b4ab5b3d83e82f2d270f43aeee5671082723c958
[libav.git] / libavcodec / avcodec.h
1 #ifndef AVCODEC_H
2 #define AVCODEC_H
3
4 /**
5 * @file avcodec.h
6 * external api header.
7 */
8
9
10 #ifdef __cplusplus
11 extern "C" {
12 #endif
13
14 #include "common.h"
15 #include "rational.h"
16 #include <sys/types.h> /* size_t */
17
18 #define FFMPEG_VERSION_INT 0x000409
19 #define FFMPEG_VERSION "0.4.9-pre1"
20 #define LIBAVCODEC_BUILD 4744
21
22 #define LIBAVCODEC_VERSION_INT FFMPEG_VERSION_INT
23 #define LIBAVCODEC_VERSION FFMPEG_VERSION
24
25 #define AV_STRINGIFY(s) AV_TOSTRING(s)
26 #define AV_TOSTRING(s) #s
27 #define LIBAVCODEC_IDENT "FFmpeg" LIBAVCODEC_VERSION "b" AV_STRINGIFY(LIBAVCODEC_BUILD)
28
29 #define AV_NOPTS_VALUE int64_t_C(0x8000000000000000)
30 #define AV_TIME_BASE 1000000
31
32 enum CodecID {
33 CODEC_ID_NONE,
34 CODEC_ID_MPEG1VIDEO,
35 CODEC_ID_MPEG2VIDEO, /* prefered ID for MPEG Video 1 or 2 decoding */
36 CODEC_ID_MPEG2VIDEO_XVMC,
37 CODEC_ID_H261,
38 CODEC_ID_H263,
39 CODEC_ID_RV10,
40 CODEC_ID_RV20,
41 CODEC_ID_MJPEG,
42 CODEC_ID_MJPEGB,
43 CODEC_ID_LJPEG,
44 CODEC_ID_SP5X,
45 CODEC_ID_MPEG4,
46 CODEC_ID_RAWVIDEO,
47 CODEC_ID_MSMPEG4V1,
48 CODEC_ID_MSMPEG4V2,
49 CODEC_ID_MSMPEG4V3,
50 CODEC_ID_WMV1,
51 CODEC_ID_WMV2,
52 CODEC_ID_H263P,
53 CODEC_ID_H263I,
54 CODEC_ID_FLV1,
55 CODEC_ID_SVQ1,
56 CODEC_ID_SVQ3,
57 CODEC_ID_DVVIDEO,
58 CODEC_ID_HUFFYUV,
59 CODEC_ID_CYUV,
60 CODEC_ID_H264,
61 CODEC_ID_INDEO3,
62 CODEC_ID_VP3,
63 CODEC_ID_THEORA,
64 CODEC_ID_ASV1,
65 CODEC_ID_ASV2,
66 CODEC_ID_FFV1,
67 CODEC_ID_4XM,
68 CODEC_ID_VCR1,
69 CODEC_ID_CLJR,
70 CODEC_ID_MDEC,
71 CODEC_ID_ROQ,
72 CODEC_ID_INTERPLAY_VIDEO,
73 CODEC_ID_XAN_WC3,
74 CODEC_ID_XAN_WC4,
75 CODEC_ID_RPZA,
76 CODEC_ID_CINEPAK,
77 CODEC_ID_WS_VQA,
78 CODEC_ID_MSRLE,
79 CODEC_ID_MSVIDEO1,
80 CODEC_ID_IDCIN,
81 CODEC_ID_8BPS,
82 CODEC_ID_SMC,
83 CODEC_ID_FLIC,
84 CODEC_ID_TRUEMOTION1,
85 CODEC_ID_VMDVIDEO,
86 CODEC_ID_MSZH,
87 CODEC_ID_ZLIB,
88 CODEC_ID_QTRLE,
89 CODEC_ID_SNOW,
90 CODEC_ID_TSCC,
91 CODEC_ID_ULTI,
92 CODEC_ID_QDRAW,
93 CODEC_ID_VIXL,
94 CODEC_ID_QPEG,
95 CODEC_ID_XVID,
96 CODEC_ID_PNG,
97 CODEC_ID_PPM,
98 CODEC_ID_PBM,
99 CODEC_ID_PGM,
100 CODEC_ID_PGMYUV,
101 CODEC_ID_PAM,
102 CODEC_ID_FFVHUFF,
103 CODEC_ID_RV30,
104 CODEC_ID_RV40,
105 CODEC_ID_VC9,
106 CODEC_ID_WMV3,
107 CODEC_ID_LOCO,
108
109 /* various pcm "codecs" */
110 CODEC_ID_PCM_S16LE= 0x10000,
111 CODEC_ID_PCM_S16BE,
112 CODEC_ID_PCM_U16LE,
113 CODEC_ID_PCM_U16BE,
114 CODEC_ID_PCM_S8,
115 CODEC_ID_PCM_U8,
116 CODEC_ID_PCM_MULAW,
117 CODEC_ID_PCM_ALAW,
118
119 /* various adpcm codecs */
120 CODEC_ID_ADPCM_IMA_QT= 0x11000,
121 CODEC_ID_ADPCM_IMA_WAV,
122 CODEC_ID_ADPCM_IMA_DK3,
123 CODEC_ID_ADPCM_IMA_DK4,
124 CODEC_ID_ADPCM_IMA_WS,
125 CODEC_ID_ADPCM_IMA_SMJPEG,
126 CODEC_ID_ADPCM_MS,
127 CODEC_ID_ADPCM_4XM,
128 CODEC_ID_ADPCM_XA,
129 CODEC_ID_ADPCM_ADX,
130 CODEC_ID_ADPCM_EA,
131 CODEC_ID_ADPCM_G726,
132 CODEC_ID_ADPCM_CT,
133 CODEC_ID_ADPCM_SWF,
134
135 /* AMR */
136 CODEC_ID_AMR_NB= 0x12000,
137 CODEC_ID_AMR_WB,
138
139 /* RealAudio codecs*/
140 CODEC_ID_RA_144= 0x13000,
141 CODEC_ID_RA_288,
142
143 /* various DPCM codecs */
144 CODEC_ID_ROQ_DPCM= 0x14000,
145 CODEC_ID_INTERPLAY_DPCM,
146 CODEC_ID_XAN_DPCM,
147 CODEC_ID_SOL_DPCM,
148
149 CODEC_ID_MP2= 0x15000,
150 CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
151 CODEC_ID_AAC,
152 CODEC_ID_MPEG4AAC,
153 CODEC_ID_AC3,
154 CODEC_ID_DTS,
155 CODEC_ID_VORBIS,
156 CODEC_ID_DVAUDIO,
157 CODEC_ID_WMAV1,
158 CODEC_ID_WMAV2,
159 CODEC_ID_MACE3,
160 CODEC_ID_MACE6,
161 CODEC_ID_VMDAUDIO,
162 CODEC_ID_SONIC,
163 CODEC_ID_SONIC_LS,
164 CODEC_ID_FLAC,
165 CODEC_ID_MP3ADU,
166 CODEC_ID_MP3ON4,
167 CODEC_ID_SHORTEN,
168
169 CODEC_ID_OGGTHEORA= 0x16000,
170
171 CODEC_ID_MPEG2TS= 0x20000, /* _FAKE_ codec to indicate a raw MPEG2 transport
172 stream (only used by libavformat) */
173 };
174
175 /* CODEC_ID_MP3LAME is absolete */
176 #define CODEC_ID_MP3LAME CODEC_ID_MP3
177
178 enum CodecType {
179 CODEC_TYPE_UNKNOWN = -1,
180 CODEC_TYPE_VIDEO,
181 CODEC_TYPE_AUDIO,
182 CODEC_TYPE_DATA,
183 };
184
185 /**
186 * Pixel format. Notes:
187 *
188 * PIX_FMT_RGBA32 is handled in an endian-specific manner. A RGBA
189 * color is put together as:
190 * (A << 24) | (R << 16) | (G << 8) | B
191 * This is stored as BGRA on little endian CPU architectures and ARGB on
192 * big endian CPUs.
193 *
194 * When the pixel format is palettized RGB (PIX_FMT_PAL8), the palettized
195 * image data is stored in AVFrame.data[0]. The palette is transported in
196 * AVFrame.data[1] and, is 1024 bytes long (256 4-byte entries) and is
197 * formatted the same as in PIX_FMT_RGBA32 described above (i.e., it is
198 * also endian-specific). Note also that the individual RGB palette
199 * components stored in AVFrame.data[1] should be in the range 0..255.
200 * This is important as many custom PAL8 video codecs that were designed
201 * to run on the IBM VGA graphics adapter use 6-bit palette components.
202 */
203 enum PixelFormat {
204 PIX_FMT_YUV420P, ///< Planar YUV 4:2:0 (1 Cr & Cb sample per 2x2 Y samples)
205 PIX_FMT_YUV422, ///< Packed pixel, Y0 Cb Y1 Cr
206 PIX_FMT_RGB24, ///< Packed pixel, 3 bytes per pixel, RGBRGB...
207 PIX_FMT_BGR24, ///< Packed pixel, 3 bytes per pixel, BGRBGR...
208 PIX_FMT_YUV422P, ///< Planar YUV 4:2:2 (1 Cr & Cb sample per 2x1 Y samples)
209 PIX_FMT_YUV444P, ///< Planar YUV 4:4:4 (1 Cr & Cb sample per 1x1 Y samples)
210 PIX_FMT_RGBA32, ///< Packed pixel, 4 bytes per pixel, BGRABGRA..., stored in cpu endianness
211 PIX_FMT_YUV410P, ///< Planar YUV 4:1:0 (1 Cr & Cb sample per 4x4 Y samples)
212 PIX_FMT_YUV411P, ///< Planar YUV 4:1:1 (1 Cr & Cb sample per 4x1 Y samples)
213 PIX_FMT_RGB565, ///< always stored in cpu endianness
214 PIX_FMT_RGB555, ///< always stored in cpu endianness, most significant bit to 1
215 PIX_FMT_GRAY8,
216 PIX_FMT_MONOWHITE, ///< 0 is white
217 PIX_FMT_MONOBLACK, ///< 0 is black
218 PIX_FMT_PAL8, ///< 8 bit with RGBA palette
219 PIX_FMT_YUVJ420P, ///< Planar YUV 4:2:0 full scale (jpeg)
220 PIX_FMT_YUVJ422P, ///< Planar YUV 4:2:2 full scale (jpeg)
221 PIX_FMT_YUVJ444P, ///< Planar YUV 4:4:4 full scale (jpeg)
222 PIX_FMT_XVMC_MPEG2_MC,///< XVideo Motion Acceleration via common packet passing(xvmc_render.h)
223 PIX_FMT_XVMC_MPEG2_IDCT,
224 PIX_FMT_UYVY422, ///< Packed pixel, Cb Y0 Cr Y1
225 PIX_FMT_UYVY411, ///< Packed pixel, Cb Y0 Y1 Cr Y2 Y3
226 PIX_FMT_NB,
227 };
228
229 /* currently unused, may be used if 24/32 bits samples ever supported */
230 enum SampleFormat {
231 SAMPLE_FMT_S16 = 0, ///< signed 16 bits
232 SAMPLE_FMT_S32, ///< signed 32 bits
233 SAMPLE_FMT_FLT, ///< float
234 SAMPLE_FMT_DBL, ///< double
235 };
236
237 /* in bytes */
238 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 131072
239
240 /**
241 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
242 * this is mainly needed because some optimized bitstream readers read
243 * 32 or 64 bit at once and could read over the end<br>
244 * Note, if the first 23 bits of the additional bytes are not 0 then damaged
245 * MPEG bitstreams could cause overread and segfault
246 */
247 #define FF_INPUT_BUFFER_PADDING_SIZE 8
248
249 /**
250 * minimum encoding buffer size.
251 * used to avoid some checks during header writing
252 */
253 #define FF_MIN_BUFFER_SIZE 16384
254
255 /* motion estimation type, EPZS by default */
256 enum Motion_Est_ID {
257 ME_ZERO = 1,
258 ME_FULL,
259 ME_LOG,
260 ME_PHODS,
261 ME_EPZS,
262 ME_X1
263 };
264
265 enum AVRounding {
266 AV_ROUND_ZERO = 0, ///< round toward zero
267 AV_ROUND_INF = 1, ///< round away from zero
268 AV_ROUND_DOWN = 2, ///< round toward -infinity
269 AV_ROUND_UP = 3, ///< round toward +infinity
270 AV_ROUND_NEAR_INF = 5, ///< round to nearest and halfway cases away from zero
271 };
272
273 typedef struct RcOverride{
274 int start_frame;
275 int end_frame;
276 int qscale; // if this is 0 then quality_factor will be used instead
277 float quality_factor;
278 } RcOverride;
279
280 /* only for ME compatiblity with old apps */
281 extern int motion_estimation_method;
282
283 #define FF_MAX_B_FRAMES 8
284
285 /* encoding support
286 these flags can be passed in AVCodecContext.flags before initing
287 Note: note not everything is supported yet
288 */
289
290 #define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
291 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / Advanced prediction for H263
292 #define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
293 #define CODEC_FLAG_GMC 0x0020 ///< use GMC
294 #define CODEC_FLAG_MV0 0x0040 ///< always try a MB with MV=<0,0>
295 #define CODEC_FLAG_PART 0x0080 ///< use data partitioning
296 /* parent program gurantees that the input for b-frame containing streams is not written to
297 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
298 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
299 #define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
300 #define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
301 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
302 #define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
303 #define CODEC_FLAG_EMU_EDGE 0x4000///< dont draw edges
304 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
305 #define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
306 of only at frame boundaries */
307 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
308 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
309 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay
310 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
311 #define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
312 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
313 #define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
314 /* Fx : Flag for h263+ extra options */
315 #define CODEC_FLAG_H263P_AIC 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
316 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
317 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
318 #define CODEC_FLAG_CBP_RD 0x04000000 ///< use rate distortion optimization for cbp
319 #define CODEC_FLAG_QP_RD 0x08000000 ///< use rate distortion optimization for qp selectioon
320 #define CODEC_FLAG_H263P_AIV 0x00000008 ///< H263 Alternative inter vlc
321 #define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
322 #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
323 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
324 #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
325 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
326 #define CODEC_FLAG_CLOSED_GOP 0x80000000
327 #define CODEC_FLAG2_FAST 0x00000001 ///< allow non spec compliant speedup tricks
328 #define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< strictly enforce GOP size
329 #define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< skip bitstream encoding
330
331 /* Unsupported options :
332 * Syntax Arithmetic coding (SAC)
333 * Reference Picture Selection
334 * Independant Segment Decoding */
335 /* /Fx */
336 /* codec capabilities */
337
338 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
339 /**
340 * Codec uses get_buffer() for allocating buffers.
341 * direct rendering method 1
342 */
343 #define CODEC_CAP_DR1 0x0002
344 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
345 used */
346 #define CODEC_CAP_PARSE_ONLY 0x0004
347 #define CODEC_CAP_TRUNCATED 0x0008
348 /* codec can export data for HW decoding (XvMC) */
349 #define CODEC_CAP_HWACCEL 0x0010
350 /**
351 * codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data.
352 * if this is not set, the codec is guranteed to never be feeded with NULL data
353 */
354 #define CODEC_CAP_DELAY 0x0020
355
356 //the following defines might change, so dont expect compatibility if u use them
357 #define MB_TYPE_INTRA4x4 0x0001
358 #define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
359 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME h264 specific
360 #define MB_TYPE_16x16 0x0008
361 #define MB_TYPE_16x8 0x0010
362 #define MB_TYPE_8x16 0x0020
363 #define MB_TYPE_8x8 0x0040
364 #define MB_TYPE_INTERLACED 0x0080
365 #define MB_TYPE_DIRECT2 0x0100 //FIXME
366 #define MB_TYPE_ACPRED 0x0200
367 #define MB_TYPE_GMC 0x0400
368 #define MB_TYPE_SKIP 0x0800
369 #define MB_TYPE_P0L0 0x1000
370 #define MB_TYPE_P1L0 0x2000
371 #define MB_TYPE_P0L1 0x4000
372 #define MB_TYPE_P1L1 0x8000
373 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
374 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
375 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
376 #define MB_TYPE_QUANT 0x00010000
377 #define MB_TYPE_CBP 0x00020000
378 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
379
380 /**
381 * Pan Scan area.
382 * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
383 */
384 typedef struct AVPanScan{
385 /**
386 * id.
387 * - encoding: set by user.
388 * - decoding: set by lavc
389 */
390 int id;
391
392 /**
393 * width and height in 1/16 pel
394 * - encoding: set by user.
395 * - decoding: set by lavc
396 */
397 int width;
398 int height;
399
400 /**
401 * position of the top left corner in 1/16 pel for up to 3 fields/frames.
402 * - encoding: set by user.
403 * - decoding: set by lavc
404 */
405 int16_t position[3][2];
406 }AVPanScan;
407
408 #define FF_COMMON_FRAME \
409 /**\
410 * pointer to the picture planes.\
411 * this might be different from the first allocated byte\
412 * - encoding: \
413 * - decoding: \
414 */\
415 uint8_t *data[4];\
416 int linesize[4];\
417 /**\
418 * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
419 * this isnt used by lavc unless the default get/release_buffer() is used\
420 * - encoding: \
421 * - decoding: \
422 */\
423 uint8_t *base[4];\
424 /**\
425 * 1 -> keyframe, 0-> not\
426 * - encoding: set by lavc\
427 * - decoding: set by lavc\
428 */\
429 int key_frame;\
430 \
431 /**\
432 * picture type of the frame, see ?_TYPE below.\
433 * - encoding: set by lavc for coded_picture (and set by user for input)\
434 * - decoding: set by lavc\
435 */\
436 int pict_type;\
437 \
438 /**\
439 * presentation timestamp in AV_TIME_BASE (=micro seconds currently) (time when frame should be shown to user)\
440 * if AV_NOPTS_VALUE then the frame_rate will be used as reference\
441 * - encoding: MUST be set by user\
442 * - decoding: set by lavc\
443 */\
444 int64_t pts;\
445 \
446 /**\
447 * picture number in bitstream order.\
448 * - encoding: set by\
449 * - decoding: set by lavc\
450 */\
451 int coded_picture_number;\
452 /**\
453 * picture number in display order.\
454 * - encoding: set by\
455 * - decoding: set by lavc\
456 */\
457 int display_picture_number;\
458 \
459 /**\
460 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
461 * - encoding: set by lavc for coded_picture (and set by user for input)\
462 * - decoding: set by lavc\
463 */\
464 int quality; \
465 \
466 /**\
467 * buffer age (1->was last buffer and dint change, 2->..., ...).\
468 * set to INT_MAX if the buffer has not been used yet \
469 * - encoding: unused\
470 * - decoding: MUST be set by get_buffer()\
471 */\
472 int age;\
473 \
474 /**\
475 * is this picture used as reference\
476 * - encoding: unused\
477 * - decoding: set by lavc (before get_buffer() call))\
478 */\
479 int reference;\
480 \
481 /**\
482 * QP table\
483 * - encoding: unused\
484 * - decoding: set by lavc\
485 */\
486 int8_t *qscale_table;\
487 /**\
488 * QP store stride\
489 * - encoding: unused\
490 * - decoding: set by lavc\
491 */\
492 int qstride;\
493 \
494 /**\
495 * mbskip_table[mb]>=1 if MB didnt change\
496 * stride= mb_width = (width+15)>>4\
497 * - encoding: unused\
498 * - decoding: set by lavc\
499 */\
500 uint8_t *mbskip_table;\
501 \
502 /**\
503 * Motion vector table.\
504 * @code\
505 * example:\
506 * int mv_sample_log2= 4 - motion_subsample_log2;\
507 * int mb_width= (width+15)>>4;\
508 * int mv_stride= (mb_width << mv_sample_log2) + 1;\
509 * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
510 * @endcode\
511 * - encoding: set by user\
512 * - decoding: set by lavc\
513 */\
514 int16_t (*motion_val[2])[2];\
515 \
516 /**\
517 * Macroblock type table\
518 * mb_type_base + mb_width + 2\
519 * - encoding: set by user\
520 * - decoding: set by lavc\
521 */\
522 uint32_t *mb_type;\
523 \
524 /**\
525 * log2 of the size of the block which a single vector in motion_val represents: \
526 * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
527 * - encoding: unused\
528 * - decoding: set by lavc\
529 */\
530 uint8_t motion_subsample_log2;\
531 \
532 /**\
533 * for some private data of the user\
534 * - encoding: unused\
535 * - decoding: set by user\
536 */\
537 void *opaque;\
538 \
539 /**\
540 * error\
541 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
542 * - decoding: unused\
543 */\
544 uint64_t error[4];\
545 \
546 /**\
547 * type of the buffer (to keep track of who has to dealloc data[*])\
548 * - encoding: set by the one who allocs it\
549 * - decoding: set by the one who allocs it\
550 * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
551 */\
552 int type;\
553 \
554 /**\
555 * when decoding, this signal how much the picture must be delayed.\
556 * extra_delay = repeat_pict / (2*fps)\
557 * - encoding: unused\
558 * - decoding: set by lavc\
559 */\
560 int repeat_pict;\
561 \
562 /**\
563 * \
564 */\
565 int qscale_type;\
566 \
567 /**\
568 * The content of the picture is interlaced.\
569 * - encoding: set by user\
570 * - decoding: set by lavc (default 0)\
571 */\
572 int interlaced_frame;\
573 \
574 /**\
575 * if the content is interlaced, is top field displayed first.\
576 * - encoding: set by user\
577 * - decoding: set by lavc\
578 */\
579 int top_field_first;\
580 \
581 /**\
582 * Pan scan.\
583 * - encoding: set by user\
584 * - decoding: set by lavc\
585 */\
586 AVPanScan *pan_scan;\
587 \
588 /**\
589 * tell user application that palette has changed from previous frame.\
590 * - encoding: ??? (no palette-enabled encoder yet)\
591 * - decoding: set by lavc (default 0)\
592 */\
593 int palette_has_changed;\
594 \
595 /**\
596 * Codec suggestion on buffer type if != 0\
597 * - encoding: unused\
598 * - decoding: set by lavc (before get_buffer() call))\
599 */\
600 int buffer_hints;\
601 \
602 /**\
603 * DCT coeffitients\
604 * - encoding: unused\
605 * - decoding: set by lavc\
606 */\
607 short *dct_coeff;\
608 \
609 /**\
610 * Motion referece frame index\
611 * - encoding: set by user\
612 * - decoding: set by lavc\
613 */\
614 int8_t *ref_index[2];
615
616 #define FF_QSCALE_TYPE_MPEG1 0
617 #define FF_QSCALE_TYPE_MPEG2 1
618
619 #define FF_BUFFER_TYPE_INTERNAL 1
620 #define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
621 #define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewher else, dont dealloc image (data/base), all other tables are not shared
622 #define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, dont dealloc anything
623
624
625 #define FF_I_TYPE 1 // Intra
626 #define FF_P_TYPE 2 // Predicted
627 #define FF_B_TYPE 3 // Bi-dir predicted
628 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
629 #define FF_SI_TYPE 5
630 #define FF_SP_TYPE 6
631
632 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore)
633 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
634 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
635 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
636
637 /**
638 * Audio Video Frame.
639 */
640 typedef struct AVFrame {
641 FF_COMMON_FRAME
642 } AVFrame;
643
644 #define DEFAULT_FRAME_RATE_BASE 1001000
645
646 /**
647 * Used by av_log
648 */
649 typedef struct AVCLASS AVClass;
650 struct AVCLASS {
651 const char* class_name;
652 const char* (*item_name)(void*); /* actually passing a pointer to an AVCodecContext
653 or AVFormatContext, which begin with an AVClass.
654 Needed because av_log is in libavcodec and has no visibility
655 of AVIn/OutputFormat */
656 };
657
658 /**
659 * main external api structure.
660 */
661 typedef struct AVCodecContext {
662 /**
663 * Info on struct for av_log
664 * - set by avcodec_alloc_context
665 */
666 AVClass *av_class;
667 /**
668 * the average bitrate.
669 * - encoding: set by user. unused for constant quantizer encoding
670 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
671 */
672 int bit_rate;
673
674 /**
675 * number of bits the bitstream is allowed to diverge from the reference.
676 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
677 * - encoding: set by user. unused for constant quantizer encoding
678 * - decoding: unused
679 */
680 int bit_rate_tolerance;
681
682 /**
683 * CODEC_FLAG_*.
684 * - encoding: set by user.
685 * - decoding: set by user.
686 */
687 int flags;
688
689 /**
690 * some codecs needs additionnal format info. It is stored here
691 * - encoding: set by user.
692 * - decoding: set by lavc. (FIXME is this ok?)
693 */
694 int sub_id;
695
696 /**
697 * motion estimation algorithm used for video coding.
698 * - encoding: MUST be set by user.
699 * - decoding: unused
700 */
701 int me_method;
702
703 /**
704 * some codecs need / can use extra-data like huffman tables.
705 * mjpeg: huffman tables
706 * rv10: additional flags
707 * mpeg4: global headers (they can be in the bitstream or here)
708 * the allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
709 * then extradata_size to avoid prolems if its read with the bitstream reader
710 * - encoding: set/allocated/freed by lavc.
711 * - decoding: set/allocated/freed by user.
712 */
713 void *extradata;
714 int extradata_size;
715
716 /* video only */
717 /**
718 * frames per sec multiplied by frame_rate_base.
719 * for variable fps this is the precission, so if the timestamps
720 * can be specified in msec precssion then this is 1000*frame_rate_base
721 * - encoding: MUST be set by user
722 * - decoding: set by lavc. 0 or the frame_rate if available
723 */
724 int frame_rate;
725
726 /**
727 * picture width / height.
728 * - encoding: MUST be set by user.
729 * - decoding: set by lavc.
730 * Note, for compatibility its possible to set this instead of
731 * coded_width/height before decoding
732 */
733 int width, height;
734
735 #define FF_ASPECT_EXTENDED 15
736
737 /**
738 * the number of pictures in a group of pitures, or 0 for intra_only.
739 * - encoding: set by user.
740 * - decoding: unused
741 */
742 int gop_size;
743
744 /**
745 * pixel format, see PIX_FMT_xxx.
746 * - encoding: set by user.
747 * - decoding: set by lavc.
748 */
749 enum PixelFormat pix_fmt;
750
751 /**
752 * Frame rate emulation. If not zero lower layer (i.e. format handler)
753 * has to read frames at native frame rate.
754 * - encoding: set by user.
755 * - decoding: unused.
756 */
757 int rate_emu;
758
759 /**
760 * if non NULL, 'draw_horiz_band' is called by the libavcodec
761 * decoder to draw an horizontal band. It improve cache usage. Not
762 * all codecs can do that. You must check the codec capabilities
763 * before
764 * - encoding: unused
765 * - decoding: set by user.
766 * @param height the height of the slice
767 * @param y the y position of the slice
768 * @param type 1->top field, 2->bottom field, 3->frame
769 * @param offset offset into the AVFrame.data from which the slice should be read
770 */
771 void (*draw_horiz_band)(struct AVCodecContext *s,
772 const AVFrame *src, int offset[4],
773 int y, int type, int height);
774
775 /* audio only */
776 int sample_rate; ///< samples per sec
777 int channels;
778
779 /**
780 * audio sample format.
781 * - encoding: set by user.
782 * - decoding: set by lavc.
783 */
784 enum SampleFormat sample_fmt; ///< sample format, currenly unused
785
786 /* the following data should not be initialized */
787 int frame_size; ///< in samples, initialized when calling 'init'
788 int frame_number; ///< audio or video frame number
789 int real_pict_num; ///< returns the real picture number of previous encoded frame
790
791 /**
792 * number of frames the decoded output will be delayed relative to
793 * the encoded input.
794 * - encoding: set by lavc.
795 * - decoding: unused
796 */
797 int delay;
798
799 /* - encoding parameters */
800 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
801 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
802
803 /**
804 * minimum quantizer.
805 * - encoding: set by user.
806 * - decoding: unused
807 */
808 int qmin;
809
810 /**
811 * maximum quantizer.
812 * - encoding: set by user.
813 * - decoding: unused
814 */
815 int qmax;
816
817 /**
818 * maximum quantizer difference etween frames.
819 * - encoding: set by user.
820 * - decoding: unused
821 */
822 int max_qdiff;
823
824 /**
825 * maximum number of b frames between non b frames.
826 * note: the output will be delayed by max_b_frames+1 relative to the input
827 * - encoding: set by user.
828 * - decoding: unused
829 */
830 int max_b_frames;
831
832 /**
833 * qscale factor between ip and b frames.
834 * - encoding: set by user.
835 * - decoding: unused
836 */
837 float b_quant_factor;
838
839 /** obsolete FIXME remove */
840 int rc_strategy;
841 int b_frame_strategy;
842
843 /**
844 * hurry up amount.
845 * - encoding: unused
846 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
847 */
848 int hurry_up;
849
850 struct AVCodec *codec;
851
852 void *priv_data;
853
854 /* unused, FIXME remove*/
855 int rtp_mode;
856
857 int rtp_payload_size; /* The size of the RTP payload, the coder will */
858 /* do it's best to deliver a chunk with size */
859 /* below rtp_payload_size, the chunk will start */
860 /* with a start code on some codecs like H.263 */
861 /* This doesn't take account of any particular */
862 /* headers inside the transmited RTP payload */
863
864
865 /* The RTP callcack: This function is called */
866 /* every time the encoder as a packet to send */
867 /* Depends on the encoder if the data starts */
868 /* with a Start Code (it should) H.263 does. */
869 /* mb_nb contains the number of macroblocks */
870 /* encoded in the RTP payload */
871 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
872
873 /* statistics, used for 2-pass encoding */
874 int mv_bits;
875 int header_bits;
876 int i_tex_bits;
877 int p_tex_bits;
878 int i_count;
879 int p_count;
880 int skip_count;
881 int misc_bits;
882
883 /**
884 * number of bits used for the previously encoded frame.
885 * - encoding: set by lavc
886 * - decoding: unused
887 */
888 int frame_bits;
889
890 /**
891 * private data of the user, can be used to carry app specific stuff.
892 * - encoding: set by user
893 * - decoding: set by user
894 */
895 void *opaque;
896
897 char codec_name[32];
898 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
899 enum CodecID codec_id; /* see CODEC_ID_xxx */
900
901 /**
902 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
903 * this is used to workaround some encoder bugs
904 * - encoding: set by user, if not then the default based on codec_id will be used
905 * - decoding: set by user, will be converted to upper case by lavc during init
906 */
907 unsigned int codec_tag;
908
909 /**
910 * workaround bugs in encoders which sometimes cannot be detected automatically.
911 * - encoding: unused
912 * - decoding: set by user
913 */
914 int workaround_bugs;
915 #define FF_BUG_AUTODETECT 1 ///< autodetection
916 #define FF_BUG_OLD_MSMPEG4 2
917 #define FF_BUG_XVID_ILACE 4
918 #define FF_BUG_UMP4 8
919 #define FF_BUG_NO_PADDING 16
920 #define FF_BUG_AMV 32
921 #define FF_BUG_AC_VLC 0 ///< will be removed, libavcodec can now handle these non compliant files by default
922 #define FF_BUG_QPEL_CHROMA 64
923 #define FF_BUG_STD_QPEL 128
924 #define FF_BUG_QPEL_CHROMA2 256
925 #define FF_BUG_DIRECT_BLOCKSIZE 512
926 #define FF_BUG_EDGE 1024
927 #define FF_BUG_HPEL_CHROMA 2048
928 #define FF_BUG_DC_CLIP 4096
929 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
930
931 /**
932 * luma single coeff elimination threshold.
933 * - encoding: set by user
934 * - decoding: unused
935 */
936 int luma_elim_threshold;
937
938 /**
939 * chroma single coeff elimination threshold.
940 * - encoding: set by user
941 * - decoding: unused
942 */
943 int chroma_elim_threshold;
944
945 /**
946 * strictly follow the std (MPEG4, ...).
947 * - encoding: set by user
948 * - decoding: unused
949 */
950 int strict_std_compliance;
951
952 /**
953 * qscale offset between ip and b frames.
954 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
955 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
956 * - encoding: set by user.
957 * - decoding: unused
958 */
959 float b_quant_offset;
960
961 /**
962 * error resilience higher values will detect more errors but may missdetect
963 * some more or less valid parts as errors.
964 * - encoding: unused
965 * - decoding: set by user
966 */
967 int error_resilience;
968 #define FF_ER_CAREFULL 1
969 #define FF_ER_COMPLIANT 2
970 #define FF_ER_AGGRESSIVE 3
971 #define FF_ER_VERY_AGGRESSIVE 4
972
973 /**
974 * called at the beginning of each frame to get a buffer for it.
975 * if pic.reference is set then the frame will be read later by lavc
976 * avcodec_align_dimensions() should be used to find the required width and
977 * height, as they normally need to be rounded up to the next multiple of 16
978 * - encoding: unused
979 * - decoding: set by lavc, user can override
980 */
981 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
982
983 /**
984 * called to release buffers which where allocated with get_buffer.
985 * a released buffer can be reused in get_buffer()
986 * pic.data[*] must be set to NULL
987 * - encoding: unused
988 * - decoding: set by lavc, user can override
989 */
990 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
991
992 /**
993 * if 1 the stream has a 1 frame delay during decoding.
994 * - encoding: set by lavc
995 * - decoding: set by lavc
996 */
997 int has_b_frames;
998
999 int block_align; ///< used by some WAV based audio codecs
1000
1001 int parse_only; /* - decoding only: if true, only parsing is done
1002 (function avcodec_parse_frame()). The frame
1003 data is returned. Only MPEG codecs support this now. */
1004
1005 /**
1006 * 0-> h263 quant 1-> mpeg quant.
1007 * - encoding: set by user.
1008 * - decoding: unused
1009 */
1010 int mpeg_quant;
1011
1012 /**
1013 * pass1 encoding statistics output buffer.
1014 * - encoding: set by lavc
1015 * - decoding: unused
1016 */
1017 char *stats_out;
1018
1019 /**
1020 * pass2 encoding statistics input buffer.
1021 * concatenated stuff from stats_out of pass1 should be placed here
1022 * - encoding: allocated/set/freed by user
1023 * - decoding: unused
1024 */
1025 char *stats_in;
1026
1027 /**
1028 * ratecontrol qmin qmax limiting method.
1029 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
1030 * - encoding: set by user.
1031 * - decoding: unused
1032 */
1033 float rc_qsquish;
1034
1035 float rc_qmod_amp;
1036 int rc_qmod_freq;
1037
1038 /**
1039 * ratecontrol override, see RcOverride.
1040 * - encoding: allocated/set/freed by user.
1041 * - decoding: unused
1042 */
1043 RcOverride *rc_override;
1044 int rc_override_count;
1045
1046 /**
1047 * rate control equation.
1048 * - encoding: set by user
1049 * - decoding: unused
1050 */
1051 char *rc_eq;
1052
1053 /**
1054 * maximum bitrate.
1055 * - encoding: set by user.
1056 * - decoding: unused
1057 */
1058 int rc_max_rate;
1059
1060 /**
1061 * minimum bitrate.
1062 * - encoding: set by user.
1063 * - decoding: unused
1064 */
1065 int rc_min_rate;
1066
1067 /**
1068 * decoder bitstream buffer size.
1069 * - encoding: set by user.
1070 * - decoding: unused
1071 */
1072 int rc_buffer_size;
1073 float rc_buffer_aggressivity;
1074
1075 /**
1076 * qscale factor between p and i frames.
1077 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1078 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1079 * - encoding: set by user.
1080 * - decoding: unused
1081 */
1082 float i_quant_factor;
1083
1084 /**
1085 * qscale offset between p and i frames.
1086 * - encoding: set by user.
1087 * - decoding: unused
1088 */
1089 float i_quant_offset;
1090
1091 /**
1092 * initial complexity for pass1 ratecontrol.
1093 * - encoding: set by user.
1094 * - decoding: unused
1095 */
1096 float rc_initial_cplx;
1097
1098 /**
1099 * dct algorithm, see FF_DCT_* below.
1100 * - encoding: set by user
1101 * - decoding: unused
1102 */
1103 int dct_algo;
1104 #define FF_DCT_AUTO 0
1105 #define FF_DCT_FASTINT 1
1106 #define FF_DCT_INT 2
1107 #define FF_DCT_MMX 3
1108 #define FF_DCT_MLIB 4
1109 #define FF_DCT_ALTIVEC 5
1110 #define FF_DCT_FAAN 6
1111
1112 /**
1113 * luminance masking (0-> disabled).
1114 * - encoding: set by user
1115 * - decoding: unused
1116 */
1117 float lumi_masking;
1118
1119 /**
1120 * temporary complexity masking (0-> disabled).
1121 * - encoding: set by user
1122 * - decoding: unused
1123 */
1124 float temporal_cplx_masking;
1125
1126 /**
1127 * spatial complexity masking (0-> disabled).
1128 * - encoding: set by user
1129 * - decoding: unused
1130 */
1131 float spatial_cplx_masking;
1132
1133 /**
1134 * p block masking (0-> disabled).
1135 * - encoding: set by user
1136 * - decoding: unused
1137 */
1138 float p_masking;
1139
1140 /**
1141 * darkness masking (0-> disabled).
1142 * - encoding: set by user
1143 * - decoding: unused
1144 */
1145 float dark_masking;
1146
1147
1148 /* for binary compatibility */
1149 int unused;
1150
1151 /**
1152 * idct algorithm, see FF_IDCT_* below.
1153 * - encoding: set by user
1154 * - decoding: set by user
1155 */
1156 int idct_algo;
1157 #define FF_IDCT_AUTO 0
1158 #define FF_IDCT_INT 1
1159 #define FF_IDCT_SIMPLE 2
1160 #define FF_IDCT_SIMPLEMMX 3
1161 #define FF_IDCT_LIBMPEG2MMX 4
1162 #define FF_IDCT_PS2 5
1163 #define FF_IDCT_MLIB 6
1164 #define FF_IDCT_ARM 7
1165 #define FF_IDCT_ALTIVEC 8
1166 #define FF_IDCT_SH4 9
1167 #define FF_IDCT_SIMPLEARM 10
1168 #define FF_IDCT_H264 11
1169
1170 /**
1171 * slice count.
1172 * - encoding: set by lavc
1173 * - decoding: set by user (or 0)
1174 */
1175 int slice_count;
1176 /**
1177 * slice offsets in the frame in bytes.
1178 * - encoding: set/allocated by lavc
1179 * - decoding: set/allocated by user (or NULL)
1180 */
1181 int *slice_offset;
1182
1183 /**
1184 * error concealment flags.
1185 * - encoding: unused
1186 * - decoding: set by user
1187 */
1188 int error_concealment;
1189 #define FF_EC_GUESS_MVS 1
1190 #define FF_EC_DEBLOCK 2
1191
1192 /**
1193 * dsp_mask could be add used to disable unwanted CPU features
1194 * CPU features (i.e. MMX, SSE. ...)
1195 *
1196 * with FORCE flag you may instead enable given CPU features
1197 * (Dangerous: usable in case of misdetection, improper usage however will
1198 * result into program crash)
1199 */
1200 unsigned dsp_mask;
1201 #define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
1202 /* lower 16 bits - CPU features */
1203 #ifdef HAVE_MMX
1204 #define FF_MM_MMX 0x0001 /* standard MMX */
1205 #define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
1206 #define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
1207 #define FF_MM_SSE 0x0008 /* SSE functions */
1208 #define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
1209 #define FF_MM_3DNOWEXT 0x0020 /* AMD 3DNowExt */
1210 #endif /* HAVE_MMX */
1211
1212 /**
1213 * bits per sample/pixel from the demuxer (needed for huffyuv).
1214 * - encoding: set by lavc
1215 * - decoding: set by user
1216 */
1217 int bits_per_sample;
1218
1219 /**
1220 * prediction method (needed for huffyuv).
1221 * - encoding: set by user
1222 * - decoding: unused
1223 */
1224 int prediction_method;
1225 #define FF_PRED_LEFT 0
1226 #define FF_PRED_PLANE 1
1227 #define FF_PRED_MEDIAN 2
1228
1229 /**
1230 * sample aspect ratio (0 if unknown).
1231 * numerator and denominator must be relative prime and smaller then 256 for some video standards
1232 * - encoding: set by user.
1233 * - decoding: set by lavc.
1234 */
1235 AVRational sample_aspect_ratio;
1236
1237 /**
1238 * the picture in the bitstream.
1239 * - encoding: set by lavc
1240 * - decoding: set by lavc
1241 */
1242 AVFrame *coded_frame;
1243
1244 /**
1245 * debug.
1246 * - encoding: set by user.
1247 * - decoding: set by user.
1248 */
1249 int debug;
1250 #define FF_DEBUG_PICT_INFO 1
1251 #define FF_DEBUG_RC 2
1252 #define FF_DEBUG_BITSTREAM 4
1253 #define FF_DEBUG_MB_TYPE 8
1254 #define FF_DEBUG_QP 16
1255 #define FF_DEBUG_MV 32
1256 #define FF_DEBUG_DCT_COEFF 0x00000040
1257 #define FF_DEBUG_SKIP 0x00000080
1258 #define FF_DEBUG_STARTCODE 0x00000100
1259 #define FF_DEBUG_PTS 0x00000200
1260 #define FF_DEBUG_ER 0x00000400
1261 #define FF_DEBUG_MMCO 0x00000800
1262 #define FF_DEBUG_BUGS 0x00001000
1263 #define FF_DEBUG_VIS_QP 0x00002000
1264 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1265
1266 /**
1267 * debug.
1268 * - encoding: set by user.
1269 * - decoding: set by user.
1270 */
1271 int debug_mv;
1272 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1273 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1274 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1275
1276 /**
1277 * error.
1278 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1279 * - decoding: unused
1280 */
1281 uint64_t error[4];
1282
1283 /**
1284 * minimum MB quantizer.
1285 * - encoding: unused
1286 * - decoding: unused
1287 */
1288 int mb_qmin;
1289
1290 /**
1291 * maximum MB quantizer.
1292 * - encoding: unused
1293 * - decoding: unused
1294 */
1295 int mb_qmax;
1296
1297 /**
1298 * motion estimation compare function.
1299 * - encoding: set by user.
1300 * - decoding: unused
1301 */
1302 int me_cmp;
1303 /**
1304 * subpixel motion estimation compare function.
1305 * - encoding: set by user.
1306 * - decoding: unused
1307 */
1308 int me_sub_cmp;
1309 /**
1310 * macroblock compare function (not supported yet).
1311 * - encoding: set by user.
1312 * - decoding: unused
1313 */
1314 int mb_cmp;
1315 /**
1316 * interlaced dct compare function
1317 * - encoding: set by user.
1318 * - decoding: unused
1319 */
1320 int ildct_cmp;
1321 #define FF_CMP_SAD 0
1322 #define FF_CMP_SSE 1
1323 #define FF_CMP_SATD 2
1324 #define FF_CMP_DCT 3
1325 #define FF_CMP_PSNR 4
1326 #define FF_CMP_BIT 5
1327 #define FF_CMP_RD 6
1328 #define FF_CMP_ZERO 7
1329 #define FF_CMP_VSAD 8
1330 #define FF_CMP_VSSE 9
1331 #define FF_CMP_NSSE 10
1332 #define FF_CMP_W53 11
1333 #define FF_CMP_W97 12
1334 #define FF_CMP_DCTMAX 13
1335 #define FF_CMP_CHROMA 256
1336
1337 /**
1338 * ME diamond size & shape.
1339 * - encoding: set by user.
1340 * - decoding: unused
1341 */
1342 int dia_size;
1343
1344 /**
1345 * amount of previous MV predictors (2a+1 x 2a+1 square).
1346 * - encoding: set by user.
1347 * - decoding: unused
1348 */
1349 int last_predictor_count;
1350
1351 /**
1352 * pre pass for motion estimation.
1353 * - encoding: set by user.
1354 * - decoding: unused
1355 */
1356 int pre_me;
1357
1358 /**
1359 * motion estimation pre pass compare function.
1360 * - encoding: set by user.
1361 * - decoding: unused
1362 */
1363 int me_pre_cmp;
1364
1365 /**
1366 * ME pre pass diamond size & shape.
1367 * - encoding: set by user.
1368 * - decoding: unused
1369 */
1370 int pre_dia_size;
1371
1372 /**
1373 * subpel ME quality.
1374 * - encoding: set by user.
1375 * - decoding: unused
1376 */
1377 int me_subpel_quality;
1378
1379 /**
1380 * callback to negotiate the pixelFormat.
1381 * @param fmt is the list of formats which are supported by the codec,
1382 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1383 * the first is allways the native one
1384 * @return the choosen format
1385 * - encoding: unused
1386 * - decoding: set by user, if not set then the native format will always be choosen
1387 */
1388 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1389
1390 /**
1391 * DTG active format information (additionnal aspect ratio
1392 * information only used in DVB MPEG2 transport streams). 0 if
1393 * not set.
1394 *
1395 * - encoding: unused.
1396 * - decoding: set by decoder
1397 */
1398 int dtg_active_format;
1399 #define FF_DTG_AFD_SAME 8
1400 #define FF_DTG_AFD_4_3 9
1401 #define FF_DTG_AFD_16_9 10
1402 #define FF_DTG_AFD_14_9 11
1403 #define FF_DTG_AFD_4_3_SP_14_9 13
1404 #define FF_DTG_AFD_16_9_SP_14_9 14
1405 #define FF_DTG_AFD_SP_4_3 15
1406
1407 /**
1408 * Maximum motion estimation search range in subpel units.
1409 * if 0 then no limit
1410 *
1411 * - encoding: set by user.
1412 * - decoding: unused.
1413 */
1414 int me_range;
1415
1416 /**
1417 * frame_rate_base.
1418 * for variable fps this is 1
1419 * - encoding: set by user.
1420 * - decoding: set by lavc.
1421 * @todo move this after frame_rate
1422 */
1423
1424 int frame_rate_base;
1425 /**
1426 * intra quantizer bias.
1427 * - encoding: set by user.
1428 * - decoding: unused
1429 */
1430 int intra_quant_bias;
1431 #define FF_DEFAULT_QUANT_BIAS 999999
1432
1433 /**
1434 * inter quantizer bias.
1435 * - encoding: set by user.
1436 * - decoding: unused
1437 */
1438 int inter_quant_bias;
1439
1440 /**
1441 * color table ID.
1442 * - encoding: unused.
1443 * - decoding: which clrtable should be used for 8bit RGB images
1444 * table have to be stored somewhere FIXME
1445 */
1446 int color_table_id;
1447
1448 /**
1449 * internal_buffer count.
1450 * Dont touch, used by lavc default_get_buffer()
1451 */
1452 int internal_buffer_count;
1453
1454 /**
1455 * internal_buffers.
1456 * Dont touch, used by lavc default_get_buffer()
1457 */
1458 void *internal_buffer;
1459
1460 #define FF_LAMBDA_SHIFT 7
1461 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1462 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1463 #define FF_LAMBDA_MAX (256*128-1)
1464
1465 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1466 /**
1467 * global quality for codecs which cannot change it per frame.
1468 * this should be proportional to MPEG1/2/4 qscale.
1469 * - encoding: set by user.
1470 * - decoding: unused
1471 */
1472 int global_quality;
1473
1474 #define FF_CODER_TYPE_VLC 0
1475 #define FF_CODER_TYPE_AC 1
1476 /**
1477 * coder type
1478 * - encoding: set by user.
1479 * - decoding: unused
1480 */
1481 int coder_type;
1482
1483 /**
1484 * context model
1485 * - encoding: set by user.
1486 * - decoding: unused
1487 */
1488 int context_model;
1489
1490 /**
1491 * slice flags
1492 * - encoding: unused
1493 * - decoding: set by user.
1494 */
1495 int slice_flags;
1496 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1497 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1498 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1499
1500 /**
1501 * XVideo Motion Acceleration
1502 * - encoding: forbidden
1503 * - decoding: set by decoder
1504 */
1505 int xvmc_acceleration;
1506
1507 /**
1508 * macroblock decision mode
1509 * - encoding: set by user.
1510 * - decoding: unused
1511 */
1512 int mb_decision;
1513 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1514 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1515 #define FF_MB_DECISION_RD 2 ///< rate distoration
1516
1517 /**
1518 * custom intra quantization matrix
1519 * - encoding: set by user, can be NULL
1520 * - decoding: set by lavc
1521 */
1522 uint16_t *intra_matrix;
1523
1524 /**
1525 * custom inter quantization matrix
1526 * - encoding: set by user, can be NULL
1527 * - decoding: set by lavc
1528 */
1529 uint16_t *inter_matrix;
1530
1531 /**
1532 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1533 * this is used to workaround some encoder bugs
1534 * - encoding: unused
1535 * - decoding: set by user, will be converted to upper case by lavc during init
1536 */
1537 unsigned int stream_codec_tag;
1538
1539 /**
1540 * scene change detection threshold.
1541 * 0 is default, larger means fewer detected scene changes
1542 * - encoding: set by user.
1543 * - decoding: unused
1544 */
1545 int scenechange_threshold;
1546
1547 /**
1548 * minimum lagrange multipler
1549 * - encoding: set by user.
1550 * - decoding: unused
1551 */
1552 int lmin;
1553
1554 /**
1555 * maximum lagrange multipler
1556 * - encoding: set by user.
1557 * - decoding: unused
1558 */
1559 int lmax;
1560
1561 /**
1562 * Palette control structure
1563 * - encoding: ??? (no palette-enabled encoder yet)
1564 * - decoding: set by user.
1565 */
1566 struct AVPaletteControl *palctrl;
1567
1568 /**
1569 * noise reduction strength
1570 * - encoding: set by user.
1571 * - decoding: unused
1572 */
1573 int noise_reduction;
1574
1575 /**
1576 * called at the beginning of a frame to get cr buffer for it.
1577 * buffer type (size, hints) must be the same. lavc won't check it.
1578 * lavc will pass previous buffer in pic, function should return
1579 * same buffer or new buffer with old frame "painted" into it.
1580 * if pic.data[0] == NULL must behave like get_buffer().
1581 * - encoding: unused
1582 * - decoding: set by lavc, user can override
1583 */
1584 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1585
1586 /**
1587 * number of bits which should be loaded into the rc buffer before decoding starts
1588 * - encoding: set by user.
1589 * - decoding: unused
1590 */
1591 int rc_initial_buffer_occupancy;
1592
1593 /**
1594 *
1595 * - encoding: set by user.
1596 * - decoding: unused
1597 */
1598 int inter_threshold;
1599
1600 /**
1601 * CODEC_FLAG2_*.
1602 * - encoding: set by user.
1603 * - decoding: set by user.
1604 */
1605 int flags2;
1606
1607 /**
1608 * simulates errors in the bitstream to test error concealment.
1609 * - encoding: set by user.
1610 * - decoding: unused.
1611 */
1612 int error_rate;
1613
1614 /**
1615 * MP3 antialias algorithm, see FF_AA_* below.
1616 * - encoding: unused
1617 * - decoding: set by user
1618 */
1619 int antialias_algo;
1620 #define FF_AA_AUTO 0
1621 #define FF_AA_FASTINT 1 //not implemented yet
1622 #define FF_AA_INT 2
1623 #define FF_AA_FLOAT 3
1624 /**
1625 * Quantizer noise shaping.
1626 * - encoding: set by user
1627 * - decoding: unused
1628 */
1629 int quantizer_noise_shaping;
1630
1631 /**
1632 * Thread count.
1633 * is used to decide how many independant tasks should be passed to execute()
1634 * - encoding: set by user
1635 * - decoding: set by user
1636 */
1637 int thread_count;
1638
1639 /**
1640 * the codec may call this to execute several independant things. it will return only after
1641 * finishing all tasks, the user may replace this with some multithreaded implementation, the
1642 * default implementation will execute the parts serially
1643 * @param count the number of things to execute
1644 * - encoding: set by lavc, user can override
1645 * - decoding: set by lavc, user can override
1646 */
1647 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1648
1649 /**
1650 * Thread opaque.
1651 * can be used by execute() to store some per AVCodecContext stuff.
1652 * - encoding: set by execute()
1653 * - decoding: set by execute()
1654 */
1655 void *thread_opaque;
1656
1657 /**
1658 * Motion estimation threshold. under which no motion estimation is
1659 * performed, but instead the user specified motion vectors are used
1660 *
1661 * - encoding: set by user
1662 * - decoding: unused
1663 */
1664 int me_threshold;
1665
1666 /**
1667 * Macroblock threshold. under which the user specified macroblock types will be used
1668 * - encoding: set by user
1669 * - decoding: unused
1670 */
1671 int mb_threshold;
1672
1673 /**
1674 * precision of the intra dc coefficient - 8.
1675 * - encoding: set by user
1676 * - decoding: unused
1677 */
1678 int intra_dc_precision;
1679
1680 /**
1681 * noise vs. sse weight for the nsse comparsion function.
1682 * - encoding: set by user
1683 * - decoding: unused
1684 */
1685 int nsse_weight;
1686
1687 /**
1688 * number of macroblock rows at the top which are skiped.
1689 * - encoding: unused
1690 * - decoding: set by user
1691 */
1692 int skip_top;
1693
1694 /**
1695 * number of macroblock rows at the bottom which are skiped.
1696 * - encoding: unused
1697 * - decoding: set by user
1698 */
1699 int skip_bottom;
1700
1701 /**
1702 * profile
1703 * - encoding: set by user
1704 * - decoding: set by lavc
1705 */
1706 int profile;
1707 #define FF_PROFILE_UNKNOWN -99
1708
1709 /**
1710 * level
1711 * - encoding: set by user
1712 * - decoding: set by lavc
1713 */
1714 int level;
1715 #define FF_LEVEL_UNKNOWN -99
1716
1717 /**
1718 * low resolution decoding. 1-> 1/2 size, 2->1/4 size
1719 * - encoding: unused
1720 * - decoding: set by user
1721 */
1722 int lowres;
1723
1724 /**
1725 * bitsream width / height. may be different from width/height if lowres
1726 * or other things are used
1727 * - encoding: unused
1728 * - decoding: set by user before init if known, codec should override / dynamically change if needed
1729 */
1730 int coded_width, coded_height;
1731
1732 /**
1733 * frame skip threshold
1734 * - encoding: set by user
1735 * - decoding: unused
1736 */
1737 int frame_skip_threshold;
1738
1739 /**
1740 * frame skip factor
1741 * - encoding: set by user
1742 * - decoding: unused
1743 */
1744 int frame_skip_factor;
1745
1746 /**
1747 * frame skip exponent
1748 * - encoding: set by user
1749 * - decoding: unused
1750 */
1751 int frame_skip_exp;
1752
1753 /**
1754 * frame skip comparission function
1755 * - encoding: set by user.
1756 * - decoding: unused
1757 */
1758 int frame_skip_cmp;
1759
1760 /**
1761 * border processing masking. raises the quantizer for mbs on the borders
1762 * of the picture.
1763 * - encoding: set by user
1764 * - decoding: unused
1765 */
1766 float border_masking;
1767
1768 /**
1769 * minimum MB lagrange multipler.
1770 * - encoding: set by user.
1771 * - decoding: unused
1772 */
1773 int mb_lmin;
1774
1775 /**
1776 * maximum MB lagrange multipler.
1777 * - encoding: set by user.
1778 * - decoding: unused
1779 */
1780 int mb_lmax;
1781 } AVCodecContext;
1782
1783
1784 /**
1785 * AVOption.
1786 */
1787 typedef struct AVOption {
1788 /** options' name */
1789 const char *name; /* if name is NULL, it indicates a link to next */
1790 /** short English text help or const struct AVOption* subpointer */
1791 const char *help; // const struct AVOption* sub;
1792 /** offset to context structure where the parsed value should be stored */
1793 int offset;
1794 /** options' type */
1795 int type;
1796 #define FF_OPT_TYPE_BOOL 1 ///< boolean - true,1,on (or simply presence)
1797 #define FF_OPT_TYPE_DOUBLE 2 ///< double
1798 #define FF_OPT_TYPE_INT 3 ///< integer
1799 #define FF_OPT_TYPE_STRING 4 ///< string (finished with \0)
1800 #define FF_OPT_TYPE_MASK 0x1f ///< mask for types - upper bits are various flags
1801 //#define FF_OPT_TYPE_EXPERT 0x20 // flag for expert option
1802 #define FF_OPT_TYPE_FLAG (FF_OPT_TYPE_BOOL | 0x40)
1803 #define FF_OPT_TYPE_RCOVERRIDE (FF_OPT_TYPE_STRING | 0x80)
1804 /** min value (min == max -> no limits) */
1805 double min;
1806 /** maximum value for double/int */
1807 double max;
1808 /** default boo [0,1]l/double/int value */
1809 double defval;
1810 /**
1811 * default string value (with optional semicolon delimited extra option-list
1812 * i.e. option1;option2;option3
1813 * defval might select other then first argument as default
1814 */
1815 const char *defstr;
1816 #define FF_OPT_MAX_DEPTH 10
1817 } AVOption;
1818
1819 /**
1820 * Parse option(s) and sets fields in passed structure
1821 * @param strct structure where the parsed results will be written
1822 * @param list list with AVOptions
1823 * @param opts string with options for parsing
1824 */
1825 int avoption_parse(void* strct, const AVOption* list, const char* opts);
1826
1827
1828 /**
1829 * AVCodec.
1830 */
1831 typedef struct AVCodec {
1832 const char *name;
1833 enum CodecType type;
1834 enum CodecID id;
1835 int priv_data_size;
1836 int (*init)(AVCodecContext *);
1837 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
1838 int (*close)(AVCodecContext *);
1839 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
1840 uint8_t *buf, int buf_size);
1841 int capabilities;
1842 const AVOption *options;
1843 struct AVCodec *next;
1844 void (*flush)(AVCodecContext *);
1845 const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
1846 const enum PixelFormat *pix_fmts; ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
1847 } AVCodec;
1848
1849 /**
1850 * four components are given, that's all.
1851 * the last component is alpha
1852 */
1853 typedef struct AVPicture {
1854 uint8_t *data[4];
1855 int linesize[4]; ///< number of bytes per line
1856 } AVPicture;
1857
1858 /**
1859 * AVPaletteControl
1860 * This structure defines a method for communicating palette changes
1861 * between and demuxer and a decoder.
1862 */
1863 #define AVPALETTE_SIZE 1024
1864 #define AVPALETTE_COUNT 256
1865 typedef struct AVPaletteControl {
1866
1867 /* demuxer sets this to 1 to indicate the palette has changed;
1868 * decoder resets to 0 */
1869 int palette_changed;
1870
1871 /* 4-byte ARGB palette entries, stored in native byte order; note that
1872 * the individual palette components should be on a 8-bit scale; if
1873 * the palette data comes from a IBM VGA native format, the component
1874 * data is probably 6 bits in size and needs to be scaled */
1875 unsigned int palette[AVPALETTE_COUNT];
1876
1877 } AVPaletteControl;
1878
1879 extern AVCodec ac3_encoder;
1880 extern AVCodec mp2_encoder;
1881 extern AVCodec mp3lame_encoder;
1882 extern AVCodec oggvorbis_encoder;
1883 extern AVCodec oggtheora_encoder;
1884 extern AVCodec faac_encoder;
1885 extern AVCodec xvid_encoder;
1886 extern AVCodec mpeg1video_encoder;
1887 extern AVCodec mpeg2video_encoder;
1888 extern AVCodec h261_encoder;
1889 extern AVCodec h263_encoder;
1890 extern AVCodec h263p_encoder;
1891 extern AVCodec flv_encoder;
1892 extern AVCodec rv10_encoder;
1893 extern AVCodec rv20_encoder;
1894 extern AVCodec dvvideo_encoder;
1895 extern AVCodec mjpeg_encoder;
1896 extern AVCodec ljpeg_encoder;
1897 extern AVCodec png_encoder;
1898 extern AVCodec ppm_encoder;
1899 extern AVCodec pgm_encoder;
1900 extern AVCodec pgmyuv_encoder;
1901 extern AVCodec pbm_encoder;
1902 extern AVCodec pam_encoder;
1903 extern AVCodec mpeg4_encoder;
1904 extern AVCodec msmpeg4v1_encoder;
1905 extern AVCodec msmpeg4v2_encoder;
1906 extern AVCodec msmpeg4v3_encoder;
1907 extern AVCodec wmv1_encoder;
1908 extern AVCodec wmv2_encoder;
1909 extern AVCodec huffyuv_encoder;
1910 extern AVCodec ffvhuff_encoder;
1911 extern AVCodec h264_encoder;
1912 extern AVCodec asv1_encoder;
1913 extern AVCodec asv2_encoder;
1914 extern AVCodec vcr1_encoder;
1915 extern AVCodec ffv1_encoder;
1916 extern AVCodec snow_encoder;
1917 extern AVCodec mdec_encoder;
1918 extern AVCodec zlib_encoder;
1919 extern AVCodec sonic_encoder;
1920 extern AVCodec sonic_ls_encoder;
1921 extern AVCodec svq1_encoder;
1922
1923 extern AVCodec h263_decoder;
1924 extern AVCodec h261_decoder;
1925 extern AVCodec mpeg4_decoder;
1926 extern AVCodec msmpeg4v1_decoder;
1927 extern AVCodec msmpeg4v2_decoder;
1928 extern AVCodec msmpeg4v3_decoder;
1929 extern AVCodec wmv1_decoder;
1930 extern AVCodec wmv2_decoder;
1931 extern AVCodec vc9_decoder;
1932 extern AVCodec wmv3_decoder;
1933 extern AVCodec mpeg1video_decoder;
1934 extern AVCodec mpeg2video_decoder;
1935 extern AVCodec mpegvideo_decoder;
1936 extern AVCodec mpeg_xvmc_decoder;
1937 extern AVCodec h263i_decoder;
1938 extern AVCodec flv_decoder;
1939 extern AVCodec rv10_decoder;
1940 extern AVCodec rv20_decoder;
1941 extern AVCodec rv30_decoder;
1942 extern AVCodec rv40_decoder;
1943 extern AVCodec svq1_decoder;
1944 extern AVCodec svq3_decoder;
1945 extern AVCodec dvvideo_decoder;
1946 extern AVCodec wmav1_decoder;
1947 extern AVCodec wmav2_decoder;
1948 extern AVCodec mjpeg_decoder;
1949 extern AVCodec mjpegb_decoder;
1950 extern AVCodec sp5x_decoder;
1951 extern AVCodec png_decoder;
1952 extern AVCodec mp2_decoder;
1953 extern AVCodec mp3_decoder;
1954 extern AVCodec mp3adu_decoder;
1955 extern AVCodec mp3on4_decoder;
1956 extern AVCodec mace3_decoder;
1957 extern AVCodec mace6_decoder;
1958 extern AVCodec huffyuv_decoder;
1959 extern AVCodec ffvhuff_decoder;
1960 extern AVCodec oggvorbis_decoder;
1961 extern AVCodec oggtheora_decoder;
1962 extern AVCodec cyuv_decoder;
1963 extern AVCodec h264_decoder;
1964 extern AVCodec indeo3_decoder;
1965 extern AVCodec vp3_decoder;
1966 extern AVCodec theora_decoder;
1967 extern AVCodec amr_nb_decoder;
1968 extern AVCodec amr_nb_encoder;
1969 extern AVCodec amr_wb_encoder;
1970 extern AVCodec amr_wb_decoder;
1971 extern AVCodec aac_decoder;
1972 extern AVCodec mpeg4aac_decoder;
1973 extern AVCodec asv1_decoder;
1974 extern AVCodec asv2_decoder;
1975 extern AVCodec vcr1_decoder;
1976 extern AVCodec cljr_decoder;
1977 extern AVCodec ffv1_decoder;
1978 extern AVCodec snow_decoder;
1979 extern AVCodec fourxm_decoder;
1980 extern AVCodec mdec_decoder;
1981 extern AVCodec roq_decoder;
1982 extern AVCodec interplay_video_decoder;
1983 extern AVCodec xan_wc3_decoder;
1984 extern AVCodec rpza_decoder;
1985 extern AVCodec cinepak_decoder;
1986 extern AVCodec msrle_decoder;
1987 extern AVCodec msvideo1_decoder;
1988 extern AVCodec vqa_decoder;
1989 extern AVCodec idcin_decoder;
1990 extern AVCodec eightbps_decoder;
1991 extern AVCodec smc_decoder;
1992 extern AVCodec flic_decoder;
1993 extern AVCodec vmdvideo_decoder;
1994 extern AVCodec vmdaudio_decoder;
1995 extern AVCodec truemotion1_decoder;
1996 extern AVCodec mszh_decoder;
1997 extern AVCodec zlib_decoder;
1998 extern AVCodec ra_144_decoder;
1999 extern AVCodec ra_288_decoder;
2000 extern AVCodec roq_dpcm_decoder;
2001 extern AVCodec interplay_dpcm_decoder;
2002 extern AVCodec xan_dpcm_decoder;
2003 extern AVCodec sol_dpcm_decoder;
2004 extern AVCodec sonic_decoder;
2005 extern AVCodec qtrle_decoder;
2006 extern AVCodec flac_decoder;
2007 extern AVCodec tscc_decoder;
2008 extern AVCodec ulti_decoder;
2009 extern AVCodec qdraw_decoder;
2010 extern AVCodec xl_decoder;
2011 extern AVCodec qpeg_decoder;
2012 extern AVCodec shorten_decoder;
2013 extern AVCodec loco_decoder;
2014
2015 /* pcm codecs */
2016 #define PCM_CODEC(id, name) \
2017 extern AVCodec name ## _decoder; \
2018 extern AVCodec name ## _encoder
2019
2020 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
2021 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
2022 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
2023 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
2024 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
2025 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
2026 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
2027 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
2028
2029 /* adpcm codecs */
2030
2031 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
2032 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
2033 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
2034 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
2035 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
2036 PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
2037 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
2038 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
2039 PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
2040 PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
2041 PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
2042 PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
2043 PCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
2044 PCM_CODEC(CODEC_ID_ADPCM_SWF, adpcm_swf);
2045
2046 #undef PCM_CODEC
2047
2048 /* dummy raw video codec */
2049 extern AVCodec rawvideo_encoder;
2050 extern AVCodec rawvideo_decoder;
2051
2052 /* the following codecs use external GPL libs */
2053 extern AVCodec ac3_decoder;
2054 extern AVCodec dts_decoder;
2055
2056 /* resample.c */
2057
2058 struct ReSampleContext;
2059 struct AVResampleContext;
2060
2061 typedef struct ReSampleContext ReSampleContext;
2062
2063 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2064 int output_rate, int input_rate);
2065 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2066 void audio_resample_close(ReSampleContext *s);
2067
2068 struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2069 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2070 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2071 void av_resample_close(struct AVResampleContext *c);
2072
2073 /* YUV420 format is assumed ! */
2074
2075 struct ImgReSampleContext;
2076
2077 typedef struct ImgReSampleContext ImgReSampleContext;
2078
2079 ImgReSampleContext *img_resample_init(int output_width, int output_height,
2080 int input_width, int input_height);
2081
2082 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
2083 int iwidth, int iheight,
2084 int topBand, int bottomBand,
2085 int leftBand, int rightBand,
2086 int padtop, int padbottom,
2087 int padleft, int padright);
2088
2089
2090 void img_resample(ImgReSampleContext *s,
2091 AVPicture *output, const AVPicture *input);
2092
2093 void img_resample_close(ImgReSampleContext *s);
2094
2095 /**
2096 * Allocate memory for a picture. Call avpicture_free to free it.
2097 *
2098 * @param picture the picture to be filled in.
2099 * @param pix_fmt the format of the picture.
2100 * @param width the width of the picture.
2101 * @param height the height of the picture.
2102 * @return 0 if successful, -1 if not.
2103 */
2104 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2105
2106 /* Free a picture previously allocated by avpicture_alloc. */
2107 void avpicture_free(AVPicture *picture);
2108
2109 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2110 int pix_fmt, int width, int height);
2111 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2112 unsigned char *dest, int dest_size);
2113 int avpicture_get_size(int pix_fmt, int width, int height);
2114 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2115 const char *avcodec_get_pix_fmt_name(int pix_fmt);
2116 void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2117 enum PixelFormat avcodec_get_pix_fmt(const char* name);
2118 unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2119
2120 #define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
2121 #define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
2122 #define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
2123 #define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
2124 #define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
2125 #define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
2126
2127 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2128 int has_alpha);
2129 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2130 int has_alpha, int *loss_ptr);
2131
2132 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
2133 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
2134 int img_get_alpha_info(const AVPicture *src,
2135 int pix_fmt, int width, int height);
2136
2137 /* convert among pixel formats */
2138 int img_convert(AVPicture *dst, int dst_pix_fmt,
2139 const AVPicture *src, int pix_fmt,
2140 int width, int height);
2141
2142 /* deinterlace a picture */
2143 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2144 int pix_fmt, int width, int height);
2145
2146 /* external high level API */
2147
2148 extern AVCodec *first_avcodec;
2149
2150 /* returns LIBAVCODEC_VERSION_INT constant */
2151 unsigned avcodec_version(void);
2152 /* returns LIBAVCODEC_BUILD constant */
2153 unsigned avcodec_build(void);
2154 void avcodec_init(void);
2155
2156 void register_avcodec(AVCodec *format);
2157 AVCodec *avcodec_find_encoder(enum CodecID id);
2158 AVCodec *avcodec_find_encoder_by_name(const char *name);
2159 AVCodec *avcodec_find_decoder(enum CodecID id);
2160 AVCodec *avcodec_find_decoder_by_name(const char *name);
2161 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2162
2163 void avcodec_get_context_defaults(AVCodecContext *s);
2164 AVCodecContext *avcodec_alloc_context(void);
2165 void avcodec_get_frame_defaults(AVFrame *pic);
2166 AVFrame *avcodec_alloc_frame(void);
2167
2168 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2169 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2170 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2171 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2172 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2173 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2174
2175 int avcodec_thread_init(AVCodecContext *s, int thread_count);
2176 void avcodec_thread_free(AVCodecContext *s);
2177 int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2178 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2179 //FIXME func typedef
2180
2181 /**
2182 * opens / inits the AVCodecContext.
2183 * not thread save!
2184 */
2185 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2186
2187 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2188 int *frame_size_ptr,
2189 uint8_t *buf, int buf_size);
2190 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2191 int *got_picture_ptr,
2192 uint8_t *buf, int buf_size);
2193 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2194 int *data_size_ptr,
2195 uint8_t *buf, int buf_size);
2196 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2197 const short *samples);
2198 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2199 const AVFrame *pict);
2200
2201 int avcodec_close(AVCodecContext *avctx);
2202
2203 void avcodec_register_all(void);
2204
2205 void avcodec_flush_buffers(AVCodecContext *avctx);
2206
2207 void avcodec_default_free_buffers(AVCodecContext *s);
2208
2209 /* misc usefull functions */
2210
2211 /**
2212 * returns a single letter to describe the picture type
2213 */
2214 char av_get_pict_type_char(int pict_type);
2215
2216 /**
2217 * reduce a fraction.
2218 * this is usefull for framerate calculations
2219 * @param max the maximum allowed for dst_nom & dst_den
2220 * @return 1 if exact, 0 otherwise
2221 */
2222 int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max);
2223
2224 /**
2225 * rescale a 64bit integer with rounding to nearest.
2226 * a simple a*b/c isnt possible as it can overflow
2227 */
2228 int64_t av_rescale(int64_t a, int64_t b, int64_t c);
2229
2230 /**
2231 * rescale a 64bit integer with specified rounding.
2232 * a simple a*b/c isnt possible as it can overflow
2233 */
2234 int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding);
2235
2236 /* frame parsing */
2237 typedef struct AVCodecParserContext {
2238 void *priv_data;
2239 struct AVCodecParser *parser;
2240 int64_t frame_offset; /* offset of the current frame */
2241 int64_t cur_offset; /* current offset
2242 (incremented by each av_parser_parse()) */
2243 int64_t last_frame_offset; /* offset of the last frame */
2244 /* video info */
2245 int pict_type; /* XXX: put it back in AVCodecContext */
2246 int repeat_pict; /* XXX: put it back in AVCodecContext */
2247 int64_t pts; /* pts of the current frame */
2248 int64_t dts; /* dts of the current frame */
2249
2250 /* private data */
2251 int64_t last_pts;
2252 int64_t last_dts;
2253 int fetch_timestamp;
2254
2255 #define AV_PARSER_PTS_NB 4
2256 int cur_frame_start_index;
2257 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2258 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2259 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2260 } AVCodecParserContext;
2261
2262 typedef struct AVCodecParser {
2263 int codec_ids[5]; /* several codec IDs are permitted */
2264 int priv_data_size;
2265 int (*parser_init)(AVCodecParserContext *s);
2266 int (*parser_parse)(AVCodecParserContext *s,
2267 AVCodecContext *avctx,
2268 uint8_t **poutbuf, int *poutbuf_size,
2269 const uint8_t *buf, int buf_size);
2270 void (*parser_close)(AVCodecParserContext *s);
2271 struct AVCodecParser *next;
2272 } AVCodecParser;
2273
2274 extern AVCodecParser *av_first_parser;
2275
2276 void av_register_codec_parser(AVCodecParser *parser);
2277 AVCodecParserContext *av_parser_init(int codec_id);
2278 int av_parser_parse(AVCodecParserContext *s,
2279 AVCodecContext *avctx,
2280 uint8_t **poutbuf, int *poutbuf_size,
2281 const uint8_t *buf, int buf_size,
2282 int64_t pts, int64_t dts);
2283 void av_parser_close(AVCodecParserContext *s);
2284
2285 extern AVCodecParser mpegvideo_parser;
2286 extern AVCodecParser mpeg4video_parser;
2287 extern AVCodecParser h261_parser;
2288 extern AVCodecParser h263_parser;
2289 extern AVCodecParser h264_parser;
2290 extern AVCodecParser mjpeg_parser;
2291 extern AVCodecParser pnm_parser;
2292 extern AVCodecParser mpegaudio_parser;
2293 extern AVCodecParser ac3_parser;
2294
2295 /* memory */
2296 void *av_malloc(unsigned int size);
2297 void *av_mallocz(unsigned int size);
2298 void *av_realloc(void *ptr, unsigned int size);
2299 void av_free(void *ptr);
2300 char *av_strdup(const char *s);
2301 void av_freep(void *ptr);
2302 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2303 /* for static data only */
2304 /* call av_free_static to release all staticaly allocated tables */
2305 void av_free_static(void);
2306 void *av_mallocz_static(unsigned int size);
2307 void *av_realloc_static(void *ptr, unsigned int size);
2308
2309 /* add by bero : in adx.c */
2310 int is_adx(const unsigned char *buf,size_t bufsize);
2311
2312 void img_copy(AVPicture *dst, const AVPicture *src,
2313 int pix_fmt, int width, int height);
2314
2315 /* av_log API */
2316
2317 #include <stdarg.h>
2318
2319 #define AV_LOG_QUIET -1
2320 #define AV_LOG_ERROR 0
2321 #define AV_LOG_INFO 1
2322 #define AV_LOG_DEBUG 2
2323
2324 #ifdef __GNUC__
2325 extern void av_log(void*, int level, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 3, 4)));
2326 #else
2327 extern void av_log(void*, int level, const char *fmt, ...);
2328 #endif
2329
2330 extern void av_vlog(void*, int level, const char *fmt, va_list);
2331 extern int av_log_get_level(void);
2332 extern void av_log_set_level(int);
2333 extern void av_log_set_callback(void (*)(void*, int, const char*, va_list));
2334
2335 /* endian macros */
2336 #if !defined(BE_16) || !defined(BE_32) || !defined(LE_16) || !defined(LE_32)
2337 #define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
2338 #define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
2339 (((uint8_t*)(x))[1] << 16) | \
2340 (((uint8_t*)(x))[2] << 8) | \
2341 ((uint8_t*)(x))[3])
2342 #define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
2343 #define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \
2344 (((uint8_t*)(x))[2] << 16) | \
2345 (((uint8_t*)(x))[1] << 8) | \
2346 ((uint8_t*)(x))[0])
2347 #endif
2348
2349 #ifdef __cplusplus
2350 }
2351 #endif
2352
2353 #endif /* AVCODEC_H */