10c26c47b59e096984f7795c09c234c14b8bcd09
[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 CODEC_ID_QDM2,
189
190 CODEC_ID_OGGTHEORA= 0x16000,
191
192 /* subtitle codecs */
193 CODEC_ID_DVD_SUBTITLE= 0x17000,
194 CODEC_ID_DVB_SUBTITLE,
195
196 CODEC_ID_MPEG2TS= 0x20000, /* _FAKE_ codec to indicate a raw MPEG2 transport
197 stream (only used by libavformat) */
198 };
199
200 /* CODEC_ID_MP3LAME is absolete */
201 #define CODEC_ID_MP3LAME CODEC_ID_MP3
202
203 enum CodecType {
204 CODEC_TYPE_UNKNOWN = -1,
205 CODEC_TYPE_VIDEO,
206 CODEC_TYPE_AUDIO,
207 CODEC_TYPE_DATA,
208 CODEC_TYPE_SUBTITLE,
209 };
210
211 /**
212 * Pixel format. Notes:
213 *
214 * PIX_FMT_RGBA32 is handled in an endian-specific manner. A RGBA
215 * color is put together as:
216 * (A << 24) | (R << 16) | (G << 8) | B
217 * This is stored as BGRA on little endian CPU architectures and ARGB on
218 * big endian CPUs.
219 *
220 * When the pixel format is palettized RGB (PIX_FMT_PAL8), the palettized
221 * image data is stored in AVFrame.data[0]. The palette is transported in
222 * AVFrame.data[1] and, is 1024 bytes long (256 4-byte entries) and is
223 * formatted the same as in PIX_FMT_RGBA32 described above (i.e., it is
224 * also endian-specific). Note also that the individual RGB palette
225 * components stored in AVFrame.data[1] should be in the range 0..255.
226 * This is important as many custom PAL8 video codecs that were designed
227 * to run on the IBM VGA graphics adapter use 6-bit palette components.
228 */
229 enum PixelFormat {
230 PIX_FMT_NONE= -1,
231 PIX_FMT_YUV420P, ///< Planar YUV 4:2:0 (1 Cr & Cb sample per 2x2 Y samples)
232 PIX_FMT_YUV422, ///< Packed pixel, Y0 Cb Y1 Cr
233 PIX_FMT_RGB24, ///< Packed pixel, 3 bytes per pixel, RGBRGB...
234 PIX_FMT_BGR24, ///< Packed pixel, 3 bytes per pixel, BGRBGR...
235 PIX_FMT_YUV422P, ///< Planar YUV 4:2:2 (1 Cr & Cb sample per 2x1 Y samples)
236 PIX_FMT_YUV444P, ///< Planar YUV 4:4:4 (1 Cr & Cb sample per 1x1 Y samples)
237 PIX_FMT_RGBA32, ///< Packed pixel, 4 bytes per pixel, BGRABGRA..., stored in cpu endianness
238 PIX_FMT_YUV410P, ///< Planar YUV 4:1:0 (1 Cr & Cb sample per 4x4 Y samples)
239 PIX_FMT_YUV411P, ///< Planar YUV 4:1:1 (1 Cr & Cb sample per 4x1 Y samples)
240 PIX_FMT_RGB565, ///< always stored in cpu endianness
241 PIX_FMT_RGB555, ///< always stored in cpu endianness, most significant bit to 1
242 PIX_FMT_GRAY8,
243 PIX_FMT_MONOWHITE, ///< 0 is white
244 PIX_FMT_MONOBLACK, ///< 0 is black
245 PIX_FMT_PAL8, ///< 8 bit with RGBA palette
246 PIX_FMT_YUVJ420P, ///< Planar YUV 4:2:0 full scale (jpeg)
247 PIX_FMT_YUVJ422P, ///< Planar YUV 4:2:2 full scale (jpeg)
248 PIX_FMT_YUVJ444P, ///< Planar YUV 4:4:4 full scale (jpeg)
249 PIX_FMT_XVMC_MPEG2_MC,///< XVideo Motion Acceleration via common packet passing(xvmc_render.h)
250 PIX_FMT_XVMC_MPEG2_IDCT,
251 PIX_FMT_UYVY422, ///< Packed pixel, Cb Y0 Cr Y1
252 PIX_FMT_UYVY411, ///< Packed pixel, Cb Y0 Y1 Cr Y2 Y3
253 PIX_FMT_NB,
254 };
255
256 /* currently unused, may be used if 24/32 bits samples ever supported */
257 enum SampleFormat {
258 SAMPLE_FMT_S16 = 0, ///< signed 16 bits
259 SAMPLE_FMT_S32, ///< signed 32 bits
260 SAMPLE_FMT_FLT, ///< float
261 SAMPLE_FMT_DBL, ///< double
262 };
263
264 /* in bytes */
265 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 131072
266
267 /**
268 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
269 * this is mainly needed because some optimized bitstream readers read
270 * 32 or 64 bit at once and could read over the end<br>
271 * Note, if the first 23 bits of the additional bytes are not 0 then damaged
272 * MPEG bitstreams could cause overread and segfault
273 */
274 #define FF_INPUT_BUFFER_PADDING_SIZE 8
275
276 /**
277 * minimum encoding buffer size.
278 * used to avoid some checks during header writing
279 */
280 #define FF_MIN_BUFFER_SIZE 16384
281
282 /* motion estimation type, EPZS by default */
283 enum Motion_Est_ID {
284 ME_ZERO = 1,
285 ME_FULL,
286 ME_LOG,
287 ME_PHODS,
288 ME_EPZS,
289 ME_X1
290 };
291
292 enum AVDiscard{
293 //we leave some space between them for extensions (drop some keyframes for intra only or drop just some bidir frames)
294 AVDISCARD_NONE =-16, ///< discard nothing
295 AVDISCARD_DEFAULT= 0, ///< discard useless packets like 0 size packets in avi
296 AVDISCARD_NONREF = 8, ///< discard all non reference
297 AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
298 AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
299 AVDISCARD_ALL = 48, ///< discard all
300 };
301
302 typedef struct RcOverride{
303 int start_frame;
304 int end_frame;
305 int qscale; // if this is 0 then quality_factor will be used instead
306 float quality_factor;
307 } RcOverride;
308
309 /* only for ME compatiblity with old apps */
310 extern int motion_estimation_method;
311
312 #define FF_MAX_B_FRAMES 8
313
314 /* encoding support
315 these flags can be passed in AVCodecContext.flags before initing
316 Note: not everything is supported yet.
317 */
318
319 #define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
320 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / Advanced prediction for H263
321 #define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
322 #define CODEC_FLAG_GMC 0x0020 ///< use GMC
323 #define CODEC_FLAG_MV0 0x0040 ///< always try a MB with MV=<0,0>
324 #define CODEC_FLAG_PART 0x0080 ///< use data partitioning
325 /* parent program gurantees that the input for b-frame containing streams is not written to
326 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
327 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
328 #define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
329 #define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
330 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
331 #define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
332 #define CODEC_FLAG_EMU_EDGE 0x4000///< don't draw edges
333 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
334 #define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
335 of only at frame boundaries */
336 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
337 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
338 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay
339 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
340 #define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
341 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
342 #define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
343 /* Fx : Flag for h263+ extra options */
344 #define CODEC_FLAG_H263P_AIC 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
345 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
346 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
347 #define CODEC_FLAG_CBP_RD 0x04000000 ///< use rate distortion optimization for cbp
348 #define CODEC_FLAG_QP_RD 0x08000000 ///< use rate distortion optimization for qp selectioon
349 #define CODEC_FLAG_H263P_AIV 0x00000008 ///< H263 Alternative inter vlc
350 #define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
351 #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
352 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
353 #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
354 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
355 #define CODEC_FLAG_CLOSED_GOP 0x80000000
356 #define CODEC_FLAG2_FAST 0x00000001 ///< allow non spec compliant speedup tricks
357 #define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< strictly enforce GOP size
358 #define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< skip bitstream encoding
359 #define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< place global headers at every keyframe instead of in extradata
360
361 /* Unsupported options :
362 * Syntax Arithmetic coding (SAC)
363 * Reference Picture Selection
364 * Independant Segment Decoding */
365 /* /Fx */
366 /* codec capabilities */
367
368 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
369 /**
370 * Codec uses get_buffer() for allocating buffers.
371 * direct rendering method 1
372 */
373 #define CODEC_CAP_DR1 0x0002
374 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
375 used */
376 #define CODEC_CAP_PARSE_ONLY 0x0004
377 #define CODEC_CAP_TRUNCATED 0x0008
378 /* codec can export data for HW decoding (XvMC) */
379 #define CODEC_CAP_HWACCEL 0x0010
380 /**
381 * codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data.
382 * if this is not set, the codec is guranteed to never be feeded with NULL data
383 */
384 #define CODEC_CAP_DELAY 0x0020
385
386 //the following defines may change, don't expect compatibility if you use them
387 #define MB_TYPE_INTRA4x4 0x0001
388 #define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
389 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME h264 specific
390 #define MB_TYPE_16x16 0x0008
391 #define MB_TYPE_16x8 0x0010
392 #define MB_TYPE_8x16 0x0020
393 #define MB_TYPE_8x8 0x0040
394 #define MB_TYPE_INTERLACED 0x0080
395 #define MB_TYPE_DIRECT2 0x0100 //FIXME
396 #define MB_TYPE_ACPRED 0x0200
397 #define MB_TYPE_GMC 0x0400
398 #define MB_TYPE_SKIP 0x0800
399 #define MB_TYPE_P0L0 0x1000
400 #define MB_TYPE_P1L0 0x2000
401 #define MB_TYPE_P0L1 0x4000
402 #define MB_TYPE_P1L1 0x8000
403 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
404 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
405 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
406 #define MB_TYPE_QUANT 0x00010000
407 #define MB_TYPE_CBP 0x00020000
408 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
409
410 /**
411 * Pan Scan area.
412 * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
413 */
414 typedef struct AVPanScan{
415 /**
416 * id.
417 * - encoding: set by user.
418 * - decoding: set by lavc
419 */
420 int id;
421
422 /**
423 * width and height in 1/16 pel
424 * - encoding: set by user.
425 * - decoding: set by lavc
426 */
427 int width;
428 int height;
429
430 /**
431 * position of the top left corner in 1/16 pel for up to 3 fields/frames.
432 * - encoding: set by user.
433 * - decoding: set by lavc
434 */
435 int16_t position[3][2];
436 }AVPanScan;
437
438 #define FF_COMMON_FRAME \
439 /**\
440 * pointer to the picture planes.\
441 * this might be different from the first allocated byte\
442 * - encoding: \
443 * - decoding: \
444 */\
445 uint8_t *data[4];\
446 int linesize[4];\
447 /**\
448 * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
449 * this isn't used by lavc unless the default get/release_buffer() is used\
450 * - encoding: \
451 * - decoding: \
452 */\
453 uint8_t *base[4];\
454 /**\
455 * 1 -> keyframe, 0-> not\
456 * - encoding: set by lavc\
457 * - decoding: set by lavc\
458 */\
459 int key_frame;\
460 \
461 /**\
462 * picture type of the frame, see ?_TYPE below.\
463 * - encoding: set by lavc for coded_picture (and set by user for input)\
464 * - decoding: set by lavc\
465 */\
466 int pict_type;\
467 \
468 /**\
469 * presentation timestamp in time_base units (time when frame should be shown to user)\
470 * if AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed\
471 * - encoding: MUST be set by user\
472 * - decoding: set by lavc\
473 */\
474 int64_t pts;\
475 \
476 /**\
477 * picture number in bitstream order.\
478 * - encoding: set by\
479 * - decoding: set by lavc\
480 */\
481 int coded_picture_number;\
482 /**\
483 * picture number in display order.\
484 * - encoding: set by\
485 * - decoding: set by lavc\
486 */\
487 int display_picture_number;\
488 \
489 /**\
490 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
491 * - encoding: set by lavc for coded_picture (and set by user for input)\
492 * - decoding: set by lavc\
493 */\
494 int quality; \
495 \
496 /**\
497 * buffer age (1->was last buffer and dint change, 2->..., ...).\
498 * set to INT_MAX if the buffer has not been used yet \
499 * - encoding: unused\
500 * - decoding: MUST be set by get_buffer()\
501 */\
502 int age;\
503 \
504 /**\
505 * is this picture used as reference\
506 * - encoding: unused\
507 * - decoding: set by lavc (before get_buffer() call))\
508 */\
509 int reference;\
510 \
511 /**\
512 * QP table\
513 * - encoding: unused\
514 * - decoding: set by lavc\
515 */\
516 int8_t *qscale_table;\
517 /**\
518 * QP store stride\
519 * - encoding: unused\
520 * - decoding: set by lavc\
521 */\
522 int qstride;\
523 \
524 /**\
525 * mbskip_table[mb]>=1 if MB didnt change\
526 * stride= mb_width = (width+15)>>4\
527 * - encoding: unused\
528 * - decoding: set by lavc\
529 */\
530 uint8_t *mbskip_table;\
531 \
532 /**\
533 * Motion vector table.\
534 * @code\
535 * example:\
536 * int mv_sample_log2= 4 - motion_subsample_log2;\
537 * int mb_width= (width+15)>>4;\
538 * int mv_stride= (mb_width << mv_sample_log2) + 1;\
539 * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
540 * @endcode\
541 * - encoding: set by user\
542 * - decoding: set by lavc\
543 */\
544 int16_t (*motion_val[2])[2];\
545 \
546 /**\
547 * Macroblock type table\
548 * mb_type_base + mb_width + 2\
549 * - encoding: set by user\
550 * - decoding: set by lavc\
551 */\
552 uint32_t *mb_type;\
553 \
554 /**\
555 * log2 of the size of the block which a single vector in motion_val represents: \
556 * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
557 * - encoding: unused\
558 * - decoding: set by lavc\
559 */\
560 uint8_t motion_subsample_log2;\
561 \
562 /**\
563 * for some private data of the user\
564 * - encoding: unused\
565 * - decoding: set by user\
566 */\
567 void *opaque;\
568 \
569 /**\
570 * error\
571 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
572 * - decoding: unused\
573 */\
574 uint64_t error[4];\
575 \
576 /**\
577 * type of the buffer (to keep track of who has to dealloc data[*])\
578 * - encoding: set by the one who allocs it\
579 * - decoding: set by the one who allocs it\
580 * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
581 */\
582 int type;\
583 \
584 /**\
585 * when decoding, this signal how much the picture must be delayed.\
586 * extra_delay = repeat_pict / (2*fps)\
587 * - encoding: unused\
588 * - decoding: set by lavc\
589 */\
590 int repeat_pict;\
591 \
592 /**\
593 * \
594 */\
595 int qscale_type;\
596 \
597 /**\
598 * The content of the picture is interlaced.\
599 * - encoding: set by user\
600 * - decoding: set by lavc (default 0)\
601 */\
602 int interlaced_frame;\
603 \
604 /**\
605 * if the content is interlaced, is top field displayed first.\
606 * - encoding: set by user\
607 * - decoding: set by lavc\
608 */\
609 int top_field_first;\
610 \
611 /**\
612 * Pan scan.\
613 * - encoding: set by user\
614 * - decoding: set by lavc\
615 */\
616 AVPanScan *pan_scan;\
617 \
618 /**\
619 * tell user application that palette has changed from previous frame.\
620 * - encoding: ??? (no palette-enabled encoder yet)\
621 * - decoding: set by lavc (default 0)\
622 */\
623 int palette_has_changed;\
624 \
625 /**\
626 * Codec suggestion on buffer type if != 0\
627 * - encoding: unused\
628 * - decoding: set by lavc (before get_buffer() call))\
629 */\
630 int buffer_hints;\
631 \
632 /**\
633 * DCT coeffitients\
634 * - encoding: unused\
635 * - decoding: set by lavc\
636 */\
637 short *dct_coeff;\
638 \
639 /**\
640 * Motion referece frame index\
641 * - encoding: set by user\
642 * - decoding: set by lavc\
643 */\
644 int8_t *ref_index[2];
645
646 #define FF_QSCALE_TYPE_MPEG1 0
647 #define FF_QSCALE_TYPE_MPEG2 1
648
649 #define FF_BUFFER_TYPE_INTERNAL 1
650 #define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
651 #define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewhere else, don't dealloc image (data/base), all other tables are not shared
652 #define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, don't dealloc anything
653
654
655 #define FF_I_TYPE 1 // Intra
656 #define FF_P_TYPE 2 // Predicted
657 #define FF_B_TYPE 3 // Bi-dir predicted
658 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
659 #define FF_SI_TYPE 5
660 #define FF_SP_TYPE 6
661
662 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore)
663 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
664 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
665 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
666
667 /**
668 * Audio Video Frame.
669 */
670 typedef struct AVFrame {
671 FF_COMMON_FRAME
672 } AVFrame;
673
674 #define DEFAULT_FRAME_RATE_BASE 1001000
675
676 /**
677 * Used by av_log
678 */
679 typedef struct AVCLASS AVClass;
680 struct AVCLASS {
681 const char* class_name;
682 const char* (*item_name)(void*); /* actually passing a pointer to an AVCodecContext
683 or AVFormatContext, which begin with an AVClass.
684 Needed because av_log is in libavcodec and has no visibility
685 of AVIn/OutputFormat */
686 struct AVOption *option;
687 };
688
689 /**
690 * main external api structure.
691 */
692 typedef struct AVCodecContext {
693 /**
694 * Info on struct for av_log
695 * - set by avcodec_alloc_context
696 */
697 AVClass *av_class;
698 /**
699 * the average bitrate.
700 * - encoding: set by user. unused for constant quantizer encoding
701 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
702 */
703 int bit_rate;
704
705 /**
706 * number of bits the bitstream is allowed to diverge from the reference.
707 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
708 * - encoding: set by user. unused for constant quantizer encoding
709 * - decoding: unused
710 */
711 int bit_rate_tolerance;
712
713 /**
714 * CODEC_FLAG_*.
715 * - encoding: set by user.
716 * - decoding: set by user.
717 */
718 int flags;
719
720 /**
721 * some codecs needs additionnal format info. It is stored here
722 * - encoding: set by user.
723 * - decoding: set by lavc. (FIXME is this ok?)
724 */
725 int sub_id;
726
727 /**
728 * motion estimation algorithm used for video coding.
729 * - encoding: MUST be set by user.
730 * - decoding: unused
731 */
732 int me_method;
733
734 /**
735 * some codecs need / can use extra-data like huffman tables.
736 * mjpeg: huffman tables
737 * rv10: additional flags
738 * mpeg4: global headers (they can be in the bitstream or here)
739 * the allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
740 * then extradata_size to avoid prolems if its read with the bitstream reader
741 * - encoding: set/allocated/freed by lavc.
742 * - decoding: set/allocated/freed by user.
743 */
744 void *extradata;
745 int extradata_size;
746
747 /**
748 * this is the fundamental unit of time (in seconds) in terms
749 * of which frame timestamps are represented. for fixed-fps content,
750 * timebase should be 1/framerate and timestamp increments should be
751 * identically 1.
752 * - encoding: MUST be set by user
753 * - decoding: set by lavc.
754 */
755 AVRational time_base;
756
757 /* video only */
758 /**
759 * picture width / height.
760 * - encoding: MUST be set by user.
761 * - decoding: set by lavc.
762 * Note, for compatibility its possible to set this instead of
763 * coded_width/height before decoding
764 */
765 int width, height;
766
767 #define FF_ASPECT_EXTENDED 15
768
769 /**
770 * the number of pictures in a group of pitures, or 0 for intra_only.
771 * - encoding: set by user.
772 * - decoding: unused
773 */
774 int gop_size;
775
776 /**
777 * pixel format, see PIX_FMT_xxx.
778 * - encoding: set by user.
779 * - decoding: set by lavc.
780 */
781 enum PixelFormat pix_fmt;
782
783 /**
784 * Frame rate emulation. If not zero lower layer (i.e. format handler)
785 * has to read frames at native frame rate.
786 * - encoding: set by user.
787 * - decoding: unused.
788 */
789 int rate_emu;
790
791 /**
792 * if non NULL, 'draw_horiz_band' is called by the libavcodec
793 * decoder to draw an horizontal band. It improve cache usage. Not
794 * all codecs can do that. You must check the codec capabilities
795 * before
796 * - encoding: unused
797 * - decoding: set by user.
798 * @param height the height of the slice
799 * @param y the y position of the slice
800 * @param type 1->top field, 2->bottom field, 3->frame
801 * @param offset offset into the AVFrame.data from which the slice should be read
802 */
803 void (*draw_horiz_band)(struct AVCodecContext *s,
804 const AVFrame *src, int offset[4],
805 int y, int type, int height);
806
807 /* audio only */
808 int sample_rate; ///< samples per sec
809 int channels;
810
811 /**
812 * audio sample format.
813 * - encoding: set by user.
814 * - decoding: set by lavc.
815 */
816 enum SampleFormat sample_fmt; ///< sample format, currenly unused
817
818 /* the following data should not be initialized */
819 /**
820 * samples per packet. initialized when calling 'init'
821 */
822 int frame_size;
823 int frame_number; ///< audio or video frame number
824 int real_pict_num; ///< returns the real picture number of previous encoded frame
825
826 /**
827 * number of frames the decoded output will be delayed relative to
828 * the encoded input.
829 * - encoding: set by lavc.
830 * - decoding: unused
831 */
832 int delay;
833
834 /* - encoding parameters */
835 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
836 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
837
838 /**
839 * minimum quantizer.
840 * - encoding: set by user.
841 * - decoding: unused
842 */
843 int qmin;
844
845 /**
846 * maximum quantizer.
847 * - encoding: set by user.
848 * - decoding: unused
849 */
850 int qmax;
851
852 /**
853 * maximum quantizer difference etween frames.
854 * - encoding: set by user.
855 * - decoding: unused
856 */
857 int max_qdiff;
858
859 /**
860 * maximum number of b frames between non b frames.
861 * note: the output will be delayed by max_b_frames+1 relative to the input
862 * - encoding: set by user.
863 * - decoding: unused
864 */
865 int max_b_frames;
866
867 /**
868 * qscale factor between ip and b frames.
869 * - encoding: set by user.
870 * - decoding: unused
871 */
872 float b_quant_factor;
873
874 /** obsolete FIXME remove */
875 int rc_strategy;
876 int b_frame_strategy;
877
878 /**
879 * hurry up amount.
880 * deprecated in favor of skip_idct and skip_frame
881 * - encoding: unused
882 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
883 */
884 int hurry_up;
885
886 struct AVCodec *codec;
887
888 void *priv_data;
889
890 /* unused, FIXME remove*/
891 int rtp_mode;
892
893 int rtp_payload_size; /* The size of the RTP payload: the coder will */
894 /* do it's best to deliver a chunk with size */
895 /* below rtp_payload_size, the chunk will start */
896 /* with a start code on some codecs like H.263 */
897 /* This doesn't take account of any particular */
898 /* headers inside the transmited RTP payload */
899
900
901 /* The RTP callback: This function is called */
902 /* every time the encoder has a packet to send */
903 /* Depends on the encoder if the data starts */
904 /* with a Start Code (it should) H.263 does. */
905 /* mb_nb contains the number of macroblocks */
906 /* encoded in the RTP payload */
907 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
908
909 /* statistics, used for 2-pass encoding */
910 int mv_bits;
911 int header_bits;
912 int i_tex_bits;
913 int p_tex_bits;
914 int i_count;
915 int p_count;
916 int skip_count;
917 int misc_bits;
918
919 /**
920 * number of bits used for the previously encoded frame.
921 * - encoding: set by lavc
922 * - decoding: unused
923 */
924 int frame_bits;
925
926 /**
927 * private data of the user, can be used to carry app specific stuff.
928 * - encoding: set by user
929 * - decoding: set by user
930 */
931 void *opaque;
932
933 char codec_name[32];
934 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
935 enum CodecID codec_id; /* see CODEC_ID_xxx */
936
937 /**
938 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
939 * this is used to workaround some encoder bugs
940 * - encoding: set by user, if not then the default based on codec_id will be used
941 * - decoding: set by user, will be converted to upper case by lavc during init
942 */
943 unsigned int codec_tag;
944
945 /**
946 * workaround bugs in encoders which sometimes cannot be detected automatically.
947 * - encoding: set by user
948 * - decoding: set by user
949 */
950 int workaround_bugs;
951 #define FF_BUG_AUTODETECT 1 ///< autodetection
952 #define FF_BUG_OLD_MSMPEG4 2
953 #define FF_BUG_XVID_ILACE 4
954 #define FF_BUG_UMP4 8
955 #define FF_BUG_NO_PADDING 16
956 #define FF_BUG_AMV 32
957 #define FF_BUG_AC_VLC 0 ///< will be removed, libavcodec can now handle these non compliant files by default
958 #define FF_BUG_QPEL_CHROMA 64
959 #define FF_BUG_STD_QPEL 128
960 #define FF_BUG_QPEL_CHROMA2 256
961 #define FF_BUG_DIRECT_BLOCKSIZE 512
962 #define FF_BUG_EDGE 1024
963 #define FF_BUG_HPEL_CHROMA 2048
964 #define FF_BUG_DC_CLIP 4096
965 #define FF_BUG_MS 8192 ///< workaround various bugs in microsofts broken decoders
966 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
967
968 /**
969 * luma single coeff elimination threshold.
970 * - encoding: set by user
971 * - decoding: unused
972 */
973 int luma_elim_threshold;
974
975 /**
976 * chroma single coeff elimination threshold.
977 * - encoding: set by user
978 * - decoding: unused
979 */
980 int chroma_elim_threshold;
981
982 /**
983 * strictly follow the std (MPEG4, ...).
984 * - encoding: set by user
985 * - decoding: unused
986 */
987 int strict_std_compliance;
988 #define FF_COMPLIANCE_VERY_STRICT 2 ///< strictly conform to a older more strict version of the spec or reference software
989 #define FF_COMPLIANCE_STRICT 1 ///< strictly conform to all the things in the spec no matter what consequences
990 #define FF_COMPLIANCE_NORMAL 0
991 #define FF_COMPLIANCE_INOFFICIAL -1 ///< allow inofficial extensions
992 #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< allow non standarized experimental things
993
994 /**
995 * qscale offset between ip and b frames.
996 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
997 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
998 * - encoding: set by user.
999 * - decoding: unused
1000 */
1001 float b_quant_offset;
1002
1003 /**
1004 * error resilience higher values will detect more errors but may missdetect
1005 * some more or less valid parts as errors.
1006 * - encoding: unused
1007 * - decoding: set by user
1008 */
1009 int error_resilience;
1010 #define FF_ER_CAREFUL 1
1011 #define FF_ER_COMPLIANT 2
1012 #define FF_ER_AGGRESSIVE 3
1013 #define FF_ER_VERY_AGGRESSIVE 4
1014
1015 /**
1016 * called at the beginning of each frame to get a buffer for it.
1017 * if pic.reference is set then the frame will be read later by lavc
1018 * avcodec_align_dimensions() should be used to find the required width and
1019 * height, as they normally need to be rounded up to the next multiple of 16
1020 * - encoding: unused
1021 * - decoding: set by lavc, user can override
1022 */
1023 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1024
1025 /**
1026 * called to release buffers which where allocated with get_buffer.
1027 * a released buffer can be reused in get_buffer()
1028 * pic.data[*] must be set to NULL
1029 * - encoding: unused
1030 * - decoding: set by lavc, user can override
1031 */
1032 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1033
1034 /**
1035 * if 1 the stream has a 1 frame delay during decoding.
1036 * - encoding: set by lavc
1037 * - decoding: set by lavc
1038 */
1039 int has_b_frames;
1040
1041 /**
1042 * number of bytes per packet if constant and known or 0
1043 * used by some WAV based audio codecs
1044 */
1045 int block_align;
1046
1047 int parse_only; /* - decoding only: if true, only parsing is done
1048 (function avcodec_parse_frame()). The frame
1049 data is returned. Only MPEG codecs support this now. */
1050
1051 /**
1052 * 0-> h263 quant 1-> mpeg quant.
1053 * - encoding: set by user.
1054 * - decoding: unused
1055 */
1056 int mpeg_quant;
1057
1058 /**
1059 * pass1 encoding statistics output buffer.
1060 * - encoding: set by lavc
1061 * - decoding: unused
1062 */
1063 char *stats_out;
1064
1065 /**
1066 * pass2 encoding statistics input buffer.
1067 * concatenated stuff from stats_out of pass1 should be placed here
1068 * - encoding: allocated/set/freed by user
1069 * - decoding: unused
1070 */
1071 char *stats_in;
1072
1073 /**
1074 * ratecontrol qmin qmax limiting method.
1075 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
1076 * - encoding: set by user.
1077 * - decoding: unused
1078 */
1079 float rc_qsquish;
1080
1081 float rc_qmod_amp;
1082 int rc_qmod_freq;
1083
1084 /**
1085 * ratecontrol override, see RcOverride.
1086 * - encoding: allocated/set/freed by user.
1087 * - decoding: unused
1088 */
1089 RcOverride *rc_override;
1090 int rc_override_count;
1091
1092 /**
1093 * rate control equation.
1094 * - encoding: set by user
1095 * - decoding: unused
1096 */
1097 char *rc_eq;
1098
1099 /**
1100 * maximum bitrate.
1101 * - encoding: set by user.
1102 * - decoding: unused
1103 */
1104 int rc_max_rate;
1105
1106 /**
1107 * minimum bitrate.
1108 * - encoding: set by user.
1109 * - decoding: unused
1110 */
1111 int rc_min_rate;
1112
1113 /**
1114 * decoder bitstream buffer size.
1115 * - encoding: set by user.
1116 * - decoding: unused
1117 */
1118 int rc_buffer_size;
1119 float rc_buffer_aggressivity;
1120
1121 /**
1122 * qscale factor between p and i frames.
1123 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1124 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1125 * - encoding: set by user.
1126 * - decoding: unused
1127 */
1128 float i_quant_factor;
1129
1130 /**
1131 * qscale offset between p and i frames.
1132 * - encoding: set by user.
1133 * - decoding: unused
1134 */
1135 float i_quant_offset;
1136
1137 /**
1138 * initial complexity for pass1 ratecontrol.
1139 * - encoding: set by user.
1140 * - decoding: unused
1141 */
1142 float rc_initial_cplx;
1143
1144 /**
1145 * dct algorithm, see FF_DCT_* below.
1146 * - encoding: set by user
1147 * - decoding: unused
1148 */
1149 int dct_algo;
1150 #define FF_DCT_AUTO 0
1151 #define FF_DCT_FASTINT 1
1152 #define FF_DCT_INT 2
1153 #define FF_DCT_MMX 3
1154 #define FF_DCT_MLIB 4
1155 #define FF_DCT_ALTIVEC 5
1156 #define FF_DCT_FAAN 6
1157
1158 /**
1159 * luminance masking (0-> disabled).
1160 * - encoding: set by user
1161 * - decoding: unused
1162 */
1163 float lumi_masking;
1164
1165 /**
1166 * temporary complexity masking (0-> disabled).
1167 * - encoding: set by user
1168 * - decoding: unused
1169 */
1170 float temporal_cplx_masking;
1171
1172 /**
1173 * spatial complexity masking (0-> disabled).
1174 * - encoding: set by user
1175 * - decoding: unused
1176 */
1177 float spatial_cplx_masking;
1178
1179 /**
1180 * p block masking (0-> disabled).
1181 * - encoding: set by user
1182 * - decoding: unused
1183 */
1184 float p_masking;
1185
1186 /**
1187 * darkness masking (0-> disabled).
1188 * - encoding: set by user
1189 * - decoding: unused
1190 */
1191 float dark_masking;
1192
1193
1194 /* for binary compatibility */
1195 int unused;
1196
1197 /**
1198 * idct algorithm, see FF_IDCT_* below.
1199 * - encoding: set by user
1200 * - decoding: set by user
1201 */
1202 int idct_algo;
1203 #define FF_IDCT_AUTO 0
1204 #define FF_IDCT_INT 1
1205 #define FF_IDCT_SIMPLE 2
1206 #define FF_IDCT_SIMPLEMMX 3
1207 #define FF_IDCT_LIBMPEG2MMX 4
1208 #define FF_IDCT_PS2 5
1209 #define FF_IDCT_MLIB 6
1210 #define FF_IDCT_ARM 7
1211 #define FF_IDCT_ALTIVEC 8
1212 #define FF_IDCT_SH4 9
1213 #define FF_IDCT_SIMPLEARM 10
1214 #define FF_IDCT_H264 11
1215 #define FF_IDCT_VP3 12
1216 #define FF_IDCT_IPP 13
1217 #define FF_IDCT_XVIDMMX 14
1218
1219 /**
1220 * slice count.
1221 * - encoding: set by lavc
1222 * - decoding: set by user (or 0)
1223 */
1224 int slice_count;
1225 /**
1226 * slice offsets in the frame in bytes.
1227 * - encoding: set/allocated by lavc
1228 * - decoding: set/allocated by user (or NULL)
1229 */
1230 int *slice_offset;
1231
1232 /**
1233 * error concealment flags.
1234 * - encoding: unused
1235 * - decoding: set by user
1236 */
1237 int error_concealment;
1238 #define FF_EC_GUESS_MVS 1
1239 #define FF_EC_DEBLOCK 2
1240
1241 /**
1242 * dsp_mask could be add used to disable unwanted CPU features
1243 * CPU features (i.e. MMX, SSE. ...)
1244 *
1245 * with FORCE flag you may instead enable given CPU features
1246 * (Dangerous: usable in case of misdetection, improper usage however will
1247 * result into program crash)
1248 */
1249 unsigned dsp_mask;
1250 #define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
1251 /* lower 16 bits - CPU features */
1252 #ifdef HAVE_MMX
1253 #define FF_MM_MMX 0x0001 /* standard MMX */
1254 #define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
1255 #define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
1256 #define FF_MM_SSE 0x0008 /* SSE functions */
1257 #define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
1258 #define FF_MM_3DNOWEXT 0x0020 /* AMD 3DNowExt */
1259 #endif /* HAVE_MMX */
1260 #ifdef HAVE_IWMMXT
1261 #define FF_MM_IWMMXT 0x0100 /* XScale IWMMXT */
1262 #endif /* HAVE_IWMMXT */
1263
1264 /**
1265 * bits per sample/pixel from the demuxer (needed for huffyuv).
1266 * - encoding: set by lavc
1267 * - decoding: set by user
1268 */
1269 int bits_per_sample;
1270
1271 /**
1272 * prediction method (needed for huffyuv).
1273 * - encoding: set by user
1274 * - decoding: unused
1275 */
1276 int prediction_method;
1277 #define FF_PRED_LEFT 0
1278 #define FF_PRED_PLANE 1
1279 #define FF_PRED_MEDIAN 2
1280
1281 /**
1282 * sample aspect ratio (0 if unknown).
1283 * numerator and denominator must be relative prime and smaller then 256 for some video standards
1284 * - encoding: set by user.
1285 * - decoding: set by lavc.
1286 */
1287 AVRational sample_aspect_ratio;
1288
1289 /**
1290 * the picture in the bitstream.
1291 * - encoding: set by lavc
1292 * - decoding: set by lavc
1293 */
1294 AVFrame *coded_frame;
1295
1296 /**
1297 * debug.
1298 * - encoding: set by user.
1299 * - decoding: set by user.
1300 */
1301 int debug;
1302 #define FF_DEBUG_PICT_INFO 1
1303 #define FF_DEBUG_RC 2
1304 #define FF_DEBUG_BITSTREAM 4
1305 #define FF_DEBUG_MB_TYPE 8
1306 #define FF_DEBUG_QP 16
1307 #define FF_DEBUG_MV 32
1308 #define FF_DEBUG_DCT_COEFF 0x00000040
1309 #define FF_DEBUG_SKIP 0x00000080
1310 #define FF_DEBUG_STARTCODE 0x00000100
1311 #define FF_DEBUG_PTS 0x00000200
1312 #define FF_DEBUG_ER 0x00000400
1313 #define FF_DEBUG_MMCO 0x00000800
1314 #define FF_DEBUG_BUGS 0x00001000
1315 #define FF_DEBUG_VIS_QP 0x00002000
1316 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1317
1318 /**
1319 * debug.
1320 * - encoding: set by user.
1321 * - decoding: set by user.
1322 */
1323 int debug_mv;
1324 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1325 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1326 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1327
1328 /**
1329 * error.
1330 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1331 * - decoding: unused
1332 */
1333 uint64_t error[4];
1334
1335 /**
1336 * minimum MB quantizer.
1337 * - encoding: unused
1338 * - decoding: unused
1339 */
1340 int mb_qmin;
1341
1342 /**
1343 * maximum MB quantizer.
1344 * - encoding: unused
1345 * - decoding: unused
1346 */
1347 int mb_qmax;
1348
1349 /**
1350 * motion estimation compare function.
1351 * - encoding: set by user.
1352 * - decoding: unused
1353 */
1354 int me_cmp;
1355 /**
1356 * subpixel motion estimation compare function.
1357 * - encoding: set by user.
1358 * - decoding: unused
1359 */
1360 int me_sub_cmp;
1361 /**
1362 * macroblock compare function (not supported yet).
1363 * - encoding: set by user.
1364 * - decoding: unused
1365 */
1366 int mb_cmp;
1367 /**
1368 * interlaced dct compare function
1369 * - encoding: set by user.
1370 * - decoding: unused
1371 */
1372 int ildct_cmp;
1373 #define FF_CMP_SAD 0
1374 #define FF_CMP_SSE 1
1375 #define FF_CMP_SATD 2
1376 #define FF_CMP_DCT 3
1377 #define FF_CMP_PSNR 4
1378 #define FF_CMP_BIT 5
1379 #define FF_CMP_RD 6
1380 #define FF_CMP_ZERO 7
1381 #define FF_CMP_VSAD 8
1382 #define FF_CMP_VSSE 9
1383 #define FF_CMP_NSSE 10
1384 #define FF_CMP_W53 11
1385 #define FF_CMP_W97 12
1386 #define FF_CMP_DCTMAX 13
1387 #define FF_CMP_CHROMA 256
1388
1389 /**
1390 * ME diamond size & shape.
1391 * - encoding: set by user.
1392 * - decoding: unused
1393 */
1394 int dia_size;
1395
1396 /**
1397 * amount of previous MV predictors (2a+1 x 2a+1 square).
1398 * - encoding: set by user.
1399 * - decoding: unused
1400 */
1401 int last_predictor_count;
1402
1403 /**
1404 * pre pass for motion estimation.
1405 * - encoding: set by user.
1406 * - decoding: unused
1407 */
1408 int pre_me;
1409
1410 /**
1411 * motion estimation pre pass compare function.
1412 * - encoding: set by user.
1413 * - decoding: unused
1414 */
1415 int me_pre_cmp;
1416
1417 /**
1418 * ME pre pass diamond size & shape.
1419 * - encoding: set by user.
1420 * - decoding: unused
1421 */
1422 int pre_dia_size;
1423
1424 /**
1425 * subpel ME quality.
1426 * - encoding: set by user.
1427 * - decoding: unused
1428 */
1429 int me_subpel_quality;
1430
1431 /**
1432 * callback to negotiate the pixelFormat.
1433 * @param fmt is the list of formats which are supported by the codec,
1434 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1435 * the first is allways the native one
1436 * @return the choosen format
1437 * - encoding: unused
1438 * - decoding: set by user, if not set then the native format will always be choosen
1439 */
1440 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1441
1442 /**
1443 * DTG active format information (additionnal aspect ratio
1444 * information only used in DVB MPEG2 transport streams). 0 if
1445 * not set.
1446 *
1447 * - encoding: unused.
1448 * - decoding: set by decoder
1449 */
1450 int dtg_active_format;
1451 #define FF_DTG_AFD_SAME 8
1452 #define FF_DTG_AFD_4_3 9
1453 #define FF_DTG_AFD_16_9 10
1454 #define FF_DTG_AFD_14_9 11
1455 #define FF_DTG_AFD_4_3_SP_14_9 13
1456 #define FF_DTG_AFD_16_9_SP_14_9 14
1457 #define FF_DTG_AFD_SP_4_3 15
1458
1459 /**
1460 * Maximum motion estimation search range in subpel units.
1461 * if 0 then no limit
1462 *
1463 * - encoding: set by user.
1464 * - decoding: unused.
1465 */
1466 int me_range;
1467
1468 /**
1469 * intra quantizer bias.
1470 * - encoding: set by user.
1471 * - decoding: unused
1472 */
1473 int intra_quant_bias;
1474 #define FF_DEFAULT_QUANT_BIAS 999999
1475
1476 /**
1477 * inter quantizer bias.
1478 * - encoding: set by user.
1479 * - decoding: unused
1480 */
1481 int inter_quant_bias;
1482
1483 /**
1484 * color table ID.
1485 * - encoding: unused.
1486 * - decoding: which clrtable should be used for 8bit RGB images
1487 * table have to be stored somewhere FIXME
1488 */
1489 int color_table_id;
1490
1491 /**
1492 * internal_buffer count.
1493 * Don't touch, used by lavc default_get_buffer()
1494 */
1495 int internal_buffer_count;
1496
1497 /**
1498 * internal_buffers.
1499 * Don't touch, used by lavc default_get_buffer()
1500 */
1501 void *internal_buffer;
1502
1503 #define FF_LAMBDA_SHIFT 7
1504 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1505 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1506 #define FF_LAMBDA_MAX (256*128-1)
1507
1508 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1509 /**
1510 * global quality for codecs which cannot change it per frame.
1511 * this should be proportional to MPEG1/2/4 qscale.
1512 * - encoding: set by user.
1513 * - decoding: unused
1514 */
1515 int global_quality;
1516
1517 #define FF_CODER_TYPE_VLC 0
1518 #define FF_CODER_TYPE_AC 1
1519 /**
1520 * coder type
1521 * - encoding: set by user.
1522 * - decoding: unused
1523 */
1524 int coder_type;
1525
1526 /**
1527 * context model
1528 * - encoding: set by user.
1529 * - decoding: unused
1530 */
1531 int context_model;
1532
1533 /**
1534 * slice flags
1535 * - encoding: unused
1536 * - decoding: set by user.
1537 */
1538 int slice_flags;
1539 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1540 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1541 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1542
1543 /**
1544 * XVideo Motion Acceleration
1545 * - encoding: forbidden
1546 * - decoding: set by decoder
1547 */
1548 int xvmc_acceleration;
1549
1550 /**
1551 * macroblock decision mode
1552 * - encoding: set by user.
1553 * - decoding: unused
1554 */
1555 int mb_decision;
1556 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1557 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1558 #define FF_MB_DECISION_RD 2 ///< rate distoration
1559
1560 /**
1561 * custom intra quantization matrix
1562 * - encoding: set by user, can be NULL
1563 * - decoding: set by lavc
1564 */
1565 uint16_t *intra_matrix;
1566
1567 /**
1568 * custom inter quantization matrix
1569 * - encoding: set by user, can be NULL
1570 * - decoding: set by lavc
1571 */
1572 uint16_t *inter_matrix;
1573
1574 /**
1575 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1576 * this is used to workaround some encoder bugs
1577 * - encoding: unused
1578 * - decoding: set by user, will be converted to upper case by lavc during init
1579 */
1580 unsigned int stream_codec_tag;
1581
1582 /**
1583 * scene change detection threshold.
1584 * 0 is default, larger means fewer detected scene changes
1585 * - encoding: set by user.
1586 * - decoding: unused
1587 */
1588 int scenechange_threshold;
1589
1590 /**
1591 * minimum lagrange multipler
1592 * - encoding: set by user.
1593 * - decoding: unused
1594 */
1595 int lmin;
1596
1597 /**
1598 * maximum lagrange multipler
1599 * - encoding: set by user.
1600 * - decoding: unused
1601 */
1602 int lmax;
1603
1604 /**
1605 * Palette control structure
1606 * - encoding: ??? (no palette-enabled encoder yet)
1607 * - decoding: set by user.
1608 */
1609 struct AVPaletteControl *palctrl;
1610
1611 /**
1612 * noise reduction strength
1613 * - encoding: set by user.
1614 * - decoding: unused
1615 */
1616 int noise_reduction;
1617
1618 /**
1619 * called at the beginning of a frame to get cr buffer for it.
1620 * buffer type (size, hints) must be the same. lavc won't check it.
1621 * lavc will pass previous buffer in pic, function should return
1622 * same buffer or new buffer with old frame "painted" into it.
1623 * if pic.data[0] == NULL must behave like get_buffer().
1624 * - encoding: unused
1625 * - decoding: set by lavc, user can override
1626 */
1627 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1628
1629 /**
1630 * number of bits which should be loaded into the rc buffer before decoding starts
1631 * - encoding: set by user.
1632 * - decoding: unused
1633 */
1634 int rc_initial_buffer_occupancy;
1635
1636 /**
1637 *
1638 * - encoding: set by user.
1639 * - decoding: unused
1640 */
1641 int inter_threshold;
1642
1643 /**
1644 * CODEC_FLAG2_*.
1645 * - encoding: set by user.
1646 * - decoding: set by user.
1647 */
1648 int flags2;
1649
1650 /**
1651 * simulates errors in the bitstream to test error concealment.
1652 * - encoding: set by user.
1653 * - decoding: unused.
1654 */
1655 int error_rate;
1656
1657 /**
1658 * MP3 antialias algorithm, see FF_AA_* below.
1659 * - encoding: unused
1660 * - decoding: set by user
1661 */
1662 int antialias_algo;
1663 #define FF_AA_AUTO 0
1664 #define FF_AA_FASTINT 1 //not implemented yet
1665 #define FF_AA_INT 2
1666 #define FF_AA_FLOAT 3
1667 /**
1668 * Quantizer noise shaping.
1669 * - encoding: set by user
1670 * - decoding: unused
1671 */
1672 int quantizer_noise_shaping;
1673
1674 /**
1675 * Thread count.
1676 * is used to decide how many independant tasks should be passed to execute()
1677 * - encoding: set by user
1678 * - decoding: set by user
1679 */
1680 int thread_count;
1681
1682 /**
1683 * the codec may call this to execute several independant things. it will return only after
1684 * finishing all tasks, the user may replace this with some multithreaded implementation, the
1685 * default implementation will execute the parts serially
1686 * @param count the number of things to execute
1687 * - encoding: set by lavc, user can override
1688 * - decoding: set by lavc, user can override
1689 */
1690 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1691
1692 /**
1693 * Thread opaque.
1694 * can be used by execute() to store some per AVCodecContext stuff.
1695 * - encoding: set by execute()
1696 * - decoding: set by execute()
1697 */
1698 void *thread_opaque;
1699
1700 /**
1701 * Motion estimation threshold. under which no motion estimation is
1702 * performed, but instead the user specified motion vectors are used
1703 *
1704 * - encoding: set by user
1705 * - decoding: unused
1706 */
1707 int me_threshold;
1708
1709 /**
1710 * Macroblock threshold. under which the user specified macroblock types will be used
1711 * - encoding: set by user
1712 * - decoding: unused
1713 */
1714 int mb_threshold;
1715
1716 /**
1717 * precision of the intra dc coefficient - 8.
1718 * - encoding: set by user
1719 * - decoding: unused
1720 */
1721 int intra_dc_precision;
1722
1723 /**
1724 * noise vs. sse weight for the nsse comparsion function.
1725 * - encoding: set by user
1726 * - decoding: unused
1727 */
1728 int nsse_weight;
1729
1730 /**
1731 * number of macroblock rows at the top which are skipped.
1732 * - encoding: unused
1733 * - decoding: set by user
1734 */
1735 int skip_top;
1736
1737 /**
1738 * number of macroblock rows at the bottom which are skipped.
1739 * - encoding: unused
1740 * - decoding: set by user
1741 */
1742 int skip_bottom;
1743
1744 /**
1745 * profile
1746 * - encoding: set by user
1747 * - decoding: set by lavc
1748 */
1749 int profile;
1750 #define FF_PROFILE_UNKNOWN -99
1751
1752 /**
1753 * level
1754 * - encoding: set by user
1755 * - decoding: set by lavc
1756 */
1757 int level;
1758 #define FF_LEVEL_UNKNOWN -99
1759
1760 /**
1761 * low resolution decoding. 1-> 1/2 size, 2->1/4 size
1762 * - encoding: unused
1763 * - decoding: set by user
1764 */
1765 int lowres;
1766
1767 /**
1768 * bitsream width / height. may be different from width/height if lowres
1769 * or other things are used
1770 * - encoding: unused
1771 * - decoding: set by user before init if known, codec should override / dynamically change if needed
1772 */
1773 int coded_width, coded_height;
1774
1775 /**
1776 * frame skip threshold
1777 * - encoding: set by user
1778 * - decoding: unused
1779 */
1780 int frame_skip_threshold;
1781
1782 /**
1783 * frame skip factor
1784 * - encoding: set by user
1785 * - decoding: unused
1786 */
1787 int frame_skip_factor;
1788
1789 /**
1790 * frame skip exponent
1791 * - encoding: set by user
1792 * - decoding: unused
1793 */
1794 int frame_skip_exp;
1795
1796 /**
1797 * frame skip comparission function
1798 * - encoding: set by user.
1799 * - decoding: unused
1800 */
1801 int frame_skip_cmp;
1802
1803 /**
1804 * border processing masking. raises the quantizer for mbs on the borders
1805 * of the picture.
1806 * - encoding: set by user
1807 * - decoding: unused
1808 */
1809 float border_masking;
1810
1811 /**
1812 * minimum MB lagrange multipler.
1813 * - encoding: set by user.
1814 * - decoding: unused
1815 */
1816 int mb_lmin;
1817
1818 /**
1819 * maximum MB lagrange multipler.
1820 * - encoding: set by user.
1821 * - decoding: unused
1822 */
1823 int mb_lmax;
1824
1825 /**
1826 *
1827 * - encoding: set by user.
1828 * - decoding: unused
1829 */
1830 int me_penalty_compensation;
1831
1832 /**
1833 *
1834 * - encoding: unused
1835 * - decoding: set by user.
1836 */
1837 enum AVDiscard skip_loop_filter;
1838
1839 /**
1840 *
1841 * - encoding: unused
1842 * - decoding: set by user.
1843 */
1844 enum AVDiscard skip_idct;
1845
1846 /**
1847 *
1848 * - encoding: unused
1849 * - decoding: set by user.
1850 */
1851 enum AVDiscard skip_frame;
1852 } AVCodecContext;
1853
1854 /**
1855 * AVCodec.
1856 */
1857 typedef struct AVCodec {
1858 const char *name;
1859 enum CodecType type;
1860 enum CodecID id;
1861 int priv_data_size;
1862 int (*init)(AVCodecContext *);
1863 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
1864 int (*close)(AVCodecContext *);
1865 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
1866 uint8_t *buf, int buf_size);
1867 int capabilities;
1868 #if LIBAVCODEC_VERSION_INT < ((50<<16)+(0<<8)+0)
1869 void *dummy; // FIXME remove next time we break binary compatibility
1870 #endif
1871 struct AVCodec *next;
1872 void (*flush)(AVCodecContext *);
1873 const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
1874 const enum PixelFormat *pix_fmts; ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
1875 } AVCodec;
1876
1877 /**
1878 * four components are given, that's all.
1879 * the last component is alpha
1880 */
1881 typedef struct AVPicture {
1882 uint8_t *data[4];
1883 int linesize[4]; ///< number of bytes per line
1884 } AVPicture;
1885
1886 /**
1887 * AVPaletteControl
1888 * This structure defines a method for communicating palette changes
1889 * between and demuxer and a decoder.
1890 */
1891 #define AVPALETTE_SIZE 1024
1892 #define AVPALETTE_COUNT 256
1893 typedef struct AVPaletteControl {
1894
1895 /* demuxer sets this to 1 to indicate the palette has changed;
1896 * decoder resets to 0 */
1897 int palette_changed;
1898
1899 /* 4-byte ARGB palette entries, stored in native byte order; note that
1900 * the individual palette components should be on a 8-bit scale; if
1901 * the palette data comes from a IBM VGA native format, the component
1902 * data is probably 6 bits in size and needs to be scaled */
1903 unsigned int palette[AVPALETTE_COUNT];
1904
1905 } AVPaletteControl;
1906
1907 typedef struct AVSubtitleRect {
1908 uint16_t x;
1909 uint16_t y;
1910 uint16_t w;
1911 uint16_t h;
1912 uint16_t nb_colors;
1913 int linesize;
1914 uint32_t *rgba_palette;
1915 uint8_t *bitmap;
1916 } AVSubtitleRect;
1917
1918 typedef struct AVSubtitle {
1919 uint16_t format; /* 0 = graphics */
1920 uint32_t start_display_time; /* relative to packet pts, in ms */
1921 uint32_t end_display_time; /* relative to packet pts, in ms */
1922 uint32_t num_rects;
1923 AVSubtitleRect *rects;
1924 } AVSubtitle;
1925
1926 extern AVCodec ac3_encoder;
1927 extern AVCodec mp2_encoder;
1928 extern AVCodec mp3lame_encoder;
1929 extern AVCodec oggvorbis_encoder;
1930 extern AVCodec oggtheora_encoder;
1931 extern AVCodec faac_encoder;
1932 extern AVCodec xvid_encoder;
1933 extern AVCodec mpeg1video_encoder;
1934 extern AVCodec mpeg2video_encoder;
1935 extern AVCodec h261_encoder;
1936 extern AVCodec h263_encoder;
1937 extern AVCodec h263p_encoder;
1938 extern AVCodec flv_encoder;
1939 extern AVCodec rv10_encoder;
1940 extern AVCodec rv20_encoder;
1941 extern AVCodec dvvideo_encoder;
1942 extern AVCodec mjpeg_encoder;
1943 extern AVCodec ljpeg_encoder;
1944 extern AVCodec png_encoder;
1945 extern AVCodec ppm_encoder;
1946 extern AVCodec pgm_encoder;
1947 extern AVCodec pgmyuv_encoder;
1948 extern AVCodec pbm_encoder;
1949 extern AVCodec pam_encoder;
1950 extern AVCodec mpeg4_encoder;
1951 extern AVCodec msmpeg4v1_encoder;
1952 extern AVCodec msmpeg4v2_encoder;
1953 extern AVCodec msmpeg4v3_encoder;
1954 extern AVCodec wmv1_encoder;
1955 extern AVCodec wmv2_encoder;
1956 extern AVCodec huffyuv_encoder;
1957 extern AVCodec ffvhuff_encoder;
1958 extern AVCodec h264_encoder;
1959 extern AVCodec asv1_encoder;
1960 extern AVCodec asv2_encoder;
1961 extern AVCodec vcr1_encoder;
1962 extern AVCodec ffv1_encoder;
1963 extern AVCodec snow_encoder;
1964 extern AVCodec mdec_encoder;
1965 extern AVCodec zlib_encoder;
1966 extern AVCodec sonic_encoder;
1967 extern AVCodec sonic_ls_encoder;
1968 extern AVCodec svq1_encoder;
1969 extern AVCodec x264_encoder;
1970
1971 extern AVCodec h263_decoder;
1972 extern AVCodec h261_decoder;
1973 extern AVCodec mpeg4_decoder;
1974 extern AVCodec msmpeg4v1_decoder;
1975 extern AVCodec msmpeg4v2_decoder;
1976 extern AVCodec msmpeg4v3_decoder;
1977 extern AVCodec wmv1_decoder;
1978 extern AVCodec wmv2_decoder;
1979 extern AVCodec vc9_decoder;
1980 extern AVCodec wmv3_decoder;
1981 extern AVCodec mpeg1video_decoder;
1982 extern AVCodec mpeg2video_decoder;
1983 extern AVCodec mpegvideo_decoder;
1984 extern AVCodec mpeg_xvmc_decoder;
1985 extern AVCodec h263i_decoder;
1986 extern AVCodec flv_decoder;
1987 extern AVCodec rv10_decoder;
1988 extern AVCodec rv20_decoder;
1989 extern AVCodec rv30_decoder;
1990 extern AVCodec rv40_decoder;
1991 extern AVCodec svq1_decoder;
1992 extern AVCodec svq3_decoder;
1993 extern AVCodec dvvideo_decoder;
1994 extern AVCodec wmav1_decoder;
1995 extern AVCodec wmav2_decoder;
1996 extern AVCodec mjpeg_decoder;
1997 extern AVCodec mjpegb_decoder;
1998 extern AVCodec sp5x_decoder;
1999 extern AVCodec png_decoder;
2000 extern AVCodec mp2_decoder;
2001 extern AVCodec mp3_decoder;
2002 extern AVCodec mp3adu_decoder;
2003 extern AVCodec mp3on4_decoder;
2004 extern AVCodec qdm2_decoder;
2005 extern AVCodec mace3_decoder;
2006 extern AVCodec mace6_decoder;
2007 extern AVCodec huffyuv_decoder;
2008 extern AVCodec ffvhuff_decoder;
2009 extern AVCodec oggvorbis_decoder;
2010 extern AVCodec oggtheora_decoder;
2011 extern AVCodec cyuv_decoder;
2012 extern AVCodec h264_decoder;
2013 extern AVCodec indeo3_decoder;
2014 extern AVCodec vp3_decoder;
2015 extern AVCodec theora_decoder;
2016 extern AVCodec amr_nb_decoder;
2017 extern AVCodec amr_nb_encoder;
2018 extern AVCodec amr_wb_encoder;
2019 extern AVCodec amr_wb_decoder;
2020 extern AVCodec aac_decoder;
2021 extern AVCodec mpeg4aac_decoder;
2022 extern AVCodec asv1_decoder;
2023 extern AVCodec asv2_decoder;
2024 extern AVCodec vcr1_decoder;
2025 extern AVCodec cljr_decoder;
2026 extern AVCodec ffv1_decoder;
2027 extern AVCodec snow_decoder;
2028 extern AVCodec fourxm_decoder;
2029 extern AVCodec mdec_decoder;
2030 extern AVCodec roq_decoder;
2031 extern AVCodec interplay_video_decoder;
2032 extern AVCodec xan_wc3_decoder;
2033 extern AVCodec rpza_decoder;
2034 extern AVCodec cinepak_decoder;
2035 extern AVCodec msrle_decoder;
2036 extern AVCodec msvideo1_decoder;
2037 extern AVCodec vqa_decoder;
2038 extern AVCodec idcin_decoder;
2039 extern AVCodec eightbps_decoder;
2040 extern AVCodec smc_decoder;
2041 extern AVCodec flic_decoder;
2042 extern AVCodec vmdvideo_decoder;
2043 extern AVCodec vmdaudio_decoder;
2044 extern AVCodec truemotion1_decoder;
2045 extern AVCodec truemotion2_decoder;
2046 extern AVCodec mszh_decoder;
2047 extern AVCodec zlib_decoder;
2048 extern AVCodec ra_144_decoder;
2049 extern AVCodec ra_288_decoder;
2050 extern AVCodec roq_dpcm_decoder;
2051 extern AVCodec interplay_dpcm_decoder;
2052 extern AVCodec xan_dpcm_decoder;
2053 extern AVCodec sol_dpcm_decoder;
2054 extern AVCodec sonic_decoder;
2055 extern AVCodec qtrle_decoder;
2056 extern AVCodec flac_decoder;
2057 extern AVCodec tscc_decoder;
2058 extern AVCodec ulti_decoder;
2059 extern AVCodec qdraw_decoder;
2060 extern AVCodec xl_decoder;
2061 extern AVCodec qpeg_decoder;
2062 extern AVCodec shorten_decoder;
2063 extern AVCodec loco_decoder;
2064 extern AVCodec wnv1_decoder;
2065 extern AVCodec aasc_decoder;
2066 extern AVCodec alac_decoder;
2067 extern AVCodec ws_snd1_decoder;
2068 extern AVCodec indeo2_decoder;
2069 extern AVCodec vorbis_decoder;
2070 extern AVCodec fraps_decoder;
2071 extern AVCodec libgsm_encoder;
2072 extern AVCodec libgsm_decoder;
2073
2074 /* pcm codecs */
2075 #define PCM_CODEC(id, name) \
2076 extern AVCodec name ## _decoder; \
2077 extern AVCodec name ## _encoder
2078
2079 PCM_CODEC(CODEC_ID_PCM_S32LE, pcm_s32le);
2080 PCM_CODEC(CODEC_ID_PCM_S32BE, pcm_s32be);
2081 PCM_CODEC(CODEC_ID_PCM_U32LE, pcm_u32le);
2082 PCM_CODEC(CODEC_ID_PCM_U32BE, pcm_u32be);
2083 PCM_CODEC(CODEC_ID_PCM_S24LE, pcm_s24le);
2084 PCM_CODEC(CODEC_ID_PCM_S24BE, pcm_s24be);
2085 PCM_CODEC(CODEC_ID_PCM_U24LE, pcm_u24le);
2086 PCM_CODEC(CODEC_ID_PCM_U24BE, pcm_u24be);
2087 PCM_CODEC(CODEC_ID_PCM_S24DAUD, pcm_s24daud);
2088 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
2089 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
2090 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
2091 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
2092 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
2093 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
2094 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
2095 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
2096
2097 /* adpcm codecs */
2098
2099 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
2100 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
2101 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
2102 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
2103 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
2104 PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
2105 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
2106 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
2107 PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
2108 PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
2109 PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
2110 PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
2111 PCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
2112 PCM_CODEC(CODEC_ID_ADPCM_SWF, adpcm_swf);
2113 PCM_CODEC(CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha);
2114
2115 #undef PCM_CODEC
2116
2117 /* dummy raw video codec */
2118 extern AVCodec rawvideo_encoder;
2119 extern AVCodec rawvideo_decoder;
2120
2121 /* the following codecs use external GPL libs */
2122 extern AVCodec ac3_decoder;
2123 extern AVCodec dts_decoder;
2124
2125 /* subtitles */
2126 extern AVCodec dvdsub_decoder;
2127 extern AVCodec dvbsub_encoder;
2128 extern AVCodec dvbsub_decoder;
2129
2130 /* resample.c */
2131
2132 struct ReSampleContext;
2133 struct AVResampleContext;
2134
2135 typedef struct ReSampleContext ReSampleContext;
2136
2137 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2138 int output_rate, int input_rate);
2139 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2140 void audio_resample_close(ReSampleContext *s);
2141
2142 struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2143 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2144 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2145 void av_resample_close(struct AVResampleContext *c);
2146
2147 /* YUV420 format is assumed ! */
2148
2149 struct ImgReSampleContext;
2150
2151 typedef struct ImgReSampleContext ImgReSampleContext;
2152
2153 ImgReSampleContext *img_resample_init(int output_width, int output_height,
2154 int input_width, int input_height);
2155
2156 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
2157 int iwidth, int iheight,
2158 int topBand, int bottomBand,
2159 int leftBand, int rightBand,
2160 int padtop, int padbottom,
2161 int padleft, int padright);
2162
2163
2164 void img_resample(ImgReSampleContext *s,
2165 AVPicture *output, const AVPicture *input);
2166
2167 void img_resample_close(ImgReSampleContext *s);
2168
2169 /**
2170 * Allocate memory for a picture. Call avpicture_free to free it.
2171 *
2172 * @param picture the picture to be filled in.
2173 * @param pix_fmt the format of the picture.
2174 * @param width the width of the picture.
2175 * @param height the height of the picture.
2176 * @return 0 if successful, -1 if not.
2177 */
2178 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2179
2180 /* Free a picture previously allocated by avpicture_alloc. */
2181 void avpicture_free(AVPicture *picture);
2182
2183 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2184 int pix_fmt, int width, int height);
2185 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2186 unsigned char *dest, int dest_size);
2187 int avpicture_get_size(int pix_fmt, int width, int height);
2188 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2189 const char *avcodec_get_pix_fmt_name(int pix_fmt);
2190 void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2191 enum PixelFormat avcodec_get_pix_fmt(const char* name);
2192 unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2193
2194 #define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
2195 #define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
2196 #define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
2197 #define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
2198 #define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
2199 #define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
2200
2201 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2202 int has_alpha);
2203 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2204 int has_alpha, int *loss_ptr);
2205
2206 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
2207 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
2208 int img_get_alpha_info(const AVPicture *src,
2209 int pix_fmt, int width, int height);
2210
2211 /* convert among pixel formats */
2212 int img_convert(AVPicture *dst, int dst_pix_fmt,
2213 const AVPicture *src, int pix_fmt,
2214 int width, int height);
2215
2216 /* deinterlace a picture */
2217 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2218 int pix_fmt, int width, int height);
2219
2220 /* external high level API */
2221
2222 extern AVCodec *first_avcodec;
2223
2224 /* returns LIBAVCODEC_VERSION_INT constant */
2225 unsigned avcodec_version(void);
2226 /* returns LIBAVCODEC_BUILD constant */
2227 unsigned avcodec_build(void);
2228 void avcodec_init(void);
2229
2230 void register_avcodec(AVCodec *format);
2231 AVCodec *avcodec_find_encoder(enum CodecID id);
2232 AVCodec *avcodec_find_encoder_by_name(const char *name);
2233 AVCodec *avcodec_find_decoder(enum CodecID id);
2234 AVCodec *avcodec_find_decoder_by_name(const char *name);
2235 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2236
2237 void avcodec_get_context_defaults(AVCodecContext *s);
2238 AVCodecContext *avcodec_alloc_context(void);
2239 void avcodec_get_frame_defaults(AVFrame *pic);
2240 AVFrame *avcodec_alloc_frame(void);
2241
2242 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2243 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2244 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2245 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2246 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2247 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2248
2249 int avcodec_thread_init(AVCodecContext *s, int thread_count);
2250 void avcodec_thread_free(AVCodecContext *s);
2251 int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2252 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2253 //FIXME func typedef
2254
2255 /**
2256 * opens / inits the AVCodecContext.
2257 * not thread save!
2258 */
2259 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2260
2261 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2262 int *frame_size_ptr,
2263 uint8_t *buf, int buf_size);
2264 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2265 int *got_picture_ptr,
2266 uint8_t *buf, int buf_size);
2267 int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
2268 int *got_sub_ptr,
2269 const uint8_t *buf, int buf_size);
2270 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2271 int *data_size_ptr,
2272 uint8_t *buf, int buf_size);
2273 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2274 const short *samples);
2275 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2276 const AVFrame *pict);
2277 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2278 const AVSubtitle *sub);
2279
2280 int avcodec_close(AVCodecContext *avctx);
2281
2282 void avcodec_register_all(void);
2283
2284 void avcodec_flush_buffers(AVCodecContext *avctx);
2285
2286 void avcodec_default_free_buffers(AVCodecContext *s);
2287
2288 /* misc usefull functions */
2289
2290 /**
2291 * returns a single letter to describe the picture type
2292 */
2293 char av_get_pict_type_char(int pict_type);
2294
2295
2296 /* frame parsing */
2297 typedef struct AVCodecParserContext {
2298 void *priv_data;
2299 struct AVCodecParser *parser;
2300 int64_t frame_offset; /* offset of the current frame */
2301 int64_t cur_offset; /* current offset
2302 (incremented by each av_parser_parse()) */
2303 int64_t last_frame_offset; /* offset of the last frame */
2304 /* video info */
2305 int pict_type; /* XXX: put it back in AVCodecContext */
2306 int repeat_pict; /* XXX: put it back in AVCodecContext */
2307 int64_t pts; /* pts of the current frame */
2308 int64_t dts; /* dts of the current frame */
2309
2310 /* private data */
2311 int64_t last_pts;
2312 int64_t last_dts;
2313 int fetch_timestamp;
2314
2315 #define AV_PARSER_PTS_NB 4
2316 int cur_frame_start_index;
2317 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2318 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2319 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2320
2321 int flags;
2322 #define PARSER_FLAG_COMPLETE_FRAMES 0x0001
2323 } AVCodecParserContext;
2324
2325 typedef struct AVCodecParser {
2326 int codec_ids[5]; /* several codec IDs are permitted */
2327 int priv_data_size;
2328 int (*parser_init)(AVCodecParserContext *s);
2329 int (*parser_parse)(AVCodecParserContext *s,
2330 AVCodecContext *avctx,
2331 uint8_t **poutbuf, int *poutbuf_size,
2332 const uint8_t *buf, int buf_size);
2333 void (*parser_close)(AVCodecParserContext *s);
2334 int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
2335 struct AVCodecParser *next;
2336 } AVCodecParser;
2337
2338 extern AVCodecParser *av_first_parser;
2339
2340 void av_register_codec_parser(AVCodecParser *parser);
2341 AVCodecParserContext *av_parser_init(int codec_id);
2342 int av_parser_parse(AVCodecParserContext *s,
2343 AVCodecContext *avctx,
2344 uint8_t **poutbuf, int *poutbuf_size,
2345 const uint8_t *buf, int buf_size,
2346 int64_t pts, int64_t dts);
2347 int av_parser_change(AVCodecParserContext *s,
2348 AVCodecContext *avctx,
2349 uint8_t **poutbuf, int *poutbuf_size,
2350 const uint8_t *buf, int buf_size, int keyframe);
2351 void av_parser_close(AVCodecParserContext *s);
2352
2353 extern AVCodecParser mpegvideo_parser;
2354 extern AVCodecParser mpeg4video_parser;
2355 extern AVCodecParser h261_parser;
2356 extern AVCodecParser h263_parser;
2357 extern AVCodecParser h264_parser;
2358 extern AVCodecParser mjpeg_parser;
2359 extern AVCodecParser pnm_parser;
2360 extern AVCodecParser mpegaudio_parser;
2361 extern AVCodecParser ac3_parser;
2362 extern AVCodecParser dvdsub_parser;
2363 extern AVCodecParser dvbsub_parser;
2364
2365 /* memory */
2366 void *av_malloc(unsigned int size);
2367 void *av_mallocz(unsigned int size);
2368 void *av_realloc(void *ptr, unsigned int size);
2369 void av_free(void *ptr);
2370 char *av_strdup(const char *s);
2371 void av_freep(void *ptr);
2372 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2373 /* for static data only */
2374 /* call av_free_static to release all staticaly allocated tables */
2375 void av_free_static(void);
2376 void *av_mallocz_static(unsigned int size);
2377 void *av_realloc_static(void *ptr, unsigned int size);
2378
2379 /* add by bero : in adx.c */
2380 int is_adx(const unsigned char *buf,size_t bufsize);
2381
2382 void img_copy(AVPicture *dst, const AVPicture *src,
2383 int pix_fmt, int width, int height);
2384
2385 /* av_log API */
2386
2387 #include <stdarg.h>
2388
2389 #define AV_LOG_QUIET -1
2390 #define AV_LOG_ERROR 0
2391 #define AV_LOG_INFO 1
2392 #define AV_LOG_DEBUG 2
2393
2394 #ifdef __GNUC__
2395 extern void av_log(void*, int level, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 3, 4)));
2396 #else
2397 extern void av_log(void*, int level, const char *fmt, ...);
2398 #endif
2399
2400 extern void av_vlog(void*, int level, const char *fmt, va_list);
2401 extern int av_log_get_level(void);
2402 extern void av_log_set_level(int);
2403 extern void av_log_set_callback(void (*)(void*, int, const char*, va_list));
2404
2405 /* endian macros */
2406 #if !defined(BE_16) || !defined(BE_32) || !defined(LE_16) || !defined(LE_32)
2407 #define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
2408 #define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
2409 (((uint8_t*)(x))[1] << 16) | \
2410 (((uint8_t*)(x))[2] << 8) | \
2411 ((uint8_t*)(x))[3])
2412 #define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
2413 #define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \
2414 (((uint8_t*)(x))[2] << 16) | \
2415 (((uint8_t*)(x))[1] << 8) | \
2416 ((uint8_t*)(x))[0])
2417 #endif
2418
2419 extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
2420
2421 #ifdef __cplusplus
2422 }
2423 #endif
2424
2425 #endif /* AVCODEC_H */