Statistics
| Branch: | Revision:

ffmpeg / libavcodec / avcodec.h @ 0469baf1

History | View | Annotate | Download (40.4 KB)

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 0x000406
17
#define LIBAVCODEC_VERSION     "0.4.6"
18
#define LIBAVCODEC_BUILD       4666
19
#define LIBAVCODEC_BUILD_STR   "4666"
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_H263,
27
    CODEC_ID_RV10,
28
    CODEC_ID_MP2,
29
    CODEC_ID_MP3LAME,
30
    CODEC_ID_VORBIS,
31
    CODEC_ID_AC3,
32
    CODEC_ID_MJPEG,
33
    CODEC_ID_MJPEGB,
34
    CODEC_ID_MPEG4,
35
    CODEC_ID_RAWVIDEO,
36
    CODEC_ID_MSMPEG4V1,
37
    CODEC_ID_MSMPEG4V2,
38
    CODEC_ID_MSMPEG4V3,
39
    CODEC_ID_WMV1,
40
    CODEC_ID_WMV2,
41
    CODEC_ID_H263P,
42
    CODEC_ID_H263I,
43
    CODEC_ID_SVQ1,
44
    CODEC_ID_DVVIDEO,
45
    CODEC_ID_DVAUDIO,
46
    CODEC_ID_WMAV1,
47
    CODEC_ID_WMAV2,
48
    CODEC_ID_MACE3,
49
    CODEC_ID_MACE6,
50
    CODEC_ID_HUFFYUV,
51
    CODEC_ID_CYUV,
52
    CODEC_ID_H264,
53
    CODEC_ID_INDEO3,
54

    
55
    /* various pcm "codecs" */
56
    CODEC_ID_PCM_S16LE,
57
    CODEC_ID_PCM_S16BE,
58
    CODEC_ID_PCM_U16LE,
59
    CODEC_ID_PCM_U16BE,
60
    CODEC_ID_PCM_S8,
61
    CODEC_ID_PCM_U8,
62
    CODEC_ID_PCM_MULAW,
63
    CODEC_ID_PCM_ALAW,
64

    
65
    /* various adpcm codecs */
66
    CODEC_ID_ADPCM_IMA_QT,
67
    CODEC_ID_ADPCM_IMA_WAV,
68
    CODEC_ID_ADPCM_MS,
69
};
70

    
71
enum CodecType {
72
    CODEC_TYPE_UNKNOWN = -1,
73
    CODEC_TYPE_VIDEO,
74
    CODEC_TYPE_AUDIO,
75
};
76

    
77
/**
78
 * Pixel format.
79
 */
80
enum PixelFormat {
81
    PIX_FMT_YUV420P,
82
    PIX_FMT_YUV422,
83
    PIX_FMT_RGB24,     ///< 3 bytes, R is first 
84
    PIX_FMT_BGR24,     ///< 3 bytes, B is first 
85
    PIX_FMT_YUV422P,
86
    PIX_FMT_YUV444P,
87
    PIX_FMT_RGBA32,    ///< always stored in cpu endianness 
88
    PIX_FMT_YUV410P,
89
    PIX_FMT_YUV411P,
90
    PIX_FMT_RGB565,    ///< always stored in cpu endianness 
91
    PIX_FMT_RGB555,    ///< always stored in cpu endianness, most significant bit to 1 
92
    PIX_FMT_GRAY8,
93
    PIX_FMT_MONOWHITE, ///< 0 is white 
94
    PIX_FMT_MONOBLACK, ///< 0 is black 
95
    PIX_FMT_PAL8,      ///< 8 bit with RGBA palette 
96
    PIX_FMT_YUVJ420P,  ///< YUV full scale (jpeg)
97
    PIX_FMT_YUVJ422P,  ///< YUV full scale (jpeg)
98
    PIX_FMT_YUVJ444P,  ///< YUV full scale (jpeg)
99
    PIX_FMT_NB,
100
};
101

    
102
/* currently unused, may be used if 24/32 bits samples ever supported */
103
enum SampleFormat {
104
    SAMPLE_FMT_S16 = 0,         ///< signed 16 bits 
105
};
106

    
107
/* in bytes */
108
#define AVCODEC_MAX_AUDIO_FRAME_SIZE 131072
109

    
110
/**
111
 * Required number of zero bytes at the end of the input bitstream for decoding.
112
 * to avoid overreading (and possibly segfaulting)
113
 */
114
#define FF_INPUT_BUFFER_PADDING_SIZE 8
115

    
116
/* motion estimation type, EPZS by default */
117
enum Motion_Est_ID {
118
    ME_ZERO = 1,
119
    ME_FULL,
120
    ME_LOG,
121
    ME_PHODS,
122
    ME_EPZS,
123
    ME_X1
124
};
125

    
126
typedef struct RcOverride{
127
    int start_frame;
128
    int end_frame;
129
    int qscale; // if this is 0 then quality_factor will be used instead
130
    float quality_factor;
131
} RcOverride;
132

    
133
/* only for ME compatiblity with old apps */
134
extern int motion_estimation_method;
135

    
136
/* ME algos sorted by quality */
137
static const int Motion_Est_QTab[] = { ME_ZERO, ME_PHODS, ME_LOG, 
138
                                       ME_X1, ME_EPZS, ME_FULL };
139

    
140

    
141
#define FF_MAX_B_FRAMES 8
142

    
143
/* encoding support
144
   these flags can be passed in AVCodecContext.flags before initing 
145
   Note: note not everything is supported yet 
146
*/
147

    
148
#define CODEC_FLAG_HQ     0x0001  ///< brute force MB-type decission mode (slow) 
149
#define CODEC_FLAG_QSCALE 0x0002  ///< use fixed qscale 
150
#define CODEC_FLAG_4MV    0x0004  ///< 4 MV per MB allowed 
151
#define CODEC_FLAG_QPEL   0x0010  ///< use qpel MC 
152
#define CODEC_FLAG_GMC    0x0020  ///< use GMC 
153
#define CODEC_FLAG_PART   0x0080  ///< use data partitioning 
154
/* parent program gurantees that the input for b-frame containing streams is not written to 
155
   for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
156
#define CODEC_FLAG_INPUT_PRESERVED 0x0100
157
#define CODEC_FLAG_PASS1 0x0200   ///< use internal 2pass ratecontrol in first  pass mode 
158
#define CODEC_FLAG_PASS2 0x0400   ///< use internal 2pass ratecontrol in second pass mode 
159
#define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg) 
160
#define CODEC_FLAG_GRAY  0x2000   ///< only decode/encode grayscale 
161
#define CODEC_FLAG_EMU_EDGE 0x4000///< dont draw edges 
162
#define CODEC_FLAG_PSNR           0x8000 ///< error[?] variables will be set during encoding 
163
#define CODEC_FLAG_TRUNCATED  0x00010000 /** input bitstream might be truncated at a random location instead 
164
                                            of only at frame boundaries */
165
#define CODEC_FLAG_NORMALIZE_AQP  0x00020000 ///< normalize adaptive quantization 
166
#define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct 
167
#define CODEC_FLAG_LOW_DELAY      0x00080000 ///< force low delay / will fail on b frames 
168
#define CODEC_FLAG_ALT_SCAN       0x00100000 ///< use alternate scan 
169
#define CODEC_FLAG_TRELLIS_QUANT  0x00200000 ///< use trellis quantization 
170
#define CODEC_FLAG_GLOBAL_HEADER  0x00400000 ///< place global headers in extradata instead of every keyframe 
171
#define CODEC_FLAG_BITEXACT       0x00800000 ///< use only bitexact stuff (except (i)dct) 
172
/* Fx : Flag for h263+ extra options */
173
#define CODEC_FLAG_H263P_AIC      0x01000000 ///< Advanced intra coding 
174
#define CODEC_FLAG_H263P_UMV      0x02000000 ///< Unlimited motion vector  
175
/* For advanced prediction mode, we reuse the 4MV flag */
176
/* Unsupported options :
177
 *                 Syntax Arithmetic coding (SAC)
178
 *                 Deblocking filter internal loop
179
 *                 Slice structured
180
 *                 Reference Picture Selection
181
 *                 Independant Segment Decoding
182
 *                 Alternative Inter *                 VLC
183
 *                 Modified Quantization */
184
/* /Fx */
185
/* codec capabilities */
186

    
187
#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback 
188
/**
189
 * Codec uses get_buffer() for allocating buffers.
190
 * direct rendering method 1
191
 */
192
#define CODEC_CAP_DR1             0x0002
193
/* if 'parse_only' field is true, then avcodec_parse_frame() can be
194
   used */
195
#define CODEC_CAP_PARSE_ONLY      0x0004
196
#define CODEC_CAP_TRUNCATED       0x0008
197

    
198
#define FF_COMMON_FRAME \
199
    /**\
200
     * pointer to the picture planes.\
201
     * this might be different from the first allocated byte\
202
     * - encoding: \
203
     * - decoding: \
204
     */\
205
    uint8_t *data[4];\
206
    int linesize[4];\
207
    /**\
208
     * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
209
     * this isnt used by lavc unless the default get/release_buffer() is used\
210
     * - encoding: \
211
     * - decoding: \
212
     */\
213
    uint8_t *base[4];\
214
    /**\
215
     * 1 -> keyframe, 0-> not\
216
     * - encoding: set by lavc\
217
     * - decoding: set by lavc\
218
     */\
219
    int key_frame;\
220
\
221
    /**\
222
     * picture type of the frame, see ?_TYPE below.\
223
     * - encoding: set by lavc for coded_picture (and set by user for input)\
224
     * - decoding: set by lavc\
225
     */\
226
    int pict_type;\
227
\
228
    /**\
229
     * presentation timestamp in micro seconds (time when frame should be shown to user)\
230
     * if 0 then the frame_rate will be used as reference\
231
     * - encoding: MUST be set by user\
232
     * - decoding: set by lavc\
233
     */\
234
    int64_t pts;\
235
\
236
    /**\
237
     * picture number in bitstream order.\
238
     * - encoding: set by\
239
     * - decoding: set by lavc\
240
     */\
241
    int coded_picture_number;\
242
    /**\
243
     * picture number in display order.\
244
     * - encoding: set by\
245
     * - decoding: set by lavc\
246
     */\
247
    int display_picture_number;\
248
\
249
    /**\
250
     * quality (between 1 (good) and 31 (bad)) \
251
     * - encoding: set by lavc for coded_picture (and set by user for input)\
252
     * - decoding: set by lavc\
253
     */\
254
    float quality; \
255
\
256
    /**\
257
     * buffer age (1->was last buffer and dint change, 2->..., ...).\
258
     * set to something large if the buffer has not been used yet \
259
     * - encoding: unused\
260
     * - decoding: MUST be set by get_buffer()\
261
     */\
262
    int age;\
263
\
264
    /**\
265
     * is this picture used as reference\
266
     * - encoding: unused\
267
     * - decoding: set by lavc (before get_buffer() call))\
268
     */\
269
    int reference;\
270
\
271
    /**\
272
     * QP table\
273
     * - encoding: unused\
274
     * - decoding: set by lavc\
275
     */\
276
    int8_t *qscale_table;\
277
    /**\
278
     * QP store stride\
279
     * - encoding: unused\
280
     * - decoding: set by lavc\
281
     */\
282
    int qstride;\
283
\
284
    /**\
285
     * mbskip_table[mb]>=1 if MB didnt change\
286
     * stride= mb_width = (width+15)>>4\
287
     * - encoding: unused\
288
     * - decoding: set by lavc\
289
     */\
290
    uint8_t *mbskip_table;\
291
\
292
    /**\
293
     * for some private data of the user\
294
     * - encoding: unused\
295
     * - decoding: set by user\
296
     */\
297
    void *opaque;\
298
\
299
    /**\
300
     * error\
301
     * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
302
     * - decoding: unused\
303
     */\
304
    uint64_t error[4];\
305
\
306
    /**\
307
     * type of the buffer (to keep track of who has to dealloc data[*])\
308
     * - encoding: set by the one who allocs it\
309
     * - decoding: set by the one who allocs it\
310
     * Note: user allocated (direct rendering) & internal buffers can not coexist currently\ 
311
     */\
312
    int type;\
313
    \
314
    /**\
315
     * when decoding, this signal how much the picture must be delayed.\
316
     * extra_delay = repeat_pict / (2*fps)\
317
     * - encoding: unused\
318
     * - decoding: set by lavc\
319
     */\
320
    int repeat_pict;\
321
    \
322
    /**\
323
     * \
324
     */\
325
    int qscale_type;\
326

    
327
#define FF_QSCALE_TYPE_MPEG1        0
328
#define FF_QSCALE_TYPE_MPEG2        1
329

    
330
#define FF_BUFFER_TYPE_INTERNAL 1
331
#define FF_BUFFER_TYPE_USER     2 ///< Direct rendering buffers
332
#define FF_BUFFER_TYPE_SHARED   4 ///< buffer from somewher else, dont dealloc
333

    
334

    
335
#define FF_I_TYPE 1 // Intra
336
#define FF_P_TYPE 2 // Predicted
337
#define FF_B_TYPE 3 // Bi-dir predicted
338
#define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
339
#define FF_SI_TYPE 5
340
#define FF_SP_TYPE 6
341

    
342
/**
343
 * Audio Video Frame.
344
 */
345
typedef struct AVFrame {
346
    FF_COMMON_FRAME
347
} AVFrame;
348

    
349
#define DEFAULT_FRAME_RATE_BASE 1001000
350

    
351
/**
352
 * main external api structure.
353
 */
354
typedef struct AVCodecContext {
355
    /**
356
     * the average bitrate.
357
     * - encoding: set by user. unused for constant quantizer encoding
358
     * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream 
359
     */
360
    int bit_rate;
361

    
362
    /**
363
     * number of bits the bitstream is allowed to diverge from the reference.
364
     *           the reference can be CBR (for CBR pass1) or VBR (for pass2)
365
     * - encoding: set by user. unused for constant quantizer encoding
366
     * - decoding: unused
367
     */
368
    int bit_rate_tolerance; 
369

    
370
    /**
371
     * CODEC_FLAG_*.
372
     * - encoding: set by user.
373
     * - decoding: set by user.
374
     */
375
    int flags;
376

    
377
    /**
378
     * some codecs needs additionnal format info. It is stored here
379
     * - encoding: set by user. 
380
     * - decoding: set by lavc. (FIXME is this ok?)
381
     */
382
    int sub_id;
383

    
384
    /**
385
     * motion estimation algorithm used for video coding.
386
     * - encoding: MUST be set by user.
387
     * - decoding: unused
388
     */
389
    int me_method;
390

    
391
    /**
392
     * some codecs need / can use extra-data like huffman tables.
393
     * mjpeg: huffman tables
394
     * rv10: additional flags
395
     * mpeg4: global headers (they can be in the bitstream or here)
396
     * - encoding: set/allocated/freed by lavc.
397
     * - decoding: set/allocated/freed by user.
398
     */
399
    void *extradata;
400
    int extradata_size;
401
    
402
    /* video only */
403
    /**
404
     * frames per sec multiplied by frame_rate_base.
405
     * for variable fps this is the precission, so if the timestamps 
406
     * can be specified in msec precssion then this is 1000*frame_rate_base
407
     * - encoding: MUST be set by user
408
     * - decoding: set by lavc. 0 or the frame_rate if available
409
     */
410
    int frame_rate;
411
    
412
    /**
413
     * width / height.
414
     * - encoding: MUST be set by user. 
415
     * - decoding: set by user, some codecs might override / change it during playback
416
     */
417
    int width, height;
418
    
419
#define FF_ASPECT_SQUARE 1
420
#define FF_ASPECT_4_3_625 2
421
#define FF_ASPECT_4_3_525 3
422
#define FF_ASPECT_16_9_625 4
423
#define FF_ASPECT_16_9_525 5
424
#define FF_ASPECT_EXTENDED 15
425

    
426
    /**
427
     * the number of pictures in a group of pitures, or 0 for intra_only.
428
     * - encoding: set by user.
429
     * - decoding: unused
430
     */
431
    int gop_size;
432

    
433
    /**
434
     * pixel format, see PIX_FMT_xxx.
435
     * - encoding: unused
436
     * - decoding: set by lavc.
437
     */
438
    enum PixelFormat pix_fmt;
439
 
440
    /**
441
     * Frame rate emulation. If not zero lower layer (i.e. format handler) 
442
     * has to read frames at native frame rate.
443
     * - encoding: set by user.
444
     * - decoding: unused.
445
     */
446
    int rate_emu;
447
       
448
    /**
449
     * if non NULL, 'draw_horiz_band' is called by the libavcodec
450
     * decoder to draw an horizontal band. It improve cache usage. Not
451
     * all codecs can do that. You must check the codec capabilities
452
     * before
453
     * - encoding: unused
454
     * - decoding: set by user.
455
     */
456
    void (*draw_horiz_band)(struct AVCodecContext *s,
457
                            uint8_t **src_ptr, int linesize,
458
                            int y, int width, int height);
459

    
460
    /* audio only */
461
    int sample_rate; ///< samples per sec 
462
    int channels;
463
    int sample_fmt;  ///< sample format, currenly unused 
464

    
465
    /* the following data should not be initialized */
466
    int frame_size;     ///< in samples, initialized when calling 'init' 
467
    int frame_number;   ///< audio or video frame number 
468
    int real_pict_num;  ///< returns the real picture number of previous encoded frame 
469
    
470
    /**
471
     * number of frames the decoded output will be delayed relative to 
472
     * the encoded input.
473
     * - encoding: set by lavc.
474
     * - decoding: unused
475
     */
476
    int delay;
477
    
478
    /* - encoding parameters */
479
    float qcompress;  ///< amount of qscale change between easy & hard scenes (0.0-1.0)
480
    float qblur;      ///< amount of qscale smoothing over time (0.0-1.0) 
481
    
482
    /**
483
     * minimum quantizer.
484
     * - encoding: set by user.
485
     * - decoding: unused
486
     */
487
    int qmin;
488

    
489
    /**
490
     * maximum quantizer.
491
     * - encoding: set by user.
492
     * - decoding: unused
493
     */
494
    int qmax;
495

    
496
    /**
497
     * maximum quantizer difference etween frames.
498
     * - encoding: set by user.
499
     * - decoding: unused
500
     */
501
    int max_qdiff;
502

    
503
    /**
504
     * maximum number of b frames between non b frames.
505
     * note: the output will be delayed by max_b_frames+1 relative to the input
506
     * - encoding: set by user.
507
     * - decoding: unused
508
     */
509
    int max_b_frames;
510

    
511
    /**
512
     * qscale factor between ip and b frames.
513
     * - encoding: set by user.
514
     * - decoding: unused
515
     */
516
    float b_quant_factor;
517
    
518
    /** obsolete FIXME remove */
519
    int rc_strategy;
520
    int b_frame_strategy;
521

    
522
    /**
523
     * hurry up amount.
524
     * - encoding: unused
525
     * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
526
     */
527
    int hurry_up;
528
    
529
    struct AVCodec *codec;
530
    
531
    void *priv_data;
532

    
533
    /* The following data is for RTP friendly coding */
534
    /* By now only H.263/H.263+/MPEG4 coder honours this   */
535
    int rtp_mode;   /* 1 for activate RTP friendly-mode           */
536
                    /* highers numbers represent more error-prone */
537
                    /* enviroments, by now just "1" exist         */
538
    
539
    int rtp_payload_size;   /* The size of the RTP payload, the coder will  */
540
                            /* do it's best to deliver a chunk with size    */
541
                            /* below rtp_payload_size, the chunk will start */
542
                            /* with a start code on some codecs like H.263  */
543
                            /* This doesn't take account of any particular  */
544
                            /* headers inside the transmited RTP payload    */
545

    
546
    
547
    /* The RTP callcack: This function is called  */
548
    /* every time the encoder as a packet to send */
549
    /* Depends on the encoder if the data starts  */
550
    /* with a Start Code (it should) H.263 does   */
551
    void (*rtp_callback)(void *data, int size, int packet_number); 
552

    
553
    /* statistics, used for 2-pass encoding */
554
    int mv_bits;
555
    int header_bits;
556
    int i_tex_bits;
557
    int p_tex_bits;
558
    int i_count;
559
    int p_count;
560
    int skip_count;
561
    int misc_bits;
562
    
563
    /**
564
     * number of bits used for the previously encoded frame.
565
     * - encoding: set by lavc
566
     * - decoding: unused
567
     */
568
    int frame_bits;
569

    
570
    /**
571
     * private data of the user, can be used to carry app specific stuff.
572
     * - encoding: set by user
573
     * - decoding: set by user
574
     */
575
    void *opaque;
576

    
577
    char codec_name[32];
578
    enum CodecType codec_type; /* see CODEC_TYPE_xxx */
579
    enum CodecID codec_id; /* see CODEC_ID_xxx */
580
    
581
    /**
582
     * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
583
     * this is used to workaround some encoder bugs
584
     * - encoding: unused
585
     * - decoding: set by user, will be converted to upper case by lavc during init
586
     */
587
    unsigned int codec_tag;
588
    
589
    /**
590
     * workaround bugs in encoders which sometimes cannot be detected automatically.
591
     * - encoding: unused
592
     * - decoding: set by user
593
     */
594
    int workaround_bugs;
595
#define FF_BUG_AUTODETECT       1  ///< autodetection
596
#define FF_BUG_OLD_MSMPEG4      2
597
#define FF_BUG_XVID_ILACE       4
598
#define FF_BUG_UMP4             8
599
#define FF_BUG_NO_PADDING       16
600
#define FF_BUG_AC_VLC           32
601
#define FF_BUG_QPEL_CHROMA      64
602
#define FF_BUG_STD_QPEL         128
603
#define FF_BUG_QPEL_CHROMA2     256
604
#define FF_BUG_DIRECT_BLOCKSIZE 512
605
#define FF_BUG_EDGE             1024
606
//#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
607
        
608
    /**
609
     * luma single coeff elimination threshold.
610
     * - encoding: set by user
611
     * - decoding: unused
612
     */
613
    int luma_elim_threshold;
614
    
615
    /**
616
     * chroma single coeff elimination threshold.
617
     * - encoding: set by user
618
     * - decoding: unused
619
     */
620
    int chroma_elim_threshold;
621
    
622
    /**
623
     * strictly follow the std (MPEG4, ...).
624
     * - encoding: set by user
625
     * - decoding: unused
626
     */
627
    int strict_std_compliance;
628
    
629
    /**
630
     * qscale offset between ip and b frames.
631
     * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
632
     * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
633
     * - encoding: set by user.
634
     * - decoding: unused
635
     */
636
    float b_quant_offset;
637
    
638
    /**
639
     * error resilience higher values will detect more errors but may missdetect
640
     * some more or less valid parts as errors.
641
     * - encoding: unused
642
     * - decoding: set by user
643
     */
644
    int error_resilience;
645
#define FF_ER_CAREFULL        1
646
#define FF_ER_COMPLIANT       2
647
#define FF_ER_AGGRESSIVE      3
648
#define FF_ER_VERY_AGGRESSIVE 4
649
    
650
    /**
651
     * called at the beginning of each frame to get a buffer for it.
652
     * if pic.reference is set then the frame will be read later by lavc
653
     * - encoding: unused
654
     * - decoding: set by lavc, user can override
655
     */
656
    int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
657
    
658
    /**
659
     * called to release buffers which where allocated with get_buffer.
660
     * a released buffer can be reused in get_buffer()
661
     * pic.data[*] must be set to NULL
662
     * - encoding: unused
663
     * - decoding: set by lavc, user can override
664
     */
665
    void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
666

    
667
    /**
668
     * is 1 if the decoded stream contains b frames, 0 otherwise.
669
     * - encoding: unused
670
     * - decoding: set by lavc
671
     */
672
    int has_b_frames;
673
    
674
    int block_align; ///< used by some WAV based audio codecs
675
    
676
    int parse_only; /* - decoding only: if true, only parsing is done
677
                       (function avcodec_parse_frame()). The frame
678
                       data is returned. Only MPEG codecs support this now. */
679
    
680
    /**
681
     * 0-> h263 quant 1-> mpeg quant.
682
     * - encoding: set by user.
683
     * - decoding: unused
684
     */
685
    int mpeg_quant;
686
    
687
    /**
688
     * pass1 encoding statistics output buffer.
689
     * - encoding: set by lavc
690
     * - decoding: unused
691
     */
692
    char *stats_out;
693
    
694
    /**
695
     * pass2 encoding statistics input buffer.
696
     * concatenated stuff from stats_out of pass1 should be placed here
697
     * - encoding: allocated/set/freed by user
698
     * - decoding: unused
699
     */
700
    char *stats_in;
701
    
702
    /**
703
     * ratecontrol qmin qmax limiting method.
704
     * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
705
     * - encoding: set by user.
706
     * - decoding: unused
707
     */
708
    float rc_qsquish;
709

    
710
    float rc_qmod_amp;
711
    int rc_qmod_freq;
712
    
713
    /**
714
     * ratecontrol override, see RcOverride.
715
     * - encoding: allocated/set/freed by user.
716
     * - decoding: unused
717
     */
718
    RcOverride *rc_override;
719
    int rc_override_count;
720
    
721
    /**
722
     * rate control equation.
723
     * - encoding: set by user
724
     * - decoding: unused
725
     */
726
    char *rc_eq;
727
    
728
    /**
729
     * maximum bitrate.
730
     * - encoding: set by user.
731
     * - decoding: unused
732
     */
733
    int rc_max_rate;
734
    
735
    /**
736
     * minimum bitrate.
737
     * - encoding: set by user.
738
     * - decoding: unused
739
     */
740
    int rc_min_rate;
741
    
742
    /**
743
     * decoder bitstream buffer size.
744
     * - encoding: set by user.
745
     * - decoding: unused
746
     */
747
    int rc_buffer_size;
748
    float rc_buffer_aggressivity;
749

    
750
    /**
751
     * qscale factor between p and i frames.
752
     * - encoding: set by user.
753
     * - decoding: unused
754
     */
755
    float i_quant_factor;
756
    
757
    /**
758
     * qscale offset between p and i frames.
759
     * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
760
     * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
761
     * - encoding: set by user.
762
     * - decoding: unused
763
     */
764
    float i_quant_offset;
765
    
766
    /**
767
     * initial complexity for pass1 ratecontrol.
768
     * - encoding: set by user.
769
     * - decoding: unused
770
     */
771
    float rc_initial_cplx;
772

    
773
    /**
774
     * dct algorithm, see FF_DCT_* below.
775
     * - encoding: set by user
776
     * - decoding: unused
777
     */
778
    int dct_algo;
779
#define FF_DCT_AUTO    0
780
#define FF_DCT_FASTINT 1
781
#define FF_DCT_INT     2
782
#define FF_DCT_MMX     3
783
#define FF_DCT_MLIB    4
784
#define FF_DCT_ALTIVEC 5
785
    
786
    /**
787
     * luminance masking (0-> disabled).
788
     * - encoding: set by user
789
     * - decoding: unused
790
     */
791
    float lumi_masking;
792
    
793
    /**
794
     * temporary complexity masking (0-> disabled).
795
     * - encoding: set by user
796
     * - decoding: unused
797
     */
798
    float temporal_cplx_masking;
799
    
800
    /**
801
     * spatial complexity masking (0-> disabled).
802
     * - encoding: set by user
803
     * - decoding: unused
804
     */
805
    float spatial_cplx_masking;
806
    
807
    /**
808
     * p block masking (0-> disabled).
809
     * - encoding: set by user
810
     * - decoding: unused
811
     */
812
    float p_masking;
813

    
814
    /**
815
     * darkness masking (0-> disabled).
816
     * - encoding: set by user
817
     * - decoding: unused
818
     */
819
    float dark_masking;
820
    
821
    
822
    /* for binary compatibility */
823
    int unused;
824
    
825
    /**
826
     * idct algorithm, see FF_IDCT_* below.
827
     * - encoding: set by user
828
     * - decoding: set by user
829
     */
830
    int idct_algo;
831
#define FF_IDCT_AUTO         0
832
#define FF_IDCT_INT          1
833
#define FF_IDCT_SIMPLE       2
834
#define FF_IDCT_SIMPLEMMX    3
835
#define FF_IDCT_LIBMPEG2MMX  4
836
#define FF_IDCT_PS2          5
837
#define FF_IDCT_MLIB         6
838
#define FF_IDCT_ARM          7
839
#define FF_IDCT_ALTIVEC      8
840

    
841
    /**
842
     * slice count.
843
     * - encoding: set by lavc
844
     * - decoding: set by user (or 0)
845
     */
846
    int slice_count;
847
    /**
848
     * slice offsets in the frame in bytes.
849
     * - encoding: set/allocated by lavc
850
     * - decoding: set/allocated by user (or NULL)
851
     */
852
    int *slice_offset;
853

    
854
    /**
855
     * error concealment flags.
856
     * - encoding: unused
857
     * - decoding: set by user
858
     */
859
    int error_concealment;
860
#define FF_EC_GUESS_MVS   1
861
#define FF_EC_DEBLOCK     2
862

    
863
    /**
864
     * dsp_mask could be add used to disable unwanted CPU features
865
     * CPU features (i.e. MMX, SSE. ...)
866
     *
867
     * with FORCE flag you may instead enable given CPU features
868
     * (Dangerous: usable in case of misdetection, improper usage however will
869
     * result into program crash)
870
     */
871
    unsigned dsp_mask;
872
#define FF_MM_FORCE        0x80000000 /* force usage of selected flags (OR) */
873
    /* lower 16 bits - CPU features */
874
#ifdef HAVE_MMX
875
#define FF_MM_MMX        0x0001 /* standard MMX */
876
#define FF_MM_3DNOW        0x0004 /* AMD 3DNOW */
877
#define FF_MM_MMXEXT        0x0002 /* SSE integer functions or AMD MMX ext */
878
#define FF_MM_SSE        0x0008 /* SSE functions */
879
#define FF_MM_SSE2        0x0010 /* PIV SSE2 functions */
880
#endif /* HAVE_MMX */
881

    
882
    /**
883
     * bits per sample/pixel from the demuxer (needed for huffyuv).
884
     * - encoding: set by lavc
885
     * - decoding: set by user
886
     */
887
     int bits_per_sample;
888
    
889
    /**
890
     * prediction method (needed for huffyuv).
891
     * - encoding: set by user
892
     * - decoding: unused
893
     */
894
     int prediction_method;
895
#define FF_PRED_LEFT   0
896
#define FF_PRED_PLANE  1
897
#define FF_PRED_MEDIAN 2
898
    
899
    /**
900
     * aspect ratio (0 if unknown).
901
     * - encoding: set by user.
902
     * - decoding: set by lavc.
903
     */
904
    float aspect_ratio;
905

    
906
    /**
907
     * the picture in the bitstream.
908
     * - encoding: set by lavc
909
     * - decoding: set by lavc
910
     */
911
    AVFrame *coded_frame;
912

    
913
    /**
914
     * debug.
915
     * - encoding: set by user.
916
     * - decoding: set by user.
917
     */
918
    int debug;
919
#define FF_DEBUG_PICT_INFO 1
920
#define FF_DEBUG_RC        2
921
#define FF_DEBUG_BITSTREAM 4
922
#define FF_DEBUG_MB_TYPE   8
923
#define FF_DEBUG_QP        16
924
#define FF_DEBUG_MV        32
925
#define FF_DEBUG_VIS_MV    0x00000040
926
#define FF_DEBUG_SKIP      0x00000080
927
#define FF_DEBUG_STARTCODE 0x00000100
928
#define FF_DEBUG_PTS       0x00000200
929
#define FF_DEBUG_ER        0x00000400
930
#define FF_DEBUG_MMCO      0x00000800
931
    
932
    /**
933
     * error.
934
     * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
935
     * - decoding: unused
936
     */
937
    uint64_t error[4];
938
    
939
    /**
940
     * minimum MB quantizer.
941
     * - encoding: set by user.
942
     * - decoding: unused
943
     */
944
    int mb_qmin;
945

    
946
    /**
947
     * maximum MB quantizer.
948
     * - encoding: set by user.
949
     * - decoding: unused
950
     */
951
    int mb_qmax;
952
    
953
    /**
954
     * motion estimation compare function.
955
     * - encoding: set by user.
956
     * - decoding: unused
957
     */
958
    int me_cmp;
959
    /**
960
     * subpixel motion estimation compare function.
961
     * - encoding: set by user.
962
     * - decoding: unused
963
     */
964
    int me_sub_cmp;
965
    /**
966
     * macroblock compare function (not supported yet).
967
     * - encoding: set by user.
968
     * - decoding: unused
969
     */
970
    int mb_cmp;
971
#define FF_CMP_SAD  0
972
#define FF_CMP_SSE  1
973
#define FF_CMP_SATD 2
974
#define FF_CMP_DCT  3
975
#define FF_CMP_PSNR 4
976
#define FF_CMP_BIT  5
977
#define FF_CMP_RD   6
978
#define FF_CMP_ZERO 7
979
#define FF_CMP_CHROMA 256
980
    
981
    /**
982
     * ME diamond size & shape.
983
     * - encoding: set by user.
984
     * - decoding: unused
985
     */
986
    int dia_size;
987

    
988
    /**
989
     * amount of previous MV predictors (2a+1 x 2a+1 square).
990
     * - encoding: set by user.
991
     * - decoding: unused
992
     */
993
    int last_predictor_count;
994

    
995
    /**
996
     * pre pass for motion estimation.
997
     * - encoding: set by user.
998
     * - decoding: unused
999
     */
1000
    int pre_me;
1001

    
1002
    /**
1003
     * motion estimation pre pass compare function.
1004
     * - encoding: set by user.
1005
     * - decoding: unused
1006
     */
1007
    int me_pre_cmp;
1008

    
1009
    /**
1010
     * ME pre pass diamond size & shape.
1011
     * - encoding: set by user.
1012
     * - decoding: unused
1013
     */
1014
    int pre_dia_size;
1015

    
1016
    /**
1017
     * subpel ME quality.
1018
     * - encoding: set by user.
1019
     * - decoding: unused
1020
     */
1021
    int me_subpel_quality;
1022

    
1023
    /**
1024
     * callback to negotiate the pixelFormat.
1025
     * @param fmt is the list of formats which are supported by the codec,
1026
     * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1027
     * the first is allways the native one
1028
     * @return the choosen format
1029
     * - encoding: unused
1030
     * - decoding: set by user, if not set then the native format will always be choosen
1031
     */
1032
    enum PixelFormat (*get_format)(struct AVCodecContext *s, enum PixelFormat * fmt);
1033

    
1034
    /**
1035
     * DTG active format information (additionnal aspect ratio
1036
     * information only used in DVB MPEG2 transport streams). 0 if
1037
     * not set.
1038
     * 
1039
     * - encoding: unused.
1040
     * - decoding: set by decoder 
1041
     */
1042
    int dtg_active_format;
1043
#define FF_DTG_AFD_SAME         8
1044
#define FF_DTG_AFD_4_3          9
1045
#define FF_DTG_AFD_16_9         10
1046
#define FF_DTG_AFD_14_9         11
1047
#define FF_DTG_AFD_4_3_SP_14_9  13
1048
#define FF_DTG_AFD_16_9_SP_14_9 14
1049
#define FF_DTG_AFD_SP_4_3       15
1050

    
1051
    /**
1052
     * Maximum motion estimation search range in subpel units.
1053
     * if 0 then no limit
1054
     * 
1055
     * - encoding: set by user.
1056
     * - decoding: unused.
1057
     */
1058
    int me_range;
1059

    
1060
    /**
1061
     * frame_rate_base.
1062
     * for variable fps this is 1
1063
     * - encoding: set by user.
1064
     * - decoding: set by lavc.
1065
     * @todo move this after frame_rate
1066
     */
1067

    
1068
    int frame_rate_base;
1069
    /**
1070
     * intra quantizer bias.
1071
     * - encoding: set by user.
1072
     * - decoding: unused
1073
     */
1074
    int intra_quant_bias;
1075
#define FF_DEFAULT_QUANT_BIAS 999999
1076
    
1077
    /**
1078
     * inter quantizer bias.
1079
     * - encoding: set by user.
1080
     * - decoding: unused
1081
     */
1082
    int inter_quant_bias;
1083
    
1084
} AVCodecContext;
1085

    
1086

    
1087
/**
1088
 * AVOption.
1089
 */
1090
typedef struct AVOption {
1091
    /** options' name */
1092
    const char *name; /* if name is NULL, it indicates a link to next */
1093
    /** short English text help or const struct AVOption* subpointer */
1094
    const char *help; //        const struct AVOption* sub;
1095
    /** offset to context structure where the parsed value should be stored */
1096
    int offset;
1097
    /** options' type */
1098
    int type;
1099
#define FF_OPT_TYPE_BOOL 1      ///< boolean - true,1,on  (or simply presence)
1100
#define FF_OPT_TYPE_DOUBLE 2    ///< double
1101
#define FF_OPT_TYPE_INT 3       ///< integer
1102
#define FF_OPT_TYPE_STRING 4    ///< string (finished with \0)
1103
#define FF_OPT_TYPE_MASK 0x1f        ///< mask for types - upper bits are various flags
1104
//#define FF_OPT_TYPE_EXPERT 0x20 // flag for expert option
1105
#define FF_OPT_TYPE_FLAG (FF_OPT_TYPE_BOOL | 0x40)
1106
#define FF_OPT_TYPE_RCOVERRIDE (FF_OPT_TYPE_STRING | 0x80)
1107
    /** min value  (min == max   ->  no limits) */
1108
    double min;
1109
    /** maximum value for double/int */
1110
    double max;
1111
    /** default boo [0,1]l/double/int value */
1112
    double defval;
1113
    /**
1114
     * default string value (with optional semicolon delimited extra option-list
1115
     * i.e.   option1;option2;option3
1116
     * defval might select other then first argument as default
1117
     */
1118
    const char *defstr;
1119
#define FF_OPT_MAX_DEPTH 10
1120
} AVOption;
1121

    
1122
/**
1123
 * Parse option(s) and sets fields in passed structure
1124
 * @param strct        structure where the parsed results will be written
1125
 * @param list  list with AVOptions
1126
 * @param opts        string with options for parsing
1127
 */
1128
int avoption_parse(void* strct, const AVOption* list, const char* opts);
1129

    
1130

    
1131
/**
1132
 * AVCodec.
1133
 */
1134
typedef struct AVCodec {
1135
    const char *name;
1136
    int type;
1137
    int id;
1138
    int priv_data_size;
1139
    int (*init)(AVCodecContext *);
1140
    int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
1141
    int (*close)(AVCodecContext *);
1142
    int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
1143
                  uint8_t *buf, int buf_size);
1144
    int capabilities;
1145
    const AVOption *options;
1146
    struct AVCodec *next;
1147
} AVCodec;
1148

    
1149
/**
1150
 * four components are given, that's all.
1151
 * the last component is alpha
1152
 */
1153
typedef struct AVPicture {
1154
    uint8_t *data[4];
1155
    int linesize[4];
1156
} AVPicture;
1157

    
1158
extern AVCodec ac3_encoder;
1159
extern AVCodec mp2_encoder;
1160
extern AVCodec mp3lame_encoder;
1161
extern AVCodec oggvorbis_encoder;
1162
extern AVCodec mpeg1video_encoder;
1163
extern AVCodec h263_encoder;
1164
extern AVCodec h263p_encoder;
1165
extern AVCodec rv10_encoder;
1166
extern AVCodec mjpeg_encoder;
1167
extern AVCodec mpeg4_encoder;
1168
extern AVCodec msmpeg4v1_encoder;
1169
extern AVCodec msmpeg4v2_encoder;
1170
extern AVCodec msmpeg4v3_encoder;
1171
extern AVCodec wmv1_encoder;
1172
extern AVCodec wmv2_encoder;
1173
extern AVCodec huffyuv_encoder;
1174
extern AVCodec h264_encoder;
1175

    
1176
extern AVCodec h263_decoder;
1177
extern AVCodec mpeg4_decoder;
1178
extern AVCodec msmpeg4v1_decoder;
1179
extern AVCodec msmpeg4v2_decoder;
1180
extern AVCodec msmpeg4v3_decoder;
1181
extern AVCodec wmv1_decoder;
1182
extern AVCodec wmv2_decoder;
1183
extern AVCodec mpeg_decoder;
1184
extern AVCodec h263i_decoder;
1185
extern AVCodec rv10_decoder;
1186
extern AVCodec svq1_decoder;
1187
extern AVCodec dvvideo_decoder;
1188
extern AVCodec dvaudio_decoder;
1189
extern AVCodec wmav1_decoder;
1190
extern AVCodec wmav2_decoder;
1191
extern AVCodec mjpeg_decoder;
1192
extern AVCodec mjpegb_decoder;
1193
extern AVCodec mp2_decoder;
1194
extern AVCodec mp3_decoder;
1195
extern AVCodec mace3_decoder;
1196
extern AVCodec mace6_decoder;
1197
extern AVCodec huffyuv_decoder;
1198
extern AVCodec oggvorbis_decoder;
1199
extern AVCodec cyuv_decoder;
1200
extern AVCodec h264_decoder;
1201
extern AVCodec indeo3_decoder;
1202

    
1203
/* pcm codecs */
1204
#define PCM_CODEC(id, name) \
1205
extern AVCodec name ## _decoder; \
1206
extern AVCodec name ## _encoder
1207

    
1208
PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
1209
PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
1210
PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
1211
PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
1212
PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
1213
PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
1214
PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
1215
PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
1216

    
1217
/* adpcm codecs */
1218

    
1219
PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
1220
PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
1221
PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
1222

    
1223
#undef PCM_CODEC
1224

    
1225
/* dummy raw video codec */
1226
extern AVCodec rawvideo_codec;
1227

    
1228
/* the following codecs use external GPL libs */
1229
extern AVCodec ac3_decoder;
1230

    
1231
/* resample.c */
1232

    
1233
struct ReSampleContext;
1234

    
1235
typedef struct ReSampleContext ReSampleContext;
1236

    
1237
ReSampleContext *audio_resample_init(int output_channels, int input_channels, 
1238
                                     int output_rate, int input_rate);
1239
int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
1240
void audio_resample_close(ReSampleContext *s);
1241

    
1242
/* YUV420 format is assumed ! */
1243

    
1244
struct ImgReSampleContext;
1245

    
1246
typedef struct ImgReSampleContext ImgReSampleContext;
1247

    
1248
ImgReSampleContext *img_resample_init(int output_width, int output_height,
1249
                                      int input_width, int input_height);
1250

    
1251
ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
1252
                                      int iwidth, int iheight,
1253
                                      int topBand, int bottomBand,
1254
                                      int leftBand, int rightBand);
1255

    
1256
void img_resample(ImgReSampleContext *s, 
1257
                  AVPicture *output, AVPicture *input);
1258

    
1259
void img_resample_close(ImgReSampleContext *s);
1260

    
1261
int avpicture_fill(AVPicture *picture, uint8_t *ptr,
1262
                   int pix_fmt, int width, int height);
1263
int avpicture_get_size(int pix_fmt, int width, int height);
1264
void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
1265
const char *avcodec_get_pix_fmt_name(int pix_fmt);
1266

    
1267
#define FF_LOSS_RESOLUTION  0x0001 /* loss due to resolution change */
1268
#define FF_LOSS_DEPTH       0x0002 /* loss due to color depth change */
1269
#define FF_LOSS_COLORSPACE  0x0004 /* loss due to color space conversion */
1270
#define FF_LOSS_ALPHA       0x0008 /* loss of alpha bits */
1271
#define FF_LOSS_COLORQUANT  0x0010 /* loss due to color quantization */
1272
#define FF_LOSS_CHROMA      0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
1273

    
1274
int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
1275
                             int has_alpha);
1276
int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
1277
                              int has_alpha, int *loss_ptr);
1278

    
1279
#define FF_ALPHA_TRANSP       0x0001 /* image has some totally transparent pixels */
1280
#define FF_ALPHA_SEMI_TRANSP  0x0002 /* image has some transparent pixels */
1281
int img_get_alpha_info(AVPicture *src, int pix_fmt, int width, int height);
1282

    
1283
/* convert among pixel formats */
1284
int img_convert(AVPicture *dst, int dst_pix_fmt,
1285
                AVPicture *src, int pix_fmt, 
1286
                int width, int height);
1287

    
1288
/* deinterlace a picture */
1289
int avpicture_deinterlace(AVPicture *dst, AVPicture *src,
1290
                          int pix_fmt, int width, int height);
1291

    
1292
/* external high level API */
1293

    
1294
extern AVCodec *first_avcodec;
1295

    
1296
/* returns LIBAVCODEC_VERSION_INT constant */
1297
unsigned avcodec_version(void);
1298
/* returns LIBAVCODEC_BUILD constant */
1299
unsigned avcodec_build(void);
1300
void avcodec_init(void);
1301

    
1302
void register_avcodec(AVCodec *format);
1303
AVCodec *avcodec_find_encoder(enum CodecID id);
1304
AVCodec *avcodec_find_encoder_by_name(const char *name);
1305
AVCodec *avcodec_find_decoder(enum CodecID id);
1306
AVCodec *avcodec_find_decoder_by_name(const char *name);
1307
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
1308

    
1309
void avcodec_get_context_defaults(AVCodecContext *s);
1310
AVCodecContext *avcodec_alloc_context(void);
1311
AVFrame *avcodec_alloc_frame(void);
1312

    
1313
int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
1314
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
1315

    
1316
int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
1317
int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples, 
1318
                         int *frame_size_ptr,
1319
                         uint8_t *buf, int buf_size);
1320
int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture, 
1321
                         int *got_picture_ptr,
1322
                         uint8_t *buf, int buf_size);
1323
int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata, 
1324
                        int *data_size_ptr,
1325
                        uint8_t *buf, int buf_size);
1326
int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size, 
1327
                         const short *samples);
1328
int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size, 
1329
                         const AVFrame *pict);
1330

    
1331
int avcodec_close(AVCodecContext *avctx);
1332

    
1333
void avcodec_register_all(void);
1334

    
1335
void avcodec_flush_buffers(AVCodecContext *avctx);
1336

    
1337
/* misc usefull functions */
1338
/**
1339
 * reduce a fraction.
1340
 * this is usefull for framerate calculations
1341
 * @param max the maximum allowed for dst_nom & dst_den
1342
 * @return 1 if exact, 0 otherwise
1343
 */
1344
int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max);
1345

    
1346
/**
1347
 * rescale a 64bit integer.
1348
 * a simple a*b/c isnt possible as it can overflow
1349
 */
1350
int64_t av_rescale(int64_t a, int b, int c);
1351

    
1352

    
1353
/**
1354
 * Interface for 0.5.0 version
1355
 *
1356
 * do not even think about it's usage for this moment
1357
 */
1358

    
1359
typedef struct {
1360
    /// compressed size used from given memory buffer
1361
    int size;
1362
    /// I/P/B frame type
1363
    int frame_type;
1364
} avc_enc_result_t;
1365

    
1366
/**
1367
 * Commands
1368
 * order can't be changed - once it was defined
1369
 */
1370
typedef enum {
1371
    // general commands
1372
    AVC_OPEN_BY_NAME = 0xACA000,
1373
    AVC_OPEN_BY_CODEC_ID,
1374
    AVC_OPEN_BY_FOURCC,
1375
    AVC_CLOSE,
1376

    
1377
    AVC_FLUSH,
1378
    // pin - struct { uint8_t* src, uint_t src_size }
1379
    // pout - struct { AVPicture* img, consumed_bytes,
1380
    AVC_DECODE,
1381
    // pin - struct { AVPicture* img, uint8_t* dest, uint_t dest_size }
1382
    // pout - uint_t used_from_dest_size
1383
    AVC_ENCODE, 
1384

    
1385
    // query/get video commands
1386
    AVC_GET_VERSION = 0xACB000,
1387
    AVC_GET_WIDTH,
1388
    AVC_GET_HEIGHT,
1389
    AVC_GET_DELAY,
1390
    AVC_GET_QUANT_TABLE,
1391
    // ...
1392

    
1393
    // query/get audio commands
1394
    AVC_GET_FRAME_SIZE = 0xABC000,
1395

    
1396
    // maybe define some simple structure which
1397
    // might be passed to the user - but they can't
1398
    // contain any codec specific parts and these
1399
    // calls are usualy necessary only few times
1400

    
1401
    // set video commands
1402
    AVC_SET_WIDTH = 0xACD000,
1403
    AVC_SET_HEIGHT,
1404

    
1405
    // set video encoding commands
1406
    AVC_SET_FRAME_RATE = 0xACD800,
1407
    AVC_SET_QUALITY,
1408
    AVC_SET_HURRY_UP,
1409

    
1410
    // set audio commands
1411
    AVC_SET_SAMPLE_RATE = 0xACE000,
1412
    AVC_SET_CHANNELS,
1413

    
1414
} avc_cmd_t;
1415

    
1416
/**
1417
 * \param handle  allocated private structure by libavcodec
1418
 *                for initialization pass NULL - will be returned pout
1419
 *                user is supposed to know nothing about its structure
1420
 * \param cmd     type of operation to be performed
1421
 * \param pint    input parameter
1422
 * \param pout    output parameter
1423
 *
1424
 * \returns  command status - eventually for query command it might return
1425
 * integer resulting value
1426
 */
1427
int avcodec(void* handle, avc_cmd_t cmd, void* pin, void* pout);
1428

    
1429
/* memory */
1430
void *av_malloc(unsigned int size);
1431
void *av_mallocz(unsigned int size);
1432
void *av_realloc(void *ptr, unsigned int size);
1433
void av_free(void *ptr);
1434
char *av_strdup(const char *s);
1435
void __av_freep(void **ptr);
1436
#define av_freep(p) __av_freep((void **)(p))
1437
void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
1438
/* for static data only */
1439
/* call av_free_static to release all staticaly allocated tables */
1440
void av_free_static(void);
1441
void *__av_mallocz_static(void** location, unsigned int size);
1442
#define av_mallocz_static(p, s) __av_mallocz_static((void **)(p), s)
1443

    
1444
#ifdef __cplusplus
1445
}
1446
#endif
1447

    
1448
#endif /* AVCODEC_H */