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ffmpeg / libavcodec / utils.c @ a3bc7a9e

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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>
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 *
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 * This file is part of FFmpeg.
7
 *
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 * FFmpeg is free software; you can redistribute it and/or
9
 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
11
 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * 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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 *
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 * 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
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 */
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 "libavutil/audioconvert.h"
33
#include "libavutil/imgutils.h"
34
#include "libavutil/samplefmt.h"
35
#include "avcodec.h"
36
#include "dsputil.h"
37
#include "libavutil/opt.h"
38
#include "imgconvert.h"
39
#include "thread.h"
40
#include "audioconvert.h"
41
#include "internal.h"
42
#include <stdlib.h>
43
#include <stdarg.h>
44
#include <limits.h>
45
#include <float.h>
46

    
47
static int volatile entangled_thread_counter=0;
48
static int (*ff_lockmgr_cb)(void **mutex, enum AVLockOp op);
49
static void *codec_mutex;
50

    
51
void *av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)
52
{
53
    if(min_size < *size)
54
        return ptr;
55

    
56
    min_size= FFMAX(17*min_size/16 + 32, min_size);
57

    
58
    ptr= av_realloc(ptr, min_size);
59
    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
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        min_size= 0;
61

    
62
    *size= min_size;
63

    
64
    return ptr;
65
}
66

    
67
void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size)
68
{
69
    void **p = ptr;
70
    if (min_size < *size)
71
        return;
72
    min_size= FFMAX(17*min_size/16 + 32, min_size);
73
    av_free(*p);
74
    *p = av_malloc(min_size);
75
    if (!*p) min_size = 0;
76
    *size= min_size;
77
}
78

    
79
/* encoder management */
80
static AVCodec *first_avcodec = NULL;
81

    
82
AVCodec *av_codec_next(AVCodec *c){
83
    if(c) return c->next;
84
    else  return first_avcodec;
85
}
86

    
87
void avcodec_register(AVCodec *codec)
88
{
89
    AVCodec **p;
90
    avcodec_init();
91
    p = &first_avcodec;
92
    while (*p != NULL) p = &(*p)->next;
93
    *p = codec;
94
    codec->next = NULL;
95
}
96

    
97
unsigned avcodec_get_edge_width(void)
98
{
99
    return EDGE_WIDTH;
100
}
101

    
102
void avcodec_set_dimensions(AVCodecContext *s, int width, int height){
103
    s->coded_width = width;
104
    s->coded_height= height;
105
    s->width = -((-width )>>s->lowres);
106
    s->height= -((-height)>>s->lowres);
107
}
108

    
109
typedef struct InternalBuffer{
110
    int last_pic_num;
111
    uint8_t *base[4];
112
    uint8_t *data[4];
113
    int linesize[4];
114
    int width, height;
115
    enum PixelFormat pix_fmt;
116
}InternalBuffer;
117

    
118
#define INTERNAL_BUFFER_SIZE 32
119

    
120
void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height, int linesize_align[4]){
121
    int w_align= 1;
122
    int h_align= 1;
123

    
124
    switch(s->pix_fmt){
125
    case PIX_FMT_YUV420P:
126
    case PIX_FMT_YUYV422:
127
    case PIX_FMT_UYVY422:
128
    case PIX_FMT_YUV422P:
129
    case PIX_FMT_YUV440P:
130
    case PIX_FMT_YUV444P:
131
    case PIX_FMT_GRAY8:
132
    case PIX_FMT_GRAY16BE:
133
    case PIX_FMT_GRAY16LE:
134
    case PIX_FMT_YUVJ420P:
135
    case PIX_FMT_YUVJ422P:
136
    case PIX_FMT_YUVJ440P:
137
    case PIX_FMT_YUVJ444P:
138
    case PIX_FMT_YUVA420P:
139
    case PIX_FMT_YUV420P9LE:
140
    case PIX_FMT_YUV420P9BE:
141
    case PIX_FMT_YUV420P10LE:
142
    case PIX_FMT_YUV420P10BE:
143
    case PIX_FMT_YUV422P10LE:
144
    case PIX_FMT_YUV422P10BE:
145
        w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
146
        h_align= 16;
147
        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 || s->codec_id == CODEC_ID_H264)
148
            h_align= 32; // interlaced is rounded up to 2 MBs
149
        break;
150
    case PIX_FMT_YUV411P:
151
    case PIX_FMT_UYYVYY411:
152
        w_align=32;
153
        h_align=8;
154
        break;
155
    case PIX_FMT_YUV410P:
156
        if(s->codec_id == CODEC_ID_SVQ1){
157
            w_align=64;
158
            h_align=64;
159
        }
160
    case PIX_FMT_RGB555:
161
        if(s->codec_id == CODEC_ID_RPZA){
162
            w_align=4;
163
            h_align=4;
164
        }
165
    case PIX_FMT_PAL8:
166
    case PIX_FMT_BGR8:
167
    case PIX_FMT_RGB8:
168
        if(s->codec_id == CODEC_ID_SMC){
169
            w_align=4;
170
            h_align=4;
171
        }
172
        break;
173
    case PIX_FMT_BGR24:
174
        if((s->codec_id == CODEC_ID_MSZH) || (s->codec_id == CODEC_ID_ZLIB)){
175
            w_align=4;
176
            h_align=4;
177
        }
178
        break;
179
    default:
180
        w_align= 1;
181
        h_align= 1;
182
        break;
183
    }
184

    
185
    *width = FFALIGN(*width , w_align);
186
    *height= FFALIGN(*height, h_align);
187
    if(s->codec_id == CODEC_ID_H264 || s->lowres)
188
        *height+=2; // some of the optimized chroma MC reads one line too much
189
                    // which is also done in mpeg decoders with lowres > 0
190

    
191
    linesize_align[0] =
192
    linesize_align[1] =
193
    linesize_align[2] =
194
    linesize_align[3] = STRIDE_ALIGN;
195
//STRIDE_ALIGN is 8 for SSE* but this does not work for SVQ1 chroma planes
196
//we could change STRIDE_ALIGN to 16 for x86/sse but it would increase the
197
//picture size unneccessarily in some cases. The solution here is not
198
//pretty and better ideas are welcome!
199
#if HAVE_MMX
200
    if(s->codec_id == CODEC_ID_SVQ1 || s->codec_id == CODEC_ID_VP5 ||
201
       s->codec_id == CODEC_ID_VP6 || s->codec_id == CODEC_ID_VP6F ||
202
       s->codec_id == CODEC_ID_VP6A) {
203
        linesize_align[0] =
204
        linesize_align[1] =
205
        linesize_align[2] = 16;
206
    }
207
#endif
208
}
209

    
210
void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
211
    int chroma_shift = av_pix_fmt_descriptors[s->pix_fmt].log2_chroma_w;
212
    int linesize_align[4];
213
    int align;
214
    avcodec_align_dimensions2(s, width, height, linesize_align);
215
    align = FFMAX(linesize_align[0], linesize_align[3]);
216
    linesize_align[1] <<= chroma_shift;
217
    linesize_align[2] <<= chroma_shift;
218
    align = FFMAX3(align, linesize_align[1], linesize_align[2]);
219
    *width=FFALIGN(*width, align);
220
}
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
        if(s->active_thread_type&FF_THREAD_FRAME) {
258
            av_log_missing_feature(s, "Width/height changing with frame threads is", 0);
259
            return -1;
260
        }
261

    
262
        for(i=0; i<4; i++){
263
            av_freep(&buf->base[i]);
264
            buf->data[i]= NULL;
265
        }
266
    }
267

    
268
    if(buf->base[0]){
269
        pic->age= *picture_number - buf->last_pic_num;
270
        buf->last_pic_num= *picture_number;
271
    }else{
272
        int h_chroma_shift, v_chroma_shift;
273
        int size[4] = {0};
274
        int tmpsize;
275
        int unaligned;
276
        AVPicture picture;
277
        int stride_align[4];
278
        const int pixel_size = av_pix_fmt_descriptors[s->pix_fmt].comp[0].step_minus1+1;
279

    
280
        avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
281

    
282
        avcodec_align_dimensions2(s, &w, &h, stride_align);
283

    
284
        if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
285
            w+= EDGE_WIDTH*2;
286
            h+= EDGE_WIDTH*2;
287
        }
288

    
289
        do {
290
            // NOTE: do not align linesizes individually, this breaks e.g. assumptions
291
            // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
292
            av_image_fill_linesizes(picture.linesize, s->pix_fmt, w);
293
            // increase alignment of w for next try (rhs gives the lowest bit set in w)
294
            w += w & ~(w-1);
295

    
296
            unaligned = 0;
297
            for (i=0; i<4; i++){
298
                unaligned |= picture.linesize[i] % stride_align[i];
299
            }
300
        } while (unaligned);
301

    
302
        tmpsize = av_image_fill_pointers(picture.data, s->pix_fmt, h, NULL, picture.linesize);
303
        if (tmpsize < 0)
304
            return -1;
305

    
306
        for (i=0; i<3 && picture.data[i+1]; i++)
307
            size[i] = picture.data[i+1] - picture.data[i];
308
        size[i] = tmpsize - (picture.data[i] - picture.data[0]);
309

    
310
        buf->last_pic_num= -256*256*256*64;
311
        memset(buf->base, 0, sizeof(buf->base));
312
        memset(buf->data, 0, sizeof(buf->data));
313

    
314
        for(i=0; i<4 && size[i]; i++){
315
            const int h_shift= i==0 ? 0 : h_chroma_shift;
316
            const int v_shift= i==0 ? 0 : v_chroma_shift;
317

    
318
            buf->linesize[i]= picture.linesize[i];
319

    
320
            buf->base[i]= av_malloc(size[i]+16); //FIXME 16
321
            if(buf->base[i]==NULL) return -1;
322
            memset(buf->base[i], 128, size[i]);
323

    
324
            // no edge if EDGE EMU or not planar YUV
325
            if((s->flags&CODEC_FLAG_EMU_EDGE) || !size[2])
326
                buf->data[i] = buf->base[i];
327
            else
328
                buf->data[i] = buf->base[i] + FFALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (pixel_size*EDGE_WIDTH>>h_shift), stride_align[i]);
329
        }
330
        if(size[1] && !size[2])
331
            ff_set_systematic_pal2((uint32_t*)buf->data[1], s->pix_fmt);
332
        buf->width  = s->width;
333
        buf->height = s->height;
334
        buf->pix_fmt= s->pix_fmt;
335
        pic->age= 256*256*256*64;
336
    }
337
    pic->type= FF_BUFFER_TYPE_INTERNAL;
338

    
339
    for(i=0; i<4; i++){
340
        pic->base[i]= buf->base[i];
341
        pic->data[i]= buf->data[i];
342
        pic->linesize[i]= buf->linesize[i];
343
    }
344
    s->internal_buffer_count++;
345

    
346
    if (s->pkt) {
347
        pic->pkt_pts = s->pkt->pts;
348
        pic->pkt_pos = s->pkt->pos;
349
    } else {
350
        pic->pkt_pts = AV_NOPTS_VALUE;
351
        pic->pkt_pos = -1;
352
    }
353
    pic->reordered_opaque= s->reordered_opaque;
354
    pic->sample_aspect_ratio = s->sample_aspect_ratio;
355
    pic->width               = s->width;
356
    pic->height              = s->height;
357
    pic->format              = s->pix_fmt;
358

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

    
362
    return 0;
363
}
364

    
365
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
366
    int i;
367
    InternalBuffer *buf, *last;
368

    
369
    assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
370
    assert(s->internal_buffer_count);
371

    
372
    if(s->internal_buffer){
373
    buf = NULL; /* avoids warning */
374
    for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
375
        buf= &((InternalBuffer*)s->internal_buffer)[i];
376
        if(buf->data[0] == pic->data[0])
377
            break;
378
    }
379
    assert(i < s->internal_buffer_count);
380
    s->internal_buffer_count--;
381
    last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
382

    
383
    FFSWAP(InternalBuffer, *buf, *last);
384
    }
385

    
386
    for(i=0; i<4; i++){
387
        pic->data[i]=NULL;
388
//        pic->base[i]=NULL;
389
    }
390
//printf("R%X\n", pic->opaque);
391

    
392
    if(s->debug&FF_DEBUG_BUFFERS)
393
        av_log(s, AV_LOG_DEBUG, "default_release_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
394
}
395

    
396
int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
397
    AVFrame temp_pic;
398
    int i;
399

    
400
    /* If no picture return a new buffer */
401
    if(pic->data[0] == NULL) {
402
        /* We will copy from buffer, so must be readable */
403
        pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
404
        return s->get_buffer(s, pic);
405
    }
406

    
407
    /* If internal buffer type return the same buffer */
408
    if(pic->type == FF_BUFFER_TYPE_INTERNAL) {
409
        if(s->pkt) pic->pkt_pts= s->pkt->pts;
410
        else       pic->pkt_pts= AV_NOPTS_VALUE;
411
        pic->reordered_opaque= s->reordered_opaque;
412
        return 0;
413
    }
414

    
415
    /*
416
     * Not internal type and reget_buffer not overridden, emulate cr buffer
417
     */
418
    temp_pic = *pic;
419
    for(i = 0; i < 4; i++)
420
        pic->data[i] = pic->base[i] = NULL;
421
    pic->opaque = NULL;
422
    /* Allocate new frame */
423
    if (s->get_buffer(s, pic))
424
        return -1;
425
    /* Copy image data from old buffer to new buffer */
426
    av_picture_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
427
             s->height);
428
    s->release_buffer(s, &temp_pic); // Release old frame
429
    return 0;
430
}
431

    
432
int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size){
433
    int i;
434

    
435
    for(i=0; i<count; i++){
436
        int r= func(c, (char*)arg + i*size);
437
        if(ret) ret[i]= r;
438
    }
439
    return 0;
440
}
441

    
442
int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr),void *arg, int *ret, int count){
443
    int i;
444

    
445
    for(i=0; i<count; i++){
446
        int r= func(c, arg, i, 0);
447
        if(ret) ret[i]= r;
448
    }
449
    return 0;
450
}
451

    
452
enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat *fmt){
453
    while (*fmt != PIX_FMT_NONE && ff_is_hwaccel_pix_fmt(*fmt))
454
        ++fmt;
455
    return fmt[0];
456
}
457

    
458
void avcodec_get_frame_defaults(AVFrame *pic){
459
    memset(pic, 0, sizeof(AVFrame));
460

    
461
    pic->pts = pic->best_effort_timestamp = AV_NOPTS_VALUE;
462
    pic->pkt_pos = -1;
463
    pic->key_frame= 1;
464
    pic->sample_aspect_ratio = (AVRational){0, 1};
465
    pic->format = -1;           /* unknown */
466
}
467

    
468
AVFrame *avcodec_alloc_frame(void){
469
    AVFrame *pic= av_malloc(sizeof(AVFrame));
470

    
471
    if(pic==NULL) return NULL;
472

    
473
    avcodec_get_frame_defaults(pic);
474

    
475
    return pic;
476
}
477

    
478
static void avcodec_get_subtitle_defaults(AVSubtitle *sub)
479
{
480
    memset(sub, 0, sizeof(*sub));
481
    sub->pts = AV_NOPTS_VALUE;
482
}
483

    
484
int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
485
{
486
    int ret = 0;
487

    
488
    /* If there is a user-supplied mutex locking routine, call it. */
489
    if (ff_lockmgr_cb) {
490
        if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
491
            return -1;
492
    }
493

    
494
    entangled_thread_counter++;
495
    if(entangled_thread_counter != 1){
496
        av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
497
        ret = -1;
498
        goto end;
499
    }
500

    
501
    if(avctx->codec || !codec) {
502
        ret = AVERROR(EINVAL);
503
        goto end;
504
    }
505

    
506
    if (codec->priv_data_size > 0) {
507
      if(!avctx->priv_data){
508
        avctx->priv_data = av_mallocz(codec->priv_data_size);
509
        if (!avctx->priv_data) {
510
            ret = AVERROR(ENOMEM);
511
            goto end;
512
        }
513
        if(codec->priv_class){ //this can be droped once all user apps use   avcodec_get_context_defaults3()
514
            *(AVClass**)avctx->priv_data= codec->priv_class;
515
            av_opt_set_defaults(avctx->priv_data);
516
        }
517
      }
518
    } else {
519
        avctx->priv_data = NULL;
520
    }
521

    
522
    if(avctx->coded_width && avctx->coded_height)
523
        avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
524
    else if(avctx->width && avctx->height)
525
        avcodec_set_dimensions(avctx, avctx->width, avctx->height);
526

    
527
    if ((avctx->coded_width || avctx->coded_height || avctx->width || avctx->height)
528
        && (  av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx) < 0
529
           || av_image_check_size(avctx->width,       avctx->height,       0, avctx) < 0)) {
530
        av_log(avctx, AV_LOG_WARNING, "ignoring invalid width/height values\n");
531
        avcodec_set_dimensions(avctx, 0, 0);
532
    }
533

    
534
    /* if the decoder init function was already called previously,
535
       free the already allocated subtitle_header before overwriting it */
536
    if (codec->decode)
537
        av_freep(&avctx->subtitle_header);
538

    
539
#define SANE_NB_CHANNELS 128U
540
    if (avctx->channels > SANE_NB_CHANNELS) {
541
        ret = AVERROR(EINVAL);
542
        goto free_and_end;
543
    }
544

    
545
    avctx->codec = codec;
546
    if ((avctx->codec_type == AVMEDIA_TYPE_UNKNOWN || avctx->codec_type == codec->type) &&
547
        avctx->codec_id == CODEC_ID_NONE) {
548
        avctx->codec_type = codec->type;
549
        avctx->codec_id   = codec->id;
550
    }
551
    if (avctx->codec_id != codec->id || (avctx->codec_type != codec->type
552
                           && avctx->codec_type != AVMEDIA_TYPE_ATTACHMENT)) {
553
        av_log(avctx, AV_LOG_ERROR, "codec type or id mismatches\n");
554
        ret = AVERROR(EINVAL);
555
        goto free_and_end;
556
    }
557
    avctx->frame_number = 0;
558

    
559
    if (HAVE_THREADS && !avctx->thread_opaque) {
560
        ret = ff_thread_init(avctx);
561
        if (ret < 0) {
562
            goto free_and_end;
563
        }
564
    }
565

    
566
    if (avctx->codec->max_lowres < avctx->lowres) {
567
        av_log(avctx, AV_LOG_ERROR, "The maximum value for lowres supported by the decoder is %d\n",
568
               avctx->codec->max_lowres);
569
        ret = AVERROR(EINVAL);
570
        goto free_and_end;
571
    }
572
    if (avctx->codec->encode) {
573
        int i;
574
        if (avctx->codec->sample_fmts) {
575
            for (i = 0; avctx->codec->sample_fmts[i] != AV_SAMPLE_FMT_NONE; i++)
576
                if (avctx->sample_fmt == avctx->codec->sample_fmts[i])
577
                    break;
578
            if (avctx->codec->sample_fmts[i] == AV_SAMPLE_FMT_NONE) {
579
                av_log(avctx, AV_LOG_ERROR, "Specified sample_fmt is not supported.\n");
580
                ret = AVERROR(EINVAL);
581
                goto free_and_end;
582
            }
583
        }
584
        if (avctx->codec->supported_samplerates) {
585
            for (i = 0; avctx->codec->supported_samplerates[i] != 0; i++)
586
                if (avctx->sample_rate == avctx->codec->supported_samplerates[i])
587
                    break;
588
            if (avctx->codec->supported_samplerates[i] == 0) {
589
                av_log(avctx, AV_LOG_ERROR, "Specified sample_rate is not supported\n");
590
                ret = AVERROR(EINVAL);
591
                goto free_and_end;
592
            }
593
        }
594
        if (avctx->codec->channel_layouts) {
595
            if (!avctx->channel_layout) {
596
                av_log(avctx, AV_LOG_WARNING, "channel_layout not specified\n");
597
            } else {
598
                for (i = 0; avctx->codec->channel_layouts[i] != 0; i++)
599
                    if (avctx->channel_layout == avctx->codec->channel_layouts[i])
600
                        break;
601
                if (avctx->codec->channel_layouts[i] == 0) {
602
                    av_log(avctx, AV_LOG_ERROR, "Specified channel_layout is not supported\n");
603
                    ret = AVERROR(EINVAL);
604
                    goto free_and_end;
605
                }
606
            }
607
        }
608
        if (avctx->channel_layout && avctx->channels) {
609
            if (av_get_channel_layout_nb_channels(avctx->channel_layout) != avctx->channels) {
610
                av_log(avctx, AV_LOG_ERROR, "channel layout does not match number of channels\n");
611
                ret = AVERROR(EINVAL);
612
                goto free_and_end;
613
            }
614
        } else if (avctx->channel_layout) {
615
            avctx->channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
616
        }
617
    }
618

    
619
    avctx->pts_correction_num_faulty_pts =
620
    avctx->pts_correction_num_faulty_dts = 0;
621
    avctx->pts_correction_last_pts =
622
    avctx->pts_correction_last_dts = INT64_MIN;
623

    
624
    if(avctx->codec->init && !(avctx->active_thread_type&FF_THREAD_FRAME)){
625
        ret = avctx->codec->init(avctx);
626
        if (ret < 0) {
627
            goto free_and_end;
628
        }
629
    }
630

    
631
    ret=0;
632
end:
633
    entangled_thread_counter--;
634

    
635
    /* Release any user-supplied mutex. */
636
    if (ff_lockmgr_cb) {
637
        (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
638
    }
639
    return ret;
640
free_and_end:
641
    av_freep(&avctx->priv_data);
642
    avctx->codec= NULL;
643
    goto end;
644
}
645

    
646
int attribute_align_arg avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
647
                         const short *samples)
648
{
649
    if(buf_size < FF_MIN_BUFFER_SIZE && 0){
650
        av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
651
        return -1;
652
    }
653
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || samples){
654
        int ret = avctx->codec->encode(avctx, buf, buf_size, samples);
655
        avctx->frame_number++;
656
        return ret;
657
    }else
658
        return 0;
659
}
660

    
661
int attribute_align_arg avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
662
                         const AVFrame *pict)
663
{
664
    if(buf_size < FF_MIN_BUFFER_SIZE){
665
        av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
666
        return -1;
667
    }
668
    if(av_image_check_size(avctx->width, avctx->height, 0, avctx))
669
        return -1;
670
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){
671
        int ret = avctx->codec->encode(avctx, buf, buf_size, pict);
672
        avctx->frame_number++;
673
        emms_c(); //needed to avoid an emms_c() call before every return;
674

    
675
        return ret;
676
    }else
677
        return 0;
678
}
679

    
680
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
681
                            const AVSubtitle *sub)
682
{
683
    int ret;
684
    if(sub->start_display_time) {
685
        av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
686
        return -1;
687
    }
688

    
689
    ret = avctx->codec->encode(avctx, buf, buf_size, sub);
690
    avctx->frame_number++;
691
    return ret;
692
}
693

    
694
/**
695
 * Attempt to guess proper monotonic timestamps for decoded video frames
696
 * which might have incorrect times. Input timestamps may wrap around, in
697
 * which case the output will as well.
698
 *
699
 * @param pts the pts field of the decoded AVPacket, as passed through
700
 * AVFrame.pkt_pts
701
 * @param dts the dts field of the decoded AVPacket
702
 * @return one of the input values, may be AV_NOPTS_VALUE
703
 */
704
static int64_t guess_correct_pts(AVCodecContext *ctx,
705
                                 int64_t reordered_pts, int64_t dts)
706
{
707
    int64_t pts = AV_NOPTS_VALUE;
708

    
709
    if (dts != AV_NOPTS_VALUE) {
710
        ctx->pts_correction_num_faulty_dts += dts <= ctx->pts_correction_last_dts;
711
        ctx->pts_correction_last_dts = dts;
712
    }
713
    if (reordered_pts != AV_NOPTS_VALUE) {
714
        ctx->pts_correction_num_faulty_pts += reordered_pts <= ctx->pts_correction_last_pts;
715
        ctx->pts_correction_last_pts = reordered_pts;
716
    }
717
    if ((ctx->pts_correction_num_faulty_pts<=ctx->pts_correction_num_faulty_dts || dts == AV_NOPTS_VALUE)
718
       && reordered_pts != AV_NOPTS_VALUE)
719
        pts = reordered_pts;
720
    else
721
        pts = dts;
722

    
723
    return pts;
724
}
725

    
726
int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
727
                         int *got_picture_ptr,
728
                         AVPacket *avpkt)
729
{
730
    int ret;
731

    
732
    *got_picture_ptr= 0;
733
    if((avctx->coded_width||avctx->coded_height) && av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx))
734
        return -1;
735

    
736
    avctx->pkt = avpkt;
737

    
738
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size || (avctx->active_thread_type&FF_THREAD_FRAME)){
739
        if (HAVE_PTHREADS && avctx->active_thread_type&FF_THREAD_FRAME)
740
             ret = ff_thread_decode_frame(avctx, picture, got_picture_ptr,
741
                                          avpkt);
742
        else {
743
            ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
744
                              avpkt);
745
            picture->pkt_dts= avpkt->dts;
746
            picture->pkt_pos= avpkt->pos;
747
            if (!picture->sample_aspect_ratio.num)
748
                picture->sample_aspect_ratio = avctx->sample_aspect_ratio;
749
            if (!picture->width)
750
                picture->width = avctx->width;
751
            if (!picture->height)
752
                picture->height = avctx->height;
753
            if (picture->format == PIX_FMT_NONE)
754
                picture->format = avctx->pix_fmt;
755
        }
756

    
757
        emms_c(); //needed to avoid an emms_c() call before every return;
758

    
759

    
760
        if (*got_picture_ptr){
761
            avctx->frame_number++;
762
            picture->best_effort_timestamp = guess_correct_pts(avctx,
763
                                                            picture->pkt_pts,
764
                                                            picture->pkt_dts);
765
        }
766
    }else
767
        ret= 0;
768

    
769
    return ret;
770
}
771

    
772
int attribute_align_arg avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
773
                         int *frame_size_ptr,
774
                         AVPacket *avpkt)
775
{
776
    int ret;
777

    
778
    avctx->pkt = avpkt;
779

    
780
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size){
781
        //FIXME remove the check below _after_ ensuring that all audio check that the available space is enough
782
        if(*frame_size_ptr < AVCODEC_MAX_AUDIO_FRAME_SIZE){
783
            av_log(avctx, AV_LOG_ERROR, "buffer smaller than AVCODEC_MAX_AUDIO_FRAME_SIZE\n");
784
            return -1;
785
        }
786
        if(*frame_size_ptr < FF_MIN_BUFFER_SIZE ||
787
        *frame_size_ptr < avctx->channels * avctx->frame_size * sizeof(int16_t)){
788
            av_log(avctx, AV_LOG_ERROR, "buffer %d too small\n", *frame_size_ptr);
789
            return -1;
790
        }
791

    
792
        ret = avctx->codec->decode(avctx, samples, frame_size_ptr, avpkt);
793
        avctx->frame_number++;
794
    }else{
795
        ret= 0;
796
        *frame_size_ptr=0;
797
    }
798
    return ret;
799
}
800

    
801
int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
802
                            int *got_sub_ptr,
803
                            AVPacket *avpkt)
804
{
805
    int ret;
806

    
807
    avctx->pkt = avpkt;
808
    *got_sub_ptr = 0;
809
    avcodec_get_subtitle_defaults(sub);
810
    ret = avctx->codec->decode(avctx, sub, got_sub_ptr, avpkt);
811
    if (*got_sub_ptr)
812
        avctx->frame_number++;
813
    return ret;
814
}
815

    
816
void avsubtitle_free(AVSubtitle *sub)
817
{
818
    int i;
819

    
820
    for (i = 0; i < sub->num_rects; i++)
821
    {
822
        av_freep(&sub->rects[i]->pict.data[0]);
823
        av_freep(&sub->rects[i]->pict.data[1]);
824
        av_freep(&sub->rects[i]->pict.data[2]);
825
        av_freep(&sub->rects[i]->pict.data[3]);
826
        av_freep(&sub->rects[i]->text);
827
        av_freep(&sub->rects[i]->ass);
828
        av_freep(&sub->rects[i]);
829
    }
830

    
831
    av_freep(&sub->rects);
832

    
833
    memset(sub, 0, sizeof(AVSubtitle));
834
}
835

    
836
av_cold int avcodec_close(AVCodecContext *avctx)
837
{
838
    /* If there is a user-supplied mutex locking routine, call it. */
839
    if (ff_lockmgr_cb) {
840
        if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
841
            return -1;
842
    }
843

    
844
    entangled_thread_counter++;
845
    if(entangled_thread_counter != 1){
846
        av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
847
        entangled_thread_counter--;
848
        return -1;
849
    }
850

    
851
    if (HAVE_THREADS && avctx->thread_opaque)
852
        ff_thread_free(avctx);
853
    if (avctx->codec && avctx->codec->close)
854
        avctx->codec->close(avctx);
855
    avcodec_default_free_buffers(avctx);
856
    avctx->coded_frame = NULL;
857
    av_freep(&avctx->priv_data);
858
    if(avctx->codec && avctx->codec->encode)
859
        av_freep(&avctx->extradata);
860
    avctx->codec = NULL;
861
    avctx->active_thread_type = 0;
862
    entangled_thread_counter--;
863

    
864
    /* Release any user-supplied mutex. */
865
    if (ff_lockmgr_cb) {
866
        (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
867
    }
868
    return 0;
869
}
870

    
871
AVCodec *avcodec_find_encoder(enum CodecID id)
872
{
873
    AVCodec *p, *experimental=NULL;
874
    p = first_avcodec;
875
    while (p) {
876
        if (p->encode != NULL && p->id == id) {
877
            if (p->capabilities & CODEC_CAP_EXPERIMENTAL && !experimental) {
878
                experimental = p;
879
            } else
880
                return p;
881
        }
882
        p = p->next;
883
    }
884
    return experimental;
885
}
886

    
887
AVCodec *avcodec_find_encoder_by_name(const char *name)
888
{
889
    AVCodec *p;
890
    if (!name)
891
        return NULL;
892
    p = first_avcodec;
893
    while (p) {
894
        if (p->encode != NULL && strcmp(name,p->name) == 0)
895
            return p;
896
        p = p->next;
897
    }
898
    return NULL;
899
}
900

    
901
AVCodec *avcodec_find_decoder(enum CodecID id)
902
{
903
    AVCodec *p;
904
    p = first_avcodec;
905
    while (p) {
906
        if (p->decode != NULL && p->id == id)
907
            return p;
908
        p = p->next;
909
    }
910
    return NULL;
911
}
912

    
913
AVCodec *avcodec_find_decoder_by_name(const char *name)
914
{
915
    AVCodec *p;
916
    if (!name)
917
        return NULL;
918
    p = first_avcodec;
919
    while (p) {
920
        if (p->decode != NULL && strcmp(name,p->name) == 0)
921
            return p;
922
        p = p->next;
923
    }
924
    return NULL;
925
}
926

    
927
static int get_bit_rate(AVCodecContext *ctx)
928
{
929
    int bit_rate;
930
    int bits_per_sample;
931

    
932
    switch(ctx->codec_type) {
933
    case AVMEDIA_TYPE_VIDEO:
934
    case AVMEDIA_TYPE_DATA:
935
    case AVMEDIA_TYPE_SUBTITLE:
936
    case AVMEDIA_TYPE_ATTACHMENT:
937
        bit_rate = ctx->bit_rate;
938
        break;
939
    case AVMEDIA_TYPE_AUDIO:
940
        bits_per_sample = av_get_bits_per_sample(ctx->codec_id);
941
        bit_rate = bits_per_sample ? ctx->sample_rate * ctx->channels * bits_per_sample : ctx->bit_rate;
942
        break;
943
    default:
944
        bit_rate = 0;
945
        break;
946
    }
947
    return bit_rate;
948
}
949

    
950
size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)
951
{
952
    int i, len, ret = 0;
953

    
954
    for (i = 0; i < 4; i++) {
955
        len = snprintf(buf, buf_size,
956
                       isprint(codec_tag&0xFF) ? "%c" : "[%d]", codec_tag&0xFF);
957
        buf      += len;
958
        buf_size  = buf_size > len ? buf_size - len : 0;
959
        ret      += len;
960
        codec_tag>>=8;
961
    }
962
    return ret;
963
}
964

    
965
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
966
{
967
    const char *codec_name;
968
    const char *profile = NULL;
969
    AVCodec *p;
970
    char buf1[32];
971
    int bitrate;
972
    AVRational display_aspect_ratio;
973

    
974
    if (encode)
975
        p = avcodec_find_encoder(enc->codec_id);
976
    else
977
        p = avcodec_find_decoder(enc->codec_id);
978

    
979
    if (p) {
980
        codec_name = p->name;
981
        profile = av_get_profile_name(p, enc->profile);
982
    } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
983
        /* fake mpeg2 transport stream codec (currently not
984
           registered) */
985
        codec_name = "mpeg2ts";
986
    } else if (enc->codec_name[0] != '\0') {
987
        codec_name = enc->codec_name;
988
    } else {
989
        /* output avi tags */
990
        char tag_buf[32];
991
        av_get_codec_tag_string(tag_buf, sizeof(tag_buf), enc->codec_tag);
992
        snprintf(buf1, sizeof(buf1), "%s / 0x%04X", tag_buf, enc->codec_tag);
993
        codec_name = buf1;
994
    }
995

    
996
    switch(enc->codec_type) {
997
    case AVMEDIA_TYPE_VIDEO:
998
        snprintf(buf, buf_size,
999
                 "Video: %s%s",
1000
                 codec_name, enc->mb_decision ? " (hq)" : "");
1001
        if (profile)
1002
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
1003
                     " (%s)", profile);
1004
        if (enc->pix_fmt != PIX_FMT_NONE) {
1005
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
1006
                     ", %s",
1007
                     avcodec_get_pix_fmt_name(enc->pix_fmt));
1008
        }
1009
        if (enc->width) {
1010
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
1011
                     ", %dx%d",
1012
                     enc->width, enc->height);
1013
            if (enc->sample_aspect_ratio.num) {
1014
                av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1015
                          enc->width*enc->sample_aspect_ratio.num,
1016
                          enc->height*enc->sample_aspect_ratio.den,
1017
                          1024*1024);
1018
                snprintf(buf + strlen(buf), buf_size - strlen(buf),
1019
                         " [PAR %d:%d DAR %d:%d]",
1020
                         enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
1021
                         display_aspect_ratio.num, display_aspect_ratio.den);
1022
            }
1023
            if(av_log_get_level() >= AV_LOG_DEBUG){
1024
                int g= av_gcd(enc->time_base.num, enc->time_base.den);
1025
                snprintf(buf + strlen(buf), buf_size - strlen(buf),
1026
                     ", %d/%d",
1027
                     enc->time_base.num/g, enc->time_base.den/g);
1028
            }
1029
        }
1030
        if (encode) {
1031
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
1032
                     ", q=%d-%d", enc->qmin, enc->qmax);
1033
        }
1034
        break;
1035
    case AVMEDIA_TYPE_AUDIO:
1036
        snprintf(buf, buf_size,
1037
                 "Audio: %s",
1038
                 codec_name);
1039
        if (profile)
1040
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
1041
                     " (%s)", profile);
1042
        if (enc->sample_rate) {
1043
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
1044
                     ", %d Hz", enc->sample_rate);
1045
        }
1046
        av_strlcat(buf, ", ", buf_size);
1047
        av_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
1048
        if (enc->sample_fmt != AV_SAMPLE_FMT_NONE) {
1049
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
1050
                     ", %s", av_get_sample_fmt_name(enc->sample_fmt));
1051
        }
1052
        break;
1053
    case AVMEDIA_TYPE_DATA:
1054
        snprintf(buf, buf_size, "Data: %s", codec_name);
1055
        break;
1056
    case AVMEDIA_TYPE_SUBTITLE:
1057
        snprintf(buf, buf_size, "Subtitle: %s", codec_name);
1058
        break;
1059
    case AVMEDIA_TYPE_ATTACHMENT:
1060
        snprintf(buf, buf_size, "Attachment: %s", codec_name);
1061
        break;
1062
    default:
1063
        snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
1064
        return;
1065
    }
1066
    if (encode) {
1067
        if (enc->flags & CODEC_FLAG_PASS1)
1068
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
1069
                     ", pass 1");
1070
        if (enc->flags & CODEC_FLAG_PASS2)
1071
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
1072
                     ", pass 2");
1073
    }
1074
    bitrate = get_bit_rate(enc);
1075
    if (bitrate != 0) {
1076
        snprintf(buf + strlen(buf), buf_size - strlen(buf),
1077
                 ", %d kb/s", bitrate / 1000);
1078
    }
1079
}
1080

    
1081
const char *av_get_profile_name(const AVCodec *codec, int profile)
1082
{
1083
    const AVProfile *p;
1084
    if (profile == FF_PROFILE_UNKNOWN || !codec->profiles)
1085
        return NULL;
1086

    
1087
    for (p = codec->profiles; p->profile != FF_PROFILE_UNKNOWN; p++)
1088
        if (p->profile == profile)
1089
            return p->name;
1090

    
1091
    return NULL;
1092
}
1093

    
1094
unsigned avcodec_version( void )
1095
{
1096
  return LIBAVCODEC_VERSION_INT;
1097
}
1098

    
1099
const char *avcodec_configuration(void)
1100
{
1101
    return FFMPEG_CONFIGURATION;
1102
}
1103

    
1104
const char *avcodec_license(void)
1105
{
1106
#define LICENSE_PREFIX "libavcodec license: "
1107
    return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
1108
}
1109

    
1110
void avcodec_init(void)
1111
{
1112
    static int initialized = 0;
1113

    
1114
    if (initialized != 0)
1115
        return;
1116
    initialized = 1;
1117

    
1118
    dsputil_static_init();
1119
}
1120

    
1121
void avcodec_flush_buffers(AVCodecContext *avctx)
1122
{
1123
    if(HAVE_PTHREADS && avctx->active_thread_type&FF_THREAD_FRAME)
1124
        ff_thread_flush(avctx);
1125
    if(avctx->codec->flush)
1126
        avctx->codec->flush(avctx);
1127
}
1128

    
1129
void avcodec_default_free_buffers(AVCodecContext *s){
1130
    int i, j;
1131

    
1132
    if(s->internal_buffer==NULL) return;
1133

    
1134
    if (s->internal_buffer_count)
1135
        av_log(s, AV_LOG_WARNING, "Found %i unreleased buffers!\n", s->internal_buffer_count);
1136
    for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
1137
        InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
1138
        for(j=0; j<4; j++){
1139
            av_freep(&buf->base[j]);
1140
            buf->data[j]= NULL;
1141
        }
1142
    }
1143
    av_freep(&s->internal_buffer);
1144

    
1145
    s->internal_buffer_count=0;
1146
}
1147

    
1148
#if FF_API_OLD_FF_PICT_TYPES
1149
char av_get_pict_type_char(int pict_type){
1150
    return av_get_picture_type_char(pict_type);
1151
}
1152
#endif
1153

    
1154
int av_get_bits_per_sample(enum CodecID codec_id){
1155
    switch(codec_id){
1156
    case CODEC_ID_ADPCM_SBPRO_2:
1157
        return 2;
1158
    case CODEC_ID_ADPCM_SBPRO_3:
1159
        return 3;
1160
    case CODEC_ID_ADPCM_SBPRO_4:
1161
    case CODEC_ID_ADPCM_CT:
1162
    case CODEC_ID_ADPCM_IMA_WAV:
1163
    case CODEC_ID_ADPCM_MS:
1164
    case CODEC_ID_ADPCM_YAMAHA:
1165
        return 4;
1166
    case CODEC_ID_ADPCM_G722:
1167
    case CODEC_ID_PCM_ALAW:
1168
    case CODEC_ID_PCM_MULAW:
1169
    case CODEC_ID_PCM_S8:
1170
    case CODEC_ID_PCM_U8:
1171
    case CODEC_ID_PCM_ZORK:
1172
        return 8;
1173
    case CODEC_ID_PCM_S16BE:
1174
    case CODEC_ID_PCM_S16LE:
1175
    case CODEC_ID_PCM_S16LE_PLANAR:
1176
    case CODEC_ID_PCM_U16BE:
1177
    case CODEC_ID_PCM_U16LE:
1178
        return 16;
1179
    case CODEC_ID_PCM_S24DAUD:
1180
    case CODEC_ID_PCM_S24BE:
1181
    case CODEC_ID_PCM_S24LE:
1182
    case CODEC_ID_PCM_U24BE:
1183
    case CODEC_ID_PCM_U24LE:
1184
        return 24;
1185
    case CODEC_ID_PCM_S32BE:
1186
    case CODEC_ID_PCM_S32LE:
1187
    case CODEC_ID_PCM_U32BE:
1188
    case CODEC_ID_PCM_U32LE:
1189
    case CODEC_ID_PCM_F32BE:
1190
    case CODEC_ID_PCM_F32LE:
1191
        return 32;
1192
    case CODEC_ID_PCM_F64BE:
1193
    case CODEC_ID_PCM_F64LE:
1194
        return 64;
1195
    default:
1196
        return 0;
1197
    }
1198
}
1199

    
1200
#if FF_API_OLD_SAMPLE_FMT
1201
int av_get_bits_per_sample_format(enum AVSampleFormat sample_fmt) {
1202
    return av_get_bits_per_sample_fmt(sample_fmt);
1203
}
1204
#endif
1205

    
1206
#if !HAVE_THREADS
1207
int ff_thread_init(AVCodecContext *s){
1208
    return -1;
1209
}
1210
#endif
1211

    
1212
unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
1213
{
1214
    unsigned int n = 0;
1215

    
1216
    while(v >= 0xff) {
1217
        *s++ = 0xff;
1218
        v -= 0xff;
1219
        n++;
1220
    }
1221
    *s = v;
1222
    n++;
1223
    return n;
1224
}
1225

    
1226
int ff_match_2uint16(const uint16_t (*tab)[2], int size, int a, int b){
1227
    int i;
1228
    for(i=0; i<size && !(tab[i][0]==a && tab[i][1]==b); i++);
1229
    return i;
1230
}
1231

    
1232
void av_log_missing_feature(void *avc, const char *feature, int want_sample)
1233
{
1234
    av_log(avc, AV_LOG_WARNING, "%s not implemented. Update your FFmpeg "
1235
            "version to the newest one from Git. If the problem still "
1236
            "occurs, it means that your file has a feature which has not "
1237
            "been implemented.\n", feature);
1238
    if(want_sample)
1239
        av_log_ask_for_sample(avc, NULL);
1240
}
1241

    
1242
void av_log_ask_for_sample(void *avc, const char *msg, ...)
1243
{
1244
    va_list argument_list;
1245

    
1246
    va_start(argument_list, msg);
1247

    
1248
    if (msg)
1249
        av_vlog(avc, AV_LOG_WARNING, msg, argument_list);
1250
    av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
1251
            "of this file to ftp://upload.ffmpeg.org/MPlayer/incoming/ "
1252
            "and contact the ffmpeg-devel mailing list.\n");
1253

    
1254
    va_end(argument_list);
1255
}
1256

    
1257
static AVHWAccel *first_hwaccel = NULL;
1258

    
1259
void av_register_hwaccel(AVHWAccel *hwaccel)
1260
{
1261
    AVHWAccel **p = &first_hwaccel;
1262
    while (*p)
1263
        p = &(*p)->next;
1264
    *p = hwaccel;
1265
    hwaccel->next = NULL;
1266
}
1267

    
1268
AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel)
1269
{
1270
    return hwaccel ? hwaccel->next : first_hwaccel;
1271
}
1272

    
1273
AVHWAccel *ff_find_hwaccel(enum CodecID codec_id, enum PixelFormat pix_fmt)
1274
{
1275
    AVHWAccel *hwaccel=NULL;
1276

    
1277
    while((hwaccel= av_hwaccel_next(hwaccel))){
1278
        if (   hwaccel->id      == codec_id
1279
            && hwaccel->pix_fmt == pix_fmt)
1280
            return hwaccel;
1281
    }
1282
    return NULL;
1283
}
1284

    
1285
int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))
1286
{
1287
    if (ff_lockmgr_cb) {
1288
        if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_DESTROY))
1289
            return -1;
1290
    }
1291

    
1292
    ff_lockmgr_cb = cb;
1293

    
1294
    if (ff_lockmgr_cb) {
1295
        if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_CREATE))
1296
            return -1;
1297
    }
1298
    return 0;
1299
}
1300

    
1301
unsigned int ff_toupper4(unsigned int x)
1302
{
1303
    return     toupper( x     &0xFF)
1304
            + (toupper((x>>8 )&0xFF)<<8 )
1305
            + (toupper((x>>16)&0xFF)<<16)
1306
            + (toupper((x>>24)&0xFF)<<24);
1307
}
1308

    
1309
#if !HAVE_PTHREADS
1310

    
1311
int ff_thread_get_buffer(AVCodecContext *avctx, AVFrame *f)
1312
{
1313
    f->owner = avctx;
1314
    return avctx->get_buffer(avctx, f);
1315
}
1316

    
1317
void ff_thread_release_buffer(AVCodecContext *avctx, AVFrame *f)
1318
{
1319
    f->owner->release_buffer(f->owner, f);
1320
}
1321

    
1322
void ff_thread_finish_setup(AVCodecContext *avctx)
1323
{
1324
}
1325

    
1326
void ff_thread_report_progress(AVFrame *f, int progress, int field)
1327
{
1328
}
1329

    
1330
void ff_thread_await_progress(AVFrame *f, int progress, int field)
1331
{
1332
}
1333

    
1334
#endif
1335

    
1336
#if FF_API_THREAD_INIT
1337
int avcodec_thread_init(AVCodecContext *s, int thread_count)
1338
{
1339
    s->thread_count = thread_count;
1340
    return ff_thread_init(s);
1341
}
1342
#endif