FFmpeg  4.1.11
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;
212 } HLSContext;
213 
214 static void free_segment_dynarray(struct segment **segments, int n_segments)
215 {
216  int i;
217  for (i = 0; i < n_segments; i++) {
218  av_freep(&segments[i]->key);
219  av_freep(&segments[i]->url);
220  av_freep(&segments[i]);
221  }
222 }
223 
224 static void free_segment_list(struct playlist *pls)
225 {
227  av_freep(&pls->segments);
228  pls->n_segments = 0;
229 }
230 
231 static void free_init_section_list(struct playlist *pls)
232 {
233  int i;
234  for (i = 0; i < pls->n_init_sections; i++) {
235  av_freep(&pls->init_sections[i]->key);
236  av_freep(&pls->init_sections[i]->url);
237  av_freep(&pls->init_sections[i]);
238  }
239  av_freep(&pls->init_sections);
240  pls->n_init_sections = 0;
241 }
242 
244 {
245  int i;
246  for (i = 0; i < c->n_playlists; i++) {
247  struct playlist *pls = c->playlists[i];
248  free_segment_list(pls);
250  av_freep(&pls->main_streams);
251  av_freep(&pls->renditions);
252  av_freep(&pls->id3_buf);
253  av_dict_free(&pls->id3_initial);
255  av_freep(&pls->init_sec_buf);
256  av_packet_unref(&pls->pkt);
257  av_freep(&pls->pb.buffer);
258  if (pls->input)
259  ff_format_io_close(c->ctx, &pls->input);
260  pls->input_read_done = 0;
261  if (pls->input_next)
262  ff_format_io_close(c->ctx, &pls->input_next);
263  pls->input_next_requested = 0;
264  if (pls->ctx) {
265  pls->ctx->pb = NULL;
266  avformat_close_input(&pls->ctx);
267  }
268  av_free(pls);
269  }
270  av_freep(&c->playlists);
271  c->n_playlists = 0;
272 }
273 
275 {
276  int i;
277  for (i = 0; i < c->n_variants; i++) {
278  struct variant *var = c->variants[i];
279  av_freep(&var->playlists);
280  av_free(var);
281  }
282  av_freep(&c->variants);
283  c->n_variants = 0;
284 }
285 
287 {
288  int i;
289  for (i = 0; i < c->n_renditions; i++)
290  av_freep(&c->renditions[i]);
291  av_freep(&c->renditions);
292  c->n_renditions = 0;
293 }
294 
295 /*
296  * Used to reset a statically allocated AVPacket to a clean slate,
297  * containing no data.
298  */
299 static void reset_packet(AVPacket *pkt)
300 {
301  av_init_packet(pkt);
302  pkt->data = NULL;
303 }
304 
305 static struct playlist *new_playlist(HLSContext *c, const char *url,
306  const char *base)
307 {
308  struct playlist *pls = av_mallocz(sizeof(struct playlist));
309  if (!pls)
310  return NULL;
311  reset_packet(&pls->pkt);
312  ff_make_absolute_url(pls->url, sizeof(pls->url), base, url);
314 
315  pls->is_id3_timestamped = -1;
317 
318  dynarray_add(&c->playlists, &c->n_playlists, pls);
319  return pls;
320 }
321 
322 struct variant_info {
323  char bandwidth[20];
324  /* variant group ids: */
325  char audio[MAX_FIELD_LEN];
326  char video[MAX_FIELD_LEN];
327  char subtitles[MAX_FIELD_LEN];
328 };
329 
330 static struct variant *new_variant(HLSContext *c, struct variant_info *info,
331  const char *url, const char *base)
332 {
333  struct variant *var;
334  struct playlist *pls;
335 
336  pls = new_playlist(c, url, base);
337  if (!pls)
338  return NULL;
339 
340  var = av_mallocz(sizeof(struct variant));
341  if (!var)
342  return NULL;
343 
344  if (info) {
345  var->bandwidth = atoi(info->bandwidth);
346  strcpy(var->audio_group, info->audio);
347  strcpy(var->video_group, info->video);
348  strcpy(var->subtitles_group, info->subtitles);
349  }
350 
351  dynarray_add(&c->variants, &c->n_variants, var);
352  dynarray_add(&var->playlists, &var->n_playlists, pls);
353  return var;
354 }
355 
356 static void handle_variant_args(struct variant_info *info, const char *key,
357  int key_len, char **dest, int *dest_len)
358 {
359  if (!strncmp(key, "BANDWIDTH=", key_len)) {
360  *dest = info->bandwidth;
361  *dest_len = sizeof(info->bandwidth);
362  } else if (!strncmp(key, "AUDIO=", key_len)) {
363  *dest = info->audio;
364  *dest_len = sizeof(info->audio);
365  } else if (!strncmp(key, "VIDEO=", key_len)) {
366  *dest = info->video;
367  *dest_len = sizeof(info->video);
368  } else if (!strncmp(key, "SUBTITLES=", key_len)) {
369  *dest = info->subtitles;
370  *dest_len = sizeof(info->subtitles);
371  }
372 }
373 
374 struct key_info {
375  char uri[MAX_URL_SIZE];
376  char method[11];
377  char iv[35];
378 };
379 
380 static void handle_key_args(struct key_info *info, const char *key,
381  int key_len, char **dest, int *dest_len)
382 {
383  if (!strncmp(key, "METHOD=", key_len)) {
384  *dest = info->method;
385  *dest_len = sizeof(info->method);
386  } else if (!strncmp(key, "URI=", key_len)) {
387  *dest = info->uri;
388  *dest_len = sizeof(info->uri);
389  } else if (!strncmp(key, "IV=", key_len)) {
390  *dest = info->iv;
391  *dest_len = sizeof(info->iv);
392  }
393 }
394 
396  char uri[MAX_URL_SIZE];
397  char byterange[32];
398 };
399 
400 static struct segment *new_init_section(struct playlist *pls,
401  struct init_section_info *info,
402  const char *url_base)
403 {
404  struct segment *sec;
405  char *ptr;
406  char tmp_str[MAX_URL_SIZE];
407 
408  if (!info->uri[0])
409  return NULL;
410 
411  sec = av_mallocz(sizeof(*sec));
412  if (!sec)
413  return NULL;
414 
415  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url_base, info->uri);
416  sec->url = av_strdup(tmp_str);
417  if (!sec->url) {
418  av_free(sec);
419  return NULL;
420  }
421 
422  if (info->byterange[0]) {
423  sec->size = strtoll(info->byterange, NULL, 10);
424  ptr = strchr(info->byterange, '@');
425  if (ptr)
426  sec->url_offset = strtoll(ptr+1, NULL, 10);
427  } else {
428  /* the entire file is the init section */
429  sec->size = -1;
430  }
431 
432  dynarray_add(&pls->init_sections, &pls->n_init_sections, sec);
433 
434  return sec;
435 }
436 
437 static void handle_init_section_args(struct init_section_info *info, const char *key,
438  int key_len, char **dest, int *dest_len)
439 {
440  if (!strncmp(key, "URI=", key_len)) {
441  *dest = info->uri;
442  *dest_len = sizeof(info->uri);
443  } else if (!strncmp(key, "BYTERANGE=", key_len)) {
444  *dest = info->byterange;
445  *dest_len = sizeof(info->byterange);
446  }
447 }
448 
450  char type[16];
451  char uri[MAX_URL_SIZE];
452  char group_id[MAX_FIELD_LEN];
453  char language[MAX_FIELD_LEN];
454  char assoc_language[MAX_FIELD_LEN];
456  char defaultr[4];
457  char forced[4];
458  char characteristics[MAX_CHARACTERISTICS_LEN];
459 };
460 
461 static struct rendition *new_rendition(HLSContext *c, struct rendition_info *info,
462  const char *url_base)
463 {
464  struct rendition *rend;
466  char *characteristic;
467  char *chr_ptr;
468  char *saveptr;
469 
470  if (!strcmp(info->type, "AUDIO"))
471  type = AVMEDIA_TYPE_AUDIO;
472  else if (!strcmp(info->type, "VIDEO"))
473  type = AVMEDIA_TYPE_VIDEO;
474  else if (!strcmp(info->type, "SUBTITLES"))
475  type = AVMEDIA_TYPE_SUBTITLE;
476  else if (!strcmp(info->type, "CLOSED-CAPTIONS"))
477  /* CLOSED-CAPTIONS is ignored since we do not support CEA-608 CC in
478  * AVC SEI RBSP anyway */
479  return NULL;
480 
481  if (type == AVMEDIA_TYPE_UNKNOWN)
482  return NULL;
483 
484  /* URI is mandatory for subtitles as per spec */
485  if (type == AVMEDIA_TYPE_SUBTITLE && !info->uri[0])
486  return NULL;
487 
488  /* TODO: handle subtitles (each segment has to parsed separately) */
490  if (type == AVMEDIA_TYPE_SUBTITLE)
491  return NULL;
492 
493  rend = av_mallocz(sizeof(struct rendition));
494  if (!rend)
495  return NULL;
496 
497  dynarray_add(&c->renditions, &c->n_renditions, rend);
498 
499  rend->type = type;
500  strcpy(rend->group_id, info->group_id);
501  strcpy(rend->language, info->language);
502  strcpy(rend->name, info->name);
503 
504  /* add the playlist if this is an external rendition */
505  if (info->uri[0]) {
506  rend->playlist = new_playlist(c, info->uri, url_base);
507  if (rend->playlist)
509  &rend->playlist->n_renditions, rend);
510  }
511 
512  if (info->assoc_language[0]) {
513  int langlen = strlen(rend->language);
514  if (langlen < sizeof(rend->language) - 3) {
515  rend->language[langlen] = ',';
516  strncpy(rend->language + langlen + 1, info->assoc_language,
517  sizeof(rend->language) - langlen - 2);
518  }
519  }
520 
521  if (!strcmp(info->defaultr, "YES"))
523  if (!strcmp(info->forced, "YES"))
525 
526  chr_ptr = info->characteristics;
527  while ((characteristic = av_strtok(chr_ptr, ",", &saveptr))) {
528  if (!strcmp(characteristic, "public.accessibility.describes-music-and-sound"))
530  else if (!strcmp(characteristic, "public.accessibility.describes-video"))
532 
533  chr_ptr = NULL;
534  }
535 
536  return rend;
537 }
538 
539 static void handle_rendition_args(struct rendition_info *info, const char *key,
540  int key_len, char **dest, int *dest_len)
541 {
542  if (!strncmp(key, "TYPE=", key_len)) {
543  *dest = info->type;
544  *dest_len = sizeof(info->type);
545  } else if (!strncmp(key, "URI=", key_len)) {
546  *dest = info->uri;
547  *dest_len = sizeof(info->uri);
548  } else if (!strncmp(key, "GROUP-ID=", key_len)) {
549  *dest = info->group_id;
550  *dest_len = sizeof(info->group_id);
551  } else if (!strncmp(key, "LANGUAGE=", key_len)) {
552  *dest = info->language;
553  *dest_len = sizeof(info->language);
554  } else if (!strncmp(key, "ASSOC-LANGUAGE=", key_len)) {
555  *dest = info->assoc_language;
556  *dest_len = sizeof(info->assoc_language);
557  } else if (!strncmp(key, "NAME=", key_len)) {
558  *dest = info->name;
559  *dest_len = sizeof(info->name);
560  } else if (!strncmp(key, "DEFAULT=", key_len)) {
561  *dest = info->defaultr;
562  *dest_len = sizeof(info->defaultr);
563  } else if (!strncmp(key, "FORCED=", key_len)) {
564  *dest = info->forced;
565  *dest_len = sizeof(info->forced);
566  } else if (!strncmp(key, "CHARACTERISTICS=", key_len)) {
567  *dest = info->characteristics;
568  *dest_len = sizeof(info->characteristics);
569  }
570  /*
571  * ignored:
572  * - AUTOSELECT: client may autoselect based on e.g. system language
573  * - INSTREAM-ID: EIA-608 closed caption number ("CC1".."CC4")
574  */
575 }
576 
577 /* used by parse_playlist to allocate a new variant+playlist when the
578  * playlist is detected to be a Media Playlist (not Master Playlist)
579  * and we have no parent Master Playlist (parsing of which would have
580  * allocated the variant and playlist already)
581  * *pls == NULL => Master Playlist or parentless Media Playlist
582  * *pls != NULL => parented Media Playlist, playlist+variant allocated */
583 static int ensure_playlist(HLSContext *c, struct playlist **pls, const char *url)
584 {
585  if (*pls)
586  return 0;
587  if (!new_variant(c, NULL, url, NULL))
588  return AVERROR(ENOMEM);
589  *pls = c->playlists[c->n_playlists - 1];
590  return 0;
591 }
592 
594  const char *url)
595 {
596 #if !CONFIG_HTTP_PROTOCOL
598 #else
599  int ret;
600  URLContext *uc = ffio_geturlcontext(*pb);
601  av_assert0(uc);
602  (*pb)->eof_reached = 0;
603  ret = ff_http_do_new_request(uc, url);
604  if (ret < 0) {
605  ff_format_io_close(s, pb);
606  }
607  return ret;
608 #endif
609 }
610 
611 static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url,
612  AVDictionary *opts, AVDictionary *opts2, int *is_http_out)
613 {
614  HLSContext *c = s->priv_data;
615  AVDictionary *tmp = NULL;
616  const char *proto_name = NULL;
617  int ret;
618  int is_http = 0;
619 
620  av_dict_copy(&tmp, opts, 0);
621  av_dict_copy(&tmp, opts2, 0);
622 
623  if (av_strstart(url, "crypto", NULL)) {
624  if (url[6] == '+' || url[6] == ':')
625  proto_name = avio_find_protocol_name(url + 7);
626  }
627 
628  if (!proto_name)
629  proto_name = avio_find_protocol_name(url);
630 
631  if (!proto_name)
632  return AVERROR_INVALIDDATA;
633 
634  // only http(s) & file are allowed
635  if (av_strstart(proto_name, "file", NULL)) {
636  if (strcmp(c->allowed_extensions, "ALL") && !av_match_ext(url, c->allowed_extensions)) {
637  av_log(s, AV_LOG_ERROR,
638  "Filename extension of \'%s\' is not a common multimedia extension, blocked for security reasons.\n"
639  "If you wish to override this adjust allowed_extensions, you can set it to \'ALL\' to allow all\n",
640  url);
641  return AVERROR_INVALIDDATA;
642  }
643  } else if (av_strstart(proto_name, "http", NULL)) {
644  is_http = 1;
645  } else
646  return AVERROR_INVALIDDATA;
647 
648  if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':')
649  ;
650  else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':')
651  ;
652  else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))
653  return AVERROR_INVALIDDATA;
654 
655  if (is_http && c->http_persistent && *pb) {
656  ret = open_url_keepalive(c->ctx, pb, url);
657  if (ret == AVERROR_EXIT) {
658  return ret;
659  } else if (ret < 0) {
660  if (ret != AVERROR_EOF)
662  "keepalive request failed for '%s', retrying with new connection: %s\n",
663  url, av_err2str(ret));
664  ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
665  }
666  } else {
667  ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
668  }
669  if (ret >= 0) {
670  // update cookies on http response with setcookies.
671  char *new_cookies = NULL;
672 
673  if (!(s->flags & AVFMT_FLAG_CUSTOM_IO))
674  av_opt_get(*pb, "cookies", AV_OPT_SEARCH_CHILDREN, (uint8_t**)&new_cookies);
675 
676  if (new_cookies)
677  av_dict_set(&opts, "cookies", new_cookies, AV_DICT_DONT_STRDUP_VAL);
678  }
679 
680  av_dict_free(&tmp);
681 
682  if (is_http_out)
683  *is_http_out = is_http;
684 
685  return ret;
686 }
687 
688 static int parse_playlist(HLSContext *c, const char *url,
689  struct playlist *pls, AVIOContext *in)
690 {
691  int ret = 0, is_segment = 0, is_variant = 0;
692  int64_t duration = 0;
693  enum KeyType key_type = KEY_NONE;
694  uint8_t iv[16] = "";
695  int has_iv = 0;
696  char key[MAX_URL_SIZE] = "";
697  char line[MAX_URL_SIZE];
698  const char *ptr;
699  int close_in = 0;
700  int64_t seg_offset = 0;
701  int64_t seg_size = -1;
702  uint8_t *new_url = NULL;
703  struct variant_info variant_info;
704  char tmp_str[MAX_URL_SIZE];
705  struct segment *cur_init_section = NULL;
706  int is_http = av_strstart(url, "http", NULL);
707  struct segment **prev_segments = NULL;
708  int prev_n_segments = 0;
709  int prev_start_seq_no = -1;
710 
711  if (is_http && !in && c->http_persistent && c->playlist_pb) {
712  in = c->playlist_pb;
713  ret = open_url_keepalive(c->ctx, &c->playlist_pb, url);
714  if (ret == AVERROR_EXIT) {
715  return ret;
716  } else if (ret < 0) {
717  if (ret != AVERROR_EOF)
719  "keepalive request failed for '%s', retrying with new connection: %s\n",
720  url, av_err2str(ret));
721  in = NULL;
722  }
723  }
724 
725  if (!in) {
727  av_dict_copy(&opts, c->avio_opts, 0);
728 
729  if (c->http_persistent)
730  av_dict_set(&opts, "multiple_requests", "1", 0);
731 
732  ret = c->ctx->io_open(c->ctx, &in, url, AVIO_FLAG_READ, &opts);
733  av_dict_free(&opts);
734  if (ret < 0)
735  return ret;
736 
737  if (is_http && c->http_persistent)
738  c->playlist_pb = in;
739  else
740  close_in = 1;
741  }
742 
743  if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >= 0)
744  url = new_url;
745 
746  ff_get_chomp_line(in, line, sizeof(line));
747  if (strcmp(line, "#EXTM3U")) {
748  ret = AVERROR_INVALIDDATA;
749  goto fail;
750  }
751 
752  if (pls) {
753  prev_start_seq_no = pls->start_seq_no;
754  prev_segments = pls->segments;
755  prev_n_segments = pls->n_segments;
756  pls->segments = NULL;
757  pls->n_segments = 0;
758 
759  pls->finished = 0;
760  pls->type = PLS_TYPE_UNSPECIFIED;
761  }
762  while (!avio_feof(in)) {
763  ff_get_chomp_line(in, line, sizeof(line));
764  if (av_strstart(line, "#EXT-X-STREAM-INF:", &ptr)) {
765  is_variant = 1;
766  memset(&variant_info, 0, sizeof(variant_info));
768  &variant_info);
769  } else if (av_strstart(line, "#EXT-X-KEY:", &ptr)) {
770  struct key_info info = {{0}};
772  &info);
773  key_type = KEY_NONE;
774  has_iv = 0;
775  if (!strcmp(info.method, "AES-128"))
776  key_type = KEY_AES_128;
777  if (!strcmp(info.method, "SAMPLE-AES"))
778  key_type = KEY_SAMPLE_AES;
779  if (!strncmp(info.iv, "0x", 2) || !strncmp(info.iv, "0X", 2)) {
780  ff_hex_to_data(iv, info.iv + 2);
781  has_iv = 1;
782  }
783  av_strlcpy(key, info.uri, sizeof(key));
784  } else if (av_strstart(line, "#EXT-X-MEDIA:", &ptr)) {
785  struct rendition_info info = {{0}};
787  &info);
788  new_rendition(c, &info, url);
789  } else if (av_strstart(line, "#EXT-X-TARGETDURATION:", &ptr)) {
790  int64_t t;
791  ret = ensure_playlist(c, &pls, url);
792  if (ret < 0)
793  goto fail;
794  t = strtoll(ptr, NULL, 10);
795  if (t < 0 || t >= INT64_MAX / AV_TIME_BASE) {
796  ret = AVERROR_INVALIDDATA;
797  goto fail;
798  }
799  pls->target_duration = t * AV_TIME_BASE;
800  } else if (av_strstart(line, "#EXT-X-MEDIA-SEQUENCE:", &ptr)) {
801  ret = ensure_playlist(c, &pls, url);
802  if (ret < 0)
803  goto fail;
804  pls->start_seq_no = atoi(ptr);
805  } else if (av_strstart(line, "#EXT-X-PLAYLIST-TYPE:", &ptr)) {
806  ret = ensure_playlist(c, &pls, url);
807  if (ret < 0)
808  goto fail;
809  if (!strcmp(ptr, "EVENT"))
810  pls->type = PLS_TYPE_EVENT;
811  else if (!strcmp(ptr, "VOD"))
812  pls->type = PLS_TYPE_VOD;
813  } else if (av_strstart(line, "#EXT-X-MAP:", &ptr)) {
814  struct init_section_info info = {{0}};
815  ret = ensure_playlist(c, &pls, url);
816  if (ret < 0)
817  goto fail;
819  &info);
820  cur_init_section = new_init_section(pls, &info, url);
821  cur_init_section->key_type = key_type;
822  if (has_iv) {
823  memcpy(cur_init_section->iv, iv, sizeof(iv));
824  } else {
825  int seq = pls->start_seq_no + pls->n_segments;
826  memset(cur_init_section->iv, 0, sizeof(cur_init_section->iv));
827  AV_WB32(cur_init_section->iv + 12, seq);
828  }
829 
830  if (key_type != KEY_NONE) {
831  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, key);
832  cur_init_section->key = av_strdup(tmp_str);
833  if (!cur_init_section->key) {
834  av_free(cur_init_section);
835  ret = AVERROR(ENOMEM);
836  goto fail;
837  }
838  } else {
839  cur_init_section->key = NULL;
840  }
841 
842  } else if (av_strstart(line, "#EXT-X-ENDLIST", &ptr)) {
843  if (pls)
844  pls->finished = 1;
845  } else if (av_strstart(line, "#EXTINF:", &ptr)) {
846  is_segment = 1;
847  duration = atof(ptr) * AV_TIME_BASE;
848  } else if (av_strstart(line, "#EXT-X-BYTERANGE:", &ptr)) {
849  seg_size = strtoll(ptr, NULL, 10);
850  ptr = strchr(ptr, '@');
851  if (ptr)
852  seg_offset = strtoll(ptr+1, NULL, 10);
853  } else if (av_strstart(line, "#", NULL)) {
854  continue;
855  } else if (line[0]) {
856  if (is_variant) {
857  if (!new_variant(c, &variant_info, line, url)) {
858  ret = AVERROR(ENOMEM);
859  goto fail;
860  }
861  is_variant = 0;
862  }
863  if (is_segment) {
864  struct segment *seg;
865  if (!pls) {
866  if (!new_variant(c, 0, url, NULL)) {
867  ret = AVERROR(ENOMEM);
868  goto fail;
869  }
870  pls = c->playlists[c->n_playlists - 1];
871  }
872  seg = av_malloc(sizeof(struct segment));
873  if (!seg) {
874  ret = AVERROR(ENOMEM);
875  goto fail;
876  }
877  if (has_iv) {
878  memcpy(seg->iv, iv, sizeof(iv));
879  } else {
880  int seq = pls->start_seq_no + pls->n_segments;
881  memset(seg->iv, 0, sizeof(seg->iv));
882  AV_WB32(seg->iv + 12, seq);
883  }
884 
885  if (key_type != KEY_NONE) {
886  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, key);
887  seg->key = av_strdup(tmp_str);
888  if (!seg->key) {
889  av_free(seg);
890  ret = AVERROR(ENOMEM);
891  goto fail;
892  }
893  } else {
894  seg->key = NULL;
895  }
896 
897  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, line);
898  seg->url = av_strdup(tmp_str);
899  if (!seg->url) {
900  av_free(seg->key);
901  av_free(seg);
902  ret = AVERROR(ENOMEM);
903  goto fail;
904  }
905 
906  if (duration < 0.001 * AV_TIME_BASE) {
907  av_log(c->ctx, AV_LOG_WARNING, "Cannot get correct #EXTINF value of segment %s,"
908  " set to default value to 1ms.\n", seg->url);
909  duration = 0.001 * AV_TIME_BASE;
910  }
911  seg->duration = duration;
912  seg->key_type = key_type;
913  dynarray_add(&pls->segments, &pls->n_segments, seg);
914  is_segment = 0;
915 
916  seg->size = seg_size;
917  if (seg_size >= 0) {
918  seg->url_offset = seg_offset;
919  seg_offset += seg_size;
920  seg_size = -1;
921  } else {
922  seg->url_offset = 0;
923  seg_offset = 0;
924  }
925 
926  seg->init_section = cur_init_section;
927  }
928  }
929  }
930  if (prev_segments) {
931  if (pls->start_seq_no > prev_start_seq_no && c->first_timestamp != AV_NOPTS_VALUE) {
932  int64_t prev_timestamp = c->first_timestamp;
933  int i, diff = pls->start_seq_no - prev_start_seq_no;
934  for (i = 0; i < prev_n_segments && i < diff; i++) {
935  c->first_timestamp += prev_segments[i]->duration;
936  }
937  av_log(c->ctx, AV_LOG_DEBUG, "Media sequence change (%d -> %d)"
938  " reflected in first_timestamp: %"PRId64" -> %"PRId64"\n",
939  prev_start_seq_no, pls->start_seq_no,
940  prev_timestamp, c->first_timestamp);
941  } else if (pls->start_seq_no < prev_start_seq_no) {
942  av_log(c->ctx, AV_LOG_WARNING, "Media sequence changed unexpectedly: %d -> %d\n",
943  prev_start_seq_no, pls->start_seq_no);
944  }
945  free_segment_dynarray(prev_segments, prev_n_segments);
946  }
947  if (pls)
949 
950 fail:
951  av_free(new_url);
952  if (close_in)
953  ff_format_io_close(c->ctx, &in);
954  c->ctx->ctx_flags = c->ctx->ctx_flags & ~(unsigned)AVFMTCTX_UNSEEKABLE;
955  if (!c->n_variants || !c->variants[0]->n_playlists ||
956  !(c->variants[0]->playlists[0]->finished ||
957  c->variants[0]->playlists[0]->type == PLS_TYPE_EVENT))
959  return ret;
960 }
961 
962 static struct segment *current_segment(struct playlist *pls)
963 {
964  return pls->segments[pls->cur_seq_no - pls->start_seq_no];
965 }
966 
967 static struct segment *next_segment(struct playlist *pls)
968 {
969  int n = pls->cur_seq_no - pls->start_seq_no + 1;
970  if (n >= pls->n_segments)
971  return NULL;
972  return pls->segments[n];
973 }
974 
975 static int read_from_url(struct playlist *pls, struct segment *seg,
976  uint8_t *buf, int buf_size)
977 {
978  int ret;
979 
980  /* limit read if the segment was only a part of a file */
981  if (seg->size >= 0)
982  buf_size = FFMIN(buf_size, seg->size - pls->cur_seg_offset);
983 
984  ret = avio_read(pls->input, buf, buf_size);
985  if (ret > 0)
986  pls->cur_seg_offset += ret;
987 
988  return ret;
989 }
990 
991 /* Parse the raw ID3 data and pass contents to caller */
993  AVDictionary **metadata, int64_t *dts,
994  ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta **extra_meta)
995 {
996  static const char id3_priv_owner_ts[] = "com.apple.streaming.transportStreamTimestamp";
997  ID3v2ExtraMeta *meta;
998 
999  ff_id3v2_read_dict(pb, metadata, ID3v2_DEFAULT_MAGIC, extra_meta);
1000  for (meta = *extra_meta; meta; meta = meta->next) {
1001  if (!strcmp(meta->tag, "PRIV")) {
1002  ID3v2ExtraMetaPRIV *priv = meta->data;
1003  if (priv->datasize == 8 && !strcmp(priv->owner, id3_priv_owner_ts)) {
1004  /* 33-bit MPEG timestamp */
1005  int64_t ts = AV_RB64(priv->data);
1006  av_log(s, AV_LOG_DEBUG, "HLS ID3 audio timestamp %"PRId64"\n", ts);
1007  if ((ts & ~((1ULL << 33) - 1)) == 0)
1008  *dts = ts;
1009  else
1010  av_log(s, AV_LOG_ERROR, "Invalid HLS ID3 audio timestamp %"PRId64"\n", ts);
1011  }
1012  } else if (!strcmp(meta->tag, "APIC") && apic)
1013  *apic = meta->data;
1014  }
1015 }
1016 
1017 /* Check if the ID3 metadata contents have changed */
1018 static int id3_has_changed_values(struct playlist *pls, AVDictionary *metadata,
1019  ID3v2ExtraMetaAPIC *apic)
1020 {
1021  AVDictionaryEntry *entry = NULL;
1022  AVDictionaryEntry *oldentry;
1023  /* check that no keys have changed values */
1024  while ((entry = av_dict_get(metadata, "", entry, AV_DICT_IGNORE_SUFFIX))) {
1025  oldentry = av_dict_get(pls->id3_initial, entry->key, NULL, AV_DICT_MATCH_CASE);
1026  if (!oldentry || strcmp(oldentry->value, entry->value) != 0)
1027  return 1;
1028  }
1029 
1030  /* check if apic appeared */
1031  if (apic && (pls->ctx->nb_streams != 2 || !pls->ctx->streams[1]->attached_pic.data))
1032  return 1;
1033 
1034  if (apic) {
1035  int size = pls->ctx->streams[1]->attached_pic.size;
1036  if (size != apic->buf->size - AV_INPUT_BUFFER_PADDING_SIZE)
1037  return 1;
1038 
1039  if (memcmp(apic->buf->data, pls->ctx->streams[1]->attached_pic.data, size) != 0)
1040  return 1;
1041  }
1042 
1043  return 0;
1044 }
1045 
1046 /* Parse ID3 data and handle the found data */
1047 static void handle_id3(AVIOContext *pb, struct playlist *pls)
1048 {
1049  AVDictionary *metadata = NULL;
1050  ID3v2ExtraMetaAPIC *apic = NULL;
1051  ID3v2ExtraMeta *extra_meta = NULL;
1052  int64_t timestamp = AV_NOPTS_VALUE;
1053 
1054  parse_id3(pls->ctx, pb, &metadata, &timestamp, &apic, &extra_meta);
1055 
1056  if (timestamp != AV_NOPTS_VALUE) {
1057  pls->id3_mpegts_timestamp = timestamp;
1058  pls->id3_offset = 0;
1059  }
1060 
1061  if (!pls->id3_found) {
1062  /* initial ID3 tags */
1064  pls->id3_found = 1;
1065 
1066  /* get picture attachment and set text metadata */
1067  if (pls->ctx->nb_streams)
1068  ff_id3v2_parse_apic(pls->ctx, &extra_meta);
1069  else
1070  /* demuxer not yet opened, defer picture attachment */
1071  pls->id3_deferred_extra = extra_meta;
1072 
1073  ff_id3v2_parse_priv_dict(&metadata, &extra_meta);
1074  av_dict_copy(&pls->ctx->metadata, metadata, 0);
1075  pls->id3_initial = metadata;
1076 
1077  } else {
1078  if (!pls->id3_changed && id3_has_changed_values(pls, metadata, apic)) {
1079  avpriv_report_missing_feature(pls->ctx, "Changing ID3 metadata in HLS audio elementary stream");
1080  pls->id3_changed = 1;
1081  }
1082  av_dict_free(&metadata);
1083  }
1084 
1085  if (!pls->id3_deferred_extra)
1086  ff_id3v2_free_extra_meta(&extra_meta);
1087 }
1088 
1089 static void intercept_id3(struct playlist *pls, uint8_t *buf,
1090  int buf_size, int *len)
1091 {
1092  /* intercept id3 tags, we do not want to pass them to the raw
1093  * demuxer on all segment switches */
1094  int bytes;
1095  int id3_buf_pos = 0;
1096  int fill_buf = 0;
1097  struct segment *seg = current_segment(pls);
1098 
1099  /* gather all the id3 tags */
1100  while (1) {
1101  /* see if we can retrieve enough data for ID3 header */
1102  if (*len < ID3v2_HEADER_SIZE && buf_size >= ID3v2_HEADER_SIZE) {
1103  bytes = read_from_url(pls, seg, buf + *len, ID3v2_HEADER_SIZE - *len);
1104  if (bytes > 0) {
1105 
1106  if (bytes == ID3v2_HEADER_SIZE - *len)
1107  /* no EOF yet, so fill the caller buffer again after
1108  * we have stripped the ID3 tags */
1109  fill_buf = 1;
1110 
1111  *len += bytes;
1112 
1113  } else if (*len <= 0) {
1114  /* error/EOF */
1115  *len = bytes;
1116  fill_buf = 0;
1117  }
1118  }
1119 
1120  if (*len < ID3v2_HEADER_SIZE)
1121  break;
1122 
1123  if (ff_id3v2_match(buf, ID3v2_DEFAULT_MAGIC)) {
1124  int64_t maxsize = seg->size >= 0 ? seg->size : 1024*1024;
1125  int taglen = ff_id3v2_tag_len(buf);
1126  int tag_got_bytes = FFMIN(taglen, *len);
1127  int remaining = taglen - tag_got_bytes;
1128 
1129  if (taglen > maxsize) {
1130  av_log(pls->ctx, AV_LOG_ERROR, "Too large HLS ID3 tag (%d > %"PRId64" bytes)\n",
1131  taglen, maxsize);
1132  break;
1133  }
1134 
1135  /*
1136  * Copy the id3 tag to our temporary id3 buffer.
1137  * We could read a small id3 tag directly without memcpy, but
1138  * we would still need to copy the large tags, and handling
1139  * both of those cases together with the possibility for multiple
1140  * tags would make the handling a bit complex.
1141  */
1142  pls->id3_buf = av_fast_realloc(pls->id3_buf, &pls->id3_buf_size, id3_buf_pos + taglen);
1143  if (!pls->id3_buf)
1144  break;
1145  memcpy(pls->id3_buf + id3_buf_pos, buf, tag_got_bytes);
1146  id3_buf_pos += tag_got_bytes;
1147 
1148  /* strip the intercepted bytes */
1149  *len -= tag_got_bytes;
1150  memmove(buf, buf + tag_got_bytes, *len);
1151  av_log(pls->ctx, AV_LOG_DEBUG, "Stripped %d HLS ID3 bytes\n", tag_got_bytes);
1152 
1153  if (remaining > 0) {
1154  /* read the rest of the tag in */
1155  if (read_from_url(pls, seg, pls->id3_buf + id3_buf_pos, remaining) != remaining)
1156  break;
1157  id3_buf_pos += remaining;
1158  av_log(pls->ctx, AV_LOG_DEBUG, "Stripped additional %d HLS ID3 bytes\n", remaining);
1159  }
1160 
1161  } else {
1162  /* no more ID3 tags */
1163  break;
1164  }
1165  }
1166 
1167  /* re-fill buffer for the caller unless EOF */
1168  if (*len >= 0 && (fill_buf || *len == 0)) {
1169  bytes = read_from_url(pls, seg, buf + *len, buf_size - *len);
1170 
1171  /* ignore error if we already had some data */
1172  if (bytes >= 0)
1173  *len += bytes;
1174  else if (*len == 0)
1175  *len = bytes;
1176  }
1177 
1178  if (pls->id3_buf) {
1179  /* Now parse all the ID3 tags */
1180  AVIOContext id3ioctx;
1181  ffio_init_context(&id3ioctx, pls->id3_buf, id3_buf_pos, 0, NULL, NULL, NULL, NULL);
1182  handle_id3(&id3ioctx, pls);
1183  }
1184 
1185  if (pls->is_id3_timestamped == -1)
1187 }
1188 
1189 static int open_input(HLSContext *c, struct playlist *pls, struct segment *seg, AVIOContext **in)
1190 {
1191  AVDictionary *opts = NULL;
1192  int ret;
1193  int is_http = 0;
1194 
1195  if (c->http_persistent)
1196  av_dict_set(&opts, "multiple_requests", "1", 0);
1197 
1198  if (seg->size >= 0) {
1199  /* try to restrict the HTTP request to the part we want
1200  * (if this is in fact a HTTP request) */
1201  av_dict_set_int(&opts, "offset", seg->url_offset, 0);
1202  av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
1203  }
1204 
1205  av_log(pls->parent, AV_LOG_VERBOSE, "HLS request for url '%s', offset %"PRId64", playlist %d\n",
1206  seg->url, seg->url_offset, pls->index);
1207 
1208  if (seg->key_type == KEY_NONE) {
1209  ret = open_url(pls->parent, in, seg->url, c->avio_opts, opts, &is_http);
1210  } else if (seg->key_type == KEY_AES_128) {
1211  char iv[33], key[33], url[MAX_URL_SIZE];
1212  if (strcmp(seg->key, pls->key_url)) {
1213  AVIOContext *pb = NULL;
1214  if (open_url(pls->parent, &pb, seg->key, c->avio_opts, opts, NULL) == 0) {
1215  ret = avio_read(pb, pls->key, sizeof(pls->key));
1216  if (ret != sizeof(pls->key)) {
1217  av_log(NULL, AV_LOG_ERROR, "Unable to read key file %s\n",
1218  seg->key);
1219  }
1220  ff_format_io_close(pls->parent, &pb);
1221  } else {
1222  av_log(NULL, AV_LOG_ERROR, "Unable to open key file %s\n",
1223  seg->key);
1224  }
1225  av_strlcpy(pls->key_url, seg->key, sizeof(pls->key_url));
1226  }
1227  ff_data_to_hex(iv, seg->iv, sizeof(seg->iv), 0);
1228  ff_data_to_hex(key, pls->key, sizeof(pls->key), 0);
1229  iv[32] = key[32] = '\0';
1230  if (strstr(seg->url, "://"))
1231  snprintf(url, sizeof(url), "crypto+%s", seg->url);
1232  else
1233  snprintf(url, sizeof(url), "crypto:%s", seg->url);
1234 
1235  av_dict_set(&opts, "key", key, 0);
1236  av_dict_set(&opts, "iv", iv, 0);
1237 
1238  ret = open_url(pls->parent, in, url, c->avio_opts, opts, &is_http);
1239  if (ret < 0) {
1240  goto cleanup;
1241  }
1242  ret = 0;
1243  } else if (seg->key_type == KEY_SAMPLE_AES) {
1244  av_log(pls->parent, AV_LOG_ERROR,
1245  "SAMPLE-AES encryption is not supported yet\n");
1246  ret = AVERROR_PATCHWELCOME;
1247  }
1248  else
1249  ret = AVERROR(ENOSYS);
1250 
1251  /* Seek to the requested position. If this was a HTTP request, the offset
1252  * should already be where want it to, but this allows e.g. local testing
1253  * without a HTTP server.
1254  *
1255  * This is not done for HTTP at all as avio_seek() does internal bookkeeping
1256  * of file offset which is out-of-sync with the actual offset when "offset"
1257  * AVOption is used with http protocol, causing the seek to not be a no-op
1258  * as would be expected. Wrong offset received from the server will not be
1259  * noticed without the call, though.
1260  */
1261  if (ret == 0 && !is_http && seg->key_type == KEY_NONE && seg->url_offset) {
1262  int64_t seekret = avio_seek(*in, seg->url_offset, SEEK_SET);
1263  if (seekret < 0) {
1264  av_log(pls->parent, AV_LOG_ERROR, "Unable to seek to offset %"PRId64" of HLS segment '%s'\n", seg->url_offset, seg->url);
1265  ret = seekret;
1266  ff_format_io_close(pls->parent, in);
1267  }
1268  }
1269 
1270 cleanup:
1271  av_dict_free(&opts);
1272  pls->cur_seg_offset = 0;
1273  return ret;
1274 }
1275 
1276 static int update_init_section(struct playlist *pls, struct segment *seg)
1277 {
1278  static const int max_init_section_size = 1024*1024;
1279  HLSContext *c = pls->parent->priv_data;
1280  int64_t sec_size;
1281  int64_t urlsize;
1282  int ret;
1283 
1284  if (seg->init_section == pls->cur_init_section)
1285  return 0;
1286 
1287  pls->cur_init_section = NULL;
1288 
1289  if (!seg->init_section)
1290  return 0;
1291 
1292  ret = open_input(c, pls, seg->init_section, &pls->input);
1293  if (ret < 0) {
1295  "Failed to open an initialization section in playlist %d\n",
1296  pls->index);
1297  return ret;
1298  }
1299 
1300  if (seg->init_section->size >= 0)
1301  sec_size = seg->init_section->size;
1302  else if ((urlsize = avio_size(pls->input)) >= 0)
1303  sec_size = urlsize;
1304  else
1305  sec_size = max_init_section_size;
1306 
1307  av_log(pls->parent, AV_LOG_DEBUG,
1308  "Downloading an initialization section of size %"PRId64"\n",
1309  sec_size);
1310 
1311  sec_size = FFMIN(sec_size, max_init_section_size);
1312 
1313  av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size);
1314 
1315  ret = read_from_url(pls, seg->init_section, pls->init_sec_buf,
1316  pls->init_sec_buf_size);
1317  ff_format_io_close(pls->parent, &pls->input);
1318 
1319  if (ret < 0)
1320  return ret;
1321 
1322  pls->cur_init_section = seg->init_section;
1323  pls->init_sec_data_len = ret;
1324  pls->init_sec_buf_read_offset = 0;
1325 
1326  /* spec says audio elementary streams do not have media initialization
1327  * sections, so there should be no ID3 timestamps */
1328  pls->is_id3_timestamped = 0;
1329 
1330  return 0;
1331 }
1332 
1333 static int64_t default_reload_interval(struct playlist *pls)
1334 {
1335  return pls->n_segments > 0 ?
1336  pls->segments[pls->n_segments - 1]->duration :
1337  pls->target_duration;
1338 }
1339 
1340 static int playlist_needed(struct playlist *pls)
1341 {
1342  AVFormatContext *s = pls->parent;
1343  int i, j;
1344  int stream_needed = 0;
1345  int first_st;
1346 
1347  /* If there is no context or streams yet, the playlist is needed */
1348  if (!pls->ctx || !pls->n_main_streams)
1349  return 1;
1350 
1351  /* check if any of the streams in the playlist are needed */
1352  for (i = 0; i < pls->n_main_streams; i++) {
1353  if (pls->main_streams[i]->discard < AVDISCARD_ALL) {
1354  stream_needed = 1;
1355  break;
1356  }
1357  }
1358 
1359  /* If all streams in the playlist were discarded, the playlist is not
1360  * needed (regardless of whether whole programs are discarded or not). */
1361  if (!stream_needed)
1362  return 0;
1363 
1364  /* Otherwise, check if all the programs (variants) this playlist is in are
1365  * discarded. Since all streams in the playlist are part of the same programs
1366  * we can just check the programs of the first stream. */
1367 
1368  first_st = pls->main_streams[0]->index;
1369 
1370  for (i = 0; i < s->nb_programs; i++) {
1371  AVProgram *program = s->programs[i];
1372  if (program->discard < AVDISCARD_ALL) {
1373  for (j = 0; j < program->nb_stream_indexes; j++) {
1374  if (program->stream_index[j] == first_st) {
1375  /* playlist is in an undiscarded program */
1376  return 1;
1377  }
1378  }
1379  }
1380  }
1381 
1382  /* some streams were not discarded but all the programs were */
1383  return 0;
1384 }
1385 
1386 static int read_data(void *opaque, uint8_t *buf, int buf_size)
1387 {
1388  struct playlist *v = opaque;
1389  HLSContext *c = v->parent->priv_data;
1390  int ret;
1391  int just_opened = 0;
1392  int reload_count = 0;
1393  struct segment *seg;
1394 
1395 restart:
1396  if (!v->needed)
1397  return AVERROR_EOF;
1398 
1399  if (!v->input || (c->http_persistent && v->input_read_done)) {
1400  int64_t reload_interval;
1401 
1402  /* Check that the playlist is still needed before opening a new
1403  * segment. */
1404  v->needed = playlist_needed(v);
1405 
1406  if (!v->needed) {
1407  av_log(v->parent, AV_LOG_INFO, "No longer receiving playlist %d\n",
1408  v->index);
1409  return AVERROR_EOF;
1410  }
1411 
1412  /* If this is a live stream and the reload interval has elapsed since
1413  * the last playlist reload, reload the playlists now. */
1414  reload_interval = default_reload_interval(v);
1415 
1416 reload:
1417  reload_count++;
1418  if (reload_count > c->max_reload)
1419  return AVERROR_EOF;
1420  if (!v->finished &&
1421  av_gettime_relative() - v->last_load_time >= reload_interval) {
1422  if ((ret = parse_playlist(c, v->url, v, NULL)) < 0) {
1423  if (ret != AVERROR_EXIT)
1424  av_log(v->parent, AV_LOG_WARNING, "Failed to reload playlist %d\n",
1425  v->index);
1426  return ret;
1427  }
1428  /* If we need to reload the playlist again below (if
1429  * there's still no more segments), switch to a reload
1430  * interval of half the target duration. */
1431  reload_interval = v->target_duration / 2;
1432  }
1433  if (v->cur_seq_no < v->start_seq_no) {
1435  "skipping %d segments ahead, expired from playlists\n",
1436  v->start_seq_no - v->cur_seq_no);
1437  v->cur_seq_no = v->start_seq_no;
1438  }
1439  if (v->cur_seq_no >= v->start_seq_no + v->n_segments) {
1440  if (v->finished)
1441  return AVERROR_EOF;
1442  while (av_gettime_relative() - v->last_load_time < reload_interval) {
1444  return AVERROR_EXIT;
1445  av_usleep(100*1000);
1446  }
1447  /* Enough time has elapsed since the last reload */
1448  goto reload;
1449  }
1450 
1451  v->input_read_done = 0;
1452  seg = current_segment(v);
1453 
1454  /* load/update Media Initialization Section, if any */
1455  ret = update_init_section(v, seg);
1456  if (ret)
1457  return ret;
1458 
1459  if (c->http_multiple == 1 && v->input_next_requested) {
1460  FFSWAP(AVIOContext *, v->input, v->input_next);
1461  v->input_next_requested = 0;
1462  ret = 0;
1463  } else {
1464  ret = open_input(c, v, seg, &v->input);
1465  }
1466  if (ret < 0) {
1468  return AVERROR_EXIT;
1469  av_log(v->parent, AV_LOG_WARNING, "Failed to open segment %d of playlist %d\n",
1470  v->cur_seq_no,
1471  v->index);
1472  v->cur_seq_no += 1;
1473  goto reload;
1474  }
1475  just_opened = 1;
1476  }
1477 
1478  if (c->http_multiple == -1) {
1479  uint8_t *http_version_opt = NULL;
1480  int r = av_opt_get(v->input, "http_version", AV_OPT_SEARCH_CHILDREN, &http_version_opt);
1481  if (r >= 0) {
1482  c->http_multiple = strncmp((const char *)http_version_opt, "1.1", 3) == 0;
1483  av_freep(&http_version_opt);
1484  }
1485  }
1486 
1487  seg = next_segment(v);
1488  if (c->http_multiple == 1 && !v->input_next_requested &&
1489  seg && seg->key_type == KEY_NONE && av_strstart(seg->url, "http", NULL)) {
1490  ret = open_input(c, v, seg, &v->input_next);
1491  if (ret < 0) {
1493  return AVERROR_EXIT;
1494  av_log(v->parent, AV_LOG_WARNING, "Failed to open segment %d of playlist %d\n",
1495  v->cur_seq_no + 1,
1496  v->index);
1497  } else {
1498  v->input_next_requested = 1;
1499  }
1500  }
1501 
1503  /* Push init section out first before first actual segment */
1504  int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size);
1505  memcpy(buf, v->init_sec_buf, copy_size);
1506  v->init_sec_buf_read_offset += copy_size;
1507  return copy_size;
1508  }
1509 
1510  seg = current_segment(v);
1511  ret = read_from_url(v, seg, buf, buf_size);
1512  if (ret > 0) {
1513  if (just_opened && v->is_id3_timestamped != 0) {
1514  /* Intercept ID3 tags here, elementary audio streams are required
1515  * to convey timestamps using them in the beginning of each segment. */
1516  intercept_id3(v, buf, buf_size, &ret);
1517  }
1518 
1519  return ret;
1520  }
1521  if (c->http_persistent &&
1522  seg->key_type == KEY_NONE && av_strstart(seg->url, "http", NULL)) {
1523  v->input_read_done = 1;
1524  } else {
1525  ff_format_io_close(v->parent, &v->input);
1526  }
1527  v->cur_seq_no++;
1528 
1529  c->cur_seq_no = v->cur_seq_no;
1530 
1531  goto restart;
1532 }
1533 
1534 static void add_renditions_to_variant(HLSContext *c, struct variant *var,
1535  enum AVMediaType type, const char *group_id)
1536 {
1537  int i;
1538 
1539  for (i = 0; i < c->n_renditions; i++) {
1540  struct rendition *rend = c->renditions[i];
1541 
1542  if (rend->type == type && !strcmp(rend->group_id, group_id)) {
1543 
1544  if (rend->playlist)
1545  /* rendition is an external playlist
1546  * => add the playlist to the variant */
1547  dynarray_add(&var->playlists, &var->n_playlists, rend->playlist);
1548  else
1549  /* rendition is part of the variant main Media Playlist
1550  * => add the rendition to the main Media Playlist */
1551  dynarray_add(&var->playlists[0]->renditions,
1552  &var->playlists[0]->n_renditions,
1553  rend);
1554  }
1555  }
1556 }
1557 
1559  enum AVMediaType type)
1560 {
1561  int rend_idx = 0;
1562  int i;
1563 
1564  for (i = 0; i < pls->n_main_streams; i++) {
1565  AVStream *st = pls->main_streams[i];
1566 
1567  if (st->codecpar->codec_type != type)
1568  continue;
1569 
1570  for (; rend_idx < pls->n_renditions; rend_idx++) {
1571  struct rendition *rend = pls->renditions[rend_idx];
1572 
1573  if (rend->type != type)
1574  continue;
1575 
1576  if (rend->language[0])
1577  av_dict_set(&st->metadata, "language", rend->language, 0);
1578  if (rend->name[0])
1579  av_dict_set(&st->metadata, "comment", rend->name, 0);
1580 
1581  st->disposition |= rend->disposition;
1582  }
1583  if (rend_idx >=pls->n_renditions)
1584  break;
1585  }
1586 }
1587 
1588 /* if timestamp was in valid range: returns 1 and sets seq_no
1589  * if not: returns 0 and sets seq_no to closest segment */
1591  int64_t timestamp, int *seq_no)
1592 {
1593  int i;
1594  int64_t pos = c->first_timestamp == AV_NOPTS_VALUE ?
1595  0 : c->first_timestamp;
1596 
1597  if (timestamp < pos) {
1598  *seq_no = pls->start_seq_no;
1599  return 0;
1600  }
1601 
1602  for (i = 0; i < pls->n_segments; i++) {
1603  int64_t diff = pos + pls->segments[i]->duration - timestamp;
1604  if (diff > 0) {
1605  *seq_no = pls->start_seq_no + i;
1606  return 1;
1607  }
1608  pos += pls->segments[i]->duration;
1609  }
1610 
1611  *seq_no = pls->start_seq_no + pls->n_segments - 1;
1612 
1613  return 0;
1614 }
1615 
1616 static int select_cur_seq_no(HLSContext *c, struct playlist *pls)
1617 {
1618  int seq_no;
1619 
1620  if (!pls->finished && !c->first_packet &&
1622  /* reload the playlist since it was suspended */
1623  parse_playlist(c, pls->url, pls, NULL);
1624 
1625  /* If playback is already in progress (we are just selecting a new
1626  * playlist) and this is a complete file, find the matching segment
1627  * by counting durations. */
1628  if (pls->finished && c->cur_timestamp != AV_NOPTS_VALUE) {
1629  find_timestamp_in_playlist(c, pls, c->cur_timestamp, &seq_no);
1630  return seq_no;
1631  }
1632 
1633  if (!pls->finished) {
1634  if (!c->first_packet && /* we are doing a segment selection during playback */
1635  c->cur_seq_no >= pls->start_seq_no &&
1636  c->cur_seq_no < pls->start_seq_no + pls->n_segments)
1637  /* While spec 3.4.3 says that we cannot assume anything about the
1638  * content at the same sequence number on different playlists,
1639  * in practice this seems to work and doing it otherwise would
1640  * require us to download a segment to inspect its timestamps. */
1641  return c->cur_seq_no;
1642 
1643  /* If this is a live stream, start live_start_index segments from the
1644  * start or end */
1645  if (c->live_start_index < 0)
1646  return pls->start_seq_no + FFMAX(pls->n_segments + c->live_start_index, 0);
1647  else
1648  return pls->start_seq_no + FFMIN(c->live_start_index, pls->n_segments - 1);
1649  }
1650 
1651  /* Otherwise just start on the first segment. */
1652  return pls->start_seq_no;
1653 }
1654 
1656 {
1657  HLSContext *c = s->priv_data;
1658  static const char * const opts[] = {
1659  "headers", "http_proxy", "user_agent", "cookies", "referer", "rw_timeout", NULL };
1660  const char * const * opt = opts;
1661  uint8_t *buf;
1662  int ret = 0;
1663 
1664  while (*opt) {
1665  if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN | AV_OPT_ALLOW_NULL, &buf) >= 0) {
1666  ret = av_dict_set(&c->avio_opts, *opt, buf,
1668  if (ret < 0)
1669  return ret;
1670  }
1671  opt++;
1672  }
1673 
1674  return ret;
1675 }
1676 
1677 static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url,
1678  int flags, AVDictionary **opts)
1679 {
1680  av_log(s, AV_LOG_ERROR,
1681  "A HLS playlist item '%s' referred to an external file '%s'. "
1682  "Opening this file was forbidden for security reasons\n",
1683  s->url, url);
1684  return AVERROR(EPERM);
1685 }
1686 
1687 static void add_stream_to_programs(AVFormatContext *s, struct playlist *pls, AVStream *stream)
1688 {
1689  HLSContext *c = s->priv_data;
1690  int i, j;
1691  int bandwidth = -1;
1692 
1693  for (i = 0; i < c->n_variants; i++) {
1694  struct variant *v = c->variants[i];
1695 
1696  for (j = 0; j < v->n_playlists; j++) {
1697  if (v->playlists[j] != pls)
1698  continue;
1699 
1700  av_program_add_stream_index(s, i, stream->index);
1701 
1702  if (bandwidth < 0)
1703  bandwidth = v->bandwidth;
1704  else if (bandwidth != v->bandwidth)
1705  bandwidth = -1; /* stream in multiple variants with different bandwidths */
1706  }
1707  }
1708 
1709  if (bandwidth >= 0)
1710  av_dict_set_int(&stream->metadata, "variant_bitrate", bandwidth, 0);
1711 }
1712 
1714 {
1715  int err;
1716 
1717  err = avcodec_parameters_copy(st->codecpar, ist->codecpar);
1718  if (err < 0)
1719  return err;
1720 
1721  if (pls->is_id3_timestamped) /* custom timestamps via id3 */
1722  avpriv_set_pts_info(st, 33, 1, MPEG_TIME_BASE);
1723  else
1725 
1726  st->internal->need_context_update = 1;
1727 
1728  return 0;
1729 }
1730 
1731 /* add new subdemuxer streams to our context, if any */
1733 {
1734  int err;
1735 
1736  while (pls->n_main_streams < pls->ctx->nb_streams) {
1737  int ist_idx = pls->n_main_streams;
1738  AVStream *st = avformat_new_stream(s, NULL);
1739  AVStream *ist = pls->ctx->streams[ist_idx];
1740 
1741  if (!st)
1742  return AVERROR(ENOMEM);
1743 
1744  st->id = pls->index;
1745  dynarray_add(&pls->main_streams, &pls->n_main_streams, st);
1746 
1747  add_stream_to_programs(s, pls, st);
1748 
1749  err = set_stream_info_from_input_stream(st, pls, ist);
1750  if (err < 0)
1751  return err;
1752  }
1753 
1754  return 0;
1755 }
1756 
1758 {
1759  HLSContext *c = s->priv_data;
1760  int flag_needed = 0;
1761  int i;
1762 
1763  for (i = 0; i < c->n_playlists; i++) {
1764  struct playlist *pls = c->playlists[i];
1765 
1766  if (pls->has_noheader_flag) {
1767  flag_needed = 1;
1768  break;
1769  }
1770  }
1771 
1772  if (flag_needed)
1774  else
1776 }
1777 
1779 {
1780  HLSContext *c = s->priv_data;
1781 
1782  free_playlist_list(c);
1783  free_variant_list(c);
1785 
1786  av_dict_free(&c->avio_opts);
1788 
1789  return 0;
1790 }
1791 
1793 {
1794  HLSContext *c = s->priv_data;
1795  int ret = 0, i;
1796  int highest_cur_seq_no = 0;
1797 
1798  c->ctx = s;
1801 
1802  c->first_packet = 1;
1805 
1806  if ((ret = save_avio_options(s)) < 0)
1807  goto fail;
1808 
1809  /* Some HLS servers don't like being sent the range header */
1810  av_dict_set(&c->avio_opts, "seekable", "0", 0);
1811 
1812  if ((ret = parse_playlist(c, s->url, NULL, s->pb)) < 0)
1813  goto fail;
1814 
1815  if (c->n_variants == 0) {
1816  av_log(NULL, AV_LOG_WARNING, "Empty playlist\n");
1817  ret = AVERROR_EOF;
1818  goto fail;
1819  }
1820  /* If the playlist only contained playlists (Master Playlist),
1821  * parse each individual playlist. */
1822  if (c->n_playlists > 1 || c->playlists[0]->n_segments == 0) {
1823  for (i = 0; i < c->n_playlists; i++) {
1824  struct playlist *pls = c->playlists[i];
1825  if ((ret = parse_playlist(c, pls->url, pls, NULL)) < 0)
1826  goto fail;
1827  }
1828  }
1829 
1830  if (c->variants[0]->playlists[0]->n_segments == 0) {
1831  av_log(NULL, AV_LOG_WARNING, "Empty playlist\n");
1832  ret = AVERROR_EOF;
1833  goto fail;
1834  }
1835 
1836  /* If this isn't a live stream, calculate the total duration of the
1837  * stream. */
1838  if (c->variants[0]->playlists[0]->finished) {
1839  int64_t duration = 0;
1840  for (i = 0; i < c->variants[0]->playlists[0]->n_segments; i++)
1841  duration += c->variants[0]->playlists[0]->segments[i]->duration;
1842  s->duration = duration;
1843  }
1844 
1845  /* Associate renditions with variants */
1846  for (i = 0; i < c->n_variants; i++) {
1847  struct variant *var = c->variants[i];
1848 
1849  if (var->audio_group[0])
1851  if (var->video_group[0])
1853  if (var->subtitles_group[0])
1855  }
1856 
1857  /* Create a program for each variant */
1858  for (i = 0; i < c->n_variants; i++) {
1859  struct variant *v = c->variants[i];
1860  AVProgram *program;
1861 
1862  program = av_new_program(s, i);
1863  if (!program)
1864  goto fail;
1865  av_dict_set_int(&program->metadata, "variant_bitrate", v->bandwidth, 0);
1866  }
1867 
1868  /* Select the starting segments */
1869  for (i = 0; i < c->n_playlists; i++) {
1870  struct playlist *pls = c->playlists[i];
1871 
1872  if (pls->n_segments == 0)
1873  continue;
1874 
1875  pls->cur_seq_no = select_cur_seq_no(c, pls);
1876  highest_cur_seq_no = FFMAX(highest_cur_seq_no, pls->cur_seq_no);
1877  }
1878 
1879  /* Open the demuxer for each playlist */
1880  for (i = 0; i < c->n_playlists; i++) {
1881  struct playlist *pls = c->playlists[i];
1882  AVInputFormat *in_fmt = NULL;
1883  char *url;
1884 
1885  if (!(pls->ctx = avformat_alloc_context())) {
1886  ret = AVERROR(ENOMEM);
1887  goto fail;
1888  }
1889 
1890  if (pls->n_segments == 0)
1891  continue;
1892 
1893  pls->index = i;
1894  pls->needed = 1;
1895  pls->parent = s;
1896 
1897  /*
1898  * If this is a live stream and this playlist looks like it is one segment
1899  * behind, try to sync it up so that every substream starts at the same
1900  * time position (so e.g. avformat_find_stream_info() will see packets from
1901  * all active streams within the first few seconds). This is not very generic,
1902  * though, as the sequence numbers are technically independent.
1903  */
1904  if (!pls->finished && pls->cur_seq_no == highest_cur_seq_no - 1 &&
1905  highest_cur_seq_no < pls->start_seq_no + pls->n_segments) {
1906  pls->cur_seq_no = highest_cur_seq_no;
1907  }
1908 
1910  if (!pls->read_buffer){
1911  ret = AVERROR(ENOMEM);
1912  avformat_free_context(pls->ctx);
1913  pls->ctx = NULL;
1914  goto fail;
1915  }
1916  ffio_init_context(&pls->pb, pls->read_buffer, INITIAL_BUFFER_SIZE, 0, pls,
1917  read_data, NULL, NULL);
1918  pls->pb.seekable = 0;
1919  url = av_strdup(pls->segments[0]->url);
1920  ret = av_probe_input_buffer(&pls->pb, &in_fmt, url, NULL, 0, 0);
1921  av_free(url);
1922  if (ret < 0) {
1923  /* Free the ctx - it isn't initialized properly at this point,
1924  * so avformat_close_input shouldn't be called. If
1925  * avformat_open_input fails below, it frees and zeros the
1926  * context, so it doesn't need any special treatment like this. */
1927  av_log(s, AV_LOG_ERROR, "Error when loading first segment '%s'\n", pls->segments[0]->url);
1928  avformat_free_context(pls->ctx);
1929  pls->ctx = NULL;
1930  goto fail;
1931  }
1932  pls->ctx->pb = &pls->pb;
1933  pls->ctx->io_open = nested_io_open;
1934  pls->ctx->flags |= s->flags & ~AVFMT_FLAG_CUSTOM_IO;
1935 
1936  if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
1937  goto fail;
1938 
1939  ret = avformat_open_input(&pls->ctx, pls->segments[0]->url, in_fmt, NULL);
1940  if (ret < 0)
1941  goto fail;
1942 
1943  if (pls->id3_deferred_extra && pls->ctx->nb_streams == 1) {
1948  pls->id3_deferred_extra = NULL;
1949  }
1950 
1951  if (pls->is_id3_timestamped == -1)
1952  av_log(s, AV_LOG_WARNING, "No expected HTTP requests have been made\n");
1953 
1954  /*
1955  * For ID3 timestamped raw audio streams we need to detect the packet
1956  * durations to calculate timestamps in fill_timing_for_id3_timestamped_stream(),
1957  * but for other streams we can rely on our user calling avformat_find_stream_info()
1958  * on us if they want to.
1959  */
1960  if (pls->is_id3_timestamped) {
1961  ret = avformat_find_stream_info(pls->ctx, NULL);
1962  if (ret < 0)
1963  goto fail;
1964  }
1965 
1966  pls->has_noheader_flag = !!(pls->ctx->ctx_flags & AVFMTCTX_NOHEADER);
1967 
1968  /* Create new AVStreams for each stream in this playlist */
1969  ret = update_streams_from_subdemuxer(s, pls);
1970  if (ret < 0)
1971  goto fail;
1972 
1973  /*
1974  * Copy any metadata from playlist to main streams, but do not set
1975  * event flags.
1976  */
1977  if (pls->n_main_streams)
1978  av_dict_copy(&pls->main_streams[0]->metadata, pls->ctx->metadata, 0);
1979 
1983  }
1984 
1986 
1987  return 0;
1988 fail:
1989  hls_close(s);
1990  return ret;
1991 }
1992 
1993 static int recheck_discard_flags(AVFormatContext *s, int first)
1994 {
1995  HLSContext *c = s->priv_data;
1996  int i, changed = 0;
1997  int cur_needed;
1998 
1999  /* Check if any new streams are needed */
2000  for (i = 0; i < c->n_playlists; i++) {
2001  struct playlist *pls = c->playlists[i];
2002 
2003  cur_needed = playlist_needed(c->playlists[i]);
2004 
2005  if (cur_needed && !pls->needed) {
2006  pls->needed = 1;
2007  changed = 1;
2008  pls->cur_seq_no = select_cur_seq_no(c, pls);
2009  pls->pb.eof_reached = 0;
2010  if (c->cur_timestamp != AV_NOPTS_VALUE) {
2011  /* catch up */
2012  pls->seek_timestamp = c->cur_timestamp;
2013  pls->seek_flags = AVSEEK_FLAG_ANY;
2014  pls->seek_stream_index = -1;
2015  }
2016  av_log(s, AV_LOG_INFO, "Now receiving playlist %d, segment %d\n", i, pls->cur_seq_no);
2017  } else if (first && !cur_needed && pls->needed) {
2018  if (pls->input)
2019  ff_format_io_close(pls->parent, &pls->input);
2020  pls->input_read_done = 0;
2021  if (pls->input_next)
2022  ff_format_io_close(pls->parent, &pls->input_next);
2023  pls->input_next_requested = 0;
2024  pls->needed = 0;
2025  changed = 1;
2026  av_log(s, AV_LOG_INFO, "No longer receiving playlist %d\n", i);
2027  }
2028  }
2029  return changed;
2030 }
2031 
2033 {
2034  if (pls->id3_offset >= 0) {
2035  pls->pkt.dts = pls->id3_mpegts_timestamp +
2036  av_rescale_q(pls->id3_offset,
2037  pls->ctx->streams[pls->pkt.stream_index]->time_base,
2039  if (pls->pkt.duration)
2040  pls->id3_offset += pls->pkt.duration;
2041  else
2042  pls->id3_offset = -1;
2043  } else {
2044  /* there have been packets with unknown duration
2045  * since the last id3 tag, should not normally happen */
2046  pls->pkt.dts = AV_NOPTS_VALUE;
2047  }
2048 
2049  if (pls->pkt.duration)
2050  pls->pkt.duration = av_rescale_q(pls->pkt.duration,
2051  pls->ctx->streams[pls->pkt.stream_index]->time_base,
2053 
2054  pls->pkt.pts = AV_NOPTS_VALUE;
2055 }
2056 
2057 static AVRational get_timebase(struct playlist *pls)
2058 {
2059  if (pls->is_id3_timestamped)
2060  return MPEG_TIME_BASE_Q;
2061 
2062  return pls->ctx->streams[pls->pkt.stream_index]->time_base;
2063 }
2064 
2065 static int compare_ts_with_wrapdetect(int64_t ts_a, struct playlist *pls_a,
2066  int64_t ts_b, struct playlist *pls_b)
2067 {
2068  int64_t scaled_ts_a = av_rescale_q(ts_a, get_timebase(pls_a), MPEG_TIME_BASE_Q);
2069  int64_t scaled_ts_b = av_rescale_q(ts_b, get_timebase(pls_b), MPEG_TIME_BASE_Q);
2070 
2071  return av_compare_mod(scaled_ts_a, scaled_ts_b, 1LL << 33);
2072 }
2073 
2075 {
2076  HLSContext *c = s->priv_data;
2077  int ret, i, minplaylist = -1;
2078 
2080  c->first_packet = 0;
2081 
2082  for (i = 0; i < c->n_playlists; i++) {
2083  struct playlist *pls = c->playlists[i];
2084  /* Make sure we've got one buffered packet from each open playlist
2085  * stream */
2086  if (pls->needed && !pls->pkt.data) {
2087  while (1) {
2088  int64_t ts_diff;
2089  AVRational tb;
2090  ret = av_read_frame(pls->ctx, &pls->pkt);
2091  if (ret < 0) {
2092  if (!avio_feof(&pls->pb) && ret != AVERROR_EOF)
2093  return ret;
2094  reset_packet(&pls->pkt);
2095  break;
2096  } else {
2097  /* stream_index check prevents matching picture attachments etc. */
2098  if (pls->is_id3_timestamped && pls->pkt.stream_index == 0) {
2099  /* audio elementary streams are id3 timestamped */
2101  }
2102 
2103  if (c->first_timestamp == AV_NOPTS_VALUE &&
2104  pls->pkt.dts != AV_NOPTS_VALUE)
2105  c->first_timestamp = av_rescale_q(pls->pkt.dts,
2107  }
2108 
2109  if (pls->seek_timestamp == AV_NOPTS_VALUE)
2110  break;
2111 
2112  if (pls->seek_stream_index < 0 ||
2113  pls->seek_stream_index == pls->pkt.stream_index) {
2114 
2115  if (pls->pkt.dts == AV_NOPTS_VALUE) {
2117  break;
2118  }
2119 
2120  tb = get_timebase(pls);
2121  ts_diff = av_rescale_rnd(pls->pkt.dts, AV_TIME_BASE,
2122  tb.den, AV_ROUND_DOWN) -
2123  pls->seek_timestamp;
2124  if (ts_diff >= 0 && (pls->seek_flags & AVSEEK_FLAG_ANY ||
2125  pls->pkt.flags & AV_PKT_FLAG_KEY)) {
2127  break;
2128  }
2129  }
2130  av_packet_unref(&pls->pkt);
2131  reset_packet(&pls->pkt);
2132  }
2133  }
2134  /* Check if this stream has the packet with the lowest dts */
2135  if (pls->pkt.data) {
2136  struct playlist *minpls = minplaylist < 0 ?
2137  NULL : c->playlists[minplaylist];
2138  if (minplaylist < 0) {
2139  minplaylist = i;
2140  } else {
2141  int64_t dts = pls->pkt.dts;
2142  int64_t mindts = minpls->pkt.dts;
2143 
2144  if (dts == AV_NOPTS_VALUE ||
2145  (mindts != AV_NOPTS_VALUE && compare_ts_with_wrapdetect(dts, pls, mindts, minpls) < 0))
2146  minplaylist = i;
2147  }
2148  }
2149  }
2150 
2151  /* If we got a packet, return it */
2152  if (minplaylist >= 0) {
2153  struct playlist *pls = c->playlists[minplaylist];
2154  AVStream *ist;
2155  AVStream *st;
2156 
2157  ret = update_streams_from_subdemuxer(s, pls);
2158  if (ret < 0) {
2159  av_packet_unref(&pls->pkt);
2160  reset_packet(&pls->pkt);
2161  return ret;
2162  }
2163 
2164  // If sub-demuxer reports updated metadata, copy it to the first stream
2165  // and set its AVSTREAM_EVENT_FLAG_METADATA_UPDATED flag.
2167  if (pls->n_main_streams) {
2168  st = pls->main_streams[0];
2169  av_dict_copy(&st->metadata, pls->ctx->metadata, 0);
2171  }
2173  }
2174 
2175  /* check if noheader flag has been cleared by the subdemuxer */
2176  if (pls->has_noheader_flag && !(pls->ctx->ctx_flags & AVFMTCTX_NOHEADER)) {
2177  pls->has_noheader_flag = 0;
2179  }
2180 
2181  if (pls->pkt.stream_index >= pls->n_main_streams) {
2182  av_log(s, AV_LOG_ERROR, "stream index inconsistency: index %d, %d main streams, %d subdemuxer streams\n",
2183  pls->pkt.stream_index, pls->n_main_streams, pls->ctx->nb_streams);
2184  av_packet_unref(&pls->pkt);
2185  reset_packet(&pls->pkt);
2186  return AVERROR_BUG;
2187  }
2188 
2189  ist = pls->ctx->streams[pls->pkt.stream_index];
2190  st = pls->main_streams[pls->pkt.stream_index];
2191 
2192  *pkt = pls->pkt;
2193  pkt->stream_index = st->index;
2194  reset_packet(&c->playlists[minplaylist]->pkt);
2195 
2196  if (pkt->dts != AV_NOPTS_VALUE)
2197  c->cur_timestamp = av_rescale_q(pkt->dts,
2198  ist->time_base,
2199  AV_TIME_BASE_Q);
2200 
2201  /* There may be more situations where this would be useful, but this at least
2202  * handles newly probed codecs properly (i.e. request_probe by mpegts). */
2203  if (ist->codecpar->codec_id != st->codecpar->codec_id) {
2204  ret = set_stream_info_from_input_stream(st, pls, ist);
2205  if (ret < 0) {
2206  av_packet_unref(pkt);
2207  return ret;
2208  }
2209  }
2210 
2211  return 0;
2212  }
2213  return AVERROR_EOF;
2214 }
2215 
2216 static int hls_read_seek(AVFormatContext *s, int stream_index,
2217  int64_t timestamp, int flags)
2218 {
2219  HLSContext *c = s->priv_data;
2220  struct playlist *seek_pls = NULL;
2221  int i, seq_no;
2222  int j;
2223  int stream_subdemuxer_index;
2224  int64_t first_timestamp, seek_timestamp, duration;
2225 
2226  if ((flags & AVSEEK_FLAG_BYTE) || (c->ctx->ctx_flags & AVFMTCTX_UNSEEKABLE))
2227  return AVERROR(ENOSYS);
2228 
2229  first_timestamp = c->first_timestamp == AV_NOPTS_VALUE ?
2230  0 : c->first_timestamp;
2231 
2232  seek_timestamp = av_rescale_rnd(timestamp, AV_TIME_BASE,
2233  s->streams[stream_index]->time_base.den,
2234  flags & AVSEEK_FLAG_BACKWARD ?
2236 
2237  duration = s->duration == AV_NOPTS_VALUE ?
2238  0 : s->duration;
2239 
2240  if (0 < duration && duration < seek_timestamp - first_timestamp)
2241  return AVERROR(EIO);
2242 
2243  /* find the playlist with the specified stream */
2244  for (i = 0; i < c->n_playlists; i++) {
2245  struct playlist *pls = c->playlists[i];
2246  for (j = 0; j < pls->n_main_streams; j++) {
2247  if (pls->main_streams[j] == s->streams[stream_index]) {
2248  seek_pls = pls;
2249  stream_subdemuxer_index = j;
2250  break;
2251  }
2252  }
2253  }
2254  /* check if the timestamp is valid for the playlist with the
2255  * specified stream index */
2256  if (!seek_pls || !find_timestamp_in_playlist(c, seek_pls, seek_timestamp, &seq_no))
2257  return AVERROR(EIO);
2258 
2259  /* set segment now so we do not need to search again below */
2260  seek_pls->cur_seq_no = seq_no;
2261  seek_pls->seek_stream_index = stream_subdemuxer_index;
2262 
2263  for (i = 0; i < c->n_playlists; i++) {
2264  /* Reset reading */
2265  struct playlist *pls = c->playlists[i];
2266  if (pls->input)
2267  ff_format_io_close(pls->parent, &pls->input);
2268  pls->input_read_done = 0;
2269  if (pls->input_next)
2270  ff_format_io_close(pls->parent, &pls->input_next);
2271  pls->input_next_requested = 0;
2272  av_packet_unref(&pls->pkt);
2273  reset_packet(&pls->pkt);
2274  pls->pb.eof_reached = 0;
2275  /* Clear any buffered data */
2276  pls->pb.buf_end = pls->pb.buf_ptr = pls->pb.buffer;
2277  /* Reset the pos, to let the mpegts demuxer know we've seeked. */
2278  pls->pb.pos = 0;
2279  /* Flush the packet queue of the subdemuxer. */
2280  ff_read_frame_flush(pls->ctx);
2281 
2283  pls->seek_flags = flags;
2284 
2285  if (pls != seek_pls) {
2286  /* set closest segment seq_no for playlists not handled above */
2287  find_timestamp_in_playlist(c, pls, seek_timestamp, &pls->cur_seq_no);
2288  /* seek the playlist to the given position without taking
2289  * keyframes into account since this playlist does not have the
2290  * specified stream where we should look for the keyframes */
2291  pls->seek_stream_index = -1;
2292  pls->seek_flags |= AVSEEK_FLAG_ANY;
2293  }
2294  }
2295 
2297 
2298  return 0;
2299 }
2300 
2301 static int hls_probe(AVProbeData *p)
2302 {
2303  /* Require #EXTM3U at the start, and either one of the ones below
2304  * somewhere for a proper match. */
2305  if (strncmp(p->buf, "#EXTM3U", 7))
2306  return 0;
2307 
2308  if (strstr(p->buf, "#EXT-X-STREAM-INF:") ||
2309  strstr(p->buf, "#EXT-X-TARGETDURATION:") ||
2310  strstr(p->buf, "#EXT-X-MEDIA-SEQUENCE:"))
2311  return AVPROBE_SCORE_MAX;
2312  return 0;
2313 }
2314 
2315 #define OFFSET(x) offsetof(HLSContext, x)
2316 #define FLAGS AV_OPT_FLAG_DECODING_PARAM
2317 static const AVOption hls_options[] = {
2318  {"live_start_index", "segment index to start live streams at (negative values are from the end)",
2319  OFFSET(live_start_index), AV_OPT_TYPE_INT, {.i64 = -3}, INT_MIN, INT_MAX, FLAGS},
2320  {"allowed_extensions", "List of file extensions that hls is allowed to access",
2321  OFFSET(allowed_extensions), AV_OPT_TYPE_STRING,
2322  {.str = "3gp,aac,avi,flac,mkv,m3u8,m4a,m4s,m4v,mpg,mov,mp2,mp3,mp4,mpeg,mpegts,ogg,ogv,oga,ts,vob,wav"},
2323  INT_MIN, INT_MAX, FLAGS},
2324  {"max_reload", "Maximum number of times a insufficient list is attempted to be reloaded",
2325  OFFSET(max_reload), AV_OPT_TYPE_INT, {.i64 = 1000}, 0, INT_MAX, FLAGS},
2326  {"http_persistent", "Use persistent HTTP connections",
2327  OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS },
2328  {"http_multiple", "Use multiple HTTP connections for fetching segments",
2329  OFFSET(http_multiple), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, FLAGS},
2330  {NULL}
2331 };
2332 
2333 static const AVClass hls_class = {
2334  .class_name = "hls,applehttp",
2335  .item_name = av_default_item_name,
2336  .option = hls_options,
2337  .version = LIBAVUTIL_VERSION_INT,
2338 };
2339 
2341  .name = "hls,applehttp",
2342  .long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
2343  .priv_class = &hls_class,
2344  .priv_data_size = sizeof(HLSContext),
2346  .read_probe = hls_probe,
2349  .read_close = hls_close,
2351 };
const char * name
Definition: avisynth_c.h:775
#define FF_COMPLIANCE_EXPERIMENTAL
Allow nonstandardized experimental things.
Definition: avcodec.h:2597
#define AVSEEK_FLAG_BACKWARD
Definition: avformat.h:2504
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:1933
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:1276
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:975
#define AVSTREAM_EVENT_FLAG_METADATA_UPDATED
The call resulted in updated metadata.
Definition: avformat.h:988
Definition: hls.c:93
char assoc_language[MAX_FIELD_LEN]
Definition: hls.c:454
int strict_std_compliance
Definition: hls.c:206
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1629
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:1713
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:437
#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:4899
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:2506
int event_flags
Flags for the user to detect events happening on the stream.
Definition: avformat.h:987
char forced[4]
Definition: hls.c:457
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:461
static int64_t default_reload_interval(struct playlist *pls)
Definition: hls.c:1333
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3900
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:875
int size
Definition: avcodec.h:1446
#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:453
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:1666
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:832
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:803
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:539
#define MAX_CHARACTERISTICS_LEN
Definition: hls.c:45
int ctx_flags
Flags signalling stream properties.
Definition: avformat.h:1400
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:1152
static void reset_packet(AVPacket *pkt)
Definition: hls.c:299
int strict_std_compliance
Allow non-standard and experimental extension.
Definition: avformat.h:1659
char * url
Definition: hls.c:72
int64_t url_offset
Definition: hls.c:70
static int id3_has_changed_values(struct playlist *pls, AVDictionary *metadata, ID3v2ExtraMetaAPIC *apic)
Definition: hls.c:1018
Format I/O context.
Definition: avformat.h:1351
#define MAX_URL_SIZE
Definition: internal.h:30
unsigned int nb_stream_indexes
Definition: avformat.h:1273
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:376
void ff_read_frame_flush(AVFormatContext *s)
Flush the frame reader.
Definition: utils.c:1927
#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:450
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:456
uint8_t
Round toward +infinity.
Definition: mathematics.h:83
int http_multiple
Definition: hls.c:210
int n_variants
Definition: hls.c:192
#define FLAGS
Definition: hls.c:2316
#define av_malloc(s)
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1295
AVOptions.
char group_id[MAX_FIELD_LEN]
Definition: hls.c:452
int64_t cur_seg_offset
Definition: hls.c:120
char audio[MAX_FIELD_LEN]
Definition: hls.c:325
static void free_rendition_list(HLSContext *c)
Definition: hls.c:286
#define AVFMTCTX_UNSEEKABLE
signal that the stream is definitely not seekable, and attempts to call the seek function will fail...
Definition: avformat.h:1298
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1463
static struct segment * next_segment(struct playlist *pls)
Definition: hls.c:967
int id
Format-specific stream ID.
Definition: avformat.h:881
uint8_t * read_buffer
Definition: hls.c:96
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5687
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:1089
static struct playlist * new_playlist(HLSContext *c, const char *url, const char *base)
Definition: hls.c:305
AVInputFormat ff_hls_demuxer
Definition: hls.c:2340
int ff_id3v2_parse_priv_dict(AVDictionary **metadata, ID3v2ExtraMeta **extra_meta)
Parse PRIV tags into a dictionary.
Definition: id3v2.c:1243
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4469
int finished
Definition: hls.c:112
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1419
static void handle_id3(AVIOContext *pb, struct playlist *pls)
Definition: hls.c:1047
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:1482
uint8_t * data
Definition: avcodec.h:1445
AVProgram * av_new_program(AVFormatContext *s, int id)
Definition: utils.c:4568
static int read_data(void *opaque, uint8_t *buf, int buf_size)
Definition: hls.c:1386
#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:593
enum AVDiscard discard
selects which program to discard and which to feed to the caller
Definition: avformat.h:1271
static void add_metadata_from_renditions(AVFormatContext *s, struct playlist *pls, enum AVMediaType type)
Definition: hls.c:1558
unsigned int * stream_index
Definition: avformat.h:1272
#define av_log(a,...)
static void free_playlist_list(HLSContext *c)
Definition: hls.c:243
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:1477
struct variant ** variants
Definition: hls.c:193
static void free_segment_dynarray(struct segment **segments, int n_segments)
Definition: hls.c:214
static AVRational get_timebase(struct playlist *pls)
Definition: hls.c:2057
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
int av_probe_input_buffer(AVIOContext *pb, 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
AVIOContext * playlist_pb
Definition: hls.c:211
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:258
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
Definition: utils.c:2086
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:2065
#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:1591
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:2333
AVIOInterruptCB * interrupt_callback
Definition: hls.c:204
char bandwidth[20]
Definition: hls.c:323
static void handle_key_args(struct key_info *info, const char *key, int key_len, char **dest, int *dest_len)
Definition: hls.c:380
#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:188
char * url
input or output URL.
Definition: avformat.h:1447
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:1530
char byterange[32]
Definition: hls.c:397
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:224
int ff_id3v2_parse_priv(AVFormatContext *s, ID3v2ExtraMeta **extra_meta)
Add metadata for all PRIV tags in the ID3v2 header.
Definition: id3v2.c:1283
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3896
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1136
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:1732
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:1590
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:1268
#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:117
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1451
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:450
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:831
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1407
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:962
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:1677
#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
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
char * allowed_extensions
Definition: hls.c:207
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:1534
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:2074
uint8_t * id3_buf
Definition: hls.c:138
#define AVFMT_EVENT_FLAG_METADATA_UPDATED
The call resulted in updated metadata.
Definition: avformat.h:1667
Definition: hls.c:374
#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:400
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:684
AVDictionary * metadata
Definition: avformat.h:938
static struct variant * new_variant(HLSContext *c, struct variant_info *info, const char *url, const char *base)
Definition: hls.c:330
#define AVFMT_FLAG_CUSTOM_IO
The caller has supplied a custom AVIOContext, don&#39;t avio_close() it.
Definition: avformat.h:1490
Usually treated as AVMEDIA_TYPE_DATA.
Definition: avutil.h:200
static void fill_timing_for_id3_timestamped_stream(struct playlist *pls)
Definition: hls.c:2032
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:455
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:548
#define AV_DISPOSITION_VISUAL_IMPAIRED
stream for visual impaired audiences
Definition: avformat.h:833
int64_t size
Definition: hls.c:71
enum KeyType key_type
Definition: hls.c:74
Stream structure.
Definition: avformat.h:874
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:482
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:992
#define AV_DISPOSITION_DEFAULT
Definition: avformat.h:819
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:327
AVStreamInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1231
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:667
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:1393
static int parse_playlist(HLSContext *c, const char *url, struct playlist *pls, AVIOContext *in)
Definition: hls.c:688
int n_init_sections
Definition: hls.c:158
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:598
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:611
#define AVFMT_NOGENSEARCH
Format does not allow to fall back on generic search.
Definition: avformat.h:476
static const AVOption hls_options[]
Definition: hls.c:2317
static int hls_read_header(AVFormatContext *s)
Definition: hls.c:1792
void * buf
Definition: avisynth_c.h:690
Definition: url.h:38
int max_reload
Definition: hls.c:208
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:1189
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:1757
#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:1655
#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:2505
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:451
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:1687
#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:4403
This structure contains the data a format has to probe a file.
Definition: avformat.h:448
int ff_hex_to_data(uint8_t *data, const char *p)
Parse a string of hexadecimal strings.
Definition: utils.c:4871
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1777
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:356
const char * avio_find_protocol_name(const char *url)
Return the name of the protocol that will handle the passed URL.
Definition: avio.c:476
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:1274
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:610
KeyType
Definition: hls.c:62
static int recheck_discard_flags(AVFormatContext *s, int first)
Definition: hls.c:1993
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:4929
int ff_http_do_new_request(URLContext *h, const char *uri)
Send a new HTTP request, reusing the old connection.
Definition: http.c:307
int64_t seek_timestamp
Definition: hls.c:145
char iv[35]
Definition: hls.c:377
#define OFFSET(x)
Definition: hls.c:2315
char characteristics[MAX_CHARACTERISTICS_LEN]
Definition: hls.c:458
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:460
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:375
#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:142
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:1340
int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
Read packets of a media file to get stream information.
Definition: utils.c:3578
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:927
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:1066
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:4441
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:782
int http_persistent
Definition: hls.c:209
static int hls_probe(AVProbeData *p)
Definition: hls.c:2301
static int ensure_playlist(HLSContext *c, struct playlist **pls, const char *url)
Definition: hls.c:583
static int hls_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: hls.c:2216
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:1124
char * value
Definition: dict.h:87
int eof_reached
true if eof reached
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:155
void * priv_data
Format private data.
Definition: avformat.h:1379
AVBufferRef * buf
Definition: id3v2.h:72
AVFormatContext * ctx
Definition: hls.c:103
uint32_t datasize
Definition: id3v2.h:81
int avformat_open_input(AVFormatContext **ps, const char *url, AVInputFormat *fmt, AVDictionary **options)
Open an input stream and read the header.
Definition: utils.c:540
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:1444
char video[MAX_FIELD_LEN]
Definition: hls.c:326
int64_t duration
Duration of the stream, in AV_TIME_BASE fractional seconds.
Definition: avformat.h:1466
#define av_freep(p)
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:647
#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:396
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1021
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
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:1447
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:903
static void free_init_section_list(struct playlist *pls)
Definition: hls.c:231
int64_t duration
Definition: hls.c:69
static void free_variant_list(HLSContext *c)
Definition: hls.c:274
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:929
char key_url[MAX_URL_SIZE]
Definition: hls.c:130
static int hls_close(AVFormatContext *s)
Definition: hls.c:1778
char * ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase)
Definition: utils.c:4850
This structure stores compressed data.
Definition: avcodec.h:1422
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:1438
AVPacket attached_pic
For streams with AV_DISPOSITION_ATTACHED_PIC disposition, this packet will contain the attached pictu...
Definition: avformat.h:956
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
#define tb
Definition: regdef.h:68
AVProgram ** programs
Definition: avformat.h:1531
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:1616
static uint8_t tmp[11]
Definition: aes_ctr.c:26