FFmpeg  4.2.1
hls.c
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1 /*
2  * Apple HTTP Live Streaming demuxer
3  * Copyright (c) 2010 Martin Storsjo
4  * Copyright (c) 2013 Anssi Hannula
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 /**
24  * @file
25  * Apple HTTP Live Streaming demuxer
26  * http://tools.ietf.org/html/draft-pantos-http-live-streaming
27  */
28 
29 #include "libavformat/http.h"
30 #include "libavutil/avstring.h"
31 #include "libavutil/avassert.h"
32 #include "libavutil/intreadwrite.h"
33 #include "libavutil/mathematics.h"
34 #include "libavutil/opt.h"
35 #include "libavutil/dict.h"
36 #include "libavutil/time.h"
37 #include "avformat.h"
38 #include "internal.h"
39 #include "avio_internal.h"
40 #include "id3v2.h"
41 
42 #define INITIAL_BUFFER_SIZE 32768
43 
44 #define MAX_FIELD_LEN 64
45 #define MAX_CHARACTERISTICS_LEN 512
46 
47 #define MPEG_TIME_BASE 90000
48 #define MPEG_TIME_BASE_Q (AVRational){1, MPEG_TIME_BASE}
49 
50 /*
51  * An apple http stream consists of a playlist with media segment files,
52  * played sequentially. There may be several playlists with the same
53  * video content, in different bandwidth variants, that are played in
54  * parallel (preferably only one bandwidth variant at a time). In this case,
55  * the user supplied the url to a main playlist that only lists the variant
56  * playlists.
57  *
58  * If the main playlist doesn't point at any variants, we still create
59  * one anonymous toplevel variant for this, to maintain the structure.
60  */
61 
62 enum KeyType {
66 };
67 
68 struct segment {
69  int64_t duration;
70  int64_t url_offset;
71  int64_t size;
72  char *url;
73  char *key;
75  uint8_t iv[16];
76  /* associated Media Initialization Section, treated as a segment */
78 };
79 
80 struct rendition;
81 
86 };
87 
88 /*
89  * Each playlist has its own demuxer. If it currently is active,
90  * it has an open AVIOContext too, and potentially an AVPacket
91  * containing the next packet from this stream.
92  */
93 struct playlist {
102  int index;
106 
107  /* main demuxer streams associated with this playlist
108  * indexed by the subdemuxer stream indexes */
111 
112  int finished;
117  struct segment **segments;
118  int needed;
120  int64_t cur_seg_offset;
121  int64_t last_load_time;
122 
123  /* Currently active Media Initialization Section */
126  unsigned int init_sec_buf_size;
127  unsigned int init_sec_data_len;
129 
130  char key_url[MAX_URL_SIZE];
132 
133  /* ID3 timestamp handling (elementary audio streams have ID3 timestamps
134  * (and possibly other ID3 tags) in the beginning of each segment) */
135  int is_id3_timestamped; /* -1: not yet known */
136  int64_t id3_mpegts_timestamp; /* in mpegts tb */
137  int64_t id3_offset; /* in stream original tb */
138  uint8_t* id3_buf; /* temp buffer for id3 parsing */
139  unsigned int id3_buf_size;
140  AVDictionary *id3_initial; /* data from first id3 tag */
141  int id3_found; /* ID3 tag found at some point */
142  int id3_changed; /* ID3 tag data has changed at some point */
143  ID3v2ExtraMeta *id3_deferred_extra; /* stored here until subdemuxer is opened */
144 
145  int64_t seek_timestamp;
147  int seek_stream_index; /* into subdemuxer stream array */
148 
149  /* Renditions associated with this playlist, if any.
150  * Alternative rendition playlists have a single rendition associated
151  * with them, and variant main Media Playlists may have
152  * multiple (playlist-less) renditions associated with them. */
155 
156  /* Media Initialization Sections (EXT-X-MAP) associated with this
157  * playlist, if any. */
160 };
161 
162 /*
163  * Renditions are e.g. alternative subtitle or audio streams.
164  * The rendition may either be an external playlist or it may be
165  * contained in the main Media Playlist of the variant (in which case
166  * playlist is NULL).
167  */
168 struct rendition {
171  char group_id[MAX_FIELD_LEN];
172  char language[MAX_FIELD_LEN];
175 };
176 
177 struct variant {
179 
180  /* every variant contains at least the main Media Playlist in index 0 */
182  struct playlist **playlists;
183 
184  char audio_group[MAX_FIELD_LEN];
185  char video_group[MAX_FIELD_LEN];
186  char subtitles_group[MAX_FIELD_LEN];
187 };
188 
189 typedef struct HLSContext {
190  AVClass *class;
193  struct variant **variants;
195  struct playlist **playlists;
198 
203  int64_t cur_timestamp;
211 } HLSContext;
212 
213 static void free_segment_dynarray(struct segment **segments, int n_segments)
214 {
215  int i;
216  for (i = 0; i < n_segments; i++) {
217  av_freep(&segments[i]->key);
218  av_freep(&segments[i]->url);
219  av_freep(&segments[i]);
220  }
221 }
222 
223 static void free_segment_list(struct playlist *pls)
224 {
226  av_freep(&pls->segments);
227  pls->n_segments = 0;
228 }
229 
230 static void free_init_section_list(struct playlist *pls)
231 {
232  int i;
233  for (i = 0; i < pls->n_init_sections; i++) {
234  av_freep(&pls->init_sections[i]->url);
235  av_freep(&pls->init_sections[i]);
236  }
237  av_freep(&pls->init_sections);
238  pls->n_init_sections = 0;
239 }
240 
242 {
243  int i;
244  for (i = 0; i < c->n_playlists; i++) {
245  struct playlist *pls = c->playlists[i];
246  free_segment_list(pls);
248  av_freep(&pls->main_streams);
249  av_freep(&pls->renditions);
250  av_freep(&pls->id3_buf);
251  av_dict_free(&pls->id3_initial);
253  av_freep(&pls->init_sec_buf);
254  av_packet_unref(&pls->pkt);
255  av_freep(&pls->pb.buffer);
256  if (pls->input)
257  ff_format_io_close(c->ctx, &pls->input);
258  pls->input_read_done = 0;
259  if (pls->input_next)
260  ff_format_io_close(c->ctx, &pls->input_next);
261  pls->input_next_requested = 0;
262  if (pls->ctx) {
263  pls->ctx->pb = NULL;
264  avformat_close_input(&pls->ctx);
265  }
266  av_free(pls);
267  }
268  av_freep(&c->playlists);
269  c->n_playlists = 0;
270 }
271 
273 {
274  int i;
275  for (i = 0; i < c->n_variants; i++) {
276  struct variant *var = c->variants[i];
277  av_freep(&var->playlists);
278  av_free(var);
279  }
280  av_freep(&c->variants);
281  c->n_variants = 0;
282 }
283 
285 {
286  int i;
287  for (i = 0; i < c->n_renditions; i++)
288  av_freep(&c->renditions[i]);
289  av_freep(&c->renditions);
290  c->n_renditions = 0;
291 }
292 
293 /*
294  * Used to reset a statically allocated AVPacket to a clean state,
295  * containing no data.
296  */
297 static void reset_packet(AVPacket *pkt)
298 {
299  av_init_packet(pkt);
300  pkt->data = NULL;
301 }
302 
303 static struct playlist *new_playlist(HLSContext *c, const char *url,
304  const char *base)
305 {
306  struct playlist *pls = av_mallocz(sizeof(struct playlist));
307  if (!pls)
308  return NULL;
309  reset_packet(&pls->pkt);
310  ff_make_absolute_url(pls->url, sizeof(pls->url), base, url);
312 
313  pls->is_id3_timestamped = -1;
315 
316  dynarray_add(&c->playlists, &c->n_playlists, pls);
317  return pls;
318 }
319 
320 struct variant_info {
321  char bandwidth[20];
322  /* variant group ids: */
323  char audio[MAX_FIELD_LEN];
324  char video[MAX_FIELD_LEN];
325  char subtitles[MAX_FIELD_LEN];
326 };
327 
328 static struct variant *new_variant(HLSContext *c, struct variant_info *info,
329  const char *url, const char *base)
330 {
331  struct variant *var;
332  struct playlist *pls;
333 
334  pls = new_playlist(c, url, base);
335  if (!pls)
336  return NULL;
337 
338  var = av_mallocz(sizeof(struct variant));
339  if (!var)
340  return NULL;
341 
342  if (info) {
343  var->bandwidth = atoi(info->bandwidth);
344  strcpy(var->audio_group, info->audio);
345  strcpy(var->video_group, info->video);
346  strcpy(var->subtitles_group, info->subtitles);
347  }
348 
349  dynarray_add(&c->variants, &c->n_variants, var);
350  dynarray_add(&var->playlists, &var->n_playlists, pls);
351  return var;
352 }
353 
354 static void handle_variant_args(struct variant_info *info, const char *key,
355  int key_len, char **dest, int *dest_len)
356 {
357  if (!strncmp(key, "BANDWIDTH=", key_len)) {
358  *dest = info->bandwidth;
359  *dest_len = sizeof(info->bandwidth);
360  } else if (!strncmp(key, "AUDIO=", key_len)) {
361  *dest = info->audio;
362  *dest_len = sizeof(info->audio);
363  } else if (!strncmp(key, "VIDEO=", key_len)) {
364  *dest = info->video;
365  *dest_len = sizeof(info->video);
366  } else if (!strncmp(key, "SUBTITLES=", key_len)) {
367  *dest = info->subtitles;
368  *dest_len = sizeof(info->subtitles);
369  }
370 }
371 
372 struct key_info {
373  char uri[MAX_URL_SIZE];
374  char method[11];
375  char iv[35];
376 };
377 
378 static void handle_key_args(struct key_info *info, const char *key,
379  int key_len, char **dest, int *dest_len)
380 {
381  if (!strncmp(key, "METHOD=", key_len)) {
382  *dest = info->method;
383  *dest_len = sizeof(info->method);
384  } else if (!strncmp(key, "URI=", key_len)) {
385  *dest = info->uri;
386  *dest_len = sizeof(info->uri);
387  } else if (!strncmp(key, "IV=", key_len)) {
388  *dest = info->iv;
389  *dest_len = sizeof(info->iv);
390  }
391 }
392 
394  char uri[MAX_URL_SIZE];
395  char byterange[32];
396 };
397 
398 static struct segment *new_init_section(struct playlist *pls,
399  struct init_section_info *info,
400  const char *url_base)
401 {
402  struct segment *sec;
403  char *ptr;
404  char tmp_str[MAX_URL_SIZE];
405 
406  if (!info->uri[0])
407  return NULL;
408 
409  sec = av_mallocz(sizeof(*sec));
410  if (!sec)
411  return NULL;
412 
413  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url_base, info->uri);
414  sec->url = av_strdup(tmp_str);
415  if (!sec->url) {
416  av_free(sec);
417  return NULL;
418  }
419 
420  if (info->byterange[0]) {
421  sec->size = strtoll(info->byterange, NULL, 10);
422  ptr = strchr(info->byterange, '@');
423  if (ptr)
424  sec->url_offset = strtoll(ptr+1, NULL, 10);
425  } else {
426  /* the entire file is the init section */
427  sec->size = -1;
428  }
429 
430  dynarray_add(&pls->init_sections, &pls->n_init_sections, sec);
431 
432  return sec;
433 }
434 
435 static void handle_init_section_args(struct init_section_info *info, const char *key,
436  int key_len, char **dest, int *dest_len)
437 {
438  if (!strncmp(key, "URI=", key_len)) {
439  *dest = info->uri;
440  *dest_len = sizeof(info->uri);
441  } else if (!strncmp(key, "BYTERANGE=", key_len)) {
442  *dest = info->byterange;
443  *dest_len = sizeof(info->byterange);
444  }
445 }
446 
448  char type[16];
449  char uri[MAX_URL_SIZE];
450  char group_id[MAX_FIELD_LEN];
451  char language[MAX_FIELD_LEN];
452  char assoc_language[MAX_FIELD_LEN];
454  char defaultr[4];
455  char forced[4];
456  char characteristics[MAX_CHARACTERISTICS_LEN];
457 };
458 
459 static struct rendition *new_rendition(HLSContext *c, struct rendition_info *info,
460  const char *url_base)
461 {
462  struct rendition *rend;
464  char *characteristic;
465  char *chr_ptr;
466  char *saveptr;
467 
468  if (!strcmp(info->type, "AUDIO"))
469  type = AVMEDIA_TYPE_AUDIO;
470  else if (!strcmp(info->type, "VIDEO"))
471  type = AVMEDIA_TYPE_VIDEO;
472  else if (!strcmp(info->type, "SUBTITLES"))
473  type = AVMEDIA_TYPE_SUBTITLE;
474  else if (!strcmp(info->type, "CLOSED-CAPTIONS"))
475  /* CLOSED-CAPTIONS is ignored since we do not support CEA-608 CC in
476  * AVC SEI RBSP anyway */
477  return NULL;
478 
479  if (type == AVMEDIA_TYPE_UNKNOWN) {
480  av_log(c, AV_LOG_WARNING, "Can't support the type: %s\n", info->type);
481  return NULL;
482  }
483 
484  /* URI is mandatory for subtitles as per spec */
485  if (type == AVMEDIA_TYPE_SUBTITLE && !info->uri[0]) {
486  av_log(c, AV_LOG_ERROR, "The URI tag is REQUIRED for subtitle.\n");
487  return NULL;
488  }
489 
490  /* TODO: handle subtitles (each segment has to parsed separately) */
492  if (type == AVMEDIA_TYPE_SUBTITLE) {
493  av_log(c, AV_LOG_WARNING, "Can't support the subtitle(uri: %s)\n", info->uri);
494  return NULL;
495  }
496 
497  rend = av_mallocz(sizeof(struct rendition));
498  if (!rend)
499  return NULL;
500 
501  dynarray_add(&c->renditions, &c->n_renditions, rend);
502 
503  rend->type = type;
504  strcpy(rend->group_id, info->group_id);
505  strcpy(rend->language, info->language);
506  strcpy(rend->name, info->name);
507 
508  /* add the playlist if this is an external rendition */
509  if (info->uri[0]) {
510  rend->playlist = new_playlist(c, info->uri, url_base);
511  if (rend->playlist)
513  &rend->playlist->n_renditions, rend);
514  }
515 
516  if (info->assoc_language[0]) {
517  int langlen = strlen(rend->language);
518  if (langlen < sizeof(rend->language) - 3) {
519  rend->language[langlen] = ',';
520  strncpy(rend->language + langlen + 1, info->assoc_language,
521  sizeof(rend->language) - langlen - 2);
522  }
523  }
524 
525  if (!strcmp(info->defaultr, "YES"))
527  if (!strcmp(info->forced, "YES"))
529 
530  chr_ptr = info->characteristics;
531  while ((characteristic = av_strtok(chr_ptr, ",", &saveptr))) {
532  if (!strcmp(characteristic, "public.accessibility.describes-music-and-sound"))
534  else if (!strcmp(characteristic, "public.accessibility.describes-video"))
536 
537  chr_ptr = NULL;
538  }
539 
540  return rend;
541 }
542 
543 static void handle_rendition_args(struct rendition_info *info, const char *key,
544  int key_len, char **dest, int *dest_len)
545 {
546  if (!strncmp(key, "TYPE=", key_len)) {
547  *dest = info->type;
548  *dest_len = sizeof(info->type);
549  } else if (!strncmp(key, "URI=", key_len)) {
550  *dest = info->uri;
551  *dest_len = sizeof(info->uri);
552  } else if (!strncmp(key, "GROUP-ID=", key_len)) {
553  *dest = info->group_id;
554  *dest_len = sizeof(info->group_id);
555  } else if (!strncmp(key, "LANGUAGE=", key_len)) {
556  *dest = info->language;
557  *dest_len = sizeof(info->language);
558  } else if (!strncmp(key, "ASSOC-LANGUAGE=", key_len)) {
559  *dest = info->assoc_language;
560  *dest_len = sizeof(info->assoc_language);
561  } else if (!strncmp(key, "NAME=", key_len)) {
562  *dest = info->name;
563  *dest_len = sizeof(info->name);
564  } else if (!strncmp(key, "DEFAULT=", key_len)) {
565  *dest = info->defaultr;
566  *dest_len = sizeof(info->defaultr);
567  } else if (!strncmp(key, "FORCED=", key_len)) {
568  *dest = info->forced;
569  *dest_len = sizeof(info->forced);
570  } else if (!strncmp(key, "CHARACTERISTICS=", key_len)) {
571  *dest = info->characteristics;
572  *dest_len = sizeof(info->characteristics);
573  }
574  /*
575  * ignored:
576  * - AUTOSELECT: client may autoselect based on e.g. system language
577  * - INSTREAM-ID: EIA-608 closed caption number ("CC1".."CC4")
578  */
579 }
580 
581 /* used by parse_playlist to allocate a new variant+playlist when the
582  * playlist is detected to be a Media Playlist (not Master Playlist)
583  * and we have no parent Master Playlist (parsing of which would have
584  * allocated the variant and playlist already)
585  * *pls == NULL => Master Playlist or parentless Media Playlist
586  * *pls != NULL => parented Media Playlist, playlist+variant allocated */
587 static int ensure_playlist(HLSContext *c, struct playlist **pls, const char *url)
588 {
589  if (*pls)
590  return 0;
591  if (!new_variant(c, NULL, url, NULL))
592  return AVERROR(ENOMEM);
593  *pls = c->playlists[c->n_playlists - 1];
594  return 0;
595 }
596 
598  const char *url)
599 {
600 #if !CONFIG_HTTP_PROTOCOL
602 #else
603  int ret;
604  URLContext *uc = ffio_geturlcontext(*pb);
605  av_assert0(uc);
606  (*pb)->eof_reached = 0;
607  ret = ff_http_do_new_request(uc, url);
608  if (ret < 0) {
609  ff_format_io_close(s, pb);
610  }
611  return ret;
612 #endif
613 }
614 
615 static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url,
616  AVDictionary *opts, AVDictionary *opts2, int *is_http_out)
617 {
618  HLSContext *c = s->priv_data;
619  AVDictionary *tmp = NULL;
620  const char *proto_name = NULL;
621  int ret;
622  int is_http = 0;
623 
624  av_dict_copy(&tmp, opts, 0);
625  av_dict_copy(&tmp, opts2, 0);
626 
627  if (av_strstart(url, "crypto", NULL)) {
628  if (url[6] == '+' || url[6] == ':')
629  proto_name = avio_find_protocol_name(url + 7);
630  }
631 
632  if (!proto_name)
633  proto_name = avio_find_protocol_name(url);
634 
635  if (!proto_name)
636  return AVERROR_INVALIDDATA;
637 
638  // only http(s) & file are allowed
639  if (av_strstart(proto_name, "file", NULL)) {
640  if (strcmp(c->allowed_extensions, "ALL") && !av_match_ext(url, c->allowed_extensions)) {
641  av_log(s, AV_LOG_ERROR,
642  "Filename extension of \'%s\' is not a common multimedia extension, blocked for security reasons.\n"
643  "If you wish to override this adjust allowed_extensions, you can set it to \'ALL\' to allow all\n",
644  url);
645  return AVERROR_INVALIDDATA;
646  }
647  } else if (av_strstart(proto_name, "http", NULL)) {
648  is_http = 1;
649  } else
650  return AVERROR_INVALIDDATA;
651 
652  if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':')
653  ;
654  else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':')
655  ;
656  else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))
657  return AVERROR_INVALIDDATA;
658 
659  if (is_http && c->http_persistent && *pb) {
660  ret = open_url_keepalive(c->ctx, pb, url);
661  if (ret == AVERROR_EXIT) {
662  return ret;
663  } else if (ret < 0) {
664  if (ret != AVERROR_EOF)
666  "keepalive request failed for '%s' when opening url, retrying with new connection: %s\n",
667  url, av_err2str(ret));
668  ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
669  }
670  } else {
671  ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
672  }
673  if (ret >= 0) {
674  // update cookies on http response with setcookies.
675  char *new_cookies = NULL;
676 
677  if (!(s->flags & AVFMT_FLAG_CUSTOM_IO))
678  av_opt_get(*pb, "cookies", AV_OPT_SEARCH_CHILDREN, (uint8_t**)&new_cookies);
679 
680  if (new_cookies)
681  av_dict_set(&opts, "cookies", new_cookies, AV_DICT_DONT_STRDUP_VAL);
682  }
683 
684  av_dict_free(&tmp);
685 
686  if (is_http_out)
687  *is_http_out = is_http;
688 
689  return ret;
690 }
691 
692 static int parse_playlist(HLSContext *c, const char *url,
693  struct playlist *pls, AVIOContext *in)
694 {
695  int ret = 0, is_segment = 0, is_variant = 0;
696  int64_t duration = 0;
697  enum KeyType key_type = KEY_NONE;
698  uint8_t iv[16] = "";
699  int has_iv = 0;
700  char key[MAX_URL_SIZE] = "";
701  char line[MAX_URL_SIZE];
702  const char *ptr;
703  int close_in = 0;
704  int64_t seg_offset = 0;
705  int64_t seg_size = -1;
706  uint8_t *new_url = NULL;
707  struct variant_info variant_info;
708  char tmp_str[MAX_URL_SIZE];
709  struct segment *cur_init_section = NULL;
710  int is_http = av_strstart(url, "http", NULL);
711  struct segment **prev_segments = NULL;
712  int prev_n_segments = 0;
713  int prev_start_seq_no = -1;
714 
715  if (is_http && !in && c->http_persistent && c->playlist_pb) {
716  in = c->playlist_pb;
717  ret = open_url_keepalive(c->ctx, &c->playlist_pb, url);
718  if (ret == AVERROR_EXIT) {
719  return ret;
720  } else if (ret < 0) {
721  if (ret != AVERROR_EOF)
723  "keepalive request failed for '%s' when parsing playlist, retrying with new connection: %s\n",
724  url, av_err2str(ret));
725  in = NULL;
726  }
727  }
728 
729  if (!in) {
731  av_dict_copy(&opts, c->avio_opts, 0);
732 
733  if (c->http_persistent)
734  av_dict_set(&opts, "multiple_requests", "1", 0);
735 
736  ret = c->ctx->io_open(c->ctx, &in, url, AVIO_FLAG_READ, &opts);
737  av_dict_free(&opts);
738  if (ret < 0)
739  return ret;
740 
741  if (is_http && c->http_persistent)
742  c->playlist_pb = in;
743  else
744  close_in = 1;
745  }
746 
747  if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >= 0)
748  url = new_url;
749 
750  ff_get_chomp_line(in, line, sizeof(line));
751  if (strcmp(line, "#EXTM3U")) {
752  ret = AVERROR_INVALIDDATA;
753  goto fail;
754  }
755 
756  if (pls) {
757  prev_start_seq_no = pls->start_seq_no;
758  prev_segments = pls->segments;
759  prev_n_segments = pls->n_segments;
760  pls->segments = NULL;
761  pls->n_segments = 0;
762 
763  pls->finished = 0;
764  pls->type = PLS_TYPE_UNSPECIFIED;
765  }
766  while (!avio_feof(in)) {
767  ff_get_chomp_line(in, line, sizeof(line));
768  if (av_strstart(line, "#EXT-X-STREAM-INF:", &ptr)) {
769  is_variant = 1;
770  memset(&variant_info, 0, sizeof(variant_info));
772  &variant_info);
773  } else if (av_strstart(line, "#EXT-X-KEY:", &ptr)) {
774  struct key_info info = {{0}};
776  &info);
777  key_type = KEY_NONE;
778  has_iv = 0;
779  if (!strcmp(info.method, "AES-128"))
780  key_type = KEY_AES_128;
781  if (!strcmp(info.method, "SAMPLE-AES"))
782  key_type = KEY_SAMPLE_AES;
783  if (!strncmp(info.iv, "0x", 2) || !strncmp(info.iv, "0X", 2)) {
784  ff_hex_to_data(iv, info.iv + 2);
785  has_iv = 1;
786  }
787  av_strlcpy(key, info.uri, sizeof(key));
788  } else if (av_strstart(line, "#EXT-X-MEDIA:", &ptr)) {
789  struct rendition_info info = {{0}};
791  &info);
792  new_rendition(c, &info, url);
793  } else if (av_strstart(line, "#EXT-X-TARGETDURATION:", &ptr)) {
794  ret = ensure_playlist(c, &pls, url);
795  if (ret < 0)
796  goto fail;
797  pls->target_duration = strtoll(ptr, NULL, 10) * AV_TIME_BASE;
798  } else if (av_strstart(line, "#EXT-X-MEDIA-SEQUENCE:", &ptr)) {
799  ret = ensure_playlist(c, &pls, url);
800  if (ret < 0)
801  goto fail;
802  pls->start_seq_no = atoi(ptr);
803  } else if (av_strstart(line, "#EXT-X-PLAYLIST-TYPE:", &ptr)) {
804  ret = ensure_playlist(c, &pls, url);
805  if (ret < 0)
806  goto fail;
807  if (!strcmp(ptr, "EVENT"))
808  pls->type = PLS_TYPE_EVENT;
809  else if (!strcmp(ptr, "VOD"))
810  pls->type = PLS_TYPE_VOD;
811  } else if (av_strstart(line, "#EXT-X-MAP:", &ptr)) {
812  struct init_section_info info = {{0}};
813  ret = ensure_playlist(c, &pls, url);
814  if (ret < 0)
815  goto fail;
817  &info);
818  cur_init_section = new_init_section(pls, &info, url);
819  cur_init_section->key_type = key_type;
820  if (has_iv) {
821  memcpy(cur_init_section->iv, iv, sizeof(iv));
822  } else {
823  int seq = pls->start_seq_no + pls->n_segments;
824  memset(cur_init_section->iv, 0, sizeof(cur_init_section->iv));
825  AV_WB32(cur_init_section->iv + 12, seq);
826  }
827 
828  if (key_type != KEY_NONE) {
829  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, key);
830  cur_init_section->key = av_strdup(tmp_str);
831  if (!cur_init_section->key) {
832  av_free(cur_init_section);
833  ret = AVERROR(ENOMEM);
834  goto fail;
835  }
836  } else {
837  cur_init_section->key = NULL;
838  }
839 
840  } else if (av_strstart(line, "#EXT-X-ENDLIST", &ptr)) {
841  if (pls)
842  pls->finished = 1;
843  } else if (av_strstart(line, "#EXTINF:", &ptr)) {
844  is_segment = 1;
845  duration = atof(ptr) * AV_TIME_BASE;
846  } else if (av_strstart(line, "#EXT-X-BYTERANGE:", &ptr)) {
847  seg_size = strtoll(ptr, NULL, 10);
848  ptr = strchr(ptr, '@');
849  if (ptr)
850  seg_offset = strtoll(ptr+1, NULL, 10);
851  } else if (av_strstart(line, "#", NULL)) {
852  av_log(c->ctx, AV_LOG_INFO, "Skip ('%s')\n", line);
853  continue;
854  } else if (line[0]) {
855  if (is_variant) {
856  if (!new_variant(c, &variant_info, line, url)) {
857  ret = AVERROR(ENOMEM);
858  goto fail;
859  }
860  is_variant = 0;
861  }
862  if (is_segment) {
863  struct segment *seg;
864  if (!pls) {
865  if (!new_variant(c, 0, url, NULL)) {
866  ret = AVERROR(ENOMEM);
867  goto fail;
868  }
869  pls = c->playlists[c->n_playlists - 1];
870  }
871  seg = av_malloc(sizeof(struct segment));
872  if (!seg) {
873  ret = AVERROR(ENOMEM);
874  goto fail;
875  }
876  seg->duration = duration;
877  seg->key_type = key_type;
878  if (has_iv) {
879  memcpy(seg->iv, iv, sizeof(iv));
880  } else {
881  int seq = pls->start_seq_no + pls->n_segments;
882  memset(seg->iv, 0, sizeof(seg->iv));
883  AV_WB32(seg->iv + 12, seq);
884  }
885 
886  if (key_type != KEY_NONE) {
887  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, key);
888  seg->key = av_strdup(tmp_str);
889  if (!seg->key) {
890  av_free(seg);
891  ret = AVERROR(ENOMEM);
892  goto fail;
893  }
894  } else {
895  seg->key = NULL;
896  }
897 
898  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, line);
899  seg->url = av_strdup(tmp_str);
900  if (!seg->url) {
901  av_free(seg->key);
902  av_free(seg);
903  ret = AVERROR(ENOMEM);
904  goto fail;
905  }
906 
907  dynarray_add(&pls->segments, &pls->n_segments, seg);
908  is_segment = 0;
909 
910  seg->size = seg_size;
911  if (seg_size >= 0) {
912  seg->url_offset = seg_offset;
913  seg_offset += seg_size;
914  seg_size = -1;
915  } else {
916  seg->url_offset = 0;
917  seg_offset = 0;
918  }
919 
920  seg->init_section = cur_init_section;
921  }
922  }
923  }
924  if (prev_segments) {
925  if (pls->start_seq_no > prev_start_seq_no && c->first_timestamp != AV_NOPTS_VALUE) {
926  int64_t prev_timestamp = c->first_timestamp;
927  int i, diff = pls->start_seq_no - prev_start_seq_no;
928  for (i = 0; i < prev_n_segments && i < diff; i++) {
929  c->first_timestamp += prev_segments[i]->duration;
930  }
931  av_log(c->ctx, AV_LOG_DEBUG, "Media sequence change (%d -> %d)"
932  " reflected in first_timestamp: %"PRId64" -> %"PRId64"\n",
933  prev_start_seq_no, pls->start_seq_no,
934  prev_timestamp, c->first_timestamp);
935  } else if (pls->start_seq_no < prev_start_seq_no) {
936  av_log(c->ctx, AV_LOG_WARNING, "Media sequence changed unexpectedly: %d -> %d\n",
937  prev_start_seq_no, pls->start_seq_no);
938  }
939  free_segment_dynarray(prev_segments, prev_n_segments);
940  av_freep(&prev_segments);
941  }
942  if (pls)
944 
945 fail:
946  av_free(new_url);
947  if (close_in)
948  ff_format_io_close(c->ctx, &in);
949  c->ctx->ctx_flags = c->ctx->ctx_flags & ~(unsigned)AVFMTCTX_UNSEEKABLE;
950  if (!c->n_variants || !c->variants[0]->n_playlists ||
951  !(c->variants[0]->playlists[0]->finished ||
952  c->variants[0]->playlists[0]->type == PLS_TYPE_EVENT))
954  return ret;
955 }
956 
957 static struct segment *current_segment(struct playlist *pls)
958 {
959  return pls->segments[pls->cur_seq_no - pls->start_seq_no];
960 }
961 
962 static struct segment *next_segment(struct playlist *pls)
963 {
964  int n = pls->cur_seq_no - pls->start_seq_no + 1;
965  if (n >= pls->n_segments)
966  return NULL;
967  return pls->segments[n];
968 }
969 
970 static int read_from_url(struct playlist *pls, struct segment *seg,
971  uint8_t *buf, int buf_size)
972 {
973  int ret;
974 
975  /* limit read if the segment was only a part of a file */
976  if (seg->size >= 0)
977  buf_size = FFMIN(buf_size, seg->size - pls->cur_seg_offset);
978 
979  ret = avio_read(pls->input, buf, buf_size);
980  if (ret > 0)
981  pls->cur_seg_offset += ret;
982 
983  return ret;
984 }
985 
986 /* Parse the raw ID3 data and pass contents to caller */
988  AVDictionary **metadata, int64_t *dts,
989  ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta **extra_meta)
990 {
991  static const char id3_priv_owner_ts[] = "com.apple.streaming.transportStreamTimestamp";
992  ID3v2ExtraMeta *meta;
993 
994  ff_id3v2_read_dict(pb, metadata, ID3v2_DEFAULT_MAGIC, extra_meta);
995  for (meta = *extra_meta; meta; meta = meta->next) {
996  if (!strcmp(meta->tag, "PRIV")) {
997  ID3v2ExtraMetaPRIV *priv = meta->data;
998  if (priv->datasize == 8 && !strcmp(priv->owner, id3_priv_owner_ts)) {
999  /* 33-bit MPEG timestamp */
1000  int64_t ts = AV_RB64(priv->data);
1001  av_log(s, AV_LOG_DEBUG, "HLS ID3 audio timestamp %"PRId64"\n", ts);
1002  if ((ts & ~((1ULL << 33) - 1)) == 0)
1003  *dts = ts;
1004  else
1005  av_log(s, AV_LOG_ERROR, "Invalid HLS ID3 audio timestamp %"PRId64"\n", ts);
1006  }
1007  } else if (!strcmp(meta->tag, "APIC") && apic)
1008  *apic = meta->data;
1009  }
1010 }
1011 
1012 /* Check if the ID3 metadata contents have changed */
1013 static int id3_has_changed_values(struct playlist *pls, AVDictionary *metadata,
1014  ID3v2ExtraMetaAPIC *apic)
1015 {
1016  AVDictionaryEntry *entry = NULL;
1017  AVDictionaryEntry *oldentry;
1018  /* check that no keys have changed values */
1019  while ((entry = av_dict_get(metadata, "", entry, AV_DICT_IGNORE_SUFFIX))) {
1020  oldentry = av_dict_get(pls->id3_initial, entry->key, NULL, AV_DICT_MATCH_CASE);
1021  if (!oldentry || strcmp(oldentry->value, entry->value) != 0)
1022  return 1;
1023  }
1024 
1025  /* check if apic appeared */
1026  if (apic && (pls->ctx->nb_streams != 2 || !pls->ctx->streams[1]->attached_pic.data))
1027  return 1;
1028 
1029  if (apic) {
1030  int size = pls->ctx->streams[1]->attached_pic.size;
1031  if (size != apic->buf->size - AV_INPUT_BUFFER_PADDING_SIZE)
1032  return 1;
1033 
1034  if (memcmp(apic->buf->data, pls->ctx->streams[1]->attached_pic.data, size) != 0)
1035  return 1;
1036  }
1037 
1038  return 0;
1039 }
1040 
1041 /* Parse ID3 data and handle the found data */
1042 static void handle_id3(AVIOContext *pb, struct playlist *pls)
1043 {
1044  AVDictionary *metadata = NULL;
1045  ID3v2ExtraMetaAPIC *apic = NULL;
1046  ID3v2ExtraMeta *extra_meta = NULL;
1047  int64_t timestamp = AV_NOPTS_VALUE;
1048 
1049  parse_id3(pls->ctx, pb, &metadata, &timestamp, &apic, &extra_meta);
1050 
1051  if (timestamp != AV_NOPTS_VALUE) {
1052  pls->id3_mpegts_timestamp = timestamp;
1053  pls->id3_offset = 0;
1054  }
1055 
1056  if (!pls->id3_found) {
1057  /* initial ID3 tags */
1059  pls->id3_found = 1;
1060 
1061  /* get picture attachment and set text metadata */
1062  if (pls->ctx->nb_streams)
1063  ff_id3v2_parse_apic(pls->ctx, &extra_meta);
1064  else
1065  /* demuxer not yet opened, defer picture attachment */
1066  pls->id3_deferred_extra = extra_meta;
1067 
1068  ff_id3v2_parse_priv_dict(&metadata, &extra_meta);
1069  av_dict_copy(&pls->ctx->metadata, metadata, 0);
1070  pls->id3_initial = metadata;
1071 
1072  } else {
1073  if (!pls->id3_changed && id3_has_changed_values(pls, metadata, apic)) {
1074  avpriv_report_missing_feature(pls->ctx, "Changing ID3 metadata in HLS audio elementary stream");
1075  pls->id3_changed = 1;
1076  }
1077  av_dict_free(&metadata);
1078  }
1079 
1080  if (!pls->id3_deferred_extra)
1081  ff_id3v2_free_extra_meta(&extra_meta);
1082 }
1083 
1084 static void intercept_id3(struct playlist *pls, uint8_t *buf,
1085  int buf_size, int *len)
1086 {
1087  /* intercept id3 tags, we do not want to pass them to the raw
1088  * demuxer on all segment switches */
1089  int bytes;
1090  int id3_buf_pos = 0;
1091  int fill_buf = 0;
1092  struct segment *seg = current_segment(pls);
1093 
1094  /* gather all the id3 tags */
1095  while (1) {
1096  /* see if we can retrieve enough data for ID3 header */
1097  if (*len < ID3v2_HEADER_SIZE && buf_size >= ID3v2_HEADER_SIZE) {
1098  bytes = read_from_url(pls, seg, buf + *len, ID3v2_HEADER_SIZE - *len);
1099  if (bytes > 0) {
1100 
1101  if (bytes == ID3v2_HEADER_SIZE - *len)
1102  /* no EOF yet, so fill the caller buffer again after
1103  * we have stripped the ID3 tags */
1104  fill_buf = 1;
1105 
1106  *len += bytes;
1107 
1108  } else if (*len <= 0) {
1109  /* error/EOF */
1110  *len = bytes;
1111  fill_buf = 0;
1112  }
1113  }
1114 
1115  if (*len < ID3v2_HEADER_SIZE)
1116  break;
1117 
1118  if (ff_id3v2_match(buf, ID3v2_DEFAULT_MAGIC)) {
1119  int64_t maxsize = seg->size >= 0 ? seg->size : 1024*1024;
1120  int taglen = ff_id3v2_tag_len(buf);
1121  int tag_got_bytes = FFMIN(taglen, *len);
1122  int remaining = taglen - tag_got_bytes;
1123 
1124  if (taglen > maxsize) {
1125  av_log(pls->ctx, AV_LOG_ERROR, "Too large HLS ID3 tag (%d > %"PRId64" bytes)\n",
1126  taglen, maxsize);
1127  break;
1128  }
1129 
1130  /*
1131  * Copy the id3 tag to our temporary id3 buffer.
1132  * We could read a small id3 tag directly without memcpy, but
1133  * we would still need to copy the large tags, and handling
1134  * both of those cases together with the possibility for multiple
1135  * tags would make the handling a bit complex.
1136  */
1137  pls->id3_buf = av_fast_realloc(pls->id3_buf, &pls->id3_buf_size, id3_buf_pos + taglen);
1138  if (!pls->id3_buf)
1139  break;
1140  memcpy(pls->id3_buf + id3_buf_pos, buf, tag_got_bytes);
1141  id3_buf_pos += tag_got_bytes;
1142 
1143  /* strip the intercepted bytes */
1144  *len -= tag_got_bytes;
1145  memmove(buf, buf + tag_got_bytes, *len);
1146  av_log(pls->ctx, AV_LOG_DEBUG, "Stripped %d HLS ID3 bytes\n", tag_got_bytes);
1147 
1148  if (remaining > 0) {
1149  /* read the rest of the tag in */
1150  if (read_from_url(pls, seg, pls->id3_buf + id3_buf_pos, remaining) != remaining)
1151  break;
1152  id3_buf_pos += remaining;
1153  av_log(pls->ctx, AV_LOG_DEBUG, "Stripped additional %d HLS ID3 bytes\n", remaining);
1154  }
1155 
1156  } else {
1157  /* no more ID3 tags */
1158  break;
1159  }
1160  }
1161 
1162  /* re-fill buffer for the caller unless EOF */
1163  if (*len >= 0 && (fill_buf || *len == 0)) {
1164  bytes = read_from_url(pls, seg, buf + *len, buf_size - *len);
1165 
1166  /* ignore error if we already had some data */
1167  if (bytes >= 0)
1168  *len += bytes;
1169  else if (*len == 0)
1170  *len = bytes;
1171  }
1172 
1173  if (pls->id3_buf) {
1174  /* Now parse all the ID3 tags */
1175  AVIOContext id3ioctx;
1176  ffio_init_context(&id3ioctx, pls->id3_buf, id3_buf_pos, 0, NULL, NULL, NULL, NULL);
1177  handle_id3(&id3ioctx, pls);
1178  }
1179 
1180  if (pls->is_id3_timestamped == -1)
1182 }
1183 
1184 static int open_input(HLSContext *c, struct playlist *pls, struct segment *seg, AVIOContext **in)
1185 {
1186  AVDictionary *opts = NULL;
1187  int ret;
1188  int is_http = 0;
1189 
1190  if (c->http_persistent)
1191  av_dict_set(&opts, "multiple_requests", "1", 0);
1192 
1193  if (seg->size >= 0) {
1194  /* try to restrict the HTTP request to the part we want
1195  * (if this is in fact a HTTP request) */
1196  av_dict_set_int(&opts, "offset", seg->url_offset, 0);
1197  av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
1198  }
1199 
1200  av_log(pls->parent, AV_LOG_VERBOSE, "HLS request for url '%s', offset %"PRId64", playlist %d\n",
1201  seg->url, seg->url_offset, pls->index);
1202 
1203  if (seg->key_type == KEY_NONE) {
1204  ret = open_url(pls->parent, in, seg->url, c->avio_opts, opts, &is_http);
1205  } else if (seg->key_type == KEY_AES_128) {
1206  char iv[33], key[33], url[MAX_URL_SIZE];
1207  if (strcmp(seg->key, pls->key_url)) {
1208  AVIOContext *pb = NULL;
1209  if (open_url(pls->parent, &pb, seg->key, c->avio_opts, opts, NULL) == 0) {
1210  ret = avio_read(pb, pls->key, sizeof(pls->key));
1211  if (ret != sizeof(pls->key)) {
1212  av_log(pls->parent, AV_LOG_ERROR, "Unable to read key file %s\n",
1213  seg->key);
1214  }
1215  ff_format_io_close(pls->parent, &pb);
1216  } else {
1217  av_log(pls->parent, AV_LOG_ERROR, "Unable to open key file %s\n",
1218  seg->key);
1219  }
1220  av_strlcpy(pls->key_url, seg->key, sizeof(pls->key_url));
1221  }
1222  ff_data_to_hex(iv, seg->iv, sizeof(seg->iv), 0);
1223  ff_data_to_hex(key, pls->key, sizeof(pls->key), 0);
1224  iv[32] = key[32] = '\0';
1225  if (strstr(seg->url, "://"))
1226  snprintf(url, sizeof(url), "crypto+%s", seg->url);
1227  else
1228  snprintf(url, sizeof(url), "crypto:%s", seg->url);
1229 
1230  av_dict_set(&opts, "key", key, 0);
1231  av_dict_set(&opts, "iv", iv, 0);
1232 
1233  ret = open_url(pls->parent, in, url, c->avio_opts, opts, &is_http);
1234  if (ret < 0) {
1235  goto cleanup;
1236  }
1237  ret = 0;
1238  } else if (seg->key_type == KEY_SAMPLE_AES) {
1239  av_log(pls->parent, AV_LOG_ERROR,
1240  "SAMPLE-AES encryption is not supported yet\n");
1241  ret = AVERROR_PATCHWELCOME;
1242  }
1243  else
1244  ret = AVERROR(ENOSYS);
1245 
1246  /* Seek to the requested position. If this was a HTTP request, the offset
1247  * should already be where want it to, but this allows e.g. local testing
1248  * without a HTTP server.
1249  *
1250  * This is not done for HTTP at all as avio_seek() does internal bookkeeping
1251  * of file offset which is out-of-sync with the actual offset when "offset"
1252  * AVOption is used with http protocol, causing the seek to not be a no-op
1253  * as would be expected. Wrong offset received from the server will not be
1254  * noticed without the call, though.
1255  */
1256  if (ret == 0 && !is_http && seg->key_type == KEY_NONE && seg->url_offset) {
1257  int64_t seekret = avio_seek(*in, seg->url_offset, SEEK_SET);
1258  if (seekret < 0) {
1259  av_log(pls->parent, AV_LOG_ERROR, "Unable to seek to offset %"PRId64" of HLS segment '%s'\n", seg->url_offset, seg->url);
1260  ret = seekret;
1261  ff_format_io_close(pls->parent, in);
1262  }
1263  }
1264 
1265 cleanup:
1266  av_dict_free(&opts);
1267  pls->cur_seg_offset = 0;
1268  return ret;
1269 }
1270 
1271 static int update_init_section(struct playlist *pls, struct segment *seg)
1272 {
1273  static const int max_init_section_size = 1024*1024;
1274  HLSContext *c = pls->parent->priv_data;
1275  int64_t sec_size;
1276  int64_t urlsize;
1277  int ret;
1278 
1279  if (seg->init_section == pls->cur_init_section)
1280  return 0;
1281 
1282  pls->cur_init_section = NULL;
1283 
1284  if (!seg->init_section)
1285  return 0;
1286 
1287  ret = open_input(c, pls, seg->init_section, &pls->input);
1288  if (ret < 0) {
1290  "Failed to open an initialization section in playlist %d\n",
1291  pls->index);
1292  return ret;
1293  }
1294 
1295  if (seg->init_section->size >= 0)
1296  sec_size = seg->init_section->size;
1297  else if ((urlsize = avio_size(pls->input)) >= 0)
1298  sec_size = urlsize;
1299  else
1300  sec_size = max_init_section_size;
1301 
1302  av_log(pls->parent, AV_LOG_DEBUG,
1303  "Downloading an initialization section of size %"PRId64"\n",
1304  sec_size);
1305 
1306  sec_size = FFMIN(sec_size, max_init_section_size);
1307 
1308  av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size);
1309 
1310  ret = read_from_url(pls, seg->init_section, pls->init_sec_buf,
1311  pls->init_sec_buf_size);
1312  ff_format_io_close(pls->parent, &pls->input);
1313 
1314  if (ret < 0)
1315  return ret;
1316 
1317  pls->cur_init_section = seg->init_section;
1318  pls->init_sec_data_len = ret;
1319  pls->init_sec_buf_read_offset = 0;
1320 
1321  /* spec says audio elementary streams do not have media initialization
1322  * sections, so there should be no ID3 timestamps */
1323  pls->is_id3_timestamped = 0;
1324 
1325  return 0;
1326 }
1327 
1328 static int64_t default_reload_interval(struct playlist *pls)
1329 {
1330  return pls->n_segments > 0 ?
1331  pls->segments[pls->n_segments - 1]->duration :
1332  pls->target_duration;
1333 }
1334 
1335 static int playlist_needed(struct playlist *pls)
1336 {
1337  AVFormatContext *s = pls->parent;
1338  int i, j;
1339  int stream_needed = 0;
1340  int first_st;
1341 
1342  /* If there is no context or streams yet, the playlist is needed */
1343  if (!pls->ctx || !pls->n_main_streams)
1344  return 1;
1345 
1346  /* check if any of the streams in the playlist are needed */
1347  for (i = 0; i < pls->n_main_streams; i++) {
1348  if (pls->main_streams[i]->discard < AVDISCARD_ALL) {
1349  stream_needed = 1;
1350  break;
1351  }
1352  }
1353 
1354  /* If all streams in the playlist were discarded, the playlist is not
1355  * needed (regardless of whether whole programs are discarded or not). */
1356  if (!stream_needed)
1357  return 0;
1358 
1359  /* Otherwise, check if all the programs (variants) this playlist is in are
1360  * discarded. Since all streams in the playlist are part of the same programs
1361  * we can just check the programs of the first stream. */
1362 
1363  first_st = pls->main_streams[0]->index;
1364 
1365  for (i = 0; i < s->nb_programs; i++) {
1366  AVProgram *program = s->programs[i];
1367  if (program->discard < AVDISCARD_ALL) {
1368  for (j = 0; j < program->nb_stream_indexes; j++) {
1369  if (program->stream_index[j] == first_st) {
1370  /* playlist is in an undiscarded program */
1371  return 1;
1372  }
1373  }
1374  }
1375  }
1376 
1377  /* some streams were not discarded but all the programs were */
1378  return 0;
1379 }
1380 
1381 static int read_data(void *opaque, uint8_t *buf, int buf_size)
1382 {
1383  struct playlist *v = opaque;
1384  HLSContext *c = v->parent->priv_data;
1385  int ret;
1386  int just_opened = 0;
1387  int reload_count = 0;
1388  struct segment *seg;
1389 
1390 restart:
1391  if (!v->needed)
1392  return AVERROR_EOF;
1393 
1394  if (!v->input || (c->http_persistent && v->input_read_done)) {
1395  int64_t reload_interval;
1396 
1397  /* Check that the playlist is still needed before opening a new
1398  * segment. */
1399  v->needed = playlist_needed(v);
1400 
1401  if (!v->needed) {
1402  av_log(v->parent, AV_LOG_INFO, "No longer receiving playlist %d ('%s')\n",
1403  v->index, v->url);
1404  return AVERROR_EOF;
1405  }
1406 
1407  /* If this is a live stream and the reload interval has elapsed since
1408  * the last playlist reload, reload the playlists now. */
1409  reload_interval = default_reload_interval(v);
1410 
1411 reload:
1412  reload_count++;
1413  if (reload_count > c->max_reload)
1414  return AVERROR_EOF;
1415  if (!v->finished &&
1416  av_gettime_relative() - v->last_load_time >= reload_interval) {
1417  if ((ret = parse_playlist(c, v->url, v, NULL)) < 0) {
1418  if (ret != AVERROR_EXIT)
1419  av_log(v->parent, AV_LOG_WARNING, "Failed to reload playlist %d\n",
1420  v->index);
1421  return ret;
1422  }
1423  /* If we need to reload the playlist again below (if
1424  * there's still no more segments), switch to a reload
1425  * interval of half the target duration. */
1426  reload_interval = v->target_duration / 2;
1427  }
1428  if (v->cur_seq_no < v->start_seq_no) {
1430  "skipping %d segments ahead, expired from playlists\n",
1431  v->start_seq_no - v->cur_seq_no);
1432  v->cur_seq_no = v->start_seq_no;
1433  }
1434  if (v->cur_seq_no >= v->start_seq_no + v->n_segments) {
1435  if (v->finished)
1436  return AVERROR_EOF;
1437  while (av_gettime_relative() - v->last_load_time < reload_interval) {
1439  return AVERROR_EXIT;
1440  av_usleep(100*1000);
1441  }
1442  /* Enough time has elapsed since the last reload */
1443  goto reload;
1444  }
1445 
1446  v->input_read_done = 0;
1447  seg = current_segment(v);
1448 
1449  /* load/update Media Initialization Section, if any */
1450  ret = update_init_section(v, seg);
1451  if (ret)
1452  return ret;
1453 
1454  if (c->http_multiple == 1 && v->input_next_requested) {
1455  FFSWAP(AVIOContext *, v->input, v->input_next);
1456  v->input_next_requested = 0;
1457  ret = 0;
1458  } else {
1459  ret = open_input(c, v, seg, &v->input);
1460  }
1461  if (ret < 0) {
1463  return AVERROR_EXIT;
1464  av_log(v->parent, AV_LOG_WARNING, "Failed to open segment %d of playlist %d\n",
1465  v->cur_seq_no,
1466  v->index);
1467  v->cur_seq_no += 1;
1468  goto reload;
1469  }
1470  just_opened = 1;
1471  }
1472 
1473  if (c->http_multiple == -1) {
1474  uint8_t *http_version_opt = NULL;
1475  int r = av_opt_get(v->input, "http_version", AV_OPT_SEARCH_CHILDREN, &http_version_opt);
1476  if (r >= 0) {
1477  c->http_multiple = (!strncmp((const char *)http_version_opt, "1.1", 3) || !strncmp((const char *)http_version_opt, "2.0", 3));
1478  av_freep(&http_version_opt);
1479  }
1480  }
1481 
1482  seg = next_segment(v);
1483  if (c->http_multiple == 1 && !v->input_next_requested &&
1484  seg && seg->key_type == KEY_NONE && av_strstart(seg->url, "http", NULL)) {
1485  ret = open_input(c, v, seg, &v->input_next);
1486  if (ret < 0) {
1488  return AVERROR_EXIT;
1489  av_log(v->parent, AV_LOG_WARNING, "Failed to open segment %d of playlist %d\n",
1490  v->cur_seq_no + 1,
1491  v->index);
1492  } else {
1493  v->input_next_requested = 1;
1494  }
1495  }
1496 
1498  /* Push init section out first before first actual segment */
1499  int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size);
1500  memcpy(buf, v->init_sec_buf, copy_size);
1501  v->init_sec_buf_read_offset += copy_size;
1502  return copy_size;
1503  }
1504 
1505  seg = current_segment(v);
1506  ret = read_from_url(v, seg, buf, buf_size);
1507  if (ret > 0) {
1508  if (just_opened && v->is_id3_timestamped != 0) {
1509  /* Intercept ID3 tags here, elementary audio streams are required
1510  * to convey timestamps using them in the beginning of each segment. */
1511  intercept_id3(v, buf, buf_size, &ret);
1512  }
1513 
1514  return ret;
1515  }
1516  if (c->http_persistent &&
1517  seg->key_type == KEY_NONE && av_strstart(seg->url, "http", NULL)) {
1518  v->input_read_done = 1;
1519  } else {
1520  ff_format_io_close(v->parent, &v->input);
1521  }
1522  v->cur_seq_no++;
1523 
1524  c->cur_seq_no = v->cur_seq_no;
1525 
1526  goto restart;
1527 }
1528 
1529 static void add_renditions_to_variant(HLSContext *c, struct variant *var,
1530  enum AVMediaType type, const char *group_id)
1531 {
1532  int i;
1533 
1534  for (i = 0; i < c->n_renditions; i++) {
1535  struct rendition *rend = c->renditions[i];
1536 
1537  if (rend->type == type && !strcmp(rend->group_id, group_id)) {
1538 
1539  if (rend->playlist)
1540  /* rendition is an external playlist
1541  * => add the playlist to the variant */
1542  dynarray_add(&var->playlists, &var->n_playlists, rend->playlist);
1543  else
1544  /* rendition is part of the variant main Media Playlist
1545  * => add the rendition to the main Media Playlist */
1546  dynarray_add(&var->playlists[0]->renditions,
1547  &var->playlists[0]->n_renditions,
1548  rend);
1549  }
1550  }
1551 }
1552 
1554  enum AVMediaType type)
1555 {
1556  int rend_idx = 0;
1557  int i;
1558 
1559  for (i = 0; i < pls->n_main_streams; i++) {
1560  AVStream *st = pls->main_streams[i];
1561 
1562  if (st->codecpar->codec_type != type)
1563  continue;
1564 
1565  for (; rend_idx < pls->n_renditions; rend_idx++) {
1566  struct rendition *rend = pls->renditions[rend_idx];
1567 
1568  if (rend->type != type)
1569  continue;
1570 
1571  if (rend->language[0])
1572  av_dict_set(&st->metadata, "language", rend->language, 0);
1573  if (rend->name[0])
1574  av_dict_set(&st->metadata, "comment", rend->name, 0);
1575 
1576  st->disposition |= rend->disposition;
1577  }
1578  if (rend_idx >=pls->n_renditions)
1579  break;
1580  }
1581 }
1582 
1583 /* if timestamp was in valid range: returns 1 and sets seq_no
1584  * if not: returns 0 and sets seq_no to closest segment */
1586  int64_t timestamp, int *seq_no)
1587 {
1588  int i;
1589  int64_t pos = c->first_timestamp == AV_NOPTS_VALUE ?
1590  0 : c->first_timestamp;
1591 
1592  if (timestamp < pos) {
1593  *seq_no = pls->start_seq_no;
1594  return 0;
1595  }
1596 
1597  for (i = 0; i < pls->n_segments; i++) {
1598  int64_t diff = pos + pls->segments[i]->duration - timestamp;
1599  if (diff > 0) {
1600  *seq_no = pls->start_seq_no + i;
1601  return 1;
1602  }
1603  pos += pls->segments[i]->duration;
1604  }
1605 
1606  *seq_no = pls->start_seq_no + pls->n_segments - 1;
1607 
1608  return 0;
1609 }
1610 
1611 static int select_cur_seq_no(HLSContext *c, struct playlist *pls)
1612 {
1613  int seq_no;
1614 
1615  if (!pls->finished && !c->first_packet &&
1617  /* reload the playlist since it was suspended */
1618  parse_playlist(c, pls->url, pls, NULL);
1619 
1620  /* If playback is already in progress (we are just selecting a new
1621  * playlist) and this is a complete file, find the matching segment
1622  * by counting durations. */
1623  if (pls->finished && c->cur_timestamp != AV_NOPTS_VALUE) {
1624  find_timestamp_in_playlist(c, pls, c->cur_timestamp, &seq_no);
1625  return seq_no;
1626  }
1627 
1628  if (!pls->finished) {
1629  if (!c->first_packet && /* we are doing a segment selection during playback */
1630  c->cur_seq_no >= pls->start_seq_no &&
1631  c->cur_seq_no < pls->start_seq_no + pls->n_segments)
1632  /* While spec 3.4.3 says that we cannot assume anything about the
1633  * content at the same sequence number on different playlists,
1634  * in practice this seems to work and doing it otherwise would
1635  * require us to download a segment to inspect its timestamps. */
1636  return c->cur_seq_no;
1637 
1638  /* If this is a live stream, start live_start_index segments from the
1639  * start or end */
1640  if (c->live_start_index < 0)
1641  return pls->start_seq_no + FFMAX(pls->n_segments + c->live_start_index, 0);
1642  else
1643  return pls->start_seq_no + FFMIN(c->live_start_index, pls->n_segments - 1);
1644  }
1645 
1646  /* Otherwise just start on the first segment. */
1647  return pls->start_seq_no;
1648 }
1649 
1651 {
1652  HLSContext *c = s->priv_data;
1653  static const char * const opts[] = {
1654  "headers", "http_proxy", "user_agent", "cookies", "referer", "rw_timeout", NULL };
1655  const char * const * opt = opts;
1656  uint8_t *buf;
1657  int ret = 0;
1658 
1659  while (*opt) {
1660  if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN | AV_OPT_ALLOW_NULL, &buf) >= 0) {
1661  ret = av_dict_set(&c->avio_opts, *opt, buf,
1663  if (ret < 0)
1664  return ret;
1665  }
1666  opt++;
1667  }
1668 
1669  return ret;
1670 }
1671 
1672 static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url,
1673  int flags, AVDictionary **opts)
1674 {
1675  av_log(s, AV_LOG_ERROR,
1676  "A HLS playlist item '%s' referred to an external file '%s'. "
1677  "Opening this file was forbidden for security reasons\n",
1678  s->url, url);
1679  return AVERROR(EPERM);
1680 }
1681 
1682 static void add_stream_to_programs(AVFormatContext *s, struct playlist *pls, AVStream *stream)
1683 {
1684  HLSContext *c = s->priv_data;
1685  int i, j;
1686  int bandwidth = -1;
1687 
1688  for (i = 0; i < c->n_variants; i++) {
1689  struct variant *v = c->variants[i];
1690 
1691  for (j = 0; j < v->n_playlists; j++) {
1692  if (v->playlists[j] != pls)
1693  continue;
1694 
1695  av_program_add_stream_index(s, i, stream->index);
1696 
1697  if (bandwidth < 0)
1698  bandwidth = v->bandwidth;
1699  else if (bandwidth != v->bandwidth)
1700  bandwidth = -1; /* stream in multiple variants with different bandwidths */
1701  }
1702  }
1703 
1704  if (bandwidth >= 0)
1705  av_dict_set_int(&stream->metadata, "variant_bitrate", bandwidth, 0);
1706 }
1707 
1709 {
1710  int err;
1711 
1712  err = avcodec_parameters_copy(st->codecpar, ist->codecpar);
1713  if (err < 0)
1714  return err;
1715 
1716  if (pls->is_id3_timestamped) /* custom timestamps via id3 */
1717  avpriv_set_pts_info(st, 33, 1, MPEG_TIME_BASE);
1718  else
1720 
1721  st->internal->need_context_update = 1;
1722 
1723  return 0;
1724 }
1725 
1726 /* add new subdemuxer streams to our context, if any */
1728 {
1729  int err;
1730 
1731  while (pls->n_main_streams < pls->ctx->nb_streams) {
1732  int ist_idx = pls->n_main_streams;
1733  AVStream *st = avformat_new_stream(s, NULL);
1734  AVStream *ist = pls->ctx->streams[ist_idx];
1735 
1736  if (!st)
1737  return AVERROR(ENOMEM);
1738 
1739  st->id = pls->index;
1740  dynarray_add(&pls->main_streams, &pls->n_main_streams, st);
1741 
1742  add_stream_to_programs(s, pls, st);
1743 
1744  err = set_stream_info_from_input_stream(st, pls, ist);
1745  if (err < 0)
1746  return err;
1747  }
1748 
1749  return 0;
1750 }
1751 
1753 {
1754  HLSContext *c = s->priv_data;
1755  int flag_needed = 0;
1756  int i;
1757 
1758  for (i = 0; i < c->n_playlists; i++) {
1759  struct playlist *pls = c->playlists[i];
1760 
1761  if (pls->has_noheader_flag) {
1762  flag_needed = 1;
1763  break;
1764  }
1765  }
1766 
1767  if (flag_needed)
1769  else
1771 }
1772 
1774 {
1775  HLSContext *c = s->priv_data;
1776 
1777  free_playlist_list(c);
1778  free_variant_list(c);
1780 
1781  av_dict_free(&c->avio_opts);
1783 
1784  return 0;
1785 }
1786 
1788 {
1789  HLSContext *c = s->priv_data;
1790  int ret = 0, i;
1791  int highest_cur_seq_no = 0;
1792 
1793  c->ctx = s;
1795 
1796  c->first_packet = 1;
1799 
1800  if ((ret = save_avio_options(s)) < 0)
1801  goto fail;
1802 
1803  /* Some HLS servers don't like being sent the range header */
1804  av_dict_set(&c->avio_opts, "seekable", "0", 0);
1805 
1806  if ((ret = parse_playlist(c, s->url, NULL, s->pb)) < 0)
1807  goto fail;
1808 
1809  if (c->n_variants == 0) {
1810  av_log(s, AV_LOG_WARNING, "Empty playlist\n");
1811  ret = AVERROR_EOF;
1812  goto fail;
1813  }
1814  /* If the playlist only contained playlists (Master Playlist),
1815  * parse each individual playlist. */
1816  if (c->n_playlists > 1 || c->playlists[0]->n_segments == 0) {
1817  for (i = 0; i < c->n_playlists; i++) {
1818  struct playlist *pls = c->playlists[i];
1819  if ((ret = parse_playlist(c, pls->url, pls, NULL)) < 0)
1820  goto fail;
1821  }
1822  }
1823 
1824  if (c->variants[0]->playlists[0]->n_segments == 0) {
1825  av_log(s, AV_LOG_WARNING, "Empty segment\n");
1826  ret = AVERROR_EOF;
1827  goto fail;
1828  }
1829 
1830  /* If this isn't a live stream, calculate the total duration of the
1831  * stream. */
1832  if (c->variants[0]->playlists[0]->finished) {
1833  int64_t duration = 0;
1834  for (i = 0; i < c->variants[0]->playlists[0]->n_segments; i++)
1835  duration += c->variants[0]->playlists[0]->segments[i]->duration;
1836  s->duration = duration;
1837  }
1838 
1839  /* Associate renditions with variants */
1840  for (i = 0; i < c->n_variants; i++) {
1841  struct variant *var = c->variants[i];
1842 
1843  if (var->audio_group[0])
1845  if (var->video_group[0])
1847  if (var->subtitles_group[0])
1849  }
1850 
1851  /* Create a program for each variant */
1852  for (i = 0; i < c->n_variants; i++) {
1853  struct variant *v = c->variants[i];
1854  AVProgram *program;
1855 
1856  program = av_new_program(s, i);
1857  if (!program)
1858  goto fail;
1859  av_dict_set_int(&program->metadata, "variant_bitrate", v->bandwidth, 0);
1860  }
1861 
1862  /* Select the starting segments */
1863  for (i = 0; i < c->n_playlists; i++) {
1864  struct playlist *pls = c->playlists[i];
1865 
1866  if (pls->n_segments == 0)
1867  continue;
1868 
1869  pls->cur_seq_no = select_cur_seq_no(c, pls);
1870  highest_cur_seq_no = FFMAX(highest_cur_seq_no, pls->cur_seq_no);
1871  }
1872 
1873  /* Open the demuxer for each playlist */
1874  for (i = 0; i < c->n_playlists; i++) {
1875  struct playlist *pls = c->playlists[i];
1876  ff_const59 AVInputFormat *in_fmt = NULL;
1877 
1878  if (!(pls->ctx = avformat_alloc_context())) {
1879  ret = AVERROR(ENOMEM);
1880  goto fail;
1881  }
1882 
1883  if (pls->n_segments == 0)
1884  continue;
1885 
1886  pls->index = i;
1887  pls->needed = 1;
1888  pls->parent = s;
1889 
1890  /*
1891  * If this is a live stream and this playlist looks like it is one segment
1892  * behind, try to sync it up so that every substream starts at the same
1893  * time position (so e.g. avformat_find_stream_info() will see packets from
1894  * all active streams within the first few seconds). This is not very generic,
1895  * though, as the sequence numbers are technically independent.
1896  */
1897  if (!pls->finished && pls->cur_seq_no == highest_cur_seq_no - 1 &&
1898  highest_cur_seq_no < pls->start_seq_no + pls->n_segments) {
1899  pls->cur_seq_no = highest_cur_seq_no;
1900  }
1901 
1903  if (!pls->read_buffer){
1904  ret = AVERROR(ENOMEM);
1905  avformat_free_context(pls->ctx);
1906  pls->ctx = NULL;
1907  goto fail;
1908  }
1909  ffio_init_context(&pls->pb, pls->read_buffer, INITIAL_BUFFER_SIZE, 0, pls,
1910  read_data, NULL, NULL);
1911  pls->pb.seekable = 0;
1912  ret = av_probe_input_buffer(&pls->pb, &in_fmt, pls->segments[0]->url,
1913  NULL, 0, 0);
1914  if (ret < 0) {
1915  /* Free the ctx - it isn't initialized properly at this point,
1916  * so avformat_close_input shouldn't be called. If
1917  * avformat_open_input fails below, it frees and zeros the
1918  * context, so it doesn't need any special treatment like this. */
1919  av_log(s, AV_LOG_ERROR, "Error when loading first segment '%s'\n", pls->segments[0]->url);
1920  avformat_free_context(pls->ctx);
1921  pls->ctx = NULL;
1922  goto fail;
1923  }
1924  pls->ctx->pb = &pls->pb;
1925  pls->ctx->io_open = nested_io_open;
1926  pls->ctx->flags |= s->flags & ~AVFMT_FLAG_CUSTOM_IO;
1927 
1928  if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
1929  goto fail;
1930 
1931  ret = avformat_open_input(&pls->ctx, pls->segments[0]->url, in_fmt, NULL);
1932  if (ret < 0)
1933  goto fail;
1934 
1935  if (pls->id3_deferred_extra && pls->ctx->nb_streams == 1) {
1940  pls->id3_deferred_extra = NULL;
1941  }
1942 
1943  if (pls->is_id3_timestamped == -1)
1944  av_log(s, AV_LOG_WARNING, "No expected HTTP requests have been made\n");
1945 
1946  /*
1947  * For ID3 timestamped raw audio streams we need to detect the packet
1948  * durations to calculate timestamps in fill_timing_for_id3_timestamped_stream(),
1949  * but for other streams we can rely on our user calling avformat_find_stream_info()
1950  * on us if they want to.
1951  */
1952  if (pls->is_id3_timestamped || (pls->n_renditions > 0 && pls->renditions[0]->type == AVMEDIA_TYPE_AUDIO)) {
1953  ret = avformat_find_stream_info(pls->ctx, NULL);
1954  if (ret < 0)
1955  goto fail;
1956  }
1957 
1958  pls->has_noheader_flag = !!(pls->ctx->ctx_flags & AVFMTCTX_NOHEADER);
1959 
1960  /* Create new AVStreams for each stream in this playlist */
1961  ret = update_streams_from_subdemuxer(s, pls);
1962  if (ret < 0)
1963  goto fail;
1964 
1965  /*
1966  * Copy any metadata from playlist to main streams, but do not set
1967  * event flags.
1968  */
1969  if (pls->n_main_streams)
1970  av_dict_copy(&pls->main_streams[0]->metadata, pls->ctx->metadata, 0);
1971 
1975  }
1976 
1978 
1979  return 0;
1980 fail:
1981  hls_close(s);
1982  return ret;
1983 }
1984 
1985 static int recheck_discard_flags(AVFormatContext *s, int first)
1986 {
1987  HLSContext *c = s->priv_data;
1988  int i, changed = 0;
1989  int cur_needed;
1990 
1991  /* Check if any new streams are needed */
1992  for (i = 0; i < c->n_playlists; i++) {
1993  struct playlist *pls = c->playlists[i];
1994 
1995  cur_needed = playlist_needed(c->playlists[i]);
1996 
1997  if (cur_needed && !pls->needed) {
1998  pls->needed = 1;
1999  changed = 1;
2000  pls->cur_seq_no = select_cur_seq_no(c, pls);
2001  pls->pb.eof_reached = 0;
2002  if (c->cur_timestamp != AV_NOPTS_VALUE) {
2003  /* catch up */
2004  pls->seek_timestamp = c->cur_timestamp;
2005  pls->seek_flags = AVSEEK_FLAG_ANY;
2006  pls->seek_stream_index = -1;
2007  }
2008  av_log(s, AV_LOG_INFO, "Now receiving playlist %d, segment %d\n", i, pls->cur_seq_no);
2009  } else if (first && !cur_needed && pls->needed) {
2010  if (pls->input)
2011  ff_format_io_close(pls->parent, &pls->input);
2012  pls->input_read_done = 0;
2013  if (pls->input_next)
2014  ff_format_io_close(pls->parent, &pls->input_next);
2015  pls->input_next_requested = 0;
2016  pls->needed = 0;
2017  changed = 1;
2018  av_log(s, AV_LOG_INFO, "No longer receiving playlist %d\n", i);
2019  }
2020  }
2021  return changed;
2022 }
2023 
2025 {
2026  if (pls->id3_offset >= 0) {
2027  pls->pkt.dts = pls->id3_mpegts_timestamp +
2028  av_rescale_q(pls->id3_offset,
2029  pls->ctx->streams[pls->pkt.stream_index]->time_base,
2031  if (pls->pkt.duration)
2032  pls->id3_offset += pls->pkt.duration;
2033  else
2034  pls->id3_offset = -1;
2035  } else {
2036  /* there have been packets with unknown duration
2037  * since the last id3 tag, should not normally happen */
2038  pls->pkt.dts = AV_NOPTS_VALUE;
2039  }
2040 
2041  if (pls->pkt.duration)
2042  pls->pkt.duration = av_rescale_q(pls->pkt.duration,
2043  pls->ctx->streams[pls->pkt.stream_index]->time_base,
2045 
2046  pls->pkt.pts = AV_NOPTS_VALUE;
2047 }
2048 
2049 static AVRational get_timebase(struct playlist *pls)
2050 {
2051  if (pls->is_id3_timestamped)
2052  return MPEG_TIME_BASE_Q;
2053 
2054  return pls->ctx->streams[pls->pkt.stream_index]->time_base;
2055 }
2056 
2057 static int compare_ts_with_wrapdetect(int64_t ts_a, struct playlist *pls_a,
2058  int64_t ts_b, struct playlist *pls_b)
2059 {
2060  int64_t scaled_ts_a = av_rescale_q(ts_a, get_timebase(pls_a), MPEG_TIME_BASE_Q);
2061  int64_t scaled_ts_b = av_rescale_q(ts_b, get_timebase(pls_b), MPEG_TIME_BASE_Q);
2062 
2063  return av_compare_mod(scaled_ts_a, scaled_ts_b, 1LL << 33);
2064 }
2065 
2067 {
2068  HLSContext *c = s->priv_data;
2069  int ret, i, minplaylist = -1;
2070 
2072  c->first_packet = 0;
2073 
2074  for (i = 0; i < c->n_playlists; i++) {
2075  struct playlist *pls = c->playlists[i];
2076  /* Make sure we've got one buffered packet from each open playlist
2077  * stream */
2078  if (pls->needed && !pls->pkt.data) {
2079  while (1) {
2080  int64_t ts_diff;
2081  AVRational tb;
2082  ret = av_read_frame(pls->ctx, &pls->pkt);
2083  if (ret < 0) {
2084  if (!avio_feof(&pls->pb) && ret != AVERROR_EOF)
2085  return ret;
2086  reset_packet(&pls->pkt);
2087  break;
2088  } else {
2089  /* stream_index check prevents matching picture attachments etc. */
2090  if (pls->is_id3_timestamped && pls->pkt.stream_index == 0) {
2091  /* audio elementary streams are id3 timestamped */
2093  }
2094 
2095  if (c->first_timestamp == AV_NOPTS_VALUE &&
2096  pls->pkt.dts != AV_NOPTS_VALUE)
2097  c->first_timestamp = av_rescale_q(pls->pkt.dts,
2099  }
2100 
2101  if (pls->seek_timestamp == AV_NOPTS_VALUE)
2102  break;
2103 
2104  if (pls->seek_stream_index < 0 ||
2105  pls->seek_stream_index == pls->pkt.stream_index) {
2106 
2107  if (pls->pkt.dts == AV_NOPTS_VALUE) {
2109  break;
2110  }
2111 
2112  tb = get_timebase(pls);
2113  ts_diff = av_rescale_rnd(pls->pkt.dts, AV_TIME_BASE,
2114  tb.den, AV_ROUND_DOWN) -
2115  pls->seek_timestamp;
2116  if (ts_diff >= 0 && (pls->seek_flags & AVSEEK_FLAG_ANY ||
2117  pls->pkt.flags & AV_PKT_FLAG_KEY)) {
2119  break;
2120  }
2121  }
2122  av_packet_unref(&pls->pkt);
2123  reset_packet(&pls->pkt);
2124  }
2125  }
2126  /* Check if this stream has the packet with the lowest dts */
2127  if (pls->pkt.data) {
2128  struct playlist *minpls = minplaylist < 0 ?
2129  NULL : c->playlists[minplaylist];
2130  if (minplaylist < 0) {
2131  minplaylist = i;
2132  } else {
2133  int64_t dts = pls->pkt.dts;
2134  int64_t mindts = minpls->pkt.dts;
2135 
2136  if (dts == AV_NOPTS_VALUE ||
2137  (mindts != AV_NOPTS_VALUE && compare_ts_with_wrapdetect(dts, pls, mindts, minpls) < 0))
2138  minplaylist = i;
2139  }
2140  }
2141  }
2142 
2143  /* If we got a packet, return it */
2144  if (minplaylist >= 0) {
2145  struct playlist *pls = c->playlists[minplaylist];
2146  AVStream *ist;
2147  AVStream *st;
2148 
2149  ret = update_streams_from_subdemuxer(s, pls);
2150  if (ret < 0) {
2151  av_packet_unref(&pls->pkt);
2152  reset_packet(&pls->pkt);
2153  return ret;
2154  }
2155 
2156  // If sub-demuxer reports updated metadata, copy it to the first stream
2157  // and set its AVSTREAM_EVENT_FLAG_METADATA_UPDATED flag.
2159  if (pls->n_main_streams) {
2160  st = pls->main_streams[0];
2161  av_dict_copy(&st->metadata, pls->ctx->metadata, 0);
2163  }
2165  }
2166 
2167  /* check if noheader flag has been cleared by the subdemuxer */
2168  if (pls->has_noheader_flag && !(pls->ctx->ctx_flags & AVFMTCTX_NOHEADER)) {
2169  pls->has_noheader_flag = 0;
2171  }
2172 
2173  if (pls->pkt.stream_index >= pls->n_main_streams) {
2174  av_log(s, AV_LOG_ERROR, "stream index inconsistency: index %d, %d main streams, %d subdemuxer streams\n",
2175  pls->pkt.stream_index, pls->n_main_streams, pls->ctx->nb_streams);
2176  av_packet_unref(&pls->pkt);
2177  reset_packet(&pls->pkt);
2178  return AVERROR_BUG;
2179  }
2180 
2181  ist = pls->ctx->streams[pls->pkt.stream_index];
2182  st = pls->main_streams[pls->pkt.stream_index];
2183 
2184  *pkt = pls->pkt;
2185  pkt->stream_index = st->index;
2186  reset_packet(&c->playlists[minplaylist]->pkt);
2187 
2188  if (pkt->dts != AV_NOPTS_VALUE)
2189  c->cur_timestamp = av_rescale_q(pkt->dts,
2190  ist->time_base,
2191  AV_TIME_BASE_Q);
2192 
2193  /* There may be more situations where this would be useful, but this at least
2194  * handles newly probed codecs properly (i.e. request_probe by mpegts). */
2195  if (ist->codecpar->codec_id != st->codecpar->codec_id) {
2196  ret = set_stream_info_from_input_stream(st, pls, ist);
2197  if (ret < 0) {
2198  av_packet_unref(pkt);
2199  return ret;
2200  }
2201  }
2202 
2203  return 0;
2204  }
2205  return AVERROR_EOF;
2206 }
2207 
2208 static int hls_read_seek(AVFormatContext *s, int stream_index,
2209  int64_t timestamp, int flags)
2210 {
2211  HLSContext *c = s->priv_data;
2212  struct playlist *seek_pls = NULL;
2213  int i, seq_no;
2214  int j;
2215  int stream_subdemuxer_index;
2216  int64_t first_timestamp, seek_timestamp, duration;
2217 
2218  if ((flags & AVSEEK_FLAG_BYTE) || (c->ctx->ctx_flags & AVFMTCTX_UNSEEKABLE))
2219  return AVERROR(ENOSYS);
2220 
2221  first_timestamp = c->first_timestamp == AV_NOPTS_VALUE ?
2222  0 : c->first_timestamp;
2223 
2224  seek_timestamp = av_rescale_rnd(timestamp, AV_TIME_BASE,
2225  s->streams[stream_index]->time_base.den,
2226  flags & AVSEEK_FLAG_BACKWARD ?
2228 
2229  duration = s->duration == AV_NOPTS_VALUE ?
2230  0 : s->duration;
2231 
2232  if (0 < duration && duration < seek_timestamp - first_timestamp)
2233  return AVERROR(EIO);
2234 
2235  /* find the playlist with the specified stream */
2236  for (i = 0; i < c->n_playlists; i++) {
2237  struct playlist *pls = c->playlists[i];
2238  for (j = 0; j < pls->n_main_streams; j++) {
2239  if (pls->main_streams[j] == s->streams[stream_index]) {
2240  seek_pls = pls;
2241  stream_subdemuxer_index = j;
2242  break;
2243  }
2244  }
2245  }
2246  /* check if the timestamp is valid for the playlist with the
2247  * specified stream index */
2248  if (!seek_pls || !find_timestamp_in_playlist(c, seek_pls, seek_timestamp, &seq_no))
2249  return AVERROR(EIO);
2250 
2251  /* set segment now so we do not need to search again below */
2252  seek_pls->cur_seq_no = seq_no;
2253  seek_pls->seek_stream_index = stream_subdemuxer_index;
2254 
2255  for (i = 0; i < c->n_playlists; i++) {
2256  /* Reset reading */
2257  struct playlist *pls = c->playlists[i];
2258  if (pls->input)
2259  ff_format_io_close(pls->parent, &pls->input);
2260  pls->input_read_done = 0;
2261  if (pls->input_next)
2262  ff_format_io_close(pls->parent, &pls->input_next);
2263  pls->input_next_requested = 0;
2264  av_packet_unref(&pls->pkt);
2265  reset_packet(&pls->pkt);
2266  pls->pb.eof_reached = 0;
2267  /* Clear any buffered data */
2268  pls->pb.buf_end = pls->pb.buf_ptr = pls->pb.buffer;
2269  /* Reset the pos, to let the mpegts demuxer know we've seeked. */
2270  pls->pb.pos = 0;
2271  /* Flush the packet queue of the subdemuxer. */
2272  ff_read_frame_flush(pls->ctx);
2273 
2275  pls->seek_flags = flags;
2276 
2277  if (pls != seek_pls) {
2278  /* set closest segment seq_no for playlists not handled above */
2279  find_timestamp_in_playlist(c, pls, seek_timestamp, &pls->cur_seq_no);
2280  /* seek the playlist to the given position without taking
2281  * keyframes into account since this playlist does not have the
2282  * specified stream where we should look for the keyframes */
2283  pls->seek_stream_index = -1;
2284  pls->seek_flags |= AVSEEK_FLAG_ANY;
2285  }
2286  }
2287 
2289 
2290  return 0;
2291 }
2292 
2293 static int hls_probe(const AVProbeData *p)
2294 {
2295  /* Require #EXTM3U at the start, and either one of the ones below
2296  * somewhere for a proper match. */
2297  if (strncmp(p->buf, "#EXTM3U", 7))
2298  return 0;
2299 
2300  if (strstr(p->buf, "#EXT-X-STREAM-INF:") ||
2301  strstr(p->buf, "#EXT-X-TARGETDURATION:") ||
2302  strstr(p->buf, "#EXT-X-MEDIA-SEQUENCE:"))
2303  return AVPROBE_SCORE_MAX;
2304  return 0;
2305 }
2306 
2307 #define OFFSET(x) offsetof(HLSContext, x)
2308 #define FLAGS AV_OPT_FLAG_DECODING_PARAM
2309 static const AVOption hls_options[] = {
2310  {"live_start_index", "segment index to start live streams at (negative values are from the end)",
2311  OFFSET(live_start_index), AV_OPT_TYPE_INT, {.i64 = -3}, INT_MIN, INT_MAX, FLAGS},
2312  {"allowed_extensions", "List of file extensions that hls is allowed to access",
2313  OFFSET(allowed_extensions), AV_OPT_TYPE_STRING,
2314  {.str = "3gp,aac,avi,flac,mkv,m3u8,m4a,m4s,m4v,mpg,mov,mp2,mp3,mp4,mpeg,mpegts,ogg,ogv,oga,ts,vob,wav"},
2315  INT_MIN, INT_MAX, FLAGS},
2316  {"max_reload", "Maximum number of times a insufficient list is attempted to be reloaded",
2317  OFFSET(max_reload), AV_OPT_TYPE_INT, {.i64 = 1000}, 0, INT_MAX, FLAGS},
2318  {"http_persistent", "Use persistent HTTP connections",
2319  OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS },
2320  {"http_multiple", "Use multiple HTTP connections for fetching segments",
2321  OFFSET(http_multiple), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, FLAGS},
2322  {NULL}
2323 };
2324 
2325 static const AVClass hls_class = {
2326  .class_name = "hls demuxer",
2327  .item_name = av_default_item_name,
2328  .option = hls_options,
2329  .version = LIBAVUTIL_VERSION_INT,
2330 };
2331 
2333  .name = "hls",
2334  .long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
2335  .priv_class = &hls_class,
2336  .priv_data_size = sizeof(HLSContext),
2338  .read_probe = hls_probe,
2341  .read_close = hls_close,
2343 };
const char * name
Definition: avisynth_c.h:867
#define FF_COMPLIANCE_EXPERIMENTAL
Allow nonstandardized experimental things.
Definition: avcodec.h:2633
#define AVSEEK_FLAG_BACKWARD
Definition: avformat.h:2511
int(* io_open)(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **options)
A callback for opening new IO streams.
Definition: avformat.h:1940
uint8_t key[16]
Definition: hls.c:131
#define NULL
Definition: coverity.c:32
static int update_init_section(struct playlist *pls, struct segment *seg)
Definition: hls.c:1271
int needed
Definition: hls.c:118
struct segment * init_section
Definition: hls.c:77
void ff_make_absolute_url(char *buf, int size, const char *base, const char *rel)
Convert a relative url into an absolute url, given a base url.
Definition: url.c:80
void * data
Definition: id3v2.h:59
Bytestream IO Context.
Definition: avio.h:161
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:336
int bandwidth
Definition: hls.c:178
static int read_from_url(struct playlist *pls, struct segment *seg, uint8_t *buf, int buf_size)
Definition: hls.c:970
#define AVSTREAM_EVENT_FLAG_METADATA_UPDATED
The call resulted in updated metadata.
Definition: avformat.h:995
Definition: hls.c:93
char assoc_language[MAX_FIELD_LEN]
Definition: hls.c:452
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1636
AVDictionary * id3_initial
Definition: hls.c:140
AVOption.
Definition: opt.h:246
static int set_stream_info_from_input_stream(AVStream *st, struct playlist *pls, AVStream *ist)
Definition: hls.c:1708
struct segment ** init_sections
Definition: hls.c:159
static void handle_init_section_args(struct init_section_info *info, const char *key, int key_len, char **dest, int *dest_len)
Definition: hls.c:435
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
unsigned int id3_buf_size
Definition: hls.c:139
ID3v2ExtraMeta * id3_deferred_extra
Definition: hls.c:143
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
unsigned char * buf_ptr
Current position in the buffer.
Definition: avio.h:228
unsigned char * buf_end
End of the data, may be less than buffer+buffer_size if the read function returned less data than req...
Definition: avio.h:229
#define AV_RB64
Definition: intreadwrite.h:164
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4886
int ff_copy_whiteblacklists(AVFormatContext *dst, const AVFormatContext *src)
Copies the whilelists from one context to the other.
Definition: utils.c:164
#define AVSEEK_FLAG_ANY
seek to any frame, even non-keyframes
Definition: avformat.h:2513
int event_flags
Flags for the user to detect events happening on the stream.
Definition: avformat.h:994
char forced[4]
Definition: hls.c:455
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
static struct rendition * new_rendition(HLSContext *c, struct rendition_info *info, const char *url_base)
Definition: hls.c:459
static int64_t default_reload_interval(struct playlist *pls)
Definition: hls.c:1328
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3957
int disposition
Definition: hls.c:174
unsigned int init_sec_data_len
Definition: hls.c:127
int num
Numerator.
Definition: rational.h:59
int index
stream index in AVFormatContext
Definition: avformat.h:882
int size
Definition: avcodec.h:1478
#define ID3v2_DEFAULT_MAGIC
Default magic bytes for ID3v2 header: "ID3".
Definition: id3v2.h:35
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:246
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
#define AVIO_FLAG_READ
read-only
Definition: avio.h:654
char language[MAX_FIELD_LEN]
Definition: hls.c:451
unsigned char * buffer
Start of the buffer.
Definition: avio.h:226
int has_noheader_flag
Definition: hls.c:105
int event_flags
Flags for the user to detect events happening on the file.
Definition: avformat.h:1673
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:217
#define AV_DISPOSITION_HEARING_IMPAIRED
stream for hearing impaired audiences
Definition: avformat.h:839
int avformat_open_input(AVFormatContext **ps, const char *url, ff_const59 AVInputFormat *fmt, AVDictionary **options)
Open an input stream and read the header.
Definition: utils.c:537
static void fill_buf(uint8_t *data, int w, int h, int linesize, uint8_t v)
char * key
Definition: hls.c:73
int av_usleep(unsigned usec)
Sleep for a period of time.
Definition: time.c:84
discard all
Definition: avcodec.h:811
static AVPacket pkt
static void handle_rendition_args(struct rendition_info *info, const char *key, int key_len, char **dest, int *dest_len)
Definition: hls.c:543
#define MAX_CHARACTERISTICS_LEN
Definition: hls.c:45
int av_probe_input_buffer(AVIOContext *pb, ff_const59 AVInputFormat **fmt, const char *url, void *logctx, unsigned int offset, unsigned int max_probe_size)
Like av_probe_input_buffer2() but returns 0 on success.
Definition: format.c:312
int ctx_flags
Flags signalling stream properties.
Definition: avformat.h:1407
int ff_id3v2_parse_apic(AVFormatContext *s, ID3v2ExtraMeta **extra_meta)
Create a stream for each APIC (attached picture) extracted from the ID3v2 header. ...
Definition: id3v2.c:1143
static void reset_packet(AVPacket *pkt)
Definition: hls.c:297
int strict_std_compliance
Allow non-standard and experimental extension.
Definition: avformat.h:1666
char * url
Definition: hls.c:72
uint8_t base
Definition: vp3data.h:202
int64_t url_offset
Definition: hls.c:70
static int id3_has_changed_values(struct playlist *pls, AVDictionary *metadata, ID3v2ExtraMetaAPIC *apic)
Definition: hls.c:1013
Format I/O context.
Definition: avformat.h:1358
#define MAX_URL_SIZE
Definition: internal.h:30
unsigned int nb_stream_indexes
Definition: avformat.h:1280
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
char method[11]
Definition: hls.c:374
void ff_read_frame_flush(AVFormatContext *s)
Flush the frame reader.
Definition: utils.c:1918
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
unsigned int init_sec_buf_read_offset
Definition: hls.c:128
Public dictionary API.
char type[16]
Definition: hls.c:448
int n_renditions
Definition: hls.c:196
#define ID3v2_HEADER_SIZE
Definition: id3v2.h:30
#define MPEG_TIME_BASE_Q
Definition: hls.c:48
enum AVMediaType type
Definition: hls.c:169
uint8_t iv[16]
Definition: hls.c:75
char defaultr[4]
Definition: hls.c:454
uint8_t
Round toward +infinity.
Definition: mathematics.h:83
int http_multiple
Definition: hls.c:209
int n_variants
Definition: hls.c:192
#define FLAGS
Definition: hls.c:2308
#define av_malloc(s)
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1302
AVOptions.
char group_id[MAX_FIELD_LEN]
Definition: hls.c:450
int64_t cur_seg_offset
Definition: hls.c:120
char audio[MAX_FIELD_LEN]
Definition: hls.c:323
static void free_rendition_list(HLSContext *c)
Definition: hls.c:284
#define AVFMTCTX_UNSEEKABLE
signal that the stream is definitely not seekable, and attempts to call the seek function will fail...
Definition: avformat.h:1305
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1495
static struct segment * next_segment(struct playlist *pls)
Definition: hls.c:962
int id
Format-specific stream ID.
Definition: avformat.h:888
uint8_t * read_buffer
Definition: hls.c:96
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5641
char url[MAX_URL_SIZE]
Definition: hls.c:94
static void intercept_id3(struct playlist *pls, uint8_t *buf, int buf_size, int *len)
Definition: hls.c:1084
static struct playlist * new_playlist(HLSContext *c, const char *url, const char *base)
Definition: hls.c:303
AVInputFormat ff_hls_demuxer
Definition: hls.c:2332
int ff_id3v2_parse_priv_dict(AVDictionary **metadata, ID3v2ExtraMeta **extra_meta)
Parse PRIV tags into a dictionary.
Definition: id3v2.c:1234
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4459
int finished
Definition: hls.c:112
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1426
static void handle_id3(AVIOContext *pb, struct playlist *pls)
Definition: hls.c:1042
int n_playlists
Definition: hls.c:194
AVFormatContext * avformat_alloc_context(void)
Allocate an AVFormatContext.
Definition: options.c:144
#define AVERROR_PROTOCOL_NOT_FOUND
Protocol not found.
Definition: error.h:63
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:40
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1489
uint8_t * data
Definition: avcodec.h:1477
AVProgram * av_new_program(AVFormatContext *s, int id)
Definition: utils.c:4558
static int read_data(void *opaque, uint8_t *buf, int buf_size)
Definition: hls.c:1381
#define AVERROR_EOF
End of file.
Definition: error.h:55
unsigned int init_sec_buf_size
Definition: hls.c:126
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
int input_next_requested
Definition: hls.c:100
int av_match_ext(const char *filename, const char *extensions)
Return a positive value if the given filename has one of the given extensions, 0 otherwise.
Definition: format.c:38
struct rendition ** renditions
Definition: hls.c:154
static int open_url_keepalive(AVFormatContext *s, AVIOContext **pb, const char *url)
Definition: hls.c:597
enum AVDiscard discard
selects which program to discard and which to feed to the caller
Definition: avformat.h:1278
static void add_metadata_from_renditions(AVFormatContext *s, struct playlist *pls, enum AVMediaType type)
Definition: hls.c:1553
unsigned int * stream_index
Definition: avformat.h:1279
#define av_log(a,...)
static void free_playlist_list(HLSContext *c)
Definition: hls.c:241
struct rendition ** renditions
Definition: hls.c:197
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:647
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1509
struct variant ** variants
Definition: hls.c:193
static void free_segment_dynarray(struct segment **segments, int n_segments)
Definition: hls.c:213
static AVRational get_timebase(struct playlist *pls)
Definition: hls.c:2049
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
Callback for checking whether to abort blocking functions.
Definition: avio.h:58
#define ff_const59
The ff_const59 define is not part of the public API and will be removed without further warning...
Definition: avformat.h:549
AVIOContext * playlist_pb
Definition: hls.c:210
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
Definition: utils.c:2021
AVStream ** main_streams
Definition: hls.c:109
static int compare_ts_with_wrapdetect(int64_t ts_a, struct playlist *pls_a, int64_t ts_b, struct playlist *pls_b)
Definition: hls.c:2057
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define AV_DICT_MATCH_CASE
Only get an entry with exact-case key match.
Definition: dict.h:69
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1598
char video_group[MAX_FIELD_LEN]
Definition: hls.c:185
int64_t cur_timestamp
Definition: hls.c:203
int n_renditions
Definition: hls.c:153
static const AVClass hls_class
Definition: hls.c:2325
AVIOInterruptCB * interrupt_callback
Definition: hls.c:204
char bandwidth[20]
Definition: hls.c:321
static void handle_key_args(struct key_info *info, const char *key, int key_len, char **dest, int *dest_len)
Definition: hls.c:378
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
char * url
input or output URL.
Definition: avformat.h:1454
const char * r
Definition: vf_curves.c:114
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
unsigned int nb_programs
Definition: avformat.h:1537
char byterange[32]
Definition: hls.c:395
int64_t id3_mpegts_timestamp
Definition: hls.c:136
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:203
static void free_segment_list(struct playlist *pls)
Definition: hls.c:223
int ff_id3v2_parse_priv(AVFormatContext *s, ID3v2ExtraMeta **extra_meta)
Add metadata for all PRIV tags in the ID3v2 header.
Definition: id3v2.c:1276
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3953
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1127
Definition: graph2dot.c:48
simple assert() macros that are a bit more flexible than ISO C assert().
static int update_streams_from_subdemuxer(AVFormatContext *s, struct playlist *pls)
Definition: hls.c:1727
int first_packet
Definition: hls.c:201
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
static int find_timestamp_in_playlist(HLSContext *c, struct playlist *pls, int64_t timestamp, int *seq_no)
Definition: hls.c:1585
uint8_t * data
Definition: id3v2.h:80
int64_t id3_offset
Definition: hls.c:137
int is_id3_timestamped
Definition: hls.c:135
New fields can be added to the end with minor version bumps.
Definition: avformat.h:1275
#define FFMAX(a, b)
Definition: common.h:94
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:83
#define fail()
Definition: checkasm.h:120
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1483
void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size)
Allocate a buffer, reusing the given one if large enough.
Definition: mem.c:500
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:448
int live_start_index
Definition: hls.c:200
Definition: hls.c:68
#define AV_DISPOSITION_FORCED
Track should be used during playback by default.
Definition: avformat.h:838
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1414
AVDictionary * opts
Definition: movenc.c:50
char group_id[MAX_FIELD_LEN]
Definition: hls.c:171
static struct segment * current_segment(struct playlist *pls)
Definition: hls.c:957
int n_main_streams
Definition: hls.c:110
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:260
#define dynarray_add(tab, nb_ptr, elem)
Definition: internal.h:198
static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **opts)
Definition: hls.c:1672
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:254
void av_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
#define FFMIN(a, b)
Definition: common.h:96
void(* ff_parse_key_val_cb)(void *context, const char *key, int key_len, char **dest, int *dest_len)
Callback function type for ff_parse_key_value.
Definition: internal.h:366
#define AV_OPT_SEARCH_CHILDREN
Search in possible children of the given object first.
Definition: opt.h:556
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that&#39;s been allocated with av_malloc() or another memory allocation functio...
Definition: dict.h:76
char * allowed_extensions
Definition: hls.c:206
int index
Definition: hls.c:102
AVIOContext * input_next
Definition: hls.c:99
static void add_renditions_to_variant(HLSContext *c, struct variant *var, enum AVMediaType type, const char *group_id)
Definition: hls.c:1529
uint8_t * init_sec_buf
Definition: hls.c:125
#define av_err2str(errnum)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: error.h:119
static int hls_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: hls.c:2066
uint8_t * id3_buf
Definition: hls.c:138
#define AVFMT_EVENT_FLAG_METADATA_UPDATED
The call resulted in updated metadata.
Definition: avformat.h:1674
Definition: hls.c:372
#define s(width, name)
Definition: cbs_vp9.c:257
static struct segment * new_init_section(struct playlist *pls, struct init_section_info *info, const char *url_base)
Definition: hls.c:398
void * av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)
Reallocate the given buffer if it is not large enough, otherwise do nothing.
Definition: mem.c:476
int n
Definition: avisynth_c.h:760
AVDictionary * metadata
Definition: avformat.h:945
static struct variant * new_variant(HLSContext *c, struct variant_info *info, const char *url, const char *base)
Definition: hls.c:328
#define AVFMT_FLAG_CUSTOM_IO
The caller has supplied a custom AVIOContext, don&#39;t avio_close() it.
Definition: avformat.h:1497
Usually treated as AVMEDIA_TYPE_DATA.
Definition: avutil.h:200
static void fill_timing_for_id3_timestamped_stream(struct playlist *pls)
Definition: hls.c:2024
struct segment ** segments
Definition: hls.c:117
#define AVERROR_EXIT
Immediate exit was requested; the called function should not be restarted.
Definition: error.h:56
int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding rnd)
Rescale a 64-bit integer with specified rounding.
Definition: mathematics.c:58
AVPacket pkt
Definition: hls.c:104
uint8_t * owner
Definition: id3v2.h:79
int input_read_done
Definition: hls.c:98
char subtitles_group[MAX_FIELD_LEN]
Definition: hls.c:186
char name[MAX_FIELD_LEN]
Definition: hls.c:453
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:530
#define AV_DISPOSITION_VISUAL_IMPAIRED
stream for visual impaired audiences
Definition: avformat.h:840
int64_t size
Definition: hls.c:71
enum KeyType key_type
Definition: hls.c:74
Stream structure.
Definition: avformat.h:881
int id3_changed
Definition: hls.c:142
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
int avformat_queue_attached_pictures(AVFormatContext *s)
Definition: utils.c:479
AVFormatContext * parent
Definition: hls.c:101
AVFormatContext * ctx
Definition: hls.c:191
static void parse_id3(AVFormatContext *s, AVIOContext *pb, AVDictionary **metadata, int64_t *dts, ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta **extra_meta)
Definition: hls.c:987
#define AV_DISPOSITION_DEFAULT
Definition: avformat.h:826
int64_t first_timestamp
Definition: hls.c:202
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:251
char subtitles[MAX_FIELD_LEN]
Definition: hls.c:325
AVStreamInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1238
struct ID3v2ExtraMeta * next
Definition: id3v2.h:60
int ff_check_interrupt(AVIOInterruptCB *cb)
Check if the user has requested to interrupt a blocking function associated with cb.
Definition: avio.c:664
enum PlaylistType type
Definition: hls.c:113
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
AVIOContext * pb
I/O context.
Definition: avformat.h:1400
static int parse_playlist(HLSContext *c, const char *url, struct playlist *pls, AVIOContext *in)
Definition: hls.c:692
int n_init_sections
Definition: hls.c:158
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:599
uint8_t * data
The data buffer.
Definition: buffer.h:89
static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url, AVDictionary *opts, AVDictionary *opts2, int *is_http_out)
Definition: hls.c:615
#define AVFMT_NOGENSEARCH
Format does not allow to fall back on generic search.
Definition: avformat.h:474
static const AVOption hls_options[]
Definition: hls.c:2309
static int hls_read_header(AVFormatContext *s)
Definition: hls.c:1787
void * buf
Definition: avisynth_c.h:766
Definition: url.h:38
int max_reload
Definition: hls.c:207
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:70
struct playlist ** playlists
Definition: hls.c:195
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:50
static int open_input(HLSContext *c, struct playlist *pls, struct segment *seg, AVIOContext **in)
Definition: hls.c:1184
int64_t last_load_time
Definition: hls.c:121
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) #define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac) { } void ff_audio_convert_free(AudioConvert **ac) { if(! *ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);} AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map) { AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method !=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt) > 2) { ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc) { av_free(ac);return NULL;} return ac;} in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar) { ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar ? ac->channels :1;} else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);return ac;} int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in) { int use_generic=1;int len=in->nb_samples;int p;if(ac->dc) { av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (dithered)\", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
Describe the class of an AVClass context structure.
Definition: log.h:67
static void update_noheader_flag(AVFormatContext *s)
Definition: hls.c:1752
#define AV_WB32(p, v)
Definition: intreadwrite.h:419
AVIOContext * input
Definition: hls.c:97
Rational number (pair of numerator and denominator).
Definition: rational.h:58
struct segment * cur_init_section
Definition: hls.c:124
int seek_stream_index
Definition: hls.c:147
PlaylistType
Definition: hls.c:82
int64_t target_duration
Definition: hls.c:114
static int save_avio_options(AVFormatContext *s)
Definition: hls.c:1650
#define AV_OPT_ALLOW_NULL
In av_opt_get, return NULL if the option has a pointer type and is set to NULL, rather than returning...
Definition: opt.h:571
#define AVSEEK_FLAG_BYTE
seeking based on position in bytes
Definition: avformat.h:2512
int need_context_update
Whether the internal avctx needs to be updated from codecpar (after a late change to codecpar) ...
Definition: internal.h:192
cl_device_type type
char uri[MAX_URL_SIZE]
Definition: hls.c:449
AVMediaType
Definition: avutil.h:199
int n_playlists
Definition: hls.c:181
struct playlist * playlist
Definition: hls.c:170
static void add_stream_to_programs(AVFormatContext *s, struct playlist *pls, AVStream *stream)
Definition: hls.c:1682
#define MPEG_TIME_BASE
Definition: hls.c:47
#define snprintf
Definition: snprintf.h:34
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:4393
This structure contains the data a format has to probe a file.
Definition: avformat.h:446
int ff_hex_to_data(uint8_t *data, const char *p)
Parse a string of hexadecimal strings.
Definition: utils.c:4858
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1768
Definition: hls.c:168
Round toward -infinity.
Definition: mathematics.h:82
static void handle_variant_args(struct variant_info *info, const char *key, int key_len, char **dest, int *dest_len)
Definition: hls.c:354
const char * avio_find_protocol_name(const char *url)
Return the name of the protocol that will handle the passed URL.
Definition: avio.c:473
int size
Size of data in bytes.
Definition: buffer.h:93
URLContext * ffio_geturlcontext(AVIOContext *s)
Return the URLContext associated with the AVIOContext.
Definition: aviobuf.c:1038
AVDictionary * metadata
Definition: avformat.h:1281
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
char audio_group[MAX_FIELD_LEN]
Definition: hls.c:184
int64_t av_gettime_relative(void)
Get the current time in microseconds since some unspecified starting point.
Definition: time.c:56
#define flags(name, subs,...)
Definition: cbs_av1.c:561
KeyType
Definition: hls.c:62
static int recheck_discard_flags(AVFormatContext *s, int first)
Definition: hls.c:1985
void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf, void *context)
Parse a string with comma-separated key=value pairs.
Definition: utils.c:4916
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
int ff_http_do_new_request(URLContext *h, const char *uri)
Send a new HTTP request, reusing the old connection.
Definition: http.c:308
int64_t seek_timestamp
Definition: hls.c:145
char iv[35]
Definition: hls.c:375
#define OFFSET(x)
Definition: hls.c:2307
char characteristics[MAX_CHARACTERISTICS_LEN]
Definition: hls.c:456
int seek_flags
Definition: hls.c:146
char * av_strtok(char *s, const char *delim, char **saveptr)
Split the string into several tokens which can be accessed by successive calls to av_strtok()...
Definition: avstring.c:184
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:458
int av_strstart(const char *str, const char *pfx, const char **ptr)
Return non-zero if pfx is a prefix of str.
Definition: avstring.c:34
char language[MAX_FIELD_LEN]
Definition: hls.c:172
AVIOContext pb
Definition: hls.c:95
Main libavformat public API header.
char uri[MAX_URL_SIZE]
Definition: hls.c:373
#define INITIAL_BUFFER_SIZE
Definition: hls.c:42
int ff_id3v2_match(const uint8_t *buf, const char *magic)
Detect ID3v2 Header.
Definition: id3v2.c:143
int ffio_init_context(AVIOContext *s, unsigned char *buffer, int buffer_size, int write_flag, void *opaque, int(*read_packet)(void *opaque, uint8_t *buf, int buf_size), int(*write_packet)(void *opaque, uint8_t *buf, int buf_size), int64_t(*seek)(void *opaque, int64_t offset, int whence))
Definition: aviobuf.c:81
#define MAX_FIELD_LEN
Definition: hls.c:44
static int playlist_needed(struct playlist *pls)
Definition: hls.c:1335
int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
Read packets of a media file to get stream information.
Definition: utils.c:3567
const char * tag
Definition: id3v2.h:58
static double c[64]
int cur_seq_no
Definition: hls.c:199
int av_dict_set_int(AVDictionary **pm, const char *key, int64_t value, int flags)
Convenience wrapper for av_dict_set that converts the value to a string and stores it...
Definition: dict.c:147
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:934
int64_t pos
position in the file of the current buffer
Definition: avio.h:238
int pts_wrap_bits
number of bits in pts (used for wrapping control)
Definition: avformat.h:1073
AVDictionary * avio_opts
Definition: hls.c:205
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:33
char * key
Definition: dict.h:86
int n_segments
Definition: hls.c:116
int den
Denominator.
Definition: rational.h:60
void avformat_close_input(AVFormatContext **s)
Close an opened input AVFormatContext.
Definition: utils.c:4431
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:790
int http_persistent
Definition: hls.c:208
static int ensure_playlist(HLSContext *c, struct playlist **pls, const char *url)
Definition: hls.c:587
static int hls_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: hls.c:2208
static av_always_inline int diff(const uint32_t a, const uint32_t b)
int av_opt_get(void *obj, const char *name, int search_flags, uint8_t **out_val)
Definition: opt.c:761
#define av_free(p)
int id3_found
Definition: hls.c:141
char name[MAX_FIELD_LEN]
Definition: hls.c:173
void ff_id3v2_read_dict(AVIOContext *pb, AVDictionary **metadata, const char *magic, ID3v2ExtraMeta **extra_meta)
Read an ID3v2 tag into specified dictionary and retrieve supported extra metadata.
Definition: id3v2.c:1115
char * value
Definition: dict.h:87
int eof_reached
true if was unable to read due to error or eof
Definition: avio.h:239
int len
int ff_id3v2_tag_len(const uint8_t *buf)
Get the length of an ID3v2 tag.
Definition: id3v2.c:156
void * priv_data
Format private data.
Definition: avformat.h:1386
static int hls_probe(const AVProbeData *p)
Definition: hls.c:2293
AVBufferRef * buf
Definition: id3v2.h:72
AVFormatContext * ctx
Definition: hls.c:103
uint32_t datasize
Definition: id3v2.h:81
struct playlist ** playlists
Definition: hls.c:182
Definition: hls.c:177
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1476
char video[MAX_FIELD_LEN]
Definition: hls.c:324
int64_t duration
Duration of the stream, in AV_TIME_BASE fractional seconds.
Definition: avformat.h:1473
#define av_freep(p)
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:654
#define AV_DICT_IGNORE_SUFFIX
Return first entry in a dictionary whose first part corresponds to the search key, ignoring the suffix of the found key string.
Definition: dict.h:70
char uri[MAX_URL_SIZE]
Definition: hls.c:394
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1028
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:358
#define FFSWAP(type, a, b)
Definition: common.h:99
int start_seq_no
Definition: hls.c:115
int stream_index
Definition: avcodec.h:1479
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:910
static void free_init_section_list(struct playlist *pls)
Definition: hls.c:230
int64_t duration
Definition: hls.c:69
static void free_variant_list(HLSContext *c)
Definition: hls.c:272
int ff_get_chomp_line(AVIOContext *s, char *buf, int maxlen)
Same as ff_get_line but strip the white-space characters in the text tail.
Definition: aviobuf.c:825
int cur_seq_no
Definition: hls.c:119
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:936
char key_url[MAX_URL_SIZE]
Definition: hls.c:130
static int hls_close(AVFormatContext *s)
Definition: hls.c:1773
char * ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase)
Definition: utils.c:4837
This structure stores compressed data.
Definition: avcodec.h:1454
Definition: hls.c:63
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1470
AVPacket attached_pic
For streams with AV_DISPOSITION_ATTACHED_PIC disposition, this packet will contain the attached pictu...
Definition: avformat.h:963
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
#define tb
Definition: regdef.h:68
AVProgram ** programs
Definition: avformat.h:1538
static av_cold void cleanup(FlashSV2Context *s)
Definition: flashsv2enc.c:127
int64_t av_compare_mod(uint64_t a, uint64_t b, uint64_t mod)
Compare the remainders of two integer operands divided by a common divisor.
Definition: mathematics.c:160
static int select_cur_seq_no(HLSContext *c, struct playlist *pls)
Definition: hls.c:1611
static uint8_t tmp[11]
Definition: aes_ctr.c:26