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ffmpeg / libavcodec / utils.c @ 505aa6c9

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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

    
69
void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size)
70
{
71
    if(min_size < *size)
72
        return ptr;
73

    
74
    *size= FFMAX(17*min_size/16 + 32, min_size);
75

    
76
    ptr= av_realloc(ptr, *size);
77
    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
78
        *size= 0;
79

    
80
    return ptr;
81
}
82

    
83
/* encoder management */
84
static AVCodec *first_avcodec = NULL;
85

    
86
AVCodec *av_codec_next(AVCodec *c){
87
    if(c) return c->next;
88
    else  return first_avcodec;
89
}
90

    
91
void avcodec_register(AVCodec *codec)
92
{
93
    AVCodec **p;
94
    avcodec_init();
95
    p = &first_avcodec;
96
    while (*p != NULL) p = &(*p)->next;
97
    *p = codec;
98
    codec->next = NULL;
99
}
100

    
101
#if LIBAVCODEC_VERSION_MAJOR < 53
102
void register_avcodec(AVCodec *codec)
103
{
104
    avcodec_register(codec);
105
}
106
#endif
107

    
108
void avcodec_set_dimensions(AVCodecContext *s, int width, int height){
109
    s->coded_width = width;
110
    s->coded_height= height;
111
    s->width = -((-width )>>s->lowres);
112
    s->height= -((-height)>>s->lowres);
113
}
114

    
115
typedef struct InternalBuffer{
116
    int last_pic_num;
117
    uint8_t *base[4];
118
    uint8_t *data[4];
119
    int linesize[4];
120
    int width, height;
121
    enum PixelFormat pix_fmt;
122
}InternalBuffer;
123

    
124
#define INTERNAL_BUFFER_SIZE 32
125

    
126
#define ALIGN(x, a) (((x)+(a)-1)&~((a)-1))
127

    
128
void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
129
    int w_align= 1;
130
    int h_align= 1;
131

    
132
    switch(s->pix_fmt){
133
    case PIX_FMT_YUV420P:
134
    case PIX_FMT_YUYV422:
135
    case PIX_FMT_UYVY422:
136
    case PIX_FMT_YUV422P:
137
    case PIX_FMT_YUV444P:
138
    case PIX_FMT_GRAY8:
139
    case PIX_FMT_GRAY16BE:
140
    case PIX_FMT_GRAY16LE:
141
    case PIX_FMT_YUVJ420P:
142
    case PIX_FMT_YUVJ422P:
143
    case PIX_FMT_YUVJ444P:
144
    case PIX_FMT_YUVA420P:
145
        w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
146
        h_align= 16;
147
        break;
148
    case PIX_FMT_YUV411P:
149
    case PIX_FMT_UYYVYY411:
150
        w_align=32;
151
        h_align=8;
152
        break;
153
    case PIX_FMT_YUV410P:
154
        if(s->codec_id == CODEC_ID_SVQ1){
155
            w_align=64;
156
            h_align=64;
157
        }
158
    case PIX_FMT_RGB555:
159
        if(s->codec_id == CODEC_ID_RPZA){
160
            w_align=4;
161
            h_align=4;
162
        }
163
    case PIX_FMT_PAL8:
164
    case PIX_FMT_BGR8:
165
    case PIX_FMT_RGB8:
166
        if(s->codec_id == CODEC_ID_SMC){
167
            w_align=4;
168
            h_align=4;
169
        }
170
        break;
171
    case PIX_FMT_BGR24:
172
        if((s->codec_id == CODEC_ID_MSZH) || (s->codec_id == CODEC_ID_ZLIB)){
173
            w_align=4;
174
            h_align=4;
175
        }
176
        break;
177
    default:
178
        w_align= 1;
179
        h_align= 1;
180
        break;
181
    }
182

    
183
    *width = ALIGN(*width , w_align);
184
    *height= ALIGN(*height, h_align);
185
    if(s->codec_id == CODEC_ID_H264)
186
        *height+=2; // some of the optimized chroma MC reads one line too much
187
}
188

    
189
int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h){
190
    if((int)w>0 && (int)h>0 && (w+128)*(uint64_t)(h+128) < INT_MAX/4)
191
        return 0;
192

    
193
    av_log(av_log_ctx, AV_LOG_ERROR, "picture size invalid (%ux%u)\n", w, h);
194
    return -1;
195
}
196

    
197
int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
198
    int i;
199
    int w= s->width;
200
    int h= s->height;
201
    InternalBuffer *buf;
202
    int *picture_number;
203

    
204
    if(pic->data[0]!=NULL) {
205
        av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n");
206
        return -1;
207
    }
208
    if(s->internal_buffer_count >= INTERNAL_BUFFER_SIZE) {
209
        av_log(s, AV_LOG_ERROR, "internal_buffer_count overflow (missing release_buffer?)\n");
210
        return -1;
211
    }
212

    
213
    if(avcodec_check_dimensions(s,w,h))
214
        return -1;
215

    
216
    if(s->internal_buffer==NULL){
217
        s->internal_buffer= av_mallocz((INTERNAL_BUFFER_SIZE+1)*sizeof(InternalBuffer));
218
    }
219
#if 0
220
    s->internal_buffer= av_fast_realloc(
221
        s->internal_buffer,
222
        &s->internal_buffer_size,
223
        sizeof(InternalBuffer)*FFMAX(99,  s->internal_buffer_count+1)/*FIXME*/
224
        );
225
#endif
226

    
227
    buf= &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
228
    picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE]).last_pic_num; //FIXME ugly hack
229
    (*picture_number)++;
230

    
231
    if(buf->base[0] && (buf->width != w || buf->height != h || buf->pix_fmt != s->pix_fmt)){
232
        for(i=0; i<4; i++){
233
            av_freep(&buf->base[i]);
234
            buf->data[i]= NULL;
235
        }
236
    }
237

    
238
    if(buf->base[0]){
239
        pic->age= *picture_number - buf->last_pic_num;
240
        buf->last_pic_num= *picture_number;
241
    }else{
242
        int h_chroma_shift, v_chroma_shift;
243
        int size[4] = {0};
244
        int tmpsize;
245
        AVPicture picture;
246
        int stride_align[4];
247

    
248
        avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
249

    
250
        avcodec_align_dimensions(s, &w, &h);
251

    
252
        if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
253
            w+= EDGE_WIDTH*2;
254
            h+= EDGE_WIDTH*2;
255
        }
256

    
257
        ff_fill_linesize(&picture, s->pix_fmt, w);
258

    
259
        for (i=0; i<4; i++){
260
//STRIDE_ALIGN is 8 for SSE* but this does not work for SVQ1 chroma planes
261
//we could change STRIDE_ALIGN to 16 for x86/sse but it would increase the
262
//picture size unneccessarily in some cases. The solution here is not
263
//pretty and better ideas are welcome!
264
#if HAVE_MMX
265
            if(s->codec_id == CODEC_ID_SVQ1)
266
                stride_align[i]= 16;
267
            else
268
#endif
269
            stride_align[i] = STRIDE_ALIGN;
270
            picture.linesize[i] = ALIGN(picture.linesize[i], stride_align[i]);
271
        }
272

    
273
        tmpsize = ff_fill_pointer(&picture, NULL, s->pix_fmt, h);
274

    
275
        for (i=0; i<3 && picture.data[i+1]; i++)
276
            size[i] = picture.data[i+1] - picture.data[i];
277
        size[i] = tmpsize - (picture.data[i] - picture.data[0]);
278

    
279
        buf->last_pic_num= -256*256*256*64;
280
        memset(buf->base, 0, sizeof(buf->base));
281
        memset(buf->data, 0, sizeof(buf->data));
282

    
283
        for(i=0; i<4 && size[i]; i++){
284
            const int h_shift= i==0 ? 0 : h_chroma_shift;
285
            const int v_shift= i==0 ? 0 : v_chroma_shift;
286

    
287
            buf->linesize[i]= picture.linesize[i];
288

    
289
            buf->base[i]= av_malloc(size[i]+16); //FIXME 16
290
            if(buf->base[i]==NULL) return -1;
291
            memset(buf->base[i], 128, size[i]);
292

    
293
            // no edge if EDEG EMU or not planar YUV
294
            if((s->flags&CODEC_FLAG_EMU_EDGE) || !size[2])
295
                buf->data[i] = buf->base[i];
296
            else
297
                buf->data[i] = buf->base[i] + ALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), stride_align[i]);
298
        }
299
        if(size[1] && !size[2])
300
            ff_set_systematic_pal((uint32_t*)buf->data[1], s->pix_fmt);
301
        buf->width  = s->width;
302
        buf->height = s->height;
303
        buf->pix_fmt= s->pix_fmt;
304
        pic->age= 256*256*256*64;
305
    }
306
    pic->type= FF_BUFFER_TYPE_INTERNAL;
307

    
308
    for(i=0; i<4; i++){
309
        pic->base[i]= buf->base[i];
310
        pic->data[i]= buf->data[i];
311
        pic->linesize[i]= buf->linesize[i];
312
    }
313
    s->internal_buffer_count++;
314

    
315
    pic->reordered_opaque= s->reordered_opaque;
316

    
317
    if(s->debug&FF_DEBUG_BUFFERS)
318
        av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
319

    
320
    return 0;
321
}
322

    
323
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
324
    int i;
325
    InternalBuffer *buf, *last;
326

    
327
    assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
328
    assert(s->internal_buffer_count);
329

    
330
    buf = NULL; /* avoids warning */
331
    for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
332
        buf= &((InternalBuffer*)s->internal_buffer)[i];
333
        if(buf->data[0] == pic->data[0])
334
            break;
335
    }
336
    assert(i < s->internal_buffer_count);
337
    s->internal_buffer_count--;
338
    last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
339

    
340
    FFSWAP(InternalBuffer, *buf, *last);
341

    
342
    for(i=0; i<4; i++){
343
        pic->data[i]=NULL;
344
//        pic->base[i]=NULL;
345
    }
346
//printf("R%X\n", pic->opaque);
347

    
348
    if(s->debug&FF_DEBUG_BUFFERS)
349
        av_log(s, AV_LOG_DEBUG, "default_release_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
350
}
351

    
352
int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
353
    AVFrame temp_pic;
354
    int i;
355

    
356
    /* If no picture return a new buffer */
357
    if(pic->data[0] == NULL) {
358
        /* We will copy from buffer, so must be readable */
359
        pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
360
        return s->get_buffer(s, pic);
361
    }
362

    
363
    /* If internal buffer type return the same buffer */
364
    if(pic->type == FF_BUFFER_TYPE_INTERNAL)
365
        return 0;
366

    
367
    /*
368
     * Not internal type and reget_buffer not overridden, emulate cr buffer
369
     */
370
    temp_pic = *pic;
371
    for(i = 0; i < 4; i++)
372
        pic->data[i] = pic->base[i] = NULL;
373
    pic->opaque = NULL;
374
    /* Allocate new frame */
375
    if (s->get_buffer(s, pic))
376
        return -1;
377
    /* Copy image data from old buffer to new buffer */
378
    av_picture_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
379
             s->height);
380
    s->release_buffer(s, &temp_pic); // Release old frame
381
    return 0;
382
}
383

    
384
int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size){
385
    int i;
386

    
387
    for(i=0; i<count; i++){
388
        int r= func(c, (char*)arg + i*size);
389
        if(ret) ret[i]= r;
390
    }
391
    return 0;
392
}
393

    
394
enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt){
395
    return fmt[0];
396
}
397

    
398
void avcodec_get_frame_defaults(AVFrame *pic){
399
    memset(pic, 0, sizeof(AVFrame));
400

    
401
    pic->pts= AV_NOPTS_VALUE;
402
    pic->key_frame= 1;
403
}
404

    
405
AVFrame *avcodec_alloc_frame(void){
406
    AVFrame *pic= av_malloc(sizeof(AVFrame));
407

    
408
    if(pic==NULL) return NULL;
409

    
410
    avcodec_get_frame_defaults(pic);
411

    
412
    return pic;
413
}
414

    
415
int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
416
{
417
    int ret= -1;
418

    
419
    entangled_thread_counter++;
420
    if(entangled_thread_counter != 1){
421
        av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
422
        goto end;
423
    }
424

    
425
    if(avctx->codec || !codec)
426
        goto end;
427

    
428
    if (codec->priv_data_size > 0) {
429
        avctx->priv_data = av_mallocz(codec->priv_data_size);
430
        if (!avctx->priv_data) {
431
            ret = AVERROR(ENOMEM);
432
            goto end;
433
        }
434
    } else {
435
        avctx->priv_data = NULL;
436
    }
437

    
438
    if(avctx->coded_width && avctx->coded_height)
439
        avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
440
    else if(avctx->width && avctx->height)
441
        avcodec_set_dimensions(avctx, avctx->width, avctx->height);
442

    
443
    if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height)){
444
        av_freep(&avctx->priv_data);
445
        ret = AVERROR(EINVAL);
446
        goto end;
447
    }
448

    
449
    avctx->codec = codec;
450
    avctx->codec_id = codec->id;
451
    avctx->frame_number = 0;
452
    if(avctx->codec->init){
453
        ret = avctx->codec->init(avctx);
454
        if (ret < 0) {
455
            av_freep(&avctx->priv_data);
456
            avctx->codec= NULL;
457
            goto end;
458
        }
459
    }
460
    ret=0;
461
end:
462
    entangled_thread_counter--;
463
    return ret;
464
}
465

    
466
int attribute_align_arg avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
467
                         const short *samples)
468
{
469
    if(buf_size < FF_MIN_BUFFER_SIZE && 0){
470
        av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
471
        return -1;
472
    }
473
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || samples){
474
        int ret = avctx->codec->encode(avctx, buf, buf_size, samples);
475
        avctx->frame_number++;
476
        return ret;
477
    }else
478
        return 0;
479
}
480

    
481
int attribute_align_arg avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
482
                         const AVFrame *pict)
483
{
484
    if(buf_size < FF_MIN_BUFFER_SIZE){
485
        av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
486
        return -1;
487
    }
488
    if(avcodec_check_dimensions(avctx,avctx->width,avctx->height))
489
        return -1;
490
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){
491
        int ret = avctx->codec->encode(avctx, buf, buf_size, pict);
492
        avctx->frame_number++;
493
        emms_c(); //needed to avoid an emms_c() call before every return;
494

    
495
        return ret;
496
    }else
497
        return 0;
498
}
499

    
500
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
501
                            const AVSubtitle *sub)
502
{
503
    int ret;
504
    if(sub->start_display_time) {
505
        av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
506
        return -1;
507
    }
508
    if(sub->num_rects == 0 || !sub->rects)
509
        return -1;
510
    ret = avctx->codec->encode(avctx, buf, buf_size, sub);
511
    avctx->frame_number++;
512
    return ret;
513
}
514

    
515
int attribute_align_arg avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
516
                         int *got_picture_ptr,
517
                         const uint8_t *buf, int buf_size)
518
{
519
    int ret;
520

    
521
    *got_picture_ptr= 0;
522
    if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height))
523
        return -1;
524
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || buf_size){
525
        ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
526
                                buf, buf_size);
527

    
528
        emms_c(); //needed to avoid an emms_c() call before every return;
529

    
530
        if (*got_picture_ptr)
531
            avctx->frame_number++;
532
    }else
533
        ret= 0;
534

    
535
    return ret;
536
}
537

    
538
int attribute_align_arg avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
539
                         int *frame_size_ptr,
540
                         const uint8_t *buf, int buf_size)
541
{
542
    int ret;
543

    
544
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || buf_size){
545
        //FIXME remove the check below _after_ ensuring that all audio check that the available space is enough
546
        if(*frame_size_ptr < AVCODEC_MAX_AUDIO_FRAME_SIZE){
547
            av_log(avctx, AV_LOG_ERROR, "buffer smaller than AVCODEC_MAX_AUDIO_FRAME_SIZE\n");
548
            return -1;
549
        }
550
        if(*frame_size_ptr < FF_MIN_BUFFER_SIZE ||
551
        *frame_size_ptr < avctx->channels * avctx->frame_size * sizeof(int16_t)){
552
            av_log(avctx, AV_LOG_ERROR, "buffer %d too small\n", *frame_size_ptr);
553
            return -1;
554
        }
555

    
556
        ret = avctx->codec->decode(avctx, samples, frame_size_ptr,
557
                                buf, buf_size);
558
        avctx->frame_number++;
559
    }else{
560
        ret= 0;
561
        *frame_size_ptr=0;
562
    }
563
    return ret;
564
}
565

    
566
int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
567
                            int *got_sub_ptr,
568
                            const uint8_t *buf, int buf_size)
569
{
570
    int ret;
571

    
572
    *got_sub_ptr = 0;
573
    ret = avctx->codec->decode(avctx, sub, got_sub_ptr,
574
                               buf, buf_size);
575
    if (*got_sub_ptr)
576
        avctx->frame_number++;
577
    return ret;
578
}
579

    
580
int avcodec_close(AVCodecContext *avctx)
581
{
582
    entangled_thread_counter++;
583
    if(entangled_thread_counter != 1){
584
        av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
585
        entangled_thread_counter--;
586
        return -1;
587
    }
588

    
589
    if (HAVE_THREADS && avctx->thread_opaque)
590
        avcodec_thread_free(avctx);
591
    if (avctx->codec->close)
592
        avctx->codec->close(avctx);
593
    avcodec_default_free_buffers(avctx);
594
    av_freep(&avctx->priv_data);
595
    avctx->codec = NULL;
596
    entangled_thread_counter--;
597
    return 0;
598
}
599

    
600
AVCodec *avcodec_find_encoder(enum CodecID id)
601
{
602
    AVCodec *p;
603
    p = first_avcodec;
604
    while (p) {
605
        if (p->encode != NULL && p->id == id)
606
            return p;
607
        p = p->next;
608
    }
609
    return NULL;
610
}
611

    
612
AVCodec *avcodec_find_encoder_by_name(const char *name)
613
{
614
    AVCodec *p;
615
    if (!name)
616
        return NULL;
617
    p = first_avcodec;
618
    while (p) {
619
        if (p->encode != NULL && strcmp(name,p->name) == 0)
620
            return p;
621
        p = p->next;
622
    }
623
    return NULL;
624
}
625

    
626
AVCodec *avcodec_find_decoder(enum CodecID id)
627
{
628
    AVCodec *p;
629
    p = first_avcodec;
630
    while (p) {
631
        if (p->decode != NULL && p->id == id)
632
            return p;
633
        p = p->next;
634
    }
635
    return NULL;
636
}
637

    
638
AVCodec *avcodec_find_decoder_by_name(const char *name)
639
{
640
    AVCodec *p;
641
    if (!name)
642
        return NULL;
643
    p = first_avcodec;
644
    while (p) {
645
        if (p->decode != NULL && strcmp(name,p->name) == 0)
646
            return p;
647
        p = p->next;
648
    }
649
    return NULL;
650
}
651

    
652
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
653
{
654
    const char *codec_name;
655
    AVCodec *p;
656
    char buf1[32];
657
    int bitrate;
658
    AVRational display_aspect_ratio;
659

    
660
    if (encode)
661
        p = avcodec_find_encoder(enc->codec_id);
662
    else
663
        p = avcodec_find_decoder(enc->codec_id);
664

    
665
    if (p) {
666
        codec_name = p->name;
667
    } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
668
        /* fake mpeg2 transport stream codec (currently not
669
           registered) */
670
        codec_name = "mpeg2ts";
671
    } else if (enc->codec_name[0] != '\0') {
672
        codec_name = enc->codec_name;
673
    } else {
674
        /* output avi tags */
675
        if(   isprint(enc->codec_tag&0xFF) && isprint((enc->codec_tag>>8)&0xFF)
676
           && isprint((enc->codec_tag>>16)&0xFF) && isprint((enc->codec_tag>>24)&0xFF)){
677
            snprintf(buf1, sizeof(buf1), "%c%c%c%c / 0x%04X",
678
                     enc->codec_tag & 0xff,
679
                     (enc->codec_tag >> 8) & 0xff,
680
                     (enc->codec_tag >> 16) & 0xff,
681
                     (enc->codec_tag >> 24) & 0xff,
682
                      enc->codec_tag);
683
        } else {
684
            snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);
685
        }
686
        codec_name = buf1;
687
    }
688

    
689
    switch(enc->codec_type) {
690
    case CODEC_TYPE_VIDEO:
691
        snprintf(buf, buf_size,
692
                 "Video: %s%s",
693
                 codec_name, enc->mb_decision ? " (hq)" : "");
694
        if (enc->pix_fmt != PIX_FMT_NONE) {
695
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
696
                     ", %s",
697
                     avcodec_get_pix_fmt_name(enc->pix_fmt));
698
        }
699
        if (enc->width) {
700
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
701
                     ", %dx%d",
702
                     enc->width, enc->height);
703
            if (enc->sample_aspect_ratio.num) {
704
                av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
705
                          enc->width*enc->sample_aspect_ratio.num,
706
                          enc->height*enc->sample_aspect_ratio.den,
707
                          1024*1024);
708
                snprintf(buf + strlen(buf), buf_size - strlen(buf),
709
                         " [PAR %d:%d DAR %d:%d]",
710
                         enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
711
                         display_aspect_ratio.num, display_aspect_ratio.den);
712
            }
713
            if(av_log_get_level() >= AV_LOG_DEBUG){
714
                int g= av_gcd(enc->time_base.num, enc->time_base.den);
715
                snprintf(buf + strlen(buf), buf_size - strlen(buf),
716
                     ", %d/%d",
717
                     enc->time_base.num/g, enc->time_base.den/g);
718
            }
719
        }
720
        if (encode) {
721
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
722
                     ", q=%d-%d", enc->qmin, enc->qmax);
723
        }
724
        bitrate = enc->bit_rate;
725
        break;
726
    case CODEC_TYPE_AUDIO:
727
        snprintf(buf, buf_size,
728
                 "Audio: %s",
729
                 codec_name);
730
        if (enc->sample_rate) {
731
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
732
                     ", %d Hz", enc->sample_rate);
733
        }
734
        av_strlcat(buf, ", ", buf_size);
735
        avcodec_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
736
        if (enc->sample_fmt != SAMPLE_FMT_NONE) {
737
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
738
                     ", %s", avcodec_get_sample_fmt_name(enc->sample_fmt));
739
        }
740

    
741
        /* for PCM codecs, compute bitrate directly */
742
        switch(enc->codec_id) {
743
        case CODEC_ID_PCM_F64BE:
744
        case CODEC_ID_PCM_F64LE:
745
            bitrate = enc->sample_rate * enc->channels * 64;
746
            break;
747
        case CODEC_ID_PCM_S32LE:
748
        case CODEC_ID_PCM_S32BE:
749
        case CODEC_ID_PCM_U32LE:
750
        case CODEC_ID_PCM_U32BE:
751
        case CODEC_ID_PCM_F32BE:
752
        case CODEC_ID_PCM_F32LE:
753
            bitrate = enc->sample_rate * enc->channels * 32;
754
            break;
755
        case CODEC_ID_PCM_S24LE:
756
        case CODEC_ID_PCM_S24BE:
757
        case CODEC_ID_PCM_U24LE:
758
        case CODEC_ID_PCM_U24BE:
759
        case CODEC_ID_PCM_S24DAUD:
760
            bitrate = enc->sample_rate * enc->channels * 24;
761
            break;
762
        case CODEC_ID_PCM_S16LE:
763
        case CODEC_ID_PCM_S16BE:
764
        case CODEC_ID_PCM_S16LE_PLANAR:
765
        case CODEC_ID_PCM_U16LE:
766
        case CODEC_ID_PCM_U16BE:
767
            bitrate = enc->sample_rate * enc->channels * 16;
768
            break;
769
        case CODEC_ID_PCM_S8:
770
        case CODEC_ID_PCM_U8:
771
        case CODEC_ID_PCM_ALAW:
772
        case CODEC_ID_PCM_MULAW:
773
        case CODEC_ID_PCM_ZORK:
774
            bitrate = enc->sample_rate * enc->channels * 8;
775
            break;
776
        default:
777
            bitrate = enc->bit_rate;
778
            break;
779
        }
780
        break;
781
    case CODEC_TYPE_DATA:
782
        snprintf(buf, buf_size, "Data: %s", codec_name);
783
        bitrate = enc->bit_rate;
784
        break;
785
    case CODEC_TYPE_SUBTITLE:
786
        snprintf(buf, buf_size, "Subtitle: %s", codec_name);
787
        bitrate = enc->bit_rate;
788
        break;
789
    case CODEC_TYPE_ATTACHMENT:
790
        snprintf(buf, buf_size, "Attachment: %s", codec_name);
791
        bitrate = enc->bit_rate;
792
        break;
793
    default:
794
        snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
795
        return;
796
    }
797
    if (encode) {
798
        if (enc->flags & CODEC_FLAG_PASS1)
799
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
800
                     ", pass 1");
801
        if (enc->flags & CODEC_FLAG_PASS2)
802
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
803
                     ", pass 2");
804
    }
805
    if (bitrate != 0) {
806
        snprintf(buf + strlen(buf), buf_size - strlen(buf),
807
                 ", %d kb/s", bitrate / 1000);
808
    }
809
}
810

    
811
unsigned avcodec_version( void )
812
{
813
  return LIBAVCODEC_VERSION_INT;
814
}
815

    
816
void avcodec_init(void)
817
{
818
    static int initialized = 0;
819

    
820
    if (initialized != 0)
821
        return;
822
    initialized = 1;
823

    
824
    dsputil_static_init();
825
}
826

    
827
void avcodec_flush_buffers(AVCodecContext *avctx)
828
{
829
    if(avctx->codec->flush)
830
        avctx->codec->flush(avctx);
831
}
832

    
833
void avcodec_default_free_buffers(AVCodecContext *s){
834
    int i, j;
835

    
836
    if(s->internal_buffer==NULL) return;
837

    
838
    for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
839
        InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
840
        for(j=0; j<4; j++){
841
            av_freep(&buf->base[j]);
842
            buf->data[j]= NULL;
843
        }
844
    }
845
    av_freep(&s->internal_buffer);
846

    
847
    s->internal_buffer_count=0;
848
}
849

    
850
char av_get_pict_type_char(int pict_type){
851
    switch(pict_type){
852
    case FF_I_TYPE: return 'I';
853
    case FF_P_TYPE: return 'P';
854
    case FF_B_TYPE: return 'B';
855
    case FF_S_TYPE: return 'S';
856
    case FF_SI_TYPE:return 'i';
857
    case FF_SP_TYPE:return 'p';
858
    case FF_BI_TYPE:return 'b';
859
    default:        return '?';
860
    }
861
}
862

    
863
int av_get_bits_per_sample(enum CodecID codec_id){
864
    switch(codec_id){
865
    case CODEC_ID_ADPCM_SBPRO_2:
866
        return 2;
867
    case CODEC_ID_ADPCM_SBPRO_3:
868
        return 3;
869
    case CODEC_ID_ADPCM_SBPRO_4:
870
    case CODEC_ID_ADPCM_CT:
871
        return 4;
872
    case CODEC_ID_PCM_ALAW:
873
    case CODEC_ID_PCM_MULAW:
874
    case CODEC_ID_PCM_S8:
875
    case CODEC_ID_PCM_U8:
876
    case CODEC_ID_PCM_ZORK:
877
        return 8;
878
    case CODEC_ID_PCM_S16BE:
879
    case CODEC_ID_PCM_S16LE:
880
    case CODEC_ID_PCM_S16LE_PLANAR:
881
    case CODEC_ID_PCM_U16BE:
882
    case CODEC_ID_PCM_U16LE:
883
        return 16;
884
    case CODEC_ID_PCM_S24DAUD:
885
    case CODEC_ID_PCM_S24BE:
886
    case CODEC_ID_PCM_S24LE:
887
    case CODEC_ID_PCM_U24BE:
888
    case CODEC_ID_PCM_U24LE:
889
        return 24;
890
    case CODEC_ID_PCM_S32BE:
891
    case CODEC_ID_PCM_S32LE:
892
    case CODEC_ID_PCM_U32BE:
893
    case CODEC_ID_PCM_U32LE:
894
    case CODEC_ID_PCM_F32BE:
895
    case CODEC_ID_PCM_F32LE:
896
        return 32;
897
    case CODEC_ID_PCM_F64BE:
898
    case CODEC_ID_PCM_F64LE:
899
        return 64;
900
    default:
901
        return 0;
902
    }
903
}
904

    
905
int av_get_bits_per_sample_format(enum SampleFormat sample_fmt) {
906
    switch (sample_fmt) {
907
    case SAMPLE_FMT_U8:
908
        return 8;
909
    case SAMPLE_FMT_S16:
910
        return 16;
911
    case SAMPLE_FMT_S32:
912
    case SAMPLE_FMT_FLT:
913
        return 32;
914
    case SAMPLE_FMT_DBL:
915
        return 64;
916
    default:
917
        return 0;
918
    }
919
}
920

    
921
#if !HAVE_THREADS
922
int avcodec_thread_init(AVCodecContext *s, int thread_count){
923
    return -1;
924
}
925
#endif
926

    
927
unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
928
{
929
    unsigned int n = 0;
930

    
931
    while(v >= 0xff) {
932
        *s++ = 0xff;
933
        v -= 0xff;
934
        n++;
935
    }
936
    *s = v;
937
    n++;
938
    return n;
939
}
940

    
941
/* Wrapper to work around the lack of mkstemp() on mingw/cygin.
942
 * Also, tries to create file in /tmp first, if possible.
943
 * *prefix can be a character constant; *filename will be allocated internally.
944
 * Returns file descriptor of opened file (or -1 on error)
945
 * and opened file name in **filename. */
946
int av_tempfile(char *prefix, char **filename) {
947
    int fd=-1;
948
#if !HAVE_MKSTEMP
949
    *filename = tempnam(".", prefix);
950
#else
951
    size_t len = strlen(prefix) + 12; /* room for "/tmp/" and "XXXXXX\0" */
952
    *filename = av_malloc(len);
953
#endif
954
    /* -----common section-----*/
955
    if (*filename == NULL) {
956
        av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot allocate file name\n");
957
        return -1;
958
    }
959
#if !HAVE_MKSTEMP
960
    fd = open(*filename, O_RDWR | O_BINARY | O_CREAT, 0444);
961
#else
962
    snprintf(*filename, len, "/tmp/%sXXXXXX", prefix);
963
    fd = mkstemp(*filename);
964
    if (fd < 0) {
965
        snprintf(*filename, len, "./%sXXXXXX", prefix);
966
        fd = mkstemp(*filename);
967
    }
968
#endif
969
    /* -----common section-----*/
970
    if (fd < 0) {
971
        av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot open temporary file %s\n", *filename);
972
        return -1;
973
    }
974
    return fd; /* success */
975
}
976

    
977
typedef struct {
978
    const char *abbr;
979
    int width, height;
980
} VideoFrameSizeAbbr;
981

    
982
typedef struct {
983
    const char *abbr;
984
    int rate_num, rate_den;
985
} VideoFrameRateAbbr;
986

    
987
static const VideoFrameSizeAbbr video_frame_size_abbrs[] = {
988
    { "ntsc",      720, 480 },
989
    { "pal",       720, 576 },
990
    { "qntsc",     352, 240 }, /* VCD compliant NTSC */
991
    { "qpal",      352, 288 }, /* VCD compliant PAL */
992
    { "sntsc",     640, 480 }, /* square pixel NTSC */
993
    { "spal",      768, 576 }, /* square pixel PAL */
994
    { "film",      352, 240 },
995
    { "ntsc-film", 352, 240 },
996
    { "sqcif",     128,  96 },
997
    { "qcif",      176, 144 },
998
    { "cif",       352, 288 },
999
    { "4cif",      704, 576 },
1000
    { "qqvga",     160, 120 },
1001
    { "qvga",      320, 240 },
1002
    { "vga",       640, 480 },
1003
    { "svga",      800, 600 },
1004
    { "xga",      1024, 768 },
1005
    { "uxga",     1600,1200 },
1006
    { "qxga",     2048,1536 },
1007
    { "sxga",     1280,1024 },
1008
    { "qsxga",    2560,2048 },
1009
    { "hsxga",    5120,4096 },
1010
    { "wvga",      852, 480 },
1011
    { "wxga",     1366, 768 },
1012
    { "wsxga",    1600,1024 },
1013
    { "wuxga",    1920,1200 },
1014
    { "woxga",    2560,1600 },
1015
    { "wqsxga",   3200,2048 },
1016
    { "wquxga",   3840,2400 },
1017
    { "whsxga",   6400,4096 },
1018
    { "whuxga",   7680,4800 },
1019
    { "cga",       320, 200 },
1020
    { "ega",       640, 350 },
1021
    { "hd480",     852, 480 },
1022
    { "hd720",    1280, 720 },
1023
    { "hd1080",   1920,1080 },
1024
};
1025

    
1026
static const VideoFrameRateAbbr video_frame_rate_abbrs[]= {
1027
    { "ntsc",      30000, 1001 },
1028
    { "pal",          25,    1 },
1029
    { "qntsc",     30000, 1001 }, /* VCD compliant NTSC */
1030
    { "qpal",         25,    1 }, /* VCD compliant PAL */
1031
    { "sntsc",     30000, 1001 }, /* square pixel NTSC */
1032
    { "spal",         25,    1 }, /* square pixel PAL */
1033
    { "film",         24,    1 },
1034
    { "ntsc-film", 24000, 1001 },
1035
};
1036

    
1037
int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str)
1038
{
1039
    int i;
1040
    int n = FF_ARRAY_ELEMS(video_frame_size_abbrs);
1041
    char *p;
1042
    int frame_width = 0, frame_height = 0;
1043

    
1044
    for(i=0;i<n;i++) {
1045
        if (!strcmp(video_frame_size_abbrs[i].abbr, str)) {
1046
            frame_width = video_frame_size_abbrs[i].width;
1047
            frame_height = video_frame_size_abbrs[i].height;
1048
            break;
1049
        }
1050
    }
1051
    if (i == n) {
1052
        p = str;
1053
        frame_width = strtol(p, &p, 10);
1054
        if (*p)
1055
            p++;
1056
        frame_height = strtol(p, &p, 10);
1057
    }
1058
    if (frame_width <= 0 || frame_height <= 0)
1059
        return -1;
1060
    *width_ptr = frame_width;
1061
    *height_ptr = frame_height;
1062
    return 0;
1063
}
1064

    
1065
int av_parse_video_frame_rate(AVRational *frame_rate, const char *arg)
1066
{
1067
    int i;
1068
    int n = FF_ARRAY_ELEMS(video_frame_rate_abbrs);
1069
    char* cp;
1070

    
1071
    /* First, we check our abbreviation table */
1072
    for (i = 0; i < n; ++i)
1073
         if (!strcmp(video_frame_rate_abbrs[i].abbr, arg)) {
1074
             frame_rate->num = video_frame_rate_abbrs[i].rate_num;
1075
             frame_rate->den = video_frame_rate_abbrs[i].rate_den;
1076
             return 0;
1077
         }
1078

    
1079
    /* Then, we try to parse it as fraction */
1080
    cp = strchr(arg, '/');
1081
    if (!cp)
1082
        cp = strchr(arg, ':');
1083
    if (cp) {
1084
        char* cpp;
1085
        frame_rate->num = strtol(arg, &cpp, 10);
1086
        if (cpp != arg || cpp == cp)
1087
            frame_rate->den = strtol(cp+1, &cpp, 10);
1088
        else
1089
           frame_rate->num = 0;
1090
    }
1091
    else {
1092
        /* Finally we give up and parse it as double */
1093
        AVRational time_base = av_d2q(strtod(arg, 0), 1001000);
1094
        frame_rate->den = time_base.den;
1095
        frame_rate->num = time_base.num;
1096
    }
1097
    if (!frame_rate->num || !frame_rate->den)
1098
        return -1;
1099
    else
1100
        return 0;
1101
}
1102

    
1103
void ff_log_missing_feature(void *avc, const char *feature, int want_sample)
1104
{
1105
    av_log(avc, AV_LOG_WARNING, "%s not implemented. Update your FFmpeg "
1106
            "version to the newest one from SVN. If the problem still "
1107
            "occurs, it means that your file has a feature which has not "
1108
            "been implemented.", feature);
1109
    if(want_sample)
1110
        ff_log_ask_for_sample(avc, NULL);
1111
    else
1112
        av_log(avc, AV_LOG_WARNING, "\n");
1113
}
1114

    
1115
void ff_log_ask_for_sample(void *avc, const char *msg)
1116
{
1117
    if (msg)
1118
        av_log(avc, AV_LOG_WARNING, "%s ", msg);
1119
    av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
1120
            "of this file to ftp://upload.ffmpeg.org/MPlayer/incoming/ "
1121
            "and contact the ffmpeg-devel mailing list.\n");
1122
}