huffyuv
[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 4639
9 #define LIBAVCODEC_BUILD_STR "4639"
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 CODEC_ID_HUFFYUV,
38
39 /* various pcm "codecs" */
40 CODEC_ID_PCM_S16LE,
41 CODEC_ID_PCM_S16BE,
42 CODEC_ID_PCM_U16LE,
43 CODEC_ID_PCM_U16BE,
44 CODEC_ID_PCM_S8,
45 CODEC_ID_PCM_U8,
46 CODEC_ID_PCM_MULAW,
47 CODEC_ID_PCM_ALAW,
48
49 /* various adpcm codecs */
50 CODEC_ID_ADPCM_IMA_QT,
51 CODEC_ID_ADPCM_IMA_WAV,
52 CODEC_ID_ADPCM_MS,
53 };
54
55 enum CodecType {
56 CODEC_TYPE_UNKNOWN = -1,
57 CODEC_TYPE_VIDEO,
58 CODEC_TYPE_AUDIO,
59 };
60
61 enum PixelFormat {
62 PIX_FMT_ANY = -1,
63 PIX_FMT_YUV420P,
64 PIX_FMT_YUV422,
65 PIX_FMT_RGB24,
66 PIX_FMT_BGR24,
67 PIX_FMT_YUV422P,
68 PIX_FMT_YUV444P,
69 PIX_FMT_RGBA32,
70 PIX_FMT_BGRA32,
71 PIX_FMT_YUV410P,
72 PIX_FMT_YUV411P
73 };
74
75 /* currently unused, may be used if 24/32 bits samples ever supported */
76 enum SampleFormat {
77 SAMPLE_FMT_S16 = 0, /* signed 16 bits */
78 };
79
80 /* in bytes */
81 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 131072
82
83 /**
84 * Required number of zero bytes at the end of the input bitstream for decoding.
85 * to avoid overreading (and possibly segfaulting)
86 */
87 #define FF_INPUT_BUFFER_PADDING_SIZE 8
88
89 /* motion estimation type, EPZS by default */
90 enum Motion_Est_ID {
91 ME_ZERO = 1,
92 ME_FULL,
93 ME_LOG,
94 ME_PHODS,
95 ME_EPZS,
96 ME_X1
97 };
98
99 typedef struct RcOverride{
100 int start_frame;
101 int end_frame;
102 int qscale; // if this is 0 then quality_factor will be used instead
103 float quality_factor;
104 } RcOverride;
105
106 /* only for ME compatiblity with old apps */
107 extern int motion_estimation_method;
108
109 /* ME algos sorted by quality */
110 static const int Motion_Est_QTab[] = { ME_ZERO, ME_PHODS, ME_LOG,
111 ME_X1, ME_EPZS, ME_FULL };
112
113
114 #define FF_MAX_B_FRAMES 4
115
116 /* encoding support
117 these flags can be passed in AVCodecContext.flags before initing
118 Note: note not everything is supported yet
119 */
120
121 #define CODEC_FLAG_HQ 0x0001 /* brute force MB-type decission mode (slow) */
122 #define CODEC_FLAG_QSCALE 0x0002 /* use fixed qscale */
123 #define CODEC_FLAG_4MV 0x0004 /* 4 MV per MB allowed */
124 #define CODEC_FLAG_QPEL 0x0010 /* use qpel MC */
125 #define CODEC_FLAG_GMC 0x0020 /* use GMC */
126 #define CODEC_FLAG_PART 0x0080 /* use data partitioning */
127 /* parent program gurantees that the input for b-frame containing streams is not written to
128 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
129 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
130 #define CODEC_FLAG_PASS1 0x0200 /* use internal 2pass ratecontrol in first pass mode */
131 #define CODEC_FLAG_PASS2 0x0400 /* use internal 2pass ratecontrol in second pass mode */
132 #define CODEC_FLAG_EXTERN_HUFF 0x1000 /* use external huffman table (for mjpeg) */
133 #define CODEC_FLAG_GRAY 0x2000 /* only decode/encode grayscale */
134 #define CODEC_FLAG_EMU_EDGE 0x4000/* dont draw edges */
135 #define CODEC_FLAG_DR1 0x8000 /* direct renderig type 1 (store internal frames in external buffers) */
136 #define CODEC_FLAG_TRUNCATED 0x00010000 /* input bitstream might be truncated at a random location instead
137 of only at frame boundaries */
138 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 /* normalize adaptive quantization */
139 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 /* use interlaced dct */
140 #define CODEC_FLAG_LOW_DELAY 0x00080000 /* force low delay / will fail on b frames */
141
142 /* codec capabilities */
143
144 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 /* decoder can use draw_horiz_band callback */
145 #define CODEC_CAP_DR1 0x0002 /* direct rendering method 1 */
146 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
147 used */
148 #define CODEC_CAP_PARSE_ONLY 0x0004
149 #define CODEC_CAP_TRUNCATED 0x0008
150
151 #define FRAME_RATE_BASE 10000
152
153 typedef struct AVCodecContext {
154 /**
155 * the average bitrate
156 * encoding: set by user. unused for constant quantizer encoding
157 * decoding: set by lavc. 0 or some bitrate if this info is available in the stream
158 */
159 int bit_rate;
160
161 /**
162 * number of bits the bitstream is allowed to diverge from the reference
163 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
164 * encoding: set by user. unused for constant quantizer encoding
165 * decoding: unused
166 */
167 int bit_rate_tolerance;
168
169 /**
170 * CODEC_FLAG_*
171 * encoding: set by user.
172 * decoding: set by user.
173 */
174 int flags;
175
176 /**
177 * some codecs needs additionnal format info. It is stored here
178 * encoding: set by user.
179 * decoding: set by lavc. (FIXME is this ok?)
180 */
181 int sub_id;
182
183 /**
184 * motion estimation algorithm used for video coding
185 * encoding: set by user.
186 * decoding: unused
187 */
188 int me_method;
189
190 /**
191 * some codecs need / can use extra-data like huffman tables
192 * mjpeg: huffman tables
193 * rv10: additional flags
194 * mpeg4: global headers (they can be in the bitstream or here)
195 * encoding: set/allocated/freed by lavc.
196 * decoding: set/allocated/freed by user.
197 */
198 void *extradata;
199 int extradata_size;
200
201 /* video only */
202 /**
203 * frames per sec multiplied by FRAME_RATE_BASE
204 * for variable fps this is the precission, so if the timestamps
205 * can be specified in msec precssion then this is 1000*FRAME_RATE_BASE
206 * encoding: set by user
207 * decoding: set by lavc. 0 or the frame_rate if available
208 */
209 int frame_rate;
210
211 /**
212 * encoding: set by user.
213 * decoding: set by user, some codecs might override / change it during playback
214 */
215 int width, height;
216
217 /**
218 * encoding: set by user. 0 if not known
219 * decoding: set by lavc. 0 if not known
220 */
221 int aspect_ratio_info;
222 #define FF_ASPECT_SQUARE 1
223 #define FF_ASPECT_4_3_625 2
224 #define FF_ASPECT_4_3_525 3
225 #define FF_ASPECT_16_9_625 4
226 #define FF_ASPECT_16_9_525 5
227 #define FF_ASPECT_EXTENDED 15
228
229 /**
230 * the number of pictures in a group of pitures, or 0 for intra_only
231 * encoding: set by user.
232 * decoding: unused
233 */
234 int gop_size;
235
236 /**
237 * pixel format, see PIX_FMT_xxx
238 * encoding: unused
239 * decoding: set by lavc.
240 */
241 enum PixelFormat pix_fmt;
242
243 int repeat_pict; /* when decoding, this signal how much the picture */
244 /* must be delayed. */
245 /* extra_delay = (repeat_pict / 2) * (1/fps) */
246
247 /**
248 * if non NULL, 'draw_horiz_band' is called by the libavcodec
249 * decoder to draw an horizontal band. It improve cache usage. Not
250 * all codecs can do that. You must check the codec capabilities
251 * before
252 * encoding: unused
253 * decoding: set by user.
254 */
255 void (*draw_horiz_band)(struct AVCodecContext *s,
256 UINT8 **src_ptr, int linesize,
257 int y, int width, int height);
258
259 /* audio only */
260 int sample_rate; /* samples per sec */
261 int channels;
262 int sample_fmt; /* sample format, currenly unused */
263
264 /* the following data should not be initialized */
265 int frame_size; /* in samples, initialized when calling 'init' */
266 int frame_number; /* audio or video frame number */
267 int real_pict_num; /* returns the real picture number of
268 previous encoded frame */
269
270 /**
271 * 1 -> keyframe, 0-> not
272 * encoding: set by lavc (for the outputed bitstream, not the input frame)
273 * decoding: set by lavc (for the decoded bitstream, not the displayed frame)
274 */
275 int key_frame;
276
277 /**
278 * picture type of the previous en/decoded frame, see ?_TYPE below
279 * encoding: set by lavc (for the outputed bitstream, not the input frame)
280 * decoding: set by lavc (for the decoded bitstream, not the displayed frame)
281 */
282 int pict_type;
283 /* FIXME: these should have FF_ */
284 #define I_TYPE 1 // Intra
285 #define P_TYPE 2 // Predicted
286 #define B_TYPE 3 // Bi-dir predicted
287 #define S_TYPE 4 // S(GMC)-VOP MPEG4
288
289 /**
290 * number of frames the decoded output will be delayed relative to
291 * the encoded input
292 * encoding: set by lavc.
293 * decoding: unused
294 */
295 int delay;
296
297 /**
298 * mbskip_table[mb]=1 if MB didnt change, is only valid for I/P frames
299 * stride= mb_width = (width+15)>>4 (FIXME export stride?)
300 * encoding: unused
301 * decoding: set by lavc
302 */
303 uint8_t *mbskip_table;
304
305 /* encoding parameters */
306 /**
307 * quality (between 1 (good) and 31 (bad))
308 * encoding: set by user if CODEC_FLAG_QSCALE is set otherwise set by lavc
309 * decoding: set by lavc
310 */
311 int quality; /* quality of the previous encoded frame
312
313 this is allso used to set the quality in vbr mode
314 and the per frame quality in CODEC_FLAG_TYPE (second pass mode) */
315 float qcompress; /* amount of qscale change between easy & hard scenes (0.0-1.0)*/
316 float qblur; /* amount of qscale smoothing over time (0.0-1.0) */
317
318 /**
319 * minimum quantizer
320 * encoding: set by user.
321 * decoding: unused
322 */
323 int qmin;
324
325 /**
326 * maximum quantizer
327 * encoding: set by user.
328 * decoding: unused
329 */
330 int qmax;
331
332 /**
333 * maximum quantizer difference etween frames
334 * encoding: set by user.
335 * decoding: unused
336 */
337 int max_qdiff;
338
339 /**
340 * maximum number of b frames between non b frames
341 * note: the output will be delayed by max_b_frames+1 relative to the input
342 * encoding: set by user.
343 * decoding: unused
344 */
345 int max_b_frames;
346
347 /**
348 * qscale factor between ip and b frames
349 * encoding: set by user.
350 * decoding: unused
351 */
352 float b_quant_factor;
353
354 /** obsolete FIXME remove */
355 int rc_strategy;
356 int b_frame_strategy;
357
358 /**
359 * encoding: unused
360 * decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
361 */
362 int hurry_up;
363
364 struct AVCodec *codec;
365
366 void *priv_data;
367
368 /* The following data is for RTP friendly coding */
369 /* By now only H.263/H.263+/MPEG4 coder honours this */
370 int rtp_mode; /* 1 for activate RTP friendly-mode */
371 /* highers numbers represent more error-prone */
372 /* enviroments, by now just "1" exist */
373
374 int rtp_payload_size; /* The size of the RTP payload, the coder will */
375 /* do it's best to deliver a chunk with size */
376 /* below rtp_payload_size, the chunk will start */
377 /* with a start code on some codecs like H.263 */
378 /* This doesn't take account of any particular */
379 /* headers inside the transmited RTP payload */
380
381
382 /* The RTP callcack: This function is called */
383 /* every time the encoder as a packet to send */
384 /* Depends on the encoder if the data starts */
385 /* with a Start Code (it should) H.263 does */
386 void (*rtp_callback)(void *data, int size, int packet_number);
387
388 /**
389 * if you set get_psnr to 1 then after encoding you will have the
390 * PSNR on psnr_y/cb/cr
391 * encoding: set by user (1-> on, 0-> off)
392 * decoding: unused
393 */
394 int get_psnr;
395 float psnr_y;
396 float psnr_cb;
397 float psnr_cr;
398
399 /* statistics, used for 2-pass encoding */
400 int mv_bits;
401 int header_bits;
402 int i_tex_bits;
403 int p_tex_bits;
404 int i_count;
405 int p_count;
406 int skip_count;
407 int misc_bits;
408
409 /**
410 * number of bits used for the previously encoded frame
411 * encoding: set by lavc
412 * decoding: - for audio - bits_per_sample
413 */
414 int frame_bits;
415
416 /**
417 * private data of the user, can be used to carry app specific stuff
418 * encoding: set by user
419 * decoding: set by user
420 */
421 void *opaque;
422
423 char codec_name[32];
424 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
425 enum CodecID codec_id; /* see CODEC_ID_xxx */
426 unsigned int codec_tag; /* codec tag, only used if unknown codec */
427
428 /**
429 * workaround bugs in encoders which sometimes cannot be detected automatically
430 * encoding: unused
431 * decoding: set by user
432 */
433 int workaround_bugs;
434 #define FF_BUG_AUTODETECT 1 //autodetection
435 #define FF_BUG_OLD_MSMPEG4 2
436 #define FF_BUG_XVID_ILACE 4
437 #define FF_BUG_UMP4 8
438 #define FF_BUG_NO_PADDING 16
439 #define FF_BUG_AC_VLC 32
440 #define FF_BUG_QPEL_CHROMA 64
441 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
442
443 /**
444 * encoding: set by user
445 * decoding: unused
446 */
447 int luma_elim_threshold;
448
449 /**
450 * encoding: set by user
451 * decoding: unused
452 */
453 int chroma_elim_threshold;
454
455 /**
456 * strictly follow the std (MPEG4, ...)
457 * encoding: set by user
458 * decoding: unused
459 */
460 int strict_std_compliance;
461
462 /**
463 * qscale offset between ip and b frames
464 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
465 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
466 * encoding: set by user.
467 * decoding: unused
468 */
469 float b_quant_offset;
470
471 /**
472 * error resilience {-1,0,1} higher values will detect more errors but may missdetect
473 * some more or less valid parts as errors
474 * encoding: unused
475 * decoding: set by user
476 */
477 int error_resilience;
478
479 /**
480 * obsolete, just here to keep ABI compatible (should be removed perhaps, dunno)
481 */
482 int *quant_store;
483
484 /**
485 * QP store stride
486 * encoding: unused
487 * decoding: set by lavc
488 */
489 int qstride;
490
491 /**
492 * buffer, where the next picture should be decoded into
493 * encoding: unused
494 * decoding: set by user in get_buffer_callback to a buffer into which the next part
495 * of the bitstream will be decoded, and set by lavc at end of frame to the
496 * next frame which needs to be displayed
497 */
498 uint8_t *dr_buffer[3];
499
500 /**
501 * stride of the luminance part of the dr buffer
502 * encoding: unused
503 * decoding: set by user
504 */
505 int dr_stride;
506
507 /**
508 * same behavior as dr_buffer, just for some private data of the user
509 * encoding: unused
510 * decoding: set by user in get_buffer_callback, and set by lavc at end of frame
511 */
512 void *dr_opaque_frame;
513
514 /**
515 * called at the beginning of each frame to get a buffer for it
516 * encoding: unused
517 * decoding: set by user
518 */
519 int (*get_buffer_callback)(struct AVCodecContext *c, int width, int height, int pict_type);
520
521 /**
522 * is 1 if the decoded stream contains b frames, 0 otherwise
523 * encoding: unused
524 * decoding: set by lavc
525 */
526 int has_b_frames;
527
528 /**
529 * stride of the chrominance part of the dr buffer
530 * encoding: unused
531 * decoding: set by user
532 */
533 int dr_uvstride;
534
535 /**
536 * number of dr buffers
537 * encoding: unused
538 * decoding: set by user
539 */
540 int dr_ip_buffer_count;
541
542 int block_align; /* used by some WAV based audio codecs */
543
544 int parse_only; /* decoding only: if true, only parsing is done
545 (function avcodec_parse_frame()). The frame
546 data is returned. Only MPEG codecs support this now. */
547
548 /**
549 * 0-> h263 quant 1-> mpeg quant
550 * encoding: set by user.
551 * decoding: unused
552 */
553 int mpeg_quant;
554
555 /**
556 * pass1 encoding statistics output buffer
557 * encoding: set by lavc
558 * decoding: unused
559 */
560 char *stats_out; /* encoding statistics output buffer */
561
562 /**
563 * pass2 encoding statistics input buffer.
564 * concatenated stuff from stats_out of pass1 should be placed here
565 * encoding: allocated/set/freed by user
566 * decoding: unused
567 */
568 char *stats_in;
569
570 /**
571 * ratecontrol qmin qmax limiting method
572 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
573 * encoding: set by user.
574 * decoding: unused
575 */
576 float rc_qsquish;
577
578 float rc_qmod_amp;
579 int rc_qmod_freq;
580
581 /**
582 * ratecontrol override, see RcOverride
583 * encoding: allocated/set/freed by user.
584 * decoding: unused
585 */
586 RcOverride *rc_override;
587 int rc_override_count;
588
589 /**
590 * rate control equation
591 * encoding: set by user
592 * decoding: unused
593 */
594 char *rc_eq;
595
596 /**
597 * maximum bitrate
598 * encoding: set by user.
599 * decoding: unused
600 */
601 int rc_max_rate;
602
603 /**
604 * minimum bitrate
605 * encoding: set by user.
606 * decoding: unused
607 */
608 int rc_min_rate;
609
610 /**
611 * decoder bitstream buffer size
612 * encoding: set by user.
613 * decoding: unused
614 */
615 int rc_buffer_size;
616 float rc_buffer_aggressivity;
617
618 /**
619 * qscale factor between p and i frames
620 * encoding: set by user.
621 * decoding: unused
622 */
623 float i_quant_factor;
624
625 /**
626 * qscale offset between p and i frames
627 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
628 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
629 * encoding: set by user.
630 * decoding: unused
631 */
632 float i_quant_offset;
633
634 /**
635 * initial complexity for pass1 ratecontrol
636 * encoding: set by user.
637 * decoding: unused
638 */
639 float rc_initial_cplx;
640
641 /**
642 * custom aspect ratio, used if aspect_info==FF_ASPECT_EXTENDED
643 * encoding: set by user.
644 * decoding: set by lavc.
645 */
646 int aspected_width;
647 int aspected_height;
648
649 /**
650 * dct algorithm, see FF_DCT_* below
651 * encoding: set by user
652 * decoding: unused
653 */
654 int dct_algo;
655 #define FF_DCT_AUTO 0
656 #define FF_DCT_FASTINT 1
657 #define FF_DCT_INT 2
658 #define FF_DCT_MMX 3
659 #define FF_DCT_MLIB 4
660 #define FF_DCT_ALTIVEC 5
661
662 /**
663 * presentation timestamp in micro seconds (time when frame should be shown to user)
664 * if 0 then the frame_rate will be used as reference
665 * encoding: set by user
666 * decoding; set by lavc
667 */
668 long long int pts;
669
670 /**
671 * luminance masking (0-> disabled)
672 * encoding: set by user
673 * decoding: unused
674 */
675 float lumi_masking;
676
677 /**
678 * temporary complexity masking (0-> disabled)
679 * encoding: set by user
680 * decoding: unused
681 */
682 float temporal_cplx_masking;
683
684 /**
685 * spatial complexity masking (0-> disabled)
686 * encoding: set by user
687 * decoding: unused
688 */
689 float spatial_cplx_masking;
690
691 /**
692 * p block masking (0-> disabled)
693 * encoding: set by user
694 * decoding: unused
695 */
696 float p_masking;
697
698 /**
699 * darkness masking (0-> disabled)
700 * encoding: set by user
701 * decoding: unused
702 */
703 float dark_masking;
704
705 /**
706 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A')
707 * this is used to workaround some encoder bugs
708 * encoding: unused
709 * decoding: set by user, will be converted to upper case by lavc during init
710 */
711 int fourcc;
712
713 /**
714 * idct algorithm, see FF_IDCT_* below
715 * encoding: set by user
716 * decoding: set by user
717 */
718 int idct_algo;
719 #define FF_IDCT_AUTO 0
720 #define FF_IDCT_INT 1
721 #define FF_IDCT_SIMPLE 2
722 #define FF_IDCT_SIMPLEMMX 3
723 #define FF_IDCT_LIBMPEG2MMX 4
724 #define FF_IDCT_PS2 5
725 #define FF_IDCT_MLIB 6
726 #define FF_IDCT_ARM 7
727 #define FF_IDCT_ALTIVEC 8
728
729 /**
730 * slice count
731 * encoding: set by lavc
732 * decoding: set by user (or 0)
733 */
734 int slice_count;
735 /**
736 * slice offsets in the frame in bytes
737 * encoding: set/allocated by lavc
738 * decoding: set/allocated by user (or NULL)
739 */
740 int *slice_offset;
741
742 /**
743 * error concealment flags
744 * encoding: unused
745 * decoding: set by user
746 */
747 int error_concealment;
748 #define FF_EC_GUESS_MVS 1
749 #define FF_EC_DEBLOCK 2
750
751 /**
752 * QP table of the currently decoded frame
753 * encoding; unused
754 * decoding: set by lavc
755 */
756 int8_t *current_qscale_table;
757 /**
758 * QP table of the currently displayed frame
759 * encoding; unused
760 * decoding: set by lavc
761 */
762 int8_t *display_qscale_table;
763 /**
764 * force specific pict_type.
765 * encoding; set by user (I/P/B_TYPE)
766 * decoding: unused
767 */
768 int force_type;
769 /**
770 * dsp_mask could be used to disable unwanted
771 * CPU features (i.e. MMX, SSE. ...)
772 */
773 unsigned dsp_mask;
774
775 /**
776 * bits per sample/pixel from the demuxer (needed for huffyuv)
777 * encoding; set by lavc
778 * decoding: set by user
779 */
780 int bits_per_sample;
781
782 /**
783 * prediction method (needed for huffyuv)
784 * encoding; set by user
785 * decoding: unused
786 */
787 int prediction_method;
788 #define FF_PRED_LEFT 0
789 #define FF_PRED_PLANE 1
790 #define FF_PRED_MEDIAN 2
791 } AVCodecContext;
792
793 typedef struct AVCodec {
794 const char *name;
795 int type;
796 int id;
797 int priv_data_size;
798 int (*init)(AVCodecContext *);
799 int (*encode)(AVCodecContext *, UINT8 *buf, int buf_size, void *data);
800 int (*close)(AVCodecContext *);
801 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
802 UINT8 *buf, int buf_size);
803 int capabilities;
804 struct AVCodec *next;
805 } AVCodec;
806
807 /**
808 * four components are given, that's all.
809 * the last component is alpha
810 */
811 typedef struct AVPicture {
812 UINT8 *data[4];
813 int linesize[4];
814 } AVPicture;
815
816 extern AVCodec ac3_encoder;
817 extern AVCodec mp2_encoder;
818 extern AVCodec mp3lame_encoder;
819 extern AVCodec oggvorbis_encoder;
820 extern AVCodec mpeg1video_encoder;
821 extern AVCodec h263_encoder;
822 extern AVCodec h263p_encoder;
823 extern AVCodec rv10_encoder;
824 extern AVCodec mjpeg_encoder;
825 extern AVCodec mpeg4_encoder;
826 extern AVCodec msmpeg4v1_encoder;
827 extern AVCodec msmpeg4v2_encoder;
828 extern AVCodec msmpeg4v3_encoder;
829 extern AVCodec wmv1_encoder;
830 extern AVCodec wmv2_encoder;
831 extern AVCodec huffyuv_encoder;
832
833 extern AVCodec h263_decoder;
834 extern AVCodec mpeg4_decoder;
835 extern AVCodec msmpeg4v1_decoder;
836 extern AVCodec msmpeg4v2_decoder;
837 extern AVCodec msmpeg4v3_decoder;
838 extern AVCodec wmv1_decoder;
839 extern AVCodec wmv2_decoder;
840 extern AVCodec mpeg_decoder;
841 extern AVCodec h263i_decoder;
842 extern AVCodec rv10_decoder;
843 extern AVCodec svq1_decoder;
844 extern AVCodec dvvideo_decoder;
845 extern AVCodec dvaudio_decoder;
846 extern AVCodec wmav1_decoder;
847 extern AVCodec wmav2_decoder;
848 extern AVCodec mjpeg_decoder;
849 extern AVCodec mp2_decoder;
850 extern AVCodec mp3_decoder;
851 extern AVCodec mace3_decoder;
852 extern AVCodec mace6_decoder;
853 extern AVCodec huffyuv_decoder;
854
855 /* pcm codecs */
856 #define PCM_CODEC(id, name) \
857 extern AVCodec name ## _decoder; \
858 extern AVCodec name ## _encoder
859
860 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
861 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
862 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
863 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
864 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
865 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
866 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
867 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
868
869 /* adpcm codecs */
870
871 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
872 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
873 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
874
875 #undef PCM_CODEC
876
877 /* dummy raw video codec */
878 extern AVCodec rawvideo_codec;
879
880 /* the following codecs use external GPL libs */
881 extern AVCodec ac3_decoder;
882
883 /* resample.c */
884
885 struct ReSampleContext;
886
887 typedef struct ReSampleContext ReSampleContext;
888
889 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
890 int output_rate, int input_rate);
891 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
892 void audio_resample_close(ReSampleContext *s);
893
894 /* YUV420 format is assumed ! */
895
896 struct ImgReSampleContext;
897
898 typedef struct ImgReSampleContext ImgReSampleContext;
899
900 ImgReSampleContext *img_resample_init(int output_width, int output_height,
901 int input_width, int input_height);
902
903 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
904 int iwidth, int iheight,
905 int topBand, int bottomBand,
906 int leftBand, int rightBand);
907
908 void img_resample(ImgReSampleContext *s,
909 AVPicture *output, AVPicture *input);
910
911 void img_resample_close(ImgReSampleContext *s);
912
913 void avpicture_fill(AVPicture *picture, UINT8 *ptr,
914 int pix_fmt, int width, int height);
915 int avpicture_get_size(int pix_fmt, int width, int height);
916
917 /* convert among pixel formats */
918 int img_convert(AVPicture *dst, int dst_pix_fmt,
919 AVPicture *src, int pix_fmt,
920 int width, int height);
921
922 /* deinterlace a picture */
923 int avpicture_deinterlace(AVPicture *dst, AVPicture *src,
924 int pix_fmt, int width, int height);
925
926 /* external high level API */
927
928 extern AVCodec *first_avcodec;
929
930 /* returns LIBAVCODEC_VERSION_INT constant */
931 unsigned avcodec_version(void);
932 /* returns LIBAVCODEC_BUILD constant */
933 unsigned avcodec_build(void);
934 void avcodec_init(void);
935
936 void avcodec_set_bit_exact(void);
937
938 void register_avcodec(AVCodec *format);
939 AVCodec *avcodec_find_encoder(enum CodecID id);
940 AVCodec *avcodec_find_encoder_by_name(const char *name);
941 AVCodec *avcodec_find_decoder(enum CodecID id);
942 AVCodec *avcodec_find_decoder_by_name(const char *name);
943 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
944
945 AVCodecContext *avcodec_alloc_context(void);
946 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
947 int avcodec_decode_audio(AVCodecContext *avctx, INT16 *samples,
948 int *frame_size_ptr,
949 UINT8 *buf, int buf_size);
950 int avcodec_decode_video(AVCodecContext *avctx, AVPicture *picture,
951 int *got_picture_ptr,
952 UINT8 *buf, int buf_size);
953 int avcodec_parse_frame(AVCodecContext *avctx, UINT8 **pdata,
954 int *data_size_ptr,
955 UINT8 *buf, int buf_size);
956 int avcodec_encode_audio(AVCodecContext *avctx, UINT8 *buf, int buf_size,
957 const short *samples);
958 int avcodec_encode_video(AVCodecContext *avctx, UINT8 *buf, int buf_size,
959 const AVPicture *pict);
960
961 int avcodec_close(AVCodecContext *avctx);
962
963 void avcodec_register_all(void);
964
965 void avcodec_flush_buffers(AVCodecContext *avctx);
966
967 /**
968 * Interface for 0.5.0 version
969 *
970 * do not even think about it's usage for this moment
971 */
972
973 typedef struct {
974 // compressed size used from given memory buffer
975 int size;
976 /// I/P/B frame type
977 int frame_type;
978 } avc_enc_result_t;
979
980 /**
981 * Commands
982 * order can't be changed - once it was defined
983 */
984 typedef enum {
985 // general commands
986 AVC_OPEN_BY_NAME = 0xACA000,
987 AVC_OPEN_BY_CODEC_ID,
988 AVC_OPEN_BY_FOURCC,
989 AVC_CLOSE,
990
991 AVC_FLUSH,
992 // pin - struct { uint8_t* src, uint_t src_size }
993 // pout - struct { AVPicture* img, consumed_bytes,
994 AVC_DECODE,
995 // pin - struct { AVPicture* img, uint8_t* dest, uint_t dest_size }
996 // pout - uint_t used_from_dest_size
997 AVC_ENCODE,
998
999 // query/get video commands
1000 AVC_GET_VERSION = 0xACB000,
1001 AVC_GET_WIDTH,
1002 AVC_GET_HEIGHT,
1003 AVC_GET_DELAY,
1004 AVC_GET_QUANT_TABLE,
1005 // ...
1006
1007 // query/get audio commands
1008 AVC_GET_FRAME_SIZE = 0xABC000,
1009
1010 // maybe define some simple structure which
1011 // might be passed to the user - but they can't
1012 // contain any codec specific parts and these
1013 // calls are usualy necessary only few times
1014
1015 // set video commands
1016 AVC_SET_WIDTH = 0xACD000,
1017 AVC_SET_HEIGHT,
1018
1019 // set video encoding commands
1020 AVC_SET_FRAME_RATE = 0xACD800,
1021 AVC_SET_QUALITY,
1022 AVC_SET_HURRY_UP,
1023
1024 // set audio commands
1025 AVC_SET_SAMPLE_RATE = 0xACE000,
1026 AVC_SET_CHANNELS,
1027
1028 } avc_cmd_t;
1029
1030 /**
1031 * \param handle allocated private structure by libavcodec
1032 * for initialization pass NULL - will be returned pout
1033 * user is supposed to know nothing about its structure
1034 * \param cmd type of operation to be performed
1035 * \param pint input parameter
1036 * \param pout output parameter
1037 *
1038 * \returns command status - eventually for query command it might return
1039 * integer resulting value
1040 */
1041 int avcodec(void* handle, avc_cmd_t cmd, void* pin, void* pout);
1042
1043 /* memory */
1044 void *av_malloc(unsigned int size);
1045 void *av_mallocz(unsigned int size);
1046 void av_free(void *ptr);
1047 void __av_freep(void **ptr);
1048 #define av_freep(p) __av_freep((void **)(p))
1049
1050 #endif /* AVCODEC_H */