new opensource lossy/lossless audio codec based on speech compression techniques...
[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 4721
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_MP2,
42 CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
43 CODEC_ID_VORBIS,
44 CODEC_ID_AC3,
45 CODEC_ID_MJPEG,
46 CODEC_ID_MJPEGB,
47 CODEC_ID_LJPEG,
48 CODEC_ID_SP5X,
49 CODEC_ID_MPEG4,
50 CODEC_ID_RAWVIDEO,
51 CODEC_ID_MSMPEG4V1,
52 CODEC_ID_MSMPEG4V2,
53 CODEC_ID_MSMPEG4V3,
54 CODEC_ID_WMV1,
55 CODEC_ID_WMV2,
56 CODEC_ID_H263P,
57 CODEC_ID_H263I,
58 CODEC_ID_FLV1,
59 CODEC_ID_SVQ1,
60 CODEC_ID_SVQ3,
61 CODEC_ID_DVVIDEO,
62 CODEC_ID_DVAUDIO,
63 CODEC_ID_WMAV1,
64 CODEC_ID_WMAV2,
65 CODEC_ID_MACE3,
66 CODEC_ID_MACE6,
67 CODEC_ID_HUFFYUV,
68 CODEC_ID_CYUV,
69 CODEC_ID_H264,
70 CODEC_ID_INDEO3,
71 CODEC_ID_VP3,
72 CODEC_ID_THEORA,
73 CODEC_ID_AAC,
74 CODEC_ID_MPEG4AAC,
75 CODEC_ID_ASV1,
76 CODEC_ID_ASV2,
77 CODEC_ID_FFV1,
78 CODEC_ID_4XM,
79 CODEC_ID_VCR1,
80 CODEC_ID_CLJR,
81 CODEC_ID_MDEC,
82 CODEC_ID_ROQ,
83 CODEC_ID_INTERPLAY_VIDEO,
84 CODEC_ID_XAN_WC3,
85 CODEC_ID_XAN_WC4,
86 CODEC_ID_RPZA,
87 CODEC_ID_CINEPAK,
88 CODEC_ID_WS_VQA,
89 CODEC_ID_MSRLE,
90 CODEC_ID_MSVIDEO1,
91 CODEC_ID_IDCIN,
92 CODEC_ID_8BPS,
93 CODEC_ID_SMC,
94 CODEC_ID_FLIC,
95 CODEC_ID_TRUEMOTION1,
96 CODEC_ID_VMDVIDEO,
97 CODEC_ID_VMDAUDIO,
98 CODEC_ID_MSZH,
99 CODEC_ID_ZLIB,
100 CODEC_ID_SONIC,
101 CODEC_ID_SONIC_LS,
102 CODEC_ID_QTRLE,
103 CODEC_ID_SNOW,
104 CODEC_ID_TSCC,
105
106 /* various pcm "codecs" */
107 CODEC_ID_PCM_S16LE,
108 CODEC_ID_PCM_S16BE,
109 CODEC_ID_PCM_U16LE,
110 CODEC_ID_PCM_U16BE,
111 CODEC_ID_PCM_S8,
112 CODEC_ID_PCM_U8,
113 CODEC_ID_PCM_MULAW,
114 CODEC_ID_PCM_ALAW,
115
116 /* various adpcm codecs */
117 CODEC_ID_ADPCM_IMA_QT,
118 CODEC_ID_ADPCM_IMA_WAV,
119 CODEC_ID_ADPCM_IMA_DK3,
120 CODEC_ID_ADPCM_IMA_DK4,
121 CODEC_ID_ADPCM_IMA_WS,
122 CODEC_ID_ADPCM_IMA_SMJPEG,
123 CODEC_ID_ADPCM_MS,
124 CODEC_ID_ADPCM_4XM,
125 CODEC_ID_ADPCM_XA,
126 CODEC_ID_ADPCM_ADX,
127 CODEC_ID_ADPCM_EA,
128 CODEC_ID_ADPCM_G726,
129
130 /* AMR */
131 CODEC_ID_AMR_NB,
132 CODEC_ID_AMR_WB,
133
134 /* RealAudio codecs*/
135 CODEC_ID_RA_144,
136 CODEC_ID_RA_288,
137
138 /* various DPCM codecs */
139 CODEC_ID_ROQ_DPCM,
140 CODEC_ID_INTERPLAY_DPCM,
141 CODEC_ID_XAN_DPCM,
142
143 CODEC_ID_FLAC,
144
145 CODEC_ID_MPEG2TS, /* _FAKE_ codec to indicate a raw MPEG2 transport
146 stream (only used by libavformat) */
147
148 CODEC_ID_DTS,
149 CODEC_ID_XVID,
150 };
151
152 /* CODEC_ID_MP3LAME is absolete */
153 #define CODEC_ID_MP3LAME CODEC_ID_MP3
154
155 enum CodecType {
156 CODEC_TYPE_UNKNOWN = -1,
157 CODEC_TYPE_VIDEO,
158 CODEC_TYPE_AUDIO,
159 CODEC_TYPE_DATA,
160 };
161
162 /**
163 * Pixel format. Notes:
164 *
165 * PIX_FMT_RGBA32 is handled in an endian-specific manner. A RGBA
166 * color is put together as:
167 * (A << 24) | (R << 16) | (G << 8) | B
168 * This is stored as BGRA on little endian CPU architectures and ARGB on
169 * big endian CPUs.
170 *
171 * When the pixel format is palettized RGB (PIX_FMT_PAL8), the palettized
172 * image data is stored in AVFrame.data[0]. The palette is transported in
173 * AVFrame.data[1] and, is 1024 bytes long (256 4-byte entries) and is
174 * formatted the same as in PIX_FMT_RGBA32 described above (i.e., it is
175 * also endian-specific). Note also that the individual RGB palette
176 * components stored in AVFrame.data[1] should be in the range 0..255.
177 * This is important as many custom PAL8 video codecs that were designed
178 * to run on the IBM VGA graphics adapter use 6-bit palette components.
179 */
180 enum PixelFormat {
181 PIX_FMT_YUV420P, ///< Planar YUV 4:2:0 (1 Cr & Cb sample per 2x2 Y samples)
182 PIX_FMT_YUV422, ///< Packed pixel, Y0 Cb Y1 Cr
183 PIX_FMT_RGB24, ///< Packed pixel, 3 bytes per pixel, RGBRGB...
184 PIX_FMT_BGR24, ///< Packed pixel, 3 bytes per pixel, BGRBGR...
185 PIX_FMT_YUV422P, ///< Planar YUV 4:2:2 (1 Cr & Cb sample per 2x1 Y samples)
186 PIX_FMT_YUV444P, ///< Planar YUV 4:4:4 (1 Cr & Cb sample per 1x1 Y samples)
187 PIX_FMT_RGBA32, ///< Packed pixel, 4 bytes per pixel, BGRABGRA..., stored in cpu endianness
188 PIX_FMT_YUV410P, ///< Planar YUV 4:1:0 (1 Cr & Cb sample per 4x4 Y samples)
189 PIX_FMT_YUV411P, ///< Planar YUV 4:1:1 (1 Cr & Cb sample per 4x1 Y samples)
190 PIX_FMT_RGB565, ///< always stored in cpu endianness
191 PIX_FMT_RGB555, ///< always stored in cpu endianness, most significant bit to 1
192 PIX_FMT_GRAY8,
193 PIX_FMT_MONOWHITE, ///< 0 is white
194 PIX_FMT_MONOBLACK, ///< 0 is black
195 PIX_FMT_PAL8, ///< 8 bit with RGBA palette
196 PIX_FMT_YUVJ420P, ///< Planar YUV 4:2:0 full scale (jpeg)
197 PIX_FMT_YUVJ422P, ///< Planar YUV 4:2:2 full scale (jpeg)
198 PIX_FMT_YUVJ444P, ///< Planar YUV 4:4:4 full scale (jpeg)
199 PIX_FMT_XVMC_MPEG2_MC,///< XVideo Motion Acceleration via common packet passing(xvmc_render.h)
200 PIX_FMT_XVMC_MPEG2_IDCT,
201 PIX_FMT_UYVY422, ///< Packed pixel, Cb Y0 Cr Y1
202 PIX_FMT_NB,
203 };
204
205 /* currently unused, may be used if 24/32 bits samples ever supported */
206 enum SampleFormat {
207 SAMPLE_FMT_S16 = 0, ///< signed 16 bits
208 };
209
210 /* in bytes */
211 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 131072
212
213 /**
214 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
215 * this is mainly needed because some optimized bitstream readers read
216 * 32 or 64 bit at once and could read over the end<br>
217 * Note, if the first 23 bits of the additional bytes are not 0 then damaged
218 * MPEG bitstreams could cause overread and segfault
219 */
220 #define FF_INPUT_BUFFER_PADDING_SIZE 8
221
222 /* motion estimation type, EPZS by default */
223 enum Motion_Est_ID {
224 ME_ZERO = 1,
225 ME_FULL,
226 ME_LOG,
227 ME_PHODS,
228 ME_EPZS,
229 ME_X1
230 };
231
232 typedef struct RcOverride{
233 int start_frame;
234 int end_frame;
235 int qscale; // if this is 0 then quality_factor will be used instead
236 float quality_factor;
237 } RcOverride;
238
239 /* only for ME compatiblity with old apps */
240 extern int motion_estimation_method;
241
242 #define FF_MAX_B_FRAMES 8
243
244 /* encoding support
245 these flags can be passed in AVCodecContext.flags before initing
246 Note: note not everything is supported yet
247 */
248
249 #define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
250 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / Advanced prediction for H263
251 #define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
252 #define CODEC_FLAG_GMC 0x0020 ///< use GMC
253 #define CODEC_FLAG_MV0 0x0040 ///< always try a MB with MV=<0,0>
254 #define CODEC_FLAG_PART 0x0080 ///< use data partitioning
255 /* parent program gurantees that the input for b-frame containing streams is not written to
256 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
257 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
258 #define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
259 #define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
260 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
261 #define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
262 #define CODEC_FLAG_EMU_EDGE 0x4000///< dont draw edges
263 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
264 #define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
265 of only at frame boundaries */
266 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
267 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
268 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay
269 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
270 #define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
271 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
272 #define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
273 /* Fx : Flag for h263+ extra options */
274 #define CODEC_FLAG_H263P_AIC 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
275 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
276 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
277 #define CODEC_FLAG_CBP_RD 0x04000000 ///< use rate distortion optimization for cbp
278 #define CODEC_FLAG_QP_RD 0x08000000 ///< use rate distortion optimization for qp selectioon
279 #define CODEC_FLAG_H263P_AIV 0x00000008 ///< H263 Alternative inter vlc
280 #define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
281 #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
282 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
283 #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
284 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
285 #define CODEC_FLAG_CLOSED_GOP 0x80000000
286 /* Unsupported options :
287 * Syntax Arithmetic coding (SAC)
288 * Reference Picture Selection
289 * Independant Segment Decoding */
290 /* /Fx */
291 /* codec capabilities */
292
293 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
294 /**
295 * Codec uses get_buffer() for allocating buffers.
296 * direct rendering method 1
297 */
298 #define CODEC_CAP_DR1 0x0002
299 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
300 used */
301 #define CODEC_CAP_PARSE_ONLY 0x0004
302 #define CODEC_CAP_TRUNCATED 0x0008
303 /* codec can export data for HW decoding (XvMC) */
304 #define CODEC_CAP_HWACCEL 0x0010
305 /** codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data */
306 #define CODEC_CAP_DELAY 0x0020
307
308 //the following defines might change, so dont expect compatibility if u use them
309 #define MB_TYPE_INTRA4x4 0x0001
310 #define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
311 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME h264 specific
312 #define MB_TYPE_16x16 0x0008
313 #define MB_TYPE_16x8 0x0010
314 #define MB_TYPE_8x16 0x0020
315 #define MB_TYPE_8x8 0x0040
316 #define MB_TYPE_INTERLACED 0x0080
317 #define MB_TYPE_DIRECT2 0x0100 //FIXME
318 #define MB_TYPE_ACPRED 0x0200
319 #define MB_TYPE_GMC 0x0400
320 #define MB_TYPE_SKIP 0x0800
321 #define MB_TYPE_P0L0 0x1000
322 #define MB_TYPE_P1L0 0x2000
323 #define MB_TYPE_P0L1 0x4000
324 #define MB_TYPE_P1L1 0x8000
325 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
326 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
327 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
328 #define MB_TYPE_QUANT 0x00010000
329 #define MB_TYPE_CBP 0x00020000
330 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
331
332 /**
333 * Pan Scan area.
334 * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
335 */
336 typedef struct AVPanScan{
337 /**
338 * id.
339 * - encoding: set by user.
340 * - decoding: set by lavc
341 */
342 int id;
343
344 /**
345 * width and height in 1/16 pel
346 * - encoding: set by user.
347 * - decoding: set by lavc
348 */
349 int width;
350 int height;
351
352 /**
353 * position of the top left corner in 1/16 pel for up to 3 fields/frames.
354 * - encoding: set by user.
355 * - decoding: set by lavc
356 */
357 int16_t position[3][2];
358 }AVPanScan;
359
360 #define FF_COMMON_FRAME \
361 /**\
362 * pointer to the picture planes.\
363 * this might be different from the first allocated byte\
364 * - encoding: \
365 * - decoding: \
366 */\
367 uint8_t *data[4];\
368 int linesize[4];\
369 /**\
370 * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
371 * this isnt used by lavc unless the default get/release_buffer() is used\
372 * - encoding: \
373 * - decoding: \
374 */\
375 uint8_t *base[4];\
376 /**\
377 * 1 -> keyframe, 0-> not\
378 * - encoding: set by lavc\
379 * - decoding: set by lavc\
380 */\
381 int key_frame;\
382 \
383 /**\
384 * picture type of the frame, see ?_TYPE below.\
385 * - encoding: set by lavc for coded_picture (and set by user for input)\
386 * - decoding: set by lavc\
387 */\
388 int pict_type;\
389 \
390 /**\
391 * presentation timestamp in AV_TIME_BASE (=micro seconds currently) (time when frame should be shown to user)\
392 * if AV_NOPTS_VALUE then the frame_rate will be used as reference\
393 * - encoding: MUST be set by user\
394 * - decoding: set by lavc\
395 */\
396 int64_t pts;\
397 \
398 /**\
399 * picture number in bitstream order.\
400 * - encoding: set by\
401 * - decoding: set by lavc\
402 */\
403 int coded_picture_number;\
404 /**\
405 * picture number in display order.\
406 * - encoding: set by\
407 * - decoding: set by lavc\
408 */\
409 int display_picture_number;\
410 \
411 /**\
412 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
413 * - encoding: set by lavc for coded_picture (and set by user for input)\
414 * - decoding: set by lavc\
415 */\
416 int quality; \
417 \
418 /**\
419 * buffer age (1->was last buffer and dint change, 2->..., ...).\
420 * set to INT_MAX if the buffer has not been used yet \
421 * - encoding: unused\
422 * - decoding: MUST be set by get_buffer()\
423 */\
424 int age;\
425 \
426 /**\
427 * is this picture used as reference\
428 * - encoding: unused\
429 * - decoding: set by lavc (before get_buffer() call))\
430 */\
431 int reference;\
432 \
433 /**\
434 * QP table\
435 * - encoding: unused\
436 * - decoding: set by lavc\
437 */\
438 int8_t *qscale_table;\
439 /**\
440 * QP store stride\
441 * - encoding: unused\
442 * - decoding: set by lavc\
443 */\
444 int qstride;\
445 \
446 /**\
447 * mbskip_table[mb]>=1 if MB didnt change\
448 * stride= mb_width = (width+15)>>4\
449 * - encoding: unused\
450 * - decoding: set by lavc\
451 */\
452 uint8_t *mbskip_table;\
453 \
454 /**\
455 * Motion vector table\
456 * - encoding: set by user\
457 * - decoding: set by lavc\
458 */\
459 int16_t (*motion_val[2])[2];\
460 \
461 /**\
462 * Macroblock type table\
463 * mb_type_base + mb_width + 2\
464 * - encoding: set by user\
465 * - decoding: set by lavc\
466 */\
467 uint32_t *mb_type;\
468 \
469 /**\
470 * Macroblock size: (0->16x16, 1->8x8, 2-> 4x4, 3-> 2x2)\
471 * - encoding: unused\
472 * - decoding: set by lavc\
473 */\
474 uint8_t motion_subsample_log2;\
475 \
476 /**\
477 * for some private data of the user\
478 * - encoding: unused\
479 * - decoding: set by user\
480 */\
481 void *opaque;\
482 \
483 /**\
484 * error\
485 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
486 * - decoding: unused\
487 */\
488 uint64_t error[4];\
489 \
490 /**\
491 * type of the buffer (to keep track of who has to dealloc data[*])\
492 * - encoding: set by the one who allocs it\
493 * - decoding: set by the one who allocs it\
494 * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
495 */\
496 int type;\
497 \
498 /**\
499 * when decoding, this signal how much the picture must be delayed.\
500 * extra_delay = repeat_pict / (2*fps)\
501 * - encoding: unused\
502 * - decoding: set by lavc\
503 */\
504 int repeat_pict;\
505 \
506 /**\
507 * \
508 */\
509 int qscale_type;\
510 \
511 /**\
512 * The content of the picture is interlaced.\
513 * - encoding: set by user\
514 * - decoding: set by lavc (default 0)\
515 */\
516 int interlaced_frame;\
517 \
518 /**\
519 * if the content is interlaced, is top field displayed first.\
520 * - encoding: set by user\
521 * - decoding: set by lavc\
522 */\
523 int top_field_first;\
524 \
525 /**\
526 * Pan scan.\
527 * - encoding: set by user\
528 * - decoding: set by lavc\
529 */\
530 AVPanScan *pan_scan;\
531 \
532 /**\
533 * tell user application that palette has changed from previous frame.\
534 * - encoding: ??? (no palette-enabled encoder yet)\
535 * - decoding: set by lavc (default 0)\
536 */\
537 int palette_has_changed;\
538 \
539 /**\
540 * Codec suggestion on buffer type if != 0\
541 * - encoding: unused\
542 * - decoding: set by lavc (before get_buffer() call))\
543 */\
544 int buffer_hints;\
545 \
546 /**\
547 * DCT coeffitients\
548 * - encoding: unused\
549 * - decoding: set by lavc\
550 */\
551 short *dct_coeff;\
552 \
553 /**\
554 * Motion referece frame index\
555 * - encoding: set by user\
556 * - decoding: set by lavc\
557 */\
558 int8_t *ref_index[2];
559
560 #define FF_QSCALE_TYPE_MPEG1 0
561 #define FF_QSCALE_TYPE_MPEG2 1
562
563 #define FF_BUFFER_TYPE_INTERNAL 1
564 #define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
565 #define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewher else, dont dealloc image (data/base), all other tables are not shared
566 #define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, dont dealloc anything
567
568
569 #define FF_I_TYPE 1 // Intra
570 #define FF_P_TYPE 2 // Predicted
571 #define FF_B_TYPE 3 // Bi-dir predicted
572 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
573 #define FF_SI_TYPE 5
574 #define FF_SP_TYPE 6
575
576 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore)
577 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
578 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
579 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
580
581 /**
582 * Audio Video Frame.
583 */
584 typedef struct AVFrame {
585 FF_COMMON_FRAME
586 } AVFrame;
587
588 #define DEFAULT_FRAME_RATE_BASE 1001000
589
590 /**
591 * Used by av_log
592 */
593 typedef struct AVCLASS AVClass;
594 struct AVCLASS {
595 const char* class_name;
596 const char* (*item_name)(void*); /* actually passing a pointer to an AVCodecContext
597 or AVFormatContext, which begin with an AVClass.
598 Needed because av_log is in libavcodec and has no visibility
599 of AVIn/OutputFormat */
600 };
601
602 /**
603 * main external api structure.
604 */
605 typedef struct AVCodecContext {
606 /**
607 * Info on struct for av_log
608 * - set by avcodec_alloc_context
609 */
610 AVClass *av_class;
611 /**
612 * the average bitrate.
613 * - encoding: set by user. unused for constant quantizer encoding
614 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
615 */
616 int bit_rate;
617
618 /**
619 * number of bits the bitstream is allowed to diverge from the reference.
620 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
621 * - encoding: set by user. unused for constant quantizer encoding
622 * - decoding: unused
623 */
624 int bit_rate_tolerance;
625
626 /**
627 * CODEC_FLAG_*.
628 * - encoding: set by user.
629 * - decoding: set by user.
630 */
631 int flags;
632
633 /**
634 * some codecs needs additionnal format info. It is stored here
635 * - encoding: set by user.
636 * - decoding: set by lavc. (FIXME is this ok?)
637 */
638 int sub_id;
639
640 /**
641 * motion estimation algorithm used for video coding.
642 * - encoding: MUST be set by user.
643 * - decoding: unused
644 */
645 int me_method;
646
647 /**
648 * some codecs need / can use extra-data like huffman tables.
649 * mjpeg: huffman tables
650 * rv10: additional flags
651 * mpeg4: global headers (they can be in the bitstream or here)
652 * - encoding: set/allocated/freed by lavc.
653 * - decoding: set/allocated/freed by user.
654 */
655 void *extradata;
656 int extradata_size;
657
658 /* video only */
659 /**
660 * frames per sec multiplied by frame_rate_base.
661 * for variable fps this is the precission, so if the timestamps
662 * can be specified in msec precssion then this is 1000*frame_rate_base
663 * - encoding: MUST be set by user
664 * - decoding: set by lavc. 0 or the frame_rate if available
665 */
666 int frame_rate;
667
668 /**
669 * width / height.
670 * - encoding: MUST be set by user.
671 * - decoding: set by user if known, codec should override / dynamically change if needed
672 */
673 int width, height;
674
675 #define FF_ASPECT_EXTENDED 15
676
677 /**
678 * the number of pictures in a group of pitures, or 0 for intra_only.
679 * - encoding: set by user.
680 * - decoding: unused
681 */
682 int gop_size;
683
684 /**
685 * pixel format, see PIX_FMT_xxx.
686 * - encoding: FIXME: used by ffmpeg to decide whether an pix_fmt
687 * conversion is in order. This only works for
688 * codecs with one supported pix_fmt, we should
689 * do something for a generic case as well.
690 * - decoding: set by lavc.
691 */
692 enum PixelFormat pix_fmt;
693
694 /**
695 * Frame rate emulation. If not zero lower layer (i.e. format handler)
696 * has to read frames at native frame rate.
697 * - encoding: set by user.
698 * - decoding: unused.
699 */
700 int rate_emu;
701
702 /**
703 * if non NULL, 'draw_horiz_band' is called by the libavcodec
704 * decoder to draw an horizontal band. It improve cache usage. Not
705 * all codecs can do that. You must check the codec capabilities
706 * before
707 * - encoding: unused
708 * - decoding: set by user.
709 * @param height the height of the slice
710 * @param y the y position of the slice
711 * @param type 1->top field, 2->bottom field, 3->frame
712 * @param offset offset into the AVFrame.data from which the slice should be read
713 */
714 void (*draw_horiz_band)(struct AVCodecContext *s,
715 const AVFrame *src, int offset[4],
716 int y, int type, int height);
717
718 /* audio only */
719 int sample_rate; ///< samples per sec
720 int channels;
721 int sample_fmt; ///< sample format, currenly unused
722
723 /* the following data should not be initialized */
724 int frame_size; ///< in samples, initialized when calling 'init'
725 int frame_number; ///< audio or video frame number
726 int real_pict_num; ///< returns the real picture number of previous encoded frame
727
728 /**
729 * number of frames the decoded output will be delayed relative to
730 * the encoded input.
731 * - encoding: set by lavc.
732 * - decoding: unused
733 */
734 int delay;
735
736 /* - encoding parameters */
737 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
738 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
739
740 /**
741 * minimum quantizer.
742 * - encoding: set by user.
743 * - decoding: unused
744 */
745 int qmin;
746
747 /**
748 * maximum quantizer.
749 * - encoding: set by user.
750 * - decoding: unused
751 */
752 int qmax;
753
754 /**
755 * maximum quantizer difference etween frames.
756 * - encoding: set by user.
757 * - decoding: unused
758 */
759 int max_qdiff;
760
761 /**
762 * maximum number of b frames between non b frames.
763 * note: the output will be delayed by max_b_frames+1 relative to the input
764 * - encoding: set by user.
765 * - decoding: unused
766 */
767 int max_b_frames;
768
769 /**
770 * qscale factor between ip and b frames.
771 * - encoding: set by user.
772 * - decoding: unused
773 */
774 float b_quant_factor;
775
776 /** obsolete FIXME remove */
777 int rc_strategy;
778 int b_frame_strategy;
779
780 /**
781 * hurry up amount.
782 * - encoding: unused
783 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
784 */
785 int hurry_up;
786
787 struct AVCodec *codec;
788
789 void *priv_data;
790
791 /* unused, FIXME remove*/
792 int rtp_mode;
793
794 int rtp_payload_size; /* The size of the RTP payload, the coder will */
795 /* do it's best to deliver a chunk with size */
796 /* below rtp_payload_size, the chunk will start */
797 /* with a start code on some codecs like H.263 */
798 /* This doesn't take account of any particular */
799 /* headers inside the transmited RTP payload */
800
801
802 /* The RTP callcack: This function is called */
803 /* every time the encoder as a packet to send */
804 /* Depends on the encoder if the data starts */
805 /* with a Start Code (it should) H.263 does */
806 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int packet_number);
807
808 /* statistics, used for 2-pass encoding */
809 int mv_bits;
810 int header_bits;
811 int i_tex_bits;
812 int p_tex_bits;
813 int i_count;
814 int p_count;
815 int skip_count;
816 int misc_bits;
817
818 /**
819 * number of bits used for the previously encoded frame.
820 * - encoding: set by lavc
821 * - decoding: unused
822 */
823 int frame_bits;
824
825 /**
826 * private data of the user, can be used to carry app specific stuff.
827 * - encoding: set by user
828 * - decoding: set by user
829 */
830 void *opaque;
831
832 char codec_name[32];
833 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
834 enum CodecID codec_id; /* see CODEC_ID_xxx */
835
836 /**
837 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
838 * this is used to workaround some encoder bugs
839 * - encoding: set by user, if not then the default based on codec_id will be used
840 * - decoding: set by user, will be converted to upper case by lavc during init
841 */
842 unsigned int codec_tag;
843
844 /**
845 * workaround bugs in encoders which sometimes cannot be detected automatically.
846 * - encoding: unused
847 * - decoding: set by user
848 */
849 int workaround_bugs;
850 #define FF_BUG_AUTODETECT 1 ///< autodetection
851 #define FF_BUG_OLD_MSMPEG4 2
852 #define FF_BUG_XVID_ILACE 4
853 #define FF_BUG_UMP4 8
854 #define FF_BUG_NO_PADDING 16
855 #define FF_BUG_AMV 32
856 #define FF_BUG_AC_VLC 0 ///< will be removed, libavcodec can now handle these non compliant files by default
857 #define FF_BUG_QPEL_CHROMA 64
858 #define FF_BUG_STD_QPEL 128
859 #define FF_BUG_QPEL_CHROMA2 256
860 #define FF_BUG_DIRECT_BLOCKSIZE 512
861 #define FF_BUG_EDGE 1024
862 #define FF_BUG_HPEL_CHROMA 2048
863 #define FF_BUG_DC_CLIP 4096
864 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
865
866 /**
867 * luma single coeff elimination threshold.
868 * - encoding: set by user
869 * - decoding: unused
870 */
871 int luma_elim_threshold;
872
873 /**
874 * chroma single coeff elimination threshold.
875 * - encoding: set by user
876 * - decoding: unused
877 */
878 int chroma_elim_threshold;
879
880 /**
881 * strictly follow the std (MPEG4, ...).
882 * - encoding: set by user
883 * - decoding: unused
884 */
885 int strict_std_compliance;
886
887 /**
888 * qscale offset between ip and b frames.
889 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
890 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
891 * - encoding: set by user.
892 * - decoding: unused
893 */
894 float b_quant_offset;
895
896 /**
897 * error resilience higher values will detect more errors but may missdetect
898 * some more or less valid parts as errors.
899 * - encoding: unused
900 * - decoding: set by user
901 */
902 int error_resilience;
903 #define FF_ER_CAREFULL 1
904 #define FF_ER_COMPLIANT 2
905 #define FF_ER_AGGRESSIVE 3
906 #define FF_ER_VERY_AGGRESSIVE 4
907
908 /**
909 * called at the beginning of each frame to get a buffer for it.
910 * if pic.reference is set then the frame will be read later by lavc
911 * avcodec_align_dimensions() should be used to find the required width and
912 * height, as they normally need to be rounded up to the next multiple of 16
913 * - encoding: unused
914 * - decoding: set by lavc, user can override
915 */
916 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
917
918 /**
919 * called to release buffers which where allocated with get_buffer.
920 * a released buffer can be reused in get_buffer()
921 * pic.data[*] must be set to NULL
922 * - encoding: unused
923 * - decoding: set by lavc, user can override
924 */
925 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
926
927 /**
928 * if 1 the stream has a 1 frame delay during decoding.
929 * - encoding: set by lavc
930 * - decoding: set by lavc
931 */
932 int has_b_frames;
933
934 int block_align; ///< used by some WAV based audio codecs
935
936 int parse_only; /* - decoding only: if true, only parsing is done
937 (function avcodec_parse_frame()). The frame
938 data is returned. Only MPEG codecs support this now. */
939
940 /**
941 * 0-> h263 quant 1-> mpeg quant.
942 * - encoding: set by user.
943 * - decoding: unused
944 */
945 int mpeg_quant;
946
947 /**
948 * pass1 encoding statistics output buffer.
949 * - encoding: set by lavc
950 * - decoding: unused
951 */
952 char *stats_out;
953
954 /**
955 * pass2 encoding statistics input buffer.
956 * concatenated stuff from stats_out of pass1 should be placed here
957 * - encoding: allocated/set/freed by user
958 * - decoding: unused
959 */
960 char *stats_in;
961
962 /**
963 * ratecontrol qmin qmax limiting method.
964 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
965 * - encoding: set by user.
966 * - decoding: unused
967 */
968 float rc_qsquish;
969
970 float rc_qmod_amp;
971 int rc_qmod_freq;
972
973 /**
974 * ratecontrol override, see RcOverride.
975 * - encoding: allocated/set/freed by user.
976 * - decoding: unused
977 */
978 RcOverride *rc_override;
979 int rc_override_count;
980
981 /**
982 * rate control equation.
983 * - encoding: set by user
984 * - decoding: unused
985 */
986 char *rc_eq;
987
988 /**
989 * maximum bitrate.
990 * - encoding: set by user.
991 * - decoding: unused
992 */
993 int rc_max_rate;
994
995 /**
996 * minimum bitrate.
997 * - encoding: set by user.
998 * - decoding: unused
999 */
1000 int rc_min_rate;
1001
1002 /**
1003 * decoder bitstream buffer size.
1004 * - encoding: set by user.
1005 * - decoding: unused
1006 */
1007 int rc_buffer_size;
1008 float rc_buffer_aggressivity;
1009
1010 /**
1011 * qscale factor between p and i frames.
1012 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1013 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1014 * - encoding: set by user.
1015 * - decoding: unused
1016 */
1017 float i_quant_factor;
1018
1019 /**
1020 * qscale offset between p and i frames.
1021 * - encoding: set by user.
1022 * - decoding: unused
1023 */
1024 float i_quant_offset;
1025
1026 /**
1027 * initial complexity for pass1 ratecontrol.
1028 * - encoding: set by user.
1029 * - decoding: unused
1030 */
1031 float rc_initial_cplx;
1032
1033 /**
1034 * dct algorithm, see FF_DCT_* below.
1035 * - encoding: set by user
1036 * - decoding: unused
1037 */
1038 int dct_algo;
1039 #define FF_DCT_AUTO 0
1040 #define FF_DCT_FASTINT 1
1041 #define FF_DCT_INT 2
1042 #define FF_DCT_MMX 3
1043 #define FF_DCT_MLIB 4
1044 #define FF_DCT_ALTIVEC 5
1045 #define FF_DCT_FAAN 6
1046
1047 /**
1048 * luminance masking (0-> disabled).
1049 * - encoding: set by user
1050 * - decoding: unused
1051 */
1052 float lumi_masking;
1053
1054 /**
1055 * temporary complexity masking (0-> disabled).
1056 * - encoding: set by user
1057 * - decoding: unused
1058 */
1059 float temporal_cplx_masking;
1060
1061 /**
1062 * spatial complexity masking (0-> disabled).
1063 * - encoding: set by user
1064 * - decoding: unused
1065 */
1066 float spatial_cplx_masking;
1067
1068 /**
1069 * p block masking (0-> disabled).
1070 * - encoding: set by user
1071 * - decoding: unused
1072 */
1073 float p_masking;
1074
1075 /**
1076 * darkness masking (0-> disabled).
1077 * - encoding: set by user
1078 * - decoding: unused
1079 */
1080 float dark_masking;
1081
1082
1083 /* for binary compatibility */
1084 int unused;
1085
1086 /**
1087 * idct algorithm, see FF_IDCT_* below.
1088 * - encoding: set by user
1089 * - decoding: set by user
1090 */
1091 int idct_algo;
1092 #define FF_IDCT_AUTO 0
1093 #define FF_IDCT_INT 1
1094 #define FF_IDCT_SIMPLE 2
1095 #define FF_IDCT_SIMPLEMMX 3
1096 #define FF_IDCT_LIBMPEG2MMX 4
1097 #define FF_IDCT_PS2 5
1098 #define FF_IDCT_MLIB 6
1099 #define FF_IDCT_ARM 7
1100 #define FF_IDCT_ALTIVEC 8
1101 #define FF_IDCT_SH4 9
1102 #define FF_IDCT_SIMPLEARM 10
1103
1104 /**
1105 * slice count.
1106 * - encoding: set by lavc
1107 * - decoding: set by user (or 0)
1108 */
1109 int slice_count;
1110 /**
1111 * slice offsets in the frame in bytes.
1112 * - encoding: set/allocated by lavc
1113 * - decoding: set/allocated by user (or NULL)
1114 */
1115 int *slice_offset;
1116
1117 /**
1118 * error concealment flags.
1119 * - encoding: unused
1120 * - decoding: set by user
1121 */
1122 int error_concealment;
1123 #define FF_EC_GUESS_MVS 1
1124 #define FF_EC_DEBLOCK 2
1125
1126 /**
1127 * dsp_mask could be add used to disable unwanted CPU features
1128 * CPU features (i.e. MMX, SSE. ...)
1129 *
1130 * with FORCE flag you may instead enable given CPU features
1131 * (Dangerous: usable in case of misdetection, improper usage however will
1132 * result into program crash)
1133 */
1134 unsigned dsp_mask;
1135 #define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
1136 /* lower 16 bits - CPU features */
1137 #ifdef HAVE_MMX
1138 #define FF_MM_MMX 0x0001 /* standard MMX */
1139 #define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
1140 #define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
1141 #define FF_MM_SSE 0x0008 /* SSE functions */
1142 #define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
1143 #endif /* HAVE_MMX */
1144
1145 /**
1146 * bits per sample/pixel from the demuxer (needed for huffyuv).
1147 * - encoding: set by lavc
1148 * - decoding: set by user
1149 */
1150 int bits_per_sample;
1151
1152 /**
1153 * prediction method (needed for huffyuv).
1154 * - encoding: set by user
1155 * - decoding: unused
1156 */
1157 int prediction_method;
1158 #define FF_PRED_LEFT 0
1159 #define FF_PRED_PLANE 1
1160 #define FF_PRED_MEDIAN 2
1161
1162 /**
1163 * sample aspect ratio (0 if unknown).
1164 * numerator and denominator must be relative prime and smaller then 256 for some video standards
1165 * - encoding: set by user.
1166 * - decoding: set by lavc.
1167 */
1168 AVRational sample_aspect_ratio;
1169
1170 /**
1171 * the picture in the bitstream.
1172 * - encoding: set by lavc
1173 * - decoding: set by lavc
1174 */
1175 AVFrame *coded_frame;
1176
1177 /**
1178 * debug.
1179 * - encoding: set by user.
1180 * - decoding: set by user.
1181 */
1182 int debug;
1183 #define FF_DEBUG_PICT_INFO 1
1184 #define FF_DEBUG_RC 2
1185 #define FF_DEBUG_BITSTREAM 4
1186 #define FF_DEBUG_MB_TYPE 8
1187 #define FF_DEBUG_QP 16
1188 #define FF_DEBUG_MV 32
1189 #define FF_DEBUG_DCT_COEFF 0x00000040
1190 #define FF_DEBUG_SKIP 0x00000080
1191 #define FF_DEBUG_STARTCODE 0x00000100
1192 #define FF_DEBUG_PTS 0x00000200
1193 #define FF_DEBUG_ER 0x00000400
1194 #define FF_DEBUG_MMCO 0x00000800
1195 #define FF_DEBUG_BUGS 0x00001000
1196 #define FF_DEBUG_VIS_QP 0x00002000
1197 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1198
1199 /**
1200 * debug.
1201 * - encoding: set by user.
1202 * - decoding: set by user.
1203 */
1204 int debug_mv;
1205 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1206 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1207 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1208
1209 /**
1210 * error.
1211 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1212 * - decoding: unused
1213 */
1214 uint64_t error[4];
1215
1216 /**
1217 * minimum MB quantizer.
1218 * - encoding: set by user.
1219 * - decoding: unused
1220 */
1221 int mb_qmin;
1222
1223 /**
1224 * maximum MB quantizer.
1225 * - encoding: set by user.
1226 * - decoding: unused
1227 */
1228 int mb_qmax;
1229
1230 /**
1231 * motion estimation compare function.
1232 * - encoding: set by user.
1233 * - decoding: unused
1234 */
1235 int me_cmp;
1236 /**
1237 * subpixel motion estimation compare function.
1238 * - encoding: set by user.
1239 * - decoding: unused
1240 */
1241 int me_sub_cmp;
1242 /**
1243 * macroblock compare function (not supported yet).
1244 * - encoding: set by user.
1245 * - decoding: unused
1246 */
1247 int mb_cmp;
1248 /**
1249 * interlaced dct compare function
1250 * - encoding: set by user.
1251 * - decoding: unused
1252 */
1253 int ildct_cmp;
1254 #define FF_CMP_SAD 0
1255 #define FF_CMP_SSE 1
1256 #define FF_CMP_SATD 2
1257 #define FF_CMP_DCT 3
1258 #define FF_CMP_PSNR 4
1259 #define FF_CMP_BIT 5
1260 #define FF_CMP_RD 6
1261 #define FF_CMP_ZERO 7
1262 #define FF_CMP_VSAD 8
1263 #define FF_CMP_VSSE 9
1264 #define FF_CMP_NSSE 10
1265 #define FF_CMP_CHROMA 256
1266
1267 /**
1268 * ME diamond size & shape.
1269 * - encoding: set by user.
1270 * - decoding: unused
1271 */
1272 int dia_size;
1273
1274 /**
1275 * amount of previous MV predictors (2a+1 x 2a+1 square).
1276 * - encoding: set by user.
1277 * - decoding: unused
1278 */
1279 int last_predictor_count;
1280
1281 /**
1282 * pre pass for motion estimation.
1283 * - encoding: set by user.
1284 * - decoding: unused
1285 */
1286 int pre_me;
1287
1288 /**
1289 * motion estimation pre pass compare function.
1290 * - encoding: set by user.
1291 * - decoding: unused
1292 */
1293 int me_pre_cmp;
1294
1295 /**
1296 * ME pre pass diamond size & shape.
1297 * - encoding: set by user.
1298 * - decoding: unused
1299 */
1300 int pre_dia_size;
1301
1302 /**
1303 * subpel ME quality.
1304 * - encoding: set by user.
1305 * - decoding: unused
1306 */
1307 int me_subpel_quality;
1308
1309 /**
1310 * callback to negotiate the pixelFormat.
1311 * @param fmt is the list of formats which are supported by the codec,
1312 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1313 * the first is allways the native one
1314 * @return the choosen format
1315 * - encoding: unused
1316 * - decoding: set by user, if not set then the native format will always be choosen
1317 */
1318 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1319
1320 /**
1321 * DTG active format information (additionnal aspect ratio
1322 * information only used in DVB MPEG2 transport streams). 0 if
1323 * not set.
1324 *
1325 * - encoding: unused.
1326 * - decoding: set by decoder
1327 */
1328 int dtg_active_format;
1329 #define FF_DTG_AFD_SAME 8
1330 #define FF_DTG_AFD_4_3 9
1331 #define FF_DTG_AFD_16_9 10
1332 #define FF_DTG_AFD_14_9 11
1333 #define FF_DTG_AFD_4_3_SP_14_9 13
1334 #define FF_DTG_AFD_16_9_SP_14_9 14
1335 #define FF_DTG_AFD_SP_4_3 15
1336
1337 /**
1338 * Maximum motion estimation search range in subpel units.
1339 * if 0 then no limit
1340 *
1341 * - encoding: set by user.
1342 * - decoding: unused.
1343 */
1344 int me_range;
1345
1346 /**
1347 * frame_rate_base.
1348 * for variable fps this is 1
1349 * - encoding: set by user.
1350 * - decoding: set by lavc.
1351 * @todo move this after frame_rate
1352 */
1353
1354 int frame_rate_base;
1355 /**
1356 * intra quantizer bias.
1357 * - encoding: set by user.
1358 * - decoding: unused
1359 */
1360 int intra_quant_bias;
1361 #define FF_DEFAULT_QUANT_BIAS 999999
1362
1363 /**
1364 * inter quantizer bias.
1365 * - encoding: set by user.
1366 * - decoding: unused
1367 */
1368 int inter_quant_bias;
1369
1370 /**
1371 * color table ID.
1372 * - encoding: unused.
1373 * - decoding: which clrtable should be used for 8bit RGB images
1374 * table have to be stored somewhere FIXME
1375 */
1376 int color_table_id;
1377
1378 /**
1379 * internal_buffer count.
1380 * Dont touch, used by lavc default_get_buffer()
1381 */
1382 int internal_buffer_count;
1383
1384 /**
1385 * internal_buffers.
1386 * Dont touch, used by lavc default_get_buffer()
1387 */
1388 void *internal_buffer;
1389
1390 #define FF_LAMBDA_SHIFT 7
1391 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1392 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1393 #define FF_LAMBDA_MAX (256*128-1)
1394
1395 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1396 /**
1397 * global quality for codecs which cannot change it per frame.
1398 * this should be proportional to MPEG1/2/4 qscale.
1399 * - encoding: set by user.
1400 * - decoding: unused
1401 */
1402 int global_quality;
1403
1404 #define FF_CODER_TYPE_VLC 0
1405 #define FF_CODER_TYPE_AC 1
1406 /**
1407 * coder type
1408 * - encoding: set by user.
1409 * - decoding: unused
1410 */
1411 int coder_type;
1412
1413 /**
1414 * context model
1415 * - encoding: set by user.
1416 * - decoding: unused
1417 */
1418 int context_model;
1419
1420 /**
1421 * slice flags
1422 * - encoding: unused
1423 * - decoding: set by user.
1424 */
1425 int slice_flags;
1426 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1427 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1428 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1429
1430 /**
1431 * XVideo Motion Acceleration
1432 * - encoding: forbidden
1433 * - decoding: set by decoder
1434 */
1435 int xvmc_acceleration;
1436
1437 /**
1438 * macroblock decision mode
1439 * - encoding: set by user.
1440 * - decoding: unused
1441 */
1442 int mb_decision;
1443 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1444 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1445 #define FF_MB_DECISION_RD 2 ///< rate distoration
1446
1447 /**
1448 * custom intra quantization matrix
1449 * - encoding: set by user, can be NULL
1450 * - decoding: set by lavc
1451 */
1452 uint16_t *intra_matrix;
1453
1454 /**
1455 * custom inter quantization matrix
1456 * - encoding: set by user, can be NULL
1457 * - decoding: set by lavc
1458 */
1459 uint16_t *inter_matrix;
1460
1461 /**
1462 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1463 * this is used to workaround some encoder bugs
1464 * - encoding: unused
1465 * - decoding: set by user, will be converted to upper case by lavc during init
1466 */
1467 unsigned int stream_codec_tag;
1468
1469 /**
1470 * scene change detection threshold.
1471 * 0 is default, larger means fewer detected scene changes
1472 * - encoding: set by user.
1473 * - decoding: unused
1474 */
1475 int scenechange_threshold;
1476
1477 /**
1478 * minimum lagrange multipler
1479 * - encoding: set by user.
1480 * - decoding: unused
1481 */
1482 int lmin;
1483
1484 /**
1485 * maximum lagrange multipler
1486 * - encoding: set by user.
1487 * - decoding: unused
1488 */
1489 int lmax;
1490
1491 /**
1492 * Palette control structure
1493 * - encoding: ??? (no palette-enabled encoder yet)
1494 * - decoding: set by user.
1495 */
1496 struct AVPaletteControl *palctrl;
1497
1498 /**
1499 * noise reduction strength
1500 * - encoding: set by user.
1501 * - decoding: unused
1502 */
1503 int noise_reduction;
1504
1505 /**
1506 * called at the beginning of a frame to get cr buffer for it.
1507 * buffer type (size, hints) must be the same. lavc won't check it.
1508 * lavc will pass previous buffer in pic, function should return
1509 * same buffer or new buffer with old frame "painted" into it.
1510 * if pic.data[0] == NULL must behave like get_buffer().
1511 * - encoding: unused
1512 * - decoding: set by lavc, user can override
1513 */
1514 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1515
1516 /**
1517 * number of bits which should be loaded into the rc buffer before decoding starts
1518 * - encoding: set by user.
1519 * - decoding: unused
1520 */
1521 int rc_initial_buffer_occupancy;
1522
1523 /**
1524 *
1525 * - encoding: set by user.
1526 * - decoding: unused
1527 */
1528 int inter_threshold;
1529
1530 /**
1531 * CODEC_FLAG2_*.
1532 * - encoding: set by user.
1533 * - decoding: set by user.
1534 */
1535 int flags2;
1536
1537 /**
1538 * simulates errors in the bitstream to test error concealment.
1539 * - encoding: set by user.
1540 * - decoding: unused.
1541 */
1542 int error_rate;
1543
1544 /**
1545 * MP3 antialias algorithm, see FF_AA_* below.
1546 * - encoding: unused
1547 * - decoding: set by user
1548 */
1549 int antialias_algo;
1550 #define FF_AA_AUTO 0
1551 #define FF_AA_FASTINT 1 //not implemented yet
1552 #define FF_AA_INT 2
1553 #define FF_AA_FLOAT 3
1554 /**
1555 * Quantizer noise shaping.
1556 * - encoding: set by user
1557 * - decoding: unused
1558 */
1559 int quantizer_noise_shaping;
1560
1561 /**
1562 * Thread count.
1563 * is used to decide how many independant tasks should be passed to execute()
1564 * - encoding: set by user
1565 * - decoding: set by user
1566 */
1567 int thread_count;
1568
1569 /**
1570 * the codec may call this to execute several independant things. it will return only after
1571 * finishing all tasks, the user may replace this with some multithreaded implementation, the
1572 * default implementation will execute the parts serially
1573 * @param count the number of things to execute
1574 * - encoding: set by lavc, user can override
1575 * - decoding: set by lavc, user can override
1576 */
1577 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1578
1579 /**
1580 * Thread opaque.
1581 * can be used by execute() to store some per AVCodecContext stuff.
1582 * - encoding: set by execute()
1583 * - decoding: set by execute()
1584 */
1585 void *thread_opaque;
1586
1587 /**
1588 * Motion estimation threshold. under which no motion estimation is
1589 * performed, but instead the user specified motion vectors are used
1590 *
1591 * - encoding: set by user
1592 * - decoding: unused
1593 */
1594 int me_threshold;
1595
1596 /**
1597 * Macroblock threshold. under which the user specified macroblock types will be used
1598 * - encoding: set by user
1599 * - decoding: unused
1600 */
1601 int mb_threshold;
1602
1603 /**
1604 * precision of the intra dc coefficient - 8.
1605 * - encoding: set by user
1606 * - decoding: unused
1607 */
1608 int intra_dc_precision;
1609
1610 /**
1611 * noise vs. sse weight for the nsse comparsion function.
1612 * - encoding: set by user
1613 * - decoding: unused
1614 */
1615 int nsse_weight;
1616
1617 /**
1618 * number of macroblock rows at the top which are skiped.
1619 * - encoding: unused
1620 * - decoding: set by user
1621 */
1622 int skip_top;
1623
1624 /**
1625 * number of macroblock rows at the bottom which are skiped.
1626 * - encoding: unused
1627 * - decoding: set by user
1628 */
1629 int skip_bottom;
1630
1631 /**
1632 * profile
1633 * - encoding: set by user
1634 * - decoding: set by lavc
1635 */
1636 int profile;
1637 #define FF_PROFILE_UNKNOWN -99
1638
1639 /**
1640 * level
1641 * - encoding: set by user
1642 * - decoding: set by lavc
1643 */
1644 int level;
1645 #define FF_LEVEL_UNKNOWN -99
1646 } AVCodecContext;
1647
1648
1649 /**
1650 * AVOption.
1651 */
1652 typedef struct AVOption {
1653 /** options' name */
1654 const char *name; /* if name is NULL, it indicates a link to next */
1655 /** short English text help or const struct AVOption* subpointer */
1656 const char *help; // const struct AVOption* sub;
1657 /** offset to context structure where the parsed value should be stored */
1658 int offset;
1659 /** options' type */
1660 int type;
1661 #define FF_OPT_TYPE_BOOL 1 ///< boolean - true,1,on (or simply presence)
1662 #define FF_OPT_TYPE_DOUBLE 2 ///< double
1663 #define FF_OPT_TYPE_INT 3 ///< integer
1664 #define FF_OPT_TYPE_STRING 4 ///< string (finished with \0)
1665 #define FF_OPT_TYPE_MASK 0x1f ///< mask for types - upper bits are various flags
1666 //#define FF_OPT_TYPE_EXPERT 0x20 // flag for expert option
1667 #define FF_OPT_TYPE_FLAG (FF_OPT_TYPE_BOOL | 0x40)
1668 #define FF_OPT_TYPE_RCOVERRIDE (FF_OPT_TYPE_STRING | 0x80)
1669 /** min value (min == max -> no limits) */
1670 double min;
1671 /** maximum value for double/int */
1672 double max;
1673 /** default boo [0,1]l/double/int value */
1674 double defval;
1675 /**
1676 * default string value (with optional semicolon delimited extra option-list
1677 * i.e. option1;option2;option3
1678 * defval might select other then first argument as default
1679 */
1680 const char *defstr;
1681 #define FF_OPT_MAX_DEPTH 10
1682 } AVOption;
1683
1684 /**
1685 * Parse option(s) and sets fields in passed structure
1686 * @param strct structure where the parsed results will be written
1687 * @param list list with AVOptions
1688 * @param opts string with options for parsing
1689 */
1690 int avoption_parse(void* strct, const AVOption* list, const char* opts);
1691
1692
1693 /**
1694 * AVCodec.
1695 */
1696 typedef struct AVCodec {
1697 const char *name;
1698 enum CodecType type;
1699 int id;
1700 int priv_data_size;
1701 int (*init)(AVCodecContext *);
1702 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
1703 int (*close)(AVCodecContext *);
1704 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
1705 uint8_t *buf, int buf_size);
1706 int capabilities;
1707 const AVOption *options;
1708 struct AVCodec *next;
1709 void (*flush)(AVCodecContext *);
1710 const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
1711 const enum PixelFormat *pix_fmts; ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
1712 } AVCodec;
1713
1714 /**
1715 * four components are given, that's all.
1716 * the last component is alpha
1717 */
1718 typedef struct AVPicture {
1719 uint8_t *data[4];
1720 int linesize[4]; ///< number of bytes per line
1721 } AVPicture;
1722
1723 /**
1724 * AVPaletteControl
1725 * This structure defines a method for communicating palette changes
1726 * between and demuxer and a decoder.
1727 */
1728 #define AVPALETTE_SIZE 1024
1729 #define AVPALETTE_COUNT 256
1730 typedef struct AVPaletteControl {
1731
1732 /* demuxer sets this to 1 to indicate the palette has changed;
1733 * decoder resets to 0 */
1734 int palette_changed;
1735
1736 /* 4-byte ARGB palette entries, stored in native byte order; note that
1737 * the individual palette components should be on a 8-bit scale; if
1738 * the palette data comes from a IBM VGA native format, the component
1739 * data is probably 6 bits in size and needs to be scaled */
1740 unsigned int palette[AVPALETTE_COUNT];
1741
1742 } AVPaletteControl;
1743
1744 extern AVCodec ac3_encoder;
1745 extern AVCodec mp2_encoder;
1746 extern AVCodec mp3lame_encoder;
1747 extern AVCodec oggvorbis_encoder;
1748 extern AVCodec faac_encoder;
1749 extern AVCodec xvid_encoder;
1750 extern AVCodec mpeg1video_encoder;
1751 extern AVCodec mpeg2video_encoder;
1752 extern AVCodec h263_encoder;
1753 extern AVCodec h263p_encoder;
1754 extern AVCodec flv_encoder;
1755 extern AVCodec rv10_encoder;
1756 extern AVCodec rv20_encoder;
1757 extern AVCodec dvvideo_encoder;
1758 extern AVCodec mjpeg_encoder;
1759 extern AVCodec ljpeg_encoder;
1760 extern AVCodec mpeg4_encoder;
1761 extern AVCodec msmpeg4v1_encoder;
1762 extern AVCodec msmpeg4v2_encoder;
1763 extern AVCodec msmpeg4v3_encoder;
1764 extern AVCodec wmv1_encoder;
1765 extern AVCodec wmv2_encoder;
1766 extern AVCodec huffyuv_encoder;
1767 extern AVCodec h264_encoder;
1768 extern AVCodec asv1_encoder;
1769 extern AVCodec asv2_encoder;
1770 extern AVCodec vcr1_encoder;
1771 extern AVCodec ffv1_encoder;
1772 extern AVCodec snow_encoder;
1773 extern AVCodec mdec_encoder;
1774 extern AVCodec zlib_encoder;
1775 extern AVCodec sonic_encoder;
1776 extern AVCodec sonic_ls_encoder;
1777 extern AVCodec svq1_encoder;
1778
1779 extern AVCodec h263_decoder;
1780 extern AVCodec h261_decoder;
1781 extern AVCodec mpeg4_decoder;
1782 extern AVCodec msmpeg4v1_decoder;
1783 extern AVCodec msmpeg4v2_decoder;
1784 extern AVCodec msmpeg4v3_decoder;
1785 extern AVCodec wmv1_decoder;
1786 extern AVCodec wmv2_decoder;
1787 extern AVCodec mpeg1video_decoder;
1788 extern AVCodec mpeg2video_decoder;
1789 extern AVCodec mpegvideo_decoder;
1790 extern AVCodec mpeg_xvmc_decoder;
1791 extern AVCodec h263i_decoder;
1792 extern AVCodec flv_decoder;
1793 extern AVCodec rv10_decoder;
1794 extern AVCodec rv20_decoder;
1795 extern AVCodec svq1_decoder;
1796 extern AVCodec svq3_decoder;
1797 extern AVCodec dvvideo_decoder;
1798 extern AVCodec wmav1_decoder;
1799 extern AVCodec wmav2_decoder;
1800 extern AVCodec mjpeg_decoder;
1801 extern AVCodec mjpegb_decoder;
1802 extern AVCodec sp5x_decoder;
1803 extern AVCodec mp2_decoder;
1804 extern AVCodec mp3_decoder;
1805 extern AVCodec mace3_decoder;
1806 extern AVCodec mace6_decoder;
1807 extern AVCodec huffyuv_decoder;
1808 extern AVCodec oggvorbis_decoder;
1809 extern AVCodec cyuv_decoder;
1810 extern AVCodec h264_decoder;
1811 extern AVCodec indeo3_decoder;
1812 extern AVCodec vp3_decoder;
1813 extern AVCodec theora_decoder;
1814 extern AVCodec amr_nb_decoder;
1815 extern AVCodec amr_nb_encoder;
1816 extern AVCodec amr_wb_encoder;
1817 extern AVCodec amr_wb_decoder;
1818 extern AVCodec aac_decoder;
1819 extern AVCodec mpeg4aac_decoder;
1820 extern AVCodec asv1_decoder;
1821 extern AVCodec asv2_decoder;
1822 extern AVCodec vcr1_decoder;
1823 extern AVCodec cljr_decoder;
1824 extern AVCodec ffv1_decoder;
1825 extern AVCodec snow_decoder;
1826 extern AVCodec fourxm_decoder;
1827 extern AVCodec mdec_decoder;
1828 extern AVCodec roq_decoder;
1829 extern AVCodec interplay_video_decoder;
1830 extern AVCodec xan_wc3_decoder;
1831 extern AVCodec rpza_decoder;
1832 extern AVCodec cinepak_decoder;
1833 extern AVCodec msrle_decoder;
1834 extern AVCodec msvideo1_decoder;
1835 extern AVCodec vqa_decoder;
1836 extern AVCodec idcin_decoder;
1837 extern AVCodec eightbps_decoder;
1838 extern AVCodec smc_decoder;
1839 extern AVCodec flic_decoder;
1840 extern AVCodec vmdvideo_decoder;
1841 extern AVCodec vmdaudio_decoder;
1842 extern AVCodec truemotion1_decoder;
1843 extern AVCodec mszh_decoder;
1844 extern AVCodec zlib_decoder;
1845 extern AVCodec ra_144_decoder;
1846 extern AVCodec ra_288_decoder;
1847 extern AVCodec roq_dpcm_decoder;
1848 extern AVCodec interplay_dpcm_decoder;
1849 extern AVCodec xan_dpcm_decoder;
1850 extern AVCodec sonic_decoder;
1851 extern AVCodec qtrle_decoder;
1852 extern AVCodec flac_decoder;
1853 extern AVCodec tscc_decoder;
1854
1855 /* pcm codecs */
1856 #define PCM_CODEC(id, name) \
1857 extern AVCodec name ## _decoder; \
1858 extern AVCodec name ## _encoder
1859
1860 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
1861 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
1862 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
1863 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
1864 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
1865 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
1866 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
1867 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
1868
1869 /* adpcm codecs */
1870
1871 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
1872 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
1873 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
1874 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
1875 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
1876 PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
1877 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
1878 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
1879 PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
1880 PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
1881 PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
1882 PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
1883
1884 #undef PCM_CODEC
1885
1886 /* dummy raw video codec */
1887 extern AVCodec rawvideo_encoder;
1888 extern AVCodec rawvideo_decoder;
1889
1890 /* the following codecs use external GPL libs */
1891 extern AVCodec ac3_decoder;
1892 extern AVCodec dts_decoder;
1893
1894 /* resample.c */
1895
1896 struct ReSampleContext;
1897 struct AVResampleContext;
1898
1899 typedef struct ReSampleContext ReSampleContext;
1900
1901 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
1902 int output_rate, int input_rate);
1903 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
1904 void audio_resample_close(ReSampleContext *s);
1905
1906 struct AVResampleContext *av_resample_init(int out_rate, int in_rate);
1907 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
1908 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
1909 void av_resample_close(struct AVResampleContext *c);
1910
1911 /* YUV420 format is assumed ! */
1912
1913 struct ImgReSampleContext;
1914
1915 typedef struct ImgReSampleContext ImgReSampleContext;
1916
1917 ImgReSampleContext *img_resample_init(int output_width, int output_height,
1918 int input_width, int input_height);
1919
1920 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
1921 int iwidth, int iheight,
1922 int topBand, int bottomBand,
1923 int leftBand, int rightBand,
1924 int padtop, int padbottom,
1925 int padleft, int padright);
1926
1927
1928 void img_resample(ImgReSampleContext *s,
1929 AVPicture *output, const AVPicture *input);
1930
1931 void img_resample_close(ImgReSampleContext *s);
1932
1933 /**
1934 * Allocate memory for a picture. Call avpicture_free to free it.
1935 *
1936 * @param picture the picture to be filled in.
1937 * @param pix_fmt the format of the picture.
1938 * @param width the width of the picture.
1939 * @param height the height of the picture.
1940 * @return 0 if successful, -1 if not.
1941 */
1942 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
1943
1944 /* Free a picture previously allocated by avpicture_alloc. */
1945 void avpicture_free(AVPicture *picture);
1946
1947 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
1948 int pix_fmt, int width, int height);
1949 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
1950 unsigned char *dest, int dest_size);
1951 int avpicture_get_size(int pix_fmt, int width, int height);
1952 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
1953 const char *avcodec_get_pix_fmt_name(int pix_fmt);
1954 enum PixelFormat avcodec_get_pix_fmt(const char* name);
1955
1956 #define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
1957 #define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
1958 #define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
1959 #define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
1960 #define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
1961 #define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
1962
1963 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
1964 int has_alpha);
1965 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
1966 int has_alpha, int *loss_ptr);
1967
1968 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
1969 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
1970 int img_get_alpha_info(const AVPicture *src,
1971 int pix_fmt, int width, int height);
1972
1973 /* convert among pixel formats */
1974 int img_convert(AVPicture *dst, int dst_pix_fmt,
1975 const AVPicture *src, int pix_fmt,
1976 int width, int height);
1977
1978 /* deinterlace a picture */
1979 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
1980 int pix_fmt, int width, int height);
1981
1982 /* external high level API */
1983
1984 extern AVCodec *first_avcodec;
1985
1986 /* returns LIBAVCODEC_VERSION_INT constant */
1987 unsigned avcodec_version(void);
1988 /* returns LIBAVCODEC_BUILD constant */
1989 unsigned avcodec_build(void);
1990 void avcodec_init(void);
1991
1992 void register_avcodec(AVCodec *format);
1993 AVCodec *avcodec_find_encoder(enum CodecID id);
1994 AVCodec *avcodec_find_encoder_by_name(const char *name);
1995 AVCodec *avcodec_find_decoder(enum CodecID id);
1996 AVCodec *avcodec_find_decoder_by_name(const char *name);
1997 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
1998
1999 void avcodec_get_context_defaults(AVCodecContext *s);
2000 AVCodecContext *avcodec_alloc_context(void);
2001 void avcodec_get_frame_defaults(AVFrame *pic);
2002 AVFrame *avcodec_alloc_frame(void);
2003
2004 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2005 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2006 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2007 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2008 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2009
2010 int avcodec_thread_init(AVCodecContext *s, int thread_count);
2011 void avcodec_thread_free(AVCodecContext *s);
2012 int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2013 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2014 //FIXME func typedef
2015
2016 /**
2017 * opens / inits the AVCodecContext.
2018 * not thread save!
2019 */
2020 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2021
2022 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2023 int *frame_size_ptr,
2024 uint8_t *buf, int buf_size);
2025 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2026 int *got_picture_ptr,
2027 uint8_t *buf, int buf_size);
2028 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2029 int *data_size_ptr,
2030 uint8_t *buf, int buf_size);
2031 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2032 const short *samples);
2033 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2034 const AVFrame *pict);
2035
2036 int avcodec_close(AVCodecContext *avctx);
2037
2038 void avcodec_register_all(void);
2039
2040 void avcodec_flush_buffers(AVCodecContext *avctx);
2041
2042 /* misc usefull functions */
2043
2044 /**
2045 * returns a single letter to describe the picture type
2046 */
2047 char av_get_pict_type_char(int pict_type);
2048
2049 /**
2050 * reduce a fraction.
2051 * this is usefull for framerate calculations
2052 * @param max the maximum allowed for dst_nom & dst_den
2053 * @return 1 if exact, 0 otherwise
2054 */
2055 int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max);
2056
2057 /**
2058 * rescale a 64bit integer.
2059 * a simple a*b/c isnt possible as it can overflow
2060 */
2061 int64_t av_rescale(int64_t a, int64_t b, int64_t c);
2062
2063
2064 /**
2065 * Interface for 0.5.0 version
2066 *
2067 * do not even think about it's usage for this moment
2068 */
2069
2070 typedef struct {
2071 /// compressed size used from given memory buffer
2072 int size;
2073 /// I/P/B frame type
2074 int frame_type;
2075 } avc_enc_result_t;
2076
2077 /**
2078 * Commands
2079 * order can't be changed - once it was defined
2080 */
2081 typedef enum {
2082 // general commands
2083 AVC_OPEN_BY_NAME = 0xACA000,
2084 AVC_OPEN_BY_CODEC_ID,
2085 AVC_OPEN_BY_FOURCC,
2086 AVC_CLOSE,
2087
2088 AVC_FLUSH,
2089 // pin - struct { uint8_t* src, uint_t src_size }
2090 // pout - struct { AVPicture* img, consumed_bytes,
2091 AVC_DECODE,
2092 // pin - struct { AVPicture* img, uint8_t* dest, uint_t dest_size }
2093 // pout - uint_t used_from_dest_size
2094 AVC_ENCODE,
2095
2096 // query/get video commands
2097 AVC_GET_VERSION = 0xACB000,
2098 AVC_GET_WIDTH,
2099 AVC_GET_HEIGHT,
2100 AVC_GET_DELAY,
2101 AVC_GET_QUANT_TABLE,
2102 // ...
2103
2104 // query/get audio commands
2105 AVC_GET_FRAME_SIZE = 0xABC000,
2106
2107 // maybe define some simple structure which
2108 // might be passed to the user - but they can't
2109 // contain any codec specific parts and these
2110 // calls are usualy necessary only few times
2111
2112 // set video commands
2113 AVC_SET_WIDTH = 0xACD000,
2114 AVC_SET_HEIGHT,
2115
2116 // set video encoding commands
2117 AVC_SET_FRAME_RATE = 0xACD800,
2118 AVC_SET_QUALITY,
2119 AVC_SET_HURRY_UP,
2120
2121 // set audio commands
2122 AVC_SET_SAMPLE_RATE = 0xACE000,
2123 AVC_SET_CHANNELS,
2124
2125 } avc_cmd_t;
2126
2127 /**
2128 * \param handle allocated private structure by libavcodec
2129 * for initialization pass NULL - will be returned pout
2130 * user is supposed to know nothing about its structure
2131 * \param cmd type of operation to be performed
2132 * \param pint input parameter
2133 * \param pout output parameter
2134 *
2135 * \returns command status - eventually for query command it might return
2136 * integer resulting value
2137 */
2138 int avcodec(void* handle, avc_cmd_t cmd, void* pin, void* pout);
2139
2140 /* frame parsing */
2141 typedef struct AVCodecParserContext {
2142 void *priv_data;
2143 struct AVCodecParser *parser;
2144 int64_t frame_offset; /* offset of the current frame */
2145 int64_t cur_offset; /* current offset
2146 (incremented by each av_parser_parse()) */
2147 int64_t last_frame_offset; /* offset of the last frame */
2148 /* video info */
2149 int pict_type; /* XXX: put it back in AVCodecContext */
2150 int repeat_pict; /* XXX: put it back in AVCodecContext */
2151 int64_t pts; /* pts of the current frame */
2152 int64_t dts; /* dts of the current frame */
2153
2154 /* private data */
2155 int64_t last_pts;
2156 int64_t last_dts;
2157 int fetch_timestamp;
2158
2159 #define AV_PARSER_PTS_NB 4
2160 int cur_frame_start_index;
2161 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2162 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2163 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2164 } AVCodecParserContext;
2165
2166 typedef struct AVCodecParser {
2167 int codec_ids[3]; /* several codec IDs are permitted */
2168 int priv_data_size;
2169 int (*parser_init)(AVCodecParserContext *s);
2170 int (*parser_parse)(AVCodecParserContext *s,
2171 AVCodecContext *avctx,
2172 uint8_t **poutbuf, int *poutbuf_size,
2173 const uint8_t *buf, int buf_size);
2174 void (*parser_close)(AVCodecParserContext *s);
2175 struct AVCodecParser *next;
2176 } AVCodecParser;
2177
2178 extern AVCodecParser *av_first_parser;
2179
2180 void av_register_codec_parser(AVCodecParser *parser);
2181 AVCodecParserContext *av_parser_init(int codec_id);
2182 int av_parser_parse(AVCodecParserContext *s,
2183 AVCodecContext *avctx,
2184 uint8_t **poutbuf, int *poutbuf_size,
2185 const uint8_t *buf, int buf_size,
2186 int64_t pts, int64_t dts);
2187 void av_parser_close(AVCodecParserContext *s);
2188
2189 extern AVCodecParser mpegvideo_parser;
2190 extern AVCodecParser mpeg4video_parser;
2191 extern AVCodecParser h261_parser;
2192 extern AVCodecParser h263_parser;
2193 extern AVCodecParser h264_parser;
2194 extern AVCodecParser mpegaudio_parser;
2195 extern AVCodecParser ac3_parser;
2196
2197 /* memory */
2198 void *av_malloc(unsigned int size);
2199 void *av_mallocz(unsigned int size);
2200 void *av_realloc(void *ptr, unsigned int size);
2201 void av_free(void *ptr);
2202 char *av_strdup(const char *s);
2203 void av_freep(void *ptr);
2204 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2205 /* for static data only */
2206 /* call av_free_static to release all staticaly allocated tables */
2207 void av_free_static(void);
2208 void *av_mallocz_static(unsigned int size);
2209
2210 /* add by bero : in adx.c */
2211 int is_adx(const unsigned char *buf,size_t bufsize);
2212
2213 void img_copy(AVPicture *dst, const AVPicture *src,
2214 int pix_fmt, int width, int height);
2215
2216 /* av_log API */
2217
2218 #include <stdarg.h>
2219
2220 #define AV_LOG_QUIET -1
2221 #define AV_LOG_ERROR 0
2222 #define AV_LOG_INFO 1
2223 #define AV_LOG_DEBUG 2
2224
2225 #ifdef __GNUC__
2226 extern void av_log(void*, int level, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 3, 4)));
2227 #else
2228 extern void av_log(void*, int level, const char *fmt, ...);
2229 #endif
2230
2231 extern void av_vlog(void*, int level, const char *fmt, va_list);
2232 extern int av_log_get_level(void);
2233 extern void av_log_set_level(int);
2234 extern void av_log_set_callback(void (*)(void*, int, const char*, va_list));
2235
2236 /* endian macros */
2237 #if !defined(BE_16) || !defined(BE_32) || !defined(LE_16) || !defined(LE_32)
2238 #define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
2239 #define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
2240 (((uint8_t*)(x))[1] << 16) | \
2241 (((uint8_t*)(x))[2] << 8) | \
2242 ((uint8_t*)(x))[3])
2243 #define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
2244 #define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \
2245 (((uint8_t*)(x))[2] << 16) | \
2246 (((uint8_t*)(x))[1] << 8) | \
2247 ((uint8_t*)(x))[0])
2248 #endif
2249
2250 #ifdef __cplusplus
2251 }
2252 #endif
2253
2254 #endif /* AVCODEC_H */