FFmpeg  4.3
hls.c
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1 /*
2  * Apple HTTP Live Streaming demuxer
3  * Copyright (c) 2010 Martin Storsjo
4  * Copyright (c) 2013 Anssi Hannula
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 /**
24  * @file
25  * Apple HTTP Live Streaming demuxer
26  * http://tools.ietf.org/html/draft-pantos-http-live-streaming
27  */
28 
29 #include "libavformat/http.h"
30 #include "libavutil/avstring.h"
31 #include "libavutil/avassert.h"
32 #include "libavutil/intreadwrite.h"
33 #include "libavutil/mathematics.h"
34 #include "libavutil/opt.h"
35 #include "libavutil/dict.h"
36 #include "libavutil/time.h"
37 #include "avformat.h"
38 #include "internal.h"
39 #include "avio_internal.h"
40 #include "id3v2.h"
41 
42 #define INITIAL_BUFFER_SIZE 32768
43 
44 #define MAX_FIELD_LEN 64
45 #define MAX_CHARACTERISTICS_LEN 512
46 
47 #define MPEG_TIME_BASE 90000
48 #define MPEG_TIME_BASE_Q (AVRational){1, MPEG_TIME_BASE}
49 
50 /*
51  * An apple http stream consists of a playlist with media segment files,
52  * played sequentially. There may be several playlists with the same
53  * video content, in different bandwidth variants, that are played in
54  * parallel (preferably only one bandwidth variant at a time). In this case,
55  * the user supplied the url to a main playlist that only lists the variant
56  * playlists.
57  *
58  * If the main playlist doesn't point at any variants, we still create
59  * one anonymous toplevel variant for this, to maintain the structure.
60  */
61 
62 enum KeyType {
66 };
67 
68 struct segment {
69  int64_t duration;
70  int64_t url_offset;
71  int64_t size;
72  char *url;
73  char *key;
75  uint8_t iv[16];
76  /* associated Media Initialization Section, treated as a segment */
78 };
79 
80 struct rendition;
81 
86 };
87 
88 /*
89  * Each playlist has its own demuxer. If it currently is active,
90  * it has an open AVIOContext too, and potentially an AVPacket
91  * containing the next packet from this stream.
92  */
93 struct playlist {
102  int index;
106 
107  /* main demuxer streams associated with this playlist
108  * indexed by the subdemuxer stream indexes */
111 
112  int finished;
117  struct segment **segments;
118  int needed;
119  int broken;
123  int64_t cur_seg_offset;
124  int64_t last_load_time;
125 
126  /* Currently active Media Initialization Section */
129  unsigned int init_sec_buf_size;
130  unsigned int init_sec_data_len;
132 
133  char key_url[MAX_URL_SIZE];
135 
136  /* ID3 timestamp handling (elementary audio streams have ID3 timestamps
137  * (and possibly other ID3 tags) in the beginning of each segment) */
138  int is_id3_timestamped; /* -1: not yet known */
139  int64_t id3_mpegts_timestamp; /* in mpegts tb */
140  int64_t id3_offset; /* in stream original tb */
141  uint8_t* id3_buf; /* temp buffer for id3 parsing */
142  unsigned int id3_buf_size;
143  AVDictionary *id3_initial; /* data from first id3 tag */
144  int id3_found; /* ID3 tag found at some point */
145  int id3_changed; /* ID3 tag data has changed at some point */
146  ID3v2ExtraMeta *id3_deferred_extra; /* stored here until subdemuxer is opened */
147 
148  int64_t seek_timestamp;
150  int seek_stream_index; /* into subdemuxer stream array */
151 
152  /* Renditions associated with this playlist, if any.
153  * Alternative rendition playlists have a single rendition associated
154  * with them, and variant main Media Playlists may have
155  * multiple (playlist-less) renditions associated with them. */
158 
159  /* Media Initialization Sections (EXT-X-MAP) associated with this
160  * playlist, if any. */
163 };
164 
165 /*
166  * Renditions are e.g. alternative subtitle or audio streams.
167  * The rendition may either be an external playlist or it may be
168  * contained in the main Media Playlist of the variant (in which case
169  * playlist is NULL).
170  */
171 struct rendition {
174  char group_id[MAX_FIELD_LEN];
175  char language[MAX_FIELD_LEN];
178 };
179 
180 struct variant {
182 
183  /* every variant contains at least the main Media Playlist in index 0 */
185  struct playlist **playlists;
186 
187  char audio_group[MAX_FIELD_LEN];
188  char video_group[MAX_FIELD_LEN];
189  char subtitles_group[MAX_FIELD_LEN];
190 };
191 
192 typedef struct HLSContext {
193  AVClass *class;
196  struct variant **variants;
198  struct playlist **playlists;
201 
207  int64_t cur_timestamp;
216 } HLSContext;
217 
218 static void free_segment_dynarray(struct segment **segments, int n_segments)
219 {
220  int i;
221  for (i = 0; i < n_segments; i++) {
222  av_freep(&segments[i]->key);
223  av_freep(&segments[i]->url);
224  av_freep(&segments[i]);
225  }
226 }
227 
228 static void free_segment_list(struct playlist *pls)
229 {
231  av_freep(&pls->segments);
232  pls->n_segments = 0;
233 }
234 
235 static void free_init_section_list(struct playlist *pls)
236 {
237  int i;
238  for (i = 0; i < pls->n_init_sections; i++) {
239  av_freep(&pls->init_sections[i]->url);
240  av_freep(&pls->init_sections[i]);
241  }
242  av_freep(&pls->init_sections);
243  pls->n_init_sections = 0;
244 }
245 
247 {
248  int i;
249  for (i = 0; i < c->n_playlists; i++) {
250  struct playlist *pls = c->playlists[i];
251  free_segment_list(pls);
253  av_freep(&pls->main_streams);
254  av_freep(&pls->renditions);
255  av_freep(&pls->id3_buf);
256  av_dict_free(&pls->id3_initial);
258  av_freep(&pls->init_sec_buf);
259  av_packet_unref(&pls->pkt);
260  av_freep(&pls->pb.buffer);
261  ff_format_io_close(c->ctx, &pls->input);
262  pls->input_read_done = 0;
263  ff_format_io_close(c->ctx, &pls->input_next);
264  pls->input_next_requested = 0;
265  if (pls->ctx) {
266  pls->ctx->pb = NULL;
267  avformat_close_input(&pls->ctx);
268  }
269  av_free(pls);
270  }
271  av_freep(&c->playlists);
272  c->n_playlists = 0;
273 }
274 
276 {
277  int i;
278  for (i = 0; i < c->n_variants; i++) {
279  struct variant *var = c->variants[i];
280  av_freep(&var->playlists);
281  av_free(var);
282  }
283  av_freep(&c->variants);
284  c->n_variants = 0;
285 }
286 
288 {
289  int i;
290  for (i = 0; i < c->n_renditions; i++)
291  av_freep(&c->renditions[i]);
292  av_freep(&c->renditions);
293  c->n_renditions = 0;
294 }
295 
296 /*
297  * Used to reset a statically allocated AVPacket to a clean state,
298  * containing no data.
299  */
300 static void reset_packet(AVPacket *pkt)
301 {
302  av_init_packet(pkt);
303  pkt->data = NULL;
304 }
305 
306 static struct playlist *new_playlist(HLSContext *c, const char *url,
307  const char *base)
308 {
309  struct playlist *pls = av_mallocz(sizeof(struct playlist));
310  if (!pls)
311  return NULL;
312  reset_packet(&pls->pkt);
313  ff_make_absolute_url(pls->url, sizeof(pls->url), base, url);
314  if (!pls->url[0])
315  return NULL;
317 
318  pls->is_id3_timestamped = -1;
320 
321  dynarray_add(&c->playlists, &c->n_playlists, pls);
322  return pls;
323 }
324 
325 struct variant_info {
326  char bandwidth[20];
327  /* variant group ids: */
328  char audio[MAX_FIELD_LEN];
329  char video[MAX_FIELD_LEN];
330  char subtitles[MAX_FIELD_LEN];
331 };
332 
333 static struct variant *new_variant(HLSContext *c, struct variant_info *info,
334  const char *url, const char *base)
335 {
336  struct variant *var;
337  struct playlist *pls;
338 
339  pls = new_playlist(c, url, base);
340  if (!pls)
341  return NULL;
342 
343  var = av_mallocz(sizeof(struct variant));
344  if (!var)
345  return NULL;
346 
347  if (info) {
348  var->bandwidth = atoi(info->bandwidth);
349  strcpy(var->audio_group, info->audio);
350  strcpy(var->video_group, info->video);
351  strcpy(var->subtitles_group, info->subtitles);
352  }
353 
354  dynarray_add(&c->variants, &c->n_variants, var);
355  dynarray_add(&var->playlists, &var->n_playlists, pls);
356  return var;
357 }
358 
359 static void handle_variant_args(struct variant_info *info, const char *key,
360  int key_len, char **dest, int *dest_len)
361 {
362  if (!strncmp(key, "BANDWIDTH=", key_len)) {
363  *dest = info->bandwidth;
364  *dest_len = sizeof(info->bandwidth);
365  } else if (!strncmp(key, "AUDIO=", key_len)) {
366  *dest = info->audio;
367  *dest_len = sizeof(info->audio);
368  } else if (!strncmp(key, "VIDEO=", key_len)) {
369  *dest = info->video;
370  *dest_len = sizeof(info->video);
371  } else if (!strncmp(key, "SUBTITLES=", key_len)) {
372  *dest = info->subtitles;
373  *dest_len = sizeof(info->subtitles);
374  }
375 }
376 
377 struct key_info {
378  char uri[MAX_URL_SIZE];
379  char method[11];
380  char iv[35];
381 };
382 
383 static void handle_key_args(struct key_info *info, const char *key,
384  int key_len, char **dest, int *dest_len)
385 {
386  if (!strncmp(key, "METHOD=", key_len)) {
387  *dest = info->method;
388  *dest_len = sizeof(info->method);
389  } else if (!strncmp(key, "URI=", key_len)) {
390  *dest = info->uri;
391  *dest_len = sizeof(info->uri);
392  } else if (!strncmp(key, "IV=", key_len)) {
393  *dest = info->iv;
394  *dest_len = sizeof(info->iv);
395  }
396 }
397 
399  char uri[MAX_URL_SIZE];
400  char byterange[32];
401 };
402 
403 static struct segment *new_init_section(struct playlist *pls,
404  struct init_section_info *info,
405  const char *url_base)
406 {
407  struct segment *sec;
408  char tmp_str[MAX_URL_SIZE], *ptr = tmp_str;
409 
410  if (!info->uri[0])
411  return NULL;
412 
413  sec = av_mallocz(sizeof(*sec));
414  if (!sec)
415  return NULL;
416 
417  if (!av_strncasecmp(info->uri, "data:", 5)) {
418  ptr = info->uri;
419  } else {
420  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url_base, info->uri);
421  if (!tmp_str[0]) {
422  av_free(sec);
423  return NULL;
424  }
425  }
426  sec->url = av_strdup(ptr);
427  if (!sec->url) {
428  av_free(sec);
429  return NULL;
430  }
431 
432  if (info->byterange[0]) {
433  sec->size = strtoll(info->byterange, NULL, 10);
434  ptr = strchr(info->byterange, '@');
435  if (ptr)
436  sec->url_offset = strtoll(ptr+1, NULL, 10);
437  } else {
438  /* the entire file is the init section */
439  sec->size = -1;
440  }
441 
442  dynarray_add(&pls->init_sections, &pls->n_init_sections, sec);
443 
444  return sec;
445 }
446 
447 static void handle_init_section_args(struct init_section_info *info, const char *key,
448  int key_len, char **dest, int *dest_len)
449 {
450  if (!strncmp(key, "URI=", key_len)) {
451  *dest = info->uri;
452  *dest_len = sizeof(info->uri);
453  } else if (!strncmp(key, "BYTERANGE=", key_len)) {
454  *dest = info->byterange;
455  *dest_len = sizeof(info->byterange);
456  }
457 }
458 
460  char type[16];
461  char uri[MAX_URL_SIZE];
462  char group_id[MAX_FIELD_LEN];
463  char language[MAX_FIELD_LEN];
464  char assoc_language[MAX_FIELD_LEN];
466  char defaultr[4];
467  char forced[4];
468  char characteristics[MAX_CHARACTERISTICS_LEN];
469 };
470 
471 static struct rendition *new_rendition(HLSContext *c, struct rendition_info *info,
472  const char *url_base)
473 {
474  struct rendition *rend;
476  char *characteristic;
477  char *chr_ptr;
478  char *saveptr;
479 
480  if (!strcmp(info->type, "AUDIO"))
481  type = AVMEDIA_TYPE_AUDIO;
482  else if (!strcmp(info->type, "VIDEO"))
483  type = AVMEDIA_TYPE_VIDEO;
484  else if (!strcmp(info->type, "SUBTITLES"))
485  type = AVMEDIA_TYPE_SUBTITLE;
486  else if (!strcmp(info->type, "CLOSED-CAPTIONS"))
487  /* CLOSED-CAPTIONS is ignored since we do not support CEA-608 CC in
488  * AVC SEI RBSP anyway */
489  return NULL;
490 
491  if (type == AVMEDIA_TYPE_UNKNOWN) {
492  av_log(c->ctx, AV_LOG_WARNING, "Can't support the type: %s\n", info->type);
493  return NULL;
494  }
495 
496  /* URI is mandatory for subtitles as per spec */
497  if (type == AVMEDIA_TYPE_SUBTITLE && !info->uri[0]) {
498  av_log(c->ctx, AV_LOG_ERROR, "The URI tag is REQUIRED for subtitle.\n");
499  return NULL;
500  }
501 
502  /* TODO: handle subtitles (each segment has to parsed separately) */
504  if (type == AVMEDIA_TYPE_SUBTITLE) {
505  av_log(c->ctx, AV_LOG_WARNING, "Can't support the subtitle(uri: %s)\n", info->uri);
506  return NULL;
507  }
508 
509  rend = av_mallocz(sizeof(struct rendition));
510  if (!rend)
511  return NULL;
512 
513  dynarray_add(&c->renditions, &c->n_renditions, rend);
514 
515  rend->type = type;
516  strcpy(rend->group_id, info->group_id);
517  strcpy(rend->language, info->language);
518  strcpy(rend->name, info->name);
519 
520  /* add the playlist if this is an external rendition */
521  if (info->uri[0]) {
522  rend->playlist = new_playlist(c, info->uri, url_base);
523  if (rend->playlist)
525  &rend->playlist->n_renditions, rend);
526  }
527 
528  if (info->assoc_language[0]) {
529  int langlen = strlen(rend->language);
530  if (langlen < sizeof(rend->language) - 3) {
531  rend->language[langlen] = ',';
532  strncpy(rend->language + langlen + 1, info->assoc_language,
533  sizeof(rend->language) - langlen - 2);
534  }
535  }
536 
537  if (!strcmp(info->defaultr, "YES"))
539  if (!strcmp(info->forced, "YES"))
541 
542  chr_ptr = info->characteristics;
543  while ((characteristic = av_strtok(chr_ptr, ",", &saveptr))) {
544  if (!strcmp(characteristic, "public.accessibility.describes-music-and-sound"))
546  else if (!strcmp(characteristic, "public.accessibility.describes-video"))
548 
549  chr_ptr = NULL;
550  }
551 
552  return rend;
553 }
554 
555 static void handle_rendition_args(struct rendition_info *info, const char *key,
556  int key_len, char **dest, int *dest_len)
557 {
558  if (!strncmp(key, "TYPE=", key_len)) {
559  *dest = info->type;
560  *dest_len = sizeof(info->type);
561  } else if (!strncmp(key, "URI=", key_len)) {
562  *dest = info->uri;
563  *dest_len = sizeof(info->uri);
564  } else if (!strncmp(key, "GROUP-ID=", key_len)) {
565  *dest = info->group_id;
566  *dest_len = sizeof(info->group_id);
567  } else if (!strncmp(key, "LANGUAGE=", key_len)) {
568  *dest = info->language;
569  *dest_len = sizeof(info->language);
570  } else if (!strncmp(key, "ASSOC-LANGUAGE=", key_len)) {
571  *dest = info->assoc_language;
572  *dest_len = sizeof(info->assoc_language);
573  } else if (!strncmp(key, "NAME=", key_len)) {
574  *dest = info->name;
575  *dest_len = sizeof(info->name);
576  } else if (!strncmp(key, "DEFAULT=", key_len)) {
577  *dest = info->defaultr;
578  *dest_len = sizeof(info->defaultr);
579  } else if (!strncmp(key, "FORCED=", key_len)) {
580  *dest = info->forced;
581  *dest_len = sizeof(info->forced);
582  } else if (!strncmp(key, "CHARACTERISTICS=", key_len)) {
583  *dest = info->characteristics;
584  *dest_len = sizeof(info->characteristics);
585  }
586  /*
587  * ignored:
588  * - AUTOSELECT: client may autoselect based on e.g. system language
589  * - INSTREAM-ID: EIA-608 closed caption number ("CC1".."CC4")
590  */
591 }
592 
593 /* used by parse_playlist to allocate a new variant+playlist when the
594  * playlist is detected to be a Media Playlist (not Master Playlist)
595  * and we have no parent Master Playlist (parsing of which would have
596  * allocated the variant and playlist already)
597  * *pls == NULL => Master Playlist or parentless Media Playlist
598  * *pls != NULL => parented Media Playlist, playlist+variant allocated */
599 static int ensure_playlist(HLSContext *c, struct playlist **pls, const char *url)
600 {
601  if (*pls)
602  return 0;
603  if (!new_variant(c, NULL, url, NULL))
604  return AVERROR(ENOMEM);
605  *pls = c->playlists[c->n_playlists - 1];
606  return 0;
607 }
608 
610  const char *url, AVDictionary **options)
611 {
612 #if !CONFIG_HTTP_PROTOCOL
614 #else
615  int ret;
616  URLContext *uc = ffio_geturlcontext(*pb);
617  av_assert0(uc);
618  (*pb)->eof_reached = 0;
619  ret = ff_http_do_new_request2(uc, url, options);
620  if (ret < 0) {
621  ff_format_io_close(s, pb);
622  }
623  return ret;
624 #endif
625 }
626 
627 static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url,
628  AVDictionary *opts, AVDictionary *opts2, int *is_http_out)
629 {
630  HLSContext *c = s->priv_data;
631  AVDictionary *tmp = NULL;
632  const char *proto_name = NULL;
633  int ret;
634  int is_http = 0;
635 
636  if (av_strstart(url, "crypto", NULL)) {
637  if (url[6] == '+' || url[6] == ':')
638  proto_name = avio_find_protocol_name(url + 7);
639  } else if (av_strstart(url, "data", NULL)) {
640  if (url[4] == '+' || url[4] == ':')
641  proto_name = avio_find_protocol_name(url + 5);
642  }
643 
644  if (!proto_name)
645  proto_name = avio_find_protocol_name(url);
646 
647  if (!proto_name)
648  return AVERROR_INVALIDDATA;
649 
650  // only http(s) & file are allowed
651  if (av_strstart(proto_name, "file", NULL)) {
652  if (strcmp(c->allowed_extensions, "ALL") && !av_match_ext(url, c->allowed_extensions)) {
653  av_log(s, AV_LOG_ERROR,
654  "Filename extension of \'%s\' is not a common multimedia extension, blocked for security reasons.\n"
655  "If you wish to override this adjust allowed_extensions, you can set it to \'ALL\' to allow all\n",
656  url);
657  return AVERROR_INVALIDDATA;
658  }
659  } else if (av_strstart(proto_name, "http", NULL)) {
660  is_http = 1;
661  } else if (av_strstart(proto_name, "data", NULL)) {
662  ;
663  } else
664  return AVERROR_INVALIDDATA;
665 
666  if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':')
667  ;
668  else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':')
669  ;
670  else if (av_strstart(url, "data", NULL) && !strncmp(proto_name, url + 5, strlen(proto_name)) && url[5 + strlen(proto_name)] == ':')
671  ;
672  else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))
673  return AVERROR_INVALIDDATA;
674 
675  av_dict_copy(&tmp, opts, 0);
676  av_dict_copy(&tmp, opts2, 0);
677 
678  if (is_http && c->http_persistent && *pb) {
679  ret = open_url_keepalive(c->ctx, pb, url, &tmp);
680  if (ret == AVERROR_EXIT) {
681  av_dict_free(&tmp);
682  return ret;
683  } else if (ret < 0) {
684  if (ret != AVERROR_EOF)
686  "keepalive request failed for '%s' with error: '%s' when opening url, retrying with new connection\n",
687  url, av_err2str(ret));
688  ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
689  }
690  } else {
691  ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
692  }
693  if (ret >= 0) {
694  // update cookies on http response with setcookies.
695  char *new_cookies = NULL;
696 
697  if (!(s->flags & AVFMT_FLAG_CUSTOM_IO))
698  av_opt_get(*pb, "cookies", AV_OPT_SEARCH_CHILDREN, (uint8_t**)&new_cookies);
699 
700  if (new_cookies)
701  av_dict_set(&opts, "cookies", new_cookies, AV_DICT_DONT_STRDUP_VAL);
702  }
703 
704  av_dict_free(&tmp);
705 
706  if (is_http_out)
707  *is_http_out = is_http;
708 
709  return ret;
710 }
711 
712 static int parse_playlist(HLSContext *c, const char *url,
713  struct playlist *pls, AVIOContext *in)
714 {
715  int ret = 0, is_segment = 0, is_variant = 0;
716  int64_t duration = 0;
717  enum KeyType key_type = KEY_NONE;
718  uint8_t iv[16] = "";
719  int has_iv = 0;
720  char key[MAX_URL_SIZE] = "";
721  char line[MAX_URL_SIZE];
722  const char *ptr;
723  int close_in = 0;
724  int64_t seg_offset = 0;
725  int64_t seg_size = -1;
726  uint8_t *new_url = NULL;
727  struct variant_info variant_info;
728  char tmp_str[MAX_URL_SIZE];
729  struct segment *cur_init_section = NULL;
730  int is_http = av_strstart(url, "http", NULL);
731  struct segment **prev_segments = NULL;
732  int prev_n_segments = 0;
733  int prev_start_seq_no = -1;
734 
735  if (is_http && !in && c->http_persistent && c->playlist_pb) {
736  in = c->playlist_pb;
737  ret = open_url_keepalive(c->ctx, &c->playlist_pb, url, NULL);
738  if (ret == AVERROR_EXIT) {
739  return ret;
740  } else if (ret < 0) {
741  if (ret != AVERROR_EOF)
743  "keepalive request failed for '%s' with error: '%s' when parsing playlist\n",
744  url, av_err2str(ret));
745  in = NULL;
746  }
747  }
748 
749  if (!in) {
751  av_dict_copy(&opts, c->avio_opts, 0);
752 
753  if (c->http_persistent)
754  av_dict_set(&opts, "multiple_requests", "1", 0);
755 
756  ret = c->ctx->io_open(c->ctx, &in, url, AVIO_FLAG_READ, &opts);
757  av_dict_free(&opts);
758  if (ret < 0)
759  return ret;
760 
761  if (is_http && c->http_persistent)
762  c->playlist_pb = in;
763  else
764  close_in = 1;
765  }
766 
767  if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >= 0)
768  url = new_url;
769 
770  ff_get_chomp_line(in, line, sizeof(line));
771  if (strcmp(line, "#EXTM3U")) {
772  ret = AVERROR_INVALIDDATA;
773  goto fail;
774  }
775 
776  if (pls) {
777  prev_start_seq_no = pls->start_seq_no;
778  prev_segments = pls->segments;
779  prev_n_segments = pls->n_segments;
780  pls->segments = NULL;
781  pls->n_segments = 0;
782 
783  pls->finished = 0;
784  pls->type = PLS_TYPE_UNSPECIFIED;
785  }
786  while (!avio_feof(in)) {
787  ff_get_chomp_line(in, line, sizeof(line));
788  if (av_strstart(line, "#EXT-X-STREAM-INF:", &ptr)) {
789  is_variant = 1;
790  memset(&variant_info, 0, sizeof(variant_info));
792  &variant_info);
793  } else if (av_strstart(line, "#EXT-X-KEY:", &ptr)) {
794  struct key_info info = {{0}};
796  &info);
797  key_type = KEY_NONE;
798  has_iv = 0;
799  if (!strcmp(info.method, "AES-128"))
800  key_type = KEY_AES_128;
801  if (!strcmp(info.method, "SAMPLE-AES"))
802  key_type = KEY_SAMPLE_AES;
803  if (!strncmp(info.iv, "0x", 2) || !strncmp(info.iv, "0X", 2)) {
804  ff_hex_to_data(iv, info.iv + 2);
805  has_iv = 1;
806  }
807  av_strlcpy(key, info.uri, sizeof(key));
808  } else if (av_strstart(line, "#EXT-X-MEDIA:", &ptr)) {
809  struct rendition_info info = {{0}};
811  &info);
812  new_rendition(c, &info, url);
813  } else if (av_strstart(line, "#EXT-X-TARGETDURATION:", &ptr)) {
814  ret = ensure_playlist(c, &pls, url);
815  if (ret < 0)
816  goto fail;
817  pls->target_duration = strtoll(ptr, NULL, 10) * AV_TIME_BASE;
818  } else if (av_strstart(line, "#EXT-X-MEDIA-SEQUENCE:", &ptr)) {
819  ret = ensure_playlist(c, &pls, url);
820  if (ret < 0)
821  goto fail;
822  pls->start_seq_no = atoi(ptr);
823  } else if (av_strstart(line, "#EXT-X-PLAYLIST-TYPE:", &ptr)) {
824  ret = ensure_playlist(c, &pls, url);
825  if (ret < 0)
826  goto fail;
827  if (!strcmp(ptr, "EVENT"))
828  pls->type = PLS_TYPE_EVENT;
829  else if (!strcmp(ptr, "VOD"))
830  pls->type = PLS_TYPE_VOD;
831  } else if (av_strstart(line, "#EXT-X-MAP:", &ptr)) {
832  struct init_section_info info = {{0}};
833  ret = ensure_playlist(c, &pls, url);
834  if (ret < 0)
835  goto fail;
837  &info);
838  cur_init_section = new_init_section(pls, &info, url);
839  cur_init_section->key_type = key_type;
840  if (has_iv) {
841  memcpy(cur_init_section->iv, iv, sizeof(iv));
842  } else {
843  int seq = pls->start_seq_no + pls->n_segments;
844  memset(cur_init_section->iv, 0, sizeof(cur_init_section->iv));
845  AV_WB32(cur_init_section->iv + 12, seq);
846  }
847 
848  if (key_type != KEY_NONE) {
849  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, key);
850  if (!tmp_str[0]) {
851  av_free(cur_init_section);
852  ret = AVERROR_INVALIDDATA;
853  goto fail;
854  }
855  cur_init_section->key = av_strdup(tmp_str);
856  if (!cur_init_section->key) {
857  av_free(cur_init_section);
858  ret = AVERROR(ENOMEM);
859  goto fail;
860  }
861  } else {
862  cur_init_section->key = NULL;
863  }
864 
865  } else if (av_strstart(line, "#EXT-X-ENDLIST", &ptr)) {
866  if (pls)
867  pls->finished = 1;
868  } else if (av_strstart(line, "#EXTINF:", &ptr)) {
869  is_segment = 1;
870  duration = atof(ptr) * AV_TIME_BASE;
871  } else if (av_strstart(line, "#EXT-X-BYTERANGE:", &ptr)) {
872  seg_size = strtoll(ptr, NULL, 10);
873  ptr = strchr(ptr, '@');
874  if (ptr)
875  seg_offset = strtoll(ptr+1, NULL, 10);
876  } else if (av_strstart(line, "#", NULL)) {
877  av_log(c->ctx, AV_LOG_INFO, "Skip ('%s')\n", line);
878  continue;
879  } else if (line[0]) {
880  if (is_variant) {
881  if (!new_variant(c, &variant_info, line, url)) {
882  ret = AVERROR(ENOMEM);
883  goto fail;
884  }
885  is_variant = 0;
886  }
887  if (is_segment) {
888  struct segment *seg;
889  ret = ensure_playlist(c, &pls, url);
890  if (ret < 0)
891  goto fail;
892  seg = av_malloc(sizeof(struct segment));
893  if (!seg) {
894  ret = AVERROR(ENOMEM);
895  goto fail;
896  }
897  if (has_iv) {
898  memcpy(seg->iv, iv, sizeof(iv));
899  } else {
900  int seq = pls->start_seq_no + pls->n_segments;
901  memset(seg->iv, 0, sizeof(seg->iv));
902  AV_WB32(seg->iv + 12, seq);
903  }
904 
905  if (key_type != KEY_NONE) {
906  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, key);
907  if (!tmp_str[0]) {
908  ret = AVERROR_INVALIDDATA;
909  av_free(seg);
910  goto fail;
911  }
912  seg->key = av_strdup(tmp_str);
913  if (!seg->key) {
914  av_free(seg);
915  ret = AVERROR(ENOMEM);
916  goto fail;
917  }
918  } else {
919  seg->key = NULL;
920  }
921 
922  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, line);
923  if (!tmp_str[0]) {
924  ret = AVERROR_INVALIDDATA;
925  if (seg->key)
926  av_free(seg->key);
927  av_free(seg);
928  goto fail;
929  }
930  seg->url = av_strdup(tmp_str);
931  if (!seg->url) {
932  av_free(seg->key);
933  av_free(seg);
934  ret = AVERROR(ENOMEM);
935  goto fail;
936  }
937 
938  if (duration < 0.001 * AV_TIME_BASE) {
939  av_log(c->ctx, AV_LOG_WARNING, "Cannot get correct #EXTINF value of segment %s,"
940  " set to default value to 1ms.\n", seg->url);
941  duration = 0.001 * AV_TIME_BASE;
942  }
943  seg->duration = duration;
944  seg->key_type = key_type;
945  dynarray_add(&pls->segments, &pls->n_segments, seg);
946  is_segment = 0;
947 
948  seg->size = seg_size;
949  if (seg_size >= 0) {
950  seg->url_offset = seg_offset;
951  seg_offset += seg_size;
952  seg_size = -1;
953  } else {
954  seg->url_offset = 0;
955  seg_offset = 0;
956  }
957 
958  seg->init_section = cur_init_section;
959  }
960  }
961  }
962  if (prev_segments) {
963  if (pls->start_seq_no > prev_start_seq_no && c->first_timestamp != AV_NOPTS_VALUE) {
964  int64_t prev_timestamp = c->first_timestamp;
965  int i, diff = pls->start_seq_no - prev_start_seq_no;
966  for (i = 0; i < prev_n_segments && i < diff; i++) {
967  c->first_timestamp += prev_segments[i]->duration;
968  }
969  av_log(c->ctx, AV_LOG_DEBUG, "Media sequence change (%d -> %d)"
970  " reflected in first_timestamp: %"PRId64" -> %"PRId64"\n",
971  prev_start_seq_no, pls->start_seq_no,
972  prev_timestamp, c->first_timestamp);
973  } else if (pls->start_seq_no < prev_start_seq_no) {
974  av_log(c->ctx, AV_LOG_WARNING, "Media sequence changed unexpectedly: %d -> %d\n",
975  prev_start_seq_no, pls->start_seq_no);
976  }
977  free_segment_dynarray(prev_segments, prev_n_segments);
978  av_freep(&prev_segments);
979  }
980  if (pls)
982 
983 fail:
984  av_free(new_url);
985  if (close_in)
986  ff_format_io_close(c->ctx, &in);
987  c->ctx->ctx_flags = c->ctx->ctx_flags & ~(unsigned)AVFMTCTX_UNSEEKABLE;
988  if (!c->n_variants || !c->variants[0]->n_playlists ||
989  !(c->variants[0]->playlists[0]->finished ||
990  c->variants[0]->playlists[0]->type == PLS_TYPE_EVENT))
992  return ret;
993 }
994 
995 static struct segment *current_segment(struct playlist *pls)
996 {
997  return pls->segments[pls->cur_seq_no - pls->start_seq_no];
998 }
999 
1000 static struct segment *next_segment(struct playlist *pls)
1001 {
1002  int n = pls->cur_seq_no - pls->start_seq_no + 1;
1003  if (n >= pls->n_segments)
1004  return NULL;
1005  return pls->segments[n];
1006 }
1007 
1008 static int read_from_url(struct playlist *pls, struct segment *seg,
1009  uint8_t *buf, int buf_size)
1010 {
1011  int ret;
1012 
1013  /* limit read if the segment was only a part of a file */
1014  if (seg->size >= 0)
1015  buf_size = FFMIN(buf_size, seg->size - pls->cur_seg_offset);
1016 
1017  ret = avio_read(pls->input, buf, buf_size);
1018  if (ret > 0)
1019  pls->cur_seg_offset += ret;
1020 
1021  return ret;
1022 }
1023 
1024 /* Parse the raw ID3 data and pass contents to caller */
1026  AVDictionary **metadata, int64_t *dts,
1027  ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta **extra_meta)
1028 {
1029  static const char id3_priv_owner_ts[] = "com.apple.streaming.transportStreamTimestamp";
1030  ID3v2ExtraMeta *meta;
1031 
1032  ff_id3v2_read_dict(pb, metadata, ID3v2_DEFAULT_MAGIC, extra_meta);
1033  for (meta = *extra_meta; meta; meta = meta->next) {
1034  if (!strcmp(meta->tag, "PRIV")) {
1035  ID3v2ExtraMetaPRIV *priv = &meta->data.priv;
1036  if (priv->datasize == 8 && !strcmp(priv->owner, id3_priv_owner_ts)) {
1037  /* 33-bit MPEG timestamp */
1038  int64_t ts = AV_RB64(priv->data);
1039  av_log(s, AV_LOG_DEBUG, "HLS ID3 audio timestamp %"PRId64"\n", ts);
1040  if ((ts & ~((1ULL << 33) - 1)) == 0)
1041  *dts = ts;
1042  else
1043  av_log(s, AV_LOG_ERROR, "Invalid HLS ID3 audio timestamp %"PRId64"\n", ts);
1044  }
1045  } else if (!strcmp(meta->tag, "APIC") && apic)
1046  *apic = &meta->data.apic;
1047  }
1048 }
1049 
1050 /* Check if the ID3 metadata contents have changed */
1051 static int id3_has_changed_values(struct playlist *pls, AVDictionary *metadata,
1052  ID3v2ExtraMetaAPIC *apic)
1053 {
1054  AVDictionaryEntry *entry = NULL;
1055  AVDictionaryEntry *oldentry;
1056  /* check that no keys have changed values */
1057  while ((entry = av_dict_get(metadata, "", entry, AV_DICT_IGNORE_SUFFIX))) {
1058  oldentry = av_dict_get(pls->id3_initial, entry->key, NULL, AV_DICT_MATCH_CASE);
1059  if (!oldentry || strcmp(oldentry->value, entry->value) != 0)
1060  return 1;
1061  }
1062 
1063  /* check if apic appeared */
1064  if (apic && (pls->ctx->nb_streams != 2 || !pls->ctx->streams[1]->attached_pic.data))
1065  return 1;
1066 
1067  if (apic) {
1068  int size = pls->ctx->streams[1]->attached_pic.size;
1069  if (size != apic->buf->size - AV_INPUT_BUFFER_PADDING_SIZE)
1070  return 1;
1071 
1072  if (memcmp(apic->buf->data, pls->ctx->streams[1]->attached_pic.data, size) != 0)
1073  return 1;
1074  }
1075 
1076  return 0;
1077 }
1078 
1079 /* Parse ID3 data and handle the found data */
1080 static void handle_id3(AVIOContext *pb, struct playlist *pls)
1081 {
1082  AVDictionary *metadata = NULL;
1083  ID3v2ExtraMetaAPIC *apic = NULL;
1084  ID3v2ExtraMeta *extra_meta = NULL;
1085  int64_t timestamp = AV_NOPTS_VALUE;
1086 
1087  parse_id3(pls->ctx, pb, &metadata, &timestamp, &apic, &extra_meta);
1088 
1089  if (timestamp != AV_NOPTS_VALUE) {
1090  pls->id3_mpegts_timestamp = timestamp;
1091  pls->id3_offset = 0;
1092  }
1093 
1094  if (!pls->id3_found) {
1095  /* initial ID3 tags */
1097  pls->id3_found = 1;
1098 
1099  /* get picture attachment and set text metadata */
1100  if (pls->ctx->nb_streams)
1101  ff_id3v2_parse_apic(pls->ctx, extra_meta);
1102  else
1103  /* demuxer not yet opened, defer picture attachment */
1104  pls->id3_deferred_extra = extra_meta;
1105 
1106  ff_id3v2_parse_priv_dict(&metadata, extra_meta);
1107  av_dict_copy(&pls->ctx->metadata, metadata, 0);
1108  pls->id3_initial = metadata;
1109 
1110  } else {
1111  if (!pls->id3_changed && id3_has_changed_values(pls, metadata, apic)) {
1112  avpriv_report_missing_feature(pls->parent, "Changing ID3 metadata in HLS audio elementary stream");
1113  pls->id3_changed = 1;
1114  }
1115  av_dict_free(&metadata);
1116  }
1117 
1118  if (!pls->id3_deferred_extra)
1119  ff_id3v2_free_extra_meta(&extra_meta);
1120 }
1121 
1122 static void intercept_id3(struct playlist *pls, uint8_t *buf,
1123  int buf_size, int *len)
1124 {
1125  /* intercept id3 tags, we do not want to pass them to the raw
1126  * demuxer on all segment switches */
1127  int bytes;
1128  int id3_buf_pos = 0;
1129  int fill_buf = 0;
1130  struct segment *seg = current_segment(pls);
1131 
1132  /* gather all the id3 tags */
1133  while (1) {
1134  /* see if we can retrieve enough data for ID3 header */
1135  if (*len < ID3v2_HEADER_SIZE && buf_size >= ID3v2_HEADER_SIZE) {
1136  bytes = read_from_url(pls, seg, buf + *len, ID3v2_HEADER_SIZE - *len);
1137  if (bytes > 0) {
1138 
1139  if (bytes == ID3v2_HEADER_SIZE - *len)
1140  /* no EOF yet, so fill the caller buffer again after
1141  * we have stripped the ID3 tags */
1142  fill_buf = 1;
1143 
1144  *len += bytes;
1145 
1146  } else if (*len <= 0) {
1147  /* error/EOF */
1148  *len = bytes;
1149  fill_buf = 0;
1150  }
1151  }
1152 
1153  if (*len < ID3v2_HEADER_SIZE)
1154  break;
1155 
1156  if (ff_id3v2_match(buf, ID3v2_DEFAULT_MAGIC)) {
1157  int64_t maxsize = seg->size >= 0 ? seg->size : 1024*1024;
1158  int taglen = ff_id3v2_tag_len(buf);
1159  int tag_got_bytes = FFMIN(taglen, *len);
1160  int remaining = taglen - tag_got_bytes;
1161 
1162  if (taglen > maxsize) {
1163  av_log(pls->parent, AV_LOG_ERROR, "Too large HLS ID3 tag (%d > %"PRId64" bytes)\n",
1164  taglen, maxsize);
1165  break;
1166  }
1167 
1168  /*
1169  * Copy the id3 tag to our temporary id3 buffer.
1170  * We could read a small id3 tag directly without memcpy, but
1171  * we would still need to copy the large tags, and handling
1172  * both of those cases together with the possibility for multiple
1173  * tags would make the handling a bit complex.
1174  */
1175  pls->id3_buf = av_fast_realloc(pls->id3_buf, &pls->id3_buf_size, id3_buf_pos + taglen);
1176  if (!pls->id3_buf)
1177  break;
1178  memcpy(pls->id3_buf + id3_buf_pos, buf, tag_got_bytes);
1179  id3_buf_pos += tag_got_bytes;
1180 
1181  /* strip the intercepted bytes */
1182  *len -= tag_got_bytes;
1183  memmove(buf, buf + tag_got_bytes, *len);
1184  av_log(pls->parent, AV_LOG_DEBUG, "Stripped %d HLS ID3 bytes\n", tag_got_bytes);
1185 
1186  if (remaining > 0) {
1187  /* read the rest of the tag in */
1188  if (read_from_url(pls, seg, pls->id3_buf + id3_buf_pos, remaining) != remaining)
1189  break;
1190  id3_buf_pos += remaining;
1191  av_log(pls->parent, AV_LOG_DEBUG, "Stripped additional %d HLS ID3 bytes\n", remaining);
1192  }
1193 
1194  } else {
1195  /* no more ID3 tags */
1196  break;
1197  }
1198  }
1199 
1200  /* re-fill buffer for the caller unless EOF */
1201  if (*len >= 0 && (fill_buf || *len == 0)) {
1202  bytes = read_from_url(pls, seg, buf + *len, buf_size - *len);
1203 
1204  /* ignore error if we already had some data */
1205  if (bytes >= 0)
1206  *len += bytes;
1207  else if (*len == 0)
1208  *len = bytes;
1209  }
1210 
1211  if (pls->id3_buf) {
1212  /* Now parse all the ID3 tags */
1213  AVIOContext id3ioctx;
1214  ffio_init_context(&id3ioctx, pls->id3_buf, id3_buf_pos, 0, NULL, NULL, NULL, NULL);
1215  handle_id3(&id3ioctx, pls);
1216  }
1217 
1218  if (pls->is_id3_timestamped == -1)
1220 }
1221 
1222 static int open_input(HLSContext *c, struct playlist *pls, struct segment *seg, AVIOContext **in)
1223 {
1224  AVDictionary *opts = NULL;
1225  int ret;
1226  int is_http = 0;
1227 
1228  if (c->http_persistent)
1229  av_dict_set(&opts, "multiple_requests", "1", 0);
1230 
1231  if (seg->size >= 0) {
1232  /* try to restrict the HTTP request to the part we want
1233  * (if this is in fact a HTTP request) */
1234  av_dict_set_int(&opts, "offset", seg->url_offset, 0);
1235  av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
1236  }
1237 
1238  av_log(pls->parent, AV_LOG_VERBOSE, "HLS request for url '%s', offset %"PRId64", playlist %d\n",
1239  seg->url, seg->url_offset, pls->index);
1240 
1241  if (seg->key_type == KEY_NONE) {
1242  ret = open_url(pls->parent, in, seg->url, c->avio_opts, opts, &is_http);
1243  } else if (seg->key_type == KEY_AES_128) {
1244  char iv[33], key[33], url[MAX_URL_SIZE];
1245  if (strcmp(seg->key, pls->key_url)) {
1246  AVIOContext *pb = NULL;
1247  if (open_url(pls->parent, &pb, seg->key, c->avio_opts, opts, NULL) == 0) {
1248  ret = avio_read(pb, pls->key, sizeof(pls->key));
1249  if (ret != sizeof(pls->key)) {
1250  av_log(pls->parent, AV_LOG_ERROR, "Unable to read key file %s\n",
1251  seg->key);
1252  }
1253  ff_format_io_close(pls->parent, &pb);
1254  } else {
1255  av_log(pls->parent, AV_LOG_ERROR, "Unable to open key file %s\n",
1256  seg->key);
1257  }
1258  av_strlcpy(pls->key_url, seg->key, sizeof(pls->key_url));
1259  }
1260  ff_data_to_hex(iv, seg->iv, sizeof(seg->iv), 0);
1261  ff_data_to_hex(key, pls->key, sizeof(pls->key), 0);
1262  iv[32] = key[32] = '\0';
1263  if (strstr(seg->url, "://"))
1264  snprintf(url, sizeof(url), "crypto+%s", seg->url);
1265  else
1266  snprintf(url, sizeof(url), "crypto:%s", seg->url);
1267 
1268  av_dict_set(&opts, "key", key, 0);
1269  av_dict_set(&opts, "iv", iv, 0);
1270 
1271  ret = open_url(pls->parent, in, url, c->avio_opts, opts, &is_http);
1272  if (ret < 0) {
1273  goto cleanup;
1274  }
1275  ret = 0;
1276  } else if (seg->key_type == KEY_SAMPLE_AES) {
1277  av_log(pls->parent, AV_LOG_ERROR,
1278  "SAMPLE-AES encryption is not supported yet\n");
1279  ret = AVERROR_PATCHWELCOME;
1280  }
1281  else
1282  ret = AVERROR(ENOSYS);
1283 
1284  /* Seek to the requested position. If this was a HTTP request, the offset
1285  * should already be where want it to, but this allows e.g. local testing
1286  * without a HTTP server.
1287  *
1288  * This is not done for HTTP at all as avio_seek() does internal bookkeeping
1289  * of file offset which is out-of-sync with the actual offset when "offset"
1290  * AVOption is used with http protocol, causing the seek to not be a no-op
1291  * as would be expected. Wrong offset received from the server will not be
1292  * noticed without the call, though.
1293  */
1294  if (ret == 0 && !is_http && seg->key_type == KEY_NONE && seg->url_offset) {
1295  int64_t seekret = avio_seek(*in, seg->url_offset, SEEK_SET);
1296  if (seekret < 0) {
1297  av_log(pls->parent, AV_LOG_ERROR, "Unable to seek to offset %"PRId64" of HLS segment '%s'\n", seg->url_offset, seg->url);
1298  ret = seekret;
1299  ff_format_io_close(pls->parent, in);
1300  }
1301  }
1302 
1303 cleanup:
1304  av_dict_free(&opts);
1305  pls->cur_seg_offset = 0;
1306  return ret;
1307 }
1308 
1309 static int update_init_section(struct playlist *pls, struct segment *seg)
1310 {
1311  static const int max_init_section_size = 1024*1024;
1312  HLSContext *c = pls->parent->priv_data;
1313  int64_t sec_size;
1314  int64_t urlsize;
1315  int ret;
1316 
1317  if (seg->init_section == pls->cur_init_section)
1318  return 0;
1319 
1320  pls->cur_init_section = NULL;
1321 
1322  if (!seg->init_section)
1323  return 0;
1324 
1325  ret = open_input(c, pls, seg->init_section, &pls->input);
1326  if (ret < 0) {
1328  "Failed to open an initialization section in playlist %d\n",
1329  pls->index);
1330  return ret;
1331  }
1332 
1333  if (seg->init_section->size >= 0)
1334  sec_size = seg->init_section->size;
1335  else if ((urlsize = avio_size(pls->input)) >= 0)
1336  sec_size = urlsize;
1337  else
1338  sec_size = max_init_section_size;
1339 
1340  av_log(pls->parent, AV_LOG_DEBUG,
1341  "Downloading an initialization section of size %"PRId64"\n",
1342  sec_size);
1343 
1344  sec_size = FFMIN(sec_size, max_init_section_size);
1345 
1346  av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size);
1347 
1348  ret = read_from_url(pls, seg->init_section, pls->init_sec_buf,
1349  pls->init_sec_buf_size);
1350  ff_format_io_close(pls->parent, &pls->input);
1351 
1352  if (ret < 0)
1353  return ret;
1354 
1355  pls->cur_init_section = seg->init_section;
1356  pls->init_sec_data_len = ret;
1357  pls->init_sec_buf_read_offset = 0;
1358 
1359  /* spec says audio elementary streams do not have media initialization
1360  * sections, so there should be no ID3 timestamps */
1361  pls->is_id3_timestamped = 0;
1362 
1363  return 0;
1364 }
1365 
1366 static int64_t default_reload_interval(struct playlist *pls)
1367 {
1368  return pls->n_segments > 0 ?
1369  pls->segments[pls->n_segments - 1]->duration :
1370  pls->target_duration;
1371 }
1372 
1373 static int playlist_needed(struct playlist *pls)
1374 {
1375  AVFormatContext *s = pls->parent;
1376  int i, j;
1377  int stream_needed = 0;
1378  int first_st;
1379 
1380  /* If there is no context or streams yet, the playlist is needed */
1381  if (!pls->ctx || !pls->n_main_streams)
1382  return 1;
1383 
1384  /* check if any of the streams in the playlist are needed */
1385  for (i = 0; i < pls->n_main_streams; i++) {
1386  if (pls->main_streams[i]->discard < AVDISCARD_ALL) {
1387  stream_needed = 1;
1388  break;
1389  }
1390  }
1391 
1392  /* If all streams in the playlist were discarded, the playlist is not
1393  * needed (regardless of whether whole programs are discarded or not). */
1394  if (!stream_needed)
1395  return 0;
1396 
1397  /* Otherwise, check if all the programs (variants) this playlist is in are
1398  * discarded. Since all streams in the playlist are part of the same programs
1399  * we can just check the programs of the first stream. */
1400 
1401  first_st = pls->main_streams[0]->index;
1402 
1403  for (i = 0; i < s->nb_programs; i++) {
1404  AVProgram *program = s->programs[i];
1405  if (program->discard < AVDISCARD_ALL) {
1406  for (j = 0; j < program->nb_stream_indexes; j++) {
1407  if (program->stream_index[j] == first_st) {
1408  /* playlist is in an undiscarded program */
1409  return 1;
1410  }
1411  }
1412  }
1413  }
1414 
1415  /* some streams were not discarded but all the programs were */
1416  return 0;
1417 }
1418 
1419 static int read_data(void *opaque, uint8_t *buf, int buf_size)
1420 {
1421  struct playlist *v = opaque;
1422  HLSContext *c = v->parent->priv_data;
1423  int ret;
1424  int just_opened = 0;
1425  int reload_count = 0;
1426  struct segment *seg;
1427 
1428 restart:
1429  if (!v->needed)
1430  return AVERROR_EOF;
1431 
1432  if (!v->input || (c->http_persistent && v->input_read_done)) {
1433  int64_t reload_interval;
1434 
1435  /* Check that the playlist is still needed before opening a new
1436  * segment. */
1437  v->needed = playlist_needed(v);
1438 
1439  if (!v->needed) {
1440  av_log(v->parent, AV_LOG_INFO, "No longer receiving playlist %d ('%s')\n",
1441  v->index, v->url);
1442  return AVERROR_EOF;
1443  }
1444 
1445  /* If this is a live stream and the reload interval has elapsed since
1446  * the last playlist reload, reload the playlists now. */
1447  reload_interval = default_reload_interval(v);
1448 
1449 reload:
1450  reload_count++;
1451  if (reload_count > c->max_reload)
1452  return AVERROR_EOF;
1453  if (!v->finished &&
1454  av_gettime_relative() - v->last_load_time >= reload_interval) {
1455  if ((ret = parse_playlist(c, v->url, v, NULL)) < 0) {
1456  if (ret != AVERROR_EXIT)
1457  av_log(v->parent, AV_LOG_WARNING, "Failed to reload playlist %d\n",
1458  v->index);
1459  return ret;
1460  }
1461  /* If we need to reload the playlist again below (if
1462  * there's still no more segments), switch to a reload
1463  * interval of half the target duration. */
1464  reload_interval = v->target_duration / 2;
1465  }
1466  if (v->cur_seq_no < v->start_seq_no) {
1468  "skipping %d segments ahead, expired from playlists\n",
1469  v->start_seq_no - v->cur_seq_no);
1470  v->cur_seq_no = v->start_seq_no;
1471  }
1472  if (v->cur_seq_no > v->last_seq_no) {
1473  v->last_seq_no = v->cur_seq_no;
1474  v->m3u8_hold_counters = 0;
1475  } else if (v->last_seq_no == v->cur_seq_no) {
1476  v->m3u8_hold_counters++;
1477  if (v->m3u8_hold_counters >= c->m3u8_hold_counters) {
1478  return AVERROR_EOF;
1479  }
1480  } else {
1481  av_log(v->parent, AV_LOG_WARNING, "maybe the m3u8 list sequence have been wraped.\n");
1482  }
1483  if (v->cur_seq_no >= v->start_seq_no + v->n_segments) {
1484  if (v->finished)
1485  return AVERROR_EOF;
1486  while (av_gettime_relative() - v->last_load_time < reload_interval) {
1488  return AVERROR_EXIT;
1489  av_usleep(100*1000);
1490  }
1491  /* Enough time has elapsed since the last reload */
1492  goto reload;
1493  }
1494 
1495  v->input_read_done = 0;
1496  seg = current_segment(v);
1497 
1498  /* load/update Media Initialization Section, if any */
1499  ret = update_init_section(v, seg);
1500  if (ret)
1501  return ret;
1502 
1503  if (c->http_multiple == 1 && v->input_next_requested) {
1504  FFSWAP(AVIOContext *, v->input, v->input_next);
1505  v->cur_seg_offset = 0;
1506  v->input_next_requested = 0;
1507  ret = 0;
1508  } else {
1509  ret = open_input(c, v, seg, &v->input);
1510  }
1511  if (ret < 0) {
1513  return AVERROR_EXIT;
1514  av_log(v->parent, AV_LOG_WARNING, "Failed to open segment %d of playlist %d\n",
1515  v->cur_seq_no,
1516  v->index);
1517  v->cur_seq_no += 1;
1518  goto reload;
1519  }
1520  just_opened = 1;
1521  }
1522 
1523  if (c->http_multiple == -1) {
1524  uint8_t *http_version_opt = NULL;
1525  int r = av_opt_get(v->input, "http_version", AV_OPT_SEARCH_CHILDREN, &http_version_opt);
1526  if (r >= 0) {
1527  c->http_multiple = (!strncmp((const char *)http_version_opt, "1.1", 3) || !strncmp((const char *)http_version_opt, "2.0", 3));
1528  av_freep(&http_version_opt);
1529  }
1530  }
1531 
1532  seg = next_segment(v);
1533  if (c->http_multiple == 1 && !v->input_next_requested &&
1534  seg && seg->key_type == KEY_NONE && av_strstart(seg->url, "http", NULL)) {
1535  ret = open_input(c, v, seg, &v->input_next);
1536  if (ret < 0) {
1538  return AVERROR_EXIT;
1539  av_log(v->parent, AV_LOG_WARNING, "Failed to open next segment %d of playlist %d\n",
1540  v->cur_seq_no + 1,
1541  v->index);
1542  } else {
1543  v->input_next_requested = 1;
1544  }
1545  }
1546 
1548  /* Push init section out first before first actual segment */
1549  int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size);
1550  memcpy(buf, v->init_sec_buf, copy_size);
1551  v->init_sec_buf_read_offset += copy_size;
1552  return copy_size;
1553  }
1554 
1555  seg = current_segment(v);
1556  ret = read_from_url(v, seg, buf, buf_size);
1557  if (ret > 0) {
1558  if (just_opened && v->is_id3_timestamped != 0) {
1559  /* Intercept ID3 tags here, elementary audio streams are required
1560  * to convey timestamps using them in the beginning of each segment. */
1561  intercept_id3(v, buf, buf_size, &ret);
1562  }
1563 
1564  return ret;
1565  }
1566  if (c->http_persistent &&
1567  seg->key_type == KEY_NONE && av_strstart(seg->url, "http", NULL)) {
1568  v->input_read_done = 1;
1569  } else {
1570  ff_format_io_close(v->parent, &v->input);
1571  }
1572  v->cur_seq_no++;
1573 
1574  c->cur_seq_no = v->cur_seq_no;
1575 
1576  goto restart;
1577 }
1578 
1579 static void add_renditions_to_variant(HLSContext *c, struct variant *var,
1580  enum AVMediaType type, const char *group_id)
1581 {
1582  int i;
1583 
1584  for (i = 0; i < c->n_renditions; i++) {
1585  struct rendition *rend = c->renditions[i];
1586 
1587  if (rend->type == type && !strcmp(rend->group_id, group_id)) {
1588 
1589  if (rend->playlist)
1590  /* rendition is an external playlist
1591  * => add the playlist to the variant */
1592  dynarray_add(&var->playlists, &var->n_playlists, rend->playlist);
1593  else
1594  /* rendition is part of the variant main Media Playlist
1595  * => add the rendition to the main Media Playlist */
1596  dynarray_add(&var->playlists[0]->renditions,
1597  &var->playlists[0]->n_renditions,
1598  rend);
1599  }
1600  }
1601 }
1602 
1604  enum AVMediaType type)
1605 {
1606  int rend_idx = 0;
1607  int i;
1608 
1609  for (i = 0; i < pls->n_main_streams; i++) {
1610  AVStream *st = pls->main_streams[i];
1611 
1612  if (st->codecpar->codec_type != type)
1613  continue;
1614 
1615  for (; rend_idx < pls->n_renditions; rend_idx++) {
1616  struct rendition *rend = pls->renditions[rend_idx];
1617 
1618  if (rend->type != type)
1619  continue;
1620 
1621  if (rend->language[0])
1622  av_dict_set(&st->metadata, "language", rend->language, 0);
1623  if (rend->name[0])
1624  av_dict_set(&st->metadata, "comment", rend->name, 0);
1625 
1626  st->disposition |= rend->disposition;
1627  }
1628  if (rend_idx >=pls->n_renditions)
1629  break;
1630  }
1631 }
1632 
1633 /* if timestamp was in valid range: returns 1 and sets seq_no
1634  * if not: returns 0 and sets seq_no to closest segment */
1636  int64_t timestamp, int *seq_no)
1637 {
1638  int i;
1639  int64_t pos = c->first_timestamp == AV_NOPTS_VALUE ?
1640  0 : c->first_timestamp;
1641 
1642  if (timestamp < pos) {
1643  *seq_no = pls->start_seq_no;
1644  return 0;
1645  }
1646 
1647  for (i = 0; i < pls->n_segments; i++) {
1648  int64_t diff = pos + pls->segments[i]->duration - timestamp;
1649  if (diff > 0) {
1650  *seq_no = pls->start_seq_no + i;
1651  return 1;
1652  }
1653  pos += pls->segments[i]->duration;
1654  }
1655 
1656  *seq_no = pls->start_seq_no + pls->n_segments - 1;
1657 
1658  return 0;
1659 }
1660 
1661 static int select_cur_seq_no(HLSContext *c, struct playlist *pls)
1662 {
1663  int seq_no;
1664 
1665  if (!pls->finished && !c->first_packet &&
1667  /* reload the playlist since it was suspended */
1668  parse_playlist(c, pls->url, pls, NULL);
1669 
1670  /* If playback is already in progress (we are just selecting a new
1671  * playlist) and this is a complete file, find the matching segment
1672  * by counting durations. */
1673  if (pls->finished && c->cur_timestamp != AV_NOPTS_VALUE) {
1674  find_timestamp_in_playlist(c, pls, c->cur_timestamp, &seq_no);
1675  return seq_no;
1676  }
1677 
1678  if (!pls->finished) {
1679  if (!c->first_packet && /* we are doing a segment selection during playback */
1680  c->cur_seq_no >= pls->start_seq_no &&
1681  c->cur_seq_no < pls->start_seq_no + pls->n_segments)
1682  /* While spec 3.4.3 says that we cannot assume anything about the
1683  * content at the same sequence number on different playlists,
1684  * in practice this seems to work and doing it otherwise would
1685  * require us to download a segment to inspect its timestamps. */
1686  return c->cur_seq_no;
1687 
1688  /* If this is a live stream, start live_start_index segments from the
1689  * start or end */
1690  if (c->live_start_index < 0)
1691  return pls->start_seq_no + FFMAX(pls->n_segments + c->live_start_index, 0);
1692  else
1693  return pls->start_seq_no + FFMIN(c->live_start_index, pls->n_segments - 1);
1694  }
1695 
1696  /* Otherwise just start on the first segment. */
1697  return pls->start_seq_no;
1698 }
1699 
1701 {
1702  HLSContext *c = s->priv_data;
1703  static const char * const opts[] = {
1704  "headers", "http_proxy", "user_agent", "cookies", "referer", "rw_timeout", "icy", NULL };
1705  const char * const * opt = opts;
1706  uint8_t *buf;
1707  int ret = 0;
1708 
1709  while (*opt) {
1710  if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN | AV_OPT_ALLOW_NULL, &buf) >= 0) {
1711  ret = av_dict_set(&c->avio_opts, *opt, buf,
1713  if (ret < 0)
1714  return ret;
1715  }
1716  opt++;
1717  }
1718 
1719  return ret;
1720 }
1721 
1722 static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url,
1723  int flags, AVDictionary **opts)
1724 {
1725  av_log(s, AV_LOG_ERROR,
1726  "A HLS playlist item '%s' referred to an external file '%s'. "
1727  "Opening this file was forbidden for security reasons\n",
1728  s->url, url);
1729  return AVERROR(EPERM);
1730 }
1731 
1732 static void add_stream_to_programs(AVFormatContext *s, struct playlist *pls, AVStream *stream)
1733 {
1734  HLSContext *c = s->priv_data;
1735  int i, j;
1736  int bandwidth = -1;
1737 
1738  for (i = 0; i < c->n_variants; i++) {
1739  struct variant *v = c->variants[i];
1740 
1741  for (j = 0; j < v->n_playlists; j++) {
1742  if (v->playlists[j] != pls)
1743  continue;
1744 
1745  av_program_add_stream_index(s, i, stream->index);
1746 
1747  if (bandwidth < 0)
1748  bandwidth = v->bandwidth;
1749  else if (bandwidth != v->bandwidth)
1750  bandwidth = -1; /* stream in multiple variants with different bandwidths */
1751  }
1752  }
1753 
1754  if (bandwidth >= 0)
1755  av_dict_set_int(&stream->metadata, "variant_bitrate", bandwidth, 0);
1756 }
1757 
1759 {
1760  int err;
1761 
1762  err = avcodec_parameters_copy(st->codecpar, ist->codecpar);
1763  if (err < 0)
1764  return err;
1765 
1766  if (pls->is_id3_timestamped) /* custom timestamps via id3 */
1767  avpriv_set_pts_info(st, 33, 1, MPEG_TIME_BASE);
1768  else
1770 
1771  st->internal->need_context_update = 1;
1772 
1773  return 0;
1774 }
1775 
1776 /* add new subdemuxer streams to our context, if any */
1778 {
1779  int err;
1780 
1781  while (pls->n_main_streams < pls->ctx->nb_streams) {
1782  int ist_idx = pls->n_main_streams;
1783  AVStream *st = avformat_new_stream(s, NULL);
1784  AVStream *ist = pls->ctx->streams[ist_idx];
1785 
1786  if (!st)
1787  return AVERROR(ENOMEM);
1788 
1789  st->id = pls->index;
1790  dynarray_add(&pls->main_streams, &pls->n_main_streams, st);
1791 
1792  add_stream_to_programs(s, pls, st);
1793 
1794  err = set_stream_info_from_input_stream(st, pls, ist);
1795  if (err < 0)
1796  return err;
1797  }
1798 
1799  return 0;
1800 }
1801 
1803 {
1804  HLSContext *c = s->priv_data;
1805  int flag_needed = 0;
1806  int i;
1807 
1808  for (i = 0; i < c->n_playlists; i++) {
1809  struct playlist *pls = c->playlists[i];
1810 
1811  if (pls->has_noheader_flag) {
1812  flag_needed = 1;
1813  break;
1814  }
1815  }
1816 
1817  if (flag_needed)
1819  else
1821 }
1822 
1824 {
1825  HLSContext *c = s->priv_data;
1826 
1827  free_playlist_list(c);
1828  free_variant_list(c);
1830 
1831  av_dict_free(&c->avio_opts);
1833 
1834  return 0;
1835 }
1836 
1838 {
1839  HLSContext *c = s->priv_data;
1840  int ret = 0, i;
1841  int highest_cur_seq_no = 0;
1842 
1843  c->ctx = s;
1845 
1846  c->first_packet = 1;
1849 
1850  if ((ret = save_avio_options(s)) < 0)
1851  goto fail;
1852 
1853  /* XXX: Some HLS servers don't like being sent the range header,
1854  in this case, need to setting http_seekable = 0 to disable
1855  the range header */
1856  av_dict_set_int(&c->avio_opts, "seekable", c->http_seekable, 0);
1857 
1858  if ((ret = parse_playlist(c, s->url, NULL, s->pb)) < 0)
1859  goto fail;
1860 
1861  if (c->n_variants == 0) {
1862  av_log(s, AV_LOG_WARNING, "Empty playlist\n");
1863  ret = AVERROR_EOF;
1864  goto fail;
1865  }
1866  /* If the playlist only contained playlists (Master Playlist),
1867  * parse each individual playlist. */
1868  if (c->n_playlists > 1 || c->playlists[0]->n_segments == 0) {
1869  for (i = 0; i < c->n_playlists; i++) {
1870  struct playlist *pls = c->playlists[i];
1871  pls->m3u8_hold_counters = 0;
1872  if ((ret = parse_playlist(c, pls->url, pls, NULL)) < 0) {
1873  av_log(s, AV_LOG_WARNING, "parse_playlist error %s [%s]\n", av_err2str(ret), pls->url);
1874  pls->broken = 1;
1875  if (c->n_playlists > 1)
1876  continue;
1877  goto fail;
1878  }
1879  }
1880  }
1881 
1882  for (i = 0; i < c->n_variants; i++) {
1883  if (c->variants[i]->playlists[0]->n_segments == 0) {
1884  av_log(s, AV_LOG_WARNING, "Empty segment [%s]\n", c->variants[i]->playlists[0]->url);
1885  c->variants[i]->playlists[0]->broken = 1;
1886  }
1887  }
1888 
1889  /* If this isn't a live stream, calculate the total duration of the
1890  * stream. */
1891  if (c->variants[0]->playlists[0]->finished) {
1892  int64_t duration = 0;
1893  for (i = 0; i < c->variants[0]->playlists[0]->n_segments; i++)
1894  duration += c->variants[0]->playlists[0]->segments[i]->duration;
1895  s->duration = duration;
1896  }
1897 
1898  /* Associate renditions with variants */
1899  for (i = 0; i < c->n_variants; i++) {
1900  struct variant *var = c->variants[i];
1901 
1902  if (var->audio_group[0])
1904  if (var->video_group[0])
1906  if (var->subtitles_group[0])
1908  }
1909 
1910  /* Create a program for each variant */
1911  for (i = 0; i < c->n_variants; i++) {
1912  struct variant *v = c->variants[i];
1913  AVProgram *program;
1914 
1915  program = av_new_program(s, i);
1916  if (!program)
1917  goto fail;
1918  av_dict_set_int(&program->metadata, "variant_bitrate", v->bandwidth, 0);
1919  }
1920 
1921  /* Select the starting segments */
1922  for (i = 0; i < c->n_playlists; i++) {
1923  struct playlist *pls = c->playlists[i];
1924 
1925  if (pls->n_segments == 0)
1926  continue;
1927 
1928  pls->cur_seq_no = select_cur_seq_no(c, pls);
1929  highest_cur_seq_no = FFMAX(highest_cur_seq_no, pls->cur_seq_no);
1930  }
1931 
1932  /* Open the demuxer for each playlist */
1933  for (i = 0; i < c->n_playlists; i++) {
1934  struct playlist *pls = c->playlists[i];
1935  ff_const59 AVInputFormat *in_fmt = NULL;
1936 
1937  if (!(pls->ctx = avformat_alloc_context())) {
1938  ret = AVERROR(ENOMEM);
1939  goto fail;
1940  }
1941 
1942  if (pls->n_segments == 0)
1943  continue;
1944 
1945  pls->index = i;
1946  pls->needed = 1;
1947  pls->parent = s;
1948 
1949  /*
1950  * If this is a live stream and this playlist looks like it is one segment
1951  * behind, try to sync it up so that every substream starts at the same
1952  * time position (so e.g. avformat_find_stream_info() will see packets from
1953  * all active streams within the first few seconds). This is not very generic,
1954  * though, as the sequence numbers are technically independent.
1955  */
1956  if (!pls->finished && pls->cur_seq_no == highest_cur_seq_no - 1 &&
1957  highest_cur_seq_no < pls->start_seq_no + pls->n_segments) {
1958  pls->cur_seq_no = highest_cur_seq_no;
1959  }
1960 
1962  if (!pls->read_buffer){
1963  ret = AVERROR(ENOMEM);
1964  avformat_free_context(pls->ctx);
1965  pls->ctx = NULL;
1966  goto fail;
1967  }
1968  ffio_init_context(&pls->pb, pls->read_buffer, INITIAL_BUFFER_SIZE, 0, pls,
1969  read_data, NULL, NULL);
1970  pls->ctx->probesize = s->probesize > 0 ? s->probesize : 1024 * 4;
1972  ret = av_probe_input_buffer(&pls->pb, &in_fmt, pls->segments[0]->url,
1973  NULL, 0, 0);
1974  if (ret < 0) {
1975  /* Free the ctx - it isn't initialized properly at this point,
1976  * so avformat_close_input shouldn't be called. If
1977  * avformat_open_input fails below, it frees and zeros the
1978  * context, so it doesn't need any special treatment like this. */
1979  av_log(s, AV_LOG_ERROR, "Error when loading first segment '%s'\n", pls->segments[0]->url);
1980  avformat_free_context(pls->ctx);
1981  pls->ctx = NULL;
1982  goto fail;
1983  }
1984  pls->ctx->pb = &pls->pb;
1985  pls->ctx->io_open = nested_io_open;
1986  pls->ctx->flags |= s->flags & ~AVFMT_FLAG_CUSTOM_IO;
1987 
1988  if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
1989  goto fail;
1990 
1991  ret = avformat_open_input(&pls->ctx, pls->segments[0]->url, in_fmt, NULL);
1992  if (ret < 0)
1993  goto fail;
1994 
1995  if (pls->id3_deferred_extra && pls->ctx->nb_streams == 1) {
2000  }
2001 
2002  if (pls->is_id3_timestamped == -1)
2003  av_log(s, AV_LOG_WARNING, "No expected HTTP requests have been made\n");
2004 
2005  /*
2006  * For ID3 timestamped raw audio streams we need to detect the packet
2007  * durations to calculate timestamps in fill_timing_for_id3_timestamped_stream(),
2008  * but for other streams we can rely on our user calling avformat_find_stream_info()
2009  * on us if they want to.
2010  */
2011  if (pls->is_id3_timestamped || (pls->n_renditions > 0 && pls->renditions[0]->type == AVMEDIA_TYPE_AUDIO)) {
2012  ret = avformat_find_stream_info(pls->ctx, NULL);
2013  if (ret < 0)
2014  goto fail;
2015  }
2016 
2017  pls->has_noheader_flag = !!(pls->ctx->ctx_flags & AVFMTCTX_NOHEADER);
2018 
2019  /* Create new AVStreams for each stream in this playlist */
2020  ret = update_streams_from_subdemuxer(s, pls);
2021  if (ret < 0)
2022  goto fail;
2023 
2024  /*
2025  * Copy any metadata from playlist to main streams, but do not set
2026  * event flags.
2027  */
2028  if (pls->n_main_streams)
2029  av_dict_copy(&pls->main_streams[0]->metadata, pls->ctx->metadata, 0);
2030 
2034  }
2035 
2037 
2038  return 0;
2039 fail:
2040  hls_close(s);
2041  return ret;
2042 }
2043 
2044 static int recheck_discard_flags(AVFormatContext *s, int first)
2045 {
2046  HLSContext *c = s->priv_data;
2047  int i, changed = 0;
2048  int cur_needed;
2049 
2050  /* Check if any new streams are needed */
2051  for (i = 0; i < c->n_playlists; i++) {
2052  struct playlist *pls = c->playlists[i];
2053 
2054  cur_needed = playlist_needed(c->playlists[i]);
2055 
2056  if (pls->broken) {
2057  continue;
2058  }
2059  if (cur_needed && !pls->needed) {
2060  pls->needed = 1;
2061  changed = 1;
2062  pls->cur_seq_no = select_cur_seq_no(c, pls);
2063  pls->pb.eof_reached = 0;
2064  if (c->cur_timestamp != AV_NOPTS_VALUE) {
2065  /* catch up */
2066  pls->seek_timestamp = c->cur_timestamp;
2067  pls->seek_flags = AVSEEK_FLAG_ANY;
2068  pls->seek_stream_index = -1;
2069  }
2070  av_log(s, AV_LOG_INFO, "Now receiving playlist %d, segment %d\n", i, pls->cur_seq_no);
2071  } else if (first && !cur_needed && pls->needed) {
2072  ff_format_io_close(pls->parent, &pls->input);
2073  pls->input_read_done = 0;
2074  ff_format_io_close(pls->parent, &pls->input_next);
2075  pls->input_next_requested = 0;
2076  pls->needed = 0;
2077  changed = 1;
2078  av_log(s, AV_LOG_INFO, "No longer receiving playlist %d\n", i);
2079  }
2080  }
2081  return changed;
2082 }
2083 
2085 {
2086  if (pls->id3_offset >= 0) {
2087  pls->pkt.dts = pls->id3_mpegts_timestamp +
2088  av_rescale_q(pls->id3_offset,
2089  pls->ctx->streams[pls->pkt.stream_index]->time_base,
2091  if (pls->pkt.duration)
2092  pls->id3_offset += pls->pkt.duration;
2093  else
2094  pls->id3_offset = -1;
2095  } else {
2096  /* there have been packets with unknown duration
2097  * since the last id3 tag, should not normally happen */
2098  pls->pkt.dts = AV_NOPTS_VALUE;
2099  }
2100 
2101  if (pls->pkt.duration)
2102  pls->pkt.duration = av_rescale_q(pls->pkt.duration,
2103  pls->ctx->streams[pls->pkt.stream_index]->time_base,
2105 
2106  pls->pkt.pts = AV_NOPTS_VALUE;
2107 }
2108 
2109 static AVRational get_timebase(struct playlist *pls)
2110 {
2111  if (pls->is_id3_timestamped)
2112  return MPEG_TIME_BASE_Q;
2113 
2114  return pls->ctx->streams[pls->pkt.stream_index]->time_base;
2115 }
2116 
2117 static int compare_ts_with_wrapdetect(int64_t ts_a, struct playlist *pls_a,
2118  int64_t ts_b, struct playlist *pls_b)
2119 {
2120  int64_t scaled_ts_a = av_rescale_q(ts_a, get_timebase(pls_a), MPEG_TIME_BASE_Q);
2121  int64_t scaled_ts_b = av_rescale_q(ts_b, get_timebase(pls_b), MPEG_TIME_BASE_Q);
2122 
2123  return av_compare_mod(scaled_ts_a, scaled_ts_b, 1LL << 33);
2124 }
2125 
2127 {
2128  HLSContext *c = s->priv_data;
2129  int ret, i, minplaylist = -1;
2130 
2132  c->first_packet = 0;
2133 
2134  for (i = 0; i < c->n_playlists; i++) {
2135  struct playlist *pls = c->playlists[i];
2136  /* Make sure we've got one buffered packet from each open playlist
2137  * stream */
2138  if (pls->needed && !pls->pkt.data) {
2139  while (1) {
2140  int64_t ts_diff;
2141  AVRational tb;
2142  ret = av_read_frame(pls->ctx, &pls->pkt);
2143  if (ret < 0) {
2144  if (!avio_feof(&pls->pb) && ret != AVERROR_EOF)
2145  return ret;
2146  reset_packet(&pls->pkt);
2147  break;
2148  } else {
2149  /* stream_index check prevents matching picture attachments etc. */
2150  if (pls->is_id3_timestamped && pls->pkt.stream_index == 0) {
2151  /* audio elementary streams are id3 timestamped */
2153  }
2154 
2155  if (c->first_timestamp == AV_NOPTS_VALUE &&
2156  pls->pkt.dts != AV_NOPTS_VALUE)
2157  c->first_timestamp = av_rescale_q(pls->pkt.dts,
2159  }
2160 
2161  if (pls->seek_timestamp == AV_NOPTS_VALUE)
2162  break;
2163 
2164  if (pls->seek_stream_index < 0 ||
2165  pls->seek_stream_index == pls->pkt.stream_index) {
2166 
2167  if (pls->pkt.dts == AV_NOPTS_VALUE) {
2169  break;
2170  }
2171 
2172  tb = get_timebase(pls);
2173  ts_diff = av_rescale_rnd(pls->pkt.dts, AV_TIME_BASE,
2174  tb.den, AV_ROUND_DOWN) -
2175  pls->seek_timestamp;
2176  if (ts_diff >= 0 && (pls->seek_flags & AVSEEK_FLAG_ANY ||
2177  pls->pkt.flags & AV_PKT_FLAG_KEY)) {
2179  break;
2180  }
2181  }
2182  av_packet_unref(&pls->pkt);
2183  }
2184  }
2185  /* Check if this stream has the packet with the lowest dts */
2186  if (pls->pkt.data) {
2187  struct playlist *minpls = minplaylist < 0 ?
2188  NULL : c->playlists[minplaylist];
2189  if (minplaylist < 0) {
2190  minplaylist = i;
2191  } else {
2192  int64_t dts = pls->pkt.dts;
2193  int64_t mindts = minpls->pkt.dts;
2194 
2195  if (dts == AV_NOPTS_VALUE ||
2196  (mindts != AV_NOPTS_VALUE && compare_ts_with_wrapdetect(dts, pls, mindts, minpls) < 0))
2197  minplaylist = i;
2198  }
2199  }
2200  }
2201 
2202  /* If we got a packet, return it */
2203  if (minplaylist >= 0) {
2204  struct playlist *pls = c->playlists[minplaylist];
2205  AVStream *ist;
2206  AVStream *st;
2207 
2208  ret = update_streams_from_subdemuxer(s, pls);
2209  if (ret < 0) {
2210  av_packet_unref(&pls->pkt);
2211  return ret;
2212  }
2213 
2214  // If sub-demuxer reports updated metadata, copy it to the first stream
2215  // and set its AVSTREAM_EVENT_FLAG_METADATA_UPDATED flag.
2217  if (pls->n_main_streams) {
2218  st = pls->main_streams[0];
2219  av_dict_copy(&st->metadata, pls->ctx->metadata, 0);
2221  }
2223  }
2224 
2225  /* check if noheader flag has been cleared by the subdemuxer */
2226  if (pls->has_noheader_flag && !(pls->ctx->ctx_flags & AVFMTCTX_NOHEADER)) {
2227  pls->has_noheader_flag = 0;
2229  }
2230 
2231  if (pls->pkt.stream_index >= pls->n_main_streams) {
2232  av_log(s, AV_LOG_ERROR, "stream index inconsistency: index %d, %d main streams, %d subdemuxer streams\n",
2233  pls->pkt.stream_index, pls->n_main_streams, pls->ctx->nb_streams);
2234  av_packet_unref(&pls->pkt);
2235  return AVERROR_BUG;
2236  }
2237 
2238  ist = pls->ctx->streams[pls->pkt.stream_index];
2239  st = pls->main_streams[pls->pkt.stream_index];
2240 
2241  av_packet_move_ref(pkt, &pls->pkt);
2242  pkt->stream_index = st->index;
2243 
2244  if (pkt->dts != AV_NOPTS_VALUE)
2245  c->cur_timestamp = av_rescale_q(pkt->dts,
2246  ist->time_base,
2247  AV_TIME_BASE_Q);
2248 
2249  /* There may be more situations where this would be useful, but this at least
2250  * handles newly probed codecs properly (i.e. request_probe by mpegts). */
2251  if (ist->codecpar->codec_id != st->codecpar->codec_id) {
2252  ret = set_stream_info_from_input_stream(st, pls, ist);
2253  if (ret < 0) {
2254  return ret;
2255  }
2256  }
2257 
2258  return 0;
2259  }
2260  return AVERROR_EOF;
2261 }
2262 
2263 static int hls_read_seek(AVFormatContext *s, int stream_index,
2264  int64_t timestamp, int flags)
2265 {
2266  HLSContext *c = s->priv_data;
2267  struct playlist *seek_pls = NULL;
2268  int i, seq_no;
2269  int j;
2270  int stream_subdemuxer_index;
2271  int64_t first_timestamp, seek_timestamp, duration;
2272 
2273  if ((flags & AVSEEK_FLAG_BYTE) || (c->ctx->ctx_flags & AVFMTCTX_UNSEEKABLE))
2274  return AVERROR(ENOSYS);
2275 
2276  first_timestamp = c->first_timestamp == AV_NOPTS_VALUE ?
2277  0 : c->first_timestamp;
2278 
2279  seek_timestamp = av_rescale_rnd(timestamp, AV_TIME_BASE,
2280  s->streams[stream_index]->time_base.den,
2281  flags & AVSEEK_FLAG_BACKWARD ?
2283 
2284  duration = s->duration == AV_NOPTS_VALUE ?
2285  0 : s->duration;
2286 
2287  if (0 < duration && duration < seek_timestamp - first_timestamp)
2288  return AVERROR(EIO);
2289 
2290  /* find the playlist with the specified stream */
2291  for (i = 0; i < c->n_playlists; i++) {
2292  struct playlist *pls = c->playlists[i];
2293  for (j = 0; j < pls->n_main_streams; j++) {
2294  if (pls->main_streams[j] == s->streams[stream_index]) {
2295  seek_pls = pls;
2296  stream_subdemuxer_index = j;
2297  break;
2298  }
2299  }
2300  }
2301  /* check if the timestamp is valid for the playlist with the
2302  * specified stream index */
2303  if (!seek_pls || !find_timestamp_in_playlist(c, seek_pls, seek_timestamp, &seq_no))
2304  return AVERROR(EIO);
2305 
2306  /* set segment now so we do not need to search again below */
2307  seek_pls->cur_seq_no = seq_no;
2308  seek_pls->seek_stream_index = stream_subdemuxer_index;
2309 
2310  for (i = 0; i < c->n_playlists; i++) {
2311  /* Reset reading */
2312  struct playlist *pls = c->playlists[i];
2313  ff_format_io_close(pls->parent, &pls->input);
2314  pls->input_read_done = 0;
2315  ff_format_io_close(pls->parent, &pls->input_next);
2316  pls->input_next_requested = 0;
2317  av_packet_unref(&pls->pkt);
2318  pls->pb.eof_reached = 0;
2319  /* Clear any buffered data */
2320  pls->pb.buf_end = pls->pb.buf_ptr = pls->pb.buffer;
2321  /* Reset the pos, to let the mpegts demuxer know we've seeked. */
2322  pls->pb.pos = 0;
2323  /* Flush the packet queue of the subdemuxer. */
2324  ff_read_frame_flush(pls->ctx);
2325 
2327  pls->seek_flags = flags;
2328 
2329  if (pls != seek_pls) {
2330  /* set closest segment seq_no for playlists not handled above */
2331  find_timestamp_in_playlist(c, pls, seek_timestamp, &pls->cur_seq_no);
2332  /* seek the playlist to the given position without taking
2333  * keyframes into account since this playlist does not have the
2334  * specified stream where we should look for the keyframes */
2335  pls->seek_stream_index = -1;
2336  pls->seek_flags |= AVSEEK_FLAG_ANY;
2337  }
2338  }
2339 
2341 
2342  return 0;
2343 }
2344 
2345 static int hls_probe(const AVProbeData *p)
2346 {
2347  /* Require #EXTM3U at the start, and either one of the ones below
2348  * somewhere for a proper match. */
2349  if (strncmp(p->buf, "#EXTM3U", 7))
2350  return 0;
2351 
2352  if (strstr(p->buf, "#EXT-X-STREAM-INF:") ||
2353  strstr(p->buf, "#EXT-X-TARGETDURATION:") ||
2354  strstr(p->buf, "#EXT-X-MEDIA-SEQUENCE:"))
2355  return AVPROBE_SCORE_MAX;
2356  return 0;
2357 }
2358 
2359 #define OFFSET(x) offsetof(HLSContext, x)
2360 #define FLAGS AV_OPT_FLAG_DECODING_PARAM
2361 static const AVOption hls_options[] = {
2362  {"live_start_index", "segment index to start live streams at (negative values are from the end)",
2363  OFFSET(live_start_index), AV_OPT_TYPE_INT, {.i64 = -3}, INT_MIN, INT_MAX, FLAGS},
2364  {"allowed_extensions", "List of file extensions that hls is allowed to access",
2365  OFFSET(allowed_extensions), AV_OPT_TYPE_STRING,
2366  {.str = "3gp,aac,avi,flac,mkv,m3u8,m4a,m4s,m4v,mpg,mov,mp2,mp3,mp4,mpeg,mpegts,ogg,ogv,oga,ts,vob,wav"},
2367  INT_MIN, INT_MAX, FLAGS},
2368  {"max_reload", "Maximum number of times a insufficient list is attempted to be reloaded",
2369  OFFSET(max_reload), AV_OPT_TYPE_INT, {.i64 = 1000}, 0, INT_MAX, FLAGS},
2370  {"m3u8_hold_counters", "The maximum number of times to load m3u8 when it refreshes without new segments",
2371  OFFSET(m3u8_hold_counters), AV_OPT_TYPE_INT, {.i64 = 1000}, 0, INT_MAX, FLAGS},
2372  {"http_persistent", "Use persistent HTTP connections",
2373  OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS },
2374  {"http_multiple", "Use multiple HTTP connections for fetching segments",
2375  OFFSET(http_multiple), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, FLAGS},
2376  {"http_seekable", "Use HTTP partial requests, 0 = disable, 1 = enable, -1 = auto",
2377  OFFSET(http_seekable), AV_OPT_TYPE_BOOL, { .i64 = -1}, -1, 1, FLAGS},
2378  {NULL}
2379 };
2380 
2381 static const AVClass hls_class = {
2382  .class_name = "hls demuxer",
2383  .item_name = av_default_item_name,
2384  .option = hls_options,
2385  .version = LIBAVUTIL_VERSION_INT,
2386 };
2387 
2389  .name = "hls",
2390  .long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
2391  .priv_class = &hls_class,
2392  .priv_data_size = sizeof(HLSContext),
2394  .read_probe = hls_probe,
2397  .read_close = hls_close,
2399 };
#define FF_COMPLIANCE_EXPERIMENTAL
Allow nonstandardized experimental things.
Definition: avcodec.h:1594
#define AVSEEK_FLAG_BACKWARD
Definition: avformat.h:2512
int64_t probesize
Maximum size of the data read from input for determining the input container format.
Definition: avformat.h:1517
int(* io_open)(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **options)
A callback for opening new IO streams.
Definition: avformat.h:1933
uint8_t key[16]
Definition: hls.c:134
#define NULL
Definition: coverity.c:32
int ff_id3v2_parse_priv(AVFormatContext *s, ID3v2ExtraMeta *extra_meta)
Add metadata for all PRIV tags in the ID3v2 header.
Definition: id3v2.c:1261
static int update_init_section(struct playlist *pls, struct segment *seg)
Definition: hls.c:1309
int needed
Definition: hls.c:118
int m3u8_hold_counters
Definition: hls.c:122
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:122
Bytestream IO Context.
Definition: avio.h:161
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:334
int bandwidth
Definition: hls.c:181
static int read_from_url(struct playlist *pls, struct segment *seg, uint8_t *buf, int buf_size)
Definition: hls.c:1008
#define AVSTREAM_EVENT_FLAG_METADATA_UPDATED
The call resulted in updated metadata.
Definition: avformat.h:990
Definition: hls.c:93
ID3v2ExtraMetaPRIV priv
Definition: id3v2.h:91
char assoc_language[MAX_FIELD_LEN]
Definition: hls.c:464
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1629
union ID3v2ExtraMeta::@255 data
AVDictionary * id3_initial
Definition: hls.c:143
AVOption.
Definition: opt.h:246
static int set_stream_info_from_input_stream(AVStream *st, struct playlist *pls, AVStream *ist)
Definition: hls.c:1758
struct segment ** init_sections
Definition: hls.c:162
static void handle_init_section_args(struct init_section_info *info, const char *key, int key_len, char **dest, int *dest_len)
Definition: hls.c:447
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
unsigned int id3_buf_size
Definition: hls.c:142
ID3v2ExtraMeta * id3_deferred_extra
Definition: hls.c:146
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
unsigned char * buf_ptr
Current position in the buffer.
Definition: avio.h:228
unsigned char * buf_end
End of the data, may be less than buffer+buffer_size if the read function returned less data than req...
Definition: avio.h:229
#define AV_RB64
Definition: intreadwrite.h:164
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4938
int ff_copy_whiteblacklists(AVFormatContext *dst, const AVFormatContext *src)
Copies the whilelists from one context to the other.
Definition: utils.c:159
#define AVSEEK_FLAG_ANY
seek to any frame, even non-keyframes
Definition: avformat.h:2514
int event_flags
Flags for the user to detect events happening on the stream.
Definition: avformat.h:989
char forced[4]
Definition: hls.c:467
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:471
static int64_t default_reload_interval(struct playlist *pls)
Definition: hls.c:1366
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
int disposition
Definition: hls.c:177
unsigned int init_sec_data_len
Definition: hls.c:130
int num
Numerator.
Definition: rational.h:59
int index
stream index in AVFormatContext
Definition: avformat.h:877
int size
Definition: packet.h:356
#define ID3v2_DEFAULT_MAGIC
Default magic bytes for ID3v2 header: "ID3".
Definition: id3v2.h:35
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:241
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
#define AVIO_FLAG_READ
read-only
Definition: avio.h:674
char language[MAX_FIELD_LEN]
Definition: hls.c:463
unsigned char * buffer
Start of the buffer.
Definition: avio.h:226
int av_strncasecmp(const char *a, const char *b, size_t n)
Locale-independent case-insensitive compare.
Definition: avstring.c:223
int has_noheader_flag
Definition: hls.c:105
int event_flags
Flags for the user to detect events happening on the file.
Definition: avformat.h:1666
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:217
#define AV_DISPOSITION_HEARING_IMPAIRED
stream for hearing impaired audiences
Definition: avformat.h:834
int avformat_open_input(AVFormatContext **ps, const char *url, ff_const59 AVInputFormat *fmt, AVDictionary **options)
Open an input stream and read the header.
Definition: utils.c:533
static void fill_buf(uint8_t *data, int w, int h, int linesize, uint8_t v)
char * key
Definition: hls.c:73
int av_usleep(unsigned usec)
Sleep for a period of time.
Definition: time.c:84
discard all
Definition: avcodec.h:236
static AVPacket pkt
static void handle_rendition_args(struct rendition_info *info, const char *key, int key_len, char **dest, int *dest_len)
Definition: hls.c:555
#define MAX_CHARACTERISTICS_LEN
Definition: hls.c:45
int broken
Definition: hls.c:119
int av_probe_input_buffer(AVIOContext *pb, ff_const59 AVInputFormat **fmt, const char *url, void *logctx, unsigned int offset, unsigned int max_probe_size)
Like av_probe_input_buffer2() but returns 0 on success.
Definition: format.c:312
int ctx_flags
Flags signalling stream properties.
Definition: avformat.h:1400
static void reset_packet(AVPacket *pkt)
Definition: hls.c:300
int http_seekable
Definition: hls.c:214
int strict_std_compliance
Allow non-standard and experimental extension.
Definition: avformat.h:1659
char * url
Definition: hls.c:72
uint8_t base
Definition: vp3data.h:202
int64_t url_offset
Definition: hls.c:70
static int id3_has_changed_values(struct playlist *pls, AVDictionary *metadata, ID3v2ExtraMetaAPIC *apic)
Definition: hls.c:1051
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:379
void ff_read_frame_flush(AVFormatContext *s)
Flush the frame reader.
Definition: utils.c:1924
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
unsigned int init_sec_buf_read_offset
Definition: hls.c:131
Public dictionary API.
char type[16]
Definition: hls.c:460
int n_renditions
Definition: hls.c:199
#define ID3v2_HEADER_SIZE
Definition: id3v2.h:30
int last_seq_no
Definition: hls.c:121
#define MPEG_TIME_BASE_Q
Definition: hls.c:48
enum AVMediaType type
Definition: hls.c:172
uint8_t iv[16]
Definition: hls.c:75
char defaultr[4]
Definition: hls.c:466
uint8_t
Round toward +infinity.
Definition: mathematics.h:83
int http_multiple
Definition: hls.c:213
int n_variants
Definition: hls.c:195
#define FLAGS
Definition: hls.c:2360
#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:462
int64_t cur_seg_offset
Definition: hls.c:123
char audio[MAX_FIELD_LEN]
Definition: hls.c:328
static void free_rendition_list(HLSContext *c)
Definition: hls.c:287
#define AVFMTCTX_UNSEEKABLE
signal that the stream is definitely not seekable, and attempts to call the seek function will fail...
Definition: avformat.h:1298
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:373
static struct segment * next_segment(struct playlist *pls)
Definition: hls.c:1000
int id
Format-specific stream ID.
Definition: avformat.h:883
uint8_t * read_buffer
Definition: hls.c:96
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5685
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:1122
static struct playlist * new_playlist(HLSContext *c, const char *url, const char *base)
Definition: hls.c:306
AVInputFormat ff_hls_demuxer
Definition: hls.c:2388
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4519
int finished
Definition: hls.c:112
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1419
static void handle_id3(AVIOContext *pb, struct playlist *pls)
Definition: hls.c:1080
int n_playlists
Definition: hls.c:197
AVFormatContext * avformat_alloc_context(void)
Allocate an AVFormatContext.
Definition: options.c:144
#define AVERROR_PROTOCOL_NOT_FOUND
Protocol not found.
Definition: error.h:63
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:40
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1482
uint8_t * data
Definition: packet.h:355
AVProgram * av_new_program(AVFormatContext *s, int id)
Definition: utils.c:4618
void av_packet_move_ref(AVPacket *dst, AVPacket *src)
Move every field in src to dst and reset src.
Definition: avpacket.c:663
static int read_data(void *opaque, uint8_t *buf, int buf_size)
Definition: hls.c:1419
#define AVERROR_EOF
End of file.
Definition: error.h:55
unsigned int init_sec_buf_size
Definition: hls.c:129
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
int input_next_requested
Definition: hls.c:100
int av_match_ext(const char *filename, const char *extensions)
Return a positive value if the given filename has one of the given extensions, 0 otherwise.
Definition: format.c:38
struct rendition ** renditions
Definition: hls.c:157
int ff_http_do_new_request2(URLContext *h, const char *uri, AVDictionary **opts)
Send a new HTTP request, reusing the old connection.
Definition: http.c:337
enum AVDiscard discard
selects which program to discard and which to feed to the caller
Definition: avformat.h:1271
static void add_metadata_from_renditions(AVFormatContext *s, struct playlist *pls, enum AVMediaType type)
Definition: hls.c:1603
unsigned int * stream_index
Definition: avformat.h:1272
#define av_log(a,...)
static void free_playlist_list(HLSContext *c)
Definition: hls.c:246
struct rendition ** renditions
Definition: hls.c:200
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:625
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:388
struct variant ** variants
Definition: hls.c:196
static void free_segment_dynarray(struct segment **segments, int n_segments)
Definition: hls.c:218
static AVRational get_timebase(struct playlist *pls)
Definition: hls.c:2109
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
Callback for checking whether to abort blocking functions.
Definition: avio.h:58
#define ff_const59
The ff_const59 define is not part of the public API and will be removed without further warning...
Definition: avformat.h:544
AVIOContext * playlist_pb
Definition: hls.c:215
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
AVStream ** main_streams
Definition: hls.c:109
static int compare_ts_with_wrapdetect(int64_t ts_a, struct playlist *pls_a, int64_t ts_b, struct playlist *pls_b)
Definition: hls.c:2117
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define AV_DICT_MATCH_CASE
Only get an entry with exact-case key match.
Definition: dict.h:69
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1591
char video_group[MAX_FIELD_LEN]
Definition: hls.c:188
int64_t cur_timestamp
Definition: hls.c:207
int n_renditions
Definition: hls.c:156
static const AVClass hls_class
Definition: hls.c:2381
AVIOInterruptCB * interrupt_callback
Definition: hls.c:208
char bandwidth[20]
Definition: hls.c:326
#define AVFMT_TS_DISCONT
Format allows timestamp discontinuities.
Definition: avformat.h:464
static void handle_key_args(struct key_info *info, const char *key, int key_len, char **dest, int *dest_len)
Definition: hls.c:383
#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:114
unsigned int pos
Definition: spdifenc.c:410
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
unsigned int nb_programs
Definition: avformat.h:1530
char byterange[32]
Definition: hls.c:400
int64_t id3_mpegts_timestamp
Definition: hls.c:139
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:203
static void free_segment_list(struct playlist *pls)
Definition: hls.c:228
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1114
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:1777
int first_packet
Definition: hls.c:205
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:239
static int find_timestamp_in_playlist(HLSContext *c, struct playlist *pls, int64_t timestamp, int *seq_no)
Definition: hls.c:1635
uint8_t * data
Definition: id3v2.h:74
int64_t id3_offset
Definition: hls.c:140
int is_id3_timestamped
Definition: hls.c:138
New fields can be added to the end with minor version bumps.
Definition: avformat.h:1268
#define FFMAX(a, b)
Definition: common.h:94
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:83
#define fail()
Definition: checkasm.h:123
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:361
void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size)
Allocate a buffer, reusing the given one if large enough.
Definition: mem.c:504
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:443
int live_start_index
Definition: hls.c:204
Definition: hls.c:68
#define AV_DISPOSITION_FORCED
Track should be used during playback by default.
Definition: avformat.h:833
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1407
AVDictionary * opts
Definition: movenc.c:50
char group_id[MAX_FIELD_LEN]
Definition: hls.c:174
static struct segment * current_segment(struct playlist *pls)
Definition: hls.c:995
const char * name
Definition: qsvenc.c:46
int n_main_streams
Definition: hls.c:110
#define dynarray_add(tab, nb_ptr, elem)
Definition: internal.h:197
static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **opts)
Definition: hls.c:1722
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:254
void av_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
#define FFMIN(a, b)
Definition: common.h:96
void(* ff_parse_key_val_cb)(void *context, const char *key, int key_len, char **dest, int *dest_len)
Callback function type for ff_parse_key_value.
Definition: internal.h:355
#define AV_OPT_SEARCH_CHILDREN
Search in possible children of the given object first.
Definition: opt.h:558
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that&#39;s been allocated with av_malloc() or another memory allocation functio...
Definition: dict.h:76
char * allowed_extensions
Definition: hls.c:210
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:1579
uint8_t * init_sec_buf
Definition: hls.c:128
#define av_err2str(errnum)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: error.h:119
static int hls_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: hls.c:2126
uint8_t * id3_buf
Definition: hls.c:141
#define AVFMT_EVENT_FLAG_METADATA_UPDATED
The call resulted in updated metadata.
Definition: avformat.h:1667
Definition: hls.c:377
#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:403
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:480
AVDictionary * metadata
Definition: avformat.h:940
static struct variant * new_variant(HLSContext *c, struct variant_info *info, const char *url, const char *base)
Definition: hls.c:333
#define AVFMT_FLAG_CUSTOM_IO
The caller has supplied a custom AVIOContext, don&#39;t avio_close() it.
Definition: avformat.h:1490
Usually treated as AVMEDIA_TYPE_DATA.
Definition: avutil.h:200
static void fill_timing_for_id3_timestamped_stream(struct playlist *pls)
Definition: hls.c:2084
struct segment ** segments
Definition: hls.c:117
#define AVERROR_EXIT
Immediate exit was requested; the called function should not be restarted.
Definition: error.h:56
int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding rnd)
Rescale a 64-bit integer with specified rounding.
Definition: mathematics.c:58
AVPacket pkt
Definition: hls.c:104
uint8_t * owner
Definition: id3v2.h:73
int input_read_done
Definition: hls.c:98
int64_t max_analyze_duration
Maximum duration (in AV_TIME_BASE units) of the data read from input in avformat_find_stream_info().
Definition: avformat.h:1525
char subtitles_group[MAX_FIELD_LEN]
Definition: hls.c:189
char name[MAX_FIELD_LEN]
Definition: hls.c:465
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:527
#define AV_DISPOSITION_VISUAL_IMPAIRED
stream for visual impaired audiences
Definition: avformat.h:835
int64_t size
Definition: hls.c:71
enum KeyType key_type
Definition: hls.c:74
Stream structure.
Definition: avformat.h:876
int id3_changed
Definition: hls.c:145
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
int avformat_queue_attached_pictures(AVFormatContext *s)
Definition: utils.c:475
AVFormatContext * parent
Definition: hls.c:101
AVFormatContext * ctx
Definition: hls.c:194
static void parse_id3(AVFormatContext *s, AVIOContext *pb, AVDictionary **metadata, int64_t *dts, ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta **extra_meta)
Definition: hls.c:1025
#define AV_DISPOSITION_DEFAULT
Definition: avformat.h:821
int64_t first_timestamp
Definition: hls.c:206
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:255
char subtitles[MAX_FIELD_LEN]
Definition: hls.c:330
AVStreamInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1231
struct ID3v2ExtraMeta * next
Definition: id3v2.h:86
int ff_check_interrupt(AVIOInterruptCB *cb)
Check if the user has requested to interrupt a blocking function associated with cb.
Definition: avio.c:663
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:712
int n_init_sections
Definition: hls.c:161
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:605
uint8_t * data
The data buffer.
Definition: buffer.h:89
static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url, AVDictionary *opts, AVDictionary *opts2, int *is_http_out)
Definition: hls.c:627
#define AVFMT_NOGENSEARCH
Format does not allow to fall back on generic search.
Definition: avformat.h:469
static const AVOption hls_options[]
Definition: hls.c:2361
static int hls_read_header(AVFormatContext *s)
Definition: hls.c:1837
Definition: url.h:38
ID3v2ExtraMetaAPIC apic
Definition: id3v2.h:88
int max_reload
Definition: hls.c:211
int ff_id3v2_parse_apic(AVFormatContext *s, ID3v2ExtraMeta *extra_meta)
Create a stream for each APIC (attached picture) extracted from the ID3v2 header. ...
Definition: id3v2.c:1130
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:70
struct playlist ** playlists
Definition: hls.c:198
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:50
static int open_input(HLSContext *c, struct playlist *pls, struct segment *seg, AVIOContext **in)
Definition: hls.c:1222
int64_t last_load_time
Definition: hls.c:124
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) #define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac) { } void ff_audio_convert_free(AudioConvert **ac) { if(! *ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);} AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map) { AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method !=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt) > 2) { ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc) { av_free(ac);return NULL;} return ac;} in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar) { ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar ? ac->channels :1;} else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);return ac;} int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in) { int use_generic=1;int len=in->nb_samples;int p;if(ac->dc) { av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (dithered)\", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
Describe the class of an AVClass context structure.
Definition: log.h:67
int ff_id3v2_parse_priv_dict(AVDictionary **metadata, ID3v2ExtraMeta *extra_meta)
Parse PRIV tags into a dictionary.
Definition: id3v2.c:1221
static void update_noheader_flag(AVFormatContext *s)
Definition: hls.c:1802
#define AV_WB32(p, v)
Definition: intreadwrite.h:419
AVIOContext * input
Definition: hls.c:97
Rational number (pair of numerator and denominator).
Definition: rational.h:58
struct segment * cur_init_section
Definition: hls.c:127
int seek_stream_index
Definition: hls.c:150
PlaylistType
Definition: hls.c:82
int64_t target_duration
Definition: hls.c:114
static int save_avio_options(AVFormatContext *s)
Definition: hls.c:1700
#define AV_OPT_ALLOW_NULL
In av_opt_get, return NULL if the option has a pointer type and is set to NULL, rather than returning...
Definition: opt.h:573
#define AVSEEK_FLAG_BYTE
seeking based on position in bytes
Definition: avformat.h:2513
int need_context_update
Whether the internal avctx needs to be updated from codecpar (after a late change to codecpar) ...
Definition: internal.h:189
cl_device_type type
char uri[MAX_URL_SIZE]
Definition: hls.c:461
AVMediaType
Definition: avutil.h:199
int n_playlists
Definition: hls.c:184
struct playlist * playlist
Definition: hls.c:173
static void add_stream_to_programs(AVFormatContext *s, struct playlist *pls, AVStream *stream)
Definition: hls.c:1732
#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:4448
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
int ff_hex_to_data(uint8_t *data, const char *p)
Parse a string of hexadecimal strings.
Definition: utils.c:4910
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1773
Definition: hls.c:171
Round toward -infinity.
Definition: mathematics.h:82
static void handle_variant_args(struct variant_info *info, const char *key, int key_len, char **dest, int *dest_len)
Definition: hls.c:359
const char * avio_find_protocol_name(const char *url)
Return the name of the protocol that will handle the passed URL.
Definition: avio.c:472
int size
Size of data in bytes.
Definition: buffer.h:93
URLContext * ffio_geturlcontext(AVIOContext *s)
Return the URLContext associated with the AVIOContext.
Definition: aviobuf.c:971
AVDictionary * metadata
Definition: avformat.h:1274
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
char audio_group[MAX_FIELD_LEN]
Definition: hls.c:187
int64_t av_gettime_relative(void)
Get the current time in microseconds since some unspecified starting point.
Definition: time.c:56
#define flags(name, subs,...)
Definition: cbs_av1.c:564
KeyType
Definition: hls.c:62
static int recheck_discard_flags(AVFormatContext *s, int first)
Definition: hls.c:2044
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:4968
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
int64_t seek_timestamp
Definition: hls.c:148
char iv[35]
Definition: hls.c:380
#define OFFSET(x)
Definition: hls.c:2359
char characteristics[MAX_CHARACTERISTICS_LEN]
Definition: hls.c:468
int seek_flags
Definition: hls.c:149
char * av_strtok(char *s, const char *delim, char **saveptr)
Split the string into several tokens which can be accessed by successive calls to av_strtok()...
Definition: avstring.c:184
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:453
int av_strstart(const char *str, const char *pfx, const char **ptr)
Return non-zero if pfx is a prefix of str.
Definition: avstring.c:34
char language[MAX_FIELD_LEN]
Definition: hls.c:175
AVIOContext pb
Definition: hls.c:95
Main libavformat public API header.
char uri[MAX_URL_SIZE]
Definition: hls.c:378
const OptionDef options[]
Definition: ffmpeg_opt.c:3388
#define INITIAL_BUFFER_SIZE
Definition: hls.c:42
int ff_id3v2_match(const uint8_t *buf, const char *magic)
Detect ID3v2 Header.
Definition: id3v2.c:143
int ffio_init_context(AVIOContext *s, unsigned char *buffer, int buffer_size, int write_flag, void *opaque, int(*read_packet)(void *opaque, uint8_t *buf, int buf_size), int(*write_packet)(void *opaque, uint8_t *buf, int buf_size), int64_t(*seek)(void *opaque, int64_t offset, int whence))
Definition: aviobuf.c:76
#define MAX_FIELD_LEN
Definition: hls.c:44
static int playlist_needed(struct playlist *pls)
Definition: hls.c:1373
int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
Read packets of a media file to get stream information.
Definition: utils.c:3615
const char * tag
Definition: id3v2.h:85
static double c[64]
int cur_seq_no
Definition: hls.c:202
int av_dict_set_int(AVDictionary **pm, const char *key, int64_t value, int flags)
Convenience wrapper for av_dict_set that converts the value to a string and stores it...
Definition: dict.c:147
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:929
static int open_url_keepalive(AVFormatContext *s, AVIOContext **pb, const char *url, AVDictionary **options)
Definition: hls.c:609
int64_t pos
position in the file of the current buffer
Definition: avio.h:238
int pts_wrap_bits
number of bits in pts (used for wrapping control)
Definition: avformat.h:1068
AVDictionary * avio_opts
Definition: hls.c:209
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:35
char * key
Definition: dict.h:86
int n_segments
Definition: hls.c:116
int den
Denominator.
Definition: rational.h:60
void avformat_close_input(AVFormatContext **s)
Close an opened input AVFormatContext.
Definition: utils.c:4491
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:215
int http_persistent
Definition: hls.c:212
static int ensure_playlist(HLSContext *c, struct playlist **pls, const char *url)
Definition: hls.c:599
static int hls_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: hls.c:2263
static av_always_inline int diff(const uint32_t a, const uint32_t b)
int av_opt_get(void *obj, const char *name, int search_flags, uint8_t **out_val)
Definition: opt.c:779
#define av_free(p)
int id3_found
Definition: hls.c:144
char name[MAX_FIELD_LEN]
Definition: hls.c:176
void ff_id3v2_read_dict(AVIOContext *pb, AVDictionary **metadata, const char *magic, ID3v2ExtraMeta **extra_meta)
Read an ID3v2 tag into specified dictionary and retrieve supported extra metadata.
Definition: id3v2.c:1102
char * value
Definition: dict.h:87
int eof_reached
true if was unable to read due to error or eof
Definition: avio.h:239
int len
int ff_id3v2_tag_len(const uint8_t *buf)
Get the length of an ID3v2 tag.
Definition: id3v2.c:156
void * priv_data
Format private data.
Definition: avformat.h:1379
static int hls_probe(const AVProbeData *p)
Definition: hls.c:2345
AVBufferRef * buf
Definition: id3v2.h:66
AVFormatContext * ctx
Definition: hls.c:103
uint32_t datasize
Definition: id3v2.h:75
struct playlist ** playlists
Definition: hls.c:185
Definition: hls.c:180
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: packet.h:354
char video[MAX_FIELD_LEN]
Definition: hls.c:329
int64_t duration
Duration of the stream, in AV_TIME_BASE fractional seconds.
Definition: avformat.h:1466
#define av_freep(p)
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:650
#define AV_DICT_IGNORE_SUFFIX
Return first entry in a dictionary whose first part corresponds to the search key, ignoring the suffix of the found key string.
Definition: dict.h:70
int m3u8_hold_counters
Definition: hls.c:203
char uri[MAX_URL_SIZE]
Definition: hls.c:399
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1023
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:356
#define FFSWAP(type, a, b)
Definition: common.h:99
int start_seq_no
Definition: hls.c:115
int stream_index
Definition: packet.h:357
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:905
static void free_init_section_list(struct playlist *pls)
Definition: hls.c:235
int64_t duration
Definition: hls.c:69
static void free_variant_list(HLSContext *c)
Definition: hls.c:275
int ff_get_chomp_line(AVIOContext *s, char *buf, int maxlen)
Same as ff_get_line but strip the white-space characters in the text tail.
Definition: aviobuf.c:803
int cur_seq_no
Definition: hls.c:120
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
Definition: utils.c:2064
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:931
char key_url[MAX_URL_SIZE]
Definition: hls.c:133
static int hls_close(AVFormatContext *s)
Definition: hls.c:1823
char * ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase)
Definition: utils.c:4889
This structure stores compressed data.
Definition: packet.h:332
Definition: hls.c:63
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:348
AVPacket attached_pic
For streams with AV_DISPOSITION_ATTACHED_PIC disposition, this packet will contain the attached pictu...
Definition: avformat.h:958
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
#define tb
Definition: regdef.h:68
AVProgram ** programs
Definition: avformat.h:1531
static av_cold void cleanup(FlashSV2Context *s)
Definition: flashsv2enc.c:127
int64_t av_compare_mod(uint64_t a, uint64_t b, uint64_t mod)
Compare the remainders of two integer operands divided by a common divisor.
Definition: mathematics.c:160
static int select_cur_seq_no(HLSContext *c, struct playlist *pls)
Definition: hls.c:1661
static uint8_t tmp[11]
Definition: aes_ctr.c:26