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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
        int unaligned;
246
        AVPicture picture;
247
        int stride_align[4];
248

    
249
        avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
250

    
251
        avcodec_align_dimensions(s, &w, &h);
252

    
253
        if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
254
            w+= EDGE_WIDTH*2;
255
            h+= EDGE_WIDTH*2;
256
        }
257

    
258
        do {
259
            // NOTE: do not align linesizes individually, this breaks e.g. assumptions
260
            // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
261
        ff_fill_linesize(&picture, s->pix_fmt, w);
262
            // increase alignment of w for next try (rhs gives the lowest bit set in w)
263
            w += w & ~(w-1);
264

    
265
            unaligned = 0;
266
        for (i=0; i<4; i++){
267
//STRIDE_ALIGN is 8 for SSE* but this does not work for SVQ1 chroma planes
268
//we could change STRIDE_ALIGN to 16 for x86/sse but it would increase the
269
//picture size unneccessarily in some cases. The solution here is not
270
//pretty and better ideas are welcome!
271
#if HAVE_MMX
272
            if(s->codec_id == CODEC_ID_SVQ1)
273
                stride_align[i]= 16;
274
            else
275
#endif
276
            stride_align[i] = STRIDE_ALIGN;
277
                unaligned |= picture.linesize[i] % stride_align[i];
278
        }
279
        } while (unaligned);
280

    
281
        tmpsize = ff_fill_pointer(&picture, NULL, s->pix_fmt, h);
282
        if (tmpsize < 0)
283
            return -1;
284

    
285
        for (i=0; i<3 && picture.data[i+1]; i++)
286
            size[i] = picture.data[i+1] - picture.data[i];
287
        size[i] = tmpsize - (picture.data[i] - picture.data[0]);
288

    
289
        buf->last_pic_num= -256*256*256*64;
290
        memset(buf->base, 0, sizeof(buf->base));
291
        memset(buf->data, 0, sizeof(buf->data));
292

    
293
        for(i=0; i<4 && size[i]; i++){
294
            const int h_shift= i==0 ? 0 : h_chroma_shift;
295
            const int v_shift= i==0 ? 0 : v_chroma_shift;
296

    
297
            buf->linesize[i]= picture.linesize[i];
298

    
299
            buf->base[i]= av_malloc(size[i]+16); //FIXME 16
300
            if(buf->base[i]==NULL) return -1;
301
            memset(buf->base[i], 128, size[i]);
302

    
303
            // no edge if EDEG EMU or not planar YUV
304
            if((s->flags&CODEC_FLAG_EMU_EDGE) || !size[2])
305
                buf->data[i] = buf->base[i];
306
            else
307
                buf->data[i] = buf->base[i] + ALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), stride_align[i]);
308
        }
309
        if(size[1] && !size[2])
310
            ff_set_systematic_pal((uint32_t*)buf->data[1], s->pix_fmt);
311
        buf->width  = s->width;
312
        buf->height = s->height;
313
        buf->pix_fmt= s->pix_fmt;
314
        pic->age= 256*256*256*64;
315
    }
316
    pic->type= FF_BUFFER_TYPE_INTERNAL;
317

    
318
    for(i=0; i<4; i++){
319
        pic->base[i]= buf->base[i];
320
        pic->data[i]= buf->data[i];
321
        pic->linesize[i]= buf->linesize[i];
322
    }
323
    s->internal_buffer_count++;
324

    
325
    pic->reordered_opaque= s->reordered_opaque;
326

    
327
    if(s->debug&FF_DEBUG_BUFFERS)
328
        av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
329

    
330
    return 0;
331
}
332

    
333
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
334
    int i;
335
    InternalBuffer *buf, *last;
336

    
337
    assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
338
    assert(s->internal_buffer_count);
339

    
340
    buf = NULL; /* avoids warning */
341
    for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
342
        buf= &((InternalBuffer*)s->internal_buffer)[i];
343
        if(buf->data[0] == pic->data[0])
344
            break;
345
    }
346
    assert(i < s->internal_buffer_count);
347
    s->internal_buffer_count--;
348
    last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
349

    
350
    FFSWAP(InternalBuffer, *buf, *last);
351

    
352
    for(i=0; i<4; i++){
353
        pic->data[i]=NULL;
354
//        pic->base[i]=NULL;
355
    }
356
//printf("R%X\n", pic->opaque);
357

    
358
    if(s->debug&FF_DEBUG_BUFFERS)
359
        av_log(s, AV_LOG_DEBUG, "default_release_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
360
}
361

    
362
int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
363
    AVFrame temp_pic;
364
    int i;
365

    
366
    /* If no picture return a new buffer */
367
    if(pic->data[0] == NULL) {
368
        /* We will copy from buffer, so must be readable */
369
        pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
370
        return s->get_buffer(s, pic);
371
    }
372

    
373
    /* If internal buffer type return the same buffer */
374
    if(pic->type == FF_BUFFER_TYPE_INTERNAL)
375
        return 0;
376

    
377
    /*
378
     * Not internal type and reget_buffer not overridden, emulate cr buffer
379
     */
380
    temp_pic = *pic;
381
    for(i = 0; i < 4; i++)
382
        pic->data[i] = pic->base[i] = NULL;
383
    pic->opaque = NULL;
384
    /* Allocate new frame */
385
    if (s->get_buffer(s, pic))
386
        return -1;
387
    /* Copy image data from old buffer to new buffer */
388
    av_picture_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
389
             s->height);
390
    s->release_buffer(s, &temp_pic); // Release old frame
391
    return 0;
392
}
393

    
394
int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size){
395
    int i;
396

    
397
    for(i=0; i<count; i++){
398
        int r= func(c, (char*)arg + i*size);
399
        if(ret) ret[i]= r;
400
    }
401
    return 0;
402
}
403

    
404
enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat *fmt){
405
    while (*fmt != PIX_FMT_NONE && ff_is_hwaccel_pix_fmt(*fmt))
406
        ++fmt;
407
    return fmt[0];
408
}
409

    
410
void avcodec_get_frame_defaults(AVFrame *pic){
411
    memset(pic, 0, sizeof(AVFrame));
412

    
413
    pic->pts= AV_NOPTS_VALUE;
414
    pic->key_frame= 1;
415
}
416

    
417
AVFrame *avcodec_alloc_frame(void){
418
    AVFrame *pic= av_malloc(sizeof(AVFrame));
419

    
420
    if(pic==NULL) return NULL;
421

    
422
    avcodec_get_frame_defaults(pic);
423

    
424
    return pic;
425
}
426

    
427
int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
428
{
429
    int ret= -1;
430

    
431
    entangled_thread_counter++;
432
    if(entangled_thread_counter != 1){
433
        av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
434
        goto end;
435
    }
436

    
437
    if(avctx->codec || !codec)
438
        goto end;
439

    
440
    if (codec->priv_data_size > 0) {
441
        avctx->priv_data = av_mallocz(codec->priv_data_size);
442
        if (!avctx->priv_data) {
443
            ret = AVERROR(ENOMEM);
444
            goto end;
445
        }
446
    } else {
447
        avctx->priv_data = NULL;
448
    }
449

    
450
    if(avctx->coded_width && avctx->coded_height)
451
        avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
452
    else if(avctx->width && avctx->height)
453
        avcodec_set_dimensions(avctx, avctx->width, avctx->height);
454

    
455
    if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height)){
456
        av_freep(&avctx->priv_data);
457
        ret = AVERROR(EINVAL);
458
        goto end;
459
    }
460

    
461
    avctx->codec = codec;
462
    avctx->codec_id = codec->id;
463
    avctx->frame_number = 0;
464
    if(avctx->codec->init){
465
        ret = avctx->codec->init(avctx);
466
        if (ret < 0) {
467
            av_freep(&avctx->priv_data);
468
            avctx->codec= NULL;
469
            goto end;
470
        }
471
    }
472
    ret=0;
473
end:
474
    entangled_thread_counter--;
475
    return ret;
476
}
477

    
478
int attribute_align_arg avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
479
                         const short *samples)
480
{
481
    if(buf_size < FF_MIN_BUFFER_SIZE && 0){
482
        av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
483
        return -1;
484
    }
485
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || samples){
486
        int ret = avctx->codec->encode(avctx, buf, buf_size, samples);
487
        avctx->frame_number++;
488
        return ret;
489
    }else
490
        return 0;
491
}
492

    
493
int attribute_align_arg avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
494
                         const AVFrame *pict)
495
{
496
    if(buf_size < FF_MIN_BUFFER_SIZE){
497
        av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
498
        return -1;
499
    }
500
    if(avcodec_check_dimensions(avctx,avctx->width,avctx->height))
501
        return -1;
502
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){
503
        int ret = avctx->codec->encode(avctx, buf, buf_size, pict);
504
        avctx->frame_number++;
505
        emms_c(); //needed to avoid an emms_c() call before every return;
506

    
507
        return ret;
508
    }else
509
        return 0;
510
}
511

    
512
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
513
                            const AVSubtitle *sub)
514
{
515
    int ret;
516
    if(sub->start_display_time) {
517
        av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
518
        return -1;
519
    }
520
    if(sub->num_rects == 0 || !sub->rects)
521
        return -1;
522
    ret = avctx->codec->encode(avctx, buf, buf_size, sub);
523
    avctx->frame_number++;
524
    return ret;
525
}
526

    
527
int attribute_align_arg avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
528
                         int *got_picture_ptr,
529
                         const uint8_t *buf, int buf_size)
530
{
531
    int ret;
532

    
533
    *got_picture_ptr= 0;
534
    if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height))
535
        return -1;
536
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || buf_size){
537
        ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
538
                                buf, buf_size);
539

    
540
        emms_c(); //needed to avoid an emms_c() call before every return;
541

    
542
        if (*got_picture_ptr)
543
            avctx->frame_number++;
544
    }else
545
        ret= 0;
546

    
547
    return ret;
548
}
549

    
550
int attribute_align_arg avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
551
                         int *frame_size_ptr,
552
                         const uint8_t *buf, int buf_size)
553
{
554
    int ret;
555

    
556
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || buf_size){
557
        //FIXME remove the check below _after_ ensuring that all audio check that the available space is enough
558
        if(*frame_size_ptr < AVCODEC_MAX_AUDIO_FRAME_SIZE){
559
            av_log(avctx, AV_LOG_ERROR, "buffer smaller than AVCODEC_MAX_AUDIO_FRAME_SIZE\n");
560
            return -1;
561
        }
562
        if(*frame_size_ptr < FF_MIN_BUFFER_SIZE ||
563
        *frame_size_ptr < avctx->channels * avctx->frame_size * sizeof(int16_t)){
564
            av_log(avctx, AV_LOG_ERROR, "buffer %d too small\n", *frame_size_ptr);
565
            return -1;
566
        }
567

    
568
        ret = avctx->codec->decode(avctx, samples, frame_size_ptr,
569
                                buf, buf_size);
570
        avctx->frame_number++;
571
    }else{
572
        ret= 0;
573
        *frame_size_ptr=0;
574
    }
575
    return ret;
576
}
577

    
578
int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
579
                            int *got_sub_ptr,
580
                            const uint8_t *buf, int buf_size)
581
{
582
    int ret;
583

    
584
    *got_sub_ptr = 0;
585
    ret = avctx->codec->decode(avctx, sub, got_sub_ptr,
586
                               buf, buf_size);
587
    if (*got_sub_ptr)
588
        avctx->frame_number++;
589
    return ret;
590
}
591

    
592
int avcodec_close(AVCodecContext *avctx)
593
{
594
    entangled_thread_counter++;
595
    if(entangled_thread_counter != 1){
596
        av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
597
        entangled_thread_counter--;
598
        return -1;
599
    }
600

    
601
    if (HAVE_THREADS && avctx->thread_opaque)
602
        avcodec_thread_free(avctx);
603
    if (avctx->codec->close)
604
        avctx->codec->close(avctx);
605
    avcodec_default_free_buffers(avctx);
606
    av_freep(&avctx->priv_data);
607
    avctx->codec = NULL;
608
    entangled_thread_counter--;
609
    return 0;
610
}
611

    
612
AVCodec *avcodec_find_encoder(enum CodecID id)
613
{
614
    AVCodec *p;
615
    p = first_avcodec;
616
    while (p) {
617
        if (p->encode != NULL && p->id == id)
618
            return p;
619
        p = p->next;
620
    }
621
    return NULL;
622
}
623

    
624
AVCodec *avcodec_find_encoder_by_name(const char *name)
625
{
626
    AVCodec *p;
627
    if (!name)
628
        return NULL;
629
    p = first_avcodec;
630
    while (p) {
631
        if (p->encode != NULL && strcmp(name,p->name) == 0)
632
            return p;
633
        p = p->next;
634
    }
635
    return NULL;
636
}
637

    
638
AVCodec *avcodec_find_decoder(enum CodecID id)
639
{
640
    AVCodec *p;
641
    p = first_avcodec;
642
    while (p) {
643
        if (p->decode != NULL && p->id == id)
644
            return p;
645
        p = p->next;
646
    }
647
    return NULL;
648
}
649

    
650
AVCodec *avcodec_find_decoder_by_name(const char *name)
651
{
652
    AVCodec *p;
653
    if (!name)
654
        return NULL;
655
    p = first_avcodec;
656
    while (p) {
657
        if (p->decode != NULL && strcmp(name,p->name) == 0)
658
            return p;
659
        p = p->next;
660
    }
661
    return NULL;
662
}
663

    
664
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
665
{
666
    const char *codec_name;
667
    AVCodec *p;
668
    char buf1[32];
669
    int bitrate;
670
    AVRational display_aspect_ratio;
671

    
672
    if (encode)
673
        p = avcodec_find_encoder(enc->codec_id);
674
    else
675
        p = avcodec_find_decoder(enc->codec_id);
676

    
677
    if (p) {
678
        codec_name = p->name;
679
    } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
680
        /* fake mpeg2 transport stream codec (currently not
681
           registered) */
682
        codec_name = "mpeg2ts";
683
    } else if (enc->codec_name[0] != '\0') {
684
        codec_name = enc->codec_name;
685
    } else {
686
        /* output avi tags */
687
        if(   isprint(enc->codec_tag&0xFF) && isprint((enc->codec_tag>>8)&0xFF)
688
           && isprint((enc->codec_tag>>16)&0xFF) && isprint((enc->codec_tag>>24)&0xFF)){
689
            snprintf(buf1, sizeof(buf1), "%c%c%c%c / 0x%04X",
690
                     enc->codec_tag & 0xff,
691
                     (enc->codec_tag >> 8) & 0xff,
692
                     (enc->codec_tag >> 16) & 0xff,
693
                     (enc->codec_tag >> 24) & 0xff,
694
                      enc->codec_tag);
695
        } else {
696
            snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);
697
        }
698
        codec_name = buf1;
699
    }
700

    
701
    switch(enc->codec_type) {
702
    case CODEC_TYPE_VIDEO:
703
        snprintf(buf, buf_size,
704
                 "Video: %s%s",
705
                 codec_name, enc->mb_decision ? " (hq)" : "");
706
        if (enc->pix_fmt != PIX_FMT_NONE) {
707
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
708
                     ", %s",
709
                     avcodec_get_pix_fmt_name(enc->pix_fmt));
710
        }
711
        if (enc->width) {
712
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
713
                     ", %dx%d",
714
                     enc->width, enc->height);
715
            if (enc->sample_aspect_ratio.num) {
716
                av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
717
                          enc->width*enc->sample_aspect_ratio.num,
718
                          enc->height*enc->sample_aspect_ratio.den,
719
                          1024*1024);
720
                snprintf(buf + strlen(buf), buf_size - strlen(buf),
721
                         " [PAR %d:%d DAR %d:%d]",
722
                         enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
723
                         display_aspect_ratio.num, display_aspect_ratio.den);
724
            }
725
            if(av_log_get_level() >= AV_LOG_DEBUG){
726
                int g= av_gcd(enc->time_base.num, enc->time_base.den);
727
                snprintf(buf + strlen(buf), buf_size - strlen(buf),
728
                     ", %d/%d",
729
                     enc->time_base.num/g, enc->time_base.den/g);
730
            }
731
        }
732
        if (encode) {
733
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
734
                     ", q=%d-%d", enc->qmin, enc->qmax);
735
        }
736
        bitrate = enc->bit_rate;
737
        break;
738
    case CODEC_TYPE_AUDIO:
739
        snprintf(buf, buf_size,
740
                 "Audio: %s",
741
                 codec_name);
742
        if (enc->sample_rate) {
743
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
744
                     ", %d Hz", enc->sample_rate);
745
        }
746
        av_strlcat(buf, ", ", buf_size);
747
        avcodec_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
748
        if (enc->sample_fmt != SAMPLE_FMT_NONE) {
749
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
750
                     ", %s", avcodec_get_sample_fmt_name(enc->sample_fmt));
751
        }
752

    
753
        /* for PCM codecs, compute bitrate directly */
754
        switch(enc->codec_id) {
755
        case CODEC_ID_PCM_F64BE:
756
        case CODEC_ID_PCM_F64LE:
757
            bitrate = enc->sample_rate * enc->channels * 64;
758
            break;
759
        case CODEC_ID_PCM_S32LE:
760
        case CODEC_ID_PCM_S32BE:
761
        case CODEC_ID_PCM_U32LE:
762
        case CODEC_ID_PCM_U32BE:
763
        case CODEC_ID_PCM_F32BE:
764
        case CODEC_ID_PCM_F32LE:
765
            bitrate = enc->sample_rate * enc->channels * 32;
766
            break;
767
        case CODEC_ID_PCM_S24LE:
768
        case CODEC_ID_PCM_S24BE:
769
        case CODEC_ID_PCM_U24LE:
770
        case CODEC_ID_PCM_U24BE:
771
        case CODEC_ID_PCM_S24DAUD:
772
            bitrate = enc->sample_rate * enc->channels * 24;
773
            break;
774
        case CODEC_ID_PCM_S16LE:
775
        case CODEC_ID_PCM_S16BE:
776
        case CODEC_ID_PCM_S16LE_PLANAR:
777
        case CODEC_ID_PCM_U16LE:
778
        case CODEC_ID_PCM_U16BE:
779
            bitrate = enc->sample_rate * enc->channels * 16;
780
            break;
781
        case CODEC_ID_PCM_S8:
782
        case CODEC_ID_PCM_U8:
783
        case CODEC_ID_PCM_ALAW:
784
        case CODEC_ID_PCM_MULAW:
785
        case CODEC_ID_PCM_ZORK:
786
            bitrate = enc->sample_rate * enc->channels * 8;
787
            break;
788
        default:
789
            bitrate = enc->bit_rate;
790
            break;
791
        }
792
        break;
793
    case CODEC_TYPE_DATA:
794
        snprintf(buf, buf_size, "Data: %s", codec_name);
795
        bitrate = enc->bit_rate;
796
        break;
797
    case CODEC_TYPE_SUBTITLE:
798
        snprintf(buf, buf_size, "Subtitle: %s", codec_name);
799
        bitrate = enc->bit_rate;
800
        break;
801
    case CODEC_TYPE_ATTACHMENT:
802
        snprintf(buf, buf_size, "Attachment: %s", codec_name);
803
        bitrate = enc->bit_rate;
804
        break;
805
    default:
806
        snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
807
        return;
808
    }
809
    if (encode) {
810
        if (enc->flags & CODEC_FLAG_PASS1)
811
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
812
                     ", pass 1");
813
        if (enc->flags & CODEC_FLAG_PASS2)
814
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
815
                     ", pass 2");
816
    }
817
    if (bitrate != 0) {
818
        snprintf(buf + strlen(buf), buf_size - strlen(buf),
819
                 ", %d kb/s", bitrate / 1000);
820
    }
821
}
822

    
823
unsigned avcodec_version( void )
824
{
825
  return LIBAVCODEC_VERSION_INT;
826
}
827

    
828
void avcodec_init(void)
829
{
830
    static int initialized = 0;
831

    
832
    if (initialized != 0)
833
        return;
834
    initialized = 1;
835

    
836
    dsputil_static_init();
837
}
838

    
839
void avcodec_flush_buffers(AVCodecContext *avctx)
840
{
841
    if(avctx->codec->flush)
842
        avctx->codec->flush(avctx);
843
}
844

    
845
void avcodec_default_free_buffers(AVCodecContext *s){
846
    int i, j;
847

    
848
    if(s->internal_buffer==NULL) return;
849

    
850
    for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
851
        InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
852
        for(j=0; j<4; j++){
853
            av_freep(&buf->base[j]);
854
            buf->data[j]= NULL;
855
        }
856
    }
857
    av_freep(&s->internal_buffer);
858

    
859
    s->internal_buffer_count=0;
860
}
861

    
862
char av_get_pict_type_char(int pict_type){
863
    switch(pict_type){
864
    case FF_I_TYPE: return 'I';
865
    case FF_P_TYPE: return 'P';
866
    case FF_B_TYPE: return 'B';
867
    case FF_S_TYPE: return 'S';
868
    case FF_SI_TYPE:return 'i';
869
    case FF_SP_TYPE:return 'p';
870
    case FF_BI_TYPE:return 'b';
871
    default:        return '?';
872
    }
873
}
874

    
875
int av_get_bits_per_sample(enum CodecID codec_id){
876
    switch(codec_id){
877
    case CODEC_ID_ADPCM_SBPRO_2:
878
        return 2;
879
    case CODEC_ID_ADPCM_SBPRO_3:
880
        return 3;
881
    case CODEC_ID_ADPCM_SBPRO_4:
882
    case CODEC_ID_ADPCM_CT:
883
        return 4;
884
    case CODEC_ID_PCM_ALAW:
885
    case CODEC_ID_PCM_MULAW:
886
    case CODEC_ID_PCM_S8:
887
    case CODEC_ID_PCM_U8:
888
    case CODEC_ID_PCM_ZORK:
889
        return 8;
890
    case CODEC_ID_PCM_S16BE:
891
    case CODEC_ID_PCM_S16LE:
892
    case CODEC_ID_PCM_S16LE_PLANAR:
893
    case CODEC_ID_PCM_U16BE:
894
    case CODEC_ID_PCM_U16LE:
895
        return 16;
896
    case CODEC_ID_PCM_S24DAUD:
897
    case CODEC_ID_PCM_S24BE:
898
    case CODEC_ID_PCM_S24LE:
899
    case CODEC_ID_PCM_U24BE:
900
    case CODEC_ID_PCM_U24LE:
901
        return 24;
902
    case CODEC_ID_PCM_S32BE:
903
    case CODEC_ID_PCM_S32LE:
904
    case CODEC_ID_PCM_U32BE:
905
    case CODEC_ID_PCM_U32LE:
906
    case CODEC_ID_PCM_F32BE:
907
    case CODEC_ID_PCM_F32LE:
908
        return 32;
909
    case CODEC_ID_PCM_F64BE:
910
    case CODEC_ID_PCM_F64LE:
911
        return 64;
912
    default:
913
        return 0;
914
    }
915
}
916

    
917
int av_get_bits_per_sample_format(enum SampleFormat sample_fmt) {
918
    switch (sample_fmt) {
919
    case SAMPLE_FMT_U8:
920
        return 8;
921
    case SAMPLE_FMT_S16:
922
        return 16;
923
    case SAMPLE_FMT_S32:
924
    case SAMPLE_FMT_FLT:
925
        return 32;
926
    case SAMPLE_FMT_DBL:
927
        return 64;
928
    default:
929
        return 0;
930
    }
931
}
932

    
933
#if !HAVE_THREADS
934
int avcodec_thread_init(AVCodecContext *s, int thread_count){
935
    return -1;
936
}
937
#endif
938

    
939
unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
940
{
941
    unsigned int n = 0;
942

    
943
    while(v >= 0xff) {
944
        *s++ = 0xff;
945
        v -= 0xff;
946
        n++;
947
    }
948
    *s = v;
949
    n++;
950
    return n;
951
}
952

    
953
/* Wrapper to work around the lack of mkstemp() on mingw/cygin.
954
 * Also, tries to create file in /tmp first, if possible.
955
 * *prefix can be a character constant; *filename will be allocated internally.
956
 * Returns file descriptor of opened file (or -1 on error)
957
 * and opened file name in **filename. */
958
int av_tempfile(char *prefix, char **filename) {
959
    int fd=-1;
960
#if !HAVE_MKSTEMP
961
    *filename = tempnam(".", prefix);
962
#else
963
    size_t len = strlen(prefix) + 12; /* room for "/tmp/" and "XXXXXX\0" */
964
    *filename = av_malloc(len);
965
#endif
966
    /* -----common section-----*/
967
    if (*filename == NULL) {
968
        av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot allocate file name\n");
969
        return -1;
970
    }
971
#if !HAVE_MKSTEMP
972
    fd = open(*filename, O_RDWR | O_BINARY | O_CREAT, 0444);
973
#else
974
    snprintf(*filename, len, "/tmp/%sXXXXXX", prefix);
975
    fd = mkstemp(*filename);
976
    if (fd < 0) {
977
        snprintf(*filename, len, "./%sXXXXXX", prefix);
978
        fd = mkstemp(*filename);
979
    }
980
#endif
981
    /* -----common section-----*/
982
    if (fd < 0) {
983
        av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot open temporary file %s\n", *filename);
984
        return -1;
985
    }
986
    return fd; /* success */
987
}
988

    
989
typedef struct {
990
    const char *abbr;
991
    int width, height;
992
} VideoFrameSizeAbbr;
993

    
994
typedef struct {
995
    const char *abbr;
996
    int rate_num, rate_den;
997
} VideoFrameRateAbbr;
998

    
999
static const VideoFrameSizeAbbr video_frame_size_abbrs[] = {
1000
    { "ntsc",      720, 480 },
1001
    { "pal",       720, 576 },
1002
    { "qntsc",     352, 240 }, /* VCD compliant NTSC */
1003
    { "qpal",      352, 288 }, /* VCD compliant PAL */
1004
    { "sntsc",     640, 480 }, /* square pixel NTSC */
1005
    { "spal",      768, 576 }, /* square pixel PAL */
1006
    { "film",      352, 240 },
1007
    { "ntsc-film", 352, 240 },
1008
    { "sqcif",     128,  96 },
1009
    { "qcif",      176, 144 },
1010
    { "cif",       352, 288 },
1011
    { "4cif",      704, 576 },
1012
    { "qqvga",     160, 120 },
1013
    { "qvga",      320, 240 },
1014
    { "vga",       640, 480 },
1015
    { "svga",      800, 600 },
1016
    { "xga",      1024, 768 },
1017
    { "uxga",     1600,1200 },
1018
    { "qxga",     2048,1536 },
1019
    { "sxga",     1280,1024 },
1020
    { "qsxga",    2560,2048 },
1021
    { "hsxga",    5120,4096 },
1022
    { "wvga",      852, 480 },
1023
    { "wxga",     1366, 768 },
1024
    { "wsxga",    1600,1024 },
1025
    { "wuxga",    1920,1200 },
1026
    { "woxga",    2560,1600 },
1027
    { "wqsxga",   3200,2048 },
1028
    { "wquxga",   3840,2400 },
1029
    { "whsxga",   6400,4096 },
1030
    { "whuxga",   7680,4800 },
1031
    { "cga",       320, 200 },
1032
    { "ega",       640, 350 },
1033
    { "hd480",     852, 480 },
1034
    { "hd720",    1280, 720 },
1035
    { "hd1080",   1920,1080 },
1036
};
1037

    
1038
static const VideoFrameRateAbbr video_frame_rate_abbrs[]= {
1039
    { "ntsc",      30000, 1001 },
1040
    { "pal",          25,    1 },
1041
    { "qntsc",     30000, 1001 }, /* VCD compliant NTSC */
1042
    { "qpal",         25,    1 }, /* VCD compliant PAL */
1043
    { "sntsc",     30000, 1001 }, /* square pixel NTSC */
1044
    { "spal",         25,    1 }, /* square pixel PAL */
1045
    { "film",         24,    1 },
1046
    { "ntsc-film", 24000, 1001 },
1047
};
1048

    
1049
int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str)
1050
{
1051
    int i;
1052
    int n = FF_ARRAY_ELEMS(video_frame_size_abbrs);
1053
    char *p;
1054
    int frame_width = 0, frame_height = 0;
1055

    
1056
    for(i=0;i<n;i++) {
1057
        if (!strcmp(video_frame_size_abbrs[i].abbr, str)) {
1058
            frame_width = video_frame_size_abbrs[i].width;
1059
            frame_height = video_frame_size_abbrs[i].height;
1060
            break;
1061
        }
1062
    }
1063
    if (i == n) {
1064
        p = str;
1065
        frame_width = strtol(p, &p, 10);
1066
        if (*p)
1067
            p++;
1068
        frame_height = strtol(p, &p, 10);
1069
    }
1070
    if (frame_width <= 0 || frame_height <= 0)
1071
        return -1;
1072
    *width_ptr = frame_width;
1073
    *height_ptr = frame_height;
1074
    return 0;
1075
}
1076

    
1077
int av_parse_video_frame_rate(AVRational *frame_rate, const char *arg)
1078
{
1079
    int i;
1080
    int n = FF_ARRAY_ELEMS(video_frame_rate_abbrs);
1081
    char* cp;
1082

    
1083
    /* First, we check our abbreviation table */
1084
    for (i = 0; i < n; ++i)
1085
         if (!strcmp(video_frame_rate_abbrs[i].abbr, arg)) {
1086
             frame_rate->num = video_frame_rate_abbrs[i].rate_num;
1087
             frame_rate->den = video_frame_rate_abbrs[i].rate_den;
1088
             return 0;
1089
         }
1090

    
1091
    /* Then, we try to parse it as fraction */
1092
    cp = strchr(arg, '/');
1093
    if (!cp)
1094
        cp = strchr(arg, ':');
1095
    if (cp) {
1096
        char* cpp;
1097
        frame_rate->num = strtol(arg, &cpp, 10);
1098
        if (cpp != arg || cpp == cp)
1099
            frame_rate->den = strtol(cp+1, &cpp, 10);
1100
        else
1101
           frame_rate->num = 0;
1102
    }
1103
    else {
1104
        /* Finally we give up and parse it as double */
1105
        AVRational time_base = av_d2q(strtod(arg, 0), 1001000);
1106
        frame_rate->den = time_base.den;
1107
        frame_rate->num = time_base.num;
1108
    }
1109
    if (!frame_rate->num || !frame_rate->den)
1110
        return -1;
1111
    else
1112
        return 0;
1113
}
1114

    
1115
void ff_log_missing_feature(void *avc, const char *feature, int want_sample)
1116
{
1117
    av_log(avc, AV_LOG_WARNING, "%s not implemented. Update your FFmpeg "
1118
            "version to the newest one from SVN. If the problem still "
1119
            "occurs, it means that your file has a feature which has not "
1120
            "been implemented.", feature);
1121
    if(want_sample)
1122
        ff_log_ask_for_sample(avc, NULL);
1123
    else
1124
        av_log(avc, AV_LOG_WARNING, "\n");
1125
}
1126

    
1127
void ff_log_ask_for_sample(void *avc, const char *msg)
1128
{
1129
    if (msg)
1130
        av_log(avc, AV_LOG_WARNING, "%s ", msg);
1131
    av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
1132
            "of this file to ftp://upload.ffmpeg.org/MPlayer/incoming/ "
1133
            "and contact the ffmpeg-devel mailing list.\n");
1134
}
1135

    
1136
static AVHWAccel *first_hwaccel = NULL;
1137

    
1138
void av_register_hwaccel(AVHWAccel *hwaccel)
1139
{
1140
    AVHWAccel **p = &first_hwaccel;
1141
    while (*p)
1142
        p = &(*p)->next;
1143
    *p = hwaccel;
1144
    hwaccel->next = NULL;
1145
}
1146

    
1147
AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel)
1148
{
1149
    return hwaccel ? hwaccel->next : first_hwaccel;
1150
}
1151

    
1152
AVHWAccel *ff_find_hwaccel(enum CodecID codec_id, enum PixelFormat pix_fmt)
1153
{
1154
    AVHWAccel *hwaccel=NULL;
1155

    
1156
    while((hwaccel= av_hwaccel_next(hwaccel))){
1157
        if (   hwaccel->id      == codec_id
1158
            && hwaccel->pix_fmt == pix_fmt)
1159
            return hwaccel;
1160
    }
1161
    return NULL;
1162
}