Statistics
| Branch: | Revision:

ffmpeg / libavcodec / utils.c @ 78acb9e7

History | View | Annotate | Download (32.8 KB)

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 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 <stdlib.h>
40
#include <stdarg.h>
41
#include <limits.h>
42
#include <float.h>
43
#if !defined(HAVE_MKSTEMP)
44
#include <fcntl.h>
45
#endif
46

    
47
const uint8_t ff_reverse[256]={
48
0x00,0x80,0x40,0xC0,0x20,0xA0,0x60,0xE0,0x10,0x90,0x50,0xD0,0x30,0xB0,0x70,0xF0,
49
0x08,0x88,0x48,0xC8,0x28,0xA8,0x68,0xE8,0x18,0x98,0x58,0xD8,0x38,0xB8,0x78,0xF8,
50
0x04,0x84,0x44,0xC4,0x24,0xA4,0x64,0xE4,0x14,0x94,0x54,0xD4,0x34,0xB4,0x74,0xF4,
51
0x0C,0x8C,0x4C,0xCC,0x2C,0xAC,0x6C,0xEC,0x1C,0x9C,0x5C,0xDC,0x3C,0xBC,0x7C,0xFC,
52
0x02,0x82,0x42,0xC2,0x22,0xA2,0x62,0xE2,0x12,0x92,0x52,0xD2,0x32,0xB2,0x72,0xF2,
53
0x0A,0x8A,0x4A,0xCA,0x2A,0xAA,0x6A,0xEA,0x1A,0x9A,0x5A,0xDA,0x3A,0xBA,0x7A,0xFA,
54
0x06,0x86,0x46,0xC6,0x26,0xA6,0x66,0xE6,0x16,0x96,0x56,0xD6,0x36,0xB6,0x76,0xF6,
55
0x0E,0x8E,0x4E,0xCE,0x2E,0xAE,0x6E,0xEE,0x1E,0x9E,0x5E,0xDE,0x3E,0xBE,0x7E,0xFE,
56
0x01,0x81,0x41,0xC1,0x21,0xA1,0x61,0xE1,0x11,0x91,0x51,0xD1,0x31,0xB1,0x71,0xF1,
57
0x09,0x89,0x49,0xC9,0x29,0xA9,0x69,0xE9,0x19,0x99,0x59,0xD9,0x39,0xB9,0x79,0xF9,
58
0x05,0x85,0x45,0xC5,0x25,0xA5,0x65,0xE5,0x15,0x95,0x55,0xD5,0x35,0xB5,0x75,0xF5,
59
0x0D,0x8D,0x4D,0xCD,0x2D,0xAD,0x6D,0xED,0x1D,0x9D,0x5D,0xDD,0x3D,0xBD,0x7D,0xFD,
60
0x03,0x83,0x43,0xC3,0x23,0xA3,0x63,0xE3,0x13,0x93,0x53,0xD3,0x33,0xB3,0x73,0xF3,
61
0x0B,0x8B,0x4B,0xCB,0x2B,0xAB,0x6B,0xEB,0x1B,0x9B,0x5B,0xDB,0x3B,0xBB,0x7B,0xFB,
62
0x07,0x87,0x47,0xC7,0x27,0xA7,0x67,0xE7,0x17,0x97,0x57,0xD7,0x37,0xB7,0x77,0xF7,
63
0x0F,0x8F,0x4F,0xCF,0x2F,0xAF,0x6F,0xEF,0x1F,0x9F,0x5F,0xDF,0x3F,0xBF,0x7F,0xFF,
64
};
65

    
66
static int volatile entangled_thread_counter=0;
67

    
68
void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size)
69
{
70
    if(min_size < *size)
71
        return ptr;
72

    
73
    *size= FFMAX(17*min_size/16 + 32, min_size);
74

    
75
    ptr= av_realloc(ptr, *size);
76
    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
77
        *size= 0;
78

    
79
    return ptr;
80
}
81

    
82
/* encoder management */
83
static AVCodec *first_avcodec = NULL;
84

    
85
AVCodec *av_codec_next(AVCodec *c){
86
    if(c) return c->next;
87
    else  return first_avcodec;
88
}
89

    
90
void register_avcodec(AVCodec *codec)
91
{
92
    AVCodec **p;
93
    avcodec_init();
94
    p = &first_avcodec;
95
    while (*p != NULL) p = &(*p)->next;
96
    *p = codec;
97
    codec->next = NULL;
98
}
99

    
100
void avcodec_set_dimensions(AVCodecContext *s, int width, int height){
101
    s->coded_width = width;
102
    s->coded_height= height;
103
    s->width = -((-width )>>s->lowres);
104
    s->height= -((-height)>>s->lowres);
105
}
106

    
107
typedef struct InternalBuffer{
108
    int last_pic_num;
109
    uint8_t *base[4];
110
    uint8_t *data[4];
111
    int linesize[4];
112
    int width, height;
113
    enum PixelFormat pix_fmt;
114
}InternalBuffer;
115

    
116
#define INTERNAL_BUFFER_SIZE 32
117

    
118
#define ALIGN(x, a) (((x)+(a)-1)&~((a)-1))
119

    
120
void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
121
    int w_align= 1;
122
    int h_align= 1;
123

    
124
    switch(s->pix_fmt){
125
    case PIX_FMT_YUV420P:
126
    case PIX_FMT_YUYV422:
127
    case PIX_FMT_UYVY422:
128
    case PIX_FMT_YUV422P:
129
    case PIX_FMT_YUV444P:
130
    case PIX_FMT_GRAY8:
131
    case PIX_FMT_GRAY16BE:
132
    case PIX_FMT_GRAY16LE:
133
    case PIX_FMT_YUVJ420P:
134
    case PIX_FMT_YUVJ422P:
135
    case PIX_FMT_YUVJ444P:
136
    case PIX_FMT_YUVA420P:
137
        w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
138
        h_align= 16;
139
        break;
140
    case PIX_FMT_YUV411P:
141
    case PIX_FMT_UYYVYY411:
142
        w_align=32;
143
        h_align=8;
144
        break;
145
    case PIX_FMT_YUV410P:
146
        if(s->codec_id == CODEC_ID_SVQ1){
147
            w_align=64;
148
            h_align=64;
149
        }
150
    case PIX_FMT_RGB555:
151
        if(s->codec_id == CODEC_ID_RPZA){
152
            w_align=4;
153
            h_align=4;
154
        }
155
    case PIX_FMT_PAL8:
156
        if(s->codec_id == CODEC_ID_SMC){
157
            w_align=4;
158
            h_align=4;
159
        }
160
        break;
161
    case PIX_FMT_BGR24:
162
        if((s->codec_id == CODEC_ID_MSZH) || (s->codec_id == CODEC_ID_ZLIB)){
163
            w_align=4;
164
            h_align=4;
165
        }
166
        break;
167
    default:
168
        w_align= 1;
169
        h_align= 1;
170
        break;
171
    }
172

    
173
    *width = ALIGN(*width , w_align);
174
    *height= ALIGN(*height, h_align);
175
    if(s->codec_id == CODEC_ID_H264)
176
        *height+=2; // some of the optimized chroma MC reads one line too much
177
}
178

    
179
int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h){
180
    if((int)w>0 && (int)h>0 && (w+128)*(uint64_t)(h+128) < INT_MAX/4)
181
        return 0;
182

    
183
    av_log(av_log_ctx, AV_LOG_ERROR, "picture size invalid (%ux%u)\n", w, h);
184
    return -1;
185
}
186

    
187
int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
188
    int i;
189
    int w= s->width;
190
    int h= s->height;
191
    InternalBuffer *buf;
192
    int *picture_number;
193

    
194
    if(pic->data[0]!=NULL) {
195
        av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n");
196
        return -1;
197
    }
198
    if(s->internal_buffer_count >= INTERNAL_BUFFER_SIZE) {
199
        av_log(s, AV_LOG_ERROR, "internal_buffer_count overflow (missing release_buffer?)\n");
200
        return -1;
201
    }
202

    
203
    if(avcodec_check_dimensions(s,w,h))
204
        return -1;
205

    
206
    if(s->internal_buffer==NULL){
207
        s->internal_buffer= av_mallocz((INTERNAL_BUFFER_SIZE+1)*sizeof(InternalBuffer));
208
    }
209
#if 0
210
    s->internal_buffer= av_fast_realloc(
211
        s->internal_buffer,
212
        &s->internal_buffer_size,
213
        sizeof(InternalBuffer)*FFMAX(99,  s->internal_buffer_count+1)/*FIXME*/
214
        );
215
#endif
216

    
217
    buf= &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
218
    picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE]).last_pic_num; //FIXME ugly hack
219
    (*picture_number)++;
220

    
221
    if(buf->base[0] && (buf->width != w || buf->height != h || buf->pix_fmt != s->pix_fmt)){
222
        for(i=0; i<4; i++){
223
            av_freep(&buf->base[i]);
224
            buf->data[i]= NULL;
225
        }
226
    }
227

    
228
    if(buf->base[0]){
229
        pic->age= *picture_number - buf->last_pic_num;
230
        buf->last_pic_num= *picture_number;
231
    }else{
232
        int h_chroma_shift, v_chroma_shift;
233
        int size[4] = {0};
234
        int tmpsize;
235
        AVPicture picture;
236
        int stride_align[4];
237

    
238
        avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
239

    
240
        avcodec_align_dimensions(s, &w, &h);
241

    
242
        if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
243
            w+= EDGE_WIDTH*2;
244
            h+= EDGE_WIDTH*2;
245
        }
246

    
247
        ff_fill_linesize(&picture, s->pix_fmt, w);
248

    
249
        for (i=0; i<4; i++){
250
//STRIDE_ALIGN is 8 for SSE* but this does not work for SVQ1 chroma planes
251
//we could change STRIDE_ALIGN to 16 for x86/sse but it would increase the
252
//picture size unneccessarily in some cases. The solution here is not
253
//pretty and better ideas are welcome!
254
#ifdef HAVE_MMX
255
            if(s->codec_id == CODEC_ID_SVQ1)
256
                stride_align[i]= 16;
257
            else
258
#endif
259
            stride_align[i] = STRIDE_ALIGN;
260
            picture.linesize[i] = ALIGN(picture.linesize[i], stride_align[i]);
261
        }
262

    
263
        tmpsize = ff_fill_pointer(&picture, NULL, s->pix_fmt, h);
264

    
265
        for (i=0; i<3 && picture.data[i+1]; i++)
266
            size[i] = picture.data[i+1] - picture.data[i];
267
        size[i] = tmpsize - (picture.data[i] - picture.data[0]);
268

    
269
        buf->last_pic_num= -256*256*256*64;
270
        memset(buf->base, 0, sizeof(buf->base));
271
        memset(buf->data, 0, sizeof(buf->data));
272

    
273
        for(i=0; i<4 && size[i]; i++){
274
            const int h_shift= i==0 ? 0 : h_chroma_shift;
275
            const int v_shift= i==0 ? 0 : v_chroma_shift;
276

    
277
            buf->linesize[i]= picture.linesize[i];
278

    
279
            buf->base[i]= av_malloc(size[i]+16); //FIXME 16
280
            if(buf->base[i]==NULL) return -1;
281
            memset(buf->base[i], 128, size[i]);
282

    
283
            // no edge if EDEG EMU or not planar YUV, we check for PAL8 redundantly to protect against a exploitable bug regression ...
284
            if((s->flags&CODEC_FLAG_EMU_EDGE) || (s->pix_fmt == PIX_FMT_PAL8) || !size[2])
285
                buf->data[i] = buf->base[i];
286
            else
287
                buf->data[i] = buf->base[i] + ALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), stride_align[i]);
288
        }
289
        buf->width  = s->width;
290
        buf->height = s->height;
291
        buf->pix_fmt= s->pix_fmt;
292
        pic->age= 256*256*256*64;
293
    }
294
    pic->type= FF_BUFFER_TYPE_INTERNAL;
295

    
296
    for(i=0; i<4; i++){
297
        pic->base[i]= buf->base[i];
298
        pic->data[i]= buf->data[i];
299
        pic->linesize[i]= buf->linesize[i];
300
    }
301
    s->internal_buffer_count++;
302

    
303
    pic->reordered_opaque= s->reordered_opaque;
304

    
305
    if(s->debug&FF_DEBUG_BUFFERS)
306
        av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
307

    
308
    return 0;
309
}
310

    
311
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
312
    int i;
313
    InternalBuffer *buf, *last;
314

    
315
    assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
316
    assert(s->internal_buffer_count);
317

    
318
    buf = NULL; /* avoids warning */
319
    for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
320
        buf= &((InternalBuffer*)s->internal_buffer)[i];
321
        if(buf->data[0] == pic->data[0])
322
            break;
323
    }
324
    assert(i < s->internal_buffer_count);
325
    s->internal_buffer_count--;
326
    last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
327

    
328
    FFSWAP(InternalBuffer, *buf, *last);
329

    
330
    for(i=0; i<4; i++){
331
        pic->data[i]=NULL;
332
//        pic->base[i]=NULL;
333
    }
334
//printf("R%X\n", pic->opaque);
335

    
336
    if(s->debug&FF_DEBUG_BUFFERS)
337
        av_log(s, AV_LOG_DEBUG, "default_release_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
338
}
339

    
340
int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
341
    AVFrame temp_pic;
342
    int i;
343

    
344
    /* If no picture return a new buffer */
345
    if(pic->data[0] == NULL) {
346
        /* We will copy from buffer, so must be readable */
347
        pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
348
        return s->get_buffer(s, pic);
349
    }
350

    
351
    /* If internal buffer type return the same buffer */
352
    if(pic->type == FF_BUFFER_TYPE_INTERNAL)
353
        return 0;
354

    
355
    /*
356
     * Not internal type and reget_buffer not overridden, emulate cr buffer
357
     */
358
    temp_pic = *pic;
359
    for(i = 0; i < 4; i++)
360
        pic->data[i] = pic->base[i] = NULL;
361
    pic->opaque = NULL;
362
    /* Allocate new frame */
363
    if (s->get_buffer(s, pic))
364
        return -1;
365
    /* Copy image data from old buffer to new buffer */
366
    av_picture_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
367
             s->height);
368
    s->release_buffer(s, &temp_pic); // Release old frame
369
    return 0;
370
}
371

    
372
int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size){
373
    int i;
374

    
375
    for(i=0; i<count; i++){
376
        int r= func(c, (char*)arg + i*size);
377
        if(ret) ret[i]= r;
378
    }
379
    return 0;
380
}
381

    
382
enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt){
383
    return fmt[0];
384
}
385

    
386
void avcodec_get_frame_defaults(AVFrame *pic){
387
    memset(pic, 0, sizeof(AVFrame));
388

    
389
    pic->pts= AV_NOPTS_VALUE;
390
    pic->key_frame= 1;
391
}
392

    
393
AVFrame *avcodec_alloc_frame(void){
394
    AVFrame *pic= av_malloc(sizeof(AVFrame));
395

    
396
    if(pic==NULL) return NULL;
397

    
398
    avcodec_get_frame_defaults(pic);
399

    
400
    return pic;
401
}
402

    
403
int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
404
{
405
    int ret= -1;
406

    
407
    entangled_thread_counter++;
408
    if(entangled_thread_counter != 1){
409
        av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
410
        goto end;
411
    }
412

    
413
    if(avctx->codec || !codec)
414
        goto end;
415

    
416
    if (codec->priv_data_size > 0) {
417
        avctx->priv_data = av_mallocz(codec->priv_data_size);
418
        if (!avctx->priv_data) {
419
            ret = AVERROR(ENOMEM);
420
            goto end;
421
        }
422
    } else {
423
        avctx->priv_data = NULL;
424
    }
425

    
426
    if(avctx->coded_width && avctx->coded_height)
427
        avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
428
    else if(avctx->width && avctx->height)
429
        avcodec_set_dimensions(avctx, avctx->width, avctx->height);
430

    
431
    if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height)){
432
        av_freep(&avctx->priv_data);
433
        ret = AVERROR(EINVAL);
434
        goto end;
435
    }
436

    
437
    avctx->codec = codec;
438
    avctx->codec_id = codec->id;
439
    avctx->frame_number = 0;
440
    if(avctx->codec->init){
441
        ret = avctx->codec->init(avctx);
442
        if (ret < 0) {
443
            av_freep(&avctx->priv_data);
444
            avctx->codec= NULL;
445
            goto end;
446
        }
447
    }
448
    ret=0;
449
end:
450
    entangled_thread_counter--;
451
    return ret;
452
}
453

    
454
int attribute_align_arg avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
455
                         const short *samples)
456
{
457
    if(buf_size < FF_MIN_BUFFER_SIZE && 0){
458
        av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
459
        return -1;
460
    }
461
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || samples){
462
        int ret = avctx->codec->encode(avctx, buf, buf_size, (void *)samples);
463
        avctx->frame_number++;
464
        return ret;
465
    }else
466
        return 0;
467
}
468

    
469
int attribute_align_arg avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
470
                         const AVFrame *pict)
471
{
472
    if(buf_size < FF_MIN_BUFFER_SIZE){
473
        av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
474
        return -1;
475
    }
476
    if(avcodec_check_dimensions(avctx,avctx->width,avctx->height))
477
        return -1;
478
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){
479
        int ret = avctx->codec->encode(avctx, buf, buf_size, (void *)pict);
480
        avctx->frame_number++;
481
        emms_c(); //needed to avoid an emms_c() call before every return;
482

    
483
        return ret;
484
    }else
485
        return 0;
486
}
487

    
488
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
489
                            const AVSubtitle *sub)
490
{
491
    int ret;
492
    ret = avctx->codec->encode(avctx, buf, buf_size, (void *)sub);
493
    avctx->frame_number++;
494
    return ret;
495
}
496

    
497
int attribute_align_arg avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
498
                         int *got_picture_ptr,
499
                         const uint8_t *buf, int buf_size)
500
{
501
    int ret;
502

    
503
    *got_picture_ptr= 0;
504
    if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height))
505
        return -1;
506
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || buf_size){
507
        ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
508
                                buf, buf_size);
509

    
510
        emms_c(); //needed to avoid an emms_c() call before every return;
511

    
512
        if (*got_picture_ptr)
513
            avctx->frame_number++;
514
    }else
515
        ret= 0;
516

    
517
    return ret;
518
}
519

    
520
int attribute_align_arg avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
521
                         int *frame_size_ptr,
522
                         const uint8_t *buf, int buf_size)
523
{
524
    int ret;
525

    
526
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || buf_size){
527
        //FIXME remove the check below _after_ ensuring that all audio check that the available space is enough
528
        if(*frame_size_ptr < AVCODEC_MAX_AUDIO_FRAME_SIZE){
529
            av_log(avctx, AV_LOG_ERROR, "buffer smaller than AVCODEC_MAX_AUDIO_FRAME_SIZE\n");
530
            return -1;
531
        }
532
        if(*frame_size_ptr < FF_MIN_BUFFER_SIZE ||
533
        *frame_size_ptr < avctx->channels * avctx->frame_size * sizeof(int16_t)){
534
            av_log(avctx, AV_LOG_ERROR, "buffer %d too small\n", *frame_size_ptr);
535
            return -1;
536
        }
537

    
538
        ret = avctx->codec->decode(avctx, samples, frame_size_ptr,
539
                                buf, buf_size);
540
        avctx->frame_number++;
541
    }else{
542
        ret= 0;
543
        *frame_size_ptr=0;
544
    }
545
    return ret;
546
}
547

    
548
int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
549
                            int *got_sub_ptr,
550
                            const uint8_t *buf, int buf_size)
551
{
552
    int ret;
553

    
554
    *got_sub_ptr = 0;
555
    ret = avctx->codec->decode(avctx, sub, got_sub_ptr,
556
                               buf, buf_size);
557
    if (*got_sub_ptr)
558
        avctx->frame_number++;
559
    return ret;
560
}
561

    
562
int avcodec_close(AVCodecContext *avctx)
563
{
564
    entangled_thread_counter++;
565
    if(entangled_thread_counter != 1){
566
        av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
567
        entangled_thread_counter--;
568
        return -1;
569
    }
570

    
571
    if (ENABLE_THREADS && avctx->thread_opaque)
572
        avcodec_thread_free(avctx);
573
    if (avctx->codec->close)
574
        avctx->codec->close(avctx);
575
    avcodec_default_free_buffers(avctx);
576
    av_freep(&avctx->priv_data);
577
    avctx->codec = NULL;
578
    entangled_thread_counter--;
579
    return 0;
580
}
581

    
582
AVCodec *avcodec_find_encoder(enum CodecID id)
583
{
584
    AVCodec *p;
585
    p = first_avcodec;
586
    while (p) {
587
        if (p->encode != NULL && p->id == id)
588
            return p;
589
        p = p->next;
590
    }
591
    return NULL;
592
}
593

    
594
AVCodec *avcodec_find_encoder_by_name(const char *name)
595
{
596
    AVCodec *p;
597
    if (!name)
598
        return NULL;
599
    p = first_avcodec;
600
    while (p) {
601
        if (p->encode != NULL && strcmp(name,p->name) == 0)
602
            return p;
603
        p = p->next;
604
    }
605
    return NULL;
606
}
607

    
608
AVCodec *avcodec_find_decoder(enum CodecID id)
609
{
610
    AVCodec *p;
611
    p = first_avcodec;
612
    while (p) {
613
        if (p->decode != NULL && p->id == id)
614
            return p;
615
        p = p->next;
616
    }
617
    return NULL;
618
}
619

    
620
AVCodec *avcodec_find_decoder_by_name(const char *name)
621
{
622
    AVCodec *p;
623
    if (!name)
624
        return NULL;
625
    p = first_avcodec;
626
    while (p) {
627
        if (p->decode != NULL && strcmp(name,p->name) == 0)
628
            return p;
629
        p = p->next;
630
    }
631
    return NULL;
632
}
633

    
634
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
635
{
636
    const char *codec_name;
637
    AVCodec *p;
638
    char buf1[32];
639
    int bitrate;
640
    AVRational display_aspect_ratio;
641

    
642
    if (encode)
643
        p = avcodec_find_encoder(enc->codec_id);
644
    else
645
        p = avcodec_find_decoder(enc->codec_id);
646

    
647
    if (p) {
648
        codec_name = p->name;
649
        if (!encode && enc->codec_id == CODEC_ID_MP3) {
650
            if (enc->sub_id == 2)
651
                codec_name = "mp2";
652
            else if (enc->sub_id == 1)
653
                codec_name = "mp1";
654
        }
655
    } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
656
        /* fake mpeg2 transport stream codec (currently not
657
           registered) */
658
        codec_name = "mpeg2ts";
659
    } else if (enc->codec_name[0] != '\0') {
660
        codec_name = enc->codec_name;
661
    } else {
662
        /* output avi tags */
663
        if(   isprint(enc->codec_tag&0xFF) && isprint((enc->codec_tag>>8)&0xFF)
664
           && isprint((enc->codec_tag>>16)&0xFF) && isprint((enc->codec_tag>>24)&0xFF)){
665
            snprintf(buf1, sizeof(buf1), "%c%c%c%c / 0x%04X",
666
                     enc->codec_tag & 0xff,
667
                     (enc->codec_tag >> 8) & 0xff,
668
                     (enc->codec_tag >> 16) & 0xff,
669
                     (enc->codec_tag >> 24) & 0xff,
670
                      enc->codec_tag);
671
        } else {
672
            snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);
673
        }
674
        codec_name = buf1;
675
    }
676

    
677
    switch(enc->codec_type) {
678
    case CODEC_TYPE_VIDEO:
679
        snprintf(buf, buf_size,
680
                 "Video: %s%s",
681
                 codec_name, enc->mb_decision ? " (hq)" : "");
682
        if (enc->pix_fmt != PIX_FMT_NONE) {
683
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
684
                     ", %s",
685
                     avcodec_get_pix_fmt_name(enc->pix_fmt));
686
        }
687
        if (enc->width) {
688
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
689
                     ", %dx%d",
690
                     enc->width, enc->height);
691
            if (enc->sample_aspect_ratio.num) {
692
                av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
693
                          enc->width*enc->sample_aspect_ratio.num,
694
                          enc->height*enc->sample_aspect_ratio.den,
695
                          1024*1024);
696
                snprintf(buf + strlen(buf), buf_size - strlen(buf),
697
                         " [PAR %d:%d DAR %d:%d]",
698
                         enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
699
                         display_aspect_ratio.num, display_aspect_ratio.den);
700
            }
701
            if(av_log_get_level() >= AV_LOG_DEBUG){
702
                int g= ff_gcd(enc->time_base.num, enc->time_base.den);
703
                snprintf(buf + strlen(buf), buf_size - strlen(buf),
704
                     ", %d/%d",
705
                     enc->time_base.num/g, enc->time_base.den/g);
706
            }
707
        }
708
        if (encode) {
709
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
710
                     ", q=%d-%d", enc->qmin, enc->qmax);
711
        }
712
        bitrate = enc->bit_rate;
713
        break;
714
    case CODEC_TYPE_AUDIO:
715
        snprintf(buf, buf_size,
716
                 "Audio: %s",
717
                 codec_name);
718
        if (enc->sample_rate) {
719
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
720
                     ", %d Hz", enc->sample_rate);
721
        }
722
        av_strlcat(buf, ", ", buf_size);
723
        avcodec_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
724
        if (enc->sample_fmt != SAMPLE_FMT_NONE) {
725
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
726
                     ", %s", avcodec_get_sample_fmt_name(enc->sample_fmt));
727
        }
728

    
729
        /* for PCM codecs, compute bitrate directly */
730
        switch(enc->codec_id) {
731
        case CODEC_ID_PCM_F64BE:
732
        case CODEC_ID_PCM_F64LE:
733
            bitrate = enc->sample_rate * enc->channels * 64;
734
            break;
735
        case CODEC_ID_PCM_S32LE:
736
        case CODEC_ID_PCM_S32BE:
737
        case CODEC_ID_PCM_U32LE:
738
        case CODEC_ID_PCM_U32BE:
739
        case CODEC_ID_PCM_F32BE:
740
        case CODEC_ID_PCM_F32LE:
741
            bitrate = enc->sample_rate * enc->channels * 32;
742
            break;
743
        case CODEC_ID_PCM_S24LE:
744
        case CODEC_ID_PCM_S24BE:
745
        case CODEC_ID_PCM_U24LE:
746
        case CODEC_ID_PCM_U24BE:
747
        case CODEC_ID_PCM_S24DAUD:
748
            bitrate = enc->sample_rate * enc->channels * 24;
749
            break;
750
        case CODEC_ID_PCM_S16LE:
751
        case CODEC_ID_PCM_S16BE:
752
        case CODEC_ID_PCM_S16LE_PLANAR:
753
        case CODEC_ID_PCM_U16LE:
754
        case CODEC_ID_PCM_U16BE:
755
            bitrate = enc->sample_rate * enc->channels * 16;
756
            break;
757
        case CODEC_ID_PCM_S8:
758
        case CODEC_ID_PCM_U8:
759
        case CODEC_ID_PCM_ALAW:
760
        case CODEC_ID_PCM_MULAW:
761
        case CODEC_ID_PCM_ZORK:
762
            bitrate = enc->sample_rate * enc->channels * 8;
763
            break;
764
        default:
765
            bitrate = enc->bit_rate;
766
            break;
767
        }
768
        break;
769
    case CODEC_TYPE_DATA:
770
        snprintf(buf, buf_size, "Data: %s", codec_name);
771
        bitrate = enc->bit_rate;
772
        break;
773
    case CODEC_TYPE_SUBTITLE:
774
        snprintf(buf, buf_size, "Subtitle: %s", codec_name);
775
        bitrate = enc->bit_rate;
776
        break;
777
    case CODEC_TYPE_ATTACHMENT:
778
        snprintf(buf, buf_size, "Attachment: %s", codec_name);
779
        bitrate = enc->bit_rate;
780
        break;
781
    default:
782
        snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
783
        return;
784
    }
785
    if (encode) {
786
        if (enc->flags & CODEC_FLAG_PASS1)
787
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
788
                     ", pass 1");
789
        if (enc->flags & CODEC_FLAG_PASS2)
790
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
791
                     ", pass 2");
792
    }
793
    if (bitrate != 0) {
794
        snprintf(buf + strlen(buf), buf_size - strlen(buf),
795
                 ", %d kb/s", bitrate / 1000);
796
    }
797
}
798

    
799
unsigned avcodec_version( void )
800
{
801
  return LIBAVCODEC_VERSION_INT;
802
}
803

    
804
void avcodec_init(void)
805
{
806
    static int initialized = 0;
807

    
808
    if (initialized != 0)
809
        return;
810
    initialized = 1;
811

    
812
    dsputil_static_init();
813
}
814

    
815
void avcodec_flush_buffers(AVCodecContext *avctx)
816
{
817
    if(avctx->codec->flush)
818
        avctx->codec->flush(avctx);
819
}
820

    
821
void avcodec_default_free_buffers(AVCodecContext *s){
822
    int i, j;
823

    
824
    if(s->internal_buffer==NULL) return;
825

    
826
    for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
827
        InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
828
        for(j=0; j<4; j++){
829
            av_freep(&buf->base[j]);
830
            buf->data[j]= NULL;
831
        }
832
    }
833
    av_freep(&s->internal_buffer);
834

    
835
    s->internal_buffer_count=0;
836
}
837

    
838
char av_get_pict_type_char(int pict_type){
839
    switch(pict_type){
840
    case FF_I_TYPE: return 'I';
841
    case FF_P_TYPE: return 'P';
842
    case FF_B_TYPE: return 'B';
843
    case FF_S_TYPE: return 'S';
844
    case FF_SI_TYPE:return 'i';
845
    case FF_SP_TYPE:return 'p';
846
    case FF_BI_TYPE:return 'b';
847
    default:        return '?';
848
    }
849
}
850

    
851
int av_get_bits_per_sample(enum CodecID codec_id){
852
    switch(codec_id){
853
    case CODEC_ID_ADPCM_SBPRO_2:
854
        return 2;
855
    case CODEC_ID_ADPCM_SBPRO_3:
856
        return 3;
857
    case CODEC_ID_ADPCM_SBPRO_4:
858
    case CODEC_ID_ADPCM_CT:
859
        return 4;
860
    case CODEC_ID_PCM_ALAW:
861
    case CODEC_ID_PCM_MULAW:
862
    case CODEC_ID_PCM_S8:
863
    case CODEC_ID_PCM_U8:
864
    case CODEC_ID_PCM_ZORK:
865
        return 8;
866
    case CODEC_ID_PCM_S16BE:
867
    case CODEC_ID_PCM_S16LE:
868
    case CODEC_ID_PCM_S16LE_PLANAR:
869
    case CODEC_ID_PCM_U16BE:
870
    case CODEC_ID_PCM_U16LE:
871
        return 16;
872
    case CODEC_ID_PCM_S24DAUD:
873
    case CODEC_ID_PCM_S24BE:
874
    case CODEC_ID_PCM_S24LE:
875
    case CODEC_ID_PCM_U24BE:
876
    case CODEC_ID_PCM_U24LE:
877
        return 24;
878
    case CODEC_ID_PCM_S32BE:
879
    case CODEC_ID_PCM_S32LE:
880
    case CODEC_ID_PCM_U32BE:
881
    case CODEC_ID_PCM_U32LE:
882
    case CODEC_ID_PCM_F32BE:
883
    case CODEC_ID_PCM_F32LE:
884
        return 32;
885
    case CODEC_ID_PCM_F64BE:
886
    case CODEC_ID_PCM_F64LE:
887
        return 64;
888
    default:
889
        return 0;
890
    }
891
}
892

    
893
int av_get_bits_per_sample_format(enum SampleFormat sample_fmt) {
894
    switch (sample_fmt) {
895
    case SAMPLE_FMT_U8:
896
        return 8;
897
    case SAMPLE_FMT_S16:
898
        return 16;
899
    case SAMPLE_FMT_S32:
900
    case SAMPLE_FMT_FLT:
901
        return 32;
902
    case SAMPLE_FMT_DBL:
903
        return 64;
904
    default:
905
        return 0;
906
    }
907
}
908

    
909
#if !defined(HAVE_THREADS)
910
int avcodec_thread_init(AVCodecContext *s, int thread_count){
911
    return -1;
912
}
913
#endif
914

    
915
unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
916
{
917
    unsigned int n = 0;
918

    
919
    while(v >= 0xff) {
920
        *s++ = 0xff;
921
        v -= 0xff;
922
        n++;
923
    }
924
    *s = v;
925
    n++;
926
    return n;
927
}
928

    
929
/* Wrapper to work around the lack of mkstemp() on mingw/cygin.
930
 * Also, tries to create file in /tmp first, if possible.
931
 * *prefix can be a character constant; *filename will be allocated internally.
932
 * Returns file descriptor of opened file (or -1 on error)
933
 * and opened file name in **filename. */
934
int av_tempfile(char *prefix, char **filename) {
935
    int fd=-1;
936
#if !defined(HAVE_MKSTEMP)
937
    *filename = tempnam(".", prefix);
938
#else
939
    size_t len = strlen(prefix) + 12; /* room for "/tmp/" and "XXXXXX\0" */
940
    *filename = av_malloc(len);
941
#endif
942
    /* -----common section-----*/
943
    if (*filename == NULL) {
944
        av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot allocate file name\n");
945
        return -1;
946
    }
947
#if !defined(HAVE_MKSTEMP)
948
    fd = open(*filename, O_RDWR | O_BINARY | O_CREAT, 0444);
949
#else
950
    snprintf(*filename, len, "/tmp/%sXXXXXX", prefix);
951
    fd = mkstemp(*filename);
952
    if (fd < 0) {
953
        snprintf(*filename, len, "./%sXXXXXX", prefix);
954
        fd = mkstemp(*filename);
955
    }
956
#endif
957
    /* -----common section-----*/
958
    if (fd < 0) {
959
        av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot open temporary file %s\n", *filename);
960
        return -1;
961
    }
962
    return fd; /* success */
963
}
964

    
965
typedef struct {
966
    const char *abbr;
967
    int width, height;
968
} VideoFrameSizeAbbr;
969

    
970
typedef struct {
971
    const char *abbr;
972
    int rate_num, rate_den;
973
} VideoFrameRateAbbr;
974

    
975
static const VideoFrameSizeAbbr video_frame_size_abbrs[] = {
976
    { "ntsc",      720, 480 },
977
    { "pal",       720, 576 },
978
    { "qntsc",     352, 240 }, /* VCD compliant NTSC */
979
    { "qpal",      352, 288 }, /* VCD compliant PAL */
980
    { "sntsc",     640, 480 }, /* square pixel NTSC */
981
    { "spal",      768, 576 }, /* square pixel PAL */
982
    { "film",      352, 240 },
983
    { "ntsc-film", 352, 240 },
984
    { "sqcif",     128,  96 },
985
    { "qcif",      176, 144 },
986
    { "cif",       352, 288 },
987
    { "4cif",      704, 576 },
988
    { "qqvga",     160, 120 },
989
    { "qvga",      320, 240 },
990
    { "vga",       640, 480 },
991
    { "svga",      800, 600 },
992
    { "xga",      1024, 768 },
993
    { "uxga",     1600,1200 },
994
    { "qxga",     2048,1536 },
995
    { "sxga",     1280,1024 },
996
    { "qsxga",    2560,2048 },
997
    { "hsxga",    5120,4096 },
998
    { "wvga",      852, 480 },
999
    { "wxga",     1366, 768 },
1000
    { "wsxga",    1600,1024 },
1001
    { "wuxga",    1920,1200 },
1002
    { "woxga",    2560,1600 },
1003
    { "wqsxga",   3200,2048 },
1004
    { "wquxga",   3840,2400 },
1005
    { "whsxga",   6400,4096 },
1006
    { "whuxga",   7680,4800 },
1007
    { "cga",       320, 200 },
1008
    { "ega",       640, 350 },
1009
    { "hd480",     852, 480 },
1010
    { "hd720",    1280, 720 },
1011
    { "hd1080",   1920,1080 },
1012
};
1013

    
1014
static const VideoFrameRateAbbr video_frame_rate_abbrs[]= {
1015
    { "ntsc",      30000, 1001 },
1016
    { "pal",          25,    1 },
1017
    { "qntsc",     30000, 1001 }, /* VCD compliant NTSC */
1018
    { "qpal",         25,    1 }, /* VCD compliant PAL */
1019
    { "sntsc",     30000, 1001 }, /* square pixel NTSC */
1020
    { "spal",         25,    1 }, /* square pixel PAL */
1021
    { "film",         24,    1 },
1022
    { "ntsc-film", 24000, 1001 },
1023
};
1024

    
1025
int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str)
1026
{
1027
    int i;
1028
    int n = FF_ARRAY_ELEMS(video_frame_size_abbrs);
1029
    const char *p;
1030
    int frame_width = 0, frame_height = 0;
1031

    
1032
    for(i=0;i<n;i++) {
1033
        if (!strcmp(video_frame_size_abbrs[i].abbr, str)) {
1034
            frame_width = video_frame_size_abbrs[i].width;
1035
            frame_height = video_frame_size_abbrs[i].height;
1036
            break;
1037
        }
1038
    }
1039
    if (i == n) {
1040
        p = str;
1041
        frame_width = strtol(p, (char **)&p, 10);
1042
        if (*p)
1043
            p++;
1044
        frame_height = strtol(p, (char **)&p, 10);
1045
    }
1046
    if (frame_width <= 0 || frame_height <= 0)
1047
        return -1;
1048
    *width_ptr = frame_width;
1049
    *height_ptr = frame_height;
1050
    return 0;
1051
}
1052

    
1053
int av_parse_video_frame_rate(AVRational *frame_rate, const char *arg)
1054
{
1055
    int i;
1056
    int n = FF_ARRAY_ELEMS(video_frame_rate_abbrs);
1057
    char* cp;
1058

    
1059
    /* First, we check our abbreviation table */
1060
    for (i = 0; i < n; ++i)
1061
         if (!strcmp(video_frame_rate_abbrs[i].abbr, arg)) {
1062
             frame_rate->num = video_frame_rate_abbrs[i].rate_num;
1063
             frame_rate->den = video_frame_rate_abbrs[i].rate_den;
1064
             return 0;
1065
         }
1066

    
1067
    /* Then, we try to parse it as fraction */
1068
    cp = strchr(arg, '/');
1069
    if (!cp)
1070
        cp = strchr(arg, ':');
1071
    if (cp) {
1072
        char* cpp;
1073
        frame_rate->num = strtol(arg, &cpp, 10);
1074
        if (cpp != arg || cpp == cp)
1075
            frame_rate->den = strtol(cp+1, &cpp, 10);
1076
        else
1077
           frame_rate->num = 0;
1078
    }
1079
    else {
1080
        /* Finally we give up and parse it as double */
1081
        AVRational time_base = av_d2q(strtod(arg, 0), 1001000);
1082
        frame_rate->den = time_base.den;
1083
        frame_rate->num = time_base.num;
1084
    }
1085
    if (!frame_rate->num || !frame_rate->den)
1086
        return -1;
1087
    else
1088
        return 0;
1089
}
1090

    
1091
void ff_log_missing_feature(void *avc, const char *feature, int want_sample)
1092
{
1093
    av_log(avc, AV_LOG_WARNING, "%s not implemented. Update your FFmpeg "
1094
            "version to the newest one from SVN. If the problem still "
1095
            "occurs, it means that your file has a feature which has not "
1096
            "been implemented.", feature);
1097
    if(want_sample)
1098
        av_log(avc, AV_LOG_WARNING, " If you want to help, upload a sample "
1099
                "of this file to ftp://upload.ffmpeg.org/MPlayer/incoming/ "
1100
                "and contact the ffmpeg-devel mailing list.");
1101
    av_log(avc, AV_LOG_WARNING, "\n");
1102
}