h261 decoder by (Maarten Daniels <maarten.daniels at student dot luc dot ac dot be>)
[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_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
145 /* CODEC_ID_MP3LAME is absolete */
146 #define CODEC_ID_MP3LAME CODEC_ID_MP3
147
148 enum CodecType {
149 CODEC_TYPE_UNKNOWN = -1,
150 CODEC_TYPE_VIDEO,
151 CODEC_TYPE_AUDIO,
152 CODEC_TYPE_DATA,
153 };
154
155 /**
156 * Pixel format. Notes:
157 *
158 * PIX_FMT_RGBA32 is handled in an endian-specific manner. A RGBA
159 * color is put together as:
160 * (A << 24) | (R << 16) | (G << 8) | B
161 * This is stored as BGRA on little endian CPU architectures and ARGB on
162 * big endian CPUs.
163 *
164 * When the pixel format is palettized RGB (PIX_FMT_PAL8), the palettized
165 * image data is stored in AVFrame.data[0]. The palette is transported in
166 * AVFrame.data[1] and, is 1024 bytes long (256 4-byte entries) and is
167 * formatted the same as in PIX_FMT_RGBA32 described above (i.e., it is
168 * also endian-specific). Note also that the individual RGB palette
169 * components stored in AVFrame.data[1] should be in the range 0..255.
170 * This is important as many custom PAL8 video codecs that were designed
171 * to run on the IBM VGA graphics adapter use 6-bit palette components.
172 */
173 enum PixelFormat {
174 PIX_FMT_YUV420P, ///< Planar YUV 4:2:0 (1 Cr & Cb sample per 2x2 Y samples)
175 PIX_FMT_YUV422,
176 PIX_FMT_RGB24, ///< Packed pixel, 3 bytes per pixel, RGBRGB...
177 PIX_FMT_BGR24, ///< Packed pixel, 3 bytes per pixel, BGRBGR...
178 PIX_FMT_YUV422P, ///< Planar YUV 4:2:2 (1 Cr & Cb sample per 2x1 Y samples)
179 PIX_FMT_YUV444P, ///< Planar YUV 4:4:4 (1 Cr & Cb sample per 1x1 Y samples)
180 PIX_FMT_RGBA32, ///< Packed pixel, 4 bytes per pixel, BGRABGRA..., stored in cpu endianness
181 PIX_FMT_YUV410P, ///< Planar YUV 4:1:0 (1 Cr & Cb sample per 4x4 Y samples)
182 PIX_FMT_YUV411P, ///< Planar YUV 4:1:1 (1 Cr & Cb sample per 4x1 Y samples)
183 PIX_FMT_RGB565, ///< always stored in cpu endianness
184 PIX_FMT_RGB555, ///< always stored in cpu endianness, most significant bit to 1
185 PIX_FMT_GRAY8,
186 PIX_FMT_MONOWHITE, ///< 0 is white
187 PIX_FMT_MONOBLACK, ///< 0 is black
188 PIX_FMT_PAL8, ///< 8 bit with RGBA palette
189 PIX_FMT_YUVJ420P, ///< Planar YUV 4:2:0 full scale (jpeg)
190 PIX_FMT_YUVJ422P, ///< Planar YUV 4:2:2 full scale (jpeg)
191 PIX_FMT_YUVJ444P, ///< Planar YUV 4:4:4 full scale (jpeg)
192 PIX_FMT_XVMC_MPEG2_MC,///< XVideo Motion Acceleration via common packet passing(xvmc_render.h)
193 PIX_FMT_XVMC_MPEG2_IDCT,
194 PIX_FMT_NB,
195 };
196
197 /* currently unused, may be used if 24/32 bits samples ever supported */
198 enum SampleFormat {
199 SAMPLE_FMT_S16 = 0, ///< signed 16 bits
200 };
201
202 /* in bytes */
203 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 131072
204
205 /**
206 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
207 * this is mainly needed because some optimized bitstream readers read
208 * 32 or 64 bit at once and could read over the end<br>
209 * Note, if the first 23 bits of the additional bytes are not 0 then damaged
210 * MPEG bitstreams could cause overread and segfault
211 */
212 #define FF_INPUT_BUFFER_PADDING_SIZE 8
213
214 /* motion estimation type, EPZS by default */
215 enum Motion_Est_ID {
216 ME_ZERO = 1,
217 ME_FULL,
218 ME_LOG,
219 ME_PHODS,
220 ME_EPZS,
221 ME_X1
222 };
223
224 typedef struct RcOverride{
225 int start_frame;
226 int end_frame;
227 int qscale; // if this is 0 then quality_factor will be used instead
228 float quality_factor;
229 } RcOverride;
230
231 /* only for ME compatiblity with old apps */
232 extern int motion_estimation_method;
233
234 #define FF_MAX_B_FRAMES 8
235
236 /* encoding support
237 these flags can be passed in AVCodecContext.flags before initing
238 Note: note not everything is supported yet
239 */
240
241 #define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
242 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / Advanced prediction for H263
243 #define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
244 #define CODEC_FLAG_GMC 0x0020 ///< use GMC
245 #define CODEC_FLAG_MV0 0x0040 ///< always try a MB with MV=<0,0>
246 #define CODEC_FLAG_PART 0x0080 ///< use data partitioning
247 /* parent program gurantees that the input for b-frame containing streams is not written to
248 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
249 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
250 #define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
251 #define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
252 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
253 #define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
254 #define CODEC_FLAG_EMU_EDGE 0x4000///< dont draw edges
255 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
256 #define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
257 of only at frame boundaries */
258 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
259 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
260 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay
261 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
262 #define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
263 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
264 #define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
265 /* Fx : Flag for h263+ extra options */
266 #define CODEC_FLAG_H263P_AIC 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
267 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
268 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
269 #define CODEC_FLAG_CBP_RD 0x04000000 ///< use rate distortion optimization for cbp
270 #define CODEC_FLAG_QP_RD 0x08000000 ///< use rate distortion optimization for qp selectioon
271 #define CODEC_FLAG_H263P_AIV 0x00000008 ///< H263 Alternative inter vlc
272 #define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
273 #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
274 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
275 #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
276 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
277 #define CODEC_FLAG_CLOSED_GOP 0x80000000
278 /* Unsupported options :
279 * Syntax Arithmetic coding (SAC)
280 * Reference Picture Selection
281 * Independant Segment Decoding */
282 /* /Fx */
283 /* codec capabilities */
284
285 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
286 /**
287 * Codec uses get_buffer() for allocating buffers.
288 * direct rendering method 1
289 */
290 #define CODEC_CAP_DR1 0x0002
291 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
292 used */
293 #define CODEC_CAP_PARSE_ONLY 0x0004
294 #define CODEC_CAP_TRUNCATED 0x0008
295 /* codec can export data for HW decoding (XvMC) */
296 #define CODEC_CAP_HWACCEL 0x0010
297
298 //the following defines might change, so dont expect compatibility if u use them
299 #define MB_TYPE_INTRA4x4 0x0001
300 #define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
301 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME h264 specific
302 #define MB_TYPE_16x16 0x0008
303 #define MB_TYPE_16x8 0x0010
304 #define MB_TYPE_8x16 0x0020
305 #define MB_TYPE_8x8 0x0040
306 #define MB_TYPE_INTERLACED 0x0080
307 #define MB_TYPE_DIRECT2 0x0100 //FIXME
308 #define MB_TYPE_ACPRED 0x0200
309 #define MB_TYPE_GMC 0x0400
310 #define MB_TYPE_SKIP 0x0800
311 #define MB_TYPE_P0L0 0x1000
312 #define MB_TYPE_P1L0 0x2000
313 #define MB_TYPE_P0L1 0x4000
314 #define MB_TYPE_P1L1 0x8000
315 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
316 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
317 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
318 #define MB_TYPE_QUANT 0x00010000
319 #define MB_TYPE_CBP 0x00020000
320 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
321
322 /**
323 * Pan Scan area.
324 * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
325 */
326 typedef struct AVPanScan{
327 /**
328 * id.
329 * - encoding: set by user.
330 * - decoding: set by lavc
331 */
332 int id;
333
334 /**
335 * width and height in 1/16 pel
336 * - encoding: set by user.
337 * - decoding: set by lavc
338 */
339 int width;
340 int height;
341
342 /**
343 * position of the top left corner in 1/16 pel for up to 3 fields/frames.
344 * - encoding: set by user.
345 * - decoding: set by lavc
346 */
347 int16_t position[3][2];
348 }AVPanScan;
349
350 #define FF_COMMON_FRAME \
351 /**\
352 * pointer to the picture planes.\
353 * this might be different from the first allocated byte\
354 * - encoding: \
355 * - decoding: \
356 */\
357 uint8_t *data[4];\
358 int linesize[4];\
359 /**\
360 * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
361 * this isnt used by lavc unless the default get/release_buffer() is used\
362 * - encoding: \
363 * - decoding: \
364 */\
365 uint8_t *base[4];\
366 /**\
367 * 1 -> keyframe, 0-> not\
368 * - encoding: set by lavc\
369 * - decoding: set by lavc\
370 */\
371 int key_frame;\
372 \
373 /**\
374 * picture type of the frame, see ?_TYPE below.\
375 * - encoding: set by lavc for coded_picture (and set by user for input)\
376 * - decoding: set by lavc\
377 */\
378 int pict_type;\
379 \
380 /**\
381 * presentation timestamp in AV_TIME_BASE (=micro seconds currently) (time when frame should be shown to user)\
382 * if AV_NOPTS_VALUE then the frame_rate will be used as reference\
383 * - encoding: MUST be set by user\
384 * - decoding: set by lavc\
385 */\
386 int64_t pts;\
387 \
388 /**\
389 * picture number in bitstream order.\
390 * - encoding: set by\
391 * - decoding: set by lavc\
392 */\
393 int coded_picture_number;\
394 /**\
395 * picture number in display order.\
396 * - encoding: set by\
397 * - decoding: set by lavc\
398 */\
399 int display_picture_number;\
400 \
401 /**\
402 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
403 * - encoding: set by lavc for coded_picture (and set by user for input)\
404 * - decoding: set by lavc\
405 */\
406 int quality; \
407 \
408 /**\
409 * buffer age (1->was last buffer and dint change, 2->..., ...).\
410 * set to INT_MAX if the buffer has not been used yet \
411 * - encoding: unused\
412 * - decoding: MUST be set by get_buffer()\
413 */\
414 int age;\
415 \
416 /**\
417 * is this picture used as reference\
418 * - encoding: unused\
419 * - decoding: set by lavc (before get_buffer() call))\
420 */\
421 int reference;\
422 \
423 /**\
424 * QP table\
425 * - encoding: unused\
426 * - decoding: set by lavc\
427 */\
428 int8_t *qscale_table;\
429 /**\
430 * QP store stride\
431 * - encoding: unused\
432 * - decoding: set by lavc\
433 */\
434 int qstride;\
435 \
436 /**\
437 * mbskip_table[mb]>=1 if MB didnt change\
438 * stride= mb_width = (width+15)>>4\
439 * - encoding: unused\
440 * - decoding: set by lavc\
441 */\
442 uint8_t *mbskip_table;\
443 \
444 /**\
445 * Motion vector table\
446 * - encoding: set by user\
447 * - decoding: set by lavc\
448 */\
449 int16_t (*motion_val[2])[2];\
450 \
451 /**\
452 * Macroblock type table\
453 * mb_type_base + mb_width + 2\
454 * - encoding: set by user\
455 * - decoding: set by lavc\
456 */\
457 uint32_t *mb_type;\
458 \
459 /**\
460 * Macroblock size: (0->16x16, 1->8x8, 2-> 4x4, 3-> 2x2)\
461 * - encoding: unused\
462 * - decoding: set by lavc\
463 */\
464 uint8_t motion_subsample_log2;\
465 \
466 /**\
467 * for some private data of the user\
468 * - encoding: unused\
469 * - decoding: set by user\
470 */\
471 void *opaque;\
472 \
473 /**\
474 * error\
475 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
476 * - decoding: unused\
477 */\
478 uint64_t error[4];\
479 \
480 /**\
481 * type of the buffer (to keep track of who has to dealloc data[*])\
482 * - encoding: set by the one who allocs it\
483 * - decoding: set by the one who allocs it\
484 * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
485 */\
486 int type;\
487 \
488 /**\
489 * when decoding, this signal how much the picture must be delayed.\
490 * extra_delay = repeat_pict / (2*fps)\
491 * - encoding: unused\
492 * - decoding: set by lavc\
493 */\
494 int repeat_pict;\
495 \
496 /**\
497 * \
498 */\
499 int qscale_type;\
500 \
501 /**\
502 * The content of the picture is interlaced.\
503 * - encoding: set by user\
504 * - decoding: set by lavc (default 0)\
505 */\
506 int interlaced_frame;\
507 \
508 /**\
509 * if the content is interlaced, is top field displayed first.\
510 * - encoding: set by user\
511 * - decoding: set by lavc\
512 */\
513 int top_field_first;\
514 \
515 /**\
516 * Pan scan.\
517 * - encoding: set by user\
518 * - decoding: set by lavc\
519 */\
520 AVPanScan *pan_scan;\
521 \
522 /**\
523 * tell user application that palette has changed from previous frame.\
524 * - encoding: ??? (no palette-enabled encoder yet)\
525 * - decoding: set by lavc (default 0)\
526 */\
527 int palette_has_changed;\
528 \
529 /**\
530 * Codec suggestion on buffer type if != 0\
531 * - encoding: unused\
532 * - decoding: set by lavc (before get_buffer() call))\
533 */\
534 int buffer_hints;\
535 \
536 /**\
537 * DCT coeffitients\
538 * - encoding: unused\
539 * - decoding: set by lavc\
540 */\
541 short *dct_coeff;\
542 \
543 /**\
544 * Motion referece frame index\
545 * - encoding: set by user\
546 * - decoding: set by lavc\
547 */\
548 int8_t *ref_index[2];
549
550 #define FF_QSCALE_TYPE_MPEG1 0
551 #define FF_QSCALE_TYPE_MPEG2 1
552
553 #define FF_BUFFER_TYPE_INTERNAL 1
554 #define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
555 #define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewher else, dont dealloc image (data/base), all other tables are not shared
556 #define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, dont dealloc anything
557
558
559 #define FF_I_TYPE 1 // Intra
560 #define FF_P_TYPE 2 // Predicted
561 #define FF_B_TYPE 3 // Bi-dir predicted
562 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
563 #define FF_SI_TYPE 5
564 #define FF_SP_TYPE 6
565
566 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore)
567 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
568 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
569 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
570
571 /**
572 * Audio Video Frame.
573 */
574 typedef struct AVFrame {
575 FF_COMMON_FRAME
576 } AVFrame;
577
578 #define DEFAULT_FRAME_RATE_BASE 1001000
579
580 /**
581 * Used by av_log
582 */
583 typedef struct AVCLASS AVClass;
584 struct AVCLASS {
585 const char* class_name;
586 const char* (*item_name)(void*); /* actually passing a pointer to an AVCodecContext
587 or AVFormatContext, which begin with an AVClass.
588 Needed because av_log is in libavcodec and has no visibility
589 of AVIn/OutputFormat */
590 };
591
592 /**
593 * main external api structure.
594 */
595 typedef struct AVCodecContext {
596 /**
597 * Info on struct for av_log
598 * - set by avcodec_alloc_context
599 */
600 AVClass *av_class;
601 /**
602 * the average bitrate.
603 * - encoding: set by user. unused for constant quantizer encoding
604 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
605 */
606 int bit_rate;
607
608 /**
609 * number of bits the bitstream is allowed to diverge from the reference.
610 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
611 * - encoding: set by user. unused for constant quantizer encoding
612 * - decoding: unused
613 */
614 int bit_rate_tolerance;
615
616 /**
617 * CODEC_FLAG_*.
618 * - encoding: set by user.
619 * - decoding: set by user.
620 */
621 int flags;
622
623 /**
624 * some codecs needs additionnal format info. It is stored here
625 * - encoding: set by user.
626 * - decoding: set by lavc. (FIXME is this ok?)
627 */
628 int sub_id;
629
630 /**
631 * motion estimation algorithm used for video coding.
632 * - encoding: MUST be set by user.
633 * - decoding: unused
634 */
635 int me_method;
636
637 /**
638 * some codecs need / can use extra-data like huffman tables.
639 * mjpeg: huffman tables
640 * rv10: additional flags
641 * mpeg4: global headers (they can be in the bitstream or here)
642 * - encoding: set/allocated/freed by lavc.
643 * - decoding: set/allocated/freed by user.
644 */
645 void *extradata;
646 int extradata_size;
647
648 /* video only */
649 /**
650 * frames per sec multiplied by frame_rate_base.
651 * for variable fps this is the precission, so if the timestamps
652 * can be specified in msec precssion then this is 1000*frame_rate_base
653 * - encoding: MUST be set by user
654 * - decoding: set by lavc. 0 or the frame_rate if available
655 */
656 int frame_rate;
657
658 /**
659 * width / height.
660 * - encoding: MUST be set by user.
661 * - decoding: set by user if known, codec should override / dynamically change if needed
662 */
663 int width, height;
664
665 #define FF_ASPECT_EXTENDED 15
666
667 /**
668 * the number of pictures in a group of pitures, or 0 for intra_only.
669 * - encoding: set by user.
670 * - decoding: unused
671 */
672 int gop_size;
673
674 /**
675 * pixel format, see PIX_FMT_xxx.
676 * - encoding: FIXME: used by ffmpeg to decide whether an pix_fmt
677 * conversion is in order. This only works for
678 * codecs with one supported pix_fmt, we should
679 * do something for a generic case as well.
680 * - decoding: set by lavc.
681 */
682 enum PixelFormat pix_fmt;
683
684 /**
685 * Frame rate emulation. If not zero lower layer (i.e. format handler)
686 * has to read frames at native frame rate.
687 * - encoding: set by user.
688 * - decoding: unused.
689 */
690 int rate_emu;
691
692 /**
693 * if non NULL, 'draw_horiz_band' is called by the libavcodec
694 * decoder to draw an horizontal band. It improve cache usage. Not
695 * all codecs can do that. You must check the codec capabilities
696 * before
697 * - encoding: unused
698 * - decoding: set by user.
699 * @param height the height of the slice
700 * @param y the y position of the slice
701 * @param type 1->top field, 2->bottom field, 3->frame
702 * @param offset offset into the AVFrame.data from which the slice should be read
703 */
704 void (*draw_horiz_band)(struct AVCodecContext *s,
705 const AVFrame *src, int offset[4],
706 int y, int type, int height);
707
708 /* audio only */
709 int sample_rate; ///< samples per sec
710 int channels;
711 int sample_fmt; ///< sample format, currenly unused
712
713 /* the following data should not be initialized */
714 int frame_size; ///< in samples, initialized when calling 'init'
715 int frame_number; ///< audio or video frame number
716 int real_pict_num; ///< returns the real picture number of previous encoded frame
717
718 /**
719 * number of frames the decoded output will be delayed relative to
720 * the encoded input.
721 * - encoding: set by lavc.
722 * - decoding: unused
723 */
724 int delay;
725
726 /* - encoding parameters */
727 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
728 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
729
730 /**
731 * minimum quantizer.
732 * - encoding: set by user.
733 * - decoding: unused
734 */
735 int qmin;
736
737 /**
738 * maximum quantizer.
739 * - encoding: set by user.
740 * - decoding: unused
741 */
742 int qmax;
743
744 /**
745 * maximum quantizer difference etween frames.
746 * - encoding: set by user.
747 * - decoding: unused
748 */
749 int max_qdiff;
750
751 /**
752 * maximum number of b frames between non b frames.
753 * note: the output will be delayed by max_b_frames+1 relative to the input
754 * - encoding: set by user.
755 * - decoding: unused
756 */
757 int max_b_frames;
758
759 /**
760 * qscale factor between ip and b frames.
761 * - encoding: set by user.
762 * - decoding: unused
763 */
764 float b_quant_factor;
765
766 /** obsolete FIXME remove */
767 int rc_strategy;
768 int b_frame_strategy;
769
770 /**
771 * hurry up amount.
772 * - encoding: unused
773 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
774 */
775 int hurry_up;
776
777 struct AVCodec *codec;
778
779 void *priv_data;
780
781 /* unused, FIXME remove*/
782 int rtp_mode;
783
784 int rtp_payload_size; /* The size of the RTP payload, the coder will */
785 /* do it's best to deliver a chunk with size */
786 /* below rtp_payload_size, the chunk will start */
787 /* with a start code on some codecs like H.263 */
788 /* This doesn't take account of any particular */
789 /* headers inside the transmited RTP payload */
790
791
792 /* The RTP callcack: This function is called */
793 /* every time the encoder as a packet to send */
794 /* Depends on the encoder if the data starts */
795 /* with a Start Code (it should) H.263 does */
796 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int packet_number);
797
798 /* statistics, used for 2-pass encoding */
799 int mv_bits;
800 int header_bits;
801 int i_tex_bits;
802 int p_tex_bits;
803 int i_count;
804 int p_count;
805 int skip_count;
806 int misc_bits;
807
808 /**
809 * number of bits used for the previously encoded frame.
810 * - encoding: set by lavc
811 * - decoding: unused
812 */
813 int frame_bits;
814
815 /**
816 * private data of the user, can be used to carry app specific stuff.
817 * - encoding: set by user
818 * - decoding: set by user
819 */
820 void *opaque;
821
822 char codec_name[32];
823 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
824 enum CodecID codec_id; /* see CODEC_ID_xxx */
825
826 /**
827 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
828 * this is used to workaround some encoder bugs
829 * - encoding: set by user, if not then the default based on codec_id will be used
830 * - decoding: set by user, will be converted to upper case by lavc during init
831 */
832 unsigned int codec_tag;
833
834 /**
835 * workaround bugs in encoders which sometimes cannot be detected automatically.
836 * - encoding: unused
837 * - decoding: set by user
838 */
839 int workaround_bugs;
840 #define FF_BUG_AUTODETECT 1 ///< autodetection
841 #define FF_BUG_OLD_MSMPEG4 2
842 #define FF_BUG_XVID_ILACE 4
843 #define FF_BUG_UMP4 8
844 #define FF_BUG_NO_PADDING 16
845 #define FF_BUG_AMV 32
846 #define FF_BUG_AC_VLC 0 ///< will be removed, libavcodec can now handle these non compliant files by default
847 #define FF_BUG_QPEL_CHROMA 64
848 #define FF_BUG_STD_QPEL 128
849 #define FF_BUG_QPEL_CHROMA2 256
850 #define FF_BUG_DIRECT_BLOCKSIZE 512
851 #define FF_BUG_EDGE 1024
852 #define FF_BUG_HPEL_CHROMA 2048
853 #define FF_BUG_DC_CLIP 4096
854 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
855
856 /**
857 * luma single coeff elimination threshold.
858 * - encoding: set by user
859 * - decoding: unused
860 */
861 int luma_elim_threshold;
862
863 /**
864 * chroma single coeff elimination threshold.
865 * - encoding: set by user
866 * - decoding: unused
867 */
868 int chroma_elim_threshold;
869
870 /**
871 * strictly follow the std (MPEG4, ...).
872 * - encoding: set by user
873 * - decoding: unused
874 */
875 int strict_std_compliance;
876
877 /**
878 * qscale offset between ip and b frames.
879 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
880 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
881 * - encoding: set by user.
882 * - decoding: unused
883 */
884 float b_quant_offset;
885
886 /**
887 * error resilience higher values will detect more errors but may missdetect
888 * some more or less valid parts as errors.
889 * - encoding: unused
890 * - decoding: set by user
891 */
892 int error_resilience;
893 #define FF_ER_CAREFULL 1
894 #define FF_ER_COMPLIANT 2
895 #define FF_ER_AGGRESSIVE 3
896 #define FF_ER_VERY_AGGRESSIVE 4
897
898 /**
899 * called at the beginning of each frame to get a buffer for it.
900 * if pic.reference is set then the frame will be read later by lavc
901 * avcodec_align_dimensions() should be used to find the required width and
902 * height, as they normally need to be rounded up to the next multiple of 16
903 * - encoding: unused
904 * - decoding: set by lavc, user can override
905 */
906 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
907
908 /**
909 * called to release buffers which where allocated with get_buffer.
910 * a released buffer can be reused in get_buffer()
911 * pic.data[*] must be set to NULL
912 * - encoding: unused
913 * - decoding: set by lavc, user can override
914 */
915 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
916
917 /**
918 * is 1 if the decoded stream contains b frames, 0 otherwise.
919 * - encoding: unused
920 * - decoding: set by lavc
921 */
922 int has_b_frames;
923
924 int block_align; ///< used by some WAV based audio codecs
925
926 int parse_only; /* - decoding only: if true, only parsing is done
927 (function avcodec_parse_frame()). The frame
928 data is returned. Only MPEG codecs support this now. */
929
930 /**
931 * 0-> h263 quant 1-> mpeg quant.
932 * - encoding: set by user.
933 * - decoding: unused
934 */
935 int mpeg_quant;
936
937 /**
938 * pass1 encoding statistics output buffer.
939 * - encoding: set by lavc
940 * - decoding: unused
941 */
942 char *stats_out;
943
944 /**
945 * pass2 encoding statistics input buffer.
946 * concatenated stuff from stats_out of pass1 should be placed here
947 * - encoding: allocated/set/freed by user
948 * - decoding: unused
949 */
950 char *stats_in;
951
952 /**
953 * ratecontrol qmin qmax limiting method.
954 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
955 * - encoding: set by user.
956 * - decoding: unused
957 */
958 float rc_qsquish;
959
960 float rc_qmod_amp;
961 int rc_qmod_freq;
962
963 /**
964 * ratecontrol override, see RcOverride.
965 * - encoding: allocated/set/freed by user.
966 * - decoding: unused
967 */
968 RcOverride *rc_override;
969 int rc_override_count;
970
971 /**
972 * rate control equation.
973 * - encoding: set by user
974 * - decoding: unused
975 */
976 char *rc_eq;
977
978 /**
979 * maximum bitrate.
980 * - encoding: set by user.
981 * - decoding: unused
982 */
983 int rc_max_rate;
984
985 /**
986 * minimum bitrate.
987 * - encoding: set by user.
988 * - decoding: unused
989 */
990 int rc_min_rate;
991
992 /**
993 * decoder bitstream buffer size.
994 * - encoding: set by user.
995 * - decoding: unused
996 */
997 int rc_buffer_size;
998 float rc_buffer_aggressivity;
999
1000 /**
1001 * qscale factor between p and i frames.
1002 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1003 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1004 * - encoding: set by user.
1005 * - decoding: unused
1006 */
1007 float i_quant_factor;
1008
1009 /**
1010 * qscale offset between p and i frames.
1011 * - encoding: set by user.
1012 * - decoding: unused
1013 */
1014 float i_quant_offset;
1015
1016 /**
1017 * initial complexity for pass1 ratecontrol.
1018 * - encoding: set by user.
1019 * - decoding: unused
1020 */
1021 float rc_initial_cplx;
1022
1023 /**
1024 * dct algorithm, see FF_DCT_* below.
1025 * - encoding: set by user
1026 * - decoding: unused
1027 */
1028 int dct_algo;
1029 #define FF_DCT_AUTO 0
1030 #define FF_DCT_FASTINT 1
1031 #define FF_DCT_INT 2
1032 #define FF_DCT_MMX 3
1033 #define FF_DCT_MLIB 4
1034 #define FF_DCT_ALTIVEC 5
1035 #define FF_DCT_FAAN 6
1036
1037 /**
1038 * luminance masking (0-> disabled).
1039 * - encoding: set by user
1040 * - decoding: unused
1041 */
1042 float lumi_masking;
1043
1044 /**
1045 * temporary complexity masking (0-> disabled).
1046 * - encoding: set by user
1047 * - decoding: unused
1048 */
1049 float temporal_cplx_masking;
1050
1051 /**
1052 * spatial complexity masking (0-> disabled).
1053 * - encoding: set by user
1054 * - decoding: unused
1055 */
1056 float spatial_cplx_masking;
1057
1058 /**
1059 * p block masking (0-> disabled).
1060 * - encoding: set by user
1061 * - decoding: unused
1062 */
1063 float p_masking;
1064
1065 /**
1066 * darkness masking (0-> disabled).
1067 * - encoding: set by user
1068 * - decoding: unused
1069 */
1070 float dark_masking;
1071
1072
1073 /* for binary compatibility */
1074 int unused;
1075
1076 /**
1077 * idct algorithm, see FF_IDCT_* below.
1078 * - encoding: set by user
1079 * - decoding: set by user
1080 */
1081 int idct_algo;
1082 #define FF_IDCT_AUTO 0
1083 #define FF_IDCT_INT 1
1084 #define FF_IDCT_SIMPLE 2
1085 #define FF_IDCT_SIMPLEMMX 3
1086 #define FF_IDCT_LIBMPEG2MMX 4
1087 #define FF_IDCT_PS2 5
1088 #define FF_IDCT_MLIB 6
1089 #define FF_IDCT_ARM 7
1090 #define FF_IDCT_ALTIVEC 8
1091 #define FF_IDCT_SH4 9
1092 #define FF_IDCT_SIMPLEARM 10
1093
1094 /**
1095 * slice count.
1096 * - encoding: set by lavc
1097 * - decoding: set by user (or 0)
1098 */
1099 int slice_count;
1100 /**
1101 * slice offsets in the frame in bytes.
1102 * - encoding: set/allocated by lavc
1103 * - decoding: set/allocated by user (or NULL)
1104 */
1105 int *slice_offset;
1106
1107 /**
1108 * error concealment flags.
1109 * - encoding: unused
1110 * - decoding: set by user
1111 */
1112 int error_concealment;
1113 #define FF_EC_GUESS_MVS 1
1114 #define FF_EC_DEBLOCK 2
1115
1116 /**
1117 * dsp_mask could be add used to disable unwanted CPU features
1118 * CPU features (i.e. MMX, SSE. ...)
1119 *
1120 * with FORCE flag you may instead enable given CPU features
1121 * (Dangerous: usable in case of misdetection, improper usage however will
1122 * result into program crash)
1123 */
1124 unsigned dsp_mask;
1125 #define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
1126 /* lower 16 bits - CPU features */
1127 #ifdef HAVE_MMX
1128 #define FF_MM_MMX 0x0001 /* standard MMX */
1129 #define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
1130 #define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
1131 #define FF_MM_SSE 0x0008 /* SSE functions */
1132 #define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
1133 #endif /* HAVE_MMX */
1134
1135 /**
1136 * bits per sample/pixel from the demuxer (needed for huffyuv).
1137 * - encoding: set by lavc
1138 * - decoding: set by user
1139 */
1140 int bits_per_sample;
1141
1142 /**
1143 * prediction method (needed for huffyuv).
1144 * - encoding: set by user
1145 * - decoding: unused
1146 */
1147 int prediction_method;
1148 #define FF_PRED_LEFT 0
1149 #define FF_PRED_PLANE 1
1150 #define FF_PRED_MEDIAN 2
1151
1152 /**
1153 * sample aspect ratio (0 if unknown).
1154 * numerator and denominator must be relative prime and smaller then 256 for some video standards
1155 * - encoding: set by user.
1156 * - decoding: set by lavc.
1157 */
1158 AVRational sample_aspect_ratio;
1159
1160 /**
1161 * the picture in the bitstream.
1162 * - encoding: set by lavc
1163 * - decoding: set by lavc
1164 */
1165 AVFrame *coded_frame;
1166
1167 /**
1168 * debug.
1169 * - encoding: set by user.
1170 * - decoding: set by user.
1171 */
1172 int debug;
1173 #define FF_DEBUG_PICT_INFO 1
1174 #define FF_DEBUG_RC 2
1175 #define FF_DEBUG_BITSTREAM 4
1176 #define FF_DEBUG_MB_TYPE 8
1177 #define FF_DEBUG_QP 16
1178 #define FF_DEBUG_MV 32
1179 #define FF_DEBUG_DCT_COEFF 0x00000040
1180 #define FF_DEBUG_SKIP 0x00000080
1181 #define FF_DEBUG_STARTCODE 0x00000100
1182 #define FF_DEBUG_PTS 0x00000200
1183 #define FF_DEBUG_ER 0x00000400
1184 #define FF_DEBUG_MMCO 0x00000800
1185 #define FF_DEBUG_BUGS 0x00001000
1186 #define FF_DEBUG_VIS_QP 0x00002000
1187 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1188
1189 /**
1190 * debug.
1191 * - encoding: set by user.
1192 * - decoding: set by user.
1193 */
1194 int debug_mv;
1195 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1196 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1197 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1198
1199 /**
1200 * error.
1201 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1202 * - decoding: unused
1203 */
1204 uint64_t error[4];
1205
1206 /**
1207 * minimum MB quantizer.
1208 * - encoding: set by user.
1209 * - decoding: unused
1210 */
1211 int mb_qmin;
1212
1213 /**
1214 * maximum MB quantizer.
1215 * - encoding: set by user.
1216 * - decoding: unused
1217 */
1218 int mb_qmax;
1219
1220 /**
1221 * motion estimation compare function.
1222 * - encoding: set by user.
1223 * - decoding: unused
1224 */
1225 int me_cmp;
1226 /**
1227 * subpixel motion estimation compare function.
1228 * - encoding: set by user.
1229 * - decoding: unused
1230 */
1231 int me_sub_cmp;
1232 /**
1233 * macroblock compare function (not supported yet).
1234 * - encoding: set by user.
1235 * - decoding: unused
1236 */
1237 int mb_cmp;
1238 /**
1239 * interlaced dct compare function
1240 * - encoding: set by user.
1241 * - decoding: unused
1242 */
1243 int ildct_cmp;
1244 #define FF_CMP_SAD 0
1245 #define FF_CMP_SSE 1
1246 #define FF_CMP_SATD 2
1247 #define FF_CMP_DCT 3
1248 #define FF_CMP_PSNR 4
1249 #define FF_CMP_BIT 5
1250 #define FF_CMP_RD 6
1251 #define FF_CMP_ZERO 7
1252 #define FF_CMP_VSAD 8
1253 #define FF_CMP_VSSE 9
1254 #define FF_CMP_CHROMA 256
1255
1256 /**
1257 * ME diamond size & shape.
1258 * - encoding: set by user.
1259 * - decoding: unused
1260 */
1261 int dia_size;
1262
1263 /**
1264 * amount of previous MV predictors (2a+1 x 2a+1 square).
1265 * - encoding: set by user.
1266 * - decoding: unused
1267 */
1268 int last_predictor_count;
1269
1270 /**
1271 * pre pass for motion estimation.
1272 * - encoding: set by user.
1273 * - decoding: unused
1274 */
1275 int pre_me;
1276
1277 /**
1278 * motion estimation pre pass compare function.
1279 * - encoding: set by user.
1280 * - decoding: unused
1281 */
1282 int me_pre_cmp;
1283
1284 /**
1285 * ME pre pass diamond size & shape.
1286 * - encoding: set by user.
1287 * - decoding: unused
1288 */
1289 int pre_dia_size;
1290
1291 /**
1292 * subpel ME quality.
1293 * - encoding: set by user.
1294 * - decoding: unused
1295 */
1296 int me_subpel_quality;
1297
1298 /**
1299 * callback to negotiate the pixelFormat.
1300 * @param fmt is the list of formats which are supported by the codec,
1301 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1302 * the first is allways the native one
1303 * @return the choosen format
1304 * - encoding: unused
1305 * - decoding: set by user, if not set then the native format will always be choosen
1306 */
1307 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1308
1309 /**
1310 * DTG active format information (additionnal aspect ratio
1311 * information only used in DVB MPEG2 transport streams). 0 if
1312 * not set.
1313 *
1314 * - encoding: unused.
1315 * - decoding: set by decoder
1316 */
1317 int dtg_active_format;
1318 #define FF_DTG_AFD_SAME 8
1319 #define FF_DTG_AFD_4_3 9
1320 #define FF_DTG_AFD_16_9 10
1321 #define FF_DTG_AFD_14_9 11
1322 #define FF_DTG_AFD_4_3_SP_14_9 13
1323 #define FF_DTG_AFD_16_9_SP_14_9 14
1324 #define FF_DTG_AFD_SP_4_3 15
1325
1326 /**
1327 * Maximum motion estimation search range in subpel units.
1328 * if 0 then no limit
1329 *
1330 * - encoding: set by user.
1331 * - decoding: unused.
1332 */
1333 int me_range;
1334
1335 /**
1336 * frame_rate_base.
1337 * for variable fps this is 1
1338 * - encoding: set by user.
1339 * - decoding: set by lavc.
1340 * @todo move this after frame_rate
1341 */
1342
1343 int frame_rate_base;
1344 /**
1345 * intra quantizer bias.
1346 * - encoding: set by user.
1347 * - decoding: unused
1348 */
1349 int intra_quant_bias;
1350 #define FF_DEFAULT_QUANT_BIAS 999999
1351
1352 /**
1353 * inter quantizer bias.
1354 * - encoding: set by user.
1355 * - decoding: unused
1356 */
1357 int inter_quant_bias;
1358
1359 /**
1360 * color table ID.
1361 * - encoding: unused.
1362 * - decoding: which clrtable should be used for 8bit RGB images
1363 * table have to be stored somewhere FIXME
1364 */
1365 int color_table_id;
1366
1367 /**
1368 * internal_buffer count.
1369 * Dont touch, used by lavc default_get_buffer()
1370 */
1371 int internal_buffer_count;
1372
1373 /**
1374 * internal_buffers.
1375 * Dont touch, used by lavc default_get_buffer()
1376 */
1377 void *internal_buffer;
1378
1379 #define FF_LAMBDA_SHIFT 7
1380 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1381 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1382 #define FF_LAMBDA_MAX (256*128-1)
1383
1384 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1385 /**
1386 * global quality for codecs which cannot change it per frame.
1387 * this should be proportional to MPEG1/2/4 qscale.
1388 * - encoding: set by user.
1389 * - decoding: unused
1390 */
1391 int global_quality;
1392
1393 #define FF_CODER_TYPE_VLC 0
1394 #define FF_CODER_TYPE_AC 1
1395 /**
1396 * coder type
1397 * - encoding: set by user.
1398 * - decoding: unused
1399 */
1400 int coder_type;
1401
1402 /**
1403 * context model
1404 * - encoding: set by user.
1405 * - decoding: unused
1406 */
1407 int context_model;
1408
1409 /**
1410 * slice flags
1411 * - encoding: unused
1412 * - decoding: set by user.
1413 */
1414 int slice_flags;
1415 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1416 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1417 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1418
1419 /**
1420 * XVideo Motion Acceleration
1421 * - encoding: forbidden
1422 * - decoding: set by decoder
1423 */
1424 int xvmc_acceleration;
1425
1426 /**
1427 * macroblock decision mode
1428 * - encoding: set by user.
1429 * - decoding: unused
1430 */
1431 int mb_decision;
1432 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1433 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1434 #define FF_MB_DECISION_RD 2 ///< rate distoration
1435
1436 /**
1437 * custom intra quantization matrix
1438 * - encoding: set by user, can be NULL
1439 * - decoding: set by lavc
1440 */
1441 uint16_t *intra_matrix;
1442
1443 /**
1444 * custom inter quantization matrix
1445 * - encoding: set by user, can be NULL
1446 * - decoding: set by lavc
1447 */
1448 uint16_t *inter_matrix;
1449
1450 /**
1451 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1452 * this is used to workaround some encoder bugs
1453 * - encoding: unused
1454 * - decoding: set by user, will be converted to upper case by lavc during init
1455 */
1456 unsigned int stream_codec_tag;
1457
1458 /**
1459 * scene change detection threshold.
1460 * 0 is default, larger means fewer detected scene changes
1461 * - encoding: set by user.
1462 * - decoding: unused
1463 */
1464 int scenechange_threshold;
1465
1466 /**
1467 * minimum lagrange multipler
1468 * - encoding: set by user.
1469 * - decoding: unused
1470 */
1471 int lmin;
1472
1473 /**
1474 * maximum lagrange multipler
1475 * - encoding: set by user.
1476 * - decoding: unused
1477 */
1478 int lmax;
1479
1480 /**
1481 * Palette control structure
1482 * - encoding: ??? (no palette-enabled encoder yet)
1483 * - decoding: set by user.
1484 */
1485 struct AVPaletteControl *palctrl;
1486
1487 /**
1488 * noise reduction strength
1489 * - encoding: set by user.
1490 * - decoding: unused
1491 */
1492 int noise_reduction;
1493
1494 /**
1495 * called at the beginning of a frame to get cr buffer for it.
1496 * buffer type (size, hints) must be the same. lavc won't check it.
1497 * lavc will pass previous buffer in pic, function should return
1498 * same buffer or new buffer with old frame "painted" into it.
1499 * if pic.data[0] == NULL must behave like get_buffer().
1500 * - encoding: unused
1501 * - decoding: set by lavc, user can override
1502 */
1503 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1504
1505 /**
1506 * number of bits which should be loaded into the rc buffer before decoding starts
1507 * - encoding: set by user.
1508 * - decoding: unused
1509 */
1510 int rc_initial_buffer_occupancy;
1511
1512 /**
1513 *
1514 * - encoding: set by user.
1515 * - decoding: unused
1516 */
1517 int inter_threshold;
1518
1519 /**
1520 * CODEC_FLAG2_*.
1521 * - encoding: set by user.
1522 * - decoding: set by user.
1523 */
1524 int flags2;
1525
1526 /**
1527 * simulates errors in the bitstream to test error concealment.
1528 * - encoding: set by user.
1529 * - decoding: unused.
1530 */
1531 int error_rate;
1532
1533 /**
1534 * MP3 antialias algorithm, see FF_AA_* below.
1535 * - encoding: unused
1536 * - decoding: set by user
1537 */
1538 int antialias_algo;
1539 #define FF_AA_AUTO 0
1540 #define FF_AA_FASTINT 1 //not implemented yet
1541 #define FF_AA_INT 2
1542 #define FF_AA_FLOAT 3
1543 /**
1544 * Quantizer noise shaping.
1545 * - encoding: set by user
1546 * - decoding: unused
1547 */
1548 int quantizer_noise_shaping;
1549
1550 /**
1551 * Thread count.
1552 * is used to decide how many independant tasks should be passed to execute()
1553 * - encoding: set by user
1554 * - decoding: set by user
1555 */
1556 int thread_count;
1557
1558 /**
1559 * the codec may call this to execute several independant things. it will return only after
1560 * finishing all tasks, the user may replace this with some multithreaded implementation, the
1561 * default implementation will execute the parts serially
1562 * @param count the number of things to execute
1563 * - encoding: set by lavc, user can override
1564 * - decoding: set by lavc, user can override
1565 */
1566 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1567
1568 /**
1569 * Thread opaque.
1570 * can be used by execute() to store some per AVCodecContext stuff.
1571 * - encoding: set by execute()
1572 * - decoding: set by execute()
1573 */
1574 void *thread_opaque;
1575
1576 /**
1577 * Motion estimation threshold. under which no motion estimation is
1578 * performed, but instead the user specified motion vectors are used
1579 *
1580 * - encoding: set by user
1581 * - decoding: unused
1582 */
1583 int me_threshold;
1584
1585 /**
1586 * Macroblock threshold. under which the user specified macroblock types will be used
1587 * - encoding: set by user
1588 * - decoding: unused
1589 */
1590 int mb_threshold;
1591
1592 /**
1593 *
1594 * - encoding: set by user
1595 * - decoding: unused
1596 */
1597 int intra_dc_precision;
1598 } AVCodecContext;
1599
1600
1601 /**
1602 * AVOption.
1603 */
1604 typedef struct AVOption {
1605 /** options' name */
1606 const char *name; /* if name is NULL, it indicates a link to next */
1607 /** short English text help or const struct AVOption* subpointer */
1608 const char *help; // const struct AVOption* sub;
1609 /** offset to context structure where the parsed value should be stored */
1610 int offset;
1611 /** options' type */
1612 int type;
1613 #define FF_OPT_TYPE_BOOL 1 ///< boolean - true,1,on (or simply presence)
1614 #define FF_OPT_TYPE_DOUBLE 2 ///< double
1615 #define FF_OPT_TYPE_INT 3 ///< integer
1616 #define FF_OPT_TYPE_STRING 4 ///< string (finished with \0)
1617 #define FF_OPT_TYPE_MASK 0x1f ///< mask for types - upper bits are various flags
1618 //#define FF_OPT_TYPE_EXPERT 0x20 // flag for expert option
1619 #define FF_OPT_TYPE_FLAG (FF_OPT_TYPE_BOOL | 0x40)
1620 #define FF_OPT_TYPE_RCOVERRIDE (FF_OPT_TYPE_STRING | 0x80)
1621 /** min value (min == max -> no limits) */
1622 double min;
1623 /** maximum value for double/int */
1624 double max;
1625 /** default boo [0,1]l/double/int value */
1626 double defval;
1627 /**
1628 * default string value (with optional semicolon delimited extra option-list
1629 * i.e. option1;option2;option3
1630 * defval might select other then first argument as default
1631 */
1632 const char *defstr;
1633 #define FF_OPT_MAX_DEPTH 10
1634 } AVOption;
1635
1636 /**
1637 * Parse option(s) and sets fields in passed structure
1638 * @param strct structure where the parsed results will be written
1639 * @param list list with AVOptions
1640 * @param opts string with options for parsing
1641 */
1642 int avoption_parse(void* strct, const AVOption* list, const char* opts);
1643
1644
1645 /**
1646 * AVCodec.
1647 */
1648 typedef struct AVCodec {
1649 const char *name;
1650 enum CodecType type;
1651 int id;
1652 int priv_data_size;
1653 int (*init)(AVCodecContext *);
1654 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
1655 int (*close)(AVCodecContext *);
1656 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
1657 uint8_t *buf, int buf_size);
1658 int capabilities;
1659 const AVOption *options;
1660 struct AVCodec *next;
1661 void (*flush)(AVCodecContext *);
1662 const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
1663 const enum PixelFormat *pix_fmts; ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
1664 } AVCodec;
1665
1666 /**
1667 * four components are given, that's all.
1668 * the last component is alpha
1669 */
1670 typedef struct AVPicture {
1671 uint8_t *data[4];
1672 int linesize[4]; ///< number of bytes per line
1673 } AVPicture;
1674
1675 /**
1676 * AVPaletteControl
1677 * This structure defines a method for communicating palette changes
1678 * between and demuxer and a decoder.
1679 */
1680 #define AVPALETTE_SIZE 1024
1681 #define AVPALETTE_COUNT 256
1682 typedef struct AVPaletteControl {
1683
1684 /* demuxer sets this to 1 to indicate the palette has changed;
1685 * decoder resets to 0 */
1686 int palette_changed;
1687
1688 /* 4-byte ARGB palette entries, stored in native byte order; note that
1689 * the individual palette components should be on a 8-bit scale; if
1690 * the palette data comes from a IBM VGA native format, the component
1691 * data is probably 6 bits in size and needs to be scaled */
1692 unsigned int palette[AVPALETTE_COUNT];
1693
1694 } AVPaletteControl;
1695
1696 extern AVCodec ac3_encoder;
1697 extern AVCodec mp2_encoder;
1698 extern AVCodec mp3lame_encoder;
1699 extern AVCodec oggvorbis_encoder;
1700 extern AVCodec faac_encoder;
1701 extern AVCodec mpeg1video_encoder;
1702 extern AVCodec mpeg2video_encoder;
1703 extern AVCodec h263_encoder;
1704 extern AVCodec h263p_encoder;
1705 extern AVCodec flv_encoder;
1706 extern AVCodec rv10_encoder;
1707 extern AVCodec rv20_encoder;
1708 extern AVCodec dvvideo_encoder;
1709 extern AVCodec mjpeg_encoder;
1710 extern AVCodec ljpeg_encoder;
1711 extern AVCodec mpeg4_encoder;
1712 extern AVCodec msmpeg4v1_encoder;
1713 extern AVCodec msmpeg4v2_encoder;
1714 extern AVCodec msmpeg4v3_encoder;
1715 extern AVCodec wmv1_encoder;
1716 extern AVCodec wmv2_encoder;
1717 extern AVCodec huffyuv_encoder;
1718 extern AVCodec h264_encoder;
1719 extern AVCodec asv1_encoder;
1720 extern AVCodec asv2_encoder;
1721 extern AVCodec vcr1_encoder;
1722 extern AVCodec ffv1_encoder;
1723 extern AVCodec mdec_encoder;
1724 extern AVCodec zlib_encoder;
1725 extern AVCodec svq1_encoder;
1726
1727 extern AVCodec h263_decoder;
1728 extern AVCodec h261_decoder;
1729 extern AVCodec mpeg4_decoder;
1730 extern AVCodec msmpeg4v1_decoder;
1731 extern AVCodec msmpeg4v2_decoder;
1732 extern AVCodec msmpeg4v3_decoder;
1733 extern AVCodec wmv1_decoder;
1734 extern AVCodec wmv2_decoder;
1735 extern AVCodec mpeg1video_decoder;
1736 extern AVCodec mpeg2video_decoder;
1737 extern AVCodec mpegvideo_decoder;
1738 extern AVCodec mpeg_xvmc_decoder;
1739 extern AVCodec h263i_decoder;
1740 extern AVCodec flv_decoder;
1741 extern AVCodec rv10_decoder;
1742 extern AVCodec rv20_decoder;
1743 extern AVCodec svq1_decoder;
1744 extern AVCodec svq3_decoder;
1745 extern AVCodec dvvideo_decoder;
1746 extern AVCodec wmav1_decoder;
1747 extern AVCodec wmav2_decoder;
1748 extern AVCodec mjpeg_decoder;
1749 extern AVCodec mjpegb_decoder;
1750 extern AVCodec sp5x_decoder;
1751 extern AVCodec mp2_decoder;
1752 extern AVCodec mp3_decoder;
1753 extern AVCodec mace3_decoder;
1754 extern AVCodec mace6_decoder;
1755 extern AVCodec huffyuv_decoder;
1756 extern AVCodec oggvorbis_decoder;
1757 extern AVCodec cyuv_decoder;
1758 extern AVCodec h264_decoder;
1759 extern AVCodec indeo3_decoder;
1760 extern AVCodec vp3_decoder;
1761 extern AVCodec theora_decoder;
1762 extern AVCodec amr_nb_decoder;
1763 extern AVCodec amr_nb_encoder;
1764 extern AVCodec amr_wb_encoder;
1765 extern AVCodec amr_wb_decoder;
1766 extern AVCodec aac_decoder;
1767 extern AVCodec mpeg4aac_decoder;
1768 extern AVCodec asv1_decoder;
1769 extern AVCodec asv2_decoder;
1770 extern AVCodec vcr1_decoder;
1771 extern AVCodec cljr_decoder;
1772 extern AVCodec ffv1_decoder;
1773 extern AVCodec fourxm_decoder;
1774 extern AVCodec mdec_decoder;
1775 extern AVCodec roq_decoder;
1776 extern AVCodec interplay_video_decoder;
1777 extern AVCodec xan_wc3_decoder;
1778 extern AVCodec rpza_decoder;
1779 extern AVCodec cinepak_decoder;
1780 extern AVCodec msrle_decoder;
1781 extern AVCodec msvideo1_decoder;
1782 extern AVCodec vqa_decoder;
1783 extern AVCodec idcin_decoder;
1784 extern AVCodec eightbps_decoder;
1785 extern AVCodec smc_decoder;
1786 extern AVCodec flic_decoder;
1787 extern AVCodec vmdvideo_decoder;
1788 extern AVCodec vmdaudio_decoder;
1789 extern AVCodec truemotion1_decoder;
1790 extern AVCodec mszh_decoder;
1791 extern AVCodec zlib_decoder;
1792 extern AVCodec ra_144_decoder;
1793 extern AVCodec ra_288_decoder;
1794 extern AVCodec roq_dpcm_decoder;
1795 extern AVCodec interplay_dpcm_decoder;
1796 extern AVCodec xan_dpcm_decoder;
1797 extern AVCodec qtrle_decoder;
1798 extern AVCodec flac_decoder;
1799
1800 /* pcm codecs */
1801 #define PCM_CODEC(id, name) \
1802 extern AVCodec name ## _decoder; \
1803 extern AVCodec name ## _encoder
1804
1805 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
1806 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
1807 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
1808 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
1809 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
1810 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
1811 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
1812 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
1813
1814 /* adpcm codecs */
1815
1816 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
1817 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
1818 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
1819 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
1820 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
1821 PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
1822 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
1823 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
1824 PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
1825 PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
1826 PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
1827 PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
1828
1829 #undef PCM_CODEC
1830
1831 /* dummy raw video codec */
1832 extern AVCodec rawvideo_encoder;
1833 extern AVCodec rawvideo_decoder;
1834
1835 /* the following codecs use external GPL libs */
1836 extern AVCodec ac3_decoder;
1837
1838 /* resample.c */
1839
1840 struct ReSampleContext;
1841
1842 typedef struct ReSampleContext ReSampleContext;
1843
1844 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
1845 int output_rate, int input_rate);
1846 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
1847 void audio_resample_close(ReSampleContext *s);
1848
1849 /* YUV420 format is assumed ! */
1850
1851 struct ImgReSampleContext;
1852
1853 typedef struct ImgReSampleContext ImgReSampleContext;
1854
1855 ImgReSampleContext *img_resample_init(int output_width, int output_height,
1856 int input_width, int input_height);
1857
1858 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
1859 int iwidth, int iheight,
1860 int topBand, int bottomBand,
1861 int leftBand, int rightBand,
1862 int padtop, int padbottom,
1863 int padleft, int padright);
1864
1865
1866 void img_resample(ImgReSampleContext *s,
1867 AVPicture *output, const AVPicture *input);
1868
1869 void img_resample_close(ImgReSampleContext *s);
1870
1871 /**
1872 * Allocate memory for a picture. Call avpicture_free to free it.
1873 *
1874 * @param picture the picture to be filled in.
1875 * @param pix_fmt the format of the picture.
1876 * @param width the width of the picture.
1877 * @param height the height of the picture.
1878 * @return 0 if successful, -1 if not.
1879 */
1880 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
1881
1882 /* Free a picture previously allocated by avpicture_alloc. */
1883 void avpicture_free(AVPicture *picture);
1884
1885 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
1886 int pix_fmt, int width, int height);
1887 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
1888 unsigned char *dest, int dest_size);
1889 int avpicture_get_size(int pix_fmt, int width, int height);
1890 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
1891 const char *avcodec_get_pix_fmt_name(int pix_fmt);
1892 enum PixelFormat avcodec_get_pix_fmt(const char* name);
1893
1894 #define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
1895 #define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
1896 #define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
1897 #define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
1898 #define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
1899 #define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
1900
1901 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
1902 int has_alpha);
1903 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
1904 int has_alpha, int *loss_ptr);
1905
1906 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
1907 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
1908 int img_get_alpha_info(const AVPicture *src,
1909 int pix_fmt, int width, int height);
1910
1911 /* convert among pixel formats */
1912 int img_convert(AVPicture *dst, int dst_pix_fmt,
1913 const AVPicture *src, int pix_fmt,
1914 int width, int height);
1915
1916 /* deinterlace a picture */
1917 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
1918 int pix_fmt, int width, int height);
1919
1920 /* external high level API */
1921
1922 extern AVCodec *first_avcodec;
1923
1924 /* returns LIBAVCODEC_VERSION_INT constant */
1925 unsigned avcodec_version(void);
1926 /* returns LIBAVCODEC_BUILD constant */
1927 unsigned avcodec_build(void);
1928 void avcodec_init(void);
1929
1930 void register_avcodec(AVCodec *format);
1931 AVCodec *avcodec_find_encoder(enum CodecID id);
1932 AVCodec *avcodec_find_encoder_by_name(const char *name);
1933 AVCodec *avcodec_find_decoder(enum CodecID id);
1934 AVCodec *avcodec_find_decoder_by_name(const char *name);
1935 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
1936
1937 void avcodec_get_context_defaults(AVCodecContext *s);
1938 AVCodecContext *avcodec_alloc_context(void);
1939 void avcodec_get_frame_defaults(AVFrame *pic);
1940 AVFrame *avcodec_alloc_frame(void);
1941
1942 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
1943 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
1944 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
1945 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
1946 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
1947
1948 int avcodec_thread_init(AVCodecContext *s, int thread_count);
1949 void avcodec_thread_free(AVCodecContext *s);
1950 int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
1951 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
1952 //FIXME func typedef
1953
1954 /**
1955 * opens / inits the AVCodecContext.
1956 * not thread save!
1957 */
1958 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
1959
1960 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
1961 int *frame_size_ptr,
1962 uint8_t *buf, int buf_size);
1963 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
1964 int *got_picture_ptr,
1965 uint8_t *buf, int buf_size);
1966 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
1967 int *data_size_ptr,
1968 uint8_t *buf, int buf_size);
1969 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
1970 const short *samples);
1971 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
1972 const AVFrame *pict);
1973
1974 int avcodec_close(AVCodecContext *avctx);
1975
1976 void avcodec_register_all(void);
1977
1978 void avcodec_flush_buffers(AVCodecContext *avctx);
1979
1980 /* misc usefull functions */
1981
1982 /**
1983 * returns a single letter to describe the picture type
1984 */
1985 char av_get_pict_type_char(int pict_type);
1986
1987 /**
1988 * reduce a fraction.
1989 * this is usefull for framerate calculations
1990 * @param max the maximum allowed for dst_nom & dst_den
1991 * @return 1 if exact, 0 otherwise
1992 */
1993 int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max);
1994
1995 /**
1996 * rescale a 64bit integer.
1997 * a simple a*b/c isnt possible as it can overflow
1998 */
1999 int64_t av_rescale(int64_t a, int64_t b, int64_t c);
2000
2001
2002 /**
2003 * Interface for 0.5.0 version
2004 *
2005 * do not even think about it's usage for this moment
2006 */
2007
2008 typedef struct {
2009 /// compressed size used from given memory buffer
2010 int size;
2011 /// I/P/B frame type
2012 int frame_type;
2013 } avc_enc_result_t;
2014
2015 /**
2016 * Commands
2017 * order can't be changed - once it was defined
2018 */
2019 typedef enum {
2020 // general commands
2021 AVC_OPEN_BY_NAME = 0xACA000,
2022 AVC_OPEN_BY_CODEC_ID,
2023 AVC_OPEN_BY_FOURCC,
2024 AVC_CLOSE,
2025
2026 AVC_FLUSH,
2027 // pin - struct { uint8_t* src, uint_t src_size }
2028 // pout - struct { AVPicture* img, consumed_bytes,
2029 AVC_DECODE,
2030 // pin - struct { AVPicture* img, uint8_t* dest, uint_t dest_size }
2031 // pout - uint_t used_from_dest_size
2032 AVC_ENCODE,
2033
2034 // query/get video commands
2035 AVC_GET_VERSION = 0xACB000,
2036 AVC_GET_WIDTH,
2037 AVC_GET_HEIGHT,
2038 AVC_GET_DELAY,
2039 AVC_GET_QUANT_TABLE,
2040 // ...
2041
2042 // query/get audio commands
2043 AVC_GET_FRAME_SIZE = 0xABC000,
2044
2045 // maybe define some simple structure which
2046 // might be passed to the user - but they can't
2047 // contain any codec specific parts and these
2048 // calls are usualy necessary only few times
2049
2050 // set video commands
2051 AVC_SET_WIDTH = 0xACD000,
2052 AVC_SET_HEIGHT,
2053
2054 // set video encoding commands
2055 AVC_SET_FRAME_RATE = 0xACD800,
2056 AVC_SET_QUALITY,
2057 AVC_SET_HURRY_UP,
2058
2059 // set audio commands
2060 AVC_SET_SAMPLE_RATE = 0xACE000,
2061 AVC_SET_CHANNELS,
2062
2063 } avc_cmd_t;
2064
2065 /**
2066 * \param handle allocated private structure by libavcodec
2067 * for initialization pass NULL - will be returned pout
2068 * user is supposed to know nothing about its structure
2069 * \param cmd type of operation to be performed
2070 * \param pint input parameter
2071 * \param pout output parameter
2072 *
2073 * \returns command status - eventually for query command it might return
2074 * integer resulting value
2075 */
2076 int avcodec(void* handle, avc_cmd_t cmd, void* pin, void* pout);
2077
2078 /* frame parsing */
2079 typedef struct AVCodecParserContext {
2080 void *priv_data;
2081 struct AVCodecParser *parser;
2082 int64_t frame_offset; /* offset of the current frame */
2083 int64_t cur_offset; /* current offset
2084 (incremented by each av_parser_parse()) */
2085 int64_t last_frame_offset; /* offset of the last frame */
2086 /* video info */
2087 int pict_type; /* XXX: put it back in AVCodecContext */
2088 int repeat_pict; /* XXX: put it back in AVCodecContext */
2089 int64_t pts; /* pts of the current frame */
2090 int64_t dts; /* dts of the current frame */
2091
2092 /* private data */
2093 int64_t last_pts;
2094 int64_t last_dts;
2095 int fetch_timestamp;
2096
2097 #define AV_PARSER_PTS_NB 4
2098 int cur_frame_start_index;
2099 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2100 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2101 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2102 } AVCodecParserContext;
2103
2104 typedef struct AVCodecParser {
2105 int codec_ids[3]; /* several codec IDs are permitted */
2106 int priv_data_size;
2107 int (*parser_init)(AVCodecParserContext *s);
2108 int (*parser_parse)(AVCodecParserContext *s,
2109 AVCodecContext *avctx,
2110 uint8_t **poutbuf, int *poutbuf_size,
2111 const uint8_t *buf, int buf_size);
2112 void (*parser_close)(AVCodecParserContext *s);
2113 struct AVCodecParser *next;
2114 } AVCodecParser;
2115
2116 extern AVCodecParser *av_first_parser;
2117
2118 void av_register_codec_parser(AVCodecParser *parser);
2119 AVCodecParserContext *av_parser_init(int codec_id);
2120 int av_parser_parse(AVCodecParserContext *s,
2121 AVCodecContext *avctx,
2122 uint8_t **poutbuf, int *poutbuf_size,
2123 const uint8_t *buf, int buf_size,
2124 int64_t pts, int64_t dts);
2125 void av_parser_close(AVCodecParserContext *s);
2126
2127 extern AVCodecParser mpegvideo_parser;
2128 extern AVCodecParser mpeg4video_parser;
2129 extern AVCodecParser h261_parser;
2130 extern AVCodecParser h263_parser;
2131 extern AVCodecParser h264_parser;
2132 extern AVCodecParser mpegaudio_parser;
2133 extern AVCodecParser ac3_parser;
2134
2135 /* memory */
2136 void *av_malloc(unsigned int size);
2137 void *av_mallocz(unsigned int size);
2138 void *av_realloc(void *ptr, unsigned int size);
2139 void av_free(void *ptr);
2140 char *av_strdup(const char *s);
2141 void av_freep(void *ptr);
2142 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2143 /* for static data only */
2144 /* call av_free_static to release all staticaly allocated tables */
2145 void av_free_static(void);
2146 void *av_mallocz_static(unsigned int size);
2147
2148 /* add by bero : in adx.c */
2149 int is_adx(const unsigned char *buf,size_t bufsize);
2150
2151 void img_copy(AVPicture *dst, const AVPicture *src,
2152 int pix_fmt, int width, int height);
2153
2154 /* av_log API */
2155
2156 #include <stdarg.h>
2157
2158 #define AV_LOG_QUIET -1
2159 #define AV_LOG_ERROR 0
2160 #define AV_LOG_INFO 1
2161 #define AV_LOG_DEBUG 2
2162
2163 extern void av_log(void*, int level, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 3, 4)));
2164 extern void av_vlog(void*, int level, const char *fmt, va_list);
2165 extern int av_log_get_level(void);
2166 extern void av_log_set_level(int);
2167 extern void av_log_set_callback(void (*)(void*, int, const char*, va_list));
2168
2169 /* endian macros */
2170 #if !defined(BE_16) || !defined(BE_32) || !defined(LE_16) || !defined(LE_32)
2171 #define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
2172 #define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
2173 (((uint8_t*)(x))[1] << 16) | \
2174 (((uint8_t*)(x))[2] << 8) | \
2175 ((uint8_t*)(x))[3])
2176 #define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
2177 #define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \
2178 (((uint8_t*)(x))[2] << 16) | \
2179 (((uint8_t*)(x))[1] << 8) | \
2180 ((uint8_t*)(x))[0])
2181 #endif
2182
2183 #ifdef __cplusplus
2184 }
2185 #endif
2186
2187 #endif /* AVCODEC_H */