7ca36f57712f2eca92250b9a3d1ff4429373fc06
[libav.git] / libavcodec / avcodec.h
1 #ifndef AVCODEC_H
2 #define AVCODEC_H
3
4 /**
5 * @file avcodec.h
6 * external api header.
7 */
8
9
10 #ifdef __cplusplus
11 extern "C" {
12 #endif
13
14 #include "avutil.h"
15 #include <sys/types.h> /* size_t */
16
17 //FIXME the following 2 really dont belong in here
18 #define FFMPEG_VERSION_INT 0x000409
19 #define FFMPEG_VERSION "CVS"
20
21 #define AV_STRINGIFY(s) AV_TOSTRING(s)
22 #define AV_TOSTRING(s) #s
23
24 #define LIBAVCODEC_VERSION_INT ((50<<16)+(0<<8)+0)
25 #define LIBAVCODEC_VERSION 50.0.0
26 #define LIBAVCODEC_BUILD LIBAVCODEC_VERSION_INT
27
28 #define LIBAVCODEC_IDENT "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
29
30 #define AV_NOPTS_VALUE int64_t_C(0x8000000000000000)
31 #define AV_TIME_BASE 1000000
32 #define AV_TIME_BASE_Q (AVRational){1, AV_TIME_BASE}
33
34 enum CodecID {
35 CODEC_ID_NONE,
36 CODEC_ID_MPEG1VIDEO,
37 CODEC_ID_MPEG2VIDEO, /* prefered ID for MPEG Video 1 or 2 decoding */
38 CODEC_ID_MPEG2VIDEO_XVMC,
39 CODEC_ID_H261,
40 CODEC_ID_H263,
41 CODEC_ID_RV10,
42 CODEC_ID_RV20,
43 CODEC_ID_MJPEG,
44 CODEC_ID_MJPEGB,
45 CODEC_ID_LJPEG,
46 CODEC_ID_SP5X,
47 CODEC_ID_MPEG4,
48 CODEC_ID_RAWVIDEO,
49 CODEC_ID_MSMPEG4V1,
50 CODEC_ID_MSMPEG4V2,
51 CODEC_ID_MSMPEG4V3,
52 CODEC_ID_WMV1,
53 CODEC_ID_WMV2,
54 CODEC_ID_H263P,
55 CODEC_ID_H263I,
56 CODEC_ID_FLV1,
57 CODEC_ID_SVQ1,
58 CODEC_ID_SVQ3,
59 CODEC_ID_DVVIDEO,
60 CODEC_ID_HUFFYUV,
61 CODEC_ID_CYUV,
62 CODEC_ID_H264,
63 CODEC_ID_INDEO3,
64 CODEC_ID_VP3,
65 CODEC_ID_THEORA,
66 CODEC_ID_ASV1,
67 CODEC_ID_ASV2,
68 CODEC_ID_FFV1,
69 CODEC_ID_4XM,
70 CODEC_ID_VCR1,
71 CODEC_ID_CLJR,
72 CODEC_ID_MDEC,
73 CODEC_ID_ROQ,
74 CODEC_ID_INTERPLAY_VIDEO,
75 CODEC_ID_XAN_WC3,
76 CODEC_ID_XAN_WC4,
77 CODEC_ID_RPZA,
78 CODEC_ID_CINEPAK,
79 CODEC_ID_WS_VQA,
80 CODEC_ID_MSRLE,
81 CODEC_ID_MSVIDEO1,
82 CODEC_ID_IDCIN,
83 CODEC_ID_8BPS,
84 CODEC_ID_SMC,
85 CODEC_ID_FLIC,
86 CODEC_ID_TRUEMOTION1,
87 CODEC_ID_VMDVIDEO,
88 CODEC_ID_MSZH,
89 CODEC_ID_ZLIB,
90 CODEC_ID_QTRLE,
91 CODEC_ID_SNOW,
92 CODEC_ID_TSCC,
93 CODEC_ID_ULTI,
94 CODEC_ID_QDRAW,
95 CODEC_ID_VIXL,
96 CODEC_ID_QPEG,
97 CODEC_ID_XVID,
98 CODEC_ID_PNG,
99 CODEC_ID_PPM,
100 CODEC_ID_PBM,
101 CODEC_ID_PGM,
102 CODEC_ID_PGMYUV,
103 CODEC_ID_PAM,
104 CODEC_ID_FFVHUFF,
105 CODEC_ID_RV30,
106 CODEC_ID_RV40,
107 CODEC_ID_VC9,
108 CODEC_ID_WMV3,
109 CODEC_ID_LOCO,
110 CODEC_ID_WNV1,
111 CODEC_ID_AASC,
112 CODEC_ID_INDEO2,
113 CODEC_ID_FRAPS,
114 CODEC_ID_TRUEMOTION2,
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 CODEC_ID_PCM_S32LE,
126 CODEC_ID_PCM_S32BE,
127 CODEC_ID_PCM_U32LE,
128 CODEC_ID_PCM_U32BE,
129 CODEC_ID_PCM_S24LE,
130 CODEC_ID_PCM_S24BE,
131 CODEC_ID_PCM_U24LE,
132 CODEC_ID_PCM_U24BE,
133 CODEC_ID_PCM_S24DAUD,
134
135 /* various adpcm codecs */
136 CODEC_ID_ADPCM_IMA_QT= 0x11000,
137 CODEC_ID_ADPCM_IMA_WAV,
138 CODEC_ID_ADPCM_IMA_DK3,
139 CODEC_ID_ADPCM_IMA_DK4,
140 CODEC_ID_ADPCM_IMA_WS,
141 CODEC_ID_ADPCM_IMA_SMJPEG,
142 CODEC_ID_ADPCM_MS,
143 CODEC_ID_ADPCM_4XM,
144 CODEC_ID_ADPCM_XA,
145 CODEC_ID_ADPCM_ADX,
146 CODEC_ID_ADPCM_EA,
147 CODEC_ID_ADPCM_G726,
148 CODEC_ID_ADPCM_CT,
149 CODEC_ID_ADPCM_SWF,
150 CODEC_ID_ADPCM_YAMAHA,
151
152 /* AMR */
153 CODEC_ID_AMR_NB= 0x12000,
154 CODEC_ID_AMR_WB,
155
156 /* RealAudio codecs*/
157 CODEC_ID_RA_144= 0x13000,
158 CODEC_ID_RA_288,
159
160 /* various DPCM codecs */
161 CODEC_ID_ROQ_DPCM= 0x14000,
162 CODEC_ID_INTERPLAY_DPCM,
163 CODEC_ID_XAN_DPCM,
164 CODEC_ID_SOL_DPCM,
165
166 CODEC_ID_MP2= 0x15000,
167 CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
168 CODEC_ID_AAC,
169 CODEC_ID_MPEG4AAC,
170 CODEC_ID_AC3,
171 CODEC_ID_DTS,
172 CODEC_ID_VORBIS,
173 CODEC_ID_DVAUDIO,
174 CODEC_ID_WMAV1,
175 CODEC_ID_WMAV2,
176 CODEC_ID_MACE3,
177 CODEC_ID_MACE6,
178 CODEC_ID_VMDAUDIO,
179 CODEC_ID_SONIC,
180 CODEC_ID_SONIC_LS,
181 CODEC_ID_FLAC,
182 CODEC_ID_MP3ADU,
183 CODEC_ID_MP3ON4,
184 CODEC_ID_SHORTEN,
185 CODEC_ID_ALAC,
186 CODEC_ID_WESTWOOD_SND1,
187 CODEC_ID_GSM,
188
189 CODEC_ID_OGGTHEORA= 0x16000,
190
191 /* subtitle codecs */
192 CODEC_ID_DVD_SUBTITLE= 0x17000,
193 CODEC_ID_DVB_SUBTITLE,
194
195 CODEC_ID_MPEG2TS= 0x20000, /* _FAKE_ codec to indicate a raw MPEG2 transport
196 stream (only used by libavformat) */
197 };
198
199 /* CODEC_ID_MP3LAME is absolete */
200 #define CODEC_ID_MP3LAME CODEC_ID_MP3
201
202 enum CodecType {
203 CODEC_TYPE_UNKNOWN = -1,
204 CODEC_TYPE_VIDEO,
205 CODEC_TYPE_AUDIO,
206 CODEC_TYPE_DATA,
207 CODEC_TYPE_SUBTITLE,
208 };
209
210 /**
211 * Pixel format. Notes:
212 *
213 * PIX_FMT_RGBA32 is handled in an endian-specific manner. A RGBA
214 * color is put together as:
215 * (A << 24) | (R << 16) | (G << 8) | B
216 * This is stored as BGRA on little endian CPU architectures and ARGB on
217 * big endian CPUs.
218 *
219 * When the pixel format is palettized RGB (PIX_FMT_PAL8), the palettized
220 * image data is stored in AVFrame.data[0]. The palette is transported in
221 * AVFrame.data[1] and, is 1024 bytes long (256 4-byte entries) and is
222 * formatted the same as in PIX_FMT_RGBA32 described above (i.e., it is
223 * also endian-specific). Note also that the individual RGB palette
224 * components stored in AVFrame.data[1] should be in the range 0..255.
225 * This is important as many custom PAL8 video codecs that were designed
226 * to run on the IBM VGA graphics adapter use 6-bit palette components.
227 */
228 enum PixelFormat {
229 PIX_FMT_NONE= -1,
230 PIX_FMT_YUV420P, ///< Planar YUV 4:2:0 (1 Cr & Cb sample per 2x2 Y samples)
231 PIX_FMT_YUV422, ///< Packed pixel, Y0 Cb Y1 Cr
232 PIX_FMT_RGB24, ///< Packed pixel, 3 bytes per pixel, RGBRGB...
233 PIX_FMT_BGR24, ///< Packed pixel, 3 bytes per pixel, BGRBGR...
234 PIX_FMT_YUV422P, ///< Planar YUV 4:2:2 (1 Cr & Cb sample per 2x1 Y samples)
235 PIX_FMT_YUV444P, ///< Planar YUV 4:4:4 (1 Cr & Cb sample per 1x1 Y samples)
236 PIX_FMT_RGBA32, ///< Packed pixel, 4 bytes per pixel, BGRABGRA..., stored in cpu endianness
237 PIX_FMT_YUV410P, ///< Planar YUV 4:1:0 (1 Cr & Cb sample per 4x4 Y samples)
238 PIX_FMT_YUV411P, ///< Planar YUV 4:1:1 (1 Cr & Cb sample per 4x1 Y samples)
239 PIX_FMT_RGB565, ///< always stored in cpu endianness
240 PIX_FMT_RGB555, ///< always stored in cpu endianness, most significant bit to 1
241 PIX_FMT_GRAY8,
242 PIX_FMT_MONOWHITE, ///< 0 is white
243 PIX_FMT_MONOBLACK, ///< 0 is black
244 PIX_FMT_PAL8, ///< 8 bit with RGBA palette
245 PIX_FMT_YUVJ420P, ///< Planar YUV 4:2:0 full scale (jpeg)
246 PIX_FMT_YUVJ422P, ///< Planar YUV 4:2:2 full scale (jpeg)
247 PIX_FMT_YUVJ444P, ///< Planar YUV 4:4:4 full scale (jpeg)
248 PIX_FMT_XVMC_MPEG2_MC,///< XVideo Motion Acceleration via common packet passing(xvmc_render.h)
249 PIX_FMT_XVMC_MPEG2_IDCT,
250 PIX_FMT_UYVY422, ///< Packed pixel, Cb Y0 Cr Y1
251 PIX_FMT_UYVY411, ///< Packed pixel, Cb Y0 Y1 Cr Y2 Y3
252 PIX_FMT_NB,
253 };
254
255 /* currently unused, may be used if 24/32 bits samples ever supported */
256 enum SampleFormat {
257 SAMPLE_FMT_S16 = 0, ///< signed 16 bits
258 SAMPLE_FMT_S32, ///< signed 32 bits
259 SAMPLE_FMT_FLT, ///< float
260 SAMPLE_FMT_DBL, ///< double
261 };
262
263 /* in bytes */
264 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 131072
265
266 /**
267 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
268 * this is mainly needed because some optimized bitstream readers read
269 * 32 or 64 bit at once and could read over the end<br>
270 * Note, if the first 23 bits of the additional bytes are not 0 then damaged
271 * MPEG bitstreams could cause overread and segfault
272 */
273 #define FF_INPUT_BUFFER_PADDING_SIZE 8
274
275 /**
276 * minimum encoding buffer size.
277 * used to avoid some checks during header writing
278 */
279 #define FF_MIN_BUFFER_SIZE 16384
280
281 /* motion estimation type, EPZS by default */
282 enum Motion_Est_ID {
283 ME_ZERO = 1,
284 ME_FULL,
285 ME_LOG,
286 ME_PHODS,
287 ME_EPZS,
288 ME_X1
289 };
290
291 enum AVDiscard{
292 //we leave some space between them for extensions (drop some keyframes for intra only or drop just some bidir frames)
293 AVDISCARD_NONE =-16, ///< discard nothing
294 AVDISCARD_DEFAULT= 0, ///< discard useless packets like 0 size packets in avi
295 AVDISCARD_NONREF = 8, ///< discard all non reference
296 AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
297 AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
298 AVDISCARD_ALL = 48, ///< discard all
299 };
300
301 typedef struct RcOverride{
302 int start_frame;
303 int end_frame;
304 int qscale; // if this is 0 then quality_factor will be used instead
305 float quality_factor;
306 } RcOverride;
307
308 /* only for ME compatiblity with old apps */
309 extern int motion_estimation_method;
310
311 #define FF_MAX_B_FRAMES 8
312
313 /* encoding support
314 these flags can be passed in AVCodecContext.flags before initing
315 Note: not everything is supported yet.
316 */
317
318 #define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
319 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / Advanced prediction for H263
320 #define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
321 #define CODEC_FLAG_GMC 0x0020 ///< use GMC
322 #define CODEC_FLAG_MV0 0x0040 ///< always try a MB with MV=<0,0>
323 #define CODEC_FLAG_PART 0x0080 ///< use data partitioning
324 /* parent program gurantees that the input for b-frame containing streams is not written to
325 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
326 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
327 #define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
328 #define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
329 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
330 #define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
331 #define CODEC_FLAG_EMU_EDGE 0x4000///< don't draw edges
332 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
333 #define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
334 of only at frame boundaries */
335 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
336 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
337 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay
338 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
339 #define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
340 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
341 #define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
342 /* Fx : Flag for h263+ extra options */
343 #define CODEC_FLAG_H263P_AIC 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
344 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
345 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
346 #define CODEC_FLAG_CBP_RD 0x04000000 ///< use rate distortion optimization for cbp
347 #define CODEC_FLAG_QP_RD 0x08000000 ///< use rate distortion optimization for qp selectioon
348 #define CODEC_FLAG_H263P_AIV 0x00000008 ///< H263 Alternative inter vlc
349 #define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
350 #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
351 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
352 #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
353 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
354 #define CODEC_FLAG_CLOSED_GOP 0x80000000
355 #define CODEC_FLAG2_FAST 0x00000001 ///< allow non spec compliant speedup tricks
356 #define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< strictly enforce GOP size
357 #define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< skip bitstream encoding
358 #define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< place global headers at every keyframe instead of in extradata
359
360 /* Unsupported options :
361 * Syntax Arithmetic coding (SAC)
362 * Reference Picture Selection
363 * Independant Segment Decoding */
364 /* /Fx */
365 /* codec capabilities */
366
367 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
368 /**
369 * Codec uses get_buffer() for allocating buffers.
370 * direct rendering method 1
371 */
372 #define CODEC_CAP_DR1 0x0002
373 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
374 used */
375 #define CODEC_CAP_PARSE_ONLY 0x0004
376 #define CODEC_CAP_TRUNCATED 0x0008
377 /* codec can export data for HW decoding (XvMC) */
378 #define CODEC_CAP_HWACCEL 0x0010
379 /**
380 * codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data.
381 * if this is not set, the codec is guranteed to never be feeded with NULL data
382 */
383 #define CODEC_CAP_DELAY 0x0020
384
385 //the following defines may change, don't expect compatibility if you use them
386 #define MB_TYPE_INTRA4x4 0x0001
387 #define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
388 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME h264 specific
389 #define MB_TYPE_16x16 0x0008
390 #define MB_TYPE_16x8 0x0010
391 #define MB_TYPE_8x16 0x0020
392 #define MB_TYPE_8x8 0x0040
393 #define MB_TYPE_INTERLACED 0x0080
394 #define MB_TYPE_DIRECT2 0x0100 //FIXME
395 #define MB_TYPE_ACPRED 0x0200
396 #define MB_TYPE_GMC 0x0400
397 #define MB_TYPE_SKIP 0x0800
398 #define MB_TYPE_P0L0 0x1000
399 #define MB_TYPE_P1L0 0x2000
400 #define MB_TYPE_P0L1 0x4000
401 #define MB_TYPE_P1L1 0x8000
402 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
403 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
404 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
405 #define MB_TYPE_QUANT 0x00010000
406 #define MB_TYPE_CBP 0x00020000
407 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
408
409 /**
410 * Pan Scan area.
411 * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
412 */
413 typedef struct AVPanScan{
414 /**
415 * id.
416 * - encoding: set by user.
417 * - decoding: set by lavc
418 */
419 int id;
420
421 /**
422 * width and height in 1/16 pel
423 * - encoding: set by user.
424 * - decoding: set by lavc
425 */
426 int width;
427 int height;
428
429 /**
430 * position of the top left corner in 1/16 pel for up to 3 fields/frames.
431 * - encoding: set by user.
432 * - decoding: set by lavc
433 */
434 int16_t position[3][2];
435 }AVPanScan;
436
437 #define FF_COMMON_FRAME \
438 /**\
439 * pointer to the picture planes.\
440 * this might be different from the first allocated byte\
441 * - encoding: \
442 * - decoding: \
443 */\
444 uint8_t *data[4];\
445 int linesize[4];\
446 /**\
447 * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
448 * this isn't used by lavc unless the default get/release_buffer() is used\
449 * - encoding: \
450 * - decoding: \
451 */\
452 uint8_t *base[4];\
453 /**\
454 * 1 -> keyframe, 0-> not\
455 * - encoding: set by lavc\
456 * - decoding: set by lavc\
457 */\
458 int key_frame;\
459 \
460 /**\
461 * picture type of the frame, see ?_TYPE below.\
462 * - encoding: set by lavc for coded_picture (and set by user for input)\
463 * - decoding: set by lavc\
464 */\
465 int pict_type;\
466 \
467 /**\
468 * presentation timestamp in time_base units (time when frame should be shown to user)\
469 * if AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed\
470 * - encoding: MUST be set by user\
471 * - decoding: set by lavc\
472 */\
473 int64_t pts;\
474 \
475 /**\
476 * picture number in bitstream order.\
477 * - encoding: set by\
478 * - decoding: set by lavc\
479 */\
480 int coded_picture_number;\
481 /**\
482 * picture number in display order.\
483 * - encoding: set by\
484 * - decoding: set by lavc\
485 */\
486 int display_picture_number;\
487 \
488 /**\
489 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
490 * - encoding: set by lavc for coded_picture (and set by user for input)\
491 * - decoding: set by lavc\
492 */\
493 int quality; \
494 \
495 /**\
496 * buffer age (1->was last buffer and dint change, 2->..., ...).\
497 * set to INT_MAX if the buffer has not been used yet \
498 * - encoding: unused\
499 * - decoding: MUST be set by get_buffer()\
500 */\
501 int age;\
502 \
503 /**\
504 * is this picture used as reference\
505 * - encoding: unused\
506 * - decoding: set by lavc (before get_buffer() call))\
507 */\
508 int reference;\
509 \
510 /**\
511 * QP table\
512 * - encoding: unused\
513 * - decoding: set by lavc\
514 */\
515 int8_t *qscale_table;\
516 /**\
517 * QP store stride\
518 * - encoding: unused\
519 * - decoding: set by lavc\
520 */\
521 int qstride;\
522 \
523 /**\
524 * mbskip_table[mb]>=1 if MB didnt change\
525 * stride= mb_width = (width+15)>>4\
526 * - encoding: unused\
527 * - decoding: set by lavc\
528 */\
529 uint8_t *mbskip_table;\
530 \
531 /**\
532 * Motion vector table.\
533 * @code\
534 * example:\
535 * int mv_sample_log2= 4 - motion_subsample_log2;\
536 * int mb_width= (width+15)>>4;\
537 * int mv_stride= (mb_width << mv_sample_log2) + 1;\
538 * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
539 * @endcode\
540 * - encoding: set by user\
541 * - decoding: set by lavc\
542 */\
543 int16_t (*motion_val[2])[2];\
544 \
545 /**\
546 * Macroblock type table\
547 * mb_type_base + mb_width + 2\
548 * - encoding: set by user\
549 * - decoding: set by lavc\
550 */\
551 uint32_t *mb_type;\
552 \
553 /**\
554 * log2 of the size of the block which a single vector in motion_val represents: \
555 * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
556 * - encoding: unused\
557 * - decoding: set by lavc\
558 */\
559 uint8_t motion_subsample_log2;\
560 \
561 /**\
562 * for some private data of the user\
563 * - encoding: unused\
564 * - decoding: set by user\
565 */\
566 void *opaque;\
567 \
568 /**\
569 * error\
570 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
571 * - decoding: unused\
572 */\
573 uint64_t error[4];\
574 \
575 /**\
576 * type of the buffer (to keep track of who has to dealloc data[*])\
577 * - encoding: set by the one who allocs it\
578 * - decoding: set by the one who allocs it\
579 * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
580 */\
581 int type;\
582 \
583 /**\
584 * when decoding, this signal how much the picture must be delayed.\
585 * extra_delay = repeat_pict / (2*fps)\
586 * - encoding: unused\
587 * - decoding: set by lavc\
588 */\
589 int repeat_pict;\
590 \
591 /**\
592 * \
593 */\
594 int qscale_type;\
595 \
596 /**\
597 * The content of the picture is interlaced.\
598 * - encoding: set by user\
599 * - decoding: set by lavc (default 0)\
600 */\
601 int interlaced_frame;\
602 \
603 /**\
604 * if the content is interlaced, is top field displayed first.\
605 * - encoding: set by user\
606 * - decoding: set by lavc\
607 */\
608 int top_field_first;\
609 \
610 /**\
611 * Pan scan.\
612 * - encoding: set by user\
613 * - decoding: set by lavc\
614 */\
615 AVPanScan *pan_scan;\
616 \
617 /**\
618 * tell user application that palette has changed from previous frame.\
619 * - encoding: ??? (no palette-enabled encoder yet)\
620 * - decoding: set by lavc (default 0)\
621 */\
622 int palette_has_changed;\
623 \
624 /**\
625 * Codec suggestion on buffer type if != 0\
626 * - encoding: unused\
627 * - decoding: set by lavc (before get_buffer() call))\
628 */\
629 int buffer_hints;\
630 \
631 /**\
632 * DCT coeffitients\
633 * - encoding: unused\
634 * - decoding: set by lavc\
635 */\
636 short *dct_coeff;\
637 \
638 /**\
639 * Motion referece frame index\
640 * - encoding: set by user\
641 * - decoding: set by lavc\
642 */\
643 int8_t *ref_index[2];
644
645 #define FF_QSCALE_TYPE_MPEG1 0
646 #define FF_QSCALE_TYPE_MPEG2 1
647
648 #define FF_BUFFER_TYPE_INTERNAL 1
649 #define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
650 #define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewhere else, don't dealloc image (data/base), all other tables are not shared
651 #define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, don't dealloc anything
652
653
654 #define FF_I_TYPE 1 // Intra
655 #define FF_P_TYPE 2 // Predicted
656 #define FF_B_TYPE 3 // Bi-dir predicted
657 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
658 #define FF_SI_TYPE 5
659 #define FF_SP_TYPE 6
660
661 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore)
662 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
663 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
664 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
665
666 /**
667 * Audio Video Frame.
668 */
669 typedef struct AVFrame {
670 FF_COMMON_FRAME
671 } AVFrame;
672
673 #define DEFAULT_FRAME_RATE_BASE 1001000
674
675 /**
676 * Used by av_log
677 */
678 typedef struct AVCLASS AVClass;
679 struct AVCLASS {
680 const char* class_name;
681 const char* (*item_name)(void*); /* actually passing a pointer to an AVCodecContext
682 or AVFormatContext, which begin with an AVClass.
683 Needed because av_log is in libavcodec and has no visibility
684 of AVIn/OutputFormat */
685 struct AVOption *option;
686 };
687
688 /**
689 * main external api structure.
690 */
691 typedef struct AVCodecContext {
692 /**
693 * Info on struct for av_log
694 * - set by avcodec_alloc_context
695 */
696 AVClass *av_class;
697 /**
698 * the average bitrate.
699 * - encoding: set by user. unused for constant quantizer encoding
700 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
701 */
702 int bit_rate;
703
704 /**
705 * number of bits the bitstream is allowed to diverge from the reference.
706 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
707 * - encoding: set by user. unused for constant quantizer encoding
708 * - decoding: unused
709 */
710 int bit_rate_tolerance;
711
712 /**
713 * CODEC_FLAG_*.
714 * - encoding: set by user.
715 * - decoding: set by user.
716 */
717 int flags;
718
719 /**
720 * some codecs needs additionnal format info. It is stored here
721 * - encoding: set by user.
722 * - decoding: set by lavc. (FIXME is this ok?)
723 */
724 int sub_id;
725
726 /**
727 * motion estimation algorithm used for video coding.
728 * - encoding: MUST be set by user.
729 * - decoding: unused
730 */
731 int me_method;
732
733 /**
734 * some codecs need / can use extra-data like huffman tables.
735 * mjpeg: huffman tables
736 * rv10: additional flags
737 * mpeg4: global headers (they can be in the bitstream or here)
738 * the allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
739 * then extradata_size to avoid prolems if its read with the bitstream reader
740 * - encoding: set/allocated/freed by lavc.
741 * - decoding: set/allocated/freed by user.
742 */
743 void *extradata;
744 int extradata_size;
745
746 /**
747 * this is the fundamental unit of time (in seconds) in terms
748 * of which frame timestamps are represented. for fixed-fps content,
749 * timebase should be 1/framerate and timestamp increments should be
750 * identically 1.
751 * - encoding: MUST be set by user
752 * - decoding: set by lavc.
753 */
754 AVRational time_base;
755
756 /* video only */
757 /**
758 * picture width / height.
759 * - encoding: MUST be set by user.
760 * - decoding: set by lavc.
761 * Note, for compatibility its possible to set this instead of
762 * coded_width/height before decoding
763 */
764 int width, height;
765
766 #define FF_ASPECT_EXTENDED 15
767
768 /**
769 * the number of pictures in a group of pitures, or 0 for intra_only.
770 * - encoding: set by user.
771 * - decoding: unused
772 */
773 int gop_size;
774
775 /**
776 * pixel format, see PIX_FMT_xxx.
777 * - encoding: set by user.
778 * - decoding: set by lavc.
779 */
780 enum PixelFormat pix_fmt;
781
782 /**
783 * Frame rate emulation. If not zero lower layer (i.e. format handler)
784 * has to read frames at native frame rate.
785 * - encoding: set by user.
786 * - decoding: unused.
787 */
788 int rate_emu;
789
790 /**
791 * if non NULL, 'draw_horiz_band' is called by the libavcodec
792 * decoder to draw an horizontal band. It improve cache usage. Not
793 * all codecs can do that. You must check the codec capabilities
794 * before
795 * - encoding: unused
796 * - decoding: set by user.
797 * @param height the height of the slice
798 * @param y the y position of the slice
799 * @param type 1->top field, 2->bottom field, 3->frame
800 * @param offset offset into the AVFrame.data from which the slice should be read
801 */
802 void (*draw_horiz_band)(struct AVCodecContext *s,
803 const AVFrame *src, int offset[4],
804 int y, int type, int height);
805
806 /* audio only */
807 int sample_rate; ///< samples per sec
808 int channels;
809
810 /**
811 * audio sample format.
812 * - encoding: set by user.
813 * - decoding: set by lavc.
814 */
815 enum SampleFormat sample_fmt; ///< sample format, currenly unused
816
817 /* the following data should not be initialized */
818 /**
819 * samples per packet. initialized when calling 'init'
820 */
821 int frame_size;
822 int frame_number; ///< audio or video frame number
823 int real_pict_num; ///< returns the real picture number of previous encoded frame
824
825 /**
826 * number of frames the decoded output will be delayed relative to
827 * the encoded input.
828 * - encoding: set by lavc.
829 * - decoding: unused
830 */
831 int delay;
832
833 /* - encoding parameters */
834 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
835 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
836
837 /**
838 * minimum quantizer.
839 * - encoding: set by user.
840 * - decoding: unused
841 */
842 int qmin;
843
844 /**
845 * maximum quantizer.
846 * - encoding: set by user.
847 * - decoding: unused
848 */
849 int qmax;
850
851 /**
852 * maximum quantizer difference etween frames.
853 * - encoding: set by user.
854 * - decoding: unused
855 */
856 int max_qdiff;
857
858 /**
859 * maximum number of b frames between non b frames.
860 * note: the output will be delayed by max_b_frames+1 relative to the input
861 * - encoding: set by user.
862 * - decoding: unused
863 */
864 int max_b_frames;
865
866 /**
867 * qscale factor between ip and b frames.
868 * - encoding: set by user.
869 * - decoding: unused
870 */
871 float b_quant_factor;
872
873 /** obsolete FIXME remove */
874 int rc_strategy;
875 int b_frame_strategy;
876
877 /**
878 * hurry up amount.
879 * deprecated in favor of skip_idct and skip_frame
880 * - encoding: unused
881 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
882 */
883 int hurry_up;
884
885 struct AVCodec *codec;
886
887 void *priv_data;
888
889 /* unused, FIXME remove*/
890 int rtp_mode;
891
892 int rtp_payload_size; /* The size of the RTP payload: the coder will */
893 /* do it's best to deliver a chunk with size */
894 /* below rtp_payload_size, the chunk will start */
895 /* with a start code on some codecs like H.263 */
896 /* This doesn't take account of any particular */
897 /* headers inside the transmited RTP payload */
898
899
900 /* The RTP callback: This function is called */
901 /* every time the encoder has a packet to send */
902 /* Depends on the encoder if the data starts */
903 /* with a Start Code (it should) H.263 does. */
904 /* mb_nb contains the number of macroblocks */
905 /* encoded in the RTP payload */
906 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
907
908 /* statistics, used for 2-pass encoding */
909 int mv_bits;
910 int header_bits;
911 int i_tex_bits;
912 int p_tex_bits;
913 int i_count;
914 int p_count;
915 int skip_count;
916 int misc_bits;
917
918 /**
919 * number of bits used for the previously encoded frame.
920 * - encoding: set by lavc
921 * - decoding: unused
922 */
923 int frame_bits;
924
925 /**
926 * private data of the user, can be used to carry app specific stuff.
927 * - encoding: set by user
928 * - decoding: set by user
929 */
930 void *opaque;
931
932 char codec_name[32];
933 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
934 enum CodecID codec_id; /* see CODEC_ID_xxx */
935
936 /**
937 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
938 * this is used to workaround some encoder bugs
939 * - encoding: set by user, if not then the default based on codec_id will be used
940 * - decoding: set by user, will be converted to upper case by lavc during init
941 */
942 unsigned int codec_tag;
943
944 /**
945 * workaround bugs in encoders which sometimes cannot be detected automatically.
946 * - encoding: set by user
947 * - decoding: set by user
948 */
949 int workaround_bugs;
950 #define FF_BUG_AUTODETECT 1 ///< autodetection
951 #define FF_BUG_OLD_MSMPEG4 2
952 #define FF_BUG_XVID_ILACE 4
953 #define FF_BUG_UMP4 8
954 #define FF_BUG_NO_PADDING 16
955 #define FF_BUG_AMV 32
956 #define FF_BUG_AC_VLC 0 ///< will be removed, libavcodec can now handle these non compliant files by default
957 #define FF_BUG_QPEL_CHROMA 64
958 #define FF_BUG_STD_QPEL 128
959 #define FF_BUG_QPEL_CHROMA2 256
960 #define FF_BUG_DIRECT_BLOCKSIZE 512
961 #define FF_BUG_EDGE 1024
962 #define FF_BUG_HPEL_CHROMA 2048
963 #define FF_BUG_DC_CLIP 4096
964 #define FF_BUG_MS 8192 ///< workaround various bugs in microsofts broken decoders
965 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
966
967 /**
968 * luma single coeff elimination threshold.
969 * - encoding: set by user
970 * - decoding: unused
971 */
972 int luma_elim_threshold;
973
974 /**
975 * chroma single coeff elimination threshold.
976 * - encoding: set by user
977 * - decoding: unused
978 */
979 int chroma_elim_threshold;
980
981 /**
982 * strictly follow the std (MPEG4, ...).
983 * - encoding: set by user
984 * - decoding: unused
985 */
986 int strict_std_compliance;
987 #define FF_COMPLIANCE_VERY_STRICT 2 ///< strictly conform to a older more strict version of the spec or reference software
988 #define FF_COMPLIANCE_STRICT 1 ///< strictly conform to all the things in the spec no matter what consequences
989 #define FF_COMPLIANCE_NORMAL 0
990 #define FF_COMPLIANCE_INOFFICIAL -1 ///< allow inofficial extensions
991 #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< allow non standarized experimental things
992
993 /**
994 * qscale offset between ip and b frames.
995 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
996 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
997 * - encoding: set by user.
998 * - decoding: unused
999 */
1000 float b_quant_offset;
1001
1002 /**
1003 * error resilience higher values will detect more errors but may missdetect
1004 * some more or less valid parts as errors.
1005 * - encoding: unused
1006 * - decoding: set by user
1007 */
1008 int error_resilience;
1009 #define FF_ER_CAREFUL 1
1010 #define FF_ER_COMPLIANT 2
1011 #define FF_ER_AGGRESSIVE 3
1012 #define FF_ER_VERY_AGGRESSIVE 4
1013
1014 /**
1015 * called at the beginning of each frame to get a buffer for it.
1016 * if pic.reference is set then the frame will be read later by lavc
1017 * avcodec_align_dimensions() should be used to find the required width and
1018 * height, as they normally need to be rounded up to the next multiple of 16
1019 * - encoding: unused
1020 * - decoding: set by lavc, user can override
1021 */
1022 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1023
1024 /**
1025 * called to release buffers which where allocated with get_buffer.
1026 * a released buffer can be reused in get_buffer()
1027 * pic.data[*] must be set to NULL
1028 * - encoding: unused
1029 * - decoding: set by lavc, user can override
1030 */
1031 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1032
1033 /**
1034 * if 1 the stream has a 1 frame delay during decoding.
1035 * - encoding: set by lavc
1036 * - decoding: set by lavc
1037 */
1038 int has_b_frames;
1039
1040 /**
1041 * number of bytes per packet if constant and known or 0
1042 * used by some WAV based audio codecs
1043 */
1044 int block_align;
1045
1046 int parse_only; /* - decoding only: if true, only parsing is done
1047 (function avcodec_parse_frame()). The frame
1048 data is returned. Only MPEG codecs support this now. */
1049
1050 /**
1051 * 0-> h263 quant 1-> mpeg quant.
1052 * - encoding: set by user.
1053 * - decoding: unused
1054 */
1055 int mpeg_quant;
1056
1057 /**
1058 * pass1 encoding statistics output buffer.
1059 * - encoding: set by lavc
1060 * - decoding: unused
1061 */
1062 char *stats_out;
1063
1064 /**
1065 * pass2 encoding statistics input buffer.
1066 * concatenated stuff from stats_out of pass1 should be placed here
1067 * - encoding: allocated/set/freed by user
1068 * - decoding: unused
1069 */
1070 char *stats_in;
1071
1072 /**
1073 * ratecontrol qmin qmax limiting method.
1074 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
1075 * - encoding: set by user.
1076 * - decoding: unused
1077 */
1078 float rc_qsquish;
1079
1080 float rc_qmod_amp;
1081 int rc_qmod_freq;
1082
1083 /**
1084 * ratecontrol override, see RcOverride.
1085 * - encoding: allocated/set/freed by user.
1086 * - decoding: unused
1087 */
1088 RcOverride *rc_override;
1089 int rc_override_count;
1090
1091 /**
1092 * rate control equation.
1093 * - encoding: set by user
1094 * - decoding: unused
1095 */
1096 char *rc_eq;
1097
1098 /**
1099 * maximum bitrate.
1100 * - encoding: set by user.
1101 * - decoding: unused
1102 */
1103 int rc_max_rate;
1104
1105 /**
1106 * minimum bitrate.
1107 * - encoding: set by user.
1108 * - decoding: unused
1109 */
1110 int rc_min_rate;
1111
1112 /**
1113 * decoder bitstream buffer size.
1114 * - encoding: set by user.
1115 * - decoding: unused
1116 */
1117 int rc_buffer_size;
1118 float rc_buffer_aggressivity;
1119
1120 /**
1121 * qscale factor between p and i frames.
1122 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1123 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1124 * - encoding: set by user.
1125 * - decoding: unused
1126 */
1127 float i_quant_factor;
1128
1129 /**
1130 * qscale offset between p and i frames.
1131 * - encoding: set by user.
1132 * - decoding: unused
1133 */
1134 float i_quant_offset;
1135
1136 /**
1137 * initial complexity for pass1 ratecontrol.
1138 * - encoding: set by user.
1139 * - decoding: unused
1140 */
1141 float rc_initial_cplx;
1142
1143 /**
1144 * dct algorithm, see FF_DCT_* below.
1145 * - encoding: set by user
1146 * - decoding: unused
1147 */
1148 int dct_algo;
1149 #define FF_DCT_AUTO 0
1150 #define FF_DCT_FASTINT 1
1151 #define FF_DCT_INT 2
1152 #define FF_DCT_MMX 3
1153 #define FF_DCT_MLIB 4
1154 #define FF_DCT_ALTIVEC 5
1155 #define FF_DCT_FAAN 6
1156
1157 /**
1158 * luminance masking (0-> disabled).
1159 * - encoding: set by user
1160 * - decoding: unused
1161 */
1162 float lumi_masking;
1163
1164 /**
1165 * temporary complexity masking (0-> disabled).
1166 * - encoding: set by user
1167 * - decoding: unused
1168 */
1169 float temporal_cplx_masking;
1170
1171 /**
1172 * spatial complexity masking (0-> disabled).
1173 * - encoding: set by user
1174 * - decoding: unused
1175 */
1176 float spatial_cplx_masking;
1177
1178 /**
1179 * p block masking (0-> disabled).
1180 * - encoding: set by user
1181 * - decoding: unused
1182 */
1183 float p_masking;
1184
1185 /**
1186 * darkness masking (0-> disabled).
1187 * - encoding: set by user
1188 * - decoding: unused
1189 */
1190 float dark_masking;
1191
1192
1193 /* for binary compatibility */
1194 int unused;
1195
1196 /**
1197 * idct algorithm, see FF_IDCT_* below.
1198 * - encoding: set by user
1199 * - decoding: set by user
1200 */
1201 int idct_algo;
1202 #define FF_IDCT_AUTO 0
1203 #define FF_IDCT_INT 1
1204 #define FF_IDCT_SIMPLE 2
1205 #define FF_IDCT_SIMPLEMMX 3
1206 #define FF_IDCT_LIBMPEG2MMX 4
1207 #define FF_IDCT_PS2 5
1208 #define FF_IDCT_MLIB 6
1209 #define FF_IDCT_ARM 7
1210 #define FF_IDCT_ALTIVEC 8
1211 #define FF_IDCT_SH4 9
1212 #define FF_IDCT_SIMPLEARM 10
1213 #define FF_IDCT_H264 11
1214 #define FF_IDCT_VP3 12
1215 #define FF_IDCT_IPP 13
1216 #define FF_IDCT_XVIDMMX 14
1217
1218 /**
1219 * slice count.
1220 * - encoding: set by lavc
1221 * - decoding: set by user (or 0)
1222 */
1223 int slice_count;
1224 /**
1225 * slice offsets in the frame in bytes.
1226 * - encoding: set/allocated by lavc
1227 * - decoding: set/allocated by user (or NULL)
1228 */
1229 int *slice_offset;
1230
1231 /**
1232 * error concealment flags.
1233 * - encoding: unused
1234 * - decoding: set by user
1235 */
1236 int error_concealment;
1237 #define FF_EC_GUESS_MVS 1
1238 #define FF_EC_DEBLOCK 2
1239
1240 /**
1241 * dsp_mask could be add used to disable unwanted CPU features
1242 * CPU features (i.e. MMX, SSE. ...)
1243 *
1244 * with FORCE flag you may instead enable given CPU features
1245 * (Dangerous: usable in case of misdetection, improper usage however will
1246 * result into program crash)
1247 */
1248 unsigned dsp_mask;
1249 #define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
1250 /* lower 16 bits - CPU features */
1251 #ifdef HAVE_MMX
1252 #define FF_MM_MMX 0x0001 /* standard MMX */
1253 #define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
1254 #define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
1255 #define FF_MM_SSE 0x0008 /* SSE functions */
1256 #define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
1257 #define FF_MM_3DNOWEXT 0x0020 /* AMD 3DNowExt */
1258 #endif /* HAVE_MMX */
1259 #ifdef HAVE_IWMMXT
1260 #define FF_MM_IWMMXT 0x0100 /* XScale IWMMXT */
1261 #endif /* HAVE_IWMMXT */
1262
1263 /**
1264 * bits per sample/pixel from the demuxer (needed for huffyuv).
1265 * - encoding: set by lavc
1266 * - decoding: set by user
1267 */
1268 int bits_per_sample;
1269
1270 /**
1271 * prediction method (needed for huffyuv).
1272 * - encoding: set by user
1273 * - decoding: unused
1274 */
1275 int prediction_method;
1276 #define FF_PRED_LEFT 0
1277 #define FF_PRED_PLANE 1
1278 #define FF_PRED_MEDIAN 2
1279
1280 /**
1281 * sample aspect ratio (0 if unknown).
1282 * numerator and denominator must be relative prime and smaller then 256 for some video standards
1283 * - encoding: set by user.
1284 * - decoding: set by lavc.
1285 */
1286 AVRational sample_aspect_ratio;
1287
1288 /**
1289 * the picture in the bitstream.
1290 * - encoding: set by lavc
1291 * - decoding: set by lavc
1292 */
1293 AVFrame *coded_frame;
1294
1295 /**
1296 * debug.
1297 * - encoding: set by user.
1298 * - decoding: set by user.
1299 */
1300 int debug;
1301 #define FF_DEBUG_PICT_INFO 1
1302 #define FF_DEBUG_RC 2
1303 #define FF_DEBUG_BITSTREAM 4
1304 #define FF_DEBUG_MB_TYPE 8
1305 #define FF_DEBUG_QP 16
1306 #define FF_DEBUG_MV 32
1307 #define FF_DEBUG_DCT_COEFF 0x00000040
1308 #define FF_DEBUG_SKIP 0x00000080
1309 #define FF_DEBUG_STARTCODE 0x00000100
1310 #define FF_DEBUG_PTS 0x00000200
1311 #define FF_DEBUG_ER 0x00000400
1312 #define FF_DEBUG_MMCO 0x00000800
1313 #define FF_DEBUG_BUGS 0x00001000
1314 #define FF_DEBUG_VIS_QP 0x00002000
1315 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1316
1317 /**
1318 * debug.
1319 * - encoding: set by user.
1320 * - decoding: set by user.
1321 */
1322 int debug_mv;
1323 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1324 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1325 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1326
1327 /**
1328 * error.
1329 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1330 * - decoding: unused
1331 */
1332 uint64_t error[4];
1333
1334 /**
1335 * minimum MB quantizer.
1336 * - encoding: unused
1337 * - decoding: unused
1338 */
1339 int mb_qmin;
1340
1341 /**
1342 * maximum MB quantizer.
1343 * - encoding: unused
1344 * - decoding: unused
1345 */
1346 int mb_qmax;
1347
1348 /**
1349 * motion estimation compare function.
1350 * - encoding: set by user.
1351 * - decoding: unused
1352 */
1353 int me_cmp;
1354 /**
1355 * subpixel motion estimation compare function.
1356 * - encoding: set by user.
1357 * - decoding: unused
1358 */
1359 int me_sub_cmp;
1360 /**
1361 * macroblock compare function (not supported yet).
1362 * - encoding: set by user.
1363 * - decoding: unused
1364 */
1365 int mb_cmp;
1366 /**
1367 * interlaced dct compare function
1368 * - encoding: set by user.
1369 * - decoding: unused
1370 */
1371 int ildct_cmp;
1372 #define FF_CMP_SAD 0
1373 #define FF_CMP_SSE 1
1374 #define FF_CMP_SATD 2
1375 #define FF_CMP_DCT 3
1376 #define FF_CMP_PSNR 4
1377 #define FF_CMP_BIT 5
1378 #define FF_CMP_RD 6
1379 #define FF_CMP_ZERO 7
1380 #define FF_CMP_VSAD 8
1381 #define FF_CMP_VSSE 9
1382 #define FF_CMP_NSSE 10
1383 #define FF_CMP_W53 11
1384 #define FF_CMP_W97 12
1385 #define FF_CMP_DCTMAX 13
1386 #define FF_CMP_CHROMA 256
1387
1388 /**
1389 * ME diamond size & shape.
1390 * - encoding: set by user.
1391 * - decoding: unused
1392 */
1393 int dia_size;
1394
1395 /**
1396 * amount of previous MV predictors (2a+1 x 2a+1 square).
1397 * - encoding: set by user.
1398 * - decoding: unused
1399 */
1400 int last_predictor_count;
1401
1402 /**
1403 * pre pass for motion estimation.
1404 * - encoding: set by user.
1405 * - decoding: unused
1406 */
1407 int pre_me;
1408
1409 /**
1410 * motion estimation pre pass compare function.
1411 * - encoding: set by user.
1412 * - decoding: unused
1413 */
1414 int me_pre_cmp;
1415
1416 /**
1417 * ME pre pass diamond size & shape.
1418 * - encoding: set by user.
1419 * - decoding: unused
1420 */
1421 int pre_dia_size;
1422
1423 /**
1424 * subpel ME quality.
1425 * - encoding: set by user.
1426 * - decoding: unused
1427 */
1428 int me_subpel_quality;
1429
1430 /**
1431 * callback to negotiate the pixelFormat.
1432 * @param fmt is the list of formats which are supported by the codec,
1433 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1434 * the first is allways the native one
1435 * @return the choosen format
1436 * - encoding: unused
1437 * - decoding: set by user, if not set then the native format will always be choosen
1438 */
1439 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1440
1441 /**
1442 * DTG active format information (additionnal aspect ratio
1443 * information only used in DVB MPEG2 transport streams). 0 if
1444 * not set.
1445 *
1446 * - encoding: unused.
1447 * - decoding: set by decoder
1448 */
1449 int dtg_active_format;
1450 #define FF_DTG_AFD_SAME 8
1451 #define FF_DTG_AFD_4_3 9
1452 #define FF_DTG_AFD_16_9 10
1453 #define FF_DTG_AFD_14_9 11
1454 #define FF_DTG_AFD_4_3_SP_14_9 13
1455 #define FF_DTG_AFD_16_9_SP_14_9 14
1456 #define FF_DTG_AFD_SP_4_3 15
1457
1458 /**
1459 * Maximum motion estimation search range in subpel units.
1460 * if 0 then no limit
1461 *
1462 * - encoding: set by user.
1463 * - decoding: unused.
1464 */
1465 int me_range;
1466
1467 /**
1468 * intra quantizer bias.
1469 * - encoding: set by user.
1470 * - decoding: unused
1471 */
1472 int intra_quant_bias;
1473 #define FF_DEFAULT_QUANT_BIAS 999999
1474
1475 /**
1476 * inter quantizer bias.
1477 * - encoding: set by user.
1478 * - decoding: unused
1479 */
1480 int inter_quant_bias;
1481
1482 /**
1483 * color table ID.
1484 * - encoding: unused.
1485 * - decoding: which clrtable should be used for 8bit RGB images
1486 * table have to be stored somewhere FIXME
1487 */
1488 int color_table_id;
1489
1490 /**
1491 * internal_buffer count.
1492 * Don't touch, used by lavc default_get_buffer()
1493 */
1494 int internal_buffer_count;
1495
1496 /**
1497 * internal_buffers.
1498 * Don't touch, used by lavc default_get_buffer()
1499 */
1500 void *internal_buffer;
1501
1502 #define FF_LAMBDA_SHIFT 7
1503 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1504 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1505 #define FF_LAMBDA_MAX (256*128-1)
1506
1507 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1508 /**
1509 * global quality for codecs which cannot change it per frame.
1510 * this should be proportional to MPEG1/2/4 qscale.
1511 * - encoding: set by user.
1512 * - decoding: unused
1513 */
1514 int global_quality;
1515
1516 #define FF_CODER_TYPE_VLC 0
1517 #define FF_CODER_TYPE_AC 1
1518 /**
1519 * coder type
1520 * - encoding: set by user.
1521 * - decoding: unused
1522 */
1523 int coder_type;
1524
1525 /**
1526 * context model
1527 * - encoding: set by user.
1528 * - decoding: unused
1529 */
1530 int context_model;
1531
1532 /**
1533 * slice flags
1534 * - encoding: unused
1535 * - decoding: set by user.
1536 */
1537 int slice_flags;
1538 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1539 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1540 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1541
1542 /**
1543 * XVideo Motion Acceleration
1544 * - encoding: forbidden
1545 * - decoding: set by decoder
1546 */
1547 int xvmc_acceleration;
1548
1549 /**
1550 * macroblock decision mode
1551 * - encoding: set by user.
1552 * - decoding: unused
1553 */
1554 int mb_decision;
1555 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1556 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1557 #define FF_MB_DECISION_RD 2 ///< rate distoration
1558
1559 /**
1560 * custom intra quantization matrix
1561 * - encoding: set by user, can be NULL
1562 * - decoding: set by lavc
1563 */
1564 uint16_t *intra_matrix;
1565
1566 /**
1567 * custom inter quantization matrix
1568 * - encoding: set by user, can be NULL
1569 * - decoding: set by lavc
1570 */
1571 uint16_t *inter_matrix;
1572
1573 /**
1574 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1575 * this is used to workaround some encoder bugs
1576 * - encoding: unused
1577 * - decoding: set by user, will be converted to upper case by lavc during init
1578 */
1579 unsigned int stream_codec_tag;
1580
1581 /**
1582 * scene change detection threshold.
1583 * 0 is default, larger means fewer detected scene changes
1584 * - encoding: set by user.
1585 * - decoding: unused
1586 */
1587 int scenechange_threshold;
1588
1589 /**
1590 * minimum lagrange multipler
1591 * - encoding: set by user.
1592 * - decoding: unused
1593 */
1594 int lmin;
1595
1596 /**
1597 * maximum lagrange multipler
1598 * - encoding: set by user.
1599 * - decoding: unused
1600 */
1601 int lmax;
1602
1603 /**
1604 * Palette control structure
1605 * - encoding: ??? (no palette-enabled encoder yet)
1606 * - decoding: set by user.
1607 */
1608 struct AVPaletteControl *palctrl;
1609
1610 /**
1611 * noise reduction strength
1612 * - encoding: set by user.
1613 * - decoding: unused
1614 */
1615 int noise_reduction;
1616
1617 /**
1618 * called at the beginning of a frame to get cr buffer for it.
1619 * buffer type (size, hints) must be the same. lavc won't check it.
1620 * lavc will pass previous buffer in pic, function should return
1621 * same buffer or new buffer with old frame "painted" into it.
1622 * if pic.data[0] == NULL must behave like get_buffer().
1623 * - encoding: unused
1624 * - decoding: set by lavc, user can override
1625 */
1626 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1627
1628 /**
1629 * number of bits which should be loaded into the rc buffer before decoding starts
1630 * - encoding: set by user.
1631 * - decoding: unused
1632 */
1633 int rc_initial_buffer_occupancy;
1634
1635 /**
1636 *
1637 * - encoding: set by user.
1638 * - decoding: unused
1639 */
1640 int inter_threshold;
1641
1642 /**
1643 * CODEC_FLAG2_*.
1644 * - encoding: set by user.
1645 * - decoding: set by user.
1646 */
1647 int flags2;
1648
1649 /**
1650 * simulates errors in the bitstream to test error concealment.
1651 * - encoding: set by user.
1652 * - decoding: unused.
1653 */
1654 int error_rate;
1655
1656 /**
1657 * MP3 antialias algorithm, see FF_AA_* below.
1658 * - encoding: unused
1659 * - decoding: set by user
1660 */
1661 int antialias_algo;
1662 #define FF_AA_AUTO 0
1663 #define FF_AA_FASTINT 1 //not implemented yet
1664 #define FF_AA_INT 2
1665 #define FF_AA_FLOAT 3
1666 /**
1667 * Quantizer noise shaping.
1668 * - encoding: set by user
1669 * - decoding: unused
1670 */
1671 int quantizer_noise_shaping;
1672
1673 /**
1674 * Thread count.
1675 * is used to decide how many independant tasks should be passed to execute()
1676 * - encoding: set by user
1677 * - decoding: set by user
1678 */
1679 int thread_count;
1680
1681 /**
1682 * the codec may call this to execute several independant things. it will return only after
1683 * finishing all tasks, the user may replace this with some multithreaded implementation, the
1684 * default implementation will execute the parts serially
1685 * @param count the number of things to execute
1686 * - encoding: set by lavc, user can override
1687 * - decoding: set by lavc, user can override
1688 */
1689 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1690
1691 /**
1692 * Thread opaque.
1693 * can be used by execute() to store some per AVCodecContext stuff.
1694 * - encoding: set by execute()
1695 * - decoding: set by execute()
1696 */
1697 void *thread_opaque;
1698
1699 /**
1700 * Motion estimation threshold. under which no motion estimation is
1701 * performed, but instead the user specified motion vectors are used
1702 *
1703 * - encoding: set by user
1704 * - decoding: unused
1705 */
1706 int me_threshold;
1707
1708 /**
1709 * Macroblock threshold. under which the user specified macroblock types will be used
1710 * - encoding: set by user
1711 * - decoding: unused
1712 */
1713 int mb_threshold;
1714
1715 /**
1716 * precision of the intra dc coefficient - 8.
1717 * - encoding: set by user
1718 * - decoding: unused
1719 */
1720 int intra_dc_precision;
1721
1722 /**
1723 * noise vs. sse weight for the nsse comparsion function.
1724 * - encoding: set by user
1725 * - decoding: unused
1726 */
1727 int nsse_weight;
1728
1729 /**
1730 * number of macroblock rows at the top which are skipped.
1731 * - encoding: unused
1732 * - decoding: set by user
1733 */
1734 int skip_top;
1735
1736 /**
1737 * number of macroblock rows at the bottom which are skipped.
1738 * - encoding: unused
1739 * - decoding: set by user
1740 */
1741 int skip_bottom;
1742
1743 /**
1744 * profile
1745 * - encoding: set by user
1746 * - decoding: set by lavc
1747 */
1748 int profile;
1749 #define FF_PROFILE_UNKNOWN -99
1750
1751 /**
1752 * level
1753 * - encoding: set by user
1754 * - decoding: set by lavc
1755 */
1756 int level;
1757 #define FF_LEVEL_UNKNOWN -99
1758
1759 /**
1760 * low resolution decoding. 1-> 1/2 size, 2->1/4 size
1761 * - encoding: unused
1762 * - decoding: set by user
1763 */
1764 int lowres;
1765
1766 /**
1767 * bitsream width / height. may be different from width/height if lowres
1768 * or other things are used
1769 * - encoding: unused
1770 * - decoding: set by user before init if known, codec should override / dynamically change if needed
1771 */
1772 int coded_width, coded_height;
1773
1774 /**
1775 * frame skip threshold
1776 * - encoding: set by user
1777 * - decoding: unused
1778 */
1779 int frame_skip_threshold;
1780
1781 /**
1782 * frame skip factor
1783 * - encoding: set by user
1784 * - decoding: unused
1785 */
1786 int frame_skip_factor;
1787
1788 /**
1789 * frame skip exponent
1790 * - encoding: set by user
1791 * - decoding: unused
1792 */
1793 int frame_skip_exp;
1794
1795 /**
1796 * frame skip comparission function
1797 * - encoding: set by user.
1798 * - decoding: unused
1799 */
1800 int frame_skip_cmp;
1801
1802 /**
1803 * border processing masking. raises the quantizer for mbs on the borders
1804 * of the picture.
1805 * - encoding: set by user
1806 * - decoding: unused
1807 */
1808 float border_masking;
1809
1810 /**
1811 * minimum MB lagrange multipler.
1812 * - encoding: set by user.
1813 * - decoding: unused
1814 */
1815 int mb_lmin;
1816
1817 /**
1818 * maximum MB lagrange multipler.
1819 * - encoding: set by user.
1820 * - decoding: unused
1821 */
1822 int mb_lmax;
1823
1824 /**
1825 *
1826 * - encoding: set by user.
1827 * - decoding: unused
1828 */
1829 int me_penalty_compensation;
1830
1831 /**
1832 *
1833 * - encoding: unused
1834 * - decoding: set by user.
1835 */
1836 enum AVDiscard skip_loop_filter;
1837
1838 /**
1839 *
1840 * - encoding: unused
1841 * - decoding: set by user.
1842 */
1843 enum AVDiscard skip_idct;
1844
1845 /**
1846 *
1847 * - encoding: unused
1848 * - decoding: set by user.
1849 */
1850 enum AVDiscard skip_frame;
1851 } AVCodecContext;
1852
1853 /**
1854 * AVCodec.
1855 */
1856 typedef struct AVCodec {
1857 const char *name;
1858 enum CodecType type;
1859 enum CodecID id;
1860 int priv_data_size;
1861 int (*init)(AVCodecContext *);
1862 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
1863 int (*close)(AVCodecContext *);
1864 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
1865 uint8_t *buf, int buf_size);
1866 int capabilities;
1867 #if LIBAVCODEC_VERSION_INT < ((50<<16)+(0<<8)+0)
1868 void *dummy; // FIXME remove next time we break binary compatibility
1869 #endif
1870 struct AVCodec *next;
1871 void (*flush)(AVCodecContext *);
1872 const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
1873 const enum PixelFormat *pix_fmts; ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
1874 } AVCodec;
1875
1876 /**
1877 * four components are given, that's all.
1878 * the last component is alpha
1879 */
1880 typedef struct AVPicture {
1881 uint8_t *data[4];
1882 int linesize[4]; ///< number of bytes per line
1883 } AVPicture;
1884
1885 /**
1886 * AVPaletteControl
1887 * This structure defines a method for communicating palette changes
1888 * between and demuxer and a decoder.
1889 */
1890 #define AVPALETTE_SIZE 1024
1891 #define AVPALETTE_COUNT 256
1892 typedef struct AVPaletteControl {
1893
1894 /* demuxer sets this to 1 to indicate the palette has changed;
1895 * decoder resets to 0 */
1896 int palette_changed;
1897
1898 /* 4-byte ARGB palette entries, stored in native byte order; note that
1899 * the individual palette components should be on a 8-bit scale; if
1900 * the palette data comes from a IBM VGA native format, the component
1901 * data is probably 6 bits in size and needs to be scaled */
1902 unsigned int palette[AVPALETTE_COUNT];
1903
1904 } AVPaletteControl;
1905
1906 typedef struct AVSubtitleRect {
1907 uint16_t x;
1908 uint16_t y;
1909 uint16_t w;
1910 uint16_t h;
1911 uint16_t nb_colors;
1912 int linesize;
1913 uint32_t *rgba_palette;
1914 uint8_t *bitmap;
1915 } AVSubtitleRect;
1916
1917 typedef struct AVSubtitle {
1918 uint16_t format; /* 0 = graphics */
1919 uint32_t start_display_time; /* relative to packet pts, in ms */
1920 uint32_t end_display_time; /* relative to packet pts, in ms */
1921 uint32_t num_rects;
1922 AVSubtitleRect *rects;
1923 } AVSubtitle;
1924
1925 extern AVCodec ac3_encoder;
1926 extern AVCodec mp2_encoder;
1927 extern AVCodec mp3lame_encoder;
1928 extern AVCodec oggvorbis_encoder;
1929 extern AVCodec oggtheora_encoder;
1930 extern AVCodec faac_encoder;
1931 extern AVCodec xvid_encoder;
1932 extern AVCodec mpeg1video_encoder;
1933 extern AVCodec mpeg2video_encoder;
1934 extern AVCodec h261_encoder;
1935 extern AVCodec h263_encoder;
1936 extern AVCodec h263p_encoder;
1937 extern AVCodec flv_encoder;
1938 extern AVCodec rv10_encoder;
1939 extern AVCodec rv20_encoder;
1940 extern AVCodec dvvideo_encoder;
1941 extern AVCodec mjpeg_encoder;
1942 extern AVCodec ljpeg_encoder;
1943 extern AVCodec png_encoder;
1944 extern AVCodec ppm_encoder;
1945 extern AVCodec pgm_encoder;
1946 extern AVCodec pgmyuv_encoder;
1947 extern AVCodec pbm_encoder;
1948 extern AVCodec pam_encoder;
1949 extern AVCodec mpeg4_encoder;
1950 extern AVCodec msmpeg4v1_encoder;
1951 extern AVCodec msmpeg4v2_encoder;
1952 extern AVCodec msmpeg4v3_encoder;
1953 extern AVCodec wmv1_encoder;
1954 extern AVCodec wmv2_encoder;
1955 extern AVCodec huffyuv_encoder;
1956 extern AVCodec ffvhuff_encoder;
1957 extern AVCodec h264_encoder;
1958 extern AVCodec asv1_encoder;
1959 extern AVCodec asv2_encoder;
1960 extern AVCodec vcr1_encoder;
1961 extern AVCodec ffv1_encoder;
1962 extern AVCodec snow_encoder;
1963 extern AVCodec mdec_encoder;
1964 extern AVCodec zlib_encoder;
1965 extern AVCodec sonic_encoder;
1966 extern AVCodec sonic_ls_encoder;
1967 extern AVCodec svq1_encoder;
1968 extern AVCodec x264_encoder;
1969
1970 extern AVCodec h263_decoder;
1971 extern AVCodec h261_decoder;
1972 extern AVCodec mpeg4_decoder;
1973 extern AVCodec msmpeg4v1_decoder;
1974 extern AVCodec msmpeg4v2_decoder;
1975 extern AVCodec msmpeg4v3_decoder;
1976 extern AVCodec wmv1_decoder;
1977 extern AVCodec wmv2_decoder;
1978 extern AVCodec vc9_decoder;
1979 extern AVCodec wmv3_decoder;
1980 extern AVCodec mpeg1video_decoder;
1981 extern AVCodec mpeg2video_decoder;
1982 extern AVCodec mpegvideo_decoder;
1983 extern AVCodec mpeg_xvmc_decoder;
1984 extern AVCodec h263i_decoder;
1985 extern AVCodec flv_decoder;
1986 extern AVCodec rv10_decoder;
1987 extern AVCodec rv20_decoder;
1988 extern AVCodec rv30_decoder;
1989 extern AVCodec rv40_decoder;
1990 extern AVCodec svq1_decoder;
1991 extern AVCodec svq3_decoder;
1992 extern AVCodec dvvideo_decoder;
1993 extern AVCodec wmav1_decoder;
1994 extern AVCodec wmav2_decoder;
1995 extern AVCodec mjpeg_decoder;
1996 extern AVCodec mjpegb_decoder;
1997 extern AVCodec sp5x_decoder;
1998 extern AVCodec png_decoder;
1999 extern AVCodec mp2_decoder;
2000 extern AVCodec mp3_decoder;
2001 extern AVCodec mp3adu_decoder;
2002 extern AVCodec mp3on4_decoder;
2003 extern AVCodec mace3_decoder;
2004 extern AVCodec mace6_decoder;
2005 extern AVCodec huffyuv_decoder;
2006 extern AVCodec ffvhuff_decoder;
2007 extern AVCodec oggvorbis_decoder;
2008 extern AVCodec oggtheora_decoder;
2009 extern AVCodec cyuv_decoder;
2010 extern AVCodec h264_decoder;
2011 extern AVCodec indeo3_decoder;
2012 extern AVCodec vp3_decoder;
2013 extern AVCodec theora_decoder;
2014 extern AVCodec amr_nb_decoder;
2015 extern AVCodec amr_nb_encoder;
2016 extern AVCodec amr_wb_encoder;
2017 extern AVCodec amr_wb_decoder;
2018 extern AVCodec aac_decoder;
2019 extern AVCodec mpeg4aac_decoder;
2020 extern AVCodec asv1_decoder;
2021 extern AVCodec asv2_decoder;
2022 extern AVCodec vcr1_decoder;
2023 extern AVCodec cljr_decoder;
2024 extern AVCodec ffv1_decoder;
2025 extern AVCodec snow_decoder;
2026 extern AVCodec fourxm_decoder;
2027 extern AVCodec mdec_decoder;
2028 extern AVCodec roq_decoder;
2029 extern AVCodec interplay_video_decoder;
2030 extern AVCodec xan_wc3_decoder;
2031 extern AVCodec rpza_decoder;
2032 extern AVCodec cinepak_decoder;
2033 extern AVCodec msrle_decoder;
2034 extern AVCodec msvideo1_decoder;
2035 extern AVCodec vqa_decoder;
2036 extern AVCodec idcin_decoder;
2037 extern AVCodec eightbps_decoder;
2038 extern AVCodec smc_decoder;
2039 extern AVCodec flic_decoder;
2040 extern AVCodec vmdvideo_decoder;
2041 extern AVCodec vmdaudio_decoder;
2042 extern AVCodec truemotion1_decoder;
2043 extern AVCodec truemotion2_decoder;
2044 extern AVCodec mszh_decoder;
2045 extern AVCodec zlib_decoder;
2046 extern AVCodec ra_144_decoder;
2047 extern AVCodec ra_288_decoder;
2048 extern AVCodec roq_dpcm_decoder;
2049 extern AVCodec interplay_dpcm_decoder;
2050 extern AVCodec xan_dpcm_decoder;
2051 extern AVCodec sol_dpcm_decoder;
2052 extern AVCodec sonic_decoder;
2053 extern AVCodec qtrle_decoder;
2054 extern AVCodec flac_decoder;
2055 extern AVCodec tscc_decoder;
2056 extern AVCodec ulti_decoder;
2057 extern AVCodec qdraw_decoder;
2058 extern AVCodec xl_decoder;
2059 extern AVCodec qpeg_decoder;
2060 extern AVCodec shorten_decoder;
2061 extern AVCodec loco_decoder;
2062 extern AVCodec wnv1_decoder;
2063 extern AVCodec aasc_decoder;
2064 extern AVCodec alac_decoder;
2065 extern AVCodec ws_snd1_decoder;
2066 extern AVCodec indeo2_decoder;
2067 extern AVCodec vorbis_decoder;
2068 extern AVCodec fraps_decoder;
2069 extern AVCodec libgsm_encoder;
2070 extern AVCodec libgsm_decoder;
2071
2072 /* pcm codecs */
2073 #define PCM_CODEC(id, name) \
2074 extern AVCodec name ## _decoder; \
2075 extern AVCodec name ## _encoder
2076
2077 PCM_CODEC(CODEC_ID_PCM_S32LE, pcm_s32le);
2078 PCM_CODEC(CODEC_ID_PCM_S32BE, pcm_s32be);
2079 PCM_CODEC(CODEC_ID_PCM_U32LE, pcm_u32le);
2080 PCM_CODEC(CODEC_ID_PCM_U32BE, pcm_u32be);
2081 PCM_CODEC(CODEC_ID_PCM_S24LE, pcm_s24le);
2082 PCM_CODEC(CODEC_ID_PCM_S24BE, pcm_s24be);
2083 PCM_CODEC(CODEC_ID_PCM_U24LE, pcm_u24le);
2084 PCM_CODEC(CODEC_ID_PCM_U24BE, pcm_u24be);
2085 PCM_CODEC(CODEC_ID_PCM_S24DAUD, pcm_s24daud);
2086 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
2087 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
2088 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
2089 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
2090 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
2091 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
2092 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
2093 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
2094
2095 /* adpcm codecs */
2096
2097 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
2098 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
2099 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
2100 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
2101 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
2102 PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
2103 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
2104 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
2105 PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
2106 PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
2107 PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
2108 PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
2109 PCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
2110 PCM_CODEC(CODEC_ID_ADPCM_SWF, adpcm_swf);
2111 PCM_CODEC(CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha);
2112
2113 #undef PCM_CODEC
2114
2115 /* dummy raw video codec */
2116 extern AVCodec rawvideo_encoder;
2117 extern AVCodec rawvideo_decoder;
2118
2119 /* the following codecs use external GPL libs */
2120 extern AVCodec ac3_decoder;
2121 extern AVCodec dts_decoder;
2122
2123 /* subtitles */
2124 extern AVCodec dvdsub_decoder;
2125 extern AVCodec dvbsub_encoder;
2126 extern AVCodec dvbsub_decoder;
2127
2128 /* resample.c */
2129
2130 struct ReSampleContext;
2131 struct AVResampleContext;
2132
2133 typedef struct ReSampleContext ReSampleContext;
2134
2135 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2136 int output_rate, int input_rate);
2137 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2138 void audio_resample_close(ReSampleContext *s);
2139
2140 struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2141 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2142 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2143 void av_resample_close(struct AVResampleContext *c);
2144
2145 /* YUV420 format is assumed ! */
2146
2147 struct ImgReSampleContext;
2148
2149 typedef struct ImgReSampleContext ImgReSampleContext;
2150
2151 ImgReSampleContext *img_resample_init(int output_width, int output_height,
2152 int input_width, int input_height);
2153
2154 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
2155 int iwidth, int iheight,
2156 int topBand, int bottomBand,
2157 int leftBand, int rightBand,
2158 int padtop, int padbottom,
2159 int padleft, int padright);
2160
2161
2162 void img_resample(ImgReSampleContext *s,
2163 AVPicture *output, const AVPicture *input);
2164
2165 void img_resample_close(ImgReSampleContext *s);
2166
2167 /**
2168 * Allocate memory for a picture. Call avpicture_free to free it.
2169 *
2170 * @param picture the picture to be filled in.
2171 * @param pix_fmt the format of the picture.
2172 * @param width the width of the picture.
2173 * @param height the height of the picture.
2174 * @return 0 if successful, -1 if not.
2175 */
2176 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2177
2178 /* Free a picture previously allocated by avpicture_alloc. */
2179 void avpicture_free(AVPicture *picture);
2180
2181 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2182 int pix_fmt, int width, int height);
2183 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2184 unsigned char *dest, int dest_size);
2185 int avpicture_get_size(int pix_fmt, int width, int height);
2186 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2187 const char *avcodec_get_pix_fmt_name(int pix_fmt);
2188 void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2189 enum PixelFormat avcodec_get_pix_fmt(const char* name);
2190 unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2191
2192 #define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
2193 #define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
2194 #define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
2195 #define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
2196 #define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
2197 #define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
2198
2199 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2200 int has_alpha);
2201 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2202 int has_alpha, int *loss_ptr);
2203
2204 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
2205 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
2206 int img_get_alpha_info(const AVPicture *src,
2207 int pix_fmt, int width, int height);
2208
2209 /* convert among pixel formats */
2210 int img_convert(AVPicture *dst, int dst_pix_fmt,
2211 const AVPicture *src, int pix_fmt,
2212 int width, int height);
2213
2214 /* deinterlace a picture */
2215 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2216 int pix_fmt, int width, int height);
2217
2218 /* external high level API */
2219
2220 extern AVCodec *first_avcodec;
2221
2222 /* returns LIBAVCODEC_VERSION_INT constant */
2223 unsigned avcodec_version(void);
2224 /* returns LIBAVCODEC_BUILD constant */
2225 unsigned avcodec_build(void);
2226 void avcodec_init(void);
2227
2228 void register_avcodec(AVCodec *format);
2229 AVCodec *avcodec_find_encoder(enum CodecID id);
2230 AVCodec *avcodec_find_encoder_by_name(const char *name);
2231 AVCodec *avcodec_find_decoder(enum CodecID id);
2232 AVCodec *avcodec_find_decoder_by_name(const char *name);
2233 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2234
2235 void avcodec_get_context_defaults(AVCodecContext *s);
2236 AVCodecContext *avcodec_alloc_context(void);
2237 void avcodec_get_frame_defaults(AVFrame *pic);
2238 AVFrame *avcodec_alloc_frame(void);
2239
2240 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2241 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2242 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2243 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2244 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2245 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2246
2247 int avcodec_thread_init(AVCodecContext *s, int thread_count);
2248 void avcodec_thread_free(AVCodecContext *s);
2249 int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2250 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2251 //FIXME func typedef
2252
2253 /**
2254 * opens / inits the AVCodecContext.
2255 * not thread save!
2256 */
2257 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2258
2259 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2260 int *frame_size_ptr,
2261 uint8_t *buf, int buf_size);
2262 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2263 int *got_picture_ptr,
2264 uint8_t *buf, int buf_size);
2265 int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
2266 int *got_sub_ptr,
2267 const uint8_t *buf, int buf_size);
2268 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2269 int *data_size_ptr,
2270 uint8_t *buf, int buf_size);
2271 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2272 const short *samples);
2273 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2274 const AVFrame *pict);
2275 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2276 const AVSubtitle *sub);
2277
2278 int avcodec_close(AVCodecContext *avctx);
2279
2280 void avcodec_register_all(void);
2281
2282 void avcodec_flush_buffers(AVCodecContext *avctx);
2283
2284 void avcodec_default_free_buffers(AVCodecContext *s);
2285
2286 /* misc usefull functions */
2287
2288 /**
2289 * returns a single letter to describe the picture type
2290 */
2291 char av_get_pict_type_char(int pict_type);
2292
2293
2294 /* frame parsing */
2295 typedef struct AVCodecParserContext {
2296 void *priv_data;
2297 struct AVCodecParser *parser;
2298 int64_t frame_offset; /* offset of the current frame */
2299 int64_t cur_offset; /* current offset
2300 (incremented by each av_parser_parse()) */
2301 int64_t last_frame_offset; /* offset of the last frame */
2302 /* video info */
2303 int pict_type; /* XXX: put it back in AVCodecContext */
2304 int repeat_pict; /* XXX: put it back in AVCodecContext */
2305 int64_t pts; /* pts of the current frame */
2306 int64_t dts; /* dts of the current frame */
2307
2308 /* private data */
2309 int64_t last_pts;
2310 int64_t last_dts;
2311 int fetch_timestamp;
2312
2313 #define AV_PARSER_PTS_NB 4
2314 int cur_frame_start_index;
2315 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2316 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2317 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2318
2319 int flags;
2320 #define PARSER_FLAG_COMPLETE_FRAMES 0x0001
2321 } AVCodecParserContext;
2322
2323 typedef struct AVCodecParser {
2324 int codec_ids[5]; /* several codec IDs are permitted */
2325 int priv_data_size;
2326 int (*parser_init)(AVCodecParserContext *s);
2327 int (*parser_parse)(AVCodecParserContext *s,
2328 AVCodecContext *avctx,
2329 uint8_t **poutbuf, int *poutbuf_size,
2330 const uint8_t *buf, int buf_size);
2331 void (*parser_close)(AVCodecParserContext *s);
2332 int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
2333 struct AVCodecParser *next;
2334 } AVCodecParser;
2335
2336 extern AVCodecParser *av_first_parser;
2337
2338 void av_register_codec_parser(AVCodecParser *parser);
2339 AVCodecParserContext *av_parser_init(int codec_id);
2340 int av_parser_parse(AVCodecParserContext *s,
2341 AVCodecContext *avctx,
2342 uint8_t **poutbuf, int *poutbuf_size,
2343 const uint8_t *buf, int buf_size,
2344 int64_t pts, int64_t dts);
2345 int av_parser_change(AVCodecParserContext *s,
2346 AVCodecContext *avctx,
2347 uint8_t **poutbuf, int *poutbuf_size,
2348 const uint8_t *buf, int buf_size, int keyframe);
2349 void av_parser_close(AVCodecParserContext *s);
2350
2351 extern AVCodecParser mpegvideo_parser;
2352 extern AVCodecParser mpeg4video_parser;
2353 extern AVCodecParser h261_parser;
2354 extern AVCodecParser h263_parser;
2355 extern AVCodecParser h264_parser;
2356 extern AVCodecParser mjpeg_parser;
2357 extern AVCodecParser pnm_parser;
2358 extern AVCodecParser mpegaudio_parser;
2359 extern AVCodecParser ac3_parser;
2360 extern AVCodecParser dvdsub_parser;
2361 extern AVCodecParser dvbsub_parser;
2362
2363 /* memory */
2364 void *av_malloc(unsigned int size);
2365 void *av_mallocz(unsigned int size);
2366 void *av_realloc(void *ptr, unsigned int size);
2367 void av_free(void *ptr);
2368 char *av_strdup(const char *s);
2369 void av_freep(void *ptr);
2370 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2371 /* for static data only */
2372 /* call av_free_static to release all staticaly allocated tables */
2373 void av_free_static(void);
2374 void *av_mallocz_static(unsigned int size);
2375 void *av_realloc_static(void *ptr, unsigned int size);
2376
2377 /* add by bero : in adx.c */
2378 int is_adx(const unsigned char *buf,size_t bufsize);
2379
2380 void img_copy(AVPicture *dst, const AVPicture *src,
2381 int pix_fmt, int width, int height);
2382
2383 /* av_log API */
2384
2385 #include <stdarg.h>
2386
2387 #define AV_LOG_QUIET -1
2388 #define AV_LOG_ERROR 0
2389 #define AV_LOG_INFO 1
2390 #define AV_LOG_DEBUG 2
2391
2392 #ifdef __GNUC__
2393 extern void av_log(void*, int level, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 3, 4)));
2394 #else
2395 extern void av_log(void*, int level, const char *fmt, ...);
2396 #endif
2397
2398 extern void av_vlog(void*, int level, const char *fmt, va_list);
2399 extern int av_log_get_level(void);
2400 extern void av_log_set_level(int);
2401 extern void av_log_set_callback(void (*)(void*, int, const char*, va_list));
2402
2403 /* endian macros */
2404 #if !defined(BE_16) || !defined(BE_32) || !defined(LE_16) || !defined(LE_32)
2405 #define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
2406 #define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
2407 (((uint8_t*)(x))[1] << 16) | \
2408 (((uint8_t*)(x))[2] << 8) | \
2409 ((uint8_t*)(x))[3])
2410 #define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
2411 #define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \
2412 (((uint8_t*)(x))[2] << 16) | \
2413 (((uint8_t*)(x))[1] << 8) | \
2414 ((uint8_t*)(x))[0])
2415 #endif
2416
2417 extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
2418
2419 #ifdef __cplusplus
2420 }
2421 #endif
2422
2423 #endif /* AVCODEC_H */