?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Use a shared function to validate FLAC extradata.
[ffmpeg-lucabe.git] / libavformat / utils.c
blob073e6dacdcf59695df14e6273e8d8a796262334f
1 /*
2 * various utility functions for use within FFmpeg
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21 #include "avformat.h"
22 #include "internal.h"
23 #include "libavcodec/opt.h"
24 #include "metadata.h"
25 #include "libavutil/avstring.h"
26 #include "riff.h"
27 #include <sys/time.h>
28 #include <time.h>
29 #include <strings.h>
30
31 #undef NDEBUG
32 #include <assert.h>
33
34 /**
35 * @file libavformat/utils.c
36 * various utility functions for use within FFmpeg
37 */
38
39 unsigned avformat_version(void)
40 {
41 return LIBAVFORMAT_VERSION_INT;
42 }
43
44 /* fraction handling */
45
46 /**
47 * f = val + (num / den) + 0.5.
48 *
49 * 'num' is normalized so that it is such as 0 <= num < den.
50 *
51 * @param f fractional number
52 * @param val integer value
53 * @param num must be >= 0
54 * @param den must be >= 1
55 */
56 static void av_frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den)
57 {
58 num += (den >> 1);
59 if (num >= den) {
60 val += num / den;
61 num = num % den;
62 }
63 f->val = val;
64 f->num = num;
65 f->den = den;
66 }
67
68 /**
69 * Fractional addition to f: f = f + (incr / f->den).
70 *
71 * @param f fractional number
72 * @param incr increment, can be positive or negative
73 */
74 static void av_frac_add(AVFrac *f, int64_t incr)
75 {
76 int64_t num, den;
77
78 num = f->num + incr;
79 den = f->den;
80 if (num < 0) {
81 f->val += num / den;
82 num = num % den;
83 if (num < 0) {
84 num += den;
85 f->val--;
86 }
87 } else if (num >= den) {
88 f->val += num / den;
89 num = num % den;
90 }
91 f->num = num;
92 }
93
94 /** head of registered input format linked list */
95 AVInputFormat *first_iformat = NULL;
96 /** head of registered output format linked list */
97 AVOutputFormat *first_oformat = NULL;
98
99 AVInputFormat *av_iformat_next(AVInputFormat *f)
100 {
101 if(f) return f->next;
102 else return first_iformat;
103 }
104
105 AVOutputFormat *av_oformat_next(AVOutputFormat *f)
106 {
107 if(f) return f->next;
108 else return first_oformat;
109 }
110
111 void av_register_input_format(AVInputFormat *format)
112 {
113 AVInputFormat **p;
114 p = &first_iformat;
115 while (*p != NULL) p = &(*p)->next;
116 *p = format;
117 format->next = NULL;
118 }
119
120 void av_register_output_format(AVOutputFormat *format)
121 {
122 AVOutputFormat **p;
123 p = &first_oformat;
124 while (*p != NULL) p = &(*p)->next;
125 *p = format;
126 format->next = NULL;
127 }
128
129 int match_ext(const char *filename, const char *extensions)
130 {
131 const char *ext, *p;
132 char ext1[32], *q;
133
134 if(!filename)
135 return 0;
136
137 ext = strrchr(filename, '.');
138 if (ext) {
139 ext++;
140 p = extensions;
141 for(;;) {
142 q = ext1;
143 while (*p != '\0' && *p != ',' && q-ext1<sizeof(ext1)-1)
144 *q++ = *p++;
145 *q = '\0';
146 if (!strcasecmp(ext1, ext))
147 return 1;
148 if (*p == '\0')
149 break;
150 p++;
151 }
152 }
153 return 0;
154 }
155
156 static int match_format(const char *name, const char *names)
157 {
158 const char *p;
159 int len, namelen;
160
161 if (!name || !names)
162 return 0;
163
164 namelen = strlen(name);
165 while ((p = strchr(names, ','))) {
166 len = FFMAX(p - names, namelen);
167 if (!strncasecmp(name, names, len))
168 return 1;
169 names = p+1;
170 }
171 return !strcasecmp(name, names);
172 }
173
174 AVOutputFormat *guess_format(const char *short_name, const char *filename,
175 const char *mime_type)
176 {
177 AVOutputFormat *fmt, *fmt_found;
178 int score_max, score;
179
180 /* specific test for image sequences */
181 #if CONFIG_IMAGE2_MUXER
182 if (!short_name && filename &&
183 av_filename_number_test(filename) &&
184 av_guess_image2_codec(filename) != CODEC_ID_NONE) {
185 return guess_format("image2", NULL, NULL);
186 }
187 #endif
188 /* Find the proper file type. */
189 fmt_found = NULL;
190 score_max = 0;
191 fmt = first_oformat;
192 while (fmt != NULL) {
193 score = 0;
194 if (fmt->name && short_name && !strcmp(fmt->name, short_name))
195 score += 100;
196 if (fmt->mime_type && mime_type && !strcmp(fmt->mime_type, mime_type))
197 score += 10;
198 if (filename && fmt->extensions &&
199 match_ext(filename, fmt->extensions)) {
200 score += 5;
201 }
202 if (score > score_max) {
203 score_max = score;
204 fmt_found = fmt;
205 }
206 fmt = fmt->next;
207 }
208 return fmt_found;
209 }
210
211 AVOutputFormat *guess_stream_format(const char *short_name, const char *filename,
212 const char *mime_type)
213 {
214 AVOutputFormat *fmt = guess_format(short_name, filename, mime_type);
215
216 if (fmt) {
217 AVOutputFormat *stream_fmt;
218 char stream_format_name[64];
219
220 snprintf(stream_format_name, sizeof(stream_format_name), "%s_stream", fmt->name);
221 stream_fmt = guess_format(stream_format_name, NULL, NULL);
222
223 if (stream_fmt)
224 fmt = stream_fmt;
225 }
226
227 return fmt;
228 }
229
230 enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
231 const char *filename, const char *mime_type, enum CodecType type){
232 if(type == CODEC_TYPE_VIDEO){
233 enum CodecID codec_id= CODEC_ID_NONE;
234
235 #if CONFIG_IMAGE2_MUXER
236 if(!strcmp(fmt->name, "image2") || !strcmp(fmt->name, "image2pipe")){
237 codec_id= av_guess_image2_codec(filename);
238 }
239 #endif
240 if(codec_id == CODEC_ID_NONE)
241 codec_id= fmt->video_codec;
242 return codec_id;
243 }else if(type == CODEC_TYPE_AUDIO)
244 return fmt->audio_codec;
245 else
246 return CODEC_ID_NONE;
247 }
248
249 AVInputFormat *av_find_input_format(const char *short_name)
250 {
251 AVInputFormat *fmt;
252 for(fmt = first_iformat; fmt != NULL; fmt = fmt->next) {
253 if (match_format(short_name, fmt->name))
254 return fmt;
255 }
256 return NULL;
257 }
258
259 /* memory handling */
260
261 void av_destruct_packet(AVPacket *pkt)
262 {
263 av_free(pkt->data);
264 pkt->data = NULL; pkt->size = 0;
265 }
266
267 void av_init_packet(AVPacket *pkt)
268 {
269 pkt->pts = AV_NOPTS_VALUE;
270 pkt->dts = AV_NOPTS_VALUE;
271 pkt->pos = -1;
272 pkt->duration = 0;
273 pkt->convergence_duration = 0;
274 pkt->flags = 0;
275 pkt->stream_index = 0;
276 pkt->destruct= av_destruct_packet_nofree;
277 }
278
279 int av_new_packet(AVPacket *pkt, int size)
280 {
281 uint8_t *data;
282 if((unsigned)size > (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE)
283 return AVERROR(ENOMEM);
284 data = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
285 if (!data)
286 return AVERROR(ENOMEM);
287 memset(data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
288
289 av_init_packet(pkt);
290 pkt->data = data;
291 pkt->size = size;
292 pkt->destruct = av_destruct_packet;
293 return 0;
294 }
295
296 int av_get_packet(ByteIOContext *s, AVPacket *pkt, int size)
297 {
298 int ret= av_new_packet(pkt, size);
299
300 if(ret<0)
301 return ret;
302
303 pkt->pos= url_ftell(s);
304
305 ret= get_buffer(s, pkt->data, size);
306 if(ret<=0)
307 av_free_packet(pkt);
308 else
309 pkt->size= ret;
310
311 return ret;
312 }
313
314 int av_dup_packet(AVPacket *pkt)
315 {
316 if (((pkt->destruct == av_destruct_packet_nofree) || (pkt->destruct == NULL)) && pkt->data) {
317 uint8_t *data;
318 /* We duplicate the packet and don't forget to add the padding again. */
319 if((unsigned)pkt->size > (unsigned)pkt->size + FF_INPUT_BUFFER_PADDING_SIZE)
320 return AVERROR(ENOMEM);
321 data = av_malloc(pkt->size + FF_INPUT_BUFFER_PADDING_SIZE);
322 if (!data) {
323 return AVERROR(ENOMEM);
324 }
325 memcpy(data, pkt->data, pkt->size);
326 memset(data + pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
327 pkt->data = data;
328 pkt->destruct = av_destruct_packet;
329 }
330 return 0;
331 }
332
333 int av_filename_number_test(const char *filename)
334 {
335 char buf[1024];
336 return filename && (av_get_frame_filename(buf, sizeof(buf), filename, 1)>=0);
337 }
338
339 static AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max)
340 {
341 AVInputFormat *fmt1, *fmt;
342 int score;
343
344 fmt = NULL;
345 for(fmt1 = first_iformat; fmt1 != NULL; fmt1 = fmt1->next) {
346 if (!is_opened == !(fmt1->flags & AVFMT_NOFILE))
347 continue;
348 score = 0;
349 if (fmt1->read_probe) {
350 score = fmt1->read_probe(pd);
351 } else if (fmt1->extensions) {
352 if (match_ext(pd->filename, fmt1->extensions)) {
353 score = 50;
354 }
355 }
356 if (score > *score_max) {
357 *score_max = score;
358 fmt = fmt1;
359 }else if (score == *score_max)
360 fmt = NULL;
361 }
362 return fmt;
363 }
364
365 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened){
366 int score=0;
367 return av_probe_input_format2(pd, is_opened, &score);
368 }
369
370 static int set_codec_from_probe_data(AVStream *st, AVProbeData *pd, int score)
371 {
372 AVInputFormat *fmt;
373 fmt = av_probe_input_format2(pd, 1, &score);
374
375 if (fmt) {
376 if (!strcmp(fmt->name, "mp3")) {
377 st->codec->codec_id = CODEC_ID_MP3;
378 st->codec->codec_type = CODEC_TYPE_AUDIO;
379 } else if (!strcmp(fmt->name, "ac3")) {
380 st->codec->codec_id = CODEC_ID_AC3;
381 st->codec->codec_type = CODEC_TYPE_AUDIO;
382 } else if (!strcmp(fmt->name, "mpegvideo")) {
383 st->codec->codec_id = CODEC_ID_MPEG2VIDEO;
384 st->codec->codec_type = CODEC_TYPE_VIDEO;
385 } else if (!strcmp(fmt->name, "m4v")) {
386 st->codec->codec_id = CODEC_ID_MPEG4;
387 st->codec->codec_type = CODEC_TYPE_VIDEO;
388 } else if (!strcmp(fmt->name, "h264")) {
389 st->codec->codec_id = CODEC_ID_H264;
390 st->codec->codec_type = CODEC_TYPE_VIDEO;
391 }
392 }
393 return !!fmt;
394 }
395
396 /************************************************************/
397 /* input media file */
398
399 /**
400 * Open a media file from an IO stream. 'fmt' must be specified.
401 */
402 int av_open_input_stream(AVFormatContext **ic_ptr,
403 ByteIOContext *pb, const char *filename,
404 AVInputFormat *fmt, AVFormatParameters *ap)
405 {
406 int err;
407 AVFormatContext *ic;
408 AVFormatParameters default_ap;
409
410 if(!ap){
411 ap=&default_ap;
412 memset(ap, 0, sizeof(default_ap));
413 }
414
415 if(!ap->prealloced_context)
416 ic = avformat_alloc_context();
417 else
418 ic = *ic_ptr;
419 if (!ic) {
420 err = AVERROR(ENOMEM);
421 goto fail;
422 }
423 ic->iformat = fmt;
424 ic->pb = pb;
425 ic->duration = AV_NOPTS_VALUE;
426 ic->start_time = AV_NOPTS_VALUE;
427 av_strlcpy(ic->filename, filename, sizeof(ic->filename));
428
429 /* allocate private data */
430 if (fmt->priv_data_size > 0) {
431 ic->priv_data = av_mallocz(fmt->priv_data_size);
432 if (!ic->priv_data) {
433 err = AVERROR(ENOMEM);
434 goto fail;
435 }
436 } else {
437 ic->priv_data = NULL;
438 }
439
440 if (ic->iformat->read_header) {
441 err = ic->iformat->read_header(ic, ap);
442 if (err < 0)
443 goto fail;
444 }
445
446 if (pb && !ic->data_offset)
447 ic->data_offset = url_ftell(ic->pb);
448
449 #if LIBAVFORMAT_VERSION_MAJOR < 53
450 ff_metadata_demux_compat(ic);
451 #endif
452
453 *ic_ptr = ic;
454 return 0;
455 fail:
456 if (ic) {
457 int i;
458 av_freep(&ic->priv_data);
459 for(i=0;i<ic->nb_streams;i++) {
460 AVStream *st = ic->streams[i];
461 if (st) {
462 av_free(st->priv_data);
463 av_free(st->codec->extradata);
464 }
465 av_free(st);
466 }
467 }
468 av_free(ic);
469 *ic_ptr = NULL;
470 return err;
471 }
472
473 /** size of probe buffer, for guessing file type from file contents */
474 #define PROBE_BUF_MIN 2048
475 #define PROBE_BUF_MAX (1<<20)
476
477 int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
478 AVInputFormat *fmt,
479 int buf_size,
480 AVFormatParameters *ap)
481 {
482 int err, probe_size;
483 AVProbeData probe_data, *pd = &probe_data;
484 ByteIOContext *pb = NULL;
485
486 pd->filename = "";
487 if (filename)
488 pd->filename = filename;
489 pd->buf = NULL;
490 pd->buf_size = 0;
491
492 if (!fmt) {
493 /* guess format if no file can be opened */
494 fmt = av_probe_input_format(pd, 0);
495 }
496
497 /* Do not open file if the format does not need it. XXX: specific
498 hack needed to handle RTSP/TCP */
499 if (!fmt || !(fmt->flags & AVFMT_NOFILE)) {
500 /* if no file needed do not try to open one */
501 if ((err=url_fopen(&pb, filename, URL_RDONLY)) < 0) {
502 goto fail;
503 }
504 if (buf_size > 0) {
505 url_setbufsize(pb, buf_size);
506 }
507
508 for(probe_size= PROBE_BUF_MIN; probe_size<=PROBE_BUF_MAX && !fmt; probe_size<<=1){
509 int score= probe_size < PROBE_BUF_MAX ? AVPROBE_SCORE_MAX/4 : 0;
510 /* read probe data */
511 pd->buf= av_realloc(pd->buf, probe_size + AVPROBE_PADDING_SIZE);
512 pd->buf_size = get_buffer(pb, pd->buf, probe_size);
513 memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
514 if (url_fseek(pb, 0, SEEK_SET) < 0) {
515 url_fclose(pb);
516 if (url_fopen(&pb, filename, URL_RDONLY) < 0) {
517 pb = NULL;
518 err = AVERROR(EIO);
519 goto fail;
520 }
521 }
522 /* guess file format */
523 fmt = av_probe_input_format2(pd, 1, &score);
524 }
525 av_freep(&pd->buf);
526 }
527
528 /* if still no format found, error */
529 if (!fmt) {
530 err = AVERROR_NOFMT;
531 goto fail;
532 }
533
534 /* check filename in case an image number is expected */
535 if (fmt->flags & AVFMT_NEEDNUMBER) {
536 if (!av_filename_number_test(filename)) {
537 err = AVERROR_NUMEXPECTED;
538 goto fail;
539 }
540 }
541 err = av_open_input_stream(ic_ptr, pb, filename, fmt, ap);
542 if (err)
543 goto fail;
544 return 0;
545 fail:
546 av_freep(&pd->buf);
547 if (pb)
548 url_fclose(pb);
549 *ic_ptr = NULL;
550 return err;
551
552 }
553
554 /*******************************************************/
555
556 static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
557 AVPacketList **plast_pktl){
558 AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
559 if (!pktl)
560 return NULL;
561
562 if (*packet_buffer)
563 (*plast_pktl)->next = pktl;
564 else
565 *packet_buffer = pktl;
566
567 /* add the packet in the buffered packet list */
568 *plast_pktl = pktl;
569 pktl->pkt= *pkt;
570 return &pktl->pkt;
571 }
572
573 int av_read_packet(AVFormatContext *s, AVPacket *pkt)
574 {
575 int ret;
576 AVStream *st;
577
578 for(;;){
579 AVPacketList *pktl = s->raw_packet_buffer;
580
581 if (pktl) {
582 *pkt = pktl->pkt;
583 if(s->streams[pkt->stream_index]->codec->codec_id != CODEC_ID_PROBE){
584 s->raw_packet_buffer = pktl->next;
585 av_free(pktl);
586 return 0;
587 }
588 }
589
590 av_init_packet(pkt);
591 ret= s->iformat->read_packet(s, pkt);
592 if (ret < 0)
593 return ret;
594 st= s->streams[pkt->stream_index];
595
596 switch(st->codec->codec_type){
597 case CODEC_TYPE_VIDEO:
598 if(s->video_codec_id) st->codec->codec_id= s->video_codec_id;
599 break;
600 case CODEC_TYPE_AUDIO:
601 if(s->audio_codec_id) st->codec->codec_id= s->audio_codec_id;
602 break;
603 case CODEC_TYPE_SUBTITLE:
604 if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id;
605 break;
606 }
607
608 if(!pktl && st->codec->codec_id!=CODEC_ID_PROBE)
609 return ret;
610
611 add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end);
612
613 if(st->codec->codec_id == CODEC_ID_PROBE){
614 AVProbeData *pd = &st->probe_data;
615
616 pd->buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
617 memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size);
618 pd->buf_size += pkt->size;
619 memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
620
621 if(av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){
622 set_codec_from_probe_data(st, pd, 1);
623 if(st->codec->codec_id != CODEC_ID_PROBE){
624 pd->buf_size=0;
625 av_freep(&pd->buf);
626 }
627 }
628 }
629 }
630 }
631
632 /**********************************************************/
633
634 /**
635 * Get the number of samples of an audio frame. Return -1 on error.
636 */
637 static int get_audio_frame_size(AVCodecContext *enc, int size)
638 {
639 int frame_size;
640
641 if(enc->codec_id == CODEC_ID_VORBIS)
642 return -1;
643
644 if (enc->frame_size <= 1) {
645 int bits_per_sample = av_get_bits_per_sample(enc->codec_id);
646
647 if (bits_per_sample) {
648 if (enc->channels == 0)
649 return -1;
650 frame_size = (size << 3) / (bits_per_sample * enc->channels);
651 } else {
652 /* used for example by ADPCM codecs */
653 if (enc->bit_rate == 0)
654 return -1;
655 frame_size = (size * 8 * enc->sample_rate) / enc->bit_rate;
656 }
657 } else {
658 frame_size = enc->frame_size;
659 }
660 return frame_size;
661 }
662
663
664 /**
665 * Return the frame duration in seconds. Return 0 if not available.
666 */
667 static void compute_frame_duration(int *pnum, int *pden, AVStream *st,
668 AVCodecParserContext *pc, AVPacket *pkt)
669 {
670 int frame_size;
671
672 *pnum = 0;
673 *pden = 0;
674 switch(st->codec->codec_type) {
675 case CODEC_TYPE_VIDEO:
676 if(st->time_base.num*1000LL > st->time_base.den){
677 *pnum = st->time_base.num;
678 *pden = st->time_base.den;
679 }else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){
680 *pnum = st->codec->time_base.num;
681 *pden = st->codec->time_base.den;
682 if (pc && pc->repeat_pict) {
683 *pnum = (*pnum) * (1 + pc->repeat_pict);
684 }
685 }
686 break;
687 case CODEC_TYPE_AUDIO:
688 frame_size = get_audio_frame_size(st->codec, pkt->size);
689 if (frame_size < 0)
690 break;
691 *pnum = frame_size;
692 *pden = st->codec->sample_rate;
693 break;
694 default:
695 break;
696 }
697 }
698
699 static int is_intra_only(AVCodecContext *enc){
700 if(enc->codec_type == CODEC_TYPE_AUDIO){
701 return 1;
702 }else if(enc->codec_type == CODEC_TYPE_VIDEO){
703 switch(enc->codec_id){
704 case CODEC_ID_MJPEG:
705 case CODEC_ID_MJPEGB:
706 case CODEC_ID_LJPEG:
707 case CODEC_ID_RAWVIDEO:
708 case CODEC_ID_DVVIDEO:
709 case CODEC_ID_HUFFYUV:
710 case CODEC_ID_FFVHUFF:
711 case CODEC_ID_ASV1:
712 case CODEC_ID_ASV2:
713 case CODEC_ID_VCR1:
714 case CODEC_ID_DNXHD:
715 case CODEC_ID_JPEG2000:
716 return 1;
717 default: break;
718 }
719 }
720 return 0;
721 }
722
723 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
724 int64_t dts, int64_t pts)
725 {
726 AVStream *st= s->streams[stream_index];
727 AVPacketList *pktl= s->packet_buffer;
728
729 if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE)
730 return;
731
732 st->first_dts= dts - st->cur_dts;
733 st->cur_dts= dts;
734
735 for(; pktl; pktl= pktl->next){
736 if(pktl->pkt.stream_index != stream_index)
737 continue;
738 //FIXME think more about this check
739 if(pktl->pkt.pts != AV_NOPTS_VALUE && pktl->pkt.pts == pktl->pkt.dts)
740 pktl->pkt.pts += st->first_dts;
741
742 if(pktl->pkt.dts != AV_NOPTS_VALUE)
743 pktl->pkt.dts += st->first_dts;
744
745 if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
746 st->start_time= pktl->pkt.pts;
747 }
748 if (st->start_time == AV_NOPTS_VALUE)
749 st->start_time = pts;
750 }
751
752 static void update_initial_durations(AVFormatContext *s, AVStream *st, AVPacket *pkt)
753 {
754 AVPacketList *pktl= s->packet_buffer;
755 int64_t cur_dts= 0;
756
757 if(st->first_dts != AV_NOPTS_VALUE){
758 cur_dts= st->first_dts;
759 for(; pktl; pktl= pktl->next){
760 if(pktl->pkt.stream_index == pkt->stream_index){
761 if(pktl->pkt.pts != pktl->pkt.dts || pktl->pkt.dts != AV_NOPTS_VALUE || pktl->pkt.duration)
762 break;
763 cur_dts -= pkt->duration;
764 }
765 }
766 pktl= s->packet_buffer;
767 st->first_dts = cur_dts;
768 }else if(st->cur_dts)
769 return;
770
771 for(; pktl; pktl= pktl->next){
772 if(pktl->pkt.stream_index != pkt->stream_index)
773 continue;
774 if(pktl->pkt.pts == pktl->pkt.dts && pktl->pkt.dts == AV_NOPTS_VALUE
775 && !pktl->pkt.duration){
776 pktl->pkt.dts= cur_dts;
777 if(!st->codec->has_b_frames)
778 pktl->pkt.pts= cur_dts;
779 cur_dts += pkt->duration;
780 pktl->pkt.duration= pkt->duration;
781 }else
782 break;
783 }
784 if(st->first_dts == AV_NOPTS_VALUE)
785 st->cur_dts= cur_dts;
786 }
787
788 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
789 AVCodecParserContext *pc, AVPacket *pkt)
790 {
791 int num, den, presentation_delayed, delay, i;
792 int64_t offset;
793
794 /* do we have a video B-frame ? */
795 delay= st->codec->has_b_frames;
796 presentation_delayed = 0;
797 /* XXX: need has_b_frame, but cannot get it if the codec is
798 not initialized */
799 if (delay &&
800 pc && pc->pict_type != FF_B_TYPE)
801 presentation_delayed = 1;
802
803 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && pkt->dts > pkt->pts && st->pts_wrap_bits<63
804 /*&& pkt->dts-(1LL<<st->pts_wrap_bits) < pkt->pts*/){
805 pkt->dts -= 1LL<<st->pts_wrap_bits;
806 }
807
808 // some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg)
809 // we take the conservative approach and discard both
810 // Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly.
811 if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){
812 av_log(s, AV_LOG_WARNING, "invalid dts/pts combination\n");
813 pkt->dts= pkt->pts= AV_NOPTS_VALUE;
814 }
815
816 if (pkt->duration == 0) {
817 compute_frame_duration(&num, &den, st, pc, pkt);
818 if (den && num) {
819 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num);
820
821 if(pkt->duration != 0 && s->packet_buffer)
822 update_initial_durations(s, st, pkt);
823 }
824 }
825
826 /* correct timestamps with byte offset if demuxers only have timestamps
827 on packet boundaries */
828 if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){
829 /* this will estimate bitrate based on this frame's duration and size */
830 offset = av_rescale(pc->offset, pkt->duration, pkt->size);
831 if(pkt->pts != AV_NOPTS_VALUE)
832 pkt->pts += offset;
833 if(pkt->dts != AV_NOPTS_VALUE)
834 pkt->dts += offset;
835 }
836
837 if (pc && pc->dts_sync_point >= 0) {
838 // we have synchronization info from the parser
839 int64_t den = st->codec->time_base.den * (int64_t) st->time_base.num;
840 if (den > 0) {
841 int64_t num = st->codec->time_base.num * (int64_t) st->time_base.den;
842 if (pkt->dts != AV_NOPTS_VALUE) {
843 // got DTS from the stream, update reference timestamp
844 st->reference_dts = pkt->dts - pc->dts_ref_dts_delta * num / den;
845 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
846 } else if (st->reference_dts != AV_NOPTS_VALUE) {
847 // compute DTS based on reference timestamp
848 pkt->dts = st->reference_dts + pc->dts_ref_dts_delta * num / den;
849 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
850 }
851 if (pc->dts_sync_point > 0)
852 st->reference_dts = pkt->dts; // new reference
853 }
854 }
855
856 /* This may be redundant, but it should not hurt. */
857 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
858 presentation_delayed = 1;
859
860 // 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);
861 /* interpolate PTS and DTS if they are not present */
862 if(delay==0 || (delay==1 && pc)){
863 if (presentation_delayed) {
864 /* DTS = decompression timestamp */
865 /* PTS = presentation timestamp */
866 if (pkt->dts == AV_NOPTS_VALUE)
867 pkt->dts = st->last_IP_pts;
868 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts);
869 if (pkt->dts == AV_NOPTS_VALUE)
870 pkt->dts = st->cur_dts;
871
872 /* this is tricky: the dts must be incremented by the duration
873 of the frame we are displaying, i.e. the last I- or P-frame */
874 if (st->last_IP_duration == 0)
875 st->last_IP_duration = pkt->duration;
876 if(pkt->dts != AV_NOPTS_VALUE)
877 st->cur_dts = pkt->dts + st->last_IP_duration;
878 st->last_IP_duration = pkt->duration;
879 st->last_IP_pts= pkt->pts;
880 /* cannot compute PTS if not present (we can compute it only
881 by knowing the future */
882 } else if(pkt->pts != AV_NOPTS_VALUE || pkt->dts != AV_NOPTS_VALUE || pkt->duration){
883 if(pkt->pts != AV_NOPTS_VALUE && pkt->duration){
884 int64_t old_diff= FFABS(st->cur_dts - pkt->duration - pkt->pts);
885 int64_t new_diff= FFABS(st->cur_dts - pkt->pts);
886 if(old_diff < new_diff && old_diff < (pkt->duration>>3)){
887 pkt->pts += pkt->duration;
888 // 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);
889 }
890 }
891
892 /* presentation is not delayed : PTS and DTS are the same */
893 if(pkt->pts == AV_NOPTS_VALUE)
894 pkt->pts = pkt->dts;
895 update_initial_timestamps(s, pkt->stream_index, pkt->pts, pkt->pts);
896 if(pkt->pts == AV_NOPTS_VALUE)
897 pkt->pts = st->cur_dts;
898 pkt->dts = pkt->pts;
899 if(pkt->pts != AV_NOPTS_VALUE)
900 st->cur_dts = pkt->pts + pkt->duration;
901 }
902 }
903
904 if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
905 st->pts_buffer[0]= pkt->pts;
906 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
907 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
908 if(pkt->dts == AV_NOPTS_VALUE)
909 pkt->dts= st->pts_buffer[0];
910 if(delay>1){
911 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); // this should happen on the first packet
912 }
913 if(pkt->dts > st->cur_dts)
914 st->cur_dts = pkt->dts;
915 }
916
917 // 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);
918
919 /* update flags */
920 if(is_intra_only(st->codec))
921 pkt->flags |= PKT_FLAG_KEY;
922 else if (pc) {
923 pkt->flags = 0;
924 /* keyframe computation */
925 if (pc->key_frame == 1)
926 pkt->flags |= PKT_FLAG_KEY;
927 else if (pc->key_frame == -1 && pc->pict_type == FF_I_TYPE)
928 pkt->flags |= PKT_FLAG_KEY;
929 }
930 if (pc)
931 pkt->convergence_duration = pc->convergence_duration;
932 }
933
934 void av_destruct_packet_nofree(AVPacket *pkt)
935 {
936 pkt->data = NULL; pkt->size = 0;
937 }
938
939 static int av_read_frame_internal(AVFormatContext *s, AVPacket *pkt)
940 {
941 AVStream *st;
942 int len, ret, i;
943
944 av_init_packet(pkt);
945
946 for(;;) {
947 /* select current input stream component */
948 st = s->cur_st;
949 if (st) {
950 if (!st->need_parsing || !st->parser) {
951 /* no parsing needed: we just output the packet as is */
952 /* raw data support */
953 *pkt = st->cur_pkt; st->cur_pkt.data= NULL;
954 compute_pkt_fields(s, st, NULL, pkt);
955 s->cur_st = NULL;
956 break;
957 } else if (st->cur_len > 0 && st->discard < AVDISCARD_ALL) {
958 len = av_parser_parse(st->parser, st->codec, &pkt->data, &pkt->size,
959 st->cur_ptr, st->cur_len,
960 st->cur_pkt.pts, st->cur_pkt.dts);
961 st->cur_pkt.pts = AV_NOPTS_VALUE;
962 st->cur_pkt.dts = AV_NOPTS_VALUE;
963 /* increment read pointer */
964 st->cur_ptr += len;
965 st->cur_len -= len;
966
967 /* return packet if any */
968 if (pkt->size) {
969 pkt->pos = st->cur_pkt.pos; // Isn't quite accurate but close.
970 got_packet:
971 pkt->duration = 0;
972 pkt->stream_index = st->index;
973 pkt->pts = st->parser->pts;
974 pkt->dts = st->parser->dts;
975 pkt->destruct = av_destruct_packet_nofree;
976 compute_pkt_fields(s, st, st->parser, pkt);
977
978 if((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & PKT_FLAG_KEY){
979 ff_reduce_index(s, st->index);
980 av_add_index_entry(st, st->parser->frame_offset, pkt->dts,
981 0, 0, AVINDEX_KEYFRAME);
982 }
983
984 break;
985 }
986 } else {
987 /* free packet */
988 av_free_packet(&st->cur_pkt);
989 s->cur_st = NULL;
990 }
991 } else {
992 AVPacket cur_pkt;
993 /* read next packet */
994 ret = av_read_packet(s, &cur_pkt);
995 if (ret < 0) {
996 if (ret == AVERROR(EAGAIN))
997 return ret;
998 /* return the last frames, if any */
999 for(i = 0; i < s->nb_streams; i++) {
1000 st = s->streams[i];
1001 if (st->parser && st->need_parsing) {
1002 av_parser_parse(st->parser, st->codec,
1003 &pkt->data, &pkt->size,
1004 NULL, 0,
1005 AV_NOPTS_VALUE, AV_NOPTS_VALUE);
1006 if (pkt->size)
1007 goto got_packet;
1008 }
1009 }
1010 /* no more packets: really terminate parsing */
1011 return ret;
1012 }
1013 st = s->streams[cur_pkt.stream_index];
1014 st->cur_pkt= cur_pkt;
1015
1016 if(st->cur_pkt.pts != AV_NOPTS_VALUE &&
1017 st->cur_pkt.dts != AV_NOPTS_VALUE &&
1018 st->cur_pkt.pts < st->cur_pkt.dts){
1019 av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d\n",
1020 st->cur_pkt.stream_index,
1021 st->cur_pkt.pts,
1022 st->cur_pkt.dts,
1023 st->cur_pkt.size);
1024 // av_free_packet(&st->cur_pkt);
1025 // return -1;
1026 }
1027
1028 if(s->debug & FF_FDEBUG_TS)
1029 av_log(s, AV_LOG_DEBUG, "av_read_packet stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, flags=%d\n",
1030 st->cur_pkt.stream_index,
1031 st->cur_pkt.pts,
1032 st->cur_pkt.dts,
1033 st->cur_pkt.size,
1034 st->cur_pkt.flags);
1035
1036 s->cur_st = st;
1037 st->cur_ptr = st->cur_pkt.data;
1038 st->cur_len = st->cur_pkt.size;
1039 if (st->need_parsing && !st->parser) {
1040 st->parser = av_parser_init(st->codec->codec_id);
1041 if (!st->parser) {
1042 /* no parser available: just output the raw packets */
1043 st->need_parsing = AVSTREAM_PARSE_NONE;
1044 }else if(st->need_parsing == AVSTREAM_PARSE_HEADERS){
1045 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1046 }
1047 if(st->parser && (s->iformat->flags & AVFMT_GENERIC_INDEX)){
1048 st->parser->next_frame_offset=
1049 st->parser->cur_offset= st->cur_pkt.pos;
1050 }
1051 }
1052 }
1053 }
1054 if(s->debug & FF_FDEBUG_TS)
1055 av_log(s, AV_LOG_DEBUG, "av_read_frame_internal stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, flags=%d\n",
1056 pkt->stream_index,
1057 pkt->pts,
1058 pkt->dts,
1059 pkt->size,
1060 pkt->flags);
1061
1062 return 0;
1063 }
1064
1065 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1066 {
1067 AVPacketList *pktl;
1068 int eof=0;
1069 const int genpts= s->flags & AVFMT_FLAG_GENPTS;
1070
1071 for(;;){
1072 pktl = s->packet_buffer;
1073 if (pktl) {
1074 AVPacket *next_pkt= &pktl->pkt;
1075
1076 if(genpts && next_pkt->dts != AV_NOPTS_VALUE){
1077 while(pktl && next_pkt->pts == AV_NOPTS_VALUE){
1078 if( pktl->pkt.stream_index == next_pkt->stream_index
1079 && next_pkt->dts < pktl->pkt.dts
1080 && pktl->pkt.pts != pktl->pkt.dts //not b frame
1081 /*&& pktl->pkt.dts != AV_NOPTS_VALUE*/){
1082 next_pkt->pts= pktl->pkt.dts;
1083 }
1084 pktl= pktl->next;
1085 }
1086 pktl = s->packet_buffer;
1087 }
1088
1089 if( next_pkt->pts != AV_NOPTS_VALUE
1090 || next_pkt->dts == AV_NOPTS_VALUE
1091 || !genpts || eof){
1092 /* read packet from packet buffer, if there is data */
1093 *pkt = *next_pkt;
1094 s->packet_buffer = pktl->next;
1095 av_free(pktl);
1096 return 0;
1097 }
1098 }
1099 if(genpts){
1100 int ret= av_read_frame_internal(s, pkt);
1101 if(ret<0){
1102 if(pktl && ret != AVERROR(EAGAIN)){
1103 eof=1;
1104 continue;
1105 }else
1106 return ret;
1107 }
1108
1109 if(av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
1110 &s->packet_buffer_end)) < 0)
1111 return AVERROR(ENOMEM);
1112 }else{
1113 assert(!s->packet_buffer);
1114 return av_read_frame_internal(s, pkt);
1115 }
1116 }
1117 }
1118
1119 /* XXX: suppress the packet queue */
1120 static void flush_packet_queue(AVFormatContext *s)
1121 {
1122 AVPacketList *pktl;
1123
1124 for(;;) {
1125 pktl = s->packet_buffer;
1126 if (!pktl)
1127 break;
1128 s->packet_buffer = pktl->next;
1129 av_free_packet(&pktl->pkt);
1130 av_free(pktl);
1131 }
1132 }
1133
1134 /*******************************************************/
1135 /* seek support */
1136
1137 int av_find_default_stream_index(AVFormatContext *s)
1138 {
1139 int first_audio_index = -1;
1140 int i;
1141 AVStream *st;
1142
1143 if (s->nb_streams <= 0)
1144 return -1;
1145 for(i = 0; i < s->nb_streams; i++) {
1146 st = s->streams[i];
1147 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
1148 return i;
1149 }
1150 if (first_audio_index < 0 && st->codec->codec_type == CODEC_TYPE_AUDIO)
1151 first_audio_index = i;
1152 }
1153 return first_audio_index >= 0 ? first_audio_index : 0;
1154 }
1155
1156 /**
1157 * Flush the frame reader.
1158 */
1159 static void av_read_frame_flush(AVFormatContext *s)
1160 {
1161 AVStream *st;
1162 int i;
1163
1164 flush_packet_queue(s);
1165
1166 s->cur_st = NULL;
1167
1168 /* for each stream, reset read state */
1169 for(i = 0; i < s->nb_streams; i++) {
1170 st = s->streams[i];
1171
1172 if (st->parser) {
1173 av_parser_close(st->parser);
1174 st->parser = NULL;
1175 av_free_packet(&st->cur_pkt);
1176 }
1177 st->last_IP_pts = AV_NOPTS_VALUE;
1178 st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
1179 st->reference_dts = AV_NOPTS_VALUE;
1180 /* fail safe */
1181 st->cur_ptr = NULL;
1182 st->cur_len = 0;
1183 }
1184 }
1185
1186 void av_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp){
1187 int i;
1188
1189 for(i = 0; i < s->nb_streams; i++) {
1190 AVStream *st = s->streams[i];
1191
1192 st->cur_dts = av_rescale(timestamp,
1193 st->time_base.den * (int64_t)ref_st->time_base.num,
1194 st->time_base.num * (int64_t)ref_st->time_base.den);
1195 }
1196 }
1197
1198 void ff_reduce_index(AVFormatContext *s, int stream_index)
1199 {
1200 AVStream *st= s->streams[stream_index];
1201 unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry);
1202
1203 if((unsigned)st->nb_index_entries >= max_entries){
1204 int i;
1205 for(i=0; 2*i<st->nb_index_entries; i++)
1206 st->index_entries[i]= st->index_entries[2*i];
1207 st->nb_index_entries= i;
1208 }
1209 }
1210
1211 int av_add_index_entry(AVStream *st,
1212 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1213 {
1214 AVIndexEntry *entries, *ie;
1215 int index;
1216
1217 if((unsigned)st->nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1218 return -1;
1219
1220 entries = av_fast_realloc(st->index_entries,
1221 &st->index_entries_allocated_size,
1222 (st->nb_index_entries + 1) *
1223 sizeof(AVIndexEntry));
1224 if(!entries)
1225 return -1;
1226
1227 st->index_entries= entries;
1228
1229 index= av_index_search_timestamp(st, timestamp, AVSEEK_FLAG_ANY);
1230
1231 if(index<0){
1232 index= st->nb_index_entries++;
1233 ie= &entries[index];
1234 assert(index==0 || ie[-1].timestamp < timestamp);
1235 }else{
1236 ie= &entries[index];
1237 if(ie->timestamp != timestamp){
1238 if(ie->timestamp <= timestamp)
1239 return -1;
1240 memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(st->nb_index_entries - index));
1241 st->nb_index_entries++;
1242 }else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance
1243 distance= ie->min_distance;
1244 }
1245
1246 ie->pos = pos;
1247 ie->timestamp = timestamp;
1248 ie->min_distance= distance;
1249 ie->size= size;
1250 ie->flags = flags;
1251
1252 return index;
1253 }
1254
1255 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
1256 int flags)
1257 {
1258 AVIndexEntry *entries= st->index_entries;
1259 int nb_entries= st->nb_index_entries;
1260 int a, b, m;
1261 int64_t timestamp;
1262
1263 a = - 1;
1264 b = nb_entries;
1265
1266 while (b - a > 1) {
1267 m = (a + b) >> 1;
1268 timestamp = entries[m].timestamp;
1269 if(timestamp >= wanted_timestamp)
1270 b = m;
1271 if(timestamp <= wanted_timestamp)
1272 a = m;
1273 }
1274 m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1275
1276 if(!(flags & AVSEEK_FLAG_ANY)){
1277 while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){
1278 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1279 }
1280 }
1281
1282 if(m == nb_entries)
1283 return -1;
1284 return m;
1285 }
1286
1287 #define DEBUG_SEEK
1288
1289 int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags){
1290 AVInputFormat *avif= s->iformat;
1291 int64_t pos_min, pos_max, pos, pos_limit;
1292 int64_t ts_min, ts_max, ts;
1293 int index;
1294 AVStream *st;
1295
1296 if (stream_index < 0)
1297 return -1;
1298
1299 #ifdef DEBUG_SEEK
1300 av_log(s, AV_LOG_DEBUG, "read_seek: %d %"PRId64"\n", stream_index, target_ts);
1301 #endif
1302
1303 ts_max=
1304 ts_min= AV_NOPTS_VALUE;
1305 pos_limit= -1; //gcc falsely says it may be uninitialized
1306
1307 st= s->streams[stream_index];
1308 if(st->index_entries){
1309 AVIndexEntry *e;
1310
1311 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()
1312 index= FFMAX(index, 0);
1313 e= &st->index_entries[index];
1314
1315 if(e->timestamp <= target_ts || e->pos == e->min_distance){
1316 pos_min= e->pos;
1317 ts_min= e->timestamp;
1318 #ifdef DEBUG_SEEK
1319 av_log(s, AV_LOG_DEBUG, "using cached pos_min=0x%"PRIx64" dts_min=%"PRId64"\n",
1320 pos_min,ts_min);
1321 #endif
1322 }else{
1323 assert(index==0);
1324 }
1325
1326 index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD);
1327 assert(index < st->nb_index_entries);
1328 if(index >= 0){
1329 e= &st->index_entries[index];
1330 assert(e->timestamp >= target_ts);
1331 pos_max= e->pos;
1332 ts_max= e->timestamp;
1333 pos_limit= pos_max - e->min_distance;
1334 #ifdef DEBUG_SEEK
1335 av_log(s, AV_LOG_DEBUG, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%"PRId64"\n",
1336 pos_max,pos_limit, ts_max);
1337 #endif
1338 }
1339 }
1340
1341 pos= av_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp);
1342 if(pos<0)
1343 return -1;
1344
1345 /* do the seek */
1346 url_fseek(s->pb, pos, SEEK_SET);
1347
1348 av_update_cur_dts(s, st, ts);
1349
1350 return 0;
1351 }
1352
1353 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 )){
1354 int64_t pos, ts;
1355 int64_t start_pos, filesize;
1356 int no_change;
1357
1358 #ifdef DEBUG_SEEK
1359 av_log(s, AV_LOG_DEBUG, "gen_seek: %d %"PRId64"\n", stream_index, target_ts);
1360 #endif
1361
1362 if(ts_min == AV_NOPTS_VALUE){
1363 pos_min = s->data_offset;
1364 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1365 if (ts_min == AV_NOPTS_VALUE)
1366 return -1;
1367 }
1368
1369 if(ts_max == AV_NOPTS_VALUE){
1370 int step= 1024;
1371 filesize = url_fsize(s->pb);
1372 pos_max = filesize - 1;
1373 do{
1374 pos_max -= step;
1375 ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step);
1376 step += step;
1377 }while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
1378 if (ts_max == AV_NOPTS_VALUE)
1379 return -1;
1380
1381 for(;;){
1382 int64_t tmp_pos= pos_max + 1;
1383 int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX);
1384 if(tmp_ts == AV_NOPTS_VALUE)
1385 break;
1386 ts_max= tmp_ts;
1387 pos_max= tmp_pos;
1388 if(tmp_pos >= filesize)
1389 break;
1390 }
1391 pos_limit= pos_max;
1392 }
1393
1394 if(ts_min > ts_max){
1395 return -1;
1396 }else if(ts_min == ts_max){
1397 pos_limit= pos_min;
1398 }
1399
1400 no_change=0;
1401 while (pos_min < pos_limit) {
1402 #ifdef DEBUG_SEEK
1403 av_log(s, AV_LOG_DEBUG, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%"PRId64" dts_max=%"PRId64"\n",
1404 pos_min, pos_max,
1405 ts_min, ts_max);
1406 #endif
1407 assert(pos_limit <= pos_max);
1408
1409 if(no_change==0){
1410 int64_t approximate_keyframe_distance= pos_max - pos_limit;
1411 // interpolate position (better than dichotomy)
1412 pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min)
1413 + pos_min - approximate_keyframe_distance;
1414 }else if(no_change==1){
1415 // bisection, if interpolation failed to change min or max pos last time
1416 pos = (pos_min + pos_limit)>>1;
1417 }else{
1418 /* linear search if bisection failed, can only happen if there
1419 are very few or no keyframes between min/max */
1420 pos=pos_min;
1421 }
1422 if(pos <= pos_min)
1423 pos= pos_min + 1;
1424 else if(pos > pos_limit)
1425 pos= pos_limit;
1426 start_pos= pos;
1427
1428 ts = read_timestamp(s, stream_index, &pos, INT64_MAX); //may pass pos_limit instead of -1
1429 if(pos == pos_max)
1430 no_change++;
1431 else
1432 no_change=0;
1433 #ifdef DEBUG_SEEK
1434 av_log(s, AV_LOG_DEBUG, "%"PRId64" %"PRId64" %"PRId64" / %"PRId64" %"PRId64" %"PRId64" target:%"PRId64" limit:%"PRId64" start:%"PRId64" noc:%d\n", pos_min, pos, pos_max, ts_min, ts, ts_max, target_ts, pos_limit, start_pos, no_change);
1435 #endif
1436 if(ts == AV_NOPTS_VALUE){
1437 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
1438 return -1;
1439 }
1440 assert(ts != AV_NOPTS_VALUE);
1441 if (target_ts <= ts) {
1442 pos_limit = start_pos - 1;
1443 pos_max = pos;
1444 ts_max = ts;
1445 }
1446 if (target_ts >= ts) {
1447 pos_min = pos;
1448 ts_min = ts;
1449 }
1450 }
1451
1452 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1453 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
1454 #ifdef DEBUG_SEEK
1455 pos_min = pos;
1456 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1457 pos_min++;
1458 ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1459 av_log(s, AV_LOG_DEBUG, "pos=0x%"PRIx64" %"PRId64"<=%"PRId64"<=%"PRId64"\n",
1460 pos, ts_min, target_ts, ts_max);
1461 #endif
1462 *ts_ret= ts;
1463 return pos;
1464 }
1465
1466 static int av_seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
1467 int64_t pos_min, pos_max;
1468 #if 0
1469 AVStream *st;
1470
1471 if (stream_index < 0)
1472 return -1;
1473
1474 st= s->streams[stream_index];
1475 #endif
1476
1477 pos_min = s->data_offset;
1478 pos_max = url_fsize(s->pb) - 1;
1479
1480 if (pos < pos_min) pos= pos_min;
1481 else if(pos > pos_max) pos= pos_max;
1482
1483 url_fseek(s->pb, pos, SEEK_SET);
1484
1485 #if 0
1486 av_update_cur_dts(s, st, ts);
1487 #endif
1488 return 0;
1489 }
1490
1491 static int av_seek_frame_generic(AVFormatContext *s,
1492 int stream_index, int64_t timestamp, int flags)
1493 {
1494 int index, ret;
1495 AVStream *st;
1496 AVIndexEntry *ie;
1497
1498 st = s->streams[stream_index];
1499
1500 index = av_index_search_timestamp(st, timestamp, flags);
1501
1502 if(index < 0 || index==st->nb_index_entries-1){
1503 int i;
1504 AVPacket pkt;
1505
1506 if(st->nb_index_entries){
1507 assert(st->index_entries);
1508 ie= &st->index_entries[st->nb_index_entries-1];
1509 if ((ret = url_fseek(s->pb, ie->pos, SEEK_SET)) < 0)
1510 return ret;
1511 av_update_cur_dts(s, st, ie->timestamp);
1512 }else{
1513 if ((ret = url_fseek(s->pb, 0, SEEK_SET)) < 0)
1514 return ret;
1515 }
1516 for(i=0;; i++) {
1517 int ret;
1518 do{
1519 ret = av_read_frame(s, &pkt);
1520 }while(ret == AVERROR(EAGAIN));
1521 if(ret<0)
1522 break;
1523 av_free_packet(&pkt);
1524 if(stream_index == pkt.stream_index){
1525 if((pkt.flags & PKT_FLAG_KEY) && pkt.dts > timestamp)
1526 break;
1527 }
1528 }
1529 index = av_index_search_timestamp(st, timestamp, flags);
1530 }
1531 if (index < 0)
1532 return -1;
1533
1534 av_read_frame_flush(s);
1535 if (s->iformat->read_seek){
1536 if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
1537 return 0;
1538 }
1539 ie = &st->index_entries[index];
1540 if ((ret = url_fseek(s->pb, ie->pos, SEEK_SET)) < 0)
1541 return ret;
1542 av_update_cur_dts(s, st, ie->timestamp);
1543
1544 return 0;
1545 }
1546
1547 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
1548 {
1549 int ret;
1550 AVStream *st;
1551
1552 av_read_frame_flush(s);
1553
1554 if(flags & AVSEEK_FLAG_BYTE)
1555 return av_seek_frame_byte(s, stream_index, timestamp, flags);
1556
1557 if(stream_index < 0){
1558 stream_index= av_find_default_stream_index(s);
1559 if(stream_index < 0)
1560 return -1;
1561
1562 st= s->streams[stream_index];
1563 /* timestamp for default must be expressed in AV_TIME_BASE units */
1564 timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
1565 }
1566
1567 /* first, we try the format specific seek */
1568 if (s->iformat->read_seek)
1569 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
1570 else
1571 ret = -1;
1572 if (ret >= 0) {
1573 return 0;
1574 }
1575
1576 if(s->iformat->read_timestamp)
1577 return av_seek_frame_binary(s, stream_index, timestamp, flags);
1578 else
1579 return av_seek_frame_generic(s, stream_index, timestamp, flags);
1580 }
1581
1582 /*******************************************************/
1583
1584 /**
1585 * Returns TRUE if the stream has accurate duration in any stream.
1586 *
1587 * @return TRUE if the stream has accurate duration for at least one component.
1588 */
1589 static int av_has_duration(AVFormatContext *ic)
1590 {
1591 int i;
1592 AVStream *st;
1593
1594 for(i = 0;i < ic->nb_streams; i++) {
1595 st = ic->streams[i];
1596 if (st->duration != AV_NOPTS_VALUE)
1597 return 1;
1598 }
1599 return 0;
1600 }
1601
1602 /**
1603 * Estimate the stream timings from the one of each components.
1604 *
1605 * Also computes the global bitrate if possible.
1606 */
1607 static void av_update_stream_timings(AVFormatContext *ic)
1608 {
1609 int64_t start_time, start_time1, end_time, end_time1;
1610 int64_t duration, duration1;
1611 int i;
1612 AVStream *st;
1613
1614 start_time = INT64_MAX;
1615 end_time = INT64_MIN;
1616 duration = INT64_MIN;
1617 for(i = 0;i < ic->nb_streams; i++) {
1618 st = ic->streams[i];
1619 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
1620 start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
1621 if (start_time1 < start_time)
1622 start_time = start_time1;
1623 if (st->duration != AV_NOPTS_VALUE) {
1624 end_time1 = start_time1
1625 + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1626 if (end_time1 > end_time)
1627 end_time = end_time1;
1628 }
1629 }
1630 if (st->duration != AV_NOPTS_VALUE) {
1631 duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1632 if (duration1 > duration)
1633 duration = duration1;
1634 }
1635 }
1636 if (start_time != INT64_MAX) {
1637 ic->start_time = start_time;
1638 if (end_time != INT64_MIN) {
1639 if (end_time - start_time > duration)
1640 duration = end_time - start_time;
1641 }
1642 }
1643 if (duration != INT64_MIN) {
1644 ic->duration = duration;
1645 if (ic->file_size > 0) {
1646 /* compute the bitrate */
1647 ic->bit_rate = (double)ic->file_size * 8.0 * AV_TIME_BASE /
1648 (double)ic->duration;
1649 }
1650 }
1651 }
1652
1653 static void fill_all_stream_timings(AVFormatContext *ic)
1654 {
1655 int i;
1656 AVStream *st;
1657
1658 av_update_stream_timings(ic);
1659 for(i = 0;i < ic->nb_streams; i++) {
1660 st = ic->streams[i];
1661 if (st->start_time == AV_NOPTS_VALUE) {
1662 if(ic->start_time != AV_NOPTS_VALUE)
1663 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
1664 if(ic->duration != AV_NOPTS_VALUE)
1665 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
1666 }
1667 }
1668 }
1669
1670 static void av_estimate_timings_from_bit_rate(AVFormatContext *ic)
1671 {
1672 int64_t filesize, duration;
1673 int bit_rate, i;
1674 AVStream *st;
1675
1676 /* if bit_rate is already set, we believe it */
1677 if (ic->bit_rate == 0) {
1678 bit_rate = 0;
1679 for(i=0;i<ic->nb_streams;i++) {
1680 st = ic->streams[i];
1681 bit_rate += st->codec->bit_rate;
1682 }
1683 ic->bit_rate = bit_rate;
1684 }
1685
1686 /* if duration is already set, we believe it */
1687 if (ic->duration == AV_NOPTS_VALUE &&
1688 ic->bit_rate != 0 &&
1689 ic->file_size != 0) {
1690 filesize = ic->file_size;
1691 if (filesize > 0) {
1692 for(i = 0; i < ic->nb_streams; i++) {
1693 st = ic->streams[i];
1694 duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
1695 if (st->duration == AV_NOPTS_VALUE)
1696 st->duration = duration;
1697 }
1698 }
1699 }
1700 }
1701
1702 #define DURATION_MAX_READ_SIZE 250000
1703
1704 /* only usable for MPEG-PS streams */
1705 static void av_estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
1706 {
1707 AVPacket pkt1, *pkt = &pkt1;
1708 AVStream *st;
1709 int read_size, i, ret;
1710 int64_t end_time;
1711 int64_t filesize, offset, duration;
1712
1713 ic->cur_st = NULL;
1714
1715 /* flush packet queue */
1716 flush_packet_queue(ic);
1717
1718 for(i=0;i<ic->nb_streams;i++) {
1719 st = ic->streams[i];
1720 if (st->parser) {
1721 av_parser_close(st->parser);
1722 st->parser= NULL;
1723 av_free_packet(&st->cur_pkt);
1724 }
1725 }
1726
1727 /* we read the first packets to get the first PTS (not fully
1728 accurate, but it is enough now) */
1729 url_fseek(ic->pb, 0, SEEK_SET);
1730 read_size = 0;
1731 for(;;) {
1732 if (read_size >= DURATION_MAX_READ_SIZE)
1733 break;
1734 /* if all info is available, we can stop */
1735 for(i = 0;i < ic->nb_streams; i++) {
1736 st = ic->streams[i];
1737 if (st->start_time == AV_NOPTS_VALUE)
1738 break;
1739 }
1740 if (i == ic->nb_streams)
1741 break;
1742
1743 do{
1744 ret = av_read_packet(ic, pkt);
1745 }while(ret == AVERROR(EAGAIN));
1746 if (ret != 0)
1747 break;
1748 read_size += pkt->size;
1749 st = ic->streams[pkt->stream_index];
1750 if (pkt->pts != AV_NOPTS_VALUE) {
1751 if (st->start_time == AV_NOPTS_VALUE)
1752 st->start_time = pkt->pts;
1753 }
1754 av_free_packet(pkt);
1755 }
1756
1757 /* estimate the end time (duration) */
1758 /* XXX: may need to support wrapping */
1759 filesize = ic->file_size;
1760 offset = filesize - DURATION_MAX_READ_SIZE;
1761 if (offset < 0)
1762 offset = 0;
1763
1764 url_fseek(ic->pb, offset, SEEK_SET);
1765 read_size = 0;
1766 for(;;) {
1767 if (read_size >= DURATION_MAX_READ_SIZE)
1768 break;
1769
1770 do{
1771 ret = av_read_packet(ic, pkt);
1772 }while(ret == AVERROR(EAGAIN));
1773 if (ret != 0)
1774 break;
1775 read_size += pkt->size;
1776 st = ic->streams[pkt->stream_index];
1777 if (pkt->pts != AV_NOPTS_VALUE &&
1778 st->start_time != AV_NOPTS_VALUE) {
1779 end_time = pkt->pts;
1780 duration = end_time - st->start_time;
1781 if (duration > 0) {
1782 if (st->duration == AV_NOPTS_VALUE ||
1783 st->duration < duration)
1784 st->duration = duration;
1785 }
1786 }
1787 av_free_packet(pkt);
1788 }
1789
1790 fill_all_stream_timings(ic);
1791
1792 url_fseek(ic->pb, old_offset, SEEK_SET);
1793 for(i=0; i<ic->nb_streams; i++){
1794 st= ic->streams[i];
1795 st->cur_dts= st->first_dts;
1796 st->last_IP_pts = AV_NOPTS_VALUE;
1797 }
1798 }
1799
1800 static void av_estimate_timings(AVFormatContext *ic, int64_t old_offset)
1801 {
1802 int64_t file_size;
1803
1804 /* get the file size, if possible */
1805 if (ic->iformat->flags & AVFMT_NOFILE) {
1806 file_size = 0;
1807 } else {
1808 file_size = url_fsize(ic->pb);
1809 if (file_size < 0)
1810 file_size = 0;
1811 }
1812 ic->file_size = file_size;
1813
1814 if ((!strcmp(ic->iformat->name, "mpeg") ||
1815 !strcmp(ic->iformat->name, "mpegts")) &&
1816 file_size && !url_is_streamed(ic->pb)) {
1817 /* get accurate estimate from the PTSes */
1818 av_estimate_timings_from_pts(ic, old_offset);
1819 } else if (av_has_duration(ic)) {
1820 /* at least one component has timings - we use them for all
1821 the components */
1822 fill_all_stream_timings(ic);
1823 } else {
1824 /* less precise: use bitrate info */
1825 av_estimate_timings_from_bit_rate(ic);
1826 }
1827 av_update_stream_timings(ic);
1828
1829 #if 0
1830 {
1831 int i;
1832 AVStream *st;
1833 for(i = 0;i < ic->nb_streams; i++) {
1834 st = ic->streams[i];
1835 printf("%d: start_time: %0.3f duration: %0.3f\n",
1836 i, (double)st->start_time / AV_TIME_BASE,
1837 (double)st->duration / AV_TIME_BASE);
1838 }
1839 printf("stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
1840 (double)ic->start_time / AV_TIME_BASE,
1841 (double)ic->duration / AV_TIME_BASE,
1842 ic->bit_rate / 1000);
1843 }
1844 #endif
1845 }
1846
1847 static int has_codec_parameters(AVCodecContext *enc)
1848 {
1849 int val;
1850 switch(enc->codec_type) {
1851 case CODEC_TYPE_AUDIO:
1852 val = enc->sample_rate && enc->channels && enc->sample_fmt != SAMPLE_FMT_NONE;
1853 if(!enc->frame_size &&
1854 (enc->codec_id == CODEC_ID_VORBIS ||
1855 enc->codec_id == CODEC_ID_AAC))
1856 return 0;
1857 break;
1858 case CODEC_TYPE_VIDEO:
1859 val = enc->width && enc->pix_fmt != PIX_FMT_NONE;
1860 break;
1861 default:
1862 val = 1;
1863 break;
1864 }
1865 return enc->codec_id != CODEC_ID_NONE && val != 0;
1866 }
1867
1868 static int try_decode_frame(AVStream *st, const uint8_t *data, int size)
1869 {
1870 int16_t *samples;
1871 AVCodec *codec;
1872 int got_picture, data_size, ret=0;
1873 AVFrame picture;
1874
1875 if(!st->codec->codec){
1876 codec = avcodec_find_decoder(st->codec->codec_id);
1877 if (!codec)
1878 return -1;
1879 ret = avcodec_open(st->codec, codec);
1880 if (ret < 0)
1881 return ret;
1882 }
1883
1884 if(!has_codec_parameters(st->codec)){
1885 switch(st->codec->codec_type) {
1886 case CODEC_TYPE_VIDEO:
1887 ret = avcodec_decode_video(st->codec, &picture,
1888 &got_picture, data, size);
1889 break;
1890 case CODEC_TYPE_AUDIO:
1891 data_size = FFMAX(size, AVCODEC_MAX_AUDIO_FRAME_SIZE);
1892 samples = av_malloc(data_size);
1893 if (!samples)
1894 goto fail;
1895 ret = avcodec_decode_audio2(st->codec, samples,
1896 &data_size, data, size);
1897 av_free(samples);
1898 break;
1899 default:
1900 break;
1901 }
1902 }
1903 fail:
1904 return ret;
1905 }
1906
1907 unsigned int codec_get_tag(const AVCodecTag *tags, int id)
1908 {
1909 while (tags->id != CODEC_ID_NONE) {
1910 if (tags->id == id)
1911 return tags->tag;
1912 tags++;
1913 }
1914 return 0;
1915 }
1916
1917 enum CodecID codec_get_id(const AVCodecTag *tags, unsigned int tag)
1918 {
1919 int i;
1920 for(i=0; tags[i].id != CODEC_ID_NONE;i++) {
1921 if(tag == tags[i].tag)
1922 return tags[i].id;
1923 }
1924 for(i=0; tags[i].id != CODEC_ID_NONE; i++) {
1925 if( toupper((tag >> 0)&0xFF) == toupper((tags[i].tag >> 0)&0xFF)
1926 && toupper((tag >> 8)&0xFF) == toupper((tags[i].tag >> 8)&0xFF)
1927 && toupper((tag >>16)&0xFF) == toupper((tags[i].tag >>16)&0xFF)
1928 && toupper((tag >>24)&0xFF) == toupper((tags[i].tag >>24)&0xFF))
1929 return tags[i].id;
1930 }
1931 return CODEC_ID_NONE;
1932 }
1933
1934 unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum CodecID id)
1935 {
1936 int i;
1937 for(i=0; tags && tags[i]; i++){
1938 int tag= codec_get_tag(tags[i], id);
1939 if(tag) return tag;
1940 }
1941 return 0;
1942 }
1943
1944 enum CodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag)
1945 {
1946 int i;
1947 for(i=0; tags && tags[i]; i++){
1948 enum CodecID id= codec_get_id(tags[i], tag);
1949 if(id!=CODEC_ID_NONE) return id;
1950 }
1951 return CODEC_ID_NONE;
1952 }
1953
1954 static void compute_chapters_end(AVFormatContext *s)
1955 {
1956 unsigned int i;
1957
1958 for (i=0; i+1<s->nb_chapters; i++)
1959 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
1960 assert(s->chapters[i]->start <= s->chapters[i+1]->start);
1961 assert(!av_cmp_q(s->chapters[i]->time_base, s->chapters[i+1]->time_base));
1962 s->chapters[i]->end = s->chapters[i+1]->start;
1963 }
1964
1965 if (s->nb_chapters && s->chapters[i]->end == AV_NOPTS_VALUE) {
1966 assert(s->start_time != AV_NOPTS_VALUE);
1967 assert(s->duration > 0);
1968 s->chapters[i]->end = av_rescale_q(s->start_time + s->duration,
1969 AV_TIME_BASE_Q,
1970 s->chapters[i]->time_base);
1971 }
1972 }
1973
1974 /* absolute maximum size we read until we abort */
1975 #define MAX_READ_SIZE 5000000
1976
1977 #define MAX_STD_TIMEBASES (60*12+5)
1978 static int get_std_framerate(int i){
1979 if(i<60*12) return i*1001;
1980 else return ((const int[]){24,30,60,12,15})[i-60*12]*1000*12;
1981 }
1982
1983 /*
1984 * Is the time base unreliable.
1985 * This is a heuristic to balance between quick acceptance of the values in
1986 * the headers vs. some extra checks.
1987 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
1988 * MPEG-2 commonly misuses field repeat flags to store different framerates.
1989 * And there are "variable" fps files this needs to detect as well.
1990 */
1991 static int tb_unreliable(AVCodecContext *c){
1992 if( c->time_base.den >= 101L*c->time_base.num
1993 || c->time_base.den < 5L*c->time_base.num
1994 /* || c->codec_tag == AV_RL32("DIVX")
1995 || c->codec_tag == AV_RL32("XVID")*/
1996 || c->codec_id == CODEC_ID_MPEG2VIDEO
1997 || c->codec_id == CODEC_ID_H264
1998 )
1999 return 1;
2000 return 0;
2001 }
2002
2003 int av_find_stream_info(AVFormatContext *ic)
2004 {
2005 int i, count, ret, read_size, j;
2006 AVStream *st;
2007 AVPacket pkt1, *pkt;
2008 int64_t last_dts[MAX_STREAMS];
2009 int duration_count[MAX_STREAMS]={0};
2010 double (*duration_error)[MAX_STD_TIMEBASES];
2011 int64_t old_offset = url_ftell(ic->pb);
2012 int64_t codec_info_duration[MAX_STREAMS]={0};
2013 int codec_info_nb_frames[MAX_STREAMS]={0};
2014
2015 duration_error = av_mallocz(MAX_STREAMS * sizeof(*duration_error));
2016 if (!duration_error) return AVERROR(ENOMEM);
2017
2018 for(i=0;i<ic->nb_streams;i++) {
2019 st = ic->streams[i];
2020 if(st->codec->codec_type == CODEC_TYPE_VIDEO){
2021 /* if(!st->time_base.num)
2022 st->time_base= */
2023 if(!st->codec->time_base.num)
2024 st->codec->time_base= st->time_base;
2025 }
2026 //only for the split stuff
2027 if (!st->parser) {
2028 st->parser = av_parser_init(st->codec->codec_id);
2029 if(st->need_parsing == AVSTREAM_PARSE_HEADERS && st->parser){
2030 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
2031 }
2032 }
2033 }
2034
2035 for(i=0;i<MAX_STREAMS;i++){
2036 last_dts[i]= AV_NOPTS_VALUE;
2037 }
2038
2039 count = 0;
2040 read_size = 0;
2041 for(;;) {
2042 if(url_interrupt_cb()){
2043 ret= AVERROR(EINTR);
2044 break;
2045 }
2046
2047 /* check if one codec still needs to be handled */
2048 for(i=0;i<ic->nb_streams;i++) {
2049 st = ic->streams[i];
2050 if (!has_codec_parameters(st->codec))
2051 break;
2052 /* variable fps and no guess at the real fps */
2053 if( tb_unreliable(st->codec)
2054 && duration_count[i]<20 && st->codec->codec_type == CODEC_TYPE_VIDEO)
2055 break;
2056 if(st->parser && st->parser->parser->split && !st->codec->extradata)
2057 break;
2058 if(st->first_dts == AV_NOPTS_VALUE)
2059 break;
2060 }
2061 if (i == ic->nb_streams) {
2062 /* NOTE: if the format has no header, then we need to read
2063 some packets to get most of the streams, so we cannot
2064 stop here */
2065 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
2066 /* if we found the info for all the codecs, we can stop */
2067 ret = count;
2068 break;
2069 }
2070 }
2071 /* we did not get all the codec info, but we read too much data */
2072 if (read_size >= MAX_READ_SIZE) {
2073 ret = count;
2074 break;
2075 }
2076
2077 /* NOTE: a new stream can be added there if no header in file
2078 (AVFMTCTX_NOHEADER) */
2079 ret = av_read_frame_internal(ic, &pkt1);
2080 if(ret == AVERROR(EAGAIN))
2081 continue;
2082 if (ret < 0) {
2083 /* EOF or error */
2084 ret = -1; /* we could not have all the codec parameters before EOF */
2085 for(i=0;i<ic->nb_streams;i++) {
2086 st = ic->streams[i];
2087 if (!has_codec_parameters(st->codec)){
2088 char buf[256];
2089 avcodec_string(buf, sizeof(buf), st->codec, 0);
2090 av_log(ic, AV_LOG_INFO, "Could not find codec parameters (%s)\n", buf);
2091 } else {
2092 ret = 0;
2093 }
2094 }
2095 break;
2096 }
2097
2098 pkt= add_to_pktbuf(&ic->packet_buffer, &pkt1, &ic->packet_buffer_end);
2099 if(av_dup_packet(pkt) < 0) {
2100 av_free(duration_error);
2101 return AVERROR(ENOMEM);
2102 }
2103
2104 read_size += pkt->size;
2105
2106 st = ic->streams[pkt->stream_index];
2107 if(codec_info_nb_frames[st->index]>1)
2108 codec_info_duration[st->index] += pkt->duration;
2109 if (pkt->duration != 0)
2110 codec_info_nb_frames[st->index]++;
2111
2112 {
2113 int index= pkt->stream_index;
2114 int64_t last= last_dts[index];
2115 int64_t duration= pkt->dts - last;
2116
2117 if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && duration>0){
2118 double dur= duration * av_q2d(st->time_base);
2119
2120 // if(st->codec->codec_type == CODEC_TYPE_VIDEO)
2121 // av_log(NULL, AV_LOG_ERROR, "%f\n", dur);
2122 if(duration_count[index] < 2)
2123 memset(duration_error[index], 0, sizeof(*duration_error));
2124 for(i=1; i<MAX_STD_TIMEBASES; i++){
2125 int framerate= get_std_framerate(i);
2126 int ticks= lrintf(dur*framerate/(1001*12));
2127 double error= dur - ticks*1001*12/(double)framerate;
2128 duration_error[index][i] += error*error;
2129 }
2130 duration_count[index]++;
2131 }
2132 if(last == AV_NOPTS_VALUE || duration_count[index]<=1)
2133 last_dts[pkt->stream_index]= pkt->dts;
2134 }
2135 if(st->parser && st->parser->parser->split && !st->codec->extradata){
2136 int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
2137 if(i){
2138 st->codec->extradata_size= i;
2139 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
2140 memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
2141 memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2142 }
2143 }
2144
2145 /* if still no information, we try to open the codec and to
2146 decompress the frame. We try to avoid that in most cases as
2147 it takes longer and uses more memory. For MPEG-4, we need to
2148 decompress for QuickTime. */
2149 if (!has_codec_parameters(st->codec) /*&&
2150 (st->codec->codec_id == CODEC_ID_FLV1 ||
2151 st->codec->codec_id == CODEC_ID_H264 ||
2152 st->codec->codec_id == CODEC_ID_H263 ||
2153 st->codec->codec_id == CODEC_ID_H261 ||
2154 st->codec->codec_id == CODEC_ID_VORBIS ||
2155 st->codec->codec_id == CODEC_ID_MJPEG ||
2156 st->codec->codec_id == CODEC_ID_PNG ||
2157 st->codec->codec_id == CODEC_ID_PAM ||
2158 st->codec->codec_id == CODEC_ID_PGM ||
2159 st->codec->codec_id == CODEC_ID_PGMYUV ||
2160 st->codec->codec_id == CODEC_ID_PBM ||
2161 st->codec->codec_id == CODEC_ID_PPM ||
2162 st->codec->codec_id == CODEC_ID_SHORTEN ||
2163 (st->codec->codec_id == CODEC_ID_MPEG4 && !st->need_parsing))*/)
2164 try_decode_frame(st, pkt->data, pkt->size);
2165
2166 if (st->time_base.den > 0 && av_rescale_q(codec_info_duration[st->index], st->time_base, AV_TIME_BASE_Q) >= ic->max_analyze_duration) {
2167 break;
2168 }
2169 count++;
2170 }
2171
2172 // close codecs which were opened in try_decode_frame()
2173 for(i=0;i<ic->nb_streams;i++) {
2174 st = ic->streams[i];
2175 if(st->codec->codec)
2176 avcodec_close(st->codec);
2177 }
2178 for(i=0;i<ic->nb_streams;i++) {
2179 st = ic->streams[i];
2180 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
2181 if(st->codec->codec_id == CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample)
2182 st->codec->codec_tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
2183
2184 if(duration_count[i]
2185 && tb_unreliable(st->codec) /*&&
2186 //FIXME we should not special-case MPEG-2, but this needs testing with non-MPEG-2 ...
2187 st->time_base.num*duration_sum[i]/duration_count[i]*101LL > st->time_base.den*/){
2188 double best_error= 2*av_q2d(st->time_base);
2189 best_error= best_error*best_error*duration_count[i]*1000*12*30;
2190
2191 for(j=1; j<MAX_STD_TIMEBASES; j++){
2192 double error= duration_error[i][j] * get_std_framerate(j);
2193 // if(st->codec->codec_type == CODEC_TYPE_VIDEO)
2194 // av_log(NULL, AV_LOG_ERROR, "%f %f\n", get_std_framerate(j) / 12.0/1001, error);
2195 if(error < best_error){
2196 best_error= error;
2197 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, get_std_framerate(j), 12*1001, INT_MAX);
2198 }
2199 }
2200 }
2201
2202 if (!st->r_frame_rate.num){
2203 if( st->codec->time_base.den * (int64_t)st->time_base.num
2204 <= st->codec->time_base.num * (int64_t)st->time_base.den){
2205 st->r_frame_rate.num = st->codec->time_base.den;
2206 st->r_frame_rate.den = st->codec->time_base.num;
2207 }else{
2208 st->r_frame_rate.num = st->time_base.den;
2209 st->r_frame_rate.den = st->time_base.num;
2210 }
2211 }
2212 }else if(st->codec->codec_type == CODEC_TYPE_AUDIO) {
2213 if(!st->codec->bits_per_coded_sample)
2214 st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id);
2215 }
2216 }
2217
2218 av_estimate_timings(ic, old_offset);
2219
2220 compute_chapters_end(ic);
2221
2222 #if 0
2223 /* correct DTS for B-frame streams with no timestamps */
2224 for(i=0;i<ic->nb_streams;i++) {
2225 st = ic->streams[i];
2226 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
2227 if(b-frames){
2228 ppktl = &ic->packet_buffer;
2229 while(ppkt1){
2230 if(ppkt1->stream_index != i)
2231 continue;
2232 if(ppkt1->pkt->dts < 0)
2233 break;
2234 if(ppkt1->pkt->pts != AV_NOPTS_VALUE)
2235 break;
2236 ppkt1->pkt->dts -= delta;
2237 ppkt1= ppkt1->next;
2238 }
2239 if(ppkt1)
2240 continue;
2241 st->cur_dts -= delta;
2242 }
2243 }
2244 }
2245 #endif
2246
2247 av_free(duration_error);
2248
2249 return ret;
2250 }
2251
2252 /*******************************************************/
2253
2254 int av_read_play(AVFormatContext *s)
2255 {
2256 if (s->iformat->read_play)
2257 return s->iformat->read_play(s);
2258 if (s->pb)
2259 return av_url_read_fpause(s->pb, 0);
2260 return AVERROR(ENOSYS);
2261 }
2262
2263 int av_read_pause(AVFormatContext *s)
2264 {
2265 if (s->iformat->read_pause)
2266 return s->iformat->read_pause(s);
2267 if (s->pb)
2268 return av_url_read_fpause(s->pb, 1);
2269 return AVERROR(ENOSYS);
2270 }
2271
2272 void av_close_input_stream(AVFormatContext *s)
2273 {
2274 int i;
2275 AVStream *st;
2276
2277 if (s->iformat->read_close)
2278 s->iformat->read_close(s);
2279 for(i=0;i<s->nb_streams;i++) {
2280 /* free all data in a stream component */
2281 st = s->streams[i];
2282 if (st->parser) {
2283 av_parser_close(st->parser);
2284 av_free_packet(&st->cur_pkt);
2285 }
2286 av_metadata_free(&st->metadata);
2287 av_free(st->index_entries);
2288 av_free(st->codec->extradata);
2289 av_free(st->codec);
2290 av_free(st->filename);
2291 av_free(st->priv_data);
2292 av_free(st);
2293 }
2294 for(i=s->nb_programs-1; i>=0; i--) {
2295 av_freep(&s->programs[i]->provider_name);
2296 av_freep(&s->programs[i]->name);
2297 av_metadata_free(&s->programs[i]->metadata);
2298 av_freep(&s->programs[i]->stream_index);
2299 av_freep(&s->programs[i]);
2300 }
2301 av_freep(&s->programs);
2302 flush_packet_queue(s);
2303 av_freep(&s->priv_data);
2304 while(s->nb_chapters--) {
2305 av_free(s->chapters[s->nb_chapters]->title);
2306 av_metadata_free(&s->chapters[s->nb_chapters]->metadata);
2307 av_free(s->chapters[s->nb_chapters]);
2308 }
2309 av_freep(&s->chapters);
2310 av_metadata_free(&s->metadata);
2311 av_free(s);
2312 }
2313
2314 void av_close_input_file(AVFormatContext *s)
2315 {
2316 ByteIOContext *pb = s->iformat->flags & AVFMT_NOFILE ? NULL : s->pb;
2317 av_close_input_stream(s);
2318 if (pb)
2319 url_fclose(pb);
2320 }
2321
2322 AVStream *av_new_stream(AVFormatContext *s, int id)
2323 {
2324 AVStream *st;
2325 int i;
2326
2327 if (s->nb_streams >= MAX_STREAMS)
2328 return NULL;
2329
2330 st = av_mallocz(sizeof(AVStream));
2331 if (!st)
2332 return NULL;
2333
2334 st->codec= avcodec_alloc_context();
2335 if (s->iformat) {
2336 /* no default bitrate if decoding */
2337 st->codec->bit_rate = 0;
2338 }
2339 st->index = s->nb_streams;
2340 st->id = id;
2341 st->start_time = AV_NOPTS_VALUE;
2342 st->duration = AV_NOPTS_VALUE;
2343 /* we set the current DTS to 0 so that formats without any timestamps
2344 but durations get some timestamps, formats with some unknown
2345 timestamps have their first few packets buffered and the
2346 timestamps corrected before they are returned to the user */
2347 st->cur_dts = 0;
2348 st->first_dts = AV_NOPTS_VALUE;
2349
2350 /* default pts setting is MPEG-like */
2351 av_set_pts_info(st, 33, 1, 90000);
2352 st->last_IP_pts = AV_NOPTS_VALUE;
2353 for(i=0; i<MAX_REORDER_DELAY+1; i++)
2354 st->pts_buffer[i]= AV_NOPTS_VALUE;
2355 st->reference_dts = AV_NOPTS_VALUE;
2356
2357 st->sample_aspect_ratio = (AVRational){0,1};
2358
2359 s->streams[s->nb_streams++] = st;
2360 return st;
2361 }
2362
2363 AVProgram *av_new_program(AVFormatContext *ac, int id)
2364 {
2365 AVProgram *program=NULL;
2366 int i;
2367
2368 #ifdef DEBUG_SI
2369 av_log(ac, AV_LOG_DEBUG, "new_program: id=0x%04x\n", id);
2370 #endif
2371
2372 for(i=0; i<ac->nb_programs; i++)
2373 if(ac->programs[i]->id == id)
2374 program = ac->programs[i];
2375
2376 if(!program){
2377 program = av_mallocz(sizeof(AVProgram));
2378 if (!program)
2379 return NULL;
2380 dynarray_add(&ac->programs, &ac->nb_programs, program);
2381 program->discard = AVDISCARD_NONE;
2382 }
2383 program->id = id;
2384
2385 return program;
2386 }
2387
2388 AVChapter *ff_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
2389 {
2390 AVChapter *chapter = NULL;
2391 int i;
2392
2393 for(i=0; i<s->nb_chapters; i++)
2394 if(s->chapters[i]->id == id)
2395 chapter = s->chapters[i];
2396
2397 if(!chapter){
2398 chapter= av_mallocz(sizeof(AVChapter));
2399 if(!chapter)
2400 return NULL;
2401 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
2402 }
2403 av_free(chapter->title);
2404 chapter->title = av_strdup(title);
2405 chapter->id = id;
2406 chapter->time_base= time_base;
2407 chapter->start = start;
2408 chapter->end = end;
2409
2410 return chapter;
2411 }
2412
2413 /************************************************************/
2414 /* output media file */
2415
2416 int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap)
2417 {
2418 int ret;
2419
2420 if (s->oformat->priv_data_size > 0) {
2421 s->priv_data = av_mallocz(s->oformat->priv_data_size);
2422 if (!s->priv_data)
2423 return AVERROR(ENOMEM);
2424 } else
2425 s->priv_data = NULL;
2426
2427 if (s->oformat->set_parameters) {
2428 ret = s->oformat->set_parameters(s, ap);
2429 if (ret < 0)
2430 return ret;
2431 }
2432 return 0;
2433 }
2434
2435 int av_write_header(AVFormatContext *s)
2436 {
2437 int ret, i;
2438 AVStream *st;
2439
2440 // some sanity checks
2441 for(i=0;i<s->nb_streams;i++) {
2442 st = s->streams[i];
2443
2444 switch (st->codec->codec_type) {
2445 case CODEC_TYPE_AUDIO:
2446 if(st->codec->sample_rate<=0){
2447 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
2448 return -1;
2449 }
2450 if(!st->codec->block_align)
2451 st->codec->block_align = st->codec->channels *
2452 av_get_bits_per_sample(st->codec->codec_id) >> 3;
2453 break;
2454 case CODEC_TYPE_VIDEO:
2455 if(st->codec->time_base.num<=0 || st->codec->time_base.den<=0){ //FIXME audio too?
2456 av_log(s, AV_LOG_ERROR, "time base not set\n");
2457 return -1;
2458 }
2459 if(st->codec->width<=0 || st->codec->height<=0){
2460 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
2461 return -1;
2462 }
2463 if(av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)){
2464 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between encoder and muxer layer\n");
2465 return -1;
2466 }
2467 break;
2468 }
2469
2470 if(s->oformat->codec_tag){
2471 if(st->codec->codec_tag){
2472 //FIXME
2473 //check that tag + id is in the table
2474 //if neither is in the table -> OK
2475 //if tag is in the table with another id -> FAIL
2476 //if id is in the table with another tag -> FAIL unless strict < ?
2477 }else
2478 st->codec->codec_tag= av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id);
2479 }
2480
2481 if(s->oformat->flags & AVFMT_GLOBALHEADER &&
2482 !(st->codec->flags & CODEC_FLAG_GLOBAL_HEADER))
2483 av_log(s, AV_LOG_WARNING, "Codec for stream %d does not use global headers but container format requires global headers\n", i);
2484 }
2485
2486 if (!s->priv_data && s->oformat->priv_data_size > 0) {
2487 s->priv_data = av_mallocz(s->oformat->priv_data_size);
2488 if (!s->priv_data)
2489 return AVERROR(ENOMEM);
2490 }
2491
2492 #if LIBAVFORMAT_VERSION_MAJOR < 53
2493 ff_metadata_mux_compat(s);
2494 #endif
2495
2496 if(s->oformat->write_header){
2497 ret = s->oformat->write_header(s);
2498 if (ret < 0)
2499 return ret;
2500 }
2501
2502 /* init PTS generation */
2503 for(i=0;i<s->nb_streams;i++) {
2504 int64_t den = AV_NOPTS_VALUE;
2505 st = s->streams[i];
2506
2507 switch (st->codec->codec_type) {
2508 case CODEC_TYPE_AUDIO:
2509 den = (int64_t)st->time_base.num * st->codec->sample_rate;
2510 break;
2511 case CODEC_TYPE_VIDEO:
2512 den = (int64_t)st->time_base.num * st->codec->time_base.den;
2513 break;
2514 default:
2515 break;
2516 }
2517 if (den != AV_NOPTS_VALUE) {
2518 if (den <= 0)
2519 return AVERROR_INVALIDDATA;
2520 av_frac_init(&st->pts, 0, 0, den);
2521 }
2522 }
2523 return 0;
2524 }
2525
2526 //FIXME merge with compute_pkt_fields
2527 static int compute_pkt_fields2(AVStream *st, AVPacket *pkt){
2528 int delay = FFMAX(st->codec->has_b_frames, !!st->codec->max_b_frames);
2529 int num, den, frame_size, i;
2530
2531 // av_log(st->codec, AV_LOG_DEBUG, "av_write_frame: pts:%"PRId64" dts:%"PRId64" cur_dts:%"PRId64" b:%d size:%d st:%d\n", pkt->pts, pkt->dts, st->cur_dts, delay, pkt->size, pkt->stream_index);
2532
2533 /* if(pkt->pts == AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE)
2534 return -1;*/
2535
2536 /* duration field */
2537 if (pkt->duration == 0) {
2538 compute_frame_duration(&num, &den, st, NULL, pkt);
2539 if (den && num) {
2540 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num);
2541 }
2542 }
2543
2544 if(pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay==0)
2545 pkt->pts= pkt->dts;
2546
2547 //XXX/FIXME this is a temporary hack until all encoders output pts
2548 if((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay){
2549 pkt->dts=
2550 // pkt->pts= st->cur_dts;
2551 pkt->pts= st->pts.val;
2552 }
2553
2554 //calculate dts from pts
2555 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
2556 st->pts_buffer[0]= pkt->pts;
2557 for(i=1; i<delay+1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
2558 st->pts_buffer[i]= (i-delay-1) * pkt->duration;
2559 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
2560 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
2561
2562 pkt->dts= st->pts_buffer[0];
2563 }
2564
2565 if(st->cur_dts && st->cur_dts != AV_NOPTS_VALUE && st->cur_dts >= pkt->dts){
2566 av_log(st->codec, AV_LOG_ERROR, "error, non monotone timestamps %"PRId64" >= %"PRId64"\n", st->cur_dts, pkt->dts);
2567 return -1;
2568 }
2569 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts){
2570 av_log(st->codec, AV_LOG_ERROR, "error, pts < dts\n");
2571 return -1;
2572 }
2573
2574 // av_log(NULL, AV_LOG_DEBUG, "av_write_frame: pts2:%"PRId64" dts2:%"PRId64"\n", pkt->pts, pkt->dts);
2575 st->cur_dts= pkt->dts;
2576 st->pts.val= pkt->dts;
2577
2578 /* update pts */
2579 switch (st->codec->codec_type) {
2580 case CODEC_TYPE_AUDIO:
2581 frame_size = get_audio_frame_size(st->codec, pkt->size);
2582
2583 /* HACK/FIXME, we skip the initial 0 size packets as they are most
2584 likely equal to the encoder delay, but it would be better if we
2585 had the real timestamps from the encoder */
2586 if (frame_size >= 0 && (pkt->size || st->pts.num!=st->pts.den>>1 || st->pts.val)) {
2587 av_frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
2588 }
2589 break;
2590 case CODEC_TYPE_VIDEO:
2591 av_frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num);
2592 break;
2593 default:
2594 break;
2595 }
2596 return 0;
2597 }
2598
2599 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
2600 {
2601 int ret = compute_pkt_fields2(s->streams[pkt->stream_index], pkt);
2602
2603 if(ret<0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
2604 return ret;
2605
2606 ret= s->oformat->write_packet(s, pkt);
2607 if(!ret)
2608 ret= url_ferror(s->pb);
2609 return ret;
2610 }
2611
2612 void ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
2613 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
2614 {
2615 AVPacketList **next_point, *this_pktl;
2616
2617 this_pktl = av_mallocz(sizeof(AVPacketList));
2618 this_pktl->pkt= *pkt;
2619 if(pkt->destruct == av_destruct_packet)
2620 pkt->destruct= NULL; // not shared -> must keep original from being freed
2621 else
2622 av_dup_packet(&this_pktl->pkt); //shared -> must dup
2623
2624 next_point = &s->packet_buffer;
2625 while(*next_point){
2626 if(compare(s, &(*next_point)->pkt, pkt))
2627 break;
2628 next_point= &(*next_point)->next;
2629 }
2630 this_pktl->next= *next_point;
2631 *next_point= this_pktl;
2632 }
2633
2634 int ff_interleave_compare_dts(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
2635 {
2636 AVStream *st = s->streams[ pkt ->stream_index];
2637 AVStream *st2= s->streams[ next->stream_index];
2638 int64_t left = st2->time_base.num * (int64_t)st ->time_base.den;
2639 int64_t right= st ->time_base.num * (int64_t)st2->time_base.den;
2640
2641 if (pkt->dts == AV_NOPTS_VALUE)
2642 return 0;
2643
2644 return next->dts * left > pkt->dts * right; //FIXME this can overflow
2645 }
2646
2647 int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush){
2648 AVPacketList *pktl;
2649 int stream_count=0;
2650 int streams[MAX_STREAMS];
2651
2652 if(pkt){
2653 ff_interleave_add_packet(s, pkt, ff_interleave_compare_dts);
2654 }
2655
2656 memset(streams, 0, sizeof(streams));
2657 pktl= s->packet_buffer;
2658 while(pktl){
2659 //av_log(s, AV_LOG_DEBUG, "show st:%d dts:%"PRId64"\n", pktl->pkt.stream_index, pktl->pkt.dts);
2660 if(streams[ pktl->pkt.stream_index ] == 0)
2661 stream_count++;
2662 streams[ pktl->pkt.stream_index ]++;
2663 pktl= pktl->next;
2664 }
2665
2666 if(stream_count && (s->nb_streams == stream_count || flush)){
2667 pktl= s->packet_buffer;
2668 *out= pktl->pkt;
2669
2670 s->packet_buffer= pktl->next;
2671 av_freep(&pktl);
2672 return 1;
2673 }else{
2674 av_init_packet(out);
2675 return 0;
2676 }
2677 }
2678
2679 /**
2680 * Interleaves an AVPacket correctly so it can be muxed.
2681 * @param out the interleaved packet will be output here
2682 * @param in the input packet
2683 * @param flush 1 if no further packets are available as input and all
2684 * remaining packets should be output
2685 * @return 1 if a packet was output, 0 if no packet could be output,
2686 * < 0 if an error occurred
2687 */
2688 static int av_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush){
2689 if(s->oformat->interleave_packet)
2690 return s->oformat->interleave_packet(s, out, in, flush);
2691 else
2692 return av_interleave_packet_per_dts(s, out, in, flush);
2693 }
2694
2695 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){
2696 AVStream *st= s->streams[ pkt->stream_index];
2697
2698 //FIXME/XXX/HACK drop zero sized packets
2699 if(st->codec->codec_type == CODEC_TYPE_AUDIO && pkt->size==0)
2700 return 0;
2701
2702 //av_log(NULL, AV_LOG_DEBUG, "av_interleaved_write_frame %d %"PRId64" %"PRId64"\n", pkt->size, pkt->dts, pkt->pts);
2703 if(compute_pkt_fields2(st, pkt) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
2704 return -1;
2705
2706 if(pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
2707 return -1;
2708
2709 for(;;){
2710 AVPacket opkt;
2711 int ret= av_interleave_packet(s, &opkt, pkt, 0);
2712 if(ret<=0) //FIXME cleanup needed for ret<0 ?
2713 return ret;
2714
2715 ret= s->oformat->write_packet(s, &opkt);
2716
2717 av_free_packet(&opkt);
2718 pkt= NULL;
2719
2720 if(ret<0)
2721 return ret;
2722 if(url_ferror(s->pb))
2723 return url_ferror(s->pb);
2724 }
2725 }
2726
2727 int av_write_trailer(AVFormatContext *s)
2728 {
2729 int ret, i;
2730
2731 for(;;){
2732 AVPacket pkt;
2733 ret= av_interleave_packet(s, &pkt, NULL, 1);
2734 if(ret<0) //FIXME cleanup needed for ret<0 ?
2735 goto fail;
2736 if(!ret)
2737 break;
2738
2739 ret= s->oformat->write_packet(s, &pkt);
2740
2741 av_free_packet(&pkt);
2742
2743 if(ret<0)
2744 goto fail;
2745 if(url_ferror(s->pb))
2746 goto fail;
2747 }
2748
2749 if(s->oformat->write_trailer)
2750 ret = s->oformat->write_trailer(s);
2751 fail:
2752 if(ret == 0)
2753 ret=url_ferror(s->pb);
2754 for(i=0;i<s->nb_streams;i++)
2755 av_freep(&s->streams[i]->priv_data);
2756 av_freep(&s->priv_data);
2757 return ret;
2758 }
2759
2760 void av_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
2761 {
2762 int i, j;
2763 AVProgram *program=NULL;
2764 void *tmp;
2765
2766 for(i=0; i<ac->nb_programs; i++){
2767 if(ac->programs[i]->id != progid)
2768 continue;
2769 program = ac->programs[i];
2770 for(j=0; j<program->nb_stream_indexes; j++)
2771 if(program->stream_index[j] == idx)
2772 return;
2773
2774 tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1));
2775 if(!tmp)
2776 return;
2777 program->stream_index = tmp;
2778 program->stream_index[program->nb_stream_indexes++] = idx;
2779 return;
2780 }
2781 }
2782
2783 static void print_fps(double d, const char *postfix){
2784 uint64_t v= lrintf(d*100);
2785 if (v% 100 ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix);
2786 else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix);
2787 else av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix);
2788 }
2789
2790 /* "user interface" functions */
2791 static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output)
2792 {
2793 char buf[256];
2794 int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
2795 AVStream *st = ic->streams[i];
2796 int g = av_gcd(st->time_base.num, st->time_base.den);
2797 avcodec_string(buf, sizeof(buf), st->codec, is_output);
2798 av_log(NULL, AV_LOG_INFO, " Stream #%d.%d", index, i);
2799 /* the pid is an important information, so we display it */
2800 /* XXX: add a generic system */
2801 if (flags & AVFMT_SHOW_IDS)
2802 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
2803 if (strlen(st->language) > 0)
2804 av_log(NULL, AV_LOG_INFO, "(%s)", st->language);
2805 av_log(NULL, AV_LOG_DEBUG, ", %d/%d", st->time_base.num/g, st->time_base.den/g);
2806 av_log(NULL, AV_LOG_INFO, ": %s", buf);
2807 if (st->sample_aspect_ratio.num && // default
2808 av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) {
2809 AVRational display_aspect_ratio;
2810 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
2811 st->codec->width*st->sample_aspect_ratio.num,
2812 st->codec->height*st->sample_aspect_ratio.den,
2813 1024*1024);
2814 av_log(NULL, AV_LOG_INFO, ", PAR %d:%d DAR %d:%d",
2815 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
2816 display_aspect_ratio.num, display_aspect_ratio.den);
2817 }
2818 if(st->codec->codec_type == CODEC_TYPE_VIDEO){
2819 if(st->r_frame_rate.den && st->r_frame_rate.num)
2820 print_fps(av_q2d(st->r_frame_rate), "tbr");
2821 if(st->time_base.den && st->time_base.num)
2822 print_fps(1/av_q2d(st->time_base), "tbn");
2823 if(st->codec->time_base.den && st->codec->time_base.num)
2824 print_fps(1/av_q2d(st->codec->time_base), "tbc");
2825 }
2826 av_log(NULL, AV_LOG_INFO, "\n");
2827 }
2828
2829 void dump_format(AVFormatContext *ic,
2830 int index,
2831 const char *url,
2832 int is_output)
2833 {
2834 int i;
2835
2836 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
2837 is_output ? "Output" : "Input",
2838 index,
2839 is_output ? ic->oformat->name : ic->iformat->name,
2840 is_output ? "to" : "from", url);
2841 if (!is_output) {
2842 av_log(NULL, AV_LOG_INFO, " Duration: ");
2843 if (ic->duration != AV_NOPTS_VALUE) {
2844 int hours, mins, secs, us;
2845 secs = ic->duration / AV_TIME_BASE;
2846 us = ic->duration % AV_TIME_BASE;
2847 mins = secs / 60;
2848 secs %= 60;
2849 hours = mins / 60;
2850 mins %= 60;
2851 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs,
2852 (100 * us) / AV_TIME_BASE);
2853 } else {
2854 av_log(NULL, AV_LOG_INFO, "N/A");
2855 }
2856 if (ic->start_time != AV_NOPTS_VALUE) {
2857 int secs, us;
2858 av_log(NULL, AV_LOG_INFO, ", start: ");
2859 secs = ic->start_time / AV_TIME_BASE;
2860 us = ic->start_time % AV_TIME_BASE;
2861 av_log(NULL, AV_LOG_INFO, "%d.%06d",
2862 secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
2863 }
2864 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
2865 if (ic->bit_rate) {
2866 av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
2867 } else {
2868 av_log(NULL, AV_LOG_INFO, "N/A");
2869 }
2870 av_log(NULL, AV_LOG_INFO, "\n");
2871 }
2872 if(ic->nb_programs) {
2873 int j, k;
2874 for(j=0; j<ic->nb_programs; j++) {
2875 av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id,
2876 ic->programs[j]->name ? ic->programs[j]->name : "");
2877 for(k=0; k<ic->programs[j]->nb_stream_indexes; k++)
2878 dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output);
2879 }
2880 } else
2881 for(i=0;i<ic->nb_streams;i++)
2882 dump_stream_format(ic, i, index, is_output);
2883 }
2884
2885 #if LIBAVFORMAT_VERSION_MAJOR < 53
2886 int parse_image_size(int *width_ptr, int *height_ptr, const char *str)
2887 {
2888 return av_parse_video_frame_size(width_ptr, height_ptr, str);
2889 }
2890
2891 int parse_frame_rate(int *frame_rate_num, int *frame_rate_den, const char *arg)
2892 {
2893 AVRational frame_rate;
2894 int ret = av_parse_video_frame_rate(&frame_rate, arg);
2895 *frame_rate_num= frame_rate.num;
2896 *frame_rate_den= frame_rate.den;
2897 return ret;
2898 }
2899 #endif
2900
2901 int64_t av_gettime(void)
2902 {
2903 struct timeval tv;
2904 gettimeofday(&tv,NULL);
2905 return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
2906 }
2907
2908 int64_t parse_date(const char *datestr, int duration)
2909 {
2910 const char *p;
2911 int64_t t;
2912 struct tm dt;
2913 int i;
2914 static const char * const date_fmt[] = {
2915 "%Y-%m-%d",
2916 "%Y%m%d",
2917 };
2918 static const char * const time_fmt[] = {
2919 "%H:%M:%S",
2920 "%H%M%S",
2921 };
2922 const char *q;
2923 int is_utc, len;
2924 char lastch;
2925 int negative = 0;
2926
2927 #undef time
2928 time_t now = time(0);
2929
2930 len = strlen(datestr);
2931 if (len > 0)
2932 lastch = datestr[len - 1];
2933 else
2934 lastch = '\0';
2935 is_utc = (lastch == 'z' || lastch == 'Z');
2936
2937 memset(&dt, 0, sizeof(dt));
2938
2939 p = datestr;
2940 q = NULL;
2941 if (!duration) {
2942 if (!strncasecmp(datestr, "now", len))
2943 return (int64_t) now * 1000000;
2944
2945 /* parse the year-month-day part */
2946 for (i = 0; i < FF_ARRAY_ELEMS(date_fmt); i++) {
2947 q = small_strptime(p, date_fmt[i], &dt);
2948 if (q) {
2949 break;
2950 }
2951 }
2952
2953 /* if the year-month-day part is missing, then take the
2954 * current year-month-day time */
2955 if (!q) {
2956 if (is_utc) {
2957 dt = *gmtime(&now);
2958 } else {
2959 dt = *localtime(&now);
2960 }
2961 dt.tm_hour = dt.tm_min = dt.tm_sec = 0;
2962 } else {
2963 p = q;
2964 }
2965
2966 if (*p == 'T' || *p == 't' || *p == ' ')
2967 p++;
2968
2969 /* parse the hour-minute-second part */
2970 for (i = 0; i < FF_ARRAY_ELEMS(time_fmt); i++) {
2971 q = small_strptime(p, time_fmt[i], &dt);
2972 if (q) {
2973 break;
2974 }
2975 }
2976 } else {
2977 /* parse datestr as a duration */
2978 if (p[0] == '-') {
2979 negative = 1;
2980 ++p;
2981 }
2982 /* parse datestr as HH:MM:SS */
2983 q = small_strptime(p, time_fmt[0], &dt);
2984 if (!q) {
2985 /* parse datestr as S+ */
2986 dt.tm_sec = strtol(p, (char **)&q, 10);
2987 if (q == p)
2988 /* the parsing didn't succeed */
2989 return INT64_MIN;
2990 dt.tm_min = 0;
2991 dt.tm_hour = 0;
2992 }
2993 }
2994
2995 /* Now we have all the fields that we can get */
2996 if (!q) {
2997 return INT64_MIN;
2998 }
2999
3000 if (duration) {
3001 t = dt.tm_hour * 3600 + dt.tm_min * 60 + dt.tm_sec;
3002 } else {
3003 dt.tm_isdst = -1; /* unknown */
3004 if (is_utc) {
3005 t = mktimegm(&dt);
3006 } else {
3007 t = mktime(&dt);
3008 }
3009 }
3010
3011 t *= 1000000;
3012
3013 /* parse the .m... part */
3014 if (*q == '.') {
3015 int val, n;
3016 q++;
3017 for (val = 0, n = 100000; n >= 1; n /= 10, q++) {
3018 if (!isdigit(*q))
3019 break;
3020 val += n * (*q - '0');
3021 }
3022 t += val;
3023 }
3024 return negative ? -t : t;
3025 }
3026
3027 int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info)
3028 {
3029 const char *p;
3030 char tag[128], *q;
3031
3032 p = info;
3033 if (*p == '?')
3034 p++;
3035 for(;;) {
3036 q = tag;
3037 while (*p != '\0' && *p != '=' && *p != '&') {
3038 if ((q - tag) < sizeof(tag) - 1)
3039 *q++ = *p;
3040 p++;
3041 }
3042 *q = '\0';
3043 q = arg;
3044 if (*p == '=') {
3045 p++;
3046 while (*p != '&' && *p != '\0') {
3047 if ((q - arg) < arg_size - 1) {
3048 if (*p == '+')
3049 *q++ = ' ';
3050 else
3051 *q++ = *p;
3052 }
3053 p++;
3054 }
3055 *q = '\0';
3056 }
3057 if (!strcmp(tag, tag1))
3058 return 1;
3059 if (*p != '&')
3060 break;
3061 p++;
3062 }
3063 return 0;
3064 }
3065
3066 int av_get_frame_filename(char *buf, int buf_size,
3067 const char *path, int number)
3068 {
3069 const char *p;
3070 char *q, buf1[20], c;
3071 int nd, len, percentd_found;
3072
3073 q = buf;
3074 p = path;
3075 percentd_found = 0;
3076 for(;;) {
3077 c = *p++;
3078 if (c == '\0')
3079 break;
3080 if (c == '%') {
3081 do {
3082 nd = 0;
3083 while (isdigit(*p)) {
3084 nd = nd * 10 + *p++ - '0';
3085 }
3086 c = *p++;
3087 } while (isdigit(c));
3088
3089 switch(c) {
3090 case '%':
3091 goto addchar;
3092 case 'd':
3093 if (percentd_found)
3094 goto fail;
3095 percentd_found = 1;
3096 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
3097 len = strlen(buf1);
3098 if ((q - buf + len) > buf_size - 1)
3099 goto fail;
3100 memcpy(q, buf1, len);
3101 q += len;
3102 break;
3103 default:
3104 goto fail;
3105 }
3106 } else {
3107 addchar:
3108 if ((q - buf) < buf_size - 1)
3109 *q++ = c;
3110 }
3111 }
3112 if (!percentd_found)
3113 goto fail;
3114 *q = '\0';
3115 return 0;
3116 fail:
3117 *q = '\0';
3118 return -1;
3119 }
3120
3121 static void hex_dump_internal(void *avcl, FILE *f, int level, uint8_t *buf, int size)
3122 {
3123 int len, i, j, c;
3124 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3125
3126 for(i=0;i<size;i+=16) {
3127 len = size - i;
3128 if (len > 16)
3129 len = 16;
3130 PRINT("%08x ", i);
3131 for(j=0;j<16;j++) {
3132 if (j < len)
3133 PRINT(" %02x", buf[i+j]);
3134 else
3135 PRINT(" ");
3136 }
3137 PRINT(" ");
3138 for(j=0;j<len;j++) {
3139 c = buf[i+j];
3140 if (c < ' ' || c > '~')
3141 c = '.';
3142 PRINT("%c", c);
3143 }
3144 PRINT("\n");
3145 }
3146 #undef PRINT
3147 }
3148
3149 void av_hex_dump(FILE *f, uint8_t *buf, int size)
3150 {
3151 hex_dump_internal(NULL, f, 0, buf, size);
3152 }
3153
3154 void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size)
3155 {
3156 hex_dump_internal(avcl, NULL, level, buf, size);
3157 }
3158
3159 //FIXME needs to know the time_base
3160 static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload)
3161 {
3162 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3163 PRINT("stream #%d:\n", pkt->stream_index);
3164 PRINT(" keyframe=%d\n", ((pkt->flags & PKT_FLAG_KEY) != 0));
3165 PRINT(" duration=%0.3f\n", (double)pkt->duration / AV_TIME_BASE);
3166 /* DTS is _always_ valid after av_read_frame() */
3167 PRINT(" dts=");
3168 if (pkt->dts == AV_NOPTS_VALUE)
3169 PRINT("N/A");
3170 else
3171 PRINT("%0.3f", (double)pkt->dts / AV_TIME_BASE);
3172 /* PTS may not be known if B-frames are present. */
3173 PRINT(" pts=");
3174 if (pkt->pts == AV_NOPTS_VALUE)
3175 PRINT("N/A");
3176 else
3177 PRINT("%0.3f", (double)pkt->pts / AV_TIME_BASE);
3178 PRINT("\n");
3179 PRINT(" size=%d\n", pkt->size);
3180 #undef PRINT
3181 if (dump_payload)
3182 av_hex_dump(f, pkt->data, pkt->size);
3183 }
3184
3185 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload)
3186 {
3187 pkt_dump_internal(NULL, f, 0, pkt, dump_payload);
3188 }
3189
3190 void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload)
3191 {
3192 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload);
3193 }
3194
3195 void url_split(char *proto, int proto_size,
3196 char *authorization, int authorization_size,
3197 char *hostname, int hostname_size,
3198 int *port_ptr,
3199 char *path, int path_size,
3200 const char *url)
3201 {
3202 const char *p, *ls, *at, *col, *brk;
3203
3204 if (port_ptr) *port_ptr = -1;
3205 if (proto_size > 0) proto[0] = 0;
3206 if (authorization_size > 0) authorization[0] = 0;
3207 if (hostname_size > 0) hostname[0] = 0;
3208 if (path_size > 0) path[0] = 0;
3209
3210 /* parse protocol */
3211 if ((p = strchr(url, ':'))) {
3212 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
3213 p++; /* skip ':' */
3214 if (*p == '/') p++;
3215 if (*p == '/') p++;
3216 } else {
3217 /* no protocol means plain filename */
3218 av_strlcpy(path, url, path_size);
3219 return;
3220 }
3221
3222 /* separate path from hostname */
3223 ls = strchr(p, '/');
3224 if(!ls)
3225 ls = strchr(p, '?');
3226 if(ls)
3227 av_strlcpy(path, ls, path_size);
3228 else
3229 ls = &p[strlen(p)]; // XXX
3230
3231 /* the rest is hostname, use that to parse auth/port */
3232 if (ls != p) {
3233 /* authorization (user[:pass]@hostname) */
3234 if ((at = strchr(p, '@')) && at < ls) {
3235 av_strlcpy(authorization, p,
3236 FFMIN(authorization_size, at + 1 - p));
3237 p = at + 1; /* skip '@' */
3238 }
3239
3240 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
3241 /* [host]:port */
3242 av_strlcpy(hostname, p + 1,
3243 FFMIN(hostname_size, brk - p));
3244 if (brk[1] == ':' && port_ptr)
3245 *port_ptr = atoi(brk + 2);
3246 } else if ((col = strchr(p, ':')) && col < ls) {
3247 av_strlcpy(hostname, p,
3248 FFMIN(col + 1 - p, hostname_size));
3249 if (port_ptr) *port_ptr = atoi(col + 1);
3250 } else
3251 av_strlcpy(hostname, p,
3252 FFMIN(ls + 1 - p, hostname_size));
3253 }
3254 }
3255
3256 char *ff_data_to_hex(char *buff, const uint8_t *src, int s)
3257 {
3258 int i;
3259 static const char hex_table[16] = { '0', '1', '2', '3',
3260 '4', '5', '6', '7',
3261 '8', '9', 'A', 'B',
3262 'C', 'D', 'E', 'F' };
3263
3264 for(i = 0; i < s; i++) {
3265 buff[i * 2] = hex_table[src[i] >> 4];
3266 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
3267 }
3268
3269 return buff;
3270 }
3271
3272 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
3273 int pts_num, int pts_den)
3274 {
3275 unsigned int gcd= av_gcd(pts_num, pts_den);
3276 s->pts_wrap_bits = pts_wrap_bits;
3277 s->time_base.num = pts_num/gcd;
3278 s->time_base.den = pts_den/gcd;
3279
3280 if(gcd>1)
3281 av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, gcd);
3282 }
lucabe's unfinished and experimental patches for ffmpeg