Statistics
| Branch: | Revision:

ffmpeg / libavcodec / avcodec.h @ e769f053

History | View | Annotate | Download (20 KB)

1
#ifndef AVCODEC_H
2
#define AVCODEC_H
3

    
4
#include "common.h"
5

    
6
#define LIBAVCODEC_VERSION_INT 0x000406
7
#define LIBAVCODEC_VERSION     "0.4.6"
8
#define LIBAVCODEC_BUILD       4620
9
#define LIBAVCODEC_BUILD_STR   "4620"
10

    
11
enum CodecID {
12
    CODEC_ID_NONE, 
13
    CODEC_ID_MPEG1VIDEO,
14
    CODEC_ID_H263,
15
    CODEC_ID_RV10,
16
    CODEC_ID_MP2,
17
    CODEC_ID_MP3LAME,
18
    CODEC_ID_AC3,
19
    CODEC_ID_MJPEG,
20
    CODEC_ID_MPEG4,
21
    CODEC_ID_RAWVIDEO,
22
    CODEC_ID_MSMPEG4V1,
23
    CODEC_ID_MSMPEG4V2,
24
    CODEC_ID_MSMPEG4V3,
25
    CODEC_ID_WMV1,
26
    CODEC_ID_WMV2,
27
    CODEC_ID_H263P,
28
    CODEC_ID_H263I,
29
    CODEC_ID_SVQ1,
30

    
31
    /* various pcm "codecs" */
32
    CODEC_ID_PCM_S16LE,
33
    CODEC_ID_PCM_S16BE,
34
    CODEC_ID_PCM_U16LE,
35
    CODEC_ID_PCM_U16BE,
36
    CODEC_ID_PCM_S8,
37
    CODEC_ID_PCM_U8,
38
    CODEC_ID_PCM_MULAW,
39
    CODEC_ID_PCM_ALAW,
40

    
41
    /* various adpcm codecs */
42
    CODEC_ID_ADPCM_IMA_QT,
43
    CODEC_ID_ADPCM_IMA_WAV,
44
    CODEC_ID_ADPCM_MS,
45
};
46
#define CODEC_ID_MSMPEG4 CODEC_ID_MSMPEG4V3
47

    
48
enum CodecType {
49
    CODEC_TYPE_UNKNOWN = -1,
50
    CODEC_TYPE_VIDEO,
51
    CODEC_TYPE_AUDIO,
52
};
53

    
54
enum PixelFormat {
55
    PIX_FMT_ANY = -1,
56
    PIX_FMT_YUV420P,
57
    PIX_FMT_YUV422,
58
    PIX_FMT_RGB24,
59
    PIX_FMT_BGR24,
60
    PIX_FMT_YUV422P,
61
    PIX_FMT_YUV444P,
62
    PIX_FMT_RGBA32,
63
    PIX_FMT_BGRA32,
64
    PIX_FMT_YUV410P
65
};
66

    
67
/* currently unused, may be used if 24/32 bits samples ever supported */
68
enum SampleFormat {
69
    SAMPLE_FMT_S16 = 0,         /* signed 16 bits */
70
};
71

    
72
/* in bytes */
73
#define AVCODEC_MAX_AUDIO_FRAME_SIZE 18432
74

    
75
/* motion estimation type, EPZS by default */
76
enum Motion_Est_ID {
77
    ME_ZERO = 1,
78
    ME_FULL,
79
    ME_LOG,
80
    ME_PHODS,
81
    ME_EPZS,
82
    ME_X1
83
};
84

    
85
typedef struct RcOverride{
86
    int start_frame;
87
    int end_frame;
88
    int qscale; // if this is 0 then quality_factor will be used instead
89
    float quality_factor;
90
} RcOverride;
91

    
92
/* only for ME compatiblity with old apps */
93
extern int motion_estimation_method;
94

    
95
/* ME algos sorted by quality */
96
static const int Motion_Est_QTab[] = { ME_ZERO, ME_PHODS, ME_LOG, 
97
                                       ME_X1, ME_EPZS, ME_FULL };
98

    
99
#define FF_MAX_B_FRAMES 4
100

    
101
/* encoding support */
102
/* note not everything is supported yet */
103

    
104
#define CODEC_FLAG_HQ     0x0001 /* high quality (non real time) encoding */
105
#define CODEC_FLAG_QSCALE 0x0002 /* use fixed qscale */
106
#define CODEC_FLAG_4MV    0x0004 /* 4 MV per MB allowed */
107
#define CODEC_FLAG_QPEL   0x0010 /* use qpel MC */
108
#define CODEC_FLAG_GMC    0x0020 /* use GMC */
109
#define CODEC_FLAG_TYPE   0x0040 /* fixed I/P frame type, from avctx->key_frame */
110
#define CODEC_FLAG_PART   0x0080 /* use data partitioning */
111
/* parent program gurantees that the input for b-frame containing streams is not written to 
112
   for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
113
#define CODEC_FLAG_INPUT_PRESERVED 0x0100
114
#define CODEC_FLAG_PASS1 0x0200  /* use internal 2pass ratecontrol in first  pass mode */
115
#define CODEC_FLAG_PASS2 0x0400  /* use internal 2pass ratecontrol in second pass mode */
116
#define CODEC_FLAG_EXTERN_HUFF 0x1000 /* use external huffman table (for mjpeg) */
117
#define CODEC_FLAG_GRAY  0x2000  /* only decode/encode grayscale */
118
#define CODEC_FLAG_EMU_EDGE 0x4000/* dont draw edges */
119
#define CODEC_FLAG_DR1    0x8000 /* dr1 */
120
/* codec capabilities */
121

    
122
/* decoder can use draw_horiz_band callback */
123
#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001
124
#define CODEC_CAP_DR1             0x0002 /* direct rendering method 1 */
125
/* if 'parse_only' field is true, then avcodec_parse_frame() can be
126
   used */
127
#define CODEC_CAP_PARSE_ONLY      0x0004
128

    
129
#define FRAME_RATE_BASE 10000
130

    
131
typedef struct AVCodecContext {
132
    int bit_rate;
133
    int bit_rate_tolerance; /* amount of +- bits (>0)*/
134
    int flags;
135
    int sub_id;    /* some codecs needs additionnal format info. It is
136
                      stored there */
137
    
138
    int me_method; /* ME algorithm used for video coding */
139
    
140
    /* extra data from parent application to codec, e.g. huffman table
141
       for mjpeg */
142
    /* the parent should allocate and free this buffer */
143
    void *extradata;
144
    int extradata_size;
145
    
146
    /* video only */
147
    int frame_rate; /* frames per sec multiplied by FRAME_RATE_BASE */
148
    int width, height;
149
    int aspect_ratio_info;
150
#define FF_ASPECT_SQUARE 1
151
#define FF_ASPECT_4_3_625 2
152
#define FF_ASPECT_4_3_525 3
153
#define FF_ASPECT_16_9_625 4
154
#define FF_ASPECT_16_9_525 5
155
#define FF_ASPECT_EXTENDED 15
156
    int gop_size; /* 0 = intra only */
157
    enum PixelFormat pix_fmt;  /* pixel format, see PIX_FMT_xxx */
158
    int repeat_pict; /* when decoding, this signal how much the picture */
159
                     /* must be delayed.                                */
160
                     /* extra_delay = (repeat_pict / 2) * (1/fps)       */
161
    /* if non NULL, 'draw_horiz_band' is called by the libavcodec
162
       decoder to draw an horizontal band. It improve cache usage. Not
163
       all codecs can do that. You must check the codec capabilities
164
       before */
165
    void (*draw_horiz_band)(struct AVCodecContext *s,
166
                            UINT8 **src_ptr, int linesize,
167
                            int y, int width, int height);
168

    
169
    /* audio only */
170
    int sample_rate; /* samples per sec */
171
    int channels;
172
    int sample_fmt;  /* sample format, currenly unused */
173

    
174
    /* the following data should not be initialized */
175
    int frame_size;     /* in samples, initialized when calling 'init' */
176
    int frame_number;   /* audio or video frame number */
177
    int real_pict_num;  /* returns the real picture number of
178
                           previous encoded frame */
179
    int key_frame;      /* true if the previous compressed frame was 
180
                           a key frame (intra, or seekable) */
181
    int pict_type;      /* picture type of the previous 
182
                           encoded frame */
183
/* FIXME: these should have FF_ */
184
#define I_TYPE 1 // Intra
185
#define P_TYPE 2 // Predicted
186
#define B_TYPE 3 // Bi-dir predicted
187
#define S_TYPE 4 // S(GMC)-VOP MPEG4
188

    
189
    int delay;          /* number of frames the decoded output 
190
                           will be delayed relative to the encoded input */
191
    uint8_t *mbskip_table; /* =1 if MB didnt change, is only valid for I/P frames 
192
                              stride= mb_width = (width+15)>>4 */
193
    
194
    /* encoding parameters */
195
    int quality;      /* quality of the previous encoded frame 
196
                         (between 1 (good) and 31 (bad)) 
197
                         this is allso used to set the quality in vbr mode
198
                         and the per frame quality in CODEC_FLAG_TYPE (second pass mode) */
199
    float qcompress;  /* amount of qscale change between easy & hard scenes (0.0-1.0)*/
200
    float qblur;      /* amount of qscale smoothing over time (0.0-1.0) */
201
    int qmin;         /* min qscale */
202
    int qmax;         /* max qscale */
203
    int max_qdiff;    /* max qscale difference between frames */
204
    int max_b_frames; /* maximum b frames, the output will be delayed by max_b_frames+1 relative to the input */
205
    float b_quant_factor;/* qscale factor between ps and b frames */
206
    int rc_strategy;  /* obsolete FIXME remove */
207
    int b_frame_strategy;
208

    
209
    int hurry_up;     /* when set to 1 during decoding, b frames will be skiped
210
                         when set to 2 idct/dequant will be skipped too */
211
    
212
    struct AVCodec *codec;
213
    void *priv_data;
214

    
215
    /* The following data is for RTP friendly coding */
216
    /* By now only H.263/H.263+/MPEG4 coder honours this   */
217
    int rtp_mode;   /* 1 for activate RTP friendly-mode           */
218
                    /* highers numbers represent more error-prone */
219
                    /* enviroments, by now just "1" exist         */
220
    
221
    int rtp_payload_size;   /* The size of the RTP payload, the coder will  */
222
                            /* do it's best to deliver a chunk with size    */
223
                            /* below rtp_payload_size, the chunk will start */
224
                            /* with a start code on some codecs like H.263  */
225
                            /* This doesn't take account of any particular  */
226
                            /* headers inside the transmited RTP payload    */
227

    
228
    
229
    /* The RTP callcack: This function is called  */
230
    /* every time the encoder as a packet to send */
231
    /* Depends on the encoder if the data starts  */
232
    /* with a Start Code (it should) H.263 does   */
233
    void (*rtp_callback)(void *data, int size, int packet_number); 
234

    
235
    /* These are for PSNR calculation, if you set get_psnr to 1 */
236
    /* after encoding you will have the PSNR on psnr_y/cb/cr    */
237
    int get_psnr;
238
    float psnr_y;
239
    float psnr_cb;
240
    float psnr_cr;
241
    
242
    /* statistics, used for 2-pass encoding */
243
    int mv_bits;
244
    int header_bits;
245
    int i_tex_bits;
246
    int p_tex_bits;
247
    int i_count;
248
    int p_count;
249
    int skip_count;
250
    int misc_bits; // cbp, mb_type
251
    int frame_bits;
252
                 
253
    /* the following fields are ignored */
254
    void *opaque;   /* can be used to carry app specific stuff */
255
    char codec_name[32];
256
    enum CodecType codec_type; /* see CODEC_TYPE_xxx */
257
    enum CodecID codec_id; /* see CODEC_ID_xxx */
258
    unsigned int codec_tag;  /* codec tag, only used if unknown codec */
259
    
260
    int workaround_bugs;       /* workaround bugs in encoders which cannot be detected automatically */
261
    int luma_elim_threshold;
262
    int chroma_elim_threshold;
263
    int strict_std_compliance; /* strictly follow the std (MPEG4, ...) */
264
    float b_quant_offset;/* qscale offset between ips and b frames, not implemented yet */
265
    int error_resilience;
266
    
267
#ifndef MBC
268
#define MBC 128
269
#define MBR 96
270
#endif
271
#define QP_TYPE int //FIXME note xxx this might be changed to int8_t
272

    
273
    QP_TYPE *quant_store; /* field for communicating with external postprocessing */
274

    
275
    unsigned qstride;
276
    uint8_t *dr_buffer[3];
277
    int dr_stride;
278
    void *dr_opaque_frame;
279
    void (*get_buffer_callback)(struct AVCodecContext *c, int width, int height, int pict_type);
280

    
281
    int has_b_frames; // is 1 if the decoded stream contains b frames
282
    int dr_uvstride;
283
    int dr_ip_buffer_count;
284
    int block_align; /* currently only for adpcm codec in wav/avi */
285
    
286
    int parse_only; /* decoding only: if true, only parsing is done
287
                       (function avcodec_parse_frame()). The frame
288
                       data is returned. Only MPEG codecs support this now. */
289
    
290
    int mpeg_quant; /* 0-> h263 quant 1-> mpeg quant */
291
    
292
    char *stats_out; /* encoding statistics output buffer */
293
    char *stats_in;  /* encoding statistics input buffer (concatenated stuff from stats_out of pass1 should be placed here)*/
294
    float rc_qsquish;
295
    float rc_qmod_amp;
296
    int rc_qmod_freq;
297
    RcOverride *rc_override;
298
    int rc_override_count;
299
    char *rc_eq;
300
    int rc_max_rate;
301
    int rc_min_rate;
302
    int rc_buffer_size;
303
    float rc_buffer_aggressivity;
304
    float i_quant_factor;/* qscale factor between i and p frames */
305
    float i_quant_offset;/* qscale offset between i and p frames */
306
    float rc_initial_cplx;
307

    
308
    int aspected_width;
309
    int aspected_height;
310

    
311
    //FIXME this should be reordered after kabis API is finished ...
312
    //TODO kill kabi
313
    /*
314
        Note: Below are located reserved fields for further usage
315
        It requires for ABI !!!
316
        If you'll perform some changes then borrow new space from these fields
317
        (void * can be safety replaced with struct * ;)
318
        P L E A S E ! ! !
319
        IMPORTANT: Never change order of already declared fields!!!
320
    */
321
    unsigned long long int
322
            ull_res0,ull_res1,ull_res2,ull_res3,ull_res4,ull_res5,
323
            ull_res6,ull_res7,ull_res8,ull_res9,ull_res10,ull_res11,ull_res12;
324
    float
325
            flt_res0,flt_res1,flt_res2,flt_res3,flt_res4,flt_res5,
326
            flt_res6,flt_res7,flt_res8,flt_res9,flt_res10,flt_res11,flt_res12;
327
    void
328
            *ptr_res0,*ptr_res1,*ptr_res2,*ptr_res3,*ptr_res4,*ptr_res5,
329
            *ptr_res6,*ptr_res7,*ptr_res8,*ptr_res9,*ptr_res10,*ptr_res11,*ptr_res12;
330
    unsigned long int
331
            ul_res0,ul_res1,ul_res2,ul_res3,ul_res4,ul_res5,
332
            ul_res6,ul_res7,ul_res8,ul_res9,ul_res10,ul_res11,ul_res12;
333
    unsigned short int
334
            us_res0,us_res1,us_res2,us_res3,us_res4,us_res5,
335
            us_res6,us_res7,us_res8,us_res9,us_res10,us_res11,us_res12;
336
    unsigned char
337
            uc_res0,uc_res1,uc_res2,uc_res3,uc_res4,uc_res5,
338
            uc_res6,uc_res7,uc_res8,uc_res9,uc_res10,uc_res11,uc_res12;
339
    unsigned int
340
            ui_res0,ui_res1,ui_res2,ui_res3,ui_res4,ui_res5,ui_res6,ui_res7,ui_res8,ui_res9,
341
            ui_res10,ui_res11,ui_res12,ui_res13,ui_res14,ui_res15,ui_res16,ui_res17;
342
} AVCodecContext;
343

    
344
typedef struct AVCodec {
345
    char *name;
346
    int type;
347
    int id;
348
    int priv_data_size;
349
    int (*init)(AVCodecContext *);
350
    int (*encode)(AVCodecContext *, UINT8 *buf, int buf_size, void *data);
351
    int (*close)(AVCodecContext *);
352
    int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
353
                  UINT8 *buf, int buf_size);
354
    int capabilities;
355
    struct AVCodec *next;
356
    /*
357
        Note: Below are located reserved fields for further usage
358
        It requires for ABI !!!
359
        If you'll perform some changes then borrow new space from these fields
360
        (void * can be safety replaced with struct * ;)
361
        P L E A S E ! ! !
362
        IMPORTANT: Never change order of already declared fields!!!
363
    */
364
    unsigned long long int
365
            ull_res0,ull_res1,ull_res2,ull_res3,ull_res4,ull_res5,
366
            ull_res6,ull_res7,ull_res8,ull_res9,ull_res10,ull_res11,ull_res12;
367
    float
368
            flt_res0,flt_res1,flt_res2,flt_res3,flt_res4,flt_res5,
369
            flt_res6,flt_res7,flt_res8,flt_res9,flt_res10,flt_res11,flt_res12;
370
    void
371
            *ptr_res0,*ptr_res1,*ptr_res2,*ptr_res3,*ptr_res4,*ptr_res5,
372
            *ptr_res6,*ptr_res7,*ptr_res8,*ptr_res9,*ptr_res10,*ptr_res11,*ptr_res12;
373
} AVCodec;
374

    
375
/* three components are given, that's all */
376
typedef struct AVPicture {
377
    UINT8 *data[3];
378
    int linesize[3];
379
} AVPicture;
380

    
381
extern AVCodec ac3_encoder;
382
extern AVCodec mp2_encoder;
383
extern AVCodec mp3lame_encoder;
384
extern AVCodec mpeg1video_encoder;
385
extern AVCodec h263_encoder;
386
extern AVCodec h263p_encoder;
387
extern AVCodec rv10_encoder;
388
extern AVCodec mjpeg_encoder;
389
extern AVCodec mpeg4_encoder;
390
extern AVCodec msmpeg4v1_encoder;
391
extern AVCodec msmpeg4v2_encoder;
392
extern AVCodec msmpeg4v3_encoder;
393
extern AVCodec wmv1_encoder;
394
extern AVCodec wmv2_encoder;
395

    
396
extern AVCodec h263_decoder;
397
extern AVCodec mpeg4_decoder;
398
extern AVCodec msmpeg4v1_decoder;
399
extern AVCodec msmpeg4v2_decoder;
400
extern AVCodec msmpeg4v3_decoder;
401
extern AVCodec wmv1_decoder;
402
extern AVCodec wmv2_decoder;
403
extern AVCodec mpeg_decoder;
404
extern AVCodec h263i_decoder;
405
extern AVCodec rv10_decoder;
406
extern AVCodec svq1_decoder;
407
extern AVCodec mjpeg_decoder;
408
extern AVCodec mp2_decoder;
409
extern AVCodec mp3_decoder;
410

    
411
/* pcm codecs */
412
#define PCM_CODEC(id, name) \
413
extern AVCodec name ## _decoder; \
414
extern AVCodec name ## _encoder;
415

    
416
PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
417
PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
418
PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
419
PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
420
PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
421
PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
422
PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
423
PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
424

    
425
/* adpcm codecs */
426

    
427
PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
428
PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
429
PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
430

    
431
#undef PCM_CODEC
432

    
433
/* dummy raw video codec */
434
extern AVCodec rawvideo_codec;
435

    
436
/* the following codecs use external GPL libs */
437
extern AVCodec ac3_decoder;
438

    
439
/* resample.c */
440

    
441
struct ReSampleContext;
442

    
443
typedef struct ReSampleContext ReSampleContext;
444

    
445
ReSampleContext *audio_resample_init(int output_channels, int input_channels, 
446
                                     int output_rate, int input_rate);
447
int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
448
void audio_resample_close(ReSampleContext *s);
449

    
450
/* YUV420 format is assumed ! */
451

    
452
struct ImgReSampleContext;
453

    
454
typedef struct ImgReSampleContext ImgReSampleContext;
455

    
456
ImgReSampleContext *img_resample_init(int output_width, int output_height,
457
                                      int input_width, int input_height);
458
void img_resample(ImgReSampleContext *s, 
459
                  AVPicture *output, AVPicture *input);
460

    
461
void img_resample_close(ImgReSampleContext *s);
462

    
463
void avpicture_fill(AVPicture *picture, UINT8 *ptr,
464
                    int pix_fmt, int width, int height);
465
int avpicture_get_size(int pix_fmt, int width, int height);
466

    
467
/* convert among pixel formats */
468
int img_convert(AVPicture *dst, int dst_pix_fmt,
469
                AVPicture *src, int pix_fmt, 
470
                int width, int height);
471

    
472
/* deinterlace a picture */
473
int avpicture_deinterlace(AVPicture *dst, AVPicture *src,
474
                          int pix_fmt, int width, int height);
475

    
476
/* external high level API */
477

    
478
extern AVCodec *first_avcodec;
479

    
480
/* returns LIBAVCODEC_VERSION_INT constant */
481
unsigned avcodec_version(void);
482
/* returns LIBAVCODEC_BUILD constant */
483
unsigned avcodec_build(void);
484
void avcodec_init(void);
485

    
486
void avcodec_set_bit_exact(void);
487

    
488
void register_avcodec(AVCodec *format);
489
AVCodec *avcodec_find_encoder(enum CodecID id);
490
AVCodec *avcodec_find_encoder_by_name(const char *name);
491
AVCodec *avcodec_find_decoder(enum CodecID id);
492
AVCodec *avcodec_find_decoder_by_name(const char *name);
493
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
494

    
495
int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
496
int avcodec_decode_audio(AVCodecContext *avctx, INT16 *samples, 
497
                         int *frame_size_ptr,
498
                         UINT8 *buf, int buf_size);
499
int avcodec_decode_video(AVCodecContext *avctx, AVPicture *picture, 
500
                         int *got_picture_ptr,
501
                         UINT8 *buf, int buf_size);
502
int avcodec_parse_frame(AVCodecContext *avctx, UINT8 **pdata, 
503
                        int *data_size_ptr,
504
                        UINT8 *buf, int buf_size);
505
int avcodec_encode_audio(AVCodecContext *avctx, UINT8 *buf, int buf_size, 
506
                         const short *samples);
507
int avcodec_encode_video(AVCodecContext *avctx, UINT8 *buf, int buf_size, 
508
                         const AVPicture *pict);
509

    
510
int avcodec_close(AVCodecContext *avctx);
511

    
512
void avcodec_register_all(void);
513

    
514
void avcodec_flush_buffers(AVCodecContext *avctx);
515

    
516
#ifdef FF_POSTPROCESS
517
extern int quant_store[MBR+1][MBC+1]; // [Review]
518
#endif
519

    
520

    
521
/**
522
 * Interface for 0.5.0 version
523
 *
524
 * do not even think about it's usage for this moment
525
 */
526

    
527
typedef struct {
528
    // compressed size used from given memory buffer
529
    int size;
530
    /// I/P/B frame type
531
    int frame_type;
532
} avc_enc_result_t;
533

    
534
/**
535
 * Commands
536
 * order can't be changed - once it was defined
537
 */
538
typedef enum {
539
    // general commands
540
    AVC_OPEN_BY_NAME = 0xACA000,
541
    AVC_OPEN_BY_CODEC_ID,
542
    AVC_OPEN_BY_FOURCC,
543
    AVC_CLOSE,
544

    
545
    AVC_FLUSH,
546
    // pin - struct { uint8_t* src, uint_t src_size }
547
    // pout - struct { AVPicture* img, consumed_bytes,
548
    AVC_DECODE,
549
    // pin - struct { AVPicture* img, uint8_t* dest, uint_t dest_size }
550
    // pout - uint_t used_from_dest_size
551
    AVC_ENCODE, 
552

    
553
    // query/get video commands
554
    AVC_GET_VERSION = 0xACB000,
555
    AVC_GET_WIDTH,
556
    AVC_GET_HEIGHT,
557
    AVC_GET_DELAY,
558
    AVC_GET_QUANT_TABLE,
559
    // ...
560

    
561
    // query/get audio commands
562
    AVC_GET_FRAME_SIZE = 0xABC000,
563

    
564
    // maybe define some simple structure which
565
    // might be passed to the user - but they can't
566
    // contain any codec specific parts and these
567
    // calls are usualy necessary only few times
568

    
569
    // set video commands
570
    AVC_SET_WIDTH = 0xACD000,
571
    AVC_SET_HEIGHT,
572

    
573
    // set video encoding commands
574
    AVC_SET_FRAME_RATE = 0xACD800,
575
    AVC_SET_QUALITY,
576
    AVC_SET_HURRY_UP,
577

    
578
    // set audio commands
579
    AVC_SET_SAMPLE_RATE = 0xACE000,
580
    AVC_SET_CHANNELS,
581

    
582
} avc_cmd_t;
583

    
584
/**
585
 * \param handle  allocated private structure by libavcodec
586
 *                for initialization pass NULL - will be returned pout
587
 *                user is supposed to know nothing about its structure
588
 * \param cmd     type of operation to be performed
589
 * \param pint    input parameter
590
 * \param pout    output parameter
591
 *
592
 * \returns  command status - eventually for query command it might return
593
 * integer resulting value
594
 */
595
int avcodec(void* handle, avc_cmd_t cmd, void* pin, void* pout);
596

    
597
/* memory */
598
void *av_malloc(int size);
599
void *av_mallocz(int size);
600
void av_free(void *ptr);
601
void __av_freep(void **ptr);
602
#define av_freep(p) __av_freep((void **)(p))
603

    
604
#endif /* AVCODEC_H */