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ffmpeg / libavcodec / utils.c @ 72415b2a

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1
/*
2
 * utils for libavcodec
3
 * Copyright (c) 2001 Fabrice Bellard
4
 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
5
 *
6
 * This file is part of FFmpeg.
7
 *
8
 * FFmpeg is free software; you can redistribute it and/or
9
 * modify it under the terms of the GNU Lesser General Public
10
 * License as published by the Free Software Foundation; either
11
 * version 2.1 of the License, or (at your option) any later version.
12
 *
13
 * FFmpeg is distributed in the hope that it will be useful,
14
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
18
 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
22

    
23
/**
24
 * @file libavcodec/utils.c
25
 * utils.
26
 */
27

    
28
/* needed for mkstemp() */
29
#define _XOPEN_SOURCE 600
30

    
31
#include "libavutil/avstring.h"
32
#include "libavutil/integer.h"
33
#include "libavutil/crc.h"
34
#include "libavutil/pixdesc.h"
35
#include "avcodec.h"
36
#include "dsputil.h"
37
#include "opt.h"
38
#include "imgconvert.h"
39
#include "audioconvert.h"
40
#include "libxvid_internal.h"
41
#include "internal.h"
42
#include <stdlib.h>
43
#include <stdarg.h>
44
#include <limits.h>
45
#include <float.h>
46
#if !HAVE_MKSTEMP
47
#include <fcntl.h>
48
#endif
49

    
50
static int volatile entangled_thread_counter=0;
51
int (*ff_lockmgr_cb)(void **mutex, enum AVLockOp op);
52
static void *codec_mutex;
53

    
54
void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size)
55
{
56
    if(min_size < *size)
57
        return ptr;
58

    
59
    *size= FFMAX(17*min_size/16 + 32, min_size);
60

    
61
    ptr= av_realloc(ptr, *size);
62
    if(!ptr) //we could set this to the unmodified min_size but this is safer if the user lost the ptr and uses NULL now
63
        *size= 0;
64

    
65
    return ptr;
66
}
67

    
68
void av_fast_malloc(void *ptr, unsigned int *size, unsigned int min_size)
69
{
70
    void **p = ptr;
71
    if (min_size < *size)
72
        return;
73
    *size= FFMAX(17*min_size/16 + 32, min_size);
74
    av_free(*p);
75
    *p = av_malloc(*size);
76
    if (!*p) *size = 0;
77
}
78

    
79
/* encoder management */
80
static AVCodec *first_avcodec = NULL;
81

    
82
AVCodec *av_codec_next(AVCodec *c){
83
    if(c) return c->next;
84
    else  return first_avcodec;
85
}
86

    
87
void avcodec_register(AVCodec *codec)
88
{
89
    AVCodec **p;
90
    avcodec_init();
91
    p = &first_avcodec;
92
    while (*p != NULL) p = &(*p)->next;
93
    *p = codec;
94
    codec->next = NULL;
95
}
96

    
97
#if LIBAVCODEC_VERSION_MAJOR < 53
98
void register_avcodec(AVCodec *codec)
99
{
100
    avcodec_register(codec);
101
}
102
#endif
103

    
104
void avcodec_set_dimensions(AVCodecContext *s, int width, int height){
105
    s->coded_width = width;
106
    s->coded_height= height;
107
    s->width = -((-width )>>s->lowres);
108
    s->height= -((-height)>>s->lowres);
109
}
110

    
111
typedef struct InternalBuffer{
112
    int last_pic_num;
113
    uint8_t *base[4];
114
    uint8_t *data[4];
115
    int linesize[4];
116
    int width, height;
117
    enum PixelFormat pix_fmt;
118
}InternalBuffer;
119

    
120
#define INTERNAL_BUFFER_SIZE 32
121

    
122
void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height, int linesize_align[4]){
123
    int w_align= 1;
124
    int h_align= 1;
125

    
126
    switch(s->pix_fmt){
127
    case PIX_FMT_YUV420P:
128
    case PIX_FMT_YUYV422:
129
    case PIX_FMT_UYVY422:
130
    case PIX_FMT_YUV422P:
131
    case PIX_FMT_YUV440P:
132
    case PIX_FMT_YUV444P:
133
    case PIX_FMT_GRAY8:
134
    case PIX_FMT_GRAY16BE:
135
    case PIX_FMT_GRAY16LE:
136
    case PIX_FMT_YUVJ420P:
137
    case PIX_FMT_YUVJ422P:
138
    case PIX_FMT_YUVJ440P:
139
    case PIX_FMT_YUVJ444P:
140
    case PIX_FMT_YUVA420P:
141
        w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
142
        h_align= 16;
143
        if(s->codec_id == CODEC_ID_MPEG2VIDEO || s->codec_id == CODEC_ID_MJPEG || s->codec_id == CODEC_ID_AMV || s->codec_id == CODEC_ID_THP)
144
            h_align= 32; // interlaced is rounded up to 2 MBs
145
        break;
146
    case PIX_FMT_YUV411P:
147
    case PIX_FMT_UYYVYY411:
148
        w_align=32;
149
        h_align=8;
150
        break;
151
    case PIX_FMT_YUV410P:
152
        if(s->codec_id == CODEC_ID_SVQ1){
153
            w_align=64;
154
            h_align=64;
155
        }
156
    case PIX_FMT_RGB555:
157
        if(s->codec_id == CODEC_ID_RPZA){
158
            w_align=4;
159
            h_align=4;
160
        }
161
    case PIX_FMT_PAL8:
162
    case PIX_FMT_BGR8:
163
    case PIX_FMT_RGB8:
164
        if(s->codec_id == CODEC_ID_SMC){
165
            w_align=4;
166
            h_align=4;
167
        }
168
        break;
169
    case PIX_FMT_BGR24:
170
        if((s->codec_id == CODEC_ID_MSZH) || (s->codec_id == CODEC_ID_ZLIB)){
171
            w_align=4;
172
            h_align=4;
173
        }
174
        break;
175
    default:
176
        w_align= 1;
177
        h_align= 1;
178
        break;
179
    }
180

    
181
    *width = FFALIGN(*width , w_align);
182
    *height= FFALIGN(*height, h_align);
183
    if(s->codec_id == CODEC_ID_H264)
184
        *height+=2; // some of the optimized chroma MC reads one line too much
185

    
186
    linesize_align[0] =
187
    linesize_align[1] =
188
    linesize_align[2] =
189
    linesize_align[3] = STRIDE_ALIGN;
190
//STRIDE_ALIGN is 8 for SSE* but this does not work for SVQ1 chroma planes
191
//we could change STRIDE_ALIGN to 16 for x86/sse but it would increase the
192
//picture size unneccessarily in some cases. The solution here is not
193
//pretty and better ideas are welcome!
194
#if HAVE_MMX
195
    if(s->codec_id == CODEC_ID_SVQ1 || s->codec_id == CODEC_ID_VP5 ||
196
       s->codec_id == CODEC_ID_VP6 || s->codec_id == CODEC_ID_VP6F ||
197
       s->codec_id == CODEC_ID_VP6A) {
198
        linesize_align[0] =
199
        linesize_align[1] =
200
        linesize_align[2] = 16;
201
    }
202
#endif
203
}
204

    
205
void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
206
    int chroma_shift = av_pix_fmt_descriptors[s->pix_fmt].log2_chroma_w;
207
    int linesize_align[4];
208
    int align;
209
    avcodec_align_dimensions2(s, width, height, linesize_align);
210
    align = FFMAX(linesize_align[0], linesize_align[3]);
211
    linesize_align[1] <<= chroma_shift;
212
    linesize_align[2] <<= chroma_shift;
213
    align = FFMAX3(align, linesize_align[1], linesize_align[2]);
214
    *width=FFALIGN(*width, align);
215
}
216

    
217
int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h){
218
    if((int)w>0 && (int)h>0 && (w+128)*(uint64_t)(h+128) < INT_MAX/8)
219
        return 0;
220

    
221
    av_log(av_log_ctx, AV_LOG_ERROR, "picture size invalid (%ux%u)\n", w, h);
222
    return -1;
223
}
224

    
225
int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
226
    int i;
227
    int w= s->width;
228
    int h= s->height;
229
    InternalBuffer *buf;
230
    int *picture_number;
231

    
232
    if(pic->data[0]!=NULL) {
233
        av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n");
234
        return -1;
235
    }
236
    if(s->internal_buffer_count >= INTERNAL_BUFFER_SIZE) {
237
        av_log(s, AV_LOG_ERROR, "internal_buffer_count overflow (missing release_buffer?)\n");
238
        return -1;
239
    }
240

    
241
    if(avcodec_check_dimensions(s,w,h))
242
        return -1;
243

    
244
    if(s->internal_buffer==NULL){
245
        s->internal_buffer= av_mallocz((INTERNAL_BUFFER_SIZE+1)*sizeof(InternalBuffer));
246
    }
247
#if 0
248
    s->internal_buffer= av_fast_realloc(
249
        s->internal_buffer,
250
        &s->internal_buffer_size,
251
        sizeof(InternalBuffer)*FFMAX(99,  s->internal_buffer_count+1)/*FIXME*/
252
        );
253
#endif
254

    
255
    buf= &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
256
    picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE]).last_pic_num; //FIXME ugly hack
257
    (*picture_number)++;
258

    
259
    if(buf->base[0] && (buf->width != w || buf->height != h || buf->pix_fmt != s->pix_fmt)){
260
        for(i=0; i<4; i++){
261
            av_freep(&buf->base[i]);
262
            buf->data[i]= NULL;
263
        }
264
    }
265

    
266
    if(buf->base[0]){
267
        pic->age= *picture_number - buf->last_pic_num;
268
        buf->last_pic_num= *picture_number;
269
    }else{
270
        int h_chroma_shift, v_chroma_shift;
271
        int size[4] = {0};
272
        int tmpsize;
273
        int unaligned;
274
        AVPicture picture;
275
        int stride_align[4];
276

    
277
        avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
278

    
279
        avcodec_align_dimensions2(s, &w, &h, stride_align);
280

    
281
        if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
282
            w+= EDGE_WIDTH*2;
283
            h+= EDGE_WIDTH*2;
284
        }
285

    
286
        do {
287
            // NOTE: do not align linesizes individually, this breaks e.g. assumptions
288
            // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
289
            ff_fill_linesize(&picture, s->pix_fmt, w);
290
            // increase alignment of w for next try (rhs gives the lowest bit set in w)
291
            w += w & ~(w-1);
292

    
293
            unaligned = 0;
294
            for (i=0; i<4; i++){
295
                unaligned |= picture.linesize[i] % stride_align[i];
296
            }
297
        } while (unaligned);
298

    
299
        tmpsize = ff_fill_pointer(&picture, NULL, s->pix_fmt, h);
300
        if (tmpsize < 0)
301
            return -1;
302

    
303
        for (i=0; i<3 && picture.data[i+1]; i++)
304
            size[i] = picture.data[i+1] - picture.data[i];
305
        size[i] = tmpsize - (picture.data[i] - picture.data[0]);
306

    
307
        buf->last_pic_num= -256*256*256*64;
308
        memset(buf->base, 0, sizeof(buf->base));
309
        memset(buf->data, 0, sizeof(buf->data));
310

    
311
        for(i=0; i<4 && size[i]; i++){
312
            const int h_shift= i==0 ? 0 : h_chroma_shift;
313
            const int v_shift= i==0 ? 0 : v_chroma_shift;
314

    
315
            buf->linesize[i]= picture.linesize[i];
316

    
317
            buf->base[i]= av_malloc(size[i]+16); //FIXME 16
318
            if(buf->base[i]==NULL) return -1;
319
            memset(buf->base[i], 128, size[i]);
320

    
321
            // no edge if EDEG EMU or not planar YUV
322
            if((s->flags&CODEC_FLAG_EMU_EDGE) || !size[2])
323
                buf->data[i] = buf->base[i];
324
            else
325
                buf->data[i] = buf->base[i] + FFALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), stride_align[i]);
326
        }
327
        if(size[1] && !size[2])
328
            ff_set_systematic_pal((uint32_t*)buf->data[1], s->pix_fmt);
329
        buf->width  = s->width;
330
        buf->height = s->height;
331
        buf->pix_fmt= s->pix_fmt;
332
        pic->age= 256*256*256*64;
333
    }
334
    pic->type= FF_BUFFER_TYPE_INTERNAL;
335

    
336
    for(i=0; i<4; i++){
337
        pic->base[i]= buf->base[i];
338
        pic->data[i]= buf->data[i];
339
        pic->linesize[i]= buf->linesize[i];
340
    }
341
    s->internal_buffer_count++;
342

    
343
    pic->reordered_opaque= s->reordered_opaque;
344

    
345
    if(s->debug&FF_DEBUG_BUFFERS)
346
        av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
347

    
348
    return 0;
349
}
350

    
351
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
352
    int i;
353
    InternalBuffer *buf, *last;
354

    
355
    assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
356
    assert(s->internal_buffer_count);
357

    
358
    buf = NULL; /* avoids warning */
359
    for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
360
        buf= &((InternalBuffer*)s->internal_buffer)[i];
361
        if(buf->data[0] == pic->data[0])
362
            break;
363
    }
364
    assert(i < s->internal_buffer_count);
365
    s->internal_buffer_count--;
366
    last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
367

    
368
    FFSWAP(InternalBuffer, *buf, *last);
369

    
370
    for(i=0; i<4; i++){
371
        pic->data[i]=NULL;
372
//        pic->base[i]=NULL;
373
    }
374
//printf("R%X\n", pic->opaque);
375

    
376
    if(s->debug&FF_DEBUG_BUFFERS)
377
        av_log(s, AV_LOG_DEBUG, "default_release_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
378
}
379

    
380
int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
381
    AVFrame temp_pic;
382
    int i;
383

    
384
    /* If no picture return a new buffer */
385
    if(pic->data[0] == NULL) {
386
        /* We will copy from buffer, so must be readable */
387
        pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
388
        return s->get_buffer(s, pic);
389
    }
390

    
391
    /* If internal buffer type return the same buffer */
392
    if(pic->type == FF_BUFFER_TYPE_INTERNAL) {
393
        pic->reordered_opaque= s->reordered_opaque;
394
        return 0;
395
    }
396

    
397
    /*
398
     * Not internal type and reget_buffer not overridden, emulate cr buffer
399
     */
400
    temp_pic = *pic;
401
    for(i = 0; i < 4; i++)
402
        pic->data[i] = pic->base[i] = NULL;
403
    pic->opaque = NULL;
404
    /* Allocate new frame */
405
    if (s->get_buffer(s, pic))
406
        return -1;
407
    /* Copy image data from old buffer to new buffer */
408
    av_picture_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
409
             s->height);
410
    s->release_buffer(s, &temp_pic); // Release old frame
411
    return 0;
412
}
413

    
414
int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size){
415
    int i;
416

    
417
    for(i=0; i<count; i++){
418
        int r= func(c, (char*)arg + i*size);
419
        if(ret) ret[i]= r;
420
    }
421
    return 0;
422
}
423

    
424
int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr),void *arg, int *ret, int count){
425
    int i;
426

    
427
    for(i=0; i<count; i++){
428
        int r= func(c, arg, i, 0);
429
        if(ret) ret[i]= r;
430
    }
431
    return 0;
432
}
433

    
434
enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat *fmt){
435
    while (*fmt != PIX_FMT_NONE && ff_is_hwaccel_pix_fmt(*fmt))
436
        ++fmt;
437
    return fmt[0];
438
}
439

    
440
void avcodec_get_frame_defaults(AVFrame *pic){
441
    memset(pic, 0, sizeof(AVFrame));
442

    
443
    pic->pts= AV_NOPTS_VALUE;
444
    pic->key_frame= 1;
445
}
446

    
447
AVFrame *avcodec_alloc_frame(void){
448
    AVFrame *pic= av_malloc(sizeof(AVFrame));
449

    
450
    if(pic==NULL) return NULL;
451

    
452
    avcodec_get_frame_defaults(pic);
453

    
454
    return pic;
455
}
456

    
457
int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
458
{
459
    int ret= -1;
460

    
461
    /* If there is a user-supplied mutex locking routine, call it. */
462
    if (ff_lockmgr_cb) {
463
        if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
464
            return -1;
465
    }
466

    
467
    entangled_thread_counter++;
468
    if(entangled_thread_counter != 1){
469
        av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
470
        goto end;
471
    }
472

    
473
    if(avctx->codec || !codec)
474
        goto end;
475

    
476
    if (codec->priv_data_size > 0) {
477
        avctx->priv_data = av_mallocz(codec->priv_data_size);
478
        if (!avctx->priv_data) {
479
            ret = AVERROR(ENOMEM);
480
            goto end;
481
        }
482
    } else {
483
        avctx->priv_data = NULL;
484
    }
485

    
486
    if(avctx->coded_width && avctx->coded_height)
487
        avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
488
    else if(avctx->width && avctx->height)
489
        avcodec_set_dimensions(avctx, avctx->width, avctx->height);
490

    
491
#define SANE_NB_CHANNELS 128U
492
    if (((avctx->coded_width || avctx->coded_height)
493
        && avcodec_check_dimensions(avctx, avctx->coded_width, avctx->coded_height))
494
        || avctx->channels > SANE_NB_CHANNELS) {
495
        ret = AVERROR(EINVAL);
496
        goto free_and_end;
497
    }
498

    
499
    avctx->codec = codec;
500
    if ((avctx->codec_type == AVMEDIA_TYPE_UNKNOWN || avctx->codec_type == codec->type) &&
501
        avctx->codec_id == CODEC_ID_NONE) {
502
        avctx->codec_type = codec->type;
503
        avctx->codec_id   = codec->id;
504
    }
505
    if(avctx->codec_id != codec->id || avctx->codec_type != codec->type){
506
        av_log(avctx, AV_LOG_ERROR, "codec type or id mismatches\n");
507
        goto free_and_end;
508
    }
509
    avctx->frame_number = 0;
510
    if(avctx->codec->init){
511
        ret = avctx->codec->init(avctx);
512
        if (ret < 0) {
513
            goto free_and_end;
514
        }
515
    }
516
    ret=0;
517
end:
518
    entangled_thread_counter--;
519

    
520
    /* Release any user-supplied mutex. */
521
    if (ff_lockmgr_cb) {
522
        (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
523
    }
524
    return ret;
525
free_and_end:
526
    av_freep(&avctx->priv_data);
527
    avctx->codec= NULL;
528
    goto end;
529
}
530

    
531
int attribute_align_arg avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
532
                         const short *samples)
533
{
534
    if(buf_size < FF_MIN_BUFFER_SIZE && 0){
535
        av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
536
        return -1;
537
    }
538
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || samples){
539
        int ret = avctx->codec->encode(avctx, buf, buf_size, samples);
540
        avctx->frame_number++;
541
        return ret;
542
    }else
543
        return 0;
544
}
545

    
546
int attribute_align_arg avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
547
                         const AVFrame *pict)
548
{
549
    if(buf_size < FF_MIN_BUFFER_SIZE){
550
        av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
551
        return -1;
552
    }
553
    if(avcodec_check_dimensions(avctx,avctx->width,avctx->height))
554
        return -1;
555
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){
556
        int ret = avctx->codec->encode(avctx, buf, buf_size, pict);
557
        avctx->frame_number++;
558
        emms_c(); //needed to avoid an emms_c() call before every return;
559

    
560
        return ret;
561
    }else
562
        return 0;
563
}
564

    
565
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
566
                            const AVSubtitle *sub)
567
{
568
    int ret;
569
    if(sub->start_display_time) {
570
        av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
571
        return -1;
572
    }
573
    if(sub->num_rects == 0 || !sub->rects)
574
        return -1;
575
    ret = avctx->codec->encode(avctx, buf, buf_size, sub);
576
    avctx->frame_number++;
577
    return ret;
578
}
579

    
580
#if LIBAVCODEC_VERSION_MAJOR < 53
581
int attribute_align_arg avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
582
                         int *got_picture_ptr,
583
                         const uint8_t *buf, int buf_size)
584
{
585
    AVPacket avpkt;
586
    av_init_packet(&avpkt);
587
    avpkt.data = buf;
588
    avpkt.size = buf_size;
589
    // HACK for CorePNG to decode as normal PNG by default
590
    avpkt.flags = AV_PKT_FLAG_KEY;
591

    
592
    return avcodec_decode_video2(avctx, picture, got_picture_ptr, &avpkt);
593
}
594
#endif
595

    
596
int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
597
                         int *got_picture_ptr,
598
                         AVPacket *avpkt)
599
{
600
    int ret;
601

    
602
    *got_picture_ptr= 0;
603
    if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height))
604
        return -1;
605
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size){
606
        ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
607
                                avpkt);
608

    
609
        emms_c(); //needed to avoid an emms_c() call before every return;
610

    
611
        if (*got_picture_ptr)
612
            avctx->frame_number++;
613
    }else
614
        ret= 0;
615

    
616
    return ret;
617
}
618

    
619
#if LIBAVCODEC_VERSION_MAJOR < 53
620
int attribute_align_arg avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
621
                         int *frame_size_ptr,
622
                         const uint8_t *buf, int buf_size)
623
{
624
    AVPacket avpkt;
625
    av_init_packet(&avpkt);
626
    avpkt.data = buf;
627
    avpkt.size = buf_size;
628

    
629
    return avcodec_decode_audio3(avctx, samples, frame_size_ptr, &avpkt);
630
}
631
#endif
632

    
633
int attribute_align_arg avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
634
                         int *frame_size_ptr,
635
                         AVPacket *avpkt)
636
{
637
    int ret;
638

    
639
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size){
640
        //FIXME remove the check below _after_ ensuring that all audio check that the available space is enough
641
        if(*frame_size_ptr < AVCODEC_MAX_AUDIO_FRAME_SIZE){
642
            av_log(avctx, AV_LOG_ERROR, "buffer smaller than AVCODEC_MAX_AUDIO_FRAME_SIZE\n");
643
            return -1;
644
        }
645
        if(*frame_size_ptr < FF_MIN_BUFFER_SIZE ||
646
        *frame_size_ptr < avctx->channels * avctx->frame_size * sizeof(int16_t)){
647
            av_log(avctx, AV_LOG_ERROR, "buffer %d too small\n", *frame_size_ptr);
648
            return -1;
649
        }
650

    
651
        ret = avctx->codec->decode(avctx, samples, frame_size_ptr, avpkt);
652
        avctx->frame_number++;
653
    }else{
654
        ret= 0;
655
        *frame_size_ptr=0;
656
    }
657
    return ret;
658
}
659

    
660
#if LIBAVCODEC_VERSION_MAJOR < 53
661
int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
662
                            int *got_sub_ptr,
663
                            const uint8_t *buf, int buf_size)
664
{
665
    AVPacket avpkt;
666
    av_init_packet(&avpkt);
667
    avpkt.data = buf;
668
    avpkt.size = buf_size;
669

    
670
    return avcodec_decode_subtitle2(avctx, sub, got_sub_ptr, &avpkt);
671
}
672
#endif
673

    
674
int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
675
                            int *got_sub_ptr,
676
                            AVPacket *avpkt)
677
{
678
    int ret;
679

    
680
    *got_sub_ptr = 0;
681
    ret = avctx->codec->decode(avctx, sub, got_sub_ptr, avpkt);
682
    if (*got_sub_ptr)
683
        avctx->frame_number++;
684
    return ret;
685
}
686

    
687
av_cold int avcodec_close(AVCodecContext *avctx)
688
{
689
    /* If there is a user-supplied mutex locking routine, call it. */
690
    if (ff_lockmgr_cb) {
691
        if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
692
            return -1;
693
    }
694

    
695
    entangled_thread_counter++;
696
    if(entangled_thread_counter != 1){
697
        av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
698
        entangled_thread_counter--;
699
        return -1;
700
    }
701

    
702
    if (HAVE_THREADS && avctx->thread_opaque)
703
        avcodec_thread_free(avctx);
704
    if (avctx->codec && avctx->codec->close)
705
        avctx->codec->close(avctx);
706
    avcodec_default_free_buffers(avctx);
707
    av_freep(&avctx->priv_data);
708
    if(avctx->codec->encode)
709
        av_freep(&avctx->extradata);
710
    avctx->codec = NULL;
711
    entangled_thread_counter--;
712

    
713
    /* Release any user-supplied mutex. */
714
    if (ff_lockmgr_cb) {
715
        (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
716
    }
717
    return 0;
718
}
719

    
720
AVCodec *avcodec_find_encoder(enum CodecID id)
721
{
722
    AVCodec *p;
723
    p = first_avcodec;
724
    while (p) {
725
        if (p->encode != NULL && p->id == id)
726
            return p;
727
        p = p->next;
728
    }
729
    return NULL;
730
}
731

    
732
AVCodec *avcodec_find_encoder_by_name(const char *name)
733
{
734
    AVCodec *p;
735
    if (!name)
736
        return NULL;
737
    p = first_avcodec;
738
    while (p) {
739
        if (p->encode != NULL && strcmp(name,p->name) == 0)
740
            return p;
741
        p = p->next;
742
    }
743
    return NULL;
744
}
745

    
746
AVCodec *avcodec_find_decoder(enum CodecID id)
747
{
748
    AVCodec *p;
749
    p = first_avcodec;
750
    while (p) {
751
        if (p->decode != NULL && p->id == id)
752
            return p;
753
        p = p->next;
754
    }
755
    return NULL;
756
}
757

    
758
AVCodec *avcodec_find_decoder_by_name(const char *name)
759
{
760
    AVCodec *p;
761
    if (!name)
762
        return NULL;
763
    p = first_avcodec;
764
    while (p) {
765
        if (p->decode != NULL && strcmp(name,p->name) == 0)
766
            return p;
767
        p = p->next;
768
    }
769
    return NULL;
770
}
771

    
772
static int get_bit_rate(AVCodecContext *ctx)
773
{
774
    int bit_rate;
775
    int bits_per_sample;
776

    
777
    switch(ctx->codec_type) {
778
    case AVMEDIA_TYPE_VIDEO:
779
        bit_rate = ctx->bit_rate;
780
        break;
781
    case AVMEDIA_TYPE_AUDIO:
782
        bits_per_sample = av_get_bits_per_sample(ctx->codec_id);
783
        bit_rate = bits_per_sample ? ctx->sample_rate * ctx->channels * bits_per_sample : ctx->bit_rate;
784
        break;
785
    case AVMEDIA_TYPE_DATA:
786
        bit_rate = ctx->bit_rate;
787
        break;
788
    case AVMEDIA_TYPE_SUBTITLE:
789
        bit_rate = ctx->bit_rate;
790
        break;
791
    case AVMEDIA_TYPE_ATTACHMENT:
792
        bit_rate = ctx->bit_rate;
793
        break;
794
    default:
795
        bit_rate = 0;
796
        break;
797
    }
798
    return bit_rate;
799
}
800

    
801
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
802
{
803
    const char *codec_name;
804
    AVCodec *p;
805
    char buf1[32];
806
    int bitrate;
807
    AVRational display_aspect_ratio;
808

    
809
    if (encode)
810
        p = avcodec_find_encoder(enc->codec_id);
811
    else
812
        p = avcodec_find_decoder(enc->codec_id);
813

    
814
    if (p) {
815
        codec_name = p->name;
816
    } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
817
        /* fake mpeg2 transport stream codec (currently not
818
           registered) */
819
        codec_name = "mpeg2ts";
820
    } else if (enc->codec_name[0] != '\0') {
821
        codec_name = enc->codec_name;
822
    } else {
823
        /* output avi tags */
824
        if(   isprint(enc->codec_tag&0xFF) && isprint((enc->codec_tag>>8)&0xFF)
825
           && isprint((enc->codec_tag>>16)&0xFF) && isprint((enc->codec_tag>>24)&0xFF)){
826
            snprintf(buf1, sizeof(buf1), "%c%c%c%c / 0x%04X",
827
                     enc->codec_tag & 0xff,
828
                     (enc->codec_tag >> 8) & 0xff,
829
                     (enc->codec_tag >> 16) & 0xff,
830
                     (enc->codec_tag >> 24) & 0xff,
831
                      enc->codec_tag);
832
        } else {
833
            snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);
834
        }
835
        codec_name = buf1;
836
    }
837

    
838
    switch(enc->codec_type) {
839
    case AVMEDIA_TYPE_VIDEO:
840
        snprintf(buf, buf_size,
841
                 "Video: %s%s",
842
                 codec_name, enc->mb_decision ? " (hq)" : "");
843
        if (enc->pix_fmt != PIX_FMT_NONE) {
844
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
845
                     ", %s",
846
                     avcodec_get_pix_fmt_name(enc->pix_fmt));
847
        }
848
        if (enc->width) {
849
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
850
                     ", %dx%d",
851
                     enc->width, enc->height);
852
            if (enc->sample_aspect_ratio.num) {
853
                av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
854
                          enc->width*enc->sample_aspect_ratio.num,
855
                          enc->height*enc->sample_aspect_ratio.den,
856
                          1024*1024);
857
                snprintf(buf + strlen(buf), buf_size - strlen(buf),
858
                         " [PAR %d:%d DAR %d:%d]",
859
                         enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
860
                         display_aspect_ratio.num, display_aspect_ratio.den);
861
            }
862
            if(av_log_get_level() >= AV_LOG_DEBUG){
863
                int g= av_gcd(enc->time_base.num, enc->time_base.den);
864
                snprintf(buf + strlen(buf), buf_size - strlen(buf),
865
                     ", %d/%d",
866
                     enc->time_base.num/g, enc->time_base.den/g);
867
            }
868
        }
869
        if (encode) {
870
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
871
                     ", q=%d-%d", enc->qmin, enc->qmax);
872
        }
873
        break;
874
    case AVMEDIA_TYPE_AUDIO:
875
        snprintf(buf, buf_size,
876
                 "Audio: %s",
877
                 codec_name);
878
        if (enc->sample_rate) {
879
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
880
                     ", %d Hz", enc->sample_rate);
881
        }
882
        av_strlcat(buf, ", ", buf_size);
883
        avcodec_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
884
        if (enc->sample_fmt != SAMPLE_FMT_NONE) {
885
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
886
                     ", %s", avcodec_get_sample_fmt_name(enc->sample_fmt));
887
        }
888
        break;
889
    case AVMEDIA_TYPE_DATA:
890
        snprintf(buf, buf_size, "Data: %s", codec_name);
891
        break;
892
    case AVMEDIA_TYPE_SUBTITLE:
893
        snprintf(buf, buf_size, "Subtitle: %s", codec_name);
894
        break;
895
    case AVMEDIA_TYPE_ATTACHMENT:
896
        snprintf(buf, buf_size, "Attachment: %s", codec_name);
897
        break;
898
    default:
899
        snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
900
        return;
901
    }
902
    if (encode) {
903
        if (enc->flags & CODEC_FLAG_PASS1)
904
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
905
                     ", pass 1");
906
        if (enc->flags & CODEC_FLAG_PASS2)
907
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
908
                     ", pass 2");
909
    }
910
    bitrate = get_bit_rate(enc);
911
    if (bitrate != 0) {
912
        snprintf(buf + strlen(buf), buf_size - strlen(buf),
913
                 ", %d kb/s", bitrate / 1000);
914
    }
915
}
916

    
917
unsigned avcodec_version( void )
918
{
919
  return LIBAVCODEC_VERSION_INT;
920
}
921

    
922
const char *avcodec_configuration(void)
923
{
924
    return FFMPEG_CONFIGURATION;
925
}
926

    
927
const char *avcodec_license(void)
928
{
929
#define LICENSE_PREFIX "libavcodec license: "
930
    return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
931
}
932

    
933
void avcodec_init(void)
934
{
935
    static int initialized = 0;
936

    
937
    if (initialized != 0)
938
        return;
939
    initialized = 1;
940

    
941
    dsputil_static_init();
942
}
943

    
944
void avcodec_flush_buffers(AVCodecContext *avctx)
945
{
946
    if(avctx->codec->flush)
947
        avctx->codec->flush(avctx);
948
}
949

    
950
void avcodec_default_free_buffers(AVCodecContext *s){
951
    int i, j;
952

    
953
    if(s->internal_buffer==NULL) return;
954

    
955
    if (s->internal_buffer_count)
956
        av_log(s, AV_LOG_WARNING, "Found %i unreleased buffers!\n", s->internal_buffer_count);
957
    for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
958
        InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
959
        for(j=0; j<4; j++){
960
            av_freep(&buf->base[j]);
961
            buf->data[j]= NULL;
962
        }
963
    }
964
    av_freep(&s->internal_buffer);
965

    
966
    s->internal_buffer_count=0;
967
}
968

    
969
char av_get_pict_type_char(int pict_type){
970
    switch(pict_type){
971
    case FF_I_TYPE: return 'I';
972
    case FF_P_TYPE: return 'P';
973
    case FF_B_TYPE: return 'B';
974
    case FF_S_TYPE: return 'S';
975
    case FF_SI_TYPE:return 'i';
976
    case FF_SP_TYPE:return 'p';
977
    case FF_BI_TYPE:return 'b';
978
    default:        return '?';
979
    }
980
}
981

    
982
int av_get_bits_per_sample(enum CodecID codec_id){
983
    switch(codec_id){
984
    case CODEC_ID_ADPCM_SBPRO_2:
985
        return 2;
986
    case CODEC_ID_ADPCM_SBPRO_3:
987
        return 3;
988
    case CODEC_ID_ADPCM_SBPRO_4:
989
    case CODEC_ID_ADPCM_CT:
990
    case CODEC_ID_ADPCM_IMA_WAV:
991
    case CODEC_ID_ADPCM_MS:
992
    case CODEC_ID_ADPCM_YAMAHA:
993
        return 4;
994
    case CODEC_ID_PCM_ALAW:
995
    case CODEC_ID_PCM_MULAW:
996
    case CODEC_ID_PCM_S8:
997
    case CODEC_ID_PCM_U8:
998
    case CODEC_ID_PCM_ZORK:
999
        return 8;
1000
    case CODEC_ID_PCM_S16BE:
1001
    case CODEC_ID_PCM_S16LE:
1002
    case CODEC_ID_PCM_S16LE_PLANAR:
1003
    case CODEC_ID_PCM_U16BE:
1004
    case CODEC_ID_PCM_U16LE:
1005
        return 16;
1006
    case CODEC_ID_PCM_S24DAUD:
1007
    case CODEC_ID_PCM_S24BE:
1008
    case CODEC_ID_PCM_S24LE:
1009
    case CODEC_ID_PCM_U24BE:
1010
    case CODEC_ID_PCM_U24LE:
1011
        return 24;
1012
    case CODEC_ID_PCM_S32BE:
1013
    case CODEC_ID_PCM_S32LE:
1014
    case CODEC_ID_PCM_U32BE:
1015
    case CODEC_ID_PCM_U32LE:
1016
    case CODEC_ID_PCM_F32BE:
1017
    case CODEC_ID_PCM_F32LE:
1018
        return 32;
1019
    case CODEC_ID_PCM_F64BE:
1020
    case CODEC_ID_PCM_F64LE:
1021
        return 64;
1022
    default:
1023
        return 0;
1024
    }
1025
}
1026

    
1027
int av_get_bits_per_sample_format(enum SampleFormat sample_fmt) {
1028
    switch (sample_fmt) {
1029
    case SAMPLE_FMT_U8:
1030
        return 8;
1031
    case SAMPLE_FMT_S16:
1032
        return 16;
1033
    case SAMPLE_FMT_S32:
1034
    case SAMPLE_FMT_FLT:
1035
        return 32;
1036
    case SAMPLE_FMT_DBL:
1037
        return 64;
1038
    default:
1039
        return 0;
1040
    }
1041
}
1042

    
1043
#if !HAVE_THREADS
1044
int avcodec_thread_init(AVCodecContext *s, int thread_count){
1045
    s->thread_count = thread_count;
1046
    return -1;
1047
}
1048
#endif
1049

    
1050
unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
1051
{
1052
    unsigned int n = 0;
1053

    
1054
    while(v >= 0xff) {
1055
        *s++ = 0xff;
1056
        v -= 0xff;
1057
        n++;
1058
    }
1059
    *s = v;
1060
    n++;
1061
    return n;
1062
}
1063

    
1064
/* Wrapper to work around the lack of mkstemp() on mingw/cygin.
1065
 * Also, tries to create file in /tmp first, if possible.
1066
 * *prefix can be a character constant; *filename will be allocated internally.
1067
 * Returns file descriptor of opened file (or -1 on error)
1068
 * and opened file name in **filename. */
1069
int av_tempfile(char *prefix, char **filename) {
1070
    int fd=-1;
1071
#if !HAVE_MKSTEMP
1072
    *filename = tempnam(".", prefix);
1073
#else
1074
    size_t len = strlen(prefix) + 12; /* room for "/tmp/" and "XXXXXX\0" */
1075
    *filename = av_malloc(len);
1076
#endif
1077
    /* -----common section-----*/
1078
    if (*filename == NULL) {
1079
        av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot allocate file name\n");
1080
        return -1;
1081
    }
1082
#if !HAVE_MKSTEMP
1083
    fd = open(*filename, O_RDWR | O_BINARY | O_CREAT, 0444);
1084
#else
1085
    snprintf(*filename, len, "/tmp/%sXXXXXX", prefix);
1086
    fd = mkstemp(*filename);
1087
    if (fd < 0) {
1088
        snprintf(*filename, len, "./%sXXXXXX", prefix);
1089
        fd = mkstemp(*filename);
1090
    }
1091
#endif
1092
    /* -----common section-----*/
1093
    if (fd < 0) {
1094
        av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot open temporary file %s\n", *filename);
1095
        return -1;
1096
    }
1097
    return fd; /* success */
1098
}
1099

    
1100
typedef struct {
1101
    const char *abbr;
1102
    int width, height;
1103
} VideoFrameSizeAbbr;
1104

    
1105
typedef struct {
1106
    const char *abbr;
1107
    int rate_num, rate_den;
1108
} VideoFrameRateAbbr;
1109

    
1110
static const VideoFrameSizeAbbr video_frame_size_abbrs[] = {
1111
    { "ntsc",      720, 480 },
1112
    { "pal",       720, 576 },
1113
    { "qntsc",     352, 240 }, /* VCD compliant NTSC */
1114
    { "qpal",      352, 288 }, /* VCD compliant PAL */
1115
    { "sntsc",     640, 480 }, /* square pixel NTSC */
1116
    { "spal",      768, 576 }, /* square pixel PAL */
1117
    { "film",      352, 240 },
1118
    { "ntsc-film", 352, 240 },
1119
    { "sqcif",     128,  96 },
1120
    { "qcif",      176, 144 },
1121
    { "cif",       352, 288 },
1122
    { "4cif",      704, 576 },
1123
    { "16cif",    1408,1152 },
1124
    { "qqvga",     160, 120 },
1125
    { "qvga",      320, 240 },
1126
    { "vga",       640, 480 },
1127
    { "svga",      800, 600 },
1128
    { "xga",      1024, 768 },
1129
    { "uxga",     1600,1200 },
1130
    { "qxga",     2048,1536 },
1131
    { "sxga",     1280,1024 },
1132
    { "qsxga",    2560,2048 },
1133
    { "hsxga",    5120,4096 },
1134
    { "wvga",      852, 480 },
1135
    { "wxga",     1366, 768 },
1136
    { "wsxga",    1600,1024 },
1137
    { "wuxga",    1920,1200 },
1138
    { "woxga",    2560,1600 },
1139
    { "wqsxga",   3200,2048 },
1140
    { "wquxga",   3840,2400 },
1141
    { "whsxga",   6400,4096 },
1142
    { "whuxga",   7680,4800 },
1143
    { "cga",       320, 200 },
1144
    { "ega",       640, 350 },
1145
    { "hd480",     852, 480 },
1146
    { "hd720",    1280, 720 },
1147
    { "hd1080",   1920,1080 },
1148
};
1149

    
1150
static const VideoFrameRateAbbr video_frame_rate_abbrs[]= {
1151
    { "ntsc",      30000, 1001 },
1152
    { "pal",          25,    1 },
1153
    { "qntsc",     30000, 1001 }, /* VCD compliant NTSC */
1154
    { "qpal",         25,    1 }, /* VCD compliant PAL */
1155
    { "sntsc",     30000, 1001 }, /* square pixel NTSC */
1156
    { "spal",         25,    1 }, /* square pixel PAL */
1157
    { "film",         24,    1 },
1158
    { "ntsc-film", 24000, 1001 },
1159
};
1160

    
1161
int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str)
1162
{
1163
    int i;
1164
    int n = FF_ARRAY_ELEMS(video_frame_size_abbrs);
1165
    char *p;
1166
    int frame_width = 0, frame_height = 0;
1167

    
1168
    for(i=0;i<n;i++) {
1169
        if (!strcmp(video_frame_size_abbrs[i].abbr, str)) {
1170
            frame_width = video_frame_size_abbrs[i].width;
1171
            frame_height = video_frame_size_abbrs[i].height;
1172
            break;
1173
        }
1174
    }
1175
    if (i == n) {
1176
        p = str;
1177
        frame_width = strtol(p, &p, 10);
1178
        if (*p)
1179
            p++;
1180
        frame_height = strtol(p, &p, 10);
1181
    }
1182
    if (frame_width <= 0 || frame_height <= 0)
1183
        return -1;
1184
    *width_ptr = frame_width;
1185
    *height_ptr = frame_height;
1186
    return 0;
1187
}
1188

    
1189
int av_parse_video_frame_rate(AVRational *frame_rate, const char *arg)
1190
{
1191
    int i;
1192
    int n = FF_ARRAY_ELEMS(video_frame_rate_abbrs);
1193
    char* cp;
1194

    
1195
    /* First, we check our abbreviation table */
1196
    for (i = 0; i < n; ++i)
1197
         if (!strcmp(video_frame_rate_abbrs[i].abbr, arg)) {
1198
             frame_rate->num = video_frame_rate_abbrs[i].rate_num;
1199
             frame_rate->den = video_frame_rate_abbrs[i].rate_den;
1200
             return 0;
1201
         }
1202

    
1203
    /* Then, we try to parse it as fraction */
1204
    cp = strchr(arg, '/');
1205
    if (!cp)
1206
        cp = strchr(arg, ':');
1207
    if (cp) {
1208
        char* cpp;
1209
        frame_rate->num = strtol(arg, &cpp, 10);
1210
        if (cpp != arg || cpp == cp)
1211
            frame_rate->den = strtol(cp+1, &cpp, 10);
1212
        else
1213
           frame_rate->num = 0;
1214
    }
1215
    else {
1216
        /* Finally we give up and parse it as double */
1217
        AVRational time_base = av_d2q(strtod(arg, 0), 1001000);
1218
        frame_rate->den = time_base.den;
1219
        frame_rate->num = time_base.num;
1220
    }
1221
    if (!frame_rate->num || !frame_rate->den)
1222
        return -1;
1223
    else
1224
        return 0;
1225
}
1226

    
1227
int ff_match_2uint16(const uint16_t (*tab)[2], int size, int a, int b){
1228
    int i;
1229
    for(i=0; i<size && !(tab[i][0]==a && tab[i][1]==b); i++);
1230
    return i;
1231
}
1232

    
1233
void av_log_missing_feature(void *avc, const char *feature, int want_sample)
1234
{
1235
    av_log(avc, AV_LOG_WARNING, "%s not implemented. Update your FFmpeg "
1236
            "version to the newest one from SVN. If the problem still "
1237
            "occurs, it means that your file has a feature which has not "
1238
            "been implemented.", feature);
1239
    if(want_sample)
1240
        av_log_ask_for_sample(avc, NULL);
1241
    else
1242
        av_log(avc, AV_LOG_WARNING, "\n");
1243
}
1244

    
1245
void av_log_ask_for_sample(void *avc, const char *msg)
1246
{
1247
    if (msg)
1248
        av_log(avc, AV_LOG_WARNING, "%s ", msg);
1249
    av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
1250
            "of this file to ftp://upload.ffmpeg.org/MPlayer/incoming/ "
1251
            "and contact the ffmpeg-devel mailing list.\n");
1252
}
1253

    
1254
static AVHWAccel *first_hwaccel = NULL;
1255

    
1256
void av_register_hwaccel(AVHWAccel *hwaccel)
1257
{
1258
    AVHWAccel **p = &first_hwaccel;
1259
    while (*p)
1260
        p = &(*p)->next;
1261
    *p = hwaccel;
1262
    hwaccel->next = NULL;
1263
}
1264

    
1265
AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel)
1266
{
1267
    return hwaccel ? hwaccel->next : first_hwaccel;
1268
}
1269

    
1270
AVHWAccel *ff_find_hwaccel(enum CodecID codec_id, enum PixelFormat pix_fmt)
1271
{
1272
    AVHWAccel *hwaccel=NULL;
1273

    
1274
    while((hwaccel= av_hwaccel_next(hwaccel))){
1275
        if (   hwaccel->id      == codec_id
1276
            && hwaccel->pix_fmt == pix_fmt)
1277
            return hwaccel;
1278
    }
1279
    return NULL;
1280
}
1281

    
1282
int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))
1283
{
1284
    if (ff_lockmgr_cb) {
1285
        if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_DESTROY))
1286
            return -1;
1287
    }
1288

    
1289
    ff_lockmgr_cb = cb;
1290

    
1291
    if (ff_lockmgr_cb) {
1292
        if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_CREATE))
1293
            return -1;
1294
    }
1295
    return 0;
1296
}