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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 <stdarg.h>
23 #include <stdint.h>
24 
25 #include "config.h"
26 
27 #include "libavutil/avassert.h"
28 #include "libavutil/avstring.h"
29 #include "libavutil/dict.h"
30 #include "libavutil/internal.h"
31 #include "libavutil/mathematics.h"
32 #include "libavutil/opt.h"
33 #include "libavutil/parseutils.h"
34 #include "libavutil/pixdesc.h"
35 #include "libavutil/thread.h"
36 #include "libavutil/time.h"
38 #include "libavutil/timestamp.h"
39 
40 #include "libavcodec/bytestream.h"
41 #include "libavcodec/internal.h"
42 #include "libavcodec/raw.h"
43 
44 #include "audiointerleave.h"
45 #include "avformat.h"
46 #include "avio_internal.h"
47 #include "id3v2.h"
48 #include "internal.h"
49 #include "metadata.h"
50 #if CONFIG_NETWORK
51 #include "network.h"
52 #endif
53 #include "riff.h"
54 #include "url.h"
55 
56 #include "libavutil/ffversion.h"
57 const char av_format_ffversion[] = "FFmpeg version " FFMPEG_VERSION;
58 
60 
61 /**
62  * @file
63  * various utility functions for use within FFmpeg
64  */
65 
66 unsigned avformat_version(void)
67 {
70 }
71 
72 const char *avformat_configuration(void)
73 {
74  return FFMPEG_CONFIGURATION;
75 }
76 
77 const char *avformat_license(void)
78 {
79 #define LICENSE_PREFIX "libavformat license: "
80  return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
81 }
82 
84 {
85  return ff_mutex_lock(&avformat_mutex) ? -1 : 0;
86 }
87 
89 {
90  return ff_mutex_unlock(&avformat_mutex) ? -1 : 0;
91 }
92 
93 #define RELATIVE_TS_BASE (INT64_MAX - (1LL<<48))
94 
95 static int is_relative(int64_t ts) {
96  return ts > (RELATIVE_TS_BASE - (1LL<<48));
97 }
98 
99 /**
100  * Wrap a given time stamp, if there is an indication for an overflow
101  *
102  * @param st stream
103  * @param timestamp the time stamp to wrap
104  * @return resulting time stamp
105  */
106 static int64_t wrap_timestamp(const AVStream *st, int64_t timestamp)
107 {
109  st->pts_wrap_reference != AV_NOPTS_VALUE && timestamp != AV_NOPTS_VALUE) {
111  timestamp < st->pts_wrap_reference)
112  return timestamp + (1ULL << st->pts_wrap_bits);
113  else if (st->pts_wrap_behavior == AV_PTS_WRAP_SUB_OFFSET &&
114  timestamp >= st->pts_wrap_reference)
115  return timestamp - (1ULL << st->pts_wrap_bits);
116  }
117  return timestamp;
118 }
119 
120 #if FF_API_FORMAT_GET_SET
121 MAKE_ACCESSORS(AVStream, stream, AVRational, r_frame_rate)
122 #if FF_API_LAVF_FFSERVER
124 MAKE_ACCESSORS(AVStream, stream, char *, recommended_encoder_configuration)
126 #endif
129 MAKE_ACCESSORS(AVFormatContext, format, AVCodec *, subtitle_codec)
130 MAKE_ACCESSORS(AVFormatContext, format, AVCodec *, data_codec)
131 MAKE_ACCESSORS(AVFormatContext, format, int, metadata_header_padding)
132 MAKE_ACCESSORS(AVFormatContext, format, void *, opaque)
133 MAKE_ACCESSORS(AVFormatContext, format, av_format_control_message, control_message_cb)
134 #if FF_API_OLD_OPEN_CALLBACKS
136 MAKE_ACCESSORS(AVFormatContext, format, AVOpenCallback, open_cb)
138 #endif
139 #endif
140 
141 int64_t av_stream_get_end_pts(const AVStream *st)
142 {
143  if (st->internal->priv_pts) {
144  return st->internal->priv_pts->val;
145  } else
146  return AV_NOPTS_VALUE;
147 }
148 
150 {
151  return st->parser;
152 }
153 
154 void av_format_inject_global_side_data(AVFormatContext *s)
155 {
156  int i;
158  for (i = 0; i < s->nb_streams; i++) {
159  AVStream *st = s->streams[i];
160  st->inject_global_side_data = 1;
161  }
162 }
163 
164 int ff_copy_whiteblacklists(AVFormatContext *dst, const AVFormatContext *src)
165 {
166  av_assert0(!dst->codec_whitelist &&
167  !dst->format_whitelist &&
168  !dst->protocol_whitelist &&
169  !dst->protocol_blacklist);
170  dst-> codec_whitelist = av_strdup(src->codec_whitelist);
174  if ( (src-> codec_whitelist && !dst-> codec_whitelist)
175  || (src-> format_whitelist && !dst-> format_whitelist)
176  || (src->protocol_whitelist && !dst->protocol_whitelist)
177  || (src->protocol_blacklist && !dst->protocol_blacklist)) {
178  av_log(dst, AV_LOG_ERROR, "Failed to duplicate black/whitelist\n");
179  return AVERROR(ENOMEM);
180  }
181  return 0;
182 }
183 
184 static const AVCodec *find_decoder(AVFormatContext *s, const AVStream *st, enum AVCodecID codec_id)
185 {
186 #if FF_API_LAVF_AVCTX
188  if (st->codec->codec)
189  return st->codec->codec;
191 #endif
192 
193  switch (st->codecpar->codec_type) {
194  case AVMEDIA_TYPE_VIDEO:
195  if (s->video_codec) return s->video_codec;
196  break;
197  case AVMEDIA_TYPE_AUDIO:
198  if (s->audio_codec) return s->audio_codec;
199  break;
201  if (s->subtitle_codec) return s->subtitle_codec;
202  break;
203  }
204 
205  return avcodec_find_decoder(codec_id);
206 }
207 
208 static const AVCodec *find_probe_decoder(AVFormatContext *s, const AVStream *st, enum AVCodecID codec_id)
209 {
210  const AVCodec *codec;
211 
212 #if CONFIG_H264_DECODER
213  /* Other parts of the code assume this decoder to be used for h264,
214  * so force it if possible. */
215  if (codec_id == AV_CODEC_ID_H264)
216  return avcodec_find_decoder_by_name("h264");
217 #endif
218 
219  codec = find_decoder(s, st, codec_id);
220  if (!codec)
221  return NULL;
222 
224  const AVCodec *probe_codec = NULL;
225  while (probe_codec = av_codec_next(probe_codec)) {
226  if (probe_codec->id == codec_id &&
227  av_codec_is_decoder(probe_codec) &&
229  return probe_codec;
230  }
231  }
232  }
233 
234  return codec;
235 }
236 
237 #if FF_API_FORMAT_GET_SET
238 int av_format_get_probe_score(const AVFormatContext *s)
239 {
240  return s->probe_score;
241 }
242 #endif
243 
244 /* an arbitrarily chosen "sane" max packet size -- 50M */
245 #define SANE_CHUNK_SIZE (50000000)
246 
248 {
249  if (s->maxsize>= 0) {
250  int64_t remaining= s->maxsize - avio_tell(s);
251  if (remaining < size) {
252  int64_t newsize = avio_size(s);
253  if (!s->maxsize || s->maxsize<newsize)
254  s->maxsize = newsize - !newsize;
255  remaining= s->maxsize - avio_tell(s);
256  remaining= FFMAX(remaining, 0);
257  }
258 
259  if (s->maxsize>= 0 && remaining+1 < size) {
260  av_log(NULL, remaining ? AV_LOG_ERROR : AV_LOG_DEBUG, "Truncating packet of size %d to %"PRId64"\n", size, remaining+1);
261  size = remaining+1;
262  }
263  }
264  return size;
265 }
266 
267 /* Read the data in sane-sized chunks and append to pkt.
268  * Return the number of bytes read or an error. */
270 {
271  int64_t orig_pos = pkt->pos; // av_grow_packet might reset pos
272  int orig_size = pkt->size;
273  int ret;
274 
275  do {
276  int prev_size = pkt->size;
277  int read_size;
278 
279  /* When the caller requests a lot of data, limit it to the amount
280  * left in file or SANE_CHUNK_SIZE when it is not known. */
281  read_size = size;
282  if (read_size > SANE_CHUNK_SIZE/10) {
283  read_size = ffio_limit(s, read_size);
284  // If filesize/maxsize is unknown, limit to SANE_CHUNK_SIZE
285  if (s->maxsize < 0)
286  read_size = FFMIN(read_size, SANE_CHUNK_SIZE);
287  }
288 
289  ret = av_grow_packet(pkt, read_size);
290  if (ret < 0)
291  break;
292 
293  ret = avio_read(s, pkt->data + prev_size, read_size);
294  if (ret != read_size) {
295  av_shrink_packet(pkt, prev_size + FFMAX(ret, 0));
296  break;
297  }
298 
299  size -= read_size;
300  } while (size > 0);
301  if (size > 0)
302  pkt->flags |= AV_PKT_FLAG_CORRUPT;
303 
304  pkt->pos = orig_pos;
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 
334 static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st,
335  AVProbeData *pd)
336 {
337  static const struct {
338  const char *name;
339  enum AVCodecID id;
340  enum AVMediaType type;
341  } fmt_id_type[] = {
353  { "mjpeg_2000",AV_CODEC_ID_JPEG2000, AVMEDIA_TYPE_VIDEO },
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  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->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 
395 int av_demuxer_open(AVFormatContext *ic) {
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 
447 int ff_packet_list_put(AVPacketList **packet_buffer,
448  AVPacketList **plast_pktl,
449  AVPacket *pkt, int flags)
450 {
451  AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
452  int ret;
453 
454  if (!pktl)
455  return AVERROR(ENOMEM);
456 
457  if (flags & FF_PACKETLIST_FLAG_REF_PACKET) {
458  if ((ret = av_packet_ref(&pktl->pkt, pkt)) < 0) {
459  av_free(pktl);
460  return ret;
461  }
462  } else {
463  // TODO: Adapt callers in this file so the line below can use
464  // av_packet_move_ref() to effectively move the reference
465  // to the list.
466  pktl->pkt = *pkt;
467  }
468 
469  if (*packet_buffer)
470  (*plast_pktl)->next = pktl;
471  else
472  *packet_buffer = pktl;
473 
474  /* Add the packet in the buffered packet list. */
475  *plast_pktl = pktl;
476  return 0;
477 }
478 
479 int avformat_queue_attached_pictures(AVFormatContext *s)
480 {
481  int i, ret;
482  for (i = 0; i < s->nb_streams; i++)
484  s->streams[i]->discard < AVDISCARD_ALL) {
485  if (s->streams[i]->attached_pic.size <= 0) {
487  "Attached picture on stream %d has invalid size, "
488  "ignoring\n", i);
489  continue;
490  }
491 
494  &s->streams[i]->attached_pic,
496  if (ret < 0)
497  return ret;
498  }
499  return 0;
500 }
501 
502 static int update_stream_avctx(AVFormatContext *s)
503 {
504  int i, ret;
505  for (i = 0; i < s->nb_streams; i++) {
506  AVStream *st = s->streams[i];
507 
508  if (!st->internal->need_context_update)
509  continue;
510 
511  /* close parser, because it depends on the codec */
512  if (st->parser && st->internal->avctx->codec_id != st->codecpar->codec_id) {
513  av_parser_close(st->parser);
514  st->parser = NULL;
515  }
516 
517  /* update internal codec context, for the parser */
519  if (ret < 0)
520  return ret;
521 
522 #if FF_API_LAVF_AVCTX
524  /* update deprecated public codec context */
525  ret = avcodec_parameters_to_context(st->codec, st->codecpar);
526  if (ret < 0)
527  return ret;
529 #endif
530 
531  st->internal->need_context_update = 0;
532  }
533  return 0;
534 }
535 
536 
537 int avformat_open_input(AVFormatContext **ps, const char *filename,
539 {
540  AVFormatContext *s = *ps;
541  int i, ret = 0;
542  AVDictionary *tmp = NULL;
543  ID3v2ExtraMeta *id3v2_extra_meta = NULL;
544 
545  if (!s && !(s = avformat_alloc_context()))
546  return AVERROR(ENOMEM);
547  if (!s->av_class) {
548  av_log(NULL, AV_LOG_ERROR, "Input context has not been properly allocated by avformat_alloc_context() and is not NULL either\n");
549  return AVERROR(EINVAL);
550  }
551  if (fmt)
552  s->iformat = fmt;
553 
554  if (options)
555  av_dict_copy(&tmp, *options, 0);
556 
557  if (s->pb) // must be before any goto fail
559 
560  if ((ret = av_opt_set_dict(s, &tmp)) < 0)
561  goto fail;
562 
563  if (!(s->url = av_strdup(filename ? filename : ""))) {
564  ret = AVERROR(ENOMEM);
565  goto fail;
566  }
567 
568 #if FF_API_FORMAT_FILENAME
570  av_strlcpy(s->filename, filename ? filename : "", sizeof(s->filename));
572 #endif
573  if ((ret = init_input(s, filename, &tmp)) < 0)
574  goto fail;
575  s->probe_score = ret;
576 
577  if (!s->protocol_whitelist && s->pb && s->pb->protocol_whitelist) {
579  if (!s->protocol_whitelist) {
580  ret = AVERROR(ENOMEM);
581  goto fail;
582  }
583  }
584 
585  if (!s->protocol_blacklist && s->pb && s->pb->protocol_blacklist) {
587  if (!s->protocol_blacklist) {
588  ret = AVERROR(ENOMEM);
589  goto fail;
590  }
591  }
592 
593  if (s->format_whitelist && av_match_list(s->iformat->name, s->format_whitelist, ',') <= 0) {
594  av_log(s, AV_LOG_ERROR, "Format not on whitelist \'%s\'\n", s->format_whitelist);
595  ret = AVERROR(EINVAL);
596  goto fail;
597  }
598 
600 
601  /* Check filename in case an image number is expected. */
602  if (s->iformat->flags & AVFMT_NEEDNUMBER) {
603  if (!av_filename_number_test(filename)) {
604  ret = AVERROR(EINVAL);
605  goto fail;
606  }
607  }
608 
610 
611  /* Allocate private data. */
612  if (s->iformat->priv_data_size > 0) {
613  if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) {
614  ret = AVERROR(ENOMEM);
615  goto fail;
616  }
617  if (s->iformat->priv_class) {
618  *(const AVClass **) s->priv_data = s->iformat->priv_class;
620  if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
621  goto fail;
622  }
623  }
624 
625  /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */
626  if (s->pb)
627  ff_id3v2_read_dict(s->pb, &s->internal->id3v2_meta, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
628 
629 
630  if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->iformat->read_header)
631  if ((ret = s->iformat->read_header(s)) < 0)
632  goto fail;
633 
634  if (!s->metadata) {
635  s->metadata = s->internal->id3v2_meta;
636  s->internal->id3v2_meta = NULL;
637  } else if (s->internal->id3v2_meta) {
638  int level = AV_LOG_WARNING;
640  level = AV_LOG_ERROR;
641  av_log(s, level, "Discarding ID3 tags because more suitable tags were found.\n");
644  return AVERROR_INVALIDDATA;
645  }
646 
647  if (id3v2_extra_meta) {
648  if (!strcmp(s->iformat->name, "mp3") || !strcmp(s->iformat->name, "aac") ||
649  !strcmp(s->iformat->name, "tta")) {
650  if ((ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0)
651  goto fail;
652  if ((ret = ff_id3v2_parse_chapters(s, &id3v2_extra_meta)) < 0)
653  goto fail;
654  if ((ret = ff_id3v2_parse_priv(s, &id3v2_extra_meta)) < 0)
655  goto fail;
656  } else
657  av_log(s, AV_LOG_DEBUG, "demuxer does not support additional id3 data, skipping\n");
658  }
659  ff_id3v2_free_extra_meta(&id3v2_extra_meta);
660 
661  if ((ret = avformat_queue_attached_pictures(s)) < 0)
662  goto fail;
663 
664  if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->pb && !s->internal->data_offset)
665  s->internal->data_offset = avio_tell(s->pb);
666 
668 
670 
671  for (i = 0; i < s->nb_streams; i++)
673 
674  if (options) {
675  av_dict_free(options);
676  *options = tmp;
677  }
678  *ps = s;
679  return 0;
680 
681 fail:
682  ff_id3v2_free_extra_meta(&id3v2_extra_meta);
683  av_dict_free(&tmp);
684  if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO))
685  avio_closep(&s->pb);
687  *ps = NULL;
688  return ret;
689 }
690 
691 /*******************************************************/
692 
693 static void force_codec_ids(AVFormatContext *s, AVStream *st)
694 {
695  switch (st->codecpar->codec_type) {
696  case AVMEDIA_TYPE_VIDEO:
697  if (s->video_codec_id)
698  st->codecpar->codec_id = s->video_codec_id;
699  break;
700  case AVMEDIA_TYPE_AUDIO:
701  if (s->audio_codec_id)
702  st->codecpar->codec_id = s->audio_codec_id;
703  break;
705  if (s->subtitle_codec_id)
707  break;
708  case AVMEDIA_TYPE_DATA:
709  if (s->data_codec_id)
710  st->codecpar->codec_id = s->data_codec_id;
711  break;
712  }
713 }
714 
715 static int probe_codec(AVFormatContext *s, AVStream *st, const AVPacket *pkt)
716 {
717  if (st->request_probe>0) {
718  AVProbeData *pd = &st->probe_data;
719  int end;
720  av_log(s, AV_LOG_DEBUG, "probing stream %d pp:%d\n", st->index, st->probe_packets);
721  --st->probe_packets;
722 
723  if (pkt) {
724  uint8_t *new_buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
725  if (!new_buf) {
727  "Failed to reallocate probe buffer for stream %d\n",
728  st->index);
729  goto no_packet;
730  }
731  pd->buf = new_buf;
732  memcpy(pd->buf + pd->buf_size, pkt->data, pkt->size);
733  pd->buf_size += pkt->size;
734  memset(pd->buf + pd->buf_size, 0, AVPROBE_PADDING_SIZE);
735  } else {
736 no_packet:
737  st->probe_packets = 0;
738  if (!pd->buf_size) {
740  "nothing to probe for stream %d\n", st->index);
741  }
742  }
743 
745  || st->probe_packets<= 0;
746 
747  if (end || av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)) {
748  int score = set_codec_from_probe_data(s, st, pd);
750  || end) {
751  pd->buf_size = 0;
752  av_freep(&pd->buf);
753  st->request_probe = -1;
754  if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
755  av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
756  } else
757  av_log(s, AV_LOG_WARNING, "probed stream %d failed\n", st->index);
758  }
759  force_codec_ids(s, st);
760  }
761  }
762  return 0;
763 }
764 
765 static int update_wrap_reference(AVFormatContext *s, AVStream *st, int stream_index, AVPacket *pkt)
766 {
767  int64_t ref = pkt->dts;
768  int i, pts_wrap_behavior;
769  int64_t pts_wrap_reference;
770  AVProgram *first_program;
771 
772  if (ref == AV_NOPTS_VALUE)
773  ref = pkt->pts;
774  if (st->pts_wrap_reference != AV_NOPTS_VALUE || st->pts_wrap_bits >= 63 || ref == AV_NOPTS_VALUE || !s->correct_ts_overflow)
775  return 0;
776  ref &= (1LL << st->pts_wrap_bits)-1;
777 
778  // reference time stamp should be 60 s before first time stamp
779  pts_wrap_reference = ref - av_rescale(60, st->time_base.den, st->time_base.num);
780  // if first time stamp is not more than 1/8 and 60s before the wrap point, subtract rather than add wrap offset
781  pts_wrap_behavior = (ref < (1LL << st->pts_wrap_bits) - (1LL << st->pts_wrap_bits-3)) ||
782  (ref < (1LL << st->pts_wrap_bits) - av_rescale(60, st->time_base.den, st->time_base.num)) ?
784 
785  first_program = av_find_program_from_stream(s, NULL, stream_index);
786 
787  if (!first_program) {
788  int default_stream_index = av_find_default_stream_index(s);
789  if (s->streams[default_stream_index]->pts_wrap_reference == AV_NOPTS_VALUE) {
790  for (i = 0; i < s->nb_streams; i++) {
792  continue;
793  s->streams[i]->pts_wrap_reference = pts_wrap_reference;
794  s->streams[i]->pts_wrap_behavior = pts_wrap_behavior;
795  }
796  }
797  else {
798  st->pts_wrap_reference = s->streams[default_stream_index]->pts_wrap_reference;
799  st->pts_wrap_behavior = s->streams[default_stream_index]->pts_wrap_behavior;
800  }
801  }
802  else {
803  AVProgram *program = first_program;
804  while (program) {
805  if (program->pts_wrap_reference != AV_NOPTS_VALUE) {
806  pts_wrap_reference = program->pts_wrap_reference;
807  pts_wrap_behavior = program->pts_wrap_behavior;
808  break;
809  }
810  program = av_find_program_from_stream(s, program, stream_index);
811  }
812 
813  // update every program with differing pts_wrap_reference
814  program = first_program;
815  while (program) {
816  if (program->pts_wrap_reference != pts_wrap_reference) {
817  for (i = 0; i<program->nb_stream_indexes; i++) {
818  s->streams[program->stream_index[i]]->pts_wrap_reference = pts_wrap_reference;
819  s->streams[program->stream_index[i]]->pts_wrap_behavior = pts_wrap_behavior;
820  }
821 
822  program->pts_wrap_reference = pts_wrap_reference;
823  program->pts_wrap_behavior = pts_wrap_behavior;
824  }
825  program = av_find_program_from_stream(s, program, stream_index);
826  }
827  }
828  return 1;
829 }
830 
831 int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
832 {
833  int ret, i, err;
834  AVStream *st;
835 
836  for (;;) {
838 
839  if (pktl) {
840  *pkt = pktl->pkt;
841  st = s->streams[pkt->stream_index];
843  if ((err = probe_codec(s, st, NULL)) < 0)
844  return err;
845  if (st->request_probe <= 0) {
846  s->internal->raw_packet_buffer = pktl->next;
848  av_free(pktl);
849  return 0;
850  }
851  }
852 
853  pkt->data = NULL;
854  pkt->size = 0;
855  av_init_packet(pkt);
856  ret = s->iformat->read_packet(s, pkt);
857  if (ret < 0) {
858  /* Some demuxers return FFERROR_REDO when they consume
859  data and discard it (ignored streams, junk, extradata).
860  We must re-call the demuxer to get the real packet. */
861  if (ret == FFERROR_REDO)
862  continue;
863  if (!pktl || ret == AVERROR(EAGAIN))
864  return ret;
865  for (i = 0; i < s->nb_streams; i++) {
866  st = s->streams[i];
867  if (st->probe_packets || st->request_probe > 0)
868  if ((err = probe_codec(s, st, NULL)) < 0)
869  return err;
870  av_assert0(st->request_probe <= 0);
871  }
872  continue;
873  }
874 
875  err = av_packet_make_refcounted(pkt);
876  if (err < 0)
877  return err;
878 
879  if ((s->flags & AVFMT_FLAG_DISCARD_CORRUPT) &&
880  (pkt->flags & AV_PKT_FLAG_CORRUPT)) {
882  "Dropped corrupted packet (stream = %d)\n",
883  pkt->stream_index);
884  av_packet_unref(pkt);
885  continue;
886  }
887 
888  if (pkt->stream_index >= (unsigned)s->nb_streams) {
889  av_log(s, AV_LOG_ERROR, "Invalid stream index %d\n", pkt->stream_index);
890  continue;
891  }
892 
893  st = s->streams[pkt->stream_index];
894 
896  // correct first time stamps to negative values
897  if (!is_relative(st->first_dts))
898  st->first_dts = wrap_timestamp(st, st->first_dts);
899  if (!is_relative(st->start_time))
900  st->start_time = wrap_timestamp(st, st->start_time);
901  if (!is_relative(st->cur_dts))
902  st->cur_dts = wrap_timestamp(st, st->cur_dts);
903  }
904 
905  pkt->dts = wrap_timestamp(st, pkt->dts);
906  pkt->pts = wrap_timestamp(st, pkt->pts);
907 
908  force_codec_ids(s, st);
909 
910  /* TODO: audio: time filter; video: frame reordering (pts != dts) */
912  pkt->dts = pkt->pts = av_rescale_q(av_gettime(), AV_TIME_BASE_Q, st->time_base);
913 
914  if (!pktl && st->request_probe <= 0)
915  return ret;
916 
919  pkt, 0);
920  if (err)
921  return err;
923 
924  if ((err = probe_codec(s, st, pkt)) < 0)
925  return err;
926  }
927 }
928 
929 
930 /**********************************************************/
931 
933 {
934  switch(avctx->codec_id) {
935  case AV_CODEC_ID_MP1:
936  case AV_CODEC_ID_MP2:
937  case AV_CODEC_ID_MP3:
938  case AV_CODEC_ID_CODEC2:
939  return 1;
940  }
941 
942  return 0;
943 }
944 
945 /**
946  * Return the frame duration in seconds. Return 0 if not available.
947  */
948 void ff_compute_frame_duration(AVFormatContext *s, int *pnum, int *pden, AVStream *st,
950 {
951  AVRational codec_framerate = s->iformat ? st->internal->avctx->framerate :
953  int frame_size, sample_rate;
954 
955 #if FF_API_LAVF_AVCTX
957  if ((!codec_framerate.den || !codec_framerate.num) && st->codec->time_base.den && st->codec->time_base.num)
958  codec_framerate = av_mul_q(av_inv_q(st->codec->time_base), (AVRational){1, st->codec->ticks_per_frame});
960 #endif
961 
962  *pnum = 0;
963  *pden = 0;
964  switch (st->codecpar->codec_type) {
965  case AVMEDIA_TYPE_VIDEO:
966  if (st->r_frame_rate.num && !pc && s->iformat) {
967  *pnum = st->r_frame_rate.den;
968  *pden = st->r_frame_rate.num;
969  } else if (st->time_base.num * 1000LL > st->time_base.den) {
970  *pnum = st->time_base.num;
971  *pden = st->time_base.den;
972  } else if (codec_framerate.den * 1000LL > codec_framerate.num) {
973  av_assert0(st->internal->avctx->ticks_per_frame);
974  av_reduce(pnum, pden,
975  codec_framerate.den,
976  codec_framerate.num * (int64_t)st->internal->avctx->ticks_per_frame,
977  INT_MAX);
978 
979  if (pc && pc->repeat_pict) {
980  av_assert0(s->iformat); // this may be wrong for interlaced encoding but its not used for that case
981  av_reduce(pnum, pden,
982  (*pnum) * (1LL + pc->repeat_pict),
983  (*pden),
984  INT_MAX);
985  }
986  /* If this codec can be interlaced or progressive then we need
987  * a parser to compute duration of a packet. Thus if we have
988  * no parser in such case leave duration undefined. */
989  if (st->internal->avctx->ticks_per_frame > 1 && !pc)
990  *pnum = *pden = 0;
991  }
992  break;
993  case AVMEDIA_TYPE_AUDIO:
994  if (st->internal->avctx_inited) {
995  frame_size = av_get_audio_frame_duration(st->internal->avctx, pkt->size);
996  sample_rate = st->internal->avctx->sample_rate;
997  } else {
998  frame_size = av_get_audio_frame_duration2(st->codecpar, pkt->size);
999  sample_rate = st->codecpar->sample_rate;
1000  }
1001  if (frame_size <= 0 || sample_rate <= 0)
1002  break;
1003  *pnum = frame_size;
1004  *pden = sample_rate;
1005  break;
1006  default:
1007  break;
1008  }
1009 }
1010 
1011 static int is_intra_only(enum AVCodecID id)
1012 {
1014  if (!d)
1015  return 0;
1017  return 0;
1018  return 1;
1019 }
1020 
1022 {
1023  if (st->codecpar->codec_id != AV_CODEC_ID_H264) return 1;
1024  if (!st->info) // if we have left find_stream_info then nb_decoded_frames won't increase anymore for stream copy
1025  return 1;
1026 #if CONFIG_H264_DECODER
1027  if (st->internal->avctx->has_b_frames &&
1029  return 1;
1030 #endif
1031  if (st->internal->avctx->has_b_frames<3)
1032  return st->nb_decoded_frames >= 7;
1033  else if (st->internal->avctx->has_b_frames<4)
1034  return st->nb_decoded_frames >= 18;
1035  else
1036  return st->nb_decoded_frames >= 20;
1037 }
1038 
1039 static AVPacketList *get_next_pkt(AVFormatContext *s, AVStream *st, AVPacketList *pktl)
1040 {
1041  if (pktl->next)
1042  return pktl->next;
1043  if (pktl == s->internal->packet_buffer_end)
1044  return s->internal->parse_queue;
1045  return NULL;
1046 }
1047 
1048 static int64_t select_from_pts_buffer(AVStream *st, int64_t *pts_buffer, int64_t dts) {
1049  int onein_oneout = st->codecpar->codec_id != AV_CODEC_ID_H264 &&
1051 
1052  if(!onein_oneout) {
1053  int delay = st->internal->avctx->has_b_frames;
1054  int i;
1055 
1056  if (dts == AV_NOPTS_VALUE) {
1057  int64_t best_score = INT64_MAX;
1058  for (i = 0; i<delay; i++) {
1059  if (st->pts_reorder_error_count[i]) {
1060  int64_t score = st->pts_reorder_error[i] / st->pts_reorder_error_count[i];
1061  if (score < best_score) {
1062  best_score = score;
1063  dts = pts_buffer[i];
1064  }
1065  }
1066  }
1067  } else {
1068  for (i = 0; i<delay; i++) {
1069  if (pts_buffer[i] != AV_NOPTS_VALUE) {
1070  int64_t diff = FFABS(pts_buffer[i] - dts)
1071  + (uint64_t)st->pts_reorder_error[i];
1072  diff = FFMAX(diff, st->pts_reorder_error[i]);
1073  st->pts_reorder_error[i] = diff;
1074  st->pts_reorder_error_count[i]++;
1075  if (st->pts_reorder_error_count[i] > 250) {
1076  st->pts_reorder_error[i] >>= 1;
1077  st->pts_reorder_error_count[i] >>= 1;
1078  }
1079  }
1080  }
1081  }
1082  }
1083 
1084  if (dts == AV_NOPTS_VALUE)
1085  dts = pts_buffer[0];
1086 
1087  return dts;
1088 }
1089 
1090 /**
1091  * Updates the dts of packets of a stream in pkt_buffer, by re-ordering the pts
1092  * of the packets in a window.
1093  */
1094 static void update_dts_from_pts(AVFormatContext *s, int stream_index,
1095  AVPacketList *pkt_buffer)
1096 {
1097  AVStream *st = s->streams[stream_index];
1098  int delay = st->internal->avctx->has_b_frames;
1099  int i;
1100 
1101  int64_t pts_buffer[MAX_REORDER_DELAY+1];
1102 
1103  for (i = 0; i<MAX_REORDER_DELAY+1; i++)
1104  pts_buffer[i] = AV_NOPTS_VALUE;
1105 
1106  for (; pkt_buffer; pkt_buffer = get_next_pkt(s, st, pkt_buffer)) {
1107  if (pkt_buffer->pkt.stream_index != stream_index)
1108  continue;
1109 
1110  if (pkt_buffer->pkt.pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
1111  pts_buffer[0] = pkt_buffer->pkt.pts;
1112  for (i = 0; i<delay && pts_buffer[i] > pts_buffer[i + 1]; i++)
1113  FFSWAP(int64_t, pts_buffer[i], pts_buffer[i + 1]);
1114 
1115  pkt_buffer->pkt.dts = select_from_pts_buffer(st, pts_buffer, pkt_buffer->pkt.dts);
1116  }
1117  }
1118 }
1119 
1120 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
1121  int64_t dts, int64_t pts, AVPacket *pkt)
1122 {
1123  AVStream *st = s->streams[stream_index];
1125  AVPacketList *pktl_it;
1126 
1127  uint64_t shift;
1128 
1129  if (st->first_dts != AV_NOPTS_VALUE ||
1130  dts == AV_NOPTS_VALUE ||
1131  st->cur_dts == AV_NOPTS_VALUE ||
1132  st->cur_dts < INT_MIN + RELATIVE_TS_BASE ||
1133  is_relative(dts))
1134  return;
1135 
1136  st->first_dts = dts - (st->cur_dts - RELATIVE_TS_BASE);
1137  st->cur_dts = dts;
1138  shift = (uint64_t)st->first_dts - RELATIVE_TS_BASE;
1139 
1140  if (is_relative(pts))
1141  pts += shift;
1142 
1143  for (pktl_it = pktl; pktl_it; pktl_it = get_next_pkt(s, st, pktl_it)) {
1144  if (pktl_it->pkt.stream_index != stream_index)
1145  continue;
1146  if (is_relative(pktl_it->pkt.pts))
1147  pktl_it->pkt.pts += shift;
1148 
1149  if (is_relative(pktl_it->pkt.dts))
1150  pktl_it->pkt.dts += shift;
1151 
1152  if (st->start_time == AV_NOPTS_VALUE && pktl_it->pkt.pts != AV_NOPTS_VALUE) {
1153  st->start_time = pktl_it->pkt.pts;
1156  }
1157  }
1158 
1160  update_dts_from_pts(s, stream_index, pktl);
1161  }
1162 
1163  if (st->start_time == AV_NOPTS_VALUE) {
1164  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO || !(pkt->flags & AV_PKT_FLAG_DISCARD)) {
1165  st->start_time = pts;
1166  }
1167  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && st->codecpar->sample_rate)
1168  st->start_time += av_rescale_q(st->skip_samples, (AVRational){1, st->codecpar->sample_rate}, st->time_base);
1169  }
1170 }
1171 
1172 static void update_initial_durations(AVFormatContext *s, AVStream *st,
1173  int stream_index, int duration)
1174 {
1176  int64_t cur_dts = RELATIVE_TS_BASE;
1177 
1178  if (st->first_dts != AV_NOPTS_VALUE) {
1180  return;
1182  cur_dts = st->first_dts;
1183  for (; pktl; pktl = get_next_pkt(s, st, pktl)) {
1184  if (pktl->pkt.stream_index == stream_index) {
1185  if (pktl->pkt.pts != pktl->pkt.dts ||
1186  pktl->pkt.dts != AV_NOPTS_VALUE ||
1187  pktl->pkt.duration)
1188  break;
1189  cur_dts -= duration;
1190  }
1191  }
1192  if (pktl && pktl->pkt.dts != st->first_dts) {
1193  av_log(s, AV_LOG_DEBUG, "first_dts %s not matching first dts %s (pts %s, duration %"PRId64") in the queue\n",
1194  av_ts2str(st->first_dts), av_ts2str(pktl->pkt.dts), av_ts2str(pktl->pkt.pts), pktl->pkt.duration);
1195  return;
1196  }
1197  if (!pktl) {
1198  av_log(s, AV_LOG_DEBUG, "first_dts %s but no packet with dts in the queue\n", av_ts2str(st->first_dts));
1199  return;
1200  }
1202  st->first_dts = cur_dts;
1203  } else if (st->cur_dts != RELATIVE_TS_BASE)
1204  return;
1205 
1206  for (; pktl; pktl = get_next_pkt(s, st, pktl)) {
1207  if (pktl->pkt.stream_index != stream_index)
1208  continue;
1209  if ((pktl->pkt.pts == pktl->pkt.dts ||
1210  pktl->pkt.pts == AV_NOPTS_VALUE) &&
1211  (pktl->pkt.dts == AV_NOPTS_VALUE ||
1212  pktl->pkt.dts == st->first_dts ||
1213  pktl->pkt.dts == RELATIVE_TS_BASE) &&
1214  !pktl->pkt.duration) {
1215  pktl->pkt.dts = cur_dts;
1216  if (!st->internal->avctx->has_b_frames)
1217  pktl->pkt.pts = cur_dts;
1218 // if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
1219  pktl->pkt.duration = duration;
1220  } else
1221  break;
1222  cur_dts = pktl->pkt.dts + pktl->pkt.duration;
1223  }
1224  if (!pktl)
1225  st->cur_dts = cur_dts;
1226 }
1227 
1228 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
1230  int64_t next_dts, int64_t next_pts)
1231 {
1232  int num, den, presentation_delayed, delay, i;
1233  int64_t offset;
1235  int onein_oneout = st->codecpar->codec_id != AV_CODEC_ID_H264 &&
1237 
1238  if (s->flags & AVFMT_FLAG_NOFILLIN)
1239  return;
1240 
1241  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && pkt->dts != AV_NOPTS_VALUE) {
1242  if (pkt->dts == pkt->pts && st->last_dts_for_order_check != AV_NOPTS_VALUE) {
1243  if (st->last_dts_for_order_check <= pkt->dts) {
1244  st->dts_ordered++;
1245  } else {
1247  "DTS %"PRIi64" < %"PRIi64" out of order\n",
1248  pkt->dts,
1250  st->dts_misordered++;
1251  }
1252  if (st->dts_ordered + st->dts_misordered > 250) {
1253  st->dts_ordered >>= 1;
1254  st->dts_misordered >>= 1;
1255  }
1256  }
1257 
1258  st->last_dts_for_order_check = pkt->dts;
1259  if (st->dts_ordered < 8*st->dts_misordered && pkt->dts == pkt->pts)
1260  pkt->dts = AV_NOPTS_VALUE;
1261  }
1262 
1263  if ((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
1264  pkt->dts = AV_NOPTS_VALUE;
1265 
1266  if (pc && pc->pict_type == AV_PICTURE_TYPE_B
1267  && !st->internal->avctx->has_b_frames)
1268  //FIXME Set low_delay = 0 when has_b_frames = 1
1269  st->internal->avctx->has_b_frames = 1;
1270 
1271  /* do we have a video B-frame ? */
1272  delay = st->internal->avctx->has_b_frames;
1273  presentation_delayed = 0;
1274 
1275  /* XXX: need has_b_frame, but cannot get it if the codec is
1276  * not initialized */
1277  if (delay &&
1278  pc && pc->pict_type != AV_PICTURE_TYPE_B)
1279  presentation_delayed = 1;
1280 
1281  if (pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE &&
1282  st->pts_wrap_bits < 63 &&
1283  pkt->dts - (1LL << (st->pts_wrap_bits - 1)) > pkt->pts) {
1284  if (is_relative(st->cur_dts) || pkt->dts - (1LL<<(st->pts_wrap_bits - 1)) > st->cur_dts) {
1285  pkt->dts -= 1LL << st->pts_wrap_bits;
1286  } else
1287  pkt->pts += 1LL << st->pts_wrap_bits;
1288  }
1289 
1290  /* Some MPEG-2 in MPEG-PS lack dts (issue #171 / input_file.mpg).
1291  * We take the conservative approach and discard both.
1292  * Note: If this is misbehaving for an H.264 file, then possibly
1293  * presentation_delayed is not set correctly. */
1294  if (delay == 1 && pkt->dts == pkt->pts &&
1295  pkt->dts != AV_NOPTS_VALUE && presentation_delayed) {
1296  av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination %"PRIi64"\n", pkt->dts);
1297  if ( strcmp(s->iformat->name, "mov,mp4,m4a,3gp,3g2,mj2")
1298  && strcmp(s->iformat->name, "flv")) // otherwise we discard correct timestamps for vc1-wmapro.ism
1299  pkt->dts = AV_NOPTS_VALUE;
1300  }
1301 
1302  duration = av_mul_q((AVRational) {pkt->duration, 1}, st->time_base);
1303  if (pkt->duration == 0) {
1304  ff_compute_frame_duration(s, &num, &den, st, pc, pkt);
1305  if (den && num) {
1306  duration = (AVRational) {num, den};
1307  pkt->duration = av_rescale_rnd(1,
1308  num * (int64_t) st->time_base.den,
1309  den * (int64_t) st->time_base.num,
1310  AV_ROUND_DOWN);
1311  }
1312  }
1313 
1314  if (pkt->duration != 0 && (s->internal->packet_buffer || s->internal->parse_queue))
1315  update_initial_durations(s, st, pkt->stream_index, pkt->duration);
1316 
1317  /* Correct timestamps with byte offset if demuxers only have timestamps
1318  * on packet boundaries */
1319  if (pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size) {
1320  /* this will estimate bitrate based on this frame's duration and size */
1321  offset = av_rescale(pc->offset, pkt->duration, pkt->size);
1322  if (pkt->pts != AV_NOPTS_VALUE)
1323  pkt->pts += offset;
1324  if (pkt->dts != AV_NOPTS_VALUE)
1325  pkt->dts += offset;
1326  }
1327 
1328  /* This may be redundant, but it should not hurt. */
1329  if (pkt->dts != AV_NOPTS_VALUE &&
1330  pkt->pts != AV_NOPTS_VALUE &&
1331  pkt->pts > pkt->dts)
1332  presentation_delayed = 1;
1333 
1334  if (s->debug & FF_FDEBUG_TS)
1335  av_log(s, AV_LOG_TRACE,
1336  "IN delayed:%d pts:%s, dts:%s cur_dts:%s st:%d pc:%p duration:%"PRId64" delay:%d onein_oneout:%d\n",
1337  presentation_delayed, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts),
1338  pkt->stream_index, pc, pkt->duration, delay, onein_oneout);
1339 
1340  /* Interpolate PTS and DTS if they are not present. We skip H264
1341  * currently because delay and has_b_frames are not reliably set. */
1342  if ((delay == 0 || (delay == 1 && pc)) &&
1343  onein_oneout) {
1344  if (presentation_delayed) {
1345  /* DTS = decompression timestamp */
1346  /* PTS = presentation timestamp */
1347  if (pkt->dts == AV_NOPTS_VALUE)
1348  pkt->dts = st->last_IP_pts;
1349  update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts, pkt);
1350  if (pkt->dts == AV_NOPTS_VALUE)
1351  pkt->dts = st->cur_dts;
1352 
1353  /* This is tricky: the dts must be incremented by the duration
1354  * of the frame we are displaying, i.e. the last I- or P-frame. */
1355  if (st->last_IP_duration == 0)
1356  st->last_IP_duration = pkt->duration;
1357  if (pkt->dts != AV_NOPTS_VALUE)
1358  st->cur_dts = pkt->dts + st->last_IP_duration;
1359  if (pkt->dts != AV_NOPTS_VALUE &&
1360  pkt->pts == AV_NOPTS_VALUE &&
1361  st->last_IP_duration > 0 &&
1362  ((uint64_t)st->cur_dts - (uint64_t)next_dts + 1) <= 2 &&
1363  next_dts != next_pts &&
1364  next_pts != AV_NOPTS_VALUE)
1365  pkt->pts = next_dts;
1366 
1367  st->last_IP_duration = pkt->duration;
1368  st->last_IP_pts = pkt->pts;
1369  /* Cannot compute PTS if not present (we can compute it only
1370  * by knowing the future. */
1371  } else if (pkt->pts != AV_NOPTS_VALUE ||
1372  pkt->dts != AV_NOPTS_VALUE ||
1373  pkt->duration ) {
1374 
1375  /* presentation is not delayed : PTS and DTS are the same */
1376  if (pkt->pts == AV_NOPTS_VALUE)
1377  pkt->pts = pkt->dts;
1379  pkt->pts, pkt);
1380  if (pkt->pts == AV_NOPTS_VALUE)
1381  pkt->pts = st->cur_dts;
1382  pkt->dts = pkt->pts;
1383  if (pkt->pts != AV_NOPTS_VALUE)
1384  st->cur_dts = av_add_stable(st->time_base, pkt->pts, duration, 1);
1385  }
1386  }
1387 
1388  if (pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
1389  st->pts_buffer[0] = pkt->pts;
1390  for (i = 0; i<delay && st->pts_buffer[i] > st->pts_buffer[i + 1]; i++)
1391  FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i + 1]);
1392 
1394  pkt->dts = select_from_pts_buffer(st, st->pts_buffer, pkt->dts);
1395  }
1396  // We skipped it above so we try here.
1397  if (!onein_oneout)
1398  // This should happen on the first packet
1399  update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts, pkt);
1400  if (pkt->dts > st->cur_dts)
1401  st->cur_dts = pkt->dts;
1402 
1403  if (s->debug & FF_FDEBUG_TS)
1404  av_log(s, AV_LOG_TRACE, "OUTdelayed:%d/%d pts:%s, dts:%s cur_dts:%s\n",
1405  presentation_delayed, delay, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts));
1406 
1407  /* update flags */
1408  if (is_intra_only(st->codecpar->codec_id))
1409  pkt->flags |= AV_PKT_FLAG_KEY;
1410 #if FF_API_CONVERGENCE_DURATION
1412  if (pc)
1415 #endif
1416 }
1417 
1418 void ff_packet_list_free(AVPacketList **pkt_buf, AVPacketList **pkt_buf_end)
1419 {
1420  AVPacketList *tmp = *pkt_buf;
1421 
1422  while (tmp) {
1423  AVPacketList *pktl = tmp;
1424  tmp = pktl->next;
1425  av_packet_unref(&pktl->pkt);
1426  av_freep(&pktl);
1427  }
1428  *pkt_buf = NULL;
1429  *pkt_buf_end = NULL;
1430 }
1431 
1432 /**
1433  * Parse a packet, add all split parts to parse_queue.
1434  *
1435  * @param pkt Packet to parse, NULL when flushing the parser at end of stream.
1436  */
1437 static int parse_packet(AVFormatContext *s, AVPacket *pkt, int stream_index)
1438 {
1439  AVPacket out_pkt = { 0 }, flush_pkt = { 0 };
1440  AVStream *st = s->streams[stream_index];
1441  uint8_t *data = pkt ? pkt->data : NULL;
1442  int size = pkt ? pkt->size : 0;
1443  int ret = 0, got_output = 0;
1444 
1445  if (!pkt) {
1447  pkt = &flush_pkt;
1448  got_output = 1;
1449  } else if (!size && st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) {
1450  // preserve 0-size sync packets
1452  }
1453 
1454  while (size > 0 || (pkt == &flush_pkt && got_output)) {
1455  int len;
1456  int64_t next_pts = pkt->pts;
1457  int64_t next_dts = pkt->dts;
1458 
1459  av_init_packet(&out_pkt);
1460  len = av_parser_parse2(st->parser, st->internal->avctx,
1461  &out_pkt.data, &out_pkt.size, data, size,
1462  pkt->pts, pkt->dts, pkt->pos);
1463 
1464  pkt->pts = pkt->dts = AV_NOPTS_VALUE;
1465  pkt->pos = -1;
1466  /* increment read pointer */
1467  data += len;
1468  size -= len;
1469 
1470  got_output = !!out_pkt.size;
1471 
1472  if (!out_pkt.size)
1473  continue;
1474 
1475  if (pkt->buf && out_pkt.data == pkt->data) {
1476  /* reference pkt->buf only when out_pkt.data is guaranteed to point
1477  * to data in it and not in the parser's internal buffer. */
1478  /* XXX: Ensure this is the case with all parsers when st->parser->flags
1479  * is PARSER_FLAG_COMPLETE_FRAMES and check for that instead? */
1480  out_pkt.buf = av_buffer_ref(pkt->buf);
1481  if (!out_pkt.buf) {
1482  ret = AVERROR(ENOMEM);
1483  goto fail;
1484  }
1485  } else {
1486  ret = av_packet_make_refcounted(&out_pkt);
1487  if (ret < 0)
1488  goto fail;
1489  }
1490 
1491  if (pkt->side_data) {
1492  out_pkt.side_data = pkt->side_data;
1493  out_pkt.side_data_elems = pkt->side_data_elems;
1494  pkt->side_data = NULL;
1495  pkt->side_data_elems = 0;
1496  }
1497 
1498  /* set the duration */
1499  out_pkt.duration = (st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) ? pkt->duration : 0;
1501  if (st->internal->avctx->sample_rate > 0) {
1502  out_pkt.duration =
1504  (AVRational) { 1, st->internal->avctx->sample_rate },
1505  st->time_base,
1506  AV_ROUND_DOWN);
1507  }
1508  }
1509 
1510  out_pkt.stream_index = st->index;
1511  out_pkt.pts = st->parser->pts;
1512  out_pkt.dts = st->parser->dts;
1513  out_pkt.pos = st->parser->pos;
1514  out_pkt.flags |= pkt->flags & AV_PKT_FLAG_DISCARD;
1515 
1517  out_pkt.pos = st->parser->frame_offset;
1518 
1519  if (st->parser->key_frame == 1 ||
1520  (st->parser->key_frame == -1 &&
1522  out_pkt.flags |= AV_PKT_FLAG_KEY;
1523 
1524  if (st->parser->key_frame == -1 && st->parser->pict_type ==AV_PICTURE_TYPE_NONE && (pkt->flags&AV_PKT_FLAG_KEY))
1525  out_pkt.flags |= AV_PKT_FLAG_KEY;
1526 
1527  compute_pkt_fields(s, st, st->parser, &out_pkt, next_dts, next_pts);
1528 
1531  &out_pkt, 0);
1532  if (ret < 0) {
1533  av_packet_unref(&out_pkt);
1534  goto fail;
1535  }
1536  }
1537 
1538  /* end of the stream => close and free the parser */
1539  if (pkt == &flush_pkt) {
1540  av_parser_close(st->parser);
1541  st->parser = NULL;
1542  }
1543 
1544 fail:
1546  return ret;
1547 }
1548 
1550  AVPacketList **pkt_buffer_end,
1551  AVPacket *pkt)
1552 {
1553  AVPacketList *pktl;
1554  av_assert0(*pkt_buffer);
1555  pktl = *pkt_buffer;
1556  *pkt = pktl->pkt;
1557  *pkt_buffer = pktl->next;
1558  if (!pktl->next)
1559  *pkt_buffer_end = NULL;
1560  av_freep(&pktl);
1561  return 0;
1562 }
1563 
1564 static int64_t ts_to_samples(AVStream *st, int64_t ts)
1565 {
1566  return av_rescale(ts, st->time_base.num * st->codecpar->sample_rate, st->time_base.den);
1567 }
1568 
1569 static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1570 {
1571  int ret = 0, i, got_packet = 0;
1572  AVDictionary *metadata = NULL;
1573 
1574  av_init_packet(pkt);
1575 
1576  while (!got_packet && !s->internal->parse_queue) {
1577  AVStream *st;
1578  AVPacket cur_pkt;
1579 
1580  /* read next packet */
1581  ret = ff_read_packet(s, &cur_pkt);
1582  if (ret < 0) {
1583  if (ret == AVERROR(EAGAIN))
1584  return ret;
1585  /* flush the parsers */
1586  for (i = 0; i < s->nb_streams; i++) {
1587  st = s->streams[i];
1588  if (st->parser && st->need_parsing)
1589  parse_packet(s, NULL, st->index);
1590  }
1591  /* all remaining packets are now in parse_queue =>
1592  * really terminate parsing */
1593  break;
1594  }
1595  ret = 0;
1596  st = s->streams[cur_pkt.stream_index];
1597 
1598  /* update context if required */
1599  if (st->internal->need_context_update) {
1600  if (avcodec_is_open(st->internal->avctx)) {
1601  av_log(s, AV_LOG_DEBUG, "Demuxer context update while decoder is open, closing and trying to re-open\n");
1603  st->info->found_decoder = 0;
1604  }
1605 
1606  /* close parser, because it depends on the codec */
1607  if (st->parser && st->internal->avctx->codec_id != st->codecpar->codec_id) {
1608  av_parser_close(st->parser);
1609  st->parser = NULL;
1610  }
1611 
1613  if (ret < 0)
1614  return ret;
1615 
1616 #if FF_API_LAVF_AVCTX
1618  /* update deprecated public codec context */
1619  ret = avcodec_parameters_to_context(st->codec, st->codecpar);
1620  if (ret < 0)
1621  return ret;
1623 #endif
1624 
1625  st->internal->need_context_update = 0;
1626  }
1627 
1628  if (cur_pkt.pts != AV_NOPTS_VALUE &&
1629  cur_pkt.dts != AV_NOPTS_VALUE &&
1630  cur_pkt.pts < cur_pkt.dts) {
1632  "Invalid timestamps stream=%d, pts=%s, dts=%s, size=%d\n",
1633  cur_pkt.stream_index,
1634  av_ts2str(cur_pkt.pts),
1635  av_ts2str(cur_pkt.dts),
1636  cur_pkt.size);
1637  }
1638  if (s->debug & FF_FDEBUG_TS)
1639  av_log(s, AV_LOG_DEBUG,
1640  "ff_read_packet stream=%d, pts=%s, dts=%s, size=%d, duration=%"PRId64", flags=%d\n",
1641  cur_pkt.stream_index,
1642  av_ts2str(cur_pkt.pts),
1643  av_ts2str(cur_pkt.dts),
1644  cur_pkt.size, cur_pkt.duration, cur_pkt.flags);
1645 
1646  if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1647  st->parser = av_parser_init(st->codecpar->codec_id);
1648  if (!st->parser) {
1649  av_log(s, AV_LOG_VERBOSE, "parser not found for codec "
1650  "%s, packets or times may be invalid.\n",
1652  /* no parser available: just output the raw packets */
1654  } else if (st->need_parsing == AVSTREAM_PARSE_HEADERS)
1656  else if (st->need_parsing == AVSTREAM_PARSE_FULL_ONCE)
1657  st->parser->flags |= PARSER_FLAG_ONCE;
1658  else if (st->need_parsing == AVSTREAM_PARSE_FULL_RAW)
1660  }
1661 
1662  if (!st->need_parsing || !st->parser) {
1663  /* no parsing needed: we just output the packet as is */
1664  *pkt = cur_pkt;
1666  if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1667  (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1668  ff_reduce_index(s, st->index);
1669  av_add_index_entry(st, pkt->pos, pkt->dts,
1670  0, 0, AVINDEX_KEYFRAME);
1671  }
1672  got_packet = 1;
1673  } else if (st->discard < AVDISCARD_ALL) {
1674  if ((ret = parse_packet(s, &cur_pkt, cur_pkt.stream_index)) < 0)
1675  return ret;
1677  st->codecpar->bit_rate = st->internal->avctx->bit_rate;
1678  st->codecpar->channels = st->internal->avctx->channels;
1680  st->codecpar->codec_id = st->internal->avctx->codec_id;
1681  } else {
1682  /* free packet */
1683  av_packet_unref(&cur_pkt);
1684  }
1685  if (pkt->flags & AV_PKT_FLAG_KEY)
1686  st->skip_to_keyframe = 0;
1687  if (st->skip_to_keyframe) {
1688  av_packet_unref(&cur_pkt);
1689  if (got_packet) {
1690  *pkt = cur_pkt;
1691  }
1692  got_packet = 0;
1693  }
1694  }
1695 
1696  if (!got_packet && s->internal->parse_queue)
1698 
1699  if (ret >= 0) {
1700  AVStream *st = s->streams[pkt->stream_index];
1701  int discard_padding = 0;
1702  if (st->first_discard_sample && pkt->pts != AV_NOPTS_VALUE) {
1703  int64_t pts = pkt->pts - (is_relative(pkt->pts) ? RELATIVE_TS_BASE : 0);
1704  int64_t sample = ts_to_samples(st, pts);
1705  int duration = ts_to_samples(st, pkt->duration);
1706  int64_t end_sample = sample + duration;
1707  if (duration > 0 && end_sample >= st->first_discard_sample &&
1708  sample < st->last_discard_sample)
1709  discard_padding = FFMIN(end_sample - st->first_discard_sample, duration);
1710  }
1711  if (st->start_skip_samples && (pkt->pts == 0 || pkt->pts == RELATIVE_TS_BASE))
1712  st->skip_samples = st->start_skip_samples;
1713  if (st->skip_samples || discard_padding) {
1715  if (p) {
1716  AV_WL32(p, st->skip_samples);
1717  AV_WL32(p + 4, discard_padding);
1718  av_log(s, AV_LOG_DEBUG, "demuxer injecting skip %d / discard %d\n", st->skip_samples, discard_padding);
1719  }
1720  st->skip_samples = 0;
1721  }
1722 
1723  if (st->inject_global_side_data) {
1724  for (i = 0; i < st->nb_side_data; i++) {
1725  AVPacketSideData *src_sd = &st->side_data[i];
1726  uint8_t *dst_data;
1727 
1728  if (av_packet_get_side_data(pkt, src_sd->type, NULL))
1729  continue;
1730 
1731  dst_data = av_packet_new_side_data(pkt, src_sd->type, src_sd->size);
1732  if (!dst_data) {
1733  av_log(s, AV_LOG_WARNING, "Could not inject global side data\n");
1734  continue;
1735  }
1736 
1737  memcpy(dst_data, src_sd->data, src_sd->size);
1738  }
1739  st->inject_global_side_data = 0;
1740  }
1741  }
1742 
1743  av_opt_get_dict_val(s, "metadata", AV_OPT_SEARCH_CHILDREN, &metadata);
1744  if (metadata) {
1746  av_dict_copy(&s->metadata, metadata, 0);
1747  av_dict_free(&metadata);
1749  }
1750 
1751 #if FF_API_LAVF_AVCTX
1753 #endif
1754 
1755  if (s->debug & FF_FDEBUG_TS)
1756  av_log(s, AV_LOG_DEBUG,
1757  "read_frame_internal stream=%d, pts=%s, dts=%s, "
1758  "size=%d, duration=%"PRId64", flags=%d\n",
1759  pkt->stream_index,
1760  av_ts2str(pkt->pts),
1761  av_ts2str(pkt->dts),
1762  pkt->size, pkt->duration, pkt->flags);
1763 
1764  return ret;
1765 }
1766 
1767 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1768 {
1769  const int genpts = s->flags & AVFMT_FLAG_GENPTS;
1770  int eof = 0;
1771  int ret;
1772  AVStream *st;
1773 
1774  if (!genpts) {
1775  ret = s->internal->packet_buffer
1777  &s->internal->packet_buffer_end, pkt)
1778  : read_frame_internal(s, pkt);
1779  if (ret < 0)
1780  return ret;
1781  goto return_packet;
1782  }
1783 
1784  for (;;) {
1785  AVPacketList *pktl = s->internal->packet_buffer;
1786 
1787  if (pktl) {
1788  AVPacket *next_pkt = &pktl->pkt;
1789 
1790  if (next_pkt->dts != AV_NOPTS_VALUE) {
1791  int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1792  // last dts seen for this stream. if any of packets following
1793  // current one had no dts, we will set this to AV_NOPTS_VALUE.
1794  int64_t last_dts = next_pkt->dts;
1795  av_assert2(wrap_bits <= 64);
1796  while (pktl && next_pkt->pts == AV_NOPTS_VALUE) {
1797  if (pktl->pkt.stream_index == next_pkt->stream_index &&
1798  av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2ULL << (wrap_bits - 1)) < 0) {
1799  if (av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2ULL << (wrap_bits - 1))) {
1800  // not B-frame
1801  next_pkt->pts = pktl->pkt.dts;
1802  }
1803  if (last_dts != AV_NOPTS_VALUE) {
1804  // Once last dts was set to AV_NOPTS_VALUE, we don't change it.
1805  last_dts = pktl->pkt.dts;
1806  }
1807  }
1808  pktl = pktl->next;
1809  }
1810  if (eof && next_pkt->pts == AV_NOPTS_VALUE && last_dts != AV_NOPTS_VALUE) {
1811  // Fixing the last reference frame had none pts issue (For MXF etc).
1812  // We only do this when
1813  // 1. eof.
1814  // 2. we are not able to resolve a pts value for current packet.
1815  // 3. the packets for this stream at the end of the files had valid dts.
1816  next_pkt->pts = last_dts + next_pkt->duration;
1817  }
1818  pktl = s->internal->packet_buffer;
1819  }
1820 
1821  /* read packet from packet buffer, if there is data */
1822  st = s->streams[next_pkt->stream_index];
1823  if (!(next_pkt->pts == AV_NOPTS_VALUE && st->discard < AVDISCARD_ALL &&
1824  next_pkt->dts != AV_NOPTS_VALUE && !eof)) {
1826  &s->internal->packet_buffer_end, pkt);
1827  goto return_packet;
1828  }
1829  }
1830 
1831  ret = read_frame_internal(s, pkt);
1832  if (ret < 0) {
1833  if (pktl && ret != AVERROR(EAGAIN)) {
1834  eof = 1;
1835  continue;
1836  } else
1837  return ret;
1838  }
1839 
1843  av_packet_unref(pkt);
1844  if (ret < 0)
1845  return ret;
1846  }
1847 
1848 return_packet:
1849 
1850  st = s->streams[pkt->stream_index];
1851  if ((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY) {
1852  ff_reduce_index(s, st->index);
1853  av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1854  }
1855 
1856  if (is_relative(pkt->dts))
1857  pkt->dts -= RELATIVE_TS_BASE;
1858  if (is_relative(pkt->pts))
1859  pkt->pts -= RELATIVE_TS_BASE;
1860 
1861  return ret;
1862 }
1863 
1864 /* XXX: suppress the packet queue */
1865 static void flush_packet_queue(AVFormatContext *s)
1866 {
1867  if (!s->internal)
1868  return;
1872 
1874 }
1875 
1876 /*******************************************************/
1877 /* seek support */
1878 
1879 int av_find_default_stream_index(AVFormatContext *s)
1880 {
1881  int i;
1882  AVStream *st;
1883  int best_stream = 0;
1884  int best_score = INT_MIN;
1885 
1886  if (s->nb_streams <= 0)
1887  return -1;
1888  for (i = 0; i < s->nb_streams; i++) {
1889  int score = 0;
1890  st = s->streams[i];
1891  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1893  score -= 400;
1894  if (st->codecpar->width && st->codecpar->height)
1895  score += 50;
1896  score+= 25;
1897  }
1898  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
1899  if (st->codecpar->sample_rate)
1900  score += 50;
1901  }
1902  if (st->codec_info_nb_frames)
1903  score += 12;
1904 
1905  if (st->discard != AVDISCARD_ALL)
1906  score += 200;
1907 
1908  if (score > best_score) {
1909  best_score = score;
1910  best_stream = i;
1911  }
1912  }
1913  return best_stream;
1914 }
1915 
1916 /** Flush the frame reader. */
1917 void ff_read_frame_flush(AVFormatContext *s)
1918 {
1919  AVStream *st;
1920  int i, j;
1921 
1922  flush_packet_queue(s);
1923 
1924  /* Reset read state for each stream. */
1925  for (i = 0; i < s->nb_streams; i++) {
1926  st = s->streams[i];
1927 
1928  if (st->parser) {
1929  av_parser_close(st->parser);
1930  st->parser = NULL;
1931  }
1934  if (st->first_dts == AV_NOPTS_VALUE)
1935  st->cur_dts = RELATIVE_TS_BASE;
1936  else
1937  /* We set the current DTS to an unspecified origin. */
1938  st->cur_dts = AV_NOPTS_VALUE;
1939 
1941 
1942  for (j = 0; j < MAX_REORDER_DELAY + 1; j++)
1943  st->pts_buffer[j] = AV_NOPTS_VALUE;
1944 
1946  st->inject_global_side_data = 1;
1947 
1948  st->skip_samples = 0;
1949  }
1950 }
1951 
1952 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
1953 {
1954  int i;
1955 
1956  for (i = 0; i < s->nb_streams; i++) {
1957  AVStream *st = s->streams[i];
1958 
1959  st->cur_dts =
1960  av_rescale(timestamp,
1961  st->time_base.den * (int64_t) ref_st->time_base.num,
1962  st->time_base.num * (int64_t) ref_st->time_base.den);
1963  }
1964 }
1965 
1966 void ff_reduce_index(AVFormatContext *s, int stream_index)
1967 {
1968  AVStream *st = s->streams[stream_index];
1969  unsigned int max_entries = s->max_index_size / sizeof(AVIndexEntry);
1970 
1971  if ((unsigned) st->nb_index_entries >= max_entries) {
1972  int i;
1973  for (i = 0; 2 * i < st->nb_index_entries; i++)
1974  st->index_entries[i] = st->index_entries[2 * i];
1975  st->nb_index_entries = i;
1976  }
1977 }
1978 
1979 int ff_add_index_entry(AVIndexEntry **index_entries,
1980  int *nb_index_entries,
1981  unsigned int *index_entries_allocated_size,
1982  int64_t pos, int64_t timestamp,
1983  int size, int distance, int flags)
1984 {
1985  AVIndexEntry *entries, *ie;
1986  int index;
1987 
1988  if ((unsigned) *nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1989  return -1;
1990 
1991  if (timestamp == AV_NOPTS_VALUE)
1992  return AVERROR(EINVAL);
1993 
1994  if (size < 0 || size > 0x3FFFFFFF)
1995  return AVERROR(EINVAL);
1996 
1997  if (is_relative(timestamp)) //FIXME this maintains previous behavior but we should shift by the correct offset once known
1998  timestamp -= RELATIVE_TS_BASE;
1999 
2000  entries = av_fast_realloc(*index_entries,
2001  index_entries_allocated_size,
2002  (*nb_index_entries + 1) *
2003  sizeof(AVIndexEntry));
2004  if (!entries)
2005  return -1;
2006 
2007  *index_entries = entries;
2008 
2009  index = ff_index_search_timestamp(*index_entries, *nb_index_entries,
2010  timestamp, AVSEEK_FLAG_ANY);
2011 
2012  if (index < 0) {
2013  index = (*nb_index_entries)++;
2014  ie = &entries[index];
2015  av_assert0(index == 0 || ie[-1].timestamp < timestamp);
2016  } else {
2017  ie = &entries[index];
2018  if (ie->timestamp != timestamp) {
2019  if (ie->timestamp <= timestamp)
2020  return -1;
2021  memmove(entries + index + 1, entries + index,
2022  sizeof(AVIndexEntry) * (*nb_index_entries - index));
2023  (*nb_index_entries)++;
2024  } else if (ie->pos == pos && distance < ie->min_distance)
2025  // do not reduce the distance
2026  distance = ie->min_distance;
2027  }
2028 
2029  ie->pos = pos;
2030  ie->timestamp = timestamp;
2031  ie->min_distance = distance;
2032  ie->size = size;
2033  ie->flags = flags;
2034 
2035  return index;
2036 }
2037 
2038 int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp,
2039  int size, int distance, int flags)
2040 {
2041  timestamp = wrap_timestamp(st, timestamp);
2043  &st->index_entries_allocated_size, pos,
2044  timestamp, size, distance, flags);
2045 }
2046 
2047 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
2048  int64_t wanted_timestamp, int flags)
2049 {
2050  int a, b, m;
2051  int64_t timestamp;
2052 
2053  a = -1;
2054  b = nb_entries;
2055 
2056  // Optimize appending index entries at the end.
2057  if (b && entries[b - 1].timestamp < wanted_timestamp)
2058  a = b - 1;
2059 
2060  while (b - a > 1) {
2061  m = (a + b) >> 1;
2062 
2063  // Search for the next non-discarded packet.
2064  while ((entries[m].flags & AVINDEX_DISCARD_FRAME) && m < b && m < nb_entries - 1) {
2065  m++;
2066  if (m == b && entries[m].timestamp >= wanted_timestamp) {
2067  m = b - 1;
2068  break;
2069  }
2070  }
2071 
2072  timestamp = entries[m].timestamp;
2073  if (timestamp >= wanted_timestamp)
2074  b = m;
2075  if (timestamp <= wanted_timestamp)
2076  a = m;
2077  }
2078  m = (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
2079 
2080  if (!(flags & AVSEEK_FLAG_ANY))
2081  while (m >= 0 && m < nb_entries &&
2082  !(entries[m].flags & AVINDEX_KEYFRAME))
2083  m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
2084 
2085  if (m == nb_entries)
2086  return -1;
2087  return m;
2088 }
2089 
2090 void ff_configure_buffers_for_index(AVFormatContext *s, int64_t time_tolerance)
2091 {
2092  int ist1, ist2;
2093  int64_t pos_delta = 0;
2094  int64_t skip = 0;
2095  //We could use URLProtocol flags here but as many user applications do not use URLProtocols this would be unreliable
2096  const char *proto = avio_find_protocol_name(s->url);
2097 
2098  if (!proto) {
2099  av_log(s, AV_LOG_INFO,
2100  "Protocol name not provided, cannot determine if input is local or "
2101  "a network protocol, buffers and access patterns cannot be configured "
2102  "optimally without knowing the protocol\n");
2103  }
2104 
2105  if (proto && !(strcmp(proto, "file") && strcmp(proto, "pipe") && strcmp(proto, "cache")))
2106  return;
2107 
2108  for (ist1 = 0; ist1 < s->nb_streams; ist1++) {
2109  AVStream *st1 = s->streams[ist1];
2110  for (ist2 = 0; ist2 < s->nb_streams; ist2++) {
2111  AVStream *st2 = s->streams[ist2];
2112  int i1, i2;
2113 
2114  if (ist1 == ist2)
2115  continue;
2116 
2117  for (i1 = i2 = 0; i1 < st1->nb_index_entries; i1++) {
2118  AVIndexEntry *e1 = &st1->index_entries[i1];
2119  int64_t e1_pts = av_rescale_q(e1->timestamp, st1->time_base, AV_TIME_BASE_Q);
2120 
2121  skip = FFMAX(skip, e1->size);
2122  for (; i2 < st2->nb_index_entries; i2++) {
2123  AVIndexEntry *e2 = &st2->index_entries[i2];
2124  int64_t e2_pts = av_rescale_q(e2->timestamp, st2->time_base, AV_TIME_BASE_Q);
2125  if (e2_pts - e1_pts < time_tolerance)
2126  continue;
2127  pos_delta = FFMAX(pos_delta, e1->pos - e2->pos);
2128  break;
2129  }
2130  }
2131  }
2132  }
2133 
2134  pos_delta *= 2;
2135  /* XXX This could be adjusted depending on protocol*/
2136  if (s->pb->buffer_size < pos_delta && pos_delta < (1<<24)) {
2137  av_log(s, AV_LOG_VERBOSE, "Reconfiguring buffers to size %"PRId64"\n", pos_delta);
2138  ffio_set_buf_size(s->pb, pos_delta);
2139  s->pb->short_seek_threshold = FFMAX(s->pb->short_seek_threshold, pos_delta/2);
2140  }
2141 
2142  if (skip < (1<<23)) {
2144  }
2145 }
2146 
2147 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp, int flags)
2148 {
2150  wanted_timestamp, flags);
2151 }
2152 
2153 static int64_t ff_read_timestamp(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit,
2154  int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
2155 {
2156  int64_t ts = read_timestamp(s, stream_index, ppos, pos_limit);
2157  if (stream_index >= 0)
2158  ts = wrap_timestamp(s->streams[stream_index], ts);
2159  return ts;
2160 }
2161 
2162 int ff_seek_frame_binary(AVFormatContext *s, int stream_index,
2163  int64_t target_ts, int flags)
2164 {
2165  AVInputFormat *avif = s->iformat;
2166  int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
2167  int64_t ts_min, ts_max, ts;
2168  int index;
2169  int64_t ret;
2170  AVStream *st;
2171 
2172  if (stream_index < 0)
2173  return -1;
2174 
2175  av_log(s, AV_LOG_TRACE, "read_seek: %d %s\n", stream_index, av_ts2str(target_ts));
2176 
2177  ts_max =
2178  ts_min = AV_NOPTS_VALUE;
2179  pos_limit = -1; // GCC falsely says it may be uninitialized.
2180 
2181  st = s->streams[stream_index];
2182  if (st->index_entries) {
2183  AVIndexEntry *e;
2184 
2185  /* FIXME: Whole function must be checked for non-keyframe entries in
2186  * index case, especially read_timestamp(). */
2187  index = av_index_search_timestamp(st, target_ts,
2188  flags | AVSEEK_FLAG_BACKWARD);
2189  index = FFMAX(index, 0);
2190  e = &st->index_entries[index];
2191 
2192  if (e->timestamp <= target_ts || e->pos == e->min_distance) {
2193  pos_min = e->pos;
2194  ts_min = e->timestamp;
2195  av_log(s, AV_LOG_TRACE, "using cached pos_min=0x%"PRIx64" dts_min=%s\n",
2196  pos_min, av_ts2str(ts_min));
2197  } else {
2198  av_assert1(index == 0);
2199  }
2200 
2201  index = av_index_search_timestamp(st, target_ts,
2202  flags & ~AVSEEK_FLAG_BACKWARD);
2203  av_assert0(index < st->nb_index_entries);
2204  if (index >= 0) {
2205  e = &st->index_entries[index];
2206  av_assert1(e->timestamp >= target_ts);
2207  pos_max = e->pos;
2208  ts_max = e->timestamp;
2209  pos_limit = pos_max - e->min_distance;
2210  av_log(s, AV_LOG_TRACE, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64
2211  " dts_max=%s\n", pos_max, pos_limit, av_ts2str(ts_max));
2212  }
2213  }
2214 
2215  pos = ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit,
2216  ts_min, ts_max, flags, &ts, avif->read_timestamp);
2217  if (pos < 0)
2218  return -1;
2219 
2220  /* do the seek */
2221  if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
2222  return ret;
2223 
2225  ff_update_cur_dts(s, st, ts);
2226 
2227  return 0;
2228 }
2229 
2230 int ff_find_last_ts(AVFormatContext *s, int stream_index, int64_t *ts, int64_t *pos,
2231  int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
2232 {
2233  int64_t step = 1024;
2234  int64_t limit, ts_max;
2235  int64_t filesize = avio_size(s->pb);
2236  int64_t pos_max = filesize - 1;
2237  do {
2238  limit = pos_max;
2239  pos_max = FFMAX(0, (pos_max) - step);
2240  ts_max = ff_read_timestamp(s, stream_index,
2241  &pos_max, limit, read_timestamp);
2242  step += step;
2243  } while (ts_max == AV_NOPTS_VALUE && 2*limit > step);
2244  if (ts_max == AV_NOPTS_VALUE)
2245  return -1;
2246 
2247  for (;;) {
2248  int64_t tmp_pos = pos_max + 1;
2249  int64_t tmp_ts = ff_read_timestamp(s, stream_index,
2250  &tmp_pos, INT64_MAX, read_timestamp);
2251  if (tmp_ts == AV_NOPTS_VALUE)
2252  break;
2253  av_assert0(tmp_pos > pos_max);
2254  ts_max = tmp_ts;
2255  pos_max = tmp_pos;
2256  if (tmp_pos >= filesize)
2257  break;
2258  }
2259 
2260  if (ts)
2261  *ts = ts_max;
2262  if (pos)
2263  *pos = pos_max;
2264 
2265  return 0;
2266 }
2267 
2268 int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
2269  int64_t pos_min, int64_t pos_max, int64_t pos_limit,
2270  int64_t ts_min, int64_t ts_max,
2271  int flags, int64_t *ts_ret,
2272  int64_t (*read_timestamp)(struct AVFormatContext *, int,
2273  int64_t *, int64_t))
2274 {
2275  int64_t pos, ts;
2276  int64_t start_pos;
2277  int no_change;
2278  int ret;
2279 
2280  av_log(s, AV_LOG_TRACE, "gen_seek: %d %s\n", stream_index, av_ts2str(target_ts));
2281 
2282  if (ts_min == AV_NOPTS_VALUE) {
2283  pos_min = s->internal->data_offset;
2284  ts_min = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
2285  if (ts_min == AV_NOPTS_VALUE)
2286  return -1;
2287  }
2288 
2289  if (ts_min >= target_ts) {
2290  *ts_ret = ts_min;
2291  return pos_min;
2292  }
2293 
2294  if (ts_max == AV_NOPTS_VALUE) {
2295  if ((ret = ff_find_last_ts(s, stream_index, &ts_max, &pos_max, read_timestamp)) < 0)
2296  return ret;
2297  pos_limit = pos_max;
2298  }
2299 
2300  if (ts_max <= target_ts) {
2301  *ts_ret = ts_max;
2302  return pos_max;
2303  }
2304 
2305  av_assert0(ts_min < ts_max);
2306 
2307  no_change = 0;
2308  while (pos_min < pos_limit) {
2309  av_log(s, AV_LOG_TRACE,
2310  "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%s dts_max=%s\n",
2311  pos_min, pos_max, av_ts2str(ts_min), av_ts2str(ts_max));
2312  av_assert0(pos_limit <= pos_max);
2313 
2314  if (no_change == 0) {
2315  int64_t approximate_keyframe_distance = pos_max - pos_limit;
2316  // interpolate position (better than dichotomy)
2317  pos = av_rescale(target_ts - ts_min, pos_max - pos_min,
2318  ts_max - ts_min) +
2319  pos_min - approximate_keyframe_distance;
2320  } else if (no_change == 1) {
2321  // bisection if interpolation did not change min / max pos last time
2322  pos = (pos_min + pos_limit) >> 1;
2323  } else {
2324  /* linear search if bisection failed, can only happen if there
2325  * are very few or no keyframes between min/max */
2326  pos = pos_min;
2327  }
2328  if (pos <= pos_min)
2329  pos = pos_min + 1;
2330  else if (pos > pos_limit)
2331  pos = pos_limit;
2332  start_pos = pos;
2333 
2334  // May pass pos_limit instead of -1.
2335  ts = ff_read_timestamp(s, stream_index, &pos, INT64_MAX, read_timestamp);
2336  if (pos == pos_max)
2337  no_change++;
2338  else
2339  no_change = 0;
2340  av_log(s, AV_LOG_TRACE, "%"PRId64" %"PRId64" %"PRId64" / %s %s %s"
2341  " target:%s limit:%"PRId64" start:%"PRId64" noc:%d\n",
2342  pos_min, pos, pos_max,
2343  av_ts2str(ts_min), av_ts2str(ts), av_ts2str(ts_max), av_ts2str(target_ts),
2344  pos_limit, start_pos, no_change);
2345  if (ts == AV_NOPTS_VALUE) {
2346  av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
2347  return -1;
2348  }
2349  if (target_ts <= ts) {
2350  pos_limit = start_pos - 1;
2351  pos_max = pos;
2352  ts_max = ts;
2353  }
2354  if (target_ts >= ts) {
2355  pos_min = pos;
2356  ts_min = ts;
2357  }
2358  }
2359 
2360  pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
2361  ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
2362 #if 0
2363  pos_min = pos;
2364  ts_min = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
2365  pos_min++;
2366  ts_max = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
2367  av_log(s, AV_LOG_TRACE, "pos=0x%"PRIx64" %s<=%s<=%s\n",
2368  pos, av_ts2str(ts_min), av_ts2str(target_ts), av_ts2str(ts_max));
2369 #endif
2370  *ts_ret = ts;
2371  return pos;
2372 }
2373 
2374 static int seek_frame_byte(AVFormatContext *s, int stream_index,
2375  int64_t pos, int flags)
2376 {
2377  int64_t pos_min, pos_max;
2378 
2379  pos_min = s->internal->data_offset;
2380  pos_max = avio_size(s->pb) - 1;
2381 
2382  if (pos < pos_min)
2383  pos = pos_min;
2384  else if (pos > pos_max)
2385  pos = pos_max;
2386 
2387  avio_seek(s->pb, pos, SEEK_SET);
2388 
2389  s->io_repositioned = 1;
2390 
2391  return 0;
2392 }
2393 
2394 static int seek_frame_generic(AVFormatContext *s, int stream_index,
2395  int64_t timestamp, int flags)
2396 {
2397  int index;
2398  int64_t ret;
2399  AVStream *st;
2400  AVIndexEntry *ie;
2401 
2402  st = s->streams[stream_index];
2403 
2404  index = av_index_search_timestamp(st, timestamp, flags);
2405 
2406  if (index < 0 && st->nb_index_entries &&
2407  timestamp < st->index_entries[0].timestamp)
2408  return -1;
2409 
2410  if (index < 0 || index == st->nb_index_entries - 1) {
2411  AVPacket pkt;
2412  int nonkey = 0;
2413 
2414  if (st->nb_index_entries) {
2416  ie = &st->index_entries[st->nb_index_entries - 1];
2417  if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
2418  return ret;
2419  ff_update_cur_dts(s, st, ie->timestamp);
2420  } else {
2421  if ((ret = avio_seek(s->pb, s->internal->data_offset, SEEK_SET)) < 0)
2422  return ret;
2423  }
2424  for (;;) {
2425  int read_status;
2426  do {
2427  read_status = av_read_frame(s, &pkt);
2428  } while (read_status == AVERROR(EAGAIN));
2429  if (read_status < 0)
2430  break;
2431  if (stream_index == pkt.stream_index && pkt.dts > timestamp) {
2432  if (pkt.flags & AV_PKT_FLAG_KEY) {
2433  av_packet_unref(&pkt);
2434  break;
2435  }
2436  if (nonkey++ > 1000 && st->codecpar->codec_id != AV_CODEC_ID_CDGRAPHICS) {
2437  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);
2438  av_packet_unref(&pkt);
2439  break;
2440  }
2441  }
2442  av_packet_unref(&pkt);
2443  }
2444  index = av_index_search_timestamp(st, timestamp, flags);
2445  }
2446  if (index < 0)
2447  return -1;
2448 
2450  if (s->iformat->read_seek)
2451  if (s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
2452  return 0;
2453  ie = &st->index_entries[index];
2454  if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
2455  return ret;
2456  ff_update_cur_dts(s, st, ie->timestamp);
2457 
2458  return 0;
2459 }
2460 
2461 static int seek_frame_internal(AVFormatContext *s, int stream_index,
2462  int64_t timestamp, int flags)
2463 {
2464  int ret;
2465  AVStream *st;
2466 
2467  if (flags & AVSEEK_FLAG_BYTE) {
2468  if (s->iformat->flags & AVFMT_NO_BYTE_SEEK)
2469  return -1;
2471  return seek_frame_byte(s, stream_index, timestamp, flags);
2472  }
2473 
2474  if (stream_index < 0) {
2475  stream_index = av_find_default_stream_index(s);
2476  if (stream_index < 0)
2477  return -1;
2478 
2479  st = s->streams[stream_index];
2480  /* timestamp for default must be expressed in AV_TIME_BASE units */
2481  timestamp = av_rescale(timestamp, st->time_base.den,
2482  AV_TIME_BASE * (int64_t) st->time_base.num);
2483  }
2484 
2485  /* first, we try the format specific seek */
2486  if (s->iformat->read_seek) {
2488  ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
2489  } else
2490  ret = -1;
2491  if (ret >= 0)
2492  return 0;
2493 
2494  if (s->iformat->read_timestamp &&
2495  !(s->iformat->flags & AVFMT_NOBINSEARCH)) {
2497  return ff_seek_frame_binary(s, stream_index, timestamp, flags);
2498  } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) {
2500  return seek_frame_generic(s, stream_index, timestamp, flags);
2501  } else
2502  return -1;
2503 }
2504 
2505 int av_seek_frame(AVFormatContext *s, int stream_index,
2506  int64_t timestamp, int flags)
2507 {
2508  int ret;
2509 
2510  if (s->iformat->read_seek2 && !s->iformat->read_seek) {
2511  int64_t min_ts = INT64_MIN, max_ts = INT64_MAX;
2512  if ((flags & AVSEEK_FLAG_BACKWARD))
2513  max_ts = timestamp;
2514  else
2515  min_ts = timestamp;
2516  return avformat_seek_file(s, stream_index, min_ts, timestamp, max_ts,
2517  flags & ~AVSEEK_FLAG_BACKWARD);
2518  }
2519 
2520  ret = seek_frame_internal(s, stream_index, timestamp, flags);
2521 
2522  if (ret >= 0)
2524 
2525  return ret;
2526 }
2527 
2528 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts,
2529  int64_t ts, int64_t max_ts, int flags)
2530 {
2531  if (min_ts > ts || max_ts < ts)
2532  return -1;
2533  if (stream_index < -1 || stream_index >= (int)s->nb_streams)
2534  return AVERROR(EINVAL);
2535 
2536  if (s->seek2any>0)
2537  flags |= AVSEEK_FLAG_ANY;
2538  flags &= ~AVSEEK_FLAG_BACKWARD;
2539 
2540  if (s->iformat->read_seek2) {
2541  int ret;
2543 
2544  if (stream_index == -1 && s->nb_streams == 1) {
2545  AVRational time_base = s->streams[0]->time_base;
2546  ts = av_rescale_q(ts, AV_TIME_BASE_Q, time_base);
2547  min_ts = av_rescale_rnd(min_ts, time_base.den,
2548  time_base.num * (int64_t)AV_TIME_BASE,
2550  max_ts = av_rescale_rnd(max_ts, time_base.den,
2551  time_base.num * (int64_t)AV_TIME_BASE,
2553  stream_index = 0;
2554  }
2555 
2556  ret = s->iformat->read_seek2(s, stream_index, min_ts,
2557  ts, max_ts, flags);
2558 
2559  if (ret >= 0)
2561  return ret;
2562  }
2563 
2564  if (s->iformat->read_timestamp) {
2565  // try to seek via read_timestamp()
2566  }
2567 
2568  // Fall back on old API if new is not implemented but old is.
2569  // Note the old API has somewhat different semantics.
2570  if (s->iformat->read_seek || 1) {
2571  int dir = (ts - (uint64_t)min_ts > (uint64_t)max_ts - ts ? AVSEEK_FLAG_BACKWARD : 0);
2572  int ret = av_seek_frame(s, stream_index, ts, flags | dir);
2573  if (ret<0 && ts != min_ts && max_ts != ts) {
2574  ret = av_seek_frame(s, stream_index, dir ? max_ts : min_ts, flags | dir);
2575  if (ret >= 0)
2576  ret = av_seek_frame(s, stream_index, ts, flags | (dir^AVSEEK_FLAG_BACKWARD));
2577  }
2578  return ret;
2579  }
2580 
2581  // try some generic seek like seek_frame_generic() but with new ts semantics
2582  return -1; //unreachable
2583 }
2584 
2585 int avformat_flush(AVFormatContext *s)
2586 {
2588  return 0;
2589 }
2590 
2591 /*******************************************************/
2592 
2593 /**
2594  * Return TRUE if the stream has accurate duration in any stream.
2595  *
2596  * @return TRUE if the stream has accurate duration for at least one component.
2597  */
2598 static int has_duration(AVFormatContext *ic)
2599 {
2600  int i;
2601  AVStream *st;
2602 
2603  for (i = 0; i < ic->nb_streams; i++) {
2604  st = ic->streams[i];
2605  if (st->duration != AV_NOPTS_VALUE)
2606  return 1;
2607  }
2608  if (ic->duration != AV_NOPTS_VALUE)
2609  return 1;
2610  return 0;
2611 }
2612 
2613 /**
2614  * Estimate the stream timings from the one of each components.
2615  *
2616  * Also computes the global bitrate if possible.
2617  */
2618 static void update_stream_timings(AVFormatContext *ic)
2619 {
2620  int64_t start_time, start_time1, start_time_text, end_time, end_time1, end_time_text;
2621  int64_t duration, duration1, duration_text, filesize;
2622  int i;
2623  AVProgram *p;
2624 
2625  start_time = INT64_MAX;
2626  start_time_text = INT64_MAX;
2627  end_time = INT64_MIN;
2628  end_time_text = INT64_MIN;
2629  duration = INT64_MIN;
2630  duration_text = INT64_MIN;
2631 
2632  for (i = 0; i < ic->nb_streams; i++) {
2633  AVStream *st = ic->streams[i];
2634  int is_text = st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE ||
2636  if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
2637  start_time1 = av_rescale_q(st->start_time, st->time_base,
2638  AV_TIME_BASE_Q);
2639  if (is_text)
2640  start_time_text = FFMIN(start_time_text, start_time1);
2641  else
2642  start_time = FFMIN(start_time, start_time1);
2643  end_time1 = av_rescale_q_rnd(st->duration, st->time_base,
2646  if (end_time1 != AV_NOPTS_VALUE && (end_time1 > 0 ? start_time1 <= INT64_MAX - end_time1 : start_time1 >= INT64_MIN - end_time1)) {
2647  end_time1 += start_time1;
2648  if (is_text)
2649  end_time_text = FFMAX(end_time_text, end_time1);
2650  else
2651  end_time = FFMAX(end_time, end_time1);
2652  }
2653  for (p = NULL; (p = av_find_program_from_stream(ic, p, i)); ) {
2654  if (p->start_time == AV_NOPTS_VALUE || p->start_time > start_time1)
2655  p->start_time = start_time1;
2656  if (p->end_time < end_time1)
2657  p->end_time = end_time1;
2658  }
2659  }
2660  if (st->duration != AV_NOPTS_VALUE) {
2661  duration1 = av_rescale_q(st->duration, st->time_base,
2662  AV_TIME_BASE_Q);
2663  if (is_text)
2664  duration_text = FFMAX(duration_text, duration1);
2665  else
2666  duration = FFMAX(duration, duration1);
2667  }
2668  }
2669  if (start_time == INT64_MAX || (start_time > start_time_text && start_time - start_time_text < AV_TIME_BASE))
2670  start_time = start_time_text;
2671  else if (start_time > start_time_text)
2672  av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream starttime %f\n", start_time_text / (float)AV_TIME_BASE);
2673 
2674  if (end_time == INT64_MIN || (end_time < end_time_text && end_time_text - (uint64_t)end_time < AV_TIME_BASE))
2675  end_time = end_time_text;
2676  else if (end_time < end_time_text)
2677  av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream endtime %f\n", end_time_text / (float)AV_TIME_BASE);
2678 
2679  if (duration == INT64_MIN || (duration < duration_text && duration_text - duration < AV_TIME_BASE))
2680  duration = duration_text;
2681  else if (duration < duration_text)
2682  av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream duration %f\n", duration_text / (float)AV_TIME_BASE);
2683 
2684  if (start_time != INT64_MAX) {
2685  ic->start_time = start_time;
2686  if (end_time != INT64_MIN) {
2687  if (ic->nb_programs > 1) {
2688  for (i = 0; i < ic->nb_programs; i++) {
2689  p = ic->programs[i];
2690  if (p->start_time != AV_NOPTS_VALUE &&
2691  p->end_time > p->start_time &&
2692  p->end_time - (uint64_t)p->start_time <= INT64_MAX)
2693  duration = FFMAX(duration, p->end_time - p->start_time);
2694  }
2695  } else if (end_time >= start_time && end_time - (uint64_t)start_time <= INT64_MAX) {
2696  duration = FFMAX(duration, end_time - start_time);
2697  }
2698  }
2699  }
2700  if (duration != INT64_MIN && duration > 0 && ic->duration == AV_NOPTS_VALUE) {
2701  ic->duration = duration;
2702  }
2703  if (ic->pb && (filesize = avio_size(ic->pb)) > 0 && ic->duration > 0) {
2704  /* compute the bitrate */
2705  double bitrate = (double) filesize * 8.0 * AV_TIME_BASE /
2706  (double) ic->duration;
2707  if (bitrate >= 0 && bitrate <= INT64_MAX)
2708  ic->bit_rate = bitrate;
2709  }
2710 }
2711 
2712 static void fill_all_stream_timings(AVFormatContext *ic)
2713 {
2714  int i;
2715  AVStream *st;
2716 
2718  for (i = 0; i < ic->nb_streams; i++) {
2719  st = ic->streams[i];
2720  if (st->start_time == AV_NOPTS_VALUE) {
2721  if (ic->start_time != AV_NOPTS_VALUE)
2723  st->time_base);
2724  if (ic->duration != AV_NOPTS_VALUE)
2726  st->time_base);
2727  }
2728  }
2729 }
2730 
2731 static void estimate_timings_from_bit_rate(AVFormatContext *ic)
2732 {
2733  int64_t filesize, duration;
2734  int i, show_warning = 0;
2735  AVStream *st;
2736 
2737  /* if bit_rate is already set, we believe it */
2738  if (ic->bit_rate <= 0) {
2739  int64_t bit_rate = 0;
2740  for (i = 0; i < ic->nb_streams; i++) {
2741  st = ic->streams[i];
2742  if (st->codecpar->bit_rate <= 0 && st->internal->avctx->bit_rate > 0)
2743  st->codecpar->bit_rate = st->internal->avctx->bit_rate;
2744  if (st->codecpar->bit_rate > 0) {
2745  if (INT64_MAX - st->codecpar->bit_rate < bit_rate) {
2746  bit_rate = 0;
2747  break;
2748  }
2749  bit_rate += st->codecpar->bit_rate;
2750  } else if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && st->codec_info_nb_frames > 1) {
2751  // If we have a videostream with packets but without a bitrate
2752  // then consider the sum not known
2753  bit_rate = 0;
2754  break;
2755  }
2756  }
2757  ic->bit_rate = bit_rate;
2758  }
2759 
2760  /* if duration is already set, we believe it */
2761  if (ic->duration == AV_NOPTS_VALUE &&
2762  ic->bit_rate != 0) {
2763  filesize = ic->pb ? avio_size(ic->pb) : 0;
2764  if (filesize > ic->internal->data_offset) {
2765  filesize -= ic->internal->data_offset;
2766  for (i = 0; i < ic->nb_streams; i++) {
2767  st = ic->streams[i];
2768  if ( st->time_base.num <= INT64_MAX / ic->bit_rate
2769  && st->duration == AV_NOPTS_VALUE) {
2770  duration = av_rescale(8 * filesize, st->time_base.den,
2771  ic->bit_rate *
2772  (int64_t) st->time_base.num);
2773  st->duration = duration;
2774  show_warning = 1;
2775  }
2776  }
2777  }
2778  }
2779  if (show_warning)
2780  av_log(ic, AV_LOG_WARNING,
2781  "Estimating duration from bitrate, this may be inaccurate\n");
2782 }
2783 
2784 #define DURATION_MAX_READ_SIZE 250000LL
2785 #define DURATION_MAX_RETRY 6
2786 
2787 /* only usable for MPEG-PS streams */
2788 static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
2789 {
2790  AVPacket pkt1, *pkt = &pkt1;
2791  AVStream *st;
2792  int num, den, read_size, i, ret;
2793  int found_duration = 0;
2794  int is_end;
2795  int64_t filesize, offset, duration;
2796  int retry = 0;
2797 
2798  /* flush packet queue */
2799  flush_packet_queue(ic);
2800 
2801  for (i = 0; i < ic->nb_streams; i++) {
2802  st = ic->streams[i];
2803  if (st->start_time == AV_NOPTS_VALUE &&
2804  st->first_dts == AV_NOPTS_VALUE &&
2806  av_log(ic, AV_LOG_WARNING,
2807  "start time for stream %d is not set in estimate_timings_from_pts\n", i);
2808 
2809  if (st->parser) {
2810  av_parser_close(st->parser);
2811  st->parser = NULL;
2812  }
2813  }
2814 
2816  av_log(ic, AV_LOG_INFO, "Skipping duration calculation in estimate_timings_from_pts\n");
2817  goto skip_duration_calc;
2818  }
2819 
2820  av_opt_set(ic, "skip_changes", "1", AV_OPT_SEARCH_CHILDREN);
2821  /* estimate the end time (duration) */
2822  /* XXX: may need to support wrapping */
2823  filesize = ic->pb ? avio_size(ic->pb) : 0;
2824  do {
2825  is_end = found_duration;
2826  offset = filesize - (DURATION_MAX_READ_SIZE << retry);
2827  if (offset < 0)
2828  offset = 0;
2829 
2830  avio_seek(ic->pb, offset, SEEK_SET);
2831  read_size = 0;
2832  for (;;) {
2833  if (read_size >= DURATION_MAX_READ_SIZE << (FFMAX(retry - 1, 0)))
2834  break;
2835 
2836  do {
2837  ret = ff_read_packet(ic, pkt);
2838  } while (ret == AVERROR(EAGAIN));
2839  if (ret != 0)
2840  break;
2841  read_size += pkt->size;
2842  st = ic->streams[pkt->stream_index];
2843  if (pkt->pts != AV_NOPTS_VALUE &&
2844  (st->start_time != AV_NOPTS_VALUE ||
2845  st->first_dts != AV_NOPTS_VALUE)) {
2846  if (pkt->duration == 0) {
2847  ff_compute_frame_duration(ic, &num, &den, st, st->parser, pkt);
2848  if (den && num) {
2849  pkt->duration = av_rescale_rnd(1,
2850  num * (int64_t) st->time_base.den,
2851  den * (int64_t) st->time_base.num,
2852  AV_ROUND_DOWN);
2853  }
2854  }
2855  duration = pkt->pts + pkt->duration;
2856  found_duration = 1;
2857  if (st->start_time != AV_NOPTS_VALUE)
2858  duration -= st->start_time;
2859  else
2860  duration -= st->first_dts;
2861  if (duration > 0) {
2862  if (st->duration == AV_NOPTS_VALUE || st->info->last_duration<= 0 ||
2863  (st->duration < duration && FFABS(duration - st->info->last_duration) < 60LL*st->time_base.den / st->time_base.num))
2864  st->duration = duration;
2865  st->info->last_duration = duration;
2866  }
2867  }
2868  av_packet_unref(pkt);
2869  }
2870 
2871  /* check if all audio/video streams have valid duration */
2872  if (!is_end) {
2873  is_end = 1;
2874  for (i = 0; i < ic->nb_streams; i++) {
2875  st = ic->streams[i];
2876  switch (st->codecpar->codec_type) {
2877  case AVMEDIA_TYPE_VIDEO:
2878  case AVMEDIA_TYPE_AUDIO:
2879  if (st->duration == AV_NOPTS_VALUE)
2880  is_end = 0;
2881  }
2882  }
2883  }
2884  } while (!is_end &&
2885  offset &&
2886  ++retry <= DURATION_MAX_RETRY);
2887 
2888  av_opt_set(ic, "skip_changes", "0", AV_OPT_SEARCH_CHILDREN);
2889 
2890  /* warn about audio/video streams which duration could not be estimated */
2891  for (i = 0; i < ic->nb_streams; i++) {
2892  st = ic->streams[i];
2893  if (st->duration == AV_NOPTS_VALUE) {
2894  switch (st->codecpar->codec_type) {
2895  case AVMEDIA_TYPE_VIDEO:
2896  case AVMEDIA_TYPE_AUDIO:
2897  if (st->start_time != AV_NOPTS_VALUE || st->first_dts != AV_NOPTS_VALUE) {
2898  av_log(ic, AV_LOG_DEBUG, "stream %d : no PTS found at end of file, duration not set\n", i);
2899  } else
2900  av_log(ic, AV_LOG_DEBUG, "stream %d : no TS found at start of file, duration not set\n", i);
2901  }
2902  }
2903  }
2904 skip_duration_calc:
2906 
2907  avio_seek(ic->pb, old_offset, SEEK_SET);
2908  for (i = 0; i < ic->nb_streams; i++) {
2909  int j;
2910 
2911  st = ic->streams[i];
2912  st->cur_dts = st->first_dts;
2915  for (j = 0; j < MAX_REORDER_DELAY + 1; j++)
2916  st->pts_buffer[j] = AV_NOPTS_VALUE;
2917  }
2918 }
2919 
2920 static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
2921 {
2922  int64_t file_size;
2923 
2924  /* get the file size, if possible */
2925  if (ic->iformat->flags & AVFMT_NOFILE) {
2926  file_size = 0;
2927  } else {
2928  file_size = avio_size(ic->pb);
2929  file_size = FFMAX(0, file_size);
2930  }
2931 
2932  if ((!strcmp(ic->iformat->name, "mpeg") ||
2933  !strcmp(ic->iformat->name, "mpegts")) &&
2934  file_size && (ic->pb->seekable & AVIO_SEEKABLE_NORMAL)) {
2935  /* get accurate estimate from the PTSes */
2936  estimate_timings_from_pts(ic, old_offset);
2938  } else if (has_duration(ic)) {
2939  /* at least one component has timings - we use them for all
2940  * the components */
2943  } else {
2944  /* less precise: use bitrate info */
2947  }
2949 
2950  {
2951  int i;
2952  AVStream av_unused *st;
2953  for (i = 0; i < ic->nb_streams; i++) {
2954  st = ic->streams[i];
2955  av_log(ic, AV_LOG_TRACE, "stream %d: start_time: %0.3f duration: %0.3f\n", i,
2956  (double) st->start_time * av_q2d(st->time_base),
2957  (double) st->duration * av_q2d(st->time_base));
2958  }
2959  av_log(ic, AV_LOG_TRACE,
2960  "format: start_time: %0.3f duration: %0.3f bitrate=%"PRId64" kb/s\n",
2961  (double) ic->start_time / AV_TIME_BASE,
2962  (double) ic->duration / AV_TIME_BASE,
2963  (int64_t)ic->bit_rate / 1000);
2964  }
2965 }
2966 
2967 static int has_codec_parameters(AVStream *st, const char **errmsg_ptr)
2968 {
2969  AVCodecContext *avctx = st->internal->avctx;
2970 
2971 #define FAIL(errmsg) do { \
2972  if (errmsg_ptr) \
2973  *errmsg_ptr = errmsg; \
2974  return 0; \
2975  } while (0)
2976 
2977  if ( avctx->codec_id == AV_CODEC_ID_NONE
2978  && avctx->codec_type != AVMEDIA_TYPE_DATA)
2979  FAIL("unknown codec");
2980  switch (avctx->codec_type) {
2981  case AVMEDIA_TYPE_AUDIO:
2982  if (!avctx->frame_size && determinable_frame_size(avctx))
2983  FAIL("unspecified frame size");
2984  if (st->info->found_decoder >= 0 &&
2985  avctx->sample_fmt == AV_SAMPLE_FMT_NONE)
2986  FAIL("unspecified sample format");
2987  if (!avctx->sample_rate)
2988  FAIL("unspecified sample rate");
2989  if (!avctx->channels)
2990  FAIL("unspecified number of channels");
2991  if (st->info->found_decoder >= 0 && !st->nb_decoded_frames && avctx->codec_id == AV_CODEC_ID_DTS)
2992  FAIL("no decodable DTS frames");
2993  break;
2994  case AVMEDIA_TYPE_VIDEO:
2995  if (!avctx->width)
2996  FAIL("unspecified size");
2997  if (st->info->found_decoder >= 0 && avctx->pix_fmt == AV_PIX_FMT_NONE)
2998  FAIL("unspecified pixel format");
3001  FAIL("no frame in rv30/40 and no sar");
3002  break;
3003  case AVMEDIA_TYPE_SUBTITLE:
3004  if (avctx->codec_id == AV_CODEC_ID_HDMV_PGS_SUBTITLE && !avctx->width)
3005  FAIL("unspecified size");
3006  break;
3007  case AVMEDIA_TYPE_DATA:
3008  if (avctx->codec_id == AV_CODEC_ID_NONE) return 1;
3009  }
3010 
3011  return 1;
3012 }
3013 
3014 /* returns 1 or 0 if or if not decoded data was returned, or a negative error */
3015 static int try_decode_frame(AVFormatContext *s, AVStream *st, AVPacket *avpkt,
3017 {
3018  AVCodecContext *avctx = st->internal->avctx;
3019  const AVCodec *codec;
3020  int got_picture = 1, ret = 0;
3022  AVSubtitle subtitle;
3023  AVPacket pkt = *avpkt;
3024  int do_skip_frame = 0;
3025  enum AVDiscard skip_frame;
3026 
3027  if (!frame)
3028  return AVERROR(ENOMEM);
3029 
3030  if (!avcodec_is_open(avctx) &&
3031  st->info->found_decoder <= 0 &&
3032  (st->codecpar->codec_id != -st->info->found_decoder || !st->codecpar->codec_id)) {
3033  AVDictionary *thread_opt = NULL;
3034 
3035  codec = find_probe_decoder(s, st, st->codecpar->codec_id);
3036 
3037  if (!codec) {
3038  st->info->found_decoder = -st->codecpar->codec_id;
3039  ret = -1;
3040  goto fail;
3041  }
3042 
3043  /* Force thread count to 1 since the H.264 decoder will not extract
3044  * SPS and PPS to extradata during multi-threaded decoding. */
3045  av_dict_set(options ? options : &thread_opt, "threads", "1", 0);
3046  if (s->codec_whitelist)
3047  av_dict_set(options ? options : &thread_opt, "codec_whitelist", s->codec_whitelist, 0);
3048  ret = avcodec_open2(avctx, codec, options ? options : &thread_opt);
3049  if (!options)
3050  av_dict_free(&thread_opt);
3051  if (ret < 0) {
3052  st->info->found_decoder = -avctx->codec_id;
3053  goto fail;
3054  }
3055  st->info->found_decoder = 1;
3056  } else if (!st->info->found_decoder)
3057  st->info->found_decoder = 1;
3058 
3059  if (st->info->found_decoder < 0) {
3060  ret = -1;
3061  goto fail;
3062  }
3063 
3065  do_skip_frame = 1;
3066  skip_frame = avctx->skip_frame;
3067  avctx->skip_frame = AVDISCARD_ALL;
3068  }
3069 
3070  while ((pkt.size > 0 || (!pkt.data && got_picture)) &&
3071  ret >= 0 &&
3073  (!st->codec_info_nb_frames &&
3075  got_picture = 0;
3076  if (avctx->codec_type == AVMEDIA_TYPE_VIDEO ||
3077  avctx->codec_type == AVMEDIA_TYPE_AUDIO) {
3078  ret = avcodec_send_packet(avctx, &pkt);
3079  if (ret < 0 && ret != AVERROR(EAGAIN) && ret != AVERROR_EOF)
3080  break;
3081  if (ret >= 0)
3082  pkt.size = 0;
3083  ret = avcodec_receive_frame(avctx, frame);
3084  if (ret >= 0)
3085  got_picture = 1;
3086  if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
3087  ret = 0;
3088  } else if (avctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
3089  ret = avcodec_decode_subtitle2(avctx, &subtitle,
3090  &got_picture, &pkt);
3091  if (ret >= 0)
3092  pkt.size = 0;
3093  }
3094  if (ret >= 0) {
3095  if (got_picture)
3096  st->nb_decoded_frames++;
3097  ret = got_picture;
3098  }
3099  }
3100 
3101  if (!pkt.data && !got_picture)
3102  ret = -1;
3103 
3104 fail:
3105  if (do_skip_frame) {
3106  avctx->skip_frame = skip_frame;
3107  }
3108 
3109  av_frame_free(&frame);
3110  return ret;
3111 }
3112 
3113 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
3114 {
3115  while (tags->id != AV_CODEC_ID_NONE) {
3116  if (tags->id == id)
3117  return tags->tag;
3118  tags++;
3119  }
3120  return 0;
3121 }
3122 
3123 enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
3124 {
3125  int i;
3126  for (i = 0; tags[i].id != AV_CODEC_ID_NONE; i++)
3127  if (tag == tags[i].tag)
3128  return tags[i].id;
3129  for (i = 0; tags[i].id != AV_CODEC_ID_NONE; i++)
3130  if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag))
3131  return tags[i].id;
3132  return AV_CODEC_ID_NONE;
3133 }
3134 
3135 enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags)
3136 {
3137  if (bps <= 0 || bps > 64)
3138  return AV_CODEC_ID_NONE;
3139 
3140  if (flt) {
3141  switch (bps) {
3142  case 32:
3144  case 64:
3146  default:
3147  return AV_CODEC_ID_NONE;
3148  }
3149  } else {
3150  bps += 7;
3151  bps >>= 3;
3152  if (sflags & (1 << (bps - 1))) {
3153  switch (bps) {
3154  case 1:
3155  return AV_CODEC_ID_PCM_S8;
3156  case 2:
3158  case 3:
3160  case 4:
3162  case 8:
3164  default:
3165  return AV_CODEC_ID_NONE;
3166  }
3167  } else {
3168  switch (bps) {
3169  case 1:
3170  return AV_CODEC_ID_PCM_U8;
3171  case 2:
3173  case 3:
3175  case 4:
3177  default:
3178  return AV_CODEC_ID_NONE;
3179  }
3180  }
3181  }
3182 }
3183 
3184 unsigned int av_codec_get_tag(const AVCodecTag *const *tags, enum AVCodecID id)
3185 {
3186  unsigned int tag;
3187  if (!av_codec_get_tag2(tags, id, &tag))
3188  return 0;
3189  return tag;
3190 }
3191 
3192 int av_codec_get_tag2(const AVCodecTag * const *tags, enum AVCodecID id,
3193  unsigned int *tag)
3194 {
3195  int i;
3196  for (i = 0; tags && tags[i]; i++) {
3197  const AVCodecTag *codec_tags = tags[i];
3198  while (codec_tags->id != AV_CODEC_ID_NONE) {
3199  if (codec_tags->id == id) {
3200  *tag = codec_tags->tag;
3201  return 1;
3202  }
3203  codec_tags++;
3204  }
3205  }
3206  return 0;
3207 }
3208 
3209 enum AVCodecID av_codec_get_id(const AVCodecTag *const *tags, unsigned int tag)
3210 {
3211  int i;
3212  for (i = 0; tags && tags[i]; i++) {
3213  enum AVCodecID id = ff_codec_get_id(tags[i], tag);
3214  if (id != AV_CODEC_ID_NONE)
3215  return id;
3216  }
3217  return AV_CODEC_ID_NONE;
3218 }
3219 
3220 static void compute_chapters_end(AVFormatContext *s)
3221 {
3222  unsigned int i, j;
3223  int64_t max_time = 0;
3224 
3225  if (s->duration > 0 && s->start_time < INT64_MAX - s->duration)
3226  max_time = s->duration +
3227  ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
3228 
3229  for (i = 0; i < s->nb_chapters; i++)
3230  if (s->chapters[i]->end == AV_NOPTS_VALUE) {
3231  AVChapter *ch = s->chapters[i];
3232  int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q,
3233  ch->time_base)
3234  : INT64_MAX;
3235 
3236  for (j = 0; j < s->nb_chapters; j++) {
3237  AVChapter *ch1 = s->chapters[j];
3238  int64_t next_start = av_rescale_q(ch1->start, ch1->time_base,
3239  ch->time_base);
3240  if (j != i && next_start > ch->start && next_start < end)
3241  end = next_start;
3242  }
3243  ch->end = (end == INT64_MAX || end < ch->start) ? ch->start : end;
3244  }
3245 }
3246 
3247 static int get_std_framerate(int i)
3248 {
3249  if (i < 30*12)
3250  return (i + 1) * 1001;
3251  i -= 30*12;
3252 
3253  if (i < 30)
3254  return (i + 31) * 1001 * 12;
3255  i -= 30;
3256 
3257  if (i < 3)
3258  return ((const int[]) { 80, 120, 240})[i] * 1001 * 12;
3259 
3260  i -= 3;
3261 
3262  return ((const int[]) { 24, 30, 60, 12, 15, 48 })[i] * 1000 * 12;
3263 }
3264 
3265 /* Is the time base unreliable?
3266  * This is a heuristic to balance between quick acceptance of the values in
3267  * the headers vs. some extra checks.
3268  * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
3269  * MPEG-2 commonly misuses field repeat flags to store different framerates.
3270  * And there are "variable" fps files this needs to detect as well. */
3272 {
3273  if (c->time_base.den >= 101LL * c->time_base.num ||
3274  c->time_base.den < 5LL * c->time_base.num ||
3275  // c->codec_tag == AV_RL32("DIVX") ||
3276  // c->codec_tag == AV_RL32("XVID") ||
3277  c->codec_tag == AV_RL32("mp4v") ||
3279  c->codec_id == AV_CODEC_ID_GIF ||
3280  c->codec_id == AV_CODEC_ID_HEVC ||
3281  c->codec_id == AV_CODEC_ID_H264)
3282  return 1;
3283  return 0;
3284 }
3285 
3287 {
3288  av_freep(&par->extradata);
3289  par->extradata_size = 0;
3290 
3292  return AVERROR(EINVAL);
3293 
3295  if (!par->extradata)
3296  return AVERROR(ENOMEM);
3297 
3298  memset(par->extradata + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3299  par->extradata_size = size;
3300 
3301  return 0;
3302 }
3303 
3304 int ff_get_extradata(AVFormatContext *s, AVCodecParameters *par, AVIOContext *pb, int size)
3305 {
3306  int ret = ff_alloc_extradata(par, size);
3307  if (ret < 0)
3308  return ret;
3309  ret = avio_read(pb, par->extradata, size);
3310  if (ret != size) {
3311  av_freep(&par->extradata);
3312  par->extradata_size = 0;
3313  av_log(s, AV_LOG_ERROR, "Failed to read extradata of size %d\n", size);
3314  return ret < 0 ? ret : AVERROR_INVALIDDATA;
3315  }
3316 
3317  return ret;
3318 }
3319 
3320 int ff_rfps_add_frame(AVFormatContext *ic, AVStream *st, int64_t ts)
3321 {
3322  int i, j;
3323  int64_t last = st->info->last_dts;
3324 
3325  if ( ts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && ts > last
3326  && ts - (uint64_t)last < INT64_MAX) {
3327  double dts = (is_relative(ts) ? ts - RELATIVE_TS_BASE : ts) * av_q2d(st->time_base);
3328  int64_t duration = ts - last;
3329 
3330  if (!st->info->duration_error)
3331  st->info->duration_error = av_mallocz(sizeof(st->info->duration_error[0])*2);
3332  if (!st->info->duration_error)
3333  return AVERROR(ENOMEM);
3334 
3335 // if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
3336 // av_log(NULL, AV_LOG_ERROR, "%f\n", dts);
3337  for (i = 0; i<MAX_STD_TIMEBASES; i++) {
3338  if (st->info->duration_error[0][1][i] < 1e10) {
3339  int framerate = get_std_framerate(i);
3340  double sdts = dts*framerate/(1001*12);
3341  for (j= 0; j<2; j++) {
3342  int64_t ticks = llrint(sdts+j*0.5);
3343  double error= sdts - ticks + j*0.5;
3344  st->info->duration_error[j][0][i] += error;
3345  st->info->duration_error[j][1][i] += error*error;
3346  }
3347  }
3348  }
3349  st->info->duration_count++;
3351 
3352  if (st->info->duration_count % 10 == 0) {
3353  int n = st->info->duration_count;
3354  for (i = 0; i<MAX_STD_TIMEBASES; i++) {
3355  if (st->info->duration_error[0][1][i] < 1e10) {
3356  double a0 = st->info->duration_error[0][0][i] / n;
3357  double error0 = st->info->duration_error[0][1][i] / n - a0*a0;
3358  double a1 = st->info->duration_error[1][0][i] / n;
3359  double error1 = st->info->duration_error[1][1][i] / n - a1*a1;
3360  if (error0 > 0.04 && error1 > 0.04) {
3361  st->info->duration_error[0][1][i] = 2e10;
3362  st->info->duration_error[1][1][i] = 2e10;
3363  }
3364  }
3365  }
3366  }
3367 
3368  // ignore the first 4 values, they might have some random jitter
3369  if (st->info->duration_count > 3 && is_relative(ts) == is_relative(last))
3370  st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
3371  }
3372  if (ts != AV_NOPTS_VALUE)
3373  st->info->last_dts = ts;
3374 
3375  return 0;
3376 }
3377 
3378 void ff_rfps_calculate(AVFormatContext *ic)
3379 {
3380  int i, j;
3381 
3382  for (i = 0; i < ic->nb_streams; i++) {
3383  AVStream *st = ic->streams[i];
3384 
3386  continue;
3387  // the check for tb_unreliable() is not completely correct, since this is not about handling
3388  // an unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
3389  // ipmovie.c produces.
3390  if (tb_unreliable(st->internal->avctx) && st->info->duration_count > 15 && st->info->duration_gcd > FFMAX(1, st->time_base.den/(500LL*st->time_base.num)) && !st->r_frame_rate.num)
3391  av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, st->time_base.den, st->time_base.num * st->info->duration_gcd, INT_MAX);
3392  if (st->info->duration_count>1 && !st->r_frame_rate.num
3393  && tb_unreliable(st->internal->avctx)) {
3394  int num = 0;
3395  double best_error= 0.01;
3396  AVRational ref_rate = st->r_frame_rate.num ? st->r_frame_rate : av_inv_q(st->time_base);
3397 
3398  for (j= 0; j<MAX_STD_TIMEBASES; j++) {
3399  int k;
3400 
3401  if (st->info->codec_info_duration &&
3402  st->info->codec_info_duration*av_q2d(st->time_base) < (1001*11.5)/get_std_framerate(j))
3403  continue;
3404  if (!st->info->codec_info_duration && get_std_framerate(j) < 1001*12)
3405  continue;
3406 
3407  if (av_q2d(st->time_base) * st->info->rfps_duration_sum / st->info->duration_count < (1001*12.0 * 0.8)/get_std_framerate(j))
3408  continue;
3409 
3410  for (k= 0; k<2; k++) {
3411  int n = st->info->duration_count;
3412  double a= st->info->duration_error[k][0][j] / n;
3413  double error= st->info->duration_error[k][1][j]/n - a*a;
3414 
3415  if (error < best_error && best_error> 0.000000001) {
3416  best_error= error;
3417  num = get_std_framerate(j);
3418  }
3419  if (error < 0.02)
3420  av_log(ic, AV_LOG_DEBUG, "rfps: %f %f\n", get_std_framerate(j) / 12.0/1001, error);
3421  }
3422  }
3423  // do not increase frame rate by more than 1 % in order to match a standard rate.
3424  if (num && (!ref_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(ref_rate)))
3425  av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
3426  }
3427  if ( !st->avg_frame_rate.num
3428  && st->r_frame_rate.num && st->info->rfps_duration_sum
3429  && st->info->codec_info_duration <= 0
3430  && st->info->duration_count > 2
3431  && fabs(1.0 / (av_q2d(st->r_frame_rate) * av_q2d(st->time_base)) - st->info->rfps_duration_sum / (double)st->info->duration_count) <= 1.0
3432  ) {
3433  av_log(ic, AV_LOG_DEBUG, "Setting avg frame rate based on r frame rate\n");
3434  st->avg_frame_rate = st->r_frame_rate;
3435  }
3436 
3437  av_freep(&st->info->duration_error);
3438  st->info->last_dts = AV_NOPTS_VALUE;
3439  st->info->duration_count = 0;
3440  st->info->rfps_duration_sum = 0;
3441  }
3442 }
3443 
3445 {
3446  const AVBitStreamFilter *f;
3447 
3448  f = av_bsf_get_by_name("extract_extradata");
3449  if (!f)
3450  return 0;
3451 
3452  if (f->codec_ids) {
3453  const enum AVCodecID *ids;
3454  for (ids = f->codec_ids; *ids != AV_CODEC_ID_NONE; ids++)
3455  if (*ids == st->codecpar->codec_id)
3456  return 1;
3457  }
3458 
3459  return 0;
3460 }
3461 
3463 {
3464  AVStreamInternal *i = st->internal;
3465  const AVBitStreamFilter *f;
3466  int ret;
3467 
3468  f = av_bsf_get_by_name("extract_extradata");
3469  if (!f)
3470  goto finish;
3471 
3472  /* check that the codec id is supported */
3473  ret = extract_extradata_check(st);
3474  if (!ret)
3475  goto finish;
3476 
3478  if (!i->extract_extradata.pkt)
3479  return AVERROR(ENOMEM);
3480 
3481  ret = av_bsf_alloc(f, &i->extract_extradata.bsf);
3482  if (ret < 0)
3483  goto fail;
3484 
3486  st->codecpar);
3487  if (ret < 0)
3488  goto fail;
3489 
3491 
3492  /* if init fails here, we assume extracting extradata is just not
3493  * supported for this codec, so we return success */
3494  ret = av_bsf_init(i->extract_extradata.bsf);
3495  if (ret < 0) {
3497  ret = 0;
3498  }
3499 
3500 finish:
3501  i->extract_extradata.inited = 1;
3502 
3503  return 0;
3504 fail:
3507  return ret;
3508 }
3509 
3511 {
3512  AVStreamInternal *i = st->internal;
3513  AVPacket *pkt_ref;
3514  int ret;
3515 
3516  if (!i->extract_extradata.inited) {
3517  ret = extract_extradata_init(st);
3518  if (ret < 0)
3519  return ret;
3520  }
3521 
3523  return 0;
3524 
3525  pkt_ref = i->extract_extradata.pkt;
3526  ret = av_packet_ref(pkt_ref, pkt);
3527  if (ret < 0)
3528  return ret;
3529 
3530  ret = av_bsf_send_packet(i->extract_extradata.bsf, pkt_ref);
3531  if (ret < 0) {
3532  av_packet_unref(pkt_ref);
3533  return ret;
3534  }
3535 
3536  while (ret >= 0 && !i->avctx->extradata) {
3537  int extradata_size;
3538  uint8_t *extradata;
3539 
3540  ret = av_bsf_receive_packet(i->extract_extradata.bsf, pkt_ref);
3541  if (ret < 0) {
3542  if (ret != AVERROR(EAGAIN) && ret != AVERROR_EOF)
3543  return ret;
3544  continue;
3545  }
3546 
3548  &extradata_size);
3549 
3550  if (extradata) {
3551  i->avctx->extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
3552  if (!i->avctx->extradata) {
3553  av_packet_unref(pkt_ref);
3554  return AVERROR(ENOMEM);
3555  }
3556  memcpy(i->avctx->extradata, extradata, extradata_size);
3557  i->avctx->extradata_size = extradata_size;
3558  }
3559  av_packet_unref(pkt_ref);
3560  }
3561 
3562  return 0;
3563 }
3564 
3566 {
3567  int i, count = 0, ret = 0, j;
3568  int64_t read_size;
3569  AVStream *st;
3570  AVCodecContext *avctx;
3571  AVPacket pkt1, *pkt;
3572  int64_t old_offset = avio_tell(ic->pb);
3573  // new streams might appear, no options for those
3574  int orig_nb_streams = ic->nb_streams;
3575  int flush_codecs;
3576  int64_t max_analyze_duration = ic->max_analyze_duration;
3577  int64_t max_stream_analyze_duration;
3578  int64_t max_subtitle_analyze_duration;
3579  int64_t probesize = ic->probesize;
3580  int eof_reached = 0;
3581  int *missing_streams = av_opt_ptr(ic->iformat->priv_class, ic->priv_data, "missing_streams");
3582 
3583  flush_codecs = probesize > 0;
3584 
3585  av_opt_set(ic, "skip_clear", "1", AV_OPT_SEARCH_CHILDREN);
3586 
3587  max_stream_analyze_duration = max_analyze_duration;
3588  max_subtitle_analyze_duration = max_analyze_duration;
3589  if (!max_analyze_duration) {
3590  max_stream_analyze_duration =
3591  max_analyze_duration = 5*AV_TIME_BASE;
3592  max_subtitle_analyze_duration = 30*AV_TIME_BASE;
3593  if (!strcmp(ic->iformat->name, "flv"))
3594  max_stream_analyze_duration = 90*AV_TIME_BASE;
3595  if (!strcmp(ic->iformat->name, "mpeg") || !strcmp(ic->iformat->name, "mpegts"))
3596  max_stream_analyze_duration = 7*AV_TIME_BASE;
3597  }
3598 
3599  if (ic->pb)
3600  av_log(ic, AV_LOG_DEBUG, "Before avformat_find_stream_info() pos: %"PRId64" bytes read:%"PRId64" seeks:%d nb_streams:%d\n",
3601  avio_tell(ic->pb), ic->pb->bytes_read, ic->pb->seek_count, ic->nb_streams);
3602 
3603  for (i = 0; i < ic->nb_streams; i++) {
3604  const AVCodec *codec;
3605  AVDictionary *thread_opt = NULL;
3606  st = ic->streams[i];
3607  avctx = st->internal->avctx;
3608 
3609  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO ||
3611 /* if (!st->time_base.num)
3612  st->time_base = */
3613  if (!avctx->time_base.num)
3614  avctx->time_base = st->time_base;
3615  }
3616 
3617  /* check if the caller has overridden the codec id */
3618 #if FF_API_LAVF_AVCTX
3620  if (st->codec->codec_id != st->internal->orig_codec_id) {
3621  st->codecpar->codec_id = st->codec->codec_id;
3622  st->codecpar->codec_type = st->codec->codec_type;
3623  st->internal->orig_codec_id = st->codec->codec_id;
3624  }
3626 #endif
3627  // only for the split stuff
3628  if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE) && st->request_probe <= 0) {
3629  st->parser = av_parser_init(st->codecpar->codec_id);
3630  if (st->parser) {
3631  if (st->need_parsing == AVSTREAM_PARSE_HEADERS) {
3633  } else if (st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
3635  }
3636  } else if (st->need_parsing) {
3637  av_log(ic, AV_LOG_VERBOSE, "parser not found for codec "
3638  "%s, packets or times may be invalid.\n",
3640  }
3641  }
3642 
3643  if (st->codecpar->codec_id != st->internal->orig_codec_id)
3645 
3646  ret = avcodec_parameters_to_context(avctx, st->codecpar);
3647  if (ret < 0)
3648  goto find_stream_info_err;
3649  if (st->request_probe <= 0)
3650  st->internal->avctx_inited = 1;
3651 
3652  codec = find_probe_decoder(ic, st, st->codecpar->codec_id);
3653 
3654  /* Force thread count to 1 since the H.264 decoder will not extract
3655  * SPS and PPS to extradata during multi-threaded decoding. */
3656  av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0);
3657 
3658  if (ic->codec_whitelist)
3659  av_dict_set(options ? &options[i] : &thread_opt, "codec_whitelist", ic->codec_whitelist, 0);
3660 
3661  /* Ensure that subtitle_header is properly set. */
3663  && codec && !avctx->codec) {
3664  if (avcodec_open2(avctx, codec, options ? &options[i] : &thread_opt) < 0)
3665  av_log(ic, AV_LOG_WARNING,
3666  "Failed to open codec in %s\n",__FUNCTION__);
3667  }
3668 
3669  // Try to just open decoders, in case this is enough to get parameters.
3670  if (!has_codec_parameters(st, NULL) && st->request_probe <= 0) {
3671  if (codec && !avctx->codec)
3672  if (avcodec_open2(avctx, codec, options ? &options[i] : &thread_opt) < 0)
3673  av_log(ic, AV_LOG_WARNING,
3674  "Failed to open codec in %s\n",__FUNCTION__);
3675  }
3676  if (!options)
3677  av_dict_free(&thread_opt);
3678  }
3679 
3680  for (i = 0; i < ic->nb_streams; i++) {
3681 #if FF_API_R_FRAME_RATE
3682  ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
3683 #endif
3686  }
3687 
3688  read_size = 0;
3689  for (;;) {
3690  int analyzed_all_streams;
3692  ret = AVERROR_EXIT;
3693  av_log(ic, AV_LOG_DEBUG, "interrupted\n");
3694  break;
3695  }
3696 
3697  /* check if one codec still needs to be handled */
3698  for (i = 0; i < ic->nb_streams; i++) {
3699  int fps_analyze_framecount = 20;
3700  int count;
3701 
3702  st = ic->streams[i];
3703  if (!has_codec_parameters(st, NULL))
3704  break;
3705  /* If the timebase is coarse (like the usual millisecond precision
3706  * of mkv), we need to analyze more frames to reliably arrive at
3707  * the correct fps. */
3708  if (av_q2d(st->time_base) > 0.0005)
3709  fps_analyze_framecount *= 2;
3710  if (!tb_unreliable(st->internal->avctx))
3711  fps_analyze_framecount = 0;
3712  if (ic->fps_probe_size >= 0)
3713  fps_analyze_framecount = ic->fps_probe_size;
3715  fps_analyze_framecount = 0;
3716  /* variable fps and no guess at the real fps */
3717  count = (ic->iformat->flags & AVFMT_NOTIMESTAMPS) ?
3719  st->info->duration_count;
3720  if (!(st->r_frame_rate.num && st->avg_frame_rate.num) &&
3722  if (count < fps_analyze_framecount)
3723  break;
3724  }
3725  // Look at the first 3 frames if there is evidence of frame delay
3726  // but the decoder delay is not set.
3727  if (st->info->frame_delay_evidence && count < 2 && st->internal->avctx->has_b_frames == 0)
3728  break;
3729  if (!st->internal->avctx->extradata &&
3731  st->internal->extract_extradata.bsf) &&
3733  break;
3734  if (st->first_dts == AV_NOPTS_VALUE &&
3735  !(ic->iformat->flags & AVFMT_NOTIMESTAMPS) &&
3739  break;
3740  }
3741  analyzed_all_streams = 0;
3742  if (!missing_streams || !*missing_streams)
3743  if (i == ic->nb_streams) {
3744  analyzed_all_streams = 1;
3745  /* NOTE: If the format has no header, then we need to read some
3746  * packets to get most of the streams, so we cannot stop here. */
3747  if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
3748  /* If we found the info for all the codecs, we can stop. */
3749  ret = count;
3750  av_log(ic, AV_LOG_DEBUG, "All info found\n");
3751  flush_codecs = 0;
3752  break;
3753  }
3754  }
3755  /* We did not get all the codec info, but we read too much data. */
3756  if (read_size >= probesize) {
3757  ret = count;
3758  av_log(ic, AV_LOG_DEBUG,
3759  "Probe buffer size limit of %"PRId64" bytes reached\n", probesize);
3760  for (i = 0; i < ic->nb_streams; i++)
3761  if (!ic->streams[i]->r_frame_rate.num &&
3762  ic->streams[i]->info->duration_count <= 1 &&
3764  strcmp(ic->iformat->name, "image2"))
3765  av_log(ic, AV_LOG_WARNING,
3766  "Stream #%d: not enough frames to estimate rate; "
3767  "consider increasing probesize\n", i);
3768  break;
3769  }
3770 
3771  /* NOTE: A new stream can be added there if no header in file
3772  * (AVFMTCTX_NOHEADER). */
3773  ret = read_frame_internal(ic, &pkt1);
3774  if (ret == AVERROR(EAGAIN))
3775  continue;
3776 
3777  if (ret < 0) {
3778  /* EOF or error*/
3779  eof_reached = 1;
3780  break;
3781  }
3782 
3783  pkt = &pkt1;
3784 
3785  if (!(ic->flags & AVFMT_FLAG_NOBUFFER)) {
3788  pkt, 0);
3789  if (ret < 0)
3790  goto find_stream_info_err;
3791  }
3792 
3793  st = ic->streams[pkt->stream_index];
3795  read_size += pkt->size;
3796 
3797  avctx = st->internal->avctx;
3798  if (!st->internal->avctx_inited) {
3799  ret = avcodec_parameters_to_context(avctx, st->codecpar);
3800  if (ret < 0)
3801  goto find_stream_info_err;
3802  st->internal->avctx_inited = 1;
3803  }
3804 
3805  if (pkt->dts != AV_NOPTS_VALUE && st->codec_info_nb_frames > 1) {
3806  /* check for non-increasing dts */
3807  if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
3808  st->info->fps_last_dts >= pkt->dts) {
3809  av_log(ic, AV_LOG_DEBUG,
3810  "Non-increasing DTS in stream %d: packet %d with DTS "
3811  "%"PRId64", packet %d with DTS %"PRId64"\n",
3812  st->index, st->info->fps_last_dts_idx,
3814  pkt->dts);
3815  st->info->fps_first_dts =
3817  }
3818  /* Check for a discontinuity in dts. If the difference in dts
3819  * is more than 1000 times the average packet duration in the
3820  * sequence, we treat it as a discontinuity. */
3821  if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
3823  (pkt->dts - st->info->fps_last_dts) / 1000 >
3824  (st->info->fps_last_dts - (uint64_t)st->info->fps_first_dts) /
3825  (st->info->fps_last_dts_idx - st->info->fps_first_dts_idx)) {
3826  av_log(ic, AV_LOG_WARNING,
3827  "DTS discontinuity in stream %d: packet %d with DTS "
3828  "%"PRId64", packet %d with DTS %"PRId64"\n",
3829  st->index, st->info->fps_last_dts_idx,
3831  pkt->dts);
3832  st->info->fps_first_dts =
3834  }
3835 
3836  /* update stored dts values */
3837  if (st->info->fps_first_dts == AV_NOPTS_VALUE) {
3838  st->info->fps_first_dts = pkt->dts;
3840  }
3841  st->info->fps_last_dts = pkt->dts;
3843  }
3844  if (st->codec_info_nb_frames>1) {
3845  int64_t t = 0;
3846  int64_t limit;
3847 
3848  if (st->time_base.den > 0)
3850  if (st->avg_frame_rate.num > 0)
3852 
3853  if ( t == 0
3854  && st->codec_info_nb_frames>30
3855  && st->info->fps_first_dts != AV_NOPTS_VALUE
3856  && st->info->fps_last_dts != AV_NOPTS_VALUE)
3858 
3859  if (analyzed_all_streams) limit = max_analyze_duration;
3860  else if (avctx->codec_type == AVMEDIA_TYPE_SUBTITLE) limit = max_subtitle_analyze_duration;
3861  else limit = max_stream_analyze_duration;
3862 
3863  if (t >= limit) {
3864  av_log(ic, AV_LOG_VERBOSE, "max_analyze_duration %"PRId64" reached at %"PRId64" microseconds st:%d\n",
3865  limit,
3866  t, pkt->stream_index);
3867  if (ic->flags & AVFMT_FLAG_NOBUFFER)
3868  av_packet_unref(pkt);
3869  break;
3870  }
3871  if (pkt->duration) {
3872  if (avctx->codec_type == AVMEDIA_TYPE_SUBTITLE && pkt->pts != AV_NOPTS_VALUE && pkt->pts >= st->start_time) {
3873  st->info->codec_info_duration = FFMIN(pkt->pts - st->start_time, st->info->codec_info_duration + pkt->duration);
3874  } else
3875  st->info->codec_info_duration += pkt->duration;
3876  st->info->codec_info_duration_fields += st->parser && st->need_parsing && avctx->ticks_per_frame ==2 ? st->parser->repeat_pict + 1 : 2;
3877  }
3878  }
3879  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
3880 #if FF_API_R_FRAME_RATE
3881  ff_rfps_add_frame(ic, st, pkt->dts);
3882 #endif
3883  if (pkt->dts != pkt->pts && pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE)
3884  st->info->frame_delay_evidence = 1;
3885  }
3886  if (!st->internal->avctx->extradata) {
3887  ret = extract_extradata(st, pkt);
3888  if (ret < 0)
3889  goto find_stream_info_err;
3890  }
3891 
3892  /* If still no information, we try to open the codec and to
3893  * decompress the frame. We try to avoid that in most cases as
3894  * it takes longer and uses more memory. For MPEG-4, we need to
3895  * decompress for QuickTime.
3896  *
3897  * If AV_CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
3898  * least one frame of codec data, this makes sure the codec initializes
3899  * the channel configuration and does not only trust the values from
3900  * the container. */
3901  try_decode_frame(ic, st, pkt,
3902  (options && i < orig_nb_streams) ? &options[i] : NULL);
3903 
3904  if (ic->flags & AVFMT_FLAG_NOBUFFER)
3905  av_packet_unref(pkt);
3906 
3907  st->codec_info_nb_frames++;
3908  count++;
3909  }
3910 
3911  if (eof_reached) {
3912  int stream_index;
3913  for (stream_index = 0; stream_index < ic->nb_streams; stream_index++) {
3914  st = ic->streams[stream_index];
3915  avctx = st->internal->avctx;
3916  if (!has_codec_parameters(st, NULL)) {
3917  const AVCodec *codec = find_probe_decoder(ic, st, st->codecpar->codec_id);
3918  if (codec && !avctx->codec) {
3919  AVDictionary *opts = NULL;
3920  if (ic->codec_whitelist)
3921  av_dict_set(&opts, "codec_whitelist", ic->codec_whitelist, 0);
3922  if (avcodec_open2(avctx, codec, (options && stream_index < orig_nb_streams) ? &options[stream_index] : &opts) < 0)
3923  av_log(ic, AV_LOG_WARNING,
3924  "Failed to open codec in %s\n",__FUNCTION__);
3925  av_dict_free(&opts);
3926  }
3927  }
3928 
3929  // EOF already reached while reading the stream above.
3930  // So continue with reoordering DTS with whatever delay we have.
3932  update_dts_from_pts(ic, stream_index, ic->internal->packet_buffer);
3933  }
3934  }
3935  }
3936 
3937  if (flush_codecs) {
3938  AVPacket empty_pkt = { 0 };
3939  int err = 0;
3940  av_init_packet(&empty_pkt);
3941 
3942  for (i = 0; i < ic->nb_streams; i++) {
3943 
3944  st = ic->streams[i];
3945 
3946  /* flush the decoders */
3947  if (st->info->found_decoder == 1) {
3948  do {
3949  err = try_decode_frame(ic, st, &empty_pkt,
3950  (options && i < orig_nb_streams)
3951  ? &options[i] : NULL);
3952  } while (err > 0 && !has_codec_parameters(st, NULL));
3953 
3954  if (err < 0) {
3955  av_log(ic, AV_LOG_INFO,
3956  "decoding for stream %d failed\n", st->index);
3957  }
3958  }
3959  }
3960  }
3961 
3962  ff_rfps_calculate(ic);
3963 
3964  for (i = 0; i < ic->nb_streams; i++) {
3965  st = ic->streams[i];
3966  avctx = st->internal->avctx;
3967  if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
3968  if (avctx->codec_id == AV_CODEC_ID_RAWVIDEO && !avctx->codec_tag && !avctx->bits_per_coded_sample) {
3969  uint32_t tag= avcodec_pix_fmt_to_codec_tag(avctx->pix_fmt);
3971  avctx->codec_tag= tag;
3972  }
3973 
3974  /* estimate average framerate if not set by demuxer */
3975  if (st->info->codec_info_duration_fields &&
3976  !st->avg_frame_rate.num &&
3977  st->info->codec_info_duration) {
3978  int best_fps = 0;
3979  double best_error = 0.01;
3980  AVRational codec_frame_rate = avctx->framerate;
3981 
3982  if (st->info->codec_info_duration >= INT64_MAX / st->time_base.num / 2||
3983  st->info->codec_info_duration_fields >= INT64_MAX / st->time_base.den ||
3984  st->info->codec_info_duration < 0)
3985  continue;
3987  st->info->codec_info_duration_fields * (int64_t) st->time_base.den,
3988  st->info->codec_info_duration * 2 * (int64_t) st->time_base.num, 60000);
3989 
3990  /* Round guessed framerate to a "standard" framerate if it's
3991  * within 1% of the original estimate. */
3992  for (j = 0; j < MAX_STD_TIMEBASES; j++) {
3993  AVRational std_fps = { get_std_framerate(j), 12 * 1001 };
3994  double error = fabs(av_q2d(st->avg_frame_rate) /
3995  av_q2d(std_fps) - 1);
3996 
3997  if (error < best_error) {
3998  best_error = error;
3999  best_fps = std_fps.num;
4000  }
4001 
4002  if (ic->internal->prefer_codec_framerate && codec_frame_rate.num > 0 && codec_frame_rate.den > 0) {
4003  error = fabs(av_q2d(codec_frame_rate) /
4004  av_q2d(std_fps) - 1);
4005  if (error < best_error) {
4006  best_error = error;
4007  best_fps = std_fps.num;
4008  }
4009  }
4010  }
4011  if (best_fps)
4013  best_fps, 12 * 1001, INT_MAX);
4014  }
4015 
4016  if (!st->r_frame_rate.num) {
4017  if ( avctx->time_base.den * (int64_t) st->time_base.num
4018  <= avctx->time_base.num * avctx->ticks_per_frame * (int64_t) st->time_base.den) {
4020  avctx->time_base.den, (int64_t)avctx->time_base.num * avctx->ticks_per_frame, INT_MAX);
4021  } else {
4022  st->r_frame_rate.num = st->time_base.den;
4023  st->r_frame_rate.den = st->time_base.num;
4024  }
4025  }
4027  AVRational hw_ratio = { avctx->height, avctx->width };
4029  hw_ratio);
4030  }
4031  } else if (avctx->codec_type == AVMEDIA_TYPE_AUDIO) {
4032  if (!avctx->bits_per_coded_sample)
4033  avctx->bits_per_coded_sample =
4035  // set stream disposition based on audio service type
4036  switch (avctx->audio_service_type) {
4039  break;
4042  break;
4045  break;
4048  break;
4051  break;
4052  }
4053  }
4054  }
4055 
4056  if (probesize)
4057  estimate_timings(ic, old_offset);
4058 
4059  av_opt_set(ic, "skip_clear", "0", AV_OPT_SEARCH_CHILDREN);
4060 
4061  if (ret >= 0 && ic->nb_streams)
4062  /* We could not have all the codec parameters before EOF. */
4063  ret = -1;
4064  for (i = 0; i < ic->nb_streams; i++) {
4065  const char *errmsg;
4066  st = ic->streams[i];
4067 
4068  /* if no packet was ever seen, update context now for has_codec_parameters */
4069  if (!st->internal->avctx_inited) {
4070  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
4072  st->codecpar->format = st->internal->avctx->sample_fmt;
4074  if (ret < 0)
4075  goto find_stream_info_err;
4076  }
4077  if (!has_codec_parameters(st, &errmsg)) {
4078  char buf[256];
4079  avcodec_string(buf, sizeof(buf), st->internal->avctx, 0);
4080  av_log(ic, AV_LOG_WARNING,
4081  "Could not find codec parameters for stream %d (%s): %s\n"
4082  "Consider increasing the value for the 'analyzeduration' and 'probesize' options\n",
4083  i, buf, errmsg);
4084  } else {
4085  ret = 0;
4086  }
4087  }
4088 
4090 
4091  /* update the stream parameters from the internal codec contexts */
4092  for (i = 0; i < ic->nb_streams; i++) {
4093  st = ic->streams[i];
4094 
4095  if (st->internal->avctx_inited) {
4096  int orig_w = st->codecpar->width;
4097  int orig_h = st->codecpar->height;
4099  if (ret < 0)
4100  goto find_stream_info_err;
4101 #if FF_API_LOWRES
4102  // The decoder might reduce the video size by the lowres factor.
4103  if (st->internal->avctx->lowres && orig_w) {
4104  st->codecpar->width = orig_w;
4105  st->codecpar->height = orig_h;
4106  }
4107 #endif
4108  }
4109 
4110 #if FF_API_LAVF_AVCTX
4112  ret = avcodec_parameters_to_context(st->codec, st->codecpar);
4113  if (ret < 0)
4114  goto find_stream_info_err;
4115 
4116 #if FF_API_LOWRES
4117  // The old API (AVStream.codec) "requires" the resolution to be adjusted
4118  // by the lowres factor.
4119  if (st->internal->avctx->lowres && st->internal->avctx->width) {
4120  st->codec->lowres = st->internal->avctx->lowres;
4121  st->codec->width = st->internal->avctx->width;
4122  st->codec->height = st->internal->avctx->height;
4123  }
4124 #endif
4125 
4126  if (st->codec->codec_tag != MKTAG('t','m','c','d')) {
4127  st->codec->time_base = st->internal->avctx->time_base;
4128  st->codec->ticks_per_frame = st->internal->avctx->ticks_per_frame;
4129  }
4130  st->codec->framerate = st->avg_frame_rate;
4131 
4132  if (st->internal->avctx->subtitle_header) {
4133  st->codec->subtitle_header = av_malloc(st->internal->avctx->subtitle_header_size);
4134  if (!st->codec->subtitle_header)
4135  goto find_stream_info_err;
4136  st->codec->subtitle_header_size = st->internal->avctx->subtitle_header_size;
4137  memcpy(st->codec->subtitle_header, st->internal->avctx->subtitle_header,
4138  st->codec->subtitle_header_size);
4139  }
4140 
4141  // Fields unavailable in AVCodecParameters
4142  st->codec->coded_width = st->internal->avctx->coded_width;
4143  st->codec->coded_height = st->internal->avctx->coded_height;
4144  st->codec->properties = st->internal->avctx->properties;
4146 #endif
4147 
4148  st->internal->avctx_inited = 0;
4149  }
4150 
4151 find_stream_info_err:
4152  for (i = 0; i < ic->nb_streams; i++) {
4153  st = ic->streams[i];
4154  if (st->info)
4155  av_freep(&st->info->duration_error);
4156  avcodec_close(ic->streams[i]->internal->avctx);
4157  av_freep(&ic->streams[i]->info);
4160  }
4161  if (ic->pb)
4162  av_log(ic, AV_LOG_DEBUG, "After avformat_find_stream_info() pos: %"PRId64" bytes read:%"PRId64" seeks:%d frames:%d\n",
4163  avio_tell(ic->pb), ic->pb->bytes_read, ic->pb->seek_count, count);
4164  return ret;
4165 }
4166 
4167 AVProgram *av_find_program_from_stream(AVFormatContext *ic, AVProgram *last, int s)
4168 {
4169  int i, j;
4170 
4171  for (i = 0; i < ic->nb_programs; i++) {
4172  if (ic->programs[i] == last) {
4173  last = NULL;
4174  } else {
4175  if (!last)
4176  for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
4177  if (ic->programs[i]->stream_index[j] == s)
4178  return ic->programs[i];
4179  }
4180  }
4181  return NULL;
4182 }
4183 
4184 int av_find_best_stream(AVFormatContext *ic, enum AVMediaType type,
4185  int wanted_stream_nb, int related_stream,
4186  AVCodec **decoder_ret, int flags)
4187 {
4188  int i, nb_streams = ic->nb_streams;
4189  int ret = AVERROR_STREAM_NOT_FOUND;
4190  int best_count = -1, best_multiframe = -1, best_disposition = -1;
4191  int count, multiframe, disposition;
4192  int64_t best_bitrate = -1;
4193  int64_t bitrate;
4194  unsigned *program = NULL;
4195  const AVCodec *decoder = NULL, *best_decoder = NULL;
4196 
4197  if (related_stream >= 0 && wanted_stream_nb < 0) {
4198  AVProgram *p = av_find_program_from_stream(ic, NULL, related_stream);
4199  if (p) {
4200  program = p->stream_index;
4201  nb_streams = p->nb_stream_indexes;
4202  }
4203  }
4204  for (i = 0; i < nb_streams; i++) {
4205  int real_stream_index = program ? program[i] : i;
4206  AVStream *st = ic->streams[real_stream_index];
4207  AVCodecParameters *par = st->codecpar;
4208  if (par->codec_type != type)
4209  continue;
4210  if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
4211  continue;
4212  if (type == AVMEDIA_TYPE_AUDIO && !(par->channels && par->sample_rate))
4213  continue;
4214  if (decoder_ret) {
4215  decoder = find_decoder(ic, st, par->codec_id);
4216  if (!decoder) {
4217  if (ret < 0)
4219  continue;
4220  }
4221  }
4223  count = st->codec_info_nb_frames;
4224  bitrate = par->bit_rate;
4225  multiframe = FFMIN(5, count);
4226  if ((best_disposition > disposition) ||
4227  (best_disposition == disposition && best_multiframe > multiframe) ||
4228  (best_disposition == disposition && best_multiframe == multiframe && best_bitrate > bitrate) ||
4229  (best_disposition == disposition && best_multiframe == multiframe && best_bitrate == bitrate && best_count >= count))
4230  continue;
4231  best_disposition = disposition;
4232  best_count = count;
4233  best_bitrate = bitrate;
4234  best_multiframe = multiframe;
4235  ret = real_stream_index;
4236  best_decoder = decoder;
4237  if (program && i == nb_streams - 1 && ret < 0) {
4238  program = NULL;
4239  nb_streams = ic->nb_streams;
4240  /* no related stream found, try again with everything */
4241  i = 0;
4242  }
4243  }
4244  if (decoder_ret)
4245  *decoder_ret = (AVCodec*)best_decoder;
4246  return ret;
4247 }
4248 
4249 /*******************************************************/
4250 
4251 int av_read_play(AVFormatContext *s)
4252 {
4253  if (s->iformat->read_play)
4254  return s->iformat->read_play(s);
4255  if (s->pb)
4256  return avio_pause(s->pb, 0);
4257  return AVERROR(ENOSYS);
4258 }
4259 
4260 int av_read_pause(AVFormatContext *s)
4261 {
4262  if (s->iformat->read_pause)
4263  return s->iformat->read_pause(s);
4264  if (s->pb)
4265  return avio_pause(s->pb, 1);
4266  return AVERROR(ENOSYS);
4267 }
4268 
4270 {
4271  int ret, i;
4272 
4273  dst->id = src->id;
4274  dst->time_base = src->time_base;
4275  dst->nb_frames = src->nb_frames;
4276  dst->disposition = src->disposition;
4278  dst->avg_frame_rate = src->avg_frame_rate;
4279  dst->r_frame_rate = src->r_frame_rate;
4280 
4281  av_dict_free(&dst->metadata);
4282  ret = av_dict_copy(&dst->metadata, src->metadata, 0);
4283  if (ret < 0)
4284  return ret;
4285 
4286  ret = avcodec_parameters_copy(dst->codecpar, src->codecpar);
4287  if (ret < 0)
4288  return ret;
4289 
4290  /* Free existing side data*/
4291  for (i = 0; i < dst->nb_side_data; i++)
4292  av_free(dst->side_data[i].data);
4293  av_freep(&dst->side_data);
4294  dst->nb_side_data = 0;
4295 
4296  /* Copy side data if present */
4297  if (src->nb_side_data) {
4299  sizeof(AVPacketSideData));
4300  if (!dst->side_data)
4301  return AVERROR(ENOMEM);
4302  dst->nb_side_data = src->nb_side_data;
4303 
4304  for (i = 0; i < src->nb_side_data; i++) {
4305  uint8_t *data = av_memdup(src->side_data[i].data,
4306  src->side_data[i].size);
4307  if (!data)
4308  return AVERROR(ENOMEM);
4309  dst->side_data[i].type = src->side_data[i].type;
4310  dst->side_data[i].size = src->side_data[i].size;
4311  dst->side_data[i].data = data;
4312  }
4313  }
4314 
4315 #if FF_API_LAVF_FFSERVER
4317  av_freep(&dst->recommended_encoder_configuration);
4318  if (src->recommended_encoder_configuration) {
4319  const char *conf_str = src->recommended_encoder_configuration;
4320  dst->recommended_encoder_configuration = av_strdup(conf_str);
4321  if (!dst->recommended_encoder_configuration)
4322  return AVERROR(ENOMEM);
4323  }
4325 #endif
4326 
4327  return 0;
4328 }
4329 
4330 static void free_stream(AVStream **pst)
4331 {
4332  AVStream *st = *pst;
4333  int i;
4334 
4335  if (!st)
4336  return;
4337 
4338  for (i = 0; i < st->nb_side_data; i++)
4339  av_freep(&st->side_data[i].data);
4340  av_freep(&st->side_data);
4341 
4342  if (st->parser)
4343  av_parser_close(st->parser);
4344 
4345  if (st->attached_pic.data)
4347 
4348  if (st->internal) {
4350  for (i = 0; i < st->internal->nb_bsfcs; i++) {
4351  av_bsf_free(&st->internal->bsfcs[i]);
4352  av_freep(&st->internal->bsfcs);
4353  }
4354  av_freep(&st->internal->priv_pts);
4357  }
4358  av_freep(&st->internal);
4359 
4360  av_dict_free(&st->metadata);
4362  av_freep(&st->probe_data.buf);
4363  av_freep(&st->index_entries);
4364 #if FF_API_LAVF_AVCTX
4366  avcodec_free_context(&st->codec);
4368 #endif
4369  av_freep(&st->priv_data);
4370  if (st->info)
4371  av_freep(&st->info->duration_error);
4372  av_freep(&st->info);
4373 #if FF_API_LAVF_FFSERVER
4375  av_freep(&st->recommended_encoder_configuration);
4377 #endif
4378 
4379  av_freep(pst);
4380 }
4381 
4382 void ff_free_stream(AVFormatContext *s, AVStream *st)
4383 {
4384  av_assert0(s->nb_streams>0);
4385  av_assert0(s->streams[ s->nb_streams - 1 ] == st);
4386 
4387  free_stream(&s->streams[ --s->nb_streams ]);
4388 }
4389 
4390 void avformat_free_context(AVFormatContext *s)
4391 {
4392  int i;
4393 
4394  if (!s)
4395  return;
4396 
4397  av_opt_free(s);
4398  if (s->iformat && s->iformat->priv_class && s->priv_data)
4399  av_opt_free(s->priv_data);
4400  if (s->oformat && s->oformat->priv_class && s->priv_data)
4401  av_opt_free(s->priv_data);
4402 
4403  for (i = s->nb_streams - 1; i >= 0; i--)
4404  ff_free_stream(s, s->streams[i]);
4405 
4406 
4407  for (i = s->nb_programs - 1; i >= 0; i--) {
4408  av_dict_free(&s->programs[i]->metadata);
4409  av_freep(&s->programs[i]->stream_index);
4410  av_freep(&s->programs[i]);
4411  }
4412  av_freep(&s->programs);
4413  av_freep(&s->priv_data);
4414  while (s->nb_chapters--) {
4416  av_freep(&s->chapters[s->nb_chapters]);
4417  }
4418  av_freep(&s->chapters);
4419  av_dict_free(&s->metadata);
4421  av_freep(&s->streams);
4422  flush_packet_queue(s);
4423  av_freep(&s->internal);
4424  av_freep(&s->url);
4425  av_free(s);
4426 }
4427 
4428 void avformat_close_input(AVFormatContext **ps)
4429 {
4430  AVFormatContext *s;
4431  AVIOContext *pb;
4432 
4433  if (!ps || !*ps)
4434  return;
4435 
4436  s = *ps;
4437  pb = s->pb;
4438 
4439  if ((s->iformat && strcmp(s->iformat->name, "image2") && s->iformat->flags & AVFMT_NOFILE) ||
4440  (s->flags & AVFMT_FLAG_CUSTOM_IO))
4441  pb = NULL;
4442 
4443  flush_packet_queue(s);
4444 
4445  if (s->iformat)
4446  if (s->iformat->read_close)
4447  s->iformat->read_close(s);
4448 
4450 
4451  *ps = NULL;
4452 
4453  avio_close(pb);
4454 }
4455 
4456 AVStream *avformat_new_stream(AVFormatContext *s, const AVCodec *c)
4457 {
4458  AVStream *st;
4459  int i;
4460  AVStream **streams;
4461 
4462  if (s->nb_streams >= FFMIN(s->max_streams, INT_MAX/sizeof(*streams))) {
4463  if (s->max_streams < INT_MAX/sizeof(*streams))
4464  av_log(s, AV_LOG_ERROR, "Number of streams exceeds max_streams parameter (%d), see the documentation if you wish to increase it\n", s->max_streams);
4465  return NULL;
4466  }
4467  streams = av_realloc_array(s->streams, s->nb_streams + 1, sizeof(*streams));
4468  if (!streams)
4469  return NULL;
4470  s->streams = streams;
4471 
4472  st = av_mallocz(sizeof(AVStream));
4473  if (!st)
4474  return NULL;
4475  if (!(st->info = av_mallocz(sizeof(*st->info)))) {
4476  av_free(st);
4477  return NULL;
4478  }
4479  st->info->last_dts = AV_NOPTS_VALUE;
4480 
4481 #if FF_API_LAVF_AVCTX
4483  st->codec = avcodec_alloc_context3(c);
4484  if (!st->codec) {
4485  av_free(st->info);
4486  av_free(st);
4487  return NULL;
4488  }
4490 #endif
4491 
4492  st->internal = av_mallocz(sizeof(*st->internal));
4493  if (!st->internal)
4494  goto fail;
4495 
4497  if (!st->codecpar)
4498  goto fail;
4499 
4501  if (!st->internal->avctx)
4502  goto fail;
4503 
4504  if (s->iformat) {
4505 #if FF_API_LAVF_AVCTX
4507  /* no default bitrate if decoding */
4508  st->codec->bit_rate = 0;
4510 #endif
4511 
4512  /* default pts setting is MPEG-like */
4513  avpriv_set_pts_info(st, 33, 1, 90000);
4514  /* we set the current DTS to 0 so that formats without any timestamps
4515  * but durations get some timestamps, formats with some unknown
4516  * timestamps have their first few packets buffered and the
4517  * timestamps corrected before they are returned to the user */
4518  st->cur_dts = RELATIVE_TS_BASE;
4519  } else {
4520  st->cur_dts = AV_NOPTS_VALUE;
4521  }
4522 
4523  st->index = s->nb_streams;
4524  st->start_time = AV_NOPTS_VALUE;
4525  st->duration = AV_NOPTS_VALUE;
4526  st->first_dts = AV_NOPTS_VALUE;
4530 
4533  for (i = 0; i < MAX_REORDER_DELAY + 1; i++)
4534  st->pts_buffer[i] = AV_NOPTS_VALUE;
4535 
4536  st->sample_aspect_ratio = (AVRational) { 0, 1 };
4537 
4538 #if FF_API_R_FRAME_RATE
4539  st->info->last_dts = AV_NOPTS_VALUE;
4540 #endif
4543 
4545 
4546  st->internal->need_context_update = 1;
4547 
4548  s->streams[s->nb_streams++] = st;
4549  return st;
4550 fail:
4551  free_stream(&st);
4552  return NULL;
4553 }
4554 
4555 AVProgram *av_new_program(AVFormatContext *ac, int id)
4556 {
4557  AVProgram *program = NULL;
4558  int i;
4559 
4560  av_log(ac, AV_LOG_TRACE, "new_program: id=0x%04x\n", id);
4561 
4562  for (i = 0; i < ac->nb_programs; i++)
4563  if (ac->programs[i]->id == id)
4564  program = ac->programs[i];
4565 
4566  if (!program) {
4567  program = av_mallocz(sizeof(AVProgram));
4568  if (!program)
4569  return NULL;
4570  dynarray_add(&ac->programs, &ac->nb_programs, program);
4571  program->discard = AVDISCARD_NONE;
4572  program->pmt_version = -1;
4573  }
4574  program->id = id;
4577 
4578  program->start_time =
4579  program->end_time = AV_NOPTS_VALUE;
4580 
4581  return program;
4582 }
4583 
4584 AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base,
4585  int64_t start, int64_t end, const char *title)
4586 {
4587  AVChapter *chapter = NULL;
4588  int i;
4589 
4590  if (end != AV_NOPTS_VALUE && start > end) {
4591  av_log(s, AV_LOG_ERROR, "Chapter end time %"PRId64" before start %"PRId64"\n", end, start);
4592  return NULL;
4593  }
4594 
4595  for (i = 0; i < s->nb_chapters; i++)
4596  if (s->chapters[i]->id == id)
4597  chapter = s->chapters[i];
4598 
4599  if (!chapter) {
4600  chapter = av_mallocz(sizeof(AVChapter));
4601  if (!chapter)
4602  return NULL;
4603  dynarray_add(&s->chapters, &s->nb_chapters, chapter);
4604  }
4605  av_dict_set(&chapter->metadata, "title", title, 0);
4606  chapter->id = id;
4607  chapter->time_base = time_base;
4608  chapter->start = start;
4609  chapter->end = end;
4610 
4611  return chapter;
4612 }
4613 
4614 void av_program_add_stream_index(AVFormatContext *ac, int progid, unsigned idx)
4615 {
4616  int i, j;
4617  AVProgram *program = NULL;
4618  void *tmp;
4619 
4620  if (idx >= ac->nb_streams) {
4621  av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
4622  return;
4623  }
4624 
4625  for (i = 0; i < ac->nb_programs; i++) {
4626  if (ac->programs[i]->id != progid)
4627  continue;
4628  program = ac->programs[i];
4629  for (j = 0; j < program->nb_stream_indexes; j++)
4630  if (program->stream_index[j] == idx)
4631  return;
4632 
4633  tmp = av_realloc_array(program->stream_index, program->nb_stream_indexes+1, sizeof(unsigned int));
4634  if (!tmp)
4635  return;
4636  program->stream_index = tmp;
4637  program->stream_index[program->nb_stream_indexes++] = idx;
4638  return;
4639  }
4640 }
4641 
4642 uint64_t ff_ntp_time(void)
4643 {
4644  return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
4645 }
4646 
4647 int av_get_frame_filename2(char *buf, int buf_size, const char *path, int number, int flags)
4648 {
4649  const char *p;
4650  char *q, buf1[20], c;
4651  int nd, len, percentd_found;
4652 
4653  q = buf;
4654  p = path;
4655  percentd_found = 0;
4656  for (;;) {
4657  c = *p++;
4658  if (c == '\0')
4659  break;
4660  if (c == '%') {
4661  do {
4662  nd = 0;
4663  while (av_isdigit(*p))
4664  nd = nd * 10 + *p++ - '0';
4665  c = *p++;
4666  } while (av_isdigit(c));
4667 
4668  switch (c) {
4669  case '%':
4670  goto addchar;
4671  case 'd':
4672  if (!(flags & AV_FRAME_FILENAME_FLAGS_MULTIPLE) && percentd_found)
4673  goto fail;
4674  percentd_found = 1;
4675  if (number < 0)
4676  nd += 1;
4677  snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
4678  len = strlen(buf1);
4679  if ((q - buf + len) > buf_size - 1)
4680  goto fail;
4681  memcpy(q, buf1, len);
4682  q += len;
4683  break;
4684  default:
4685