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ffmpeg / libavcodec / utils.c @ 6059f13c

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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
        if (tmpsize < 0)
275
            return -1;
276

    
277
        for (i=0; i<3 && picture.data[i+1]; i++)
278
            size[i] = picture.data[i+1] - picture.data[i];
279
        size[i] = tmpsize - (picture.data[i] - picture.data[0]);
280

    
281
        buf->last_pic_num= -256*256*256*64;
282
        memset(buf->base, 0, sizeof(buf->base));
283
        memset(buf->data, 0, sizeof(buf->data));
284

    
285
        for(i=0; i<4 && size[i]; i++){
286
            const int h_shift= i==0 ? 0 : h_chroma_shift;
287
            const int v_shift= i==0 ? 0 : v_chroma_shift;
288

    
289
            buf->linesize[i]= picture.linesize[i];
290

    
291
            buf->base[i]= av_malloc(size[i]+16); //FIXME 16
292
            if(buf->base[i]==NULL) return -1;
293
            memset(buf->base[i], 128, size[i]);
294

    
295
            // no edge if EDEG EMU or not planar YUV
296
            if((s->flags&CODEC_FLAG_EMU_EDGE) || !size[2])
297
                buf->data[i] = buf->base[i];
298
            else
299
                buf->data[i] = buf->base[i] + ALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), stride_align[i]);
300
        }
301
        if(size[1] && !size[2])
302
            ff_set_systematic_pal((uint32_t*)buf->data[1], s->pix_fmt);
303
        buf->width  = s->width;
304
        buf->height = s->height;
305
        buf->pix_fmt= s->pix_fmt;
306
        pic->age= 256*256*256*64;
307
    }
308
    pic->type= FF_BUFFER_TYPE_INTERNAL;
309

    
310
    for(i=0; i<4; i++){
311
        pic->base[i]= buf->base[i];
312
        pic->data[i]= buf->data[i];
313
        pic->linesize[i]= buf->linesize[i];
314
    }
315
    s->internal_buffer_count++;
316

    
317
    pic->reordered_opaque= s->reordered_opaque;
318

    
319
    if(s->debug&FF_DEBUG_BUFFERS)
320
        av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
321

    
322
    return 0;
323
}
324

    
325
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
326
    int i;
327
    InternalBuffer *buf, *last;
328

    
329
    assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
330
    assert(s->internal_buffer_count);
331

    
332
    buf = NULL; /* avoids warning */
333
    for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
334
        buf= &((InternalBuffer*)s->internal_buffer)[i];
335
        if(buf->data[0] == pic->data[0])
336
            break;
337
    }
338
    assert(i < s->internal_buffer_count);
339
    s->internal_buffer_count--;
340
    last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
341

    
342
    FFSWAP(InternalBuffer, *buf, *last);
343

    
344
    for(i=0; i<4; i++){
345
        pic->data[i]=NULL;
346
//        pic->base[i]=NULL;
347
    }
348
//printf("R%X\n", pic->opaque);
349

    
350
    if(s->debug&FF_DEBUG_BUFFERS)
351
        av_log(s, AV_LOG_DEBUG, "default_release_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
352
}
353

    
354
int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
355
    AVFrame temp_pic;
356
    int i;
357

    
358
    /* If no picture return a new buffer */
359
    if(pic->data[0] == NULL) {
360
        /* We will copy from buffer, so must be readable */
361
        pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
362
        return s->get_buffer(s, pic);
363
    }
364

    
365
    /* If internal buffer type return the same buffer */
366
    if(pic->type == FF_BUFFER_TYPE_INTERNAL)
367
        return 0;
368

    
369
    /*
370
     * Not internal type and reget_buffer not overridden, emulate cr buffer
371
     */
372
    temp_pic = *pic;
373
    for(i = 0; i < 4; i++)
374
        pic->data[i] = pic->base[i] = NULL;
375
    pic->opaque = NULL;
376
    /* Allocate new frame */
377
    if (s->get_buffer(s, pic))
378
        return -1;
379
    /* Copy image data from old buffer to new buffer */
380
    av_picture_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
381
             s->height);
382
    s->release_buffer(s, &temp_pic); // Release old frame
383
    return 0;
384
}
385

    
386
int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size){
387
    int i;
388

    
389
    for(i=0; i<count; i++){
390
        int r= func(c, (char*)arg + i*size);
391
        if(ret) ret[i]= r;
392
    }
393
    return 0;
394
}
395

    
396
enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat *fmt){
397
    while (*fmt != PIX_FMT_NONE && ff_is_hwaccel_pix_fmt(*fmt))
398
        ++fmt;
399
    return fmt[0];
400
}
401

    
402
void avcodec_get_frame_defaults(AVFrame *pic){
403
    memset(pic, 0, sizeof(AVFrame));
404

    
405
    pic->pts= AV_NOPTS_VALUE;
406
    pic->key_frame= 1;
407
}
408

    
409
AVFrame *avcodec_alloc_frame(void){
410
    AVFrame *pic= av_malloc(sizeof(AVFrame));
411

    
412
    if(pic==NULL) return NULL;
413

    
414
    avcodec_get_frame_defaults(pic);
415

    
416
    return pic;
417
}
418

    
419
int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
420
{
421
    int ret= -1;
422

    
423
    entangled_thread_counter++;
424
    if(entangled_thread_counter != 1){
425
        av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
426
        goto end;
427
    }
428

    
429
    if(avctx->codec || !codec)
430
        goto end;
431

    
432
    if (codec->priv_data_size > 0) {
433
        avctx->priv_data = av_mallocz(codec->priv_data_size);
434
        if (!avctx->priv_data) {
435
            ret = AVERROR(ENOMEM);
436
            goto end;
437
        }
438
    } else {
439
        avctx->priv_data = NULL;
440
    }
441

    
442
    if(avctx->coded_width && avctx->coded_height)
443
        avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
444
    else if(avctx->width && avctx->height)
445
        avcodec_set_dimensions(avctx, avctx->width, avctx->height);
446

    
447
    if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height)){
448
        av_freep(&avctx->priv_data);
449
        ret = AVERROR(EINVAL);
450
        goto end;
451
    }
452

    
453
    avctx->codec = codec;
454
    avctx->codec_id = codec->id;
455
    avctx->frame_number = 0;
456
    if(avctx->codec->init){
457
        ret = avctx->codec->init(avctx);
458
        if (ret < 0) {
459
            av_freep(&avctx->priv_data);
460
            avctx->codec= NULL;
461
            goto end;
462
        }
463
    }
464
    ret=0;
465
end:
466
    entangled_thread_counter--;
467
    return ret;
468
}
469

    
470
int attribute_align_arg avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
471
                         const short *samples)
472
{
473
    if(buf_size < FF_MIN_BUFFER_SIZE && 0){
474
        av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
475
        return -1;
476
    }
477
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || samples){
478
        int ret = avctx->codec->encode(avctx, buf, buf_size, samples);
479
        avctx->frame_number++;
480
        return ret;
481
    }else
482
        return 0;
483
}
484

    
485
int attribute_align_arg avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
486
                         const AVFrame *pict)
487
{
488
    if(buf_size < FF_MIN_BUFFER_SIZE){
489
        av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
490
        return -1;
491
    }
492
    if(avcodec_check_dimensions(avctx,avctx->width,avctx->height))
493
        return -1;
494
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){
495
        int ret = avctx->codec->encode(avctx, buf, buf_size, pict);
496
        avctx->frame_number++;
497
        emms_c(); //needed to avoid an emms_c() call before every return;
498

    
499
        return ret;
500
    }else
501
        return 0;
502
}
503

    
504
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
505
                            const AVSubtitle *sub)
506
{
507
    int ret;
508
    if(sub->start_display_time) {
509
        av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
510
        return -1;
511
    }
512
    if(sub->num_rects == 0 || !sub->rects)
513
        return -1;
514
    ret = avctx->codec->encode(avctx, buf, buf_size, sub);
515
    avctx->frame_number++;
516
    return ret;
517
}
518

    
519
int attribute_align_arg avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
520
                         int *got_picture_ptr,
521
                         const uint8_t *buf, int buf_size)
522
{
523
    int ret;
524

    
525
    *got_picture_ptr= 0;
526
    if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height))
527
        return -1;
528
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || buf_size){
529
        ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
530
                                buf, buf_size);
531

    
532
        emms_c(); //needed to avoid an emms_c() call before every return;
533

    
534
        if (*got_picture_ptr)
535
            avctx->frame_number++;
536
    }else
537
        ret= 0;
538

    
539
    return ret;
540
}
541

    
542
int attribute_align_arg avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
543
                         int *frame_size_ptr,
544
                         const uint8_t *buf, int buf_size)
545
{
546
    int ret;
547

    
548
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || buf_size){
549
        //FIXME remove the check below _after_ ensuring that all audio check that the available space is enough
550
        if(*frame_size_ptr < AVCODEC_MAX_AUDIO_FRAME_SIZE){
551
            av_log(avctx, AV_LOG_ERROR, "buffer smaller than AVCODEC_MAX_AUDIO_FRAME_SIZE\n");
552
            return -1;
553
        }
554
        if(*frame_size_ptr < FF_MIN_BUFFER_SIZE ||
555
        *frame_size_ptr < avctx->channels * avctx->frame_size * sizeof(int16_t)){
556
            av_log(avctx, AV_LOG_ERROR, "buffer %d too small\n", *frame_size_ptr);
557
            return -1;
558
        }
559

    
560
        ret = avctx->codec->decode(avctx, samples, frame_size_ptr,
561
                                buf, buf_size);
562
        avctx->frame_number++;
563
    }else{
564
        ret= 0;
565
        *frame_size_ptr=0;
566
    }
567
    return ret;
568
}
569

    
570
int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
571
                            int *got_sub_ptr,
572
                            const uint8_t *buf, int buf_size)
573
{
574
    int ret;
575

    
576
    *got_sub_ptr = 0;
577
    ret = avctx->codec->decode(avctx, sub, got_sub_ptr,
578
                               buf, buf_size);
579
    if (*got_sub_ptr)
580
        avctx->frame_number++;
581
    return ret;
582
}
583

    
584
int avcodec_close(AVCodecContext *avctx)
585
{
586
    entangled_thread_counter++;
587
    if(entangled_thread_counter != 1){
588
        av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
589
        entangled_thread_counter--;
590
        return -1;
591
    }
592

    
593
    if (HAVE_THREADS && avctx->thread_opaque)
594
        avcodec_thread_free(avctx);
595
    if (avctx->codec->close)
596
        avctx->codec->close(avctx);
597
    avcodec_default_free_buffers(avctx);
598
    av_freep(&avctx->priv_data);
599
    avctx->codec = NULL;
600
    entangled_thread_counter--;
601
    return 0;
602
}
603

    
604
AVCodec *avcodec_find_encoder(enum CodecID id)
605
{
606
    AVCodec *p;
607
    p = first_avcodec;
608
    while (p) {
609
        if (p->encode != NULL && p->id == id)
610
            return p;
611
        p = p->next;
612
    }
613
    return NULL;
614
}
615

    
616
AVCodec *avcodec_find_encoder_by_name(const char *name)
617
{
618
    AVCodec *p;
619
    if (!name)
620
        return NULL;
621
    p = first_avcodec;
622
    while (p) {
623
        if (p->encode != NULL && strcmp(name,p->name) == 0)
624
            return p;
625
        p = p->next;
626
    }
627
    return NULL;
628
}
629

    
630
AVCodec *avcodec_find_decoder(enum CodecID id)
631
{
632
    AVCodec *p;
633
    p = first_avcodec;
634
    while (p) {
635
        if (p->decode != NULL && p->id == id)
636
            return p;
637
        p = p->next;
638
    }
639
    return NULL;
640
}
641

    
642
AVCodec *avcodec_find_decoder_by_name(const char *name)
643
{
644
    AVCodec *p;
645
    if (!name)
646
        return NULL;
647
    p = first_avcodec;
648
    while (p) {
649
        if (p->decode != NULL && strcmp(name,p->name) == 0)
650
            return p;
651
        p = p->next;
652
    }
653
    return NULL;
654
}
655

    
656
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
657
{
658
    const char *codec_name;
659
    AVCodec *p;
660
    char buf1[32];
661
    int bitrate;
662
    AVRational display_aspect_ratio;
663

    
664
    if (encode)
665
        p = avcodec_find_encoder(enc->codec_id);
666
    else
667
        p = avcodec_find_decoder(enc->codec_id);
668

    
669
    if (p) {
670
        codec_name = p->name;
671
    } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
672
        /* fake mpeg2 transport stream codec (currently not
673
           registered) */
674
        codec_name = "mpeg2ts";
675
    } else if (enc->codec_name[0] != '\0') {
676
        codec_name = enc->codec_name;
677
    } else {
678
        /* output avi tags */
679
        if(   isprint(enc->codec_tag&0xFF) && isprint((enc->codec_tag>>8)&0xFF)
680
           && isprint((enc->codec_tag>>16)&0xFF) && isprint((enc->codec_tag>>24)&0xFF)){
681
            snprintf(buf1, sizeof(buf1), "%c%c%c%c / 0x%04X",
682
                     enc->codec_tag & 0xff,
683
                     (enc->codec_tag >> 8) & 0xff,
684
                     (enc->codec_tag >> 16) & 0xff,
685
                     (enc->codec_tag >> 24) & 0xff,
686
                      enc->codec_tag);
687
        } else {
688
            snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);
689
        }
690
        codec_name = buf1;
691
    }
692

    
693
    switch(enc->codec_type) {
694
    case CODEC_TYPE_VIDEO:
695
        snprintf(buf, buf_size,
696
                 "Video: %s%s",
697
                 codec_name, enc->mb_decision ? " (hq)" : "");
698
        if (enc->pix_fmt != PIX_FMT_NONE) {
699
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
700
                     ", %s",
701
                     avcodec_get_pix_fmt_name(enc->pix_fmt));
702
        }
703
        if (enc->width) {
704
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
705
                     ", %dx%d",
706
                     enc->width, enc->height);
707
            if (enc->sample_aspect_ratio.num) {
708
                av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
709
                          enc->width*enc->sample_aspect_ratio.num,
710
                          enc->height*enc->sample_aspect_ratio.den,
711
                          1024*1024);
712
                snprintf(buf + strlen(buf), buf_size - strlen(buf),
713
                         " [PAR %d:%d DAR %d:%d]",
714
                         enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
715
                         display_aspect_ratio.num, display_aspect_ratio.den);
716
            }
717
            if(av_log_get_level() >= AV_LOG_DEBUG){
718
                int g= av_gcd(enc->time_base.num, enc->time_base.den);
719
                snprintf(buf + strlen(buf), buf_size - strlen(buf),
720
                     ", %d/%d",
721
                     enc->time_base.num/g, enc->time_base.den/g);
722
            }
723
        }
724
        if (encode) {
725
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
726
                     ", q=%d-%d", enc->qmin, enc->qmax);
727
        }
728
        bitrate = enc->bit_rate;
729
        break;
730
    case CODEC_TYPE_AUDIO:
731
        snprintf(buf, buf_size,
732
                 "Audio: %s",
733
                 codec_name);
734
        if (enc->sample_rate) {
735
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
736
                     ", %d Hz", enc->sample_rate);
737
        }
738
        av_strlcat(buf, ", ", buf_size);
739
        avcodec_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
740
        if (enc->sample_fmt != SAMPLE_FMT_NONE) {
741
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
742
                     ", %s", avcodec_get_sample_fmt_name(enc->sample_fmt));
743
        }
744

    
745
        /* for PCM codecs, compute bitrate directly */
746
        switch(enc->codec_id) {
747
        case CODEC_ID_PCM_F64BE:
748
        case CODEC_ID_PCM_F64LE:
749
            bitrate = enc->sample_rate * enc->channels * 64;
750
            break;
751
        case CODEC_ID_PCM_S32LE:
752
        case CODEC_ID_PCM_S32BE:
753
        case CODEC_ID_PCM_U32LE:
754
        case CODEC_ID_PCM_U32BE:
755
        case CODEC_ID_PCM_F32BE:
756
        case CODEC_ID_PCM_F32LE:
757
            bitrate = enc->sample_rate * enc->channels * 32;
758
            break;
759
        case CODEC_ID_PCM_S24LE:
760
        case CODEC_ID_PCM_S24BE:
761
        case CODEC_ID_PCM_U24LE:
762
        case CODEC_ID_PCM_U24BE:
763
        case CODEC_ID_PCM_S24DAUD:
764
            bitrate = enc->sample_rate * enc->channels * 24;
765
            break;
766
        case CODEC_ID_PCM_S16LE:
767
        case CODEC_ID_PCM_S16BE:
768
        case CODEC_ID_PCM_S16LE_PLANAR:
769
        case CODEC_ID_PCM_U16LE:
770
        case CODEC_ID_PCM_U16BE:
771
            bitrate = enc->sample_rate * enc->channels * 16;
772
            break;
773
        case CODEC_ID_PCM_S8:
774
        case CODEC_ID_PCM_U8:
775
        case CODEC_ID_PCM_ALAW:
776
        case CODEC_ID_PCM_MULAW:
777
        case CODEC_ID_PCM_ZORK:
778
            bitrate = enc->sample_rate * enc->channels * 8;
779
            break;
780
        default:
781
            bitrate = enc->bit_rate;
782
            break;
783
        }
784
        break;
785
    case CODEC_TYPE_DATA:
786
        snprintf(buf, buf_size, "Data: %s", codec_name);
787
        bitrate = enc->bit_rate;
788
        break;
789
    case CODEC_TYPE_SUBTITLE:
790
        snprintf(buf, buf_size, "Subtitle: %s", codec_name);
791
        bitrate = enc->bit_rate;
792
        break;
793
    case CODEC_TYPE_ATTACHMENT:
794
        snprintf(buf, buf_size, "Attachment: %s", codec_name);
795
        bitrate = enc->bit_rate;
796
        break;
797
    default:
798
        snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
799
        return;
800
    }
801
    if (encode) {
802
        if (enc->flags & CODEC_FLAG_PASS1)
803
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
804
                     ", pass 1");
805
        if (enc->flags & CODEC_FLAG_PASS2)
806
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
807
                     ", pass 2");
808
    }
809
    if (bitrate != 0) {
810
        snprintf(buf + strlen(buf), buf_size - strlen(buf),
811
                 ", %d kb/s", bitrate / 1000);
812
    }
813
}
814

    
815
unsigned avcodec_version( void )
816
{
817
  return LIBAVCODEC_VERSION_INT;
818
}
819

    
820
void avcodec_init(void)
821
{
822
    static int initialized = 0;
823

    
824
    if (initialized != 0)
825
        return;
826
    initialized = 1;
827

    
828
    dsputil_static_init();
829
}
830

    
831
void avcodec_flush_buffers(AVCodecContext *avctx)
832
{
833
    if(avctx->codec->flush)
834
        avctx->codec->flush(avctx);
835
}
836

    
837
void avcodec_default_free_buffers(AVCodecContext *s){
838
    int i, j;
839

    
840
    if(s->internal_buffer==NULL) return;
841

    
842
    for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
843
        InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
844
        for(j=0; j<4; j++){
845
            av_freep(&buf->base[j]);
846
            buf->data[j]= NULL;
847
        }
848
    }
849
    av_freep(&s->internal_buffer);
850

    
851
    s->internal_buffer_count=0;
852
}
853

    
854
char av_get_pict_type_char(int pict_type){
855
    switch(pict_type){
856
    case FF_I_TYPE: return 'I';
857
    case FF_P_TYPE: return 'P';
858
    case FF_B_TYPE: return 'B';
859
    case FF_S_TYPE: return 'S';
860
    case FF_SI_TYPE:return 'i';
861
    case FF_SP_TYPE:return 'p';
862
    case FF_BI_TYPE:return 'b';
863
    default:        return '?';
864
    }
865
}
866

    
867
int av_get_bits_per_sample(enum CodecID codec_id){
868
    switch(codec_id){
869
    case CODEC_ID_ADPCM_SBPRO_2:
870
        return 2;
871
    case CODEC_ID_ADPCM_SBPRO_3:
872
        return 3;
873
    case CODEC_ID_ADPCM_SBPRO_4:
874
    case CODEC_ID_ADPCM_CT:
875
        return 4;
876
    case CODEC_ID_PCM_ALAW:
877
    case CODEC_ID_PCM_MULAW:
878
    case CODEC_ID_PCM_S8:
879
    case CODEC_ID_PCM_U8:
880
    case CODEC_ID_PCM_ZORK:
881
        return 8;
882
    case CODEC_ID_PCM_S16BE:
883
    case CODEC_ID_PCM_S16LE:
884
    case CODEC_ID_PCM_S16LE_PLANAR:
885
    case CODEC_ID_PCM_U16BE:
886
    case CODEC_ID_PCM_U16LE:
887
        return 16;
888
    case CODEC_ID_PCM_S24DAUD:
889
    case CODEC_ID_PCM_S24BE:
890
    case CODEC_ID_PCM_S24LE:
891
    case CODEC_ID_PCM_U24BE:
892
    case CODEC_ID_PCM_U24LE:
893
        return 24;
894
    case CODEC_ID_PCM_S32BE:
895
    case CODEC_ID_PCM_S32LE:
896
    case CODEC_ID_PCM_U32BE:
897
    case CODEC_ID_PCM_U32LE:
898
    case CODEC_ID_PCM_F32BE:
899
    case CODEC_ID_PCM_F32LE:
900
        return 32;
901
    case CODEC_ID_PCM_F64BE:
902
    case CODEC_ID_PCM_F64LE:
903
        return 64;
904
    default:
905
        return 0;
906
    }
907
}
908

    
909
int av_get_bits_per_sample_format(enum SampleFormat sample_fmt) {
910
    switch (sample_fmt) {
911
    case SAMPLE_FMT_U8:
912
        return 8;
913
    case SAMPLE_FMT_S16:
914
        return 16;
915
    case SAMPLE_FMT_S32:
916
    case SAMPLE_FMT_FLT:
917
        return 32;
918
    case SAMPLE_FMT_DBL:
919
        return 64;
920
    default:
921
        return 0;
922
    }
923
}
924

    
925
#if !HAVE_THREADS
926
int avcodec_thread_init(AVCodecContext *s, int thread_count){
927
    return -1;
928
}
929
#endif
930

    
931
unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
932
{
933
    unsigned int n = 0;
934

    
935
    while(v >= 0xff) {
936
        *s++ = 0xff;
937
        v -= 0xff;
938
        n++;
939
    }
940
    *s = v;
941
    n++;
942
    return n;
943
}
944

    
945
/* Wrapper to work around the lack of mkstemp() on mingw/cygin.
946
 * Also, tries to create file in /tmp first, if possible.
947
 * *prefix can be a character constant; *filename will be allocated internally.
948
 * Returns file descriptor of opened file (or -1 on error)
949
 * and opened file name in **filename. */
950
int av_tempfile(char *prefix, char **filename) {
951
    int fd=-1;
952
#if !HAVE_MKSTEMP
953
    *filename = tempnam(".", prefix);
954
#else
955
    size_t len = strlen(prefix) + 12; /* room for "/tmp/" and "XXXXXX\0" */
956
    *filename = av_malloc(len);
957
#endif
958
    /* -----common section-----*/
959
    if (*filename == NULL) {
960
        av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot allocate file name\n");
961
        return -1;
962
    }
963
#if !HAVE_MKSTEMP
964
    fd = open(*filename, O_RDWR | O_BINARY | O_CREAT, 0444);
965
#else
966
    snprintf(*filename, len, "/tmp/%sXXXXXX", prefix);
967
    fd = mkstemp(*filename);
968
    if (fd < 0) {
969
        snprintf(*filename, len, "./%sXXXXXX", prefix);
970
        fd = mkstemp(*filename);
971
    }
972
#endif
973
    /* -----common section-----*/
974
    if (fd < 0) {
975
        av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot open temporary file %s\n", *filename);
976
        return -1;
977
    }
978
    return fd; /* success */
979
}
980

    
981
typedef struct {
982
    const char *abbr;
983
    int width, height;
984
} VideoFrameSizeAbbr;
985

    
986
typedef struct {
987
    const char *abbr;
988
    int rate_num, rate_den;
989
} VideoFrameRateAbbr;
990

    
991
static const VideoFrameSizeAbbr video_frame_size_abbrs[] = {
992
    { "ntsc",      720, 480 },
993
    { "pal",       720, 576 },
994
    { "qntsc",     352, 240 }, /* VCD compliant NTSC */
995
    { "qpal",      352, 288 }, /* VCD compliant PAL */
996
    { "sntsc",     640, 480 }, /* square pixel NTSC */
997
    { "spal",      768, 576 }, /* square pixel PAL */
998
    { "film",      352, 240 },
999
    { "ntsc-film", 352, 240 },
1000
    { "sqcif",     128,  96 },
1001
    { "qcif",      176, 144 },
1002
    { "cif",       352, 288 },
1003
    { "4cif",      704, 576 },
1004
    { "qqvga",     160, 120 },
1005
    { "qvga",      320, 240 },
1006
    { "vga",       640, 480 },
1007
    { "svga",      800, 600 },
1008
    { "xga",      1024, 768 },
1009
    { "uxga",     1600,1200 },
1010
    { "qxga",     2048,1536 },
1011
    { "sxga",     1280,1024 },
1012
    { "qsxga",    2560,2048 },
1013
    { "hsxga",    5120,4096 },
1014
    { "wvga",      852, 480 },
1015
    { "wxga",     1366, 768 },
1016
    { "wsxga",    1600,1024 },
1017
    { "wuxga",    1920,1200 },
1018
    { "woxga",    2560,1600 },
1019
    { "wqsxga",   3200,2048 },
1020
    { "wquxga",   3840,2400 },
1021
    { "whsxga",   6400,4096 },
1022
    { "whuxga",   7680,4800 },
1023
    { "cga",       320, 200 },
1024
    { "ega",       640, 350 },
1025
    { "hd480",     852, 480 },
1026
    { "hd720",    1280, 720 },
1027
    { "hd1080",   1920,1080 },
1028
};
1029

    
1030
static const VideoFrameRateAbbr video_frame_rate_abbrs[]= {
1031
    { "ntsc",      30000, 1001 },
1032
    { "pal",          25,    1 },
1033
    { "qntsc",     30000, 1001 }, /* VCD compliant NTSC */
1034
    { "qpal",         25,    1 }, /* VCD compliant PAL */
1035
    { "sntsc",     30000, 1001 }, /* square pixel NTSC */
1036
    { "spal",         25,    1 }, /* square pixel PAL */
1037
    { "film",         24,    1 },
1038
    { "ntsc-film", 24000, 1001 },
1039
};
1040

    
1041
int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str)
1042
{
1043
    int i;
1044
    int n = FF_ARRAY_ELEMS(video_frame_size_abbrs);
1045
    char *p;
1046
    int frame_width = 0, frame_height = 0;
1047

    
1048
    for(i=0;i<n;i++) {
1049
        if (!strcmp(video_frame_size_abbrs[i].abbr, str)) {
1050
            frame_width = video_frame_size_abbrs[i].width;
1051
            frame_height = video_frame_size_abbrs[i].height;
1052
            break;
1053
        }
1054
    }
1055
    if (i == n) {
1056
        p = str;
1057
        frame_width = strtol(p, &p, 10);
1058
        if (*p)
1059
            p++;
1060
        frame_height = strtol(p, &p, 10);
1061
    }
1062
    if (frame_width <= 0 || frame_height <= 0)
1063
        return -1;
1064
    *width_ptr = frame_width;
1065
    *height_ptr = frame_height;
1066
    return 0;
1067
}
1068

    
1069
int av_parse_video_frame_rate(AVRational *frame_rate, const char *arg)
1070
{
1071
    int i;
1072
    int n = FF_ARRAY_ELEMS(video_frame_rate_abbrs);
1073
    char* cp;
1074

    
1075
    /* First, we check our abbreviation table */
1076
    for (i = 0; i < n; ++i)
1077
         if (!strcmp(video_frame_rate_abbrs[i].abbr, arg)) {
1078
             frame_rate->num = video_frame_rate_abbrs[i].rate_num;
1079
             frame_rate->den = video_frame_rate_abbrs[i].rate_den;
1080
             return 0;
1081
         }
1082

    
1083
    /* Then, we try to parse it as fraction */
1084
    cp = strchr(arg, '/');
1085
    if (!cp)
1086
        cp = strchr(arg, ':');
1087
    if (cp) {
1088
        char* cpp;
1089
        frame_rate->num = strtol(arg, &cpp, 10);
1090
        if (cpp != arg || cpp == cp)
1091
            frame_rate->den = strtol(cp+1, &cpp, 10);
1092
        else
1093
           frame_rate->num = 0;
1094
    }
1095
    else {
1096
        /* Finally we give up and parse it as double */
1097
        AVRational time_base = av_d2q(strtod(arg, 0), 1001000);
1098
        frame_rate->den = time_base.den;
1099
        frame_rate->num = time_base.num;
1100
    }
1101
    if (!frame_rate->num || !frame_rate->den)
1102
        return -1;
1103
    else
1104
        return 0;
1105
}
1106

    
1107
void ff_log_missing_feature(void *avc, const char *feature, int want_sample)
1108
{
1109
    av_log(avc, AV_LOG_WARNING, "%s not implemented. Update your FFmpeg "
1110
            "version to the newest one from SVN. If the problem still "
1111
            "occurs, it means that your file has a feature which has not "
1112
            "been implemented.", feature);
1113
    if(want_sample)
1114
        ff_log_ask_for_sample(avc, NULL);
1115
    else
1116
        av_log(avc, AV_LOG_WARNING, "\n");
1117
}
1118

    
1119
void ff_log_ask_for_sample(void *avc, const char *msg)
1120
{
1121
    if (msg)
1122
        av_log(avc, AV_LOG_WARNING, "%s ", msg);
1123
    av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
1124
            "of this file to ftp://upload.ffmpeg.org/MPlayer/incoming/ "
1125
            "and contact the ffmpeg-devel mailing list.\n");
1126
}
1127

    
1128
static AVHWAccel *first_hwaccel = NULL;
1129

    
1130
void av_register_hwaccel(AVHWAccel *hwaccel)
1131
{
1132
    AVHWAccel **p = &first_hwaccel;
1133
    while (*p)
1134
        p = &(*p)->next;
1135
    *p = hwaccel;
1136
    hwaccel->next = NULL;
1137
}
1138

    
1139
AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel)
1140
{
1141
    return hwaccel ? hwaccel->next : first_hwaccel;
1142
}
1143

    
1144
AVHWAccel *ff_find_hwaccel(enum CodecID codec_id, enum PixelFormat pix_fmt)
1145
{
1146
    AVHWAccel *hwaccel=NULL;
1147

    
1148
    while((hwaccel= av_hwaccel_next(hwaccel))){
1149
        if (   hwaccel->id      == codec_id
1150
            && hwaccel->pix_fmt == pix_fmt)
1151
            return hwaccel;
1152
    }
1153
    return NULL;
1154
}