SI_TYPE 5
646 #define FF_SP_TYPE 6
647
648 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore)
649 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
650 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
651 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
652
653 /**
654 * Audio Video Frame.
655 */
656 typedef struct AVFrame {
657 FF_COMMON_FRAME
658 } AVFrame;
659
660 #define DEFAULT_FRAME_RATE_BASE 1001000
661
662 /**
663 * main external api structure.
664 */
665 typedef struct AVCodecContext {
666 /**
667 * Info on struct for av_log
668 * - set by avcodec_alloc_context
669 */
670 AVClass *av_class;
671 /**
672 * the average bitrate.
673 * - encoding: set by user. unused for constant quantizer encoding
674 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
675 */
676 int bit_rate;
677
678 /**
679 * number of bits the bitstream is allowed to diverge from the reference.
680 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
681 * - encoding: set by user. unused for constant quantizer encoding
682 * - decoding: unused
683 */
684 int bit_rate_tolerance;
685
686 /**
687 * CODEC_FLAG_*.
688 * - encoding: set by user.
689 * - decoding: set by user.
690 */
691 int flags;
692
693 /**
694 * some codecs needs additionnal format info. It is stored here
695 * - encoding: set by user.
696 * - decoding: set by lavc. (FIXME is this ok?)
697 */
698 int sub_id;
699
700 /**
701 * motion estimation algorithm used for video coding.
702 * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
703 * 8 (umh), 9 (iter) [7, 8 are x264 specific, 9 is snow specific]
704 * - encoding: MUST be set by user.
705 * - decoding: unused
706 */
707 int me_method;
708
709 /**
710 * some codecs need / can use extra-data like huffman tables.
711 * mjpeg: huffman tables
712 * rv10: additional flags
713 * mpeg4: global headers (they can be in the bitstream or here)
714 * the allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
715 * then extradata_size to avoid prolems if its read with the bitstream reader
716 * the bytewise contents of extradata must not depend on the architecture or cpu endianness
717 * - encoding: set/allocated/freed by lavc.
718 * - decoding: set/allocated/freed by user.
719 */
720 void *extradata;
721 int extradata_size;
722
723 /**
724 * this is the fundamental unit of time (in seconds) in terms
725 * of which frame timestamps are represented. for fixed-fps content,
726 * timebase should be 1/framerate and timestamp increments should be
727 * identically 1.
728 * - encoding: MUST be set by user
729 * - decoding: set by lavc.
730 */
731 AVRational time_base;
732
733 /* video only */
734 /**
735 * picture width / height.
736 * - encoding: MUST be set by user.
737 * - decoding: set by lavc.
738 * Note, for compatibility its possible to set this instead of
739 * coded_width/height before decoding
740 */
741 int width, height;
742
743 #define FF_ASPECT_EXTENDED 15
744
745 /**
746 * the number of pictures in a group of pitures, or 0 for intra_only.
747 * - encoding: set by user.
748 * - decoding: unused
749 */
750 int gop_size;
751
752 /**
753 * pixel format, see PIX_FMT_xxx.
754 * - encoding: set by user.
755 * - decoding: set by lavc.
756 */
757 enum PixelFormat pix_fmt;
758
759 /**
760 * Frame rate emulation. If not zero lower layer (i.e. format handler)
761 * has to read frames at native frame rate.
762 * - encoding: set by user.
763 * - decoding: unused.
764 */
765 int rate_emu;
766
767 /**
768 * if non NULL, 'draw_horiz_band' is called by the libavcodec
769 * decoder to draw an horizontal band. It improve cache usage. Not
770 * all codecs can do that. You must check the codec capabilities
771 * before
772 * - encoding: unused
773 * - decoding: set by user.
774 * @param height the height of the slice
775 * @param y the y position of the slice
776 * @param type 1->top field, 2->bottom field, 3->frame
777 * @param offset offset into the AVFrame.data from which the slice should be read
778 */
779 void (*draw_horiz_band)(struct AVCodecContext *s,
780 const AVFrame *src, int offset[4],
781 int y, int type, int height);
782
783 /* audio only */
784 int sample_rate; ///< samples per sec
785 int channels;
786
787 /**
788 * audio sample format.
789 * - encoding: set by user.
790 * - decoding: set by lavc.
791 */
792 enum SampleFormat sample_fmt; ///< sample format, currenly unused
793
794 /* the following data should not be initialized */
795 /**
796 * samples per packet. initialized when calling 'init'
797 */
798 int frame_size;
799 int frame_number; ///< audio or video frame number
800 int real_pict_num; ///< returns the real picture number of previous encoded frame
801
802 /**
803 * number of frames the decoded output will be delayed relative to
804 * the encoded input.
805 * - encoding: set by lavc.
806 * - decoding: unused
807 */
808 int delay;
809
810 /* - encoding parameters */
811 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
812 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
813
814 /**
815 * minimum quantizer.
816 * - encoding: set by user.
817 * - decoding: unused
818 */
819 int qmin;
820
821 /**
822 * maximum quantizer.
823 * - encoding: set by user.
824 * - decoding: unused
825 */
826 int qmax;
827
828 /**
829 * maximum quantizer difference etween frames.
830 * - encoding: set by user.
831 * - decoding: unused
832 */
833 int max_qdiff;
834
835 /**
836 * maximum number of b frames between non b frames.
837 * note: the output will be delayed by max_b_frames+1 relative to the input
838 * - encoding: set by user.
839 * - decoding: unused
840 */
841 int max_b_frames;
842
843 /**
844 * qscale factor between ip and b frames.
845 * - encoding: set by user.
846 * - decoding: unused
847 */
848 float b_quant_factor;
849
850 /** obsolete FIXME remove */
851 int rc_strategy;
852 #define FF_RC_STRATEGY_XVID 1
853
854 int b_frame_strategy;
855
856 /**
857 * hurry up amount.
858 * deprecated in favor of skip_idct and skip_frame
859 * - encoding: unused
860 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
861 */
862 int hurry_up;
863
864 struct AVCodec *codec;
865
866 void *priv_data;
867
868 /* unused, FIXME remove*/
869 int rtp_mode;
870
871 int rtp_payload_size; /* The size of the RTP payload: the coder will */
872 /* do it's best to deliver a chunk with size */
873 /* below rtp_payload_size, the chunk will start */
874 /* with a start code on some codecs like H.263 */
875 /* This doesn't take account of any particular */
876 /* headers inside the transmited RTP payload */
877
878
879 /* The RTP callback: This function is called */
880 /* every time the encoder has a packet to send */
881 /* Depends on the encoder if the data starts */
882 /* with a Start Code (it should) H.263 does. */
883 /* mb_nb contains the number of macroblocks */
884 /* encoded in the RTP payload */
885 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
886
887 /* statistics, used for 2-pass encoding */
888 int mv_bits;
889 int header_bits;
890 int i_tex_bits;
891 int p_tex_bits;
892 int i_count;
893 int p_count;
894 int skip_count;
895 int misc_bits;
896
897 /**
898 * number of bits used for the previously encoded frame.
899 * - encoding: set by lavc
900 * - decoding: unused
901 */
902 int frame_bits;
903
904 /**
905 * private data of the user, can be used to carry app specific stuff.
906 * - encoding: set by user
907 * - decoding: set by user
908 */
909 void *opaque;
910
911 char codec_name[32];
912 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
913 enum CodecID codec_id; /* see CODEC_ID_xxx */
914
915 /**
916 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
917 * this is used to workaround some encoder bugs
918 * - encoding: set by user, if not then the default based on codec_id will be used
919 * - decoding: set by user, will be converted to upper case by lavc during init
920 */
921 unsigned int codec_tag;
922
923 /**
924 * workaround bugs in encoders which sometimes cannot be detected automatically.
925 * - encoding: set by user
926 * - decoding: set by user
927 */
928 int workaround_bugs;
929 #define FF_BUG_AUTODETECT 1 ///< autodetection
930 #define FF_BUG_OLD_MSMPEG4 2
931 #define FF_BUG_XVID_ILACE 4
932 #define FF_BUG_UMP4 8
933 #define FF_BUG_NO_PADDING 16
934 #define FF_BUG_AMV 32
935 #define FF_BUG_AC_VLC 0 ///< will be removed, libavcodec can now handle these non compliant files by default
936 #define FF_BUG_QPEL_CHROMA 64
937 #define FF_BUG_STD_QPEL 128
938 #define FF_BUG_QPEL_CHROMA2 256
939 #define FF_BUG_DIRECT_BLOCKSIZE 512
940 #define FF_BUG_EDGE 1024
941 #define FF_BUG_HPEL_CHROMA 2048
942 #define FF_BUG_DC_CLIP 4096
943 #define FF_BUG_MS 8192 ///< workaround various bugs in microsofts broken decoders
944 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
945
946 /**
947 * luma single coeff elimination threshold.
948 * - encoding: set by user
949 * - decoding: unused
950 */
951 int luma_elim_threshold;
952
953 /**
954 * chroma single coeff elimination threshold.
955 * - encoding: set by user
956 * - decoding: unused
957 */
958 int chroma_elim_threshold;
959
960 /**
961 * strictly follow the std (MPEG4, ...).
962 * - encoding: set by user
963 * - decoding: unused
964 */
965 int strict_std_compliance;
966 #define FF_COMPLIANCE_VERY_STRICT 2 ///< strictly conform to a older more strict version of the spec or reference software
967 #define FF_COMPLIANCE_STRICT 1 ///< strictly conform to all the things in the spec no matter what consequences
968 #define FF_COMPLIANCE_NORMAL 0
969 #define FF_COMPLIANCE_INOFFICIAL -1 ///< allow inofficial extensions
970 #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< allow non standarized experimental things
971
972 /**
973 * qscale offset between ip and b frames.
974 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
975 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
976 * - encoding: set by user.
977 * - decoding: unused
978 */
979 float b_quant_offset;
980
981 /**
982 * error resilience higher values will detect more errors but may missdetect
983 * some more or less valid parts as errors.
984 * - encoding: unused
985 * - decoding: set by user
986 */
987 int error_resilience;
988 #define FF_ER_CAREFUL 1
989 #define FF_ER_COMPLIANT 2
990 #define FF_ER_AGGRESSIVE 3
991 #define FF_ER_VERY_AGGRESSIVE 4
992
993 /**
994 * called at the beginning of each frame to get a buffer for it.
995 * if pic.reference is set then the frame will be read later by lavc
996 * avcodec_align_dimensions() should be used to find the required width and
997 * height, as they normally need to be rounded up to the next multiple of 16
998 * - encoding: unused
999 * - decoding: set by lavc, user can override
1000 */
1001 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1002
1003 /**
1004 * called to release buffers which where allocated with get_buffer.
1005 * a released buffer can be reused in get_buffer()
1006 * pic.data[*] must be set to NULL
1007 * - encoding: unused
1008 * - decoding: set by lavc, user can override
1009 */
1010 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1011
1012 /**
1013 * if 1 the stream has a 1 frame delay during decoding.
1014 * - encoding: set by lavc
1015 * - decoding: set by lavc
1016 */
1017 int has_b_frames;
1018
1019 /**
1020 * number of bytes per packet if constant and known or 0
1021 * used by some WAV based audio codecs
1022 */
1023 int block_align;
1024
1025 int parse_only; /* - decoding only: if true, only parsing is done
1026 (function avcodec_parse_frame()). The frame
1027 data is returned. Only MPEG codecs support this now. */
1028
1029 /**
1030 * 0-> h263 quant 1-> mpeg quant.
1031 * - encoding: set by user.
1032 * - decoding: unused
1033 */
1034 int mpeg_quant;
1035
1036 /**
1037 * pass1 encoding statistics output buffer.
1038 * - encoding: set by lavc
1039 * - decoding: unused
1040 */
1041 char *stats_out;
1042
1043 /**
1044 * pass2 encoding statistics input buffer.
1045 * concatenated stuff from stats_out of pass1 should be placed here
1046 * - encoding: allocated/set/freed by user
1047 * - decoding: unused
1048 */
1049 char *stats_in;
1050
1051 /**
1052 * ratecontrol qmin qmax limiting method.
1053 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
1054 * - encoding: set by user.
1055 * - decoding: unused
1056 */
1057 float rc_qsquish;
1058
1059 float rc_qmod_amp;
1060 int rc_qmod_freq;
1061
1062 /**
1063 * ratecontrol override, see RcOverride.
1064 * - encoding: allocated/set/freed by user.
1065 * - decoding: unused
1066 */
1067 RcOverride *rc_override;
1068 int rc_override_count;
1069
1070 /**
1071 * rate control equation.
1072 * - encoding: set by user
1073 * - decoding: unused
1074 */
1075 char *rc_eq;
1076
1077 /**
1078 * maximum bitrate.
1079 * - encoding: set by user.
1080 * - decoding: unused
1081 */
1082 int rc_max_rate;
1083
1084 /**
1085 * minimum bitrate.
1086 * - encoding: set by user.
1087 * - decoding: unused
1088 */
1089 int rc_min_rate;
1090
1091 /**
1092 * decoder bitstream buffer size.
1093 * - encoding: set by user.
1094 * - decoding: unused
1095 */
1096 int rc_buffer_size;
1097 float rc_buffer_aggressivity;
1098
1099 /**
1100 * qscale factor between p and i frames.
1101 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1102 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1103 * - encoding: set by user.
1104 * - decoding: unused
1105 */
1106 float i_quant_factor;
1107
1108 /**
1109 * qscale offset between p and i frames.
1110 * - encoding: set by user.
1111 * - decoding: unused
1112 */
1113 float i_quant_offset;
1114
1115 /**
1116 * initial complexity for pass1 ratecontrol.
1117 * - encoding: set by user.
1118 * - decoding: unused
1119 */
1120 float rc_initial_cplx;
1121
1122 /**
1123 * dct algorithm, see FF_DCT_* below.
1124 * - encoding: set by user
1125 * - decoding: unused
1126 */
1127 int dct_algo;
1128 #define FF_DCT_AUTO 0
1129 #define FF_DCT_FASTINT 1
1130 #define FF_DCT_INT 2
1131 #define FF_DCT_MMX 3
1132 #define FF_DCT_MLIB 4
1133 #define FF_DCT_ALTIVEC 5
1134 #define FF_DCT_FAAN 6
1135
1136 /**
1137 * luminance masking (0-> disabled).
1138 * - encoding: set by user
1139 * - decoding: unused
1140 */
1141 float lumi_masking;
1142
1143 /**
1144 * temporary complexity masking (0-> disabled).
1145 * - encoding: set by user
1146 * - decoding: unused
1147 */
1148 float temporal_cplx_masking;
1149
1150 /**
1151 * spatial complexity masking (0-> disabled).
1152 * - encoding: set by user
1153 * - decoding: unused
1154 */
1155 float spatial_cplx_masking;
1156
1157 /**
1158 * p block masking (0-> disabled).
1159 * - encoding: set by user
1160 * - decoding: unused
1161 */
1162 float p_masking;
1163
1164 /**
1165 * darkness masking (0-> disabled).
1166 * - encoding: set by user
1167 * - decoding: unused
1168 */
1169 float dark_masking;
1170
1171
1172 /* for binary compatibility */
1173 int unused;
1174
1175 /**
1176 * idct algorithm, see FF_IDCT_* below.
1177 * - encoding: set by user
1178 * - decoding: set by user
1179 */
1180 int idct_algo;
1181 #define FF_IDCT_AUTO 0
1182 #define FF_IDCT_INT 1
1183 #define FF_IDCT_SIMPLE 2
1184 #define FF_IDCT_SIMPLEMMX 3
1185 #define FF_IDCT_LIBMPEG2MMX 4
1186 #define FF_IDCT_PS2 5
1187 #define FF_IDCT_MLIB 6
1188 #define FF_IDCT_ARM 7
1189 #define FF_IDCT_ALTIVEC 8
1190 #define FF_IDCT_SH4 9
1191 #define FF_IDCT_SIMPLEARM 10
1192 #define FF_IDCT_H264 11
1193 #define FF_IDCT_VP3 12
1194 #define FF_IDCT_IPP 13
1195 #define FF_IDCT_XVIDMMX 14
1196 #define FF_IDCT_CAVS 15
1197
1198 /**
1199 * slice count.
1200 * - encoding: set by lavc
1201 * - decoding: set by user (or 0)
1202 */
1203 int slice_count;
1204 /**
1205 * slice offsets in the frame in bytes.
1206 * - encoding: set/allocated by lavc
1207 * - decoding: set/allocated by user (or NULL)
1208 */
1209 int *slice_offset;
1210
1211 /**
1212 * error concealment flags.
1213 * - encoding: unused
1214 * - decoding: set by user
1215 */
1216 int error_concealment;
1217 #define FF_EC_GUESS_MVS 1
1218 #define FF_EC_DEBLOCK 2
1219
1220 /**
1221 * dsp_mask could be add used to disable unwanted CPU features
1222 * CPU features (i.e. MMX, SSE. ...)
1223 *
1224 * with FORCE flag you may instead enable given CPU features
1225 * (Dangerous: usable in case of misdetection, improper usage however will
1226 * result into program crash)
1227 */
1228 unsigned dsp_mask;
1229 #define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
1230 /* lower 16 bits - CPU features */
1231 #ifdef HAVE_MMX
1232 #define FF_MM_MMX 0x0001 /* standard MMX */
1233 #define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
1234 #define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
1235 #define FF_MM_SSE 0x0008 /* SSE functions */
1236 #define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
1237 #define FF_MM_3DNOWEXT 0x0020 /* AMD 3DNowExt */
1238 #endif /* HAVE_MMX */
1239 #ifdef HAVE_IWMMXT
1240 #define FF_MM_IWMMXT 0x0100 /* XScale IWMMXT */
1241 #endif /* HAVE_IWMMXT */
1242
1243 /**
1244 * bits per sample/pixel from the demuxer (needed for huffyuv).
1245 * - encoding: set by lavc
1246 * - decoding: set by user
1247 */
1248 int bits_per_sample;
1249
1250 /**
1251 * prediction method (needed for huffyuv).
1252 * - encoding: set by user
1253 * - decoding: unused
1254 */
1255 int prediction_method;
1256 #define FF_PRED_LEFT 0
1257 #define FF_PRED_PLANE 1
1258 #define FF_PRED_MEDIAN 2
1259
1260 /**
1261 * sample aspect ratio (0 if unknown).
1262 * numerator and denominator must be relative prime and smaller then 256 for some video standards
1263 * - encoding: set by user.
1264 * - decoding: set by lavc.
1265 */
1266 AVRational sample_aspect_ratio;
1267
1268 /**
1269 * the picture in the bitstream.
1270 * - encoding: set by lavc
1271 * - decoding: set by lavc
1272 */
1273 AVFrame *coded_frame;
1274
1275 /**
1276 * debug.
1277 * - encoding: set by user.
1278 * - decoding: set by user.
1279 */
1280 int debug;
1281 #define FF_DEBUG_PICT_INFO 1
1282 #define FF_DEBUG_RC 2
1283 #define FF_DEBUG_BITSTREAM 4
1284 #define FF_DEBUG_MB_TYPE 8
1285 #define FF_DEBUG_QP 16
1286 #define FF_DEBUG_MV 32
1287 #define FF_DEBUG_DCT_COEFF 0x00000040
1288 #define FF_DEBUG_SKIP 0x00000080
1289 #define FF_DEBUG_STARTCODE 0x00000100
1290 #define FF_DEBUG_PTS 0x00000200
1291 #define FF_DEBUG_ER 0x00000400
1292 #define FF_DEBUG_MMCO 0x00000800
1293 #define FF_DEBUG_BUGS 0x00001000
1294 #define FF_DEBUG_VIS_QP 0x00002000
1295 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1296
1297 /**
1298 * debug.
1299 * - encoding: set by user.
1300 * - decoding: set by user.
1301 */
1302 int debug_mv;
1303 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1304 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1305 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1306
1307 /**
1308 * error.
1309 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1310 * - decoding: unused
1311 */
1312 uint64_t error[4];
1313
1314 /**
1315 * minimum MB quantizer.
1316 * - encoding: unused
1317 * - decoding: unused
1318 */
1319 int mb_qmin;
1320
1321 /**
1322 * maximum MB quantizer.
1323 * - encoding: unused
1324 * - decoding: unused
1325 */
1326 int mb_qmax;
1327
1328 /**
1329 * motion estimation compare function.
1330 * - encoding: set by user.
1331 * - decoding: unused
1332 */
1333 int me_cmp;
1334 /**
1335 * subpixel motion estimation compare function.
1336 * - encoding: set by user.
1337 * - decoding: unused
1338 */
1339 int me_sub_cmp;
1340 /**
1341 * macroblock compare function (not supported yet).
1342 * - encoding: set by user.
1343 * - decoding: unused
1344 */
1345 int mb_cmp;
1346 /**
1347 * interlaced dct compare function
1348 * - encoding: set by user.
1349 * - decoding: unused
1350 */
1351 int ildct_cmp;
1352 #define FF_CMP_SAD 0
1353 #define FF_CMP_SSE 1
1354 #define FF_CMP_SATD 2
1355 #define FF_CMP_DCT 3
1356 #define FF_CMP_PSNR 4
1357 #define FF_CMP_BIT 5
1358 #define FF_CMP_RD 6
1359 #define FF_CMP_ZERO 7
1360 #define FF_CMP_VSAD 8
1361 #define FF_CMP_VSSE 9
1362 #define FF_CMP_NSSE 10
1363 #define FF_CMP_W53 11
1364 #define FF_CMP_W97 12
1365 #define FF_CMP_DCTMAX 13
1366 #define FF_CMP_DCT264 14
1367 #define FF_CMP_CHROMA 256
1368
1369 /**
1370 * ME diamond size & shape.
1371 * - encoding: set by user.
1372 * - decoding: unused
1373 */
1374 int dia_size;
1375
1376 /**
1377 * amount of previous MV predictors (2a+1 x 2a+1 square).
1378 * - encoding: set by user.
1379 * - decoding: unused
1380 */
1381 int last_predictor_count;
1382
1383 /**
1384 * pre pass for motion estimation.
1385 * - encoding: set by user.
1386 * - decoding: unused
1387 */
1388 int pre_me;
1389
1390 /**
1391 * motion estimation pre pass compare function.
1392 * - encoding: set by user.
1393 * - decoding: unused
1394 */
1395 int me_pre_cmp;
1396
1397 /**
1398 * ME pre pass diamond size & shape.
1399 * - encoding: set by user.
1400 * - decoding: unused
1401 */
1402 int pre_dia_size;
1403
1404 /**
1405 * subpel ME quality.
1406 * - encoding: set by user.
1407 * - decoding: unused
1408 */
1409 int me_subpel_quality;
1410
1411 /**
1412 * callback to negotiate the pixelFormat.
1413 * @param fmt is the list of formats which are supported by the codec,
1414 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1415 * the first is allways the native one
1416 * @return the choosen format
1417 * - encoding: unused
1418 * - decoding: set by user, if not set then the native format will always be choosen
1419 */
1420 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1421
1422 /**
1423 * DTG active format information (additionnal aspect ratio
1424 * information only used in DVB MPEG2 transport streams). 0 if
1425 * not set.
1426 *
1427 * - encoding: unused.
1428 * - decoding: set by decoder
1429 */
1430 int dtg_active_format;
1431 #define FF_DTG_AFD_SAME 8
1432 #define FF_DTG_AFD_4_3 9
1433 #define FF_DTG_AFD_16_9 10
1434 #define FF_DTG_AFD_14_9 11
1435 #define FF_DTG_AFD_4_3_SP_14_9 13
1436 #define FF_DTG_AFD_16_9_SP_14_9 14
1437 #define FF_DTG_AFD_SP_4_3 15
1438
1439 /**
1440 * Maximum motion estimation search range in subpel units.
1441 * if 0 then no limit
1442 *
1443 * - encoding: set by user.
1444 * - decoding: unused.
1445 */
1446 int me_range;
1447
1448 /**
1449 * intra quantizer bias.
1450 * - encoding: set by user.
1451 * - decoding: unused
1452 */
1453 int intra_quant_bias;
1454 #define FF_DEFAULT_QUANT_BIAS 999999
1455
1456 /**
1457 * inter quantizer bias.
1458 * - encoding: set by user.
1459 * - decoding: unused
1460 */
1461 int inter_quant_bias;
1462
1463 /**
1464 * color table ID.
1465 * - encoding: unused.
1466 * - decoding: which clrtable should be used for 8bit RGB images
1467 * table have to be stored somewhere FIXME
1468 */
1469 int color_table_id;
1470
1471 /**
1472 * internal_buffer count.
1473 * Don't touch, used by lavc default_get_buffer()
1474 */
1475 int internal_buffer_count;
1476
1477 /**
1478 * internal_buffers.
1479 * Don't touch, used by lavc default_get_buffer()
1480 */
1481 void *internal_buffer;
1482
1483 #define FF_LAMBDA_SHIFT 7
1484 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1485 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1486 #define FF_LAMBDA_MAX (256*128-1)
1487
1488 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1489 /**
1490 * global quality for codecs which cannot change it per frame.
1491 * this should be proportional to MPEG1/2/4 qscale.
1492 * - encoding: set by user.
1493 * - decoding: unused
1494 */
1495 int global_quality;
1496
1497 #define FF_CODER_TYPE_VLC 0
1498 #define FF_CODER_TYPE_AC 1
1499 /**
1500 * coder type
1501 * - encoding: set by user.
1502 * - decoding: unused
1503 */
1504 int coder_type;
1505
1506 /**
1507 * context model
1508 * - encoding: set by user.
1509 * - decoding: unused
1510 */
1511 int context_model;
1512 #if 0
1513 /**
1514 *
1515 * - encoding: unused
1516 * - decoding: set by user.
1517 */
1518 uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1519 #endif
1520
1521 /**
1522 * slice flags
1523 * - encoding: unused
1524 * - decoding: set by user.
1525 */
1526 int slice_flags;
1527 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1528 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1529 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1530
1531 /**
1532 * XVideo Motion Acceleration
1533 * - encoding: forbidden
1534 * - decoding: set by decoder
1535 */
1536 int xvmc_acceleration;
1537
1538 /**
1539 * macroblock decision mode
1540 * - encoding: set by user.
1541 * - decoding: unused
1542 */
1543 int mb_decision;
1544 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1545 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1546 #define FF_MB_DECISION_RD 2 ///< rate distoration
1547
1548 /**
1549 * custom intra quantization matrix
1550 * - encoding: set by user, can be NULL
1551 * - decoding: set by lavc
1552 */
1553 uint16_t *intra_matrix;
1554
1555 /**
1556 * custom inter quantization matrix
1557 * - encoding: set by user, can be NULL
1558 * - decoding: set by lavc
1559 */
1560 uint16_t *inter_matrix;
1561
1562 /**
1563 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1564 * this is used to workaround some encoder bugs
1565 * - encoding: unused
1566 * - decoding: set by user, will be converted to upper case by lavc during init
1567 */
1568 unsigned int stream_codec_tag;
1569
1570 /**
1571 * scene change detection threshold.
1572 * 0 is default, larger means fewer detected scene changes
1573 * - encoding: set by user.
1574 * - decoding: unused
1575 */
1576 int scenechange_threshold;
1577
1578 /**
1579 * minimum lagrange multipler
1580 * - encoding: set by user.
1581 * - decoding: unused
1582 */
1583 int lmin;
1584
1585 /**
1586 * maximum lagrange multipler
1587 * - encoding: set by user.
1588 * - decoding: unused
1589 */
1590 int lmax;
1591
1592 /**
1593 * Palette control structure
1594 * - encoding: ??? (no palette-enabled encoder yet)
1595 * - decoding: set by user.
1596 */
1597 struct AVPaletteControl *palctrl;
1598
1599 /**
1600 * noise reduction strength
1601 * - encoding: set by user.
1602 * - decoding: unused
1603 */
1604 int noise_reduction;
1605
1606 /**
1607 * called at the beginning of a frame to get cr buffer for it.
1608 * buffer type (size, hints) must be the same. lavc won't check it.
1609 * lavc will pass previous buffer in pic, function should return
1610 * same buffer or new buffer with old frame "painted" into it.
1611 * if pic.data[0] == NULL must behave like get_buffer().
1612 * - encoding: unused
1613 * - decoding: set by lavc, user can override
1614 */
1615 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1616
1617 /**
1618 * number of bits which should be loaded into the rc buffer before decoding starts
1619 * - encoding: set by user.
1620 * - decoding: unused
1621 */
1622 int rc_initial_buffer_occupancy;
1623
1624 /**
1625 *
1626 * - encoding: set by user.
1627 * - decoding: unused
1628 */
1629 int inter_threshold;
1630
1631 /**
1632 * CODEC_FLAG2_*.
1633 * - encoding: set by user.
1634 * - decoding: set by user.
1635 */
1636 int flags2;
1637
1638 /**
1639 * simulates errors in the bitstream to test error concealment.
1640 * - encoding: set by user.
1641 * - decoding: unused.
1642 */
1643 int error_rate;
1644
1645 /**
1646 * MP3 antialias algorithm, see FF_AA_* below.
1647 * - encoding: unused
1648 * - decoding: set by user
1649 */
1650 int antialias_algo;
1651 #define FF_AA_AUTO 0
1652 #define FF_AA_FASTINT 1 //not implemented yet
1653 #define FF_AA_INT 2
1654 #define FF_AA_FLOAT 3
1655 /**
1656 * Quantizer noise shaping.
1657 * - encoding: set by user
1658 * - decoding: unused
1659 */
1660 int quantizer_noise_shaping;
1661
1662 /**
1663 * Thread count.
1664 * is used to decide how many independant tasks should be passed to execute()
1665 * - encoding: set by user
1666 * - decoding: set by user
1667 */
1668 int thread_count;
1669
1670 /**
1671 * the codec may call this to execute several independant things. it will return only after
1672 * finishing all tasks, the user may replace this with some multithreaded implementation, the
1673 * default implementation will execute the parts serially
1674 * @param count the number of things to execute
1675 * - encoding: set by lavc, user can override
1676 * - decoding: set by lavc, user can override
1677 */
1678 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1679
1680 /**
1681 * Thread opaque.
1682 * can be used by execute() to store some per AVCodecContext stuff.
1683 * - encoding: set by execute()
1684 * - decoding: set by execute()
1685 */
1686 void *thread_opaque;
1687
1688 /**
1689 * Motion estimation threshold. under which no motion estimation is
1690 * performed, but instead the user specified motion vectors are used
1691 *
1692 * - encoding: set by user
1693 * - decoding: unused
1694 */
1695 int me_threshold;
1696
1697 /**
1698 * Macroblock threshold. under which the user specified macroblock types will be used
1699 * - encoding: set by user
1700 * - decoding: unused
1701 */
1702 int mb_threshold;
1703
1704 /**
1705 * precision of the intra dc coefficient - 8.
1706 * - encoding: set by user
1707 * - decoding: unused
1708 */
1709 int intra_dc_precision;
1710
1711 /**
1712 * noise vs. sse weight for the nsse comparsion function.
1713 * - encoding: set by user
1714 * - decoding: unused
1715 */
1716 int nsse_weight;
1717
1718 /**
1719 * number of macroblock rows at the top which are skipped.
1720 * - encoding: unused
1721 * - decoding: set by user
1722 */
1723 int skip_top;
1724
1725 /**
1726 * number of macroblock rows at the bottom which are skipped.
1727 * - encoding: unused
1728 * - decoding: set by user
1729 */
1730 int skip_bottom;
1731
1732 /**
1733 * profile
1734 * - encoding: set by user
1735 * - decoding: set by lavc
1736 */
1737 int profile;
1738 #define FF_PROFILE_UNKNOWN -99
1739
1740 /**
1741 * level
1742 * - encoding: set by user
1743 * - decoding: set by lavc
1744 */
1745 int level;
1746 #define FF_LEVEL_UNKNOWN -99
1747
1748 /**
1749 * low resolution decoding. 1-> 1/2 size, 2->1/4 size
1750 * - encoding: unused
1751 * - decoding: set by user
1752 */
1753 int lowres;
1754
1755 /**
1756 * bitsream width / height. may be different from width/height if lowres
1757 * or other things are used
1758 * - encoding: unused
1759 * - decoding: set by user before init if known, codec should override / dynamically change if needed
1760 */
1761 int coded_width, coded_height;
1762
1763 /**
1764 * frame skip threshold
1765 * - encoding: set by user
1766 * - decoding: unused
1767 */
1768 int frame_skip_threshold;
1769
1770 /**
1771 * frame skip factor
1772 * - encoding: set by user
1773 * - decoding: unused
1774 */
1775 int frame_skip_factor;
1776
1777 /**
1778 * frame skip exponent
1779 * - encoding: set by user
1780 * - decoding: unused
1781 */
1782 int frame_skip_exp;
1783
1784 /**
1785 * frame skip comparission function
1786 * - encoding: set by user.
1787 * - decoding: unused
1788 */
1789 int frame_skip_cmp;
1790
1791 /**
1792 * border processing masking. raises the quantizer for mbs on the borders
1793 * of the picture.
1794 * - encoding: set by user
1795 * - decoding: unused
1796 */
1797 float border_masking;
1798
1799 /**
1800 * minimum MB lagrange multipler.
1801 * - encoding: set by user.
1802 * - decoding: unused
1803 */
1804 int mb_lmin;
1805
1806 /**
1807 * maximum MB lagrange multipler.
1808 * - encoding: set by user.
1809 * - decoding: unused
1810 */
1811 int mb_lmax;
1812
1813 /**
1814 *
1815 * - encoding: set by user.
1816 * - decoding: unused
1817 */
1818 int me_penalty_compensation;
1819
1820 /**
1821 *
1822 * - encoding: unused
1823 * - decoding: set by user.
1824 */
1825 enum AVDiscard skip_loop_filter;
1826
1827 /**
1828 *
1829 * - encoding: unused
1830 * - decoding: set by user.
1831 */
1832 enum AVDiscard skip_idct;
1833
1834 /**
1835 *
1836 * - encoding: unused
1837 * - decoding: set by user.
1838 */
1839 enum AVDiscard skip_frame;
1840
1841 /**
1842 *
1843 * - encoding: set by user.
1844 * - decoding: unused
1845 */
1846 int bidir_refine;
1847
1848 /**
1849 *
1850 * - encoding: set by user.
1851 * - decoding: unused
1852 */
1853 int brd_scale;
1854
1855 /**
1856 * constant rate factor - quality-based VBR - values ~correspond to qps
1857 * - encoding: set by user.
1858 * - decoding: unused
1859 */
1860 int crf;
1861
1862 /**
1863 * constant quantization parameter rate control method
1864 * - encoding: set by user.
1865 * - decoding: unused
1866 */
1867 int cqp;
1868
1869 /**
1870 * minimum gop size
1871 * - encoding: set by user.
1872 * - decoding: unused
1873 */
1874 int keyint_min;
1875
1876 /**
1877 * number of reference frames
1878 * - encoding: set by user.
1879 * - decoding: unused
1880 */
1881 int refs;
1882
1883 /**
1884 * chroma qp offset from luma
1885 * - encoding: set by user.
1886 * - decoding: unused
1887 */
1888 int chromaoffset;
1889
1890 /**
1891 * influences how often b-frames are used
1892 * - encoding: set by user.
1893 * - decoding: unused
1894 */
1895 int bframebias;
1896
1897 /**
1898 * trellis RD quantization
1899 * - encoding: set by user.
1900 * - decoding: unused
1901 */
1902 int trellis;
1903
1904 /**
1905 * reduce fluctuations in qp (before curve compression)
1906 * - encoding: set by user.
1907 * - decoding: unused
1908 */
1909 float complexityblur;
1910
1911 /**
1912 * in-loop deblocking filter alphac0 parameter
1913 * alpha is in the range -6...6
1914 * - encoding: set by user.
1915 * - decoding: unused
1916 */
1917 int deblockalpha;
1918
1919 /**
1920 * in-loop deblocking filter beta parameter
1921 * beta is in the range -6...6
1922 * - encoding: set by user.
1923 * - decoding: unused
1924 */
1925 int deblockbeta;
1926
1927 /**
1928 * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
1929 * - encoding: set by user.
1930 * - decoding: unused
1931 */
1932 int partitions;
1933 #define X264_PART_I4X4 0x001 /* Analyse i4x4 */
1934 #define X264_PART_I8X8 0x002 /* Analyse i8x8 (requires 8x8 transform) */
1935 #define X264_PART_P8X8 0x010 /* Analyse p16x8, p8x16 and p8x8 */
1936 #define X264_PART_P4X4 0x020 /* Analyse p8x4, p4x8, p4x4 */
1937 #define X264_PART_B8X8 0x100 /* Analyse b16x8, b8x16 and b8x8 */
1938
1939 /**
1940 * direct mv prediction mode - 0 (none), 1 (spatial), 2 (temporal)
1941 * - encoding: set by user.
1942 * - decoding: unused
1943 */
1944 int directpred;
1945
1946 /**
1947 * audio cutoff bandwidth (0 means "automatic") . Currently used only by FAAC
1948 * - encoding: set by user.
1949 * - decoding: unused
1950 */
1951 int cutoff;
1952
1953 /**
1954 * multiplied by qscale for each frame and added to scene_change_score
1955 * - encoding: set by user.
1956 * - decoding: unused
1957 */
1958 int scenechange_factor;
1959
1960 /**
1961 *
1962 * note: value depends upon the compare functin used for fullpel ME
1963 * - encoding: set by user.
1964 * - decoding: unused
1965 */
1966 int mv0_threshold;
1967
1968 /**
1969 * adjusts sensitivity of b_frame_strategy 1
1970 * - encoding: set by user.
1971 * - decoding: unused
1972 */
1973 int b_sensitivity;
1974
1975 /**
1976 * - encoding: set by user.
1977 * - decoding: unused
1978 */
1979 int compression_level;
1980 #define FF_COMPRESSION_DEFAULT -1
1981
1982 /**
1983 * sets whether to use LPC mode - used by FLAC encoder
1984 * - encoding: set by user.
1985 * - decoding: unused.
1986 */
1987 int use_lpc;
1988
1989 /**
1990 * LPC coefficient precision - used by FLAC encoder
1991 * - encoding: set by user.
1992 * - decoding: unused.
1993 */
1994 int lpc_coeff_precision;
1995
1996 /**
1997 * - encoding: set by user.
1998 * - decoding: unused.
1999 */
2000 int min_prediction_order;
2001
2002 /**
2003 * - encoding: set by user.
2004 * - decoding: unused.
2005 */
2006 int max_prediction_order;
2007
2008 /**
2009 * search method for selecting prediction order
2010 * - encoding: set by user.
2011 * - decoding: unused.
2012 */
2013 int prediction_order_method;
2014
2015 /**
2016 * - encoding: set by user.
2017 * - decoding: unused.
2018 */
2019 int min_partition_order;
2020
2021 /**
2022 * - encoding: set by user.
2023 * - decoding: unused.
2024 */
2025 int max_partition_order;
2026 } AVCodecContext;
2027
2028 /**
2029 * AVCodec.
2030 */
2031 typedef struct AVCodec {
2032 const char *name;
2033 enum CodecType type;
2034 enum CodecID id;
2035 int priv_data_size;
2036 int (*init)(AVCodecContext *);
2037 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2038 int (*close)(AVCodecContext *);
2039 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
2040 uint8_t *buf, int buf_size);
2041 int capabilities;
2042 #if LIBAVCODEC_VERSION_INT < ((50<<16)+(0<<8)+0)
2043 void *dummy; // FIXME remove next time we break binary compatibility
2044 #endif
2045 struct AVCodec *next;
2046 void (*flush)(AVCodecContext *);
2047 const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
2048 const enum PixelFormat *pix_fmts; ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
2049 } AVCodec;
2050
2051 /**
2052 * four components are given, that's all.
2053 * the last component is alpha
2054 */
2055 typedef struct AVPicture {
2056 uint8_t *data[4];
2057 int linesize[4]; ///< number of bytes per line
2058 } AVPicture;
2059
2060 /**
2061 * AVPaletteControl
2062 * This structure defines a method for communicating palette changes
2063 * between and demuxer and a decoder.
2064 */
2065 #define AVPALETTE_SIZE 1024
2066 #define AVPALETTE_COUNT 256
2067 typedef struct AVPaletteControl {
2068
2069 /* demuxer sets this to 1 to indicate the palette has changed;
2070 * decoder resets to 0 */
2071 int palette_changed;
2072
2073 /* 4-byte ARGB palette entries, stored in native byte order; note that
2074 * the individual palette components should be on a 8-bit scale; if
2075 * the palette data comes from a IBM VGA native format, the component
2076 * data is probably 6 bits in size and needs to be scaled */
2077 unsigned int palette[AVPALETTE_COUNT];
2078
2079 } AVPaletteControl;
2080
2081 typedef struct AVSubtitleRect {
2082 uint16_t x;
2083 uint16_t y;
2084 uint16_t w;
2085 uint16_t h;
2086 uint16_t nb_colors;
2087 int linesize;
2088 uint32_t *rgba_palette;
2089 uint8_t *bitmap;
2090 } AVSubtitleRect;
2091
2092 typedef struct AVSubtitle {
2093 uint16_t format; /* 0 = graphics */
2094 uint32_t start_display_time; /* relative to packet pts, in ms */
2095 uint32_t end_display_time; /* relative to packet pts, in ms */
2096 uint32_t num_rects;
2097 AVSubtitleRect *rects;
2098 } AVSubtitle;
2099
2100 extern AVCodec ac3_encoder;
2101 extern AVCodec mp2_encoder;
2102 extern AVCodec mp3lame_encoder;
2103 extern AVCodec oggvorbis_encoder;
2104 extern AVCodec faac_encoder;
2105 extern AVCodec flac_encoder;
2106 extern AVCodec xvid_encoder;
2107 extern AVCodec mpeg1video_encoder;
2108 extern AVCodec mpeg2video_encoder;
2109 extern AVCodec h261_encoder;
2110 extern AVCodec h263_encoder;
2111 extern AVCodec h263p_encoder;
2112 extern AVCodec flv_encoder;
2113 extern AVCodec rv10_encoder;
2114 extern AVCodec rv20_encoder;
2115 extern AVCodec dvvideo_encoder;
2116 extern AVCodec mjpeg_encoder;
2117 extern AVCodec ljpeg_encoder;
2118 extern AVCodec jpegls_encoder;
2119 extern AVCodec png_encoder;
2120 extern AVCodec ppm_encoder;
2121 extern AVCodec pgm_encoder;
2122 extern AVCodec pgmyuv_encoder;
2123 extern AVCodec pbm_encoder;
2124 extern AVCodec pam_encoder;
2125 extern AVCodec mpeg4_encoder;
2126 extern AVCodec msmpeg4v1_encoder;
2127 extern AVCodec msmpeg4v2_encoder;
2128 extern AVCodec msmpeg4v3_encoder;
2129 extern AVCodec wmv1_encoder;
2130 extern AVCodec wmv2_encoder;
2131 extern AVCodec huffyuv_encoder;
2132 extern AVCodec ffvhuff_encoder;
2133 extern AVCodec h264_encoder;
2134 extern AVCodec asv1_encoder;
2135 extern AVCodec asv2_encoder;
2136 extern AVCodec vcr1_encoder;
2137 extern AVCodec ffv1_encoder;
2138 extern AVCodec snow_encoder;
2139 extern AVCodec mdec_encoder;
2140 extern AVCodec zlib_encoder;
2141 extern AVCodec sonic_encoder;
2142 extern AVCodec sonic_ls_encoder;
2143 extern AVCodec svq1_encoder;
2144 extern AVCodec x264_encoder;
2145
2146 extern AVCodec h263_decoder;
2147 extern AVCodec h261_decoder;
2148 extern AVCodec mpeg4_decoder;
2149 extern AVCodec msmpeg4v1_decoder;
2150 extern AVCodec msmpeg4v2_decoder;
2151 extern AVCodec msmpeg4v3_decoder;
2152 extern AVCodec wmv1_decoder;
2153 extern AVCodec wmv2_decoder;
2154 extern AVCodec vc1_decoder;
2155 extern AVCodec wmv3_decoder;
2156 extern AVCodec mpeg1video_decoder;
2157 extern AVCodec mpeg2video_decoder;
2158 extern AVCodec mpegvideo_decoder;
2159 extern AVCodec mpeg_xvmc_decoder;
2160 extern AVCodec h263i_decoder;
2161 extern AVCodec flv_decoder;
2162 extern AVCodec rv10_decoder;
2163 extern AVCodec rv20_decoder;
2164 extern AVCodec rv30_decoder;
2165 extern AVCodec rv40_decoder;
2166 extern AVCodec svq1_decoder;
2167 extern AVCodec svq3_decoder;
2168 extern AVCodec dvvideo_decoder;
2169 extern AVCodec wmav1_decoder;
2170 extern AVCodec wmav2_decoder;
2171 extern AVCodec mjpeg_decoder;
2172 extern AVCodec mjpegb_decoder;
2173 extern AVCodec sp5x_decoder;
2174 extern AVCodec png_decoder;
2175 extern AVCodec mp2_decoder;
2176 extern AVCodec mp3_decoder;
2177 extern AVCodec mp3adu_decoder;
2178 extern AVCodec mp3on4_decoder;
2179 extern AVCodec qdm2_decoder;
2180 extern AVCodec cook_decoder;
2181 extern AVCodec truespeech_decoder;
2182 extern AVCodec tta_decoder;
2183 extern AVCodec mace3_decoder;
2184 extern AVCodec mace6_decoder;
2185 extern AVCodec huffyuv_decoder;
2186 extern AVCodec ffvhuff_decoder;
2187 extern AVCodec oggvorbis_decoder;
2188 extern AVCodec cyuv_decoder;
2189 extern AVCodec h264_decoder;
2190 extern AVCodec indeo3_decoder;
2191 extern AVCodec vp3_decoder;
2192 extern AVCodec theora_decoder;
2193 extern AVCodec amr_nb_decoder;
2194 extern AVCodec amr_nb_encoder;
2195 extern AVCodec amr_wb_encoder;
2196 extern AVCodec amr_wb_decoder;
2197 extern AVCodec aac_decoder;
2198 extern AVCodec mpeg4aac_decoder;
2199 extern AVCodec asv1_decoder;
2200 extern AVCodec asv2_decoder;
2201 extern AVCodec vcr1_decoder;
2202 extern AVCodec cljr_decoder;
2203 extern AVCodec ffv1_decoder;
2204 extern AVCodec snow_decoder;
2205 extern AVCodec fourxm_decoder;
2206 extern AVCodec mdec_decoder;
2207 extern AVCodec roq_decoder;
2208 extern AVCodec interplay_video_decoder;
2209 extern AVCodec xan_wc3_decoder;
2210 extern AVCodec rpza_decoder;
2211 extern AVCodec cinepak_decoder;
2212 extern AVCodec msrle_decoder;
2213 extern AVCodec msvideo1_decoder;
2214 extern AVCodec vqa_decoder;
2215 extern AVCodec idcin_decoder;
2216 extern AVCodec eightbps_decoder;
2217 extern AVCodec smc_decoder;
2218 extern AVCodec flic_decoder;
2219 extern AVCodec vmdvideo_decoder;
2220 extern AVCodec vmdaudio_decoder;
2221 extern AVCodec truemotion1_decoder;
2222 extern AVCodec truemotion2_decoder;
2223 extern AVCodec mszh_decoder;
2224 extern AVCodec zlib_decoder;
2225 extern AVCodec ra_144_decoder;
2226 extern AVCodec ra_288_decoder;
2227 extern AVCodec roq_dpcm_decoder;
2228 extern AVCodec interplay_dpcm_decoder;
2229 extern AVCodec xan_dpcm_decoder;
2230 extern AVCodec sol_dpcm_decoder;
2231 extern AVCodec sonic_decoder;
2232 extern AVCodec qtrle_decoder;
2233 extern AVCodec flac_decoder;
2234 extern AVCodec tscc_decoder;
2235 extern AVCodec cscd_decoder;
2236 extern AVCodec nuv_decoder;
2237 extern AVCodec ulti_decoder;
2238 extern AVCodec qdraw_decoder;
2239 extern AVCodec xl_decoder;
2240 extern AVCodec qpeg_decoder;
2241 extern AVCodec shorten_decoder;
2242 extern AVCodec loco_decoder;
2243 extern AVCodec wnv1_decoder;
2244 extern AVCodec aasc_decoder;
2245 extern AVCodec alac_decoder;
2246 extern AVCodec ws_snd1_decoder;
2247 extern AVCodec indeo2_decoder;
2248 extern AVCodec vorbis_decoder;
2249 extern AVCodec fraps_decoder;
2250 extern AVCodec libgsm_encoder;
2251 extern AVCodec libgsm_decoder;
2252 extern AVCodec bmp_decoder;
2253 extern AVCodec mmvideo_decoder;
2254 extern AVCodec zmbv_decoder;
2255 extern AVCodec avs_decoder;
2256 extern AVCodec smacker_decoder;
2257 extern AVCodec smackaud_decoder;
2258 extern AVCodec kmvc_decoder;
2259 extern AVCodec flashsv_decoder;
2260 extern AVCodec cavs_decoder;
2261
2262 /* pcm codecs */
2263 #define PCM_CODEC(id, name) \
2264 extern AVCodec name ## _decoder; \
2265 extern AVCodec name ## _encoder
2266
2267 PCM_CODEC(CODEC_ID_PCM_S32LE, pcm_s32le);
2268 PCM_CODEC(CODEC_ID_PCM_S32BE, pcm_s32be);
2269 PCM_CODEC(CODEC_ID_PCM_U32LE, pcm_u32le);
2270 PCM_CODEC(CODEC_ID_PCM_U32BE, pcm_u32be);
2271 PCM_CODEC(CODEC_ID_PCM_S24LE, pcm_s24le);
2272 PCM_CODEC(CODEC_ID_PCM_S24BE, pcm_s24be);
2273 PCM_CODEC(CODEC_ID_PCM_U24LE, pcm_u24le);
2274 PCM_CODEC(CODEC_ID_PCM_U24BE, pcm_u24be);
2275 PCM_CODEC(CODEC_ID_PCM_S24DAUD, pcm_s24daud);
2276 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
2277 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
2278 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
2279 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
2280 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
2281 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
2282 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
2283 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
2284
2285 /* adpcm codecs */
2286
2287 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
2288 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
2289 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
2290 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
2291 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
2292 PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
2293 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
2294 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
2295 PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
2296 PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
2297 PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
2298 PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
2299 PCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
2300 PCM_CODEC(CODEC_ID_ADPCM_SWF, adpcm_swf);
2301 PCM_CODEC(CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha);
2302 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4);
2303 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3);
2304 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_2, adpcm_sbpro_2);
2305
2306 #undef PCM_CODEC
2307
2308 /* dummy raw video codec */
2309 extern AVCodec rawvideo_encoder;
2310 extern AVCodec rawvideo_decoder;
2311
2312 /* the following codecs use external GPL libs */
2313 extern AVCodec ac3_decoder;
2314 extern AVCodec dts_decoder;
2315
2316 /* subtitles */
2317 extern AVCodec dvdsub_encoder;
2318 extern AVCodec dvdsub_decoder;
2319 extern AVCodec dvbsub_encoder;
2320 extern AVCodec dvbsub_decoder;
2321
2322 /* resample.c */
2323
2324 struct ReSampleContext;
2325 struct AVResampleContext;
2326
2327 typedef struct ReSampleContext ReSampleContext;
2328
2329 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2330 int output_rate, int input_rate);
2331 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2332 void audio_resample_close(ReSampleContext *s);
2333
2334 struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2335 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2336 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2337 void av_resample_close(struct AVResampleContext *c);
2338
2339 /* YUV420 format is assumed ! */
2340
2341 struct ImgReSampleContext;
2342
2343 typedef struct ImgReSampleContext ImgReSampleContext;
2344
2345 ImgReSampleContext *img_resample_init(int output_width, int output_height,
2346 int input_width, int input_height);
2347
2348 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
2349 int iwidth, int iheight,
2350 int topBand, int bottomBand,
2351 int leftBand, int rightBand,
2352 int padtop, int padbottom,
2353 int padleft, int padright);
2354
2355
2356 void img_resample(ImgReSampleContext *s,
2357 AVPicture *output, const AVPicture *input);
2358
2359 void img_resample_close(ImgReSampleContext *s);
2360
2361 /**
2362 * Allocate memory for a picture. Call avpicture_free to free it.
2363 *
2364 * @param picture the picture to be filled in.
2365 * @param pix_fmt the format of the picture.
2366 * @param width the width of the picture.
2367 * @param height the height of the picture.
2368 * @return 0 if successful, -1 if not.
2369 */
2370 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2371
2372 /* Free a picture previously allocated by avpicture_alloc. */
2373 void avpicture_free(AVPicture *picture);
2374
2375 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2376 int pix_fmt, int width, int height);
2377 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2378 unsigned char *dest, int dest_size);
2379 int avpicture_get_size(int pix_fmt, int width, int height);
2380 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2381 const char *avcodec_get_pix_fmt_name(int pix_fmt);
2382 void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2383 enum PixelFormat avcodec_get_pix_fmt(const char* name);
2384 unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2385
2386 #define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
2387 #define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
2388 #define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
2389 #define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
2390 #define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
2391 #define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
2392
2393 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2394 int has_alpha);
2395 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2396 int has_alpha, int *loss_ptr);
2397
2398 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
2399 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
2400 int img_get_alpha_info(const AVPicture *src,
2401 int pix_fmt, int width, int height);
2402
2403 /* convert among pixel formats */
2404 int img_convert(AVPicture *dst, int dst_pix_fmt,
2405 const AVPicture *src, int pix_fmt,
2406 int width, int height);
2407
2408 /* deinterlace a picture */
2409 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2410 int pix_fmt, int width, int height);
2411
2412 /* external high level API */
2413
2414 extern AVCodec *first_avcodec;
2415
2416 /* returns LIBAVCODEC_VERSION_INT constant */
2417 unsigned avcodec_version(void);
2418 /* returns LIBAVCODEC_BUILD constant */
2419 unsigned avcodec_build(void);
2420 void avcodec_init(void);
2421
2422 void register_avcodec(AVCodec *format);
2423 AVCodec *avcodec_find_encoder(enum CodecID id);
2424 AVCodec *avcodec_find_encoder_by_name(const char *name);
2425 AVCodec *avcodec_find_decoder(enum CodecID id);
2426 AVCodec *avcodec_find_decoder_by_name(const char *name);
2427 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2428
2429 void avcodec_get_context_defaults(AVCodecContext *s);
2430 AVCodecContext *avcodec_alloc_context(void);
2431 void avcodec_get_frame_defaults(AVFrame *pic);
2432 AVFrame *avcodec_alloc_frame(void);
2433
2434 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2435 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2436 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2437 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2438 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2439 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2440
2441 int avcodec_thread_init(AVCodecContext *s, int thread_count);
2442 void avcodec_thread_free(AVCodecContext *s);
2443 int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2444 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2445 //FIXME func typedef
2446
2447 /**
2448 * opens / inits the AVCodecContext.
2449 * not thread save!
2450 */
2451 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2452
2453 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2454 int *frame_size_ptr,
2455 uint8_t *buf, int buf_size);
2456 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2457 int *got_picture_ptr,
2458 uint8_t *buf, int buf_size);
2459 int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
2460 int *got_sub_ptr,
2461 const uint8_t *buf, int buf_size);
2462 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2463 int *data_size_ptr,
2464 uint8_t *buf, int buf_size);
2465 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2466 const short *samples);
2467 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2468 const AVFrame *pict);
2469 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2470 const AVSubtitle *sub);
2471
2472 int avcodec_close(AVCodecContext *avctx);
2473
2474 void avcodec_register_all(void);
2475
2476 void avcodec_flush_buffers(AVCodecContext *avctx);
2477
2478 void avcodec_default_free_buffers(AVCodecContext *s);
2479
2480 /* misc usefull functions */
2481
2482 /**
2483 * returns a single letter to describe the picture type
2484 */
2485 char av_get_pict_type_char(int pict_type);
2486
2487 /**
2488 * returns codec bits per sample
2489 */
2490 int av_get_bits_per_sample(enum CodecID codec_id);
2491
2492 /* frame parsing */
2493 typedef struct AVCodecParserContext {
2494 void *priv_data;
2495 struct AVCodecParser *parser;
2496 int64_t frame_offset; /* offset of the current frame */
2497 int64_t cur_offset; /* current offset
2498 (incremented by each av_parser_parse()) */
2499 int64_t last_frame_offset; /* offset of the last frame */
2500 /* video info */
2501 int pict_type; /* XXX: put it back in AVCodecContext */
2502 int repeat_pict; /* XXX: put it back in AVCodecContext */
2503 int64_t pts; /* pts of the current frame */
2504 int64_t dts; /* dts of the current frame */
2505
2506 /* private data */
2507 int64_t last_pts;
2508 int64_t last_dts;
2509 int fetch_timestamp;
2510
2511 #define AV_PARSER_PTS_NB 4
2512 int cur_frame_start_index;
2513 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2514 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2515 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2516
2517 int flags;
2518 #define PARSER_FLAG_COMPLETE_FRAMES 0x0001
2519 } AVCodecParserContext;
2520
2521 typedef struct AVCodecParser {
2522 int codec_ids[5]; /* several codec IDs are permitted */
2523 int priv_data_size;
2524 int (*parser_init)(AVCodecParserContext *s);
2525 int (*parser_parse)(AVCodecParserContext *s,
2526 AVCodecContext *avctx,
2527 uint8_t **poutbuf, int *poutbuf_size,
2528 const uint8_t *buf, int buf_size);
2529 void (*parser_close)(AVCodecParserContext *s);
2530 int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
2531 struct AVCodecParser *next;
2532 } AVCodecParser;
2533
2534 extern AVCodecParser *av_first_parser;
2535
2536 void av_register_codec_parser(AVCodecParser *parser);
2537 AVCodecParserContext *av_parser_init(int codec_id);
2538 int av_parser_parse(AVCodecParserContext *s,
2539 AVCodecContext *avctx,
2540 uint8_t **poutbuf, int *poutbuf_size,
2541 const uint8_t *buf, int buf_size,
2542 int64_t pts, int64_t dts);
2543 int av_parser_change(AVCodecParserContext *s,
2544 AVCodecContext *avctx,
2545 uint8_t **poutbuf, int *poutbuf_size,
2546 const uint8_t *buf, int buf_size, int keyframe);
2547 void av_parser_close(AVCodecParserContext *s);
2548
2549 extern AVCodecParser mpegvideo_parser;
2550 extern AVCodecParser mpeg4video_parser;
2551 extern AVCodecParser cavsvideo_parser;
2552 extern AVCodecParser h261_parser;
2553 extern AVCodecParser h263_parser;
2554 extern AVCodecParser h264_parser;
2555 extern AVCodecParser mjpeg_parser;
2556 extern AVCodecParser pnm_parser;
2557 extern AVCodecParser mpegaudio_parser;
2558 extern AVCodecParser ac3_parser;
2559 extern AVCodecParser dvdsub_parser;
2560 extern AVCodecParser dvbsub_parser;
2561 extern AVCodecParser aac_parser;
2562
2563
2564 typedef struct AVBitStreamFilterContext {
2565 void *priv_data;
2566 struct AVBitStreamFilter *filter;
2567 AVCodecParserContext *parser;
2568 struct AVBitStreamFilterContext *next;
2569 } AVBitStreamFilterContext;
2570
2571
2572 typedef struct AVBitStreamFilter {
2573 const char *name;
2574 int priv_data_size;
2575 int (*filter)(AVBitStreamFilterContext *bsfc,
2576 AVCodecContext *avctx, const char *args,
2577 uint8_t **poutbuf, int *poutbuf_size,
2578 const uint8_t *buf, int buf_size, int keyframe);
2579 struct AVBitStreamFilter *next;
2580 } AVBitStreamFilter;
2581
2582 extern AVBitStreamFilter *av_first_bitstream_filter;
2583
2584 void av_register_bitstream_filter(AVBitStreamFilter *bsf);
2585 AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
2586 int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
2587 AVCodecContext *avctx, const char *args,
2588 uint8_t **poutbuf, int *poutbuf_size,
2589 const uint8_t *buf, int buf_size, int keyframe);
2590 void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
2591
2592 extern AVBitStreamFilter dump_extradata_bsf;
2593 extern AVBitStreamFilter remove_extradata_bsf;
2594 extern AVBitStreamFilter noise_bsf;
2595
2596
2597 /* memory */
2598 void *av_mallocz(unsigned int size);
2599 char *av_strdup(const char *s);
2600 void av_freep(void *ptr);
2601 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2602 /* for static data only */
2603 /* call av_free_static to release all staticaly allocated tables */
2604 void av_free_static(void);
2605 void *av_mallocz_static(unsigned int size);
2606 void *av_realloc_static(void *ptr, unsigned int size);
2607
2608 void img_copy(AVPicture *dst, const AVPicture *src,
2609 int pix_fmt, int width, int height);
2610
2611 int img_crop(AVPicture *dst, const AVPicture *src,
2612 int pix_fmt, int top_band, int left_band);
2613
2614 int img_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
2615 int padtop, int padbottom, int padleft, int padright, int *color);
2616
2617 /* endian macros */
2618 #if !defined(BE_16) || !defined(BE_32) || !defined(LE_16) || !defined(LE_32)
2619 #define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
2620 #define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
2621 (((uint8_t*)(x))[1] << 16) | \
2622 (((uint8_t*)(x))[2] << 8) | \
2623 ((uint8_t*)(x))[3])
2624 #define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
2625 #define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \
2626 (((uint8_t*)(x))[2] << 16) | \
2627 (((uint8_t*)(x))[1] << 8) | \
2628 ((uint8_t*)(x))[0])
2629 #endif
2630
2631 extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
2632
2633 #ifdef __cplusplus
2634 }
2635 #endif
2636
2637 #endif /* AVCODEC_H */