libdts support by (Benjamin Zores <ben at geexbox dot org>)
[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 4718
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_QTRLE,
101
102 /* various pcm "codecs" */
103 CODEC_ID_PCM_S16LE,
104 CODEC_ID_PCM_S16BE,
105 CODEC_ID_PCM_U16LE,
106 CODEC_ID_PCM_U16BE,
107 CODEC_ID_PCM_S8,
108 CODEC_ID_PCM_U8,
109 CODEC_ID_PCM_MULAW,
110 CODEC_ID_PCM_ALAW,
111
112 /* various adpcm codecs */
113 CODEC_ID_ADPCM_IMA_QT,
114 CODEC_ID_ADPCM_IMA_WAV,
115 CODEC_ID_ADPCM_IMA_DK3,
116 CODEC_ID_ADPCM_IMA_DK4,
117 CODEC_ID_ADPCM_IMA_WS,
118 CODEC_ID_ADPCM_IMA_SMJPEG,
119 CODEC_ID_ADPCM_MS,
120 CODEC_ID_ADPCM_4XM,
121 CODEC_ID_ADPCM_XA,
122 CODEC_ID_ADPCM_ADX,
123 CODEC_ID_ADPCM_EA,
124 CODEC_ID_ADPCM_G726,
125
126 /* AMR */
127 CODEC_ID_AMR_NB,
128 CODEC_ID_AMR_WB,
129
130 /* RealAudio codecs*/
131 CODEC_ID_RA_144,
132 CODEC_ID_RA_288,
133
134 /* various DPCM codecs */
135 CODEC_ID_ROQ_DPCM,
136 CODEC_ID_INTERPLAY_DPCM,
137 CODEC_ID_XAN_DPCM,
138
139 CODEC_ID_FLAC,
140
141 CODEC_ID_MPEG2TS, /* _FAKE_ codec to indicate a raw MPEG2 transport
142 stream (only used by libavformat) */
143
144 CODEC_ID_DTS,
145 };
146
147 /* CODEC_ID_MP3LAME is absolete */
148 #define CODEC_ID_MP3LAME CODEC_ID_MP3
149
150 enum CodecType {
151 CODEC_TYPE_UNKNOWN = -1,
152 CODEC_TYPE_VIDEO,
153 CODEC_TYPE_AUDIO,
154 CODEC_TYPE_DATA,
155 };
156
157 /**
158 * Pixel format. Notes:
159 *
160 * PIX_FMT_RGBA32 is handled in an endian-specific manner. A RGBA
161 * color is put together as:
162 * (A << 24) | (R << 16) | (G << 8) | B
163 * This is stored as BGRA on little endian CPU architectures and ARGB on
164 * big endian CPUs.
165 *
166 * When the pixel format is palettized RGB (PIX_FMT_PAL8), the palettized
167 * image data is stored in AVFrame.data[0]. The palette is transported in
168 * AVFrame.data[1] and, is 1024 bytes long (256 4-byte entries) and is
169 * formatted the same as in PIX_FMT_RGBA32 described above (i.e., it is
170 * also endian-specific). Note also that the individual RGB palette
171 * components stored in AVFrame.data[1] should be in the range 0..255.
172 * This is important as many custom PAL8 video codecs that were designed
173 * to run on the IBM VGA graphics adapter use 6-bit palette components.
174 */
175 enum PixelFormat {
176 PIX_FMT_YUV420P, ///< Planar YUV 4:2:0 (1 Cr & Cb sample per 2x2 Y samples)
177 PIX_FMT_YUV422,
178 PIX_FMT_RGB24, ///< Packed pixel, 3 bytes per pixel, RGBRGB...
179 PIX_FMT_BGR24, ///< Packed pixel, 3 bytes per pixel, BGRBGR...
180 PIX_FMT_YUV422P, ///< Planar YUV 4:2:2 (1 Cr & Cb sample per 2x1 Y samples)
181 PIX_FMT_YUV444P, ///< Planar YUV 4:4:4 (1 Cr & Cb sample per 1x1 Y samples)
182 PIX_FMT_RGBA32, ///< Packed pixel, 4 bytes per pixel, BGRABGRA..., stored in cpu endianness
183 PIX_FMT_YUV410P, ///< Planar YUV 4:1:0 (1 Cr & Cb sample per 4x4 Y samples)
184 PIX_FMT_YUV411P, ///< Planar YUV 4:1:1 (1 Cr & Cb sample per 4x1 Y samples)
185 PIX_FMT_RGB565, ///< always stored in cpu endianness
186 PIX_FMT_RGB555, ///< always stored in cpu endianness, most significant bit to 1
187 PIX_FMT_GRAY8,
188 PIX_FMT_MONOWHITE, ///< 0 is white
189 PIX_FMT_MONOBLACK, ///< 0 is black
190 PIX_FMT_PAL8, ///< 8 bit with RGBA palette
191 PIX_FMT_YUVJ420P, ///< Planar YUV 4:2:0 full scale (jpeg)
192 PIX_FMT_YUVJ422P, ///< Planar YUV 4:2:2 full scale (jpeg)
193 PIX_FMT_YUVJ444P, ///< Planar YUV 4:4:4 full scale (jpeg)
194 PIX_FMT_XVMC_MPEG2_MC,///< XVideo Motion Acceleration via common packet passing(xvmc_render.h)
195 PIX_FMT_XVMC_MPEG2_IDCT,
196 PIX_FMT_NB,
197 };
198
199 /* currently unused, may be used if 24/32 bits samples ever supported */
200 enum SampleFormat {
201 SAMPLE_FMT_S16 = 0, ///< signed 16 bits
202 };
203
204 /* in bytes */
205 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 131072
206
207 /**
208 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
209 * this is mainly needed because some optimized bitstream readers read
210 * 32 or 64 bit at once and could read over the end<br>
211 * Note, if the first 23 bits of the additional bytes are not 0 then damaged
212 * MPEG bitstreams could cause overread and segfault
213 */
214 #define FF_INPUT_BUFFER_PADDING_SIZE 8
215
216 /* motion estimation type, EPZS by default */
217 enum Motion_Est_ID {
218 ME_ZERO = 1,
219 ME_FULL,
220 ME_LOG,
221 ME_PHODS,
222 ME_EPZS,
223 ME_X1
224 };
225
226 typedef struct RcOverride{
227 int start_frame;
228 int end_frame;
229 int qscale; // if this is 0 then quality_factor will be used instead
230 float quality_factor;
231 } RcOverride;
232
233 /* only for ME compatiblity with old apps */
234 extern int motion_estimation_method;
235
236 #define FF_MAX_B_FRAMES 8
237
238 /* encoding support
239 these flags can be passed in AVCodecContext.flags before initing
240 Note: note not everything is supported yet
241 */
242
243 #define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
244 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / Advanced prediction for H263
245 #define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
246 #define CODEC_FLAG_GMC 0x0020 ///< use GMC
247 #define CODEC_FLAG_MV0 0x0040 ///< always try a MB with MV=<0,0>
248 #define CODEC_FLAG_PART 0x0080 ///< use data partitioning
249 /* parent program gurantees that the input for b-frame containing streams is not written to
250 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
251 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
252 #define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
253 #define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
254 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
255 #define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
256 #define CODEC_FLAG_EMU_EDGE 0x4000///< dont draw edges
257 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
258 #define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
259 of only at frame boundaries */
260 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
261 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
262 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay
263 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
264 #define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
265 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
266 #define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
267 /* Fx : Flag for h263+ extra options */
268 #define CODEC_FLAG_H263P_AIC 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
269 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
270 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
271 #define CODEC_FLAG_CBP_RD 0x04000000 ///< use rate distortion optimization for cbp
272 #define CODEC_FLAG_QP_RD 0x08000000 ///< use rate distortion optimization for qp selectioon
273 #define CODEC_FLAG_H263P_AIV 0x00000008 ///< H263 Alternative inter vlc
274 #define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
275 #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
276 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
277 #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
278 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
279 #define CODEC_FLAG_CLOSED_GOP 0x80000000
280 /* Unsupported options :
281 * Syntax Arithmetic coding (SAC)
282 * Reference Picture Selection
283 * Independant Segment Decoding */
284 /* /Fx */
285 /* codec capabilities */
286
287 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
288 /**
289 * Codec uses get_buffer() for allocating buffers.
290 * direct rendering method 1
291 */
292 #define CODEC_CAP_DR1 0x0002
293 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
294 used */
295 #define CODEC_CAP_PARSE_ONLY 0x0004
296 #define CODEC_CAP_TRUNCATED 0x0008
297 /* codec can export data for HW decoding (XvMC) */
298 #define CODEC_CAP_HWACCEL 0x0010
299 /** codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data */
300 #define CODEC_CAP_DELAY 0x0020
301
302 //the following defines might change, so dont expect compatibility if u use them
303 #define MB_TYPE_INTRA4x4 0x0001
304 #define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
305 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME h264 specific
306 #define MB_TYPE_16x16 0x0008
307 #define MB_TYPE_16x8 0x0010
308 #define MB_TYPE_8x16 0x0020
309 #define MB_TYPE_8x8 0x0040
310 #define MB_TYPE_INTERLACED 0x0080
311 #define MB_TYPE_DIRECT2 0x0100 //FIXME
312 #define MB_TYPE_ACPRED 0x0200
313 #define MB_TYPE_GMC 0x0400
314 #define MB_TYPE_SKIP 0x0800
315 #define MB_TYPE_P0L0 0x1000
316 #define MB_TYPE_P1L0 0x2000
317 #define MB_TYPE_P0L1 0x4000
318 #define MB_TYPE_P1L1 0x8000
319 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
320 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
321 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
322 #define MB_TYPE_QUANT 0x00010000
323 #define MB_TYPE_CBP 0x00020000
324 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
325
326 /**
327 * Pan Scan area.
328 * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
329 */
330 typedef struct AVPanScan{
331 /**
332 * id.
333 * - encoding: set by user.
334 * - decoding: set by lavc
335 */
336 int id;
337
338 /**
339 * width and height in 1/16 pel
340 * - encoding: set by user.
341 * - decoding: set by lavc
342 */
343 int width;
344 int height;
345
346 /**
347 * position of the top left corner in 1/16 pel for up to 3 fields/frames.
348 * - encoding: set by user.
349 * - decoding: set by lavc
350 */
351 int16_t position[3][2];
352 }AVPanScan;
353
354 #define FF_COMMON_FRAME \
355 /**\
356 * pointer to the picture planes.\
357 * this might be different from the first allocated byte\
358 * - encoding: \
359 * - decoding: \
360 */\
361 uint8_t *data[4];\
362 int linesize[4];\
363 /**\
364 * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
365 * this isnt used by lavc unless the default get/release_buffer() is used\
366 * - encoding: \
367 * - decoding: \
368 */\
369 uint8_t *base[4];\
370 /**\
371 * 1 -> keyframe, 0-> not\
372 * - encoding: set by lavc\
373 * - decoding: set by lavc\
374 */\
375 int key_frame;\
376 \
377 /**\
378 * picture type of the frame, see ?_TYPE below.\
379 * - encoding: set by lavc for coded_picture (and set by user for input)\
380 * - decoding: set by lavc\
381 */\
382 int pict_type;\
383 \
384 /**\
385 * presentation timestamp in AV_TIME_BASE (=micro seconds currently) (time when frame should be shown to user)\
386 * if AV_NOPTS_VALUE then the frame_rate will be used as reference\
387 * - encoding: MUST be set by user\
388 * - decoding: set by lavc\
389 */\
390 int64_t pts;\
391 \
392 /**\
393 * picture number in bitstream order.\
394 * - encoding: set by\
395 * - decoding: set by lavc\
396 */\
397 int coded_picture_number;\
398 /**\
399 * picture number in display order.\
400 * - encoding: set by\
401 * - decoding: set by lavc\
402 */\
403 int display_picture_number;\
404 \
405 /**\
406 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
407 * - encoding: set by lavc for coded_picture (and set by user for input)\
408 * - decoding: set by lavc\
409 */\
410 int quality; \
411 \
412 /**\
413 * buffer age (1->was last buffer and dint change, 2->..., ...).\
414 * set to INT_MAX if the buffer has not been used yet \
415 * - encoding: unused\
416 * - decoding: MUST be set by get_buffer()\
417 */\
418 int age;\
419 \
420 /**\
421 * is this picture used as reference\
422 * - encoding: unused\
423 * - decoding: set by lavc (before get_buffer() call))\
424 */\
425 int reference;\
426 \
427 /**\
428 * QP table\
429 * - encoding: unused\
430 * - decoding: set by lavc\
431 */\
432 int8_t *qscale_table;\
433 /**\
434 * QP store stride\
435 * - encoding: unused\
436 * - decoding: set by lavc\
437 */\
438 int qstride;\
439 \
440 /**\
441 * mbskip_table[mb]>=1 if MB didnt change\
442 * stride= mb_width = (width+15)>>4\
443 * - encoding: unused\
444 * - decoding: set by lavc\
445 */\
446 uint8_t *mbskip_table;\
447 \
448 /**\
449 * Motion vector table\
450 * - encoding: set by user\
451 * - decoding: set by lavc\
452 */\
453 int16_t (*motion_val[2])[2];\
454 \
455 /**\
456 * Macroblock type table\
457 * mb_type_base + mb_width + 2\
458 * - encoding: set by user\
459 * - decoding: set by lavc\
460 */\
461 uint32_t *mb_type;\
462 \
463 /**\
464 * Macroblock size: (0->16x16, 1->8x8, 2-> 4x4, 3-> 2x2)\
465 * - encoding: unused\
466 * - decoding: set by lavc\
467 */\
468 uint8_t motion_subsample_log2;\
469 \
470 /**\
471 * for some private data of the user\
472 * - encoding: unused\
473 * - decoding: set by user\
474 */\
475 void *opaque;\
476 \
477 /**\
478 * error\
479 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
480 * - decoding: unused\
481 */\
482 uint64_t error[4];\
483 \
484 /**\
485 * type of the buffer (to keep track of who has to dealloc data[*])\
486 * - encoding: set by the one who allocs it\
487 * - decoding: set by the one who allocs it\
488 * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
489 */\
490 int type;\
491 \
492 /**\
493 * when decoding, this signal how much the picture must be delayed.\
494 * extra_delay = repeat_pict / (2*fps)\
495 * - encoding: unused\
496 * - decoding: set by lavc\
497 */\
498 int repeat_pict;\
499 \
500 /**\
501 * \
502 */\
503 int qscale_type;\
504 \
505 /**\
506 * The content of the picture is interlaced.\
507 * - encoding: set by user\
508 * - decoding: set by lavc (default 0)\
509 */\
510 int interlaced_frame;\
511 \
512 /**\
513 * if the content is interlaced, is top field displayed first.\
514 * - encoding: set by user\
515 * - decoding: set by lavc\
516 */\
517 int top_field_first;\
518 \
519 /**\
520 * Pan scan.\
521 * - encoding: set by user\
522 * - decoding: set by lavc\
523 */\
524 AVPanScan *pan_scan;\
525 \
526 /**\
527 * tell user application that palette has changed from previous frame.\
528 * - encoding: ??? (no palette-enabled encoder yet)\
529 * - decoding: set by lavc (default 0)\
530 */\
531 int palette_has_changed;\
532 \
533 /**\
534 * Codec suggestion on buffer type if != 0\
535 * - encoding: unused\
536 * - decoding: set by lavc (before get_buffer() call))\
537 */\
538 int buffer_hints;\
539 \
540 /**\
541 * DCT coeffitients\
542 * - encoding: unused\
543 * - decoding: set by lavc\
544 */\
545 short *dct_coeff;\
546 \
547 /**\
548 * Motion referece frame index\
549 * - encoding: set by user\
550 * - decoding: set by lavc\
551 */\
552 int8_t *ref_index[2];
553
554 #define FF_QSCALE_TYPE_MPEG1 0
555 #define FF_QSCALE_TYPE_MPEG2 1
556
557 #define FF_BUFFER_TYPE_INTERNAL 1
558 #define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
559 #define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewher else, dont dealloc image (data/base), all other tables are not shared
560 #define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, dont dealloc anything
561
562
563 #define FF_I_TYPE 1 // Intra
564 #define FF_P_TYPE 2 // Predicted
565 #define FF_B_TYPE 3 // Bi-dir predicted
566 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
567 #define FF_SI_TYPE 5
568 #define FF_SP_TYPE 6
569
570 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore)
571 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
572 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
573 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
574
575 /**
576 * Audio Video Frame.
577 */
578 typedef struct AVFrame {
579 FF_COMMON_FRAME
580 } AVFrame;
581
582 #define DEFAULT_FRAME_RATE_BASE 1001000
583
584 /**
585 * Used by av_log
586 */
587 typedef struct AVCLASS AVClass;
588 struct AVCLASS {
589 const char* class_name;
590 const char* (*item_name)(void*); /* actually passing a pointer to an AVCodecContext
591 or AVFormatContext, which begin with an AVClass.
592 Needed because av_log is in libavcodec and has no visibility
593 of AVIn/OutputFormat */
594 };
595
596 /**
597 * main external api structure.
598 */
599 typedef struct AVCodecContext {
600 /**
601 * Info on struct for av_log
602 * - set by avcodec_alloc_context
603 */
604 AVClass *av_class;
605 /**
606 * the average bitrate.
607 * - encoding: set by user. unused for constant quantizer encoding
608 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
609 */
610 int bit_rate;
611
612 /**
613 * number of bits the bitstream is allowed to diverge from the reference.
614 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
615 * - encoding: set by user. unused for constant quantizer encoding
616 * - decoding: unused
617 */
618 int bit_rate_tolerance;
619
620 /**
621 * CODEC_FLAG_*.
622 * - encoding: set by user.
623 * - decoding: set by user.
624 */
625 int flags;
626
627 /**
628 * some codecs needs additionnal format info. It is stored here
629 * - encoding: set by user.
630 * - decoding: set by lavc. (FIXME is this ok?)
631 */
632 int sub_id;
633
634 /**
635 * motion estimation algorithm used for video coding.
636 * - encoding: MUST be set by user.
637 * - decoding: unused
638 */
639 int me_method;
640
641 /**
642 * some codecs need / can use extra-data like huffman tables.
643 * mjpeg: huffman tables
644 * rv10: additional flags
645 * mpeg4: global headers (they can be in the bitstream or here)
646 * - encoding: set/allocated/freed by lavc.
647 * - decoding: set/allocated/freed by user.
648 */
649 void *extradata;
650 int extradata_size;
651
652 /* video only */
653 /**
654 * frames per sec multiplied by frame_rate_base.
655 * for variable fps this is the precission, so if the timestamps
656 * can be specified in msec precssion then this is 1000*frame_rate_base
657 * - encoding: MUST be set by user
658 * - decoding: set by lavc. 0 or the frame_rate if available
659 */
660 int frame_rate;
661
662 /**
663 * width / height.
664 * - encoding: MUST be set by user.
665 * - decoding: set by user if known, codec should override / dynamically change if needed
666 */
667 int width, height;
668
669 #define FF_ASPECT_EXTENDED 15
670
671 /**
672 * the number of pictures in a group of pitures, or 0 for intra_only.
673 * - encoding: set by user.
674 * - decoding: unused
675 */
676 int gop_size;
677
678 /**
679 * pixel format, see PIX_FMT_xxx.
680 * - encoding: FIXME: used by ffmpeg to decide whether an pix_fmt
681 * conversion is in order. This only works for
682 * codecs with one supported pix_fmt, we should
683 * do something for a generic case as well.
684 * - decoding: set by lavc.
685 */
686 enum PixelFormat pix_fmt;
687
688 /**
689 * Frame rate emulation. If not zero lower layer (i.e. format handler)
690 * has to read frames at native frame rate.
691 * - encoding: set by user.
692 * - decoding: unused.
693 */
694 int rate_emu;
695
696 /**
697 * if non NULL, 'draw_horiz_band' is called by the libavcodec
698 * decoder to draw an horizontal band. It improve cache usage. Not
699 * all codecs can do that. You must check the codec capabilities
700 * before
701 * - encoding: unused
702 * - decoding: set by user.
703 * @param height the height of the slice
704 * @param y the y position of the slice
705 * @param type 1->top field, 2->bottom field, 3->frame
706 * @param offset offset into the AVFrame.data from which the slice should be read
707 */
708 void (*draw_horiz_band)(struct AVCodecContext *s,
709 const AVFrame *src, int offset[4],
710 int y, int type, int height);
711
712 /* audio only */
713 int sample_rate; ///< samples per sec
714 int channels;
715 int sample_fmt; ///< sample format, currenly unused
716
717 /* the following data should not be initialized */
718 int frame_size; ///< in samples, initialized when calling 'init'
719 int frame_number; ///< audio or video frame number
720 int real_pict_num; ///< returns the real picture number of previous encoded frame
721
722 /**
723 * number of frames the decoded output will be delayed relative to
724 * the encoded input.
725 * - encoding: set by lavc.
726 * - decoding: unused
727 */
728 int delay;
729
730 /* - encoding parameters */
731 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
732 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
733
734 /**
735 * minimum quantizer.
736 * - encoding: set by user.
737 * - decoding: unused
738 */
739 int qmin;
740
741 /**
742 * maximum quantizer.
743 * - encoding: set by user.
744 * - decoding: unused
745 */
746 int qmax;
747
748 /**
749 * maximum quantizer difference etween frames.
750 * - encoding: set by user.
751 * - decoding: unused
752 */
753 int max_qdiff;
754
755 /**
756 * maximum number of b frames between non b frames.
757 * note: the output will be delayed by max_b_frames+1 relative to the input
758 * - encoding: set by user.
759 * - decoding: unused
760 */
761 int max_b_frames;
762
763 /**
764 * qscale factor between ip and b frames.
765 * - encoding: set by user.
766 * - decoding: unused
767 */
768 float b_quant_factor;
769
770 /** obsolete FIXME remove */
771 int rc_strategy;
772 int b_frame_strategy;
773
774 /**
775 * hurry up amount.
776 * - encoding: unused
777 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
778 */
779 int hurry_up;
780
781 struct AVCodec *codec;
782
783 void *priv_data;
784
785 /* unused, FIXME remove*/
786 int rtp_mode;
787
788 int rtp_payload_size; /* The size of the RTP payload, the coder will */
789 /* do it's best to deliver a chunk with size */
790 /* below rtp_payload_size, the chunk will start */
791 /* with a start code on some codecs like H.263 */
792 /* This doesn't take account of any particular */
793 /* headers inside the transmited RTP payload */
794
795
796 /* The RTP callcack: This function is called */
797 /* every time the encoder as a packet to send */
798 /* Depends on the encoder if the data starts */
799 /* with a Start Code (it should) H.263 does */
800 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int packet_number);
801
802 /* statistics, used for 2-pass encoding */
803 int mv_bits;
804 int header_bits;
805 int i_tex_bits;
806 int p_tex_bits;
807 int i_count;
808 int p_count;
809 int skip_count;
810 int misc_bits;
811
812 /**
813 * number of bits used for the previously encoded frame.
814 * - encoding: set by lavc
815 * - decoding: unused
816 */
817 int frame_bits;
818
819 /**
820 * private data of the user, can be used to carry app specific stuff.
821 * - encoding: set by user
822 * - decoding: set by user
823 */
824 void *opaque;
825
826 char codec_name[32];
827 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
828 enum CodecID codec_id; /* see CODEC_ID_xxx */
829
830 /**
831 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
832 * this is used to workaround some encoder bugs
833 * - encoding: set by user, if not then the default based on codec_id will be used
834 * - decoding: set by user, will be converted to upper case by lavc during init
835 */
836 unsigned int codec_tag;
837
838 /**
839 * workaround bugs in encoders which sometimes cannot be detected automatically.
840 * - encoding: unused
841 * - decoding: set by user
842 */
843 int workaround_bugs;
844 #define FF_BUG_AUTODETECT 1 ///< autodetection
845 #define FF_BUG_OLD_MSMPEG4 2
846 #define FF_BUG_XVID_ILACE 4
847 #define FF_BUG_UMP4 8
848 #define FF_BUG_NO_PADDING 16
849 #define FF_BUG_AMV 32
850 #define FF_BUG_AC_VLC 0 ///< will be removed, libavcodec can now handle these non compliant files by default
851 #define FF_BUG_QPEL_CHROMA 64
852 #define FF_BUG_STD_QPEL 128
853 #define FF_BUG_QPEL_CHROMA2 256
854 #define FF_BUG_DIRECT_BLOCKSIZE 512
855 #define FF_BUG_EDGE 1024
856 #define FF_BUG_HPEL_CHROMA 2048
857 #define FF_BUG_DC_CLIP 4096
858 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
859
860 /**
861 * luma single coeff elimination threshold.
862 * - encoding: set by user
863 * - decoding: unused
864 */
865 int luma_elim_threshold;
866
867 /**
868 * chroma single coeff elimination threshold.
869 * - encoding: set by user
870 * - decoding: unused
871 */
872 int chroma_elim_threshold;
873
874 /**
875 * strictly follow the std (MPEG4, ...).
876 * - encoding: set by user
877 * - decoding: unused
878 */
879 int strict_std_compliance;
880
881 /**
882 * qscale offset between ip and b frames.
883 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
884 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
885 * - encoding: set by user.
886 * - decoding: unused
887 */
888 float b_quant_offset;
889
890 /**
891 * error resilience higher values will detect more errors but may missdetect
892 * some more or less valid parts as errors.
893 * - encoding: unused
894 * - decoding: set by user
895 */
896 int error_resilience;
897 #define FF_ER_CAREFULL 1
898 #define FF_ER_COMPLIANT 2
899 #define FF_ER_AGGRESSIVE 3
900 #define FF_ER_VERY_AGGRESSIVE 4
901
902 /**
903 * called at the beginning of each frame to get a buffer for it.
904 * if pic.reference is set then the frame will be read later by lavc
905 * avcodec_align_dimensions() should be used to find the required width and
906 * height, as they normally need to be rounded up to the next multiple of 16
907 * - encoding: unused
908 * - decoding: set by lavc, user can override
909 */
910 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
911
912 /**
913 * called to release buffers which where allocated with get_buffer.
914 * a released buffer can be reused in get_buffer()
915 * pic.data[*] must be set to NULL
916 * - encoding: unused
917 * - decoding: set by lavc, user can override
918 */
919 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
920
921 /**
922 * if 1 the stream has a 1 frame delay during decoding.
923 * - encoding: set by lavc
924 * - decoding: set by lavc
925 */
926 int has_b_frames;
927
928 int block_align; ///< used by some WAV based audio codecs
929
930 int parse_only; /* - decoding only: if true, only parsing is done
931 (function avcodec_parse_frame()). The frame
932 data is returned. Only MPEG codecs support this now. */
933
934 /**
935 * 0-> h263 quant 1-> mpeg quant.
936 * - encoding: set by user.
937 * - decoding: unused
938 */
939 int mpeg_quant;
940
941 /**
942 * pass1 encoding statistics output buffer.
943 * - encoding: set by lavc
944 * - decoding: unused
945 */
946 char *stats_out;
947
948 /**
949 * pass2 encoding statistics input buffer.
950 * concatenated stuff from stats_out of pass1 should be placed here
951 * - encoding: allocated/set/freed by user
952 * - decoding: unused
953 */
954 char *stats_in;
955
956 /**
957 * ratecontrol qmin qmax limiting method.
958 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
959 * - encoding: set by user.
960 * - decoding: unused
961 */
962 float rc_qsquish;
963
964 float rc_qmod_amp;
965 int rc_qmod_freq;
966
967 /**
968 * ratecontrol override, see RcOverride.
969 * - encoding: allocated/set/freed by user.
970 * - decoding: unused
971 */
972 RcOverride *rc_override;
973 int rc_override_count;
974
975 /**
976 * rate control equation.
977 * - encoding: set by user
978 * - decoding: unused
979 */
980 char *rc_eq;
981
982 /**
983 * maximum bitrate.
984 * - encoding: set by user.
985 * - decoding: unused
986 */
987 int rc_max_rate;
988
989 /**
990 * minimum bitrate.
991 * - encoding: set by user.
992 * - decoding: unused
993 */
994 int rc_min_rate;
995
996 /**
997 * decoder bitstream buffer size.
998 * - encoding: set by user.
999 * - decoding: unused
1000 */
1001 int rc_buffer_size;
1002 float rc_buffer_aggressivity;
1003
1004 /**
1005 * qscale factor between p and i frames.
1006 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1007 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1008 * - encoding: set by user.
1009 * - decoding: unused
1010 */
1011 float i_quant_factor;
1012
1013 /**
1014 * qscale offset between p and i frames.
1015 * - encoding: set by user.
1016 * - decoding: unused
1017 */
1018 float i_quant_offset;
1019
1020 /**
1021 * initial complexity for pass1 ratecontrol.
1022 * - encoding: set by user.
1023 * - decoding: unused
1024 */
1025 float rc_initial_cplx;
1026
1027 /**
1028 * dct algorithm, see FF_DCT_* below.
1029 * - encoding: set by user
1030 * - decoding: unused
1031 */
1032 int dct_algo;
1033 #define FF_DCT_AUTO 0
1034 #define FF_DCT_FASTINT 1
1035 #define FF_DCT_INT 2
1036 #define FF_DCT_MMX 3
1037 #define FF_DCT_MLIB 4
1038 #define FF_DCT_ALTIVEC 5
1039 #define FF_DCT_FAAN 6
1040
1041 /**
1042 * luminance masking (0-> disabled).
1043 * - encoding: set by user
1044 * - decoding: unused
1045 */
1046 float lumi_masking;
1047
1048 /**
1049 * temporary complexity masking (0-> disabled).
1050 * - encoding: set by user
1051 * - decoding: unused
1052 */
1053 float temporal_cplx_masking;
1054
1055 /**
1056 * spatial complexity masking (0-> disabled).
1057 * - encoding: set by user
1058 * - decoding: unused
1059 */
1060 float spatial_cplx_masking;
1061
1062 /**
1063 * p block masking (0-> disabled).
1064 * - encoding: set by user
1065 * - decoding: unused
1066 */
1067 float p_masking;
1068
1069 /**
1070 * darkness masking (0-> disabled).
1071 * - encoding: set by user
1072 * - decoding: unused
1073 */
1074 float dark_masking;
1075
1076
1077 /* for binary compatibility */
1078 int unused;
1079
1080 /**
1081 * idct algorithm, see FF_IDCT_* below.
1082 * - encoding: set by user
1083 * - decoding: set by user
1084 */
1085 int idct_algo;
1086 #define FF_IDCT_AUTO 0
1087 #define FF_IDCT_INT 1
1088 #define FF_IDCT_SIMPLE 2
1089 #define FF_IDCT_SIMPLEMMX 3
1090 #define FF_IDCT_LIBMPEG2MMX 4
1091 #define FF_IDCT_PS2 5
1092 #define FF_IDCT_MLIB 6
1093 #define FF_IDCT_ARM 7
1094 #define FF_IDCT_ALTIVEC 8
1095 #define FF_IDCT_SH4 9
1096 #define FF_IDCT_SIMPLEARM 10
1097
1098 /**
1099 * slice count.
1100 * - encoding: set by lavc
1101 * - decoding: set by user (or 0)
1102 */
1103 int slice_count;
1104 /**
1105 * slice offsets in the frame in bytes.
1106 * - encoding: set/allocated by lavc
1107 * - decoding: set/allocated by user (or NULL)
1108 */
1109 int *slice_offset;
1110
1111 /**
1112 * error concealment flags.
1113 * - encoding: unused
1114 * - decoding: set by user
1115 */
1116 int error_concealment;
1117 #define FF_EC_GUESS_MVS 1
1118 #define FF_EC_DEBLOCK 2
1119
1120 /**
1121 * dsp_mask could be add used to disable unwanted CPU features
1122 * CPU features (i.e. MMX, SSE. ...)
1123 *
1124 * with FORCE flag you may instead enable given CPU features
1125 * (Dangerous: usable in case of misdetection, improper usage however will
1126 * result into program crash)
1127 */
1128 unsigned dsp_mask;
1129 #define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
1130 /* lower 16 bits - CPU features */
1131 #ifdef HAVE_MMX
1132 #define FF_MM_MMX 0x0001 /* standard MMX */
1133 #define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
1134 #define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
1135 #define FF_MM_SSE 0x0008 /* SSE functions */
1136 #define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
1137 #endif /* HAVE_MMX */
1138
1139 /**
1140 * bits per sample/pixel from the demuxer (needed for huffyuv).
1141 * - encoding: set by lavc
1142 * - decoding: set by user
1143 */
1144 int bits_per_sample;
1145
1146 /**
1147 * prediction method (needed for huffyuv).
1148 * - encoding: set by user
1149 * - decoding: unused
1150 */
1151 int prediction_method;
1152 #define FF_PRED_LEFT 0
1153 #define FF_PRED_PLANE 1
1154 #define FF_PRED_MEDIAN 2
1155
1156 /**
1157 * sample aspect ratio (0 if unknown).
1158 * numerator and denominator must be relative prime and smaller then 256 for some video standards
1159 * - encoding: set by user.
1160 * - decoding: set by lavc.
1161 */
1162 AVRational sample_aspect_ratio;
1163
1164 /**
1165 * the picture in the bitstream.
1166 * - encoding: set by lavc
1167 * - decoding: set by lavc
1168 */
1169 AVFrame *coded_frame;
1170
1171 /**
1172 * debug.
1173 * - encoding: set by user.
1174 * - decoding: set by user.
1175 */
1176 int debug;
1177 #define FF_DEBUG_PICT_INFO 1
1178 #define FF_DEBUG_RC 2
1179 #define FF_DEBUG_BITSTREAM 4
1180 #define FF_DEBUG_MB_TYPE 8
1181 #define FF_DEBUG_QP 16
1182 #define FF_DEBUG_MV 32
1183 #define FF_DEBUG_DCT_COEFF 0x00000040
1184 #define FF_DEBUG_SKIP 0x00000080
1185 #define FF_DEBUG_STARTCODE 0x00000100
1186 #define FF_DEBUG_PTS 0x00000200
1187 #define FF_DEBUG_ER 0x00000400
1188 #define FF_DEBUG_MMCO 0x00000800
1189 #define FF_DEBUG_BUGS 0x00001000
1190 #define FF_DEBUG_VIS_QP 0x00002000
1191 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1192
1193 /**
1194 * debug.
1195 * - encoding: set by user.
1196 * - decoding: set by user.
1197 */
1198 int debug_mv;
1199 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1200 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1201 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1202
1203 /**
1204 * error.
1205 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1206 * - decoding: unused
1207 */
1208 uint64_t error[4];
1209
1210 /**
1211 * minimum MB quantizer.
1212 * - encoding: set by user.
1213 * - decoding: unused
1214 */
1215 int mb_qmin;
1216
1217 /**
1218 * maximum MB quantizer.
1219 * - encoding: set by user.
1220 * - decoding: unused
1221 */
1222 int mb_qmax;
1223
1224 /**
1225 * motion estimation compare function.
1226 * - encoding: set by user.
1227 * - decoding: unused
1228 */
1229 int me_cmp;
1230 /**
1231 * subpixel motion estimation compare function.
1232 * - encoding: set by user.
1233 * - decoding: unused
1234 */
1235 int me_sub_cmp;
1236 /**
1237 * macroblock compare function (not supported yet).
1238 * - encoding: set by user.
1239 * - decoding: unused
1240 */
1241 int mb_cmp;
1242 /**
1243 * interlaced dct compare function
1244 * - encoding: set by user.
1245 * - decoding: unused
1246 */
1247 int ildct_cmp;
1248 #define FF_CMP_SAD 0
1249 #define FF_CMP_SSE 1
1250 #define FF_CMP_SATD 2
1251 #define FF_CMP_DCT 3
1252 #define FF_CMP_PSNR 4
1253 #define FF_CMP_BIT 5
1254 #define FF_CMP_RD 6
1255 #define FF_CMP_ZERO 7
1256 #define FF_CMP_VSAD 8
1257 #define FF_CMP_VSSE 9
1258 #define FF_CMP_NSSE 10
1259 #define FF_CMP_CHROMA 256
1260
1261 /**
1262 * ME diamond size & shape.
1263 * - encoding: set by user.
1264 * - decoding: unused
1265 */
1266 int dia_size;
1267
1268 /**
1269 * amount of previous MV predictors (2a+1 x 2a+1 square).
1270 * - encoding: set by user.
1271 * - decoding: unused
1272 */
1273 int last_predictor_count;
1274
1275 /**
1276 * pre pass for motion estimation.
1277 * - encoding: set by user.
1278 * - decoding: unused
1279 */
1280 int pre_me;
1281
1282 /**
1283 * motion estimation pre pass compare function.
1284 * - encoding: set by user.
1285 * - decoding: unused
1286 */
1287 int me_pre_cmp;
1288
1289 /**
1290 * ME pre pass diamond size & shape.
1291 * - encoding: set by user.
1292 * - decoding: unused
1293 */
1294 int pre_dia_size;
1295
1296 /**
1297 * subpel ME quality.
1298 * - encoding: set by user.
1299 * - decoding: unused
1300 */
1301 int me_subpel_quality;
1302
1303 /**
1304 * callback to negotiate the pixelFormat.
1305 * @param fmt is the list of formats which are supported by the codec,
1306 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1307 * the first is allways the native one
1308 * @return the choosen format
1309 * - encoding: unused
1310 * - decoding: set by user, if not set then the native format will always be choosen
1311 */
1312 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1313
1314 /**
1315 * DTG active format information (additionnal aspect ratio
1316 * information only used in DVB MPEG2 transport streams). 0 if
1317 * not set.
1318 *
1319 * - encoding: unused.
1320 * - decoding: set by decoder
1321 */
1322 int dtg_active_format;
1323 #define FF_DTG_AFD_SAME 8
1324 #define FF_DTG_AFD_4_3 9
1325 #define FF_DTG_AFD_16_9 10
1326 #define FF_DTG_AFD_14_9 11
1327 #define FF_DTG_AFD_4_3_SP_14_9 13
1328 #define FF_DTG_AFD_16_9_SP_14_9 14
1329 #define FF_DTG_AFD_SP_4_3 15
1330
1331 /**
1332 * Maximum motion estimation search range in subpel units.
1333 * if 0 then no limit
1334 *
1335 * - encoding: set by user.
1336 * - decoding: unused.
1337 */
1338 int me_range;
1339
1340 /**
1341 * frame_rate_base.
1342 * for variable fps this is 1
1343 * - encoding: set by user.
1344 * - decoding: set by lavc.
1345 * @todo move this after frame_rate
1346 */
1347
1348 int frame_rate_base;
1349 /**
1350 * intra quantizer bias.
1351 * - encoding: set by user.
1352 * - decoding: unused
1353 */
1354 int intra_quant_bias;
1355 #define FF_DEFAULT_QUANT_BIAS 999999
1356
1357 /**
1358 * inter quantizer bias.
1359 * - encoding: set by user.
1360 * - decoding: unused
1361 */
1362 int inter_quant_bias;
1363
1364 /**
1365 * color table ID.
1366 * - encoding: unused.
1367 * - decoding: which clrtable should be used for 8bit RGB images
1368 * table have to be stored somewhere FIXME
1369 */
1370 int color_table_id;
1371
1372 /**
1373 * internal_buffer count.
1374 * Dont touch, used by lavc default_get_buffer()
1375 */
1376 int internal_buffer_count;
1377
1378 /**
1379 * internal_buffers.
1380 * Dont touch, used by lavc default_get_buffer()
1381 */
1382 void *internal_buffer;
1383
1384 #define FF_LAMBDA_SHIFT 7
1385 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1386 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1387 #define FF_LAMBDA_MAX (256*128-1)
1388
1389 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1390 /**
1391 * global quality for codecs which cannot change it per frame.
1392 * this should be proportional to MPEG1/2/4 qscale.
1393 * - encoding: set by user.
1394 * - decoding: unused
1395 */
1396 int global_quality;
1397
1398 #define FF_CODER_TYPE_VLC 0
1399 #define FF_CODER_TYPE_AC 1
1400 /**
1401 * coder type
1402 * - encoding: set by user.
1403 * - decoding: unused
1404 */
1405 int coder_type;
1406
1407 /**
1408 * context model
1409 * - encoding: set by user.
1410 * - decoding: unused
1411 */
1412 int context_model;
1413
1414 /**
1415 * slice flags
1416 * - encoding: unused
1417 * - decoding: set by user.
1418 */
1419 int slice_flags;
1420 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1421 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1422 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1423
1424 /**
1425 * XVideo Motion Acceleration
1426 * - encoding: forbidden
1427 * - decoding: set by decoder
1428 */
1429 int xvmc_acceleration;
1430
1431 /**
1432 * macroblock decision mode
1433 * - encoding: set by user.
1434 * - decoding: unused
1435 */
1436 int mb_decision;
1437 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1438 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1439 #define FF_MB_DECISION_RD 2 ///< rate distoration
1440
1441 /**
1442 * custom intra quantization matrix
1443 * - encoding: set by user, can be NULL
1444 * - decoding: set by lavc
1445 */
1446 uint16_t *intra_matrix;
1447
1448 /**
1449 * custom inter quantization matrix
1450 * - encoding: set by user, can be NULL
1451 * - decoding: set by lavc
1452 */
1453 uint16_t *inter_matrix;
1454
1455 /**
1456 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1457 * this is used to workaround some encoder bugs
1458 * - encoding: unused
1459 * - decoding: set by user, will be converted to upper case by lavc during init
1460 */
1461 unsigned int stream_codec_tag;
1462
1463 /**
1464 * scene change detection threshold.
1465 * 0 is default, larger means fewer detected scene changes
1466 * - encoding: set by user.
1467 * - decoding: unused
1468 */
1469 int scenechange_threshold;
1470
1471 /**
1472 * minimum lagrange multipler
1473 * - encoding: set by user.
1474 * - decoding: unused
1475 */
1476 int lmin;
1477
1478 /**
1479 * maximum lagrange multipler
1480 * - encoding: set by user.
1481 * - decoding: unused
1482 */
1483 int lmax;
1484
1485 /**
1486 * Palette control structure
1487 * - encoding: ??? (no palette-enabled encoder yet)
1488 * - decoding: set by user.
1489 */
1490 struct AVPaletteControl *palctrl;
1491
1492 /**
1493 * noise reduction strength
1494 * - encoding: set by user.
1495 * - decoding: unused
1496 */
1497 int noise_reduction;
1498
1499 /**
1500 * called at the beginning of a frame to get cr buffer for it.
1501 * buffer type (size, hints) must be the same. lavc won't check it.
1502 * lavc will pass previous buffer in pic, function should return
1503 * same buffer or new buffer with old frame "painted" into it.
1504 * if pic.data[0] == NULL must behave like get_buffer().
1505 * - encoding: unused
1506 * - decoding: set by lavc, user can override
1507 */
1508 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1509
1510 /**
1511 * number of bits which should be loaded into the rc buffer before decoding starts
1512 * - encoding: set by user.
1513 * - decoding: unused
1514 */
1515 int rc_initial_buffer_occupancy;
1516
1517 /**
1518 *
1519 * - encoding: set by user.
1520 * - decoding: unused
1521 */
1522 int inter_threshold;
1523
1524 /**
1525 * CODEC_FLAG2_*.
1526 * - encoding: set by user.
1527 * - decoding: set by user.
1528 */
1529 int flags2;
1530
1531 /**
1532 * simulates errors in the bitstream to test error concealment.
1533 * - encoding: set by user.
1534 * - decoding: unused.
1535 */
1536 int error_rate;
1537
1538 /**
1539 * MP3 antialias algorithm, see FF_AA_* below.
1540 * - encoding: unused
1541 * - decoding: set by user
1542 */
1543 int antialias_algo;
1544 #define FF_AA_AUTO 0
1545 #define FF_AA_FASTINT 1 //not implemented yet
1546 #define FF_AA_INT 2
1547 #define FF_AA_FLOAT 3
1548 /**
1549 * Quantizer noise shaping.
1550 * - encoding: set by user
1551 * - decoding: unused
1552 */
1553 int quantizer_noise_shaping;
1554
1555 /**
1556 * Thread count.
1557 * is used to decide how many independant tasks should be passed to execute()
1558 * - encoding: set by user
1559 * - decoding: set by user
1560 */
1561 int thread_count;
1562
1563 /**
1564 * the codec may call this to execute several independant things. it will return only after
1565 * finishing all tasks, the user may replace this with some multithreaded implementation, the
1566 * default implementation will execute the parts serially
1567 * @param count the number of things to execute
1568 * - encoding: set by lavc, user can override
1569 * - decoding: set by lavc, user can override
1570 */
1571 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1572
1573 /**
1574 * Thread opaque.
1575 * can be used by execute() to store some per AVCodecContext stuff.
1576 * - encoding: set by execute()
1577 * - decoding: set by execute()
1578 */
1579 void *thread_opaque;
1580
1581 /**
1582 * Motion estimation threshold. under which no motion estimation is
1583 * performed, but instead the user specified motion vectors are used
1584 *
1585 * - encoding: set by user
1586 * - decoding: unused
1587 */
1588 int me_threshold;
1589
1590 /**
1591 * Macroblock threshold. under which the user specified macroblock types will be used
1592 * - encoding: set by user
1593 * - decoding: unused
1594 */
1595 int mb_threshold;
1596
1597 /**
1598 * precision of the intra dc coefficient - 8.
1599 * - encoding: set by user
1600 * - decoding: unused
1601 */
1602 int intra_dc_precision;
1603
1604 /**
1605 * noise vs. sse weight for the nsse comparsion function.
1606 * - encoding: set by user
1607 * - decoding: unused
1608 */
1609 int nsse_weight;
1610
1611 /**
1612 * number of macroblock rows at the top which are skiped.
1613 * - encoding: unused
1614 * - decoding: set by user
1615 */
1616 int skip_top;
1617
1618 /**
1619 * number of macroblock rows at the bottom which are skiped.
1620 * - encoding: unused
1621 * - decoding: set by user
1622 */
1623 int skip_bottom;
1624 } AVCodecContext;
1625
1626
1627 /**
1628 * AVOption.
1629 */
1630 typedef struct AVOption {
1631 /** options' name */
1632 const char *name; /* if name is NULL, it indicates a link to next */
1633 /** short English text help or const struct AVOption* subpointer */
1634 const char *help; // const struct AVOption* sub;
1635 /** offset to context structure where the parsed value should be stored */
1636 int offset;
1637 /** options' type */
1638 int type;
1639 #define FF_OPT_TYPE_BOOL 1 ///< boolean - true,1,on (or simply presence)
1640 #define FF_OPT_TYPE_DOUBLE 2 ///< double
1641 #define FF_OPT_TYPE_INT 3 ///< integer
1642 #define FF_OPT_TYPE_STRING 4 ///< string (finished with \0)
1643 #define FF_OPT_TYPE_MASK 0x1f ///< mask for types - upper bits are various flags
1644 //#define FF_OPT_TYPE_EXPERT 0x20 // flag for expert option
1645 #define FF_OPT_TYPE_FLAG (FF_OPT_TYPE_BOOL | 0x40)
1646 #define FF_OPT_TYPE_RCOVERRIDE (FF_OPT_TYPE_STRING | 0x80)
1647 /** min value (min == max -> no limits) */
1648 double min;
1649 /** maximum value for double/int */
1650 double max;
1651 /** default boo [0,1]l/double/int value */
1652 double defval;
1653 /**
1654 * default string value (with optional semicolon delimited extra option-list
1655 * i.e. option1;option2;option3
1656 * defval might select other then first argument as default
1657 */
1658 const char *defstr;
1659 #define FF_OPT_MAX_DEPTH 10
1660 } AVOption;
1661
1662 /**
1663 * Parse option(s) and sets fields in passed structure
1664 * @param strct structure where the parsed results will be written
1665 * @param list list with AVOptions
1666 * @param opts string with options for parsing
1667 */
1668 int avoption_parse(void* strct, const AVOption* list, const char* opts);
1669
1670
1671 /**
1672 * AVCodec.
1673 */
1674 typedef struct AVCodec {
1675 const char *name;
1676 enum CodecType type;
1677 int id;
1678 int priv_data_size;
1679 int (*init)(AVCodecContext *);
1680 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
1681 int (*close)(AVCodecContext *);
1682 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
1683 uint8_t *buf, int buf_size);
1684 int capabilities;
1685 const AVOption *options;
1686 struct AVCodec *next;
1687 void (*flush)(AVCodecContext *);
1688 const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
1689 const enum PixelFormat *pix_fmts; ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
1690 } AVCodec;
1691
1692 /**
1693 * four components are given, that's all.
1694 * the last component is alpha
1695 */
1696 typedef struct AVPicture {
1697 uint8_t *data[4];
1698 int linesize[4]; ///< number of bytes per line
1699 } AVPicture;
1700
1701 /**
1702 * AVPaletteControl
1703 * This structure defines a method for communicating palette changes
1704 * between and demuxer and a decoder.
1705 */
1706 #define AVPALETTE_SIZE 1024
1707 #define AVPALETTE_COUNT 256
1708 typedef struct AVPaletteControl {
1709
1710 /* demuxer sets this to 1 to indicate the palette has changed;
1711 * decoder resets to 0 */
1712 int palette_changed;
1713
1714 /* 4-byte ARGB palette entries, stored in native byte order; note that
1715 * the individual palette components should be on a 8-bit scale; if
1716 * the palette data comes from a IBM VGA native format, the component
1717 * data is probably 6 bits in size and needs to be scaled */
1718 unsigned int palette[AVPALETTE_COUNT];
1719
1720 } AVPaletteControl;
1721
1722 extern AVCodec ac3_encoder;
1723 extern AVCodec mp2_encoder;
1724 extern AVCodec mp3lame_encoder;
1725 extern AVCodec oggvorbis_encoder;
1726 extern AVCodec faac_encoder;
1727 extern AVCodec mpeg1video_encoder;
1728 extern AVCodec mpeg2video_encoder;
1729 extern AVCodec h263_encoder;
1730 extern AVCodec h263p_encoder;
1731 extern AVCodec flv_encoder;
1732 extern AVCodec rv10_encoder;
1733 extern AVCodec rv20_encoder;
1734 extern AVCodec dvvideo_encoder;
1735 extern AVCodec mjpeg_encoder;
1736 extern AVCodec ljpeg_encoder;
1737 extern AVCodec mpeg4_encoder;
1738 extern AVCodec msmpeg4v1_encoder;
1739 extern AVCodec msmpeg4v2_encoder;
1740 extern AVCodec msmpeg4v3_encoder;
1741 extern AVCodec wmv1_encoder;
1742 extern AVCodec wmv2_encoder;
1743 extern AVCodec huffyuv_encoder;
1744 extern AVCodec h264_encoder;
1745 extern AVCodec asv1_encoder;
1746 extern AVCodec asv2_encoder;
1747 extern AVCodec vcr1_encoder;
1748 extern AVCodec ffv1_encoder;
1749 extern AVCodec mdec_encoder;
1750 extern AVCodec zlib_encoder;
1751 extern AVCodec svq1_encoder;
1752
1753 extern AVCodec h263_decoder;
1754 extern AVCodec h261_decoder;
1755 extern AVCodec mpeg4_decoder;
1756 extern AVCodec msmpeg4v1_decoder;
1757 extern AVCodec msmpeg4v2_decoder;
1758 extern AVCodec msmpeg4v3_decoder;
1759 extern AVCodec wmv1_decoder;
1760 extern AVCodec wmv2_decoder;
1761 extern AVCodec mpeg1video_decoder;
1762 extern AVCodec mpeg2video_decoder;
1763 extern AVCodec mpegvideo_decoder;
1764 extern AVCodec mpeg_xvmc_decoder;
1765 extern AVCodec h263i_decoder;
1766 extern AVCodec flv_decoder;
1767 extern AVCodec rv10_decoder;
1768 extern AVCodec rv20_decoder;
1769 extern AVCodec svq1_decoder;
1770 extern AVCodec svq3_decoder;
1771 extern AVCodec dvvideo_decoder;
1772 extern AVCodec wmav1_decoder;
1773 extern AVCodec wmav2_decoder;
1774 extern AVCodec mjpeg_decoder;
1775 extern AVCodec mjpegb_decoder;
1776 extern AVCodec sp5x_decoder;
1777 extern AVCodec mp2_decoder;
1778 extern AVCodec mp3_decoder;
1779 extern AVCodec mace3_decoder;
1780 extern AVCodec mace6_decoder;
1781 extern AVCodec huffyuv_decoder;
1782 extern AVCodec oggvorbis_decoder;
1783 extern AVCodec cyuv_decoder;
1784 extern AVCodec h264_decoder;
1785 extern AVCodec indeo3_decoder;
1786 extern AVCodec vp3_decoder;
1787 extern AVCodec theora_decoder;
1788 extern AVCodec amr_nb_decoder;
1789 extern AVCodec amr_nb_encoder;
1790 extern AVCodec amr_wb_encoder;
1791 extern AVCodec amr_wb_decoder;
1792 extern AVCodec aac_decoder;
1793 extern AVCodec mpeg4aac_decoder;
1794 extern AVCodec asv1_decoder;
1795 extern AVCodec asv2_decoder;
1796 extern AVCodec vcr1_decoder;
1797 extern AVCodec cljr_decoder;
1798 extern AVCodec ffv1_decoder;
1799 extern AVCodec fourxm_decoder;
1800 extern AVCodec mdec_decoder;
1801 extern AVCodec roq_decoder;
1802 extern AVCodec interplay_video_decoder;
1803 extern AVCodec xan_wc3_decoder;
1804 extern AVCodec rpza_decoder;
1805 extern AVCodec cinepak_decoder;
1806 extern AVCodec msrle_decoder;
1807 extern AVCodec msvideo1_decoder;
1808 extern AVCodec vqa_decoder;
1809 extern AVCodec idcin_decoder;
1810 extern AVCodec eightbps_decoder;
1811 extern AVCodec smc_decoder;
1812 extern AVCodec flic_decoder;
1813 extern AVCodec vmdvideo_decoder;
1814 extern AVCodec vmdaudio_decoder;
1815 extern AVCodec truemotion1_decoder;
1816 extern AVCodec mszh_decoder;
1817 extern AVCodec zlib_decoder;
1818 extern AVCodec ra_144_decoder;
1819 extern AVCodec ra_288_decoder;
1820 extern AVCodec roq_dpcm_decoder;
1821 extern AVCodec interplay_dpcm_decoder;
1822 extern AVCodec xan_dpcm_decoder;
1823 extern AVCodec qtrle_decoder;
1824 extern AVCodec flac_decoder;
1825
1826 /* pcm codecs */
1827 #define PCM_CODEC(id, name) \
1828 extern AVCodec name ## _decoder; \
1829 extern AVCodec name ## _encoder
1830
1831 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
1832 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
1833 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
1834 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
1835 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
1836 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
1837 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
1838 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
1839
1840 /* adpcm codecs */
1841
1842 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
1843 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
1844 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
1845 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
1846 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
1847 PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
1848 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
1849 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
1850 PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
1851 PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
1852 PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
1853 PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
1854
1855 #undef PCM_CODEC
1856
1857 /* dummy raw video codec */
1858 extern AVCodec rawvideo_encoder;
1859 extern AVCodec rawvideo_decoder;
1860
1861 /* the following codecs use external GPL libs */
1862 extern AVCodec ac3_decoder;
1863 extern AVCodec dts_decoder;
1864
1865 /* resample.c */
1866
1867 struct ReSampleContext;
1868 struct AVResampleContext;
1869
1870 typedef struct ReSampleContext ReSampleContext;
1871
1872 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
1873 int output_rate, int input_rate);
1874 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
1875 void audio_resample_close(ReSampleContext *s);
1876
1877 struct AVResampleContext *av_resample_init(int out_rate, int in_rate);
1878 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
1879 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
1880 void av_resample_close(struct AVResampleContext *c);
1881
1882 /* YUV420 format is assumed ! */
1883
1884 struct ImgReSampleContext;
1885
1886 typedef struct ImgReSampleContext ImgReSampleContext;
1887
1888 ImgReSampleContext *img_resample_init(int output_width, int output_height,
1889 int input_width, int input_height);
1890
1891 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
1892 int iwidth, int iheight,
1893 int topBand, int bottomBand,
1894 int leftBand, int rightBand,
1895 int padtop, int padbottom,
1896 int padleft, int padright);
1897
1898
1899 void img_resample(ImgReSampleContext *s,
1900 AVPicture *output, const AVPicture *input);
1901
1902 void img_resample_close(ImgReSampleContext *s);
1903
1904 /**
1905 * Allocate memory for a picture. Call avpicture_free to free it.
1906 *
1907 * @param picture the picture to be filled in.
1908 * @param pix_fmt the format of the picture.
1909 * @param width the width of the picture.
1910 * @param height the height of the picture.
1911 * @return 0 if successful, -1 if not.
1912 */
1913 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
1914
1915 /* Free a picture previously allocated by avpicture_alloc. */
1916 void avpicture_free(AVPicture *picture);
1917
1918 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
1919 int pix_fmt, int width, int height);
1920 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
1921 unsigned char *dest, int dest_size);
1922 int avpicture_get_size(int pix_fmt, int width, int height);
1923 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
1924 const char *avcodec_get_pix_fmt_name(int pix_fmt);
1925 enum PixelFormat avcodec_get_pix_fmt(const char* name);
1926
1927 #define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
1928 #define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
1929 #define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
1930 #define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
1931 #define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
1932 #define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
1933
1934 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
1935 int has_alpha);
1936 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
1937 int has_alpha, int *loss_ptr);
1938
1939 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
1940 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
1941 int img_get_alpha_info(const AVPicture *src,
1942 int pix_fmt, int width, int height);
1943
1944 /* convert among pixel formats */
1945 int img_convert(AVPicture *dst, int dst_pix_fmt,
1946 const AVPicture *src, int pix_fmt,
1947 int width, int height);
1948
1949 /* deinterlace a picture */
1950 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
1951 int pix_fmt, int width, int height);
1952
1953 /* external high level API */
1954
1955 extern AVCodec *first_avcodec;
1956
1957 /* returns LIBAVCODEC_VERSION_INT constant */
1958 unsigned avcodec_version(void);
1959 /* returns LIBAVCODEC_BUILD constant */
1960 unsigned avcodec_build(void);
1961 void avcodec_init(void);
1962
1963 void register_avcodec(AVCodec *format);
1964 AVCodec *avcodec_find_encoder(enum CodecID id);
1965 AVCodec *avcodec_find_encoder_by_name(const char *name);
1966 AVCodec *avcodec_find_decoder(enum CodecID id);
1967 AVCodec *avcodec_find_decoder_by_name(const char *name);
1968 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
1969
1970 void avcodec_get_context_defaults(AVCodecContext *s);
1971 AVCodecContext *avcodec_alloc_context(void);
1972 void avcodec_get_frame_defaults(AVFrame *pic);
1973 AVFrame *avcodec_alloc_frame(void);
1974
1975 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
1976 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
1977 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
1978 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
1979 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
1980
1981 int avcodec_thread_init(AVCodecContext *s, int thread_count);
1982 void avcodec_thread_free(AVCodecContext *s);
1983 int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
1984 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
1985 //FIXME func typedef
1986
1987 /**
1988 * opens / inits the AVCodecContext.
1989 * not thread save!
1990 */
1991 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
1992
1993 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
1994 int *frame_size_ptr,
1995 uint8_t *buf, int buf_size);
1996 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
1997 int *got_picture_ptr,
1998 uint8_t *buf, int buf_size);
1999 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2000 int *data_size_ptr,
2001 uint8_t *buf, int buf_size);
2002 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2003 const short *samples);
2004 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2005 const AVFrame *pict);
2006
2007 int avcodec_close(AVCodecContext *avctx);
2008
2009 void avcodec_register_all(void);
2010
2011 void avcodec_flush_buffers(AVCodecContext *avctx);
2012
2013 /* misc usefull functions */
2014
2015 /**
2016 * returns a single letter to describe the picture type
2017 */
2018 char av_get_pict_type_char(int pict_type);
2019
2020 /**
2021 * reduce a fraction.
2022 * this is usefull for framerate calculations
2023 * @param max the maximum allowed for dst_nom & dst_den
2024 * @return 1 if exact, 0 otherwise
2025 */
2026 int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max);
2027
2028 /**
2029 * rescale a 64bit integer.
2030 * a simple a*b/c isnt possible as it can overflow
2031 */
2032 int64_t av_rescale(int64_t a, int64_t b, int64_t c);
2033
2034
2035 /**
2036 * Interface for 0.5.0 version
2037 *
2038 * do not even think about it's usage for this moment
2039 */
2040
2041 typedef struct {
2042 /// compressed size used from given memory buffer
2043 int size;
2044 /// I/P/B frame type
2045 int frame_type;
2046 } avc_enc_result_t;
2047
2048 /**
2049 * Commands
2050 * order can't be changed - once it was defined
2051 */
2052 typedef enum {
2053 // general commands
2054 AVC_OPEN_BY_NAME = 0xACA000,
2055 AVC_OPEN_BY_CODEC_ID,
2056 AVC_OPEN_BY_FOURCC,
2057 AVC_CLOSE,
2058
2059 AVC_FLUSH,
2060 // pin - struct { uint8_t* src, uint_t src_size }
2061 // pout - struct { AVPicture* img, consumed_bytes,
2062 AVC_DECODE,
2063 // pin - struct { AVPicture* img, uint8_t* dest, uint_t dest_size }
2064 // pout - uint_t used_from_dest_size
2065 AVC_ENCODE,
2066
2067 // query/get video commands
2068 AVC_GET_VERSION = 0xACB000,
2069 AVC_GET_WIDTH,
2070 AVC_GET_HEIGHT,
2071 AVC_GET_DELAY,
2072 AVC_GET_QUANT_TABLE,
2073 // ...
2074
2075 // query/get audio commands
2076 AVC_GET_FRAME_SIZE = 0xABC000,
2077
2078 // maybe define some simple structure which
2079 // might be passed to the user - but they can't
2080 // contain any codec specific parts and these
2081 // calls are usualy necessary only few times
2082
2083 // set video commands
2084 AVC_SET_WIDTH = 0xACD000,
2085 AVC_SET_HEIGHT,
2086
2087 // set video encoding commands
2088 AVC_SET_FRAME_RATE = 0xACD800,
2089 AVC_SET_QUALITY,
2090 AVC_SET_HURRY_UP,
2091
2092 // set audio commands
2093 AVC_SET_SAMPLE_RATE = 0xACE000,
2094 AVC_SET_CHANNELS,
2095
2096 } avc_cmd_t;
2097
2098 /**
2099 * \param handle allocated private structure by libavcodec
2100 * for initialization pass NULL - will be returned pout
2101 * user is supposed to know nothing about its structure
2102 * \param cmd type of operation to be performed
2103 * \param pint input parameter
2104 * \param pout output parameter
2105 *
2106 * \returns command status - eventually for query command it might return
2107 * integer resulting value
2108 */
2109 int avcodec(void* handle, avc_cmd_t cmd, void* pin, void* pout);
2110
2111 /* frame parsing */
2112 typedef struct AVCodecParserContext {
2113 void *priv_data;
2114 struct AVCodecParser *parser;
2115 int64_t frame_offset; /* offset of the current frame */
2116 int64_t cur_offset; /* current offset
2117 (incremented by each av_parser_parse()) */
2118 int64_t last_frame_offset; /* offset of the last frame */
2119 /* video info */
2120 int pict_type; /* XXX: put it back in AVCodecContext */
2121 int repeat_pict; /* XXX: put it back in AVCodecContext */
2122 int64_t pts; /* pts of the current frame */
2123 int64_t dts; /* dts of the current frame */
2124
2125 /* private data */
2126 int64_t last_pts;
2127 int64_t last_dts;
2128 int fetch_timestamp;
2129
2130 #define AV_PARSER_PTS_NB 4
2131 int cur_frame_start_index;
2132 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2133 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2134 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2135 } AVCodecParserContext;
2136
2137 typedef struct AVCodecParser {
2138 int codec_ids[3]; /* several codec IDs are permitted */
2139 int priv_data_size;
2140 int (*parser_init)(AVCodecParserContext *s);
2141 int (*parser_parse)(AVCodecParserContext *s,
2142 AVCodecContext *avctx,
2143 uint8_t **poutbuf, int *poutbuf_size,
2144 const uint8_t *buf, int buf_size);
2145 void (*parser_close)(AVCodecParserContext *s);
2146 struct AVCodecParser *next;
2147 } AVCodecParser;
2148
2149 extern AVCodecParser *av_first_parser;
2150
2151 void av_register_codec_parser(AVCodecParser *parser);
2152 AVCodecParserContext *av_parser_init(int codec_id);
2153 int av_parser_parse(AVCodecParserContext *s,
2154 AVCodecContext *avctx,
2155 uint8_t **poutbuf, int *poutbuf_size,
2156 const uint8_t *buf, int buf_size,
2157 int64_t pts, int64_t dts);
2158 void av_parser_close(AVCodecParserContext *s);
2159
2160 extern AVCodecParser mpegvideo_parser;
2161 extern AVCodecParser mpeg4video_parser;
2162 extern AVCodecParser h261_parser;
2163 extern AVCodecParser h263_parser;
2164 extern AVCodecParser h264_parser;
2165 extern AVCodecParser mpegaudio_parser;
2166 extern AVCodecParser ac3_parser;
2167
2168 /* memory */
2169 void *av_malloc(unsigned int size);
2170 void *av_mallocz(unsigned int size);
2171 void *av_realloc(void *ptr, unsigned int size);
2172 void av_free(void *ptr);
2173 char *av_strdup(const char *s);
2174 void av_freep(void *ptr);
2175 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2176 /* for static data only */
2177 /* call av_free_static to release all staticaly allocated tables */
2178 void av_free_static(void);
2179 void *av_mallocz_static(unsigned int size);
2180
2181 /* add by bero : in adx.c */
2182 int is_adx(const unsigned char *buf,size_t bufsize);
2183
2184 void img_copy(AVPicture *dst, const AVPicture *src,
2185 int pix_fmt, int width, int height);
2186
2187 /* av_log API */
2188
2189 #include <stdarg.h>
2190
2191 #define AV_LOG_QUIET -1
2192 #define AV_LOG_ERROR 0
2193 #define AV_LOG_INFO 1
2194 #define AV_LOG_DEBUG 2
2195
2196 #ifdef __GNUC__
2197 extern void av_log(void*, int level, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 3, 4)));
2198 #else
2199 extern void av_log(void*, int level, const char *fmt, ...);
2200 #endif
2201
2202 extern void av_vlog(void*, int level, const char *fmt, va_list);
2203 extern int av_log_get_level(void);
2204 extern void av_log_set_level(int);
2205 extern void av_log_set_callback(void (*)(void*, int, const char*, va_list));
2206
2207 /* endian macros */
2208 #if !defined(BE_16) || !defined(BE_32) || !defined(LE_16) || !defined(LE_32)
2209 #define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
2210 #define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
2211 (((uint8_t*)(x))[1] << 16) | \
2212 (((uint8_t*)(x))[2] << 8) | \
2213 ((uint8_t*)(x))[3])
2214 #define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
2215 #define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \
2216 (((uint8_t*)(x))[2] << 16) | \
2217 (((uint8_t*)(x))[1] << 8) | \
2218 ((uint8_t*)(x))[0])
2219 #endif
2220
2221 #ifdef __cplusplus
2222 }
2223 #endif
2224
2225 #endif /* AVCODEC_H */