FFmpeg  4.3.9
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 {
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;
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 
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 
217 } HLSContext;
218 
219 static void free_segment_dynarray(struct segment **segments, int n_segments)
220 {
221  int i;
222  for (i = 0; i < n_segments; i++) {
223  av_freep(&segments[i]->key);
224  av_freep(&segments[i]->url);
225  av_freep(&segments[i]);
226  }
227 }
228 
229 static void free_segment_list(struct playlist *pls)
230 {
232  av_freep(&pls->segments);
233  pls->n_segments = 0;
234 }
235 
236 static void free_init_section_list(struct playlist *pls)
237 {
238  int i;
239  for (i = 0; i < pls->n_init_sections; i++) {
240  av_freep(&pls->init_sections[i]->key);
241  av_freep(&pls->init_sections[i]->url);
242  av_freep(&pls->init_sections[i]);
243  }
244  av_freep(&pls->init_sections);
245  pls->n_init_sections = 0;
246 }
247 
249 {
250  int i;
251  for (i = 0; i < c->n_playlists; i++) {
252  struct playlist *pls = c->playlists[i];
253  free_segment_list(pls);
255  av_freep(&pls->main_streams);
256  av_freep(&pls->renditions);
257  av_freep(&pls->id3_buf);
258  av_dict_free(&pls->id3_initial);
260  av_freep(&pls->init_sec_buf);
261  av_packet_unref(&pls->pkt);
262  av_freep(&pls->pb.buffer);
263  ff_format_io_close(c->ctx, &pls->input);
264  pls->input_read_done = 0;
265  ff_format_io_close(c->ctx, &pls->input_next);
266  pls->input_next_requested = 0;
267  if (pls->ctx) {
268  pls->ctx->pb = NULL;
269  avformat_close_input(&pls->ctx);
270  }
271  av_free(pls);
272  }
273  av_freep(&c->playlists);
274  c->n_playlists = 0;
275 }
276 
278 {
279  int i;
280  for (i = 0; i < c->n_variants; i++) {
281  struct variant *var = c->variants[i];
282  av_freep(&var->playlists);
283  av_free(var);
284  }
285  av_freep(&c->variants);
286  c->n_variants = 0;
287 }
288 
290 {
291  int i;
292  for (i = 0; i < c->n_renditions; i++)
293  av_freep(&c->renditions[i]);
294  av_freep(&c->renditions);
295  c->n_renditions = 0;
296 }
297 
298 /*
299  * Used to reset a statically allocated AVPacket to a clean state,
300  * containing no data.
301  */
302 static void reset_packet(AVPacket *pkt)
303 {
304  av_init_packet(pkt);
305  pkt->data = NULL;
306 }
307 
308 static struct playlist *new_playlist(HLSContext *c, const char *url,
309  const char *base)
310 {
311  struct playlist *pls = av_mallocz(sizeof(struct playlist));
312  if (!pls)
313  return NULL;
314  reset_packet(&pls->pkt);
315  ff_make_absolute_url(pls->url, sizeof(pls->url), base, url);
316  if (!pls->url[0]) {
317  av_free(pls);
318  return NULL;
319  }
321 
322  pls->is_id3_timestamped = -1;
324 
325  dynarray_add(&c->playlists, &c->n_playlists, pls);
326  return pls;
327 }
328 
329 struct variant_info {
330  char bandwidth[20];
331  /* variant group ids: */
332  char audio[MAX_FIELD_LEN];
333  char video[MAX_FIELD_LEN];
334  char subtitles[MAX_FIELD_LEN];
335 };
336 
337 static struct variant *new_variant(HLSContext *c, struct variant_info *info,
338  const char *url, const char *base)
339 {
340  struct variant *var;
341  struct playlist *pls;
342 
343  pls = new_playlist(c, url, base);
344  if (!pls)
345  return NULL;
346 
347  var = av_mallocz(sizeof(struct variant));
348  if (!var)
349  return NULL;
350 
351  if (info) {
352  var->bandwidth = atoi(info->bandwidth);
353  strcpy(var->audio_group, info->audio);
354  strcpy(var->video_group, info->video);
355  strcpy(var->subtitles_group, info->subtitles);
356  }
357 
358  dynarray_add(&c->variants, &c->n_variants, var);
359  dynarray_add(&var->playlists, &var->n_playlists, pls);
360  return var;
361 }
362 
363 static void handle_variant_args(struct variant_info *info, const char *key,
364  int key_len, char **dest, int *dest_len)
365 {
366  if (!strncmp(key, "BANDWIDTH=", key_len)) {
367  *dest = info->bandwidth;
368  *dest_len = sizeof(info->bandwidth);
369  } else if (!strncmp(key, "AUDIO=", key_len)) {
370  *dest = info->audio;
371  *dest_len = sizeof(info->audio);
372  } else if (!strncmp(key, "VIDEO=", key_len)) {
373  *dest = info->video;
374  *dest_len = sizeof(info->video);
375  } else if (!strncmp(key, "SUBTITLES=", key_len)) {
376  *dest = info->subtitles;
377  *dest_len = sizeof(info->subtitles);
378  }
379 }
380 
381 struct key_info {
382  char uri[MAX_URL_SIZE];
383  char method[11];
384  char iv[35];
385 };
386 
387 static void handle_key_args(struct key_info *info, const char *key,
388  int key_len, char **dest, int *dest_len)
389 {
390  if (!strncmp(key, "METHOD=", key_len)) {
391  *dest = info->method;
392  *dest_len = sizeof(info->method);
393  } else if (!strncmp(key, "URI=", key_len)) {
394  *dest = info->uri;
395  *dest_len = sizeof(info->uri);
396  } else if (!strncmp(key, "IV=", key_len)) {
397  *dest = info->iv;
398  *dest_len = sizeof(info->iv);
399  }
400 }
401 
403  char uri[MAX_URL_SIZE];
404  char byterange[32];
405 };
406 
407 static struct segment *new_init_section(struct playlist *pls,
408  struct init_section_info *info,
409  const char *url_base)
410 {
411  struct segment *sec;
412  char tmp_str[MAX_URL_SIZE], *ptr = tmp_str;
413 
414  if (!info->uri[0])
415  return NULL;
416 
417  sec = av_mallocz(sizeof(*sec));
418  if (!sec)
419  return NULL;
420 
421  if (!av_strncasecmp(info->uri, "data:", 5)) {
422  ptr = info->uri;
423  } else {
424  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url_base, info->uri);
425  if (!tmp_str[0]) {
426  av_free(sec);
427  return NULL;
428  }
429  }
430  sec->url = av_strdup(ptr);
431  if (!sec->url) {
432  av_free(sec);
433  return NULL;
434  }
435 
436  if (info->byterange[0]) {
437  sec->size = strtoll(info->byterange, NULL, 10);
438  ptr = strchr(info->byterange, '@');
439  if (ptr)
440  sec->url_offset = strtoll(ptr+1, NULL, 10);
441  } else {
442  /* the entire file is the init section */
443  sec->size = -1;
444  }
445 
446  dynarray_add(&pls->init_sections, &pls->n_init_sections, sec);
447 
448  return sec;
449 }
450 
451 static void handle_init_section_args(struct init_section_info *info, const char *key,
452  int key_len, char **dest, int *dest_len)
453 {
454  if (!strncmp(key, "URI=", key_len)) {
455  *dest = info->uri;
456  *dest_len = sizeof(info->uri);
457  } else if (!strncmp(key, "BYTERANGE=", key_len)) {
458  *dest = info->byterange;
459  *dest_len = sizeof(info->byterange);
460  }
461 }
462 
464  char type[16];
465  char uri[MAX_URL_SIZE];
466  char group_id[MAX_FIELD_LEN];
467  char language[MAX_FIELD_LEN];
468  char assoc_language[MAX_FIELD_LEN];
470  char defaultr[4];
471  char forced[4];
472  char characteristics[MAX_CHARACTERISTICS_LEN];
473 };
474 
475 static struct rendition *new_rendition(HLSContext *c, struct rendition_info *info,
476  const char *url_base)
477 {
478  struct rendition *rend;
480  char *characteristic;
481  char *chr_ptr;
482  char *saveptr;
483 
484  if (!strcmp(info->type, "AUDIO"))
485  type = AVMEDIA_TYPE_AUDIO;
486  else if (!strcmp(info->type, "VIDEO"))
487  type = AVMEDIA_TYPE_VIDEO;
488  else if (!strcmp(info->type, "SUBTITLES"))
489  type = AVMEDIA_TYPE_SUBTITLE;
490  else if (!strcmp(info->type, "CLOSED-CAPTIONS"))
491  /* CLOSED-CAPTIONS is ignored since we do not support CEA-608 CC in
492  * AVC SEI RBSP anyway */
493  return NULL;
494 
495  if (type == AVMEDIA_TYPE_UNKNOWN) {
496  av_log(c->ctx, AV_LOG_WARNING, "Can't support the type: %s\n", info->type);
497  return NULL;
498  }
499 
500  /* URI is mandatory for subtitles as per spec */
501  if (type == AVMEDIA_TYPE_SUBTITLE && !info->uri[0]) {
502  av_log(c->ctx, AV_LOG_ERROR, "The URI tag is REQUIRED for subtitle.\n");
503  return NULL;
504  }
505 
506  /* TODO: handle subtitles (each segment has to parsed separately) */
508  if (type == AVMEDIA_TYPE_SUBTITLE) {
509  av_log(c->ctx, AV_LOG_WARNING, "Can't support the subtitle(uri: %s)\n", info->uri);
510  return NULL;
511  }
512 
513  rend = av_mallocz(sizeof(struct rendition));
514  if (!rend)
515  return NULL;
516 
517  dynarray_add(&c->renditions, &c->n_renditions, rend);
518 
519  rend->type = type;
520  strcpy(rend->group_id, info->group_id);
521  strcpy(rend->language, info->language);
522  strcpy(rend->name, info->name);
523 
524  /* add the playlist if this is an external rendition */
525  if (info->uri[0]) {
526  rend->playlist = new_playlist(c, info->uri, url_base);
527  if (rend->playlist)
529  &rend->playlist->n_renditions, rend);
530  }
531 
532  if (info->assoc_language[0]) {
533  int langlen = strlen(rend->language);
534  if (langlen < sizeof(rend->language) - 3) {
535  rend->language[langlen] = ',';
536  strncpy(rend->language + langlen + 1, info->assoc_language,
537  sizeof(rend->language) - langlen - 2);
538  }
539  }
540 
541  if (!strcmp(info->defaultr, "YES"))
543  if (!strcmp(info->forced, "YES"))
545 
546  chr_ptr = info->characteristics;
547  while ((characteristic = av_strtok(chr_ptr, ",", &saveptr))) {
548  if (!strcmp(characteristic, "public.accessibility.describes-music-and-sound"))
550  else if (!strcmp(characteristic, "public.accessibility.describes-video"))
552 
553  chr_ptr = NULL;
554  }
555 
556  return rend;
557 }
558 
559 static void handle_rendition_args(struct rendition_info *info, const char *key,
560  int key_len, char **dest, int *dest_len)
561 {
562  if (!strncmp(key, "TYPE=", key_len)) {
563  *dest = info->type;
564  *dest_len = sizeof(info->type);
565  } else if (!strncmp(key, "URI=", key_len)) {
566  *dest = info->uri;
567  *dest_len = sizeof(info->uri);
568  } else if (!strncmp(key, "GROUP-ID=", key_len)) {
569  *dest = info->group_id;
570  *dest_len = sizeof(info->group_id);
571  } else if (!strncmp(key, "LANGUAGE=", key_len)) {
572  *dest = info->language;
573  *dest_len = sizeof(info->language);
574  } else if (!strncmp(key, "ASSOC-LANGUAGE=", key_len)) {
575  *dest = info->assoc_language;
576  *dest_len = sizeof(info->assoc_language);
577  } else if (!strncmp(key, "NAME=", key_len)) {
578  *dest = info->name;
579  *dest_len = sizeof(info->name);
580  } else if (!strncmp(key, "DEFAULT=", key_len)) {
581  *dest = info->defaultr;
582  *dest_len = sizeof(info->defaultr);
583  } else if (!strncmp(key, "FORCED=", key_len)) {
584  *dest = info->forced;
585  *dest_len = sizeof(info->forced);
586  } else if (!strncmp(key, "CHARACTERISTICS=", key_len)) {
587  *dest = info->characteristics;
588  *dest_len = sizeof(info->characteristics);
589  }
590  /*
591  * ignored:
592  * - AUTOSELECT: client may autoselect based on e.g. system language
593  * - INSTREAM-ID: EIA-608 closed caption number ("CC1".."CC4")
594  */
595 }
596 
597 /* used by parse_playlist to allocate a new variant+playlist when the
598  * playlist is detected to be a Media Playlist (not Master Playlist)
599  * and we have no parent Master Playlist (parsing of which would have
600  * allocated the variant and playlist already)
601  * *pls == NULL => Master Playlist or parentless Media Playlist
602  * *pls != NULL => parented Media Playlist, playlist+variant allocated */
603 static int ensure_playlist(HLSContext *c, struct playlist **pls, const char *url)
604 {
605  if (*pls)
606  return 0;
607  if (!new_variant(c, NULL, url, NULL))
608  return AVERROR(ENOMEM);
609  *pls = c->playlists[c->n_playlists - 1];
610  return 0;
611 }
612 
614  const char *url, AVDictionary **options)
615 {
616 #if !CONFIG_HTTP_PROTOCOL
618 #else
619  int ret;
620  URLContext *uc = ffio_geturlcontext(*pb);
621  av_assert0(uc);
622  (*pb)->eof_reached = 0;
623  ret = ff_http_do_new_request2(uc, url, options);
624  if (ret < 0) {
625  ff_format_io_close(s, pb);
626  }
627  return ret;
628 #endif
629 }
630 
631 static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url,
632  AVDictionary **opts, AVDictionary *opts2, int *is_http_out)
633 {
634  HLSContext *c = s->priv_data;
635  AVDictionary *tmp = NULL;
636  const char *proto_name = NULL;
637  int ret;
638  int is_http = 0;
639 
640  if (av_strstart(url, "crypto", NULL)) {
641  if (url[6] == '+' || url[6] == ':')
642  proto_name = avio_find_protocol_name(url + 7);
643  } else if (av_strstart(url, "data", NULL)) {
644  if (url[4] == '+' || url[4] == ':')
645  proto_name = avio_find_protocol_name(url + 5);
646  }
647 
648  if (!proto_name)
649  proto_name = avio_find_protocol_name(url);
650 
651  if (!proto_name)
652  return AVERROR_INVALIDDATA;
653 
654  // only http(s) & file are allowed
655  if (av_strstart(proto_name, "file", NULL)) {
656  if (strcmp(c->allowed_extensions, "ALL") && !av_match_ext(url, c->allowed_extensions)) {
657  av_log(s, AV_LOG_ERROR,
658  "Filename extension of \'%s\' is not a common multimedia extension, blocked for security reasons.\n"
659  "If you wish to override this adjust allowed_extensions, you can set it to \'ALL\' to allow all\n",
660  url);
661  return AVERROR_INVALIDDATA;
662  }
663  } else if (av_strstart(proto_name, "http", NULL)) {
664  is_http = 1;
665  } else if (av_strstart(proto_name, "data", NULL)) {
666  ;
667  } else
668  return AVERROR_INVALIDDATA;
669 
670  if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':')
671  ;
672  else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':')
673  ;
674  else if (av_strstart(url, "data", NULL) && !strncmp(proto_name, url + 5, strlen(proto_name)) && url[5 + strlen(proto_name)] == ':')
675  ;
676  else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))
677  return AVERROR_INVALIDDATA;
678 
679  av_dict_copy(&tmp, *opts, 0);
680  av_dict_copy(&tmp, opts2, 0);
681 
682  if (is_http && c->http_persistent && *pb) {
683  ret = open_url_keepalive(c->ctx, pb, url, &tmp);
684  if (ret == AVERROR_EXIT) {
685  av_dict_free(&tmp);
686  return ret;
687  } else if (ret < 0) {
688  if (ret != AVERROR_EOF)
690  "keepalive request failed for '%s' with error: '%s' when opening url, retrying with new connection\n",
691  url, av_err2str(ret));
692  ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
693  }
694  } else {
695  ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
696  }
697  if (ret >= 0) {
698  // update cookies on http response with setcookies.
699  char *new_cookies = NULL;
700 
701  if (!(s->flags & AVFMT_FLAG_CUSTOM_IO))
702  av_opt_get(*pb, "cookies", AV_OPT_SEARCH_CHILDREN, (uint8_t**)&new_cookies);
703 
704  if (new_cookies)
705  av_dict_set(opts, "cookies", new_cookies, AV_DICT_DONT_STRDUP_VAL);
706  }
707 
708  av_dict_free(&tmp);
709 
710  if (is_http_out)
711  *is_http_out = is_http;
712 
713  return ret;
714 }
715 
716 static int test_segment(AVFormatContext *s, const AVInputFormat *in_fmt, struct playlist *pls, struct segment *seg)
717 {
718  HLSContext *c = s->priv_data;
719  int matchA = 3;
720  int matchF = 0;
721 
722  if (!c->extension_picky)
723  return 0;
724 
725  if (strcmp(c->allowed_extensions, "ALL"))
726  matchA = av_match_ext (seg->url, c->allowed_extensions)
727  + 2*(ff_match_url_ext(seg->url, c->allowed_extensions) > 0);
728 
729  if (!matchA) {
730  av_log(s, AV_LOG_ERROR, "URL %s is not in allowed_extensions\n", seg->url);
731  return AVERROR_INVALIDDATA;
732  }
733 
734  if (in_fmt) {
735  if (in_fmt->extensions) {
736  matchF = av_match_ext( seg->url, in_fmt->extensions)
737  + 2*(ff_match_url_ext(seg->url, in_fmt->extensions) > 0);
738  if(av_match_name("mp4", in_fmt->name)) {
739  matchF |= av_match_ext( seg->url, "ts,m2t,m2ts,mts,mpg,m4s,mpeg,mpegts")
740  + 2*(ff_match_url_ext(seg->url, "ts,m2t,m2ts,mts,mpg,m4s,mpeg,mpegts") > 0);
741  }
742  } else if (!strcmp(in_fmt->name, "mpegts")) {
743  matchF = av_match_ext( seg->url, "ts,m2t,m2ts,mts,mpg,m4s,mpeg,mpegts")
744  + 2*(ff_match_url_ext(seg->url, "ts,m2t,m2ts,mts,mpg,m4s,mpeg,mpegts") > 0);
745  }
746 
747  if (!(matchA & matchF)) {
748  av_log(s, AV_LOG_ERROR, "detected format %s extension %s mismatches allowed extensions in url %s\n", in_fmt->name, in_fmt->extensions ? in_fmt->extensions : "none", seg->url);
749  return AVERROR_INVALIDDATA;
750  }
751  }
752 
753  return 0;
754 }
755 
756 static int parse_playlist(HLSContext *c, const char *url,
757  struct playlist *pls, AVIOContext *in)
758 {
759  int ret = 0, is_segment = 0, is_variant = 0;
760  int64_t duration = 0;
761  enum KeyType key_type = KEY_NONE;
762  uint8_t iv[16] = "";
763  int has_iv = 0;
764  char key[MAX_URL_SIZE] = "";
765  char line[MAX_URL_SIZE];
766  const char *ptr;
767  int close_in = 0;
768  int64_t seg_offset = 0;
769  int64_t seg_size = -1;
770  uint8_t *new_url = NULL;
771  struct variant_info variant_info;
772  char tmp_str[MAX_URL_SIZE];
773  struct segment *cur_init_section = NULL;
774  int is_http = av_strstart(url, "http", NULL);
775  struct segment **prev_segments = NULL;
776  int prev_n_segments = 0;
777  int prev_start_seq_no = -1;
778 
779  if (is_http && !in && c->http_persistent && c->playlist_pb) {
780  in = c->playlist_pb;
781  ret = open_url_keepalive(c->ctx, &c->playlist_pb, url, NULL);
782  if (ret == AVERROR_EXIT) {
783  return ret;
784  } else if (ret < 0) {
785  if (ret != AVERROR_EOF)
787  "keepalive request failed for '%s' with error: '%s' when parsing playlist\n",
788  url, av_err2str(ret));
789  in = NULL;
790  }
791  }
792 
793  if (!in) {
795  av_dict_copy(&opts, c->avio_opts, 0);
796 
797  if (c->http_persistent)
798  av_dict_set(&opts, "multiple_requests", "1", 0);
799 
800  ret = c->ctx->io_open(c->ctx, &in, url, AVIO_FLAG_READ, &opts);
801  av_dict_free(&opts);
802  if (ret < 0)
803  return ret;
804 
805  if (is_http && c->http_persistent)
806  c->playlist_pb = in;
807  else
808  close_in = 1;
809  }
810 
811  if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >= 0)
812  url = new_url;
813 
814  ff_get_chomp_line(in, line, sizeof(line));
815  if (strcmp(line, "#EXTM3U")) {
816  ret = AVERROR_INVALIDDATA;
817  goto fail;
818  }
819 
820  if (pls) {
821  prev_start_seq_no = pls->start_seq_no;
822  prev_segments = pls->segments;
823  prev_n_segments = pls->n_segments;
824  pls->segments = NULL;
825  pls->n_segments = 0;
826 
827  pls->finished = 0;
828  pls->type = PLS_TYPE_UNSPECIFIED;
829  }
830  while (!avio_feof(in)) {
831  ff_get_chomp_line(in, line, sizeof(line));
832  if (av_strstart(line, "#EXT-X-STREAM-INF:", &ptr)) {
833  is_variant = 1;
834  memset(&variant_info, 0, sizeof(variant_info));
836  &variant_info);
837  } else if (av_strstart(line, "#EXT-X-KEY:", &ptr)) {
838  struct key_info info = {{0}};
840  &info);
841  key_type = KEY_NONE;
842  has_iv = 0;
843  if (!strcmp(info.method, "AES-128"))
844  key_type = KEY_AES_128;
845  if (!strcmp(info.method, "SAMPLE-AES"))
846  key_type = KEY_SAMPLE_AES;
847  if (!strncmp(info.iv, "0x", 2) || !strncmp(info.iv, "0X", 2)) {
848  ff_hex_to_data(iv, info.iv + 2);
849  has_iv = 1;
850  }
851  av_strlcpy(key, info.uri, sizeof(key));
852  } else if (av_strstart(line, "#EXT-X-MEDIA:", &ptr)) {
853  struct rendition_info info = {{0}};
855  &info);
856  new_rendition(c, &info, url);
857  } else if (av_strstart(line, "#EXT-X-TARGETDURATION:", &ptr)) {
858  int64_t t;
859  ret = ensure_playlist(c, &pls, url);
860  if (ret < 0)
861  goto fail;
862  t = strtoll(ptr, NULL, 10);
863  if (t < 0 || t >= INT64_MAX / AV_TIME_BASE) {
864  ret = AVERROR_INVALIDDATA;
865  goto fail;
866  }
867  pls->target_duration = t * AV_TIME_BASE;
868  } else if (av_strstart(line, "#EXT-X-MEDIA-SEQUENCE:", &ptr)) {
869  ret = ensure_playlist(c, &pls, url);
870  if (ret < 0)
871  goto fail;
872  pls->start_seq_no = atoi(ptr);
873  } else if (av_strstart(line, "#EXT-X-PLAYLIST-TYPE:", &ptr)) {
874  ret = ensure_playlist(c, &pls, url);
875  if (ret < 0)
876  goto fail;
877  if (!strcmp(ptr, "EVENT"))
878  pls->type = PLS_TYPE_EVENT;
879  else if (!strcmp(ptr, "VOD"))
880  pls->type = PLS_TYPE_VOD;
881  } else if (av_strstart(line, "#EXT-X-MAP:", &ptr)) {
882  struct init_section_info info = {{0}};
883  ret = ensure_playlist(c, &pls, url);
884  if (ret < 0)
885  goto fail;
887  &info);
888  cur_init_section = new_init_section(pls, &info, url);
889  cur_init_section->key_type = key_type;
890  if (has_iv) {
891  memcpy(cur_init_section->iv, iv, sizeof(iv));
892  } else {
893  int seq = pls->start_seq_no + pls->n_segments;
894  memset(cur_init_section->iv, 0, sizeof(cur_init_section->iv));
895  AV_WB32(cur_init_section->iv + 12, seq);
896  }
897 
898  if (key_type != KEY_NONE) {
899  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, key);
900  if (!tmp_str[0]) {
901  av_free(cur_init_section);
902  ret = AVERROR_INVALIDDATA;
903  goto fail;
904  }
905  cur_init_section->key = av_strdup(tmp_str);
906  if (!cur_init_section->key) {
907  av_free(cur_init_section);
908  ret = AVERROR(ENOMEM);
909  goto fail;
910  }
911  } else {
912  cur_init_section->key = NULL;
913  }
914 
915  } else if (av_strstart(line, "#EXT-X-ENDLIST", &ptr)) {
916  if (pls)
917  pls->finished = 1;
918  } else if (av_strstart(line, "#EXTINF:", &ptr)) {
919  is_segment = 1;
920  duration = atof(ptr) * AV_TIME_BASE;
921  } else if (av_strstart(line, "#EXT-X-BYTERANGE:", &ptr)) {
922  seg_size = strtoll(ptr, NULL, 10);
923  ptr = strchr(ptr, '@');
924  if (ptr)
925  seg_offset = strtoll(ptr+1, NULL, 10);
926  } else if (av_strstart(line, "#", NULL)) {
927  av_log(c->ctx, AV_LOG_INFO, "Skip ('%s')\n", line);
928  continue;
929  } else if (line[0]) {
930  if (is_variant) {
931  if (!new_variant(c, &variant_info, line, url)) {
932  ret = AVERROR(ENOMEM);
933  goto fail;
934  }
935  is_variant = 0;
936  }
937  if (is_segment) {
938  struct segment *seg;
939  ret = ensure_playlist(c, &pls, url);
940  if (ret < 0)
941  goto fail;
942  seg = av_malloc(sizeof(struct segment));
943  if (!seg) {
944  ret = AVERROR(ENOMEM);
945  goto fail;
946  }
947  if (has_iv) {
948  memcpy(seg->iv, iv, sizeof(iv));
949  } else {
950  int seq = pls->start_seq_no + pls->n_segments;
951  memset(seg->iv, 0, sizeof(seg->iv));
952  AV_WB32(seg->iv + 12, seq);
953  }
954 
955  if (key_type != KEY_NONE) {
956  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, key);
957  if (!tmp_str[0]) {
958  ret = AVERROR_INVALIDDATA;
959  av_free(seg);
960  goto fail;
961  }
962  seg->key = av_strdup(tmp_str);
963  if (!seg->key) {
964  av_free(seg);
965  ret = AVERROR(ENOMEM);
966  goto fail;
967  }
968  } else {
969  seg->key = NULL;
970  }
971 
972  ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, line);
973  if (!tmp_str[0]) {
974  ret = AVERROR_INVALIDDATA;
975  if (seg->key)
976  av_free(seg->key);
977  av_free(seg);
978  goto fail;
979  }
980  seg->url = av_strdup(tmp_str);
981  if (!seg->url) {
982  av_free(seg->key);
983  av_free(seg);
984  ret = AVERROR(ENOMEM);
985  goto fail;
986  }
987 
988  ret = test_segment(c->ctx, pls->ctx ? pls->ctx->iformat : NULL, pls, seg);
989  if (ret < 0) {
990  av_free(seg->url);
991  av_free(seg->key);
992  av_free(seg);
993  goto fail;
994  }
995 
996  if (duration < 0.001 * AV_TIME_BASE) {
997  av_log(c->ctx, AV_LOG_WARNING, "Cannot get correct #EXTINF value of segment %s,"
998  " set to default value to 1ms.\n", seg->url);
999  duration = 0.001 * AV_TIME_BASE;
1000  }
1001  seg->duration = duration;
1002  seg->key_type = key_type;
1003  dynarray_add(&pls->segments, &pls->n_segments, seg);
1004  is_segment = 0;
1005 
1006  seg->size = seg_size;
1007  if (seg_size >= 0) {
1008  seg->url_offset = seg_offset;
1009  seg_offset += seg_size;
1010  seg_size = -1;
1011  } else {
1012  seg->url_offset = 0;
1013  seg_offset = 0;
1014  }
1015 
1016  seg->init_section = cur_init_section;
1017  }
1018  }
1019  }
1020  if (prev_segments) {
1021  if (pls->start_seq_no > prev_start_seq_no && c->first_timestamp != AV_NOPTS_VALUE) {
1022  int64_t prev_timestamp = c->first_timestamp;
1023  int i, diff = pls->start_seq_no - prev_start_seq_no;
1024  for (i = 0; i < prev_n_segments && i < diff; i++) {
1025  c->first_timestamp += prev_segments[i]->duration;
1026  }
1027  av_log(c->ctx, AV_LOG_DEBUG, "Media sequence change (%d -> %d)"
1028  " reflected in first_timestamp: %"PRId64" -> %"PRId64"\n",
1029  prev_start_seq_no, pls->start_seq_no,
1030  prev_timestamp, c->first_timestamp);
1031  } else if (pls->start_seq_no < prev_start_seq_no) {
1032  av_log(c->ctx, AV_LOG_WARNING, "Media sequence changed unexpectedly: %d -> %d\n",
1033  prev_start_seq_no, pls->start_seq_no);
1034  }
1035  free_segment_dynarray(prev_segments, prev_n_segments);
1036  av_freep(&prev_segments);
1037  }
1038  if (pls)
1040 
1041 fail:
1042  av_free(new_url);
1043  if (close_in)
1044  ff_format_io_close(c->ctx, &in);
1045  c->ctx->ctx_flags = c->ctx->ctx_flags & ~(unsigned)AVFMTCTX_UNSEEKABLE;
1046  if (!c->n_variants || !c->variants[0]->n_playlists ||
1047  !(c->variants[0]->playlists[0]->finished ||
1048  c->variants[0]->playlists[0]->type == PLS_TYPE_EVENT))
1050  return ret;
1051 }
1052 
1053 static struct segment *current_segment(struct playlist *pls)
1054 {
1055  return pls->segments[pls->cur_seq_no - pls->start_seq_no];
1056 }
1057 
1058 static struct segment *next_segment(struct playlist *pls)
1059 {
1060  int n = pls->cur_seq_no - pls->start_seq_no + 1;
1061  if (n >= pls->n_segments)
1062  return NULL;
1063  return pls->segments[n];
1064 }
1065 
1066 static int read_from_url(struct playlist *pls, struct segment *seg,
1067  uint8_t *buf, int buf_size)
1068 {
1069  int ret;
1070 
1071  /* limit read if the segment was only a part of a file */
1072  if (seg->size >= 0)
1073  buf_size = FFMIN(buf_size, seg->size - pls->cur_seg_offset);
1074 
1075  ret = avio_read(pls->input, buf, buf_size);
1076  if (ret > 0)
1077  pls->cur_seg_offset += ret;
1078 
1079  return ret;
1080 }
1081 
1082 /* Parse the raw ID3 data and pass contents to caller */
1084  AVDictionary **metadata, int64_t *dts,
1085  ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta **extra_meta)
1086 {
1087  static const char id3_priv_owner_ts[] = "com.apple.streaming.transportStreamTimestamp";
1088  ID3v2ExtraMeta *meta;
1089 
1090  ff_id3v2_read_dict(pb, metadata, ID3v2_DEFAULT_MAGIC, extra_meta);
1091  for (meta = *extra_meta; meta; meta = meta->next) {
1092  if (!strcmp(meta->tag, "PRIV")) {
1093  ID3v2ExtraMetaPRIV *priv = &meta->data.priv;
1094  if (priv->datasize == 8 && !strcmp(priv->owner, id3_priv_owner_ts)) {
1095  /* 33-bit MPEG timestamp */
1096  int64_t ts = AV_RB64(priv->data);
1097  av_log(s, AV_LOG_DEBUG, "HLS ID3 audio timestamp %"PRId64"\n", ts);
1098  if ((ts & ~((1ULL << 33) - 1)) == 0)
1099  *dts = ts;
1100  else
1101  av_log(s, AV_LOG_ERROR, "Invalid HLS ID3 audio timestamp %"PRId64"\n", ts);
1102  }
1103  } else if (!strcmp(meta->tag, "APIC") && apic)
1104  *apic = &meta->data.apic;
1105  }
1106 }
1107 
1108 /* Check if the ID3 metadata contents have changed */
1109 static int id3_has_changed_values(struct playlist *pls, AVDictionary *metadata,
1110  ID3v2ExtraMetaAPIC *apic)
1111 {
1112  AVDictionaryEntry *entry = NULL;
1113  AVDictionaryEntry *oldentry;
1114  /* check that no keys have changed values */
1115  while ((entry = av_dict_get(metadata, "", entry, AV_DICT_IGNORE_SUFFIX))) {
1116  oldentry = av_dict_get(pls->id3_initial, entry->key, NULL, AV_DICT_MATCH_CASE);
1117  if (!oldentry || strcmp(oldentry->value, entry->value) != 0)
1118  return 1;
1119  }
1120 
1121  /* check if apic appeared */
1122  if (apic && (pls->ctx->nb_streams != 2 || !pls->ctx->streams[1]->attached_pic.data))
1123  return 1;
1124 
1125  if (apic) {
1126  int size = pls->ctx->streams[1]->attached_pic.size;
1127  if (size != apic->buf->size - AV_INPUT_BUFFER_PADDING_SIZE)
1128  return 1;
1129 
1130  if (memcmp(apic->buf->data, pls->ctx->streams[1]->attached_pic.data, size) != 0)
1131  return 1;
1132  }
1133 
1134  return 0;
1135 }
1136 
1137 /* Parse ID3 data and handle the found data */
1138 static void handle_id3(AVIOContext *pb, struct playlist *pls)
1139 {
1140  AVDictionary *metadata = NULL;
1141  ID3v2ExtraMetaAPIC *apic = NULL;
1142  ID3v2ExtraMeta *extra_meta = NULL;
1143  int64_t timestamp = AV_NOPTS_VALUE;
1144 
1145  parse_id3(pls->ctx, pb, &metadata, &timestamp, &apic, &extra_meta);
1146 
1147  if (timestamp != AV_NOPTS_VALUE) {
1148  pls->id3_mpegts_timestamp = timestamp;
1149  pls->id3_offset = 0;
1150  }
1151 
1152  if (!pls->id3_found) {
1153  /* initial ID3 tags */
1155  pls->id3_found = 1;
1156 
1157  /* get picture attachment and set text metadata */
1158  if (pls->ctx->nb_streams)
1159  ff_id3v2_parse_apic(pls->ctx, extra_meta);
1160  else
1161  /* demuxer not yet opened, defer picture attachment */
1162  pls->id3_deferred_extra = extra_meta;
1163 
1164  ff_id3v2_parse_priv_dict(&metadata, extra_meta);
1165  av_dict_copy(&pls->ctx->metadata, metadata, 0);
1166  pls->id3_initial = metadata;
1167 
1168  } else {
1169  if (!pls->id3_changed && id3_has_changed_values(pls, metadata, apic)) {
1170  avpriv_report_missing_feature(pls->parent, "Changing ID3 metadata in HLS audio elementary stream");
1171  pls->id3_changed = 1;
1172  }
1173  av_dict_free(&metadata);
1174  }
1175 
1176  if (!pls->id3_deferred_extra)
1177  ff_id3v2_free_extra_meta(&extra_meta);
1178 }
1179 
1180 static void intercept_id3(struct playlist *pls, uint8_t *buf,
1181  int buf_size, int *len)
1182 {
1183  /* intercept id3 tags, we do not want to pass them to the raw
1184  * demuxer on all segment switches */
1185  int bytes;
1186  int id3_buf_pos = 0;
1187  int fill_buf = 0;
1188  struct segment *seg = current_segment(pls);
1189 
1190  /* gather all the id3 tags */
1191  while (1) {
1192  /* see if we can retrieve enough data for ID3 header */
1193  if (*len < ID3v2_HEADER_SIZE && buf_size >= ID3v2_HEADER_SIZE) {
1194  bytes = read_from_url(pls, seg, buf + *len, ID3v2_HEADER_SIZE - *len);
1195  if (bytes > 0) {
1196 
1197  if (bytes == ID3v2_HEADER_SIZE - *len)
1198  /* no EOF yet, so fill the caller buffer again after
1199  * we have stripped the ID3 tags */
1200  fill_buf = 1;
1201 
1202  *len += bytes;
1203 
1204  } else if (*len <= 0) {
1205  /* error/EOF */
1206  *len = bytes;
1207  fill_buf = 0;
1208  }
1209  }
1210 
1211  if (*len < ID3v2_HEADER_SIZE)
1212  break;
1213 
1214  if (ff_id3v2_match(buf, ID3v2_DEFAULT_MAGIC)) {
1215  int64_t maxsize = seg->size >= 0 ? seg->size : 1024*1024;
1216  int taglen = ff_id3v2_tag_len(buf);
1217  int tag_got_bytes = FFMIN(taglen, *len);
1218  int remaining = taglen - tag_got_bytes;
1219 
1220  if (taglen > maxsize) {
1221  av_log(pls->parent, AV_LOG_ERROR, "Too large HLS ID3 tag (%d > %"PRId64" bytes)\n",
1222  taglen, maxsize);
1223  break;
1224  }
1225 
1226  /*
1227  * Copy the id3 tag to our temporary id3 buffer.
1228  * We could read a small id3 tag directly without memcpy, but
1229  * we would still need to copy the large tags, and handling
1230  * both of those cases together with the possibility for multiple
1231  * tags would make the handling a bit complex.
1232  */
1233  pls->id3_buf = av_fast_realloc(pls->id3_buf, &pls->id3_buf_size, id3_buf_pos + taglen);
1234  if (!pls->id3_buf)
1235  break;
1236  memcpy(pls->id3_buf + id3_buf_pos, buf, tag_got_bytes);
1237  id3_buf_pos += tag_got_bytes;
1238 
1239  /* strip the intercepted bytes */
1240  *len -= tag_got_bytes;
1241  memmove(buf, buf + tag_got_bytes, *len);
1242  av_log(pls->parent, AV_LOG_DEBUG, "Stripped %d HLS ID3 bytes\n", tag_got_bytes);
1243 
1244  if (remaining > 0) {
1245  /* read the rest of the tag in */
1246  if (read_from_url(pls, seg, pls->id3_buf + id3_buf_pos, remaining) != remaining)
1247  break;
1248  id3_buf_pos += remaining;
1249  av_log(pls->parent, AV_LOG_DEBUG, "Stripped additional %d HLS ID3 bytes\n", remaining);
1250  }
1251 
1252  } else {
1253  /* no more ID3 tags */
1254  break;
1255  }
1256  }
1257 
1258  /* re-fill buffer for the caller unless EOF */
1259  if (*len >= 0 && (fill_buf || *len == 0)) {
1260  bytes = read_from_url(pls, seg, buf + *len, buf_size - *len);
1261 
1262  /* ignore error if we already had some data */
1263  if (bytes >= 0)
1264  *len += bytes;
1265  else if (*len == 0)
1266  *len = bytes;
1267  }
1268 
1269  if (pls->id3_buf) {
1270  /* Now parse all the ID3 tags */
1271  AVIOContext id3ioctx;
1272  ffio_init_context(&id3ioctx, pls->id3_buf, id3_buf_pos, 0, NULL, NULL, NULL, NULL);
1273  handle_id3(&id3ioctx, pls);
1274  }
1275 
1276  if (pls->is_id3_timestamped == -1)
1278 }
1279 
1280 static int open_input(HLSContext *c, struct playlist *pls, struct segment *seg, AVIOContext **in)
1281 {
1282  AVDictionary *opts = NULL;
1283  int ret;
1284  int is_http = 0;
1285 
1286  if (c->http_persistent)
1287  av_dict_set(&opts, "multiple_requests", "1", 0);
1288 
1289  if (seg->size >= 0) {
1290  /* try to restrict the HTTP request to the part we want
1291  * (if this is in fact a HTTP request) */
1292  av_dict_set_int(&opts, "offset", seg->url_offset, 0);
1293  av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
1294  }
1295 
1296  av_log(pls->parent, AV_LOG_VERBOSE, "HLS request for url '%s', offset %"PRId64", playlist %d\n",
1297  seg->url, seg->url_offset, pls->index);
1298 
1299  if (seg->key_type == KEY_NONE) {
1300  ret = open_url(pls->parent, in, seg->url, &c->avio_opts, opts, &is_http);
1301  } else if (seg->key_type == KEY_AES_128) {
1302  char iv[33], key[33], url[MAX_URL_SIZE];
1303  if (strcmp(seg->key, pls->key_url)) {
1304  AVIOContext *pb = NULL;
1305  if (open_url(pls->parent, &pb, seg->key, &c->avio_opts, opts, NULL) == 0) {
1306  ret = avio_read(pb, pls->key, sizeof(pls->key));
1307  if (ret != sizeof(pls->key)) {
1308  av_log(pls->parent, AV_LOG_ERROR, "Unable to read key file %s\n",
1309  seg->key);
1310  }
1311  ff_format_io_close(pls->parent, &pb);
1312  } else {
1313  av_log(pls->parent, AV_LOG_ERROR, "Unable to open key file %s\n",
1314  seg->key);
1315  }
1316  av_strlcpy(pls->key_url, seg->key, sizeof(pls->key_url));
1317  }
1318  ff_data_to_hex(iv, seg->iv, sizeof(seg->iv), 0);
1319  ff_data_to_hex(key, pls->key, sizeof(pls->key), 0);
1320  iv[32] = key[32] = '\0';
1321  if (strstr(seg->url, "://"))
1322  snprintf(url, sizeof(url), "crypto+%s", seg->url);
1323  else
1324  snprintf(url, sizeof(url), "crypto:%s", seg->url);
1325 
1326  av_dict_set(&opts, "key", key, 0);
1327  av_dict_set(&opts, "iv", iv, 0);
1328 
1329  ret = open_url(pls->parent, in, url, &c->avio_opts, opts, &is_http);
1330  if (ret < 0) {
1331  goto cleanup;
1332  }
1333  ret = 0;
1334  } else if (seg->key_type == KEY_SAMPLE_AES) {
1335  av_log(pls->parent, AV_LOG_ERROR,
1336  "SAMPLE-AES encryption is not supported yet\n");
1337  ret = AVERROR_PATCHWELCOME;
1338  }
1339  else
1340  ret = AVERROR(ENOSYS);
1341 
1342  /* Seek to the requested position. If this was a HTTP request, the offset
1343  * should already be where want it to, but this allows e.g. local testing
1344  * without a HTTP server.
1345  *
1346  * This is not done for HTTP at all as avio_seek() does internal bookkeeping
1347  * of file offset which is out-of-sync with the actual offset when "offset"
1348  * AVOption is used with http protocol, causing the seek to not be a no-op
1349  * as would be expected. Wrong offset received from the server will not be
1350  * noticed without the call, though.
1351  */
1352  if (ret == 0 && !is_http && seg->key_type == KEY_NONE && seg->url_offset) {
1353  int64_t seekret = avio_seek(*in, seg->url_offset, SEEK_SET);
1354  if (seekret < 0) {
1355  av_log(pls->parent, AV_LOG_ERROR, "Unable to seek to offset %"PRId64" of HLS segment '%s'\n", seg->url_offset, seg->url);
1356  ret = seekret;
1357  ff_format_io_close(pls->parent, in);
1358  }
1359  }
1360 
1361 cleanup:
1362  av_dict_free(&opts);
1363  pls->cur_seg_offset = 0;
1364  return ret;
1365 }
1366 
1367 static int update_init_section(struct playlist *pls, struct segment *seg)
1368 {
1369  static const int max_init_section_size = 1024*1024;
1370  HLSContext *c = pls->parent->priv_data;
1371  int64_t sec_size;
1372  int64_t urlsize;
1373  int ret;
1374 
1375  if (seg->init_section == pls->cur_init_section)
1376  return 0;
1377 
1378  pls->cur_init_section = NULL;
1379 
1380  if (!seg->init_section)
1381  return 0;
1382 
1383  ret = open_input(c, pls, seg->init_section, &pls->input);
1384  if (ret < 0) {
1386  "Failed to open an initialization section in playlist %d\n",
1387  pls->index);
1388  return ret;
1389  }
1390 
1391  if (seg->init_section->size >= 0)
1392  sec_size = seg->init_section->size;
1393  else if ((urlsize = avio_size(pls->input)) >= 0)
1394  sec_size = urlsize;
1395  else
1396  sec_size = max_init_section_size;
1397 
1398  av_log(pls->parent, AV_LOG_DEBUG,
1399  "Downloading an initialization section of size %"PRId64"\n",
1400  sec_size);
1401 
1402  sec_size = FFMIN(sec_size, max_init_section_size);
1403 
1404  av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size);
1405 
1406  ret = read_from_url(pls, seg->init_section, pls->init_sec_buf,
1407  pls->init_sec_buf_size);
1408  ff_format_io_close(pls->parent, &pls->input);
1409 
1410  if (ret < 0)
1411  return ret;
1412 
1413  pls->cur_init_section = seg->init_section;
1414  pls->init_sec_data_len = ret;
1415  pls->init_sec_buf_read_offset = 0;
1416 
1417  /* spec says audio elementary streams do not have media initialization
1418  * sections, so there should be no ID3 timestamps */
1419  pls->is_id3_timestamped = 0;
1420 
1421  return 0;
1422 }
1423 
1425 {
1426  return pls->n_segments > 0 ?
1427  pls->segments[pls->n_segments - 1]->duration :
1428  pls->target_duration;
1429 }
1430 
1431 static int playlist_needed(struct playlist *pls)
1432 {
1433  AVFormatContext *s = pls->parent;
1434  int i, j;
1435  int stream_needed = 0;
1436  int first_st;
1437 
1438  /* If there is no context or streams yet, the playlist is needed */
1439  if (!pls->ctx || !pls->n_main_streams)
1440  return 1;
1441 
1442  /* check if any of the streams in the playlist are needed */
1443  for (i = 0; i < pls->n_main_streams; i++) {
1444  if (pls->main_streams[i]->discard < AVDISCARD_ALL) {
1445  stream_needed = 1;
1446  break;
1447  }
1448  }
1449 
1450  /* If all streams in the playlist were discarded, the playlist is not
1451  * needed (regardless of whether whole programs are discarded or not). */
1452  if (!stream_needed)
1453  return 0;
1454 
1455  /* Otherwise, check if all the programs (variants) this playlist is in are
1456  * discarded. Since all streams in the playlist are part of the same programs
1457  * we can just check the programs of the first stream. */
1458 
1459  first_st = pls->main_streams[0]->index;
1460 
1461  for (i = 0; i < s->nb_programs; i++) {
1462  AVProgram *program = s->programs[i];
1463  if (program->discard < AVDISCARD_ALL) {
1464  for (j = 0; j < program->nb_stream_indexes; j++) {
1465  if (program->stream_index[j] == first_st) {
1466  /* playlist is in an undiscarded program */
1467  return 1;
1468  }
1469  }
1470  }
1471  }
1472 
1473  /* some streams were not discarded but all the programs were */
1474  return 0;
1475 }
1476 
1477 static int read_data(void *opaque, uint8_t *buf, int buf_size)
1478 {
1479  struct playlist *v = opaque;
1480  HLSContext *c = v->parent->priv_data;
1481  int ret;
1482  int just_opened = 0;
1483  int reload_count = 0;
1484  struct segment *seg;
1485 
1486 restart:
1487  if (!v->needed)
1488  return AVERROR_EOF;
1489 
1490  if (!v->input || (c->http_persistent && v->input_read_done)) {
1491  int64_t reload_interval;
1492 
1493  /* Check that the playlist is still needed before opening a new
1494  * segment. */
1495  v->needed = playlist_needed(v);
1496 
1497  if (!v->needed) {
1498  av_log(v->parent, AV_LOG_INFO, "No longer receiving playlist %d ('%s')\n",
1499  v->index, v->url);
1500  return AVERROR_EOF;
1501  }
1502 
1503  /* If this is a live stream and the reload interval has elapsed since
1504  * the last playlist reload, reload the playlists now. */
1505  reload_interval = default_reload_interval(v);
1506 
1507 reload:
1508  reload_count++;
1509  if (reload_count > c->max_reload)
1510  return AVERROR_EOF;
1511  if (!v->finished &&
1512  av_gettime_relative() - v->last_load_time >= reload_interval) {
1513  if ((ret = parse_playlist(c, v->url, v, NULL)) < 0) {
1514  if (ret != AVERROR_EXIT)
1515  av_log(v->parent, AV_LOG_WARNING, "Failed to reload playlist %d\n",
1516  v->index);
1517  return ret;
1518  }
1519  /* If we need to reload the playlist again below (if
1520  * there's still no more segments), switch to a reload
1521  * interval of half the target duration. */
1522  reload_interval = v->target_duration / 2;
1523  }
1524  if (v->cur_seq_no < v->start_seq_no) {
1526  "skipping %d segments ahead, expired from playlists\n",
1527  v->start_seq_no - v->cur_seq_no);
1528  v->cur_seq_no = v->start_seq_no;
1529  }
1530  if (v->cur_seq_no > v->last_seq_no) {
1531  v->last_seq_no = v->cur_seq_no;
1532  v->m3u8_hold_counters = 0;
1533  } else if (v->last_seq_no == v->cur_seq_no) {
1534  v->m3u8_hold_counters++;
1535  if (v->m3u8_hold_counters >= c->m3u8_hold_counters) {
1536  return AVERROR_EOF;
1537  }
1538  } else {
1539  av_log(v->parent, AV_LOG_WARNING, "maybe the m3u8 list sequence have been wraped.\n");
1540  }
1541  if (v->cur_seq_no >= v->start_seq_no + v->n_segments) {
1542  if (v->finished)
1543  return AVERROR_EOF;
1544  while (av_gettime_relative() - v->last_load_time < reload_interval) {
1546  return AVERROR_EXIT;
1547  av_usleep(100*1000);
1548  }
1549  /* Enough time has elapsed since the last reload */
1550  goto reload;
1551  }
1552 
1553  v->input_read_done = 0;
1554  seg = current_segment(v);
1555 
1556  /* load/update Media Initialization Section, if any */
1557  ret = update_init_section(v, seg);
1558  if (ret)
1559  return ret;
1560 
1561  if (c->http_multiple == 1 && v->input_next_requested) {
1562  FFSWAP(AVIOContext *, v->input, v->input_next);
1563  v->cur_seg_offset = 0;
1564  v->input_next_requested = 0;
1565  ret = 0;
1566  } else {
1567  ret = open_input(c, v, seg, &v->input);
1568  }
1569  if (ret < 0) {
1571  return AVERROR_EXIT;
1572  av_log(v->parent, AV_LOG_WARNING, "Failed to open segment %d of playlist %d\n",
1573  v->cur_seq_no,
1574  v->index);
1575  v->cur_seq_no += 1;
1576  goto reload;
1577  }
1578  just_opened = 1;
1579  }
1580 
1581  if (c->http_multiple == -1) {
1582  uint8_t *http_version_opt = NULL;
1583  int r = av_opt_get(v->input, "http_version", AV_OPT_SEARCH_CHILDREN, &http_version_opt);
1584  if (r >= 0) {
1585  c->http_multiple = (!strncmp((const char *)http_version_opt, "1.1", 3) || !strncmp((const char *)http_version_opt, "2.0", 3));
1586  av_freep(&http_version_opt);
1587  }
1588  }
1589 
1590  seg = next_segment(v);
1591  if (c->http_multiple == 1 && !v->input_next_requested &&
1592  seg && seg->key_type == KEY_NONE && av_strstart(seg->url, "http", NULL)) {
1593  ret = open_input(c, v, seg, &v->input_next);
1594  if (ret < 0) {
1596  return AVERROR_EXIT;
1597  av_log(v->parent, AV_LOG_WARNING, "Failed to open next segment %d of playlist %d\n",
1598  v->cur_seq_no + 1,
1599  v->index);
1600  } else {
1601  v->input_next_requested = 1;
1602  }
1603  }
1604 
1606  /* Push init section out first before first actual segment */
1607  int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size);
1608  memcpy(buf, v->init_sec_buf, copy_size);
1609  v->init_sec_buf_read_offset += copy_size;
1610  return copy_size;
1611  }
1612 
1613  seg = current_segment(v);
1614  ret = read_from_url(v, seg, buf, buf_size);
1615  if (ret > 0) {
1616  if (just_opened && v->is_id3_timestamped != 0) {
1617  /* Intercept ID3 tags here, elementary audio streams are required
1618  * to convey timestamps using them in the beginning of each segment. */
1619  intercept_id3(v, buf, buf_size, &ret);
1620  }
1621 
1622  return ret;
1623  }
1624  if (c->http_persistent &&
1625  seg->key_type == KEY_NONE && av_strstart(seg->url, "http", NULL)) {
1626  v->input_read_done = 1;
1627  } else {
1628  ff_format_io_close(v->parent, &v->input);
1629  }
1630  v->cur_seq_no++;
1631 
1632  c->cur_seq_no = v->cur_seq_no;
1633 
1634  goto restart;
1635 }
1636 
1637 static void add_renditions_to_variant(HLSContext *c, struct variant *var,
1638  enum AVMediaType type, const char *group_id)
1639 {
1640  int i;
1641 
1642  for (i = 0; i < c->n_renditions; i++) {
1643  struct rendition *rend = c->renditions[i];
1644 
1645  if (rend->type == type && !strcmp(rend->group_id, group_id)) {
1646 
1647  if (rend->playlist)
1648  /* rendition is an external playlist
1649  * => add the playlist to the variant */
1650  dynarray_add(&var->playlists, &var->n_playlists, rend->playlist);
1651  else
1652  /* rendition is part of the variant main Media Playlist
1653  * => add the rendition to the main Media Playlist */
1654  dynarray_add(&var->playlists[0]->renditions,
1655  &var->playlists[0]->n_renditions,
1656  rend);
1657  }
1658  }
1659 }
1660 
1662  enum AVMediaType type)
1663 {
1664  int rend_idx = 0;
1665  int i;
1666 
1667  for (i = 0; i < pls->n_main_streams; i++) {
1668  AVStream *st = pls->main_streams[i];
1669 
1670  if (st->codecpar->codec_type != type)
1671  continue;
1672 
1673  for (; rend_idx < pls->n_renditions; rend_idx++) {
1674  struct rendition *rend = pls->renditions[rend_idx];
1675 
1676  if (rend->type != type)
1677  continue;
1678 
1679  if (rend->language[0])
1680  av_dict_set(&st->metadata, "language", rend->language, 0);
1681  if (rend->name[0])
1682  av_dict_set(&st->metadata, "comment", rend->name, 0);
1683 
1684  st->disposition |= rend->disposition;
1685  }
1686  if (rend_idx >=pls->n_renditions)
1687  break;
1688  }
1689 }
1690 
1691 /* if timestamp was in valid range: returns 1 and sets seq_no
1692  * if not: returns 0 and sets seq_no to closest segment */
1694  int64_t timestamp, int *seq_no)
1695 {
1696  int i;
1698  0 : c->first_timestamp;
1699 
1700  if (timestamp < pos) {
1701  *seq_no = pls->start_seq_no;
1702  return 0;
1703  }
1704 
1705  for (i = 0; i < pls->n_segments; i++) {
1706  int64_t diff = pos + pls->segments[i]->duration - timestamp;
1707  if (diff > 0) {
1708  *seq_no = pls->start_seq_no + i;
1709  return 1;
1710  }
1711  pos += pls->segments[i]->duration;
1712  }
1713 
1714  *seq_no = pls->start_seq_no + pls->n_segments - 1;
1715 
1716  return 0;
1717 }
1718 
1719 static int select_cur_seq_no(HLSContext *c, struct playlist *pls)
1720 {
1721  int seq_no;
1722 
1723  if (!pls->finished && !c->first_packet &&
1725  /* reload the playlist since it was suspended */
1726  parse_playlist(c, pls->url, pls, NULL);
1727 
1728  /* If playback is already in progress (we are just selecting a new
1729  * playlist) and this is a complete file, find the matching segment
1730  * by counting durations. */
1731  if (pls->finished && c->cur_timestamp != AV_NOPTS_VALUE) {
1732  find_timestamp_in_playlist(c, pls, c->cur_timestamp, &seq_no);
1733  return seq_no;
1734  }
1735 
1736  if (!pls->finished) {
1737  if (!c->first_packet && /* we are doing a segment selection during playback */
1738  c->cur_seq_no >= pls->start_seq_no &&
1739  c->cur_seq_no < pls->start_seq_no + pls->n_segments)
1740  /* While spec 3.4.3 says that we cannot assume anything about the
1741  * content at the same sequence number on different playlists,
1742  * in practice this seems to work and doing it otherwise would
1743  * require us to download a segment to inspect its timestamps. */
1744  return c->cur_seq_no;
1745 
1746  /* If this is a live stream, start live_start_index segments from the
1747  * start or end */
1748  if (c->live_start_index < 0)
1749  return pls->start_seq_no + FFMAX(pls->n_segments + c->live_start_index, 0);
1750  else
1751  return pls->start_seq_no + FFMIN(c->live_start_index, pls->n_segments - 1);
1752  }
1753 
1754  /* Otherwise just start on the first segment. */
1755  return pls->start_seq_no;
1756 }
1757 
1759 {
1760  HLSContext *c = s->priv_data;
1761  static const char * const opts[] = {
1762  "headers", "http_proxy", "user_agent", "cookies", "referer", "rw_timeout", "icy", NULL };
1763  const char * const * opt = opts;
1764  uint8_t *buf;
1765  int ret = 0;
1766 
1767  while (*opt) {
1768  if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN | AV_OPT_ALLOW_NULL, &buf) >= 0) {
1769  ret = av_dict_set(&c->avio_opts, *opt, buf,
1771  if (ret < 0)
1772  return ret;
1773  }
1774  opt++;
1775  }
1776 
1777  return ret;
1778 }
1779 
1780 static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url,
1781  int flags, AVDictionary **opts)
1782 {
1783  av_log(s, AV_LOG_ERROR,
1784  "A HLS playlist item '%s' referred to an external file '%s'. "
1785  "Opening this file was forbidden for security reasons\n",
1786  s->url, url);
1787  return AVERROR(EPERM);
1788 }
1789 
1790 static void add_stream_to_programs(AVFormatContext *s, struct playlist *pls, AVStream *stream)
1791 {
1792  HLSContext *c = s->priv_data;
1793  int i, j;
1794  int bandwidth = -1;
1795 
1796  for (i = 0; i < c->n_variants; i++) {
1797  struct variant *v = c->variants[i];
1798 
1799  for (j = 0; j < v->n_playlists; j++) {
1800  if (v->playlists[j] != pls)
1801  continue;
1802 
1803  av_program_add_stream_index(s, i, stream->index);
1804 
1805  if (bandwidth < 0)
1806  bandwidth = v->bandwidth;
1807  else if (bandwidth != v->bandwidth)
1808  bandwidth = -1; /* stream in multiple variants with different bandwidths */
1809  }
1810  }
1811 
1812  if (bandwidth >= 0)
1813  av_dict_set_int(&stream->metadata, "variant_bitrate", bandwidth, 0);
1814 }
1815 
1817 {
1818  int err;
1819 
1820  err = avcodec_parameters_copy(st->codecpar, ist->codecpar);
1821  if (err < 0)
1822  return err;
1823 
1824  if (pls->is_id3_timestamped) /* custom timestamps via id3 */
1825  avpriv_set_pts_info(st, 33, 1, MPEG_TIME_BASE);
1826  else
1828 
1829  st->internal->need_context_update = 1;
1830 
1831  return 0;
1832 }
1833 
1834 /* add new subdemuxer streams to our context, if any */
1836 {
1837  int err;
1838 
1839  while (pls->n_main_streams < pls->ctx->nb_streams) {
1840  int ist_idx = pls->n_main_streams;
1841  AVStream *st = avformat_new_stream(s, NULL);
1842  AVStream *ist = pls->ctx->streams[ist_idx];
1843 
1844  if (!st)
1845  return AVERROR(ENOMEM);
1846 
1847  st->id = pls->index;
1848  dynarray_add(&pls->main_streams, &pls->n_main_streams, st);
1849 
1850  add_stream_to_programs(s, pls, st);
1851 
1852  err = set_stream_info_from_input_stream(st, pls, ist);
1853  if (err < 0)
1854  return err;
1855  }
1856 
1857  return 0;
1858 }
1859 
1861 {
1862  HLSContext *c = s->priv_data;
1863  int flag_needed = 0;
1864  int i;
1865 
1866  for (i = 0; i < c->n_playlists; i++) {
1867  struct playlist *pls = c->playlists[i];
1868 
1869  if (pls->has_noheader_flag) {
1870  flag_needed = 1;
1871  break;
1872  }
1873  }
1874 
1875  if (flag_needed)
1877  else
1879 }
1880 
1882 {
1883  HLSContext *c = s->priv_data;
1884 
1885  free_playlist_list(c);
1886  free_variant_list(c);
1888 
1889  av_dict_free(&c->avio_opts);
1891 
1892  return 0;
1893 }
1894 
1896 {
1897  HLSContext *c = s->priv_data;
1898  int ret = 0, i;
1899  int highest_cur_seq_no = 0;
1900 
1901  c->ctx = s;
1903 
1904  c->first_packet = 1;
1907 
1908  if ((ret = save_avio_options(s)) < 0)
1909  goto fail;
1910 
1911  /* XXX: Some HLS servers don't like being sent the range header,
1912  in this case, need to setting http_seekable = 0 to disable
1913  the range header */
1914  av_dict_set_int(&c->avio_opts, "seekable", c->http_seekable, 0);
1915 
1916  if ((ret = parse_playlist(c, s->url, NULL, s->pb)) < 0)
1917  goto fail;
1918 
1919  if (c->n_variants == 0) {
1920  av_log(s, AV_LOG_WARNING, "Empty playlist\n");
1921  ret = AVERROR_EOF;
1922  goto fail;
1923  }
1924  /* If the playlist only contained playlists (Master Playlist),
1925  * parse each individual playlist. */
1926  if (c->n_playlists > 1 || c->playlists[0]->n_segments == 0) {
1927  for (i = 0; i < c->n_playlists; i++) {
1928  struct playlist *pls = c->playlists[i];
1929  pls->m3u8_hold_counters = 0;
1930  if ((ret = parse_playlist(c, pls->url, pls, NULL)) < 0) {
1931  av_log(s, AV_LOG_WARNING, "parse_playlist error %s [%s]\n", av_err2str(ret), pls->url);
1932  pls->broken = 1;
1933  if (c->n_playlists > 1)
1934  continue;
1935  goto fail;
1936  }
1937  }
1938  }
1939 
1940  for (i = 0; i < c->n_variants; i++) {
1941  if (c->variants[i]->playlists[0]->n_segments == 0) {
1942  av_log(s, AV_LOG_WARNING, "Empty segment [%s]\n", c->variants[i]->playlists[0]->url);
1943  c->variants[i]->playlists[0]->broken = 1;
1944  }
1945  }
1946 
1947  /* If this isn't a live stream, calculate the total duration of the
1948  * stream. */
1949  if (c->variants[0]->playlists[0]->finished) {
1950  int64_t duration = 0;
1951  for (i = 0; i < c->variants[0]->playlists[0]->n_segments; i++)
1952  duration += c->variants[0]->playlists[0]->segments[i]->duration;
1953  s->duration = duration;
1954  }
1955 
1956  /* Associate renditions with variants */
1957  for (i = 0; i < c->n_variants; i++) {
1958  struct variant *var = c->variants[i];
1959 
1960  if (var->audio_group[0])
1962  if (var->video_group[0])
1964  if (var->subtitles_group[0])
1966  }
1967 
1968  /* Create a program for each variant */
1969  for (i = 0; i < c->n_variants; i++) {
1970  struct variant *v = c->variants[i];
1971  AVProgram *program;
1972 
1973  program = av_new_program(s, i);
1974  if (!program)
1975  goto fail;
1976  av_dict_set_int(&program->metadata, "variant_bitrate", v->bandwidth, 0);
1977  }
1978 
1979  /* Select the starting segments */
1980  for (i = 0; i < c->n_playlists; i++) {
1981  struct playlist *pls = c->playlists[i];
1982 
1983  if (pls->n_segments == 0)
1984  continue;
1985 
1986  pls->cur_seq_no = select_cur_seq_no(c, pls);
1987  highest_cur_seq_no = FFMAX(highest_cur_seq_no, pls->cur_seq_no);
1988  }
1989 
1990  /* Open the demuxer for each playlist */
1991  for (i = 0; i < c->n_playlists; i++) {
1992  struct playlist *pls = c->playlists[i];
1993  char *url;
1994  ff_const59 AVInputFormat *in_fmt = NULL;
1995 
1996  if (!(pls->ctx = avformat_alloc_context())) {
1997  ret = AVERROR(ENOMEM);
1998  goto fail;
1999  }
2000 
2001  if (pls->n_segments == 0)
2002  continue;
2003 
2004  pls->index = i;
2005  pls->needed = 1;
2006  pls->parent = s;
2007 
2008  /*
2009  * If this is a live stream and this playlist looks like it is one segment
2010  * behind, try to sync it up so that every substream starts at the same
2011  * time position (so e.g. avformat_find_stream_info() will see packets from
2012  * all active streams within the first few seconds). This is not very generic,
2013  * though, as the sequence numbers are technically independent.
2014  */
2015  if (!pls->finished && pls->cur_seq_no == highest_cur_seq_no - 1 &&
2016  highest_cur_seq_no < pls->start_seq_no + pls->n_segments) {
2017  pls->cur_seq_no = highest_cur_seq_no;
2018  }
2019 
2021  if (!pls->read_buffer){
2022  ret = AVERROR(ENOMEM);
2023  avformat_free_context(pls->ctx);
2024  pls->ctx = NULL;
2025  goto fail;
2026  }
2027  ffio_init_context(&pls->pb, pls->read_buffer, INITIAL_BUFFER_SIZE, 0, pls,
2028  read_data, NULL, NULL);
2029  pls->ctx->probesize = s->probesize > 0 ? s->probesize : 1024 * 4;
2031  url = av_strdup(pls->segments[0]->url);
2032  ret = av_probe_input_buffer(&pls->pb, &in_fmt, url, NULL, 0, 0);
2033 
2034  for (int n = 0; n < pls->n_segments; n++)
2035  if (ret >= 0)
2036  ret = test_segment(s, in_fmt, pls, pls->segments[n]);
2037 
2038  av_free(url);
2039  if (ret < 0) {
2040  /* Free the ctx - it isn't initialized properly at this point,
2041  * so avformat_close_input shouldn't be called. If
2042  * avformat_open_input fails below, it frees and zeros the
2043  * context, so it doesn't need any special treatment like this. */
2044  av_log(s, AV_LOG_ERROR, "Error when loading first segment '%s'\n", pls->segments[0]->url);
2045  avformat_free_context(pls->ctx);
2046  pls->ctx = NULL;
2047  goto fail;
2048  }
2049  pls->ctx->pb = &pls->pb;
2050  pls->ctx->io_open = nested_io_open;
2051  pls->ctx->flags |= s->flags & ~AVFMT_FLAG_CUSTOM_IO;
2052 
2053  if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
2054  goto fail;
2055 
2056  ret = avformat_open_input(&pls->ctx, pls->segments[0]->url, in_fmt, NULL);
2057  if (ret < 0)
2058  goto fail;
2059 
2060  if (pls->id3_deferred_extra && pls->ctx->nb_streams == 1) {
2065  }
2066 
2067  if (pls->is_id3_timestamped == -1)
2068  av_log(s, AV_LOG_WARNING, "No expected HTTP requests have been made\n");
2069 
2070  /*
2071  * For ID3 timestamped raw audio streams we need to detect the packet
2072  * durations to calculate timestamps in fill_timing_for_id3_timestamped_stream(),
2073  * but for other streams we can rely on our user calling avformat_find_stream_info()
2074  * on us if they want to.
2075  */
2076  if (pls->is_id3_timestamped || (pls->n_renditions > 0 && pls->renditions[0]->type == AVMEDIA_TYPE_AUDIO)) {
2077  ret = avformat_find_stream_info(pls->ctx, NULL);
2078  if (ret < 0)
2079  goto fail;
2080  }
2081 
2082  pls->has_noheader_flag = !!(pls->ctx->ctx_flags & AVFMTCTX_NOHEADER);
2083 
2084  /* Create new AVStreams for each stream in this playlist */
2085  ret = update_streams_from_subdemuxer(s, pls);
2086  if (ret < 0)
2087  goto fail;
2088 
2089  /*
2090  * Copy any metadata from playlist to main streams, but do not set
2091  * event flags.
2092  */
2093  if (pls->n_main_streams)
2094  av_dict_copy(&pls->main_streams[0]->metadata, pls->ctx->metadata, 0);
2095 
2099  }
2100 
2102 
2103  return 0;
2104 fail:
2105  hls_close(s);
2106  return ret;
2107 }
2108 
2109 static int recheck_discard_flags(AVFormatContext *s, int first)
2110 {
2111  HLSContext *c = s->priv_data;
2112  int i, changed = 0;
2113  int cur_needed;
2114 
2115  /* Check if any new streams are needed */
2116  for (i = 0; i < c->n_playlists; i++) {
2117  struct playlist *pls = c->playlists[i];
2118 
2119  cur_needed = playlist_needed(c->playlists[i]);
2120 
2121  if (pls->broken) {
2122  continue;
2123  }
2124  if (cur_needed && !pls->needed) {
2125  pls->needed = 1;
2126  changed = 1;
2127  pls->cur_seq_no = select_cur_seq_no(c, pls);
2128  pls->pb.eof_reached = 0;
2129  if (c->cur_timestamp != AV_NOPTS_VALUE) {
2130  /* catch up */
2131  pls->seek_timestamp = c->cur_timestamp;
2132  pls->seek_flags = AVSEEK_FLAG_ANY;
2133  pls->seek_stream_index = -1;
2134  }
2135  av_log(s, AV_LOG_INFO, "Now receiving playlist %d, segment %d\n", i, pls->cur_seq_no);
2136  } else if (first && !cur_needed && pls->needed) {
2137  ff_format_io_close(pls->parent, &pls->input);
2138  pls->input_read_done = 0;
2139  ff_format_io_close(pls->parent, &pls->input_next);
2140  pls->input_next_requested = 0;
2141  pls->needed = 0;
2142  changed = 1;
2143  av_log(s, AV_LOG_INFO, "No longer receiving playlist %d\n", i);
2144  }
2145  }
2146  return changed;
2147 }
2148 
2150 {
2151  if (pls->id3_offset >= 0) {
2152  pls->pkt.dts = pls->id3_mpegts_timestamp +
2153  av_rescale_q(pls->id3_offset,
2154  pls->ctx->streams[pls->pkt.stream_index]->time_base,
2156  if (pls->pkt.duration)
2157  pls->id3_offset += pls->pkt.duration;
2158  else
2159  pls->id3_offset = -1;
2160  } else {
2161  /* there have been packets with unknown duration
2162  * since the last id3 tag, should not normally happen */
2163  pls->pkt.dts = AV_NOPTS_VALUE;
2164  }
2165 
2166  if (pls->pkt.duration)
2167  pls->pkt.duration = av_rescale_q(pls->pkt.duration,
2168  pls->ctx->streams[pls->pkt.stream_index]->time_base,
2170 
2171  pls->pkt.pts = AV_NOPTS_VALUE;
2172 }
2173 
2174 static AVRational get_timebase(struct playlist *pls)
2175 {
2176  if (pls->is_id3_timestamped)
2177  return MPEG_TIME_BASE_Q;
2178 
2179  return pls->ctx->streams[pls->pkt.stream_index]->time_base;
2180 }
2181 
2182 static int compare_ts_with_wrapdetect(int64_t ts_a, struct playlist *pls_a,
2183  int64_t ts_b, struct playlist *pls_b)
2184 {
2185  int64_t scaled_ts_a = av_rescale_q(ts_a, get_timebase(pls_a), MPEG_TIME_BASE_Q);
2186  int64_t scaled_ts_b = av_rescale_q(ts_b, get_timebase(pls_b), MPEG_TIME_BASE_Q);
2187 
2188  return av_compare_mod(scaled_ts_a, scaled_ts_b, 1LL << 33);
2189 }
2190 
2192 {
2193  HLSContext *c = s->priv_data;
2194  int ret, i, minplaylist = -1;
2195 
2197  c->first_packet = 0;
2198 
2199  for (i = 0; i < c->n_playlists; i++) {
2200  struct playlist *pls = c->playlists[i];
2201  /* Make sure we've got one buffered packet from each open playlist
2202  * stream */
2203  if (pls->needed && !pls->pkt.data) {
2204  while (1) {
2205  int64_t ts_diff;
2206  AVRational tb;
2207  ret = av_read_frame(pls->ctx, &pls->pkt);
2208  if (ret < 0) {
2209  if (!avio_feof(&pls->pb) && ret != AVERROR_EOF)
2210  return ret;
2211  reset_packet(&pls->pkt);
2212  break;
2213  } else {
2214  /* stream_index check prevents matching picture attachments etc. */
2215  if (pls->is_id3_timestamped && pls->pkt.stream_index == 0) {
2216  /* audio elementary streams are id3 timestamped */
2218  }
2219 
2220  if (c->first_timestamp == AV_NOPTS_VALUE &&
2221  pls->pkt.dts != AV_NOPTS_VALUE)
2222  c->first_timestamp = av_rescale_q(pls->pkt.dts,
2224  }
2225 
2226  if (pls->seek_timestamp == AV_NOPTS_VALUE)
2227  break;
2228 
2229  if (pls->seek_stream_index < 0 ||
2230  pls->seek_stream_index == pls->pkt.stream_index) {
2231 
2232  if (pls->pkt.dts == AV_NOPTS_VALUE) {
2234  break;
2235  }
2236 
2237  tb = get_timebase(pls);
2238  ts_diff = av_rescale_rnd(pls->pkt.dts, AV_TIME_BASE,
2239  tb.den, AV_ROUND_DOWN) -
2240  pls->seek_timestamp;
2241  if (ts_diff >= 0 && (pls->seek_flags & AVSEEK_FLAG_ANY ||
2242  pls->pkt.flags & AV_PKT_FLAG_KEY)) {
2244  break;
2245  }
2246  }
2247  av_packet_unref(&pls->pkt);
2248  }
2249  }
2250  /* Check if this stream has the packet with the lowest dts */
2251  if (pls->pkt.data) {
2252  struct playlist *minpls = minplaylist < 0 ?
2253  NULL : c->playlists[minplaylist];
2254  if (minplaylist < 0) {
2255  minplaylist = i;
2256  } else {
2257  int64_t dts = pls->pkt.dts;
2258  int64_t mindts = minpls->pkt.dts;
2259 
2260  if (dts == AV_NOPTS_VALUE ||
2261  (mindts != AV_NOPTS_VALUE && compare_ts_with_wrapdetect(dts, pls, mindts, minpls) < 0))
2262  minplaylist = i;
2263  }
2264  }
2265  }
2266 
2267  /* If we got a packet, return it */
2268  if (minplaylist >= 0) {
2269  struct playlist *pls = c->playlists[minplaylist];
2270  AVStream *ist;
2271  AVStream *st;
2272 
2273  ret = update_streams_from_subdemuxer(s, pls);
2274  if (ret < 0) {
2275  av_packet_unref(&pls->pkt);
2276  return ret;
2277  }
2278 
2279  // If sub-demuxer reports updated metadata, copy it to the first stream
2280  // and set its AVSTREAM_EVENT_FLAG_METADATA_UPDATED flag.
2282  if (pls->n_main_streams) {
2283  st = pls->main_streams[0];
2284  av_dict_copy(&st->metadata, pls->ctx->metadata, 0);
2286  }
2288  }
2289 
2290  /* check if noheader flag has been cleared by the subdemuxer */
2291  if (pls->has_noheader_flag && !(pls->ctx->ctx_flags & AVFMTCTX_NOHEADER)) {
2292  pls->has_noheader_flag = 0;
2294  }
2295 
2296  if (pls->pkt.stream_index >= pls->n_main_streams) {
2297  av_log(s, AV_LOG_ERROR, "stream index inconsistency: index %d, %d main streams, %d subdemuxer streams\n",
2298  pls->pkt.stream_index, pls->n_main_streams, pls->ctx->nb_streams);
2299  av_packet_unref(&pls->pkt);
2300  return AVERROR_BUG;
2301  }
2302 
2303  ist = pls->ctx->streams[pls->pkt.stream_index];
2304  st = pls->main_streams[pls->pkt.stream_index];
2305 
2306  av_packet_move_ref(pkt, &pls->pkt);
2307  pkt->stream_index = st->index;
2308 
2309  if (pkt->dts != AV_NOPTS_VALUE)
2310  c->cur_timestamp = av_rescale_q(pkt->dts,
2311  ist->time_base,
2312  AV_TIME_BASE_Q);
2313 
2314  /* There may be more situations where this would be useful, but this at least
2315  * handles newly probed codecs properly (i.e. request_probe by mpegts). */
2316  if (ist->codecpar->codec_id != st->codecpar->codec_id) {
2317  ret = set_stream_info_from_input_stream(st, pls, ist);
2318  if (ret < 0) {
2319  return ret;
2320  }
2321  }
2322 
2323  return 0;
2324  }
2325  return AVERROR_EOF;
2326 }
2327 
2328 static int hls_read_seek(AVFormatContext *s, int stream_index,
2329  int64_t timestamp, int flags)
2330 {
2331  HLSContext *c = s->priv_data;
2332  struct playlist *seek_pls = NULL;
2333  int i, seq_no;
2334  int j;
2335  int stream_subdemuxer_index;
2336  int64_t first_timestamp, seek_timestamp, duration;
2337 
2338  if ((flags & AVSEEK_FLAG_BYTE) || (c->ctx->ctx_flags & AVFMTCTX_UNSEEKABLE))
2339  return AVERROR(ENOSYS);
2340 
2341  first_timestamp = c->first_timestamp == AV_NOPTS_VALUE ?
2342  0 : c->first_timestamp;
2343 
2344  seek_timestamp = av_rescale_rnd(timestamp, AV_TIME_BASE,
2345  s->streams[stream_index]->time_base.den,
2346  flags & AVSEEK_FLAG_BACKWARD ?
2348 
2349  duration = s->duration == AV_NOPTS_VALUE ?
2350  0 : s->duration;
2351 
2352  if (0 < duration && duration < seek_timestamp - first_timestamp)
2353  return AVERROR(EIO);
2354 
2355  /* find the playlist with the specified stream */
2356  for (i = 0; i < c->n_playlists; i++) {
2357  struct playlist *pls = c->playlists[i];
2358  for (j = 0; j < pls->n_main_streams; j++) {
2359  if (pls->main_streams[j] == s->streams[stream_index]) {
2360  seek_pls = pls;
2361  stream_subdemuxer_index = j;
2362  break;
2363  }
2364  }
2365  }
2366  /* check if the timestamp is valid for the playlist with the
2367  * specified stream index */
2368  if (!seek_pls || !find_timestamp_in_playlist(c, seek_pls, seek_timestamp, &seq_no))
2369  return AVERROR(EIO);
2370 
2371  /* set segment now so we do not need to search again below */
2372  seek_pls->cur_seq_no = seq_no;
2373  seek_pls->seek_stream_index = stream_subdemuxer_index;
2374 
2375  for (i = 0; i < c->n_playlists; i++) {
2376  /* Reset reading */
2377  struct playlist *pls = c->playlists[i];
2378  ff_format_io_close(pls->parent, &pls->input);
2379  pls->input_read_done = 0;
2380  ff_format_io_close(pls->parent, &pls->input_next);
2381  pls->input_next_requested = 0;
2382  av_packet_unref(&pls->pkt);
2383  pls->pb.eof_reached = 0;
2384  /* Clear any buffered data */
2385  pls->pb.buf_end = pls->pb.buf_ptr = pls->pb.buffer;
2386  /* Reset the pos, to let the mpegts demuxer know we've seeked. */
2387  pls->pb.pos = 0;
2388  /* Flush the packet queue of the subdemuxer. */
2389  ff_read_frame_flush(pls->ctx);
2390 
2392  pls->seek_flags = flags;
2393 
2394  if (pls != seek_pls) {
2395  /* set closest segment seq_no for playlists not handled above */
2396  find_timestamp_in_playlist(c, pls, seek_timestamp, &pls->cur_seq_no);
2397  /* seek the playlist to the given position without taking
2398  * keyframes into account since this playlist does not have the
2399  * specified stream where we should look for the keyframes */
2400  pls->seek_stream_index = -1;
2401  pls->seek_flags |= AVSEEK_FLAG_ANY;
2402  }
2403  }
2404 
2406 
2407  return 0;
2408 }
2409 
2410 static int hls_probe(const AVProbeData *p)
2411 {
2412  /* Require #EXTM3U at the start, and either one of the ones below
2413  * somewhere for a proper match. */
2414  if (strncmp(p->buf, "#EXTM3U", 7))
2415  return 0;
2416 
2417  if (strstr(p->buf, "#EXT-X-STREAM-INF:") ||
2418  strstr(p->buf, "#EXT-X-TARGETDURATION:") ||
2419  strstr(p->buf, "#EXT-X-MEDIA-SEQUENCE:"))
2420  return AVPROBE_SCORE_MAX;
2421  return 0;
2422 }
2423 
2424 #define OFFSET(x) offsetof(HLSContext, x)
2425 #define FLAGS AV_OPT_FLAG_DECODING_PARAM
2426 static const AVOption hls_options[] = {
2427  {"live_start_index", "segment index to start live streams at (negative values are from the end)",
2428  OFFSET(live_start_index), AV_OPT_TYPE_INT, {.i64 = -3}, INT_MIN, INT_MAX, FLAGS},
2429  {"allowed_extensions", "List of file extensions that hls is allowed to access",
2430  OFFSET(allowed_extensions), AV_OPT_TYPE_STRING,
2431  {.str = "3gp,aac,avi,flac,mkv,m3u8,m4a,m4s,m4v,mpg,mov,mp2,mp3,mp4,mpeg,mpegts,ogg,ogv,oga,ts,vob,wav"},
2432  INT_MIN, INT_MAX, FLAGS},
2433  {"extension_picky", "Be picky with all extensions matching",
2434  OFFSET(extension_picky), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS},
2435  {"max_reload", "Maximum number of times a insufficient list is attempted to be reloaded",
2436  OFFSET(max_reload), AV_OPT_TYPE_INT, {.i64 = 100}, 0, INT_MAX, FLAGS},
2437  {"m3u8_hold_counters", "The maximum number of times to load m3u8 when it refreshes without new segments",
2438  OFFSET(m3u8_hold_counters), AV_OPT_TYPE_INT, {.i64 = 1000}, 0, INT_MAX, FLAGS},
2439  {"http_persistent", "Use persistent HTTP connections",
2440  OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS },
2441  {"http_multiple", "Use multiple HTTP connections for fetching segments",
2442  OFFSET(http_multiple), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, FLAGS},
2443  {"http_seekable", "Use HTTP partial requests, 0 = disable, 1 = enable, -1 = auto",
2444  OFFSET(http_seekable), AV_OPT_TYPE_BOOL, { .i64 = -1}, -1, 1, FLAGS},
2445  {NULL}
2446 };
2447 
2448 static const AVClass hls_class = {
2449  .class_name = "hls demuxer",
2450  .item_name = av_default_item_name,
2451  .option = hls_options,
2452  .version = LIBAVUTIL_VERSION_INT,
2453 };
2454 
2456  .name = "hls",
2457  .long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
2458  .priv_class = &hls_class,
2459  .priv_data_size = sizeof(HLSContext),
2461  .read_probe = hls_probe,
2464  .read_close = hls_close,
2466 };
#define FF_COMPLIANCE_EXPERIMENTAL
Allow nonstandardized experimental things.
Definition: avcodec.h:1598
#define AVSEEK_FLAG_BACKWARD
Definition: avformat.h:2512
int64_t probesize
Maximum size of the data read from input for determining the input container format.
Definition: avformat.h:1517
int(* io_open)(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **options)
A callback for opening new IO streams.
Definition: avformat.h:1933
uint8_t key[16]
Definition: hls.c:134
#define NULL
Definition: coverity.c:32
int ff_id3v2_parse_priv(AVFormatContext *s, ID3v2ExtraMeta *extra_meta)
Add metadata for all PRIV tags in the ID3v2 header.
Definition: id3v2.c:1271
static int update_init_section(struct playlist *pls, struct segment *seg)
Definition: hls.c:1367
int needed
Definition: hls.c:118
int m3u8_hold_counters
Definition: hls.c:122
struct segment * init_section
Definition: hls.c:77
Bytestream IO Context.
Definition: avio.h:161
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:334
int bandwidth
Definition: hls.c:181
static int read_from_url(struct playlist *pls, struct segment *seg, uint8_t *buf, int buf_size)
Definition: hls.c:1066
#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:468
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:1816
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:451
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
unsigned int id3_buf_size
Definition: hls.c:142
ID3v2ExtraMeta * id3_deferred_extra
Definition: hls.c:146
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
unsigned char * buf_ptr
Current position in the buffer.
Definition: avio.h:228
unsigned char * buf_end
End of the data, may be less than buffer+buffer_size if the read function returned less data than req...
Definition: avio.h:229
#define AV_RB64
Definition: intreadwrite.h:164
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4948
int ff_copy_whiteblacklists(AVFormatContext *dst, const AVFormatContext *src)
Copies the whilelists from one context to the other.
Definition: utils.c:159
#define AVSEEK_FLAG_ANY
seek to any frame, even non-keyframes
Definition: avformat.h:2514
int event_flags
Flags for the user to detect events happening on the stream.
Definition: avformat.h:989
char forced[4]
Definition: hls.c:471
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:475
static int64_t default_reload_interval(struct playlist *pls)
Definition: hls.c:1424
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:467
unsigned char * buffer
Start of the buffer.
Definition: avio.h:226
int av_strncasecmp(const char *a, const char *b, size_t n)
Locale-independent case-insensitive compare.
Definition: avstring.c:223
int has_noheader_flag
Definition: hls.c:105
int event_flags
Flags for the user to detect events happening on the file.
Definition: avformat.h:1666
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:217
#define AV_DISPOSITION_HEARING_IMPAIRED
stream for hearing impaired audiences
Definition: avformat.h:834
int avformat_open_input(AVFormatContext **ps, const char *url, ff_const59 AVInputFormat *fmt, AVDictionary **options)
Open an input stream and read the header.
Definition: utils.c:536
static void fill_buf(uint8_t *data, int w, int h, int linesize, uint8_t v)
char * key
Definition: hls.c:73
int av_usleep(unsigned usec)
Sleep for a period of time.
Definition: time.c:84
discard all
Definition: avcodec.h:236
static AVPacket pkt
static void handle_rendition_args(struct rendition_info *info, const char *key, int key_len, char **dest, int *dest_len)
Definition: hls.c:559
#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:339
int ctx_flags
Flags signalling stream properties.
Definition: avformat.h:1400
Round toward +infinity.
Definition: mathematics.h:83
static void reset_packet(AVPacket *pkt)
Definition: hls.c:302
int http_seekable
Definition: hls.c:215
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:1109
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:383
void ff_read_frame_flush(AVFormatContext *s)
Flush the frame reader.
Definition: utils.c:1931
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
unsigned int init_sec_buf_read_offset
Definition: hls.c:131
Public dictionary API.
char type[16]
Definition: hls.c:464
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:470
uint8_t
int http_multiple
Definition: hls.c:214
int n_variants
Definition: hls.c:195
#define FLAGS
Definition: hls.c:2425
#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:466
int64_t cur_seg_offset
Definition: hls.c:123
char audio[MAX_FIELD_LEN]
Definition: hls.c:332
static void free_rendition_list(HLSContext *c)
Definition: hls.c:289
#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:1058
int id
Format-specific stream ID.
Definition: avformat.h:883
uint8_t * read_buffer
Definition: hls.c:96
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5695
char url[MAX_URL_SIZE]
Definition: hls.c:94
static void intercept_id3(struct playlist *pls, uint8_t *buf, int buf_size, int *len)
Definition: hls.c:1180
static struct playlist * new_playlist(HLSContext *c, const char *url, const char *base)
Definition: hls.c:308
AVInputFormat ff_hls_demuxer
Definition: hls.c:2455
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4526
int finished
Definition: hls.c:112
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1419
static void handle_id3(AVIOContext *pb, struct playlist *pls)
Definition: hls.c:1138
int n_playlists
Definition: hls.c:197
AVFormatContext * avformat_alloc_context(void)
Allocate an AVFormatContext.
Definition: options.c:144
#define AVERROR_PROTOCOL_NOT_FOUND
Protocol not found.
Definition: error.h:63
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:40
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1482
uint8_t * data
Definition: packet.h:355
AVProgram * av_new_program(AVFormatContext *s, int id)
Definition: utils.c:4625
void av_packet_move_ref(AVPacket *dst, AVPacket *src)
Move every field in src to dst and reset src.
Definition: avpacket.c:663
static int read_data(void *opaque, uint8_t *buf, int buf_size)
Definition: hls.c:1477
#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:1661
unsigned int * stream_index
Definition: avformat.h:1272
#define av_log(a,...)
static void free_playlist_list(HLSContext *c)
Definition: hls.c:248
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:219
static AVRational get_timebase(struct playlist *pls)
Definition: hls.c:2174
static int test_segment(AVFormatContext *s, const AVInputFormat *in_fmt, struct playlist *pls, struct segment *seg)
Definition: hls.c:716
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:216
#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:2182
#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
Round toward -infinity.
Definition: mathematics.h:82
int64_t cur_timestamp
Definition: hls.c:207
int n_renditions
Definition: hls.c:156
static const AVClass hls_class
Definition: hls.c:2448
AVIOInterruptCB * interrupt_callback
Definition: hls.c:208
char bandwidth[20]
Definition: hls.c:330
#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:387
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:188
ff_const59 struct AVInputFormat * iformat
The input container format.
Definition: avformat.h:1363
char * url
input or output URL.
Definition: avformat.h:1447
const char * r
Definition: vf_curves.c:114
unsigned int pos
Definition: spdifenc.c:412
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
unsigned int nb_programs
Definition: avformat.h:1530
char byterange[32]
Definition: hls.c:404
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:229
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1124
Definition: graph2dot.c:48
simple assert() macros that are a bit more flexible than ISO C assert().
static int update_streams_from_subdemuxer(AVFormatContext *s, struct playlist *pls)
Definition: hls.c:1835
int first_packet
Definition: hls.c:205
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:237
int av_match_name(const char *name, const char *names)
Match instances of a name in a comma-separated list of names.
Definition: avstring.c:350
static int find_timestamp_in_playlist(HLSContext *c, struct playlist *pls, int64_t timestamp, int *seq_no)
Definition: hls.c:1693
uint8_t * data
Definition: id3v2.h:74
int64_t id3_offset
Definition: hls.c:140
int is_id3_timestamped
Definition: hls.c:138
New fields can be added to the end with minor version bumps.
Definition: avformat.h:1268
#define FFMAX(a, b)
Definition: common.h:94
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:83
#define fail()
Definition: checkasm.h:123
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:361
void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size)
Allocate a buffer, reusing the given one if large enough.
Definition: mem.c:502
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:443
int live_start_index
Definition: hls.c:204
Definition: hls.c:68
#define AV_DISPOSITION_FORCED
Track should be used during playback by default.
Definition: avformat.h:833
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1407
AVDictionary * opts
Definition: movenc.c:50
char group_id[MAX_FIELD_LEN]
Definition: hls.c:174
static struct segment * current_segment(struct playlist *pls)
Definition: hls.c:1053
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:1780
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:254
void av_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
#define FFMIN(a, b)
Definition: common.h:96
void(* ff_parse_key_val_cb)(void *context, const char *key, int key_len, char **dest, int *dest_len)
Callback function type for ff_parse_key_value.
Definition: internal.h:355
#define AV_OPT_SEARCH_CHILDREN
Search in possible children of the given object first.
Definition: opt.h:558
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that&#39;s been allocated with av_malloc() or another memory allocation functio...
Definition: dict.h:76
char * allowed_extensions
Definition: hls.c:210
static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url, AVDictionary **opts, AVDictionary *opts2, int *is_http_out)
Definition: hls.c:631
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:1637
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:2191
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:381
#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:407
void * av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)
Reallocate the given buffer if it is not large enough, otherwise do nothing.
Definition: mem.c:478
int ff_make_absolute_url(char *buf, int size, const char *base, const char *rel)
Convert a relative url into an absolute url, given a base url.
Definition: url.c:319
AVDictionary * metadata
Definition: avformat.h:940
static struct variant * new_variant(HLSContext *c, struct variant_info *info, const char *url, const char *base)
Definition: hls.c:337
#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:2149
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:469
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:545
#define AV_DISPOSITION_VISUAL_IMPAIRED
stream for visual impaired audiences
Definition: avformat.h:835
int64_t size
Definition: hls.c:71
enum KeyType key_type
Definition: hls.c:74
Stream structure.
Definition: avformat.h:876
int id3_changed
Definition: hls.c:145
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
int avformat_queue_attached_pictures(AVFormatContext *s)
Definition: utils.c:478
AVFormatContext * parent
Definition: hls.c:101
AVFormatContext * ctx
Definition: hls.c:194
int extension_picky
Definition: hls.c:211
static void parse_id3(AVFormatContext *s, AVIOContext *pb, AVDictionary **metadata, int64_t *dts, ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta **extra_meta)
Definition: hls.c:1083
#define AV_DISPOSITION_DEFAULT
Definition: avformat.h:821
int64_t first_timestamp
Definition: hls.c:206
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:253
char subtitles[MAX_FIELD_LEN]
Definition: hls.c:334
AVStreamInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1231
struct ID3v2ExtraMeta * next
Definition: id3v2.h:86
int ff_check_interrupt(AVIOInterruptCB *cb)
Check if the user has requested to interrupt a blocking function associated with cb.
Definition: avio.c:666
enum PlaylistType type
Definition: hls.c:113
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
AVIOContext * pb
I/O context.
Definition: avformat.h:1393
static int parse_playlist(HLSContext *c, const char *url, struct playlist *pls, AVIOContext *in)
Definition: hls.c:756
int n_init_sections
Definition: hls.c:161
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:605
long long int64_t
Definition: coverity.c:34
uint8_t * data
The data buffer.
Definition: buffer.h:89
#define AVFMT_NOGENSEARCH
Format does not allow to fall back on generic search.
Definition: avformat.h:469
static const AVOption hls_options[]
Definition: hls.c:2426
static int hls_read_header(AVFormatContext *s)
Definition: hls.c:1895
int ff_match_url_ext(const char *url, const char *extensions)
Return a positive value if the given url has one of the given extensions, negative AVERROR on error...
Definition: format.c:51
Definition: url.h:38
ID3v2ExtraMetaAPIC apic
Definition: id3v2.h:88
int max_reload
Definition: hls.c:212
int ff_id3v2_parse_apic(AVFormatContext *s, ID3v2ExtraMeta *extra_meta)
Create a stream for each APIC (attached picture) extracted from the ID3v2 header. ...
Definition: id3v2.c:1140
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:70
struct playlist ** playlists
Definition: hls.c:198
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:50
static int open_input(HLSContext *c, struct playlist *pls, struct segment *seg, AVIOContext **in)
Definition: hls.c:1280
int64_t last_load_time
Definition: hls.c:124
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) #define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac) { } void ff_audio_convert_free(AudioConvert **ac) { if(! *ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);} AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map) { AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method !=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt) > 2) { ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc) { av_free(ac);return NULL;} return ac;} in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar) { ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar ? ac->channels :1;} else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);return ac;} int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in) { int use_generic=1;int len=in->nb_samples;int p;if(ac->dc) { av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (dithered)\", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
Describe the class of an AVClass context structure.
Definition: log.h:67
int ff_id3v2_parse_priv_dict(AVDictionary **metadata, ID3v2ExtraMeta *extra_meta)
Parse PRIV tags into a dictionary.
Definition: id3v2.c:1231
static void update_noheader_flag(AVFormatContext *s)
Definition: hls.c:1860
#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:1758
#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:465
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:1790
#define MPEG_TIME_BASE
Definition: hls.c:47
#define snprintf
Definition: snprintf.h:34
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:4455
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
int ff_hex_to_data(uint8_t *data, const char *p)
Parse a string of hexadecimal strings.
Definition: utils.c:4920
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1780
Definition: hls.c:171
static void handle_variant_args(struct variant_info *info, const char *key, int key_len, char **dest, int *dest_len)
Definition: hls.c:363
const char * avio_find_protocol_name(const char *url)
Return the name of the protocol that will handle the passed URL.
Definition: avio.c:475
int size
Size of data in bytes.
Definition: buffer.h:93
URLContext * ffio_geturlcontext(AVIOContext *s)
Return the URLContext associated with the AVIOContext.
Definition: aviobuf.c:971
AVDictionary * metadata
Definition: avformat.h:1274
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
char audio_group[MAX_FIELD_LEN]
Definition: hls.c:187
int64_t av_gettime_relative(void)
Get the current time in microseconds since some unspecified starting point.
Definition: time.c:56
#define flags(name, subs,...)
Definition: cbs_av1.c:576
KeyType
Definition: hls.c:62
static int recheck_discard_flags(AVFormatContext *s, int first)
Definition: hls.c:2109
void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf, void *context)
Parse a string with comma-separated key=value pairs.
Definition: utils.c:4978
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
int64_t seek_timestamp
Definition: hls.c:148
char iv[35]
Definition: hls.c:384
#define OFFSET(x)
Definition: hls.c:2424
char characteristics[MAX_CHARACTERISTICS_LEN]
Definition: hls.c:472
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
const char * extensions
If extensions are defined, then no probe is done.
Definition: avformat.h:671
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:382
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:1431
int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
Read packets of a media file to get stream information.
Definition: utils.c:3622
const char * tag
Definition: id3v2.h:85
static double c[64]
int cur_seq_no
Definition: hls.c:202
int av_dict_set_int(AVDictionary **pm, const char *key, int64_t value, int flags)
Convenience wrapper for av_dict_set that converts the value to a string and stores it...
Definition: dict.c:147
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:929
static int open_url_keepalive(AVFormatContext *s, AVIOContext **pb, const char *url, AVDictionary **options)
Definition: hls.c:613
int64_t pos
position in the file of the current buffer
Definition: avio.h:238
int pts_wrap_bits
number of bits in pts (used for wrapping control)
Definition: avformat.h:1068
AVDictionary * avio_opts
Definition: hls.c:209
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:35
char * key
Definition: dict.h:86
int n_segments
Definition: hls.c:116
int den
Denominator.
Definition: rational.h:60
void avformat_close_input(AVFormatContext **s)
Close an opened input AVFormatContext.
Definition: utils.c:4498
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:215
int http_persistent
Definition: hls.c:213
static int ensure_playlist(HLSContext *c, struct playlist **pls, const char *url)
Definition: hls.c:603
static int hls_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: hls.c:2328
static av_always_inline int diff(const uint32_t a, const uint32_t b)
int av_opt_get(void *obj, const char *name, int search_flags, uint8_t **out_val)
Definition: opt.c:779
#define av_free(p)
int id3_found
Definition: hls.c:144
char name[MAX_FIELD_LEN]
Definition: hls.c:176
void ff_id3v2_read_dict(AVIOContext *pb, AVDictionary **metadata, const char *magic, ID3v2ExtraMeta **extra_meta)
Read an ID3v2 tag into specified dictionary and retrieve supported extra metadata.
Definition: id3v2.c:1112
char * value
Definition: dict.h:87
int eof_reached
true if was unable to read due to error or eof
Definition: avio.h:239
int len
int ff_id3v2_tag_len(const uint8_t *buf)
Get the length of an ID3v2 tag.
Definition: id3v2.c:156
void * priv_data
Format private data.
Definition: avformat.h:1379
static int hls_probe(const AVProbeData *p)
Definition: hls.c:2410
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:333
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:403
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:236
int64_t duration
Definition: hls.c:69
static void free_variant_list(HLSContext *c)
Definition: hls.c:277
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:2118
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:1881
char * ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase)
Definition: utils.c:4899
This structure stores compressed data.
Definition: packet.h:332
Definition: hls.c:63
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:348
AVPacket attached_pic
For streams with AV_DISPOSITION_ATTACHED_PIC disposition, this packet will contain the attached pictu...
Definition: avformat.h:958
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
#define tb
Definition: regdef.h:68
AVProgram ** programs
Definition: avformat.h:1531
static av_cold void cleanup(FlashSV2Context *s)
Definition: flashsv2enc.c:127
int64_t av_compare_mod(uint64_t a, uint64_t b, uint64_t mod)
Compare the remainders of two integer operands divided by a common divisor.
Definition: mathematics.c:160
static int select_cur_seq_no(HLSContext *c, struct playlist *pls)
Definition: hls.c:1719
static uint8_t tmp[11]
Definition: aes_ctr.c:26