3e7bb468d3e0666389c8b4ad78c4561cd6005d9f
[libav.git] / libavcodec / avcodec.h
1 #ifndef AVCODEC_H
2 #define AVCODEC_H
3
4 #include "common.h"
5
6 #define LIBAVCODEC_VERSION_INT 0x000406
7 #define LIBAVCODEC_VERSION "0.4.6"
8 #define LIBAVCODEC_BUILD 4638
9 #define LIBAVCODEC_BUILD_STR "4638"
10
11 enum CodecID {
12 CODEC_ID_NONE,
13 CODEC_ID_MPEG1VIDEO,
14 CODEC_ID_H263,
15 CODEC_ID_RV10,
16 CODEC_ID_MP2,
17 CODEC_ID_MP3LAME,
18 CODEC_ID_VORBIS,
19 CODEC_ID_AC3,
20 CODEC_ID_MJPEG,
21 CODEC_ID_MPEG4,
22 CODEC_ID_RAWVIDEO,
23 CODEC_ID_MSMPEG4V1,
24 CODEC_ID_MSMPEG4V2,
25 CODEC_ID_MSMPEG4V3,
26 CODEC_ID_WMV1,
27 CODEC_ID_WMV2,
28 CODEC_ID_H263P,
29 CODEC_ID_H263I,
30 CODEC_ID_SVQ1,
31 CODEC_ID_DVVIDEO,
32 CODEC_ID_DVAUDIO,
33 CODEC_ID_WMAV1,
34 CODEC_ID_WMAV2,
35 CODEC_ID_MACE3,
36 CODEC_ID_MACE6,
37
38 /* various pcm "codecs" */
39 CODEC_ID_PCM_S16LE,
40 CODEC_ID_PCM_S16BE,
41 CODEC_ID_PCM_U16LE,
42 CODEC_ID_PCM_U16BE,
43 CODEC_ID_PCM_S8,
44 CODEC_ID_PCM_U8,
45 CODEC_ID_PCM_MULAW,
46 CODEC_ID_PCM_ALAW,
47
48 /* various adpcm codecs */
49 CODEC_ID_ADPCM_IMA_QT,
50 CODEC_ID_ADPCM_IMA_WAV,
51 CODEC_ID_ADPCM_MS,
52 };
53
54 enum CodecType {
55 CODEC_TYPE_UNKNOWN = -1,
56 CODEC_TYPE_VIDEO,
57 CODEC_TYPE_AUDIO,
58 };
59
60 enum PixelFormat {
61 PIX_FMT_ANY = -1,
62 PIX_FMT_YUV420P,
63 PIX_FMT_YUV422,
64 PIX_FMT_RGB24,
65 PIX_FMT_BGR24,
66 PIX_FMT_YUV422P,
67 PIX_FMT_YUV444P,
68 PIX_FMT_RGBA32,
69 PIX_FMT_BGRA32,
70 PIX_FMT_YUV410P,
71 PIX_FMT_YUV411P
72 };
73
74 /* currently unused, may be used if 24/32 bits samples ever supported */
75 enum SampleFormat {
76 SAMPLE_FMT_S16 = 0, /* signed 16 bits */
77 };
78
79 /* in bytes */
80 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 131072
81
82 /**
83 * Required number of zero bytes at the end of the input bitstream for decoding.
84 * to avoid overreading (and possibly segfaulting)
85 */
86 #define FF_INPUT_BUFFER_PADDING_SIZE 8
87
88 /* motion estimation type, EPZS by default */
89 enum Motion_Est_ID {
90 ME_ZERO = 1,
91 ME_FULL,
92 ME_LOG,
93 ME_PHODS,
94 ME_EPZS,
95 ME_X1
96 };
97
98 typedef struct RcOverride{
99 int start_frame;
100 int end_frame;
101 int qscale; // if this is 0 then quality_factor will be used instead
102 float quality_factor;
103 } RcOverride;
104
105 /* only for ME compatiblity with old apps */
106 extern int motion_estimation_method;
107
108 /* ME algos sorted by quality */
109 static const int Motion_Est_QTab[] = { ME_ZERO, ME_PHODS, ME_LOG,
110 ME_X1, ME_EPZS, ME_FULL };
111
112
113 #define FF_MAX_B_FRAMES 4
114
115 /* encoding support
116 these flags can be passed in AVCodecContext.flags before initing
117 Note: note not everything is supported yet
118 */
119
120 #define CODEC_FLAG_HQ 0x0001 /* brute force MB-type decission mode (slow) */
121 #define CODEC_FLAG_QSCALE 0x0002 /* use fixed qscale */
122 #define CODEC_FLAG_4MV 0x0004 /* 4 MV per MB allowed */
123 #define CODEC_FLAG_QPEL 0x0010 /* use qpel MC */
124 #define CODEC_FLAG_GMC 0x0020 /* use GMC */
125 #define CODEC_FLAG_PART 0x0080 /* use data partitioning */
126 /* parent program gurantees that the input for b-frame containing streams is not written to
127 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
128 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
129 #define CODEC_FLAG_PASS1 0x0200 /* use internal 2pass ratecontrol in first pass mode */
130 #define CODEC_FLAG_PASS2 0x0400 /* use internal 2pass ratecontrol in second pass mode */
131 #define CODEC_FLAG_EXTERN_HUFF 0x1000 /* use external huffman table (for mjpeg) */
132 #define CODEC_FLAG_GRAY 0x2000 /* only decode/encode grayscale */
133 #define CODEC_FLAG_EMU_EDGE 0x4000/* dont draw edges */
134 #define CODEC_FLAG_DR1 0x8000 /* direct renderig type 1 (store internal frames in external buffers) */
135 #define CODEC_FLAG_TRUNCATED 0x00010000 /* input bitstream might be truncated at a random location instead
136 of only at frame boundaries */
137 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 /* normalize adaptive quantization */
138 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 /* use interlaced dct */
139 #define CODEC_FLAG_LOW_DELAY 0x00080000 /* force low delay / will fail on b frames */
140
141 /* codec capabilities */
142
143 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 /* decoder can use draw_horiz_band callback */
144 #define CODEC_CAP_DR1 0x0002 /* direct rendering method 1 */
145 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
146 used */
147 #define CODEC_CAP_PARSE_ONLY 0x0004
148 #define CODEC_CAP_TRUNCATED 0x0008
149
150 #define FRAME_RATE_BASE 10000
151
152 typedef struct AVCodecContext {
153 /**
154 * the average bitrate
155 * encoding: set by user. unused for constant quantizer encoding
156 * decoding: set by lavc. 0 or some bitrate if this info is available in the stream
157 */
158 int bit_rate;
159
160 /**
161 * number of bits the bitstream is allowed to diverge from the reference
162 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
163 * encoding: set by user. unused for constant quantizer encoding
164 * decoding: unused
165 */
166 int bit_rate_tolerance;
167
168 /**
169 * CODEC_FLAG_*
170 * encoding: set by user.
171 * decoding: set by user.
172 */
173 int flags;
174
175 /**
176 * some codecs needs additionnal format info. It is stored here
177 * encoding: set by user.
178 * decoding: set by lavc. (FIXME is this ok?)
179 */
180 int sub_id;
181
182 /**
183 * motion estimation algorithm used for video coding
184 * encoding: set by user.
185 * decoding: unused
186 */
187 int me_method;
188
189 /**
190 * some codecs need / can use extra-data like huffman tables
191 * mjpeg: huffman tables
192 * rv10: additional flags
193 * mpeg4: global headers (they can be in the bitstream or here)
194 * encoding: set/allocated/freed by lavc.
195 * decoding: set/allocated/freed by user.
196 */
197 void *extradata;
198 int extradata_size;
199
200 /* video only */
201 /**
202 * frames per sec multiplied by FRAME_RATE_BASE
203 * for variable fps this is the precission, so if the timestamps
204 * can be specified in msec precssion then this is 1000*FRAME_RATE_BASE
205 * encoding: set by user
206 * decoding: set by lavc. 0 or the frame_rate if available
207 */
208 int frame_rate;
209
210 /**
211 * encoding: set by user.
212 * decoding: set by user, some codecs might override / change it during playback
213 */
214 int width, height;
215
216 /**
217 * encoding: set by user. 0 if not known
218 * decoding: set by lavc. 0 if not known
219 */
220 int aspect_ratio_info;
221 #define FF_ASPECT_SQUARE 1
222 #define FF_ASPECT_4_3_625 2
223 #define FF_ASPECT_4_3_525 3
224 #define FF_ASPECT_16_9_625 4
225 #define FF_ASPECT_16_9_525 5
226 #define FF_ASPECT_EXTENDED 15
227
228 /**
229 * the number of pictures in a group of pitures, or 0 for intra_only
230 * encoding: set by user.
231 * decoding: unused
232 */
233 int gop_size;
234
235 /**
236 * pixel format, see PIX_FMT_xxx
237 * encoding: unused
238 * decoding: set by lavc.
239 */
240 enum PixelFormat pix_fmt;
241
242 int repeat_pict; /* when decoding, this signal how much the picture */
243 /* must be delayed. */
244 /* extra_delay = (repeat_pict / 2) * (1/fps) */
245
246 /**
247 * if non NULL, 'draw_horiz_band' is called by the libavcodec
248 * decoder to draw an horizontal band. It improve cache usage. Not
249 * all codecs can do that. You must check the codec capabilities
250 * before
251 * encoding: unused
252 * decoding: set by user.
253 */
254 void (*draw_horiz_band)(struct AVCodecContext *s,
255 UINT8 **src_ptr, int linesize,
256 int y, int width, int height);
257
258 /* audio only */
259 int sample_rate; /* samples per sec */
260 int channels;
261 int sample_fmt; /* sample format, currenly unused */
262
263 /* the following data should not be initialized */
264 int frame_size; /* in samples, initialized when calling 'init' */
265 int frame_number; /* audio or video frame number */
266 int real_pict_num; /* returns the real picture number of
267 previous encoded frame */
268
269 /**
270 * 1 -> keyframe, 0-> not
271 * encoding: set by lavc (for the outputed bitstream, not the input frame)
272 * decoding: set by lavc (for the decoded bitstream, not the displayed frame)
273 */
274 int key_frame;
275
276 /**
277 * picture type of the previous en/decoded frame, see ?_TYPE below
278 * encoding: set by lavc (for the outputed bitstream, not the input frame)
279 * decoding: set by lavc (for the decoded bitstream, not the displayed frame)
280 */
281 int pict_type;
282 /* FIXME: these should have FF_ */
283 #define I_TYPE 1 // Intra
284 #define P_TYPE 2 // Predicted
285 #define B_TYPE 3 // Bi-dir predicted
286 #define S_TYPE 4 // S(GMC)-VOP MPEG4
287
288 /**
289 * number of frames the decoded output will be delayed relative to
290 * the encoded input
291 * encoding: set by lavc.
292 * decoding: unused
293 */
294 int delay;
295
296 /**
297 * mbskip_table[mb]=1 if MB didnt change, is only valid for I/P frames
298 * stride= mb_width = (width+15)>>4 (FIXME export stride?)
299 * encoding: unused
300 * decoding: set by lavc
301 */
302 uint8_t *mbskip_table;
303
304 /* encoding parameters */
305 /**
306 * quality (between 1 (good) and 31 (bad))
307 * encoding: set by user if CODEC_FLAG_QSCALE is set otherwise set by lavc
308 * decoding: set by lavc
309 */
310 int quality; /* quality of the previous encoded frame
311
312 this is allso used to set the quality in vbr mode
313 and the per frame quality in CODEC_FLAG_TYPE (second pass mode) */
314 float qcompress; /* amount of qscale change between easy & hard scenes (0.0-1.0)*/
315 float qblur; /* amount of qscale smoothing over time (0.0-1.0) */
316
317 /**
318 * minimum quantizer
319 * encoding: set by user.
320 * decoding: unused
321 */
322 int qmin;
323
324 /**
325 * maximum quantizer
326 * encoding: set by user.
327 * decoding: unused
328 */
329 int qmax;
330
331 /**
332 * maximum quantizer difference etween frames
333 * encoding: set by user.
334 * decoding: unused
335 */
336 int max_qdiff;
337
338 /**
339 * maximum number of b frames between non b frames
340 * note: the output will be delayed by max_b_frames+1 relative to the input
341 * encoding: set by user.
342 * decoding: unused
343 */
344 int max_b_frames;
345
346 /**
347 * qscale factor between ip and b frames
348 * encoding: set by user.
349 * decoding: unused
350 */
351 float b_quant_factor;
352
353 /** obsolete FIXME remove */
354 int rc_strategy;
355 int b_frame_strategy;
356
357 /**
358 * encoding: unused
359 * decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
360 */
361 int hurry_up;
362
363 struct AVCodec *codec;
364
365 void *priv_data;
366
367 /* The following data is for RTP friendly coding */
368 /* By now only H.263/H.263+/MPEG4 coder honours this */
369 int rtp_mode; /* 1 for activate RTP friendly-mode */
370 /* highers numbers represent more error-prone */
371 /* enviroments, by now just "1" exist */
372
373 int rtp_payload_size; /* The size of the RTP payload, the coder will */
374 /* do it's best to deliver a chunk with size */
375 /* below rtp_payload_size, the chunk will start */
376 /* with a start code on some codecs like H.263 */
377 /* This doesn't take account of any particular */
378 /* headers inside the transmited RTP payload */
379
380
381 /* The RTP callcack: This function is called */
382 /* every time the encoder as a packet to send */
383 /* Depends on the encoder if the data starts */
384 /* with a Start Code (it should) H.263 does */
385 void (*rtp_callback)(void *data, int size, int packet_number);
386
387 /**
388 * if you set get_psnr to 1 then after encoding you will have the
389 * PSNR on psnr_y/cb/cr
390 * encoding: set by user (1-> on, 0-> off)
391 * decoding: unused
392 */
393 int get_psnr;
394 float psnr_y;
395 float psnr_cb;
396 float psnr_cr;
397
398 /* statistics, used for 2-pass encoding */
399 int mv_bits;
400 int header_bits;
401 int i_tex_bits;
402 int p_tex_bits;
403 int i_count;
404 int p_count;
405 int skip_count;
406 int misc_bits;
407
408 /**
409 * number of bits used for the previously encoded frame
410 * encoding: set by lavc
411 * decoding: - for audio - bits_per_sample
412 */
413 int frame_bits;
414
415 /**
416 * private data of the user, can be used to carry app specific stuff
417 * encoding: set by user
418 * decoding: set by user
419 */
420 void *opaque;
421
422 char codec_name[32];
423 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
424 enum CodecID codec_id; /* see CODEC_ID_xxx */
425 unsigned int codec_tag; /* codec tag, only used if unknown codec */
426
427 /**
428 * workaround bugs in encoders which sometimes cannot be detected automatically
429 * encoding: unused
430 * decoding: set by user
431 */
432 int workaround_bugs;
433 #define FF_BUG_AUTODETECT 1 //autodetection
434 #define FF_BUG_OLD_MSMPEG4 2
435 #define FF_BUG_XVID_ILACE 4
436 #define FF_BUG_UMP4 8
437 #define FF_BUG_NO_PADDING 16
438 #define FF_BUG_AC_VLC 32
439 #define FF_BUG_QPEL_CHROMA 64
440 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
441
442 /**
443 * encoding: set by user
444 * decoding: unused
445 */
446 int luma_elim_threshold;
447
448 /**
449 * encoding: set by user
450 * decoding: unused
451 */
452 int chroma_elim_threshold;
453
454 /**
455 * strictly follow the std (MPEG4, ...)
456 * encoding: set by user
457 * decoding: unused
458 */
459 int strict_std_compliance;
460
461 /**
462 * qscale offset between ip and b frames
463 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
464 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
465 * encoding: set by user.
466 * decoding: unused
467 */
468 float b_quant_offset;
469
470 /**
471 * error resilience {-1,0,1} higher values will detect more errors but may missdetect
472 * some more or less valid parts as errors
473 * encoding: unused
474 * decoding: set by user
475 */
476 int error_resilience;
477
478 /**
479 * obsolete, just here to keep ABI compatible (should be removed perhaps, dunno)
480 */
481 int *quant_store;
482
483 /**
484 * QP store stride
485 * encoding: unused
486 * decoding: set by lavc
487 */
488 int qstride;
489
490 /**
491 * buffer, where the next picture should be decoded into
492 * encoding: unused
493 * decoding: set by user in get_buffer_callback to a buffer into which the next part
494 * of the bitstream will be decoded, and set by lavc at end of frame to the
495 * next frame which needs to be displayed
496 */
497 uint8_t *dr_buffer[3];
498
499 /**
500 * stride of the luminance part of the dr buffer
501 * encoding: unused
502 * decoding: set by user
503 */
504 int dr_stride;
505
506 /**
507 * same behavior as dr_buffer, just for some private data of the user
508 * encoding: unused
509 * decoding: set by user in get_buffer_callback, and set by lavc at end of frame
510 */
511 void *dr_opaque_frame;
512
513 /**
514 * called at the beginning of each frame to get a buffer for it
515 * encoding: unused
516 * decoding: set by user
517 */
518 int (*get_buffer_callback)(struct AVCodecContext *c, int width, int height, int pict_type);
519
520 /**
521 * is 1 if the decoded stream contains b frames, 0 otherwise
522 * encoding: unused
523 * decoding: set by lavc
524 */
525 int has_b_frames;
526
527 /**
528 * stride of the chrominance part of the dr buffer
529 * encoding: unused
530 * decoding: set by user
531 */
532 int dr_uvstride;
533
534 /**
535 * number of dr buffers
536 * encoding: unused
537 * decoding: set by user
538 */
539 int dr_ip_buffer_count;
540
541 int block_align; /* used by some WAV based audio codecs */
542
543 int parse_only; /* decoding only: if true, only parsing is done
544 (function avcodec_parse_frame()). The frame
545 data is returned. Only MPEG codecs support this now. */
546
547 /**
548 * 0-> h263 quant 1-> mpeg quant
549 * encoding: set by user.
550 * decoding: unused
551 */
552 int mpeg_quant;
553
554 /**
555 * pass1 encoding statistics output buffer
556 * encoding: set by lavc
557 * decoding: unused
558 */
559 char *stats_out; /* encoding statistics output buffer */
560
561 /**
562 * pass2 encoding statistics input buffer.
563 * concatenated stuff from stats_out of pass1 should be placed here
564 * encoding: allocated/set/freed by user
565 * decoding: unused
566 */
567 char *stats_in;
568
569 /**
570 * ratecontrol qmin qmax limiting method
571 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
572 * encoding: set by user.
573 * decoding: unused
574 */
575 float rc_qsquish;
576
577 float rc_qmod_amp;
578 int rc_qmod_freq;
579
580 /**
581 * ratecontrol override, see RcOverride
582 * encoding: allocated/set/freed by user.
583 * decoding: unused
584 */
585 RcOverride *rc_override;
586 int rc_override_count;
587
588 /**
589 * rate control equation
590 * encoding: set by user
591 * decoding: unused
592 */
593 char *rc_eq;
594
595 /**
596 * maximum bitrate
597 * encoding: set by user.
598 * decoding: unused
599 */
600 int rc_max_rate;
601
602 /**
603 * minimum bitrate
604 * encoding: set by user.
605 * decoding: unused
606 */
607 int rc_min_rate;
608
609 /**
610 * decoder bitstream buffer size
611 * encoding: set by user.
612 * decoding: unused
613 */
614 int rc_buffer_size;
615 float rc_buffer_aggressivity;
616
617 /**
618 * qscale factor between p and i frames
619 * encoding: set by user.
620 * decoding: unused
621 */
622 float i_quant_factor;
623
624 /**
625 * qscale offset between p and i frames
626 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
627 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
628 * encoding: set by user.
629 * decoding: unused
630 */
631 float i_quant_offset;
632
633 /**
634 * initial complexity for pass1 ratecontrol
635 * encoding: set by user.
636 * decoding: unused
637 */
638 float rc_initial_cplx;
639
640 /**
641 * custom aspect ratio, used if aspect_info==FF_ASPECT_EXTENDED
642 * encoding: set by user.
643 * decoding: set by lavc.
644 */
645 int aspected_width;
646 int aspected_height;
647
648 /**
649 * dct algorithm, see FF_DCT_* below
650 * encoding: set by user
651 * decoding: unused
652 */
653 int dct_algo;
654 #define FF_DCT_AUTO 0
655 #define FF_DCT_FASTINT 1
656 #define FF_DCT_INT 2
657 #define FF_DCT_MMX 3
658 #define FF_DCT_MLIB 4
659 #define FF_DCT_ALTIVEC 5
660
661 /**
662 * presentation timestamp in micro seconds (time when frame should be shown to user)
663 * if 0 then the frame_rate will be used as reference
664 * encoding: set by user
665 * decoding; set by lavc
666 */
667 long long int pts;
668
669 /**
670 * luminance masking (0-> disabled)
671 * encoding: set by user
672 * decoding: unused
673 */
674 float lumi_masking;
675
676 /**
677 * temporary complexity masking (0-> disabled)
678 * encoding: set by user
679 * decoding: unused
680 */
681 float temporal_cplx_masking;
682
683 /**
684 * spatial complexity masking (0-> disabled)
685 * encoding: set by user
686 * decoding: unused
687 */
688 float spatial_cplx_masking;
689
690 /**
691 * p block masking (0-> disabled)
692 * encoding: set by user
693 * decoding: unused
694 */
695 float p_masking;
696
697 /**
698 * darkness masking (0-> disabled)
699 * encoding: set by user
700 * decoding: unused
701 */
702 float dark_masking;
703
704 /**
705 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A')
706 * this is used to workaround some encoder bugs
707 * encoding: unused
708 * decoding: set by user, will be converted to upper case by lavc during init
709 */
710 int fourcc;
711
712 /**
713 * idct algorithm, see FF_IDCT_* below
714 * encoding: set by user
715 * decoding: set by user
716 */
717 int idct_algo;
718 #define FF_IDCT_AUTO 0
719 #define FF_IDCT_INT 1
720 #define FF_IDCT_SIMPLE 2
721 #define FF_IDCT_SIMPLEMMX 3
722 #define FF_IDCT_LIBMPEG2MMX 4
723 #define FF_IDCT_PS2 5
724 #define FF_IDCT_MLIB 6
725 #define FF_IDCT_ARM 7
726 #define FF_IDCT_ALTIVEC 8
727
728 /**
729 * slice count
730 * encoding: set by lavc
731 * decoding: set by user (or 0)
732 */
733 int slice_count;
734 /**
735 * slice offsets in the frame in bytes
736 * encoding: set/allocated by lavc
737 * decoding: set/allocated by user (or NULL)
738 */
739 int *slice_offset;
740
741 /**
742 * error concealment flags
743 * encoding: unused
744 * decoding: set by user
745 */
746 int error_concealment;
747 #define FF_EC_GUESS_MVS 1
748 #define FF_EC_DEBLOCK 2
749
750 /**
751 * QP table of the currently decoded frame
752 * encoding; unused
753 * decoding: set by lavc
754 */
755 int8_t *current_qscale_table;
756 /**
757 * QP table of the currently displayed frame
758 * encoding; unused
759 * decoding: set by lavc
760 */
761 int8_t *display_qscale_table;
762 /**
763 * force specific pict_type.
764 * encoding; set by user (I/P/B_TYPE)
765 * decoding: unused
766 */
767 int force_type;
768 /**
769 * dsp_mask could be used to disable unwanted
770 * CPU features (i.e. MMX, SSE. ...)
771 */
772 unsigned dsp_mask;
773 } AVCodecContext;
774
775 typedef struct AVCodec {
776 const char *name;
777 int type;
778 int id;
779 int priv_data_size;
780 int (*init)(AVCodecContext *);
781 int (*encode)(AVCodecContext *, UINT8 *buf, int buf_size, void *data);
782 int (*close)(AVCodecContext *);
783 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
784 UINT8 *buf, int buf_size);
785 int capabilities;
786 struct AVCodec *next;
787 } AVCodec;
788
789 /**
790 * four components are given, that's all.
791 * the last component is alpha
792 */
793 typedef struct AVPicture {
794 UINT8 *data[4];
795 int linesize[4];
796 } AVPicture;
797
798 extern AVCodec ac3_encoder;
799 extern AVCodec mp2_encoder;
800 extern AVCodec mp3lame_encoder;
801 extern AVCodec oggvorbis_encoder;
802 extern AVCodec mpeg1video_encoder;
803 extern AVCodec h263_encoder;
804 extern AVCodec h263p_encoder;
805 extern AVCodec rv10_encoder;
806 extern AVCodec mjpeg_encoder;
807 extern AVCodec mpeg4_encoder;
808 extern AVCodec msmpeg4v1_encoder;
809 extern AVCodec msmpeg4v2_encoder;
810 extern AVCodec msmpeg4v3_encoder;
811 extern AVCodec wmv1_encoder;
812 extern AVCodec wmv2_encoder;
813
814 extern AVCodec h263_decoder;
815 extern AVCodec mpeg4_decoder;
816 extern AVCodec msmpeg4v1_decoder;
817 extern AVCodec msmpeg4v2_decoder;
818 extern AVCodec msmpeg4v3_decoder;
819 extern AVCodec wmv1_decoder;
820 extern AVCodec wmv2_decoder;
821 extern AVCodec mpeg_decoder;
822 extern AVCodec h263i_decoder;
823 extern AVCodec rv10_decoder;
824 extern AVCodec svq1_decoder;
825 extern AVCodec dvvideo_decoder;
826 extern AVCodec dvaudio_decoder;
827 extern AVCodec wmav1_decoder;
828 extern AVCodec wmav2_decoder;
829 extern AVCodec mjpeg_decoder;
830 extern AVCodec mp2_decoder;
831 extern AVCodec mp3_decoder;
832 extern AVCodec mace3_decoder;
833 extern AVCodec mace6_decoder;
834
835 /* pcm codecs */
836 #define PCM_CODEC(id, name) \
837 extern AVCodec name ## _decoder; \
838 extern AVCodec name ## _encoder
839
840 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
841 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
842 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
843 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
844 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
845 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
846 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
847 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
848
849 /* adpcm codecs */
850
851 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
852 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
853 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
854
855 #undef PCM_CODEC
856
857 /* dummy raw video codec */
858 extern AVCodec rawvideo_codec;
859
860 /* the following codecs use external GPL libs */
861 extern AVCodec ac3_decoder;
862
863 /* resample.c */
864
865 struct ReSampleContext;
866
867 typedef struct ReSampleContext ReSampleContext;
868
869 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
870 int output_rate, int input_rate);
871 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
872 void audio_resample_close(ReSampleContext *s);
873
874 /* YUV420 format is assumed ! */
875
876 struct ImgReSampleContext;
877
878 typedef struct ImgReSampleContext ImgReSampleContext;
879
880 ImgReSampleContext *img_resample_init(int output_width, int output_height,
881 int input_width, int input_height);
882
883 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
884 int iwidth, int iheight,
885 int topBand, int bottomBand,
886 int leftBand, int rightBand);
887
888 void img_resample(ImgReSampleContext *s,
889 AVPicture *output, AVPicture *input);
890
891 void img_resample_close(ImgReSampleContext *s);
892
893 void avpicture_fill(AVPicture *picture, UINT8 *ptr,
894 int pix_fmt, int width, int height);
895 int avpicture_get_size(int pix_fmt, int width, int height);
896
897 /* convert among pixel formats */
898 int img_convert(AVPicture *dst, int dst_pix_fmt,
899 AVPicture *src, int pix_fmt,
900 int width, int height);
901
902 /* deinterlace a picture */
903 int avpicture_deinterlace(AVPicture *dst, AVPicture *src,
904 int pix_fmt, int width, int height);
905
906 /* external high level API */
907
908 extern AVCodec *first_avcodec;
909
910 /* returns LIBAVCODEC_VERSION_INT constant */
911 unsigned avcodec_version(void);
912 /* returns LIBAVCODEC_BUILD constant */
913 unsigned avcodec_build(void);
914 void avcodec_init(void);
915
916 void avcodec_set_bit_exact(void);
917
918 void register_avcodec(AVCodec *format);
919 AVCodec *avcodec_find_encoder(enum CodecID id);
920 AVCodec *avcodec_find_encoder_by_name(const char *name);
921 AVCodec *avcodec_find_decoder(enum CodecID id);
922 AVCodec *avcodec_find_decoder_by_name(const char *name);
923 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
924
925 AVCodecContext *avcodec_alloc_context(void);
926 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
927 int avcodec_decode_audio(AVCodecContext *avctx, INT16 *samples,
928 int *frame_size_ptr,
929 UINT8 *buf, int buf_size);
930 int avcodec_decode_video(AVCodecContext *avctx, AVPicture *picture,
931 int *got_picture_ptr,
932 UINT8 *buf, int buf_size);
933 int avcodec_parse_frame(AVCodecContext *avctx, UINT8 **pdata,
934 int *data_size_ptr,
935 UINT8 *buf, int buf_size);
936 int avcodec_encode_audio(AVCodecContext *avctx, UINT8 *buf, int buf_size,
937 const short *samples);
938 int avcodec_encode_video(AVCodecContext *avctx, UINT8 *buf, int buf_size,
939 const AVPicture *pict);
940
941 int avcodec_close(AVCodecContext *avctx);
942
943 void avcodec_register_all(void);
944
945 void avcodec_flush_buffers(AVCodecContext *avctx);
946
947 /**
948 * Interface for 0.5.0 version
949 *
950 * do not even think about it's usage for this moment
951 */
952
953 typedef struct {
954 // compressed size used from given memory buffer
955 int size;
956 /// I/P/B frame type
957 int frame_type;
958 } avc_enc_result_t;
959
960 /**
961 * Commands
962 * order can't be changed - once it was defined
963 */
964 typedef enum {
965 // general commands
966 AVC_OPEN_BY_NAME = 0xACA000,
967 AVC_OPEN_BY_CODEC_ID,
968 AVC_OPEN_BY_FOURCC,
969 AVC_CLOSE,
970
971 AVC_FLUSH,
972 // pin - struct { uint8_t* src, uint_t src_size }
973 // pout - struct { AVPicture* img, consumed_bytes,
974 AVC_DECODE,
975 // pin - struct { AVPicture* img, uint8_t* dest, uint_t dest_size }
976 // pout - uint_t used_from_dest_size
977 AVC_ENCODE,
978
979 // query/get video commands
980 AVC_GET_VERSION = 0xACB000,
981 AVC_GET_WIDTH,
982 AVC_GET_HEIGHT,
983 AVC_GET_DELAY,
984 AVC_GET_QUANT_TABLE,
985 // ...
986
987 // query/get audio commands
988 AVC_GET_FRAME_SIZE = 0xABC000,
989
990 // maybe define some simple structure which
991 // might be passed to the user - but they can't
992 // contain any codec specific parts and these
993 // calls are usualy necessary only few times
994
995 // set video commands
996 AVC_SET_WIDTH = 0xACD000,
997 AVC_SET_HEIGHT,
998
999 // set video encoding commands
1000 AVC_SET_FRAME_RATE = 0xACD800,
1001 AVC_SET_QUALITY,
1002 AVC_SET_HURRY_UP,
1003
1004 // set audio commands
1005 AVC_SET_SAMPLE_RATE = 0xACE000,
1006 AVC_SET_CHANNELS,
1007
1008 } avc_cmd_t;
1009
1010 /**
1011 * \param handle allocated private structure by libavcodec
1012 * for initialization pass NULL - will be returned pout
1013 * user is supposed to know nothing about its structure
1014 * \param cmd type of operation to be performed
1015 * \param pint input parameter
1016 * \param pout output parameter
1017 *
1018 * \returns command status - eventually for query command it might return
1019 * integer resulting value
1020 */
1021 int avcodec(void* handle, avc_cmd_t cmd, void* pin, void* pout);
1022
1023 /* memory */
1024 void *av_malloc(unsigned int size);
1025 void *av_mallocz(unsigned int size);
1026 void av_free(void *ptr);
1027 void __av_freep(void **ptr);
1028 #define av_freep(p) __av_freep((void **)(p))
1029
1030 #endif /* AVCODEC_H */