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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
16
 * Lesser General Public License for more details.
17
 *
18
 * You should have received a copy of the GNU Lesser General Public
19
 * License along with FFmpeg; if not, write to the Free Software
20
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21
 */
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 "avcodec.h"
35
#include "dsputil.h"
36
#include "opt.h"
37
#include "imgconvert.h"
38
#include "audioconvert.h"
39
#include "internal.h"
40
#include <stdlib.h>
41
#include <stdarg.h>
42
#include <limits.h>
43
#include <float.h>
44
#if !HAVE_MKSTEMP
45
#include <fcntl.h>
46
#endif
47

    
48
const uint8_t ff_reverse[256]={
49
0x00,0x80,0x40,0xC0,0x20,0xA0,0x60,0xE0,0x10,0x90,0x50,0xD0,0x30,0xB0,0x70,0xF0,
50
0x08,0x88,0x48,0xC8,0x28,0xA8,0x68,0xE8,0x18,0x98,0x58,0xD8,0x38,0xB8,0x78,0xF8,
51
0x04,0x84,0x44,0xC4,0x24,0xA4,0x64,0xE4,0x14,0x94,0x54,0xD4,0x34,0xB4,0x74,0xF4,
52
0x0C,0x8C,0x4C,0xCC,0x2C,0xAC,0x6C,0xEC,0x1C,0x9C,0x5C,0xDC,0x3C,0xBC,0x7C,0xFC,
53
0x02,0x82,0x42,0xC2,0x22,0xA2,0x62,0xE2,0x12,0x92,0x52,0xD2,0x32,0xB2,0x72,0xF2,
54
0x0A,0x8A,0x4A,0xCA,0x2A,0xAA,0x6A,0xEA,0x1A,0x9A,0x5A,0xDA,0x3A,0xBA,0x7A,0xFA,
55
0x06,0x86,0x46,0xC6,0x26,0xA6,0x66,0xE6,0x16,0x96,0x56,0xD6,0x36,0xB6,0x76,0xF6,
56
0x0E,0x8E,0x4E,0xCE,0x2E,0xAE,0x6E,0xEE,0x1E,0x9E,0x5E,0xDE,0x3E,0xBE,0x7E,0xFE,
57
0x01,0x81,0x41,0xC1,0x21,0xA1,0x61,0xE1,0x11,0x91,0x51,0xD1,0x31,0xB1,0x71,0xF1,
58
0x09,0x89,0x49,0xC9,0x29,0xA9,0x69,0xE9,0x19,0x99,0x59,0xD9,0x39,0xB9,0x79,0xF9,
59
0x05,0x85,0x45,0xC5,0x25,0xA5,0x65,0xE5,0x15,0x95,0x55,0xD5,0x35,0xB5,0x75,0xF5,
60
0x0D,0x8D,0x4D,0xCD,0x2D,0xAD,0x6D,0xED,0x1D,0x9D,0x5D,0xDD,0x3D,0xBD,0x7D,0xFD,
61
0x03,0x83,0x43,0xC3,0x23,0xA3,0x63,0xE3,0x13,0x93,0x53,0xD3,0x33,0xB3,0x73,0xF3,
62
0x0B,0x8B,0x4B,0xCB,0x2B,0xAB,0x6B,0xEB,0x1B,0x9B,0x5B,0xDB,0x3B,0xBB,0x7B,0xFB,
63
0x07,0x87,0x47,0xC7,0x27,0xA7,0x67,0xE7,0x17,0x97,0x57,0xD7,0x37,0xB7,0x77,0xF7,
64
0x0F,0x8F,0x4F,0xCF,0x2F,0xAF,0x6F,0xEF,0x1F,0x9F,0x5F,0xDF,0x3F,0xBF,0x7F,0xFF,
65
};
66

    
67
static int volatile entangled_thread_counter=0;
68
int (*ff_lockmgr_cb)(void **mutex, enum AVLockOp op);
69
static void *codec_mutex;
70

    
71
void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size)
72
{
73
    if(min_size < *size)
74
        return ptr;
75

    
76
    *size= FFMAX(17*min_size/16 + 32, min_size);
77

    
78
    ptr= av_realloc(ptr, *size);
79
    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
80
        *size= 0;
81

    
82
    return ptr;
83
}
84

    
85
void av_fast_malloc(void *ptr, unsigned int *size, unsigned int min_size)
86
{
87
    void **p = ptr;
88
    if (min_size < *size)
89
        return;
90
    *size= FFMAX(17*min_size/16 + 32, min_size);
91
    av_free(*p);
92
    *p = av_malloc(*size);
93
    if (!*p) *size = 0;
94
}
95

    
96
/* encoder management */
97
static AVCodec *first_avcodec = NULL;
98

    
99
AVCodec *av_codec_next(AVCodec *c){
100
    if(c) return c->next;
101
    else  return first_avcodec;
102
}
103

    
104
void avcodec_register(AVCodec *codec)
105
{
106
    AVCodec **p;
107
    avcodec_init();
108
    p = &first_avcodec;
109
    while (*p != NULL) p = &(*p)->next;
110
    *p = codec;
111
    codec->next = NULL;
112
}
113

    
114
#if LIBAVCODEC_VERSION_MAJOR < 53
115
void register_avcodec(AVCodec *codec)
116
{
117
    avcodec_register(codec);
118
}
119
#endif
120

    
121
void avcodec_set_dimensions(AVCodecContext *s, int width, int height){
122
    s->coded_width = width;
123
    s->coded_height= height;
124
    s->width = -((-width )>>s->lowres);
125
    s->height= -((-height)>>s->lowres);
126
}
127

    
128
typedef struct InternalBuffer{
129
    int last_pic_num;
130
    uint8_t *base[4];
131
    uint8_t *data[4];
132
    int linesize[4];
133
    int width, height;
134
    enum PixelFormat pix_fmt;
135
}InternalBuffer;
136

    
137
#define INTERNAL_BUFFER_SIZE 32
138

    
139
void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
140
    int w_align= 1;
141
    int h_align= 1;
142

    
143
    switch(s->pix_fmt){
144
    case PIX_FMT_YUV420P:
145
    case PIX_FMT_YUYV422:
146
    case PIX_FMT_UYVY422:
147
    case PIX_FMT_YUV422P:
148
    case PIX_FMT_YUV444P:
149
    case PIX_FMT_GRAY8:
150
    case PIX_FMT_GRAY16BE:
151
    case PIX_FMT_GRAY16LE:
152
    case PIX_FMT_YUVJ420P:
153
    case PIX_FMT_YUVJ422P:
154
    case PIX_FMT_YUVJ444P:
155
    case PIX_FMT_YUVA420P:
156
        w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
157
        h_align= 16;
158
        if(s->codec_id == CODEC_ID_MPEG2VIDEO)
159
            h_align= 32; // interlaced is rounded up to 2 MBs
160
        break;
161
    case PIX_FMT_YUV411P:
162
    case PIX_FMT_UYYVYY411:
163
        w_align=32;
164
        h_align=8;
165
        break;
166
    case PIX_FMT_YUV410P:
167
        if(s->codec_id == CODEC_ID_SVQ1){
168
            w_align=64;
169
            h_align=64;
170
        }
171
    case PIX_FMT_RGB555:
172
        if(s->codec_id == CODEC_ID_RPZA){
173
            w_align=4;
174
            h_align=4;
175
        }
176
    case PIX_FMT_PAL8:
177
    case PIX_FMT_BGR8:
178
    case PIX_FMT_RGB8:
179
        if(s->codec_id == CODEC_ID_SMC){
180
            w_align=4;
181
            h_align=4;
182
        }
183
        break;
184
    case PIX_FMT_BGR24:
185
        if((s->codec_id == CODEC_ID_MSZH) || (s->codec_id == CODEC_ID_ZLIB)){
186
            w_align=4;
187
            h_align=4;
188
        }
189
        break;
190
    default:
191
        w_align= 1;
192
        h_align= 1;
193
        break;
194
    }
195

    
196
    *width = FFALIGN(*width , w_align);
197
    *height= FFALIGN(*height, h_align);
198
    if(s->codec_id == CODEC_ID_H264)
199
        *height+=2; // some of the optimized chroma MC reads one line too much
200
}
201

    
202
int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h){
203
    if((int)w>0 && (int)h>0 && (w+128)*(uint64_t)(h+128) < INT_MAX/8)
204
        return 0;
205

    
206
    av_log(av_log_ctx, AV_LOG_ERROR, "picture size invalid (%ux%u)\n", w, h);
207
    return -1;
208
}
209

    
210
int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
211
    int i;
212
    int w= s->width;
213
    int h= s->height;
214
    InternalBuffer *buf;
215
    int *picture_number;
216

    
217
    if(pic->data[0]!=NULL) {
218
        av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n");
219
        return -1;
220
    }
221
    if(s->internal_buffer_count >= INTERNAL_BUFFER_SIZE) {
222
        av_log(s, AV_LOG_ERROR, "internal_buffer_count overflow (missing release_buffer?)\n");
223
        return -1;
224
    }
225

    
226
    if(avcodec_check_dimensions(s,w,h))
227
        return -1;
228

    
229
    if(s->internal_buffer==NULL){
230
        s->internal_buffer= av_mallocz((INTERNAL_BUFFER_SIZE+1)*sizeof(InternalBuffer));
231
    }
232
#if 0
233
    s->internal_buffer= av_fast_realloc(
234
        s->internal_buffer,
235
        &s->internal_buffer_size,
236
        sizeof(InternalBuffer)*FFMAX(99,  s->internal_buffer_count+1)/*FIXME*/
237
        );
238
#endif
239

    
240
    buf= &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
241
    picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE]).last_pic_num; //FIXME ugly hack
242
    (*picture_number)++;
243

    
244
    if(buf->base[0] && (buf->width != w || buf->height != h || buf->pix_fmt != s->pix_fmt)){
245
        for(i=0; i<4; i++){
246
            av_freep(&buf->base[i]);
247
            buf->data[i]= NULL;
248
        }
249
    }
250

    
251
    if(buf->base[0]){
252
        pic->age= *picture_number - buf->last_pic_num;
253
        buf->last_pic_num= *picture_number;
254
    }else{
255
        int h_chroma_shift, v_chroma_shift;
256
        int size[4] = {0};
257
        int tmpsize;
258
        int unaligned;
259
        AVPicture picture;
260
        int stride_align[4];
261

    
262
        avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
263

    
264
        avcodec_align_dimensions(s, &w, &h);
265

    
266
        if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
267
            w+= EDGE_WIDTH*2;
268
            h+= EDGE_WIDTH*2;
269
        }
270

    
271
        do {
272
            // NOTE: do not align linesizes individually, this breaks e.g. assumptions
273
            // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
274
            ff_fill_linesize(&picture, s->pix_fmt, w);
275
            // increase alignment of w for next try (rhs gives the lowest bit set in w)
276
            w += w & ~(w-1);
277

    
278
            unaligned = 0;
279
            for (i=0; i<4; i++){
280
//STRIDE_ALIGN is 8 for SSE* but this does not work for SVQ1 chroma planes
281
//we could change STRIDE_ALIGN to 16 for x86/sse but it would increase the
282
//picture size unneccessarily in some cases. The solution here is not
283
//pretty and better ideas are welcome!
284
#if HAVE_MMX
285
                if(s->codec_id == CODEC_ID_SVQ1)
286
                    stride_align[i]= 16;
287
                else
288
#endif
289
                stride_align[i] = STRIDE_ALIGN;
290
                unaligned |= picture.linesize[i] % stride_align[i];
291
            }
292
        } while (unaligned);
293

    
294
        tmpsize = ff_fill_pointer(&picture, NULL, s->pix_fmt, h);
295
        if (tmpsize < 0)
296
            return -1;
297

    
298
        for (i=0; i<3 && picture.data[i+1]; i++)
299
            size[i] = picture.data[i+1] - picture.data[i];
300
        size[i] = tmpsize - (picture.data[i] - picture.data[0]);
301

    
302
        buf->last_pic_num= -256*256*256*64;
303
        memset(buf->base, 0, sizeof(buf->base));
304
        memset(buf->data, 0, sizeof(buf->data));
305

    
306
        for(i=0; i<4 && size[i]; i++){
307
            const int h_shift= i==0 ? 0 : h_chroma_shift;
308
            const int v_shift= i==0 ? 0 : v_chroma_shift;
309

    
310
            buf->linesize[i]= picture.linesize[i];
311

    
312
            buf->base[i]= av_malloc(size[i]+16); //FIXME 16
313
            if(buf->base[i]==NULL) return -1;
314
            memset(buf->base[i], 128, size[i]);
315

    
316
            // no edge if EDEG EMU or not planar YUV
317
            if((s->flags&CODEC_FLAG_EMU_EDGE) || !size[2])
318
                buf->data[i] = buf->base[i];
319
            else
320
                buf->data[i] = buf->base[i] + FFALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), stride_align[i]);
321
        }
322
        if(size[1] && !size[2])
323
            ff_set_systematic_pal((uint32_t*)buf->data[1], s->pix_fmt);
324
        buf->width  = s->width;
325
        buf->height = s->height;
326
        buf->pix_fmt= s->pix_fmt;
327
        pic->age= 256*256*256*64;
328
    }
329
    pic->type= FF_BUFFER_TYPE_INTERNAL;
330

    
331
    for(i=0; i<4; i++){
332
        pic->base[i]= buf->base[i];
333
        pic->data[i]= buf->data[i];
334
        pic->linesize[i]= buf->linesize[i];
335
    }
336
    s->internal_buffer_count++;
337

    
338
    pic->reordered_opaque= s->reordered_opaque;
339

    
340
    if(s->debug&FF_DEBUG_BUFFERS)
341
        av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
342

    
343
    return 0;
344
}
345

    
346
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
347
    int i;
348
    InternalBuffer *buf, *last;
349

    
350
    assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
351
    assert(s->internal_buffer_count);
352

    
353
    buf = NULL; /* avoids warning */
354
    for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
355
        buf= &((InternalBuffer*)s->internal_buffer)[i];
356
        if(buf->data[0] == pic->data[0])
357
            break;
358
    }
359
    assert(i < s->internal_buffer_count);
360
    s->internal_buffer_count--;
361
    last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
362

    
363
    FFSWAP(InternalBuffer, *buf, *last);
364

    
365
    for(i=0; i<4; i++){
366
        pic->data[i]=NULL;
367
//        pic->base[i]=NULL;
368
    }
369
//printf("R%X\n", pic->opaque);
370

    
371
    if(s->debug&FF_DEBUG_BUFFERS)
372
        av_log(s, AV_LOG_DEBUG, "default_release_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
373
}
374

    
375
int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
376
    AVFrame temp_pic;
377
    int i;
378

    
379
    /* If no picture return a new buffer */
380
    if(pic->data[0] == NULL) {
381
        /* We will copy from buffer, so must be readable */
382
        pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
383
        return s->get_buffer(s, pic);
384
    }
385

    
386
    /* If internal buffer type return the same buffer */
387
    if(pic->type == FF_BUFFER_TYPE_INTERNAL)
388
        return 0;
389

    
390
    /*
391
     * Not internal type and reget_buffer not overridden, emulate cr buffer
392
     */
393
    temp_pic = *pic;
394
    for(i = 0; i < 4; i++)
395
        pic->data[i] = pic->base[i] = NULL;
396
    pic->opaque = NULL;
397
    /* Allocate new frame */
398
    if (s->get_buffer(s, pic))
399
        return -1;
400
    /* Copy image data from old buffer to new buffer */
401
    av_picture_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
402
             s->height);
403
    s->release_buffer(s, &temp_pic); // Release old frame
404
    return 0;
405
}
406

    
407
int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size){
408
    int i;
409

    
410
    for(i=0; i<count; i++){
411
        int r= func(c, (char*)arg + i*size);
412
        if(ret) ret[i]= r;
413
    }
414
    return 0;
415
}
416

    
417
enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat *fmt){
418
    while (*fmt != PIX_FMT_NONE && ff_is_hwaccel_pix_fmt(*fmt))
419
        ++fmt;
420
    return fmt[0];
421
}
422

    
423
void avcodec_get_frame_defaults(AVFrame *pic){
424
    memset(pic, 0, sizeof(AVFrame));
425

    
426
    pic->pts= AV_NOPTS_VALUE;
427
    pic->key_frame= 1;
428
}
429

    
430
AVFrame *avcodec_alloc_frame(void){
431
    AVFrame *pic= av_malloc(sizeof(AVFrame));
432

    
433
    if(pic==NULL) return NULL;
434

    
435
    avcodec_get_frame_defaults(pic);
436

    
437
    return pic;
438
}
439

    
440
int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
441
{
442
    int ret= -1;
443

    
444
    /* If there is a user-supplied mutex locking routine, call it. */
445
    if (ff_lockmgr_cb) {
446
        if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
447
            return -1;
448
    }
449

    
450
    entangled_thread_counter++;
451
    if(entangled_thread_counter != 1){
452
        av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
453
        goto end;
454
    }
455

    
456
    if(avctx->codec || !codec)
457
        goto end;
458

    
459
    if (codec->priv_data_size > 0) {
460
        avctx->priv_data = av_mallocz(codec->priv_data_size);
461
        if (!avctx->priv_data) {
462
            ret = AVERROR(ENOMEM);
463
            goto end;
464
        }
465
    } else {
466
        avctx->priv_data = NULL;
467
    }
468

    
469
    if(avctx->coded_width && avctx->coded_height)
470
        avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
471
    else if(avctx->width && avctx->height)
472
        avcodec_set_dimensions(avctx, avctx->width, avctx->height);
473

    
474
#define SANE_NB_CHANNELS 128U
475
    if (((avctx->coded_width || avctx->coded_height)
476
        && avcodec_check_dimensions(avctx, avctx->coded_width, avctx->coded_height))
477
        || avctx->channels > SANE_NB_CHANNELS) {
478
        ret = AVERROR(EINVAL);
479
        goto free_and_end;
480
    }
481

    
482
    avctx->codec = codec;
483
    if(avctx->codec_id != codec->id || avctx->codec_type != codec->type){
484
        av_log(avctx, AV_LOG_ERROR, "codec type or id mismatches\n");
485
        goto free_and_end;
486
    }
487
    avctx->frame_number = 0;
488
    if(avctx->codec->init){
489
        ret = avctx->codec->init(avctx);
490
        if (ret < 0) {
491
            goto free_and_end;
492
        }
493
    }
494
    ret=0;
495
end:
496
    entangled_thread_counter--;
497

    
498
    /* Release any user-supplied mutex. */
499
    if (ff_lockmgr_cb) {
500
        (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
501
    }
502
    return ret;
503
free_and_end:
504
    av_freep(&avctx->priv_data);
505
    avctx->codec= NULL;
506
    goto end;
507
}
508

    
509
int attribute_align_arg avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
510
                         const short *samples)
511
{
512
    if(buf_size < FF_MIN_BUFFER_SIZE && 0){
513
        av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
514
        return -1;
515
    }
516
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || samples){
517
        int ret = avctx->codec->encode(avctx, buf, buf_size, samples);
518
        avctx->frame_number++;
519
        return ret;
520
    }else
521
        return 0;
522
}
523

    
524
int attribute_align_arg avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
525
                         const AVFrame *pict)
526
{
527
    if(buf_size < FF_MIN_BUFFER_SIZE){
528
        av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
529
        return -1;
530
    }
531
    if(avcodec_check_dimensions(avctx,avctx->width,avctx->height))
532
        return -1;
533
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){
534
        int ret = avctx->codec->encode(avctx, buf, buf_size, pict);
535
        avctx->frame_number++;
536
        emms_c(); //needed to avoid an emms_c() call before every return;
537

    
538
        return ret;
539
    }else
540
        return 0;
541
}
542

    
543
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
544
                            const AVSubtitle *sub)
545
{
546
    int ret;
547
    if(sub->start_display_time) {
548
        av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
549
        return -1;
550
    }
551
    if(sub->num_rects == 0 || !sub->rects)
552
        return -1;
553
    ret = avctx->codec->encode(avctx, buf, buf_size, sub);
554
    avctx->frame_number++;
555
    return ret;
556
}
557

    
558
#if LIBAVCODEC_VERSION_MAJOR < 53
559
int attribute_align_arg avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
560
                         int *got_picture_ptr,
561
                         const uint8_t *buf, int buf_size)
562
{
563
    AVPacket avpkt;
564
    av_init_packet(&avpkt);
565
    avpkt.data = buf;
566
    avpkt.size = buf_size;
567
    // HACK for CorePNG to decode as normal PNG by default
568
    avpkt.flags = AV_PKT_FLAG_KEY;
569

    
570
    return avcodec_decode_video2(avctx, picture, got_picture_ptr, &avpkt);
571
}
572
#endif
573

    
574
int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
575
                         int *got_picture_ptr,
576
                         AVPacket *avpkt)
577
{
578
    int ret;
579

    
580
    *got_picture_ptr= 0;
581
    if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height))
582
        return -1;
583
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size){
584
        ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
585
                                avpkt);
586

    
587
        emms_c(); //needed to avoid an emms_c() call before every return;
588

    
589
        if (*got_picture_ptr)
590
            avctx->frame_number++;
591
    }else
592
        ret= 0;
593

    
594
    return ret;
595
}
596

    
597
#if LIBAVCODEC_VERSION_MAJOR < 53
598
int attribute_align_arg avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
599
                         int *frame_size_ptr,
600
                         const uint8_t *buf, int buf_size)
601
{
602
    AVPacket avpkt;
603
    av_init_packet(&avpkt);
604
    avpkt.data = buf;
605
    avpkt.size = buf_size;
606

    
607
    return avcodec_decode_audio3(avctx, samples, frame_size_ptr, &avpkt);
608
}
609
#endif
610

    
611
int attribute_align_arg avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
612
                         int *frame_size_ptr,
613
                         AVPacket *avpkt)
614
{
615
    int ret;
616

    
617
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size){
618
        //FIXME remove the check below _after_ ensuring that all audio check that the available space is enough
619
        if(*frame_size_ptr < AVCODEC_MAX_AUDIO_FRAME_SIZE){
620
            av_log(avctx, AV_LOG_ERROR, "buffer smaller than AVCODEC_MAX_AUDIO_FRAME_SIZE\n");
621
            return -1;
622
        }
623
        if(*frame_size_ptr < FF_MIN_BUFFER_SIZE ||
624
        *frame_size_ptr < avctx->channels * avctx->frame_size * sizeof(int16_t)){
625
            av_log(avctx, AV_LOG_ERROR, "buffer %d too small\n", *frame_size_ptr);
626
            return -1;
627
        }
628

    
629
        ret = avctx->codec->decode(avctx, samples, frame_size_ptr, avpkt);
630
        avctx->frame_number++;
631
    }else{
632
        ret= 0;
633
        *frame_size_ptr=0;
634
    }
635
    return ret;
636
}
637

    
638
#if LIBAVCODEC_VERSION_MAJOR < 53
639
int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
640
                            int *got_sub_ptr,
641
                            const uint8_t *buf, int buf_size)
642
{
643
    AVPacket avpkt;
644
    av_init_packet(&avpkt);
645
    avpkt.data = buf;
646
    avpkt.size = buf_size;
647

    
648
    return avcodec_decode_subtitle2(avctx, sub, got_sub_ptr, &avpkt);
649
}
650
#endif
651

    
652
int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
653
                            int *got_sub_ptr,
654
                            AVPacket *avpkt)
655
{
656
    int ret;
657

    
658
    *got_sub_ptr = 0;
659
    ret = avctx->codec->decode(avctx, sub, got_sub_ptr, avpkt);
660
    if (*got_sub_ptr)
661
        avctx->frame_number++;
662
    return ret;
663
}
664

    
665
int avcodec_close(AVCodecContext *avctx)
666
{
667
    /* If there is a user-supplied mutex locking routine, call it. */
668
    if (ff_lockmgr_cb) {
669
        if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
670
            return -1;
671
    }
672

    
673
    entangled_thread_counter++;
674
    if(entangled_thread_counter != 1){
675
        av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
676
        entangled_thread_counter--;
677
        return -1;
678
    }
679

    
680
    if (HAVE_THREADS && avctx->thread_opaque)
681
        avcodec_thread_free(avctx);
682
    if (avctx->codec->close)
683
        avctx->codec->close(avctx);
684
    avcodec_default_free_buffers(avctx);
685
    av_freep(&avctx->priv_data);
686
    avctx->codec = NULL;
687
    entangled_thread_counter--;
688

    
689
    /* Release any user-supplied mutex. */
690
    if (ff_lockmgr_cb) {
691
        (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
692
    }
693
    return 0;
694
}
695

    
696
AVCodec *avcodec_find_encoder(enum CodecID id)
697
{
698
    AVCodec *p;
699
    p = first_avcodec;
700
    while (p) {
701
        if (p->encode != NULL && p->id == id)
702
            return p;
703
        p = p->next;
704
    }
705
    return NULL;
706
}
707

    
708
AVCodec *avcodec_find_encoder_by_name(const char *name)
709
{
710
    AVCodec *p;
711
    if (!name)
712
        return NULL;
713
    p = first_avcodec;
714
    while (p) {
715
        if (p->encode != NULL && strcmp(name,p->name) == 0)
716
            return p;
717
        p = p->next;
718
    }
719
    return NULL;
720
}
721

    
722
AVCodec *avcodec_find_decoder(enum CodecID id)
723
{
724
    AVCodec *p;
725
    p = first_avcodec;
726
    while (p) {
727
        if (p->decode != NULL && p->id == id)
728
            return p;
729
        p = p->next;
730
    }
731
    return NULL;
732
}
733

    
734
AVCodec *avcodec_find_decoder_by_name(const char *name)
735
{
736
    AVCodec *p;
737
    if (!name)
738
        return NULL;
739
    p = first_avcodec;
740
    while (p) {
741
        if (p->decode != NULL && strcmp(name,p->name) == 0)
742
            return p;
743
        p = p->next;
744
    }
745
    return NULL;
746
}
747

    
748
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
749
{
750
    const char *codec_name;
751
    AVCodec *p;
752
    char buf1[32];
753
    int bitrate;
754
    AVRational display_aspect_ratio;
755

    
756
    if (encode)
757
        p = avcodec_find_encoder(enc->codec_id);
758
    else
759
        p = avcodec_find_decoder(enc->codec_id);
760

    
761
    if (p) {
762
        codec_name = p->name;
763
    } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
764
        /* fake mpeg2 transport stream codec (currently not
765
           registered) */
766
        codec_name = "mpeg2ts";
767
    } else if (enc->codec_name[0] != '\0') {
768
        codec_name = enc->codec_name;
769
    } else {
770
        /* output avi tags */
771
        if(   isprint(enc->codec_tag&0xFF) && isprint((enc->codec_tag>>8)&0xFF)
772
           && isprint((enc->codec_tag>>16)&0xFF) && isprint((enc->codec_tag>>24)&0xFF)){
773
            snprintf(buf1, sizeof(buf1), "%c%c%c%c / 0x%04X",
774
                     enc->codec_tag & 0xff,
775
                     (enc->codec_tag >> 8) & 0xff,
776
                     (enc->codec_tag >> 16) & 0xff,
777
                     (enc->codec_tag >> 24) & 0xff,
778
                      enc->codec_tag);
779
        } else {
780
            snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);
781
        }
782
        codec_name = buf1;
783
    }
784

    
785
    switch(enc->codec_type) {
786
    case CODEC_TYPE_VIDEO:
787
        snprintf(buf, buf_size,
788
                 "Video: %s%s",
789
                 codec_name, enc->mb_decision ? " (hq)" : "");
790
        if (enc->pix_fmt != PIX_FMT_NONE) {
791
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
792
                     ", %s",
793
                     avcodec_get_pix_fmt_name(enc->pix_fmt));
794
        }
795
        if (enc->width) {
796
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
797
                     ", %dx%d",
798
                     enc->width, enc->height);
799
            if (enc->sample_aspect_ratio.num) {
800
                av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
801
                          enc->width*enc->sample_aspect_ratio.num,
802
                          enc->height*enc->sample_aspect_ratio.den,
803
                          1024*1024);
804
                snprintf(buf + strlen(buf), buf_size - strlen(buf),
805
                         " [PAR %d:%d DAR %d:%d]",
806
                         enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
807
                         display_aspect_ratio.num, display_aspect_ratio.den);
808
            }
809
            if(av_log_get_level() >= AV_LOG_DEBUG){
810
                int g= av_gcd(enc->time_base.num, enc->time_base.den);
811
                snprintf(buf + strlen(buf), buf_size - strlen(buf),
812
                     ", %d/%d",
813
                     enc->time_base.num/g, enc->time_base.den/g);
814
            }
815
        }
816
        if (encode) {
817
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
818
                     ", q=%d-%d", enc->qmin, enc->qmax);
819
        }
820
        bitrate = enc->bit_rate;
821
        break;
822
    case CODEC_TYPE_AUDIO:
823
        snprintf(buf, buf_size,
824
                 "Audio: %s",
825
                 codec_name);
826
        if (enc->sample_rate) {
827
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
828
                     ", %d Hz", enc->sample_rate);
829
        }
830
        av_strlcat(buf, ", ", buf_size);
831
        avcodec_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
832
        if (enc->sample_fmt != SAMPLE_FMT_NONE) {
833
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
834
                     ", %s", avcodec_get_sample_fmt_name(enc->sample_fmt));
835
        }
836

    
837
        /* for PCM codecs, compute bitrate directly */
838
        switch(enc->codec_id) {
839
        case CODEC_ID_PCM_F64BE:
840
        case CODEC_ID_PCM_F64LE:
841
            bitrate = enc->sample_rate * enc->channels * 64;
842
            break;
843
        case CODEC_ID_PCM_S32LE:
844
        case CODEC_ID_PCM_S32BE:
845
        case CODEC_ID_PCM_U32LE:
846
        case CODEC_ID_PCM_U32BE:
847
        case CODEC_ID_PCM_F32BE:
848
        case CODEC_ID_PCM_F32LE:
849
            bitrate = enc->sample_rate * enc->channels * 32;
850
            break;
851
        case CODEC_ID_PCM_S24LE:
852
        case CODEC_ID_PCM_S24BE:
853
        case CODEC_ID_PCM_U24LE:
854
        case CODEC_ID_PCM_U24BE:
855
        case CODEC_ID_PCM_S24DAUD:
856
            bitrate = enc->sample_rate * enc->channels * 24;
857
            break;
858
        case CODEC_ID_PCM_S16LE:
859
        case CODEC_ID_PCM_S16BE:
860
        case CODEC_ID_PCM_S16LE_PLANAR:
861
        case CODEC_ID_PCM_U16LE:
862
        case CODEC_ID_PCM_U16BE:
863
            bitrate = enc->sample_rate * enc->channels * 16;
864
            break;
865
        case CODEC_ID_PCM_S8:
866
        case CODEC_ID_PCM_U8:
867
        case CODEC_ID_PCM_ALAW:
868
        case CODEC_ID_PCM_MULAW:
869
        case CODEC_ID_PCM_ZORK:
870
            bitrate = enc->sample_rate * enc->channels * 8;
871
            break;
872
        default:
873
            bitrate = enc->bit_rate;
874
            break;
875
        }
876
        break;
877
    case CODEC_TYPE_DATA:
878
        snprintf(buf, buf_size, "Data: %s", codec_name);
879
        bitrate = enc->bit_rate;
880
        break;
881
    case CODEC_TYPE_SUBTITLE:
882
        snprintf(buf, buf_size, "Subtitle: %s", codec_name);
883
        bitrate = enc->bit_rate;
884
        break;
885
    case CODEC_TYPE_ATTACHMENT:
886
        snprintf(buf, buf_size, "Attachment: %s", codec_name);
887
        bitrate = enc->bit_rate;
888
        break;
889
    default:
890
        snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
891
        return;
892
    }
893
    if (encode) {
894
        if (enc->flags & CODEC_FLAG_PASS1)
895
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
896
                     ", pass 1");
897
        if (enc->flags & CODEC_FLAG_PASS2)
898
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
899
                     ", pass 2");
900
    }
901
    if (bitrate != 0) {
902
        snprintf(buf + strlen(buf), buf_size - strlen(buf),
903
                 ", %d kb/s", bitrate / 1000);
904
    }
905
}
906

    
907
unsigned avcodec_version( void )
908
{
909
  return LIBAVCODEC_VERSION_INT;
910
}
911

    
912
void avcodec_init(void)
913
{
914
    static int initialized = 0;
915

    
916
    if (initialized != 0)
917
        return;
918
    initialized = 1;
919

    
920
    dsputil_static_init();
921
}
922

    
923
void avcodec_flush_buffers(AVCodecContext *avctx)
924
{
925
    if(avctx->codec->flush)
926
        avctx->codec->flush(avctx);
927
}
928

    
929
void avcodec_default_free_buffers(AVCodecContext *s){
930
    int i, j;
931

    
932
    if(s->internal_buffer==NULL) return;
933

    
934
    for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
935
        InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
936
        for(j=0; j<4; j++){
937
            av_freep(&buf->base[j]);
938
            buf->data[j]= NULL;
939
        }
940
    }
941
    av_freep(&s->internal_buffer);
942

    
943
    s->internal_buffer_count=0;
944
}
945

    
946
char av_get_pict_type_char(int pict_type){
947
    switch(pict_type){
948
    case FF_I_TYPE: return 'I';
949
    case FF_P_TYPE: return 'P';
950
    case FF_B_TYPE: return 'B';
951
    case FF_S_TYPE: return 'S';
952
    case FF_SI_TYPE:return 'i';
953
    case FF_SP_TYPE:return 'p';
954
    case FF_BI_TYPE:return 'b';
955
    default:        return '?';
956
    }
957
}
958

    
959
int av_get_bits_per_sample(enum CodecID codec_id){
960
    switch(codec_id){
961
    case CODEC_ID_ADPCM_SBPRO_2:
962
        return 2;
963
    case CODEC_ID_ADPCM_SBPRO_3:
964
        return 3;
965
    case CODEC_ID_ADPCM_SBPRO_4:
966
    case CODEC_ID_ADPCM_CT:
967
        return 4;
968
    case CODEC_ID_PCM_ALAW:
969
    case CODEC_ID_PCM_MULAW:
970
    case CODEC_ID_PCM_S8:
971
    case CODEC_ID_PCM_U8:
972
    case CODEC_ID_PCM_ZORK:
973
        return 8;
974
    case CODEC_ID_PCM_S16BE:
975
    case CODEC_ID_PCM_S16LE:
976
    case CODEC_ID_PCM_S16LE_PLANAR:
977
    case CODEC_ID_PCM_U16BE:
978
    case CODEC_ID_PCM_U16LE:
979
        return 16;
980
    case CODEC_ID_PCM_S24DAUD:
981
    case CODEC_ID_PCM_S24BE:
982
    case CODEC_ID_PCM_S24LE:
983
    case CODEC_ID_PCM_U24BE:
984
    case CODEC_ID_PCM_U24LE:
985
        return 24;
986
    case CODEC_ID_PCM_S32BE:
987
    case CODEC_ID_PCM_S32LE:
988
    case CODEC_ID_PCM_U32BE:
989
    case CODEC_ID_PCM_U32LE:
990
    case CODEC_ID_PCM_F32BE:
991
    case CODEC_ID_PCM_F32LE:
992
        return 32;
993
    case CODEC_ID_PCM_F64BE:
994
    case CODEC_ID_PCM_F64LE:
995
        return 64;
996
    default:
997
        return 0;
998
    }
999
}
1000

    
1001
int av_get_bits_per_sample_format(enum SampleFormat sample_fmt) {
1002
    switch (sample_fmt) {
1003
    case SAMPLE_FMT_U8:
1004
        return 8;
1005
    case SAMPLE_FMT_S16:
1006
        return 16;
1007
    case SAMPLE_FMT_S32:
1008
    case SAMPLE_FMT_FLT:
1009
        return 32;
1010
    case SAMPLE_FMT_DBL:
1011
        return 64;
1012
    default:
1013
        return 0;
1014
    }
1015
}
1016

    
1017
#if !HAVE_THREADS
1018
int avcodec_thread_init(AVCodecContext *s, int thread_count){
1019
    s->thread_count = thread_count;
1020
    return -1;
1021
}
1022
#endif
1023

    
1024
unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
1025
{
1026
    unsigned int n = 0;
1027

    
1028
    while(v >= 0xff) {
1029
        *s++ = 0xff;
1030
        v -= 0xff;
1031
        n++;
1032
    }
1033
    *s = v;
1034
    n++;
1035
    return n;
1036
}
1037

    
1038
/* Wrapper to work around the lack of mkstemp() on mingw/cygin.
1039
 * Also, tries to create file in /tmp first, if possible.
1040
 * *prefix can be a character constant; *filename will be allocated internally.
1041
 * Returns file descriptor of opened file (or -1 on error)
1042
 * and opened file name in **filename. */
1043
int av_tempfile(char *prefix, char **filename) {
1044
    int fd=-1;
1045
#if !HAVE_MKSTEMP
1046
    *filename = tempnam(".", prefix);
1047
#else
1048
    size_t len = strlen(prefix) + 12; /* room for "/tmp/" and "XXXXXX\0" */
1049
    *filename = av_malloc(len);
1050
#endif
1051
    /* -----common section-----*/
1052
    if (*filename == NULL) {
1053
        av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot allocate file name\n");
1054
        return -1;
1055
    }
1056
#if !HAVE_MKSTEMP
1057
    fd = open(*filename, O_RDWR | O_BINARY | O_CREAT, 0444);
1058
#else
1059
    snprintf(*filename, len, "/tmp/%sXXXXXX", prefix);
1060
    fd = mkstemp(*filename);
1061
    if (fd < 0) {
1062
        snprintf(*filename, len, "./%sXXXXXX", prefix);
1063
        fd = mkstemp(*filename);
1064
    }
1065
#endif
1066
    /* -----common section-----*/
1067
    if (fd < 0) {
1068
        av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot open temporary file %s\n", *filename);
1069
        return -1;
1070
    }
1071
    return fd; /* success */
1072
}
1073

    
1074
typedef struct {
1075
    const char *abbr;
1076
    int width, height;
1077
} VideoFrameSizeAbbr;
1078

    
1079
typedef struct {
1080
    const char *abbr;
1081
    int rate_num, rate_den;
1082
} VideoFrameRateAbbr;
1083

    
1084
static const VideoFrameSizeAbbr video_frame_size_abbrs[] = {
1085
    { "ntsc",      720, 480 },
1086
    { "pal",       720, 576 },
1087
    { "qntsc",     352, 240 }, /* VCD compliant NTSC */
1088
    { "qpal",      352, 288 }, /* VCD compliant PAL */
1089
    { "sntsc",     640, 480 }, /* square pixel NTSC */
1090
    { "spal",      768, 576 }, /* square pixel PAL */
1091
    { "film",      352, 240 },
1092
    { "ntsc-film", 352, 240 },
1093
    { "sqcif",     128,  96 },
1094
    { "qcif",      176, 144 },
1095
    { "cif",       352, 288 },
1096
    { "4cif",      704, 576 },
1097
    { "16cif",    1408,1152 },
1098
    { "qqvga",     160, 120 },
1099
    { "qvga",      320, 240 },
1100
    { "vga",       640, 480 },
1101
    { "svga",      800, 600 },
1102
    { "xga",      1024, 768 },
1103
    { "uxga",     1600,1200 },
1104
    { "qxga",     2048,1536 },
1105
    { "sxga",     1280,1024 },
1106
    { "qsxga",    2560,2048 },
1107
    { "hsxga",    5120,4096 },
1108
    { "wvga",      852, 480 },
1109
    { "wxga",     1366, 768 },
1110
    { "wsxga",    1600,1024 },
1111
    { "wuxga",    1920,1200 },
1112
    { "woxga",    2560,1600 },
1113
    { "wqsxga",   3200,2048 },
1114
    { "wquxga",   3840,2400 },
1115
    { "whsxga",   6400,4096 },
1116
    { "whuxga",   7680,4800 },
1117
    { "cga",       320, 200 },
1118
    { "ega",       640, 350 },
1119
    { "hd480",     852, 480 },
1120
    { "hd720",    1280, 720 },
1121
    { "hd1080",   1920,1080 },
1122
};
1123

    
1124
static const VideoFrameRateAbbr video_frame_rate_abbrs[]= {
1125
    { "ntsc",      30000, 1001 },
1126
    { "pal",          25,    1 },
1127
    { "qntsc",     30000, 1001 }, /* VCD compliant NTSC */
1128
    { "qpal",         25,    1 }, /* VCD compliant PAL */
1129
    { "sntsc",     30000, 1001 }, /* square pixel NTSC */
1130
    { "spal",         25,    1 }, /* square pixel PAL */
1131
    { "film",         24,    1 },
1132
    { "ntsc-film", 24000, 1001 },
1133
};
1134

    
1135
int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str)
1136
{
1137
    int i;
1138
    int n = FF_ARRAY_ELEMS(video_frame_size_abbrs);
1139
    char *p;
1140
    int frame_width = 0, frame_height = 0;
1141

    
1142
    for(i=0;i<n;i++) {
1143
        if (!strcmp(video_frame_size_abbrs[i].abbr, str)) {
1144
            frame_width = video_frame_size_abbrs[i].width;
1145
            frame_height = video_frame_size_abbrs[i].height;
1146
            break;
1147
        }
1148
    }
1149
    if (i == n) {
1150
        p = str;
1151
        frame_width = strtol(p, &p, 10);
1152
        if (*p)
1153
            p++;
1154
        frame_height = strtol(p, &p, 10);
1155
    }
1156
    if (frame_width <= 0 || frame_height <= 0)
1157
        return -1;
1158
    *width_ptr = frame_width;
1159
    *height_ptr = frame_height;
1160
    return 0;
1161
}
1162

    
1163
int av_parse_video_frame_rate(AVRational *frame_rate, const char *arg)
1164
{
1165
    int i;
1166
    int n = FF_ARRAY_ELEMS(video_frame_rate_abbrs);
1167
    char* cp;
1168

    
1169
    /* First, we check our abbreviation table */
1170
    for (i = 0; i < n; ++i)
1171
         if (!strcmp(video_frame_rate_abbrs[i].abbr, arg)) {
1172
             frame_rate->num = video_frame_rate_abbrs[i].rate_num;
1173
             frame_rate->den = video_frame_rate_abbrs[i].rate_den;
1174
             return 0;
1175
         }
1176

    
1177
    /* Then, we try to parse it as fraction */
1178
    cp = strchr(arg, '/');
1179
    if (!cp)
1180
        cp = strchr(arg, ':');
1181
    if (cp) {
1182
        char* cpp;
1183
        frame_rate->num = strtol(arg, &cpp, 10);
1184
        if (cpp != arg || cpp == cp)
1185
            frame_rate->den = strtol(cp+1, &cpp, 10);
1186
        else
1187
           frame_rate->num = 0;
1188
    }
1189
    else {
1190
        /* Finally we give up and parse it as double */
1191
        AVRational time_base = av_d2q(strtod(arg, 0), 1001000);
1192
        frame_rate->den = time_base.den;
1193
        frame_rate->num = time_base.num;
1194
    }
1195
    if (!frame_rate->num || !frame_rate->den)
1196
        return -1;
1197
    else
1198
        return 0;
1199
}
1200

    
1201
void av_log_missing_feature(void *avc, const char *feature, int want_sample)
1202
{
1203
    av_log(avc, AV_LOG_WARNING, "%s not implemented. Update your FFmpeg "
1204
            "version to the newest one from SVN. If the problem still "
1205
            "occurs, it means that your file has a feature which has not "
1206
            "been implemented.", feature);
1207
    if(want_sample)
1208
        av_log_ask_for_sample(avc, NULL);
1209
    else
1210
        av_log(avc, AV_LOG_WARNING, "\n");
1211
}
1212

    
1213
void av_log_ask_for_sample(void *avc, const char *msg)
1214
{
1215
    if (msg)
1216
        av_log(avc, AV_LOG_WARNING, "%s ", msg);
1217
    av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
1218
            "of this file to ftp://upload.ffmpeg.org/MPlayer/incoming/ "
1219
            "and contact the ffmpeg-devel mailing list.\n");
1220
}
1221

    
1222
static AVHWAccel *first_hwaccel = NULL;
1223

    
1224
void av_register_hwaccel(AVHWAccel *hwaccel)
1225
{
1226
    AVHWAccel **p = &first_hwaccel;
1227
    while (*p)
1228
        p = &(*p)->next;
1229
    *p = hwaccel;
1230
    hwaccel->next = NULL;
1231
}
1232

    
1233
AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel)
1234
{
1235
    return hwaccel ? hwaccel->next : first_hwaccel;
1236
}
1237

    
1238
AVHWAccel *ff_find_hwaccel(enum CodecID codec_id, enum PixelFormat pix_fmt)
1239
{
1240
    AVHWAccel *hwaccel=NULL;
1241

    
1242
    while((hwaccel= av_hwaccel_next(hwaccel))){
1243
        if (   hwaccel->id      == codec_id
1244
            && hwaccel->pix_fmt == pix_fmt)
1245
            return hwaccel;
1246
    }
1247
    return NULL;
1248
}
1249

    
1250
int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))
1251
{
1252
    if (ff_lockmgr_cb) {
1253
        if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_DESTROY))
1254
            return -1;
1255
    }
1256

    
1257
    ff_lockmgr_cb = cb;
1258

    
1259
    if (ff_lockmgr_cb) {
1260
        if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_CREATE))
1261
            return -1;
1262
    }
1263
    return 0;
1264
}