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ffmpeg / libavformat / utils.c @ 2f35beae

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1 de6d9b64 Fabrice Bellard
/*
2 a85736f2 Diego Biurrun
 * various utility functions for use within FFmpeg
3 19720f15 Fabrice Bellard
 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
4 de6d9b64 Fabrice Bellard
 *
5 b78e7197 Diego Biurrun
 * This file is part of FFmpeg.
6
 *
7
 * FFmpeg is free software; you can redistribute it and/or
8 19720f15 Fabrice Bellard
 * modify it under the terms of the GNU Lesser General Public
9
 * License as published by the Free Software Foundation; either
10 b78e7197 Diego Biurrun
 * version 2.1 of the License, or (at your option) any later version.
11 de6d9b64 Fabrice Bellard
 *
12 b78e7197 Diego Biurrun
 * FFmpeg is distributed in the hope that it will be useful,
13 de6d9b64 Fabrice Bellard
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 19720f15 Fabrice Bellard
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
 * Lesser General Public License for more details.
16 de6d9b64 Fabrice Bellard
 *
17 19720f15 Fabrice Bellard
 * You should have received a copy of the GNU Lesser General Public
18 b78e7197 Diego Biurrun
 * License along with FFmpeg; if not, write to the Free Software
19 5509bffa Diego Biurrun
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 de6d9b64 Fabrice Bellard
 */
21 8be1c656 Fabrice Bellard
#include "avformat.h"
22 f1c80e35 Ronald S. Bultje
#include "internal.h"
23 603a5f04 Francesco Lavra
#include "libavcodec/internal.h"
24 6ed04040 Michael Niedermayer
#include "libavutil/opt.h"
25 06a7bd9a Michael Niedermayer
#include "metadata.h"
26 6612d8cf Reimar Döffinger
#include "id3v2.h"
27 245976da Diego Biurrun
#include "libavutil/avstring.h"
28 45da8124 Aurelien Jacobs
#include "riff.h"
29 c26e58e3 Måns Rullgård
#include "audiointerleave.h"
30 82e4ac2c Ramiro Polla
#include <sys/time.h>
31
#include <time.h>
32 ea452b54 Aurelien Jacobs
#include <strings.h>
33 780d7897 Martin Storsjö
#include <stdarg.h>
34
#if CONFIG_NETWORK
35
#include "network.h"
36
#endif
37 c5510dd6 Philip Gladstone
38 b754978a Michael Niedermayer
#undef NDEBUG
39
#include <assert.h>
40
41 e36bdf8b Daniel Kristjansson
/**
42 ba87f080 Diego Biurrun
 * @file
43 a85736f2 Diego Biurrun
 * various utility functions for use within FFmpeg
44 e36bdf8b Daniel Kristjansson
 */
45
46 c97429e2 Stefano Sabatini
unsigned avformat_version(void)
47
{
48
    return LIBAVFORMAT_VERSION_INT;
49
}
50
51 41600690 Stefano Sabatini
const char *avformat_configuration(void)
52 c1736936 Diego Biurrun
{
53
    return FFMPEG_CONFIGURATION;
54
}
55
56 41600690 Stefano Sabatini
const char *avformat_license(void)
57 c1736936 Diego Biurrun
{
58
#define LICENSE_PREFIX "libavformat license: "
59
    return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
60
}
61
62 8163c870 Stefano Sabatini
/* 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 f3a30e3a Luca Barbato
112 a85736f2 Diego Biurrun
/** head of registered input format linked list */
113 114c9a59 Aurelien Jacobs
#if !FF_API_FIRST_FORMAT
114
static
115
#endif
116 8b69867f Michael Niedermayer
AVInputFormat *first_iformat = NULL;
117 a85736f2 Diego Biurrun
/** head of registered output format linked list */
118 114c9a59 Aurelien Jacobs
#if !FF_API_FIRST_FORMAT
119
static
120
#endif
121 8b69867f Michael Niedermayer
AVOutputFormat *first_oformat = NULL;
122 de6d9b64 Fabrice Bellard
123 84be6e72 Michael Niedermayer
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 b9a281db Fabrice Bellard
void av_register_input_format(AVInputFormat *format)
136 de6d9b64 Fabrice Bellard
{
137 b9a281db Fabrice Bellard
    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 de6d9b64 Fabrice Bellard
    while (*p != NULL) p = &(*p)->next;
149
    *p = format;
150
    format->next = NULL;
151
}
152
153 8eb631fa Stefano Sabatini
int av_match_ext(const char *filename, const char *extensions)
154
{
155 de6d9b64 Fabrice Bellard
    const char *ext, *p;
156
    char ext1[32], *q;
157
158 293ed23f Michael Niedermayer
    if(!filename)
159
        return 0;
160 115329f1 Diego Biurrun
161 de6d9b64 Fabrice Bellard
    ext = strrchr(filename, '.');
162
    if (ext) {
163
        ext++;
164
        p = extensions;
165
        for(;;) {
166
            q = ext1;
167 115329f1 Diego Biurrun
            while (*p != '\0' && *p != ',' && q-ext1<sizeof(ext1)-1)
168 de6d9b64 Fabrice Bellard
                *q++ = *p++;
169
            *q = '\0';
170 115329f1 Diego Biurrun
            if (!strcasecmp(ext1, ext))
171 de6d9b64 Fabrice Bellard
                return 1;
172 115329f1 Diego Biurrun
            if (*p == '\0')
173 de6d9b64 Fabrice Bellard
                break;
174
            p++;
175
        }
176
    }
177
    return 0;
178
}
179
180 2323ac01 Baptiste Coudurier
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 198ac67f Aurelien Jacobs
#if FF_API_GUESS_FORMAT
199 115329f1 Diego Biurrun
AVOutputFormat *guess_format(const char *short_name, const char *filename,
200 b9a281db Fabrice Bellard
                             const char *mime_type)
201 de6d9b64 Fabrice Bellard
{
202 a1f547b9 Stefano Sabatini
    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 27323146 Anton Khirnov
    AVOutputFormat *fmt = NULL, *fmt_found;
210 de6d9b64 Fabrice Bellard
    int score_max, score;
211
212 87a0a681 Fabrice Bellard
    /* specific test for image sequences */
213 b250f9c6 Aurelien Jacobs
#if CONFIG_IMAGE2_MUXER
214 115329f1 Diego Biurrun
    if (!short_name && filename &&
215 5c07cf53 Michel Bardiaux
        av_filename_number_test(filename) &&
216 5b6d5596 Michael Niedermayer
        av_guess_image2_codec(filename) != CODEC_ID_NONE) {
217 0f52ef1a Stefano Sabatini
        return av_guess_format("image2", NULL, NULL);
218 5b6d5596 Michael Niedermayer
    }
219 ff70e601 Måns Rullgård
#endif
220 a85736f2 Diego Biurrun
    /* Find the proper file type. */
221 de6d9b64 Fabrice Bellard
    fmt_found = NULL;
222
    score_max = 0;
223 27323146 Anton Khirnov
    while ((fmt = av_oformat_next(fmt))) {
224 de6d9b64 Fabrice Bellard
        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 115329f1 Diego Biurrun
        if (filename && fmt->extensions &&
230 aa13b573 Stefano Sabatini
            av_match_ext(filename, fmt->extensions)) {
231 de6d9b64 Fabrice Bellard
            score += 5;
232
        }
233
        if (score > score_max) {
234
            score_max = score;
235
            fmt_found = fmt;
236
        }
237
    }
238
    return fmt_found;
239 115329f1 Diego Biurrun
}
240 de6d9b64 Fabrice Bellard
241 198ac67f Aurelien Jacobs
#if FF_API_GUESS_FORMAT
242 115329f1 Diego Biurrun
AVOutputFormat *guess_stream_format(const char *short_name, const char *filename,
243 c5510dd6 Philip Gladstone
                             const char *mime_type)
244
{
245 0f52ef1a Stefano Sabatini
    AVOutputFormat *fmt = av_guess_format(short_name, filename, mime_type);
246 c5510dd6 Philip Gladstone
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 0f52ef1a Stefano Sabatini
        stream_fmt = av_guess_format(stream_format_name, NULL, NULL);
253 c5510dd6 Philip Gladstone
254
        if (stream_fmt)
255
            fmt = stream_fmt;
256
    }
257
258
    return fmt;
259
}
260 1642ee43 Stefano Sabatini
#endif
261 c5510dd6 Philip Gladstone
262 115329f1 Diego Biurrun
enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
263 72415b2a Stefano Sabatini
                            const char *filename, const char *mime_type, enum AVMediaType type){
264
    if(type == AVMEDIA_TYPE_VIDEO){
265 5b6d5596 Michael Niedermayer
        enum CodecID codec_id= CODEC_ID_NONE;
266
267 b250f9c6 Aurelien Jacobs
#if CONFIG_IMAGE2_MUXER
268 ae214ac3 Michael Niedermayer
        if(!strcmp(fmt->name, "image2") || !strcmp(fmt->name, "image2pipe")){
269 5b6d5596 Michael Niedermayer
            codec_id= av_guess_image2_codec(filename);
270
        }
271 ff70e601 Måns Rullgård
#endif
272 5b6d5596 Michael Niedermayer
        if(codec_id == CODEC_ID_NONE)
273
            codec_id= fmt->video_codec;
274
        return codec_id;
275 72415b2a Stefano Sabatini
    }else if(type == AVMEDIA_TYPE_AUDIO)
276 5b6d5596 Michael Niedermayer
        return fmt->audio_codec;
277 118ccae0 Aurelien Jacobs
    else if (type == AVMEDIA_TYPE_SUBTITLE)
278
        return fmt->subtitle_codec;
279 5b6d5596 Michael Niedermayer
    else
280
        return CODEC_ID_NONE;
281
}
282
283 b9a281db Fabrice Bellard
AVInputFormat *av_find_input_format(const char *short_name)
284
{
285 27323146 Anton Khirnov
    AVInputFormat *fmt = NULL;
286
    while ((fmt = av_iformat_next(fmt))) {
287 2323ac01 Baptiste Coudurier
        if (match_format(short_name, fmt->name))
288 b9a281db Fabrice Bellard
            return fmt;
289
    }
290
    return NULL;
291
}
292
293 13728334 Aurelien Jacobs
#if FF_API_SYMVER && CONFIG_SHARED && HAVE_SYMVER
294 b462d132 Måns Rullgård
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 de6d9b64 Fabrice Bellard
304 b462d132 Måns Rullgård
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 de6d9b64 Fabrice Bellard
326 2692067a Michael Niedermayer
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 feb993e5 Reimar Döffinger
        av_shrink_packet(pkt, ret);
340 2692067a Michael Niedermayer
341
    return ret;
342
}
343
344 6bfc2683 Reimar Döffinger
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 fb2758c8 Fabrice Bellard
360 5c07cf53 Michel Bardiaux
int av_filename_number_test(const char *filename)
361 b9a281db Fabrice Bellard
{
362
    char buf[1024];
363 5c07cf53 Michel Bardiaux
    return filename && (av_get_frame_filename(buf, sizeof(buf), filename, 1)>=0);
364 b9a281db Fabrice Bellard
}
365
366 8e2ee182 Reimar Döffinger
AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max)
367 b9a281db Fabrice Bellard
{
368 6612d8cf Reimar Döffinger
    AVProbeData lpd = *pd;
369 27323146 Anton Khirnov
    AVInputFormat *fmt1 = NULL, *fmt;
370 79750486 Michael Niedermayer
    int score;
371 b9a281db Fabrice Bellard
372 6612d8cf Reimar Döffinger
    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 b9a281db Fabrice Bellard
    fmt = NULL;
381 27323146 Anton Khirnov
    while ((fmt1 = av_iformat_next(fmt1))) {
382 b8e705ec Reimar Döffinger
        if (!is_opened == !(fmt1->flags & AVFMT_NOFILE))
383 b9a281db Fabrice Bellard
            continue;
384
        score = 0;
385 a8dbe951 Philip Gladstone
        if (fmt1->read_probe) {
386 6612d8cf Reimar Döffinger
            score = fmt1->read_probe(&lpd);
387 a8dbe951 Philip Gladstone
        } else if (fmt1->extensions) {
388 6612d8cf Reimar Döffinger
            if (av_match_ext(lpd.filename, fmt1->extensions)) {
389 b9a281db Fabrice Bellard
                score = 50;
390
            }
391 115329f1 Diego Biurrun
        }
392 79750486 Michael Niedermayer
        if (score > *score_max) {
393
            *score_max = score;
394 b9a281db Fabrice Bellard
            fmt = fmt1;
395 4b3cca36 Michael Niedermayer
        }else if (score == *score_max)
396
            fmt = NULL;
397 b9a281db Fabrice Bellard
    }
398
    return fmt;
399
}
400
401 79750486 Michael Niedermayer
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 db46c4e1 Baptiste Coudurier
static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st, AVProbeData *pd, int score)
407 64cd3108 Michael Niedermayer
{
408 cf5b33d9 Stefano Sabatini
    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 64cd3108 Michael Niedermayer
423
    if (fmt) {
424 cf5b33d9 Stefano Sabatini
        int i;
425 db46c4e1 Baptiste Coudurier
        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 cf5b33d9 Stefano Sabatini
        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 f1588ed5 Andreas Öman
        }
434 64cd3108 Michael Niedermayer
    }
435
    return !!fmt;
436
}
437
438 b9a281db Fabrice Bellard
/************************************************************/
439
/* input media file */
440 96baaa6a Fabrice Bellard
441 da24c5e3 Fabrice Bellard
/**
442 e36bdf8b Daniel Kristjansson
 * Open a media file from an IO stream. 'fmt' must be specified.
443 da24c5e3 Fabrice Bellard
 */
444 115329f1 Diego Biurrun
int av_open_input_stream(AVFormatContext **ic_ptr,
445
                         ByteIOContext *pb, const char *filename,
446 da24c5e3 Fabrice Bellard
                         AVInputFormat *fmt, AVFormatParameters *ap)
447
{
448
    int err;
449
    AVFormatContext *ic;
450 c04c3282 Michael Niedermayer
    AVFormatParameters default_ap;
451
452
    if(!ap){
453
        ap=&default_ap;
454
        memset(ap, 0, sizeof(default_ap));
455
    }
456 da24c5e3 Fabrice Bellard
457 4eb72c6b Nico Sabbi
    if(!ap->prealloced_context)
458 8e2fd8e1 Stefano Sabatini
        ic = avformat_alloc_context();
459 4eb72c6b Nico Sabbi
    else
460
        ic = *ic_ptr;
461 da24c5e3 Fabrice Bellard
    if (!ic) {
462 769e10f0 Panagiotis Issaris
        err = AVERROR(ENOMEM);
463 da24c5e3 Fabrice Bellard
        goto fail;
464
    }
465
    ic->iformat = fmt;
466 899681cd Björn Axelsson
    ic->pb = pb;
467 da24c5e3 Fabrice Bellard
    ic->duration = AV_NOPTS_VALUE;
468
    ic->start_time = AV_NOPTS_VALUE;
469 75e61b0e Måns Rullgård
    av_strlcpy(ic->filename, filename, sizeof(ic->filename));
470 da24c5e3 Fabrice Bellard
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 769e10f0 Panagiotis Issaris
            err = AVERROR(ENOMEM);
476 da24c5e3 Fabrice Bellard
            goto fail;
477
        }
478
    } else {
479
        ic->priv_data = NULL;
480
    }
481
482 6612d8cf Reimar Döffinger
    // e.g. AVFMT_NOFILE formats will not have a ByteIOContext
483
    if (ic->pb)
484
        ff_id3v2_read(ic, ID3v2_DEFAULT_MAGIC);
485
486 e145ce20 Ronald S. Bultje
    if (ic->iformat->read_header) {
487 1e2802c5 Ronald S. Bultje
        err = ic->iformat->read_header(ic, ap);
488
        if (err < 0)
489
            goto fail;
490 e145ce20 Ronald S. Bultje
    }
491 fb2758c8 Fabrice Bellard
492 faf7cbf1 Michael Niedermayer
    if (pb && !ic->data_offset)
493 899681cd Björn Axelsson
        ic->data_offset = url_ftell(ic->pb);
494 fb2758c8 Fabrice Bellard
495 54036be1 Aurelien Jacobs
#if FF_API_OLD_METADATA
496 e99f76ab Aurelien Jacobs
    ff_metadata_demux_compat(ic);
497
#endif
498
499 af122d6a Baptiste Coudurier
    ic->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
500
501 da24c5e3 Fabrice Bellard
    *ic_ptr = ic;
502
    return 0;
503
 fail:
504
    if (ic) {
505 ccafd472 Baptiste Coudurier
        int i;
506 da24c5e3 Fabrice Bellard
        av_freep(&ic->priv_data);
507 ccafd472 Baptiste Coudurier
        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 ec973f45 Przemysław Sobala
                av_free(st->codec);
513 fd0368e7 Aurelien Jacobs
                av_free(st->info);
514 ccafd472 Baptiste Coudurier
            }
515
            av_free(st);
516
        }
517 da24c5e3 Fabrice Bellard
    }
518
    av_free(ic);
519
    *ic_ptr = NULL;
520
    return err;
521
}
522
523 a85736f2 Diego Biurrun
/** size of probe buffer, for guessing file type from file contents */
524 a877eedc Michael Niedermayer
#define PROBE_BUF_MIN 2048
525 329b1e75 Michael Niedermayer
#define PROBE_BUF_MAX (1<<20)
526 b9a281db Fabrice Bellard
527 eadd495d Micah F. Galizia
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 532aa889 Micah F. Galizia
    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 eadd495d Micah F. Galizia
        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 c7f625ee Måns Rullgård
            ret = 0;            /* error was end of file, nothing read */
566 eadd495d Micah F. Galizia
        }
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 532aa889 Micah F. Galizia
    if (!*fmt) {
583 01d91b9b Tomas Härdin
        av_free(buf);
584 532aa889 Micah F. Galizia
        return AVERROR_INVALIDDATA;
585
    }
586
587 01d91b9b Tomas Härdin
    /* 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 eadd495d Micah F. Galizia
591 01d91b9b Tomas Härdin
    return ret;
592 eadd495d Micah F. Galizia
}
593
594 115329f1 Diego Biurrun
int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
595 b9a281db Fabrice Bellard
                       AVInputFormat *fmt,
596
                       int buf_size,
597
                       AVFormatParameters *ap)
598 de6d9b64 Fabrice Bellard
{
599 eadd495d Micah F. Galizia
    int err;
600 b9a281db Fabrice Bellard
    AVProbeData probe_data, *pd = &probe_data;
601 17acc63a Reimar Döffinger
    ByteIOContext *pb = NULL;
602 e9b06816 Michael Niedermayer
    void *logctx= ap && ap->prealloced_context ? *ic_ptr : NULL;
603 115329f1 Diego Biurrun
604 da24c5e3 Fabrice Bellard
    pd->filename = "";
605
    if (filename)
606
        pd->filename = filename;
607 a877eedc Michael Niedermayer
    pd->buf = NULL;
608 b9a281db Fabrice Bellard
    pd->buf_size = 0;
609
610
    if (!fmt) {
611 a85736f2 Diego Biurrun
        /* guess format if no file can be opened */
612 a25e098d Fabrice Bellard
        fmt = av_probe_input_format(pd, 0);
613 de6d9b64 Fabrice Bellard
    }
614
615 a85736f2 Diego Biurrun
    /* Do not open file if the format does not need it. XXX: specific
616 b6892136 Fabrice Bellard
       hack needed to handle RTSP/TCP */
617 17acc63a Reimar Döffinger
    if (!fmt || !(fmt->flags & AVFMT_NOFILE)) {
618 87a0a681 Fabrice Bellard
        /* if no file needed do not try to open one */
619 899681cd Björn Axelsson
        if ((err=url_fopen(&pb, filename, URL_RDONLY)) < 0) {
620 96baaa6a Fabrice Bellard
            goto fail;
621 b9a281db Fabrice Bellard
        }
622 96baaa6a Fabrice Bellard
        if (buf_size > 0) {
623 da24c5e3 Fabrice Bellard
            url_setbufsize(pb, buf_size);
624 96baaa6a Fabrice Bellard
        }
625 2898526d Jean-Daniel Dupas
        if (!fmt && (err = ff_probe_input_buffer(&pb, &fmt, filename, logctx, 0, logctx ? (*ic_ptr)->probesize : 0)) < 0) {
626 eadd495d Micah F. Galizia
            goto fail;
627 5b25dfa7 Fabrice Bellard
        }
628 b9a281db Fabrice Bellard
    }
629
630
    /* if still no format found, error */
631
    if (!fmt) {
632 2928b83c Stefano Sabatini
        err = AVERROR_INVALIDDATA;
633 da24c5e3 Fabrice Bellard
        goto fail;
634 de6d9b64 Fabrice Bellard
    }
635 115329f1 Diego Biurrun
636 a85736f2 Diego Biurrun
    /* check filename in case an image number is expected */
637 da24c5e3 Fabrice Bellard
    if (fmt->flags & AVFMT_NEEDNUMBER) {
638 5c07cf53 Michel Bardiaux
        if (!av_filename_number_test(filename)) {
639 87a0a681 Fabrice Bellard
            err = AVERROR_NUMEXPECTED;
640 da24c5e3 Fabrice Bellard
            goto fail;
641 87a0a681 Fabrice Bellard
        }
642
    }
643 da24c5e3 Fabrice Bellard
    err = av_open_input_stream(ic_ptr, pb, filename, fmt, ap);
644
    if (err)
645
        goto fail;
646 b9a281db Fabrice Bellard
    return 0;
647 de6d9b64 Fabrice Bellard
 fail:
648 a877eedc Michael Niedermayer
    av_freep(&pd->buf);
649 17acc63a Reimar Döffinger
    if (pb)
650 da24c5e3 Fabrice Bellard
        url_fclose(pb);
651 ebb82604 Art Clarke
    if (ap && ap->prealloced_context)
652
        av_free(*ic_ptr);
653
    *ic_ptr = NULL;
654 b9a281db Fabrice Bellard
    return err;
655 115329f1 Diego Biurrun
656 de6d9b64 Fabrice Bellard
}
657
658 da24c5e3 Fabrice Bellard
/*******************************************************/
659
660 5c5b1731 Måns Rullgård
static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
661
                               AVPacketList **plast_pktl){
662
    AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
663 9d3b9f2c Michael Niedermayer
    if (!pktl)
664
        return NULL;
665
666 5c5b1731 Måns Rullgård
    if (*packet_buffer)
667
        (*plast_pktl)->next = pktl;
668
    else
669
        *packet_buffer = pktl;
670
671 9d3b9f2c Michael Niedermayer
    /* add the packet in the buffered packet list */
672
    *plast_pktl = pktl;
673
    pktl->pkt= *pkt;
674
    return &pktl->pkt;
675
}
676
677 de6d9b64 Fabrice Bellard
int av_read_packet(AVFormatContext *s, AVPacket *pkt)
678
{
679 86cb7e33 Baptiste Coudurier
    int ret, i;
680 62600469 Michael Niedermayer
    AVStream *st;
681 0bef08e5 Michael Niedermayer
682
    for(;;){
683
        AVPacketList *pktl = s->raw_packet_buffer;
684
685
        if (pktl) {
686
            *pkt = pktl->pkt;
687 86cb7e33 Baptiste Coudurier
            if(s->streams[pkt->stream_index]->codec->codec_id != CODEC_ID_PROBE ||
688 af122d6a Baptiste Coudurier
               !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 0bef08e5 Michael Niedermayer
                s->raw_packet_buffer = pktl->next;
694 af122d6a Baptiste Coudurier
                s->raw_packet_buffer_remaining_size += pkt->size;
695 0bef08e5 Michael Niedermayer
                av_free(pktl);
696
                return 0;
697
            }
698
        }
699
700 55823964 Michael Niedermayer
        av_init_packet(pkt);
701
        ret= s->iformat->read_packet(s, pkt);
702 86cb7e33 Baptiste Coudurier
        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 55823964 Michael Niedermayer
        st= s->streams[pkt->stream_index];
710 62600469 Michael Niedermayer
711 55823964 Michael Niedermayer
        switch(st->codec->codec_type){
712 72415b2a Stefano Sabatini
        case AVMEDIA_TYPE_VIDEO:
713 55823964 Michael Niedermayer
            if(s->video_codec_id)   st->codec->codec_id= s->video_codec_id;
714
            break;
715 72415b2a Stefano Sabatini
        case AVMEDIA_TYPE_AUDIO:
716 55823964 Michael Niedermayer
            if(s->audio_codec_id)   st->codec->codec_id= s->audio_codec_id;
717
            break;
718 72415b2a Stefano Sabatini
        case AVMEDIA_TYPE_SUBTITLE:
719 55823964 Michael Niedermayer
            if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id;
720
            break;
721
        }
722 62600469 Michael Niedermayer
723 86cb7e33 Baptiste Coudurier
        if(!pktl && (st->codec->codec_id != CODEC_ID_PROBE ||
724
                     !st->probe_packets))
725 744b4c02 Michael Niedermayer
            return ret;
726
727 5c5b1731 Måns Rullgård
        add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end);
728 af122d6a Baptiste Coudurier
        s->raw_packet_buffer_remaining_size -= pkt->size;
729 744b4c02 Michael Niedermayer
730 0bef08e5 Michael Niedermayer
        if(st->codec->codec_id == CODEC_ID_PROBE){
731
            AVProbeData *pd = &st->probe_data;
732 0e500e0d Michael Niedermayer
            av_log(s, AV_LOG_DEBUG, "probing stream %d\n", st->index);
733 86cb7e33 Baptiste Coudurier
            --st->probe_packets;
734
735 0bef08e5 Michael Niedermayer
            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 942de2f4 Michael Niedermayer
            if(av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){
741 0f1f4816 Michael Niedermayer
                //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 25d3fb73 Michael Niedermayer
                if(st->codec->codec_id != CODEC_ID_PROBE){
744
                    pd->buf_size=0;
745
                    av_freep(&pd->buf);
746 0e500e0d Michael Niedermayer
                    av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
747 25d3fb73 Michael Niedermayer
                }
748 942de2f4 Michael Niedermayer
            }
749 0bef08e5 Michael Niedermayer
        }
750
    }
751 fb2758c8 Fabrice Bellard
}
752
753
/**********************************************************/
754
755 e36bdf8b Daniel Kristjansson
/**
756 a85736f2 Diego Biurrun
 * Get the number of samples of an audio frame. Return -1 on error.
757 e36bdf8b Daniel Kristjansson
 */
758 fb2758c8 Fabrice Bellard
static int get_audio_frame_size(AVCodecContext *enc, int size)
759
{
760
    int frame_size;
761
762 c924ca78 Michael Niedermayer
    if(enc->codec_id == CODEC_ID_VORBIS)
763
        return -1;
764
765 fb2758c8 Fabrice Bellard
    if (enc->frame_size <= 1) {
766 ac3e1834 Baptiste Coudurier
        int bits_per_sample = av_get_bits_per_sample(enc->codec_id);
767
768
        if (bits_per_sample) {
769 fb2758c8 Fabrice Bellard
            if (enc->channels == 0)
770
                return -1;
771 f1b163e0 Aurelien Jacobs
            frame_size = (size << 3) / (bits_per_sample * enc->channels);
772 ac3e1834 Baptiste Coudurier
        } else {
773 fb2758c8 Fabrice Bellard
            /* used for example by ADPCM codecs */
774
            if (enc->bit_rate == 0)
775
                return -1;
776 db5dc02b Baptiste Coudurier
            frame_size = ((int64_t)size * 8 * enc->sample_rate) / enc->bit_rate;
777 fb2758c8 Fabrice Bellard
        }
778
    } else {
779
        frame_size = enc->frame_size;
780
    }
781
    return frame_size;
782
}
783
784
785 e36bdf8b Daniel Kristjansson
/**
786 a85736f2 Diego Biurrun
 * Return the frame duration in seconds. Return 0 if not available.
787 e36bdf8b Daniel Kristjansson
 */
788 115329f1 Diego Biurrun
static void compute_frame_duration(int *pnum, int *pden, AVStream *st,
789 fb2758c8 Fabrice Bellard
                                   AVCodecParserContext *pc, AVPacket *pkt)
790
{
791
    int frame_size;
792
793
    *pnum = 0;
794
    *pden = 0;
795 01f4895c Michael Niedermayer
    switch(st->codec->codec_type) {
796 72415b2a Stefano Sabatini
    case AVMEDIA_TYPE_VIDEO:
797 1677155d Michael Niedermayer
        if(st->time_base.num*1000LL > st->time_base.den){
798 c0df9d75 Michael Niedermayer
            *pnum = st->time_base.num;
799
            *pden = st->time_base.den;
800 01f4895c Michael Niedermayer
        }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 327c4076 Michael Niedermayer
            if (pc && pc->repeat_pict) {
804 810c451b Ivan Schreter
                *pnum = (*pnum) * (1 + pc->repeat_pict);
805 327c4076 Michael Niedermayer
            }
806 497431a5 Michael Niedermayer
            //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 fb2758c8 Fabrice Bellard
        }
812
        break;
813 72415b2a Stefano Sabatini
    case AVMEDIA_TYPE_AUDIO:
814 01f4895c Michael Niedermayer
        frame_size = get_audio_frame_size(st->codec, pkt->size);
815 6cbce636 Daniel Kang
        if (frame_size <= 0 || st->codec->sample_rate <= 0)
816 fb2758c8 Fabrice Bellard
            break;
817
        *pnum = frame_size;
818 01f4895c Michael Niedermayer
        *pden = st->codec->sample_rate;
819 fb2758c8 Fabrice Bellard
        break;
820
    default:
821
        break;
822
    }
823
}
824
825 5ba7c3d7 Michael Niedermayer
static int is_intra_only(AVCodecContext *enc){
826 72415b2a Stefano Sabatini
    if(enc->codec_type == AVMEDIA_TYPE_AUDIO){
827 5ba7c3d7 Michael Niedermayer
        return 1;
828 72415b2a Stefano Sabatini
    }else if(enc->codec_type == AVMEDIA_TYPE_VIDEO){
829 5ba7c3d7 Michael Niedermayer
        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 f37b9768 Loren Merritt
        case CODEC_ID_FFVHUFF:
837 5ba7c3d7 Michael Niedermayer
        case CODEC_ID_ASV1:
838
        case CODEC_ID_ASV2:
839
        case CODEC_ID_VCR1:
840 b774fdd7 Baptiste Coudurier
        case CODEC_ID_DNXHD:
841 aa915625 Baptiste Coudurier
        case CODEC_ID_JPEG2000:
842 5ba7c3d7 Michael Niedermayer
            return 1;
843
        default: break;
844
        }
845
    }
846
    return 0;
847
}
848
849 9fcbcca6 Neil Brown
static void update_initial_timestamps(AVFormatContext *s, int stream_index,
850
                                      int64_t dts, int64_t pts)
851
{
852 82583548 Michael Niedermayer
    AVStream *st= s->streams[stream_index];
853
    AVPacketList *pktl= s->packet_buffer;
854
855 7efeb73a Michael Niedermayer
    if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE)
856 82583548 Michael Niedermayer
        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 48a59dfe Michael Niedermayer
871
        if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
872
            st->start_time= pktl->pkt.pts;
873 82583548 Michael Niedermayer
    }
874 9fcbcca6 Neil Brown
    if (st->start_time == AV_NOPTS_VALUE)
875
        st->start_time = pts;
876 82583548 Michael Niedermayer
}
877
878 83a9db42 Michael Niedermayer
static void update_initial_durations(AVFormatContext *s, AVStream *st, AVPacket *pkt)
879
{
880
    AVPacketList *pktl= s->packet_buffer;
881 820ad60c Michael Niedermayer
    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 83a9db42 Michael Niedermayer
897
    for(; pktl; pktl= pktl->next){
898
        if(pktl->pkt.stream_index != pkt->stream_index)
899
            continue;
900 91acf9a8 Michael Niedermayer
        if(pktl->pkt.pts == pktl->pkt.dts && pktl->pkt.dts == AV_NOPTS_VALUE
901
           && !pktl->pkt.duration){
902 820ad60c Michael Niedermayer
            pktl->pkt.dts= cur_dts;
903 5853423c Michael Niedermayer
            if(!st->codec->has_b_frames)
904 820ad60c Michael Niedermayer
                pktl->pkt.pts= cur_dts;
905
            cur_dts += pkt->duration;
906 83a9db42 Michael Niedermayer
            pktl->pkt.duration= pkt->duration;
907
        }else
908
            break;
909
    }
910 820ad60c Michael Niedermayer
    if(st->first_dts == AV_NOPTS_VALUE)
911
        st->cur_dts= cur_dts;
912 83a9db42 Michael Niedermayer
}
913
914 115329f1 Diego Biurrun
static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
915 fb2758c8 Fabrice Bellard
                               AVCodecParserContext *pc, AVPacket *pkt)
916
{
917 d9e1efb7 Michael Niedermayer
    int num, den, presentation_delayed, delay, i;
918 a74008a4 Joakim Plate
    int64_t offset;
919 115329f1 Diego Biurrun
920 fe8344a2 Michael Niedermayer
    if (s->flags & AVFMT_FLAG_NOFILLIN)
921
        return;
922
923 c55806e3 Michael Niedermayer
    if((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
924
        pkt->dts= AV_NOPTS_VALUE;
925
926 f4a4be3f Wallak
    if (st->codec->codec_id != CODEC_ID_H264 && pc && pc->pict_type == FF_B_TYPE)
927 e18027ac Carl Eugen Hoyos
        //FIXME Set low_delay = 0 when has_b_frames = 1
928 818062f2 Baptiste Coudurier
        st->codec->has_b_frames = 1;
929
930 f781f748 Michael Niedermayer
    /* 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 10a7571b Michael Niedermayer
    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 9806f846 Michael Niedermayer
    // 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 b0a18c2f XBMC
        av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination\n");
949 9806f846 Michael Niedermayer
        pkt->dts= pkt->pts= AV_NOPTS_VALUE;
950
    }
951
952 fb2758c8 Fabrice Bellard
    if (pkt->duration == 0) {
953 3c895fc0 Michael Niedermayer
        compute_frame_duration(&num, &den, st, pc, pkt);
954 fb2758c8 Fabrice Bellard
        if (den && num) {
955 0e1f78f9 Michael Niedermayer
            pkt->duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num, AV_ROUND_DOWN);
956 83a9db42 Michael Niedermayer
957 820ad60c Michael Niedermayer
            if(pkt->duration != 0 && s->packet_buffer)
958 83a9db42 Michael Niedermayer
                update_initial_durations(s, st, pkt);
959 fb2758c8 Fabrice Bellard
        }
960
    }
961
962 a85736f2 Diego Biurrun
    /* correct timestamps with byte offset if demuxers only have timestamps
963
       on packet boundaries */
964 a74008a4 Joakim Plate
    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 27ca0a79 Ivan Schreter
    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 755bfeab Diego Biurrun
    /* This may be redundant, but it should not hurt. */
993 7e4baa66 Michael Niedermayer
    if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
994
        presentation_delayed = 1;
995 115329f1 Diego Biurrun
996 949b1a13 Steve L'Homme
//    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 fb2758c8 Fabrice Bellard
    /* interpolate PTS and DTS if they are not present */
998 9e6c124a Michael Niedermayer
    //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 7e4baa66 Michael Niedermayer
        if (presentation_delayed) {
1001 a85736f2 Diego Biurrun
            /* DTS = decompression timestamp */
1002
            /* PTS = presentation timestamp */
1003 7e4baa66 Michael Niedermayer
            if (pkt->dts == AV_NOPTS_VALUE)
1004 635fbcb1 Michael Niedermayer
                pkt->dts = st->last_IP_pts;
1005 9fcbcca6 Neil Brown
            update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts);
1006 7e4baa66 Michael Niedermayer
            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 a85736f2 Diego Biurrun
            of the frame we are displaying, i.e. the last I- or P-frame */
1011 635fbcb1 Michael Niedermayer
            if (st->last_IP_duration == 0)
1012
                st->last_IP_duration = pkt->duration;
1013 7efeb73a Michael Niedermayer
            if(pkt->dts != AV_NOPTS_VALUE)
1014 cdb5af79 Michael Niedermayer
                st->cur_dts = pkt->dts + st->last_IP_duration;
1015 635fbcb1 Michael Niedermayer
            st->last_IP_duration  = pkt->duration;
1016
            st->last_IP_pts= pkt->pts;
1017 7e4baa66 Michael Niedermayer
            /* cannot compute PTS if not present (we can compute it only
1018 a85736f2 Diego Biurrun
            by knowing the future */
1019 028d6f3e Michael Niedermayer
        } else if(pkt->pts != AV_NOPTS_VALUE || pkt->dts != AV_NOPTS_VALUE || pkt->duration){
1020 7e4baa66 Michael Niedermayer
            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 90bb394d Michael Niedermayer
            }
1028 115329f1 Diego Biurrun
1029 7e4baa66 Michael Niedermayer
            /* presentation is not delayed : PTS and DTS are the same */
1030
            if(pkt->pts == AV_NOPTS_VALUE)
1031
                pkt->pts = pkt->dts;
1032 9fcbcca6 Neil Brown
            update_initial_timestamps(s, pkt->stream_index, pkt->pts, pkt->pts);
1033 7e4baa66 Michael Niedermayer
            if(pkt->pts == AV_NOPTS_VALUE)
1034
                pkt->pts = st->cur_dts;
1035
            pkt->dts = pkt->pts;
1036 7efeb73a Michael Niedermayer
            if(pkt->pts != AV_NOPTS_VALUE)
1037 cdb5af79 Michael Niedermayer
                st->cur_dts = pkt->pts + pkt->duration;
1038 7e4baa66 Michael Niedermayer
        }
1039 fb2758c8 Fabrice Bellard
    }
1040 d9e1efb7 Michael Niedermayer
1041 cb5b96cd Baptiste Coudurier
    if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
1042 d9e1efb7 Michael Niedermayer
        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 9e6c124a Michael Niedermayer
        if(st->codec->codec_id == CODEC_ID_H264){ //we skiped it above so we try here
1048 9fcbcca6 Neil Brown
            update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); // this should happen on the first packet
1049 82583548 Michael Niedermayer
        }
1050 d9e1efb7 Michael Niedermayer
        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 115329f1 Diego Biurrun
1056 fb2758c8 Fabrice Bellard
    /* update flags */
1057 3a1d3588 Jeff Downs
    if(is_intra_only(st->codec))
1058 cc947f04 Jean-Daniel Dupas
        pkt->flags |= AV_PKT_FLAG_KEY;
1059 3a1d3588 Jeff Downs
    else if (pc) {
1060 fb2758c8 Fabrice Bellard
        pkt->flags = 0;
1061 a85736f2 Diego Biurrun
        /* keyframe computation */
1062 6363af44 Ivan Schreter
        if (pc->key_frame == 1)
1063 cc947f04 Jean-Daniel Dupas
            pkt->flags |= AV_PKT_FLAG_KEY;
1064 6363af44 Ivan Schreter
        else if (pc->key_frame == -1 && pc->pict_type == FF_I_TYPE)
1065 cc947f04 Jean-Daniel Dupas
            pkt->flags |= AV_PKT_FLAG_KEY;
1066 fb2758c8 Fabrice Bellard
    }
1067 b1fa4942 Ivan Schreter
    if (pc)
1068
        pkt->convergence_duration = pc->convergence_duration;
1069 fb2758c8 Fabrice Bellard
}
1070
1071
1072
static int av_read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1073
{
1074
    AVStream *st;
1075 37353960 Fabrice Bellard
    int len, ret, i;
1076 fb2758c8 Fabrice Bellard
1077 b237eb80 Michael Niedermayer
    av_init_packet(pkt);
1078
1079 fb2758c8 Fabrice Bellard
    for(;;) {
1080
        /* select current input stream component */
1081
        st = s->cur_st;
1082
        if (st) {
1083 90ad92b3 Michael Niedermayer
            if (!st->need_parsing || !st->parser) {
1084 fb2758c8 Fabrice Bellard
                /* no parsing needed: we just output the packet as is */
1085
                /* raw data support */
1086 3a41c2f7 Michael Niedermayer
                *pkt = st->cur_pkt; st->cur_pkt.data= NULL;
1087 fb2758c8 Fabrice Bellard
                compute_pkt_fields(s, st, NULL, pkt);
1088
                s->cur_st = NULL;
1089 74f5ae84 Reimar Döffinger
                if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1090 cc947f04 Jean-Daniel Dupas
                    (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1091 74f5ae84 Reimar Döffinger
                    ff_reduce_index(s, st->index);
1092
                    av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1093
                }
1094 434cab9e Michael Niedermayer
                break;
1095 3a41c2f7 Michael Niedermayer
            } else if (st->cur_len > 0 && st->discard < AVDISCARD_ALL) {
1096 61c23c15 Ivan Schreter
                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 3a41c2f7 Michael Niedermayer
                st->cur_pkt.pts = AV_NOPTS_VALUE;
1101
                st->cur_pkt.dts = AV_NOPTS_VALUE;
1102 fb2758c8 Fabrice Bellard
                /* increment read pointer */
1103 3a41c2f7 Michael Niedermayer
                st->cur_ptr += len;
1104
                st->cur_len -= len;
1105 115329f1 Diego Biurrun
1106 fb2758c8 Fabrice Bellard
                /* return packet if any */
1107
                if (pkt->size) {
1108 37353960 Fabrice Bellard
                got_packet:
1109 fb2758c8 Fabrice Bellard
                    pkt->duration = 0;
1110
                    pkt->stream_index = st->index;
1111 6ec87caa Fabrice Bellard
                    pkt->pts = st->parser->pts;
1112
                    pkt->dts = st->parser->dts;
1113 61c23c15 Ivan Schreter
                    pkt->pos = st->parser->pos;
1114 a5266a47 Michael Niedermayer
                    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 22d78b05 Eli Friedman
                        st->cur_pkt.destruct= NULL;
1118 a5266a47 Michael Niedermayer
                        st->cur_pkt.data    = NULL;
1119
                        assert(st->cur_len == 0);
1120
                    }else{
1121 80d403fc Reimar Döffinger
                    pkt->destruct = NULL;
1122 a5266a47 Michael Niedermayer
                    }
1123 fb2758c8 Fabrice Bellard
                    compute_pkt_fields(s, st, st->parser, pkt);
1124 e9b78eeb Michael Niedermayer
1125 cc947f04 Jean-Daniel Dupas
                    if((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY){
1126 3dea63bd Paul Kelly
                        ff_reduce_index(s, st->index);
1127 e9b78eeb Michael Niedermayer
                        av_add_index_entry(st, st->parser->frame_offset, pkt->dts,
1128
                                           0, 0, AVINDEX_KEYFRAME);
1129
                    }
1130
1131 434cab9e Michael Niedermayer
                    break;
1132 fb2758c8 Fabrice Bellard
                }
1133
            } else {
1134 bcbecff1 Fabrice Bellard
                /* free packet */
1135 3a41c2f7 Michael Niedermayer
                av_free_packet(&st->cur_pkt);
1136 fb2758c8 Fabrice Bellard
                s->cur_st = NULL;
1137
            }
1138
        } else {
1139 3a41c2f7 Michael Niedermayer
            AVPacket cur_pkt;
1140 fb2758c8 Fabrice Bellard
            /* read next packet */
1141 3a41c2f7 Michael Niedermayer
            ret = av_read_packet(s, &cur_pkt);
1142 37353960 Fabrice Bellard
            if (ret < 0) {
1143 8fa36ae0 François Revol
                if (ret == AVERROR(EAGAIN))
1144 37353960 Fabrice Bellard
                    return ret;
1145
                /* return the last frames, if any */
1146
                for(i = 0; i < s->nb_streams; i++) {
1147
                    st = s->streams[i];
1148 90ad92b3 Michael Niedermayer
                    if (st->parser && st->need_parsing) {
1149 61c23c15 Ivan Schreter
                        av_parser_parse2(st->parser, st->codec,
1150 115329f1 Diego Biurrun
                                        &pkt->data, &pkt->size,
1151
                                        NULL, 0,
1152 61c23c15 Ivan Schreter
                                        AV_NOPTS_VALUE, AV_NOPTS_VALUE,
1153
                                        AV_NOPTS_VALUE);
1154 37353960 Fabrice Bellard
                        if (pkt->size)
1155
                            goto got_packet;
1156
                    }
1157
                }
1158 a85736f2 Diego Biurrun
                /* no more packets: really terminate parsing */
1159 fb2758c8 Fabrice Bellard
                return ret;
1160 37353960 Fabrice Bellard
            }
1161 3a41c2f7 Michael Niedermayer
            st = s->streams[cur_pkt.stream_index];
1162
            st->cur_pkt= cur_pkt;
1163 115329f1 Diego Biurrun
1164 3a41c2f7 Michael Niedermayer
            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 b18a4ab2 Michael Niedermayer
                av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d\n",
1168 3a41c2f7 Michael Niedermayer
                    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 b18a4ab2 Michael Niedermayer
//                return -1;
1174
            }
1175
1176 45b2b05f Michael Niedermayer
            if(s->debug & FF_FDEBUG_TS)
1177 050ba6f4 Baptiste Coudurier
                av_log(s, AV_LOG_DEBUG, "av_read_packet stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n",
1178 3a41c2f7 Michael Niedermayer
                    st->cur_pkt.stream_index,
1179
                    st->cur_pkt.pts,
1180
                    st->cur_pkt.dts,
1181
                    st->cur_pkt.size,
1182 050ba6f4 Baptiste Coudurier
                    st->cur_pkt.duration,
1183 3a41c2f7 Michael Niedermayer
                    st->cur_pkt.flags);
1184 fb2758c8 Fabrice Bellard
1185
            s->cur_st = st;
1186 3a41c2f7 Michael Niedermayer
            st->cur_ptr = st->cur_pkt.data;
1187
            st->cur_len = st->cur_pkt.size;
1188 fe8344a2 Michael Niedermayer
            if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1189 01f4895c Michael Niedermayer
                st->parser = av_parser_init(st->codec->codec_id);
1190 fb2758c8 Fabrice Bellard
                if (!st->parser) {
1191 a85736f2 Diego Biurrun
                    /* no parser available: just output the raw packets */
1192 57004ff1 Aurelien Jacobs
                    st->need_parsing = AVSTREAM_PARSE_NONE;
1193
                }else if(st->need_parsing == AVSTREAM_PARSE_HEADERS){
1194 7cbaa7ba Michael Niedermayer
                    st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1195 74a6df59 Alex Converse
                }else if(st->need_parsing == AVSTREAM_PARSE_FULL_ONCE){
1196
                    st->parser->flags |= PARSER_FLAG_ONCE;
1197 fb2758c8 Fabrice Bellard
                }
1198
            }
1199
        }
1200
    }
1201 45b2b05f Michael Niedermayer
    if(s->debug & FF_FDEBUG_TS)
1202 050ba6f4 Baptiste Coudurier
        av_log(s, AV_LOG_DEBUG, "av_read_frame_internal stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n",
1203 434cab9e Michael Niedermayer
            pkt->stream_index,
1204
            pkt->pts,
1205
            pkt->dts,
1206 3041a4a1 Michael Niedermayer
            pkt->size,
1207 050ba6f4 Baptiste Coudurier
            pkt->duration,
1208 3041a4a1 Michael Niedermayer
            pkt->flags);
1209 434cab9e Michael Niedermayer
1210
    return 0;
1211 fb2758c8 Fabrice Bellard
}
1212
1213
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1214
{
1215 de6d9b64 Fabrice Bellard
    AVPacketList *pktl;
1216 30bc6613 Michael Niedermayer
    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 5be5d28c Stephen Dredge
                int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1226 30bc6613 Michael Niedermayer
                while(pktl && next_pkt->pts == AV_NOPTS_VALUE){
1227 115329f1 Diego Biurrun
                    if(   pktl->pkt.stream_index == next_pkt->stream_index
1228 5be5d28c Stephen Dredge
                       && (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 30bc6613 Michael Niedermayer
                        next_pkt->pts= pktl->pkt.dts;
1231
                    }
1232
                    pktl= pktl->next;
1233
                }
1234
                pktl = s->packet_buffer;
1235
            }
1236 115329f1 Diego Biurrun
1237
            if(   next_pkt->pts != AV_NOPTS_VALUE
1238
               || next_pkt->dts == AV_NOPTS_VALUE
1239 30bc6613 Michael Niedermayer
               || !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 8fa36ae0 François Revol
                if(pktl && ret != AVERROR(EAGAIN)){
1251 30bc6613 Michael Niedermayer
                    eof=1;
1252
                    continue;
1253
                }else
1254
                    return ret;
1255
            }
1256 115329f1 Diego Biurrun
1257 5c5b1731 Måns Rullgård
            if(av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
1258
                                           &s->packet_buffer_end)) < 0)
1259 769e10f0 Panagiotis Issaris
                return AVERROR(ENOMEM);
1260 30bc6613 Michael Niedermayer
        }else{
1261
            assert(!s->packet_buffer);
1262
            return av_read_frame_internal(s, pkt);
1263
        }
1264 fb2758c8 Fabrice Bellard
    }
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 115329f1 Diego Biurrun
        if (!pktl)
1275 fb2758c8 Fabrice Bellard
            break;
1276
        s->packet_buffer = pktl->next;
1277
        av_free_packet(&pktl->pkt);
1278
        av_free(pktl);
1279 b9a281db Fabrice Bellard
    }
1280 86cb7e33 Baptiste Coudurier
    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 42831b46 Michael Niedermayer
    s->packet_buffer_end=
1287
    s->raw_packet_buffer_end= NULL;
1288 af122d6a Baptiste Coudurier
    s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1289 b9a281db Fabrice Bellard
}
1290
1291 da24c5e3 Fabrice Bellard
/*******************************************************/
1292 fb2758c8 Fabrice Bellard
/* seek support */
1293
1294 b754978a Michael Niedermayer
int av_find_default_stream_index(AVFormatContext *s)
1295
{
1296 ca162a50 Aurelien Jacobs
    int first_audio_index = -1;
1297 b754978a Michael Niedermayer
    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 72415b2a Stefano Sabatini
        if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1305 b754978a Michael Niedermayer
            return i;
1306
        }
1307 72415b2a Stefano Sabatini
        if (first_audio_index < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1308 ca162a50 Aurelien Jacobs
            first_audio_index = i;
1309 b754978a Michael Niedermayer
    }
1310 ca162a50 Aurelien Jacobs
    return first_audio_index >= 0 ? first_audio_index : 0;
1311 b754978a Michael Niedermayer
}
1312
1313 e36bdf8b Daniel Kristjansson
/**
1314
 * Flush the frame reader.
1315
 */
1316 972ffe62 Aurelien Jacobs
void ff_read_frame_flush(AVFormatContext *s)
1317 fb2758c8 Fabrice Bellard
{
1318
    AVStream *st;
1319 106fa129 John Stebbins
    int i, j;
1320 fb2758c8 Fabrice Bellard
1321
    flush_packet_queue(s);
1322
1323 3a41c2f7 Michael Niedermayer
    s->cur_st = NULL;
1324 115329f1 Diego Biurrun
1325 fb2758c8 Fabrice Bellard
    /* for each stream, reset read state */
1326
    for(i = 0; i < s->nb_streams; i++) {
1327
        st = s->streams[i];
1328 115329f1 Diego Biurrun
1329 fb2758c8 Fabrice Bellard
        if (st->parser) {
1330
            av_parser_close(st->parser);
1331
            st->parser = NULL;
1332 3a41c2f7 Michael Niedermayer
            av_free_packet(&st->cur_pkt);
1333 fb2758c8 Fabrice Bellard
        }
1334 635fbcb1 Michael Niedermayer
        st->last_IP_pts = AV_NOPTS_VALUE;
1335 a843d1ff Michael Niedermayer
        st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
1336 27ca0a79 Ivan Schreter
        st->reference_dts = AV_NOPTS_VALUE;
1337 3a41c2f7 Michael Niedermayer
        /* fail safe */
1338
        st->cur_ptr = NULL;
1339
        st->cur_len = 0;
1340 86cb7e33 Baptiste Coudurier
1341
        st->probe_packets = MAX_PROBE_PACKETS;
1342 106fa129 John Stebbins
1343
        for(j=0; j<MAX_REORDER_DELAY+1; j++)
1344
            st->pts_buffer[j]= AV_NOPTS_VALUE;
1345 fb2758c8 Fabrice Bellard
    }
1346
}
1347
1348 22ffac70 Reimar Döffinger
void av_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp){
1349 8bcb147f Michael Niedermayer
    int i;
1350
1351
    for(i = 0; i < s->nb_streams; i++) {
1352 1a1dc611 Nathan Kurz
        AVStream *st = s->streams[i];
1353 8bcb147f Michael Niedermayer
1354 115329f1 Diego Biurrun
        st->cur_dts = av_rescale(timestamp,
1355 1a1dc611 Nathan Kurz
                                 st->time_base.den * (int64_t)ref_st->time_base.num,
1356
                                 st->time_base.num * (int64_t)ref_st->time_base.den);
1357 8bcb147f Michael Niedermayer
    }
1358
}
1359
1360 3dea63bd Paul Kelly
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 2d9fd181 Peter Ross
int ff_add_index_entry(AVIndexEntry **index_entries,
1374
                       int *nb_index_entries,
1375
                       unsigned int *index_entries_allocated_size,
1376
                       int64_t pos, int64_t timestamp, int size, int distance, int flags)
1377 fb2758c8 Fabrice Bellard
{
1378
    AVIndexEntry *entries, *ie;
1379 b754978a Michael Niedermayer
    int index;
1380 115329f1 Diego Biurrun
1381 2d9fd181 Peter Ross
    if((unsigned)*nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1382 568e18b1 Michael Niedermayer
        return -1;
1383 115329f1 Diego Biurrun
1384 2d9fd181 Peter Ross
    entries = av_fast_realloc(*index_entries,
1385
                              index_entries_allocated_size,
1386
                              (*nb_index_entries + 1) *
1387 fb2758c8 Fabrice Bellard
                              sizeof(AVIndexEntry));
1388 568e18b1 Michael Niedermayer
    if(!entries)
1389
        return -1;
1390
1391 2d9fd181 Peter Ross
    *index_entries= entries;
1392 b754978a Michael Niedermayer
1393 2d9fd181 Peter Ross
    index= ff_index_search_timestamp(*index_entries, *nb_index_entries, timestamp, AVSEEK_FLAG_ANY);
1394 b754978a Michael Niedermayer
1395 3ba1438d Michael Niedermayer
    if(index<0){
1396 2d9fd181 Peter Ross
        index= (*nb_index_entries)++;
1397 3e9245a9 Michael Niedermayer
        ie= &entries[index];
1398 3ba1438d Michael Niedermayer
        assert(index==0 || ie[-1].timestamp < timestamp);
1399
    }else{
1400
        ie= &entries[index];
1401
        if(ie->timestamp != timestamp){
1402 528c2c73 Michael Niedermayer
            if(ie->timestamp <= timestamp)
1403
                return -1;
1404 2d9fd181 Peter Ross
            memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(*nb_index_entries - index));
1405
            (*nb_index_entries)++;
1406 755bfeab Diego Biurrun
        }else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance
1407 3ba1438d Michael Niedermayer
            distance= ie->min_distance;
1408 3e9245a9 Michael Niedermayer
    }
1409 3ba1438d Michael Niedermayer
1410 b754978a Michael Niedermayer
    ie->pos = pos;
1411
    ie->timestamp = timestamp;
1412 3e9245a9 Michael Niedermayer
    ie->min_distance= distance;
1413 30a43f2d Michael Niedermayer
    ie->size= size;
1414 b754978a Michael Niedermayer
    ie->flags = flags;
1415 115329f1 Diego Biurrun
1416 3e9245a9 Michael Niedermayer
    return index;
1417 fb2758c8 Fabrice Bellard
}
1418
1419 2d9fd181 Peter Ross
int av_add_index_entry(AVStream *st,
1420
                       int64_t pos, int64_t timestamp, int size, int distance, int flags)
1421
{
1422
    return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
1423
                              &st->index_entries_allocated_size, pos,
1424
                              timestamp, size, distance, flags);
1425
}
1426
1427
int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
1428
                              int64_t wanted_timestamp, int flags)
1429 fb2758c8 Fabrice Bellard
{
1430
    int a, b, m;
1431
    int64_t timestamp;
1432
1433 3ba1438d Michael Niedermayer
    a = - 1;
1434
    b = nb_entries;
1435 b754978a Michael Niedermayer
1436 67c10de7 Michael Niedermayer
    //optimize appending index entries at the end
1437
    if(b && entries[b-1].timestamp < wanted_timestamp)
1438
        a= b-1;
1439
1440 3ba1438d Michael Niedermayer
    while (b - a > 1) {
1441
        m = (a + b) >> 1;
1442 fb2758c8 Fabrice Bellard
        timestamp = entries[m].timestamp;
1443 3ba1438d Michael Niedermayer
        if(timestamp >= wanted_timestamp)
1444
            b = m;
1445
        if(timestamp <= wanted_timestamp)
1446 b754978a Michael Niedermayer
            a = m;
1447 fb2758c8 Fabrice Bellard
    }
1448 27a5fe5f Michael Niedermayer
    m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1449 115329f1 Diego Biurrun
1450 27a5fe5f Michael Niedermayer
    if(!(flags & AVSEEK_FLAG_ANY)){
1451
        while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){
1452
            m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1453
        }
1454
    }
1455 3ba1438d Michael Niedermayer
1456 115329f1 Diego Biurrun
    if(m == nb_entries)
1457 3ba1438d Michael Niedermayer
        return -1;
1458
    return  m;
1459 fb2758c8 Fabrice Bellard
}
1460
1461 2d9fd181 Peter Ross
int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
1462
                              int flags)
1463
{
1464
    return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
1465
                                     wanted_timestamp, flags);
1466
}
1467
1468 0f652a8e Benoit Fouet
#define DEBUG_SEEK
1469 8d14a25c Michael Niedermayer
1470 3ba1438d Michael Niedermayer
int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags){
1471 8d14a25c Michael Niedermayer
    AVInputFormat *avif= s->iformat;
1472 e6586575 Diego Biurrun
    int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
1473 8d14a25c Michael Niedermayer
    int64_t ts_min, ts_max, ts;
1474 89ddd2a9 Michael Niedermayer
    int index;
1475 b593f7fd Sean Soria
    int64_t ret;
1476 8d14a25c Michael Niedermayer
    AVStream *st;
1477
1478 cdd5034f Michael Niedermayer
    if (stream_index < 0)
1479
        return -1;
1480 115329f1 Diego Biurrun
1481 8d14a25c Michael Niedermayer
#ifdef DEBUG_SEEK
1482 4733abcb Måns Rullgård
    av_log(s, AV_LOG_DEBUG, "read_seek: %d %"PRId64"\n", stream_index, target_ts);
1483 8d14a25c Michael Niedermayer
#endif
1484
1485
    ts_max=
1486
    ts_min= AV_NOPTS_VALUE;
1487 90b5b51e Diego Biurrun
    pos_limit= -1; //gcc falsely says it may be uninitialized
1488 8d14a25c Michael Niedermayer
1489
    st= s->streams[stream_index];
1490
    if(st->index_entries){
1491
        AVIndexEntry *e;
1492
1493 a85736f2 Diego Biurrun
        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()
1494 3ba1438d Michael Niedermayer
        index= FFMAX(index, 0);
1495 8d14a25c Michael Niedermayer
        e= &st->index_entries[index];
1496
1497
        if(e->timestamp <= target_ts || e->pos == e->min_distance){
1498
            pos_min= e->pos;
1499
            ts_min= e->timestamp;
1500
#ifdef DEBUG_SEEK
1501 c0492097 Diego Biurrun
            av_log(s, AV_LOG_DEBUG, "using cached pos_min=0x%"PRIx64" dts_min=%"PRId64"\n",
1502
                   pos_min,ts_min);
1503 8d14a25c Michael Niedermayer
#endif
1504
        }else{
1505
            assert(index==0);
1506
        }
1507 115329f1 Diego Biurrun
1508
        index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD);
1509 27a5fe5f Michael Niedermayer
        assert(index < st->nb_index_entries);
1510
        if(index >= 0){
1511 8d14a25c Michael Niedermayer
            e= &st->index_entries[index];
1512
            assert(e->timestamp >= target_ts);
1513
            pos_max= e->pos;
1514
            ts_max= e->timestamp;
1515
            pos_limit= pos_max - e->min_distance;
1516
#ifdef DEBUG_SEEK
1517 c0492097 Diego Biurrun
            av_log(s, AV_LOG_DEBUG, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%"PRId64"\n",
1518
                   pos_max,pos_limit, ts_max);
1519 8d14a25c Michael Niedermayer
#endif
1520
        }
1521
    }
1522
1523 89ddd2a9 Michael Niedermayer
    pos= av_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp);
1524
    if(pos<0)
1525
        return -1;
1526
1527
    /* do the seek */
1528 b593f7fd Sean Soria
    if ((ret = url_fseek(s->pb, pos, SEEK_SET)) < 0)
1529
        return ret;
1530 89ddd2a9 Michael Niedermayer
1531
    av_update_cur_dts(s, st, ts);
1532
1533
    return 0;
1534
}
1535
1536
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 )){
1537
    int64_t pos, ts;
1538
    int64_t start_pos, filesize;
1539
    int no_change;
1540
1541
#ifdef DEBUG_SEEK
1542
    av_log(s, AV_LOG_DEBUG, "gen_seek: %d %"PRId64"\n", stream_index, target_ts);
1543
#endif
1544
1545 8d14a25c Michael Niedermayer
    if(ts_min == AV_NOPTS_VALUE){
1546
        pos_min = s->data_offset;
1547 89ddd2a9 Michael Niedermayer
        ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1548 8d14a25c Michael Niedermayer
        if (ts_min == AV_NOPTS_VALUE)
1549
            return -1;
1550
    }
1551
1552
    if(ts_max == AV_NOPTS_VALUE){
1553
        int step= 1024;
1554 899681cd Björn Axelsson
        filesize = url_fsize(s->pb);
1555 6fd93ce2 Kenneth Aafløy
        pos_max = filesize - 1;
1556 8d14a25c Michael Niedermayer
        do{
1557
            pos_max -= step;
1558 89ddd2a9 Michael Niedermayer
            ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step);
1559 8d14a25c Michael Niedermayer
            step += step;
1560
        }while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
1561
        if (ts_max == AV_NOPTS_VALUE)
1562
            return -1;
1563 115329f1 Diego Biurrun
1564 8d14a25c Michael Niedermayer
        for(;;){
1565
            int64_t tmp_pos= pos_max + 1;
1566 89ddd2a9 Michael Niedermayer
            int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX);
1567 8d14a25c Michael Niedermayer
            if(tmp_ts == AV_NOPTS_VALUE)
1568
                break;
1569
            ts_max= tmp_ts;
1570
            pos_max= tmp_pos;
1571 6fd93ce2 Kenneth Aafløy
            if(tmp_pos >= filesize)
1572
                break;
1573 8d14a25c Michael Niedermayer
        }
1574
        pos_limit= pos_max;
1575
    }
1576
1577 53f7c43f Michael Niedermayer
    if(ts_min > ts_max){
1578
        return -1;
1579
    }else if(ts_min == ts_max){
1580
        pos_limit= pos_min;
1581
    }
1582
1583 8d14a25c Michael Niedermayer
    no_change=0;
1584
    while (pos_min < pos_limit) {
1585
#ifdef DEBUG_SEEK
1586 115329f1 Diego Biurrun
        av_log(s, AV_LOG_DEBUG, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%"PRId64" dts_max=%"PRId64"\n",
1587 8d14a25c Michael Niedermayer
               pos_min, pos_max,
1588
               ts_min, ts_max);
1589
#endif
1590
        assert(pos_limit <= pos_max);
1591
1592
        if(no_change==0){
1593
            int64_t approximate_keyframe_distance= pos_max - pos_limit;
1594
            // interpolate position (better than dichotomy)
1595 3ba1438d Michael Niedermayer
            pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min)
1596
                + pos_min - approximate_keyframe_distance;
1597 8d14a25c Michael Niedermayer
        }else if(no_change==1){
1598
            // bisection, if interpolation failed to change min or max pos last time
1599
            pos = (pos_min + pos_limit)>>1;
1600
        }else{
1601 a85736f2 Diego Biurrun
            /* linear search if bisection failed, can only happen if there
1602
               are very few or no keyframes between min/max */
1603 8d14a25c Michael Niedermayer
            pos=pos_min;
1604
        }
1605
        if(pos <= pos_min)
1606
            pos= pos_min + 1;
1607
        else if(pos > pos_limit)
1608
            pos= pos_limit;
1609
        start_pos= pos;
1610
1611 89ddd2a9 Michael Niedermayer
        ts = read_timestamp(s, stream_index, &pos, INT64_MAX); //may pass pos_limit instead of -1
1612 8d14a25c Michael Niedermayer
        if(pos == pos_max)
1613
            no_change++;
1614
        else
1615
            no_change=0;
1616
#ifdef DEBUG_SEEK
1617 c0492097 Diego Biurrun
        av_log(s, AV_LOG_DEBUG, "%"PRId64" %"PRId64" %"PRId64" / %"PRId64" %"PRId64" %"PRId64" target:%"PRId64" limit:%"PRId64" start:%"PRId64" noc:%d\n",
1618
               pos_min, pos, pos_max, ts_min, ts, ts_max, target_ts, pos_limit,
1619
               start_pos, no_change);
1620 8d14a25c Michael Niedermayer
#endif
1621 db2a0e22 Michael Niedermayer
        if(ts == AV_NOPTS_VALUE){
1622
            av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
1623
            return -1;
1624
        }
1625 8d14a25c Michael Niedermayer
        assert(ts != AV_NOPTS_VALUE);
1626 3ba1438d Michael Niedermayer
        if (target_ts <= ts) {
1627 8d14a25c Michael Niedermayer
            pos_limit = start_pos - 1;
1628
            pos_max = pos;
1629
            ts_max = ts;
1630 3ba1438d Michael Niedermayer
        }
1631
        if (target_ts >= ts) {
1632 8d14a25c Michael Niedermayer
            pos_min = pos;
1633
            ts_min = ts;
1634
        }
1635
    }
1636 115329f1 Diego Biurrun
1637 3ba1438d Michael Niedermayer
    pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1638
    ts  = (flags & AVSEEK_FLAG_BACKWARD) ?  ts_min :  ts_max;
1639 8d14a25c Michael Niedermayer
#ifdef DEBUG_SEEK
1640
    pos_min = pos;
1641 89ddd2a9 Michael Niedermayer
    ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1642 8d14a25c Michael Niedermayer
    pos_min++;
1643 89ddd2a9 Michael Niedermayer
    ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1644 115329f1 Diego Biurrun
    av_log(s, AV_LOG_DEBUG, "pos=0x%"PRIx64" %"PRId64"<=%"PRId64"<=%"PRId64"\n",
1645 8d14a25c Michael Niedermayer
           pos, ts_min, target_ts, ts_max);
1646
#endif
1647 89ddd2a9 Michael Niedermayer
    *ts_ret= ts;
1648
    return pos;
1649 8d14a25c Michael Niedermayer
}
1650
1651 3ba1438d Michael Niedermayer
static int av_seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
1652
    int64_t pos_min, pos_max;
1653
#if 0
1654
    AVStream *st;
1655

1656
    if (stream_index < 0)
1657
        return -1;
1658

1659
    st= s->streams[stream_index];
1660
#endif
1661
1662
    pos_min = s->data_offset;
1663 899681cd Björn Axelsson
    pos_max = url_fsize(s->pb) - 1;
1664 3ba1438d Michael Niedermayer
1665
    if     (pos < pos_min) pos= pos_min;
1666
    else if(pos > pos_max) pos= pos_max;
1667
1668 899681cd Björn Axelsson
    url_fseek(s->pb, pos, SEEK_SET);
1669 3ba1438d Michael Niedermayer
1670
#if 0
1671 8bcb147f Michael Niedermayer
    av_update_cur_dts(s, st, ts);
1672 3ba1438d Michael Niedermayer
#endif
1673
    return 0;
1674
}
1675
1676 115329f1 Diego Biurrun
static int av_seek_frame_generic(AVFormatContext *s,
1677 3ba1438d Michael Niedermayer
                                 int stream_index, int64_t timestamp, int flags)
1678 fb2758c8 Fabrice Bellard
{
1679 6659b32a Sean Soria
    int index;
1680
    int64_t ret;
1681 fb2758c8 Fabrice Bellard
    AVStream *st;
1682
    AVIndexEntry *ie;
1683
1684
    st = s->streams[stream_index];
1685 e9b78eeb Michael Niedermayer
1686 27a5fe5f Michael Niedermayer
    index = av_index_search_timestamp(st, timestamp, flags);
1687 e9b78eeb Michael Niedermayer
1688 8c3b161e Michael Niedermayer
    if(index < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
1689
        return -1;
1690
1691 b5a3541d Michael Niedermayer
    if(index < 0 || index==st->nb_index_entries-1){
1692 e9b78eeb Michael Niedermayer
        int i;
1693
        AVPacket pkt;
1694
1695 5e5c9086 Michael Niedermayer
        if(st->nb_index_entries){
1696
            assert(st->index_entries);
1697 e9b78eeb Michael Niedermayer
            ie= &st->index_entries[st->nb_index_entries-1];
1698 aaec4e03 Baptiste Coudurier
            if ((ret = url_fseek(s->pb, ie->pos, SEEK_SET)) < 0)
1699
                return ret;
1700 e9b78eeb Michael Niedermayer
            av_update_cur_dts(s, st, ie->timestamp);
1701 aaec4e03 Baptiste Coudurier
        }else{
1702 3a4f91f5 Reimar Döffinger
            if ((ret = url_fseek(s->pb, s->data_offset, SEEK_SET)) < 0)
1703 aaec4e03 Baptiste Coudurier
                return ret;
1704
        }
1705 e9b78eeb Michael Niedermayer
        for(i=0;; i++) {
1706 cda6902d Michael Niedermayer
            int ret;
1707
            do{
1708
                ret = av_read_frame(s, &pkt);
1709
            }while(ret == AVERROR(EAGAIN));
1710 e9b78eeb Michael Niedermayer
            if(ret<0)
1711
                break;
1712
            av_free_packet(&pkt);
1713
            if(stream_index == pkt.stream_index){
1714 cc947f04 Jean-Daniel Dupas
                if((pkt.flags & AV_PKT_FLAG_KEY) && pkt.dts > timestamp)
1715 e9b78eeb Michael Niedermayer
                    break;
1716
            }
1717
        }
1718
        index = av_index_search_timestamp(st, timestamp, flags);
1719
    }
1720 fb2758c8 Fabrice Bellard
    if (index < 0)
1721
        return -1;
1722
1723 972ffe62 Aurelien Jacobs
    ff_read_frame_flush(s);
1724 e9b78eeb Michael Niedermayer
    if (s->iformat->read_seek){
1725
        if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
1726
            return 0;
1727
    }
1728
    ie = &st->index_entries[index];
1729 aaec4e03 Baptiste Coudurier
    if ((ret = url_fseek(s->pb, ie->pos, SEEK_SET)) < 0)
1730
        return ret;
1731 8bcb147f Michael Niedermayer
    av_update_cur_dts(s, st, ie->timestamp);
1732 cdd5034f Michael Niedermayer
1733 fb2758c8 Fabrice Bellard
    return 0;
1734
}
1735
1736 3ba1438d Michael Niedermayer
int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
1737 fb2758c8 Fabrice Bellard
{
1738
    int ret;
1739 cdd5034f Michael Niedermayer
    AVStream *st;
1740 115329f1 Diego Biurrun
1741 972ffe62 Aurelien Jacobs
    ff_read_frame_flush(s);
1742 115329f1 Diego Biurrun
1743 3ba1438d Michael Niedermayer
    if(flags & AVSEEK_FLAG_BYTE)
1744
        return av_seek_frame_byte(s, stream_index, timestamp, flags);
1745 115329f1 Diego Biurrun
1746 cdd5034f Michael Niedermayer
    if(stream_index < 0){
1747
        stream_index= av_find_default_stream_index(s);
1748
        if(stream_index < 0)
1749
            return -1;
1750 115329f1 Diego Biurrun
1751 3ba1438d Michael Niedermayer
        st= s->streams[stream_index];
1752 eb497825 Nathan Kurz
       /* timestamp for default must be expressed in AV_TIME_BASE units */
1753 3ba1438d Michael Niedermayer
        timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
1754 cdd5034f Michael Niedermayer
    }
1755
1756 fb2758c8 Fabrice Bellard
    /* first, we try the format specific seek */
1757
    if (s->iformat->read_seek)
1758 3ba1438d Michael Niedermayer
        ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
1759 fb2758c8 Fabrice Bellard
    else
1760
        ret = -1;
1761
    if (ret >= 0) {
1762
        return 0;
1763
    }
1764 8d14a25c Michael Niedermayer
1765
    if(s->iformat->read_timestamp)
1766 3ba1438d Michael Niedermayer
        return av_seek_frame_binary(s, stream_index, timestamp, flags);
1767 8d14a25c Michael Niedermayer
    else
1768 3ba1438d Michael Niedermayer
        return av_seek_frame_generic(s, stream_index, timestamp, flags);
1769 fb2758c8 Fabrice Bellard
}
1770
1771 32d88592 Michael Niedermayer
int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
1772
{
1773
    if(min_ts > ts || max_ts < ts)
1774
        return -1;
1775
1776 972ffe62 Aurelien Jacobs
    ff_read_frame_flush(s);
1777 32d88592 Michael Niedermayer
1778
    if (s->iformat->read_seek2)
1779
        return s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags);
1780
1781
    if(s->iformat->read_timestamp){
1782
        //try to seek via read_timestamp()
1783
    }
1784
1785
    //Fallback to old API if new is not implemented but old is
1786
    //Note the old has somewat different sematics
1787
    if(s->iformat->read_seek || 1)
1788 85b4230f Michael Niedermayer
        return av_seek_frame(s, stream_index, ts, flags | (ts - min_ts > (uint64_t)(max_ts - ts) ? AVSEEK_FLAG_BACKWARD : 0));
1789 32d88592 Michael Niedermayer
1790
    // try some generic seek like av_seek_frame_generic() but with new ts semantics
1791
}
1792
1793 fb2758c8 Fabrice Bellard
/*******************************************************/
1794 12f996ed Fabrice Bellard
1795 e36bdf8b Daniel Kristjansson
/**
1796 49bd8e4b Måns Rullgård
 * Return TRUE if the stream has accurate duration in any stream.
1797 e36bdf8b Daniel Kristjansson
 *
1798 c1e8b678 Neil Brown
 * @return TRUE if the stream has accurate duration for at least one component.
1799 e36bdf8b Daniel Kristjansson
 */
1800 c1e8b678 Neil Brown
static int av_has_duration(AVFormatContext *ic)
1801 12f996ed Fabrice Bellard
{
1802
    int i;
1803
    AVStream *st;
1804
1805
    for(i = 0;i < ic->nb_streams; i++) {
1806
        st = ic->streams[i];
1807 c1e8b678 Neil Brown
        if (st->duration != AV_NOPTS_VALUE)
1808 12f996ed Fabrice Bellard
            return 1;
1809
    }
1810
    return 0;
1811
}
1812
1813 e36bdf8b Daniel Kristjansson
/**
1814
 * Estimate the stream timings from the one of each components.
1815
 *
1816
 * Also computes the global bitrate if possible.
1817
 */
1818 12f996ed Fabrice Bellard
static void av_update_stream_timings(AVFormatContext *ic)
1819
{
1820 c0df9d75 Michael Niedermayer
    int64_t start_time, start_time1, end_time, end_time1;
1821 c1e8b678 Neil Brown
    int64_t duration, duration1;
1822 12f996ed Fabrice Bellard
    int i;
1823
    AVStream *st;
1824
1825 f27a7268 Måns Rullgård
    start_time = INT64_MAX;
1826
    end_time = INT64_MIN;
1827 c1e8b678 Neil Brown
    duration = INT64_MIN;
1828 12f996ed Fabrice Bellard
    for(i = 0;i < ic->nb_streams; i++) {
1829
        st = ic->streams[i];
1830 7f938dd3 Aurelien Jacobs
        if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
1831 c0df9d75 Michael Niedermayer
            start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
1832
            if (start_time1 < start_time)
1833
                start_time = start_time1;
1834 12f996ed Fabrice Bellard
            if (st->duration != AV_NOPTS_VALUE) {
1835 c0df9d75 Michael Niedermayer
                end_time1 = start_time1
1836
                          + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1837 12f996ed Fabrice Bellard
                if (end_time1 > end_time)
1838
                    end_time = end_time1;
1839
            }
1840
        }
1841 c1e8b678 Neil Brown
        if (st->duration != AV_NOPTS_VALUE) {
1842
            duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1843
            if (duration1 > duration)
1844
                duration = duration1;
1845
        }
1846 12f996ed Fabrice Bellard
    }
1847 f27a7268 Måns Rullgård
    if (start_time != INT64_MAX) {
1848 12f996ed Fabrice Bellard
        ic->start_time = start_time;
1849 f27a7268 Måns Rullgård
        if (end_time != INT64_MIN) {
1850 c1e8b678 Neil Brown
            if (end_time - start_time > duration)
1851
                duration = end_time - start_time;
1852
        }
1853
    }
1854
    if (duration != INT64_MIN) {
1855
        ic->duration = duration;
1856
        if (ic->file_size > 0) {
1857 a85736f2 Diego Biurrun
            /* compute the bitrate */
1858 c1e8b678 Neil Brown
            ic->bit_rate = (double)ic->file_size * 8.0 * AV_TIME_BASE /
1859
                (double)ic->duration;
1860 12f996ed Fabrice Bellard
        }
1861
    }
1862
}
1863
1864
static void fill_all_stream_timings(AVFormatContext *ic)
1865
{
1866
    int i;
1867
    AVStream *st;
1868
1869
    av_update_stream_timings(ic);
1870
    for(i = 0;i < ic->nb_streams; i++) {
1871
        st = ic->streams[i];
1872
        if (st->start_time == AV_NOPTS_VALUE) {
1873 c0df9d75 Michael Niedermayer
            if(ic->start_time != AV_NOPTS_VALUE)
1874
                st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
1875
            if(ic->duration != AV_NOPTS_VALUE)
1876
                st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
1877 12f996ed Fabrice Bellard
        }
1878
    }
1879
}
1880
1881
static void av_estimate_timings_from_bit_rate(AVFormatContext *ic)
1882
{
1883
    int64_t filesize, duration;
1884
    int bit_rate, i;
1885
    AVStream *st;
1886
1887
    /* if bit_rate is already set, we believe it */
1888 9100d4d6 David Czech
    if (ic->bit_rate <= 0) {
1889 12f996ed Fabrice Bellard
        bit_rate = 0;
1890
        for(i=0;i<ic->nb_streams;i++) {
1891
            st = ic->streams[i];
1892 9100d4d6 David Czech
            if (st->codec->bit_rate > 0)
1893 01f4895c Michael Niedermayer
            bit_rate += st->codec->bit_rate;
1894 12f996ed Fabrice Bellard
        }
1895
        ic->bit_rate = bit_rate;
1896
    }
1897
1898
    /* if duration is already set, we believe it */
1899 115329f1 Diego Biurrun
    if (ic->duration == AV_NOPTS_VALUE &&
1900
        ic->bit_rate != 0 &&
1901 12f996ed Fabrice Bellard
        ic->file_size != 0)  {
1902
        filesize = ic->file_size;
1903
        if (filesize > 0) {
1904
            for(i = 0; i < ic->nb_streams; i++) {
1905
                st = ic->streams[i];
1906 c0df9d75 Michael Niedermayer
                duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
1907 9f32041d Neil Brown
                if (st->duration == AV_NOPTS_VALUE)
1908 12f996ed Fabrice Bellard
                    st->duration = duration;
1909
            }
1910
        }
1911
    }
1912
}
1913
1914
#define DURATION_MAX_READ_SIZE 250000
1915 411ff322 Michael Niedermayer
#define DURATION_MAX_RETRY 3
1916 12f996ed Fabrice Bellard
1917
/* only usable for MPEG-PS streams */
1918 bc5c918e Diego Biurrun
static void av_estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
1919 12f996ed Fabrice Bellard
{
1920
    AVPacket pkt1, *pkt = &pkt1;
1921
    AVStream *st;
1922
    int read_size, i, ret;
1923 3e4318bf Aurelien Jacobs
    int64_t end_time;
1924 12f996ed Fabrice Bellard
    int64_t filesize, offset, duration;
1925 411ff322 Michael Niedermayer
    int retry=0;
1926 115329f1 Diego Biurrun
1927 578688fa Luca Abeni
    ic->cur_st = NULL;
1928
1929
    /* flush packet queue */
1930
    flush_packet_queue(ic);
1931
1932 e99179de Aurelien Jacobs
    for (i=0; i<ic->nb_streams; i++) {
1933 578688fa Luca Abeni
        st = ic->streams[i];
1934 3e4318bf Aurelien Jacobs
        if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE)
1935 cc20679a Michael Niedermayer
            av_log(st->codec, AV_LOG_WARNING, "start time is not set in av_estimate_timings_from_pts\n");
1936
1937 578688fa Luca Abeni
        if (st->parser) {
1938
            av_parser_close(st->parser);
1939
            st->parser= NULL;
1940 3a41c2f7 Michael Niedermayer
            av_free_packet(&st->cur_pkt);
1941 578688fa Luca Abeni
        }
1942
    }
1943 115329f1 Diego Biurrun
1944 12f996ed Fabrice Bellard
    /* estimate the end time (duration) */
1945
    /* XXX: may need to support wrapping */
1946
    filesize = ic->file_size;
1947 411ff322 Michael Niedermayer
    end_time = AV_NOPTS_VALUE;
1948
    do{
1949
    offset = filesize - (DURATION_MAX_READ_SIZE<<retry);
1950 12f996ed Fabrice Bellard
    if (offset < 0)
1951
        offset = 0;
1952
1953 899681cd Björn Axelsson
    url_fseek(ic->pb, offset, SEEK_SET);
1954 12f996ed Fabrice Bellard
    read_size = 0;
1955
    for(;;) {
1956 411ff322 Michael Niedermayer
        if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0)))
1957 12f996ed Fabrice Bellard
            break;
1958 115329f1 Diego Biurrun
1959 cda6902d Michael Niedermayer
        do{
1960
            ret = av_read_packet(ic, pkt);
1961
        }while(ret == AVERROR(EAGAIN));
1962 12f996ed Fabrice Bellard
        if (ret != 0)
1963
            break;
1964
        read_size += pkt->size;
1965
        st = ic->streams[pkt->stream_index];
1966 bf494092 Neil Brown
        if (pkt->pts != AV_NOPTS_VALUE &&
1967 3e4318bf Aurelien Jacobs
            (st->start_time != AV_NOPTS_VALUE ||
1968
             st->first_dts  != AV_NOPTS_VALUE)) {
1969
            duration = end_time = pkt->pts;
1970
            if (st->start_time != AV_NOPTS_VALUE)  duration -= st->start_time;
1971
            else                                   duration -= st->first_dts;
1972 d30a8beb Michael Niedermayer
            if (duration < 0)
1973
                duration += 1LL<<st->pts_wrap_bits;
1974 12f996ed Fabrice Bellard
            if (duration > 0) {
1975
                if (st->duration == AV_NOPTS_VALUE ||
1976
                    st->duration < duration)
1977
                    st->duration = duration;
1978
            }
1979
        }
1980
        av_free_packet(pkt);
1981
    }
1982 411ff322 Michael Niedermayer
    }while(   end_time==AV_NOPTS_VALUE
1983
           && filesize > (DURATION_MAX_READ_SIZE<<retry)
1984
           && ++retry <= DURATION_MAX_RETRY);
1985 115329f1 Diego Biurrun
1986 c0df9d75 Michael Niedermayer
    fill_all_stream_timings(ic);
1987 12f996ed Fabrice Bellard
1988 899681cd Björn Axelsson
    url_fseek(ic->pb, old_offset, SEEK_SET);
1989 e99179de Aurelien Jacobs
    for (i=0; i<ic->nb_streams; i++) {
1990 df886e7e Michael Niedermayer
        st= ic->streams[i];
1991
        st->cur_dts= st->first_dts;
1992 635fbcb1 Michael Niedermayer
        st->last_IP_pts = AV_NOPTS_VALUE;
1993 df886e7e Michael Niedermayer
    }
1994 12f996ed Fabrice Bellard
}
1995
1996 bc5c918e Diego Biurrun
static void av_estimate_timings(AVFormatContext *ic, int64_t old_offset)
1997 12f996ed Fabrice Bellard
{
1998
    int64_t file_size;
1999
2000
    /* get the file size, if possible */
2001
    if (ic->iformat->flags & AVFMT_NOFILE) {
2002
        file_size = 0;
2003
    } else {
2004 899681cd Björn Axelsson
        file_size = url_fsize(ic->pb);
2005 12f996ed Fabrice Bellard
        if (file_size < 0)
2006
            file_size = 0;
2007
    }
2008
    ic->file_size = file_size;
2009
2010 ff70e601 Måns Rullgård
    if ((!strcmp(ic->iformat->name, "mpeg") ||
2011
         !strcmp(ic->iformat->name, "mpegts")) &&
2012 ceeacce6 Aurelien Jacobs
        file_size && !url_is_streamed(ic->pb)) {
2013 12f996ed Fabrice Bellard
        /* get accurate estimate from the PTSes */
2014 9ecf7fad Wolfram Gloger
        av_estimate_timings_from_pts(ic, old_offset);
2015 c1e8b678 Neil Brown
    } else if (av_has_duration(ic)) {
2016 a85736f2 Diego Biurrun
        /* at least one component has timings - we use them for all
2017 12f996ed Fabrice Bellard
           the components */
2018
        fill_all_stream_timings(ic);
2019
    } else {
2020 77ac76a3 Michael Niedermayer
        av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n");
2021 a85736f2 Diego Biurrun
        /* less precise: use bitrate info */
2022 12f996ed Fabrice Bellard
        av_estimate_timings_from_bit_rate(ic);
2023
    }
2024
    av_update_stream_timings(ic);
2025
2026
#if 0
2027
    {
2028
        int i;
2029
        AVStream *st;
2030
        for(i = 0;i < ic->nb_streams; i++) {
2031
            st = ic->streams[i];
2032 115329f1 Diego Biurrun
        printf("%d: start_time: %0.3f duration: %0.3f\n",
2033
               i, (double)st->start_time / AV_TIME_BASE,
2034 12f996ed Fabrice Bellard
               (double)st->duration / AV_TIME_BASE);
2035
        }
2036 115329f1 Diego Biurrun
        printf("stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
2037
               (double)ic->start_time / AV_TIME_BASE,
2038 12f996ed Fabrice Bellard
               (double)ic->duration / AV_TIME_BASE,
2039
               ic->bit_rate / 1000);
2040
    }
2041
#endif
2042
}
2043
2044 b9a281db Fabrice Bellard
static int has_codec_parameters(AVCodecContext *enc)
2045
{
2046
    int val;
2047
    switch(enc->codec_type) {
2048 72415b2a Stefano Sabatini
    case AVMEDIA_TYPE_AUDIO:
2049 5d6e4c16 Stefano Sabatini
        val = enc->sample_rate && enc->channels && enc->sample_fmt != AV_SAMPLE_FMT_NONE;
2050 f3b5a1a2 Baptiste Coudurier
        if(!enc->frame_size &&
2051
           (enc->codec_id == CODEC_ID_VORBIS ||
2052 1d07029f Justin Ruggles
            enc->codec_id == CODEC_ID_AAC ||
2053 b7884740 Michael Niedermayer
            enc->codec_id == CODEC_ID_MP1 ||
2054
            enc->codec_id == CODEC_ID_MP2 ||
2055 8425ceca Baptiste Coudurier
            enc->codec_id == CODEC_ID_MP3 ||
2056 1d07029f Justin Ruggles
            enc->codec_id == CODEC_ID_SPEEX))
2057 4d35bf74 Michael Niedermayer
            return 0;
2058 b9a281db Fabrice Bellard
        break;
2059 72415b2a Stefano Sabatini
    case AVMEDIA_TYPE_VIDEO:
2060 644a9262 Michael Niedermayer
        val = enc->width && enc->pix_fmt != PIX_FMT_NONE;
2061 b9a281db Fabrice Bellard
        break;
2062
    default:
2063
        val = 1;
2064
        break;
2065
    }
2066 ccd425e7 Diego Biurrun
    return enc->codec_id != CODEC_ID_NONE && val != 0;
2067 b9a281db Fabrice Bellard
}
2068
2069 ae447836 Baptiste Coudurier
static int has_decode_delay_been_guessed(AVStream *st)
2070
{
2071
    return st->codec->codec_id != CODEC_ID_H264 ||
2072 581ba2ce Baptiste Coudurier
        st->codec_info_nb_frames >= 6 + st->codec->has_b_frames;
2073 ae447836 Baptiste Coudurier
}
2074
2075 655d47c2 Thilo Borgmann
static int try_decode_frame(AVStream *st, AVPacket *avpkt)
2076 fb2758c8 Fabrice Bellard
{
2077
    int16_t *samples;
2078
    AVCodec *codec;
2079 3fdb6af9 Baptiste Coudurier
    int got_picture, data_size, ret=0;
2080 fb2758c8 Fabrice Bellard
    AVFrame picture;
2081 115329f1 Diego Biurrun
2082 e472ea34 Baptiste Coudurier
    if(!st->codec->codec){
2083
        codec = avcodec_find_decoder(st->codec->codec_id);
2084
        if (!codec)
2085
            return -1;
2086
        ret = avcodec_open(st->codec, codec);
2087
        if (ret < 0)
2088
            return ret;
2089
    }
2090 644a9262 Michael Niedermayer
2091 ae447836 Baptiste Coudurier
    if(!has_codec_parameters(st->codec) || !has_decode_delay_been_guessed(st)){
2092 e472ea34 Baptiste Coudurier
        switch(st->codec->codec_type) {
2093 72415b2a Stefano Sabatini
        case AVMEDIA_TYPE_VIDEO:
2094 1bd280f7 Baptiste Coudurier
            avcodec_get_frame_defaults(&picture);
2095 e472ea34 Baptiste Coudurier
            ret = avcodec_decode_video2(st->codec, &picture,
2096
                                        &got_picture, avpkt);
2097
            break;
2098 72415b2a Stefano Sabatini
        case AVMEDIA_TYPE_AUDIO:
2099 e472ea34 Baptiste Coudurier
            data_size = FFMAX(avpkt->size, AVCODEC_MAX_AUDIO_FRAME_SIZE);
2100
            samples = av_malloc(data_size);
2101
            if (!samples)
2102
                goto fail;
2103
            ret = avcodec_decode_audio3(st->codec, samples,
2104
                                        &data_size, avpkt);
2105
            av_free(samples);
2106
            break;
2107
        default:
2108
            break;
2109
        }
2110 fb2758c8 Fabrice Bellard
    }
2111
 fail:
2112
    return ret;
2113
}
2114
2115 83c27079 Stefano Sabatini
unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum CodecID id)
2116 45da8124 Aurelien Jacobs
{
2117
    while (tags->id != CODEC_ID_NONE) {
2118
        if (tags->id == id)
2119
            return tags->tag;
2120
        tags++;
2121
    }
2122
    return 0;
2123
}
2124
2125 1a40491e Daniel Verkamp
enum CodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
2126 45da8124 Aurelien Jacobs
{
2127 41415d28 Michael Niedermayer
    int i;
2128
    for(i=0; tags[i].id != CODEC_ID_NONE;i++) {
2129
        if(tag == tags[i].tag)
2130
            return tags[i].id;
2131
    }
2132
    for(i=0; tags[i].id != CODEC_ID_NONE; i++) {
2133 603a5f04 Francesco Lavra
        if (ff_toupper4(tag) == ff_toupper4(tags[i].tag))
2134 41415d28 Michael Niedermayer
            return tags[i].id;
2135 45da8124 Aurelien Jacobs
    }
2136
    return CODEC_ID_NONE;
2137
}
2138
2139 15545a09 Stefano Sabatini
unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum CodecID id)
2140 45da8124 Aurelien Jacobs
{
2141
    int i;
2142
    for(i=0; tags && tags[i]; i++){
2143 1a40491e Daniel Verkamp
        int tag= ff_codec_get_tag(tags[i], id);
2144 45da8124 Aurelien Jacobs
        if(tag) return tag;
2145
    }
2146
    return 0;
2147
}
2148
2149 15545a09 Stefano Sabatini
enum CodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag)
2150 45da8124 Aurelien Jacobs
{
2151
    int i;
2152
    for(i=0; tags && tags[i]; i++){
2153 1a40491e Daniel Verkamp
        enum CodecID id= ff_codec_get_id(tags[i], tag);
2154 45da8124 Aurelien Jacobs
        if(id!=CODEC_ID_NONE) return id;
2155
    }
2156
    return CODEC_ID_NONE;
2157
}
2158
2159 c2c3dedf Aurelien Jacobs
static void compute_chapters_end(AVFormatContext *s)
2160
{
2161
    unsigned int i;
2162
2163
    for (i=0; i+1<s->nb_chapters; i++)
2164
        if (s->chapters[i]->end == AV_NOPTS_VALUE) {
2165
            assert(s->chapters[i]->start <= s->chapters[i+1]->start);
2166
            assert(!av_cmp_q(s->chapters[i]->time_base, s->chapters[i+1]->time_base));
2167
            s->chapters[i]->end = s->chapters[i+1]->start;
2168
        }
2169
2170
    if (s->nb_chapters && s->chapters[i]->end == AV_NOPTS_VALUE) {
2171
        assert(s->start_time != AV_NOPTS_VALUE);
2172
        assert(s->duration > 0);
2173
        s->chapters[i]->end = av_rescale_q(s->start_time + s->duration,
2174
                                           AV_TIME_BASE_Q,
2175
                                           s->chapters[i]->time_base);
2176
    }
2177
}
2178
2179 4d43cbcc Michael Niedermayer
static int get_std_framerate(int i){
2180
    if(i<60*12) return i*1001;
2181 aecf157e Reimar Döffinger
    else        return ((const int[]){24,30,60,12,15})[i-60*12]*1000*12;
2182 4d43cbcc Michael Niedermayer
}
2183
2184 945208ca Michael Niedermayer
/*
2185
 * Is the time base unreliable.
2186
 * This is a heuristic to balance between quick acceptance of the values in
2187
 * the headers vs. some extra checks.
2188 a85736f2 Diego Biurrun
 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
2189
 * MPEG-2 commonly misuses field repeat flags to store different framerates.
2190 945208ca Michael Niedermayer
 * And there are "variable" fps files this needs to detect as well.
2191
 */
2192
static int tb_unreliable(AVCodecContext *c){
2193
    if(   c->time_base.den >= 101L*c->time_base.num
2194
       || c->time_base.den <    5L*c->time_base.num
2195 2bb6eba2 Aurelien Jacobs
/*       || c->codec_tag == AV_RL32("DIVX")
2196
       || c->codec_tag == AV_RL32("XVID")*/
2197 7f123e7f Michael Niedermayer
       || c->codec_id == CODEC_ID_MPEG2VIDEO
2198
       || c->codec_id == CODEC_ID_H264
2199
       )
2200 945208ca Michael Niedermayer
        return 1;
2201
    return 0;
2202
}
2203
2204 b9a281db Fabrice Bellard
int av_find_stream_info(AVFormatContext *ic)
2205
{
2206 9f75260e Michael Niedermayer
    int i, count, ret, read_size, j;
2207 b9a281db Fabrice Bellard
    AVStream *st;
2208 fb2758c8 Fabrice Bellard
    AVPacket pkt1, *pkt;
2209 bc5c918e Diego Biurrun
    int64_t old_offset = url_ftell(ic->pb);
2210 0cbff027 Kristian Amlie
2211 c0df9d75 Michael Niedermayer
    for(i=0;i<ic->nb_streams;i++) {
2212 62784e37 Benjamin Larsson
        AVCodec *codec;
2213 c0df9d75 Michael Niedermayer
        st = ic->streams[i];
2214 e7e291e9 Alex Converse
        if (st->codec->codec_id == CODEC_ID_AAC) {
2215
            st->codec->sample_rate = 0;
2216
            st->codec->frame_size = 0;
2217
            st->codec->channels = 0;
2218
        }
2219 b3c0fc76 Aurelien Jacobs
        if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2220
            st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2221 c0df9d75 Michael Niedermayer
/*            if(!st->time_base.num)
2222
                st->time_base= */
2223 01f4895c Michael Niedermayer
            if(!st->codec->time_base.num)
2224
                st->codec->time_base= st->time_base;
2225 c0df9d75 Michael Niedermayer
        }
2226 90ad92b3 Michael Niedermayer
        //only for the split stuff
2227 fe8344a2 Michael Niedermayer
        if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
2228 01f4895c Michael Niedermayer
            st->parser = av_parser_init(st->codec->codec_id);
2229 57004ff1 Aurelien Jacobs
            if(st->need_parsing == AVSTREAM_PARSE_HEADERS && st->parser){
2230 7cbaa7ba Michael Niedermayer
                st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
2231
            }
2232 90ad92b3 Michael Niedermayer
        }
2233 43e4d57f Michael Niedermayer
        assert(!st->codec->codec);
2234 62784e37 Benjamin Larsson
        codec = avcodec_find_decoder(st->codec->codec_id);
2235
2236
        /* Force decoding of at least one frame of codec data
2237
         * this makes sure the codec initializes the channel configuration
2238
         * and does not trust the values from the container.
2239
         */
2240
        if (codec && codec->capabilities & CODEC_CAP_CHANNEL_CONF)
2241
            st->codec->channels = 0;
2242
2243 cb2c971d Aurelien Jacobs
        /* Ensure that subtitle_header is properly set. */
2244
        if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
2245
            && codec && !st->codec->codec)
2246
            avcodec_open(st->codec, codec);
2247
2248 43e4d57f Michael Niedermayer
        //try to just open decoders, in case this is enough to get parameters
2249
        if(!has_codec_parameters(st->codec)){
2250 cb2c971d Aurelien Jacobs
            if (codec && !st->codec->codec)
2251 43e4d57f Michael Niedermayer
                avcodec_open(st->codec, codec);
2252
        }
2253 c0df9d75 Michael Niedermayer
    }
2254
2255 feb2440c Aurelien Jacobs
    for (i=0; i<ic->nb_streams; i++) {
2256 fd0368e7 Aurelien Jacobs
        ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
2257 15bc38e5 Michael Niedermayer
    }
2258 115329f1 Diego Biurrun
2259 b9a281db Fabrice Bellard
    count = 0;
2260
    read_size = 0;
2261
    for(;;) {
2262 1d14361d Michael Niedermayer
        if(url_interrupt_cb()){
2263
            ret= AVERROR(EINTR);
2264 71ee6515 Michael Niedermayer
            av_log(ic, AV_LOG_DEBUG, "interrupted\n");
2265 1d14361d Michael Niedermayer
            break;
2266
        }
2267
2268 b9a281db Fabrice Bellard
        /* check if one codec still needs to be handled */
2269
        for(i=0;i<ic->nb_streams;i++) {
2270
            st = ic->streams[i];
2271 01f4895c Michael Niedermayer
            if (!has_codec_parameters(st->codec))
2272 b9a281db Fabrice Bellard
                break;
2273 3e76d1b5 Michael Niedermayer
            /* variable fps and no guess at the real fps */
2274 0e5f33f2 Michael Niedermayer
            if(   tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num)
2275 fd0368e7 Aurelien Jacobs
               && st->info->duration_count<20 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2276 3e76d1b5 Michael Niedermayer
                break;
2277 01f4895c Michael Niedermayer
            if(st->parser && st->parser->parser->split && !st->codec->extradata)
2278 90ad92b3 Michael Niedermayer
                break;
2279 82583548 Michael Niedermayer
            if(st->first_dts == AV_NOPTS_VALUE)
2280
                break;
2281 b9a281db Fabrice Bellard
        }
2282
        if (i == ic->nb_streams) {
2283
            /* NOTE: if the format has no header, then we need to read
2284
               some packets to get most of the streams, so we cannot
2285
               stop here */
2286 fb2758c8 Fabrice Bellard
            if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
2287 b9a281db Fabrice Bellard
                /* if we found the info for all the codecs, we can stop */
2288
                ret = count;
2289 71ee6515 Michael Niedermayer
                av_log(ic, AV_LOG_DEBUG, "All info found\n");
2290 b9a281db Fabrice Bellard
                break;
2291
            }
2292 5fb83c38 Michael Niedermayer
        }
2293 35eab0c0 Michael Niedermayer
        /* we did not get all the codec info, but we read too much data */
2294 57011a13 Baptiste Coudurier
        if (read_size >= ic->probesize) {
2295 35eab0c0 Michael Niedermayer
            ret = count;
2296 9bbe9a0d Jai Menon
            av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit %d reached\n", ic->probesize);
2297 35eab0c0 Michael Niedermayer
            break;
2298
        }
2299 b9a281db Fabrice Bellard
2300 fb2758c8 Fabrice Bellard
        /* NOTE: a new stream can be added there if no header in file
2301
           (AVFMTCTX_NOHEADER) */
2302
        ret = av_read_frame_internal(ic, &pkt1);
2303 feb2440c Aurelien Jacobs
        if (ret < 0 && ret != AVERROR(EAGAIN)) {
2304 fb2758c8 Fabrice Bellard
            /* EOF or error */
2305
            ret = -1; /* we could not have all the codec parameters before EOF */
2306 e19456e3 Michael Niedermayer
            for(i=0;i<ic->nb_streams;i++) {
2307
                st = ic->streams[i];
2308 305ee50f Michael Niedermayer
                if (!has_codec_parameters(st->codec)){
2309
                    char buf[256];
2310
                    avcodec_string(buf, sizeof(buf), st->codec, 0);
2311 657eca1f Michael Niedermayer
                    av_log(ic, AV_LOG_WARNING, "Could not find codec parameters (%s)\n", buf);
2312 344a18c3 Måns Rullgård
                } else {
2313
                    ret = 0;
2314 305ee50f Michael Niedermayer
                }
2315 e19456e3 Michael Niedermayer
            }
2316 fb2758c8 Fabrice Bellard
            break;
2317
        }
2318
2319 feb2440c Aurelien Jacobs
        if (ret == AVERROR(EAGAIN))
2320
            continue;
2321
2322 5c5b1731 Måns Rullgård
        pkt= add_to_pktbuf(&ic->packet_buffer, &pkt1, &ic->packet_buffer_end);
2323 fd0368e7 Aurelien Jacobs
        if ((ret = av_dup_packet(pkt)) < 0)
2324
            goto find_stream_info_err;
2325 b9a281db Fabrice Bellard
2326 fb2758c8 Fabrice Bellard
        read_size += pkt->size;
2327 b9a281db Fabrice Bellard
2328
        st = ic->streams[pkt->stream_index];
2329 fd0368e7 Aurelien Jacobs
        if (st->codec_info_nb_frames>1) {
2330
            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) {
2331 657eca1f Michael Niedermayer
                av_log(ic, AV_LOG_WARNING, "max_analyze_duration reached\n");
2332 3a560188 Baptiste Coudurier
                break;
2333 71ee6515 Michael Niedermayer
            }
2334 fd0368e7 Aurelien Jacobs
            st->info->codec_info_duration += pkt->duration;
2335 3a560188 Baptiste Coudurier
        }
2336 cefe0607 Michael Niedermayer
        {
2337 fd0368e7 Aurelien Jacobs
            int64_t last = st->info->last_dts;
2338 3c150d16 Michael Niedermayer
            int64_t duration= pkt->dts - last;
2339
2340
            if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && duration>0){
2341 4d43cbcc Michael Niedermayer
                double dur= duration * av_q2d(st->time_base);
2342
2343 72415b2a Stefano Sabatini
//                if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2344 4d43cbcc Michael Niedermayer
//                    av_log(NULL, AV_LOG_ERROR, "%f\n", dur);
2345 fd0368e7 Aurelien Jacobs
                if (st->info->duration_count < 2)
2346
                    memset(st->info->duration_error, 0, sizeof(st->info->duration_error));
2347
                for (i=1; i<FF_ARRAY_ELEMS(st->info->duration_error); i++) {
2348 69c262d1 Michael Niedermayer
                    int framerate= get_std_framerate(i);
2349
                    int ticks= lrintf(dur*framerate/(1001*12));
2350
                    double error= dur - ticks*1001*12/(double)framerate;
2351 fd0368e7 Aurelien Jacobs
                    st->info->duration_error[i] += error*error;
2352 69c262d1 Michael Niedermayer
                }
2353 fd0368e7 Aurelien Jacobs
                st->info->duration_count++;
2354 85142724 Reimar Döffinger
                // ignore the first 4 values, they might have some random jitter
2355 fd0368e7 Aurelien Jacobs
                if (st->info->duration_count > 3)
2356
                    st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
2357 15bc38e5 Michael Niedermayer
            }
2358 fd0368e7 Aurelien Jacobs
            if (last == AV_NOPTS_VALUE || st->info->duration_count <= 1)
2359
                st->info->last_dts = pkt->dts;
2360 15bc38e5 Michael Niedermayer
        }
2361 01f4895c Michael Niedermayer
        if(st->parser && st->parser->parser->split && !st->codec->extradata){
2362
            int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
2363 90ad92b3 Michael Niedermayer
            if(i){
2364 01f4895c Michael Niedermayer
                st->codec->extradata_size= i;
2365 62c52121 Måns Rullgård
                st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
2366 01f4895c Michael Niedermayer
                memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
2367 62c52121 Måns Rullgård
                memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2368 90ad92b3 Michael Niedermayer
            }
2369
        }
2370 115329f1 Diego Biurrun
2371 fb2758c8 Fabrice Bellard
        /* if still no information, we try to open the codec and to
2372
           decompress the frame. We try to avoid that in most cases as
2373 a85736f2 Diego Biurrun
           it takes longer and uses more memory. For MPEG-4, we need to
2374
           decompress for QuickTime. */
2375 ae447836 Baptiste Coudurier
        if (!has_codec_parameters(st->codec) || !has_decode_delay_been_guessed(st))
2376 655d47c2 Thilo Borgmann
            try_decode_frame(st, pkt);
2377 115329f1 Diego Biurrun
2378 9d3fdf20 Baptiste Coudurier
        st->codec_info_nb_frames++;
2379 b9a281db Fabrice Bellard
        count++;
2380
    }
2381
2382 bd107136 Diego Biurrun
    // close codecs which were opened in try_decode_frame()
2383 43c0040a Michael Niedermayer
    for(i=0;i<ic->nb_streams;i++) {
2384
        st = ic->streams[i];
2385 01f4895c Michael Niedermayer
        if(st->codec->codec)
2386
            avcodec_close(st->codec);
2387 43c0040a Michael Niedermayer
    }
2388 b9a281db Fabrice Bellard
    for(i=0;i<ic->nb_streams;i++) {
2389
        st = ic->streams[i];
2390 fd0368e7 Aurelien Jacobs
        if (st->codec_info_nb_frames>2 && !st->avg_frame_rate.num && st->info->codec_info_duration)
2391 02b398ef Michael Niedermayer
            av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2392 6c6e6ef5 Michael Niedermayer
                     (st->codec_info_nb_frames-2)*(int64_t)st->time_base.den,
2393 fd0368e7 Aurelien Jacobs
                      st->info->codec_info_duration*(int64_t)st->time_base.num, 60000);
2394 72415b2a Stefano Sabatini
        if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2395 dd1c8f3e Luca Abeni
            if(st->codec->codec_id == CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample)
2396 01f4895c Michael Niedermayer
                st->codec->codec_tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
2397 15bc38e5 Michael Niedermayer
2398 85142724 Reimar Döffinger
            // the check for tb_unreliable() is not completely correct, since this is not about handling
2399
            // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
2400
            // ipmovie.c produces.
2401 fd0368e7 Aurelien Jacobs
            if (tb_unreliable(st->codec) && st->info->duration_count > 15 && st->info->duration_gcd > 1 && !st->r_frame_rate.num)
2402
                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);
2403
            if (st->info->duration_count && !st->r_frame_rate.num
2404 945208ca Michael Niedermayer
               && tb_unreliable(st->codec) /*&&
2405 a85736f2 Diego Biurrun
               //FIXME we should not special-case MPEG-2, but this needs testing with non-MPEG-2 ...
2406 fd0368e7 Aurelien Jacobs
               st->time_base.num*duration_sum[i]/st->info->duration_count*101LL > st->time_base.den*/){
2407 fe02d9e7 Reimar Döffinger
                int num = 0;
2408 4d43cbcc Michael Niedermayer
                double best_error= 2*av_q2d(st->time_base);
2409 fd0368e7 Aurelien Jacobs
                best_error = best_error*best_error*st->info->duration_count*1000*12*30;
2410 4d43cbcc Michael Niedermayer
2411 fd0368e7 Aurelien Jacobs
                for (j=1; j<FF_ARRAY_ELEMS(st->info->duration_error); j++) {
2412
                    double error = st->info->duration_error[j] * get_std_framerate(j);
2413 72415b2a Stefano Sabatini
//                    if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2414 4d43cbcc Michael Niedermayer
//                        av_log(NULL, AV_LOG_ERROR, "%f %f\n", get_std_framerate(j) / 12.0/1001, error);
2415 9f75260e Michael Niedermayer
                    if(error < best_error){
2416
                        best_error= error;
2417 fe02d9e7 Reimar Döffinger
                        num = get_std_framerate(j);
2418 9f75260e Michael Niedermayer
                    }
2419 3c150d16 Michael Niedermayer
                }
2420 fe02d9e7 Reimar Döffinger
                // do not increase frame rate by more than 1 % in order to match a standard rate.
2421
                if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate)))
2422
                    av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
2423 15bc38e5 Michael Niedermayer
            }
2424
2425 c0df9d75 Michael Niedermayer
            if (!st->r_frame_rate.num){
2426 5523d5f4 Michael Niedermayer
                if(    st->codec->time_base.den * (int64_t)st->time_base.num
2427 3797c74b Michael Niedermayer
                    <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t)st->time_base.den){
2428 5523d5f4 Michael Niedermayer
                    st->r_frame_rate.num = st->codec->time_base.den;
2429 3797c74b Michael Niedermayer
                    st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame;
2430 5523d5f4 Michael Niedermayer
                }else{
2431
                    st->r_frame_rate.num = st->time_base.den;
2432
                    st->r_frame_rate.den = st->time_base.num;
2433
                }
2434 14bea432 Michael Niedermayer
            }
2435 72415b2a Stefano Sabatini
        }else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2436 dd1c8f3e Luca Abeni
            if(!st->codec->bits_per_coded_sample)
2437
                st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id);
2438 b9a281db Fabrice Bellard
        }
2439 de6d9b64 Fabrice Bellard
    }
2440 b9a281db Fabrice Bellard
2441 9ecf7fad Wolfram Gloger
    av_estimate_timings(ic, old_offset);
2442 6fea687e John Donaghy
2443 c2c3dedf Aurelien Jacobs
    compute_chapters_end(ic);
2444
2445 e928649b Michael Niedermayer
#if 0
2446 a85736f2 Diego Biurrun
    /* correct DTS for B-frame streams with no timestamps */
2447 e928649b Michael Niedermayer
    for(i=0;i<ic->nb_streams;i++) {
2448
        st = ic->streams[i];
2449 72415b2a Stefano Sabatini
        if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2450 e928649b Michael Niedermayer
            if(b-frames){
2451
                ppktl = &ic->packet_buffer;
2452
                while(ppkt1){
2453
                    if(ppkt1->stream_index != i)
2454
                        continue;
2455
                    if(ppkt1->pkt->dts < 0)
2456
                        break;
2457
                    if(ppkt1->pkt->pts != AV_NOPTS_VALUE)
2458
                        break;
2459
                    ppkt1->pkt->dts -= delta;
2460
                    ppkt1= ppkt1->next;
2461
                }
2462
                if(ppkt1)
2463
                    continue;
2464
                st->cur_dts -= delta;
2465
            }
2466
        }
2467
    }
2468
#endif
2469 0cbff027 Kristian Amlie
2470 fd0368e7 Aurelien Jacobs
 find_stream_info_err:
2471
    for (i=0; i < ic->nb_streams; i++)
2472
        av_freep(&ic->streams[i]->info);
2473 b9a281db Fabrice Bellard
    return ret;
2474 de6d9b64 Fabrice Bellard
}
2475
2476 9128ae08 Nicolas George
static AVProgram *find_program_from_stream(AVFormatContext *ic, int s)
2477
{
2478
    int i, j;
2479
2480
    for (i = 0; i < ic->nb_programs; i++)
2481
        for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
2482
            if (ic->programs[i]->stream_index[j] == s)
2483
                return ic->programs[i];
2484
    return NULL;
2485
}
2486
2487
int av_find_best_stream(AVFormatContext *ic,
2488
                        enum AVMediaType type,
2489
                        int wanted_stream_nb,
2490
                        int related_stream,
2491
                        AVCodec **decoder_ret,
2492
                        int flags)
2493
{
2494
    int i, nb_streams = ic->nb_streams, stream_number = 0;
2495
    int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1;
2496
    unsigned *program = NULL;
2497
    AVCodec *decoder = NULL, *best_decoder = NULL;
2498
2499
    if (related_stream >= 0 && wanted_stream_nb < 0) {
2500
        AVProgram *p = find_program_from_stream(ic, related_stream);
2501
        if (p) {
2502
            program = p->stream_index;
2503
            nb_streams = p->nb_stream_indexes;
2504
        }
2505
    }
2506
    for (i = 0; i < nb_streams; i++) {
2507
        AVStream *st = ic->streams[program ? program[i] : i];
2508
        AVCodecContext *avctx = st->codec;
2509
        if (avctx->codec_type != type)
2510
            continue;
2511
        if (wanted_stream_nb >= 0 && stream_number++ != wanted_stream_nb)
2512
            continue;
2513
        if (decoder_ret) {
2514
            decoder = avcodec_find_decoder(ic->streams[i]->codec->codec_id);
2515
            if (!decoder) {
2516
                if (ret < 0)
2517
                    ret = AVERROR_DECODER_NOT_FOUND;
2518
                continue;
2519
            }
2520
        }
2521
        if (best_count >= st->codec_info_nb_frames)
2522
            continue;
2523
        best_count = st->codec_info_nb_frames;
2524
        ret = i;
2525
        best_decoder = decoder;
2526
        if (program && i == nb_streams - 1 && ret < 0) {
2527
            program = NULL;
2528
            nb_streams = ic->nb_streams;
2529
            i = 0; /* no related stream found, try again with everything */
2530
        }
2531
    }
2532
    if (decoder_ret)
2533
        *decoder_ret = best_decoder;
2534
    return ret;
2535
}
2536
2537 fb2758c8 Fabrice Bellard
/*******************************************************/
2538
2539
int av_read_play(AVFormatContext *s)
2540
{
2541 fa13095a Björn Axelsson
    if (s->iformat->read_play)
2542
        return s->iformat->read_play(s);
2543 fd2982a0 Aurelien Jacobs
    if (s->pb)
2544 502bdf68 Michael Niedermayer
        return av_url_read_fpause(s->pb, 0);
2545 fa13095a Björn Axelsson
    return AVERROR(ENOSYS);
2546 fb2758c8 Fabrice Bellard
}
2547
2548
int av_read_pause(AVFormatContext *s)
2549
{
2550 fa13095a Björn Axelsson
    if (s->iformat->read_pause)
2551
        return s->iformat->read_pause(s);
2552 fd2982a0 Aurelien Jacobs
    if (s->pb)
2553 502bdf68 Michael Niedermayer
        return av_url_read_fpause(s->pb, 1);
2554 fa13095a Björn Axelsson
    return AVERROR(ENOSYS);
2555 fb2758c8 Fabrice Bellard
}
2556
2557 2506fd54 Reimar Döffinger
void av_close_input_stream(AVFormatContext *s)
2558 de6d9b64 Fabrice Bellard
{
2559 81bd4119 Stefano Sabatini
    flush_packet_queue(s);
2560 b9a281db Fabrice Bellard
    if (s->iformat->read_close)
2561
        s->iformat->read_close(s);
2562 4ed68fdf Martin Storsjö
    avformat_free_context(s);
2563
}
2564
2565
void avformat_free_context(AVFormatContext *s)
2566
{
2567
    int i;
2568
    AVStream *st;
2569
2570 de6d9b64 Fabrice Bellard
    for(i=0;i<s->nb_streams;i++) {
2571 da24c5e3 Fabrice Bellard
        /* free all data in a stream component */
2572
        st = s->streams[i];
2573 fb2758c8 Fabrice Bellard
        if (st->parser) {
2574
            av_parser_close(st->parser);
2575 3a41c2f7 Michael Niedermayer
            av_free_packet(&st->cur_pkt);
2576 de6d9b64 Fabrice Bellard
        }
2577 094d9df7 Aurelien Jacobs
        av_metadata_free(&st->metadata);
2578 fb2758c8 Fabrice Bellard
        av_free(st->index_entries);
2579 a5e9102b Måns Rullgård
        av_free(st->codec->extradata);
2580 cb2c971d Aurelien Jacobs
        av_free(st->codec->subtitle_header);
2581 01f4895c Michael Niedermayer
        av_free(st->codec);
2582 54036be1 Aurelien Jacobs
#if FF_API_OLD_METADATA
2583 f8d7c9d3 Evgeniy Stepanov
        av_free(st->filename);
2584 827f7e28 Aurelien Jacobs
#endif
2585 ade8d8b9 Baptiste Coudurier
        av_free(st->priv_data);
2586 fd0368e7 Aurelien Jacobs
        av_free(st->info);
2587 fb2758c8 Fabrice Bellard
        av_free(st);
2588 de6d9b64 Fabrice Bellard
    }
2589 15afa396 Nico Sabbi
    for(i=s->nb_programs-1; i>=0; i--) {
2590 54036be1 Aurelien Jacobs
#if FF_API_OLD_METADATA
2591 15afa396 Nico Sabbi
        av_freep(&s->programs[i]->provider_name);
2592
        av_freep(&s->programs[i]->name);
2593 827f7e28 Aurelien Jacobs
#endif
2594 094d9df7 Aurelien Jacobs
        av_metadata_free(&s->programs[i]->metadata);
2595 526efa10 Nico Sabbi
        av_freep(&s->programs[i]->stream_index);
2596 15afa396 Nico Sabbi
        av_freep(&s->programs[i]);
2597
    }
2598 ceedda75 Michael Niedermayer
    av_freep(&s->programs);
2599 a8dbe951 Philip Gladstone
    av_freep(&s->priv_data);
2600 7c8202cc Michael Niedermayer
    while(s->nb_chapters--) {
2601 54036be1 Aurelien Jacobs
#if FF_API_OLD_METADATA
2602 7c8202cc Michael Niedermayer
        av_free(s->chapters[s->nb_chapters]->title);
2603 827f7e28 Aurelien Jacobs
#endif
2604 094d9df7 Aurelien Jacobs
        av_metadata_free(&s->chapters[s->nb_chapters]->metadata);
2605 7c8202cc Michael Niedermayer
        av_free(s->chapters[s->nb_chapters]);
2606 79d7836a Anton Khirnov
    }
2607
    av_freep(&s->chapters);
2608 094d9df7 Aurelien Jacobs
    av_metadata_free(&s->metadata);
2609 668338c5 Måns Rullgård
    av_freep(&s->key);
2610 1ea4f593 Fabrice Bellard
    av_free(s);
2611 de6d9b64 Fabrice Bellard
}
2612
2613 2506fd54 Reimar Döffinger
void av_close_input_file(AVFormatContext *s)
2614
{
2615
    ByteIOContext *pb = s->iformat->flags & AVFMT_NOFILE ? NULL : s->pb;
2616
    av_close_input_stream(s);
2617
    if (pb)
2618
        url_fclose(pb);
2619
}
2620
2621 b9a281db Fabrice Bellard
AVStream *av_new_stream(AVFormatContext *s, int id)
2622
{
2623
    AVStream *st;
2624 504ee036 Michael Niedermayer
    int i;
2625 61138c43 Aurelien Jacobs
2626
#if FF_API_MAX_STREAMS
2627
    if (s->nb_streams >= MAX_STREAMS){
2628
        av_log(s, AV_LOG_ERROR, "Too many streams\n");
2629
        return NULL;
2630
    }
2631
#else
2632 38aab35f Aurelien Jacobs
    AVStream **streams;
2633 b9a281db Fabrice Bellard
2634 38aab35f Aurelien Jacobs
    if (s->nb_streams >= INT_MAX/sizeof(*streams))
2635
        return NULL;
2636
    streams = av_realloc(s->streams, (s->nb_streams + 1) * sizeof(*streams));
2637
    if (!streams)
2638
        return NULL;
2639
    s->streams = streams;
2640
#endif
2641 b9a281db Fabrice Bellard
2642
    st = av_mallocz(sizeof(AVStream));
2643
    if (!st)
2644
        return NULL;
2645 fd0368e7 Aurelien Jacobs
    if (!(st->info = av_mallocz(sizeof(*st->info)))) {
2646
        av_free(st);
2647
        return NULL;
2648
    }
2649 115329f1 Diego Biurrun
2650 01f4895c Michael Niedermayer
    st->codec= avcodec_alloc_context();
2651 48091512 Fabrice Bellard
    if (s->iformat) {
2652
        /* no default bitrate if decoding */
2653 01f4895c Michael Niedermayer
        st->codec->bit_rate = 0;
2654 48091512 Fabrice Bellard
    }
2655 b9a281db Fabrice Bellard
    st->index = s->nb_streams;
2656
    st->id = id;
2657 12f996ed Fabrice Bellard
    st->start_time = AV_NOPTS_VALUE;
2658
    st->duration = AV_NOPTS_VALUE;
2659 6d77d9ac Michael Niedermayer
        /* we set the current DTS to 0 so that formats without any timestamps
2660
           but durations get some timestamps, formats with some unknown
2661
           timestamps have their first few packets buffered and the
2662
           timestamps corrected before they are returned to the user */
2663
    st->cur_dts = 0;
2664 82583548 Michael Niedermayer
    st->first_dts = AV_NOPTS_VALUE;
2665 86cb7e33 Baptiste Coudurier
    st->probe_packets = MAX_PROBE_PACKETS;
2666 9ee91c2f Michael Niedermayer
2667 a85736f2 Diego Biurrun
    /* default pts setting is MPEG-like */
2668 9ee91c2f Michael Niedermayer
    av_set_pts_info(st, 33, 1, 90000);
2669 635fbcb1 Michael Niedermayer
    st->last_IP_pts = AV_NOPTS_VALUE;
2670 504ee036 Michael Niedermayer
    for(i=0; i<MAX_REORDER_DELAY+1; i++)
2671
        st->pts_buffer[i]= AV_NOPTS_VALUE;
2672 27ca0a79 Ivan Schreter
    st->reference_dts = AV_NOPTS_VALUE;
2673 9ee91c2f Michael Niedermayer
2674 c30a4489 Aurelien Jacobs
    st->sample_aspect_ratio = (AVRational){0,1};
2675
2676 b9a281db Fabrice Bellard
    s->streams[s->nb_streams++] = st;
2677
    return st;
2678
}
2679
2680 15afa396 Nico Sabbi
AVProgram *av_new_program(AVFormatContext *ac, int id)
2681
{
2682
    AVProgram *program=NULL;
2683
    int i;
2684
2685
#ifdef DEBUG_SI
2686
    av_log(ac, AV_LOG_DEBUG, "new_program: id=0x%04x\n", id);
2687
#endif
2688
2689
    for(i=0; i<ac->nb_programs; i++)
2690
        if(ac->programs[i]->id == id)
2691
            program = ac->programs[i];
2692
2693
    if(!program){
2694
        program = av_mallocz(sizeof(AVProgram));
2695
        if (!program)
2696
            return NULL;
2697
        dynarray_add(&ac->programs, &ac->nb_programs, program);
2698
        program->discard = AVDISCARD_NONE;
2699
    }
2700
    program->id = id;
2701
2702
    return program;
2703
}
2704
2705 abd2256d Michael Niedermayer
AVChapter *ff_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
2706 79d7836a Anton Khirnov
{
2707 7a2a3e8e Michael Niedermayer
    AVChapter *chapter = NULL;
2708
    int i;
2709
2710 7c8202cc Michael Niedermayer
    for(i=0; i<s->nb_chapters; i++)
2711 7a2a3e8e Michael Niedermayer
        if(s->chapters[i]->id == id)
2712
            chapter = s->chapters[i];
2713
2714
    if(!chapter){
2715
        chapter= av_mallocz(sizeof(AVChapter));
2716 6b43e2c7 Michael Niedermayer
        if(!chapter)