av_log() patch by (Michel Bardiaux <mbardiaux at peaktime 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 4706
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: unused\
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: unused\
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 #define FF_QSCALE_TYPE_MPEG1 0
543 #define FF_QSCALE_TYPE_MPEG2 1
544
545 #define FF_BUFFER_TYPE_INTERNAL 1
546 #define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
547 #define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewher else, dont dealloc image (data/base)
548 #define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, dont dealloc anything
549
550
551 #define FF_I_TYPE 1 // Intra
552 #define FF_P_TYPE 2 // Predicted
553 #define FF_B_TYPE 3 // Bi-dir predicted
554 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
555 #define FF_SI_TYPE 5
556 #define FF_SP_TYPE 6
557
558 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore)
559 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
560 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
561 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
562
563 /**
564 * Audio Video Frame.
565 */
566 typedef struct AVFrame {
567 FF_COMMON_FRAME
568 } AVFrame;
569
570 #define DEFAULT_FRAME_RATE_BASE 1001000
571
572 /**
573 * Used by av_log
574 */
575 typedef struct AVCLASS AVClass;
576 struct AVCLASS {
577 const char* class_name;
578 const char* (*item_name)(void*); /* actually passing a pointer to an AVCodecContext
579 or AVFormatContext, which begin with an AVClass.
580 Needed because av_log is in libavcodec and has no visibility
581 of AVIn/OutputFormat */
582 };
583
584 /**
585 * main external api structure.
586 */
587 typedef struct AVCodecContext {
588 /**
589 * Info on struct for av_log
590 * - set by avcodec_alloc_context
591 */
592 AVClass class;
593 /**
594 * the average bitrate.
595 * - encoding: set by user. unused for constant quantizer encoding
596 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
597 */
598 int bit_rate;
599
600 /**
601 * number of bits the bitstream is allowed to diverge from the reference.
602 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
603 * - encoding: set by user. unused for constant quantizer encoding
604 * - decoding: unused
605 */
606 int bit_rate_tolerance;
607
608 /**
609 * CODEC_FLAG_*.
610 * - encoding: set by user.
611 * - decoding: set by user.
612 */
613 int flags;
614
615 /**
616 * some codecs needs additionnal format info. It is stored here
617 * - encoding: set by user.
618 * - decoding: set by lavc. (FIXME is this ok?)
619 */
620 int sub_id;
621
622 /**
623 * motion estimation algorithm used for video coding.
624 * - encoding: MUST be set by user.
625 * - decoding: unused
626 */
627 int me_method;
628
629 /**
630 * some codecs need / can use extra-data like huffman tables.
631 * mjpeg: huffman tables
632 * rv10: additional flags
633 * mpeg4: global headers (they can be in the bitstream or here)
634 * - encoding: set/allocated/freed by lavc.
635 * - decoding: set/allocated/freed by user.
636 */
637 void *extradata;
638 int extradata_size;
639
640 /* video only */
641 /**
642 * frames per sec multiplied by frame_rate_base.
643 * for variable fps this is the precission, so if the timestamps
644 * can be specified in msec precssion then this is 1000*frame_rate_base
645 * - encoding: MUST be set by user
646 * - decoding: set by lavc. 0 or the frame_rate if available
647 */
648 int frame_rate;
649
650 /**
651 * width / height.
652 * - encoding: MUST be set by user.
653 * - decoding: set by user if known, codec should override / dynamically change if needed
654 */
655 int width, height;
656
657 #define FF_ASPECT_EXTENDED 15
658
659 /**
660 * the number of pictures in a group of pitures, or 0 for intra_only.
661 * - encoding: set by user.
662 * - decoding: unused
663 */
664 int gop_size;
665
666 /**
667 * pixel format, see PIX_FMT_xxx.
668 * - encoding: FIXME: used by ffmpeg to decide whether an pix_fmt
669 * conversion is in order. This only works for
670 * codecs with one supported pix_fmt, we should
671 * do something for a generic case as well.
672 * - decoding: set by lavc.
673 */
674 enum PixelFormat pix_fmt;
675
676 /**
677 * Frame rate emulation. If not zero lower layer (i.e. format handler)
678 * has to read frames at native frame rate.
679 * - encoding: set by user.
680 * - decoding: unused.
681 */
682 int rate_emu;
683
684 /**
685 * if non NULL, 'draw_horiz_band' is called by the libavcodec
686 * decoder to draw an horizontal band. It improve cache usage. Not
687 * all codecs can do that. You must check the codec capabilities
688 * before
689 * - encoding: unused
690 * - decoding: set by user.
691 * @param height the height of the slice
692 * @param y the y position of the slice
693 * @param type 1->top field, 2->bottom field, 3->frame
694 * @param offset offset into the AVFrame.data from which the slice should be read
695 */
696 void (*draw_horiz_band)(struct AVCodecContext *s,
697 const AVFrame *src, int offset[4],
698 int y, int type, int height);
699
700 /* audio only */
701 int sample_rate; ///< samples per sec
702 int channels;
703 int sample_fmt; ///< sample format, currenly unused
704
705 /* the following data should not be initialized */
706 int frame_size; ///< in samples, initialized when calling 'init'
707 int frame_number; ///< audio or video frame number
708 int real_pict_num; ///< returns the real picture number of previous encoded frame
709
710 /**
711 * number of frames the decoded output will be delayed relative to
712 * the encoded input.
713 * - encoding: set by lavc.
714 * - decoding: unused
715 */
716 int delay;
717
718 /* - encoding parameters */
719 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
720 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
721
722 /**
723 * minimum quantizer.
724 * - encoding: set by user.
725 * - decoding: unused
726 */
727 int qmin;
728
729 /**
730 * maximum quantizer.
731 * - encoding: set by user.
732 * - decoding: unused
733 */
734 int qmax;
735
736 /**
737 * maximum quantizer difference etween frames.
738 * - encoding: set by user.
739 * - decoding: unused
740 */
741 int max_qdiff;
742
743 /**
744 * maximum number of b frames between non b frames.
745 * note: the output will be delayed by max_b_frames+1 relative to the input
746 * - encoding: set by user.
747 * - decoding: unused
748 */
749 int max_b_frames;
750
751 /**
752 * qscale factor between ip and b frames.
753 * - encoding: set by user.
754 * - decoding: unused
755 */
756 float b_quant_factor;
757
758 /** obsolete FIXME remove */
759 int rc_strategy;
760 int b_frame_strategy;
761
762 /**
763 * hurry up amount.
764 * - encoding: unused
765 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
766 */
767 int hurry_up;
768
769 struct AVCodec *codec;
770
771 void *priv_data;
772
773 /* unused, FIXME remove*/
774 int rtp_mode;
775
776 int rtp_payload_size; /* The size of the RTP payload, the coder will */
777 /* do it's best to deliver a chunk with size */
778 /* below rtp_payload_size, the chunk will start */
779 /* with a start code on some codecs like H.263 */
780 /* This doesn't take account of any particular */
781 /* headers inside the transmited RTP payload */
782
783
784 /* The RTP callcack: This function is called */
785 /* every time the encoder as a packet to send */
786 /* Depends on the encoder if the data starts */
787 /* with a Start Code (it should) H.263 does */
788 void (*rtp_callback)(void *data, int size, int packet_number);
789
790 /* statistics, used for 2-pass encoding */
791 int mv_bits;
792 int header_bits;
793 int i_tex_bits;
794 int p_tex_bits;
795 int i_count;
796 int p_count;
797 int skip_count;
798 int misc_bits;
799
800 /**
801 * number of bits used for the previously encoded frame.
802 * - encoding: set by lavc
803 * - decoding: unused
804 */
805 int frame_bits;
806
807 /**
808 * private data of the user, can be used to carry app specific stuff.
809 * - encoding: set by user
810 * - decoding: set by user
811 */
812 void *opaque;
813
814 char codec_name[32];
815 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
816 enum CodecID codec_id; /* see CODEC_ID_xxx */
817
818 /**
819 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
820 * this is used to workaround some encoder bugs
821 * - encoding: set by user, if not then the default based on codec_id will be used
822 * - decoding: set by user, will be converted to upper case by lavc during init
823 */
824 unsigned int codec_tag;
825
826 /**
827 * workaround bugs in encoders which sometimes cannot be detected automatically.
828 * - encoding: unused
829 * - decoding: set by user
830 */
831 int workaround_bugs;
832 #define FF_BUG_AUTODETECT 1 ///< autodetection
833 #define FF_BUG_OLD_MSMPEG4 2
834 #define FF_BUG_XVID_ILACE 4
835 #define FF_BUG_UMP4 8
836 #define FF_BUG_NO_PADDING 16
837 #define FF_BUG_AC_VLC 0 ///< will be removed, libavcodec can now handle these non compliant files by default
838 #define FF_BUG_QPEL_CHROMA 64
839 #define FF_BUG_STD_QPEL 128
840 #define FF_BUG_QPEL_CHROMA2 256
841 #define FF_BUG_DIRECT_BLOCKSIZE 512
842 #define FF_BUG_EDGE 1024
843 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
844
845 /**
846 * luma single coeff elimination threshold.
847 * - encoding: set by user
848 * - decoding: unused
849 */
850 int luma_elim_threshold;
851
852 /**
853 * chroma single coeff elimination threshold.
854 * - encoding: set by user
855 * - decoding: unused
856 */
857 int chroma_elim_threshold;
858
859 /**
860 * strictly follow the std (MPEG4, ...).
861 * - encoding: set by user
862 * - decoding: unused
863 */
864 int strict_std_compliance;
865
866 /**
867 * qscale offset between ip and b frames.
868 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
869 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
870 * - encoding: set by user.
871 * - decoding: unused
872 */
873 float b_quant_offset;
874
875 /**
876 * error resilience higher values will detect more errors but may missdetect
877 * some more or less valid parts as errors.
878 * - encoding: unused
879 * - decoding: set by user
880 */
881 int error_resilience;
882 #define FF_ER_CAREFULL 1
883 #define FF_ER_COMPLIANT 2
884 #define FF_ER_AGGRESSIVE 3
885 #define FF_ER_VERY_AGGRESSIVE 4
886
887 /**
888 * called at the beginning of each frame to get a buffer for it.
889 * if pic.reference is set then the frame will be read later by lavc
890 * width and height should be rounded up to the next multiple of 16
891 * - encoding: unused
892 * - decoding: set by lavc, user can override
893 */
894 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
895
896 /**
897 * called to release buffers which where allocated with get_buffer.
898 * a released buffer can be reused in get_buffer()
899 * pic.data[*] must be set to NULL
900 * - encoding: unused
901 * - decoding: set by lavc, user can override
902 */
903 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
904
905 /**
906 * is 1 if the decoded stream contains b frames, 0 otherwise.
907 * - encoding: unused
908 * - decoding: set by lavc
909 */
910 int has_b_frames;
911
912 int block_align; ///< used by some WAV based audio codecs
913
914 int parse_only; /* - decoding only: if true, only parsing is done
915 (function avcodec_parse_frame()). The frame
916 data is returned. Only MPEG codecs support this now. */
917
918 /**
919 * 0-> h263 quant 1-> mpeg quant.
920 * - encoding: set by user.
921 * - decoding: unused
922 */
923 int mpeg_quant;
924
925 /**
926 * pass1 encoding statistics output buffer.
927 * - encoding: set by lavc
928 * - decoding: unused
929 */
930 char *stats_out;
931
932 /**
933 * pass2 encoding statistics input buffer.
934 * concatenated stuff from stats_out of pass1 should be placed here
935 * - encoding: allocated/set/freed by user
936 * - decoding: unused
937 */
938 char *stats_in;
939
940 /**
941 * ratecontrol qmin qmax limiting method.
942 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
943 * - encoding: set by user.
944 * - decoding: unused
945 */
946 float rc_qsquish;
947
948 float rc_qmod_amp;
949 int rc_qmod_freq;
950
951 /**
952 * ratecontrol override, see RcOverride.
953 * - encoding: allocated/set/freed by user.
954 * - decoding: unused
955 */
956 RcOverride *rc_override;
957 int rc_override_count;
958
959 /**
960 * rate control equation.
961 * - encoding: set by user
962 * - decoding: unused
963 */
964 char *rc_eq;
965
966 /**
967 * maximum bitrate.
968 * - encoding: set by user.
969 * - decoding: unused
970 */
971 int rc_max_rate;
972
973 /**
974 * minimum bitrate.
975 * - encoding: set by user.
976 * - decoding: unused
977 */
978 int rc_min_rate;
979
980 /**
981 * decoder bitstream buffer size.
982 * - encoding: set by user.
983 * - decoding: unused
984 */
985 int rc_buffer_size;
986 float rc_buffer_aggressivity;
987
988 /**
989 * qscale factor between p and i frames.
990 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
991 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
992 * - encoding: set by user.
993 * - decoding: unused
994 */
995 float i_quant_factor;
996
997 /**
998 * qscale offset between p and i frames.
999 * - encoding: set by user.
1000 * - decoding: unused
1001 */
1002 float i_quant_offset;
1003
1004 /**
1005 * initial complexity for pass1 ratecontrol.
1006 * - encoding: set by user.
1007 * - decoding: unused
1008 */
1009 float rc_initial_cplx;
1010
1011 /**
1012 * dct algorithm, see FF_DCT_* below.
1013 * - encoding: set by user
1014 * - decoding: unused
1015 */
1016 int dct_algo;
1017 #define FF_DCT_AUTO 0
1018 #define FF_DCT_FASTINT 1
1019 #define FF_DCT_INT 2
1020 #define FF_DCT_MMX 3
1021 #define FF_DCT_MLIB 4
1022 #define FF_DCT_ALTIVEC 5
1023 #define FF_DCT_FAAN 6
1024
1025 /**
1026 * luminance masking (0-> disabled).
1027 * - encoding: set by user
1028 * - decoding: unused
1029 */
1030 float lumi_masking;
1031
1032 /**
1033 * temporary complexity masking (0-> disabled).
1034 * - encoding: set by user
1035 * - decoding: unused
1036 */
1037 float temporal_cplx_masking;
1038
1039 /**
1040 * spatial complexity masking (0-> disabled).
1041 * - encoding: set by user
1042 * - decoding: unused
1043 */
1044 float spatial_cplx_masking;
1045
1046 /**
1047 * p block masking (0-> disabled).
1048 * - encoding: set by user
1049 * - decoding: unused
1050 */
1051 float p_masking;
1052
1053 /**
1054 * darkness masking (0-> disabled).
1055 * - encoding: set by user
1056 * - decoding: unused
1057 */
1058 float dark_masking;
1059
1060
1061 /* for binary compatibility */
1062 int unused;
1063
1064 /**
1065 * idct algorithm, see FF_IDCT_* below.
1066 * - encoding: set by user
1067 * - decoding: set by user
1068 */
1069 int idct_algo;
1070 #define FF_IDCT_AUTO 0
1071 #define FF_IDCT_INT 1
1072 #define FF_IDCT_SIMPLE 2
1073 #define FF_IDCT_SIMPLEMMX 3
1074 #define FF_IDCT_LIBMPEG2MMX 4
1075 #define FF_IDCT_PS2 5
1076 #define FF_IDCT_MLIB 6
1077 #define FF_IDCT_ARM 7
1078 #define FF_IDCT_ALTIVEC 8
1079 #define FF_IDCT_SH4 9
1080 #define FF_IDCT_SIMPLEARM 10
1081
1082 /**
1083 * slice count.
1084 * - encoding: set by lavc
1085 * - decoding: set by user (or 0)
1086 */
1087 int slice_count;
1088 /**
1089 * slice offsets in the frame in bytes.
1090 * - encoding: set/allocated by lavc
1091 * - decoding: set/allocated by user (or NULL)
1092 */
1093 int *slice_offset;
1094
1095 /**
1096 * error concealment flags.
1097 * - encoding: unused
1098 * - decoding: set by user
1099 */
1100 int error_concealment;
1101 #define FF_EC_GUESS_MVS 1
1102 #define FF_EC_DEBLOCK 2
1103
1104 /**
1105 * dsp_mask could be add used to disable unwanted CPU features
1106 * CPU features (i.e. MMX, SSE. ...)
1107 *
1108 * with FORCE flag you may instead enable given CPU features
1109 * (Dangerous: usable in case of misdetection, improper usage however will
1110 * result into program crash)
1111 */
1112 unsigned dsp_mask;
1113 #define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
1114 /* lower 16 bits - CPU features */
1115 #ifdef HAVE_MMX
1116 #define FF_MM_MMX 0x0001 /* standard MMX */
1117 #define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
1118 #define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
1119 #define FF_MM_SSE 0x0008 /* SSE functions */
1120 #define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
1121 #endif /* HAVE_MMX */
1122
1123 /**
1124 * bits per sample/pixel from the demuxer (needed for huffyuv).
1125 * - encoding: set by lavc
1126 * - decoding: set by user
1127 */
1128 int bits_per_sample;
1129
1130 /**
1131 * prediction method (needed for huffyuv).
1132 * - encoding: set by user
1133 * - decoding: unused
1134 */
1135 int prediction_method;
1136 #define FF_PRED_LEFT 0
1137 #define FF_PRED_PLANE 1
1138 #define FF_PRED_MEDIAN 2
1139
1140 /**
1141 * sample aspect ratio (0 if unknown).
1142 * numerator and denominator must be relative prime and smaller then 256 for some video standards
1143 * - encoding: set by user.
1144 * - decoding: set by lavc.
1145 */
1146 AVRational sample_aspect_ratio;
1147
1148 /**
1149 * the picture in the bitstream.
1150 * - encoding: set by lavc
1151 * - decoding: set by lavc
1152 */
1153 AVFrame *coded_frame;
1154
1155 /**
1156 * debug.
1157 * - encoding: set by user.
1158 * - decoding: set by user.
1159 */
1160 int debug;
1161 #define FF_DEBUG_PICT_INFO 1
1162 #define FF_DEBUG_RC 2
1163 #define FF_DEBUG_BITSTREAM 4
1164 #define FF_DEBUG_MB_TYPE 8
1165 #define FF_DEBUG_QP 16
1166 #define FF_DEBUG_MV 32
1167 #define FF_DEBUG_DCT_COEFF 0x00000040
1168 #define FF_DEBUG_SKIP 0x00000080
1169 #define FF_DEBUG_STARTCODE 0x00000100
1170 #define FF_DEBUG_PTS 0x00000200
1171 #define FF_DEBUG_ER 0x00000400
1172 #define FF_DEBUG_MMCO 0x00000800
1173 #define FF_DEBUG_BUGS 0x00001000
1174 #define FF_DEBUG_VIS_QP 0x00002000
1175 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1176
1177 /**
1178 * debug.
1179 * - encoding: set by user.
1180 * - decoding: set by user.
1181 */
1182 int debug_mv;
1183 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1184 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1185 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1186
1187 /**
1188 * error.
1189 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1190 * - decoding: unused
1191 */
1192 uint64_t error[4];
1193
1194 /**
1195 * minimum MB quantizer.
1196 * - encoding: set by user.
1197 * - decoding: unused
1198 */
1199 int mb_qmin;
1200
1201 /**
1202 * maximum MB quantizer.
1203 * - encoding: set by user.
1204 * - decoding: unused
1205 */
1206 int mb_qmax;
1207
1208 /**
1209 * motion estimation compare function.
1210 * - encoding: set by user.
1211 * - decoding: unused
1212 */
1213 int me_cmp;
1214 /**
1215 * subpixel motion estimation compare function.
1216 * - encoding: set by user.
1217 * - decoding: unused
1218 */
1219 int me_sub_cmp;
1220 /**
1221 * macroblock compare function (not supported yet).
1222 * - encoding: set by user.
1223 * - decoding: unused
1224 */
1225 int mb_cmp;
1226 /**
1227 * interlaced dct compare function
1228 * - encoding: set by user.
1229 * - decoding: unused
1230 */
1231 int ildct_cmp;
1232 #define FF_CMP_SAD 0
1233 #define FF_CMP_SSE 1
1234 #define FF_CMP_SATD 2
1235 #define FF_CMP_DCT 3
1236 #define FF_CMP_PSNR 4
1237 #define FF_CMP_BIT 5
1238 #define FF_CMP_RD 6
1239 #define FF_CMP_ZERO 7
1240 #define FF_CMP_VSAD 8
1241 #define FF_CMP_VSSE 9
1242 #define FF_CMP_CHROMA 256
1243
1244 /**
1245 * ME diamond size & shape.
1246 * - encoding: set by user.
1247 * - decoding: unused
1248 */
1249 int dia_size;
1250
1251 /**
1252 * amount of previous MV predictors (2a+1 x 2a+1 square).
1253 * - encoding: set by user.
1254 * - decoding: unused
1255 */
1256 int last_predictor_count;
1257
1258 /**
1259 * pre pass for motion estimation.
1260 * - encoding: set by user.
1261 * - decoding: unused
1262 */
1263 int pre_me;
1264
1265 /**
1266 * motion estimation pre pass compare function.
1267 * - encoding: set by user.
1268 * - decoding: unused
1269 */
1270 int me_pre_cmp;
1271
1272 /**
1273 * ME pre pass diamond size & shape.
1274 * - encoding: set by user.
1275 * - decoding: unused
1276 */
1277 int pre_dia_size;
1278
1279 /**
1280 * subpel ME quality.
1281 * - encoding: set by user.
1282 * - decoding: unused
1283 */
1284 int me_subpel_quality;
1285
1286 /**
1287 * callback to negotiate the pixelFormat.
1288 * @param fmt is the list of formats which are supported by the codec,
1289 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1290 * the first is allways the native one
1291 * @return the choosen format
1292 * - encoding: unused
1293 * - decoding: set by user, if not set then the native format will always be choosen
1294 */
1295 enum PixelFormat (*get_format)(struct AVCodecContext *s, enum PixelFormat * fmt);
1296
1297 /**
1298 * DTG active format information (additionnal aspect ratio
1299 * information only used in DVB MPEG2 transport streams). 0 if
1300 * not set.
1301 *
1302 * - encoding: unused.
1303 * - decoding: set by decoder
1304 */
1305 int dtg_active_format;
1306 #define FF_DTG_AFD_SAME 8
1307 #define FF_DTG_AFD_4_3 9
1308 #define FF_DTG_AFD_16_9 10
1309 #define FF_DTG_AFD_14_9 11
1310 #define FF_DTG_AFD_4_3_SP_14_9 13
1311 #define FF_DTG_AFD_16_9_SP_14_9 14
1312 #define FF_DTG_AFD_SP_4_3 15
1313
1314 /**
1315 * Maximum motion estimation search range in subpel units.
1316 * if 0 then no limit
1317 *
1318 * - encoding: set by user.
1319 * - decoding: unused.
1320 */
1321 int me_range;
1322
1323 /**
1324 * frame_rate_base.
1325 * for variable fps this is 1
1326 * - encoding: set by user.
1327 * - decoding: set by lavc.
1328 * @todo move this after frame_rate
1329 */
1330
1331 int frame_rate_base;
1332 /**
1333 * intra quantizer bias.
1334 * - encoding: set by user.
1335 * - decoding: unused
1336 */
1337 int intra_quant_bias;
1338 #define FF_DEFAULT_QUANT_BIAS 999999
1339
1340 /**
1341 * inter quantizer bias.
1342 * - encoding: set by user.
1343 * - decoding: unused
1344 */
1345 int inter_quant_bias;
1346
1347 /**
1348 * color table ID.
1349 * - encoding: unused.
1350 * - decoding: which clrtable should be used for 8bit RGB images
1351 * table have to be stored somewhere FIXME
1352 */
1353 int color_table_id;
1354
1355 /**
1356 * internal_buffer count.
1357 * Dont touch, used by lavc default_get_buffer()
1358 */
1359 int internal_buffer_count;
1360
1361 /**
1362 * internal_buffers.
1363 * Dont touch, used by lavc default_get_buffer()
1364 */
1365 void *internal_buffer;
1366
1367 #define FF_LAMBDA_SHIFT 7
1368 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1369 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1370 #define FF_LAMBDA_MAX (256*128-1)
1371
1372 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1373 /**
1374 * global quality for codecs which cannot change it per frame.
1375 * this should be proportional to MPEG1/2/4 qscale.
1376 * - encoding: set by user.
1377 * - decoding: unused
1378 */
1379 int global_quality;
1380
1381 #define FF_CODER_TYPE_VLC 0
1382 #define FF_CODER_TYPE_AC 1
1383 /**
1384 * coder type
1385 * - encoding: set by user.
1386 * - decoding: unused
1387 */
1388 int coder_type;
1389
1390 /**
1391 * context model
1392 * - encoding: set by user.
1393 * - decoding: unused
1394 */
1395 int context_model;
1396
1397 /**
1398 * slice flags
1399 * - encoding: unused
1400 * - decoding: set by user.
1401 */
1402 int slice_flags;
1403 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1404 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1405 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1406
1407 /**
1408 * XVideo Motion Acceleration
1409 * - encoding: forbidden
1410 * - decoding: set by decoder
1411 */
1412 int xvmc_acceleration;
1413
1414 /**
1415 * macroblock decision mode
1416 * - encoding: set by user.
1417 * - decoding: unused
1418 */
1419 int mb_decision;
1420 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1421 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1422 #define FF_MB_DECISION_RD 2 ///< rate distoration
1423
1424 /**
1425 * custom intra quantization matrix
1426 * - encoding: set by user, can be NULL
1427 * - decoding: set by lavc
1428 */
1429 uint16_t *intra_matrix;
1430
1431 /**
1432 * custom inter quantization matrix
1433 * - encoding: set by user, can be NULL
1434 * - decoding: set by lavc
1435 */
1436 uint16_t *inter_matrix;
1437
1438 /**
1439 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1440 * this is used to workaround some encoder bugs
1441 * - encoding: unused
1442 * - decoding: set by user, will be converted to upper case by lavc during init
1443 */
1444 unsigned int stream_codec_tag;
1445
1446 /**
1447 * scene change detection threshold.
1448 * 0 is default, larger means fewer detected scene changes
1449 * - encoding: set by user.
1450 * - decoding: unused
1451 */
1452 int scenechange_threshold;
1453
1454 /**
1455 * minimum lagrange multipler
1456 * - encoding: set by user.
1457 * - decoding: unused
1458 */
1459 int lmin;
1460
1461 /**
1462 * maximum lagrange multipler
1463 * - encoding: set by user.
1464 * - decoding: unused
1465 */
1466 int lmax;
1467
1468 /**
1469 * Palette control structure
1470 * - encoding: ??? (no palette-enabled encoder yet)
1471 * - decoding: set by user.
1472 */
1473 struct AVPaletteControl *palctrl;
1474
1475 /**
1476 * noise reduction strength
1477 * - encoding: set by user.
1478 * - decoding: unused
1479 */
1480 int noise_reduction;
1481
1482 /**
1483 * called at the beginning of a frame to get cr buffer for it.
1484 * buffer type (size, hints) must be the same. lavc won't check it.
1485 * lavc will pass previous buffer in pic, function should return
1486 * same buffer or new buffer with old frame "painted" into it.
1487 * if pic.data[0] == NULL must behave like get_buffer().
1488 * - encoding: unused
1489 * - decoding: set by lavc, user can override
1490 */
1491 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1492
1493 /**
1494 * number of bits which should be loaded into the rc buffer before decoding starts
1495 * - encoding: set by user.
1496 * - decoding: unused
1497 */
1498 int rc_initial_buffer_occupancy;
1499
1500 /**
1501 *
1502 * - encoding: set by user.
1503 * - decoding: unused
1504 */
1505 int inter_threshold;
1506
1507 /**
1508 * CODEC_FLAG2_*.
1509 * - encoding: set by user.
1510 * - decoding: set by user.
1511 */
1512 int flags2;
1513
1514 /**
1515 * simulates errors in the bitstream to test error concealment.
1516 * - encoding: set by user.
1517 * - decoding: unused.
1518 */
1519 int error_rate;
1520
1521 /**
1522 * MP3 antialias algorithm, see FF_AA_* below.
1523 * - encoding: unused
1524 * - decoding: set by user
1525 */
1526 int antialias_algo;
1527 #define FF_AA_AUTO 0
1528 #define FF_AA_FASTINT 1 //not implemented yet
1529 #define FF_AA_INT 2
1530 #define FF_AA_FLOAT 3
1531 /**
1532 * Quantizer noise shaping.
1533 * - encoding: set by user
1534 * - decoding: unused
1535 */
1536 int quantizer_noise_shaping;
1537
1538 /**
1539 * Thread count.
1540 * is used to decide how many independant tasks should be passed to execute()
1541 * - encoding: set by user
1542 * - decoding: set by user
1543 */
1544 int thread_count;
1545
1546 /**
1547 * the codec may call this to execute several independant things. it will return only after
1548 * finishing all tasks, the user may replace this with some multithreaded implementation, the
1549 * default implementation will execute the parts serially
1550 * @param count the number of functions this will be identical to thread_count if possible
1551 * - encoding: set by lavc, user can override
1552 * - decoding: set by lavc, user can override
1553 */
1554 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1555
1556 /**
1557 * Thread opaque.
1558 * can be used by execute() to store some per AVCodecContext stuff.
1559 * - encoding: set by execute()
1560 * - decoding: set by execute()
1561 */
1562 void *thread_opaque;
1563 } AVCodecContext;
1564
1565
1566 /**
1567 * AVOption.
1568 */
1569 typedef struct AVOption {
1570 /** options' name */
1571 const char *name; /* if name is NULL, it indicates a link to next */
1572 /** short English text help or const struct AVOption* subpointer */
1573 const char *help; // const struct AVOption* sub;
1574 /** offset to context structure where the parsed value should be stored */
1575 int offset;
1576 /** options' type */
1577 int type;
1578 #define FF_OPT_TYPE_BOOL 1 ///< boolean - true,1,on (or simply presence)
1579 #define FF_OPT_TYPE_DOUBLE 2 ///< double
1580 #define FF_OPT_TYPE_INT 3 ///< integer
1581 #define FF_OPT_TYPE_STRING 4 ///< string (finished with \0)
1582 #define FF_OPT_TYPE_MASK 0x1f ///< mask for types - upper bits are various flags
1583 //#define FF_OPT_TYPE_EXPERT 0x20 // flag for expert option
1584 #define FF_OPT_TYPE_FLAG (FF_OPT_TYPE_BOOL | 0x40)
1585 #define FF_OPT_TYPE_RCOVERRIDE (FF_OPT_TYPE_STRING | 0x80)
1586 /** min value (min == max -> no limits) */
1587 double min;
1588 /** maximum value for double/int */
1589 double max;
1590 /** default boo [0,1]l/double/int value */
1591 double defval;
1592 /**
1593 * default string value (with optional semicolon delimited extra option-list
1594 * i.e. option1;option2;option3
1595 * defval might select other then first argument as default
1596 */
1597 const char *defstr;
1598 #define FF_OPT_MAX_DEPTH 10
1599 } AVOption;
1600
1601 /**
1602 * Parse option(s) and sets fields in passed structure
1603 * @param strct structure where the parsed results will be written
1604 * @param list list with AVOptions
1605 * @param opts string with options for parsing
1606 */
1607 int avoption_parse(void* strct, const AVOption* list, const char* opts);
1608
1609
1610 /**
1611 * AVCodec.
1612 */
1613 typedef struct AVCodec {
1614 const char *name;
1615 enum CodecType type;
1616 int id;
1617 int priv_data_size;
1618 int (*init)(AVCodecContext *);
1619 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
1620 int (*close)(AVCodecContext *);
1621 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
1622 uint8_t *buf, int buf_size);
1623 int capabilities;
1624 const AVOption *options;
1625 struct AVCodec *next;
1626 void (*flush)(AVCodecContext *);
1627 AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
1628 } AVCodec;
1629
1630 /**
1631 * four components are given, that's all.
1632 * the last component is alpha
1633 */
1634 typedef struct AVPicture {
1635 uint8_t *data[4];
1636 int linesize[4]; ///< number of bytes per line
1637 } AVPicture;
1638
1639 /**
1640 * AVPaletteControl
1641 * This structure defines a method for communicating palette changes
1642 * between and demuxer and a decoder.
1643 */
1644 #define AVPALETTE_SIZE 1024
1645 #define AVPALETTE_COUNT 256
1646 typedef struct AVPaletteControl {
1647
1648 /* demuxer sets this to 1 to indicate the palette has changed;
1649 * decoder resets to 0 */
1650 int palette_changed;
1651
1652 /* 4-byte ARGB palette entries, stored in native byte order; note that
1653 * the individual palette components should be on a 8-bit scale; if
1654 * the palette data comes from a IBM VGA native format, the component
1655 * data is probably 6 bits in size and needs to be scaled */
1656 unsigned int palette[AVPALETTE_COUNT];
1657
1658 } AVPaletteControl;
1659
1660 extern AVCodec ac3_encoder;
1661 extern AVCodec mp2_encoder;
1662 extern AVCodec mp3lame_encoder;
1663 extern AVCodec oggvorbis_encoder;
1664 extern AVCodec faac_encoder;
1665 extern AVCodec mpeg1video_encoder;
1666 extern AVCodec mpeg2video_encoder;
1667 extern AVCodec h263_encoder;
1668 extern AVCodec h263p_encoder;
1669 extern AVCodec flv_encoder;
1670 extern AVCodec rv10_encoder;
1671 extern AVCodec rv20_encoder;
1672 extern AVCodec mjpeg_encoder;
1673 extern AVCodec ljpeg_encoder;
1674 extern AVCodec mpeg4_encoder;
1675 extern AVCodec msmpeg4v1_encoder;
1676 extern AVCodec msmpeg4v2_encoder;
1677 extern AVCodec msmpeg4v3_encoder;
1678 extern AVCodec wmv1_encoder;
1679 extern AVCodec wmv2_encoder;
1680 extern AVCodec huffyuv_encoder;
1681 extern AVCodec h264_encoder;
1682 extern AVCodec asv1_encoder;
1683 extern AVCodec asv2_encoder;
1684 extern AVCodec vcr1_encoder;
1685 extern AVCodec ffv1_encoder;
1686 extern AVCodec mdec_encoder;
1687 extern AVCodec zlib_encoder;
1688
1689 extern AVCodec h263_decoder;
1690 extern AVCodec mpeg4_decoder;
1691 extern AVCodec msmpeg4v1_decoder;
1692 extern AVCodec msmpeg4v2_decoder;
1693 extern AVCodec msmpeg4v3_decoder;
1694 extern AVCodec wmv1_decoder;
1695 extern AVCodec wmv2_decoder;
1696 extern AVCodec mpeg1video_decoder;
1697 extern AVCodec mpeg2video_decoder;
1698 extern AVCodec mpegvideo_decoder;
1699 extern AVCodec mpeg_xvmc_decoder;
1700 extern AVCodec h263i_decoder;
1701 extern AVCodec flv_decoder;
1702 extern AVCodec rv10_decoder;
1703 extern AVCodec rv20_decoder;
1704 extern AVCodec svq1_decoder;
1705 extern AVCodec svq3_decoder;
1706 extern AVCodec dvvideo_decoder;
1707 extern AVCodec wmav1_decoder;
1708 extern AVCodec wmav2_decoder;
1709 extern AVCodec mjpeg_decoder;
1710 extern AVCodec mjpegb_decoder;
1711 extern AVCodec sp5x_decoder;
1712 extern AVCodec mp2_decoder;
1713 extern AVCodec mp3_decoder;
1714 extern AVCodec mace3_decoder;
1715 extern AVCodec mace6_decoder;
1716 extern AVCodec huffyuv_decoder;
1717 extern AVCodec oggvorbis_decoder;
1718 extern AVCodec cyuv_decoder;
1719 extern AVCodec h264_decoder;
1720 extern AVCodec indeo3_decoder;
1721 extern AVCodec vp3_decoder;
1722 extern AVCodec theora_decoder;
1723 extern AVCodec amr_nb_decoder;
1724 extern AVCodec amr_nb_encoder;
1725 extern AVCodec amr_wb_encoder;
1726 extern AVCodec amr_wb_decoder;
1727 extern AVCodec aac_decoder;
1728 extern AVCodec mpeg4aac_decoder;
1729 extern AVCodec asv1_decoder;
1730 extern AVCodec asv2_decoder;
1731 extern AVCodec vcr1_decoder;
1732 extern AVCodec cljr_decoder;
1733 extern AVCodec ffv1_decoder;
1734 extern AVCodec fourxm_decoder;
1735 extern AVCodec mdec_decoder;
1736 extern AVCodec roq_decoder;
1737 extern AVCodec interplay_video_decoder;
1738 extern AVCodec xan_wc3_decoder;
1739 extern AVCodec rpza_decoder;
1740 extern AVCodec cinepak_decoder;
1741 extern AVCodec msrle_decoder;
1742 extern AVCodec msvideo1_decoder;
1743 extern AVCodec vqa_decoder;
1744 extern AVCodec idcin_decoder;
1745 extern AVCodec eightbps_decoder;
1746 extern AVCodec smc_decoder;
1747 extern AVCodec flic_decoder;
1748 extern AVCodec vmdvideo_decoder;
1749 extern AVCodec vmdaudio_decoder;
1750 extern AVCodec truemotion1_decoder;
1751 extern AVCodec mszh_decoder;
1752 extern AVCodec zlib_decoder;
1753 extern AVCodec ra_144_decoder;
1754 extern AVCodec ra_288_decoder;
1755 extern AVCodec roq_dpcm_decoder;
1756 extern AVCodec interplay_dpcm_decoder;
1757 extern AVCodec xan_dpcm_decoder;
1758 extern AVCodec qtrle_decoder;
1759 extern AVCodec flac_decoder;
1760
1761 /* pcm codecs */
1762 #define PCM_CODEC(id, name) \
1763 extern AVCodec name ## _decoder; \
1764 extern AVCodec name ## _encoder
1765
1766 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
1767 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
1768 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
1769 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
1770 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
1771 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
1772 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
1773 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
1774
1775 /* adpcm codecs */
1776
1777 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
1778 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
1779 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
1780 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
1781 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
1782 PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
1783 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
1784 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
1785 PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
1786 PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
1787 PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
1788 PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
1789
1790 #undef PCM_CODEC
1791
1792 /* dummy raw video codec */
1793 extern AVCodec rawvideo_encoder;
1794 extern AVCodec rawvideo_decoder;
1795
1796 /* the following codecs use external GPL libs */
1797 extern AVCodec ac3_decoder;
1798
1799 /* resample.c */
1800
1801 struct ReSampleContext;
1802
1803 typedef struct ReSampleContext ReSampleContext;
1804
1805 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
1806 int output_rate, int input_rate);
1807 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
1808 void audio_resample_close(ReSampleContext *s);
1809
1810 /* YUV420 format is assumed ! */
1811
1812 struct ImgReSampleContext;
1813
1814 typedef struct ImgReSampleContext ImgReSampleContext;
1815
1816 ImgReSampleContext *img_resample_init(int output_width, int output_height,
1817 int input_width, int input_height);
1818
1819 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
1820 int iwidth, int iheight,
1821 int topBand, int bottomBand,
1822 int leftBand, int rightBand);
1823
1824 void img_resample(ImgReSampleContext *s,
1825 AVPicture *output, const AVPicture *input);
1826
1827 void img_resample_close(ImgReSampleContext *s);
1828
1829 /**
1830 * Allocate memory for a picture. Call avpicture_free to free it.
1831 *
1832 * @param picture the picture to be filled in.
1833 * @param pix_fmt the format of the picture.
1834 * @param width the width of the picture.
1835 * @param height the height of the picture.
1836 * @return 0 if successful, -1 if not.
1837 */
1838 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
1839
1840 /* Free a picture previously allocated by avpicture_alloc. */
1841 void avpicture_free(AVPicture *picture);
1842
1843 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
1844 int pix_fmt, int width, int height);
1845 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
1846 unsigned char *dest, int dest_size);
1847 int avpicture_get_size(int pix_fmt, int width, int height);
1848 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
1849 const char *avcodec_get_pix_fmt_name(int pix_fmt);
1850 enum PixelFormat avcodec_get_pix_fmt(const char* name);
1851
1852 #define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
1853 #define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
1854 #define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
1855 #define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
1856 #define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
1857 #define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
1858
1859 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
1860 int has_alpha);
1861 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
1862 int has_alpha, int *loss_ptr);
1863
1864 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
1865 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
1866 int img_get_alpha_info(const AVPicture *src,
1867 int pix_fmt, int width, int height);
1868
1869 /* convert among pixel formats */
1870 int img_convert(AVPicture *dst, int dst_pix_fmt,
1871 const AVPicture *src, int pix_fmt,
1872 int width, int height);
1873
1874 /* deinterlace a picture */
1875 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
1876 int pix_fmt, int width, int height);
1877
1878 /* external high level API */
1879
1880 extern AVCodec *first_avcodec;
1881
1882 /* returns LIBAVCODEC_VERSION_INT constant */
1883 unsigned avcodec_version(void);
1884 /* returns LIBAVCODEC_BUILD constant */
1885 unsigned avcodec_build(void);
1886 void avcodec_init(void);
1887
1888 void register_avcodec(AVCodec *format);
1889 AVCodec *avcodec_find_encoder(enum CodecID id);
1890 AVCodec *avcodec_find_encoder_by_name(const char *name);
1891 AVCodec *avcodec_find_decoder(enum CodecID id);
1892 AVCodec *avcodec_find_decoder_by_name(const char *name);
1893 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
1894
1895 void avcodec_get_context_defaults(AVCodecContext *s);
1896 AVCodecContext *avcodec_alloc_context(void);
1897 AVFrame *avcodec_alloc_frame(void);
1898
1899 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
1900 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
1901 void avcodec_default_free_buffers(AVCodecContext *s);
1902
1903 int avcodec_thread_init(AVCodecContext *s, int thread_count);
1904 void avcodec_thread_free(AVCodecContext *s);
1905 int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
1906 //FIXME func typedef
1907
1908 /**
1909 * opens / inits the AVCodecContext.
1910 * not thread save!
1911 */
1912 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
1913
1914 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
1915 int *frame_size_ptr,
1916 uint8_t *buf, int buf_size);
1917 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
1918 int *got_picture_ptr,
1919 uint8_t *buf, int buf_size);
1920 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
1921 int *data_size_ptr,
1922 uint8_t *buf, int buf_size);
1923 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
1924 const short *samples);
1925 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
1926 const AVFrame *pict);
1927
1928 int avcodec_close(AVCodecContext *avctx);
1929
1930 void avcodec_register_all(void);
1931
1932 void avcodec_flush_buffers(AVCodecContext *avctx);
1933
1934 /* misc usefull functions */
1935
1936 /**
1937 * returns a single letter to describe the picture type
1938 */
1939 char av_get_pict_type_char(int pict_type);
1940
1941 /**
1942 * reduce a fraction.
1943 * this is usefull for framerate calculations
1944 * @param max the maximum allowed for dst_nom & dst_den
1945 * @return 1 if exact, 0 otherwise
1946 */
1947 int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max);
1948
1949 /**
1950 * rescale a 64bit integer.
1951 * a simple a*b/c isnt possible as it can overflow
1952 */
1953 int64_t av_rescale(int64_t a, int b, int c);
1954
1955
1956 /**
1957 * Interface for 0.5.0 version
1958 *
1959 * do not even think about it's usage for this moment
1960 */
1961
1962 typedef struct {
1963 /// compressed size used from given memory buffer
1964 int size;
1965 /// I/P/B frame type
1966 int frame_type;
1967 } avc_enc_result_t;
1968
1969 /**
1970 * Commands
1971 * order can't be changed - once it was defined
1972 */
1973 typedef enum {
1974 // general commands
1975 AVC_OPEN_BY_NAME = 0xACA000,
1976 AVC_OPEN_BY_CODEC_ID,
1977 AVC_OPEN_BY_FOURCC,
1978 AVC_CLOSE,
1979
1980 AVC_FLUSH,
1981 // pin - struct { uint8_t* src, uint_t src_size }
1982 // pout - struct { AVPicture* img, consumed_bytes,
1983 AVC_DECODE,
1984 // pin - struct { AVPicture* img, uint8_t* dest, uint_t dest_size }
1985 // pout - uint_t used_from_dest_size
1986 AVC_ENCODE,
1987
1988 // query/get video commands
1989 AVC_GET_VERSION = 0xACB000,
1990 AVC_GET_WIDTH,
1991 AVC_GET_HEIGHT,
1992 AVC_GET_DELAY,
1993 AVC_GET_QUANT_TABLE,
1994 // ...
1995
1996 // query/get audio commands
1997 AVC_GET_FRAME_SIZE = 0xABC000,
1998
1999 // maybe define some simple structure which
2000 // might be passed to the user - but they can't
2001 // contain any codec specific parts and these
2002 // calls are usualy necessary only few times
2003
2004 // set video commands
2005 AVC_SET_WIDTH = 0xACD000,
2006 AVC_SET_HEIGHT,
2007
2008 // set video encoding commands
2009 AVC_SET_FRAME_RATE = 0xACD800,
2010 AVC_SET_QUALITY,
2011 AVC_SET_HURRY_UP,
2012
2013 // set audio commands
2014 AVC_SET_SAMPLE_RATE = 0xACE000,
2015 AVC_SET_CHANNELS,
2016
2017 } avc_cmd_t;
2018
2019 /**
2020 * \param handle allocated private structure by libavcodec
2021 * for initialization pass NULL - will be returned pout
2022 * user is supposed to know nothing about its structure
2023 * \param cmd type of operation to be performed
2024 * \param pint input parameter
2025 * \param pout output parameter
2026 *
2027 * \returns command status - eventually for query command it might return
2028 * integer resulting value
2029 */
2030 int avcodec(void* handle, avc_cmd_t cmd, void* pin, void* pout);
2031
2032 /* frame parsing */
2033 typedef struct AVCodecParserContext {
2034 void *priv_data;
2035 struct AVCodecParser *parser;
2036 int64_t frame_offset; /* offset of the current frame */
2037 int64_t cur_offset; /* current offset
2038 (incremented by each av_parser_parse()) */
2039 int64_t last_frame_offset; /* offset of the last frame */
2040 /* video info */
2041 int pict_type; /* XXX: put it back in AVCodecContext */
2042 int repeat_pict; /* XXX: put it back in AVCodecContext */
2043 int64_t pts; /* pts of the current frame */
2044 int64_t dts; /* dts of the current frame */
2045
2046 /* private data */
2047 int64_t last_pts;
2048 int64_t last_dts;
2049
2050 #define AV_PARSER_PTS_NB 4
2051 int cur_frame_start_index;
2052 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2053 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2054 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2055 } AVCodecParserContext;
2056
2057 typedef struct AVCodecParser {
2058 int codec_ids[3]; /* several codec IDs are permitted */
2059 int priv_data_size;
2060 int (*parser_init)(AVCodecParserContext *s);
2061 int (*parser_parse)(AVCodecParserContext *s,
2062 AVCodecContext *avctx,
2063 uint8_t **poutbuf, int *poutbuf_size,
2064 const uint8_t *buf, int buf_size);
2065 void (*parser_close)(AVCodecParserContext *s);
2066 struct AVCodecParser *next;
2067 } AVCodecParser;
2068
2069 extern AVCodecParser *av_first_parser;
2070
2071 void av_register_codec_parser(AVCodecParser *parser);
2072 AVCodecParserContext *av_parser_init(int codec_id);
2073 int av_parser_parse(AVCodecParserContext *s,
2074 AVCodecContext *avctx,
2075 uint8_t **poutbuf, int *poutbuf_size,
2076 const uint8_t *buf, int buf_size,
2077 int64_t pts, int64_t dts);
2078 void av_parser_close(AVCodecParserContext *s);
2079
2080 extern AVCodecParser mpegvideo_parser;
2081 extern AVCodecParser mpeg4video_parser;
2082 extern AVCodecParser h263_parser;
2083 extern AVCodecParser h264_parser;
2084 extern AVCodecParser mpegaudio_parser;
2085 extern AVCodecParser ac3_parser;
2086
2087 /* memory */
2088 void *av_malloc(unsigned int size);
2089 void *av_mallocz(unsigned int size);
2090 void *av_realloc(void *ptr, unsigned int size);
2091 void av_free(void *ptr);
2092 char *av_strdup(const char *s);
2093 void av_freep(void *ptr);
2094 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2095 /* for static data only */
2096 /* call av_free_static to release all staticaly allocated tables */
2097 void av_free_static(void);
2098 void *__av_mallocz_static(void** location, unsigned int size);
2099 #define av_mallocz_static(p, s) __av_mallocz_static((void **)(p), s)
2100
2101 /* add by bero : in adx.c */
2102 int is_adx(const unsigned char *buf,size_t bufsize);
2103
2104 void img_copy(AVPicture *dst, const AVPicture *src,
2105 int pix_fmt, int width, int height);
2106
2107 /* av_log API */
2108
2109 #include <stdarg.h>
2110
2111 #define AV_LOG_ERROR 0
2112 #define AV_LOG_INFO 1
2113 #define AV_LOG_DEBUG 2
2114
2115 extern void av_log(void*, int level, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 3, 4)));
2116 extern void av_vlog(void*, int level, const char *fmt, va_list);
2117 extern int av_log_get_level(void);
2118 extern void av_log_set_level(int);
2119 extern void av_log_set_callback(void (*)(void*, int, const char*, va_list));
2120
2121 #ifdef __cplusplus
2122 }
2123 #endif
2124
2125 #endif /* AVCODEC_H */