FFmpeg  4.3.7
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;
119  int broken;
123  int64_t cur_seg_offset;
124  int64_t last_load_time;
125 
126  /* Currently active Media Initialization Section */
129  unsigned int init_sec_buf_size;
130  unsigned int init_sec_data_len;
132 
133  char key_url[MAX_URL_SIZE];
135 
136  /* ID3 timestamp handling (elementary audio streams have ID3 timestamps
137  * (and possibly other ID3 tags) in the beginning of each segment) */
138  int is_id3_timestamped; /* -1: not yet known */
139  int64_t id3_mpegts_timestamp; /* in mpegts tb */
140  int64_t id3_offset; /* in stream original tb */
141  uint8_t* id3_buf; /* temp buffer for id3 parsing */
142  unsigned int id3_buf_size;
143  AVDictionary *id3_initial; /* data from first id3 tag */
144  int id3_found; /* ID3 tag found at some point */
145  int id3_changed; /* ID3 tag data has changed at some point */
146  ID3v2ExtraMeta *id3_deferred_extra; /* stored here until subdemuxer is opened */
147 
148  int64_t seek_timestamp;
150  int seek_stream_index; /* into subdemuxer stream array */
151 
152  /* Renditions associated with this playlist, if any.
153  * Alternative rendition playlists have a single rendition associated
154  * with them, and variant main Media Playlists may have
155  * multiple (playlist-less) renditions associated with them. */
158 
159  /* Media Initialization Sections (EXT-X-MAP) associated with this
160  * playlist, if any. */
163 };
164 
165 /*
166  * Renditions are e.g. alternative subtitle or audio streams.
167  * The rendition may either be an external playlist or it may be
168  * contained in the main Media Playlist of the variant (in which case
169  * playlist is NULL).
170  */
171 struct rendition {
174  char group_id[MAX_FIELD_LEN];
175  char language[MAX_FIELD_LEN];
178 };
179 
180 struct variant {
182 
183  /* every variant contains at least the main Media Playlist in index 0 */
185  struct playlist **playlists;
186 
187  char audio_group[MAX_FIELD_LEN];
188  char video_group[MAX_FIELD_LEN];
189  char subtitles_group[MAX_FIELD_LEN];
190 };
191 
192 typedef struct HLSContext {
193  AVClass *class;
196  struct variant **variants;
198  struct playlist **playlists;
201 
207  int64_t cur_timestamp;
216 } HLSContext;
217 
218 static void free_segment_dynarray(struct segment **segments, int n_segments)
219 {
220  int i;
221  for (i = 0; i < n_segments; i++) {
222  av_freep(&segments[i]->key);
223  av_freep(&segments[i]->url);
224  av_freep(&segments[i]);
225  }
226 }
227 
228 static void free_segment_list(struct playlist *pls)
229 {
231  av_freep(&pls->segments);
232  pls->n_segments = 0;
233 }
234 
235 static void free_init_section_list(struct playlist *pls)
236 {
237  int i;
238  for (i = 0; i < pls->n_init_sections; i++) {
239  av_freep(&pls->init_sections[i]->key);
240  av_freep(&pls->init_sections[i]->url);
241  av_freep(&pls->init_sections[i]);
242  }
243  av_freep(&pls->init_sections);
244  pls->n_init_sections = 0;
245 }
246 
248 {
249  int i;
250  for (i = 0; i < c->n_playlists; i++) {
251  struct playlist *pls = c->playlists[i];
252  free_segment_list(pls);
254  av_freep(&pls->main_streams);
255  av_freep(&pls->renditions);
256  av_freep(&pls->id3_buf);
257  av_dict_free(&pls->id3_initial);
259  av_freep(&pls->init_sec_buf);
260  av_packet_unref(&pls->pkt);
261  av_freep(&pls->pb.buffer);
262  ff_format_io_close(c->ctx, &pls->input);
263  pls->input_read_done = 0;
264  ff_format_io_close(c->ctx, &pls->input_next);
265  pls->input_next_requested = 0;
266  if (pls->ctx) {
267  pls->ctx->pb = NULL;
268  avformat_close_input(&pls->ctx);
269  }
270  av_free(pls);
271  }
272  av_freep(&c->playlists);
273  c->n_playlists = 0;
274 }
275 
277 {
278  int i;
279  for (i = 0; i < c->n_variants; i++) {
280  struct variant *var = c->variants[i];
281  av_freep(&var->playlists);
282  av_free(var);
283  }
284  av_freep(&c->variants);
285  c->n_variants = 0;
286 }
287 
289 {
290  int i;
291  for (i = 0; i < c->n_renditions; i++)
292  av_freep(&c->renditions[i]);
293  av_freep(&c->renditions);
294  c->n_renditions = 0;
295 }
296 
297 /*
298  * Used to reset a statically allocated AVPacket to a clean state,
299  * containing no data.
300  */
301 static void reset_packet(AVPacket *pkt)
302 {
303  av_init_packet(pkt);
304  pkt->data = NULL;
305 }
306 
307 static struct playlist *new_playlist(HLSContext *c, const char *url,
308  const char *base)
309 {
310  struct playlist *pls = av_mallocz(sizeof(struct playlist));
311  if (!pls)
312  return NULL;
313  reset_packet(&pls->pkt);
314  ff_make_absolute_url(pls->url, sizeof(pls->url), base, url);
315  if (!pls->url[0]) {
316  av_free(pls);
317  return NULL;
318  }
320 
321  pls->is_id3_timestamped = -1;
323 
324  dynarray_add(&c->playlists, &c->n_playlists, pls);
325  return pls;
326 }
327 
328 struct variant_info {
329  char bandwidth[20];
330  /* variant group ids: */
331  char audio[MAX_FIELD_LEN];
332  char video[MAX_FIELD_LEN];
333  char subtitles[MAX_FIELD_LEN];
334 };
335 
336 static struct variant *new_variant(HLSContext *c, struct variant_info *info,
337  const char *url, const char *base)
338 {
339  struct variant *var;
340  struct playlist *pls;
341 
342  pls = new_playlist(c, url, base);
343  if (!pls)
344  return NULL;
345 
346  var = av_mallocz(sizeof(struct variant));
347  if (!var)
348  return NULL;
349 
350  if (info) {
351  var->bandwidth = atoi(info->bandwidth);
352  strcpy(var->audio_group, info->audio);
353  strcpy(var->video_group, info->video);
354  strcpy(var->subtitles_group, info->subtitles);
355  }
356 
357  dynarray_add(&c->variants, &c->n_variants, var);
358  dynarray_add(&var->playlists, &var->n_playlists, pls);
359  return var;
360 }
361 
362 static void handle_variant_args(struct variant_info *info, const char *key,
363  int key_len, char **dest, int *dest_len)
364 {
365  if (!strncmp(key, "BANDWIDTH=", key_len)) {
366  *dest = info->bandwidth;
367  *dest_len = sizeof(info->bandwidth);
368  } else if (!strncmp(key, "AUDIO=", key_len)) {
369  *dest = info->audio;
370  *dest_len = sizeof(info->audio);
371  } else if (!strncmp(key, "VIDEO=", key_len)) {
372  *dest = info->video;
373  *dest_len = sizeof(info->video);
374  } else if (!strncmp(key, "SUBTITLES=", key_len)) {
375  *dest = info->subtitles;
376  *dest_len = sizeof(info->subtitles);
377  }
378 }
379 
380 struct key_info {
381  char uri[MAX_URL_SIZE];
382  char method[11];
383  char iv[35];
384 };
385 
386 static void handle_key_args(struct key_info *info, const char *key,
387  int key_len, char **dest, int *dest_len)
388 {
389  if (!strncmp(key, "METHOD=", key_len)) {
390  *dest = info->method;
391  *dest_len = sizeof(info->method);
392  } else if (!strncmp(key, "URI=", key_len)) {
393  *dest = info->uri;
394  *dest_len = sizeof(info->uri);
395  } else if (!strncmp(key, "IV=", key_len)) {
396  *dest = info->iv;
397  *dest_len = sizeof(info->iv);
398  }
399 }
400 
402  char uri[MAX_URL_SIZE];
403  char byterange[32];
404 };
405 
406 static struct segment *new_init_section(struct playlist *pls,
407  struct init_section_info *info,
408  const char *url_base)
409 {
410  struct segment *sec;
411  char tmp_str[MAX_URL_SIZE], *ptr = tmp_str;
412 
413  if (!info->uri[0])
414  return NULL;
415 
416  sec = av_mallocz(sizeof(*sec));
417  if (!sec)
418  return NULL;
419 
420  if (!av_strncasecmp(info->uri, "data:", 5)) {
421  ptr = info->uri;
422  } else {
423  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url_base, info->uri);
424  if (!tmp_str[0]) {
425  av_free(sec);
426  return NULL;
427  }
428  }
429  sec->url = av_strdup(ptr);
430  if (!sec->url) {
431  av_free(sec);
432  return NULL;
433  }
434 
435  if (info->byterange[0]) {
436  sec->size = strtoll(info->byterange, NULL, 10);
437  ptr = strchr(info->byterange, '@');
438  if (ptr)
439  sec->url_offset = strtoll(ptr+1, NULL, 10);
440  } else {
441  /* the entire file is the init section */
442  sec->size = -1;
443  }
444 
445  dynarray_add(&pls->init_sections, &pls->n_init_sections, sec);
446 
447  return sec;
448 }
449 
450 static void handle_init_section_args(struct init_section_info *info, const char *key,
451  int key_len, char **dest, int *dest_len)
452 {
453  if (!strncmp(key, "URI=", key_len)) {
454  *dest = info->uri;
455  *dest_len = sizeof(info->uri);
456  } else if (!strncmp(key, "BYTERANGE=", key_len)) {
457  *dest = info->byterange;
458  *dest_len = sizeof(info->byterange);
459  }
460 }
461 
463  char type[16];
464  char uri[MAX_URL_SIZE];
465  char group_id[MAX_FIELD_LEN];
466  char language[MAX_FIELD_LEN];
467  char assoc_language[MAX_FIELD_LEN];
469  char defaultr[4];
470  char forced[4];
471  char characteristics[MAX_CHARACTERISTICS_LEN];
472 };
473 
474 static struct rendition *new_rendition(HLSContext *c, struct rendition_info *info,
475  const char *url_base)
476 {
477  struct rendition *rend;
479  char *characteristic;
480  char *chr_ptr;
481  char *saveptr;
482 
483  if (!strcmp(info->type, "AUDIO"))
484  type = AVMEDIA_TYPE_AUDIO;
485  else if (!strcmp(info->type, "VIDEO"))
486  type = AVMEDIA_TYPE_VIDEO;
487  else if (!strcmp(info->type, "SUBTITLES"))
488  type = AVMEDIA_TYPE_SUBTITLE;
489  else if (!strcmp(info->type, "CLOSED-CAPTIONS"))
490  /* CLOSED-CAPTIONS is ignored since we do not support CEA-608 CC in
491  * AVC SEI RBSP anyway */
492  return NULL;
493 
494  if (type == AVMEDIA_TYPE_UNKNOWN) {
495  av_log(c->ctx, AV_LOG_WARNING, "Can't support the type: %s\n", info->type);
496  return NULL;
497  }
498 
499  /* URI is mandatory for subtitles as per spec */
500  if (type == AVMEDIA_TYPE_SUBTITLE && !info->uri[0]) {
501  av_log(c->ctx, AV_LOG_ERROR, "The URI tag is REQUIRED for subtitle.\n");
502  return NULL;
503  }
504 
505  /* TODO: handle subtitles (each segment has to parsed separately) */
507  if (type == AVMEDIA_TYPE_SUBTITLE) {
508  av_log(c->ctx, AV_LOG_WARNING, "Can't support the subtitle(uri: %s)\n", info->uri);
509  return NULL;
510  }
511 
512  rend = av_mallocz(sizeof(struct rendition));
513  if (!rend)
514  return NULL;
515 
516  dynarray_add(&c->renditions, &c->n_renditions, rend);
517 
518  rend->type = type;
519  strcpy(rend->group_id, info->group_id);
520  strcpy(rend->language, info->language);
521  strcpy(rend->name, info->name);
522 
523  /* add the playlist if this is an external rendition */
524  if (info->uri[0]) {
525  rend->playlist = new_playlist(c, info->uri, url_base);
526  if (rend->playlist)
528  &rend->playlist->n_renditions, rend);
529  }
530 
531  if (info->assoc_language[0]) {
532  int langlen = strlen(rend->language);
533  if (langlen < sizeof(rend->language) - 3) {
534  rend->language[langlen] = ',';
535  strncpy(rend->language + langlen + 1, info->assoc_language,
536  sizeof(rend->language) - langlen - 2);
537  }
538  }
539 
540  if (!strcmp(info->defaultr, "YES"))
542  if (!strcmp(info->forced, "YES"))
544 
545  chr_ptr = info->characteristics;
546  while ((characteristic = av_strtok(chr_ptr, ",", &saveptr))) {
547  if (!strcmp(characteristic, "public.accessibility.describes-music-and-sound"))
549  else if (!strcmp(characteristic, "public.accessibility.describes-video"))
551 
552  chr_ptr = NULL;
553  }
554 
555  return rend;
556 }
557 
558 static void handle_rendition_args(struct rendition_info *info, const char *key,
559  int key_len, char **dest, int *dest_len)
560 {
561  if (!strncmp(key, "TYPE=", key_len)) {
562  *dest = info->type;
563  *dest_len = sizeof(info->type);
564  } else if (!strncmp(key, "URI=", key_len)) {
565  *dest = info->uri;
566  *dest_len = sizeof(info->uri);
567  } else if (!strncmp(key, "GROUP-ID=", key_len)) {
568  *dest = info->group_id;
569  *dest_len = sizeof(info->group_id);
570  } else if (!strncmp(key, "LANGUAGE=", key_len)) {
571  *dest = info->language;
572  *dest_len = sizeof(info->language);
573  } else if (!strncmp(key, "ASSOC-LANGUAGE=", key_len)) {
574  *dest = info->assoc_language;
575  *dest_len = sizeof(info->assoc_language);
576  } else if (!strncmp(key, "NAME=", key_len)) {
577  *dest = info->name;
578  *dest_len = sizeof(info->name);
579  } else if (!strncmp(key, "DEFAULT=", key_len)) {
580  *dest = info->defaultr;
581  *dest_len = sizeof(info->defaultr);
582  } else if (!strncmp(key, "FORCED=", key_len)) {
583  *dest = info->forced;
584  *dest_len = sizeof(info->forced);
585  } else if (!strncmp(key, "CHARACTERISTICS=", key_len)) {
586  *dest = info->characteristics;
587  *dest_len = sizeof(info->characteristics);
588  }
589  /*
590  * ignored:
591  * - AUTOSELECT: client may autoselect based on e.g. system language
592  * - INSTREAM-ID: EIA-608 closed caption number ("CC1".."CC4")
593  */
594 }
595 
596 /* used by parse_playlist to allocate a new variant+playlist when the
597  * playlist is detected to be a Media Playlist (not Master Playlist)
598  * and we have no parent Master Playlist (parsing of which would have
599  * allocated the variant and playlist already)
600  * *pls == NULL => Master Playlist or parentless Media Playlist
601  * *pls != NULL => parented Media Playlist, playlist+variant allocated */
602 static int ensure_playlist(HLSContext *c, struct playlist **pls, const char *url)
603 {
604  if (*pls)
605  return 0;
606  if (!new_variant(c, NULL, url, NULL))
607  return AVERROR(ENOMEM);
608  *pls = c->playlists[c->n_playlists - 1];
609  return 0;
610 }
611 
613  const char *url, AVDictionary **options)
614 {
615 #if !CONFIG_HTTP_PROTOCOL
617 #else
618  int ret;
619  URLContext *uc = ffio_geturlcontext(*pb);
620  av_assert0(uc);
621  (*pb)->eof_reached = 0;
622  ret = ff_http_do_new_request2(uc, url, options);
623  if (ret < 0) {
624  ff_format_io_close(s, pb);
625  }
626  return ret;
627 #endif
628 }
629 
630 static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url,
631  AVDictionary **opts, AVDictionary *opts2, int *is_http_out)
632 {
633  HLSContext *c = s->priv_data;
634  AVDictionary *tmp = NULL;
635  const char *proto_name = NULL;
636  int ret;
637  int is_http = 0;
638 
639  if (av_strstart(url, "crypto", NULL)) {
640  if (url[6] == '+' || url[6] == ':')
641  proto_name = avio_find_protocol_name(url + 7);
642  } else if (av_strstart(url, "data", NULL)) {
643  if (url[4] == '+' || url[4] == ':')
644  proto_name = avio_find_protocol_name(url + 5);
645  }
646 
647  if (!proto_name)
648  proto_name = avio_find_protocol_name(url);
649 
650  if (!proto_name)
651  return AVERROR_INVALIDDATA;
652 
653  // only http(s) & file are allowed
654  if (av_strstart(proto_name, "file", NULL)) {
655  if (strcmp(c->allowed_extensions, "ALL") && !av_match_ext(url, c->allowed_extensions)) {
656  av_log(s, AV_LOG_ERROR,
657  "Filename extension of \'%s\' is not a common multimedia extension, blocked for security reasons.\n"
658  "If you wish to override this adjust allowed_extensions, you can set it to \'ALL\' to allow all\n",
659  url);
660  return AVERROR_INVALIDDATA;
661  }
662  } else if (av_strstart(proto_name, "http", NULL)) {
663  is_http = 1;
664  } else if (av_strstart(proto_name, "data", NULL)) {
665  ;
666  } else
667  return AVERROR_INVALIDDATA;
668 
669  if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':')
670  ;
671  else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':')
672  ;
673  else if (av_strstart(url, "data", NULL) && !strncmp(proto_name, url + 5, strlen(proto_name)) && url[5 + strlen(proto_name)] == ':')
674  ;
675  else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))
676  return AVERROR_INVALIDDATA;
677 
678  av_dict_copy(&tmp, *opts, 0);
679  av_dict_copy(&tmp, opts2, 0);
680 
681  if (is_http && c->http_persistent && *pb) {
682  ret = open_url_keepalive(c->ctx, pb, url, &tmp);
683  if (ret == AVERROR_EXIT) {
684  av_dict_free(&tmp);
685  return ret;
686  } else if (ret < 0) {
687  if (ret != AVERROR_EOF)
689  "keepalive request failed for '%s' with error: '%s' when opening url, retrying with new connection\n",
690  url, av_err2str(ret));
691  ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
692  }
693  } else {
694  ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
695  }
696  if (ret >= 0) {
697  // update cookies on http response with setcookies.
698  char *new_cookies = NULL;
699 
700  if (!(s->flags & AVFMT_FLAG_CUSTOM_IO))
701  av_opt_get(*pb, "cookies", AV_OPT_SEARCH_CHILDREN, (uint8_t**)&new_cookies);
702 
703  if (new_cookies)
704  av_dict_set(opts, "cookies", new_cookies, AV_DICT_DONT_STRDUP_VAL);
705  }
706 
707  av_dict_free(&tmp);
708 
709  if (is_http_out)
710  *is_http_out = is_http;
711 
712  return ret;
713 }
714 
715 static int parse_playlist(HLSContext *c, const char *url,
716  struct playlist *pls, AVIOContext *in)
717 {
718  int ret = 0, is_segment = 0, is_variant = 0;
719  int64_t duration = 0;
720  enum KeyType key_type = KEY_NONE;
721  uint8_t iv[16] = "";
722  int has_iv = 0;
723  char key[MAX_URL_SIZE] = "";
724  char line[MAX_URL_SIZE];
725  const char *ptr;
726  int close_in = 0;
727  int64_t seg_offset = 0;
728  int64_t seg_size = -1;
729  uint8_t *new_url = NULL;
730  struct variant_info variant_info;
731  char tmp_str[MAX_URL_SIZE];
732  struct segment *cur_init_section = NULL;
733  int is_http = av_strstart(url, "http", NULL);
734  struct segment **prev_segments = NULL;
735  int prev_n_segments = 0;
736  int prev_start_seq_no = -1;
737 
738  if (is_http && !in && c->http_persistent && c->playlist_pb) {
739  in = c->playlist_pb;
740  ret = open_url_keepalive(c->ctx, &c->playlist_pb, url, NULL);
741  if (ret == AVERROR_EXIT) {
742  return ret;
743  } else if (ret < 0) {
744  if (ret != AVERROR_EOF)
746  "keepalive request failed for '%s' with error: '%s' when parsing playlist\n",
747  url, av_err2str(ret));
748  in = NULL;
749  }
750  }
751 
752  if (!in) {
754  av_dict_copy(&opts, c->avio_opts, 0);
755 
756  if (c->http_persistent)
757  av_dict_set(&opts, "multiple_requests", "1", 0);
758 
759  ret = c->ctx->io_open(c->ctx, &in, url, AVIO_FLAG_READ, &opts);
760  av_dict_free(&opts);
761  if (ret < 0)
762  return ret;
763 
764  if (is_http && c->http_persistent)
765  c->playlist_pb = in;
766  else
767  close_in = 1;
768  }
769 
770  if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >= 0)
771  url = new_url;
772 
773  ff_get_chomp_line(in, line, sizeof(line));
774  if (strcmp(line, "#EXTM3U")) {
775  ret = AVERROR_INVALIDDATA;
776  goto fail;
777  }
778 
779  if (pls) {
780  prev_start_seq_no = pls->start_seq_no;
781  prev_segments = pls->segments;
782  prev_n_segments = pls->n_segments;
783  pls->segments = NULL;
784  pls->n_segments = 0;
785 
786  pls->finished = 0;
787  pls->type = PLS_TYPE_UNSPECIFIED;
788  }
789  while (!avio_feof(in)) {
790  ff_get_chomp_line(in, line, sizeof(line));
791  if (av_strstart(line, "#EXT-X-STREAM-INF:", &ptr)) {
792  is_variant = 1;
793  memset(&variant_info, 0, sizeof(variant_info));
795  &variant_info);
796  } else if (av_strstart(line, "#EXT-X-KEY:", &ptr)) {
797  struct key_info info = {{0}};
799  &info);
800  key_type = KEY_NONE;
801  has_iv = 0;
802  if (!strcmp(info.method, "AES-128"))
803  key_type = KEY_AES_128;
804  if (!strcmp(info.method, "SAMPLE-AES"))
805  key_type = KEY_SAMPLE_AES;
806  if (!strncmp(info.iv, "0x", 2) || !strncmp(info.iv, "0X", 2)) {
807  ff_hex_to_data(iv, info.iv + 2);
808  has_iv = 1;
809  }
810  av_strlcpy(key, info.uri, sizeof(key));
811  } else if (av_strstart(line, "#EXT-X-MEDIA:", &ptr)) {
812  struct rendition_info info = {{0}};
814  &info);
815  new_rendition(c, &info, url);
816  } else if (av_strstart(line, "#EXT-X-TARGETDURATION:", &ptr)) {
817  int64_t t;
818  ret = ensure_playlist(c, &pls, url);
819  if (ret < 0)
820  goto fail;
821  t = strtoll(ptr, NULL, 10);
822  if (t < 0 || t >= INT64_MAX / AV_TIME_BASE) {
823  ret = AVERROR_INVALIDDATA;
824  goto fail;
825  }
826  pls->target_duration = t * AV_TIME_BASE;
827  } else if (av_strstart(line, "#EXT-X-MEDIA-SEQUENCE:", &ptr)) {
828  ret = ensure_playlist(c, &pls, url);
829  if (ret < 0)
830  goto fail;
831  pls->start_seq_no = atoi(ptr);
832  } else if (av_strstart(line, "#EXT-X-PLAYLIST-TYPE:", &ptr)) {
833  ret = ensure_playlist(c, &pls, url);
834  if (ret < 0)
835  goto fail;
836  if (!strcmp(ptr, "EVENT"))
837  pls->type = PLS_TYPE_EVENT;
838  else if (!strcmp(ptr, "VOD"))
839  pls->type = PLS_TYPE_VOD;
840  } else if (av_strstart(line, "#EXT-X-MAP:", &ptr)) {
841  struct init_section_info info = {{0}};
842  ret = ensure_playlist(c, &pls, url);
843  if (ret < 0)
844  goto fail;
846  &info);
847  cur_init_section = new_init_section(pls, &info, url);
848  cur_init_section->key_type = key_type;
849  if (has_iv) {
850  memcpy(cur_init_section->iv, iv, sizeof(iv));
851  } else {
852  int seq = pls->start_seq_no + pls->n_segments;
853  memset(cur_init_section->iv, 0, sizeof(cur_init_section->iv));
854  AV_WB32(cur_init_section->iv + 12, seq);
855  }
856 
857  if (key_type != KEY_NONE) {
858  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, key);
859  if (!tmp_str[0]) {
860  av_free(cur_init_section);
861  ret = AVERROR_INVALIDDATA;
862  goto fail;
863  }
864  cur_init_section->key = av_strdup(tmp_str);
865  if (!cur_init_section->key) {
866  av_free(cur_init_section);
867  ret = AVERROR(ENOMEM);
868  goto fail;
869  }
870  } else {
871  cur_init_section->key = NULL;
872  }
873 
874  } else if (av_strstart(line, "#EXT-X-ENDLIST", &ptr)) {
875  if (pls)
876  pls->finished = 1;
877  } else if (av_strstart(line, "#EXTINF:", &ptr)) {
878  is_segment = 1;
879  duration = atof(ptr) * AV_TIME_BASE;
880  } else if (av_strstart(line, "#EXT-X-BYTERANGE:", &ptr)) {
881  seg_size = strtoll(ptr, NULL, 10);
882  ptr = strchr(ptr, '@');
883  if (ptr)
884  seg_offset = strtoll(ptr+1, NULL, 10);
885  } else if (av_strstart(line, "#", NULL)) {
886  av_log(c->ctx, AV_LOG_INFO, "Skip ('%s')\n", line);
887  continue;
888  } else if (line[0]) {
889  if (is_variant) {
890  if (!new_variant(c, &variant_info, line, url)) {
891  ret = AVERROR(ENOMEM);
892  goto fail;
893  }
894  is_variant = 0;
895  }
896  if (is_segment) {
897  struct segment *seg;
898  ret = ensure_playlist(c, &pls, url);
899  if (ret < 0)
900  goto fail;
901  seg = av_malloc(sizeof(struct segment));
902  if (!seg) {
903  ret = AVERROR(ENOMEM);
904  goto fail;
905  }
906  if (has_iv) {
907  memcpy(seg->iv, iv, sizeof(iv));
908  } else {
909  int seq = pls->start_seq_no + pls->n_segments;
910  memset(seg->iv, 0, sizeof(seg->iv));
911  AV_WB32(seg->iv + 12, seq);
912  }
913 
914  if (key_type != KEY_NONE) {
915  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, key);
916  if (!tmp_str[0]) {
917  ret = AVERROR_INVALIDDATA;
918  av_free(seg);
919  goto fail;
920  }
921  seg->key = av_strdup(tmp_str);
922  if (!seg->key) {
923  av_free(seg);
924  ret = AVERROR(ENOMEM);
925  goto fail;
926  }
927  } else {
928  seg->key = NULL;
929  }
930 
931  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, line);
932  if (!tmp_str[0]) {
933  ret = AVERROR_INVALIDDATA;
934  if (seg->key)
935  av_free(seg->key);
936  av_free(seg);
937  goto fail;
938  }
939  seg->url = av_strdup(tmp_str);
940  if (!seg->url) {
941  av_free(seg->key);
942  av_free(seg);
943  ret = AVERROR(ENOMEM);
944  goto fail;
945  }
946 
947  if (duration < 0.001 * AV_TIME_BASE) {
948  av_log(c->ctx, AV_LOG_WARNING, "Cannot get correct #EXTINF value of segment %s,"
949  " set to default value to 1ms.\n", seg->url);
950  duration = 0.001 * AV_TIME_BASE;
951  }
952  seg->duration = duration;
953  seg->key_type = key_type;
954  dynarray_add(&pls->segments, &pls->n_segments, seg);
955  is_segment = 0;
956 
957  seg->size = seg_size;
958  if (seg_size >= 0) {
959  seg->url_offset = seg_offset;
960  seg_offset += seg_size;
961  seg_size = -1;
962  } else {
963  seg->url_offset = 0;
964  seg_offset = 0;
965  }
966 
967  seg->init_section = cur_init_section;
968  }
969  }
970  }
971  if (prev_segments) {
972  if (pls->start_seq_no > prev_start_seq_no && c->first_timestamp != AV_NOPTS_VALUE) {
973  int64_t prev_timestamp = c->first_timestamp;
974  int i, diff = pls->start_seq_no - prev_start_seq_no;
975  for (i = 0; i < prev_n_segments && i < diff; i++) {
976  c->first_timestamp += prev_segments[i]->duration;
977  }
978  av_log(c->ctx, AV_LOG_DEBUG, "Media sequence change (%d -> %d)"
979  " reflected in first_timestamp: %"PRId64" -> %"PRId64"\n",
980  prev_start_seq_no, pls->start_seq_no,
981  prev_timestamp, c->first_timestamp);
982  } else if (pls->start_seq_no < prev_start_seq_no) {
983  av_log(c->ctx, AV_LOG_WARNING, "Media sequence changed unexpectedly: %d -> %d\n",
984  prev_start_seq_no, pls->start_seq_no);
985  }
986  free_segment_dynarray(prev_segments, prev_n_segments);
987  av_freep(&prev_segments);
988  }
989  if (pls)
991 
992 fail:
993  av_free(new_url);
994  if (close_in)
995  ff_format_io_close(c->ctx, &in);
996  c->ctx->ctx_flags = c->ctx->ctx_flags & ~(unsigned)AVFMTCTX_UNSEEKABLE;
997  if (!c->n_variants || !c->variants[0]->n_playlists ||
998  !(c->variants[0]->playlists[0]->finished ||
999  c->variants[0]->playlists[0]->type == PLS_TYPE_EVENT))
1001  return ret;
1002 }
1003 
1004 static struct segment *current_segment(struct playlist *pls)
1005 {
1006  return pls->segments[pls->cur_seq_no - pls->start_seq_no];
1007 }
1008 
1009 static struct segment *next_segment(struct playlist *pls)
1010 {
1011  int n = pls->cur_seq_no - pls->start_seq_no + 1;
1012  if (n >= pls->n_segments)
1013  return NULL;
1014  return pls->segments[n];
1015 }
1016 
1017 static int read_from_url(struct playlist *pls, struct segment *seg,
1018  uint8_t *buf, int buf_size)
1019 {
1020  int ret;
1021 
1022  /* limit read if the segment was only a part of a file */
1023  if (seg->size >= 0)
1024  buf_size = FFMIN(buf_size, seg->size - pls->cur_seg_offset);
1025 
1026  ret = avio_read(pls->input, buf, buf_size);
1027  if (ret > 0)
1028  pls->cur_seg_offset += ret;
1029 
1030  return ret;
1031 }
1032 
1033 /* Parse the raw ID3 data and pass contents to caller */
1035  AVDictionary **metadata, int64_t *dts,
1036  ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta **extra_meta)
1037 {
1038  static const char id3_priv_owner_ts[] = "com.apple.streaming.transportStreamTimestamp";
1039  ID3v2ExtraMeta *meta;
1040 
1041  ff_id3v2_read_dict(pb, metadata, ID3v2_DEFAULT_MAGIC, extra_meta);
1042  for (meta = *extra_meta; meta; meta = meta->next) {
1043  if (!strcmp(meta->tag, "PRIV")) {
1044  ID3v2ExtraMetaPRIV *priv = &meta->data.priv;
1045  if (priv->datasize == 8 && !strcmp(priv->owner, id3_priv_owner_ts)) {
1046  /* 33-bit MPEG timestamp */
1047  int64_t ts = AV_RB64(priv->data);
1048  av_log(s, AV_LOG_DEBUG, "HLS ID3 audio timestamp %"PRId64"\n", ts);
1049  if ((ts & ~((1ULL << 33) - 1)) == 0)
1050  *dts = ts;
1051  else
1052  av_log(s, AV_LOG_ERROR, "Invalid HLS ID3 audio timestamp %"PRId64"\n", ts);
1053  }
1054  } else if (!strcmp(meta->tag, "APIC") && apic)
1055  *apic = &meta->data.apic;
1056  }
1057 }
1058 
1059 /* Check if the ID3 metadata contents have changed */
1060 static int id3_has_changed_values(struct playlist *pls, AVDictionary *metadata,
1061  ID3v2ExtraMetaAPIC *apic)
1062 {
1063  AVDictionaryEntry *entry = NULL;
1064  AVDictionaryEntry *oldentry;
1065  /* check that no keys have changed values */
1066  while ((entry = av_dict_get(metadata, "", entry, AV_DICT_IGNORE_SUFFIX))) {
1067  oldentry = av_dict_get(pls->id3_initial, entry->key, NULL, AV_DICT_MATCH_CASE);
1068  if (!oldentry || strcmp(oldentry->value, entry->value) != 0)
1069  return 1;
1070  }
1071 
1072  /* check if apic appeared */
1073  if (apic && (pls->ctx->nb_streams != 2 || !pls->ctx->streams[1]->attached_pic.data))
1074  return 1;
1075 
1076  if (apic) {
1077  int size = pls->ctx->streams[1]->attached_pic.size;
1078  if (size != apic->buf->size - AV_INPUT_BUFFER_PADDING_SIZE)
1079  return 1;
1080 
1081  if (memcmp(apic->buf->data, pls->ctx->streams[1]->attached_pic.data, size) != 0)
1082  return 1;
1083  }
1084 
1085  return 0;
1086 }
1087 
1088 /* Parse ID3 data and handle the found data */
1089 static void handle_id3(AVIOContext *pb, struct playlist *pls)
1090 {
1091  AVDictionary *metadata = NULL;
1092  ID3v2ExtraMetaAPIC *apic = NULL;
1093  ID3v2ExtraMeta *extra_meta = NULL;
1094  int64_t timestamp = AV_NOPTS_VALUE;
1095 
1096  parse_id3(pls->ctx, pb, &metadata, &timestamp, &apic, &extra_meta);
1097 
1098  if (timestamp != AV_NOPTS_VALUE) {
1099  pls->id3_mpegts_timestamp = timestamp;
1100  pls->id3_offset = 0;
1101  }
1102 
1103  if (!pls->id3_found) {
1104  /* initial ID3 tags */
1106  pls->id3_found = 1;
1107 
1108  /* get picture attachment and set text metadata */
1109  if (pls->ctx->nb_streams)
1110  ff_id3v2_parse_apic(pls->ctx, extra_meta);
1111  else
1112  /* demuxer not yet opened, defer picture attachment */
1113  pls->id3_deferred_extra = extra_meta;
1114 
1115  ff_id3v2_parse_priv_dict(&metadata, extra_meta);
1116  av_dict_copy(&pls->ctx->metadata, metadata, 0);
1117  pls->id3_initial = metadata;
1118 
1119  } else {
1120  if (!pls->id3_changed && id3_has_changed_values(pls, metadata, apic)) {
1121  avpriv_report_missing_feature(pls->parent, "Changing ID3 metadata in HLS audio elementary stream");
1122  pls->id3_changed = 1;
1123  }
1124  av_dict_free(&metadata);
1125  }
1126 
1127  if (!pls->id3_deferred_extra)
1128  ff_id3v2_free_extra_meta(&extra_meta);
1129 }
1130 
1131 static void intercept_id3(struct playlist *pls, uint8_t *buf,
1132  int buf_size, int *len)
1133 {
1134  /* intercept id3 tags, we do not want to pass them to the raw
1135  * demuxer on all segment switches */
1136  int bytes;
1137  int id3_buf_pos = 0;
1138  int fill_buf = 0;
1139  struct segment *seg = current_segment(pls);
1140 
1141  /* gather all the id3 tags */
1142  while (1) {
1143  /* see if we can retrieve enough data for ID3 header */
1144  if (*len < ID3v2_HEADER_SIZE && buf_size >= ID3v2_HEADER_SIZE) {
1145  bytes = read_from_url(pls, seg, buf + *len, ID3v2_HEADER_SIZE - *len);
1146  if (bytes > 0) {
1147 
1148  if (bytes == ID3v2_HEADER_SIZE - *len)
1149  /* no EOF yet, so fill the caller buffer again after
1150  * we have stripped the ID3 tags */
1151  fill_buf = 1;
1152 
1153  *len += bytes;
1154 
1155  } else if (*len <= 0) {
1156  /* error/EOF */
1157  *len = bytes;
1158  fill_buf = 0;
1159  }
1160  }
1161 
1162  if (*len < ID3v2_HEADER_SIZE)
1163  break;
1164 
1165  if (ff_id3v2_match(buf, ID3v2_DEFAULT_MAGIC)) {
1166  int64_t maxsize = seg->size >= 0 ? seg->size : 1024*1024;
1167  int taglen = ff_id3v2_tag_len(buf);
1168  int tag_got_bytes = FFMIN(taglen, *len);
1169  int remaining = taglen - tag_got_bytes;
1170 
1171  if (taglen > maxsize) {
1172  av_log(pls->parent, AV_LOG_ERROR, "Too large HLS ID3 tag (%d > %"PRId64" bytes)\n",
1173  taglen, maxsize);
1174  break;
1175  }
1176 
1177  /*
1178  * Copy the id3 tag to our temporary id3 buffer.
1179  * We could read a small id3 tag directly without memcpy, but
1180  * we would still need to copy the large tags, and handling
1181  * both of those cases together with the possibility for multiple
1182  * tags would make the handling a bit complex.
1183  */
1184  pls->id3_buf = av_fast_realloc(pls->id3_buf, &pls->id3_buf_size, id3_buf_pos + taglen);
1185  if (!pls->id3_buf)
1186  break;
1187  memcpy(pls->id3_buf + id3_buf_pos, buf, tag_got_bytes);
1188  id3_buf_pos += tag_got_bytes;
1189 
1190  /* strip the intercepted bytes */
1191  *len -= tag_got_bytes;
1192  memmove(buf, buf + tag_got_bytes, *len);
1193  av_log(pls->parent, AV_LOG_DEBUG, "Stripped %d HLS ID3 bytes\n", tag_got_bytes);
1194 
1195  if (remaining > 0) {
1196  /* read the rest of the tag in */
1197  if (read_from_url(pls, seg, pls->id3_buf + id3_buf_pos, remaining) != remaining)
1198  break;
1199  id3_buf_pos += remaining;
1200  av_log(pls->parent, AV_LOG_DEBUG, "Stripped additional %d HLS ID3 bytes\n", remaining);
1201  }
1202 
1203  } else {
1204  /* no more ID3 tags */
1205  break;
1206  }
1207  }
1208 
1209  /* re-fill buffer for the caller unless EOF */
1210  if (*len >= 0 && (fill_buf || *len == 0)) {
1211  bytes = read_from_url(pls, seg, buf + *len, buf_size - *len);
1212 
1213  /* ignore error if we already had some data */
1214  if (bytes >= 0)
1215  *len += bytes;
1216  else if (*len == 0)
1217  *len = bytes;
1218  }
1219 
1220  if (pls->id3_buf) {
1221  /* Now parse all the ID3 tags */
1222  AVIOContext id3ioctx;
1223  ffio_init_context(&id3ioctx, pls->id3_buf, id3_buf_pos, 0, NULL, NULL, NULL, NULL);
1224  handle_id3(&id3ioctx, pls);
1225  }
1226 
1227  if (pls->is_id3_timestamped == -1)
1229 }
1230 
1231 static int open_input(HLSContext *c, struct playlist *pls, struct segment *seg, AVIOContext **in)
1232 {
1233  AVDictionary *opts = NULL;
1234  int ret;
1235  int is_http = 0;
1236 
1237  if (c->http_persistent)
1238  av_dict_set(&opts, "multiple_requests", "1", 0);
1239 
1240  if (seg->size >= 0) {
1241  /* try to restrict the HTTP request to the part we want
1242  * (if this is in fact a HTTP request) */
1243  av_dict_set_int(&opts, "offset", seg->url_offset, 0);
1244  av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
1245  }
1246 
1247  av_log(pls->parent, AV_LOG_VERBOSE, "HLS request for url '%s', offset %"PRId64", playlist %d\n",
1248  seg->url, seg->url_offset, pls->index);
1249 
1250  if (seg->key_type == KEY_NONE) {
1251  ret = open_url(pls->parent, in, seg->url, &c->avio_opts, opts, &is_http);
1252  } else if (seg->key_type == KEY_AES_128) {
1253  char iv[33], key[33], url[MAX_URL_SIZE];
1254  if (strcmp(seg->key, pls->key_url)) {
1255  AVIOContext *pb = NULL;
1256  if (open_url(pls->parent, &pb, seg->key, &c->avio_opts, opts, NULL) == 0) {
1257  ret = avio_read(pb, pls->key, sizeof(pls->key));
1258  if (ret != sizeof(pls->key)) {
1259  av_log(pls->parent, AV_LOG_ERROR, "Unable to read key file %s\n",
1260  seg->key);
1261  }
1262  ff_format_io_close(pls->parent, &pb);
1263  } else {
1264  av_log(pls->parent, AV_LOG_ERROR, "Unable to open key file %s\n",
1265  seg->key);
1266  }
1267  av_strlcpy(pls->key_url, seg->key, sizeof(pls->key_url));
1268  }
1269  ff_data_to_hex(iv, seg->iv, sizeof(seg->iv), 0);
1270  ff_data_to_hex(key, pls->key, sizeof(pls->key), 0);
1271  iv[32] = key[32] = '\0';
1272  if (strstr(seg->url, "://"))
1273  snprintf(url, sizeof(url), "crypto+%s", seg->url);
1274  else
1275  snprintf(url, sizeof(url), "crypto:%s", seg->url);
1276 
1277  av_dict_set(&opts, "key", key, 0);
1278  av_dict_set(&opts, "iv", iv, 0);
1279 
1280  ret = open_url(pls->parent, in, url, &c->avio_opts, opts, &is_http);
1281  if (ret < 0) {
1282  goto cleanup;
1283  }
1284  ret = 0;
1285  } else if (seg->key_type == KEY_SAMPLE_AES) {
1286  av_log(pls->parent, AV_LOG_ERROR,
1287  "SAMPLE-AES encryption is not supported yet\n");
1288  ret = AVERROR_PATCHWELCOME;
1289  }
1290  else
1291  ret = AVERROR(ENOSYS);
1292 
1293  /* Seek to the requested position. If this was a HTTP request, the offset
1294  * should already be where want it to, but this allows e.g. local testing
1295  * without a HTTP server.
1296  *
1297  * This is not done for HTTP at all as avio_seek() does internal bookkeeping
1298  * of file offset which is out-of-sync with the actual offset when "offset"
1299  * AVOption is used with http protocol, causing the seek to not be a no-op
1300  * as would be expected. Wrong offset received from the server will not be
1301  * noticed without the call, though.
1302  */
1303  if (ret == 0 && !is_http && seg->key_type == KEY_NONE && seg->url_offset) {
1304  int64_t seekret = avio_seek(*in, seg->url_offset, SEEK_SET);
1305  if (seekret < 0) {
1306  av_log(pls->parent, AV_LOG_ERROR, "Unable to seek to offset %"PRId64" of HLS segment '%s'\n", seg->url_offset, seg->url);
1307  ret = seekret;
1308  ff_format_io_close(pls->parent, in);
1309  }
1310  }
1311 
1312 cleanup:
1313  av_dict_free(&opts);
1314  pls->cur_seg_offset = 0;
1315  return ret;
1316 }
1317 
1318 static int update_init_section(struct playlist *pls, struct segment *seg)
1319 {
1320  static const int max_init_section_size = 1024*1024;
1321  HLSContext *c = pls->parent->priv_data;
1322  int64_t sec_size;
1323  int64_t urlsize;
1324  int ret;
1325 
1326  if (seg->init_section == pls->cur_init_section)
1327  return 0;
1328 
1329  pls->cur_init_section = NULL;
1330 
1331  if (!seg->init_section)
1332  return 0;
1333 
1334  ret = open_input(c, pls, seg->init_section, &pls->input);
1335  if (ret < 0) {
1337  "Failed to open an initialization section in playlist %d\n",
1338  pls->index);
1339  return ret;
1340  }
1341 
1342  if (seg->init_section->size >= 0)
1343  sec_size = seg->init_section->size;
1344  else if ((urlsize = avio_size(pls->input)) >= 0)
1345  sec_size = urlsize;
1346  else
1347  sec_size = max_init_section_size;
1348 
1349  av_log(pls->parent, AV_LOG_DEBUG,
1350  "Downloading an initialization section of size %"PRId64"\n",
1351  sec_size);
1352 
1353  sec_size = FFMIN(sec_size, max_init_section_size);
1354 
1355  av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size);
1356 
1357  ret = read_from_url(pls, seg->init_section, pls->init_sec_buf,
1358  pls->init_sec_buf_size);
1359  ff_format_io_close(pls->parent, &pls->input);
1360 
1361  if (ret < 0)
1362  return ret;
1363 
1364  pls->cur_init_section = seg->init_section;
1365  pls->init_sec_data_len = ret;
1366  pls->init_sec_buf_read_offset = 0;
1367 
1368  /* spec says audio elementary streams do not have media initialization
1369  * sections, so there should be no ID3 timestamps */
1370  pls->is_id3_timestamped = 0;
1371 
1372  return 0;
1373 }
1374 
1375 static int64_t default_reload_interval(struct playlist *pls)
1376 {
1377  return pls->n_segments > 0 ?
1378  pls->segments[pls->n_segments - 1]->duration :
1379  pls->target_duration;
1380 }
1381 
1382 static int playlist_needed(struct playlist *pls)
1383 {
1384  AVFormatContext *s = pls->parent;
1385  int i, j;
1386  int stream_needed = 0;
1387  int first_st;
1388 
1389  /* If there is no context or streams yet, the playlist is needed */
1390  if (!pls->ctx || !pls->n_main_streams)
1391  return 1;
1392 
1393  /* check if any of the streams in the playlist are needed */
1394  for (i = 0; i < pls->n_main_streams; i++) {
1395  if (pls->main_streams[i]->discard < AVDISCARD_ALL) {
1396  stream_needed = 1;
1397  break;
1398  }
1399  }
1400 
1401  /* If all streams in the playlist were discarded, the playlist is not
1402  * needed (regardless of whether whole programs are discarded or not). */
1403  if (!stream_needed)
1404  return 0;
1405 
1406  /* Otherwise, check if all the programs (variants) this playlist is in are
1407  * discarded. Since all streams in the playlist are part of the same programs
1408  * we can just check the programs of the first stream. */
1409 
1410  first_st = pls->main_streams[0]->index;
1411 
1412  for (i = 0; i < s->nb_programs; i++) {
1413  AVProgram *program = s->programs[i];
1414  if (program->discard < AVDISCARD_ALL) {
1415  for (j = 0; j < program->nb_stream_indexes; j++) {
1416  if (program->stream_index[j] == first_st) {
1417  /* playlist is in an undiscarded program */
1418  return 1;
1419  }
1420  }
1421  }
1422  }
1423 
1424  /* some streams were not discarded but all the programs were */
1425  return 0;
1426 }
1427 
1428 static int read_data(void *opaque, uint8_t *buf, int buf_size)
1429 {
1430  struct playlist *v = opaque;
1431  HLSContext *c = v->parent->priv_data;
1432  int ret;
1433  int just_opened = 0;
1434  int reload_count = 0;
1435  struct segment *seg;
1436 
1437 restart:
1438  if (!v->needed)
1439  return AVERROR_EOF;
1440 
1441  if (!v->input || (c->http_persistent && v->input_read_done)) {
1442  int64_t reload_interval;
1443 
1444  /* Check that the playlist is still needed before opening a new
1445  * segment. */
1446  v->needed = playlist_needed(v);
1447 
1448  if (!v->needed) {
1449  av_log(v->parent, AV_LOG_INFO, "No longer receiving playlist %d ('%s')\n",
1450  v->index, v->url);
1451  return AVERROR_EOF;
1452  }
1453 
1454  /* If this is a live stream and the reload interval has elapsed since
1455  * the last playlist reload, reload the playlists now. */
1456  reload_interval = default_reload_interval(v);
1457 
1458 reload:
1459  reload_count++;
1460  if (reload_count > c->max_reload)
1461  return AVERROR_EOF;
1462  if (!v->finished &&
1463  av_gettime_relative() - v->last_load_time >= reload_interval) {
1464  if ((ret = parse_playlist(c, v->url, v, NULL)) < 0) {
1465  if (ret != AVERROR_EXIT)
1466  av_log(v->parent, AV_LOG_WARNING, "Failed to reload playlist %d\n",
1467  v->index);
1468  return ret;
1469  }
1470  /* If we need to reload the playlist again below (if
1471  * there's still no more segments), switch to a reload
1472  * interval of half the target duration. */
1473  reload_interval = v->target_duration / 2;
1474  }
1475  if (v->cur_seq_no < v->start_seq_no) {
1477  "skipping %d segments ahead, expired from playlists\n",
1478  v->start_seq_no - v->cur_seq_no);
1479  v->cur_seq_no = v->start_seq_no;
1480  }
1481  if (v->cur_seq_no > v->last_seq_no) {
1482  v->last_seq_no = v->cur_seq_no;
1483  v->m3u8_hold_counters = 0;
1484  } else if (v->last_seq_no == v->cur_seq_no) {
1485  v->m3u8_hold_counters++;
1486  if (v->m3u8_hold_counters >= c->m3u8_hold_counters) {
1487  return AVERROR_EOF;
1488  }
1489  } else {
1490  av_log(v->parent, AV_LOG_WARNING, "maybe the m3u8 list sequence have been wraped.\n");
1491  }
1492  if (v->cur_seq_no >= v->start_seq_no + v->n_segments) {
1493  if (v->finished)
1494  return AVERROR_EOF;
1495  while (av_gettime_relative() - v->last_load_time < reload_interval) {
1497  return AVERROR_EXIT;
1498  av_usleep(100*1000);
1499  }
1500  /* Enough time has elapsed since the last reload */
1501  goto reload;
1502  }
1503 
1504  v->input_read_done = 0;
1505  seg = current_segment(v);
1506 
1507  /* load/update Media Initialization Section, if any */
1508  ret = update_init_section(v, seg);
1509  if (ret)
1510  return ret;
1511 
1512  if (c->http_multiple == 1 && v->input_next_requested) {
1513  FFSWAP(AVIOContext *, v->input, v->input_next);
1514  v->cur_seg_offset = 0;
1515  v->input_next_requested = 0;
1516  ret = 0;
1517  } else {
1518  ret = open_input(c, v, seg, &v->input);
1519  }
1520  if (ret < 0) {
1522  return AVERROR_EXIT;
1523  av_log(v->parent, AV_LOG_WARNING, "Failed to open segment %d of playlist %d\n",
1524  v->cur_seq_no,
1525  v->index);
1526  v->cur_seq_no += 1;
1527  goto reload;
1528  }
1529  just_opened = 1;
1530  }
1531 
1532  if (c->http_multiple == -1) {
1533  uint8_t *http_version_opt = NULL;
1534  int r = av_opt_get(v->input, "http_version", AV_OPT_SEARCH_CHILDREN, &http_version_opt);
1535  if (r >= 0) {
1536  c->http_multiple = (!strncmp((const char *)http_version_opt, "1.1", 3) || !strncmp((const char *)http_version_opt, "2.0", 3));
1537  av_freep(&http_version_opt);
1538  }
1539  }
1540 
1541  seg = next_segment(v);
1542  if (c->http_multiple == 1 && !v->input_next_requested &&
1543  seg && seg->key_type == KEY_NONE && av_strstart(seg->url, "http", NULL)) {
1544  ret = open_input(c, v, seg, &v->input_next);
1545  if (ret < 0) {
1547  return AVERROR_EXIT;
1548  av_log(v->parent, AV_LOG_WARNING, "Failed to open next segment %d of playlist %d\n",
1549  v->cur_seq_no + 1,
1550  v->index);
1551  } else {
1552  v->input_next_requested = 1;
1553  }
1554  }
1555 
1557  /* Push init section out first before first actual segment */
1558  int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size);
1559  memcpy(buf, v->init_sec_buf, copy_size);
1560  v->init_sec_buf_read_offset += copy_size;
1561  return copy_size;
1562  }
1563 
1564  seg = current_segment(v);
1565  ret = read_from_url(v, seg, buf, buf_size);
1566  if (ret > 0) {
1567  if (just_opened && v->is_id3_timestamped != 0) {
1568  /* Intercept ID3 tags here, elementary audio streams are required
1569  * to convey timestamps using them in the beginning of each segment. */
1570  intercept_id3(v, buf, buf_size, &ret);
1571  }
1572 
1573  return ret;
1574  }
1575  if (c->http_persistent &&
1576  seg->key_type == KEY_NONE && av_strstart(seg->url, "http", NULL)) {
1577  v->input_read_done = 1;
1578  } else {
1579  ff_format_io_close(v->parent, &v->input);
1580  }
1581  v->cur_seq_no++;
1582 
1583  c->cur_seq_no = v->cur_seq_no;
1584 
1585  goto restart;
1586 }
1587 
1588 static void add_renditions_to_variant(HLSContext *c, struct variant *var,
1589  enum AVMediaType type, const char *group_id)
1590 {
1591  int i;
1592 
1593  for (i = 0; i < c->n_renditions; i++) {
1594  struct rendition *rend = c->renditions[i];
1595 
1596  if (rend->type == type && !strcmp(rend->group_id, group_id)) {
1597 
1598  if (rend->playlist)
1599  /* rendition is an external playlist
1600  * => add the playlist to the variant */
1601  dynarray_add(&var->playlists, &var->n_playlists, rend->playlist);
1602  else
1603  /* rendition is part of the variant main Media Playlist
1604  * => add the rendition to the main Media Playlist */
1605  dynarray_add(&var->playlists[0]->renditions,
1606  &var->playlists[0]->n_renditions,
1607  rend);
1608  }
1609  }
1610 }
1611 
1613  enum AVMediaType type)
1614 {
1615  int rend_idx = 0;
1616  int i;
1617 
1618  for (i = 0; i < pls->n_main_streams; i++) {
1619  AVStream *st = pls->main_streams[i];
1620 
1621  if (st->codecpar->codec_type != type)
1622  continue;
1623 
1624  for (; rend_idx < pls->n_renditions; rend_idx++) {
1625  struct rendition *rend = pls->renditions[rend_idx];
1626 
1627  if (rend->type != type)
1628  continue;
1629 
1630  if (rend->language[0])
1631  av_dict_set(&st->metadata, "language", rend->language, 0);
1632  if (rend->name[0])
1633  av_dict_set(&st->metadata, "comment", rend->name, 0);
1634 
1635  st->disposition |= rend->disposition;
1636  }
1637  if (rend_idx >=pls->n_renditions)
1638  break;
1639  }
1640 }
1641 
1642 /* if timestamp was in valid range: returns 1 and sets seq_no
1643  * if not: returns 0 and sets seq_no to closest segment */
1645  int64_t timestamp, int *seq_no)
1646 {
1647  int i;
1648  int64_t pos = c->first_timestamp == AV_NOPTS_VALUE ?
1649  0 : c->first_timestamp;
1650 
1651  if (timestamp < pos) {
1652  *seq_no = pls->start_seq_no;
1653  return 0;
1654  }
1655 
1656  for (i = 0; i < pls->n_segments; i++) {
1657  int64_t diff = pos + pls->segments[i]->duration - timestamp;
1658  if (diff > 0) {
1659  *seq_no = pls->start_seq_no + i;
1660  return 1;
1661  }
1662  pos += pls->segments[i]->duration;
1663  }
1664 
1665  *seq_no = pls->start_seq_no + pls->n_segments - 1;
1666 
1667  return 0;
1668 }
1669 
1670 static int select_cur_seq_no(HLSContext *c, struct playlist *pls)
1671 {
1672  int seq_no;
1673 
1674  if (!pls->finished && !c->first_packet &&
1676  /* reload the playlist since it was suspended */
1677  parse_playlist(c, pls->url, pls, NULL);
1678 
1679  /* If playback is already in progress (we are just selecting a new
1680  * playlist) and this is a complete file, find the matching segment
1681  * by counting durations. */
1682  if (pls->finished && c->cur_timestamp != AV_NOPTS_VALUE) {
1683  find_timestamp_in_playlist(c, pls, c->cur_timestamp, &seq_no);
1684  return seq_no;
1685  }
1686 
1687  if (!pls->finished) {
1688  if (!c->first_packet && /* we are doing a segment selection during playback */
1689  c->cur_seq_no >= pls->start_seq_no &&
1690  c->cur_seq_no < pls->start_seq_no + pls->n_segments)
1691  /* While spec 3.4.3 says that we cannot assume anything about the
1692  * content at the same sequence number on different playlists,
1693  * in practice this seems to work and doing it otherwise would
1694  * require us to download a segment to inspect its timestamps. */
1695  return c->cur_seq_no;
1696 
1697  /* If this is a live stream, start live_start_index segments from the
1698  * start or end */
1699  if (c->live_start_index < 0)
1700  return pls->start_seq_no + FFMAX(pls->n_segments + c->live_start_index, 0);
1701  else
1702  return pls->start_seq_no + FFMIN(c->live_start_index, pls->n_segments - 1);
1703  }
1704 
1705  /* Otherwise just start on the first segment. */
1706  return pls->start_seq_no;
1707 }
1708 
1710 {
1711  HLSContext *c = s->priv_data;
1712  static const char * const opts[] = {
1713  "headers", "http_proxy", "user_agent", "cookies", "referer", "rw_timeout", "icy", NULL };
1714  const char * const * opt = opts;
1715  uint8_t *buf;
1716  int ret = 0;
1717 
1718  while (*opt) {
1719  if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN | AV_OPT_ALLOW_NULL, &buf) >= 0) {
1720  ret = av_dict_set(&c->avio_opts, *opt, buf,
1722  if (ret < 0)
1723  return ret;
1724  }
1725  opt++;
1726  }
1727 
1728  return ret;
1729 }
1730 
1731 static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url,
1732  int flags, AVDictionary **opts)
1733 {
1734  av_log(s, AV_LOG_ERROR,
1735  "A HLS playlist item '%s' referred to an external file '%s'. "
1736  "Opening this file was forbidden for security reasons\n",
1737  s->url, url);
1738  return AVERROR(EPERM);
1739 }
1740 
1741 static void add_stream_to_programs(AVFormatContext *s, struct playlist *pls, AVStream *stream)
1742 {
1743  HLSContext *c = s->priv_data;
1744  int i, j;
1745  int bandwidth = -1;
1746 
1747  for (i = 0; i < c->n_variants; i++) {
1748  struct variant *v = c->variants[i];
1749 
1750  for (j = 0; j < v->n_playlists; j++) {
1751  if (v->playlists[j] != pls)
1752  continue;
1753 
1754  av_program_add_stream_index(s, i, stream->index);
1755 
1756  if (bandwidth < 0)
1757  bandwidth = v->bandwidth;
1758  else if (bandwidth != v->bandwidth)
1759  bandwidth = -1; /* stream in multiple variants with different bandwidths */
1760  }
1761  }
1762 
1763  if (bandwidth >= 0)
1764  av_dict_set_int(&stream->metadata, "variant_bitrate", bandwidth, 0);
1765 }
1766 
1768 {
1769  int err;
1770 
1771  err = avcodec_parameters_copy(st->codecpar, ist->codecpar);
1772  if (err < 0)
1773  return err;
1774 
1775  if (pls->is_id3_timestamped) /* custom timestamps via id3 */
1776  avpriv_set_pts_info(st, 33, 1, MPEG_TIME_BASE);
1777  else
1779 
1780  st->internal->need_context_update = 1;
1781 
1782  return 0;
1783 }
1784 
1785 /* add new subdemuxer streams to our context, if any */
1787 {
1788  int err;
1789 
1790  while (pls->n_main_streams < pls->ctx->nb_streams) {
1791  int ist_idx = pls->n_main_streams;
1792  AVStream *st = avformat_new_stream(s, NULL);
1793  AVStream *ist = pls->ctx->streams[ist_idx];
1794 
1795  if (!st)
1796  return AVERROR(ENOMEM);
1797 
1798  st->id = pls->index;
1799  dynarray_add(&pls->main_streams, &pls->n_main_streams, st);
1800 
1801  add_stream_to_programs(s, pls, st);
1802 
1803  err = set_stream_info_from_input_stream(st, pls, ist);
1804  if (err < 0)
1805  return err;
1806  }
1807 
1808  return 0;
1809 }
1810 
1812 {
1813  HLSContext *c = s->priv_data;
1814  int flag_needed = 0;
1815  int i;
1816 
1817  for (i = 0; i < c->n_playlists; i++) {
1818  struct playlist *pls = c->playlists[i];
1819 
1820  if (pls->has_noheader_flag) {
1821  flag_needed = 1;
1822  break;
1823  }
1824  }
1825 
1826  if (flag_needed)
1828  else
1830 }
1831 
1833 {
1834  HLSContext *c = s->priv_data;
1835 
1836  free_playlist_list(c);
1837  free_variant_list(c);
1839 
1840  av_dict_free(&c->avio_opts);
1842 
1843  return 0;
1844 }
1845 
1847 {
1848  HLSContext *c = s->priv_data;
1849  int ret = 0, i;
1850  int highest_cur_seq_no = 0;
1851 
1852  c->ctx = s;
1854 
1855  c->first_packet = 1;
1858 
1859  if ((ret = save_avio_options(s)) < 0)
1860  goto fail;
1861 
1862  /* XXX: Some HLS servers don't like being sent the range header,
1863  in this case, need to setting http_seekable = 0 to disable
1864  the range header */
1865  av_dict_set_int(&c->avio_opts, "seekable", c->http_seekable, 0);
1866 
1867  if ((ret = parse_playlist(c, s->url, NULL, s->pb)) < 0)
1868  goto fail;
1869 
1870  if (c->n_variants == 0) {
1871  av_log(s, AV_LOG_WARNING, "Empty playlist\n");
1872  ret = AVERROR_EOF;
1873  goto fail;
1874  }
1875  /* If the playlist only contained playlists (Master Playlist),
1876  * parse each individual playlist. */
1877  if (c->n_playlists > 1 || c->playlists[0]->n_segments == 0) {
1878  for (i = 0; i < c->n_playlists; i++) {
1879  struct playlist *pls = c->playlists[i];
1880  pls->m3u8_hold_counters = 0;
1881  if ((ret = parse_playlist(c, pls->url, pls, NULL)) < 0) {
1882  av_log(s, AV_LOG_WARNING, "parse_playlist error %s [%s]\n", av_err2str(ret), pls->url);
1883  pls->broken = 1;
1884  if (c->n_playlists > 1)
1885  continue;
1886  goto fail;
1887  }
1888  }
1889  }
1890 
1891  for (i = 0; i < c->n_variants; i++) {
1892  if (c->variants[i]->playlists[0]->n_segments == 0) {
1893  av_log(s, AV_LOG_WARNING, "Empty segment [%s]\n", c->variants[i]->playlists[0]->url);
1894  c->variants[i]->playlists[0]->broken = 1;
1895  }
1896  }
1897 
1898  /* If this isn't a live stream, calculate the total duration of the
1899  * stream. */
1900  if (c->variants[0]->playlists[0]->finished) {
1901  int64_t duration = 0;
1902  for (i = 0; i < c->variants[0]->playlists[0]->n_segments; i++)
1903  duration += c->variants[0]->playlists[0]->segments[i]->duration;
1904  s->duration = duration;
1905  }
1906 
1907  /* Associate renditions with variants */
1908  for (i = 0; i < c->n_variants; i++) {
1909  struct variant *var = c->variants[i];
1910 
1911  if (var->audio_group[0])
1913  if (var->video_group[0])
1915  if (var->subtitles_group[0])
1917  }
1918 
1919  /* Create a program for each variant */
1920  for (i = 0; i < c->n_variants; i++) {
1921  struct variant *v = c->variants[i];
1922  AVProgram *program;
1923 
1924  program = av_new_program(s, i);
1925  if (!program)
1926  goto fail;
1927  av_dict_set_int(&program->metadata, "variant_bitrate", v->bandwidth, 0);
1928  }
1929 
1930  /* Select the starting segments */
1931  for (i = 0; i < c->n_playlists; i++) {
1932  struct playlist *pls = c->playlists[i];
1933 
1934  if (pls->n_segments == 0)
1935  continue;
1936 
1937  pls->cur_seq_no = select_cur_seq_no(c, pls);
1938  highest_cur_seq_no = FFMAX(highest_cur_seq_no, pls->cur_seq_no);
1939  }
1940 
1941  /* Open the demuxer for each playlist */
1942  for (i = 0; i < c->n_playlists; i++) {
1943  struct playlist *pls = c->playlists[i];
1944  char *url;
1945  ff_const59 AVInputFormat *in_fmt = NULL;
1946 
1947  if (!(pls->ctx = avformat_alloc_context())) {
1948  ret = AVERROR(ENOMEM);
1949  goto fail;
1950  }
1951 
1952  if (pls->n_segments == 0)
1953  continue;
1954 
1955  pls->index = i;
1956  pls->needed = 1;
1957  pls->parent = s;
1958 
1959  /*
1960  * If this is a live stream and this playlist looks like it is one segment
1961  * behind, try to sync it up so that every substream starts at the same
1962  * time position (so e.g. avformat_find_stream_info() will see packets from
1963  * all active streams within the first few seconds). This is not very generic,
1964  * though, as the sequence numbers are technically independent.
1965  */
1966  if (!pls->finished && pls->cur_seq_no == highest_cur_seq_no - 1 &&
1967  highest_cur_seq_no < pls->start_seq_no + pls->n_segments) {
1968  pls->cur_seq_no = highest_cur_seq_no;
1969  }
1970 
1972  if (!pls->read_buffer){
1973  ret = AVERROR(ENOMEM);
1974  avformat_free_context(pls->ctx);
1975  pls->ctx = NULL;
1976  goto fail;
1977  }
1978  ffio_init_context(&pls->pb, pls->read_buffer, INITIAL_BUFFER_SIZE, 0, pls,
1979  read_data, NULL, NULL);
1980  pls->ctx->probesize = s->probesize > 0 ? s->probesize : 1024 * 4;
1982  url = av_strdup(pls->segments[0]->url);
1983  ret = av_probe_input_buffer(&pls->pb, &in_fmt, url, NULL, 0, 0);
1984  av_free(url);
1985  if (ret < 0) {
1986  /* Free the ctx - it isn't initialized properly at this point,
1987  * so avformat_close_input shouldn't be called. If
1988  * avformat_open_input fails below, it frees and zeros the
1989  * context, so it doesn't need any special treatment like this. */
1990  av_log(s, AV_LOG_ERROR, "Error when loading first segment '%s'\n", pls->segments[0]->url);
1991  avformat_free_context(pls->ctx);
1992  pls->ctx = NULL;
1993  goto fail;
1994  }
1995  pls->ctx->pb = &pls->pb;
1996  pls->ctx->io_open = nested_io_open;
1997  pls->ctx->flags |= s->flags & ~AVFMT_FLAG_CUSTOM_IO;
1998 
1999  if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
2000  goto fail;
2001 
2002  ret = avformat_open_input(&pls->ctx, pls->segments[0]->url, in_fmt, NULL);
2003  if (ret < 0)
2004  goto fail;
2005 
2006  if (pls->id3_deferred_extra && pls->ctx->nb_streams == 1) {
2011  }
2012 
2013  if (pls->is_id3_timestamped == -1)
2014  av_log(s, AV_LOG_WARNING, "No expected HTTP requests have been made\n");
2015 
2016  /*
2017  * For ID3 timestamped raw audio streams we need to detect the packet
2018  * durations to calculate timestamps in fill_timing_for_id3_timestamped_stream(),
2019  * but for other streams we can rely on our user calling avformat_find_stream_info()
2020  * on us if they want to.
2021  */
2022  if (pls->is_id3_timestamped || (pls->n_renditions > 0 && pls->renditions[0]->type == AVMEDIA_TYPE_AUDIO)) {
2023  ret = avformat_find_stream_info(pls->ctx, NULL);
2024  if (ret < 0)
2025  goto fail;
2026  }
2027 
2028  pls->has_noheader_flag = !!(pls->ctx->ctx_flags & AVFMTCTX_NOHEADER);
2029 
2030  /* Create new AVStreams for each stream in this playlist */
2031  ret = update_streams_from_subdemuxer(s, pls);
2032  if (ret < 0)
2033  goto fail;
2034 
2035  /*
2036  * Copy any metadata from playlist to main streams, but do not set
2037  * event flags.
2038  */
2039  if (pls->n_main_streams)
2040  av_dict_copy(&pls->main_streams[0]->metadata, pls->ctx->metadata, 0);
2041 
2045  }
2046 
2048 
2049  return 0;
2050 fail:
2051  hls_close(s);
2052  return ret;
2053 }
2054 
2055 static int recheck_discard_flags(AVFormatContext *s, int first)
2056 {
2057  HLSContext *c = s->priv_data;
2058  int i, changed = 0;
2059  int cur_needed;
2060 
2061  /* Check if any new streams are needed */
2062  for (i = 0; i < c->n_playlists; i++) {
2063  struct playlist *pls = c->playlists[i];
2064 
2065  cur_needed = playlist_needed(c->playlists[i]);
2066 
2067  if (pls->broken) {
2068  continue;
2069  }
2070  if (cur_needed && !pls->needed) {
2071  pls->needed = 1;
2072  changed = 1;
2073  pls->cur_seq_no = select_cur_seq_no(c, pls);
2074  pls->pb.eof_reached = 0;
2075  if (c->cur_timestamp != AV_NOPTS_VALUE) {
2076  /* catch up */
2077  pls->seek_timestamp = c->cur_timestamp;
2078  pls->seek_flags = AVSEEK_FLAG_ANY;
2079  pls->seek_stream_index = -1;
2080  }
2081  av_log(s, AV_LOG_INFO, "Now receiving playlist %d, segment %d\n", i, pls->cur_seq_no);
2082  } else if (first && !cur_needed && pls->needed) {
2083  ff_format_io_close(pls->parent, &pls->input);
2084  pls->input_read_done = 0;
2085  ff_format_io_close(pls->parent, &pls->input_next);
2086  pls->input_next_requested = 0;
2087  pls->needed = 0;
2088  changed = 1;
2089  av_log(s, AV_LOG_INFO, "No longer receiving playlist %d\n", i);
2090  }
2091  }
2092  return changed;
2093 }
2094 
2096 {
2097  if (pls->id3_offset >= 0) {
2098  pls->pkt.dts = pls->id3_mpegts_timestamp +
2099  av_rescale_q(pls->id3_offset,
2100  pls->ctx->streams[pls->pkt.stream_index]->time_base,
2102  if (pls->pkt.duration)
2103  pls->id3_offset += pls->pkt.duration;
2104  else
2105  pls->id3_offset = -1;
2106  } else {
2107  /* there have been packets with unknown duration
2108  * since the last id3 tag, should not normally happen */
2109  pls->pkt.dts = AV_NOPTS_VALUE;
2110  }
2111 
2112  if (pls->pkt.duration)
2113  pls->pkt.duration = av_rescale_q(pls->pkt.duration,
2114  pls->ctx->streams[pls->pkt.stream_index]->time_base,
2116 
2117  pls->pkt.pts = AV_NOPTS_VALUE;
2118 }
2119 
2120 static AVRational get_timebase(struct playlist *pls)
2121 {
2122  if (pls->is_id3_timestamped)
2123  return MPEG_TIME_BASE_Q;
2124 
2125  return pls->ctx->streams[pls->pkt.stream_index]->time_base;
2126 }
2127 
2128 static int compare_ts_with_wrapdetect(int64_t ts_a, struct playlist *pls_a,
2129  int64_t ts_b, struct playlist *pls_b)
2130 {
2131  int64_t scaled_ts_a = av_rescale_q(ts_a, get_timebase(pls_a), MPEG_TIME_BASE_Q);
2132  int64_t scaled_ts_b = av_rescale_q(ts_b, get_timebase(pls_b), MPEG_TIME_BASE_Q);
2133 
2134  return av_compare_mod(scaled_ts_a, scaled_ts_b, 1LL << 33);
2135 }
2136 
2138 {
2139  HLSContext *c = s->priv_data;
2140  int ret, i, minplaylist = -1;
2141 
2143  c->first_packet = 0;
2144 
2145  for (i = 0; i < c->n_playlists; i++) {
2146  struct playlist *pls = c->playlists[i];
2147  /* Make sure we've got one buffered packet from each open playlist
2148  * stream */
2149  if (pls->needed && !pls->pkt.data) {
2150  while (1) {
2151  int64_t ts_diff;
2152  AVRational tb;
2153  ret = av_read_frame(pls->ctx, &pls->pkt);
2154  if (ret < 0) {
2155  if (!avio_feof(&pls->pb) && ret != AVERROR_EOF)
2156  return ret;
2157  reset_packet(&pls->pkt);
2158  break;
2159  } else {
2160  /* stream_index check prevents matching picture attachments etc. */
2161  if (pls->is_id3_timestamped && pls->pkt.stream_index == 0) {
2162  /* audio elementary streams are id3 timestamped */
2164  }
2165 
2166  if (c->first_timestamp == AV_NOPTS_VALUE &&
2167  pls->pkt.dts != AV_NOPTS_VALUE)
2168  c->first_timestamp = av_rescale_q(pls->pkt.dts,
2170  }
2171 
2172  if (pls->seek_timestamp == AV_NOPTS_VALUE)
2173  break;
2174 
2175  if (pls->seek_stream_index < 0 ||
2176  pls->seek_stream_index == pls->pkt.stream_index) {
2177 
2178  if (pls->pkt.dts == AV_NOPTS_VALUE) {
2180  break;
2181  }
2182 
2183  tb = get_timebase(pls);
2184  ts_diff = av_rescale_rnd(pls->pkt.dts, AV_TIME_BASE,
2185  tb.den, AV_ROUND_DOWN) -
2186  pls->seek_timestamp;
2187  if (ts_diff >= 0 && (pls->seek_flags & AVSEEK_FLAG_ANY ||
2188  pls->pkt.flags & AV_PKT_FLAG_KEY)) {
2190  break;
2191  }
2192  }
2193  av_packet_unref(&pls->pkt);
2194  }
2195  }
2196  /* Check if this stream has the packet with the lowest dts */
2197  if (pls->pkt.data) {
2198  struct playlist *minpls = minplaylist < 0 ?
2199  NULL : c->playlists[minplaylist];
2200  if (minplaylist < 0) {
2201  minplaylist = i;
2202  } else {
2203  int64_t dts = pls->pkt.dts;
2204  int64_t mindts = minpls->pkt.dts;
2205 
2206  if (dts == AV_NOPTS_VALUE ||
2207  (mindts != AV_NOPTS_VALUE && compare_ts_with_wrapdetect(dts, pls, mindts, minpls) < 0))
2208  minplaylist = i;
2209  }
2210  }
2211  }
2212 
2213  /* If we got a packet, return it */
2214  if (minplaylist >= 0) {
2215  struct playlist *pls = c->playlists[minplaylist];
2216  AVStream *ist;
2217  AVStream *st;
2218 
2219  ret = update_streams_from_subdemuxer(s, pls);
2220  if (ret < 0) {
2221  av_packet_unref(&pls->pkt);
2222  return ret;
2223  }
2224 
2225  // If sub-demuxer reports updated metadata, copy it to the first stream
2226  // and set its AVSTREAM_EVENT_FLAG_METADATA_UPDATED flag.
2228  if (pls->n_main_streams) {
2229  st = pls->main_streams[0];
2230  av_dict_copy(&st->metadata, pls->ctx->metadata, 0);
2232  }
2234  }
2235 
2236  /* check if noheader flag has been cleared by the subdemuxer */
2237  if (pls->has_noheader_flag && !(pls->ctx->ctx_flags & AVFMTCTX_NOHEADER)) {
2238  pls->has_noheader_flag = 0;
2240  }
2241 
2242  if (pls->pkt.stream_index >= pls->n_main_streams) {
2243  av_log(s, AV_LOG_ERROR, "stream index inconsistency: index %d, %d main streams, %d subdemuxer streams\n",
2244  pls->pkt.stream_index, pls->n_main_streams, pls->ctx->nb_streams);
2245  av_packet_unref(&pls->pkt);
2246  return AVERROR_BUG;
2247  }
2248 
2249  ist = pls->ctx->streams[pls->pkt.stream_index];
2250  st = pls->main_streams[pls->pkt.stream_index];
2251 
2252  av_packet_move_ref(pkt, &pls->pkt);
2253  pkt->stream_index = st->index;
2254 
2255  if (pkt->dts != AV_NOPTS_VALUE)
2256  c->cur_timestamp = av_rescale_q(pkt->dts,
2257  ist->time_base,
2258  AV_TIME_BASE_Q);
2259 
2260  /* There may be more situations where this would be useful, but this at least
2261  * handles newly probed codecs properly (i.e. request_probe by mpegts). */
2262  if (ist->codecpar->codec_id != st->codecpar->codec_id) {
2263  ret = set_stream_info_from_input_stream(st, pls, ist);
2264  if (ret < 0) {
2265  return ret;
2266  }
2267  }
2268 
2269  return 0;
2270  }
2271  return AVERROR_EOF;
2272 }
2273 
2274 static int hls_read_seek(AVFormatContext *s, int stream_index,
2275  int64_t timestamp, int flags)
2276 {
2277  HLSContext *c = s->priv_data;
2278  struct playlist *seek_pls = NULL;
2279  int i, seq_no;
2280  int j;
2281  int stream_subdemuxer_index;
2282  int64_t first_timestamp, seek_timestamp, duration;
2283 
2284  if ((flags & AVSEEK_FLAG_BYTE) || (c->ctx->ctx_flags & AVFMTCTX_UNSEEKABLE))
2285  return AVERROR(ENOSYS);
2286 
2287  first_timestamp = c->first_timestamp == AV_NOPTS_VALUE ?
2288  0 : c->first_timestamp;
2289 
2290  seek_timestamp = av_rescale_rnd(timestamp, AV_TIME_BASE,
2291  s->streams[stream_index]->time_base.den,
2292  flags & AVSEEK_FLAG_BACKWARD ?
2294 
2295  duration = s->duration == AV_NOPTS_VALUE ?
2296  0 : s->duration;
2297 
2298  if (0 < duration && duration < seek_timestamp - first_timestamp)
2299  return AVERROR(EIO);
2300 
2301  /* find the playlist with the specified stream */
2302  for (i = 0; i < c->n_playlists; i++) {
2303  struct playlist *pls = c->playlists[i];
2304  for (j = 0; j < pls->n_main_streams; j++) {
2305  if (pls->main_streams[j] == s->streams[stream_index]) {
2306  seek_pls = pls;
2307  stream_subdemuxer_index = j;
2308  break;
2309  }
2310  }
2311  }
2312  /* check if the timestamp is valid for the playlist with the
2313  * specified stream index */
2314  if (!seek_pls || !find_timestamp_in_playlist(c, seek_pls, seek_timestamp, &seq_no))
2315  return AVERROR(EIO);
2316 
2317  /* set segment now so we do not need to search again below */
2318  seek_pls->cur_seq_no = seq_no;
2319  seek_pls->seek_stream_index = stream_subdemuxer_index;
2320 
2321  for (i = 0; i < c->n_playlists; i++) {
2322  /* Reset reading */
2323  struct playlist *pls = c->playlists[i];
2324  ff_format_io_close(pls->parent, &pls->input);
2325  pls->input_read_done = 0;
2326  ff_format_io_close(pls->parent, &pls->input_next);
2327  pls->input_next_requested = 0;
2328  av_packet_unref(&pls->pkt);
2329  pls->pb.eof_reached = 0;
2330  /* Clear any buffered data */
2331  pls->pb.buf_end = pls->pb.buf_ptr = pls->pb.buffer;
2332  /* Reset the pos, to let the mpegts demuxer know we've seeked. */
2333  pls->pb.pos = 0;
2334  /* Flush the packet queue of the subdemuxer. */
2335  ff_read_frame_flush(pls->ctx);
2336 
2338  pls->seek_flags = flags;
2339 
2340  if (pls != seek_pls) {
2341  /* set closest segment seq_no for playlists not handled above */
2342  find_timestamp_in_playlist(c, pls, seek_timestamp, &pls->cur_seq_no);
2343  /* seek the playlist to the given position without taking
2344  * keyframes into account since this playlist does not have the
2345  * specified stream where we should look for the keyframes */
2346  pls->seek_stream_index = -1;
2347  pls->seek_flags |= AVSEEK_FLAG_ANY;
2348  }
2349  }
2350 
2352 
2353  return 0;
2354 }
2355 
2356 static int hls_probe(const AVProbeData *p)
2357 {
2358  /* Require #EXTM3U at the start, and either one of the ones below
2359  * somewhere for a proper match. */
2360  if (strncmp(p->buf, "#EXTM3U", 7))
2361  return 0;
2362 
2363  if (strstr(p->buf, "#EXT-X-STREAM-INF:") ||
2364  strstr(p->buf, "#EXT-X-TARGETDURATION:") ||
2365  strstr(p->buf, "#EXT-X-MEDIA-SEQUENCE:"))
2366  return AVPROBE_SCORE_MAX;
2367  return 0;
2368 }
2369 
2370 #define OFFSET(x) offsetof(HLSContext, x)
2371 #define FLAGS AV_OPT_FLAG_DECODING_PARAM
2372 static const AVOption hls_options[] = {
2373  {"live_start_index", "segment index to start live streams at (negative values are from the end)",
2374  OFFSET(live_start_index), AV_OPT_TYPE_INT, {.i64 = -3}, INT_MIN, INT_MAX, FLAGS},
2375  {"allowed_extensions", "List of file extensions that hls is allowed to access",
2376  OFFSET(allowed_extensions), AV_OPT_TYPE_STRING,
2377  {.str = "3gp,aac,avi,flac,mkv,m3u8,m4a,m4s,m4v,mpg,mov,mp2,mp3,mp4,mpeg,mpegts,ogg,ogv,oga,ts,vob,wav"},
2378  INT_MIN, INT_MAX, FLAGS},
2379  {"max_reload", "Maximum number of times a insufficient list is attempted to be reloaded",
2380  OFFSET(max_reload), AV_OPT_TYPE_INT, {.i64 = 3}, 0, INT_MAX, FLAGS},
2381  {"m3u8_hold_counters", "The maximum number of times to load m3u8 when it refreshes without new segments",
2382  OFFSET(m3u8_hold_counters), AV_OPT_TYPE_INT, {.i64 = 1000}, 0, INT_MAX, FLAGS},
2383  {"http_persistent", "Use persistent HTTP connections",
2384  OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS },
2385  {"http_multiple", "Use multiple HTTP connections for fetching segments",
2386  OFFSET(http_multiple), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, FLAGS},
2387  {"http_seekable", "Use HTTP partial requests, 0 = disable, 1 = enable, -1 = auto",
2388  OFFSET(http_seekable), AV_OPT_TYPE_BOOL, { .i64 = -1}, -1, 1, FLAGS},
2389  {NULL}
2390 };
2391 
2392 static const AVClass hls_class = {
2393  .class_name = "hls demuxer",
2394  .item_name = av_default_item_name,
2395  .option = hls_options,
2396  .version = LIBAVUTIL_VERSION_INT,
2397 };
2398 
2400  .name = "hls",
2401  .long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
2402  .priv_class = &hls_class,
2403  .priv_data_size = sizeof(HLSContext),
2405  .read_probe = hls_probe,
2408  .read_close = hls_close,
2410 };
#define FF_COMPLIANCE_EXPERIMENTAL
Allow nonstandardized experimental things.
Definition: avcodec.h:1594
#define AVSEEK_FLAG_BACKWARD
Definition: avformat.h:2512
int64_t probesize
Maximum size of the data read from input for determining the input container format.
Definition: avformat.h:1517
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:134
#define NULL
Definition: coverity.c:32
int ff_id3v2_parse_priv(AVFormatContext *s, ID3v2ExtraMeta *extra_meta)
Add metadata for all PRIV tags in the ID3v2 header.
Definition: id3v2.c:1271
static int update_init_section(struct playlist *pls, struct segment *seg)
Definition: hls.c:1318
int needed
Definition: hls.c:118
int m3u8_hold_counters
Definition: hls.c:122
struct segment * init_section
Definition: hls.c:77
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:334
int bandwidth
Definition: hls.c:181
static int read_from_url(struct playlist *pls, struct segment *seg, uint8_t *buf, int buf_size)
Definition: hls.c:1017
#define AVSTREAM_EVENT_FLAG_METADATA_UPDATED
The call resulted in updated metadata.
Definition: avformat.h:990
Definition: hls.c:93
ID3v2ExtraMetaPRIV priv
Definition: id3v2.h:91
char assoc_language[MAX_FIELD_LEN]
Definition: hls.c:467
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1629
union ID3v2ExtraMeta::@255 data
AVDictionary * id3_initial
Definition: hls.c:143
AVOption.
Definition: opt.h:246
static int set_stream_info_from_input_stream(AVStream *st, struct playlist *pls, AVStream *ist)
Definition: hls.c:1767
struct segment ** init_sections
Definition: hls.c:162
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:450
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
unsigned int id3_buf_size
Definition: hls.c:142
ID3v2ExtraMeta * id3_deferred_extra
Definition: hls.c:146
#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:4948
int ff_copy_whiteblacklists(AVFormatContext *dst, const AVFormatContext *src)
Copies the whilelists from one context to the other.
Definition: utils.c:159
#define AVSEEK_FLAG_ANY
seek to any frame, even non-keyframes
Definition: avformat.h:2514
int event_flags
Flags for the user to detect events happening on the stream.
Definition: avformat.h:989
char forced[4]
Definition: hls.c:470
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:474
static int64_t default_reload_interval(struct playlist *pls)
Definition: hls.c:1375
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
int disposition
Definition: hls.c:177
unsigned int init_sec_data_len
Definition: hls.c:130
int num
Numerator.
Definition: rational.h:59
int index
stream index in AVFormatContext
Definition: avformat.h:877
int size
Definition: packet.h:356
#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:241
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
#define AVIO_FLAG_READ
read-only
Definition: avio.h:674
char language[MAX_FIELD_LEN]
Definition: hls.c:466
unsigned char * buffer
Start of the buffer.
Definition: avio.h:226
int av_strncasecmp(const char *a, const char *b, size_t n)
Locale-independent case-insensitive compare.
Definition: avstring.c:223
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:834
int avformat_open_input(AVFormatContext **ps, const char *url, ff_const59 AVInputFormat *fmt, AVDictionary **options)
Open an input stream and read the header.
Definition: utils.c:536
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:236
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:558
#define MAX_CHARACTERISTICS_LEN
Definition: hls.c:45
int broken
Definition: hls.c:119
int av_probe_input_buffer(AVIOContext *pb, ff_const59 AVInputFormat **fmt, const char *url, void *logctx, unsigned int offset, unsigned int max_probe_size)
Like av_probe_input_buffer2() but returns 0 on success.
Definition: format.c:314
int ctx_flags
Flags signalling stream properties.
Definition: avformat.h:1400
static void reset_packet(AVPacket *pkt)
Definition: hls.c:301
int http_seekable
Definition: hls.c:214
int strict_std_compliance
Allow non-standard and experimental extension.
Definition: avformat.h:1659
char * url
Definition: hls.c:72
uint8_t base
Definition: vp3data.h:202
int64_t url_offset
Definition: hls.c:70
static int id3_has_changed_values(struct playlist *pls, AVDictionary *metadata, ID3v2ExtraMetaAPIC *apic)
Definition: hls.c:1060
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:382
void ff_read_frame_flush(AVFormatContext *s)
Flush the frame reader.
Definition: utils.c:1931
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
unsigned int init_sec_buf_read_offset
Definition: hls.c:131
Public dictionary API.
char type[16]
Definition: hls.c:463
int n_renditions
Definition: hls.c:199
#define ID3v2_HEADER_SIZE
Definition: id3v2.h:30
int last_seq_no
Definition: hls.c:121
#define MPEG_TIME_BASE_Q
Definition: hls.c:48
enum AVMediaType type
Definition: hls.c:172
uint8_t iv[16]
Definition: hls.c:75
char defaultr[4]
Definition: hls.c:469
uint8_t
Round toward +infinity.
Definition: mathematics.h:83
int http_multiple
Definition: hls.c:213
int n_variants
Definition: hls.c:195
#define FLAGS
Definition: hls.c:2371
#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:465
int64_t cur_seg_offset
Definition: hls.c:123
char audio[MAX_FIELD_LEN]
Definition: hls.c:331
static void free_rendition_list(HLSContext *c)
Definition: hls.c:288
#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: packet.h:373
static struct segment * next_segment(struct playlist *pls)
Definition: hls.c:1009
int id
Format-specific stream ID.
Definition: avformat.h:883
uint8_t * read_buffer
Definition: hls.c:96
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5695
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:1131
static struct playlist * new_playlist(HLSContext *c, const char *url, const char *base)
Definition: hls.c:307
AVInputFormat ff_hls_demuxer
Definition: hls.c:2399
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4526
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:1089
int n_playlists
Definition: hls.c:197
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: packet.h:355
AVProgram * av_new_program(AVFormatContext *s, int id)
Definition: utils.c:4625
void av_packet_move_ref(AVPacket *dst, AVPacket *src)
Move every field in src to dst and reset src.
Definition: avpacket.c:663
static int read_data(void *opaque, uint8_t *buf, int buf_size)
Definition: hls.c:1428
#define AVERROR_EOF
End of file.
Definition: error.h:55
unsigned int init_sec_buf_size
Definition: hls.c:129
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:157
int ff_http_do_new_request2(URLContext *h, const char *uri, AVDictionary **opts)
Send a new HTTP request, reusing the old connection.
Definition: http.c:337
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:1612
unsigned int * stream_index
Definition: avformat.h:1272
#define av_log(a,...)
static void free_playlist_list(HLSContext *c)
Definition: hls.c:247
struct rendition ** renditions
Definition: hls.c:200
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:625
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:388
struct variant ** variants
Definition: hls.c:196
static void free_segment_dynarray(struct segment **segments, int n_segments)
Definition: hls.c:218
static AVRational get_timebase(struct playlist *pls)
Definition: hls.c:2120
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
Callback for checking whether to abort blocking functions.
Definition: avio.h:58
#define ff_const59
The ff_const59 define is not part of the public API and will be removed without further warning...
Definition: avformat.h:544
AVIOContext * playlist_pb
Definition: hls.c:215
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
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:2128
#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:188
int64_t cur_timestamp
Definition: hls.c:207
int n_renditions
Definition: hls.c:156
static const AVClass hls_class
Definition: hls.c:2392
AVIOInterruptCB * interrupt_callback
Definition: hls.c:208
char bandwidth[20]
Definition: hls.c:329
#define AVFMT_TS_DISCONT
Format allows timestamp discontinuities.
Definition: avformat.h:464
static void handle_key_args(struct key_info *info, const char *key, int key_len, char **dest, int *dest_len)
Definition: hls.c:386
#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
unsigned int pos
Definition: spdifenc.c:412
#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:403
int64_t id3_mpegts_timestamp
Definition: hls.c:139
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:228
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1124
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:1786
int first_packet
Definition: hls.c:205
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:237
static int find_timestamp_in_playlist(HLSContext *c, struct playlist *pls, int64_t timestamp, int *seq_no)
Definition: hls.c:1644
uint8_t * data
Definition: id3v2.h:74
int64_t id3_offset
Definition: hls.c:140
int is_id3_timestamped
Definition: hls.c:138
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:123
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:361
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:502
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:443
int live_start_index
Definition: hls.c:204
Definition: hls.c:68
#define AV_DISPOSITION_FORCED
Track should be used during playback by default.
Definition: avformat.h:833
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:174
static struct segment * current_segment(struct playlist *pls)
Definition: hls.c:1004
const char * name
Definition: qsvenc.c:46
int n_main_streams
Definition: hls.c:110
#define dynarray_add(tab, nb_ptr, elem)
Definition: internal.h:197
static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **opts)
Definition: hls.c:1731
#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:355
#define AV_OPT_SEARCH_CHILDREN
Search in possible children of the given object first.
Definition: opt.h:558
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that&#39;s been allocated with av_malloc() or another memory allocation functio...
Definition: dict.h:76
char * allowed_extensions
Definition: hls.c:210
static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url, AVDictionary **opts, AVDictionary *opts2, int *is_http_out)
Definition: hls.c:630
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:1588
uint8_t * init_sec_buf
Definition: hls.c:128
#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:2137
uint8_t * id3_buf
Definition: hls.c:141
#define AVFMT_EVENT_FLAG_METADATA_UPDATED
The call resulted in updated metadata.
Definition: avformat.h:1667
Definition: hls.c:380
#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:406
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:478
int 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:319
AVDictionary * metadata
Definition: avformat.h:940
static struct variant * new_variant(HLSContext *c, struct variant_info *info, const char *url, const char *base)
Definition: hls.c:336
#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:2095
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:73
int input_read_done
Definition: hls.c:98
int64_t max_analyze_duration
Maximum duration (in AV_TIME_BASE units) of the data read from input in avformat_find_stream_info().
Definition: avformat.h:1525
char subtitles_group[MAX_FIELD_LEN]
Definition: hls.c:189
char name[MAX_FIELD_LEN]
Definition: hls.c:468
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:545
#define AV_DISPOSITION_VISUAL_IMPAIRED
stream for visual impaired audiences
Definition: avformat.h:835
int64_t size
Definition: hls.c:71
enum KeyType key_type
Definition: hls.c:74
Stream structure.
Definition: avformat.h:876
int id3_changed
Definition: hls.c:145
#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:478
AVFormatContext * parent
Definition: hls.c:101
AVFormatContext * ctx
Definition: hls.c:194
static void parse_id3(AVFormatContext *s, AVIOContext *pb, AVDictionary **metadata, int64_t *dts, ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta **extra_meta)
Definition: hls.c:1034
#define AV_DISPOSITION_DEFAULT
Definition: avformat.h:821
int64_t first_timestamp
Definition: hls.c:206
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:253
char subtitles[MAX_FIELD_LEN]
Definition: hls.c:333
AVStreamInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1231
struct ID3v2ExtraMeta * next
Definition: id3v2.h:86
int ff_check_interrupt(AVIOInterruptCB *cb)
Check if the user has requested to interrupt a blocking function associated with cb.
Definition: avio.c:666
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:715
int n_init_sections
Definition: hls.c:161
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:605
uint8_t * data
The data buffer.
Definition: buffer.h:89
#define AVFMT_NOGENSEARCH
Format does not allow to fall back on generic search.
Definition: avformat.h:469
static const AVOption hls_options[]
Definition: hls.c:2372
static int hls_read_header(AVFormatContext *s)
Definition: hls.c:1846
Definition: url.h:38
ID3v2ExtraMetaAPIC apic
Definition: id3v2.h:88
int max_reload
Definition: hls.c:211
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:1140
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:198
#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:1231
int64_t last_load_time
Definition: hls.c:124
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
int ff_id3v2_parse_priv_dict(AVDictionary **metadata, ID3v2ExtraMeta *extra_meta)
Parse PRIV tags into a dictionary.
Definition: id3v2.c:1231
static void update_noheader_flag(AVFormatContext *s)
Definition: hls.c:1811
#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:127
int seek_stream_index
Definition: hls.c:150
PlaylistType
Definition: hls.c:82
int64_t target_duration
Definition: hls.c:114
static int save_avio_options(AVFormatContext *s)
Definition: hls.c:1709
#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:573
#define AVSEEK_FLAG_BYTE
seeking based on position in bytes
Definition: avformat.h:2513
int need_context_update
Whether the internal avctx needs to be updated from codecpar (after a late change to codecpar) ...
Definition: internal.h:189
cl_device_type type
char uri[MAX_URL_SIZE]
Definition: hls.c:464
AVMediaType
Definition: avutil.h:199
int n_playlists
Definition: hls.c:184
struct playlist * playlist
Definition: hls.c:173
static void add_stream_to_programs(AVFormatContext *s, struct playlist *pls, AVStream *stream)
Definition: hls.c:1741
#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:4455
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
int ff_hex_to_data(uint8_t *data, const char *p)
Parse a string of hexadecimal strings.
Definition: utils.c:4920
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1780
Definition: hls.c:171
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:362
const char * avio_find_protocol_name(const char *url)
Return the name of the protocol that will handle the passed URL.
Definition: avio.c:475
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:971
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:187
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:565
KeyType
Definition: hls.c:62
static int recheck_discard_flags(AVFormatContext *s, int first)
Definition: hls.c:2055
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:4978
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
int64_t seek_timestamp
Definition: hls.c:148
char iv[35]
Definition: hls.c:383
#define OFFSET(x)
Definition: hls.c:2370
char characteristics[MAX_CHARACTERISTICS_LEN]
Definition: hls.c:471
int seek_flags
Definition: hls.c:149
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:453
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:175
AVIOContext pb
Definition: hls.c:95
Main libavformat public API header.
char uri[MAX_URL_SIZE]
Definition: hls.c:381
const OptionDef options[]
Definition: ffmpeg_opt.c:3388
#define INITIAL_BUFFER_SIZE
Definition: hls.c:42
int ff_id3v2_match(const uint8_t *buf, const char *magic)
Detect ID3v2 Header.
Definition: id3v2.c:143
int ffio_init_context(AVIOContext *s, unsigned char *buffer, int buffer_size, int write_flag, void *opaque, int(*read_packet)(void *opaque, uint8_t *buf, int buf_size), int(*write_packet)(void *opaque, uint8_t *buf, int buf_size), int64_t(*seek)(void *opaque, int64_t offset, int whence))
Definition: aviobuf.c:76
#define MAX_FIELD_LEN
Definition: hls.c:44
static int playlist_needed(struct playlist *pls)
Definition: hls.c:1382
int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
Read packets of a media file to get stream information.
Definition: utils.c:3622
const char * tag
Definition: id3v2.h:85
static double c[64]
int cur_seq_no
Definition: hls.c:202
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:929
static int open_url_keepalive(AVFormatContext *s, AVIOContext **pb, const char *url, AVDictionary **options)
Definition: hls.c:612
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:1068
AVDictionary * avio_opts
Definition: hls.c:209
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:35
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:4498
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:215
int http_persistent
Definition: hls.c:212
static int ensure_playlist(HLSContext *c, struct playlist **pls, const char *url)
Definition: hls.c:602
static int hls_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: hls.c:2274
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:779
#define av_free(p)
int id3_found
Definition: hls.c:144
char name[MAX_FIELD_LEN]
Definition: hls.c:176
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:1112
char * value
Definition: dict.h:87
int eof_reached
true if was unable to read due to error or eof
Definition: avio.h:239
int len
int ff_id3v2_tag_len(const uint8_t *buf)
Get the length of an ID3v2 tag.
Definition: id3v2.c:156
void * priv_data
Format private data.
Definition: avformat.h:1379
static int hls_probe(const AVProbeData *p)
Definition: hls.c:2356
AVBufferRef * buf
Definition: id3v2.h:66
AVFormatContext * ctx
Definition: hls.c:103
uint32_t datasize
Definition: id3v2.h:75
struct playlist ** playlists
Definition: hls.c:185
Definition: hls.c:180
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: packet.h:354
char video[MAX_FIELD_LEN]
Definition: hls.c:332
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:650
#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
int m3u8_hold_counters
Definition: hls.c:203
char uri[MAX_URL_SIZE]
Definition: hls.c:402
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1023
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:356
#define FFSWAP(type, a, b)
Definition: common.h:99
int start_seq_no
Definition: hls.c:115
int stream_index
Definition: packet.h:357
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:905
static void free_init_section_list(struct playlist *pls)
Definition: hls.c:235
int64_t duration
Definition: hls.c:69
static void free_variant_list(HLSContext *c)
Definition: hls.c:276
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:803
int cur_seq_no
Definition: hls.c:120
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
Definition: utils.c:2115
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:931
char key_url[MAX_URL_SIZE]
Definition: hls.c:133
static int hls_close(AVFormatContext *s)
Definition: hls.c:1832
char * ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase)
Definition: utils.c:4899
This structure stores compressed data.
Definition: packet.h:332
Definition: hls.c:63
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:348
AVPacket attached_pic
For streams with AV_DISPOSITION_ATTACHED_PIC disposition, this packet will contain the attached pictu...
Definition: avformat.h:958
#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:1670
static uint8_t tmp[11]
Definition: aes_ctr.c:26