FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
hls.c
Go to the documentation of this file.
1 /*
2  * Apple HTTP Live Streaming demuxer
3  * Copyright (c) 2010 Martin Storsjo
4  * Copyright (c) 2013 Anssi Hannula
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 /**
24  * @file
25  * Apple HTTP Live Streaming demuxer
26  * http://tools.ietf.org/html/draft-pantos-http-live-streaming
27  */
28 
29 #include "libavformat/http.h"
30 #include "libavutil/avstring.h"
31 #include "libavutil/avassert.h"
32 #include "libavutil/intreadwrite.h"
33 #include "libavutil/mathematics.h"
34 #include "libavutil/opt.h"
35 #include "libavutil/dict.h"
36 #include "libavutil/time.h"
37 #include "avformat.h"
38 #include "internal.h"
39 #include "avio_internal.h"
40 #include "id3v2.h"
41 
42 #define INITIAL_BUFFER_SIZE 32768
43 
44 #define MAX_FIELD_LEN 64
45 #define MAX_CHARACTERISTICS_LEN 512
46 
47 #define MPEG_TIME_BASE 90000
48 #define MPEG_TIME_BASE_Q (AVRational){1, MPEG_TIME_BASE}
49 
50 /*
51  * An apple http stream consists of a playlist with media segment files,
52  * played sequentially. There may be several playlists with the same
53  * video content, in different bandwidth variants, that are played in
54  * parallel (preferably only one bandwidth variant at a time). In this case,
55  * the user supplied the url to a main playlist that only lists the variant
56  * playlists.
57  *
58  * If the main playlist doesn't point at any variants, we still create
59  * one anonymous toplevel variant for this, to maintain the structure.
60  */
61 
62 enum KeyType {
66 };
67 
68 struct segment {
69  int64_t duration;
70  int64_t url_offset;
71  int64_t size;
72  char *url;
73  char *key;
75  uint8_t iv[16];
76  /* associated Media Initialization Section, treated as a segment */
78 };
79 
80 struct rendition;
81 
86 };
87 
88 /*
89  * Each playlist has its own demuxer. If it currently is active,
90  * it has an open AVIOContext too, and potentially an AVPacket
91  * containing the next packet from this stream.
92  */
93 struct playlist {
102  int index;
106 
107  /* main demuxer streams associated with this playlist
108  * indexed by the subdemuxer stream indexes */
111 
112  int finished;
117  struct segment **segments;
118  int needed;
120  int64_t cur_seg_offset;
121  int64_t last_load_time;
122 
123  /* Currently active Media Initialization Section */
126  unsigned int init_sec_buf_size;
127  unsigned int init_sec_data_len;
129 
132 
133  /* ID3 timestamp handling (elementary audio streams have ID3 timestamps
134  * (and possibly other ID3 tags) in the beginning of each segment) */
135  int is_id3_timestamped; /* -1: not yet known */
136  int64_t id3_mpegts_timestamp; /* in mpegts tb */
137  int64_t id3_offset; /* in stream original tb */
138  uint8_t* id3_buf; /* temp buffer for id3 parsing */
139  unsigned int id3_buf_size;
140  AVDictionary *id3_initial; /* data from first id3 tag */
141  int id3_found; /* ID3 tag found at some point */
142  int id3_changed; /* ID3 tag data has changed at some point */
143  ID3v2ExtraMeta *id3_deferred_extra; /* stored here until subdemuxer is opened */
144 
145  int64_t seek_timestamp;
147  int seek_stream_index; /* into subdemuxer stream array */
148 
149  /* Renditions associated with this playlist, if any.
150  * Alternative rendition playlists have a single rendition associated
151  * with them, and variant main Media Playlists may have
152  * multiple (playlist-less) renditions associated with them. */
155 
156  /* Media Initialization Sections (EXT-X-MAP) associated with this
157  * playlist, if any. */
160 };
161 
162 /*
163  * Renditions are e.g. alternative subtitle or audio streams.
164  * The rendition may either be an external playlist or it may be
165  * contained in the main Media Playlist of the variant (in which case
166  * playlist is NULL).
167  */
168 struct rendition {
175 };
176 
177 struct variant {
179 
180  /* every variant contains at least the main Media Playlist in index 0 */
182  struct playlist **playlists;
183 
187 };
188 
189 typedef struct HLSContext {
190  AVClass *class;
193  struct variant **variants;
195  struct playlist **playlists;
198 
203  int64_t cur_timestamp;
212 } HLSContext;
213 
214 static void free_segment_dynarray(struct segment **segments, int n_segments)
215 {
216  int i;
217  for (i = 0; i < n_segments; i++) {
218  av_freep(&segments[i]->key);
219  av_freep(&segments[i]->url);
220  av_freep(&segments[i]);
221  }
222 }
223 
224 static void free_segment_list(struct playlist *pls)
225 {
227  av_freep(&pls->segments);
228  pls->n_segments = 0;
229 }
230 
231 static void free_init_section_list(struct playlist *pls)
232 {
233  int i;
234  for (i = 0; i < pls->n_init_sections; i++) {
235  av_freep(&pls->init_sections[i]->url);
236  av_freep(&pls->init_sections[i]);
237  }
238  av_freep(&pls->init_sections);
239  pls->n_init_sections = 0;
240 }
241 
243 {
244  int i;
245  for (i = 0; i < c->n_playlists; i++) {
246  struct playlist *pls = c->playlists[i];
247  free_segment_list(pls);
249  av_freep(&pls->main_streams);
250  av_freep(&pls->renditions);
251  av_freep(&pls->id3_buf);
252  av_dict_free(&pls->id3_initial);
254  av_freep(&pls->init_sec_buf);
255  av_packet_unref(&pls->pkt);
256  av_freep(&pls->pb.buffer);
257  if (pls->input)
258  ff_format_io_close(c->ctx, &pls->input);
259  pls->input_read_done = 0;
260  if (pls->input_next)
261  ff_format_io_close(c->ctx, &pls->input_next);
262  pls->input_next_requested = 0;
263  if (pls->ctx) {
264  pls->ctx->pb = NULL;
265  avformat_close_input(&pls->ctx);
266  }
267  av_free(pls);
268  }
269  av_freep(&c->playlists);
270  c->n_playlists = 0;
271 }
272 
274 {
275  int i;
276  for (i = 0; i < c->n_variants; i++) {
277  struct variant *var = c->variants[i];
278  av_freep(&var->playlists);
279  av_free(var);
280  }
281  av_freep(&c->variants);
282  c->n_variants = 0;
283 }
284 
286 {
287  int i;
288  for (i = 0; i < c->n_renditions; i++)
289  av_freep(&c->renditions[i]);
290  av_freep(&c->renditions);
291  c->n_renditions = 0;
292 }
293 
294 /*
295  * Used to reset a statically allocated AVPacket to a clean slate,
296  * containing no data.
297  */
298 static void reset_packet(AVPacket *pkt)
299 {
300  av_init_packet(pkt);
301  pkt->data = NULL;
302 }
303 
304 static struct playlist *new_playlist(HLSContext *c, const char *url,
305  const char *base)
306 {
307  struct playlist *pls = av_mallocz(sizeof(struct playlist));
308  if (!pls)
309  return NULL;
310  reset_packet(&pls->pkt);
311  ff_make_absolute_url(pls->url, sizeof(pls->url), base, url);
313 
314  pls->is_id3_timestamped = -1;
316 
317  dynarray_add(&c->playlists, &c->n_playlists, pls);
318  return pls;
319 }
320 
321 struct variant_info {
322  char bandwidth[20];
323  /* variant group ids: */
327 };
328 
329 static struct variant *new_variant(HLSContext *c, struct variant_info *info,
330  const char *url, const char *base)
331 {
332  struct variant *var;
333  struct playlist *pls;
334 
335  pls = new_playlist(c, url, base);
336  if (!pls)
337  return NULL;
338 
339  var = av_mallocz(sizeof(struct variant));
340  if (!var)
341  return NULL;
342 
343  if (info) {
344  var->bandwidth = atoi(info->bandwidth);
345  strcpy(var->audio_group, info->audio);
346  strcpy(var->video_group, info->video);
347  strcpy(var->subtitles_group, info->subtitles);
348  }
349 
350  dynarray_add(&c->variants, &c->n_variants, var);
351  dynarray_add(&var->playlists, &var->n_playlists, pls);
352  return var;
353 }
354 
355 static void handle_variant_args(struct variant_info *info, const char *key,
356  int key_len, char **dest, int *dest_len)
357 {
358  if (!strncmp(key, "BANDWIDTH=", key_len)) {
359  *dest = info->bandwidth;
360  *dest_len = sizeof(info->bandwidth);
361  } else if (!strncmp(key, "AUDIO=", key_len)) {
362  *dest = info->audio;
363  *dest_len = sizeof(info->audio);
364  } else if (!strncmp(key, "VIDEO=", key_len)) {
365  *dest = info->video;
366  *dest_len = sizeof(info->video);
367  } else if (!strncmp(key, "SUBTITLES=", key_len)) {
368  *dest = info->subtitles;
369  *dest_len = sizeof(info->subtitles);
370  }
371 }
372 
373 struct key_info {
375  char method[11];
376  char iv[35];
377 };
378 
379 static void handle_key_args(struct key_info *info, const char *key,
380  int key_len, char **dest, int *dest_len)
381 {
382  if (!strncmp(key, "METHOD=", key_len)) {
383  *dest = info->method;
384  *dest_len = sizeof(info->method);
385  } else if (!strncmp(key, "URI=", key_len)) {
386  *dest = info->uri;
387  *dest_len = sizeof(info->uri);
388  } else if (!strncmp(key, "IV=", key_len)) {
389  *dest = info->iv;
390  *dest_len = sizeof(info->iv);
391  }
392 }
393 
396  char byterange[32];
397 };
398 
399 static struct segment *new_init_section(struct playlist *pls,
400  struct init_section_info *info,
401  const char *url_base)
402 {
403  struct segment *sec;
404  char *ptr;
405  char tmp_str[MAX_URL_SIZE];
406 
407  if (!info->uri[0])
408  return NULL;
409 
410  sec = av_mallocz(sizeof(*sec));
411  if (!sec)
412  return NULL;
413 
414  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url_base, info->uri);
415  sec->url = av_strdup(tmp_str);
416  if (!sec->url) {
417  av_free(sec);
418  return NULL;
419  }
420 
421  if (info->byterange[0]) {
422  sec->size = strtoll(info->byterange, NULL, 10);
423  ptr = strchr(info->byterange, '@');
424  if (ptr)
425  sec->url_offset = strtoll(ptr+1, NULL, 10);
426  } else {
427  /* the entire file is the init section */
428  sec->size = -1;
429  }
430 
431  dynarray_add(&pls->init_sections, &pls->n_init_sections, sec);
432 
433  return sec;
434 }
435 
436 static void handle_init_section_args(struct init_section_info *info, const char *key,
437  int key_len, char **dest, int *dest_len)
438 {
439  if (!strncmp(key, "URI=", key_len)) {
440  *dest = info->uri;
441  *dest_len = sizeof(info->uri);
442  } else if (!strncmp(key, "BYTERANGE=", key_len)) {
443  *dest = info->byterange;
444  *dest_len = sizeof(info->byterange);
445  }
446 }
447 
449  char type[16];
455  char defaultr[4];
456  char forced[4];
458 };
459 
460 static struct rendition *new_rendition(HLSContext *c, struct rendition_info *info,
461  const char *url_base)
462 {
463  struct rendition *rend;
465  char *characteristic;
466  char *chr_ptr;
467  char *saveptr;
468 
469  if (!strcmp(info->type, "AUDIO"))
470  type = AVMEDIA_TYPE_AUDIO;
471  else if (!strcmp(info->type, "VIDEO"))
472  type = AVMEDIA_TYPE_VIDEO;
473  else if (!strcmp(info->type, "SUBTITLES"))
474  type = AVMEDIA_TYPE_SUBTITLE;
475  else if (!strcmp(info->type, "CLOSED-CAPTIONS"))
476  /* CLOSED-CAPTIONS is ignored since we do not support CEA-608 CC in
477  * AVC SEI RBSP anyway */
478  return NULL;
479 
480  if (type == AVMEDIA_TYPE_UNKNOWN)
481  return NULL;
482 
483  /* URI is mandatory for subtitles as per spec */
484  if (type == AVMEDIA_TYPE_SUBTITLE && !info->uri[0])
485  return NULL;
486 
487  /* TODO: handle subtitles (each segment has to parsed separately) */
489  if (type == AVMEDIA_TYPE_SUBTITLE)
490  return NULL;
491 
492  rend = av_mallocz(sizeof(struct rendition));
493  if (!rend)
494  return NULL;
495 
496  dynarray_add(&c->renditions, &c->n_renditions, rend);
497 
498  rend->type = type;
499  strcpy(rend->group_id, info->group_id);
500  strcpy(rend->language, info->language);
501  strcpy(rend->name, info->name);
502 
503  /* add the playlist if this is an external rendition */
504  if (info->uri[0]) {
505  rend->playlist = new_playlist(c, info->uri, url_base);
506  if (rend->playlist)
508  &rend->playlist->n_renditions, rend);
509  }
510 
511  if (info->assoc_language[0]) {
512  int langlen = strlen(rend->language);
513  if (langlen < sizeof(rend->language) - 3) {
514  rend->language[langlen] = ',';
515  strncpy(rend->language + langlen + 1, info->assoc_language,
516  sizeof(rend->language) - langlen - 2);
517  }
518  }
519 
520  if (!strcmp(info->defaultr, "YES"))
522  if (!strcmp(info->forced, "YES"))
524 
525  chr_ptr = info->characteristics;
526  while ((characteristic = av_strtok(chr_ptr, ",", &saveptr))) {
527  if (!strcmp(characteristic, "public.accessibility.describes-music-and-sound"))
529  else if (!strcmp(characteristic, "public.accessibility.describes-video"))
531 
532  chr_ptr = NULL;
533  }
534 
535  return rend;
536 }
537 
538 static void handle_rendition_args(struct rendition_info *info, const char *key,
539  int key_len, char **dest, int *dest_len)
540 {
541  if (!strncmp(key, "TYPE=", key_len)) {
542  *dest = info->type;
543  *dest_len = sizeof(info->type);
544  } else if (!strncmp(key, "URI=", key_len)) {
545  *dest = info->uri;
546  *dest_len = sizeof(info->uri);
547  } else if (!strncmp(key, "GROUP-ID=", key_len)) {
548  *dest = info->group_id;
549  *dest_len = sizeof(info->group_id);
550  } else if (!strncmp(key, "LANGUAGE=", key_len)) {
551  *dest = info->language;
552  *dest_len = sizeof(info->language);
553  } else if (!strncmp(key, "ASSOC-LANGUAGE=", key_len)) {
554  *dest = info->assoc_language;
555  *dest_len = sizeof(info->assoc_language);
556  } else if (!strncmp(key, "NAME=", key_len)) {
557  *dest = info->name;
558  *dest_len = sizeof(info->name);
559  } else if (!strncmp(key, "DEFAULT=", key_len)) {
560  *dest = info->defaultr;
561  *dest_len = sizeof(info->defaultr);
562  } else if (!strncmp(key, "FORCED=", key_len)) {
563  *dest = info->forced;
564  *dest_len = sizeof(info->forced);
565  } else if (!strncmp(key, "CHARACTERISTICS=", key_len)) {
566  *dest = info->characteristics;
567  *dest_len = sizeof(info->characteristics);
568  }
569  /*
570  * ignored:
571  * - AUTOSELECT: client may autoselect based on e.g. system language
572  * - INSTREAM-ID: EIA-608 closed caption number ("CC1".."CC4")
573  */
574 }
575 
576 /* used by parse_playlist to allocate a new variant+playlist when the
577  * playlist is detected to be a Media Playlist (not Master Playlist)
578  * and we have no parent Master Playlist (parsing of which would have
579  * allocated the variant and playlist already)
580  * *pls == NULL => Master Playlist or parentless Media Playlist
581  * *pls != NULL => parented Media Playlist, playlist+variant allocated */
582 static int ensure_playlist(HLSContext *c, struct playlist **pls, const char *url)
583 {
584  if (*pls)
585  return 0;
586  if (!new_variant(c, NULL, url, NULL))
587  return AVERROR(ENOMEM);
588  *pls = c->playlists[c->n_playlists - 1];
589  return 0;
590 }
591 
593  const char *url)
594 {
595 #if !CONFIG_HTTP_PROTOCOL
597 #else
598  int ret;
599  URLContext *uc = ffio_geturlcontext(*pb);
600  av_assert0(uc);
601  (*pb)->eof_reached = 0;
602  ret = ff_http_do_new_request(uc, url);
603  if (ret < 0) {
604  ff_format_io_close(s, pb);
605  }
606  return ret;
607 #endif
608 }
609 
610 static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url,
611  AVDictionary *opts, AVDictionary *opts2, int *is_http_out)
612 {
613  HLSContext *c = s->priv_data;
614  AVDictionary *tmp = NULL;
615  const char *proto_name = NULL;
616  int ret;
617  int is_http = 0;
618 
619  av_dict_copy(&tmp, opts, 0);
620  av_dict_copy(&tmp, opts2, 0);
621 
622  if (av_strstart(url, "crypto", NULL)) {
623  if (url[6] == '+' || url[6] == ':')
624  proto_name = avio_find_protocol_name(url + 7);
625  }
626 
627  if (!proto_name)
628  proto_name = avio_find_protocol_name(url);
629 
630  if (!proto_name)
631  return AVERROR_INVALIDDATA;
632 
633  // only http(s) & file are allowed
634  if (av_strstart(proto_name, "file", NULL)) {
635  if (strcmp(c->allowed_extensions, "ALL") && !av_match_ext(url, c->allowed_extensions)) {
636  av_log(s, AV_LOG_ERROR,
637  "Filename extension of \'%s\' is not a common multimedia extension, blocked for security reasons.\n"
638  "If you wish to override this adjust allowed_extensions, you can set it to \'ALL\' to allow all\n",
639  url);
640  return AVERROR_INVALIDDATA;
641  }
642  } else if (av_strstart(proto_name, "http", NULL)) {
643  is_http = 1;
644  } else
645  return AVERROR_INVALIDDATA;
646 
647  if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':')
648  ;
649  else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':')
650  ;
651  else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))
652  return AVERROR_INVALIDDATA;
653 
654  if (is_http && c->http_persistent && *pb) {
655  ret = open_url_keepalive(c->ctx, pb, url);
656  if (ret == AVERROR_EXIT) {
657  return ret;
658  } else if (ret < 0) {
659  if (ret != AVERROR_EOF)
661  "keepalive request failed for '%s', retrying with new connection: %s\n",
662  url, av_err2str(ret));
663  ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
664  }
665  } else {
666  ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
667  }
668  if (ret >= 0) {
669  // update cookies on http response with setcookies.
670  char *new_cookies = NULL;
671 
672  if (!(s->flags & AVFMT_FLAG_CUSTOM_IO))
673  av_opt_get(*pb, "cookies", AV_OPT_SEARCH_CHILDREN, (uint8_t**)&new_cookies);
674 
675  if (new_cookies)
676  av_dict_set(&opts, "cookies", new_cookies, AV_DICT_DONT_STRDUP_VAL);
677  }
678 
679  av_dict_free(&tmp);
680 
681  if (is_http_out)
682  *is_http_out = is_http;
683 
684  return ret;
685 }
686 
687 static int parse_playlist(HLSContext *c, const char *url,
688  struct playlist *pls, AVIOContext *in)
689 {
690  int ret = 0, is_segment = 0, is_variant = 0;
691  int64_t duration = 0;
692  enum KeyType key_type = KEY_NONE;
693  uint8_t iv[16] = "";
694  int has_iv = 0;
695  char key[MAX_URL_SIZE] = "";
696  char line[MAX_URL_SIZE];
697  const char *ptr;
698  int close_in = 0;
699  int64_t seg_offset = 0;
700  int64_t seg_size = -1;
701  uint8_t *new_url = NULL;
702  struct variant_info variant_info;
703  char tmp_str[MAX_URL_SIZE];
704  struct segment *cur_init_section = NULL;
705  int is_http = av_strstart(url, "http", NULL);
706  struct segment **prev_segments = NULL;
707  int prev_n_segments = 0;
708  int prev_start_seq_no = -1;
709 
710  if (is_http && !in && c->http_persistent && c->playlist_pb) {
711  in = c->playlist_pb;
712  ret = open_url_keepalive(c->ctx, &c->playlist_pb, url);
713  if (ret == AVERROR_EXIT) {
714  return ret;
715  } else if (ret < 0) {
716  if (ret != AVERROR_EOF)
718  "keepalive request failed for '%s', retrying with new connection: %s\n",
719  url, av_err2str(ret));
720  in = NULL;
721  }
722  }
723 
724  if (!in) {
726  av_dict_copy(&opts, c->avio_opts, 0);
727 
728  if (c->http_persistent)
729  av_dict_set(&opts, "multiple_requests", "1", 0);
730 
731  ret = c->ctx->io_open(c->ctx, &in, url, AVIO_FLAG_READ, &opts);
732  av_dict_free(&opts);
733  if (ret < 0)
734  return ret;
735 
736  if (is_http && c->http_persistent)
737  c->playlist_pb = in;
738  else
739  close_in = 1;
740  }
741 
742  if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >= 0)
743  url = new_url;
744 
745  ff_get_chomp_line(in, line, sizeof(line));
746  if (strcmp(line, "#EXTM3U")) {
747  ret = AVERROR_INVALIDDATA;
748  goto fail;
749  }
750 
751  if (pls) {
752  prev_start_seq_no = pls->start_seq_no;
753  prev_segments = pls->segments;
754  prev_n_segments = pls->n_segments;
755  pls->segments = NULL;
756  pls->n_segments = 0;
757 
758  pls->finished = 0;
759  pls->type = PLS_TYPE_UNSPECIFIED;
760  }
761  while (!avio_feof(in)) {
762  ff_get_chomp_line(in, line, sizeof(line));
763  if (av_strstart(line, "#EXT-X-STREAM-INF:", &ptr)) {
764  is_variant = 1;
765  memset(&variant_info, 0, sizeof(variant_info));
767  &variant_info);
768  } else if (av_strstart(line, "#EXT-X-KEY:", &ptr)) {
769  struct key_info info = {{0}};
771  &info);
772  key_type = KEY_NONE;
773  has_iv = 0;
774  if (!strcmp(info.method, "AES-128"))
775  key_type = KEY_AES_128;
776  if (!strcmp(info.method, "SAMPLE-AES"))
777  key_type = KEY_SAMPLE_AES;
778  if (!strncmp(info.iv, "0x", 2) || !strncmp(info.iv, "0X", 2)) {
779  ff_hex_to_data(iv, info.iv + 2);
780  has_iv = 1;
781  }
782  av_strlcpy(key, info.uri, sizeof(key));
783  } else if (av_strstart(line, "#EXT-X-MEDIA:", &ptr)) {
784  struct rendition_info info = {{0}};
786  &info);
787  new_rendition(c, &info, url);
788  } else if (av_strstart(line, "#EXT-X-TARGETDURATION:", &ptr)) {
789  ret = ensure_playlist(c, &pls, url);
790  if (ret < 0)
791  goto fail;
792  pls->target_duration = strtoll(ptr, NULL, 10) * AV_TIME_BASE;
793  } else if (av_strstart(line, "#EXT-X-MEDIA-SEQUENCE:", &ptr)) {
794  ret = ensure_playlist(c, &pls, url);
795  if (ret < 0)
796  goto fail;
797  pls->start_seq_no = atoi(ptr);
798  } else if (av_strstart(line, "#EXT-X-PLAYLIST-TYPE:", &ptr)) {
799  ret = ensure_playlist(c, &pls, url);
800  if (ret < 0)
801  goto fail;
802  if (!strcmp(ptr, "EVENT"))
803  pls->type = PLS_TYPE_EVENT;
804  else if (!strcmp(ptr, "VOD"))
805  pls->type = PLS_TYPE_VOD;
806  } else if (av_strstart(line, "#EXT-X-MAP:", &ptr)) {
807  struct init_section_info info = {{0}};
808  ret = ensure_playlist(c, &pls, url);
809  if (ret < 0)
810  goto fail;
812  &info);
813  cur_init_section = new_init_section(pls, &info, url);
814  } else if (av_strstart(line, "#EXT-X-ENDLIST", &ptr)) {
815  if (pls)
816  pls->finished = 1;
817  } else if (av_strstart(line, "#EXTINF:", &ptr)) {
818  is_segment = 1;
819  duration = atof(ptr) * AV_TIME_BASE;
820  } else if (av_strstart(line, "#EXT-X-BYTERANGE:", &ptr)) {
821  seg_size = strtoll(ptr, NULL, 10);
822  ptr = strchr(ptr, '@');
823  if (ptr)
824  seg_offset = strtoll(ptr+1, NULL, 10);
825  } else if (av_strstart(line, "#", NULL)) {
826  continue;
827  } else if (line[0]) {
828  if (is_variant) {
829  if (!new_variant(c, &variant_info, line, url)) {
830  ret = AVERROR(ENOMEM);
831  goto fail;
832  }
833  is_variant = 0;
834  }
835  if (is_segment) {
836  struct segment *seg;
837  if (!pls) {
838  if (!new_variant(c, 0, url, NULL)) {
839  ret = AVERROR(ENOMEM);
840  goto fail;
841  }
842  pls = c->playlists[c->n_playlists - 1];
843  }
844  seg = av_malloc(sizeof(struct segment));
845  if (!seg) {
846  ret = AVERROR(ENOMEM);
847  goto fail;
848  }
849  seg->duration = duration;
850  seg->key_type = key_type;
851  if (has_iv) {
852  memcpy(seg->iv, iv, sizeof(iv));
853  } else {
854  int seq = pls->start_seq_no + pls->n_segments;
855  memset(seg->iv, 0, sizeof(seg->iv));
856  AV_WB32(seg->iv + 12, seq);
857  }
858 
859  if (key_type != KEY_NONE) {
860  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, key);
861  seg->key = av_strdup(tmp_str);
862  if (!seg->key) {
863  av_free(seg);
864  ret = AVERROR(ENOMEM);
865  goto fail;
866  }
867  } else {
868  seg->key = NULL;
869  }
870 
871  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, line);
872  seg->url = av_strdup(tmp_str);
873  if (!seg->url) {
874  av_free(seg->key);
875  av_free(seg);
876  ret = AVERROR(ENOMEM);
877  goto fail;
878  }
879 
880  dynarray_add(&pls->segments, &pls->n_segments, seg);
881  is_segment = 0;
882 
883  seg->size = seg_size;
884  if (seg_size >= 0) {
885  seg->url_offset = seg_offset;
886  seg_offset += seg_size;
887  seg_size = -1;
888  } else {
889  seg->url_offset = 0;
890  seg_offset = 0;
891  }
892 
893  seg->init_section = cur_init_section;
894  }
895  }
896  }
897  if (prev_segments) {
898  if (pls->start_seq_no > prev_start_seq_no && c->first_timestamp != AV_NOPTS_VALUE) {
899  int64_t prev_timestamp = c->first_timestamp;
900  int i, diff = pls->start_seq_no - prev_start_seq_no;
901  for (i = 0; i < prev_n_segments && i < diff; i++) {
902  c->first_timestamp += prev_segments[i]->duration;
903  }
904  av_log(c->ctx, AV_LOG_DEBUG, "Media sequence change (%d -> %d)"
905  " reflected in first_timestamp: %"PRId64" -> %"PRId64"\n",
906  prev_start_seq_no, pls->start_seq_no,
907  prev_timestamp, c->first_timestamp);
908  } else if (pls->start_seq_no < prev_start_seq_no) {
909  av_log(c->ctx, AV_LOG_WARNING, "Media sequence changed unexpectedly: %d -> %d\n",
910  prev_start_seq_no, pls->start_seq_no);
911  }
912  free_segment_dynarray(prev_segments, prev_n_segments);
913  }
914  if (pls)
916 
917 fail:
918  av_free(new_url);
919  if (close_in)
920  ff_format_io_close(c->ctx, &in);
921  c->ctx->ctx_flags = c->ctx->ctx_flags & ~(unsigned)AVFMTCTX_UNSEEKABLE;
922  if (!c->n_variants || !c->variants[0]->n_playlists ||
923  !(c->variants[0]->playlists[0]->finished ||
924  c->variants[0]->playlists[0]->type == PLS_TYPE_EVENT))
926  return ret;
927 }
928 
929 static struct segment *current_segment(struct playlist *pls)
930 {
931  return pls->segments[pls->cur_seq_no - pls->start_seq_no];
932 }
933 
934 static struct segment *next_segment(struct playlist *pls)
935 {
936  int n = pls->cur_seq_no - pls->start_seq_no + 1;
937  if (n >= pls->n_segments)
938  return NULL;
939  return pls->segments[n];
940 }
941 
942 static int read_from_url(struct playlist *pls, struct segment *seg,
943  uint8_t *buf, int buf_size)
944 {
945  int ret;
946 
947  /* limit read if the segment was only a part of a file */
948  if (seg->size >= 0)
949  buf_size = FFMIN(buf_size, seg->size - pls->cur_seg_offset);
950 
951  ret = avio_read(pls->input, buf, buf_size);
952  if (ret > 0)
953  pls->cur_seg_offset += ret;
954 
955  return ret;
956 }
957 
958 /* Parse the raw ID3 data and pass contents to caller */
960  AVDictionary **metadata, int64_t *dts,
961  ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta **extra_meta)
962 {
963  static const char id3_priv_owner_ts[] = "com.apple.streaming.transportStreamTimestamp";
964  ID3v2ExtraMeta *meta;
965 
966  ff_id3v2_read_dict(pb, metadata, ID3v2_DEFAULT_MAGIC, extra_meta);
967  for (meta = *extra_meta; meta; meta = meta->next) {
968  if (!strcmp(meta->tag, "PRIV")) {
969  ID3v2ExtraMetaPRIV *priv = meta->data;
970  if (priv->datasize == 8 && !strcmp(priv->owner, id3_priv_owner_ts)) {
971  /* 33-bit MPEG timestamp */
972  int64_t ts = AV_RB64(priv->data);
973  av_log(s, AV_LOG_DEBUG, "HLS ID3 audio timestamp %"PRId64"\n", ts);
974  if ((ts & ~((1ULL << 33) - 1)) == 0)
975  *dts = ts;
976  else
977  av_log(s, AV_LOG_ERROR, "Invalid HLS ID3 audio timestamp %"PRId64"\n", ts);
978  }
979  } else if (!strcmp(meta->tag, "APIC") && apic)
980  *apic = meta->data;
981  }
982 }
983 
984 /* Check if the ID3 metadata contents have changed */
985 static int id3_has_changed_values(struct playlist *pls, AVDictionary *metadata,
986  ID3v2ExtraMetaAPIC *apic)
987 {
988  AVDictionaryEntry *entry = NULL;
989  AVDictionaryEntry *oldentry;
990  /* check that no keys have changed values */
991  while ((entry = av_dict_get(metadata, "", entry, AV_DICT_IGNORE_SUFFIX))) {
992  oldentry = av_dict_get(pls->id3_initial, entry->key, NULL, AV_DICT_MATCH_CASE);
993  if (!oldentry || strcmp(oldentry->value, entry->value) != 0)
994  return 1;
995  }
996 
997  /* check if apic appeared */
998  if (apic && (pls->ctx->nb_streams != 2 || !pls->ctx->streams[1]->attached_pic.data))
999  return 1;
1000 
1001  if (apic) {
1002  int size = pls->ctx->streams[1]->attached_pic.size;
1003  if (size != apic->buf->size - AV_INPUT_BUFFER_PADDING_SIZE)
1004  return 1;
1005 
1006  if (memcmp(apic->buf->data, pls->ctx->streams[1]->attached_pic.data, size) != 0)
1007  return 1;
1008  }
1009 
1010  return 0;
1011 }
1012 
1013 /* Parse ID3 data and handle the found data */
1014 static void handle_id3(AVIOContext *pb, struct playlist *pls)
1015 {
1016  AVDictionary *metadata = NULL;
1017  ID3v2ExtraMetaAPIC *apic = NULL;
1018  ID3v2ExtraMeta *extra_meta = NULL;
1019  int64_t timestamp = AV_NOPTS_VALUE;
1020 
1021  parse_id3(pls->ctx, pb, &metadata, &timestamp, &apic, &extra_meta);
1022 
1023  if (timestamp != AV_NOPTS_VALUE) {
1024  pls->id3_mpegts_timestamp = timestamp;
1025  pls->id3_offset = 0;
1026  }
1027 
1028  if (!pls->id3_found) {
1029  /* initial ID3 tags */
1031  pls->id3_found = 1;
1032 
1033  /* get picture attachment and set text metadata */
1034  if (pls->ctx->nb_streams)
1035  ff_id3v2_parse_apic(pls->ctx, &extra_meta);
1036  else
1037  /* demuxer not yet opened, defer picture attachment */
1038  pls->id3_deferred_extra = extra_meta;
1039 
1040  ff_id3v2_parse_priv_dict(&metadata, &extra_meta);
1041  av_dict_copy(&pls->ctx->metadata, metadata, 0);
1042  pls->id3_initial = metadata;
1043 
1044  } else {
1045  if (!pls->id3_changed && id3_has_changed_values(pls, metadata, apic)) {
1046  avpriv_report_missing_feature(pls->ctx, "Changing ID3 metadata in HLS audio elementary stream");
1047  pls->id3_changed = 1;
1048  }
1049  av_dict_free(&metadata);
1050  }
1051 
1052  if (!pls->id3_deferred_extra)
1053  ff_id3v2_free_extra_meta(&extra_meta);
1054 }
1055 
1056 static void intercept_id3(struct playlist *pls, uint8_t *buf,
1057  int buf_size, int *len)
1058 {
1059  /* intercept id3 tags, we do not want to pass them to the raw
1060  * demuxer on all segment switches */
1061  int bytes;
1062  int id3_buf_pos = 0;
1063  int fill_buf = 0;
1064  struct segment *seg = current_segment(pls);
1065 
1066  /* gather all the id3 tags */
1067  while (1) {
1068  /* see if we can retrieve enough data for ID3 header */
1069  if (*len < ID3v2_HEADER_SIZE && buf_size >= ID3v2_HEADER_SIZE) {
1070  bytes = read_from_url(pls, seg, buf + *len, ID3v2_HEADER_SIZE - *len);
1071  if (bytes > 0) {
1072 
1073  if (bytes == ID3v2_HEADER_SIZE - *len)
1074  /* no EOF yet, so fill the caller buffer again after
1075  * we have stripped the ID3 tags */
1076  fill_buf = 1;
1077 
1078  *len += bytes;
1079 
1080  } else if (*len <= 0) {
1081  /* error/EOF */
1082  *len = bytes;
1083  fill_buf = 0;
1084  }
1085  }
1086 
1087  if (*len < ID3v2_HEADER_SIZE)
1088  break;
1089 
1090  if (ff_id3v2_match(buf, ID3v2_DEFAULT_MAGIC)) {
1091  int64_t maxsize = seg->size >= 0 ? seg->size : 1024*1024;
1092  int taglen = ff_id3v2_tag_len(buf);
1093  int tag_got_bytes = FFMIN(taglen, *len);
1094  int remaining = taglen - tag_got_bytes;
1095 
1096  if (taglen > maxsize) {
1097  av_log(pls->ctx, AV_LOG_ERROR, "Too large HLS ID3 tag (%d > %"PRId64" bytes)\n",
1098  taglen, maxsize);
1099  break;
1100  }
1101 
1102  /*
1103  * Copy the id3 tag to our temporary id3 buffer.
1104  * We could read a small id3 tag directly without memcpy, but
1105  * we would still need to copy the large tags, and handling
1106  * both of those cases together with the possibility for multiple
1107  * tags would make the handling a bit complex.
1108  */
1109  pls->id3_buf = av_fast_realloc(pls->id3_buf, &pls->id3_buf_size, id3_buf_pos + taglen);
1110  if (!pls->id3_buf)
1111  break;
1112  memcpy(pls->id3_buf + id3_buf_pos, buf, tag_got_bytes);
1113  id3_buf_pos += tag_got_bytes;
1114 
1115  /* strip the intercepted bytes */
1116  *len -= tag_got_bytes;
1117  memmove(buf, buf + tag_got_bytes, *len);
1118  av_log(pls->ctx, AV_LOG_DEBUG, "Stripped %d HLS ID3 bytes\n", tag_got_bytes);
1119 
1120  if (remaining > 0) {
1121  /* read the rest of the tag in */
1122  if (read_from_url(pls, seg, pls->id3_buf + id3_buf_pos, remaining) != remaining)
1123  break;
1124  id3_buf_pos += remaining;
1125  av_log(pls->ctx, AV_LOG_DEBUG, "Stripped additional %d HLS ID3 bytes\n", remaining);
1126  }
1127 
1128  } else {
1129  /* no more ID3 tags */
1130  break;
1131  }
1132  }
1133 
1134  /* re-fill buffer for the caller unless EOF */
1135  if (*len >= 0 && (fill_buf || *len == 0)) {
1136  bytes = read_from_url(pls, seg, buf + *len, buf_size - *len);
1137 
1138  /* ignore error if we already had some data */
1139  if (bytes >= 0)
1140  *len += bytes;
1141  else if (*len == 0)
1142  *len = bytes;
1143  }
1144 
1145  if (pls->id3_buf) {
1146  /* Now parse all the ID3 tags */
1147  AVIOContext id3ioctx;
1148  ffio_init_context(&id3ioctx, pls->id3_buf, id3_buf_pos, 0, NULL, NULL, NULL, NULL);
1149  handle_id3(&id3ioctx, pls);
1150  }
1151 
1152  if (pls->is_id3_timestamped == -1)
1154 }
1155 
1156 static int open_input(HLSContext *c, struct playlist *pls, struct segment *seg, AVIOContext **in)
1157 {
1158  AVDictionary *opts = NULL;
1159  int ret;
1160  int is_http = 0;
1161 
1162  if (c->http_persistent)
1163  av_dict_set(&opts, "multiple_requests", "1", 0);
1164 
1165  if (seg->size >= 0) {
1166  /* try to restrict the HTTP request to the part we want
1167  * (if this is in fact a HTTP request) */
1168  av_dict_set_int(&opts, "offset", seg->url_offset, 0);
1169  av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
1170  }
1171 
1172  av_log(pls->parent, AV_LOG_VERBOSE, "HLS request for url '%s', offset %"PRId64", playlist %d\n",
1173  seg->url, seg->url_offset, pls->index);
1174 
1175  if (seg->key_type == KEY_NONE) {
1176  ret = open_url(pls->parent, in, seg->url, c->avio_opts, opts, &is_http);
1177  } else if (seg->key_type == KEY_AES_128) {
1178  char iv[33], key[33], url[MAX_URL_SIZE];
1179  if (strcmp(seg->key, pls->key_url)) {
1180  AVIOContext *pb = NULL;
1181  if (open_url(pls->parent, &pb, seg->key, c->avio_opts, opts, NULL) == 0) {
1182  ret = avio_read(pb, pls->key, sizeof(pls->key));
1183  if (ret != sizeof(pls->key)) {
1184  av_log(NULL, AV_LOG_ERROR, "Unable to read key file %s\n",
1185  seg->key);
1186  }
1187  ff_format_io_close(pls->parent, &pb);
1188  } else {
1189  av_log(NULL, AV_LOG_ERROR, "Unable to open key file %s\n",
1190  seg->key);
1191  }
1192  av_strlcpy(pls->key_url, seg->key, sizeof(pls->key_url));
1193  }
1194  ff_data_to_hex(iv, seg->iv, sizeof(seg->iv), 0);
1195  ff_data_to_hex(key, pls->key, sizeof(pls->key), 0);
1196  iv[32] = key[32] = '\0';
1197  if (strstr(seg->url, "://"))
1198  snprintf(url, sizeof(url), "crypto+%s", seg->url);
1199  else
1200  snprintf(url, sizeof(url), "crypto:%s", seg->url);
1201 
1202  av_dict_set(&opts, "key", key, 0);
1203  av_dict_set(&opts, "iv", iv, 0);
1204 
1205  ret = open_url(pls->parent, in, url, c->avio_opts, opts, &is_http);
1206  if (ret < 0) {
1207  goto cleanup;
1208  }
1209  ret = 0;
1210  } else if (seg->key_type == KEY_SAMPLE_AES) {
1211  av_log(pls->parent, AV_LOG_ERROR,
1212  "SAMPLE-AES encryption is not supported yet\n");
1213  ret = AVERROR_PATCHWELCOME;
1214  }
1215  else
1216  ret = AVERROR(ENOSYS);
1217 
1218  /* Seek to the requested position. If this was a HTTP request, the offset
1219  * should already be where want it to, but this allows e.g. local testing
1220  * without a HTTP server.
1221  *
1222  * This is not done for HTTP at all as avio_seek() does internal bookkeeping
1223  * of file offset which is out-of-sync with the actual offset when "offset"
1224  * AVOption is used with http protocol, causing the seek to not be a no-op
1225  * as would be expected. Wrong offset received from the server will not be
1226  * noticed without the call, though.
1227  */
1228  if (ret == 0 && !is_http && seg->key_type == KEY_NONE && seg->url_offset) {
1229  int64_t seekret = avio_seek(*in, seg->url_offset, SEEK_SET);
1230  if (seekret < 0) {
1231  av_log(pls->parent, AV_LOG_ERROR, "Unable to seek to offset %"PRId64" of HLS segment '%s'\n", seg->url_offset, seg->url);
1232  ret = seekret;
1233  ff_format_io_close(pls->parent, in);
1234  }
1235  }
1236 
1237 cleanup:
1238  av_dict_free(&opts);
1239  pls->cur_seg_offset = 0;
1240  return ret;
1241 }
1242 
1243 static int update_init_section(struct playlist *pls, struct segment *seg)
1244 {
1245  static const int max_init_section_size = 1024*1024;
1246  HLSContext *c = pls->parent->priv_data;
1247  int64_t sec_size;
1248  int64_t urlsize;
1249  int ret;
1250 
1251  if (seg->init_section == pls->cur_init_section)
1252  return 0;
1253 
1254  pls->cur_init_section = NULL;
1255 
1256  if (!seg->init_section)
1257  return 0;
1258 
1259  ret = open_input(c, pls, seg->init_section, &pls->input);
1260  if (ret < 0) {
1262  "Failed to open an initialization section in playlist %d\n",
1263  pls->index);
1264  return ret;
1265  }
1266 
1267  if (seg->init_section->size >= 0)
1268  sec_size = seg->init_section->size;
1269  else if ((urlsize = avio_size(pls->input)) >= 0)
1270  sec_size = urlsize;
1271  else
1272  sec_size = max_init_section_size;
1273 
1274  av_log(pls->parent, AV_LOG_DEBUG,
1275  "Downloading an initialization section of size %"PRId64"\n",
1276  sec_size);
1277 
1278  sec_size = FFMIN(sec_size, max_init_section_size);
1279 
1280  av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size);
1281 
1282  ret = read_from_url(pls, seg->init_section, pls->init_sec_buf,
1283  pls->init_sec_buf_size);
1284  ff_format_io_close(pls->parent, &pls->input);
1285 
1286  if (ret < 0)
1287  return ret;
1288 
1289  pls->cur_init_section = seg->init_section;
1290  pls->init_sec_data_len = ret;
1291  pls->init_sec_buf_read_offset = 0;
1292 
1293  /* spec says audio elementary streams do not have media initialization
1294  * sections, so there should be no ID3 timestamps */
1295  pls->is_id3_timestamped = 0;
1296 
1297  return 0;
1298 }
1299 
1300 static int64_t default_reload_interval(struct playlist *pls)
1301 {
1302  return pls->n_segments > 0 ?
1303  pls->segments[pls->n_segments - 1]->duration :
1304  pls->target_duration;
1305 }
1306 
1307 static int playlist_needed(struct playlist *pls)
1308 {
1309  AVFormatContext *s = pls->parent;
1310  int i, j;
1311  int stream_needed = 0;
1312  int first_st;
1313 
1314  /* If there is no context or streams yet, the playlist is needed */
1315  if (!pls->ctx || !pls->n_main_streams)
1316  return 1;
1317 
1318  /* check if any of the streams in the playlist are needed */
1319  for (i = 0; i < pls->n_main_streams; i++) {
1320  if (pls->main_streams[i]->discard < AVDISCARD_ALL) {
1321  stream_needed = 1;
1322  break;
1323  }
1324  }
1325 
1326  /* If all streams in the playlist were discarded, the playlist is not
1327  * needed (regardless of whether whole programs are discarded or not). */
1328  if (!stream_needed)
1329  return 0;
1330 
1331  /* Otherwise, check if all the programs (variants) this playlist is in are
1332  * discarded. Since all streams in the playlist are part of the same programs
1333  * we can just check the programs of the first stream. */
1334 
1335  first_st = pls->main_streams[0]->index;
1336 
1337  for (i = 0; i < s->nb_programs; i++) {
1338  AVProgram *program = s->programs[i];
1339  if (program->discard < AVDISCARD_ALL) {
1340  for (j = 0; j < program->nb_stream_indexes; j++) {
1341  if (program->stream_index[j] == first_st) {
1342  /* playlist is in an undiscarded program */
1343  return 1;
1344  }
1345  }
1346  }
1347  }
1348 
1349  /* some streams were not discarded but all the programs were */
1350  return 0;
1351 }
1352 
1353 static int read_data(void *opaque, uint8_t *buf, int buf_size)
1354 {
1355  struct playlist *v = opaque;
1356  HLSContext *c = v->parent->priv_data;
1357  int ret;
1358  int just_opened = 0;
1359  int reload_count = 0;
1360  struct segment *seg;
1361 
1362 restart:
1363  if (!v->needed)
1364  return AVERROR_EOF;
1365 
1366  if (!v->input || (c->http_persistent && v->input_read_done)) {
1367  int64_t reload_interval;
1368 
1369  /* Check that the playlist is still needed before opening a new
1370  * segment. */
1371  v->needed = playlist_needed(v);
1372 
1373  if (!v->needed) {
1374  av_log(v->parent, AV_LOG_INFO, "No longer receiving playlist %d\n",
1375  v->index);
1376  return AVERROR_EOF;
1377  }
1378 
1379  /* If this is a live stream and the reload interval has elapsed since
1380  * the last playlist reload, reload the playlists now. */
1381  reload_interval = default_reload_interval(v);
1382 
1383 reload:
1384  reload_count++;
1385  if (reload_count > c->max_reload)
1386  return AVERROR_EOF;
1387  if (!v->finished &&
1388  av_gettime_relative() - v->last_load_time >= reload_interval) {
1389  if ((ret = parse_playlist(c, v->url, v, NULL)) < 0) {
1390  if (ret != AVERROR_EXIT)
1391  av_log(v->parent, AV_LOG_WARNING, "Failed to reload playlist %d\n",
1392  v->index);
1393  return ret;
1394  }
1395  /* If we need to reload the playlist again below (if
1396  * there's still no more segments), switch to a reload
1397  * interval of half the target duration. */
1398  reload_interval = v->target_duration / 2;
1399  }
1400  if (v->cur_seq_no < v->start_seq_no) {
1402  "skipping %d segments ahead, expired from playlists\n",
1403  v->start_seq_no - v->cur_seq_no);
1404  v->cur_seq_no = v->start_seq_no;
1405  }
1406  if (v->cur_seq_no >= v->start_seq_no + v->n_segments) {
1407  if (v->finished)
1408  return AVERROR_EOF;
1409  while (av_gettime_relative() - v->last_load_time < reload_interval) {
1411  return AVERROR_EXIT;
1412  av_usleep(100*1000);
1413  }
1414  /* Enough time has elapsed since the last reload */
1415  goto reload;
1416  }
1417 
1418  v->input_read_done = 0;
1419  seg = current_segment(v);
1420 
1421  /* load/update Media Initialization Section, if any */
1422  ret = update_init_section(v, seg);
1423  if (ret)
1424  return ret;
1425 
1426  if (c->http_multiple == 1 && v->input_next_requested) {
1427  FFSWAP(AVIOContext *, v->input, v->input_next);
1428  v->input_next_requested = 0;
1429  ret = 0;
1430  } else {
1431  ret = open_input(c, v, seg, &v->input);
1432  }
1433  if (ret < 0) {
1435  return AVERROR_EXIT;
1436  av_log(v->parent, AV_LOG_WARNING, "Failed to open segment %d of playlist %d\n",
1437  v->cur_seq_no,
1438  v->index);
1439  v->cur_seq_no += 1;
1440  goto reload;
1441  }
1442  just_opened = 1;
1443  }
1444 
1445  if (c->http_multiple == -1) {
1446  uint8_t *http_version_opt = NULL;
1447  int r = av_opt_get(v->input, "http_version", AV_OPT_SEARCH_CHILDREN, &http_version_opt);
1448  if (r >= 0) {
1449  c->http_multiple = strncmp((const char *)http_version_opt, "1.1", 3) == 0;
1450  av_freep(&http_version_opt);
1451  }
1452  }
1453 
1454  seg = next_segment(v);
1455  if (c->http_multiple == 1 && !v->input_next_requested &&
1456  seg && seg->key_type == KEY_NONE && av_strstart(seg->url, "http", NULL)) {
1457  ret = open_input(c, v, seg, &v->input_next);
1458  if (ret < 0) {
1460  return AVERROR_EXIT;
1461  av_log(v->parent, AV_LOG_WARNING, "Failed to open segment %d of playlist %d\n",
1462  v->cur_seq_no + 1,
1463  v->index);
1464  } else {
1465  v->input_next_requested = 1;
1466  }
1467  }
1468 
1470  /* Push init section out first before first actual segment */
1471  int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size);
1472  memcpy(buf, v->init_sec_buf, copy_size);
1473  v->init_sec_buf_read_offset += copy_size;
1474  return copy_size;
1475  }
1476 
1477  seg = current_segment(v);
1478  ret = read_from_url(v, seg, buf, buf_size);
1479  if (ret > 0) {
1480  if (just_opened && v->is_id3_timestamped != 0) {
1481  /* Intercept ID3 tags here, elementary audio streams are required
1482  * to convey timestamps using them in the beginning of each segment. */
1483  intercept_id3(v, buf, buf_size, &ret);
1484  }
1485 
1486  return ret;
1487  }
1488  if (c->http_persistent &&
1489  seg->key_type == KEY_NONE && av_strstart(seg->url, "http", NULL)) {
1490  v->input_read_done = 1;
1491  } else {
1492  ff_format_io_close(v->parent, &v->input);
1493  }
1494  v->cur_seq_no++;
1495 
1496  c->cur_seq_no = v->cur_seq_no;
1497 
1498  goto restart;
1499 }
1500 
1501 static void add_renditions_to_variant(HLSContext *c, struct variant *var,
1502  enum AVMediaType type, const char *group_id)
1503 {
1504  int i;
1505 
1506  for (i = 0; i < c->n_renditions; i++) {
1507  struct rendition *rend = c->renditions[i];
1508 
1509  if (rend->type == type && !strcmp(rend->group_id, group_id)) {
1510 
1511  if (rend->playlist)
1512  /* rendition is an external playlist
1513  * => add the playlist to the variant */
1514  dynarray_add(&var->playlists, &var->n_playlists, rend->playlist);
1515  else
1516  /* rendition is part of the variant main Media Playlist
1517  * => add the rendition to the main Media Playlist */
1518  dynarray_add(&var->playlists[0]->renditions,
1519  &var->playlists[0]->n_renditions,
1520  rend);
1521  }
1522  }
1523 }
1524 
1526  enum AVMediaType type)
1527 {
1528  int rend_idx = 0;
1529  int i;
1530 
1531  for (i = 0; i < pls->n_main_streams; i++) {
1532  AVStream *st = pls->main_streams[i];
1533 
1534  if (st->codecpar->codec_type != type)
1535  continue;
1536 
1537  for (; rend_idx < pls->n_renditions; rend_idx++) {
1538  struct rendition *rend = pls->renditions[rend_idx];
1539 
1540  if (rend->type != type)
1541  continue;
1542 
1543  if (rend->language[0])
1544  av_dict_set(&st->metadata, "language", rend->language, 0);
1545  if (rend->name[0])
1546  av_dict_set(&st->metadata, "comment", rend->name, 0);
1547 
1548  st->disposition |= rend->disposition;
1549  }
1550  if (rend_idx >=pls->n_renditions)
1551  break;
1552  }
1553 }
1554 
1555 /* if timestamp was in valid range: returns 1 and sets seq_no
1556  * if not: returns 0 and sets seq_no to closest segment */
1558  int64_t timestamp, int *seq_no)
1559 {
1560  int i;
1561  int64_t pos = c->first_timestamp == AV_NOPTS_VALUE ?
1562  0 : c->first_timestamp;
1563 
1564  if (timestamp < pos) {
1565  *seq_no = pls->start_seq_no;
1566  return 0;
1567  }
1568 
1569  for (i = 0; i < pls->n_segments; i++) {
1570  int64_t diff = pos + pls->segments[i]->duration - timestamp;
1571  if (diff > 0) {
1572  *seq_no = pls->start_seq_no + i;
1573  return 1;
1574  }
1575  pos += pls->segments[i]->duration;
1576  }
1577 
1578  *seq_no = pls->start_seq_no + pls->n_segments - 1;
1579 
1580  return 0;
1581 }
1582 
1583 static int select_cur_seq_no(HLSContext *c, struct playlist *pls)
1584 {
1585  int seq_no;
1586 
1587  if (!pls->finished && !c->first_packet &&
1589  /* reload the playlist since it was suspended */
1590  parse_playlist(c, pls->url, pls, NULL);
1591 
1592  /* If playback is already in progress (we are just selecting a new
1593  * playlist) and this is a complete file, find the matching segment
1594  * by counting durations. */
1595  if (pls->finished && c->cur_timestamp != AV_NOPTS_VALUE) {
1596  find_timestamp_in_playlist(c, pls, c->cur_timestamp, &seq_no);
1597  return seq_no;
1598  }
1599 
1600  if (!pls->finished) {
1601  if (!c->first_packet && /* we are doing a segment selection during playback */
1602  c->cur_seq_no >= pls->start_seq_no &&
1603  c->cur_seq_no < pls->start_seq_no + pls->n_segments)
1604  /* While spec 3.4.3 says that we cannot assume anything about the
1605  * content at the same sequence number on different playlists,
1606  * in practice this seems to work and doing it otherwise would
1607  * require us to download a segment to inspect its timestamps. */
1608  return c->cur_seq_no;
1609 
1610  /* If this is a live stream, start live_start_index segments from the
1611  * start or end */
1612  if (c->live_start_index < 0)
1613  return pls->start_seq_no + FFMAX(pls->n_segments + c->live_start_index, 0);
1614  else
1615  return pls->start_seq_no + FFMIN(c->live_start_index, pls->n_segments - 1);
1616  }
1617 
1618  /* Otherwise just start on the first segment. */
1619  return pls->start_seq_no;
1620 }
1621 
1623 {
1624  HLSContext *c = s->priv_data;
1625  static const char * const opts[] = {
1626  "headers", "http_proxy", "user_agent", "cookies", "referer", "rw_timeout", NULL };
1627  const char * const * opt = opts;
1628  uint8_t *buf;
1629  int ret = 0;
1630 
1631  while (*opt) {
1632  if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN | AV_OPT_ALLOW_NULL, &buf) >= 0) {
1633  ret = av_dict_set(&c->avio_opts, *opt, buf,
1635  if (ret < 0)
1636  return ret;
1637  }
1638  opt++;
1639  }
1640 
1641  return ret;
1642 }
1643 
1644 static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url,
1645  int flags, AVDictionary **opts)
1646 {
1647  av_log(s, AV_LOG_ERROR,
1648  "A HLS playlist item '%s' referred to an external file '%s'. "
1649  "Opening this file was forbidden for security reasons\n",
1650  s->url, url);
1651  return AVERROR(EPERM);
1652 }
1653 
1654 static void add_stream_to_programs(AVFormatContext *s, struct playlist *pls, AVStream *stream)
1655 {
1656  HLSContext *c = s->priv_data;
1657  int i, j;
1658  int bandwidth = -1;
1659 
1660  for (i = 0; i < c->n_variants; i++) {
1661  struct variant *v = c->variants[i];
1662 
1663  for (j = 0; j < v->n_playlists; j++) {
1664  if (v->playlists[j] != pls)
1665  continue;
1666 
1667  av_program_add_stream_index(s, i, stream->index);
1668 
1669  if (bandwidth < 0)
1670  bandwidth = v->bandwidth;
1671  else if (bandwidth != v->bandwidth)
1672  bandwidth = -1; /* stream in multiple variants with different bandwidths */
1673  }
1674  }
1675 
1676  if (bandwidth >= 0)
1677  av_dict_set_int(&stream->metadata, "variant_bitrate", bandwidth, 0);
1678 }
1679 
1681 {
1682  int err;
1683 
1684  err = avcodec_parameters_copy(st->codecpar, ist->codecpar);
1685  if (err < 0)
1686  return err;
1687 
1688  if (pls->is_id3_timestamped) /* custom timestamps via id3 */
1689  avpriv_set_pts_info(st, 33, 1, MPEG_TIME_BASE);
1690  else
1692 
1693  st->internal->need_context_update = 1;
1694 
1695  return 0;
1696 }
1697 
1698 /* add new subdemuxer streams to our context, if any */
1700 {
1701  int err;
1702 
1703  while (pls->n_main_streams < pls->ctx->nb_streams) {
1704  int ist_idx = pls->n_main_streams;
1705  AVStream *st = avformat_new_stream(s, NULL);
1706  AVStream *ist = pls->ctx->streams[ist_idx];
1707 
1708  if (!st)
1709  return AVERROR(ENOMEM);
1710 
1711  st->id = pls->index;
1712  dynarray_add(&pls->main_streams, &pls->n_main_streams, st);
1713 
1714  add_stream_to_programs(s, pls, st);
1715 
1716  err = set_stream_info_from_input_stream(st, pls, ist);
1717  if (err < 0)
1718  return err;
1719  }
1720 
1721  return 0;
1722 }
1723 
1725 {
1726  HLSContext *c = s->priv_data;
1727  int flag_needed = 0;
1728  int i;
1729 
1730  for (i = 0; i < c->n_playlists; i++) {
1731  struct playlist *pls = c->playlists[i];
1732 
1733  if (pls->has_noheader_flag) {
1734  flag_needed = 1;
1735  break;
1736  }
1737  }
1738 
1739  if (flag_needed)
1741  else
1743 }
1744 
1746 {
1747  HLSContext *c = s->priv_data;
1748 
1749  free_playlist_list(c);
1750  free_variant_list(c);
1752 
1753  av_dict_free(&c->avio_opts);
1755 
1756  return 0;
1757 }
1758 
1760 {
1761  HLSContext *c = s->priv_data;
1762  int ret = 0, i;
1763  int highest_cur_seq_no = 0;
1764 
1765  c->ctx = s;
1768 
1769  c->first_packet = 1;
1772 
1773  if ((ret = save_avio_options(s)) < 0)
1774  goto fail;
1775 
1776  /* Some HLS servers don't like being sent the range header */
1777  av_dict_set(&c->avio_opts, "seekable", "0", 0);
1778 
1779  if ((ret = parse_playlist(c, s->url, NULL, s->pb)) < 0)
1780  goto fail;
1781 
1782  if (c->n_variants == 0) {
1783  av_log(NULL, AV_LOG_WARNING, "Empty playlist\n");
1784  ret = AVERROR_EOF;
1785  goto fail;
1786  }
1787  /* If the playlist only contained playlists (Master Playlist),
1788  * parse each individual playlist. */
1789  if (c->n_playlists > 1 || c->playlists[0]->n_segments == 0) {
1790  for (i = 0; i < c->n_playlists; i++) {
1791  struct playlist *pls = c->playlists[i];
1792  if ((ret = parse_playlist(c, pls->url, pls, NULL)) < 0)
1793  goto fail;
1794  }
1795  }
1796 
1797  if (c->variants[0]->playlists[0]->n_segments == 0) {
1798  av_log(NULL, AV_LOG_WARNING, "Empty playlist\n");
1799  ret = AVERROR_EOF;
1800  goto fail;
1801  }
1802 
1803  /* If this isn't a live stream, calculate the total duration of the
1804  * stream. */
1805  if (c->variants[0]->playlists[0]->finished) {
1806  int64_t duration = 0;
1807  for (i = 0; i < c->variants[0]->playlists[0]->n_segments; i++)
1808  duration += c->variants[0]->playlists[0]->segments[i]->duration;
1809  s->duration = duration;
1810  }
1811 
1812  /* Associate renditions with variants */
1813  for (i = 0; i < c->n_variants; i++) {
1814  struct variant *var = c->variants[i];
1815 
1816  if (var->audio_group[0])
1818  if (var->video_group[0])
1820  if (var->subtitles_group[0])
1822  }
1823 
1824  /* Create a program for each variant */
1825  for (i = 0; i < c->n_variants; i++) {
1826  struct variant *v = c->variants[i];
1827  AVProgram *program;
1828 
1829  program = av_new_program(s, i);
1830  if (!program)
1831  goto fail;
1832  av_dict_set_int(&program->metadata, "variant_bitrate", v->bandwidth, 0);
1833  }
1834 
1835  /* Select the starting segments */
1836  for (i = 0; i < c->n_playlists; i++) {
1837  struct playlist *pls = c->playlists[i];
1838 
1839  if (pls->n_segments == 0)
1840  continue;
1841 
1842  pls->cur_seq_no = select_cur_seq_no(c, pls);
1843  highest_cur_seq_no = FFMAX(highest_cur_seq_no, pls->cur_seq_no);
1844  }
1845 
1846  /* Open the demuxer for each playlist */
1847  for (i = 0; i < c->n_playlists; i++) {
1848  struct playlist *pls = c->playlists[i];
1849  AVInputFormat *in_fmt = NULL;
1850 
1851  if (!(pls->ctx = avformat_alloc_context())) {
1852  ret = AVERROR(ENOMEM);
1853  goto fail;
1854  }
1855 
1856  if (pls->n_segments == 0)
1857  continue;
1858 
1859  pls->index = i;
1860  pls->needed = 1;
1861  pls->parent = s;
1862 
1863  /*
1864  * If this is a live stream and this playlist looks like it is one segment
1865  * behind, try to sync it up so that every substream starts at the same
1866  * time position (so e.g. avformat_find_stream_info() will see packets from
1867  * all active streams within the first few seconds). This is not very generic,
1868  * though, as the sequence numbers are technically independent.
1869  */
1870  if (!pls->finished && pls->cur_seq_no == highest_cur_seq_no - 1 &&
1871  highest_cur_seq_no < pls->start_seq_no + pls->n_segments) {
1872  pls->cur_seq_no = highest_cur_seq_no;
1873  }
1874 
1876  if (!pls->read_buffer){
1877  ret = AVERROR(ENOMEM);
1878  avformat_free_context(pls->ctx);
1879  pls->ctx = NULL;
1880  goto fail;
1881  }
1882  ffio_init_context(&pls->pb, pls->read_buffer, INITIAL_BUFFER_SIZE, 0, pls,
1883  read_data, NULL, NULL);
1884  pls->pb.seekable = 0;
1885  ret = av_probe_input_buffer(&pls->pb, &in_fmt, pls->segments[0]->url,
1886  NULL, 0, 0);
1887  if (ret < 0) {
1888  /* Free the ctx - it isn't initialized properly at this point,
1889  * so avformat_close_input shouldn't be called. If
1890  * avformat_open_input fails below, it frees and zeros the
1891  * context, so it doesn't need any special treatment like this. */
1892  av_log(s, AV_LOG_ERROR, "Error when loading first segment '%s'\n", pls->segments[0]->url);
1893  avformat_free_context(pls->ctx);
1894  pls->ctx = NULL;
1895  goto fail;
1896  }
1897  pls->ctx->pb = &pls->pb;
1898  pls->ctx->io_open = nested_io_open;
1899  pls->ctx->flags |= s->flags & ~AVFMT_FLAG_CUSTOM_IO;
1900 
1901  if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
1902  goto fail;
1903 
1904  ret = avformat_open_input(&pls->ctx, pls->segments[0]->url, in_fmt, NULL);
1905  if (ret < 0)
1906  goto fail;
1907 
1908  if (pls->id3_deferred_extra && pls->ctx->nb_streams == 1) {
1913  pls->id3_deferred_extra = NULL;
1914  }
1915 
1916  if (pls->is_id3_timestamped == -1)
1917  av_log(s, AV_LOG_WARNING, "No expected HTTP requests have been made\n");
1918 
1919  /*
1920  * For ID3 timestamped raw audio streams we need to detect the packet
1921  * durations to calculate timestamps in fill_timing_for_id3_timestamped_stream(),
1922  * but for other streams we can rely on our user calling avformat_find_stream_info()
1923  * on us if they want to.
1924  */
1925  if (pls->is_id3_timestamped) {
1926  ret = avformat_find_stream_info(pls->ctx, NULL);
1927  if (ret < 0)
1928  goto fail;
1929  }
1930 
1931  pls->has_noheader_flag = !!(pls->ctx->ctx_flags & AVFMTCTX_NOHEADER);
1932 
1933  /* Create new AVStreams for each stream in this playlist */
1934  ret = update_streams_from_subdemuxer(s, pls);
1935  if (ret < 0)
1936  goto fail;
1937 
1938  /*
1939  * Copy any metadata from playlist to main streams, but do not set
1940  * event flags.
1941  */
1942  if (pls->n_main_streams)
1943  av_dict_copy(&pls->main_streams[0]->metadata, pls->ctx->metadata, 0);
1944 
1948  }
1949 
1951 
1952  return 0;
1953 fail:
1954  hls_close(s);
1955  return ret;
1956 }
1957 
1958 static int recheck_discard_flags(AVFormatContext *s, int first)
1959 {
1960  HLSContext *c = s->priv_data;
1961  int i, changed = 0;
1962  int cur_needed;
1963 
1964  /* Check if any new streams are needed */
1965  for (i = 0; i < c->n_playlists; i++) {
1966  struct playlist *pls = c->playlists[i];
1967 
1968  cur_needed = playlist_needed(c->playlists[i]);
1969 
1970  if (cur_needed && !pls->needed) {
1971  pls->needed = 1;
1972  changed = 1;
1973  pls->cur_seq_no = select_cur_seq_no(c, pls);
1974  pls->pb.eof_reached = 0;
1975  if (c->cur_timestamp != AV_NOPTS_VALUE) {
1976  /* catch up */
1977  pls->seek_timestamp = c->cur_timestamp;
1978  pls->seek_flags = AVSEEK_FLAG_ANY;
1979  pls->seek_stream_index = -1;
1980  }
1981  av_log(s, AV_LOG_INFO, "Now receiving playlist %d, segment %d\n", i, pls->cur_seq_no);
1982  } else if (first && !cur_needed && pls->needed) {
1983  if (pls->input)
1984  ff_format_io_close(pls->parent, &pls->input);
1985  pls->input_read_done = 0;
1986  if (pls->input_next)
1987  ff_format_io_close(pls->parent, &pls->input_next);
1988  pls->input_next_requested = 0;
1989  pls->needed = 0;
1990  changed = 1;
1991  av_log(s, AV_LOG_INFO, "No longer receiving playlist %d\n", i);
1992  }
1993  }
1994  return changed;
1995 }
1996 
1998 {
1999  if (pls->id3_offset >= 0) {
2000  pls->pkt.dts = pls->id3_mpegts_timestamp +
2001  av_rescale_q(pls->id3_offset,
2002  pls->ctx->streams[pls->pkt.stream_index]->time_base,
2004  if (pls->pkt.duration)
2005  pls->id3_offset += pls->pkt.duration;
2006  else
2007  pls->id3_offset = -1;
2008  } else {
2009  /* there have been packets with unknown duration
2010  * since the last id3 tag, should not normally happen */
2011  pls->pkt.dts = AV_NOPTS_VALUE;
2012  }
2013 
2014  if (pls->pkt.duration)
2015  pls->pkt.duration = av_rescale_q(pls->pkt.duration,
2016  pls->ctx->streams[pls->pkt.stream_index]->time_base,
2018 
2019  pls->pkt.pts = AV_NOPTS_VALUE;
2020 }
2021 
2022 static AVRational get_timebase(struct playlist *pls)
2023 {
2024  if (pls->is_id3_timestamped)
2025  return MPEG_TIME_BASE_Q;
2026 
2027  return pls->ctx->streams[pls->pkt.stream_index]->time_base;
2028 }
2029 
2030 static int compare_ts_with_wrapdetect(int64_t ts_a, struct playlist *pls_a,
2031  int64_t ts_b, struct playlist *pls_b)
2032 {
2033  int64_t scaled_ts_a = av_rescale_q(ts_a, get_timebase(pls_a), MPEG_TIME_BASE_Q);
2034  int64_t scaled_ts_b = av_rescale_q(ts_b, get_timebase(pls_b), MPEG_TIME_BASE_Q);
2035 
2036  return av_compare_mod(scaled_ts_a, scaled_ts_b, 1LL << 33);
2037 }
2038 
2040 {
2041  HLSContext *c = s->priv_data;
2042  int ret, i, minplaylist = -1;
2043 
2045  c->first_packet = 0;
2046 
2047  for (i = 0; i < c->n_playlists; i++) {
2048  struct playlist *pls = c->playlists[i];
2049  /* Make sure we've got one buffered packet from each open playlist
2050  * stream */
2051  if (pls->needed && !pls->pkt.data) {
2052  while (1) {
2053  int64_t ts_diff;
2054  AVRational tb;
2055  ret = av_read_frame(pls->ctx, &pls->pkt);
2056  if (ret < 0) {
2057  if (!avio_feof(&pls->pb) && ret != AVERROR_EOF)
2058  return ret;
2059  reset_packet(&pls->pkt);
2060  break;
2061  } else {
2062  /* stream_index check prevents matching picture attachments etc. */
2063  if (pls->is_id3_timestamped && pls->pkt.stream_index == 0) {
2064  /* audio elementary streams are id3 timestamped */
2066  }
2067 
2068  if (c->first_timestamp == AV_NOPTS_VALUE &&
2069  pls->pkt.dts != AV_NOPTS_VALUE)
2070  c->first_timestamp = av_rescale_q(pls->pkt.dts,
2072  }
2073 
2074  if (pls->seek_timestamp == AV_NOPTS_VALUE)
2075  break;
2076 
2077  if (pls->seek_stream_index < 0 ||
2078  pls->seek_stream_index == pls->pkt.stream_index) {
2079 
2080  if (pls->pkt.dts == AV_NOPTS_VALUE) {
2082  break;
2083  }
2084 
2085  tb = get_timebase(pls);
2086  ts_diff = av_rescale_rnd(pls->pkt.dts, AV_TIME_BASE,
2087  tb.den, AV_ROUND_DOWN) -
2088  pls->seek_timestamp;
2089  if (ts_diff >= 0 && (pls->seek_flags & AVSEEK_FLAG_ANY ||
2090  pls->pkt.flags & AV_PKT_FLAG_KEY)) {
2092  break;
2093  }
2094  }
2095  av_packet_unref(&pls->pkt);
2096  reset_packet(&pls->pkt);
2097  }
2098  }
2099  /* Check if this stream has the packet with the lowest dts */
2100  if (pls->pkt.data) {
2101  struct playlist *minpls = minplaylist < 0 ?
2102  NULL : c->playlists[minplaylist];
2103  if (minplaylist < 0) {
2104  minplaylist = i;
2105  } else {
2106  int64_t dts = pls->pkt.dts;
2107  int64_t mindts = minpls->pkt.dts;
2108 
2109  if (dts == AV_NOPTS_VALUE ||
2110  (mindts != AV_NOPTS_VALUE && compare_ts_with_wrapdetect(dts, pls, mindts, minpls) < 0))
2111  minplaylist = i;
2112  }
2113  }
2114  }
2115 
2116  /* If we got a packet, return it */
2117  if (minplaylist >= 0) {
2118  struct playlist *pls = c->playlists[minplaylist];
2119  AVStream *ist;
2120  AVStream *st;
2121 
2122  ret = update_streams_from_subdemuxer(s, pls);
2123  if (ret < 0) {
2124  av_packet_unref(&pls->pkt);
2125  reset_packet(&pls->pkt);
2126  return ret;
2127  }
2128 
2129  // If sub-demuxer reports updated metadata, copy it to the first stream
2130  // and set its AVSTREAM_EVENT_FLAG_METADATA_UPDATED flag.
2132  if (pls->n_main_streams) {
2133  st = pls->main_streams[0];
2134  av_dict_copy(&st->metadata, pls->ctx->metadata, 0);
2136  }
2138  }
2139 
2140  /* check if noheader flag has been cleared by the subdemuxer */
2141  if (pls->has_noheader_flag && !(pls->ctx->ctx_flags & AVFMTCTX_NOHEADER)) {
2142  pls->has_noheader_flag = 0;
2144  }
2145 
2146  if (pls->pkt.stream_index >= pls->n_main_streams) {
2147  av_log(s, AV_LOG_ERROR, "stream index inconsistency: index %d, %d main streams, %d subdemuxer streams\n",
2148  pls->pkt.stream_index, pls->n_main_streams, pls->ctx->nb_streams);
2149  av_packet_unref(&pls->pkt);
2150  reset_packet(&pls->pkt);
2151  return AVERROR_BUG;
2152  }
2153 
2154  ist = pls->ctx->streams[pls->pkt.stream_index];
2155  st = pls->main_streams[pls->pkt.stream_index];
2156 
2157  *pkt = pls->pkt;
2158  pkt->stream_index = st->index;
2159  reset_packet(&c->playlists[minplaylist]->pkt);
2160 
2161  if (pkt->dts != AV_NOPTS_VALUE)
2162  c->cur_timestamp = av_rescale_q(pkt->dts,
2163  ist->time_base,
2164  AV_TIME_BASE_Q);
2165 
2166  /* There may be more situations where this would be useful, but this at least
2167  * handles newly probed codecs properly (i.e. request_probe by mpegts). */
2168  if (ist->codecpar->codec_id != st->codecpar->codec_id) {
2169  ret = set_stream_info_from_input_stream(st, pls, ist);
2170  if (ret < 0) {
2171  av_packet_unref(pkt);
2172  return ret;
2173  }
2174  }
2175 
2176  return 0;
2177  }
2178  return AVERROR_EOF;
2179 }
2180 
2181 static int hls_read_seek(AVFormatContext *s, int stream_index,
2182  int64_t timestamp, int flags)
2183 {
2184  HLSContext *c = s->priv_data;
2185  struct playlist *seek_pls = NULL;
2186  int i, seq_no;
2187  int j;
2188  int stream_subdemuxer_index;
2189  int64_t first_timestamp, seek_timestamp, duration;
2190 
2191  if ((flags & AVSEEK_FLAG_BYTE) || (c->ctx->ctx_flags & AVFMTCTX_UNSEEKABLE))
2192  return AVERROR(ENOSYS);
2193 
2194  first_timestamp = c->first_timestamp == AV_NOPTS_VALUE ?
2195  0 : c->first_timestamp;
2196 
2197  seek_timestamp = av_rescale_rnd(timestamp, AV_TIME_BASE,
2198  s->streams[stream_index]->time_base.den,
2199  flags & AVSEEK_FLAG_BACKWARD ?
2201 
2202  duration = s->duration == AV_NOPTS_VALUE ?
2203  0 : s->duration;
2204 
2205  if (0 < duration && duration < seek_timestamp - first_timestamp)
2206  return AVERROR(EIO);
2207 
2208  /* find the playlist with the specified stream */
2209  for (i = 0; i < c->n_playlists; i++) {
2210  struct playlist *pls = c->playlists[i];
2211  for (j = 0; j < pls->n_main_streams; j++) {
2212  if (pls->main_streams[j] == s->streams[stream_index]) {
2213  seek_pls = pls;
2214  stream_subdemuxer_index = j;
2215  break;
2216  }
2217  }
2218  }
2219  /* check if the timestamp is valid for the playlist with the
2220  * specified stream index */
2221  if (!seek_pls || !find_timestamp_in_playlist(c, seek_pls, seek_timestamp, &seq_no))
2222  return AVERROR(EIO);
2223 
2224  /* set segment now so we do not need to search again below */
2225  seek_pls->cur_seq_no = seq_no;
2226  seek_pls->seek_stream_index = stream_subdemuxer_index;
2227 
2228  for (i = 0; i < c->n_playlists; i++) {
2229  /* Reset reading */
2230  struct playlist *pls = c->playlists[i];
2231  if (pls->input)
2232  ff_format_io_close(pls->parent, &pls->input);
2233  pls->input_read_done = 0;
2234  if (pls->input_next)
2235  ff_format_io_close(pls->parent, &pls->input_next);
2236  pls->input_next_requested = 0;
2237  av_packet_unref(&pls->pkt);
2238  reset_packet(&pls->pkt);
2239  pls->pb.eof_reached = 0;
2240  /* Clear any buffered data */
2241  pls->pb.buf_end = pls->pb.buf_ptr = pls->pb.buffer;
2242  /* Reset the pos, to let the mpegts demuxer know we've seeked. */
2243  pls->pb.pos = 0;
2244  /* Flush the packet queue of the subdemuxer. */
2245  ff_read_frame_flush(pls->ctx);
2246 
2248  pls->seek_flags = flags;
2249 
2250  if (pls != seek_pls) {
2251  /* set closest segment seq_no for playlists not handled above */
2252  find_timestamp_in_playlist(c, pls, seek_timestamp, &pls->cur_seq_no);
2253  /* seek the playlist to the given position without taking
2254  * keyframes into account since this playlist does not have the
2255  * specified stream where we should look for the keyframes */
2256  pls->seek_stream_index = -1;
2257  pls->seek_flags |= AVSEEK_FLAG_ANY;
2258  }
2259  }
2260 
2262 
2263  return 0;
2264 }
2265 
2266 static int hls_probe(AVProbeData *p)
2267 {
2268  /* Require #EXTM3U at the start, and either one of the ones below
2269  * somewhere for a proper match. */
2270  if (strncmp(p->buf, "#EXTM3U", 7))
2271  return 0;
2272 
2273  if (strstr(p->buf, "#EXT-X-STREAM-INF:") ||
2274  strstr(p->buf, "#EXT-X-TARGETDURATION:") ||
2275  strstr(p->buf, "#EXT-X-MEDIA-SEQUENCE:"))
2276  return AVPROBE_SCORE_MAX;
2277  return 0;
2278 }
2279 
2280 #define OFFSET(x) offsetof(HLSContext, x)
2281 #define FLAGS AV_OPT_FLAG_DECODING_PARAM
2282 static const AVOption hls_options[] = {
2283  {"live_start_index", "segment index to start live streams at (negative values are from the end)",
2284  OFFSET(live_start_index), AV_OPT_TYPE_INT, {.i64 = -3}, INT_MIN, INT_MAX, FLAGS},
2285  {"allowed_extensions", "List of file extensions that hls is allowed to access",
2286  OFFSET(allowed_extensions), AV_OPT_TYPE_STRING,
2287  {.str = "3gp,aac,avi,flac,mkv,m3u8,m4a,m4s,m4v,mpg,mov,mp2,mp3,mp4,mpeg,mpegts,ogg,ogv,oga,ts,vob,wav"},
2288  INT_MIN, INT_MAX, FLAGS},
2289  {"max_reload", "Maximum number of times a insufficient list is attempted to be reloaded",
2290  OFFSET(max_reload), AV_OPT_TYPE_INT, {.i64 = 1000}, 0, INT_MAX, FLAGS},
2291  {"http_persistent", "Use persistent HTTP connections",
2292  OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS },
2293  {"http_multiple", "Use multiple HTTP connections for fetching segments",
2294  OFFSET(http_multiple), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, FLAGS},
2295  {NULL}
2296 };
2297 
2298 static const AVClass hls_class = {
2299  .class_name = "hls,applehttp",
2300  .item_name = av_default_item_name,
2301  .option = hls_options,
2302  .version = LIBAVUTIL_VERSION_INT,
2303 };
2304 
2306  .name = "hls,applehttp",
2307  .long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
2308  .priv_class = &hls_class,
2309  .priv_data_size = sizeof(HLSContext),
2311  .read_probe = hls_probe,
2314  .read_close = hls_close,
2316 };
#define FF_COMPLIANCE_EXPERIMENTAL
Allow nonstandardized experimental things.
Definition: avcodec.h:2581
#define AVSEEK_FLAG_BACKWARD
Definition: avformat.h:2502
uint8_t key[16]
Definition: hls.c:131
#define NULL
Definition: coverity.c:32
static int update_init_section(struct playlist *pls, struct segment *seg)
Definition: hls.c:1243
int needed
Definition: hls.c:118
struct segment * init_section
Definition: hls.c:77
void ff_make_absolute_url(char *buf, int size, const char *base, const char *rel)
Convert a relative url into an absolute url, given a base url.
Definition: url.c:80
void * data
Definition: id3v2.h:59
Bytestream IO Context.
Definition: avio.h:161
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:336
int bandwidth
Definition: hls.c:178
static int read_from_url(struct playlist *pls, struct segment *seg, uint8_t *buf, int buf_size)
Definition: hls.c:942
#define AVSTREAM_EVENT_FLAG_METADATA_UPDATED
The call resulted in updated metadata.
Definition: avformat.h:988
Definition: hls.c:93
char assoc_language[MAX_FIELD_LEN]
Definition: hls.c:453
int strict_std_compliance
Definition: hls.c:206
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1627
AVDictionary * id3_initial
Definition: hls.c:140
AVOption.
Definition: opt.h:246
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:350
static int set_stream_info_from_input_stream(AVStream *st, struct playlist *pls, AVStream *ist)
Definition: hls.c:1680
struct segment ** init_sections
Definition: hls.c:159
static void handle_init_section_args(struct init_section_info *info, const char *key, int key_len, char **dest, int *dest_len)
Definition: hls.c:436
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
unsigned int id3_buf_size
Definition: hls.c:139
ID3v2ExtraMeta * id3_deferred_extra
Definition: hls.c:143
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
unsigned char * buf_ptr
Current position in the buffer.
Definition: avio.h:228
unsigned char * buf_end
End of the data, may be less than buffer+buffer_size if the read function returned less data than req...
Definition: avio.h:229
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:4827
int ff_copy_whiteblacklists(AVFormatContext *dst, const AVFormatContext *src)
Copies the whilelists from one context to the other.
Definition: utils.c:164
#define AVSEEK_FLAG_ANY
seek to any frame, even non-keyframes
Definition: avformat.h:2504
int event_flags
Flags for the user to detect events happening on the stream.
Definition: avformat.h:987
char forced[4]
Definition: hls.c:456
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:460
static int64_t default_reload_interval(struct playlist *pls)
Definition: hls.c:1300
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3884
int disposition
Definition: hls.c:174
unsigned int init_sec_data_len
Definition: hls.c:127
int num
Numerator.
Definition: rational.h:59
int index
stream index in AVFormatContext
Definition: avformat.h:875
int size
Definition: avcodec.h:1431
#define ID3v2_DEFAULT_MAGIC
Default magic bytes for ID3v2 header: "ID3".
Definition: id3v2.h:35
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:246
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
#define AVIO_FLAG_READ
read-only
Definition: avio.h:654
char language[MAX_FIELD_LEN]
Definition: hls.c:452
unsigned char * buffer
Start of the buffer.
Definition: avio.h:226
int has_noheader_flag
Definition: hls.c:105
int event_flags
Flags for the user to detect events happening on the file.
Definition: avformat.h:1664
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:217
#define AV_DISPOSITION_HEARING_IMPAIRED
stream for hearing impaired audiences
Definition: avformat.h:832
static void fill_buf(uint8_t *data, int w, int h, int linesize, uint8_t v)
char * key
Definition: hls.c:73
const char * key
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
int av_usleep(unsigned usec)
Sleep for a period of time.
Definition: time.c:84
discard all
Definition: avcodec.h:794
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:538
#define MAX_CHARACTERISTICS_LEN
Definition: hls.c:45
int ctx_flags
Flags signalling stream properties.
Definition: avformat.h:1400
int ff_id3v2_parse_apic(AVFormatContext *s, ID3v2ExtraMeta **extra_meta)
Create a stream for each APIC (attached picture) extracted from the ID3v2 header. ...
Definition: id3v2.c:1140
static void reset_packet(AVPacket *pkt)
Definition: hls.c:298
int strict_std_compliance
Allow non-standard and experimental extension.
Definition: avformat.h:1657
char * url
Definition: hls.c:72
int64_t url_offset
Definition: hls.c:70
static int id3_has_changed_values(struct playlist *pls, AVDictionary *metadata, ID3v2ExtraMetaAPIC *apic)
Definition: hls.c:985
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:375
void ff_read_frame_flush(AVFormatContext *s)
Flush the frame reader.
Definition: utils.c:1917
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
unsigned int init_sec_buf_read_offset
Definition: hls.c:128
Public dictionary API.
char type[16]
Definition: hls.c:449
int n_renditions
Definition: hls.c:196
#define ID3v2_HEADER_SIZE
Definition: id3v2.h:30
#define MPEG_TIME_BASE_Q
Definition: hls.c:48
enum AVMediaType type
Definition: hls.c:169
uint8_t iv[16]
Definition: hls.c:75
char defaultr[4]
Definition: hls.c:455
uint8_t
Round toward +infinity.
Definition: mathematics.h:83
int http_multiple
Definition: hls.c:210
int n_variants
Definition: hls.c:192
#define FLAGS
Definition: hls.c:2281
#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:451
int64_t cur_seg_offset
Definition: hls.c:120
char audio[MAX_FIELD_LEN]
Definition: hls.c:324
static void free_rendition_list(HLSContext *c)
Definition: hls.c:285
#define AVFMTCTX_UNSEEKABLE
signal that the stream is definitely not seekable, and attempts to call the seek function will fail...
Definition: avformat.h:1298
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1448
static struct segment * next_segment(struct playlist *pls)
Definition: hls.c:934
int id
Format-specific stream ID.
Definition: avformat.h:881
uint8_t * read_buffer
Definition: hls.c:96
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5615
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:1056
static struct playlist * new_playlist(HLSContext *c, const char *url, const char *base)
Definition: hls.c:304
AVInputFormat ff_hls_demuxer
Definition: hls.c:2305
int ff_id3v2_parse_priv_dict(AVDictionary **metadata, ID3v2ExtraMeta **extra_meta)
Parse PRIV tags into a dictionary.
Definition: id3v2.c:1231
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4456
int finished
Definition: hls.c:112
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1419
int64_t duration
Definition: movenc.c:63
static void handle_id3(AVIOContext *pb, struct playlist *pls)
Definition: hls.c:1014
int n_playlists
Definition: hls.c:194
AVFormatContext * avformat_alloc_context(void)
Allocate an AVFormatContext.
Definition: options.c:144
#define AVERROR_PROTOCOL_NOT_FOUND
Protocol not found.
Definition: error.h:63
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:40
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1482
uint8_t * data
Definition: avcodec.h:1430
AVProgram * av_new_program(AVFormatContext *s, int id)
Definition: utils.c:4555
static int read_data(void *opaque, uint8_t *buf, int buf_size)
Definition: hls.c:1353
#define AVERROR_EOF
End of file.
Definition: error.h:55
unsigned int init_sec_buf_size
Definition: hls.c:126
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
int input_next_requested
Definition: hls.c:100
int av_match_ext(const char *filename, const char *extensions)
Return a positive value if the given filename has one of the given extensions, 0 otherwise.
Definition: format.c:38
ptrdiff_t size
Definition: opengl_enc.c:101
struct rendition ** renditions
Definition: hls.c:154
static int open_url_keepalive(AVFormatContext *s, AVIOContext **pb, const char *url)
Definition: hls.c:592
#define flags(name, subs,...)
Definition: cbs_h2645.c:263
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:1525
unsigned int * stream_index
Definition: avformat.h:1272
#define av_log(a,...)
static void free_playlist_list(HLSContext *c)
Definition: hls.c:242
struct rendition ** renditions
Definition: hls.c:197
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:648
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1462
struct variant ** variants
Definition: hls.c:193
static void free_segment_dynarray(struct segment **segments, int n_segments)
Definition: hls.c:214
static AVRational get_timebase(struct playlist *pls)
Definition: hls.c:2022
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
Callback for checking whether to abort blocking functions.
Definition: avio.h:58
int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt, const char *url, void *logctx, unsigned int offset, unsigned int max_probe_size)
Like av_probe_input_buffer2() but returns 0 on success.
Definition: format.c:312
AVIOContext * playlist_pb
Definition: hls.c:211
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
Definition: utils.c:2003
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:2030
#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:1589
char video_group[MAX_FIELD_LEN]
Definition: hls.c:185
int64_t cur_timestamp
Definition: hls.c:203
int n_renditions
Definition: hls.c:153
static const AVClass hls_class
Definition: hls.c:2298
AVIOInterruptCB * interrupt_callback
Definition: hls.c:204
char bandwidth[20]
Definition: hls.c:322
static void handle_key_args(struct key_info *info, const char *key, int key_len, char **dest, int *dest_len)
Definition: hls.c:379
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
char * url
input or output URL.
Definition: avformat.h:1447
const char * r
Definition: vf_curves.c:111
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
unsigned int nb_programs
Definition: avformat.h:1528
char byterange[32]
Definition: hls.c:396
int64_t id3_mpegts_timestamp
Definition: hls.c:136
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:203
static void free_segment_list(struct playlist *pls)
Definition: hls.c:224
int ff_id3v2_parse_priv(AVFormatContext *s, ID3v2ExtraMeta **extra_meta)
Add metadata for all PRIV tags in the ID3v2 header.
Definition: id3v2.c:1273
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3880
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:1699
int first_packet
Definition: hls.c:201
static int find_timestamp_in_playlist(HLSContext *c, struct playlist *pls, int64_t timestamp, int *seq_no)
Definition: hls.c:1557
uint8_t * data
Definition: id3v2.h:80
int64_t id3_offset
Definition: hls.c:137
int is_id3_timestamped
Definition: hls.c:135
New fields can be added to the end with minor version bumps.
Definition: avformat.h:1268
#define FFMAX(a, b)
Definition: common.h:94
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:83
#define fail()
Definition: checkasm.h:117
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1436
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:488
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:450
int live_start_index
Definition: hls.c:200
Definition: hls.c:68
#define AV_DISPOSITION_FORCED
Track should be used during playback by default.
Definition: avformat.h:831
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1407
AVDictionary * opts
Definition: movenc.c:50
char group_id[MAX_FIELD_LEN]
Definition: hls.c:171
static struct segment * current_segment(struct playlist *pls)
Definition: hls.c:929
int n_main_streams
Definition: hls.c:110
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:260
#define dynarray_add(tab, nb_ptr, elem)
Definition: internal.h:198
static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **opts)
Definition: hls.c:1644
#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
#define AV_OPT_SEARCH_CHILDREN
Search in possible children of the given object first.
Definition: opt.h:556
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that's been allocated with av_malloc() or another memory allocation functio...
Definition: dict.h:76
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
char * allowed_extensions
Definition: hls.c:207
int index
Definition: hls.c:102
AVIOContext * input_next
Definition: hls.c:99
static void add_renditions_to_variant(HLSContext *c, struct variant *var, enum AVMediaType type, const char *group_id)
Definition: hls.c:1501
uint8_t * init_sec_buf
Definition: hls.c:125
#define av_err2str(errnum)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: error.h:119
static int hls_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: hls.c:2039
uint8_t * id3_buf
Definition: hls.c:138
#define AVFMT_EVENT_FLAG_METADATA_UPDATED
The call resulted in updated metadata.
Definition: avformat.h:1665
Definition: hls.c:373
#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:399
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:464
int n
Definition: avisynth_c.h:684
AVDictionary * metadata
Definition: avformat.h:938
static struct variant * new_variant(HLSContext *c, struct variant_info *info, const char *url, const char *base)
Definition: hls.c:329
#define AVFMT_FLAG_CUSTOM_IO
The caller has supplied a custom AVIOContext, don'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:1997
struct segment ** segments
Definition: hls.c:117
#define AVERROR_EXIT
Immediate exit was requested; the called function should not be restarted.
Definition: error.h:56
int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding rnd)
Rescale a 64-bit integer with specified rounding.
Definition: mathematics.c:58
AVPacket pkt
Definition: hls.c:104
uint8_t * owner
Definition: id3v2.h:79
int input_read_done
Definition: hls.c:98
char subtitles_group[MAX_FIELD_LEN]
Definition: hls.c:186
char name[MAX_FIELD_LEN]
Definition: hls.c:454
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:530
#define AV_DISPOSITION_VISUAL_IMPAIRED
stream for visual impaired audiences
Definition: avformat.h:833
int64_t size
Definition: hls.c:71
enum KeyType key_type
Definition: hls.c:74
Stream structure.
Definition: avformat.h:874
int id3_changed
Definition: hls.c:142
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
int avformat_queue_attached_pictures(AVFormatContext *s)
Definition: utils.c:479
AVFormatContext * parent
Definition: hls.c:101
AVFormatContext * ctx
Definition: hls.c:191
static void parse_id3(AVFormatContext *s, AVIOContext *pb, AVDictionary **metadata, int64_t *dts, ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta **extra_meta)
Definition: hls.c:959
#define AV_DISPOSITION_DEFAULT
Definition: avformat.h:819
int64_t first_timestamp
Definition: hls.c:202
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:251
char subtitles[MAX_FIELD_LEN]
Definition: hls.c:326
AVStreamInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1231
struct ID3v2ExtraMeta * next
Definition: id3v2.h:60
int ff_check_interrupt(AVIOInterruptCB *cb)
Check if the user has requested to interrupt a blocking function associated with cb.
Definition: avio.c:664
enum PlaylistType type
Definition: hls.c:113
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
AVIOContext * pb
I/O context.
Definition: avformat.h:1393
static int parse_playlist(HLSContext *c, const char *url, struct playlist *pls, AVIOContext *in)
Definition: hls.c:687
char url[MAX_URL_SIZE]
Definition: hlsproto.c:55
int n_init_sections
Definition: hls.c:158
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:592
uint8_t * data
The data buffer.
Definition: buffer.h:89
static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url, AVDictionary *opts, AVDictionary *opts2, int *is_http_out)
Definition: hls.c:610
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;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);returnNULL;}returnac;}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;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->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);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> in
#define AVFMT_NOGENSEARCH
Format does not allow to fall back on generic search.
Definition: avformat.h:476
static const AVOption hls_options[]
Definition: hls.c:2282
static int hls_read_header(AVFormatContext *s)
Definition: hls.c:1759
void * buf
Definition: avisynth_c.h:690
Definition: url.h:38
int max_reload
Definition: hls.c:208
GLint GLenum type
Definition: opengl_enc.c:105
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:70
struct playlist ** playlists
Definition: hls.c:195
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:50
static int open_input(HLSContext *c, struct playlist *pls, struct segment *seg, AVIOContext **in)
Definition: hls.c:1156
int64_t last_load_time
Definition: hls.c:121
Describe the class of an AVClass context structure.
Definition: log.h:67
static void update_noheader_flag(AVFormatContext *s)
Definition: hls.c:1724
#define AV_WB32(p, v)
Definition: intreadwrite.h:419
AVIOContext * input
Definition: hls.c:97
Rational number (pair of numerator and denominator).
Definition: rational.h:58
struct segment * cur_init_section
Definition: hls.c:124
int seek_stream_index
Definition: hls.c:147
PlaylistType
Definition: hls.c:82
int64_t target_duration
Definition: hls.c:114
static int save_avio_options(AVFormatContext *s)
Definition: hls.c:1622
#define AV_OPT_ALLOW_NULL
In av_opt_get, return NULL if the option has a pointer type and is set to NULL, rather than returning...
Definition: opt.h:571
#define AVSEEK_FLAG_BYTE
seeking based on position in bytes
Definition: avformat.h:2503
int need_context_update
Whether the internal avctx needs to be updated from codecpar (after a late change to codecpar) ...
Definition: internal.h:192
char uri[MAX_URL_SIZE]
Definition: hls.c:450
AVMediaType
Definition: avutil.h:199
int n_playlists
Definition: hls.c:181
struct playlist * playlist
Definition: hls.c:170
static void add_stream_to_programs(AVFormatContext *s, struct playlist *pls, AVStream *stream)
Definition: hls.c:1654
#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:4390
This structure contains the data a format has to probe a file.
Definition: avformat.h:448
int ff_hex_to_data(uint8_t *data, const char *p)
Parse a string of hexadecimal strings.
Definition: utils.c:4799
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1767
Definition: hls.c:168
Round toward -infinity.
Definition: mathematics.h:82
static void handle_variant_args(struct variant_info *info, const char *key, int key_len, char **dest, int *dest_len)
Definition: hls.c:355
const char * avio_find_protocol_name(const char *url)
Return the name of the protocol that will handle the passed URL.
Definition: avio.c:473
int size
Size of data in bytes.
Definition: buffer.h:93
URLContext * ffio_geturlcontext(AVIOContext *s)
Return the URLContext associated with the AVIOContext.
Definition: aviobuf.c:1039
AVDictionary * metadata
Definition: avformat.h:1274
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
char audio_group[MAX_FIELD_LEN]
Definition: hls.c:184
int64_t av_gettime_relative(void)
Get the current time in microseconds since some unspecified starting point.
Definition: time.c:56
KeyType
Definition: hls.c:62
static int recheck_discard_flags(AVFormatContext *s, int first)
Definition: hls.c:1958
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:4857
int ff_http_do_new_request(URLContext *h, const char *uri)
Send a new HTTP request, reusing the old connection.
Definition: http.c:307
int64_t seek_timestamp
Definition: hls.c:145
char iv[35]
Definition: hls.c:376
#define OFFSET(x)
Definition: hls.c:2280
char characteristics[MAX_CHARACTERISTICS_LEN]
Definition: hls.c:457
int seek_flags
Definition: hls.c:146
char * av_strtok(char *s, const char *delim, char **saveptr)
Split the string into several tokens which can be accessed by successive calls to av_strtok()...
Definition: avstring.c:184
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:460
int av_strstart(const char *str, const char *pfx, const char **ptr)
Return non-zero if pfx is a prefix of str.
Definition: avstring.c:34
char language[MAX_FIELD_LEN]
Definition: hls.c:172
AVIOContext pb
Definition: hls.c:95
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_RB64
Definition: bytestream.h:87
Main libavformat public API header.
char uri[MAX_URL_SIZE]
Definition: hls.c:374
#define INITIAL_BUFFER_SIZE
Definition: hls.c:42
int ff_id3v2_match(const uint8_t *buf, const char *magic)
Detect ID3v2 Header.
Definition: id3v2.c:142
int ffio_init_context(AVIOContext *s, unsigned char *buffer, int buffer_size, int write_flag, void *opaque, int(*read_packet)(void *opaque, uint8_t *buf, int buf_size), int(*write_packet)(void *opaque, uint8_t *buf, int buf_size), int64_t(*seek)(void *opaque, int64_t offset, int whence))
Definition: aviobuf.c:81
#define MAX_FIELD_LEN
Definition: hls.c:44
static int playlist_needed(struct playlist *pls)
Definition: hls.c:1307
int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
Read packets of a media file to get stream information.
Definition: utils.c:3565
const char * tag
Definition: id3v2.h:58
static double c[64]
int cur_seq_no
Definition: hls.c:199
int av_dict_set_int(AVDictionary **pm, const char *key, int64_t value, int flags)
Convenience wrapper for av_dict_set that converts the value to a string and stores it...
Definition: dict.c:147
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:927
int64_t pos
position in the file of the current buffer
Definition: avio.h:238
int pts_wrap_bits
number of bits in pts (used for wrapping control)
Definition: avformat.h:1066
AVDictionary * avio_opts
Definition: hls.c:205
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:33
char * key
Definition: dict.h:86
int n_segments
Definition: hls.c:116
int den
Denominator.
Definition: rational.h:60
void avformat_close_input(AVFormatContext **s)
Close an opened input AVFormatContext.
Definition: utils.c:4428
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:773
int http_persistent
Definition: hls.c:209
static int hls_probe(AVProbeData *p)
Definition: hls.c:2266
static int ensure_playlist(HLSContext *c, struct playlist **pls, const char *url)
Definition: hls.c:582
static int hls_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: hls.c:2181
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:754
#define av_free(p)
int id3_found
Definition: hls.c:141
char name[MAX_FIELD_LEN]
Definition: hls.c:173
void ff_id3v2_read_dict(AVIOContext *pb, AVDictionary **metadata, const char *magic, ID3v2ExtraMeta **extra_meta)
Read an ID3v2 tag into specified dictionary and retrieve supported extra metadata.
Definition: id3v2.c:1112
char * value
Definition: dict.h:87
int eof_reached
true if eof reached
Definition: avio.h:239
int len
int ff_id3v2_tag_len(const uint8_t *buf)
Get the length of an ID3v2 tag.
Definition: id3v2.c:155
void * priv_data
Format private data.
Definition: avformat.h:1379
AVBufferRef * buf
Definition: id3v2.h:72
AVFormatContext * ctx
Definition: hls.c:103
uint32_t datasize
Definition: id3v2.h:81
int avformat_open_input(AVFormatContext **ps, const char *url, AVInputFormat *fmt, AVDictionary **options)
Open an input stream and read the header.
Definition: utils.c:537
struct playlist ** playlists
Definition: hls.c:182
Definition: hls.c:177
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1429
char video[MAX_FIELD_LEN]
Definition: hls.c:325
int64_t duration
Duration of the stream, in AV_TIME_BASE fractional seconds.
Definition: avformat.h:1466
#define av_freep(p)
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:647
#define AV_DICT_IGNORE_SUFFIX
Return first entry in a dictionary whose first part corresponds to the search key, ignoring the suffix of the found key string.
Definition: dict.h:70
char uri[MAX_URL_SIZE]
Definition: hls.c:395
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1021
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:358
#define FFSWAP(type, a, b)
Definition: common.h:99
int start_seq_no
Definition: hls.c:115
int stream_index
Definition: avcodec.h:1432
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:903
static void free_init_section_list(struct playlist *pls)
Definition: hls.c:231
int64_t duration
Definition: hls.c:69
static void free_variant_list(HLSContext *c)
Definition: hls.c:273
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:826
int cur_seq_no
Definition: hls.c:119
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:929
char key_url[MAX_URL_SIZE]
Definition: hls.c:130
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:1931
static int hls_close(AVFormatContext *s)
Definition: hls.c:1745
char * ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase)
Definition: utils.c:4778
This structure stores compressed data.
Definition: avcodec.h:1407
Definition: hls.c:63
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1423
AVPacket attached_pic
For streams with AV_DISPOSITION_ATTACHED_PIC disposition, this packet will contain the attached pictu...
Definition: avformat.h:956
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
#define tb
Definition: regdef.h:68
AVProgram ** programs
Definition: avformat.h:1529
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
const char * name
Definition: opengl_enc.c:103
static int select_cur_seq_no(HLSContext *c, struct playlist *pls)
Definition: hls.c:1583
static uint8_t tmp[11]
Definition: aes_ctr.c:26