Align the input buffer in ffplay, introduce a public macro for aligned declarations
[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)+(12<<8)+0)
21 #define LIBAVCODEC_VERSION 51.12.0
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 CODEC_ID_JPEG2000,
123
124 /* various pcm "codecs" */
125 CODEC_ID_PCM_S16LE= 0x10000,
126 CODEC_ID_PCM_S16BE,
127 CODEC_ID_PCM_U16LE,
128 CODEC_ID_PCM_U16BE,
129 CODEC_ID_PCM_S8,
130 CODEC_ID_PCM_U8,
131 CODEC_ID_PCM_MULAW,
132 CODEC_ID_PCM_ALAW,
133 CODEC_ID_PCM_S32LE,
134 CODEC_ID_PCM_S32BE,
135 CODEC_ID_PCM_U32LE,
136 CODEC_ID_PCM_U32BE,
137 CODEC_ID_PCM_S24LE,
138 CODEC_ID_PCM_S24BE,
139 CODEC_ID_PCM_U24LE,
140 CODEC_ID_PCM_U24BE,
141 CODEC_ID_PCM_S24DAUD,
142
143 /* various adpcm codecs */
144 CODEC_ID_ADPCM_IMA_QT= 0x11000,
145 CODEC_ID_ADPCM_IMA_WAV,
146 CODEC_ID_ADPCM_IMA_DK3,
147 CODEC_ID_ADPCM_IMA_DK4,
148 CODEC_ID_ADPCM_IMA_WS,
149 CODEC_ID_ADPCM_IMA_SMJPEG,
150 CODEC_ID_ADPCM_MS,
151 CODEC_ID_ADPCM_4XM,
152 CODEC_ID_ADPCM_XA,
153 CODEC_ID_ADPCM_ADX,
154 CODEC_ID_ADPCM_EA,
155 CODEC_ID_ADPCM_G726,
156 CODEC_ID_ADPCM_CT,
157 CODEC_ID_ADPCM_SWF,
158 CODEC_ID_ADPCM_YAMAHA,
159 CODEC_ID_ADPCM_SBPRO_4,
160 CODEC_ID_ADPCM_SBPRO_3,
161 CODEC_ID_ADPCM_SBPRO_2,
162
163 /* AMR */
164 CODEC_ID_AMR_NB= 0x12000,
165 CODEC_ID_AMR_WB,
166
167 /* RealAudio codecs*/
168 CODEC_ID_RA_144= 0x13000,
169 CODEC_ID_RA_288,
170
171 /* various DPCM codecs */
172 CODEC_ID_ROQ_DPCM= 0x14000,
173 CODEC_ID_INTERPLAY_DPCM,
174 CODEC_ID_XAN_DPCM,
175 CODEC_ID_SOL_DPCM,
176
177 CODEC_ID_MP2= 0x15000,
178 CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
179 CODEC_ID_AAC,
180 CODEC_ID_MPEG4AAC,
181 CODEC_ID_AC3,
182 CODEC_ID_DTS,
183 CODEC_ID_VORBIS,
184 CODEC_ID_DVAUDIO,
185 CODEC_ID_WMAV1,
186 CODEC_ID_WMAV2,
187 CODEC_ID_MACE3,
188 CODEC_ID_MACE6,
189 CODEC_ID_VMDAUDIO,
190 CODEC_ID_SONIC,
191 CODEC_ID_SONIC_LS,
192 CODEC_ID_FLAC,
193 CODEC_ID_MP3ADU,
194 CODEC_ID_MP3ON4,
195 CODEC_ID_SHORTEN,
196 CODEC_ID_ALAC,
197 CODEC_ID_WESTWOOD_SND1,
198 CODEC_ID_GSM,
199 CODEC_ID_QDM2,
200 CODEC_ID_COOK,
201 CODEC_ID_TRUESPEECH,
202 CODEC_ID_TTA,
203 CODEC_ID_SMACKAUDIO,
204 CODEC_ID_QCELP,
205
206 /* subtitle codecs */
207 CODEC_ID_DVD_SUBTITLE= 0x17000,
208 CODEC_ID_DVB_SUBTITLE,
209
210 CODEC_ID_MPEG2TS= 0x20000, /* _FAKE_ codec to indicate a raw MPEG2 transport
211 stream (only used by libavformat) */
212 };
213
214 /* CODEC_ID_MP3LAME is absolete */
215 #define CODEC_ID_MP3LAME CODEC_ID_MP3
216
217 enum CodecType {
218 CODEC_TYPE_UNKNOWN = -1,
219 CODEC_TYPE_VIDEO,
220 CODEC_TYPE_AUDIO,
221 CODEC_TYPE_DATA,
222 CODEC_TYPE_SUBTITLE,
223 };
224
225 /* currently unused, may be used if 24/32 bits samples ever supported */
226 /* all in native endian */
227 enum SampleFormat {
228 SAMPLE_FMT_NONE = -1,
229 SAMPLE_FMT_U8, ///< unsigned 8 bits
230 SAMPLE_FMT_S16, ///< signed 16 bits
231 SAMPLE_FMT_S24, ///< signed 24 bits
232 SAMPLE_FMT_S32, ///< signed 32 bits
233 SAMPLE_FMT_FLT, ///< float
234 };
235
236 /* in bytes */
237 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
238
239 /**
240 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
241 * this is mainly needed because some optimized bitstream readers read
242 * 32 or 64 bit at once and could read over the end<br>
243 * Note, if the first 23 bits of the additional bytes are not 0 then damaged
244 * MPEG bitstreams could cause overread and segfault
245 */
246 #define FF_INPUT_BUFFER_PADDING_SIZE 8
247
248 /**
249 * minimum encoding buffer size.
250 * used to avoid some checks during header writing
251 */
252 #define FF_MIN_BUFFER_SIZE 16384
253
254 /* motion estimation type, EPZS by default */
255 enum Motion_Est_ID {
256 ME_ZERO = 1,
257 ME_FULL,
258 ME_LOG,
259 ME_PHODS,
260 ME_EPZS,
261 ME_X1,
262 ME_HEX,
263 ME_UMH,
264 ME_ITER,
265 };
266
267 enum AVDiscard{
268 //we leave some space between them for extensions (drop some keyframes for intra only or drop just some bidir frames)
269 AVDISCARD_NONE =-16, ///< discard nothing
270 AVDISCARD_DEFAULT= 0, ///< discard useless packets like 0 size packets in avi
271 AVDISCARD_NONREF = 8, ///< discard all non reference
272 AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
273 AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
274 AVDISCARD_ALL = 48, ///< discard all
275 };
276
277 typedef struct RcOverride{
278 int start_frame;
279 int end_frame;
280 int qscale; // if this is 0 then quality_factor will be used instead
281 float quality_factor;
282 } RcOverride;
283
284 #define FF_MAX_B_FRAMES 16
285
286 /* encoding support
287 these flags can be passed in AVCodecContext.flags before initing
288 Note: not everything is supported yet.
289 */
290
291 #define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
292 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / Advanced prediction for H263
293 #define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
294 #define CODEC_FLAG_GMC 0x0020 ///< use GMC
295 #define CODEC_FLAG_MV0 0x0040 ///< always try a MB with MV=<0,0>
296 #define CODEC_FLAG_PART 0x0080 ///< use data partitioning
297 /* parent program gurantees that the input for b-frame containing streams is not written to
298 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
299 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
300 #define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
301 #define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
302 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
303 #define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
304 #define CODEC_FLAG_EMU_EDGE 0x4000///< don't draw edges
305 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
306 #define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
307 of only at frame boundaries */
308 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
309 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
310 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay
311 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
312 #define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
313 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
314 #define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
315 /* Fx : Flag for h263+ extra options */
316 #define CODEC_FLAG_H263P_AIC 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
317 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
318 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
319 #define CODEC_FLAG_CBP_RD 0x04000000 ///< use rate distortion optimization for cbp
320 #define CODEC_FLAG_QP_RD 0x08000000 ///< use rate distortion optimization for qp selectioon
321 #define CODEC_FLAG_H263P_AIV 0x00000008 ///< H263 Alternative inter vlc
322 #define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
323 #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
324 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
325 #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
326 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
327 #define CODEC_FLAG_CLOSED_GOP ((int)0x80000000)
328 #define CODEC_FLAG2_FAST 0x00000001 ///< allow non spec compliant speedup tricks
329 #define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< strictly enforce GOP size
330 #define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< skip bitstream encoding
331 #define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< place global headers at every keyframe instead of in extradata
332 #define CODEC_FLAG2_BPYRAMID 0x00000010 ///< H.264 allow b-frames to be used as references
333 #define CODEC_FLAG2_WPRED 0x00000020 ///< H.264 weighted biprediction for b-frames
334 #define CODEC_FLAG2_MIXED_REFS 0x00000040 ///< H.264 multiple references per partition
335 #define CODEC_FLAG2_8X8DCT 0x00000080 ///< H.264 high profile 8x8 transform
336 #define CODEC_FLAG2_FASTPSKIP 0x00000100 ///< H.264 fast pskip
337 #define CODEC_FLAG2_AUD 0x00000200 ///< H.264 access unit delimiters
338 #define CODEC_FLAG2_BRDO 0x00000400 ///< b-frame rate-distortion optimization
339 #define CODEC_FLAG2_INTRA_VLC 0x00000800 ///< use MPEG-2 intra VLC table
340 #define CODEC_FLAG2_MEMC_ONLY 0x00001000 ///< only do ME/MC (I frames -> ref, P frame -> ME+MC)
341
342 /* Unsupported options :
343 * Syntax Arithmetic coding (SAC)
344 * Reference Picture Selection
345 * Independant Segment Decoding */
346 /* /Fx */
347 /* codec capabilities */
348
349 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
350 /**
351 * Codec uses get_buffer() for allocating buffers.
352 * direct rendering method 1
353 */
354 #define CODEC_CAP_DR1 0x0002
355 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
356 used */
357 #define CODEC_CAP_PARSE_ONLY 0x0004
358 #define CODEC_CAP_TRUNCATED 0x0008
359 /* codec can export data for HW decoding (XvMC) */
360 #define CODEC_CAP_HWACCEL 0x0010
361 /**
362 * codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data.
363 * if this is not set, the codec is guranteed to never be feeded with NULL data
364 */
365 #define CODEC_CAP_DELAY 0x0020
366 /**
367 * Codec can be fed a final frame with a smaller size.
368 * This can be used to prevent truncation of the last audio samples.
369 */
370 #define CODEC_CAP_SMALL_LAST_FRAME 0x0040
371
372 //the following defines may change, don't expect compatibility if you use them
373 #define MB_TYPE_INTRA4x4 0x0001
374 #define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
375 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME h264 specific
376 #define MB_TYPE_16x16 0x0008
377 #define MB_TYPE_16x8 0x0010
378 #define MB_TYPE_8x16 0x0020
379 #define MB_TYPE_8x8 0x0040
380 #define MB_TYPE_INTERLACED 0x0080
381 #define MB_TYPE_DIRECT2 0x0100 //FIXME
382 #define MB_TYPE_ACPRED 0x0200
383 #define MB_TYPE_GMC 0x0400
384 #define MB_TYPE_SKIP 0x0800
385 #define MB_TYPE_P0L0 0x1000
386 #define MB_TYPE_P1L0 0x2000
387 #define MB_TYPE_P0L1 0x4000
388 #define MB_TYPE_P1L1 0x8000
389 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
390 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
391 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
392 #define MB_TYPE_QUANT 0x00010000
393 #define MB_TYPE_CBP 0x00020000
394 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
395
396 /**
397 * Pan Scan area.
398 * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
399 */
400 typedef struct AVPanScan{
401 /**
402 * id.
403 * - encoding: set by user.
404 * - decoding: set by lavc
405 */
406 int id;
407
408 /**
409 * width and height in 1/16 pel
410 * - encoding: set by user.
411 * - decoding: set by lavc
412 */
413 int width;
414 int height;
415
416 /**
417 * position of the top left corner in 1/16 pel for up to 3 fields/frames.
418 * - encoding: set by user.
419 * - decoding: set by lavc
420 */
421 int16_t position[3][2];
422 }AVPanScan;
423
424 #define FF_COMMON_FRAME \
425 /**\
426 * pointer to the picture planes.\
427 * this might be different from the first allocated byte\
428 * - encoding: \
429 * - decoding: \
430 */\
431 uint8_t *data[4];\
432 int linesize[4];\
433 /**\
434 * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
435 * this isn't used by lavc unless the default get/release_buffer() is used\
436 * - encoding: \
437 * - decoding: \
438 */\
439 uint8_t *base[4];\
440 /**\
441 * 1 -> keyframe, 0-> not\
442 * - encoding: set by lavc\
443 * - decoding: set by lavc\
444 */\
445 int key_frame;\
446 \
447 /**\
448 * picture type of the frame, see ?_TYPE below.\
449 * - encoding: set by lavc for coded_picture (and set by user for input)\
450 * - decoding: set by lavc\
451 */\
452 int pict_type;\
453 \
454 /**\
455 * presentation timestamp in time_base units (time when frame should be shown to user)\
456 * if AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed\
457 * - encoding: MUST be set by user\
458 * - decoding: set by lavc\
459 */\
460 int64_t pts;\
461 \
462 /**\
463 * picture number in bitstream order.\
464 * - encoding: set by\
465 * - decoding: set by lavc\
466 */\
467 int coded_picture_number;\
468 /**\
469 * picture number in display order.\
470 * - encoding: set by\
471 * - decoding: set by lavc\
472 */\
473 int display_picture_number;\
474 \
475 /**\
476 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
477 * - encoding: set by lavc for coded_picture (and set by user for input)\
478 * - decoding: set by lavc\
479 */\
480 int quality; \
481 \
482 /**\
483 * buffer age (1->was last buffer and dint change, 2->..., ...).\
484 * set to INT_MAX if the buffer has not been used yet \
485 * - encoding: unused\
486 * - decoding: MUST be set by get_buffer()\
487 */\
488 int age;\
489 \
490 /**\
491 * is this picture used as reference\
492 * - encoding: unused\
493 * - decoding: set by lavc (before get_buffer() call))\
494 */\
495 int reference;\
496 \
497 /**\
498 * QP table\
499 * - encoding: unused\
500 * - decoding: set by lavc\
501 */\
502 int8_t *qscale_table;\
503 /**\
504 * QP store stride\
505 * - encoding: unused\
506 * - decoding: set by lavc\
507 */\
508 int qstride;\
509 \
510 /**\
511 * mbskip_table[mb]>=1 if MB didnt change\
512 * stride= mb_width = (width+15)>>4\
513 * - encoding: unused\
514 * - decoding: set by lavc\
515 */\
516 uint8_t *mbskip_table;\
517 \
518 /**\
519 * Motion vector table.\
520 * @code\
521 * example:\
522 * int mv_sample_log2= 4 - motion_subsample_log2;\
523 * int mb_width= (width+15)>>4;\
524 * int mv_stride= (mb_width << mv_sample_log2) + 1;\
525 * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
526 * @endcode\
527 * - encoding: set by user\
528 * - decoding: set by lavc\
529 */\
530 int16_t (*motion_val[2])[2];\
531 \
532 /**\
533 * Macroblock type table\
534 * mb_type_base + mb_width + 2\
535 * - encoding: set by user\
536 * - decoding: set by lavc\
537 */\
538 uint32_t *mb_type;\
539 \
540 /**\
541 * log2 of the size of the block which a single vector in motion_val represents: \
542 * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
543 * - encoding: unused\
544 * - decoding: set by lavc\
545 */\
546 uint8_t motion_subsample_log2;\
547 \
548 /**\
549 * for some private data of the user\
550 * - encoding: unused\
551 * - decoding: set by user\
552 */\
553 void *opaque;\
554 \
555 /**\
556 * error\
557 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
558 * - decoding: unused\
559 */\
560 uint64_t error[4];\
561 \
562 /**\
563 * type of the buffer (to keep track of who has to dealloc data[*])\
564 * - encoding: set by the one who allocs it\
565 * - decoding: set by the one who allocs it\
566 * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
567 */\
568 int type;\
569 \
570 /**\
571 * when decoding, this signal how much the picture must be delayed.\
572 * extra_delay = repeat_pict / (2*fps)\
573 * - encoding: unused\
574 * - decoding: set by lavc\
575 */\
576 int repeat_pict;\
577 \
578 /**\
579 * \
580 */\
581 int qscale_type;\
582 \
583 /**\
584 * The content of the picture is interlaced.\
585 * - encoding: set by user\
586 * - decoding: set by lavc (default 0)\
587 */\
588 int interlaced_frame;\
589 \
590 /**\
591 * if the content is interlaced, is top field displayed first.\
592 * - encoding: set by user\
593 * - decoding: set by lavc\
594 */\
595 int top_field_first;\
596 \
597 /**\
598 * Pan scan.\
599 * - encoding: set by user\
600 * - decoding: set by lavc\
601 */\
602 AVPanScan *pan_scan;\
603 \
604 /**\
605 * tell user application that palette has changed from previous frame.\
606 * - encoding: ??? (no palette-enabled encoder yet)\
607 * - decoding: set by lavc (default 0)\
608 */\
609 int palette_has_changed;\
610 \
611 /**\
612 * Codec suggestion on buffer type if != 0\
613 * - encoding: unused\
614 * - decoding: set by lavc (before get_buffer() call))\
615 */\
616 int buffer_hints;\
617 \
618 /**\
619 * DCT coeffitients\
620 * - encoding: unused\
621 * - decoding: set by lavc\
622 */\
623 short *dct_coeff;\
624 \
625 /**\
626 * Motion referece frame index\
627 * - encoding: set by user\
628 * - decoding: set by lavc\
629 */\
630 int8_t *ref_index[2];
631
632 #define FF_QSCALE_TYPE_MPEG1 0
633 #define FF_QSCALE_TYPE_MPEG2 1
634 #define FF_QSCALE_TYPE_H264 2
635
636 #define FF_BUFFER_TYPE_INTERNAL 1
637 #define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
638 #define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewhere else, don't dealloc image (data/base), all other tables are not shared
639 #define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, don't dealloc anything
640
641
642 #define FF_I_TYPE 1 // Intra
643 #define FF_P_TYPE 2 // Predicted
644 #define FF_B_TYPE 3 // Bi-dir predicted
645 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
646 #define FF_SI_TYPE 5
647 #define FF_SP_TYPE 6
648
649 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore)
650 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
651 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
652 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
653
654 /**
655 * Audio Video Frame.
656 */
657 typedef struct AVFrame {
658 FF_COMMON_FRAME
659 } AVFrame;
660
661 #define DEFAULT_FRAME_RATE_BASE 1001000
662
663 /**
664 * main external api structure.
665 */
666 typedef struct AVCodecContext {
667 /**
668 * Info on struct for av_log
669 * - set by avcodec_alloc_context
670 */
671 AVClass *av_class;
672 /**
673 * the average bitrate.
674 * - encoding: set by user. unused for constant quantizer encoding
675 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
676 */
677 int bit_rate;
678
679 /**
680 * number of bits the bitstream is allowed to diverge from the reference.
681 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
682 * - encoding: set by user. unused for constant quantizer encoding
683 * - decoding: unused
684 */
685 int bit_rate_tolerance;
686
687 /**
688 * CODEC_FLAG_*.
689 * - encoding: set by user.
690 * - decoding: set by user.
691 */
692 int flags;
693
694 /**
695 * some codecs needs additionnal format info. It is stored here
696 * - encoding: set by user.
697 * - decoding: set by lavc. (FIXME is this ok?)
698 */
699 int sub_id;
700
701 /**
702 * motion estimation algorithm used for video coding.
703 * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
704 * 8 (umh), 9 (iter) [7, 8 are x264 specific, 9 is snow specific]
705 * - encoding: MUST be set by user.
706 * - decoding: unused
707 */
708 int me_method;
709
710 /**
711 * some codecs need / can use extra-data like huffman tables.
712 * mjpeg: huffman tables
713 * rv10: additional flags
714 * mpeg4: global headers (they can be in the bitstream or here)
715 * the allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
716 * then extradata_size to avoid prolems if its read with the bitstream reader
717 * the bytewise contents of extradata must not depend on the architecture or cpu endianness
718 * - encoding: set/allocated/freed by lavc.
719 * - decoding: set/allocated/freed by user.
720 */
721 void *extradata;
722 int extradata_size;
723
724 /**
725 * this is the fundamental unit of time (in seconds) in terms
726 * of which frame timestamps are represented. for fixed-fps content,
727 * timebase should be 1/framerate and timestamp increments should be
728 * identically 1.
729 * - encoding: MUST be set by user
730 * - decoding: set by lavc.
731 */
732 AVRational time_base;
733
734 /* video only */
735 /**
736 * picture width / height.
737 * - encoding: MUST be set by user.
738 * - decoding: set by lavc.
739 * Note, for compatibility its possible to set this instead of
740 * coded_width/height before decoding
741 */
742 int width, height;
743
744 #define FF_ASPECT_EXTENDED 15
745
746 /**
747 * the number of pictures in a group of pitures, or 0 for intra_only.
748 * - encoding: set by user.
749 * - decoding: unused
750 */
751 int gop_size;
752
753 /**
754 * pixel format, see PIX_FMT_xxx.
755 * - encoding: set by user.
756 * - decoding: set by lavc.
757 */
758 enum PixelFormat pix_fmt;
759
760 /**
761 * Frame rate emulation. If not zero lower layer (i.e. format handler)
762 * has to read frames at native frame rate.
763 * - encoding: set by user.
764 * - decoding: unused.
765 */
766 int rate_emu;
767
768 /**
769 * if non NULL, 'draw_horiz_band' is called by the libavcodec
770 * decoder to draw an horizontal band. It improve cache usage. Not
771 * all codecs can do that. You must check the codec capabilities
772 * before
773 * - encoding: unused
774 * - decoding: set by user.
775 * @param height the height of the slice
776 * @param y the y position of the slice
777 * @param type 1->top field, 2->bottom field, 3->frame
778 * @param offset offset into the AVFrame.data from which the slice should be read
779 */
780 void (*draw_horiz_band)(struct AVCodecContext *s,
781 const AVFrame *src, int offset[4],
782 int y, int type, int height);
783
784 /* audio only */
785 int sample_rate; ///< samples per sec
786 int channels;
787
788 /**
789 * audio sample format.
790 * - encoding: set by user.
791 * - decoding: set by lavc.
792 */
793 enum SampleFormat sample_fmt; ///< sample format, currenly unused
794
795 /* the following data should not be initialized */
796 /**
797 * samples per packet. initialized when calling 'init'
798 */
799 int frame_size;
800 int frame_number; ///< audio or video frame number
801 int real_pict_num; ///< returns the real picture number of previous encoded frame
802
803 /**
804 * number of frames the decoded output will be delayed relative to
805 * the encoded input.
806 * - encoding: set by lavc.
807 * - decoding: unused
808 */
809 int delay;
810
811 /* - encoding parameters */
812 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
813 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
814
815 /**
816 * minimum quantizer.
817 * - encoding: set by user.
818 * - decoding: unused
819 */
820 int qmin;
821
822 /**
823 * maximum quantizer.
824 * - encoding: set by user.
825 * - decoding: unused
826 */
827 int qmax;
828
829 /**
830 * maximum quantizer difference etween frames.
831 * - encoding: set by user.
832 * - decoding: unused
833 */
834 int max_qdiff;
835
836 /**
837 * maximum number of b frames between non b frames.
838 * note: the output will be delayed by max_b_frames+1 relative to the input
839 * - encoding: set by user.
840 * - decoding: unused
841 */
842 int max_b_frames;
843
844 /**
845 * qscale factor between ip and b frames.
846 * - encoding: set by user.
847 * - decoding: unused
848 */
849 float b_quant_factor;
850
851 /** obsolete FIXME remove */
852 int rc_strategy;
853 #define FF_RC_STRATEGY_XVID 1
854
855 int b_frame_strategy;
856
857 /**
858 * hurry up amount.
859 * deprecated in favor of skip_idct and skip_frame
860 * - encoding: unused
861 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
862 */
863 int hurry_up;
864
865 struct AVCodec *codec;
866
867 void *priv_data;
868
869 /* unused, FIXME remove*/
870 int rtp_mode;
871
872 int rtp_payload_size; /* The size of the RTP payload: the coder will */
873 /* do it's best to deliver a chunk with size */
874 /* below rtp_payload_size, the chunk will start */
875 /* with a start code on some codecs like H.263 */
876 /* This doesn't take account of any particular */
877 /* headers inside the transmited RTP payload */
878
879
880 /* The RTP callback: This function is called */
881 /* every time the encoder has a packet to send */
882 /* Depends on the encoder if the data starts */
883 /* with a Start Code (it should) H.263 does. */
884 /* mb_nb contains the number of macroblocks */
885 /* encoded in the RTP payload */
886 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
887
888 /* statistics, used for 2-pass encoding */
889 int mv_bits;
890 int header_bits;
891 int i_tex_bits;
892 int p_tex_bits;
893 int i_count;
894 int p_count;
895 int skip_count;
896 int misc_bits;
897
898 /**
899 * number of bits used for the previously encoded frame.
900 * - encoding: set by lavc
901 * - decoding: unused
902 */
903 int frame_bits;
904
905 /**
906 * private data of the user, can be used to carry app specific stuff.
907 * - encoding: set by user
908 * - decoding: set by user
909 */
910 void *opaque;
911
912 char codec_name[32];
913 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
914 enum CodecID codec_id; /* see CODEC_ID_xxx */
915
916 /**
917 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
918 * this is used to workaround some encoder bugs
919 * - encoding: set by user, if not then the default based on codec_id will be used
920 * - decoding: set by user, will be converted to upper case by lavc during init
921 */
922 unsigned int codec_tag;
923
924 /**
925 * workaround bugs in encoders which sometimes cannot be detected automatically.
926 * - encoding: set by user
927 * - decoding: set by user
928 */
929 int workaround_bugs;
930 #define FF_BUG_AUTODETECT 1 ///< autodetection
931 #define FF_BUG_OLD_MSMPEG4 2
932 #define FF_BUG_XVID_ILACE 4
933 #define FF_BUG_UMP4 8
934 #define FF_BUG_NO_PADDING 16
935 #define FF_BUG_AMV 32
936 #define FF_BUG_AC_VLC 0 ///< will be removed, libavcodec can now handle these non compliant files by default
937 #define FF_BUG_QPEL_CHROMA 64
938 #define FF_BUG_STD_QPEL 128
939 #define FF_BUG_QPEL_CHROMA2 256
940 #define FF_BUG_DIRECT_BLOCKSIZE 512
941 #define FF_BUG_EDGE 1024
942 #define FF_BUG_HPEL_CHROMA 2048
943 #define FF_BUG_DC_CLIP 4096
944 #define FF_BUG_MS 8192 ///< workaround various bugs in microsofts broken decoders
945 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
946
947 /**
948 * luma single coeff elimination threshold.
949 * - encoding: set by user
950 * - decoding: unused
951 */
952 int luma_elim_threshold;
953
954 /**
955 * chroma single coeff elimination threshold.
956 * - encoding: set by user
957 * - decoding: unused
958 */
959 int chroma_elim_threshold;
960
961 /**
962 * strictly follow the std (MPEG4, ...).
963 * - encoding: set by user
964 * - decoding: unused
965 */
966 int strict_std_compliance;
967 #define FF_COMPLIANCE_VERY_STRICT 2 ///< strictly conform to a older more strict version of the spec or reference software
968 #define FF_COMPLIANCE_STRICT 1 ///< strictly conform to all the things in the spec no matter what consequences
969 #define FF_COMPLIANCE_NORMAL 0
970 #define FF_COMPLIANCE_INOFFICIAL -1 ///< allow inofficial extensions
971 #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< allow non standarized experimental things
972
973 /**
974 * qscale offset between ip and b frames.
975 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
976 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
977 * - encoding: set by user.
978 * - decoding: unused
979 */
980 float b_quant_offset;
981
982 /**
983 * error resilience higher values will detect more errors but may missdetect
984 * some more or less valid parts as errors.
985 * - encoding: unused
986 * - decoding: set by user
987 */
988 int error_resilience;
989 #define FF_ER_CAREFUL 1
990 #define FF_ER_COMPLIANT 2
991 #define FF_ER_AGGRESSIVE 3
992 #define FF_ER_VERY_AGGRESSIVE 4
993
994 /**
995 * called at the beginning of each frame to get a buffer for it.
996 * if pic.reference is set then the frame will be read later by lavc
997 * avcodec_align_dimensions() should be used to find the required width and
998 * height, as they normally need to be rounded up to the next multiple of 16
999 * - encoding: unused
1000 * - decoding: set by lavc, user can override
1001 */
1002 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1003
1004 /**
1005 * called to release buffers which where allocated with get_buffer.
1006 * a released buffer can be reused in get_buffer()
1007 * pic.data[*] must be set to NULL
1008 * - encoding: unused
1009 * - decoding: set by lavc, user can override
1010 */
1011 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1012
1013 /**
1014 * if 1 the stream has a 1 frame delay during decoding.
1015 * - encoding: set by lavc
1016 * - decoding: set by lavc
1017 */
1018 int has_b_frames;
1019
1020 /**
1021 * number of bytes per packet if constant and known or 0
1022 * used by some WAV based audio codecs
1023 */
1024 int block_align;
1025
1026 int parse_only; /* - decoding only: if true, only parsing is done
1027 (function avcodec_parse_frame()). The frame
1028 data is returned. Only MPEG codecs support this now. */
1029
1030 /**
1031 * 0-> h263 quant 1-> mpeg quant.
1032 * - encoding: set by user.
1033 * - decoding: unused
1034 */
1035 int mpeg_quant;
1036
1037 /**
1038 * pass1 encoding statistics output buffer.
1039 * - encoding: set by lavc
1040 * - decoding: unused
1041 */
1042 char *stats_out;
1043
1044 /**
1045 * pass2 encoding statistics input buffer.
1046 * concatenated stuff from stats_out of pass1 should be placed here
1047 * - encoding: allocated/set/freed by user
1048 * - decoding: unused
1049 */
1050 char *stats_in;
1051
1052 /**
1053 * ratecontrol qmin qmax limiting method.
1054 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
1055 * - encoding: set by user.
1056 * - decoding: unused
1057 */
1058 float rc_qsquish;
1059
1060 float rc_qmod_amp;
1061 int rc_qmod_freq;
1062
1063 /**
1064 * ratecontrol override, see RcOverride.
1065 * - encoding: allocated/set/freed by user.
1066 * - decoding: unused
1067 */
1068 RcOverride *rc_override;
1069 int rc_override_count;
1070
1071 /**
1072 * rate control equation.
1073 * - encoding: set by user
1074 * - decoding: unused
1075 */
1076 char *rc_eq;
1077
1078 /**
1079 * maximum bitrate.
1080 * - encoding: set by user.
1081 * - decoding: unused
1082 */
1083 int rc_max_rate;
1084
1085 /**
1086 * minimum bitrate.
1087 * - encoding: set by user.
1088 * - decoding: unused
1089 */
1090 int rc_min_rate;
1091
1092 /**
1093 * decoder bitstream buffer size.
1094 * - encoding: set by user.
1095 * - decoding: unused
1096 */
1097 int rc_buffer_size;
1098 float rc_buffer_aggressivity;
1099
1100 /**
1101 * qscale factor between p and i frames.
1102 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1103 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1104 * - encoding: set by user.
1105 * - decoding: unused
1106 */
1107 float i_quant_factor;
1108
1109 /**
1110 * qscale offset between p and i frames.
1111 * - encoding: set by user.
1112 * - decoding: unused
1113 */
1114 float i_quant_offset;
1115
1116 /**
1117 * initial complexity for pass1 ratecontrol.
1118 * - encoding: set by user.
1119 * - decoding: unused
1120 */
1121 float rc_initial_cplx;
1122
1123 /**
1124 * dct algorithm, see FF_DCT_* below.
1125 * - encoding: set by user
1126 * - decoding: unused
1127 */
1128 int dct_algo;
1129 #define FF_DCT_AUTO 0
1130 #define FF_DCT_FASTINT 1
1131 #define FF_DCT_INT 2
1132 #define FF_DCT_MMX 3
1133 #define FF_DCT_MLIB 4
1134 #define FF_DCT_ALTIVEC 5
1135 #define FF_DCT_FAAN 6
1136
1137 /**
1138 * luminance masking (0-> disabled).
1139 * - encoding: set by user
1140 * - decoding: unused
1141 */
1142 float lumi_masking;
1143
1144 /**
1145 * temporary complexity masking (0-> disabled).
1146 * - encoding: set by user
1147 * - decoding: unused
1148 */
1149 float temporal_cplx_masking;
1150
1151 /**
1152 * spatial complexity masking (0-> disabled).
1153 * - encoding: set by user
1154 * - decoding: unused
1155 */
1156 float spatial_cplx_masking;
1157
1158 /**
1159 * p block masking (0-> disabled).
1160 * - encoding: set by user
1161 * - decoding: unused
1162 */
1163 float p_masking;
1164
1165 /**
1166 * darkness masking (0-> disabled).
1167 * - encoding: set by user
1168 * - decoding: unused
1169 */
1170 float dark_masking;
1171
1172
1173 /* for binary compatibility */
1174 int unused;
1175
1176 /**
1177 * idct algorithm, see FF_IDCT_* below.
1178 * - encoding: set by user
1179 * - decoding: set by user
1180 */
1181 int idct_algo;
1182 #define FF_IDCT_AUTO 0
1183 #define FF_IDCT_INT 1
1184 #define FF_IDCT_SIMPLE 2
1185 #define FF_IDCT_SIMPLEMMX 3
1186 #define FF_IDCT_LIBMPEG2MMX 4
1187 #define FF_IDCT_PS2 5
1188 #define FF_IDCT_MLIB 6
1189 #define FF_IDCT_ARM 7
1190 #define FF_IDCT_ALTIVEC 8
1191 #define FF_IDCT_SH4 9
1192 #define FF_IDCT_SIMPLEARM 10
1193 #define FF_IDCT_H264 11
1194 #define FF_IDCT_VP3 12
1195 #define FF_IDCT_IPP 13
1196 #define FF_IDCT_XVIDMMX 14
1197 #define FF_IDCT_CAVS 15
1198
1199 /**
1200 * slice count.
1201 * - encoding: set by lavc
1202 * - decoding: set by user (or 0)
1203 */
1204 int slice_count;
1205 /**
1206 * slice offsets in the frame in bytes.
1207 * - encoding: set/allocated by lavc
1208 * - decoding: set/allocated by user (or NULL)
1209 */
1210 int *slice_offset;
1211
1212 /**
1213 * error concealment flags.
1214 * - encoding: unused
1215 * - decoding: set by user
1216 */
1217 int error_concealment;
1218 #define FF_EC_GUESS_MVS 1
1219 #define FF_EC_DEBLOCK 2
1220
1221 /**
1222 * dsp_mask could be add used to disable unwanted CPU features
1223 * CPU features (i.e. MMX, SSE. ...)
1224 *
1225 * with FORCE flag you may instead enable given CPU features
1226 * (Dangerous: usable in case of misdetection, improper usage however will
1227 * result into program crash)
1228 */
1229 unsigned dsp_mask;
1230 #define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
1231 /* lower 16 bits - CPU features */
1232 #ifdef HAVE_MMX
1233 #define FF_MM_MMX 0x0001 /* standard MMX */
1234 #define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
1235 #define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
1236 #define FF_MM_SSE 0x0008 /* SSE functions */
1237 #define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
1238 #define FF_MM_3DNOWEXT 0x0020 /* AMD 3DNowExt */
1239 #endif /* HAVE_MMX */
1240 #ifdef HAVE_IWMMXT
1241 #define FF_MM_IWMMXT 0x0100 /* XScale IWMMXT */
1242 #endif /* HAVE_IWMMXT */
1243
1244 /**
1245 * bits per sample/pixel from the demuxer (needed for huffyuv).
1246 * - encoding: set by lavc
1247 * - decoding: set by user
1248 */
1249 int bits_per_sample;
1250
1251 /**
1252 * prediction method (needed for huffyuv).
1253 * - encoding: set by user
1254 * - decoding: unused
1255 */
1256 int prediction_method;
1257 #define FF_PRED_LEFT 0
1258 #define FF_PRED_PLANE 1
1259 #define FF_PRED_MEDIAN 2
1260
1261 /**
1262 * sample aspect ratio (0 if unknown).
1263 * numerator and denominator must be relative prime and smaller then 256 for some video standards
1264 * - encoding: set by user.
1265 * - decoding: set by lavc.
1266 */
1267 AVRational sample_aspect_ratio;
1268
1269 /**
1270 * the picture in the bitstream.
1271 * - encoding: set by lavc
1272 * - decoding: set by lavc
1273 */
1274 AVFrame *coded_frame;
1275
1276 /**
1277 * debug.
1278 * - encoding: set by user.
1279 * - decoding: set by user.
1280 */
1281 int debug;
1282 #define FF_DEBUG_PICT_INFO 1
1283 #define FF_DEBUG_RC 2
1284 #define FF_DEBUG_BITSTREAM 4
1285 #define FF_DEBUG_MB_TYPE 8
1286 #define FF_DEBUG_QP 16
1287 #define FF_DEBUG_MV 32
1288 #define FF_DEBUG_DCT_COEFF 0x00000040
1289 #define FF_DEBUG_SKIP 0x00000080
1290 #define FF_DEBUG_STARTCODE 0x00000100
1291 #define FF_DEBUG_PTS 0x00000200
1292 #define FF_DEBUG_ER 0x00000400
1293 #define FF_DEBUG_MMCO 0x00000800
1294 #define FF_DEBUG_BUGS 0x00001000
1295 #define FF_DEBUG_VIS_QP 0x00002000
1296 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1297
1298 /**
1299 * debug.
1300 * - encoding: set by user.
1301 * - decoding: set by user.
1302 */
1303 int debug_mv;
1304 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1305 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1306 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1307
1308 /**
1309 * error.
1310 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1311 * - decoding: unused
1312 */
1313 uint64_t error[4];
1314
1315 /**
1316 * minimum MB quantizer.
1317 * - encoding: unused
1318 * - decoding: unused
1319 */
1320 int mb_qmin;
1321
1322 /**
1323 * maximum MB quantizer.
1324 * - encoding: unused
1325 * - decoding: unused
1326 */
1327 int mb_qmax;
1328
1329 /**
1330 * motion estimation compare function.
1331 * - encoding: set by user.
1332 * - decoding: unused
1333 */
1334 int me_cmp;
1335 /**
1336 * subpixel motion estimation compare function.
1337 * - encoding: set by user.
1338 * - decoding: unused
1339 */
1340 int me_sub_cmp;
1341 /**
1342 * macroblock compare function (not supported yet).
1343 * - encoding: set by user.
1344 * - decoding: unused
1345 */
1346 int mb_cmp;
1347 /**
1348 * interlaced dct compare function
1349 * - encoding: set by user.
1350 * - decoding: unused
1351 */
1352 int ildct_cmp;
1353 #define FF_CMP_SAD 0
1354 #define FF_CMP_SSE 1
1355 #define FF_CMP_SATD 2
1356 #define FF_CMP_DCT 3
1357 #define FF_CMP_PSNR 4
1358 #define FF_CMP_BIT 5
1359 #define FF_CMP_RD 6
1360 #define FF_CMP_ZERO 7
1361 #define FF_CMP_VSAD 8
1362 #define FF_CMP_VSSE 9
1363 #define FF_CMP_NSSE 10
1364 #define FF_CMP_W53 11
1365 #define FF_CMP_W97 12
1366 #define FF_CMP_DCTMAX 13
1367 #define FF_CMP_DCT264 14
1368 #define FF_CMP_CHROMA 256
1369
1370 /**
1371 * ME diamond size & shape.
1372 * - encoding: set by user.
1373 * - decoding: unused
1374 */
1375 int dia_size;
1376
1377 /**
1378 * amount of previous MV predictors (2a+1 x 2a+1 square).
1379 * - encoding: set by user.
1380 * - decoding: unused
1381 */
1382 int last_predictor_count;
1383
1384 /**
1385 * pre pass for motion estimation.
1386 * - encoding: set by user.
1387 * - decoding: unused
1388 */
1389 int pre_me;
1390
1391 /**
1392 * motion estimation pre pass compare function.
1393 * - encoding: set by user.
1394 * - decoding: unused
1395 */
1396 int me_pre_cmp;
1397
1398 /**
1399 * ME pre pass diamond size & shape.
1400 * - encoding: set by user.
1401 * - decoding: unused
1402 */
1403 int pre_dia_size;
1404
1405 /**
1406 * subpel ME quality.
1407 * - encoding: set by user.
1408 * - decoding: unused
1409 */
1410 int me_subpel_quality;
1411
1412 /**
1413 * callback to negotiate the pixelFormat.
1414 * @param fmt is the list of formats which are supported by the codec,
1415 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1416 * the first is allways the native one
1417 * @return the choosen format
1418 * - encoding: unused
1419 * - decoding: set by user, if not set then the native format will always be choosen
1420 */
1421 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1422
1423 /**
1424 * DTG active format information (additionnal aspect ratio
1425 * information only used in DVB MPEG2 transport streams). 0 if
1426 * not set.
1427 *
1428 * - encoding: unused.
1429 * - decoding: set by decoder
1430 */
1431 int dtg_active_format;
1432 #define FF_DTG_AFD_SAME 8
1433 #define FF_DTG_AFD_4_3 9
1434 #define FF_DTG_AFD_16_9 10
1435 #define FF_DTG_AFD_14_9 11
1436 #define FF_DTG_AFD_4_3_SP_14_9 13
1437 #define FF_DTG_AFD_16_9_SP_14_9 14
1438 #define FF_DTG_AFD_SP_4_3 15
1439
1440 /**
1441 * Maximum motion estimation search range in subpel units.
1442 * if 0 then no limit
1443 *
1444 * - encoding: set by user.
1445 * - decoding: unused.
1446 */
1447 int me_range;
1448
1449 /**
1450 * intra quantizer bias.
1451 * - encoding: set by user.
1452 * - decoding: unused
1453 */
1454 int intra_quant_bias;
1455 #define FF_DEFAULT_QUANT_BIAS 999999
1456
1457 /**
1458 * inter quantizer bias.
1459 * - encoding: set by user.
1460 * - decoding: unused
1461 */
1462 int inter_quant_bias;
1463
1464 /**
1465 * color table ID.
1466 * - encoding: unused.
1467 * - decoding: which clrtable should be used for 8bit RGB images
1468 * table have to be stored somewhere FIXME
1469 */
1470 int color_table_id;
1471
1472 /**
1473 * internal_buffer count.
1474 * Don't touch, used by lavc default_get_buffer()
1475 */
1476 int internal_buffer_count;
1477
1478 /**
1479 * internal_buffers.
1480 * Don't touch, used by lavc default_get_buffer()
1481 */
1482 void *internal_buffer;
1483
1484 #define FF_LAMBDA_SHIFT 7
1485 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1486 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1487 #define FF_LAMBDA_MAX (256*128-1)
1488
1489 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1490 /**
1491 * global quality for codecs which cannot change it per frame.
1492 * this should be proportional to MPEG1/2/4 qscale.
1493 * - encoding: set by user.
1494 * - decoding: unused
1495 */
1496 int global_quality;
1497
1498 #define FF_CODER_TYPE_VLC 0
1499 #define FF_CODER_TYPE_AC 1
1500 /**
1501 * coder type
1502 * - encoding: set by user.
1503 * - decoding: unused
1504 */
1505 int coder_type;
1506
1507 /**
1508 * context model
1509 * - encoding: set by user.
1510 * - decoding: unused
1511 */
1512 int context_model;
1513 #if 0
1514 /**
1515 *
1516 * - encoding: unused
1517 * - decoding: set by user.
1518 */
1519 uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1520 #endif
1521
1522 /**
1523 * slice flags
1524 * - encoding: unused
1525 * - decoding: set by user.
1526 */
1527 int slice_flags;
1528 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1529 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1530 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1531
1532 /**
1533 * XVideo Motion Acceleration
1534 * - encoding: forbidden
1535 * - decoding: set by decoder
1536 */
1537 int xvmc_acceleration;
1538
1539 /**
1540 * macroblock decision mode
1541 * - encoding: set by user.
1542 * - decoding: unused
1543 */
1544 int mb_decision;
1545 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1546 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1547 #define FF_MB_DECISION_RD 2 ///< rate distoration
1548
1549 /**
1550 * custom intra quantization matrix
1551 * - encoding: set by user, can be NULL
1552 * - decoding: set by lavc
1553 */
1554 uint16_t *intra_matrix;
1555
1556 /**
1557 * custom inter quantization matrix
1558 * - encoding: set by user, can be NULL
1559 * - decoding: set by lavc
1560 */
1561 uint16_t *inter_matrix;
1562
1563 /**
1564 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1565 * this is used to workaround some encoder bugs
1566 * - encoding: unused
1567 * - decoding: set by user, will be converted to upper case by lavc during init
1568 */
1569 unsigned int stream_codec_tag;
1570
1571 /**
1572 * scene change detection threshold.
1573 * 0 is default, larger means fewer detected scene changes
1574 * - encoding: set by user.
1575 * - decoding: unused
1576 */
1577 int scenechange_threshold;
1578
1579 /**
1580 * minimum lagrange multipler
1581 * - encoding: set by user.
1582 * - decoding: unused
1583 */
1584 int lmin;
1585
1586 /**
1587 * maximum lagrange multipler
1588 * - encoding: set by user.
1589 * - decoding: unused
1590 */
1591 int lmax;
1592
1593 /**
1594 * Palette control structure
1595 * - encoding: ??? (no palette-enabled encoder yet)
1596 * - decoding: set by user.
1597 */
1598 struct AVPaletteControl *palctrl;
1599
1600 /**
1601 * noise reduction strength
1602 * - encoding: set by user.
1603 * - decoding: unused
1604 */
1605 int noise_reduction;
1606
1607 /**
1608 * called at the beginning of a frame to get cr buffer for it.
1609 * buffer type (size, hints) must be the same. lavc won't check it.
1610 * lavc will pass previous buffer in pic, function should return
1611 * same buffer or new buffer with old frame "painted" into it.
1612 * if pic.data[0] == NULL must behave like get_buffer().
1613 * - encoding: unused
1614 * - decoding: set by lavc, user can override
1615 */
1616 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1617
1618 /**
1619 * number of bits which should be loaded into the rc buffer before decoding starts
1620 * - encoding: set by user.
1621 * - decoding: unused
1622 */
1623 int rc_initial_buffer_occupancy;
1624
1625 /**
1626 *
1627 * - encoding: set by user.
1628 * - decoding: unused
1629 */
1630 int inter_threshold;
1631
1632 /**
1633 * CODEC_FLAG2_*.
1634 * - encoding: set by user.
1635 * - decoding: set by user.
1636 */
1637 int flags2;
1638
1639 /**
1640 * simulates errors in the bitstream to test error concealment.
1641 * - encoding: set by user.
1642 * - decoding: unused.
1643 */
1644 int error_rate;
1645
1646 /**
1647 * MP3 antialias algorithm, see FF_AA_* below.
1648 * - encoding: unused
1649 * - decoding: set by user
1650 */
1651 int antialias_algo;
1652 #define FF_AA_AUTO 0
1653 #define FF_AA_FASTINT 1 //not implemented yet
1654 #define FF_AA_INT 2
1655 #define FF_AA_FLOAT 3
1656 /**
1657 * Quantizer noise shaping.
1658 * - encoding: set by user
1659 * - decoding: unused
1660 */
1661 int quantizer_noise_shaping;
1662
1663 /**
1664 * Thread count.
1665 * is used to decide how many independant tasks should be passed to execute()
1666 * - encoding: set by user
1667 * - decoding: set by user
1668 */
1669 int thread_count;
1670
1671 /**
1672 * the codec may call this to execute several independant things. it will return only after
1673 * finishing all tasks, the user may replace this with some multithreaded implementation, the
1674 * default implementation will execute the parts serially
1675 * @param count the number of things to execute
1676 * - encoding: set by lavc, user can override
1677 * - decoding: set by lavc, user can override
1678 */
1679 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1680
1681 /**
1682 * Thread opaque.
1683 * can be used by execute() to store some per AVCodecContext stuff.
1684 * - encoding: set by execute()
1685 * - decoding: set by execute()
1686 */
1687 void *thread_opaque;
1688
1689 /**
1690 * Motion estimation threshold. under which no motion estimation is
1691 * performed, but instead the user specified motion vectors are used
1692 *
1693 * - encoding: set by user
1694 * - decoding: unused
1695 */
1696 int me_threshold;
1697
1698 /**
1699 * Macroblock threshold. under which the user specified macroblock types will be used
1700 * - encoding: set by user
1701 * - decoding: unused
1702 */
1703 int mb_threshold;
1704
1705 /**
1706 * precision of the intra dc coefficient - 8.
1707 * - encoding: set by user
1708 * - decoding: unused
1709 */
1710 int intra_dc_precision;
1711
1712 /**
1713 * noise vs. sse weight for the nsse comparsion function.
1714 * - encoding: set by user
1715 * - decoding: unused
1716 */
1717 int nsse_weight;
1718
1719 /**
1720 * number of macroblock rows at the top which are skipped.
1721 * - encoding: unused
1722 * - decoding: set by user
1723 */
1724 int skip_top;
1725
1726 /**
1727 * number of macroblock rows at the bottom which are skipped.
1728 * - encoding: unused
1729 * - decoding: set by user
1730 */
1731 int skip_bottom;
1732
1733 /**
1734 * profile
1735 * - encoding: set by user
1736 * - decoding: set by lavc
1737 */
1738 int profile;
1739 #define FF_PROFILE_UNKNOWN -99
1740
1741 /**
1742 * level
1743 * - encoding: set by user
1744 * - decoding: set by lavc
1745 */
1746 int level;
1747 #define FF_LEVEL_UNKNOWN -99
1748
1749 /**
1750 * low resolution decoding. 1-> 1/2 size, 2->1/4 size
1751 * - encoding: unused
1752 * - decoding: set by user
1753 */
1754 int lowres;
1755
1756 /**
1757 * bitsream width / height. may be different from width/height if lowres
1758 * or other things are used
1759 * - encoding: unused
1760 * - decoding: set by user before init if known, codec should override / dynamically change if needed
1761 */
1762 int coded_width, coded_height;
1763
1764 /**
1765 * frame skip threshold
1766 * - encoding: set by user
1767 * - decoding: unused
1768 */
1769 int frame_skip_threshold;
1770
1771 /**
1772 * frame skip factor
1773 * - encoding: set by user
1774 * - decoding: unused
1775 */
1776 int frame_skip_factor;
1777
1778 /**
1779 * frame skip exponent
1780 * - encoding: set by user
1781 * - decoding: unused
1782 */
1783 int frame_skip_exp;
1784
1785 /**
1786 * frame skip comparission function
1787 * - encoding: set by user.
1788 * - decoding: unused
1789 */
1790 int frame_skip_cmp;
1791
1792 /**
1793 * border processing masking. raises the quantizer for mbs on the borders
1794 * of the picture.
1795 * - encoding: set by user
1796 * - decoding: unused
1797 */
1798 float border_masking;
1799
1800 /**
1801 * minimum MB lagrange multipler.
1802 * - encoding: set by user.
1803 * - decoding: unused
1804 */
1805 int mb_lmin;
1806
1807 /**
1808 * maximum MB lagrange multipler.
1809 * - encoding: set by user.
1810 * - decoding: unused
1811 */
1812 int mb_lmax;
1813
1814 /**
1815 *
1816 * - encoding: set by user.
1817 * - decoding: unused
1818 */
1819 int me_penalty_compensation;
1820
1821 /**
1822 *
1823 * - encoding: unused
1824 * - decoding: set by user.
1825 */
1826 enum AVDiscard skip_loop_filter;
1827
1828 /**
1829 *
1830 * - encoding: unused
1831 * - decoding: set by user.
1832 */
1833 enum AVDiscard skip_idct;
1834
1835 /**
1836 *
1837 * - encoding: unused
1838 * - decoding: set by user.
1839 */
1840 enum AVDiscard skip_frame;
1841
1842 /**
1843 *
1844 * - encoding: set by user.
1845 * - decoding: unused
1846 */
1847 int bidir_refine;
1848
1849 /**
1850 *
1851 * - encoding: set by user.
1852 * - decoding: unused
1853 */
1854 int brd_scale;
1855
1856 /**
1857 * constant rate factor - quality-based VBR - values ~correspond to qps
1858 * - encoding: set by user.
1859 * - decoding: unused
1860 */
1861 int crf;
1862
1863 /**
1864 * constant quantization parameter rate control method
1865 * - encoding: set by user.
1866 * - decoding: unused
1867 */
1868 int cqp;
1869
1870 /**
1871 * minimum gop size
1872 * - encoding: set by user.
1873 * - decoding: unused
1874 */
1875 int keyint_min;
1876
1877 /**
1878 * number of reference frames
1879 * - encoding: set by user.
1880 * - decoding: unused
1881 */
1882 int refs;
1883
1884 /**
1885 * chroma qp offset from luma
1886 * - encoding: set by user.
1887 * - decoding: unused
1888 */
1889 int chromaoffset;
1890
1891 /**
1892 * influences how often b-frames are used
1893 * - encoding: set by user.
1894 * - decoding: unused
1895 */
1896 int bframebias;
1897
1898 /**
1899 * trellis RD quantization
1900 * - encoding: set by user.
1901 * - decoding: unused
1902 */
1903 int trellis;
1904
1905 /**
1906 * reduce fluctuations in qp (before curve compression)
1907 * - encoding: set by user.
1908 * - decoding: unused
1909 */
1910 float complexityblur;
1911
1912 /**
1913 * in-loop deblocking filter alphac0 parameter
1914 * alpha is in the range -6...6
1915 * - encoding: set by user.
1916 * - decoding: unused
1917 */
1918 int deblockalpha;
1919
1920 /**
1921 * in-loop deblocking filter beta parameter
1922 * beta is in the range -6...6
1923 * - encoding: set by user.
1924 * - decoding: unused
1925 */
1926 int deblockbeta;
1927
1928 /**
1929 * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
1930 * - encoding: set by user.
1931 * - decoding: unused
1932 */
1933 int partitions;
1934 #define X264_PART_I4X4 0x001 /* Analyse i4x4 */
1935 #define X264_PART_I8X8 0x002 /* Analyse i8x8 (requires 8x8 transform) */
1936 #define X264_PART_P8X8 0x010 /* Analyse p16x8, p8x16 and p8x8 */
1937 #define X264_PART_P4X4 0x020 /* Analyse p8x4, p4x8, p4x4 */
1938 #define X264_PART_B8X8 0x100 /* Analyse b16x8, b8x16 and b8x8 */
1939
1940 /**
1941 * direct mv prediction mode - 0 (none), 1 (spatial), 2 (temporal)
1942 * - encoding: set by user.
1943 * - decoding: unused
1944 */
1945 int directpred;
1946
1947 /**
1948 * audio cutoff bandwidth (0 means "automatic") . Currently used only by FAAC
1949 * - encoding: set by user.
1950 * - decoding: unused
1951 */
1952 int cutoff;
1953
1954 /**
1955 * multiplied by qscale for each frame and added to scene_change_score
1956 * - encoding: set by user.
1957 * - decoding: unused
1958 */
1959 int scenechange_factor;
1960
1961 /**
1962 *
1963 * note: value depends upon the compare functin used for fullpel ME
1964 * - encoding: set by user.
1965 * - decoding: unused
1966 */
1967 int mv0_threshold;
1968
1969 /**
1970 * adjusts sensitivity of b_frame_strategy 1
1971 * - encoding: set by user.
1972 * - decoding: unused
1973 */
1974 int b_sensitivity;
1975
1976 /**
1977 * - encoding: set by user.
1978 * - decoding: unused
1979 */
1980 int compression_level;
1981 #define FF_COMPRESSION_DEFAULT -1
1982
1983 /**
1984 * sets whether to use LPC mode - used by FLAC encoder
1985 * - encoding: set by user.
1986 * - decoding: unused.
1987 */
1988 int use_lpc;
1989
1990 /**
1991 * LPC coefficient precision - used by FLAC encoder
1992 * - encoding: set by user.
1993 * - decoding: unused.
1994 */
1995 int lpc_coeff_precision;
1996
1997 /**
1998 * - encoding: set by user.
1999 * - decoding: unused.
2000 */
2001 int min_prediction_order;
2002
2003 /**
2004 * - encoding: set by user.
2005 * - decoding: unused.
2006 */
2007 int max_prediction_order;
2008
2009 /**
2010 * search method for selecting prediction order
2011 * - encoding: set by user.
2012 * - decoding: unused.
2013 */
2014 int prediction_order_method;
2015
2016 /**
2017 * - encoding: set by user.
2018 * - decoding: unused.
2019 */
2020 int min_partition_order;
2021
2022 /**
2023 * - encoding: set by user.
2024 * - decoding: unused.
2025 */
2026 int max_partition_order;
2027 } AVCodecContext;
2028
2029 /**
2030 * AVCodec.
2031 */
2032 typedef struct AVCodec {
2033 const char *name;
2034 enum CodecType type;
2035 enum CodecID id;
2036 int priv_data_size;
2037 int (*init)(AVCodecContext *);
2038 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2039 int (*close)(AVCodecContext *);
2040 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
2041 uint8_t *buf, int buf_size);
2042 int capabilities;
2043 #if LIBAVCODEC_VERSION_INT < ((50<<16)+(0<<8)+0)
2044 void *dummy; // FIXME remove next time we break binary compatibility
2045 #endif
2046 struct AVCodec *next;
2047 void (*flush)(AVCodecContext *);
2048 const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
2049 const enum PixelFormat *pix_fmts; ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
2050 } AVCodec;
2051
2052 /**
2053 * four components are given, that's all.
2054 * the last component is alpha
2055 */
2056 typedef struct AVPicture {
2057 uint8_t *data[4];
2058 int linesize[4]; ///< number of bytes per line
2059 } AVPicture;
2060
2061 /**
2062 * AVPaletteControl
2063 * This structure defines a method for communicating palette changes
2064 * between and demuxer and a decoder.
2065 */
2066 #define AVPALETTE_SIZE 1024
2067 #define AVPALETTE_COUNT 256
2068 typedef struct AVPaletteControl {
2069
2070 /* demuxer sets this to 1 to indicate the palette has changed;
2071 * decoder resets to 0 */
2072 int palette_changed;
2073
2074 /* 4-byte ARGB palette entries, stored in native byte order; note that
2075 * the individual palette components should be on a 8-bit scale; if
2076 * the palette data comes from a IBM VGA native format, the component
2077 * data is probably 6 bits in size and needs to be scaled */
2078 unsigned int palette[AVPALETTE_COUNT];
2079
2080 } AVPaletteControl;
2081
2082 typedef struct AVSubtitleRect {
2083 uint16_t x;
2084 uint16_t y;
2085 uint16_t w;
2086 uint16_t h;
2087 uint16_t nb_colors;
2088 int linesize;
2089 uint32_t *rgba_palette;
2090 uint8_t *bitmap;
2091 } AVSubtitleRect;
2092
2093 typedef struct AVSubtitle {
2094 uint16_t format; /* 0 = graphics */
2095 uint32_t start_display_time; /* relative to packet pts, in ms */
2096 uint32_t end_display_time; /* relative to packet pts, in ms */
2097 uint32_t num_rects;
2098 AVSubtitleRect *rects;
2099 } AVSubtitle;
2100
2101 extern AVCodec ac3_encoder;
2102 extern AVCodec mp2_encoder;
2103 extern AVCodec mp3lame_encoder;
2104 extern AVCodec oggvorbis_encoder;
2105 extern AVCodec faac_encoder;
2106 extern AVCodec flac_encoder;
2107 extern AVCodec xvid_encoder;
2108 extern AVCodec mpeg1video_encoder;
2109 extern AVCodec mpeg2video_encoder;
2110 extern AVCodec h261_encoder;
2111 extern AVCodec h263_encoder;
2112 extern AVCodec h263p_encoder;
2113 extern AVCodec flv_encoder;
2114 extern AVCodec rv10_encoder;
2115 extern AVCodec rv20_encoder;
2116 extern AVCodec dvvideo_encoder;
2117 extern AVCodec mjpeg_encoder;
2118 extern AVCodec ljpeg_encoder;
2119 extern AVCodec jpegls_encoder;
2120 extern AVCodec png_encoder;
2121 extern AVCodec ppm_encoder;
2122 extern AVCodec pgm_encoder;
2123 extern AVCodec pgmyuv_encoder;
2124 extern AVCodec pbm_encoder;
2125 extern AVCodec pam_encoder;
2126 extern AVCodec mpeg4_encoder;
2127 extern AVCodec msmpeg4v1_encoder;
2128 extern AVCodec msmpeg4v2_encoder;
2129 extern AVCodec msmpeg4v3_encoder;
2130 extern AVCodec wmv1_encoder;
2131 extern AVCodec wmv2_encoder;
2132 extern AVCodec huffyuv_encoder;
2133 extern AVCodec ffvhuff_encoder;
2134 extern AVCodec h264_encoder;
2135 extern AVCodec asv1_encoder;
2136 extern AVCodec asv2_encoder;
2137 extern AVCodec vcr1_encoder;
2138 extern AVCodec ffv1_encoder;
2139 extern AVCodec snow_encoder;
2140 extern AVCodec mdec_encoder;
2141 extern AVCodec zlib_encoder;
2142 extern AVCodec sonic_encoder;
2143 extern AVCodec sonic_ls_encoder;
2144 extern AVCodec svq1_encoder;
2145 extern AVCodec x264_encoder;
2146
2147 extern AVCodec h263_decoder;
2148 extern AVCodec h261_decoder;
2149 extern AVCodec mpeg4_decoder;
2150 extern AVCodec msmpeg4v1_decoder;
2151 extern AVCodec msmpeg4v2_decoder;
2152 extern AVCodec msmpeg4v3_decoder;
2153 extern AVCodec wmv1_decoder;
2154 extern AVCodec wmv2_decoder;
2155 extern AVCodec vc1_decoder;
2156 extern AVCodec wmv3_decoder;
2157 extern AVCodec mpeg1video_decoder;
2158 extern AVCodec mpeg2video_decoder;
2159 extern AVCodec mpegvideo_decoder;
2160 extern AVCodec mpeg_xvmc_decoder;
2161 extern AVCodec h263i_decoder;
2162 extern AVCodec flv_decoder;
2163 extern AVCodec rv10_decoder;
2164 extern AVCodec rv20_decoder;
2165 extern AVCodec rv30_decoder;
2166 extern AVCodec rv40_decoder;
2167 extern AVCodec svq1_decoder;
2168 extern AVCodec svq3_decoder;
2169 extern AVCodec dvvideo_decoder;
2170 extern AVCodec wmav1_decoder;
2171 extern AVCodec wmav2_decoder;
2172 extern AVCodec mjpeg_decoder;
2173 extern AVCodec mjpegb_decoder;
2174 extern AVCodec sp5x_decoder;
2175 extern AVCodec png_decoder;
2176 extern AVCodec mp2_decoder;
2177 extern AVCodec mp3_decoder;
2178 extern AVCodec mp3adu_decoder;
2179 extern AVCodec mp3on4_decoder;
2180 extern AVCodec qdm2_decoder;
2181 extern AVCodec cook_decoder;
2182 extern AVCodec truespeech_decoder;
2183 extern AVCodec tta_decoder;
2184 extern AVCodec mace3_decoder;
2185 extern AVCodec mace6_decoder;
2186 extern AVCodec huffyuv_decoder;
2187 extern AVCodec ffvhuff_decoder;
2188 extern AVCodec oggvorbis_decoder;
2189 extern AVCodec cyuv_decoder;
2190 extern AVCodec h264_decoder;
2191 extern AVCodec indeo3_decoder;
2192 extern AVCodec vp3_decoder;
2193 extern AVCodec theora_decoder;
2194 extern AVCodec amr_nb_decoder;
2195 extern AVCodec amr_nb_encoder;
2196 extern AVCodec amr_wb_encoder;
2197 extern AVCodec amr_wb_decoder;
2198 extern AVCodec aac_decoder;
2199 extern AVCodec mpeg4aac_decoder;
2200 extern AVCodec asv1_decoder;
2201 extern AVCodec asv2_decoder;
2202 extern AVCodec vcr1_decoder;
2203 extern AVCodec cljr_decoder;
2204 extern AVCodec ffv1_decoder;
2205 extern AVCodec snow_decoder;
2206 extern AVCodec fourxm_decoder;
2207 extern AVCodec mdec_decoder;
2208 extern AVCodec roq_decoder;
2209 extern AVCodec interplay_video_decoder;
2210 extern AVCodec xan_wc3_decoder;
2211 extern AVCodec rpza_decoder;
2212 extern AVCodec cinepak_decoder;
2213 extern AVCodec msrle_decoder;
2214 extern AVCodec msvideo1_decoder;
2215 extern AVCodec vqa_decoder;
2216 extern AVCodec idcin_decoder;
2217 extern AVCodec eightbps_decoder;
2218 extern AVCodec smc_decoder;
2219 extern AVCodec flic_decoder;
2220 extern AVCodec vmdvideo_decoder;
2221 extern AVCodec vmdaudio_decoder;
2222 extern AVCodec truemotion1_decoder;
2223 extern AVCodec truemotion2_decoder;
2224 extern AVCodec mszh_decoder;
2225 extern AVCodec zlib_decoder;
2226 extern AVCodec ra_144_decoder;
2227 extern AVCodec ra_288_decoder;
2228 extern AVCodec roq_dpcm_decoder;
2229 extern AVCodec interplay_dpcm_decoder;
2230 extern AVCodec xan_dpcm_decoder;
2231 extern AVCodec sol_dpcm_decoder;
2232 extern AVCodec sonic_decoder;
2233 extern AVCodec qtrle_decoder;
2234 extern AVCodec flac_decoder;
2235 extern AVCodec tscc_decoder;
2236 extern AVCodec cscd_decoder;
2237 extern AVCodec nuv_decoder;
2238 extern AVCodec ulti_decoder;
2239 extern AVCodec qdraw_decoder;
2240 extern AVCodec xl_decoder;
2241 extern AVCodec qpeg_decoder;
2242 extern AVCodec shorten_decoder;
2243 extern AVCodec loco_decoder;
2244 extern AVCodec wnv1_decoder;
2245 extern AVCodec aasc_decoder;
2246 extern AVCodec alac_decoder;
2247 extern AVCodec ws_snd1_decoder;
2248 extern AVCodec indeo2_decoder;
2249 extern AVCodec vorbis_decoder;
2250 extern AVCodec fraps_decoder;
2251 extern AVCodec libgsm_encoder;
2252 extern AVCodec libgsm_decoder;
2253 extern AVCodec bmp_decoder;
2254 extern AVCodec mmvideo_decoder;
2255 extern AVCodec zmbv_decoder;
2256 extern AVCodec avs_decoder;
2257 extern AVCodec smacker_decoder;
2258 extern AVCodec smackaud_decoder;
2259 extern AVCodec kmvc_decoder;
2260 extern AVCodec flashsv_decoder;
2261 extern AVCodec cavs_decoder;
2262
2263 /* pcm codecs */
2264 #define PCM_CODEC(id, name) \
2265 extern AVCodec name ## _decoder; \
2266 extern AVCodec name ## _encoder
2267
2268 PCM_CODEC(CODEC_ID_PCM_S32LE, pcm_s32le);
2269 PCM_CODEC(CODEC_ID_PCM_S32BE, pcm_s32be);
2270 PCM_CODEC(CODEC_ID_PCM_U32LE, pcm_u32le);
2271 PCM_CODEC(CODEC_ID_PCM_U32BE, pcm_u32be);
2272 PCM_CODEC(CODEC_ID_PCM_S24LE, pcm_s24le);
2273 PCM_CODEC(CODEC_ID_PCM_S24BE, pcm_s24be);
2274 PCM_CODEC(CODEC_ID_PCM_U24LE, pcm_u24le);
2275 PCM_CODEC(CODEC_ID_PCM_U24BE, pcm_u24be);
2276 PCM_CODEC(CODEC_ID_PCM_S24DAUD, pcm_s24daud);
2277 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
2278 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
2279 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
2280 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
2281 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
2282 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
2283 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
2284 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
2285
2286 /* adpcm codecs */
2287
2288 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
2289 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
2290 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
2291 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
2292 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
2293 PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
2294 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
2295 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
2296 PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
2297 PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
2298 PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
2299 PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
2300 PCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
2301 PCM_CODEC(CODEC_ID_ADPCM_SWF, adpcm_swf);
2302 PCM_CODEC(CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha);
2303 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4);
2304 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3);
2305 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_2, adpcm_sbpro_2);
2306
2307 #undef PCM_CODEC
2308
2309 /* dummy raw video codec */
2310 extern AVCodec rawvideo_encoder;
2311 extern AVCodec rawvideo_decoder;
2312
2313 /* the following codecs use external GPL libs */
2314 extern AVCodec ac3_decoder;
2315 extern AVCodec dts_decoder;
2316
2317 /* subtitles */
2318 extern AVCodec dvdsub_encoder;
2319 extern AVCodec dvdsub_decoder;
2320 extern AVCodec dvbsub_encoder;
2321 extern AVCodec dvbsub_decoder;
2322
2323 /* resample.c */
2324
2325 struct ReSampleContext;
2326 struct AVResampleContext;
2327
2328 typedef struct ReSampleContext ReSampleContext;
2329
2330 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2331 int output_rate, int input_rate);
2332 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2333 void audio_resample_close(ReSampleContext *s);
2334
2335 struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2336 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2337 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2338 void av_resample_close(struct AVResampleContext *c);
2339
2340 /* YUV420 format is assumed ! */
2341
2342 struct ImgReSampleContext;
2343
2344 typedef struct ImgReSampleContext ImgReSampleContext;
2345
2346 ImgReSampleContext *img_resample_init(int output_width, int output_height,
2347 int input_width, int input_height);
2348
2349 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
2350 int iwidth, int iheight,
2351 int topBand, int bottomBand,
2352 int leftBand, int rightBand,
2353 int padtop, int padbottom,
2354 int padleft, int padright);
2355
2356
2357 void img_resample(ImgReSampleContext *s,
2358 AVPicture *output, const AVPicture *input);
2359
2360 void img_resample_close(ImgReSampleContext *s);
2361
2362 /**
2363 * Allocate memory for a picture. Call avpicture_free to free it.
2364 *
2365 * @param picture the picture to be filled in.
2366 * @param pix_fmt the format of the picture.
2367 * @param width the width of the picture.
2368 * @param height the height of the picture.
2369 * @return 0 if successful, -1 if not.
2370 */
2371 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2372
2373 /* Free a picture previously allocated by avpicture_alloc. */
2374 void avpicture_free(AVPicture *picture);
2375
2376 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2377 int pix_fmt, int width, int height);
2378 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2379 unsigned char *dest, int dest_size);
2380 int avpicture_get_size(int pix_fmt, int width, int height);
2381 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2382 const char *avcodec_get_pix_fmt_name(int pix_fmt);
2383 void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2384 enum PixelFormat avcodec_get_pix_fmt(const char* name);
2385 unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2386
2387 #define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
2388 #define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
2389 #define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
2390 #define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
2391 #define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
2392 #define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
2393
2394 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2395 int has_alpha);
2396 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2397 int has_alpha, int *loss_ptr);
2398
2399 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
2400 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
2401 int img_get_alpha_info(const AVPicture *src,
2402 int pix_fmt, int width, int height);
2403
2404 /* convert among pixel formats */
2405 int img_convert(AVPicture *dst, int dst_pix_fmt,
2406 const AVPicture *src, int pix_fmt,
2407 int width, int height);
2408
2409 /* deinterlace a picture */
2410 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2411 int pix_fmt, int width, int height);
2412
2413 /* external high level API */
2414
2415 extern AVCodec *first_avcodec;
2416
2417 /* returns LIBAVCODEC_VERSION_INT constant */
2418 unsigned avcodec_version(void);
2419 /* returns LIBAVCODEC_BUILD constant */
2420 unsigned avcodec_build(void);
2421 void avcodec_init(void);
2422
2423 void register_avcodec(AVCodec *format);
2424 AVCodec *avcodec_find_encoder(enum CodecID id);
2425 AVCodec *avcodec_find_encoder_by_name(const char *name);
2426 AVCodec *avcodec_find_decoder(enum CodecID id);
2427 AVCodec *avcodec_find_decoder_by_name(const char *name);
2428 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2429
2430 void avcodec_get_context_defaults(AVCodecContext *s);
2431 AVCodecContext *avcodec_alloc_context(void);
2432 void avcodec_get_frame_defaults(AVFrame *pic);
2433 AVFrame *avcodec_alloc_frame(void);
2434
2435 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2436 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2437 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2438 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2439 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2440 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2441
2442 int avcodec_thread_init(AVCodecContext *s, int thread_count);
2443 void avcodec_thread_free(AVCodecContext *s);
2444 int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2445 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2446 //FIXME func typedef
2447
2448 /**
2449 * opens / inits the AVCodecContext.
2450 * not thread save!
2451 */
2452 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2453
2454 /**
2455 * Decode an audio frame.
2456 *
2457 * @param avctx the codec context.
2458 * @param samples output buffer, 16 byte aligned
2459 * @param frame_size_ptr the output buffer size in bytes, zero if no frame could be compressed
2460 * @param buf input buffer, 16 byte aligned
2461 * @param buf_size the input buffer size
2462 * @return 0 if successful, -1 if not.
2463 */
2464
2465 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2466 int *frame_size_ptr,
2467 uint8_t *buf, int buf_size);
2468 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2469 int *got_picture_ptr,
2470 uint8_t *buf, int buf_size);
2471 int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
2472 int *got_sub_ptr,
2473 const uint8_t *buf, int buf_size);
2474 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2475 int *data_size_ptr,
2476 uint8_t *buf, int buf_size);
2477 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2478 const short *samples);
2479 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2480 const AVFrame *pict);
2481 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2482 const AVSubtitle *sub);
2483
2484 int avcodec_close(AVCodecContext *avctx);
2485
2486 void avcodec_register_all(void);
2487
2488 void avcodec_flush_buffers(AVCodecContext *avctx);
2489
2490 void avcodec_default_free_buffers(AVCodecContext *s);
2491
2492 /* misc usefull functions */
2493
2494 /**
2495 * returns a single letter to describe the picture type
2496 */
2497 char av_get_pict_type_char(int pict_type);
2498
2499 /**
2500 * returns codec bits per sample
2501 */
2502 int av_get_bits_per_sample(enum CodecID codec_id);
2503
2504 /* frame parsing */
2505 typedef struct AVCodecParserContext {
2506 void *priv_data;
2507 struct AVCodecParser *parser;
2508 int64_t frame_offset; /* offset of the current frame */
2509 int64_t cur_offset; /* current offset
2510 (incremented by each av_parser_parse()) */
2511 int64_t last_frame_offset; /* offset of the last frame */
2512 /* video info */
2513 int pict_type; /* XXX: put it back in AVCodecContext */
2514 int repeat_pict; /* XXX: put it back in AVCodecContext */
2515 int64_t pts; /* pts of the current frame */
2516 int64_t dts; /* dts of the current frame */
2517
2518 /* private data */
2519 int64_t last_pts;
2520 int64_t last_dts;
2521 int fetch_timestamp;
2522
2523 #define AV_PARSER_PTS_NB 4
2524 int cur_frame_start_index;
2525 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2526 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2527 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2528
2529 int flags;
2530 #define PARSER_FLAG_COMPLETE_FRAMES 0x0001
2531 } AVCodecParserContext;
2532
2533 typedef struct AVCodecParser {
2534 int codec_ids[5]; /* several codec IDs are permitted */
2535 int priv_data_size;
2536 int (*parser_init)(AVCodecParserContext *s);
2537 int (*parser_parse)(AVCodecParserContext *s,
2538 AVCodecContext *avctx,
2539 uint8_t **poutbuf, int *poutbuf_size,
2540 const uint8_t *buf, int buf_size);
2541 void (*parser_close)(AVCodecParserContext *s);
2542 int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
2543 struct AVCodecParser *next;
2544 } AVCodecParser;
2545
2546 extern AVCodecParser *av_first_parser;
2547
2548 void av_register_codec_parser(AVCodecParser *parser);
2549 AVCodecParserContext *av_parser_init(int codec_id);
2550 int av_parser_parse(AVCodecParserContext *s,
2551 AVCodecContext *avctx,
2552 uint8_t **poutbuf, int *poutbuf_size,
2553 const uint8_t *buf, int buf_size,
2554 int64_t pts, int64_t dts);
2555 int av_parser_change(AVCodecParserContext *s,
2556 AVCodecContext *avctx,
2557 uint8_t **poutbuf, int *poutbuf_size,
2558 const uint8_t *buf, int buf_size, int keyframe);
2559 void av_parser_close(AVCodecParserContext *s);
2560
2561 extern AVCodecParser mpegvideo_parser;
2562 extern AVCodecParser mpeg4video_parser;
2563 extern AVCodecParser cavsvideo_parser;
2564 extern AVCodecParser h261_parser;
2565 extern AVCodecParser h263_parser;
2566 extern AVCodecParser h264_parser;
2567 extern AVCodecParser mjpeg_parser;
2568 extern AVCodecParser pnm_parser;
2569 extern AVCodecParser mpegaudio_parser;
2570 extern AVCodecParser ac3_parser;
2571 extern AVCodecParser dvdsub_parser;
2572 extern AVCodecParser dvbsub_parser;
2573 extern AVCodecParser aac_parser;
2574
2575
2576 typedef struct AVBitStreamFilterContext {
2577 void *priv_data;
2578 struct AVBitStreamFilter *filter;
2579 AVCodecParserContext *parser;
2580 struct AVBitStreamFilterContext *next;
2581 } AVBitStreamFilterContext;
2582
2583
2584 typedef struct AVBitStreamFilter {
2585 const char *name;
2586 int priv_data_size;
2587 int (*filter)(AVBitStreamFilterContext *bsfc,
2588 AVCodecContext *avctx, const char *args,
2589 uint8_t **poutbuf, int *poutbuf_size,
2590 const uint8_t *buf, int buf_size, int keyframe);
2591 struct AVBitStreamFilter *next;
2592 } AVBitStreamFilter;
2593
2594 extern AVBitStreamFilter *av_first_bitstream_filter;
2595
2596 void av_register_bitstream_filter(AVBitStreamFilter *bsf);
2597 AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
2598 int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
2599 AVCodecContext *avctx, const char *args,
2600 uint8_t **poutbuf, int *poutbuf_size,
2601 const uint8_t *buf, int buf_size, int keyframe);
2602 void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
2603
2604 extern AVBitStreamFilter dump_extradata_bsf;
2605 extern AVBitStreamFilter remove_extradata_bsf;
2606 extern AVBitStreamFilter noise_bsf;
2607
2608
2609 /* memory */
2610 void *av_mallocz(unsigned int size);
2611 char *av_strdup(const char *s);
2612 void av_freep(void *ptr);
2613 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2614 /* for static data only */
2615 /* call av_free_static to release all staticaly allocated tables */
2616 void av_free_static(void);
2617 void *av_mallocz_static(unsigned int size);
2618 void *av_realloc_static(void *ptr, unsigned int size);
2619
2620 void img_copy(AVPicture *dst, const AVPicture *src,
2621 int pix_fmt, int width, int height);
2622
2623 int img_crop(AVPicture *dst, const AVPicture *src,
2624 int pix_fmt, int top_band, int left_band);
2625
2626 int img_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
2627 int padtop, int padbottom, int padleft, int padright, int *color);
2628
2629 /* endian macros */
2630 #if !defined(BE_16) || !defined(BE_32) || !defined(LE_16) || !defined(LE_32)
2631 #define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
2632 #define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
2633 (((uint8_t*)(x))[1] << 16) | \
2634 (((uint8_t*)(x))[2] << 8) | \
2635 ((uint8_t*)(x))[3])
2636 #define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
2637 #define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \
2638 (((uint8_t*)(x))[2] << 16) | \
2639 (((uint8_t*)(x))[1] << 8) | \
2640 ((uint8_t*)(x))[0])
2641 #endif
2642
2643 extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
2644
2645 #ifdef __cplusplus
2646 }
2647 #endif
2648
2649 #endif /* AVCODEC_H */