Statistics
| Branch: | Revision:

ffmpeg / libavcodec / avcodec.h @ baaf3f46

History | View | Annotate | Download (59.4 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
#include "rational.h"
16
#include <sys/types.h> /* size_t */
17

    
18
#define FFMPEG_VERSION_INT     0x000408
19
#define FFMPEG_VERSION         "0.4.8"
20
#define LIBAVCODEC_BUILD       4698
21

    
22
#define LIBAVCODEC_VERSION_INT FFMPEG_VERSION_INT
23
#define LIBAVCODEC_VERSION     FFMPEG_VERSION
24

    
25
#define AV_STRINGIFY(s)        AV_TOSTRING(s)
26
#define AV_TOSTRING(s) #s
27
#define LIBAVCODEC_IDENT        "FFmpeg" LIBAVCODEC_VERSION "b" AV_STRINGIFY(LIBAVCODEC_BUILD)
28

    
29
enum CodecID {
30
    CODEC_ID_NONE, 
31
    CODEC_ID_MPEG1VIDEO,
32
    CODEC_ID_MPEG2VIDEO, /* prefered ID for MPEG Video 1 or 2 decoding */
33
    CODEC_ID_MPEG2VIDEO_XVMC,
34
    CODEC_ID_H263,
35
    CODEC_ID_RV10,
36
    CODEC_ID_RV20,
37
    CODEC_ID_MP2,
38
    CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
39
    CODEC_ID_VORBIS,
40
    CODEC_ID_AC3,
41
    CODEC_ID_MJPEG,
42
    CODEC_ID_MJPEGB,
43
    CODEC_ID_LJPEG,
44
    CODEC_ID_SP5X,
45
    CODEC_ID_MPEG4,
46
    CODEC_ID_RAWVIDEO,
47
    CODEC_ID_MSMPEG4V1,
48
    CODEC_ID_MSMPEG4V2,
49
    CODEC_ID_MSMPEG4V3,
50
    CODEC_ID_WMV1,
51
    CODEC_ID_WMV2,
52
    CODEC_ID_H263P,
53
    CODEC_ID_H263I,
54
    CODEC_ID_FLV1,
55
    CODEC_ID_SVQ1,
56
    CODEC_ID_SVQ3,
57
    CODEC_ID_DVVIDEO,
58
    CODEC_ID_DVAUDIO,
59
    CODEC_ID_WMAV1,
60
    CODEC_ID_WMAV2,
61
    CODEC_ID_MACE3,
62
    CODEC_ID_MACE6,
63
    CODEC_ID_HUFFYUV,
64
    CODEC_ID_CYUV,
65
    CODEC_ID_H264,
66
    CODEC_ID_INDEO3,
67
    CODEC_ID_VP3,
68
    CODEC_ID_THEORA,
69
    CODEC_ID_AAC,
70
    CODEC_ID_MPEG4AAC,
71
    CODEC_ID_ASV1,
72
    CODEC_ID_ASV2,
73
    CODEC_ID_FFV1,
74
    CODEC_ID_4XM,
75
    CODEC_ID_VCR1,
76
    CODEC_ID_CLJR,
77
    CODEC_ID_MDEC,
78
    CODEC_ID_ROQ,
79
    CODEC_ID_INTERPLAY_VIDEO,
80
    CODEC_ID_XAN_WC3,
81
    CODEC_ID_XAN_WC4,
82
    CODEC_ID_RPZA,
83
    CODEC_ID_CINEPAK,
84
    CODEC_ID_WS_VQA,
85
    CODEC_ID_MSRLE,
86
    CODEC_ID_MSVIDEO1,
87
    CODEC_ID_IDCIN,
88
    CODEC_ID_8BPS,
89
    CODEC_ID_SMC,
90
    CODEC_ID_FLIC,
91
    CODEC_ID_TRUEMOTION1,
92
    CODEC_ID_VMDVIDEO,
93
    CODEC_ID_VMDAUDIO,
94

    
95
    /* various pcm "codecs" */
96
    CODEC_ID_PCM_S16LE,
97
    CODEC_ID_PCM_S16BE,
98
    CODEC_ID_PCM_U16LE,
99
    CODEC_ID_PCM_U16BE,
100
    CODEC_ID_PCM_S8,
101
    CODEC_ID_PCM_U8,
102
    CODEC_ID_PCM_MULAW,
103
    CODEC_ID_PCM_ALAW,
104

    
105
    /* various adpcm codecs */
106
    CODEC_ID_ADPCM_IMA_QT,
107
    CODEC_ID_ADPCM_IMA_WAV,
108
    CODEC_ID_ADPCM_IMA_DK3,
109
    CODEC_ID_ADPCM_IMA_DK4,
110
    CODEC_ID_ADPCM_IMA_WS,
111
    CODEC_ID_ADPCM_MS,
112
    CODEC_ID_ADPCM_4XM,
113
    CODEC_ID_ADPCM_XA,
114
    CODEC_ID_ADPCM_ADX,
115

    
116
        /* AMR */
117
    CODEC_ID_AMR_NB,
118
    CODEC_ID_AMR_WB,
119

    
120
    /* RealAudio codecs*/
121
    CODEC_ID_RA_144,
122
    CODEC_ID_RA_288,
123

    
124
    /* various DPCM codecs */
125
    CODEC_ID_ROQ_DPCM,
126
    CODEC_ID_INTERPLAY_DPCM,
127
    CODEC_ID_XAN_DPCM,
128
    
129
    CODEC_ID_MPEG2TS, /* _FAKE_ codec to indicate a raw MPEG2 transport
130
                         stream (only used by libavformat) */
131
};
132

    
133
/* CODEC_ID_MP3LAME is absolete */
134
#define CODEC_ID_MP3LAME CODEC_ID_MP3
135

    
136
enum CodecType {
137
    CODEC_TYPE_UNKNOWN = -1,
138
    CODEC_TYPE_VIDEO,
139
    CODEC_TYPE_AUDIO,
140
    CODEC_TYPE_DATA,
141
};
142

    
143
/**
144
 * Pixel format. Notes: 
145
 *
146
 * PIX_FMT_RGBA32 is handled in an endian-specific manner. A RGBA
147
 * color is put together as:
148
 *  (A << 24) | (R << 16) | (G << 8) | B
149
 * This is stored as BGRA on little endian CPU architectures and ARGB on
150
 * big endian CPUs.
151
 *
152
 * When the pixel format is palettized RGB (PIX_FMT_PAL8), the palettized
153
 * image data is stored in AVFrame.data[0]. The palette is transported in
154
 * AVFrame.data[1] and, is 1024 bytes long (256 4-byte entries) and is
155
 * formatted the same as in PIX_FMT_RGBA32 described above (i.e., it is
156
 * also endian-specific). Note also that the individual RGB palette
157
 * components stored in AVFrame.data[1] should be in the range 0..255.
158
 * This is important as many custom PAL8 video codecs that were designed
159
 * to run on the IBM VGA graphics adapter use 6-bit palette components.
160
 */
161
enum PixelFormat {
162
    PIX_FMT_YUV420P,   ///< Planar YUV 4:2:0 (1 Cr & Cb sample per 2x2 Y samples)
163
    PIX_FMT_YUV422,    
164
    PIX_FMT_RGB24,     ///< Packed pixel, 3 bytes per pixel, RGBRGB...
165
    PIX_FMT_BGR24,     ///< Packed pixel, 3 bytes per pixel, BGRBGR...
166
    PIX_FMT_YUV422P,   ///< Planar YUV 4:2:2 (1 Cr & Cb sample per 2x1 Y samples)
167
    PIX_FMT_YUV444P,   ///< Planar YUV 4:4:4 (1 Cr & Cb sample per 1x1 Y samples)
168
    PIX_FMT_RGBA32,    ///< Packed pixel, 4 bytes per pixel, BGRABGRA..., stored in cpu endianness
169
    PIX_FMT_YUV410P,   ///< Planar YUV 4:1:0 (1 Cr & Cb sample per 4x4 Y samples)
170
    PIX_FMT_YUV411P,   ///< Planar YUV 4:1:1 (1 Cr & Cb sample per 4x1 Y samples)
171
    PIX_FMT_RGB565,    ///< always stored in cpu endianness 
172
    PIX_FMT_RGB555,    ///< always stored in cpu endianness, most significant bit to 1 
173
    PIX_FMT_GRAY8,
174
    PIX_FMT_MONOWHITE, ///< 0 is white 
175
    PIX_FMT_MONOBLACK, ///< 0 is black 
176
    PIX_FMT_PAL8,      ///< 8 bit with RGBA palette 
177
    PIX_FMT_YUVJ420P,  ///< Planar YUV 4:2:0 full scale (jpeg)
178
    PIX_FMT_YUVJ422P,  ///< Planar YUV 4:2:2 full scale (jpeg)
179
    PIX_FMT_YUVJ444P,  ///< Planar YUV 4:4:4 full scale (jpeg)
180
    PIX_FMT_XVMC_MPEG2_MC,///< XVideo Motion Acceleration via common packet passing(xvmc_render.h)
181
    PIX_FMT_XVMC_MPEG2_IDCT,
182
    PIX_FMT_NB,
183
};
184

    
185
/* currently unused, may be used if 24/32 bits samples ever supported */
186
enum SampleFormat {
187
    SAMPLE_FMT_S16 = 0,         ///< signed 16 bits 
188
};
189

    
190
/* in bytes */
191
#define AVCODEC_MAX_AUDIO_FRAME_SIZE 131072
192

    
193
/**
194
 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
195
 * this is mainly needed because some optimized bitstream readers read 
196
 * 32 or 64 bit at once and could read over the end<br>
197
 * Note, if the first 23 bits of the additional bytes are not 0 then damaged
198
 * MPEG bitstreams could cause overread and segfault
199
 */
200
#define FF_INPUT_BUFFER_PADDING_SIZE 8
201

    
202
/* motion estimation type, EPZS by default */
203
enum Motion_Est_ID {
204
    ME_ZERO = 1,
205
    ME_FULL,
206
    ME_LOG,
207
    ME_PHODS,
208
    ME_EPZS,
209
    ME_X1
210
};
211

    
212
typedef struct RcOverride{
213
    int start_frame;
214
    int end_frame;
215
    int qscale; // if this is 0 then quality_factor will be used instead
216
    float quality_factor;
217
} RcOverride;
218

    
219
/* only for ME compatiblity with old apps */
220
extern int motion_estimation_method;
221

    
222
/* ME algos sorted by quality */
223
//FIXME remove IMHO
224
static const __attribute__((unused)) int Motion_Est_QTab[] =
225
 { ME_ZERO, ME_PHODS, ME_LOG, ME_X1, ME_EPZS, ME_FULL };
226

    
227

    
228
#define FF_MAX_B_FRAMES 8
229

    
230
/* encoding support
231
   these flags can be passed in AVCodecContext.flags before initing 
232
   Note: note not everything is supported yet 
233
*/
234

    
235
#define CODEC_FLAG_QSCALE 0x0002  ///< use fixed qscale 
236
#define CODEC_FLAG_4MV    0x0004  ///< 4 MV per MB allowed / Advanced prediction for H263
237
#define CODEC_FLAG_QPEL   0x0010  ///< use qpel MC 
238
#define CODEC_FLAG_GMC    0x0020  ///< use GMC 
239
#define CODEC_FLAG_MV0    0x0040  ///< always try a MB with MV=<0,0> 
240
#define CODEC_FLAG_PART   0x0080  ///< use data partitioning 
241
/* parent program gurantees that the input for b-frame containing streams is not written to 
242
   for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
243
#define CODEC_FLAG_INPUT_PRESERVED 0x0100
244
#define CODEC_FLAG_PASS1 0x0200   ///< use internal 2pass ratecontrol in first  pass mode 
245
#define CODEC_FLAG_PASS2 0x0400   ///< use internal 2pass ratecontrol in second pass mode 
246
#define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg) 
247
#define CODEC_FLAG_GRAY  0x2000   ///< only decode/encode grayscale 
248
#define CODEC_FLAG_EMU_EDGE 0x4000///< dont draw edges 
249
#define CODEC_FLAG_PSNR           0x8000 ///< error[?] variables will be set during encoding 
250
#define CODEC_FLAG_TRUNCATED  0x00010000 /** input bitstream might be truncated at a random location instead 
251
                                            of only at frame boundaries */
252
#define CODEC_FLAG_NORMALIZE_AQP  0x00020000 ///< normalize adaptive quantization 
253
#define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct 
254
#define CODEC_FLAG_LOW_DELAY      0x00080000 ///< force low delay
255
#define CODEC_FLAG_ALT_SCAN       0x00100000 ///< use alternate scan 
256
#define CODEC_FLAG_TRELLIS_QUANT  0x00200000 ///< use trellis quantization 
257
#define CODEC_FLAG_GLOBAL_HEADER  0x00400000 ///< place global headers in extradata instead of every keyframe 
258
#define CODEC_FLAG_BITEXACT       0x00800000 ///< use only bitexact stuff (except (i)dct) 
259
/* Fx : Flag for h263+ extra options */
260
#define CODEC_FLAG_H263P_AIC      0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
261
#define CODEC_FLAG_AC_PRED        0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
262
#define CODEC_FLAG_H263P_UMV      0x02000000 ///< Unlimited motion vector  
263
#define CODEC_FLAG_CBP_RD         0x04000000 ///< use rate distortion optimization for cbp
264
#define CODEC_FLAG_QP_RD          0x08000000 ///< use rate distortion optimization for qp selectioon
265
#define CODEC_FLAG_H263P_AIV      0x00000008 ///< H263 Alternative inter vlc
266
#define CODEC_FLAG_OBMC           0x00000001 ///< OBMC
267
#define CODEC_FLAG_LOOP_FILTER    0x00000800 ///< loop filter
268
#define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
269
#define CODEC_FLAG_INTERLACED_ME  0x20000000 ///< interlaced motion estimation
270
#define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
271
/* Unsupported options :
272
 *                 Syntax Arithmetic coding (SAC)
273
 *                 Reference Picture Selection
274
 *                 Independant Segment Decoding */
275
/* /Fx */
276
/* codec capabilities */
277

    
278
#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback 
279
/**
280
 * Codec uses get_buffer() for allocating buffers.
281
 * direct rendering method 1
282
 */
283
#define CODEC_CAP_DR1             0x0002
284
/* if 'parse_only' field is true, then avcodec_parse_frame() can be
285
   used */
286
#define CODEC_CAP_PARSE_ONLY      0x0004
287
#define CODEC_CAP_TRUNCATED       0x0008
288

    
289
//the following defines might change, so dont expect compatibility if u use them
290
#define MB_TYPE_INTRA4x4   0x0001
291
#define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
292
#define MB_TYPE_INTRA_PCM  0x0004 //FIXME h264 specific
293
#define MB_TYPE_16x16      0x0008
294
#define MB_TYPE_16x8       0x0010
295
#define MB_TYPE_8x16       0x0020
296
#define MB_TYPE_8x8        0x0040
297
#define MB_TYPE_INTERLACED 0x0080
298
#define MB_TYPE_DIRECT2     0x0100 //FIXME
299
#define MB_TYPE_ACPRED     0x0200
300
#define MB_TYPE_GMC        0x0400
301
#define MB_TYPE_SKIP       0x0800
302
#define MB_TYPE_P0L0       0x1000
303
#define MB_TYPE_P1L0       0x2000
304
#define MB_TYPE_P0L1       0x4000
305
#define MB_TYPE_P1L1       0x8000
306
#define MB_TYPE_L0         (MB_TYPE_P0L0 | MB_TYPE_P1L0)
307
#define MB_TYPE_L1         (MB_TYPE_P0L1 | MB_TYPE_P1L1)
308
#define MB_TYPE_L0L1       (MB_TYPE_L0   | MB_TYPE_L1)
309
#define MB_TYPE_QUANT      0x00010000
310
#define MB_TYPE_CBP        0x00020000
311
//Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
312

    
313
/**
314
 * Pan Scan area.
315
 * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
316
 */
317
typedef struct AVPanScan{
318
    /**
319
     * id.
320
     * - encoding: set by user.
321
     * - decoding: set by lavc
322
     */
323
    int id;
324

    
325
    /**
326
     * width and height in 1/16 pel
327
     * - encoding: set by user.
328
     * - decoding: set by lavc
329
     */
330
    int width;
331
    int height;
332

    
333
    /**
334
     * position of the top left corner in 1/16 pel for up to 3 fields/frames.
335
     * - encoding: set by user.
336
     * - decoding: set by lavc
337
     */
338
    int16_t position[3][2];
339
}AVPanScan;
340

    
341
#define FF_COMMON_FRAME \
342
    /**\
343
     * pointer to the picture planes.\
344
     * this might be different from the first allocated byte\
345
     * - encoding: \
346
     * - decoding: \
347
     */\
348
    uint8_t *data[4];\
349
    int linesize[4];\
350
    /**\
351
     * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
352
     * this isnt used by lavc unless the default get/release_buffer() is used\
353
     * - encoding: \
354
     * - decoding: \
355
     */\
356
    uint8_t *base[4];\
357
    /**\
358
     * 1 -> keyframe, 0-> not\
359
     * - encoding: set by lavc\
360
     * - decoding: set by lavc\
361
     */\
362
    int key_frame;\
363
\
364
    /**\
365
     * picture type of the frame, see ?_TYPE below.\
366
     * - encoding: set by lavc for coded_picture (and set by user for input)\
367
     * - decoding: set by lavc\
368
     */\
369
    int pict_type;\
370
\
371
    /**\
372
     * presentation timestamp in micro seconds (time when frame should be shown to user)\
373
     * if 0 then the frame_rate will be used as reference\
374
     * - encoding: MUST be set by user\
375
     * - decoding: set by lavc\
376
     */\
377
    int64_t pts;\
378
\
379
    /**\
380
     * picture number in bitstream order.\
381
     * - encoding: set by\
382
     * - decoding: set by lavc\
383
     */\
384
    int coded_picture_number;\
385
    /**\
386
     * picture number in display order.\
387
     * - encoding: set by\
388
     * - decoding: set by lavc\
389
     */\
390
    int display_picture_number;\
391
\
392
    /**\
393
     * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
394
     * - encoding: set by lavc for coded_picture (and set by user for input)\
395
     * - decoding: set by lavc\
396
     */\
397
    int quality; \
398
\
399
    /**\
400
     * buffer age (1->was last buffer and dint change, 2->..., ...).\
401
     * set to INT_MAX if the buffer has not been used yet \
402
     * - encoding: unused\
403
     * - decoding: MUST be set by get_buffer()\
404
     */\
405
    int age;\
406
\
407
    /**\
408
     * is this picture used as reference\
409
     * - encoding: unused\
410
     * - decoding: set by lavc (before get_buffer() call))\
411
     */\
412
    int reference;\
413
\
414
    /**\
415
     * QP table\
416
     * - encoding: unused\
417
     * - decoding: set by lavc\
418
     */\
419
    int8_t *qscale_table;\
420
    /**\
421
     * QP store stride\
422
     * - encoding: unused\
423
     * - decoding: set by lavc\
424
     */\
425
    int qstride;\
426
\
427
    /**\
428
     * mbskip_table[mb]>=1 if MB didnt change\
429
     * stride= mb_width = (width+15)>>4\
430
     * - encoding: unused\
431
     * - decoding: set by lavc\
432
     */\
433
    uint8_t *mbskip_table;\
434
\
435
    /**\
436
     * Motion vector table\
437
     * - encoding: unused\
438
     * - decoding: set by lavc\
439
     */\
440
    int16_t (*motion_val[2])[2];\
441
\
442
    /**\
443
     * Macroblock type table\
444
     * mb_type_base + mb_width + 2\
445
     * - encoding: unused\
446
     * - decoding: set by lavc\
447
     */\
448
    uint32_t *mb_type;\
449
\
450
    /**\
451
     * Macroblock size: (0->16x16, 1->8x8, 2-> 4x4, 3-> 2x2)\
452
     * - encoding: unused\
453
     * - decoding: set by lavc\
454
     */\
455
    uint8_t motion_subsample_log2;\
456
\
457
    /**\
458
     * for some private data of the user\
459
     * - encoding: unused\
460
     * - decoding: set by user\
461
     */\
462
    void *opaque;\
463
\
464
    /**\
465
     * error\
466
     * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
467
     * - decoding: unused\
468
     */\
469
    uint64_t error[4];\
470
\
471
    /**\
472
     * type of the buffer (to keep track of who has to dealloc data[*])\
473
     * - encoding: set by the one who allocs it\
474
     * - decoding: set by the one who allocs it\
475
     * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
476
     */\
477
    int type;\
478
    \
479
    /**\
480
     * when decoding, this signal how much the picture must be delayed.\
481
     * extra_delay = repeat_pict / (2*fps)\
482
     * - encoding: unused\
483
     * - decoding: set by lavc\
484
     */\
485
    int repeat_pict;\
486
    \
487
    /**\
488
     * \
489
     */\
490
    int qscale_type;\
491
    \
492
    /**\
493
     * The content of the picture is interlaced.\
494
     * - encoding: set by user\
495
     * - decoding: set by lavc (default 0)\
496
     */\
497
    int interlaced_frame;\
498
    \
499
    /**\
500
     * if the content is interlaced, is top field displayed first.\
501
     * - encoding: set by user\
502
     * - decoding: set by lavc\
503
     */\
504
    int top_field_first;\
505
    \
506
    /**\
507
     * Pan scan.\
508
     * - encoding: set by user\
509
     * - decoding: set by lavc\
510
     */\
511
    AVPanScan *pan_scan;\
512
    \
513
    /**\
514
     * tell user application that palette has changed from previous frame.\
515
     * - encoding: ??? (no palette-enabled encoder yet)\
516
     * - decoding: set by lavc (default 0)\
517
     */\
518
    int palette_has_changed;\
519
    \
520
    /**\
521
     * Codec suggestion on buffer type if != 0\
522
     * - encoding: unused\
523
     * - decoding: set by lavc (before get_buffer() call))\
524
     */\
525
    int buffer_hints;\
526

    
527
#define FF_QSCALE_TYPE_MPEG1        0
528
#define FF_QSCALE_TYPE_MPEG2        1
529

    
530
#define FF_BUFFER_TYPE_INTERNAL 1
531
#define FF_BUFFER_TYPE_USER     2 ///< Direct rendering buffers (image is (de)allocated by user)
532
#define FF_BUFFER_TYPE_SHARED   4 ///< buffer from somewher else, dont dealloc image (data/base)
533
#define FF_BUFFER_TYPE_COPY     8 ///< just a (modified) copy of some other buffer, dont dealloc anything
534

    
535

    
536
#define FF_I_TYPE 1 // Intra
537
#define FF_P_TYPE 2 // Predicted
538
#define FF_B_TYPE 3 // Bi-dir predicted
539
#define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
540
#define FF_SI_TYPE 5
541
#define FF_SP_TYPE 6
542

    
543
#define FF_BUFFER_HINTS_VALID    0x01 // Buffer hints value is meaningful (if 0 ignore)
544
#define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
545
#define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
546
#define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
547

    
548
/**
549
 * Audio Video Frame.
550
 */
551
typedef struct AVFrame {
552
    FF_COMMON_FRAME
553
} AVFrame;
554

    
555
#define DEFAULT_FRAME_RATE_BASE 1001000
556

    
557
/**
558
 * main external api structure.
559
 */
560
typedef struct AVCodecContext {
561
    /**
562
     * the average bitrate.
563
     * - encoding: set by user. unused for constant quantizer encoding
564
     * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream 
565
     */
566
    int bit_rate;
567

    
568
    /**
569
     * number of bits the bitstream is allowed to diverge from the reference.
570
     *           the reference can be CBR (for CBR pass1) or VBR (for pass2)
571
     * - encoding: set by user. unused for constant quantizer encoding
572
     * - decoding: unused
573
     */
574
    int bit_rate_tolerance; 
575

    
576
    /**
577
     * CODEC_FLAG_*.
578
     * - encoding: set by user.
579
     * - decoding: set by user.
580
     */
581
    int flags;
582

    
583
    /**
584
     * some codecs needs additionnal format info. It is stored here
585
     * - encoding: set by user. 
586
     * - decoding: set by lavc. (FIXME is this ok?)
587
     */
588
    int sub_id;
589

    
590
    /**
591
     * motion estimation algorithm used for video coding.
592
     * - encoding: MUST be set by user.
593
     * - decoding: unused
594
     */
595
    int me_method;
596

    
597
    /**
598
     * some codecs need / can use extra-data like huffman tables.
599
     * mjpeg: huffman tables
600
     * rv10: additional flags
601
     * mpeg4: global headers (they can be in the bitstream or here)
602
     * - encoding: set/allocated/freed by lavc.
603
     * - decoding: set/allocated/freed by user.
604
     */
605
    void *extradata;
606
    int extradata_size;
607
    
608
    /* video only */
609
    /**
610
     * frames per sec multiplied by frame_rate_base.
611
     * for variable fps this is the precission, so if the timestamps 
612
     * can be specified in msec precssion then this is 1000*frame_rate_base
613
     * - encoding: MUST be set by user
614
     * - decoding: set by lavc. 0 or the frame_rate if available
615
     */
616
    int frame_rate;
617
    
618
    /**
619
     * width / height.
620
     * - encoding: MUST be set by user. 
621
     * - decoding: set by user if known, codec should override / dynamically change if needed
622
     */
623
    int width, height;
624
    
625
#define FF_ASPECT_SQUARE 1
626
#define FF_ASPECT_4_3_625 2
627
#define FF_ASPECT_4_3_525 3
628
#define FF_ASPECT_16_9_625 4
629
#define FF_ASPECT_16_9_525 5
630
#define FF_ASPECT_EXTENDED 15
631

    
632
    /**
633
     * the number of pictures in a group of pitures, or 0 for intra_only.
634
     * - encoding: set by user.
635
     * - decoding: unused
636
     */
637
    int gop_size;
638

    
639
    /**
640
     * pixel format, see PIX_FMT_xxx.
641
     * - encoding: FIXME: used by ffmpeg to decide whether an pix_fmt
642
     *                    conversion is in order. This only works for
643
     *                    codecs with one supported pix_fmt, we should
644
     *                    do something for a generic case as well.
645
     * - decoding: set by lavc.
646
     */
647
    enum PixelFormat pix_fmt;
648
 
649
    /**
650
     * Frame rate emulation. If not zero lower layer (i.e. format handler) 
651
     * has to read frames at native frame rate.
652
     * - encoding: set by user.
653
     * - decoding: unused.
654
     */
655
    int rate_emu;
656
       
657
    /**
658
     * if non NULL, 'draw_horiz_band' is called by the libavcodec
659
     * decoder to draw an horizontal band. It improve cache usage. Not
660
     * all codecs can do that. You must check the codec capabilities
661
     * before
662
     * - encoding: unused
663
     * - decoding: set by user.
664
     * @param height the height of the slice
665
     * @param y the y position of the slice
666
     * @param type 1->top field, 2->bottom field, 3->frame
667
     * @param offset offset into the AVFrame.data from which the slice should be read
668
     */
669
    void (*draw_horiz_band)(struct AVCodecContext *s,
670
                            const AVFrame *src, int offset[4],
671
                            int y, int type, int height);
672

    
673
    /* audio only */
674
    int sample_rate; ///< samples per sec 
675
    int channels;
676
    int sample_fmt;  ///< sample format, currenly unused 
677

    
678
    /* the following data should not be initialized */
679
    int frame_size;     ///< in samples, initialized when calling 'init' 
680
    int frame_number;   ///< audio or video frame number 
681
    int real_pict_num;  ///< returns the real picture number of previous encoded frame 
682
    
683
    /**
684
     * number of frames the decoded output will be delayed relative to 
685
     * the encoded input.
686
     * - encoding: set by lavc.
687
     * - decoding: unused
688
     */
689
    int delay;
690
    
691
    /* - encoding parameters */
692
    float qcompress;  ///< amount of qscale change between easy & hard scenes (0.0-1.0)
693
    float qblur;      ///< amount of qscale smoothing over time (0.0-1.0) 
694
    
695
    /**
696
     * minimum quantizer.
697
     * - encoding: set by user.
698
     * - decoding: unused
699
     */
700
    int qmin;
701

    
702
    /**
703
     * maximum quantizer.
704
     * - encoding: set by user.
705
     * - decoding: unused
706
     */
707
    int qmax;
708

    
709
    /**
710
     * maximum quantizer difference etween frames.
711
     * - encoding: set by user.
712
     * - decoding: unused
713
     */
714
    int max_qdiff;
715

    
716
    /**
717
     * maximum number of b frames between non b frames.
718
     * note: the output will be delayed by max_b_frames+1 relative to the input
719
     * - encoding: set by user.
720
     * - decoding: unused
721
     */
722
    int max_b_frames;
723

    
724
    /**
725
     * qscale factor between ip and b frames.
726
     * - encoding: set by user.
727
     * - decoding: unused
728
     */
729
    float b_quant_factor;
730
    
731
    /** obsolete FIXME remove */
732
    int rc_strategy;
733
    int b_frame_strategy;
734

    
735
    /**
736
     * hurry up amount.
737
     * - encoding: unused
738
     * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
739
     */
740
    int hurry_up;
741
    
742
    struct AVCodec *codec;
743
    
744
    void *priv_data;
745

    
746
    /* unused, FIXME remove*/
747
    int rtp_mode;
748
    
749
    int rtp_payload_size;   /* The size of the RTP payload, the coder will  */
750
                            /* do it's best to deliver a chunk with size    */
751
                            /* below rtp_payload_size, the chunk will start */
752
                            /* with a start code on some codecs like H.263  */
753
                            /* This doesn't take account of any particular  */
754
                            /* headers inside the transmited RTP payload    */
755

    
756
    
757
    /* The RTP callcack: This function is called  */
758
    /* every time the encoder as a packet to send */
759
    /* Depends on the encoder if the data starts  */
760
    /* with a Start Code (it should) H.263 does   */
761
    void (*rtp_callback)(void *data, int size, int packet_number); 
762

    
763
    /* statistics, used for 2-pass encoding */
764
    int mv_bits;
765
    int header_bits;
766
    int i_tex_bits;
767
    int p_tex_bits;
768
    int i_count;
769
    int p_count;
770
    int skip_count;
771
    int misc_bits;
772
    
773
    /**
774
     * number of bits used for the previously encoded frame.
775
     * - encoding: set by lavc
776
     * - decoding: unused
777
     */
778
    int frame_bits;
779

    
780
    /**
781
     * private data of the user, can be used to carry app specific stuff.
782
     * - encoding: set by user
783
     * - decoding: set by user
784
     */
785
    void *opaque;
786

    
787
    char codec_name[32];
788
    enum CodecType codec_type; /* see CODEC_TYPE_xxx */
789
    enum CodecID codec_id; /* see CODEC_ID_xxx */
790
    
791
    /**
792
     * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
793
     * this is used to workaround some encoder bugs
794
     * - encoding: set by user, if not then the default based on codec_id will be used
795
     * - decoding: set by user, will be converted to upper case by lavc during init
796
     */
797
    unsigned int codec_tag;
798
    
799
    /**
800
     * workaround bugs in encoders which sometimes cannot be detected automatically.
801
     * - encoding: unused
802
     * - decoding: set by user
803
     */
804
    int workaround_bugs;
805
#define FF_BUG_AUTODETECT       1  ///< autodetection
806
#define FF_BUG_OLD_MSMPEG4      2
807
#define FF_BUG_XVID_ILACE       4
808
#define FF_BUG_UMP4             8
809
#define FF_BUG_NO_PADDING       16
810
#define FF_BUG_AC_VLC           0  ///< will be removed, libavcodec can now handle these non compliant files by default
811
#define FF_BUG_QPEL_CHROMA      64
812
#define FF_BUG_STD_QPEL         128
813
#define FF_BUG_QPEL_CHROMA2     256
814
#define FF_BUG_DIRECT_BLOCKSIZE 512
815
#define FF_BUG_EDGE             1024
816
//#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
817
        
818
    /**
819
     * luma single coeff elimination threshold.
820
     * - encoding: set by user
821
     * - decoding: unused
822
     */
823
    int luma_elim_threshold;
824
    
825
    /**
826
     * chroma single coeff elimination threshold.
827
     * - encoding: set by user
828
     * - decoding: unused
829
     */
830
    int chroma_elim_threshold;
831
    
832
    /**
833
     * strictly follow the std (MPEG4, ...).
834
     * - encoding: set by user
835
     * - decoding: unused
836
     */
837
    int strict_std_compliance;
838
    
839
    /**
840
     * qscale offset between ip and b frames.
841
     * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
842
     * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
843
     * - encoding: set by user.
844
     * - decoding: unused
845
     */
846
    float b_quant_offset;
847
    
848
    /**
849
     * error resilience higher values will detect more errors but may missdetect
850
     * some more or less valid parts as errors.
851
     * - encoding: unused
852
     * - decoding: set by user
853
     */
854
    int error_resilience;
855
#define FF_ER_CAREFULL        1
856
#define FF_ER_COMPLIANT       2
857
#define FF_ER_AGGRESSIVE      3
858
#define FF_ER_VERY_AGGRESSIVE 4
859
    
860
    /**
861
     * called at the beginning of each frame to get a buffer for it.
862
     * if pic.reference is set then the frame will be read later by lavc
863
     * width and height should be rounded up to the next multiple of 16
864
     * - encoding: unused
865
     * - decoding: set by lavc, user can override
866
     */
867
    int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
868
    
869
    /**
870
     * called to release buffers which where allocated with get_buffer.
871
     * a released buffer can be reused in get_buffer()
872
     * pic.data[*] must be set to NULL
873
     * - encoding: unused
874
     * - decoding: set by lavc, user can override
875
     */
876
    void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
877

    
878
    /**
879
     * is 1 if the decoded stream contains b frames, 0 otherwise.
880
     * - encoding: unused
881
     * - decoding: set by lavc
882
     */
883
    int has_b_frames;
884
    
885
    int block_align; ///< used by some WAV based audio codecs
886
    
887
    int parse_only; /* - decoding only: if true, only parsing is done
888
                       (function avcodec_parse_frame()). The frame
889
                       data is returned. Only MPEG codecs support this now. */
890
    
891
    /**
892
     * 0-> h263 quant 1-> mpeg quant.
893
     * - encoding: set by user.
894
     * - decoding: unused
895
     */
896
    int mpeg_quant;
897
    
898
    /**
899
     * pass1 encoding statistics output buffer.
900
     * - encoding: set by lavc
901
     * - decoding: unused
902
     */
903
    char *stats_out;
904
    
905
    /**
906
     * pass2 encoding statistics input buffer.
907
     * concatenated stuff from stats_out of pass1 should be placed here
908
     * - encoding: allocated/set/freed by user
909
     * - decoding: unused
910
     */
911
    char *stats_in;
912
    
913
    /**
914
     * ratecontrol qmin qmax limiting method.
915
     * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
916
     * - encoding: set by user.
917
     * - decoding: unused
918
     */
919
    float rc_qsquish;
920

    
921
    float rc_qmod_amp;
922
    int rc_qmod_freq;
923
    
924
    /**
925
     * ratecontrol override, see RcOverride.
926
     * - encoding: allocated/set/freed by user.
927
     * - decoding: unused
928
     */
929
    RcOverride *rc_override;
930
    int rc_override_count;
931
    
932
    /**
933
     * rate control equation.
934
     * - encoding: set by user
935
     * - decoding: unused
936
     */
937
    char *rc_eq;
938
    
939
    /**
940
     * maximum bitrate.
941
     * - encoding: set by user.
942
     * - decoding: unused
943
     */
944
    int rc_max_rate;
945
    
946
    /**
947
     * minimum bitrate.
948
     * - encoding: set by user.
949
     * - decoding: unused
950
     */
951
    int rc_min_rate;
952
    
953
    /**
954
     * decoder bitstream buffer size.
955
     * - encoding: set by user.
956
     * - decoding: unused
957
     */
958
    int rc_buffer_size;
959
    float rc_buffer_aggressivity;
960

    
961
    /**
962
     * qscale factor between p and i frames.
963
     * - encoding: set by user.
964
     * - decoding: unused
965
     */
966
    float i_quant_factor;
967
    
968
    /**
969
     * qscale offset between p and i frames.
970
     * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
971
     * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
972
     * - encoding: set by user.
973
     * - decoding: unused
974
     */
975
    float i_quant_offset;
976
    
977
    /**
978
     * initial complexity for pass1 ratecontrol.
979
     * - encoding: set by user.
980
     * - decoding: unused
981
     */
982
    float rc_initial_cplx;
983

    
984
    /**
985
     * dct algorithm, see FF_DCT_* below.
986
     * - encoding: set by user
987
     * - decoding: unused
988
     */
989
    int dct_algo;
990
#define FF_DCT_AUTO    0
991
#define FF_DCT_FASTINT 1
992
#define FF_DCT_INT     2
993
#define FF_DCT_MMX     3
994
#define FF_DCT_MLIB    4
995
#define FF_DCT_ALTIVEC 5
996
#define FF_DCT_FAAN    6
997
    
998
    /**
999
     * luminance masking (0-> disabled).
1000
     * - encoding: set by user
1001
     * - decoding: unused
1002
     */
1003
    float lumi_masking;
1004
    
1005
    /**
1006
     * temporary complexity masking (0-> disabled).
1007
     * - encoding: set by user
1008
     * - decoding: unused
1009
     */
1010
    float temporal_cplx_masking;
1011
    
1012
    /**
1013
     * spatial complexity masking (0-> disabled).
1014
     * - encoding: set by user
1015
     * - decoding: unused
1016
     */
1017
    float spatial_cplx_masking;
1018
    
1019
    /**
1020
     * p block masking (0-> disabled).
1021
     * - encoding: set by user
1022
     * - decoding: unused
1023
     */
1024
    float p_masking;
1025

    
1026
    /**
1027
     * darkness masking (0-> disabled).
1028
     * - encoding: set by user
1029
     * - decoding: unused
1030
     */
1031
    float dark_masking;
1032
    
1033
    
1034
    /* for binary compatibility */
1035
    int unused;
1036
    
1037
    /**
1038
     * idct algorithm, see FF_IDCT_* below.
1039
     * - encoding: set by user
1040
     * - decoding: set by user
1041
     */
1042
    int idct_algo;
1043
#define FF_IDCT_AUTO         0
1044
#define FF_IDCT_INT          1
1045
#define FF_IDCT_SIMPLE       2
1046
#define FF_IDCT_SIMPLEMMX    3
1047
#define FF_IDCT_LIBMPEG2MMX  4
1048
#define FF_IDCT_PS2          5
1049
#define FF_IDCT_MLIB         6
1050
#define FF_IDCT_ARM          7
1051
#define FF_IDCT_ALTIVEC      8
1052
#define FF_IDCT_SH4          9
1053
#define FF_IDCT_SIMPLEARM    10
1054

    
1055
    /**
1056
     * slice count.
1057
     * - encoding: set by lavc
1058
     * - decoding: set by user (or 0)
1059
     */
1060
    int slice_count;
1061
    /**
1062
     * slice offsets in the frame in bytes.
1063
     * - encoding: set/allocated by lavc
1064
     * - decoding: set/allocated by user (or NULL)
1065
     */
1066
    int *slice_offset;
1067

    
1068
    /**
1069
     * error concealment flags.
1070
     * - encoding: unused
1071
     * - decoding: set by user
1072
     */
1073
    int error_concealment;
1074
#define FF_EC_GUESS_MVS   1
1075
#define FF_EC_DEBLOCK     2
1076

    
1077
    /**
1078
     * dsp_mask could be add used to disable unwanted CPU features
1079
     * CPU features (i.e. MMX, SSE. ...)
1080
     *
1081
     * with FORCE flag you may instead enable given CPU features
1082
     * (Dangerous: usable in case of misdetection, improper usage however will
1083
     * result into program crash)
1084
     */
1085
    unsigned dsp_mask;
1086
#define FF_MM_FORCE        0x80000000 /* force usage of selected flags (OR) */
1087
    /* lower 16 bits - CPU features */
1088
#ifdef HAVE_MMX
1089
#define FF_MM_MMX        0x0001 /* standard MMX */
1090
#define FF_MM_3DNOW        0x0004 /* AMD 3DNOW */
1091
#define FF_MM_MMXEXT        0x0002 /* SSE integer functions or AMD MMX ext */
1092
#define FF_MM_SSE        0x0008 /* SSE functions */
1093
#define FF_MM_SSE2        0x0010 /* PIV SSE2 functions */
1094
#endif /* HAVE_MMX */
1095

    
1096
    /**
1097
     * bits per sample/pixel from the demuxer (needed for huffyuv).
1098
     * - encoding: set by lavc
1099
     * - decoding: set by user
1100
     */
1101
     int bits_per_sample;
1102
    
1103
    /**
1104
     * prediction method (needed for huffyuv).
1105
     * - encoding: set by user
1106
     * - decoding: unused
1107
     */
1108
     int prediction_method;
1109
#define FF_PRED_LEFT   0
1110
#define FF_PRED_PLANE  1
1111
#define FF_PRED_MEDIAN 2
1112
    
1113
    /**
1114
     * sample aspect ratio (0 if unknown).
1115
     * numerator and denominator must be relative prime and smaller then 256 for some video standards
1116
     * - encoding: set by user.
1117
     * - decoding: set by lavc.
1118
     */
1119
    AVRational sample_aspect_ratio;
1120

    
1121
    /**
1122
     * the picture in the bitstream.
1123
     * - encoding: set by lavc
1124
     * - decoding: set by lavc
1125
     */
1126
    AVFrame *coded_frame;
1127

    
1128
    /**
1129
     * debug.
1130
     * - encoding: set by user.
1131
     * - decoding: set by user.
1132
     */
1133
    int debug;
1134
#define FF_DEBUG_PICT_INFO 1
1135
#define FF_DEBUG_RC        2
1136
#define FF_DEBUG_BITSTREAM 4
1137
#define FF_DEBUG_MB_TYPE   8
1138
#define FF_DEBUG_QP        16
1139
#define FF_DEBUG_MV        32
1140
//#define FF_DEBUG_VIS_MV    0x00000040
1141
#define FF_DEBUG_SKIP      0x00000080
1142
#define FF_DEBUG_STARTCODE 0x00000100
1143
#define FF_DEBUG_PTS       0x00000200
1144
#define FF_DEBUG_ER        0x00000400
1145
#define FF_DEBUG_MMCO      0x00000800
1146
#define FF_DEBUG_BUGS      0x00001000
1147
#define FF_DEBUG_VIS_QP    0x00002000
1148
#define FF_DEBUG_VIS_MB_TYPE 0x00004000
1149
    
1150
    /**
1151
     * debug.
1152
     * - encoding: set by user.
1153
     * - decoding: set by user.
1154
     */
1155
    int debug_mv;
1156
#define FF_DEBUG_VIS_MV_P_FOR  0x00000001 //visualize forward predicted MVs of P frames
1157
#define FF_DEBUG_VIS_MV_B_FOR  0x00000002 //visualize forward predicted MVs of B frames
1158
#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1159

    
1160
    /**
1161
     * error.
1162
     * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1163
     * - decoding: unused
1164
     */
1165
    uint64_t error[4];
1166
    
1167
    /**
1168
     * minimum MB quantizer.
1169
     * - encoding: set by user.
1170
     * - decoding: unused
1171
     */
1172
    int mb_qmin;
1173

    
1174
    /**
1175
     * maximum MB quantizer.
1176
     * - encoding: set by user.
1177
     * - decoding: unused
1178
     */
1179
    int mb_qmax;
1180
    
1181
    /**
1182
     * motion estimation compare function.
1183
     * - encoding: set by user.
1184
     * - decoding: unused
1185
     */
1186
    int me_cmp;
1187
    /**
1188
     * subpixel motion estimation compare function.
1189
     * - encoding: set by user.
1190
     * - decoding: unused
1191
     */
1192
    int me_sub_cmp;
1193
    /**
1194
     * macroblock compare function (not supported yet).
1195
     * - encoding: set by user.
1196
     * - decoding: unused
1197
     */
1198
    int mb_cmp;
1199
#define FF_CMP_SAD  0
1200
#define FF_CMP_SSE  1
1201
#define FF_CMP_SATD 2
1202
#define FF_CMP_DCT  3
1203
#define FF_CMP_PSNR 4
1204
#define FF_CMP_BIT  5
1205
#define FF_CMP_RD   6
1206
#define FF_CMP_ZERO 7
1207
#define FF_CMP_CHROMA 256
1208
    
1209
    /**
1210
     * ME diamond size & shape.
1211
     * - encoding: set by user.
1212
     * - decoding: unused
1213
     */
1214
    int dia_size;
1215

    
1216
    /**
1217
     * amount of previous MV predictors (2a+1 x 2a+1 square).
1218
     * - encoding: set by user.
1219
     * - decoding: unused
1220
     */
1221
    int last_predictor_count;
1222

    
1223
    /**
1224
     * pre pass for motion estimation.
1225
     * - encoding: set by user.
1226
     * - decoding: unused
1227
     */
1228
    int pre_me;
1229

    
1230
    /**
1231
     * motion estimation pre pass compare function.
1232
     * - encoding: set by user.
1233
     * - decoding: unused
1234
     */
1235
    int me_pre_cmp;
1236

    
1237
    /**
1238
     * ME pre pass diamond size & shape.
1239
     * - encoding: set by user.
1240
     * - decoding: unused
1241
     */
1242
    int pre_dia_size;
1243

    
1244
    /**
1245
     * subpel ME quality.
1246
     * - encoding: set by user.
1247
     * - decoding: unused
1248
     */
1249
    int me_subpel_quality;
1250

    
1251
    /**
1252
     * callback to negotiate the pixelFormat.
1253
     * @param fmt is the list of formats which are supported by the codec,
1254
     * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1255
     * the first is allways the native one
1256
     * @return the choosen format
1257
     * - encoding: unused
1258
     * - decoding: set by user, if not set then the native format will always be choosen
1259
     */
1260
    enum PixelFormat (*get_format)(struct AVCodecContext *s, enum PixelFormat * fmt);
1261

    
1262
    /**
1263
     * DTG active format information (additionnal aspect ratio
1264
     * information only used in DVB MPEG2 transport streams). 0 if
1265
     * not set.
1266
     * 
1267
     * - encoding: unused.
1268
     * - decoding: set by decoder 
1269
     */
1270
    int dtg_active_format;
1271
#define FF_DTG_AFD_SAME         8
1272
#define FF_DTG_AFD_4_3          9
1273
#define FF_DTG_AFD_16_9         10
1274
#define FF_DTG_AFD_14_9         11
1275
#define FF_DTG_AFD_4_3_SP_14_9  13
1276
#define FF_DTG_AFD_16_9_SP_14_9 14
1277
#define FF_DTG_AFD_SP_4_3       15
1278

    
1279
    /**
1280
     * Maximum motion estimation search range in subpel units.
1281
     * if 0 then no limit
1282
     * 
1283
     * - encoding: set by user.
1284
     * - decoding: unused.
1285
     */
1286
    int me_range;
1287

    
1288
    /**
1289
     * frame_rate_base.
1290
     * for variable fps this is 1
1291
     * - encoding: set by user.
1292
     * - decoding: set by lavc.
1293
     * @todo move this after frame_rate
1294
     */
1295

    
1296
    int frame_rate_base;
1297
    /**
1298
     * intra quantizer bias.
1299
     * - encoding: set by user.
1300
     * - decoding: unused
1301
     */
1302
    int intra_quant_bias;
1303
#define FF_DEFAULT_QUANT_BIAS 999999
1304
    
1305
    /**
1306
     * inter quantizer bias.
1307
     * - encoding: set by user.
1308
     * - decoding: unused
1309
     */
1310
    int inter_quant_bias;
1311

    
1312
    /**
1313
     * color table ID.
1314
     * - encoding: unused.
1315
     * - decoding: which clrtable should be used for 8bit RGB images
1316
     *             table have to be stored somewhere FIXME
1317
     */
1318
    int color_table_id;
1319
    
1320
    /**
1321
     * internal_buffer count. 
1322
     * Dont touch, used by lavc default_get_buffer()
1323
     */
1324
    int internal_buffer_count;
1325
    
1326
    /**
1327
     * internal_buffers. 
1328
     * Dont touch, used by lavc default_get_buffer()
1329
     */
1330
    void *internal_buffer;
1331

    
1332
#define FF_LAMBDA_SHIFT 7
1333
#define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1334
#define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1335
#define FF_LAMBDA_MAX (256*128-1)
1336

    
1337
#define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1338
    /**
1339
     * global quality for codecs which cannot change it per frame.
1340
     * this should be proportional to MPEG1/2/4 qscale.
1341
     * - encoding: set by user.
1342
     * - decoding: unused
1343
     */
1344
    int global_quality;
1345
    
1346
#define FF_CODER_TYPE_VLC   0
1347
#define FF_CODER_TYPE_AC    1
1348
    /**
1349
     * coder type
1350
     * - encoding: set by user.
1351
     * - decoding: unused
1352
     */
1353
    int coder_type;
1354

    
1355
    /**
1356
     * context model
1357
     * - encoding: set by user.
1358
     * - decoding: unused
1359
     */
1360
    int context_model;
1361
    
1362
    /**
1363
     * slice flags
1364
     * - encoding: unused
1365
     * - decoding: set by user.
1366
     */
1367
    int slice_flags;
1368
#define SLICE_FLAG_CODED_ORDER    0x0001 ///< draw_horiz_band() is called in coded order instead of display
1369
#define SLICE_FLAG_ALLOW_FIELD    0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1370
#define SLICE_FLAG_ALLOW_PLANE    0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1371

    
1372
    /**
1373
     * XVideo Motion Acceleration
1374
     * - encoding: forbidden
1375
     * - decoding: set by decoder
1376
     */
1377
    int xvmc_acceleration;
1378
    
1379
    /**
1380
     * macroblock decision mode
1381
     * - encoding: set by user.
1382
     * - decoding: unused
1383
     */
1384
    int mb_decision;
1385
#define FF_MB_DECISION_SIMPLE 0        ///< uses mb_cmp
1386
#define FF_MB_DECISION_BITS   1        ///< chooses the one which needs the fewest bits
1387
#define FF_MB_DECISION_RD     2        ///< rate distoration
1388

    
1389
    /**
1390
     * custom intra quantization matrix
1391
     * - encoding: set by user, can be NULL
1392
     * - decoding: set by lavc
1393
     */
1394
    uint16_t *intra_matrix;
1395

    
1396
    /**
1397
     * custom inter quantization matrix
1398
     * - encoding: set by user, can be NULL
1399
     * - decoding: set by lavc
1400
     */
1401
    uint16_t *inter_matrix;
1402
    
1403
    /**
1404
     * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1405
     * this is used to workaround some encoder bugs
1406
     * - encoding: unused
1407
     * - decoding: set by user, will be converted to upper case by lavc during init
1408
     */
1409
    unsigned int stream_codec_tag;
1410

    
1411
    /**
1412
     * scene change detection threshold.
1413
     * 0 is default, larger means fewer detected scene changes
1414
     * - encoding: set by user.
1415
     * - decoding: unused
1416
     */
1417
    int scenechange_threshold;
1418

    
1419
    /**
1420
     * minimum lagrange multipler
1421
     * - encoding: set by user.
1422
     * - decoding: unused
1423
     */
1424
    int lmin;
1425

    
1426
    /**
1427
     * maximum lagrange multipler
1428
     * - encoding: set by user.
1429
     * - decoding: unused
1430
     */
1431
    int lmax;
1432

    
1433
    /**
1434
     * Palette control structure
1435
     * - encoding: ??? (no palette-enabled encoder yet)
1436
     * - decoding: set by user.
1437
     */
1438
    struct AVPaletteControl *palctrl;
1439

    
1440
    /**
1441
     * noise reduction strength
1442
     * - encoding: set by user.
1443
     * - decoding: unused
1444
     */
1445
    int noise_reduction;
1446
    
1447
    /**
1448
     * called at the beginning of a frame to get cr buffer for it.
1449
     * buffer type (size, hints) must be the same. lavc won't check it.
1450
     * lavc will pass previous buffer in pic, function should return
1451
     * same buffer or new buffer with old frame "painted" into it.
1452
     * if pic.data[0] == NULL must behave like get_buffer().
1453
     * - encoding: unused
1454
     * - decoding: set by lavc, user can override
1455
     */
1456
    int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1457

    
1458
    /**
1459
     * number of bits which should be loaded into the rc buffer before decoding starts
1460
     * - encoding: set by user.
1461
     * - decoding: unused
1462
     */
1463
    int rc_initial_buffer_occupancy;
1464

    
1465
    /**
1466
     *
1467
     * - encoding: set by user.
1468
     * - decoding: unused
1469
     */
1470
    int inter_threshold;
1471

    
1472
    /**
1473
     * CODEC_FLAG2_*.
1474
     * - encoding: set by user.
1475
     * - decoding: set by user.
1476
     */
1477
    int flags2;
1478

    
1479
    /**
1480
     * simulates errors in the bitstream to test error concealment.
1481
     * - encoding: set by user.
1482
     * - decoding: unused.
1483
     */
1484
    int error_rate;
1485
} AVCodecContext;
1486

    
1487

    
1488
/**
1489
 * AVOption.
1490
 */
1491
typedef struct AVOption {
1492
    /** options' name */
1493
    const char *name; /* if name is NULL, it indicates a link to next */
1494
    /** short English text help or const struct AVOption* subpointer */
1495
    const char *help; //        const struct AVOption* sub;
1496
    /** offset to context structure where the parsed value should be stored */
1497
    int offset;
1498
    /** options' type */
1499
    int type;
1500
#define FF_OPT_TYPE_BOOL 1      ///< boolean - true,1,on  (or simply presence)
1501
#define FF_OPT_TYPE_DOUBLE 2    ///< double
1502
#define FF_OPT_TYPE_INT 3       ///< integer
1503
#define FF_OPT_TYPE_STRING 4    ///< string (finished with \0)
1504
#define FF_OPT_TYPE_MASK 0x1f        ///< mask for types - upper bits are various flags
1505
//#define FF_OPT_TYPE_EXPERT 0x20 // flag for expert option
1506
#define FF_OPT_TYPE_FLAG (FF_OPT_TYPE_BOOL | 0x40)
1507
#define FF_OPT_TYPE_RCOVERRIDE (FF_OPT_TYPE_STRING | 0x80)
1508
    /** min value  (min == max   ->  no limits) */
1509
    double min;
1510
    /** maximum value for double/int */
1511
    double max;
1512
    /** default boo [0,1]l/double/int value */
1513
    double defval;
1514
    /**
1515
     * default string value (with optional semicolon delimited extra option-list
1516
     * i.e.   option1;option2;option3
1517
     * defval might select other then first argument as default
1518
     */
1519
    const char *defstr;
1520
#define FF_OPT_MAX_DEPTH 10
1521
} AVOption;
1522

    
1523
/**
1524
 * Parse option(s) and sets fields in passed structure
1525
 * @param strct        structure where the parsed results will be written
1526
 * @param list  list with AVOptions
1527
 * @param opts        string with options for parsing
1528
 */
1529
int avoption_parse(void* strct, const AVOption* list, const char* opts);
1530

    
1531

    
1532
/**
1533
 * AVCodec.
1534
 */
1535
typedef struct AVCodec {
1536
    const char *name;
1537
    enum CodecType type;
1538
    int id;
1539
    int priv_data_size;
1540
    int (*init)(AVCodecContext *);
1541
    int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
1542
    int (*close)(AVCodecContext *);
1543
    int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
1544
                  uint8_t *buf, int buf_size);
1545
    int capabilities;
1546
    const AVOption *options;
1547
    struct AVCodec *next;
1548
    void (*flush)(AVCodecContext *);
1549
} AVCodec;
1550

    
1551
/**
1552
 * four components are given, that's all.
1553
 * the last component is alpha
1554
 */
1555
typedef struct AVPicture {
1556
    uint8_t *data[4];
1557
    int linesize[4];       ///< number of bytes per line
1558
} AVPicture;
1559

    
1560
/**
1561
 * AVPaletteControl
1562
 * This structure defines a method for communicating palette changes
1563
 * between and demuxer and a decoder.
1564
 */
1565
#define AVPALETTE_SIZE 1024
1566
#define AVPALETTE_COUNT 256
1567
typedef struct AVPaletteControl {
1568

    
1569
    /* demuxer sets this to 1 to indicate the palette has changed;
1570
     * decoder resets to 0 */
1571
    int palette_changed;
1572

    
1573
    /* 4-byte ARGB palette entries, stored in native byte order; note that
1574
     * the individual palette components should be on a 8-bit scale; if
1575
     * the palette data comes from a IBM VGA native format, the component
1576
     * data is probably 6 bits in size and needs to be scaled */
1577
    unsigned int palette[AVPALETTE_COUNT];
1578

    
1579
} AVPaletteControl;
1580

    
1581
extern AVCodec ac3_encoder;
1582
extern AVCodec mp2_encoder;
1583
extern AVCodec mp3lame_encoder;
1584
extern AVCodec oggvorbis_encoder;
1585
extern AVCodec faac_encoder;
1586
extern AVCodec mpeg1video_encoder;
1587
extern AVCodec mpeg2video_encoder;
1588
extern AVCodec h263_encoder;
1589
extern AVCodec h263p_encoder;
1590
extern AVCodec flv_encoder;
1591
extern AVCodec rv10_encoder;
1592
extern AVCodec rv20_encoder;
1593
extern AVCodec mjpeg_encoder;
1594
extern AVCodec ljpeg_encoder;
1595
extern AVCodec mpeg4_encoder;
1596
extern AVCodec msmpeg4v1_encoder;
1597
extern AVCodec msmpeg4v2_encoder;
1598
extern AVCodec msmpeg4v3_encoder;
1599
extern AVCodec wmv1_encoder;
1600
extern AVCodec wmv2_encoder;
1601
extern AVCodec huffyuv_encoder;
1602
extern AVCodec h264_encoder;
1603
extern AVCodec asv1_encoder;
1604
extern AVCodec asv2_encoder;
1605
extern AVCodec vcr1_encoder;
1606
extern AVCodec ffv1_encoder;
1607
extern AVCodec mdec_encoder;
1608

    
1609
extern AVCodec h263_decoder;
1610
extern AVCodec mpeg4_decoder;
1611
extern AVCodec msmpeg4v1_decoder;
1612
extern AVCodec msmpeg4v2_decoder;
1613
extern AVCodec msmpeg4v3_decoder;
1614
extern AVCodec wmv1_decoder;
1615
extern AVCodec wmv2_decoder;
1616
extern AVCodec mpeg1video_decoder;
1617
extern AVCodec mpeg2video_decoder;
1618
extern AVCodec mpegvideo_decoder;
1619
extern AVCodec mpeg_xvmc_decoder;
1620
extern AVCodec h263i_decoder;
1621
extern AVCodec flv_decoder;
1622
extern AVCodec rv10_decoder;
1623
extern AVCodec rv20_decoder;
1624
extern AVCodec svq1_decoder;
1625
extern AVCodec svq3_decoder;
1626
extern AVCodec dvvideo_decoder;
1627
extern AVCodec wmav1_decoder;
1628
extern AVCodec wmav2_decoder;
1629
extern AVCodec mjpeg_decoder;
1630
extern AVCodec mjpegb_decoder;
1631
extern AVCodec sp5x_decoder;
1632
extern AVCodec mp2_decoder;
1633
extern AVCodec mp3_decoder;
1634
extern AVCodec mace3_decoder;
1635
extern AVCodec mace6_decoder;
1636
extern AVCodec huffyuv_decoder;
1637
extern AVCodec oggvorbis_decoder;
1638
extern AVCodec cyuv_decoder;
1639
extern AVCodec h264_decoder;
1640
extern AVCodec indeo3_decoder;
1641
extern AVCodec vp3_decoder;
1642
extern AVCodec theora_decoder;
1643
extern AVCodec amr_nb_decoder;
1644
extern AVCodec amr_nb_encoder;
1645
extern AVCodec amr_wb_encoder;
1646
extern AVCodec amr_wb_decoder;
1647
extern AVCodec aac_decoder;
1648
extern AVCodec mpeg4aac_decoder;
1649
extern AVCodec asv1_decoder;
1650
extern AVCodec asv2_decoder;
1651
extern AVCodec vcr1_decoder;
1652
extern AVCodec cljr_decoder;
1653
extern AVCodec ffv1_decoder;
1654
extern AVCodec fourxm_decoder;
1655
extern AVCodec mdec_decoder;
1656
extern AVCodec roq_decoder;
1657
extern AVCodec interplay_video_decoder;
1658
extern AVCodec xan_wc3_decoder;
1659
extern AVCodec rpza_decoder;
1660
extern AVCodec cinepak_decoder;
1661
extern AVCodec msrle_decoder;
1662
extern AVCodec msvideo1_decoder;
1663
extern AVCodec vqa_decoder;
1664
extern AVCodec idcin_decoder;
1665
extern AVCodec eightbps_decoder;
1666
extern AVCodec smc_decoder;
1667
extern AVCodec flic_decoder;
1668
extern AVCodec vmdvideo_decoder;
1669
extern AVCodec vmdaudio_decoder;
1670
extern AVCodec truemotion1_decoder;
1671
extern AVCodec ra_144_decoder;
1672
extern AVCodec ra_288_decoder;
1673
extern AVCodec roq_dpcm_decoder;
1674
extern AVCodec interplay_dpcm_decoder;
1675
extern AVCodec xan_dpcm_decoder;
1676

    
1677
/* pcm codecs */
1678
#define PCM_CODEC(id, name) \
1679
extern AVCodec name ## _decoder; \
1680
extern AVCodec name ## _encoder
1681

    
1682
PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
1683
PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
1684
PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
1685
PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
1686
PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
1687
PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
1688
PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
1689
PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
1690

    
1691
/* adpcm codecs */
1692

    
1693
PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
1694
PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
1695
PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
1696
PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
1697
PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
1698
PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
1699
PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
1700
PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
1701
PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
1702

    
1703
#undef PCM_CODEC
1704

    
1705
/* dummy raw video codec */
1706
extern AVCodec rawvideo_encoder;
1707
extern AVCodec rawvideo_decoder;
1708

    
1709
/* the following codecs use external GPL libs */
1710
extern AVCodec ac3_decoder;
1711

    
1712
/* resample.c */
1713

    
1714
struct ReSampleContext;
1715

    
1716
typedef struct ReSampleContext ReSampleContext;
1717

    
1718
ReSampleContext *audio_resample_init(int output_channels, int input_channels, 
1719
                                     int output_rate, int input_rate);
1720
int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
1721
void audio_resample_close(ReSampleContext *s);
1722

    
1723
/* YUV420 format is assumed ! */
1724

    
1725
struct ImgReSampleContext;
1726

    
1727
typedef struct ImgReSampleContext ImgReSampleContext;
1728

    
1729
ImgReSampleContext *img_resample_init(int output_width, int output_height,
1730
                                      int input_width, int input_height);
1731

    
1732
ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
1733
                                      int iwidth, int iheight,
1734
                                      int topBand, int bottomBand,
1735
                                      int leftBand, int rightBand);
1736

    
1737
void img_resample(ImgReSampleContext *s, 
1738
                  AVPicture *output, const AVPicture *input);
1739

    
1740
void img_resample_close(ImgReSampleContext *s);
1741

    
1742
/**
1743
 * Allocate memory for a picture.  Call avpicture_free to free it.
1744
 *
1745
 * @param picture the picture to be filled in.
1746
 * @param pix_fmt the format of the picture.
1747
 * @param width the width of the picture.
1748
 * @param height the height of the picture.
1749
 * @return 0 if successful, -1 if not.
1750
 */
1751
int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
1752

    
1753
/* Free a picture previously allocated by avpicture_alloc. */
1754
void avpicture_free(AVPicture *picture);
1755

    
1756
int avpicture_fill(AVPicture *picture, uint8_t *ptr,
1757
                   int pix_fmt, int width, int height);
1758
int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
1759
                     unsigned char *dest, int dest_size);
1760
int avpicture_get_size(int pix_fmt, int width, int height);
1761
void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
1762
const char *avcodec_get_pix_fmt_name(int pix_fmt);
1763
enum PixelFormat avcodec_get_pix_fmt(const char* name);
1764

    
1765
#define FF_LOSS_RESOLUTION  0x0001 /* loss due to resolution change */
1766
#define FF_LOSS_DEPTH       0x0002 /* loss due to color depth change */
1767
#define FF_LOSS_COLORSPACE  0x0004 /* loss due to color space conversion */
1768
#define FF_LOSS_ALPHA       0x0008 /* loss of alpha bits */
1769
#define FF_LOSS_COLORQUANT  0x0010 /* loss due to color quantization */
1770
#define FF_LOSS_CHROMA      0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
1771

    
1772
int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
1773
                             int has_alpha);
1774
int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
1775
                              int has_alpha, int *loss_ptr);
1776

    
1777
#define FF_ALPHA_TRANSP       0x0001 /* image has some totally transparent pixels */
1778
#define FF_ALPHA_SEMI_TRANSP  0x0002 /* image has some transparent pixels */
1779
int img_get_alpha_info(const AVPicture *src,
1780
                       int pix_fmt, int width, int height);
1781

    
1782
/* convert among pixel formats */
1783
int img_convert(AVPicture *dst, int dst_pix_fmt,
1784
                const AVPicture *src, int pix_fmt, 
1785
                int width, int height);
1786

    
1787
/* deinterlace a picture */
1788
int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
1789
                          int pix_fmt, int width, int height);
1790

    
1791
/* external high level API */
1792

    
1793
extern AVCodec *first_avcodec;
1794

    
1795
/* returns LIBAVCODEC_VERSION_INT constant */
1796
unsigned avcodec_version(void);
1797
/* returns LIBAVCODEC_BUILD constant */
1798
unsigned avcodec_build(void);
1799
void avcodec_init(void);
1800

    
1801
void register_avcodec(AVCodec *format);
1802
AVCodec *avcodec_find_encoder(enum CodecID id);
1803
AVCodec *avcodec_find_encoder_by_name(const char *name);
1804
AVCodec *avcodec_find_decoder(enum CodecID id);
1805
AVCodec *avcodec_find_decoder_by_name(const char *name);
1806
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
1807

    
1808
void avcodec_get_context_defaults(AVCodecContext *s);
1809
AVCodecContext *avcodec_alloc_context(void);
1810
AVFrame *avcodec_alloc_frame(void);
1811

    
1812
int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
1813
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
1814
void avcodec_default_free_buffers(AVCodecContext *s);
1815

    
1816
/**
1817
 * opens / inits the AVCodecContext.
1818
 * not thread save!
1819
 */
1820
int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
1821

    
1822
int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples, 
1823
                         int *frame_size_ptr,
1824
                         uint8_t *buf, int buf_size);
1825
int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture, 
1826
                         int *got_picture_ptr,
1827
                         uint8_t *buf, int buf_size);
1828
int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata, 
1829
                        int *data_size_ptr,
1830
                        uint8_t *buf, int buf_size);
1831
int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size, 
1832
                         const short *samples);
1833
int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size, 
1834
                         const AVFrame *pict);
1835

    
1836
int avcodec_close(AVCodecContext *avctx);
1837

    
1838
void avcodec_register_all(void);
1839

    
1840
void avcodec_flush_buffers(AVCodecContext *avctx);
1841

    
1842
/* misc usefull functions */
1843

    
1844
/**
1845
 * returns a single letter to describe the picture type
1846
 */
1847
char av_get_pict_type_char(int pict_type);
1848

    
1849
/**
1850
 * reduce a fraction.
1851
 * this is usefull for framerate calculations
1852
 * @param max the maximum allowed for dst_nom & dst_den
1853
 * @return 1 if exact, 0 otherwise
1854
 */
1855
int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max);
1856

    
1857
/**
1858
 * rescale a 64bit integer.
1859
 * a simple a*b/c isnt possible as it can overflow
1860
 */
1861
int64_t av_rescale(int64_t a, int b, int c);
1862

    
1863

    
1864
/**
1865
 * Interface for 0.5.0 version
1866
 *
1867
 * do not even think about it's usage for this moment
1868
 */
1869

    
1870
typedef struct {
1871
    /// compressed size used from given memory buffer
1872
    int size;
1873
    /// I/P/B frame type
1874
    int frame_type;
1875
} avc_enc_result_t;
1876

    
1877
/**
1878
 * Commands
1879
 * order can't be changed - once it was defined
1880
 */
1881
typedef enum {
1882
    // general commands
1883
    AVC_OPEN_BY_NAME = 0xACA000,
1884
    AVC_OPEN_BY_CODEC_ID,
1885
    AVC_OPEN_BY_FOURCC,
1886
    AVC_CLOSE,
1887

    
1888
    AVC_FLUSH,
1889
    // pin - struct { uint8_t* src, uint_t src_size }
1890
    // pout - struct { AVPicture* img, consumed_bytes,
1891
    AVC_DECODE,
1892
    // pin - struct { AVPicture* img, uint8_t* dest, uint_t dest_size }
1893
    // pout - uint_t used_from_dest_size
1894
    AVC_ENCODE, 
1895

    
1896
    // query/get video commands
1897
    AVC_GET_VERSION = 0xACB000,
1898
    AVC_GET_WIDTH,
1899
    AVC_GET_HEIGHT,
1900
    AVC_GET_DELAY,
1901
    AVC_GET_QUANT_TABLE,
1902
    // ...
1903

    
1904
    // query/get audio commands
1905
    AVC_GET_FRAME_SIZE = 0xABC000,
1906

    
1907
    // maybe define some simple structure which
1908
    // might be passed to the user - but they can't
1909
    // contain any codec specific parts and these
1910
    // calls are usualy necessary only few times
1911

    
1912
    // set video commands
1913
    AVC_SET_WIDTH = 0xACD000,
1914
    AVC_SET_HEIGHT,
1915

    
1916
    // set video encoding commands
1917
    AVC_SET_FRAME_RATE = 0xACD800,
1918
    AVC_SET_QUALITY,
1919
    AVC_SET_HURRY_UP,
1920

    
1921
    // set audio commands
1922
    AVC_SET_SAMPLE_RATE = 0xACE000,
1923
    AVC_SET_CHANNELS,
1924

    
1925
} avc_cmd_t;
1926

    
1927
/**
1928
 * \param handle  allocated private structure by libavcodec
1929
 *                for initialization pass NULL - will be returned pout
1930
 *                user is supposed to know nothing about its structure
1931
 * \param cmd     type of operation to be performed
1932
 * \param pint    input parameter
1933
 * \param pout    output parameter
1934
 *
1935
 * \returns  command status - eventually for query command it might return
1936
 * integer resulting value
1937
 */
1938
int avcodec(void* handle, avc_cmd_t cmd, void* pin, void* pout);
1939

    
1940
/* frame parsing */
1941
typedef struct AVCodecParserContext {
1942
    void *priv_data;
1943
    struct AVCodecParser *parser;
1944
    int64_t frame_offset; /* offset of the current frame */
1945
    int64_t cur_offset; /* current offset 
1946
                           (incremented by each av_parser_parse()) */
1947
    int64_t last_frame_offset; /* offset of the last frame */
1948
    /* video info */
1949
    int pict_type; /* XXX: put it back in AVCodecContext */
1950
    int repeat_pict; /* XXX: put it back in AVCodecContext */
1951
    int64_t pts;     /* pts of the current frame */
1952
    int64_t dts;     /* dts of the current frame */
1953

    
1954
    /* private data */
1955
    int64_t last_pts;
1956
    int64_t last_dts;
1957

    
1958
#define AV_PARSER_PTS_NB 4
1959
    int cur_frame_start_index;
1960
    int64_t cur_frame_offset[AV_PARSER_PTS_NB];
1961
    int64_t cur_frame_pts[AV_PARSER_PTS_NB];
1962
    int64_t cur_frame_dts[AV_PARSER_PTS_NB];
1963
} AVCodecParserContext;
1964

    
1965
typedef struct AVCodecParser {
1966
    int codec_ids[3]; /* several codec IDs are permitted */
1967
    int priv_data_size;
1968
    int (*parser_init)(AVCodecParserContext *s);
1969
    int (*parser_parse)(AVCodecParserContext *s, 
1970
                        AVCodecContext *avctx,
1971
                        uint8_t **poutbuf, int *poutbuf_size, 
1972
                        const uint8_t *buf, int buf_size);
1973
    void (*parser_close)(AVCodecParserContext *s);
1974
    struct AVCodecParser *next;
1975
} AVCodecParser;
1976

    
1977
extern AVCodecParser *av_first_parser;
1978

    
1979
void av_register_codec_parser(AVCodecParser *parser);
1980
AVCodecParserContext *av_parser_init(int codec_id);
1981
int av_parser_parse(AVCodecParserContext *s, 
1982
                    AVCodecContext *avctx,
1983
                    uint8_t **poutbuf, int *poutbuf_size, 
1984
                    const uint8_t *buf, int buf_size,
1985
                    int64_t pts, int64_t dts);
1986
void av_parser_close(AVCodecParserContext *s);
1987

    
1988
extern AVCodecParser mpegvideo_parser;
1989
extern AVCodecParser mpeg4video_parser;
1990
extern AVCodecParser h263_parser;
1991
extern AVCodecParser h264_parser;
1992
extern AVCodecParser mpegaudio_parser;
1993
extern AVCodecParser ac3_parser;
1994

    
1995
/* memory */
1996
void *av_malloc(unsigned int size);
1997
void *av_mallocz(unsigned int size);
1998
void *av_realloc(void *ptr, unsigned int size);
1999
void av_free(void *ptr);
2000
char *av_strdup(const char *s);
2001
void __av_freep(void **ptr);
2002
#define av_freep(p) __av_freep((void **)(p))
2003
void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2004
/* for static data only */
2005
/* call av_free_static to release all staticaly allocated tables */
2006
void av_free_static(void);
2007
void *__av_mallocz_static(void** location, unsigned int size);
2008
#define av_mallocz_static(p, s) __av_mallocz_static((void **)(p), s)
2009

    
2010
/* add by bero : in adx.c */
2011
int is_adx(const unsigned char *buf,size_t bufsize);
2012

    
2013
void img_copy(AVPicture *dst, const AVPicture *src,
2014
              int pix_fmt, int width, int height);
2015

    
2016
/* av_log API */
2017

    
2018
#include <stdarg.h>
2019

    
2020
#define AV_LOG_ERROR 0
2021
#define AV_LOG_INFO 1
2022
#define AV_LOG_DEBUG 2
2023

    
2024
extern void av_log(AVCodecContext*, int level, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 3, 4)));
2025
extern void av_vlog(AVCodecContext*, int level, const char *fmt, va_list);
2026
extern int av_log_get_level(void);
2027
extern void av_log_set_level(int);
2028
extern void av_log_set_callback(void (*)(AVCodecContext*, int, const char*, va_list));
2029

    
2030
#undef  AV_LOG_TRAP_PRINTF
2031
#ifdef AV_LOG_TRAP_PRINTF
2032
#define printf DO NOT USE
2033
#define fprintf DO NOT USE
2034
#undef stderr
2035
#define stderr DO NOT USE
2036
#endif
2037

    
2038
#ifdef __cplusplus
2039
}
2040
#endif
2041

    
2042
#endif /* AVCODEC_H */