4088c978c008d4671b5916bec6224b0da1aa8d13
[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
16 #define LIBAVCODEC_VERSION_INT 0x000408
17 #define LIBAVCODEC_VERSION "0.4.8"
18 #define LIBAVCODEC_BUILD 4679
19 #define LIBAVCODEC_BUILD_STR "4679"
20
21 #define LIBAVCODEC_IDENT "FFmpeg" LIBAVCODEC_VERSION "b" LIBAVCODEC_BUILD_STR
22
23 enum CodecID {
24 CODEC_ID_NONE,
25 CODEC_ID_MPEG1VIDEO,
26 CODEC_ID_MPEG2VIDEO, /* prefered ID for MPEG Video 1 or 2 decoding */
27 CODEC_ID_MPEG2VIDEO_XVMC,
28 CODEC_ID_H263,
29 CODEC_ID_RV10,
30 CODEC_ID_MP2,
31 CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
32 CODEC_ID_VORBIS,
33 CODEC_ID_AC3,
34 CODEC_ID_MJPEG,
35 CODEC_ID_MJPEGB,
36 CODEC_ID_LJPEG,
37 CODEC_ID_MPEG4,
38 CODEC_ID_RAWVIDEO,
39 CODEC_ID_MSMPEG4V1,
40 CODEC_ID_MSMPEG4V2,
41 CODEC_ID_MSMPEG4V3,
42 CODEC_ID_WMV1,
43 CODEC_ID_WMV2,
44 CODEC_ID_H263P,
45 CODEC_ID_H263I,
46 CODEC_ID_FLV1,
47 CODEC_ID_SVQ1,
48 CODEC_ID_SVQ3,
49 CODEC_ID_DVVIDEO,
50 CODEC_ID_DVAUDIO,
51 CODEC_ID_WMAV1,
52 CODEC_ID_WMAV2,
53 CODEC_ID_MACE3,
54 CODEC_ID_MACE6,
55 CODEC_ID_HUFFYUV,
56 CODEC_ID_CYUV,
57 CODEC_ID_H264,
58 CODEC_ID_INDEO3,
59 CODEC_ID_VP3,
60 CODEC_ID_AAC,
61 CODEC_ID_MPEG4AAC,
62 CODEC_ID_ASV1,
63 CODEC_ID_ASV2,
64 CODEC_ID_FFV1,
65 CODEC_ID_4XM,
66 CODEC_ID_VCR1,
67 CODEC_ID_CLJR,
68 CODEC_ID_MDEC,
69 CODEC_ID_ROQ,
70 CODEC_ID_INTERPLAY_VIDEO,
71 CODEC_ID_XAN_WC3,
72 CODEC_ID_XAN_WC4,
73
74 /* various pcm "codecs" */
75 CODEC_ID_PCM_S16LE,
76 CODEC_ID_PCM_S16BE,
77 CODEC_ID_PCM_U16LE,
78 CODEC_ID_PCM_U16BE,
79 CODEC_ID_PCM_S8,
80 CODEC_ID_PCM_U8,
81 CODEC_ID_PCM_MULAW,
82 CODEC_ID_PCM_ALAW,
83
84 /* various adpcm codecs */
85 CODEC_ID_ADPCM_IMA_QT,
86 CODEC_ID_ADPCM_IMA_WAV,
87 CODEC_ID_ADPCM_IMA_DK3,
88 CODEC_ID_ADPCM_IMA_DK4,
89 CODEC_ID_ADPCM_MS,
90 CODEC_ID_ADPCM_4XM,
91
92 /* AMR */
93 CODEC_ID_AMR_NB,
94 /* RealAudio codecs*/
95 CODEC_ID_RA_144,
96 CODEC_ID_RA_288,
97
98 /* various DPCM codecs */
99 CODEC_ID_ROQ_DPCM,
100 CODEC_ID_INTERPLAY_DPCM,
101 CODEC_ID_XAN_DPCM,
102 };
103
104 /* CODEC_ID_MP3LAME is absolete */
105 #define CODEC_ID_MP3LAME CODEC_ID_MP3
106
107 enum CodecType {
108 CODEC_TYPE_UNKNOWN = -1,
109 CODEC_TYPE_VIDEO,
110 CODEC_TYPE_AUDIO,
111 };
112
113 /**
114 * Pixel format.
115 */
116 enum PixelFormat {
117 PIX_FMT_YUV420P, ///< Planar YUV 4:2:0 (1 Cr & Cb sample per 2x2 Y samples)
118 PIX_FMT_YUV422,
119 PIX_FMT_RGB24, ///< Packed pixel, 3 bytes per pixel, RGBRGB...
120 PIX_FMT_BGR24, ///< Packed pixel, 3 bytes per pixel, BGRBGR...
121 PIX_FMT_YUV422P, ///< Planar YUV 4:2:2 (1 Cr & Cb sample per 2x1 Y samples)
122 PIX_FMT_YUV444P, ///< Planar YUV 4:4:4 (1 Cr & Cb sample per 1x1 Y samples)
123 PIX_FMT_RGBA32, ///< Packed pixel, 4 bytes per pixel, BGRABGRA...
124 PIX_FMT_YUV410P, ///< Planar YUV 4:1:0 (1 Cr & Cb sample per 4x4 Y samples)
125 PIX_FMT_YUV411P, ///< Planar YUV 4:1:1 (1 Cr & Cb sample per 4x1 Y samples)
126 PIX_FMT_RGB565, ///< always stored in cpu endianness
127 PIX_FMT_RGB555, ///< always stored in cpu endianness, most significant bit to 1
128 PIX_FMT_GRAY8,
129 PIX_FMT_MONOWHITE, ///< 0 is white
130 PIX_FMT_MONOBLACK, ///< 0 is black
131 PIX_FMT_PAL8, ///< 8 bit with RGBA palette
132 PIX_FMT_YUVJ420P, ///< Planar YUV 4:2:0 full scale (jpeg)
133 PIX_FMT_YUVJ422P, ///< Planar YUV 4:2:2 full scale (jpeg)
134 PIX_FMT_YUVJ444P, ///< Planar YUV 4:4:4 full scale (jpeg)
135 PIX_FMT_XVMC_MPEG2_MC,///< XVideo Motion Acceleration via common packet passing(xvmc_render.h)
136 PIX_FMT_XVMC_MPEG2_IDCT,
137 PIX_FMT_NB,
138 };
139
140 /* currently unused, may be used if 24/32 bits samples ever supported */
141 enum SampleFormat {
142 SAMPLE_FMT_S16 = 0, ///< signed 16 bits
143 };
144
145 /* in bytes */
146 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 131072
147
148 /**
149 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
150 * this is mainly needed because some optimized bitstream readers read
151 * 32 or 64 bit at once and could read over the end<br>
152 * Note, if the first 23 bits of the additional bytes are not 0 then damaged
153 * MPEG bitstreams could cause overread and segfault
154 */
155 #define FF_INPUT_BUFFER_PADDING_SIZE 8
156
157 /* motion estimation type, EPZS by default */
158 enum Motion_Est_ID {
159 ME_ZERO = 1,
160 ME_FULL,
161 ME_LOG,
162 ME_PHODS,
163 ME_EPZS,
164 ME_X1
165 };
166
167 typedef struct RcOverride{
168 int start_frame;
169 int end_frame;
170 int qscale; // if this is 0 then quality_factor will be used instead
171 float quality_factor;
172 } RcOverride;
173
174 /* only for ME compatiblity with old apps */
175 extern int motion_estimation_method;
176
177 /* ME algos sorted by quality */
178 static const int Motion_Est_QTab[] = { ME_ZERO, ME_PHODS, ME_LOG,
179 ME_X1, ME_EPZS, ME_FULL };
180
181
182 #define FF_MAX_B_FRAMES 8
183
184 /* encoding support
185 these flags can be passed in AVCodecContext.flags before initing
186 Note: note not everything is supported yet
187 */
188
189 #define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
190 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed
191 #define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
192 #define CODEC_FLAG_GMC 0x0020 ///< use GMC
193 #define CODEC_FLAG_PART 0x0080 ///< use data partitioning
194 /* parent program gurantees that the input for b-frame containing streams is not written to
195 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
196 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
197 #define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
198 #define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
199 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
200 #define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
201 #define CODEC_FLAG_EMU_EDGE 0x4000///< dont draw edges
202 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
203 #define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
204 of only at frame boundaries */
205 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
206 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
207 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay
208 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
209 #define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
210 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
211 #define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
212 /* Fx : Flag for h263+ extra options */
213 #define CODEC_FLAG_H263P_AIC 0x01000000 ///< Advanced intra coding
214 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
215 /* For advanced prediction mode, we reuse the 4MV flag */
216 /* Unsupported options :
217 * Syntax Arithmetic coding (SAC)
218 * Deblocking filter internal loop
219 * Slice structured
220 * Reference Picture Selection
221 * Independant Segment Decoding
222 * Alternative Inter * VLC
223 * Modified Quantization */
224 /* /Fx */
225 /* codec capabilities */
226
227 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
228 /**
229 * Codec uses get_buffer() for allocating buffers.
230 * direct rendering method 1
231 */
232 #define CODEC_CAP_DR1 0x0002
233 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
234 used */
235 #define CODEC_CAP_PARSE_ONLY 0x0004
236 #define CODEC_CAP_TRUNCATED 0x0008
237
238 #define FF_COMMON_FRAME \
239 /**\
240 * pointer to the picture planes.\
241 * this might be different from the first allocated byte\
242 * - encoding: \
243 * - decoding: \
244 */\
245 uint8_t *data[4];\
246 int linesize[4];\
247 /**\
248 * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
249 * this isnt used by lavc unless the default get/release_buffer() is used\
250 * - encoding: \
251 * - decoding: \
252 */\
253 uint8_t *base[4];\
254 /**\
255 * 1 -> keyframe, 0-> not\
256 * - encoding: set by lavc\
257 * - decoding: set by lavc\
258 */\
259 int key_frame;\
260 \
261 /**\
262 * picture type of the frame, see ?_TYPE below.\
263 * - encoding: set by lavc for coded_picture (and set by user for input)\
264 * - decoding: set by lavc\
265 */\
266 int pict_type;\
267 \
268 /**\
269 * presentation timestamp in micro seconds (time when frame should be shown to user)\
270 * if 0 then the frame_rate will be used as reference\
271 * - encoding: MUST be set by user\
272 * - decoding: set by lavc\
273 */\
274 int64_t pts;\
275 \
276 /**\
277 * picture number in bitstream order.\
278 * - encoding: set by\
279 * - decoding: set by lavc\
280 */\
281 int coded_picture_number;\
282 /**\
283 * picture number in display order.\
284 * - encoding: set by\
285 * - decoding: set by lavc\
286 */\
287 int display_picture_number;\
288 \
289 /**\
290 * quality (between 1 (good) and 31 (bad)) \
291 * - encoding: set by lavc for coded_picture (and set by user for input)\
292 * - decoding: set by lavc\
293 */\
294 float quality; \
295 \
296 /**\
297 * buffer age (1->was last buffer and dint change, 2->..., ...).\
298 * set to something large if the buffer has not been used yet \
299 * - encoding: unused\
300 * - decoding: MUST be set by get_buffer()\
301 */\
302 int age;\
303 \
304 /**\
305 * is this picture used as reference\
306 * - encoding: unused\
307 * - decoding: set by lavc (before get_buffer() call))\
308 */\
309 int reference;\
310 \
311 /**\
312 * QP table\
313 * - encoding: unused\
314 * - decoding: set by lavc\
315 */\
316 int8_t *qscale_table;\
317 /**\
318 * QP store stride\
319 * - encoding: unused\
320 * - decoding: set by lavc\
321 */\
322 int qstride;\
323 \
324 /**\
325 * mbskip_table[mb]>=1 if MB didnt change\
326 * stride= mb_width = (width+15)>>4\
327 * - encoding: unused\
328 * - decoding: set by lavc\
329 */\
330 uint8_t *mbskip_table;\
331 \
332 /**\
333 * for some private data of the user\
334 * - encoding: unused\
335 * - decoding: set by user\
336 */\
337 void *opaque;\
338 \
339 /**\
340 * error\
341 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
342 * - decoding: unused\
343 */\
344 uint64_t error[4];\
345 \
346 /**\
347 * type of the buffer (to keep track of who has to dealloc data[*])\
348 * - encoding: set by the one who allocs it\
349 * - decoding: set by the one who allocs it\
350 * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
351 */\
352 int type;\
353 \
354 /**\
355 * when decoding, this signal how much the picture must be delayed.\
356 * extra_delay = repeat_pict / (2*fps)\
357 * - encoding: unused\
358 * - decoding: set by lavc\
359 */\
360 int repeat_pict;\
361 \
362 /**\
363 * \
364 */\
365 int qscale_type;\
366
367 #define FF_QSCALE_TYPE_MPEG1 0
368 #define FF_QSCALE_TYPE_MPEG2 1
369
370 #define FF_BUFFER_TYPE_INTERNAL 1
371 #define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
372 #define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewher else, dont dealloc image (data/base)
373 #define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, dont dealloc anything
374
375
376 #define FF_I_TYPE 1 // Intra
377 #define FF_P_TYPE 2 // Predicted
378 #define FF_B_TYPE 3 // Bi-dir predicted
379 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
380 #define FF_SI_TYPE 5
381 #define FF_SP_TYPE 6
382
383 /**
384 * Audio Video Frame.
385 */
386 typedef struct AVFrame {
387 FF_COMMON_FRAME
388 } AVFrame;
389
390 #define DEFAULT_FRAME_RATE_BASE 1001000
391
392 /**
393 * main external api structure.
394 */
395 typedef struct AVCodecContext {
396 /**
397 * the average bitrate.
398 * - encoding: set by user. unused for constant quantizer encoding
399 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
400 */
401 int bit_rate;
402
403 /**
404 * number of bits the bitstream is allowed to diverge from the reference.
405 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
406 * - encoding: set by user. unused for constant quantizer encoding
407 * - decoding: unused
408 */
409 int bit_rate_tolerance;
410
411 /**
412 * CODEC_FLAG_*.
413 * - encoding: set by user.
414 * - decoding: set by user.
415 */
416 int flags;
417
418 /**
419 * some codecs needs additionnal format info. It is stored here
420 * - encoding: set by user.
421 * - decoding: set by lavc. (FIXME is this ok?)
422 */
423 int sub_id;
424
425 /**
426 * motion estimation algorithm used for video coding.
427 * - encoding: MUST be set by user.
428 * - decoding: unused
429 */
430 int me_method;
431
432 /**
433 * some codecs need / can use extra-data like huffman tables.
434 * mjpeg: huffman tables
435 * rv10: additional flags
436 * mpeg4: global headers (they can be in the bitstream or here)
437 * - encoding: set/allocated/freed by lavc.
438 * - decoding: set/allocated/freed by user.
439 */
440 void *extradata;
441 int extradata_size;
442
443 /* video only */
444 /**
445 * frames per sec multiplied by frame_rate_base.
446 * for variable fps this is the precission, so if the timestamps
447 * can be specified in msec precssion then this is 1000*frame_rate_base
448 * - encoding: MUST be set by user
449 * - decoding: set by lavc. 0 or the frame_rate if available
450 */
451 int frame_rate;
452
453 /**
454 * width / height.
455 * - encoding: MUST be set by user.
456 * - decoding: set by user, some codecs might override / change it during playback
457 */
458 int width, height;
459
460 #define FF_ASPECT_SQUARE 1
461 #define FF_ASPECT_4_3_625 2
462 #define FF_ASPECT_4_3_525 3
463 #define FF_ASPECT_16_9_625 4
464 #define FF_ASPECT_16_9_525 5
465 #define FF_ASPECT_EXTENDED 15
466
467 /**
468 * the number of pictures in a group of pitures, or 0 for intra_only.
469 * - encoding: set by user.
470 * - decoding: unused
471 */
472 int gop_size;
473
474 /**
475 * pixel format, see PIX_FMT_xxx.
476 * - encoding: FIXME: used by ffmpeg to decide whether an pix_fmt
477 * conversion is in order. This only works for
478 * codecs with one supported pix_fmt, we should
479 * do something for a generic case as well.
480 * - decoding: set by lavc.
481 */
482 enum PixelFormat pix_fmt;
483
484 /**
485 * Frame rate emulation. If not zero lower layer (i.e. format handler)
486 * has to read frames at native frame rate.
487 * - encoding: set by user.
488 * - decoding: unused.
489 */
490 int rate_emu;
491
492 /**
493 * if non NULL, 'draw_horiz_band' is called by the libavcodec
494 * decoder to draw an horizontal band. It improve cache usage. Not
495 * all codecs can do that. You must check the codec capabilities
496 * before
497 * - encoding: unused
498 * - decoding: set by user.
499 * @param height the height of the slice
500 * @param y the y position of the slice
501 * @param type 1->top field, 2->bottom field, 3->frame
502 * @param offset offset into the AVFrame.data from which the slice should be read
503 */
504 void (*draw_horiz_band)(struct AVCodecContext *s,
505 AVFrame *src, int offset[4],
506 int y, int type, int height);
507
508 /* audio only */
509 int sample_rate; ///< samples per sec
510 int channels;
511 int sample_fmt; ///< sample format, currenly unused
512
513 /* the following data should not be initialized */
514 int frame_size; ///< in samples, initialized when calling 'init'
515 int frame_number; ///< audio or video frame number
516 int real_pict_num; ///< returns the real picture number of previous encoded frame
517
518 /**
519 * number of frames the decoded output will be delayed relative to
520 * the encoded input.
521 * - encoding: set by lavc.
522 * - decoding: unused
523 */
524 int delay;
525
526 /* - encoding parameters */
527 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
528 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
529
530 /**
531 * minimum quantizer.
532 * - encoding: set by user.
533 * - decoding: unused
534 */
535 int qmin;
536
537 /**
538 * maximum quantizer.
539 * - encoding: set by user.
540 * - decoding: unused
541 */
542 int qmax;
543
544 /**
545 * maximum quantizer difference etween frames.
546 * - encoding: set by user.
547 * - decoding: unused
548 */
549 int max_qdiff;
550
551 /**
552 * maximum number of b frames between non b frames.
553 * note: the output will be delayed by max_b_frames+1 relative to the input
554 * - encoding: set by user.
555 * - decoding: unused
556 */
557 int max_b_frames;
558
559 /**
560 * qscale factor between ip and b frames.
561 * - encoding: set by user.
562 * - decoding: unused
563 */
564 float b_quant_factor;
565
566 /** obsolete FIXME remove */
567 int rc_strategy;
568 int b_frame_strategy;
569
570 /**
571 * hurry up amount.
572 * - encoding: unused
573 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
574 */
575 int hurry_up;
576
577 struct AVCodec *codec;
578
579 void *priv_data;
580
581 /* The following data is for RTP friendly coding */
582 /* By now only H.263/H.263+/MPEG4 coder honours this */
583 int rtp_mode; /* 1 for activate RTP friendly-mode */
584 /* highers numbers represent more error-prone */
585 /* enviroments, by now just "1" exist */
586
587 int rtp_payload_size; /* The size of the RTP payload, the coder will */
588 /* do it's best to deliver a chunk with size */
589 /* below rtp_payload_size, the chunk will start */
590 /* with a start code on some codecs like H.263 */
591 /* This doesn't take account of any particular */
592 /* headers inside the transmited RTP payload */
593
594
595 /* The RTP callcack: This function is called */
596 /* every time the encoder as a packet to send */
597 /* Depends on the encoder if the data starts */
598 /* with a Start Code (it should) H.263 does */
599 void (*rtp_callback)(void *data, int size, int packet_number);
600
601 /* statistics, used for 2-pass encoding */
602 int mv_bits;
603 int header_bits;
604 int i_tex_bits;
605 int p_tex_bits;
606 int i_count;
607 int p_count;
608 int skip_count;
609 int misc_bits;
610
611 /**
612 * number of bits used for the previously encoded frame.
613 * - encoding: set by lavc
614 * - decoding: unused
615 */
616 int frame_bits;
617
618 /**
619 * private data of the user, can be used to carry app specific stuff.
620 * - encoding: set by user
621 * - decoding: set by user
622 */
623 void *opaque;
624
625 char codec_name[32];
626 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
627 enum CodecID codec_id; /* see CODEC_ID_xxx */
628
629 /**
630 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
631 * this is used to workaround some encoder bugs
632 * - encoding: set by user, if not then the default based on codec_id will be used
633 * - decoding: set by user, will be converted to upper case by lavc during init
634 */
635 unsigned int codec_tag;
636
637 /**
638 * workaround bugs in encoders which sometimes cannot be detected automatically.
639 * - encoding: unused
640 * - decoding: set by user
641 */
642 int workaround_bugs;
643 #define FF_BUG_AUTODETECT 1 ///< autodetection
644 #define FF_BUG_OLD_MSMPEG4 2
645 #define FF_BUG_XVID_ILACE 4
646 #define FF_BUG_UMP4 8
647 #define FF_BUG_NO_PADDING 16
648 #define FF_BUG_AC_VLC 32
649 #define FF_BUG_QPEL_CHROMA 64
650 #define FF_BUG_STD_QPEL 128
651 #define FF_BUG_QPEL_CHROMA2 256
652 #define FF_BUG_DIRECT_BLOCKSIZE 512
653 #define FF_BUG_EDGE 1024
654 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
655
656 /**
657 * luma single coeff elimination threshold.
658 * - encoding: set by user
659 * - decoding: unused
660 */
661 int luma_elim_threshold;
662
663 /**
664 * chroma single coeff elimination threshold.
665 * - encoding: set by user
666 * - decoding: unused
667 */
668 int chroma_elim_threshold;
669
670 /**
671 * strictly follow the std (MPEG4, ...).
672 * - encoding: set by user
673 * - decoding: unused
674 */
675 int strict_std_compliance;
676
677 /**
678 * qscale offset between ip and b frames.
679 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
680 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
681 * - encoding: set by user.
682 * - decoding: unused
683 */
684 float b_quant_offset;
685
686 /**
687 * error resilience higher values will detect more errors but may missdetect
688 * some more or less valid parts as errors.
689 * - encoding: unused
690 * - decoding: set by user
691 */
692 int error_resilience;
693 #define FF_ER_CAREFULL 1
694 #define FF_ER_COMPLIANT 2
695 #define FF_ER_AGGRESSIVE 3
696 #define FF_ER_VERY_AGGRESSIVE 4
697
698 /**
699 * called at the beginning of each frame to get a buffer for it.
700 * if pic.reference is set then the frame will be read later by lavc
701 * width and height should be rounded up to the next multiple of 16
702 * - encoding: unused
703 * - decoding: set by lavc, user can override
704 */
705 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
706
707 /**
708 * called to release buffers which where allocated with get_buffer.
709 * a released buffer can be reused in get_buffer()
710 * pic.data[*] must be set to NULL
711 * - encoding: unused
712 * - decoding: set by lavc, user can override
713 */
714 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
715
716 /**
717 * is 1 if the decoded stream contains b frames, 0 otherwise.
718 * - encoding: unused
719 * - decoding: set by lavc
720 */
721 int has_b_frames;
722
723 int block_align; ///< used by some WAV based audio codecs
724
725 int parse_only; /* - decoding only: if true, only parsing is done
726 (function avcodec_parse_frame()). The frame
727 data is returned. Only MPEG codecs support this now. */
728
729 /**
730 * 0-> h263 quant 1-> mpeg quant.
731 * - encoding: set by user.
732 * - decoding: unused
733 */
734 int mpeg_quant;
735
736 /**
737 * pass1 encoding statistics output buffer.
738 * - encoding: set by lavc
739 * - decoding: unused
740 */
741 char *stats_out;
742
743 /**
744 * pass2 encoding statistics input buffer.
745 * concatenated stuff from stats_out of pass1 should be placed here
746 * - encoding: allocated/set/freed by user
747 * - decoding: unused
748 */
749 char *stats_in;
750
751 /**
752 * ratecontrol qmin qmax limiting method.
753 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
754 * - encoding: set by user.
755 * - decoding: unused
756 */
757 float rc_qsquish;
758
759 float rc_qmod_amp;
760 int rc_qmod_freq;
761
762 /**
763 * ratecontrol override, see RcOverride.
764 * - encoding: allocated/set/freed by user.
765 * - decoding: unused
766 */
767 RcOverride *rc_override;
768 int rc_override_count;
769
770 /**
771 * rate control equation.
772 * - encoding: set by user
773 * - decoding: unused
774 */
775 char *rc_eq;
776
777 /**
778 * maximum bitrate.
779 * - encoding: set by user.
780 * - decoding: unused
781 */
782 int rc_max_rate;
783
784 /**
785 * minimum bitrate.
786 * - encoding: set by user.
787 * - decoding: unused
788 */
789 int rc_min_rate;
790
791 /**
792 * decoder bitstream buffer size.
793 * - encoding: set by user.
794 * - decoding: unused
795 */
796 int rc_buffer_size;
797 float rc_buffer_aggressivity;
798
799 /**
800 * qscale factor between p and i frames.
801 * - encoding: set by user.
802 * - decoding: unused
803 */
804 float i_quant_factor;
805
806 /**
807 * qscale offset between p and i frames.
808 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
809 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
810 * - encoding: set by user.
811 * - decoding: unused
812 */
813 float i_quant_offset;
814
815 /**
816 * initial complexity for pass1 ratecontrol.
817 * - encoding: set by user.
818 * - decoding: unused
819 */
820 float rc_initial_cplx;
821
822 /**
823 * dct algorithm, see FF_DCT_* below.
824 * - encoding: set by user
825 * - decoding: unused
826 */
827 int dct_algo;
828 #define FF_DCT_AUTO 0
829 #define FF_DCT_FASTINT 1
830 #define FF_DCT_INT 2
831 #define FF_DCT_MMX 3
832 #define FF_DCT_MLIB 4
833 #define FF_DCT_ALTIVEC 5
834
835 /**
836 * luminance masking (0-> disabled).
837 * - encoding: set by user
838 * - decoding: unused
839 */
840 float lumi_masking;
841
842 /**
843 * temporary complexity masking (0-> disabled).
844 * - encoding: set by user
845 * - decoding: unused
846 */
847 float temporal_cplx_masking;
848
849 /**
850 * spatial complexity masking (0-> disabled).
851 * - encoding: set by user
852 * - decoding: unused
853 */
854 float spatial_cplx_masking;
855
856 /**
857 * p block masking (0-> disabled).
858 * - encoding: set by user
859 * - decoding: unused
860 */
861 float p_masking;
862
863 /**
864 * darkness masking (0-> disabled).
865 * - encoding: set by user
866 * - decoding: unused
867 */
868 float dark_masking;
869
870
871 /* for binary compatibility */
872 int unused;
873
874 /**
875 * idct algorithm, see FF_IDCT_* below.
876 * - encoding: set by user
877 * - decoding: set by user
878 */
879 int idct_algo;
880 #define FF_IDCT_AUTO 0
881 #define FF_IDCT_INT 1
882 #define FF_IDCT_SIMPLE 2
883 #define FF_IDCT_SIMPLEMMX 3
884 #define FF_IDCT_LIBMPEG2MMX 4
885 #define FF_IDCT_PS2 5
886 #define FF_IDCT_MLIB 6
887 #define FF_IDCT_ARM 7
888 #define FF_IDCT_ALTIVEC 8
889 #define FF_IDCT_SH4 9
890 #define FF_IDCT_SIMPLEARM 10
891
892 /**
893 * slice count.
894 * - encoding: set by lavc
895 * - decoding: set by user (or 0)
896 */
897 int slice_count;
898 /**
899 * slice offsets in the frame in bytes.
900 * - encoding: set/allocated by lavc
901 * - decoding: set/allocated by user (or NULL)
902 */
903 int *slice_offset;
904
905 /**
906 * error concealment flags.
907 * - encoding: unused
908 * - decoding: set by user
909 */
910 int error_concealment;
911 #define FF_EC_GUESS_MVS 1
912 #define FF_EC_DEBLOCK 2
913
914 /**
915 * dsp_mask could be add used to disable unwanted CPU features
916 * CPU features (i.e. MMX, SSE. ...)
917 *
918 * with FORCE flag you may instead enable given CPU features
919 * (Dangerous: usable in case of misdetection, improper usage however will
920 * result into program crash)
921 */
922 unsigned dsp_mask;
923 #define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
924 /* lower 16 bits - CPU features */
925 #ifdef HAVE_MMX
926 #define FF_MM_MMX 0x0001 /* standard MMX */
927 #define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
928 #define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
929 #define FF_MM_SSE 0x0008 /* SSE functions */
930 #define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
931 #endif /* HAVE_MMX */
932
933 /**
934 * bits per sample/pixel from the demuxer (needed for huffyuv).
935 * - encoding: set by lavc
936 * - decoding: set by user
937 */
938 int bits_per_sample;
939
940 /**
941 * prediction method (needed for huffyuv).
942 * - encoding: set by user
943 * - decoding: unused
944 */
945 int prediction_method;
946 #define FF_PRED_LEFT 0
947 #define FF_PRED_PLANE 1
948 #define FF_PRED_MEDIAN 2
949
950 /**
951 * aspect ratio (0 if unknown).
952 * - encoding: set by user.
953 * - decoding: set by lavc.
954 */
955 float aspect_ratio;
956
957 /**
958 * the picture in the bitstream.
959 * - encoding: set by lavc
960 * - decoding: set by lavc
961 */
962 AVFrame *coded_frame;
963
964 /**
965 * debug.
966 * - encoding: set by user.
967 * - decoding: set by user.
968 */
969 int debug;
970 #define FF_DEBUG_PICT_INFO 1
971 #define FF_DEBUG_RC 2
972 #define FF_DEBUG_BITSTREAM 4
973 #define FF_DEBUG_MB_TYPE 8
974 #define FF_DEBUG_QP 16
975 #define FF_DEBUG_MV 32
976 #define FF_DEBUG_VIS_MV 0x00000040
977 #define FF_DEBUG_SKIP 0x00000080
978 #define FF_DEBUG_STARTCODE 0x00000100
979 #define FF_DEBUG_PTS 0x00000200
980 #define FF_DEBUG_ER 0x00000400
981 #define FF_DEBUG_MMCO 0x00000800
982 #define FF_DEBUG_BUGS 0x00001000
983
984 /**
985 * error.
986 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
987 * - decoding: unused
988 */
989 uint64_t error[4];
990
991 /**
992 * minimum MB quantizer.
993 * - encoding: set by user.
994 * - decoding: unused
995 */
996 int mb_qmin;
997
998 /**
999 * maximum MB quantizer.
1000 * - encoding: set by user.
1001 * - decoding: unused
1002 */
1003 int mb_qmax;
1004
1005 /**
1006 * motion estimation compare function.
1007 * - encoding: set by user.
1008 * - decoding: unused
1009 */
1010 int me_cmp;
1011 /**
1012 * subpixel motion estimation compare function.
1013 * - encoding: set by user.
1014 * - decoding: unused
1015 */
1016 int me_sub_cmp;
1017 /**
1018 * macroblock compare function (not supported yet).
1019 * - encoding: set by user.
1020 * - decoding: unused
1021 */
1022 int mb_cmp;
1023 #define FF_CMP_SAD 0
1024 #define FF_CMP_SSE 1
1025 #define FF_CMP_SATD 2
1026 #define FF_CMP_DCT 3
1027 #define FF_CMP_PSNR 4
1028 #define FF_CMP_BIT 5
1029 #define FF_CMP_RD 6
1030 #define FF_CMP_ZERO 7
1031 #define FF_CMP_CHROMA 256
1032
1033 /**
1034 * ME diamond size & shape.
1035 * - encoding: set by user.
1036 * - decoding: unused
1037 */
1038 int dia_size;
1039
1040 /**
1041 * amount of previous MV predictors (2a+1 x 2a+1 square).
1042 * - encoding: set by user.
1043 * - decoding: unused
1044 */
1045 int last_predictor_count;
1046
1047 /**
1048 * pre pass for motion estimation.
1049 * - encoding: set by user.
1050 * - decoding: unused
1051 */
1052 int pre_me;
1053
1054 /**
1055 * motion estimation pre pass compare function.
1056 * - encoding: set by user.
1057 * - decoding: unused
1058 */
1059 int me_pre_cmp;
1060
1061 /**
1062 * ME pre pass diamond size & shape.
1063 * - encoding: set by user.
1064 * - decoding: unused
1065 */
1066 int pre_dia_size;
1067
1068 /**
1069 * subpel ME quality.
1070 * - encoding: set by user.
1071 * - decoding: unused
1072 */
1073 int me_subpel_quality;
1074
1075 /**
1076 * callback to negotiate the pixelFormat.
1077 * @param fmt is the list of formats which are supported by the codec,
1078 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1079 * the first is allways the native one
1080 * @return the choosen format
1081 * - encoding: unused
1082 * - decoding: set by user, if not set then the native format will always be choosen
1083 */
1084 enum PixelFormat (*get_format)(struct AVCodecContext *s, enum PixelFormat * fmt);
1085
1086 /**
1087 * DTG active format information (additionnal aspect ratio
1088 * information only used in DVB MPEG2 transport streams). 0 if
1089 * not set.
1090 *
1091 * - encoding: unused.
1092 * - decoding: set by decoder
1093 */
1094 int dtg_active_format;
1095 #define FF_DTG_AFD_SAME 8
1096 #define FF_DTG_AFD_4_3 9
1097 #define FF_DTG_AFD_16_9 10
1098 #define FF_DTG_AFD_14_9 11
1099 #define FF_DTG_AFD_4_3_SP_14_9 13
1100 #define FF_DTG_AFD_16_9_SP_14_9 14
1101 #define FF_DTG_AFD_SP_4_3 15
1102
1103 /**
1104 * Maximum motion estimation search range in subpel units.
1105 * if 0 then no limit
1106 *
1107 * - encoding: set by user.
1108 * - decoding: unused.
1109 */
1110 int me_range;
1111
1112 /**
1113 * frame_rate_base.
1114 * for variable fps this is 1
1115 * - encoding: set by user.
1116 * - decoding: set by lavc.
1117 * @todo move this after frame_rate
1118 */
1119
1120 int frame_rate_base;
1121 /**
1122 * intra quantizer bias.
1123 * - encoding: set by user.
1124 * - decoding: unused
1125 */
1126 int intra_quant_bias;
1127 #define FF_DEFAULT_QUANT_BIAS 999999
1128
1129 /**
1130 * inter quantizer bias.
1131 * - encoding: set by user.
1132 * - decoding: unused
1133 */
1134 int inter_quant_bias;
1135
1136 /**
1137 * color table ID.
1138 * - encoding: unused.
1139 * - decoding: which clrtable should be used for 8bit RGB images
1140 * table have to be stored somewhere FIXME
1141 */
1142 int color_table_id;
1143
1144 /**
1145 * internal_buffer count.
1146 * Dont touch, used by lavc default_get_buffer()
1147 */
1148 int internal_buffer_count;
1149
1150 /**
1151 * internal_buffers.
1152 * Dont touch, used by lavc default_get_buffer()
1153 */
1154 void *internal_buffer;
1155
1156 #define FF_QUALITY_SCALE 256
1157 /**
1158 * global quality for codecs which cannot change it per frame.
1159 * this should be proportional to MPEG1/2/4 qscale.
1160 * - encoding: set by user.
1161 * - decoding: unused
1162 */
1163 int global_quality;
1164
1165 #define FF_CODER_TYPE_VLC 0
1166 #define FF_CODER_TYPE_AC 1
1167 /**
1168 * coder type
1169 * - encoding: set by user.
1170 * - decoding: unused
1171 */
1172 int coder_type;
1173
1174 /**
1175 * context model
1176 * - encoding: set by user.
1177 * - decoding: unused
1178 */
1179 int context_model;
1180
1181 /**
1182 * slice flags
1183 * - encoding: unused
1184 * - decoding: set by user.
1185 */
1186 int slice_flags;
1187 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1188 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1189 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1190
1191 /**
1192 * XVideo Motion Acceleration
1193 * - encoding: forbidden
1194 * - decoding: set by decoder
1195 */
1196 int xvmc_acceleration;
1197
1198 /**
1199 * macroblock decision mode
1200 * - encoding: set by user.
1201 * - decoding: unused
1202 */
1203 int mb_decision;
1204 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1205 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1206 #define FF_MB_DECISION_RD 2 ///< rate distoration
1207
1208 /**
1209 * custom intra quantization matrix
1210 * - encoding: set by user, can be NULL
1211 * - decoding: set by lavc
1212 */
1213 uint16_t *intra_matrix;
1214
1215 /**
1216 * custom inter quantization matrix
1217 * - encoding: set by user, can be NULL
1218 * - decoding: set by lavc
1219 */
1220 uint16_t *inter_matrix;
1221
1222 /**
1223 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1224 * this is used to workaround some encoder bugs
1225 * - encoding: unused
1226 * - decoding: set by user, will be converted to upper case by lavc during init
1227 */
1228 unsigned int stream_codec_tag;
1229 } AVCodecContext;
1230
1231
1232 /**
1233 * AVOption.
1234 */
1235 typedef struct AVOption {
1236 /** options' name */
1237 const char *name; /* if name is NULL, it indicates a link to next */
1238 /** short English text help or const struct AVOption* subpointer */
1239 const char *help; // const struct AVOption* sub;
1240 /** offset to context structure where the parsed value should be stored */
1241 int offset;
1242 /** options' type */
1243 int type;
1244 #define FF_OPT_TYPE_BOOL 1 ///< boolean - true,1,on (or simply presence)
1245 #define FF_OPT_TYPE_DOUBLE 2 ///< double
1246 #define FF_OPT_TYPE_INT 3 ///< integer
1247 #define FF_OPT_TYPE_STRING 4 ///< string (finished with \0)
1248 #define FF_OPT_TYPE_MASK 0x1f ///< mask for types - upper bits are various flags
1249 //#define FF_OPT_TYPE_EXPERT 0x20 // flag for expert option
1250 #define FF_OPT_TYPE_FLAG (FF_OPT_TYPE_BOOL | 0x40)
1251 #define FF_OPT_TYPE_RCOVERRIDE (FF_OPT_TYPE_STRING | 0x80)
1252 /** min value (min == max -> no limits) */
1253 double min;
1254 /** maximum value for double/int */
1255 double max;
1256 /** default boo [0,1]l/double/int value */
1257 double defval;
1258 /**
1259 * default string value (with optional semicolon delimited extra option-list
1260 * i.e. option1;option2;option3
1261 * defval might select other then first argument as default
1262 */
1263 const char *defstr;
1264 #define FF_OPT_MAX_DEPTH 10
1265 } AVOption;
1266
1267 /**
1268 * Parse option(s) and sets fields in passed structure
1269 * @param strct structure where the parsed results will be written
1270 * @param list list with AVOptions
1271 * @param opts string with options for parsing
1272 */
1273 int avoption_parse(void* strct, const AVOption* list, const char* opts);
1274
1275
1276 /**
1277 * AVCodec.
1278 */
1279 typedef struct AVCodec {
1280 const char *name;
1281 enum CodecType type;
1282 int id;
1283 int priv_data_size;
1284 int (*init)(AVCodecContext *);
1285 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
1286 int (*close)(AVCodecContext *);
1287 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
1288 uint8_t *buf, int buf_size);
1289 int capabilities;
1290 const AVOption *options;
1291 struct AVCodec *next;
1292 void (*flush)(AVCodecContext *);
1293 } AVCodec;
1294
1295 /**
1296 * four components are given, that's all.
1297 * the last component is alpha
1298 */
1299 typedef struct AVPicture {
1300 uint8_t *data[4];
1301 int linesize[4]; ///< number of bytes per line
1302 } AVPicture;
1303
1304 extern AVCodec ac3_encoder;
1305 extern AVCodec mp2_encoder;
1306 extern AVCodec mp3lame_encoder;
1307 extern AVCodec oggvorbis_encoder;
1308 extern AVCodec mpeg1video_encoder;
1309 extern AVCodec mpeg2video_encoder;
1310 extern AVCodec h263_encoder;
1311 extern AVCodec h263p_encoder;
1312 extern AVCodec flv_encoder;
1313 extern AVCodec rv10_encoder;
1314 extern AVCodec mjpeg_encoder;
1315 extern AVCodec ljpeg_encoder;
1316 extern AVCodec mpeg4_encoder;
1317 extern AVCodec msmpeg4v1_encoder;
1318 extern AVCodec msmpeg4v2_encoder;
1319 extern AVCodec msmpeg4v3_encoder;
1320 extern AVCodec wmv1_encoder;
1321 extern AVCodec wmv2_encoder;
1322 extern AVCodec huffyuv_encoder;
1323 extern AVCodec h264_encoder;
1324 extern AVCodec asv1_encoder;
1325 extern AVCodec asv2_encoder;
1326 extern AVCodec vcr1_encoder;
1327 extern AVCodec ffv1_encoder;
1328 extern AVCodec mdec_encoder;
1329
1330 extern AVCodec h263_decoder;
1331 extern AVCodec mpeg4_decoder;
1332 extern AVCodec msmpeg4v1_decoder;
1333 extern AVCodec msmpeg4v2_decoder;
1334 extern AVCodec msmpeg4v3_decoder;
1335 extern AVCodec wmv1_decoder;
1336 extern AVCodec wmv2_decoder;
1337 extern AVCodec mpeg1video_decoder;
1338 extern AVCodec mpeg2video_decoder;
1339 extern AVCodec mpeg_xvmc_decoder;
1340 extern AVCodec h263i_decoder;
1341 extern AVCodec flv_decoder;
1342 extern AVCodec rv10_decoder;
1343 extern AVCodec svq1_decoder;
1344 extern AVCodec svq3_decoder;
1345 extern AVCodec dvvideo_decoder;
1346 extern AVCodec dvaudio_decoder;
1347 extern AVCodec wmav1_decoder;
1348 extern AVCodec wmav2_decoder;
1349 extern AVCodec mjpeg_decoder;
1350 extern AVCodec mjpegb_decoder;
1351 extern AVCodec mp2_decoder;
1352 extern AVCodec mp3_decoder;
1353 extern AVCodec mace3_decoder;
1354 extern AVCodec mace6_decoder;
1355 extern AVCodec huffyuv_decoder;
1356 extern AVCodec oggvorbis_decoder;
1357 extern AVCodec cyuv_decoder;
1358 extern AVCodec h264_decoder;
1359 extern AVCodec indeo3_decoder;
1360 extern AVCodec vp3_decoder;
1361 extern AVCodec amr_nb_decoder;
1362 extern AVCodec amr_nb_encoder;
1363 extern AVCodec aac_decoder;
1364 extern AVCodec mpeg4aac_decoder;
1365 extern AVCodec asv1_decoder;
1366 extern AVCodec asv2_decoder;
1367 extern AVCodec vcr1_decoder;
1368 extern AVCodec cljr_decoder;
1369 extern AVCodec ffv1_decoder;
1370 extern AVCodec fourxm_decoder;
1371 extern AVCodec mdec_decoder;
1372 extern AVCodec roq_decoder;
1373 extern AVCodec interplay_video_decoder;
1374 extern AVCodec xan_wc3_decoder;
1375 extern AVCodec ra_144_decoder;
1376 extern AVCodec ra_288_decoder;
1377 extern AVCodec roq_dpcm_decoder;
1378 extern AVCodec interplay_dpcm_decoder;
1379 extern AVCodec xan_dpcm_decoder;
1380
1381 /* pcm codecs */
1382 #define PCM_CODEC(id, name) \
1383 extern AVCodec name ## _decoder; \
1384 extern AVCodec name ## _encoder
1385
1386 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
1387 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
1388 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
1389 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
1390 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
1391 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
1392 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
1393 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
1394
1395 /* adpcm codecs */
1396
1397 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
1398 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
1399 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
1400 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
1401 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
1402 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
1403
1404 #undef PCM_CODEC
1405
1406 /* dummy raw video codec */
1407 extern AVCodec rawvideo_encoder;
1408 extern AVCodec rawvideo_decoder;
1409
1410 /* the following codecs use external GPL libs */
1411 extern AVCodec ac3_decoder;
1412
1413 /* resample.c */
1414
1415 struct ReSampleContext;
1416
1417 typedef struct ReSampleContext ReSampleContext;
1418
1419 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
1420 int output_rate, int input_rate);
1421 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
1422 void audio_resample_close(ReSampleContext *s);
1423
1424 /* YUV420 format is assumed ! */
1425
1426 struct ImgReSampleContext;
1427
1428 typedef struct ImgReSampleContext ImgReSampleContext;
1429
1430 ImgReSampleContext *img_resample_init(int output_width, int output_height,
1431 int input_width, int input_height);
1432
1433 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
1434 int iwidth, int iheight,
1435 int topBand, int bottomBand,
1436 int leftBand, int rightBand);
1437
1438 void img_resample(ImgReSampleContext *s,
1439 AVPicture *output, AVPicture *input);
1440
1441 void img_resample_close(ImgReSampleContext *s);
1442
1443 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
1444 int pix_fmt, int width, int height);
1445 int avpicture_layout(AVPicture* src, int pix_fmt, int width, int height,
1446 unsigned char *dest, int dest_size);
1447 int avpicture_get_size(int pix_fmt, int width, int height);
1448 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
1449 const char *avcodec_get_pix_fmt_name(int pix_fmt);
1450 enum PixelFormat avcodec_get_pix_fmt(const char* name);
1451
1452 #define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
1453 #define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
1454 #define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
1455 #define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
1456 #define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
1457 #define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
1458
1459 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
1460 int has_alpha);
1461 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
1462 int has_alpha, int *loss_ptr);
1463
1464 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
1465 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
1466 int img_get_alpha_info(AVPicture *src, int pix_fmt, int width, int height);
1467
1468 /* convert among pixel formats */
1469 int img_convert(AVPicture *dst, int dst_pix_fmt,
1470 AVPicture *src, int pix_fmt,
1471 int width, int height);
1472
1473 /* deinterlace a picture */
1474 int avpicture_deinterlace(AVPicture *dst, AVPicture *src,
1475 int pix_fmt, int width, int height);
1476
1477 /* external high level API */
1478
1479 extern AVCodec *first_avcodec;
1480
1481 /* returns LIBAVCODEC_VERSION_INT constant */
1482 unsigned avcodec_version(void);
1483 /* returns LIBAVCODEC_BUILD constant */
1484 unsigned avcodec_build(void);
1485 void avcodec_init(void);
1486
1487 void register_avcodec(AVCodec *format);
1488 AVCodec *avcodec_find_encoder(enum CodecID id);
1489 AVCodec *avcodec_find_encoder_by_name(const char *name);
1490 AVCodec *avcodec_find_decoder(enum CodecID id);
1491 AVCodec *avcodec_find_decoder_by_name(const char *name);
1492 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
1493
1494 void avcodec_get_context_defaults(AVCodecContext *s);
1495 AVCodecContext *avcodec_alloc_context(void);
1496 AVFrame *avcodec_alloc_frame(void);
1497
1498 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
1499 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
1500 void avcodec_default_free_buffers(AVCodecContext *s);
1501
1502 /**
1503 * opens / inits the AVCodecContext.
1504 * not thread save!
1505 */
1506 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
1507
1508 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
1509 int *frame_size_ptr,
1510 uint8_t *buf, int buf_size);
1511 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
1512 int *got_picture_ptr,
1513 uint8_t *buf, int buf_size);
1514 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
1515 int *data_size_ptr,
1516 uint8_t *buf, int buf_size);
1517 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
1518 const short *samples);
1519 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
1520 const AVFrame *pict);
1521
1522 int avcodec_close(AVCodecContext *avctx);
1523
1524 void avcodec_register_all(void);
1525
1526 void avcodec_flush_buffers(AVCodecContext *avctx);
1527
1528 /* misc usefull functions */
1529
1530 /**
1531 * returns a single letter to describe the picture type
1532 */
1533 char av_get_pict_type_char(int pict_type);
1534
1535 /**
1536 * reduce a fraction.
1537 * this is usefull for framerate calculations
1538 * @param max the maximum allowed for dst_nom & dst_den
1539 * @return 1 if exact, 0 otherwise
1540 */
1541 int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max);
1542
1543 /**
1544 * rescale a 64bit integer.
1545 * a simple a*b/c isnt possible as it can overflow
1546 */
1547 int64_t av_rescale(int64_t a, int b, int c);
1548
1549
1550 /**
1551 * Interface for 0.5.0 version
1552 *
1553 * do not even think about it's usage for this moment
1554 */
1555
1556 typedef struct {
1557 /// compressed size used from given memory buffer
1558 int size;
1559 /// I/P/B frame type
1560 int frame_type;
1561 } avc_enc_result_t;
1562
1563 /**
1564 * Commands
1565 * order can't be changed - once it was defined
1566 */
1567 typedef enum {
1568 // general commands
1569 AVC_OPEN_BY_NAME = 0xACA000,
1570 AVC_OPEN_BY_CODEC_ID,
1571 AVC_OPEN_BY_FOURCC,
1572 AVC_CLOSE,
1573
1574 AVC_FLUSH,
1575 // pin - struct { uint8_t* src, uint_t src_size }
1576 // pout - struct { AVPicture* img, consumed_bytes,
1577 AVC_DECODE,
1578 // pin - struct { AVPicture* img, uint8_t* dest, uint_t dest_size }
1579 // pout - uint_t used_from_dest_size
1580 AVC_ENCODE,
1581
1582 // query/get video commands
1583 AVC_GET_VERSION = 0xACB000,
1584 AVC_GET_WIDTH,
1585 AVC_GET_HEIGHT,
1586 AVC_GET_DELAY,
1587 AVC_GET_QUANT_TABLE,
1588 // ...
1589
1590 // query/get audio commands
1591 AVC_GET_FRAME_SIZE = 0xABC000,
1592
1593 // maybe define some simple structure which
1594 // might be passed to the user - but they can't
1595 // contain any codec specific parts and these
1596 // calls are usualy necessary only few times
1597
1598 // set video commands
1599 AVC_SET_WIDTH = 0xACD000,
1600 AVC_SET_HEIGHT,
1601
1602 // set video encoding commands
1603 AVC_SET_FRAME_RATE = 0xACD800,
1604 AVC_SET_QUALITY,
1605 AVC_SET_HURRY_UP,
1606
1607 // set audio commands
1608 AVC_SET_SAMPLE_RATE = 0xACE000,
1609 AVC_SET_CHANNELS,
1610
1611 } avc_cmd_t;
1612
1613 /**
1614 * \param handle allocated private structure by libavcodec
1615 * for initialization pass NULL - will be returned pout
1616 * user is supposed to know nothing about its structure
1617 * \param cmd type of operation to be performed
1618 * \param pint input parameter
1619 * \param pout output parameter
1620 *
1621 * \returns command status - eventually for query command it might return
1622 * integer resulting value
1623 */
1624 int avcodec(void* handle, avc_cmd_t cmd, void* pin, void* pout);
1625
1626 /* memory */
1627 void *av_malloc(unsigned int size);
1628 void *av_mallocz(unsigned int size);
1629 void *av_realloc(void *ptr, unsigned int size);
1630 void av_free(void *ptr);
1631 char *av_strdup(const char *s);
1632 void __av_freep(void **ptr);
1633 #define av_freep(p) __av_freep((void **)(p))
1634 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
1635 /* for static data only */
1636 /* call av_free_static to release all staticaly allocated tables */
1637 void av_free_static(void);
1638 void *__av_mallocz_static(void** location, unsigned int size);
1639 #define av_mallocz_static(p, s) __av_mallocz_static((void **)(p), s)
1640
1641 #ifdef __cplusplus
1642 }
1643 #endif
1644
1645 #endif /* AVCODEC_H */