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ffmpeg / libavcodec / utils.c @ 6ed04040

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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
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 * Lesser General Public License for more details.
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 *
18
 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21
 */
22

    
23
/**
24
 * @file
25
 * utils.
26
 */
27

    
28
#include "libavutil/avstring.h"
29
#include "libavutil/integer.h"
30
#include "libavutil/crc.h"
31
#include "libavutil/pixdesc.h"
32
#include "libavcore/imgutils.h"
33
#include "avcodec.h"
34
#include "dsputil.h"
35
#include "libavutil/opt.h"
36
#include "imgconvert.h"
37
#include "audioconvert.h"
38
#include "internal.h"
39
#include <stdlib.h>
40
#include <stdarg.h>
41
#include <limits.h>
42
#include <float.h>
43

    
44
static int volatile entangled_thread_counter=0;
45
int (*ff_lockmgr_cb)(void **mutex, enum AVLockOp op);
46
static void *codec_mutex;
47

    
48
void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size)
49
{
50
    if(min_size < *size)
51
        return ptr;
52

    
53
    *size= FFMAX(17*min_size/16 + 32, min_size);
54

    
55
    ptr= av_realloc(ptr, *size);
56
    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
57
        *size= 0;
58

    
59
    return ptr;
60
}
61

    
62
void av_fast_malloc(void *ptr, unsigned int *size, unsigned int min_size)
63
{
64
    void **p = ptr;
65
    if (min_size < *size)
66
        return;
67
    *size= FFMAX(17*min_size/16 + 32, min_size);
68
    av_free(*p);
69
    *p = av_malloc(*size);
70
    if (!*p) *size = 0;
71
}
72

    
73
/* encoder management */
74
static AVCodec *first_avcodec = NULL;
75

    
76
AVCodec *av_codec_next(AVCodec *c){
77
    if(c) return c->next;
78
    else  return first_avcodec;
79
}
80

    
81
void avcodec_register(AVCodec *codec)
82
{
83
    AVCodec **p;
84
    avcodec_init();
85
    p = &first_avcodec;
86
    while (*p != NULL) p = &(*p)->next;
87
    *p = codec;
88
    codec->next = NULL;
89
}
90

    
91
#if LIBAVCODEC_VERSION_MAJOR < 53
92
void register_avcodec(AVCodec *codec)
93
{
94
    avcodec_register(codec);
95
}
96
#endif
97

    
98
unsigned avcodec_get_edge_width(void)
99
{
100
    return EDGE_WIDTH;
101
}
102

    
103
void avcodec_set_dimensions(AVCodecContext *s, int width, int height){
104
    s->coded_width = width;
105
    s->coded_height= height;
106
    s->width = -((-width )>>s->lowres);
107
    s->height= -((-height)>>s->lowres);
108
}
109

    
110
typedef struct InternalBuffer{
111
    int last_pic_num;
112
    uint8_t *base[4];
113
    uint8_t *data[4];
114
    int linesize[4];
115
    int width, height;
116
    enum PixelFormat pix_fmt;
117
}InternalBuffer;
118

    
119
#define INTERNAL_BUFFER_SIZE 32
120

    
121
void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height, int linesize_align[4]){
122
    int w_align= 1;
123
    int h_align= 1;
124

    
125
    switch(s->pix_fmt){
126
    case PIX_FMT_YUV420P:
127
    case PIX_FMT_YUYV422:
128
    case PIX_FMT_UYVY422:
129
    case PIX_FMT_YUV422P:
130
    case PIX_FMT_YUV440P:
131
    case PIX_FMT_YUV444P:
132
    case PIX_FMT_GRAY8:
133
    case PIX_FMT_GRAY16BE:
134
    case PIX_FMT_GRAY16LE:
135
    case PIX_FMT_YUVJ420P:
136
    case PIX_FMT_YUVJ422P:
137
    case PIX_FMT_YUVJ440P:
138
    case PIX_FMT_YUVJ444P:
139
    case PIX_FMT_YUVA420P:
140
        w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
141
        h_align= 16;
142
        if(s->codec_id == CODEC_ID_MPEG2VIDEO || s->codec_id == CODEC_ID_MJPEG || s->codec_id == CODEC_ID_AMV || s->codec_id == CODEC_ID_THP)
143
            h_align= 32; // interlaced is rounded up to 2 MBs
144
        break;
145
    case PIX_FMT_YUV411P:
146
    case PIX_FMT_UYYVYY411:
147
        w_align=32;
148
        h_align=8;
149
        break;
150
    case PIX_FMT_YUV410P:
151
        if(s->codec_id == CODEC_ID_SVQ1){
152
            w_align=64;
153
            h_align=64;
154
        }
155
    case PIX_FMT_RGB555:
156
        if(s->codec_id == CODEC_ID_RPZA){
157
            w_align=4;
158
            h_align=4;
159
        }
160
    case PIX_FMT_PAL8:
161
    case PIX_FMT_BGR8:
162
    case PIX_FMT_RGB8:
163
        if(s->codec_id == CODEC_ID_SMC){
164
            w_align=4;
165
            h_align=4;
166
        }
167
        break;
168
    case PIX_FMT_BGR24:
169
        if((s->codec_id == CODEC_ID_MSZH) || (s->codec_id == CODEC_ID_ZLIB)){
170
            w_align=4;
171
            h_align=4;
172
        }
173
        break;
174
    default:
175
        w_align= 1;
176
        h_align= 1;
177
        break;
178
    }
179

    
180
    *width = FFALIGN(*width , w_align);
181
    *height= FFALIGN(*height, h_align);
182
    if(s->codec_id == CODEC_ID_H264)
183
        *height+=2; // some of the optimized chroma MC reads one line too much
184

    
185
    linesize_align[0] =
186
    linesize_align[1] =
187
    linesize_align[2] =
188
    linesize_align[3] = STRIDE_ALIGN;
189
//STRIDE_ALIGN is 8 for SSE* but this does not work for SVQ1 chroma planes
190
//we could change STRIDE_ALIGN to 16 for x86/sse but it would increase the
191
//picture size unneccessarily in some cases. The solution here is not
192
//pretty and better ideas are welcome!
193
#if HAVE_MMX
194
    if(s->codec_id == CODEC_ID_SVQ1 || s->codec_id == CODEC_ID_VP5 ||
195
       s->codec_id == CODEC_ID_VP6 || s->codec_id == CODEC_ID_VP6F ||
196
       s->codec_id == CODEC_ID_VP6A) {
197
        linesize_align[0] =
198
        linesize_align[1] =
199
        linesize_align[2] = 16;
200
    }
201
#endif
202
}
203

    
204
void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
205
    int chroma_shift = av_pix_fmt_descriptors[s->pix_fmt].log2_chroma_w;
206
    int linesize_align[4];
207
    int align;
208
    avcodec_align_dimensions2(s, width, height, linesize_align);
209
    align = FFMAX(linesize_align[0], linesize_align[3]);
210
    linesize_align[1] <<= chroma_shift;
211
    linesize_align[2] <<= chroma_shift;
212
    align = FFMAX3(align, linesize_align[1], linesize_align[2]);
213
    *width=FFALIGN(*width, align);
214
}
215

    
216
#if LIBAVCODEC_VERSION_MAJOR < 53
217
int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h){
218
    return av_image_check_size(w, h, 0, av_log_ctx);
219
}
220
#endif
221

    
222
int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
223
    int i;
224
    int w= s->width;
225
    int h= s->height;
226
    InternalBuffer *buf;
227
    int *picture_number;
228

    
229
    if(pic->data[0]!=NULL) {
230
        av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n");
231
        return -1;
232
    }
233
    if(s->internal_buffer_count >= INTERNAL_BUFFER_SIZE) {
234
        av_log(s, AV_LOG_ERROR, "internal_buffer_count overflow (missing release_buffer?)\n");
235
        return -1;
236
    }
237

    
238
    if(av_image_check_size(w, h, 0, s))
239
        return -1;
240

    
241
    if(s->internal_buffer==NULL){
242
        s->internal_buffer= av_mallocz((INTERNAL_BUFFER_SIZE+1)*sizeof(InternalBuffer));
243
    }
244
#if 0
245
    s->internal_buffer= av_fast_realloc(
246
        s->internal_buffer,
247
        &s->internal_buffer_size,
248
        sizeof(InternalBuffer)*FFMAX(99,  s->internal_buffer_count+1)/*FIXME*/
249
        );
250
#endif
251

    
252
    buf= &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
253
    picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE]).last_pic_num; //FIXME ugly hack
254
    (*picture_number)++;
255

    
256
    if(buf->base[0] && (buf->width != w || buf->height != h || buf->pix_fmt != s->pix_fmt)){
257
        for(i=0; i<4; i++){
258
            av_freep(&buf->base[i]);
259
            buf->data[i]= NULL;
260
        }
261
    }
262

    
263
    if(buf->base[0]){
264
        pic->age= *picture_number - buf->last_pic_num;
265
        buf->last_pic_num= *picture_number;
266
    }else{
267
        int h_chroma_shift, v_chroma_shift;
268
        int size[4] = {0};
269
        int tmpsize;
270
        int unaligned;
271
        AVPicture picture;
272
        int stride_align[4];
273

    
274
        avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
275

    
276
        avcodec_align_dimensions2(s, &w, &h, stride_align);
277

    
278
        if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
279
            w+= EDGE_WIDTH*2;
280
            h+= EDGE_WIDTH*2;
281
        }
282

    
283
        do {
284
            // NOTE: do not align linesizes individually, this breaks e.g. assumptions
285
            // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
286
            av_image_fill_linesizes(picture.linesize, s->pix_fmt, w);
287
            // increase alignment of w for next try (rhs gives the lowest bit set in w)
288
            w += w & ~(w-1);
289

    
290
            unaligned = 0;
291
            for (i=0; i<4; i++){
292
                unaligned |= picture.linesize[i] % stride_align[i];
293
            }
294
        } while (unaligned);
295

    
296
        tmpsize = av_image_fill_pointers(picture.data, s->pix_fmt, h, NULL, picture.linesize);
297
        if (tmpsize < 0)
298
            return -1;
299

    
300
        for (i=0; i<3 && picture.data[i+1]; i++)
301
            size[i] = picture.data[i+1] - picture.data[i];
302
        size[i] = tmpsize - (picture.data[i] - picture.data[0]);
303

    
304
        buf->last_pic_num= -256*256*256*64;
305
        memset(buf->base, 0, sizeof(buf->base));
306
        memset(buf->data, 0, sizeof(buf->data));
307

    
308
        for(i=0; i<4 && size[i]; i++){
309
            const int h_shift= i==0 ? 0 : h_chroma_shift;
310
            const int v_shift= i==0 ? 0 : v_chroma_shift;
311

    
312
            buf->linesize[i]= picture.linesize[i];
313

    
314
            buf->base[i]= av_malloc(size[i]+16); //FIXME 16
315
            if(buf->base[i]==NULL) return -1;
316
            memset(buf->base[i], 128, size[i]);
317

    
318
            // no edge if EDGE EMU or not planar YUV
319
            if((s->flags&CODEC_FLAG_EMU_EDGE) || !size[2])
320
                buf->data[i] = buf->base[i];
321
            else
322
                buf->data[i] = buf->base[i] + FFALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), stride_align[i]);
323
        }
324
        if(size[1] && !size[2])
325
            ff_set_systematic_pal((uint32_t*)buf->data[1], s->pix_fmt);
326
        buf->width  = s->width;
327
        buf->height = s->height;
328
        buf->pix_fmt= s->pix_fmt;
329
        pic->age= 256*256*256*64;
330
    }
331
    pic->type= FF_BUFFER_TYPE_INTERNAL;
332

    
333
    for(i=0; i<4; i++){
334
        pic->base[i]= buf->base[i];
335
        pic->data[i]= buf->data[i];
336
        pic->linesize[i]= buf->linesize[i];
337
    }
338
    s->internal_buffer_count++;
339

    
340
    pic->reordered_opaque= s->reordered_opaque;
341

    
342
    if(s->debug&FF_DEBUG_BUFFERS)
343
        av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
344

    
345
    return 0;
346
}
347

    
348
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
349
    int i;
350
    InternalBuffer *buf, *last;
351

    
352
    assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
353
    assert(s->internal_buffer_count);
354

    
355
    buf = NULL; /* avoids warning */
356
    for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
357
        buf= &((InternalBuffer*)s->internal_buffer)[i];
358
        if(buf->data[0] == pic->data[0])
359
            break;
360
    }
361
    assert(i < s->internal_buffer_count);
362
    s->internal_buffer_count--;
363
    last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
364

    
365
    FFSWAP(InternalBuffer, *buf, *last);
366

    
367
    for(i=0; i<4; i++){
368
        pic->data[i]=NULL;
369
//        pic->base[i]=NULL;
370
    }
371
//printf("R%X\n", pic->opaque);
372

    
373
    if(s->debug&FF_DEBUG_BUFFERS)
374
        av_log(s, AV_LOG_DEBUG, "default_release_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
375
}
376

    
377
int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
378
    AVFrame temp_pic;
379
    int i;
380

    
381
    /* If no picture return a new buffer */
382
    if(pic->data[0] == NULL) {
383
        /* We will copy from buffer, so must be readable */
384
        pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
385
        return s->get_buffer(s, pic);
386
    }
387

    
388
    /* If internal buffer type return the same buffer */
389
    if(pic->type == FF_BUFFER_TYPE_INTERNAL) {
390
        pic->reordered_opaque= s->reordered_opaque;
391
        return 0;
392
    }
393

    
394
    /*
395
     * Not internal type and reget_buffer not overridden, emulate cr buffer
396
     */
397
    temp_pic = *pic;
398
    for(i = 0; i < 4; i++)
399
        pic->data[i] = pic->base[i] = NULL;
400
    pic->opaque = NULL;
401
    /* Allocate new frame */
402
    if (s->get_buffer(s, pic))
403
        return -1;
404
    /* Copy image data from old buffer to new buffer */
405
    av_picture_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
406
             s->height);
407
    s->release_buffer(s, &temp_pic); // Release old frame
408
    return 0;
409
}
410

    
411
int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size){
412
    int i;
413

    
414
    for(i=0; i<count; i++){
415
        int r= func(c, (char*)arg + i*size);
416
        if(ret) ret[i]= r;
417
    }
418
    return 0;
419
}
420

    
421
int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr),void *arg, int *ret, int count){
422
    int i;
423

    
424
    for(i=0; i<count; i++){
425
        int r= func(c, arg, i, 0);
426
        if(ret) ret[i]= r;
427
    }
428
    return 0;
429
}
430

    
431
enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat *fmt){
432
    while (*fmt != PIX_FMT_NONE && ff_is_hwaccel_pix_fmt(*fmt))
433
        ++fmt;
434
    return fmt[0];
435
}
436

    
437
void avcodec_get_frame_defaults(AVFrame *pic){
438
    memset(pic, 0, sizeof(AVFrame));
439

    
440
    pic->pts= AV_NOPTS_VALUE;
441
    pic->key_frame= 1;
442
}
443

    
444
AVFrame *avcodec_alloc_frame(void){
445
    AVFrame *pic= av_malloc(sizeof(AVFrame));
446

    
447
    if(pic==NULL) return NULL;
448

    
449
    avcodec_get_frame_defaults(pic);
450

    
451
    return pic;
452
}
453

    
454
int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
455
{
456
    int ret= -1;
457

    
458
    /* If there is a user-supplied mutex locking routine, call it. */
459
    if (ff_lockmgr_cb) {
460
        if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
461
            return -1;
462
    }
463

    
464
    entangled_thread_counter++;
465
    if(entangled_thread_counter != 1){
466
        av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
467
        goto end;
468
    }
469

    
470
    if(avctx->codec || !codec)
471
        goto end;
472

    
473
    if (codec->priv_data_size > 0) {
474
        avctx->priv_data = av_mallocz(codec->priv_data_size);
475
        if (!avctx->priv_data) {
476
            ret = AVERROR(ENOMEM);
477
            goto end;
478
        }
479
    } else {
480
        avctx->priv_data = NULL;
481
    }
482

    
483
    if(avctx->coded_width && avctx->coded_height)
484
        avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
485
    else if(avctx->width && avctx->height)
486
        avcodec_set_dimensions(avctx, avctx->width, avctx->height);
487

    
488
    if ((avctx->coded_width || avctx->coded_height || avctx->width || avctx->height)
489
        && (  av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx) < 0
490
           || av_image_check_size(avctx->width,       avctx->height,       0, avctx) < 0)) {
491
        av_log(avctx, AV_LOG_WARNING, "ignoring invalid width/height values\n");
492
        avcodec_set_dimensions(avctx, 0, 0);
493
    }
494

    
495
#define SANE_NB_CHANNELS 128U
496
    if (avctx->channels > SANE_NB_CHANNELS) {
497
        ret = AVERROR(EINVAL);
498
        goto free_and_end;
499
    }
500

    
501
    avctx->codec = codec;
502
    if ((avctx->codec_type == AVMEDIA_TYPE_UNKNOWN || avctx->codec_type == codec->type) &&
503
        avctx->codec_id == CODEC_ID_NONE) {
504
        avctx->codec_type = codec->type;
505
        avctx->codec_id   = codec->id;
506
    }
507
    if(avctx->codec_id != codec->id || avctx->codec_type != codec->type){
508
        av_log(avctx, AV_LOG_ERROR, "codec type or id mismatches\n");
509
        goto free_and_end;
510
    }
511
    avctx->frame_number = 0;
512
    if (avctx->codec->max_lowres < avctx->lowres) {
513
        av_log(avctx, AV_LOG_ERROR, "The maximum value for lowres supported by the decoder is %d\n",
514
               avctx->codec->max_lowres);
515
        goto free_and_end;
516
    }
517

    
518
    if(avctx->codec->init){
519
        ret = avctx->codec->init(avctx);
520
        if (ret < 0) {
521
            goto free_and_end;
522
        }
523
    }
524
    ret=0;
525
end:
526
    entangled_thread_counter--;
527

    
528
    /* Release any user-supplied mutex. */
529
    if (ff_lockmgr_cb) {
530
        (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
531
    }
532
    return ret;
533
free_and_end:
534
    av_freep(&avctx->priv_data);
535
    avctx->codec= NULL;
536
    goto end;
537
}
538

    
539
int attribute_align_arg avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
540
                         const short *samples)
541
{
542
    if(buf_size < FF_MIN_BUFFER_SIZE && 0){
543
        av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
544
        return -1;
545
    }
546
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || samples){
547
        int ret = avctx->codec->encode(avctx, buf, buf_size, samples);
548
        avctx->frame_number++;
549
        return ret;
550
    }else
551
        return 0;
552
}
553

    
554
int attribute_align_arg avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
555
                         const AVFrame *pict)
556
{
557
    if(buf_size < FF_MIN_BUFFER_SIZE){
558
        av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
559
        return -1;
560
    }
561
    if(av_image_check_size(avctx->width, avctx->height, 0, avctx))
562
        return -1;
563
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){
564
        int ret = avctx->codec->encode(avctx, buf, buf_size, pict);
565
        avctx->frame_number++;
566
        emms_c(); //needed to avoid an emms_c() call before every return;
567

    
568
        return ret;
569
    }else
570
        return 0;
571
}
572

    
573
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
574
                            const AVSubtitle *sub)
575
{
576
    int ret;
577
    if(sub->start_display_time) {
578
        av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
579
        return -1;
580
    }
581
    if(sub->num_rects == 0 || !sub->rects)
582
        return -1;
583
    ret = avctx->codec->encode(avctx, buf, buf_size, sub);
584
    avctx->frame_number++;
585
    return ret;
586
}
587

    
588
#if LIBAVCODEC_VERSION_MAJOR < 53
589
int attribute_align_arg avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
590
                         int *got_picture_ptr,
591
                         const uint8_t *buf, int buf_size)
592
{
593
    AVPacket avpkt;
594
    av_init_packet(&avpkt);
595
    avpkt.data = buf;
596
    avpkt.size = buf_size;
597
    // HACK for CorePNG to decode as normal PNG by default
598
    avpkt.flags = AV_PKT_FLAG_KEY;
599

    
600
    return avcodec_decode_video2(avctx, picture, got_picture_ptr, &avpkt);
601
}
602
#endif
603

    
604
int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
605
                         int *got_picture_ptr,
606
                         AVPacket *avpkt)
607
{
608
    int ret;
609

    
610
    *got_picture_ptr= 0;
611
    if((avctx->coded_width||avctx->coded_height) && av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx))
612
        return -1;
613
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size){
614
        ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
615
                                avpkt);
616

    
617
        emms_c(); //needed to avoid an emms_c() call before every return;
618

    
619
        if (*got_picture_ptr)
620
            avctx->frame_number++;
621
    }else
622
        ret= 0;
623

    
624
    return ret;
625
}
626

    
627
#if LIBAVCODEC_VERSION_MAJOR < 53
628
int attribute_align_arg avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
629
                         int *frame_size_ptr,
630
                         const uint8_t *buf, int buf_size)
631
{
632
    AVPacket avpkt;
633
    av_init_packet(&avpkt);
634
    avpkt.data = buf;
635
    avpkt.size = buf_size;
636

    
637
    return avcodec_decode_audio3(avctx, samples, frame_size_ptr, &avpkt);
638
}
639
#endif
640

    
641
int attribute_align_arg avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
642
                         int *frame_size_ptr,
643
                         AVPacket *avpkt)
644
{
645
    int ret;
646

    
647
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size){
648
        //FIXME remove the check below _after_ ensuring that all audio check that the available space is enough
649
        if(*frame_size_ptr < AVCODEC_MAX_AUDIO_FRAME_SIZE){
650
            av_log(avctx, AV_LOG_ERROR, "buffer smaller than AVCODEC_MAX_AUDIO_FRAME_SIZE\n");
651
            return -1;
652
        }
653
        if(*frame_size_ptr < FF_MIN_BUFFER_SIZE ||
654
        *frame_size_ptr < avctx->channels * avctx->frame_size * sizeof(int16_t)){
655
            av_log(avctx, AV_LOG_ERROR, "buffer %d too small\n", *frame_size_ptr);
656
            return -1;
657
        }
658

    
659
        ret = avctx->codec->decode(avctx, samples, frame_size_ptr, avpkt);
660
        avctx->frame_number++;
661
    }else{
662
        ret= 0;
663
        *frame_size_ptr=0;
664
    }
665
    return ret;
666
}
667

    
668
#if LIBAVCODEC_VERSION_MAJOR < 53
669
int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
670
                            int *got_sub_ptr,
671
                            const uint8_t *buf, int buf_size)
672
{
673
    AVPacket avpkt;
674
    av_init_packet(&avpkt);
675
    avpkt.data = buf;
676
    avpkt.size = buf_size;
677

    
678
    return avcodec_decode_subtitle2(avctx, sub, got_sub_ptr, &avpkt);
679
}
680
#endif
681

    
682
int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
683
                            int *got_sub_ptr,
684
                            AVPacket *avpkt)
685
{
686
    int ret;
687

    
688
    *got_sub_ptr = 0;
689
    ret = avctx->codec->decode(avctx, sub, got_sub_ptr, avpkt);
690
    if (*got_sub_ptr)
691
        avctx->frame_number++;
692
    return ret;
693
}
694

    
695
void avsubtitle_free(AVSubtitle *sub)
696
{
697
    int i;
698

    
699
    for (i = 0; i < sub->num_rects; i++)
700
    {
701
        av_freep(&sub->rects[i]->pict.data[0]);
702
        av_freep(&sub->rects[i]->pict.data[1]);
703
        av_freep(&sub->rects[i]->pict.data[2]);
704
        av_freep(&sub->rects[i]->pict.data[3]);
705
        av_freep(&sub->rects[i]->text);
706
        av_freep(&sub->rects[i]->ass);
707
        av_freep(&sub->rects[i]);
708
    }
709

    
710
    av_freep(&sub->rects);
711

    
712
    memset(sub, 0, sizeof(AVSubtitle));
713
}
714

    
715
av_cold int avcodec_close(AVCodecContext *avctx)
716
{
717
    /* If there is a user-supplied mutex locking routine, call it. */
718
    if (ff_lockmgr_cb) {
719
        if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
720
            return -1;
721
    }
722

    
723
    entangled_thread_counter++;
724
    if(entangled_thread_counter != 1){
725
        av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
726
        entangled_thread_counter--;
727
        return -1;
728
    }
729

    
730
    if (HAVE_THREADS && avctx->thread_opaque)
731
        avcodec_thread_free(avctx);
732
    if (avctx->codec && avctx->codec->close)
733
        avctx->codec->close(avctx);
734
    avcodec_default_free_buffers(avctx);
735
    avctx->coded_frame = NULL;
736
    av_freep(&avctx->priv_data);
737
    if(avctx->codec && avctx->codec->encode)
738
        av_freep(&avctx->extradata);
739
    avctx->codec = NULL;
740
    entangled_thread_counter--;
741

    
742
    /* Release any user-supplied mutex. */
743
    if (ff_lockmgr_cb) {
744
        (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
745
    }
746
    return 0;
747
}
748

    
749
AVCodec *avcodec_find_encoder(enum CodecID id)
750
{
751
    AVCodec *p, *experimental=NULL;
752
    p = first_avcodec;
753
    while (p) {
754
        if (p->encode != NULL && p->id == id) {
755
            if (p->capabilities & CODEC_CAP_EXPERIMENTAL && !experimental) {
756
                experimental = p;
757
            } else
758
                return p;
759
        }
760
        p = p->next;
761
    }
762
    return experimental;
763
}
764

    
765
AVCodec *avcodec_find_encoder_by_name(const char *name)
766
{
767
    AVCodec *p;
768
    if (!name)
769
        return NULL;
770
    p = first_avcodec;
771
    while (p) {
772
        if (p->encode != NULL && strcmp(name,p->name) == 0)
773
            return p;
774
        p = p->next;
775
    }
776
    return NULL;
777
}
778

    
779
AVCodec *avcodec_find_decoder(enum CodecID id)
780
{
781
    AVCodec *p;
782
    p = first_avcodec;
783
    while (p) {
784
        if (p->decode != NULL && p->id == id)
785
            return p;
786
        p = p->next;
787
    }
788
    return NULL;
789
}
790

    
791
AVCodec *avcodec_find_decoder_by_name(const char *name)
792
{
793
    AVCodec *p;
794
    if (!name)
795
        return NULL;
796
    p = first_avcodec;
797
    while (p) {
798
        if (p->decode != NULL && strcmp(name,p->name) == 0)
799
            return p;
800
        p = p->next;
801
    }
802
    return NULL;
803
}
804

    
805
static int get_bit_rate(AVCodecContext *ctx)
806
{
807
    int bit_rate;
808
    int bits_per_sample;
809

    
810
    switch(ctx->codec_type) {
811
    case AVMEDIA_TYPE_VIDEO:
812
    case AVMEDIA_TYPE_DATA:
813
    case AVMEDIA_TYPE_SUBTITLE:
814
    case AVMEDIA_TYPE_ATTACHMENT:
815
        bit_rate = ctx->bit_rate;
816
        break;
817
    case AVMEDIA_TYPE_AUDIO:
818
        bits_per_sample = av_get_bits_per_sample(ctx->codec_id);
819
        bit_rate = bits_per_sample ? ctx->sample_rate * ctx->channels * bits_per_sample : ctx->bit_rate;
820
        break;
821
    default:
822
        bit_rate = 0;
823
        break;
824
    }
825
    return bit_rate;
826
}
827

    
828
size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)
829
{
830
    int i, len, ret = 0;
831

    
832
    for (i = 0; i < 4; i++) {
833
        len = snprintf(buf, buf_size,
834
                       isprint(codec_tag&0xFF) ? "%c" : "[%d]", codec_tag&0xFF);
835
        buf      += len;
836
        buf_size  = buf_size > len ? buf_size - len : 0;
837
        ret      += len;
838
        codec_tag>>=8;
839
    }
840
    return ret;
841
}
842

    
843
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
844
{
845
    const char *codec_name;
846
    AVCodec *p;
847
    char buf1[32];
848
    int bitrate;
849
    AVRational display_aspect_ratio;
850

    
851
    if (encode)
852
        p = avcodec_find_encoder(enc->codec_id);
853
    else
854
        p = avcodec_find_decoder(enc->codec_id);
855

    
856
    if (p) {
857
        codec_name = p->name;
858
    } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
859
        /* fake mpeg2 transport stream codec (currently not
860
           registered) */
861
        codec_name = "mpeg2ts";
862
    } else if (enc->codec_name[0] != '\0') {
863
        codec_name = enc->codec_name;
864
    } else {
865
        /* output avi tags */
866
        char tag_buf[32];
867
        av_get_codec_tag_string(tag_buf, sizeof(tag_buf), enc->codec_tag);
868
        snprintf(buf1, sizeof(buf1), "%s / 0x%04X", tag_buf, enc->codec_tag);
869
        codec_name = buf1;
870
    }
871

    
872
    switch(enc->codec_type) {
873
    case AVMEDIA_TYPE_VIDEO:
874
        snprintf(buf, buf_size,
875
                 "Video: %s%s",
876
                 codec_name, enc->mb_decision ? " (hq)" : "");
877
        if (enc->pix_fmt != PIX_FMT_NONE) {
878
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
879
                     ", %s",
880
                     avcodec_get_pix_fmt_name(enc->pix_fmt));
881
        }
882
        if (enc->width) {
883
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
884
                     ", %dx%d",
885
                     enc->width, enc->height);
886
            if (enc->sample_aspect_ratio.num) {
887
                av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
888
                          enc->width*enc->sample_aspect_ratio.num,
889
                          enc->height*enc->sample_aspect_ratio.den,
890
                          1024*1024);
891
                snprintf(buf + strlen(buf), buf_size - strlen(buf),
892
                         " [PAR %d:%d DAR %d:%d]",
893
                         enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
894
                         display_aspect_ratio.num, display_aspect_ratio.den);
895
            }
896
            if(av_log_get_level() >= AV_LOG_DEBUG){
897
                int g= av_gcd(enc->time_base.num, enc->time_base.den);
898
                snprintf(buf + strlen(buf), buf_size - strlen(buf),
899
                     ", %d/%d",
900
                     enc->time_base.num/g, enc->time_base.den/g);
901
            }
902
        }
903
        if (encode) {
904
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
905
                     ", q=%d-%d", enc->qmin, enc->qmax);
906
        }
907
        break;
908
    case AVMEDIA_TYPE_AUDIO:
909
        snprintf(buf, buf_size,
910
                 "Audio: %s",
911
                 codec_name);
912
        if (enc->sample_rate) {
913
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
914
                     ", %d Hz", enc->sample_rate);
915
        }
916
        av_strlcat(buf, ", ", buf_size);
917
        avcodec_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
918
        if (enc->sample_fmt != SAMPLE_FMT_NONE) {
919
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
920
                     ", %s", avcodec_get_sample_fmt_name(enc->sample_fmt));
921
        }
922
        break;
923
    case AVMEDIA_TYPE_DATA:
924
        snprintf(buf, buf_size, "Data: %s", codec_name);
925
        break;
926
    case AVMEDIA_TYPE_SUBTITLE:
927
        snprintf(buf, buf_size, "Subtitle: %s", codec_name);
928
        break;
929
    case AVMEDIA_TYPE_ATTACHMENT:
930
        snprintf(buf, buf_size, "Attachment: %s", codec_name);
931
        break;
932
    default:
933
        snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
934
        return;
935
    }
936
    if (encode) {
937
        if (enc->flags & CODEC_FLAG_PASS1)
938
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
939
                     ", pass 1");
940
        if (enc->flags & CODEC_FLAG_PASS2)
941
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
942
                     ", pass 2");
943
    }
944
    bitrate = get_bit_rate(enc);
945
    if (bitrate != 0) {
946
        snprintf(buf + strlen(buf), buf_size - strlen(buf),
947
                 ", %d kb/s", bitrate / 1000);
948
    }
949
}
950

    
951
unsigned avcodec_version( void )
952
{
953
  return LIBAVCODEC_VERSION_INT;
954
}
955

    
956
const char *avcodec_configuration(void)
957
{
958
    return FFMPEG_CONFIGURATION;
959
}
960

    
961
const char *avcodec_license(void)
962
{
963
#define LICENSE_PREFIX "libavcodec license: "
964
    return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
965
}
966

    
967
void avcodec_init(void)
968
{
969
    static int initialized = 0;
970

    
971
    if (initialized != 0)
972
        return;
973
    initialized = 1;
974

    
975
    dsputil_static_init();
976
}
977

    
978
void avcodec_flush_buffers(AVCodecContext *avctx)
979
{
980
    if(avctx->codec->flush)
981
        avctx->codec->flush(avctx);
982
}
983

    
984
void avcodec_default_free_buffers(AVCodecContext *s){
985
    int i, j;
986

    
987
    if(s->internal_buffer==NULL) return;
988

    
989
    if (s->internal_buffer_count)
990
        av_log(s, AV_LOG_WARNING, "Found %i unreleased buffers!\n", s->internal_buffer_count);
991
    for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
992
        InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
993
        for(j=0; j<4; j++){
994
            av_freep(&buf->base[j]);
995
            buf->data[j]= NULL;
996
        }
997
    }
998
    av_freep(&s->internal_buffer);
999

    
1000
    s->internal_buffer_count=0;
1001
}
1002

    
1003
char av_get_pict_type_char(int pict_type){
1004
    switch(pict_type){
1005
    case FF_I_TYPE: return 'I';
1006
    case FF_P_TYPE: return 'P';
1007
    case FF_B_TYPE: return 'B';
1008
    case FF_S_TYPE: return 'S';
1009
    case FF_SI_TYPE:return 'i';
1010
    case FF_SP_TYPE:return 'p';
1011
    case FF_BI_TYPE:return 'b';
1012
    default:        return '?';
1013
    }
1014
}
1015

    
1016
int av_get_bits_per_sample(enum CodecID codec_id){
1017
    switch(codec_id){
1018
    case CODEC_ID_ADPCM_SBPRO_2:
1019
        return 2;
1020
    case CODEC_ID_ADPCM_SBPRO_3:
1021
        return 3;
1022
    case CODEC_ID_ADPCM_SBPRO_4:
1023
    case CODEC_ID_ADPCM_CT:
1024
    case CODEC_ID_ADPCM_IMA_WAV:
1025
    case CODEC_ID_ADPCM_MS:
1026
    case CODEC_ID_ADPCM_YAMAHA:
1027
        return 4;
1028
    case CODEC_ID_PCM_ALAW:
1029
    case CODEC_ID_PCM_MULAW:
1030
    case CODEC_ID_PCM_S8:
1031
    case CODEC_ID_PCM_U8:
1032
    case CODEC_ID_PCM_ZORK:
1033
        return 8;
1034
    case CODEC_ID_PCM_S16BE:
1035
    case CODEC_ID_PCM_S16LE:
1036
    case CODEC_ID_PCM_S16LE_PLANAR:
1037
    case CODEC_ID_PCM_U16BE:
1038
    case CODEC_ID_PCM_U16LE:
1039
        return 16;
1040
    case CODEC_ID_PCM_S24DAUD:
1041
    case CODEC_ID_PCM_S24BE:
1042
    case CODEC_ID_PCM_S24LE:
1043
    case CODEC_ID_PCM_U24BE:
1044
    case CODEC_ID_PCM_U24LE:
1045
        return 24;
1046
    case CODEC_ID_PCM_S32BE:
1047
    case CODEC_ID_PCM_S32LE:
1048
    case CODEC_ID_PCM_U32BE:
1049
    case CODEC_ID_PCM_U32LE:
1050
    case CODEC_ID_PCM_F32BE:
1051
    case CODEC_ID_PCM_F32LE:
1052
        return 32;
1053
    case CODEC_ID_PCM_F64BE:
1054
    case CODEC_ID_PCM_F64LE:
1055
        return 64;
1056
    default:
1057
        return 0;
1058
    }
1059
}
1060

    
1061
int av_get_bits_per_sample_format(enum SampleFormat sample_fmt) {
1062
    switch (sample_fmt) {
1063
    case SAMPLE_FMT_U8:
1064
        return 8;
1065
    case SAMPLE_FMT_S16:
1066
        return 16;
1067
    case SAMPLE_FMT_S32:
1068
    case SAMPLE_FMT_FLT:
1069
        return 32;
1070
    case SAMPLE_FMT_DBL:
1071
        return 64;
1072
    default:
1073
        return 0;
1074
    }
1075
}
1076

    
1077
#if !HAVE_THREADS
1078
int avcodec_thread_init(AVCodecContext *s, int thread_count){
1079
    s->thread_count = thread_count;
1080
    return -1;
1081
}
1082
#endif
1083

    
1084
unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
1085
{
1086
    unsigned int n = 0;
1087

    
1088
    while(v >= 0xff) {
1089
        *s++ = 0xff;
1090
        v -= 0xff;
1091
        n++;
1092
    }
1093
    *s = v;
1094
    n++;
1095
    return n;
1096
}
1097

    
1098
#if LIBAVCODEC_VERSION_MAJOR < 53
1099
#include "libavcore/parseutils.h"
1100

    
1101
int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str)
1102
{
1103
    return av_parse_video_size(width_ptr, height_ptr, str);
1104
}
1105

    
1106
int av_parse_video_frame_rate(AVRational *frame_rate, const char *arg)
1107
{
1108
    return av_parse_video_rate(frame_rate, arg);
1109
}
1110
#endif
1111

    
1112
int ff_match_2uint16(const uint16_t (*tab)[2], int size, int a, int b){
1113
    int i;
1114
    for(i=0; i<size && !(tab[i][0]==a && tab[i][1]==b); i++);
1115
    return i;
1116
}
1117

    
1118
void av_log_missing_feature(void *avc, const char *feature, int want_sample)
1119
{
1120
    av_log(avc, AV_LOG_WARNING, "%s not implemented. Update your FFmpeg "
1121
            "version to the newest one from SVN. If the problem still "
1122
            "occurs, it means that your file has a feature which has not "
1123
            "been implemented.", feature);
1124
    if(want_sample)
1125
        av_log_ask_for_sample(avc, NULL);
1126
    else
1127
        av_log(avc, AV_LOG_WARNING, "\n");
1128
}
1129

    
1130
void av_log_ask_for_sample(void *avc, const char *msg)
1131
{
1132
    if (msg)
1133
        av_log(avc, AV_LOG_WARNING, "%s ", msg);
1134
    av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
1135
            "of this file to ftp://upload.ffmpeg.org/MPlayer/incoming/ "
1136
            "and contact the ffmpeg-devel mailing list.\n");
1137
}
1138

    
1139
static AVHWAccel *first_hwaccel = NULL;
1140

    
1141
void av_register_hwaccel(AVHWAccel *hwaccel)
1142
{
1143
    AVHWAccel **p = &first_hwaccel;
1144
    while (*p)
1145
        p = &(*p)->next;
1146
    *p = hwaccel;
1147
    hwaccel->next = NULL;
1148
}
1149

    
1150
AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel)
1151
{
1152
    return hwaccel ? hwaccel->next : first_hwaccel;
1153
}
1154

    
1155
AVHWAccel *ff_find_hwaccel(enum CodecID codec_id, enum PixelFormat pix_fmt)
1156
{
1157
    AVHWAccel *hwaccel=NULL;
1158

    
1159
    while((hwaccel= av_hwaccel_next(hwaccel))){
1160
        if (   hwaccel->id      == codec_id
1161
            && hwaccel->pix_fmt == pix_fmt)
1162
            return hwaccel;
1163
    }
1164
    return NULL;
1165
}
1166

    
1167
int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))
1168
{
1169
    if (ff_lockmgr_cb) {
1170
        if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_DESTROY))
1171
            return -1;
1172
    }
1173

    
1174
    ff_lockmgr_cb = cb;
1175

    
1176
    if (ff_lockmgr_cb) {
1177
        if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_CREATE))
1178
            return -1;
1179
    }
1180
    return 0;
1181
}
1182

    
1183
unsigned int ff_toupper4(unsigned int x)
1184
{
1185
    return     toupper( x     &0xFF)
1186
            + (toupper((x>>8 )&0xFF)<<8 )
1187
            + (toupper((x>>16)&0xFF)<<16)
1188
            + (toupper((x>>24)&0xFF)<<24);
1189
}