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ffmpeg / libavformat / utils.c @ 9100d4d6

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1
/*
2
 * various utility functions for use within FFmpeg
3
 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
4
 *
5
 * This file is part of FFmpeg.
6
 *
7
 * FFmpeg is free software; you can redistribute it and/or
8
 * modify it under the terms of the GNU Lesser General Public
9
 * License as published by the Free Software Foundation; either
10
 * version 2.1 of the License, or (at your option) any later version.
11
 *
12
 * FFmpeg is distributed in the hope that it will be useful,
13
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
 * Lesser General Public License for more details.
16
 *
17
 * You should have received a copy of the GNU Lesser General Public
18
 * License along with FFmpeg; if not, write to the Free Software
19
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20
 */
21
#include "avformat.h"
22
#include "internal.h"
23
#include "libavcodec/internal.h"
24
#include "libavutil/opt.h"
25
#include "metadata.h"
26
#include "id3v2.h"
27
#include "libavutil/avstring.h"
28
#include "riff.h"
29
#include "audiointerleave.h"
30
#include <sys/time.h>
31
#include <time.h>
32
#include <strings.h>
33
#include <stdarg.h>
34
#if CONFIG_NETWORK
35
#include "network.h"
36
#endif
37

    
38
#undef NDEBUG
39
#include <assert.h>
40

    
41
/**
42
 * @file
43
 * various utility functions for use within FFmpeg
44
 */
45

    
46
unsigned avformat_version(void)
47
{
48
    return LIBAVFORMAT_VERSION_INT;
49
}
50

    
51
const char *avformat_configuration(void)
52
{
53
    return FFMPEG_CONFIGURATION;
54
}
55

    
56
const char *avformat_license(void)
57
{
58
#define LICENSE_PREFIX "libavformat license: "
59
    return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
60
}
61

    
62
/* fraction handling */
63

    
64
/**
65
 * f = val + (num / den) + 0.5.
66
 *
67
 * 'num' is normalized so that it is such as 0 <= num < den.
68
 *
69
 * @param f fractional number
70
 * @param val integer value
71
 * @param num must be >= 0
72
 * @param den must be >= 1
73
 */
74
static void av_frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den)
75
{
76
    num += (den >> 1);
77
    if (num >= den) {
78
        val += num / den;
79
        num = num % den;
80
    }
81
    f->val = val;
82
    f->num = num;
83
    f->den = den;
84
}
85

    
86
/**
87
 * Fractional addition to f: f = f + (incr / f->den).
88
 *
89
 * @param f fractional number
90
 * @param incr increment, can be positive or negative
91
 */
92
static void av_frac_add(AVFrac *f, int64_t incr)
93
{
94
    int64_t num, den;
95

    
96
    num = f->num + incr;
97
    den = f->den;
98
    if (num < 0) {
99
        f->val += num / den;
100
        num = num % den;
101
        if (num < 0) {
102
            num += den;
103
            f->val--;
104
        }
105
    } else if (num >= den) {
106
        f->val += num / den;
107
        num = num % den;
108
    }
109
    f->num = num;
110
}
111

    
112
/** head of registered input format linked list */
113
#if !FF_API_FIRST_FORMAT
114
static
115
#endif
116
AVInputFormat *first_iformat = NULL;
117
/** head of registered output format linked list */
118
#if !FF_API_FIRST_FORMAT
119
static
120
#endif
121
AVOutputFormat *first_oformat = NULL;
122

    
123
AVInputFormat  *av_iformat_next(AVInputFormat  *f)
124
{
125
    if(f) return f->next;
126
    else  return first_iformat;
127
}
128

    
129
AVOutputFormat *av_oformat_next(AVOutputFormat *f)
130
{
131
    if(f) return f->next;
132
    else  return first_oformat;
133
}
134

    
135
void av_register_input_format(AVInputFormat *format)
136
{
137
    AVInputFormat **p;
138
    p = &first_iformat;
139
    while (*p != NULL) p = &(*p)->next;
140
    *p = format;
141
    format->next = NULL;
142
}
143

    
144
void av_register_output_format(AVOutputFormat *format)
145
{
146
    AVOutputFormat **p;
147
    p = &first_oformat;
148
    while (*p != NULL) p = &(*p)->next;
149
    *p = format;
150
    format->next = NULL;
151
}
152

    
153
int av_match_ext(const char *filename, const char *extensions)
154
{
155
    const char *ext, *p;
156
    char ext1[32], *q;
157

    
158
    if(!filename)
159
        return 0;
160

    
161
    ext = strrchr(filename, '.');
162
    if (ext) {
163
        ext++;
164
        p = extensions;
165
        for(;;) {
166
            q = ext1;
167
            while (*p != '\0' && *p != ',' && q-ext1<sizeof(ext1)-1)
168
                *q++ = *p++;
169
            *q = '\0';
170
            if (!strcasecmp(ext1, ext))
171
                return 1;
172
            if (*p == '\0')
173
                break;
174
            p++;
175
        }
176
    }
177
    return 0;
178
}
179

    
180
static int match_format(const char *name, const char *names)
181
{
182
    const char *p;
183
    int len, namelen;
184

    
185
    if (!name || !names)
186
        return 0;
187

    
188
    namelen = strlen(name);
189
    while ((p = strchr(names, ','))) {
190
        len = FFMAX(p - names, namelen);
191
        if (!strncasecmp(name, names, len))
192
            return 1;
193
        names = p+1;
194
    }
195
    return !strcasecmp(name, names);
196
}
197

    
198
#if FF_API_GUESS_FORMAT
199
AVOutputFormat *guess_format(const char *short_name, const char *filename,
200
                             const char *mime_type)
201
{
202
    return av_guess_format(short_name, filename, mime_type);
203
}
204
#endif
205

    
206
AVOutputFormat *av_guess_format(const char *short_name, const char *filename,
207
                                const char *mime_type)
208
{
209
    AVOutputFormat *fmt = NULL, *fmt_found;
210
    int score_max, score;
211

    
212
    /* specific test for image sequences */
213
#if CONFIG_IMAGE2_MUXER
214
    if (!short_name && filename &&
215
        av_filename_number_test(filename) &&
216
        av_guess_image2_codec(filename) != CODEC_ID_NONE) {
217
        return av_guess_format("image2", NULL, NULL);
218
    }
219
#endif
220
    /* Find the proper file type. */
221
    fmt_found = NULL;
222
    score_max = 0;
223
    while ((fmt = av_oformat_next(fmt))) {
224
        score = 0;
225
        if (fmt->name && short_name && !strcmp(fmt->name, short_name))
226
            score += 100;
227
        if (fmt->mime_type && mime_type && !strcmp(fmt->mime_type, mime_type))
228
            score += 10;
229
        if (filename && fmt->extensions &&
230
            av_match_ext(filename, fmt->extensions)) {
231
            score += 5;
232
        }
233
        if (score > score_max) {
234
            score_max = score;
235
            fmt_found = fmt;
236
        }
237
    }
238
    return fmt_found;
239
}
240

    
241
#if FF_API_GUESS_FORMAT
242
AVOutputFormat *guess_stream_format(const char *short_name, const char *filename,
243
                             const char *mime_type)
244
{
245
    AVOutputFormat *fmt = av_guess_format(short_name, filename, mime_type);
246

    
247
    if (fmt) {
248
        AVOutputFormat *stream_fmt;
249
        char stream_format_name[64];
250

    
251
        snprintf(stream_format_name, sizeof(stream_format_name), "%s_stream", fmt->name);
252
        stream_fmt = av_guess_format(stream_format_name, NULL, NULL);
253

    
254
        if (stream_fmt)
255
            fmt = stream_fmt;
256
    }
257

    
258
    return fmt;
259
}
260
#endif
261

    
262
enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
263
                            const char *filename, const char *mime_type, enum AVMediaType type){
264
    if(type == AVMEDIA_TYPE_VIDEO){
265
        enum CodecID codec_id= CODEC_ID_NONE;
266

    
267
#if CONFIG_IMAGE2_MUXER
268
        if(!strcmp(fmt->name, "image2") || !strcmp(fmt->name, "image2pipe")){
269
            codec_id= av_guess_image2_codec(filename);
270
        }
271
#endif
272
        if(codec_id == CODEC_ID_NONE)
273
            codec_id= fmt->video_codec;
274
        return codec_id;
275
    }else if(type == AVMEDIA_TYPE_AUDIO)
276
        return fmt->audio_codec;
277
    else if (type == AVMEDIA_TYPE_SUBTITLE)
278
        return fmt->subtitle_codec;
279
    else
280
        return CODEC_ID_NONE;
281
}
282

    
283
AVInputFormat *av_find_input_format(const char *short_name)
284
{
285
    AVInputFormat *fmt = NULL;
286
    while ((fmt = av_iformat_next(fmt))) {
287
        if (match_format(short_name, fmt->name))
288
            return fmt;
289
    }
290
    return NULL;
291
}
292

    
293
#if FF_API_SYMVER && CONFIG_SHARED && HAVE_SYMVER
294
FF_SYMVER(void, av_destruct_packet_nofree, (AVPacket *pkt), "LIBAVFORMAT_52")
295
{
296
    av_destruct_packet_nofree(pkt);
297
}
298

    
299
FF_SYMVER(void, av_destruct_packet, (AVPacket *pkt), "LIBAVFORMAT_52")
300
{
301
    av_destruct_packet(pkt);
302
}
303

    
304
FF_SYMVER(int, av_new_packet, (AVPacket *pkt, int size), "LIBAVFORMAT_52")
305
{
306
    return av_new_packet(pkt, size);
307
}
308

    
309
FF_SYMVER(int, av_dup_packet, (AVPacket *pkt), "LIBAVFORMAT_52")
310
{
311
    return av_dup_packet(pkt);
312
}
313

    
314
FF_SYMVER(void, av_free_packet, (AVPacket *pkt), "LIBAVFORMAT_52")
315
{
316
    av_free_packet(pkt);
317
}
318

    
319
FF_SYMVER(void, av_init_packet, (AVPacket *pkt), "LIBAVFORMAT_52")
320
{
321
    av_log(NULL, AV_LOG_WARNING, "Diverting av_*_packet function calls to libavcodec. Recompile to improve performance\n");
322
    av_init_packet(pkt);
323
}
324
#endif
325

    
326
int av_get_packet(ByteIOContext *s, AVPacket *pkt, int size)
327
{
328
    int ret= av_new_packet(pkt, size);
329

    
330
    if(ret<0)
331
        return ret;
332

    
333
    pkt->pos= url_ftell(s);
334

    
335
    ret= get_buffer(s, pkt->data, size);
336
    if(ret<=0)
337
        av_free_packet(pkt);
338
    else
339
        av_shrink_packet(pkt, ret);
340

    
341
    return ret;
342
}
343

    
344
int av_append_packet(ByteIOContext *s, AVPacket *pkt, int size)
345
{
346
    int ret;
347
    int old_size;
348
    if (!pkt->size)
349
        return av_get_packet(s, pkt, size);
350
    old_size = pkt->size;
351
    ret = av_grow_packet(pkt, size);
352
    if (ret < 0)
353
        return ret;
354
    ret = get_buffer(s, pkt->data + old_size, size);
355
    av_shrink_packet(pkt, old_size + FFMAX(ret, 0));
356
    return ret;
357
}
358

    
359

    
360
int av_filename_number_test(const char *filename)
361
{
362
    char buf[1024];
363
    return filename && (av_get_frame_filename(buf, sizeof(buf), filename, 1)>=0);
364
}
365

    
366
AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max)
367
{
368
    AVProbeData lpd = *pd;
369
    AVInputFormat *fmt1 = NULL, *fmt;
370
    int score;
371

    
372
    if (lpd.buf_size > 10 && ff_id3v2_match(lpd.buf, ID3v2_DEFAULT_MAGIC)) {
373
        int id3len = ff_id3v2_tag_len(lpd.buf);
374
        if (lpd.buf_size > id3len + 16) {
375
            lpd.buf += id3len;
376
            lpd.buf_size -= id3len;
377
        }
378
    }
379

    
380
    fmt = NULL;
381
    while ((fmt1 = av_iformat_next(fmt1))) {
382
        if (!is_opened == !(fmt1->flags & AVFMT_NOFILE))
383
            continue;
384
        score = 0;
385
        if (fmt1->read_probe) {
386
            score = fmt1->read_probe(&lpd);
387
        } else if (fmt1->extensions) {
388
            if (av_match_ext(lpd.filename, fmt1->extensions)) {
389
                score = 50;
390
            }
391
        }
392
        if (score > *score_max) {
393
            *score_max = score;
394
            fmt = fmt1;
395
        }else if (score == *score_max)
396
            fmt = NULL;
397
    }
398
    return fmt;
399
}
400

    
401
AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened){
402
    int score=0;
403
    return av_probe_input_format2(pd, is_opened, &score);
404
}
405

    
406
static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st, AVProbeData *pd, int score)
407
{
408
    static const struct {
409
        const char *name; enum CodecID id; enum AVMediaType type;
410
    } fmt_id_type[] = {
411
        { "aac"      , CODEC_ID_AAC       , AVMEDIA_TYPE_AUDIO },
412
        { "ac3"      , CODEC_ID_AC3       , AVMEDIA_TYPE_AUDIO },
413
        { "dts"      , CODEC_ID_DTS       , AVMEDIA_TYPE_AUDIO },
414
        { "eac3"     , CODEC_ID_EAC3      , AVMEDIA_TYPE_AUDIO },
415
        { "h264"     , CODEC_ID_H264      , AVMEDIA_TYPE_VIDEO },
416
        { "m4v"      , CODEC_ID_MPEG4     , AVMEDIA_TYPE_VIDEO },
417
        { "mp3"      , CODEC_ID_MP3       , AVMEDIA_TYPE_AUDIO },
418
        { "mpegvideo", CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO },
419
        { 0 }
420
    };
421
    AVInputFormat *fmt = av_probe_input_format2(pd, 1, &score);
422

    
423
    if (fmt) {
424
        int i;
425
        av_log(s, AV_LOG_DEBUG, "Probe with size=%d, packets=%d detected %s with score=%d\n",
426
               pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets, fmt->name, score);
427
        for (i = 0; fmt_id_type[i].name; i++) {
428
            if (!strcmp(fmt->name, fmt_id_type[i].name)) {
429
                st->codec->codec_id   = fmt_id_type[i].id;
430
                st->codec->codec_type = fmt_id_type[i].type;
431
                break;
432
            }
433
        }
434
    }
435
    return !!fmt;
436
}
437

    
438
/************************************************************/
439
/* input media file */
440

    
441
/**
442
 * Open a media file from an IO stream. 'fmt' must be specified.
443
 */
444
int av_open_input_stream(AVFormatContext **ic_ptr,
445
                         ByteIOContext *pb, const char *filename,
446
                         AVInputFormat *fmt, AVFormatParameters *ap)
447
{
448
    int err;
449
    AVFormatContext *ic;
450
    AVFormatParameters default_ap;
451

    
452
    if(!ap){
453
        ap=&default_ap;
454
        memset(ap, 0, sizeof(default_ap));
455
    }
456

    
457
    if(!ap->prealloced_context)
458
        ic = avformat_alloc_context();
459
    else
460
        ic = *ic_ptr;
461
    if (!ic) {
462
        err = AVERROR(ENOMEM);
463
        goto fail;
464
    }
465
    ic->iformat = fmt;
466
    ic->pb = pb;
467
    ic->duration = AV_NOPTS_VALUE;
468
    ic->start_time = AV_NOPTS_VALUE;
469
    av_strlcpy(ic->filename, filename, sizeof(ic->filename));
470

    
471
    /* allocate private data */
472
    if (fmt->priv_data_size > 0) {
473
        ic->priv_data = av_mallocz(fmt->priv_data_size);
474
        if (!ic->priv_data) {
475
            err = AVERROR(ENOMEM);
476
            goto fail;
477
        }
478
    } else {
479
        ic->priv_data = NULL;
480
    }
481

    
482
    // e.g. AVFMT_NOFILE formats will not have a ByteIOContext
483
    if (ic->pb)
484
        ff_id3v2_read(ic, ID3v2_DEFAULT_MAGIC);
485

    
486
    if (ic->iformat->read_header) {
487
        err = ic->iformat->read_header(ic, ap);
488
        if (err < 0)
489
            goto fail;
490
    }
491

    
492
    if (pb && !ic->data_offset)
493
        ic->data_offset = url_ftell(ic->pb);
494

    
495
#if FF_API_OLD_METADATA
496
    ff_metadata_demux_compat(ic);
497
#endif
498

    
499
    ic->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
500

    
501
    *ic_ptr = ic;
502
    return 0;
503
 fail:
504
    if (ic) {
505
        int i;
506
        av_freep(&ic->priv_data);
507
        for(i=0;i<ic->nb_streams;i++) {
508
            AVStream *st = ic->streams[i];
509
            if (st) {
510
                av_free(st->priv_data);
511
                av_free(st->codec->extradata);
512
                av_free(st->codec);
513
                av_free(st->info);
514
            }
515
            av_free(st);
516
        }
517
    }
518
    av_free(ic);
519
    *ic_ptr = NULL;
520
    return err;
521
}
522

    
523
/** size of probe buffer, for guessing file type from file contents */
524
#define PROBE_BUF_MIN 2048
525
#define PROBE_BUF_MAX (1<<20)
526

    
527
int ff_probe_input_buffer(ByteIOContext **pb, AVInputFormat **fmt,
528
                          const char *filename, void *logctx,
529
                          unsigned int offset, unsigned int max_probe_size)
530
{
531
    AVProbeData pd = { filename ? filename : "", NULL, -offset };
532
    unsigned char *buf = NULL;
533
    int ret = 0, probe_size;
534

    
535
    if (!max_probe_size) {
536
        max_probe_size = PROBE_BUF_MAX;
537
    } else if (max_probe_size > PROBE_BUF_MAX) {
538
        max_probe_size = PROBE_BUF_MAX;
539
    } else if (max_probe_size < PROBE_BUF_MIN) {
540
        return AVERROR(EINVAL);
541
    }
542

    
543
    if (offset >= max_probe_size) {
544
        return AVERROR(EINVAL);
545
    }
546

    
547
    for(probe_size= PROBE_BUF_MIN; probe_size<=max_probe_size && !*fmt && ret >= 0;
548
        probe_size = FFMIN(probe_size<<1, FFMAX(max_probe_size, probe_size+1))) {
549
        int ret, score = probe_size < max_probe_size ? AVPROBE_SCORE_MAX/4 : 0;
550
        int buf_offset = (probe_size == PROBE_BUF_MIN) ? 0 : probe_size>>1;
551

    
552
        if (probe_size < offset) {
553
            continue;
554
        }
555

    
556
        /* read probe data */
557
        buf = av_realloc(buf, probe_size + AVPROBE_PADDING_SIZE);
558
        if ((ret = get_buffer(*pb, buf + buf_offset, probe_size - buf_offset)) < 0) {
559
            /* fail if error was not end of file, otherwise, lower score */
560
            if (ret != AVERROR_EOF) {
561
                av_free(buf);
562
                return ret;
563
            }
564
            score = 0;
565
            ret = 0;            /* error was end of file, nothing read */
566
        }
567
        pd.buf_size += ret;
568
        pd.buf = &buf[offset];
569

    
570
        memset(pd.buf + pd.buf_size, 0, AVPROBE_PADDING_SIZE);
571

    
572
        /* guess file format */
573
        *fmt = av_probe_input_format2(&pd, 1, &score);
574
        if(*fmt){
575
            if(score <= AVPROBE_SCORE_MAX/4){ //this can only be true in the last iteration
576
                av_log(logctx, AV_LOG_WARNING, "Format detected only with low score of %d, misdetection possible!\n", score);
577
            }else
578
                av_log(logctx, AV_LOG_DEBUG, "Probed with size=%d and score=%d\n", probe_size, score);
579
        }
580
    }
581

    
582
    if (!*fmt) {
583
        av_free(buf);
584
        return AVERROR_INVALIDDATA;
585
    }
586

    
587
    /* rewind. reuse probe buffer to avoid seeking */
588
    if ((ret = ff_rewind_with_probe_data(*pb, buf, pd.buf_size)) < 0)
589
        av_free(buf);
590

    
591
    return ret;
592
}
593

    
594
int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
595
                       AVInputFormat *fmt,
596
                       int buf_size,
597
                       AVFormatParameters *ap)
598
{
599
    int err;
600
    AVProbeData probe_data, *pd = &probe_data;
601
    ByteIOContext *pb = NULL;
602
    void *logctx= ap && ap->prealloced_context ? *ic_ptr : NULL;
603

    
604
    pd->filename = "";
605
    if (filename)
606
        pd->filename = filename;
607
    pd->buf = NULL;
608
    pd->buf_size = 0;
609

    
610
    if (!fmt) {
611
        /* guess format if no file can be opened */
612
        fmt = av_probe_input_format(pd, 0);
613
    }
614

    
615
    /* Do not open file if the format does not need it. XXX: specific
616
       hack needed to handle RTSP/TCP */
617
    if (!fmt || !(fmt->flags & AVFMT_NOFILE)) {
618
        /* if no file needed do not try to open one */
619
        if ((err=url_fopen(&pb, filename, URL_RDONLY)) < 0) {
620
            goto fail;
621
        }
622
        if (buf_size > 0) {
623
            url_setbufsize(pb, buf_size);
624
        }
625
        if (!fmt && (err = ff_probe_input_buffer(&pb, &fmt, filename, logctx, 0, logctx ? (*ic_ptr)->probesize : 0)) < 0) {
626
            goto fail;
627
        }
628
    }
629

    
630
    /* if still no format found, error */
631
    if (!fmt) {
632
        err = AVERROR_INVALIDDATA;
633
        goto fail;
634
    }
635

    
636
    /* check filename in case an image number is expected */
637
    if (fmt->flags & AVFMT_NEEDNUMBER) {
638
        if (!av_filename_number_test(filename)) {
639
            err = AVERROR_NUMEXPECTED;
640
            goto fail;
641
        }
642
    }
643
    err = av_open_input_stream(ic_ptr, pb, filename, fmt, ap);
644
    if (err)
645
        goto fail;
646
    return 0;
647
 fail:
648
    av_freep(&pd->buf);
649
    if (pb)
650
        url_fclose(pb);
651
    if (ap && ap->prealloced_context)
652
        av_free(*ic_ptr);
653
    *ic_ptr = NULL;
654
    return err;
655

    
656
}
657

    
658
/*******************************************************/
659

    
660
static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
661
                               AVPacketList **plast_pktl){
662
    AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
663
    if (!pktl)
664
        return NULL;
665

    
666
    if (*packet_buffer)
667
        (*plast_pktl)->next = pktl;
668
    else
669
        *packet_buffer = pktl;
670

    
671
    /* add the packet in the buffered packet list */
672
    *plast_pktl = pktl;
673
    pktl->pkt= *pkt;
674
    return &pktl->pkt;
675
}
676

    
677
int av_read_packet(AVFormatContext *s, AVPacket *pkt)
678
{
679
    int ret, i;
680
    AVStream *st;
681

    
682
    for(;;){
683
        AVPacketList *pktl = s->raw_packet_buffer;
684

    
685
        if (pktl) {
686
            *pkt = pktl->pkt;
687
            if(s->streams[pkt->stream_index]->codec->codec_id != CODEC_ID_PROBE ||
688
               !s->streams[pkt->stream_index]->probe_packets ||
689
               s->raw_packet_buffer_remaining_size < pkt->size){
690
                AVProbeData *pd = &s->streams[pkt->stream_index]->probe_data;
691
                av_freep(&pd->buf);
692
                pd->buf_size = 0;
693
                s->raw_packet_buffer = pktl->next;
694
                s->raw_packet_buffer_remaining_size += pkt->size;
695
                av_free(pktl);
696
                return 0;
697
            }
698
        }
699

    
700
        av_init_packet(pkt);
701
        ret= s->iformat->read_packet(s, pkt);
702
        if (ret < 0) {
703
            if (!pktl || ret == AVERROR(EAGAIN))
704
                return ret;
705
            for (i = 0; i < s->nb_streams; i++)
706
                s->streams[i]->probe_packets = 0;
707
            continue;
708
        }
709
        st= s->streams[pkt->stream_index];
710

    
711
        switch(st->codec->codec_type){
712
        case AVMEDIA_TYPE_VIDEO:
713
            if(s->video_codec_id)   st->codec->codec_id= s->video_codec_id;
714
            break;
715
        case AVMEDIA_TYPE_AUDIO:
716
            if(s->audio_codec_id)   st->codec->codec_id= s->audio_codec_id;
717
            break;
718
        case AVMEDIA_TYPE_SUBTITLE:
719
            if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id;
720
            break;
721
        }
722

    
723
        if(!pktl && (st->codec->codec_id != CODEC_ID_PROBE ||
724
                     !st->probe_packets))
725
            return ret;
726

    
727
        add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end);
728
        s->raw_packet_buffer_remaining_size -= pkt->size;
729

    
730
        if(st->codec->codec_id == CODEC_ID_PROBE){
731
            AVProbeData *pd = &st->probe_data;
732
            av_log(s, AV_LOG_DEBUG, "probing stream %d\n", st->index);
733
            --st->probe_packets;
734

    
735
            pd->buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
736
            memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size);
737
            pd->buf_size += pkt->size;
738
            memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
739

    
740
            if(av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){
741
                //FIXME we dont reduce score to 0 for the case of running out of buffer space in bytes
742
                set_codec_from_probe_data(s, st, pd, st->probe_packets > 0 ? AVPROBE_SCORE_MAX/4 : 0);
743
                if(st->codec->codec_id != CODEC_ID_PROBE){
744
                    pd->buf_size=0;
745
                    av_freep(&pd->buf);
746
                    av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
747
                }
748
            }
749
        }
750
    }
751
}
752

    
753
/**********************************************************/
754

    
755
/**
756
 * Get the number of samples of an audio frame. Return -1 on error.
757
 */
758
static int get_audio_frame_size(AVCodecContext *enc, int size)
759
{
760
    int frame_size;
761

    
762
    if(enc->codec_id == CODEC_ID_VORBIS)
763
        return -1;
764

    
765
    if (enc->frame_size <= 1) {
766
        int bits_per_sample = av_get_bits_per_sample(enc->codec_id);
767

    
768
        if (bits_per_sample) {
769
            if (enc->channels == 0)
770
                return -1;
771
            frame_size = (size << 3) / (bits_per_sample * enc->channels);
772
        } else {
773
            /* used for example by ADPCM codecs */
774
            if (enc->bit_rate == 0)
775
                return -1;
776
            frame_size = ((int64_t)size * 8 * enc->sample_rate) / enc->bit_rate;
777
        }
778
    } else {
779
        frame_size = enc->frame_size;
780
    }
781
    return frame_size;
782
}
783

    
784

    
785
/**
786
 * Return the frame duration in seconds. Return 0 if not available.
787
 */
788
static void compute_frame_duration(int *pnum, int *pden, AVStream *st,
789
                                   AVCodecParserContext *pc, AVPacket *pkt)
790
{
791
    int frame_size;
792

    
793
    *pnum = 0;
794
    *pden = 0;
795
    switch(st->codec->codec_type) {
796
    case AVMEDIA_TYPE_VIDEO:
797
        if(st->time_base.num*1000LL > st->time_base.den){
798
            *pnum = st->time_base.num;
799
            *pden = st->time_base.den;
800
        }else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){
801
            *pnum = st->codec->time_base.num;
802
            *pden = st->codec->time_base.den;
803
            if (pc && pc->repeat_pict) {
804
                *pnum = (*pnum) * (1 + pc->repeat_pict);
805
            }
806
            //If this codec can be interlaced or progressive then we need a parser to compute duration of a packet
807
            //Thus if we have no parser in such case leave duration undefined.
808
            if(st->codec->ticks_per_frame>1 && !pc){
809
                *pnum = *pden = 0;
810
            }
811
        }
812
        break;
813
    case AVMEDIA_TYPE_AUDIO:
814
        frame_size = get_audio_frame_size(st->codec, pkt->size);
815
        if (frame_size < 0)
816
            break;
817
        *pnum = frame_size;
818
        *pden = st->codec->sample_rate;
819
        break;
820
    default:
821
        break;
822
    }
823
}
824

    
825
static int is_intra_only(AVCodecContext *enc){
826
    if(enc->codec_type == AVMEDIA_TYPE_AUDIO){
827
        return 1;
828
    }else if(enc->codec_type == AVMEDIA_TYPE_VIDEO){
829
        switch(enc->codec_id){
830
        case CODEC_ID_MJPEG:
831
        case CODEC_ID_MJPEGB:
832
        case CODEC_ID_LJPEG:
833
        case CODEC_ID_RAWVIDEO:
834
        case CODEC_ID_DVVIDEO:
835
        case CODEC_ID_HUFFYUV:
836
        case CODEC_ID_FFVHUFF:
837
        case CODEC_ID_ASV1:
838
        case CODEC_ID_ASV2:
839
        case CODEC_ID_VCR1:
840
        case CODEC_ID_DNXHD:
841
        case CODEC_ID_JPEG2000:
842
            return 1;
843
        default: break;
844
        }
845
    }
846
    return 0;
847
}
848

    
849
static void update_initial_timestamps(AVFormatContext *s, int stream_index,
850
                                      int64_t dts, int64_t pts)
851
{
852
    AVStream *st= s->streams[stream_index];
853
    AVPacketList *pktl= s->packet_buffer;
854

    
855
    if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE)
856
        return;
857

    
858
    st->first_dts= dts - st->cur_dts;
859
    st->cur_dts= dts;
860

    
861
    for(; pktl; pktl= pktl->next){
862
        if(pktl->pkt.stream_index != stream_index)
863
            continue;
864
        //FIXME think more about this check
865
        if(pktl->pkt.pts != AV_NOPTS_VALUE && pktl->pkt.pts == pktl->pkt.dts)
866
            pktl->pkt.pts += st->first_dts;
867

    
868
        if(pktl->pkt.dts != AV_NOPTS_VALUE)
869
            pktl->pkt.dts += st->first_dts;
870

    
871
        if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
872
            st->start_time= pktl->pkt.pts;
873
    }
874
    if (st->start_time == AV_NOPTS_VALUE)
875
        st->start_time = pts;
876
}
877

    
878
static void update_initial_durations(AVFormatContext *s, AVStream *st, AVPacket *pkt)
879
{
880
    AVPacketList *pktl= s->packet_buffer;
881
    int64_t cur_dts= 0;
882

    
883
    if(st->first_dts != AV_NOPTS_VALUE){
884
        cur_dts= st->first_dts;
885
        for(; pktl; pktl= pktl->next){
886
            if(pktl->pkt.stream_index == pkt->stream_index){
887
                if(pktl->pkt.pts != pktl->pkt.dts || pktl->pkt.dts != AV_NOPTS_VALUE || pktl->pkt.duration)
888
                    break;
889
                cur_dts -= pkt->duration;
890
            }
891
        }
892
        pktl= s->packet_buffer;
893
        st->first_dts = cur_dts;
894
    }else if(st->cur_dts)
895
        return;
896

    
897
    for(; pktl; pktl= pktl->next){
898
        if(pktl->pkt.stream_index != pkt->stream_index)
899
            continue;
900
        if(pktl->pkt.pts == pktl->pkt.dts && pktl->pkt.dts == AV_NOPTS_VALUE
901
           && !pktl->pkt.duration){
902
            pktl->pkt.dts= cur_dts;
903
            if(!st->codec->has_b_frames)
904
                pktl->pkt.pts= cur_dts;
905
            cur_dts += pkt->duration;
906
            pktl->pkt.duration= pkt->duration;
907
        }else
908
            break;
909
    }
910
    if(st->first_dts == AV_NOPTS_VALUE)
911
        st->cur_dts= cur_dts;
912
}
913

    
914
static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
915
                               AVCodecParserContext *pc, AVPacket *pkt)
916
{
917
    int num, den, presentation_delayed, delay, i;
918
    int64_t offset;
919

    
920
    if (s->flags & AVFMT_FLAG_NOFILLIN)
921
        return;
922

    
923
    if((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
924
        pkt->dts= AV_NOPTS_VALUE;
925

    
926
    if (st->codec->codec_id != CODEC_ID_H264 && pc && pc->pict_type == FF_B_TYPE)
927
        //FIXME Set low_delay = 0 when has_b_frames = 1
928
        st->codec->has_b_frames = 1;
929

    
930
    /* do we have a video B-frame ? */
931
    delay= st->codec->has_b_frames;
932
    presentation_delayed = 0;
933
    /* XXX: need has_b_frame, but cannot get it if the codec is
934
        not initialized */
935
    if (delay &&
936
        pc && pc->pict_type != FF_B_TYPE)
937
        presentation_delayed = 1;
938

    
939
    if(pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && pkt->dts > pkt->pts && st->pts_wrap_bits<63
940
       /*&& pkt->dts-(1LL<<st->pts_wrap_bits) < pkt->pts*/){
941
        pkt->dts -= 1LL<<st->pts_wrap_bits;
942
    }
943

    
944
    // some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg)
945
    // we take the conservative approach and discard both
946
    // Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly.
947
    if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){
948
        av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination\n");
949
        pkt->dts= pkt->pts= AV_NOPTS_VALUE;
950
    }
951

    
952
    if (pkt->duration == 0) {
953
        compute_frame_duration(&num, &den, st, pc, pkt);
954
        if (den && num) {
955
            pkt->duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num, AV_ROUND_DOWN);
956

    
957
            if(pkt->duration != 0 && s->packet_buffer)
958
                update_initial_durations(s, st, pkt);
959
        }
960
    }
961

    
962
    /* correct timestamps with byte offset if demuxers only have timestamps
963
       on packet boundaries */
964
    if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){
965
        /* this will estimate bitrate based on this frame's duration and size */
966
        offset = av_rescale(pc->offset, pkt->duration, pkt->size);
967
        if(pkt->pts != AV_NOPTS_VALUE)
968
            pkt->pts += offset;
969
        if(pkt->dts != AV_NOPTS_VALUE)
970
            pkt->dts += offset;
971
    }
972

    
973
    if (pc && pc->dts_sync_point >= 0) {
974
        // we have synchronization info from the parser
975
        int64_t den = st->codec->time_base.den * (int64_t) st->time_base.num;
976
        if (den > 0) {
977
            int64_t num = st->codec->time_base.num * (int64_t) st->time_base.den;
978
            if (pkt->dts != AV_NOPTS_VALUE) {
979
                // got DTS from the stream, update reference timestamp
980
                st->reference_dts = pkt->dts - pc->dts_ref_dts_delta * num / den;
981
                pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
982
            } else if (st->reference_dts != AV_NOPTS_VALUE) {
983
                // compute DTS based on reference timestamp
984
                pkt->dts = st->reference_dts + pc->dts_ref_dts_delta * num / den;
985
                pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
986
            }
987
            if (pc->dts_sync_point > 0)
988
                st->reference_dts = pkt->dts; // new reference
989
        }
990
    }
991

    
992
    /* This may be redundant, but it should not hurt. */
993
    if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
994
        presentation_delayed = 1;
995

    
996
//    av_log(NULL, AV_LOG_DEBUG, "IN delayed:%d pts:%"PRId64", dts:%"PRId64" cur_dts:%"PRId64" st:%d pc:%p\n", presentation_delayed, pkt->pts, pkt->dts, st->cur_dts, pkt->stream_index, pc);
997
    /* interpolate PTS and DTS if they are not present */
998
    //We skip H264 currently because delay and has_b_frames are not reliably set
999
    if((delay==0 || (delay==1 && pc)) && st->codec->codec_id != CODEC_ID_H264){
1000
        if (presentation_delayed) {
1001
            /* DTS = decompression timestamp */
1002
            /* PTS = presentation timestamp */
1003
            if (pkt->dts == AV_NOPTS_VALUE)
1004
                pkt->dts = st->last_IP_pts;
1005
            update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts);
1006
            if (pkt->dts == AV_NOPTS_VALUE)
1007
                pkt->dts = st->cur_dts;
1008

    
1009
            /* this is tricky: the dts must be incremented by the duration
1010
            of the frame we are displaying, i.e. the last I- or P-frame */
1011
            if (st->last_IP_duration == 0)
1012
                st->last_IP_duration = pkt->duration;
1013
            if(pkt->dts != AV_NOPTS_VALUE)
1014
                st->cur_dts = pkt->dts + st->last_IP_duration;
1015
            st->last_IP_duration  = pkt->duration;
1016
            st->last_IP_pts= pkt->pts;
1017
            /* cannot compute PTS if not present (we can compute it only
1018
            by knowing the future */
1019
        } else if(pkt->pts != AV_NOPTS_VALUE || pkt->dts != AV_NOPTS_VALUE || pkt->duration){
1020
            if(pkt->pts != AV_NOPTS_VALUE && pkt->duration){
1021
                int64_t old_diff= FFABS(st->cur_dts - pkt->duration - pkt->pts);
1022
                int64_t new_diff= FFABS(st->cur_dts - pkt->pts);
1023
                if(old_diff < new_diff && old_diff < (pkt->duration>>3)){
1024
                    pkt->pts += pkt->duration;
1025
    //                av_log(NULL, AV_LOG_DEBUG, "id:%d old:%"PRId64" new:%"PRId64" dur:%d cur:%"PRId64" size:%d\n", pkt->stream_index, old_diff, new_diff, pkt->duration, st->cur_dts, pkt->size);
1026
                }
1027
            }
1028

    
1029
            /* presentation is not delayed : PTS and DTS are the same */
1030
            if(pkt->pts == AV_NOPTS_VALUE)
1031
                pkt->pts = pkt->dts;
1032
            update_initial_timestamps(s, pkt->stream_index, pkt->pts, pkt->pts);
1033
            if(pkt->pts == AV_NOPTS_VALUE)
1034
                pkt->pts = st->cur_dts;
1035
            pkt->dts = pkt->pts;
1036
            if(pkt->pts != AV_NOPTS_VALUE)
1037
                st->cur_dts = pkt->pts + pkt->duration;
1038
        }
1039
    }
1040

    
1041
    if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
1042
        st->pts_buffer[0]= pkt->pts;
1043
        for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
1044
            FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
1045
        if(pkt->dts == AV_NOPTS_VALUE)
1046
            pkt->dts= st->pts_buffer[0];
1047
        if(st->codec->codec_id == CODEC_ID_H264){ //we skiped it above so we try here
1048
            update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); // this should happen on the first packet
1049
        }
1050
        if(pkt->dts > st->cur_dts)
1051
            st->cur_dts = pkt->dts;
1052
    }
1053

    
1054
//    av_log(NULL, AV_LOG_ERROR, "OUTdelayed:%d/%d pts:%"PRId64", dts:%"PRId64" cur_dts:%"PRId64"\n", presentation_delayed, delay, pkt->pts, pkt->dts, st->cur_dts);
1055

    
1056
    /* update flags */
1057
    if(is_intra_only(st->codec))
1058
        pkt->flags |= AV_PKT_FLAG_KEY;
1059
    else if (pc) {
1060
        pkt->flags = 0;
1061
        /* keyframe computation */
1062
        if (pc->key_frame == 1)
1063
            pkt->flags |= AV_PKT_FLAG_KEY;
1064
        else if (pc->key_frame == -1 && pc->pict_type == FF_I_TYPE)
1065
            pkt->flags |= AV_PKT_FLAG_KEY;
1066
    }
1067
    if (pc)
1068
        pkt->convergence_duration = pc->convergence_duration;
1069
}
1070

    
1071

    
1072
static int av_read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1073
{
1074
    AVStream *st;
1075
    int len, ret, i;
1076

    
1077
    av_init_packet(pkt);
1078

    
1079
    for(;;) {
1080
        /* select current input stream component */
1081
        st = s->cur_st;
1082
        if (st) {
1083
            if (!st->need_parsing || !st->parser) {
1084
                /* no parsing needed: we just output the packet as is */
1085
                /* raw data support */
1086
                *pkt = st->cur_pkt; st->cur_pkt.data= NULL;
1087
                compute_pkt_fields(s, st, NULL, pkt);
1088
                s->cur_st = NULL;
1089
                if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1090
                    (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1091
                    ff_reduce_index(s, st->index);
1092
                    av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1093
                }
1094
                break;
1095
            } else if (st->cur_len > 0 && st->discard < AVDISCARD_ALL) {
1096
                len = av_parser_parse2(st->parser, st->codec, &pkt->data, &pkt->size,
1097
                                       st->cur_ptr, st->cur_len,
1098
                                       st->cur_pkt.pts, st->cur_pkt.dts,
1099
                                       st->cur_pkt.pos);
1100
                st->cur_pkt.pts = AV_NOPTS_VALUE;
1101
                st->cur_pkt.dts = AV_NOPTS_VALUE;
1102
                /* increment read pointer */
1103
                st->cur_ptr += len;
1104
                st->cur_len -= len;
1105

    
1106
                /* return packet if any */
1107
                if (pkt->size) {
1108
                got_packet:
1109
                    pkt->duration = 0;
1110
                    pkt->stream_index = st->index;
1111
                    pkt->pts = st->parser->pts;
1112
                    pkt->dts = st->parser->dts;
1113
                    pkt->pos = st->parser->pos;
1114
                    if(pkt->data == st->cur_pkt.data && pkt->size == st->cur_pkt.size){
1115
                        s->cur_st = NULL;
1116
                        pkt->destruct= st->cur_pkt.destruct;
1117
                        st->cur_pkt.destruct= NULL;
1118
                        st->cur_pkt.data    = NULL;
1119
                        assert(st->cur_len == 0);
1120
                    }else{
1121
                    pkt->destruct = NULL;
1122
                    }
1123
                    compute_pkt_fields(s, st, st->parser, pkt);
1124

    
1125
                    if((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY){
1126
                        ff_reduce_index(s, st->index);
1127
                        av_add_index_entry(st, st->parser->frame_offset, pkt->dts,
1128
                                           0, 0, AVINDEX_KEYFRAME);
1129
                    }
1130

    
1131
                    break;
1132
                }
1133
            } else {
1134
                /* free packet */
1135
                av_free_packet(&st->cur_pkt);
1136
                s->cur_st = NULL;
1137
            }
1138
        } else {
1139
            AVPacket cur_pkt;
1140
            /* read next packet */
1141
            ret = av_read_packet(s, &cur_pkt);
1142
            if (ret < 0) {
1143
                if (ret == AVERROR(EAGAIN))
1144
                    return ret;
1145
                /* return the last frames, if any */
1146
                for(i = 0; i < s->nb_streams; i++) {
1147
                    st = s->streams[i];
1148
                    if (st->parser && st->need_parsing) {
1149
                        av_parser_parse2(st->parser, st->codec,
1150
                                        &pkt->data, &pkt->size,
1151
                                        NULL, 0,
1152
                                        AV_NOPTS_VALUE, AV_NOPTS_VALUE,
1153
                                        AV_NOPTS_VALUE);
1154
                        if (pkt->size)
1155
                            goto got_packet;
1156
                    }
1157
                }
1158
                /* no more packets: really terminate parsing */
1159
                return ret;
1160
            }
1161
            st = s->streams[cur_pkt.stream_index];
1162
            st->cur_pkt= cur_pkt;
1163

    
1164
            if(st->cur_pkt.pts != AV_NOPTS_VALUE &&
1165
               st->cur_pkt.dts != AV_NOPTS_VALUE &&
1166
               st->cur_pkt.pts < st->cur_pkt.dts){
1167
                av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d\n",
1168
                    st->cur_pkt.stream_index,
1169
                    st->cur_pkt.pts,
1170
                    st->cur_pkt.dts,
1171
                    st->cur_pkt.size);
1172
//                av_free_packet(&st->cur_pkt);
1173
//                return -1;
1174
            }
1175

    
1176
            if(s->debug & FF_FDEBUG_TS)
1177
                av_log(s, AV_LOG_DEBUG, "av_read_packet stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n",
1178
                    st->cur_pkt.stream_index,
1179
                    st->cur_pkt.pts,
1180
                    st->cur_pkt.dts,
1181
                    st->cur_pkt.size,
1182
                    st->cur_pkt.duration,
1183
                    st->cur_pkt.flags);
1184

    
1185
            s->cur_st = st;
1186
            st->cur_ptr = st->cur_pkt.data;
1187
            st->cur_len = st->cur_pkt.size;
1188
            if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1189
                st->parser = av_parser_init(st->codec->codec_id);
1190
                if (!st->parser) {
1191
                    /* no parser available: just output the raw packets */
1192
                    st->need_parsing = AVSTREAM_PARSE_NONE;
1193
                }else if(st->need_parsing == AVSTREAM_PARSE_HEADERS){
1194
                    st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1195
                }else if(st->need_parsing == AVSTREAM_PARSE_FULL_ONCE){
1196
                    st->parser->flags |= PARSER_FLAG_ONCE;
1197
                }
1198
            }
1199
        }
1200
    }
1201
    if(s->debug & FF_FDEBUG_TS)
1202
        av_log(s, AV_LOG_DEBUG, "av_read_frame_internal stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n",
1203
            pkt->stream_index,
1204
            pkt->pts,
1205
            pkt->dts,
1206
            pkt->size,
1207
            pkt->duration,
1208
            pkt->flags);
1209

    
1210
    return 0;
1211
}
1212

    
1213
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1214
{
1215
    AVPacketList *pktl;
1216
    int eof=0;
1217
    const int genpts= s->flags & AVFMT_FLAG_GENPTS;
1218

    
1219
    for(;;){
1220
        pktl = s->packet_buffer;
1221
        if (pktl) {
1222
            AVPacket *next_pkt= &pktl->pkt;
1223

    
1224
            if(genpts && next_pkt->dts != AV_NOPTS_VALUE){
1225
                int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1226
                while(pktl && next_pkt->pts == AV_NOPTS_VALUE){
1227
                    if(   pktl->pkt.stream_index == next_pkt->stream_index
1228
                       && (0 > av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)))
1229
                       && av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) { //not b frame
1230
                        next_pkt->pts= pktl->pkt.dts;
1231
                    }
1232
                    pktl= pktl->next;
1233
                }
1234
                pktl = s->packet_buffer;
1235
            }
1236

    
1237
            if(   next_pkt->pts != AV_NOPTS_VALUE
1238
               || next_pkt->dts == AV_NOPTS_VALUE
1239
               || !genpts || eof){
1240
                /* read packet from packet buffer, if there is data */
1241
                *pkt = *next_pkt;
1242
                s->packet_buffer = pktl->next;
1243
                av_free(pktl);
1244
                return 0;
1245
            }
1246
        }
1247
        if(genpts){
1248
            int ret= av_read_frame_internal(s, pkt);
1249
            if(ret<0){
1250
                if(pktl && ret != AVERROR(EAGAIN)){
1251
                    eof=1;
1252
                    continue;
1253
                }else
1254
                    return ret;
1255
            }
1256

    
1257
            if(av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
1258
                                           &s->packet_buffer_end)) < 0)
1259
                return AVERROR(ENOMEM);
1260
        }else{
1261
            assert(!s->packet_buffer);
1262
            return av_read_frame_internal(s, pkt);
1263
        }
1264
    }
1265
}
1266

    
1267
/* XXX: suppress the packet queue */
1268
static void flush_packet_queue(AVFormatContext *s)
1269
{
1270
    AVPacketList *pktl;
1271

    
1272
    for(;;) {
1273
        pktl = s->packet_buffer;
1274
        if (!pktl)
1275
            break;
1276
        s->packet_buffer = pktl->next;
1277
        av_free_packet(&pktl->pkt);
1278
        av_free(pktl);
1279
    }
1280
    while(s->raw_packet_buffer){
1281
        pktl = s->raw_packet_buffer;
1282
        s->raw_packet_buffer = pktl->next;
1283
        av_free_packet(&pktl->pkt);
1284
        av_free(pktl);
1285
    }
1286
    s->packet_buffer_end=
1287
    s->raw_packet_buffer_end= NULL;
1288
    s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1289
}
1290

    
1291
/*******************************************************/
1292
/* seek support */
1293

    
1294
int av_find_default_stream_index(AVFormatContext *s)
1295
{
1296
    int first_audio_index = -1;
1297
    int i;
1298
    AVStream *st;
1299

    
1300
    if (s->nb_streams <= 0)
1301
        return -1;
1302
    for(i = 0; i < s->nb_streams; i++) {
1303
        st = s->streams[i];
1304
        if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1305
            return i;
1306
        }
1307
        if (first_audio_index < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1308
            first_audio_index = i;
1309
    }
1310
    return first_audio_index >= 0 ? first_audio_index : 0;
1311
}
1312

    
1313
/**
1314
 * Flush the frame reader.
1315
 */
1316
void ff_read_frame_flush(AVFormatContext *s)
1317
{
1318
    AVStream *st;
1319
    int i, j;
1320

    
1321
    flush_packet_queue(s);
1322

    
1323
    s->cur_st = NULL;
1324

    
1325
    /* for each stream, reset read state */
1326
    for(i = 0; i < s->nb_streams; i++) {
1327
        st = s->streams[i];
1328

    
1329
        if (st->parser) {
1330
            av_parser_close(st->parser);
1331
            st->parser = NULL;
1332
            av_free_packet(&st->cur_pkt);
1333
        }
1334
        st->last_IP_pts = AV_NOPTS_VALUE;
1335
        st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
1336
        st->reference_dts = AV_NOPTS_VALUE;
1337
        /* fail safe */
1338
        st->cur_ptr = NULL;
1339
        st->cur_len = 0;
1340

    
1341
        st->probe_packets = MAX_PROBE_PACKETS;
1342

    
1343
        for(j=0; j<MAX_REORDER_DELAY+1; j++)
1344
            st->pts_buffer[j]= AV_NOPTS_VALUE;
1345
    }
1346
}
1347

    
1348
void av_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp){
1349
    int i;
1350

    
1351
    for(i = 0; i < s->nb_streams; i++) {
1352
        AVStream *st = s->streams[i];
1353

    
1354
        st->cur_dts = av_rescale(timestamp,
1355
                                 st->time_base.den * (int64_t)ref_st->time_base.num,
1356
                                 st->time_base.num * (int64_t)ref_st->time_base.den);
1357
    }
1358
}
1359

    
1360
void ff_reduce_index(AVFormatContext *s, int stream_index)
1361
{
1362
    AVStream *st= s->streams[stream_index];
1363
    unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry);
1364

    
1365
    if((unsigned)st->nb_index_entries >= max_entries){
1366
        int i;
1367
        for(i=0; 2*i<st->nb_index_entries; i++)
1368
            st->index_entries[i]= st->index_entries[2*i];
1369
        st->nb_index_entries= i;
1370
    }
1371
}
1372

    
1373
int av_add_index_entry(AVStream *st,
1374
                            int64_t pos, int64_t timestamp, int size, int distance, int flags)
1375
{
1376
    AVIndexEntry *entries, *ie;
1377
    int index;
1378

    
1379
    if((unsigned)st->nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1380
        return -1;
1381

    
1382
    entries = av_fast_realloc(st->index_entries,
1383
                              &st->index_entries_allocated_size,
1384
                              (st->nb_index_entries + 1) *
1385
                              sizeof(AVIndexEntry));
1386
    if(!entries)
1387
        return -1;
1388

    
1389
    st->index_entries= entries;
1390

    
1391
    index= av_index_search_timestamp(st, timestamp, AVSEEK_FLAG_ANY);
1392

    
1393
    if(index<0){
1394
        index= st->nb_index_entries++;
1395
        ie= &entries[index];
1396
        assert(index==0 || ie[-1].timestamp < timestamp);
1397
    }else{
1398
        ie= &entries[index];
1399
        if(ie->timestamp != timestamp){
1400
            if(ie->timestamp <= timestamp)
1401
                return -1;
1402
            memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(st->nb_index_entries - index));
1403
            st->nb_index_entries++;
1404
        }else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance
1405
            distance= ie->min_distance;
1406
    }
1407

    
1408
    ie->pos = pos;
1409
    ie->timestamp = timestamp;
1410
    ie->min_distance= distance;
1411
    ie->size= size;
1412
    ie->flags = flags;
1413

    
1414
    return index;
1415
}
1416

    
1417
int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
1418
                              int flags)
1419
{
1420
    AVIndexEntry *entries= st->index_entries;
1421
    int nb_entries= st->nb_index_entries;
1422
    int a, b, m;
1423
    int64_t timestamp;
1424

    
1425
    a = - 1;
1426
    b = nb_entries;
1427

    
1428
    //optimize appending index entries at the end
1429
    if(b && entries[b-1].timestamp < wanted_timestamp)
1430
        a= b-1;
1431

    
1432
    while (b - a > 1) {
1433
        m = (a + b) >> 1;
1434
        timestamp = entries[m].timestamp;
1435
        if(timestamp >= wanted_timestamp)
1436
            b = m;
1437
        if(timestamp <= wanted_timestamp)
1438
            a = m;
1439
    }
1440
    m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1441

    
1442
    if(!(flags & AVSEEK_FLAG_ANY)){
1443
        while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){
1444
            m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1445
        }
1446
    }
1447

    
1448
    if(m == nb_entries)
1449
        return -1;
1450
    return  m;
1451
}
1452

    
1453
#define DEBUG_SEEK
1454

    
1455
int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags){
1456
    AVInputFormat *avif= s->iformat;
1457
    int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
1458
    int64_t ts_min, ts_max, ts;
1459
    int index;
1460
    int64_t ret;
1461
    AVStream *st;
1462

    
1463
    if (stream_index < 0)
1464
        return -1;
1465

    
1466
#ifdef DEBUG_SEEK
1467
    av_log(s, AV_LOG_DEBUG, "read_seek: %d %"PRId64"\n", stream_index, target_ts);
1468
#endif
1469

    
1470
    ts_max=
1471
    ts_min= AV_NOPTS_VALUE;
1472
    pos_limit= -1; //gcc falsely says it may be uninitialized
1473

    
1474
    st= s->streams[stream_index];
1475
    if(st->index_entries){
1476
        AVIndexEntry *e;
1477

    
1478
        index= av_index_search_timestamp(st, target_ts, flags | AVSEEK_FLAG_BACKWARD); //FIXME whole func must be checked for non-keyframe entries in index case, especially read_timestamp()
1479
        index= FFMAX(index, 0);
1480
        e= &st->index_entries[index];
1481

    
1482
        if(e->timestamp <= target_ts || e->pos == e->min_distance){
1483
            pos_min= e->pos;
1484
            ts_min= e->timestamp;
1485
#ifdef DEBUG_SEEK
1486
            av_log(s, AV_LOG_DEBUG, "using cached pos_min=0x%"PRIx64" dts_min=%"PRId64"\n",
1487
                   pos_min,ts_min);
1488
#endif
1489
        }else{
1490
            assert(index==0);
1491
        }
1492

    
1493
        index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD);
1494
        assert(index < st->nb_index_entries);
1495
        if(index >= 0){
1496
            e= &st->index_entries[index];
1497
            assert(e->timestamp >= target_ts);
1498
            pos_max= e->pos;
1499
            ts_max= e->timestamp;
1500
            pos_limit= pos_max - e->min_distance;
1501
#ifdef DEBUG_SEEK
1502
            av_log(s, AV_LOG_DEBUG, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%"PRId64"\n",
1503
                   pos_max,pos_limit, ts_max);
1504
#endif
1505
        }
1506
    }
1507

    
1508
    pos= av_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp);
1509
    if(pos<0)
1510
        return -1;
1511

    
1512
    /* do the seek */
1513
    if ((ret = url_fseek(s->pb, pos, SEEK_SET)) < 0)
1514
        return ret;
1515

    
1516
    av_update_cur_dts(s, st, ts);
1517

    
1518
    return 0;
1519
}
1520

    
1521
int64_t av_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts, int64_t pos_min, int64_t pos_max, int64_t pos_limit, int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret, int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t )){
1522
    int64_t pos, ts;
1523
    int64_t start_pos, filesize;
1524
    int no_change;
1525

    
1526
#ifdef DEBUG_SEEK
1527
    av_log(s, AV_LOG_DEBUG, "gen_seek: %d %"PRId64"\n", stream_index, target_ts);
1528
#endif
1529

    
1530
    if(ts_min == AV_NOPTS_VALUE){
1531
        pos_min = s->data_offset;
1532
        ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1533
        if (ts_min == AV_NOPTS_VALUE)
1534
            return -1;
1535
    }
1536

    
1537
    if(ts_max == AV_NOPTS_VALUE){
1538
        int step= 1024;
1539
        filesize = url_fsize(s->pb);
1540
        pos_max = filesize - 1;
1541
        do{
1542
            pos_max -= step;
1543
            ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step);
1544
            step += step;
1545
        }while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
1546
        if (ts_max == AV_NOPTS_VALUE)
1547
            return -1;
1548

    
1549
        for(;;){
1550
            int64_t tmp_pos= pos_max + 1;
1551
            int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX);
1552
            if(tmp_ts == AV_NOPTS_VALUE)
1553
                break;
1554
            ts_max= tmp_ts;
1555
            pos_max= tmp_pos;
1556
            if(tmp_pos >= filesize)
1557
                break;
1558
        }
1559
        pos_limit= pos_max;
1560
    }
1561

    
1562
    if(ts_min > ts_max){
1563
        return -1;
1564
    }else if(ts_min == ts_max){
1565
        pos_limit= pos_min;
1566
    }
1567

    
1568
    no_change=0;
1569
    while (pos_min < pos_limit) {
1570
#ifdef DEBUG_SEEK
1571
        av_log(s, AV_LOG_DEBUG, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%"PRId64" dts_max=%"PRId64"\n",
1572
               pos_min, pos_max,
1573
               ts_min, ts_max);
1574
#endif
1575
        assert(pos_limit <= pos_max);
1576

    
1577
        if(no_change==0){
1578
            int64_t approximate_keyframe_distance= pos_max - pos_limit;
1579
            // interpolate position (better than dichotomy)
1580
            pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min)
1581
                + pos_min - approximate_keyframe_distance;
1582
        }else if(no_change==1){
1583
            // bisection, if interpolation failed to change min or max pos last time
1584
            pos = (pos_min + pos_limit)>>1;
1585
        }else{
1586
            /* linear search if bisection failed, can only happen if there
1587
               are very few or no keyframes between min/max */
1588
            pos=pos_min;
1589
        }
1590
        if(pos <= pos_min)
1591
            pos= pos_min + 1;
1592
        else if(pos > pos_limit)
1593
            pos= pos_limit;
1594
        start_pos= pos;
1595

    
1596
        ts = read_timestamp(s, stream_index, &pos, INT64_MAX); //may pass pos_limit instead of -1
1597
        if(pos == pos_max)
1598
            no_change++;
1599
        else
1600
            no_change=0;
1601
#ifdef DEBUG_SEEK
1602
        av_log(s, AV_LOG_DEBUG, "%"PRId64" %"PRId64" %"PRId64" / %"PRId64" %"PRId64" %"PRId64" target:%"PRId64" limit:%"PRId64" start:%"PRId64" noc:%d\n",
1603
               pos_min, pos, pos_max, ts_min, ts, ts_max, target_ts, pos_limit,
1604
               start_pos, no_change);
1605
#endif
1606
        if(ts == AV_NOPTS_VALUE){
1607
            av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
1608
            return -1;
1609
        }
1610
        assert(ts != AV_NOPTS_VALUE);
1611
        if (target_ts <= ts) {
1612
            pos_limit = start_pos - 1;
1613
            pos_max = pos;
1614
            ts_max = ts;
1615
        }
1616
        if (target_ts >= ts) {
1617
            pos_min = pos;
1618
            ts_min = ts;
1619
        }
1620
    }
1621

    
1622
    pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1623
    ts  = (flags & AVSEEK_FLAG_BACKWARD) ?  ts_min :  ts_max;
1624
#ifdef DEBUG_SEEK
1625
    pos_min = pos;
1626
    ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1627
    pos_min++;
1628
    ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1629
    av_log(s, AV_LOG_DEBUG, "pos=0x%"PRIx64" %"PRId64"<=%"PRId64"<=%"PRId64"\n",
1630
           pos, ts_min, target_ts, ts_max);
1631
#endif
1632
    *ts_ret= ts;
1633
    return pos;
1634
}
1635

    
1636
static int av_seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
1637
    int64_t pos_min, pos_max;
1638
#if 0
1639
    AVStream *st;
1640

1641
    if (stream_index < 0)
1642
        return -1;
1643

1644
    st= s->streams[stream_index];
1645
#endif
1646

    
1647
    pos_min = s->data_offset;
1648
    pos_max = url_fsize(s->pb) - 1;
1649

    
1650
    if     (pos < pos_min) pos= pos_min;
1651
    else if(pos > pos_max) pos= pos_max;
1652

    
1653
    url_fseek(s->pb, pos, SEEK_SET);
1654

    
1655
#if 0
1656
    av_update_cur_dts(s, st, ts);
1657
#endif
1658
    return 0;
1659
}
1660

    
1661
static int av_seek_frame_generic(AVFormatContext *s,
1662
                                 int stream_index, int64_t timestamp, int flags)
1663
{
1664
    int index;
1665
    int64_t ret;
1666
    AVStream *st;
1667
    AVIndexEntry *ie;
1668

    
1669
    st = s->streams[stream_index];
1670

    
1671
    index = av_index_search_timestamp(st, timestamp, flags);
1672

    
1673
    if(index < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
1674
        return -1;
1675

    
1676
    if(index < 0 || index==st->nb_index_entries-1){
1677
        int i;
1678
        AVPacket pkt;
1679

    
1680
        if(st->nb_index_entries){
1681
            assert(st->index_entries);
1682
            ie= &st->index_entries[st->nb_index_entries-1];
1683
            if ((ret = url_fseek(s->pb, ie->pos, SEEK_SET)) < 0)
1684
                return ret;
1685
            av_update_cur_dts(s, st, ie->timestamp);
1686
        }else{
1687
            if ((ret = url_fseek(s->pb, s->data_offset, SEEK_SET)) < 0)
1688
                return ret;
1689
        }
1690
        for(i=0;; i++) {
1691
            int ret;
1692
            do{
1693
                ret = av_read_frame(s, &pkt);
1694
            }while(ret == AVERROR(EAGAIN));
1695
            if(ret<0)
1696
                break;
1697
            av_free_packet(&pkt);
1698
            if(stream_index == pkt.stream_index){
1699
                if((pkt.flags & AV_PKT_FLAG_KEY) && pkt.dts > timestamp)
1700
                    break;
1701
            }
1702
        }
1703
        index = av_index_search_timestamp(st, timestamp, flags);
1704
    }
1705
    if (index < 0)
1706
        return -1;
1707

    
1708
    ff_read_frame_flush(s);
1709
    if (s->iformat->read_seek){
1710
        if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
1711
            return 0;
1712
    }
1713
    ie = &st->index_entries[index];
1714
    if ((ret = url_fseek(s->pb, ie->pos, SEEK_SET)) < 0)
1715
        return ret;
1716
    av_update_cur_dts(s, st, ie->timestamp);
1717

    
1718
    return 0;
1719
}
1720

    
1721
int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
1722
{
1723
    int ret;
1724
    AVStream *st;
1725

    
1726
    ff_read_frame_flush(s);
1727

    
1728
    if(flags & AVSEEK_FLAG_BYTE)
1729
        return av_seek_frame_byte(s, stream_index, timestamp, flags);
1730

    
1731
    if(stream_index < 0){
1732
        stream_index= av_find_default_stream_index(s);
1733
        if(stream_index < 0)
1734
            return -1;
1735

    
1736
        st= s->streams[stream_index];
1737
       /* timestamp for default must be expressed in AV_TIME_BASE units */
1738
        timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
1739
    }
1740

    
1741
    /* first, we try the format specific seek */
1742
    if (s->iformat->read_seek)
1743
        ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
1744
    else
1745
        ret = -1;
1746
    if (ret >= 0) {
1747
        return 0;
1748
    }
1749

    
1750
    if(s->iformat->read_timestamp)
1751
        return av_seek_frame_binary(s, stream_index, timestamp, flags);
1752
    else
1753
        return av_seek_frame_generic(s, stream_index, timestamp, flags);
1754
}
1755

    
1756
int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
1757
{
1758
    if(min_ts > ts || max_ts < ts)
1759
        return -1;
1760

    
1761
    ff_read_frame_flush(s);
1762

    
1763
    if (s->iformat->read_seek2)
1764
        return s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags);
1765

    
1766
    if(s->iformat->read_timestamp){
1767
        //try to seek via read_timestamp()
1768
    }
1769

    
1770
    //Fallback to old API if new is not implemented but old is
1771
    //Note the old has somewat different sematics
1772
    if(s->iformat->read_seek || 1)
1773
        return av_seek_frame(s, stream_index, ts, flags | (ts - min_ts > (uint64_t)(max_ts - ts) ? AVSEEK_FLAG_BACKWARD : 0));
1774

    
1775
    // try some generic seek like av_seek_frame_generic() but with new ts semantics
1776
}
1777

    
1778
/*******************************************************/
1779

    
1780
/**
1781
 * Return TRUE if the stream has accurate duration in any stream.
1782
 *
1783
 * @return TRUE if the stream has accurate duration for at least one component.
1784
 */
1785
static int av_has_duration(AVFormatContext *ic)
1786
{
1787
    int i;
1788
    AVStream *st;
1789

    
1790
    for(i = 0;i < ic->nb_streams; i++) {
1791
        st = ic->streams[i];
1792
        if (st->duration != AV_NOPTS_VALUE)
1793
            return 1;
1794
    }
1795
    return 0;
1796
}
1797

    
1798
/**
1799
 * Estimate the stream timings from the one of each components.
1800
 *
1801
 * Also computes the global bitrate if possible.
1802
 */
1803
static void av_update_stream_timings(AVFormatContext *ic)
1804
{
1805
    int64_t start_time, start_time1, end_time, end_time1;
1806
    int64_t duration, duration1;
1807
    int i;
1808
    AVStream *st;
1809

    
1810
    start_time = INT64_MAX;
1811
    end_time = INT64_MIN;
1812
    duration = INT64_MIN;
1813
    for(i = 0;i < ic->nb_streams; i++) {
1814
        st = ic->streams[i];
1815
        if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
1816
            start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
1817
            if (start_time1 < start_time)
1818
                start_time = start_time1;
1819
            if (st->duration != AV_NOPTS_VALUE) {
1820
                end_time1 = start_time1
1821
                          + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1822
                if (end_time1 > end_time)
1823
                    end_time = end_time1;
1824
            }
1825
        }
1826
        if (st->duration != AV_NOPTS_VALUE) {
1827
            duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1828
            if (duration1 > duration)
1829
                duration = duration1;
1830
        }
1831
    }
1832
    if (start_time != INT64_MAX) {
1833
        ic->start_time = start_time;
1834
        if (end_time != INT64_MIN) {
1835
            if (end_time - start_time > duration)
1836
                duration = end_time - start_time;
1837
        }
1838
    }
1839
    if (duration != INT64_MIN) {
1840
        ic->duration = duration;
1841
        if (ic->file_size > 0) {
1842
            /* compute the bitrate */
1843
            ic->bit_rate = (double)ic->file_size * 8.0 * AV_TIME_BASE /
1844
                (double)ic->duration;
1845
        }
1846
    }
1847
}
1848

    
1849
static void fill_all_stream_timings(AVFormatContext *ic)
1850
{
1851
    int i;
1852
    AVStream *st;
1853

    
1854
    av_update_stream_timings(ic);
1855
    for(i = 0;i < ic->nb_streams; i++) {
1856
        st = ic->streams[i];
1857
        if (st->start_time == AV_NOPTS_VALUE) {
1858
            if(ic->start_time != AV_NOPTS_VALUE)
1859
                st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
1860
            if(ic->duration != AV_NOPTS_VALUE)
1861
                st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
1862
        }
1863
    }
1864
}
1865

    
1866
static void av_estimate_timings_from_bit_rate(AVFormatContext *ic)
1867
{
1868
    int64_t filesize, duration;
1869
    int bit_rate, i;
1870
    AVStream *st;
1871

    
1872
    /* if bit_rate is already set, we believe it */
1873
    if (ic->bit_rate <= 0) {
1874
        bit_rate = 0;
1875
        for(i=0;i<ic->nb_streams;i++) {
1876
            st = ic->streams[i];
1877
            if (st->codec->bit_rate > 0)
1878
            bit_rate += st->codec->bit_rate;
1879
        }
1880
        ic->bit_rate = bit_rate;
1881
    }
1882

    
1883
    /* if duration is already set, we believe it */
1884
    if (ic->duration == AV_NOPTS_VALUE &&
1885
        ic->bit_rate != 0 &&
1886
        ic->file_size != 0)  {
1887
        filesize = ic->file_size;
1888
        if (filesize > 0) {
1889
            for(i = 0; i < ic->nb_streams; i++) {
1890
                st = ic->streams[i];
1891
                duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
1892
                if (st->duration == AV_NOPTS_VALUE)
1893
                    st->duration = duration;
1894
            }
1895
        }
1896
    }
1897
}
1898

    
1899
#define DURATION_MAX_READ_SIZE 250000
1900
#define DURATION_MAX_RETRY 3
1901

    
1902
/* only usable for MPEG-PS streams */
1903
static void av_estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
1904
{
1905
    AVPacket pkt1, *pkt = &pkt1;
1906
    AVStream *st;
1907
    int read_size, i, ret;
1908
    int64_t end_time;
1909
    int64_t filesize, offset, duration;
1910
    int retry=0;
1911

    
1912
    ic->cur_st = NULL;
1913

    
1914
    /* flush packet queue */
1915
    flush_packet_queue(ic);
1916

    
1917
    for (i=0; i<ic->nb_streams; i++) {
1918
        st = ic->streams[i];
1919
        if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE)
1920
            av_log(st->codec, AV_LOG_WARNING, "start time is not set in av_estimate_timings_from_pts\n");
1921

    
1922
        if (st->parser) {
1923
            av_parser_close(st->parser);
1924
            st->parser= NULL;
1925
            av_free_packet(&st->cur_pkt);
1926
        }
1927
    }
1928

    
1929
    /* estimate the end time (duration) */
1930
    /* XXX: may need to support wrapping */
1931
    filesize = ic->file_size;
1932
    end_time = AV_NOPTS_VALUE;
1933
    do{
1934
    offset = filesize - (DURATION_MAX_READ_SIZE<<retry);
1935
    if (offset < 0)
1936
        offset = 0;
1937

    
1938
    url_fseek(ic->pb, offset, SEEK_SET);
1939
    read_size = 0;
1940
    for(;;) {
1941
        if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0)))
1942
            break;
1943

    
1944
        do{
1945
            ret = av_read_packet(ic, pkt);
1946
        }while(ret == AVERROR(EAGAIN));
1947
        if (ret != 0)
1948
            break;
1949
        read_size += pkt->size;
1950
        st = ic->streams[pkt->stream_index];
1951
        if (pkt->pts != AV_NOPTS_VALUE &&
1952
            (st->start_time != AV_NOPTS_VALUE ||
1953
             st->first_dts  != AV_NOPTS_VALUE)) {
1954
            duration = end_time = pkt->pts;
1955
            if (st->start_time != AV_NOPTS_VALUE)  duration -= st->start_time;
1956
            else                                   duration -= st->first_dts;
1957
            if (duration < 0)
1958
                duration += 1LL<<st->pts_wrap_bits;
1959
            if (duration > 0) {
1960
                if (st->duration == AV_NOPTS_VALUE ||
1961
                    st->duration < duration)
1962
                    st->duration = duration;
1963
            }
1964
        }
1965
        av_free_packet(pkt);
1966
    }
1967
    }while(   end_time==AV_NOPTS_VALUE
1968
           && filesize > (DURATION_MAX_READ_SIZE<<retry)
1969
           && ++retry <= DURATION_MAX_RETRY);
1970

    
1971
    fill_all_stream_timings(ic);
1972

    
1973
    url_fseek(ic->pb, old_offset, SEEK_SET);
1974
    for (i=0; i<ic->nb_streams; i++) {
1975
        st= ic->streams[i];
1976
        st->cur_dts= st->first_dts;
1977
        st->last_IP_pts = AV_NOPTS_VALUE;
1978
    }
1979
}
1980

    
1981
static void av_estimate_timings(AVFormatContext *ic, int64_t old_offset)
1982
{
1983
    int64_t file_size;
1984

    
1985
    /* get the file size, if possible */
1986
    if (ic->iformat->flags & AVFMT_NOFILE) {
1987
        file_size = 0;
1988
    } else {
1989
        file_size = url_fsize(ic->pb);
1990
        if (file_size < 0)
1991
            file_size = 0;
1992
    }
1993
    ic->file_size = file_size;
1994

    
1995
    if ((!strcmp(ic->iformat->name, "mpeg") ||
1996
         !strcmp(ic->iformat->name, "mpegts")) &&
1997
        file_size && !url_is_streamed(ic->pb)) {
1998
        /* get accurate estimate from the PTSes */
1999
        av_estimate_timings_from_pts(ic, old_offset);
2000
    } else if (av_has_duration(ic)) {
2001
        /* at least one component has timings - we use them for all
2002
           the components */
2003
        fill_all_stream_timings(ic);
2004
    } else {
2005
        av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n");
2006
        /* less precise: use bitrate info */
2007
        av_estimate_timings_from_bit_rate(ic);
2008
    }
2009
    av_update_stream_timings(ic);
2010

    
2011
#if 0
2012
    {
2013
        int i;
2014
        AVStream *st;
2015
        for(i = 0;i < ic->nb_streams; i++) {
2016
            st = ic->streams[i];
2017
        printf("%d: start_time: %0.3f duration: %0.3f\n",
2018
               i, (double)st->start_time / AV_TIME_BASE,
2019
               (double)st->duration / AV_TIME_BASE);
2020
        }
2021
        printf("stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
2022
               (double)ic->start_time / AV_TIME_BASE,
2023
               (double)ic->duration / AV_TIME_BASE,
2024
               ic->bit_rate / 1000);
2025
    }
2026
#endif
2027
}
2028

    
2029
static int has_codec_parameters(AVCodecContext *enc)
2030
{
2031
    int val;
2032
    switch(enc->codec_type) {
2033
    case AVMEDIA_TYPE_AUDIO:
2034
        val = enc->sample_rate && enc->channels && enc->sample_fmt != AV_SAMPLE_FMT_NONE;
2035
        if(!enc->frame_size &&
2036
           (enc->codec_id == CODEC_ID_VORBIS ||
2037
            enc->codec_id == CODEC_ID_AAC ||
2038
            enc->codec_id == CODEC_ID_MP1 ||
2039
            enc->codec_id == CODEC_ID_MP2 ||
2040
            enc->codec_id == CODEC_ID_MP3 ||
2041
            enc->codec_id == CODEC_ID_SPEEX))
2042
            return 0;
2043
        break;
2044
    case AVMEDIA_TYPE_VIDEO:
2045
        val = enc->width && enc->pix_fmt != PIX_FMT_NONE;
2046
        break;
2047
    default:
2048
        val = 1;
2049
        break;
2050
    }
2051
    return enc->codec_id != CODEC_ID_NONE && val != 0;
2052
}
2053

    
2054
static int has_decode_delay_been_guessed(AVStream *st)
2055
{
2056
    return st->codec->codec_id != CODEC_ID_H264 ||
2057
        st->codec_info_nb_frames >= 6 + st->codec->has_b_frames;
2058
}
2059

    
2060
static int try_decode_frame(AVStream *st, AVPacket *avpkt)
2061
{
2062
    int16_t *samples;
2063
    AVCodec *codec;
2064
    int got_picture, data_size, ret=0;
2065
    AVFrame picture;
2066

    
2067
    if(!st->codec->codec){
2068
        codec = avcodec_find_decoder(st->codec->codec_id);
2069
        if (!codec)
2070
            return -1;
2071
        ret = avcodec_open(st->codec, codec);
2072
        if (ret < 0)
2073
            return ret;
2074
    }
2075

    
2076
    if(!has_codec_parameters(st->codec) || !has_decode_delay_been_guessed(st)){
2077
        switch(st->codec->codec_type) {
2078
        case AVMEDIA_TYPE_VIDEO:
2079
            avcodec_get_frame_defaults(&picture);
2080
            ret = avcodec_decode_video2(st->codec, &picture,
2081
                                        &got_picture, avpkt);
2082
            break;
2083
        case AVMEDIA_TYPE_AUDIO:
2084
            data_size = FFMAX(avpkt->size, AVCODEC_MAX_AUDIO_FRAME_SIZE);
2085
            samples = av_malloc(data_size);
2086
            if (!samples)
2087
                goto fail;
2088
            ret = avcodec_decode_audio3(st->codec, samples,
2089
                                        &data_size, avpkt);
2090
            av_free(samples);
2091
            break;
2092
        default:
2093
            break;
2094
        }
2095
    }
2096
 fail:
2097
    return ret;
2098
}
2099

    
2100
unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum CodecID id)
2101
{
2102
    while (tags->id != CODEC_ID_NONE) {
2103
        if (tags->id == id)
2104
            return tags->tag;
2105
        tags++;
2106
    }
2107
    return 0;
2108
}
2109

    
2110
enum CodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
2111
{
2112
    int i;
2113
    for(i=0; tags[i].id != CODEC_ID_NONE;i++) {
2114
        if(tag == tags[i].tag)
2115
            return tags[i].id;
2116
    }
2117
    for(i=0; tags[i].id != CODEC_ID_NONE; i++) {
2118
        if (ff_toupper4(tag) == ff_toupper4(tags[i].tag))
2119
            return tags[i].id;
2120
    }
2121
    return CODEC_ID_NONE;
2122
}
2123

    
2124
unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum CodecID id)
2125
{
2126
    int i;
2127
    for(i=0; tags && tags[i]; i++){
2128
        int tag= ff_codec_get_tag(tags[i], id);
2129
        if(tag) return tag;
2130
    }
2131
    return 0;
2132
}
2133

    
2134
enum CodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag)
2135
{
2136
    int i;
2137
    for(i=0; tags && tags[i]; i++){
2138
        enum CodecID id= ff_codec_get_id(tags[i], tag);
2139
        if(id!=CODEC_ID_NONE) return id;
2140
    }
2141
    return CODEC_ID_NONE;
2142
}
2143

    
2144
static void compute_chapters_end(AVFormatContext *s)
2145
{
2146
    unsigned int i;
2147

    
2148
    for (i=0; i+1<s->nb_chapters; i++)
2149
        if (s->chapters[i]->end == AV_NOPTS_VALUE) {
2150
            assert(s->chapters[i]->start <= s->chapters[i+1]->start);
2151
            assert(!av_cmp_q(s->chapters[i]->time_base, s->chapters[i+1]->time_base));
2152
            s->chapters[i]->end = s->chapters[i+1]->start;
2153
        }
2154

    
2155
    if (s->nb_chapters && s->chapters[i]->end == AV_NOPTS_VALUE) {
2156
        assert(s->start_time != AV_NOPTS_VALUE);
2157
        assert(s->duration > 0);
2158
        s->chapters[i]->end = av_rescale_q(s->start_time + s->duration,
2159
                                           AV_TIME_BASE_Q,
2160
                                           s->chapters[i]->time_base);
2161
    }
2162
}
2163

    
2164
static int get_std_framerate(int i){
2165
    if(i<60*12) return i*1001;
2166
    else        return ((const int[]){24,30,60,12,15})[i-60*12]*1000*12;
2167
}
2168

    
2169
/*
2170
 * Is the time base unreliable.
2171
 * This is a heuristic to balance between quick acceptance of the values in
2172
 * the headers vs. some extra checks.
2173
 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
2174
 * MPEG-2 commonly misuses field repeat flags to store different framerates.
2175
 * And there are "variable" fps files this needs to detect as well.
2176
 */
2177
static int tb_unreliable(AVCodecContext *c){
2178
    if(   c->time_base.den >= 101L*c->time_base.num
2179
       || c->time_base.den <    5L*c->time_base.num
2180
/*       || c->codec_tag == AV_RL32("DIVX")
2181
       || c->codec_tag == AV_RL32("XVID")*/
2182
       || c->codec_id == CODEC_ID_MPEG2VIDEO
2183
       || c->codec_id == CODEC_ID_H264
2184
       )
2185
        return 1;
2186
    return 0;
2187
}
2188

    
2189
int av_find_stream_info(AVFormatContext *ic)
2190
{
2191
    int i, count, ret, read_size, j;
2192
    AVStream *st;
2193
    AVPacket pkt1, *pkt;
2194
    int64_t old_offset = url_ftell(ic->pb);
2195

    
2196
    for(i=0;i<ic->nb_streams;i++) {
2197
        AVCodec *codec;
2198
        st = ic->streams[i];
2199
        if (st->codec->codec_id == CODEC_ID_AAC) {
2200
            st->codec->sample_rate = 0;
2201
            st->codec->frame_size = 0;
2202
            st->codec->channels = 0;
2203
        }
2204
        if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2205
            st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2206
/*            if(!st->time_base.num)
2207
                st->time_base= */
2208
            if(!st->codec->time_base.num)
2209
                st->codec->time_base= st->time_base;
2210
        }
2211
        //only for the split stuff
2212
        if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
2213
            st->parser = av_parser_init(st->codec->codec_id);
2214
            if(st->need_parsing == AVSTREAM_PARSE_HEADERS && st->parser){
2215
                st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
2216
            }
2217
        }
2218
        assert(!st->codec->codec);
2219
        codec = avcodec_find_decoder(st->codec->codec_id);
2220

    
2221
        /* Force decoding of at least one frame of codec data
2222
         * this makes sure the codec initializes the channel configuration
2223
         * and does not trust the values from the container.
2224
         */
2225
        if (codec && codec->capabilities & CODEC_CAP_CHANNEL_CONF)
2226
            st->codec->channels = 0;
2227

    
2228
        /* Ensure that subtitle_header is properly set. */
2229
        if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
2230
            && codec && !st->codec->codec)
2231
            avcodec_open(st->codec, codec);
2232

    
2233
        //try to just open decoders, in case this is enough to get parameters
2234
        if(!has_codec_parameters(st->codec)){
2235
            if (codec && !st->codec->codec)
2236
                avcodec_open(st->codec, codec);
2237
        }
2238
    }
2239

    
2240
    for (i=0; i<ic->nb_streams; i++) {
2241
        ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
2242
    }
2243

    
2244
    count = 0;
2245
    read_size = 0;
2246
    for(;;) {
2247
        if(url_interrupt_cb()){
2248
            ret= AVERROR(EINTR);
2249
            av_log(ic, AV_LOG_DEBUG, "interrupted\n");
2250
            break;
2251
        }
2252

    
2253
        /* check if one codec still needs to be handled */
2254
        for(i=0;i<ic->nb_streams;i++) {
2255
            st = ic->streams[i];
2256
            if (!has_codec_parameters(st->codec))
2257
                break;
2258
            /* variable fps and no guess at the real fps */
2259
            if(   tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num)
2260
               && st->info->duration_count<20 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2261
                break;
2262
            if(st->parser && st->parser->parser->split && !st->codec->extradata)
2263
                break;
2264
            if(st->first_dts == AV_NOPTS_VALUE)
2265
                break;
2266
        }
2267
        if (i == ic->nb_streams) {
2268
            /* NOTE: if the format has no header, then we need to read
2269
               some packets to get most of the streams, so we cannot
2270
               stop here */
2271
            if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
2272
                /* if we found the info for all the codecs, we can stop */
2273
                ret = count;
2274
                av_log(ic, AV_LOG_DEBUG, "All info found\n");
2275
                break;
2276
            }
2277
        }
2278
        /* we did not get all the codec info, but we read too much data */
2279
        if (read_size >= ic->probesize) {
2280
            ret = count;
2281
            av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit %d reached\n", ic->probesize);
2282
            break;
2283
        }
2284

    
2285
        /* NOTE: a new stream can be added there if no header in file
2286
           (AVFMTCTX_NOHEADER) */
2287
        ret = av_read_frame_internal(ic, &pkt1);
2288
        if (ret < 0 && ret != AVERROR(EAGAIN)) {
2289
            /* EOF or error */
2290
            ret = -1; /* we could not have all the codec parameters before EOF */
2291
            for(i=0;i<ic->nb_streams;i++) {
2292
                st = ic->streams[i];
2293
                if (!has_codec_parameters(st->codec)){
2294
                    char buf[256];
2295
                    avcodec_string(buf, sizeof(buf), st->codec, 0);
2296
                    av_log(ic, AV_LOG_WARNING, "Could not find codec parameters (%s)\n", buf);
2297
                } else {
2298
                    ret = 0;
2299
                }
2300
            }
2301
            break;
2302
        }
2303

    
2304
        if (ret == AVERROR(EAGAIN))
2305
            continue;
2306

    
2307
        pkt= add_to_pktbuf(&ic->packet_buffer, &pkt1, &ic->packet_buffer_end);
2308
        if ((ret = av_dup_packet(pkt)) < 0)
2309
            goto find_stream_info_err;
2310

    
2311
        read_size += pkt->size;
2312

    
2313
        st = ic->streams[pkt->stream_index];
2314
        if (st->codec_info_nb_frames>1) {
2315
            if (st->time_base.den > 0 && av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q) >= ic->max_analyze_duration) {
2316
                av_log(ic, AV_LOG_WARNING, "max_analyze_duration reached\n");
2317
                break;
2318
            }
2319
            st->info->codec_info_duration += pkt->duration;
2320
        }
2321
        {
2322
            int64_t last = st->info->last_dts;
2323
            int64_t duration= pkt->dts - last;
2324

    
2325
            if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && duration>0){
2326
                double dur= duration * av_q2d(st->time_base);
2327

    
2328
//                if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2329
//                    av_log(NULL, AV_LOG_ERROR, "%f\n", dur);
2330
                if (st->info->duration_count < 2)
2331
                    memset(st->info->duration_error, 0, sizeof(st->info->duration_error));
2332
                for (i=1; i<FF_ARRAY_ELEMS(st->info->duration_error); i++) {
2333
                    int framerate= get_std_framerate(i);
2334
                    int ticks= lrintf(dur*framerate/(1001*12));
2335
                    double error= dur - ticks*1001*12/(double)framerate;
2336
                    st->info->duration_error[i] += error*error;
2337
                }
2338
                st->info->duration_count++;
2339
                // ignore the first 4 values, they might have some random jitter
2340
                if (st->info->duration_count > 3)
2341
                    st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
2342
            }
2343
            if (last == AV_NOPTS_VALUE || st->info->duration_count <= 1)
2344
                st->info->last_dts = pkt->dts;
2345
        }
2346
        if(st->parser && st->parser->parser->split && !st->codec->extradata){
2347
            int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
2348
            if(i){
2349
                st->codec->extradata_size= i;
2350
                st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
2351
                memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
2352
                memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2353
            }
2354
        }
2355

    
2356
        /* if still no information, we try to open the codec and to
2357
           decompress the frame. We try to avoid that in most cases as
2358
           it takes longer and uses more memory. For MPEG-4, we need to
2359
           decompress for QuickTime. */
2360
        if (!has_codec_parameters(st->codec) || !has_decode_delay_been_guessed(st))
2361
            try_decode_frame(st, pkt);
2362

    
2363
        st->codec_info_nb_frames++;
2364
        count++;
2365
    }
2366

    
2367
    // close codecs which were opened in try_decode_frame()
2368
    for(i=0;i<ic->nb_streams;i++) {
2369
        st = ic->streams[i];
2370
        if(st->codec->codec)
2371
            avcodec_close(st->codec);
2372
    }
2373
    for(i=0;i<ic->nb_streams;i++) {
2374
        st = ic->streams[i];
2375
        if (st->codec_info_nb_frames>2 && !st->avg_frame_rate.num && st->info->codec_info_duration)
2376
            av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2377
                     (st->codec_info_nb_frames-2)*(int64_t)st->time_base.den,
2378
                      st->info->codec_info_duration*(int64_t)st->time_base.num, 60000);
2379
        if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2380
            if(st->codec->codec_id == CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample)
2381
                st->codec->codec_tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
2382

    
2383
            // the check for tb_unreliable() is not completely correct, since this is not about handling
2384
            // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
2385
            // ipmovie.c produces.
2386
            if (tb_unreliable(st->codec) && st->info->duration_count > 15 && st->info->duration_gcd > 1 && !st->r_frame_rate.num)
2387
                av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, st->time_base.den, st->time_base.num * st->info->duration_gcd, INT_MAX);
2388
            if (st->info->duration_count && !st->r_frame_rate.num
2389
               && tb_unreliable(st->codec) /*&&
2390
               //FIXME we should not special-case MPEG-2, but this needs testing with non-MPEG-2 ...
2391
               st->time_base.num*duration_sum[i]/st->info->duration_count*101LL > st->time_base.den*/){
2392
                int num = 0;
2393
                double best_error= 2*av_q2d(st->time_base);
2394
                best_error = best_error*best_error*st->info->duration_count*1000*12*30;
2395

    
2396
                for (j=1; j<FF_ARRAY_ELEMS(st->info->duration_error); j++) {
2397
                    double error = st->info->duration_error[j] * get_std_framerate(j);
2398
//                    if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2399
//                        av_log(NULL, AV_LOG_ERROR, "%f %f\n", get_std_framerate(j) / 12.0/1001, error);
2400
                    if(error < best_error){
2401
                        best_error= error;
2402
                        num = get_std_framerate(j);
2403
                    }
2404
                }
2405
                // do not increase frame rate by more than 1 % in order to match a standard rate.
2406
                if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate)))
2407
                    av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
2408
            }
2409

    
2410
            if (!st->r_frame_rate.num){
2411
                if(    st->codec->time_base.den * (int64_t)st->time_base.num
2412
                    <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t)st->time_base.den){
2413
                    st->r_frame_rate.num = st->codec->time_base.den;
2414
                    st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame;
2415
                }else{
2416
                    st->r_frame_rate.num = st->time_base.den;
2417
                    st->r_frame_rate.den = st->time_base.num;
2418
                }
2419
            }
2420
        }else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2421
            if(!st->codec->bits_per_coded_sample)
2422
                st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id);
2423
        }
2424
    }
2425

    
2426
    av_estimate_timings(ic, old_offset);
2427

    
2428
    compute_chapters_end(ic);
2429

    
2430
#if 0
2431
    /* correct DTS for B-frame streams with no timestamps */
2432
    for(i=0;i<ic->nb_streams;i++) {
2433
        st = ic->streams[i];
2434
        if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2435
            if(b-frames){
2436
                ppktl = &ic->packet_buffer;
2437
                while(ppkt1){
2438
                    if(ppkt1->stream_index != i)
2439
                        continue;
2440
                    if(ppkt1->pkt->dts < 0)
2441
                        break;
2442
                    if(ppkt1->pkt->pts != AV_NOPTS_VALUE)
2443
                        break;
2444
                    ppkt1->pkt->dts -= delta;
2445
                    ppkt1= ppkt1->next;
2446
                }
2447
                if(ppkt1)
2448
                    continue;
2449
                st->cur_dts -= delta;
2450
            }
2451
        }
2452
    }
2453
#endif
2454

    
2455
 find_stream_info_err:
2456
    for (i=0; i < ic->nb_streams; i++)
2457
        av_freep(&ic->streams[i]->info);
2458
    return ret;
2459
}
2460

    
2461
/*******************************************************/
2462

    
2463
int av_read_play(AVFormatContext *s)
2464
{
2465
    if (s->iformat->read_play)
2466
        return s->iformat->read_play(s);
2467
    if (s->pb)
2468
        return av_url_read_fpause(s->pb, 0);
2469
    return AVERROR(ENOSYS);
2470
}
2471

    
2472
int av_read_pause(AVFormatContext *s)
2473
{
2474
    if (s->iformat->read_pause)
2475
        return s->iformat->read_pause(s);
2476
    if (s->pb)
2477
        return av_url_read_fpause(s->pb, 1);
2478
    return AVERROR(ENOSYS);
2479
}
2480

    
2481
void av_close_input_stream(AVFormatContext *s)
2482
{
2483
    int i;
2484
    AVStream *st;
2485

    
2486
    if (s->iformat->read_close)
2487
        s->iformat->read_close(s);
2488
    for(i=0;i<s->nb_streams;i++) {
2489
        /* free all data in a stream component */
2490
        st = s->streams[i];
2491
        if (st->parser) {
2492
            av_parser_close(st->parser);
2493
            av_free_packet(&st->cur_pkt);
2494
        }
2495
        av_metadata_free(&st->metadata);
2496
        av_free(st->index_entries);
2497
        av_free(st->codec->extradata);
2498
        av_free(st->codec->subtitle_header);
2499
        av_free(st->codec);
2500
#if FF_API_OLD_METADATA
2501
        av_free(st->filename);
2502
#endif
2503
        av_free(st->priv_data);
2504
        av_free(st->info);
2505
        av_free(st);
2506
    }
2507
    for(i=s->nb_programs-1; i>=0; i--) {
2508
#if FF_API_OLD_METADATA
2509
        av_freep(&s->programs[i]->provider_name);
2510
        av_freep(&s->programs[i]->name);
2511
#endif
2512
        av_metadata_free(&s->programs[i]->metadata);
2513
        av_freep(&s->programs[i]->stream_index);
2514
        av_freep(&s->programs[i]);
2515
    }
2516
    av_freep(&s->programs);
2517
    flush_packet_queue(s);
2518
    av_freep(&s->priv_data);
2519
    while(s->nb_chapters--) {
2520
#if FF_API_OLD_METADATA
2521
        av_free(s->chapters[s->nb_chapters]->title);
2522
#endif
2523
        av_metadata_free(&s->chapters[s->nb_chapters]->metadata);
2524
        av_free(s->chapters[s->nb_chapters]);
2525
    }
2526
    av_freep(&s->chapters);
2527
    av_metadata_free(&s->metadata);
2528
    av_freep(&s->key);
2529
    av_free(s);
2530
}
2531

    
2532
void av_close_input_file(AVFormatContext *s)
2533
{
2534
    ByteIOContext *pb = s->iformat->flags & AVFMT_NOFILE ? NULL : s->pb;
2535
    av_close_input_stream(s);
2536
    if (pb)
2537
        url_fclose(pb);
2538
}
2539

    
2540
AVStream *av_new_stream(AVFormatContext *s, int id)
2541
{
2542
    AVStream *st;
2543
    int i;
2544

    
2545
#if FF_API_MAX_STREAMS
2546
    if (s->nb_streams >= MAX_STREAMS){
2547
        av_log(s, AV_LOG_ERROR, "Too many streams\n");
2548
        return NULL;
2549
    }
2550
#else
2551
    AVStream **streams;
2552

    
2553
    if (s->nb_streams >= INT_MAX/sizeof(*streams))
2554
        return NULL;
2555
    streams = av_realloc(s->streams, (s->nb_streams + 1) * sizeof(*streams));
2556
    if (!streams)
2557
        return NULL;
2558
    s->streams = streams;
2559
#endif
2560

    
2561
    st = av_mallocz(sizeof(AVStream));
2562
    if (!st)
2563
        return NULL;
2564
    if (!(st->info = av_mallocz(sizeof(*st->info)))) {
2565
        av_free(st);
2566
        return NULL;
2567
    }
2568

    
2569
    st->codec= avcodec_alloc_context();
2570
    if (s->iformat) {
2571
        /* no default bitrate if decoding */
2572
        st->codec->bit_rate = 0;
2573
    }
2574
    st->index = s->nb_streams;
2575
    st->id = id;
2576
    st->start_time = AV_NOPTS_VALUE;
2577
    st->duration = AV_NOPTS_VALUE;
2578
        /* we set the current DTS to 0 so that formats without any timestamps
2579
           but durations get some timestamps, formats with some unknown
2580
           timestamps have their first few packets buffered and the
2581
           timestamps corrected before they are returned to the user */
2582
    st->cur_dts = 0;
2583
    st->first_dts = AV_NOPTS_VALUE;
2584
    st->probe_packets = MAX_PROBE_PACKETS;
2585

    
2586
    /* default pts setting is MPEG-like */
2587
    av_set_pts_info(st, 33, 1, 90000);
2588
    st->last_IP_pts = AV_NOPTS_VALUE;
2589
    for(i=0; i<MAX_REORDER_DELAY+1; i++)
2590
        st->pts_buffer[i]= AV_NOPTS_VALUE;
2591
    st->reference_dts = AV_NOPTS_VALUE;
2592

    
2593
    st->sample_aspect_ratio = (AVRational){0,1};
2594

    
2595
    s->streams[s->nb_streams++] = st;
2596
    return st;
2597
}
2598

    
2599
AVProgram *av_new_program(AVFormatContext *ac, int id)
2600
{
2601
    AVProgram *program=NULL;
2602
    int i;
2603

    
2604
#ifdef DEBUG_SI
2605
    av_log(ac, AV_LOG_DEBUG, "new_program: id=0x%04x\n", id);
2606
#endif
2607

    
2608
    for(i=0; i<ac->nb_programs; i++)
2609
        if(ac->programs[i]->id == id)
2610
            program = ac->programs[i];
2611

    
2612
    if(!program){
2613
        program = av_mallocz(sizeof(AVProgram));
2614
        if (!program)
2615
            return NULL;
2616
        dynarray_add(&ac->programs, &ac->nb_programs, program);
2617
        program->discard = AVDISCARD_NONE;
2618
    }
2619
    program->id = id;
2620

    
2621
    return program;
2622
}
2623

    
2624
AVChapter *ff_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
2625
{
2626
    AVChapter *chapter = NULL;
2627
    int i;
2628

    
2629
    for(i=0; i<s->nb_chapters; i++)
2630
        if(s->chapters[i]->id == id)
2631
            chapter = s->chapters[i];
2632

    
2633
    if(!chapter){
2634
        chapter= av_mallocz(sizeof(AVChapter));
2635
        if(!chapter)
2636
            return NULL;
2637
        dynarray_add(&s->chapters, &s->nb_chapters, chapter);
2638
    }
2639
#if FF_API_OLD_METADATA
2640
    av_free(chapter->title);
2641
#endif
2642
    av_metadata_set2(&chapter->metadata, "title", title, 0);
2643
    chapter->id    = id;
2644
    chapter->time_base= time_base;
2645
    chapter->start = start;
2646
    chapter->end   = end;
2647

    
2648
    return chapter;
2649
}
2650

    
2651
/************************************************************/
2652
/* output media file */
2653

    
2654
int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap)
2655
{
2656
    int ret;
2657

    
2658
    if (s->oformat->priv_data_size > 0) {
2659
        s->priv_data = av_mallocz(s->oformat->priv_data_size);
2660
        if (!s->priv_data)
2661
            return AVERROR(ENOMEM);
2662
    } else
2663
        s->priv_data = NULL;
2664

    
2665
    if (s->oformat->set_parameters) {
2666
        ret = s->oformat->set_parameters(s, ap);
2667
        if (ret < 0)
2668
            return ret;
2669
    }
2670
    return 0;
2671
}
2672

    
2673
static int validate_codec_tag(AVFormatContext *s, AVStream *st)
2674
{
2675
    const AVCodecTag *avctag;
2676
    int n;
2677
    enum CodecID id = CODEC_ID_NONE;
2678
    unsigned int tag = 0;
2679

    
2680
    /**
2681
     * Check that tag + id is in the table
2682
     * If neither is in the table -> OK
2683
     * If tag is in the table with another id -> FAIL
2684
     * If id is in the table with another tag -> FAIL unless strict < normal
2685
     */
2686
    for (n = 0; s->oformat->codec_tag[n]; n++) {
2687
        avctag = s->oformat->codec_tag[n];
2688
        while (avctag->id != CODEC_ID_NONE) {
2689
            if (ff_toupper4(avctag->tag) == ff_toupper4(st->codec->codec_tag)) {
2690
                id = avctag->id;
2691
                if (id == st->codec->codec_id)
2692
                    return 1;
2693
            }
2694
            if (avctag->id == st->codec->codec_id)
2695
                tag = avctag->tag;
2696
            avctag++;
2697
        }
2698
    }
2699
    if (id != CODEC_ID_NONE)
2700
        return 0;
2701
    if (tag && (st->codec->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
2702
        return 0;
2703
    return 1;
2704
}
2705

    
2706
int av_write_header(AVFormatContext *s)
2707
{
2708
    int ret, i;
2709
    AVStream *st;
2710

    
2711
    // some sanity checks
2712
    if (s->nb_streams == 0) {
2713
        av_log(s, AV_LOG_ERROR, "no streams\n");
2714
        return AVERROR(EINVAL);
2715
    }
2716

    
2717
    for(i=0;i<s->nb_streams;i++) {
2718
        st = s->streams[i];
2719

    
2720
        switch (st->codec->codec_type) {
2721
        case AVMEDIA_TYPE_AUDIO:
2722
            if(st->codec->sample_rate<=0){
2723
                av_log(s, AV_LOG_ERROR, "sample rate not set\n");
2724
                return AVERROR(EINVAL);
2725
            }
2726
            if(!st->codec->block_align)
2727
                st->codec->block_align = st->codec->channels *
2728
                    av_get_bits_per_sample(st->codec->codec_id) >> 3;
2729
            break;
2730
        case AVMEDIA_TYPE_VIDEO:
2731
            if(st->codec->time_base.num<=0 || st->codec->time_base.den<=0){ //FIXME audio too?
2732
                av_log(s, AV_LOG_ERROR, "time base not set\n");
2733
                return AVERROR(EINVAL);
2734
            }
2735
            if((st->codec->width<=0 || st->codec->height<=0) && !(s->oformat->flags & AVFMT_NODIMENSIONS)){
2736
                av_log(s, AV_LOG_ERROR, "dimensions not set\n");
2737
                return AVERROR(EINVAL);
2738
            }
2739
            if(av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)){
2740
                av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between encoder and muxer layer\n");
2741
                return AVERROR(EINVAL);
2742
            }
2743
            break;
2744
        }
2745

    
2746
        if(s->oformat->codec_tag){
2747
            if(st->codec->codec_tag && st->codec->codec_id == CODEC_ID_RAWVIDEO && av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id) == 0 && !validate_codec_tag(s, st)){
2748
                //the current rawvideo encoding system ends up setting the wrong codec_tag for avi, we override it here
2749
                st->codec->codec_tag= 0;
2750
            }
2751
            if(st->codec->codec_tag){
2752
                if (!validate_codec_tag(s, st)) {
2753
                    char tagbuf[32];
2754
                    av_get_codec_tag_string(tagbuf, sizeof(tagbuf), st->codec->codec_tag);
2755
                    av_log(s, AV_LOG_ERROR,
2756
                           "Tag %s/0x%08x incompatible with output codec id '%d'\n",
2757
                           tagbuf, st->codec->codec_tag, st->codec->codec_id);
2758
                    return AVERROR_INVALIDDATA;
2759
                }
2760
            }else
2761
                st->codec->codec_tag= av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id);
2762
        }
2763

    
2764
        if(s->oformat->flags & AVFMT_GLOBALHEADER &&
2765
            !(st->codec->flags & CODEC_FLAG_GLOBAL_HEADER))
2766
          av_log(s, AV_LOG_WARNING, "Codec for stream %d does not use global headers but container format requires global headers\n", i);
2767
    }
2768

    
2769
    if (!s->priv_data && s->oformat->priv_data_size > 0) {
2770
        s->priv_data = av_mallocz(s->oformat->priv_data_size);
2771
        if (!s->priv_data)
2772
            return AVERROR(ENOMEM);
2773
    }
2774

    
2775
#if FF_API_OLD_METADATA
2776
    ff_metadata_mux_compat(s);
2777
#endif
2778

    
2779
    /* set muxer identification string */
2780
    if (!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
2781
        av_metadata_set2(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
2782
    }
2783

    
2784
    if(s->oformat->write_header){
2785
        ret = s->oformat->write_header(s);
2786
        if (ret < 0)
2787
            return ret;
2788
    }
2789

    
2790
    /* init PTS generation */
2791
    for(i=0;i<s->nb_streams;i++) {
2792
        int64_t den = AV_NOPTS_VALUE;
2793
        st = s->streams[i];
2794

    
2795
        switch (st->codec->codec_type) {
2796
        case AVMEDIA_TYPE_AUDIO:
2797
            den = (int64_t)st->time_base.num * st->codec->sample_rate;
2798
            break;
2799
        case AVMEDIA_TYPE_VIDEO:
2800
            den = (int64_t)st->time_base.num * st->codec->time_base.den;
2801
            break;
2802
        default:
2803
            break;
2804
        }
2805
        if (den != AV_NOPTS_VALUE) {
2806
            if (den <= 0)
2807
                return AVERROR_INVALIDDATA;
2808
            av_frac_init(&st->pts, 0, 0, den);
2809
        }
2810
    }
2811
    return 0;
2812
}
2813

    
2814
//FIXME merge with compute_pkt_fields
2815
static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt){
2816
    int delay = FFMAX(st->codec->has_b_frames, !!st->codec->max_b_frames);
2817
    int num, den, frame_size, i;
2818

    
2819
//    av_log(s, AV_LOG_DEBUG, "av_write_frame: pts:%"PRId64" dts:%"PRId64" cur_dts:%"PRId64" b:%d size:%d st:%d\n", pkt->pts, pkt->dts, st->cur_dts, delay, pkt->size, pkt->stream_index);
2820

    
2821
/*    if(pkt->pts == AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE)
2822
        return -1;*/
2823

    
2824
    /* duration field */
2825
    if (pkt->duration == 0) {
2826
        compute_frame_duration(&num, &den, st, NULL, pkt);
2827
        if (den && num) {
2828
            pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
2829
        }
2830
    }
2831

    
2832
    if(pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay==0)
2833
        pkt->pts= pkt->dts;
2834

    
2835
    //XXX/FIXME this is a temporary hack until all encoders output pts
2836
    if((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay){
2837
        pkt->dts=
2838
//        pkt->pts= st->cur_dts;
2839
        pkt->pts= st->pts.val;
2840
    }
2841

    
2842
    //calculate dts from pts
2843
    if(pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
2844
        st->pts_buffer[0]= pkt->pts;
2845
        for(i=1; i<delay+1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
2846
            st->pts_buffer[i]= pkt->pts + (i-delay-1) * pkt->duration;
2847
        for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
2848
            FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
2849

    
2850
        pkt->dts= st->pts_buffer[0];
2851
    }
2852

    
2853
    if(st->cur_dts && st->cur_dts != AV_NOPTS_VALUE && st->cur_dts >= pkt->dts){
2854
        av_log(s, AV_LOG_ERROR,
2855
               "st:%d error, non monotone timestamps %"PRId64" >= %"PRId64"\n",
2856
               st->index, st->cur_dts, pkt->dts);
2857
        return -1;
2858
    }
2859
    if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts){
2860
        av_log(s, AV_LOG_ERROR, "st:%d error, pts < dts\n", st->index);
2861
        return -1;
2862
    }
2863

    
2864
//    av_log(s, AV_LOG_DEBUG, "av_write_frame: pts2:%"PRId64" dts2:%"PRId64"\n", pkt->pts, pkt->dts);
2865
    st->cur_dts= pkt->dts;
2866
    st->pts.val= pkt->dts;
2867

    
2868
    /* update pts */
2869
    switch (st->codec->codec_type) {
2870
    case AVMEDIA_TYPE_AUDIO:
2871
        frame_size = get_audio_frame_size(st->codec, pkt->size);
2872

    
2873
        /* HACK/FIXME, we skip the initial 0 size packets as they are most
2874
           likely equal to the encoder delay, but it would be better if we
2875
           had the real timestamps from the encoder */
2876
        if (frame_size >= 0 && (pkt->size || st->pts.num!=st->pts.den>>1 || st->pts.val)) {
2877
            av_frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
2878
        }
2879
        break;
2880
    case AVMEDIA_TYPE_VIDEO:
2881
        av_frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num);
2882
        break;
2883
    default:
2884
        break;
2885
    }
2886
    return 0;
2887
}
2888

    
2889
int av_write_frame(AVFormatContext *s, AVPacket *pkt)
2890
{
2891
    int ret = compute_pkt_fields2(s, s->streams[pkt->stream_index], pkt);
2892

    
2893
    if(ret<0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
2894
        return ret;
2895

    
2896
    ret= s->oformat->write_packet(s, pkt);
2897
    if(!ret)
2898
        ret= url_ferror(s->pb);
2899
    return ret;
2900
}
2901

    
2902
void ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
2903
                              int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
2904
{
2905
    AVPacketList **next_point, *this_pktl;
2906

    
2907
    this_pktl = av_mallocz(sizeof(AVPacketList));
2908
    this_pktl->pkt= *pkt;
2909
    pkt->destruct= NULL;             // do not free original but only the copy
2910
    av_dup_packet(&this_pktl->pkt);  // duplicate the packet if it uses non-alloced memory
2911

    
2912
    if(s->streams[pkt->stream_index]->last_in_packet_buffer){
2913
        next_point = &(s->streams[pkt->stream_index]->last_in_packet_buffer->next);
2914
    }else
2915
        next_point = &s->packet_buffer;
2916

    
2917
    if(*next_point){
2918
        if(compare(s, &s->packet_buffer_end->pkt, pkt)){
2919
            while(!compare(s, &(*next_point)->pkt, pkt)){
2920
                next_point= &(*next_point)->next;
2921
            }
2922
            goto next_non_null;
2923
        }else{
2924
            next_point = &(s->packet_buffer_end->next);
2925
        }
2926
    }
2927
    assert(!*next_point);
2928

    
2929
    s->packet_buffer_end= this_pktl;
2930
next_non_null:
2931

    
2932
    this_pktl->next= *next_point;
2933

    
2934
    s->streams[pkt->stream_index]->last_in_packet_buffer=
2935
    *next_point= this_pktl;
2936
}
2937

    
2938
int ff_interleave_compare_dts(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
2939
{
2940
    AVStream *st = s->streams[ pkt ->stream_index];
2941
    AVStream *st2= s->streams[ next->stream_index];
2942
    int64_t a= st2->time_base.num * (int64_t)st ->time_base.den;
2943
    int64_t b= st ->time_base.num * (int64_t)st2->time_base.den;
2944
    return av_rescale_rnd(pkt->dts, b, a, AV_ROUND_DOWN) < next->dts;
2945
}
2946

    
2947
int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush){
2948
    AVPacketList *pktl;
2949
    int stream_count=0;
2950
    int i;
2951

    
2952
    if(pkt){
2953
        ff_interleave_add_packet(s, pkt, ff_interleave_compare_dts);
2954
    }
2955

    
2956
    for(i=0; i < s->nb_streams; i++)
2957
        stream_count+= !!s->streams[i]->last_in_packet_buffer;
2958

    
2959
    if(stream_count && (s->nb_streams == stream_count || flush)){
2960
        pktl= s->packet_buffer;
2961
        *out= pktl->pkt;
2962

    
2963
        s->packet_buffer= pktl->next;
2964
        if(!s->packet_buffer)
2965
            s->packet_buffer_end= NULL;
2966

    
2967
        if(s->streams[out->stream_index]->last_in_packet_buffer == pktl)
2968
            s->streams[out->stream_index]->last_in_packet_buffer= NULL;
2969
        av_freep(&pktl);
2970
        return 1;
2971
    }else{
2972
        av_init_packet(out);
2973
        return 0;
2974
    }
2975
}
2976

    
2977
/**
2978
 * Interleave an AVPacket correctly so it can be muxed.
2979
 * @param out the interleaved packet will be output here
2980
 * @param in the input packet
2981
 * @param flush 1 if no further packets are available as input and all
2982
 *              remaining packets should be output
2983
 * @return 1 if a packet was output, 0 if no packet could be output,
2984
 *         < 0 if an error occurred
2985
 */
2986
static int av_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush){
2987
    if(s->oformat->interleave_packet)
2988
        return s->oformat->interleave_packet(s, out, in, flush);
2989
    else
2990
        return av_interleave_packet_per_dts(s, out, in, flush);
2991
}
2992

    
2993
int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){
2994
    AVStream *st= s->streams[ pkt->stream_index];
2995

    
2996
    //FIXME/XXX/HACK drop zero sized packets
2997
    if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->size==0)
2998
        return 0;
2999

    
3000
//av_log(NULL, AV_LOG_DEBUG, "av_interleaved_write_frame %d %"PRId64" %"PRId64"\n", pkt->size, pkt->dts, pkt->pts);
3001
    if(compute_pkt_fields2(s, st, pkt) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3002
        return -1;
3003

    
3004
    if(pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3005
        return -1;
3006

    
3007
    for(;;){
3008
        AVPacket opkt;
3009
        int ret= av_interleave_packet(s, &opkt, pkt, 0);
3010
        if(ret<=0) //FIXME cleanup needed for ret<0 ?
3011
            return ret;
3012

    
3013
        ret= s->oformat->write_packet(s, &opkt);
3014

    
3015
        av_free_packet(&opkt);
3016
        pkt= NULL;
3017

    
3018
        if(ret<0)
3019
            return ret;
3020
        if(url_ferror(s->pb))
3021
            return url_ferror(s->pb);
3022
    }
3023
}
3024

    
3025
int av_write_trailer(AVFormatContext *s)
3026
{
3027
    int ret, i;
3028

    
3029
    for(;;){
3030
        AVPacket pkt;
3031
        ret= av_interleave_packet(s, &pkt, NULL, 1);
3032
        if(ret<0) //FIXME cleanup needed for ret<0 ?
3033
            goto fail;
3034
        if(!ret)
3035
            break;
3036

    
3037
        ret= s->oformat->write_packet(s, &pkt);
3038

    
3039
        av_free_packet(&pkt);
3040

    
3041
        if(ret<0)
3042
            goto fail;
3043
        if(url_ferror(s->pb))
3044
            goto fail;
3045
    }
3046

    
3047
    if(s->oformat->write_trailer)
3048
        ret = s->oformat->write_trailer(s);
3049
fail:
3050
    if(ret == 0)
3051
       ret=url_ferror(s->pb);
3052
    for(i=0;i<s->nb_streams;i++) {
3053
        av_freep(&s->streams[i]->priv_data);
3054
        av_freep(&s->streams[i]->index_entries);
3055
    }
3056
    av_freep(&s->priv_data);
3057
    return ret;
3058
}
3059

    
3060
void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
3061
{
3062
    int i, j;
3063
    AVProgram *program=NULL;
3064
    void *tmp;
3065

    
3066
    if (idx >= ac->nb_streams) {
3067
        av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3068
        return;
3069
    }
3070

    
3071
    for(i=0; i<ac->nb_programs; i++){
3072
        if(ac->programs[i]->id != progid)
3073
            continue;
3074
        program = ac->programs[i];
3075
        for(j=0; j<program->nb_stream_indexes; j++)
3076
            if(program->stream_index[j] == idx)
3077
                return;
3078

    
3079
        tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1));
3080
        if(!tmp)
3081
            return;
3082
        program->stream_index = tmp;
3083
        program->stream_index[program->nb_stream_indexes++] = idx;
3084
        return;
3085
    }
3086
}
3087

    
3088
static void print_fps(double d, const char *postfix){
3089
    uint64_t v= lrintf(d*100);
3090
    if     (v% 100      ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix);
3091
    else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix);
3092
    else                  av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix);
3093
}
3094

    
3095
static void dump_metadata(void *ctx, AVMetadata *m, const char *indent)
3096
{
3097
    if(m && !(m->count == 1 && av_metadata_get(m, "language", NULL, 0))){
3098
        AVMetadataTag *tag=NULL;
3099

    
3100
        av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
3101
        while((tag=av_metadata_get(m, "", tag, AV_METADATA_IGNORE_SUFFIX))) {
3102
            if(strcmp("language", tag->key))
3103
                av_log(ctx, AV_LOG_INFO, "%s  %-16s: %s\n", indent, tag->key, tag->value);
3104
        }
3105
    }
3106
}
3107

    
3108
/* "user interface" functions */
3109
static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output)
3110
{
3111
    char buf[256];
3112
    int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
3113
    AVStream *st = ic->streams[i];
3114
    int g = av_gcd(st->time_base.num, st->time_base.den);
3115
    AVMetadataTag *lang = av_metadata_get(st->metadata, "language", NULL, 0);
3116
    avcodec_string(buf, sizeof(buf), st->codec, is_output);
3117
    av_log(NULL, AV_LOG_INFO, "    Stream #%d.%d", index, i);
3118
    /* the pid is an important information, so we display it */
3119
    /* XXX: add a generic system */
3120
    if (flags & AVFMT_SHOW_IDS)
3121
        av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
3122
    if (lang)
3123
        av_log(NULL, AV_LOG_INFO, "(%s)", lang->value);
3124
    av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames, st->time_base.num/g, st->time_base.den/g);
3125
    av_log(NULL, AV_LOG_INFO, ": %s", buf);
3126
    if (st->sample_aspect_ratio.num && // default
3127
        av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) {
3128
        AVRational display_aspect_ratio;
3129
        av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
3130
                  st->codec->width*st->sample_aspect_ratio.num,
3131
                  st->codec->height*st->sample_aspect_ratio.den,
3132
                  1024*1024);
3133
        av_log(NULL, AV_LOG_INFO, ", PAR %d:%d DAR %d:%d",
3134
                 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3135
                 display_aspect_ratio.num, display_aspect_ratio.den);
3136
    }
3137
    if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
3138
        if(st->avg_frame_rate.den && st->avg_frame_rate.num)
3139
            print_fps(av_q2d(st->avg_frame_rate), "fps");
3140
        if(st->r_frame_rate.den && st->r_frame_rate.num)
3141
            print_fps(av_q2d(st->r_frame_rate), "tbr");
3142
        if(st->time_base.den && st->time_base.num)
3143
            print_fps(1/av_q2d(st->time_base), "tbn");
3144
        if(st->codec->time_base.den && st->codec->time_base.num)
3145
            print_fps(1/av_q2d(st->codec->time_base), "tbc");
3146
    }
3147
    av_log(NULL, AV_LOG_INFO, "\n");
3148
    dump_metadata(NULL, st->metadata, "    ");
3149
}
3150

    
3151
void dump_format(AVFormatContext *ic,
3152
                 int index,
3153
                 const char *url,
3154
                 int is_output)
3155
{
3156
    int i;
3157
    uint8_t *printed = av_mallocz(ic->nb_streams);
3158
    if (ic->nb_streams && !printed)
3159
        return;
3160

    
3161
    av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
3162
            is_output ? "Output" : "Input",
3163
            index,
3164
            is_output ? ic->oformat->name : ic->iformat->name,
3165
            is_output ? "to" : "from", url);
3166
    dump_metadata(NULL, ic->metadata, "  ");
3167
    if (!is_output) {
3168
        av_log(NULL, AV_LOG_INFO, "  Duration: ");
3169
        if (ic->duration != AV_NOPTS_VALUE) {
3170
            int hours, mins, secs, us;
3171
            secs = ic->duration / AV_TIME_BASE;
3172
            us = ic->duration % AV_TIME_BASE;
3173
            mins = secs / 60;
3174
            secs %= 60;
3175
            hours = mins / 60;
3176
            mins %= 60;
3177
            av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs,
3178
                   (100 * us) / AV_TIME_BASE);
3179
        } else {
3180
            av_log(NULL, AV_LOG_INFO, "N/A");
3181
        }
3182
        if (ic->start_time != AV_NOPTS_VALUE) {
3183
            int secs, us;
3184
            av_log(NULL, AV_LOG_INFO, ", start: ");
3185
            secs = ic->start_time / AV_TIME_BASE;
3186
            us = abs(ic->start_time % AV_TIME_BASE);
3187
            av_log(NULL, AV_LOG_INFO, "%d.%06d",
3188
                   secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
3189
        }
3190
        av_log(NULL, AV_LOG_INFO, ", bitrate: ");
3191
        if (ic->bit_rate) {
3192
            av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
3193
        } else {
3194
            av_log(NULL, AV_LOG_INFO, "N/A");
3195
        }
3196
        av_log(NULL, AV_LOG_INFO, "\n");
3197
    }
3198
    for (i = 0; i < ic->nb_chapters; i++) {
3199
        AVChapter *ch = ic->chapters[i];
3200
        av_log(NULL, AV_LOG_INFO, "    Chapter #%d.%d: ", index, i);
3201
        av_log(NULL, AV_LOG_INFO, "start %f, ", ch->start * av_q2d(ch->time_base));
3202
        av_log(NULL, AV_LOG_INFO, "end %f\n",   ch->end   * av_q2d(ch->time_base));
3203

    
3204
        dump_metadata(NULL, ch->metadata, "    ");
3205
    }
3206
    if(ic->nb_programs) {
3207
        int j, k, total = 0;
3208
        for(j=0; j<ic->nb_programs; j++) {
3209
            AVMetadataTag *name = av_metadata_get(ic->programs[j]->metadata,
3210
                                                  "name", NULL, 0);
3211
            av_log(NULL, AV_LOG_INFO, "  Program %d %s\n", ic->programs[j]->id,
3212
                   name ? name->value : "");
3213
            dump_metadata(NULL, ic->programs[j]->metadata, "    ");
3214
            for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) {
3215
                dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output);
3216
                printed[ic->programs[j]->stream_index[k]] = 1;
3217
            }
3218
            total += ic->programs[j]->nb_stream_indexes;
3219
        }
3220
        if (total < ic->nb_streams)
3221
            av_log(NULL, AV_LOG_INFO, "  No Program\n");
3222
    }
3223
    for(i=0;i<ic->nb_streams;i++)
3224
        if (!printed[i])
3225
            dump_stream_format(ic, i, index, is_output);
3226

    
3227
    av_free(printed);
3228
}
3229

    
3230
#if FF_API_PARSE_FRAME_PARAM
3231
#include "libavcore/parseutils.h"
3232

    
3233
int parse_image_size(int *width_ptr, int *height_ptr, const char *str)
3234
{
3235
    return av_parse_video_size(width_ptr, height_ptr, str);
3236
}
3237

    
3238
int parse_frame_rate(int *frame_rate_num, int *frame_rate_den, const char *arg)
3239
{
3240
    AVRational frame_rate;
3241
    int ret = av_parse_video_rate(&frame_rate, arg);
3242
    *frame_rate_num= frame_rate.num;
3243
    *frame_rate_den= frame_rate.den;
3244
    return ret;
3245
}
3246
#endif
3247

    
3248
int64_t av_gettime(void)
3249
{
3250
    struct timeval tv;
3251
    gettimeofday(&tv,NULL);
3252
    return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
3253
}
3254

    
3255
uint64_t ff_ntp_time(void)
3256
{
3257
  return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
3258
}
3259

    
3260
int64_t parse_date(const char *datestr, int duration)
3261
{
3262
    const char *p;
3263
    int64_t t;
3264
    struct tm dt;
3265
    int i;
3266
    static const char * const date_fmt[] = {
3267
        "%Y-%m-%d",
3268
        "%Y%m%d",
3269
    };
3270
    static const char * const time_fmt[] = {
3271
        "%H:%M:%S",
3272
        "%H%M%S",
3273
    };
3274
    const char *q;
3275
    int is_utc, len;
3276
    char lastch;
3277
    int negative = 0;
3278

    
3279
#undef time
3280
    time_t now = time(0);
3281

    
3282
    len = strlen(datestr);
3283
    if (len > 0)
3284
        lastch = datestr[len - 1];
3285
    else
3286
        lastch = '\0';
3287
    is_utc = (lastch == 'z' || lastch == 'Z');
3288

    
3289
    memset(&dt, 0, sizeof(dt));
3290

    
3291
    p = datestr;
3292
    q = NULL;
3293
    if (!duration) {
3294
        if (!strncasecmp(datestr, "now", len))
3295
            return (int64_t) now * 1000000;
3296

    
3297
        /* parse the year-month-day part */
3298
        for (i = 0; i < FF_ARRAY_ELEMS(date_fmt); i++) {
3299
            q = small_strptime(p, date_fmt[i], &dt);
3300
            if (q) {
3301
                break;
3302
            }
3303
        }
3304

    
3305
        /* if the year-month-day part is missing, then take the
3306
         * current year-month-day time */
3307
        if (!q) {
3308
            if (is_utc) {
3309
                dt = *gmtime(&now);
3310
            } else {
3311
                dt = *localtime(&now);
3312
            }
3313
            dt.tm_hour = dt.tm_min = dt.tm_sec = 0;
3314
        } else {
3315
            p = q;
3316
        }
3317

    
3318
        if (*p == 'T' || *p == 't' || *p == ' ')
3319
            p++;
3320

    
3321
        /* parse the hour-minute-second part */
3322
        for (i = 0; i < FF_ARRAY_ELEMS(time_fmt); i++) {
3323
            q = small_strptime(p, time_fmt[i], &dt);
3324
            if (q) {
3325
                break;
3326
            }
3327
        }
3328
    } else {
3329
        /* parse datestr as a duration */
3330
        if (p[0] == '-') {
3331
            negative = 1;
3332
            ++p;
3333
        }
3334
        /* parse datestr as HH:MM:SS */
3335
        q = small_strptime(p, time_fmt[0], &dt);
3336
        if (!q) {
3337
            /* parse datestr as S+ */
3338
            dt.tm_sec = strtol(p, (char **)&q, 10);
3339
            if (q == p)
3340
                /* the parsing didn't succeed */
3341
                return INT64_MIN;
3342
            dt.tm_min = 0;
3343
            dt.tm_hour = 0;
3344
        }
3345
    }
3346

    
3347
    /* Now we have all the fields that we can get */
3348
    if (!q) {
3349
        return INT64_MIN;
3350
    }
3351

    
3352
    if (duration) {
3353
        t = dt.tm_hour * 3600 + dt.tm_min * 60 + dt.tm_sec;
3354
    } else {
3355
        dt.tm_isdst = -1;       /* unknown */
3356
        if (is_utc) {
3357
            t = mktimegm(&dt);
3358
        } else {
3359
            t = mktime(&dt);
3360
        }
3361
    }
3362

    
3363
    t *= 1000000;
3364

    
3365
    /* parse the .m... part */
3366
    if (*q == '.') {
3367
        int val, n;
3368
        q++;
3369
        for (val = 0, n = 100000; n >= 1; n /= 10, q++) {
3370
            if (!isdigit(*q))
3371
                break;
3372
            val += n * (*q - '0');
3373
        }
3374
        t += val;
3375
    }
3376
    return negative ? -t : t;
3377
}
3378

    
3379
int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info)
3380
{
3381
    const char *p;
3382
    char tag[128], *q;
3383

    
3384
    p = info;
3385
    if (*p == '?')
3386
        p++;
3387
    for(;;) {
3388
        q = tag;
3389
        while (*p != '\0' && *p != '=' && *p != '&') {
3390
            if ((q - tag) < sizeof(tag) - 1)
3391
                *q++ = *p;
3392
            p++;
3393
        }
3394
        *q = '\0';
3395
        q = arg;
3396
        if (*p == '=') {
3397
            p++;
3398
            while (*p != '&' && *p != '\0') {
3399
                if ((q - arg) < arg_size - 1) {
3400
                    if (*p == '+')
3401
                        *q++ = ' ';
3402
                    else
3403
                        *q++ = *p;
3404
                }
3405
                p++;
3406
            }
3407
        }
3408
        *q = '\0';
3409
        if (!strcmp(tag, tag1))
3410
            return 1;
3411
        if (*p != '&')
3412
            break;
3413
        p++;
3414
    }
3415
    return 0;
3416
}
3417

    
3418
int av_get_frame_filename(char *buf, int buf_size,
3419
                          const char *path, int number)
3420
{
3421
    const char *p;
3422
    char *q, buf1[20], c;
3423
    int nd, len, percentd_found;
3424

    
3425
    q = buf;
3426
    p = path;
3427
    percentd_found = 0;
3428
    for(;;) {
3429
        c = *p++;
3430
        if (c == '\0')
3431
            break;
3432
        if (c == '%') {
3433
            do {
3434
                nd = 0;
3435
                while (isdigit(*p)) {
3436
                    nd = nd * 10 + *p++ - '0';
3437
                }
3438
                c = *p++;
3439
            } while (isdigit(c));
3440

    
3441
            switch(c) {
3442
            case '%':
3443
                goto addchar;
3444
            case 'd':
3445
                if (percentd_found)
3446
                    goto fail;
3447
                percentd_found = 1;
3448
                snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
3449
                len = strlen(buf1);
3450
                if ((q - buf + len) > buf_size - 1)
3451
                    goto fail;
3452
                memcpy(q, buf1, len);
3453
                q += len;
3454
                break;
3455
            default:
3456
                goto fail;
3457
            }
3458
        } else {
3459
        addchar:
3460
            if ((q - buf) < buf_size - 1)
3461
                *q++ = c;
3462
        }
3463
    }
3464
    if (!percentd_found)
3465
        goto fail;
3466
    *q = '\0';
3467
    return 0;
3468
 fail:
3469
    *q = '\0';
3470
    return -1;
3471
}
3472

    
3473
static void hex_dump_internal(void *avcl, FILE *f, int level, uint8_t *buf, int size)
3474
{
3475
    int len, i, j, c;
3476
#undef fprintf
3477
#define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3478

    
3479
    for(i=0;i<size;i+=16) {
3480
        len = size - i;
3481
        if (len > 16)
3482
            len = 16;
3483
        PRINT("%08x ", i);
3484
        for(j=0;j<16;j++) {
3485
            if (j < len)
3486
                PRINT(" %02x", buf[i+j]);
3487
            else
3488
                PRINT("   ");
3489
        }
3490
        PRINT(" ");
3491
        for(j=0;j<len;j++) {
3492
            c = buf[i+j];
3493
            if (c < ' ' || c > '~')
3494
                c = '.';
3495
            PRINT("%c", c);
3496
        }
3497
        PRINT("\n");
3498
    }
3499
#undef PRINT
3500
}
3501

    
3502
void av_hex_dump(FILE *f, uint8_t *buf, int size)
3503
{
3504
    hex_dump_internal(NULL, f, 0, buf, size);
3505
}
3506

    
3507
void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size)
3508
{
3509
    hex_dump_internal(avcl, NULL, level, buf, size);
3510
}
3511

    
3512
 //FIXME needs to know the time_base
3513
static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload)
3514
{
3515
#undef fprintf
3516
#define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3517
    PRINT("stream #%d:\n", pkt->stream_index);
3518
    PRINT("  keyframe=%d\n", ((pkt->flags & AV_PKT_FLAG_KEY) != 0));
3519
    PRINT("  duration=%0.3f\n", (double)pkt->duration / AV_TIME_BASE);
3520
    /* DTS is _always_ valid after av_read_frame() */
3521
    PRINT("  dts=");
3522
    if (pkt->dts == AV_NOPTS_VALUE)
3523
        PRINT("N/A");
3524
    else
3525
        PRINT("%0.3f", (double)pkt->dts / AV_TIME_BASE);
3526
    /* PTS may not be known if B-frames are present. */
3527
    PRINT("  pts=");
3528
    if (pkt->pts == AV_NOPTS_VALUE)
3529
        PRINT("N/A");
3530
    else
3531
        PRINT("%0.3f", (double)pkt->pts / AV_TIME_BASE);
3532
    PRINT("\n");
3533
    PRINT("  size=%d\n", pkt->size);
3534
#undef PRINT
3535
    if (dump_payload)
3536
        av_hex_dump(f, pkt->data, pkt->size);
3537
}
3538

    
3539
void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload)
3540
{
3541
    pkt_dump_internal(NULL, f, 0, pkt, dump_payload);
3542
}
3543

    
3544
void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload)
3545
{
3546
    pkt_dump_internal(avcl, NULL, level, pkt, dump_payload);
3547
}
3548

    
3549
#if FF_API_URL_SPLIT
3550
attribute_deprecated
3551
void ff_url_split(char *proto, int proto_size,
3552
                  char *authorization, int authorization_size,
3553
                  char *hostname, int hostname_size,
3554
                  int *port_ptr,
3555
                  char *path, int path_size,
3556
                  const char *url)
3557
{
3558
    av_url_split(proto, proto_size,
3559
                 authorization, authorization_size,
3560
                 hostname, hostname_size,
3561
                 port_ptr,
3562
                 path, path_size,
3563
                 url);
3564
}
3565
#endif
3566

    
3567
void av_url_split(char *proto, int proto_size,
3568
                  char *authorization, int authorization_size,
3569
                  char *hostname, int hostname_size,
3570
                  int *port_ptr,
3571
                  char *path, int path_size,
3572
                  const char *url)
3573
{
3574
    const char *p, *ls, *at, *col, *brk;
3575

    
3576
    if (port_ptr)               *port_ptr = -1;
3577
    if (proto_size > 0)         proto[0] = 0;
3578
    if (authorization_size > 0) authorization[0] = 0;
3579
    if (hostname_size > 0)      hostname[0] = 0;
3580
    if (path_size > 0)          path[0] = 0;
3581

    
3582
    /* parse protocol */
3583
    if ((p = strchr(url, ':'))) {
3584
        av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
3585
        p++; /* skip ':' */
3586
        if (*p == '/') p++;
3587
        if (*p == '/') p++;
3588
    } else {
3589
        /* no protocol means plain filename */
3590
        av_strlcpy(path, url, path_size);
3591
        return;
3592
    }
3593

    
3594
    /* separate path from hostname */
3595
    ls = strchr(p, '/');
3596
    if(!ls)
3597
        ls = strchr(p, '?');
3598
    if(ls)
3599
        av_strlcpy(path, ls, path_size);
3600
    else
3601
        ls = &p[strlen(p)]; // XXX
3602

    
3603
    /* the rest is hostname, use that to parse auth/port */
3604
    if (ls != p) {
3605
        /* authorization (user[:pass]@hostname) */
3606
        if ((at = strchr(p, '@')) && at < ls) {
3607
            av_strlcpy(authorization, p,
3608
                       FFMIN(authorization_size, at + 1 - p));
3609
            p = at + 1; /* skip '@' */
3610
        }
3611

    
3612
        if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
3613
            /* [host]:port */
3614
            av_strlcpy(hostname, p + 1,
3615
                       FFMIN(hostname_size, brk - p));
3616
            if (brk[1] == ':' && port_ptr)
3617
                *port_ptr = atoi(brk + 2);
3618
        } else if ((col = strchr(p, ':')) && col < ls) {
3619
            av_strlcpy(hostname, p,
3620
                       FFMIN(col + 1 - p, hostname_size));
3621
            if (port_ptr) *port_ptr = atoi(col + 1);
3622
        } else
3623
            av_strlcpy(hostname, p,
3624
                       FFMIN(ls + 1 - p, hostname_size));
3625
    }
3626
}
3627

    
3628
char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
3629
{
3630
    int i;
3631
    static const char hex_table_uc[16] = { '0', '1', '2', '3',
3632
                                           '4', '5', '6', '7',
3633
                                           '8', '9', 'A', 'B',
3634
                                           'C', 'D', 'E', 'F' };
3635
    static const char hex_table_lc[16] = { '0', '1', '2', '3',
3636
                                           '4', '5', '6', '7',
3637
                                           '8', '9', 'a', 'b',
3638
                                           'c', 'd', 'e', 'f' };
3639
    const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
3640

    
3641
    for(i = 0; i < s; i++) {
3642
        buff[i * 2]     = hex_table[src[i] >> 4];
3643
        buff[i * 2 + 1] = hex_table[src[i] & 0xF];
3644
    }
3645

    
3646
    return buff;
3647
}
3648

    
3649
int ff_hex_to_data(uint8_t *data, const char *p)
3650
{
3651
    int c, len, v;
3652

    
3653
    len = 0;
3654
    v = 1;
3655
    for (;;) {
3656
        p += strspn(p, SPACE_CHARS);
3657
        if (*p == '\0')
3658
            break;
3659
        c = toupper((unsigned char) *p++);
3660
        if (c >= '0' && c <= '9')
3661
            c = c - '0';
3662
        else if (c >= 'A' && c <= 'F')
3663
            c = c - 'A' + 10;
3664
        else
3665
            break;
3666
        v = (v << 4) | c;
3667
        if (v & 0x100) {
3668
            if (data)
3669
                data[len] = v;
3670
            len++;
3671
            v = 1;
3672
        }
3673
    }
3674
    return len;
3675
}
3676

    
3677
void av_set_pts_info(AVStream *s, int pts_wrap_bits,
3678
                     unsigned int pts_num, unsigned int pts_den)
3679
{
3680
    s->pts_wrap_bits = pts_wrap_bits;
3681

    
3682
    if(av_reduce(&s->time_base.num, &s->time_base.den, pts_num, pts_den, INT_MAX)){
3683
        if(s->time_base.num != pts_num)
3684
            av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, pts_num/s->time_base.num);
3685
    }else
3686
        av_log(NULL, AV_LOG_WARNING, "st:%d has too large timebase, reducing\n", s->index);
3687

    
3688
    if(!s->time_base.num || !s->time_base.den)
3689
        s->time_base.num= s->time_base.den= 0;
3690
}
3691

    
3692
int ff_url_join(char *str, int size, const char *proto,
3693
                const char *authorization, const char *hostname,
3694
                int port, const char *fmt, ...)
3695
{
3696
#if CONFIG_NETWORK
3697
    struct addrinfo hints, *ai;
3698
#endif
3699

    
3700
    str[0] = '\0';
3701
    if (proto)
3702
        av_strlcatf(str, size, "%s://", proto);
3703
    if (authorization && authorization[0])
3704
        av_strlcatf(str, size, "%s@", authorization);
3705
#if CONFIG_NETWORK && defined(AF_INET6)
3706
    /* Determine if hostname is a numerical IPv6 address,
3707
     * properly escape it within [] in that case. */
3708
    memset(&hints, 0, sizeof(hints));
3709
    hints.ai_flags = AI_NUMERICHOST;
3710
    if (!getaddrinfo(hostname, NULL, &hints, &ai)) {
3711
        if (ai->ai_family == AF_INET6) {
3712
            av_strlcat(str, "[", size);
3713
            av_strlcat(str, hostname, size);
3714
            av_strlcat(str, "]", size);
3715
        } else {
3716
            av_strlcat(str, hostname, size);
3717
        }
3718
        freeaddrinfo(ai);
3719
    } else
3720
#endif
3721
        /* Not an IPv6 address, just output the plain string. */
3722
        av_strlcat(str, hostname, size);
3723

    
3724
    if (port >= 0)
3725
        av_strlcatf(str, size, ":%d", port);
3726
    if (fmt) {
3727
        va_list vl;
3728
        int len = strlen(str);
3729

    
3730
        va_start(vl, fmt);
3731
        vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);
3732
        va_end(vl);
3733
    }
3734
    return strlen(str);
3735
}
3736

    
3737
int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
3738
                     AVFormatContext *src)
3739
{
3740
    AVPacket local_pkt;
3741

    
3742
    local_pkt = *pkt;
3743
    local_pkt.stream_index = dst_stream;
3744
    if (pkt->pts != AV_NOPTS_VALUE)
3745
        local_pkt.pts = av_rescale_q(pkt->pts,
3746
                                     src->streams[pkt->stream_index]->time_base,
3747
                                     dst->streams[dst_stream]->time_base);
3748
    if (pkt->dts != AV_NOPTS_VALUE)
3749
        local_pkt.dts = av_rescale_q(pkt->dts,
3750
                                     src->streams[pkt->stream_index]->time_base,
3751
                                     dst->streams[dst_stream]->time_base);
3752
    return av_write_frame(dst, &local_pkt);
3753
}
3754

    
3755
void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
3756
                        void *context)
3757
{
3758
    const char *ptr = str;
3759

    
3760
    /* Parse key=value pairs. */
3761
    for (;;) {
3762
        const char *key;
3763
        char *dest = NULL, *dest_end;
3764
        int key_len, dest_len = 0;
3765

    
3766
        /* Skip whitespace and potential commas. */
3767
        while (*ptr && (isspace(*ptr) || *ptr == ','))
3768
            ptr++;
3769
        if (!*ptr)
3770
            break;
3771

    
3772
        key = ptr;
3773

    
3774
        if (!(ptr = strchr(key, '=')))
3775
            break;
3776
        ptr++;
3777
        key_len = ptr - key;
3778

    
3779
        callback_get_buf(context, key, key_len, &dest, &dest_len);
3780
        dest_end = dest + dest_len - 1;
3781

    
3782
        if (*ptr == '\"') {
3783
            ptr++;
3784
            while (*ptr && *ptr != '\"') {
3785
                if (*ptr == '\\') {
3786
                    if (!ptr[1])
3787
                        break;
3788
                    if (dest && dest < dest_end)
3789
                        *dest++ = ptr[1];
3790
                    ptr += 2;
3791
                } else {
3792
                    if (dest && dest < dest_end)
3793
                        *dest++ = *ptr;
3794
                    ptr++;
3795
                }
3796
            }
3797
            if (*ptr == '\"')
3798
                ptr++;
3799
        } else {
3800
            for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++)
3801
                if (dest && dest < dest_end)
3802
                    *dest++ = *ptr;
3803
        }
3804
        if (dest)
3805
            *dest = 0;
3806
    }
3807
}
3808