21966a803a0679086bae20ea0a72a90968cd60a8
[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 0x000408
19 #define FFMPEG_VERSION "0.4.8"
20 #define LIBAVCODEC_BUILD 4715
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_H263,
38 CODEC_ID_RV10,
39 CODEC_ID_RV20,
40 CODEC_ID_MP2,
41 CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
42 CODEC_ID_VORBIS,
43 CODEC_ID_AC3,
44 CODEC_ID_MJPEG,
45 CODEC_ID_MJPEGB,
46 CODEC_ID_LJPEG,
47 CODEC_ID_SP5X,
48 CODEC_ID_MPEG4,
49 CODEC_ID_RAWVIDEO,
50 CODEC_ID_MSMPEG4V1,
51 CODEC_ID_MSMPEG4V2,
52 CODEC_ID_MSMPEG4V3,
53 CODEC_ID_WMV1,
54 CODEC_ID_WMV2,
55 CODEC_ID_H263P,
56 CODEC_ID_H263I,
57 CODEC_ID_FLV1,
58 CODEC_ID_SVQ1,
59 CODEC_ID_SVQ3,
60 CODEC_ID_DVVIDEO,
61 CODEC_ID_DVAUDIO,
62 CODEC_ID_WMAV1,
63 CODEC_ID_WMAV2,
64 CODEC_ID_MACE3,
65 CODEC_ID_MACE6,
66 CODEC_ID_HUFFYUV,
67 CODEC_ID_CYUV,
68 CODEC_ID_H264,
69 CODEC_ID_INDEO3,
70 CODEC_ID_VP3,
71 CODEC_ID_THEORA,
72 CODEC_ID_AAC,
73 CODEC_ID_MPEG4AAC,
74 CODEC_ID_ASV1,
75 CODEC_ID_ASV2,
76 CODEC_ID_FFV1,
77 CODEC_ID_4XM,
78 CODEC_ID_VCR1,
79 CODEC_ID_CLJR,
80 CODEC_ID_MDEC,
81 CODEC_ID_ROQ,
82 CODEC_ID_INTERPLAY_VIDEO,
83 CODEC_ID_XAN_WC3,
84 CODEC_ID_XAN_WC4,
85 CODEC_ID_RPZA,
86 CODEC_ID_CINEPAK,
87 CODEC_ID_WS_VQA,
88 CODEC_ID_MSRLE,
89 CODEC_ID_MSVIDEO1,
90 CODEC_ID_IDCIN,
91 CODEC_ID_8BPS,
92 CODEC_ID_SMC,
93 CODEC_ID_FLIC,
94 CODEC_ID_TRUEMOTION1,
95 CODEC_ID_VMDVIDEO,
96 CODEC_ID_VMDAUDIO,
97 CODEC_ID_MSZH,
98 CODEC_ID_ZLIB,
99 CODEC_ID_QTRLE,
100
101 /* various pcm "codecs" */
102 CODEC_ID_PCM_S16LE,
103 CODEC_ID_PCM_S16BE,
104 CODEC_ID_PCM_U16LE,
105 CODEC_ID_PCM_U16BE,
106 CODEC_ID_PCM_S8,
107 CODEC_ID_PCM_U8,
108 CODEC_ID_PCM_MULAW,
109 CODEC_ID_PCM_ALAW,
110
111 /* various adpcm codecs */
112 CODEC_ID_ADPCM_IMA_QT,
113 CODEC_ID_ADPCM_IMA_WAV,
114 CODEC_ID_ADPCM_IMA_DK3,
115 CODEC_ID_ADPCM_IMA_DK4,
116 CODEC_ID_ADPCM_IMA_WS,
117 CODEC_ID_ADPCM_IMA_SMJPEG,
118 CODEC_ID_ADPCM_MS,
119 CODEC_ID_ADPCM_4XM,
120 CODEC_ID_ADPCM_XA,
121 CODEC_ID_ADPCM_ADX,
122 CODEC_ID_ADPCM_EA,
123 CODEC_ID_ADPCM_G726,
124
125 /* AMR */
126 CODEC_ID_AMR_NB,
127 CODEC_ID_AMR_WB,
128
129 /* RealAudio codecs*/
130 CODEC_ID_RA_144,
131 CODEC_ID_RA_288,
132
133 /* various DPCM codecs */
134 CODEC_ID_ROQ_DPCM,
135 CODEC_ID_INTERPLAY_DPCM,
136 CODEC_ID_XAN_DPCM,
137
138 CODEC_ID_FLAC,
139
140 CODEC_ID_MPEG2TS, /* _FAKE_ codec to indicate a raw MPEG2 transport
141 stream (only used by libavformat) */
142 };
143
144 /* CODEC_ID_MP3LAME is absolete */
145 #define CODEC_ID_MP3LAME CODEC_ID_MP3
146
147 enum CodecType {
148 CODEC_TYPE_UNKNOWN = -1,
149 CODEC_TYPE_VIDEO,
150 CODEC_TYPE_AUDIO,
151 CODEC_TYPE_DATA,
152 };
153
154 /**
155 * Pixel format. Notes:
156 *
157 * PIX_FMT_RGBA32 is handled in an endian-specific manner. A RGBA
158 * color is put together as:
159 * (A << 24) | (R << 16) | (G << 8) | B
160 * This is stored as BGRA on little endian CPU architectures and ARGB on
161 * big endian CPUs.
162 *
163 * When the pixel format is palettized RGB (PIX_FMT_PAL8), the palettized
164 * image data is stored in AVFrame.data[0]. The palette is transported in
165 * AVFrame.data[1] and, is 1024 bytes long (256 4-byte entries) and is
166 * formatted the same as in PIX_FMT_RGBA32 described above (i.e., it is
167 * also endian-specific). Note also that the individual RGB palette
168 * components stored in AVFrame.data[1] should be in the range 0..255.
169 * This is important as many custom PAL8 video codecs that were designed
170 * to run on the IBM VGA graphics adapter use 6-bit palette components.
171 */
172 enum PixelFormat {
173 PIX_FMT_YUV420P, ///< Planar YUV 4:2:0 (1 Cr & Cb sample per 2x2 Y samples)
174 PIX_FMT_YUV422,
175 PIX_FMT_RGB24, ///< Packed pixel, 3 bytes per pixel, RGBRGB...
176 PIX_FMT_BGR24, ///< Packed pixel, 3 bytes per pixel, BGRBGR...
177 PIX_FMT_YUV422P, ///< Planar YUV 4:2:2 (1 Cr & Cb sample per 2x1 Y samples)
178 PIX_FMT_YUV444P, ///< Planar YUV 4:4:4 (1 Cr & Cb sample per 1x1 Y samples)
179 PIX_FMT_RGBA32, ///< Packed pixel, 4 bytes per pixel, BGRABGRA..., stored in cpu endianness
180 PIX_FMT_YUV410P, ///< Planar YUV 4:1:0 (1 Cr & Cb sample per 4x4 Y samples)
181 PIX_FMT_YUV411P, ///< Planar YUV 4:1:1 (1 Cr & Cb sample per 4x1 Y samples)
182 PIX_FMT_RGB565, ///< always stored in cpu endianness
183 PIX_FMT_RGB555, ///< always stored in cpu endianness, most significant bit to 1
184 PIX_FMT_GRAY8,
185 PIX_FMT_MONOWHITE, ///< 0 is white
186 PIX_FMT_MONOBLACK, ///< 0 is black
187 PIX_FMT_PAL8, ///< 8 bit with RGBA palette
188 PIX_FMT_YUVJ420P, ///< Planar YUV 4:2:0 full scale (jpeg)
189 PIX_FMT_YUVJ422P, ///< Planar YUV 4:2:2 full scale (jpeg)
190 PIX_FMT_YUVJ444P, ///< Planar YUV 4:4:4 full scale (jpeg)
191 PIX_FMT_XVMC_MPEG2_MC,///< XVideo Motion Acceleration via common packet passing(xvmc_render.h)
192 PIX_FMT_XVMC_MPEG2_IDCT,
193 PIX_FMT_NB,
194 };
195
196 /* currently unused, may be used if 24/32 bits samples ever supported */
197 enum SampleFormat {
198 SAMPLE_FMT_S16 = 0, ///< signed 16 bits
199 };
200
201 /* in bytes */
202 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 131072
203
204 /**
205 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
206 * this is mainly needed because some optimized bitstream readers read
207 * 32 or 64 bit at once and could read over the end<br>
208 * Note, if the first 23 bits of the additional bytes are not 0 then damaged
209 * MPEG bitstreams could cause overread and segfault
210 */
211 #define FF_INPUT_BUFFER_PADDING_SIZE 8
212
213 /* motion estimation type, EPZS by default */
214 enum Motion_Est_ID {
215 ME_ZERO = 1,
216 ME_FULL,
217 ME_LOG,
218 ME_PHODS,
219 ME_EPZS,
220 ME_X1
221 };
222
223 typedef struct RcOverride{
224 int start_frame;
225 int end_frame;
226 int qscale; // if this is 0 then quality_factor will be used instead
227 float quality_factor;
228 } RcOverride;
229
230 /* only for ME compatiblity with old apps */
231 extern int motion_estimation_method;
232
233 #define FF_MAX_B_FRAMES 8
234
235 /* encoding support
236 these flags can be passed in AVCodecContext.flags before initing
237 Note: note not everything is supported yet
238 */
239
240 #define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
241 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / Advanced prediction for H263
242 #define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
243 #define CODEC_FLAG_GMC 0x0020 ///< use GMC
244 #define CODEC_FLAG_MV0 0x0040 ///< always try a MB with MV=<0,0>
245 #define CODEC_FLAG_PART 0x0080 ///< use data partitioning
246 /* parent program gurantees that the input for b-frame containing streams is not written to
247 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
248 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
249 #define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
250 #define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
251 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
252 #define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
253 #define CODEC_FLAG_EMU_EDGE 0x4000///< dont draw edges
254 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
255 #define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
256 of only at frame boundaries */
257 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
258 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
259 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay
260 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
261 #define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
262 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
263 #define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
264 /* Fx : Flag for h263+ extra options */
265 #define CODEC_FLAG_H263P_AIC 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
266 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
267 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
268 #define CODEC_FLAG_CBP_RD 0x04000000 ///< use rate distortion optimization for cbp
269 #define CODEC_FLAG_QP_RD 0x08000000 ///< use rate distortion optimization for qp selectioon
270 #define CODEC_FLAG_H263P_AIV 0x00000008 ///< H263 Alternative inter vlc
271 #define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
272 #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
273 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
274 #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
275 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
276 #define CODEC_FLAG_CLOSED_GOP 0x80000000
277 /* Unsupported options :
278 * Syntax Arithmetic coding (SAC)
279 * Reference Picture Selection
280 * Independant Segment Decoding */
281 /* /Fx */
282 /* codec capabilities */
283
284 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
285 /**
286 * Codec uses get_buffer() for allocating buffers.
287 * direct rendering method 1
288 */
289 #define CODEC_CAP_DR1 0x0002
290 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
291 used */
292 #define CODEC_CAP_PARSE_ONLY 0x0004
293 #define CODEC_CAP_TRUNCATED 0x0008
294 /* codec can export data for HW decoding (XvMC) */
295 #define CODEC_CAP_HWACCEL 0x0010
296
297 //the following defines might change, so dont expect compatibility if u use them
298 #define MB_TYPE_INTRA4x4 0x0001
299 #define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
300 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME h264 specific
301 #define MB_TYPE_16x16 0x0008
302 #define MB_TYPE_16x8 0x0010
303 #define MB_TYPE_8x16 0x0020
304 #define MB_TYPE_8x8 0x0040
305 #define MB_TYPE_INTERLACED 0x0080
306 #define MB_TYPE_DIRECT2 0x0100 //FIXME
307 #define MB_TYPE_ACPRED 0x0200
308 #define MB_TYPE_GMC 0x0400
309 #define MB_TYPE_SKIP 0x0800
310 #define MB_TYPE_P0L0 0x1000
311 #define MB_TYPE_P1L0 0x2000
312 #define MB_TYPE_P0L1 0x4000
313 #define MB_TYPE_P1L1 0x8000
314 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
315 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
316 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
317 #define MB_TYPE_QUANT 0x00010000
318 #define MB_TYPE_CBP 0x00020000
319 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
320
321 /**
322 * Pan Scan area.
323 * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
324 */
325 typedef struct AVPanScan{
326 /**
327 * id.
328 * - encoding: set by user.
329 * - decoding: set by lavc
330 */
331 int id;
332
333 /**
334 * width and height in 1/16 pel
335 * - encoding: set by user.
336 * - decoding: set by lavc
337 */
338 int width;
339 int height;
340
341 /**
342 * position of the top left corner in 1/16 pel for up to 3 fields/frames.
343 * - encoding: set by user.
344 * - decoding: set by lavc
345 */
346 int16_t position[3][2];
347 }AVPanScan;
348
349 #define FF_COMMON_FRAME \
350 /**\
351 * pointer to the picture planes.\
352 * this might be different from the first allocated byte\
353 * - encoding: \
354 * - decoding: \
355 */\
356 uint8_t *data[4];\
357 int linesize[4];\
358 /**\
359 * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
360 * this isnt used by lavc unless the default get/release_buffer() is used\
361 * - encoding: \
362 * - decoding: \
363 */\
364 uint8_t *base[4];\
365 /**\
366 * 1 -> keyframe, 0-> not\
367 * - encoding: set by lavc\
368 * - decoding: set by lavc\
369 */\
370 int key_frame;\
371 \
372 /**\
373 * picture type of the frame, see ?_TYPE below.\
374 * - encoding: set by lavc for coded_picture (and set by user for input)\
375 * - decoding: set by lavc\
376 */\
377 int pict_type;\
378 \
379 /**\
380 * presentation timestamp in AV_TIME_BASE (=micro seconds currently) (time when frame should be shown to user)\
381 * if AV_NOPTS_VALUE then the frame_rate will be used as reference\
382 * - encoding: MUST be set by user\
383 * - decoding: set by lavc\
384 */\
385 int64_t pts;\
386 \
387 /**\
388 * picture number in bitstream order.\
389 * - encoding: set by\
390 * - decoding: set by lavc\
391 */\
392 int coded_picture_number;\
393 /**\
394 * picture number in display order.\
395 * - encoding: set by\
396 * - decoding: set by lavc\
397 */\
398 int display_picture_number;\
399 \
400 /**\
401 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
402 * - encoding: set by lavc for coded_picture (and set by user for input)\
403 * - decoding: set by lavc\
404 */\
405 int quality; \
406 \
407 /**\
408 * buffer age (1->was last buffer and dint change, 2->..., ...).\
409 * set to INT_MAX if the buffer has not been used yet \
410 * - encoding: unused\
411 * - decoding: MUST be set by get_buffer()\
412 */\
413 int age;\
414 \
415 /**\
416 * is this picture used as reference\
417 * - encoding: unused\
418 * - decoding: set by lavc (before get_buffer() call))\
419 */\
420 int reference;\
421 \
422 /**\
423 * QP table\
424 * - encoding: unused\
425 * - decoding: set by lavc\
426 */\
427 int8_t *qscale_table;\
428 /**\
429 * QP store stride\
430 * - encoding: unused\
431 * - decoding: set by lavc\
432 */\
433 int qstride;\
434 \
435 /**\
436 * mbskip_table[mb]>=1 if MB didnt change\
437 * stride= mb_width = (width+15)>>4\
438 * - encoding: unused\
439 * - decoding: set by lavc\
440 */\
441 uint8_t *mbskip_table;\
442 \
443 /**\
444 * Motion vector table\
445 * - encoding: set by user\
446 * - decoding: set by lavc\
447 */\
448 int16_t (*motion_val[2])[2];\
449 \
450 /**\
451 * Macroblock type table\
452 * mb_type_base + mb_width + 2\
453 * - encoding: set by user\
454 * - decoding: set by lavc\
455 */\
456 uint32_t *mb_type;\
457 \
458 /**\
459 * Macroblock size: (0->16x16, 1->8x8, 2-> 4x4, 3-> 2x2)\
460 * - encoding: unused\
461 * - decoding: set by lavc\
462 */\
463 uint8_t motion_subsample_log2;\
464 \
465 /**\
466 * for some private data of the user\
467 * - encoding: unused\
468 * - decoding: set by user\
469 */\
470 void *opaque;\
471 \
472 /**\
473 * error\
474 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
475 * - decoding: unused\
476 */\
477 uint64_t error[4];\
478 \
479 /**\
480 * type of the buffer (to keep track of who has to dealloc data[*])\
481 * - encoding: set by the one who allocs it\
482 * - decoding: set by the one who allocs it\
483 * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
484 */\
485 int type;\
486 \
487 /**\
488 * when decoding, this signal how much the picture must be delayed.\
489 * extra_delay = repeat_pict / (2*fps)\
490 * - encoding: unused\
491 * - decoding: set by lavc\
492 */\
493 int repeat_pict;\
494 \
495 /**\
496 * \
497 */\
498 int qscale_type;\
499 \
500 /**\
501 * The content of the picture is interlaced.\
502 * - encoding: set by user\
503 * - decoding: set by lavc (default 0)\
504 */\
505 int interlaced_frame;\
506 \
507 /**\
508 * if the content is interlaced, is top field displayed first.\
509 * - encoding: set by user\
510 * - decoding: set by lavc\
511 */\
512 int top_field_first;\
513 \
514 /**\
515 * Pan scan.\
516 * - encoding: set by user\
517 * - decoding: set by lavc\
518 */\
519 AVPanScan *pan_scan;\
520 \
521 /**\
522 * tell user application that palette has changed from previous frame.\
523 * - encoding: ??? (no palette-enabled encoder yet)\
524 * - decoding: set by lavc (default 0)\
525 */\
526 int palette_has_changed;\
527 \
528 /**\
529 * Codec suggestion on buffer type if != 0\
530 * - encoding: unused\
531 * - decoding: set by lavc (before get_buffer() call))\
532 */\
533 int buffer_hints;\
534 \
535 /**\
536 * DCT coeffitients\
537 * - encoding: unused\
538 * - decoding: set by lavc\
539 */\
540 short *dct_coeff;\
541 \
542 /**\
543 * Motion referece frame index\
544 * - encoding: set by user\
545 * - decoding: set by lavc\
546 */\
547 int8_t *ref_index[2];
548
549 #define FF_QSCALE_TYPE_MPEG1 0
550 #define FF_QSCALE_TYPE_MPEG2 1
551
552 #define FF_BUFFER_TYPE_INTERNAL 1
553 #define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
554 #define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewher else, dont dealloc image (data/base), all other tables are not shared
555 #define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, dont dealloc anything
556
557
558 #define FF_I_TYPE 1 // Intra
559 #define FF_P_TYPE 2 // Predicted
560 #define FF_B_TYPE 3 // Bi-dir predicted
561 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
562 #define FF_SI_TYPE 5
563 #define FF_SP_TYPE 6
564
565 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore)
566 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
567 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
568 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
569
570 /**
571 * Audio Video Frame.
572 */
573 typedef struct AVFrame {
574 FF_COMMON_FRAME
575 } AVFrame;
576
577 #define DEFAULT_FRAME_RATE_BASE 1001000
578
579 /**
580 * Used by av_log
581 */
582 typedef struct AVCLASS AVClass;
583 struct AVCLASS {
584 const char* class_name;
585 const char* (*item_name)(void*); /* actually passing a pointer to an AVCodecContext
586 or AVFormatContext, which begin with an AVClass.
587 Needed because av_log is in libavcodec and has no visibility
588 of AVIn/OutputFormat */
589 };
590
591 /**
592 * main external api structure.
593 */
594 typedef struct AVCodecContext {
595 /**
596 * Info on struct for av_log
597 * - set by avcodec_alloc_context
598 */
599 AVClass *av_class;
600 /**
601 * the average bitrate.
602 * - encoding: set by user. unused for constant quantizer encoding
603 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
604 */
605 int bit_rate;
606
607 /**
608 * number of bits the bitstream is allowed to diverge from the reference.
609 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
610 * - encoding: set by user. unused for constant quantizer encoding
611 * - decoding: unused
612 */
613 int bit_rate_tolerance;
614
615 /**
616 * CODEC_FLAG_*.
617 * - encoding: set by user.
618 * - decoding: set by user.
619 */
620 int flags;
621
622 /**
623 * some codecs needs additionnal format info. It is stored here
624 * - encoding: set by user.
625 * - decoding: set by lavc. (FIXME is this ok?)
626 */
627 int sub_id;
628
629 /**
630 * motion estimation algorithm used for video coding.
631 * - encoding: MUST be set by user.
632 * - decoding: unused
633 */
634 int me_method;
635
636 /**
637 * some codecs need / can use extra-data like huffman tables.
638 * mjpeg: huffman tables
639 * rv10: additional flags
640 * mpeg4: global headers (they can be in the bitstream or here)
641 * - encoding: set/allocated/freed by lavc.
642 * - decoding: set/allocated/freed by user.
643 */
644 void *extradata;
645 int extradata_size;
646
647 /* video only */
648 /**
649 * frames per sec multiplied by frame_rate_base.
650 * for variable fps this is the precission, so if the timestamps
651 * can be specified in msec precssion then this is 1000*frame_rate_base
652 * - encoding: MUST be set by user
653 * - decoding: set by lavc. 0 or the frame_rate if available
654 */
655 int frame_rate;
656
657 /**
658 * width / height.
659 * - encoding: MUST be set by user.
660 * - decoding: set by user if known, codec should override / dynamically change if needed
661 */
662 int width, height;
663
664 #define FF_ASPECT_EXTENDED 15
665
666 /**
667 * the number of pictures in a group of pitures, or 0 for intra_only.
668 * - encoding: set by user.
669 * - decoding: unused
670 */
671 int gop_size;
672
673 /**
674 * pixel format, see PIX_FMT_xxx.
675 * - encoding: FIXME: used by ffmpeg to decide whether an pix_fmt
676 * conversion is in order. This only works for
677 * codecs with one supported pix_fmt, we should
678 * do something for a generic case as well.
679 * - decoding: set by lavc.
680 */
681 enum PixelFormat pix_fmt;
682
683 /**
684 * Frame rate emulation. If not zero lower layer (i.e. format handler)
685 * has to read frames at native frame rate.
686 * - encoding: set by user.
687 * - decoding: unused.
688 */
689 int rate_emu;
690
691 /**
692 * if non NULL, 'draw_horiz_band' is called by the libavcodec
693 * decoder to draw an horizontal band. It improve cache usage. Not
694 * all codecs can do that. You must check the codec capabilities
695 * before
696 * - encoding: unused
697 * - decoding: set by user.
698 * @param height the height of the slice
699 * @param y the y position of the slice
700 * @param type 1->top field, 2->bottom field, 3->frame
701 * @param offset offset into the AVFrame.data from which the slice should be read
702 */
703 void (*draw_horiz_band)(struct AVCodecContext *s,
704 const AVFrame *src, int offset[4],
705 int y, int type, int height);
706
707 /* audio only */
708 int sample_rate; ///< samples per sec
709 int channels;
710 int sample_fmt; ///< sample format, currenly unused
711
712 /* the following data should not be initialized */
713 int frame_size; ///< in samples, initialized when calling 'init'
714 int frame_number; ///< audio or video frame number
715 int real_pict_num; ///< returns the real picture number of previous encoded frame
716
717 /**
718 * number of frames the decoded output will be delayed relative to
719 * the encoded input.
720 * - encoding: set by lavc.
721 * - decoding: unused
722 */
723 int delay;
724
725 /* - encoding parameters */
726 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
727 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
728
729 /**
730 * minimum quantizer.
731 * - encoding: set by user.
732 * - decoding: unused
733 */
734 int qmin;
735
736 /**
737 * maximum quantizer.
738 * - encoding: set by user.
739 * - decoding: unused
740 */
741 int qmax;
742
743 /**
744 * maximum quantizer difference etween frames.
745 * - encoding: set by user.
746 * - decoding: unused
747 */
748 int max_qdiff;
749
750 /**
751 * maximum number of b frames between non b frames.
752 * note: the output will be delayed by max_b_frames+1 relative to the input
753 * - encoding: set by user.
754 * - decoding: unused
755 */
756 int max_b_frames;
757
758 /**
759 * qscale factor between ip and b frames.
760 * - encoding: set by user.
761 * - decoding: unused
762 */
763 float b_quant_factor;
764
765 /** obsolete FIXME remove */
766 int rc_strategy;
767 int b_frame_strategy;
768
769 /**
770 * hurry up amount.
771 * - encoding: unused
772 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
773 */
774 int hurry_up;
775
776 struct AVCodec *codec;
777
778 void *priv_data;
779
780 /* unused, FIXME remove*/
781 int rtp_mode;
782
783 int rtp_payload_size; /* The size of the RTP payload, the coder will */
784 /* do it's best to deliver a chunk with size */
785 /* below rtp_payload_size, the chunk will start */
786 /* with a start code on some codecs like H.263 */
787 /* This doesn't take account of any particular */
788 /* headers inside the transmited RTP payload */
789
790
791 /* The RTP callcack: This function is called */
792 /* every time the encoder as a packet to send */
793 /* Depends on the encoder if the data starts */
794 /* with a Start Code (it should) H.263 does */
795 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int packet_number);
796
797 /* statistics, used for 2-pass encoding */
798 int mv_bits;
799 int header_bits;
800 int i_tex_bits;
801 int p_tex_bits;
802 int i_count;
803 int p_count;
804 int skip_count;
805 int misc_bits;
806
807 /**
808 * number of bits used for the previously encoded frame.
809 * - encoding: set by lavc
810 * - decoding: unused
811 */
812 int frame_bits;
813
814 /**
815 * private data of the user, can be used to carry app specific stuff.
816 * - encoding: set by user
817 * - decoding: set by user
818 */
819 void *opaque;
820
821 char codec_name[32];
822 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
823 enum CodecID codec_id; /* see CODEC_ID_xxx */
824
825 /**
826 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
827 * this is used to workaround some encoder bugs
828 * - encoding: set by user, if not then the default based on codec_id will be used
829 * - decoding: set by user, will be converted to upper case by lavc during init
830 */
831 unsigned int codec_tag;
832
833 /**
834 * workaround bugs in encoders which sometimes cannot be detected automatically.
835 * - encoding: unused
836 * - decoding: set by user
837 */
838 int workaround_bugs;
839 #define FF_BUG_AUTODETECT 1 ///< autodetection
840 #define FF_BUG_OLD_MSMPEG4 2
841 #define FF_BUG_XVID_ILACE 4
842 #define FF_BUG_UMP4 8
843 #define FF_BUG_NO_PADDING 16
844 #define FF_BUG_AMV 32
845 #define FF_BUG_AC_VLC 0 ///< will be removed, libavcodec can now handle these non compliant files by default
846 #define FF_BUG_QPEL_CHROMA 64
847 #define FF_BUG_STD_QPEL 128
848 #define FF_BUG_QPEL_CHROMA2 256
849 #define FF_BUG_DIRECT_BLOCKSIZE 512
850 #define FF_BUG_EDGE 1024
851 #define FF_BUG_HPEL_CHROMA 2048
852 #define FF_BUG_DC_CLIP 4096
853 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
854
855 /**
856 * luma single coeff elimination threshold.
857 * - encoding: set by user
858 * - decoding: unused
859 */
860 int luma_elim_threshold;
861
862 /**
863 * chroma single coeff elimination threshold.
864 * - encoding: set by user
865 * - decoding: unused
866 */
867 int chroma_elim_threshold;
868
869 /**
870 * strictly follow the std (MPEG4, ...).
871 * - encoding: set by user
872 * - decoding: unused
873 */
874 int strict_std_compliance;
875
876 /**
877 * qscale offset between ip and b frames.
878 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
879 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
880 * - encoding: set by user.
881 * - decoding: unused
882 */
883 float b_quant_offset;
884
885 /**
886 * error resilience higher values will detect more errors but may missdetect
887 * some more or less valid parts as errors.
888 * - encoding: unused
889 * - decoding: set by user
890 */
891 int error_resilience;
892 #define FF_ER_CAREFULL 1
893 #define FF_ER_COMPLIANT 2
894 #define FF_ER_AGGRESSIVE 3
895 #define FF_ER_VERY_AGGRESSIVE 4
896
897 /**
898 * called at the beginning of each frame to get a buffer for it.
899 * if pic.reference is set then the frame will be read later by lavc
900 * avcodec_align_dimensions() should be used to find the required width and
901 * height, as they normally need to be rounded up to the next multiple of 16
902 * - encoding: unused
903 * - decoding: set by lavc, user can override
904 */
905 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
906
907 /**
908 * called to release buffers which where allocated with get_buffer.
909 * a released buffer can be reused in get_buffer()
910 * pic.data[*] must be set to NULL
911 * - encoding: unused
912 * - decoding: set by lavc, user can override
913 */
914 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
915
916 /**
917 * is 1 if the decoded stream contains b frames, 0 otherwise.
918 * - encoding: unused
919 * - decoding: set by lavc
920 */
921 int has_b_frames;
922
923 int block_align; ///< used by some WAV based audio codecs
924
925 int parse_only; /* - decoding only: if true, only parsing is done
926 (function avcodec_parse_frame()). The frame
927 data is returned. Only MPEG codecs support this now. */
928
929 /**
930 * 0-> h263 quant 1-> mpeg quant.
931 * - encoding: set by user.
932 * - decoding: unused
933 */
934 int mpeg_quant;
935
936 /**
937 * pass1 encoding statistics output buffer.
938 * - encoding: set by lavc
939 * - decoding: unused
940 */
941 char *stats_out;
942
943 /**
944 * pass2 encoding statistics input buffer.
945 * concatenated stuff from stats_out of pass1 should be placed here
946 * - encoding: allocated/set/freed by user
947 * - decoding: unused
948 */
949 char *stats_in;
950
951 /**
952 * ratecontrol qmin qmax limiting method.
953 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
954 * - encoding: set by user.
955 * - decoding: unused
956 */
957 float rc_qsquish;
958
959 float rc_qmod_amp;
960 int rc_qmod_freq;
961
962 /**
963 * ratecontrol override, see RcOverride.
964 * - encoding: allocated/set/freed by user.
965 * - decoding: unused
966 */
967 RcOverride *rc_override;
968 int rc_override_count;
969
970 /**
971 * rate control equation.
972 * - encoding: set by user
973 * - decoding: unused
974 */
975 char *rc_eq;
976
977 /**
978 * maximum bitrate.
979 * - encoding: set by user.
980 * - decoding: unused
981 */
982 int rc_max_rate;
983
984 /**
985 * minimum bitrate.
986 * - encoding: set by user.
987 * - decoding: unused
988 */
989 int rc_min_rate;
990
991 /**
992 * decoder bitstream buffer size.
993 * - encoding: set by user.
994 * - decoding: unused
995 */
996 int rc_buffer_size;
997 float rc_buffer_aggressivity;
998
999 /**
1000 * qscale factor between p and i frames.
1001 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1002 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1003 * - encoding: set by user.
1004 * - decoding: unused
1005 */
1006 float i_quant_factor;
1007
1008 /**
1009 * qscale offset between p and i frames.
1010 * - encoding: set by user.
1011 * - decoding: unused
1012 */
1013 float i_quant_offset;
1014
1015 /**
1016 * initial complexity for pass1 ratecontrol.
1017 * - encoding: set by user.
1018 * - decoding: unused
1019 */
1020 float rc_initial_cplx;
1021
1022 /**
1023 * dct algorithm, see FF_DCT_* below.
1024 * - encoding: set by user
1025 * - decoding: unused
1026 */
1027 int dct_algo;
1028 #define FF_DCT_AUTO 0
1029 #define FF_DCT_FASTINT 1
1030 #define FF_DCT_INT 2
1031 #define FF_DCT_MMX 3
1032 #define FF_DCT_MLIB 4
1033 #define FF_DCT_ALTIVEC 5
1034 #define FF_DCT_FAAN 6
1035
1036 /**
1037 * luminance masking (0-> disabled).
1038 * - encoding: set by user
1039 * - decoding: unused
1040 */
1041 float lumi_masking;
1042
1043 /**
1044 * temporary complexity masking (0-> disabled).
1045 * - encoding: set by user
1046 * - decoding: unused
1047 */
1048 float temporal_cplx_masking;
1049
1050 /**
1051 * spatial complexity masking (0-> disabled).
1052 * - encoding: set by user
1053 * - decoding: unused
1054 */
1055 float spatial_cplx_masking;
1056
1057 /**
1058 * p block masking (0-> disabled).
1059 * - encoding: set by user
1060 * - decoding: unused
1061 */
1062 float p_masking;
1063
1064 /**
1065 * darkness masking (0-> disabled).
1066 * - encoding: set by user
1067 * - decoding: unused
1068 */
1069 float dark_masking;
1070
1071
1072 /* for binary compatibility */
1073 int unused;
1074
1075 /**
1076 * idct algorithm, see FF_IDCT_* below.
1077 * - encoding: set by user
1078 * - decoding: set by user
1079 */
1080 int idct_algo;
1081 #define FF_IDCT_AUTO 0
1082 #define FF_IDCT_INT 1
1083 #define FF_IDCT_SIMPLE 2
1084 #define FF_IDCT_SIMPLEMMX 3
1085 #define FF_IDCT_LIBMPEG2MMX 4
1086 #define FF_IDCT_PS2 5
1087 #define FF_IDCT_MLIB 6
1088 #define FF_IDCT_ARM 7
1089 #define FF_IDCT_ALTIVEC 8
1090 #define FF_IDCT_SH4 9
1091 #define FF_IDCT_SIMPLEARM 10
1092
1093 /**
1094 * slice count.
1095 * - encoding: set by lavc
1096 * - decoding: set by user (or 0)
1097 */
1098 int slice_count;
1099 /**
1100 * slice offsets in the frame in bytes.
1101 * - encoding: set/allocated by lavc
1102 * - decoding: set/allocated by user (or NULL)
1103 */
1104 int *slice_offset;
1105
1106 /**
1107 * error concealment flags.
1108 * - encoding: unused
1109 * - decoding: set by user
1110 */
1111 int error_concealment;
1112 #define FF_EC_GUESS_MVS 1
1113 #define FF_EC_DEBLOCK 2
1114
1115 /**
1116 * dsp_mask could be add used to disable unwanted CPU features
1117 * CPU features (i.e. MMX, SSE. ...)
1118 *
1119 * with FORCE flag you may instead enable given CPU features
1120 * (Dangerous: usable in case of misdetection, improper usage however will
1121 * result into program crash)
1122 */
1123 unsigned dsp_mask;
1124 #define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
1125 /* lower 16 bits - CPU features */
1126 #ifdef HAVE_MMX
1127 #define FF_MM_MMX 0x0001 /* standard MMX */
1128 #define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
1129 #define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
1130 #define FF_MM_SSE 0x0008 /* SSE functions */
1131 #define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
1132 #endif /* HAVE_MMX */
1133
1134 /**
1135 * bits per sample/pixel from the demuxer (needed for huffyuv).
1136 * - encoding: set by lavc
1137 * - decoding: set by user
1138 */
1139 int bits_per_sample;
1140
1141 /**
1142 * prediction method (needed for huffyuv).
1143 * - encoding: set by user
1144 * - decoding: unused
1145 */
1146 int prediction_method;
1147 #define FF_PRED_LEFT 0
1148 #define FF_PRED_PLANE 1
1149 #define FF_PRED_MEDIAN 2
1150
1151 /**
1152 * sample aspect ratio (0 if unknown).
1153 * numerator and denominator must be relative prime and smaller then 256 for some video standards
1154 * - encoding: set by user.
1155 * - decoding: set by lavc.
1156 */
1157 AVRational sample_aspect_ratio;
1158
1159 /**
1160 * the picture in the bitstream.
1161 * - encoding: set by lavc
1162 * - decoding: set by lavc
1163 */
1164 AVFrame *coded_frame;
1165
1166 /**
1167 * debug.
1168 * - encoding: set by user.
1169 * - decoding: set by user.
1170 */
1171 int debug;
1172 #define FF_DEBUG_PICT_INFO 1
1173 #define FF_DEBUG_RC 2
1174 #define FF_DEBUG_BITSTREAM 4
1175 #define FF_DEBUG_MB_TYPE 8
1176 #define FF_DEBUG_QP 16
1177 #define FF_DEBUG_MV 32
1178 #define FF_DEBUG_DCT_COEFF 0x00000040
1179 #define FF_DEBUG_SKIP 0x00000080
1180 #define FF_DEBUG_STARTCODE 0x00000100
1181 #define FF_DEBUG_PTS 0x00000200
1182 #define FF_DEBUG_ER 0x00000400
1183 #define FF_DEBUG_MMCO 0x00000800
1184 #define FF_DEBUG_BUGS 0x00001000
1185 #define FF_DEBUG_VIS_QP 0x00002000
1186 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1187
1188 /**
1189 * debug.
1190 * - encoding: set by user.
1191 * - decoding: set by user.
1192 */
1193 int debug_mv;
1194 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1195 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1196 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1197
1198 /**
1199 * error.
1200 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1201 * - decoding: unused
1202 */
1203 uint64_t error[4];
1204
1205 /**
1206 * minimum MB quantizer.
1207 * - encoding: set by user.
1208 * - decoding: unused
1209 */
1210 int mb_qmin;
1211
1212 /**
1213 * maximum MB quantizer.
1214 * - encoding: set by user.
1215 * - decoding: unused
1216 */
1217 int mb_qmax;
1218
1219 /**
1220 * motion estimation compare function.
1221 * - encoding: set by user.
1222 * - decoding: unused
1223 */
1224 int me_cmp;
1225 /**
1226 * subpixel motion estimation compare function.
1227 * - encoding: set by user.
1228 * - decoding: unused
1229 */
1230 int me_sub_cmp;
1231 /**
1232 * macroblock compare function (not supported yet).
1233 * - encoding: set by user.
1234 * - decoding: unused
1235 */
1236 int mb_cmp;
1237 /**
1238 * interlaced dct compare function
1239 * - encoding: set by user.
1240 * - decoding: unused
1241 */
1242 int ildct_cmp;
1243 #define FF_CMP_SAD 0
1244 #define FF_CMP_SSE 1
1245 #define FF_CMP_SATD 2
1246 #define FF_CMP_DCT 3
1247 #define FF_CMP_PSNR 4
1248 #define FF_CMP_BIT 5
1249 #define FF_CMP_RD 6
1250 #define FF_CMP_ZERO 7
1251 #define FF_CMP_VSAD 8
1252 #define FF_CMP_VSSE 9
1253 #define FF_CMP_CHROMA 256
1254
1255 /**
1256 * ME diamond size & shape.
1257 * - encoding: set by user.
1258 * - decoding: unused
1259 */
1260 int dia_size;
1261
1262 /**
1263 * amount of previous MV predictors (2a+1 x 2a+1 square).
1264 * - encoding: set by user.
1265 * - decoding: unused
1266 */
1267 int last_predictor_count;
1268
1269 /**
1270 * pre pass for motion estimation.
1271 * - encoding: set by user.
1272 * - decoding: unused
1273 */
1274 int pre_me;
1275
1276 /**
1277 * motion estimation pre pass compare function.
1278 * - encoding: set by user.
1279 * - decoding: unused
1280 */
1281 int me_pre_cmp;
1282
1283 /**
1284 * ME pre pass diamond size & shape.
1285 * - encoding: set by user.
1286 * - decoding: unused
1287 */
1288 int pre_dia_size;
1289
1290 /**
1291 * subpel ME quality.
1292 * - encoding: set by user.
1293 * - decoding: unused
1294 */
1295 int me_subpel_quality;
1296
1297 /**
1298 * callback to negotiate the pixelFormat.
1299 * @param fmt is the list of formats which are supported by the codec,
1300 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1301 * the first is allways the native one
1302 * @return the choosen format
1303 * - encoding: unused
1304 * - decoding: set by user, if not set then the native format will always be choosen
1305 */
1306 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1307
1308 /**
1309 * DTG active format information (additionnal aspect ratio
1310 * information only used in DVB MPEG2 transport streams). 0 if
1311 * not set.
1312 *
1313 * - encoding: unused.
1314 * - decoding: set by decoder
1315 */
1316 int dtg_active_format;
1317 #define FF_DTG_AFD_SAME 8
1318 #define FF_DTG_AFD_4_3 9
1319 #define FF_DTG_AFD_16_9 10
1320 #define FF_DTG_AFD_14_9 11
1321 #define FF_DTG_AFD_4_3_SP_14_9 13
1322 #define FF_DTG_AFD_16_9_SP_14_9 14
1323 #define FF_DTG_AFD_SP_4_3 15
1324
1325 /**
1326 * Maximum motion estimation search range in subpel units.
1327 * if 0 then no limit
1328 *
1329 * - encoding: set by user.
1330 * - decoding: unused.
1331 */
1332 int me_range;
1333
1334 /**
1335 * frame_rate_base.
1336 * for variable fps this is 1
1337 * - encoding: set by user.
1338 * - decoding: set by lavc.
1339 * @todo move this after frame_rate
1340 */
1341
1342 int frame_rate_base;
1343 /**
1344 * intra quantizer bias.
1345 * - encoding: set by user.
1346 * - decoding: unused
1347 */
1348 int intra_quant_bias;
1349 #define FF_DEFAULT_QUANT_BIAS 999999
1350
1351 /**
1352 * inter quantizer bias.
1353 * - encoding: set by user.
1354 * - decoding: unused
1355 */
1356 int inter_quant_bias;
1357
1358 /**
1359 * color table ID.
1360 * - encoding: unused.
1361 * - decoding: which clrtable should be used for 8bit RGB images
1362 * table have to be stored somewhere FIXME
1363 */
1364 int color_table_id;
1365
1366 /**
1367 * internal_buffer count.
1368 * Dont touch, used by lavc default_get_buffer()
1369 */
1370 int internal_buffer_count;
1371
1372 /**
1373 * internal_buffers.
1374 * Dont touch, used by lavc default_get_buffer()
1375 */
1376 void *internal_buffer;
1377
1378 #define FF_LAMBDA_SHIFT 7
1379 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1380 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1381 #define FF_LAMBDA_MAX (256*128-1)
1382
1383 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1384 /**
1385 * global quality for codecs which cannot change it per frame.
1386 * this should be proportional to MPEG1/2/4 qscale.
1387 * - encoding: set by user.
1388 * - decoding: unused
1389 */
1390 int global_quality;
1391
1392 #define FF_CODER_TYPE_VLC 0
1393 #define FF_CODER_TYPE_AC 1
1394 /**
1395 * coder type
1396 * - encoding: set by user.
1397 * - decoding: unused
1398 */
1399 int coder_type;
1400
1401 /**
1402 * context model
1403 * - encoding: set by user.
1404 * - decoding: unused
1405 */
1406 int context_model;
1407
1408 /**
1409 * slice flags
1410 * - encoding: unused
1411 * - decoding: set by user.
1412 */
1413 int slice_flags;
1414 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1415 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1416 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1417
1418 /**
1419 * XVideo Motion Acceleration
1420 * - encoding: forbidden
1421 * - decoding: set by decoder
1422 */
1423 int xvmc_acceleration;
1424
1425 /**
1426 * macroblock decision mode
1427 * - encoding: set by user.
1428 * - decoding: unused
1429 */
1430 int mb_decision;
1431 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1432 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1433 #define FF_MB_DECISION_RD 2 ///< rate distoration
1434
1435 /**
1436 * custom intra quantization matrix
1437 * - encoding: set by user, can be NULL
1438 * - decoding: set by lavc
1439 */
1440 uint16_t *intra_matrix;
1441
1442 /**
1443 * custom inter quantization matrix
1444 * - encoding: set by user, can be NULL
1445 * - decoding: set by lavc
1446 */
1447 uint16_t *inter_matrix;
1448
1449 /**
1450 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1451 * this is used to workaround some encoder bugs
1452 * - encoding: unused
1453 * - decoding: set by user, will be converted to upper case by lavc during init
1454 */
1455 unsigned int stream_codec_tag;
1456
1457 /**
1458 * scene change detection threshold.
1459 * 0 is default, larger means fewer detected scene changes
1460 * - encoding: set by user.
1461 * - decoding: unused
1462 */
1463 int scenechange_threshold;
1464
1465 /**
1466 * minimum lagrange multipler
1467 * - encoding: set by user.
1468 * - decoding: unused
1469 */
1470 int lmin;
1471
1472 /**
1473 * maximum lagrange multipler
1474 * - encoding: set by user.
1475 * - decoding: unused
1476 */
1477 int lmax;
1478
1479 /**
1480 * Palette control structure
1481 * - encoding: ??? (no palette-enabled encoder yet)
1482 * - decoding: set by user.
1483 */
1484 struct AVPaletteControl *palctrl;
1485
1486 /**
1487 * noise reduction strength
1488 * - encoding: set by user.
1489 * - decoding: unused
1490 */
1491 int noise_reduction;
1492
1493 /**
1494 * called at the beginning of a frame to get cr buffer for it.
1495 * buffer type (size, hints) must be the same. lavc won't check it.
1496 * lavc will pass previous buffer in pic, function should return
1497 * same buffer or new buffer with old frame "painted" into it.
1498 * if pic.data[0] == NULL must behave like get_buffer().
1499 * - encoding: unused
1500 * - decoding: set by lavc, user can override
1501 */
1502 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1503
1504 /**
1505 * number of bits which should be loaded into the rc buffer before decoding starts
1506 * - encoding: set by user.
1507 * - decoding: unused
1508 */
1509 int rc_initial_buffer_occupancy;
1510
1511 /**
1512 *
1513 * - encoding: set by user.
1514 * - decoding: unused
1515 */
1516 int inter_threshold;
1517
1518 /**
1519 * CODEC_FLAG2_*.
1520 * - encoding: set by user.
1521 * - decoding: set by user.
1522 */
1523 int flags2;
1524
1525 /**
1526 * simulates errors in the bitstream to test error concealment.
1527 * - encoding: set by user.
1528 * - decoding: unused.
1529 */
1530 int error_rate;
1531
1532 /**
1533 * MP3 antialias algorithm, see FF_AA_* below.
1534 * - encoding: unused
1535 * - decoding: set by user
1536 */
1537 int antialias_algo;
1538 #define FF_AA_AUTO 0
1539 #define FF_AA_FASTINT 1 //not implemented yet
1540 #define FF_AA_INT 2
1541 #define FF_AA_FLOAT 3
1542 /**
1543 * Quantizer noise shaping.
1544 * - encoding: set by user
1545 * - decoding: unused
1546 */
1547 int quantizer_noise_shaping;
1548
1549 /**
1550 * Thread count.
1551 * is used to decide how many independant tasks should be passed to execute()
1552 * - encoding: set by user
1553 * - decoding: set by user
1554 */
1555 int thread_count;
1556
1557 /**
1558 * the codec may call this to execute several independant things. it will return only after
1559 * finishing all tasks, the user may replace this with some multithreaded implementation, the
1560 * default implementation will execute the parts serially
1561 * @param count the number of things to execute
1562 * - encoding: set by lavc, user can override
1563 * - decoding: set by lavc, user can override
1564 */
1565 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1566
1567 /**
1568 * Thread opaque.
1569 * can be used by execute() to store some per AVCodecContext stuff.
1570 * - encoding: set by execute()
1571 * - decoding: set by execute()
1572 */
1573 void *thread_opaque;
1574
1575 /**
1576 * Motion estimation threshold. under which no motion estimation is
1577 * performed, but instead the user specified motion vectors are used
1578 *
1579 * - encoding: set by user
1580 * - decoding: unused
1581 */
1582 int me_threshold;
1583
1584 /**
1585 * Macroblock threshold. under which the user specified macroblock types will be used
1586 * - encoding: set by user
1587 * - decoding: unused
1588 */
1589 int mb_threshold;
1590
1591 /**
1592 *
1593 * - encoding: set by user
1594 * - decoding: unused
1595 */
1596 int intra_dc_precision;
1597 } AVCodecContext;
1598
1599
1600 /**
1601 * AVOption.
1602 */
1603 typedef struct AVOption {
1604 /** options' name */
1605 const char *name; /* if name is NULL, it indicates a link to next */
1606 /** short English text help or const struct AVOption* subpointer */
1607 const char *help; // const struct AVOption* sub;
1608 /** offset to context structure where the parsed value should be stored */
1609 int offset;
1610 /** options' type */
1611 int type;
1612 #define FF_OPT_TYPE_BOOL 1 ///< boolean - true,1,on (or simply presence)
1613 #define FF_OPT_TYPE_DOUBLE 2 ///< double
1614 #define FF_OPT_TYPE_INT 3 ///< integer
1615 #define FF_OPT_TYPE_STRING 4 ///< string (finished with \0)
1616 #define FF_OPT_TYPE_MASK 0x1f ///< mask for types - upper bits are various flags
1617 //#define FF_OPT_TYPE_EXPERT 0x20 // flag for expert option
1618 #define FF_OPT_TYPE_FLAG (FF_OPT_TYPE_BOOL | 0x40)
1619 #define FF_OPT_TYPE_RCOVERRIDE (FF_OPT_TYPE_STRING | 0x80)
1620 /** min value (min == max -> no limits) */
1621 double min;
1622 /** maximum value for double/int */
1623 double max;
1624 /** default boo [0,1]l/double/int value */
1625 double defval;
1626 /**
1627 * default string value (with optional semicolon delimited extra option-list
1628 * i.e. option1;option2;option3
1629 * defval might select other then first argument as default
1630 */
1631 const char *defstr;
1632 #define FF_OPT_MAX_DEPTH 10
1633 } AVOption;
1634
1635 /**
1636 * Parse option(s) and sets fields in passed structure
1637 * @param strct structure where the parsed results will be written
1638 * @param list list with AVOptions
1639 * @param opts string with options for parsing
1640 */
1641 int avoption_parse(void* strct, const AVOption* list, const char* opts);
1642
1643
1644 /**
1645 * AVCodec.
1646 */
1647 typedef struct AVCodec {
1648 const char *name;
1649 enum CodecType type;
1650 int id;
1651 int priv_data_size;
1652 int (*init)(AVCodecContext *);
1653 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
1654 int (*close)(AVCodecContext *);
1655 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
1656 uint8_t *buf, int buf_size);
1657 int capabilities;
1658 const AVOption *options;
1659 struct AVCodec *next;
1660 void (*flush)(AVCodecContext *);
1661 const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
1662 const enum PixelFormat *pix_fmts; ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
1663 } AVCodec;
1664
1665 /**
1666 * four components are given, that's all.
1667 * the last component is alpha
1668 */
1669 typedef struct AVPicture {
1670 uint8_t *data[4];
1671 int linesize[4]; ///< number of bytes per line
1672 } AVPicture;
1673
1674 /**
1675 * AVPaletteControl
1676 * This structure defines a method for communicating palette changes
1677 * between and demuxer and a decoder.
1678 */
1679 #define AVPALETTE_SIZE 1024
1680 #define AVPALETTE_COUNT 256
1681 typedef struct AVPaletteControl {
1682
1683 /* demuxer sets this to 1 to indicate the palette has changed;
1684 * decoder resets to 0 */
1685 int palette_changed;
1686
1687 /* 4-byte ARGB palette entries, stored in native byte order; note that
1688 * the individual palette components should be on a 8-bit scale; if
1689 * the palette data comes from a IBM VGA native format, the component
1690 * data is probably 6 bits in size and needs to be scaled */
1691 unsigned int palette[AVPALETTE_COUNT];
1692
1693 } AVPaletteControl;
1694
1695 extern AVCodec ac3_encoder;
1696 extern AVCodec mp2_encoder;
1697 extern AVCodec mp3lame_encoder;
1698 extern AVCodec oggvorbis_encoder;
1699 extern AVCodec faac_encoder;
1700 extern AVCodec mpeg1video_encoder;
1701 extern AVCodec mpeg2video_encoder;
1702 extern AVCodec h263_encoder;
1703 extern AVCodec h263p_encoder;
1704 extern AVCodec flv_encoder;
1705 extern AVCodec rv10_encoder;
1706 extern AVCodec rv20_encoder;
1707 extern AVCodec dvvideo_encoder;
1708 extern AVCodec mjpeg_encoder;
1709 extern AVCodec ljpeg_encoder;
1710 extern AVCodec mpeg4_encoder;
1711 extern AVCodec msmpeg4v1_encoder;
1712 extern AVCodec msmpeg4v2_encoder;
1713 extern AVCodec msmpeg4v3_encoder;
1714 extern AVCodec wmv1_encoder;
1715 extern AVCodec wmv2_encoder;
1716 extern AVCodec huffyuv_encoder;
1717 extern AVCodec h264_encoder;
1718 extern AVCodec asv1_encoder;
1719 extern AVCodec asv2_encoder;
1720 extern AVCodec vcr1_encoder;
1721 extern AVCodec ffv1_encoder;
1722 extern AVCodec mdec_encoder;
1723 extern AVCodec zlib_encoder;
1724 extern AVCodec svq1_encoder;
1725
1726 extern AVCodec h263_decoder;
1727 extern AVCodec mpeg4_decoder;
1728 extern AVCodec msmpeg4v1_decoder;
1729 extern AVCodec msmpeg4v2_decoder;
1730 extern AVCodec msmpeg4v3_decoder;
1731 extern AVCodec wmv1_decoder;
1732 extern AVCodec wmv2_decoder;
1733 extern AVCodec mpeg1video_decoder;
1734 extern AVCodec mpeg2video_decoder;
1735 extern AVCodec mpegvideo_decoder;
1736 extern AVCodec mpeg_xvmc_decoder;
1737 extern AVCodec h263i_decoder;
1738 extern AVCodec flv_decoder;
1739 extern AVCodec rv10_decoder;
1740 extern AVCodec rv20_decoder;
1741 extern AVCodec svq1_decoder;
1742 extern AVCodec svq3_decoder;
1743 extern AVCodec dvvideo_decoder;
1744 extern AVCodec wmav1_decoder;
1745 extern AVCodec wmav2_decoder;
1746 extern AVCodec mjpeg_decoder;
1747 extern AVCodec mjpegb_decoder;
1748 extern AVCodec sp5x_decoder;
1749 extern AVCodec mp2_decoder;
1750 extern AVCodec mp3_decoder;
1751 extern AVCodec mace3_decoder;
1752 extern AVCodec mace6_decoder;
1753 extern AVCodec huffyuv_decoder;
1754 extern AVCodec oggvorbis_decoder;
1755 extern AVCodec cyuv_decoder;
1756 extern AVCodec h264_decoder;
1757 extern AVCodec indeo3_decoder;
1758 extern AVCodec vp3_decoder;
1759 extern AVCodec theora_decoder;
1760 extern AVCodec amr_nb_decoder;
1761 extern AVCodec amr_nb_encoder;
1762 extern AVCodec amr_wb_encoder;
1763 extern AVCodec amr_wb_decoder;
1764 extern AVCodec aac_decoder;
1765 extern AVCodec mpeg4aac_decoder;
1766 extern AVCodec asv1_decoder;
1767 extern AVCodec asv2_decoder;
1768 extern AVCodec vcr1_decoder;
1769 extern AVCodec cljr_decoder;
1770 extern AVCodec ffv1_decoder;
1771 extern AVCodec fourxm_decoder;
1772 extern AVCodec mdec_decoder;
1773 extern AVCodec roq_decoder;
1774 extern AVCodec interplay_video_decoder;
1775 extern AVCodec xan_wc3_decoder;
1776 extern AVCodec rpza_decoder;
1777 extern AVCodec cinepak_decoder;
1778 extern AVCodec msrle_decoder;
1779 extern AVCodec msvideo1_decoder;
1780 extern AVCodec vqa_decoder;
1781 extern AVCodec idcin_decoder;
1782 extern AVCodec eightbps_decoder;
1783 extern AVCodec smc_decoder;
1784 extern AVCodec flic_decoder;
1785 extern AVCodec vmdvideo_decoder;
1786 extern AVCodec vmdaudio_decoder;
1787 extern AVCodec truemotion1_decoder;
1788 extern AVCodec mszh_decoder;
1789 extern AVCodec zlib_decoder;
1790 extern AVCodec ra_144_decoder;
1791 extern AVCodec ra_288_decoder;
1792 extern AVCodec roq_dpcm_decoder;
1793 extern AVCodec interplay_dpcm_decoder;
1794 extern AVCodec xan_dpcm_decoder;
1795 extern AVCodec qtrle_decoder;
1796 extern AVCodec flac_decoder;
1797
1798 /* pcm codecs */
1799 #define PCM_CODEC(id, name) \
1800 extern AVCodec name ## _decoder; \
1801 extern AVCodec name ## _encoder
1802
1803 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
1804 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
1805 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
1806 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
1807 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
1808 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
1809 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
1810 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
1811
1812 /* adpcm codecs */
1813
1814 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
1815 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
1816 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
1817 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
1818 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
1819 PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
1820 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
1821 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
1822 PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
1823 PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
1824 PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
1825 PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
1826
1827 #undef PCM_CODEC
1828
1829 /* dummy raw video codec */
1830 extern AVCodec rawvideo_encoder;
1831 extern AVCodec rawvideo_decoder;
1832
1833 /* the following codecs use external GPL libs */
1834 extern AVCodec ac3_decoder;
1835
1836 /* resample.c */
1837
1838 struct ReSampleContext;
1839
1840 typedef struct ReSampleContext ReSampleContext;
1841
1842 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
1843 int output_rate, int input_rate);
1844 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
1845 void audio_resample_close(ReSampleContext *s);
1846
1847 /* YUV420 format is assumed ! */
1848
1849 struct ImgReSampleContext;
1850
1851 typedef struct ImgReSampleContext ImgReSampleContext;
1852
1853 ImgReSampleContext *img_resample_init(int output_width, int output_height,
1854 int input_width, int input_height);
1855
1856 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
1857 int iwidth, int iheight,
1858 int topBand, int bottomBand,
1859 int leftBand, int rightBand,
1860 int padtop, int padbottom,
1861 int padleft, int padright);
1862
1863
1864 void img_resample(ImgReSampleContext *s,
1865 AVPicture *output, const AVPicture *input);
1866
1867 void img_resample_close(ImgReSampleContext *s);
1868
1869 /**
1870 * Allocate memory for a picture. Call avpicture_free to free it.
1871 *
1872 * @param picture the picture to be filled in.
1873 * @param pix_fmt the format of the picture.
1874 * @param width the width of the picture.
1875 * @param height the height of the picture.
1876 * @return 0 if successful, -1 if not.
1877 */
1878 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
1879
1880 /* Free a picture previously allocated by avpicture_alloc. */
1881 void avpicture_free(AVPicture *picture);
1882
1883 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
1884 int pix_fmt, int width, int height);
1885 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
1886 unsigned char *dest, int dest_size);
1887 int avpicture_get_size(int pix_fmt, int width, int height);
1888 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
1889 const char *avcodec_get_pix_fmt_name(int pix_fmt);
1890 enum PixelFormat avcodec_get_pix_fmt(const char* name);
1891
1892 #define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
1893 #define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
1894 #define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
1895 #define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
1896 #define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
1897 #define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
1898
1899 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
1900 int has_alpha);
1901 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
1902 int has_alpha, int *loss_ptr);
1903
1904 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
1905 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
1906 int img_get_alpha_info(const AVPicture *src,
1907 int pix_fmt, int width, int height);
1908
1909 /* convert among pixel formats */
1910 int img_convert(AVPicture *dst, int dst_pix_fmt,
1911 const AVPicture *src, int pix_fmt,
1912 int width, int height);
1913
1914 /* deinterlace a picture */
1915 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
1916 int pix_fmt, int width, int height);
1917
1918 /* external high level API */
1919
1920 extern AVCodec *first_avcodec;
1921
1922 /* returns LIBAVCODEC_VERSION_INT constant */
1923 unsigned avcodec_version(void);
1924 /* returns LIBAVCODEC_BUILD constant */
1925 unsigned avcodec_build(void);
1926 void avcodec_init(void);
1927
1928 void register_avcodec(AVCodec *format);
1929 AVCodec *avcodec_find_encoder(enum CodecID id);
1930 AVCodec *avcodec_find_encoder_by_name(const char *name);
1931 AVCodec *avcodec_find_decoder(enum CodecID id);
1932 AVCodec *avcodec_find_decoder_by_name(const char *name);
1933 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
1934
1935 void avcodec_get_context_defaults(AVCodecContext *s);
1936 AVCodecContext *avcodec_alloc_context(void);
1937 void avcodec_get_frame_defaults(AVFrame *pic);
1938 AVFrame *avcodec_alloc_frame(void);
1939
1940 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
1941 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
1942 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
1943 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
1944 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
1945
1946 int avcodec_thread_init(AVCodecContext *s, int thread_count);
1947 void avcodec_thread_free(AVCodecContext *s);
1948 int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
1949 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
1950 //FIXME func typedef
1951
1952 /**
1953 * opens / inits the AVCodecContext.
1954 * not thread save!
1955 */
1956 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
1957
1958 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
1959 int *frame_size_ptr,
1960 uint8_t *buf, int buf_size);
1961 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
1962 int *got_picture_ptr,
1963 uint8_t *buf, int buf_size);
1964 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
1965 int *data_size_ptr,
1966 uint8_t *buf, int buf_size);
1967 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
1968 const short *samples);
1969 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
1970 const AVFrame *pict);
1971
1972 int avcodec_close(AVCodecContext *avctx);
1973
1974 void avcodec_register_all(void);
1975
1976 void avcodec_flush_buffers(AVCodecContext *avctx);
1977
1978 /* misc usefull functions */
1979
1980 /**
1981 * returns a single letter to describe the picture type
1982 */
1983 char av_get_pict_type_char(int pict_type);
1984
1985 /**
1986 * reduce a fraction.
1987 * this is usefull for framerate calculations
1988 * @param max the maximum allowed for dst_nom & dst_den
1989 * @return 1 if exact, 0 otherwise
1990 */
1991 int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max);
1992
1993 /**
1994 * rescale a 64bit integer.
1995 * a simple a*b/c isnt possible as it can overflow
1996 */
1997 int64_t av_rescale(int64_t a, int64_t b, int64_t c);
1998
1999
2000 /**
2001 * Interface for 0.5.0 version
2002 *
2003 * do not even think about it's usage for this moment
2004 */
2005
2006 typedef struct {
2007 /// compressed size used from given memory buffer
2008 int size;
2009 /// I/P/B frame type
2010 int frame_type;
2011 } avc_enc_result_t;
2012
2013 /**
2014 * Commands
2015 * order can't be changed - once it was defined
2016 */
2017 typedef enum {
2018 // general commands
2019 AVC_OPEN_BY_NAME = 0xACA000,
2020 AVC_OPEN_BY_CODEC_ID,
2021 AVC_OPEN_BY_FOURCC,
2022 AVC_CLOSE,
2023
2024 AVC_FLUSH,
2025 // pin - struct { uint8_t* src, uint_t src_size }
2026 // pout - struct { AVPicture* img, consumed_bytes,
2027 AVC_DECODE,
2028 // pin - struct { AVPicture* img, uint8_t* dest, uint_t dest_size }
2029 // pout - uint_t used_from_dest_size
2030 AVC_ENCODE,
2031
2032 // query/get video commands
2033 AVC_GET_VERSION = 0xACB000,
2034 AVC_GET_WIDTH,
2035 AVC_GET_HEIGHT,
2036 AVC_GET_DELAY,
2037 AVC_GET_QUANT_TABLE,
2038 // ...
2039
2040 // query/get audio commands
2041 AVC_GET_FRAME_SIZE = 0xABC000,
2042
2043 // maybe define some simple structure which
2044 // might be passed to the user - but they can't
2045 // contain any codec specific parts and these
2046 // calls are usualy necessary only few times
2047
2048 // set video commands
2049 AVC_SET_WIDTH = 0xACD000,
2050 AVC_SET_HEIGHT,
2051
2052 // set video encoding commands
2053 AVC_SET_FRAME_RATE = 0xACD800,
2054 AVC_SET_QUALITY,
2055 AVC_SET_HURRY_UP,
2056
2057 // set audio commands
2058 AVC_SET_SAMPLE_RATE = 0xACE000,
2059 AVC_SET_CHANNELS,
2060
2061 } avc_cmd_t;
2062
2063 /**
2064 * \param handle allocated private structure by libavcodec
2065 * for initialization pass NULL - will be returned pout
2066 * user is supposed to know nothing about its structure
2067 * \param cmd type of operation to be performed
2068 * \param pint input parameter
2069 * \param pout output parameter
2070 *
2071 * \returns command status - eventually for query command it might return
2072 * integer resulting value
2073 */
2074 int avcodec(void* handle, avc_cmd_t cmd, void* pin, void* pout);
2075
2076 /* frame parsing */
2077 typedef struct AVCodecParserContext {
2078 void *priv_data;
2079 struct AVCodecParser *parser;
2080 int64_t frame_offset; /* offset of the current frame */
2081 int64_t cur_offset; /* current offset
2082 (incremented by each av_parser_parse()) */
2083 int64_t last_frame_offset; /* offset of the last frame */
2084 /* video info */
2085 int pict_type; /* XXX: put it back in AVCodecContext */
2086 int repeat_pict; /* XXX: put it back in AVCodecContext */
2087 int64_t pts; /* pts of the current frame */
2088 int64_t dts; /* dts of the current frame */
2089
2090 /* private data */
2091 int64_t last_pts;
2092 int64_t last_dts;
2093 int fetch_timestamp;
2094
2095 #define AV_PARSER_PTS_NB 4
2096 int cur_frame_start_index;
2097 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2098 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2099 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2100 } AVCodecParserContext;
2101
2102 typedef struct AVCodecParser {
2103 int codec_ids[3]; /* several codec IDs are permitted */
2104 int priv_data_size;
2105 int (*parser_init)(AVCodecParserContext *s);
2106 int (*parser_parse)(AVCodecParserContext *s,
2107 AVCodecContext *avctx,
2108 uint8_t **poutbuf, int *poutbuf_size,
2109 const uint8_t *buf, int buf_size);
2110 void (*parser_close)(AVCodecParserContext *s);
2111 struct AVCodecParser *next;
2112 } AVCodecParser;
2113
2114 extern AVCodecParser *av_first_parser;
2115
2116 void av_register_codec_parser(AVCodecParser *parser);
2117 AVCodecParserContext *av_parser_init(int codec_id);
2118 int av_parser_parse(AVCodecParserContext *s,
2119 AVCodecContext *avctx,
2120 uint8_t **poutbuf, int *poutbuf_size,
2121 const uint8_t *buf, int buf_size,
2122 int64_t pts, int64_t dts);
2123 void av_parser_close(AVCodecParserContext *s);
2124
2125 extern AVCodecParser mpegvideo_parser;
2126 extern AVCodecParser mpeg4video_parser;
2127 extern AVCodecParser h263_parser;
2128 extern AVCodecParser h264_parser;
2129 extern AVCodecParser mpegaudio_parser;
2130 extern AVCodecParser ac3_parser;
2131
2132 /* memory */
2133 void *av_malloc(unsigned int size);
2134 void *av_mallocz(unsigned int size);
2135 void *av_realloc(void *ptr, unsigned int size);
2136 void av_free(void *ptr);
2137 char *av_strdup(const char *s);
2138 void av_freep(void *ptr);
2139 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2140 /* for static data only */
2141 /* call av_free_static to release all staticaly allocated tables */
2142 void av_free_static(void);
2143 void *av_mallocz_static(unsigned int size);
2144
2145 /* add by bero : in adx.c */
2146 int is_adx(const unsigned char *buf,size_t bufsize);
2147
2148 void img_copy(AVPicture *dst, const AVPicture *src,
2149 int pix_fmt, int width, int height);
2150
2151 /* av_log API */
2152
2153 #include <stdarg.h>
2154
2155 #define AV_LOG_QUIET -1
2156 #define AV_LOG_ERROR 0
2157 #define AV_LOG_INFO 1
2158 #define AV_LOG_DEBUG 2
2159
2160 extern void av_log(void*, int level, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 3, 4)));
2161 extern void av_vlog(void*, int level, const char *fmt, va_list);
2162 extern int av_log_get_level(void);
2163 extern void av_log_set_level(int);
2164 extern void av_log_set_callback(void (*)(void*, int, const char*, va_list));
2165
2166 /* endian macros */
2167 #if !defined(BE_16) || !defined(BE_32) || !defined(LE_16) || !defined(LE_32)
2168 #define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
2169 #define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
2170 (((uint8_t*)(x))[1] << 16) | \
2171 (((uint8_t*)(x))[2] << 8) | \
2172 ((uint8_t*)(x))[3])
2173 #define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
2174 #define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \
2175 (((uint8_t*)(x))[2] << 16) | \
2176 (((uint8_t*)(x))[1] << 8) | \
2177 ((uint8_t*)(x))[0])
2178 #endif
2179
2180 #ifdef __cplusplus
2181 }
2182 #endif
2183
2184 #endif /* AVCODEC_H */