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1
/*
2
 * utils for libavcodec
3
 * Copyright (c) 2001 Fabrice Bellard.
4
 *
5
 * This library is free software; you can redistribute it and/or
6
 * modify it under the terms of the GNU Lesser General Public
7
 * License as published by the Free Software Foundation; either
8
 * version 2 of the License, or (at your option) any later version.
9
 *
10
 * This library is distributed in the hope that it will be useful,
11
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13
 * Lesser General Public License for more details.
14
 *
15
 * You should have received a copy of the GNU Lesser General Public
16
 * License along with this library; if not, write to the Free Software
17
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
18
 */
19
 
20
/**
21
 * @file utils.c
22
 * utils.
23
 */
24
 
25
#include "avcodec.h"
26
#include "dsputil.h"
27
#include "mpegvideo.h"
28

    
29
void *av_mallocz(unsigned int size)
30
{
31
    void *ptr;
32
    
33
    ptr = av_malloc(size);
34
    if (!ptr)
35
        return NULL;
36
    memset(ptr, 0, size);
37
    return ptr;
38
}
39

    
40
char *av_strdup(const char *s)
41
{
42
    char *ptr;
43
    int len;
44
    len = strlen(s) + 1;
45
    ptr = av_malloc(len);
46
    if (!ptr)
47
        return NULL;
48
    memcpy(ptr, s, len);
49
    return ptr;
50
}
51

    
52
/**
53
 * realloc which does nothing if the block is large enough
54
 */
55
void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size)
56
{
57
    if(min_size < *size) 
58
        return ptr;
59
    
60
    *size= min_size + 10*1024;
61

    
62
    return av_realloc(ptr, *size);
63
}
64

    
65

    
66
/* allocation of static arrays - do not use for normal allocation */
67
static unsigned int last_static = 0;
68
static char*** array_static = NULL;
69
static const unsigned int grow_static = 64; // ^2
70
void *__av_mallocz_static(void** location, unsigned int size)
71
{
72
    unsigned int l = (last_static + grow_static) & ~(grow_static - 1);
73
    void *ptr = av_mallocz(size);
74
    if (!ptr)
75
        return NULL;
76

    
77
    if (location)
78
    {
79
        if (l > last_static)
80
            array_static = av_realloc(array_static, l);
81
        array_static[last_static++] = (char**) location;
82
        *location = ptr;
83
    }
84
    return ptr;
85
}
86
/* free all static arrays and reset pointers to 0 */
87
void av_free_static()
88
{
89
    if (array_static)
90
    {
91
        unsigned i;
92
        for (i = 0; i < last_static; i++)
93
        {
94
            av_free(*array_static[i]);
95
            *array_static[i] = NULL;
96
        }
97
        av_free(array_static);
98
        array_static = 0;
99
    }
100
    last_static = 0;
101
}
102

    
103
/* cannot call it directly because of 'void **' casting is not automatic */
104
void __av_freep(void **ptr)
105
{
106
    av_free(*ptr);
107
    *ptr = NULL;
108
}
109

    
110
/* encoder management */
111
AVCodec *first_avcodec;
112

    
113
void register_avcodec(AVCodec *format)
114
{
115
    AVCodec **p;
116
    p = &first_avcodec;
117
    while (*p != NULL) p = &(*p)->next;
118
    *p = format;
119
    format->next = NULL;
120
}
121

    
122
typedef struct DefaultPicOpaque{
123
    int last_pic_num;
124
    uint8_t *data[4];
125
}DefaultPicOpaque;
126

    
127
int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
128
    int i;
129
    const int width = s->width;
130
    const int height= s->height;
131
    DefaultPicOpaque *opaque;
132
    
133
    assert(pic->data[0]==NULL);
134
    assert(pic->type==0 || pic->type==FF_TYPE_INTERNAL);
135

    
136
    if(pic->opaque){
137
        opaque= (DefaultPicOpaque *)pic->opaque;
138
        for(i=0; i<3; i++)
139
            pic->data[i]= opaque->data[i];
140

    
141
//    printf("get_buffer %X coded_pic_num:%d last:%d\n", pic->opaque, pic->coded_picture_number, opaque->last_pic_num);    
142
        pic->age= pic->coded_picture_number - opaque->last_pic_num;
143
        opaque->last_pic_num= pic->coded_picture_number;
144
//printf("age: %d %d %d\n", pic->age, c->picture_number, pic->coded_picture_number);
145
    }else{
146
        int align, h_chroma_shift, v_chroma_shift;
147
        int w, h, pixel_size;
148
        
149
        avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
150
        
151
        switch(s->pix_fmt){
152
        case PIX_FMT_YUV422:
153
            pixel_size=2;
154
            break;
155
        case PIX_FMT_RGB24:
156
        case PIX_FMT_BGR24:
157
            pixel_size=3;
158
            break;
159
        case PIX_FMT_RGBA32:
160
            pixel_size=4;
161
            break;
162
        default:
163
            pixel_size=1;
164
        }
165
        
166
        if(s->codec_id==CODEC_ID_SVQ1) align=63;
167
        else                           align=15;
168
    
169
        w= (width +align)&~align;
170
        h= (height+align)&~align;
171
    
172
        if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
173
            w+= EDGE_WIDTH*2;
174
            h+= EDGE_WIDTH*2;
175
        }
176
        
177
        opaque= av_mallocz(sizeof(DefaultPicOpaque));
178
        if(opaque==NULL) return -1;
179

    
180
        pic->opaque= opaque;
181
        opaque->last_pic_num= -256*256*256*64;
182

    
183
        for(i=0; i<3; i++){
184
            int h_shift= i==0 ? 0 : h_chroma_shift;
185
            int v_shift= i==0 ? 0 : v_chroma_shift;
186

    
187
            pic->linesize[i]= pixel_size*w>>h_shift;
188

    
189
            pic->base[i]= av_mallocz((pic->linesize[i]*h>>v_shift)+16); //FIXME 16
190
            if(pic->base[i]==NULL) return -1;
191

    
192
            memset(pic->base[i], 128, pic->linesize[i]*h>>v_shift);
193
        
194
            if(s->flags&CODEC_FLAG_EMU_EDGE)
195
                pic->data[i] = pic->base[i] + 16; //FIXME 16
196
            else
197
                pic->data[i] = pic->base[i] + (pic->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift) + 16; //FIXME 16
198
            
199
            opaque->data[i]= pic->data[i];
200
        }
201
        pic->age= 256*256*256*64;
202
        pic->type= FF_BUFFER_TYPE_INTERNAL;
203
    }
204

    
205
    return 0;
206
}
207

    
208
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
209
    int i;
210
    
211
    assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
212
    
213
    for(i=0; i<3; i++)
214
        pic->data[i]=NULL;
215
//printf("R%X\n", pic->opaque);
216
}
217

    
218
enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, enum PixelFormat * fmt){
219
    return fmt[0];
220
}
221

    
222
void avcodec_get_context_defaults(AVCodecContext *s){
223
    s->bit_rate= 800*1000;
224
    s->bit_rate_tolerance= s->bit_rate*10;
225
    s->qmin= 2;
226
    s->qmax= 31;
227
    s->mb_qmin= 2;
228
    s->mb_qmax= 31;
229
    s->rc_eq= "tex^qComp";
230
    s->qcompress= 0.5;
231
    s->max_qdiff= 3;
232
    s->b_quant_factor=1.25;
233
    s->b_quant_offset=1.25;
234
    s->i_quant_factor=-0.8;
235
    s->i_quant_offset=0.0;
236
    s->error_concealment= 3;
237
    s->error_resilience= 1;
238
    s->workaround_bugs= FF_BUG_AUTODETECT;
239
    s->frame_rate = 25 * FRAME_RATE_BASE;
240
    s->gop_size= 50;
241
    s->me_method= ME_EPZS;
242
    s->get_buffer= avcodec_default_get_buffer;
243
    s->release_buffer= avcodec_default_release_buffer;
244
    s->get_format= avcodec_default_get_format;
245
    s->me_subpel_quality=8;
246
}
247

    
248
/**
249
 * allocates a AVCodecContext and set it to defaults.
250
 * this can be deallocated by simply calling free() 
251
 */
252
AVCodecContext *avcodec_alloc_context(void){
253
    AVCodecContext *avctx= av_mallocz(sizeof(AVCodecContext));
254
    
255
    if(avctx==NULL) return NULL;
256
    
257
    avcodec_get_context_defaults(avctx);
258
    
259
    return avctx;
260
}
261

    
262
/**
263
 * allocates a AVPFrame and set it to defaults.
264
 * this can be deallocated by simply calling free() 
265
 */
266
AVFrame *avcodec_alloc_frame(void){
267
    AVFrame *pic= av_mallocz(sizeof(AVFrame));
268
    
269
    return pic;
270
}
271

    
272
int avcodec_open(AVCodecContext *avctx, AVCodec *codec)
273
{
274
    int ret;
275

    
276
    avctx->codec = codec;
277
    avctx->codec_id = codec->id;
278
    avctx->frame_number = 0;
279
    if (codec->priv_data_size > 0) {
280
        avctx->priv_data = av_mallocz(codec->priv_data_size);
281
        if (!avctx->priv_data) 
282
            return -ENOMEM;
283
    } else {
284
        avctx->priv_data = NULL;
285
    }
286
    ret = avctx->codec->init(avctx);
287
    if (ret < 0) {
288
        av_freep(&avctx->priv_data);
289
        return ret;
290
    }
291
    return 0;
292
}
293

    
294
int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size, 
295
                         const short *samples)
296
{
297
    int ret;
298

    
299
    ret = avctx->codec->encode(avctx, buf, buf_size, (void *)samples);
300
    avctx->frame_number++;
301
    return ret;
302
}
303

    
304
int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size, 
305
                         const AVFrame *pict)
306
{
307
    int ret;
308

    
309
    ret = avctx->codec->encode(avctx, buf, buf_size, (void *)pict);
310
    
311
    emms_c(); //needed to avoid a emms_c() call before every return;
312

    
313
    avctx->frame_number++;
314
    return ret;
315
}
316

    
317
/* decode a frame. return -1 if error, otherwise return the number of
318
   bytes used. If no frame could be decompressed, *got_picture_ptr is
319
   zero. Otherwise, it is non zero */
320
int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture, 
321
                         int *got_picture_ptr,
322
                         uint8_t *buf, int buf_size)
323
{
324
    int ret;
325
    
326
    ret = avctx->codec->decode(avctx, picture, got_picture_ptr, 
327
                               buf, buf_size);
328

    
329
    emms_c(); //needed to avoid a emms_c() call before every return;
330
    
331
    if (*got_picture_ptr)                           
332
        avctx->frame_number++;
333
    return ret;
334
}
335

    
336
/* decode an audio frame. return -1 if error, otherwise return the
337
   *number of bytes used. If no frame could be decompressed,
338
   *frame_size_ptr is zero. Otherwise, it is the decompressed frame
339
   *size in BYTES. */
340
int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples, 
341
                         int *frame_size_ptr,
342
                         uint8_t *buf, int buf_size)
343
{
344
    int ret;
345

    
346
    ret = avctx->codec->decode(avctx, samples, frame_size_ptr, 
347
                               buf, buf_size);
348
    avctx->frame_number++;
349
    return ret;
350
}
351

    
352
int avcodec_close(AVCodecContext *avctx)
353
{
354
    if (avctx->codec->close)
355
        avctx->codec->close(avctx);
356
    av_freep(&avctx->priv_data);
357
    avctx->codec = NULL;
358
    return 0;
359
}
360

    
361
AVCodec *avcodec_find_encoder(enum CodecID id)
362
{
363
    AVCodec *p;
364
    p = first_avcodec;
365
    while (p) {
366
        if (p->encode != NULL && p->id == id)
367
            return p;
368
        p = p->next;
369
    }
370
    return NULL;
371
}
372

    
373
AVCodec *avcodec_find_encoder_by_name(const char *name)
374
{
375
    AVCodec *p;
376
    p = first_avcodec;
377
    while (p) {
378
        if (p->encode != NULL && strcmp(name,p->name) == 0)
379
            return p;
380
        p = p->next;
381
    }
382
    return NULL;
383
}
384

    
385
AVCodec *avcodec_find_decoder(enum CodecID id)
386
{
387
    AVCodec *p;
388
    p = first_avcodec;
389
    while (p) {
390
        if (p->decode != NULL && p->id == id)
391
            return p;
392
        p = p->next;
393
    }
394
    return NULL;
395
}
396

    
397
AVCodec *avcodec_find_decoder_by_name(const char *name)
398
{
399
    AVCodec *p;
400
    p = first_avcodec;
401
    while (p) {
402
        if (p->decode != NULL && strcmp(name,p->name) == 0)
403
            return p;
404
        p = p->next;
405
    }
406
    return NULL;
407
}
408

    
409
AVCodec *avcodec_find(enum CodecID id)
410
{
411
    AVCodec *p;
412
    p = first_avcodec;
413
    while (p) {
414
        if (p->id == id)
415
            return p;
416
        p = p->next;
417
    }
418
    return NULL;
419
}
420

    
421
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
422
{
423
    const char *codec_name;
424
    AVCodec *p;
425
    char buf1[32];
426
    char channels_str[100];
427
    int bitrate;
428

    
429
    if (encode)
430
        p = avcodec_find_encoder(enc->codec_id);
431
    else
432
        p = avcodec_find_decoder(enc->codec_id);
433

    
434
    if (p) {
435
        codec_name = p->name;
436
    } else if (enc->codec_name[0] != '\0') {
437
        codec_name = enc->codec_name;
438
    } else {
439
        /* output avi tags */
440
        if (enc->codec_type == CODEC_TYPE_VIDEO) {
441
            snprintf(buf1, sizeof(buf1), "%c%c%c%c", 
442
                     enc->codec_tag & 0xff,
443
                     (enc->codec_tag >> 8) & 0xff,
444
                     (enc->codec_tag >> 16) & 0xff,
445
                     (enc->codec_tag >> 24) & 0xff);
446
        } else {
447
            snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);
448
        }
449
        codec_name = buf1;
450
    }
451

    
452
    switch(enc->codec_type) {
453
    case CODEC_TYPE_VIDEO:
454
        snprintf(buf, buf_size,
455
                 "Video: %s%s",
456
                 codec_name, enc->flags & CODEC_FLAG_HQ ? " (hq)" : "");
457
        if (enc->codec_id == CODEC_ID_RAWVIDEO) {
458
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
459
                     ", %s",
460
                     avcodec_get_pix_fmt_name(enc->pix_fmt));
461
        }
462
        if (enc->width) {
463
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
464
                     ", %dx%d, %0.2f fps",
465
                     enc->width, enc->height, 
466
                     (float)enc->frame_rate / FRAME_RATE_BASE);
467
        }
468
        if (encode) {
469
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
470
                     ", q=%d-%d", enc->qmin, enc->qmax);
471
        }
472
        bitrate = enc->bit_rate;
473
        break;
474
    case CODEC_TYPE_AUDIO:
475
        snprintf(buf, buf_size,
476
                 "Audio: %s",
477
                 codec_name);
478
        switch (enc->channels) {
479
            case 1:
480
                strcpy(channels_str, "mono");
481
                break;
482
            case 2:
483
                strcpy(channels_str, "stereo");
484
                break;
485
            case 6:
486
                strcpy(channels_str, "5:1");
487
                break;
488
            default:
489
                sprintf(channels_str, "%d channels", enc->channels);
490
                break;
491
        }
492
        if (enc->sample_rate) {
493
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
494
                     ", %d Hz, %s",
495
                     enc->sample_rate,
496
                     channels_str);
497
        }
498
        
499
        /* for PCM codecs, compute bitrate directly */
500
        switch(enc->codec_id) {
501
        case CODEC_ID_PCM_S16LE:
502
        case CODEC_ID_PCM_S16BE:
503
        case CODEC_ID_PCM_U16LE:
504
        case CODEC_ID_PCM_U16BE:
505
            bitrate = enc->sample_rate * enc->channels * 16;
506
            break;
507
        case CODEC_ID_PCM_S8:
508
        case CODEC_ID_PCM_U8:
509
        case CODEC_ID_PCM_ALAW:
510
        case CODEC_ID_PCM_MULAW:
511
            bitrate = enc->sample_rate * enc->channels * 8;
512
            break;
513
        default:
514
            bitrate = enc->bit_rate;
515
            break;
516
        }
517
        break;
518
    default:
519
        av_abort();
520
    }
521
    if (encode) {
522
        if (enc->flags & CODEC_FLAG_PASS1)
523
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
524
                     ", pass 1");
525
        if (enc->flags & CODEC_FLAG_PASS2)
526
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
527
                     ", pass 2");
528
    }
529
    if (bitrate != 0) {
530
        snprintf(buf + strlen(buf), buf_size - strlen(buf), 
531
                 ", %d kb/s", bitrate / 1000);
532
    }
533
}
534

    
535
unsigned avcodec_version( void )
536
{
537
  return LIBAVCODEC_VERSION_INT;
538
}
539

    
540
unsigned avcodec_build( void )
541
{
542
  return LIBAVCODEC_BUILD;
543
}
544

    
545
/* must be called before any other functions */
546
void avcodec_init(void)
547
{
548
    static int inited = 0;
549

    
550
    if (inited != 0)
551
        return;
552
    inited = 1;
553

    
554
    //dsputil_init();
555
}
556

    
557
/* this can be called after seeking and before trying to decode the next keyframe */
558
void avcodec_flush_buffers(AVCodecContext *avctx)
559
{
560
    int i;
561
    MpegEncContext *s = avctx->priv_data;
562
    
563
    switch(avctx->codec_id){
564
    case CODEC_ID_MPEG1VIDEO:
565
    case CODEC_ID_H263:
566
    case CODEC_ID_RV10:
567
    case CODEC_ID_MJPEG:
568
    case CODEC_ID_MJPEGB:
569
    case CODEC_ID_MPEG4:
570
    case CODEC_ID_MSMPEG4V1:
571
    case CODEC_ID_MSMPEG4V2:
572
    case CODEC_ID_MSMPEG4V3:
573
    case CODEC_ID_WMV1:
574
    case CODEC_ID_WMV2:
575
    case CODEC_ID_H263P:
576
    case CODEC_ID_H263I:
577
    case CODEC_ID_SVQ1:
578
        for(i=0; i<MAX_PICTURE_COUNT; i++){
579
           if(s->picture[i].data[0] && (   s->picture[i].type == FF_BUFFER_TYPE_INTERNAL
580
                                        || s->picture[i].type == FF_BUFFER_TYPE_USER))
581
            avctx->release_buffer(avctx, (AVFrame*)&s->picture[i]);
582
        }
583
        s->last_picture.data[0] = s->next_picture.data[0] = NULL;
584
        break;
585
    default:
586
        //FIXME
587
        break;
588
    }
589
}
590

    
591
static int raw_encode_init(AVCodecContext *s)
592
{
593
    return 0;
594
}
595

    
596
static int raw_decode_frame(AVCodecContext *avctx,
597
                            void *data, int *data_size,
598
                            uint8_t *buf, int buf_size)
599
{
600
    return -1;
601
}
602

    
603
static int raw_encode_frame(AVCodecContext *avctx,
604
                            unsigned char *frame, int buf_size, void *data)
605
{
606
    return -1;
607
}
608

    
609
AVCodec rawvideo_codec = {
610
    "rawvideo",
611
    CODEC_TYPE_VIDEO,
612
    CODEC_ID_RAWVIDEO,
613
    0,
614
    raw_encode_init,
615
    raw_encode_frame,
616
    NULL,
617
    raw_decode_frame,
618
};