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[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 "common.h"
15 #include "rational.h"
16 #include <sys/types.h> /* size_t */
17
18 //FIXME the following 2 really dont belong in here
19 #define FFMPEG_VERSION_INT 0x000409
20 #define FFMPEG_VERSION "CVS"
21
22 #define AV_STRINGIFY(s) AV_TOSTRING(s)
23 #define AV_TOSTRING(s) #s
24
25 #define LIBAVCODEC_VERSION_INT ((49<<16)+(0<<8)+0)
26 #define LIBAVCODEC_VERSION 49.0.0
27 #define LIBAVCODEC_BUILD LIBAVCODEC_VERSION_INT
28
29 #define LIBAVCODEC_IDENT "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
30
31 #define AV_NOPTS_VALUE int64_t_C(0x8000000000000000)
32 #define AV_TIME_BASE 1000000
33 #define AV_TIME_BASE_Q (AVRational){1, AV_TIME_BASE}
34
35 enum CodecID {
36 CODEC_ID_NONE,
37 CODEC_ID_MPEG1VIDEO,
38 CODEC_ID_MPEG2VIDEO, /* prefered ID for MPEG Video 1 or 2 decoding */
39 CODEC_ID_MPEG2VIDEO_XVMC,
40 CODEC_ID_H261,
41 CODEC_ID_H263,
42 CODEC_ID_RV10,
43 CODEC_ID_RV20,
44 CODEC_ID_MJPEG,
45 CODEC_ID_MJPEGB,
46 CODEC_ID_LJPEG,
47 CODEC_ID_SP5X,
48 CODEC_ID_MPEG4,
49 CODEC_ID_RAWVIDEO,
50 CODEC_ID_MSMPEG4V1,
51 CODEC_ID_MSMPEG4V2,
52 CODEC_ID_MSMPEG4V3,
53 CODEC_ID_WMV1,
54 CODEC_ID_WMV2,
55 CODEC_ID_H263P,
56 CODEC_ID_H263I,
57 CODEC_ID_FLV1,
58 CODEC_ID_SVQ1,
59 CODEC_ID_SVQ3,
60 CODEC_ID_DVVIDEO,
61 CODEC_ID_HUFFYUV,
62 CODEC_ID_CYUV,
63 CODEC_ID_H264,
64 CODEC_ID_INDEO3,
65 CODEC_ID_VP3,
66 CODEC_ID_THEORA,
67 CODEC_ID_ASV1,
68 CODEC_ID_ASV2,
69 CODEC_ID_FFV1,
70 CODEC_ID_4XM,
71 CODEC_ID_VCR1,
72 CODEC_ID_CLJR,
73 CODEC_ID_MDEC,
74 CODEC_ID_ROQ,
75 CODEC_ID_INTERPLAY_VIDEO,
76 CODEC_ID_XAN_WC3,
77 CODEC_ID_XAN_WC4,
78 CODEC_ID_RPZA,
79 CODEC_ID_CINEPAK,
80 CODEC_ID_WS_VQA,
81 CODEC_ID_MSRLE,
82 CODEC_ID_MSVIDEO1,
83 CODEC_ID_IDCIN,
84 CODEC_ID_8BPS,
85 CODEC_ID_SMC,
86 CODEC_ID_FLIC,
87 CODEC_ID_TRUEMOTION1,
88 CODEC_ID_VMDVIDEO,
89 CODEC_ID_MSZH,
90 CODEC_ID_ZLIB,
91 CODEC_ID_QTRLE,
92 CODEC_ID_SNOW,
93 CODEC_ID_TSCC,
94 CODEC_ID_ULTI,
95 CODEC_ID_QDRAW,
96 CODEC_ID_VIXL,
97 CODEC_ID_QPEG,
98 CODEC_ID_XVID,
99 CODEC_ID_PNG,
100 CODEC_ID_PPM,
101 CODEC_ID_PBM,
102 CODEC_ID_PGM,
103 CODEC_ID_PGMYUV,
104 CODEC_ID_PAM,
105 CODEC_ID_FFVHUFF,
106 CODEC_ID_RV30,
107 CODEC_ID_RV40,
108 CODEC_ID_VC9,
109 CODEC_ID_WMV3,
110 CODEC_ID_LOCO,
111 CODEC_ID_WNV1,
112 CODEC_ID_AASC,
113 CODEC_ID_INDEO2,
114 CODEC_ID_FRAPS,
115
116 /* various pcm "codecs" */
117 CODEC_ID_PCM_S16LE= 0x10000,
118 CODEC_ID_PCM_S16BE,
119 CODEC_ID_PCM_U16LE,
120 CODEC_ID_PCM_U16BE,
121 CODEC_ID_PCM_S8,
122 CODEC_ID_PCM_U8,
123 CODEC_ID_PCM_MULAW,
124 CODEC_ID_PCM_ALAW,
125
126 /* various adpcm codecs */
127 CODEC_ID_ADPCM_IMA_QT= 0x11000,
128 CODEC_ID_ADPCM_IMA_WAV,
129 CODEC_ID_ADPCM_IMA_DK3,
130 CODEC_ID_ADPCM_IMA_DK4,
131 CODEC_ID_ADPCM_IMA_WS,
132 CODEC_ID_ADPCM_IMA_SMJPEG,
133 CODEC_ID_ADPCM_MS,
134 CODEC_ID_ADPCM_4XM,
135 CODEC_ID_ADPCM_XA,
136 CODEC_ID_ADPCM_ADX,
137 CODEC_ID_ADPCM_EA,
138 CODEC_ID_ADPCM_G726,
139 CODEC_ID_ADPCM_CT,
140 CODEC_ID_ADPCM_SWF,
141 CODEC_ID_ADPCM_YAMAHA,
142
143 /* AMR */
144 CODEC_ID_AMR_NB= 0x12000,
145 CODEC_ID_AMR_WB,
146
147 /* RealAudio codecs*/
148 CODEC_ID_RA_144= 0x13000,
149 CODEC_ID_RA_288,
150
151 /* various DPCM codecs */
152 CODEC_ID_ROQ_DPCM= 0x14000,
153 CODEC_ID_INTERPLAY_DPCM,
154 CODEC_ID_XAN_DPCM,
155 CODEC_ID_SOL_DPCM,
156
157 CODEC_ID_MP2= 0x15000,
158 CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
159 CODEC_ID_AAC,
160 CODEC_ID_MPEG4AAC,
161 CODEC_ID_AC3,
162 CODEC_ID_DTS,
163 CODEC_ID_VORBIS,
164 CODEC_ID_DVAUDIO,
165 CODEC_ID_WMAV1,
166 CODEC_ID_WMAV2,
167 CODEC_ID_MACE3,
168 CODEC_ID_MACE6,
169 CODEC_ID_VMDAUDIO,
170 CODEC_ID_SONIC,
171 CODEC_ID_SONIC_LS,
172 CODEC_ID_FLAC,
173 CODEC_ID_MP3ADU,
174 CODEC_ID_MP3ON4,
175 CODEC_ID_SHORTEN,
176 CODEC_ID_ALAC,
177 CODEC_ID_WESTWOOD_SND1,
178 CODEC_ID_GSM,
179
180 CODEC_ID_OGGTHEORA= 0x16000,
181
182 /* subtitle codecs */
183 CODEC_ID_DVD_SUBTITLE= 0x17000,
184 CODEC_ID_DVB_SUBTITLE,
185
186 CODEC_ID_MPEG2TS= 0x20000, /* _FAKE_ codec to indicate a raw MPEG2 transport
187 stream (only used by libavformat) */
188 };
189
190 /* CODEC_ID_MP3LAME is absolete */
191 #define CODEC_ID_MP3LAME CODEC_ID_MP3
192
193 enum CodecType {
194 CODEC_TYPE_UNKNOWN = -1,
195 CODEC_TYPE_VIDEO,
196 CODEC_TYPE_AUDIO,
197 CODEC_TYPE_DATA,
198 CODEC_TYPE_SUBTITLE,
199 };
200
201 /**
202 * Pixel format. Notes:
203 *
204 * PIX_FMT_RGBA32 is handled in an endian-specific manner. A RGBA
205 * color is put together as:
206 * (A << 24) | (R << 16) | (G << 8) | B
207 * This is stored as BGRA on little endian CPU architectures and ARGB on
208 * big endian CPUs.
209 *
210 * When the pixel format is palettized RGB (PIX_FMT_PAL8), the palettized
211 * image data is stored in AVFrame.data[0]. The palette is transported in
212 * AVFrame.data[1] and, is 1024 bytes long (256 4-byte entries) and is
213 * formatted the same as in PIX_FMT_RGBA32 described above (i.e., it is
214 * also endian-specific). Note also that the individual RGB palette
215 * components stored in AVFrame.data[1] should be in the range 0..255.
216 * This is important as many custom PAL8 video codecs that were designed
217 * to run on the IBM VGA graphics adapter use 6-bit palette components.
218 */
219 enum PixelFormat {
220 PIX_FMT_NONE= -1,
221 PIX_FMT_YUV420P, ///< Planar YUV 4:2:0 (1 Cr & Cb sample per 2x2 Y samples)
222 PIX_FMT_YUV422, ///< Packed pixel, Y0 Cb Y1 Cr
223 PIX_FMT_RGB24, ///< Packed pixel, 3 bytes per pixel, RGBRGB...
224 PIX_FMT_BGR24, ///< Packed pixel, 3 bytes per pixel, BGRBGR...
225 PIX_FMT_YUV422P, ///< Planar YUV 4:2:2 (1 Cr & Cb sample per 2x1 Y samples)
226 PIX_FMT_YUV444P, ///< Planar YUV 4:4:4 (1 Cr & Cb sample per 1x1 Y samples)
227 PIX_FMT_RGBA32, ///< Packed pixel, 4 bytes per pixel, BGRABGRA..., stored in cpu endianness
228 PIX_FMT_YUV410P, ///< Planar YUV 4:1:0 (1 Cr & Cb sample per 4x4 Y samples)
229 PIX_FMT_YUV411P, ///< Planar YUV 4:1:1 (1 Cr & Cb sample per 4x1 Y samples)
230 PIX_FMT_RGB565, ///< always stored in cpu endianness
231 PIX_FMT_RGB555, ///< always stored in cpu endianness, most significant bit to 1
232 PIX_FMT_GRAY8,
233 PIX_FMT_MONOWHITE, ///< 0 is white
234 PIX_FMT_MONOBLACK, ///< 0 is black
235 PIX_FMT_PAL8, ///< 8 bit with RGBA palette
236 PIX_FMT_YUVJ420P, ///< Planar YUV 4:2:0 full scale (jpeg)
237 PIX_FMT_YUVJ422P, ///< Planar YUV 4:2:2 full scale (jpeg)
238 PIX_FMT_YUVJ444P, ///< Planar YUV 4:4:4 full scale (jpeg)
239 PIX_FMT_XVMC_MPEG2_MC,///< XVideo Motion Acceleration via common packet passing(xvmc_render.h)
240 PIX_FMT_XVMC_MPEG2_IDCT,
241 PIX_FMT_UYVY422, ///< Packed pixel, Cb Y0 Cr Y1
242 PIX_FMT_UYVY411, ///< Packed pixel, Cb Y0 Y1 Cr Y2 Y3
243 PIX_FMT_NB,
244 };
245
246 /* currently unused, may be used if 24/32 bits samples ever supported */
247 enum SampleFormat {
248 SAMPLE_FMT_S16 = 0, ///< signed 16 bits
249 SAMPLE_FMT_S32, ///< signed 32 bits
250 SAMPLE_FMT_FLT, ///< float
251 SAMPLE_FMT_DBL, ///< double
252 };
253
254 /* in bytes */
255 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 131072
256
257 /**
258 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
259 * this is mainly needed because some optimized bitstream readers read
260 * 32 or 64 bit at once and could read over the end<br>
261 * Note, if the first 23 bits of the additional bytes are not 0 then damaged
262 * MPEG bitstreams could cause overread and segfault
263 */
264 #define FF_INPUT_BUFFER_PADDING_SIZE 8
265
266 /**
267 * minimum encoding buffer size.
268 * used to avoid some checks during header writing
269 */
270 #define FF_MIN_BUFFER_SIZE 16384
271
272 /* motion estimation type, EPZS by default */
273 enum Motion_Est_ID {
274 ME_ZERO = 1,
275 ME_FULL,
276 ME_LOG,
277 ME_PHODS,
278 ME_EPZS,
279 ME_X1
280 };
281
282 enum AVRounding {
283 AV_ROUND_ZERO = 0, ///< round toward zero
284 AV_ROUND_INF = 1, ///< round away from zero
285 AV_ROUND_DOWN = 2, ///< round toward -infinity
286 AV_ROUND_UP = 3, ///< round toward +infinity
287 AV_ROUND_NEAR_INF = 5, ///< round to nearest and halfway cases away from zero
288 };
289
290 enum AVDiscard{
291 //we leave some space between them for extensions (drop some keyframes for intra only or drop just some bidir frames)
292 AVDISCARD_NONE =-16, ///< discard nothing
293 AVDISCARD_DEFAULT= 0, ///< discard useless packets like 0 size packets in avi
294 AVDISCARD_NONREF = 8, ///< discard all non reference
295 AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
296 AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
297 AVDISCARD_ALL = 48, ///< discard all
298 };
299
300 typedef struct RcOverride{
301 int start_frame;
302 int end_frame;
303 int qscale; // if this is 0 then quality_factor will be used instead
304 float quality_factor;
305 } RcOverride;
306
307 /* only for ME compatiblity with old apps */
308 extern int motion_estimation_method;
309
310 #define FF_MAX_B_FRAMES 8
311
312 /* encoding support
313 these flags can be passed in AVCodecContext.flags before initing
314 Note: not everything is supported yet.
315 */
316
317 #define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
318 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / Advanced prediction for H263
319 #define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
320 #define CODEC_FLAG_GMC 0x0020 ///< use GMC
321 #define CODEC_FLAG_MV0 0x0040 ///< always try a MB with MV=<0,0>
322 #define CODEC_FLAG_PART 0x0080 ///< use data partitioning
323 /* parent program gurantees that the input for b-frame containing streams is not written to
324 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
325 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
326 #define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
327 #define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
328 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
329 #define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
330 #define CODEC_FLAG_EMU_EDGE 0x4000///< don't draw edges
331 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
332 #define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
333 of only at frame boundaries */
334 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
335 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
336 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay
337 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
338 #define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
339 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
340 #define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
341 /* Fx : Flag for h263+ extra options */
342 #define CODEC_FLAG_H263P_AIC 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
343 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
344 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
345 #define CODEC_FLAG_CBP_RD 0x04000000 ///< use rate distortion optimization for cbp
346 #define CODEC_FLAG_QP_RD 0x08000000 ///< use rate distortion optimization for qp selectioon
347 #define CODEC_FLAG_H263P_AIV 0x00000008 ///< H263 Alternative inter vlc
348 #define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
349 #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
350 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
351 #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
352 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
353 #define CODEC_FLAG_CLOSED_GOP 0x80000000
354 #define CODEC_FLAG2_FAST 0x00000001 ///< allow non spec compliant speedup tricks
355 #define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< strictly enforce GOP size
356 #define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< skip bitstream encoding
357 #define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< place global headers at every keyframe instead of in extradata
358
359 /* Unsupported options :
360 * Syntax Arithmetic coding (SAC)
361 * Reference Picture Selection
362 * Independant Segment Decoding */
363 /* /Fx */
364 /* codec capabilities */
365
366 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
367 /**
368 * Codec uses get_buffer() for allocating buffers.
369 * direct rendering method 1
370 */
371 #define CODEC_CAP_DR1 0x0002
372 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
373 used */
374 #define CODEC_CAP_PARSE_ONLY 0x0004
375 #define CODEC_CAP_TRUNCATED 0x0008
376 /* codec can export data for HW decoding (XvMC) */
377 #define CODEC_CAP_HWACCEL 0x0010
378 /**
379 * codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data.
380 * if this is not set, the codec is guranteed to never be feeded with NULL data
381 */
382 #define CODEC_CAP_DELAY 0x0020
383
384 //the following defines may change, don't expect compatibility if you use them
385 #define MB_TYPE_INTRA4x4 0x0001
386 #define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
387 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME h264 specific
388 #define MB_TYPE_16x16 0x0008
389 #define MB_TYPE_16x8 0x0010
390 #define MB_TYPE_8x16 0x0020
391 #define MB_TYPE_8x8 0x0040
392 #define MB_TYPE_INTERLACED 0x0080
393 #define MB_TYPE_DIRECT2 0x0100 //FIXME
394 #define MB_TYPE_ACPRED 0x0200
395 #define MB_TYPE_GMC 0x0400
396 #define MB_TYPE_SKIP 0x0800
397 #define MB_TYPE_P0L0 0x1000
398 #define MB_TYPE_P1L0 0x2000
399 #define MB_TYPE_P0L1 0x4000
400 #define MB_TYPE_P1L1 0x8000
401 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
402 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
403 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
404 #define MB_TYPE_QUANT 0x00010000
405 #define MB_TYPE_CBP 0x00020000
406 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
407
408 /**
409 * Pan Scan area.
410 * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
411 */
412 typedef struct AVPanScan{
413 /**
414 * id.
415 * - encoding: set by user.
416 * - decoding: set by lavc
417 */
418 int id;
419
420 /**
421 * width and height in 1/16 pel
422 * - encoding: set by user.
423 * - decoding: set by lavc
424 */
425 int width;
426 int height;
427
428 /**
429 * position of the top left corner in 1/16 pel for up to 3 fields/frames.
430 * - encoding: set by user.
431 * - decoding: set by lavc
432 */
433 int16_t position[3][2];
434 }AVPanScan;
435
436 #define FF_COMMON_FRAME \
437 /**\
438 * pointer to the picture planes.\
439 * this might be different from the first allocated byte\
440 * - encoding: \
441 * - decoding: \
442 */\
443 uint8_t *data[4];\
444 int linesize[4];\
445 /**\
446 * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
447 * this isn't used by lavc unless the default get/release_buffer() is used\
448 * - encoding: \
449 * - decoding: \
450 */\
451 uint8_t *base[4];\
452 /**\
453 * 1 -> keyframe, 0-> not\
454 * - encoding: set by lavc\
455 * - decoding: set by lavc\
456 */\
457 int key_frame;\
458 \
459 /**\
460 * picture type of the frame, see ?_TYPE below.\
461 * - encoding: set by lavc for coded_picture (and set by user for input)\
462 * - decoding: set by lavc\
463 */\
464 int pict_type;\
465 \
466 /**\
467 * presentation timestamp in time_base units (time when frame should be shown to user)\
468 * if AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed\
469 * - encoding: MUST be set by user\
470 * - decoding: set by lavc\
471 */\
472 int64_t pts;\
473 \
474 /**\
475 * picture number in bitstream order.\
476 * - encoding: set by\
477 * - decoding: set by lavc\
478 */\
479 int coded_picture_number;\
480 /**\
481 * picture number in display order.\
482 * - encoding: set by\
483 * - decoding: set by lavc\
484 */\
485 int display_picture_number;\
486 \
487 /**\
488 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
489 * - encoding: set by lavc for coded_picture (and set by user for input)\
490 * - decoding: set by lavc\
491 */\
492 int quality; \
493 \
494 /**\
495 * buffer age (1->was last buffer and dint change, 2->..., ...).\
496 * set to INT_MAX if the buffer has not been used yet \
497 * - encoding: unused\
498 * - decoding: MUST be set by get_buffer()\
499 */\
500 int age;\
501 \
502 /**\
503 * is this picture used as reference\
504 * - encoding: unused\
505 * - decoding: set by lavc (before get_buffer() call))\
506 */\
507 int reference;\
508 \
509 /**\
510 * QP table\
511 * - encoding: unused\
512 * - decoding: set by lavc\
513 */\
514 int8_t *qscale_table;\
515 /**\
516 * QP store stride\
517 * - encoding: unused\
518 * - decoding: set by lavc\
519 */\
520 int qstride;\
521 \
522 /**\
523 * mbskip_table[mb]>=1 if MB didnt change\
524 * stride= mb_width = (width+15)>>4\
525 * - encoding: unused\
526 * - decoding: set by lavc\
527 */\
528 uint8_t *mbskip_table;\
529 \
530 /**\
531 * Motion vector table.\
532 * @code\
533 * example:\
534 * int mv_sample_log2= 4 - motion_subsample_log2;\
535 * int mb_width= (width+15)>>4;\
536 * int mv_stride= (mb_width << mv_sample_log2) + 1;\
537 * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
538 * @endcode\
539 * - encoding: set by user\
540 * - decoding: set by lavc\
541 */\
542 int16_t (*motion_val[2])[2];\
543 \
544 /**\
545 * Macroblock type table\
546 * mb_type_base + mb_width + 2\
547 * - encoding: set by user\
548 * - decoding: set by lavc\
549 */\
550 uint32_t *mb_type;\
551 \
552 /**\
553 * log2 of the size of the block which a single vector in motion_val represents: \
554 * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
555 * - encoding: unused\
556 * - decoding: set by lavc\
557 */\
558 uint8_t motion_subsample_log2;\
559 \
560 /**\
561 * for some private data of the user\
562 * - encoding: unused\
563 * - decoding: set by user\
564 */\
565 void *opaque;\
566 \
567 /**\
568 * error\
569 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
570 * - decoding: unused\
571 */\
572 uint64_t error[4];\
573 \
574 /**\
575 * type of the buffer (to keep track of who has to dealloc data[*])\
576 * - encoding: set by the one who allocs it\
577 * - decoding: set by the one who allocs it\
578 * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
579 */\
580 int type;\
581 \
582 /**\
583 * when decoding, this signal how much the picture must be delayed.\
584 * extra_delay = repeat_pict / (2*fps)\
585 * - encoding: unused\
586 * - decoding: set by lavc\
587 */\
588 int repeat_pict;\
589 \
590 /**\
591 * \
592 */\
593 int qscale_type;\
594 \
595 /**\
596 * The content of the picture is interlaced.\
597 * - encoding: set by user\
598 * - decoding: set by lavc (default 0)\
599 */\
600 int interlaced_frame;\
601 \
602 /**\
603 * if the content is interlaced, is top field displayed first.\
604 * - encoding: set by user\
605 * - decoding: set by lavc\
606 */\
607 int top_field_first;\
608 \
609 /**\
610 * Pan scan.\
611 * - encoding: set by user\
612 * - decoding: set by lavc\
613 */\
614 AVPanScan *pan_scan;\
615 \
616 /**\
617 * tell user application that palette has changed from previous frame.\
618 * - encoding: ??? (no palette-enabled encoder yet)\
619 * - decoding: set by lavc (default 0)\
620 */\
621 int palette_has_changed;\
622 \
623 /**\
624 * Codec suggestion on buffer type if != 0\
625 * - encoding: unused\
626 * - decoding: set by lavc (before get_buffer() call))\
627 */\
628 int buffer_hints;\
629 \
630 /**\
631 * DCT coeffitients\
632 * - encoding: unused\
633 * - decoding: set by lavc\
634 */\
635 short *dct_coeff;\
636 \
637 /**\
638 * Motion referece frame index\
639 * - encoding: set by user\
640 * - decoding: set by lavc\
641 */\
642 int8_t *ref_index[2];
643
644 #define FF_QSCALE_TYPE_MPEG1 0
645 #define FF_QSCALE_TYPE_MPEG2 1
646
647 #define FF_BUFFER_TYPE_INTERNAL 1
648 #define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
649 #define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewhere else, don't dealloc image (data/base), all other tables are not shared
650 #define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, don't dealloc anything
651
652
653 #define FF_I_TYPE 1 // Intra
654 #define FF_P_TYPE 2 // Predicted
655 #define FF_B_TYPE 3 // Bi-dir predicted
656 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
657 #define FF_SI_TYPE 5
658 #define FF_SP_TYPE 6
659
660 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore)
661 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
662 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
663 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
664
665 /**
666 * Audio Video Frame.
667 */
668 typedef struct AVFrame {
669 FF_COMMON_FRAME
670 } AVFrame;
671
672 #define DEFAULT_FRAME_RATE_BASE 1001000
673
674 /**
675 * Used by av_log
676 */
677 typedef struct AVCLASS AVClass;
678 struct AVCLASS {
679 const char* class_name;
680 const char* (*item_name)(void*); /* actually passing a pointer to an AVCodecContext
681 or AVFormatContext, which begin with an AVClass.
682 Needed because av_log is in libavcodec and has no visibility
683 of AVIn/OutputFormat */
684 };
685
686 /**
687 * main external api structure.
688 */
689 typedef struct AVCodecContext {
690 /**
691 * Info on struct for av_log
692 * - set by avcodec_alloc_context
693 */
694 AVClass *av_class;
695 /**
696 * the average bitrate.
697 * - encoding: set by user. unused for constant quantizer encoding
698 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
699 */
700 int bit_rate;
701
702 /**
703 * number of bits the bitstream is allowed to diverge from the reference.
704 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
705 * - encoding: set by user. unused for constant quantizer encoding
706 * - decoding: unused
707 */
708 int bit_rate_tolerance;
709
710 /**
711 * CODEC_FLAG_*.
712 * - encoding: set by user.
713 * - decoding: set by user.
714 */
715 int flags;
716
717 /**
718 * some codecs needs additionnal format info. It is stored here
719 * - encoding: set by user.
720 * - decoding: set by lavc. (FIXME is this ok?)
721 */
722 int sub_id;
723
724 /**
725 * motion estimation algorithm used for video coding.
726 * - encoding: MUST be set by user.
727 * - decoding: unused
728 */
729 int me_method;
730
731 /**
732 * some codecs need / can use extra-data like huffman tables.
733 * mjpeg: huffman tables
734 * rv10: additional flags
735 * mpeg4: global headers (they can be in the bitstream or here)
736 * the allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
737 * then extradata_size to avoid prolems if its read with the bitstream reader
738 * - encoding: set/allocated/freed by lavc.
739 * - decoding: set/allocated/freed by user.
740 */
741 void *extradata;
742 int extradata_size;
743
744 /* video only */
745 /**
746 * time base in which the timestamps are specified.
747 * - encoding: MUST be set by user
748 * - decoding: set by lavc.
749 */
750 AVRational time_base;
751
752 /**
753 * picture width / height.
754 * - encoding: MUST be set by user.
755 * - decoding: set by lavc.
756 * Note, for compatibility its possible to set this instead of
757 * coded_width/height before decoding
758 */
759 int width, height;
760
761 #define FF_ASPECT_EXTENDED 15
762
763 /**
764 * the number of pictures in a group of pitures, or 0 for intra_only.
765 * - encoding: set by user.
766 * - decoding: unused
767 */
768 int gop_size;
769
770 /**
771 * pixel format, see PIX_FMT_xxx.
772 * - encoding: set by user.
773 * - decoding: set by lavc.
774 */
775 enum PixelFormat pix_fmt;
776
777 /**
778 * Frame rate emulation. If not zero lower layer (i.e. format handler)
779 * has to read frames at native frame rate.
780 * - encoding: set by user.
781 * - decoding: unused.
782 */
783 int rate_emu;
784
785 /**
786 * if non NULL, 'draw_horiz_band' is called by the libavcodec
787 * decoder to draw an horizontal band. It improve cache usage. Not
788 * all codecs can do that. You must check the codec capabilities
789 * before
790 * - encoding: unused
791 * - decoding: set by user.
792 * @param height the height of the slice
793 * @param y the y position of the slice
794 * @param type 1->top field, 2->bottom field, 3->frame
795 * @param offset offset into the AVFrame.data from which the slice should be read
796 */
797 void (*draw_horiz_band)(struct AVCodecContext *s,
798 const AVFrame *src, int offset[4],
799 int y, int type, int height);
800
801 /* audio only */
802 int sample_rate; ///< samples per sec
803 int channels;
804
805 /**
806 * audio sample format.
807 * - encoding: set by user.
808 * - decoding: set by lavc.
809 */
810 enum SampleFormat sample_fmt; ///< sample format, currenly unused
811
812 /* the following data should not be initialized */
813 /**
814 * samples per packet. initialized when calling 'init'
815 */
816 int frame_size;
817 int frame_number; ///< audio or video frame number
818 int real_pict_num; ///< returns the real picture number of previous encoded frame
819
820 /**
821 * number of frames the decoded output will be delayed relative to
822 * the encoded input.
823 * - encoding: set by lavc.
824 * - decoding: unused
825 */
826 int delay;
827
828 /* - encoding parameters */
829 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
830 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
831
832 /**
833 * minimum quantizer.
834 * - encoding: set by user.
835 * - decoding: unused
836 */
837 int qmin;
838
839 /**
840 * maximum quantizer.
841 * - encoding: set by user.
842 * - decoding: unused
843 */
844 int qmax;
845
846 /**
847 * maximum quantizer difference etween frames.
848 * - encoding: set by user.
849 * - decoding: unused
850 */
851 int max_qdiff;
852
853 /**
854 * maximum number of b frames between non b frames.
855 * note: the output will be delayed by max_b_frames+1 relative to the input
856 * - encoding: set by user.
857 * - decoding: unused
858 */
859 int max_b_frames;
860
861 /**
862 * qscale factor between ip and b frames.
863 * - encoding: set by user.
864 * - decoding: unused
865 */
866 float b_quant_factor;
867
868 /** obsolete FIXME remove */
869 int rc_strategy;
870 int b_frame_strategy;
871
872 /**
873 * hurry up amount.
874 * deprecated in favor of skip_idct and skip_frame
875 * - encoding: unused
876 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
877 */
878 int hurry_up;
879
880 struct AVCodec *codec;
881
882 void *priv_data;
883
884 /* unused, FIXME remove*/
885 int rtp_mode;
886
887 int rtp_payload_size; /* The size of the RTP payload: the coder will */
888 /* do it's best to deliver a chunk with size */
889 /* below rtp_payload_size, the chunk will start */
890 /* with a start code on some codecs like H.263 */
891 /* This doesn't take account of any particular */
892 /* headers inside the transmited RTP payload */
893
894
895 /* The RTP callback: This function is called */
896 /* every time the encoder has a packet to send */
897 /* Depends on the encoder if the data starts */
898 /* with a Start Code (it should) H.263 does. */
899 /* mb_nb contains the number of macroblocks */
900 /* encoded in the RTP payload */
901 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
902
903 /* statistics, used for 2-pass encoding */
904 int mv_bits;
905 int header_bits;
906 int i_tex_bits;
907 int p_tex_bits;
908 int i_count;
909 int p_count;
910 int skip_count;
911 int misc_bits;
912
913 /**
914 * number of bits used for the previously encoded frame.
915 * - encoding: set by lavc
916 * - decoding: unused
917 */
918 int frame_bits;
919
920 /**
921 * private data of the user, can be used to carry app specific stuff.
922 * - encoding: set by user
923 * - decoding: set by user
924 */
925 void *opaque;
926
927 char codec_name[32];
928 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
929 enum CodecID codec_id; /* see CODEC_ID_xxx */
930
931 /**
932 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
933 * this is used to workaround some encoder bugs
934 * - encoding: set by user, if not then the default based on codec_id will be used
935 * - decoding: set by user, will be converted to upper case by lavc during init
936 */
937 unsigned int codec_tag;
938
939 /**
940 * workaround bugs in encoders which sometimes cannot be detected automatically.
941 * - encoding: set by user
942 * - decoding: set by user
943 */
944 int workaround_bugs;
945 #define FF_BUG_AUTODETECT 1 ///< autodetection
946 #define FF_BUG_OLD_MSMPEG4 2
947 #define FF_BUG_XVID_ILACE 4
948 #define FF_BUG_UMP4 8
949 #define FF_BUG_NO_PADDING 16
950 #define FF_BUG_AMV 32
951 #define FF_BUG_AC_VLC 0 ///< will be removed, libavcodec can now handle these non compliant files by default
952 #define FF_BUG_QPEL_CHROMA 64
953 #define FF_BUG_STD_QPEL 128
954 #define FF_BUG_QPEL_CHROMA2 256
955 #define FF_BUG_DIRECT_BLOCKSIZE 512
956 #define FF_BUG_EDGE 1024
957 #define FF_BUG_HPEL_CHROMA 2048
958 #define FF_BUG_DC_CLIP 4096
959 #define FF_BUG_MS 8192 ///< workaround various bugs in microsofts broken decoders
960 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
961
962 /**
963 * luma single coeff elimination threshold.
964 * - encoding: set by user
965 * - decoding: unused
966 */
967 int luma_elim_threshold;
968
969 /**
970 * chroma single coeff elimination threshold.
971 * - encoding: set by user
972 * - decoding: unused
973 */
974 int chroma_elim_threshold;
975
976 /**
977 * strictly follow the std (MPEG4, ...).
978 * - encoding: set by user
979 * - decoding: unused
980 */
981 int strict_std_compliance;
982 #define FF_COMPLIANCE_VERY_STRICT 2 ///< strictly conform to a older more strict version of the spec or reference software
983 #define FF_COMPLIANCE_STRICT 1 ///< strictly conform to all the things in the spec no matter what consequences
984 #define FF_COMPLIANCE_NORMAL 0
985 #define FF_COMPLIANCE_INOFFICIAL -1 ///< allow inofficial extensions
986 #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< allow non standarized experimental things
987
988 /**
989 * qscale offset between ip and b frames.
990 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
991 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
992 * - encoding: set by user.
993 * - decoding: unused
994 */
995 float b_quant_offset;
996
997 /**
998 * error resilience higher values will detect more errors but may missdetect
999 * some more or less valid parts as errors.
1000 * - encoding: unused
1001 * - decoding: set by user
1002 */
1003 int error_resilience;
1004 #define FF_ER_CAREFULL 1
1005 #define FF_ER_COMPLIANT 2
1006 #define FF_ER_AGGRESSIVE 3
1007 #define FF_ER_VERY_AGGRESSIVE 4
1008
1009 /**
1010 * called at the beginning of each frame to get a buffer for it.
1011 * if pic.reference is set then the frame will be read later by lavc
1012 * avcodec_align_dimensions() should be used to find the required width and
1013 * height, as they normally need to be rounded up to the next multiple of 16
1014 * - encoding: unused
1015 * - decoding: set by lavc, user can override
1016 */
1017 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1018
1019 /**
1020 * called to release buffers which where allocated with get_buffer.
1021 * a released buffer can be reused in get_buffer()
1022 * pic.data[*] must be set to NULL
1023 * - encoding: unused
1024 * - decoding: set by lavc, user can override
1025 */
1026 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1027
1028 /**
1029 * if 1 the stream has a 1 frame delay during decoding.
1030 * - encoding: set by lavc
1031 * - decoding: set by lavc
1032 */
1033 int has_b_frames;
1034
1035 /**
1036 * number of bytes per packet if constant and known or 0
1037 * used by some WAV based audio codecs
1038 */
1039 int block_align;
1040
1041 int parse_only; /* - decoding only: if true, only parsing is done
1042 (function avcodec_parse_frame()). The frame
1043 data is returned. Only MPEG codecs support this now. */
1044
1045 /**
1046 * 0-> h263 quant 1-> mpeg quant.
1047 * - encoding: set by user.
1048 * - decoding: unused
1049 */
1050 int mpeg_quant;
1051
1052 /**
1053 * pass1 encoding statistics output buffer.
1054 * - encoding: set by lavc
1055 * - decoding: unused
1056 */
1057 char *stats_out;
1058
1059 /**
1060 * pass2 encoding statistics input buffer.
1061 * concatenated stuff from stats_out of pass1 should be placed here
1062 * - encoding: allocated/set/freed by user
1063 * - decoding: unused
1064 */
1065 char *stats_in;
1066
1067 /**
1068 * ratecontrol qmin qmax limiting method.
1069 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
1070 * - encoding: set by user.
1071 * - decoding: unused
1072 */
1073 float rc_qsquish;
1074
1075 float rc_qmod_amp;
1076 int rc_qmod_freq;
1077
1078 /**
1079 * ratecontrol override, see RcOverride.
1080 * - encoding: allocated/set/freed by user.
1081 * - decoding: unused
1082 */
1083 RcOverride *rc_override;
1084 int rc_override_count;
1085
1086 /**
1087 * rate control equation.
1088 * - encoding: set by user
1089 * - decoding: unused
1090 */
1091 char *rc_eq;
1092
1093 /**
1094 * maximum bitrate.
1095 * - encoding: set by user.
1096 * - decoding: unused
1097 */
1098 int rc_max_rate;
1099
1100 /**
1101 * minimum bitrate.
1102 * - encoding: set by user.
1103 * - decoding: unused
1104 */
1105 int rc_min_rate;
1106
1107 /**
1108 * decoder bitstream buffer size.
1109 * - encoding: set by user.
1110 * - decoding: unused
1111 */
1112 int rc_buffer_size;
1113 float rc_buffer_aggressivity;
1114
1115 /**
1116 * qscale factor between p and i frames.
1117 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1118 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1119 * - encoding: set by user.
1120 * - decoding: unused
1121 */
1122 float i_quant_factor;
1123
1124 /**
1125 * qscale offset between p and i frames.
1126 * - encoding: set by user.
1127 * - decoding: unused
1128 */
1129 float i_quant_offset;
1130
1131 /**
1132 * initial complexity for pass1 ratecontrol.
1133 * - encoding: set by user.
1134 * - decoding: unused
1135 */
1136 float rc_initial_cplx;
1137
1138 /**
1139 * dct algorithm, see FF_DCT_* below.
1140 * - encoding: set by user
1141 * - decoding: unused
1142 */
1143 int dct_algo;
1144 #define FF_DCT_AUTO 0
1145 #define FF_DCT_FASTINT 1
1146 #define FF_DCT_INT 2
1147 #define FF_DCT_MMX 3
1148 #define FF_DCT_MLIB 4
1149 #define FF_DCT_ALTIVEC 5
1150 #define FF_DCT_FAAN 6
1151
1152 /**
1153 * luminance masking (0-> disabled).
1154 * - encoding: set by user
1155 * - decoding: unused
1156 */
1157 float lumi_masking;
1158
1159 /**
1160 * temporary complexity masking (0-> disabled).
1161 * - encoding: set by user
1162 * - decoding: unused
1163 */
1164 float temporal_cplx_masking;
1165
1166 /**
1167 * spatial complexity masking (0-> disabled).
1168 * - encoding: set by user
1169 * - decoding: unused
1170 */
1171 float spatial_cplx_masking;
1172
1173 /**
1174 * p block masking (0-> disabled).
1175 * - encoding: set by user
1176 * - decoding: unused
1177 */
1178 float p_masking;
1179
1180 /**
1181 * darkness masking (0-> disabled).
1182 * - encoding: set by user
1183 * - decoding: unused
1184 */
1185 float dark_masking;
1186
1187
1188 /* for binary compatibility */
1189 int unused;
1190
1191 /**
1192 * idct algorithm, see FF_IDCT_* below.
1193 * - encoding: set by user
1194 * - decoding: set by user
1195 */
1196 int idct_algo;
1197 #define FF_IDCT_AUTO 0
1198 #define FF_IDCT_INT 1
1199 #define FF_IDCT_SIMPLE 2
1200 #define FF_IDCT_SIMPLEMMX 3
1201 #define FF_IDCT_LIBMPEG2MMX 4
1202 #define FF_IDCT_PS2 5
1203 #define FF_IDCT_MLIB 6
1204 #define FF_IDCT_ARM 7
1205 #define FF_IDCT_ALTIVEC 8
1206 #define FF_IDCT_SH4 9
1207 #define FF_IDCT_SIMPLEARM 10
1208 #define FF_IDCT_H264 11
1209 #define FF_IDCT_VP3 12
1210 #define FF_IDCT_IPP 13
1211
1212 /**
1213 * slice count.
1214 * - encoding: set by lavc
1215 * - decoding: set by user (or 0)
1216 */
1217 int slice_count;
1218 /**
1219 * slice offsets in the frame in bytes.
1220 * - encoding: set/allocated by lavc
1221 * - decoding: set/allocated by user (or NULL)
1222 */
1223 int *slice_offset;
1224
1225 /**
1226 * error concealment flags.
1227 * - encoding: unused
1228 * - decoding: set by user
1229 */
1230 int error_concealment;
1231 #define FF_EC_GUESS_MVS 1
1232 #define FF_EC_DEBLOCK 2
1233
1234 /**
1235 * dsp_mask could be add used to disable unwanted CPU features
1236 * CPU features (i.e. MMX, SSE. ...)
1237 *
1238 * with FORCE flag you may instead enable given CPU features
1239 * (Dangerous: usable in case of misdetection, improper usage however will
1240 * result into program crash)
1241 */
1242 unsigned dsp_mask;
1243 #define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
1244 /* lower 16 bits - CPU features */
1245 #ifdef HAVE_MMX
1246 #define FF_MM_MMX 0x0001 /* standard MMX */
1247 #define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
1248 #define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
1249 #define FF_MM_SSE 0x0008 /* SSE functions */
1250 #define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
1251 #define FF_MM_3DNOWEXT 0x0020 /* AMD 3DNowExt */
1252 #endif /* HAVE_MMX */
1253 #ifdef HAVE_IWMMXT
1254 #define FF_MM_IWMMXT 0x0100 /* XScale IWMMXT */
1255 #endif /* HAVE_IWMMXT */
1256
1257 /**
1258 * bits per sample/pixel from the demuxer (needed for huffyuv).
1259 * - encoding: set by lavc
1260 * - decoding: set by user
1261 */
1262 int bits_per_sample;
1263
1264 /**
1265 * prediction method (needed for huffyuv).
1266 * - encoding: set by user
1267 * - decoding: unused
1268 */
1269 int prediction_method;
1270 #define FF_PRED_LEFT 0
1271 #define FF_PRED_PLANE 1
1272 #define FF_PRED_MEDIAN 2
1273
1274 /**
1275 * sample aspect ratio (0 if unknown).
1276 * numerator and denominator must be relative prime and smaller then 256 for some video standards
1277 * - encoding: set by user.
1278 * - decoding: set by lavc.
1279 */
1280 AVRational sample_aspect_ratio;
1281
1282 /**
1283 * the picture in the bitstream.
1284 * - encoding: set by lavc
1285 * - decoding: set by lavc
1286 */
1287 AVFrame *coded_frame;
1288
1289 /**
1290 * debug.
1291 * - encoding: set by user.
1292 * - decoding: set by user.
1293 */
1294 int debug;
1295 #define FF_DEBUG_PICT_INFO 1
1296 #define FF_DEBUG_RC 2
1297 #define FF_DEBUG_BITSTREAM 4
1298 #define FF_DEBUG_MB_TYPE 8
1299 #define FF_DEBUG_QP 16
1300 #define FF_DEBUG_MV 32
1301 #define FF_DEBUG_DCT_COEFF 0x00000040
1302 #define FF_DEBUG_SKIP 0x00000080
1303 #define FF_DEBUG_STARTCODE 0x00000100
1304 #define FF_DEBUG_PTS 0x00000200
1305 #define FF_DEBUG_ER 0x00000400
1306 #define FF_DEBUG_MMCO 0x00000800
1307 #define FF_DEBUG_BUGS 0x00001000
1308 #define FF_DEBUG_VIS_QP 0x00002000
1309 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1310
1311 /**
1312 * debug.
1313 * - encoding: set by user.
1314 * - decoding: set by user.
1315 */
1316 int debug_mv;
1317 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1318 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1319 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1320
1321 /**
1322 * error.
1323 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1324 * - decoding: unused
1325 */
1326 uint64_t error[4];
1327
1328 /**
1329 * minimum MB quantizer.
1330 * - encoding: unused
1331 * - decoding: unused
1332 */
1333 int mb_qmin;
1334
1335 /**
1336 * maximum MB quantizer.
1337 * - encoding: unused
1338 * - decoding: unused
1339 */
1340 int mb_qmax;
1341
1342 /**
1343 * motion estimation compare function.
1344 * - encoding: set by user.
1345 * - decoding: unused
1346 */
1347 int me_cmp;
1348 /**
1349 * subpixel motion estimation compare function.
1350 * - encoding: set by user.
1351 * - decoding: unused
1352 */
1353 int me_sub_cmp;
1354 /**
1355 * macroblock compare function (not supported yet).
1356 * - encoding: set by user.
1357 * - decoding: unused
1358 */
1359 int mb_cmp;
1360 /**
1361 * interlaced dct compare function
1362 * - encoding: set by user.
1363 * - decoding: unused
1364 */
1365 int ildct_cmp;
1366 #define FF_CMP_SAD 0
1367 #define FF_CMP_SSE 1
1368 #define FF_CMP_SATD 2
1369 #define FF_CMP_DCT 3
1370 #define FF_CMP_PSNR 4
1371 #define FF_CMP_BIT 5
1372 #define FF_CMP_RD 6
1373 #define FF_CMP_ZERO 7
1374 #define FF_CMP_VSAD 8
1375 #define FF_CMP_VSSE 9
1376 #define FF_CMP_NSSE 10
1377 #define FF_CMP_W53 11
1378 #define FF_CMP_W97 12
1379 #define FF_CMP_DCTMAX 13
1380 #define FF_CMP_CHROMA 256
1381
1382 /**
1383 * ME diamond size & shape.
1384 * - encoding: set by user.
1385 * - decoding: unused
1386 */
1387 int dia_size;
1388
1389 /**
1390 * amount of previous MV predictors (2a+1 x 2a+1 square).
1391 * - encoding: set by user.
1392 * - decoding: unused
1393 */
1394 int last_predictor_count;
1395
1396 /**
1397 * pre pass for motion estimation.
1398 * - encoding: set by user.
1399 * - decoding: unused
1400 */
1401 int pre_me;
1402
1403 /**
1404 * motion estimation pre pass compare function.
1405 * - encoding: set by user.
1406 * - decoding: unused
1407 */
1408 int me_pre_cmp;
1409
1410 /**
1411 * ME pre pass diamond size & shape.
1412 * - encoding: set by user.
1413 * - decoding: unused
1414 */
1415 int pre_dia_size;
1416
1417 /**
1418 * subpel ME quality.
1419 * - encoding: set by user.
1420 * - decoding: unused
1421 */
1422 int me_subpel_quality;
1423
1424 /**
1425 * callback to negotiate the pixelFormat.
1426 * @param fmt is the list of formats which are supported by the codec,
1427 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1428 * the first is allways the native one
1429 * @return the choosen format
1430 * - encoding: unused
1431 * - decoding: set by user, if not set then the native format will always be choosen
1432 */
1433 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1434
1435 /**
1436 * DTG active format information (additionnal aspect ratio
1437 * information only used in DVB MPEG2 transport streams). 0 if
1438 * not set.
1439 *
1440 * - encoding: unused.
1441 * - decoding: set by decoder
1442 */
1443 int dtg_active_format;
1444 #define FF_DTG_AFD_SAME 8
1445 #define FF_DTG_AFD_4_3 9
1446 #define FF_DTG_AFD_16_9 10
1447 #define FF_DTG_AFD_14_9 11
1448 #define FF_DTG_AFD_4_3_SP_14_9 13
1449 #define FF_DTG_AFD_16_9_SP_14_9 14
1450 #define FF_DTG_AFD_SP_4_3 15
1451
1452 /**
1453 * Maximum motion estimation search range in subpel units.
1454 * if 0 then no limit
1455 *
1456 * - encoding: set by user.
1457 * - decoding: unused.
1458 */
1459 int me_range;
1460
1461 /**
1462 * intra quantizer bias.
1463 * - encoding: set by user.
1464 * - decoding: unused
1465 */
1466 int intra_quant_bias;
1467 #define FF_DEFAULT_QUANT_BIAS 999999
1468
1469 /**
1470 * inter quantizer bias.
1471 * - encoding: set by user.
1472 * - decoding: unused
1473 */
1474 int inter_quant_bias;
1475
1476 /**
1477 * color table ID.
1478 * - encoding: unused.
1479 * - decoding: which clrtable should be used for 8bit RGB images
1480 * table have to be stored somewhere FIXME
1481 */
1482 int color_table_id;
1483
1484 /**
1485 * internal_buffer count.
1486 * Don't touch, used by lavc default_get_buffer()
1487 */
1488 int internal_buffer_count;
1489
1490 /**
1491 * internal_buffers.
1492 * Don't touch, used by lavc default_get_buffer()
1493 */
1494 void *internal_buffer;
1495
1496 #define FF_LAMBDA_SHIFT 7
1497 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1498 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1499 #define FF_LAMBDA_MAX (256*128-1)
1500
1501 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1502 /**
1503 * global quality for codecs which cannot change it per frame.
1504 * this should be proportional to MPEG1/2/4 qscale.
1505 * - encoding: set by user.
1506 * - decoding: unused
1507 */
1508 int global_quality;
1509
1510 #define FF_CODER_TYPE_VLC 0
1511 #define FF_CODER_TYPE_AC 1
1512 /**
1513 * coder type
1514 * - encoding: set by user.
1515 * - decoding: unused
1516 */
1517 int coder_type;
1518
1519 /**
1520 * context model
1521 * - encoding: set by user.
1522 * - decoding: unused
1523 */
1524 int context_model;
1525
1526 /**
1527 * slice flags
1528 * - encoding: unused
1529 * - decoding: set by user.
1530 */
1531 int slice_flags;
1532 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1533 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1534 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1535
1536 /**
1537 * XVideo Motion Acceleration
1538 * - encoding: forbidden
1539 * - decoding: set by decoder
1540 */
1541 int xvmc_acceleration;
1542
1543 /**
1544 * macroblock decision mode
1545 * - encoding: set by user.
1546 * - decoding: unused
1547 */
1548 int mb_decision;
1549 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1550 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1551 #define FF_MB_DECISION_RD 2 ///< rate distoration
1552
1553 /**
1554 * custom intra quantization matrix
1555 * - encoding: set by user, can be NULL
1556 * - decoding: set by lavc
1557 */
1558 uint16_t *intra_matrix;
1559
1560 /**
1561 * custom inter quantization matrix
1562 * - encoding: set by user, can be NULL
1563 * - decoding: set by lavc
1564 */
1565 uint16_t *inter_matrix;
1566
1567 /**
1568 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1569 * this is used to workaround some encoder bugs
1570 * - encoding: unused
1571 * - decoding: set by user, will be converted to upper case by lavc during init
1572 */
1573 unsigned int stream_codec_tag;
1574
1575 /**
1576 * scene change detection threshold.
1577 * 0 is default, larger means fewer detected scene changes
1578 * - encoding: set by user.
1579 * - decoding: unused
1580 */
1581 int scenechange_threshold;
1582
1583 /**
1584 * minimum lagrange multipler
1585 * - encoding: set by user.
1586 * - decoding: unused
1587 */
1588 int lmin;
1589
1590 /**
1591 * maximum lagrange multipler
1592 * - encoding: set by user.
1593 * - decoding: unused
1594 */
1595 int lmax;
1596
1597 /**
1598 * Palette control structure
1599 * - encoding: ??? (no palette-enabled encoder yet)
1600 * - decoding: set by user.
1601 */
1602 struct AVPaletteControl *palctrl;
1603
1604 /**
1605 * noise reduction strength
1606 * - encoding: set by user.
1607 * - decoding: unused
1608 */
1609 int noise_reduction;
1610
1611 /**
1612 * called at the beginning of a frame to get cr buffer for it.
1613 * buffer type (size, hints) must be the same. lavc won't check it.
1614 * lavc will pass previous buffer in pic, function should return
1615 * same buffer or new buffer with old frame "painted" into it.
1616 * if pic.data[0] == NULL must behave like get_buffer().
1617 * - encoding: unused
1618 * - decoding: set by lavc, user can override
1619 */
1620 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1621
1622 /**
1623 * number of bits which should be loaded into the rc buffer before decoding starts
1624 * - encoding: set by user.
1625 * - decoding: unused
1626 */
1627 int rc_initial_buffer_occupancy;
1628
1629 /**
1630 *
1631 * - encoding: set by user.
1632 * - decoding: unused
1633 */
1634 int inter_threshold;
1635
1636 /**
1637 * CODEC_FLAG2_*.
1638 * - encoding: set by user.
1639 * - decoding: set by user.
1640 */
1641 int flags2;
1642
1643 /**
1644 * simulates errors in the bitstream to test error concealment.
1645 * - encoding: set by user.
1646 * - decoding: unused.
1647 */
1648 int error_rate;
1649
1650 /**
1651 * MP3 antialias algorithm, see FF_AA_* below.
1652 * - encoding: unused
1653 * - decoding: set by user
1654 */
1655 int antialias_algo;
1656 #define FF_AA_AUTO 0
1657 #define FF_AA_FASTINT 1 //not implemented yet
1658 #define FF_AA_INT 2
1659 #define FF_AA_FLOAT 3
1660 /**
1661 * Quantizer noise shaping.
1662 * - encoding: set by user
1663 * - decoding: unused
1664 */
1665 int quantizer_noise_shaping;
1666
1667 /**
1668 * Thread count.
1669 * is used to decide how many independant tasks should be passed to execute()
1670 * - encoding: set by user
1671 * - decoding: set by user
1672 */
1673 int thread_count;
1674
1675 /**
1676 * the codec may call this to execute several independant things. it will return only after
1677 * finishing all tasks, the user may replace this with some multithreaded implementation, the
1678 * default implementation will execute the parts serially
1679 * @param count the number of things to execute
1680 * - encoding: set by lavc, user can override
1681 * - decoding: set by lavc, user can override
1682 */
1683 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1684
1685 /**
1686 * Thread opaque.
1687 * can be used by execute() to store some per AVCodecContext stuff.
1688 * - encoding: set by execute()
1689 * - decoding: set by execute()
1690 */
1691 void *thread_opaque;
1692
1693 /**
1694 * Motion estimation threshold. under which no motion estimation is
1695 * performed, but instead the user specified motion vectors are used
1696 *
1697 * - encoding: set by user
1698 * - decoding: unused
1699 */
1700 int me_threshold;
1701
1702 /**
1703 * Macroblock threshold. under which the user specified macroblock types will be used
1704 * - encoding: set by user
1705 * - decoding: unused
1706 */
1707 int mb_threshold;
1708
1709 /**
1710 * precision of the intra dc coefficient - 8.
1711 * - encoding: set by user
1712 * - decoding: unused
1713 */
1714 int intra_dc_precision;
1715
1716 /**
1717 * noise vs. sse weight for the nsse comparsion function.
1718 * - encoding: set by user
1719 * - decoding: unused
1720 */
1721 int nsse_weight;
1722
1723 /**
1724 * number of macroblock rows at the top which are skipped.
1725 * - encoding: unused
1726 * - decoding: set by user
1727 */
1728 int skip_top;
1729
1730 /**
1731 * number of macroblock rows at the bottom which are skipped.
1732 * - encoding: unused
1733 * - decoding: set by user
1734 */
1735 int skip_bottom;
1736
1737 /**
1738 * profile
1739 * - encoding: set by user
1740 * - decoding: set by lavc
1741 */
1742 int profile;
1743 #define FF_PROFILE_UNKNOWN -99
1744
1745 /**
1746 * level
1747 * - encoding: set by user
1748 * - decoding: set by lavc
1749 */
1750 int level;
1751 #define FF_LEVEL_UNKNOWN -99
1752
1753 /**
1754 * low resolution decoding. 1-> 1/2 size, 2->1/4 size
1755 * - encoding: unused
1756 * - decoding: set by user
1757 */
1758 int lowres;
1759
1760 /**
1761 * bitsream width / height. may be different from width/height if lowres
1762 * or other things are used
1763 * - encoding: unused
1764 * - decoding: set by user before init if known, codec should override / dynamically change if needed
1765 */
1766 int coded_width, coded_height;
1767
1768 /**
1769 * frame skip threshold
1770 * - encoding: set by user
1771 * - decoding: unused
1772 */
1773 int frame_skip_threshold;
1774
1775 /**
1776 * frame skip factor
1777 * - encoding: set by user
1778 * - decoding: unused
1779 */
1780 int frame_skip_factor;
1781
1782 /**
1783 * frame skip exponent
1784 * - encoding: set by user
1785 * - decoding: unused
1786 */
1787 int frame_skip_exp;
1788
1789 /**
1790 * frame skip comparission function
1791 * - encoding: set by user.
1792 * - decoding: unused
1793 */
1794 int frame_skip_cmp;
1795
1796 /**
1797 * border processing masking. raises the quantizer for mbs on the borders
1798 * of the picture.
1799 * - encoding: set by user
1800 * - decoding: unused
1801 */
1802 float border_masking;
1803
1804 /**
1805 * minimum MB lagrange multipler.
1806 * - encoding: set by user.
1807 * - decoding: unused
1808 */
1809 int mb_lmin;
1810
1811 /**
1812 * maximum MB lagrange multipler.
1813 * - encoding: set by user.
1814 * - decoding: unused
1815 */
1816 int mb_lmax;
1817
1818 /**
1819 *
1820 * - encoding: set by user.
1821 * - decoding: unused
1822 */
1823 int me_penalty_compensation;
1824
1825 /**
1826 *
1827 * - encoding: unused
1828 * - decoding: set by user.
1829 */
1830 enum AVDiscard skip_loop_filter;
1831
1832 /**
1833 *
1834 * - encoding: unused
1835 * - decoding: set by user.
1836 */
1837 enum AVDiscard skip_idct;
1838
1839 /**
1840 *
1841 * - encoding: unused
1842 * - decoding: set by user.
1843 */
1844 enum AVDiscard skip_frame;
1845 } AVCodecContext;
1846
1847
1848 /**
1849 * AVOption.
1850 */
1851 typedef struct AVOption {
1852 /** options' name */
1853 const char *name; /* if name is NULL, it indicates a link to next */
1854 /** short English text help or const struct AVOption* subpointer */
1855 const char *help; // const struct AVOption* sub;
1856 /** offset to context structure where the parsed value should be stored */
1857 int offset;
1858 /** options' type */
1859 int type;
1860 #define FF_OPT_TYPE_BOOL 1 ///< boolean - true,1,on (or simply presence)
1861 #define FF_OPT_TYPE_DOUBLE 2 ///< double
1862 #define FF_OPT_TYPE_INT 3 ///< integer
1863 #define FF_OPT_TYPE_STRING 4 ///< string (finished with \0)
1864 #define FF_OPT_TYPE_MASK 0x1f ///< mask for types - upper bits are various flags
1865 //#define FF_OPT_TYPE_EXPERT 0x20 // flag for expert option
1866 #define FF_OPT_TYPE_FLAG (FF_OPT_TYPE_BOOL | 0x40)
1867 #define FF_OPT_TYPE_RCOVERRIDE (FF_OPT_TYPE_STRING | 0x80)
1868 /** min value (min == max -> no limits) */
1869 double min;
1870 /** maximum value for double/int */
1871 double max;
1872 /** default boo [0,1]l/double/int value */
1873 double defval;
1874 /**
1875 * default string value (with optional semicolon delimited extra option-list
1876 * i.e. option1;option2;option3
1877 * defval might select other then first argument as default
1878 */
1879 const char *defstr;
1880 #define FF_OPT_MAX_DEPTH 10
1881 } AVOption;
1882
1883 /**
1884 * AVCodec.
1885 */
1886 typedef struct AVCodec {
1887 const char *name;
1888 enum CodecType type;
1889 enum CodecID id;
1890 int priv_data_size;
1891 int (*init)(AVCodecContext *);
1892 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
1893 int (*close)(AVCodecContext *);
1894 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
1895 uint8_t *buf, int buf_size);
1896 int capabilities;
1897 void *dummy; // FIXME remove next time we break binary compatibility
1898 struct AVCodec *next;
1899 void (*flush)(AVCodecContext *);
1900 const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
1901 const enum PixelFormat *pix_fmts; ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
1902 } AVCodec;
1903
1904 /**
1905 * four components are given, that's all.
1906 * the last component is alpha
1907 */
1908 typedef struct AVPicture {
1909 uint8_t *data[4];
1910 int linesize[4]; ///< number of bytes per line
1911 } AVPicture;
1912
1913 /**
1914 * AVPaletteControl
1915 * This structure defines a method for communicating palette changes
1916 * between and demuxer and a decoder.
1917 */
1918 #define AVPALETTE_SIZE 1024
1919 #define AVPALETTE_COUNT 256
1920 typedef struct AVPaletteControl {
1921
1922 /* demuxer sets this to 1 to indicate the palette has changed;
1923 * decoder resets to 0 */
1924 int palette_changed;
1925
1926 /* 4-byte ARGB palette entries, stored in native byte order; note that
1927 * the individual palette components should be on a 8-bit scale; if
1928 * the palette data comes from a IBM VGA native format, the component
1929 * data is probably 6 bits in size and needs to be scaled */
1930 unsigned int palette[AVPALETTE_COUNT];
1931
1932 } AVPaletteControl;
1933
1934 typedef struct AVSubtitleRect {
1935 uint16_t x;
1936 uint16_t y;
1937 uint16_t w;
1938 uint16_t h;
1939 uint16_t nb_colors;
1940 int linesize;
1941 uint32_t *rgba_palette;
1942 uint8_t *bitmap;
1943 } AVSubtitleRect;
1944
1945 typedef struct AVSubtitle {
1946 uint16_t format; /* 0 = graphics */
1947 uint32_t start_display_time; /* relative to packet pts, in ms */
1948 uint32_t end_display_time; /* relative to packet pts, in ms */
1949 uint32_t num_rects;
1950 AVSubtitleRect *rects;
1951 } AVSubtitle;
1952
1953 extern AVCodec ac3_encoder;
1954 extern AVCodec mp2_encoder;
1955 extern AVCodec mp3lame_encoder;
1956 extern AVCodec oggvorbis_encoder;
1957 extern AVCodec oggtheora_encoder;
1958 extern AVCodec faac_encoder;
1959 extern AVCodec xvid_encoder;
1960 extern AVCodec mpeg1video_encoder;
1961 extern AVCodec mpeg2video_encoder;
1962 extern AVCodec h261_encoder;
1963 extern AVCodec h263_encoder;
1964 extern AVCodec h263p_encoder;
1965 extern AVCodec flv_encoder;
1966 extern AVCodec rv10_encoder;
1967 extern AVCodec rv20_encoder;
1968 extern AVCodec dvvideo_encoder;
1969 extern AVCodec mjpeg_encoder;
1970 extern AVCodec ljpeg_encoder;
1971 extern AVCodec png_encoder;
1972 extern AVCodec ppm_encoder;
1973 extern AVCodec pgm_encoder;
1974 extern AVCodec pgmyuv_encoder;
1975 extern AVCodec pbm_encoder;
1976 extern AVCodec pam_encoder;
1977 extern AVCodec mpeg4_encoder;
1978 extern AVCodec msmpeg4v1_encoder;
1979 extern AVCodec msmpeg4v2_encoder;
1980 extern AVCodec msmpeg4v3_encoder;
1981 extern AVCodec wmv1_encoder;
1982 extern AVCodec wmv2_encoder;
1983 extern AVCodec huffyuv_encoder;
1984 extern AVCodec ffvhuff_encoder;
1985 extern AVCodec h264_encoder;
1986 extern AVCodec asv1_encoder;
1987 extern AVCodec asv2_encoder;
1988 extern AVCodec vcr1_encoder;
1989 extern AVCodec ffv1_encoder;
1990 extern AVCodec snow_encoder;
1991 extern AVCodec mdec_encoder;
1992 extern AVCodec zlib_encoder;
1993 extern AVCodec sonic_encoder;
1994 extern AVCodec sonic_ls_encoder;
1995 extern AVCodec svq1_encoder;
1996 extern AVCodec x264_encoder;
1997
1998 extern AVCodec h263_decoder;
1999 extern AVCodec h261_decoder;
2000 extern AVCodec mpeg4_decoder;
2001 extern AVCodec msmpeg4v1_decoder;
2002 extern AVCodec msmpeg4v2_decoder;
2003 extern AVCodec msmpeg4v3_decoder;
2004 extern AVCodec wmv1_decoder;
2005 extern AVCodec wmv2_decoder;
2006 extern AVCodec vc9_decoder;
2007 extern AVCodec wmv3_decoder;
2008 extern AVCodec mpeg1video_decoder;
2009 extern AVCodec mpeg2video_decoder;
2010 extern AVCodec mpegvideo_decoder;
2011 extern AVCodec mpeg_xvmc_decoder;
2012 extern AVCodec h263i_decoder;
2013 extern AVCodec flv_decoder;
2014 extern AVCodec rv10_decoder;
2015 extern AVCodec rv20_decoder;
2016 extern AVCodec rv30_decoder;
2017 extern AVCodec rv40_decoder;
2018 extern AVCodec svq1_decoder;
2019 extern AVCodec svq3_decoder;
2020 extern AVCodec dvvideo_decoder;
2021 extern AVCodec wmav1_decoder;
2022 extern AVCodec wmav2_decoder;
2023 extern AVCodec mjpeg_decoder;
2024 extern AVCodec mjpegb_decoder;
2025 extern AVCodec sp5x_decoder;
2026 extern AVCodec png_decoder;
2027 extern AVCodec mp2_decoder;
2028 extern AVCodec mp3_decoder;
2029 extern AVCodec mp3adu_decoder;
2030 extern AVCodec mp3on4_decoder;
2031 extern AVCodec mace3_decoder;
2032 extern AVCodec mace6_decoder;
2033 extern AVCodec huffyuv_decoder;
2034 extern AVCodec ffvhuff_decoder;
2035 extern AVCodec oggvorbis_decoder;
2036 extern AVCodec oggtheora_decoder;
2037 extern AVCodec cyuv_decoder;
2038 extern AVCodec h264_decoder;
2039 extern AVCodec indeo3_decoder;
2040 extern AVCodec vp3_decoder;
2041 extern AVCodec theora_decoder;
2042 extern AVCodec amr_nb_decoder;
2043 extern AVCodec amr_nb_encoder;
2044 extern AVCodec amr_wb_encoder;
2045 extern AVCodec amr_wb_decoder;
2046 extern AVCodec aac_decoder;
2047 extern AVCodec mpeg4aac_decoder;
2048 extern AVCodec asv1_decoder;
2049 extern AVCodec asv2_decoder;
2050 extern AVCodec vcr1_decoder;
2051 extern AVCodec cljr_decoder;
2052 extern AVCodec ffv1_decoder;
2053 extern AVCodec snow_decoder;
2054 extern AVCodec fourxm_decoder;
2055 extern AVCodec mdec_decoder;
2056 extern AVCodec roq_decoder;
2057 extern AVCodec interplay_video_decoder;
2058 extern AVCodec xan_wc3_decoder;
2059 extern AVCodec rpza_decoder;
2060 extern AVCodec cinepak_decoder;
2061 extern AVCodec msrle_decoder;
2062 extern AVCodec msvideo1_decoder;
2063 extern AVCodec vqa_decoder;
2064 extern AVCodec idcin_decoder;
2065 extern AVCodec eightbps_decoder;
2066 extern AVCodec smc_decoder;
2067 extern AVCodec flic_decoder;
2068 extern AVCodec vmdvideo_decoder;
2069 extern AVCodec vmdaudio_decoder;
2070 extern AVCodec truemotion1_decoder;
2071 extern AVCodec mszh_decoder;
2072 extern AVCodec zlib_decoder;
2073 extern AVCodec ra_144_decoder;
2074 extern AVCodec ra_288_decoder;
2075 extern AVCodec roq_dpcm_decoder;
2076 extern AVCodec interplay_dpcm_decoder;
2077 extern AVCodec xan_dpcm_decoder;
2078 extern AVCodec sol_dpcm_decoder;
2079 extern AVCodec sonic_decoder;
2080 extern AVCodec qtrle_decoder;
2081 extern AVCodec flac_decoder;
2082 extern AVCodec tscc_decoder;
2083 extern AVCodec ulti_decoder;
2084 extern AVCodec qdraw_decoder;
2085 extern AVCodec xl_decoder;
2086 extern AVCodec qpeg_decoder;
2087 extern AVCodec shorten_decoder;
2088 extern AVCodec loco_decoder;
2089 extern AVCodec wnv1_decoder;
2090 extern AVCodec aasc_decoder;
2091 extern AVCodec alac_decoder;
2092 extern AVCodec ws_snd1_decoder;
2093 extern AVCodec indeo2_decoder;
2094 extern AVCodec vorbis_decoder;
2095 extern AVCodec fraps_decoder;
2096 extern AVCodec libgsm_encoder;
2097 extern AVCodec libgsm_decoder;
2098
2099 /* pcm codecs */
2100 #define PCM_CODEC(id, name) \
2101 extern AVCodec name ## _decoder; \
2102 extern AVCodec name ## _encoder
2103
2104 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
2105 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
2106 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
2107 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
2108 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
2109 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
2110 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
2111 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
2112
2113 /* adpcm codecs */
2114
2115 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
2116 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
2117 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
2118 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
2119 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
2120 PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
2121 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
2122 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
2123 PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
2124 PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
2125 PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
2126 PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
2127 PCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
2128 PCM_CODEC(CODEC_ID_ADPCM_SWF, adpcm_swf);
2129 PCM_CODEC(CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha);
2130
2131 #undef PCM_CODEC
2132
2133 /* dummy raw video codec */
2134 extern AVCodec rawvideo_encoder;
2135 extern AVCodec rawvideo_decoder;
2136
2137 /* the following codecs use external GPL libs */
2138 extern AVCodec ac3_decoder;
2139 extern AVCodec dts_decoder;
2140
2141 /* subtitles */
2142 extern AVCodec dvdsub_decoder;
2143 extern AVCodec dvbsub_encoder;
2144 extern AVCodec dvbsub_decoder;
2145
2146 /* resample.c */
2147
2148 struct ReSampleContext;
2149 struct AVResampleContext;
2150
2151 typedef struct ReSampleContext ReSampleContext;
2152
2153 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2154 int output_rate, int input_rate);
2155 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2156 void audio_resample_close(ReSampleContext *s);
2157
2158 struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2159 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2160 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2161 void av_resample_close(struct AVResampleContext *c);
2162
2163 /* YUV420 format is assumed ! */
2164
2165 struct ImgReSampleContext;
2166
2167 typedef struct ImgReSampleContext ImgReSampleContext;
2168
2169 ImgReSampleContext *img_resample_init(int output_width, int output_height,
2170 int input_width, int input_height);
2171
2172 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
2173 int iwidth, int iheight,
2174 int topBand, int bottomBand,
2175 int leftBand, int rightBand,
2176 int padtop, int padbottom,
2177 int padleft, int padright);
2178
2179
2180 void img_resample(ImgReSampleContext *s,
2181 AVPicture *output, const AVPicture *input);
2182
2183 void img_resample_close(ImgReSampleContext *s);
2184
2185 /**
2186 * Allocate memory for a picture. Call avpicture_free to free it.
2187 *
2188 * @param picture the picture to be filled in.
2189 * @param pix_fmt the format of the picture.
2190 * @param width the width of the picture.
2191 * @param height the height of the picture.
2192 * @return 0 if successful, -1 if not.
2193 */
2194 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2195
2196 /* Free a picture previously allocated by avpicture_alloc. */
2197 void avpicture_free(AVPicture *picture);
2198
2199 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2200 int pix_fmt, int width, int height);
2201 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2202 unsigned char *dest, int dest_size);
2203 int avpicture_get_size(int pix_fmt, int width, int height);
2204 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2205 const char *avcodec_get_pix_fmt_name(int pix_fmt);
2206 void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2207 enum PixelFormat avcodec_get_pix_fmt(const char* name);
2208 unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2209
2210 #define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
2211 #define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
2212 #define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
2213 #define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
2214 #define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
2215 #define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
2216
2217 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2218 int has_alpha);
2219 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2220 int has_alpha, int *loss_ptr);
2221
2222 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
2223 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
2224 int img_get_alpha_info(const AVPicture *src,
2225 int pix_fmt, int width, int height);
2226
2227 /* convert among pixel formats */
2228 int img_convert(AVPicture *dst, int dst_pix_fmt,
2229 const AVPicture *src, int pix_fmt,
2230 int width, int height);
2231
2232 /* deinterlace a picture */
2233 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2234 int pix_fmt, int width, int height);
2235
2236 /* external high level API */
2237
2238 extern AVCodec *first_avcodec;
2239
2240 /* returns LIBAVCODEC_VERSION_INT constant */
2241 unsigned avcodec_version(void);
2242 /* returns LIBAVCODEC_BUILD constant */
2243 unsigned avcodec_build(void);
2244 void avcodec_init(void);
2245
2246 void register_avcodec(AVCodec *format);
2247 AVCodec *avcodec_find_encoder(enum CodecID id);
2248 AVCodec *avcodec_find_encoder_by_name(const char *name);
2249 AVCodec *avcodec_find_decoder(enum CodecID id);
2250 AVCodec *avcodec_find_decoder_by_name(const char *name);
2251 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2252
2253 void avcodec_get_context_defaults(AVCodecContext *s);
2254 AVCodecContext *avcodec_alloc_context(void);
2255 void avcodec_get_frame_defaults(AVFrame *pic);
2256 AVFrame *avcodec_alloc_frame(void);
2257
2258 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2259 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2260 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2261 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2262 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2263 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2264
2265 int avcodec_thread_init(AVCodecContext *s, int thread_count);
2266 void avcodec_thread_free(AVCodecContext *s);
2267 int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2268 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2269 //FIXME func typedef
2270
2271 /**
2272 * opens / inits the AVCodecContext.
2273 * not thread save!
2274 */
2275 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2276
2277 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2278 int *frame_size_ptr,
2279 uint8_t *buf, int buf_size);
2280 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2281 int *got_picture_ptr,
2282 uint8_t *buf, int buf_size);
2283 int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
2284 int *got_sub_ptr,
2285 const uint8_t *buf, int buf_size);
2286 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2287 int *data_size_ptr,
2288 uint8_t *buf, int buf_size);
2289 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2290 const short *samples);
2291 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2292 const AVFrame *pict);
2293 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2294 const AVSubtitle *sub);
2295
2296 int avcodec_close(AVCodecContext *avctx);
2297
2298 void avcodec_register_all(void);
2299
2300 void avcodec_flush_buffers(AVCodecContext *avctx);
2301
2302 void avcodec_default_free_buffers(AVCodecContext *s);
2303
2304 /* misc usefull functions */
2305
2306 /**
2307 * returns a single letter to describe the picture type
2308 */
2309 char av_get_pict_type_char(int pict_type);
2310
2311 /**
2312 * reduce a fraction.
2313 * this is usefull for framerate calculations
2314 * @param max the maximum allowed for dst_nom & dst_den
2315 * @return 1 if exact, 0 otherwise
2316 */
2317 int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max);
2318
2319 /**
2320 * rescale a 64bit integer with rounding to nearest.
2321 * a simple a*b/c isn't possible as it can overflow
2322 */
2323 int64_t av_rescale(int64_t a, int64_t b, int64_t c);
2324
2325 /**
2326 * rescale a 64bit integer with specified rounding.
2327 * a simple a*b/c isn't possible as it can overflow
2328 */
2329 int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding);
2330
2331 /**
2332 * rescale a 64bit integer by 2 rational numbers.
2333 */
2334 int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq);
2335
2336 double av_int2dbl(int64_t v);
2337 float av_int2flt(int32_t v);
2338 int64_t av_dbl2int(double d);
2339 int32_t av_flt2int(float d);
2340
2341
2342 /* frame parsing */
2343 typedef struct AVCodecParserContext {
2344 void *priv_data;
2345 struct AVCodecParser *parser;
2346 int64_t frame_offset; /* offset of the current frame */
2347 int64_t cur_offset; /* current offset
2348 (incremented by each av_parser_parse()) */
2349 int64_t last_frame_offset; /* offset of the last frame */
2350 /* video info */
2351 int pict_type; /* XXX: put it back in AVCodecContext */
2352 int repeat_pict; /* XXX: put it back in AVCodecContext */
2353 int64_t pts; /* pts of the current frame */
2354 int64_t dts; /* dts of the current frame */
2355
2356 /* private data */
2357 int64_t last_pts;
2358 int64_t last_dts;
2359 int fetch_timestamp;
2360
2361 #define AV_PARSER_PTS_NB 4
2362 int cur_frame_start_index;
2363 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2364 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2365 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2366 } AVCodecParserContext;
2367
2368 typedef struct AVCodecParser {
2369 int codec_ids[5]; /* several codec IDs are permitted */
2370 int priv_data_size;
2371 int (*parser_init)(AVCodecParserContext *s);
2372 int (*parser_parse)(AVCodecParserContext *s,
2373 AVCodecContext *avctx,
2374 uint8_t **poutbuf, int *poutbuf_size,
2375 const uint8_t *buf, int buf_size);
2376 void (*parser_close)(AVCodecParserContext *s);
2377 int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
2378 struct AVCodecParser *next;
2379 } AVCodecParser;
2380
2381 extern AVCodecParser *av_first_parser;
2382
2383 void av_register_codec_parser(AVCodecParser *parser);
2384 AVCodecParserContext *av_parser_init(int codec_id);
2385 int av_parser_parse(AVCodecParserContext *s,
2386 AVCodecContext *avctx,
2387 uint8_t **poutbuf, int *poutbuf_size,
2388 const uint8_t *buf, int buf_size,
2389 int64_t pts, int64_t dts);
2390 int av_parser_change(AVCodecParserContext *s,
2391 AVCodecContext *avctx,
2392 uint8_t **poutbuf, int *poutbuf_size,
2393 const uint8_t *buf, int buf_size, int keyframe);
2394 void av_parser_close(AVCodecParserContext *s);
2395
2396 extern AVCodecParser mpegvideo_parser;
2397 extern AVCodecParser mpeg4video_parser;
2398 extern AVCodecParser h261_parser;
2399 extern AVCodecParser h263_parser;
2400 extern AVCodecParser h264_parser;
2401 extern AVCodecParser mjpeg_parser;
2402 extern AVCodecParser pnm_parser;
2403 extern AVCodecParser mpegaudio_parser;
2404 extern AVCodecParser ac3_parser;
2405 extern AVCodecParser dvdsub_parser;
2406 extern AVCodecParser dvbsub_parser;
2407
2408 /* memory */
2409 void *av_malloc(unsigned int size);
2410 void *av_mallocz(unsigned int size);
2411 void *av_realloc(void *ptr, unsigned int size);
2412 void av_free(void *ptr);
2413 char *av_strdup(const char *s);
2414 void av_freep(void *ptr);
2415 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2416 /* for static data only */
2417 /* call av_free_static to release all staticaly allocated tables */
2418 void av_free_static(void);
2419 void *av_mallocz_static(unsigned int size);
2420 void *av_realloc_static(void *ptr, unsigned int size);
2421
2422 /* add by bero : in adx.c */
2423 int is_adx(const unsigned char *buf,size_t bufsize);
2424
2425 void img_copy(AVPicture *dst, const AVPicture *src,
2426 int pix_fmt, int width, int height);
2427
2428 /* av_log API */
2429
2430 #include <stdarg.h>
2431
2432 #define AV_LOG_QUIET -1
2433 #define AV_LOG_ERROR 0
2434 #define AV_LOG_INFO 1
2435 #define AV_LOG_DEBUG 2
2436
2437 #ifdef __GNUC__
2438 extern void av_log(void*, int level, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 3, 4)));
2439 #else
2440 extern void av_log(void*, int level, const char *fmt, ...);
2441 #endif
2442
2443 extern void av_vlog(void*, int level, const char *fmt, va_list);
2444 extern int av_log_get_level(void);
2445 extern void av_log_set_level(int);
2446 extern void av_log_set_callback(void (*)(void*, int, const char*, va_list));
2447
2448 /* endian macros */
2449 #if !defined(BE_16) || !defined(BE_32) || !defined(LE_16) || !defined(LE_32)
2450 #define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
2451 #define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
2452 (((uint8_t*)(x))[1] << 16) | \
2453 (((uint8_t*)(x))[2] << 8) | \
2454 ((uint8_t*)(x))[3])
2455 #define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
2456 #define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \
2457 (((uint8_t*)(x))[2] << 16) | \
2458 (((uint8_t*)(x))[1] << 8) | \
2459 ((uint8_t*)(x))[0])
2460 #endif
2461
2462 extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
2463
2464 #ifdef __cplusplus
2465 }
2466 #endif
2467
2468 #endif /* AVCODEC_H */