FFmpeg
utils.c
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1 /*
2  * various utility functions for use within FFmpeg
3  * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include <stdint.h>
23 
24 #include "config.h"
25 
26 #include "libavutil/avassert.h"
27 #include "libavutil/avstring.h"
28 #include "libavutil/dict.h"
29 #include "libavutil/internal.h"
30 #include "libavutil/mathematics.h"
31 #include "libavutil/opt.h"
32 #include "libavutil/parseutils.h"
33 #include "libavutil/pixfmt.h"
34 #include "libavutil/thread.h"
35 #include "libavutil/time.h"
36 #include "libavutil/timestamp.h"
37 
38 #include "libavcodec/bytestream.h"
39 #include "libavcodec/internal.h"
41 #include "libavcodec/raw.h"
42 
43 #include "avformat.h"
44 #include "avio_internal.h"
45 #include "id3v2.h"
46 #include "internal.h"
47 #if CONFIG_NETWORK
48 #include "network.h"
49 #endif
50 #include "url.h"
51 
52 #include "libavutil/ffversion.h"
53 const char av_format_ffversion[] = "FFmpeg version " FFMPEG_VERSION;
54 
56 
57 /**
58  * @file
59  * various utility functions for use within FFmpeg
60  */
61 
62 unsigned avformat_version(void)
63 {
66 }
67 
68 const char *avformat_configuration(void)
69 {
70  return FFMPEG_CONFIGURATION;
71 }
72 
73 const char *avformat_license(void)
74 {
75 #define LICENSE_PREFIX "libavformat license: "
76  return &LICENSE_PREFIX FFMPEG_LICENSE[sizeof(LICENSE_PREFIX) - 1];
77 }
78 
80 {
81  return ff_mutex_lock(&avformat_mutex) ? -1 : 0;
82 }
83 
85 {
86  return ff_mutex_unlock(&avformat_mutex) ? -1 : 0;
87 }
88 
89 #define RELATIVE_TS_BASE (INT64_MAX - (1LL<<48))
90 
91 static int is_relative(int64_t ts) {
92  return ts > (RELATIVE_TS_BASE - (1LL<<48));
93 }
94 
95 /**
96  * Wrap a given time stamp, if there is an indication for an overflow
97  *
98  * @param st stream
99  * @param timestamp the time stamp to wrap
100  * @return resulting time stamp
101  */
102 static int64_t wrap_timestamp(const AVStream *st, int64_t timestamp)
103 {
105  st->internal->pts_wrap_reference != AV_NOPTS_VALUE && timestamp != AV_NOPTS_VALUE) {
107  timestamp < st->internal->pts_wrap_reference)
108  return timestamp + (1ULL << st->pts_wrap_bits);
110  timestamp >= st->internal->pts_wrap_reference)
111  return timestamp - (1ULL << st->pts_wrap_bits);
112  }
113  return timestamp;
114 }
115 
116 #if FF_API_FORMAT_GET_SET
117 MAKE_ACCESSORS(AVStream, stream, AVRational, r_frame_rate)
118 #if FF_API_LAVF_FFSERVER
120 MAKE_ACCESSORS(AVStream, stream, char *, recommended_encoder_configuration)
122 #endif
125 MAKE_ACCESSORS(AVFormatContext, format, AVCodec *, subtitle_codec)
127 MAKE_ACCESSORS(AVFormatContext, format, int, metadata_header_padding)
128 MAKE_ACCESSORS(AVFormatContext, format, void *, opaque)
130 #if FF_API_OLD_OPEN_CALLBACKS
134 #endif
135 #endif
136 
137 int64_t av_stream_get_end_pts(const AVStream *st)
138 {
139  if (st->internal->priv_pts) {
140  return st->internal->priv_pts->val;
141  } else
142  return AV_NOPTS_VALUE;
143 }
144 
146 {
147  return st->parser;
148 }
149 
151 {
152  int i;
154  for (i = 0; i < s->nb_streams; i++) {
155  AVStream *st = s->streams[i];
157  }
158 }
159 
161 {
162  av_assert0(!dst->codec_whitelist &&
163  !dst->format_whitelist &&
164  !dst->protocol_whitelist &&
165  !dst->protocol_blacklist);
166  dst-> codec_whitelist = av_strdup(src->codec_whitelist);
170  if ( (src-> codec_whitelist && !dst-> codec_whitelist)
171  || (src-> format_whitelist && !dst-> format_whitelist)
172  || (src->protocol_whitelist && !dst->protocol_whitelist)
173  || (src->protocol_blacklist && !dst->protocol_blacklist)) {
174  av_log(dst, AV_LOG_ERROR, "Failed to duplicate black/whitelist\n");
175  return AVERROR(ENOMEM);
176  }
177  return 0;
178 }
179 
181 {
182 #if FF_API_LAVF_AVCTX
184  if (st->codec->codec)
185  return st->codec->codec;
187 #endif
188 
189  switch (st->codecpar->codec_type) {
190  case AVMEDIA_TYPE_VIDEO:
191  if (s->video_codec) return s->video_codec;
192  break;
193  case AVMEDIA_TYPE_AUDIO:
194  if (s->audio_codec) return s->audio_codec;
195  break;
197  if (s->subtitle_codec) return s->subtitle_codec;
198  break;
199  }
200 
201  return avcodec_find_decoder(codec_id);
202 }
203 
205 {
206  const AVCodec *codec;
207 
208 #if CONFIG_H264_DECODER
209  /* Other parts of the code assume this decoder to be used for h264,
210  * so force it if possible. */
211  if (codec_id == AV_CODEC_ID_H264)
212  return avcodec_find_decoder_by_name("h264");
213 #endif
214 
215  codec = find_decoder(s, st, codec_id);
216  if (!codec)
217  return NULL;
218 
220  const AVCodec *probe_codec = NULL;
221  void *iter = NULL;
222  while ((probe_codec = av_codec_iterate(&iter))) {
223  if (probe_codec->id == codec->id &&
224  av_codec_is_decoder(probe_codec) &&
226  return probe_codec;
227  }
228  }
229  }
230 
231  return codec;
232 }
233 
234 #if FF_API_FORMAT_GET_SET
235 int av_format_get_probe_score(const AVFormatContext *s)
236 {
237  return s->probe_score;
238 }
239 #endif
240 
241 /* an arbitrarily chosen "sane" max packet size -- 50M */
242 #define SANE_CHUNK_SIZE (50000000)
243 
245 {
246  if (s->maxsize>= 0) {
247  int64_t pos = avio_tell(s);
248  int64_t remaining= s->maxsize - pos;
249  if (remaining < size) {
250  int64_t newsize = avio_size(s);
251  if (!s->maxsize || s->maxsize<newsize)
252  s->maxsize = newsize - !newsize;
253  if (pos > s->maxsize && s->maxsize >= 0)
254  s->maxsize = AVERROR(EIO);
255  if (s->maxsize >= 0)
256  remaining = s->maxsize - pos;
257  }
258 
259  if (s->maxsize >= 0 && remaining < size && size > 1) {
260  av_log(NULL, remaining ? AV_LOG_ERROR : AV_LOG_DEBUG,
261  "Truncating packet of size %d to %"PRId64"\n",
262  size, remaining + !remaining);
263  size = remaining + !remaining;
264  }
265  }
266  return size;
267 }
268 
269 /* Read the data in sane-sized chunks and append to pkt.
270  * Return the number of bytes read or an error. */
272 {
273  int orig_size = pkt->size;
274  int ret;
275 
276  do {
277  int prev_size = pkt->size;
278  int read_size;
279 
280  /* When the caller requests a lot of data, limit it to the amount
281  * left in file or SANE_CHUNK_SIZE when it is not known. */
282  read_size = size;
283  if (read_size > SANE_CHUNK_SIZE/10) {
284  read_size = ffio_limit(s, read_size);
285  // If filesize/maxsize is unknown, limit to SANE_CHUNK_SIZE
286  if (s->maxsize < 0)
287  read_size = FFMIN(read_size, SANE_CHUNK_SIZE);
288  }
289 
290  ret = av_grow_packet(pkt, read_size);
291  if (ret < 0)
292  break;
293 
294  ret = avio_read(s, pkt->data + prev_size, read_size);
295  if (ret != read_size) {
296  av_shrink_packet(pkt, prev_size + FFMAX(ret, 0));
297  break;
298  }
299 
300  size -= read_size;
301  } while (size > 0);
302  if (size > 0)
303  pkt->flags |= AV_PKT_FLAG_CORRUPT;
304 
305  if (!pkt->size)
306  av_packet_unref(pkt);
307  return pkt->size > orig_size ? pkt->size - orig_size : ret;
308 }
309 
311 {
312  av_init_packet(pkt);
313  pkt->data = NULL;
314  pkt->size = 0;
315  pkt->pos = avio_tell(s);
316 
317  return append_packet_chunked(s, pkt, size);
318 }
319 
321 {
322  if (!pkt->size)
323  return av_get_packet(s, pkt, size);
324  return append_packet_chunked(s, pkt, size);
325 }
326 
327 int av_filename_number_test(const char *filename)
328 {
329  char buf[1024];
330  return filename &&
331  (av_get_frame_filename(buf, sizeof(buf), filename, 1) >= 0);
332 }
333 
335  AVProbeData *pd)
336 {
337  static const struct {
338  const char *name;
339  enum AVCodecID id;
340  enum AVMediaType type;
341  } fmt_id_type[] = {
343  { "ac3", AV_CODEC_ID_AC3, AVMEDIA_TYPE_AUDIO },
344  { "aptx", AV_CODEC_ID_APTX, AVMEDIA_TYPE_AUDIO },
345  { "dts", AV_CODEC_ID_DTS, AVMEDIA_TYPE_AUDIO },
347  { "dvbtxt", AV_CODEC_ID_DVB_TELETEXT,AVMEDIA_TYPE_SUBTITLE },
348  { "eac3", AV_CODEC_ID_EAC3, AVMEDIA_TYPE_AUDIO },
350  { "hevc", AV_CODEC_ID_HEVC, AVMEDIA_TYPE_VIDEO },
351  { "loas", AV_CODEC_ID_AAC_LATM, AVMEDIA_TYPE_AUDIO },
352  { "m4v", AV_CODEC_ID_MPEG4, AVMEDIA_TYPE_VIDEO },
353  { "mjpeg_2000",AV_CODEC_ID_JPEG2000, AVMEDIA_TYPE_VIDEO },
354  { "mp3", AV_CODEC_ID_MP3, AVMEDIA_TYPE_AUDIO },
355  { "mpegvideo", AV_CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO },
356  { "truehd", AV_CODEC_ID_TRUEHD, AVMEDIA_TYPE_AUDIO },
357  { 0 }
358  };
359  int score;
360  const AVInputFormat *fmt = av_probe_input_format3(pd, 1, &score);
361 
362  if (fmt) {
363  int i;
364  av_log(s, AV_LOG_DEBUG,
365  "Probe with size=%d, packets=%d detected %s with score=%d\n",
367  fmt->name, score);
368  for (i = 0; fmt_id_type[i].name; i++) {
369  if (!strcmp(fmt->name, fmt_id_type[i].name)) {
370  if (fmt_id_type[i].type != AVMEDIA_TYPE_AUDIO &&
371  st->codecpar->sample_rate)
372  continue;
373  if (st->internal->request_probe > score &&
374  st->codecpar->codec_id != fmt_id_type[i].id)
375  continue;
376  st->codecpar->codec_id = fmt_id_type[i].id;
377  st->codecpar->codec_type = fmt_id_type[i].type;
378  st->internal->need_context_update = 1;
379 #if FF_API_LAVF_AVCTX
381  st->codec->codec_type = st->codecpar->codec_type;
382  st->codec->codec_id = st->codecpar->codec_id;
384 #endif
385  return score;
386  }
387  }
388  }
389  return 0;
390 }
391 
392 /************************************************************/
393 /* input media file */
394 
396  int err;
397 
398  if (ic->format_whitelist && av_match_list(ic->iformat->name, ic->format_whitelist, ',') <= 0) {
399  av_log(ic, AV_LOG_ERROR, "Format not on whitelist \'%s\'\n", ic->format_whitelist);
400  return AVERROR(EINVAL);
401  }
402 
403  if (ic->iformat->read_header) {
404  err = ic->iformat->read_header(ic);
405  if (err < 0)
406  return err;
407  }
408 
409  if (ic->pb && !ic->internal->data_offset)
410  ic->internal->data_offset = avio_tell(ic->pb);
411 
412  return 0;
413 }
414 
415 /* Open input file and probe the format if necessary. */
416 static int init_input(AVFormatContext *s, const char *filename,
418 {
419  int ret;
420  AVProbeData pd = { filename, NULL, 0 };
421  int score = AVPROBE_SCORE_RETRY;
422 
423  if (s->pb) {
425  if (!s->iformat)
426  return av_probe_input_buffer2(s->pb, &s->iformat, filename,
427  s, 0, s->format_probesize);
428  else if (s->iformat->flags & AVFMT_NOFILE)
429  av_log(s, AV_LOG_WARNING, "Custom AVIOContext makes no sense and "
430  "will be ignored with AVFMT_NOFILE format.\n");
431  return 0;
432  }
433 
434  if ((s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
435  (!s->iformat && (s->iformat = av_probe_input_format2(&pd, 0, &score))))
436  return score;
437 
438  if ((ret = s->io_open(s, &s->pb, filename, AVIO_FLAG_READ | s->avio_flags, options)) < 0)
439  return ret;
440 
441  if (s->iformat)
442  return 0;
443  return av_probe_input_buffer2(s->pb, &s->iformat, filename,
444  s, 0, s->format_probesize);
445 }
446 
448 {
449  int i, ret;
450  for (i = 0; i < s->nb_streams; i++)
452  s->streams[i]->discard < AVDISCARD_ALL) {
453  if (s->streams[i]->attached_pic.size <= 0) {
455  "Attached picture on stream %d has invalid size, "
456  "ignoring\n", i);
457  continue;
458  }
459 
462  &s->streams[i]->attached_pic,
463  av_packet_ref, 0);
464  if (ret < 0)
465  return ret;
466  }
467  return 0;
468 }
469 
471 {
472  int i, ret;
473  for (i = 0; i < s->nb_streams; i++) {
474  AVStream *st = s->streams[i];
475 
476  if (!st->internal->need_context_update)
477  continue;
478 
479  /* close parser, because it depends on the codec */
480  if (st->parser && st->internal->avctx->codec_id != st->codecpar->codec_id) {
481  av_parser_close(st->parser);
482  st->parser = NULL;
483  }
484 
485  /* update internal codec context, for the parser */
487  if (ret < 0)
488  return ret;
489 
490 #if FF_API_LAVF_AVCTX
492  /* update deprecated public codec context */
493  ret = avcodec_parameters_to_context(st->codec, st->codecpar);
494  if (ret < 0)
495  return ret;
497 #endif
498 
499  st->internal->need_context_update = 0;
500  }
501  return 0;
502 }
503 
504 
505 int avformat_open_input(AVFormatContext **ps, const char *filename,
507 {
508  AVFormatContext *s = *ps;
509  int i, ret = 0;
510  AVDictionary *tmp = NULL;
511  ID3v2ExtraMeta *id3v2_extra_meta = NULL;
512 
513  if (!s && !(s = avformat_alloc_context()))
514  return AVERROR(ENOMEM);
515  if (!s->av_class) {
516  av_log(NULL, AV_LOG_ERROR, "Input context has not been properly allocated by avformat_alloc_context() and is not NULL either\n");
517  return AVERROR(EINVAL);
518  }
519  if (fmt)
520  s->iformat = fmt;
521 
522  if (options)
523  av_dict_copy(&tmp, *options, 0);
524 
525  if (s->pb) // must be before any goto fail
527 
528  if ((ret = av_opt_set_dict(s, &tmp)) < 0)
529  goto fail;
530 
531  if (!(s->url = av_strdup(filename ? filename : ""))) {
532  ret = AVERROR(ENOMEM);
533  goto fail;
534  }
535 
536 #if FF_API_FORMAT_FILENAME
538  av_strlcpy(s->filename, filename ? filename : "", sizeof(s->filename));
540 #endif
541  if ((ret = init_input(s, filename, &tmp)) < 0)
542  goto fail;
543  s->probe_score = ret;
544 
545  if (!s->protocol_whitelist && s->pb && s->pb->protocol_whitelist) {
547  if (!s->protocol_whitelist) {
548  ret = AVERROR(ENOMEM);
549  goto fail;
550  }
551  }
552 
553  if (!s->protocol_blacklist && s->pb && s->pb->protocol_blacklist) {
555  if (!s->protocol_blacklist) {
556  ret = AVERROR(ENOMEM);
557  goto fail;
558  }
559  }
560 
561  if (s->format_whitelist && av_match_list(s->iformat->name, s->format_whitelist, ',') <= 0) {
562  av_log(s, AV_LOG_ERROR, "Format not on whitelist \'%s\'\n", s->format_whitelist);
563  ret = AVERROR(EINVAL);
564  goto fail;
565  }
566 
568 
569  /* Check filename in case an image number is expected. */
570  if (s->iformat->flags & AVFMT_NEEDNUMBER) {
571  if (!av_filename_number_test(filename)) {
572  ret = AVERROR(EINVAL);
573  goto fail;
574  }
575  }
576 
578 
579  /* Allocate private data. */
580  if (s->iformat->priv_data_size > 0) {
581  if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) {
582  ret = AVERROR(ENOMEM);
583  goto fail;
584  }
585  if (s->iformat->priv_class) {
586  *(const AVClass **) s->priv_data = s->iformat->priv_class;
588  if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
589  goto fail;
590  }
591  }
592 
593  /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */
594  if (s->pb)
595  ff_id3v2_read_dict(s->pb, &s->internal->id3v2_meta, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
596 
597 
598  if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->iformat->read_header)
599  if ((ret = s->iformat->read_header(s)) < 0)
600  goto fail;
601 
602  if (!s->metadata) {
603  s->metadata = s->internal->id3v2_meta;
604  s->internal->id3v2_meta = NULL;
605  } else if (s->internal->id3v2_meta) {
606  av_log(s, AV_LOG_WARNING, "Discarding ID3 tags because more suitable tags were found.\n");
608  }
609 
610  if (id3v2_extra_meta) {
611  if (!strcmp(s->iformat->name, "mp3") || !strcmp(s->iformat->name, "aac") ||
612  !strcmp(s->iformat->name, "tta") || !strcmp(s->iformat->name, "wav")) {
613  if ((ret = ff_id3v2_parse_apic(s, id3v2_extra_meta)) < 0)
614  goto close;
615  if ((ret = ff_id3v2_parse_chapters(s, id3v2_extra_meta)) < 0)
616  goto close;
617  if ((ret = ff_id3v2_parse_priv(s, id3v2_extra_meta)) < 0)
618  goto close;
619  } else
620  av_log(s, AV_LOG_DEBUG, "demuxer does not support additional id3 data, skipping\n");
621  }
622  ff_id3v2_free_extra_meta(&id3v2_extra_meta);
623 
624  if ((ret = avformat_queue_attached_pictures(s)) < 0)
625  goto close;
626 
627  if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->pb && !s->internal->data_offset)
628  s->internal->data_offset = avio_tell(s->pb);
629 
631 
633 
634  for (i = 0; i < s->nb_streams; i++)
636 
637  if (options) {
638  av_dict_free(options);
639  *options = tmp;
640  }
641  *ps = s;
642  return 0;
643 
644 close:
645  if (s->iformat->read_close)
646  s->iformat->read_close(s);
647 fail:
648  ff_id3v2_free_extra_meta(&id3v2_extra_meta);
649  av_dict_free(&tmp);
650  if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO))
651  avio_closep(&s->pb);
653  *ps = NULL;
654  return ret;
655 }
656 
657 /*******************************************************/
658 
660 {
661  switch (st->codecpar->codec_type) {
662  case AVMEDIA_TYPE_VIDEO:
663  if (s->video_codec_id)
664  st->codecpar->codec_id = s->video_codec_id;
665  break;
666  case AVMEDIA_TYPE_AUDIO:
667  if (s->audio_codec_id)
668  st->codecpar->codec_id = s->audio_codec_id;
669  break;
671  if (s->subtitle_codec_id)
673  break;
674  case AVMEDIA_TYPE_DATA:
675  if (s->data_codec_id)
676  st->codecpar->codec_id = s->data_codec_id;
677  break;
678  }
679 }
680 
681 static int probe_codec(AVFormatContext *s, AVStream *st, const AVPacket *pkt)
682 {
683  if (st->internal->request_probe>0) {
684  AVProbeData *pd = &st->internal->probe_data;
685  int end;
686  av_log(s, AV_LOG_DEBUG, "probing stream %d pp:%d\n", st->index, st->probe_packets);
687  --st->probe_packets;
688 
689  if (pkt) {
690  uint8_t *new_buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
691  if (!new_buf) {
693  "Failed to reallocate probe buffer for stream %d\n",
694  st->index);
695  goto no_packet;
696  }
697  pd->buf = new_buf;
698  memcpy(pd->buf + pd->buf_size, pkt->data, pkt->size);
699  pd->buf_size += pkt->size;
700  memset(pd->buf + pd->buf_size, 0, AVPROBE_PADDING_SIZE);
701  } else {
702 no_packet:
703  st->probe_packets = 0;
704  if (!pd->buf_size) {
706  "nothing to probe for stream %d\n", st->index);
707  }
708  }
709 
711  || st->probe_packets<= 0;
712 
713  if (end || av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)) {
714  int score = set_codec_from_probe_data(s, st, pd);
716  || end) {
717  pd->buf_size = 0;
718  av_freep(&pd->buf);
719  st->internal->request_probe = -1;
720  if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
721  av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
722  } else
723  av_log(s, AV_LOG_WARNING, "probed stream %d failed\n", st->index);
724  }
725  force_codec_ids(s, st);
726  }
727  }
728  return 0;
729 }
730 
731 static int update_wrap_reference(AVFormatContext *s, AVStream *st, int stream_index, AVPacket *pkt)
732 {
733  int64_t ref = pkt->dts;
734  int i, pts_wrap_behavior;
735  int64_t pts_wrap_reference;
736  AVProgram *first_program;
737 
738  if (ref == AV_NOPTS_VALUE)
739  ref = pkt->pts;
741  return 0;
742  ref &= (1LL << st->pts_wrap_bits)-1;
743 
744  // reference time stamp should be 60 s before first time stamp
745  pts_wrap_reference = ref - av_rescale(60, st->time_base.den, st->time_base.num);
746  // if first time stamp is not more than 1/8 and 60s before the wrap point, subtract rather than add wrap offset
747  pts_wrap_behavior = (ref < (1LL << st->pts_wrap_bits) - (1LL << st->pts_wrap_bits-3)) ||
748  (ref < (1LL << st->pts_wrap_bits) - av_rescale(60, st->time_base.den, st->time_base.num)) ?
750 
751  first_program = av_find_program_from_stream(s, NULL, stream_index);
752 
753  if (!first_program) {
754  int default_stream_index = av_find_default_stream_index(s);
755  if (s->streams[default_stream_index]->internal->pts_wrap_reference == AV_NOPTS_VALUE) {
756  for (i = 0; i < s->nb_streams; i++) {
758  continue;
759  s->streams[i]->internal->pts_wrap_reference = pts_wrap_reference;
760  s->streams[i]->internal->pts_wrap_behavior = pts_wrap_behavior;
761  }
762  }
763  else {
764  st->internal->pts_wrap_reference = s->streams[default_stream_index]->internal->pts_wrap_reference;
765  st->internal->pts_wrap_behavior = s->streams[default_stream_index]->internal->pts_wrap_behavior;
766  }
767  }
768  else {
769  AVProgram *program = first_program;
770  while (program) {
771  if (program->pts_wrap_reference != AV_NOPTS_VALUE) {
772  pts_wrap_reference = program->pts_wrap_reference;
773  pts_wrap_behavior = program->pts_wrap_behavior;
774  break;
775  }
776  program = av_find_program_from_stream(s, program, stream_index);
777  }
778 
779  // update every program with differing pts_wrap_reference
780  program = first_program;
781  while (program) {
782  if (program->pts_wrap_reference != pts_wrap_reference) {
783  for (i = 0; i<program->nb_stream_indexes; i++) {
784  s->streams[program->stream_index[i]]->internal->pts_wrap_reference = pts_wrap_reference;
785  s->streams[program->stream_index[i]]->internal->pts_wrap_behavior = pts_wrap_behavior;
786  }
787 
788  program->pts_wrap_reference = pts_wrap_reference;
789  program->pts_wrap_behavior = pts_wrap_behavior;
790  }
791  program = av_find_program_from_stream(s, program, stream_index);
792  }
793  }
794  return 1;
795 }
796 
798 {
799  int ret, i, err;
800  AVStream *st;
801 
802  pkt->data = NULL;
803  pkt->size = 0;
804  av_init_packet(pkt);
805 
806  for (;;) {
808  const AVPacket *pkt1;
809 
810  if (pktl) {
811  st = s->streams[pktl->pkt.stream_index];
813  if ((err = probe_codec(s, st, NULL)) < 0)
814  return err;
815  if (st->internal->request_probe <= 0) {
817  &s->internal->raw_packet_buffer_end, pkt);
819  return 0;
820  }
821  }
822 
823  ret = s->iformat->read_packet(s, pkt);
824  if (ret < 0) {
825  av_packet_unref(pkt);
826 
827  /* Some demuxers return FFERROR_REDO when they consume
828  data and discard it (ignored streams, junk, extradata).
829  We must re-call the demuxer to get the real packet. */
830  if (ret == FFERROR_REDO)
831  continue;
832  if (!pktl || ret == AVERROR(EAGAIN))
833  return ret;
834  for (i = 0; i < s->nb_streams; i++) {
835  st = s->streams[i];
836  if (st->probe_packets || st->internal->request_probe > 0)
837  if ((err = probe_codec(s, st, NULL)) < 0)
838  return err;
839  av_assert0(st->internal->request_probe <= 0);
840  }
841  continue;
842  }
843 
844  err = av_packet_make_refcounted(pkt);
845  if (err < 0) {
846  av_packet_unref(pkt);
847  return err;
848  }
849 
850  if (pkt->flags & AV_PKT_FLAG_CORRUPT) {
852  "Packet corrupt (stream = %d, dts = %s)",
853  pkt->stream_index, av_ts2str(pkt->dts));
855  av_log(s, AV_LOG_WARNING, ", dropping it.\n");
856  av_packet_unref(pkt);
857  continue;
858  }
859  av_log(s, AV_LOG_WARNING, ".\n");
860  }
861 
862  av_assert0(pkt->stream_index < (unsigned)s->nb_streams &&
863  "Invalid stream index.\n");
864 
865  st = s->streams[pkt->stream_index];
866 
868  // correct first time stamps to negative values
869  if (!is_relative(st->first_dts))
870  st->first_dts = wrap_timestamp(st, st->first_dts);
871  if (!is_relative(st->start_time))
872  st->start_time = wrap_timestamp(st, st->start_time);
873  if (!is_relative(st->cur_dts))
874  st->cur_dts = wrap_timestamp(st, st->cur_dts);
875  }
876 
877  pkt->dts = wrap_timestamp(st, pkt->dts);
878  pkt->pts = wrap_timestamp(st, pkt->pts);
879 
880  force_codec_ids(s, st);
881 
882  /* TODO: audio: time filter; video: frame reordering (pts != dts) */
884  pkt->dts = pkt->pts = av_rescale_q(av_gettime(), AV_TIME_BASE_Q, st->time_base);
885 
886  if (!pktl && st->internal->request_probe <= 0)
887  return ret;
888 
891  pkt, NULL, 0);
892  if (err < 0) {
893  av_packet_unref(pkt);
894  return err;
895  }
896  pkt1 = &s->internal->raw_packet_buffer_end->pkt;
898 
899  if ((err = probe_codec(s, st, pkt1)) < 0)
900  return err;
901  }
902 }
903 
904 
905 /**********************************************************/
906 
908 {
909  switch(avctx->codec_id) {
910  case AV_CODEC_ID_MP1:
911  case AV_CODEC_ID_MP2:
912  case AV_CODEC_ID_MP3:
913  case AV_CODEC_ID_CODEC2:
914  return 1;
915  }
916 
917  return 0;
918 }
919 
920 /**
921  * Return the frame duration in seconds. Return 0 if not available.
922  */
923 void ff_compute_frame_duration(AVFormatContext *s, int *pnum, int *pden, AVStream *st,
925 {
926  AVRational codec_framerate = s->iformat ? st->internal->avctx->framerate :
927  av_mul_q(av_inv_q(st->internal->avctx->time_base), (AVRational){1, st->internal->avctx->ticks_per_frame});
928  int frame_size, sample_rate;
929 
930 #if FF_API_LAVF_AVCTX
932  if ((!codec_framerate.den || !codec_framerate.num) && st->codec->time_base.den && st->codec->time_base.num)
933  codec_framerate = av_mul_q(av_inv_q(st->codec->time_base), (AVRational){1, st->codec->ticks_per_frame});
935 #endif
936 
937  *pnum = 0;
938  *pden = 0;
939  switch (st->codecpar->codec_type) {
940  case AVMEDIA_TYPE_VIDEO:
941  if (st->r_frame_rate.num && !pc && s->iformat) {
942  *pnum = st->r_frame_rate.den;
943  *pden = st->r_frame_rate.num;
944  } else if (st->time_base.num * 1000LL > st->time_base.den) {
945  *pnum = st->time_base.num;
946  *pden = st->time_base.den;
947  } else if (codec_framerate.den * 1000LL > codec_framerate.num) {
949  av_reduce(pnum, pden,
950  codec_framerate.den,
951  codec_framerate.num * (int64_t)st->internal->avctx->ticks_per_frame,
952  INT_MAX);
953 
954  if (pc && pc->repeat_pict) {
955  av_assert0(s->iformat); // this may be wrong for interlaced encoding but its not used for that case
956  av_reduce(pnum, pden,
957  (*pnum) * (1LL + pc->repeat_pict),
958  (*pden),
959  INT_MAX);
960  }
961  /* If this codec can be interlaced or progressive then we need
962  * a parser to compute duration of a packet. Thus if we have
963  * no parser in such case leave duration undefined. */
964  if (st->internal->avctx->ticks_per_frame > 1 && !pc)
965  *pnum = *pden = 0;
966  }
967  break;
968  case AVMEDIA_TYPE_AUDIO:
969  if (st->internal->avctx_inited) {
970  frame_size = av_get_audio_frame_duration(st->internal->avctx, pkt->size);
971  sample_rate = st->internal->avctx->sample_rate;
972  } else {
973  frame_size = av_get_audio_frame_duration2(st->codecpar, pkt->size);
974  sample_rate = st->codecpar->sample_rate;
975  }
976  if (frame_size <= 0 || sample_rate <= 0)
977  break;
978  *pnum = frame_size;
979  *pden = sample_rate;
980  break;
981  default:
982  break;
983  }
984 }
985 
987 {
989  if (!d)
990  return 0;
991  if ((d->type == AVMEDIA_TYPE_VIDEO || d->type == AVMEDIA_TYPE_AUDIO) &&
993  return 0;
994  return 1;
995 }
996 
998 {
999  if (st->codecpar->codec_id != AV_CODEC_ID_H264) return 1;
1000  if (!st->internal->info) // if we have left find_stream_info then nb_decoded_frames won't increase anymore for stream copy
1001  return 1;
1002 #if CONFIG_H264_DECODER
1003  if (st->internal->avctx->has_b_frames &&
1005  return 1;
1006 #endif
1007  if (st->internal->avctx->has_b_frames<3)
1008  return st->internal->nb_decoded_frames >= 7;
1009  else if (st->internal->avctx->has_b_frames<4)
1010  return st->internal->nb_decoded_frames >= 18;
1011  else
1012  return st->internal->nb_decoded_frames >= 20;
1013 }
1014 
1016 {
1017  if (pktl->next)
1018  return pktl->next;
1019  if (pktl == s->internal->packet_buffer_end)
1020  return s->internal->parse_queue;
1021  return NULL;
1022 }
1023 
1024 static int64_t select_from_pts_buffer(AVStream *st, int64_t *pts_buffer, int64_t dts) {
1025  int onein_oneout = st->codecpar->codec_id != AV_CODEC_ID_H264 &&
1027 
1028  if(!onein_oneout) {
1029  int delay = st->internal->avctx->has_b_frames;
1030  int i;
1031 
1032  if (dts == AV_NOPTS_VALUE) {
1033  int64_t best_score = INT64_MAX;
1034  for (i = 0; i<delay; i++) {
1035  if (st->internal->pts_reorder_error_count[i]) {
1036  int64_t score = st->internal->pts_reorder_error[i] / st->internal->pts_reorder_error_count[i];
1037  if (score < best_score) {
1038  best_score = score;
1039  dts = pts_buffer[i];
1040  }
1041  }
1042  }
1043  } else {
1044  for (i = 0; i<delay; i++) {
1045  if (pts_buffer[i] != AV_NOPTS_VALUE) {
1046  int64_t diff = FFABS(pts_buffer[i] - dts)
1047  + (uint64_t)st->internal->pts_reorder_error[i];
1048  diff = FFMAX(diff, st->internal->pts_reorder_error[i]);
1049  st->internal->pts_reorder_error[i] = diff;
1051  if (st->internal->pts_reorder_error_count[i] > 250) {
1052  st->internal->pts_reorder_error[i] >>= 1;
1053  st->internal->pts_reorder_error_count[i] >>= 1;
1054  }
1055  }
1056  }
1057  }
1058  }
1059 
1060  if (dts == AV_NOPTS_VALUE)
1061  dts = pts_buffer[0];
1062 
1063  return dts;
1064 }
1065 
1066 /**
1067  * Updates the dts of packets of a stream in pkt_buffer, by re-ordering the pts
1068  * of the packets in a window.
1069  */
1070 static void update_dts_from_pts(AVFormatContext *s, int stream_index,
1071  AVPacketList *pkt_buffer)
1072 {
1073  AVStream *st = s->streams[stream_index];
1074  int delay = st->internal->avctx->has_b_frames;
1075  int i;
1076 
1077  int64_t pts_buffer[MAX_REORDER_DELAY+1];
1078 
1079  for (i = 0; i<MAX_REORDER_DELAY+1; i++)
1080  pts_buffer[i] = AV_NOPTS_VALUE;
1081 
1082  for (; pkt_buffer; pkt_buffer = get_next_pkt(s, st, pkt_buffer)) {
1083  if (pkt_buffer->pkt.stream_index != stream_index)
1084  continue;
1085 
1086  if (pkt_buffer->pkt.pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
1087  pts_buffer[0] = pkt_buffer->pkt.pts;
1088  for (i = 0; i<delay && pts_buffer[i] > pts_buffer[i + 1]; i++)
1089  FFSWAP(int64_t, pts_buffer[i], pts_buffer[i + 1]);
1090 
1091  pkt_buffer->pkt.dts = select_from_pts_buffer(st, pts_buffer, pkt_buffer->pkt.dts);
1092  }
1093  }
1094 }
1095 
1096 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
1097  int64_t dts, int64_t pts, AVPacket *pkt)
1098 {
1099  AVStream *st = s->streams[stream_index];
1101  AVPacketList *pktl_it;
1102 
1103  uint64_t shift;
1104 
1105  if (st->first_dts != AV_NOPTS_VALUE ||
1106  dts == AV_NOPTS_VALUE ||
1107  st->cur_dts == AV_NOPTS_VALUE ||
1108  st->cur_dts < INT_MIN + RELATIVE_TS_BASE ||
1109  dts < INT_MIN + (st->cur_dts - RELATIVE_TS_BASE) ||
1110  is_relative(dts))
1111  return;
1112 
1113  st->first_dts = dts - (st->cur_dts - RELATIVE_TS_BASE);
1114  st->cur_dts = dts;
1115  shift = (uint64_t)st->first_dts - RELATIVE_TS_BASE;
1116 
1117  if (is_relative(pts))
1118  pts += shift;
1119 
1120  for (pktl_it = pktl; pktl_it; pktl_it = get_next_pkt(s, st, pktl_it)) {
1121  if (pktl_it->pkt.stream_index != stream_index)
1122  continue;
1123  if (is_relative(pktl_it->pkt.pts))
1124  pktl_it->pkt.pts += shift;
1125 
1126  if (is_relative(pktl_it->pkt.dts))
1127  pktl_it->pkt.dts += shift;
1128 
1129  if (st->start_time == AV_NOPTS_VALUE && pktl_it->pkt.pts != AV_NOPTS_VALUE) {
1130  st->start_time = pktl_it->pkt.pts;
1132  st->start_time = av_sat_add64(st->start_time, av_rescale_q(st->internal->skip_samples, (AVRational){1, st->codecpar->sample_rate}, st->time_base));
1133  }
1134  }
1135 
1137  update_dts_from_pts(s, stream_index, pktl);
1138  }
1139 
1140  if (st->start_time == AV_NOPTS_VALUE) {
1141  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO || !(pkt->flags & AV_PKT_FLAG_DISCARD)) {
1142  st->start_time = pts;
1143  }
1145  st->start_time = av_sat_add64(st->start_time, av_rescale_q(st->internal->skip_samples, (AVRational){1, st->codecpar->sample_rate}, st->time_base));
1146  }
1147 }
1148 
1150  int stream_index, int64_t duration)
1151 {
1153  int64_t cur_dts = RELATIVE_TS_BASE;
1154 
1155  if (st->first_dts != AV_NOPTS_VALUE) {
1157  return;
1159  cur_dts = st->first_dts;
1160  for (; pktl; pktl = get_next_pkt(s, st, pktl)) {
1161  if (pktl->pkt.stream_index == stream_index) {
1162  if (pktl->pkt.pts != pktl->pkt.dts ||
1163  pktl->pkt.dts != AV_NOPTS_VALUE ||
1164  pktl->pkt.duration)
1165  break;
1166  cur_dts -= duration;
1167  }
1168  }
1169  if (pktl && pktl->pkt.dts != st->first_dts) {
1170  av_log(s, AV_LOG_DEBUG, "first_dts %s not matching first dts %s (pts %s, duration %"PRId64") in the queue\n",
1171  av_ts2str(st->first_dts), av_ts2str(pktl->pkt.dts), av_ts2str(pktl->pkt.pts), pktl->pkt.duration);
1172  return;
1173  }
1174  if (!pktl) {
1175  av_log(s, AV_LOG_DEBUG, "first_dts %s but no packet with dts in the queue\n", av_ts2str(st->first_dts));
1176  return;
1177  }
1179  st->first_dts = cur_dts;
1180  } else if (st->cur_dts != RELATIVE_TS_BASE)
1181  return;
1182 
1183  for (; pktl; pktl = get_next_pkt(s, st, pktl)) {
1184  if (pktl->pkt.stream_index != stream_index)
1185  continue;
1186  if ((pktl->pkt.pts == pktl->pkt.dts ||
1187  pktl->pkt.pts == AV_NOPTS_VALUE) &&
1188  (pktl->pkt.dts == AV_NOPTS_VALUE ||
1189  pktl->pkt.dts == st->first_dts ||
1190  pktl->pkt.dts == RELATIVE_TS_BASE) &&
1191  !pktl->pkt.duration) {
1192  pktl->pkt.dts = cur_dts;
1193  if (!st->internal->avctx->has_b_frames)
1194  pktl->pkt.pts = cur_dts;
1195  pktl->pkt.duration = duration;
1196  } else
1197  break;
1198  cur_dts = pktl->pkt.dts + pktl->pkt.duration;
1199  }
1200  if (!pktl)
1201  st->cur_dts = cur_dts;
1202 }
1203 
1206  int64_t next_dts, int64_t next_pts)
1207 {
1208  int num, den, presentation_delayed, delay, i;
1209  int64_t offset;
1211  int onein_oneout = st->codecpar->codec_id != AV_CODEC_ID_H264 &&
1213 
1214  if (s->flags & AVFMT_FLAG_NOFILLIN)
1215  return;
1216 
1217  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && pkt->dts != AV_NOPTS_VALUE) {
1218  if (pkt->dts == pkt->pts && st->internal->last_dts_for_order_check != AV_NOPTS_VALUE) {
1219  if (st->internal->last_dts_for_order_check <= pkt->dts) {
1220  st->internal->dts_ordered++;
1221  } else {
1223  "DTS %"PRIi64" < %"PRIi64" out of order\n",
1224  pkt->dts,
1226  st->internal->dts_misordered++;
1227  }
1228  if (st->internal->dts_ordered + st->internal->dts_misordered > 250) {
1229  st->internal->dts_ordered >>= 1;
1230  st->internal->dts_misordered >>= 1;
1231  }
1232  }
1233 
1235  if (st->internal->dts_ordered < 8*st->internal->dts_misordered && pkt->dts == pkt->pts)
1236  pkt->dts = AV_NOPTS_VALUE;
1237  }
1238 
1239  if ((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
1240  pkt->dts = AV_NOPTS_VALUE;
1241 
1242  if (pc && pc->pict_type == AV_PICTURE_TYPE_B
1243  && !st->internal->avctx->has_b_frames)
1244  //FIXME Set low_delay = 0 when has_b_frames = 1
1245  st->internal->avctx->has_b_frames = 1;
1246 
1247  /* do we have a video B-frame ? */
1248  delay = st->internal->avctx->has_b_frames;
1249  presentation_delayed = 0;
1250 
1251  /* XXX: need has_b_frame, but cannot get it if the codec is
1252  * not initialized */
1253  if (delay &&
1254  pc && pc->pict_type != AV_PICTURE_TYPE_B)
1255  presentation_delayed = 1;
1256 
1257  if (pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE &&
1258  st->pts_wrap_bits < 63 && pkt->dts > INT64_MIN + (1LL << (st->pts_wrap_bits - 1)) &&
1259  pkt->dts - (1LL << (st->pts_wrap_bits - 1)) > pkt->pts) {
1260  if (is_relative(st->cur_dts) || pkt->dts - (1LL<<(st->pts_wrap_bits - 1)) > st->cur_dts) {
1261  pkt->dts -= 1LL << st->pts_wrap_bits;
1262  } else
1263  pkt->pts += 1LL << st->pts_wrap_bits;
1264  }
1265 
1266  /* Some MPEG-2 in MPEG-PS lack dts (issue #171 / input_file.mpg).
1267  * We take the conservative approach and discard both.
1268  * Note: If this is misbehaving for an H.264 file, then possibly
1269  * presentation_delayed is not set correctly. */
1270  if (delay == 1 && pkt->dts == pkt->pts &&
1271  pkt->dts != AV_NOPTS_VALUE && presentation_delayed) {
1272  av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination %"PRIi64"\n", pkt->dts);
1273  if ( strcmp(s->iformat->name, "mov,mp4,m4a,3gp,3g2,mj2")
1274  && strcmp(s->iformat->name, "flv")) // otherwise we discard correct timestamps for vc1-wmapro.ism
1275  pkt->dts = AV_NOPTS_VALUE;
1276  }
1277 
1278  duration = av_mul_q((AVRational) {pkt->duration, 1}, st->time_base);
1279  if (pkt->duration <= 0) {
1280  ff_compute_frame_duration(s, &num, &den, st, pc, pkt);
1281  if (den && num) {
1282  duration = (AVRational) {num, den};
1283  pkt->duration = av_rescale_rnd(1,
1284  num * (int64_t) st->time_base.den,
1285  den * (int64_t) st->time_base.num,
1286  AV_ROUND_DOWN);
1287  }
1288  }
1289 
1290  if (pkt->duration > 0 && (s->internal->packet_buffer || s->internal->parse_queue))
1291  update_initial_durations(s, st, pkt->stream_index, pkt->duration);
1292 
1293  /* Correct timestamps with byte offset if demuxers only have timestamps
1294  * on packet boundaries */
1295  if (pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size) {
1296  /* this will estimate bitrate based on this frame's duration and size */
1297  offset = av_rescale(pc->offset, pkt->duration, pkt->size);
1298  if (pkt->pts != AV_NOPTS_VALUE)
1299  pkt->pts += offset;
1300  if (pkt->dts != AV_NOPTS_VALUE)
1301  pkt->dts += offset;
1302  }
1303 
1304  /* This may be redundant, but it should not hurt. */
1305  if (pkt->dts != AV_NOPTS_VALUE &&
1306  pkt->pts != AV_NOPTS_VALUE &&
1307  pkt->pts > pkt->dts)
1308  presentation_delayed = 1;
1309 
1310  if (s->debug & FF_FDEBUG_TS)
1311  av_log(s, AV_LOG_DEBUG,
1312  "IN delayed:%d pts:%s, dts:%s cur_dts:%s st:%d pc:%p duration:%"PRId64" delay:%d onein_oneout:%d\n",
1313  presentation_delayed, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts),
1314  pkt->stream_index, pc, pkt->duration, delay, onein_oneout);
1315 
1316  /* Interpolate PTS and DTS if they are not present. We skip H264
1317  * currently because delay and has_b_frames are not reliably set. */
1318  if ((delay == 0 || (delay == 1 && pc)) &&
1319  onein_oneout) {
1320  if (presentation_delayed) {
1321  /* DTS = decompression timestamp */
1322  /* PTS = presentation timestamp */
1323  if (pkt->dts == AV_NOPTS_VALUE)
1324  pkt->dts = st->last_IP_pts;
1325  update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts, pkt);
1326  if (pkt->dts == AV_NOPTS_VALUE)
1327  pkt->dts = st->cur_dts;
1328 
1329  /* This is tricky: the dts must be incremented by the duration
1330  * of the frame we are displaying, i.e. the last I- or P-frame. */
1331  if (st->last_IP_duration == 0 && (uint64_t)pkt->duration <= INT32_MAX)
1332  st->last_IP_duration = pkt->duration;
1333  if (pkt->dts != AV_NOPTS_VALUE)
1334  st->cur_dts = av_sat_add64(pkt->dts, st->last_IP_duration);
1335  if (pkt->dts != AV_NOPTS_VALUE &&
1336  pkt->pts == AV_NOPTS_VALUE &&
1337  st->last_IP_duration > 0 &&
1338  ((uint64_t)st->cur_dts - (uint64_t)next_dts + 1) <= 2 &&
1339  next_dts != next_pts &&
1340  next_pts != AV_NOPTS_VALUE)
1341  pkt->pts = next_dts;
1342 
1343  if ((uint64_t)pkt->duration <= INT32_MAX)
1344  st->last_IP_duration = pkt->duration;
1345  st->last_IP_pts = pkt->pts;
1346  /* Cannot compute PTS if not present (we can compute it only
1347  * by knowing the future. */
1348  } else if (pkt->pts != AV_NOPTS_VALUE ||
1349  pkt->dts != AV_NOPTS_VALUE ||
1350  pkt->duration > 0 ) {
1351 
1352  /* presentation is not delayed : PTS and DTS are the same */
1353  if (pkt->pts == AV_NOPTS_VALUE)
1354  pkt->pts = pkt->dts;
1356  pkt->pts, pkt);
1357  if (pkt->pts == AV_NOPTS_VALUE)
1358  pkt->pts = st->cur_dts;
1359  pkt->dts = pkt->pts;
1360  if (pkt->pts != AV_NOPTS_VALUE && duration.num >= 0)
1361  st->cur_dts = av_add_stable(st->time_base, pkt->pts, duration, 1);
1362  }
1363  }
1364 
1365  if (pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
1366  st->internal->pts_buffer[0] = pkt->pts;
1367  for (i = 0; i<delay && st->internal->pts_buffer[i] > st->internal->pts_buffer[i + 1]; i++)
1368  FFSWAP(int64_t, st->internal->pts_buffer[i], st->internal->pts_buffer[i + 1]);
1369 
1371  pkt->dts = select_from_pts_buffer(st, st->internal->pts_buffer, pkt->dts);
1372  }
1373  // We skipped it above so we try here.
1374  if (!onein_oneout)
1375  // This should happen on the first packet
1376  update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts, pkt);
1377  if (pkt->dts > st->cur_dts)
1378  st->cur_dts = pkt->dts;
1379 
1380  if (s->debug & FF_FDEBUG_TS)
1381  av_log(s, AV_LOG_DEBUG, "OUTdelayed:%d/%d pts:%s, dts:%s cur_dts:%s st:%d (%d)\n",
1382  presentation_delayed, delay, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), st->index, st->id);
1383 
1384  /* update flags */
1386  pkt->flags |= AV_PKT_FLAG_KEY;
1387 #if FF_API_CONVERGENCE_DURATION
1389  if (pc)
1390  pkt->convergence_duration = pc->convergence_duration;
1392 #endif
1393 }
1394 
1395 /**
1396  * Parse a packet, add all split parts to parse_queue.
1397  *
1398  * @param pkt Packet to parse; must not be NULL.
1399  * @param flush Indicates whether to flush. If set, pkt must be blank.
1400  */
1402  int stream_index, int flush)
1403 {
1404  AVPacket out_pkt;
1405  AVStream *st = s->streams[stream_index];
1406  uint8_t *data = pkt->data;
1407  int size = pkt->size;
1408  int ret = 0, got_output = flush;
1409 
1410  if (size || flush) {
1411  av_init_packet(&out_pkt);
1412  } else if (st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) {
1413  // preserve 0-size sync packets
1415  }
1416 
1417  while (size > 0 || (flush && got_output)) {
1418  int len;
1419  int64_t next_pts = pkt->pts;
1420  int64_t next_dts = pkt->dts;
1421 
1422  len = av_parser_parse2(st->parser, st->internal->avctx,
1423  &out_pkt.data, &out_pkt.size, data, size,
1424  pkt->pts, pkt->dts, pkt->pos);
1425 
1426  pkt->pts = pkt->dts = AV_NOPTS_VALUE;
1427  pkt->pos = -1;
1428  /* increment read pointer */
1429  av_assert1(data || !len);
1430  data = len ? data + len : data;
1431  size -= len;
1432 
1433  got_output = !!out_pkt.size;
1434 
1435  if (!out_pkt.size)
1436  continue;
1437 
1438  if (pkt->buf && out_pkt.data == pkt->data) {
1439  /* reference pkt->buf only when out_pkt.data is guaranteed to point
1440  * to data in it and not in the parser's internal buffer. */
1441  /* XXX: Ensure this is the case with all parsers when st->parser->flags
1442  * is PARSER_FLAG_COMPLETE_FRAMES and check for that instead? */
1443  out_pkt.buf = av_buffer_ref(pkt->buf);
1444  if (!out_pkt.buf) {
1445  ret = AVERROR(ENOMEM);
1446  goto fail;
1447  }
1448  } else {
1449  ret = av_packet_make_refcounted(&out_pkt);
1450  if (ret < 0)
1451  goto fail;
1452  }
1453 
1454  if (pkt->side_data) {
1455  out_pkt.side_data = pkt->side_data;
1456  out_pkt.side_data_elems = pkt->side_data_elems;
1457  pkt->side_data = NULL;
1458  pkt->side_data_elems = 0;
1459  }
1460 
1461  /* set the duration */
1462  out_pkt.duration = (st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) ? pkt->duration : 0;
1464  if (st->internal->avctx->sample_rate > 0) {
1465  out_pkt.duration =
1467  (AVRational) { 1, st->internal->avctx->sample_rate },
1468  st->time_base,
1469  AV_ROUND_DOWN);
1470  }
1471  }
1472 
1473  out_pkt.stream_index = st->index;
1474  out_pkt.pts = st->parser->pts;
1475  out_pkt.dts = st->parser->dts;
1476  out_pkt.pos = st->parser->pos;
1477  out_pkt.flags |= pkt->flags & AV_PKT_FLAG_DISCARD;
1478 
1480  out_pkt.pos = st->parser->frame_offset;
1481 
1482  if (st->parser->key_frame == 1 ||
1483  (st->parser->key_frame == -1 &&
1485  out_pkt.flags |= AV_PKT_FLAG_KEY;
1486 
1487  if (st->parser->key_frame == -1 && st->parser->pict_type ==AV_PICTURE_TYPE_NONE && (pkt->flags&AV_PKT_FLAG_KEY))
1488  out_pkt.flags |= AV_PKT_FLAG_KEY;
1489 
1490  compute_pkt_fields(s, st, st->parser, &out_pkt, next_dts, next_pts);
1491 
1494  &out_pkt, NULL, 0);
1495  if (ret < 0) {
1496  av_packet_unref(&out_pkt);
1497  goto fail;
1498  }
1499  }
1500 
1501  /* end of the stream => close and free the parser */
1502  if (flush) {
1503  av_parser_close(st->parser);
1504  st->parser = NULL;
1505  }
1506 
1507 fail:
1508  av_packet_unref(pkt);
1509  return ret;
1510 }
1511 
1512 static int64_t ts_to_samples(AVStream *st, int64_t ts)
1513 {
1514  return av_rescale(ts, st->time_base.num * st->codecpar->sample_rate, st->time_base.den);
1515 }
1516 
1518 {
1519  int ret, i, got_packet = 0;
1520  AVDictionary *metadata = NULL;
1521 
1522  while (!got_packet && !s->internal->parse_queue) {
1523  AVStream *st;
1524 
1525  /* read next packet */
1526  ret = ff_read_packet(s, pkt);
1527  if (ret < 0) {
1528  if (ret == AVERROR(EAGAIN))
1529  return ret;
1530  /* flush the parsers */
1531  for (i = 0; i < s->nb_streams; i++) {
1532  st = s->streams[i];
1533  if (st->parser && st->need_parsing)
1534  parse_packet(s, pkt, st->index, 1);
1535  }
1536  /* all remaining packets are now in parse_queue =>
1537  * really terminate parsing */
1538  break;
1539  }
1540  ret = 0;
1541  st = s->streams[pkt->stream_index];
1542 
1544 
1545  /* update context if required */
1546  if (st->internal->need_context_update) {
1547  if (avcodec_is_open(st->internal->avctx)) {
1548  av_log(s, AV_LOG_DEBUG, "Demuxer context update while decoder is open, closing and trying to re-open\n");
1550  st->internal->info->found_decoder = 0;
1551  }
1552 
1553  /* close parser, because it depends on the codec */
1554  if (st->parser && st->internal->avctx->codec_id != st->codecpar->codec_id) {
1555  av_parser_close(st->parser);
1556  st->parser = NULL;
1557  }
1558 
1560  if (ret < 0) {
1561  av_packet_unref(pkt);
1562  return ret;
1563  }
1564 
1565 #if FF_API_LAVF_AVCTX
1567  /* update deprecated public codec context */
1568  ret = avcodec_parameters_to_context(st->codec, st->codecpar);
1569  if (ret < 0) {
1570  av_packet_unref(pkt);
1571  return ret;
1572  }
1574 #endif
1575 
1576  st->internal->need_context_update = 0;
1577  }
1578 
1579  if (pkt->pts != AV_NOPTS_VALUE &&
1580  pkt->dts != AV_NOPTS_VALUE &&
1581  pkt->pts < pkt->dts) {
1583  "Invalid timestamps stream=%d, pts=%s, dts=%s, size=%d\n",
1584  pkt->stream_index,
1585  av_ts2str(pkt->pts),
1586  av_ts2str(pkt->dts),
1587  pkt->size);
1588  }
1589  if (s->debug & FF_FDEBUG_TS)
1590  av_log(s, AV_LOG_DEBUG,
1591  "ff_read_packet stream=%d, pts=%s, dts=%s, size=%d, duration=%"PRId64", flags=%d\n",
1592  pkt->stream_index,
1593  av_ts2str(pkt->pts),
1594  av_ts2str(pkt->dts),
1595  pkt->size, pkt->duration, pkt->flags);
1596 
1597  if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1598  st->parser = av_parser_init(st->codecpar->codec_id);
1599  if (!st->parser) {
1600  av_log(s, AV_LOG_VERBOSE, "parser not found for codec "
1601  "%s, packets or times may be invalid.\n",
1603  /* no parser available: just output the raw packets */
1605  } else if (st->need_parsing == AVSTREAM_PARSE_HEADERS)
1607  else if (st->need_parsing == AVSTREAM_PARSE_FULL_ONCE)
1608  st->parser->flags |= PARSER_FLAG_ONCE;
1609  else if (st->need_parsing == AVSTREAM_PARSE_FULL_RAW)
1611  }
1612 
1613  if (!st->need_parsing || !st->parser) {
1614  /* no parsing needed: we just output the packet as is */
1616  if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1617  (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1618  ff_reduce_index(s, st->index);
1619  av_add_index_entry(st, pkt->pos, pkt->dts,
1620  0, 0, AVINDEX_KEYFRAME);
1621  }
1622  got_packet = 1;
1623  } else if (st->discard < AVDISCARD_ALL) {
1624  if ((ret = parse_packet(s, pkt, pkt->stream_index, 0)) < 0)
1625  return ret;
1627  st->codecpar->bit_rate = st->internal->avctx->bit_rate;
1628  st->codecpar->channels = st->internal->avctx->channels;
1630  st->codecpar->codec_id = st->internal->avctx->codec_id;
1631  } else {
1632  /* free packet */
1633  av_packet_unref(pkt);
1634  }
1635  if (pkt->flags & AV_PKT_FLAG_KEY)
1636  st->internal->skip_to_keyframe = 0;
1637  if (st->internal->skip_to_keyframe) {
1638  av_packet_unref(pkt);
1639  got_packet = 0;
1640  }
1641  }
1642 
1643  if (!got_packet && s->internal->parse_queue)
1645 
1646  if (ret >= 0) {
1647  AVStream *st = s->streams[pkt->stream_index];
1648  int discard_padding = 0;
1649  if (st->internal->first_discard_sample && pkt->pts != AV_NOPTS_VALUE) {
1650  int64_t pts = pkt->pts - (is_relative(pkt->pts) ? RELATIVE_TS_BASE : 0);
1651  int64_t sample = ts_to_samples(st, pts);
1652  int duration = ts_to_samples(st, pkt->duration);
1653  int64_t end_sample = sample + duration;
1654  if (duration > 0 && end_sample >= st->internal->first_discard_sample &&
1655  sample < st->internal->last_discard_sample)
1656  discard_padding = FFMIN(end_sample - st->internal->first_discard_sample, duration);
1657  }
1658  if (st->internal->start_skip_samples && (pkt->pts == 0 || pkt->pts == RELATIVE_TS_BASE))
1660  if (st->internal->skip_samples || discard_padding) {
1662  if (p) {
1663  AV_WL32(p, st->internal->skip_samples);
1664  AV_WL32(p + 4, discard_padding);
1665  av_log(s, AV_LOG_DEBUG, "demuxer injecting skip %d / discard %d\n", st->internal->skip_samples, discard_padding);
1666  }
1667  st->internal->skip_samples = 0;
1668  }
1669 
1670  if (st->internal->inject_global_side_data) {
1671  for (i = 0; i < st->nb_side_data; i++) {
1672  AVPacketSideData *src_sd = &st->side_data[i];
1673  uint8_t *dst_data;
1674 
1675  if (av_packet_get_side_data(pkt, src_sd->type, NULL))
1676  continue;
1677 
1678  dst_data = av_packet_new_side_data(pkt, src_sd->type, src_sd->size);
1679  if (!dst_data) {
1680  av_log(s, AV_LOG_WARNING, "Could not inject global side data\n");
1681  continue;
1682  }
1683 
1684  memcpy(dst_data, src_sd->data, src_sd->size);
1685  }
1687  }
1688  }
1689 
1690  av_opt_get_dict_val(s, "metadata", AV_OPT_SEARCH_CHILDREN, &metadata);
1691  if (metadata) {
1693  av_dict_copy(&s->metadata, metadata, 0);
1694  av_dict_free(&metadata);
1696  }
1697 
1698 #if FF_API_LAVF_AVCTX
1700 #endif
1701 
1702  if (s->debug & FF_FDEBUG_TS)
1703  av_log(s, AV_LOG_DEBUG,
1704  "read_frame_internal stream=%d, pts=%s, dts=%s, "
1705  "size=%d, duration=%"PRId64", flags=%d\n",
1706  pkt->stream_index,
1707  av_ts2str(pkt->pts),
1708  av_ts2str(pkt->dts),
1709  pkt->size, pkt->duration, pkt->flags);
1710 
1711  /* A demuxer might have returned EOF because of an IO error, let's
1712  * propagate this back to the user. */
1713  if (ret == AVERROR_EOF && s->pb && s->pb->error < 0 && s->pb->error != AVERROR(EAGAIN))
1714  ret = s->pb->error;
1715 
1716  return ret;
1717 }
1718 
1720 {
1721  const int genpts = s->flags & AVFMT_FLAG_GENPTS;
1722  int eof = 0;
1723  int ret;
1724  AVStream *st;
1725 
1726  if (!genpts) {
1727  ret = s->internal->packet_buffer
1729  &s->internal->packet_buffer_end, pkt)
1730  : read_frame_internal(s, pkt);
1731  if (ret < 0)
1732  return ret;
1733  goto return_packet;
1734  }
1735 
1736  for (;;) {
1737  AVPacketList *pktl = s->internal->packet_buffer;
1738 
1739  if (pktl) {
1740  AVPacket *next_pkt = &pktl->pkt;
1741 
1742  if (next_pkt->dts != AV_NOPTS_VALUE) {
1743  int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1744  // last dts seen for this stream. if any of packets following
1745  // current one had no dts, we will set this to AV_NOPTS_VALUE.
1746  int64_t last_dts = next_pkt->dts;
1747  av_assert2(wrap_bits <= 64);
1748  while (pktl && next_pkt->pts == AV_NOPTS_VALUE) {
1749  if (pktl->pkt.stream_index == next_pkt->stream_index &&
1750  av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2ULL << (wrap_bits - 1)) < 0) {
1751  if (av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2ULL << (wrap_bits - 1))) {
1752  // not B-frame
1753  next_pkt->pts = pktl->pkt.dts;
1754  }
1755  if (last_dts != AV_NOPTS_VALUE) {
1756  // Once last dts was set to AV_NOPTS_VALUE, we don't change it.
1757  last_dts = pktl->pkt.dts;
1758  }
1759  }
1760  pktl = pktl->next;
1761  }
1762  if (eof && next_pkt->pts == AV_NOPTS_VALUE && last_dts != AV_NOPTS_VALUE) {
1763  // Fixing the last reference frame had none pts issue (For MXF etc).
1764  // We only do this when
1765  // 1. eof.
1766  // 2. we are not able to resolve a pts value for current packet.
1767  // 3. the packets for this stream at the end of the files had valid dts.
1768  next_pkt->pts = last_dts + next_pkt->duration;
1769  }
1770  pktl = s->internal->packet_buffer;
1771  }
1772 
1773  /* read packet from packet buffer, if there is data */
1774  st = s->streams[next_pkt->stream_index];
1775  if (!(next_pkt->pts == AV_NOPTS_VALUE && st->discard < AVDISCARD_ALL &&
1776  next_pkt->dts != AV_NOPTS_VALUE && !eof)) {
1778  &s->internal->packet_buffer_end, pkt);
1779  goto return_packet;
1780  }
1781  }
1782 
1783  ret = read_frame_internal(s, pkt);
1784  if (ret < 0) {
1785  if (pktl && ret != AVERROR(EAGAIN)) {
1786  eof = 1;
1787  continue;
1788  } else
1789  return ret;
1790  }
1791 
1794  pkt, NULL, 0);
1795  if (ret < 0) {
1796  av_packet_unref(pkt);
1797  return ret;
1798  }
1799  }
1800 
1801 return_packet:
1802 
1803  st = s->streams[pkt->stream_index];
1804  if ((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY) {
1805  ff_reduce_index(s, st->index);
1806  av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1807  }
1808 
1809  if (is_relative(pkt->dts))
1810  pkt->dts -= RELATIVE_TS_BASE;
1811  if (is_relative(pkt->pts))
1812  pkt->pts -= RELATIVE_TS_BASE;
1813 
1814  return ret;
1815 }
1816 
1817 /* XXX: suppress the packet queue */
1819 {
1820  if (!s->internal)
1821  return;
1825 
1827 }
1828 
1829 /*******************************************************/
1830 /* seek support */
1831 
1833 {
1834  int i;
1835  AVStream *st;
1836  int best_stream = 0;
1837  int best_score = INT_MIN;
1838 
1839  if (s->nb_streams <= 0)
1840  return -1;
1841  for (i = 0; i < s->nb_streams; i++) {
1842  int score = 0;
1843  st = s->streams[i];
1844  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1846  score -= 400;
1847  if (st->codecpar->width && st->codecpar->height)
1848  score += 50;
1849  score+= 25;
1850  }
1851  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
1852  if (st->codecpar->sample_rate)
1853  score += 50;
1854  }
1855  if (st->codec_info_nb_frames)
1856  score += 12;
1857 
1858  if (st->discard != AVDISCARD_ALL)
1859  score += 200;
1860 
1861  if (score > best_score) {
1862  best_score = score;
1863  best_stream = i;
1864  }
1865  }
1866  return best_stream;
1867 }
1868 
1869 /** Flush the frame reader. */
1871 {
1872  AVStream *st;
1873  int i, j;
1874 
1875  flush_packet_queue(s);
1876 
1877  /* Reset read state for each stream. */
1878  for (i = 0; i < s->nb_streams; i++) {
1879  st = s->streams[i];
1880 
1881  if (st->parser) {
1882  av_parser_close(st->parser);
1883  st->parser = NULL;
1884  }
1887  if (st->first_dts == AV_NOPTS_VALUE)
1888  st->cur_dts = RELATIVE_TS_BASE;
1889  else
1890  /* We set the current DTS to an unspecified origin. */
1891  st->cur_dts = AV_NOPTS_VALUE;
1892 
1894 
1895  for (j = 0; j < MAX_REORDER_DELAY + 1; j++)
1897 
1900 
1901  st->internal->skip_samples = 0;
1902  }
1903 }
1904 
1905 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
1906 {
1907  int i;
1908 
1909  for (i = 0; i < s->nb_streams; i++) {
1910  AVStream *st = s->streams[i];
1911 
1912  st->cur_dts =
1913  av_rescale(timestamp,
1914  st->time_base.den * (int64_t) ref_st->time_base.num,
1915  st->time_base.num * (int64_t) ref_st->time_base.den);
1916  }
1917 }
1918 
1919 void ff_reduce_index(AVFormatContext *s, int stream_index)
1920 {
1921  AVStream *st = s->streams[stream_index];
1922  unsigned int max_entries = s->max_index_size / sizeof(AVIndexEntry);
1923 
1924  if ((unsigned) st->internal->nb_index_entries >= max_entries) {
1925  int i;
1926  for (i = 0; 2 * i < st->internal->nb_index_entries; i++)
1927  st->internal->index_entries[i] = st->internal->index_entries[2 * i];
1928  st->internal->nb_index_entries = i;
1929  }
1930 }
1931 
1932 int ff_add_index_entry(AVIndexEntry **index_entries,
1933  int *nb_index_entries,
1934  unsigned int *index_entries_allocated_size,
1935  int64_t pos, int64_t timestamp,
1936  int size, int distance, int flags)
1937 {
1938  AVIndexEntry *entries, *ie;
1939  int index;
1940 
1941  if ((unsigned) *nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1942  return -1;
1943 
1944  if (timestamp == AV_NOPTS_VALUE)
1945  return AVERROR(EINVAL);
1946 
1947  if (size < 0 || size > 0x3FFFFFFF)
1948  return AVERROR(EINVAL);
1949 
1950  if (is_relative(timestamp)) //FIXME this maintains previous behavior but we should shift by the correct offset once known
1951  timestamp -= RELATIVE_TS_BASE;
1952 
1953  entries = av_fast_realloc(*index_entries,
1954  index_entries_allocated_size,
1955  (*nb_index_entries + 1) *
1956  sizeof(AVIndexEntry));
1957  if (!entries)
1958  return -1;
1959 
1960  *index_entries = entries;
1961 
1962  index = ff_index_search_timestamp(*index_entries, *nb_index_entries,
1963  timestamp, AVSEEK_FLAG_ANY);
1964 
1965  if (index < 0) {
1966  index = (*nb_index_entries)++;
1967  ie = &entries[index];
1968  av_assert0(index == 0 || ie[-1].timestamp < timestamp);
1969  } else {
1970  ie = &entries[index];
1971  if (ie->timestamp != timestamp) {
1972  if (ie->timestamp <= timestamp)
1973  return -1;
1974  memmove(entries + index + 1, entries + index,
1975  sizeof(AVIndexEntry) * (*nb_index_entries - index));
1976  (*nb_index_entries)++;
1977  } else if (ie->pos == pos && distance < ie->min_distance)
1978  // do not reduce the distance
1979  distance = ie->min_distance;
1980  }
1981 
1982  ie->pos = pos;
1983  ie->timestamp = timestamp;
1984  ie->min_distance = distance;
1985  ie->size = size;
1986  ie->flags = flags;
1987 
1988  return index;
1989 }
1990 
1991 int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp,
1992  int size, int distance, int flags)
1993 {
1994  timestamp = wrap_timestamp(st, timestamp);
1997  timestamp, size, distance, flags);
1998 }
1999 
2000 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
2001  int64_t wanted_timestamp, int flags)
2002 {
2003  int a, b, m;
2004  int64_t timestamp;
2005 
2006  a = -1;
2007  b = nb_entries;
2008 
2009  // Optimize appending index entries at the end.
2010  if (b && entries[b - 1].timestamp < wanted_timestamp)
2011  a = b - 1;
2012 
2013  while (b - a > 1) {
2014  m = (a + b) >> 1;
2015 
2016  // Search for the next non-discarded packet.
2017  while ((entries[m].flags & AVINDEX_DISCARD_FRAME) && m < b && m < nb_entries - 1) {
2018  m++;
2019  if (m == b && entries[m].timestamp >= wanted_timestamp) {
2020  m = b - 1;
2021  break;
2022  }
2023  }
2024 
2025  timestamp = entries[m].timestamp;
2026  if (timestamp >= wanted_timestamp)
2027  b = m;
2028  if (timestamp <= wanted_timestamp)
2029  a = m;
2030  }
2031  m = (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
2032 
2033  if (!(flags & AVSEEK_FLAG_ANY))
2034  while (m >= 0 && m < nb_entries &&
2035  !(entries[m].flags & AVINDEX_KEYFRAME))
2036  m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
2037 
2038  if (m == nb_entries)
2039  return -1;
2040  return m;
2041 }
2042 
2043 void ff_configure_buffers_for_index(AVFormatContext *s, int64_t time_tolerance)
2044 {
2045  int ist1, ist2;
2046  int64_t pos_delta = 0;
2047  int64_t skip = 0;
2048  //We could use URLProtocol flags here but as many user applications do not use URLProtocols this would be unreliable
2049  const char *proto = avio_find_protocol_name(s->url);
2050 
2051  av_assert0(time_tolerance >= 0);
2052 
2053  if (!proto) {
2054  av_log(s, AV_LOG_INFO,
2055  "Protocol name not provided, cannot determine if input is local or "
2056  "a network protocol, buffers and access patterns cannot be configured "
2057  "optimally without knowing the protocol\n");
2058  }
2059 
2060  if (proto && !(strcmp(proto, "file") && strcmp(proto, "pipe") && strcmp(proto, "cache")))
2061  return;
2062 
2063  for (ist1 = 0; ist1 < s->nb_streams; ist1++) {
2064  AVStream *st1 = s->streams[ist1];
2065  for (ist2 = 0; ist2 < s->nb_streams; ist2++) {
2066  AVStream *st2 = s->streams[ist2];
2067  int i1, i2;
2068 
2069  if (ist1 == ist2)
2070  continue;
2071 
2072  for (i1 = i2 = 0; i1 < st1->internal->nb_index_entries; i1++) {
2073  AVIndexEntry *e1 = &st1->internal->index_entries[i1];
2074  int64_t e1_pts = av_rescale_q(e1->timestamp, st1->time_base, AV_TIME_BASE_Q);
2075 
2076  skip = FFMAX(skip, e1->size);
2077  for (; i2 < st2->internal->nb_index_entries; i2++) {
2078  AVIndexEntry *e2 = &st2->internal->index_entries[i2];
2079  int64_t e2_pts = av_rescale_q(e2->timestamp, st2->time_base, AV_TIME_BASE_Q);
2080  if (e2_pts < e1_pts || e2_pts - (uint64_t)e1_pts < time_tolerance)
2081  continue;
2082  pos_delta = FFMAX(pos_delta, e1->pos - e2->pos);
2083  break;
2084  }
2085  }
2086  }
2087  }
2088 
2089  pos_delta *= 2;
2090  /* XXX This could be adjusted depending on protocol*/
2091  if (s->pb->buffer_size < pos_delta && pos_delta < (1<<24)) {
2092  av_log(s, AV_LOG_VERBOSE, "Reconfiguring buffers to size %"PRId64"\n", pos_delta);
2093 
2094  /* realloc the buffer and the original data will be retained */
2095  if (ffio_realloc_buf(s->pb, pos_delta)) {
2096  av_log(s, AV_LOG_ERROR, "Realloc buffer fail.\n");
2097  return;
2098  }
2099 
2100  s->pb->short_seek_threshold = FFMAX(s->pb->short_seek_threshold, pos_delta/2);
2101  }
2102 
2103  if (skip < (1<<23)) {
2105  }
2106 }
2107 
2108 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp, int flags)
2109 {
2111  wanted_timestamp, flags);
2112 }
2113 
2114 static int64_t ff_read_timestamp(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit,
2115  int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
2116 {
2117  int64_t ts = read_timestamp(s, stream_index, ppos, pos_limit);
2118  if (stream_index >= 0)
2119  ts = wrap_timestamp(s->streams[stream_index], ts);
2120  return ts;
2121 }
2122 
2123 int ff_seek_frame_binary(AVFormatContext *s, int stream_index,
2124  int64_t target_ts, int flags)
2125 {
2126  const AVInputFormat *avif = s->iformat;
2127  int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
2128  int64_t ts_min, ts_max, ts;
2129  int index;
2130  int64_t ret;
2131  AVStream *st;
2132 
2133  if (stream_index < 0)
2134  return -1;
2135 
2136  av_log(s, AV_LOG_TRACE, "read_seek: %d %s\n", stream_index, av_ts2str(target_ts));
2137 
2138  ts_max =
2139  ts_min = AV_NOPTS_VALUE;
2140  pos_limit = -1; // GCC falsely says it may be uninitialized.
2141 
2142  st = s->streams[stream_index];
2143  if (st->internal->index_entries) {
2144  AVIndexEntry *e;
2145 
2146  /* FIXME: Whole function must be checked for non-keyframe entries in
2147  * index case, especially read_timestamp(). */
2148  index = av_index_search_timestamp(st, target_ts,
2149  flags | AVSEEK_FLAG_BACKWARD);
2150  index = FFMAX(index, 0);
2151  e = &st->internal->index_entries[index];
2152 
2153  if (e->timestamp <= target_ts || e->pos == e->min_distance) {
2154  pos_min = e->pos;
2155  ts_min = e->timestamp;
2156  av_log(s, AV_LOG_TRACE, "using cached pos_min=0x%"PRIx64" dts_min=%s\n",
2157  pos_min, av_ts2str(ts_min));
2158  } else {
2159  av_assert1(index == 0);
2160  }
2161 
2162  index = av_index_search_timestamp(st, target_ts,
2163  flags & ~AVSEEK_FLAG_BACKWARD);
2164  av_assert0(index < st->internal->nb_index_entries);
2165  if (index >= 0) {
2166  e = &st->internal->index_entries[index];
2167  av_assert1(e->timestamp >= target_ts);
2168  pos_max = e->pos;
2169  ts_max = e->timestamp;
2170  pos_limit = pos_max - e->min_distance;
2171  av_log(s, AV_LOG_TRACE, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64
2172  " dts_max=%s\n", pos_max, pos_limit, av_ts2str(ts_max));
2173  }
2174  }
2175 
2176  pos = ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit,
2177  ts_min, ts_max, flags, &ts, avif->read_timestamp);
2178  if (pos < 0)
2179  return -1;
2180 
2181  /* do the seek */
2182  if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
2183  return ret;
2184 
2186  ff_update_cur_dts(s, st, ts);
2187 
2188  return 0;
2189 }
2190 
2191 int ff_find_last_ts(AVFormatContext *s, int stream_index, int64_t *ts, int64_t *pos,
2192  int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
2193 {
2194  int64_t step = 1024;
2195  int64_t limit, ts_max;
2196  int64_t filesize = avio_size(s->pb);
2197  int64_t pos_max = filesize - 1;
2198  do {
2199  limit = pos_max;
2200  pos_max = FFMAX(0, (pos_max) - step);
2201  ts_max = ff_read_timestamp(s, stream_index,
2202  &pos_max, limit, read_timestamp);
2203  step += step;
2204  } while (ts_max == AV_NOPTS_VALUE && 2*limit > step);
2205  if (ts_max == AV_NOPTS_VALUE)
2206  return -1;
2207 
2208  for (;;) {
2209  int64_t tmp_pos = pos_max + 1;
2210  int64_t tmp_ts = ff_read_timestamp(s, stream_index,
2211  &tmp_pos, INT64_MAX, read_timestamp);
2212  if (tmp_ts == AV_NOPTS_VALUE)
2213  break;
2214  av_assert0(tmp_pos > pos_max);
2215  ts_max = tmp_ts;
2216  pos_max = tmp_pos;
2217  if (tmp_pos >= filesize)
2218  break;
2219  }
2220 
2221  if (ts)
2222  *ts = ts_max;
2223  if (pos)
2224  *pos = pos_max;
2225 
2226  return 0;
2227 }
2228 
2229 int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
2230  int64_t pos_min, int64_t pos_max, int64_t pos_limit,
2231  int64_t ts_min, int64_t ts_max,
2232  int flags, int64_t *ts_ret,
2233  int64_t (*read_timestamp)(struct AVFormatContext *, int,
2234  int64_t *, int64_t))
2235 {
2236  int64_t pos, ts;
2237  int64_t start_pos;
2238  int no_change;
2239  int ret;
2240 
2241  av_log(s, AV_LOG_TRACE, "gen_seek: %d %s\n", stream_index, av_ts2str(target_ts));
2242 
2243  if (ts_min == AV_NOPTS_VALUE) {
2244  pos_min = s->internal->data_offset;
2245  ts_min = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
2246  if (ts_min == AV_NOPTS_VALUE)
2247  return -1;
2248  }
2249 
2250  if (ts_min >= target_ts) {
2251  *ts_ret = ts_min;
2252  return pos_min;
2253  }
2254 
2255  if (ts_max == AV_NOPTS_VALUE) {
2256  if ((ret = ff_find_last_ts(s, stream_index, &ts_max, &pos_max, read_timestamp)) < 0)
2257  return ret;
2258  pos_limit = pos_max;
2259  }
2260 
2261  if (ts_max <= target_ts) {
2262  *ts_ret = ts_max;
2263  return pos_max;
2264  }
2265 
2266  av_assert0(ts_min < ts_max);
2267 
2268  no_change = 0;
2269  while (pos_min < pos_limit) {
2270  av_log(s, AV_LOG_TRACE,
2271  "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%s dts_max=%s\n",
2272  pos_min, pos_max, av_ts2str(ts_min), av_ts2str(ts_max));
2273  av_assert0(pos_limit <= pos_max);
2274 
2275  if (no_change == 0) {
2276  int64_t approximate_keyframe_distance = pos_max - pos_limit;
2277  // interpolate position (better than dichotomy)
2278  pos = av_rescale(target_ts - ts_min, pos_max - pos_min,
2279  ts_max - ts_min) +
2280  pos_min - approximate_keyframe_distance;
2281  } else if (no_change == 1) {
2282  // bisection if interpolation did not change min / max pos last time
2283  pos = (pos_min + pos_limit) >> 1;
2284  } else {
2285  /* linear search if bisection failed, can only happen if there
2286  * are very few or no keyframes between min/max */
2287  pos = pos_min;
2288  }
2289  if (pos <= pos_min)
2290  pos = pos_min + 1;
2291  else if (pos > pos_limit)
2292  pos = pos_limit;
2293  start_pos = pos;
2294 
2295  // May pass pos_limit instead of -1.
2296  ts = ff_read_timestamp(s, stream_index, &pos, INT64_MAX, read_timestamp);
2297  if (pos == pos_max)
2298  no_change++;
2299  else
2300  no_change = 0;
2301  av_log(s, AV_LOG_TRACE, "%"PRId64" %"PRId64" %"PRId64" / %s %s %s"
2302  " target:%s limit:%"PRId64" start:%"PRId64" noc:%d\n",
2303  pos_min, pos, pos_max,
2304  av_ts2str(ts_min), av_ts2str(ts), av_ts2str(ts_max), av_ts2str(target_ts),
2305  pos_limit, start_pos, no_change);
2306  if (ts == AV_NOPTS_VALUE) {
2307  av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
2308  return -1;
2309  }
2310  if (target_ts <= ts) {
2311  pos_limit = start_pos - 1;
2312  pos_max = pos;
2313  ts_max = ts;
2314  }
2315  if (target_ts >= ts) {
2316  pos_min = pos;
2317  ts_min = ts;
2318  }
2319  }
2320 
2321  pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
2322  ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
2323 #if 0
2324  pos_min = pos;
2325  ts_min = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
2326  pos_min++;
2327  ts_max = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
2328  av_log(s, AV_LOG_TRACE, "pos=0x%"PRIx64" %s<=%s<=%s\n",
2329  pos, av_ts2str(ts_min), av_ts2str(target_ts), av_ts2str(ts_max));
2330 #endif
2331  *ts_ret = ts;
2332  return pos;
2333 }
2334 
2335 static int seek_frame_byte(AVFormatContext *s, int stream_index,
2336  int64_t pos, int flags)
2337 {
2338  int64_t pos_min, pos_max;
2339 
2340  pos_min = s->internal->data_offset;
2341  pos_max = avio_size(s->pb) - 1;
2342 
2343  if (pos < pos_min)
2344  pos = pos_min;
2345  else if (pos > pos_max)
2346  pos = pos_max;
2347 
2348  avio_seek(s->pb, pos, SEEK_SET);
2349 
2350  s->io_repositioned = 1;
2351 
2352  return 0;
2353 }
2354 
2355 static int seek_frame_generic(AVFormatContext *s, int stream_index,
2356  int64_t timestamp, int flags)
2357 {
2358  int index;
2359  int64_t ret;
2360  AVStream *st;
2361  AVIndexEntry *ie;
2362 
2363  st = s->streams[stream_index];
2364 
2365  index = av_index_search_timestamp(st, timestamp, flags);
2366 
2367  if (index < 0 && st->internal->nb_index_entries &&
2368  timestamp < st->internal->index_entries[0].timestamp)
2369  return -1;
2370 
2371  if (index < 0 || index == st->internal->nb_index_entries - 1) {
2372  AVPacket pkt;
2373  int nonkey = 0;
2374 
2375  if (st->internal->nb_index_entries) {
2377  ie = &st->internal->index_entries[st->internal->nb_index_entries - 1];
2378  if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
2379  return ret;
2380  ff_update_cur_dts(s, st, ie->timestamp);
2381  } else {
2382  if ((ret = avio_seek(s->pb, s->internal->data_offset, SEEK_SET)) < 0)
2383  return ret;
2384  }
2385  for (;;) {
2386  int read_status;
2387  do {
2388  read_status = av_read_frame(s, &pkt);
2389  } while (read_status == AVERROR(EAGAIN));
2390  if (read_status < 0)
2391  break;
2392  if (stream_index == pkt.stream_index && pkt.dts > timestamp) {
2393  if (pkt.flags & AV_PKT_FLAG_KEY) {
2394  av_packet_unref(&pkt);
2395  break;
2396  }
2397  if (nonkey++ > 1000 && st->codecpar->codec_id != AV_CODEC_ID_CDGRAPHICS) {
2398  av_log(s, AV_LOG_ERROR,"seek_frame_generic failed as this stream seems to contain no keyframes after the target timestamp, %d non keyframes found\n", nonkey);
2399  av_packet_unref(&pkt);
2400  break;
2401  }
2402  }
2403  av_packet_unref(&pkt);
2404  }
2405  index = av_index_search_timestamp(st, timestamp, flags);
2406  }
2407  if (index < 0)
2408  return -1;
2409 
2411  if (s->iformat->read_seek)
2412  if (s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
2413  return 0;
2414  ie = &st->internal->index_entries[index];
2415  if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
2416  return ret;
2417  ff_update_cur_dts(s, st, ie->timestamp);
2418 
2419  return 0;
2420 }
2421 
2422 static int seek_frame_internal(AVFormatContext *s, int stream_index,
2423  int64_t timestamp, int flags)
2424 {
2425  int ret;
2426  AVStream *st;
2427 
2428  if (flags & AVSEEK_FLAG_BYTE) {
2429  if (s->iformat->flags & AVFMT_NO_BYTE_SEEK)
2430  return -1;
2432  return seek_frame_byte(s, stream_index, timestamp, flags);
2433  }
2434 
2435  if (stream_index < 0) {
2436  stream_index = av_find_default_stream_index(s);
2437  if (stream_index < 0)
2438  return -1;
2439 
2440  st = s->streams[stream_index];
2441  /* timestamp for default must be expressed in AV_TIME_BASE units */
2442  timestamp = av_rescale(timestamp, st->time_base.den,
2443  AV_TIME_BASE * (int64_t) st->time_base.num);
2444  }
2445 
2446  /* first, we try the format specific seek */
2447  if (s->iformat->read_seek) {
2449  ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
2450  } else
2451  ret = -1;
2452  if (ret >= 0)
2453  return 0;
2454 
2455  if (s->iformat->read_timestamp &&
2456  !(s->iformat->flags & AVFMT_NOBINSEARCH)) {
2458  return ff_seek_frame_binary(s, stream_index, timestamp, flags);
2459  } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) {
2461  return seek_frame_generic(s, stream_index, timestamp, flags);
2462  } else
2463  return -1;
2464 }
2465 
2466 int av_seek_frame(AVFormatContext *s, int stream_index,
2467  int64_t timestamp, int flags)
2468 {
2469  int ret;
2470 
2471  if (s->iformat->read_seek2 && !s->iformat->read_seek) {
2472  int64_t min_ts = INT64_MIN, max_ts = INT64_MAX;
2473  if ((flags & AVSEEK_FLAG_BACKWARD))
2474  max_ts = timestamp;
2475  else
2476  min_ts = timestamp;
2477  return avformat_seek_file(s, stream_index, min_ts, timestamp, max_ts,
2478  flags & ~AVSEEK_FLAG_BACKWARD);
2479  }
2480 
2481  ret = seek_frame_internal(s, stream_index, timestamp, flags);
2482 
2483  if (ret >= 0)
2485 
2486  return ret;
2487 }
2488 
2489 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts,
2490  int64_t ts, int64_t max_ts, int flags)
2491 {
2492  if (min_ts > ts || max_ts < ts)
2493  return -1;
2494  if (stream_index < -1 || stream_index >= (int)s->nb_streams)
2495  return AVERROR(EINVAL);
2496 
2497  if (s->seek2any>0)
2498  flags |= AVSEEK_FLAG_ANY;
2499  flags &= ~AVSEEK_FLAG_BACKWARD;
2500 
2501  if (s->iformat->read_seek2) {
2502  int ret;
2504 
2505  if (stream_index == -1 && s->nb_streams == 1) {
2506  AVRational time_base = s->streams[0]->time_base;
2507  ts = av_rescale_q(ts, AV_TIME_BASE_Q, time_base);
2508  min_ts = av_rescale_rnd(min_ts, time_base.den,
2509  time_base.num * (int64_t)AV_TIME_BASE,
2511  max_ts = av_rescale_rnd(max_ts, time_base.den,
2512  time_base.num * (int64_t)AV_TIME_BASE,
2514  stream_index = 0;
2515  }
2516 
2517  ret = s->iformat->read_seek2(s, stream_index, min_ts,
2518  ts, max_ts, flags);
2519 
2520  if (ret >= 0)
2522  return ret;
2523  }
2524 
2525  if (s->iformat->read_timestamp) {
2526  // try to seek via read_timestamp()
2527  }
2528 
2529  // Fall back on old API if new is not implemented but old is.
2530  // Note the old API has somewhat different semantics.
2531  if (s->iformat->read_seek || 1) {
2532  int dir = (ts - (uint64_t)min_ts > (uint64_t)max_ts - ts ? AVSEEK_FLAG_BACKWARD : 0);
2533  int ret = av_seek_frame(s, stream_index, ts, flags | dir);
2534  if (ret<0 && ts != min_ts && max_ts != ts) {
2535  ret = av_seek_frame(s, stream_index, dir ? max_ts : min_ts, flags | dir);
2536  if (ret >= 0)
2537  ret = av_seek_frame(s, stream_index, ts, flags | (dir^AVSEEK_FLAG_BACKWARD));
2538  }
2539  return ret;
2540  }
2541 
2542  // try some generic seek like seek_frame_generic() but with new ts semantics
2543  return -1; //unreachable
2544 }
2545 
2547 {
2549  return 0;
2550 }
2551 
2552 /*******************************************************/
2553 
2554 /**
2555  * Return TRUE if the stream has accurate duration in any stream.
2556  *
2557  * @return TRUE if the stream has accurate duration for at least one component.
2558  */
2560 {
2561  int i;
2562  AVStream *st;
2563 
2564  for (i = 0; i < ic->nb_streams; i++) {
2565  st = ic->streams[i];
2566  if (st->duration != AV_NOPTS_VALUE)
2567  return 1;
2568  }
2569  if (ic->duration != AV_NOPTS_VALUE)
2570  return 1;
2571  return 0;
2572 }
2573 
2574 /**
2575  * Estimate the stream timings from the one of each components.
2576  *
2577  * Also computes the global bitrate if possible.
2578  */
2580 {
2581  int64_t start_time, start_time1, start_time_text, end_time, end_time1, end_time_text;
2582  int64_t duration, duration1, duration_text, filesize;
2583  int i;
2584  AVProgram *p;
2585 
2586  start_time = INT64_MAX;
2587  start_time_text = INT64_MAX;
2588  end_time = INT64_MIN;
2589  end_time_text = INT64_MIN;
2590  duration = INT64_MIN;
2591  duration_text = INT64_MIN;
2592 
2593  for (i = 0; i < ic->nb_streams; i++) {
2594  AVStream *st = ic->streams[i];
2595  int is_text = st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE ||
2597  if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
2598  start_time1 = av_rescale_q(st->start_time, st->time_base,
2599  AV_TIME_BASE_Q);
2600  if (is_text)
2601  start_time_text = FFMIN(start_time_text, start_time1);
2602  else
2603  start_time = FFMIN(start_time, start_time1);
2604  end_time1 = av_rescale_q_rnd(st->duration, st->time_base,
2607  if (end_time1 != AV_NOPTS_VALUE && (end_time1 > 0 ? start_time1 <= INT64_MAX - end_time1 : start_time1 >= INT64_MIN - end_time1)) {
2608  end_time1 += start_time1;
2609  if (is_text)
2610  end_time_text = FFMAX(end_time_text, end_time1);
2611  else
2612  end_time = FFMAX(end_time, end_time1);
2613  }
2614  for (p = NULL; (p = av_find_program_from_stream(ic, p, i)); ) {
2615  if (p->start_time == AV_NOPTS_VALUE || p->start_time > start_time1)
2616  p->start_time = start_time1;
2617  if (p->end_time < end_time1)
2618  p->end_time = end_time1;
2619  }
2620  }
2621  if (st->duration != AV_NOPTS_VALUE) {
2622  duration1 = av_rescale_q(st->duration, st->time_base,
2623  AV_TIME_BASE_Q);
2624  if (is_text)
2625  duration_text = FFMAX(duration_text, duration1);
2626  else
2627  duration = FFMAX(duration, duration1);
2628  }
2629  }
2630  if (start_time == INT64_MAX || (start_time > start_time_text && start_time - (uint64_t)start_time_text < AV_TIME_BASE))
2631  start_time = start_time_text;
2632  else if (start_time > start_time_text)
2633  av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream starttime %f\n", start_time_text / (float)AV_TIME_BASE);
2634 
2635  if (end_time == INT64_MIN || (end_time < end_time_text && end_time_text - (uint64_t)end_time < AV_TIME_BASE))
2636  end_time = end_time_text;
2637  else if (end_time < end_time_text)
2638  av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream endtime %f\n", end_time_text / (float)AV_TIME_BASE);
2639 
2640  if (duration == INT64_MIN || (duration < duration_text && duration_text - duration < AV_TIME_BASE))
2641  duration = duration_text;
2642  else if (duration < duration_text)
2643  av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream duration %f\n", duration_text / (float)AV_TIME_BASE);
2644 
2645  if (start_time != INT64_MAX) {
2646  ic->start_time = start_time;
2647  if (end_time != INT64_MIN) {
2648  if (ic->nb_programs > 1) {
2649  for (i = 0; i < ic->nb_programs; i++) {
2650  p = ic->programs[i];
2651  if (p->start_time != AV_NOPTS_VALUE &&
2652  p->end_time > p->start_time &&
2653  p->end_time - (uint64_t)p->start_time <= INT64_MAX)
2654  duration = FFMAX(duration, p->end_time - p->start_time);
2655  }
2656  } else if (end_time >= start_time && end_time - (uint64_t)start_time <= INT64_MAX) {
2657  duration = FFMAX(duration, end_time - start_time);
2658  }
2659  }
2660  }
2661  if (duration != INT64_MIN && duration > 0 && ic->duration == AV_NOPTS_VALUE) {
2662  ic->duration = duration;
2663  }
2664  if (ic->pb && (filesize = avio_size(ic->pb)) > 0 && ic->duration > 0) {
2665  /* compute the bitrate */
2666  double bitrate = (double) filesize * 8.0 * AV_TIME_BASE /
2667  (double) ic->duration;
2668  if (bitrate >= 0 && bitrate <= INT64_MAX)
2669  ic->bit_rate = bitrate;
2670  }
2671 }
2672 
2674 {
2675  int i;
2676  AVStream *st;
2677 
2679  for (i = 0; i < ic->nb_streams; i++) {
2680  st = ic->streams[i];
2681  if (st->start_time == AV_NOPTS_VALUE) {
2682  if (ic->start_time != AV_NOPTS_VALUE)
2684  st->time_base);
2685  if (ic->duration != AV_NOPTS_VALUE)
2687  st->time_base);
2688  }
2689  }
2690 }
2691 
2693 {
2694  int64_t filesize, duration;
2695  int i, show_warning = 0;
2696  AVStream *st;
2697 
2698  /* if bit_rate is already set, we believe it */
2699  if (ic->bit_rate <= 0) {
2700  int64_t bit_rate = 0;
2701  for (i = 0; i < ic->nb_streams; i++) {
2702  st = ic->streams[i];
2703  if (st->codecpar->bit_rate <= 0 && st->internal->avctx->bit_rate > 0)
2704  st->codecpar->bit_rate = st->internal->avctx->bit_rate;
2705  if (st->codecpar->bit_rate > 0) {
2706  if (INT64_MAX - st->codecpar->bit_rate < bit_rate) {
2707  bit_rate = 0;
2708  break;
2709  }
2710  bit_rate += st->codecpar->bit_rate;
2711  } else if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && st->codec_info_nb_frames > 1) {
2712  // If we have a videostream with packets but without a bitrate
2713  // then consider the sum not known
2714  bit_rate = 0;
2715  break;
2716  }
2717  }
2718  ic->bit_rate = bit_rate;
2719  }
2720 
2721  /* if duration is already set, we believe it */
2722  if (ic->duration == AV_NOPTS_VALUE &&
2723  ic->bit_rate != 0) {
2724  filesize = ic->pb ? avio_size(ic->pb) : 0;
2725  if (filesize > ic->internal->data_offset) {
2726  filesize -= ic->internal->data_offset;
2727  for (i = 0; i < ic->nb_streams; i++) {
2728  st = ic->streams[i];
2729  if ( st->time_base.num <= INT64_MAX / ic->bit_rate
2730  && st->duration == AV_NOPTS_VALUE) {
2731  duration = av_rescale(filesize, 8LL * st->time_base.den,
2732  ic->bit_rate *
2733  (int64_t) st->time_base.num);
2734  st->duration = duration;
2735  show_warning = 1;
2736  }
2737  }
2738  }
2739  }
2740  if (show_warning)
2741  av_log(ic, AV_LOG_WARNING,
2742  "Estimating duration from bitrate, this may be inaccurate\n");
2743 }
2744 
2745 #define DURATION_MAX_READ_SIZE 250000LL
2746 #define DURATION_MAX_RETRY 6
2747 
2748 /* only usable for MPEG-PS streams */
2749 static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
2750 {
2751  AVPacket pkt1, *pkt = &pkt1;
2752  AVStream *st;
2753  int num, den, read_size, i, ret;
2754  int found_duration = 0;
2755  int is_end;
2756  int64_t filesize, offset, duration;
2757  int retry = 0;
2758 
2759  /* flush packet queue */
2760  flush_packet_queue(ic);
2761 
2762  for (i = 0; i < ic->nb_streams; i++) {
2763  st = ic->streams[i];
2764  if (st->start_time == AV_NOPTS_VALUE &&
2765  st->first_dts == AV_NOPTS_VALUE &&
2767  av_log(ic, AV_LOG_WARNING,
2768  "start time for stream %d is not set in estimate_timings_from_pts\n", i);
2769 
2770  if (st->parser) {
2771  av_parser_close(st->parser);
2772  st->parser = NULL;
2773  }
2774  }
2775 
2777  av_log(ic, AV_LOG_INFO, "Skipping duration calculation in estimate_timings_from_pts\n");
2778  goto skip_duration_calc;
2779  }
2780 
2781  av_opt_set(ic, "skip_changes", "1", AV_OPT_SEARCH_CHILDREN);
2782  /* estimate the end time (duration) */
2783  /* XXX: may need to support wrapping */
2784  filesize = ic->pb ? avio_size(ic->pb) : 0;
2785  do {
2786  is_end = found_duration;
2787  offset = filesize - (DURATION_MAX_READ_SIZE << retry);
2788  if (offset < 0)
2789  offset = 0;
2790 
2791  avio_seek(ic->pb, offset, SEEK_SET);
2792  read_size = 0;
2793  for (;;) {
2794  if (read_size >= DURATION_MAX_READ_SIZE << (FFMAX(retry - 1, 0)))
2795  break;
2796 
2797  do {
2798  ret = ff_read_packet(ic, pkt);
2799  } while (ret == AVERROR(EAGAIN));
2800  if (ret != 0)
2801  break;
2802  read_size += pkt->size;
2803  st = ic->streams[pkt->stream_index];
2804  if (pkt->pts != AV_NOPTS_VALUE &&
2805  (st->start_time != AV_NOPTS_VALUE ||
2806  st->first_dts != AV_NOPTS_VALUE)) {
2807  if (pkt->duration == 0) {
2808  ff_compute_frame_duration(ic, &num, &den, st, st->parser, pkt);
2809  if (den && num) {
2810  pkt->duration = av_rescale_rnd(1,
2811  num * (int64_t) st->time_base.den,
2812  den * (int64_t) st->time_base.num,
2813  AV_ROUND_DOWN);
2814  }
2815  }
2816  duration = pkt->pts + pkt->duration;
2817  found_duration = 1;
2818  if (st->start_time != AV_NOPTS_VALUE)
2819  duration -= st->start_time;
2820  else
2821  duration -= st->first_dts;
2822  if (duration > 0) {
2823  if (st->duration == AV_NOPTS_VALUE || st->internal->info->last_duration<= 0 ||
2824  (st->duration < duration && FFABS(duration - st->internal->info->last_duration) < 60LL*st->time_base.den / st->time_base.num))
2825  st->duration = duration;
2827  }
2828  }
2829  av_packet_unref(pkt);
2830  }
2831 
2832  /* check if all audio/video streams have valid duration */
2833  if (!is_end) {
2834  is_end = 1;
2835  for (i = 0; i < ic->nb_streams; i++) {
2836  st = ic->streams[i];
2837  switch (st->codecpar->codec_type) {
2838  case AVMEDIA_TYPE_VIDEO:
2839  case AVMEDIA_TYPE_AUDIO:
2840  if (st->duration == AV_NOPTS_VALUE)
2841  is_end = 0;
2842  }
2843  }
2844  }
2845  } while (!is_end &&
2846  offset &&
2847  ++retry <= DURATION_MAX_RETRY);
2848 
2849  av_opt_set(ic, "skip_changes", "0", AV_OPT_SEARCH_CHILDREN);
2850 
2851  /* warn about audio/video streams which duration could not be estimated */
2852  for (i = 0; i < ic->nb_streams; i++) {
2853  st = ic->streams[i];
2854  if (st->duration == AV_NOPTS_VALUE) {
2855  switch (st->codecpar->codec_type) {
2856  case AVMEDIA_TYPE_VIDEO:
2857  case AVMEDIA_TYPE_AUDIO:
2858  if (st->start_time != AV_NOPTS_VALUE || st->first_dts != AV_NOPTS_VALUE) {
2859  av_log(ic, AV_LOG_WARNING, "stream %d : no PTS found at end of file, duration not set\n", i);
2860  } else
2861  av_log(ic, AV_LOG_WARNING, "stream %d : no TS found at start of file, duration not set\n", i);
2862  }
2863  }
2864  }
2865 skip_duration_calc:
2867 
2868  avio_seek(ic->pb, old_offset, SEEK_SET);
2869  for (i = 0; i < ic->nb_streams; i++) {
2870  int j;
2871 
2872  st = ic->streams[i];
2873  st->cur_dts = st->first_dts;
2876  for (j = 0; j < MAX_REORDER_DELAY + 1; j++)
2878  }
2879 }
2880 
2881 /* 1:1 map to AVDurationEstimationMethod */
2882 static const char *const duration_name[] = {
2883  [AVFMT_DURATION_FROM_PTS] = "pts",
2884  [AVFMT_DURATION_FROM_STREAM] = "stream",
2885  [AVFMT_DURATION_FROM_BITRATE] = "bit rate",
2886 };
2887 
2889 {
2890  return duration_name[method];
2891 }
2892 
2893 static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
2894 {
2895  int64_t file_size;
2896 
2897  /* get the file size, if possible */
2898  if (ic->iformat->flags & AVFMT_NOFILE) {
2899  file_size = 0;
2900  } else {
2901  file_size = avio_size(ic->pb);
2902  file_size = FFMAX(0, file_size);
2903  }
2904 
2905  if ((!strcmp(ic->iformat->name, "mpeg") ||
2906  !strcmp(ic->iformat->name, "mpegts")) &&
2907  file_size && (ic->pb->seekable & AVIO_SEEKABLE_NORMAL)) {
2908  /* get accurate estimate from the PTSes */
2909  estimate_timings_from_pts(ic, old_offset);
2911  } else if (has_duration(ic)) {
2912  /* at least one component has timings - we use them for all
2913  * the components */
2915  /* nut demuxer estimate the duration from PTS */
2916  if(!strcmp(ic->iformat->name, "nut"))
2918  else
2920  } else {
2921  /* less precise: use bitrate info */
2924  }
2926 
2927  {
2928  int i;
2929  AVStream av_unused *st;
2930  for (i = 0; i < ic->nb_streams; i++) {
2931  st = ic->streams[i];
2932  if (st->time_base.den)
2933  av_log(ic, AV_LOG_TRACE, "stream %d: start_time: %s duration: %s\n", i,
2934  av_ts2timestr(st->start_time, &st->time_base),
2935  av_ts2timestr(st->duration, &st->time_base));
2936  }
2937  av_log(ic, AV_LOG_TRACE,
2938  "format: start_time: %s duration: %s (estimate from %s) bitrate=%"PRId64" kb/s\n",
2942  (int64_t)ic->bit_rate / 1000);
2943  }
2944 }
2945 
2946 static int has_codec_parameters(AVStream *st, const char **errmsg_ptr)
2947 {
2948  AVCodecContext *avctx = st->internal->avctx;
2949 
2950 #define FAIL(errmsg) do { \
2951  if (errmsg_ptr) \
2952  *errmsg_ptr = errmsg; \
2953  return 0; \
2954  } while (0)
2955 
2956  if ( avctx->codec_id == AV_CODEC_ID_NONE
2957  && avctx->codec_type != AVMEDIA_TYPE_DATA)
2958  FAIL("unknown codec");
2959  switch (avctx->codec_type) {
2960  case AVMEDIA_TYPE_AUDIO:
2961  if (!avctx->frame_size && determinable_frame_size(avctx))
2962  FAIL("unspecified frame size");
2963  if (st->internal->info->found_decoder >= 0 &&
2964  avctx->sample_fmt == AV_SAMPLE_FMT_NONE)
2965  FAIL("unspecified sample format");
2966  if (!avctx->sample_rate)
2967  FAIL("unspecified sample rate");
2968  if (!avctx->channels)
2969  FAIL("unspecified number of channels");
2970  if (st->internal->info->found_decoder >= 0 && !st->internal->nb_decoded_frames && avctx->codec_id == AV_CODEC_ID_DTS)
2971  FAIL("no decodable DTS frames");
2972  break;
2973  case AVMEDIA_TYPE_VIDEO:
2974  if (!avctx->width)
2975  FAIL("unspecified size");
2976  if (st->internal->info->found_decoder >= 0 && avctx->pix_fmt == AV_PIX_FMT_NONE)
2977  FAIL("unspecified pixel format");
2980  FAIL("no frame in rv30/40 and no sar");
2981  break;
2982  case AVMEDIA_TYPE_SUBTITLE:
2983  if (avctx->codec_id == AV_CODEC_ID_HDMV_PGS_SUBTITLE && !avctx->width)
2984  FAIL("unspecified size");
2985  break;
2986  case AVMEDIA_TYPE_DATA:
2987  if (avctx->codec_id == AV_CODEC_ID_NONE) return 1;
2988  }
2989 
2990  return 1;
2991 }
2992 
2993 /* returns 1 or 0 if or if not decoded data was returned, or a negative error */
2995  const AVPacket *avpkt, AVDictionary **options)
2996 {
2997  AVCodecContext *avctx = st->internal->avctx;
2998  const AVCodec *codec;
2999  int got_picture = 1, ret = 0;
3001  AVSubtitle subtitle;
3002  AVPacket pkt = *avpkt;
3003  int do_skip_frame = 0;
3004  enum AVDiscard skip_frame;
3005 
3006  if (!frame)
3007  return AVERROR(ENOMEM);
3008 
3009  if (!avcodec_is_open(avctx) &&
3010  st->internal->info->found_decoder <= 0 &&
3011  (st->codecpar->codec_id != -st->internal->info->found_decoder || !st->codecpar->codec_id)) {
3012  AVDictionary *thread_opt = NULL;
3013 
3014  codec = find_probe_decoder(s, st, st->codecpar->codec_id);
3015 
3016  if (!codec) {
3018  ret = -1;
3019  goto fail;
3020  }
3021 
3022  /* Force thread count to 1 since the H.264 decoder will not extract
3023  * SPS and PPS to extradata during multi-threaded decoding. */
3024  av_dict_set(options ? options : &thread_opt, "threads", "1", 0);
3025  /* Force lowres to 0. The decoder might reduce the video size by the
3026  * lowres factor, and we don't want that propagated to the stream's
3027  * codecpar */
3028  av_dict_set(options ? options : &thread_opt, "lowres", "0", 0);
3029  if (s->codec_whitelist)
3030  av_dict_set(options ? options : &thread_opt, "codec_whitelist", s->codec_whitelist, 0);
3031  ret = avcodec_open2(avctx, codec, options ? options : &thread_opt);
3032  if (!options)
3033  av_dict_free(&thread_opt);
3034  if (ret < 0) {
3035  st->internal->info->found_decoder = -avctx->codec_id;
3036  goto fail;
3037  }
3038  st->internal->info->found_decoder = 1;
3039  } else if (!st->internal->info->found_decoder)
3040  st->internal->info->found_decoder = 1;
3041 
3042  if (st->internal->info->found_decoder < 0) {
3043  ret = -1;
3044  goto fail;
3045  }
3046 
3048  do_skip_frame = 1;
3049  skip_frame = avctx->skip_frame;
3050  avctx->skip_frame = AVDISCARD_ALL;
3051  }
3052 
3053  while ((pkt.size > 0 || (!pkt.data && got_picture)) &&
3054  ret >= 0 &&
3056  (!st->codec_info_nb_frames &&
3058  got_picture = 0;
3059  if (avctx->codec_type == AVMEDIA_TYPE_VIDEO ||
3060  avctx->codec_type == AVMEDIA_TYPE_AUDIO) {
3061  ret = avcodec_send_packet(avctx, &pkt);
3062  if (ret < 0 && ret != AVERROR(EAGAIN) && ret != AVERROR_EOF)
3063  break;
3064  if (ret >= 0)
3065  pkt.size = 0;
3066  ret = avcodec_receive_frame(avctx, frame);
3067  if (ret >= 0)
3068  got_picture = 1;
3069  if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
3070  ret = 0;
3071  } else if (avctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
3072  ret = avcodec_decode_subtitle2(avctx, &subtitle,
3073  &got_picture, &pkt);
3074  if (got_picture)
3075  avsubtitle_free(&subtitle);
3076  if (ret >= 0)
3077  pkt.size = 0;
3078  }
3079  if (ret >= 0) {
3080  if (got_picture)
3081  st->internal->nb_decoded_frames++;
3082  ret = got_picture;
3083  }
3084  }
3085 
3086  if (!pkt.data && !got_picture)
3087  ret = -1;
3088 
3089 fail:
3090  if (do_skip_frame) {
3091  avctx->skip_frame = skip_frame;
3092  }
3093 
3094  av_frame_free(&frame);
3095  return ret;
3096 }
3097 
3098 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
3099 {
3100  while (tags->id != AV_CODEC_ID_NONE) {
3101  if (tags->id == id)
3102  return tags->tag;
3103  tags++;
3104  }
3105  return 0;
3106 }
3107 
3108 enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
3109 {
3110  int i;
3111  for (i = 0; tags[i].id != AV_CODEC_ID_NONE; i++)
3112  if (tag == tags[i].tag)
3113  return tags[i].id;
3114  for (i = 0; tags[i].id != AV_CODEC_ID_NONE; i++)
3115  if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag))
3116  return tags[i].id;
3117  return AV_CODEC_ID_NONE;
3118 }
3119 
3120 enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags)
3121 {
3122  if (bps <= 0 || bps > 64)
3123  return AV_CODEC_ID_NONE;
3124 
3125  if (flt) {
3126  switch (bps) {
3127  case 32:
3129  case 64:
3131  default:
3132  return AV_CODEC_ID_NONE;
3133  }
3134  } else {
3135  bps += 7;
3136  bps >>= 3;
3137  if (sflags & (1 << (bps - 1))) {
3138  switch (bps) {
3139  case 1:
3140  return AV_CODEC_ID_PCM_S8;
3141  case 2:
3143  case 3:
3145  case 4:
3147  case 8:
3149  default:
3150  return AV_CODEC_ID_NONE;
3151  }
3152  } else {
3153  switch (bps) {
3154  case 1:
3155  return AV_CODEC_ID_PCM_U8;
3156  case 2:
3158  case 3:
3160  case 4:
3162  default:
3163  return AV_CODEC_ID_NONE;
3164  }
3165  }
3166  }
3167 }
3168 
3169 unsigned int av_codec_get_tag(const AVCodecTag *const *tags, enum AVCodecID id)
3170 {
3171  unsigned int tag;
3172  if (!av_codec_get_tag2(tags, id, &tag))
3173  return 0;
3174  return tag;
3175 }
3176 
3177 int av_codec_get_tag2(const AVCodecTag * const *tags, enum AVCodecID id,
3178  unsigned int *tag)
3179 {
3180  int i;
3181  for (i = 0; tags && tags[i]; i++) {
3182  const AVCodecTag *codec_tags = tags[i];
3183  while (codec_tags->id != AV_CODEC_ID_NONE) {
3184  if (codec_tags->id == id) {
3185  *tag = codec_tags->tag;
3186  return 1;
3187  }
3188  codec_tags++;
3189  }
3190  }
3191  return 0;
3192 }
3193 
3194 enum AVCodecID av_codec_get_id(const AVCodecTag *const *tags, unsigned int tag)
3195 {
3196  int i;
3197  for (i = 0; tags && tags[i]; i++) {
3198  enum AVCodecID id = ff_codec_get_id(tags[i], tag);
3199  if (id != AV_CODEC_ID_NONE)
3200  return id;
3201  }
3202  return AV_CODEC_ID_NONE;
3203 }
3204 
3205 static int chapter_start_cmp(const void *p1, const void *p2)
3206 {
3207  AVChapter *ch1 = *(AVChapter**)p1;
3208  AVChapter *ch2 = *(AVChapter**)p2;
3209  int delta = av_compare_ts(ch1->start, ch1->time_base, ch2->start, ch2->time_base);
3210  if (delta)
3211  return delta;
3212  return (ch1 > ch2) - (ch1 < ch2);
3213 }
3214 
3216 {
3217  unsigned int i;
3218  int64_t max_time = 0;
3219  AVChapter **timetable = av_malloc(s->nb_chapters * sizeof(*timetable));
3220 
3221  if (!timetable)
3222  return AVERROR(ENOMEM);
3223 
3224  if (s->duration > 0 && s->start_time < INT64_MAX - s->duration)
3225  max_time = s->duration +
3226  ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
3227 
3228  for (i = 0; i < s->nb_chapters; i++)
3229  timetable[i] = s->chapters[i];
3230  qsort(timetable, s->nb_chapters, sizeof(*timetable), chapter_start_cmp);
3231 
3232  for (i = 0; i < s->nb_chapters; i++)
3233  if (timetable[i]->end == AV_NOPTS_VALUE) {
3234  AVChapter *ch = timetable[i];
3235  int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q,
3236  ch->time_base)
3237  : INT64_MAX;
3238 
3239  if (i + 1 < s->nb_chapters) {
3240  AVChapter *ch1 = timetable[i + 1];
3241  int64_t next_start = av_rescale_q(ch1->start, ch1->time_base,
3242  ch->time_base);
3243  if (next_start > ch->start && next_start < end)
3244  end = next_start;
3245  }
3246  ch->end = (end == INT64_MAX || end < ch->start) ? ch->start : end;
3247  }
3248  av_free(timetable);
3249  return 0;
3250 }
3251 
3252 static int get_std_framerate(int i)
3253 {
3254  if (i < 30*12)
3255  return (i + 1) * 1001;
3256  i -= 30*12;
3257 
3258  if (i < 30)
3259  return (i + 31) * 1001 * 12;
3260  i -= 30;
3261 
3262  if (i < 3)
3263  return ((const int[]) { 80, 120, 240})[i] * 1001 * 12;
3264 
3265  i -= 3;
3266 
3267  return ((const int[]) { 24, 30, 60, 12, 15, 48 })[i] * 1000 * 12;
3268 }
3269 
3270 /* Is the time base unreliable?
3271  * This is a heuristic to balance between quick acceptance of the values in
3272  * the headers vs. some extra checks.
3273  * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
3274  * MPEG-2 commonly misuses field repeat flags to store different framerates.
3275  * And there are "variable" fps files this needs to detect as well. */
3277 {
3278  if (c->time_base.den >= 101LL * c->time_base.num ||
3279  c->time_base.den < 5LL * c->time_base.num ||
3280  // c->codec_tag == AV_RL32("DIVX") ||
3281  // c->codec_tag == AV_RL32("XVID") ||
3282  c->codec_tag == AV_RL32("mp4v") ||
3284  c->codec_id == AV_CODEC_ID_GIF ||
3285  c->codec_id == AV_CODEC_ID_HEVC ||
3286  c->codec_id == AV_CODEC_ID_H264)
3287  return 1;
3288  return 0;
3289 }
3290 
3292 {
3293  av_freep(&par->extradata);
3294  par->extradata_size = 0;
3295 
3297  return AVERROR(EINVAL);
3298 
3300  if (!par->extradata)
3301  return AVERROR(ENOMEM);
3302 
3303  memset(par->extradata + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3304  par->extradata_size = size;
3305 
3306  return 0;
3307 }
3308 
3310 {
3311  int ret = ff_alloc_extradata(par, size);
3312  if (ret < 0)
3313  return ret;
3314  ret = avio_read(pb, par->extradata, size);
3315  if (ret != size) {
3316  av_freep(&par->extradata);
3317  par->extradata_size = 0;
3318  av_log(s, AV_LOG_ERROR, "Failed to read extradata of size %d\n", size);
3319  return ret < 0 ? ret : AVERROR_INVALIDDATA;
3320  }
3321 
3322  return ret;
3323 }
3324 
3325 int ff_rfps_add_frame(AVFormatContext *ic, AVStream *st, int64_t ts)
3326 {
3327  int i, j;
3328  int64_t last = st->internal->info->last_dts;
3329 
3330  if ( ts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && ts > last
3331  && ts - (uint64_t)last < INT64_MAX) {
3332  double dts = (is_relative(ts) ? ts - RELATIVE_TS_BASE : ts) * av_q2d(st->time_base);
3333  int64_t duration = ts - last;
3334 
3335  if (!st->internal->info->duration_error)
3336  st->internal->info->duration_error = av_mallocz(sizeof(st->internal->info->duration_error[0])*2);
3337  if (!st->internal->info->duration_error)
3338  return AVERROR(ENOMEM);
3339 
3340 // if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
3341 // av_log(NULL, AV_LOG_ERROR, "%f\n", dts);
3342  for (i = 0; i<MAX_STD_TIMEBASES; i++) {
3343  if (st->internal->info->duration_error[0][1][i] < 1e10) {
3344  int framerate = get_std_framerate(i);
3345  double sdts = dts*framerate/(1001*12);
3346  for (j= 0; j<2; j++) {
3347  int64_t ticks = llrint(sdts+j*0.5);
3348  double error= sdts - ticks + j*0.5;
3349  st->internal->info->duration_error[j][0][i] += error;
3350  st->internal->info->duration_error[j][1][i] += error*error;
3351  }
3352  }
3353  }
3354  if (st->internal->info->rfps_duration_sum <= INT64_MAX - duration) {
3355  st->internal->info->duration_count++;
3357  }
3358 
3359  if (st->internal->info->duration_count % 10 == 0) {
3360  int n = st->internal->info->duration_count;
3361  for (i = 0; i<MAX_STD_TIMEBASES; i++) {
3362  if (st->internal->info->duration_error[0][1][i] < 1e10) {
3363  double a0 = st->internal->info->duration_error[0][0][i] / n;
3364  double error0 = st->internal->info->duration_error[0][1][i] / n - a0*a0;
3365  double a1 = st->internal->info->duration_error[1][0][i] / n;
3366  double error1 = st->internal->info->duration_error[1][1][i] / n - a1*a1;
3367  if (error0 > 0.04 && error1 > 0.04) {
3368  st->internal->info->duration_error[0][1][i] = 2e10;
3369  st->internal->info->duration_error[1][1][i] = 2e10;
3370  }
3371  }
3372  }
3373  }
3374 
3375  // ignore the first 4 values, they might have some random jitter
3376  if (st->internal->info->duration_count > 3 && is_relative(ts) == is_relative(last))
3377  st->internal->info->duration_gcd = av_gcd(st->internal->info->duration_gcd, duration);
3378  }
3379  if (ts != AV_NOPTS_VALUE)
3380  st->internal->info->last_dts = ts;
3381 
3382  return 0;
3383 }
3384 
3386 {
3387  int i, j;
3388 
3389  for (i = 0; i < ic->nb_streams; i++) {
3390  AVStream *st = ic->streams[i];
3391 
3393  continue;
3394  // the check for tb_unreliable() is not completely correct, since this is not about handling
3395  // an unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
3396  // ipmovie.c produces.
3397  if (tb_unreliable(st->internal->avctx) && st->internal->info->duration_count > 15 && st->internal->info->duration_gcd > FFMAX(1, st->time_base.den/(500LL*st->time_base.num)) && !st->r_frame_rate.num)
3398  av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, st->time_base.den, st->time_base.num * st->internal->info->duration_gcd, INT_MAX);
3399  if (st->internal->info->duration_count>1 && !st->r_frame_rate.num
3400  && tb_unreliable(st->internal->avctx)) {
3401  int num = 0;
3402  double best_error= 0.01;
3403  AVRational ref_rate = st->r_frame_rate.num ? st->r_frame_rate : av_inv_q(st->time_base);
3404 
3405  for (j= 0; j<MAX_STD_TIMEBASES; j++) {
3406  int k;
3407 
3408  if (st->internal->info->codec_info_duration &&
3409  st->internal->info->codec_info_duration*av_q2d(st->time_base) < (1001*11.5)/get_std_framerate(j))
3410  continue;
3411  if (!st->internal->info->codec_info_duration && get_std_framerate(j) < 1001*12)
3412  continue;
3413 
3414  if (av_q2d(st->time_base) * st->internal->info->rfps_duration_sum / st->internal->info->duration_count < (1001*12.0 * 0.8)/get_std_framerate(j))
3415  continue;
3416 
3417  for (k= 0; k<2; k++) {
3418  int n = st->internal->info->duration_count;
3419  double a= st->internal->info->duration_error[k][0][j] / n;
3420  double error= st->internal->info->duration_error[k][1][j]/n - a*a;
3421 
3422  if (error < best_error && best_error> 0.000000001) {
3423  best_error= error;
3424  num = get_std_framerate(j);
3425  }
3426  if (error < 0.02)
3427  av_log(ic, AV_LOG_DEBUG, "rfps: %f %f\n", get_std_framerate(j) / 12.0/1001, error);
3428  }
3429  }
3430  // do not increase frame rate by more than 1 % in order to match a standard rate.
3431  if (num && (!ref_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(ref_rate)))
3432  av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
3433  }
3434  if ( !st->avg_frame_rate.num
3436  && st->internal->info->codec_info_duration <= 0
3437  && st->internal->info->duration_count > 2
3438  && fabs(1.0 / (av_q2d(st->r_frame_rate) * av_q2d(st->time_base)) - st->internal->info->rfps_duration_sum / (double)st->internal->info->duration_count) <= 1.0
3439  ) {
3440  av_log(ic, AV_LOG_DEBUG, "Setting avg frame rate based on r frame rate\n");
3441  st->avg_frame_rate = st->r_frame_rate;
3442  }
3443 
3446  st->internal->info->duration_count = 0;
3447  st->internal->info->rfps_duration_sum = 0;
3448  }
3449 }
3450 
3452 {
3453  const AVBitStreamFilter *f;
3454 
3455  f = av_bsf_get_by_name("extract_extradata");
3456  if (!f)
3457  return 0;
3458 
3459  if (f->codec_ids) {
3460  const enum AVCodecID *ids;
3461  for (ids = f->codec_ids; *ids != AV_CODEC_ID_NONE; ids++)
3462  if (*ids == st->codecpar->codec_id)
3463  return 1;
3464  }
3465 
3466  return 0;
3467 }
3468 
3470 {
3471  AVStreamInternal *sti = st->internal;
3472  const AVBitStreamFilter *f;
3473  int ret;
3474 
3475  f = av_bsf_get_by_name("extract_extradata");
3476  if (!f)
3477  goto finish;
3478 
3479  /* check that the codec id is supported */
3480  ret = extract_extradata_check(st);
3481  if (!ret)
3482  goto finish;
3483 
3485  if (!sti->extract_extradata.pkt)
3486  return AVERROR(ENOMEM);
3487 
3488  ret = av_bsf_alloc(f, &sti->extract_extradata.bsf);
3489  if (ret < 0)
3490  goto fail;
3491 
3493  st->codecpar);
3494  if (ret < 0)
3495  goto fail;
3496 
3498 
3499  ret = av_bsf_init(sti->extract_extradata.bsf);
3500  if (ret < 0)
3501  goto fail;
3502 
3503 finish:
3504  sti->extract_extradata.inited = 1;
3505 
3506  return 0;
3507 fail:
3510  return ret;
3511 }
3512 
3513 static int extract_extradata(AVStream *st, const AVPacket *pkt)
3514 {
3515  AVStreamInternal *sti = st->internal;
3516  AVPacket *pkt_ref;
3517  int ret;
3518 
3519  if (!sti->extract_extradata.inited) {
3520  ret = extract_extradata_init(st);
3521  if (ret < 0)
3522  return ret;
3523  }
3524 
3525  if (sti->extract_extradata.inited && !sti->extract_extradata.bsf)
3526  return 0;
3527 
3528  pkt_ref = sti->extract_extradata.pkt;
3529  ret = av_packet_ref(pkt_ref, pkt);
3530  if (ret < 0)
3531  return ret;
3532 
3533  ret = av_bsf_send_packet(sti->extract_extradata.bsf, pkt_ref);
3534  if (ret < 0) {
3535  av_packet_unref(pkt_ref);
3536  return ret;
3537  }
3538 
3539  while (ret >= 0 && !sti->avctx->extradata) {
3540  ret = av_bsf_receive_packet(sti->extract_extradata.bsf, pkt_ref);
3541  if (ret < 0) {
3542  if (ret != AVERROR(EAGAIN) && ret != AVERROR_EOF)
3543  return ret;
3544  continue;
3545  }
3546 
3547  for (int i = 0; i < pkt_ref->side_data_elems; i++) {
3548  AVPacketSideData *side_data = &pkt_ref->side_data[i];
3549  if (side_data->type == AV_PKT_DATA_NEW_EXTRADATA) {
3550  sti->avctx->extradata = side_data->data;
3551  sti->avctx->extradata_size = side_data->size;
3552  side_data->data = NULL;
3553  side_data->size = 0;
3554  break;
3555  }
3556  }
3557  av_packet_unref(pkt_ref);
3558  }
3559 
3560  return 0;
3561 }
3562 
3564 {
3565  int i;
3566 
3567  for (i = 0; i < avctx->nb_coded_side_data; i++) {
3568  const AVPacketSideData *sd_src = &avctx->coded_side_data[i];
3569  uint8_t *dst_data;
3570  dst_data = av_stream_new_side_data(st, sd_src->type, sd_src->size);
3571  if (!dst_data)
3572  return AVERROR(ENOMEM);
3573  memcpy(dst_data, sd_src->data, sd_src->size);
3574  }
3575  return 0;
3576 }
3577 
3579 {
3580  int i, count = 0, ret = 0, j;
3581  int64_t read_size;
3582  AVStream *st;
3583  AVCodecContext *avctx;
3584  AVPacket pkt1;
3585  int64_t old_offset = avio_tell(ic->pb);
3586  // new streams might appear, no options for those
3587  int orig_nb_streams = ic->nb_streams;
3588  int flush_codecs;
3589  int64_t max_analyze_duration = ic->max_analyze_duration;
3590  int64_t max_stream_analyze_duration;
3591  int64_t max_subtitle_analyze_duration;
3592  int64_t probesize = ic->probesize;
3593  int eof_reached = 0;
3594  int *missing_streams = av_opt_ptr(ic->iformat->priv_class, ic->priv_data, "missing_streams");
3595 
3596  flush_codecs = probesize > 0;
3597 
3598  av_opt_set(ic, "skip_clear", "1", AV_OPT_SEARCH_CHILDREN);
3599 
3600  max_stream_analyze_duration = max_analyze_duration;
3601  max_subtitle_analyze_duration = max_analyze_duration;
3602  if (!max_analyze_duration) {
3603  max_stream_analyze_duration =
3604  max_analyze_duration = 5*AV_TIME_BASE;
3605  max_subtitle_analyze_duration = 30*AV_TIME_BASE;
3606  if (!strcmp(ic->iformat->name, "flv"))
3607  max_stream_analyze_duration = 90*AV_TIME_BASE;
3608  if (!strcmp(ic->iformat->name, "mpeg") || !strcmp(ic->iformat->name, "mpegts"))
3609  max_stream_analyze_duration = 7*AV_TIME_BASE;
3610  }
3611 
3612  if (ic->pb)
3613  av_log(ic, AV_LOG_DEBUG, "Before avformat_find_stream_info() pos: %"PRId64" bytes read:%"PRId64" seeks:%d nb_streams:%d\n",
3614  avio_tell(ic->pb), ic->pb->bytes_read, ic->pb->seek_count, ic->nb_streams);
3615 
3616  for (i = 0; i < ic->nb_streams; i++) {
3617  const AVCodec *codec;
3618  AVDictionary *thread_opt = NULL;
3619  st = ic->streams[i];
3620  avctx = st->internal->avctx;
3621 
3622  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO ||
3624 /* if (!st->time_base.num)
3625  st->time_base = */
3626  if (!avctx->time_base.num)
3627  avctx->time_base = st->time_base;
3628  }
3629 
3630  /* check if the caller has overridden the codec id */
3631 #if FF_API_LAVF_AVCTX
3633  if (st->codec->codec_id != st->internal->orig_codec_id) {
3634  st->codecpar->codec_id = st->codec->codec_id;
3635  st->codecpar->codec_type = st->codec->codec_type;
3636  st->internal->orig_codec_id = st->codec->codec_id;
3637  }
3639 #endif
3640  // only for the split stuff
3641  if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE) && st->internal->request_probe <= 0) {
3642  st->parser = av_parser_init(st->codecpar->codec_id);
3643  if (st->parser) {
3644  if (st->need_parsing == AVSTREAM_PARSE_HEADERS) {
3646  } else if (st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
3648  }
3649  } else if (st->need_parsing) {
3650  av_log(ic, AV_LOG_VERBOSE, "parser not found for codec "
3651  "%s, packets or times may be invalid.\n",
3653  }
3654  }
3655 
3656  if (st->codecpar->codec_id != st->internal->orig_codec_id)
3658 
3660  if (ret < 0)
3661  goto find_stream_info_err;
3662  if (st->internal->request_probe <= 0)
3663  st->internal->avctx_inited = 1;
3664 
3665  codec = find_probe_decoder(ic, st, st->codecpar->codec_id);
3666 
3667  /* Force thread count to 1 since the H.264 decoder will not extract
3668  * SPS and PPS to extradata during multi-threaded decoding. */
3669  av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0);
3670  /* Force lowres to 0. The decoder might reduce the video size by the
3671  * lowres factor, and we don't want that propagated to the stream's
3672  * codecpar */
3673  av_dict_set(options ? &options[i] : &thread_opt, "lowres", "0", 0);
3674 
3675  if (ic->codec_whitelist)
3676  av_dict_set(options ? &options[i] : &thread_opt, "codec_whitelist", ic->codec_whitelist, 0);
3677 
3678  /* Ensure that subtitle_header is properly set. */
3680  && codec && !avctx->codec) {
3681  if (avcodec_open2(avctx, codec, options ? &options[i] : &thread_opt) < 0)
3682  av_log(ic, AV_LOG_WARNING,
3683  "Failed to open codec in %s\n",__FUNCTION__);
3684  }
3685 
3686  // Try to just open decoders, in case this is enough to get parameters.
3687  if (!has_codec_parameters(st, NULL) && st->internal->request_probe <= 0) {
3688  if (codec && !avctx->codec)
3689  if (avcodec_open2(avctx, codec, options ? &options[i] : &thread_opt) < 0)
3690  av_log(ic, AV_LOG_WARNING,
3691  "Failed to open codec in %s\n",__FUNCTION__);
3692  }
3693  if (!options)
3694  av_dict_free(&thread_opt);
3695  }
3696 
3697  for (i = 0; i < ic->nb_streams; i++) {
3698 #if FF_API_R_FRAME_RATE
3700 #endif
3703  }
3704 
3705  read_size = 0;
3706  for (;;) {
3707  const AVPacket *pkt;
3708  int analyzed_all_streams;
3710  ret = AVERROR_EXIT;
3711  av_log(ic, AV_LOG_DEBUG, "interrupted\n");
3712  break;
3713  }
3714 
3715  /* check if one codec still needs to be handled */
3716  for (i = 0; i < ic->nb_streams; i++) {
3717  int fps_analyze_framecount = 20;
3718  int count;
3719 
3720  st = ic->streams[i];
3721  if (!has_codec_parameters(st, NULL))
3722  break;
3723  /* If the timebase is coarse (like the usual millisecond precision
3724  * of mkv), we need to analyze more frames to reliably arrive at
3725  * the correct fps. */
3726  if (av_q2d(st->time_base) > 0.0005)
3727  fps_analyze_framecount *= 2;
3728  if (!tb_unreliable(st->internal->avctx))
3729  fps_analyze_framecount = 0;
3730  if (ic->fps_probe_size >= 0)
3731  fps_analyze_framecount = ic->fps_probe_size;
3733  fps_analyze_framecount = 0;
3734  /* variable fps and no guess at the real fps */
3735  count = (ic->iformat->flags & AVFMT_NOTIMESTAMPS) ?
3738  if (!(st->r_frame_rate.num && st->avg_frame_rate.num) &&
3740  if (count < fps_analyze_framecount)
3741  break;
3742  }
3743  // Look at the first 3 frames if there is evidence of frame delay
3744  // but the decoder delay is not set.
3745  if (st->internal->info->frame_delay_evidence && count < 2 && st->internal->avctx->has_b_frames == 0)
3746  break;
3747  if (!st->internal->avctx->extradata &&
3749  st->internal->extract_extradata.bsf) &&
3751  break;
3752  if (st->first_dts == AV_NOPTS_VALUE &&
3753  !(ic->iformat->flags & AVFMT_NOTIMESTAMPS) &&
3757  break;
3758  }
3759  analyzed_all_streams = 0;
3760  if (!missing_streams || !*missing_streams)
3761  if (i == ic->nb_streams) {
3762  analyzed_all_streams = 1;
3763  /* NOTE: If the format has no header, then we need to read some
3764  * packets to get most of the streams, so we cannot stop here. */
3765  if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
3766  /* If we found the info for all the codecs, we can stop. */
3767  ret = count;
3768  av_log(ic, AV_LOG_DEBUG, "All info found\n");
3769  flush_codecs = 0;
3770  break;
3771  }
3772  }
3773  /* We did not get all the codec info, but we read too much data. */
3774  if (read_size >= probesize) {
3775  ret = count;
3776  av_log(ic, AV_LOG_DEBUG,
3777  "Probe buffer size limit of %"PRId64" bytes reached\n", probesize);
3778  for (i = 0; i < ic->nb_streams; i++)
3779  if (!ic->streams[i]->r_frame_rate.num &&
3780  ic->streams[i]->internal->info->duration_count <= 1 &&
3782  strcmp(ic->iformat->name, "image2"))
3783  av_log(ic, AV_LOG_WARNING,
3784  "Stream #%d: not enough frames to estimate rate; "
3785  "consider increasing probesize\n", i);
3786  break;
3787  }
3788 
3789  /* NOTE: A new stream can be added there if no header in file
3790  * (AVFMTCTX_NOHEADER). */
3791  ret = read_frame_internal(ic, &pkt1);
3792  if (ret == AVERROR(EAGAIN))
3793  continue;
3794 
3795  if (ret < 0) {
3796  /* EOF or error*/
3797  eof_reached = 1;
3798  break;
3799  }
3800 
3801  if (!(ic->flags & AVFMT_FLAG_NOBUFFER)) {
3804  &pkt1, NULL, 0);
3805  if (ret < 0)
3806  goto unref_then_goto_end;
3807 
3808  pkt = &ic->internal->packet_buffer_end->pkt;
3809  } else {
3810  pkt = &pkt1;
3811  }
3812 
3813  st = ic->streams[pkt->stream_index];
3815  read_size += pkt->size;
3816 
3817  avctx = st->internal->avctx;
3818  if (!st->internal->avctx_inited) {
3820  if (ret < 0)
3821  goto unref_then_goto_end;
3822  st->internal->avctx_inited = 1;
3823  }
3824 
3825  if (pkt->dts != AV_NOPTS_VALUE && st->codec_info_nb_frames > 1) {
3826  /* check for non-increasing dts */
3827  if (st->internal->info->fps_last_dts != AV_NOPTS_VALUE &&
3828  st->internal->info->fps_last_dts >= pkt->dts) {
3829  av_log(ic, AV_LOG_DEBUG,
3830  "Non-increasing DTS in stream %d: packet %d with DTS "
3831  "%"PRId64", packet %d with DTS %"PRId64"\n",
3832  st->index, st->internal->info->fps_last_dts_idx,
3834  pkt->dts);
3835  st->internal->info->fps_first_dts =
3837  }
3838  /* Check for a discontinuity in dts. If the difference in dts
3839  * is more than 1000 times the average packet duration in the
3840  * sequence, we treat it as a discontinuity. */
3841  if (st->internal->info->fps_last_dts != AV_NOPTS_VALUE &&
3843  (pkt->dts - (uint64_t)st->internal->info->fps_last_dts) / 1000 >
3844  (st->internal->info->fps_last_dts - (uint64_t)st->internal->info->fps_first_dts) /
3846  av_log(ic, AV_LOG_WARNING,
3847  "DTS discontinuity in stream %d: packet %d with DTS "
3848  "%"PRId64", packet %d with DTS %"PRId64"\n",
3849  st->index, st->internal->info->fps_last_dts_idx,
3851  pkt->dts);
3852  st->internal->info->fps_first_dts =
3854  }
3855 
3856  /* update stored dts values */
3857  if (st->internal->info->fps_first_dts == AV_NOPTS_VALUE) {
3858  st->internal->info->fps_first_dts = pkt->dts;
3860  }
3861  st->internal->info->fps_last_dts = pkt->dts;
3863  }
3864  if (st->codec_info_nb_frames>1) {
3865  int64_t t = 0;
3866  int64_t limit;
3867 
3868  if (st->time_base.den > 0)
3870  if (st->avg_frame_rate.num > 0)
3872 
3873  if ( t == 0
3874  && st->codec_info_nb_frames>30
3876  && st->internal->info->fps_last_dts != AV_NOPTS_VALUE) {
3877  int64_t dur = av_sat_sub64(st->internal->info->fps_last_dts, st->internal->info->fps_first_dts);
3878  t = FFMAX(t, av_rescale_q(dur, st->time_base, AV_TIME_BASE_Q));
3879  }
3880 
3881  if (analyzed_all_streams) limit = max_analyze_duration;
3882  else if (avctx->codec_type == AVMEDIA_TYPE_SUBTITLE) limit = max_subtitle_analyze_duration;
3883  else limit = max_stream_analyze_duration;
3884 
3885  if (t >= limit) {
3886  av_log(ic, AV_LOG_VERBOSE, "max_analyze_duration %"PRId64" reached at %"PRId64" microseconds st:%d\n",
3887  limit,
3888  t, pkt->stream_index);
3889  if (ic->flags & AVFMT_FLAG_NOBUFFER)
3890  av_packet_unref(&pkt1);
3891  break;
3892  }
3893  if (pkt->duration) {
3894  if (avctx->codec_type == AVMEDIA_TYPE_SUBTITLE && pkt->pts != AV_NOPTS_VALUE && st->start_time != AV_NOPTS_VALUE && pkt->pts >= st->start_time) {
3896  } else
3897  st->internal->info->codec_info_duration += pkt->duration;
3898  st->internal->info->codec_info_duration_fields += st->parser && st->need_parsing && avctx->ticks_per_frame ==2 ? st->parser->repeat_pict + 1 : 2;
3899  }
3900  }
3901  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
3902 #if FF_API_R_FRAME_RATE
3903  ff_rfps_add_frame(ic, st, pkt->dts);
3904 #endif
3905  if (pkt->dts != pkt->pts && pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE)
3907  }
3908  if (!st->internal->avctx->extradata) {
3909  ret = extract_extradata(st, pkt);
3910  if (ret < 0)
3911  goto unref_then_goto_end;
3912  }
3913 
3914  /* If still no information, we try to open the codec and to
3915  * decompress the frame. We try to avoid that in most cases as
3916  * it takes longer and uses more memory. For MPEG-4, we need to
3917  * decompress for QuickTime.
3918  *
3919  * If AV_CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
3920  * least one frame of codec data, this makes sure the codec initializes
3921  * the channel configuration and does not only trust the values from
3922  * the container. */
3923  try_decode_frame(ic, st, pkt,
3924  (options && i < orig_nb_streams) ? &options[i] : NULL);
3925 
3926  if (ic->flags & AVFMT_FLAG_NOBUFFER)
3927  av_packet_unref(&pkt1);
3928 
3929  st->codec_info_nb_frames++;
3930  count++;
3931  }
3932 
3933  if (eof_reached) {
3934  int stream_index;
3935  for (stream_index = 0; stream_index < ic->nb_streams; stream_index++) {
3936  st = ic->streams[stream_index];
3937  avctx = st->internal->avctx;
3938  if (!has_codec_parameters(st, NULL)) {
3939  const AVCodec *codec = find_probe_decoder(ic, st, st->codecpar->codec_id);
3940  if (codec && !avctx->codec) {
3941  AVDictionary *opts = NULL;
3942  if (ic->codec_whitelist)
3943  av_dict_set(&opts, "codec_whitelist", ic->codec_whitelist, 0);
3944  if (avcodec_open2(avctx, codec, (options && stream_index < orig_nb_streams) ? &options[stream_index] : &opts) < 0)
3945  av_log(ic, AV_LOG_WARNING,
3946  "Failed to open codec in %s\n",__FUNCTION__);
3947  av_dict_free(&opts);
3948  }
3949  }
3950 
3951  // EOF already reached while reading the stream above.
3952  // So continue with reoordering DTS with whatever delay we have.
3954  update_dts_from_pts(ic, stream_index, ic->internal->packet_buffer);
3955  }
3956  }
3957  }
3958 
3959  if (flush_codecs) {
3960  AVPacket empty_pkt = { 0 };
3961  int err = 0;
3962  av_init_packet(&empty_pkt);
3963 
3964  for (i = 0; i < ic->nb_streams; i++) {
3965 
3966  st = ic->streams[i];
3967 
3968  /* flush the decoders */
3969  if (st->internal->info->found_decoder == 1) {
3970  do {
3971  err = try_decode_frame(ic, st, &empty_pkt,
3972  (options && i < orig_nb_streams)
3973  ? &options[i] : NULL);
3974  } while (err > 0 && !has_codec_parameters(st, NULL));
3975 
3976  if (err < 0) {
3977  av_log(ic, AV_LOG_INFO,
3978  "decoding for stream %d failed\n", st->index);
3979  }
3980  }
3981  }
3982  }
3983 
3984  ff_rfps_calculate(ic);
3985 
3986  for (i = 0; i < ic->nb_streams; i++) {
3987  st = ic->streams[i];
3988  avctx = st->internal->avctx;
3989  if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
3990  if (avctx->codec_id == AV_CODEC_ID_RAWVIDEO && !avctx->codec_tag && !avctx->bits_per_coded_sample) {
3991  uint32_t tag= avcodec_pix_fmt_to_codec_tag(avctx->pix_fmt);
3993  avctx->codec_tag= tag;
3994  }
3995 
3996  /* estimate average framerate if not set by demuxer */
3998  !st->avg_frame_rate.num &&
4000  int best_fps = 0;
4001  double best_error = 0.01;
4002  AVRational codec_frame_rate = avctx->framerate;
4003 
4004  if (st->internal->info->codec_info_duration >= INT64_MAX / st->time_base.num / 2||
4005  st->internal->info->codec_info_duration_fields >= INT64_MAX / st->time_base.den ||
4006  st->internal->info->codec_info_duration < 0)
4007  continue;
4009  st->internal->info->codec_info_duration_fields * (int64_t) st->time_base.den,
4010  st->internal->info->codec_info_duration * 2 * (int64_t) st->time_base.num, 60000);
4011 
4012  /* Round guessed framerate to a "standard" framerate if it's
4013  * within 1% of the original estimate. */
4014  for (j = 0; j < MAX_STD_TIMEBASES; j++) {
4015  AVRational std_fps = { get_std_framerate(j), 12 * 1001 };
4016  double error = fabs(av_q2d(st->avg_frame_rate) /
4017  av_q2d(std_fps) - 1);
4018 
4019  if (error < best_error) {
4020  best_error = error;
4021  best_fps = std_fps.num;
4022  }
4023 
4024  if (ic->internal->prefer_codec_framerate && codec_frame_rate.num > 0 && codec_frame_rate.den > 0) {
4025  error = fabs(av_q2d(codec_frame_rate) /
4026  av_q2d(std_fps) - 1);
4027  if (error < best_error) {
4028  best_error = error;
4029  best_fps = std_fps.num;
4030  }
4031  }
4032  }
4033  if (best_fps)
4035  best_fps, 12 * 1001, INT_MAX);
4036  }
4037 
4038  if (!st->r_frame_rate.num) {
4039  if ( avctx->time_base.den * (int64_t) st->time_base.num
4040  <= avctx->time_base.num * avctx->ticks_per_frame * (uint64_t) st->time_base.den) {
4042  avctx->time_base.den, (int64_t)avctx->time_base.num * avctx->ticks_per_frame, INT_MAX);
4043  } else {
4044  st->r_frame_rate.num = st->time_base.den;
4045  st->r_frame_rate.den = st->time_base.num;
4046  }
4047  }
4049  AVRational hw_ratio = { avctx->height, avctx->width };
4051  hw_ratio);
4052  }
4053  } else if (avctx->codec_type == AVMEDIA_TYPE_AUDIO) {
4054  if (!avctx->bits_per_coded_sample)
4055  avctx->bits_per_coded_sample =
4057  // set stream disposition based on audio service type
4058  switch (avctx->audio_service_type) {
4061  break;
4064  break;
4067  break;
4070  break;
4073  break;
4074  }
4075  }
4076  }
4077 
4078  if (probesize)
4079  estimate_timings(ic, old_offset);
4080 
4081  av_opt_set(ic, "skip_clear", "0", AV_OPT_SEARCH_CHILDREN);
4082 
4083  if (ret >= 0 && ic->nb_streams)
4084  /* We could not have all the codec parameters before EOF. */
4085  ret = -1;
4086  for (i = 0; i < ic->nb_streams; i++) {
4087  const char *errmsg;
4088  st = ic->streams[i];
4089 
4090  /* if no packet was ever seen, update context now for has_codec_parameters */
4091  if (!st->internal->avctx_inited) {
4092  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
4094  st->codecpar->format = st->internal->avctx->sample_fmt;
4096  if (ret < 0)
4097  goto find_stream_info_err;
4098  }
4099  if (!has_codec_parameters(st, &errmsg)) {
4100  char buf[256];
4101  avcodec_string(buf, sizeof(buf), st->internal->avctx, 0);
4102  av_log(ic, AV_LOG_WARNING,
4103  "Could not find codec parameters for stream %d (%s): %s\n"
4104  "Consider increasing the value for the 'analyzeduration' (%"PRId64") and 'probesize' (%"PRId64") options\n",
4105  i, buf, errmsg, ic->max_analyze_duration, ic->probesize);
4106  } else {
4107  ret = 0;
4108  }
4109  }
4110 
4111  ret = compute_chapters_end(ic);
4112  if (ret < 0)
4113  goto find_stream_info_err;
4114 
4115  /* update the stream parameters from the internal codec contexts */
4116  for (i = 0; i < ic->nb_streams; i++) {
4117  st = ic->streams[i];
4118 
4119  if (st->internal->avctx_inited) {
4121  if (ret < 0)
4122  goto find_stream_info_err;
4123  ret = add_coded_side_data(st, st->internal->avctx);
4124  if (ret < 0)
4125  goto find_stream_info_err;
4126  }
4127 
4128 #if FF_API_LAVF_AVCTX
4130  ret = avcodec_parameters_to_context(st->codec, st->codecpar);
4131  if (ret < 0)
4132  goto find_stream_info_err;
4133 
4134  // The old API (AVStream.codec) "requires" the resolution to be adjusted
4135  // by the lowres factor.
4136  if (st->internal->avctx->lowres && st->internal->avctx->width) {
4137  st->codec->lowres = st->internal->avctx->lowres;
4138  st->codec->width = st->internal->avctx->width;
4139  st->codec->height = st->internal->avctx->height;
4140  }
4141 
4142  if (st->codec->codec_tag != MKTAG('t','m','c','d')) {
4143  st->codec->time_base = st->internal->avctx->time_base;
4144  st->codec->ticks_per_frame = st->internal->avctx->ticks_per_frame;
4145  }
4146  st->codec->framerate = st->avg_frame_rate;
4147 
4148  if (st->internal->avctx->subtitle_header) {
4149  st->codec->subtitle_header = av_malloc(st->internal->avctx->subtitle_header_size);
4150  if (!st->codec->subtitle_header)
4151  goto find_stream_info_err;
4152  st->codec->subtitle_header_size = st->internal->avctx->subtitle_header_size;
4153  memcpy(st->codec->subtitle_header, st->internal->avctx->subtitle_header,
4154  st->codec->subtitle_header_size);
4155  }
4156 
4157  // Fields unavailable in AVCodecParameters
4158  st->codec->coded_width = st->internal->avctx->coded_width;
4159  st->codec->coded_height = st->internal->avctx->coded_height;
4160  st->codec->properties = st->internal->avctx->properties;
4162 #endif
4163 
4164  st->internal->avctx_inited = 0;
4165  }
4166 
4167 find_stream_info_err:
4168  for (i = 0; i < ic->nb_streams; i++) {
4169  st = ic->streams[i];
4170  if (st->internal->info)
4172  avcodec_close(ic->streams[i]->internal->avctx);
4173  av_freep(&ic->streams[i]->internal->info);
4176  }
4177  if (ic->pb)
4178  av_log(ic, AV_LOG_DEBUG, "After avformat_find_stream_info() pos: %"PRId64" bytes read:%"PRId64" seeks:%d frames:%d\n",
4179  avio_tell(ic->pb), ic->pb->bytes_read, ic->pb->seek_count, count);
4180  return ret;
4181 
4182 unref_then_goto_end:
4183  av_packet_unref(&pkt1);
4184  goto find_stream_info_err;
4185 }
4186 
4188 {
4189  int i, j;
4190 
4191  for (i = 0; i < ic->nb_programs; i++) {
4192  if (ic->programs[i] == last) {
4193  last = NULL;
4194  } else {
4195  if (!last)
4196  for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
4197  if (ic->programs[i]->stream_index[j] == s)
4198  return ic->programs[i];
4199  }
4200  }
4201  return NULL;
4202 }
4203 
4205  int wanted_stream_nb, int related_stream,
4206  AVCodec **decoder_ret, int flags)
4207 {
4208  int i, nb_streams = ic->nb_streams;
4210  int best_count = -1, best_multiframe = -1, best_disposition = -1;
4211  int count, multiframe, disposition;
4212  int64_t best_bitrate = -1;
4213  int64_t bitrate;
4214  unsigned *program = NULL;
4215  const AVCodec *decoder = NULL, *best_decoder = NULL;
4216 
4217  if (related_stream >= 0 && wanted_stream_nb < 0) {
4218  AVProgram *p = av_find_program_from_stream(ic, NULL, related_stream);
4219  if (p) {
4220  program = p->stream_index;
4221  nb_streams = p->nb_stream_indexes;
4222  }
4223  }
4224  for (i = 0; i < nb_streams; i++) {
4225  int real_stream_index = program ? program[i] : i;
4226  AVStream *st = ic->streams[real_stream_index];
4227  AVCodecParameters *par = st->codecpar;
4228  if (par->codec_type != type)
4229  continue;
4230  if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
4231  continue;
4232  if (type == AVMEDIA_TYPE_AUDIO && !(par->channels && par->sample_rate))
4233  continue;
4234  if (decoder_ret) {
4235  decoder = find_decoder(ic, st, par->codec_id);
4236  if (!decoder) {
4237  if (ret < 0)
4239  continue;
4240  }
4241  }
4243  + !! (st->disposition & AV_DISPOSITION_DEFAULT);
4244  count = st->codec_info_nb_frames;
4245  bitrate = par->bit_rate;
4246  multiframe = FFMIN(5, count);
4247  if ((best_disposition > disposition) ||
4248  (best_disposition == disposition && best_multiframe > multiframe) ||
4249  (best_disposition == disposition && best_multiframe == multiframe && best_bitrate > bitrate) ||
4250  (best_disposition == disposition && best_multiframe == multiframe && best_bitrate == bitrate && best_count >= count))
4251  continue;
4252  best_disposition = disposition;
4253  best_count = count;
4254  best_bitrate = bitrate;
4255  best_multiframe = multiframe;
4256  ret = real_stream_index;
4257  best_decoder = decoder;
4258  if (program && i == nb_streams - 1 && ret < 0) {
4259  program = NULL;
4260  nb_streams = ic->nb_streams;
4261  /* no related stream found, try again with everything */
4262  i = 0;
4263  }
4264  }
4265  if (decoder_ret)
4266  *decoder_ret = (AVCodec*)best_decoder;
4267  return ret;
4268 }
4269 
4270 /*******************************************************/
4271 
4273 {
4274  if (s->iformat->read_play)
4275  return s->iformat->read_play(s);
4276  if (s->pb)
4277  return avio_pause(s->pb, 0);
4278  return AVERROR(ENOSYS);
4279 }
4280 
4282 {
4283  if (s->iformat->read_pause)
4284  return s->iformat->read_pause(s);
4285  if (s->pb)
4286  return avio_pause(s->pb, 1);
4287  return AVERROR(ENOSYS);
4288 }
4289 
4291 {
4292  int ret, i;
4293 
4294  dst->id = src->id;
4295  dst->time_base = src->time_base;
4296  dst->nb_frames = src->nb_frames;
4297  dst->disposition = src->disposition;
4299  dst->avg_frame_rate = src->avg_frame_rate;
4300  dst->r_frame_rate = src->r_frame_rate;
4301 
4302  av_dict_free(&dst->metadata);
4303  ret = av_dict_copy(&dst->metadata, src->metadata, 0);
4304  if (ret < 0)
4305  return ret;
4306 
4307  ret = avcodec_parameters_copy(dst->codecpar, src->codecpar);
4308  if (ret < 0)
4309  return ret;
4310 
4311  /* Free existing side data*/
4312  for (i = 0; i < dst->nb_side_data; i++)
4313  av_free(dst->side_data[i].data);
4314  av_freep(&dst->side_data);
4315  dst->nb_side_data = 0;
4316 
4317  /* Copy side data if present */
4318  if (src->nb_side_data) {
4320  sizeof(AVPacketSideData));
4321  if (!dst->side_data)
4322  return AVERROR(ENOMEM);
4323  dst->nb_side_data = src->nb_side_data;
4324 
4325  for (i = 0; i < src->nb_side_data; i++) {
4326  uint8_t *data = av_memdup(src->side_data[i].data,
4327  src->side_data[i].size);
4328  if (!data)
4329  return AVERROR(ENOMEM);
4330  dst->side_data[i].type = src->side_data[i].type;
4331  dst->side_data[i].size = src->side_data[i].size;
4332  dst->side_data[i].data = data;
4333  }
4334  }
4335 
4336 #if FF_API_LAVF_FFSERVER
4338  av_freep(&dst->recommended_encoder_configuration);
4339  if (src->recommended_encoder_configuration) {
4340  const char *conf_str = src->recommended_encoder_configuration;
4341  dst->recommended_encoder_configuration = av_strdup(conf_str);
4342  if (!dst->recommended_encoder_configuration)
4343  return AVERROR(ENOMEM);
4344  }
4346 #endif
4347 
4348  return 0;
4349 }
4350 
4351 static void free_stream(AVStream **pst)
4352 {
4353  AVStream *st = *pst;
4354  int i;
4355 
4356  if (!st)
4357  return;
4358 
4359  for (i = 0; i < st->nb_side_data; i++)
4360  av_freep(&st->side_data[i].data);
4361  av_freep(&st->side_data);
4362 
4363  if (st->parser)
4364  av_parser_close(st->parser);
4365 
4366  if (st->attached_pic.data)
4368 
4369  if (st->internal) {
4371  av_bsf_free(&st->internal->bsfc);
4372  av_freep(&st->internal->priv_pts);
4375 
4378 
4379  if (st->internal->info)
4381  av_freep(&st->internal->info);
4382  }
4383  av_freep(&st->internal);
4384 
4385  av_dict_free(&st->metadata);
4387 #if FF_API_LAVF_AVCTX
4389  avcodec_free_context(&st->codec);
4391 #endif
4392  av_freep(&st->priv_data);
4393 #if FF_API_LAVF_FFSERVER
4395  av_freep(&st->recommended_encoder_configuration);
4397 #endif
4398 
4399  av_freep(pst);
4400 }
4401 
4403 {
4404  av_assert0(s->nb_streams>0);
4405  av_assert0(s->streams[ s->nb_streams - 1 ] == st);
4406 
4407  free_stream(&s->streams[ --s->nb_streams ]);
4408 }
4409 
4411 {
4412  int i;
4413 
4414  if (!s)
4415  return;
4416 
4417  if (s->oformat && s->oformat->deinit && s->internal->initialized)
4418  s->oformat->deinit(s);
4419 
4420  av_opt_free(s);
4421  if (s->iformat && s->iformat->priv_class && s->priv_data)
4422  av_opt_free(s->priv_data);
4423  if (s->oformat && s->oformat->priv_class && s->priv_data)
4424  av_opt_free(s->priv_data);
4425 
4426  for (i = 0; i < s->nb_streams; i++)
4427  free_stream(&s->streams[i]);
4428  s->nb_streams = 0;
4429 
4430  for (i = 0; i < s->nb_programs; i++) {
4431  av_dict_free(&s->programs[i]->metadata);
4432  av_freep(&s->programs[i]->stream_index);
4433  av_freep(&s->programs[i]);
4434  }
4435  s->nb_programs = 0;
4436 
4437  av_freep(&s->programs);
4438  av_freep(&s->priv_data);
4439  while (s->nb_chapters--) {
4441  av_freep(&s->chapters[s->nb_chapters]);
4442  }
4443  av_freep(&s->chapters);
4444  av_dict_free(&s->metadata);
4446  av_freep(&s->streams);
4447  flush_packet_queue(s);
4448  av_freep(&s->internal);
4449  av_freep(&s->url);
4450  av_free(s);
4451 }
4452 
4454 {
4455  AVFormatContext *s;
4456  AVIOContext *pb;
4457